Closed form solutions to a generalization of the Solow growth model.

The Solow growth model assumes that labor force grows exponentially. This is not a realistic assumption because, exponential growth implies that population increases to infinity as time tends to infinity. In this paper we propose replacing the exponential population growth with a simple and more realistic equation - the Von Bertalanffy model. This model utilizes three hypotheses about human population growth: (1) when population size is small, growth is exponential; (2) population is bounded; and (3) the rate of population growth decreases to zero as time tends toward infinity. After making this substitution, the generalized Solow model is then solved in closed form, demonstrating that the intrinsic rate of population growth does not influence the long-run equilibrium level of capital per worker. We also study the revised model's stability, comparing it with that of the classical model.Solow growth model, population growth

Storage lipids and proteins of Euterpe edulis seeds

Comparative studies on fatty acid and protein composition of the endosperm and embryo of palmito (Euterpe edulis Martius) were conducted using gas-liquid chromatography and sodium dodecyl sulfate–polyacrylamide gel electrophoresis. On a dry weight basis, the embryo contained extremely lower amounts of lipids and proteins than did the endosperm, which was associated with the scarce lipid and protein bodies previously reported in axis and cotyledon. The fatty acid composition also exhibited differences between both tissues: (I) the fatty acid diversity was greater in embryo than in endosperm; (II) embryo and endosperm contained predominantly linoleic, palmitic, oleic and stearic acids even though the relative values were different for each tissue. As compared to other palm species, the higher fatty acid unsaturation in Euterpe edulis seed could be involved in the previously reported short longevity and recalcitrant behavior during storage. Proteins of both tissues were heterogeneous in molecular mass. Some proteins were tissue-specific, but other were common, among them a highly glycosylated protein which migrated at about 55 kDa. We hypothesize that the latter, also reported in all previously studied palm species, is one of the proteins characterizing the Arecaceae family.Fil: Panza, Víctor. Instituto Nacional de Tecnología Agropecuaria. Centro de Investigación de Recursos Naturales. Instituto de Recursos Biológicos; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Biodiversidad y Biología Experimental; ArgentinaFil: Pighín, Darío Gabriel. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Biodiversidad y Biología Experimental y Aplicada. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Biodiversidad y Biología Experimental y Aplicada; Argentina. Instituto Nacional de Tecnología Agropecuaria; ArgentinaFil: Lainez, Veronica. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Biodiversidad y Biología Experimental y Aplicada. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Biodiversidad y Biología Experimental y Aplicada; ArgentinaFil: Pollero, Ricardo Jose. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Investigaciones Bioquímicas de La Plata "Prof. Dr. Rodolfo R. Brenner". Universidad Nacional de la Plata. Facultad de Ciencias Médicas. Instituto de Investigaciones Bioquímicas de La Plata "Prof. Dr. Rodolfo R. Brenner"; ArgentinaFil: Maldonado, Sara Beatriz. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Biodiversidad y Biología Experimental y Aplicada. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Biodiversidad y Biología Experimental y Aplicada; Argentina. Instituto Nacional de Tecnología Agropecuaria. Centro de Investigación de Recursos Naturales. Instituto de Recursos Biológicos; Argentin

[Instrucción, 1830-6-29]

En pie de pag. al final del texto figura: Sres. Justicia y Ayuntamiento de Santa Maria de NievaCopia digital. Valladolid : Junta de Castilla y León. Consejería de Cultura y Turismo, 2009-2010Tít. tomado del textoTexto firmado por Gabriel González MaldonadoTexto fechado en Segovia 6 de setiembre de 1830Se ha respetado la puntuación origina

Static range of motion of the first metatarsal in the sagittal and frontal planes

The first metatarsal and medial cuneiform form an important functional unit in the foot, called “first ray”. The first ray normal range of motion (ROM) is difficult to quantify due to the number of joints that are involved. Several methods have previously been proposed. Controversy exists related to normal movement of the first ray frontal plane accompanying that in the sagittal plane. The objective of this study was to investigate the ROM of the first ray in the sagittal and frontal planes in normal feet. Anterior-posterior radiographs were done of the feet of 40 healthy participants with the first ray in a neutral position, maximally dorsiflexed and maximally plantarflexed. They were digitalized and the distance between the tibial malleolus and the intersesamoid crest in the three positions mentioned was measured. The rotation of the first ray in these three positions was measured. A polynomic function that fits a curve describing the movement observed in the first ray was obtained using the least squares method. ROM of the first ray in the sagittal plane was 6.47 (SD 2.59) mm of dorsiflexion and 6.12 (SD 2.55) mm of plantarflexion. ROM in the frontal plane was 2.69 (SD 4.03) degrees of inversion during the dorsiflexion and 2.97 (SD 2.72) degrees during the plantarflexion. A second-degree equation was obtained, which represents the movement of the first ray. Passive dorsiflexion and plantarflexion of the first ray were accompanied by movements in the frontal plane: 0.45 degrees of movement were produced in the frontal plane for each millimeter of displacement in the sagittal plane. These findings might be useful for the future design of instruments for clinically quantifying first ray mobility

Silêncio administrativo e serviço público : estudo sobre as omissões estatais no sistema de transporte rodoviário de passageiros

Monografia (graduação)—Universidade de Brasília, Faculdade de Direito, 2014.Este trabalho trata do silêncio administrativo e como ele pode ajudar a entender casos atinentes à consecução de finalidades públicas no âmbito da prestação de serviços públicos, mais precisamente na prestação do serviço de transporte rodoviário interestadual de passageiros. Para tanto, investigou-se a natureza jurídica do silêncio administrativo, traçando-se um paralelo entre as experiências de diversas ordens jurídicas para culminar, na primeira etapa do texto, na análise do posicionamento doutrinário e jurisprudencial de estudiosos e magistrados brasileiros acerca das omissões administrativas. Em seguida, estudou-se o sistema de transporte coletivo interestadual de passageiros, bem como o panorama legislativo e constitucional que o subjaz, recolhendo informações acerca de suas características basilares para subsidiar a compreensão dos efeitos do silêncio administrativo na prestação desse serviço público. Assimiladas as consequências da omissão estatal, foi analisada a atuação do Judiciário para, por fim, procurar entender os efeitos das omissões no padrão de decisões judiciais, tendo em vistas os princípios da administração pública e as consequências do silêncio do Estado para os administrados

Cambios en la apropiación del espacio durante el período agroalfarero prehispánico en la vertiente oriental de la sierra de Quilmes (Tucumán, Argentina)

El valle de Yocavil o de Santa María se encuentra dentro del Noroeste Argentino, se extiende desde el norte de la provincia de Catamarca hasta el suroeste de la de Salta y está flanqueado por las Cumbres Calchaquíes y sierra del Aconquija al este, y la sierra de Quilmes al oeste. Dentro del ámbito de esta última, el área de investigación de esta tesis corresponde aproximadamente al tercio central de la sierra, dentro de los límites de la provincia de Tucumán. La lectura de antecedentes permitió establecer que se desconocían las características espaciales que tuvo la ocupación del área referida a lo largo de la etapa agroalfarera prehispánica, sus factores de cambios y/o persistencias. Consecuentemente, se propuso el objetivo general de proveer una visión integradora de la apropiación y uso de los espacios a lo largo del tiempo por parte de las sociedades agroalfareras prehispánicas que habitaron el sector de estudio propuesto. Los objetivos específicos apuntaron a establecer los patrones de uso del espacio regional durante la etapa agroalfarera prehispánica y sus cambios, los factores naturales que influyeron en ello así como los procesos de formación de sitios a escala regional. Metodológicamente, se efectuó un mapeo geomorfológico del área de estudio mediante fotointerpretación de fotografías pancromáticas escala 1:50000 (1969). Sobre esa base se planeó y ejecutó el reconocimiento de superficie mediante transectas transversales al valle fluvial principal con registro de los lugares arqueológicos, sus características arquitectónicas generales y recolección de cerámica de superficie. Luego se establecieron distinciones cronológicas entre los lugares arqueológicos utilizando los indicadores cerámicos y arquitectónicos conocidos para el valle y se graficaron sobre el mapa morfogenético. El panorama obtenido permitió seleccionar tres áreas muestras a los fines de realizar sondeos y excavaciones, correspondientes a las localidades de: 1- El Arbolar-Colalao del Valle; 2- Las Cañas-El Bañado; 3- Los Chañares-El Paso. Ello permitió abarcar el norte, centro y sur del área de estudio, y la ladera, piedemonte y fondo de valle en sentido este-oeste. Los sondeos se distribuyeron longitudinalmente a la pendiente dominante, se describieron los perfiles estratigráficos y se tomaron muestras sedimentarias que luego fueron analizadas (granulometría, morfología, composición, contenido de biosílices). Se registraron y analizaron trazas de alteración de los conjuntos cerámicos.The Yocavil or Santa María valley is located in the Northwest of Argentina. It extends from Catamarca province to the southwest of Salta province. It is limited by Cumbres Calchaquíes and sierra del Aconquija by the east, and sierra de Quilmes by the west. The central third of sierra de Quilmes belongs to Tucumán province and constitutes our study area. The antecedents lecture showed that the spatial characteristics of the past human occupations of the agrarian period of the area were almost unknown including their changing factors and/or persistence. Consequently, we propose as general objective to provide an integrative vision of the appropriation ways and use of these spaces along agricultural prehispanic period. Specific objectives were to establish the use patterns of the region during the cited period and its changes, the natural factors that influenced on that, as well as the site formation processes in a regional level. We started by the geomorphological mapping of the area through photointerpretation of aerial photographs scale 1:50000 (1969). Over this base several transects, transversal to the main collector river were survey. Archaeological places and their architectural characteristics were recorded together with the recovering of surficial potsherds. Then, chronological differences were established between the archaeological places using the ceramic potsherds and the architectural features comparing them with typological materials known from the valley. All this information was included on the geomorphological map. After this first approximation, three sample areas among the localities of: 1- El Arbolar-Colalao del Valle; 2- Las Cañas-El Bañado; 3- Los Chañares-El Paso. This three sample areas covered the north, center, and south of the study area, and from west to east from slope areas to bottom valley including the piedmont. The pits were distributed along the main slopes. All profiles were stratigraphically described and sediment samples were taken and analyzed (texture, grain morphology, composition, biosilicate contents). The features of alteration of ceramic fragments were also analyzed.Facultad de Ciencias Naturales y Muse