Sök:

Sökresultat:

771 Uppsatser om Ultrasonic range - Sida 20 av 52

Demonstratortest av gassensor baserad på tryckt organisk elektronik och jonledande papper

Researchers at Karlstad University have developed a method for making paper ion conducting. The reasearchers want to test this technique in various applications and produce products that make use of the ion-conducting paper. Hopefully this will drive the development forward and result in new applications for the ion-conducting paper.This study was to test the possibility of manufacturing a gas sensor of conducting paper along with electrodes of conductive polymers printed on the paper. By comparing the paper sensor with an electrochemical cell in which the electrodes of conductive polymer replaces electrodes of metal and ion-conductive paper replaces the liquid electrolyte in the electrochemical cell, it was hoped that it would be possible to measure the oxidation and reduction reactions that a gas could introduce at the electrodes.It was shown that it is possible to measure a potential difference in the range of 0.3 V to 0.5 V between the electrodes when exposing an electrode to 100% oxygen. The reaction that takes place is relatively slow and the reaction rate is partly due to the distance between the electrodes.Since the sensor can measure oxidation and reduction reactions it is possible that, in further development of a sensor, the sensor can be made ??into a versatile sensor with more applications than gas measurement as there are many more ways to oxidize or reduce the electrodes than by exposure to oxygen.During the study there have been discussions and meetings held with various companies in the sensor industry to be able to specify what the market demands of a sensor made ??of paper and the requirements that must be placed on the sensor for it to be interesting for the companies..

De flesta var hantverkare, butiksägare och arbetare och deras hustrur : Analys av kvinnan i läroböcker och läroplaner i historia 1970-2011

The study's aim is to implement a textbook analysis and examine how women are described in history textbooks for high school and in the curriculums Lgy 70, Lpf 94 and Gy 11. The study has a gender perspective and the study's purpose is to make a comparative study and compare textbooks with the current curriculum and compare the results with each other to see if there has been any change over time. The survey's material is three editions of Alla tiders historia from Gleerups förlag. The study refers to editions from 1989, 1996 and 2011. General parts from Lgy 70, Lpf 94 and Gy 11 are also central for my study.

Skolan i demokratisk utveckling : Förändringar i lärar- och elevrelationer

This work is designed to monitor developments in the relationship between teacher and student in the school environment, but also outside, from the 1950s until today. The survey was based on four interviews with teachers in the same age, and based on their life stories. Their experiences range from student to novice teachers and a long working life until retirement. In addition, all four children has a parent perspective. The following issues have been focused:                      1.What factors have been crucial in teaching elevrelationens development from the 1950s up     to today?                      2.

Bokbussens inköp och urval på 2010-talet.

The purpose of this study is to describe and analyzes how the bookmobile librarians approach to purchase and selection and the range of views that may exist. The study is based on a qualitative method using a document study and three interviews included. The document study looking closely at public libraries library plans in Vastra Gotalands county. The qualitative interviews gets a closer look at librarians´approach regarding the purchase and selection and also if there are any similarities or differences between mobile library activities versus the main library.The theoretical framework is based on Sanna Taljas study where she has identified three different perspectives on the library´s music department. These are categorized as the interpretative repertoires and involves three categories of approach to quality.

I väntan på något annat : en studie av tillfälliga platser ur ett planerarperspektiv

The term Temporary places could be used to describe a wide range of shapes, functions and not least different time sets . In this thesis, however, the intention of temporality should be seen as the main definition regarding this subject. This thesis is based on a literature study and the aim is to explore temporary places, their values and their functions. Furthermore, the purpose is also to highlight temporary places as a method to be used by urban planners, in order to create more flexibility in the city planning of today. The thesis describes the underlying factors and conditions creating an increased interest in flexible planning. Furthermore, a number of tactics and applications are presented, all drawn from current research on the topic.

SL.se från användarens perspektiv : En granskning av Storstockholms Lokaltrafiks hemsida

This study is a thorough comparison between what people think about the website www.sl.se, which is a Swedish web-based travel planner for Stockholm metropolitan public transport (such as subways, busses and suburban trains), and how these views compares to the design of the actual website itself. The travel planner offers a wide range of functions and services for their targeted audience to find the fastest route between their current location and their destination. These functions are for example real time information on hold ups and malfunctions on different travel routes, and an interactive map of specific destinations so that the user can get a clear view of the area and nearby traffic stops. But how much does the average user care for these functions, and how often are they used on an average visit? What are the users? motivations when they visit the site? Earlier research suggested that there are services and functions on this website that are useful and well crafted, but that some people may not be aware of.

Viljan att veta : en analys av Mona Hatoums verk Corps étranger via bio-politik och science fiction

In this paper Mona Hatoums installation Corps étranger is discussed via a post structuralized method based on associative and semiotic comparisons with vanitas, a post-modern self-portrait, and as a representative for modern visual art. The analyze touches upon pornography, science fiction and the quest for scientific conquest in outer and inner space. Theoretical references are Foucault, Freud, Lacan, Barthes, Dolar, Said and Virilio. Hatoum makes the observer a voyageur with the aid of the latest medical technology, endoscope, which gives her the opportunity to make an introvert self-portrait when she films her own throat and rectum. But at the same time she makes the portrait of us all.

Häckar för Norrland

I have observed that hedges are not as prevalent in gardens in the north of Sweden as in the south despite a number of beneficial qualities attached to their use. Consequently, the primary purpose of this essay is to examine the potential for the use of ligneous or woody plants as hedges in a cold climate. The aim of this study is to provide information about the various varieties of ligneous plants that can be used for both pruned and unclipped hedges in the north of Sweden. Because the hardiness of the ligneous plants is a vital factor here, only plants that are hardy enough to survive in the Swedish hardiness zones V to VIII are included in this study. Roses, dwarf shrubs, conifers, bushes with a final height of less than 1 metre and plants that ?bleed? have been excluded.

Samhällsinformation i Göteborg : en jämförande studie av förmedlare av samhällsinformation

The aim of this master's thesis is a comparative study on units for civic information in Göteborg. The study is based on a project currently in progress at the main public library in Göteborg. It is observed that according to the library's mission statement the library aims to become the most competent intermediary of civic information in Göteborg. This statement suggests a competitive strategy towards other intermediaries of civic information. The mission statement does, however, also state that their goal is to be obtained in cooperation with other intermediaries.

MPD-vågformer för helikopterradar

A helicopter based system equipped with a millimetre-wave fire control radar is studied for improvement of the detection probability for moving ground targets. The system is a pulse doppler radar that sends out the electromagnetic wave in repetitive pulses. The frequency in which radar sends this pulse is called Pulse Repetition Frequency (PRF). The velocity of the moving targets is measured by spectral analysis of the pulses received. With this sort of system some targets will not be possible to detect.

Utvärdering av närstridsillustrator : Piloters expertis till stöd för framtida utveckling

This thesis describes the evaluation of a prototype (Illustrator) for future simulator training of Within Visual Range - combat in the Swedish Air Force. The main focus was to collect and transform user acceptance data (expert opinions) to useful guidelines for continued development. Thirteen active fighter pilots participated in the study. The aim was to use expert opinion to study a) the psychological user acceptance, and b) the technical user acceptance, of the Illustrator together with c) gathering opinions for future improvement. Three psychological aspects were rated before and after the sessions to measure psychological user acceptance.

Hälsosammare snabbmat ? upplevda möjligheter och problem bland restauranger : En intervjuundersökning ur snabbmatsrestaurangers perspektiv

Background: Over the past 30 years the incidence of overweight and obesity has increased. Obesity is a risk factor for many diseases, for instance type 2 Diabetes, cardiovascular diseases, many types of cancer and musculoskeletal diseases. That ready available food today is so accessible can be a reason for the public health problems of overweight and obesity.Objective: The aim was to study what possibilities and barriers there are for fast-food restaurants to sell healthy food.Methods: Information was collected by seven telephone interviews and two respondents answered by e-mail. Nine persons that were in charge of the menu at different fast-food restaurant chains in Sweden participated in the study.Results: To have a large variety was considered to be a problem for selling healthy food, also because the sale of it was low in some of the fast-food chains. Some of the informants did not find any problems with selling healthy food and it was regarded as an opportunity to get more consumers.Conclusion: The demand for healthier food has increased, and the offer and sales of it has also escalated.

Genetic variation in local Swedish sheep breeds

Sheep have played a very important part in rural history. In Sweden there were many kinds of small native breeds, kept for their meat and fleece. Women cared for the flock that often had very little to feed on during the cold and sometimes harsh winter months. This meant that these sheep over time acquired special phenotypic properties depending on the environment they lived in, and easily fed compared to modern breeds kept for meat. Most of these sheep have since become extinct.

Begåvningsnivå och psykiska problem - en undersökning av en kohort tvångsvårdade flickor och kvinnor

This study describes the intellectual ability of a cohort consisting of 120 young women in compulsory care at a SiS institution in Sweden, tested and analyzed between January 2001 and May 2005. The women have been tested with the intelligence tests WISC-III or WAIS-R, as well as the personality trait tests BCT, CMPS and SCL-90, and the personality disorder test SCID-II. This material has been analyzed to investigate how these women's intellectual ability relates to other factors. The analyses show that the main difference between the women of this study and the normal population is their level of intelligence and presence of personality disorders. The IQ level of these women is statistically proven on an average one standard deviation lower than the normal population.

"Nej det är inte våld....det var inte med flit" - Tonåringars syn på våld i nära relation

This is a study about the relation between the Swedish school and the political system of Sweden. I wanted to see if the relation had changed since the election of 2010 as it was in that election the Sweden Democrats got over five percent of the votes and took seat in the Swedish parliament. The thing that is unique about this election is that it was really the first time a right-wing party had been elected into the Swedish parliament. Many experts argue that this is the first xenophobic party that has been elected into the Swedish parliament. This led to a problem for schools and their principals and a difficult question to answer because xenophobia is contrary to the school?s core values and the school?s democratic mission.Should the school still be open for political parties? How do schools manage to distinguish between political information and political propaganda? If parties still are welcome into the schools, which parties should be allowed? The equality ombudsman has said in a report that the schools have to comply with the principle of objectivity, which stipulates that the public sector has to be unbiased.I have chosen to make use of a qualitative method because I think the study then gets a deeper understanding of the topic.

<- Föregående sida 20 Nästa sida ->