نتایج جستجو برای: شاخص rdi
تعداد نتایج: 75136 فیلتر نتایج به سال:
خشکسالی پدیدهای است طبیعی که فراوانی آن در مناطق خشک و نیمه خشک ایران، بویژه و استان فارس بسیار زیاد است. ارزیابی و پایش خشکسالی از نیازهای اساسی برنامهریزیهای مدیریت کشاورزی و منابع آب برای کاهش اثرات آن بهشمار میروند. بدین منظور، استفاده از شاخصهای خشکسالی پیشنهاد میشود. از جمله شاخصهای مزبور میتوان به شاخصشناسایی خشکسالی (RDI) اشاره نمود. در این تحقیق، دورهی بازگشت خشکسالی کشاورزی گن...
Abstract High-contrast imaging presents us with the opportunity to study circumstellar disks and planets still embedded within them, providing key insights into formation evolution of planetary systems. However, postprocessing techniques that are often needed suppress stellar halo light typically result in significant variable loss light, even when using relatively conservative approaches like ...
BACKGROUND Previous studies have often investigated the association of obstructive sleep apnea (OSA) with cardiovascular morbidity and mortality, but the possibility of reverse causation has not been clearly defined. OBJECTIVE To examine if the presence of any of the cardiovascular-related diseases, including hypertension, diabetes mellitus, coronary artery disease, and/or cerebrovascular di...
SUBJECT OBJECTIVE To assess the accuracy of a portable monitoring device based on peripheral arterial tonometry to diagnose obstructive sleep apnea (OSA). To propose a new standard for limited-channel device validation using synchronized polysomnography (PSG) home recordings and a population-based cohort. DESIGN Single-night, unattended PSG and Watch_PAT 100 (WP_100). SETTING Home environme...
BACKGROUND Sleep-disordered breathing (SDB) is associated with adverse outcomes in patients with chronic heart failure (CHF). Additionally, heart rate turbulence (HRT) reflects changes in the sinus cycle length of baroreceptor in response to hemodynamic fluctuations after ventricular premature beat. Recent studies have suggested that HRT as a marker of vagal activity has a predictive value of p...
Epidemiologic literature suggests that persons with clinically diagnosed sleep apnoea frequently have impaired cognitive function, but whether milder degrees of sleep-disordered breathing (SDB) are associated with cognitive dysfunction in the general population is largely unknown. Approximately 1700 subjects free of clinically diagnosed SDB underwent at-home polysomnography (PSG) as part of the...
A simple screening method for sleep-disordered breathing (SDB) is desirable for primary care practices. In the present study, a simple monitor, which utilises a new type of flow sensor and a novel algorithm, was prospectively validated. Home recording for 2 nights with the monitor only, followed by in-laboratory recording with the monitor together with polysomnography, were carried out in conse...
BACKGROUND Sleep-disordered breathing (SDB) is critically associated with cardiovascular mortality and morbidity, especially in patients with heart failure (HF). However, the majority of SDB patients remain undiagnosed. In contrast, abnormality in heart rate variability has been reported in patients with SDB. To explore an efficient electrocardiogram (ECG)-based screening tool for SDB, we exami...
Fruit yield and root system distribution of ‘Tommy Atkins’ mango under different irrigation regimes1
This study aimed to evaluate the fruit yield and the distribution of ‘Tommy Atkins’ mango root system under different irrigation regimes in the semiarid region of Bahia. The experimental design was completely randomized with five treatments and three replicates: 1 Irrigation supplying 100% of ETc in phases I, II and III; 2 Regulated deficit irrigation (RDI) supplying 50% of ETc in phase I (begi...
BACKGROUND Obstructive sleep apnea (OSA) is characterized by a repetitive collapse of the upper airway during sleep and may affect as many as 1 in 5 adults. Although OSA appears to increase risk for metabolic syndrome in middle-aged adults, no data currently exist in a younger, preclinical cohort. METHODS Forty-five sedentary young men: 12 overweight with OSA (OSA), 18 overweight without OSA ...
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