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Search Results: 1 - 10 of 306242 matches for " Ortu?o Pérez "
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La caza mayor y le economía rural en la provincia de Toledo
Martín Fernández, ángel Julián,Ortuo Pérez, Sigfredo Francisco
Estudios Geográficos , 2004,
Abstract: Leisure or business? Is it the hunt a really profitable activity? If it is like that, who are the biggest beneficiaries? How it has influenced in the most disadvantaged rural zones? Here there are some of the questions about economic and social reality of hunting, and its answers are tried to be approached in this work, for a confirmed hunting tradition zone as Los Montes de Toledo , in the province of the same name, where are placed the most of the best major hunting areas in the Toledo province. The Mounts of Toledo, due to its excellent natural resources for the hunting and to the crisis of the agrarian traditional utilizations, constitute an area where the major hunt is the most adapted use to contribute to the biological balance with a rational management. [es] Ocio o negocio?, es la caza una actividad verdaderamente rentable? Si es así, quiénes son los mayores beneficiarios?, cómo repercute en las zonas rurales más desfavorecidas? Estas son algunas de las cuestiones que la caza, como realidad económica y social, plantea, y cuyas respuestas se pretende abordar en este trabajo desarrollado en una zona de contrastada tradición cinegética como es la comarca de los Montes de Toledo en la provincia del mismo nombre, como lo demuestra el hecho de que la mayor parte de los cotos de caza mayor de la provincia de Toledo, se hallen en esta comarca. Los Montes de Toledo debido a sus excelentes recursos naturales para la caza y a la crisis de los aprovechamientos agrarios tradicionales, constituyen un espacio en el que la práctica de la caza mayor, es el uso más adecuado para contribuir a la conservación del equilibrio biológico, siempre que este aprovechamiento se realice racionalmente. [fr] Loisir ou affaire? Est-ce que la chasse est une activité vraiment rentable? Le cas échéant, qui sont leur principaux bénéficiaires?, quelles sont leur conséquences dans les espaces ruraux les plus défavorisés? Ce sont quelques-unes des questions que la chasse pose en tant que réalité économique et sociale, et dont on essaie d'aborder leurs réponses dans ce travail, qu'a été développé dans une zone qui compte sur une longue tradition cynégétique, telle que les Montes de Toledo, dans la province de Toledo, d'après le fait que la plupart des chasse gardées se sont concentrées dans ce pays. Compte tenu de leur excellents ressources naturels pour la chasse, et de la crise des systèmes d'aménagement rural traditionnels, les Montes de Toledo sont l'un des espaces où la chasse de gros gibier c'est l'une des utilisations les plus convenables pour la conservation de l'équilibr
Estimación del aprovechamiento máximo sostenible y distribución diamétrica estable de masas irregulares de pinus nigra mediante modelos matriciales
López Torres,Ignacio; Ortuo Pérez,Sigfredo Francisco; Martín Fernández,ángel Julián; Fullana Belda,Carmen;
Interciencia , 2008,
Abstract: a matrix model is presented for the projection in time and maximal profiting that ensures sustainability and stability of diameter distributions of three qualities of pinus nigra. considering projection periods of 10 years, trunks were grouped in five diameter classes: 0-10, 10-20, 20-30, 30-40 and >40cm. transition probabilities were calculated adjusting diameter growth curves by cubic approximations and assuming uniform diameter distributions within each class. a condition is proposed for the sustainable management of the tree mass that permits to reach and maintain in time a stable diameter distribution. the results indicate that, in order to ensure population sustainability/stability, for each projection time interval the maximal extraction rate should be between 17.21 and 40.09%, depending on quality level, for recruitments between 200 and 840 trunks/ha and total sectional areas of 20 to 30m2·ha-1. finally, for each quality level the stable diameter distributions in relation to recruitment for total sectional areas of 20, 25 and 30m2·ha-1 were obtained.
Are the Economically Optimal Harvesting Strategies of Uneven-Aged Pinus nigra Stands Always Sustainable and Stabilizing?
Ignacio López-Torres,Sigfredo Ortuo-Pérez,Fernando García-Robredo,Carmen Fullana-Belda
Forests , 2013, DOI: 10.3390/f4040830
Abstract: Traditional uneven-aged forest management seeks a balance between equilibrium stand structure and economic profitability, which often leads to harvesting strategies concentrated in the larger diameter classes. The sustainability (i.e., population persistence over time) and influence of such economically optimal strategies on the equilibrium position of a stand (given by the stable diameter distribution) have not been sufficiently investigated in prior forest literature. This article therefore proposes a discrete optimal control model to analyze the sustainability and stability of the economically optimal harvesting strategies of uneven-aged Pinus nigra stands. For this model, we rely on an objective function that integrates financial data of harvesting operations with a projection matrix model that can describe the population dynamics. The model solution reveals the optimal management schedules for a wide variety of scenarios. To measure the distance between the stable diameter distribution and the economically optimal harvesting strategy distribution, the model uses Keyfitz’s delta, which returns high values for all the scenarios and, thus, suggests that those economically optimal harvesting strategies have an unstabilizing influence on the equilibrium positions. Moreover, the economically optimal harvesting strategies were unsustainable for all the scenarios.
Coulomb glass simulations: Creation of a set of low-energy many-particle states, non-ergodic effects in the specific heat
A. D{\'?}az-Sánchez,A. M?bius,M. Ortuo,A. Pérez-Garrido,M. Schreiber
Physics , 1997, DOI: 10.1002/(SICI)1521-3951(199801)205:1<17::AID-PSSB17>3.3.CO;2-U
Abstract: We have implemented a new numerical method to obtain the low-energy many-particle states of the Coulomb glass. First, this method creates an initial set of low-energy states by a hybrid of local search and simulated annealing approaches. Then, systematically investigating the surroundings of the states found, this set is completed. The transition rates between these states are calculated. The connectivity of the corresponding graph is analysed in dependence on temperature and duration of measurement. We study how the formation of clusters is reflected in the specific heat as non-ergodic effects.
Perfil epidemiológico de las enfermedades profesionales en Alicante, 2002-2005
Berenguer-Ortuo,Senén; Agudelo-Suárez,Andrés A.; Roél-Valdés,José María; Ronda-Pérez,Elena;
Medicina y Seguridad del Trabajo , 2009, DOI: 10.4321/S0465-546X2009000100007
Abstract: objective: describe the epidemiological pattern of the occupational diseases in the province of alicante between 2002-2005. methods: cross-sectional study. the source of information comes from the reports of the occupational diseases registration notified in alicante 2002-2005. the diseases have been included upper limb musculoskeletal disorders (ul-msd), dermatitis and asthma. as working and personal factors have been considered age, sex, occupation, firm size and length of employment. the incidence rates were estimated, using workers report of alicante, and the reasons for incidence with the confidence intervals yours (ci 95%) for the different variables considered. results: 645 cases of occupational diseases were recorded, of which 607 was for the selected pathologies with an incidence of 22.67 cases per 100,000 workers. 525 are of ul-msd, 68 of dermatitis and 14 of asthma. conclusions: the ul-msd represents the main occupational diseases declared in alicante. there are differences among three groups of occupational diseases between 2002-2005 in alicante, according to sex, age, economical activity of company and the labour antiquity.
Perfil epidemiológico de las enfermedades profesionales en Alicante, 2002-2005 Epidemiological profile of occupational diseases in Alicante, 2002-2005
Senén Berenguer-Ortuo,Andrés A. Agudelo-Suárez,José María Roél-Valdés,Elena Ronda-Pérez
Medicina y Seguridad del Trabajo , 2009,
Abstract: Objetivo: Describir el patrón epidemiológico de las enfermedades profesionales (EEPP) en la provincia de Alicante entre los a os 2002-2005. Métodos: Estudio transversal. La fuente de información procede de los partes del registro de EEPP notificadas en Alicante. Las enfermedades incluidas han sido los trastornos musculoesqueléticos (TME) del miembro superior, dermatitis y asma. Como factores laborales y personales se han considerado la edad, el sexo, el puesto de trabajo, el tama o de la empresa, y la antigüedad laboral. Se han estimado las tasas de incidencia utilizando los datos de población ocupada de la provincia, así como las razones de incidencia con los intervalos de confianza al 95% (IC 95%) para las distintas variables consideradas. Resultados: Se registraron 645 casos de EEPP, de éstas 607 corresponden a las patologías seleccionadas con una incidencia de 22,67 casos por 100.000 trabajadores. 525 son TME del miembro superior, 68 dermatitis y 14 de asma. Conclusiones: Los TME del miembro superior representan en la provincia de Alicante la principal EEPP declarada. Se observan diferencias entre los tres grupos de EEPP en Alicante entre 2002-2005, según sexo, edad, actividad económica de la empresa y antigüedad en el puesto de trabajo. Objective: Describe the epidemiological pattern of the occupational diseases in the province of Alicante between 2002-2005. Methods: Cross-sectional study. The source of information comes from the reports of the occupational diseases registration notified in Alicante 2002-2005. The diseases have been included upper limb musculoskeletal disorders (UL-MSD), dermatitis and asthma. As working and personal factors have been considered age, sex, occupation, firm size and length of employment. The incidence rates were estimated, using workers report of Alicante, and the reasons for incidence with the confidence intervals yours (CI 95%) for the different variables considered. Results: 645 cases of occupational diseases were recorded, of which 607 was for the selected pathologies with an incidence of 22.67 cases per 100,000 workers. 525 are of UL-MSD, 68 of Dermatitis and 14 of Asthma. Conclusions: The UL-MSD represents the main occupational diseases declared in Alicante. There are differences among three groups of occupational diseases between 2002-2005 in Alicante, according to sex, age, economical activity of company and the labour antiquity.
The “Alluvial Mesovoid Shallow Substratum”, a New Subterranean Habitat
Vicente M. Ortuo, José D. Gilgado, Alberto Jiménez-Valverde, Alberto Sendra, Gonzalo Pérez-Suárez, Juan J. Herrero-Borgo?ón
PLOS ONE , 2013, DOI: 10.1371/journal.pone.0076311
Abstract: In this paper we describe a new type of subterranean habitat associated with dry watercourses in the Eastern Iberian Peninsula, the “Alluvial Mesovoid Shallow Substratum” (alluvial MSS). Historical observations and data from field sampling specially designed to study MSS fauna in the streambeds of temporary watercourses support the description of this new habitat. To conduct the sampling, 16 subterranean sampling devices were placed in a region of Eastern Spain. The traps were operated for 12 months and temperature and relative humidity data were recorded to characterise the habitat. A large number of species was captured, many of which belonged to the arthropod group, with marked hygrophilous, geophilic, lucifugous and mesothermal habits. In addition, there was also a substantial number of species showing markedly ripicolous traits. The results confirm that the network of spaces which forms in alluvial deposits of temporary watercourses merits the category of habitat, and here we propose the name of “alluvial MSS”. The “alluvial MSS” may be covered or not by a layer of soil, is extremely damp, provides a buffer against above ground temperatures and is aphotic. In addition, compared to other types of MSS, it is a very unstable habitat. It is possible that the “alluvial MSS” may be found in other areas of the world with strongly seasonal climatic regimes, and could play an important role as a biogeographic corridor and as a refuge from climatic changes.
Preservación con Celsior en trasplante renal: Nuestra experiencia
Pérez Sanz,P.; Burgos Revilla,F.J.; Marcén Letosa,R.; Pascual Santos,J.; Merino Rivas,J.L.; Ortuo Mirete,J.;
Actas Urológicas Espa?olas , 2004, DOI: 10.4321/S0210-48062004000100009
Abstract: background: the goal of this research is to make a comparative analysis of acute tubular necrosis (nta) incidence in function of preservation solution used: wisconsin vs celsior. methods: from january 1994 to december 2002, 229 kidney transplantation procedures were executed; 190 of them were perfused with winsconsin (82.9%) and 39 with celsior (17.1%). after checking the statistical homogeneity of both groups, we analysis comparativily the incidence of nta and the evolution of serum creatinine in function of preservation solution utilized. results: there was not statistical significant difference in nta incidence between celsior (23%) and wisconsin group (36%). we assesed that each group were comparable with regard to nta incidence of subgroups with cold ischemia times longer 12 hours. creatinine serum in celsior group tended to be lower than wisconsin group at 1, 3, 6 and 12 months postransplantation (statistically significant difference, p<0.05) conclusions: kidney preservation in celsior solution provides similar results to the ones obtained in wisconsin solution in relation with nta incidence and kidney function with the added advantage of a lower cost.
Impact of the Spanish Smoke-Free Legislation on Adult, Non-Smoker Exposure to Secondhand Smoke: Cross-Sectional Surveys before (2004) and after (2012) Legislation
Xisca Sureda, Jose M. Martínez-Sánchez, Marcela Fu, Raúl Pérez-Ortuo, Cristina Martínez, Esther Carabasa, María J. López, Esteve Saltó, José A. Pascual, Esteve Fernández
PLOS ONE , 2014, DOI: 10.1371/journal.pone.0089430
Abstract: Background In 2006, Spain implemented a national smoke-free legislation that prohibited smoking in enclosed public places and workplaces (except in hospitality venues). In 2011, it was extended to all hospitality venues and selected outdoor areas (hospital campuses, educational centers, and playgrounds). The objective of the study is to evaluate changes in exposure to secondhand smoke among the adult non-smoking population before the first law (2004-05) and after the second law (2011–12). Methods Repeated cross-sectional survey (2004–2005 and 2011–2012) of a representative sample of the adult (≥16 years) non-smoking population in Barcelona, Spain. We assess self-reported exposure to secondhand smoke (at home, the workplace, during leisure time, and in public/private transportation vehicles) and salivary cotinine concentration. Results Overall, the self-reported exposure to secondhand smoke fell from 75.7% (95%CI: 72.6 to 78.8) in 2004-05 to 56.7% (95%CI: 53.4 to 60.0) in 2011–12. Self-reported exposure decreased from 32.5% to 27.6% (?15.1%, p<0.05) in the home, from 42.9% to 37.5% (?12.6%, p = 0.11) at work/education venues, from 61.3% to 38.9% (?36.5%, p<0.001) during leisure time, and from 12.3% to 3.7% (?69.9%, p<0.001) in public transportation vehicles. Overall, the geometric mean of the salivary cotinine concentration in adult non-smokers fell by 87.2%, from 0.93 ng/mL at baseline to 0.12 ng/mL after legislation (p<0.001). Conclusions Secondhand smoke exposure among non-smokers, assessed both by self-reported exposure and salivary cotinine concentration, decreased after the implementation of a stepwise, comprehensive smoke-free legislation. There was a high reduction in secondhand smoke exposure during leisure time and no displacement of secondhand smoke exposure at home.
La influencia de los arbustos sobre la diversidad y abundancia de plantas herbáceas de la Prepuna a diferentes escalas espaciales
López,Ramiro P; Ortuo,Teresa;
Ecolog?-a austral , 2008,
Abstract: shrubs usually have a beneficial effect on herb species richness. in this study, the importance of shrubs/small trees on herb species richness and abundance in the prepuna biogeographical region was evaluated at the patch (individual patches and all individual patches considered together, i.e., patch types), community (landscape) and regional levels. at individual patch level, a tendency towards more herb species in association with shrub undercanopies was found, although only in two of the four localities studied the differences were statistically significant. at patch type level, more species were found associated to the below shrub microhabitats in all four localities. the analyses conducted with rarefaction runs confirmed a greater species number beneath shrubs and showed the positive effect of the shrubs on species richness at community scale, although showing variations in magnitude in the different localities. the patterns found were consistent across the latitudinal gradient studied, indicating that, at least in certain years, the positive influence of shrubs on herbs is not only a local phenomenon. moreover, as shrubs harbor different herb communities depending on locality, their positive effect seems to increase at regional scales. this study is the first reporting the beneficial role of shrubs on herb richness in the subtropical andes.
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