Search results for " protect"
showing 10 items of 1247 documents
Quality control for exposure assessment in epidemiological studies
2010
In the framework of an epidemiological study, dosemeters were used for the assessment of radio frequency electromagnetic field exposure. To check the correct dosemeter's performance in terms of consistency of recorded field values over the entire study period, a quality control strategy was developed. In this paper, the concept of quality control and its results is described. From the 20 dosemeters used, 19 were very stable and reproducible, with deviations of a maximum of +/- 1 dB compared with their initial state. One device was found to be faulty and its measurement data had to be excluded from the analysis. As a result of continuous quality control procedures, the confidence in the meas…
Evidence for a teratogenic risk in the offspring of health personnel exposed to ionizing radiation?!
2016
Background The evidence concerning safety of occupational exposure to ionizing radiation on teratogenic effects mainly relies on animal models, disaster epidemiology and experience in cancer etiology. Following an explorative result on maternal exposure in medical occupations we conducted a feasibility study, addressing congenital anomalies (CA) in the offspring of health workers potentially exposed to radiation. Methods In a prospective follow-up study, we enrolled women, identified by mandatory registration at the office of radiation protection as wearing a dosimeter. The participating women answered a questionnaire and if pregnant agreed to an examination of their infant. CA were diagnos…
Control empresarial del uso de dispositivos digitales en el ámbito laboral desde la perspectiva del derecho a la protección de datos y a la intimidad
2020
Los avances tecnológicos no sólo han permitido una evolución en los procesos productivos o en la forma organizativa y de trabajar de las empresas, sino que también han posibilitado que éstas escojan nuevas formas y métodos de supervisión de la actividad laboral más invasivos, que, en ocasiones, entran en colisión con los derechos fundamentales de los trabajadores, entre ellos, el derecho a la protección de datos y el derecho a la intimidad. La vigente Ley de Protección de Datos destina algunos preceptos a regular el control y acceso por parte de la empresa a los dispositivos digitales facilitados al trabajador. El presente trabajo analiza estos preceptos y los rasgos más destacados de su ré…
Transition and Constitution in School/Work Relations
2012
In every industrial society, there must exist some kind of a transitional mechanism between the demand for and supply of a labour force, that is, a mechanism that facilitates the transition from school to work and from job to job both inside and outside the labour force. There are at least two main ways of organising such a school-labour network. The first way follows the pattern of a marketplace, that is, the labour market process is an extension of the existing market of commodities. In this pattern, the fundamental question in the marketplace relates to buying and selling and to pricing. The second way in which a school-labour network can be organised is based on the idea of a social gua…
Water need of Energy Crops – one of the environmental problems of Poland
2010
The government policy updates of Poland are presented, showing legal and financial instruments for governing bioenergy developments. The strategy for renewable energy must be co-ordinated with the strategy of water management in the country. The water needs are given for cool climate and extensive agriculture of Central and Eastern Europe which are few times lower than for hotter condition of Southern Europe. Despite this the rain would be not enough for water supply of most of the energy crops.
Desalination in small islands: the case study of Lampedusa (Italy)
2018
Desalination represents a common solution to overcome the water scarcity in small island. A case study is presented, considering the island of Lampedusa, located at south of Sicily (Italy). As many small islands in the middle of the Mediterranean Sea, Lampedusa presents a small standalone electrical grid, entrusted to old diesel engines. For more, the renewable energy sources are extremely underdeveloped in this territory. Lampedusa is regularly affected by water scarcity, so freshwater is produced by desalination plant and sometimes transported by boat from Sicily. As sustainable solution, the paper firstly analyses the energy demand for desalination and then proposes the installation of a…
A set of indicators for arc faults detection based on low frequency harmonic analysis
2016
In this paper a novel set of indicators is presented for arc faults detection in electrical circuits. The indicators are defined starting from an experimental characterization of the arc fault phenomenon and the study of the arcing current in several test conditions, which were chosen in accordance with the UL 1699 Standard requirements. The proposed parameters are measured by means of a high resolution low frequency spectral analysis of the arcing current, which allows to achieve a good spectral resolution even with short observation windows.
Assessing the feasibility of cogeneration retrofit and district heating/cooling networks in small Italian islands
2017
Sustainability of energy supply strategies in small islands has been emerging as a severe issue, due to the large margins for improvement and rationalization of the most frequently adopted solutions. In most of the European islands, large amounts of heat are wasted by the operation of engine-based power plants; conversely, heat is produced by boilers (supplied by liquid fuels) or by electric equipment for a number of different uses, like domestic hot water production or space heating in winter. In this paper a techno-economic analysis is proposed to assess the feasibility of CHP-retrofit of the existing power plants and the possible utilization of the recovered heat to supply, via a distric…
Sequential design of multioverlapping controllers for structural vibration control of tall buildings under seismic excitation
2012
In this article, a computationally effective strategy to obtain multioverlapping controllers via the inclusion principle is applied to design a state-feedback multioverlapping linear-quadratic regulator controller for a 20-story building. The proposed semidecentralized controller only requires state information of neighboring stories to compute the corresponding control actions. This particular information exchange configuration allows introducing a dramatic reduction in the transmission range required for a wireless implementation of the communications system. More specifically, just a one-story transmission range is required by the proposed multioverlapping controller, while a full-buildi…
Applications of the Fault Decoupling Device to Improve the Operation of LV Distribution Networks
2008
The aim of this paper is to present the operating principle of a new resonant device, called the fault decoupling device (FDD), able to improve power quality in electrical distribution systems. In low-voltage networks, this device can be employed in order to mitigate voltage dips due to faults or large induction motor startup. Moreover, in the presence of distributed-generation (DG) units, the FDD allows one to obtain various benefits such as a reduction of the fault current in each node of the network and an increase in the voltage at the DG unit node. In order to show the performances of the FDD, analytical studies and computer simulations were carried out which took into account various …