Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 574 for “"seasonality"”.
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Suicide Seasonality In South Carolina
… extensive research, inferences on suicide seasonality are weak. The suicide seasonality in South Carolina has been described in our study. Suicides in our sample were found to exhibit seasonal variation. Although the seasonality was different across gender, race, and age group, it was not …
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THE SEASONALITY OF PATHOLOGY: A SOCIOLOGICAL ANALYSIS
<p>This study looks at the seasonal periodicity of a number of different social pathologies, including suicide, mortality resulting from disease, the onset of physical illness, and criminal behavior. Using time-series data from the United States, for 132 consecutive months between 1965-1975, it is …
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Modelling seasonality in South African agricultural futures
This study investigates the seasonality in agricultural commodity futures prices. Futures prices are modelled using the model developed by Sørensen (2002). The model defines the commodity spot price as the sum of a nonstationary state variable, a stationary state variable and a deterministic …
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Seasonality, latitudinal dependence and structural evolution of arctic cyclones
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2023-09-01 without embargo terms
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Floods in Germany : analyses of trends, seasonality and circulation patterns
… most of Germany for the period 1951–2002. The seasonality and trend pattern of eight flood indicators, such as maximum series and peak-over-threshold series, are analyzed in a spatially-explicit manner. Analyses are performed on different spatial scales: at the local scale, through …
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Seasonality in commercial real estate transaction volume and capital returns
In this thesis I examine the existence of seasonality in quarterly transaction volume and capital returns in commercial real estate markets from 1984 to 2005, based on MIT's Transaction-Based Index. Evidence is provided that (1) transaction volume distributions in fourth quarter and capital returns …
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Returns around Earnings Announcements for Companies with Seasonality in Earnings
… around earnings announcements for companies with seasonality in earnings. Earnrank is used as a measure of seasonality where earnrank for a company is calculated quarterly by taking last five years of earnings data, ranking them and taking the average of the ranks for the respective quarter. For …
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Implications of seasonality and asymmetry for ENSO’s predictability and future changes
… investigates aspects of two ENSO features – seasonality and asymmetry – whose projected changes haven’t been well-studied, despite their prominence in observations. First, we evaluate an alternative framework – based on the Koopman operator – for representing asymmetry and seasonality in a …
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Modeling, Dynamics and Optimal Control of West Nile Virus with Seasonality
West Nile virus (WNv) is a mosquito-borne disease which arrived in Canada in 2001. It has kept spreading across the country and still remains a threat to public health. In this dissertation, we formulate dynamical models and apply theory of dynamical systems to investigate the behavior of the …
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Accruals quality, stock returns seasonality and the cost of equity capital
… low-priced stocks is essential when testing the seasonality of AQ pricing, as the biased returns of low-priced stocks are likely to be systematically related to the tax-loss selling effect. Consequently, I re-examine seasonality in the pricing of AQ and find that (1) for samples excluding …
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Accruals quality, stock returns seasonality and the cost of equity capital
… low-priced stocks is essential when testing the seasonality of AQ pricing, as the biased returns of low-priced stocks are likely to be systematically related to the tax-loss selling effect. Consequently, I re-examine seasonality in the pricing of AQ and find that (1) for samples excluding …
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Seasonality and trade-offs in equatorial rufous-collared sparrows (Zonotrichia capensis)
… existing in an environment with low temperature seasonality. However, there is a strong research bias towards temperate-zone studies of seasonality. I investigated the timing of life history stages and trade-offs in tropical rufous-collared sparrows (Zonotrichia capensis) in the humid Andes of …
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Seasonality of circulation in southern Africa using the Kohonen self-organising map
… of the technique to highlight differences in seasonality between data sets. The SOM is found to be a robust technique for deducing the modes of variability of map patterns within a circulation data set, allowing variability to be expressed in terms of inter and intra-annual variability. The …
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Demand forecasting at Zara : a look at seasonality, product lifecycle and cannibalization
… thesis sets out to incorporate the effects from seasonality, product lifecycle, and cannibalization into a long term aggregate demand forecast and a short term SKU replenishment forecast. For seasonality, there are two categories of events that are explored in detail: 1) Macro patterns, which are …
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NON-STATIONARY MULTIARMED BANDITS FOR SATIATION AND SEASONALITY PHENOMENA IN MUSIC RECOMMENDER SYSTEMS
… handles contrasting phenomena like satiation and seasonality in a unified framework. We formalize this model, called \textit{Last Switch Dependent Bandit}, as a non-stationary multiarmed bandit where the expected reward of an arm is determined by its state, which indicates the time elapsed since …
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Clams and climate: implications for measuring seasonality in the marine bivalve, saxidomus gigantea
… the length of its growing seasons. To measure seasonality, a total of 25 modern samples were collected from Alaska and British Columbia and the number of circalunidian growth lines were counted between annual winter growth lines confirmed by oxygen isotope analysis. Clams collected from Alaska …
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Distribution, Relative Abundance, and Reproductive Seasonality of Larval Fish in the Red River
<p>Spawning habitat availability and reproductive timing are crucial factors that affect survival of larval fish. To understand temporal and spatial variation in larval fishes in the Red River, samples were collected from the Red River and North Dakota tributaries using ichthyoplankton nets. …
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Comparison of Time Series and Functional Data Analysis for the Study of Seasonality.
… analysis has well known methods for the study of seasonality. A more recent method of functional data analysis has proposed phase-plane plots for the representation of each year of a time series. However, the study of seasonality within functional data analysis has not been explored extensively. …
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Quantifying the effect of climate on respiratory viruses: From seasonality to interannual variability
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2023-09-01 without embargo terms
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