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569 Uppsatser om Mechanical fatigue - Sida 7 av 38

Mekaniskt snytbaggeskydd

Insecticides will be removed from Swedish forestry, at present insecticides are used to treat our seedlings to avoid them from being attacked by pine weevils. With the forthcoming ban on insecticides alternative protective measures will have to be tested. Holmen Forest Ltd has aimed to find an alternative and have developed a mechanic pine weevils protection accessory as well as a new concept on planting pipes. Studies have been conducted on the behalf of Holmen Forest Ltd to see how planting with the newly developed mechanical protectors and plant pipe stands up against the conventional methods used today. The study was conducted over a three week period. Three factors were compared regarding planting quality including i) pressure around the plant, ii) the depth the plant ended up in, iii) plant angle. Mechanical plant pipes were used in the study, and where tested like a one-handed and a two-handed pipe. The study concludes that further development is needed for the mechanic plant protector to live up to the speed and quality of conventional methods.

Configuration management system för Moderna Museet

This thesis of 15 hp has been implemented at Halmstad University, incollaboration with Saab Dynamics in Linköping. Saab Dynamics is a companyoperating in the defence industry where competition is tough. This necessitatesnew ways to increase efficiency in the company, which is the basis for this thesis.Saab Dynamics wants to introduce simulation driven design. Since SaabDynamics engineers have little experience of simulation, required a usermethodology with clear guidelines. Due to lack of time, they chose to assign thetask to students, which resulted in this thesis.The aim of the thesis is to develop a methodology in mechanical design, wherethe designer uses the FE analysis early in the design process to develop thestructures' mechanical properties.

Lean för kortare väntetid till strålbehandling : Förbättringsarbete och enkätstudie hur det påverkar arbetsmiljön

The aim of the study was to explore the methods used in horticultural therapy gardens in rehabilitating people suffering from fatigue syndrome. Nine horticultural therapy gardens were contacted of wich three chose to participate. Using case study as method e-mail interviews was carried out with the participants about their establishment and what kind of theories they based their methods upon. The material collected from the interviews was complemented with additional data from the establishments web pages and information pamphlets. Collected data was processed trough content analysis and then formed as background for the development of a program theory for horticultural therapy.

Vision eller Verklighet ? Vad säger kontoret om företaget som sitter där?

This thesis of 15 hp has been implemented at Halmstad University, in collaboration with Saab Dynamics in Linköping. Saab Dynamics is a company operating in the defence industry where competition is tough. This necessitates new ways to increase efficiency in the company, which is the basis for this thesis. Saab Dynamics wants to introduce simulation driven design. Since Saab Dynamics engineers have little experience of simulation, required a user methodology with clear guidelines.

Kvinnors upplevelse av att leva med reumatoid artrit: en litteraturstudie

Reumatoid artrit är en inflammatorisk kronisk systemsjukdom som påverkar drabbade kvinnors dagliga liv. Syftet med denna litteraturstudie var att beskriva kvinnors upplevelser av att leva med Reumatoid artrit. För att få en djupare förståelse studerades sju vetenskapliga artiklar som motsvarade vårt syfte och de analyserades enligt kvalitativ innehållsanalys med manifest ansats. Analysen resulterade i fem kategorier: smärta och fatigue dominerar livet och leder till hjälplöshet och rädsla, uppleva frustration över kroppens begränsningar och deformeringar, sjukdomens negativa inverkan på sociala roller och relationer, missnöje och besvikelse över sjukvårdspersonal och medicinering samt försöka acceptera sjukdomen och hitta överlevnadsstrategier. Studien visade att sjukdomen påverkade kvinnornas liv på olika plan.

Kvinnors upplevelse av att leva med reumatoid artrit: en litteraturstudie

Reumatoid artrit är en inflammatorisk kronisk systemsjukdom som påverkar drabbade kvinnors dagliga liv. Syftet med denna litteraturstudie var att beskriva kvinnors upplevelser av att leva med Reumatoid artrit. För att få en djupare förståelse studerades sju vetenskapliga artiklar som motsvarade vårt syfte och de analyserades enligt kvalitativ innehållsanalys med manifest ansats. Analysen resulterade i fem kategorier: smärta och fatigue dominerar livet och leder till hjälplöshet och rädsla, uppleva frustration över kroppens begränsningar och deformeringar, sjukdomens negativa inverkan på sociala roller och relationer, missnöje och besvikelse över sjukvårdspersonal och medicinering samt försöka acceptera sjukdomen och hitta överlevnadsstrategier. Studien visade att sjukdomen påverkade kvinnornas liv på olika plan.

Upplevelsen av att vara amputerad : en litteraturstudie

Bakgrund: Fibromyalgi är ett syndrom och ett kroniskt tillstånd som orsakar smärta, ömhet och stelhet i rörelseorganen. Fibromyalgi karaktäriseras också av sömnstörningar, fatigue, ångest, depression och problem med tarmfunktionerna. Syfte: Att beskriva kvinnors upplevelser av att leva med fibromyalgi och vilka copingstrategier de använder för att hantera sin situation. Metod: Litteraturstudie med deskriptiv design. Resultat: Kvinnor med fibromyalgi upplevde en oförutsägbar fluktuerande och utbredd smärta, en ständigt närvarande fatigue, stelhet samt kognitiva svårigheter.

Shooting Target - Konstruktion : Product Development

The shooting sport is one of the most widespread sports in the world and it isbeing practice in most countries. Based on their own experiences, in competition -and hobby shooting, the client M4Solutions found a demand and need for ashooting target that is manufactured in Sweden.The purpose of the project has been to develop, with the help of Marcus Walldén,two shooting targets from idea to finished product. These two shooting targets,Plate Rack Target and Dueling Tree, would each be equipped with a mechanicalresetting system but will in the future have the ability to be provided with anelectronic resetting system.The project from the client was divided into two theses. One of these two, writtenby Marcus Walldén, focused on the tripod parts and the overall design work forboth Plate Rack Target and Dueling Tree. The thesis that is presented in thisreport have focused on resetting systems, the design of protective plates and otherperipherals for both shooting targets.This work has primarily been in CAD environment where design, constructionand development has been given free rein.

Börsintroduktioner av fastighetsbolag ? En studie av 8 fastighetsbolag på Nasdaq OMX Stockholm

This thesis of 15 hp has been implemented at Halmstad University, in collaboration with Saab Dynamics in Linköping. Saab Dynamics is a company operating in the defence industry where competition is tough. This necessitates new ways to increase efficiency in the company, which is the basis for this thesis. Saab Dynamics wants to introduce simulation driven design. Since Saab Dynamics engineers have little experience of simulation, required a user methodology with clear guidelines.

Tekniken bakom den digitala filmtekniken : Vilka tekniska faktorer ligger till grund för den digitala revolutionen inom den professionella kameratekniken?

This thesis of 15 hp has been implemented at Halmstad University, incollaboration with Saab Dynamics in Linköping. Saab Dynamics is a companyoperating in the defence industry where competition is tough. This necessitatesnew ways to increase efficiency in the company, which is the basis for this thesis.Saab Dynamics wants to introduce simulation driven design. Since SaabDynamics engineers have little experience of simulation, required a usermethodology with clear guidelines. Due to lack of time, they chose to assign thetask to students, which resulted in this thesis.The aim of the thesis is to develop a methodology in mechanical design, wherethe designer uses the FE analysis early in the design process to develop thestructures' mechanical properties.

Höghöjdsflygning & strukturella batterier : En konceptstudie i flygteknik

This report is written in the purpose to investigate the mechanical forces and characteristics related to a propeller driven aircraft in the Earth?s atmosphere. It?s written as a thesis project during the spring semester of 2014 and graded accordingly.Thanks Arne Karlsson for fruitful discussions. Also thanks to Simon Leijonmarck for help with useful discussions concerning structural batteries..

Volatilitetsprognoser på den svenska aktiemarknaden: Tillämpning av Arch Typ modeller

This thesis of 15 hp has been implemented at Halmstad University, in collaboration with Saab Dynamics in Linköping. Saab Dynamics is a company operating in the defence industry where competition is tough. This necessitates new ways to increase efficiency in the company, which is the basis for this thesis. Saab Dynamics wants to introduce simulation driven design. Since Saab Dynamics engineers have little experience of simulation, required a user methodology with clear guidelines.

Reliabilitet och validitet av två svenska versioner av Fatigue severity scale vid mätning av trötthet hos patienter med systemisk lupus erythematosus

Syftet med denna studie var att testa och beskriva aspekter av reliabilitet och validitet av två versioner av Fatigue Severity Scale (FSS) på svenska, FSS 1 och FSS 2, vid mätning av trötthet hos patienter med systemisk lupus erythematosus (SLE). Metod: Två grupper av patienter med stabil SLE, låg sjukdomsaktivitet och liten organskada inkluderades. Diskriminant validitet för FSS 1 testades på 32 kvinnor med SLE och 35 friska kvinnor. Följande test av FSS 1 och FSS 2 gjordes på 23 patienter med SLE: Tak- och golveffekter, intern konsistens, stabilitet över tid (test-retest) samt innehållsvaliditet uttryckt som faktoranalys och innehållsvaliditet sett ur patienternas perspektiv vad gäller FSS 2. Resultat: FSS 1 kunde signifikant särskilja kvinnor med SLE från friska kvinnor.

Osäkerhet i investerares avkastningsbedömning av kommersiella fastigheter. - Osäkerheter i bedömningen av drift- och underhållskostnader?

This thesis of 15 hp has been implemented at Halmstad University, in collaboration with Saab Dynamics in Linköping. Saab Dynamics is a company operating in the defence industry where competition is tough. This necessitates new ways to increase efficiency in the company, which is the basis for this thesis. Saab Dynamics wants to introduce simulation driven design. Since Saab Dynamics engineers have little experience of simulation, required a user methodology with clear guidelines.

Skadliga nollflödespunkter i Fortum Värmes fjärrvärmenät i Stockholm : En analys av dess förekomst och effekter

When several production units provide a district heating network, water is pumped from different directions. When the flows from the plants finally meet in the network, the water can be completely still. These places are called zero flow zones. In district heating networks with several plants, which also have different supply temperatures, large and frequent temperature fluctuations can occur when the zero flow zones move. This may cause wear on the pipes, a phenomenon called low cycle fatigue.For this reason it is important to examine where and when zero flow zones that cause temperature changes occur.

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