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309 Uppsatser om Alpha estimation - Sida 2 av 21

Effekt av värmemadrass efter ECC-inducerad hypotermi vid hjärtkirurgi : -En kvasiexperimentell pilotstudie

Bakgrund: Vid hjärtkirurgi kyls patienten via ECC (extracorporeal circulation) till 32-34 °C för att minska metabolismen och syrekonsumtionen i vävnaderna. Efter att operationen är klar är det viktigt patienten blir normoterm då hypotermi medför många negativa effekter.Syfte: Att undersöka om värmemadrassen Inditherm Alpha® hjälper patienten att hålla en normal kroppstemperatur efter ECC-avslut samt om andra faktorer, dels demografiska, dels procedurrelaterade, kan påverka utfallet av uppmätt kroppstemperatur.Metod: Femtiofem patienter som genomgick elektiv CABG och/eller klaffoperation med ECC-inducerad hypotermi inkluderades konsekutivt. Undersökningsgruppen (n=29) genomgick kirurgi med värmemadrassen Inditherm Alpha® medan jämförelsegruppen (n=26) genomgick kirurgi utan värmemadrass. Grupperna var jämnt fördelade i alla avseenden förutom kön.Resultat: Flertalet patienter sjönk i kroppstemperatur efter ECC-avslut (p < 0,0001) men majoriteten av patienterna var normoterma vid ankomst till intensivvårdsavdelningen. Undersökningsgruppen hade inte högre kroppstemperatur vid något mättillfälle jämfört med jämförelsegruppen.

Vad bidrar till valet av precision i produktkalkylen?: En fallstudie om diskrepansen mellan teori och praktik inom produktkalkylering

Studies show that activity based costing (ABC) is not widespread in practice even though it has been present in the academic world since the 80's. This thesis examines the reasons for the discrepancy between theory and practice through a case study of a Swedish manufacturing company. The intension is to answer the question of what contributes to the choice of precision in product costing.We found arguments for increasing precision in product costing but not to the extent of a full-scale ABC implementation. The company's estimation of the value of increased precision. In the study three company unique factors were isolated that affected the company's estimation of value; drifting purpose of product costing, historical use of product costing and knowledge about product costing..

Automatisk mätning och detektering av röjande signaler

This master thesis has been performed at Sectra Communications AB in Linköping where they manufacture electronic encryption devices. In cryptology it is essential that an eavesdropper cannot find the plain text. To assure that a system is safe, all devices are thoroughly examined so that they don?t emit any secret information, so called Compromising Emanations (CE). This is done by comparing the secret signal with measured signals on the screen of an oscilloscope, a process that is very time consuming and furthermore, the risk of missing compromising emanations is high.

Inverkan av leasingklassificering på konkursrisk - en studie av hur redovisningsbaserade prediktionsmodeller påverkas av en ny leasingstandard

The purpose of this bachelor-thesis is to investigate the possible effects of lease accounting on the estimation of bankruptcy. This is done by estimating the risk via prediction models based on accounting ratios for a sample of 43 listed firms in Sweden. Estimation is conducted twice for each firm, once base on unadjusted data as it is presented in the annual report of 2012, and one with data adjusted for operational leases (that is data is treated as if all leases present were to have been reported as financial leases). In the next step it is tested weather the predictive ability of the models is affected by this adjustment or not. For this purpose translation of bankruptcy risk into synthetic credit ratings via interest coverage ratios is done.

Uppdatering av båtnadskalkyl med hänsyn till nya faktorer :

Sweden have 419 000 km road in the country and about half of these roads is forestroads. The forest road net most important mission is to make it possible to deliver wood from the forest to the industries. With a raw material that is spread over a large area the road network is important. Each year has the forest road network been extended with about 1 700 km new roads. To decide if a new road is to be built different forest road cost estimation models has been used.

Korsplattformskommunikation med Bluetooth Low Energy

This project investigated the current market regarding wireless net and the communication between the tools used for diagnostics/maintenance and an embedded system. Based on documentation obtained through interviews a demo system was created based on Bluetooth Low Energy (BLE) communication between an embedded system and an Android device.This report intends to describe the tools and methods used in the design of the demo system and the result of an analysis of the BLE communication.Bluetooth Low Energy is an exciting protocol with wide applicability within the industrial field. This project investigated the communicational possibilities between a Smartphone and a Raspberry Pi and based on the results that emerged the conclusion can be drawn that BLE is a protocol with many beneficial applications within industrial IT..

Vitamin A och E i relation till hästutfodring :

The purpose of this study was to examine vitamin A and E in equine nutrition and especially in relation to forages. A literature review was conducted to examine factors that influence the level of vitamins present in forage, the vitamin A and E requirement of horses, and the absorption of vitamin A and E in horses. The influence of DM level on alpha-tocopherol and beta-carotene content in ensiled forage was investigated in a controlled ensiling study using baled silage and haylage. The results from the ensiling study were combined with data of vitamin A and E concentrations collected from literature. Calculations were done to theoretically establish how well the vitamin content in ensiled forage can cover the maintenance requirements of vitamin A and E in horses.

En indirekt metod för adaptiv reglering av en helikopter

When a helicopter is flying, the dynamics vary depending on, for example, speed and position. Hence, a time-invariant linear model cannot describe its properties under all flight conditions. It is therefore desirable to update the linear helicopter model continuously during the flight. In this thesis, two different recursive estimation methods are presented, LMS (Least Mean Square) and adaptation with a Kalman filter. The main purpose of the system estimation is to get a model which can be used for feedback control.

Total hälseneruptur: Resultat efter operativ respektive konservativ behandling.

ABSTRACTBackground: On behalf of the Orthopedic clinic, Västerås, a study has been conducted with focus on comparing the results after conservative and surgical treatment due to complete achillestendon rupture.Aim: To compare results when testing the active and passive range of motion, calf muscle endurance, estimation of pain related to the achillestendon and self-efficacy to be physically active for individuals who have undergone conservative or surgical treatment after complete achillestendon rupture.Method: 14 individuals afflicted by complete achillestendon rupture in 2010 were recruited as a purposive sample. Examination were conducted of: Ankle range of motion with a goniometer, calf muscle endurance through a toe-raise test, estimation of pain intensity related to the achillestendon by VAS and self-efficacy to be physically active through ?Exercise self-efficacy scale?. P-value and the median were calculated.Result: The results of ankle range of motion and calf muscle endurance were based on the difference between the injured and the healthy side. When testing active plantarflexion the conservative group had a median of 4 ? and the surgical group had a median of 10 ?.

Optimering av informationsinsamlingvid prototyptillverkning

This report discusses a method to detect divers in harbour environments usingpassive acoustic detection. The goal was to achieve as high detection as possiblewithout having too high false alarm rate. A short execution time was also desirable.By using the characteristic of an inhalation a band-pass filter was applied to the signalto improve the signal to noise ratio. After the filtering an energy estimation of thesignal was made. This energy estimation was later used in a frequency analysis, whichcould tell us if there were enough energy in the frequencies that correspond to adivers breathing frequency.

?TRO OCH TVIVEL? En studie om kristen tro i ett en g?ng sekul?rt men numera postsekul?rt Sverige

This thesis explores how participants and leaders in ?Alpha?, an introductory course to the Christian faith, relate to and practice faith in Sweden. Sweden has often been viewed as a secular country where religion has been seen as irrational, outdated, and as something that belongs to the other but not to the self. Through the eyes of Swedish Christian practitioners, this study explores what kind of relationship my informants have to Christian faith and God while also exploring how living in a secular or post-secular context affects their way of believing and interpreting God and the stories written in the Bible. Furthermore, understanding of the Bible is viewed in the light of the concepts ?mythos? and ?logos? which highlights where Western explanatory models fail to explain and understand mythological stories.

Passive acoustic diver detection

This report discusses a method to detect divers in harbour environments usingpassive acoustic detection. The goal was to achieve as high detection as possiblewithout having too high false alarm rate. A short execution time was also desirable.By using the characteristic of an inhalation a band-pass filter was applied to the signalto improve the signal to noise ratio. After the filtering an energy estimation of thesignal was made. This energy estimation was later used in a frequency analysis, whichcould tell us if there were enough energy in the frequencies that correspond to adivers breathing frequency.

Nyintroduktioner pa? den svenska aktiemarknaden : Bo?rstrendens betydelse fo?r nyintroduktioners la?ngsiktiga prestation

Tidigare forskning visar att nyintroduktioner o?veravkastar den fo?rsta handelsdagen men underpresterar relativt ett ja?mfo?rande index pa? la?ngre sikt. Enligt den effektiva marknadshypotesen a?r det inte mo?jligt att fo?rutse prisro?relser i marknaden med hja?lp av information som redan a?r tillga?nglig fo?r allma?nheten. Denna studie underso?ker om det finns en avvikelse fra?n den effektiva marknadshypotesen pa? den svenska aktiemarknaden fo?r nyintroduktioner beroende pa? bo?rsens trendla?ge.

Mekanismer för inaktivering av lipoproteinlipas i 3T3-L1 celler : En studie av hur aktiviteten regleras med Angiopoietin-likt protein 4, Actinomycin D och Tumor Necrosis Factor alpha

Denna studie undersöker hur stressfaktorer påverkar kroppen vid dykning i gruva. Undersökningen genomfördes under en helgs intensivt dykande, för att bestämma lungkapacitet, pulsnivå samt eventuell vätske- och viktförlust hos dykarna. Testerna bestod av vägning, spirometritester och pulsmätningar. Testpersonerna dök mellan ett till tre dyk under helgen. Två av det totala antalet dyk var på 74 meters djup, resterande dyk genomfördes på 36 meters djup.

Utveckling av mätvariabler för arbetsmotivation i ett föränderligt arbetsliv

Förändringar i arbetslivet, som påverkar individers drivkrafter kring arbetsmotivation, gör det relevant att undersöka hur mätvariabler kan anpassas till ett modernt arbetsliv. Med utgångspunkt i Herzbergs tvåfaktorteori, var syftet att kvantitativt pröva variablerna karriärsutveckling och kvalitet i produkt eller service, kopplat till arbetsmotivation. Studiens enkät reducerades till 10 items efter utförd faktoranalys, och ytterligare analyser fokuserade på de högsta laddningarna. För karriärsdimensionen (alpha 0,90) var det karriär som viktig del i yrkesval, möjligheter till karriärsutveckling och viljan att stanna i organisationer med möjlighet till avancemang, vilket antyder att den moderne arbetstagaren väljer yrke eller arbetsplats efter karriärsförutsättningar. Kvalitet i prestationer som bidrag till kvalitet i organisationens resultat och strävan efter kvalitetsförbättring av organisationens produkt eller service var mest framträdande i kvalitetsdimensionen (alpha 0,55).

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