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3283 Uppsatser om Granger causality test - Sida 41 av 219

Databaser i molnet : En prestanda utvärdering

AbstractAs a developer of database-driven applications you will be faced with difficult choices, when it comes to choosing database, server and programming language. For the result to be satisfactory it requires the different techniques to interact well with each other and also fulfill performance expectations. This is even more important when the application is deployed to the cloud and the response time plays a major role.This paper evaluates different databases and their performance. To test the databases there was an application made in the server script language PHP or Hypertext Preprocessor and it was deployed to Windows Azure cloud platform. The test applications task is to call and load databases by controlled requests which creates, reads, updates and deletes data in an relatively large extent.The results shows that locale databases or databases in the same data center as the server generates the fastest response.

Löneutvecklingens bestämningsfaktorer i Sverige

The purpose of this essay is to acquire variables that explain and may be used as a base for wage estimation in the private sector in Sweden. The factors that are assumed to have an impact on wage estimation are based on earlier Swedish and international studies. Business survey data, which is based upon monthly questions to firms in various sectors of the Swedish economy posed by the Swedish National Institute of Economic Research, will be analyzed to find out weather they have an impact on Swedish wage settings or not. Tests including business survey data are yet rarely frequent, why this essay will be some kind of a pioneer within the area. To estimate significant factors that influence wage setting in Sweden, three different wage equations have been modeled and tested with a regression model.

Skadeprevention genom kognitiv beteendeträning för unga fotbollsspelare med hjälp av biofeedback.

Det positiva sambandet mellan stress och idrottsskador är väl dokumenterat i litteraturen. Ett ökat antal psykologiska skadeförebyggande interventioner visar att det är möjligt att förebygga idrottsskador genom kognitiv beteendeträning. Användandet av biofeedback tillsammans med kognitiv beteendeträning i skadeförebyggande syfte är dock en relativt outforskad interventionsstrategi (Johnson, 2007). Syftet med studien var att undersöka om det genom interventionsbaserad kognitiv beteendeträning i kombination med biofeedbackanvändning gick att minska antalet idrottsskador för fotbollsspelare. Deltagare ifrån fyra idrottsgymnasier (16-19 år) delades in i en experimentgrupp (n=13) och en kontrollgrupp (n=14).

Ägarstrukturens påverkan på tillämpningen av Svensk kod för bolagsstyrning: En studie av bolagsstyrningsrapporter

In the light of some company scandals the Swedish Code of Corporate Governance, the Code, was introduced in the year of 2004 to reinforce confidence in how Swedish listed companies are managed. As many of the other European codes of corporate governance, the Swedish Code is based on the principle of ?comply or explain?. The need for corporate governance regulation arises from the inherent conflict of interest between owners and managers. This conflict is limited in companies controlled by a family in contrast to companies that lack a strong owner.

Effekten av värmebehandlat silan på bindningsstyrkan mellan en litiumdisilikatbaserad glaskeram och ett adhesivt cement

Vid adhesiv cementering, så kallad bonding, rekommenderar fabrikanter att glaskeramers cementeringsyta etsas innan applicering av silan. Att värmebehandla silan med respektive utan etsning, har i tidigare studier visat en höjning av bindningsstyrkan mellan olika material. Den litiumdisilikatbaserade glaskeramen IPS e.max® Press har funnits på marknaden sedan 2005 och få studier har gjorts på ytbehandlingar och dess effekter på materialet och bindningen till olika material. Syftet: att undersöka om ytbehandling med värmebehandlat silan ger en högre bindningsstyrka till adhesivt cement hos en litiumdisilikatbaserad glaskeram, jämfört med kombinationen etsning och silanisering. Material och metod: 12 litiumdisilikatbaserade keramiska block pressades. Blocken delades parvis in i sex grupper och ytbehandlades med etsmedel och/eller silan med eventuell påföljande värmebehandling. Blocken cementerades samman varpå mikrostavar sektionerades fram, som sedan termocyklades. 10 provkroppar ur varje grupp valdes ut för ett microtensile bond strength test. Frakturytorna bedömdes i mikroskop.

Säkerhet och integritet i närfältskommunikation

Context. In today?s society we use smart cards in many areas, NFC is a smart card technology that allows contactless interaction between a reader and the tag, the tag is often in the form of a card. NFC can be used for various payment methods or as access card to a building which makes life easier. In previous studies, the technique has proven to be weak to attacks using an NFC reader connected to a computer.

Stärkelsers funktion som konsistensgivare vid olika temperaturer i pulversoppa : en experimentell kvantitativ studie

More often consumers demand instant dry soup that can be prepared with a water temperature below 100o C, which is currently not possible, because the dry soup becomes too thin when using water with a lower temperature. In this study, various kinds of starch studies were made to optimize the starch used in the existing product to make it more viscous at both high and low temperatures. The result was that one of the two starches present in the existing product was retained by change in quantity as it contributed to important flavor parameters. The second was removed and replaced with a starch that made the product more viscous at lower temperatures. To find out if the new product differed from the existing product a viscosity measurement and a sensory paired preference test were made.

Hur förselektion av hästar till bedömning och tävling kan hanteras i avelsvärderingen

The Swedish Warmblood riding horse is a popular horse for sport in Sweden, and the breeding goal is to produce competitive horses in both show jumping and dressage. The breed has its origin in native Swedish cavalry horses but has been highly influenced by foreign stallions throughout the years. Breeding values are estimated based on the results from young horse field test, which are held for 3- or 4-year old horses, and competition data. The young horse field tests are highly correlated with later performances in competition. The total proportion of horses with own observations to include in the genetic evaluation are slightly under 50 %, and in most cases their pedigrees are known.

Komprimering av testdata för SOC : -En implementation av metoden vector repeat

Sammanfattning:De ökande testdatavolymerna som krävs för att testa moderna System-On-Chip (SOC) bidrar i hög grad till den ökande produktionskostnaden. De stora testdatavolymerna kräver stora och dyra Automatic Test Equipment-minnen (ATE-minnen). För att minska behovet av dessa minnen så har olika komprimeringsmetoder utvecklats.Denna rapport beskriver arbetet med att implementera en given komprimeringsmetod för testdata till SOC. Den metod som används heter vector repeat och den implementeras genom skapandet av ett för ändamålet avsett dataprogrogram. För att vector repeat ska fungera effektivt så förutsätts det att in- och utgångarna på den ATE som används kan delas in i olika portar.

MÖJLIGHETERNA MED CLUSTERED COLUMNSTORE INDEXES & IN-MEMORY OLTP

Clustered Columnstore Indexes (CCI) and In-Memory Online Transaction Processing (OLTP) are two new techniques that were introduced with Microsoft?s new database management system SQL Server 2014.The thesis analyzes these two techniques, describes the theory behind them and also the background information that needs to be known to understand more of the new techniques. Performance tests of the new techniques have been performed to see how much faster response time we can get and less storage we need to use where the result is represented by performance diagrams and a compression diagram. This thesis is a cooperative work with a company called Trimma and the result is used as support to decide if these new techniques could be of advantage for the company.The test consists of five test queries with different purposes. The result is illustrated by diagrams that show the result and another diagram that shows how much the data gets compressed with the different techniques.

Språklig utveckling : Pedagogers arbete med språklig medvetenhet och språklig stimulering

The aim of my study is to investigate if and in that case how the writing process and texts written by students in the upper secondary school are affected by the writing tool; does it matter if they write their texts on a computer or by longhand? Another objective is to compare such an effect with the findings of previous studies performed on earlier generations of writers. The first part of my study was a survey. It showed that two thirds of the 67 students participating thought that they would have written better texts in the national writing test if they had been able to use computers. In the second part of the study each of the fourteen participants wrote one text on computer and another by hand.

Orderhantering via Android

This degree project deals with creating an Android application for managing representation orders placed in stores as well as evaluating Androids usage as a platform for that line of work. The evaluation will be based on tests of the application on an Android phone together with a survey consisting of written questions and a practical test of the application..

Analys av juverhälsodata från kärnbesättningen Viken :

Nötcenter Viken is a Swedish nucleus herd for dairy cattle. The goal for the farm is to select suitable mothers for the next top generation of bulls. Today the selection for udder health is based on a pedigree index and phenotype data. The pedigree index is based on the cow?s father and grandfathers breeding values.

Ett misslyckat IT-projekt : En fallstudie om faktorer som påverkar resultatet av ett IT-projekt

IT-projekt bedrivs i många företag av olika anledningar. Orsaker till att genomföra ett IT-projekt kan exempelvis vara att hänga med i IT-utvecklingen, utveckla IT-produkter eller att stärka ett företags konkurrenskraft. Det spenderas stora summor och mycket tid på att bedriva IT-projekt och många människor arbetar i IT-projekt. Men alla IT-projekt får inte en lyckad utgång, utan många misslyckas. Ett misslyckande i ett IT-projekt kan påverkas av flera faktorer.Syftet med denna fallstudie är att analysera ett misslyckat IT-projekt för att komma fram till vilken eller vilka faktorer som påverkade misslyckandet och på vilket sätt.

Optimering av påstorkning : Från behov till färdig konstruktion

This thesis describes the redesign ofequipment designed for drying bags thatis used in Fresenius Kabis´manufacturing of their nutritionmedicine in Uppsala. The need of thistask arise during the start of thedevelopment of a new packaging line werethis equipment were meant to be used. Anevaluation of the bagdryers capacity andcapability was necessary.The work started with gathering ofinformation from suppliers of the usedcomponents and from the responsibleengineers for this equipment. Aneducation to learn how the equipmentworked and how to operate it were taken.That was followed by the creation of astudy plan were the tests were plannedto test different parameters effect onthe drying result and to see if thebagdryer managed to handle the bags ofthe correct format in the pace that theequipment should be designed for.The test results detected a need ofdesigning a unit with a function thatholds the bags in place while passingthrough the dryer in order to attainhigh quality results. The results werelater used for optimization of thedesign.

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