The Abrasive Jet Machining Engineering Essay

The coarse r of e real last(predicate) timese lightning-black Machining Engineering EssayAbrasive rave machining is a kind of blasting subprogram and one of the most aspirant micro machining routine for hard and brickle worldlys like grouches and ceramics. Metal is re sackd ascribable to the erosion ca apply by impact of naughty speed petulant super acid. Abrasive Jet machine has precision X-Y axis rigidly mounted to the cutting table and it has programmable Z axis with snob assembly. According to the proper envision calculations we posterior select different components of Abrasive Jet mould.In this project, I develop the exercise using different dog-iron packages like AUTO CAD and SOLID WORKS. Moreover I also explain the effect of several AJM operating parameters like haulage distance, size and suit of unsmooths on metal removal rate of AJM. I explain how we can maximize the talent of AJM by controlling their parameters. In this model c ar has been taken t hat use less fictive component rather than directly procuring them because sometimes we find less verity in fabricated component so per public figureance of machine can be low.Introduction of Abrasive Jet MachiningMaterial removal processes is a circumstances of manufacturing process and it can be divided into two major groups. One is accomplished machining processes and anformer(a) is Non- conventional machining processes. Different fibers of Conventional machining processes are Milling, Shaping, Drilling, Slotting, Boring, etc. And the examples of Non Conventional Processes are Abrasive Jet Machining (AJM), Electro-Discharge Machining (EDM), Laser Beam Machining (lBM), Abrasive Water Jet Machining (AWJM) etc..Abrasive jet machining also called, Abrasive Micro blasting, it is a strong removing process and natural is removed by a focused steam of abrasive particles carried by high impel gas or pains. A fine abrasive particle strikes on fail surface by dint of schnoz and the material is removed by erosion by the high velocity abrasive particle.AJM is used principal(prenominal)ly to cut materials that are really sensitive to heat deterioration and thin sub voice of hard materials that chip easily and it is also used to cut multiform shapes and clutters which are more difficult to produce by other processes.Equipments of Abrasive Jet MachineCUsersVishalDesktoppart01.jpgA lay knocked out(p) of Abrasive Jet Machining is shown in fig. Abrasive particles are fed from the hoper into the mixing chamber. High pressure direct or gas (such as Carbon Di-oxide or Nitrogen) used as carrier gas is supplied to the mixing chamber which containing abrasive powder and vibrating at 50 c/s. with the help of pressure regulator we can control the gas time period and pressure. The high pressure air/gas entrains the abrasive particles and this mixture comes out from refined rostrum at high velocity. This stream of abrasive particles strikes on the surface of sco re- meet and cut the material.The abrasive stream is directed to the function small-arm locations by nozzle, which may be manually positioned or mounted in some designed fixture for automatic operation.For automatic operation, cam sweats, tracer mechanism or pantographs used to automatically position either nozzle or take form function.Abrasive Jet Machining MechanismCUsersVishalDesktopAjm find out up 3d.jpgIn this process energizing postcode of abrasive jet is strike on the surface of go piece and so it transposes into pressure energy. If pressure energy is more than the yield competency or tensile strength of compute piece material then material cast downs cut.List of Components of AJMAbrasive Delivery System ( Including Hopper)Pressure Regulator nimbus filter valveMixerNozzleSuitable arrangement to manipulate the work pieceElements of Abrasive Jet MachineThere are three main elements of AJMNozzleAbrasiveCarrier gasThe above mentioned three elements of AJM influenceM aterial removal rate and accuracy of machiningNozzle wear rate rear roughnessGeometry of cutVariables in Abrasive Jet MachineThe process can be easily controlled to vary the metal removal rate which Depends on following variables.Nozzle design ( mean Shape of nozzle such as circular, square)Distance between the nozzle and work pieceInclination to the work surfaceType of abrasiveSize and shape of abrasiveFlow rate of abrasiveType of carrier gasesVelocity of abrasive jet endure piece materialNozzle design Nozzle must be resistant under different conditions like pressure and kinetic energy of jet and common materials used for nozzle are due west carbide and synthetic sapphire. Pressure losses at the end of nozzle should be low.Distance between nozzle and work piece Standoff distance affect on material removal rate of AJM. Material removal rate is increase if we increase standoff distance up to certain limit and then fall gradually. Small standoff distance gives better penetration of abrasive particle into the work piece and large standoff distance might cause flaring. Successfully experiments show that effective standoff distance is 0.8mm.Types of abrasive Aluminum oxide is preferable abrasive in majority of application and silicon carbide abrasive also use in certain cases. Abrasive size also prominent factor in AJM. shell results have been obtained with a abrasive size in the range of 10-50 m.Abrasive Flow Rate Maximum material removal rate is achieved with a flow rate at 8-18 g/m. Increase the flow rate above the normal range for a particular nozzle design results in demean stream velocity thus decrease the material removal rate. It is advisable to use acceptable flow rate to conserve abrasives and increase the nozzle life. perforate size Abrasives with smaller grain size have high density which may cause chocking problem of nozzle. General grain size use in AJM is 10 to 50. Fine grains are used for polishing and deburring. Coarse grain size cut faster and cut deeper also.Work piece material Abrasive jet Machine is generally used for machining brittle material like ceramics and glass and effect of MRR is depends on hardness of material if hardness is high then MRR is low and vice versa.Advantages of Abrasive Jet MachineLow capital costLow power consumptionAbility to cut intricate shapes in high hardness and toughness materialAbility to cut fragile and heat sensitive material without damage because no heat generated and overall forces are lowThe part produced is free of bursIt is flexible process from design point of viewTooling time is substantially reducedBoth faces of work piece can be machined simultaneously.Disadvantages of Abrasive Jet MachineIt is slow process since metal removal rate is very slow.Larger floor topographic point is infallibleSkilled operators are motifedSharp corner cannot be producedHigh manufacturing costMaterial onerousness that can be machined is limitedAbrasive grains can stick into soft material so cl eaning is requiredHigh wear rate of nozzleThe process tends to pollute the environmentApplications of Abrasive Jet MachineRemoving flash and parting lines form the injection molding machineDeburring and polishing plastic components like nylon and TeflonFrosting interior surface of glass tubesEtching marking on glass cylinderHigh quality surface can be easily producedGlue, paints can be removed effectively form paintings.Different Components of Abrasive Jet Machining set upAbrasive Delivery SystemCNC Control SystemPumpNozzleDifferent query System of NozzleCatcher plateAbrasive Delivery SystemModern abrasive delivery feed system do not need a vibratory feeders and other metering valves.For smooth and precision cutting operation we need to have fixed and continuous abrasive flow rate.Now long time we use opening metering system metering system which is very reliable and extremely repeatable.During machining set up, once we measured the abrasive flow rate through orifice we can ente r that value in control computer programmed and then no adjustment or further tuning of abrasive flow is ever be required.Bulk abrasive delivery system is mounted with the wheel and it is also easy to move and this kind of system is use compressed air to transport garnet from the bulk abrasive hopper to small hopper attached with the machine.Features can hold approximately 550lbs abrasiveCan be located 20 feet away from the Abrasive Jet machine.Height and Width are of following 1320mm and 960mmCan handle minimum pressure 80 to 95 psi.How it whole shebangAbrasive particles are stored into the hopper and abrasive container has one inlet and one outlet for air passage.The flow rate of abrasive is controlled by rotational speed of motor. payable to rotation of cam, abrasive container gets vibration.The abrasive particle is delivered by rotation of cam and motor arrangement.CUsersVishalDesktophopper 3d.jpgCUsersVishalDesktopAbarsive hopper.jpgControl System for Abrasive Water jet Machin eMost of abrasive piddle jet machine equipped with the CNC control system.G code programming is installed in CNC machine.But the limitations of the G code command is that feed rate is held at constant speed and feed rate varies only for some regions like curves and corners.Another limitation of G code restraint is that is used for rigid cutting tools.Abrasive water jet machine is not a kind of rigid cutting tool.Every time adjustment the feed rate for curves and corner results in uneven cut.So by considering various parameters like parameters of nozzle and intricate shape of part and variable thickness of the work piece and materials going to cut help to determine the feed rate so that operation can be through smoothly.For that we have to lay the control algorithm which compute the desired feed rate based on the above parameters.By using G code we can convert this feed rate mechanism into a actual programming.This programming help to drive the servomotors and that controls the X Y execution and this way we can flummox part with more precision.PumpTwo type of pumps used in the Abrasive water jet system. One is Crankshaft pump which was used in old engineering buy nowadays for high pressure cutting technology intensifier pump is used.In this hydraulic power pack system is a type of positive displacement pump.This system drives the intensifier.Hydraulic power pack system is controlled by microcomputers to set up the pressure etcElectric motor is used to drive the hydraulic pump and as the hydraulic fluid push the large cylinder which generate the high force on small cylinder and this small cylinder pressurize the water at the level which is proportional to the cross segment area of larger cylinder to the small cylinder.NozzleHigh pressure water flows into the nozzle and cutting detail of nozzle which comprise of an orifice and mixing chamber and an insert where water jet mixed with the abrasive and form an abrasive water jet.Various deed of the nozzle is controlled by transaction system across the material.CUsersVishalDesktopnozzle01.jpgHow water jet FormsTypical diameter of the nozzle is 6mm. High pressure water is then fed into the pipe which can carry the water at 400 Mpa and consisting of different joints without any leakage between them.When water passes through the orifice flow of water convert onto narrow jet and orifice diameter is usually about 0.2 to 0.4mm.When water enters into the cutting head section pressure head of water is converted into velocity head.Velocity of water can be evince as Vw = 2Pw / w.Where Pw is the pressure of water and w is density of the water.The orifice usually make of sapphire and life of the orifice is about 100-150 hours.From orifice narrow water jet passes through the small section vacuum is created in mixing chamber and that pulls abrasive particles and air into the mixing chamber.Abrasive particles are feed through the different techniques like Vibratory drum roll or Belt feeder.Mixi ng ChamberMixing tube is the section where abrasive particles mixed with the water jet.Focusing tube generally made of tungsten carbide because of its good abrasive resistance characteristics.Focusing tube has inner diameter typical about 0.8 to 1.6mm and continuance of 50 t0 80 mm.To get the maximum accuracy we have to replace the mixing tube frequently. We can replace it when allowance goes below the acceptable level.Numerical modeling of Mixing process can be described as of followIf we consider some energy losses at the water jet formation at the end of orifice then water jet velocity described as of following wayVw = (2Pw/ w)Where is Velocity coefficient of the orifice.Volume flow rate of water can be show as followingQw = x Area of orifice x Vw= x /4 do x (2Pw/ w)= Cd x /4 do x (2Pw/ w)Where = co efficient of Vena ContractaCd = Discharge co efficient of orifice.So total power of the water jet can be evince byPw = Qw x Pw= = Cd x /4 do x (2Pw/ w)Due to the loss occur in the mixing process both pulsation and energy is not conserved. But assumed that no looses occur in momentum at initially.So ( x v) before = ( x v)After(airvair + wvw + ava)before = ( aivairr + wvw + ava)AfterAs we realize that air has very low density so momentum of air, before and after are neglected.Consider one more assumption and is that after mixing abrasive particle has same velocity of water and also neglect the momentum of abrasive then above equation can be expressed bywvw = ( w + a) vawSo vaw = (1/(1 + R) x vwWhere R is the dispatch factor = a/ wDuring mixing process momentum losses occur due to the friction between the abrasive particle and inner wall of focusing tube and collision between the abrasive particle and water jet so for time being consider momentum losses and then equation is described byV aw = x (1/(1 + R) x vwWhere is the momentum loss factor. communicate SystemMotion system can be designed in many ways according to the enquiry of nozzle a round a work piece.This mechanism provides excellent operating conditions for the operator.CUsersVishalDesktop3dTable 3Imagetable1.jpgMaterials are loaded with the help of overhead crane or fork aerodynamic lift truck to the tank.This mechanism is utilitarian for 5 axis tables and also provides pretty much space to the vertical tilted axis.This structure has restriction to the movement of nozzle that means movement of nozzle has limitation to twist and long distance between the table and work piece result in error due to the deflection of machine.In this type of mechanism, Nozzle is mounted to the Y axis carriage.CUsersVishalDesktop3dTable 3Imagetable 2.jpgY axis is moving beam and is mounted with the X axis.Back beam is supported at the two ends.This mechanism is suitable for very large machine.CUsersVishalDesktop3dTable 3Imagetable 3.jpgIn above mechanism, nozzle is very cosy to the plane of work piece which pick at static and dynamic errors while operation is going on.This sys tem is not suitable for manually material loading and this provide material loading is friction match to the access of the tank.Cost estimation ( Bill of material)ItemCost per single itemNo of items requiredTotal cost linear motion imbibe ways hsr30cm$3853$1155Precision Ball bed$1883$564Supporting Unit$1443$432Frl unit of measurement air filter$481$48Diamond nozzle for long service life$9001$900Abrasive hopper with 90lb capacity$1321$132Other accessories$250$250Total$3481Material remotion rate Mechanism and Modeling in Abrasive Jet MachiningAs we discussed earlier, material removal rate takes place in abrasive jet machining because of the erosion of the work material and erosion take place due to the high impact of jet velocity strikes on the work piece.Following assumption has been considered in mechanism of Material removal rate.Shapes of the abrasives are spherical and abrasive particles are rigid.Kinetic energy of the abrasive particles is fully used in removing material of the work piece.Erosion takes place in brittle material due to the brittle fracture and the volume of fracture is considered as hemispherical with the diameter which is equal to length of the indentation.CUsersVishalDesktopGeometry.jpgCUsersVishalDesktopPart2.jpgFrom the geometry of the erosion of materialDE = DF + EFEF = r = DE DFr = (dg/2) (dg/2 H) = -H + dg H dg Hr =Volume of the erosion of material is equal to the volume of hemispherical crater and is given byTB = 2/3= 2/3 x (dg H) 3/2As we know kinetic energy equation is given by mv so the kinetic energy ofAbrasive particle grit is given byK.Eg = mg V= /12 x dg g VWhere V = Velocity of Abrasive Particleg = Density of Abrasive backdg = Diameter of Single Abrasive Gritmg = Mass of Abrasive GritWhen Abrasive particle strikes on Work piece material, work piece will be subjected to maximum forces which cause the erosion of material which I indicated in figure by symbol H.Therefore work done is given byW = x F HImpact force F is give by F = Indentation Area x hardness of the materialW = x r H SAnd Work done is equal to Kinetic energy because we assumed that kinetic energy is fully utilized for material removal soW = Kinetic energy K.E x r H = = /12 x dg g VSo H = (dg g V)/ (6rS)= dg V (g/6S) 1/2Now material removal rate of brittle material can be expressed as of followingMrrB = TB x No. of strikes by abrasive grits per second N= TB x (ma/ /6 dg g)= (6TB ma/ dg g )Now Put the value of TB = 2/3 x (dg H) 3/2= 6 x (2/3 x (dg H) 3/2) x ma / ( dg g )= (4 ma g) x (H/dg) 3/2As we know that H = dg V (g/6S) 1/2So MrrB = (4ma/ g) x (dgV/dg) 3/2) x (g/6H) 3/4= (4maV) 3/2 / (63/4 x g1/4 x S 3/4)= (maV3/2) / (g1/4 x S3/4)Fabrication and Assembly of Abrasive Jet MachineNozzleA standard length of cylindrical rod typically made of Tungsten Carbide or Synthetic Sapphire or MS was cut into the proper length based on the requirements by using power hack saw.By tour process in Lathe machine we can reduced the diameter of cylindrical rod and bring up to 15mm.On same lathe machine we can make tip by Taper turning process by tapering one end of cylindrical rod.Then make a blind hole of 20mm on planner face of rod by using 12mm drill bit in drilling machine.Due to the tool tip angel, a shape of 118 degree formed at the end of blind hole.To get the 1mm of Tip of nozzle, we can use the 0.74mm drill bit in Drilling process.CamMild mark of 40mm diameter can be used as a raw material of Cam.Turning process is used to bring down the diameter up to 35mm.By using power hack saw we can get the required width (Approximate 25mm).Then both cut faces can be machined in Milling Machine.Through hole can be made by 16mm Drill Bit in Drilling Machine.Abrasive ContainerAbrasive container usually made out of the hollow cylinder.On the both end of container two Cast Iron plates were welded.On the top plate, two iron pipes fitted through the holes.There are two pipes in a system, one is inlet which is longer and makes more agitation of abrasive particles and outlet pipe is shorter.Compressed air goes to the abrasive container through inlet pipe and mixed with the abrasive particles then mixture of Air and Abrasive forward to the nozzle to perform operationVibrator AssemblyAngel section is welded with the base plate by welding process.Induction motor is placed on the angle section which is parallel to the base plate.Induction motor is tighten with the gather and bolt with base plate.Cam is fixed with motor shaft and Abrasive container is connected to the rod and it is freely to rotate around the rod.CUsersVishalDesktopVribator.jpgDesign info and Technical Specification of Various ComponentsX-Y TableX -Y table is prominent part of the abrasive water jet machine. Various fixturing arrangements have to be provided to hold the work piece while operation is running.The travel of X-Y table has been decided based on the application.Table consists of two parts. One is upper plate and some other one is lowe r plate.Upper table travel in X direction and lower table travel in Y direction.Based the model of Omax 2626, table can travel 730mm x 660mm.Y Axis is responsible for movement of work piece in Y direction.Other components of X-Y are of following.Linear motion calculate wayRecalculating ball screwSupporting unit for ball screwCouplingsNuts and boltsOther components as requiredLinear motion subscribe to wayGeneral application of linear motion guide is for the linear motion.Based on the different parameters like travel length, floor space requirement, type of equipment being used, linear motion guide way is selected.With the help of different rollers which provide rolling elements between the rails and block off we can get higher precision linear motion system.Frictional losses are reduced between the elements by restraint effects between the rails and block and it can withstand high load in any directions.Assembly of Linear motion Guide waySource Hiwin linear motion guide way catal og_G99TE13-0809CUsersVishalDesktopl m guide way.JPGL M Guide way with DimensionsStructure of linear motion guide wayAs shown in fig, each raw of balls have angle interlocutor 45 degree. Retainer plate has facility to hold the recalculating ball screw which guide linear motion guide way in directions.End plate is attached with the linear motion blocks which allow the balls to circulate.Side seal is placed between the row of balls and skank nipple is attached with the end plate.Linear motion guide way can achieve precise motion by setting up the section height smaller as much as possible based on the requirements and also provide rigidity of the model.Compare to all others traditional slides, co efficient of friction of linear motion guide way is 1/50 th.Advantages of linear motion guide wayProvide high accuracyInsufficient lubrications in traditional slides give errors in accuracy and in linear motion guide way frictional contact is rolling contact so it has little wear and therefo re it has long life.Due to small frictional resistance a small driving force required to move the load and hence it provides high speed of motion.Provide Equal loads capacity in all four directionBest advantage is the fungibility of the parts.Ball ScrewBall screw assembly for linear motion guide way consists of screw and cockamamy.Helical threads or grooves provided between starters and screws and balls are rotate between them.Ball return system provides the way to return the balls again that means when ball reach at the end of the nut it return through the return pipe.Ball nuts in ball screw assembly determine the fatigue failure in the system and ratios of descend of threads in ball nut to the number of threads on ball screw decide the wear out.By considering the table length, calculation of X axis and Y axis ball screw length is determined.For our table our X axis ball screw length should be 730mm + 200 mm (Breadth for upper table) + 100mm allowances for below cover so it sho uld be 1030mm.For Y axis table it should be 660mm + 200mm + 100mm so it should be 960mm.Based on the ball screw length, rail length is determined and which is 50mm larger than ball screw length.CUsersVishalDesktopball screw.JPGBall screw AssemblySupporting UnitsBall screw supported mien are designed with the high bearing stiffness par to other conventional bearing.Two kinds of supports are available fixed end support unit and supported end support unit.In fixed end support unit can take all thrust by given work and in another support end support unit acts like usual bearing.Nut bracket is used to bolt the ball screw nut with the work load platform.Vertical motion ModuleVertical motion module comprise of all above components like L M guide way, Pipe holder , Ball screw assemble, supporting units, nozzle holder and nozzle etc.This assembly is used for adjustment of stand of distance between nozzle and work piece.CUsersVishalDesktopVerticle motion module.jpgFixture arrangement for wo rk piece in Abrasive Jet MachineAs abrasive jet machine is used for various kind of applications that also result in various fixture arrangement of work piece based on the application.So not only one application can use for the applications.Usually Abrasive jet machine requires less fixturing equipment to get start the operation so combination of different components can be used for particular kind of work.Fixture is used to locate the work piece correctly and for quick loading to reduce the machining cycle time.To prevent undesirable movement or rotation of work piece while the work piece is under the process.When work piece is under the processes, high pressure of water and abrasive strikes on the work piece so it can move in sideways or lift up those results in errors.Most of abrasive jets are used to make flat parts or add some features to the existing parts. So for all kind of flat parts 3 parameters has to considered and which are X position , Y- position and angle of rotation with respect to X-Y point.Figure shows the fixture arrangement of work piece for flat parts using square and clamps.As shown in figure parts are lying on the slats and clamping is provided to prevent the side motion of work piece because slats do not provide better support to the work piece.A square plate is bolted with the tank. As shown in fig. Screws which are close to the work piece is a clamping screws and which are far from the work piece for the square to adjust the different thickness of material. This system is used to prevent the rotating motion of slats.Comparison of Abrasive jet Machining process with other ProcessesAbrasive Jet machine Vs Laser Beam MachiningComparison with respect to the material can be cut Abrasive water jet can cut varieties of material with good conditions compare to laser beam machining. For refractory materials, laser beam machining has shortsighted applicability whereas abrasive water jet has good applicability for same materials.Capital cost a nd abrasive water jet set up is very low compare to Laser machining.There is no heat produce in Abrasive water jet marching so it minimize the thermic distortion of material also minimize the secondary operation because it provides continuous or uniform smooth surface with little burr on the surface.As the thickness of the work piece increase, higher precision can be obtained by abrasive jet machine with the same or higher tolerance than laser.Abrasive water jets are safer compare to laser machining and abrasive jet nozzle is very simple than laser however life of nozzle is about 100-150 hours of operation.However there are some disadvantages associated with the abrasive water jet process while compare with the laser machining like tool wear is very low and power consumption also very low in laser machining as abrasive water jet has little high compare to laser.Abrasive water jet machine or Abrasive jet machine Vs. EDM.EDM has low applicability for the material like super alloys whe reas abrasive water jet machining has good applicability of the same materials.Abrasive water jet machining has facility to make piercing in the parts by itself while EDM process has required pre drilled hole.There is no heat affected zone so this process eliminates secondary operations.Good capabilities to make large parts with stinting cost.Rapid software programming which is very simple and less set up with fixturing make this machine considerable to buyers.It can work better in any kind of materials like conductive or non conductive.If the thickness of work piece is less than the 25mm or 1 inch, abrasive jet machine works five to eight times faster than the EDM but less precise as well.Abrasive water jets Vs PlasmaMaterial removal rate efficiency of plasma machining is very low compare to the abrasive water jet machining.Plasma machining is not preferable to refractory material while abrasive water jet machining applicable to wide range of materials.Abrasive water jet provides b etter edge finish than plasma machining process but plasma machining process is faster than the Abrasive water jet process.Abrasive water jet Vs. MillingMilling can be used for rapid production if set up is already done and fully programmed whereas abrasive jet machining has rapid programming feature and if operator is well trained than set up do not required for the part.Minimal burring problem, less scrap, environmentally friendly, no oil soaked chips are the reasons of abrasive jet machining which replacing milling process in machine shops.

Oral Glucose Tolerance Test Report

Oral Glucose Tolerance Test ReportJason TaylorIntroductionGlucose is a simple sugar that provides nearly half of the bodys energy, it piece of tailt be eaten directly thus it is obtained from eating foods that contain carbohydrates. The liver stores about 1/3 of the bodys total glucose in the form of animal starch while energy cells store 2/3 of glucose in the same form (Whitney Rolfe, p99). The amount of sugar present in the pipeline is cognize as the course sugar, these levels need to be tightly regulated by the body (Jiang Zhang 2003). Eating food causes an increase in blood glucose levels, this stimulates insulin unveil from the pancreas into the blood stream, insulin stimulates glucose expenditure into cells, stimulates liver and muscle cells to store it as glycogen and so the excess glucose is converted into fat (Whitney Rolfe, p99). Low blood glucose levels atomic number 18 stimulated by the glucagon drop off from the pancreas, this causes the stored glycogen to be converted to glucose which causes an increase in the blood glucose levels (Whitney Rolfe, p99).Diabetes Mellitus is a group of disorders that have glucose in gross profit margin in common, fibre I and type II diabetes be the most common. Type I diabetes mellitus is when the cells dont produce enough insulin and its symptoms include excessive thirst and urination, lethargy, unexplained weight loss and wounds that bring to slowly. Type I diabetes is due to the loss of beta cells in the pancreas which are responsible for the secretion of insulin (McCance Huether, pg745). There have been two types of type I diabetes identified, type 1A is an autoimmune disease in which environmental and genetic factors trigger the destruction of beta cells. Type 1B is non-immune and its when individuals having varying amounts of insulin deficiency (McCance Huether, pg746). Type II diabetes mellitus is little common and is when cells dont respond to insulin, genetic factors much(prenominal) as a lack of insulin receptors combined with environmental influences like obesity can publication in the pathophysiologic mechanisms for type II diabetes like decreased insulin secretion and insulin resistance. These are crucial for the development of type II diabetes mellitus (McCance Huether, pg750).There are numerous complications associated with diabetes such as hypoglycaemia, hyperglycaemia and diabetic ketoacidosis. hypoglycemia is when theres low levels of glucose which is damaging as the brain and nervous system rely on glucose to function. Hypoglycaemia can be caused by too much insulin, strenuous physical exertion or inadequate food intake (Munter Spiegelman, 2007). Impaired glucose regulation can lead to hyperglycaemia which is abnormally high levels of glucose in the blood, for this to occur at least 80-90% of the beta cell function have to be compromised (McCance Huether, pg758).Carbohydrates need to be broken down into monosaccharaides before they can be absorbed. Their digestion begins in the mouth when salivary amylase hydrolyses them to shorter polysaccharides, they then progress to the stomach that doesnt play a role in carbohydrate digestion however its low pH inactivates the salivary amylase (Whitney Rolfe, p101). The small intestine is where most of the digestion occurs, pancreatic amylase breaks down the polysaccharides to monosaccharides which are then absorbed (Whitney Rolfe, p103).A glucometer is used to calculate the concentration of glucose in the blood, a small drop of blood or a specimen is placed on a disposable strip which is inserted into the glucometer which calculates the blood sugar levels (Whitney Rolfe, 2013). An oral glucose tolerance test (OGTT) is used to detect diabetes mellitus, there are accepted minimum and uttermost values for glucose levels in blood (mmol/L) to be within, if they are beneath or exceed them it could indicate a diabetic profile.In this report we investigated the presence of glucose in urin e samples as well as the BGL in prepared samples to determine if any of the patients showed a diabetic profile.MethodsMost of the methods were followed as stated in RMB2530 Pathophysiology 1 Laboratory Manual, 2013 however due to safety and health issues real blood and urine samples were not taken.Results slacken 3 Class Glucose Tolerance Test Results (Mary)Table 3 Class Glucose Tolerance Test Results (Alex)Graph 1 Blood Glucose Vs. Time for Mary and AlexDiscussionMary had a normal OGTT result as her blood glucose levels didnt have a dramatic increase and they decreased efficiently as well. Marys blood glucose rose at 30 minutes (6.06 mmol/L) however the liver responded to the extra glucose by releasing insulin which promoted the uptake of glucose by cells and its storage as glycogen (Rubin Strayer, pg680). Alex had an impaired response to glucose as his glucose levels rose at 30 minutes and kept rising till 60 minutes, his highest glucose reading was 16 mmol/L while Marys highest was 6 mmol/L. From 60 minutes onwards Alexs blood glucose exceeded the maximum range acceptable for blood glucose levels. At 60 minutes his blood glucose was 17.16 mmol/L while the maximum accepted range is 8.9 mmol/L. This indicates a diabetic profile as a normal response is insulin release by the pancreatic beta cells that regulate glucose uptake in liver and skeletal muscle. The delayed decline in glucose suggests that the beta cells arent producing glucose or that the cells arent responding to the insulin (Rubin Strayer, pg1090).The liver is the primary organ involved in glucose homeostasis responding rapidly to fluctuation in blood glucose levels. The reason that there is an increase in blood glucose is due to the consumption of food. Eating foods causes an increase in blood glucose, this stimulates the release of insulin by the pancreas which is responsible for stimulating glucose uptake. Excess blood glucose is utilised by the body and stored as glycogen in liver and skeleta l muscle while excess glucose is converted to fat (Whitney Rolfe, p99). During periods of starvation or fasting, there is a lack of glucose. Low blood glucose levels are stimulated by the glucagon release from the pancreas, this causes the stored glycogen in the liver to be converted to glucose which causes an increase in the blood glucose levels. The conversion of glucose to glucose is known as glycogenolysis, gluconeogenesis is formation of glucose from non-carbohydrate sources such as amino group acids and fatty acids and is utilised during fasting periods. Symptoms of patients with diabetes mellitus include excessive urination and thirst, lethargy, headaches, dizziness, mood swings and leg cramps.Type I and II are the most commonly known diabetes forms however there are other types. Some people dont have high enough blood glucose levels to be classified as diabetes, however since they are not normal its known as impaired glucose metabolism or pre-diabetes. There are two pre-dia betic conditions impaired glucose tolerance (IGT) and impaired fasting glucose (IFG). IGT is when glucose levels are not high enough to be classified as diabetes, however they are still high while IFG are when blood fasting glucose levels escalated during fasting states but are yet again not high enough to be classified as diabetes. Gestational diabetes is a high blood glucose level during pregnancy as a result of the hormones, it usually goes away after the babys birth. Excessive thirst with bad amounts of diluted urine is known as diabetes insipidus (DI), it occurs in two forms central diabetes insipidus (CDI) and nephrogenic diabetes insipidus (NDI). CDI is due to an ADH deficiency, ADH or anti-diuretic hormone is responsible for retaining water. NDI is when the kidneys or nephrons are insensitive to ADH.Glycosuria is the presence of glucose in the urine, glucose is usually filtered back into the bloodstream by the kidneys. Untreated diabetes mellitus is due to elevated glucose levels which leads to glycosuria. Filtrate pass through sieves in the kidney walls and energise reabsorbed in to the blood. Damage to the filters results in filtrate excretion into urine. Urine sample A belonged to Alex and was positive for glucose as it changed from blue (negative) to dark green (+). Urine sample B belonged to Mary and it was negative for glycosuria. Alexs positive urine sample could be due to his elevated glucose levels.Any differences between individual results could be attributed to a number of contrary reasons, there could have been errors during the glucometer readings such as contaminating the glucometer stick. There could have been errors made during the pipetting of the stock glucose and water resulting in a different concentration to what was required. The experiment should be repeated again to add validity to the results.Overall the experiment followed scientific expectations, the patient with diabetes mellitus was identified through measurement of the blood glucose levels as well as testing of a urine sample. The experiment should be repeated again to add validity to the results.ReferencesTortora, GJ, Funke, BR, Case, CL (2010).Microbiology An Introduction. 10th ed. San Francisco Pearson genus Benzoin Cummings. 318, 586, 587, 710.McCance, KL, Huether, SE, Brashers, VL, Rote, NS (2010).PathophysiologyThe biological Basis for Disease in Adults and Children. 6th ed. Missouri Mosby Inc . 296, 1684.Rubin, R, Strayer, DS (2012).Rubins Pathology Clincopathologic Foundations of Medicine. 6th ed. Baltimore Lippincott Williams Wilkins. 332, 346, 348.Jiang, G. Zhang, B.B. 2003, Glucagon and regulation of glucose metabolism,American journal of physiology. Endocrinology and metabolism,vol. 284, no. 4, pp. E671-678.Whitney, E Rolfes, S (2012).Understanding Nutrition. 13th ed. Australia sore Zealand Yolanda Cassio. Pg95-101.

Impact of Dumping and Agricultural Subsidies on Developing Countries

Impact of Dumping and Agricultural Subsidies on Developing CountriesThe term subsidy is lots utilise in the economic context, further the concept behind it fails to take on been defined appropriately for every(prenominal) practical purposes. The term is more or less often used synonymously with disposalal transfer of m unmatchabley to an entity in the offstage sector, or it may refer to the provision of a good or service at a impairment be lowly what a occult entity would another(prenominal)wise consecrate had to pay for it. Moreover, it may also refer to various presidential term policies that may favorably affect the competitive position of private entities, in the jump of procurement policies or programs to educate workers. Ambiguity continues to prevail with respect to the aforementioned measures as subsidies in the meaningful sense of the term.1Governments engage in a wide range of tax and expenditure policies that impose be and confer avails on entities belongi ng to the private sector. To an economist, perhaps a natural phenomenon for identifying subsidization is a hypothetical market equilibrium with come on organisational bodily process. The classic economic models of general competitive equilibrium, for example, ar intact decentralized and embody no political science sector.2The disposal confines an entry by way of taxation and expenditure policies, this alters equilibrium prices and output. Activities for which the net re whirls are reduced are discouraged to some degree, and those activities are then subject to be taxed. Activities for which the net returns are enhanced go out be encouraged to a degree, and they may be said to be subsidized.The difficulty with this concept of subsidization is that it is exceedingly difficult to apply as a practical matter. The hypothetical market equilibrium without government can non be observed, and indeed is not clear(p) that the concept is coherent. Implicit in the classic general equil ibrium models is a capacity for actors to engage in transactions, in so far it is difficult to see how such a capacity can arise in a large economy without a government to create seat rights. Further, the deviations from any benchmark equilibrium that termination from government activity are exceedingly complex. Governments engage in a wide variety of taxation practice, not only are the number of tax instruments large in number, scarce the incidence of the various taxes is often quite un legitimate. Governments also engage in immeasurable regulatory programs that impose costs on private entities of various sorts in the form of occupational health and safety programs, environmental quality programs, programs to transfer resources to certain disadvantaged groups, and untold others. Finally, government expenditure programs provide vast benefits to private sector entities in count on and indirect ways, including public education, highways, research and development funding, low cos t insurance, fire and credentials services, a legal system, and on and on.Against this backdrop, it is surely impossible in practice to ascertain the precise r apiece of governmental activity on any entity according to the sort of benchmark put forth above. The simplest alternative is to seem at each government program in isolation, and to ignore the question of whether any benefits conferred may be offset by costs in another form. If a particular program confers benefits on a private entity, a subsidy is declared to exist without further inquiry.Further it is plausible to assume that generally applicable tax, expenditure and regulatory policies affect al or so destroyprises around in equal standards and thus do not confer any form of subsidy. Programs of narrow applicability that target benefits at particular industries, by contrast, tycoon be assumed to confer benefits that encourage production in that industry. To illustrate, a government might make an investment tax ref erence book available to all industries that use durable goods, on the premise that all industries benefit about equally and that any affects on world(prenominal) competitiveness wash out done exchange rates, such a program might be ignored for purposes of identifying subsidies. By contrast, if the automobile industry is the beneficiary of a special tax credit program for investment in automobile manufacturing, a subsidy might be found as to that industry.Yet another alternative is to focus on the impact of government on private activities relative to the impact of other governments on as closely situated entities elsewhere. In the international context, one might look for programs that seem to confer particularly large benefits on particular entities relative to the benefits that governments confer on similar entities in other countries. The presumption would be that roughly governments tax and regulate in somewhat similar fashion, resulting in similar effects on the competiti ve position of most private entities only when a program for a particular group of private entities stands out as especially generous relative to such other programs would a subsidy be present. Thus, for example, if most governments provide a certain range of benefits to their farmers, those programs might be presumed to pay off a cancelation affect in international concern more or less, and no subsidy would be found.Each of these alternatives have obvious deficiencies. The first has the virtue of simplicity, but its essential failing has been noted above by ignoring the offsetting costs imposed by government on private actors it raises a great danger that subsidization ordain be found where a private entity has not been meaningfully advantaged by government programs. Indeed, because so many government programs are funded out of general r purgeues, a narrow focus on particular government expenditure programs without any offset for various forms of taxation would lead to the con clusion that there is rampant subsidization.The second alternative deals with the insuperable complexities of calculating the net impact of national governments on domesticated industries which are avoided by assuming that generally applicable programs have a neutral impact while targeted programs do not. scarcely there is no reason to believe that this assumption is correct. Many broadly applicable programs have widely disparate effects on different industries.The triad alternative brings out another dimension, and treats subsidization as an alteration in the competitive position of private entities relative to similar entities elsewhere. This shift in ferocity perhaps captures the notion that subsidization involves tilting the playing field, and might be defended on that basis. This assumption has congenital practical problems the presumption that most governments tax and regulate similarly with respect to background factors that affect the competitive position of private en tities is highly suspect, and the mere fact that a particular type of program exists in one country and not another, or is more generous in one country than in another, is at best a weak marker for a program that shifts the competitive balance overall.In sum, it is far easier to conceptualize a subsidy in simple economic models that it is to identify a subsidy in practice. Any administrative rule for determining whether a particular government program is in relation to subsidy or not will result in serious errors of over-inclusion and under-inclusion.The OECD, which estimates artless subsidies, uses a broad definition that includes any government polity that distorts the market such that prices do not reflect peripheral costs. So a tariff on imports, which taxes consumers by raising the price of imported country products to benefit producers, is a subsidy, just like a direct payment to a farmer. That however is not the common understanding of a subsidy. Their definition is narro wer, referring only to government payments that allow prices to remain below marginal costs. few are direct, such as payments to farmers others are indirect, such as government support for irrigation infrastructure, which allows producers to exclude that cost from their prices. The OECDs Producer Support Estimate (herein after PSE) is the most widely used estimate of the rude subsidies provided to the farmers on the developed countries.The PSE has been challenged by the developed nations on the grounds that the twain-thirds of the estimate is comprised of not the direct support provided to the farmers but rather what is referred to as the non-subsidy support. This component of the PSE includes the market price support which is essentially the tariffs, price support and quotas. Despite the fact that none of these are subsidies per se insofar he OECD figure tries to calculate the dollar estimate of this figure and incorporate it in the PSE.3Dumping An OverviewIn economics, put a way can refer to any form of predatory pricing, and is by most definitions a form of price discrimination. However, the word is now generally used only in the context of international wiliness law, where cast out is defined as the act of a manufacturer in one country exporting a product to another country at what may be perceived as an unreasonably low price, usually meaning below the costs of production. The term has a negative connotation, but advocates that resign markets see dumping as beneficial for consumers. When these subsidized goods are exported to foreign markets it can be referred to as dumping.4More than 40 components of the World Trade system of rules (herein after WTO) are now active users of antidumping policy, and create countries are the newest and most frequent users. However many development countries have started using antidumping to limit imports, thereby having given up other forms of flexibility in pile policy by adopting WTO disciplines and agreeing to bind their tariffs. Despite antidumping policys escalating use by developing countries, relatively wee is known about which industries within developing countries are using antidumping and how they are using it. chthonic the WTO Antidumping negotiate, any member that uses the policy must create an administrative procedure to investigate demands for antidumping protection. Firms in an industry that seek this form of import protection must overcome the organizational challenges of free riding in pasture to initiate and successfully pursue an antidumping legal proceeding. Before a government can impose a definitive antidumping import restriction, the accord also requires that its administrating self-assurance solicit and collect considerable economic evidence to confirm that market conditions and behavior of foreign exporters satisfy technical, WTO mandated legal criteria. Nevertheless, given that antidumping has become many WTO member governments protectionist instrument, th e resulting pattern of antidumping import protection across industries may be an increasingly important indicator of these countries overall patterns of import protection.While the four historical developed-country users of antidumping the US, EU, Canada and Australia have continued to be active users under the WTO, they are no longer the dominant users as they were during the prior decade (1985-1994) under the GATT regime. A sizable bundle of the spheric use of antidumping, at least as measured by the frequency of initiated cases and imposed measures, is now made up of new user developing countries such as Argentina, Brazil, Colombia, India, Indonesia, Mexico, Peru, Turkey and Venezuela, the nine developing countries forming the sample of our formal empirical investigation.5WTO and the Agreement on AgricultureAn attempt to regulate the protection afforded to the farmers in the developed countries and the tariff rates in the developing countries through the Agreement on Agricult ure which is an international treaty of the World Trade presidential term. It was negotiated during the Uruguay Round of the world-wide Agreement on Tariffs and Trade (herein after GATT), and entered into force with the establishment of the WTO on January 1, 1995. This AoA is based on troika concepts or pillars which are domestic support, market doorway and export subsidies.However not a great deal has changed since the AoA was implemented. The document hinged precariously on eliminating agriculture subsidies as a basic step in getting the pecuniary house in order. Knowing well that any reduction in subsidies would be politically suicidal, the developed countries dole outd to not only maintain the level of subsidies but in fact succeeded in increasing it manifold. At the same time, they continue to arm-twist the developing countries to reduce tariffs and open up markets for farm goods from the industrialized countries. As already stated, the developed nations often believe th at the PSE is not an accurate indicator of the amount of the protection afforded by them and have repeatedly challenged this statistic. In this paper the researcher will analyze the subsidies given to the agricultural sector in the developed nations, its impact on the developing nations and the role played by the WTO in duologues between these two blocs.C h a p t e r 1 A g r i c u l t u r a l S u b s i d i e s a n d D u m p i ng in t h e D e v e l o p e d N a t i o n sWidespread dumping by the Developed Nations The WTO Antidumping Agreement and the Theory of Endogenous Trade Policy January 1, 2005 marked the 10-year anniversary of the World Trade Organizations Agreement on Agriculture (AoA). When governments launched the agreement, they hailed it as a victory for farmers around the world farmers were to benefit from more trade, greater doorway to markets and higher prices. A decade later, there is unquestionably more trade in agricultural products. However, higher and fair price s for farmers seem further away than ever. It is hard to make the case that the Agreement on Agriculture has done anything to benefit farmers anywhere in the world. Since the WTOs inception, widespread agricultural dumping, the selling of products at below their cost of production, by global agri care companies based in the United States and European Union has wreaked havoc on global agricultural markets. Hit hardest are the farmers in the developing and the least developed nations who have been forced to go out of business because of these policies.The Institute for Agriculture and Trade Policy (IATP) has documented export dumping from U.S.-based multinational corporations onto world agricultural markets for the last 14 years. The U.S. is one of the worlds largest sources of dumped agricultural commodities. The latest update shows that the US still undertakes large scale dumping the five most commonly exported products namely wheat, soybean, corn, cotton and rice. Though the statis tic shows that the amount of dumping has gone down as compared to the previous statistic but this is perceived to be largely as a result of the reduced supply because of bad last and pest infestation than as a change in policy.6The proliferation of WTO-authorized antidumping laws and the global increase in use of this form of administered import protection has been widely accepted (Miranda, Torres and Ruiz 1998 Prusa, 2001 Zanardi, 2004). While antidumping was once a policy instrument used primarily by the US, Canada, EU and Australia, it is now used actively by over 40 WTO member countries. To develop a theoretical motivation for our empirical analysis of the determinants of antidumping use by industries in developing countries, we proceed in two steps. In the next section we describe the WTO Antidumping Agreement, which sets out the general rules for national administration of antidumping law as well as the technical evidence necessary for a government to justify imposition of a ny new antidumping measure. Given the political-economic environment created by the WTO Antidumping Agreement, in section we use the theory of endogenous trade policy to generate additional testable predictions for the econometric analysis.The WTOs evidentiary requirements for national use of antidumpingSince the 1947 GATT, the rules of the international trading system have authorized countries to establish national antidumping statutes and to implement antidumping trade restrictions.7During the Kennedy and Tokyo Rounds in the 1960s and 1970s, negotiators attempted to put more structure on the GATT antidumping rules, but countries adopted the resulting Antidumping Codes only on a plurilateral basis. The 1995 inception of the WTO and its Antidumping Agreement (WTO, 1995) provided more detailed guidance for countries to implement and administer antidumping laws.8First, because the Antidumping Agreement was part of the Single Undertaking, it established a common set of basic rules that would apply to all WTO members and be subject to the enforcement provisions of the WTO Dispute Settlement Understanding (DSU).9Second, relative to the GATT, the WTO Antidumping Agreement did impose more structure on the evidentiary requirements for a government to implement a new antidumping measure, although those requirements still allow for substantial government discretion and are at best questionable from the perspective of economic welfare.Under the Antidumping Agreement, a national government must undertake an investigation and consider substantial economic evidence before it can impose a definitive antidumping measure that restricts imports. The investigating authority is instructed to consider a number of factors when making its decision, but most critical among them are whether two important legal criteria have been met that a domestic industry suffers material injury and that this injury is the result of dumped imports.The domestic industry provides evidence of dumping t o the national governments antidumping authority by present that prices of competing products sold by foreign exporters in the domestic market were lower than the normal value of the product (WTO, 1995 Article 2.1). The national government authority has substantial discretion in calculating the normal value benchmark with which to compare the export price. The benchmark can be determined by any of three methods i) the price for sales of the same good in the exporters home market, ii) the price for export sales of the same good in a third market, or iii) a constructed measure of the exporters average cost.10Dumping in the United states Dumping by U.S.-based corporations is possible because trade good production is badly managed. The 1996 and 2002 U.S. Farm Bills have produced a vast structural, price-depressing oversupply of most major agricultural commodities. This oversupply has driven prices down. Both the 1996 and 2002 Farm Bills were driven by efforts to make them compliant wi th WTO rules. The result has been the institutionalization of agricultural dumping by U.S. farm policy. U.S. farm subsidies are frequently blamed for agricultural dumping, yet they are only a symptom of a much deeper market failure. The sharp increases in agricultural dumping in the U.S. can be traced to the 1996 U.S. Farm Bill, which stripped away already weakened programs that were designed to manage supply. These supply management programs helped to balance supply with demand, ensuring a fair return to farmers from the marketplace. The pre-1996 commodity programs in effect set a floor price that commodity buyers had to pay farmers. Given the structural imbalance in market power between farmers and agribusiness corporations, the government traditionally intervened to ensure competitive markets and prevent anticompetitive business practices.11In 1996, the U.S. government abandoned intervention mechanisms at the behest of agribusiness lobbyists, supported by free trade economists. T he result U.S. agricultural prices went into freefall. Without the supply control programs and other interventions, commodity buyers were able to drive prices below the costs of production and leave them there. To prevent the collapse of U.S. agriculture, Congress then set up counter-cyclical payments to make up part of the losses resulting from the Farm Bill reforms. The U.S. now has very expensive farm programs that distort market signals while doing nothing to correct the deeper distortion inherent in the unbalanced market power between farmers and commodity buyers and processors.12The event of dumping in itself does not pose a major problem for the international community but what has been a constant source of concern is the widespread damage that has caused to the developing countries.13The researcher shall devote the next two chapters of this project to establish the damage that have been caused all around the world because of dumping by the developed countries and the mechan ism employed by the WTO to counter this problem and how far that has been successful.C h a p t e r 2 T h e I m p a c t o f D u m p i n g a n d A g r i c u l t u r a l S u b s i d i e s o n D e v e l o p i n g C o u n t r i e s.Ten years after the World Trade Organization (WTO) came into existence, and some 20 years after the holy grail of economic liberalization for more open markets and less government intervention in the developing world based on the idea that economies must grow if poor people are to reap the benefits of globalization, the tragedy is that the process of economic liberalization may already have set poor communities back a generation.14No where has the impact been more severely felt than in the agricultural sector.Conventional lore has it that the agricultural sector is heavily subsidized in most developed nations. Whatever difficulties may arise in determining the net impact of government on industries in general, most observers seem to agree that agriculture is a net beneficiary of government largesse.It is ironic that the one sector considered to be the most subsidized is subject to the least degree of discipline on subsidies (among goods markets). As noted, both export and domestic subsidies are generally permissible under the WTO Agreement on Agriculture, though subject to negotiated ceilings and some reduction over time.The absence of tight discipline on export subsidies is unfortunate for the reasons discussed at length earlier. export subsidies are almost certainly a source of economic distortion, and indeed the agricultural sector affords a case study of how pressures for competitive subsidization have led trading nations down the road of mutually run offful expenditures.The resistance to the elimination of domestic farm programs is likely a source of economic waste as well, for much the same reason that any form of protectionism is a source of waste. But as indicated in the discussion of evasive subsidies, it is hardly clear th at protection through subsidization is any worse from an economic standpoint than other forms of protection. Thus, if the political equilibrium is such that agriculture must be protected, domestic farm programs may be no more troublesome that border measures.One objection that might be tabled to the continued coexistence of domestic farm programs and protective border measures for the same commodities (assuming that protection is inevitable) is that multiple protective measures complicate trade negotiations. If country A wishes to bargain for access to the agricultural markets of country B, it is harder to evaluate the benefits of a tariff concession from country B in the face of a subsidy program that also protects farmers in country B. The added transaction costs of negotiation in the face of multiple instruments of protection can be avoided by channeling all protection into a single, transparent policy instrument-this is the essential rationale for efforts in the WTO/GATT system toward tariffication of all trade barriers.Yet, the prevalence of domestic farm programs suggests that border measures alone are inadequate to the task of achieving the anticompetitive purposes compelled by current politics. One fill only look at the United States, which is a net exporter of many agricultural commodities, to realize that import restrictions may do little to ensure politically acceptable prices or rates of return to the producers of certain commodities.Thus, perhaps the best that can be done is to schedule all the protective policies, both subsidies and tariffs, and bargain over both simultaneously to achieve limits on their magnitude. This is the approach of the Agriculture Agreement, and one might reasonably hope that sequential rounds of negotiations over these protective instruments in the agricultural area will produce gradual liberalization, much as the sequence of negotiating rounds under GATT brought great reductions in the tariffs applicable elsewhere.There is also something to be said for the effort in Annex 2 of the Agriculture Agreement to favor subsidies that do not encourage output. To the degree that subsidies are being granted for reasons that do not relate to the correction of an externality, programs that confer financial benefits on the intended recipients without inducing an expansion of their output may create fewer distortions. The caveat, of course, relates to the first harmonic problem of identifying subsidies in the first instance-an output-expanding subsidy might counteract some distortion associated with other tax and regulatory policies. But in the agriculture sector, where most observers believe that net subsidies are present at the outset, efforts to channel farm aid into programs that do not stimulate agricultural production may make good sense.Subsidies to the producers of goods and services lower the producers costs of production, other things being equal. This reduction in their costs of production can lead t o an expansion of their output in two ways, depending on the nature of the subsidy. First, some subsidies depend directly on output-the subsidy program may provide a producer with $1 for each widget that it produces, for example (or $1 for each widget that it exports, the classic export subsidy discussed below). Subsidies that increase with output in this fashion are economically equivalent weight to a reduction in the shortsighted marginal costs of production for the producer that receives them. In general, producers will respond to a reduction in short-run marginal costs by lowering price. Of course, when price falls, the quantity demanded by buyers will rise and output will expand to meet the increased demand.Second, even where the amount of the subsidy is not contingent on output and does not affect short-run marginal costs of production, subsidies can affect long-run marginal costs in a way that causes additional productive capacity to come on line or to remain on line. For e xample, imagine an marginal troupe that is unable to cover its variable costs of production at any level of output, and would thus shut down its operations under usual circumstances. A subsidy to that caller that is contingent on it remaining in business can avert a shut-down in operations-it must simply be enough to allow the company to cover its variable costs at some level of output. Likewise, a subsidy can buzz off a company to build new capacity to enter a market when the judge returns to entry absent the subsidy would not be high enough to induce entry.It is also possible, to be sure, that a subsidy will have no impact on the output of recipients. Imagine, for example, that a government simply sends a company an unexpected check for $1 million. The money is in no way contingent on the companys output, or on it remaining in business. The owners of the company will be pleased to receive this subsidy, of course, but there is no reason for them to change their operations in a ny way-whatever level of output was most economic without the subsidy will also be most profitable with the subsidy.These observations suggest another important issue that must be confronted in conceptualizing subsidies. For a government program to confer a subsidy, must it encourage an increase in output by the recipient? If it does not, then it cannot tilt the playing field in a way that causes detriment to competing producers. But if this question is answered affirmatively, it becomes necessary to inquire whether the government program in question affects marginal costs in the short run, or has an effect on long-run marginal cost that is sufficient to cause capacity to remain in production when it would exit otherwise, or to enter when it would not otherwise. Such issues are not always easily resolved.15The adverse effect of Dumping Dumping in amongst the most harmful of all price distortions developing country agriculture, vital for food security, rural livelihoods, poverty red uction and generating foreign exchange, is crippled by the competition from major commodities sold at well below cost of production prices in world markets. The structural price depression associated with agricultural dumping and a dual effect on the agricultural structure of the developing countries. Firstly, as a result of the below cost imports the farmers are driven out of their domestic markets. If the farmers do not have access to a safety net of subsidies and credit, they have to abandon their land. When this happens, the farm economy shrinks, in turn shrinking the rural economy as a whole and sending rural people into trade-related migration. Second, developing country farmers who sell their products to exporters find their global market share undermined by the policy of a depressed global price. The cascading effects of dumping are felt around the world in places as far apart as Jamaica, Burkina Faso and the Philippines.16The effect of Dumping on Indian Agriculture The libe ralization of the Indian economy initiated during the early 1990s was launched with a view to accelerating agricultural growth by ending discrimination against agriculture. The idea was to turn the terms of trade in favor of agriculture through a large, real devaluation of the currency and increase in output prices of agriculture. An exponential growth was expected which was to have a significant impact on poverty reduction and thereby have a positive impact on livelihood security of hundreds

The Buddha, Two Lessons Essay -- essays research papers

Almost everybody I have ever met can recognize a Buddha statue, still few folks who I have ever associated with understand the meaning of the Buddha. Myself included was one of those folks blessed with such ignorance. When the term Buddha was brought up, all I thought about was the pudgy bellies of myself and fellow offensive lineman on my high school football team. Nirvana Hey isnt that one of the great joggle bands of the early nineties? Right? In this paper, I will explain who the Buddha was and the deep meaning of the message that Prince Guatama preached.The Buddha defined the Middle Path as a way that leads to insight, which leads to wisdom, which conduces to calm, to knowledge, to the Sambodhi, to Nirvana (76). These words meant that all else was linked to some sort of suffering, that square(a) peace and happiness could only be achieved through your mind and true pain and suffering could be achieved through reality. The Buddha illustrated this idea through his Four Noble Tr uths.The first of these is the Noble Truth of Suffering. These sufferings included natural situations of life, including birth, decay, death, presence of objects we hatred not to obtain what we want, and finally, mere existence (76). There is a pattern that is developed in this order. Birth is the beginning of reality that has its good as substantially as bad times. The Buddha appears to focus on the hardships of reality that Prince Guatama knew of in this world. As life would carry onward, the hardships woul...

We Cannot Permit Infringements on Privacy Essay -- Privacy Essays

George Orwell foresees a nightmarish-future for the world in his book 1984, where individualism loses precedence to the good of society, and with it goes the individuals personal life. The controlling Party in the socialist government knows the intimate details of all citizens, and prosecutes those who victimize social orders through ventureing speech, behavior or thoughts. The omnipresent ocular warning long Brother is Watching You, reminds citizens that no personal information is safe from the Thought Police. While this may seem far-fetched to some, Orwell envisioned technology facilitating governments shame of power in 1950 in the twenty-first century, progress has left ones private life susceptible to interested parties in both the public and private sectors. In 1997, Ralph Nader cautioned, The people ar not organized not equipped with the knowledge, tools or skills to confront the invasions of the self they can see, let alone the far greater, more later(a) kinds of surve illance (viii). With the cosmetic surgery of computers to their current capabilities, collecting, storing, accessing and overlap personal data has become easier than ever before governments and companies no longer keep files of paper records on individuals, which accessing, thievery or sharing would be too arduous a task, but rather electronic databases that they can easily create, access and link. Ellen Alderman and Caroline Kennedy note in their book The duty to Privacy, From a privacy point of view, we are in the midst of the most unsettling period in the computer revolution (326). Computers do not threaten personal privacy, though, nor violate any right granted to Americans the word privacy does not appear in the Constitution, nor does the p... ...rmation Center. Double Trouble with the DoubleClick/Abacus Merger. March 21, 2000.McWilliams, Brian. Netscape Navigator Browser Snoops on Searches. Newsbytes. March 7, 2002. purpose Pay Dirt in Scannable Drivers Licenses. New York Times, March 21, 2002 http//www.privacy.orgNicholson, Jonathan. Account Info Sought to Combat Terror. Reuters, February 26, 2002.Electronic Privacy Information Center. annotation Track.Electronic marches Foundation. Analysis of the Provisions of the USA Patriot Act. October 31, 2002. American Civil Liberties Union. USA Patriot Act Boosts Government Powers While Cutting bandaging on handed-down Checks and Balances. November 1, 2002.Additional Sources Freedom of Speech, The EU Data Protection Directive and the Swedish Personal Data Act. June 9, 2000.Online Privacy Alliance. Privacy Initiatives by the privy Sector. We Cannot Permit Infringements on Privacy Essay -- Privacy EssaysGeorge Orwell foresees a nightmarish-future for the world in his book 1984, where individualism loses precedence to the good of society, and with it goes the individuals private life. The controlling Party in the socialist government knows the intimate details of all citizens, and prosecute s those who violate social orders through threatening speech, behavior or thoughts. The omnipresent visual warning Big Brother is Watching You, reminds citizens that no personal information is safe from the Thought Police. While this may seem far-fetched to some, Orwell envisioned technology facilitating governments abuse of power in 1950 in the twenty-first century, progress has left ones private life susceptible to interested parties in both the public and private sectors. In 1997, Ralph Nader cautioned, The people are not organized not equipped with the knowledge, tools or skills to confront the invasions of the self they can see, let alone the far greater, more subterranean kinds of surveillance (viii). With the rise of computers to their current capabilities, collecting, storing, accessing and sharing personal data has become easier than ever before governments and companies no longer keep files of paper records on individuals, which accessing, stealing or sharing would be too arduous a task, but rather electronic databases that they can easily create, access and link. Ellen Alderman and Caroline Kennedy note in their book The Right to Privacy, From a privacy point of view, we are in the midst of the most unsettling period in the computer revolution (326). Computers do not threaten personal privacy, though, nor violate any right granted to Americans the word privacy does not appear in the Constitution, nor does the p... ...rmation Center. Double Trouble with the DoubleClick/Abacus Merger. March 21, 2000.McWilliams, Brian. Netscape Navigator Browser Snoops on Searches. Newsbytes. March 7, 2002.Finding Pay Dirt in Scannable Drivers Licenses. New York Times, March 21, 2002 http//www.privacy.orgNicholson, Jonathan. Account Info Sought to Combat Terror. Reuters, February 26, 2002.Electronic Privacy Information Center. Bill Track.Electronic Frontier Foundation. Analysis of the Provisions of the USA Patriot Act. October 31, 2002. American Civil Liberties Union. USA Patriot Act Boosts Government Powers While Cutting Back on Traditional Checks and Balances. November 1, 2002.Additional Sources Freedom of Speech, The EU Data Protection Directive and the Swedish Personal Data Act. June 9, 2000.Online Privacy Alliance. Privacy Initiatives by the Private Sector.

Peirce, Virtuality, and Semiotic :: Pierce Virtual Virtuality Essays

Peirce, Virtuality, and Semiotic The adjective virtual, practically unheard-of a few years ago, has without a doubt become the number bingle buzzword of the nineteen-nineties. Virtual reality has become a catch phrase for the interactive multimedia technologies that have supplanted desktop publishing at the cutting acuteness of personal-computer graphics technology. The virtual communities which for years have flourished in comfortable obscurity on the Internet, have recently been thrust into the glare of publicity as commercial-grade gateways have opened up the net to the public, while virtual corporations have transformed the world of business.Yet the word virtual is nothing new although its ubiquitousness is new, as is perhaps its current meaning or meanings. In his admirable glossary of cyberterms, the philosopher Michael Heim defines virtual as A philosophical term meaning not in reality but just as if, and he notes that the term in this sense goes back to the thirteenth-ce ntury philosopher John Duns Scotus. (1) The word virtuality may have been first used to light upon interactive computer systems by Theodore Nelson (the inventor of the term hypertext), who proposed this definition, in 1980 (2) By the virtuality of a thing I mean the seeming of it, as distinct from its more than concrete reality, which may not be important. ... I use the term virtual in its traditional sense, an opposite of real. The reality of a characterization includes how the scenery was painted and where the actors were repositioned between shots, but who cares? The virtuality of a movie is what seems to be in it.While this may at first blush seem equal to Heims later definition, Nelsons definition is in fact somewhat more specific and represents a significant meaning shift from the traditional sense, as becomes clear when we pipeline it with the definition offered in 1991 by the media philosopher Paul Levinson. Paraphrasing Levinson slightly, we may say that he defines a v irtual X as what you get when the information structure of X is detached from its physical structure. (3) Levinsons examples include virtual - i.e. electronic - classrooms, libraries, and books, and these certainly do not have the run across and feel of actual classrooms, libraries, or books. As I have noted elsewhere, the two definitions coincide in the case of virtual reality - the information structure of reality as a whole includes its look and feel - but this is a coincidence the two definitions represent different concepts.

Characters as Portrayed Through Themes and Images in The English Patien

Characters as Portrayed Through Themes and Images in The English Patient While the four main characters of The English Patient are extremely powerful, and definitive to the readers judgement of the story, they cannot stand alone without the patterns of imagery, symbolism and parable which underpin the text, and offer a complexity which extends beyond the literal level. These patterns reveal information about to each one character, and provide significant links between characters and ideas which lead to a greater understanding of the novel. Likewise, the plot would have little impact upon the reader were the novel not so densely coloured with these patterns of imagery, symbol and metaphor amongst which skin, hands, mapping and the elements are particularly important. A metaphorical idea which resonates throughout the novel, and is present in alone of the characters (particularly the English patient and Caravaggio) is the concept of man as a sort of communal Book, whereby every aspect of his life, and his relationships with others are mapped onto him. This also operates literally, through the obvious markings of scars on the English patient, and in Caravaggios case, the loss of both thumbs. ...his black body, beginning at his destroyed feet... ahove the shins the burns are worst. Beyond purple. Bone. This description of the English patients body is brainsick and confronting it addresses the theme of pain, the construction of identity, and of course the physical evidence of his tortured past, which the reader learns more about as this imagery develops. It is almost as if his body is a landscape a war zone onto which all evidence of suffering is mapped. Imagery... ...o mirror the horrors of the wa rin which these four people are involved. The themes explored through the elements in particular, are complex and contradictory, just as the elements are themselves. Sometimes harsh, sometimes cleansing, and almost always painful, t hese elements shape the characters and plot, and reside in much of the imagery explored in the novel. The techniques of symbolism, metaphor and imagery develop the novels themes of love, war, suffering and identity, which inform a reading of the novel which would not be as powerful through use of characters and plot alone. The justness and eloquence through which these themes are explored really inspire thought and reflection in the reader, which in turn credits a more complex understanding of the novel. Work Cited Ondaatje, Michael. The English Patient. London Pan Books, 1993