Publish in OALib Journal

ISSN: 2333-9721

APC: Only $99


Any time

2019 ( 5 )

2018 ( 8 )

2017 ( 4 )

2016 ( 11 )

Custom range...

Search Results: 1 - 10 of 3957 matches for " Alicia; Araya "
All listed articles are free for downloading (OA Articles)
Page 1 /3957
Display every page Item
Population structure, reproductive biology and feeding of Astyanax fasciatus (Cuvier, 1819) in an Upper Paraná River tributary, Misiones, Argentina
Hirt, Lourdes María;Araya, Patricia Raquel;Flores, Silvia Alicia;
Acta Limnologica Brasiliensia , 2011, DOI: 10.4322/actalb.2011.013
Abstract: aim: the genus astyanax is one of the richest in number of species and has one of the widest geographical distributions in argentina, being possible to find in nine ichthyogeographic ecoregions. the aim of the present work was to analyze the population structure of astyanax fasciatus in the garupá stream, province of misiones, argentina, considering its distribution by size, standard length-total weight relationship and aspects of its reproductive and feeding biology; methods: a total of eight experimental fishing campaigns were carried out between september 2002 and may 2004, in agreement with the seasons of the year, using a set of gillnets; results: we captured a total of 386 individuals, 70% of which in the middle basin in autumn and winter. the following gonad stages were identified in both males and females: resting, maturing, mature and spawning. the highest gonadal activity corresponded to the autumn-winter period. the middle basin showed the highest capture of individuals in reproductive activity, thus reflecting the seasonality of spawning. the average fecundity was of 4000 oocytes, being 1100 μm the largest oocyte diameter. the mean standard length of the total catch was 99.3 mm and females reached larger sizes than males (p < 0.05). the standard length varied according to the seasons of the year. both sexes presented an isometric growth (b = 3). females presented the highest values of k in spring and summer, whereas males did so in spring. the k-gsi relationship reflected that the highest k values corresponded to the lowest gsi ones. we found that a. fasciatus feeds on a wide variety of foods of both plant and animal origin. the food items of plant origin presented the highest index of occurrence; conclusions: the long spawning seasons and the recruitment along all four seasons of the year allow characterizing a. fasciatus as a foraging species that is very well adapted to the environment studied in this work.
Acceso solar a las edificaciones. El eslabón pendiente en la norma urbanística chilena sobre la actividad proyectual. / Solar access to buildings. The unsolved link in Chile’s urban laws regarding architectural design activity.
Luz Alicia Cárdenas Jirón,Paula Uribe Araya
Revista de Urbanismo , 2012, DOI: doi: 10.5354/0717-5051.2012.20922
Abstract: Hoy en día las demandas energéticas y la búsqueda de fuentes renovables no contaminantes, tales como las Energías Renovables No Convencionales ERNC, son cada vez más acuciantes en el mundo. Entre ellas está la energía solar, cuya captación adquiere una importancia crucial en el medio urbano, debido a obstrucciones provenientes de las morfologías resultantes de la dinámica inmobiliaria. No obstante, se plantea que la vinculación entre morfología urbana y captación solar por edificaciones para sistemas activos, no ha sido abordada en el medio nacional. El objetivo de este artículo es reflexionar respecto a un concepto clave en estas materias: el acceso solar,porque se transforma en un bien muy preciado y necesario resguardar para el bien común. El enfoque adoptado analiza dos marcos normativos convergentes a la actividad proyectual energética solar: la Ordenanza General de Urbanismo y Construcciones (OGUC)) y la Ley del Net Metering (NM). Se analiza la aplicación de la normativa OGUC en un caso hipotético, sus implicancias en las sombras arrojadas sobre edificaciones, predios y espacios públicos. El resultado final es la contextualización espacial de un problema detectado entre forma urbana y energía solar, conducente a develar un eslabón pendiente en la normativa chilena sobre actividad proyectual./Nowadays energy demand and searching for renewable no polluted source such as Renewable Energy No Conventional (ERNC) has become crucial in the world. Solar energy is one of them whose insolation has a key importance in the built environment because obstructions comingfrom ending morphology of the real estate./ Although that it is stated that link between urban morphology and building insolation for active systems has not yet been tackled in the national legislation. The objective of the article is to think about a key concept: solar access because it is relevant for equity viewpoint. The paperfocus on two legislative frameworks embodied to solar urbanism design and power such as Ordenanza General de Urbanismo (OGUC) and Net Metering Law (NM). To demonstrate unlink a hypothetical case is studied for its implications on buildings, allotment and public space. Final result is putting on ground a spatial problem between urban form and solar energy leading to reveal unsolved link in the Chilean urbanism normative.
A Review of Effective Waste Management from an EU, National, and Local Perspective and Its Influence: The Management of Biowaste and Anaerobic Digestion of Municipal Solid Waste  [PDF]
Mebrahtom Negash Araya
Journal of Environmental Protection (JEP) , 2018, DOI: 10.4236/jep.2018.96041
Abstract: The waste management industry across the European Union (EU) has undergone radical change following the recognition that a move towards a sustainable society is essential for humankind. To this end, the EU has targeted household recycling targets of 50% by 2020 and 70% by 2030 in a bid to move towards a more sustainable and resource efficient society. Despite such targets and a number of relevant progresses in technology (such as incineration, composting, and anaerobic digestion), there are several challenges facing the municipal solid waste sector. The purpose of this review is to assess the EU, UK and local policies that are affecting the way waste is treated, Greater Manchester (GM) in the United Kingdom (UK), will be used as an example. The review focuses upon anaerobic digestion as a choice technology for waste management and assesses the influences of policies upon the application of anaerobic digestion at the EU and local level, finding that at current rates of recycling, local and national targets will be missed by approximately 7.3% in the year 2030, even in the best case scenario where the maximum amount of biowaste is managed under the current operational capacity. The review concludes that in order to improve the recycling bio-waste capacity on a local, national, and EU level, the introduction of the AD must be increased tremendously.
Wound Healing: From Epidermis Culture to Tissue Engineering  [PDF]
Alicia Lorenti
CellBio (CellBio) , 2012, DOI: 10.4236/cellbio.2012.12003
Abstract: The skin is the largest organ of the individual, being the interface between the body and the microenvironment. In severely burned patients and other diseases, the physiological processes of wound healing are not sufficient to complete the closure of their wounds. The in vitro culture of autologous epidermis, which has represented the beginning of Tissue Engineering, is a valuable tool for the treatment of these patients. Keratinocytes can be cultured and stratified in vitro, and an entire epidermal sheet can be obtained. The epidermis cells can be amplified in the laboratory from a skin sample to obtain a surface equivalent to that required for each patient. This technology was first used clinically in 1981 and in Argentina since 1991. Wound repair is a complex process that involves dermal and epidermal cells, extracellular matrix, soluble factors and the sum of interactions between them, providing physical, biological and chemical keys capable of guiding cell function. Seeking to improve the results obtained with cultured epidermis, tissue engineering was directed towards the development of substitutes that not only involve epidermis but also the dermal component. The tissue engineered skin and its therapeutic applications reported in this review demonstrate the feasibility and effectiveness of these approaches. It represents a clear benefit in wound healing. Now, focus must be directed on the development of new scaffolds, developed by different technologies, such as polymer science, or nanotechnology, able to be used as templates to direct the growth of cells, in an attempt to better regenerate the lost skin.
Teaching materials: a critical position about the role they play in the language classroom
Araya Araya, Karla
Revista Electrónica Actualidades Investigativas en Educación , 2007,
Abstract: Resumen: Este artículo se propone esclarecer la importancia y la función que juegan los materiales didácticos –desde los planteamientos de la pedagogía crítica– en la conformación y desarrollo del proceso de la ense anza-aprendizaje de una lengua. Más allá de la función instrumentalista que suele asignarse a los materiales didácticos, en el presente trabajo éstos se visualizan como construcciones discursivas que pueden facultar la apropiación del pensamiento basada en el desarrollo de habilidades lingüísticas que reflejen un discurso crítico ante los diferentes reclamos (problemas) históricos a los que estudiantes se ven expuestos dentro y fuera del aula. Para tal propósito, se realiza una revisión conceptual-teórica sobre la importancia y la función que los materiales tienen en el proceso de ense anza-aprendizaje de una lengua. Bajo una perspectiva crítica, se aborda el tema de los materiales didácticos y la construcción de la motivación así como el tema de ideología y materiales didácticos. Finalmente, se concluye que en el proceso de ense anza-aprendizaje de una lengua, los materiales didácticos son reproductores y reproducciones discursivas e ideológicas de ciertas realidades que pueden ofrecer visiones de mundo basadas en los intereses de clases dominantes si no se abordan desde posturas críticas.Abstract: The aim of this article is to state the importance teaching materials have in developing a language teaching-learning process based on the principles of the critical thinking pedagogy. From this perspective, this work questions the traditional conceptions and notions related to instruments of access assigned to materials. They are conceived as discursive constructions that can, or cannot, help to empower students with a critical discourse in order to promote a significant change in their attitudes towards the social, political and economical problems they face every day. To support this position, a conceptual study about theoretical assumptions related to the importance and the role teaching materials have in the language teaching-learning process has been carried out. Also, there is a general analysis regarding the relationship among teaching materials, motivation and ideology. Finally, it can be concluded that materials are reproductions and constructors of certain discursive and ideological realities that usually favor the interests of the dominant classes. That is why a critical position about the role teaching materials have is necessary to prevent the reproduction of prejudices and common sense assumptions about language and society.
Control program of hydatid disease in the province of Río Negro Argentina.: 1980-1997
Larrieu,Edmundo; Costa,María Teresa; Cantoni,Gustavo; Labanchi,José Luis; Bigatti,Ricardo; Pérez,Alicia; Araya,Daniel; Mancini,Sergio; Herrero,Eduardo; Talmon,Gabriel; Romeo,Susana; Thakur,Amar;
Boletín chileno de parasitología , 2000, DOI: 10.4067/S0365-94022000000300003
Abstract: la hidatidosis constituye un serio problema de salud pública en la provincia de río negro, argentina. los factores que han motivado esta situación incluyen una economía rural basada en la ganadería ovina extensiva, bajas condiciones socioculturales en una porción importante de la población rural, hábitos de faenamiento domiciliario de ovinos adultos para consumo humano con entrega de las vísceras resultantes del acto para consumo de los perros e infraestructura de faena en peque?as comunidades rurales altamente deficiente. esta situación ha promovido la instrumentación de un programa de control basado en la desparasitación canina sistemática con praziquantel, la vigilancia con arecolina, la educación sanitaria, el control de faena, la legislación y la atención de las personas. el programa, puesto en marcha en 1980, cubrió inicialmente con acciones sistemáticas 51.479 km2, alcanzándose en 1992 120,013 km2 bajo control. 11.915 canes rurales han recibido 1,870,423 comprimidos de praziquantel con coberturas que en promedio fueron del 65%. se efectuaron 21.444 controles de materia fecal canina mediante la dosificación con bromhidrato de arecolina, (control anual del 11,2% de los canes bajo programa). la prevalencia equinococcósica inicial era de 41,5%, siendo en 1996 del 2,9%. la hidatidosis ovina, por su parte, presenta una disminución acentuada de la prevalencia, ubicándose en 1996 en el 5,5%. en relación a hidatidosis humana, 1,720 casos nuevos fueron diagnosticados en toda la provincia en el período 1980/1996, el 31,4% de los cuales correspondieron a infectados asintomáticos, mediante encuestas serológicas o ecográficas (48.826 encuestas serológicas a población escolar y a pobladores rurales adultos y 2.762 encuestas ultrasonográficas). el número de casos humanos nuevos en el grupo de edad 0-10 a?os presenta una disminución del 77% desde la puesta en marcha del programa. por el contrario, zonas no tratadas muestran una tendencia estable en la aparición de casos human
Tabaquismo y salud mental
Rojas C,Graciela; Gaete O,Jorge; González R,Isabel; Ortega A,Marcela; Figueroa M,Alicia; Fritsch M,Rosemarie; Araya B,Ricardo;
Revista médica de Chile , 2003, DOI: 10.4067/S0034-98872003000800006
Abstract: smoking continues to be one of the most important health burdens worldwide. aim: to describe smoking habits and associated risk factors in the population of santiago, chile. material and methods: a cross sectional study of a representative sample of the population, from 16 to 64 years old, residents of santiago, chile (total population: 3,237,286). a structured interview that included questions about use of tobacco, the cis-r interviews, used for common mental disorders, were applied. results: from the sample of 4,693 households, 3,870 people were interviewed (52.2% women, 47.8% men) and 10% refused. forty percent of the population currently smoked (52.5% men, 47.8% women). ?being a current smoker? was associated with being younger than 55, male sex, and having a common mental disorder. discussion: smoking is highly prevalent in chile, as compared with developed countries and with some developing countries. gender differences in use of tobacco have decreased. a higher risk of smoking for people with mental disorders is confirmed (rev méd chile 2003; 131: 873-80)
Las aguas ocultas de Valparaíso
ARQ (Santiago) , 2009, DOI: 10.4067/S0717-69962009000300007
Abstract: the topography forces the modification of the regular urban weave and generates variations, such as the folds leading the waterways. valparaiso is understood in its crevices, in the relationships between the hills, the waters and the sea. it is in this way that its inhabitants adapt to the geography and benefit from it.
Revista chilena de literatura , 2008, DOI: 10.4067/S0718-22952008000200001
Abstract: the book convento espiritual (spiritual convent) ofthe spanish nun ursula de san diego, possibly written during the sixteenth century in granada, spain, is part of a tradition of womens' writing as an exercise in mystical-ascetic and devout religious life on both sides of the atlantic. this essay proposes a reading this text within the frame of a textual genre originated in those practices of knowledge organization derived from the arts of memory; as a textual genre, it can also be understood as aform of subject construction. these are remarkable features to be foundin this text, and though they are not exclusive to it, they are important because the convento espiritual belongs to the history of the early books printed in chile after the independence; this points out to the recognition of the educational value ?of this type of writing women in those societies belonging to the old regime.
De las últimas cosas, De novissimis, desde la perspectiva evangélica
Teología y vida , 2000, DOI: 10.4067/S0049-34492000000100009
Abstract: the doctrine of eschatology, or the last things, was kept by the lutheran theology within the traditional eschatology of the old church without much enthusiasm until the coming of the early 20th century european wars. after the slaughter, the german lutheran theologians faced a different reality, which has made them reformulate and discuss the position of man before the last things. are the last times already taking place now or will they como in the future? or rather, the time has already como for those who believe and it is today when we have to face the word of god. does this end take place in history? who absorbs who; the eschatology to history or history to the eschatology? what do we understand by death? there is the old greek myth of the soul which separates from the body, which seems to contradict the resurreection of the body according to the nicene-apostolic creed. man today does not believe in the end of the times as he used to centuries age, but has constructed a new way to understand his own end. an existential way which deals with himself in desacralized way.
Page 1 /3957
Display every page Item

Copyright © 2008-2017 Open Access Library. All rights reserved.