11 research outputs found
Actas del XXIV Workshop de Investigadores en Ciencias de la Computaci贸n: WICC 2022
Compilaci贸n de las ponencias presentadas en el XXIV Workshop de Investigadores en Ciencias de la Computaci贸n (WICC), llevado a cabo en Mendoza en abril de 2022.Red de Universidades con Carreras en Inform谩tic
Cryogenic Control Beyond 100 Qubits
Quantum computation has been a major focus of research in the past two decades, with recent experiments demonstrating basic algorithms on small numbers of qubits. A large-scale universal quantum computer would have a profound impact on science and technology, providing a solution to several problems intractable for classical computers. To realise such a machine, today's small experiments must be scaled up, and a system must be built which provides control and measurement of many hundreds of qubits. A device of this scale is challenging: qubits are highly sensitive to their environment, and sophisticated isolation techniques are required to preserve the qubits' fragile states. Solid-state qubits require deep-cryogenic cooling to suppress thermal excitations. Yet current state-of-the-art experiments use room-temperature electronics which are electrically connected to the qubits. This thesis investigates various scalable technologies and techniques which can be used to control quantum systems. With the requirements for semiconductor spin-qubits in mind, several custom electronic systems, to provide quantum control from deep cryogenic temperatures, are designed and measured. A system architecture is proposed for quantum control, providing a scalable approach to executing quantum algorithms on a large number of qubits. Control of a gallium arsenide qubit is demonstrated using a cryogenically operated FPGA driving custom gallium arsenide switches. The cryogenic performance of a commercial FPGA is measured, as the main logic processor in a cryogenic quantum control system, and digital-to-analog converters are analysed during cryogenic operation. Recent work towards a 100-qubit cryogenic control system is shown, including the design of interconnect solutions and multiplexing circuitry. With qubit fidelity over the fault-tolerant threshold for certain error correcting codes, accompanying control platforms will play a key role in the development of a scalable quantum machine
Artech 2008: proceedings of the 4th International Conference on Digital Arts
ARTECH 2008 is the fourth international conference held in Portugal and Galicia on the topic of Digital Arts. It aims to promote contacts between Iberian and International contributors concerned with the conception, production and dissemination of Digital and Electronic Art. ARTECH brings the scientific, technological and artistic community together, promoting the interest in the digital culture and its intersection with art and technology as an important research field, a common space for discussion, an exchange of experiences, a forum for emerging digital artists and a way of understanding and appreciating new forms of cultural expression. Hosted by the Portuguese Catholic University鈥檚 School of Arts (UCP-EA) at the City of Porto, ARTCH 2008 falls in alignment with the main commitment of the Research Center for Science and Technology of the Arts (CITAR) to promote knowledge in the field of the Arts trough research and development within UCP-AE and together with the local and international community. The main areas proposed for the conference were related with sound, image, video, music, multimedia and other new media related topics, in the context of emerging practice of artistic creation. Although non exclusive, the main topics of the conference are usually: Art and Science; Audio-Visual and Multimedia Design; Creativity Theory; Electronic Music; Generative and Algorithmic Art; Interactive Systems for Artistic Applications; Media Art history; Mobile Multimedia; Net Art and Digital Culture; New Experiences with New Media and New Applications; Tangible and Gesture Interfaces; Technology in Art Education; Virtual Reality and Augmented Reality. The contribution from the international community was extremely gratifying, resulting in the submission of 79 original works (Long Papers, Short Papers and installation proposals) from 22 Countries. Our Scientific Committee reviewed these submissions thoroughly resulting in a 73% acceptance ratio of a diverse and promising body of work presented in this book of proceedings. This compilation of articles provides an overview of the state of the art as well as a glimpse of new tendencies in the field of Digital Arts, with special emphasis in the topics: Sound and Music Computing; Technology Mediated Dance; Collaborative Art Performance; Digital Narratives; Media Art and Creativity Theory; Interactive Art; Audiovisual and Multimedia Design.info:eu-repo/semantics/publishedVersio
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NBS monograph
From Introduction: "This is the second in a series of reports concerned with research and development requirements and areas of continuing concern in the computer and information sciences and technologies.
An Investigation into The Development of an Electrically Assisted Turbocharger with Energy Recovery
An experimental electrically boosted turbocharger system has been developed for a small motorcycle engine intended for use in Formula Student competitions. The system was developed and tested to produce elevated levels of torque at low engine speeds through the use of computer simulations validated by dynamometer testing.
This research took a standard inline two-cylinder engine with a displacement of 471cc and improved its torque output throughout the speed range. The engine was considered as originally designed, in a naturally aspirated state, then modified to be turbocharged, both the NA and the turbocharged engine being simulated and tested. There was less than 5% error between the simulation and test, therefore the simulation was considered suitable as a basis for further development and the turbocharger was modified to accommodate for a 9kW electric motor.
Results from the simulation show that there is a 25% increase in torque at engine idle for the electrically boosted turbo system. Furthermore, the electro-turbocharger engine starts to produce boost pressure at 5500rpm, with the system producing 0.19 bar of gauge boost pressure at engine idle. The same amount of pressure is not produced by the standard turbocharged engine until 6800rpm. The electrically boosted turbocharger system was used to overcome design issues such as turbo-lag and torque levelling. The optimised design demonstrates significant improvements in engine torque and driveability
Flight Mechanics/Estimation Theory Symposium
Satellite attitude determination and control, orbit determination, and onboard and ground attitude determination procedures are among the topics discussed. Other topics covered include: effect of atmosphere on Venus orbiter navigation; satellite-to-satellite tracking; and satellite onboard navigation using global positioning system data