93 research outputs found
Diagnóstico estratégico da produção de carne de cabrito da raça serrana
Este trabalho pretende realizar um diagnóstico estratégico do setor de carnes de cabrito Serrana. Os dados baseiam-se numa amostra de 70 criadores da região Norte de Trás-os-Montes. Os resultados do estudo revelam algumas debilidades estruturais no setor, como a reduzida escolaridade dos produtores, a ancianidade, o abandono da atividade, o baixo preço ao produtor ou mesmo as oscilações da procura. Efetivamente, de acordo com os indivíduos da nossa amostra, se agruparmos o envelhecimento dos produtores à diminuição do efetivo e ao abandono da atividade, a fragilidade do setor é enorme. Acresce alguma carência de visão e inovação, por parte dos agentes, nos diferentes elos do sistema de comercialização. Nenhum criador vende a carne através da internet, a retalho ou pré-embalada, não retendo para si o valor acrescentado da transformação. Assim, o escoamento do produto é praticamente assegurado pela qualidade da carne, que se tem apresentado como uma potencialidade irrefutável.This paper intends to perform a strategic diagnostic of the meat sector of Serrana goat
kid. The data is based on a sample of 70 breeders, members of the Association for the
Serrana goats (ANCRAS), from the Northern region of Trás-os-Montes. The study
findings reveal some structural weaknesses in the sector, such as low schooling of
farmers, old age, cessation of goat farming activity, low producer prices or demand
fluctuations. Indeed, according to our sample goat breeders, if we add the “goat breeders
aging” with “herd goat decrease” and “abandonment of the goat farming activity”, the
sector’s fragility is huge. Moreover, there are some lack of vision and innovation, by the
actors in different links of the marketing chain. No one of the farmers sells the meat over
the internet, retail or prepacked, so do not appropriate themselves of the added value of
processing. Indeed, the product marketing is essentially based on meat quality, which has
been presented as the sector main strength.Este trabalho foi financiado por: Projeto OPEN2PRESERVE - Modelo de gestión
sostenible para la preservación de paisajes abiertos de montaña (SOE2/P5/E0804). Os
autores agradecem à Fundação para a Ciência e a Tecnologia (FCT, Portugal) e ao
FEDER no âmbito do programa PT2020 pelo apoio financeiro ao CIMO
(UID/AGR/00690/2013).info:eu-repo/semantics/publishedVersio
Quantitative evaluation of the effects of positional versus orientational disorder on the scattering of acoustic phonons in disordered matter
The phonon scattering processes in the three solid phases of ethanol are investigated using thermal conductivity,
light, and neutron-scattering measurements as well as molecular dynamics simulations on single-
crystalline models for two crystalline modifications (fully ordered monoclinic and orientationally disordered
bcc phases). The orientationally disordered crystal is found to exhibit a temperature dependence of the
thermal conductivity that is remarkably close to that of a structurally disordered solid, especially at low temperatures.
This results, together with measurements of Brillouin linewidths as derived from light scattering
measurements, emphasize the role of orientational disorder in phonon scattering. The experimental results
obtained on polycrystal samples are then discussed with the aid of computer simulations on single-crystalline
models of both bcc and monoclinic crystals. Our findings are in good agreement with the wealth of thermodynamic
and dynamic data available so far, but at variance with the inferences drawn from inelastic x-ray
data on polycrystalline samples, where a common nature for the excitations in all phases is postulated
The Quaternary Active Faults Database of Iberia (QAFI v.2.0)
The Quaternary Active Faults Database of Iberia (QAFI) is an initiative lead by the Institute of Geology and Mines of Spain (IGME) for building a public repository of scientific data regarding faults having documented activity during the last 2.59 Ma (Quaternary). QAFI also addresses a need to transfer geologic knowledge to practitioners of seismic hazard and risk in Iberia by identifying and characterizing seismogenic fault-sources. QAFI is populated by the information freely provided by more than 40 Earth science researchers, storing to date a total of 262 records. In this article we describe the development and evolution of the database, as well as its internal architecture. Aditionally, a first global analysis of the data is provided with a special focus on length and slip-rate fault parameters. Finally, the database completeness and the internal consistency of the data are discussed. Even though QAFI v.2.0 is the most current resource for calculating fault-related seismic hazard in Iberia, the database is still incomplete and requires further review
The ALHAMBRA survey: evolution of galaxy clustering since z ~ 1
We study the clustering of galaxies as function of luminosity and redshift in the range 0.35 < z < 1.25 using data from the Advanced Large Homogeneous Area Medium-Band Redshift Astronomical (ALHAMBRA) survey. The ALHAMBRA data used in this work cover 2.38 deg2 in seven independent fields, after applying a detailed angular selection mask, with accurate photometric redshifts, σz ≲ 0.014(1 + z), down to IAB < 24. Given the depth of the survey, we select samples in B-band luminosity down to Lth ≃ 0.16L* at z = 0.9. We measure the real-space clustering using the projected correlation function, accounting for photometric redshifts uncertainties. We infer the galaxy bias, and study its evolution with luminosity. We study the effect of sample variance, and confirm earlier results that the Cosmic Evolution Survey (COSMOS) and European Large Area ISO Survey North 1 (ELAIS-N1) fields are dominated by the presence of large structures. For the intermediate and bright samples, Lmed ≳ 0.6L*, we obtain a strong dependence of bias on luminosity, in agreement with previous results at similar redshift. We are able to extend this study to fainter luminosities, where we obtain an almost flat relation, similar to that observed at low redshift. Regarding the evolution of bias with redshift, our results suggest that the different galaxy populations studied reside in haloes covering a range in mass between log10[Mh/( h−1 M⊙)] ≳ 11.5 for samples with Lmed ≃ 0.3L* and log10[Mh/( h−1 M⊙)] ≳ 13.0 for samples with Lmed ≃ 2L*, with typical occupation numbers in the range of ∼1–3 galaxies per halo
II Jornadas de la Sociedad Española para la Conservación y Estudio de Los Mamíferos (SECEM) Soria 7-9 diciembre 1995
Seguimiento de una reintroducción de corzo (Capreolus capreolus) en ambiente mediterráneo. Dispersión y área de campeoModelos de distribución de los insectívoros ern la Península IbéricaDieta anual del zorro, Vulpes vulpes, en dos hábitats del Parque Nacional de DoñanaDesarrollo juvenil del cráneo en las poblaciones ibéricas de gato montés, Felis silvestris Schreber, 1777Presencia y expansión del visón americano (Mustela vison) en las provincias de Teruel y Castellón (Este de España).Preferencias de hábitat invernal de la musaraña común (Crocidura russula) en un encinar fragmentado de la submeseta norteUso de cámaras automáticas para la recogida de información faunística.Dieta del lobo en dos zonas de Asturias (España) que difieren en carga ganadera.Consumo de frutos y dispersión de semillas de serbal (Sorbus aucuparia L.) por zorros y martas en la cordillera Cantábrica occidentalEvaluación de espermatozoides obtenidos postmorten en el ciervo.Frecuencia de aparición de diferentes restos de conejo en excrementos de lince y zorroAtlas preliminar de los mamíferos de Soria (España)Censo y distribución de la marmota alpina (Marmota marmota) en Navarra.Trampeo fotográfico del género Martes en el Parque Nacional de Aigüestortes i Estany de Sant Maurici (Lleida)Peer reviewe
A Ks-band-selected catalogue of objects in the ALHAMBRA survey
Large scale structure and cosmolog
Actas de las V Jornadas ScienCity 2022. Fomento de la Cultura Científica, Tecnológica y de Innovación en Ciudades Inteligentes
ScienCity es una actividad que viene siendo continuada desde 2018 con el objetivo de dar a conocer los conocimientos y tecnologías emergentes siendo investigados en las universidades, informar de experiencias, servicios e iniciativas puestas ya en marcha por instituciones y empresas, llegar hasta decisores políticos que podrían crear sinergias, incentivar la creación de ideas y posibilidades de desarrollo conjuntas, implicar y provocar la participación ciudadana, así como gestar una red internacional multidisciplinar de investigadores que garantice la continuación de futuras ediciones. En 2022 se recibieron un total de 48 trabajos repartidos en 25 ponencias y 24 pósteres pertenecientes a 98 autores de 14 instituciones distintas de España, Portugal, Polonia y Países Bajos.Fundación Española para la Ciencia y la Tecnología-Ministerio de Ciencia, Innovación y Universidades; Consejería de la Presidencia, Administración Pública e Interior de la Junta de Andalucía; Estrategia de Política de Investigación y Transferencia de la Universidad de Huelva; Cátedra de Innovación Social de Aguas de Huelva; Cátedra de la Provincia; Grupo de investigación TEP-192 de Control y Robótica; Centro de Investigación en Tecnología, Energía y Sostenibilidad (CITES
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