منابع مشابه
Deep space missions and the issue of overcoming the problem of space radiation
As a member of the United Nations Committee on the Peaceful Uses of Outer Space (COPUOS), Iran has a long-term space exploration program. Space radiation is one of the challenges facing humans when they go outside Earth's protective atmosphere and magnetic field. Space is an environment that the cardinal principles of radiation protection i.e. time, distance and shielding cannot be effectively ...
متن کاملDeep Neck Space Infections: A Study of 76 Cases
Introduction: Deep neck space infections (DNSI) are serious diseases that involve several spaces in the neck. The common primary sources of DNSI are dental infections, tonsillar and salivary gland infections, malignancies, and foreign bodies. With widespread use of antibiotics, the prevalence of DNSI has been reduced. Common complications of DNSI include airway obstruction, jugular vein thrombo...
متن کاملDeep Space One: Nasa’s First Deep-space Teciinology Validation Mission
Under development for launch in July 1998, Deep Space One (IX 1 ) is the first flight of NASA’s New Millennium Program, chartered to validate selected technologies required for future low-cost space science programs. Advanced technologies chosen for validation on DS 1 include solar electric propulsion, high-power solar concentrator arrays, autonomous on-board optical navigation, two low-mass sc...
متن کاملWeight Management in Amateur Wrestling
CONTEXT Unhealthy weight loss practices continue to plague amateur wrestling. The National Collegiate Athletic Association weight loss guidelines are beneficial but have not solved the problem. EVIDENCE ACQUISITION All relevant databases through 2008 were searched using PubMed. The references of relevant articles were then searched for additional publications. STUDY TYPE Clinical review. ...
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ژورنال
عنوان ژورنال: Nature
سال: 2003
ISSN: 0028-0836,1476-4687
DOI: 10.1038/422670a