La problemática de la alimentación : Una experiencia de aprendizaje de biología en el contexto de la educación popular, como herramienta de transformación social

La implementación del sistema Neoliberal en América Latina ha venido generando graves consecuencias a nivel educativo, familiar y comunitario y ha provocado una fuerte crisis alimentaria. Bajo éstas circunstancias, desde el año 1998, funcionan los Bachilleratos Populares en provincia de Buenos Aires y Capital Federal, surgiendo como proyectos educativos comprometidos con la realidad de nuestro pueblo y apuntando al desarrollo de un pensamiento crítico para la transformación social. Como docentes del Bachillerato Popular Roca Negra (Monte Chingolo, Lanús, provincia de Buenos Aires) desarrollamos la problemática de la alimentación en un marco de educación para la salud. Se trabajó con metodología taller (Algava, M, 2006), apostando a la construcción dialógica del conocimiento entre educadores y educandos, y analizando una situación concreta del barrio. El tratamiento integral de la problemática, tomando aspectos biológicos, sociales, culturales y económicos, generó resultados positivos en relación al empoderamiento en el espacio de construcción del Bachillerato y contribuyó a la valoración de la biología como herramienta de transformación social, asumiéndonos como sujetos activos, capaces de modificar la realidad.

Talleres de Remedios de Escalada : Auge y decadencia de su dimensión social

La siguiente ponencia es el resultado de una línea de trabajo desarrollada dentro del proyecto de investigación 33B104 "La relación entre los poderes públicos y los clubes de fútbol: el caso Talleres de Remedios de Escalada 1990-2012", llevado a cabo en la Universidad Nacional de Lanús. La misma tiene como objeto describir y comprender el proceso histórico de desarrollo de la dimensión social del Club Talleres de Remedios de Escalada, que alcanza su auge en las décadas del 60' y 70'. Fundado en 1906, el club comenzó a diversificar sus actividades más allá del fútbol profesional, a partir de la década del 30, proceso que de modo similar se fue dando en la mayoría de los clubes de fútbol de área metropolitana de Buenos Aires. Sin embargo es a partir de comienzos de los años 60? cuando estas actividades, principalmente los bailes, adquieren una enorme relevancia, tornando al club Talleres en uno de los espacios más importante de sociabilidad urbana, trascendiendo su influencia la del propio partido de Lanús. Pretendemos describir dicho proceso, las lógicas y actores participantes, como un modo de aportar a la comprensión del rol que cumplen y cumplieron los clubes de fútbol en nuestra sociedad, en tantos espacios privilegiados de sociabilidad urbana

Club Atlético Talleres de Remedios de Escalada : Historia de la crisis del club

La siguiente ponencia está enmarcada dentro del proyecto de investigación 33B104 "La relación entre los poderes públicos y los clubes de fútbol: el caso Talleres de Remedios de Escalada 1990-2012", llevado a cabo en la Universidad Nacional de Lanús. El presente trabajo abordará la crisis institucional del Club Atlético Talleres de Remedios de Escalada, un proceso que, aún de origen impreciso, puede rastrearse a comienzos de la década del 90, en el contexto de crisis socioeconómica en el marco de las denominadas políticas neoliberales. Crisis de alcance nacional que, entre varios efectos que desencadenó, produjo desequilibrios institucionales en numerosos clubes de fútbol de la Argentina. Pretendemos describir la historia de la crisis de la institución que la llevó a la quiebra en 1999, y a la vez, analizar el proceso de recuperación de la misma en el año 2008. La particularidad del caso que nos compete, radica en las características de los actores intervinientes, en las luchas de intereses, y en las circunstancias políticas, sociales y económicas que llevaron al mismo a lidiar con semejante realidad. En la crisis y resurrección de Talleres hemos podido, por lo menos por ahora, encontrar algunos lineamientos para poder comprender íntegramente las consecuencias que produjo el neoliberalismo sobre la realidad de clubes de fútbol de la Argentina

Determinación del Modelo de Meta-Análisis Para Experimentación en Ingeniería del Software

Este proyecto de investigación se desarrolla en el marco de la cooperación existente entre el Grupo de Ingeniería de Software Experimental (GrISE) de la Facultad de Informática de la Universidad Politécnica de Madrid, el Grupo de Investigación en Sistemas de Información (GISI) del Departamento de Desarrollo Productivo y Tecnológico de la Universidad Nacional de Lanús y el Grupo de Estudio en Metodologías de Ingeniería de Software (GEMIS) de la Facultad Regional Buenos Aires de la Universidad Tecnológica Nacional.

La divulgación radiofónica de la alimentación y la higiene infantil en la España de la Segunda República (1933-1935)

El trabajo analiza la incorporación de medios tecnológicos, en particular la radio, en el proceso de divulgación del conocimiento sobre la salud infantil durante la Segunda República española. En el marco de la campaña sanitaria contra la mortalidad infantil que puso en marcha la Segunda República en la década del 30, la Asociación Española de Médicos Puericultores Titulados, en colaboración con Unión Radio, organizó dos ciclos de conferencias radiofónicas que pretendían explicar, a través de un discurso divulgativo de tono descriptivo dirigido a las clases populares, las nociones fundamentales de la higiene y la alimentación infantil, e impulsar una cultura de la prevención, guiada y orientada por los dictados de los expertos. Se trataba de una acción de propaganda y divulgación que tenía su continuidad en el medio familiar y comunitario a través de la actuación de las enfermeras visitadoras puericultoras, contemplando a las madres como población diana.

Relación entre crisis económica y salud: ¿lo relevante son las políticas de austeridad?

Discusión sobre: Tapia Granados JA. La crisis y la salud en España y en Europa: ¿Está aumentando la mortalidad? Salud Colectiva. 2014;10(1):81-91.

Global color estimation of special-effect coatings from measurements by commercially available portable multiangle spectrophotometers

Colors of special-effect coatings have strong dependence on illumination/viewing geometry and an appealing appearance. An open question is to ask about the minimum number of measurement geometries required to completely characterize their observed color shift. A recently published principal components analysis (PCA)-based procedure to estimate the color of special-effect coatings at any geometry from measurements at a reduced set of geometries was tested in this work by using the measurement geometries of commercial portable multiangle spectrophotometers X-Rite MA98, Datacolor FX10, and BYK-mac as reduced sets. The performance of the proposed PCA procedure for the color-shift estimation for these commercial geometries has been examined for 15 special-effect coatings. Our results suggest that for rendering the color appearance of 3D objects covered with special-effect coatings, the color accuracy obtained with this procedure may be sufficient. This is the case especially if geometries of X-Rite MA98 or Datacolor FX10 are used.

Visibility of sparkle in metallic paints

For suitable illumination and observation conditions, sparkles may be observed in metallic coatings. The visibility of these sparkles depends critically on their intensity, and on the paint medium surrounding the metallic flakes. Based on previous perception studies from other disciplines, we derive equations for the threshold for sparkles to be visible. The resulting equations show how the visibility of sparkles varies with the luminosity and distance of the light source, the diameter of the metallic flakes, and the reflection properties of the paint medium. The predictions are confirmed by common observations on metallic sparkle. For example, under appropriate conditions even metallic flakes as small as 1 μm diameter may be visible as sparkle, whereas under intense spot light the finer grades of metallic coatings do not show sparkle. We show that in direct sunlight, dark coarse metallic coatings show sparkles that are brighter than the brightest stars and planets in the night sky. Finally, we give equations to predict the number of visually distinguishable flake intensities, depending on local conditions. These equations are confirmed by previous results. Several practical examples for applying the equations derived in this article are provided.

Weather and the XXVI Olympiad : a documentary of weather support for the 1996 Olympic Games /

Shipping list no.: 96-0366-P.

Lettre sur le progrès des sciences, /

Leaves C3, G3, and G4 signed "Ciiij", ""Gij", and "Giij".

Ausgewählte Erzählungen

1. Jakob Gzela -- Mašlans Frau -- Der Vorzugsschüler -- 2. Nach dem Tode -- Oversberg. Aus dem Tagebuche des Volontärs Ferdinand Binder -- 3. Prinzessin Leiladin -- Die Freiherren von Gemperlein.

Relation between cell disruption conditions, cell debris particle size, and inclusion body release

The efficiency of physical separation of inclusion bodies from cell debris is related to cell debris size and inclusion body release and both factors should be taken into account when designing a process. In this work, cell disruption by enzymatic treatment with lysozyme and cellulase, by homogenization, and by homogenization with ammonia pretreatment is discussed. These disruption methods are compared on the basis of inclusion body release, operating costs, and cell debris particle size. The latter was measured with cumulative sedimentation analysis in combination with membrane-associated protein quantification by SDS-PAGE and a spectrophotometric pepticloglycan quantification method. Comparison of the results obtained with these two cell debris quantification methods shows that enzymatic treatment yields cell debris particles with varying chemical composition, while this is not the case with the other disruption methods that were investigated. Furthermore, the experiments show that ammonia pretreatment with homogenization increases inclusion body release compared to homogenization without pretreatment and that this pretreatment may be used to control the cell debris size to some extent. The enzymatic disruption process gives a higher product release than homogenization with or without ammonia pretreatment at lower operating costs, but it also yields a much smaller cell debris size than the other disruption process. This is unfavorable for centrifugal inclusion body purification in this case, where cell debris is the component going to the sediment and the inclusion body is the floating component. Nevertheless, calculations show that centrifugal separation of inclusion bodies from the enzymatically treated cells gives a high inclusion body yield and purity. (C) 2004 Wiley Periodicals, Inc.

Digital communication networks incorporating mobile data terminals

The use of digital communication systems is increasing very rapidly. This is due to lower system implementation cost compared to analogue transmission and at the same time, the ease with which several types of data sources (data, digitised speech and video, etc.) can be mixed. The emergence of packet broadcast techniques as an efficient type of multiplexing, especially with the use of contention random multiple access protocols, has led to a wide-spread application of these distributed access protocols in local area networks (LANs) and a further extension of them to radio and mobile radio communication applications. In this research, a proposal for a modified version of the distributed access contention protocol which uses the packet broadcast switching technique has been achieved. The carrier sense multiple access with collision avoidance (CSMA/CA) is found to be the most appropriate protocol which has the ability to satisfy equally the operational requirements for local area networks as well as for radio and mobile radio applications. The suggested version of the protocol is designed in a way in which all desirable features of its precedents is maintained. However, all the shortcomings are eliminated and additional features have been added to strengthen its ability to work with radio and mobile radio channels. Operational performance evaluation of the protocol has been carried out for the two types of non-persistent and slotted non-persistent, through mathematical and simulation modelling of the protocol. The results obtained from the two modelling procedures validate the accuracy of both methods, which compares favourably with its precedent protocol CSMA/CD (with collision detection). A further extension of the protocol operation has been suggested to operate with multichannel systems. Two multichannel systems based on the CSMA/CA protocol for medium access are therefore proposed. These are; the dynamic multichannel system, which is based on two types of channel selection, the random choice (RC) and the idle choice (IC), and the sequential multichannel system. The latter has been proposed in order to supress the effect of the hidden terminal, which always represents a major problem with the usage of the contention random multiple access protocols with radio and mobile radio channels. Verification of their operation performance evaluation has been carried out using mathematical modelling for the dynamic system. However, simulation modelling has been chosen for the sequential system. Both systems are found to improve system operation and fault tolerance when compared to single channel operation.

Optimising QoE distribution for video applications through LTE-WiFi interworking

Mobile WiFi devices are becoming increasingly popular in non-seamless and user-controlled mobile traffic offloading alongside the standard WiFi hotspots. Unlike the operator-controlled hotspots, a mobile WiFi device relies on the capacity of the macro-cell for the data rate allocated to it. This type of devices can help offloading data traffic from the macro-cell base station and serve the end users within a closer range, but will change the pattern of resource distributions operated by the base station. We propose a resource allocation scheme that aims to optimize user quality of experience (QoE) when accessing video services in the environment where traffic offloading is taking place through interworking between a mobile communication system and low range wireless LANs. In this scheme, a rate redistribution algorithm is derived to perform scheduling which is controlled by a no-reference quality assessment metric in order to achieve the desired trade-offs between efficiency and fairness. We show the performance of this algorithm in terms of the distribution of the allocated data rates throughout the macro-cell investigated and the service coverage offered by the WiFi access point.

Cooperative and adaptive medium access control in multi-hop wireless networks

Due to low cost and easy deployment, multi-hop wireless networks become a very attractive communication paradigm. However, IEEE 802.11 medium access control (MAC) protocol widely used in wireless LANs was not designed for multi-hop wireless networks. Although it can support some kinds of ad hoc network architecture, it does not function efficiently in those wireless networks with multi-hop connectivity. Therefore, our research is focused on studying the medium access control in multi-hop wireless networks. The objective is to design practical MAC layer protocols for supporting multihop wireless networks. Particularly, we try to prolong the network lifetime without degrading performances with small battery-powered devices and improve the system throughput with poor quality channels. ^ In this dissertation, we design two MAC protocols. The first one is aimed at minimizing energy-consumption without deteriorating communication activities, which provides energy efficiency, latency guarantee, adaptability and scalability in one type of multi-hop wireless networks (i.e. wireless sensor network). Methodologically, inspired by the phase transition phenomena in distributed networks, we define the wake-up probability, which maintained by each node. By using this probability, we can control the number of wireless connectivity within a local area. More specifically, we can adaptively adjust the wake-up probability based on the local network conditions to reduce energy consumption without increasing transmission latency. The second one is a cooperative MAC layer protocol for multi-hop wireless networks, which leverages multi-rate capability by cooperative transmission among multiple neighboring nodes. Moreover, for bidirectional traffic, the network throughput can be further increased by using the network coding technique. It is a very helpful complement for current rate-adaptive MAC protocols under the poor channel conditions of direct link. Finally, we give an analytical model to analyze impacts of cooperative node on the system throughput. ^