Sökresultat:
14305 Uppsatser om Difference- in- difference analys - Sida 26 av 954
Barn- och ungdomars uppfattning om sin övervikt och fetma som ett problem samt skillnader i aktivitetsnivån hos barn- och ungdomar beroende på deras sociala familjesituation
BackgroundIncreased prevalence of obesity in children- and young adults and risk for diseases related to obesity will increase the burden on medical care. It is important to identify early risk factors that can be noticed by nurses in the daily work.AimThe aim was to investigate whether children- and young adults themselves perceive overweight as a problem and if there was a difference in the measured activity levels between overweight children- and young adults in families with different socio-economic family status.Method descriptionExisting survey from the Obesity Centre at the Akademiska Sjukhuset were examined together with the results from an accelerometer, where children- and young adults activity was recorded, compared to their perception of how active they were. The results were compared using a statistical software program and compiled with descriptive and non-parametric statistics.ResultsThe results do suggest that the majority of children- and young adults experiencing excessive weight have a problem in their everyday lives. Nearly half overestimate themselves as more active than what the actual measurements with accelerometer demonstrated. Much time is spent in front of the TV and computers.
Föreställande som verktyg för förändrad förståelse: en studie
om elevers lärande av ett särskildt objekt
This thesis attempts to describe the application of variation theory, as developed by Ference Marton, at a Swedish primary school, intermediate level. The aim of the thesis was to investigate some aspects of a learning process. The students were introduced with the theme of ?sustainable ecological development?. This included theoretical and practical knowledge of the art of sustainable living.
Traditionella växtbaserade läkemedel. : Är Echinacea och Ginkgo terapeutiskt verksamma?
SummaryHerbal remedies have been used for many years to alleviate various symptoms. They were used in ritual acts to reassure the Gods and as medication. Plants as rhubarb and ginseng were used in China long time ago. The Egyptians had knowledge of herbal medicine such as aloe, myrrh and henbane, 1550 BC. The father of medicine Hippocrates used a large number of herbal medicines, and had many theories on the subject.Different parts of the plant can be used to extract the active ingredients.
Talande Toner : En studie om förskollärares uppfattningar angående tidig språkutveckling.
Abstract The purpose of the study is to examine how children perceive the relation between play and sex and analyse it from a gender perspective. This by answering the questions: "Is the children?s choice of place, materials and company in play dependent on gender?" and "Is there a significant difference between the sexes and/or ages?" The study was done through twelve focusgroup interviews with three children in each group except two groups of two children in each. Eight boys and nine girls of six years old and nine boys and eight girls of nine years old were interviewed. Boys and girls were interviewed in separate groups and the questions were open ended and followed up.
Effects of Driver, Vehicle, and Environment Characteristics on Collision Warning System Design
The purpose of the present study was to examine effects of driver, vehicle, and environment characteristics on Collision Warning System (CWS) design. One hypothesis was made that the capability of collision avoidance would not be same among a driver, vehicle, and environment group with different characteristics. Accident analysis and quantitative analysis was used to examine this hypothesis in terms of ?risk? and ?safety margin? respectively. Rear-end collision had a stronger focus in the present study.
Diabetes hos hund : utfodring, motion och vikt som möjliga predisponerande faktorer
This is a study of some risk factors for Diabetes Mellitus (DM) in dogs. As a pilot study it is meant to give information to be used in a planned later, larger and better controlled study. The present study hypothesized that suboptimal feeding (high percentage of homemade and table foods), lack of activity and overweight contribute to the risk of DM. Twenty consecutive dogs diagnosed with DM at the Veterinary University Clinic in Uppsala between 2000 ? 2003 were chosen as the experimental group.
Normativa värden för läppkraft hos barn mellan fem och tio år : Relaterat till bilabial stavelseproduktion
Lip force has been found to affect the ability to achieve satisfying speech production and swallowing. A normative value for lip force in adults has been measured to 15 Newton (N). Corresponding value for children measured with Lip Force Meter 100 (LF100) does not exist. In the current study lip force was measured in children between the ages of five and ten years. The aim of the study was to obtain normative values for children with typical development in separate age groups.
Evaluation and Comparison of Ecological Models Simulating Nitrogen Processes in Treatment Wetlands,Implemented in Modelica
Two ecological models of nitrogen processes in treatment wetlands have been evaluated and compared. These models have been implemented, simulated, and visualized in the Modelica language. The differences and similarities between the Modelica modeling environment used in this thesis and other environments or tools for ecological modeling have been evaluated. The modeling tools evaluated are PowerSim, Simile, Stella, the MathModelica Model Editor, and WEST. The evaluation and the analysis have been performed using McCall?s factors for software quality (McCall et al, 1977), a correlation analysis and the Constant Comparative Method (Glaser&Strauss, 1999).
Information till mjölkföretaget : vilken information behövs och hur bör den utformas när gården ska ta investeringsbeslut?
The fast developments in information and data technology during the recent years have accentuated the need for the business manager to interpret and act on information from the surrounding environment. Today we know little about what information is really used in the unique decision-making. Further, little is known about how information should be designed to fit people with a more intuitive approach to interpreting information. This study is therefore about the difference between peoples approach to interpreting information and how information should be designed to fit those with a more intuitive approach to interpreting information. The application is made to dairy farms in Sweden.
The literature review describes the strategic leadership, the decision-making process and the intuitive and the analytic thinking.
Heder, handlingsplaner och handlingsutrymme : En studie av socialsekreterares arbete med hedersrelaterad problematik
The study aims to describe and analyse the relationship between norm and practice regarding social services casework on honour-related problems. The relationship between norm and practice involves the difference between the way it is intended that social workers shall operate in these cases and how they perceive that this works in practice. We interviewed two focus groups of eight Swedish social workers, four in each group. We also held an individual interview with a social services business developer. Focus group interviews were based on two vignettes; one depicting an honour-related case and the second an "ordinary" case.
Hur påverkar gummigolv i grisningsboxen suggans liggtider, liggbeteende och hennes tid för att lägga sig?
In the farrowing pens the amount of bedding material and the quality of the concrete floor has a huge impact on both the sow and the piglets. In this study imbedding of
rubber flooring on the solid area in the farrowing pen was used to see if it had any effects on the sows lying behaviour when compared to concrete. Another important
aspect was to evaluate if the rubber floorings had a high enough durability to resist the normal wear in a farrowing pen. Concrete flooring is assumed to have a higher thermally
conductive effect then rubber which can affect the sow?s chance to cool down.
Iterabilitet, upprepning och permanens : En kritisk analys av debatten mellan Derrida och Searle
The essay seeks to clarify some of the decisive but often obscured issues in the famous debate between Jacques Derrida and Jonn F. Searle. The debate commenced in 1977 with the publication in Glyph of Derrida?s lecture Signature Event Context from -71, followed by Searle?s Reiterating the Differences. A Reply to Derrida and subsequently Derrida?s reply Limited Inc a b c ? which encouraged Searle to renew his criticism.
OTEC för Tarawa
Ocean Thermal Energy Conversion, OTEC, a technology using the temperature difference between cold deep seawater and warm surface water, can extract the work in the form of electricity. OTEC gives also synergies of drinkable fresh water. The temperature difference has an impact on the efficiency of the technology, which means that the feasibility of OTEC is geographically limited. The project intends to explore the possibility of replacing the atoll Tarawa?s present electricity generation with an OTEC plant and to explore synergies. In the present situation all of Tarawa?s electricity is generated by fossil fuels.
Fosforgödslingseffektivitet i långliggande bördighetsförsök
Rapid population growth and the fact that phosphorous is a limited resource implies that the question regarding an efficient use of phosphorus is of great importance, and consequently,that the phosphorous use efficiency should be as high as possible. The view on phosphorous use efficiency, and how this is calculated, has varied over time. This has had great implications on what type of research that has been conducted, which have resulted in an
inconsistency between the academic?s view on the subject and recommendations received by farmers. The purpose of this paper is to calculate the phosphorus use efficiency in the Swedish long term fertility experiments.
Alla barn är lika mycket värda : En kvalitativ studie om hur barn framställs i KappAhls reklamfilmer
I have written an essay called ?All children are equally worth - A qualitative analysis of how children are produced in KappAhls commercials?.The purpose of this thesis is to do a study of the swedish clothing company KappAhl?s commercials. My purpose is divided into three questions: With which clothing colours are girls and boys represented in the commercials? Is there any difference in the making of ?non-white? and ?white? children in the commercials? and What is being transmitted in KappAhl?s commercials, where the focus should lay on the clothes?My material consists of three selected video clips from KappAhl?s Youtube channel. The three commercials are named: 1, Back to school, 2, Children?s christmas and 3, KappAhl 3 för 2 på alla överdelar för barn (translation: KappAhl 3 for 2 on all children?s tops).