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496 Uppsatser om Linear programming - Sida 28 av 34
Off-ice vs. on-ice : Hopptesters samband med skridskoåkning i ishockey
AimThe purpose of this study was to investigate the relationship between off-ice horizontal jump tests and on-ice skating among students at hockey high schools. Questions: What is the association between the performance on horizontal jumps and skating 10 meters standing start among students in Swedish ice hockey high schools? What is the association between the performance on horizontal jumps and skating 10 meters flying start among students in Swedish ice hockey high schools?MethodStudents at three ice hockey high schools in the Stockholm area participated in the study. Two schools were national approved sports educations and one at lower level. All 50 students (41 at national approved sports educations and 9 lower level) that were included in the study were men and went year one and two in gymnasium.
Skolan och stress : En studie om skolpersonalens syn på elevers stress
AimThe purpose of this study was to investigate the relationship between off-ice horizontal jump tests and on-ice skating among students at hockey high schools. Questions: What is the association between the performance on horizontal jumps and skating 10 meters standing start among students in Swedish ice hockey high schools? What is the association between the performance on horizontal jumps and skating 10 meters flying start among students in Swedish ice hockey high schools?MethodStudents at three ice hockey high schools in the Stockholm area participated in the study. Two schools were national approved sports educations and one at lower level. All 50 students (41 at national approved sports educations and 9 lower level) that were included in the study were men and went year one and two in gymnasium.
Utvärdering av offentlig verksamhet: begrepp kontext, motiv, strategier, användningen och aktörerna
Based on a review of literature on evalution of public activities and in purpose to introduce amore general framework, this study describes a picture of the concept, context, motives,strategies, use and actors in Evaluation as these are experienced outside the field of libraryand information. The background is the increased need for" evaluations in public libaries and aneed for new LIS knowledge about it. The reviewed literature has its origin in differentdisciplinary contexts and the study include contributions from policy studies, sociologi,education research, business administration, philosophy and anthropology. The focus, though,is not placed upon differences in the literature but on similarities.The review is organised in six parts. In the first part a presentation is given of how evaluationsare conceptualized and its meaning in a historical perspective.
Produktivitetsförbättringar : - förhöjning av produktiviteten vid mekanisk verkstad genom förkortade transportsträckor och standardiserad bearbetning
The aim of this project has been to raise the production efficiency of Daliff Precision Engineering through reduced transportation time and a more standardized manufacturing process. The problem has upraised because of a big and diversified product flora without any standard products and with just small batches ordered. The report also tries to show the work procedure with general analytical methods and be an example of how a similar problem can be resolved. The transportation time is being proposed to be reduced through a change in the layout of the factory. By moving a few manual machines, dispatch and burring to more efficient locations, the total transportation time will be reduced by 55 %.
Sa?kerhet och integritet i webbapplikationer : En orientering o?ver sa?ker utveckling
The use of Web applications is a growing area. While the possibilities and functionalities are increasing, so is the complexity of them, together with the threats against them because the complexity also opens up the application to vulnerabilities. It is therefore important for developers to know how a web application can be developed with security in mind.This study?s intention has been to create an introductory documentation of what kind of techniques that exists which can produce higher security, which methods there can be within the development process and what to think about when programming secure web applications. In this paper we have investigated how theoretical manuals in the IT security department handles that area, and interviewed two developers from two different companies to see how they use security in their web applications.The study has an exploratory technical perspective and does not explain how to practically use and interconnecting different security-enhancing technologies, but is more suppose to give a first glance at what is available and sow a seed for those interested to continue reading further about the subject.
Utveckling och psychometrisk testning av "Pain Impact Inventory" - en jämförelse mellan två olika ansatser
The aim of this study was to develop and psychometrically evaluate an instrument for measuring the impact from chronic pain on daily life. Traditionally psychometric evaluation is done with parametric methods even if the items are ordinal data. In this study the instrument to be developed is solely based on ordinal data, and the psychometrically evaluation is done with both traditional methods (i.e. parametric statistics) as well as with non-parametric methods. These two different ways of psychometrically evaluation are then compared with each other.
Den nya smygreklamen : En kvalitativ studie av Avsändar-Finansierade Program och dess betydelse för tv-branschen
Syftet med studien är att belysa, problematisera och diskutera fenomenet Advertiser-Funded Programming eller Avsändar-Finansierade Program som det kallas för på svenska. Avsändar-Finansierade Program är en av de senaste trenderna när det kommer till att integrera organisationskommunikation med massmedia. Annonsörerna har tagit steget från att enbart exponera produkter och varumärken i reklampauser i och mellan program till att nu finnas med som en finansiell aktör i finansierings- och produktionsprocessen. Samtidigt som organisationers externa kommunikation integreras i underhållningsprogrammen minskar publikens möjlighet att värja sig från kommersiella budskap eftersom budskapet blir en del av det redaktionella innehållet. För att hämta åsikter och tankar från personer som direkt berörs av annonsörernas intåg i produktionsprocessen genomfördes kvalitativa intervjuer per telefon med personer som arbetar aktivt med AFP.
En modell som förutsäger naturlig skogstyp utifrån geografik information
Sveriges yta täcks idag av närmare 60 % skog, varav större delen utnyttjas för skogsbruk. Hur skogsbruk ska bedrivas är omdiskuterat, och alternativa metoder till det dominerande trakthyggesbruket har utvecklats. Vissa av dessa metoder, t.ex. Lübeckmodellen, utgår från naturliga förutsättningar för att producera en skog som lämpar sig på en given plats.Syftet med denna studie är att utveckla en modell som med enkla GIS-data översiktligt kan prediktera naturliga skogstyper utifrån andra variabler än befintlig skog, då den skog som finns idag ofta är planterad och därför inte alltid avslöjar en plats naturliga skogstyp. Förhoppningen är att modellen ska kunna vara användbar vid skötsel av och omställning till naturlig skog.Studien baserades på skogsområden vars vegetation antogs vara naturlig (naturreservat, nyckelbiotoper o.dyl.) i Askersunds kommun, Örebro län.
Variationer i kostnader för specialiserad sjukvård - En analys av demografi, socioekonomi och hälsans inverkan på kostnaderna för specialistvård i Västra Götalandsregionen
Abstract. Aim: The aim of this study is to determine certain health, demographic and socioeconomic factors that affect the costs for specialized health care between the municipalities within the Västra Götaland region. Method: The method is explorative and analytical. The costs for specialized health care was divided into three different subgroups; independent somatic specialized health care, specialized health care provided by private practices or outside the region and psychiatric specialized health care. The data was age-standardized.
Genom statistisk analys utvärdera geometriska parametrars påverkan på ett XPI- cylinderhuvuds snurrtal
This Master Thesis is a product development project that has been carried out in cooperation with Scania CV AB. The purpose has been to find the relationship between geometric parameters and the swirl number for an XPI- cylinder head in order to improve the design specification.The increased focus on environmental issues from society leads to tighter emission legislations for the truck manufactures. In order to drive the development forward considerable resources are spent on research and development on diesel engines and its combustion process. The inlet air has a significant impact on the formation of emissions and the flow that is desired is called swirl. Swirl is achieved by making the air rotate around the vertical axis of the cylinder.Earlier cylinder heads that has been developed at Scania CV AB have shown clear relationships between geometric parameters of the cylinder head and the swirl number.
Utbildningens betydelse för våld i nära relationer. En litteraturbaserad studie om associationen mellan kvinnors utbildningsnivå och våld i nära relationer i låg- och medelinkomstländer.
Introduction: Intimate partner violence (IPV) is a great public health issue that can cause serious physical, psychological and psychosomatic injuries to the woman. Education is one out of many important protective factors against IPV. Aim: This study aimed to investigate the association between women?s educational level and IPV in low- and middle-income countries, the interaction between the education of the woman and the man and IPV, how education on different levels (individual-, family- and community-level) influences IPV and how gender is connected to education and IPV. Method: A literature-based study with 12 selected scientific articles as the foundation for the analysis was performed.
Utvärdering av ett system för Rapid Control Prototyping inom området robotstyrning
In this report a system for Rapid Control Prototyping, RCP, is evaluated through animplementation of the motor control methods Field Oriented Control, FOC, and Space VectorPulse Width Modulation, SVPWM. The evaluation emphasizes on time-consumption andresource utilization on the used hardware and on usability for of software.A new mechatronic laboratory is under development at ABB Corporate Research in Västerås. Itwill be used for both mechanical and motion control design using existing and new hardware.The control structure in a traditional robot system will be interfaced to a rapid prototypingsystem which should allow easy changes to algorithms at different levels in the system.The system designated for this project comes from National Instruments and constitutesLabVIEW Real-time and FPGA module as the software tools. The hardware is a NI Single-Board RIO (Reconfigurable Input Output), sbRIO, development board including a Field-Programmable Gate Array, FPGA, from Xilinx and a microprocessor from FreescaleSemiconductor. Graphical programming is performed in the LabVIEW environment, andthrough Xilinx tools the LabVIEW FPGA code is compiled to VHDL code.A pre-study was carried out to clarify the concept of RCP and investigate different systems forRCP and their traits.
Utvärdering av den svenska cykelhjälmslagen för barn under 15 år : Analys av nationella trender i cykelrelaterade huvudskador mellan 1998-2011
Introduction: In January 2005, a nationwide mandatory bicycle helmet law for children under the age of 15 was introduced in Sweden. In the current study, the effect of this law was evaluated by analyzing national trends in hospital admissions due to bicycle-related head injuries during the period 1998-2011.Methods: An interrupted time-series design with segmented regression analysis was used to evaluate the intervention effect on head injuries as a percentage of all injuries (%HI) among cyclists in age- and sex-specific groups. Effect was measured as a change in level and/or slope of the trend at the time of legislation.Results: A total of 35261 cyclists (0-54 years) were hospitalized due to a bicycle injury during the study period. Linear regression analyses of the entire study period (not segmented) showed significant year-to-year decreases in the %HI of 1.3-1.7% in all age and sex-specific groups (p < .0001). Results from the segmented regression analysis showed that, at the time of legislation, a significant drop in level occurred among males under 15 years (-4.5% [95% CI: -7.7% to -1.3%], p = .01) and a significant change in slope occurred among females aged 30-54 years (-1.6% [95% CI: -2.9% to -0.2%], p = .025).Conclusions: The law seems to have had an effect on males in the target population (<15 years).
Development of a method for determination of pesticide residues in honey using liquid chromatography tandem mass spectrometry
Honey is a product that may contain pesticide residues due to contamination from bees pollinating various plants as well as elimination of vermin inside the hive. Different methods are needed for analysis of pesticides, since the term includes a wide range of different substances. National Food Administration lacks a validated method for determination and quantification of pesticides in honey using liquid chromatography tandem mass spectrometry, LC-MS/MS. The technique is especially important in analysis of polar and non-volatile pesticides, where gas chromatography is not functioning optimally. After investigating what pesticides could be found in honey produced in Sweden, a number of four pesticides suitable for analysis with LC-MS/MS was compiled; boscalid, impidacloprid, tau-fluvalinate and thiacloprid.
Evaluation and Comparison of Ecological Models Simulating Nitrogen Processes in Treatment Wetlands,Implemented in Modelica
Two ecological models of nitrogen processes in treatment wetlands have been evaluated and compared. These models have been implemented, simulated, and visualized in the Modelica language. The differences and similarities between the Modelica modeling environment used in this thesis and other environments or tools for ecological modeling have been evaluated. The modeling tools evaluated are PowerSim, Simile, Stella, the MathModelica Model Editor, and WEST. The evaluation and the analysis have been performed using McCall?s factors for software quality (McCall et al, 1977), a correlation analysis and the Constant Comparative Method (Glaser&Strauss, 1999).