Results 11 to 20 of about 143,683 (316)

Seasonality of coitus and seasonality of birth [PDF]

open access: yesDemography, 1967
Resumen En todas las poblaciones estudiadas se ha observado quehay una variación estacional en la tasade natalidad. Se han adelantado muchas hipótesis para explicaresiavariación, incluyendo una variación estacional en lafrecuenciadel coiio, Se sabe que ésta relación es eierta para otros primates, peroen el hombre, no se ha documentado ...
J R, Udry, N M, Morris
openaire   +2 more sources

Seasonality, mediation and comparison (SMAC) methods to identify influences on lung function decline

open access: yesMethodsX, 2021
This study develops a comprehensive method to assess seasonal influences on a longitudinal marker and compare estimates between cohorts. The method extends existing approaches by (i) combining a sine-cosine model of seasonality with a specialized ...
Emrah Gecili   +11 more
doaj   +1 more source

EXPLORING PROFESSIONALS’ PERCEPTIONS OF TOURISM SEASONALITY AND SPORTS EVENTS: A QUALITATIVE STUDY OF KISSAVOS MARATHON RACE

open access: yesEnlightening Tourism: A Pathmaking Journal, 2022
Local tourism professionals entail those who strongly face the personal and financial difficulties of tourism seasonality. The main purpose of this paper is to examine the local tourism professionals’ perceptions of a small-scale sports event, which is ...
Sofia Gkarane   +2 more
doaj   +1 more source

Malaria seasonality and rainfall seasonality in Sri Lanka are correlated in space

open access: yesGeospatial Health, 2008
Correlation in space between seasonality of malaria and seasonality of rainfall was studied in Sri Lanka. A simple seasonality index was developed by making use of the bimodal seasonality of both malaria and rainfall.
Olivier J.T. Briët   +2 more
doaj   +1 more source

Orbital‐Insolation Controlled Porites Coral δ13C Seasonality Variations Since the Mid‐Holocene in the Northern South China Sea

open access: yesGeophysical Research Letters, 2023
Coral skeleton δ13C is a routinely measured indicator in modern insolation change research, but the knowledge of environmental and climatic signals recorded in its seasonality during geological time is sparse.
Hao Wang   +6 more
doaj   +1 more source

On the Role of Seasonal Intercepts in Seasonal Cointegration [PDF]

open access: yesOxford Bulletin of Economics and Statistics, 1999
In the paper we consider the role of seasonal intercepts in seasonal cointegration analysis. For the nonseasonal unit root, such intercepts can generate a stochastic trend with a drift common to all observations. For the seasonal unit roots, however, we show that unrestricted seasonal intercepts generate trends that are different across the seasons ...
Franses, Philip Hans, Kunst, Robert M.
openaire   +6 more sources

ECONOMICAL AND SOCIAL IMPACTS OF TOURISM SEASONALITY- AN APPLIED STUDY ON SHARM EL-SHEIKH [PDF]

open access: yesMaǧallaẗ Kulliyyaẗ Al-Sīyāḥaẗ wa Al-Fanādiq (Ǧāmiʿaẗ Al-Mansoura), 2018
Seasonality is a concept that is well studied and documented in the tourism literature. Seasonality causes the fluctuation in tourist and visitor numbers to a destination.
Soha Mohamed Abd Elwahab   +2 more
doaj   +1 more source

Seasonal Sleep Variations and Their Association With Meteorological Factors: A Japanese Population Study Using Large-Scale Body Acceleration Data

open access: yesFrontiers in Digital Health, 2021
Seasonal changes in meteorological factors [e.g., ambient temperature (Ta), humidity, and sunlight] could significantly influence a person's sleep, possibly resulting in the seasonality of sleep properties (timing and quality).
Li Li   +4 more
doaj   +1 more source

A cross-sectional study of factors affecting seasonality in bipolar disorder

open access: yesSouth African Journal of Psychiatry, 2014
Background. Researchers have evinced interest in the effect of seasonal variations on mood and behavioural patterns in affective disorders.  Objective.
Pankaj Kumar Mittal   +4 more
doaj   +1 more source

Contrasting patterns of litterfall seasonality and seasonal changes in litter decomposability in a tropical rainforest region [PDF]

open access: yesBiogeosciences, 2014
The seasonality of litter inputs in forests has important implications for understanding ecosystem processes and biogeochemical cycles. We quantified the drivers of seasonality in litterfall and leaf decomposability using plots throughout the Australian ...
S. A. Parsons   +3 more
doaj   +1 more source

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