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164 Uppsatser om Strain gauge - Sida 1 av 11

Impulsmätning medelst gradvis deflektion av alla sprayer från högtrycks common rail spridare

A method for measuring the total impulse from a multi hole diesel injector, introduced inprevious thesis work, ?Development of a method and a device for measuring the momentumrate of fuel sprays?, by Mikael Lindström, has been further developed and tested. The conceptis to simultaneously deflect all sprays from a multi hole diesel injector by using a bell shapeddeflector. The fuel sprays are deflected straight down from their initial umbrella angle, andthe resulting deflection force is measured in a thin strained section of the load cell. The strainis given by three Strain gauges, with quarter-bridge circuitry for each gauge.

How to build a rein tension meter

A large part of the interactions between horse and rider during horseback riding takes place through the reins and the bit and devices for measuring the tension on the reins, rein tension meters, has fairly recently been developed. To safeguard the welfare of the ridden horse riders need to be aware of the rein tension they apply and actively work to decrease it. Furthermore, there is a need to develop the study of rein tension through new techniques and refined analysis procedures. A good-quality rein tension meter should be small in size, sensitive, durable and as accurate for light rein tension as for strong forces. Rein tension meters used in research on horse and rider interaction commonly depend on Strain gauge technique for generating rein tension data.

Differences in host plant preferences and olfactory physiology between populations of the moth Spodoptera littoralis established in Egypt and Benin

This study was made to compare and distinguish any differences in olfactory recognition and host plant adaptation between two strains of cotton leaf worm, Spodoptera littoralis. The populations used were established in Egypt and Benin, Africa. The documentation consisted of information about (1) each of the strains development through the larval stage up to pupation on diets of cotton, clover and cowpea. (2) Their oviposition preferences as adults between cotton, clover, cowpea, maize and cabbage. (3) Electroantennographic recordings to quantify any possible responses to plant volatiles. Throughout the diet experiments the larvae from the Benin strain showed significantly a better development between artificial, clover, cowpea and cotton respectively, while the Egypt strain had significance between artificial, cotton and cowpea/clover as diet. Also noted was how the strains substantial development of weight differentiated if fed the cotton diet, followed by the cowpea diet showing that the Benin strain would develop a higher body mass on a cotton diet as well as on a cowpea diet. This trend was however switched once the pupal stage was reached, where the Egyptian strain contained a significantly greater body mass than the Benin strain on the artificial and the Benin strain a greater on cowpea, which suggests that in the end, the Benin strain develops significantly better on cowpea while the Egypt strain develops better on an artificial diet. During the oviposition experiment that both stains showed a clear difference in hierarchy of host plants considered suitable for oviposition, where the Egyptian strain is significantly more attracted to clover than the Benin strain. Also showed with electroantennographic recordings and significant values was the higher sensitivity the Egypt strain had towards (E)2-hexenal, (E/Z)-b-ocimene, (Z)-3-hexenyl acetate, Nonanal, (-)-linalool and ?-myrcene when compared to the responses from the Benin strain..

Lastcells applikation : Verktyg för montering av trådtöjningsgivare i lastcell

Ett verktyg för applicering av trådtöjningsgivare har tagits fram på uppdrag av AED AB i Växjö. Verktyget skall användas för färdigställning/slutmontering av lastceller som i sin tur skall användas till att mäta vilka krafter som påverkar en skogsmaskin när denna lastas med sin givna maxlast. Verktyget skall föras in i ett 25 mm brett hål där det skall hålla fast och lägga tryck på fyra trådtöjningsgivare, en i vardera riktning, vilka bestrykts med lim. Verktyget skall hålla ett tryck på tre till fyra kiloPond medan lastcellen värms till 150° C då limmet härdar. Verktyget består av fyra ben, ett i vardera riktning.

Lastcells applikation : Verktyg för montering av trådtöjningsgivare i lastcell

Ett verktyg för applicering av trådtöjningsgivare har tagits fram på uppdrag av AED AB i Växjö. Verktyget skall användas för färdigställning/slutmontering av lastceller som i sin tur skall användas till att mäta vilka krafter som påverkar en skogsmaskin när denna lastas med sin givna maxlast. Verktyget skall föras in i ett 25 mm brett hål där det skall hålla fast och lägga tryck på fyra trådtöjningsgivare, en i vardera riktning, vilka bestrykts med lim. Verktyget skall hålla ett tryck på tre till fyra kiloPond medan lastcellen värms till 150° C då limmet härdar. Verktyget består av fyra ben, ett i vardera riktning.

Lycka: en studie av ekonomins inverkan på lyckan

The purpose of this study was to examine and illustrate how people look at themselves and their happiness in relation to their economic situation. This study was based on interviews with eight adults divided in two groups, four were big-income earners and four were unemployed/sick-listed. I identified factors that affected the feeling of happiness such as family, friends and economy. During the process four themes were identified, happiness, work, economic strain and the importence of money versus happiness. The analysis was based on the concept of aspiration levels and an economic perspective.The conclusion of the analysis was a surprise to me, showing that economic strain could be detected in both groups but by different means.

Hur vårdbiträde anställda i en poolgrupp uppfattar sin arbetssituation

This is a qualitative study with the aim to find out how caregivers in a resourcegroup experince their work situation. We wanted to know how they where treated by the ordinary staff and what strains and possibilities they can encounter in their daily work. We used semistructured interviews to answer our questions.We found out that the ordinary staff of caregivers always treated the resourcegroup like one of them. A strain that the resourcegroup experienced was the shortage of time which sometimes resulted in that they felt stressful. The resourcegroup work on different floors each day, giving them a chance to see and learn new things.

Investigation of yeast Grown in SSF Dring Biothanol Production from Lignocellusosic Material

Ethanol produced from lignocellulosic biomass has the potential to become a promisingalternative to gasoline. In this work the simultaneous saccharification and fermentation (SSF)technology was applied for ethanol production from hardwood with focus on cell growth,ethanol production and contamination.The SSF was performed at PH 5.5 and 35°C for different suspended solid concentrations(8%, 10% and 12%) of pretreated birch slurry which contained 16 % total suspended solids.Two different hexose fermenting yeast strain (Ethanol Red) and pentose fermenting yeaststrain were used.Quantifying the concentration of chemical components and metabolites in the fermentationmedium demonstrated that glucose and xylose are the major fermentable sugars in the slurry.The higher load of slurry (12%) represents a higher content of carbohydrates and potentiallyhigher end concentration of ethanol. Moreover, more lactic acid is produced with the lowerload of slurry (8 % or 10 %), presumably due to a result of a less inhibitory environment forbacterial growth. In this context, acetic acid sticks out as the most important inhibitor withconcentrations of 15.2 and 12.5 and 9.7 g/l respectively in the 12 %, 10 % and 8 % (ofsuspended solids) trials. Using pentose fermenting yeast may lead to higher ethanolproduction, lower xylose uptake and lower lactic acid formation.

Strain gauge med kvicksilver vs Fotocell : En jämförelse av uppmätt tåtryck mellan de två metoderna

Syftet med denna kvalitativa studie är att studera blivande psykoterapeuters motiv att utbilda sig till psykoterapeuter och att undersöka om de angivna                      motiven skiljer sig åt beroende på grundutbildning och val av teoretisk inriktning på studierna. Studien genomfördes med hjälp av en enkät där deltagarna i undersökning fick svara på öppna frågor om motiv som fått dem att söka psykoterapeututbildningen samt gradera hur deltagarna stämde in i ett antal tänkbara motiv att välja att utbilda sig till psykoterapeut. Med en kvalitativ ansats och genom att företa en induktiv analys av resultatet kunde tretton temakategorier som motiverar att välja psykoterapeutyrket upptäckas; ökad kunskap, ökad kompetens och bättre behandlingsresultat, personligutveckling/personliga egenskaper, karriär/arbetslivssituation, autonomi, status/ekonomi, att komma vidare i en yrkesroll,legitimation/legitimitet, påverkan av en signifikant person eller litteratur,altruism, försvar och egna svårigheter, förväntade belöningar samt ökad tryggheti arbetet. Blivande psykoterapeuter med psykodynamisk eller relationell inriktning angav i större utsträckning motiv som kunde relateras inre konflikter och svåra erfarenheter i livet än vad dem med kognitiv                       beteendeterapeutisk inriktning gjorde..

?Förlorad är varje dag då man inte dansat!? : En studie av balansen mellan träningsbelastning och återhämtning på Balettakademiens yrkesutbildning i Stockholm

AimThe purpose of this study was to examine the relationship between physical strain and recovery in dancers at The Ballet Academy in Stockholm, Sweden. Research questions used to guide the study were: How great is the dancers experience of physical strain? Do any of the dancers show mental or physical signs of overtraining syndrome?MethodPhysical strain was studied by letting the dancers fill out a booklet catloging their intensity during practice. Utilizing a questionnaire, data was gathered regarding preceding year. To give more nuance to the data gathered, The Profile of Mood States was used to detect possible mood disturbance.

Utvärdering av röstträning på logopedprogrammet i Göteborg

The purpose of this study was to examine if there were anychanges in quality in the voices of speech and language pathology studentsafter four years of study at the University of Gothenburg. Recordings oftwenty student voices from the first and eight semesters were evaluatedperceptually by six speech-language pathologists. The parameters judgedwere: vocal fry, glottal attacks, strain, breathiness and resonant voice, usinga scale from 0 to 10. Acoustical measures were made of F0 mean andmedian to detect possible differences between the two recordings. Theresults show a significant decrease in vocal fry, glottal attacks and strain aswell as an increase in resonant voice and a significant decrease in F0 meanand median.

Djursjukskötarutbildningen och legitimationen

January the 1:st 2010 Veterinary Nursing became a registred vocation in Sweden, this paper attempts to give some back-ground to this decision and tries to gauge the opinions of companies and organisations representing workers and employers in the animal health-care field on the possible effects of registration. Working Veterinary Nurses and Veterinarians have been surveyed to find out what they think the responsibilities and education of the Registred Veterinary Nurse should be..

Undersökning av steady state och utvärdering av valskraft och friktion vid kallvalsning av aluminium

The purpose with this thesis was to examine the cold rolling mill located at Högskolan Dalarna and to stabilize the rolling process, to achieve steady state. Experiments with cold rolling of an aluminium strip have given results for rolling force, friction, reduction, strip tension and strain hardening. Results show that steady state has been found for the experiments with roll force and strain hardening, and not been found for the experiments with friction and reduction. Results show that increased strip tension gives lower roll forces. The roll force equation of Stone shows comparable results with reality for dry contact with reductions up to 30 %, but starts being incomparable with higher reductions.

Girls just wanna have fun - Tjejers rätt till tjejgrupper

The purpose of this essay is to examine how girls groups, particularly in school, can help girls with feelings of stress and pressure they can experience in their everyday life. We also want to examine how girls groups can be used, and explain why they should be held in school and not only in other organizations. The information we?ve gathered comes from books and websites that cover the subject. In addition to this, we?ve also handed out surveys and implemented interviews with both younger girls with girls groups experience, a teacher and a youth recreation leader. The theoretical aspect of this essay stems from two different theories: Labeling theory and Strain theory.

Iron bioavailability and pro- and prebiotics

Iron deficiency is one of the most frequent micronutrient deficiencies around the world. Low iron bioavailability simultaneously with a high iron requirement is a high risk factor for developing iron deficiency. Probiotics are microorganisms that confer a health benefit on the host. Prebiotics are oligosaccharides which provide a health benefit on the host due to a positive modulation of the microflora in the gut. The aim of this paper is to evaluate if there is a connection between pro-and/or prebiotics and iron bioavailability.

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