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SMD Type Metallic Reflection Cup LED Component on the Application of Backlight ModuleWang, Hui-chi 17 July 2009 (has links)
Nowadays, using the LED as backlight module's light source becomes generalization gradually, and the application of LED light source develops from the liquid crystal display to the liquid crystal TV. However, thermal dissipative problem of LED component is still an important issue to study presently, since it can affect the service lives of LED and LCD seriously. In order to increase the luminous energy of the LED component, one need to increase the supply of electric power and it will cause the increment of thermal dissipative problem of the LED component also. Therefore, by considering the LED components as the light source of the backlight module , the purpose of this study is to reduce number of the required LED components in order to decrease the thermal dissipative problem of LEDs, and maintain the luminous and uniformity of the backlight module simultaneously.
A new packaging for LED, named SMD type metallic reflection cup LED component, was proposed in this study. The new LED package not only has a better thermal dissipative property, but also can control its radiation property by changing the angle of its reflection cup. So, the proposed LED package can be applied for different purposes. By applying the proposed LED components as the light source of a backlight module, under the condition of same illumination, it can be shown that the required number of LED components can be decreased tremendously and so the thermal dissipative problem can be decreased too. Also, the numerical simulated results showed that by choosing the suitable angle of the reflection cup, the uniformity of the backlight module can be improved.
Besides, this study proposed a modified method for assessing the uniformity of a backlight module. The simulated results showed that the proposed method can assess the uniformity of a backlight module more suitable than the traditional nine points measurement method can do.
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Developent of a Vending Cup.- Mistral Vending Cup.Núñez Ramos, Patricia, Romero del Hombre Bueno Mérida, Juan January 2009 (has links)
<p>This is a Bachelor Degree Project report based on the design of a plastic vending cup.The project is carried out in cooperation with the company Promens Lidköping,manufacturer of a wide range of plastic products as food packaging, trays, pots, cups andsheets for the food industry.</p><p>A vending cup is a product used to contain hot beverages which come from vendingcoffee machines. It is a product daily used in many different environments as hospitals,offices, libraries and common places, etc. Consequently it is aimed at a varied public.</p><p>The redesign was focused mainly on the aesthetics aspect attempting to transmit aninnovative touch that would change the concept of today’s simple vending cup in a waythat it attracts the customer’s attention.</p><p>The so called Mistral Vending Cup is a plastic cup which is out of the ordinary currentvending cup by means of a new bright colour, orange, and also its innovative shape, inthis field, constituted basically from organic lines and curve surfaces unlike the today’svending cups. The Mistral Vending cup introduces a great change, a new era in thehistory of the vending cups due to its organic shapes never seen in the market.</p>
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Finite element modeling of hip resurfacing cup deformationKesler, Nathanael Murray 12 January 2010 (has links)
Hip resurfacing arthroplasty is touted as an attractive alternative to total hip arthroplasty for treatment of severe joint pain and limited mobility in young patients because it is bone conserving and allows for a greater range of motion. There is concern in the orthopaedic community, however, regarding surgically-induced deformation of hip resurfacing cups. Cup deformation could potentially compromise the tight clearance between the femoral head and cup, resulting in increased wear, acoustic emissions, and joint binding. This phenomenon has been investigated both experimentally and with finite element analysis (FEA). Finite element studies have contributed significantly to our understanding of cup deformation, such as the effect of different cup dimensions on deformation results, but unfortunately such studies were deficient in a number of ways. The first objective of this thesis was to create a three-dimensional finite element model of resurfacing cup deformation that addressed the limitations of previous models pertaining to pelvic geometry, meshing, material properties, and cup insertion, in order to more fully elucidate cup deformation. The second objective was to demonstrate that two-dimensional characterization of cup deformation at the cup rim is insufficient, by more fully characterizing cup deformation in three-dimensions. The geometry was obtained via laser scanning and digital processing of a hemi-pelvis replica, meshing was performed without the use of shell elements, linear elasticity with strain-hardening after the onset of yielding was assigned to the cup and bone, and the most appropriate method for simulation of cup insertion was determined via two-dimensional axisymmetric analyses. Also, cup deformation was characterized in three-dimensions. The key findings of this thesis are that bone yield behaviour has important implications on press-fitting simulation, and the cup deforms irregularly and possibly plastically during press-fitting. A three-dimensional finite element model of resurfacing cup deformation that addressed the limitations of previous models was successfully created. Measurement of deformation at the rim of the resurfacing cup for characterization of cup deformation is insufficient; full characterization of cup deformation in three-dimensions is necessary. Future work should incorporate clinical testing to obtain model inputs such as impact and muscle forces, as well as model validation.
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Cell proliferation, apoptosis and migration within the human fetal retinaKosmin, Alan Simon January 1998 (has links)
No description available.
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Finite element modeling of hip resurfacing cup deformationKesler, Nathanael Murray 12 January 2010 (has links)
Hip resurfacing arthroplasty is touted as an attractive alternative to total hip arthroplasty for treatment of severe joint pain and limited mobility in young patients because it is bone conserving and allows for a greater range of motion. There is concern in the orthopaedic community, however, regarding surgically-induced deformation of hip resurfacing cups. Cup deformation could potentially compromise the tight clearance between the femoral head and cup, resulting in increased wear, acoustic emissions, and joint binding. This phenomenon has been investigated both experimentally and with finite element analysis (FEA). Finite element studies have contributed significantly to our understanding of cup deformation, such as the effect of different cup dimensions on deformation results, but unfortunately such studies were deficient in a number of ways. The first objective of this thesis was to create a three-dimensional finite element model of resurfacing cup deformation that addressed the limitations of previous models pertaining to pelvic geometry, meshing, material properties, and cup insertion, in order to more fully elucidate cup deformation. The second objective was to demonstrate that two-dimensional characterization of cup deformation at the cup rim is insufficient, by more fully characterizing cup deformation in three-dimensions. The geometry was obtained via laser scanning and digital processing of a hemi-pelvis replica, meshing was performed without the use of shell elements, linear elasticity with strain-hardening after the onset of yielding was assigned to the cup and bone, and the most appropriate method for simulation of cup insertion was determined via two-dimensional axisymmetric analyses. Also, cup deformation was characterized in three-dimensions. The key findings of this thesis are that bone yield behaviour has important implications on press-fitting simulation, and the cup deforms irregularly and possibly plastically during press-fitting. A three-dimensional finite element model of resurfacing cup deformation that addressed the limitations of previous models was successfully created. Measurement of deformation at the rim of the resurfacing cup for characterization of cup deformation is insufficient; full characterization of cup deformation in three-dimensions is necessary. Future work should incorporate clinical testing to obtain model inputs such as impact and muscle forces, as well as model validation.
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FIFA World Cup: Factors that explain the performances of National Football TeamsSeth, Shivaan 01 January 2018 (has links)
This paper examines the determinants of FIFA World Cup performances of nations. The study incorporates socioeconomic, cultural, demographic and football-specific factors to investigate how World Cup results can be explained. A linear regression is used to study the last five tournaments, and the model finds that being seeded for the draw, and the host country effect are statistically significant variables. Additionally, I discover two new variables – namely, having a star player and having become a member of FIFA before 1924, as being statistically significant in my analysis.
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Modelling And Simulation Of Friction In Deep DrawingBaspinar, Murat 01 September 2011 (has links) (PDF)
Different contact surface parameters and operating characteristics are observed during the deep drawing process. It is not possible to find a formulation that can be used for all lubrication regimes. Therefore, several friction models have been developed in order to overcome this problem. In this study, a math program is developed which combines Wilson&rsquo / s and Khonsari&rsquo / s friction models in a new model in order to increase accuracy and efficiency in friction calculations. By comparing the results of both friction models, the film thickness ratio of 0.035 is introduced for 0.15 &mu / m standard deviation of surface summits. Below the ratio of 0.035, Khonsari&rsquo / s model gives more accurate results since asperity friction is dominant and the model is based on asperity contact. Above the ratio of 0.035, Wilson&rsquo / s model gives more accurate results since hydrodynamic friction is dominant and the model is based on lubricant flow.
In this study, a finite element program is used to simulate 50 mm cylindrical and 50.5x50.5 mm square shallow drawing processes which are performed in single stage. The final cup depths are selected as 18 mm and 23 mm for square and cylindrical cup drawing respectively. The FEM model and the program codes developed are verified by the previous studies in literature. After verification, the simulation results of the cylindrical and square cup drawing are input to a math program which calculates local friction coefficients using the combined friction model. Finally, the combined friction model and the results are further discussed.
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Mega sports event policy in Marseille 1991-2003 the football World Cup and the Americas Cup : a case study of urban governanceCometti, Aurelie January 2007 (has links)
The aim of this thesis is to provide a theoretically informed account of the decision-making process in mega sports events policy in Marseille. This is intended to allow an evaluation of the major theoretical frameworks developed in the Anglo-Saxon literature on urban governance and their applicability to the French local government context, and more specifically to the context of sports policy in Marseille. Following an analysis of the development of the local political culture of Marseille, the thesis undertakes a review of theoretical frameworks developed in the urban policy literature identifying three major approaches / concepts which have dominated Anglo-Saxon literature, namely the growth coalition (Logan and Molotch 1987), policy network (Rhodes 1981; 1988), and urban regime (Stone 1989) approaches. These theoretical frameworks have been little used in French urban policy literature (Le Gales 1995; 2003) and feature rarely, if at all, in French sports policy literature. In reviewing this literature the thesis identifies a set of indicators, which may be used in empirical contexts to differentiate growth coalitions from policy networks and urban regimes. A major question for the research is thus to what extent Anglo-Saxon theoretical frameworks / concepts can be usefully employed to understand French decision-making and that of Marseille in particular. Subscribing to critical realism, the thesis aims to give an account of the mega sport event phenomena in Marseille, and of the actors' understanding and interpretation (in effect their social construction) of the phenomena. The data collected were documents for the period 1991 - 2003 from official sources (minutes and proceedings of local government and event-related bodies, reports, political speeches, and local government publications), local press coverage, and interviewees conducted with the major decision-makers. An ethnographic content analysis was made, partly employing a deductive approach based on the set of common indicators developed from the review of urban policy, and partly inductively from themes, which emerged in the analysis (Altheide 1996). The thesis concludes that while there is some evidence of the development of policy networks the specificity of the French context, and that of Marseille, with its heavily state-led approach to policy, means that the use of urban regime, and still less of growth coalition approaches, is not warranted by the evidence.
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Drinking water quality and the long handled mukombe cup : acceptability and effectiveness in a peri-urban settlement in ZimbabweMwenda, John January 2017 (has links)
Magister Public Health - MPH / Introduction: In-house contamination of drinking water stored in wide-mouthed buckets (even with lids) has been widely reported in epidemiologic investigations as vehicles for diarrhoea disease transmission. The long handled mukombe cup (LHM cup), recently developed by the National Institute of Health Research (NIHR), a department of the Ministry of Health and Child Care (MoHCC) in Zimbabwe, is a promising low cost dipping devise for extraction of water from wide-mouthed containers. Aim: The study aim was to assess the effectiveness and household acceptability of the long handled mukombe cup in reducing bacteriological contamination of drinking water stored in wide-mouthed vessels in the home in a peri urban settlement in Harare, Zimbabwe. Methodology: A randomised controlled trial of a long handled mukombe cup was conducted in Hatcliffe, Harare. After collecting baseline data on demographics, household water quality, and other sanitation and water handling practices, households were given basic health education before the two selected communities were randomly assigned to one of the two groups of 119 households each. The intervention group received the LHM cup while the control group received no intervention. Households were followed up after two months and assessed effectiveness and user acceptability of the intervention. Data Analysis: Data analysis was conducted using STATA 11. Descriptive statistics were calculated and reported as percentages, proportions, frequencies and measures of central tendency. Bivariate statistics were carried out to test independent associations between use of the LHM cup and E. coli. All analyses were conducted in an intention-to-intervene analysis. Results: A total of 230 households were analysed during follow-up. Samples of stored drinking water from intervention households were significantly lower in E. coli levels than those of control households (geometric mean E. coli of 0.8/100 ml vs 13.0/100 ml, p <0.0001). Overall, 78.4% (987/111) of samples from the intervention households met World Health Organization (WHO) guideline value of 0 cfu/100ml sample, while 52.1% of the 119 samples from control households met such a benchmark (p < 0.0001). In addition, 94.6% of intervention household samples were in compliance with this intervention or presented low risk, 27.7% of samples from control group households presented intermediate or high risk. There was a statistically significant association between LHM cup use and reduced E. coli bacterial contamination in stored drinking water (p < 0.05). There was no statistically significant difference in turbidity in both intervention and control groups, both for turbidity <5 and >5 (p = 0.071). Acceptability of the LHM cup was very high (100%). Conclusion: To our knowledge, this is the first study on the evaluation and acceptability of the LHM cup in the Sub-Saharan Africa. Positive results were recorded that showed that the LHM cup was effective in minimising E. coli contamination in the intervention group as compared to the control group. It is postulated that this is because the LHM cup reduces hand contact with stored water during scooping, thus maintaining improved water quality in communities in Zimbabwe that collect and store drinking water in wide-mouthed containers with lids where extraction is by scooping. However, more research is required to document the LHM cup's continued and effective use, durability and overall sustainability in the absence of any serious sampling or monitoring.
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Srovnání hemisferické a kónické jamky u totální náhrady trapéziometakarpálního kloubu / Comparison of hemispheric and conical cup in the total trapeziometacarpal joint replacementKukučka, Ivan January 2020 (has links)
This diploma thesis deals with the comparison of total replacement of a trapeziometacarpal joint with a hemispherical cup and replacement of the same joint with a conical cup. In both cases of implants, these are types of replacements with dual mobility. The focus of the diploma thesis is the comparison of the transfer of forces from the head of the prosthesis to the trapezius bone through the different shape of the cup. The work was processed using computer software ANSYS Workbench 19.3.
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