271 research outputs found
WHITMAN,WALT IN BRAZIL
No full textUNIV ESTADUAL PAULISTA JULIO MESQUITA FILHO,RIO CLARO,SP,BRAZILUNIV ESTADUAL PAULISTA JULIO MESQUITA FILHO,RIO CLARO,SP,BRAZI
Transcription through Intergenic Chromosomal Memory Elements of the Drosophila Bithorax Complex Correlates with an Epigenetic Switch
No full textSequence motif within trypanosome precursor tRNAs influences abundance and mitochondrial localization
No full textAuthor Posting. © American Society for Microbiology, 2003. This article is posted here by permission of American Society for Microbiology for personal use, not for redistribution. The definitive version was published in Molecular and Cellular Biology 23 (2003): 9061-9072, doi:10.1128/MCB.23.24.9061-9072.2003.Trypanosoma brucei lacks mitochondrial genes encoding tRNAs and must import nuclearly encoded tRNAs from the cytosol. The mechanism and specificity of this process remain unclear. We have identified a unique sequence motif, YGG(C/A)RRC, upstream of the genes encoding mitochondrially localized tRNAs in T. brucei. Both in vitro import studies and in vivo transfection studies indicate that deletion of the YGG(C/A)RRC sequence alters mitochondrial localization of tRNALeu, and in vivo studies also show a decrease in the cellular abundance of tRNALeu. These studies provide direct evidence for cis-acting RNA motifs within precursor tRNAs that facilitate the selection of tRNAs for mitochondrial import in trypanosomes. Furthermore, we found that mutations to the YGG(C/A)RRC sequence also altered the intracellular distribution of other endogenous tRNAs, suggesting a general role for this sequence in tRNA trafficking in trypanosomes.This work was supported by the National Institutes of Health grant
AI21401 (to S.L.H.)
An initial exploration of the link relationship between UK university Web sites.
No full textAggregates of links are of interest to information scientists in the same way as citation counts are: as potential sources of data from which new knowledge can be mined. Builds on the recent discovery of a correlation between a Web link count measure and the research quality of British universities by applying a range of multivariate statistical techniques to counts of links between pairs of universities. This represents an initial attempt at developing an understanding of this phenomenon. Extracts plausible results. Also identifies outliers in the data by the techniques, some of which were verified by being tracked down to identifiable Web phenomena. This is an important outcome because successful anomaly identification is a precondition to more effective analysis of this kind of data. The identification of groupings is encouraging evidence that Web links between universities can be mined for significant results, although it is clear that more methodological development is needed, if any but the simplest patterns are to be extracted. Finally, based upon the types of patterns extracted, argues that none of the methods used are capable of fully analysing link structures on their own
Mechanical DC circuit breaker model for real time simulations
No full textThe main goal of the paper is the modeling of the mechanical circuit breaker (MCB) that can replicate the breaker characteristics in real time environment. The proposed MCB with active current injection is modelled for a system level, which provides adequate representation of the circuit breakers for system analysis studies. External current-voltage characteristics of the proposed MCB models replicate the ones of the devices in the real world. It is well known that the DC circuit breaker (DCCB) needs to interrupt DC faults very quickly in order to avoid converter damages. The total current interruption time consists of fault detection time, time needed for the DC protection to provide command to the DCCB, and DCCB arc clearing time. Thus, it is necessary to demonstrate the system performance of associated protective devices through real time simulation, before these devices can be implemented and commissioned in practice. This paper presents a detailed modeling of the mechanical DCCB in real time simulation environment based on RTDS. The performance of the model is verified by the simulations based on PSCAD and meaningful conclusions are drawn.Intelligent Electrical Power Grid
Converging frontiers: Elizabeth Bishop's North and South'
No full textThis paper examines Elizabeth Bishop's evolving social views, as revealed through her poetry. A selection of poems, written before and after she moved to Brazil in 1951, are compared so as to disclose changes in her personal expression and in her approaches to issues of human interaction and social organization
Converging frontiers: Elizabeth Bishop's North and South'
No full textThis paper examines Elizabeth Bishop's evolving social views, as revealed through her poetry. A selection of poems, written before and after she moved to Brazil in 1951, are compared so as to disclose changes in her personal expression and in her approaches to issues of human interaction and social organization.Univ Estadual Paulista, Dept Modern Languages, BR-01405 São Paulo, BrazilUniv Estadual Paulista, Dept Modern Languages, BR-01405 São Paulo, Brazi
ケネス Ｗ．モンフォート カレッジ オブ ビジネスの教育の質保障システム
No full textP(論文)This paper describes quality assurance systems for education by the Kenneth W. Monfort College of Business (MCB). The author visited the MCB in August 2008 as a member of a study team. This paper discusses educational quality assurance in higher education based on the results of that study. Introduction of the MCB’s educational management system would assist quality assurance in Japanese higher education in future.departmental bulletin pape
Converging frontiers: Elizabeth Bishop's North and South'
No full textThis paper examines Elizabeth Bishop's evolving social views, as revealed through her poetry. A selection of poems, written before and after she moved to Brazil in 1951, are compared so as to disclose changes in her personal expression and in her approaches to issues of human interaction and social organization
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