Search results for "Bull"
showing 10 items of 345 documents
Pastori, patroni, dèi. Personaggi politici e loro inclusione nel mondo bucolico (Tibullo, Virgilio, Calpurnio Siculo)
2009
L'articolo esamina le strategie letterarie attraverso le quali opere come le Ecloghe di Virgilio e di Calpurnio Siculo ed i pannelli georgico-bucolici dell’elegia tibulliana ‘includono’ nel mondo pastorale personaggi legati alla realtà del patronato letterario A study on the literary strategies through which Virgil's Bucolics, Tibullus' Elegies and Calpurnius Siculus' Eclogues 'include' literary patrons in the pastoral world.
Simplified Hybrid PD Model in Voids
2011
In this paper a novel approach to model partial discharges (PD) activity taking place inside a spherical void in epoxy resin system has been traced. The approach is based on a time varying conductance of the inner void, subjected to multistress conditions: voltage, temperature and pressure. A simple lumped circuit macro-model simulates the global effects of PD activity: the different parameters influencing the discharge phenomenon in the void are taking into account by using a physical approach resulting in a time varying conductance inside the circuit. The evaluated PD activity has been compared with experimental and simulated one for the accessible and inaccessible part of the system. A d…
Simplified hybrid PD model in voids: Pattern validation
2013
The purpose of the present work is to show the validation of a new model to simulate the physical phenomenon of partial discharge (PD) produced in air voids inside insulating epoxy resin. The model has been developed on the basis of a new approach that combines the known circuit model of three capacitors with a model used to describe the behavior of the ionized channel inside of the inclusion during the discharge phenomenon, short-circuiting the capacity that represents the void. The approach is based on time-variable conductance of the void, subjected to multistress conditions: voltage, temperature and pressure. The new approach has been developed from a time variable conductivity model us…
Amerikkalaiset ja Saksan pakolaiskysymys Weekly Information Bulletin -tiedotuslehdessä vuosina 1945-1953
2011
Toinen maailmansota johti vaikeaan pakolaisongelmaan, jonka keskuksena oli antautunut Saksa. Alueella oleskelleet pakolaiset tulivat hyvin erilaisista lähtökohdista ja pakolaisten määrä kohosi useisiin miljooniin. Ongelmien ratkaisu oli Saksaa miehittäneiden liittoutuneiden vastuulla. Tämän tutkielman aiheena on amerikkalaisten vuosina 1945–1953 Saksassa julkaiseman tiedotuslehden Weekly Information Bulletinin (WIB) kirjoittelu Saksan toisen maailmansodan jälkeisestä pakolaisuudesta. Tarkastelen tutkielmassani historiallis-kvalitatiivisen lähestymistavan avulla pakolaiskirjoittelun kokonaiskuvan lisäksi sen laatua ja sävyä, sekä arvioin miksi lehti kirjoitti juuri tällä tavoin. WIB:in tärke…
Wind speed spatial estimation for energy planning in Sicily: introduction and statistical analysis
2008
Abstract The exploitation of the renewable energy sources plays a key role for achieving the CO 2 emissions reduction targets established by the Kyoto Protocol, as well as for facing the shortage of world fossil fuels reserves. In countries like Italy, with an high potential in terms of wind power generation, an efficient energy planning based on renewables is a very complex task. It encompasses many aspects: the resource availability assessment, the compliance with environmental and legislative constraints and last, but not least, the technical aspects linked to the safe integration to the grid of the intermittent power generated by the wind farms. This paper is the first part of a study a…
Joint probability distributions for wind speed and direction. A case study in Sicily
2015
In this study we analyze data of hourly average wind speed and direction measured at three different sampling stations located in Sicily (Italy) and provide a statistical model for their joint probability density function. Singly truncated from below Normal Weibull mixture distribution and a linear combination of von Mises distributions are used to model wind speed and direction. Sites with heterogeneous local conditions (prevailing wind direction and/or elevation) have been considered in order to investigate the reliability of the model here taken into consideration.
Partial discharge tests using CIGRE method II
2000
In this paper, the results of an experimental project on insulating material aging, performed in both Denmark and Italy, are reported. This study was concerned with partial discharge (PD) behavior at temperatures between 30 and 80/spl deg/C using CIGRE method II. The material tested was a commercial polymethylmethacrylate (PMMA) which was chosen not for its good dielectric properties but rather because much of its discharge resistance data at ambient temperature is already well documented. A description is given of the theoretical and experimental methodology followed in this work. Mixed Weibull analysis techniques in terms of the PD amplitude and phase distribution characteristics were emp…
Psychological Contract Violation or Basic Need Frustration? Psychological Mechanisms Behind the Effects of Workplace Bullying
2021
Workplace bullying is a phenomenon that can have serious detrimental effects on health, work-related attitudes, and the behavior of the target. Particularly, workplace bullying exposure has been linked to lower level of general well-being, job satisfaction, vigor, and performance and higher level of burnout, workplace deviance, and turnover intentions. However, the psychological mechanisms behind these relations are still not well-understood. Drawing on psychological contract and self-determination theory (SDT), we hypothesized that perceptions of contract violation and the frustration of basic needs mediate the relationship between workplace bullying exposure and well-being, attitudinal, a…
Evaluation of the Effects of a Bullying at Work Intervention for Middle Managers.
2020
The aim of the study is to evaluate the effects of a workplace bullying intervention based on the training of middle managers regarding bullying awareness, the consequences of bullying, strategies in conflict resolution and mediation/negotiation abilities. Overall, 142 randomly selected middle managers participated in the study. First, participants completed an information record and two scales assessing bullying strategies, role conflict and role ambiguity. The last two scales were completed again in a second phase three months after the intervention had finished. The intervention produced a decrease in the following bullying strategies: effects on self-expression and communication, effect…
Psychosocial safety climate (PSC) and enacted PSC for workplace bullying and psychological health problem reduction
2017
Bullying at work has profound effects on both the individual and organization. We aimed to determine if organizational psychosocial safety climate (PSC; a climate specific to worker psychological health) could reduce workplace bullying and associated psychological health problems (i.e., distress, emotional exhaustion, depression) if specific procedures were implemented (PSC enactment). We theorized that the PSC enactment mechanism works via psychosocial processes such as bullying mistreatment climate (anti-bullying procedures), work design (procedures reduce stress through work redesign), and conflict resolution (procedures to resolve conflict). We used two-wave national longitudinal interv…