Sökning: "aerial photos"

Visar resultat 1 - 5 av 7 avhandlingar innehållade orden aerial photos.

  1. 1. Flygbildstolkning av vegetation : metodstudier för översiktlig kartering

    Författare :Margareta Ihse; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Flygfotografi;

    Sammanfattning : Investigations of the possibilities of producing medium scale survey maps of the vegetation cover by the interpretation of aerial photographs started at the Department of Physical Geograhy, University of Stockholm, in 1973. The aim was to produce vegetation maps more easily and more rapidly than by standard field methods. LÄS MER

  3. 2. A bird's eye-view of smallholder productivity : Current measurement shortfalls, farmer perceptions and rationality on rainfed family farms in Ghana

    Författare :Ibrahim Wahab; Institutionen för kulturgeografi och ekonomisk geografi; []
    Nyckelord :LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES; Smallholder productivity; measurement shortfalls; maize yield levels; aerial photos; farmer attitudes; Ghana;

    Sammanfattning : Smallholder farming, which is largely rainfed and relies on mostly rudimentary tools, predominates Ghana’s agricultural sector. The sector’s importance to the national economy is exemplified in not only the proportion of the active national labour force engaged in it but also in terms of its export earnings and service as a source of food for the vast majority of the population. LÄS MER

  4. 3. Essays in Applied Microeconomics

    Författare :Erik Grenestam; Centrum för ekonomisk demografi; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Household; Neighborhood; ; Peer effect; Machine learning; Portfolio choice; Wealth; Children; Fertility; Consumption; Evaluation; Nutrient runoff; Water quality; Education; Broadband; Internet; Peer effect; Machine learning; portfolio choice; Wealth; Children; Fertility; Consumption; Evaluation; Nutrient runoff; Water quality; Education; Broadband; Internet;

    Sammanfattning : This thesis consists of four self-contained papers in applied microeconomics. The first paper asks how a neighbors purchase of a specific good affects a households likelihood of purchase. LÄS MER

  5. 4. How has time and space affected plant biodiversity in the Hjälmö-Lådna archipelago?

    Författare :Josefin Reimark; Sara Cousins; Regina Lindborg; Urban Emanuelsson; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Physical Geography; naturgeografi;

    Sammanfattning : Traditionally European farmland management has declined during the last century, mainlydue to abandonment or intensification. When traditional management is replaced by newmethods many species are negatively affected and often threatened with extinction. LÄS MER

  7. 5. Spatial and temporal population dynamics in the mountain tundra – mesopredator and prey

    Författare :Rasmus Erlandsson; Anders Angerbjörn; Dennis Murray; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; population dynamics; cyclic; mountain tundra; arctic fox; Norwegian lemming; small rodents; mesopredator; predation; survival; reproduction; zoologisk ekologi; Animal Ecology;

    Sammanfattning : It is well known that competition, predation and fluctuating food resources can have strong effect on individual fitness and population dynamics. The complexity of natural systems can make it complicate to disentangle those processes, but environments with relatively simple food webs, and strong cyclic population dynamics offer contrasting conditions resembling experimental treatments. LÄS MER