Sökning: "seasonality"

Visar resultat 1 - 5 av 52 avhandlingar innehållade ordet seasonality.

  1. 1. On seasonality and cointegration

    Detta är en avhandling från Stockholm : Economic Research Institute, Stockholm School of Economics (Ekonomiska forskningsinstitutet vid Handelshögsk.) (EFI)

    Författare :Mårten Löf; Handelshögskolan i Stockholm.; [2001]
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Seasonal cointegration; Periodic cointegration; Seasonality; Forecasting; SOCIAL SCIENCES Business and economics Economics; SAMHÄLLSVETENSKAP Ekonomi Nationalekonomi;

    Sammanfattning : This thesis, which consists of four essays, focus on seasonal and periodic cointegration models. These models are tools to describe changing seasonality.Essay 1 "Forecasting performance of seasonal cointegration models", with Johan Lyhagen. 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; Geovetenskap med inriktning mot miljöanalys; Earth Science with specialization in Environmental Analysis;

    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; fysisk geografi; Geologi; physical geography; Geology; phenology; seasonality; Fourier series; geostatistics; signal-to-noise ratio;

    Sammanfattning : In this thesis, an assessment is made of the performance of the Normalized Difference Vegetation Index (NDVI) derived from coarse resolution data from the NOAA AVHRR sensor, with particular reference to mapping and monitoring of drought and vegetation in East African vegetation and climatic conditions. Methods for analysing time series of satellite data are investigated. 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; Geovetenskap med inriktning mot miljöanalys; Earth Science with specialization in Environmental Analysis;

    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