1,721,000 research outputs found
L’attualità del pensiero giuridico di Alessandro Graziani. Graziani commercialista
No full textRiflessione sull’attualità del pensiero giuridico di Alessandro Graziani. Graziani commercialista.
Sommario: 1. Premessa. – 2. Contratto e organizzazione. – 3. Organizzazione e personalità giuridica. – 4. Struttura e funzioni della partecipazione azionaria. – 5. Due esempi. – 6. Conclusione. --- (*) Nel ricordo di Raffaele Rascio e Antonio Vendit
Graziani e la facoltà giuridica napoletana
No full textRicostruzione della carriera scientifica e della vita di Alessandro Graziali, delle vicende connesse alla persecuzione razziale a cui fu sottoposto e della fase di rinascita della facoltà giuridica napoletana dopo le tragedie della guerra
Ray-tracing model and Monte Carlo simulation for the design of the concentrating solar simulator reflector
Full text linkSolar simulators are common laboratory devices to artificially reproduce the Sun emission spectrum. Their use in optic tests allows to study the effect of the solar radiation on both materials and components. This paper focuses on the effective design of the ellipsoidal reflector for concentrating solar simulators. A ray-tracing analytic model integrated to Monte Carlo simulation is proposed as an effective approach to optimize the reflector geometric configuration and to maximize the target incident radiation level and flux distribution. The developed model reproduces the ray trajectories from the source to the target and it includes the physical and optic phenomena affecting the light rays, e.g. absorption, deviation, reflection, distortion, etc. A realistic case study for the effective design of the ellipsoidal reflector for a single source small scale simulator, integrating a commercial xenon short arc lamp, is proposed to both validate and apply the proposed approach. Several scenarios are tested and the main obtained evidences are summarized
Techno-economic and environmental multi-objective design of photovoltaic systems with battery energy storage
No full textThe technological development and the increasing market competitiveness of the renewables creates favourable conditions to partially switch the electricity generation from large centralised facilities to small decentralised plants. Photovoltaic (PV) systems find effective applications if the energy production is dedicated to local self-consumption, while the grid parity concept is extended to a comparison of PV energy generation costs toward the grid electricity tariff. However, the intermittent nature of the solar source suggests the adoption of storage systems to meet the energy demand during the solar absence.
The design of PV plants integrating Battery Energy Storage (BES) includes multiple aspects. Therefore, a techno-economic and environmental multi-objective design approach is proposed in this chapter to determine the PV-BES system configuration able to optimise both the economic and environmental criteria. The model, based on the hourly energy demand, the irradiation and the temperature profiles, is described and the analysis outcomes are widely discussed
Characterization and DEM Modeling of Shear Zones at a Large Dam Foundation
No full textCataclastic rocks and fault gouge present highly variable properties, from those of soil-like materials to those of competent rock mass. In most cases, the entire rock mass, or internal major shear zones, can be represented as a block-in-matrix rock (bimrock), i.e., rock fragments of different shape and size, embedded in a finer matrix. In this paper, a tectonized metamorphic rock mass at the site of a planned gravity dam is investigated. The dam foundation is crossed by numerous major discontinuities, often grouped to form wider shear zones and characterized by high persistency, waviness, and abundant cataclastic filling. Systematic measurements of local orientation and filling thickness along the discontinuity traces made a detailed morphological analysis possible. The most frequent type of filling is a lightly cemented matrix-supported gouge. Undisturbed sampling of filling materials was successful only in some special cases. Laboratory tests, as well as in-situ mechanical tests, were therefore difficult and not exhaustive. Micromechanical distinct-element method (DEM) modeling was instrumental in obtaining a more comprehensive framework of deformation and failure mechanisms of cataclastic materials. The mechanical properties of the particulate model were first analyzed by numerical simulation of biaxial and direct shear tests. The relationship between the overall constitutive parameters and micromechanical properties, such as interparticle friction, contact stiffness, cement bond strength, volumetric block proportion, and block shape, was determined. The complex interplay between the geometric features of a major discontinuity (joint-wall roughness and waviness) and the properties of the infilling bimrock was then investigated, and finally, the overall strength of the infilled discontinuity was analyzed. (C) 2012 American Society of Civil Engineer
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
- …
