310 research outputs found
La rehabilitación física del adulto mayor con ictus isquémico agudo (Original)
Stroke sequelae are currently one of the leading causes of disability in older adults. The work was carried out in the Rehabilitation Department of the Provincial Clinical University Hospital, Doctor “Gustavo Alderguía Lima”, Cienfuegos, Cuba, with the aim of analyzing the contribution made by the implementation of the physical rehabilitation program and its adaptation to the context of application, to well-being and quality of life of the elderly with acute ischemic stroke. A correlational or multiple design was carried out, using a random and intentional sample, using diagnostic methods, documentary analysis and the authors' own experience. The relevance of the adjustments made to the rehabilitation program was evaluated using the Delphi method, based on expert criteria. As a main result, it was verified that they are very pertinent: the structure of the program, the systemic relationship that is established between its components, its content and forms of control, as well as the methodological guidelines that guarantee its realization in practice and with it, the value of the modifications made to its application, as required in the implementation scenario.Las secuelas por Ictus en la actualidad constituyen una de las primeras causas de discapacidad en los adultos mayores. El trabajo se desarrolló en el Departamento de Rehabilitación Física del Hospital Provincial Clínico Universitario, Doctor “Gustavo Alderguía Lima”, Cienfuegos, Cuba, con el objetivo de analizar la contribución que hizo la implementación del programa de rehabilitación física en el adulto mayor con ictus isquémico agudo al bienestar y calidad de vida del adulto mayor con Ictus Isquémico Agudo. Se realizó un diseño correlacional o múltiple utilizándose una muestra aleatoria intencional, empleándose el método diagnóstico y el análisis documental entre otros. La pertinencia de las adecuaciones hechas al programa de rehabilitación, se evaluó mediante el método Delphi, por criterio de expertos. Como principal resultado, se constató que resultan muy pertinentes: la estructura del programa, la relación sistémica que se establece entre sus componentes, su contenido y formas de control, así como, las orientaciones metodológicas que garantizan su concreción en la práctica y con ello, la valía de las modificaciones que se le realizaron para su aplicación, según se requirió en el escenario de implementación
Gadget for anchovy 9a South: Model description and results to provide catch advice and reference points (WGHANSA-1 2021)
The model speci fications presented below correspond to those benchmarked in WKPELA 2018. The main
difference is that results are presented now for the end of the second quarter of each year instead of being presented at the end of the fourth quarter. This responds to practical modi cations in the de nition of the assessment year, now it goes from July 1st to June 30th of the next year. Model speci fications for this year are presented in section 2.2 and ??, as well as estimated parameters after optimization in Table 2
Stubble rice (Oryza sativa L.) in direct sowing systems : handling alternatives
Los objetivos principales del presente trabajo fueron: a) Estudiar cuál es el uso adecuado de las distintas herramientas para mejorar la mineralización del rastrojo de
la cosecha de arroz (Oryza sativa L.) bajo siembra directa y b) Determinar, para períodos cortos, la cantidad de rastrojo depositado superficialmente y su tiempo de mineralización al utilizar las distintas técnicas de manejo del mismo. Los tratamientos fueron: cosechadora con desparramador deflector (T1DD), cosechadora sin desparramador triturador (T2SDT), cosechadora con desparramador centrífugo de caucho (T3DC) y cosechadora con desparramador metálico (T4DM). Alternativas implementadas: a) desmalezado b) rolo cuchilla y c) quemado de rastrojo. En las primeras dos alternativas, se aplicaron tres dosis de urea. Los resultados principales fueron: a) La T2SDT produjo, una mayor deposición de material en el centro de la máquina (21680 kg ha-1), b) la distribución de rastrojo de la (T3DC) fue más uniforme que para los otros tratamientos. Las principales conclusiones fueron: 1) Los desparramadores centrífugos de caucho y metálico produjeron mejor distribución del
material, 2) El uso de desmalezadora o rolo cuchilla sobre rastrojo de los tratamientos T3DC y T4DM aceleró la mineralización de los mismos. 3) Las dosis de urea causó poco incremento en la mineralización del rastrojo.The main purposes of this study were to: a) Find out how tools (deflectors, spreaders
and choppers) can be used best for improving mineralization of stubble from harvesting rice (Oryza sativa L.) grown under direct sowing and b) Determine, for short periods, the amount of crop residues deposited on the surface and its mineralization time with various management techniques. The treatments were: harvester with spreader (T1DD), harvester without spreader (T2SDT), harvester with rubber centrifugal
spreader (T3DC) and harvester with metal spreader (T4DM). Implemented alternatives: a) rotary weed cutter b) blade roller and c) burning crop residues. In the first two alternatives, three doses of urea were applied. The main results were: a) The harvester without spreader (T2SDT) deposited more material in the center of the tail (21680 kg ha-1), b) when distribution of crop residues from the (T3DC) was more uniform compared with the other treatments. The main conclusions were: 1) the rubber centrifugal spreader and metal spreader produced better distribution of the stubble, 2) The use of rotary weed cutter or blade roller on stubble distributed by harvesters T3DC and T4DM treatments caused accelerated mineralization of the same, 3) Urea doses caused little increase in mineralization of the rice stubble.Fil: Hidalgo, Ramón J..
Universidad Nacional del Nordeste. Facultad de Ciencias AgrariasFil: Botta, Guido Fernando.
Universidad Nacional de LujánFil: Tolón Becerra, Alfredo.
Universidad de AlmeríaFil: Pozzolo, Oscar R..
Instituto Nacional de Tecnología Agropecuaria (Argentina). Centro Nacional de Investigaciones Agropecuarias. Complejo CastelarFil: Dominguez, José F..
Universidad Nacional del NordesteFil: Serafini, Emiliano.
Universidad Nacional del Nordest
Gadget for anchovy 9a South: Model description and results to provide catch advice and reference points (WGHANSA-1 2022).
The model speci fications presented below correspond to those benchmarked in WKPELA 2018. The main
difference is that results are presented now for the end of the second quarter of each year instead of be presented at the end of the fourth quarter. This responds to practical modi cations in the defi nition of the assessment year, now it goes from July 1st to June 30th of the next year. Specifi c model assumptions for this year are presented in section 2.2 and 3, as well as estimated parameters after optimization in Table 2
A Discussion about the Methodology to Validate the Correlations of Heat Transfer Coefficients and Pressure Drop during the Condensation in a Finned-Tube Heat Exchanger
As already demonstrated by others authors, when the performance of a heat exchanger is analyzed, a semi-empirical model allows getting good prediction of the experimental results provided that it is accompanied by the application of the suitable correlations for calculating heat transfer coefficients (HTC) and pressure drop (PD) in both refrigerant and air side. Many correlations for calculating these coefficients are available in literature, therefore choose the more suitable of them turns out to be not an easy task. This paper presents a discussion about the methodology to perform a comparison aimed to define the criterion for choosing the most suitable correlation to be used in a simulation model for prediction of heat exchangers performance in refrigeration systems. Differently from others works, where the results of each correlation are compared with those obtained by means specific experiments focused on the local phenomenon visualization, in this work the correlations are compared against the measurements of a complete finned-tube condenser integrated in a traditional air-to-water heat pump. The comparison has been carried out using a model able to discretize the heat exchanger through a finite volume method (FVM). The discussion is supported with a case study which was experimentally tested and numerically modeled. The condenser is a finned tube coil that characterized by two asymmetric circuits. The tube diameter is 7 mm and the fin pitch is 2.6 mm. The experimental test bench includes a single-speed 34.3 cm3 reciprocating-hermetic compressor, a plate evaporator and an electronic valve as expansion device. An accumulator allow adjusting the condenser sub-cooling. A specific test campaign has been designed in order to cover a wide range operating points of the condenser: different air velocities (from 1.5 m/s to 4 m/s), inlet temperatures (20-46°C) and sub-cooling (0-5-10°C) have been taken into account. All the correlations considered were programmed and simulated with the software IMST-ART. In order to avoid the overlapping of the effects of the different correlations, during the analysis of the two-phase flow, the heat transferred in the one-phase section of the exchanger and the air-side heat transfer coefficient were maintained constant. The analysis of air-side heat transfer coefficient and pressure drop was carried out in the same way but keeping constant the coefficients of the refrigerant side. Different accuracy parameters were defined in order to assist the final decision about which correlation is able to provide the best agreement with experimental data. The paper aims to present a discussion about the validation methodology, the analysis of the correlations impact on the model results rather than define the parameters to choose the best correlation
Changes in Coastal Benthic Algae Succession Trajectories and Assemblages Under Contrasting Nutrient and Grazer Loads
Eutrophication plays a crucial role in coastal systems, driving changes in the composition and abundance of flora and fauna with consequent effects for the entire ecosystem. Sensitive to nutrient levels, micro- and macroalgal blooms serve as valuable indicators of eutrophication. The San Antonio Bay (Northern Argentinean Patagonia, 40° 43′ S, 64° 56′ W) provides an appropriate system to study in situ eutrophication processes on coastal communities. In a multi-scale approach, using two different kind of settlement substrates (micro: polyethylene terephthalate, and macro: ceramic), the present study followed benthic algal dynamics over one year, distinguishing changes in natural succession and seasonality. Strong differences were found in the biofilm assemblages after three days, marked by tube dwelling diatoms and Cocconeis spp. under high nutrient-grazer conditions and needle like diatoms (e.g. Nitzschia spp., Tabularia spp.) under lower nutrient-grazer loads. The succession continued by the colonization of macroalgae, with a higher recruitment rate in the nutrient and grazer rich environment with a concomitant higher diversity. Our results show that under higher nutrient-grazer conditions natural benthic succession not only differs in trajectory but in its final taxa composition promoting higher biodiversity and biomass accumulation. In addition, taxa specific substrate preferences interfere with the observed eutrophication pattern, suggesting substrate dependant interrelations between the bloom forming taxa. These findings provide evidence that nutrient enrichment can not only affect an established assemblage but also affect the early succession stages, changing the succession trajectory and thus the final assemblage.Facultad de Ciencias Naturales y Muse
Revista de Vertebrados de la Estación Biológica de Doñana
Captura de Petromyzon marinus lo en las Marismas del GuadalquivirEstudio sobre la Lagartiia de Valverde Algyroides marchi (Reptilia, Lacertidae)Dimorfismo sexual en Psammodromuus algirus (Reptilia, Lacertidae)Mecanismos de parasitización por Clamator glandarius y defensa por Pica pica.Nidificación de Cyanopica cyana en Doñana.Reproducción de la Urraca (P.pica) en DoñanaNesting relationship between Columba palambus and Milvus migransBiometría y dimorfismo sexual en el Calamón (Polphyrio porphyrio).Sobre sexo, mecanismos y proceso de reproducciónen el Buitre Leonado (Gyps fulvus)Aves anilladas por la Estación Biológica de Doñana. Informe Nº 1. (Años 1964 a 1971)Dimorfismo sexual y diferenciación de edades en Sturnus unicolor Temm.Contribución al estudio de la biología y ecología del Lirón Careto, Eliomys quercinus Linnaeus 1766, en Iberia Central, Parte 1: Crecimiento, Reproducción y Nidificación.Sobre el Lobo (Canis lupus) ibérico:1. Dimorfismo sexual en cráneosMorfología y dimorfismo sexual de la pelvis de Pitymys duodecimcostatusAlgunos aspectos del diformismo sexual en el cráneo de las Ginetas españolas, (Genetta genetta) (L.) 1758Peer reviewe
Rastrojo de arroz (Oryza sativa L.) en sistemas de siembra directa: alternativas de manejo
The main purposes of this study were to: a) Find out how tools (deflectors, spreaders and choppers) can be used best for improving mineralization of stubble from harvesting rice (Oryza sativa L.) grown under direct sowing and b) Determine, for short periods, the amount of crop residues deposited on the surface and its mineralization time with various management techniques. The treatments were: harvester with spreader (T1DD), harvester without spreader (T2SDT), harvester with rubber centrifugal spreader (T3DC) and harvester with metal spreader (T4DM). Implemented alternatives: a) rotary weed cutter b) blade roller and c) burning crop residues. In the first two alternatives, three doses of urea were applied. The main results were: a) The harvester without spreader (T2SDT) deposited more material in the center of the tail (21680 kg ha-1), b) when distribution of crop residues from the (T3DC) was more uniform compared with the other treatments. The main conclusions were: 1) the rubber centrifugal spreader and metal spreader produced better distribution of the stubble, 2) The use of rotary weed cutter or blade roller on stubble distributed by harvesters T3DC and T4DM treatments caused accelerated mineralization of the same, 3) Urea doses caused little increase in mineralization of the rice stubble.Los objetivos principales del presente trabajo fueron: a) Estudiar cuál es el uso adecuado de las distintas herramientas para mejorar la mineralización del rastrojo de la cosecha de arroz (Oryza sativa L.) bajo siembra directa y b) Determinar, para períodos cortos, la cantidad de rastrojo depositado superficialmente y su tiempo de mineralización al utilizar las distintas técnicas de manejo del mismo. Los tratamientos fueron: cosechadora con desparramador deflector (T1DD), cosechadora sin desparramador triturador (T2SDT), cosechadora con desparramador centrífugo de caucho (T3DC) y cosechadora con desparramador metálico (T4DM). Alternativas implementadas: a) desmalezado b) rolo cuchilla y c) quemado de rastrojo. En las primeras dos alternativas, se aplicaron tres dosis de urea. Los resultados principales fueron: a) La T2SDT produjo, una mayor deposición de material en el centro de la máquina (21680 kg ha-1), b) la distribución de rastrojo de la (T3DC) fue más uniforme que para los otros tratamientos. Las principales conclusiones fueron: 1) Los desparramadores centrífugos de caucho y metálico produjeron mejor distribución del material, 2) El uso de desmalezadora o rolo cuchilla sobre rastrojo de los tratamientos T3DC y T4DM aceleró la mineralización de los mismos. 3) Las dosis de urea causó poco incremento en la mineralización del rastrojo
Etología. Introducción a la ciencia del comportamiento
1ª ed., 3ª reimp.El objetivo de este libro es proporcionar una introducción a la Etología. Ésta ciencia responde al interés por profundizar en el conocimiento de las costumbres animales; por comprender la variedad de comportamientos que en diferentes situaciones exhiben los individuos de diferentes especies. Una posible definición de Etología podría ser: el estudio científico del comportamiento de los seres vivos. A lo largo de esta obra se analizan todos los aspectos que tienen que ver con el comportamiento animal, desde las causas y mecanismos de actuación o la adaptación y evolución y el bienestar animal.The purpose of this book is to provide an introduction to Ethology. This science responds to the interest in deepening the knowledge of animal customs; to understand the variety of behaviour that in different situations exhibit individuals of different species. A possible definition of ethology could be: the scientific study of the behavior of living beings. Throughout this book all aspects related to animal behavior, from the causes and mechanisms of action or adaptation and evolution and animal welfare, are analyzed
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