70 research outputs found

    Growth and applications of GeSn-related group-IV semiconductor materials

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    We review the technology of Ge1−xSnx-related group-IV semiconductor materials for developing Si-based nanoelectronics. Ge1−xSnx-related materials provide novel engineering of the crystal growth, strain structure, and energy band alignment for realising various applications not only in electronics, but also in optoelectronics. We introduce our recent achievements in the crystal growth of Ge1−xSnx-related material thin films and the studies of the electronic properties of thin films, metals/Ge1−xSnx, and insulators/Ge1−xSnx interfaces. We also review recent studies related to the crystal growth, energy band engineering, and device applications of Ge1−xSnx-related materials, as well as the reported performances of electronic devices using Ge1−xSnx related materials

    シンキ ケツユウビョウ A カンジャ ニ タイ スル ダイ 8 インシ セイザイ オ モチイ タ キンキュウ タイオウ : 2 ニュウジ レイ ホウコク

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    確定診断前に凝固第VIII因子(F VIII)製剤の緊急投与を要した重症型血友病A の2 乳児例を報告する.症例1 は10 か月男児.反復する嘔吐を主訴に入院した.左上肢に腫張を伴う筋肉内出血と硬膜外血腫を認めた.症例2 は10 か月男児.止血困難な口唇裂傷後の出血を主訴に来院し,重度の貧血を認めた.2 例ともプロトロンビン時間(PT)正常,活性化プロトロンビン時間(APTT)の著明な延長より,血友病を強く疑った.いずれも重篤な出血を認めたため,凝固因子活性値による確定診断を待たず,緊急でF VIII製剤の投与を試みた.投与後2 例ともAPTT は改善し,出血症状も改善した.後日2 例ともにF VIII活性が1%未満と判明し,重症型血友病A と確定診断された.The cause of hemophilia A and B involves loss of factor VIII( FVIII) and factor IX( FIX), respectively. The hereditary form of this hemorrhagic disease is X-linked recessive. It is well established that the critical region for hemophilia A is localized on Xq28 and for hemophilia B on Xq27.1- 27.2. The initial symptom is bleeding in the mucous membranes often accompanied by intramuscular and intraarticular hemorrhage. The hemorrhages in the joints cause joint contracture as a sequela. The diagnosis of hemophilia is based on a normal bleeding and prothrombin time(PT)and prolonged activated partial thromboplastin time (APTT). We report here two infants of the severe typical from of hemophilia A who were treated with sufficient needed dosage of recombinant factor VIII before a final diagnosis was made. Case 1 was a 10-month-old boy. He was hospitalized for recurrent vomiting. He had intramuscular bleeding with swelling of the left shoulder and upper extremity. A head CT showed multiple epidural hematomas. Case 2 was a 10-month-old boy. He was sent to our hospital because of a lip laceration that did not stop bleeding, and he had severe anemia. We made the diagnosis of hemophilia A based on both their normal laboratory finding of PT and on the finding of extended APTT. Before confirming the decision diagnosis of hemophilia, we intravenously injected recombinant FVIII immediately, because of the severe hemorrhagic symptoms. After the therapy, both the APTT and hemorrhagic symptoms improved. These two cases were later confirmed as a severe infantile form of hemophilia A with less than 1 % factor VIII activity

    The decline in population size of the Tree Sparrow Passer montanus in Japan

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    Computational and Statistical Indistinguishabilities

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    We prove that a pair of polynomially samplable distributions are statistically indistinguishable if and only if no polynomial size circuits relative to NP sets (P NP nu -distinguishers) can tell them apart. As one application of this observation, we classify "zero-knowledge" notions that are used for interactive protocols. 1. Introduction For any pair of probability distributions, we say that they are computationally indistinguishable [GM84, Yao82] if no polynomial size circuits (which are called P nu -distinguishers) can tell them apart, and we say that they are statistically indistinguishable [GMR89] if no distinguishers (that could be infinitely powerful) can tell them apart. (See Section 2.1 for the precise definition.) Intuitively, a pair of statistically indistinguishable distributions are "statistically" so close to each other that no one can find their difference, while a pair of computationally indistinguishable distributions may be statistically different, but such a dif..
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