bluuebunny/crossref_metadata_2025_split huggingface dataset:
REVENCYT and BDTV: Venezuelan initiatives on digital libraries
Authors: Rosales N. Fabiola , Bauste Marlene , Rodríguez Fernando , León Francisco 
Published: June 2009

AbstractSince 2002 in Venezuela, creation of digital libraries has been discussed and promoted in order to diffuse the historical, cultural, audiovisual, and scientific‐academic heritage. Projects such as “El Zulia en el Tiempo” and “Luces de Bolívar” treat cultural and historical matters, “Artistas Populares del Estado Sucre” works on audiovisual legacy, and for the scientific‐academic areas, the index “SciELO‐Venezuela”, both, the index and the digital library of “Revistas Venezolanas de Ciencia y Tecnología (REVENCYT)”, and the Digital Library of Venezuelan Theses (BDTV). This article will focus in the last two mentioned projects of the scientific_academic area, in one hand, for being the first to be completed with the participation of research and academic institutions, and in the other hand, for offering the greater amount of contents. REVENCYT has approximately of 8.776 full text articles and the BDTV has approximately 22.240 thesis and undergraduate and graduate projects from eight (8) national universities.
A conceptual framework for improving information retrieval in folksonomy using Library of Congress subject headings
Authors: Yi Kwan 
Published: June 2009

AbstractSocial tagging or collaborative tagging is a new trend in the organization, management, and discovery of digital information. Folksonomy, a collection of tags assigned to online information by all participants of social tagging systems, has many advantages as an information organization tool. As an information retrieval tool, however, folksonomy lacks the capability of discerning the relevancy of information. We propose a conceptual framework of IR for folksonomy on the basis of Library of Congress Subject Headings. Algorithms for constructing the conceptual framework are described, and values of the framework are also discussed.
ASIS&T 2008 annual meeting poster FRBR and the 'known‐item' search
Authors: Carlyle Allyson , Becker Samantha R. 
Published: June 2009

AbstractThe purpose of this research is to study the phenomenon of the “known‐item search,” to investigate and map out its parameters. The research reported on here is the result of pretesting a survey that will be administered to public and academic library users looking for a particular book, asking them about the extent to which they would accept the substitute of a related item for the one they are looking for. The research is being framed in terms of the 1998 document model, Functional Requirements for Bibliographic Records (FRBR), in which different levels, or aspects, of content have been identified. FRBR is being incorporated into international library cataloging standards, however, research is only now beginning to be conducted to test the applicability of the model to people who are actually searching for documents. The study has two purposes: first, to improve information systems, particularly online catalogs, using specific knowledge of the range of acceptable items that may be the object of a search, and second, to determine the extent to which the FRBR model is useful in describing entities of interest to library users.
The potential role of ILS schools in educating medical informationists1
Authors: Wildemuth Barbara M. , Schaeffer Peggy , Gollop Claudia , Schardt Connie , Thibodeau Patricia L. 
Published: June 2009

AbstractMedical informationists can make significant contributions to the intersection of medicine and information and library science. Based on input from approximately 50 medical informationists, a checklist of needed knowledge/skills was compiled. The curricula of 19 schools of information and library science (ILS) were then evaluated, in terms of their coverage of the required knowledge/skills. Course offerings on topics related to technology and information content were abundant, while coverage of topics related to users/people, communication and interpersonal skills, and intellectual outlook/personal attributes was spotty. Based on this analysis, the potential of ILS schools to educate medical informationists is discussed.
The Educators Coop: A virtual world model for real world collaboration
Authors: Jarmon Leslie , Sanchez Joe 
Published: June 2009

AbstractResearch is presented examining the effectiveness of Second Life (SL), a 3‐D virtual world, as a collaborative work tool for a virtual group of 42 real educators and researchers from diverse disciplines and geographical regions. The study focuses on phase one of research being conducted in the Educators Coop, the first long term virtual residential community established in SL specifically for educators and researchers. Six primary themes emerged from the content analysis of the members' responses to the open‐ended interview question “How have you used the Educators Coop?” Primarily, the 3‐D virtual space is being used to collaborate, to learn, to do real work, to work alone, to network with neighbors, and to build. Some challenges include overloaded work schedules, time zones differences, and computer technology requirements and glitches.
Game Scholar: Do we need a reference database for video game research?
Authors: Geisler Gary , Stenis Paul , Martinez Jesse , King Allison 
Published: June 2009

AbstractGiven the growing influence of video games and the likelihood that video games will be the focus of an increasing amount of criticism and research, we suggest that a comprehensive information resource on the topic could be of significant value to the scholarly community. The Game Scholar prototype and research study are aimed at understanding whether there is in fact a need for such a resource and if so, what information would be most useful to include in the resource.
Dealing with spam: Some observations and recommendations
Authors: Martin Samuel P. , Lueg Christopher P. 
Published: June 2009

AbstractThe email communication system is threatened by unsolicited commercial email aka spam. Spam filters help reduce the amount of spam users have to cope with but often, users have difficulties understanding how these filters actually assess messages to be spam or ham. We conducted a number of user experiments using a simulated email interface providing detailed information about spam assessments. Feedback suggests that the additional information provided by the email interface was welcome.
Documenting the cultural progress of Puerto Rico in the early twentieth century: (A research project in progress)
Authors: Qayyum Asim 
Published: June 2009

AbstractThis research work is identifying and documenting information about the cultural events and their development in Puerto Rico. The purpose of this initiative is to increase awareness and understanding of the diversity and richness of the Puerto Rican culture. To achieve this objective, the research focuses on information contained within the catalogues published by museums and institutes in Puerto Rico in the first half of the twentieth century. Theses catalogues are being digitized and the digital objects are being placed in a repository. Guidelines for developing collaborative permissions policies will also be formulated to focus on copyright procedures and requirements for capturing, documenting, reusing, and portraying the information about cultural objects on the island. A two‐phase methodology is being followed. In the first phase, the catalogues existing in the libraries and museum of arts in the university are being examined and a sample is being digitized. This information will be used to identify the important institutes and prominent artists during the period under study, and develop profiles highlighting their works. The second phase will involve looking at catalogues that potentially exist in other institutes, libraries, and non‐profit foundations around the island. In both phases, metadata will be created for a sample of documents and they will be placed in a digital repository. All in all, this project will portray the important art, music, and literary events related to Puerto Rican culture, customs, and traditions. Any researcher, historian, or cultural enthusiast searching for information would then immensely benefit from knowing the descriptions of such heritage; information that will be provided by this project.
Dietary quercetin alleviates diabetic symptoms and reduces streptozotocin‐induced disturbance of hepatic gene expression in mice
Authors: Kobori Msauko , Masumoto Saeko , Akimoto Yukari , Takahashi Yumiko 
Published: June 2009

AbstractQuercetin is a food component that may ameliorate the diabetic symptoms. We examined hepatic gene expression of BALB/c mice with streptozotocin (STZ)‐induced diabetes to elucidate the mechanism of the protective effect of dietary quercetin on diabetes‐associated liver injury. We fed normal and STZ‐induced diabetic mice with diets containing quercetin for 2 wk and compared the patterns of hepatic gene expression in these groups of mice using a DNA microarray. Diets containing 0.1 or 0.5% quercetin lowered the STZ‐induced increase in blood glucose levels and improved plasma insulin levels. A cluster analysis of the hepatic gene expressions showed that 0.5% quercetin diet suppressed STZ‐induced alteration of gene expression. Gene set enrichment analysis (GSEA) and quantitative RT‐PCR analysis showed that the quercetin diets had greatest suppressive effect on the STZ‐induced elevation of expression of cyclin‐dependent kinase inhibitor p21(WAF1/Cip1) (Cdkn1a). Quercetin also suppressed STZ‐induced expression of Cdkn1a in the pancreas. Dietary quercetin might improve liver and pancreas functions by enabling the recovery of cell proliferation through the inhibition of Cdkn1a expression. Unexpectedly, in healthy control mice the 0.5 and 1% quercetin diets reduced the expression of ubiquitin C (Ubc), which has heat‐shock element (HSE) in the promoter region, in the liver.
Dietary procyanidins enhance transcriptional activity of bile acid‐activated FXR in vitro and reduce triglyceridemia in vivo in a FXR‐dependent manner
Authors: Del Bas Josep Maria , Ricketts Marie‐Louise , Vaqué Montserrat , Sala Esther , Quesada Helena , Ardevol Anna , Salvadó M. Josepa , Blay Mayte , Arola Lluís , Moore David D. , Pujadas Gerard , Fernandez‐Larrea Juan , Bladé Cinta 
Published: June 2009

AbstractConsumption of dietary flavonoids has been associated with reduced mortality and risk of cardiovascular disease, partially by reducing triglyceridemia. We have previously reported that a grape seed procyanidin extract (GSPE) reduces postprandial triglyceridemia in normolipidemic animals signaling through the orphan nuclear receptor small heterodimer partner (SHP) a target of the bile acid receptor farnesoid X receptor (FXR). Our aim was to elucidate whether FXR mediates the hypotriglyceridemic effect of procyanidins. In FXR‐driven luciferase expression assays GSPE dose‐dependently enhanced FXR activity in the presence of chenodeoxycholic acid. GSPE gavage reduced triglyceridemia in wild type mice but not in FXR‐null mice, revealing FXR as an essential mediator of the hypotriglyceridemic actions of procyanidins in vivo. In the liver, GSPE downregulated, in an FXR‐dependent manner, the expression of the transcription factor steroid response element binding protein 1 (SREBP1) and several SREBP1 target genes involved in lipogenesis, and upregulated ApoA5 expression. Altogether, our results indicate that procyanidins lower triglyceridemia following the same pathway as bile acids: activation of FXR, transient upregulation of SHP expression and subsequent downregulation of SREBP1 expression. This study adds dietary procyanidins to the arsenal of FXR ligands with potential therapeutic use to combat hypertriglyceridemia, type 2 diabetes and metabolic syndrome.
Prediction of uniaxial compression PFC3D model micro‐properties using artificial neural networks
Authors: Tawadrous A. S. , DeGagné D. , Pierce M. , Mas Ivars D. 
Published: June 2009

AbstractArtificial neural networks are used to predict the micro‐properties of particle flow code in three dimensions (PFC3D) models needed to reproduce macro‐properties of cylindrical rock samples in uniaxial compression tests. Data for the training and verification of the networks were obtained by running a large number of PFC3D models and observing the resulting macro‐properties. Four artificial networks based on two different architectures were used. The networks used different numbers of input parameters to predict the micro‐properties. Multi‐layer perceptron networks using Young's modulus, Poisson's ratio, uniaxial compressive strength, model particle resolution and the maximum‐to‐minimum particle ratio showed excellent performance in both training and verification. Adding one more variable—namely, minimum particle radius—showed degrading performance. Copyright © 2009 John Wiley & Sons, Ltd.
A note on harmonic Ritz values and their reciprocals
Authors: Vömel Christof 
Published: June 2009

AbstractThis note summarizes an investigation of harmonic Ritz values to approximate the interior eigenvalues of a real symmetric matrix A while avoiding the explicit use of the inverse A−1.We consider a bounded functional ψ that yields the reciprocals of the harmonic Ritz values of a symmetric matrix A. The crucial observation is that with an appropriate residual s, many results from Rayleigh quotient and Rayleigh–Ritz theory naturally extend. The same is true for the generalization to matrix pencils (A, B) when B is symmetric positive definite.These observations have an application in the computation of eigenvalues in the interior of the spectrum of a large sparse matrix. The minimum and maximum of ψ correspond to the eigenpairs just to the left and right of zero (or a chosen shift). As a spectral transformation, this distinguishes ψ from the original harmonic approach where an interior eigenvalue remains at the interior of the transformed spectrum. As a consequence, ψ is a very attractive vehicle for a matrix‐free, optimization‐based eigensolver. Instead of computing the smallest/largest eigenvalues by minimizing/maximizing the Rayleigh quotient, one can compute interior eigenvalues as the minimum/maximum of ψ. Copyright © 2009 John Wiley & Sons, Ltd.
Efficient sampling for spatial uncertainty quantification in multibody system dynamics applications
Authors: Schmitt Kyle P. , Anitescu Mihai , Negrut Dan 
Published: June 2009

AbstractWe present two methods for efficiently sampling the response (trajectory space) of multibody systems operating under spatial uncertainty, when the latter is assumed to be representable with Gaussian processes. In this case, the dynamics (time evolution) of the multibody systems depends on spatially indexed uncertain parameters that span infinite‐dimensional spaces. This places a heavy computational burden on existing methodologies, an issue addressed herein with two new conditional sampling approaches. When a single instance of the uncertainty is needed in the entire domain, we use a fast Fourier transform technique. When the initial conditions are fixed and the path distribution of the dynamical system is relatively narrow, we use an incremental sampling approach that is fast and has a small memory footprint. Both methods produce the same distributions as the widely used Cholesky‐based approaches. We illustrate this convergence at a smaller computational effort and memory cost for a simple non‐linear vehicle model. Copyright © 2009 John Wiley & Sons, Ltd.
A potentially dynamic lysosomal role for the endogenous TRPML proteins
Authors: Zeevi David A. , Frumkin Ayala , Offen‐Glasner Vered , Kogot‐Levin Aviram , Bach Gideon 
Published: June 2009

AbstractLysosomal storage disorders (LSDs) constitute a diverse group of inherited diseases that result from lysosomal storage of compounds occurring in direct consequence to deficiencies of proteins implicated in proper lysosomal function. Pathology in the LSD mucolipidosis type IV (MLIV), is characterized by lysosomal storage of lipids together with water‐soluble materials in cells from every tissue and organ of affected patients. Mutations in the mucolipin 1 (TRPML1) protein cause MLIV and TRPML1 has also been shown to interact with two of its paralogous proteins, mucolipin 2 (TRPML2) and mucolipin 3 (TRPML3), in heterologous expression systems. Heterogeneous lysosomal storage is readily identified in electron micrographs of MLIV patient cells, suggesting that proper TRPML1 function is essential for the maintenance of lysosomal integrity. In order to investigate whether TRPML2 and TRPML3 also play a role in the maintenance of lysosomal integrity, we conducted gene‐specific knockdown assays against these protein targets. Ultrastructural analysis revealed lysosomal inclusions in both TRPML2 and TRPML3 knockdown cells, suggestive of a common mechanism for these proteins, in parallel with TRPML1, in the regulation of lysosomal integrity. However, co‐immunoprecipitation assays revealed that physical interactions between each of the endogenous TRPML proteins are quite limited. In addition, we found that all three endogenous proteins only partially co‐localize with each other in lysosomal as well as extra‐lysosomal compartments. This suggests that native TRPML2 and TRPML3 might participate with native TRPML1 in a dynamic form of lysosomal regulation. Given that depletion of TRPML2/3 led to lysosomal storage typical to an LSD, we propose that depletion of these proteins might also underlie novel LSD pathologies not described hitherto. Copyright © 2009 Pathological Society of Great Britain and Ireland. Published by John Wiley & Sons, Ltd.
Complementary and alternative medical therapies used by children with cancer treated at an Italian pediatric oncology unit
Authors: Clerici Carlo Alfredo , Veneroni Laura , Giacon Barbara , Mariani Luigi , Fossati‐Bellani Franca 
Published: June 2009

AbstractBackgroundResearch has identified a growing use of complementary and alternative medicines (CAM) in the pediatric oncology setting and health care professionals should consider how they might interact with and/or be used in lieu of conventional treatment. The present study was designed to establish the prevalence of CAM usage at an Italian pediatric oncology department, and the reasons why patients used these unconventional therapies.ProcedureThis was an observational study involving parents whose children were treated for tumors at the pediatric oncology unit of the Istituto Nazionale Tumori in Milano. Data were collected on their sociodemographic variables and their use of CAM by means of a self‐administered questionnaire.ResultsWe distributed 145 questionnaires and 97 of them (67%) were returned. Judging from this survey, 12.4% of the children used at least one type of CAM and homoeopathy was the most often used. Benefits were reported by 83% of parents. The most common reasons for using CAM were to reduce the side‐effects of conventional therapies. The oncologists taking care of the patients were notified of the child's use of CAM in only one case.ConclusionCAM were used not as a substitute but in addition to conventional treatments. In almost all cases, oncologists were not informed that a child was using CAM, posing a risk of any interaction with pharmacological treatments being inadequately understood. Pediatr Blood Cancer 2009;53:599–604. © 2009 Wiley‐Liss, Inc.
Prolonged chronic phase of greater than 10 years of chronic myelogenous leukemia in a patient with congenital human immunodefeciency virus infection
Authors: Setty Bhuvana A. , Hayani Karen C. , Sharon Bruce I. , Schmidt Mary Lou 
Published: June 2009

AbstractA 15‐year‐old male with congenital HIV infection was diagnosed with chronic myelogenous leukemia (CML) at age 4 years 9 months. HIV was initially treated with zidovudine. For the last >10 years he has received didanosine, lamivudine, and nelfinavir. CML was treated with Interferon alfa (INF‐α) for >10 years and a brief course of hydroxyurea (HU). He remained in chronic phase CML since diagnosis however recent molecular monitoring revealed increased BCR/ABL transcripts necessitating a change in therapy to imatinib. The very prolonged chronic phase of CML in this patient has been unexpected especially in light of the underlying congenital HIV infection. Pediatr Blood Cancer 2009;53:658–660. © 2009 Wiley‐Liss, Inc.
Dispersion of multi‐walled carbon nanotubes in poly(aryl ether ketone) obtained by in situ polymerization
Authors: Du Ying , Hu Nantao , Zhou Hongwei , Li Peng , Zhang Peng , Zhao Xiaogang , Dang Guodong , Chen Chunhai 
Published: June 2009

AbstractBACKGROUND: Recently, much work has focused on the efficient dispersion of carbon nanotubes (CNTs) throughout a polymer matrix for mechanical and/or electrical matrices. However, CNTs used as enhancement inclusions in a high‐performance polymer matrix, especially in poly(aryl ether ketone) (PAEK), have rarely been reported. Therefore, multi‐walled carbon nanotube (MWNT)‐modified PAEK nanocomposites were synthesized by in situ polymerization of monomers of interest in the presence of pre‐treated MWNTs.RESULTS: This process enabled a uniform dispersion of MWNT bundles in the polymer matrix. The resultant MWNT/PAEK nanocomposite films were optically transparent with significant mechanical enhancement at a very low MWNT loading (0.5 wt%).CONCLUSION: These MWNT/polymer nanocomposites are potentially useful in a variety of aerospace and terrestrial applications, due to the combination of excellent properties of MWNTs with PAEK. Copyright © 2009 Society of Chemical Industry
Development of a novel toughener for epoxy resins
Authors: Dai Jia‐Bin , Kuan Hsu‐Chiang , Du Xu‐Shen , Dai Shao‐Cong , Ma Jun 
Published: June 2009

AbstractBACKGROUND: Conventional tougheners for brittle epoxy resins form micrometre‐sized particles with ineffective interfaces, and meet toughening requirements with 10–20 wt% of toughener, which unfortunately causes deterioration of other desirable properties.RESULTS: We developed a novel polyurea toughener using a facile synthesis method from isophorone diisocyanate and polyoxyalkyleneamine. Polyurea forms thick‐interface particles, and creates an effective toughness improvement: 265% increase in fracture energy release rate. More importantly, polyurea causes no deterioration of other important properties. Different from conventional epoxy/rubber or epoxy/thermoplastic composites, the epoxy/polyurea composite shows Newtonian rheological behaviour, a convenient property for processing.CONCLUSION: This study describes a novel polyurea toughener. Its unique feature is that toughness can be significantly improved at low toughener content (5 wt%) without losing other desirable properties. The study illuminates the importance of the interface for toughening in polymer blends/composites. Copyright © 2009 Society of Chemical Industry
Duality between Wilson loops and gluon amplitudes
Authors: Henn J.M. 
Published: June 2009

AbstractAn intriguing new duality between planar MHV gluon amplitudes and light‐like Wilson loops in 𝒩 = 4 super Yang‐Mills is investigated. We extend previous checks of the duality by performing a two‐loop calculation of the rectangular and pentagonal Wilson loop. Furthermore, we derive an all‐order broken conformal Ward identity for the Wilson loops and analyse its consequences. Starting from six points, the Ward identity allows for an arbitrary function of conformal invariants to appear in the expression for the Wilson loop. We compute this function at six points and two loops and discuss its implications for the corresponding gluon amplitude. It is found that the duality disagrees with a conjecture for the gluon amplitudes by Bern et al. A recent calculation by Bern et al. indeed shows that the latter conjecture breaks down at six gluons and at two loops. By doing a numerical comparison with their results we find that the duality between gluon amplitudes and Wilson loops is preserved. This review is based on the PhD thesis of the author and includes developments until May 2008.