Dr. Sharon Hertz is a trained neurologist who is currently...

Dr. Sharon Hertz is a trained neurologist who is currently a supervisory medical officer with the Food and Drug Administration. She works in the Division of Anesthesia, Analgesia, and Addition Products (DAAAP) in the Center for Drug Evaluation and Research. By having background in clinical practice, as well as nearly 15 years with the FDA, she as a unique perspective on public health that includes both individual treatment as well as broad public policies. In her position in DAAAP, Dr. Hertz acts as a deputy director of the division and a direct supervisor for ten physicians and oversees the work of chemists, animal pharmacologists and toxicologists, clinical pharmacologists, physicians, and statisticians. The division as a whole provides†¦show more content†¦Dr. Hertz is often called upon to give presentations within her agency or to outside groups including non-profits and the media. Over the long term, she helps to set policy requirements for drug approvals, safety monito ring and safety programs for analgesic products. During the government shutdown in October, it became clear that being a federal employee is not always easy and it is a position that can be vastly different from being a private employee. Dr. Hertz echoed this sentiment by saying that the current budget sequestration and government shutdown indicate the largest difficulties that federal workers face. In her mind, Dr. Hertz believes that federal employees have recently been used as political pawns that have been used by a heavily divided Congress who is often unable of collaboration. She also believes that this use may lead to long-term implication on the federal workforce. Seeing federal workers and the federal budget used in an unfair manner is not only demoralizing to current workers, but has also seriously affected recruitment and retention efforts for qualified candidates who worry about the long-term viability of a career in the federal government. Dr. Hertz indicated that Congr ess needs to stop violating federal workers in this way if they desire to continue to have a force of intelligent, hard-working federal employees to support the actions of our nation. Like thousands of others, Dr. HertzShow MoreRelatedFda Policies5132 Words   |  21 PagesU.S. Food and Drug Administration (FDA) drug review bears a structural similarity to many decisions made by other regulatory agencies: high uncertainty, low reversibility, avoidance of observable error, and high political stakes that induce lobbying by interested parties. This project explores the policy lessons to be learned from viewing FDA drug review as a politically shaped exercise in information processing. I argue that the incentives facing regulators induce limits on the degree to which drugRead MoreEssay On The FDA1104 Words   |  5 Pagesallowed access to potentially life saving medications, if they have not been approved by the FDA. Now, in theory, this should be a fine system by which the FDA, a fed eral government organization dedicated to medication research and safety, receives research on new experimental drugs and either approves, requires more research, or denies it. This is the case, but with one drastic problem: restrictions and time. The FDA is notoriously known for the numerous amount of years it takes them to approve a medicationRead MoreFDA Essay1067 Words   |  5 PagesThe U.S. Food and Drug Administration (FDA) is the governmental division that protects the public’s health by guaranteeing food, drugs, and medical devices are safe and effective. It assures that dietary supplements and cosmetics are well labeled, regulates tobacco, protects the users from electronic product radiation, among others. Deputy Director of The Division of Industry and Consumer (DICE), Bill Sutton explains how the FDA is set and works. FDA was given the duty of regulating all medicalRead MoreEssay On The FDA763 Words   |  4 PagesThe FDA is and agency that falls into the Department of Health and Human Services under the Executive Branch, probably the most interesting agency in my eyes because of its importance in the nation and how a mistake from them or maybe a wrong move can be lethal. This very important agency can actually be traced back to the 1800s but bills were placed after it earlier agencies to become what it is today after protests and cries of those living in the nation around the early 1900s. (Office of theRead MoreHistory of Fda2718 Words   |  11 PagesHistory of the FDA From a staff of one to over 9,000, the Food and Drug Administration has seen great changes since it was first created in 1862. Stemming from a single chemist in the U.S. Department of agriculture, the FDA now encompasses most food products, both human and animal drugs, cosmetics and animal feed. The FDA received it start under a different name. First called the Division of Chemistry, which played a small part in everyday life, then in July of 1901, the name was again changedRead More FDA Evaluation of Medication Essay1127 Words   |  5 Pages FDA Evaluation of Medication Introduction The main center within the FDA for the evaluation of medication is known as the Center for Drug Evaluation and Research. The center evaluates all drugs before they are sold. It currently evaluates more than 10,000 drugs that are on the market to ensure that highest standards of those drugs. They also monitor media broadcasts to make sure that messages portrayed are truthful to consumers. Lastly, they provide health care professionals as well as consumer’sRead MoreDisposal Of Unused Medications ( Fda ) Essay969 Words   |  4 Pagesto prevent drug diversion and protect our environment the FDA scheduled take –back days and proposed safe and effective strategies of drug disposal. Response/Literature review For many years, limited options and lack of proper education on medication disposal have contributed to increasing rates of environmental pollution and drug abuse. In order to prevent accidental or intentional misuse of the drugs Food and Drug Administration (FDA) recommends that consumers discard their unused medicationRead MoreRegulations Of The Fda On Cosmetics Essay1743 Words   |  7 Pages Limited regulations of The FDA on cosmetics Frequently, consumers like you and I buy items everyday not knowing chemicals or harsh byproducts that they are made with. We trust that cosmetic products we buy everyday will be safe, but there are ingredients in our daily products that could or has caused some health or skin conditions. In 1820, the U.S gathered physicians to create, The FDA and regulations on drugs in the United States. The general purpose of The Food and Drug Act was to have aRead MoreThe And Drug Administration ( Fda )1460 Words   |  6 PagesBackground and Introduction: Clinical trials evaluating the use of Yttrium-90 (Y-90) transarterial radioembolization for hepatic tumors date back to the 1960s. The U.S. Food and Drug Administration (FDA) approved the use of TheraSphere ® (BTG, Ontario, Canada) particles for hepatocellular carcinoma (HCC) via humanitarian device exemption (HDE) in 1999 and SIR-Spheres ® (SIRTex Technology Pty, Lane Cove, Australia) particles for colorectal cancer metastases in 2002. Since then†¦.[talk more about recentRead MoreFda Research Paper2360 Words   |  10 PagesFDA Drug Approval Process Tricia Garbuzovas COM/172 October 5, 2011 Cassandra Baker FDA Drug Approval Process Americans must wait up to 19 years after a discovered treatment before they can participate in benefits of a new medication (Philipson Sun, 2008). The regulatory process drug manufacturers need to endure before releasing potentially life-saving medication is an extremely expensive, time-consuming process. The Center for Drug Evaluation and Research (CDER) is the main department

Mini Project Free Essays

string(160) " was a major advance in the ability of machines to faithfully reproduce complex part machining steps more accurately without human intervention or variability\." CONTENTS 1| ABSTRACT| | 2| ABBREVIATION| | 3| INTRODUCTION TO NC AND CNC| 4| 4| HISTORY| 7| 5| CNC SYSTEM ELEMENTS| 10| 6| WORING ON CNC MACHINES| | 7| BASIC CONCEPTS OF PART PROGRAMMING| 16| 8| TYPES OF CNC MACHINES| 18| 9| PROPERTIES OF CNC MACHINES| 20| 10| DRILLING AND TAPPING ON CNC| 35| 11| APPLICATIONS OF CNC MACHINES| 49| 12| ADVANTAGES AND DISADVANTAGES OF CNC| 51| 13| CONCLUSION| 52| LIST OF FIGURES PAGE NO 1| Hydrotel Milling Machine| 5| 2| Chiron CNC Machine| 5| 3| CNC Lathe Machine| 6| | CNC elements block diagram| 10 | 5| Point to Point tool path| 11| 6| Contour Tool Path| 12| 7| Continuous path tool movements| 18| 8| Continuous path controllers| 19| 9 | Schematic Illustrations of components(a)An open loop(b)A closed loop control| 19| 10| CNC Lathe| 21| 11| CNC Grinders| 21| 12| CNC Drilling| 22| 13| CNC Boring machine| 22| 14| Electrical Discharge Machines (EDM)| 23| 15| Laser cutting machine tools| 23| 16| Flat bed CNC Lathe| 25| 7| Slant bed CNC Lathe| 25| 18| CNC To ol Turrent| 26| | | | | | | | | | | | | 28| Different tools in Drilling machines| 26| 20| Tool Holders| 27| 21| CNC with Fanuc control| 28| 22| CNC setter| 29| 23| Override Speed setter| 31| 24| CNC Backlash| 32| 25| Sensitive Drilling machine| 37| 26| Radial drilling machine| 38| 27| Up-right Drilling machine| 38| 28| Drill materials| 39| 29| Tool nomenclature| 40| 30| Tool holding devices| 41| 31| Various operations of drilling machines| 42| 32| Counter Boring| 43| 33| Counter sunk| 43| 34| Spot Facing| 43| 35| Hands Taps| 46| 36| Holding Devices| 48| 7| Types of Clamps and C- Clamps| 49| 38| Products used in Aerospace Industry| 49| 39| 5 Axis CNC Milling machine| 50| 3. INTRODUCTION TO NC AND CNC Numerical control  (NC) refers to the  automation  of  machine tools  that are operated by programmed commands encoded on a storage medium, controlled manually via hand wheels or levers, or mechanically automated via cams alone. The first NC machines were built in the 1940s and 1950s. We will write a custom essay sample on Mini Project or any similar topic only for you Order Now These early servomechanisms were rapidly augmented with analog and digital computers, creating the modern  computer numerical control  (CNC) machine tools that have revolutionized the  machining  processes. The program is translated into the appropriate electrical signals for input to motors that run the machine. A CNC machine is an numerical control machine with the added feature of an on board computer. The computer is referred to as the machine control unit (MCU). In modern CNC systems, component design is highly automated using  computer-aided design  (CAD) and  computer-aided manufacturing (CAM) programs. The programs produce a computer file that extracts the commands needed to operate a particular machine, and then loaded into the CNC machines for production. Since any component might require the use of a number of different tools-drills, saws, etc. , modern machines often combine multiple tools into a single â€Å"cell†. The Evolution of NC It was in 1947 when numerical control was born. It began when John C. Parsons of the Parsons Corporation, Traverse City, Michigan, a manufacturer of helicopter rotor blades, could not make his templates fast enough. So, he invented a way of coupling computer equipment with a jig borer. Mr. Parsons used punched cards to operate his digit Ron system. 1949 was the year of another â€Å"Urgent need†. The U. S. Air Material command realized that parts for its planes and missiles were becoming more complex. Also, as the designs were constantly being improved, changes in the drawing were frequently made. Thus, in their search for methods of faster production, an Air Force study contract was awarded to the Parsons Corporation. The servo mechanisms laboratory of the Massachusetts Institute of Technology (MIT) was the subcontractor. In 1951, MIT took over the complete job, and in 1952, the prototype of today’s NC machine, a modified Cincinnati Hydrotel Milling Machine, was successfully demonstrated. The numerical control was originated at MIT. Fig:1 Fig:2 CNC MACHINES CNC stands for Computer Numerically Controlled. CNC refers to how a machine operates, that is, its basic method of controlling movement, e. g. , a CNC machine uses a stream of digital information (code) from a computer to move motors and other positioning systems in order to guide a spindle or other tooling over raw material. A CNC machine uses mathematics and coordinate systems to understand and process information about what to move, to where, and how fast. Most CNC machines are able to move in three controlled directions at once. These directions are called axes and are given simple names such as X, Y and Z (based on the Cartesian Co-ordinate System). The X axis is always the longest distance a machine or a part of a machine must travel. X may be the movement from front to back, Y the movement from left to right, and the Z is almost always vertical movement (normally the spindle’s positioning movement up and down). Superior Machinery sells many types of CNC Machines, from CNC Horizontals, CNC Verticals to CNC Lathes; they have over 182 CNC Machines to choose from. A CNC machine must be able to communicate with itself to operate. A computer numeric control unit sends position commands to motors. The motors must talk back to the control that, indeed, they have acted correctly to move the machine a given distance. The ability of CNC machines to move in three (or more) directions at once allows them to create almost any desired pattern or shape. All of this processing happens very fast, accurately and consistently. 4. HISTORY Fig:3 In 1775, John Wilkinson- cannon boring machine (lathe). In 1881, Eli Whitney- milling machine. In 1947, Mr. John Parsons began experimenting for using 3-axis curvature data to control the machine tool motion for the production for aircraft components. In 1949, parsons- first NC machine. In 1951, MIT was involved in the project. In 1955, after refinements NC became available in industry . Today, modern machineries are CNC milling machines and lathes. CNC technology was developed in the United States in the 1950? s for the US Air Force by metalworking machine tool builders. It was a major advance in the ability of machines to faithfully reproduce complex part machining steps more accurately without human intervention or variability. You read "Mini Project" in category "Papers" Numerical control (NC) refers to the automation of machine tools that are operated by abstractly programmed commands encoded on a storage medium, as opposed to manually controlled via handwheels or levers, or mechanically automated via cams alone. The first NC machines were built in the 1940s and 1950s, based on existing tools that were modified with motors that moved the controls to follow points fed into the system on punched tape. These early servomechanisms were rapidly augmented with analog and digital computers, creating the modern computer numerical control (CNC) machine tools that have revolutionized the machining processes. In modern CNC systems, end-to-end component design is highly automated using computer-aided design (CAD) and computer-aided manufacturing (CAM) programs. The programs produce a computer file that is interpreted to extract the commands needed to operate a particular machine via a postprocessor, and then loaded into the CNC machines for production. Since any particular component might require the use of a number of different tools-drills, saws, etc. , modern machines often combine multiple tools into a single â€Å"cell†. In other cases, a number of different machines are used with an external controller and human or robotic operators that move the component from machine to machine. In either case, the complex series of steps needed to produce any part is highly automated and produces a part that closely matches the original CAD design. Proliferation of CNC The price of computer cycles fell drastically during the 1960s with the widespread introduction of useful minicomputers. Eventually it became less expensive to handle the motor control and feedback with a computer program than it was with dedicated servo systems. Small computers were dedicated to a single mill, placing the entire process in a small box. PDP-8? s and Data General Nova computers were common in these roles. The introduction of the microprocessor in the 1970s further reduced the cost of implementation, and today almost all CNC machines use some form of microprocessor to handle all operations. The introduction of lower-cost CNC machines radically changed the manufacturing industry. Curves are as easy to cut as straight lines, complex 3-D structures are relatively easy to produce, and the number f machining steps that required human action have been dramatically reduced. With the increased automation of manufacturing processes with CNC machining, considerable improvements in consistency and quality have been achieved with no strain on the operator. CNC automation reduced the frequency of errors and provided CNC operators with time to perform additional tasks. CNC automation also allows for more flexibility in the way parts are held in the manufacturing process and the time required to change the machine to produce different components. During the early 1970s the Western economies were mired in slow economic growth and rising employment costs, and NC machines started to become more attractive. The major U. S. vendors were slow to respond to the demand for machines suitable for lower-cost NC systems, and into this void stepped the Germans. In 1979, sales of German machines surpassed the U. S. designs for the first time. This cycle quickly repeated itself, and by 1980 Japan had taken a leadership position, U. S. sales dropping all the time. Once sitting in the #1 position in terms of sales on a top-ten chart consisting entirely of U. S. ompanies in 1971, by 1987 Cincinnati Milacron was in 8th place on a chart heavily dominated by Japanese firms. Many researchers have commented that the U. S. focus on high-end applications left them in an uncompetitive situation when the economic downturn in the early 1970s led to greatly increased demand for low-cost NC systems. Unlike the U. S. companies, who had focused on the highl y profitable aerospace market, German and Japanese manufacturers targeted lower-profit segments from the start and were able to enter the low-cost markets much more easily. As computing and networking evolved, so did direct numerical control (DNC). Its long-term coexistence with less networked variants of NC and CNC is explained by the fact that individual firms tend to stick with whatever is profitable and their time and money for trying out alternatives is limited. This explains why machine tool models and tape storage media persist in grandfathered fashion even as the state of the art advances. 5. CNC SYSTEM ELEMENTS A typical CNC system consists of the following six elements. 1 Part program 2 Program input device 3 Machine control unit 4 Drive system 5 Machine tool 6 Feedback system Fig:4 6. WORKING OF CNC MACHINES: CNC machines are Controlled by G and M codes. These are number values and co-ordinates. Each number or code is assigned to a particular operation. Typed in manually to CAD by machine operators. GM codes are automatically generated by the computer software. The tool or material moves. Tools can operate in 1-5 axes. Larger machines have a machine control unit (MCU) which manages operations. Movement is controlled by a motor (actuators). Feedback is provided by sensors (transducers) Closed loop. Tool magazines are used to change tools automatically. Tool Paths and Cutting   Motions: Tool paths describe the route the cutting tool takes. Motion can be described as point to point, or contouring. Speeds are the rate at which the tool operates e. g. rpm. Feeds are the rate at which the cutting tool and work piece move in relation to each other. Expressed in IPM (inches per minute) Feeds and speeds are determined by cutting depth, material and quality of finish needed. e. g . harder materials need slower feeds and speeds. Rouging cuts remove larger amounts of material than finishing cuts. Rapid traversing allows the tool or work piece to move rapidly when no machining is taking place. Fig:6 Point to Point Tool path Fig:5Contour ToolPath 1. Point to Point tool paths cut following lines 2. Contour tool paths cut follow surfaces Linear Interpolation: (Point to Point) Linear interpolation consist of a programmed point linked together by straight line Fig:7 Circular Interpolation: (Contour) Circular interpolation is the process of programming arcs and circles. Circular interpolation requires endpoints, a feed rate, a center, a radius, and a direction of movement. Block of Information: When running, a part program is interpreted one command line at a time until all lines are completed. Fig:8 N001 G01 X1. 2345 Y. 06789 MO3 N001:Represents the sequence number of the operation G01: Represents linear operation (tool movement) X12345: Will move the tool or table 1. 2345 in. a positive direction along the X axis Y6789:Will move the tool or table 0. 6789 in. along the Y axis M03:Turns spindle on clockwise Commands, which are also referred to as blocks, are made up of words which each begin with a letter address and end with a numerical value. Each letter address relates to a specific machine function. â€Å"G† and â€Å"M† letter addresses O-Program number (Used for program identification) N-Sequence number (Used for line identification) G-Preparatory function X-X axis designation Y-Y axis designation Z-Z axis designation R-Radius designation F-Feed rate designation S-Spindle speed designation H-Tool length offset designation D-Tool radius offset designation T-Tool Designation M-Miscellaneous function G- CODES (Preparatory Functions) which cause some movement of the machine table or head. G00 – Rapid Movement G01- Linear Interpolation (movement) G02- Circular Interpolation, CW G03- Circular Interpolation, CCW G17 -XY Plane,G18- XZ Plane,G19 -YZ Plane G20/G70 -Inch units G21/G71 -Metric Units G40- Cutter compensation cancel G41 -Cutter compensation right G43- Tool length compensation (plus) G43- Tool length compensation (plus) G44- Tool length compensation (minus) G49-Tool length compensation cancel G80-Cancel canned cycles G81-Drilling cycle G82-Counter boring cycle G83-Deep hole drilling cycle G90-Absolute positioning G91- Incremental positioning M-CODES (Miscellaneous) which turn ON or OFF different functions M00 -Program stop M01 -Optional program stop M02 -Program end M03- Spindle on clockwise M04 -Spindle on counterclockwise M05- Spindle stop M06- Tool change . BASIC CONCEPTS OF PART PROGRAMMING Part programming contains geometric data about the part and motion information to move the cutting tool with respect to the worpiece. Basically, the machine receives instructions as a sequence of blocks containing commands to set machine parameters; speed, feed and other relevant information. A block is equivalent to a line of codes in a part program. N 135 G01 X1. 0 Y1. 0 Z0. 125 T01 F5. 0 These define: N135-Block number G01-G codes X1. 0, Y1. 0, Z0. 125-Coordinates T01-Tool number F5. 0-Special function Programming Methods Automatically Programmed Tools (APT): A text based system in which a programmer defines a series of lines, arcs, and points which define the overall part geometry locations. These features are then used to generate a cutter location (CL) file. Computer Aided Machining (CAM) Systems-Computer Aided Design (CAD) Systems: CAD/CAM systems allow for rapid development and modifying of designs and documentation. The 3D geometric model produced becomes a common element for engineering analysis (FEA), machining process planning (including CNC part programming, documentation (including engineering drawings), quality control, and so on. Drives of CNC machine tool Hydraulic actuator – high power machine tool Stepping motor – small machine due to limited power and torque DC motor – excellent speed regulation, high torque, most widely used. 8. PROPERTIES OF CNC MACHINES Based on Motion Type: Motion control – the heart of CNC: Point-to-Point or Continuous path Based on Control Loops: Open loop or Closed loop Based on Power Supply: Electric or Hydraulic or Pneumatic Based on Positioning System: Incremental or Absolute Point-to-Point Tool Movements: Point-to-point control systems cause the tool to that point only. The tool is not in continuous contact with the part while it is moving. Examples: drilling, reaming, punching, boring and tapping. Fig:9 Continuous-Path Tool Movements : Continuous-path controllers cause the tool to maintain continuous contact with the part as the tool cuts a contour shape. These operations include milling along any lines at any angle, milling Fig:10 Arcs and lathe turning. Loop Systems for Controlling Tool Movement: Schematic illustration of the components of (a) an open-loop and (b) a closed-loop control system for a CNC machine. 9. TYPES OF CNC MACHINES * Lathe Machine * Milling Machine Drilling Machine -The bench drill -The pillar drill * Boring Machine * Grinding Machine CNC Mills: These machining centers use computer controls to cut different materials. They are able to translate programs consisting of specific number and letters to move the spindle to various locations and depths. Used to make 3D prototypes, moulds, cutting dies, printing plates and sights. CN C Lathes: They cut metal that is often turning at fast speeds. CNC lathes are able to make fast ,precision cuts using Indexable tools and drills with complicated programs. Normally, they cannot be cut on manual lathes. They often include 12 tool holder sand coolant pumps to cut down on tool wear. Fig:11 CNC Grinders: Grinding metal process uses a coated wheel that slowly removes metal to create a part. Through the years, grinding was done on a manual machine, but with the advent of CNC technology, the grinding process has advanced . Fig:12 CNC DRILLING: Drilling is commonly used for mass production. The drilling machine (drilling press) is used to create or enlarge holes. The bench drill: For drilling holes through raw materials such as wood, plastic and metal The pillar drill: A larger version that stands upright on the floor. As the bench drill, it can be used to drill larger pieces of materials and produce bigger holes. Fig:13 CNC Boring: Process of enlarging an existing hole or internal cylindirical surface. This can be accomplished on a lathe or a machine tool specifically designed for the process, such as a horizontal boring machine. Fig:14 Electrical Discharge Machines (EDM): Wire EDM machines utilize a very thin wire (. 0008 to . 012in. ) as an electrode. The wire is stretched between diamond guides and carbide that conduct current to the wire and cuts the part like a band saw. Material is removed by the erosion caused by a spark that moves horizontally with the wire. Fig:15 Laser Cutting Machines: The machine utilizes an intense beam of focused laser light to cut the part. Material under the beam experiences a rapid rise in temperature and is vaporized. Laser cuts with a minimum of distortion, no mechanical cutting forces. Specific tools to perform different Operations: Fig:16Fig:17 CNC lathe machine tool turret is part of the CNC machine where all tooling is mounted. CNC lathe tool turret has an integral Disk like part (Tool turret disk) on which all the tools are mounted. CNC lathe tool turret is mounted on the x-axis carriage. Fig:18 Slant Bed CNC Lathe / Flat Bed CNC Lathe On some CNC lathe machines x-axis carriage with the tool turret is located behind the spindle (such cnc lathe machines are called  slant bed cnc lathe machines) and on other cnc lathe it is located at the front (as normal lathe machines) such cnc lathe machines are called  flat bed cnc lathe machine. The below is a Slant Bed CNC Lathe Machine. Fig:19 Fig:20 CNC Lathe Tool Turret Tool Capacity: Tool capacity for cnc lathe machines varies machine to machine. Small CNC lathe machines normally comes with a tool turret capacity of 4 or 8 tools stations. Bigger and  heavy CNC lathe machines tool turrets are big and heavy and accordingly will hold more tools such as 12 or more. Fig:21 Tool Holder: Tool holder is the actual part which fastens   the tool to the cnc lathe tool turret Disk. Tool holder size also depends upon the cnc lathe tool turret size, heavy CNC late machine tool turret comes with with big bore for tool holders such as 50 mm diameter. For the small tool turret this might be 40 mm diameter or, less to suit the tool to hold. Fig:22 CNC Lathe Tool Turret Rotation CNC lathe tool turret rotates with the cnc program commands. Normally a letter â€Å"T† is used to call a tool in the working position. The tool rotation is dependent on cnc lathe machine. Some cnc lathe tool turret rotate in one direction (CW or CCW ). Some cnc lathe tool turret rotates both directions, such tool turret direction is optimized for the nearest tool station. Some cnc lathe give full control over tool call up, you can call by optimized direction or you can call tool by rotating tool turret by CW direction or CCW. Tool Offset in CNC Lathe with Fanuc Control Fig:23 There are variety of cnc machines in the market, and almost every cnc machine in a  cnc workshop  has different kind of cnc machine controls if controls are not different they might have different versions of the same cnc machine control. As the operating of different cnc machines controls is very much different from one another the same way  Tool Offsetting  is very much different. Here I will discuss the cnc tool measurement on Fanuc. Tool Offset Setting on Fanuc TC Some cnc machines has some kind of built-in mechanism of tool-offsetting, this built-in mechanisn of tool-offsetting makes adding new tools are changing existing tools a breeze, because you just tie-up the tool in the tool-post on the  cnc machine tool-turret  and just perform the procedure the cnc machine manufacture has given in the cnc machine operating and setting manual. The  Fanuc  controls such as Fanuc TC has this capability, Just tie up tool in the tool turret and perform a simple procedure and everything is done. The tool offsetting procedure might be different from version to version, But on Fanuc TC this procedure is simple as under. For tool offsetting of a new tool just tie up the tool in the tool post and in  MDI (Manual Data Input) Mode  call up the tool in the working position by entering the command T1, the T is for tool call up and 1 is tool number if you have your tool on another position you might change that with that tool number. Now change the cnc machine to Jog Mode and touch the tool cutting point to the finished component (already gripped in cnc machine jaws) face and bring the Tool-Geometry page and enter under the tool number the command MZ0 this command will clear any previous values and will measure the current tool’s tool-offset in Z-axis. Now touch the tool to a  known-diameter  on the component and again in the tool-geometry page enter the command MX50 you can enter the measured diameter value instead of 50. This way now we have calculated the tool-measurement on the Fanuc TC cnc machine control. CNC Dry Run Invaluable Tool for CNC Setter: Fig:24 It shows the power and the flexibility the cnc machine manufacturers and cnc control manufacturers give a  cnc machine setter  by integrating the Dry Run  on cnc machines. On some cnc machines the Dry Run is added as a  CNC Machine Mode  like Fanuc. On Fanuc cnc control you just select the Dry Run mode and cnc machine is now in Dry Run Mode. Introduction of Dry Run for CNC Machines Setting a new component on a cnc machine is not an easy job. You have to go through many important tasks like cnc machine zero offsetting (cnc machine shift value setting),tool offsetting of tools  used on cnc machine etc. Now if you have completed these all tasks, now comes the time to run the cnc program for the first time, A really crucial and time consuming cnc task. A small negligence might be cause of an accident on cnc machine (tool breakage etc. . To make the first run easy and safe the cnc machine manufacturers and cnc control manufacturers provide us a way by which we can easily control the tools feed with  feed override. So now the cnc setter is a bit easy because he can now run all the tools with a  Safe Feed. Now cnc setter easily can lower the tool feed when he feels the tool is entering a bit danger zone, and easily can increase t he tool feed (to a rapid feed) when the tool is away from the component (so the time not go wasted with lower feed when tool is away from component). In Dry Run all the cnc blocks whether those are starting with G00 or G01 and other  G-code  like G02/G03 run with the same feed, which is controlled through Feed Override. On Fanuc the feed override is controlled through  Handwheel  after feed override button press, and there also exists a Rapid Feed Button which if pressed during Dry Run Mode the cnc machine program block will run with Rapid Feed. One point must be cleared for Fanuc control is that feed override also works in  Auto Mode and Single Block Mode  but in such modes the feed override only controls G01/G02/G03 like G-code. But feed override will not control the G00 (Rapid Traverse). But in Dry Run Mode all the cnc program will run with the feed which is controlled through Feed Override. An introduction to cnc machine speed override and feed override controls and safety instructions which must be adhere to while working with cnc machine feed and speed override. CNC Machine Speed Override / Feed Override Introduction Normally you program the speed and feed this way, N10 G97 S1000 G95 F0. 3 Fig:25 Now for one reason or other you want to increase or decrease the speed or feed of the cnc machine  for some time, you definitely have a way to just alter the  cnc machine program, but there is one more suitable solution the Feed Override and Speed Override Controls. The feed override and speed override are  the most suitable and handy way to control the  cnc machine feed and speed through cnc control panel. You control the speed and feed in percentage. When the feed override  is 100% the actually feed  which is programmed will be active. But if the feed override  is 50% then the feed  will decrease by that ratio, now the machine tools will run with 50% of feed. So if you  have programmed 0. 5 mm/rev feed then with 100% the 0. 5 will be active, but for 50%  feed override the actually tool feed will be 0. 25 mm/rev. The same rule applies for speed override, for 100% the actual programmed speed will be active and spindle will revolve  with the actual programmed speed. But  at 50% speed  override the spindle speed will drop by 50%. Feed Override Speed Override Minimum Maximum Values: Normally you can control speed override and feed override from 0% to 120%. At 0% speed override the spindle will stop rotating, and at 0% feed override the tool will stop working ( the tool will be stationary ). No doubt  120% feed  override and speed override is just  safe. But some cnc machines give even more flexibility I  have worked on a cnc machine which has its feed override 0% to 200%. Normal cnc machine has just 0% to 120% feed  override and speed override. Speed Override and Feed Override Safety Precautions Whenever handling the speed override and feed override always think about safety, safety of yourself, tool, machine, component and your surroundings. Never try to use the speed override and feed override if you don’t need it. Because when cnc programs are made the speed and feed is properly set for the machined component. The increase in feed or speed might break insert or even tool. CNC Backlash CNC Troubleshooting, In this category we will see the cnc machine from a different view (cnc machine maintenance), your feedback will really matter, and I hope you will share you knowledge and experience. I will talk about the  CNC  Backlash  which is found in cnc machine axis. * what is cnc backlash, * cnc backlash causes, * when to worry about cnc backlash, how to measure backlash, * How to resolve and compensate cnc backlash through hardware and cnc control software. Fig:26 *What is CNC Backlash? CNC Backlash is any kind of play which is found in cnc machine axis. or you might say, CNC Backlash  is non-movement of the cnc axis which occurs on axis reversal. *Causes of CNC Backlash? This play (backlash) might be due to * Clearance which is kept in mechanical parts to reduce friction. * As mechanical parts get loose with time. * As with time mechanical parts keep moving and rubbing each other and after long time they lose their actual shape and size. CNC Backlash Is already there A cnc machine axis move due to their  Lead Screw  and  Lead Screw Nut. There is always kept a very minor backlash in the lead screw and lead screw nut to reduce damage and wear. *CNC Backlash When to Worry It is good if your cnc machine axis backlash is near 0. 0001? but not always possible, so 0. 0003? to 0. 0004? is acceptable. But if the amount of play in the lead screw and nut crosses this limit then there is the time to worry, and call up you mechanical maintenance guys. CNC Backlash How to Measure? CNC machine backlash can be measure with a  Dial Indicator  attached to an Adjustable Stand. Put the stand on the cnc bed and direct the needle (plunger) of the dial indicator towards the axis which you want to measure. 1. Set the dial needle to 0. 0mm (zero). 2. Now move the axis in one direction 0. 5mm. Dial indicator should show 0. 5mm travel. 3. Now reverse the same axis 0. 5mm. If your dial indicator now goes back to 0. 0mm, then everything is okay. But otherwise, if on reversal the dial lags behind, then the amount the dial lags behind is the backlash. CNC Backlash How to Resolve? ( Backlash Compensation ) Now you have two choices the hardware way and software way to resolve cnc backlash. You first better choose the hardware way, because normally backlash is due to lead screw or lead screw nut wear, so better resolve the issue by tightening them a bit if they are loose than required, there are plenty of other hardware ways to cope with backlash. CNC controls also give us the ability to control (compensate) cnc backlash through their parameters. CNC Backlash Compensation through CNC Control Parameters How Much Successful? The better advice is that you resolve the issue by changing the lead screw (if possible) or lead screw nut, or just tightening them if they are loose might work, but otherwise CNC control parameters can be changed to compensate backlash, the cnc lathe machine I work on with fanuc control has the 0. 012mm set in its parameters as the backlash compensation for x-axis and z-axis. So such values can be changed to resolve the backlash issue. 10. DRILLING AND TAPPING ON CNC MACHINES Drilling is the operation of producing circular hole in the work-piece by using a rotating cutter called DRILL. The machine used for drilling is called drilling machine. The drilling operation can also be accomplished in lathe, in which the drill is held in tailstock and the work is held by the chuck. The most common drill used is the twist drill. Drilling Machine It is the simplest and accurate machine used in production shop. The work piece is held stationary ie. Clamped in position and the drill rotates to make a hole. Types 1) Based on construction: Portable, Sensitive, Radial, up-right, Gang, Multi-spindle 2) Based on Feed: Hand driven ,Power driven Components of drilling machine: Spindle The spindle holds the drill or cutting tools and revolves in a fixed position in a sleeve. Sleeve The sleeve or quill assembly does not revolve but may slide in its bearing in a direction parallel to its axis. When the sleeve carrying the spindle with a cutting tool is lowered, the cutting tool is fed into the work: and when it’s moved upward, the cutting tool is withdrawn from the work. Feed pressure applied to the sleeve by hand or power causes the revolving drill to cut its way into the work a fraction of an mm per revolution. Column The column is cylindrical in shape and built rugged and solid. The column supports the head and the sleeve or quill assembly. Head The head of the drilling machine is composed of the sleeve, a spindle, an electric motor and feed mechanism. The head is bolted to the column. Worktable The worktable is supported on an arm mounted to the column. The worktable can be adjusted vertically to accommodate different heights of work or it can be swung completely out of the way. It may be tilted up to 90 degree in either direction, to allow long pieces to be end or angle drilled. Base The base of the drilling machine supports the entire machine and when bolted to the floor, provides for vibration-free operation and best machining accuracy. The top of the base is similar to the worktable and may be equipped with t- slot for mounting work too larger for the table. Hand Feed The hand- feed drilling machines are the simplest and most common type of drilling machines in use today. These are light duty machine that are operated by the operator, using a feed handled, so that the operator is able to â€Å"feel† the action of the cutting tool as it cuts through the work piece. These drilling machines can be bench or floor mounted. Power feed The power feed drilling machine are usually larger and heavier than the hand feed ones they are equipped with the ability to feed the cutting tool in to the work automatically, at preset depth of cut per revolution of the spindle these machines are used in maintenance for medium duty work or the work that uses large drills that require power feed larger work pieces are usually clamped directly to the table or base using t –bolts and clamps by a small work places are held in a vise. A depth –stop mechanism is located on the head, near the spindle, to aid in drilling to a precise depth. Sensitive or Bench Drilling Machine * This type of drill machine is used for very light works. Fig. 1 illustrates the sketch of sensitive drilling machine. * The vertical column carries a swiveling table the height of which can be adjusted according to the work piece height. * The table can also be swung to any desired position. * At the top of the column there are two pulleys connected by a belt, one pulley is mounted on the motor shaft and other on the machine spindle. * Vertical movement to the spindle is given by the feed handle by the operator. * Operator senses the cutting action so sensitive drilling machine. Fig:27 Up-Right Drilling Machine * These are medium heavy duty machines. * It specifically differs from sensitive drill in its weight, rigidity, application of power feed and wider range of spindle speed. Fig. 2 shows the line sketch of up-right drilling machine. * This machine usually has a gear driven mechanism for different spindle speed and an automatic or power feed device. * Table can move vertically and radially. * Drill holes up to 50mm Fig:28 Radial Drilling Machine * It the largest and most versatile used for drilling medium to large and heavy work pieces. Radial drilling machine belong to power feed type. * The column and radial drilling machine supports the radial arm, drill head and motor. Fig. 3 shows the line sketch of radial drilling machine. * The radial arm slides up and down on the column with the help of elevating screw provided on the side of the column, which is driven by a motor. * The drill head is mounted on the radial arm and moves on the guide ways provided the radial arm can also be swiveled around the column. * The drill head is equipped with a separate motor to drive the spindle, which carries the drill bit. A drill head may be moved on the arm manually or by power. * Feed can be either manual or automatic with reversal mechanism. Drill Materials The two most common types are 1. HSS drill- Low cost 2. Carbide- tipped drills – high production and in CNC machines Other types are: Solid Carbide drill, TiN coated drills, carbide coated masonry drills, parabolic drills, split point drill. Fig. 4 shows various types of drills. Drill fixed to the spindle Fig:30 Tool Nomenclature: Fig. 31 Nomenclature of twist drill Tool holding devices Fig. 7 and Fig. 8 shows the different work holding and drill drift device. The different methods used for holding drill in a drill spindle are * By directly fitting in the spindle hole. * By using drill sleeve * By using drill socket * By using drill chuck Fig:32 Drilling operations: Operations that can be performed in a drilling machine are * Drilling * Reaming * Boring * Counter boring * Countersinking * Tapping Drilling: It is an operation by which holes are produced in solid metal by means of revolving tool called ‘Drill’. Fig. 9 shows the various operations on drilling machine. Reaming: Reaming is accurate way of sizing and finishing the pre-existing hole. Multi tooth cutting tool. Accuracy of 0. 005mm can be achieved. Boring: Boring is a process of enlarging an existing hole by a single point cutting tool. Boring operation is often preferred because we can correct hole size, or alignment and can produce smooth finish. Boring tool is held in the boring bar which has the shank. Accuracy of 0. 005mm can be achieved. Fig. 33 Various operations on drilling machine Counter Bore :- This operation uses a pilot to guide the cutting action to accommodate the heads of bolts. Fig. 10 illustrates the counter boring, countersunk and spot facing processes. Countersink:- Special angled cone shaped enlargement at the end of the hole to accommodate the screws. Cone angles of 60 °, 82 °, 90 °, 100 °, 110 °, 120 ° Fig. 34 Counter boring, countersunk and spot facing Drilling  machines are tools that have a rotating, cutting component at one end that bores holes into different materials. There are several types of  drilling  machines that may be used for a wide variety of purposes, including woodworking, construction,  masonry, metalworking, medicine, oil  drilling, and many other fields. Common drills include the hand drill, push drill, pistol-grip drill, hammer drill, and  drill press. In addition to making holes, drills are often used to push screws into wood, metal, plastic, rock, or composites. The hand drill and push drill are both manually operated  drilling  machines that have been largely replaced by power drills. A hand drill works by turning a crank that rotates gears, which cause the chuck to turn. The chuck is the component of the  drilling  machine  that holds the bit, or the end cutting piece. The push drill is a skinny tool resembling a screwdriver with a handle that can be pushed down on a threaded shaft, or a pole with helical ridging. As the handle is pushed down along threading, the shaft, chuck, and bit spins downward, much like pumping a toy metal top. Pistol-grip drills are the most commonly used  drilling  machines. These are corded electric drills that are typically shaped roughly like a pistol, with a trigger switch that starts a motor inside the drill. The motor causes the chuck and bit to spin in continuous revolutions. These drilling  machines may be used to make holes for bolts or other purposes, to push screws into wood, plastic, or other materials, and to bore countersinks. A  countersink  is a screw-shaped hole that is made before the screw is drilled in, preventing splintering or pulling of the plastic or wood around the head of the screw. A pistol-grip drill is also available in a battery-powered, cordless version, though they are usually more expensive. There are many different types of this drill and several indications for use. It is also possible to adapt the drill with an attachment, such as sanding or sawing components. A hammer drill, also called a rotary hammer, is similar to a pistol-grip drill, but also applies a punching motion to complement the rotational action of the bit. This hammering, forward force makes it useful for tougher materials, such as concrete or stone, that standard electric drills cannot cut through. For softer materials, however, the hammer drill may apply excessive force and a standard drill may be a better choice. A drill press is a type of drill that may stand on the floor or be mounted on a workbench. The base of the  machine  is bolted to the table or floor and a column rises up from the base to support the back of the head of the drill. The column also supports a table that can be adjusted in height between the head and the base. The spindle, a metal component that holds the chuck and drill bit, extends downward from the front of the head, parallel to the column. A larger distance between the spindle and column allows wood with a larger width to be drilled. An â€Å"on† switch triggers the spindle to spin and levers attached to the head of the drill press move the spindle and chuck to move up or down. These  drilling  machines are suited for accurate  drilling, because the bit is fixed and the work can be secured to the table with clamps or a vise. ————————————————- Types Of Drill Bits Drill bits are tools used in making cylindrical holes. Various types of drill bits are designed for different uses. Drill bits are equipments or tools that are used in making cylindrical holes. Drill bits can also be referred to as a drilling machine. Drill bits are available in various drill types such as metal drills, gun drills, screw machine drills, core drills, step drills, spade drills, forstner drills, masonry drills, dental or surgical drills, wood bits, twist drills, drill blank taper drills and much more. They are designed to cut while doing a clockwise rotating motion. Several drill bits are coolant fed. They contain a channel or hole for directing the coolant fed near to the cutting edges. The split point drill heads of drill bits are used for chip clearance and for excellent centering. Drill bits can also be used in cutting aluminum, general-purpose metals, brass, copper, bronze, ceramic, and plastic, stainless steel, steel, wood, titanium and hardened materials. Various types of drill bits are designed for different uses. Listed below are some types of Drill Bits. Twist Drill: It drills holes in plastic, metal and wood. This drill is currently produced with a width covering a range from 0. 5 millimeters to 100 millimeters while its length is around 1000 millimeters. The most usual twist drill has a tip angle of 118 degrees. This is a proper angle for an extensive array of job. It also has a long series drill for extended length twist drills. It is not advisable to drill deep holes using this twist drill. Diamond Drill Bit: This particular drill is used in the bathroom for updating or remodeling. It is also used in redesigning your kitchen decoration. Furthermore, it is used on ceramic, glass, tile, limestone, stained glass, marble, fiberglass, porcelain, stone, slate and porcelain tile. When using this drill, the main concern is to obtain water at the edge of the drill bit. Drilling fiberglass may be done with or without water but make sure that the fiberglass has ample amount of water just to get the drill wet. Indexable Drill Bit: This provides an excellent performance in making short-hole drillings. Stainless steel is drilled 3x in diameter and only a short-hole must be done. Listed below are some other types of drill bits Adjustable Bit: This is built with a changeable cutter blade to bore holes of various sizes. It is also used for drilling gaps for wiring or piping. Around-the-corner bit: It is used to cut arched holes that are stretched in corners with a diagonal cutting surface. Auger Bits: This drill creates drill holes in wooden materials. The drill ends have a screw head so that the bits may be self fed. Brad-point drill: This drill looks almost the same as the usual bits but it has sharpened point to make wood drilling a lot easier. This drill has cleaner holes other than spade bits. Counterbore: The drill allows a screw to be driven under the wood outside. The holes that are drilled may be filled with a plug or wire. Drill Saw Bit: It is used to cut holes such as wood and metal and can enlarge current holes. Countersink: A drill that has an angled tip design that forms a â€Å"slump† in the screw head. Fly cutter: This one is often used to cut circles in wood and other soft metals. The diameter of circles may be adjusted by changing the cutter blade setting. Hole saw: It cut holes from one to six centimeters in diameter and has a center bit for directing the cutting blade edge of the saw. Reamer bit: The tapered bit of reamer may be used on existing holes rather than to enlarge holes. Screw pilot bit: This beautiful bit is used for drilling body holes. A pilot hole is used along with the countersink. Wire Brushes: It use to remove rust and to clean up metal and is available either as a wheel or a cup with wire brush. Plastic bit: This is designed with a tip so as to prevent splintering when drilling plastic. It is important to reduce the speed and slowly drill the other side of the plastic. Plug cutter: Use this to remove cylindrical shapes from the wood. It covers the screw using a small cylindrical plate. Tapping:- Tapping is the process by which internal threads are formed. It is performed either by hand or by machine. Minor diameter of the thread is drilled and then tapping is done. Fig. 11 show the tapping processes. Fig. 35 Hand taps and tapping process using tap wrench Fig. 36 Various operations performed on drilling machine Work Holding Devices 1. Machine Table Vice: The machine vice is equipped with jaws which clamps the work piece. The vice can be bolted to the drilling table or the tail can be swung around swung around. Fig. 13 shows the standard and swivel vice. The swivel vice is a machine wise that can be swivel through 360 ° on a horizontal plane. Fig:37 1. Step Blocks These are built to allow height adjustment for mounting the drilling jobs and are used with strap clamps and long T-slot bolts. 2. Clamps These are small, portable vises , which bears against the work piece and holding devices. Common types of clamps are C-clamp, Parallel clamp, machine strap clamp, U-clamp etc.. Fig. 14 shows the correct and incorrect methods of mounting the work piece. Fig:38 11. APPLICATION OF CNC MACHINES ? cutting ? drilling ? milling ? welding ? boring ? bending ? spinning ? pinning ? gluing ? sewing ? routing Its application in some industries like -Automotive Industry Aerospace Industry -Machinery Industry -Electrical Industry -Instrumentation Industry Automotive Industry Different Products Fig:39 Aerospace Industry Aircraft Turbine Machined by 5-Axis CNC Milling Machine Fig:40 12. ADVANTAGES AND DISADVANTAGES OF CNC -Ease of Use ? CNC machines are easier for beginners ? Operation of several CNC machines at same time ? Some CNC machines donâ€℠¢t need any operator indeed call their operator in case of the emergencies. High Efficiency ? operate almost continuously 24 hours a day, 365 days a year. Expanding Options ? Expand the machine’s capabilities with Software Changes and updates. No Prototyping ? new programmers provide elimination build a prototype, save time and money. Precision ? Parts are identical to each other. Reduce Waste ? Reduce waste as errors allows minimize wasted Material. Disadvantage of CNC Machines Cost CNC machinery: ? costs quite a lot more than conventional machinery. ? Does not eliminate the need for expensive tools. ? Expensive to repair. 13. CONCLUSION CNC machines which are applicable any type of processing. manufacturing anything is identical in shorter time. CNC machines provide many advantages. Many industries prefer using CNC machines. How to cite Mini Project, Papers

Cyber Threat Assessment for Emirates Online †Free Samples

Question: Discuss about the Cyber Threat Assessment for Emirates Online. Answer: Introduction Cyber attacks and cyber threats are possibly the most pressing issue that has concerned the cyber-law enforcement agencies around the globe for past few years. Reports of cyber attacks have continued to occupy the headlines of every newspaper worldwide. The cyber law-breakers are always coming up with innovative methods and technologies to cause havoc in the cyber world and keep busy the guardians of cyber security (Singer and Friedman 2014). The agencies that are responsible for the protection of the cyber world are always involved in developing new strategies, methods and technologies to disrupt the actions of the cyber criminals. However, the cyber criminals seem to outdo the protectors every time at every instance (Robinson et al. 2013). This report serves the objective of informing Emirates Airlines regarding the cyber threats that are concerning the cyber vigilantes for the past two years. It also analyses and provides details on the impacts that such cyber threats may have on the organisation and its operations. Finally, the report provides suggestions on possible risk management measures that can be undertaken by the organisation to protect itself from such cyber assaults. Top Global Security Threats The past few years has seen an intense level of activity in cyber attacks around the globe that caused damage ranging from organisational to global. There has been an exponential growth in the frequency of cyber attacks lately. The attacks were carried out with different methods and technology that had different effects and results (Andress and Winterfeld 2013). The global law-enforcement organisations constantly analyse these attacks and compare their complexities with other types of attack. Based on the final report the most threatening attacks are identified every year. In 2015, the top 5 cyber security threats were identified to be ransomware, cyber risk related to the use of Internet of Things, Cyber espionage, Cyber theft, risks in BYOD (Choucri, Madnick and Ferwerda 2014). In 2016, the top 5 cyber threats were identified to be mobile payments and banking hacks, next-generation heartbleed, advanced phishing attacks, cyber election fraud and risks related to cyber insurance (Cho ucri, Madnick and Ferwerda 2014). In the year of 2017, the top five cyber threats has been identified as nation-state cyber attacks, ransomware attacks, distributed-denial-of-service attack, risks related to Internet of Things, Social Engineering and Human Error (Choucri, Madnick and Ferwerda 2014). Therefore, it is evident from the statement above that with the face of cyber threat changing rapidly each year, the list of top cyber threats is also inconsistent. However, some cyber threats are constantly bothering the cyber protectors for the last few years. The magnitude of impact of the cyber threats depend on the type of business it is affecting. In case of organisations dealing in airlines transport business such as the Emirates Airlines, certain cyber threats are identified that can cause the most damage to the business of the organisation. Five greatest cyber threats to organisations like Emirates are as given below. Ransomware Attack The most damage that can be caused to organisations like Emirates Airline is through coordinating a successful ransomware attack. A ransomware is a sort of malware that is designed specifically to prevent access of a user to a computer and demand ransoms in exchange of restoring the system to its previous state (Pathak and Nanded 2016). Most of the airline manufacturing organisations supply completely digitally equipped advanced airlines nowadays. Therefore, all of the airlines that are used by Emirates Airlines are digitally equipped that are used by the pilots to control the aircraft as well as establish contact with the Air Traffic Control (ATC) of the airfields (Brewer 2016). Now if a ransomware attack is coordinated on the organisation that prevents the pilots to communicate with the ATC while landing or taking off from the airfield or prevents them from controlling the aircraft, then the craft can suffer massive accident that can cause large amount of life loss as well as finan cial and reputational damage to the organisation. Risks due to Internet of Things The connectivity of all digital devices to the internet can sometimes prove to be fatal, especially in aviation industries. All the devices that are used in an aviation industry from the airlines to the offices of the organisation needs to stay connected with each other as communication is vital in an aviation business (Jing et al. 2014). In case a cyber attack is coordinated by releasing, a malware within the network to which all the devices are connected that disrupt the communication among the offices and the aircrafts; it can raise many issues from delay in services to compensating the affected passengers (Jing et al. 2014). Phishing Attacks A phishing attack is generally used to retrieve sensitive information from a system that can be used for the benefit of the attacker in another instance. A phishing attack coordinated on the data centres or systems of the organisation can retrieve sensitive official information that can fuel criminal activities at a later instance (Hong 2012). The data may contain details of the aircrafts that are presently used and their conditions and security features that can be used by terrorist or criminal organisations to conduct criminal activities such as hijacking the crafts. This can lead to huge financial loss to Emirates as well as may endanger the lives of many passengers (Hong 2012). DoS or DDoS attacks The purpose of Denial of Service (DoS) and Distributed Denial of Service (DDoS) attack is to deny a user to use the network services by flooding the network with repeated requests and congesting the network traffic (Bhuyan et al. 2013). A DoS or DDoS attack can congest the network in which the organisation maintains communication among its other departments. As a result, the communication will be disrupted within the organisation, which may cause in several operational issues (Bhuyan et al. 2013). Cyber Espionage Cyber espionage is similar to the phishing attack as it also serves the purpose of illegally obtaining confidential information from organisations or governments by using the network (Lewis and Baker 2013). Such attacks can retrieve sensitive information of the organisation like the details of the employees working in the organisation and their bank account details, which can be used for causing potential damage to the organisation or its people in terms of finance and reputation. Methods of Mitigating the Threats To mitigate the threats mentioned above the organisation needs to make certain reforms to the current IT infrastructure as well as implement some new methods and technologies for the same purpose. Initially, the organisation need to use updated systems with latest operating system and software that has lesser amount of bugs that can be exploited by malwares like ransomware to breach the system and take control of the same (Hua and Bapna 2012). The devices that are connected to a network need to have sophisticated security tools implemented so that it becomes difficult for the hackers to gain entry to the devices easily. This will mitigate the risks related to internet of things (Lewis and Baker 2013). The network to which the systems are connected in the organisation needs to have strong firewall incorporated, which will scan and detect any malicious package within the network and prevent it from entering any system. This will prevent attacks like phishing and cyber espionage. The Emirates can consider purchasing an enormous amount of bandwidth in the network of the organisation, which will reduce the possibility of DoS or DDoS attacks (Bhuyan et al. 2013). This is because, the more bandwidth the organisation have the more difficult it will become for the attacker to congest all the network traffic at the same time. In addition to this, the organisation can implement certain software services that provide products that can detect DoS and DDoS attacks. The Emirates can recruit third-party service providers who provide application suites that help in providing complete risk management solutions along with detailed information on the types of threats that can affect the organisation and their impact on the same (Hong 2012). Finally, the organisation needs to train its employees with proper knowledge of identifying the threats and what steps should be taken at the event of a cyber attack (Hua and Bapna 2012). Employee awareness is vital to fighting the threats to cyber security in any organisation. Sometimes, an attempt of cyber attack can be prevented by the timely action taken by an employee who is well informed about the mode of the attack and its preventive measures. Suggestions to Secure the Information Assets of Emirates The Emirates is an aviation industry that stores sensitive business information, which if exposed to cyber attackers, can cause great financial and reputational damage to the organisation. Some information can also fuel future criminal activities. That is why; the protection of the information assets of the company is of utmost priority for safeguarding the interest of the same. Some measures can be taken to ensure the security of the information assets as provided below: Primarily, the data that are stored in the local systems of the organisation need to be protected with digital authentication methods such as with passwords and digital signatures so that the data cannot be retrieved physically in absence of the legitimate user of the system (Peltier 2013). The systems should also be equipped with latest and upgraded security software so that the data cannot be collected remotely. The network must have strong firewall for the same reason (Andress and Winterfeld 2013). Finally, the organisation must avail the services of a trusted cloud service provider to store the data at remote logical storage systems that has advanced cyber defence measures. Cloud storage is one of the most reliable methods of storing sensitive data without running the risk of it being stolen, provided the service provider is legitimate (Pathak and Nanded 2016). The data stored in cloud storage systems are protected with advanced and updated security software and the network through which the data is transferred to the cloud is encrypted with latest encryption technology. Moreover, multiple backups of the data are created and stored in various remote locations, which makes loss of data almost impossible. Conclusion The report reaches the conclusion that an aviation company like the Emirates needs to defend their hard-earned reputation heavily from the cyber attackers whose actions can affect it severely. To do so, the organisation needs to make certain changes as well as undertake certain new measures to fight the threats to cyber security. References Andress, J. and Winterfeld, S., 2013. Cyber warfare: techniques, tactics and tools for security practitioners. Elsevier. Bhuyan, M.H., Kashyap, H.J., Bhattacharyya, D.K. and Kalita, J.K., 2013. Detecting distributed denial of service attacks: methods, tools and future directions. The Computer Journal, 57(4), pp.537-556. Brewer, R., 2016. Ransomware attacks: detection, prevention and cure. Network Security, 2016(9), pp.5-9. Choucri, N., Madnick, S. and Ferwerda, J., 2014. Institutions for cyber security: International responses and global imperatives. Information Technology for Development, 20(2), pp.96-121. Hong, J., 2012. The state of phishing attacks. Communications of the ACM, 55(1), pp.74-81. Hua, J. and Bapna, S., 2012. How can we deter cyber terrorism?. Information Security Journal: A Global Perspective, 21(2), pp.102-114. Jing, Q., Vasilakos, A.V., Wan, J., Lu, J. and Qiu, D., 2014. Security of the internet of things: Perspectives and challenges. Wireless Networks, 20(8), pp.2481-2501. Lewis, J. and Baker, S., 2013. The economic impact of cybercrime and cyber espionage. McAfee. Pathak, D.P. and Nanded, Y.M., 2016. A dangerous trend of cybercrime: ransomware growing challenge. International Journal of Advanced Research in Computer Engineering Technology (IJARCET) Volume, 5. Peltier, T.R., 2013. Information security fundamentals. CRC Press. Robinson, N., Gribbon, L., Horvath, V. and Cox, K., 2013. Cyber-security threat characterisation. Singer, P.W. and Friedman, A., 2014. Cybersecurity: What Everyone Needs to Know. Oxford University Press.

Jimmy Carter Essays (306 words) - Jimmy Carter,

Jimmy Carter Jimmy Carter Economy can always make or break a president. President Jimmy Carter's was a Democrat whose administration, that lasted from 1977-1981, was burdened with a recessive economy from the beginning. Inflation was rising rapidly due to the worst oil embargo United States history has ever witnessed. All of these factors contributed to the national malaise sweeping over Americans. It was Carter's administration that began the process of deregulation and bureaucratic streamlining in hopes of courting moderate factions. He also expressed a desire to move the Democratic Party close to political middle ground to lessen the great divide. President Carter had many failures as well as attributes when it came to foreign policy. On November 4, 1979, in the United States Embassy in Iran, 52 Americans were seized by students who were angry with the Carter administration for allowing Iran's deposed shah into the United States to seek medical treatment. Carter's failure to negotiate their release and a devastating rescue attempt (in which eight United States Marines died) contributed to the nation's waning confidence in him. As well as the Iran hostage crisis, the Soviet invasion of Afghanistan seemed to overwhelm his last two years of his administration, conveying an impression of the United States as weak and feeble. At the cornerstone of his foreign achievements was the accord Carter brokered between Prime Minister Menachem of Israel and President Anwar Sadat, of Egypt, that became known as the Camp David Accords of 1979. Another recognized achievement in foreign affairs was the signing of the Panama Canal Treaty in 1978. Though faced with an unstable economy, Carter succeeded in many other tasks. He managed to become an avid supporter of global peace and human rights. He raised $27 million to build The Carter Center, which envisioned ?conflict resolution? which promoted global peace and human rights.

On the Value of Free Advice

On the Value of Free Advice As a writer I get a steady stream of free advice from individuals who apparently understand my life far better than I. These individuals are mostly strangers, people who contact me Sometimes I get advice And do I heed their advice? Not yet. Probably never. For a writer to heed every little bit of advice she receives, whether from strangers, friends, or even family, is deadly. Writers must learn to eventually heed no advice but that of their own instincts. The marketplace will be the final barometer of how sound those instincts are. And that is the only barometer a writer needs. Martin Seligman, director of the University of Pennsylvania’s Positive Psychology Center, and developer of such concepts as learned helplessness, learned optimism, and authentic happiness, cautions that the only people worth taking advice from are those who have already achieved success in the area in which you aspire to be successful, and who are recognized as experts in their field. To give credence to all the non-experts would be like hiring a carpenter who has never pounded a nail, but has read a few books about how to pound a nail properly, to build your dream house. Or to have your appendix removed As a writer, editor, and writing mentor for the past thirty years, I encourage all my students and clients to adopt this same practice of ignoring the opinions of those who have not demonstrated that they know more about what constitutes good writing than they do. Such proof is not in any way related to the number of advanced degrees the individual holds, but to the success of one’s publications in the marketplace. Back when I was still an aspiring writer, a man I looked up to suggested that my goal of being a writer was unrealistic for someone from the coal fields of rural Pennsylvania. When I wrote my third book, my first literary mystery, I was advised As an aspiring writer, there will always be naysayers eager to deter you. Sometimes they mean well and sometimes they don’t. Does that make a difference in how you should respond? When it comes to free advice, I prefer to remember the words of my very practical father: You get what you pay for. *** Randall Silviss many literary awards include the Drue Heinz Literature Prize, two fellowships from the NEA, a Fulbright Senior Scholar Research Award, and a Doctor of Letters degree bestowed for distinguished literary achievement. His 15th book, the novel Blood Ink, was recently declared a Kindle Scout winner and is available through Amazon. In addition to his novels, screenplays, and essays, he co-hosts a popular weekly podcast at TheWritersHangout.com, and teaches in the Seton Hill University MFA Program. His website can be found at randallsilvis.com. To sign up for Randall’s free monthly newsletter, which includes info about his work and news of interest to writers, send an email to silvisrandall@gmail.com with SUBSCRIBE in the subject box.

Definition and Examples of English Morphology

Definition and Examples of English Morphology Morphology is the branch of linguistics (and one of the major components of grammar) that studies word structures, especially regarding morphemes, which are the smallest units of language. They can be base words or components that form words, such as affixes. The adjective form is  morphological. Morphology Over Time Traditionally, a basic distinction has been made between morphology- which is primarily concerned with the internal structures of words- and syntax, which is primarily concerned with how words are put together in sentences. The term morphology has been taken over from biology where it is used to denote the study of the forms of plants and animals ... It was first used for linguistic purposes in 1859 by the German linguist August Schleicher (Salmon 2000), to refer to the study of the form of words, noted Geert E. Booij, in An Introduction to Linguistic Morphology. (3rd ed., Oxford University Press, 2012) In recent decades, however, numerous linguists have challenged this distinction. See, for example, lexicogrammar and lexical-functional grammar (LFG), which consider the interrelationship- even interdependence- between words and grammar. Branches of and Approaches to Morphology The two branches of morphology include the study of the breaking apart (the analytic side) and the reassembling (the synthetic side) of words; to wit, inflectional morphology concerns the breaking apart of words into their parts, such as how suffixes make different verb forms. ​Lexical word formation, in contrast, concerns the construction of new base words, especially complex ones that come from multiple morphemes. Lexical word formation is also called lexical morphology and derivational morphology. Author David Crystal gives these examples: For English, [morphology] means devising ways of describing the properties of such disparate items as a, horse, took, indescribable, washing machine, and antidisestablishmentarianism. A widely recognized approach divides the field into two domains: lexical or derivational morphology studies the way in which new items of vocabulary can be built up out of combinations of elements (as in the case of in-describ-able); inflectional morphology studies the ways words vary in their form in order to express a grammatical contrast (as in the case of horses, where the ending marks plurality). (The Cambridge Encyclopedia of the English Language, 2nd ed. Cambridge University Press, 2003) And authors Mark Aronoff and Kirsten Fuderman also discuss and give examples of the two approaches this way: The analytic approach has to do with breaking words  down, and it is usually associated with American structuralist linguistics of the first  half of the twentieth century....No matter what language were looking at,  we need analytic methods that are independent of the structures we are examining; preconceived notions might interfere with an objective, scientific analysis. This is especially true when dealing with unfamiliar languages.The second approach to morphology is more often associated with theory than with methodology, perhaps unfairly. This is the synthetic approach. It basically says, I have a lot of little pieces here. How do I put them together? This question presupposes that you already know what the pieces are. Analysis must in some way precede synthesis. (Mark Aronoff and Kirsten Fudeman, What Is Morphology? 2nd ed. Wiley-Blackwell, 2011)

Analysis and critique Essay Example | Topics and Well Written Essays - 500 words

Analysis and critique - Essay Example The side effects, resistance to insecticides in vectors and cost-effectiveness of DDT were discussed (2009). He concludes that though there is limited implementation of DDT alternatives, however, more research needs to be done, as IVM will diminish dependence on DDT (2009, p. 1661). Van den Berg states that, when compared with other insecticides, DDT was once a cost effective method of vector control, however, that does not hold true any longer; even as early as 1998, the cost of DDT and other insecticides became almost equal, with DDT costs ranging from US$1.50-3.00 and other insecticides costing less than US$2.20 (2009, p. 1657-1658). Moreover, recent studies show that the risk of human exposure is great in those living in sprayed houses (2009, p. 1658), however, there is a dearth of such studies, e.g. no peer-reviewed data is available from India which is the biggest user of DDT (2009, p. 1658). Van den Berg points out that though the WHO is reassessing the health risks of DDT, however, progress in this regard is slow (2009, p. 1658). DDT is known to be a persistent molecule and, as such, it takes a long while for it to degrade. It does not run-off either, as it binds itself with the organic matter present in soils and aquatic sediment (van den Berg, 2009, p . 1658). The DDT molecules have been shown to cause a lot of harm in the environment; therefore, there is a need for other alternatives to be explored. Another disadvantage of continuing to use DDT is the insecticide resistance that has been reported in certain species of the vectors. Van den Berg states that though the resistance was developed as a consequence of the excessive use of DDT in the agricultural sector, however, it is further exacerbated by the use of synthetic pyrethroids (2009, p. 1658). Van den Berg has also given a list of certain alternatives to

Role of School Uniforms in Public Schools Research Paper - 4

Role of School Uniforms in Public Schools - Research Paper Example In this respect, unification of school uniform may serve as an appropriate way for mastering of pupils’ management from the perspective of a great many negative aspects caused by schoolchildren’s liberty of expression through clothing. Public schools requiring their students to wear uniforms aids in the elimination of gangs, school violence, bullying, and peer pressure, making it easy to identify intruders, and in the end, the school administration, parents, and student bodies can manage the students effectively. To begin with, it must be said that usage of school uniform as means for getting rid of numerous issues related to personal appearance is a really great way for maintenance of discipline, for there are particular psychologically efficient reasons, which finds their immediate result in a comfortable feeling of both students and teachers. As for schoolchildren, school uniform helps not to feel a difference between pupils of different social classes, since everybody wears clothes of the same quality, price, color, and model. At that very matter, no one stands out from the crowd by other virtue than personal qualities and talents. In fact, there is a beneficial back of such a state when students know that they are all equal and may manifest their individuality only by means of knowledge. Consequently, boys and girls place a bet on receiving of proficient attainments instead of spending plenty of time for preparing for the next school day in the aspect of a time-taking process of clothes choice. Academic progress as a direct result of usage of school uniform may serve as an evident proof of such an advantageous idea. Moreover, in reference to school authority, allowing public schools to mandate uniform wear for their students would aid the administration to enable more time spent on instructional leadership and less time  spent on clothing-related conflicts, in turn making the endless back and forth between child, parents, and school.  

Responsive Web Design Essay Example for Free

Responsive Web Design Essay Ethan Marcotte, author of this original A List Apart article back in 2010, provided us with the concept of Responsive Web Design. Removing the need to develop multiple versions of the same site for different devices, its popularity led to the release of his book. Id like to share with you a few concepts of Responsive Web Design, allowing the content and structure of the website conform to that of the device or browser. Starting any layout, we typically rely on pixels. Measuring the width of our structure from the design document. Ethans concept suggests using percentages. Requiring a little more calculation, but otherwise fairly simple. Now since we do not want to simply shrink everything down, we combine this with the use of CSS Media Queries. These can be thought of as conditional CSS, allowing us to alter the structure as a whole when the browser size drops below a certain size. Check out this article for a more detailed explanation on media queries: http://css-tricks.com/css-media-queries/ Now since images dont adjust themselves into the containing structure like text does, we have to call on the use of JavaScript. We can save out two versions of the image, one optimized for mobile and another for browsers capable of larger sizes and resolutions. The JavaScript is then used to render the image proportionally and at the appropriate resolution. After hearing Ethan discuss this concept at Front-End design conference in 2011, fellow WDD instructors and I found ourselves very excited about it. Now most users do not actively resize their browser as they experience the web, but we found that we disliked that the continual re-render as you do. To this end, Ive created an alternate solution based off of Ethans original concept. Start off by building out your structure at the maximum size. Then, calculate out what the required minimum browser size is in order to view this correctly. Just as in the original concept, you add additional CSS using Media Queries to make adjustments. The difference is that you continue to use pixels instead of percentages. As any item can still be hidden, moved, or shrunk, this allows for a full range of layouts, ones which snap to place at certain intervals, rather than doing so continually. Now some may argue that if the users browser falls in-between these content sizes that screen real-estate is still being wasted. I am willing to concede this point, however feel this is minimal. The avoidance of any unwanted readability issues caused from the auto-format outweighs the negatives.

New Zealand :: essays research papers fc

NEW ZEALAND   Ã‚  Ã‚  Ã‚  Ã‚  The country that I am doing for my report is New Zealand. New Zealand is made up of two Islands. The north and the south islands. It is located in the south pacific by Australia.   Ã‚  Ã‚  Ã‚  Ã‚  The first people to settle New Zealand came over from east Polynesia by canoe during the 10th century. These people were called the Maori. According to a Maori legend, a man may have arrived in New Zealand during about 950 ad, but this can not be proven. The Maori people lived on the Island on native fruits and vegetables and animals, and they also brought over plants and livestock from Polynesia. The Maori were usually peaceful, but sometimes had wars over the best land. They lived in earth-made structures similar to the adobes of Mexico.   Ã‚  Ã‚  Ã‚  Ã‚  The first European to sight New Zealand was Abel Tasman in 1642. The Maori people kept him from landing on the Islands. They attacked his ship by canoes and killed four of his sailors. He never returned to New Zealand. In 1769, an English explorer, Captain James Cook, was sent to New Zealand on a scientific investigation. He mapped all of the north and south Islands and made reports on trade and colonizing. These reports were good and attracted many people to New Zealand, including the French, Italian, and American explorers. By the 18th century, there were 180,000 Maori people on the north and south islands of New Zealand. During 1840, the treaty of Waitangi was signed between the British and the Maori people. It gave the British a right to colonize the Islands and trade with the Maori people. In 1907, the Islands were declared a dominion of Great Britain. In 1935, It was declared an independent country and was named New Zealand.   Ã‚  Ã‚  Ã‚  Ã‚  The present day government and standard of living in New Zealand is very much like that of the U.S. At one time the yearly income of New Zealanders was even better than the U.S. and Great Britain. The people of New Zealand have freedom of religion. The main religion in New Zealand is Christianity, even though there are Jehovah's Witnesses, Muslims, Amish, and many more. The Maori religion is also a major religion. The people of New Zealand have a mix between Britain and Australian accents.   Ã‚  Ã‚  Ã‚  Ã‚  The main exports of New Zealand are wool and dairy products. There are over 100,000 sheep in New Zealand.

Character Analysis on Boxer (Animal Farm) Essay

Horses are well known for their strength and Boxer is no different and he lives up to the expectation of being a strong male horse. Boxer is an almost blind follower to the farm and whoever is in charge of it. His almost unreal strength is a great asset to the rebellion and to the farm as he is capable of working harder than any animal. As soon as he learns about Animalism, Boxer makes himself available to do anything for the rebellion. After the rebellion at the Battle of the Cowshed he proves once again how irreplaceable he is to the farm, as he proves he is a valuable soldier but he shows us that he is a kind and gentle soul as he feels pain when he thinks he has killed the young farm boy. He wakes up early everyday so that he can get more work done around the farm as he gives himself the job of making the farm a better place for his fellow animals. He adopts the maxim â€Å"I will work harder†. This leads him to do great things such as building the windmill twice almost on his own. Unfortunately, Boxer does have the intelligence that we so wish would match his strength (this is clear when he is unable to learn the alphabet past the letter â€Å"D†). He is actually very naà ¯ve and innocent and this leads him to be easily confused and taken advantage of by the pigs and Napoleon. After being taken advantage of many a time, Boxer eventually adopts a second maxim, except this maxim eventually leads to his downfall: â€Å"Napoleon is always right†. Boxer shows devotion like no other to the progression of the farm and this is evident when he collapses as he states â€Å"It is my lung †¦. It does not matter. I think you will be able to finish the windmill without me.† Even when boxer collapses and is close to death, he is still thinking of his work, his fellow comrades and how he can help make the farm better for when he is no longer capable to do more. Sadly for us, Boxer does not seem to grow wiser with age, and even when he is being taken away by the knacker, he needs to be told what is happening before he tries to do something about it. When he realises what’s happening he gets to his feet and tries to kick down the door of the cart but is unable. This is a sad image and a sad end to Boxer as â€Å"there used to be a time when one swift kick of Boxer’s hooves would have kicked down the cart wall with ease†. How fitting is it that such a great animal like Boxer, would be put to death in such a cowardly way and by the animal that he trusted and listened to the most, Napoleon. BOXER’S REPRESENTATION IN REAL LIFE Boxer represents the working class, a person of no great intelligence but very capable and reliable abilities in work that required labouring. He spends his time in the novel helping with the revolution, and then the pigs. Everything he does, he does to the best of his ability, he does this because he knows that his own hard work will result in a better farm for all animals. However, because Napoleon and the pigs view the other animals as workers for their benefit instead of equals, Boxer’s work is never rewarded; when he becomes injured and unable to work, Napoleon sells him to the knackers instead of letting him retire as promised.

Its features and importance Essay

   Picture Gear Studio, DVgate Plus, Sonic Stage Other Giga Pocket PVR hardware and software with TV tuner card with remote control Support Policy One-year parts and labor warranty; 24-hour weekday toll-free support during warranty period. $19. 95 fee for phone support after 1-year warranty. Where is it available? What is its price? The SONY RS530G is available at any high end computer shop and also in the internet. Ordering this Desktop PC through the internet at eBay. com or PCExpress. com would come out cheaper than buying it here in the Philippines. Its price is $ 1850. 00 which leaves me with a total of $150. 00. The excess money I could use for extra accessories for the computer like other software’s may it be for leisure or education. III. Systems Ruled Out Obviously Workstations, Personal Digital Assistant (PDA), Mainframes, Mini-Computers and Super Computers were out of the question while choosing my preferred computer system. I don’t need a very powerful PC that is used for Computer Aided Design (CAD) nor Computer Aided Manufacturing (CAM). I don’t need a computer that would serve up to 70 users because most probably the maximum users that will be using my computer would be 3. Definitely minicomputers are out of my list for one thing they’re phased out. I don’t need a computer that would serve hundred of users at a time; I’m only a student and not a business so mainframes are crossed out of my list too. Besides mainframes are too complicated to handle as it is. Super computers on the other hand are used by businesses for task demanding extreme computing power especially in establishments for science like meteorology and finding out more on enzymes. PDA’s are too small plus it’s not practical for a student like me to buy a PDA just to set my schedule straight in school and take notes. I need a computer that would aid me in my studies just like a Micro computer. Micro computers hold floppy disk drives and CD-ROM drive or even a DVD drive that would help me in storing data need for my classes, reports and papers. It’s the most practical thing to get as of now because if I think of leaving within three years for the UK technology improves quickly and by then if ever I buy a laptop it would be phased out and it would be harder to up grade not like a desktop pc. IV. Conclusion I therefore conclude that at this time, as a student, it would be more practical for me to buy a Desktop PC that would help me in school work and at the same time entertain me for my free time. Laptops are doubled the price of a Desktop PC and is harder to upgrade unlike a Desktop PC. Usually Laptops are used by professionals who are on the go and need computers most of the time to make use of their time. References   Charles S Parker, Understanding Computers: Today & Tomorrow: 200 edition, Harcourt College Publishers www. villman. com   www. Amazon. com   www. eBay. com Note from taken from class   and gathered data from different stores :   PC Express   Stores in Greenhills Shopping Mall   Stores in Cybermall.

5 Ways Bloggers Can Use ReQueue To Save Time On Social Strategy

5 Ways Bloggers Can Use ReQueue To Save Time On Social Strategy Ever spent time sitting at your desk, racking your brain about what to post on Facebook or Instagram for the day? The week? The month? Only to end up sharing something sloppy, rushed, or random to keep your accounts active. It’s true. Finding the motivation to create new posts can be a full-time job. But it’s important to keep your social channels engaging. Because your social strategy keeps your brand top of mind for customers†¦ drives traffic to your blog†¦ promotes your products and services†¦ connects you to your customers and readers†¦ AND helps you drive business ($$$). As a solopreneur or full-time blogger, there isn’t always time to consistently post to your Facebook, Pinterest, Instagram, Twitter, and/or LinkedIn accounts. Cos’ quite frankly you’ve got a lot on your plate (i.e. building your business, caring for your family, showering, personal care, sleep, etc). So, lets eliminate one of them, shall we? Stop stressing out over your social schedule and let ReQueue pick up the slack. With ReQueue’s smarter social automation, you can build a consistent social schedule without dedicating hours of your life to it! Here’s how:👇

African American Heritage In Chicago

African American Heritage In Chicago Essay A History of African American Heritage in Chicago The massive exodus to the north began in 1915; a population of people weary of pervasive hostility and constraint in their former lives, fleeing a social system comprised of miserable oppression and repeated violence. The primary cities for resettlement became New York and Chicago, metropolises humming with the vigor of big-city life and the excitement of a new beginning. When the Chicago Commission asked African American migrants in interviews on Race Relations in 1922 why they came to Chicago, responses were similar. ?Im looking for better wages.? ?I wanted to get away from the South, and to earn more money.? ?I wanted to better my living conditions. ? One man, when asked what his first impression of Chicago was, responded ?When I got here and got on the street cars and saw colored people sitting by white people all over the car I just held my breath, for I thought that any minute they would start something, then I saw nobody noticed it, and I just thought this was a real place for colored people.? And life was good; if not ideal it was better than the disparaging environment of their prior residence in the South. This migration coincided with the War. Job opportunities sprang up everywhere as demand increased for more goods and services, and suddenly in 1920 the Negro population of Chicago had soared from 44,103 in 1915 to 109,594. The Illinois Central Railroad brought hundreds on free transportation, on the premise that they would employ their company. The Negro employment rate skyrocketed; the most popular jobs lying within the iron foundries, food products manufacturing, the tanneries, and the mail order industry. The major ity of blacks coming from the south settled in a limited area known as the South Side. Named the ?black belt of the city,? it was the most concentrated area of the African American population of the time. The difficulty of finding residence in the other parts of the city and the abundance of vacant houses aided in this settlement of the South Side. However, as deep-seated racial prejudice was still running rampant throughout the nation, loud protests erupted and whites quickly abandoned residential areas populated by blacks. Underlying racial hostility between blacks and whites was unfortunately gaining momentum. On July 27, 1919, this animosity was demonstrated in a terrible week of rioting beginning with the drowning of African-American youth Eugene Williams off a Lake Michigan beach. This event was a catalyst for a weeklong violent, bloody warfare. As black workers walked or rode the streetcars west and arrived to begin their shifts at the Stockyards, they were met by angry mobs of white gangs and workers, who attacked them mercilessly and drove them off. The mobs were beyond control. African American community members armed themselves and prepared to defend themselves and their homes against armed white gangs who tore into their neighborhood. The end of the week concluded in death tolls of 23 blacks and 15 whites, 157 persons being injured. The Chicago Commission on Race Relations was established soon after these staggering race riots, to study the roots and causes of the conflict. Their report on Chicago in 1992, with interviews of hundreds of black Chicago citizens, provided an insightful window into the race problem in the North, which attention was being drawn to due to the Great Migration. States the Chicago Commission on Race Relations in the document The Negro in Chicago, ?Both races need to understand that their rights and duties are mutual and equal, and that their interests in the common good are identical: that relations of amity are the only protection against race clashes; that these relations cannot be forced, but will come naturally as the leaders of each race develop within their own ranks a realization of the gravity of this problem and a vital interest in its solution, and an attitude of confidence, res pect, and friendliness toward the people of the other race. READ: Recycling Essay? The conflicts between blacks and whites have since subsided a great amount, but residue from the memories of violence and hatred still prevails. It will be a momentous day when we can be united as one indiscriminate, unbiased race, but that day has yet to come.

Research Design Assignment Example | Topics and Well Written Essays - 1250 words

Research Design - Assignment Example The rapid rate of change in United States causes a growing concern among government officials, the public and health professionals. I believe these changes are issues of concern and should be well addressed. A research dilemma refers to the â€Å"situation that causes a researcher to feel apprehensive, confused and ill at ease† (Wood and Kerr, 2011). In essence, a research problem is something that bothers a researcher and can only be resolved through research. In a research procedure, the recognition of a research problem is the most fundamental step. It is for this cause that the entire process should be dedicated to this stride. A research problem should be clearly stated. Aldrich and Wedgewood (1970) identify their problem as the identification of changes that affect the health of the youth and children. There is need to understand the forces that affect the health of the youth and children. In reference to Aldrich and Wedgewood (1970), this is essential as it permits the people to â€Å"anticipate the future and lead to a systematic health care program with adequate feedback and adaptability to accommodate the health needs of children and youth†. Such a research problem will help in changing the country’s social structure, economy, and technology. ... g demand for a â€Å"more efficient and extensive system for delivery of medical care†, education and multiple of conflicting voices in resolution of these complex issues are the five forces that have affected the health of children and the youth. In this rapidly changing society, Aldrich and Wedgewood (1970) recons that medical science needs to be advanced to be at par with the changing society and â€Å"advance in systems to enhance and support the practice of medicine†. On the other hand, American society has high expectations that improved health care should be availed to them. Over decades, people had been sensitized on taking responsibility for their health and to say, this public education had great impact on the people. The society anticipates benefiting from the new up-and-coming drugs, complex new equipments and technology and skills and dexterities of surgeons. There has been a growing demand for a more competent and widespread system for delivery of medicina l care to people. Aldrich and Wedgewood (1970) note that this high demand is â€Å"giving rise to the evolution of a system that brings together the complementing skills of various medical and nonmedical professionals and a system that knits together numerous health facilities in each society to make quality medical care more available†. In recognizing the shifting scenery and size of demand for health personnel, different educational institutions have risen to the challenge. However, the institutions have not yet â€Å"provided an effective interrelated program that ensures the supply of the required skills† (Aldrich and Wedgewood, 1970). Bremner (1974) asserts that though there have been suggested measures to improve the health care for the youth and children, â€Å"there is multitude of conflicting voices