139,637 research outputs found
Data on the I–V characteristics related to different PV modules at various solar irradiance and temperatures
No full textData include the open-circuit voltage, the short-circuit current and the output power of different photovoltaic solar modules obtained from a PV panel datasheet. The I–V curves as simulation results are provided at various levels of solar irradiance and temperature.
In case of using these data, please refer to following papers:
https://doi.org/10.1016/j.dib.2019.104527
https://doi.org/10.1016/j.solener.2018.02.017
https://doi.org/10.1016/j.solener.2019.07.00
Los verbos semeiar y parecer en la prosa alfonsí. Su comportamiento funcional y diferencias con ser y estar.
No full textEn el presente trabajo de fin de máster tratamos de estudiar los aspectos gramaticales de los verbos semeiar y parecer tanto a nivel léxico como a nivel funcional. Y como se enmarcan dentro del comportamiento de la relación atributiva, nos ha parecido oportuno contrastarlos con sus compañeros ser y estar, que, por otra parte, ya están bastante estudiados. Esto nos permitirá conocer mejor sus analogías y diferencias, y así poder definir con más precisión su funcionamiento dentro de la relación atributiva
Spatially-localized time dependent solutions including turbulence and their interactions in 2D Kolmogorov flow
No full textIn 2D Kolmogorov flow in small aspect ratio domains, spatially-localized solutions such as kink, traveling or time-dependent kink-antikink pars coexist. However, the conservation of the flow rate in the y direction strongly restrict combination of localized solutions and their positioning. We find that by adding a homogeneous flow U y their positioning is controlled and each of localized solutions including a spatially-localized chaos is isolated. Numerical results suggest that these isolated solutions can be elements constructing a whole flow
Characteristics of overlap region in high-Reynolds number turbulent channel flow
No full textDirect numerical simulation of the fully developed turbulent channel flows have been carried out at the Reynolds number based on the friction velocity and the channel half width, 2000, 4000 and 8000. A hybrid 10th order accurate finite difference scheme in the stream and spanwise directions, and a second-order scheme in the wall-normal direction is adapted as the spatial discretization method. We observed the plateau profiles in the indicator function corresponded to the von Karman constant. Furthermore, second peak of streamwise pre-multiplied spectra were appeared in the same wall normal height, 300 < y+ < 600, in case of Re = 4000. Nevertheless, the effects of the lager than the channel half height scale on the streamwise turbulent intensity are fixed contributions without dependence on Reynolds number. These results suggested that the new streamwise vortexes are formed between buffer layer and outer layer with increasing of Reynolds number
Estudio, caracterización y modelado avanzado de los efectos térmicos y trampa en los Transistores MESFET y HEMT de Microondas
No full textRESUMEN: En este trabajo se presenta un nuevo modelo no lineal para transistores MESFET/HEMT basados en GaAs y GaN teniendo en cuenta los efectos térmicos y trampa que muestran estos dispositivos. El modelo permite reproducir el comportamiento del dispositivo, a un rango determinado de temperatura, en régimen estático (DC), régimen pulsado y régimen dinámico RF pequeña y gran señal. La ecuación de la fuente de corriente Ids toma como base cualquier modelo DC existente sin alterar su comportamiento en este régimen de funcionamiento. Los valores de sus parámetros se extraen a partir de las características I/V DC y pulsadas llevadas a cabo solamente en unos puntos determinados de polarización. También se presenta el estudio y la caracterización de dichos efectos lo que, de un lado, permite conocer la influencia de los mismos sobre el comportamiento del transistor y, de otro lado, obtener toda la información útil y necesaria para su modelado.ABSTRACT: In this thesis, a new nonlinear model of GaAs and GaN MESFET/HEMT transistors including thermal and traps effects shown in this kind of devices has been presented. The model, along with an electric equivalent circuit and an especial extraction process strategy, can accurately predict the DC, pulsed as well as the small and large signal behaviour of the device over a large range of ambient temperature. To model drain to source current source Ids we start with a known DC equation but the approach can be applied to any other existing classical model. The model parameters values are extracted from the DC and pulsed I/V characteristics carried out just at a few bias points. A study and characterization of thermal and traps effects is presented too. This allows us to know the influence of these effects on the transistor behaviour, and to obtain all the necessary information for their modelling
La 'circunstancia' de 'Herederos y Pretendientes
No full textIn June 2010, the Ortega y Gasset Foundation hosted a Conference about the “Spanish Philosophical Transition” in order to debate the book of Francisco Vázquez, La filosofía española. Herederos y Pretendientes. Una lectura sociológica (1963-1990), recently published. This paper is the author’s response to criticism raised in the Conference and to published reviews received by this book. First, the author summarized the argument of Herederos y pretendientes. Secondly he responds and takes into account the most important objections against the book’s hypothesis and methodology. Finally the author evaluates the favorable judgments received by the book and suggests the limits of the historian’s task.Fundación Ortega y Gasset-Marañó
Author self-citation in orthodontics is associated with author origin and gender.
No full textBACKGROUND
The aims of this bibliometric study were to determine author self-citation trends in high-impact orthodontic literature and to investigate possible association between self-citation and publication characteristics.
METHODS
Six orthodontic journals with the highest impact factor as ranked by 2017 Journal Citation Reports were screened for a full publication year (2018) for original research articles, reviews, and case reports. Eligible articles were scrutinized for article and author characteristics and citation metrics. Univariable and multivariable negative binomial regression was used to examine associations between self-citation incidence and publication characteristics.
RESULTS
Medians for author self-citation rate of the most self-citing authors and self-citations were 3.03% (range 0-50) and 1 (range 0-19), respectively. In the univariable analysis, there was no association between self-citation counts and study type (P = 0.41), article topic (P = 0.61), number of authors (P = 0.62), and rank of authors (P = 0.56). Author origin (P = 0.001), gender (P = 0.001) and journal (P = 0.05) were associated with self-citation counts and in the multivariable analysis only origin and gender remained strong self-citation predictors. Asian authors and females self-cited significantly less often than all other regions and male authors.
CONCLUSIONS
Authors in orthodontics do not self-cite at a frequency that suggests potential citation manipulation. Author origin and gender were the only variables associated with citations counts. More bibliometric research is necessary to draw solid conclusions about author self-citation trends in orthodontic literature
Overview of the Author Profiling Task at PAN 2013
No full text[EN] This overview presents the framework and results for the Author Profiling
task at PAN 2013. We describe in detail the corpus and its characteristics,
and the evaluation framework we used to measure the participants performance to
solve the problem of identifying age and gender from anonymous texts. Finally,
the approaches of the 21 participants and their results are described.The author profiling task @PAN-2013 was an activity of the WIQ-EI IRSES project (Grant No. 269180) within the FP 7 Marie Curie People Framework of the European Commission. We want to thank the Forensic Lab of the Universitat Pompeu Fabra Barcelona for sponsoring the award for the winner team. The work of the first author was partially funded by Autoritas Consulting SA and by Ministerio de Economía y Competitividad de España under grant ECOPORTUNITY IPT-2012-1220-430000. The work of the second author was in the framework the DIANA-APPLICATIONS-Finding Hidden Knowledge in Texts: Applications (TIN2012-38603-C02-01) project, and the VLC/CAMPUS Microcluster on Multimodal Interaction in Intelligent Systems. The work of fifth author was funded in part by the Swiss National Science Foundation (SNF) project "Mining Conversational Content for Topic Modelling and Author Identification (ChatMiner)" under grant number 200021_130208.Rangel, F.; Rosso, P.; Koppel, M.; Stamatatos, E.; Inches, G. (2013). Overview of the Author Profiling Task at PAN 2013. CLEF Conference on Multilingual and Multimodal Information Access Evaluation. 352-365. https://riunet.upv.es/handle/10251/46636S35236
Author Co-Citation Analysis (ACA): a powerful tool for representing implicit knowledge of scholar knowledge workers
No full textIn the last decade, knowledge has emerged as one of the most important and valuable organizational assets. Gradually this importance caused to emergence of new discipline entitled ―knowledge management‖. However one of the major challenges of knowledge management is conversion implicit or tacit knowledge to explicit knowledge. Thus Making knowledge visible so that it can be better accessed, discussed, valued or generally managed is a long-standing objective in knowledge management. Accordingly in this paper author co- citation analysis (ACA) will be proposed as an efficient technique of knowledge visualization in academia (Scholar knowledge workers)
Semana Santa y su simbología. 5 Segunda época Año 3 (2019) enero-junio. Rutas de Campo. Trabajo de Campo: Iztapalapa: memoria y cultura
No full textLos dos grandes momentos en torno a los cuales gira la cosmovisión católica, el nacimiento de Jesús y su muerte, han dado lugar, el primero, a la celebración de la Navidad, y el segundo, a la conmemoración de Semana Santa. En este texto nos ocuparemos de los años finales de la vida de Jesús, pues es precisamente Semana Santa la celebración litúrgica con que se recuerda su Pasión y su muerte. Recordemos que, en este contexto, el término “pasión” hace referencia al sufrimiento y a la serie de tormentos a que fue sometido Jesús poco antes de su muerte en la cruz, que todos conocemos.Altamirano, Ignacio Manuel (1974). Paisajes y leyendas. Tradiciones y costumbres de México. México: Porrúa.Calendario de fiestas tradicionales (1988). México: Dirección General de Culturas Populares-SEP.Calendario Litúrgico Pastoral 1991 (1990). México: Obra Nacional de la Buena Prensa.Campos, Rubén M. (1929). El folklore literario en México. Investigación de la producción literaria popular. México: Talleres Gráficos de la Nación._____ (1958). “Semana Santa”. En Fiesta. México: Talleres de la Secretaría de Hacienda.Castelló Iturbide, María Teresa (1958). “El altar del Viernes de Dolores”. En Fiesta. México: Talleres de la Secretaría de Hacienda.Catalán Blanco, Juan Carlos (s.f.). “Las fiestas de carnestolendas y la celebración de la Semana Santa en la época colonial” [inédito]. s.l.: Dirección General de Culturas Populares de Guerrero-SEP.Cid, Carlos, y Manuel Riu (1965). Historia de las religiones. Barcelona: Sopena._____ (1987). Compendio de historia sagrada y de la historia de la Iglesia. México: Progreso.Crumrine N., Roos (1979). “Cuaresma”. En Gran Enciclopedia Rialp. Madrid: Rialp.Estrada, Genaro (1945). Visionario de la Nueva España. México: Patria.Estrada, Humberto (1985). “La cuaresma” [inédito]. s.l.: Dirección General de Culturas Populares-SEP.Foster, George M. (1962). Cultura y conquista. Xalapa: Universidad Veracruzana.García Cubas, Antonio (1945). El libro de mis recuerdos. México: Patria.González Obregón, Luis (1936). Croniquillas de la Nueva España. México: Botas.____(1941). Las calles de México. México: Botas.Horcasitas, Fernando (1974). El teatro náhuatl: época novohispana y moderna. México: IIH-UNAM.Iglesias y Cabrera, Sonia C. (1996). Tradiciones de Cuaresma y Semana Santa. México: Museo Nacional de Culturas Populares-Dirección General de Culturas Populares._____ (2001). La semana Santa en México. Con la muerte en la cruz. México: Dirección General de Culturas Populares.Lercaro, Giacomo (1960). ¿Cuál es el vocabulario de la liturgia católica? México: Novaro.Macgowan, Kenneth, y William Melnitz (1964). Las edades de oro del teatro. México: FCE.Mendieta, Gerónimo de (1945). Historia eclesiástica indiana. México: Salvador Sánchez.Mendoza, Vicente T., y Adalberto Fuentes Cruz (1945). “Drama de la Pasión intitulado: el drama del Gólgota, que se representa en la delegación de Milpa Alta, D.F.”. Anuario de la Sociedad Folklórica de México, 6.Moreno Toscano, Alejandra (1981). “La conquista espiritual”. En Historia general de México. México: El Colegio de México.Olavarría Ferrari, Enrique de (1953). “Pasión de Cristo”. En Enciclopedia de la religión católica [t. V]. Barcelona: Dalma y Jovier._____ (1961). Reseña del teatro en México. México: Porrúa.Pike E., Royston (1986). Diccionario de religiones. México: FCE.Prieto, Guillermo (1969). Memorias de mis tiempos. México: Patria.Rodríguez, Mariángela (1991). Hacia la estrella con la Pasión y la ciudad a cuestas. Semana Santa en Iztapalapa. México: Ediciones de la Casa Chata-CIESAS.Sociedad Bíblica Británica y Extranjera de Londres (1929). La Santa Biblia. Londres: SBBEL.Vetancurt, Agustín de (1941). Teatro mexicano: descripción breve de los sucesos exemplares de la Nueva España en el mundo occidental de las Indias. Madrid: J. Porrúa.Verti, Sebastián (1991). Tradiciones mexicanas. México: Diana.Weckmann, Luis (1984). La herencia medieval de México. México: FCE
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