Sök:

Sökresultat:

2182 Uppsatser om Hydropower reservoirs; dam safety; erosion protection; waves; simulation; MIKE 21 Spectral Wave - Sida 48 av 146

Metodik för utmattningsberäkning av svets i vibrationsmiljö

In this work, a method was developed and evaluated for calculating the life of welds under the influence of fatigue loads from a vibration environment. Typically, a shaker table is used for testing a component against vibration loads. The shaker table creates a vibration environment that is defined in the frequency domain by a power spectrum.Similarly, a virtual vibration table can be used to calculate the same type of load environment, which can then be used to calculate the expected lifetime. The benefit of this method is that it can be used in design, as well as in simulation of tests before physical verification tests are carried out.Today there are methods for calculating fatigue life of non-welded base material, but since many components contain welded joints, there is a need to apply this method to those types as well. To achieve this, the thesis combines two different areas, which together provide a method for fatigue assessment of welds using a virtual shaker table.The methodology is carried out by modeling the component, and its welded joints, in a finite element program.

Värdefull eller värdelös? - Kulturhistorisk värdering och färjestationen i Helsingborg

This essay in historical archaeology deals with cultural-historical values of buildings and inthis case the old train- and ferrystation in Helsingborg. The building has from the day of itsopening in 1898 been exposed to threats of demolition since its original purpose was as atemporary building with intension of being replaced within a couple of years. After havingseen two World Wars, eventhough Sweden never participated, and the ferrytraffic with its upsand downs the station was an important part of Helsingborg. All the ferrytraffic over the straitto Denmark was handeled by the old train- and ferrystation untill 1955, when a competativeferrycompany was built close to the old station. After a hundred years of service the oldstation was closed down when a new station was built i Helsingborg in 1991 with theintension of gathering all travelers in one building.

Kvaliteten hos charkprodukter efter borttagandet av namnskydd, samt införandet av EU:s köttdefinition

Until the 1st of January 2003 there were thirteen processed meat products provided with name protection in Sweden. These products had to contain a certain amount of meat and/or a certain amount of fat to be allowed to carry a recognized name. Among these thirteen products, one could find, for example, meat balls (köttbullar), liver pâté (leverpastej), and Falun sausage (Falukorv). While imports of these products started to increase, the system with name protection lost its ability to guarantee a certain quality for all products sold in Sweden and the legislation was removed on December 31st 2002. At the same time, a common definition of meat was adopted in the European Union.

Trygghet kring hållplatser. Ett framtaget verktyg vid trygghetsanalysering i samband med hållplatser och dess närmaste omgivning

Att människor idag avstår från att delta i sociala aktiviteter i samhället på grund av att de känner sig otrygga i kollektivtrafiken, och då särskilt på hållplatser och vägarna till och från, går inte ihop med Göteborgsregionens mål om en ökad användning av kollektivtrafiken. För att få fler att välja kollektivtrafiken som färdmedel måste tryggheten kring hållplatserna öka, vilket skulle innebära fördelar för både hälsa, miljö och välfärd. Det är speciellt kvinnor som anger att de, särskilt kvällstid, avstår från vissa aktiviteter för att de inte känner sig trygga på hållplatsen eller väljer att gå långa omvägar hem för att de känner sig otrygga. Olika fysiska åtgärder, i det offentliga rummet, påverkar den upplevda tryggheten hos människor och med enkla medel tryggheten öka avsevärt på en plats.Syftet med detta arbete är att belysa trygghetsfrågor i samband med hållplatser i Göteborg för att bidra till den debatt som finns angående trygghet i kollektivtrafiken.För att göra detta har en analysmetod tagits fram och ett verktyg har utformats för att undersöka tryggheten på en hållplats och dess närmaste omgivning. Detta kommer att underlätta prioriteringar och utveckling av platsen ur en trygghetssynpunkt.En omfattande litteraturstudie har genomförts för att få en uppfattning av begreppet trygghet och vad det innebär.

Analys av eroderbar dammdel vid Vittjärvs dammanläggning

Dammar har byggts världen över i flera tusen år men det är först nu under de senaste femtio åren som tekniken och kunskapen gjort att allt större dammar kan konstrueras. Dessa dammar är relativt unga och har dimensionerats efter det högsta uppmätta flödet i älven multiplicerat med en säkerhetsfaktor. 1983 bildades Flödeskommittén vars uppgift var att ta fram nya riktlinjer för dimensionerande flöden. 1990 var Flödeskommitténs rapport klar och den visar att nästan alla svenska dammar är underdimensionerade med avseende på extremflöde. Under perioden 2002-2007 kommer Sveriges största dammägare, Vattenfall, att investera 1.2 miljarder i dammsäkerhetshöjande åtgärder hos sina anläggningar.

Omvända skattskyldigheten i byggsektorn Gränsdragningen mellan vara och tjänst?

In tune with the cross-border trade the infringement of intellectual property rights has become a growing problem in Europe and the rest of the world. In June 2008 negotiations about a new international agreement was initiated between Europe, its member states and ten other countries, which will restrict infringements of intellectual property rights. The agreement is called ACTA, which stands for Anti-Counterfeiting Trade Agreement. On January 26, 2012 the European Union (EU) and twenty-two of its twenty-seven member states signed a letter of intent to the agreement and the EU?s internal processes of the agreement began.

En designad fluidsimulation

In this report I will describe how an art-directed fluid effect for motion picture can be achieved. This effect will be an explosion with a visual style that is congruent with Pixar's movie Up. To begin with I will analyze the visual components that are used in Up and control the fluid simulation to get the desired visual style. I will briefly explain the background of my thesis, why it is interesting to create designed effects and why it is hard to design fluid effects. In the method I will explain my work process and some of the challenges that arises.

Yttrandefrihet i sociala medier

AbstractSweden has had a long tradition of freedom of the press and freedom of speech. Today the judicial area is regulated by the constitution of the press and the constitution of speech. The purpose of the two constitutions is to secure the right for every Swedish citizen to express their thoughts, opinions and feelings.The constitutions are designed to regulate the techniques with which the information is distributed and not to regulate the information in itself. This fact has caused a debate to arise on the subject whether the constitutions are still suitable to regulate the judicial area when the technical development causes the constitutions to get out of date and in need of constant updating. As a rule the usage of social media is not regulated by the constitution of speech the information distributed through these webpages can be included by the protection given by the constitution but very few of these webpages fulfill the criteria?s demanded by the constitution.The purpose of this essay is to ask the question whether the constitution of speech should be reformed to better regulate the technical development in the future.

Yrkeskunnandets styrka och skörhet : En essä om erfarenheter inom vården

In this thesis the core of the nursing professional skill will be portrayed through the opportunities of the essay writing. Thus the tacit knowledge, which is at the verge of erosion in a zeitgeist where medical care shall be cost-efficient and where development is mainly based on scientific research, will be articulated. Scientific articulation of knowledge has gained increasing importance on the expense of the practical knowledge. Healthcare professional skill requires a refind ability of judgment, which absorbs its nourishment from both scientific knowledge and the proven proficiency expertise.Professional skill expresses itselfs through action, especially through the acting in unexpected incident. Experience is developed into knowledge through reflection.

En modellstudie av ett dammsystem hos SSAB Tunnplåt AB

Föreliggande rapport har tillkommit på uppdrag av SSAB Tunnplåt AB, Ämnen, ett företag i stålkoncernen SSAB. Företaget utvinner järn ur pellets och vidareförädlar det till stål. Avdelningen för Yttre miljö vid företagets anläggning i Luleå har tidigare genomfört två studier för att bestämma uppehållstiden i Laxvikensystemet vilket utgörs av tre sedimenteringsbassänger för industrivatten. Båda försöken, som genomfördes med spårämnet rhodamin, visade på kortare uppehållstider än vad som tidigare antagits. Målet med denna studie var att analysera flödesmönstret i bassängerna och att finna effektiva åtgärder för förlängd uppehållstid och ökad avskiljning.

H2 För racing

AbstractMotor sports have been around as long as motor vehicles have been. Sports are often seen as costly polluter but in the same time the motor sports have encourages a large part of development, both for vehicles and other industries. Inventions like rear mirror and ABS brakes come from motor sports. One way to once again drive development forward while making motor sports carbon-neutral is to run the race cars on hydrogen. In this thesis, the goal is to convert a spark ignition engine for hydrogen operation.

Konceptuell design och utveckling av hybridfordon

This report covers the conceptual design of a new one person hybrid vehicle that is to be fast and convenient to drive on the roads. The vehicle is most of all supposed to be used as a commute vehicle but can also be used at other occasions as well.During the work with this project the group has focused on three larger areas, the outer design (body), wheel chassis and an ergonomically designed interior. The group was not able to just create these parts in 3D to get a trustworthy vehicle, hence number of other components and details were also created to get a better entirety.The outer design starts with idea generation and sketches and ends with a 3D model which is rendered to show how the final product is going to look. The design of the body has been going on during the entire work process due to new ideas and improvements that seemed interesting and had to be changed.The wheel chassis also started with idea generation, research and sketches. It ended up with a simulated 3D model which later on was mounted on the vehicle body to show how the vehicle is going to perform during usage.

Förstudie för en vindkraftpark på Malmölandet i Norrköping : En undersökning av förutsättningarna för en vindkraftpark på ett sen tidigare planerat område

This is a feasibility study that examines various aspects of building a wind farm on Malmön in Norrköping. The feasibility study deals with interests of conflict, park design, electrical connections, production calculation, financial calculations and operating- and timetable.The report is divided into two distinct parts. First a theoretical part, which deals with conflicting interests, park design and electrical connections. Second a part with simulations dealing with production calculations, and financial calculations.Opposing interests are mapped so that problem areas can be found, and help put focus on the right places at a future environmental impact assessment (EIA). There are a number of areas where planners have to assess on an EIA, this thesis point on the most important areas.

Val av område och områdesskydd för Natura 2000 med skogshabitat : En jämförande studie av fyra län i Sverige

The Natura 2000 Network is one of the European Unions many tools concerning nature conservation, and is without comparison the premier contribution when it comes to halting the loss of biodiversity. This essay is a case study on how the regional work with the Natura 2000-network has been carried out in four different counties. These counties are Södermanland, Västernorrland, Jämtland and Örebro. They have been compared based on the theoretical concept of sustainable development. This essay describes how the officials in the County Administrations view the regional implementation of Natura 2000 when it comes to the selection of Natura 2000-sites with forest habitats and the creation of an additional protective measure.

"Man tar på sig sin riddarrustning...": en kvalitativ studie av socialarbetares upplevelse och hantering av rädsla i yrkesutövningen och hur det påverkar arbetet

The purpose of this article is to examine how social workers may experience fear in their profession, how they and their organizations handle the fear and how the fear may affect their practice. To obtain the purpose, in-depth interviews were carried out with seven social workers from the southeastern part of Sweden. The experiences of fear were many and are summarized in four categories. Fear of treats and violence, fear of the responsibility in complicated situations and without optimal solution, fear of being regarded and judged as worthless and fear of being scrutinized with the risk of being stigmatized. Five strategies were identified to handle the fear: Safety strategies (e.g.

<- Föregående sida 48 Nästa sida ->