1,356,793 research outputs found
Correction to: BRG1 regulation by miR-155 in human leukemia and lymphoma cell lines.
No full textFollowing the publication of the original article the author listed as Antonio Herrera contacted the Publisher to state that his correct and full name is Antonio Herrera-Merchan. Antonio Herrera-Merchan has agreed to the publication of this erratum
A novel experimental model and a drag-optimal allocation method for variable-pitch propellers in multirotors
No full textThis paper proposes a new mathematical model to map the rotational speed and angle of attack (pitch) of small-size propellers typically used in multirotors and the aerodynamic thrust force and drag moment produced by the propeller itself. The new model is inspired by standard models using the blade-element and momentum theories, which have been suitably modified in order to allow for explicit fast computation of the direct and inverse map (useful for high-frequency control) and obtain a better adherence to experimental data. The new model allows and captures all the main nonlinear characteristics of the thrust/drag generation. An extensive experimental comparison shows that the prediction capability of the proposed model outperforms the most commonly used models at date. In the second part of the paper, two optimization methods are proposed in order to exploit the redundancy of the inputs of variable-pitch propellers to decrease the power consumption due to the drag dissipation. The first method deals with the optimal allocation for thrust generation on a single propeller, while the second method is aimed at solving the optimal allocation of the rotational speed and pitch of all the propellers in a multi-rotor with any number of propellers. Simulations results show the viability and effectiveness of the proposed methods
[Lectionarium officii]
No full textEl nombre del impresor consta en colofónSignaturas: [ ]4, A-Z6, 2A-2N6, 2O4, A-D6, E2Texto a dos columnasPortada con orla tipográfica y grabado calcografiadoPortada y texto a dos tintasIllustraciones calcografiada
La opción solidaria y la práctica empresarial de la gestión comercializadora de camarón
No full textInicio de Cmari (1.981-1.986). Funcionamiento de Camari. Vision de los sectores vinculados a Camari. Fortalezas y deblidades de Camari. Conclusiones y Recomendaciones. Bibliografia y Anexos
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe 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
Variations on the Author
No full text“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
Model of preventive maintenance plan for the valorcon company volleyfront fleet *
No full textEl Modelo de Plan de Mantenimiento Preventivo que se presenta, busca ser una ayuda valiosa y un inicio fundamental mejores prácticas de mantenimiento dentro de la organización, se entiende que el mantenimiento preventivo pretende mantener en un mejor estado los equipos mediante acciones programadas buscando siempre anticiparse a fallos o paradas de equipos por desperfectos repentinos que pueden ser anticipados, todo lo anterior incide directamente en dos factores fundamentales que se desean afectar positivamente. 1. Reducir los costos de mantenimiento, este es el factor principal a tener en cuenta con la presentación del modelo de mantenimiento preventivo, trabajando sobre cada uno de los actores que interviene en el incremento innecesario de este rubro. 2. Conservación de los equipos en buen estado, un valor significativo de los activos de la empresa está representado en sus más de 600 equipos, de ahí la importancia de mantener su condición de la mejor forma posible a partir de adecuadas prácticas de mantenimiento reduciendo al máximo posible su depreciación por condición. Se pretende que el modelo presentado sea específico para las necesidades de VALORCON S.A, de fácil aplicación y que pueda utilizar la experiencia de más de 30 años del grupo de mantenimiento acoplando medios y métodos más actuales con mayor trazabilidad, con el fin de hacer mucho más eficientes y eficaces los procedimientos, siempre teniendo en cuenta las directrices y recomendaciones de los fabricantes de los equipos. *Monografía de grado ** Facultad de Ingenierías Fisicomecánicas. Escuela de Ingeniería Mecánica. Especialización en Gerencia de Mantenimiento. Ing. Samuel Rodriguez MerchanEspecializaciónEspecialista en Gerencia de MantenimientoThe Model of Preventive Maintenance wants to be a valuable help and a start fundamentals better practice of Maintenance in the organization, we understood that Preventive Maintenance looking keep the equipment in a better condition by means of programmed actions, always seeking to anticipate failures or equipment stops due to sudden damage like that can be anticipated, all of the above impact direct on two fundamental factors that we wish to affect in a way positive. 1. Reduce Maintenance cost, this is the most important factor to take in the Model of Preventive Maintenance, working with all actors involved in the unnecessary increase of this item. 2. f the company is represented in all equipment, there is more than 600, this is the most important way to make an appropriate Maintenance practices by reducing the maximum possible depreciation for condition. We intend that the model presented to specific apply and implement their experience because is more than 30 years of experience on Maintenance group coupling ways and methods whit greater traceability, we find to be more efficient and effective in procedures, choose always the guidelines and recommendations of the equipment manufacturers. *Monograph: Faculty of Physicomechanical Engineering. School of Mechanical Engineering. Specialization in Maintenance Management. Ing. Samuel Rodrigue
Appropriate Similarity Measures for Author Cocitation Analysis
No full textWe 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
Tractado de las causas y curacion de las fiebres con secas pestilenciales que han oprimido à Valladolid, y otras ciudades de España ...
No full textCopia digital : Google BooksColofónMarca tip. en portSign.: []\p8\s, []\p8\s, A-R\p8\s, S\p6\sHojas impresas por ambas cara
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