50,382 research outputs found
Assessment of Self-Archiving in Institutional Repositories: Depositorship and Full-Text Availability
No full textThis research evaluates the success of open access self-archiving in several well-known institutional repositories. Two assessment factors have been applied to examine the current practice of self-archiving: depositorship and the availability of full text. This research discovers that the rate of author self-archiving is low and that the majority of documents have been deposited by a librarian or administrative staff. Similarly, the rate of full-text availability is relatively low, except for Australian repositories. By identifying different practices of self-archiving, repository managers can create new strategies for the operation of their repositories and the development of archiving policies
Information Literacy and Librarian-Faculty Collaboration: A Model for Success:
No full textIn the age of information explosion and technological advancement, issues of information storage, organization, access, and evaluation have become necessarily important in our societies. Addressing issues of information literacy and designing how they can be best integrated in students' learning process are of critical importance. Library professionals in the United States, particularly in the academia, have realized the importance of information literacy and have attempted in various ways to address these issues. The ultimate goal is to make information literacy an integral part of the academic curriculum, thus helping students to succeed not only during their years in college but also for their lifelong career choices. This article will look at ways of how information literacy can best be incorporated into students' academic experience, and how this process can make students' learning meaningful and successful. Specifically, the author will examine the model of librarian-faculty collaboration in integrating information literacy into the curriculum, as demonstrated in the Ohio Five Colleges' Information Literacy Program.Publisher version of this article is available at: http://www.white-clouds.com/iclc/cliej/cl24.ht
The Bowen–Conradi syndrome protein Nep1 (Emg1) has a dual role in eukaryotic ribosome biogenesis, as an essential assembly factor and in the methylation of Psi1191 in yeast 18S rRNA
No full textThe Nep1 (Emg1) SPOUT-class methyltransferase is an essential ribosome assembly factor and the human Bowen–Conradi syndrome (BCS) is caused by a specific Nep1D86G mutation. We recently showed in vitro that Methanocaldococcus jannaschii Nep1 is a sequence-specific pseudouridine-N1-methyltransferase. Here, we show that in yeast the in vivo target site for Nep1-catalyzed methylation is located within loop 35 of the 18S rRNA that contains the unique hypermodification of U1191 to 1-methyl-3-(3-amino-3-carboxypropyl)-pseudouri-dine (m1acp3Psi). Specific 14C-methionine labelling of 18S rRNA in yeast mutants showed that Nep1 is not required for acp-modification but suggested a function in Psi1191 methylation. ESI MS analysis of acp-modified Psi-nucleosides in a DeltaNep1-mutant showed that Nep1 catalyzes the Psi1191 methylation in vivo. Remarkably, the restored growth of a nep1-1ts mutant upon addition of S-adenosylmethionine was even observed after preventing U1191 methylation in a deltasnr35 mutant. This strongly suggests a dual Nep1 function, as Psi1191-methyltransferase and ribosome assembly factor. Interestingly, the Nep1 methyltransferase activity is not affected upon introduction of the BCS mutation. Instead, the mutated protein shows enhanced dimerization propensity and increased affinity for its RNA-target in vitro. Furthermore, the BCS mutation prevents nucleolar accumulation of Nep1, which could be the reason for reduced growth in yeast and the Bowen-Conradi syndrome
Factors to Assess Self-Archiving in Institutional Repositories
No full textThis paper proposes a group of factors that may be used to assess the success of open access self-archiving. It concentrates on self-archiving in institutional repositories. The authors emphasize the importance of examining content materials, particularly the availability of full text versus abstracts and the deposits archived by authors versus by others.Peer reviewe
Applying the NISO Metasearch Initiative Scheme to Enhance E-Resources Management at Rutgers University Library
No full textThis paper discusses problems in the management of library e-resources and attempts to identify potential solutions to the problems. By describing an e-resources enhancement project taken by Rutgers University Libraries, this paper points to the importance of providing contextually-rich metadata and reorganizing the accessibility of e-resources on a library’s website. It introduces how this Rutgers project adopted the National Information Standards Organization Metasearch Initiative to support the identification of appropriate e-collections for metaseaching. The outcomes of the project have facilitated a dynamic display of relevant e-resources to library users as an effective way of automatic access to library e-collections.Peer reviewe
A Metadata Manager's Role in Collaborative Projects: The Rutgers University Libraries Experience
No full textPurpose – This article discusses the roles and responsibilities of a metadata manager in collaborative digital projects.
Methodology – It describes the general requirements for metadata management, and introduces some scenarios in the practices of digital projects by the Rutgers University Libraries to support the generalized definition. A workflow of metadata management is illustrated.
Practical implications – With an explicit definition of the roles and responsibilities of the metadata manager, many other digital libraries that need to develop a new or optimize the existing workflow may find the Rutgers experience useful as reference.
Originality – Very few articles have explored this topic although the functions of metadata in the development of digital projects have been talked extensively.Peer reviewe
Verify the Bowen Ratio equation by using Eddy Covariance Method
No full text空氣品質模式對於污染物的擴散模擬是被擴散尺度所影響，擴散尺度是由大氣穩定度決定，大氣穩定度的計算又由可感熱通量所計算出，而包溫比是可感熱通量和潛熱通量的比值，所以包溫比決定的合理性，會影響到可感熱通量的值，進而對後續污染物擴散模擬的結果有所影響，因此希望改善不同於目前空氣品質模式裡對於包溫比是以定值作決定之方式。本研究由熱力學的理論推導出一個包溫比估算式，此估算式可由台灣的逐時氣象資料，算出逐時的包溫比。
為了驗證此估算式，本研究使用棲蘭通量站與關渡通量站的數據，也就是Eddy covariance法的數據，利用實際量測的方法探討此估算式在台灣的適用性，並且求出一個修正係數α，藉由此修正係數使理論包溫比更符合實際情況。
由研究結果顯示，在棲蘭通量站理論包溫比有明顯低估，而關渡則沒有，在經過修正後，可以改善低估的情況，而使可感熱通量與潛熱通量更符合EC法所量測。在大氣穩定度方面，是以EC法所計算的大氣穩定度為基準，去比較理論包溫比、修正後的理論包溫比以及定值包溫比三種方法所計算出來的大氣穩定度，理論包溫比和EC法結果一致的比例高於定值包溫比，且修正後的理論包溫比所求之大氣穩定度等級和EC法一致的比例可達75%以上。The air quality model to simulate pollutants’ diffusion is affected by the diffusion degree that determined by the atmospheric stability, and the calculation of the atmospheric stability can be obtained from sensible heat flux. Bowen ratio, the ratio between sensible heat flux and latent heat flux, and its rational decision will change the value of sensible heat flux as well as subsequently modify the result of contaminants simulation. Therefore, instead of setting Bowen ratio as a constant by recent air quality models, this research applies the theory of thermodynamics to deduce the estimated Bowen ratio formula that could find the time-varying Bowen ratio from time-varying weather information in Taiwan.
To verify the estimated formula, this research uses Eddy covariance data from Chilan and Guandu flux site in Taiwan to evaluate the feasibility of the formula by in-situ analysis method and then to propose one modified factorα. It is more consistent with real situation by such modified factor. According to the research result, the theoretical Bowen ratio is significantly underestimated at Chilan flux site but not at Guandu flux site. However, after applying factorα, both sensible and latent heat flux fit data that derived from Bowen ratio method. The atmospheric stability based on Eddy covariance is used to compare the resulting atmospheric stability with the theoretical, the modified and the constant Bowen ratio methods. The ratio of the same stability by the theoretical Bowen ratio and Eddy covariance is higher than the stability by the constant Bowen ratio, and the ratio that both the modified theoretical Bowen ratio and Eddy covariance show the consistent degree of the atmospheric stability is higher than 75%
Entropie sofique d'après Lewis Bowen, David Kerr et Hanfeng Li: Séminaire Bourbaki du 16 janvier 2016
No full textInternational audienceThe entropy in dynamical systems was introduced by A. Kolmogorov. Initially dedicated to iterations of one finite measure preserving transformation, the notion was gradually generalized so as to encompass amenable group actions and topological actions. L. Bowen (2008) succeeded in breaking the non-amenable frontier by introducing the sofic entropy. This invariant provides the same services as the classical entropy for the measured actions of the sofic groups (a class which contains the residually finite groups). In 2010, D. Kerr et H. Li established a topological version together with a variational principle.L'entropie, en systèmes dynamiques, fut introduite par A. Kolmogorov. Initialement focalisée sur les itérations d'une transformation préservant une mesure finie, la notion fut peu à peu généralisée, jusqu'à embrasser les actions des groupes moyen-nables ainsi que les actions topologiques. L. Bowen (2008) parvint à franchir la barrière du non moyennable en introduisant l'entropie sofique. Cet invariant rend les mêmes services que l'entropie classique pour les actions mesurées des groupes sofiques (une classe qui contient les groupes résiduellement finis). En 2010, D. Kerr et H. Li mirent au point une version topologique et un principe variationnel
Entropie sofique d'après Lewis Bowen, David Kerr et Hanfeng Li: Séminaire Bourbaki du 16 janvier 2016
No full textInternational audienceThe entropy in dynamical systems was introduced by A. Kolmogorov. Initially dedicated to iterations of one finite measure preserving transformation, the notion was gradually generalized so as to encompass amenable group actions and topological actions. L. Bowen (2008) succeeded in breaking the non-amenable frontier by introducing the sofic entropy. This invariant provides the same services as the classical entropy for the measured actions of the sofic groups (a class which contains the residually finite groups). In 2010, D. Kerr et H. Li established a topological version together with a variational principle.L'entropie, en systèmes dynamiques, fut introduite par A. Kolmogorov. Initialement focalisée sur les itérations d'une transformation préservant une mesure finie, la notion fut peu à peu généralisée, jusqu'à embrasser les actions des groupes moyen-nables ainsi que les actions topologiques. L. Bowen (2008) parvint à franchir la barrière du non moyennable en introduisant l'entropie sofique. Cet invariant rend les mêmes services que l'entropie classique pour les actions mesurées des groupes sofiques (une classe qui contient les groupes résiduellement finis). En 2010, D. Kerr et H. Li mirent au point une version topologique et un principe variationnel
Macropsis zizhongi Li, Dai et Li
No full textMacropsis zizhongi Li, Dai et Li, nom. nov. Macropsis gracilis Li et Liang, 2005: 578 –579, nom. preocc. (nec Macropsis gracilis Dubovskiy, 1966: 97) Distribution. China (Heilongjiang prov.). Etymology. The species is named in honour of Prof. Li Zizhong, the first author of the original species name.Published as part of Li, Hu, Dai, Ren-Huai, Li, Zi-Zhong & Yu, Dmitri, 2012, Taxonomic study of Chinese species of the genus Macropsis (Hemiptera: Cicadellidae: Macropsinae): new species, new records, synonymy and replacement name, pp. 41-62 in Zootaxa 3420 on page 61, DOI: 10.5281/zenodo.21216
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