Search for dissertations about: "Torbjörn Johansson"

Showing result 1 - 5 of 10 swedish dissertations containing the words Torbjörn Johansson.

2. 1. Phosphorus Emissions from Fish Farms : Observed and Predicted Effects

   Author : Torbjörn Johansson; Kurt Pettersson; Uppsala universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Earth sciences; Fish farm; phosphorus; eutrophication; model; Geovetenskap; Earth sciences; Geovetenskap; Sedimentology; sedimentologi;

   Abstract : During the last decades, fish farming has been a rapidly increasing industry in many European and North American countries. Sweden has a large potential for aquaculture, but there is also a strong concern about the effects on the environment that an increased aquaculture production may cause. READ MORE

4. 2. Temporal and spatial variability of carbon cycling in a subarctic landscape

   Author : Torbjörn Johansson; Institutionen för naturgeografi och ekosystemvetenskap; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Geologi; physical geography; Geology; Växtekologi; Plant ecology; Permafrost; Herbivory; Subarctic; Aerial photography; Vegetation change; Carbon balance; fysisk geografi;

   Abstract : This thesis deals with the carbon balance in a subarctic landscape at different temporal and spatial scales. Its focus is mainly on the peatland and mountain birch forest (Betula pubescens ssp. czerepanovii) ecosystems within the Abisko area in northernmost Sweden. This is an area with a temperature close to the 0 OC mean annual isotherm. READ MORE

5. 3. Complementary feeding based on Nordic foods : effects on nutrient intake, growth, biomarkers and eating behavior

   Author : Ulrica Johansson; Torbjörn Lind; Inger Öhlund; Lene Lindberg; Anna Winkvist; Umeå universitet; []
   Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Infant feeding; healthy diet; food preference; complementary feeding; eating behavior; repeated exposure; vegetables; fruit; Nordic diet; sustainable diet; nutrition; roots; berries; flavor learning; pediatrik; Pediatrics; Medicine; medicin; Nutrition; näringslära; Public health; folkhälsa;

   Abstract : Background: Early nutrition is fundamental to growth and development. Infants develop long lasting food preferences very early in life from food exposures when the brain is impressionable and sensory pathways are receptive. READ MORE

6. 4. Stress steroids as accelerators of Alzheimer's disease. : Effects of chronically elevated levels of allopregnanolone in transgenic AD models

   Author : Sara Bengtsson; Mingde Wang; Torbjörn Bäckström; Maja Johansson; Caroline Graff; Umeå universitet; []
   Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Allopregnanolone; Alzheimer s disease; beta-amyloid; synaptophysin; chronic stress; Morris water maze; obstetrik och gynekologi; Obstetrics and Gynaecology; medicinsk farmakologi; Medical Pharmacology; Neurology; neurologi; Geriatrics; geriatrik; medical behavioral science; medicinsk beteendevetenskap;

   Abstract : Background Alzheimer’s disease (AD) and dementia are devastating con­ditions not only for the affected patients but also for their families.  The economical costs for the society are tremendous. READ MORE

7. 5. Inverse Problems for Tumour Growth Models and Neural ODEs

   Author : Rym Jaroudi; George Baravdish; Tomas Johansson; Jonas Unger; Gabriel Eilertsen; Lukáš Malý; Torbjörn Lundh; Linköpings universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES;

   Abstract : This thesis concerns the application of methods and techniques from the theory of inverse problems and differential equations to study models arising in the areas of mathematical oncology and deep learning. The first problem studied is to develop methods to perform numerical simulations with full 3-dimensional brain imaging data of reaction-diffusion models for tumour growth forwards as well as backwards in time with the goal of enabling the numerical reconstruction of the source of the tumour given an image (or similar data) at a later stage in time of the tumour. READ MORE