Zero Copy
Mostrando 1-12 de 17 artigos, teses e dissertações.
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1. Uma Biblioteca para programação paralela por troca de mensagens de clusters baseados na tecnologia SCI
A presente Dissertação propõe uma biblioteca de comunicação de alto desempenho, baseada em troca de mensagens, especificamente projetada para explorar eficientemente as potencialidades da tecnologia SCI (Scalable Coherent Interface). No âmago da referida biblioteca, a qual se denominou DECK/SCI, acham-se três protocolos de comunicação distintos: um
Publicado em: 2007
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2. Implementação da biblioteca de comunicação DECK sobre o padrão de protocolo de comunicação em nível de usuário VIA / DECK communication library implementation over the standard user-level communication protocol VIA
O uso de técnicas de cópia-zero e desvio do sistema operacional permitem a diminuição da latência de comunicação e o aumento da largura de banda. Menores latências e maiores larguras de banda contribuem para que o desempenho das aplicações paralelas seja mais alto, bem como torna-as mais escaláveis. Protocolos de comunicação que utilizam-se dest
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2005
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3. Genetic control of blood pressure and the angiotensinogen locus.
Variants of the human angiotensinogen gene have been linked in some studies to increased circulating angiotensinogen levels and essential hypertension. To test for direct causality between genotypes at the angiotensinogen locus and blood pressures, we have studied mice carrying zero, one, two, three, or four functional copies of the murine wild-type angioten
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4. Reduced angiotensinogen expression attenuates renal interstitial fibrosis in obstructive nephropathy in mice
A novel approach was employed to assess the contribution of the renin-angiotensin system (RAS) to obstructive nephropathy in neonatal mice having zero to four functional copies of the angiotensinogen gene (Agt). Two-day-old mice underwent unilateral ureteral obstruction (UUO) or sham operation; 28 days later, renal interstitial fibrosis and tubular atrophy w
American Society for Clinical Investigation.
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5. Expression of the immunoglobulin VH gene 51p1 is proportional to its germline gene copy number.
51p1 is an immunoglobulin VH gene that is frequently expressed in B cell chronic lymphocytic leukemia and early in B cell ontogeny. The 51p1 gene locus is highly polymorphic, consisting of 13 alleles that can be classified as being either 51p1-related or hy1263-related, based on distinctive sequence motifs in the second complementarity determining region. Tw
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6. Fitness Effects of Ty Transposition in Saccharomyces Cerevisiae
It has been suggested that the primary evolutionary role of transposable elements is negative and parasitic. Alternatively, the target specificity and gene regulatory capabilities of many transposable elements raise the possibility that transposable element-induced mutations are more likely to be adaptively favorable than other types of mutations. Population
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7. Modeling stochastic gene expression: Implications for haploinsufficiency
There is increasing recognition that stochastic processes regulate highly predictable patterns of gene expression in developing organisms, but the implications of stochastic gene expression for understanding haploinsufficiency remain largely unexplored. We have used simulations of stochastic gene expression to illustrate that gene copy number and expression
The National Academy of Sciences.
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8. cDNAs encoding [D-Ala2]deltorphin precursors from skin of Phyllomedusa bicolor also contain genetic information for three dermorphin-related opioid peptides.
We present the structure of four precursors for [D-Ala2]deltorphins I and II as deduced from cDNAs cloned from skin of the frog Phyllomedusa bicolor. These contain the genetic information for one copy of [D-Ala2]deltorphin II and zero, one, or three copies of [D-Ala2]deltorphin I. In each case, the D-alanine of the end product is encoded by a normal GCG codo
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9. Development of verotoxin 2- and verotoxin 2 variant (VT2v)-specific oligonucleotide probes on the basis of the nucleotide sequence of the B cistron of VT2v from Escherichia coli E32511 and B2F1.
We and others have noted that there are serological differences between verotoxin 2 (VT2) (also known as Shiga-like toxin II) produced by Escherichia coli C600(933W) and the VT2 variant (VT2v) produced by strain E32511. Recent reports have described nucleotide sequence differences between the VT2v B subunit cistron of E32511 and B2F1 and that of VT2. We have
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10. 5-Methylcytosine DNA glycosylase participates in the genome-wide loss of DNA methylation occurring during mouse myoblast differentiation
Changes in gene expression during mouse myoblast differentiation were monitored by DNA microarray hybridisation. Four days after the onset of differentiation 2.37% of the genes increased in activity from a value of zero, whereas during the same time 1.68% of total genes had decreased expression. During the first 24 h of differentiation an average of 700 000
Oxford University Press.
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11. Complementation of reduced survival, hypotension, and renal abnormalities in angiotensinogen-deficient mice by the human renin and human angiotensinogen genes.
The aim of this study was to determine whether elements of the human renin-angiotensin system (RAS) could functionally replace elements of the mouse RAS by complementing the reduced survival and renal abnormalities observed in mice carrying a gene-targeted deletion of the mouse angiotensinogen gene (mAgt). Double transgenic mice containing the human renin (H
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12. Positive and Negative Regulatory Elements Control Expression of the Yeast Retrotransposon Ty3
We report the results of an analysis of Ty3 transcription and identification of Ty3 regions that mediate pheromone and mating-type regulation to coordinate its expression with the yeast life cycle. A set of strains was constructed which was isogenic except for the number of Ty3 elements, which varied from zero to three. Analysis of Ty3 expression in these st