نتایج جستجو برای: unique extension
تعداد نتایج: 403571 فیلتر نتایج به سال:
the purpose of this study was to assess the process of extension program development in iranian agricultural extension system (iaes). the research instrument was a structural questionnaire with close-ended questions which its validity and reliability was confirmed by using expert panel and cranach’s alpha test, respectively. the target population of this research included all extension managers...
Dear Editor-in-Chief, Influenza, commonly known as the flu, is an infectious disease caused by an influenza virus (1). Symptoms can be mild to severe (2). The most common symptoms include: high fever, runny nose, sore throat, muscle pains, headache, coughing, sneezing, and feeling tired (1). Three of the four types of influenza viruses affect people, Type A, Type B, and Type C (3, 4). Type D ha...
We consider three Lie algebras: Der C((t)), the Lie algebra of all derivations on the algebra C((t)) of formal Laurent series; the Lie algebra of all differential operators on C((t)); and the Lie algebra of all differential operators on C((t)) ⊗ Cn. We prove that each of these Lie algebras has an essentially unique nontrivial central extension. The Lie algebra of all derivations on the Laurent ...
The ring Z consists of the integers of the field Q, and Dedekind takes the theory of unique factorization in Z to be clear and well understood. The problem is that unique factorization can fail when one considers the integers in a finite extension of the rationals, Q(α). Kummer showed that when Q(α) is a cyclotomic extension (i.e. α is a primitive pth root of unity for a prime number p), one ca...
In the first three sections the question of when a pure state g on a C*-subalgebra B of a C*-algebra A has a unique state extension is studied. It is shown that an extension/is unique if and only if inf||6(o — f(a)\)b\\ = 0 for each a in A, where the inf is taken over those b in B such that 0 < b < 1 and g(b) =* 1. The special cases where B is maximal abelian and/or A — B(H) are treated in more...
ependymomas are glial tumors originate from ependymal cells lining the ventricles and the central canal of the spinal cord. two thirds of ependymomas arise in the infratentorial or intraventriclesandone-third aredetected in supratentorial area. however supratentorial “cortical” ependymomas are veryuncommon. ependymomas are usually infratentorial, intraventricular tumor, including 2–9% of all ce...
Protection of primary neurons and mouse brain from Alzheimer’s pathology by molecular tweezers Aida Attar, Cristian Ripoli, Elisa Riccardi, Panchanan Maiti, Domenica D. Li Puma, Tingyu Liu, Jane Hayes, Mychica R. Jones, Kristin Lichti-Kaiser, Fusheng Yang, Greg D. Gale, Chi-hong Tseng, Miao Tan, Cui-Wei Xie, Jeffrey L. Straudinger, Frank-Gerrit Klärner, Thomas Schrader, Sally A. Frautschy, Clau...
The Semantic Web is facing the important challenge to maintain its promise of a real world-wide graph of interconnected resources. Unfortunately, while URIs almost guarantee a direct reference to entities, the relation between the two is not bijective. Many different URI references to same concepts and entities can arise when -in such a heterogeneous setting as the WWW -people independently bui...
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