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Dissertations / Theses on the topic 'VAWT'

Author: Grafiati
Published: 4 June 2021
Last updated: 25 July 2025

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1

Hikkaduwa, Vithanage Ajith. "DESIGN AND PERFORMANCE ANALYSIS OF PITCHED-PLATE VERTICAL AXIS WIND TURBINE FOR DOMESTIC POWER GENERATION." Thesis, Högskolan i Gävle, Avdelningen för bygg- energi- och miljöteknik, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-17428.

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Wind energy is identified a promising energy resource in Sri Lanka. Therefore, it is important to use proper technologies for efficient energy capturing in order to minimize cost of energy. Small scale wind turbines are usually installed in constricted places (particularly in urban areas) where wind flow is turbulent and difficult to predict. Savonious type vertical axis wind turbines are important due to several reasons such as good response to turbulent winds, high initial torque, low cost, low noise, less maintenance.In this study, a modified flat plate type Savonius wind rotor was proposed
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Taylor, Katharin C. "Method for VAWT placement on a complex building structure." Monterey, California: Naval Postgraduate School, 2013. http://hdl.handle.net/10945/34752.

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This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. As such, it is in the public domain, and under the provisions of Title 17, United States Code, Section 105, it may not be copyrighted.<br>Approved for public release; distribution is unlimited<br>This thesis is part of a larger project that will demonstrate the feasibility of powering a commercially sized 7.5-ton cooling system. Excess cooling will be stored thermally using ice. This system has the potential to be used in military bases to reduce energy costs and fossil fuel consumption.
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Wahlberg, Nils. "Konstruktion av statorstomme för synkrongenerator : Förslag på design av statorstomme för användning i vertikalaxlade vindkraftverk." Thesis, Uppsala universitet, Elektricitetslära, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-207778.

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This thesis describes a conceptual design of a support frame for a synchronousgenerator used in a vertical axis wind power plant. In this system the generator isplaced on ground level. The thesis also considers the design of housing for thesupport frame and generator. The concept presented in this report is based on anearlier design. Besides geometric design, simplified simulations has been run in orderto optimize some of the parts included in the construction considering naturalfrequencies and structural strength. The result is presented as CAD-models andan assembly drawing.
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Zhao, Jiaming. "Experimental Study of Effects of Leading-Edge Structures on the Dynamic Stall of a Vertical Axis Wind Turbine Airfoil." Thesis, North Dakota State University, 2020. https://hdl.handle.net/10365/32053.

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Vertical axis wind turbine, developed as one of the main methods to utilize the wind energy, has a promising future; however, the major issue to limit its performance is the uneven loading on the blade during operation. Flow control mechanisms have been employed in the aerodynamic field to improve the performance of airfoils. In this study, two types of leading-edge structures, including flexible leading-edge and leading-edge roughness, are experimentally investigated to analyze their effects on altering the aerodynamic characteristics of NACA 0018 airfoil under steady flow condition and dynam
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Almohammadi, Khaled Mohammad. "Optimization of a CFD based design of a straight blade vertical axis wind turbine (SB-VAWT)." Thesis, University of Leeds, 2014. http://etheses.whiterose.ac.uk/7021/.

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Enhancing the extraction of the wind energy in urban regions using micro and small wind turbines becomes a necessity with the increasing power consumption. The focus of this thesis is to optimize micro and small SB-VAWT performance by analysing CFD techniques, several modelling characteristics and design parameters where the performance is measured by the power coefficient. In this thesis, the SB-VAWT is optimized by employing sophisticated optimization techniques, namely such as the GA and the NLPQL, which are employed on response surfaces created from several design sampling methods. The opt
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6

Pearson, Charlie. "Vertical axis wind turbine acoustics." Thesis, University of Cambridge, 2014. https://www.repository.cam.ac.uk/handle/1810/245256.

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Increasing awareness of the issues of climate change and sustainable energy use has led to growing levels of interest in small-scale, decentralised power generation. Small-scale wind power has seen significant growth in the last ten years, partly due to the political support for renewable energy and the introduction of Feed In Tariffs, which pay home owners for generating their own electricity. Due to their ability to respond quickly to changing wind conditions, small-scale vertical axis wind turbines (VAWTs) have been proposed as an efficient solution for deployment in built up areas, where t
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Bülow, Fredrik. "A Generator Perspective on Vertical Axis Wind Turbines." Doctoral thesis, Uppsala universitet, Elektricitetslära, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-197855.

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The wind energy conversion system considered in this thesis is based on a vertical axis wind turbine with a cable wound direct drive PM generator. Diode rectifiers are used to connect several such units to a single DC-bus and a single inverter controls the power flow from the DC-bus to a utility grid. This work considers the described system from a generator perspective i.e. the turbine is primarily seen as a torque and the inverter is seen as a controlled load. A 12 kW VAWT prototype with a single turbine has been constructed within the project. The power coefficient of this turbine has been
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Sjökvist, Stefan. "Demagnetization Studies on Permanent Magnets : Comparing FEM Simulations with Experiments." Licentiate thesis, Uppsala universitet, Elektricitetslära, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-236301.

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In a world where money often is the main controlling factor, everything that can be tends to be more and more optimized. Regarding electrical machines, developers have always had the goal to make them better. The latest trend is to make machines as efficient as possible, which calls for accurate simulation models where different designs can be tested and evaluated. The finite element method is probably the most popular approach since it makes it possible to, in an easy and accurate way, get numerical solutions to a variety of physics problems with complex geometries and non-linear materials. T
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Bah, Elhadji Alpha Amadou. "Numerical investigation on the use of multi-element blades in vertical-axis wind turbines." Diss., Georgia Institute of Technology, 2015. http://hdl.handle.net/1853/53501.

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The interest in sustainable forms of energy is being driven by the anticipated scarcity of traditional fossil fuels over the coming decades. There is also a growing concern about the effects of fossil fuel emissions on human health and the environment. Many sources of renewable energy are being researched and implemented for power production. In particular, wind power generation by horizontal- and vertical-axis wind turbines is very popular. Vertical-axis wind turbines (VAWTs) have a relative construction simplicity compared to horizontal-axis wind turbines (HAWTs). However, VAWTs present spec
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Du, Yingkang. "An Orthogonal Savonius-type Wind Turbine: Design and Experiments." Case Western Reserve University School of Graduate Studies / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=case1459510710.

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Halvarsson, Patrik, and Emma Larsson. "Småskaliga vindkraftverk på byggnader i urban miljö : Möjligheter och hinder för ökad implementering." Thesis, KTH, Byggteknik och design, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-127036.

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Intresset för småskaliga vindkraftverk på byggnader har ökat under de senaste åren. Allt fler människor blir mer energi- och miljömedvetna samt ser fördelarna med att elektriciteten produceras där den konsumeras; i den bebyggda miljön. Det är dock en större utmaning att installera ett vindkraftverk i urban miljö, jämfört med i öppet landskap, då det finns många faktorer som skall beaktas. Stadens komplexa uppbyggnad gör att vindens hastighet och riktning varierar och ger upphov till turbulenta strukturer i den omgivande luften. Många av dagens vindkraftverk kan ej operera effektivt vid turbule
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Möllerström, Erik. "Vertical Axis Wind Turbines : Tower Dynamics and Noise." Licentiate thesis, Högskolan i Halmstad, Energiteknik, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-242267.

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Vertical axis wind turbines (VAWTs) have with time been outrivaled by the today common and economically feasible horizontal axis wind turbines (HAWTs). However, VAWTs have several advantages such as the possibility to put the drive train at ground level, lower noise emissions and better scaling behavior which still make them interesting for research. The work within this thesis is made in collaboration between the Department of Construction and Energy Engineering at Halmstad University and the Division for Electricity at Uppsala University. A 200 kW VAWT owned by the latter and situated close
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D'Ambrosio, Marco, and Marco Medaglia. "Vertical Axis Wind Turbines: History, Technology and Applications." Thesis, Halmstad University, Halmstad University, School of Business and Engineering (SET), 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-4986.

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<p>In  this  Master Thesis  a  review  of  different  type  of  vertical  axis  wind turbines (VAWT)  and  a preliminary investigation of a new kind of VAWT are presented.</p><p>After an introduction about the historical background of wind power, the report deals with a more accurate analysis of the main type of VAWT, showing their characteristics and their operations. The aerodynamics of the wind turbines and a review of different type on generators that can be used to connect the wind mill to the electricity grid are reported as well.</p><p>Several statistics are also presented, in order to
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Apelfröjd, Senad. "Grid Connection of Permanent Magnet Generator Based Renewable Energy Systems." Doctoral thesis, Uppsala universitet, Elektricitetslära, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-304659.

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Renewable energy is harnessed from continuously replenishing natural processes. Some commonly known are sunlight, water, wind, tides, geothermal heat and various forms of biomass. The focus on renewable energy has over the past few decades intensified greatly. This thesis contributes to the research on developing renewable energy technologies, within the wind power, wave power and marine current power projects at the division of Electricity, Uppsala University. In this thesis grid connection of permanent magnet generator based renewable energy sources is evaluated. A tap transformer based grid
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15

Hořava, Pavel. "Simulace malé větrné elektrárny se Savoniovým-Darrieovým rotorem." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2014. http://www.nusl.cz/ntk/nusl-220933.

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This master‘s thesis deals with the simulation of small wind power plant with Savonius-Darrieus rotor. On the base of the actuator disk theory the performance of modeled power plant is predicted in theoretical part and the power coefficient as well. The process of designing the wind model is also described in this theoretical part. The practical part of this thesis is dedicated to the creating a model of DS300 vertical axis hybrid wind turbine in Matlab/Simulink. This model was used to generating of the power curve of modeled wind power plant and for the computing of power and total produced e
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Kjellin, Jon. "Vertical Axis Wind Turbines : Electrical System and Experimental Results." Doctoral thesis, Uppsala universitet, Elektricitetslära, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-182438.

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The wind power research at the division of Electricity at Uppsala University is aimed towards increased understanding of vertical axis wind turbines. The considered type of wind turbine is an H-rotor with a directly driven synchronous generator operating at variable speed. The experimental work presented in this thesis comprises investigation of three vertical axis wind turbines of different design and size. The electrical, control and measurement systems for the first 12 kW wind turbine have been designed and implemented. The second was a 10 kW wind turbine adapted to a telecom application. B
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Jaohindy, Placide. "Modélisation des systèmes éoliens verticaux intégrés aux bâtiments : modélisation du couple production / Bâtiment." Thesis, La Réunion, 2012. http://www.theses.fr/2012LARE0005/document.

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La technique d'intégration des systèmes éoliens verticaux (VAWT) au service des logements individuels, collectifs et tertiaires est une approche intéressante pour les acteurs de la maitrise d'énergie pour promouvoir une utilisation rationnelle de l'énergie. Le choix de l'implantation d'une éolienne en milieu urbain est déterminé par la hauteur des bâtiments, la vitesse du vent et l'intensité de turbulence du site. Les conditions de vents sévères à faible altitude sont favorables à une implantation de VAWT. Dans certaines villes, la hauteur moyenne des bâtiments est relativement faible et ceci
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Möllerström, Erik. "Noise, eigenfrequencies and turbulence behavior of a 200 kW H-rotor vertical axis wind turbine." Doctoral thesis, Uppsala universitet, Elektricitetslära, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-316385.

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Vertical-axis wind turbines (VAWTs) have with time been outrivaled by the today more common and economically feasible horizontal-axis wind turbines (HAWTs). However, VAWTs have several advantages which still make them interesting, for example, the VAWTs can have the drive train at ground level and it has been argued that they have lower noise emission. Other proposed advantages are suitability for both up-scaling and floating offshore platforms. The work within this thesis is made in collaboration between Halmstad University and Uppsala University. A 200-kW semi-guy-wired VAWT H-rotor, owned b
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Christoffer, Fjellstedt. "Simulations of vertical axis wind turbines with PMSG and diode rectification to a mutual DC-bus." Thesis, Uppsala universitet, Institutionen för teknikvetenskaper, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-323735.

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Transient simulations were performed with MATLAB Simulink on a mutual wind park topology, where three vertical axis wind turbines equipped with permanent magnet synchronous generators were connected to a mutual DC-bus through passive diode rectification. The aim with the work was to show the effects of two different kinds of loads on the system in respect to generator torque, rotor speed, produced power by the generators and the power on the DC-bus. The loads were a variable voltage source and a resistance with the value 2.0 Ω. It was shown that the transient behavior of the system in respect
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Rastegar, Damoon. "Modification of Aeroelastic Model for Vertical Axes Wind Turbines." Thesis, Blekinge Tekniska Högskola, Sektionen för ingenjörsvetenskap, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-3388.

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In wind turbines, flow pressure variations on the air-structure interface cause aerodynamic forces. Consequently the structure deforms and starts to move. The interaction between aerodynamic forces and structural deformations mainly concerns aeroelasticity. Since these two are coupled, they have to be considered simultaneously in cases which the deformations are not negligible in comparison to the other geometric dimensions. The purpose of this work is to improve the simulation model of a vertical axis wind turbine by modifying the structural model from undamped Euler-Bernoulli beam theory wit
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Kazlova, Ala, and Bettina Ullmann. "When Wind Goes Vertical: : Can a start-up company make use of its born global potential to revolutionize the wind turbine industry?" Thesis, Linnéuniversitetet, Ekonomihögskolan, ELNU, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-6605.

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The 21st century would be a nightmare for Don Quijote: thousands of windmills are installed all over the globe and the number will increase tremendously over the next years. If climate change was an issue in the early 17th century, Don Quijote might have specialized in fighting nuclear or fossil fuel power plants. The change in power production is clearly pronounced, and it inspires the market to respond immediately. Numerous wind turbine manufacturers emerge, developing one technological innovation after another. The trend clearly goes in one direction: horizontal axis wind turbines in all po
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Andersson, Carl, and Mikael Sahlin. "Vid vägskälet : vart du kommer från påverkar vart du bör gå." Thesis, Högskolan i Borås, Institutionen Handels- och IT-högskolan, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:hb:diva-19411.

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SYSteam DTS AB är ett IT-konsultföretag etablerat i Borås. De har cirka 35 anställda,cirka 300 kunder och erbjuder verksamhetsanpassade helhetslösningar inom IT-området.Varje års affärsplan behöver som oftast skrivas ihop under en kort tid vilket medför attunderlaget kanske inte innehåller exakta och uppdaterade uppgifter. Tidsfaktorn påverkaralltså affärsplanens kvalitet.Genom att definiera den typiska kunden till DTS inom modebranschen fastställs likhetermellan kunderna. Därigenom går det att identifiera vilket typ av företag DTS inriktar sigmot och hur mycket pengar det finns kvar att tjäna
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Aboujaoude, Hady. "Contribution à l’amélioration des performances aérodynamiques d'une éolienne Savonius à l'aide d'un déflecteur axisymétrique." Electronic Thesis or Diss., Reims, 2024. http://www.theses.fr/2024REIMS018.

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Face aux enjeux environnementaux actuels et à la croissance constante de la demande énergétique, le développement de sources d'énergie renouvelable s'impose comme une priorité. Parmi ces sources, l'énergie éolienne occupe une place de choix. Cependant, l'implantation d'éoliennes en milieu urbain pose des défis spécifiques liés à la nature intermittente et turbulente du vent en ville.C'est dans ce contexte que cette thèse se penche sur l'optimisation des éoliennes Savonius, un type d'éolienne à axe vertical particulièrement adapté aux environnements urbains en raison de sa robustesse et de sa c
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dal, monte andrea. "Development of an open source environment for the aero-structural optimization of wind turbines." Doctoral thesis, Università degli studi di Padova, 2017. http://hdl.handle.net/11577/3425842.

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An advanced open source optimization environment, for the design of Horizontal and Vertical Axis Wind Turbines, is hereby presented: several geometric parameters can be used as design variables while the proposed objective functions allow to run a multi-disciplinary study considering structural and aerodynamic analysis and the impact of the design on the total cost. In order to improve the performances of the considered wind turbine model, the airfoils can be parametrized in serveral ways and both in-house functions and open source tools are integrated in the optimization environment, based o
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Hamidi-Nia, Gilda. "Vart tog aktivisterna vägen?" Thesis, Stockholms universitet, Institutionen för mediestudier, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-130936.

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Fem år har gått sedan hela världens strålkastare riktades mot länder i Mellanöstern och Nordafrika. Storögda och förväntansfulla var världspubliken när de såg hur tiotusentals människor samlades runt flera gator och torg och krävde att få sina röster hörda och att de styrande diktatorerna skulle avgå. Det skanderades då, år 2011, om demokrati och frigörelse från decennielånga förtryck. Men i dagens Egypten vittnar människor om att det under de här fem åren regredierat till ett lika illa, om inte värre, samhälle än innan. Oppositionella röster motverkas och tystas genom att sprida skräck hos de
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Krüger, Pontus. "VART TAR PENGARNA VÄGEN?" Thesis, Malmö högskola, Fakulteten för hälsa och samhälle (HS), 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:mau:diva-26384.

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Penningtvätt i Sverige är sedan tidigare föga utforskat. I denna studie är syftet att undersöka penningtvätt i Sverige vad det gäller brottsstrukturen, gärningspersoner samt statistiska samband för dessa. Studien är ett uppdrag utfärdat av Länskriminalpolisen i Skåne. Materialet har bestått av straffrättsliga domslut hämtade ifrån Blendow Lexnovas rättsfallsdatabas. Utifrån domsluten kodades variabler vilka matades in i SPSS där statistiska analyser genomfördes. Resultaten visar bland annat att mest pengar återinvesteras i företag, gärningspersonerna är typiskt män i 40-årsåldern med brottslig
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Sandqvist, Sofia. ""Vad har ni valt?"." Thesis, Malmö högskola, Fakulteten för lärande och samhälle (LS), 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:mau:diva-27213.

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Studiens syfte är att analysera valtavlans funktion samt position ur ett delaktighets- och maktperspektiv. För att precisera syftet har jag utgått från frågeställningarna; Vilken funktion har valtavlan ur ett delaktighetsperspektiv? och Hur kommer makt till uttryck genom valtavlan? Utifrån begreppen makt och delaktighet med användbara analytiska verktyg jag synliggjort hur valtavlan skapar makt individer emellan och hur delaktigheten kommer till uttryck. Metoden som används är kvalitativ och empirin som används i analysen har samlats in genom observationer på en förskola i Skåne.I studien kan
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Göransson, Robert, Jonas Ljungfeldt, and Sebastian Ödquist. "Agil metodanpassning, vart finns riskerna? En fallstudie om vart risker uppstår vid agil metodanpassning?" Thesis, Örebro universitet, Handelshögskolan vid Örebro Universitet, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:oru:diva-65072.

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Åkerström, Jenny, and Lena Gröndahl. "Repatriering : Vart tar kunskapen vägen?" Thesis, Uppsala University, Department of Business Studies, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-7869.

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<p>Globaliseringen innebär möjligheter för företag att verka på en större marknad, men detta innebär också att organisationen blir mer utspridd och svårkontrollerad. Ett ökat fokus på kunskap som resurs för att skapa konkurrensfördelar samt att använda expatriering som ett verktyg för hantering av den utspridda organisationen har lett fram till valet av syfte med denna uppsats. Vi vill utifrån vår modell över hur repatrioters kunskap kan överföras och bidra till organisationens utveckling, beskriva och analysera hur företag idag tar tillvara på repatrioters kunskap. Vi har valt att göra vår un
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Törnert, Roger. "Vart är skolan på väg." Thesis, Linköpings universitet, Institutionen för beteendevetenskap och lärande, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-145663.

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Utgångspunkten för min uppsats är följande frågeställningar: Står utbildningen inför en total förändring ”ett paradigmskifte” vad gäller inriktningen på gymnasieskolans innehåll och verksamhet? Hur har i så fall detta paradigmskifte vuxit fram? Hur hanterar skolan de nya risker som uppstår i anslutning till att samhället gått in i en ny modernitet? Hur förhåller sig gymnasieskolan till det postmoderna nya individualiserade samhället? Förutom styrdokument har min undersökning utgått från litteratur som analyserar samhället utifrån postmodernistiska teorier. Resultatet av undersökningen visar at
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Siegfried, Ellinor, Andreas Svenberg, and Gabriella Tjernbäck. "Motivationens pussel : Vad passar vart?" Thesis, Örebro universitet, Restaurang- och hotellhögskolan, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:oru:diva-33334.

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Motivation kräver engagemang, mål och att ha kunskap att agera. En anställd behöver alla tre delarna för att bli motiverad. I hotell- och restaurangbranschen är det viktigt med motiverade anställda, då de är organisationens ansikte utåt. Syftet med studien var att undersöka hur motivation fungerar och bör användas inom hotell- och restaurangbranschen. Fem vetenskapliga artiklar i ämnet valdes ut, studerades och diskuterades med avsikt att besvara syftet. Det visade på hur betydande det är för en organisations framgång att motivera sin personal för att de skall vilja stanna kvar i branschen. Sl
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Westin, Philip. "Nätra – Vart tog järnåldern vägen?" Thesis, Umeå universitet, Institutionen för idé- och samhällsstudier, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-187660.

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Nätra was one of the larger parishes in Västernorrland during the Middle Ages and have a ruin of an medieval church next to Nätraån in height with Bjästa, which during medieval times served as a gathering place for the surrounding villages. If you look at registered settlements, there are no remains that prove that Nätra have had permanent iron age settlements. Has Nätra been uninhabited before the medieval church was built? Where did the Iron Age go? The work intends to investigate which indicators there is for Nätra to have been inhabited during the Iron Age - with the medieval church as the
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Rashid, Sumaya. "Vart är den muslimska mångfalden?" Thesis, Södertörns högskola, Institutionen för kultur och lärande, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:sh:diva-35584.

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Akdemir, Bulduk, and Boris Filipovic. "Humankapital : Vart är utvecklingen på väg?" Thesis, Högskolan i Borås, Institutionen Handels- och IT-högskolan, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:hb:diva-19519.

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En tillbakablick på den ekonomiska utvecklingen ger en klar bild av att ekonomin har utvecklats från ett industribaserat samhälle till ett mer komplext samhälle med större krav på kompetens från anställda. Ett sådant samhälle kallas för ett kunskapsintensivt samhälle och har sedan början av 1990-talet växt allt starkare. Redovisningen har däremot halkat efter och det gör den fortfarande. Än idag finns det inga standarder eller normer som kan användas för att framhäva en av företagets viktigaste resurser, nämligen humankapital.Kunskap, skicklighet och innovativ samt de anställdas förmåga är bet
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35

Railert, Philip, Dennis Andersson, and Zakari Kristian Wikström. "Vart tog aktieägarna vägen under 2020?" Thesis, Umeå universitet, Företagsekonomi, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-184606.

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Syftet med studien var att undersöka vilka typer av bolag som har fått flest antal nya aktieägare på den svenska börsmarknaden under år 2020. Syftet vad vidare att undersöka vilka faktorer som avgjort vilka bolag som fått fler respektive färre nya aktieägare under år 2020. Studien baserar sig på ett urval av aktiebolag noterade på Nasdaq Stockholm, urvalet har hämtats från Nasdaq Stockholms som i sin tur blivit insamlad från databasen Thomas Reuters Eikon. Studien har innefattat ett flertal variabler som vi bedömt intressanta att undersöka för att se vilka egenskaper individuella investerare s
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36

Paula, Guilherme de. "Comportamento em fratura do aço VART 100." Universidade de São Paulo, 2014. http://www.teses.usp.br/teses/disponiveis/18/18158/tde-14012015-144142/.

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Ao longo dos anos o crescente interesse pelo aumento das propriedades mecânicas de resistência dos aços, bem como busca por uma tenacidade à fratura aumentada, tem levado o desenvolvimento de novos aços de ultra-alta resistência. Essa classe de aços se demonstra bastante adequada a uma série de aplicações em componentes de alta responsabilidade, como os da indústria aeronáutica. O aço VART 100 é um desenvolvimento da Villares Metals S.A. e é um aço diferenciado, por seu maior teor de níquel, cromo e molibdênio e pela introdução de cobalto em sua composição química que se apresenta como um aço
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37

Braga, José Renato Garcia. "Navegação autônoma de VANT por imagens LiDAR." Instituto Nacional de Pesquisas Espaciais (INPE), 2016. http://urlib.net/sid.inpe.br/mtc-m21c/2018/05.18.16.04.

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Nas últimas décadas, observou-se um aumento gradativo na utilização de Veículo Aéreo Não Tripulado (VANT) em diversas áreas, entre elas, monitoramento do uso da terra, operações de busca e resgate, acompanhamento de impactos ambientais, vigilância de fronteiras, entre outras. Há expectativas no aumento do emprego de VANT em aplicações civis e militares devido ao baixo custo de desenvolvimento e operacional, quando comparados com aeronaves tripuladas. A ausência de tripulação embarcada durante o emprego de VANT, principalmente em missões de grande periculosidade, também é uma vantagem, pois dim
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38

Stenius, Johanna. "Pressfotograf eller fotojournalist : vart är yrket på väg?" Thesis, Södertörn University College, School of Communication, Media and it, 2004. http://urn.kb.se/resolve?urn=urn:nbn:se:sh:diva-3865.

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<p>Studien handlar om pressfotografer i Sverige idag. Den blickar bakåt på debatten kring pressfotografer i historien, studerar pressfotografers arbete och diskuterar framtiden. Huvudfrågorna är:</p><ol><li>Vilka arbetsuppgifter ingår i en pressfotografs arbete?</li><li>Hur har yrket förändrats de senaste 25 åren?</li><li>Hur ser pressfotograferna på fotojournalistikens framtid?</li></ol><p>Metoderna har bestått av observationer, intervjuer och en enkätundersökning. Den första delen av resultaten gör nedslag på ett par bildredaktioner: Ingress Media, Nya Wermlands-Tidningen och Aftonbladet. De
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39

Gryparis, Georgios, and Robin Johansson. "Made in Växjö : Vart tar EBD-studenter vägen?" Thesis, Linnéuniversitetet, Institutionen för organisation och entreprenörskap (OE), 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-36083.

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Problembakgrund Precis som många andra EU-länder är Sverige mitt i en utveckling av tjänstesektorn och en minskning av industrisektorn. Detta ställer nya krav på människor för framtida arbetsmarknaden. Ett sätt att bemöta detta är genom utbildning och stöd till entreprenörskap. Personer som kommer från en bakgrund med företagande föräldrar startar oftare företag och i synnerhet män. I Sverige tenderar unga människor att flytta från mindre orter till större städer. Detta kan innebära att mindre studieorter går miste om humant kapital om de inte lyckas attrahera de utexaminerade studenterna till
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40

Hörnström, Andreas, and Viktor Ekman. "Vart leder högre studier i medie- och kommunikationsvetenskap?" Thesis, Umeå universitet, Institutionen för kultur- och medievetenskaper, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-158242.

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The Umea university Faculty of humanities offers programs, courses, cross-disciplinary educations and post graduate studies. The university mentions on their website that newly graduated students rapidly establish themself in the labour market. Meanwhile a survey made by statistics Sweden (Statistiska centralbyrån) shows that graduates in humanities i general and graduates in journalism and media particularly experiences the longest gap between graduation and permanent employment. The labor market of media and communications branches off in a variety of businesses and the ever so fast developm
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41

Carlsson, Henrik. "Vart är jag på väg? Återkoppling i skolan." Thesis, Malmö högskola, Fakulteten för lärande och samhälle (LS), 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:mau:diva-29487.

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Problemområde som behandlas i studien är hur lärare använder återkoppling och om de använder den på ett sådant sätt att den har en positiv effekt på elevers lärande. Men också hur lärare förstår och uppfattar återkoppling. Återkoppling ska besvara tre frågor: vart är jag på väg?, hur går det för mig? och vart är jag på väg?. Återkopplingen kan riktas till fyra nivåer: uppgift, process, självreglerande och/eller individ. Det finns andra aspekter av återkoppling som är värda att beakta som tas upp i studien varav återkopplingens timing, muntlig och skriftlig återkoppling, återkoppling i klassrum
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42

Zu, Yige. "Developing a practicable benchmark VAT." Thesis, University of Leeds, 2018. http://etheses.whiterose.ac.uk/22448/.

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This thesis develops a practicable benchmark VAT that bridges the gap between theory and practice in VAT design and provides concrete guidance for countries to evaluate, assess, and, where appropriate, reform their VATs. The potential use of the practicable benchmark in devising a reform agenda is illustrated by means of a case study based on the Chinese VAT, a tax that is at odds with the theoretical model in many respects. Experience has shown that real-world VATs most often deviate substantially from the theoretical VAT model, revealing the disconnect between the theoretical model based pri
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Gonzalez, Campos Jose Alberto. "Design and Experimentation of Darrieus Vertical Axis Wind Turbines." Case Western Reserve University School of Graduate Studies / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=case1594690510943748.

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Gobbi, Vagner João. "Comportamento em fluência e caracterização microestrutural das superligas VAT 36, VAT 32 e NIMONIC 80A." reponame:Repositório Institucional da UnB, 2013. http://repositorio.unb.br/handle/10482/15039.

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Tese (doutorado)-Universidade de Brasília, Faculdade de Tecnologia, Departamento de Engenharia Mecânica, 2013.<br>Submitted by Albânia Cézar de Melo (albania@bce.unb.br) on 2013-11-19T12:56:33Z No. of bitstreams: 1 2013_VagnerJoaoGobbi.pdf: 96126826 bytes, checksum: dc2ee55d3661eaba1d0ae1bf74964a19 (MD5)<br>Approved for entry into archive by Patrícia Nunes da Silva(patricia@bce.unb.br) on 2014-01-28T11:28:15Z (GMT) No. of bitstreams: 1 2013_VagnerJoaoGobbi.pdf: 96126826 bytes, checksum: dc2ee55d3661eaba1d0ae1bf74964a19 (MD5)<br>Made available in DSpace on 2014-01-28T11:28:15Z (GMT). No. of bit
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Zheng, Junping <1987&gt. "The Right of Deduction within the European VAT: A Perspective for the VAT Reform in China." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2016. http://amsdottorato.unibo.it/7307/1/zheng_junping_tesi.pdf.

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Value added tax (VAT), with its specific and unique feature as a neutral taxation, has spread rapidly around the world since its first adoption in Europe. China has also chosen to adopt VAT in an attempt to promote its economic development. In 2012, China started a new round of reform of VAT to extend its scope to industries which previously were liable to business tax. One of the most difficult problems is the rebuilding of the VAT deduction system therein. Although Europe faces its own problems and difficulties in the process of perfection and coordination of VAT, as the cradle of VAT it cou
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46

Zheng, Junping <1987&gt. "The Right of Deduction within the European VAT: A Perspective for the VAT Reform in China." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2016. http://amsdottorato.unibo.it/7307/.

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Value added tax (VAT), with its specific and unique feature as a neutral taxation, has spread rapidly around the world since its first adoption in Europe. China has also chosen to adopt VAT in an attempt to promote its economic development. In 2012, China started a new round of reform of VAT to extend its scope to industries which previously were liable to business tax. One of the most difficult problems is the rebuilding of the VAT deduction system therein. Although Europe faces its own problems and difficulties in the process of perfection and coordination of VAT, as the cradle of VAT it cou
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47

Gontijo, Campos Andre. "Quantum Control over Vast Time Scales and Length Scales." Thesis, Princeton University, 2017. http://pqdtopen.proquest.com/#viewpdf?dispub=10619678.

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<p> Quantum control theory (QCT) is concerned with the active manipulation of phys- ical and chemical processes on the atomic and molecular scale. For a specified con- trol objective, and with restrictions imposed by many possible constraints, the time- dependent field required to manipulate the system in a desired way can be designed using quantum control theory. This dissertation proposes several novel applications of QCT to actively manipulate the dynamics of both quantum and classical systems with and without interactions with an external environment, in both relativistic and non-relativis
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48

Ragab, Amr. "Three essays on the incomes of the vast majority." Thesis, The New School, 2014. http://pqdtopen.proquest.com/#viewpdf?dispub=3632551.

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<p> This dissertation is mainly concerned with the distribution of between individuals in the economy. </p><p> The first chapter (Chapter 1) examines the various problems with Gross Domestic Product per capita (GDPpc) as a measure of economic welfare. The chapter proposes the Vast Majority Income (VMI) as a new measure of economic welfare that combines both national income and income distribution in a single, intuitive measure. The VMI measures the average income per capita of the vast majority of the population, defined as the first 80 percent of the population within the income distributio
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49

Garza, Simon, and Lundrim Shaqiri. "Korrosionsstudie om nickel-krom-molybden legeringar i våt skrubber." Thesis, Tekniska Högskolan, Högskolan i Jönköping, JTH, Maskinteknik, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-31255.

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Arbetet som utförts är en material studie som inriktar sig på nickel-krom-molybdenbaserade legeringar som används i dagens våt skrubber. Eftersom kraven på mängden utsläpp av svaveldioxid är en viktig miljöfråga, skapar detta ett behov för användandet av en våt skrubber. Den här produkten befinner sig i anläggningar där förbränningsmotorer finns och förekommer i princip i alla större fartyg. Rökgasen som motorerna släpper ifrån sig är skadlig för miljön och därför absorberas flödet in till en våt skrubber där en förbränning sker. Rökgasen separeras med hjälp
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50

Coraucci, André de Oliveira. "Projeto estrutural da asa de VANT em material compósito." Instituto Tecnológico de Aeronáutica, 2011. http://www.bd.bibl.ita.br/tde_busca/arquivo.php?codArquivo=2924.

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Este trabalho apresenta uma solução de projeto estrutural em material compósito para a asa de 4,044m de envergadura do Veículo Aéreo Não-Tripulado (VANT) em desenvolvimento pelo Instituto Tecnológico da Aeronáutica (ITA). Está proposta uma configuração estrutural nervurada constituída por um caixão estrutural formado pelos revestimentos do extradorso e intradorso e por duas longarinas. A configuração sugerida foi validada por meio de análises computacionais lineares em elementos finitos feitas para quatro casos de laminados distintos. Um método para cálculos aproximados das cargas de manobra
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