Results 1 - 10 of 81
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[en] In this paper are presented the objectives and scope of the Periodic Safety Review performed, it is exposed its development and indicated the conclusions highlighting areas of most interest.. (Author)
[en] Gas-electricity convergence is a relatively recent industrial trend. It can significantly increase energy sector efficiency. However, it also raises the possibility on anti-competitive behaviours. One of these problems is the so-called input foreclosure. It happens when a natural gas dominant firm restricts its access to its electricity sector competitors. This paper intends to briefly introduce the issue, with special focus in aspects relevant for the Spanish case. (Author)
[en] It is assumed that pulsar emission is composed of two distinct beams originating in the magnetosphere at widely separated locations. It is shown that if one of the beams arises in a region where the magnetic field lines are distorted from dipolar form due to the pulsar rotation then the polarization vectors of this beam are not, in general, parallel to the polarization vectors of the other beam which originates in an undistorted field region. In many geometrical situations, the polarization vectors of the two distinct beams can be mutually quasi-perpendicular. Therefore, the existence of these two beams of pulsar emission is equivalent to the existence of two superposed orthogonal polarization modes. It is argued that different polarization modes correspond to the core and conal pulsar emission. The main polarization mode associated with core emission originates close to the star, while the other mode associated with conal emission originates much farther from the star, in the region where the curvature of the field lines is dominated by the toroidal component of the pulsar magnetic field. 17 references
[en] The frequency dependence of component separation in pulsar intergrated profiles is considered. A development of Komesaroff's hypothesis concerning this problem is presented. Komesaroff (1970) obtained the νsup(-1/3) dependence by using very peculiar assumptions: the magnetic axis passes through the observer, and the component peak at different frequencies is produced along the same dipole field line. It is shown that a generalization of these assumptions permits one to obtain different values of the separation index, according to the angle between the line-of-sight and the magnetic axis. (author)
[en] A model for pulsar radiation at high radio-frequencies is presented. It is argued that the reason for the appearance of the break frequency may be the existence of a hollow-zone near the magnetic axis where the strong coherent radiation is not produced. This model explains the occurence of the break frequency at approximately the same values for component separation, mean spectrum and the modulation index. (author)
[en] It is demonstrated that within an angular beaming model of microstructure, the longitude of micropulses should be independent of frequency, whereas the component separation can vary in the frequency band in which the micropulses are visible. (orig.)
[en] In 1990, the Junta (Regional government) of Extremadura encharged the University of Extremadura with the desogm and phased implementation of the Radiological Warning Network of Extremadura, initially limited to the proximity of the Almaraz Nuclear Power Plant. Since then, its structure and objectives have been steadily broadened, but always with priority given to the correct operation of the existing infrastructure. The network currently consists of the following installations. Around the cited nuclear plant, there are seven gamma dosimetry stations, two stations of continuous monitoring of radio iodines and radio particles, two automated meteorology stations, and two stations of continuous monitoring of radiation levels in the water of the River Tagas. Outside this zone, there are three gamma dosimetry stations and two for the continuous monitoring of radiosonde and radio particles. There is also a mobile laboratory equipped with an aerosol trap, a gamma dose rate monitor, and a portable germanium detector, with which it is possible in a minimally reasonable time to reach any location where it is necessary to determine the radiological status. All the information generated by the cited stations and the mobile laboratory are transmitted to the logistic centre located in the Physics Department of the Veterinary Faculty of Caceres, and to the network's strategic centre in the General Directorate for the Environment of the Agriculture and Environment council of the Junta of Extremadura. From the beginning of its operation, particular attention was paid to finding different means of providing the population with basic, truthful, and accessible periodic information on the radiological status of the zones covered by the network. Therefore, as well as sending to the Assembly (Parliament) of Extremadura summaries of the reports that are periodically presented to the Junta, an initial attempt was made to inform the population directly by including in the journal Extremadura XXI a summary sheet, relatively easy to interpret, giving the radiation levels and dosimetry detected during the immediately proceeding semester. Recently too, the challenge has been taken on of providing constantly, updated information on as complex a topic as the radiological monitoring of the environment. To this end, a Web page has been developed dealing with the operation and results provided by the aforementioned Radiological Warning Betwork of Extremadura. The page structure consists of seven major blocks: (i) origin and objectives of the network; (ii) a description of the stations of the network; (iii) their modes of operation in normal circumstances and in the case of an operational or radiological anomaly; (iv) the results that the network provides; (v) a glossary of terms to clarify as straightforwardly as possible some of the terms and concepts that are of unavoidable use, but are unfamiliar to the population in general; (vi) information about links to other Web sites that also deal with this issue to some degree; and (vii) giving the option of questions and contacts between the visitor to the page and those responsible for its creation and maintenance. Actions such as that described here will doubtless contribute positively to increasing the necessary trust that the population deserves to have in the correct operation of the measures adopted to guarantee their adequate radiological protection. (Author)
[en] Work has been applied DAKOTA-SCAIS-MAAP-R for a loss of coolant in the primary sequence analysis, considering parameters and times uncertain, in a PWR plant - 3L Westinghouse design; which allows to verify the security analysis where temporary uncertainty represents an important parameter.
[en] Understanding the dynamic of soil C is a key to managing soil organic matter to enhance soil fertility and ecosystem functioning and reduce trace gas emission from soils. Our objective was to determine the influence of thermically-dry sewage sludge (TSL) and municipal waste compost and the application management on soil (mixed or on soil surface) applied at sludge (TSL) and municipal waste compost and the application management on soil (mixed or on soil surface) applied at two rates of 30 t ha-1 and 60 t ha-1, on CO2 fluxes, microbial biomass C (MBC) and dehydrogenase activity (DH), during an incubation study. (Author)
[en] In the following research, a comparative analysis between two air conditioning systems will be made. One is going to overview an air-air conditioning system and the other one an hydronic system fed by geothermic energy thanks constant temperatures of hearth. For this research a protected building has been chosen, placed in the centre of Madrid. It is the old military building Daoiz y Velarde, refurbished into a children´s theatre and cultural space. The choice made for this building has been made due to the fact that working in a safe building makes it easier to draw comparative analyzes. The structure and the frontage can´t be modified, therefore the research should start from the conditions found from the beginning. Finally, it has to be adapted to the C.T of the building, taking in consideration some of the specific requirements for cultural and children´s spaces.