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Foreign Direct Investment and Productivity Spillovers: the Experience of ASEAN Countries
( Nicolas Peridy ),( Nathapornpan Piyaareekul Uttama ) 세종대학교 경제통합연구소 (구 세종대학교 국제경제연구소) 2010 Journal of Economic Integration Vol.25 No.2
This paper aims at investigating the productivity spillover effects of FDI inflows to ASEAN countries. A first contribution is related to the development of an original theoretical model of complex multinational firms which simultaneously explores backward and forward linkages due to FDI. As a second contribution, the significance of vertical productivity spillovers in ASEAN countries is tested empirically. For that purpose, and given the lack of data at firm level, the causal relationship between FDI and productivity is investigated by using countryspecific data. Several alternative causality tests are implemented, including both direct and indirect approaches. The main results give strong evidence that FDI causes productivity growth in ASEAN countries. These results correlate the prediction of the theoretical model, which provide a strong support for the relationship between FDI and productivity spillovers.
Assessment of GOCI Radiometric Products using MERIS, MODIS and Field Measurements
Nicolas Lamquin,Constant Mazeran,David Doxaran,류주형,박영제 한국해양과학기술원 2012 Ocean science journal Vol.47 No.3
The first Geostationary Ocean Color Imager (GOCI) launched by South Korea in June 2010 constitutes a major breakthrough in marine optics remote-sensing for its capabilities to observe the diurnal cycles of the ocean. The light signal recorded at eight wavelengths by the sensor allows, after correction for Solar illumination and atmospheric effects, the retrieval of coloured biogeochemical products such as the chlorophyll, suspended sediment and coloured dissolved organic matter concentrations every hour between 9:00 am and 4:00 pm local time around the Korean peninsula. However operational exploitation of the mission needs beforehand a sound validation of first the radiometric calibration, i.e. inspection of the top-of-atmosphere reflectance, and second atmospheric corrections for retrieval of the water-leaving reflectance at sea surface. This study constitutes a contribution to the quality assessment of the GOCI radiometric products generated by the Korea Ocean Satellite Center (KOSC) through comparison with concurrent data from the MODerate-resolution Imaging Spectroradiometer (MODIS, NASA) and MEdium Resolution Imaging Spectrometer (MERIS, ESA) sensors as well as in situ measurements. These comparisons are made with spatially and temporally collocated data. We focus on Rayleigh-corrected reflectance (ρRC) and normalized remote-sensing marine reflectance (nRrs). Although GOCI compares reasonably well with MERIS and MODIS, what demonstrates the success of Ocean Colour in geostationary orbit, we show that the current GOCI atmospheric correction systematically masks out data over very turbid waters and needs further examination and correction for future release of the GOCI products.
Recent Upgrades to the Nuclear Data Tool JANIS
Nicolas Soppera,Manuel Bossant,Emmeric Dupont,Hans Henriksson,Yolanda Rugama 한국물리학회 2011 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.59 No.23
JANIS (JAva-based Nuclear Information Software) is a display program designed to facilitate the visualisation of nuclear data, such as decay data, fission yields, cross sections, energy and angular distributions etc. Its objective is to allow the user of nuclear data to access numerical and publication-ready graphical representations without prior knowledge of the storage format. The most common nuclear data formats are supported, and data originating from the major evaluated libraries, such as JEFF, JENDL, ENDF/B, CENDL etc., can be displayed, computed, and compared together and with experimental reaction data from the EXFOR database. In addition, various navigation and search tools are available to explore the nuclear databases. The JANIS software can be used either as a standalone application or directly from the web at www.nea.fr/janis. This software has developed into a popular tool among students and researchers working with nuclear data. Features included in the latest release are described, including plots of covariance matrices and photon-production data. Some examples on the use of JANIS will be given and foreseen development discussed.
Micropropagation of cocoyam (Xanthosoma sagittifolium L. Schott) in temporary immersion bioreactor
Nicolas Niemenak,Alexandre Mboene Noah,Denis Ndoumou Omokolo 한국식물생명공학회 2013 Plant biotechnology reports Vol.7 No.3
This study aims at establishing a temporaryimmersion technique for large-scale propagation ofcocoyam (Xanthosoma sagittifolium). Sucrose was experimentedwith as a determinant factor for shoot multiplicationin this culture system. The highest proliferation rate(68 ± 7) occurred with 20 g l-1 sucrose in the culturemedium. This concentration appeared to be the optimalamount due to its promoting effect on plantlet development. The acclimatized plantlets showed a continuouseffect of sucrose treatment during ex vitro growth, especiallyin low sucrose concentration. This fact is evidencedby the low survival rate (0.13 ± 0.12) and the poor chlorophyllcontent (1.180 ± 0.076 mg g-1) recorded onplantlets derived from 15 g l-1 of sucrose. The treatmentwith 60 g l-1 of sucrose prior to acclimatization was efficientfor roots induction and elongation. The analysis of pHrevealed a fluctuation from one subculture to another, withan overall pH decrease under all treatments tested and,thus, indicates that plants release proton during growth. This feature had an impact on in vitro plantlets growth. Thepotentiality of the temporary immersion technique to fosterthe production of Xanthosoma sagittifolium is discussed.
The JAK/STAT Pathway Is Involved in Synaptic Plasticity
Nicolas, Cé,line ,S.,Peineau, Sté,phane,Amici, Mascia,Csaba, Zsolt,Fafouri, Assia,Javalet, Charlotte,Collett, Valerie ,J.,Hildebrandt, Lars,Seaton, Gillian,Choi, Sun-Lim,Sim, Su-Eo Cell Press 2012 Neuron Vol.73 No.2
<▼1><P><B>Summary</B></P><P>The Janus kinase (JAK)/signal transducer and activator of transcription (STAT) pathway is involved in many cellular processes, including cell growth and differentiation, immune functions and cancer. It is activated by various cytokines, growth factors, and protein tyrosine kinases (PTKs) and regulates the transcription of many genes. Of the four JAK isoforms and seven STAT isoforms known, JAK2 and STAT3 are highly expressed in the brain where they are present in the postsynaptic density (PSD). Here, we demonstrate a new neuronal function for the JAK/STAT pathway. Using a variety of complementary approaches, we show that the JAK/STAT pathway plays an essential role in the induction of NMDA-receptor dependent long-term depression (NMDAR-LTD) in the hippocampus. Therefore, in addition to established roles in cytokine signaling, the JAK/STAT pathway is involved in synaptic plasticity in the brain.</P></▼1><▼2><P>The authors demonstrate a new neuronal function for the JAK/STAT pathway in the induction of NMDA-receptor-dependent long-term depression (NMDAR-LTD) in the hippocampus.</P></▼2>
Regional Integration and Real Convergence: Evidence from MENA Countries
( Nicolas Peridy ),( Corinne Bagoulla ) 세종대학교 경제통합연구소 2012 Journal of Economic Integration Vol.27 No.1
This article analyses and explains the real convergence process in MENA countries over the past 50 years. It provides a threefold contribution. Firstly, given the recent increasing attention paid to the Euro-Mediterranean area, it focuses on the convergence of MENA countries towards the EU per capita income. Second, it provides an econometric modelling of the determinants of convergence. Finally, it is based on a wide set of convergence indicators applied to various measures of per capita income as well as the Human Development Index (HDI). Results show that despite a lack of s-convergence for the MENA region taken as a whole, the convergence hypothesis is accepted using the g and β-convergence tests, especially for Tunisia, Egypt, Turkey and Morocco. However, there is evidence of divergence for Jordan and Algeria. It is also shown that the convergence process strongly depends on education, R&D, transport and infrastructure as well as public investment. By contrast, there is no direct impact of the regional integration process with the EU, although the EIB loans positively contribute to the convergence process. Finally, trade specialization and firm agglomeration have been detrimental to convergence of MENA countries.