MODASC: ASIC for mobile data acquisition systems using satellite communications

MODASC is an ASIC that performs wide area mobile data acquisition using satellite communication to provide global coverage. This circuit provides two operation modes: an autonomous mode, that periodically establishes connection with the control center, and a slave mode, working as a peripheral connected to a general purpose micro controller. This experiment has been realized under FUSE special action in collaboration with SAINSEL

Off-equilibrium fluctuation-dissipation relations in the 3d Ising Spin Glass in a magnetic field

We study the fluctuation-dissipation relations for a three dimensional Ising spin glass in a magnetic field both in the high temperature phase as well as in the low temperature one. In the region of times simulated we have found that our results support a picture of the low temperature phase with broken replica symmetry, but a droplet behavior can not be completely excluded.Comment: 9 pages, 11 ps figures, revtex. Final version to be published in Phys. Rev.

White dwarf spectral type-temperature distribution from Gaia-DR3 and the Virtual Observatory

The characterization of white dwarf atmospheres is crucial for accurately deriving stellar parameters such as effective temperature, mass, and age. We aim to classify the population of white dwarfs up to 500 pc into hydrogen-rich or hydrogen-deficient atmospheres based on Gaia spectra and to derive an accurate spectral type-temperature distribution of white dwarfs as a function of the effective temperature for the largest observed unbiased sample of these objects. We took advantage of the recent Gaia low-resolution spectra available for 76,657 white dwarfs up to 500 pc. We calculated synthetic J-PAS narrow-band photometry and fitted the spectral energy distribution of each object with up-to-date models for hydrogen-rich and helium-rich white dwarf atmospheres. We estimated the probability for a white dwarf to have a hydrogen-rich atmosphere and validated the results using the Montreal White Dwarf Database. Finally, precise effective temperature values were derived for each object using La Plata evolutionary models. We have successfully classified a total of 65,310 white into DAs and non-DAs with an accuracy of 94%. An unbiased subsample of nearly 34,000 objects was built, from which we computed a precise spectral distribution spanning an effective temperature range from 5,500 to 40,000 K, while accounting for potential selection effects. Some characteristic features of the spectral evolution, such as the deficit of helium-rich stars at T_eff $\approx$35,000-40,000 K and in the range 22,000 < T_eff < 25,000 K, as well as a gradual increase from 18,000K to T_eff $\approx$7,000K, where the non-DA stars percentage reaches its maximum of 41%, followed by a decrease for cooler temperatures, are statistically significant. These findings will provide precise constraints for the proposed models of spectral evolution.Comment: 7 pages, 11 pages. Accepted for publication in A&

Ships confining an oil spill over: A scenario for automatized cooperation

Cooperation between robots is an important contemporary issue. This can be translated to the marine environment, either using marine robots or introducing automatics in the operations of ships. A general research on this kind of problems has started in our group, after several years of developing autonomous robotized ships. Several scenarios have been proposed for the study of cooperation details. This paper focus in a very interesting case, which is representative of other cases: several ships towing booms for oil spill over confinement. It turns out that the cooperation problem is not trivial. Along the operation several phases can be distinguished, and several coordination problems and needs appear. A computer simulation has been developed, after physics based analysis, and some initial coordinated control strategies have been proposed and tested. These strategies are supposed to be applied through verbal orders to captains. Along the operation phases the role of captains change, for an adaptive coordination. The paper introduces the research topic, then describes the scenario and its simulation, then focus on the cooperation problems emerging from the operation phases and the control and coordination solutions that have been proposed, and finally draws some conclusions

Epidemiología de tumor venéreo transmisible canino en Reynosa Tamaulipas México

The CTVT is transmitted mainly through sexual contact, with females being the most exposed to the pathology; vincristine sulfate is currently the most effective therapy. In the present work, 28 canines were analyzed, mostly of indefinite breed. A diagnosis was made by complete physical examination and sur­veys were carried out on their owners to determine risk factors. The proportion of the disease was similar in females and males under 5 years of age, but considerably higher in adult males than in females; only 25% of those older than 5 years were female. The incidence of this tumor in non-sterilized animals was 28% higher than in sterilized ones. The presence of the tumor was considerably higher in non-rescued males compared to females in the same condition (73 and 27%). Finally, 89% of the reported cases presented lesions in the genital region. The objective of this work was to identify factors associated with the persistence of CTVT in the city of Reynosa Tamaulipas.El CTVT por sus siglas en inglés (Canine Transmissible Venereal Tumor) se transmite principalmente a través de contacto sexual siendo las hembras las más expuesta a la patología; el sulfato de vincristina es actualmente la terapia más eficaz. En el presente trabajo se analizaron 28 caninos, en su mayoría de raza indefinida; se realizó diagnóstico por reconocimiento físico completo y se realizaron encuestas a sus propietarios para determinar factores de riesgo. La proporción de la enfermedad fue similar en hembras y machos menores de 5 años pero considerablemente mayor en machos adultos con respecto a hembras; solo el 25% de los mayores de 5 años fueron hembras. La incidencia de este tumor en animales no esterilizados fue un 28% mayor con respecto a los esterilizados. La presencia del tumor fue considerablemente más alta en machos no rescatados con respecto a hembras en la misma condición (73 y 27%). Finalmente, el 89% de los casos reportados presentaron las lesiones en la región genital. El objetivo del presente trabajo fue identificar factores asociados a persistencia de CTVT en la ciudad de Reynosa Tamaulipas

Physics demos for all UVEG degrees: a unique project in Spain

The Physics Demo Project at the University of Valencia (www.uv.es/fisicademos) has developed a collection of physics demonstrations to be used during lectures. It consists of more than 130 experimental demos about different physics topics. More than 30 professors borrow them whenever they lecture on physics in any of our 40 courses in 17 different science or technical degrees, involving 246 ECTS and more than 3500 students. Each demo kit with a simple experimental set displays a particular physics phenomenon. An on-line user guide highlights the main physics principles involved, instructions on how to use it and advices of how to link it to the theoretical concepts or to technical applications. Demo lectures (and collections) are a usual and widespread practice in many countries but not in Spain. This unique initiative aims at the recovery of this practice by involving a growing collaborative team of users and with the aid of educational innovation projects. Here we explain the project content, organization and recent developments. Our experience, together with the positive students comments, allows us to draw the following conclusions: demos introduce the real sensible world in the lecture hall, providing the necessary link between concepts and everyday life, and becoming, again, something more than "chalk and talk"

Actualistic taphonomic study of the rodents digested by the Achala culpeo fox (Lycalopex culpaeus smithersi) in the highlands of central Argentina

We present the first actualistic study of the rodents consumed by the South American foxLycalopex culpaeus smithersi (Achala culpeo fox), a subspecies of the culpeo fox that is endemicto the highlands of central Argentina. We provide a taphonomic characterization of this canidbased on digested micromammal bones, and compare it to other carnivores. We studied over 1000bones derived from 83 scats collected in Quebrada del Condorito National Park, Córdobaprovince, Argentina, corresponding to caviomorph and myomorph rodents. Galea leucoblepharawas the main prey (59.8% MNI, 93.1% biomass). Average relative abundance for the totalassemblage was 26.7. Cranial and, to a lesser extent, proximal limb bones were the most abundantelements. A high degree of breakage was observed in cranial elements and, to a lesser extent, inlimb bones. A high proportion of heavy and extreme digestion was inferred, while some elementsbear light or no digestion traces at all. Overall, the Achala culpeo fox fits best with othermammalian carnivores in the category of extreme modification, and shows types and proportionsof taphonomic attributes similar to other South American mammalian predators. These resultscontribute to the understanding of regional taphonomic processes and of digestivemodifications by Lycalopex foxes generally, and are thus relevant to interpreting the presence of micromammal remains in the archaeological and palaeontological recordsand the impact of these foxes in their formation.Fil: Coll, Daiana Geraldine. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; ArgentinaFil: Montalvo, Claudia Inés. Universidad Nacional de La Pampa. Facultad de Ciencias Exactas y Naturales; ArgentinaFil: Fernández, Fernando Julián. Universidad de Buenos Aires. Facultad de Ingeniería; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Pia, Monica Valeria. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Ciencias de la Tierra y Ambientales de La Pampa. Universidad Nacional de La Pampa. Facultad de Ciencias Exactas y Naturales. Instituto de Ciencias de la Tierra y Ambientales de La Pampa; ArgentinaFil: Mondini, Nora Mariana. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Antropología de Córdoba. Universidad Nacional de Córdoba. Facultad de Filosofía y Humanidades. Instituto de Antropología de Córdoba; Argentin

Calidad de la carne en corderos suplementados con tres concentraciones de zinc en una dieta energética

Objective: To evaluate the effect of three doses of Zn supplemented in the diet on the quality and concentration of Zn in meat. Design / methodology / approach: 3 doses of Zn were supplemented: a) 21 mg Zn / Kg of dry matter (DM) from diet only, b) Zn80 (diet + ZnSO4) and c) Zn400 (diet + ZnSO4). Twelve Katahdin lambs randomly distributed in three groups, weighing 29.72 ± 2.16 Kg and age 9 ± 1 months. The consumed DM was restricted for all lambs to 718.62 ± 10.84 g. Findings / Conclusion: The luminosity of the psoas major muscle was Zn21 = 36.50, Zn80 = 38.14 and Zn400 = 35.35 (quadratic effect, P &lt;0.01). The redness of the psoas major muscle was between 18.81 to 19.72 and the intensity of the yellow color was from 3.63 to 3.82. The pH of the gracilis and psoas major muscles were 6.21 and 6.91 and there were no differences in pH, lightness and hardness. The water retention capacity of the gracilis muscle was Zn21 = 63.68%, Zn80 = 65.32% and Zn400 = 83.80% (linear effect, P &lt;0.05). The 80 mg / kg dose of Zn improved the Zn content in meat.Objetivo: Evaluar el efecto de tres dosis de Zn suplementado en la dieta sobre la calidad y concentración de Zn en la carne. Diseño/metodología/aproximación: Se suplementaron 3 dosis de Zn: a) 21 mg Zn/Kg de materia seca (MS) proveniente de la dieta solamente, b) Zn80 (dieta + ZnSO4) y c) Zn400 (dieta + ZnSO4). Doce corderos de raza Katahdin distribuidos aleatoriamente en tres grupos, con peso de 29.72 ± 2.16 Kg y edad de 9 ± 1 meses. La MS consumida fue restringida para todos los corderos a 718.62 ± 10.84 g. Hallazgos/conclusión: La luminosidad del músculo psoas major fue Zn21 = 36.50, Zn80 = 38.14 y Zn400 = 35.35 (efecto cuadrático, P &lt; 0.01). El enrojecimiento del músculo psoas major fue entre 18.81 a 19.72 y la intensidad del color amarillo fue de 3.63 a 3.82. El pH de los músculos gracilis y psoas major fueron de 6.21 y 6.91 y no hubo diferencias en el pH, luminosidad y dureza. La capacidad de retención de agua del músculo gracilis fue Zn21 = 63.68 %, Zn80 = 65.32 % y Zn400 = 83.80 % (efecto lineal, P &lt; 0.05). La dosis de 80 mg/kg de Zn mejoró el contenido de Zn en la carne