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221	New Generation 4-Channel GNSS Receiver : Design, Production, and Testing Antoja Lleonart, Guillem January 2018 (has links) Due to the current research needs and the lack of commercial multi-channel, multi-constellation GNSS receivers, a two-board solution has been developed so it can be mated with and take advantage of the processing power of the FPGA board branded as MicroZed. In order to achieve the proposed goals, an initial phase for assessing and updating the older design, building, and testing of SiGe modules (including both the electronics and casings) has been carried out. The results included demonstrate performances at logging GPS-L1 data with similar C/N0 and AGC values as the previous versions of the modules and offering navigation solutions with accuracies of a few meters. Secondly, a first iteration and design proposal for the new generation receiver has been proposed for GPS and GLONASS L1 and L2, which has been manufactured and tested. Partial tests have been performed due to the flaws of the current revision of the MicroZed Board in regards to its communication peripherals, and the results have validated the receiver’s design provided certain modifications are considered for future iterations. Furthermore, voltage and frequency tests have provided results with an error of less than 7%, and signal tests have provided C/N0 values similar to those of the SiGe modules of around 47[dB-Hz] which will be a useful baseline for future iterations. Finally, a design proposal for an Interface Board used between the older NT1065_PMOD Board and other FPGA boards carrying the standardized FMC connectors has been added to the report and negotiations with manufacturers have been engaged. gnss gps galileo glonass beidou constellation receiver new generation 4-channel design pcb shield front end nt1065 biastee bias t bias tee sma saw filter fpga microzed microheader digital analog lvds single end agc selector Telecommunications Telekommunikation Signal Processing Signalbehandling Communication Systems Kommunikationssystem
222	Investigations On The Effect Of Process Parameters On The Composition Of DC Magnetron Sputter Deposited NiTi Shape Memory Alloy Thin Films Sumesh, M A 09 1900 (has links) (PDF) No description available. Thin Films Thin Film Deposition Nickel Titanium Thin Films Nickel Titanium Shape Memory Alloys Martensitic Transformations Shape Memory Effect Shape Memory Alloy (SMA) Sputter Deposition NiTi Thin Films Magnetron Sputtering Mosaic Target Synthesis NiTi Shape Memory Alloy Instrumentation
223	Les traditions céramiques dans leur contexte archéologique sur le littoral camerounais (Kribi-Campo) de 3000 à 500 BP / Ceramic traditions in their archaeological context on the coast of Cameroon (Kribi-Campo) from 3000 to 500 BP Nlend Nlend, Pascal 18 October 2013 (has links) Les recherches archéologiques sur le littoral méridional du Cameroun ont connu un essor depuis le début des années 2000. Les prospections, ont mis en évidence trente-huit sites archéologiques dans la région de Kribi-Campo. L’analyse du matériel issu des fouilles révèle l’existence de trois traditions céramiques régionales et d’un groupe plus local, datés de 1100 BC à AD 1460. Cela correspond à la transition de l’Age de la Pierre à l’Age du Fer Ancien, et à un contexte paléo-environnemental qui varie entre phases sèches et humides. Ses populations avaient un mode de subsistance basé sur la cueillette, la chasse, la pêche et probablement l’agriculture. Sédentaires, elles creusaient des fosses dont certaines ont eu des fonctions rituelles. Au cours de l’Age du Fer Ancien, des structures funéraires ont été identifiées. La disposition particulière des poteries et leur association à de multiples objets en fer semblent indiquer qu’on serait en présence de tombes d’une élite. Cela suggère la présence d’une société hiérarchisée s’étendant au-delà de la région de Kribi-Campo jusqu’en Guinée équatoriale il y a environ 2000 ans./Archaeological research on the southern coast of Cameroon has been rapidly expanding since the beginning of 2000. Recent surveys revealed 38 archaeological sites in the Kribi-Campo region. The analysis of the material extracted from excavations provides three regional ceramic traditions and one local ceramic group, dated between 1100 BC and 1460 AD. This corresponds to the transitional period of the Late Stone Age and Early Iron Age, which from a palaeoenvironmental perspective, was characterized by dry and humid phases. <p>This population lived a sedentary lifestyle, based on hunting, gathering, fishing and probably also on agriculture. They dug out pits, of which some might have had a ritual function.<p> Funerary structures were identified, dating to the Early Iron Age. The specific disposition of pots and their association with different iron objects seem to indicate the presence of elite graves. This hierarchical society might have spread beyond the Kribi-Campo region about 2000 years ago as similar burial sites were found in Equatorial Guinea.<p> / Doctorat en Histoire, art et archéologie / info:eu-repo/semantics/nonPublished Histoire Sciences humaines Excavations (Archaeology) -- Cameroon Pottery -- Cameroon Iron age -- Cameroon Fouilles (Archéologie) -- Cameroun Céramique -- Cameroun Age du fer -- Cameroun Cameroon -- Antiquities Cameroun -- Antiquités SMA Littoral camerounais Groupe Tombes Tradition/Early Iron Age Burials Tradition Age du Fer Ancien Céramique Coast of Cameroon Group Ceramic

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