نتایج جستجو برای: opportunistic
تعداد نتایج: 20666 فیلتر نتایج به سال:
BACKGROUND Various centralised mammography screening programmes have shown to reduce breast cancer mortality at reasonable costs. However, mammography screening is not necessarily cost-effective in every situation. Opportunistic screening, the predominant screening modality in several European countries, may under certain circumstances be a cost-effective alternative. In this study, we compared...
For nearly two years, the world has been facing a common crisis as Covid-19. In the meantime, governments have suffered a wide variety of damages and costs, and damage to human capital and the loss of health professionals is one of the irreparable costs of health systems in all governments. During this crisis, health care systems and specialists were exposed to special occupational hazards over...
Introduction : The decreased level of immunity in Human Immunodeficiency Virus (HIV) infected patients increases their vulnerability to various opportunistic fungal infections. Oral candidiasis has been found to be the most common fungal infection among HIV infected patients. The present study was conducted to evaluate the spectrum of various opportunistic fungal infections and their correlat...
The performance of opportunistic beamforming might be degraded if the number of users is small. This paper proposes an adaptive opportunistic beamforming technique for orthogonal frequency division multiple access systems, which can produce good results even with a small number of users. This paper also proposes a modified proportional fairness scheduling algorithm, which can further improve th...
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