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574 Uppsatser om Load-bearing brick vault - Sida 13 av 39

De nya Moderaterna : Förnyelse eller 'samma gamla visa'

 The purpose of this thesis was to explore how the ideological self-image of the biggest Swedish governmental party, Moderaterna, has developed between 1993 and 2011. The second purpose was to compare this development on a fundamental ideological level, with development on the operative ideological level. This was to be made by qualitative analysis of the party?s ideological programs and election manifestos. Hopefully this would expose a pattern of the party?s ideological development. The findings of this thesis however, suggested that while the ideology on the fundamental level had radically changed, the ideology on the operative level has been characterized by continuity.

Optimering av glidlager och utveckling av dess konstruktion

I detta projekt har vi fördjupat oss i en glidlagerkonstruktion som befinner sig i en skruvpress. Skruvpressen kompakterar en okänd massa som är sekretessbelagd. Robustus har ett förslag på överdimensionering av det nuvarande glidlagret. Målet med projektet var att analysera och optimera några glidlager i förhållande till det befintliga glidlagret samt att ta hänsyn till materialval och den miljö som lagret kommer att befinner sig i. Det som analyserna och optimeringen visade var att det befintliga glidlagret hade den bästa geometrin bland alla lösningar men inte det optimala materialet.

Förändringar i markanvändning över tid och dess påverkan på vattenkvalitet

The EU Water Framework Directive has led that management follows the boundaries of natural catchments.The Swedish waters suffer from a nutrient overload that originates mainly from diffuse sources such as agriculture and the subcatchment of Hackstabäcken in Vallentuna Kommun, just north of Stockholm, has been chosen for this study because of its high nutrient load and because it has undergone obvious changes in land use through the years.In this study, the land use in 1902 is compared with the land use in 2011 in order to investigate if it has influenced the ability of the landscape to produce ecosystem services related to nutrient removal. These services will continue to be produced as long as the system is stable and resilient, but when landuse changes and manure from horses increases it will lead to disturbances that can convert a system from one regime in to a completely different one. That will result in loss, or degradation, of ecosystem services such as denitrification, phosphor sedimentation and adsorption, vegetation uptake and infiltration.The results of this study are based upon area calculations of landuse from old maps from 1902 and 2011. Through these maps it becomes clear that the forests in Hackstabäcken, has increased with 170 ha together with an urbanization of 311 ha, at the same time as wetlands and arable land has diminished and lakes has suffered from reductions. Wetlands have been reduced with 76 ha and the ones remaining are of insufficient quality from a nutrient removal perspective.Data from 1902 and 2011 regarding number of horses and bovines indicated a decrease in bovines and an increase in horses.

Tanto förskolor

SAMMANFATTNINGEtt av de valbara kandidatprojekten på KTH 2014 var att utifrån ett ganska detaljerat program utforma en stor förskola i Tantolunden i Stockholm. Åtta avdelningar, det vill säga 130 barn och 30 anställda. Dessutom en så kallad plusfunktion med avsikt att ge byggnaderna användning även när förskolan var stängd. Min ambition var att göra en pedagogisk arkitektur på barnens villkor och med ständigt prioritet på barnens bästa.Efter en serie workshops med barnen på Ragvalds förskola utkristalliserade sig tre bärande idéer. ? Förskolan ska ha torn att leka i.? Tegel är det bästa byggmaterialet.? Det ska vara enkelt att gå in och ut. Detta lovade jag dem att ha med i mitt förslag. Resultatet blev en serie byggnader, sammanlagt 8 stycken sammanbundna av lider och lektorn, över en av de befintliga stigarna i Tantolunden.  Även barn som inte går på förskolan har tillgång till de fyra lektornen individuellt utformade.

Byggnation av ett tak i Lwengo Basilla : En fältstudie med fokus på infästningar, pelare och bärläkt på en skola i Demokratiska Republiken Kongo

The Swedish Transport Administration manage nearly 4,000 railway bridges in different condition and age around the country. These bridges is in constant need of maintenance and requires continuous inspections. This thesis is designed as a damage investigation on a single-track railway bridge south of Solvarbo in Säter municipality. The railway bridge is in operation and serves over 10,000 trains a year, everything from speed trains to freight trains. The bridge is built as a beam bridge, simply supported over a road.

Fuktvandring i putsade lättbetong- och tegelfasader : En undersökning om hur fukt vandrar och beter sig mot en putsfasad av två olika material med olika porositeter.

I dagsläget finns en stor mängd byggnader i Sverige där fasaden består av puts direkt anliggande mot antingen lättbetong eller tegel. Dessa fasader kan skapa problem för brukaren p.g.a. fukttransport via putsen direkt in i konstruktionen. Problemen som kan uppstå som följd av dessa konstruktioner är inte bara estetiska utan kan även påverka inomhusmiljön. Syftet med detta arbete var att undersöka om det gick att med ny teknik visa de resultat som framkommit från erfarenheter från praktiskt arbete samt undersöka hur en renovering påverkar de fasader som består av puts direkt mot lättbetong eller tegel.

Avspecialisering som framgångskoncept för jämnare arbetsfördelning?

The application of the LSS law and how the public organization (Municipality of Hudiksvall) later had to reform their organization to fit the new demands is the foundation to this master's thesis. An internal evaluation was performed due to this reorganisation process within the social care department (LSS unit). The aim was to investigate and evaluate if the reorganization resulted in a better working environment and if the work load (distribution of work) became more evenly divided between the different unit managing directors. The primary empirical information to this master's thesis is collected from that evaluation report. The main aim of this master?s thesis is to answer if the organisational choice between specialised or de-specialised working tasks has an effect (experienced and measured) on the level of stress among the unit managing directors.

Kylapotentialen i Drefviken för Vattenfall Heat AB

Vattenfall Heat AB is a district heat provider in Drefviken, but has yet to establish any cooling systems in this area. This thesis examines the potential client base within the area today and over the coming 20 years. The feasibility of the most common cooling technologies is evaluated and results show a total potential for an installed capacity of 30 MW providing 50 GWh of cooling per year. One of the examined areas shows good prospect for heat driven absorption chillers during the summer months when the heat load is limited..

Utveckling av dynamiska farthinder

The aim of this Master of Science Thesis is to develop guidelines and improvementsuggestions of RiNOVA Traffic AB?s dynamic speed bump. The project started with athorough pre study of the design and its function to find out how passing vehiclesaffects the dynamic speed bump. The majority part of the pre study was to createnecessary mathematical models to explain the arisen forces and strains.The results of the mathematical models gave necessary information about the designregarding weaknesses and flaws. The most critical ones where those which interferedwith the design?s performance and reliability, and therefore needed to be corrected.These problems where more thorough analysed and discussed with experts before thefinal guidelines and improvement suggestions where developed.The parts of the design that had to be redesigned were the extension springs and thebearing that enables the dynamic properties.

Språkets betydelse för matematikinlärningen

Study aimed to see if the language has bearing on mathematics learning. The study used qualitative interviews of three first grade teachers and one special education teacher.The questions asked was:Do the teachers and specialist teacher, at the selected schools, think there is a connection between language difficulties and difficulties in mathematics and in case how is this connection.How does the teachers / specialist teacher make it easier for students to learn mathematics and swedish.The study was based on Vygotsky and Piaget teories. In previous research, it is primarily Malmer, Hoines, Lowing and Kilborn who´s been treated. Within the governing documents, it is mainly the compulsory school curriculum Lpo-94, and the curriculum for mathematics treated.I hope that the study has conclude that there is a connection between language and mathematics learning.I tried to emerged this through interviews with tree teachers and one special teatcher but i couldn´t. The teatchers couldn`t fint that it was the only reason to why the pupils hade difficulties in mathematics.But in the literature I found the relation between language- and mathematicdificulties..

Vårdpersonalens uppfattningar om fibromyalgi

Aim Our aim is to highlight perceptions of fibromyalgia among health care personell.MethodsA systematic literature review conducted with a deductive approach.FindingsHealth care personell felt insecure because of a lack of understanding which lead to avoiding contact with these patients. Many felt that the fibromyalgia patient was categorised and that they would have been better served with another name of their disease. There was a great distrust against the diagnosis and its aetiology. The patient was perceived as troublesome, illness-fixated and draining the personell of energy. The paradox that the patient is looking so healthy but bearing so much pain was confusing for the health care personell.Conclusions Communication and an empathic encounter was identified as important elements for patient care.

Näringsretention i återskapad våtmark på betesmark : studier av en mad vid Bornsjön

It is important to construct or recreate different types of wetlands and study their retention of nutrients, since knowledge of their effectiveness in this matter is poor. In 2003 a wetland was constructed on an old meadow on the western shore of Lake Bornsjön in central Sweden. The main purpose of the wetland was to reduce the amount of phosphorus entering the lake, which is the back-up water supply for Stockholm when the city cannot obtain water from Lake Mälaren. Large areas around Lake Bornsjön consist of agricultural land and the nutrient concentrations in the inflows to the lake are usually relatively high (approx. 1 mg/l total nitrogen and 0.05-0.1 mg/l total phosphorus).

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.

Direct-EGR tillämpat på HCCI

The Homogeneous Charge Compression Ignition (HCCI) engine is promising in terms of lowNOx, low particulates and high efficiency. Due to its homogeneous charge, where thecombustion starts almost simultaneously from a number of points in the combustion chamber,only lean mixtures are possible to burn because of the resulting rapid combustion, which is muchfaster than the combustion in an SI-engine or a diesel engine. When richer mixtures are used thecombustion will start earlier and also be more violent.To phase the combustion later and lower the combustion speed, external cooled EGR can beused. The EGR-system used in this thesis uses a divided exhaust channel where one channel andits corresponding valve are used only for transporting EGR back to the intake system.Consequently the EGR-valve is connected to the intake pressure. This system is called Direct-EGR (D-EGR).Engine tests verified that the CA50 indeed is phased later when cooled EGR is used.

Självgående fordon hos Sandvik do Brasil

At the plant of Sandvik do Brasil in São Paulo there is a need for improving the transport of inserts between the plant building and the stock building. The idea is to install a system with an Automated Guided Vehicle (AGV) to take care of this transportation. The purpose of this report is to present which demands there are on the system and to find the best solution according to the demands.To conclude this work a study was made of the plant and the AGV technology was examined. Several providers of AGV solutions were contacted to get information about prices and detailed solutions.The conclusion was that the most suitable system for this application is a small unit load vehicle using inductive wire as guiding system..

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