Sök:

Sökresultat:

721 Uppsatser om Biological diversity - Sida 10 av 49

Double integrating spheres: A method for assessment of optical properties of biological tissues

The determination of the optical properties of biological tissue is an important issue in laser medicine. The optical properties define the tissue´s absorption and scattering behaviour, and can be expressed by quantities such as the albedo, the optical thickness and the anisotropy coefficient. During this project, a measurement system for the determination of the optical properties was built up. The system consists of a double integrating sphere set-up to perform the necessary reflection and transmission measurements, and a computer algorithm to calculate the optical properties from the measured data. This algorithm is called Inverse Adding Doubling method, and is based on a one-dimensional transport model.

Public service-uppdraget i italiensk television : En innehållsanalys av nyhetsprogrammet Tg1

The main question this bachelor thesis aims to answer is how the public service program Tg1?s news broadcasts may look. The following questions were used to discuss thetendencies of the result: How can the distribution of the news categories appear in Tg1?sbroadcasts? Can the main news be considered as impartial and objective in its linguisticand pictorial representation?To answer the aforementioned question I chose to do a combined study, using aquantitative content analysis and a qualitative content analysis.To lead my research, I focused on two requirements underlined by public servicebroadcasters, namely, objectivity and impartiality, and diversity. The outcome shows thatthe diversity in Tg1?s broadcast is disproportionate and that the pictorial representation isnot impartial and objective without the linguistic part.

Upprördhetens betydelser : Diskursanalys av en känslosam riksdagsdebatt

Today there are many students with behavioral and developmental disorders in schools. One of these disorders is ADHD. The medical designation ADHD stands for Attention Deficit Hyperactivity Disorder. I have chosen to research how two students with ADHD can be included in a fifth grade classroom.This research paper addresses the issues surrounding the student?s day-to-day life with a focus on the classroom.

Hur påverkas ens uppväxt och vuxenliv av att man växt upp i ett familjehem? : en kvalitativ intervjustudie där fyra vuxna tidigare familjehemsplacerade reflekterar över de erfarenheter och upplevelser placeringen medfört

The purpose of this study was to give a picture of how some adults, who earlier was placed in foster homecare, experience that their childhood have affected them during their life. I also wanted to see how the relationship to the biological family has been and developed during the placement. The study has also purposed to receive a deeper knowledge of how it could be to grow up in foster care. To make the purpose of this study complete I chose to use qualitative interviews as a research method. Four adults who earlier were placed in foster homecare have participated in this study.

Mätning av ekosystemtjänster i jordbrukslandskapet :

Abstract In order to make the modern agriculture less dependent on non-renewable external inputs, it has to rely more on ecosystem services. The agricultural system produce not only food, fiber and fuel, it also generates other ecosystem services such as e.g. photosynthesis, recycling of nutrients, influencing local microclimate, pollination, biological control and detoxification of noxious chemicals. This study is an attempt to get a better understanding about the interaction among different ecosystem services and different habitats capacity to generate them. An evaluation of eight different methods is done. The ecosystem services studied are the ability to absorb solar energy, biomass production, botanical diversity, decomposition and natural predation of aphids.

En nyanserad eller homogen judendom? : Hur fem religionsläroböcker för gymnasiet framställer judendomen

This essay aims to examine if five high school textbooks represent Judaism as homogeneous or diverse. The purpose is to see if textbooks add a diverse or homogeneous view on Judaism. The methods for this essay are a qualitative content analysis and an image analysis. The results tells us that both homogeneous and heterogeneous tendencies can be found in the textbooks to a certain extent. The homogeneous tendencies can be explained as an aftereffect of the textbooks? authors becoming limited by their schedule, amount of pages and so on.

Nationella adoptioner i Sverige

The purpose of this study was to examine domestic adoptions in Sweden, and also compare the Swedish adoption system to the Canadian adoption system. I wanted to find out why there are so few domestic adoptions in Sweden, and how it has changed over the years. I also wanted to know why there is such a large difference between Sweden and Canada regarding adoptions.I interviewed five social workers to find out what attitudes the social services have regarding adoptions. My other questions were how the childs best interest is considered when a parent wants to place a child in an adoptivefamily, and which parents decide to place their child instead of keeping it.I found that the social services are reluctant to place children in adoptivefamilies because their main goal is to keep biological families intact. In Canada the social services goal is to provide the child with a safe and stable home.There is no longer any stigma surrounding single mothers and well developed welfaresystems enable most to keep their children.

Liv i d?d ved: En unders?kning av f?rh?llningss?tt till d?d ved p? ?ppeltr?d i tr?dg?rdshandb?cker och bland yrkesverksamma tr?dbesk?rare

In this essay, several factors in apple tree care (specifically in relation to whether dead wood should be kept or removed) are highlighted for example, aesthetics and biodiversity. To present some background, the essay begins by introducing some previous literature on dead wood. This leads into how dead wood is treated within forestry. Next, previous research on dead wood in fruit trees is mentioned. Cultural and historical management methods are also highlighted.

Skydd mot yterosion i slänter av finmorän

Slopes in fine till soils are exposed to surface erosion due to rainfall, snowmelt and upland water sources. Large areas of road slopes are therefore covered for surface erosion protection. Preventive methods like ditches and trenches are also being used. Silt tills are particularly troublesome since the water can bring the soil into suspension and cause mudslides. Different methods for erosion protection have been studied in this work, with the emphasis placed on rockfill covering. The need for and the dimensioning of this type of covering has been examined in literature and field studies.

Kulturfrämjande arbete i förskolan : Sex pedagogers syn på hur de arbetar med barnens olika kulturella bakgrunder

The purpose of this study has been to examine what approach and experience pedagogues at pre-schools, with a limited amount of nationalities, have regarding cultural promoting work in pre-schools. The concept ?cultural promoting? mainly regards the children's cultural backgrounds. The first question formulation focussed on the what the concepts ?cultural promoting? and ?cultural diversity? meant to the pedagogues.

Traditionell ekologisk kunskap i en framtid med lokala, självförsörjande och urbana samhällen

Several scenarios point toward a future where we are far more people on Earth than today, where most of those people will live in cities and where oil no longer dominates in the transport systems and in agriculture as an energy source and where less energy will be available to us. The report investigates what areas in traditional ecological knowledge that can contribute to the transition that follows a future with less energy and establishes three areas with the potential of becoming important: areaspecific biological knowledge in societies that are more dependent upon its surrounding environment and its natural prerequisitesthe local management of these biological resources, which often means a fair sharing and sustainable handling of the resources and which has been observed in Nobel price awarded Elinor Ostrom?s researchthe world views that lie behind how the environment is considered and managed, world views that can inspire and point toward how we in the future should formulate world views that do not give the destructive modern management of the environment It is also noted that the magnitude of the city living in the future is a historical news and that very little research has been done in how traditional knowledge can be transferred into this kind of living..

Indirekta effekter på marklavars abundans och diversitet vid ökad kvävehalt i marken : en jämförelse mellan opåverkad och lågintensivt brukad mark

Lichens are adapted to bright and sparse forests on oligotrophic ground. Due to a slow growth rate and high light demand lichens will suffer from competition in eutrophic environments. Therefore, lichens have disappeared from managed forests where the forest industry has increased the productivity. A reduced abundance of lichens will affect both biodiversity of the forest and the reindeer winter graze lands. It is important to understand how and for how long fertilization affects the abundance and diversity of lichens in order to protect lichen rich ecosystems. We have registered the biomass and number of lichen species in eight plots (four nitrogen rich and four nitrogen deficient) and compared fertilized Sami settlements with their oligotrophic surroundings in the nature reserves of Tjeggelvas.

Tungmetallers påverkan på bottenfaunans artsammansättning i sjön Tisken

The purpose of this study was to investigate how elevated levels of heavy metals affect the faunal species composition, abundance and species-diversity. The bentic macroinvertebrate fauna in the highly polluted lake Tisken was compared with the bentic macroinvertebrate fauna in the unpolluted lake Varpan. Mine wastes account for most of the metal that is discharged into Tisken. The hypotheses was that the heavy metal pollutions in lake Tisken influenced the species composition, abundance and diversity of the macroinvertebrates. Twenty samples were taken in both sites.

BIODIVERSITETS P?VERKAN P? M?NGDEN ORGANISKT MATERIAL I ALSUMPSKOG: En fallstudie i fyra alsumpskogar p? svenska v?stkusten

Globally, coastal ecosystems like mangrove forests, sea grass meadows and salt marshes are well known for their ability to capture and store atmospheric carbon effectively. In Sweden, there is still limited knowledge about local coastal ecosystems with similar functions, with alder swamp forests being an interesting example. Therefore, this study aimed to increase knowledge of the factors that can contribute to the potential carbon sequestering ability of alder swamps. Vegetation data and sediment samples were collected from a total of 37 sampling plots across four alder swamps in Bohusl?n on the Swedish west coast.

En kulturhistorisk undersökning av minneslunden på Stola herrgård ? förslag till en underhållningsplan

Uppsats för avläggande av filosofie kandidatexamen iKulturvård, Trädgårdens hantverk och design22,5 hp, 2014.

<- Föregående sida 10 Nästa sida ->