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Delhi, India

Risitano A.,University of Catania | Risitano G.,Applicate
Fatigue and Fracture of Engineering Materials and Structures

This work evaluates the limit stress of the thermo-elastic phase of deformation by thermo-analysing the surface of a specimen during a static traction test. By adding a temperature curve measured over a small area of the surface to the classical stress-strain curve, it is possible to evaluate a limit temperature T0 that is coincident with the beginning of the curve's nonlinear trend. The corresponding stress value is as estimation of the fatigue limit of the component under analysis. The authors derive an expression to evaluate temperature during a mono-axial static traction test. As an example, temperature curves recorded during traction tests performed on two notched steel specimens are reported and compared with this proposed expression. The change to the linearity in the temperature curve during the static traction test is evident in these examples and the corresponding stress value is an estimation of the fatigue limit of the component under analysis. © 2013 Wiley Publishing Ltd. Source

Puglisi-Allegra S.,University of Rome La Sapienza | Andolina D.,Fondazione Santa Lucia | Andolina D.,Applicate
Behavioural Brain Research

Coping is the necessary outcome of any stressful situation and the major determinant of stress resilience. Coping strategies can be divided into two broad categories, based on the presence (active) or absence (passive) of attempts to act upon the stressor. The role of brain serotonin (5-hydroxytryptamine, 5-HT) in coping behavior that is emerging from studies in animals and humans is the subject of this article. We have focused attention on studies that consider the coping behavior exhibited when the individual is faced with a new stressful experience. Coping styles characterize different species with different evolutionary histories, from fishes to mammals, and evidence shows that serotonin transmission in the central nervous system, with differences in transporter, receptor types and hormone or neurotransmitter influences is critical in determining coping behavior. Moreover, a major role of environmental challenges throughout the lifespan affects brain systems that control coping outcomes through 5-HT transmission. In particular early experiences, for their long-term effects in adulthood, and social experiences throughout the life span, for the effects on serotonin functioning, received attention in preclinical research because of their parallelism in humans and animals. Based on growing evidence pointing to a medial prefrontal cortex-amygdala system in mediating adaptive and maladaptive stress responses, we propose a brain circuit in which serotonin neurons in the dorsal raphe depending on the CRF (corticotropin releasing factor) regulatory action engage a prefrontal cortical-amygdala pathway through 5-HT1A receptors, GABA and Glutamate to moderate coping behavior. © 2014 Elsevier B.V. Source

Vaccari E.,Applicate
Palaeogeography, Palaeoclimatology, Palaeoecology

This paper presents an overview on some significant historical sources, particularly from 17th to 18th century Italian scientific literature, in order to understand how color was used as one of the 'external' features for identifying rock formations, also including fossils, regarded as having formed in different times by different causes or events. The reference to color was also considered the main feature used for lithostratigraphical purposes within the so called 'classifications' of mountains in the second half of the 18th century. Later geologists and mineralogists involved in the early development of stratigraphy referred to color when a rock formation or specimen appeared to be less distinguishable by other main characters (for example chemical and morphological features). © 2012 Elsevier B.V. Source

Gilio A.,Applicate
International Journal of Approximate Reasoning

In this paper we first recall some notions and results on the coherence-based probabilistic treatment of uncertainty. Then, we deepen some probabilistic aspects in nonmonotonic reasoning, by generalizing OR, CM, and Cut rules. We also illustrate the degradation of these inference rules when the number of premises increases. Finally, we show that the lower bounds obtained when applying OR and Quasi-Conjunction inference rules coincide, respectively, with Hamacher and Lukasiewicz t-norms; the upper bounds in both rules coincide with Hamacher t-conorm. © 2010 Elsevier Inc. All right reserved. Source

Agency: Cordis | Branch: H2020 | Program: SME-1 | Phase: DRS-17-2014-1 | Award Amount: 71.43K | Year: 2015

SENEX Project aims at the industrialization of an innovative table top explosive trace detector that exhibits remarkable and competitive performances in sensitivity and specificity, besides a compact and low-cost architecture. The SENEX device is based on surface plasmonic resonance phenomenon and it fills the growing need of security professionals to have the ability to detect a wide range of explosive substances and to be able to adapt as threats and their needs change. By the use of an innovative automatic microelectronic system based on nano-structured sensors, SENEX system is capable of continuously detecting and identifying explosives during a single analysis, while maintaining high sensitivity. SENEX device has the potential to satisfy all the requirements for the trace detection of explosives because it can overcome all the technical and commercial barriers connected to use of conventional sensors based techniques: Ion Mobility Spectrometry, Gas Chromatography, Computer Tomography, Colorimetry and Chemi-Luminescence. Most of the existing devices are bulky, expensive and require long lasting procedures and complex training activities in the start-up phase. SENEX technology first key market application is transportation security in airports and harbours to detect explosives, weapons, and illegal items in baggage or on passengers, airports threat areas are; another key market application is the freight terminal sectors where currently security explosive controls are often lacking.

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