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Search Results: 1 - 10 of 5038 matches for " Gabriela Atanasiu "
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Seismic Risk Identification Based on the Expected Annualized Losses
Genoveva Perju,Gabriela-Maria Atanasiu
Bulletin of the Polytechnic Institute of Jassy, Constructions, Architechture Section , 2006,
Abstract: A new method for the seismic risk identification is proposed based on the average measure of the expected annualized losses from earthquake occurrence. We show up how can be identified the risk for insurance decisional purposes. The analysis is useful for insured as well as for insurance company. When risk is considered from time dynamical perspective we emphasize the advantage of diversification for earthquake risk mitigation.
Probabilistic Modelling of the Seismic Hazard using the Romanian Earthquake Catalogue
Bogdan F. Popa,Gabriela-Maria Atanasiu
Bulletin of the Polytechnic Institute of Jassy, Constructions, Architechture Section , 2005,
Abstract: The actual trend of performance based modelling of the seismic action is to adopt probabilistic models of the seismic hazard. In the first part of the paper are presented theoretical aspects of the seismic hazard definition from the probabilistic point of view as a function P(Y > y) that describes the probability that in a given region (M) and for a time interval (T), the value of a parameter, Y (for example: macroseismic intensity, acceleration, velocity and displacement of the soil) to overpass the given value (y) as an effect of a seismic event” [4]. The probabilistic study of the seismic hazard gives the possibility to implement new parameters, such as: the likeliness and the occurrence frequency of the seismic events. Nowadays most of the international standards adopted the probabilistic analysis of the seismic hazard as a complementarity of the deterministic analysis. In the second part of the paper are presented the results of the probabilistic analysis for Vrancea region using the Gumbel 1 probabilitic model that has the parameters determined throughout the extreme values statistical method.
A Digital Methodology for Urban Risk Management
Gabriela-Maria Atanasiu,Florin Leon
Bulletin of the Polytechnic Institute of Jassy, Constructions, Architechture Section , 2007,
Abstract: While the overall goal is to prevent disasters as much as possible, the goal of mitigation is to reduce the risks. That is why the risk must be quantifiable in the decision support system. Geographic Informations System (GIS) support may be used for all the disaster prevention phases, but what we are concerned with here is the use of GIS for physical planning in the mitigation phase. In this paper we present a methodology and several case studies of using GIS as a tool for awareness and mitigation of seismic effects of possible future events in the urban area.
Disaster Risk Management of Urban Systems
Ana-Diana Anca?,Florin Leon,Gabriela-Maria Atanasiu
Bulletin of the Polytechnic Institute of Jassy, Constructions, Architechture Section , 2006,
Abstract: Evaluating the risk of natural disasters is an intensely debated issue, both on national and international level. In the present paper, after a brief review of the international research in this field and an introduction in risk management, we insisted on risk analysis of an urban area, called urban system. More precisely, we investigated the evaluation of risk and the behavior of the pipelines infrastructure characteristic in an urban area during an earthquake.By taking into account a certain region in Jassy city area, we present a methodology of evaluating seismic risk of the utilities network of the region. The method consists in establishing the necessary steps to be taken in such an evaluation. These steps are also graphically displayed for the gas pipelines of the area, and emphasizing the critical points existent in that sector e.g. gas stations). Using the cellular automata technique, inspired from the artificial intelligence and complex system fields, based on the GIS map of the analysed region, we obtained a map with the risk areas in case of an earthquake, taking into account the gas pipelines network and the existing critical points.
Creating Scenarios for Seismic Risk Reduction Using Geographic Information Systems
Florin Leon,Bogdan-Florin Popa,Gabriela-Maria Atanasiu
Bulletin of the Polytechnic Institute of Jassy, Constructions, Architechture Section , 2007,
Abstract: This paper presents a GIS-based methodology for monitoring the seismic performance, while taking into account the deteriorations revealed during GIS-based scenarios aiming at the identification of the seismic serviceability of the structure. By applying the geographical information system (GIS) containing geo-spatial data, one can develop useful scenarios to improve the knowledge of structural vulnerability of the urban built infrastructure. Scenarios of modelling, simulation and non-linear seismic analysis are described and applied to a class of damaged models for some of the structures typical of the existing urban infrastructure of Jassy, Romania. The management of GIS-based seismic vulnerability of existing concrete structure is presented as a tool for awareness and mitigation of seismic effects of possible future events in the urban area.
Current State of the Art for Existing Critical Systems in Urban Seismic Area
Ana-Diana Anca?,Cornel Doniga,Gabriela Atanasiu
Bulletin of the Polytechnic Institute of Jassy, Constructions, Architechture Section , 2006,
Abstract: The paper is structured in three main parts. In the first part, there is a classification of the critical systems existing in the urban background, which are part of an extremely urging informational infrastructure in case of a seismic event. The critical systems are identified as those systems whose malfunction may lead to disasters affecting the human being and the environment as well. The second part focuses on the underground pipe networks, presenting at the same time, their classification into three categories of great importance in case of an earthquake, and last but not least, the final part contains the presentation of an analysis methodology of seismic behavior of the underground pipe networks, considered as part of the existing critical systems, in case of a seismic event in an urban area.
Linearized Credibility Formula for Exponentially Weighted Squared Error Loss Function
Virginia ATANASIU
Informatica Economica Journal , 2008,
Abstract: Is an original paper, which describes techniques for estimating premiums for risks, containing a fraction (a part) of the variance of the risk as a loading on the net risk premium.
More General Credibility Models
Virginia ATANASIU
Informatica Economica Journal , 2007,
Abstract: This communication gives some extensions of the original Bühlmann model. The paper is devoted to semi-linear credibility, where one examines functions of the random variables representing claim amounts, rather than the claim amounts themselves.
Explicit Description of the Input Data for the Program CRAC 2.0 Used in the Applications of the Credibility Theory
Virginia ATANASIU
Informatica Economica Journal , 2008,
Abstract: In this paper a brief overview of the structure and the possibilities of the program CRAC 2.0 is given. It will be shown how sectors can be determined in order to use the hierarchical model that is built into the software. Furthermore a general structure for defining insurance problems to be solved by CRAC 2.0 will be discussed. Mathematics Subject Classification: 62P05.
Semi-linear credibility results
Virginia ATANASIU
Informatica Economica Journal , 2007,
Abstract: An original paper which suggests a way of thinking for semilinear credibility theory develpment, founded on analysis of the functions of the observable random variables. This line of thought fits perfectly within the framework of the greatest accuracy credibility theory.
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