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Search Results: 1 - 10 of 421 matches for " Sebastiano Laviola "
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The treatment of SMEs loans in the New Basel Capital Accord: some evaluations
Fabrizio Fabi,Sebastiano Laviola,Paolo Marullo Reedtz
PSL Quarterly Review , 2004,
Abstract: In April 2003 the Basel Committee on Banking Supervision issued a third consultative paper on the new Basel Capital Accord (Basel II). The document contains substantial changes with respect to the previous proposal of January 2001, on which improvements were requested, among other aspects, regarding the too severetreatment foreseen for loans to small and medium sized enterprises (SMEs). The aim of this paper is to analyse the treatment of SME loans under the Basel II framework and to provide an empirical evaluation of the impact of the different proposals on a large hypothetical portfolio of Italian corporations. Our simulations indicate that the prudential treatment of SME loans foreseen in the last consultative document of theBasel Committee is not penalizing with respect to the current situation. Therefore, we should not expect a reduction of credit or an increase in interest rates on loans to this type of borrowers.
Stress testing credit risk: experience from the italian FSAP
Sebastiano Laviola,Juri Marcucci,Mario Quagliariello
PSL Quarterly Review , 2006,
Abstract: Article originally published in the volume 59 issue 238 of Banca Nazionale del Lavoro Quarterly Review (also known as BNL Quarterly Review).
Black Body Quantum Fluctuations and Relativity  [PDF]
Sebastiano Tosto
Journal of Modern Physics (JMP) , 2016, DOI: 10.4236/jmp.2016.713152
Abstract: The paper introduces a simple theoretical model aimed to provide a possible derivation of the quantum fluctuations of the black body radiation. The model offers the chance of inferring and linking contextually quantum and relativistic results.
Reappraising 1907 Einstein’s Model of Specific Heat  [PDF]
Sebastiano Tosto
Open Journal of Physical Chemistry (OJPC) , 2016, DOI: 10.4236/ojpc.2016.64011
Abstract: This article emphasizes that the Einstein and Debye models of specific heats of solids are correlated more tightly than currently acknowledged. This correlation is evidenced without need of additional hypotheses on the early Einstein model. The results are also extensible to the case of a system of fermions; as an example, the specific heat of the electron sea in metals is inferred in the frame of the proposed approach only.
Many Electron Atoms: Ionization Energies of Transition Elements  [PDF]
Sebastiano Tosto
Open Journal of Physical Chemistry (OJPC) , 2017, DOI: 10.4236/ojpc.2017.73007
Abstract: The paper introduces a theoretical model aimed to calculate the ionization energies of many electron atoms and their ions. The validity of the model, which implements the statistical formulation of the quantum uncertainty to infer a simple formula of ionization energy, has been already proven in a previous paper comparing systematically experimental and calculated values for elements with atomic numbers 2Z≤29, whose electron configurations include all ions with numbers ne of electrons 2neZ. The present paper enhances and extends the results previously obtained; the approach is now generalized to include even the transition elements and in particular the lanthanides and actinides. The validity of the proposed model is proven examining all experimental data of ionization energies of these elements and their ions available in literature.
Evolution, Quantization, Relativity: An “Ab Initio” Model  [PDF]
Sebastiano Tosto
Journal of Modern Physics (JMP) , 2018, DOI: 10.4236/jmp.2018.914161
Abstract: “\"\"= everything flows”, Eraclitus, (Ephesus, 535-475 B.C.). If really in Nature everything changes and progresses, then at least two questions arise: 1) how can be these changes entropic but nonetheless somehow predictable without risk of oxymoronic behavior; 2) how can Science conform itself to follow this requirement of the Nature. To attempt an answer to these questions, the present paper introduces an ab initio theoretical model aimed to show that physical information is actually nothing else but straightforward quantum and relativistic implication of the concept of evolution.
Delay aversion but preference for large and rare rewards in two choice tasks: implications for the measurement of self-control parameters
Walter Adriani, Giovanni Laviola
BMC Neuroscience , 2006, DOI: 10.1186/1471-2202-7-52
Abstract: Wistar adolescent rats (30- to 46-day-old) were tested using either protocol in drug-free state. In the ID protocol, animals showed a marked shift from LL to SS reward when delay increased, and this despite adverse consequences on the total amount of food obtained. In the PD protocol, animals developed a stable preference for LLL reward, and maintained it even when SS and LLL options were predicted and demonstrated to become indifferent. We demonstrate a clear dissociation between these two protocols. In the ID task, the aversion to delay was anti-economical and reflected impulsivity. In the PD task, preference for large reward was maintained despite its uncertain delivery, suggesting a strong attraction for unitary rewards of great magnitude.Uncertain delivery generated no aversion, when compared to delays producing an equivalent level of large-reward rarefaction. The PD task is suggested not to reflect impulsive behavior, and to generate patterns of choice that rather resemble the features of gambling. In summary, present data do indicate the need to interpret choice behavior in ID and PD protocols differently.Lack of self-control abilities is an important symptom of many psychiatric disorders, notably in the attention deficit/hyperactivity disorder (Sagvolden and Sergeant, 1998; Swanson et al., 1998; Sonuga-Barke, 2003). There is indeed a growing interest in the study of impulsive decision in humans (Krawczyk, 2002; Bechara, 2004). As for animal models, many different aspects of impulsivity have been studied with operant-behavior paradigms. In laboratory settings, impulsive behavior can be defined in terms of "poor" decision making, based on anomalous processing of actual incentive values of the two alternatives (Evenden, 1999; Ho et al., 1999; Monterosso and Ainslie, 1999). In one of the most widely adopted paradigms, the intolerance-to-delay (ID) protocol, slightly food-restricted animals are tested in operant-behavior cages, where they are provided with choice
3D Gestural Interaction: The State of the Field
Joseph J. LaViola Jr.
ISRN Artificial Intelligence , 2013, DOI: 10.1155/2013/514641
Abstract: 3D gestural interaction provides a powerful and natural way to interact with computers using the hands and body for a variety of different applications including video games, training and simulation, and medicine. However, accurately recognizing 3D gestures so that they can be reliably used in these applications poses many different research challenges. In this paper, we examine the state of the field of 3D gestural interfaces by presenting the latest strategies on how to collect the raw 3D gesture data from the user and how to accurately analyze this raw data to correctly recognize 3D gestures users perform. In addition, we examine the latest in 3D gesture recognition performance in terms of accuracy and gesture set size and discuss how different applications are making use of 3D gestural interaction. Finally, we present ideas for future research in this thriving and active research area. 1. Introduction Ever since Sutherland’s vision of the ultimate display [1], the notion of interacting with computers naturally and intuitively has been a driving force in the field of human computer interaction and interactive computer graphics. Indeed, the notion of the post-WIMP interface (Windows, Icons, Menus, Point and Click) has given researchers the opportunity to explore alternative forms of interaction over the traditional keyboard and mouse [2]. Speech input, brain computer interfaces, and touch and pen-computing are all examples of input modalities that attempt to bring a synergy between user and machine and that provide a more direct and natural method of communication [3, 4]. Once such method of interaction that has received considerable attention in recent years is 3D spatial interaction [5], where users’ motions are tracked in some way so as to determine their 3D pose (e.g., position and orientation) in space over time. This tracking can be done with sensors users wear or hold in their hands or unobtrusively with a camera. With this information, users can be immersed in 3D virtual environments and avateer virtual characters in video games and simulations and provide commands to various computer applications. Tracked users can also use these handheld devices or their hands, fingers, and whole bodies to generate specific patterns over time that the computer can recognize to let users issue commands and perform activities. These specific recognized patterns we refer to as 3D gestures. 1.1. 3D Gestures What exactly is a gesture? Put simply, gestures are movements with an intended emphasis and they are often characterized as rather short bursts of activity
Isotropic shear bond strength behavior of superficial bovine dentin: A pilot study  [PDF]
Camila Sabatini, Sebastiano Andreana
Open Journal of Stomatology (OJST) , 2013, DOI: 10.4236/ojst.2013.31001
Abstract:

The aim of this pilot study was to evaluate the shear bond strength of superficial bovine incisor dentin in different crown regions. Bonding was performed to the incisal, middle and cervical thirds of superficial bovine coronal dentin (n = 20) with a two-step etch-and-rinse adhesive (Optibond Solo Plus) and resin composite (Z100). Shear bond strength was evaluated at 24 h and failure modes of representative specimens wereobserved with FE-SEM. Non-parametric Kruskal-Wallis test with a significance level of 0.05 was used for data analysis. Mean shear bond strength values for the incisal, middle, and cervical thirds were 36.9 (3.1), 42.6 (2.6), and 37.1 (2.1) respectively with no significant differences evidenced between the crown thirds (p = 0.19). Observation of the failure mode of representative specimens demonstrated that specimens with high bond strength values exhibited predominantly mixed-type failures whereas low strength specimens exhibited adhesive failures between the dentin and adhesive. The absence of significant differences in shear bond strength between crown thirds indicate that, regardless of tubule orientation, any crown region can be used when superficial bovine incisor dentin is used for shear bond strength testing.

CXCR4/CXCL12 in Non-Small-Cell Lung Cancer Metastasis to the Brain
Sebastiano Cavallaro
International Journal of Molecular Sciences , 2013, DOI: 10.3390/ijms14011713
Abstract: Lung cancer represents the leading cause of cancer-related mortality throughout the world. Patients die of local progression, disseminated disease, or both. At least one third of the people with lung cancer develop brain metastases at some point during their disease, even often before the diagnosis of lung cancer is made. The high rate of brain metastasis makes lung cancer the most common type of tumor to spread to the brain. It is critical to understand the biologic basis of brain metastases to develop novel diagnostic and therapeutic approaches. This review will focus on the emerging data supporting the involvement of the chemokine CXCL12 and its receptor CXCR4 in the brain metastatic evolution of non-small-cell lung cancer (NSCLC) and the pharmacological tools that may be used to interfere with this signaling axis.
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