Broadcast cancellation in search mechanisms

Searching for resources over unstructured networks is usually supported by broadcast communication primitives. Ideally, the broadcast process should be cancelled as soon as possible after a successful discovery, to avoid ooding the entire network. However, cancelling an ongoing broadcast is challenging and may increase the number of exchanged messages. In this paper, we compare the cancellation mechanisms used by BERS and BERS? With new proposed cancellation approaches BCIR and BCIR? The formulation of a simplified analytical model and the simulation results show that:i)it is possible to reduce the number of retransmitted messages, without increasing the latency observed in BERS?; and ii) BCIR is more energy eficient, which can contribute to extend the availability of mobile battery powered devices.Fundação para a Ciência e Tecnologia, Portugal (PEst- OE/EME/UI4005/2011) and carried out within the research Centro Lusíada de Investigação e Desenvolvimento em Engenharia e Gestão Industrial (CLEGI

Vibration propagation in discrete element particle models of rock

Vibrations in rock masses can be a significant hazard, leading to human discomfort and structural damage. Recent cases of subway excavation or tunnel excavation near existing dams in Portugal have raised again the importance of this topic. Traditional statistical tools have been used to study wave propagation in rock, but fall short when rock fracturing or faulting radically changes the way vibration propagates. Numerical models such as finite-element or finite-difference models also have some insufficiencies, namely in the way discontinuities are represented. We propose the utilization of bonded particle models based on the Particle Discrete Element Method. Synthetic rock samples are generated and their static elastic properties are calibrated by manipulating micro-properties (assembly organization and normal and shear contact stiffness). The static and dynamic properties of the rock cores are tested and the complete elastic response of the model is evaluated and discussed

Efecto del tipo tinta y de las propiedades del papel estucado de alta gama en la calidad de impresión

En los últimos años, el gran desarrollo tecnológico experimentado por el sector de la impresión offset, unido a que cada vez los costes de producción son más ajustados, ha producido un aumento de la exigencia de la calidad del papel. La calidad de impresión de un papel estucado se evalúa mediante la densidad, las coordenadas colorimétricas y el brillo de la impresión. El objetivo del estudio fue determinar la influencia de las propiedades del papel estucado y de la tinta sobre las propiedades que definen la calidad de la impresión. Para ello se seleccionaron ocho papeles estucados (5 brillantes y 3 mates) y se determinaron la rugosidad y la energía libre de superficie de los mismos. Posteriormente se imprimieron con cantidades crecientes de tinta en un IGT, con dos tintas de color negro y dos cian. Por último se determinaron la densidad, el brillo y las coordenadas CIELAB de la impresión. La variación de densidad, brillo, L* a* y b* de la impresión con la tinta transferida presenta tendencias similares en todos los papeles, existiendo diferencias en la impresión en función del tipo de tinta. Las propiedades de impresión dependen principalmente de la lisura Bekk y de la componente polar de la energía de superficie

The role of food transfers in wild golden lion tamarins (Leontopithecus rosalia) : support for the informational and nutritional hypothesis

Funding; The research was supported in part by a grant from the John Templeton Foundation (40128) and the European Research Council (232823), to KN Laland, and is in compliance with ASAB and ICMBio guidelines.Callitrichidae is a unique primate family not only in terms of the large number of food transfers to infants but also for the prevalence of transfers that are initiated by the adults. It has been hypothesized that, as well as provisioning infants, callitrichid food transfers might function to teach the receiver what food types to eat. If food provisioning has a teaching function, we would expect successful food transfers to be more likely with food types that are novel to the juveniles. We would also expect juveniles to learn about foods from those transfers. We introduced different types of food (some familiar, some novel) to wild groups of golden lion tamarins (Leontopithecus rosalia). While novel foods were not more successfully transferred than familiar food in the experiment, transfers were more successful (i.e., the receiver obtained food) when the donor had previous experience with that food. Moreover, we found evidence suggesting that food transfers influenced the future foraging choices of juveniles. Our findings are consistent with the first and third criteria of the functional definition of teaching, which requires that tutors (the adults) modify their behavior in the presence of a naïve individual (a juvenile), and that the naïve individual learns from the modified behavior of the demonstrator. Our findings are also consistent with the provisioning function of food transfer. Social learning seems to play an important role in the development of young tamarins’ foraging preferences.Publisher PDFPeer reviewe

Binuclear Cu2+ complex mediated discrimination between L-glutamate and L-aspartate in water

L-Glutamate and L-aspartate selectivity is achieved by the action of two Cu2+ metal ions rightly disposed in a cyclophanetype macrocyclic framework; electrochemical sensing of glutamate has been achieved by adsorption of the copper complexes on graphite electrodes.Verdejo Viu, Begoña, [email protected] ; Domenech Carbo, Antonio, [email protected] ; Jimenez Garcia, Hermas Rafael, [email protected] ; Soriano Soto, Concepción, [email protected] ; Garcia-España Monsonis, Enrique, [email protected]

Biometric evaluation of morpho-agronomic traits in pepper lines and hybrids

Objetivou-se avaliar linhagens e h?bridos de pimenta (Capsicum chinense e C. annuum) afim de obter informa??es sobre o desempenho agron?mico, heterose, heterobeltiose, correla??es fenot?picas e dissimilaridade gen?tica. Foram avaliadas as linhagens PIM-030, BGH-433, BGH-4285, Numex Sweet, Numex Garnet e os h?bridos simples Numex Sweet x PIM-030, Numex Garnet x PIM-030 e BGH-4285 x BGH-433. O experimento foi conduzido com oito tratamentos e quatro repeti??es, em casa de vegeta??o, no campus JK da UFVJM. Foram avaliadas 22 caracter?sticas morfoagron?micas. No h?brido BGH-4285 x BGH-433 foi observado maior heterose e heterobeltiose para produtividade total de frutos e produtividade de massa seca total de frutos, sendo interessante aos futuros programas de melhoramento. Observa-se que plantas de maior porte tendem a ser mais produtivas com maiores massas fresca dos frutos e frutos com pericarpo mais espesso, frutos maiores com maiores pedicelos e com sementes mais densas, sendo importante para a produ??o de p?prica. As linhagens BGH-433, BGH-4285 e PIM-030 s?o as mais recomendadas para uso em programas de melhoramento.In this study, we aimed to evaluate pepper lines and hybrids (Capsicum chinense and C. annuum) in order to obtain information on agronomic performance, heterosis, heterobeltiosis, phenotypic correlations and genetic dissimilarity. We evaluated lines PIM-030, BGH-433, BGH-4285, Numex Sweet, Numex Garnet and simple hybrids Numex Sweet x PIM-030, Numex Garnet x PIM-030 and BGH-4285 x BGH-433. The research was conducted with eight treatments and four replications in a greenhouse, at campus JK of UFVJM. Twenty two agronomic traits were evaluated. The hybrid BGH-4285 x BGH-433 presents higher heterosis and heterobeltiosis for total fruit productivity and productivity of total fruit dry mass, information of great value for future breeding studies. The authors noticed that larger plants tend to be more productive and present higher fruit fresh mass and also fruits with thicker pericarp, as well as larger fruits having longer pedicels with denser seeds, important for production of paprika. Lines BGH-433, BGH-4285 and PIM-030 are the most recommended to be used in breeding programs

Food addiction and lifetime alcohol and illicit drugs use in specific eating disorders

Background and aims: Food addiction (FA) and substance use (SU) have frequently been reported in patients with eating disorders (EDs). Our study aimed to assess the prevalence rates of FA and/or lifetime problematic alcohol and illicit drug use among patients with specific ED, such as: bulimia nervosa (BN), binge eating disorder (BED), and other specified feeding and eating disorder (OSFED). We sought to identify clinical, psychopathological, and personality profiles involved in these addictive behavior-based phenotypes. Methods: The total sample was 527 patients (176 BN, 115 BED, and 236 OSFED). FA was assessed through the Yale Food Addiction Scale 2.0. To determine lifetime SU, a semi structured clinical interview was carried out. Results: Patients with BN had the highest rates of FA both with and without SU. No gender differences were obtained for the prevalence of current FA and/or lifetime SU. Patients reporting at least one addictive-related behavior exhibited increased clinical severity compared to those who reported none. Increased impulsivity (such as high lack of premeditation, sensation seeking, and positive urgency) and low self-directedness were differentiating factors for presenting one or two addictive behaviors. Discussion and Conclusions: Overall, patients presenting with at least one addictive-like behavior reported a poorer clinical status than those without. Also, patients with FA and SU exhibited a more dysfunctional profile characterized by high impulsivity and low selfdirectedness. These findings would support the need for targeted treatments to reduce impulsivity and increase self-directedness, especially in patients with any addictive-related behavior, as a step towards improving their treatment outcome

Anti-TNF-alpha-adalimumab therapy is associated with persistent improvement of endothelial function without progression of carotid intima-media wall thickness in patients with rheumatoid arthritis refractory to conventional therapy

To determine whether treatment with the anti-TNF-alpha blocker adalimumab yields persistent improvement of endothelial function and prevents from morphological progression of subclinical atherosclerosis in patients with rheumatoid arthritis (RA) refractory to conventional therapy, a series of 34 consecutive RA patients, attending hospital outpatient clinics and who were switched from disease modifying antirheumatic drug therapy to anti-TNF-alpha-adalimumab treatment because of severe disease, were assessed by ultrasonography techniques before the onset of adalimumab therapy (at day 0) and then at day 14 and at month 12. Values of flow-mediated endothelium-dependent vasodilatation at day 14 and at month 12 were significantly higher (mean ± standard deviation (SD): 6.1 ± 3.9%; median: 5.7% at day 14, and mean ± SD: 7.4 ± 2.8%; median: 6.9% at month 12) than those obtained at day 0 (mean: 4.5 ± 4.0%; median: 3.6%; P = 0.03 and P < 0.001, resp.). Endothelium-independent vasodilatation results did not significantly change compared with those obtained at day 0. No significant differences were observed when carotid artery intima-media wall thickness values obtained at month 12 (mean ± SD: 0.69 ± 0.21 mm) were compared with those found at day 0 (0.65 ± 0.16 mm) (P = 0.3). In conclusion, anti-TNF-alpha-adalimumab therapy has beneficial effects on the development of the subclinical atherosclerosis disease in RA