933 resultados para Central African Republic


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In 2015 the UN Secretary-General established an External Independent Review to review how the United Nations has responded to allegations of child sexual exploitation and child sexual abuse, and to make recommendations concerning how the United Nations should respond to allegations in the future. This submission to the Review Panel draws on literature regarding children's rights, the nature of child sexual abuse, international instruments and policy, the nature of institutional child sexual abuse, and the CAR case itself. It makes recommendations for reform of UN protocols and procedures to better prevent child sexual abuse, and to improve responses to future occurrences.

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Satellite-based remote sensing of active fires is the only practical way to consistently and continuously monitor diurnal fluctuations in biomass burning from regional, to continental, to global scales. Failure to understand, quantify, and communicate the performance of an active fire detection algorithm, however, can lead to improper interpretations of the spatiotemporal distribution of biomass burning, and flawed estimates of fuel consumption and trace gas and aerosol emissions. This work evaluates the performance of the Spinning Enhanced Visible and Infrared Imager (SEVIRI) Fire Thermal Anomaly (FTA) detection algorithm using seven months of active fire pixels detected by the Moderate Resolution Imaging Spectroradiometer (MODIS) across the Central African Republic (CAR). Results indicate that the omission rate of the SEVIRI FTA detection algorithm relative to MODIS varies spatially across the CAR, ranging from 25% in the south to 74% in the east. In the absence of confounding artifacts such as sunglint, uncertainties in the background thermal characterization, and cloud cover, the regional variation in SEVIRI's omission rate can be attributed to a coupling between SEVIRI's low spatial resolution detection bias (i.e., the inability to detect fires below a certain size and intensity) and a strong geographic gradient in active fire characteristics across the CAR. SEVIRI's commission rate relative to MODIS increases from 9% when evaluated near MODIS nadir to 53% near the MODIS scene edges, indicating that SEVIRI errors of commission at the MODIS scene edges may not be false alarms but rather true fires that MODIS failed to detect as a result of larger pixel sizes at extreme MODIS scan angles. Results from this work are expected to facilitate (i) future improvements to the SEVIRI FTA detection algorithm; (ii) the assimilation of the SEVIRI and MODIS active fire products; and (iii) the potential inclusion of SEVIRI into a network of geostationary sensors designed to achieve global diurnal active fire monitoring.

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New structural, geochronological and paleomagnetic data were obtained on dolerite dikes of the Nola region (Central African Republic) at the northern border of the Congo craton. In this region metavolcanic, successions were thrust southward onto the craton during the Panafrican orogenic events. Our structural data reveal at least two structural klippes south of the present-day limits of the Panafrican nappe suggesting that it has once covered the whole Nola region, promoting the pervasive hydrothermal green-schist metamorphism observed in the underlying cratonic basement and also in the intrusive dolerite dikes. Paleomagnetic measurements revealed a stable dual-polarity low-inclination magnetization component in nine dikes (47 samples), carried by pyrrhotite and magnetite. This component corresponds to a paleopole at 304.8 degrees E and 61.8 degrees S (dp = 5.4, dm = 10.7) graded at 2 = 6. Both metamorphism and magnetic resetting were dated by the Ar-40/Ar-39 method on amphibole grains separated from the dikes at 571 +/- 6 Ma. The Nola pole is the first well-dated paleomagnetic pole for the Congo craton between 580 and 550 Ma. It marks a sudden change in direction of the Congo craton apparent polar wander path at the waning stages of the Panafrican orogenic events. (c) 2008 Elsevier B.V. All rights reserved.

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The state still matters. However, the members of the Euro-Atlantic community may be misinterpreting this crucial baseline prior launching their military interventions since 2001. The latest violence and collapse of the state of Iraq after the invasion of Northern Iraq by a radical Sunni Muslim terrorist group, so-called Islamic State of Iraq and Syria (ISIS), demonstrate once again the centrality and requirement of a functioning state in order to maintain violent forces to disrupt domestic and regional stability. Since 2001, the US and its European allies have waged wars against failed-states in order to increase this security and national interests, and then have been involved in some type of state-building.1 This has been the case in Afghanistan, Iraq, Libya, Mali, and Central African Republic (CAR). France went into Mali (2012) and CAR (2013), which preceded two European Union military and civilian Common Security and Defense Policy missions (CSDP), in order to avoid the collapse of these two states. The threat of the collapse of both states was a concern for the members of the Euro-Atlantic community as it could have spread to the region and causing even greater instabilities. In Mali, the country was under radical Islamic pressures coming from the North after the collapse of Libya ensuing the 2011 Western intervention, while in CAR it was mainly an ethno-religious crisis. Failed states are a real concern, as they can rapidly become training grounds for radical groups and permitting all types of smuggling and trafficking.2 In Mali, France wanted to protect its large French population and avoid the fall of Mali in the hands of radical Islamic groups directly or indirectly linked to Al-Qaeda. A fallen Mali could have destabilized the region of the Sahel and ultimately affected the stability of Southern European borders. France wanted to avoid the development of a safe haven across the Sahel where movements of people and goods are uncontrolled and illegal.3 Since the end of the Cold War, Western powers have been involved in stabilizing neighborhoods and regions, like the Balkans, Africa, and Middle East, which at the exceptions of the Balkans, have led to failed policies. 9/11 changes everything. The US, under President George W. Bush, started to wage war against terrorism and all states link to it. This started a period of continuous Western interventions in this post-9/11 era in Afghanistan, Iraq, Libya, Mali and CAR. If history has demonstrated one thing, the members of the Euro-Atlantic community are struggling and will continue to struggle to stabilize Afghanistan, Iraq, Libya, Mali and Central African Republic (CAR) for one simple reason: no clear endgame. Is it the creation of a state à la Westphalian in order to permit these states to operate as the sole guarantor of security? Or is the reestablishment of status quo in these countries permitting to exit and end Western operations? This article seeks to analyze Western interventions in these five countries in order to reflect on the concept of the state and the erroneous starting point for each intervention.4 In the first part, the political status of each country is analyzed in order to understand the internal and regional crisis. In a second time, the concept of the state, framed into the Buzanian trinity, is discussed and applied to the cases. In the last part the European and American civilian-military doctrines are examined in accordance with their latest military interventions and in their broader spectrum.

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The present booklet is the first part of a retrospective publication on the foreign trade of Madagascar and the African States (AASM) associated with the European Communities. It will be followed by about fifteen similar booklets dealing with the imports and exports of each of these countries; these booklets will together make up Volume I of the work. The second volume will set out the trade of all the AASM in each of the products shown in the Statistical and Tariff Classification for International Trade (CST);

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Pollutant plumes with enhanced concentrations of trace gases and aerosols were observed over the southern coast of West Africa during August 2006 as part of the AMMA wet season field campaign. Plumes were observed both in the mid and upper troposphere. In this study we examined the origin of these pollutant plumes, and their potential to photochemically produce ozone (O3) downwind over the Atlantic Ocean. Their possible contribution to the Atlantic O3 maximum is also discussed. Runs using the BOLAM mesoscale model including biomass burning carbon monoxide (CO) tracers were used to confirm an origin from central African biomass burning fires. The plumes measured in the mid troposphere (MT) had significantly higher pollutant concentrations over West Africa compared to the upper tropospheric (UT) plume. The mesoscale model reproduces these differences and the two different pathways for the plumes at different altitudes: transport to the north-east of the fire region, moist convective uplift and transport to West Africa for the upper tropospheric plume versus north-west transport over the Gulf of Guinea for the mid-tropospheric plume. Lower concentrations in the upper troposphere are mainly due to enhanced mixing during upward transport. Model simulations suggest that MT and UT plumes are 16 and 14 days old respectively when measured over West Africa. The ratio of tracer concentrations at 600 hPa and 250 hPa was estimated for 14–15 August in the region of the observed plumes and compares well with the same ratio derived from observed carbon dioxide (CO2) enhancements in both plumes. It is estimated that, for the period 1–15 August, the ratio of Biomass Burning (BB) tracer concentration transported in the UT to the ones transported in the MT is 0.6 over West Africa and the equatorial South Atlantic. Runs using a photochemical trajectory model, CiTTyCAT, initialized with the observations, were used to estimate in-situ net photochemical O3 production rates in these plumes during transport downwind of West Africa. The mid-troposphere plume spreads over altitude between 1.5 and 6 km over the Atlantic Ocean. Even though the plume was old, it was still very photochemically active (mean net O3 production rates over 10 days of 2.6 ppbv/day and up to 7 ppbv/day during the first days) above 3 km especially during the first few days of transport westward. It is also shown that the impact of high aerosol loads in the MT plume on photolysis rates serves to delay the peak in modelled O3 concentrations. These results suggest that a significant fraction of enhanced O3 in mid-troposphere over the Atlantic comes from BB sources during the summer monsoon period. According to simulated occurrence of such transport, BB may be the main source for O3 enhancement in the equatorial south Atlantic MT, at least in August 2006. The upper tropospheric plume was also still photochemically active, although mean net O3 production rates were slower (1.3 ppbv/day). The results suggest that, whilst the transport of BB pollutants to the UT is variable (as shown by the mesoscale model simulations), pollution from biomass burning can make an important contribution to additional photochemical production of O3 in addition to other important sources such as nitrogen oxides (NOx) from lightning.