7 research outputs found
Stability analysis of planetary systems via second-order Renyi entropy
The long-term dynamical evolution is a crucial point in recent planetary research. Although the amount of observational data are continuously growing and the precision allows us to obtain accurate planetary orbits, the canonical stability analysis still requires N-body simulations and phase space trajectory investigations. We propose a method for stability analysis of planetary motion based on the generalized Renyi entropy obtained from a scalar measurement. The radial velocity data of the central body in the gravitational three-body problem are used as the basis of a phase space reconstruction procedure. Then, Poincare's recurrence theorem contributes to finding a natural partitioning in the reconstructed phase space to obtain the Renyi entropy. It turns out that the entropy-based stability analysis is in good agreement with other chaos detection methods, and it requires only a few tens of thousands of orbital period integration time
Genotoxic effects of ultraviolet (UV) radiation on human 3D skin model in vitro
International audienceThe aim of this experiment was to examine whether the UVA or UVB exposure with two doses each has genotoxic effect on human reconstructed skin in vitro. The DNA damage was detected by comet assay. In this preliminary study we managed to show the direct damaging effect of the UVB radiation on the DNA, but UVA exposure did not have any significant effect. This experiment was done as a preliminary study for the project named “Cellular response to co-exposure of radiofrequency (RF) and solar ultraviolet (UV) radiation in human in vitro skin model (SKIN-RF)”
Detecting the non-ionizing radiation induced genotoxicity by the Comet assay method
International audienceNon-ionizing radiation is the term given to radiation in the part of the electromagnetic spectrum that doesn’t have enough energy to ionize atoms or molecules directly. It includes electric and magnetic fields up to 300 GHz, infrared, visible, and ultraviolet radiation (UV). People are exposed to non-ionizing radiation by several man-made sources every day. This includes microwave ovens, cell phones, baby monitors, cordless phones, garage-door openers, etc. There is a big concern amongst the public and authorities regarding possible adverse health effects from exposure to electromagnetic fields. In 2002 the IARC concluded that extremely low frequency magnetic fields (ELF) are possibly carcinogenic (Group 2B). The same conclusion was reached in 2011 with respect to radiofrequency fields (RF) from mobile phones. UV radiation has been classified by IARC as Group I: carcinogenic to humans. In many cases and studies the link has been established between genotoxicity and the possibility that non-ionizing radiations including EMFs are carcinogenic. In our laboratory we use comet assay for testing genotoxicity of non-ionizing radiation for more than ten years. In experiments we use whole blood samples (human or dog), cell lines (e.g. fibroblast, H295R cell line) or 3 dimensional skin tissue (epidermis) models. In our protocol alkaline Comet assay method is used. On our poster there will be presented brief summary of our experiments with different types of radiation (ELF, RF, intermediate frequency and UV). Part of this work was done in the SKIN-RF project funded by ANSES (France)
Agricultural economics and transition: What was expected, what we observed, the lessons learned Proceedings (Volume I / II)
Over fifteen years have elapsed since the transition from the centrally planned
economic system started in the early 1990’s. During this time agricultural and
rural areas of Central and Eastern Europe have undergone profound structural
changes with wide variations in the degree of transformation and in the rate of
success in creating a competitive market and private ownership based food and
agricultural system. By becoming member of the European Union the "transition"
in its traditional interpretation has been concluded in ten of the Central East
European countries. The transition to market based agriculture, however, is far
from completion in Southern and Eastern Europe and especially in the CIS
countries.
International Association of Agricultural Economists (IAAE) and European
Association of Agricultural Economists (EAAE) in collaboration with the
Corvinus University of Budapest and with a number of other institutions in
Hungary organized an inter-conference seminar on the subject of agricultural
transition in Central and Eastern Europe and Central Asia. The major objective
of the seminar was to discuss and draw conclusions on the role of agricultural
policy in the transition process in the light of actual progress and current situation
in Central and East European countries and in formal Soviet States. In addition
the contribution of agricultural economics – both from the West and from the
East – as a discipline and a profession to the transition process in agriculture were
discussed. A specific objective was to identify priorities and means to strengthen
the agricultural economics profession in the transition countries and determine
research and educational priorities for the future.
The seminar was attended by 118 participants representing 26 countries from
Europe, North America and Asia. The Seminar was the largest professional
meeting organized by the two associations in 2007. Over 110 abstracts were
submitted and evaluated by the International Program Committee. In the two
day program of the meeting, 8 presentations were made during the 3 plenary
sessions, 66 papers were presented in the 15 contributed paper sessions in 8 subject
categories. In addition there were 15 posters discussed in the poster session and
the findings of a World Bank study on distortions of agricultural incentives in
the region was the subject of a pre-conference workshop. Plenary speakers
included Ulrich Koester, Johan Swinnen, Jerzy Wilkin, Zvi Lerman, Eugenia
Serova and József Popp-Gábor Udovecz. At the end of the seminar David Colman, President of IAAE gave a global assessment of the status of agricultural
economics discipline and profession, while Csaba Csáki, former President of
IAAE made summary comments on major issues discussed during the seminar.
This volume includes the plenary and contributed papers presented at the seminar
and submitted for publications by the authors as well as the abstracts of the poster
papers discussed.
The seminar was supported and sponsored by a number of organizations and
persons. All of their contributions have to be greatly acknowledged. First the
two international organizations IAAE and EAAE have to be mentioned, which
provided overall organizational framework and logistical support. The IAAE
provided in addition a generous grant to support the participation of young
agricultural economists from Central and Eastern Europe on the seminar. On the
Hungarian side the Corvinus University of Budapest, the Szent István University
of Gödöllő, the Research Institute for Agricultural Economics, the Hungarian
Agricultural Economics Association, the Hungarian Association of Agricultural
Sciences and the Hungarian Ministry of Agriculture and Rural Development
were the major material and organizational supporters. The International Program
committee was chaired by David Colman and Csaba Csáki and included
Ulrich Koester, Joe Swinnen, Eugenia Serova and Jerzy Wilkin. The local
Organizing committee was chaired by Csaba Forgács and István Szűcs and
included Zoltán Lakner, András Nábrádi, József Popp, József Tóth, Gábor Udovecz,
László Vajda, László Villányi, Krisztina Fodor, Attila Jámbor and Tamás Mizik.
Finally IAMO, Halle facilitated the publication of this proceedings
Agricultural economics and transition: What was expected, what we observed, the lessons learned Proceedings (Volume I / II)
Over fifteen years have elapsed since the transition from the centrally planned economic system started in the early 1990âs. During this time agricultural and rural areas of Central and Eastern Europe have undergone profound structural changes with wide variations in the degree of transformation and in the rate of success in creating a competitive market and private ownership based food and agricultural system. By becoming member of the European Union the "transition" in its traditional interpretation has been concluded in ten of the Central East European countries. The transition to market based agriculture, however, is far from completion in Southern and Eastern Europe and especially in the CIS countries. International Association of Agricultural Economists (IAAE) and European Association of Agricultural Economists (EAAE) in collaboration with the Corvinus University of Budapest and with a number of other institutions in Hungary organized an inter-conference seminar on the subject of agricultural transition in Central and Eastern Europe and Central Asia. The major objective of the seminar was to discuss and draw conclusions on the role of agricultural policy in the transition process in the light of actual progress and current situation in Central and East European countries and in formal Soviet States. In addition the contribution of agricultural economics â both from the West and from the East â as a discipline and a profession to the transition process in agriculture were discussed. A specific objective was to identify priorities and means to strengthen the agricultural economics profession in the transition countries and determine research and educational priorities for the future. The seminar was attended by 118 participants representing 26 countries from Europe, North America and Asia. The Seminar was the largest professional meeting organized by the two associations in 2007. Over 110 abstracts were submitted and evaluated by the International Program Committee. In the two day program of the meeting, 8 presentations were made during the 3 plenary sessions, 66 papers were presented in the 15 contributed paper sessions in 8 subject categories. In addition there were 15 posters discussed in the poster session and the findings of a World Bank study on distortions of agricultural incentives in the region was the subject of a pre-conference workshop. Plenary speakers included Ulrich Koester, Johan Swinnen, Jerzy Wilkin, Zvi Lerman, Eugenia Serova and József Popp-Gábor Udovecz. At the end of the seminar David Colman, President of IAAE gave a global assessment of the status of agricultural economics discipline and profession, while Csaba Csáki, former President of IAAE made summary comments on major issues discussed during the seminar. This volume includes the plenary and contributed papers presented at the seminar and submitted for publications by the authors as well as the abstracts of the poster papers discussed. The seminar was supported and sponsored by a number of organizations and persons. All of their contributions have to be greatly acknowledged. First the two international organizations IAAE and EAAE have to be mentioned, which provided overall organizational framework and logistical support. The IAAE provided in addition a generous grant to support the participation of young agricultural economists from Central and Eastern Europe on the seminar. On the Hungarian side the Corvinus University of Budapest, the Szent István University of GödöllÅ, the Research Institute for Agricultural Economics, the Hungarian Agricultural Economics Association, the Hungarian Association of Agricultural Sciences and the Hungarian Ministry of Agriculture and Rural Development were the major material and organizational supporters. The International Program committee was chaired by David Colman and Csaba Csáki and included Ulrich Koester, Joe Swinnen, Eugenia Serova and Jerzy Wilkin. The local Organizing committee was chaired by Csaba Forgács and István Szűcs and included Zoltán Lakner, András Nábrádi, József Popp, József Tóth, Gábor Udovecz, László Vajda, László Villányi, Krisztina Fodor, Attila Jámbor and Tamás Mizik. Finally IAMO, Halle facilitated the publication of this proceedings.Agribusiness, Agricultural Finance, Farm Management, Financial Economics, Industrial Organization, International Development, International Relations/Trade, Land Economics/Use, Production Economics,