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Aproximadamente 4191 registro(s) hasta el momento: (journal)

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Recurso libre

4151.

Metric regularity of Newton's iteration
Aragón Artacho, Francisco Javier - Dontchev, Asen L. - Gaydu, Michaël - Geoffroy, Michel H. - Veliov, Vladimir M.

Formato:	info:eu-repo/semantics/article
Enlaces:	For a version of Newton's method applied to a generalized equation with a parameter, we extend the paradigm of the Lyusternik–Graves theorem to the framework of a mapping acting from the pair “parameter-starting point” to the set of corresponding convergent…
Fecha:	2013-06-19
Recurso:	RUA Docencia

Recurso libre

4152.

Sport as a platform for values education
Acuña Delgado, Ángel - Acuña Gómez, Elena

Formato:	info:eu-repo/semantics/article
Enlaces:	Sport as a cultural fact, reflected in it the characteristics of the society in which it is immersed, but at the same time constitutes a tool with which to act on the system, a vehicle of social change capable of…
Fecha:	2012-01-04
Recurso:	RUA Docencia

Recurso libre

4153.

Using ontologies for the design of data warehouses
Pardillo Vela, Jesús - Mazón López, José Norberto

Formato:	info:eu-repo/semantics/article
Enlaces:	Obtaining an implementation of a data warehouse is a complex task that forces designers to acquire wide knowledge of the domain, thus requiring a high level of expertise and becoming it a prone-to-fail task. Based on our experience, we have…
Fecha:	2012-11-16
Recurso:	RUA Docencia

Recurso libre

4154.

Demography of two populations of the Mexican mud turtle (Kinosternon integrum) in Central Mexico
Macip-Ríos, R - Brauer-Robleda, P - Zúñiga-Veja, José Jaime - Casas-Andreu, G

Formato:	Article
Enlaces:	Basic demographic information for turtles in tropical and sub-tropical regions is still scarce. As a consequence, prospective management and conservation plans for these long-lived vertebrates lack the necessary quantitative background for successful implementation. In this study, we used capture-mark-recapture techniques…
Fecha:	2013-04-05
Recurso:	Facultad de Ciencias - UNAM

Recurso libre

4155.

Estimating potential reproductive costs in the survival of a xenosaurid lizard
Zúñiga-Vega, José Jaime

Formato:	Article
Enlaces:	Both females and males may suffer from increased mortality risk as a result of the activities and physiological processes associated with reproduction. In this study I estimated sex-specific reproductive costs in the survival rates of a viviparous and territorial lizard…
Fecha:	2013-04-05
Recurso:	Facultad de Ciencias - UNAM

Recurso libre

4156.

The X-ray quiescence of Swift J195509.6+261406 (GRB 070610): an optical bursting X-ray binary?
Rea, Nanda - Jonker, Peter G. - Nelemans, Gijs - Pons Botella, José Antonio - Kasliwal, Mansi M. - Kulkarni, Shrinivas R. - Wijnands, Rudy

Formato:	info:eu-repo/semantics/article
Enlaces:	We report on an ~63 ks Chandra observation of the X-ray transient Swift J195509.6+261406 discovered as the afterglow of what was first believed to be a long-duration gamma-ray burst (GRB 070610). The outburst of this source was characterized by unique…
Fecha:	2013-11-14
Recurso:	RUA Docencia

Recurso libre

4157.

Volleyball coaches behavior assessment through systematic observation
Zetou, Eleni - Amprasi, Evagelia - Michalopoulou, Maria - Aggelousis, Nikolaos

Formato:	info:eu-repo/semantics/article
Enlaces:	The purpose of this study was to record and evaluate the practice behaviors of 12 Greek Volleyball National Division coaches, mean age 47.36 (SD=6.1) through feedback that they provided to their athletes throughout the 2010-11 seasons. Verbal and non verbal…
Fecha:	2012-01-04
Recurso:	RUA Docencia

Recurso libre

4158.

Static and dynamic balance in young athletes
Ricotti, Leonardo

Formato:	info:eu-repo/semantics/article
Enlaces:	The creation of a mature athlete necessarily passes through the expression of his potential during each phase of his development. Young athletes' trainers often neglect specific balance programs, above all in certain sports (e.g. soccer) where balance is poorly considered,…
Fecha:	2012-01-04
Recurso:	RUA Docencia

Recurso libre

4159.

Application of the discussion groups and initial phases of the qfd methodology to the study of Valencian ball trinquetes
Montaner Sesmero, Ana M. - Montaner Sesmero, Carlos - Pérez Soriano, Pedro - Carrasco Embuena, Vicente - Llana Belloch, Salvador

Formato:	info:eu-repo/semantics/article
Enlaces:	The purpose of this research is to show an opinion study about the specifications that the Valencian ball trinquetes should have according to the players' opinion. The valencian ball game is a native sport with a great cultural tradition in…
Fecha:	2012-01-04
Recurso:	RUA Docencia

Recurso libre

4160.

International resistance training recommendations for older adults: implications for the promotion of healthy aging in Spain
Romo Pérez, Vicente - Schwingel, Andiara - Chodzko-Zajko, Wojtek

Formato:	info:eu-repo/semantics/article
Enlaces:	The publication of the American College of Sport Medicine (ACSM) Position Stand on Physical Activity and Exercise for Older Adults and the release of the US Government Physical Activity Guidelines for Americans have emphasized the need for the development of…
Fecha:	2012-01-04
Recurso:	RUA Docencia

Recurso libre

4161.

Predictors of quality of life in children
Borras, Pere A. - Vidal, Josep - Ponseti, Xavier - Cantallops, Jaume - Palou, Pere

Formato:	info:eu-repo/semantics/article
Enlaces:	The aim of this study was to explore the relationship between Health related quality of life (HRQoL) in children reported by parents, cardiorespiratory fitness, physical activity levels, screen time and body mass index of a population of 302 eleven and…
Fecha:	2012-01-04
Recurso:	RUA Docencia

Recurso libre

4162.

Age and gender differences in Body Mass Index, ocular, and back disorders in 8-12-year old children
Zurita Ortega, Félix - Cepero González, Mar - Ruiz Rodríguez, Luis - Linares Girela, Daniel - Cachón Zagalaz, Javier - Zurita Molina, Félix

Formato:	info:eu-repo/semantics/article
Enlaces:	The influence of sedentarism on the increase in obesity can now be confirmed. In this sense, attention should be paid to the importance of those working in school environments. The sample group was made up of 2,956 participants from 19…
Fecha:	2012-01-11
Recurso:	RUA Docencia

Recurso libre

4163.

Benjamin, BitTorrent, Bootlegs: auratic piracy cultures?
Rodríguez Ferrándiz, Raúl

Formato:	info:eu-repo/semantics/article
Enlaces:	Seventy-five years ago, Walter Benjamin showed us that the line between "production" and "reproduction" had begun to blur. Reproduction was no longer optional, consequential and degrading (the shredding of the original’s aura), but was instead being transformed into a principle…
Fecha:	2012-04-23
Recurso:	RUA Docencia

Recurso libre

4164.

A unified theory of structural change
Guilló Fuentes, María Dolores - Papageorgiou, Chris - Pérez Sebastián, Fidel

Formato:	info:eu-repo/semantics/article
Enlaces:	This paper uses dynamic general equilibrium and computational methods, inspired by the multi-sector growth model structure in Stephen Turnovsky's work, to develop a theory that unifies two of the traditional explanations of structural change: sector-biased technical change and non-homothetic preferences.…
Fecha:	2012-07-30
Recurso:	RUA Docencia

Recurso libre

4165.

Energy-loss straggling study of proton and alpha-particle beams incident onto ZrO2 and Al2O2 films
Behar, Moni - Fadanelli, Raúl C. - Abril Sánchez, Isabel - García Molina, Rafael - Nagamine, Luiz C.C.M.

Formato:	info:eu-repo/semantics/article
Enlaces:	The energy-loss straggling of zirconia (ZrO2) and alumina (Al2O3) has been experimentally determined for proton and alpha-particle beams mainly by means of the Rutherford backscattering technique and in some few cases using the transmission method. The incident energies of the…
Fecha:	2012-11-29
Recurso:	RUA Docencia

Recurso libre

4166.

Environmental changes during secondary succession in a tropical dry forest in Mexico
Lebrija-Trejos, E - Pérez-García, Eduardo Alberto - Meave del Castillo, Jorge Arturo - Poorter, L - Bongers, F

Formato:	Article
Enlaces:	Vegetation and environment change mutually during secondary succession, yet the idiosyncrasies of the vegetation effect on the understorey environment are poorly understood. To test whether the successional understorey environment changes predictably and is shaped by the structure and seasonality of…
Fecha:	2012-10-03
Recurso:	Facultad de Ciencias - UNAM

Recurso libre

4167.

Demographic consequences of chronic anthropogenic disturbance on three populations of the endangered globose cactus Coryphantha werdermannii
Portilla-Alonso, RM - Martorell-Delgado, Carlos

Formato:	Article
Enlaces:	Cacti are thought to be highly vulnerable to chronic anthropogenic disturbance (CAD). To assess its effects, we modeled the dynamics of three populations of the endangered cactus Coryphantha werdermannii exposed to different intensities of disturbance. Because no seedlings germinated and…
Fecha:	2013-04-05
Recurso:	Facultad de Ciencias - UNAM

Recurso libre

4168.

Pattern of root colonization by arbuscular mycorrhizal fungi in Verbesina virgata and their effects on plant growth and leaf physical attributes
Vega-Frutis, R - Sánchez-Gallen, Irene - Guadarrama-Chávez, María Patricia - Sandoval-González, I - Castillo-Argüero, Silvia

Formato:	Article
Enlaces:	Verbesina virgata (Asteraceae) is the stable food of generalist herbivores in xerophytic vegetation of southern Mexico City where nitrogen and phosphorous are limiting soil resources for plant growth and therefore it is likely that arbuscular mycorrhizal fungi play an important…
Fecha:	2013-04-05
Recurso:	Facultad de Ciencias - UNAM

Recurso libre

4169.

Morphological and reproductive variation among populations of the Pacific molly Poecilia butleri
Zúñiga-Vega, José Jaime - Suárez-Rodríguez, M - Espinosa-Pérez, H - Johnson, JB

Formato:	Article
Enlaces:	In viviparous organisms, pregnant females typically experience an increase in body mass and body volume. In this study, the prediction that variation in reproductive traits among populations of viviparous organisms should be related to variation among populations in body shape…
Fecha:	2013-04-05
Recurso:	Facultad de Ciencias - UNAM

Recurso libre

4170.

Nanonization of megestrol acetate by laser fragmentation in aqueous milieu
Sylvestre, Jean-Philippe - Tang, Marie-Christine - Furtos, Alexandra - Leclair, Grégoire - Meunier, Michel - Leroux, Jean-Christophe

Formato:	Article
Enlaces:	Nanonization is a simple and effective method to improve dissolution rate and oral bioavailability of drugs with poor water solubility. There is growing interest to downscale the nanocrystal production to enable early preclinical evaluation of new drug candidates when compound…
Fecha:	2013-05-01
Recurso:	Université de Montreal

Recurso libre

4171.

Development of a unified FDTD-FEM library for electromagnetic analysis with CPU and GPU computing
Francés Monllor, Jorge - Bleda Pérez, Sergio - Gallego Rico, Sergi - Neipp López, Cristian - Márquez Ruiz, Andrés - Pascual Villalobos, Inmaculada - Beléndez Vázquez, Augusto

Formato:	info:eu-repo/semantics/article
Enlaces:	The present paper describes an optimized C++ library for the study of electromagnetics. The implementation is based on the Finite-Difference Time-Domain method for transient analysis, and the Finite Element Method for electrostatics. Both methods share the same core and are…
Fecha:	2013-05-07
Recurso:	RUA Docencia

Recurso libre

4172.

Enhanced metric regularity and Lipschitzian properties of variational systems
Aragón Artacho, Francisco Javier - Mordukhovich, Boris S.

Formato:	info:eu-repo/semantics/article
Enlaces:	This paper mainly concerns the study of a large class of variational systems governed by parametric generalized equations, which encompass variational and hemivariational inequalities, complementarity problems, first-order optimality conditions, and other optimization-related models important for optimization theory and applications. An…
Fecha:	2013-06-19
Recurso:	RUA Docencia

Recurso libre

4173.

Cross-category demand effects of price promotions
Leeflang, Peter S.H. - Parreño Selva, Josefa

Formato:	info:eu-repo/semantics/article
Enlaces:	Do promotions in a certain category lead to higher revenues in other categories? If so, to what degree? The answers to these questions are highly relevant for retailers that supply products in different categories. Empirical findings in studies that consider…
Fecha:	2013-10-17
Recurso:	RUA Docencia

Recurso libre

4174.

Is SGR 0418+5729 indeed a waning magnetar?
Turolla, Roberto - Zane, Silvia - Pons Botella, José Antonio - Esposito, Paolo - Rea, Nanda

Formato:	info:eu-repo/semantics/article
Enlaces:	SGR 0418+5729 is a transient soft gamma-ray repeater which underwent a major outburst in 2009 June, during which the emission of short bursts was observed. Its properties appeared quite typical of other sources of the same class until long-term X-ray…
Fecha:	2013-11-14
Recurso:	RUA Docencia

Recurso libre

4175.

Effect of the size of the pupae, adult diet, oviposition substrate and adult population density on egg production in Musca domestica (Diptera: Muscidae)
Pastor Monllor, Berta - Čičková, Helena - Kozánek, Milan - Martínez Sánchez, Ana Isabel - Takáč, Peter - Rojo Velasco, Santos

Formato:	info:eu-repo/semantics/article
Enlaces:	In order to enhance the mass production of the house fly, Musca domestica, five aspects of its oviposition biology were analyzed. Oviposition substrate and the manner of its presentation, the composition of the diet of the adults, size of the…
Fecha:	2013-11-29
Recurso:	RUA Docencia

Recurso libre

4176.

Game rhythm and stoppages in soccer: a case study from Spain
Hernández Moreno, José - Gómez Rijo, Antonio - Castro, Ulises - González Molina, Antonio - Quiroga, Miriam E. - González Romero, Francisco

Formato:	info:eu-repo/semantics/article
Enlaces:	The purpose of this paper was to quantify and analyze the participation/pause game times and stoppages of 11-a-side soccer. A total of 617 players of 44 Spanish men's teams and 33 matches of the 2007/08 and 2008/09 men's soccer players…
Fecha:	2012-01-04
Recurso:	RUA Docencia

Recurso libre

4177.

Effects of combined electrostimulation and plyometric training on vertical jump and speed tests
Benito Martínez, Elisa - Lara Sánchez, Amador J. - Berdejo del Fresno, Daniel - Martínez López, Emilio J.

Formato:	info:eu-repo/semantics/article
Enlaces:	The aim of this study was to determine the performance evolution of a group of athletes after 8 weeks of training that combined electrostimulation (NM ES) and plyometrics (PT). 78 medium level sprinter athletes participated, 40 women and 38 men…
Fecha:	2012-01-04
Recurso:	RUA Docencia

Recurso libre

4178.

The comparison of competitive balance in Football Premier Leagues of England, Germany, Spain, France, Italy and Iran: a case study from 2009-2010 Season
Naghshbandi, Salah - Yousefi, Bahram - Etemad, Zaher - Moradi, Mehdi

Formato:	info:eu-repo/semantics/article
Enlaces:	Most sports are attractive because they are almost unpredictable. The more the competitiveness of league teams, the harder to predict the games and as a result, that league will be more attractive. Competitive balance refers to the balance in sport…
Fecha:	2012-01-11
Recurso:	RUA Docencia

Recurso libre

4179.

Evaluation of hybrid and distance education learning environments in Spain
Ferrer Cascales, Rosario Isabel - Walker, Scott L. - Reig Ferrer, Abilio - Fernández Pascual, María Dolores - Albaladejo Blázquez, Natalia

Formato:	info:eu-repo/semantics/article
Enlaces:	This article describes the adaptation and validation of the Distance Education Learning Environments Survey (DELES) for use in investigating the qualities found in distance and hybrid education psycho-social learning environments in Spain. As Europe moves toward post-secondary student mobility, equanimity…
Fecha:	2012-11-06
Recurso:	RUA Docencia

Recurso libre

4180.

Inelastic scattering of electron and light ion beams in organic polymers
Vera Gomis, Pablo de - Abril Sánchez, Isabel - García Molina, Rafael

Formato:	info:eu-repo/semantics/article
Enlaces:	We have calculated the inelastic mean free path, stopping power, and energy-loss straggling of swift electron, proton, and α-particle beams in a broad incident energy range in four organic polymers: poly(methyl methacrylate) (PMMA), Kapton, polyacetylene (PA), and poly(2-vinylpyridine) (P2VP). These…
Fecha:	2012-11-29
Recurso:	RUA Docencia

Recurso libre

4181.

Simple model of bulk and surface excitation effects to inelastic scattering in low-energy electron beam irradiation of multi-walled carbon nanotubes
Kyriakou, Ioanna - Emfietzoglou, Dimitris - García Molina, Rafael - Abril Sánchez, Isabel - Kostarelos, Kostas

Formato:	info:eu-repo/semantics/article
Enlaces:	The effect of bulk and surface excitations to inelastic scattering in low-energy electron beam irradiation of multi-walled carbon nanotubes (MWNTs) is studied using the dielectric formalism. Calculations are based on a semiempirical dielectric response function for MWCNTs determined by means…
Fecha:	2012-11-29
Recurso:	RUA Docencia

Recurso libre

4182.

Tropical montane cloud forests: current threats and opportunities for their conservation and sustainable management in Mexico
Toledo-Aceves, T - Meave del Castillo, Jorge Arturo - González-Espinosa, M - Ramírez-Marcial, N

Formato:	Article
Enlaces:	Tropical montane cloud forests (TMCF) are among the most threatened ecosystems globally in spite of their high strategic value for sustainable development due to the key role played by these forests in hydrological cycle maintenance and as reservoirs of endemic…
Fecha:	2012-10-03
Recurso:	Facultad de Ciencias - UNAM

Recurso libre

4183.

Bcl-xL deamidation in oncogenic tyrosine kinase signalling
Zhao, Rui

Formato:	Thesis
Enlaces:	I have been interested in the molecular mechanisms of Haematopoietic malignant diseases such as leukaemia and lymphoma, especially those involving oncogenic tyrosine kinases. About 30 of the 90 tyrosine kinases in the human genome have been implicated in cancer (Blume-Jensen…
Fecha:	2012-02-29
Recurso:	Anglia Ruskin University

Recurso libre

4184.

Cancer mortality inequalities in urban areas: a Bayesian small area analysis in Spanish cities
Puigpinós-Riera, Rosa - Marí-Dell'Olmo, Marc - Gotsens, Mercè - Borrell, Carme - Serral, Gemma - Ascaso, Carlos - Calvo, Montse - Daponte, Antonio - Domínguez Berjón, María Felicitas - Esnaola, Santiago - Gandarillas, Ana - López-Abente, Gonzalo - Martos, Carmen - Martínez-Beneito, Miguel A. - Montes-Martínez, Agustín - Montoya, Imanol - Nolasco Bonmatí, Andreu - Pasarín, Isabel M. - Rodríguez-Sanz, Maica - Sáez, Marc - Sánchez-Villegas, Pablo

Formato:	info:eu-repo/semantics/article
Enlaces:	Background: Intra-urban inequalities in mortality have been infrequently analysed in European contexts. The aim of the present study was to analyse patterns of cancer mortality and their relationship with socioeconomic deprivation in small areas in 11 Spanish cities. Methods: It…
Fecha:	2013-10-15
Recurso:	RUA Docencia

Recurso libre

4185.

Astrophysical parameters of LS 2883 and implications for the PSR B1259-63 gamma-ray binary
Negueruela Díez, Ignacio - Ribó, Marc - Herrero, Artemio - Lorenzo, Javier - Khangulyan, Dmitry - Aharonian, Felix A.

Formato:	info:eu-repo/semantics/article
Enlaces:	Only a few binary systems with compact objects display TeV emission. The physical properties of the companion stars represent basic input for understanding the physical mechanisms behind the particle acceleration, emission, and absorption processes in these so-called gamma-ray binaries. Here…
Fecha:	2013-11-13
Recurso:	RUA Docencia

Recurso libre

4186.

The Canada-France Ecliptic Plane Survey—full data release: the orbital structure of the Kuiper Belt
Petit, Jean-Marc - Kavelaars, J. John - Gladman, Brett J. - Jones, R. Lynne - Parker, Joel Wm. - Van Laerhoven, Christa - Nicholson, Phil - Mars, Gilbert - Rousselot, Philippe - Mousis, Olivier - Marsden, Brian - Bieryla, Allyson - Taylor, Matthew - Ashby, Matthew L.N. - Benavídez, Paula Gabriela - Campo Bagatín, Adriano - Bernabeu Pastor, José Guillermo

Formato:	info:eu-repo/semantics/article
Enlaces:	We report the orbital distribution of the trans-Neptunian objects (TNOs) discovered during the Canada-France Ecliptic Plane Survey (CFEPS), whose discovery phase ran from early 2003 until early 2007. The follow-up observations started just after the first discoveries and extended until…
Fecha:	2013-11-13
Recurso:	RUA Docencia

Recurso libre

4187.

Sampling scarab beetles in tropical forests: the effect of light source and night sampling periods
García López, Alejandra - Micó Balaguer, Estefanía - Zumbado, Manuel A. - Galante Patiño, Eduardo

Formato:	info:eu-repo/semantics/article
Enlaces:	Light traps have been used widely to sample insect abundance and diversity, but their performance for sampling scarab beetles in tropical forests based on light source type and sampling hours throughout the night has not been evaluated. The efficiency of…
Fecha:	2013-11-26
Recurso:	RUA Docencia

Recurso libre

4188.

Some activities on educational technology innovation in Physics, optics and telecommunications
Arribas Garde, Enrique - Beléndez Vázquez, Augusto - Nájera López, Alberto - Márquez Ruiz, Andrés - Villalba Montoya, José Manuel - Gallego Rico, Sergi - Ortuño Sánchez, Manuel - Francés Monllor, Jorge - Álvarez López, Mariela Lázara - Neipp López, Cristian - Pascual Villalobos, Inmaculada

Formato:	info:eu-repo/semantics/article
Enlaces:	The use of innovative technologies in education offers new possibilities that complement classroom teaching and may also help to improve the quality of education, enabling students to actively participate in the learning process. With this in mind, in 2009 the…
Fecha:	2012-10-01
Recurso:	RUA Docencia

Recurso libre

4189.

A reassessment of traditional lexicographical tools in the light of new corpora: sports Anglicisms in Spanish
Balteiro Fernández, Isabel

Formato:	info:eu-repo/semantics/article
Enlaces:	There is no question nowadays as to the international and powerful status of English at a global scale and, consequently, as to its presence in non-English speaking countries at different levels. Linguistically speaking, English is one of the languages which…
Fecha:	2012-12-14
Recurso:	RUA Docencia

Recurso libre

4190.

Temporal patterns of memory source incorporations into dreams and their relationships to dreamed locus of control
Solomonova, Elizaveta

Formato:	Thèse ou Mémoire numérique / Electronic Thesis or Dissertation
Enlaces:	Les incorporations des mémoires épisodiques dans les rêves apparaissent en formes fragmentées et suivent un modèle temporel distinct qui suit une courbe sinusoïdale. Ce modèle est caractérisé par les incorporations immédiates, qui apparaissent 1-2 jours après l’événement (effet de résidus…
Fecha:	2012-03-26
Recurso:	Université de Montreal

Recurso libre

4191.

Biostratigraphy and paleobiogeographic affinities of the Jurassic brachiopod assemblages from Sierra Espuña (Maláguide Complex, Internal Betic Zones, Spain), Bioestratigrafía y afinidades paleobiogeográficas de las asociaciones de braquiópodos jurásicos de Sierra Espuña (Maláguide, Zonas Internas Béticas, España)
Baeza Carratalá, José Francisco - García Joral, Fernando - Tent Manclús, José Enrique

Formato:	info:eu-repo/semantics/article
Enlaces:	The assemblages of Early Jurassic brachiopods (Pliensbachian - Toarcian) from Sierra Espuña (Murcia Province, SE Spain) are described. This is the only area in the Internal Zones of the Betic Cordillera, corresponding to the margins of the Alborán Terrane, where…
Fecha:	2013-06-28
Recurso:	RUA Docencia