Water clear cells; they can be seen in many tumors such as germ cell tumors, kidney lymphomas, sarcomas, thymic carcinomas, parathyroid paraganglioma. They may primary or occur a result of metastatic conditions. Therefore, histopathologically differential diagnosis difficult confusing. Clinical findings, radiological findings and histopathological evaluation required for diagnosis. 
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An element of a ring $R$ is called clear if it sum unit-regular and unit. associative each its elements clear.In this paper we defined rings extended many results to wider class. Finally, proved that commutative Bezout domain an elementary divisor only every full $2\times 2$ matrix over nontrivially clear.

the purpose of this descriptive correlational study was to determine problems and success factors among members of water user associations (wuas) in moqan, tajan and varamin areas in northern iran. the population consisted of farmers who were members of water user associations (n= 2,500). using simple random sampling procedure, 262 farmers were selected for the study. a researcher made structur...

a Nano Science and Nano Technology program and Physics Department, The Hong Kong University of Science and Technology, Clear Water Bay, Hong Kong. b KAUST-HKUST Micro/Nanofluidic Joint Laboratory, The Hong Kong University of Science and Technology, Clear Water Bay, Hong Kong. c Department of Biology, The Hong Kong University of Science and Technology, Clear Water Bay, Hong Kong. d Dalian Instit...

Abstract This study presents the effect of different parameters on scouring process around spur dikes. Our research group's stated objective was to evaluate effects sediment gradation, flow depth, angle and length process. Since most existing studies generally employed uniform sediment, in this non-uniform were selected. Experiments made a rectangular open channel conditions. Results showed tha...