Diurnal and Annual Variations in Overland Radio-Transmission
نویسندگان
چکیده
منابع مشابه
Primary angioplasty and diurnal variations.
Rev Esp Cardiol. 2009;62(6):704-12 709 rhythmic variations.2 It has been clearly demonstrated that the beginning of an acute myocardial infarction most frequently occurs in the early hours of the morning, which has raised our interest in finding out what causes explain this circadian pattern, and what their clinical and therapeutic implications are.2 Secondly, various studies have provided data...
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The heart is challenged by a plethora of extracellular stimuli over the course of a normal day, each of which distinctly influences myocardial contractile function. It is therefore not surprising that myocardial metabolism also oscillates in a time-of-day dependent manner. What is becoming increasingly apparent is that the heart exhibits diurnal variations in its intrinsic properties, including...
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The concentration of lipids in the blood of animals and man is commonly considered to be a labile value which is affected markedly by the ingestion of food. This belief is reflected in the usual practice of securing samples of blood for comparative lipid studies with the subject in a fasting state. The same belief underlies the insistence on blood obtained during fasting in performing other ana...
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Meteors are an important source for (a) the metal atoms of the upper atmosphere metal layers and (b) for condensation nuclei, the existence of which are a prerequisite for the formation of noctilucent cloud particles in the polar mesopause region. For a better understanding of these phenomena, it would be helpful to know accurately the annual and diurnal variations of meteor rates. So far, thes...
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ژورنال
عنوان ژورنال: Physical Review
سال: 1914
ISSN: 0031-899X
DOI: 10.1103/physrev.4.435