The MooSciTIC project: a booster shot of science for West African research and higher education actors
Ménonvè AtindehouKifouli AdéotiYêyinou Laura Estelle LokoThierry BeuléEmmanuel ParadisGustave DjèdatinChristine Tranchant‐DubreuilFrançois SabotLatifou LagnikaEstelle Jaligot
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In this paper, we describe the implementation of the MooSciTIC summer schools, a capacity-building initiative targeting West African research scientists and higher education teachers. Throughout the three years of the project, we provided on-site courses and practicals on cross-disciplinary aspects such as scientific writing, communication and integrity, in the aim of improving the self-reliance of researchers and upgrading research practices throughout the sub-region. We explain how the program was designed and implemented and we show the positive outcomes it generated for our former trainees within a relatively short period, hoping to inspire similar initiatives to follow our steps.Keywords:
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We describe our progress on the development of a Ka-band TWT driver-booster combination to produce >1kW over a 5 GHz band centered at 35 GHz. The driver is an existing > 500 Watt broadband coupled-cavity TWT 1 , employing a 2 stage depressed collector. The power booster is a newly designed sever-less folded waveguide TWT designed to provide 3-4 dB of additional gain. The booster also uses a 2 stage depressed collector and a slightly modified version of the same electron gun used in the driver. A photo of the driver and booster under test is shown in Fig. 1. The principal challenges that had to be met in a booster design were: (1) achieving the required output power and bandwidth, (2) ensuring stable booster operation under both small and large signal conditions and (3) presenting a good output match to the driver so that the driver remains stable.
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Boosters are generally necessary to launch spacecraft into Earth orbit or beyond. The booster is dropped to fall back to Earth once its fuel is expended, a point known as booster engine cut-off (BECO). The rest of the launch vehicle continues flight with its core or upper-stage engines. The booster may be recovered and reused, as in the case of the Space Shuttle .
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Abstract Current booster seats do not offer effective protection in side impact. Previous studies have suggested that the level of protection provided by boosters in side impact can be substantially improved through relatively minor design changes to booster seat geometry. Previous studies have also shown that booster seat performance can be significantly enhanced by rigidly anchoring booster seats to the vehicle structure. The aim of this study is to demonstrate how the level of side impact protection in booster seats can be increased through attention to booster seat geometry and booster seat anchorage. A high back booster seat prototype was designed and manufactured. It incorporates a rigid attachment, deep side wings, and a height adjustment system. It was then tested in side impact using a Hybrid III 6 year old dummy on a sled with a non-intruding side door structure. The improved design features of the prototype were then compared, in terms of the level of protection provided to the dummy, to the performance of two current booster seats available on the Australian market. Different upper side wings configurations were also tested. The prototype was also tested in frontal impact to verify that the level of protection had been maintained in that impact direction. Unlike current booster seat designs, the prototype succeeded in fully containing the dummy in all tests, therefore preventing contact with the side door structure. In 90 degree impacts, the prototype was found to reduce the HIC36 results by up two thirds when compared to the two current booster seats. The upper neck loads were also considerably reduced. While side wing height and depth was found to be an important feature in achieving these reductions in injury risk, side wing angle was found to have less of an effect. This study confirms that it is possible to offer significantly improved side impact protection in booster seats by using a rigid anchorage system, deep side wings and a height adjustment system.
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This paper describes a photovoltaic (PV) cell booster with a flyback converter. The booster is developed to simulate large size of PV panel and is utilized to examine various PV power systems. Configuration of the booster is simple and easy to build. Principle of the PV cell booster is described. Prototype of the booster is built and tested to confirm the effectiveness of the PV cell booster.
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The Five Segment Reusable Solid Rocket Booster (RSRB) feasibility status is presented in viewgraph form. The Five Segment Booster (FSB) objective is to provide a low cost, low risk approach to increase reliability and safety of the Shuttle system. Topics include: booster upgrade requirements; design summary; reliability issues; booster trajectories; launch site assessment; and enhanced abort modes.
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The booster of a flat flight solid rocket is introduced. The focal points of introduction are to establish the main parameters of the solid rocket booster and the heat transfer analysis of the booster case. The practical example is given and its design parameters are compared with its tested results. It is indicated that the design and analysis methods are correct.
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It is often suggested to a T.V. viewer in the fringe area that incorporation of a Booster Amplifier in his receiving installation would give rise to significant improvement in the quality of reception. An analysis of the performance of the Booster Amplifier has been made with simplifying assumptions. The analysis shows that the Booster does very little improvement in reception so far as V.H.F. channels are concerned. Limited tests carried out so far confirm this. The Booster, however, may have better utility in U.H.F. channels principally due to the much lower antenna temperatures. In all cases an improvement is feasible where this device is installed right on the antenna.
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