نتایج جستجو برای: ecological disturbances

تعداد نتایج: 146768  

Journal: :iranian journal of toxicology 0
محمد عارفی mohammad arefi department of forensic medicine and clinical toxicology, tehran university of medical sciences, tehran, iran بهنام بهنوش behnam behnoush department of forensic medicine and clinical toxicology, tehran university of medical sciences, tehran, iran مهدی لاله زاری mehdi lalezari department of forensic medicine and clinical toxicology, tehran university of medical sciences, tehran, iran نسیم زمانی nasim zamani department of forensic medicine and clinical toxicology, tehran university of medical sciences, tehran, iran

background: the aim of this study was to evaluate the efficacy of arterial blood gases (abgs) in determining the type of intoxication. methods: medical charts of all patients who had referred to the toxicology ward of baharloo hospital between january 2009 and december 2009 were evaluated. after excluding the patients with multi-drug toxicity, data, including age, sex, type of intoxication (the...

Journal: :journal of sleep sciences 0
mahmood vakili department of community medicine, school of medicine, shahid sadoughi university of medical sciences, yazd, iran mozhgan modaressi department of community medicine, school of medicine, shahid sadoughi university of medical sciences, yazd, iran maasomah rezvani school of medicine, shahid sadoughi university of medical sciences, yazd, iran arezoo aghakoochak health monitoring research center, shahid sadoughi university of medical sciences, yazd, iran

background and objective : poor sleep, poor quality of sleep and sleepiness are among the common problems as-sociated with learning, memory and educational performance in children and adolescents. considering the lack of pre-vious literature in this field, especially in the city of yazd, iran, a number of high-school students of the city participat-ed in a study to assess sleep problems and inf...

Quantifying land use/land cover changes is essential to monitor and assess the ecological consequences of human disturbances. Ecological condition and water quality of wetlands are highly related to the landscape characteristics, including land use/land cover (LULC) types and their fractions in the upland and the surrounding landscape. The changing characteristics of LULC in Shadegan Internatio...

2011
Jan Verbesselt Achim Zeileis Martin Herold

Near real-time monitoring of ecosystem disturbances is critical for addressing impacts on carbon dynamics, biodiversity, and socio-ecological processes. Satellite remote sensing enables cost-effective and accurate monitoring at frequent time steps over large areas. Yet, generic methods to detect disturbances within newly captured satellite images are lacking. We propose a generic time series ba...

C. Ganduri D.F. Millie G.L. Fahnenstiel G.R. Weckman M. Rangwala M. Rinder W. Young

Phytoplankton biomass within the Saginaw Bay ecosystem (Lake Huron, Michigan, USA) was characterized as a function of select physical/chemical indicators. The complexity and variability of ecological systems typically make it difficult to model the influences of anthropogenic stressors and/or natural disturbances. Here, Artificial Neural Networks (ANNs) were developed to model chlorophyll a con...

Journal: :Biopsychosocial Medicine 2008
Kazuhiro Yoshiuchi Yoshiharu Yamamoto Akira Akabayashi

Many physical diseases have been reported to be associated with psychosocial factors. In these diseases, assessment relies mainly on subjective symptoms in natural settings. Therefore, it is important to assess symptoms and/or relationships between psychosocial factors and symptoms in natural settings. Symptoms are usually assessed by self-report when patients visit their doctors. However, self...

Journal: :Statistics in medicine 2012
Donald Hedeker Robin J Mermelstein Hakan Demirtas

Ecological momentary assessment and/or experience sampling methods are increasingly used in health studies to study subjective experiences within changing environmental contexts. In these studies, up to 30 or 40 observations are often obtained for each subject. Because there are so many measurements per subject, one can characterize a subject's mean and variance and can specify models for both....

2017
Stephanie D. Jurburg Inês Nunes James C. Stegen Xavier Le Roux Anders Priemé Søren J. Sørensen Joana Falcão Salles

The response of bacterial communities to environmental change may affect local to global nutrient cycles. However the dynamics of these communities following disturbance are poorly understood, given that they are often evaluated over macro-ecological time scales and end-point measurements. In order to understand the successional trajectory of soil bacterial communities following disturbances an...

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