Preliminary Ground Motion Measurements at LNF Site for the Super B Project

TUPEA067International audienceFol­low­ing pre­vi­ous mea­sure­ments, more de­tailed pre­lim­i­nary ground mo­tion mea­sure­ments have been per­formed at the LNF site for the Super B pro­ject site char­ac­ter­i­za­tion. First, re­sults of ver­ti­cal ground mo­tion mea­sure­ments done dur­ing 18 hours are shown in order to get an idea of the evo­lu­tion of the ground mo­tion am­pli­tude with time. Sec­ond­ly, mea­sure­ments of ground mo­tion (in the 3 di­rec­tions of space) were per­formed at dif­fer­ent lo­ca­tions on sur­face in order to eval­u­ate and to com­pare the in­flu­ence of var­i­ous vi­bra­tion sources. Then, re­sults of ground mo­tion co­her­ence mea­sured for dif­fer­ent dis­tances at two lo­ca­tions close to each other but with soft and rigid floor are com­pared. These mea­sure­ments are also com­pared to the ones done in the ATF2 beam line where a spe­cial floor was built for sta­bil­i­ty. By this way, the re­sults re­veal that the LNF is a good site to use ground mo­tion co­her­ence prop­er­ties for sta­bil­i­ty like it has been done for ATF2

Caratterizzazione microstrutturale e prove di resilienza su giunti Friction Stir Welding e Linear Friction Welding di compositi a matrice metallica

In questo studio sono stati caratterizzati giunti Friction Stir Welding e Linear Friction Welding su compositi a matrice in lega di alluminio e rinforzo particellare ceramico. Il processo FSW è stato applicato a due compositi ottenuti con processo fusorio, quindi estrusi e trattati termicamente T6: AA6061/20%vol.Al2O3p e AA7005/10%vol.Al2O3p. I giunti LFW sono stati invece realizzati su un composito con matrice in lega di alluminio e rinforzo particellare in carburo di silicio, ottenuto mediante metallurgia delle polveri, quindi forgiato e trattato termicamente T4: AA2124/25%vol.SiCp. Sono stati esaminati gli effetti della saldatura sullecaratteristiche microstrutturali dei giunti, avvalendosi di tecniche di microscopia ottica con analisi di immagine e di microscopia elettronica in scansione (SEM) con microsonda a dispersione di energia (EDS). Sono state quindi condotte prove di resilienza con pendolo strumentato Charpy. Lo studio dei meccanismi di danneggiamento è stato effettuato mediante analisi al SEM delle superfici di frattura. Entrambi i processi di saldatura hanno portato a giunti sostanzialmente esenti da difetti. La microstruttura dei cordoni è risultata dipendente sia dalle caratteristiche microstrutturali iniziali dei compositi considerati, sia dalla tipologia di processo di saldatura. Nel caso dei compositi AA6061/20%Al2O3p e AA7005/10%Al2O3p saldati FSW si è osservato un sostanziale incremento di resilienza, rispetto al materiale base, in conseguenza dell’affinamento dei grani della matrice, della riduzione della dimensione media delle particelle di rinforzo e della loro spigolosità, indotte dal processo di saldatura. Il composito AA2124/25%SiCp saldato LFW ha presentato valori di resilienza confrontabili con quelli del materiale base, in conseguenza, soprattutto, dei limitati effetti della saldatura su dimensione e distribuzione delle particelle di rinforzo

First craneal evidence and documented occurrence of Cuniculus paca (Rodentia, Cuniculidae) for the Humid Chaco region of Argentina

Se reporta el primer registro con material de referencia de Cuniculus paca para la provincia de Formosa en la Región Chaqueña Argentina. Este se basa en un cráneo colectado y en 18 fotografías obtenidas con trampas cámaras en la selva en galería del riacho Pilagá (estancia Guaycolec: 25° 58’ S, 58° 11’ O) ubicada en la macrounidad ambiental del Chaco Húmedo. Se caracterizó el patrón de actividad de la especie a partir de los registros horarios de las fotografías. Se observó un patrón de actividad estrictamente nocturno, aparentemente influenciado por el ciclo lunar; no se obtuvo ningún registro fotográfico durante períodos de luna llena o luna nueva. Todas las fotos fueron obtenidas a una distancia máxima de 170 m del río, indicando una fuerte asociación de la especie con los cursos de aguaWe report the first record of Cuniculus paca for the province of Formosa in Argentina and the Argentinean Gran Chaco region based on one skull found close to the river Pilagá (estancia Guaycolec: 25° 58’ S, 58° 11’ W) and on 18 photos taken by camera traps. Since the photos include time-stamps, we were able to evaluate the activity pattern of the paca in that area. Pacas showed strict nocturnal behavior and seemed to be influenced by the lunar cycles; there were no records during full and new moon. All photos were taken at a maximum distance of 170 m to the river, confirming the strong association of the species to watercourses.Fil: Huck, Maren. Deutsches Primatenzentrum; AlemaniaFil: Juárez, Cecilia Paola. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste. Centro de Ecología Aplicada del Litoral. Universidad Nacional del Nordeste. Centro de Ecología Aplicada del Litoral; Argentina. Barrio General José de San Martín. Proyecto Mirikiná; ArgentinaFil: Rotundo, Marcelo A.. Barrio General José de San Martín. Proyecto Mirikiná; ArgentinaFil: Fernandez Duque, Eduardo. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Barrio General José de San Martín. Proyecto Mirikiná; Argentina. University of Pennsylvania; Estados Unido

Till death (or an intruder) do us part: intrasexual-competition in a monogamous Primate

Polygynous animals are often highly dimorphic, and show large sex-differences in the degree of intra-sexual competition and aggression, which is associated with biased operational sex ratios (OSR). For socially monogamous, sexually monomorphic species, this relationship is less clear. Among mammals, pair-living has sometimes been assumed to imply equal OSR and low frequency, low intensity intra-sexual competition; even when high rates of intra-sexual competition and selection, in both sexes, have been theoretically predicted and described for various taxa. Owl monkeys are one of a few socially monogamous primates. Using long-term demographic and morphological data from 18 groups, we show that male and female owl monkeys experience intense intra-sexual competition and aggression from solitary floaters. Pair-mates are regularly replaced by intruding floaters (27 female and 23 male replacements in 149 group-years), with negative effects on the reproductive success of both partners. Individuals with only one partner during their life produced 25% more offspring per decade of tenure than those with two or more partners. The termination of the pair-bond is initiated by the floater, and sometimes has fatal consequences for the expelled adult. The existence of floaters and the sporadic, but intense aggression between them and residents suggest that it can be misleading to assume an equal OSR in socially monogamous species based solely on group composition. Instead, we suggest that sexual selection models must assume not equal, but flexible, context-specific, OSR in monogamous species.Wenner-Gren Foundation, L.S.B. Leakey Foundation, the National Geographic Society, National Science Foundation (BCS- 0621020), the University of Pennsylvania Research Foundation and the Zoological Society of San Diego, German Science Foundation (HU 1746-2/1

Delivery status of the ELI-NP gamma beam system

International audienceThe ELI-NP GBS is a high intensity and monochromatic gamma source under construction in Magurele (Romania). The design and construction of the Gamma Beam System complex as well as the integration of the technical plants and the commissioning of the overall facility, was awarded to the Eurogammas Consortium in March 2014. The delivery of the facility has been planned in for 4 stages and the first one was fulfilled in October 31st 2015. The engineering aspects related to the delivery stage 1 are presented

A Biased Review of Sociophysics

Various aspects of recent sociophysics research are shortly reviewed: Schelling model as an example for lack of interdisciplinary cooperation, opinion dynamics, combat, and citation statistics as an example for strong interdisciplinarity.Comment: 16 pages for J. Stat. Phys. including 2 figures and numerous reference

Building Babies - Chapter 16

In contrast to birds, male mammals rarely help to raise the offspring. Of all mammals, only among rodents, carnivores, and primates, males are sometimes intensively engaged in providing infant care (Kleiman and Malcolm 1981). Male caretaking of infants has long been recognized in nonhuman primates (Itani 1959). Given that infant care behavior can have a positive effect on the infant’s development, growth, well-being, or survival, why are male mammals not more frequently involved in “building babies”? We begin the chapter defining a few relevant terms and introducing the theory and hypotheses that have historically addressed the evolution of paternal care. We then review empirical findings on male care among primate taxa, before focusing, in the final section, on our own work on paternal care in South American owl monkeys (Aotus spp.). We conclude the chapter with some suggestions for future studies.Deutsche Forschungsgemeinschaft (HU 1746/2-1) Wenner-Gren Foundation, the L.S.B. Leakey Foundation, the National Geographic Society, the National Science Foundation (BCS-0621020), the University of Pennsylvania Research Foundation, the Zoological Society of San Dieg

Spatial interactions in agent-based modeling

Agent Based Modeling (ABM) has become a widespread approach to model complex interactions. In this chapter after briefly summarizing some features of ABM the different approaches in modeling spatial interactions are discussed. It is stressed that agents can interact either indirectly through a shared environment and/or directly with each other. In such an approach, higher-order variables such as commodity prices, population dynamics or even institutions, are not exogenously specified but instead are seen as the results of interactions. It is highlighted in the chapter that the understanding of patterns emerging from such spatial interaction between agents is a key problem as much as their description through analytical or simulation means. The chapter reviews different approaches for modeling agents' behavior, taking into account either explicit spatial (lattice based) structures or networks. Some emphasis is placed on recent ABM as applied to the description of the dynamics of the geographical distribution of economic activities, - out of equilibrium. The Eurace@Unibi Model, an agent-based macroeconomic model with spatial structure, is used to illustrate the potential of such an approach for spatial policy analysis.Comment: 26 pages, 5 figures, 105 references; a chapter prepared for the book "Complexity and Geographical Economics - Topics and Tools", P. Commendatore, S.S. Kayam and I. Kubin, Eds. (Springer, in press, 2014