This study compares the sample variance of the mean in a simple random sample (SRS) and a systematic sample from a surface. The study also compares the prediction error variance in a SRS and systematic sample from a random field. Recommendations are presented on which method to use in the clearance and exemption process in the nuclear industry. The results indicate that quadratic systematic sampling outperformed SRS in most instances and proved to be especially efficient in the presence of a long-ranged covariance function and high sampling intensity (i.e. short distances between observations).

The main purpose of this Masters thesis is to examine three Swedish librarians views on their role regarding their local learning centre and its adult students. The thesis also tries to find out whether the persons responsible for the local learning centres in these municipalities regard the libraries as a resource in this context and if the municipalities express the importance of such a cooperation in documents. Previous research in information seeking and learning is presented and a survey of lifelong learning, local learning centres and libraries is made. Relevant theories, such as Loertschers taxonomy, Kuhlthaus approaches of library skills instruction and levels of mediation as well as Bruces categories of information literacy, are presented and later used in the analysis. A qualitative method was found to be most appropriate for this study, as the majority of the empirical material has been collected through interviews.

Syftet med denna rapport är att utreda vad matematik- respektive karaktärsämneslärare på yrkesprogrammen på gymnasiet anser att det finns för för- respektive nackdelar med en ämnesintegrering mellan deras ämnen. Med hjälp av en enkät har de två grupperna fått delge sina för- och nackdelar samt i vilken utsträckning de tillämpar en sådan ämnesintegrering. Enkäten användes också som underlag för en intervju som låg till grund för en beskrivning av hur ett ämnesintegrerat arbete kan gå till. Majoriteten av lärarna var positiva till att ämnesintegrera och ansåg att de tillämpade en sådan undervisning men endast ett fåtal samarbetade med sina kollegor över ämnesgränserna..

This work is about how teachers describe their work with mathematics in a traditional nursery school and a Montessori preschool. Another aim is to study how children mathematise on the two different preschools and to see if there are any differences between the various educational theories and practices mathematising. I have used two methods wich is interviews with preschool teachers, and observation of the children. The results of my study was that differences exist but the biggest difference is the material that Montessori uses. The difference between the teachers' way of teaching mathematics is to Montessori preschool places great emphasis on the material and how it is used, while in the traditional preschool puts the emphasis on learning through interaction with others.

The aim of this study is to fill the gap in mathematics education research concerning the relationship between identity and positioning in mathematical collaboration in groups. This study elaborates on the relationship between how pupils see themselves as math students in sixth grade, how they show their identities as math students, in contrast to how they position themselves reflexively in group collaboration while engaging in mathematical problem solving. The theoretical concepts linked to this study are discourse, identity and positioning. Discourse is used to describe and form the setting and context of the study. Identity is seen as a transient and elusive concept formed by the students own perceptions of self through narratives.

Sahlgrenska Academyat University of GothenburgDepartment of Internal Medicine and Clinical NutritionAbstractTitle: Oral intake of green tea and its effect on the appearance of UV-induced erythema, erythema solare ? A systematic literature reviewAuthors: Ernita Antoni Mulliqi and Pernilla GustafssonSupervisor: Sofia KlingbergExaminer: Ingrid LarssonProgramme: Dietetics programme, 180/240 ECTSType of paper: Examination paper, 15 hpDate: April 10, 2013Background: UV irradiation of the skin can cause erythema, clinically called erythema solare. The condition can exert pain as well as discomfort and may in the long term lead to negative effects including skin cancer. Green tea contains catechins which are substances with anti-inflammatory effect that may have positive effects on the skin. The intake of green tea is believed to have a protective effect against UV irradiation, since green tea extracts in lotions in previous studies have shown to increase the skin tolerance level against UV irradiation.Objective: To examine the scientific basis and determine whether an oral intake of green tea has a protective effect against UV-induced erythema.Search strategy: Searches in the scientific databases PubMed and Scopus were made to find suitable articles.

In the school subject of the natural sciences it is imperative that the students are given opportunities to ?talk science?, since the dialogues that occur in the classroom have a significant importance for the students? abilities to engage in meaning-making in their learning process. Hence, the student and teacher interaction in the classroom and the feedback given there play a significant role in the students? learning process. The aim of this study is to contribute to the development of formative assessment tools that can mediate the students? meaning-making in natural sciences subjects in upper-secondary school.

MedView-projektet, som startades 1995, är en av många organisationer som söker webbasera sin information. Projektet är ett tvärvetenskapligt samarbete mellan disciplinerna oral medicin och datavetenskap och inom projektet har en samling av applikationer tagits fram som kan lagra samt presentera data. Den insamlade informationen sparas i en filbaserad kunskapsbas.Tanken är nu, vilket angavs i projektets anslagsansökan till Vinnova 2003, att webbasera denna kunskapsbas så att kliniker inom oral medicin samt andra intresserade inom området skall ha tillgång till informationen. Detta arbete behandlar framtagandet av en central webbplats med ett tillhörande behörighetssystem.I detta arbete visas att UNIX behörighetsmodell kan användas som utgångspunkt för att skapa ett webbaserat behörighetssystem samt att de krav som identifierats kan implementeras tillsammans med behörighetssystemet i en central webbplats för MedView.

This report is a description of a developed educational simulator over rail vehicles and its components. The simulator is a hardware-based prototype over a door system on rail vehi- cles. System specialists and technicians will use the prototype. The Simulator should give the user a technical demonstration on how components work in a door system. The proto- type consists of motor, switch, relay and sensor.

Bakgrund: Astma är en kronisk inflammatorisk luftvägssjukdom som är vanligt förekommande i alla åldersgrupper. Över 300 miljoner människor världen över beräknas ha sjukdomen.Syfte: Syftet med litteraturstudien var att undersöka om den orala hälsan hos barn med astma skiljer sig från den orala hälsan hos barn utan astma.Metod: Metoden som användes var en allmän litteraturstudie och litteratursökningarna gjordes i den medicinska databasen PubMed. Resultatet baseras utifrån en sammanställning av 13 vetenskapliga artiklar. Artiklarna var kliniska studier och 11 av dessa hade en kontrollgrupp där barn med och utan astma jämfördes. Övriga två artiklar studerade antingen hur den orala hälsan påverkades av kombinationsbehandling med specifika läkemedel eller jämförde den orala hälsan hos barn med olika duration och medicinering mot astma.Resultat: Några av de inkluderade studierna fann att barn med astma hade en ökad kariesförekomst jämfört med barn utan astma, medan andra studier visade att det inte fanns någon skillnad mellan grupperna.

This study is about the above-average pupils? situation in schools and how teachers work to encourage and motivate these pupils' development in mathematics. The purpose of this study is to find out how a group of teachers work with above-average pupils in mathematics. The study addresses previous research on these students' school situation and how teachers should work with them. There have been unstructured interviews with a number of educators to get a personal insight into how they work with above-average pupils.

We have done a qualitative and quantitative study about math problems on second­ary school students. The study is based on the diagnosis, treatment and training of teachers, about students who have math difficulties. The aim of this work is to obtain teachers ?perceptions about students? diagnosis, treatment / improvement and continuing education for students who have math difficulties. By having interviewed various teachers through surveys we have received answers to their concerns about the diagnosis, treatment and the importance of continuous training of teachers on students? mathematics difficulties.

This report is a description of a developed educational simulator over rail vehicles and its components. The simulator is a hardware-based prototype over a door system on rail vehi- cles. System specialists and technicians will use the prototype. The Simulator should give the user a technical demonstration on how components work in a door system. The proto- type consists of motor, switch, relay and sensor.

Aim: The study aims to investigate the distribution of grades between students in a practical subject and in a theoretical subject.The problem:What is the grade distribution in physical education and mathematics, with respect to gender, socioeconomic background, parental education, ethnicity, and physical activity?Method:To answer the aim of the study a quantitative method was chosen. As the collection method used was questionnaires to 620 students in the 9th grade in Stockholm. Of the 620 questionnaires, 597 questionnaires were used for the static analysis. The method of analysis used cross tables and logistic regression analysis.

Transition to Non-Compulsory EducationScrutinizing flaws in Students? knowledge in Mathematics.