...chemicals Plastics Fluid Process chemicals Specialty chemicals Kathon 886 MW Thayer School of Engineering Agricultural chemicals Petroleum chemicals Kathon MWX 11/4/2010 Background 3 Metalworking fluid: 60 million gallons in the US Biocides kill microorganisms in metalworking fluids Product name Treatment capacity Market potential Sale Volume Actual sale during 1st five month Thayer School of Engineering K 886 MW K MWX 1,000 gal 50-100 gal reservoirs $18M $20M $5.4M (1983) $0.2M (target in 1984) $2.1M $12,000!!! 11/4/2010 Optimistic Prospects for MWX 4 Great market potential ($38M) Maintenance biocides likely to gain market share Several advantages: • Easy to use • No maintenance • Safe • Higher effectiveness • Large customer surplus Thayer School of Engineering 11/4/2010 ... But it doesn‘t sell! 5 Lack of need recognition for biocides Lack of brand awareness among end consumers Lack of MWX awareness Lack of awareness of the benefits of MWX Lack of incentives for distributors to sell MWX Thayer School of Engineering 11/4/2010 End-User EVC of Kathon MWX 6 Compare costs incurred by end-user who does and does not use Kathon MWX Not Using MWX Using MWX Fluid Concentrate Purchase $ $ Fluid Disposal $ $ Risk of Fluid Disposal % % EVC Reference Value Differenti Value al Thayer School of Engineering 11/4/2010 End-User EVC of Kathon MWX 7 Assumptions Maintenance biocides extend fluid life indefinitely 1...
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...shall begin by studying incompressible flow problems. Of course all fluids are, to some extent, compressible but under steady flow conditions we may assume that the effects of changes in fluid density are small. In fact, it is the velocity of the fluid that dictates whether changes in density are significant and must be accounted for. In Chapter 6 we shall quantify the velocity limit, below which may assume that the fluid is incompressible; however, the majority of fluid flow problems that you are likely to encounter may be assumed to be incompressible. We shall focus in this chapter on incompressible flow, and on problems in which the fluid is bounded by a surface (we shall call this internal flow); the next chapter will focus on unbounded (or external) fluid flow problems. Both chapters will study real fluid flows and do this by taking into account the effects of viscosity. To do this we must examine how fluids interact with boundaries and here the concept of zero fluid velocity on a surface (boundary) is important. Once we have an understanding of how real fluid flows behave – and see how difficult it is to analyses turbulent flows –then in Chapters 4 and 5 we shall turn our attention to modelling techniques useful for examining simple fluid flow problems commonly found in engineering. Accordingly, this chapter will look at laminar and turbulent bounded fluid flows. We shall focus on pipe flow as this represents a classic example...
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...conceptualization of intelligence is often based on a dualistic division of “fluid” intelligence or “foxed intelligence”. In this traditional dialectic, the concept of fluid intelligence defines how a young person may logic and reasoning to solve problems, which do not rely on memory or past experiences to achieve this goal. More so, the concept of “fixed” intelligence often relies on memories or past experiences that help the learner adapt as they grow out of childhood and into adulthood. However, the development of multiple intelligence theories, such as Sternberg’s Triarchic Theory (2002), define a blend of (1) analytical intelligence, (2) creative intelligence, and (3) practical intelligence to define...
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...Chapter 4: Thin Film Lubrication- Theoretical Modeling Thin-Film Lubrication (TFL) deals with the region wherein the film gap is in the molecular scale. Due to this small scale, researchers rely on molecular dynamic simulation which has the given macroscopic flow of equations in which the experimental approach of this study depends. However, seeing the study in theoretical view is still limited. This viewpoint considers the material to be a continuum one in an ensemble-averaged, rather than a spatial-averaged. For a material to be continuum, the molecules must be very small in relation to the problem scale that implies a spatial averaging. A small region of space, which contains many particles, but is still much smaller than the problem scale, must be chosen. Here, quantities which smoothly vary from spatial averaging can be defined using limits. On the other hand, ensemble averaging is used to determine the value of an expected parameter. From a large number of trials in a certain point of space, average quantities are determined at this point for the trials. From a schematic diagram, researchers had found that the thick film region varies linearly with the line from Elasto-hydrodynamic Lubrication (EHL) predictions, while the thin film region levels off progressively as the thickness decreases. The thinner the film is, the more the difference can be seen. Decreasing the thickness in TFL leads to a failure region which kills the lubricant’s mobility. Thus, TFL is the last...
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...50 100 850 Credits Strength of Materials- I Theory of Machines-I Machine Drawing Applied Thermodynamics -I 4 4 4 5 4 3 1 1 2 1 29 Manufacturing Processes – I Engineering Materials & Metallurgy Engineering Materials & Metallurgy Lab BTME308 Strength of Materials Lab. BTME309 Applied Thermodynamics Lab Advisory Meeting BTME 310 Workshop Training* Total * Workshop Training will be imparted in the Institution at the end of 2 nd semester for Four (04) weeks duration (Minimum 36 hours per week). Industrial tour will also form part of this training. Fourth Semester Course Code BTME401 BTME402 BTME403 BTME404 BTME405 BTME406 BTME407 Course Name Strength of Materials – II Theory of Machines – II Fluid Mechanics Applied Thermodynamics - II Manufacturing Processes-II Fluid Mechanics Lab Manufacturing Processes Lab Load Allocation L T P 4 1 4 1 4 1 4 2 4 Total 2 2 2 1 - Contact Hours: 32 Hrs. Marks Distribution Internal External 40 60 40 60 40 60 40 60 40 30 30 30 100 60 20 20 20 Total Marks 100 100 100 100 100 50 50 50 100 Credits 5 5 5 5 4 1 1 1 - BTME408 Theory of Machines Lab Advisory Meeting General Fitness 20 05 07 390 360 750 27 2 Punjab Technical University...
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...skin is cool and clammy. What stage of shock is A.M. experiencing? What compensatory mechanisms are working to maintain cardiac output? * What stage of shock is A.M. experiencing? * What compensatory mechanisms are working to maintain cardiac output? A.M. receives 3 units type O packed RBC for profuse blood loss. An ECG and chest x-ray are done. He will be taken to the OR for removal of bullets and repair of injuries. * What other interventions are necessary at this stage to prevent progressive shock? A.M.’s surgery is successful in removing bullets and repairing blood vessels. Surgeon estimated he lost at least 3 L of blood before surgery and 1 L more during surgery . What fluids would be administered at this point to further stabilize his volume? * What fluids would be administered at this point to further stabilize his volume? * Discuss medications that may be added as well. He is intubated, has a central line catheter, and an arterial line. His BP is 102/54, HR 104, CVP 7. * What other ongoing assessment measures are necessary at this point? A.M.’s mother and girlfriend arrive in the ICU. His mother tells you that he has a history of GERD but is otherwise healthy. A.M. stabilizes over the next 2 days and is extubated. He recognizes his family. ------------------------------------------------- He has many questions regarding why he is...
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...transmissibility of forces; Equivalent force – couple system; Resolution of forces, composition of forces; Types of supports, statically determinate beams, Numerical problems on support reactions for statically determinate beams and analysis of simple trusses ,Friction. • Engineering Physics Interference, diffraction and polarization of light; Nuclear fission, fusion, particle accelerators; Wave Particle Duality • Engineering Chemistry Physical Chemistry: Atoms, molecules and solids; phase equilibria; Galvanic & Fuel cells • Organic Chemistry: Types of reactions and reaction mechanisms; Concept of armaticity Computer Concepts & C Programming Introduction to digital computers; problem solving using computers; Programming in Fortran 77: Constants, variables,expressions, statements, control statements, arrays, functions, concept of files and file operations. • Computer Aided Engineering Drawing Conic sections; Development of surfaces of solids & their intersections, Orthographic, Isometric & Perspective projections • Basic Electrical Engineering Basic definitions; node & mesh analysis; magnetic fields, magnetic circuits;...
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...equation regarding the loss of pressure of a liquid along a pipe hence the name Darcy-Weisbach equation. The dual argued that the movement of a fluid through the pipe involves resistance. The viscosity of the fluid and the instability created by the liquid and the roughness of the pipe contribute resistance. The resistance is called the pipe friction. It is measured in feet. It is also measured using the liquid’s metre head hence it is also known as the head loss. The subject of fluid dynamics has received contributions from various people. However, Darcy was instrumental in introducing the idea of relative roughness. Darcy’s concept maintains that the roughness of a pipe and its diameter internally affect the friction rates. Consequently, the two factors affect the flow of a liquid inside the pipe. Darcy further proposed that the relative smoothness of the pipe cause less turbulence thus a small friction factor is desirable. Conclusion and recommendations The experiments carried in the course of this lab have shown remarkable findings regarding fluid dynamics. First, we have learnt that pressure loss significantly increases when the flow rates are significant. Moreover, the rate of pressure loss increases with an increase in the flow rates of the liquid. Secondly, we have learnt that pipes with bends and valves cause the flow of the fluids. Furthermore, the bends and valves increase pressure drops when compared to straight pipes. Thirdly, the thickness of the liquid passing through...
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...understand their worlds (rather than relying primarily on sensory and motor activities). In this stage, children ask questions and use symbolic thinking. They may, for example, use words and images to refer to concepts. This is a time for pretending and magical thinking. Children in this phase are somewhat limited by their egocentrism. They can only imagine the world around them from their own perspective. Ben is going through that “the world stops when I say so” phase right now. He expects everyone around him to stop and listen to what he is saying. If he gets the attention he desires, all is well; if not, a screaming fit may ensue. According to Piaget (1936/1952), children in this stage have not yet mastered operations (hence, it is called the preoperational stage), which are the logical reasoning processes that older children and adults use to understand the world. . Licht,D (2014) For example, these children have a difficult time understanding the reversibility of some actions or events. They may have trouble comprehending that vanilla ice cream can be refrozen after it melts, but not turned back into sugar, milk, and vanilla. The fact that children in this stage have not yet mastered operations is apparent in their errors concerning the concept of conservation, which refers to the unchanging properties of volume, mass, or amount in relation to appearance For example, if you take two masses of clay of the same...
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...Recovery, Delayed Surgical Suffocation, risk for Suicide, risk for Therapeutic Regimen: effective management Therapeutic Regimen: ineffective management Therapeutic Regimen management: readiness for enhanced Therapeutic Regimen: Family, ineffective management Therapeutic Regimen: Community, ineffective management Trauma, risk for Wandering (specify sporadic or continual) NUTRITIONAL— METABOLIC PATTERN Aspiration, risk for Body Temperature, imbalanced, risk for Breastfeeding, effective Breastfeeding, ineffective Breastfeeding, interrupted Dentition, impaired Failure to thrive, adult Fluid Balance, readiness for enhanced Fluid Volume, risk for deficient Fluid Volume Deficient [active loss] Fluid Volume Deficit [regulatory failure] Fluid Volume Deficit, risk for Fluid Volume Excess Fluid Volume Imbalance, risk for Hyperthermia Hypothermia Infant Feeding Pattern, ineffective Latex Allergy Response Latex Allergy Response, risk for Nausea Nutrition: imbalanced, less than body requirements Nutrition: imbalanced, more than body requirements Nutrition: imbalanced, risk for more than body requirements Nutrition: readiness for enhanced Oral Mucous Membrane, impaired Skin Integrity, impaired Skin Integrity, impaired, risk for Swallowing, impaired...
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...FLUID DYNAMICS In physics, fluid dynamics is a subdiscipline of fluid mechanics that deals with fluid flow—the natural science of fluids (liquids and gases) in motion. Fluid dynamics is "the branch of applied science that is concerned with the movement of liquids and gases," according to the American Heritage Dictionary. Fluid dynamics is one of two branches of fluid mechanics, which is the study of fluids and how forces affect them. (The other branch is fluid statics, which deals with fluids at rest.) Scientists across several fields study fluid dynamics. Fluid dynamics provides methods for studying the evolution of stars, ocean currents, weather patterns, plate tectonics and even blood circulation. Some important technological applications of fluid dynamics include rocket engines, wind turbines, oil pipelines and air conditioning systems. FLOW The movement of liquids and gases is generally referred to as "flow," a concept that describes how fluids behave and how they interact with their surrounding environment — for example, water moving through a channel or pipe, or over a surface. Flow can be either steady or unsteady. In his lecture notes, "Lectures in Elementary Fluid Dynamics" (University of Kentucky, 2009) J. M. McDonough, a professor of engineering at the University of Kentucky, writes, "If all properties of a flow are independent of time, then the flow is steady; otherwise, it is unsteady." That is, steady flows do not change over time. An example of...
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...micro channel heat exchanger, Coil Designers, is developed and investigated using a general-purpose modeling concept and user friendly interface. The basic concept of a heat exchanger is based on the premise that the loss of heat on the high temperature side is exactly the same as the heat gained in the low temperature side after the heat and mass flow through the heat exchanger. Heat exchanger ‘simply’ exchanges the heat between those two sides; as a result, it is decreasing the temperature of higher temperature and increasing the temperature of lower temperature side. But designing heat exchanger might a challenge; it needs iteration for manual calculation. Many factors have to be considered in heat exchanger selection. Generally suitability of types of heat exchanger to be used in processing industrials is selected based on TEMA (Tubular Exchanger Manufacturer Association) Standards. TEMA divides heat exchanger into classes based on their application. A shell a tube heat exchanger is one of the standards designs of heat exchanger. It is most common types of heat exchanger in oil refineries and other large chemical processes, and it is suite for high pressure applications. As its name implies, this type of heat exchanger consists of a shell (a large pressure vessel) with a bundle inside the shell. The basic principle of operation is very simply as flow of two fluids with different temperature brought into close contact but prevented from mixing by a...
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...Photon correlation spectroscopy Photon Correlation Spectroscopy (PCS) is a technique that is used to determine the size distribution of small particles in suspension or polymers in liquid solution. It’s also known as dynamic light scattering. It can also be used to probe the behavior of complex fluids such as concentrated polymer solutions. Principle When light hits small particles, the light scatters in all directions as long as the particles are small compared to the wavelength. According to the Stokes Einstein’s theory, particle Brownian motion depending on the viscosity of the suspending fluid, temperature of the fluid, diffusion coefficients of polymeric samples, molecular weights of polymers and the size of particles suspending in the fluid. Thus, the graph of scattered light can be used to determine the diffusion of particles which correlates the particle sizes. Application PCS is used to characterize size of various particles including proteins, polymers, micelles, carbohydrates, and nanoparticles. If the system is mono-disperse, the mean effective diameter of the particles can be determined. This measurement depends on the size of the particle core, the size of surface structures, particle concentration, and the type of ions in the medium. Since PCS essentially measures fluctuations in scattered light intensity due to diffusing particles, the diffusion coefficient of the particles can be determined. PCS software of commercial instruments typically displays...
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...Liver: Largest internal organ and gland Gerontologic Consideration of Liver Disease * Increase liver disease rate with age because of liver structure changes with age * Decrease liver volume – Because liver size will change with age * Decrease in hepatobilary function * Decrease drug metabolism: which increases the vulnerability for drug-induced hepatitis and increase risk for drug interactions * Decrease ability to respond to injury Hepatitis Most common cause for liver inflammation is viral infection Acute Infection: * Inflammation causes damage liver cell and may develop into hepatic cell necrosis. * If there are no complications, the liver cells can regenerate and regain its normal appearance and function. Chronic Infection: * Last longer than 6 months * May persist for years * Continuous inflammation and damage done to the liver will slowly develop into liver cirrhosis, then liver failure, and then liver cancer. Clinical Manifestations: Acute Phase: 1-4 Months: Icteric Phase * Jaundice begins * Clay Color stools Convalescence Phase: Post-Icteric phase (healing phase) * Jaundice starts to disappear * Last about 2-4 months. * Major complaint is easy fatigue and malaise. Priority Nursing Diagnosis: * Activity Intolerance r/t decrease physical energy and strength. Recovery Phase: Most patients recover completely Chronic Infection/Condition: * Develops into: Chronic hepatitis, Cirrhosis, Hepatic Failure...
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...whereas dobutamine and amrinone will increase contractility and may also cause vasodilation. 2. If medications are ineffective in managing preload and afterload, what mechanical device might be used and how would it improve cardiac output?: 2. Professors Response: If these measures are not effective, an intra-aortic balloon pump will decrease left ventricle workload by decreasing afterload and increase coronary artery blood flow. 3. Mr.G. improves and is discharged from the hospital; however, he returns to the hospital ED within 10 days with a diagnosis of heart failure. He states that I can t catch my breath and my legs are as big as tree trunks and I have pain on my right side . On assessment you find that he is strictly following the fluid and salt restriction ordered since recent hospital admission but still reports that he has been gaining 1 to 2 pounds every day since discharge. He states that he takes the following medications: Enalapril (Vasotec) 5 mg bid, digoxin 0.125mg qd, furosemide 40 mg qd; potassium chloride 20 mEq qd. The admitting physician orders all the medications but changes the furosemide to 40 mg intravenous push (IVP) qd and 80 mg IVP now. What...
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