Search results for "CONST"

Ponti in Sicilia fra Sette o Ottocento. Il modello dell'acquedotto romano

2015

Nella seconda metà del XIX secolo in Sicilia furono costruiti diversi ponti. Essi riprendevano ancora il modello degli antichi acquedotti romani, modello rilanciato nell'isola, negli anni Settanta del XVIII secolo, da Ignazio Paternò Castello, V principe di Biscari, che costruì un grandioso ponte acquedotto nel feudo di Aragona, presso Catania. Fin dal tado Settecento e nel corso del XIX infatti questo modello fu riattualizzato e si diffuse in tutta Europa attraverso numerosi trattati specialistici, portando alla realizzazione di strutture similari, con diversi ordini di arcate a tutto sesto. In the second half of 19th century some bridges were built in Sicily. They still raised the model o…

Invasive alien species – potential cheap resources of plant substances for medicinal use

2018

Some alien species demonstrate rather invasive behaviour. They have high tolerance of various habitat conditions and potent propagation ability. They not only over-compete the local vegetation but suppress the seed development of the native plants. In the newly invaded habitats they might not have suitable herbivores to control their populations. The only effective enemy might be Homo sapiens. Humans are known with their destructive power once an object has become significant for industrial utilization. The aim of this study is to review research data and reveal the potential of Ambrosia artemisiifolia L., Erigeron canadensis L., Xanthium strumarium L. and Dittrichia graveolens (L.) W. Greu…

Sobre la obsolescencia del positivismo jurídico (Una aproximación desde la historia del pensamiento)

2011

Una de las cuestiones más debatidas en la filosofía del Derecho de los últimos años es la de la obsolescencia del positivismo jurídico: ¿sigue siendo el iuspositivismo una corriente de pensamiento vigente? ¿Hemos trascendido sus fundamentos, entrando así en una nueva era? ¿O bien estamos asistiendo a un momento de quiebra de sus bases, es decir, a caballo entre dos etapas? El objetivo de esta comunicación es encarar esta pregunta desde una aproximación no muy transitada para afrontar este problema en la discusión contemporánea: la historia del pensamiento. Concretamente, veremos cómo la caracterización canónica del positivismo no sirve para dar cuenta de un largo elenco de teorías positivis…

Federaliści i rozłam między klasycznością a modernością

2014

The article shows how the classical political thinking, based on civic virtues, and modernist thinking, based on individualism and self-interest, formed the basis of the U.S. Constitution. The Founding Fathers did not realize the full extent of the rift between classicism and modernity. When, as a result of intellectual discussions and practice of social life, this divide began to become more and more obvious, there has been a transition from the classical to the modernist paradigm in American politics. However, the dispute between classicism and modernity still continues and takes on new forms. On the one hand, contemporary political thinking is seen as a triumph of modernism, in which the…

Model of line to shield power line communication system on a Medium Voltage network

2010

In this paper a complete model of a power line communication (PLC) system on a Medium Voltage (MV) network is presented in the case of a line-ground configuration. A simple and friendly Simulink (R) software is used to develop the model. A distributed parameter MV cable model in line-ground configuration is considered together with the power transformers, the signal coupling networks and the receiving and transmitting line coupling interface of a ST7540 FSK powerline transceiver. The performances of the complete PLC communication system are evaluated for different line lengths by means of the attenuation computed as ratio between the received and transmitted voltage signals.

Power Line Communication in Medium Voltage Systems: Characterization of MV Cables

2008

The aim of this paper is to illustrate the development of a theoretical and experimental study on the characterization of medium voltage (MV) cables in the frequency range 25-200 kHz. Two transmission line configurations, line-ground and line-line, were considered in order to evaluate the main parameters, such as the characteristic impedance and the attenuation constant alpha. A simplified model of the line-ground configuration is proposed which allows one to evaluate the characteristic impedance and the attenuation constant by means of geometrical dimensions. The model was verified by experimental measurements on commonly used MV cables, RG7H1R, with an aluminium core of different sections…

Główne założenia projektu zmian konstytucyjnych w programie politycznym Prawa i Sprawiedliwości

2018

Petro-archaeology of Gallo-Roman lime mortar. Attempt to reconstruction and interpretation of the “chaînes opératoires”: from material to ancient cra…

2003

Petro-archaeological research on Gallo-Roman lime mortars is based on a simple analytical methodology: observations with optical microscopy in transmission, which brings us a maximum of data about the material and the various stages of the “chaîne opératoire”. This work enabled us to draw the general features of the craftmanship (common practices of the ancient structores and tectores), to establish the relations between mortar composition and its “primary” and “secondary” architectural function, then to perceive what are the markers and motivations of the formula adaptations. The importance of the geological environment is shown, because it induces economic and technical choices, requiring…

Design principles of educational virtual worlds for preschool children : a case study of JumpStart World Kindergarten's pedagogical methods

2010

This thesis studies the design principles of educational virtual worlds for pre-school children. It examines the culture and contextualization of the virtual worlds for children used for the purpose of informal education through learning games in the case study of JumpStart World Kindergarten. The theoretical background provides an overview of the historical development of educational virtual worlds based on the progression of MUDs, MOOs and MMORPG. In addition, the issues in implementation and adaptation of information and communication technologies (ICT) as part of educational methodologies are examined, thus a perspective is given of possible problems and solutions for optimization of us…

THE ADMINISTRATIVE JUSTICE IN SPAIN: CURRENT SITUATION AND CHALLENGES

2016

Since the Spanish Constitution of 1978 there has been a full and effective administrative justice. The citizens have the possibility to request a judicial review of decisions taken by the public Administrations, while being either the owners of a subjective right or of a legitimate interest. The interim judicial protection is not limited to the suppression of the act or general provision and the Courts are invested with direct powers to enforce their sentences. However, different problematic issues about the inactivity of the public Administrations and the enforcement of sentences are the new challenges to ensure the administrative justice. To this it must be added that there are problems r…