BACKGROUND Seasonality of any infectious disease is important for its control and monitoring. While influenza seasonality in people has been evaluated extensively, this question has not been studied well in swine populations. OBJECTIVE The goal of this study was to investigate seasonality of influenza in swine, using diagnostic submissions to a diagnostic laboratory. METHODS Two thousand se...

The paper presents an analysis of the seasonality of Italian daily electricity prices. Since the correct detection of the nature, stochastic or probabilistic, of the seasonality is crucial in ARIMA modeling, a test that allows such detection is presented. The application of this test to the Italian daily prices in the years 2008-11 has pointed to the presence of deterministic seasonality in the...

Rogue seasonality or unintended cyclic variability in order and other supply chain variables is an endogenous disturbance generated by a company’s internal processes such as inventory and production control systems. The ability to automatically detect, diagnose and discriminate rogue seasonality from exogenous disturbances is of prime importance to decision makers. This paper compares the effec...

Background: The identification of differences in seasonality and chronotype may provide useful information regarding unipolar mania as a distinct entity. Therefore, the present study was planned to compare seasonality and chronotype in patients with unipolar mania and bipolar disorder. Method: A cross-sectional study included 60 euthymic outpatients, 30 affected by bipolar affective disorder (b...

The seasons are astronomical, astrological, meteorological, biological, and agricultural. From a perspective outside the biological sciences, the questions of interest about plant seasonality are linked to this wider context. In this review I try to see flowering time, as one important aspect of seasonality, from an outsider's point of view, and describe what is known about it in different type...

[1] VOC emissions from terrestrial ecosystems provide one of the principal controls over oxidative photochemistry in the lower atmosphere and the resulting air pollution. Such atmospheric processes have strong seasonal cycles. Although similar seasonal cycles in VOC emissions from terrestrial ecosystems have been reported, regional emissions inventories generally omit the effect of seasonality ...

This paper examines the relationship between seasonality, idiosyncratic risk and mutual fund returns using multifactor models. We use a large sample containing the return histories of 728 UK mutual funds over a 23-year period to measure fund performance. We present evidence that idiosyncratic risk cannot be eliminated, we also find evidence of seasonality in all fund categories. Specifically, w...

Ecological networks exhibit non-random structural patterns, such as modularity and nestedness, which determine ecosystem stability with species diversity and connectance. Such structure-stability relationships are well known. However, another important perspective is less well understood: the relationship between the environment and structure. Inspired by theoretical studies that suggest that n...

The investigation of the seasonality of a disease is an important objective in many epidemiological studies. Two statistical methods (Edwards' and Walter-Elwood methods) are described here to detect cyclic trends in time of birth of children diagnosed with acute lymphoblastic leukaemia (ALL) aged 0 4 year . We found evidence of seasonality related to month of birth with peaks in February and Au...

The relationship between the seasonality of ischaemic heart disease (IHD) mortality and temperature is explored for the purpose of evaluating the climate-based predictability of the magnitude and timing of the annual IHD mortality peak for 5 English counties. Seasonality is described by the amplitude (magnitude) and phase (timing) of the first harmonic of the annual cycle of IHD mortality and m...