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2505 Uppsatser om Open channel flow - Sida 12 av 167

Kommunikationsverksamhet i ett föränderligt samhälle : En studie om hur Gällivare kommun bör kommunicera med sin befolkning under samhällsomvandlingen

The purpose of this study is to analyze which communication strategies andinformation- and communication channels that Gällivare municipality should useunder the urban transformation to communicate with the citizens. The studyconcentrates on the age-groups 16 ? 24, 25 ? 44, 45 ? 64 and people that are 65 yearsand older. This selection has been made as a segmentation of the citizens and is oneof the essay questions which refers to study the channels that each age-groups prefer.The study is a quantitative one and is based on a questionnaire survey directed to thecitizens and it?s 85 people who participated.

TV4 - kan kommersiellt och demokrati gå hand i hand? : - En studie om extern påverkan i en tv-kanal och hur kommersiella och demokratiska intressen förhåller sig till varandra 

Introduction: As the media landscape has changed so has fierce competition in the market, giving an effect of stronger commercialization of the media. Societal problems in our society are caused by increased commercialization and market orientation. Media has gone from trusted social institutions to focus on their own economic interests, where owners are expected revenue. The content of the media is characterized more and more by entertainment, because it attracts a larger audience. On one side media is expected to contribute to democracy in society and on the other they are expected to contribute profits to their owners, which creates a conflict in today?s media society.

Utvärdering av öppna dikens status och funktion : en förstudie i Västmanlands län

Evaluations of open Ditch status and function, with an assessment of suitability of a conversion to a two stage ditch as a low maintenance alternative. To illustrate Swedish drainage problems this work focused on two agricultural drainage associations assessed in detail with a new method called MADRAS (Minnesota Agricultural Ditch Reach Assessment for Stability). With the assessment of the MADRAS method estimates were made to conclude the ditches operating problems. This was made through measurements of sediment depths, mass bank failures etc. in order to quantify ditch problems and propose practical actions for improved ditch stability and water quality. The MADRAS surveys were conducted in two main ditches that drains 2900 hectares of land on the northern shores of Mälaren. In the study measurements of the ditch cross-sections were also conducted to compare actual profiles with the original map profiles. The evaluation showed that parts of the studied ditch sections were operatively poor; main reason was mass bank failure, undercut channel banks, sediment aggregations and narrowed ditches. The profile survey shows that a majority of the profiles 80 % has sediment accumulations there remains only 64 % of the original profile from the map.

En tand för en tand och en våtmark för en våtmark - ett återskapande värt pengarna? : En undersökning av nyttan och kostnaderna av att restaurera våtmark med hjälp av Contingent Valuation Method.

The goal of this study is to examine what five teacher?s impression of the teacher?s role is in their previous years. How important the ?joy at work? is in relation with the educational progress? And what aspects that contributes to the? joy at work? and what obstacles that stops them. The essay will also go through the concepts of a teacher role, with connection to the theoretical perspectives of Csikszentmihalyi?s Flow and Antonovsky?s Salutogenesis (KASAM).The method I used was interviewing five teachers and I used Larsen?s chapter of ?content analysis? as a basis, I also used Flow and KASAM as theoretical references in my analysis.

Är Lerbodaälven verkligen en problemälv? : undersökning av fosforhalter

Lerbodaälven is a river in the municipality of Kil which, due to high phosphorus content is not meeting the requirements for good ecological status according to the Water Framework Directive. The purpose of this report is to investigate the causes for the high content of phosphorus that has been measured in Lerbodaälven between 1995-2010. Four questions will be answered in this report. 1. Does the sewage treatment work affect the phosphorus level in Lerbodaälven? The result from the time series analysis shows that the sewage treatment works have a small impact on the phosphorus level in Lerbodaälven.

En flödesutjämnande driftstrategi för Uppsalas fjärrvärmesystem : En ändrad styrning av framtemperaturen

This thesis examines a possible control strategy to minimize flow fluctuations in Uppsala?s district heating system. High variations in flow rate may lead to complications caused by hydraulic constraints in the district heating system. These complications, such as inadequate pressure and temperature levels, increase the risk of heat delivery failures. It is therefore important to avoid such situations both for the producer and for the customers.Typically, the forward temperature is controlled by using a rough correlation with respect to the outdoor temperature.

Effektivisering av produktionsgrupp : Improving the efficiency of a production group

The report is about efficiency of a current production group where there is no clear production flow and there are some buffers between the operations. The efficiency is done with the help of a tool that is calledWork process of flow production which is used by Atlas Copco CTO. The most obviously results are that the lead time drops from 25 hours to 425 minutes and that the balancing loss decreases from 85 % to 8 %. The report focus on decreasing transports, decreasing buffers, more reliability in lead time and quality. And a more stimulating labour content for the workers is another result..

Underbart är kort?: En utvärdering av reklam- och upplevelseeffektivitet vid reducerad reklamtäthet i TV

The high and seemingly increasing degree of consumer avoidance and disliking of television advertising breaks should raise many questions for commercially financed television networks as it can be argued that benefits sought by both viewers [seeking a fulfilling viewing experience] and advertisers [seeking advertising effectiveness] are eroded by this effect. This thesis studies effects on advertising effectiveness [RecallBRAND; AttitudeBRAND; AttitudeAD] as well as on the viewing experience [SatisfactionPROGRAM/CHANNEL; Attitude PROGRAM/CHANNEL; IntentionPROGRAM/CHANNEL] given a reduced degree of advertising clutter. By conducting an experiment two breaks are compared, one having the standard primetime nonprogram time units (5 min and 30 sec *3?16minutes/hour) and the other the standard nonprogram content cut in half (2.45 min *3 ?8min /hour).Results show that the reduced breaks award advertisers with higher commercial effectiveness. Measures of RecallBRAND demonstrates no differences between the standard and the reduced break, implying a significantly increased likelihood to be recalled and an equivalently lowered risk to be forgotten in the reduced break.

När rummen råder : En studie om skolan som disciplinerande rum

This study titled When the spaces dominate A study of the school as disciplinary rooms is a study where the emphasis is on quality and where the results are based on observations. The purpose of the research was to analyse rooms and other artefacts in the school as seen from Foucault?s analysis of power. He emphasised that power is expressed in human relationships. To understand how that power is used one can study the techniques adopted and resistance offered.

Resan är målet: En kvantitativ studie om kongruenta erbjudandens påverkan på köpintentionen

The technological development and increasing popularity for integrated multichannel solutions constitutes both severe opportunities and challenges for todays' and tomorrows' retailers. On the account of consumers leaving traces when using digital channels and the technological development enabling retailers to use this information to create relevant offers, goal-congruity is relevant to apply in the multichannel shopping context. Based upon previous research on goal congruity and channel integration, our main purpose in this study is to increase the understanding for how congruity in an offer increases the intention to redeem the offer. Several studies focus on and contrast the product characteristics hedonic and utilitarian. However, it has been stated that it is crucial that research also examines the difference in target audience, buying situation and as examined in this study: buying decision process.

En kartläggning av webbaserade open-source GIS-lösningar

Intresset för kartbaserad information på Internet ökar i rask takt. Samtidigt växer önskan av att sprida geografiskt material i form av interaktiva webbkartor utan att vara hänvisad till dyra, professionella GIS (Geografiska Informationssystem) programvaror. Idag finns det en rad open- source lösningar på webbaserade GIS som utan kostnad får utnyttjas, spridas och byggas ut efter egna önskemål. I detta examensarbete undersöks ett 20-tal open-source webbGIS-produkter enligt en allmängiltig mall som vi har tagit fram för att kunna jämföra olika lösningar enligt klart specificerade kriterier. Dessa omfattar bl.a.

Vetenskaplig kommunikation inom kemi och ekonomi: ett polskt perspektiv.

This study examines the scholarly communication activities in two scientific fields, chemistry and economics, in a Polish context. The dissertation aims at investigating what characterises the publishing choices of researchers and what supplementary forms for the dissemination of research output are used by scholars. In addition, the paper is looking into what are the views and awareness of open access and institutional repositories within this scientific community. This thesis gives the results of semi-structured interviews and an online survey at two academic faculties at a Polish technical university. As its theoretical framework, the study uses Whitley?s theory of the intellectual and social organisation of academic fields and Latour and Woolgar?s study regarding various motivations for publishing.

Småskalig vattenkraft vid Olofsfors bruksmuseum : Med faunapassage

In Sweden there are 1894 small-scale hydropower plants in operation, which together generate 4.3 TWh of electricity per year according to Swedish hydropower compound (SVKF, 2011). This corresponds to the annual consumption of about 860,000 Swedish households (based on an annual consumption of 5000 kWh). In the mid-1950s there were around 4000 small-scale hydropower plants in operation in Sweden before cheap fossil fuels and uranium competed with them, in the current situation only 1,894 of these are in use. If slumbering small hydropower plants once again would be taken into use and some new ones are built, we would be able to extract about 7 TWh of renewable electricity from these annually in Sweden, representing about 1.4 million households.The thesis intends to calculate and construct a hydroelectric power plant at the existing dam in Olofsfors and give suggestions on how the power station should run during the time that fish migration is greatest in Leduån.The turbine and generator to the station in Leduån at Olofsfors is designed by the height of the fall and the water flow through the dam. The turbine selected for the station is a CK-1000RM turbine with a 4-pole 250 kW generator from Cargo & power turbine Sweden AB, which is expected to deliver 1.2 GWh per year.

Synen på Säkerhet och Immigration : Finns det ett samband?

The aim of this study is to explore howEuropean changes in the view on securityrelates to the view on immigration and viceversa. The answer to that question is basedupon collected data from three separatetime periods; the 1950s, 1970s and 1990s.These time periods are seen as importanthistoric decades when political changes,assumed to have affected the views onsecurity and immigration, have occurred.According to certain criteria each timeperiod has been labelled in terms ofnarrowed/widened view on security as wellas restrictive/open view on immigration.The hypothesis of the study is that, whencompared, a constant pattern can be seenbetween the historical labels of eachphenomenon, where a narrow view onsecurity goes hand in hand with an openview on immigration and similarly a widesecurity view relates to a restrictive viewon immigration.The conclusion of the study gives supportto the hypothesis. During all three periodsstudied a restrictive view on immigrationrelates to a wider view on security while anopen view on immigration relates to anarrower view on security. Thisrelationship goes both ways..

Syntes och egenskapskarakterisering av volframoxid framställd med magnetronsputtring

The system tungsten-oxygen has potential of being suitable for decorative coatings since ceramic coatings are often hard and wear resistant, and since modulations in oxygen content or incorporation of small ions could give bright colours. The aim of this report was to investigate the relationship between process parameters and  the properties of the films, with the wear resistance being of special interest.Samples with tungsten to oxygen ratios in the range of 100:0 to 25:75 at% were made using reactive sputter deposition, either with constant gas flow, or gas flow controlled by optical emission of the plasma. The hysteresis of the system, which means that a certain gas flow will cause different pressure and/or target voltage depending on in what way the flow is reached, makes it interesting to control the process where the system makes the steep change from metallic tungsten to ceramic tungsten oxide. This is difficult and thus requires precise control equipment.The samples were analysed using X-ray diffraction, X-ray photoelectron spectroscopy and an empirical wear test suitable for small components like cell phone cover for example, in order to characterize the structure, composition and wear resistance of the coatings. The results could be divided into three groups: (I) tungsten-like, with very low oxygen content; (II) mixed phase and (III) tungsten oxide like, with oxygen content close to 75 at%.

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