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161 Uppsatser om Shock wave - Sida 2 av 11

Utveckling och konstruktion av dämpare och låssystem för vågkraftverk

The division of Electricity at Uppsala University is developing a wave energy converter(WEC) consisting of a linear generator connected to a bouy at the water surfacethrough a wire cable called the connection line.During extreme conditions, the wave power plant will experience forces up to 500kN, which lead to unnecessary wear and will ultimately cause the failure of theconverter. To prevent this there is a need for a damper.The wave energy converter works at a maximum efficiency when the translator?sare centered with respect to the stator. Due to tidal movements the position of thetranslator can deviate. There for a mechanical divice that will compensate for this isneeded.This report describes the further development of an earlier project where a tidalwave compensator for a wave energy converter of Seabased AB was developed.

Affärssystem - En studie om tiden efter införandet

De fördelar och värde som ett affärssystem kan bidra med till verksamheten uppstår inte automatiskt när det tas i drift. Det krävs ett fortsatt utvecklingsarbete av system, processer och organisation för att fördelarna ska synas. Studiens syfte har varit att få fram vilka aspekter som är viktiga att ha i åtanke kring fortsatt utvecklingsarbete av ett affärssystem. Därigenom har vi skapat oss en förståelse för hur företag arbetar i Second Wave samt hur teorin förhåller sig till praktiken. Det empiriska materialet har inhämtats genom kvalitativa gruppintervjuer på två stora svenska företag med sammanlagt elva respondenter.

Magomvridning :

The purpose of the study was to review the current veterinary literature regarding gastric dilatation and volvulus (GDV) considering pathophysiology and treatment, and to evaluate the operative technique (incisional gastropexy) used during the years 2005 and 2006 at the University Animal Hospital (Universitetsdjursjukhuset), SLU, Uppsala, Sweden. GDV has a complicated pathophysiology which foremost effects the circulatory system. Progress is often acute and it is not unusual that patients are affected with shock. The initial treatment targets to alleviate the shock by fluid therapy and decompression of the stomach. There is a high risk of recurrence in the long term perspective unless the stomach is surgically fixated by gastropexy. The study describes two different techniques for gastropexy; incisional gastropexy, and funduspexy. Long term complications were rare among the patients that were treated surgically, while about half out of the eighteen dogs that undergo surgery do experience complications of various severity in the short term..

Analys av instyrning och rolldynamik

When driving hard and cornering on a circuit good control of a car?s roll is desired, so the car reaches steady state quickly but yet in a controlled fashion. This control is mainly given by the combination of the cars springs, shock absorbers and anti-roll bars.The aim of this report is to investigate, analyze and measure a Porsche Boxster?s turn in behaviour and roll dynamics as well as with the aid of simulation results give suggestions for improvement of the previous mentioned combination.Two different simulations were made, one based on a simpler model that was based on an evolved version of the bicycle model in Matlab and one was more advanced model in the simulation software rFactor. Measurements of the real car was made using a GPS-based measurement system.

Fokuserad shock wave behandling vid kronisk plantar fasciit : En randomiserad jämförande klinisk studie

Bakgrund: Patient i hemodialys (HD) behandling är utsatt olika stressfaktorer, som tillexempel den strikta diet, begränsat vattenintag, bundenhet till dialysenhet eller känsla avtrötthet även på dialysfria dagar. Cirka 20 procent patienter i HD behandling utvecklardepression som i sin tur leder till låg plasma albumin.Syftet: Att belysa samband mellanstressfaktorer, depression, låg plasma albumin och mortalitet/morbiditet samt omvårdnadensbetydelse för patienter i hemodialysbehandling.Metod: Studie genomfördes som enlitteraturöversikt och granskning av vetenskapliga artiklar.Resultat: Resultat baserar på 15artiklar, varav 1 kvalitativ, 14 kvantitativ. Resultatet delades i fem kategorier: stressfaktoreroch deras koppling till depression, depression, låg plasma albumin, omvårdnadsåtgärder vidlåg plasma albumin, omvårdnadsåtgärder vid depression.Diskussion: I diskussion lyfts uppsamband mellan högre morbiditet/mortalitet och depression samt låg plasma albumin hospatienter i HD behandling. Det tas upp även vikten av omvårdnadsinsatser vid depression ochlåg plasma albumin hos patient i HD behandling.Slutsats: Mer forsknings behövs för attsjuksköterska kan erbjuda patienten effektiva strategier som hjälper denne att hantera destressfaktorerna och livsstilförändringar som HD innebär..

Price transmission dynamics of Chinese ADRs listed on the NYSE

Purpose: This study aims to examine the price transmission among ADRs (American Depositary Receipts) and their underlying shares, US market index and Hong Kong market index. We will attempt to capture how a shock in the home market is transmitted to the foreign (and vice versa). In addition we will attempt to assess the relative weight of each variable in the system generating unexpected variations of its own and other variables and at what speed the shocks are absorbed.Methodology: ADF unit root test, Johansen?s co-integration test, Granger causality test, VECM, impulse response, variance decomposition Empirical foundation: Five Chinese ADRs listed on the New York Stock Exchange. Each ADR represents a specific industry.

Går det att mäta blodtryck med fotopletysmografi och bioakustisk sensor i kombination?

The aim of the work was to investigate the possibility to combine information from PPG and bio-acoustic technology to extract information that is related to the blood pressure. The measurements have been carried out with several different configurations. First the relation between arterial sounds and the PPG-signal was studied. After those measurements with both PPG and the bio- acoustic technique was concluded on people in different positions and after riding a bike. The goal was to vary the blood pressure.

Demokrati, diktatur eller demokratur? : En kvalitativ studie av den demokratiska tillbakagången i Vitryssland

This is a study about the transition process and the consolidation of power in Belarus. In this paper the concept of "authoritarian state building and the sources of regime competitiveness in the fourth wave" is the major theory used. After giving a description of the theory?s concepts a short historical background of Belarus follows. Chapters four describes and explain the political situation in Belarus during five periods.

Elektromekanisk växel för tunga lyft : Konceptutveckling

The basis of the study lies with a newly patented gearbox by cardiologist and inventor Stig Lundbäck. Stig founded CorPower Ocean AB to further develop the gearbox to be used in a wave energy device. The purpose of this project is to develop a concept of a lifting system with CorPower Oceans gearbox that is more energy efficient than a hydraulic lifting system. The goal is to use technology from CorPower Oceans gearbox inversely to perform heavy lifting as an alternative to hydraulics. The project is limited to applying the gearbox and gear rack on a forklift with a lifting capacity of ten tons.The main tool in this project will be the product development process Systems Engineering where only the most relevant parts will be used to develop a concept.

Lärande i andra vågen : En studie om lärande inom företag efter implementering av nytt affärssystem

Introducing a new type of IT-structure means a change that employees within an organization must adapt to. Today, many companies have implemented information technology in the form of Enterprise Resource Planning (ERP) Systems and find themselves in th so-called Second Wave stage where an after work is ongoing with continual improvement that involves changes that employees need to understand and act upon. To learn how to work with these recurrent misadventures is of importance because it is seen as a critical factor in order to take advantage of the ERP system and its benefits. To study this a study was conducted through personal interviews at Apoteksgruppen AB which a few years ago introduced a new ERP system. There the authors saw that employees learned in different ways depending on the position, and that the more responsibility this person had the greater freedom this person had to resolve their problems and therefore learned more effectively.

Studentdrivna onlinediskussioner i högre utbildning - En studie om skolrelaterade diskussioner på Facebook, Google Wave och IRC

Studier på universitetsnivå omfattar oftast mycket eget ansvar och individuellt arbete. På samma gång hörs röster om kollaborativt lärande och gruppkognition där studenter lär bättre när de arbetar tillsammans. I min förstudie intervjuas 4 studenter på det systemvetenskapliga programmet vid IT-universitetet i Göteborg om sitt laptopanvändande i skolan. I intervjun framkommer de att många av studenterna i årskursen på eget initiativ startat kollaborativa mötesplatser för att kunna arbeta och diskutera tillsammans med sina klasskamrater online utan lärares interaktioner. Efter vidare undersökning framkommer det att sådana mötesplatser finns hos alla de tre årskurserna på det systemvetenskapliga programmet.

Akutsjukvård : cirkulationsrubbningar-symtom, orsaker och åtgärder

The cardiovascular system is one of the three major body systems. When an animal in a critical state arrives at the animal hospital, it is important to know the normal parameters in order to assess the patient?s cardiovascular status. Triage is a process where you considerate the patient?s condition instead of check in time, or other criteria.

Canine S- and M/L- cone electroretinograms

Full-field flash electroretinography is an electrodiagnostic method used to examine the function of retinal cells. Light stimulation of the eye elicits electrical potentials in the retina. By aid of a corneal electrode and a reference electrode close to the back of the eye, the electrical potentials can be recorded and presented as an electroretinogram (ERG). ERGs driven by mainly one type of cones can be used to examine the function of a single cone class. In human beings, studies have shown the cone class sensitive to light of short wavelengths, the S-cones, to be more vulnerable to acquired damage than the other cone classes (Daley et al., 1987; Gouras et al., 1993; Greenstein et al., 1989). Dogs have two cone classes, S-cones, and M/L-cones (most sensitive to medium to long wavelengths).

Vegetationslösningar och andra metoder mot stranderosion :

Today 70 percent of the world's sand beaches are under recession due to erosion. The global warming may have the effect upon the sea level increasing and the erosion increasing on the sand beaches. To save these sand beaches, the erosion must be prevented. Coast erosion shelters like gabions and sea walls are functioning extremely well to protect the land behind the sand beach, but due to the wave reflections, created in front of these so called hard erosion shelters, the erosion of the front beach is accelerated. During the last decades, artificial sand supply (beach nourishment) has been the adopted praxis.

Underlag för framtagning av målningslina : Hantering och layout

Seabased Industry AB develops system for extracting electrical energy from ocean waves with a Wave Energy Converter (WEC). The components is bought from subcontractors and then assembled into wave energy converters, buoys and marine substations by Seabased. In the future Seabased will produce more of the components themselves to reduce costs and to have better control over tolerances. The production line will also include the painting of the WECs and substations, which is performed in a painting line.The purpose of this thesis work is to study what is required to build a painting line, regarding the types of stations, transporting types and the space needed. This will result in layouts for the painting line.To receive the necessary information about production theory and corrosion and surface treatment, literature concerning this area has been studied.

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