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1020 Uppsatser om Vignette experiment - Sida 10 av 68

Gremmeniella abietina-epidemin 2001 : har skogen återhämtat sig?

The fungus Gremmeniella abietina causes damage to conifers that can lead to tree death. In 1999 and 2001 the pathogen caused severe attacks in Sweden, where about 500 000 ha of pine forest were affected. Trees of all ages were attacked, but mainly forests between 30-60 years that were ready for their first commercial thinning. After recommendations from the forest agency, sanitary fellings were made to trees that had more needle loss than 85%, a total of about 50 000 ha. Economic losses have been estimated to more than one billion SEK.

Socialarbetares förståelse av våld i nära relation : En vinjettstudie med barnavårdsutredare

Social workers ideas about what domestic violence is influence their ability to recognize vio-lence in cases where this occurs. Social workers awareness and understanding of domestic violence can also influence the handling of these cases. Education on the subject domestic violence can increase social workers knowledge about, awareness and handling of violence. The present study aims to investigate how social workers in child protection investigations understand, recognize and interpret domestic violence and which interventions the social workers suggest. This is a qualitative vignette study in which semi-structured interviews was carried out with social workers working with child protection investigations.

Pris som kvalitetsindikator : ? En experimentell studie

Det kan vara svårt att som konsument bedöma en produkts kvalitet på objektiva grunder. När sådan osäkerhet uppstår fungerar ofta produktens pris som en lättillgänglig och lättföståeligkvalitetsindikator. En lågt prissatt produkt uppfattas då ha låg kvalitet, medan en högt prissatt produkt uppfattas besitta hög kvalitet.Detta är en kvantitativ studie där vi gjort ett experiment med 126 studenter vid Umeå Universitet i syfte att kartlägga relationen mellan pris och uppfattat produktkvalitet. Vi har formulerat ett antal hypoteser grundade i huruvida konsumenter använder sig av pris för attkvalitetsutvärdera en produkt. Vi testar sedan om ett sådant agerande beror på vilket sinne som används vid produktutvärderingen, samt om kön och hur ofta konsumenten använderprodukten i fråga påverkar detta.I det experiment vi genomfört användes tre produktkategorier som alla svarar mot olika sinnen.

Vermicompost for reduction of vegetable waste - and a possible means to produce fish feed in aquaponic systems?

Aquaponics is a food production system consisting of a consecutive cultivation of plants and aquatic animals, fish or shellfish, in recirculating water. The plants feed on the nutritious effluents from the fish tank and bacteria converts ammonia from the fish tank into nitrate that is absorbed by the plants. The plants receive nutrition and the fish gain purified water. The environmental impact of the production of fish meal and fish oil used in conventional fish feed includes a large consumption of fossil fuels with subsequent carbon dioxide emission. The aquaponic system can be made environmentally sustainable and self-supporting if supplemented with a vermicompost/vermiculture for the production of worm protein as a fish feed. Vegetable waste from the hydroponic part of the system can be reused as worm feed in the compost and the protein rich worms can be harvested, dried and grinded and brought back to the aquaculture as fish feed. As a first step in this direction, I have investigated the effect of recycling of vegetable waste in vermicomposts on the growth and number of earthworms (this was evaluated after harvesting). The hypotheses were that earthworms can be cultivated in the vegetable waste and that by adding manure to the vermicompost it is possible to obtain a nutrient content adequate to support a continuous worm harvest, in other words create a vermiculture. Eisenia fetida and Dendrobaena veneta were grown in 20 L bins containing peat mixed with either poultry or cattle manure. The proportions were 70% peat and 30 % manure. Discarded plant parts from lettuce cultivation was added to the vermicomposts (35 g per week) and water was supplied with 0.8 L per week.

Ett demokratiskt experiment: ett utvecklingsarbete i
gymnasieskolan med inriktning mot en demokratisk undervisning
utifrån värdegrund, styrdokument och lagar i skolan

Syftet med mitt examensarbete var, att undersöka om ett demokratiskt projekt i skolan för att utveckla verksamheten i demokratisk riktning, kan uppfattas som mer demokratiskt av eleverna i jämförelse med den hittills bedrivna undervisningen. Med demokratiskt projekt menar jag, att utifrån den demokratiska skolans värdegrund, styrdokument, lagstiftning och även jämlikhet planera undervisningen. Undervisningen har innehållit traditionellt grupparbete med självvalda grupper och grupparbete med slumpvis vald sammansättning. Gruppenkät har använts som metod, för att utröna elevernas attityd till demokratiinslaget i den hittills förda undervisningen och sammaledes till utvärdering av mitt experiment. Observation har använts som kompletterande metod, för att verifiera mina iakttagelser i experimentet.

Livet på en pinne

Att fotografera kan ibland vara förutsägbart och det är lätt att man fastnar innanför givna ramar. I det här arbetet har vi försökt hitta alternativa vägar och nya sätt att fotografera. I arbetet kommer ni kunna följa arbetsprocessen från skiss till färdig konstruktion samt resultatet av våra experiment..

Defuse : Fast och fo?ljsamt; en serie formexperiment

Uppsatsen är dels en skriftlig dokumentation av en konstnärlig process i sökande av design genom begreppen fast och följsamt samt gestaltandet, dokumenterat genom fotografi, av ett experimenterande av kontrasterande material. .

Boksamtal : -En studie av en lärares arbete med skönlitteratur i en sfi-klass

Syftet med denna studie är att undersöka, analysera och diskutera barns frågor och reflektioner under ett experiment med naturvetenskapligt innehåll. En del av syftet är också att undersöka samspelet mellan barnen under experimentet.Studien är kvalitativ med inspiration av fenomenografisk forskningsansats. Det sociokulturella perspektivet har varit den teoretiska utgångspunkten. Med hjälp av videoobservationer har nio barn i åldern fyra till fem år observerats under experiment som innehåller momenten flyta och sjunka. Det är barnens verbala och icke verbala uttryck som ligger till grund för min analys.Resultatet visar på att barn ställer många frågor med olika fokus, är intresserade och vill vara delaktiga under experimentet.

Dexametasons effekt på trombocytaggregering och syreradikalproduktion

Platelets are important for the healing of damaged blood vessels since they have an importantpart to play in the coagulation process. At the same time, the blood must be kept fluid and notcoagulate at the wrong time. Therefore there are factors that effect the aggregation of plateletsin a positive or a negative way.Previous investigations have shown that platelets during stirring conditions produce reactiveoxygen species (ROS) that weaken the inhibiting effect of nitric oxides (NO) on platelets andthat the drug Dexamethasone (Dex) can reduce the ROS-production.The aim of this project was to investigate if glucocorticoids, in this case Dexamethasone,could restore the inhibiting effect of NO on platelets and if there was any decrease in ROS-production.The result of the ROS-measurements showed a great variance and it was difficult to draw anyconclusions from them, but a clear decrease in ROS, as previous reported, was not shown. In the aggregation experiments the inhibiting effect of NO was observed through the drug S-nitroso-N-acetylpenicillamine (SNAP), a NO-donator.From the aggregation experiments, the result seemed to be that SNAP during longerincubation time lost its inhibiting effect, probably because the cells become desensitized.With superoxid dismutase (SOD), the effect of SNAP increased, both in the experiment withlonger and shorter incubation times. Dex seemed to reinforce the aggregation in relation toboth SOD and SNAP.

Svenskt och norskt barnavårdsarbete : en jämförande studie av socialtjänstens konkreta barnavårdsarbete

This essay aims to examine and compare Swedish and Norwegian social work with children. It is a comparative study between two social welfare offices, in districts with similar population and problems, one located in Stockholm and one in Oslo. The main questions were; how is the work organized and carried out, what type of help and assistance is available and what kind of discretion and powers do the social workers have. In our essay we used qualitative methods mostly based on interviews, vignette questionnaires and documents, but also written research. In our analysis we used modern organisation theory and street level bureaucracy to seek explanations.The two welfare offices have similarities and differences.

Lära för livet ? eller för provet på fredag? : - ett experiment med oförberedda prov inom historieundervisningen i två åttondeklasser

Detta arbete behandlar oförberedda prov ? något som det forskats lite om ? och utgår från tanken att ytinlärning och provfokusering är vanligt i skolan. Ett antagande om det oförberedda provet som verktyg mot sådana förhållanden förs fram. Den huvudsakliga avsikten med arbetet har varit att belysa för- och nackdelar med oförberedda prov som bedömningsinstrument, samt att tydliggöra eventuella kopplingar mellan ett provs förberedda/oförberedda karaktär och elevers studiestrategier. Arbetets resultat grundar sig på dels ett experiment och dels ett enkätunderlag.

Avskiljning av ammoniumkväve och fosfatfosfor i reaktiva filtermaterial : skak- och kolonnförsök

In Sweden more than 400 000 private households have not yet sufficient wastewater purification. These effluent is considered as an increasing problem and many onsite purification methods have been studied. In this investigation, the method of reactive bed filters have been tested by column and batch experiments. Five different kinds of filter materials with reactive surfaces have been studied concerning their capacity to absorb ammonium and phosphorus from wastewater. The materials that were examined are Filtra N, wollastonite Filtra P, blast furnace slag and Polonite®.

Komplementära produktegenskaper i merförsäljningsförsök

The modern beauty market is concentrated with intense competition where cosmetic brands fight to stay on top. A popular method in order to gain sales and increase margins is to influence existing customers to buy more with the use of suggestive selling. The purpose of this paper, was to further examine the different effects of suggestive selling with the use of complementary versus non- complementary goods in the form of customer satisfaction, customer view of the service encounter, as well as success in sales. In addition, the influence of the customer's purchase amount on the tendency to buy an extra product in a suggestive selling situation was examined. The study was conducted through the use of a field experiment with the support of surveys in 'The Body Shop'.

En ny sångfågel i marknadsföringsdjungeln: En kvantitativ studie om Twitters potential som marknadsföringsmedium

Advertisers of today are facing a great challenge in a landscape where it becomes even more difficult to break through the clutter and convince consumers to buy their products. In order to succeed, they need to come up with new ways of communicating with their customers. The purpose of this paper is to investigate if micro-blogging could be considered an effective media choice in order to enhance the perception of brand associations and traditional communication effects. The subject is of interest as brands are putting increasingly more resources into this communication channel. However, at the current date the marketing effects of micro-blogging is unexplored in academic research.

En komparativ litteraturstudie av olika termkällor för query expansion

The purpose of this thesis is to make a comparative literary study of ten laboratory experiments with different kind of sources for query expansion terms. The experiments are grouped according to categories of term sources, which are: search results, collection dependent knowledge structures, collection independent knowledge structures and one that combines the two last mentioned sources into one. To enable a comparison all other variables were held as constant as possible. There is the improvement measured in mean average precision, which is used to measure the various sources potential. The result from the study shows a strong connection between the kind of source for the expansion term and improvement of the result.

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