I. Muntele

Dans un premier temps, nous proposons une réflexion théorique sur les problèmes et les enjeux de la communication des territoires à travers le rôle de la carte. Le travail s'est focalisé sur la mise au point d'un système de communication cartographique pour la Roumanie. Nous décrivons les modalités concrètes qui ont permis d'élaborer le fond de carte numérique des 2'948 communes roumaines et les bases de données qualitatives et quantitatives permettant des représentations automatiques des géométries variables du puzzle spatial de l'espace roumain. Un deuxième volet, de nature rétrospective, tente de fixer les cadres étatiques de l'organisation légale du territoire roumain en abordant l'historicité du maillage administratif dont les découpages communaux actuels sont issus. Un troisième volet illustre certains maillages géographiques essentiels de la Roumanie, supports obligés de toute réflexion prospective tant il est possible de tirer profit d'une con...

This study analyses gender emigration in Bacău and Vaslui counties, focusing on the main problem raised by it. The article starts with an analysis concerning the total emigrant registered at 2011 census. The second part brings forward the problem of emigration by gender which give a clear view over the situation present in the counties mentioned above. Starting from these remarks the article tries a report on the situation of the two counties using cartographic examples to provide a clearer picture of the situation and to facilitate subsequent comparisons between the two counties which faces various stages of emigration.

"The ageing of rural population in Romania is becoming increasingly serious as regions which are endangered by this phenomenon have to face the additional problem of the reprivatisation of agricultural land. This has been analysed at departmental level based on the 1930, 1966, 1977 and 1992 censuses respectively.... The modes of evolution of this ageing phenomenon have been classified into different types. Two factors, demographic change and rural exodus, account for this development whose geographical configuration has changed over half a century." (SUMMARY IN ENG AND RUM)

... une longue période les régions du nord et de l'est du pays (Moldavie, Transilvanie) mais aussi les judets de Constanţa et de ... De la fatalité à l'espérance, Fayard, Paris Thusnelda Tivig, Katarina Frosch, S.Kühntopf (2008), Mapping Regional Demographic change and Regional ...

Grasland, Claude (författare) Ysebaert, Ronan (författare) Corminboeuf, Bernard (författare) visa fler... Gaubert, Nicolas (författare) Lambert, Nicolas (författare) Salmon, Isabelle (författare) Baro, Myriam (författare) Baudet-Michel, Sophie (författare) Ducom, Estelle (författare) ...

ABSTRACT The ethylenetetrafluoroethylene (ETFE) is a polymer formed by alternating ethylene and tetrafluoroethylene segments. It has high impact resistance and useful mechanical properties. ETFE can be used as components of pumps, valves, tie wraps, and electrical components. It can also be applied in the field of medical physics as intra venous catheters and as radiation dosimeter. When a material is exposed to the ionizing radiation, it suffers damage that depends on the type, energy and intensity of the radiation. In order to determine the radiation damage mechanism, ETFE films were bombarded with 1 MeV protons to the fluence between 1 × 1011 and 1 × 1016 protons/cm2 and the chemical species emitted during the bombardment were measured with residual gas analysis (RGA) and show that HF gas is the entity preferentially emitted. Optical absorption photospectrometry (OAP) and attenuated total reflectometry fourier transform infrared (ATR-FTIR) shows quantitative chemical evidence of the damage. Our results show that damage is detectable at low proton fluence, but damage that can compromise the application in dosimetry occurs only for fluence greater than 1014 protons/cm2.

ABSTRACT We made 50 and 100 periodic nano-layers of electro-cooling system consisting of SiO2/AuxSiO2(1−x) super lattice with Au layer deposited on both side as metal contact using Ion Beam Assisted Deposition (IBAD) system. The deposited multi-layer films have a periodic structure consisting of alternating layers where each layer is between 1-10 nm thick. The ultimate objective of this research is to tailor the figure of merit of layered structures used as thermoelectric generators. The super lattices were then bombarded by 5 MeV Si ion at different four fluences to form nano-cluster structure. The film thickness and stoichiometry were monitored by Rutherford Backscattering Spectrometry (RBS) before and after MeV bombardments. We measured the thermoelectric efficiency of the fabricated device before and after MeV bombardments. To accomplish this we measured the cross plane thermal conductivity by 3rd harmonic method, measured cross plane Seebeck coefficient, and measured electric conductivity using Van Der Pauw method before and after 5 MeV Si Bombardments. As predicted the electronic energy deposited due to ionization by MeV Si beam in its track produces nano-scale structures which disrupt and confine phonon transmission therefore reducing thermal conductivity, increasing electron density of state so as to increase Seebeck coefficient, and electric conductivity, thus increasing figure of merit. We will present our findings during the meeting.* Research sponsored by the Center for Irradiation of Materials, Alabama A&M University and by the AAMURI Center for Advanced Propulsion Materials under the contract number NAG8-1933 from NASA, and by National Science Foundation under Grant No. EPS-0447675.

Low energy ion beam bombardment of ethylenetetrafluoroethylene (ETFE) modifies the physical and chemical properties of the polymer surface in ways that enhance or compromise applications in the technological and medical physics fields. When a material ...