Search results for "board"
showing 10 items of 308 documents
Power Bus Management Techniques for Space Missions in Low Earth Orbit
2021
In space vehicles, the typical configurations for the Solar Array Power Regulators in charge of managing power transfer from the solar array to the power bus are quite different from the corresponding devices in use for terrestrial applications. A thorough analysis is reported for the most popular approaches, namely Sequential Switching Shunt Regulation and parallel-input Pulse Width Modulated converters with Maximum Power Point Tracking. Their performance is compared with reference to a typical mission in low Earth orbit, highlighting the respective strengths and weaknesses. A novel solar array managing technique, the Sequential Maximum Power Tracking, is also introduced in the trade-off a…
Movie Script Similarity Using Multilayer Network Portrait Divergence
2020
International audience; This paper addresses the question of movie similarity through multilayer graph similarity measures. Recent work has shown how to construct multilayer networks using movie scripts, and how they capture different aspects of the stories. Based on this modeling, we propose to rely on the multilayer structure and compute different similarities, so we may compare movies, not from their visual content, summary, or actors, but actually from their own storyboard. We propose to do so using “portrait divergence”, which has been recently introduced to compute graph distances from summarizing graph characteristics. We illustrate our approach on the series of six Star Wars movies.
Solid state 13C-NMR methodology for the cellulose composition studies of the shells of Prunus dulcis and their derived cellulosic materials.
2020
Lignocellulosic fibers and microcellulose have been obtained by simple alkaline treatment from softwood al- mond shells. In particular, the Prunus dulcis Miller (D.A.) Webb. was considered as a agro industrial waste largely available in southern Italy. The materials before and after purification have been characterized by 13C CPMAS NMR spectroscopy methodology. A proper data analysis provided the relative composition of lignin and holo- cellulose at each purification step and the results were compared with thermogravimetric analysis and FT-IR. To value the possibility of using this material in a circular economy framework, the fibrous cellulosic material was used to manufacture a handmade c…
Preliminary thermal optimization and investigation of the overall structural behaviour of the EU-DEMO water-cooled lead lithium left outboard blanket…
2022
The conceptual design phase of the EU-DEMO reactor has been recently launched, with the aim of evolving the DEMO pre-conceptual layout towards a more robust and articulated geometric configuration able to cope with most of the design requirements and to show further margins for the passing of the current potential show-stoppers. Hence, the achievement of the conceptual design of the Water-Cooled Lead Lithium Breeding Blanket (WCLL BB) is one of the milestones the EUROfusion consortium aims to achieve in the close future. To this purpose, within the framework of the research activities promoted by EUROfusion, a research campaign has been launched at the University of Palermo, in close cooper…
Current-Based Measurement Technique for High Sensitivity Detection of Resistive Bridges With External Balancing Through Control Voltages
2017
We present a novel approach based on differential measurements of dc currents with very high sensitivity suitable for the detection of very small variations of resistors in Wheatstone full-bridge configurations. External control voltages allow for the compensation of the bridge unbalancing avoiding the need of changing its elements so making the solution suitable for integrated sensor systems. The proposed current-based measurement technique has been implemented through three different circuits, in transimpedance configuration and without the use of any further amplification stage, employing only two active blocks that allow for a very high integration level. The main characteristics of the…
L?escrutini de la Batllia General de València durant la visita general de Pedro de la Gasca (1543-1545)
2019
Master?s Final Project is aimed at illustrating the situation that the general Bailiwick of València experienced within the firs half of the sixteenth century, starting from the reconstruction of the general visit process carried out by Pedro de la Gasca, as well as the consequences it implied for the institution.
Boards in microfinance institutions: how do stakeholders matter?
2012
Published version of an article in the journal: Journal of Management and Governance. Also available from the publisher at: http://dx.doi.org/10.1007/s10997-011-9191-4 Microfinance Institutions provide financial services to poor people. Governance of these organizations is important so that they can operate efficiently and sustainably. This study analyzes the influence of stakeholders (donors, employees, customers, and creditors), on board structure (board size and CEO duality), and on organizational performance. We use a global data set of 379 microfinance institutions from 73 countries, collected from rating organizations. Supported by stakeholder theory, agency theory and resource depend…
Thermal conductivity measurement of insulating innovative building materials by hot plate and heat flow meter devices: A Round Robin Test
2019
Abstract The characterization of thermal insulation properties of construction materials represents a fundamental step on the building insulation assessment. In recent years innovative materials have been introduced in the market to fulfill the continuously growing requirements of energy saving and sustainability, and their performance is not so reliable and mature as it happens for traditional insulators. The work presents a Round Robin Test realised among six European laboratories hosting hot plates devices to measure the thermal conductivity of four different materials: aerogel, vacuum insulation panels, polystyrene and birch wood fibre insulation boards. After the definition of the comm…
Impact of corporate governance on firm performance and total shareholder return of german listed companies
2017
Promocijas darba mērķis ir izpētīt attiecības starp būtiskākajām Vācijas Korporatīvās vadības sistēmas daļām un uzņēmumu sniegumu Vācijas kotētajos uzņēmumos, lai noteiktu elementus ar pozitīvu un negatīvu ietekmi uz uzņēmumu sniegumu un kopējo akcionāru peļņu, pamatojoties uz fundamentālo literatūru, iepriekšējo pētījumu analītisko izpēti un uz divu pētījumu - empīriskā kvantitatīvā pētījuma un kvalitatīvās ekspertu interviju aptaujas - pierādījumiem. Darbu noslēdz ieteikumi Valdības komisijai pārskatīt kodeksu attiecībā uz tā negatīvo ietekmi uz uzņēmuma darbību un izvairīšanos no riska, akcionāriem un uzraudzības padomju priekšsēdētājiem uzlabot sastāva struktūru un ieviest padomes darbā…
Development of trust in the CEO-chair relationship
2017
Purpose The purpose of this paper is to explore the trust development in the dyadic relationship of CEO and chair of the board. Design/methodology/approach A narrative approach is adopted to examine the meanings that CEOs and chairpersons give to trust in their relationship, and to explore trust as an evolving phenomenon that can increase or decline over the course of the relationship. The data include 16 CEO-chair dyads from Finnish limited companies. Findings The results suggest that trust may exist on different levels and evolve in various ways during the course of the relationship. Integrity and agreement on company strategy are proposed to form the foundation for trust in the CEO-chai…