Reflexiones sobre el 17 de octubre de 1945. Cambios en la mentalidad trabajadora

El presente trabajo analiza el impacto que produjo la jornada del 17 de octubre de 1945 en la mentalidad de los trabajadores, especialmente en aquellos que de alguna manera u otra participaron en los acontecimientos. La elección del tema se debe al interés por profundizar en la historia del Peronismo, sobre todo dada la gran cantidad de contradicciones existentes en lo que respecta a sus orígenes y conformación. Este es precisamente un aspecto particular que no ha sido lo suficientemente abordado, al menos desde la perspectiva de la Historia de las Mentalidades. En efecto, llama la atención, pese al abundante material disponible sobre la experiencia peronista, la inexistencia de trabajos que se refieran en forma específica a cómo ese "Gran día Peronista" modificó la mentalidad de la clase trabajadora. Con este objetivo y partiendo del marco de la Historia de las Mentalidades abordamos el análisis de fuentes orales que, juntamente con la bibliografía específica sobre el período, nos permitirán escudriñar en los efectos que la jornada tuvo sobre los participantes y los sectores populares.Fil: Acerenza, Maximiliano. Universidad de Buenos Aires. Facultad de Ciencias Económicas; Argentina.Fil: De Jorge, Carlos. Universidad de Buenos Aires. Facultad de Ciencias Económicas; Argentina

An iterative solution approach for truck routing and scheduling in the forest industry

Log transportation in forest industry is a resource-intensive operation and represents a great challenge for logistic planners. Several trips must be generated in order to satisfy plants demand; in addition, trucks arrivals at each plant must be considered in order to avoid unproductive waiting times. In the Argentine context, specifically in the Argentinean Northeast (NEA) region, these activities represent the main sustenance of the regional economies, so enhancing efficiency in the transport operation would represent a considerable improvement for these economies. In this work, an iterative solution approach for the truck routing and scheduling problems is presented. The proposed strategy involves two stages which are iteratively solved: product allocation, trip composition and truck routing problems are first solved through a Mixed-Integer Linear Programming model (MILP), while in the second stage, fixing the route for each truck according to the results of the previous step, a MILP model for the scheduling of truck arrivals at plants is considered. If no feasible solution for the scheduling problem is obtained, then an integer cut is applied in order to exclude from the search space truck routes already explored in previous iterations. The solution approach is tested in a case study representative of the Argentine context and conclusions are detailed.Sociedad Argentina de Informática e Investigación Operativ

An iterative solution approach for truck routing and scheduling in the forest industry

Log transportation in forest industry is a resource-intensive operation and represents a great challenge for logistic planners. Several trips must be generated in order to satisfy plants demand; in addition, trucks arrivals at each plant must be considered in order to avoid unproductive waiting times. In the Argentine context, specifically in the Argentinean Northeast (NEA) region, these activities represent the main sustenance of the regional economies, so enhancing efficiency in the transport operation would represent a considerable improvement for these economies. In this work, an iterative solution approach for the truck routing and scheduling problems is presented. The proposed strategy involves two stages which are iteratively solved: product allocation, trip composition and truck routing problems are first solved through a Mixed-Integer Linear Programming model (MILP), while in the second stage, fixing the route for each truck according to the results of the previous step, a MILP model for the scheduling of truck arrivals at plants is considered. If no feasible solution for the scheduling problem is obtained, then an integer cut is applied in order to exclude from the search space truck routes already explored in previous iterations. The solution approach is tested in a case study representative of the Argentine context and conclusions are detailed.Sociedad Argentina de Informática e Investigación Operativ

An iterative solution approach for truck routing and scheduling in the forest industry

Log transportation in forest industry is a resource-intensive operation and represents a great challenge for logistic planners. Several trips must be generated in order to satisfy plants demand; in addition, trucks arrivals at each plant must be considered in order to avoid unproductive waiting times. In the Argentine context, specifically in the Argentinean Northeast (NEA) region, these activities represent the main sustenance of the regional economies, so enhancing efficiency in the transport operation would represent a considerable improvement for these economies. In this work, an iterative solution approach for the truck routing and scheduling problems is presented. The proposed strategy involves two stages which are iteratively solved: product allocation, trip composition and truck routing problems are first solved through a Mixed-Integer Linear Programming model (MILP), while in the second stage, fixing the route for each truck according to the results of the previous step, a MILP model for the scheduling of truck arrivals at plants is considered. If no feasible solution for the scheduling problem is obtained, then an integer cut is applied in order to exclude from the search space truck routes already explored in previous iterations. The solution approach is tested in a case study representative of the Argentine context and conclusions are detailed.Sociedad Argentina de Informática e Investigación Operativ

Mixed integer linear programming approaches for solving the raw material allocation, routing and scheduling problems in the forest industry

Transportation planning in forest industry is a challenging activity since it involves complex decisions about raw material allocation, vehicle routing and scheduling of trucks arrivals to both harvest areas and the plants. In the Argentine context, specifically in the Argentinean Northeast (NEA) region, the forest industry plays essential role for the economic development and, among the included activities, the transportation is the key element considering the volumes that must be moved and the distances to be traveled. Therefore, enhancing efficiency in the transportation activity improves significantly the performance of this industry. In this work, a Mixed Integer Linear Programming (MILP) model is presented, where raw material allocation, vehicle routing and scheduling of trucks arrivals are simultaneously addressed. Since the resolution times of the proposed integrated MILP model are prohibitive for large instances, a hierarchical approach is also presented. The considered decomposition approach involves two stages: in the first phase, the raw material allocation and vehicle routing problems are solved through a MILP model, while in the second phase, fixing the route for each truck according to the results of the previous step, the scheduling of truck arrivals to both the harvest areas and the plants is solved through a new MILP model. The obtained results show that the proposed approach is very effective and could be easily applied in this industry.Fil: Bordon, Maximiliano Ramon. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Desarrollo y Diseño. Universidad Tecnológica Nacional. Facultad Regional Santa Fe. Instituto de Desarrollo y Diseño; ArgentinaFil: Montagna, Jorge Marcelo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Desarrollo y Diseño. Universidad Tecnológica Nacional. Facultad Regional Santa Fe. Instituto de Desarrollo y Diseño; ArgentinaFil: Corsano, Gabriela. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Desarrollo y Diseño. Universidad Tecnológica Nacional. Facultad Regional Santa Fe. Instituto de Desarrollo y Diseño; Argentin

Systematic analysis and phylogeny of Tapetinae Gray, 1851, Pitarinae Stewart, 1930 and Meretricinae Gray, 1847, subfamilies (Bivalvia: Veneridae) of the Cenozoic of Argentina and Antarctica

Se realizó el análisis sistemático de 29 taxones agrupados en 10 géneros, incluyendo dos especies y cuatro géneros nuevos, pertenecientes a las subfamilias Pitarinae (Austrocallista, Eucallista, Nov. Gen. X), Tapetinae (Retrotapes, Katelysia, Nov. Gen. Y, Nov. Gen. Z) y Meretricinae (Nov. Gen. W, Tivela, Eutivela). Los resultados del estudio sistemático, se pusieron a prueba mediante múltiples análisis de morfometría geométrica y filogenéticos. Los estudios morfométricos corroboraron la validez del género Retrotapes, demostraron que las especies eocenas antárcticas R. robustus y R. antarcticus poseen dos morfotipos, confirmándose además, en el caso de ésta última que las formas globosas corresponden a ejemplares longevos y también se validaron las sinonimias entre las especies Pitar lahillei var. ortmanni (Pleistoceno) y Nov. Gen. X patagonicus (Pleistoceno–Reciente), así como la diferenciación entre ésta última y de Nov. Gen. X mutabile (Mioceno medio–Mioceno tardío). Las filogenias de pitarinas y tapetinas, también han avalado las determinaciones realizadas, ya que los géneros Retrotapes, Katelysia, Austrocallista, Eucallista y Nov. Gen. X, se recuperaron como grupos monofiléticos. Las relaciones establecidas permitieron inferir un posible origen antártico de las tapetinas australes, mientras que las pitarinas sudamericanas tendrían un origen tropical. También se ajustó el biocrón de las tapetinas de la Formación La Meseta (Eoceno, Antártida), se incluyó en las biozonas del Oligoceno tardío–Mioceno tardío a la fauna estudiada de dichas edades y se redefinieron los biocrones de las especies vivientes Eucallista purpurata y Nov. Gen. X patagonicus.A systematic analysis of 29 taxa grouped into 10 genera, including two new species and four new genera, of the subfamilies Pitarinae (Austrocallista, Eucallista, Nov. Gen. X), Tapetinae (Retrotapes, Katelysia, Nov. Gen. Y, Nov. Gen. Z) and Meretricinae (Nov. Gen. W, Tivela, Eutivela) was carried out. These results were tested by performing several geometric morphometric and phylogenetic analyses. The morphometric studies corroborated the validity of Retrotapes, demonstrated that the Eocene species R. robustus and R. antarcticus have two mophotypes, and that in the case of R. antarticus the globose morphotype correspond to elder specimens. In addition, the synonymy between Pitar lahillei var. ortmanni (Pleistocene) and Nov. Gen. X patagonicus (Pleistocene–Recent) as well as the differentiation between Nov. Gen. X patagonicus and Nov. Gen. X mutabile (Middle Miocene–Late Miocene) was confirmed. The phylogenies of Pitarinae and Tapetinae have supported the systematic arrangement proposed, the genera Retrotapes, Katelysia, Austrocallista, Eucallista and Nov. Gen. X are monophyletic groups. The established relationships allowed to infer a possible Antarctic origin for austral Tapetinae, while the sudamerican Pitarinae would have had a tropical origin. Besides, the biocron of the Tapetinae from La Meseta Formation (Eocene, Antarctica) was adjusted. The studied fauna was included in the Late Oligocene–Late Miocene biozones and the biocrons of the living species Eucallista purpurata and Nov. Gen. X patagonicus were redefined.Fil: Alvarez, Maximiliano Jorge. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina

“Venericardia” patagonica é uma das espécies de bivalves mais comuns presentes no Oligoceno superior–Mioceno médio da Patagônia

‘Venericardia’ patagonica is one of the most common bivalve species represented in the late Oligocene–middle Miocene of Patagonia. Previous authors recognized two contrasting morphologies within this species based on sculpture and outline. An Elliptic Fourier Analysis was performed, using the anterior view of 95 specimens. A Principal Component Analysis was carried out with the Fourier coefficients. The results show two well differentiated groups, based on development of the convexity, each of which could correspond to the mature male and female, as is proposed for other carditids. The females have more bulky shells, with maximum convexity at the centre of valves. The males have less bulky shells, with a sharp ventral edge. These differences correlate with sculpture (more pronounced in males) and size of specimens (larger in females).Autores prévios reconheceram duas diferentes morfologias dentro dessa espécie a partir de sua ornamentação externa e contorno em vista lateral. Realizaram-se análises de morfometria geométrica, utilizando Contornos Elípticos de Fourier, capturando o contorno da vista anterior das valvas de 95 espécimes e de Componentes Principais dos Coeficientes de Fourier. Os resultados mostraram dois grupos bem diferenciados, baseados na convexidade das valvas, os quais corresponderiam a machos e fêmeas, como é proposto para outros carditídeos. As fêmeas teriam conchas mais volumosas, com sua convexidade máxima próxima ao centro das valvas, enquanto os machos possuem conchas menos abauladas, com a convexidade máxima próxima à margem ventral. Estas diferenças se correlacionam com outras na ornamentação externa (mais pronunciada nos machos) e no tamanho dos exemplares (maior nas fêmeas).Fil: Perez, Damián. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"; ArgentinaFil: Alvarez, Maximiliano Jorge. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"; ArgentinaFil: del Río, Claudia Julia. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"; Argentin

Linguistically motivated parameter estimation methods for a superpositional intonation model

This paper proposes two novel approaches for parameter estimation of a superpositional intonation model. These approaches present linguistic and paralinguistic assumptions for initializing a pre-existing standard method. In addition, all restrictions on the configuration of commands were eliminated. The proposed linguistic hypotheses can be based on either pitch accents or lexical stress, which give rise to two different estimation methods. These two hypotheses were validated by comparison of the estimation performance relative to two standard methods, one manual and one automatic. The results of the experiments for German, English and Spanish corpora show that the proposed methods outperform the standard ones.Fil: Torres, Humberto Maximiliano. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Houssay. Instituto de Inmunología, Genética y Metabolismo. Universidad de Buenos Aires. Facultad de Medicina. Instituto de Inmunología, Genética y Metabolismo; ArgentinaFil: Gurlekian, Jorge Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Houssay. Instituto de Inmunología, Genética y Metabolismo. Universidad de Buenos Aires. Facultad de Medicina. Instituto de Inmunología, Genética y Metabolismo; ArgentinaFil: Mixdorff, Hansjörg. Beuth University Berlin; AlemaniaFil: Pfitzinger, Hartmut. Pfitzinger Voice Design; Alemani

Falla de transferencia pasiva de inmunoglobulina G y su asociación con mortalidad por enterotoxemia en alpacas neonatas

Determina la asociación entre FTP y la mortalidad por enterotoxemia en alpacas neonatas. La toma de muestras se realiza en comunidades y centro de producción de los departamentos de Cusco y Puno. Se realiza la cuantificación de niveles de IgG de 17 animales casos y 26 controles usando el test de Inmunodifusión Radial (IDR) mediante el método de Mancini y se confronta con una curva estándar de cinética de degradación de IgG en crías de alpaca normales. Mediante la prueba de Odds Ratio se determina que no hay una asociación estadísticamente significativa entre FTP y Enterotoxemia.Tesi