In the current situation there is not much written about assessment of laboratory work, and the majority of the working physics teachers are retiring and there are only a few newly qualified physics teachers. The purpose of this thesis is to examine how physics teachers assess laboratory work within upper secondary schools, with Gy2011 in mind. The new grade system, Gy2011, has a larger focus on the laboratory work then the earlier system Lpf 94. Skolverket has in their man-ual with examples of assessment two different sorts of laboratory Experiments. The first assess-ment is regarding the planning of a laboratory work and the other about how able the pupil exe-cutes laboratory work.

AbstractThe purpose of this study is to answer the following questions regarding confirmation: In what ways do children seek confirmation in preschool? What are children confirmed for and how do they react to the confirmation? How is confirmation used by teachers? What do children want to receive confirmation for?The starting point for this study is based on the unique theories of Skinner, Maslow and Bronfenbrenner. The main focus with regard to Skinner?s theory (in this study) lies in reinforcement. In Maslow?s theory, the concentration is on hierarchy of needs while in Bronfenbrenner?s theory, the study centers upon interaction.

The purpose of this study is to investigate witch knowledge and thoughts children will have about the term of floating and sinking, and witch possibilities there is to make various knowledge visible in preschool physics through playing with water. The study also concern the differences and similarities between two different groups of age who have participated in the study. The study was carried out by an activity with participant observation and feedback interviews afterwards. The result shows that the possibilities to physics are many in preschool. The children expressed new thoughts and ideas who concern other phenomena in physics during the investigation and discussed similar Experiments and material to examine.

AbstractThis report is about the creation of a test system for development of a control system for a off the shelf RC-helicopter, which can be bought for about two thousand SEK. The test system consists of both electronics for controlling the helicopter and mechanical constrainer. The constrainer is used for mounting the helicopter so that it won´t crash.A circuit board including processor and sensors was manufactured. This was used for doing test of the different control algorithms. In this way were we able to analyze the quality of the sensors chosen, and what other sensors that could contribute to the control of the system.Basic helicopter control have been studied and presented in the report.

TCP (Transmission Control Protocol) is a transport protocol designed for the wired Internet. In wireless networks packet losses occur more frequently due to the unreliability of the physical link. The main problem is that TCP treats all losses as congestion, which leads to a lower throughput. Ad hoc networks are multihop wireless networks of mobile nodes, where each node can allow other packets to pass through it. Topology changes often occur and may lead to packet losses and delays, which TCP misinterprets as congestion.

This report is the written documentation of a project work carried out at the Division of Engineering Materials at Luleå University of Technology in cooperation with Seco Tools AB. The project deals with the analysis of residual stresses in Ti-Al-N thin film grown on WC/Co cutting inserts. The composition of Al varied from 0% up to 75%. Increasing the Al content in the Ti(1-x)Alx N compound improves the compressive residual stresses even after annealing of the material. The Experiments have been performed in a high temperature x-ray diffractometer (HTXRD) where the interplanar atomic spacing was determined in-situ and subsequent converted into stresses.

Sömnsvårigheter hos ungdomar är ett växande problem i Sverige men det saknas forskning om behandlingsmetoder för åldersgruppen. Syftet med studien var att testa kognitiv terapi med beteendeexperiment (KT-I) på gymnasieungdomar med primär insomni. Studien genomfördes enligt en Single Subject design med för- och eftermätning. Tre ungdomar i åldern 16-18 genomgick en sju veckor lång behandling efter 1-2 veckors baslinjemätning. Resultatet visade att svårighetsgrad av insomni minskade, att funktionsförmågan dagtid förbättrades och behandlingsmålen uppfylldes i hög grad.

Sömnsvårigheter hos ungdomar är ett växande problem i Sverige men det saknas forskning om behandlingsmetoder för åldersgruppen. Syftet med studien var att testa kognitiv terapi med beteendeexperiment (KT-I) på gymnasieungdomar med primär insomni. Studien genomfördes enligt en Single Subject design med för- och eftermätning. Tre ungdomar i åldern 16-18 genomgick en sju veckor lång behandling efter 1-2 veckors baslinjemätning. Resultatet visade att svårighetsgrad av insomni minskade, att funktionsförmågan dagtid förbättrades och behandlingsmålen uppfylldes i hög grad.

The outset of this thesis is to raise questions on how we design for the mobile context and the capabilities of smartphones. Not only the presentation but also the use of input and interaction between a service and a user.This work evolves around sign up forms and answers the question: How does the sign up process affect the holistic perspective of a digital service regarding usability and user experience? This thesis consists of a case studies, and design Experiments conducted on Twitter, Instagram and Randos sign up processes to explore if and how the usability, and the user experience could be affected and im- proved.This concluded some important aspects to be considered when designing sign up forms for a digital service.The usability, and the user experience is not only affected by user interaction, and the choice of input method but it?s also affected by which data the service is requesting, and more important; if that data is motivated to request by the service..

The main purpose of this paper is to examine and compare the democratic situation and developement in Malung and Nyköping, through a perspective of participatory and deliberative democratic theories. The questions I?ve examined are On what priorities the actions of developing democracy are built? Which positive effects have been reached and what problems have arisen? What are the solutions they have found to the problems? How does one experience the results of the Experiments and actions taken? What are the similarities and differences between the two cases? and What is their relationship to the theories mentioned above?The questions are answered through interviews with four central actors in each case and examined in relation to participatory and deliberative democratic theories and in comparison of the two cases.The results have been that even if none of the cases respond to one theoretical ideal, they have touches of both theories as well as representative theory. It shows, however, that in Malung the representative democracy theory is the strongest represented in actions and politics, while in Nyköping the participatory democratic theory is stronger. In short, the most positive and negative effects respond well to the theories..

Water is our most important provision and its quality is above all dependent on the geological conditions in the area from where it is extracted. Due to geological properties there are certain areas with an elevated risk of high uranium levels in the ground water, which in turn constitutes a risk for human health. Consumption of water that contains a high concentration of uranium implies a health risk due to the chemical characteristics of uranium. Livsmedelsverket (The National Food Administration) and Socialstyrelsen (The National Board of Health and Welfare) therefore recommend that precautionary measures should be taken when the uranium concentration in ground water exceeds 15 micrograms per litre. In particular, drinking water collected from wells in areas with uranium-rich bedrock may have a harmfully high level of uranium. One of the wells of the Ärla water purification plant, located near Eskilstuna, Sweden, contains water that exceeds the guideline of 15 micrograms per litre. One interesting technique for removing uranium from drinking water is adsorption to reactive filter materials.

Transformation of inorganic mercury (Hg) to methyl mercury (MeHg) is a biotic process that is proposed to be conducted primarily by sulphate reducing bacteria (SRB). The formation of MeHg is of great interest because it is the mercury species that biomagnifies to the greatest extent in the aquatic food webs; about 90 % of all Hg in fish is MeHg. Our understanding of factors involved in the production of MeHg is very important for making a reliable risk assessment. The purposes of this study were to investigate the different factors that control the solubility of Hg and the production of MeHg in a contaminated lake sediment. The lake Ala-Lombolo, Kiruna municipality, is well-known to be contaminated by mercury from different sources. Sediment cores were sampled at three different locations (N, SW and SE) in the lake and divided in three different layers; 0-5, 5-10 and 10-15 cm.

This thesis reports on a case study of a forest company, Stora Enso, and their experience from a number of trials and Experiments with ash recycling. A literature survey and a total of eleven in-depth interviews were carried out. Ash recycling was found to be the concern of three different divisions of the company. The pulp industry which produces the ash, the forest division which would be responsible for identifying land and spreading the ash, and Stora Research, which has had a major part in the design and implementation of research trials. Lacking an overall company decision on ash recycling the matter is left to the individual divisions.

The aim of the study was to investigate if methane emission in a constructed wetland changed in a diurnal pattern correlating to temperature, humidity or light conditions. The gas measurements were carried out with a static chamber technique. The wetland (in Nykvarn outside of Linköping, Sweden) takes care of wastewater to reduce the nitrogen loads. Measurements were carried out at three different occasions in the summer of 1998 on two sites in the wetland. One site was close to the inflow, inhabited by Lemnaceae, and another site was located further downstream inhabited by the emergent macrophyte Typha latifolia.

Hylocomium splendens (Glittering wood-moss) is a common species in the Nordic countries and can be found in many different types of boreal forests. It usually forms dense moss carpets on the forest floor. The shoots grow in segments and new segments form annually on the previous years growth. The size of the segments is probably regulated in a high extent by local micro environmental conditions. Previous Experiments suggest increased growth of H.