1,720,991 research outputs found
Highway surveying with DGPS based on RTCM satellite corrections
No full textA number of texts involving GPS receivers in various kinematics settings were conducted to assess the perfomance of GPS support of highway surveys ..
Chronic obstructive pulmonary disease: brief review
No full textChronic obstructive pulmonary disease is characterized by airflow limitation that is not fully reversible and is usually both progressive and associated with an abnormal inflammatory response of the lungs to noxious particles or gases, particularly tobacco smoke. Diagnosis of chronic obstructive pulmonary disease is primarily based on a reduction of forced expiratory volume in one second/forced vital capacity ratio < 70% post-bronchodilators. The characteristic symptoms of chronic obstructive pulmonary disease are cough, sputum, and dyspnea upon exertion. Based on airflow limitation as measured by spirometry, chronic obstructive pulmonary disease can be classified as mild, moderate, severe and very severe. Chronic obstructive pulmonary disease can coexist with asthma, although the inflammation characteristic of chronic obstructive pulmonary disease is distinct from that of asthma
Vitamin D and health status in elderly.
No full textRecently, vitamin D has aroused considerable interest for several reasons. Many epidemiological studies have shown a widespread deficiency of vitamin D at all ages, and the recent finding that many organs and tissues have vitamin D receptors has fostered the clinical and biological relevance of vitamin D. Elderly people are at high risk for vitamin D deficiency if their life style entails few outdoor activities, their skin is thick and they exhibit impairment of renal function. In the elderly, vitamin D deficiency is very important because it can affect the function of many organs such as the muscle–skeletal, cardio-vascular systems and kidney, and may be involved in various diseases and pathological conditions includine type II diabetes, cancer and cognitive decline. In the present review, the most relevant features of vitamin D are described as well as the clinical consequences of hypovitaminosis D in the elderly. Finally, the role of an adeguate oral supplementation in the geriatric population is stressed. Biomarkers currently available show that vitamin D deficiency is a major public health problem in any part of the world, which requires urgent attention. Symposium: Vitamin D and Health in the 21st Century–update [1
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