Dynamique des stratégies de coopétition dans le secteur des TIC: le cas des ERP

(VF)La coopétition devient un mode relationnel de plus en plus répandu dans l’industrie des TIC. Or, les stratégies de coopétition sont par nature paradoxales, car elles combinent la coopération et la concurrence qui sont a priori mutuellement exclusives. Ce type de stratégie est-il viable à moyen et long terme ? Au contraire, la coopétition est-elle une relation transitoire qui évoluerait soit vers la coopération, soit vers la concurrence ? Afin de répondre à ces questions, cette recherche étudie de façon longitudinale une industrie TIC, celle des ERP. Elle montre que la coopétition est bien une stratégie de long terme dans ce secteur.(VA)Coopetition as a relational mode progressively spreads over the ICT industry. However, coopetition strategies are by nature paradoxical, because they combine cooperation and competition which are a priori mutually exclusive. Is this type of strategy viable in the medium and long run? Or is coopetition an unstable relational mode which eventually evolves either towards cooperation, or towards competition? To answer these questions, this research reports results gained from a longitudinal study of a specific ICT industry, namely the ERP sector. It shows that coopetition is a viable longterm strategy in this sector.coopétition;compétition;alliance;TIC;coopetition;competition;ICT.

Is Geographical Indication Acting on Rice Export Price?

Representing 30% of food intake of 60% of planet’s inhabitants, rice is a staple food all over the world. According to FAO, worldwide rice production is about 504 million tons (milled basis) in 2017, while international rice trade is 45 million tons. With almost 9% exported, rice is not the top trade food commodity. 43% of wine worldwide produced is exported, 23% of wheat, 11% of maize and 7% of meat.The rice market is mainly composed of coarse rice all over the world. It also includes 18% of aromatic rice, coming from a limited number of countries where the pedoclimatic conditions and human know-how make a specific terroir. Aromatic rice is often protected by a Geographical Indication (GI). This is the case of Basmati, from India and Pakistan, using a collective trade mark since 2008 in Pakistan, and Jasmine from Thailand, bearing a Protected Geographical Indication (PGI) as Khao Hom Mali, since 2013

Active Microwave Circuit With Negative Group Delay

"©2007 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE."International audienceIn this letter, we report on the design, simulation and implementation of an active negative group delay circuit that operates at 1 GHz with a group delay and a gain, respectively, around -2 ns and 2 dB. Analytical formulas are proposed to demonstrate that the adopted topology is able to simultaneously achieve negative group delay (NGD) and gain while fulfilling active device constraints. The theoretical and simulated results are both validated by frequency measurements of a two-stage active microwave circuit

Impacts of greenhouse gases and aerosol direct and indirect effects on clouds and radiation in atmospheric GCM simulations of the 1930-1989 period

Among anthropogenic perturbations of the Earth\''s atmosphere, greenhouse gases and aerosols are considered to have a major impact on the energy budget through their impact on radiative fluxes. We use three ensembles of simulations with the LMDZ general circulation model to investigate the radiative impacts of five species of greenhouse gases (CO2, CH4, N2O, CFC-11 and CFC-12) and sulfate aerosols for the period 1930-1989. Since our focus is on the atmospheric changes in clouds and radiation from greenhouse gases and aerosols, we prescribed sea surface temperatures in these simulations. Besides the direct impact on radiation through the greenhouse effect and scattering of sunlight by aerosols, strong radiative impacts of both perturbations through changes in cloudiness are analysed. The increase in greenhouse gas concentration leads to a reduction of clouds at all atmospheric levels, thus decreasing the total greenhouse effect in the longwave spectrum and increasing absorption of solar radiation by reduction of cloud albedo. Increasing anthropogenic aerosol burden results in a decrease in high-level cloud cover through a cooling of the atmosphere, and an increase in the low-level cloud cover through the second aerosol indirect effect. The trend in low-level cloud lifetime due to aerosols is quantified to 0.5 min day-1 decade-1 for the simulation period. The different changes in high (decrease) and low-level (increase) cloudiness due to the response of cloud processes to aerosols impact shortwave radiation in a contrariwise manner, and the net effect is slightly positive. The total aerosol effect including also the aerosol direct and first indirect effects remains strongly negative

Plasma amino-acid determinations by reversed-phase HPLC: Improvement of the orthophthalaldehyde method and comparison with ion exchange chromatography

Reversed-phase high performance liquid chromatographic (RPHPLC) determination of amino-acids with on-line pre-column ortho-phthalaldehyde (OPA) derivatization and fluorescence detection is rapid and sensitive. However, high-performance ionexchange chromatography (HP-IEC) with post-column ninhydrine reaction is the most widely used amino-acid (AA) assay for biological samples. These two methods have been compared for the determination of individual plasma AA concentrations

Idealized model for changes in equilibrium temperature, mixed layer depth, and boundary layer cloud over land in a doubled CO2 climate

An idealized equilibrium model for the undisturbed partly cloudy boundary layer (BL) is used as a framework to explore the coupling of the energy, water, and carbon cycles over land in midlatitudes and show the sensitivity to the clear‐sky shortwave flux, the midtropospheric temperature, moisture, CO2, and subsidence. The changes in the surface fluxes, the BL equilibrium, and cloud cover are shown for a warmer, doubled CO2 climate. Reduced stomatal conductance in a simple vegetation model amplifies the background 2 K ocean temperature rise to an (unrealistically large) 6 K increase in near‐surface temperature over land, with a corresponding drop of near‐surface relative humidity of about 19%, and a rise of cloud base of about 70 hPa. Cloud changes depend strongly on changes of mean subsidence; but evaporative fraction (EF) decreases. EF is almost uniquely related to mixed layer (ML) depth, independent of background forcing climate. This suggests that it might be possible to infer EF for heterogeneous landscapes from ML depth. The asymmetry of increased evaporation over the oceans and reduced transpiration over land increases in a warmer doubled CO2 climate