Filtyp
Gloss is considered one of the most important visual attributes of many foods, which is difficult to measure objectively. In this paper, a gloss imaging system (GIS) was implemented to evaluate the suitability of four indexes for measuring gloss from intensity images in flat and curved surfaces and to analyze gloss of some fruits and vegetables. Three indexes were computed from goniometric curves:
Fulltext är ej tillgänglig i elektronisk form. För lån/kopia av tryckt uppsats kontakta Medicinska fakultetens bibliotek, Lunds universitet
Latest research confirmed that plant matter can also produce a non negligible amount of the greenhouse gas methane under aerobic conditions. These findings have led to discussions and controversy within the research community. While KEPPLER ET AL. (2006) as one of the first researchers published results supporting this hypothesis others like DUECK ET AL. (2007) refuted these results within their e
The area around Lake Vänern in western Sweden is an exposed area for flooding. It has since the measurements started in the 1900th century been flooded repetitively. In the coming 100 years the water level is supposed to increase between 1-3 meters. This will most probably lead to worse and more regular floods in the area. There area around Lake Vänern is very densely populated and it will most pr
Coniferous as spruce (more specifically Norway spruce, Picea abies) and deciduous species like European beech (Fagus sylvatica) and oak (Quercus spp.) co exist in south Sweden. In perspective of climate change, species composition of Swedish forests is assumed to change. Observed climate on the period 1950-2010 prove that a general warming trend is occurring in southern Sweden, and that vegetation
Mediterranean regions have a growing number of extreme weather events due to rapid change of climate. Cork oak, which is located in the western Mediterranean area, has become a very valuable resource within the western Mediterranean forests. Therefore, assessment of the impacts of climate extremes upon cork oak can help us produce better forest management practices for coping with future climate c
Phenological observations of terrestrial ecosystems are useful in monitoring the changes in the local climate due to their relatively long time series and high temporal resolution. However performing field based phenological observations can be a labour intensive and time consuming process. Using satellite-based remotely sensed data can make the process much more efficient. Although the satellites
Extreme events are believed to become frequent, intense and long lasting with climate change. An example of such extreme event is the record breaking summer 2003 heat wave. The 2003 heat wave, accompanied by drought conditions, had severe impacts on the European terrestrial ecosystems. In this study we have used an ecosystem model LPJ-GUESS to investigate how the carbon balance of Europe was affec
The primary purpose of this study is to evaluate the size of impact that oil price shocks have on the stock market returns. The secondary purpose is to investigate which factors have greater influence on stock market returns in recent conditions in comparison to oil price shocks and to explore systematic effect across several countries.The study is carried out by applying unrestricted Vector Autor
The fieldwork was carried out on Bas Glacier d'Arolla during two days in August 1996. The aim of the study was to verify the existence of a relationship between turbulence and meander geometry according to the theory of Yalin (1992). Turbulence was measured by recording temperature fluctuations in one straight section and one curved section of the supraglacial stream. Temperature series was in
The objective of this study is to classify Swedish land cover classes using multisource satellite data. Multispectral Landsat TM data from April 1993, and multitemporal ERS-1 SAR data acquired seven times during the growing season of 1993 have been used. Nine agricultural and seven forest land cover classes have been analysed. The statistical separabilities between land cover classes have also bee
Water erosion on arable land has since the beginning of the 80's been studied frequently in Sweden because it to a high extent contributes to losses of nutrients from fields. This study discusses water erosion on arable land in a study area in southern Sweden, with an emphasis upon its relations to topographical factors, soils and land use. In the study area another investigation of water eros
An enhanced greenhouse effect could possibly result in frequency changes of extreme events. Observations of variations and changes in the frequency of extreme air pressure is an example of such events. Extreme air pressures are here defined as pressure lower than or equal to 990 hPa or higher than or equal to 1036 hPa. A gridded dataset from UKMO (United Kingdom Meteorological Office) with a spati
Söderslätt has been dominated by agriculture since many centuries ago. About 90 % of the area is cultural land nowadays. The aim of this paper is to quantify recent changes of ecological relevance in Söderslätt. Interpreted aerial photos from 1938 and 1985 were digitised and geometrical corrected for the change study. The agrarian development since the 1940s has meant a continuos change from small
The rapidly developing and widely distributed resin flow syndrom in Norway spruce (Picea abies) in southern Sweden has an unknown cause. One suggestion for its cause is the occurence of six "abnormally" mild winters from 1987/88 to 1992/93. This situation, together with hard spring frost is supposed to pose an unfavourable climatic combination for spruce. Daily temperature data (mean, ma
The main objective of this work was the evaluation of TM (Thematic Mapper) and MSS (Multi Spectral Scanner) data of Landsat 1 and 5 for a large scale forest damage assessment in the black triangle region. The area covers the Krusne Hory and neighboring mountain areas (border area of Germany, Poland and the Czech Republic. A temporal comparison of land use of 1975 and 1989 of a sub area and a class
A medium scale map of the vegetation-types and their distribution in the Kärkevagge valley, located in the northern Lapland has been made based on photo-interpretation of aerial infra-red colour photographs (scale l : 60 000). Following vegetation types have been identified: High altitude vegetation, two types of wind heaths: Dryas octopetala and Empetrum hermaphroditum respectively. Three main ty
In this study, physical properties of a small glacier in Kebnekaise Mountains, northern Sweden, are investigated in order to evaluate its erosionai capacity. By definition, glacial cirques are cut out by erosion by cirque glaciers. In areas characterized by low precipitation and pemafrost, small glaciers have very low erosional capacity. Is it possible that a small glacier can excavate a cirque fo
