Sökning: "Per Widén"

Visar resultat 6 - 10 av 17 avhandlingar innehållade orden Per Widén.

  1. 6. The use of highway crossings to maintain landscape connectivity for moose and roe deer

    Författare :Mattias Olsson; Per Widén; Anthony Clevenger; Karlstads universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; wildlife crossings; Barrier effect; habitat selection; ecoduct; moose; roe deer; connectivity; conservation; overpass; underpass; highway; exclusion fencing; Biology; Biologi; Biology; Biologi;

    Sammanfattning : Increasingly wildlife managers and land managers are challenged to maintain the viability and connectivity among large mammal populations. Thus, it is important that effective highway crossings are identified and optimized with respect to construction cost, facilitation of ungulate movements, and ability to reduce wildlife-vehicle collisions. LÄS MER

  3. 7. Always on the wing - Fluid dynamics, flight performance and flight behavior of common swifts

    Författare :Per Henningsson; Biologiska institutionen; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Apus apus; aerodynamics; animal flight; kinematics; vortex wake; digital particle image velocimetry; DPIV; common swift; tracking radar; wind tunnel; migration; roosting flight;

    Sammanfattning : The aerodynamics and kinematics behind the flight of animals are relatively unknown. Although animal flight has been studied for several hundreds of years, it is only in recent time that we have the technical abilities to study the mechanistic basis of animal flight. LÄS MER

  4. 8. Spridning och ekonomiska effekter av medicinsk teknologi vid behandling av magsår, prostataförstoring och gallsten

    Författare :Per Carlsson; Linköpings universitet; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Technology assessment; Economic evaluation; Diffusion of medical technology; Peptic Ulcer; Prostatic Hyperplasia; Gallstone disease; INTERDISCIPLINARY RESEARCH AREAS; TVÄRVETENSKAPLIGA FORSKNINGSOMRÅDEN;

    Sammanfattning : The general aim of the study is to analyse the economic consequences of diffusion and changed utilization of medical technology. The intention is to widen the empirical basis prospects for assessing the future consequences of technologies other than those studied within the scope of this project. LÄS MER

  5. 9. Environmental-flow assessments for current and future run-off in a large river system regulated for hydropower production

    Författare :Åsa Widén; Roland Jansson; Birgitta Malm-Renöfält; Michael McClain; Umeå universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Environmental flows; eco-hydrology; hydropower; river ecosystem; environmental benefits; climate change; collaboration; resource management; Ekologisk reglering; vattenkraft; produktionsoptimering; hydrologi; hydraulik; akvatiskt ekosystem; miljönytta; klimatförändringar; samverkan; vattenresurs management;

    Sammanfattning : In 2019, Sweden implemented legislative changes to renegotiate hydropower permits to both consider environmental rehabilitation and to ensure national supply of hydropower. This means that efforts for environmental rehabilitation of the 2,000 hydropower plants in Sweden need to be considered. LÄS MER

  7. 10. Development and evaluation of rehabilitation at home after stroke in south-west Stockholm

    Författare :Lotta Widén Holmqvist; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :;

    Sammanfattning : In Sweden (population 8.8 million) the great majority of patients with acute stroke are admitted to hospital. Each year 10 000-12 000 patients develop persistent disability. LÄS MER