Sökning: "seasonality"

Visar resultat 1 - 5 av 64 avhandlingar innehållade ordet seasonality.

  1. 1. Suicide Seasonality Theoretical and Clinical Implications

    Detta är en avhandling från Uppsala : Acta Universitatis Upsaliensis

    Författare :Georgios Makris; Uppsala universitet.; [2017]
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; suicide; season; antidepressants; sunshine; temperature; Psychiatry; Psykiatri;

    Sammanfattning : Background: Although suicide seasonality has been well-documented, surprisingly little is known about its underlying mechanisms.Methods: In this thesis, data from three Swedish registers (Cause of Death Register, National Patient Register, Prescribed Drugs Register) and data from the Swedish Meteorological and Hydrological Institute were used. LÄS MER

  2. 2. Water Quality in Swedish Lakes and Watercourses Modeling the Intra-Annual Variability

    Detta är en avhandling från Uppsala : Acta Universitatis Upsaliensis

    Författare :Julia Hytteborn; Uppsala universitet.; [2014]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Total organic carbon; cyanobacteria; seasonality; water quality modeling; climate change; surface water; Earth Science with specialization in Environmental Analysis; Geovetenskap med inriktning mot miljöanalys;

    Sammanfattning : Water quality is of great importance for ecosystems and society. This thesis characterized and modeled the variation in several key constituents of Swedish surface waters, with particular consideration given to intra-annual variability and sensitivity to climate change. LÄS MER

  3. 3. AVHRR NDVI for monitoring and mapping of vegetation and drought in East African environments

    Detta är en avhandling från Lund University Press

    Författare :Lars Eklundh; Lunds universitet.; Lund University.; [1996]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Geologi; fysisk geografi; physical geography; Geology; phenology; seasonality; Fourier series; geostatistics; signal-to-noise ratio;

    Sammanfattning : Popular Abstract in Swedish Data från AVHRR-sensorn ombord på NOAA satelliten används operationellt för att övervaka vegetation och torka i global och regional skala. Ett vegetationsindex (NDVI) används som en indikator på grön växtbiomassa. LÄS MER

  4. 4. Food insecurity and coping strategies in semiarid areas the case of Mvumi in central Tanzania

    Detta är en avhandling från Stockholm : Almqvist & Wiksell International

    Författare :Emma T. Liwenga; Stockholms universitet.; Stockholms universitet.; [2003]
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Food insecurity; semiarid; local knowledge; seasonality; coping strategies; livelihood strategies.; SOCIAL SCIENCES Business and economics Human geography; economic geography Human geography; SAMHÄLLSVETENSKAP Ekonomi Kulturgeografi; ekonomisk geografi Kulturgeografi; Human Geography; kulturgeografi;

    Sammanfattning : This study examines how people in dryland areas cope with food insecurity and adversities over time. It draws from the experience of the Gogo people living in Mvumi in the semiarid zone of central Tanzania, an area with a long history of food shortages. The study specifically examines the potential for dryland resources to sustain livelihoods. LÄS MER

  5. 5. Predictions Within and Across Aquatic Systems using Statistical Methods and Models

    Detta är en avhandling från Uppsala : Acta Universitatis Upsaliensis

    Författare :Peter H. Dimberg; Uppsala universitet.; [2015]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Lake; Water quality; Chlorophyll-a; Total phosphorus; Seasonality; Morphometry; Regression model; Probability; Markov chain; Genetic programming; Temporal-trend; Earth Science with specialization in Environmental Analysis; Geovetenskap med inriktning mot miljöanalys;

    Sammanfattning : Aquatic ecosystems are an essential source for life and, in many regions, are exploited to a degree which deteriorates their ecological status. Today, more than 50 % of the European lakes suffer from an ecological status which is unsatisfactory. LÄS MER