نتایج جستجو برای: p al
تعداد نتایج: 1655458 فیلتر نتایج به سال:
infections Widad Al-Nakib, FRCPath, FIDSA; Sahar Essa, BSc, MSc, PhD; Haya Altawalah, BSc, MBBS, FRCPath; Abdullah Owayed; Mousa Khadadah; Nasser Behbehani; Microbiology Department Kuwait University, Faculty of Medicine, Kuwait; Virology Unit, Ministry of Health, Mubarak Hospital, Kuwait; Paediatrics, Kuwait University, Faculty of Medicine, Kuwait; Medicine, Kuwait University, Faculty of Medici...
Interest in the origin of Al following observation of its decay radiation in the galactic plane @1–6# and its isotopic residues in meteorites @7,8# has prompted measurements of the reactions involved in its production and destruction. Prior to the present work, resonances in the Al~p ,g!Si destruction reaction as low as Ep5288 keV had been observed directly @9#. Spectroscopy of transfer reactio...
در سال های اخیر تولید نانوکامپوزیت?های زمینه فلزی تقویت شده با نانولوله های کربنی (cnt) با خصوصیات ساختاری و مکانیکی بالا، از زمینه?های اصلی تحقیقات در زمینه مهندسی مواد بوده است. در این پژوهش، نانوکامپوزیت ریختگی a356-cnt با استفاده از فرآیندهای ریخته گری گردابی و نیمه?جامد و با تزریق ذرات تقویت?کننده به دو صورت cnt خام و پودر کامپوزیتی al-ni-p-cnt حاصل از فرآیند آبکاری الکترولس ni-p تولید شدن...
data envelopment analysis (dea) is a powerful tool for measuring relative efficiency of organizational units referred to as decision making units (dmus). in most cases dmus have network structures with internal linking activities. traditional dea models, however, consider dmus as black boxes with no regard to their linking activities and therefore do not provide decision makers with the reasons...
A key difference between quantum Hall phases induced by a magnetic field and topological insulator phases induced by spin-orbit coupling is that the latter depend crucially on a symmetry, time reversal. The action of time-reversal symmetry on electrons leads to a new kind of topological invariant in twodimensional systems [1] that takes only two possible values: if this “Z2 invariant” is even, ...
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