1,721,733 research outputs found
Can tree seedlings survive increased flood levels of rivers?
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14224.pdf (Publisher’s version ) (Open Access
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Monitoreo del proceso de mantenimiento de grupos electrógenos bajo la normativa ISO 14224, en una central termoeléctrica de la región Loreto
Full text linkEn la actualidad resulta importante comprender diversas soluciones en respuesta a
los indicadores sobre un estándar internacional, ello con la situación de poder
mejorar la productividad dentro de una empresa. En esa medida, el presente trabajo
de investigación comprende un estudio sobre monitoreo del proceso de
mantenimiento de grupos electrógenos bajo la normativa ISO 14224, en una central
termoeléctrica de la Región Loreto.
El objetivo de la investigación fue estimar indicadores de gestión de mantenimiento
en los grupos electrógenos con la aplicación de la normativa ISO 14224 de una
central termoeléctrica en la región Loreto. Para ello se adquirió como referencia los
indicadores de Disponibilidad y Confiabilidad en los grupos electrógenos de
centrales termoeléctricas de la región Loreto. El nivel de investigación propuesto en
el proyecto fue de tipo documental. Consistió en caracterizar una comparación de
Disponibilidad y Confiablidad de los grupos electrógenos en base a registros
antecedentes y precedentes. Asimismo, tuvo un diseño descriptivo. Para la
presentación de resultados se emplearon tablas, formulas y figuras con las
interpretaciones correspondientes.
En relación con los resultados previos a la implementación de la Norma ISO 14224,
se observó que los niveles mínimos y máximos de disponibilidad fueron 55.88% y
74.83%, además se observó que los niveles mínimos y máximos de confiabilidad
fueron 64.65% y 79.75%. En promedio resulto que la disponibilidad fue de 63.45%
y la confiabilidad fue de 71.08% en el periodo año 1 y año 2 respectivamente.
Posteriormente obtuvimos con la implementación de la Norma ISO 14224, se
observó que lo niveles mínimos y máximos de disponibilidad fueron 74.46% y
86.96% y a su vez se observó que los niveles mínimos y máximos de confiabilidad
fueron 79.61% y 92.47%. En promedio resulto que la disponibilidad fue 79.57% y la
confiabilidad fue de 86.02% en el periodo año 3 y año 4 respectivamente.
Por tanto, se comprueba la hipótesis que aplicando la norma ISO 14224 a los grupos
electrógenos se mejora de manera significativa los indicadores de disponibilidad y
confiabilidad.At present it is important to understand various solutions in response to the indicators
on an international standard, this with the situation of being able to improve
productivity within a company. To that extent, this research work includes a study on
monitoring the maintenance process of generators under ISO 14224, in a
thermoelectric power plant in the Loreto Region.
The objective of the research was to estimate maintenance management indicators
in generator sets with the application of ISO 14224 standards of a thermoelectric
power plant in the Loreto region. For this purpose, the indicators of Availability and
Reliability in the generator sets of thermoelectric power plants in the Loreto region
were acquired as a reference. The level of research proposed in the project was
documentary. It consisted of characterizing a comparison of Availability and
Reliability of the generator sets based on antecedent and precedent records. It also
had a descriptive design. For the presentation of results, tables, formulas and figures
with the corresponding interpretations were used.
In relation to the results prior to the implementation of ISO 14224, it was observed
that the minimum and maximum levels of availability were 55.88% and 74.83%, and
the minimum and maximum levels of reliability were 64.65% and 79.75%. On
average, availability was 63.45% and reliability was 71.08% in year 1 and year 2
period, respectively. Subsequently, with the implementation of ISO 14224, it was
observed that the minimum and maximum levels of availability were 74.46% and
86.96% and the minimum and maximum levels of reliability were 79.61% and
92.47%. On average, availability was 79.57% and reliability was 86.02% in year 3
and year 4 period respectively.
Therefore, the hypothesis that applying ISO 14224 to generator sets significantly
improves availability and reliability indicators is tested.Tesi
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
Metodología para Mejorar el Comisionamiento de Plantas Nuevas Integrando las Normas ISO 55000: 2014 y ISO 14224:2016, Caso de Estudio: Plantas de Generación Eléctrica Solar Fotovoltaica y Eólica
No full textAbstract The commissioning of new plants is a fundamental part of the energy production process, the objective of this article is to present a methodology that allows Improving the Commissioning of wind and solar photovoltaic plants, for this the ISO 55000: 2014 and ISO 14224 standards were taken: 2016 and this results in a four-phase methodology: Phase 1: ISO 14224 Taxonomy Standard. Phase 2: ISO 31000 Standard Criticality. Phase 3: RCM (Reliability Centred Maintenance) Methodology. Phase 4: Contributions of the phases to the requirements of the ISO 55001 standard. It is concluded that by applying this methodology the commissioning of wind and solar photovoltaic plants is improved.Resumo O comissionamento de novas usinas é parte fundamental do processo de produção de energia, o objetivo deste artigo é apresentar uma metodologia que permita o Melhoria do Comissionamento de usinas eólicas e solares fotovoltaicas, para isso foram adotadas as normas ISO 55000: 2014 e ISO 14224: 2016 e isso resulta em uma metodologia de quatro fases: Fase 1: Padrão de Taxonomía ISO 14224 Fase 2: Criticidade do padrão ISO 31000 Fase 3: Metodologia RCM (Manutenção Centrada em Confiabilidade) Fase 4: Contribuições das fases aos requisitos da norma ISO 55001. Conclui-se que com a aplicação desta metodologia melhora-se o comissionamento de usinas eólicas e solares fotovoltaicas.Resumen El comisionamiento de plantas nuevas es una parte fundamental del proceso de producción energía, el objetivo de este artículo es presentar una metodología que permita Mejorar el Comisionamiento de las plantas eólicas y solares fotovoltaicas, para esto se tomaron las normas ISO 55000:2014 e ISO 14224:2016 y con esto se tiene como resultado una metodología de cuatro fases: Fase 1: Norma ISO 14224 Taxonomía. Fase 2: Norma ISO 31000 Criticidad. Fase 3: Metodología RCM (Reliability Centred Maintenance). Fase 4: Aportes de las fases a los requisitos de norma ISO 55001. Se concluye que al aplicar esta metodología se mejora el comisionamiento de las plantas eólicas y solares fotovoltaicas
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