Arqueología en áreas de montaña. Ganadería, movimientos pastoriles y cultura material

González Álvarez, David & Rodríguez Hernández, Jesús (2011): Arqueología en áreas de montaña. Ganadería, movimientos pastoriles y cultura material. In: OrJIA (ed.), Actas de las II Jornadas de Jóvenes en Investigación Arqueológica (JIA 2009), tomo I. Zaragoza: Libros Pórtico, 121-122.Peer reviewe

La conquista romana del Occidente Cantábrico: novedades arqueológicas

Presentamos varios yacimientos militares romanos recientemente descubiertos en el área asturleonesa. Sus ubicaciones y características formales son propias de los campamentos romanos temporales – castra aestiva – de cronología altoimperial. Por ello, sería presumible relacionarlos con las Guerras Cántabras. Su georreferenciación ofrece información sobre las operaciones militares de conquista en un escenario inédito para las interpretaciones tradicionales de las fuentes clásicas. [ABSTRACT] This article presents a number of Roman military sites recently discovered in Asturias and León (Northern Iberia). Their specific locations and formal features are related with Roman marching camps – castra aestiva – dating back to the Early Roman Empire period. The paper argues that those sites are most likely related with Cantabrian Wars. Their georeferencing provides us with novel information on military operations that stands apart from traditional interpretations of the classical sources

Los campamentos romanos de El Mouru (Grau-Miranda, Asturias) en la vía de La Mesa

Se presentan dos castra aestiva recientemente descubiertos en las montañas del centro de Asturias. Se describen las evidencias constructivas conservadas para los dos recintos, así como las amenazas que ponen en peligro su conservación. Estos dos campamentos se sitúan junto a la vía de La Mesa, ruta de especial importancia en época romana que atraviesa la Cordillera Cantábrica. Por último, señalamos posibles líneas interpretativas que puedan contextualizar históricamente la cronología y funcionalidad concreta de estos yacimientos a partir del análisis territorial de su entorno. [ABSTRACT] In this work we present two castra aestiva recently discovered in the mountains of centralAsturias. The constructive remains for both marching camps are described, and we point out the threats that endanger their preservation. These two camps are nearby the route of La Mesa, a very important road in the Roman period through the Cantabrian Mountains. Finally, we suggest some hypothesis for these marching camps, attending the territorial context of the surroundings during Roman times, in order to get possible research lines which could contextualize them in a functional and chronological sense

Propuestas de prospección de bajo coste para la detección de campamentos romanos de campaña. El área occidental de la Cordillera Cantábrica como caso de estudio

En este trabajo se expone y discute el método arqueológico experimentado para la localización y estudio de campamentos romanos de campaña situados en áreas de montaña. A partir de una propuesta de trabajo desarrollada en el área occidental de la Cordillera Cantábrica, valoramos las potencialidades de distintas técnicas para la detección de evidencias arqueológicas relacionadas con la conquista romana de este territorio. Por medio de herramientas diversas, como la documentación cartográfica y la fotografía aérea disponibles en libre acceso a través de internet, la atención a la toponimia o a las tradiciones orales del folklore, junto a la prospección convencional en superficie, se ha desarrollado con éxito un protocolo para la identificación de castra aestiva con unos costes reducidos que podría ser transferible a otros espacios montañosos. [ABSTRACT] This paper presents and discusses an archaeological survey method to identify Roman marching camps in mountainous areas such as the Cantabrian Mountains (North of Spain). The advantages of a range of techniques for the detection of archaeological evidences related to the conquest of this territory by the Roman army are evaluated. Using different sources such as open access cartography, aerial photography materials, place names, local oral traditions and data from archaeological surface prospection, our research group has successfully developed a low cost protocol for identifying Roman marching camps. Ultimately, it is argued that this methodology could be transferable to other mountain areas

Proyecto de Investigación: La formación de los paisajes agrarios del Noroeste peninsular durante la Edad Media (siglos V al XII)

Presentamos los objetivos y los primeros resultados del proyecto de investigación La formación de los paisajes del Noroeste Peninsular durante la Edad Media (siglos V al XII). Exponemos los presupuestos teóricos y metodológicos de la arqueología agraria y nos acercamos a los resultados preliminares obtenidos en los tres casos de estudio abordados en nuestra investigación. [ABSTRACT] The paper introduces the aims and the preliminary outcomes of the research project entitled ‘The formation of agricultural landscapes in north western Iberia during the Middle Ages (V – XII centuries)’. Also, the text sets out the theoretical and methodological underpinnings of agrarian archaeology. Finally, the paper presents and explains the results achieved hitherto in the three archaeological case studies under investigation

La (re) significación de la proporcionalidad directa e inversa para docentes de la básica primaria, desde una mirada etnomatemática

El presente proyecto de investigación se realizó con la participación de docentes de la básica primaria, de la Institución Educativa Pascual Correa Flórez del municipio de Amagá – Antioquia quienes tenían a su cargo el área de matemáticas. La pregunta de investigación para tal propósito fue: ¿de qué manera los docentes de la básica primaria resignifican la proporcionalidad directa e inversa desde una mirada etnomatemática? Con ésta, analizar las formas como los docentes resignifican la proporcionalidad directa e inversa desde una mirada etnomatemática. Conjuntamente, asumimos para el desarrollo de la presente propuesta, un paradigma metodológico cualitativo enmarcado desde la perspectiva de la investigación acción educativa con fundamentos a partir de la etnomatemática. No obstante, para efectos de registros de la información, contamos con el apoyo de los docentes que orientan el área de matemáticas, en la básica primaria de la institución educativa antes mencionada. Donde se aplicaron instrumentos de producción de registros y de datos. En la misma dirección, para el logro de la presente propuesta se realizaron 4 visitas in situ a los docentes. Posteriormente para el análisis de los registros y la información suministrada, la realizamos teniendo en cuenta 4 aspectos considerados: I). El conocimiento disciplinar de los docentes sobre el objeto de estudio (proporcionalidad). II). La (Re) significación del objeto de estudio a través de sus prácticas áulicas. III. El uso del contexto en la enseñanza de la matemática (aportaciones desde la etnomatemática) y IV). La valoración de conocimientos extraescolares al interior del aula. Por consiguiente, consideramos que la experiencia vivida durante la realización del presente proyecto permitió generar en la mayoría de los docentes participantes, espacios de reflexión en torno al enriquecimiento de los significados de un objeto matemático, las diferentes formas de conducir la enseñanza desde la etnomatemática la inmersión de la cultura en el currículo de matemáticas, permitiendo de esta manera el fortalecimiento de la idiosincrasia, el reconocimiento de prácticas extraescolares y valores autóctonos de los grupos humanos.This research project was carried out with the participation of primary school teachers from the Pascual Correa Flórez educational institution in the municipality of Amagá - Antioquia who were in charge of the area of mathematics. The research question for this purpose was: how do primary school teachers re-signify direct and inverse proportionality from an ethnomathematical perspective? With this, to analyze the ways in which teachers enrich with other meanings and forms of life, the concept of proportionality from an ethnomathematical perspective. Jointly, a qualitative methodological paradigm was assumed for the development of the present proposal Framed from the perspective of research educational action based on ethnomathematics. However, for the purposes of production and registration of information, we have the support of the teachers who guide the area of mathematics, in the primary of the educational institution mentioned above. Where surveys, class observations, a paper, workshops, recordings, photographs and general reflections were carried out. In the same direction, for the accomplishment of the present proposal four on-site visits were made to the teachers. Subsequently, for the analysis of the records and the information provided, it was made taking into account four significant aspects: I). The disciplinary knowledge of the teachers about the object of study (proportionality). II). The (RE) meaning of the object of study through its aulic practices. III. The use of context in the teaching of mathematics (contributions from ethnomathematics) and IV). The valuation of extracurricular knowledge within the classroom. It was therefore considered that the experience during the implementation of the present project Allowed to generate in the participating teachers spaces of reflection on the enrichment of the meanings of a mathematical object, the different ways of conducting the teaching from the ethnomathematics The immersion of culture within the mathematics curriculum, thus allowing the strengthening of idiosyncrasy, recognition of extracurricular practices and indigenous values of human groups

DROMO formulation for planar motions: Solution to the Tsien Problem

The two-body problem subject to a constant radial thrust is analyzed as a planar motion. The description of the problem is performed in terms of three perturbation methods: DROMO and two others due to Deprit. All of them rely on Hansen?s ideal frame concept. An explicit, analytic, closed-form solution is obtained for this problem when the initial orbit is circular (Tsien problem), based on the DROMO special perturbation method, and expressed in terms of elliptic integral functions. The analytical solution to the Tsien problem is later used as a reference to test the numerical performance of various orbit propagation methods, including DROMO and Deprit methods, as well as Cowell and Kustaanheimo?Stiefel methods

Photobiotreatment model (PHBT): a kinetic model for microalgae biomass growth and nutrient removal in wastewater.

This article proposes a kinetic model for wastewater photobiotreatment with microalgae (the PhBT model). The PhBT model for nutrient uptake, coupled with the Verhulst growth model, is a simple and useful tool to describe batch experiments of nutrient removal by microalgae. The model has been validated with experiments of Chlorella vulgaris (C. vulgaris) grown in wastewater and different synthetic media. The model provided information about nitrogen and phosphorus limitation and their luxury uptake during the test. Productivity observed in synthetic medium (0.17 g SS L−1 d−1) was similar to that obtained in nutrient enriched wastewater (0.15 g SS L−1 d−1). Biomass productivity of this alga in wastewater and the efficient nutrient removal suggested that C. vulgaris could be cultured in wastewater for biomass production while nutrients are reduced from this stream

Photobiotreatment: influence of nitrogen and phosphorus ratio in wastewater on growth kinetics of Scenedesmus obliquus.

Nitrogen and phosphorus concentration in the effluent of a wastewater treatment plant can vary significantly, which could affect the growth kinetic and chemical composition of microalgae when cultivated in this medium. The aim of this work was to study the rate of growth, nutrient removal and carbon dioxide biofixation as well as biomass composition of Scenedesmus obliquus (S. obliquus) when it is cultivated in wastewater at different nitrogen and phosphorus ratio, from 1:1 to 35:1. A more homogeneous method for calculating productivities in batch reactors was proposed. The proper N:P ratio for achieving optimum batch biomass productivity ranged between 9 and 13 (263 and 322 mg L−1 d−1 respectively). This was also the ratio range for achieving a total N and P removal. Above and below this range (9–13) the maximum biomass concentration changed, instead of the specific growth rate.The maximum carbon dioxide biofixation rate was achieved at N:P ratio between 13 and 22 (553 and 557 mg CO2 L−1 d−1 respectively). Lipid and crude protein content, both depend on the aging culture, reaching the maximum lipid content (34%) at the lowest N:P (1:1) and the maximum crude protein content (34.2%) at the highest N:P (35:1)

Lipid Production of Microalga Ankistrodesmus falcatus Increased by Nutrient and Light Starvation in a Two-Stage Cultivation Process.

The aim of this work was to study the stimulation of lipid production on the microalga Ankistrodesmus falcatus by varying cultivation conditions during the stationary phase. The effect of three factors (presence and absence of nitrogen, phosphorus, and light) has been tested once the cultures reached the stationary phase with the aim to increase the value of the biomass for further applications. Lipid content, elemental composition, Nile red fluorescence evolution, and calorific value of microalgal biomass were studied as well as biomass growth. Biomass presented a lipid content of 36.54 % at the end of the first stage, while at the end of the second stage, the experiments with the absence of phosphorus increased their lipid content until 45.94 and 44.55 %, the first with nitrogen and light presence and the second with absence of all factors. The combination of phosphorus absence and nitrogen and light presence achieved the highest lipid productivity (20.27 mg/L/day). The two-stage strategy to culture microalgae is a feasible option to increase the economic or energetic value of biomass