Ce mémoire présente la conception de différents systèmes antennaires miniatures devant fonctionner dans des conditions environnementales et climatiques sévères, mais également capables d’opérer dans plusieurs bandes de fréquence ISM et plusieurs standards de communications mobiles. Ce système antennaire dédié infine à l’intégration dans les modules TRAX-BOX développés par la société TRAXENS, doit satisfaire différents critères techniques, industriels et économiques, définis par leur application finale qui est le suivi de conteneurs métalliques multimodaux de grandes dimensions. Pour cela, le système doit présenter un fonctionnement multibande et large bande, un diagramme de rayonnement omnidirectionnel, une bonne efficacité, un encombrement réduit permettant une intégration simple et efficace dans son boîtier, une rigidité mécanique permettant au système d’être protégé contre les vibrations et les chocs, une large plage de températures de fonctionnement et un faible coût de fabrication. Ces exigences techniques et industrielles sont souvent difficiles à satisfaire simultanément. Pour ce faire, plusieurs techniques de conception de systèmes multi-antennaires multibandes ont été employées. L’insertion de fentes sur les résonateurs et la juxtaposition d’éléments parasites a tout d’abord permis d’élargir la bande des antennes. En ce qui concerne l’isolation mutuelle des antennes, l’insertion de fentes sur le plan de masse, est l’une des techniques qui permettent d’isoler les antennes. / This thesis presents the design of different small antenna systems, operating in harsh environmental and climatic conditions, but also be able to operate in several ISM frequency bands and several mobile communication standards. This antenna system designed to be integrated in the TRAXBOX modules developed by TRAXENS, must meet various technical, industrial and economic criteria, defined by their final application which is the monitoring of multimodal metallic containers. To this end, the system must provide a multiband and wideband operations, an omnidirectional radiation pattern, a good efficiency, a reduced size allowing an easy and efficient integration into its housing, mechanical rigidity allowing the system to be protected against vibrations and shocks, a wide operating temperature range and low manufacturing cost. These technical and manufacturing requirements are often difficult to simultaneously satisfy. To do this, several design techniques of multiband multi-antenna systems have been employed. The use of slots and parasitic elements has first allowed widening the antennas bands. Regarding the mutual isolation of the antennas, the insertion of slots on the ground plane is one of the techniques that improve the antennas isolation. However, in this manuscript, we have mainly focused on the optimal layout of the parasitic resonators to simultaneously increase the bandwidth but also optimize the system efficiency and the isolation between antennas after interpretation of the various physical phenomena observed.

A creative incubator for global nomads. The Standard Hotel, reimagined and transformed intoa vibrant, dynamic hub for global nomads who value transience over permanence. Repurposed to inspirethe cross-pollination of ideas, it serves as a temporary home for those in a perpetual state of transition. Designed to generate serendipitous interactions, it exists to connect people of different social classes and histories.

International Telemetering Conference Proceedings / October 20-23, 2003 / Riviera Hotel and Convention Center, Las Vegas, Nevada / The Consultative Committee for Space Data Systems (CCSDS) is an international organization of national space agencies that is branching out to provide new standards to enhanced reuse of spacecraft equipment and software. These Spacecraft Onboard Interface (SOIF) standards will be directed towards a spacecraft architecture, as a distributed system of processors and busses. This paper will review the services that are being proposed for SOIF. These services include a Command and Data Acquisition Service, a Time Distribution Service, a Message Transfer Service, a File Transfer Service, and a CCSDS Packet Service. An Instrument & Subsystem “Plug & Play Service is currently under study, but is included in this paper for completeness.

published_or_final_version / Economics and Finance / Master / Master of Economics

No description available.

Denna uppsats jämför maltdryckproduktionen i Sverige åren 1880 och 1900, för att undersöka om/hur produktionen av maltdrycker påverkades av införandet av den standardiserade glasbuteljen, den så kallade Stockholmsflaskan, 1885. Uppsatsen utgår från ett grundantagande att standardflaskan påverkade maltdrycksproduktionen positivt, från att denna näring stått relativt stilla fram till dess. Med andra ord är grunduppfattningen att standardflaskan katalyserade en större maltdrycksproduktion i Sverige. Metoden som används i denna uppsats var en statistisk jämförelse, där mått och tabeller först konverterats och gjorts överskådliga i dagens mått mätt. Resultatet i denna uppsats visar att det redan innan Stockholmsflaskans införande fanns en stegrande produktion av maltdrycker. Detta berodde på politisk-ekonomiska förändringar som gjorde det lättare att bedriva verksamhet, samt att det Bayerska ölet (som kom till Sverige 1846) ökade i popularitet. En markant ökning av maltdryckproduktionen i Sverige under tjugoårsperioden 1880-1900 äger rum, då i princip all öltillverkning övergick till att gå till på Bayerskt vis. Undersökningen visar också att en ny gren inom bryggerinäringen, buteljvatten och läsk, tillkom under denna period, och det är rimligt att anta att den gjorde det pga Stockholmsflaskan. Bayerskt öl krävde en snabb effektiv tappning, allra helst i maskin. Det är därför ett rimligt antagande att eftersom så mycket av det öl som producerades i Sverige år 1900 var just Bayerskt, berodde produktionsökning på att en standardflaska gjorde en så stor produktion möjlig.

The first measurement of the ratio of the W and Z cross sections in association with a single jet, known as the R_{Jets} measurement, is presented. The measurement was performed using 33pb^-1 of integrated luminosity, recorded during the year 2010 by the ATLAS detector at the LHC. At this time the LHC was operating at a center-of-mass energy of 7 TeV. The measurement is made as a function of the threshold on the jet transverse momentum, from 30 GeV up to a value of 200 GeV. The motivation for this measurement is outlined in terms of providing a stringent test of the Standard Model of particle physics, as well as a model independent tool for searching for new physics. Data driven tools are developed to perform the measurement and their performance is discussed. The result of the measurement is compared with the predictions of Next-to-Leading order perturbative QCD and found to be in good agreement over the entire range of transverse momenta considered.

With the ever increasing popularity of wireless internet, its scale is broadening. While the IEEE 802.15 standard provides the parameters necessary for a wireless personal area network (WPAN), the IEEE 802.16a standard provides broadband wireless access (BWA), or a wireless metropolitan area network (WMAN). Popularly referred to as Wi Max, the standard uses cellular topography with a base station and subscriber station and cuts down on infrastructure and thus can be used in most environments. The 802.16a standard can take advantage of the popular OFDM modulation technique. This thesis takes a developed synchronization algorithm and tests its performance on 802.16a. In addition, it tests the standard's performance in different types of channel. Various techniques are evaluated including interleaving and antenna diversity. The 802.16a standard employs a form of transmit diversity called Space Time Coding. The transmit diversity is compared with Maximal Ratio Combining receiver diversity. The evaluation was done in simulation developed in Matlab; the simulations show drastic improvement when using the aforementioned techniques, particularly diversity.

This research analyzes the design and implementation of a Maritime Command, Control, Computer, and Communications for Intelligence, Surveillance, and Reconnaissance (C4ISR) fly away kit (FLAK) in order to combat asymmetric threats in the coalition maritime environment. This FLAK will be modular, adaptable, scalable, and secure end to end, composed of routable networks, and built entirely from commercial off the shelf technologies (COTS). Basing measures of effectiveness (MOE) on the recently published Quadrennial Defense Report (QDR) and the Numbered Fleet Commanders Communication Message, these kits will be tested with the goal of fulfilling thirteen of the fifteen high priority short-falls in the modern United States CIV-MIL and Coalition Forces' abilities to conduct multiple missions in the current brown (riverine), green (littoral), and blue (deep water) operational theatres. The Maritime FLAK will be designed with the intent of increasing the US forward presence and extending the C4ISR into restricted maritime theatres. Since US forces cannot intervene directly into regions like the Straits of Malacca, but can support coalition forces through advisors and technological adaptations, modular solutions to extend C4ISR into these maritime territories are needed. Furthermore, due to the adaptability and scalability of the technologies to be implemented into the maritime FLAK, these completed kits will be able to be used by the recently formed Naval Expeditionary Combat Command (NECC) in current operations in the Global War on Terrorism. / US Navy (USN) author.

The Coalition Operating Area Surveillance and Targeting System (COASTS) program is a joint project between the Naval Postgraduate School and the Royal Thai Armed Forces (RTARF). The program focuses its research on command, control, communications, computers, intelligence, surveillance and reconnaissance (C4ISR) uses for commercial-off-the-shelf (COTS), state-of-the-art, rapidly scaleable airborne and ground communications equipment, including various wireless network technologies. This research is being conducted in partnership with the RTAF to develop a network and associated devices and applications that potentially may help suppress drug trafficking in the northern Thailand border regions. Commensurately, the U.S. Navy is taking the Global War on Terror (GWOT) lead in coalition Maritime Security Operations and riverine warfare operations. With formation of the new Naval Expeditionary Combat Command (NECC), and its new Riverine Warfare Group, the Navyâ s role takes effect starting in January 2007, and could benefit from this research. This thesis focuses on testing and evaluating the overall performance of the MeshDynamics Multiple-Radio Mesh Modules, operating in the 802.11 wireless frequency spectrum. These modules are key building blocks of meshed networks that provide coverage over an area where riverine and coastal operations are being conducted. The network provides an information source and communications backbone for maritime, ground, and air assets. / US Navy (USN) author.