52 research outputs found
Creatividad, procesos formativos y desarrollos en investigación en la nanoescala : un abordaje antropológico
No full textEl trabajo de investigación con científicos en los campos de la Nanociencia y la Nanotecnología, aporta en la presente obra, elementos para el estudio de la creatividad, acerca de la cual se reflexiona en estrecha relación con los procesos formativos y en el desarrollo de las actividades de investigación. La creatividad es examinada en la contribución a la resolución de problemas y a la generación de nuevas ideas y conceptos en los casos de descubrimiento científico e invención tecnológica. Y vinculada en las investigaciones que los científicos realizan en la frontera del conocimiento. La experticia en la interpretación, incluyendo el componente creativo en su formulaciónel estudio de la creatividad en el diseño de los sistemas de autoensamblado molecular, y el examen de las formas creativas de interacción del Microscopio de efecto túnel con la materia, son algunas de las actividades de investigación enfatizadas, todas ellas, relacionadas con potenciales contribuciones en ciencia básica y con la realización de aplicaciones tecnológicas.Fil: Lebedinsky, Viviana. Universidad Nacional de General Sarmiento. Instituto de Ciencias; Argentina
Grain growth modelling for continuous casting ingots of Al-Si eutectic
No full textTyt. z nagłówka.Pozostali autorzy referatu: A. M. Branovitsky, Y. A. Lebedinsky, I. L. Zakharov.Bibliogr
Samoa observada. Verdades y ficciones acerca de la controversia antropológica Mead-Freeman
No full textEl presente artículo discurre acerca de la polémica que suscitó la publicación del libro del antropólogo australiano Derek Freeman, “Margared Mead and Samoa. The Making and Unmaking of an Anthropological Myth”, cuya propuesta fue la de refutar las principales conclusiones a las que la antropóloga norteamericana Margared Mead había arribado en su primer trabajo de campo, publicado en 1928 bajo el título “Coming of Age in Samoa”.Basándome en los dos libros pilares de la controversia, así como en un video editado en 1988 que recoge la opinión de varios antropólogos norteamericanos y entrevistados samoanos sobre la problemática en cuestión, el objetivo del trabajo es analizar la polémica a partir de una reflexión sobre la temática de la verdad y la ficción, ligándola a la de la descripción, interpretación y explicación en Antropología
Empirical Test of Affine Stochastic Discount Factor Model of Currency Pricing
No full textIn this note, I conduct an empirical investigation of the affine stochastic discount factor model proposed by Backus, Foresi and Telmer (2001), who showed that such a model might be able to explain the forward premium anomaly. Evidence presented here suggests that the model can reproduce the forward premium anomaly only by placing restrictions on the behavior of spot and forward exchange rates that are not consistent with the data. The model assumes that an increase in the forward premium must be accompanied by an increase in volatilities of the forward premium and of the exchange rate depreciation. I find that this assumption is not supported by the data. When I relax the model by allowing the forward premium to vary without necessarily affecting conditional second moments, the model no longer reproduces the forward premium anomaly. Thus, I conclude that the model can reproduce the anomaly only by forcing a linear heteroskedastic process that is not supported by the data.
A Study of the Stochastic Behavior of Durable Goods Consumption
No full textThe author of this thesis examines the stochastic behavior of durables consumption in the rational expectations/permanent income hypothesis framework. The testing in this paper parallels the studies conducted by other researchers, who basing their work mainly on quarterly data rejected the frictionless rational expectations/permanent income hypothesis. The distinctive feature of this thesis is that the models are examined using monthly instead of quarterly data. The results of the estimation are compared to the results based on quarterly data. The results show that estimates obtained using monthly data seem to be more consistent with the frictionless rational expectations/permanent income hypothesis than the estimates from quarterly data. Then, by using two subsets of the monthly data representing the first and the last twelve years of a 37 year period, the models are reexamined to explore the possibility of change in the stochastic behavior of personal expenditures on durable goods over time. This results suggest a change in influence of liquidity constraints on the time series behavior of durable goods consumption over the last four decades
De mitos, rituales y viajes : Un estudio antropológico de la Unión Industrial Argentina
No full textEn el presente artículo se analizan los mitos de origen y fundacional de una de las centrales gremial-empresaria más significativas de la Argentina: la Unión Industrial Argentina (UIA). En forma complementaria se estudian los rituales correspondientes al "Día de la Industria Argentina" que tienen a la UlA como principal protagonista.
Inscripta en la línea de una antropología de los mundos contemporáneos, mi intención, al elaborar la investigación que nutre este artículo, fue también la de alimentar la continuidad de su debate.The current anide analyses the origin and founding myths of one of the most important business groups of Argentina the Industrial Argentinian Union (IAU) -an entrepenurial unión-. Rituals connected with Argentine Industry Day, that have the IAU as main protagonist are studied also. Suscribing the line of contemporary anthropology the intention guiding this research has also been to feed the continuity of its debate.Sociedad Argentina de Antropologí
De mitos, rituales y viajes : Un estudio antropológico de la Unión Industrial Argentina
No full textEn el presente artículo se analizan los mitos de origen y fundacional de una de las centrales gremial-empresaria más significativas de la Argentina: la Unión Industrial Argentina (UIA). En forma complementaria se estudian los rituales correspondientes al "Día de la Industria Argentina" que tienen a la UlA como principal protagonista.
Inscripta en la línea de una antropología de los mundos contemporáneos, mi intención, al elaborar la investigación que nutre este artículo, fue también la de alimentar la continuidad de su debate.The current anide analyses the origin and founding myths of one of the most important business groups of Argentina the Industrial Argentinian Union (IAU) -an entrepenurial unión-. Rituals connected with Argentine Industry Day, that have the IAU as main protagonist are studied also. Suscribing the line of contemporary anthropology the intention guiding this research has also been to feed the continuity of its debate.Sociedad Argentina de Antropologí
Rationale of schemes and parameters for reconstruction of existing transport system in quarry of "LEBEDINSKY MPP" company
No full textПоказана необходимость разработки рациональных схем вскрытия глубоких
горизонтов карьеров для каждого применяемого вида транспорта. Обоснованы зависимости
для определения места расположения перегрузочных пунктов с учетом минимума энергетических затрат автотранспорта. Рассмотрена возможность отработки южного рабочего борта
карьера ОАО «Лебединского ГОКа» с помощью проходки и формирования въездных скользящих железнодорожных съездов под максимально возможным руководящим уклоном, с
учетом отработки рыхлых вскрышных пород средствами гидромеханизации. Предложено
учитывать при проектировании на перспективу понижение ведения открытых горных работ
ниже горизонта подсчета балансовых геологических запасов, за счет переноса транспортных
коммуникаций с нерабочего на рабочий борт карьера.Показано необхідність розробки раціональних схем розкриття глибоких горизонтів
кар'єрів для кожного застосовуваного виду транспорту. Обґрунтовано залежності для визначення
місця розташування перевантажувальних пунктів з урахуванням мінімуму енергетичних витрат автотранспорту. Розглянуто можливість відпрацювання південного робочого борта кар'єру ВАТ «Лебединського ГЗК» за допомогою проходки та формування в'їзних ковзних залізничних з'їздів під максимально можливим керівним ухилом, з урахуванням відпрацювання розкривних порід засобами гідромеханізації. Запропоновано враховувати при проектуванні на перспективу зниження ведення відкритих гірничих робіт нижче горизонту підрахунку
балансових геологічних запасів, за рахунок перенесення транспортних комунікацій з неробочого на робочий борт кар'єру.A need for developing efficient schemes for deep horizon opening in the quarries
with taking into account each type of transports is shown. Dependences for fixing locations of the
transfer points with minimal expenditure of energy for the motor transport are disclosed. The author
considers a possibility to mine highwalls in the quarry of the “Lebedinsky MPP" Company with
drivage and formation of entry sliding rail off-ramp with maximally possible ruling grade and with
mining loose overburden by hydromechanical facilities. It is proposed to take into account in future
designs further deepening of open-cast mining operations below horizon of estimated geological
reserves because of transport communications transferred from spoil bank to the highwall
The development of affective behavioral complexes: a level-based model
No full textThe author discusses sources for, problems in, and ways of forming a hierarchical model of the development of whole affective behavioral complexes, not just mechanisms of emotional regulation, as was done in the original level-based model elaborated by Victor Lebedinsky. The author describes specific traits of affective behavioral complexes and types of links between them on different levels. Primitive affective behavioral complexes, either isolated or rigidly linked, dominate on the lower three levels. On the fourth level attachment behavior plays a “star” role, mediating and regulating all vital behaviors. On the fifth level symbolic activity permanently rebuilds the experience obtained on the lower levels. The author discusses links between affective behavioral complexes and nuclear personality formations
Analysis of three genomes within the thermophilic bacterial species Caldanaerobacter subterraneus with a focus on carbon monoxide dehydrogenase evolution and hydrolase diversity
No full text14 páginas.-- 5 figuras.-- 1 tabla.-- 80 referencias.-- Supporting data are included as Additional files. Phylogenetic data have been deposited at Tree BASE under the accession URL http://purl.org/phylo/treebase/phylows/study/TB2:S18113.-- The electronic version of this article is the complete one and can be found online at: http://www.biomedcentral.com/1471-2164/16/757[Background] The Caldanaerobacter subterraneus species includes thermophilic fermentative bacteria able to grow on carbohydrates substrates with acetate and L-alanine as the main products. In this study, comprehensive analysis of three genomes of C. subterraneus subspecies was carried in order to identify genes encoding key metabolic enzymes and to document the genomic basis for the evolution of these organisms.[Methods] Average nucleotide identity and in silico DNA relatedness were estimated for the studied C. subterraneus genomes. Genome synteny was evaluated using R2CAT software. Protein conservation was analyzed using mGenome Subtractor. Horizontal gene transfer was predicted through the GOHTAM pipeline (using tetranucleotide composition) and phylogenetic analyses (by maximum likelihood). Hydrolases were identified through the MEROPS and CAZy platforms.[Results] The three genomes of C. subterraneus showed high similarity, although there are substantial differences in their gene composition and organization. Each subspecies possesses a gene cluster encoding a carbon monoxide dehydrogenase (CODH) and an energy converting hydrogenase (ECH). The CODH gene is associated with an operon that resembles the Escherichia coli hydrogenase hyc/hyf operons, a novel genetic context distinct from that found in archetypical hydrogenogenic carboxydotrophs. Apart from the CODH-associated hydrogenase, these bacteria also contain other hydrogenases, encoded by ech and hyd genes. An Mbx ferredoxin:NADP oxidoreductase homolog similar to that originally described in the archaeon Pyrococcus furiosus was uniquely encoded in the C. subterraneus subsp. yonseiensis genome. Compositional analysis demonstrated that some genes of the CODH-ECH and mbx operons present distinct sequence patterns in relation to the majority of the other genes of each genome. Phylogenetic reconstructions of the genes from these operons and those from the ech operon are incongruent to the species tree. Notably, the cooS gene of C. subterraneus subsp. pacificus and its homologs in C. subterraneus subsp. tengcongensis and C. subterraneus subsp. yonseiensis form distinct clades. The strains have diverse hydrolytic enzymes and they appear to be proteolytic and glycolytic. Divergent glycosidases from 14 families, among them amylases, chitinases, alpha-glucosidases, beta-glucosidases, and cellulases, were identified. Each of the three genomes also contains around 100 proteases from 50 subfamilies, as well about ten different esterases. Conclusions: Genomic information suggests that multiple horizontal gene transfers conferred the adaptation of C. subterraneus subspecies to extreme niches throughout the carbon monoxide utilization and hydrogen production. The variety of hydrolases found in their genomes indicate the versatility of the species in obtaining energy and carbon from diverse substrates, therefore these organisms constitute a remarkable resource of enzymes with biotechnological potential. © 2015 Sant'Anna et al.FHS received scholarship from Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES, Brazil), process number 2403-13-7. The work of AVL and TGS was supported by the Russian Scientific Fund grant no. 14-24-00165. JMG acknowledges funding through projects CSD2009-00006, CGL2014-58762-P and GEN2006-26423-E from the Spanish Ministry of Economy and Competitiveness and RNM2529 and BIO288 from the Andalusian Government; Feder funds cofinanced these projects. C. subterraneus pacificus genome sequencing was carried out by the J. Craig Venter Institute through the Microbial Genome Sequencing Project sponsored by The Gordon and Betty Moore Foundation’s Marine Microbiology Initiative. Funding from the mobility programme 003-ABEL-CM-2013 (NILS Science and Sustainability programme, EEA grants) is also acknowledged. FTR acknowledges the support of a US National Science Foundation Grant. FTR acknowledges grant support from the Center for Dark Energy Biosphere Investigations (C-DEBI), an NSF Research Center at the University of Southern California. We acknowledge support of the publication fee by the CSIC Open Access Publication Support Initiative through its Unit of Information Resources for Research (URICI).Peer reviewe
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