Sökning: "top down"

Visar resultat 1 - 5 av 390 avhandlingar innehållade orden top down.

  1. 1. Top Quarks at the Tevatron : Measurements of the Top Quark Production and Decay with the D0 Experiment

    Författare :Jonas Strandberg; Barbro Åsman; Michael Albrow; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; elementary particle physics; D0; Tevatron; top quark; Physics; Fysik;

    Sammanfattning : This thesis presents two measurements of the top quark using 230 pb-1 of data taken with the D0 detector at the Tevatron accelerator. The first measurement determines the top pair production cross section at sqrt(s)=1.96 TeV in proton-antiproton collisions. LÄS MER

  3. 2. Bottom-up and top-down regulation of heterogeneous lake food webs

    Författare :Fernando Chaguaceda; Peter Eklöv; Kristin Scharnweber; Lars Tranvik; Blake Matthews; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; food webs; resource coupling; ontogenetic diet shifts; resource specialization; bottom-up; top-down; browning; eutrophication; lake; mesocosms; fatty acids; apparent competition; Biology with specialization in Limnology; Biologi med inriktning mot limnologi;

    Sammanfattning : Food webs are networks of organisms linked by trophic interactions that regulate the responses of ecosystems to environmental change. Such regulation is a result of the effects of resources on the abundance of their consumers (i.e. bottom-up effects) and/or the influence of consumers on the abundance of their resources (i. LÄS MER

  4. 3. Top-down Methodology to Identify Opportunities for Industrial Symbiosis Partnerships

    Författare :Joao Patricio; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Circular Economy; Top-down methods; Industrial Waste; Recycling; Material Inputs; Industrial Symbiosis;

    Sammanfattning : Industries in Europe are responsible for generating approximately 190 Mtons of waste; a figure which is expected to rise, as a significant increase in the consumption of raw materials is predicted to occur in the near future. This may lead to escalating environmental problems, including resource depletion, soil degradation, and climate change. LÄS MER

  5. 4. Top-down Fabrication Technologies for High Quality III-V Nanostructures

    Författare :Shagufta Naureen; Srinivasan Anand; Clivia M. Sotomayor Torres; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; III-V nanostructures; colloidal lithography; top-down fabrication; dry etching; quantum well; multilayer structures; nanowires; nanopillars; nanodisks; mono-layer etching; surface passivation; photoluminescence; carrier life time; total reflectivity; photonic crystals; nanomesh;

    Sammanfattning : III-V nanostructures have attracted substantial research effort due to their interesting physical properties and their applications in new generation of ultrafast and high efficiency nanoscale electronic and photonic components. The advances in nanofabrication methods including growth/synthesis have opened up new possibilities of realizing one dimensional (1D) nanostructures as building blocks of future nanoscale devices. LÄS MER

  7. 5. Att leda i kommunal äldreomsorg : Om arbetsledares handlingsutrymme, handlingsfrihet och skilda lojaliteter - exemplet Halland

    Författare :Ingrid Karlsson; Jan Petersson; Per Albinsson; Cecilia Henning; Växjö universitet; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; ledarskap; första linjens chef; vinjettstudie; top down; top up; konflikter; dilemman; äldreomsorg; handlingsutrymme; handlingsfrihet; lojalitet; sorti; organisationskultur; institutionalisering; formella och informella regler; Social work; Socialt arbete; Socialt arbete; Social Work;

    Sammanfattning : The middle management position in the care of the elderly is the focus of this licentiate dissertation. The aim was to develop knowledge about the constraints within which the middle manager is able to act and which freedom of action he/she has. LÄS MER