scholarly journals Protocolo OAI-PMH e Sistemas Federados de Informação │ OAI-PMH protocol and Federated Information Systems

2012 ◽  
Vol 8 (2) ◽  
Author(s):  
Dalton Lopes Martins ◽  
Sueli Mara S. P. Ferreira
Keyword(s):  
Social Network ◽  
Digital Libraries ◽  
Scientific Production ◽  
Information Architecture ◽  
Scientific Communities ◽  
Scientific Analysis ◽  
First Results ◽  
Federated Information Systems ◽  
Open Archives

Resumo O movimento de Arquivos Abertos através do protocolo OAI-PMH tem facilitado a criação de federações de bibliotecas digitais que permitem ampla agregação de produção científica, criando condições para a construção de importantes bases de dados para pesquisa bibliométrica, cientométrica, análise de redes sociais e outros modos de análise. Como um meio privilegiado para avaliação e identificação de padrões de produção da informação em diferentes comunidades científicas, as bibliotecas digitais federadas podem ser utilizadas como fontes de dados para pesquisa científica. A construção dessas bases de dados envolve diversos passos iniciando pelo modo com que a informação deve ser estruturada pelas bibliotecas locais, a forma como deve ser compartilhada em um ambiente de rede e sintetizada de modo a garantir visualizações integradas da informação. Questões relevantes sobre a qualidade dos metadados também são abordadas do ponto de vista metodológico e do modo como impactam as possibilidades de análise científica. Apresentamos neste artigo os fundamentos de como essa arquitetura de informação foi aplicada na construção do portal Univerciencia.org, com foco específico na produção científica da área da Ciências da Comunicação, bem como a tecnologia utilizada, as formas de estruturação e tratamento dos metadados, além dos primeiros resultados da análise de dados coletados e sua qualidade.Palavras-chave bibliotecas digitais, sistemas federados, OAI-PMH, repositórios abertos, cientometria, bibliometriaAbstract The Open Archives Initiative movement using the OAI-PMH protocol has allowed the production of federated digital libraries that provide wide aggregation of scientific production, creating conditions for the construction of important databases that enable the development of bibliometric research, scientometric, social network analysis and other modes of analysis. As a privileged means for evaluating and identifying patterns of information production in different scientific communities, federated digital libraries can be used as a source to study these communities. The construction of these databases involves several steps, beginning with the way information should be structured by local libraries, shared in a network environment and synthesized in order to ensure an integrated view of information. Relevant questions on the quality of such data directly impact on the possibilities of scientific analysis. We present here the foundations of how that information architecture has been implemented in the construction of the portal Univerciencia.org, which is focused on the scientific production of Communication Science, as well as the technologies involved, the ways of structuring metadata and the first results of analyzes of the data collected and  their metadata quality.Keywords digital libraries, federated systems, OAI-PMH open repositories, scientometrics, bibliometrics

scholarly journals Website quality: An analysis of scientific production

2020 ◽  
Author(s):  
Alejandro Morales-Vargas ◽  
Rafael Pedraza-Jiménez ◽  
Lluís Codina
Keyword(s):  
Scientific Community ◽  
Web Of Science ◽  
Scientific Production ◽  
Information Architecture ◽  
General Application ◽  
Website Quality ◽  
Number Of Publications ◽  
Number Of Citations ◽  
Constant Growth

A range of different methods and tools have been proposed by both academics and professionals in recent years for evaluating the quality of websites. Some are of general application and can be used to assess any type of website, while others have been adapted to the specialized characteristics of the websites employed in a given sector. This paper undertakes an analysis of existing scientific production in this field, with the aim of identifying its most relevant publications, its principal authors and the specific sectors served by the sites under evaluation. By triangulating review methods, 716 texts, published between 2000 and 2018, were identified in Scopus, Web of Science and other databases and examined. In addition to basic bibliographic information, the number of citations received by each text was recorded using Google Scholar. The area of knowledge in which each author works was also categorized based on his or her specific affiliations. The results point to a growing interest in website quality in a scientific community that has a presence in more than 70 countries. Its authors are drawn from various disciplines, although the highest number of publications is recorded in computer science, business and medical informatics. The most frequently cited texts are in fact seminal books in the associated disciplines of usability, information architecture and user experience. However, as of 2007, the number of texts describing evaluation tools for the websites of specific sectors – most notably, education (33%), health (27%) and commerce (21%) – increased their share. In conclusion, it is evident that website quality is a field of study undergoing constant growth and increasing specialization and one that offers ample opportunities for research.

scholarly journals Bibliometric Analysis of the Scientific Production of the Information Architecture Related to Libraries

2017 ◽  
pp. 1-15
Author(s):  
Vitor Taga ◽  
Danielly Oliveira Inomata ◽  
Caroline Rodrigues Vaz ◽  
Maurício Uriona Maldonado ◽  
Gregorio Varvakis
Keyword(s):  
World Wide Web ◽  
Bibliometric Analysis ◽  
Digital Libraries ◽  
World Wide ◽  
Web Of Science ◽  
Scientific Production ◽  
Information Architecture ◽  
Palabras Clave

Objetivo. La arquitectura de la información es un elemento norteador determinante para la disposición del contenido y facilitador para la navegación del usuário. Este trabajo tiene como objetivo identificar y caracterizar la producción científica sobre arquitetura de la información relacionada a las bibliotecas.Método. Se realizó una revisión bibliométrica y un análisis sistémico, la primera para identificar cuáles son los artículos más citados, los autores que más publican en el área, las principales revistas científicas; el segundo análisis para caracterizar las discusiones y resultados presentados en los artículos. Para la revisión de literatura estructurada, se usó el método Proknow-C, la investigación fue realizada en las bases de datos Web of Science, Scopus y Science Direct.Resultados. Fueron identificados 115 artículos, de este resultado se verifica un ápice en el numero de publicacionesen  los años de 2001 (5), 2002 (6) y 2006 (4).Conclusiones. Las publicaciones están concentradas en las subáreas de Ciencias Sociales y Ciencia de la Computación. Las principales palabras clave (Digital libraries, Information architecture y World Wide Web) ya contextualizan representativamente el contenido de los artículos recuperados. Con relación al análisis del contenido de los artículos, se discute que existe una convergencia de trabajos enfocados a estudios de arquitetura de la información y bibliotecas digitales, lo que es muy coherente con lo que la literatura sobre el asunto apunta: la arquitetura de la información es un facilitador del acceso a la información, haciendo los ambientes de información digital mejor señalizados.

Extraverts Have Larger Social Network Layers

2011 ◽  
Vol 32 (3) ◽  
pp. 161-169 ◽  
Author(s):  
Thomas V. Pollet ◽  
Sam G. B. Roberts ◽  
Robin I. M. Dunbar
Keyword(s):  
Social Network ◽  
Social Relationships ◽  
Outer Layer ◽  
Network Size ◽  
Emotional Intensity ◽  
Emotional Closeness ◽  
Network Layer ◽  
Network Layers ◽  
Social Network Size

Previous studies showed that extraversion influences social network size. However, it is unclear how extraversion affects the size of different layers of the network, and how extraversion relates to the emotional intensity of social relationships. We examined the relationships between extraversion, network size, and emotional closeness for 117 individuals. The results demonstrated that extraverts had larger networks at every layer (support clique, sympathy group, outer layer). The results were robust and were not attributable to potential confounds such as sex, though they were modest in size (raw correlations between extraversion and size of network layer, .20 < r < .23). However, extraverts were not emotionally closer to individuals in their network, even after controlling for network size. These results highlight the importance of considering not just social network size in relation to personality, but also the quality of relationships with network members.

’Propylene glycolate’ used as a top coat seal to protect thick juice from degradation in ellipsoidal storage tanks

2013 ◽  
pp. 215-218
Author(s):  
Robert O. Hatch ◽  
Craig M. Giles ◽  
Jay S. Creiglow ◽  
David R. Smith
Keyword(s):  
Propylene Glycol ◽  
Barrier Layer ◽  
Chemical Properties ◽  
Polypropylene Glycol ◽  
Storage Tanks ◽  
First Results ◽  
Thick Juice

The use of sodium propylene glycol for thick juice storage was investigated at Spreckels Sugar Company, in Brawley, California (USA). Sodium-polypropylene glycol has a density of 1.07 and does not mix with thick juice. Therefore it is suitable as a barrier layer. Chemical properties of propylene glycol, and the deposition on the top of thick juice are described. First results of the last campaign are compared with data from previous years. A significantly lower tendency in the reduction of the quality of the thick juice was found.

UNDER-GRADUATE STUDENTS AND THE ROLE OF E- LIBRARIES TO UPLIFT THE QUALITY OF HIGHER EDUCATION

2018 ◽  
Vol 6 (26) ◽  
Author(s):  
Dharambeer Singh
Keyword(s):  
Graduate Students ◽  
Digital Libraries ◽  
Rural Areas ◽  
Multiple Access ◽  
Information Needs ◽  
Quality Of Higher Education ◽  
Brick And Mortar ◽  
Education Status

Digital libraries, designed to serve people and their information needs in the same way as traditional libraries, present distinct advantages over brick and mortar facilities: elimination of physical boundaries, round-the-clock access to information, multiple access points, networking abilities, and extended search functions. As a result, they should be especially well-suited for the disables. However, minorities, those affected by lower income and education status, persons living in rural areas, the physically challanged, and developing countries as a whole consistently suffer from a lack of accessibility to digital libraries. This paper evaluates the effectiveness and relevance of digital libraries currently in place and discusses what could and should be done to improve accessibility to digital libraries for under-graduate students.

Effects and Risks of Distance Learning in Higher Education

2020 ◽  
pp. 61-73
Author(s):  
Yu. M. Tsygalov
Keyword(s):  
Higher Education ◽  
Distance Learning ◽  
Online Education ◽  
New Technology ◽  
Negative Consequences ◽  
Higher Education System ◽  
First Results ◽  
Spread Of Infection ◽  
The Cost

The forced work of Russian universities remotely in the context of the pandemic (COVID-19) has generated a lot of discussion about the benefits of the new form of education. The first results were summed up and reports were presented, the materials of which showed that the main goal of online education — the prevention of the spread of infection, - has been achieved. Against this background, proposals and publications have appeared substantiating the effectiveness of the massive introduction of distance learning in Russia, including in higher education. However, the assessment of such training by the population and students in publications and in social networks was predominantly negative and showed that the number of emerging problems exceeds the possible benefits of the new educational technology. Based on the analysis of the materials of publications and personal experience of teaching online, the potential benefits and problems of distance learning in higher education in Russia are considered. It is proposed to consider the effects separately for the suppliers of new technology (government, universities) and consumers (students, teachers, society). It is substantiated that the massive introduction of online education allows not only to reduce the negative consequences of epidemics, but also to reduce budgetary funding for universities, optimize the age composition of teachers, and reduce the cost of maintaining educational buildings. However, there will be a leveling / averaging of the quality of education, and responsibility for the quality of training will shift from the state/universities to students. The critical shortcomings of online education are the low degree of readiness of the digital infrastructure, the lack of a mechanism for identifying and monitoring the work of students, information security problems, and the lack of trust in such training of the population. The massive use of online education creates a number of risks for the country, the most critical of which is the destruction of the higher education system and a drop in the effectiveness of personnel training. The consequences of this risk realization are not compensated by any possible budget savings.

Creation of physiologic rhythm by closed loop stimulation in heart failure patients with severe chronotropic incompetence: worldwide first results of a pilot study

2020 ◽  
Vol 41 (Supplement_2) ◽  
Author(s):  
J Proff ◽  
B Merkely ◽  
R Papp ◽  
C Lenz ◽  
P.J Nordbeck ◽  
...  
Keyword(s):  
Heart Rate ◽  
Closed Loop ◽  
Funding Source ◽  
Chronotropic Incompetence ◽  
First Results ◽  
The Mean ◽  
Group 2 ◽  
Group 1

Abstract Background The prevalence of chronotropic incompetence (CI) in heart failure (HF) population is high and negatively impacts prognosis. In HF patients with an implanted cardiac resynchronisation therapy (CRT) device and severe CI, the effect of rate adaptive pacing on patient outcomes is unclear. Closed loop stimulation (CLS) based on cardiac impedance measurement may be an optimal method of heart rate adaptation according to metabolic need in HF patients with severe CI. Purpose This is the first study evaluating the effect of CLS on the established prognostic parameters assessed by the cardio-pulmonary exercise (CPX) testing and on quality of life (QoL) of the patients. Methods A randomised, controlled, double-blind and crossover pilot study has been performed in CRT patients with severe CI defined as the inability to achieve 70% of the age-predicted maximum heart rate (APMHR). After baseline assessment, patients were randomised to either DDD-CLS pacing (group 1) or DDD pacing at 40 bpm (group 2) for a 1-month period, followed by crossover for another month. At baseline and at 1- and 2-month follow-ups, a CPX was performed and QoL was assessed using the EQ-5D-5L questionnaire. The main endpoints were the effect of CLS on ventilatory efficiency (VE) slope (evaluated by an independent CPX expert), the responder rate defined as an improvement (decrease) of the VE slope by at least 5%, percentage of maximal predicted heart rate reserve (HRR) achieved, and QoL. Results Of the 36 patients enrolled in the study, 20 fulfilled the criterion for severe CI and entered the study follow-up (mean age 68.9±7.4 years, 70% men, LVEF=41.8±9.3%, 40%/60% NYHA class II/III). Full baseline and follow-up datasets were obtained in 17 patients. The mean VE slope and HRR at baseline were 34.4±4.4 and 49.6±23.8%, respectively, in group 1 (n=7) and 34.5±12.2 and 54.2±16.1% in group 2 (n=10). After completing the 2-month CPX, the mean difference between DDD-CLS and DDD-40 modes was −2.4±8.3 (group 1) and −1.2±3.5 (group 2) for VE slope, and 17.1±15.5% (group 1) and 8.7±18.8% (group 2) for HRR. Altogether, VE slope improved by −1.8±2.95 (p=0.31) in DDD-CLS versus DDD-40, and HRR improved by 12.9±8.8% (p=0.01). The VE slope decreased by ≥5% in 47% of patients (“responders to CLS”). The mean difference in the QoL between DDD-CLS and DDD-40 was 0.16±0.25 in group 1 and −0.01±0.05 in group 2, resulting in an overall increase by 0.08±0.08 in the DDD-CLS mode (p=0.13). Conclusion First results of the evaluation of the effectiveness of CLS in CRT patients with severe CI revealed that CLS generated an overall positive effect on well-established surrogate parameters for prognosis. About one half of the patients showed CLS response in terms of improved VE slope. In addition, CLS improved quality of life. Further clinical research is needed to identify predictors that can increase the responder rate and to confirm improvement in clinical outcomes. Funding Acknowledgement Type of funding source: Private company. Main funding source(s): Biotronik SE & Co. KG

scholarly journals Together, We Can Make This Place Our Home: Civic Engagement Among Asian Immigrants

2020 ◽  
Vol 4 (Supplement_1) ◽  
pp. 99-99
Author(s):  
Cindy Bui ◽  
Kyungmin Kim ◽  
Qian Song ◽  
Yuri Jang
Keyword(s):  
Social Network ◽  
Civic Engagement ◽  
Asian American ◽  
American Culture ◽  
City Council ◽  
Asian Immigrants ◽  
The City ◽  
The U.S ◽  
Acculturation Factors

Abstract Civic engagement is an important dimension of age-friendly communities but has been understudied among Asian immigrant groups. While research has attributed greater civic engagement among immigrants to acculturation factors, the influence of acculturation may be conditioned upon Asian immigrants’ social network and place attachment to their city. We used data from the Asian American Quality of Life survey to analyze civic engagement activity (e.g., City council meeting, voting in a City election) among a diverse sample of middle-aged and older Asian immigrants in Austin, Texas (N = 994). 34.5% of the sample had participated in at least one civic engagement activity in the past 12 months. We examined how such civic engagement is associated with acculturation factors, and further examined whether one’s friend network and perception of their city moderated the association. We found that number of years lived in the U.S., familiarity with mainstream American culture, and number of friends in one’s social network were positively related to civic engagement activity. Furthermore, we found that the association between years lived in the U.S. and civic engagement was more pronounced for immigrants with larger friend networks; the association between familiarity with American culture and civic engagement was more pronounced for immigrants with more positive perceptions of the city. These findings highlight that acculturation may not operate alone in civic engagement among Asian immigrants. Rather, it may also be important to create opportunities for Asian immigrants to feel connected to their community and build meaningful friend networks to encourage civic engagement.

Comparison and Application of Metrics That Define the Components Modularity in Complex Products

2008 ◽  
Author(s):  
Qi D. Van Eikema Hommes
Keyword(s):  
Social Network ◽  
Centrality Measures ◽  
Software Systems ◽  
Network Centrality ◽  
Good Pair ◽  
Centrality Metrics ◽  
The Social ◽  
Social Network Centrality ◽  
Sample Test

As the content and variety of technology increases in automobiles, the complexity of the system increases as well. Decomposing systems into modules is one of the ways to manage and reduce system complexity. This paper surveys and compares a number of state-of-art components modularity metrics, using 8 sample test systems. The metrics include Whitney Index (WI), Change Cost (CC), Singular value Modularity Index (SMI), Visibility-Dependency (VD) plot, and social network centrality measures (degree, distance, bridging). The investigation reveals that WI and CC form a good pair of metrics that can be used to assess component modularity of a system. The social network centrality metrics are useful in identifying areas of architecture improvements for a system. These metrics were further applied to two actual vehicle embedded software systems. The first system is going through an architecture transformation. The metrics from the old system revealed the need for the improvements. The second system was recently architected, and the metrics values showed the quality of the architecture as well as areas for further improvements.

The impact of the social network, stigma and empowerment on the quality of life in patients with schizophrenia

2011 ◽  
Vol 26 (1) ◽  
pp. 28-33 ◽  
Author(s):  
I. Sibitz ◽  
M. Amering ◽  
A. Unger ◽  
M.E. Seyringer ◽  
A. Bachmann ◽  
...  
Keyword(s):  
Quality Of Life ◽  
Social Network ◽  
Structural Equation ◽  
Internalized Stigma ◽  
Stigma Reduction ◽  
Equation Modelling ◽  
The Social ◽  
Recovery Approach ◽  
The Impact

Abstract:Objective:The quality of life (QOL) of patients with schizophrenia has been found to be positively correlated with the social network and empowerment, and negatively correlated with stigma and depression. However, little is known about the way these variables impact on the QOL. The study aims to test the hypothesis that the social network, stigma and empowerment directly and indirectly by contributing to depression influence the QOL in patients with schizophrenia and schizoaffective disorders.Method:Data were collected on demographic and clinical variables, internalized stigma, perceived devaluation and discrimination, empowerment, control convictions, depression and QOL. Structural equation modelling (SEM) was applied to examine the impact of the above-mentioned constructs on QOL.Results:The influences of the social network, stigma, empowerment and depression on QOL were supported by the SEM. A poor social network contributed to a lack of empowerment and stigma, which resulted in depression and, in turn, in poor QOL. Interestingly, however, the social network and stigma did not show a direct effect on QOL.Conclusions:Following a recovery approach in mental health services by focusing on the improvement of the social network, stigma reduction and especially on the development of personal strength has the potential to reduce depression in patients with psychosis and improving their QOL.

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