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Author: Tiffany Elsass
Publisher:
ISBN:
Category :
Languages : fr
Pages : 133
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Book Description
Ce travail de thèse porte sur l'étude expérimentale de l'auto-organisation optique transverse dans des lasers à grand nombre de Fresnel contenant un absorbant saturable. En présence de bistabilité et d'instabilité de modulation, des structures localisées apparaissent, appelées solitons de cavité. Elles résultent d'un équilibre entre diffraction et auto-focalisation dans un milieu non-linéaire. En régime laser, ces systèmes peuvent ainsi émettre plusieurs faisceaux d'une dizaine de microns de diamètre seulement. Chaque faisceau constitue une structure localisée dans le plan transverse, qui peut être allumée, éteinte et déplacée à volonté. Ces travaux de thèse se divisent en deux parties : l'étude du régime continu et celle des régimes impulsionnels. Dans ce deuxième cas, le laser peut émettre des balles de lumière en cavité localisées à la fois dans l'espace et dans le temps. Ces travaux sont axés sur la recherche et l'étude des différentes propriétés nécessaires à l'apparition de structures localisées bistables et impulsionnelles afin de les réunir. Les résultats présentés dans ce manuscrit montrent pour la première fois, dans une structure monolithique VCSEL avec absorbant saturable intégré, un processus d'écriture-effacement d'une structure localisée en régime continu. De plus, ils montrent les étapes réalisées afin de se rapprocher du même résultat dans le régime impulsionnel : un agrégat de structures localisées impulsionnelles a ainsi pu être écrit et effacé. De par la compacité des systèmes VCSEL et la reconfigurabilité des solitons de cavité, ces résultats constituent une étape supplémentaire vers la réalisation d'un traitement tout-optique de l'information.
Author: Tiffany Elsass
Publisher:
ISBN:
Category :
Languages : fr
Pages : 133
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Book Description
Ce travail de thèse porte sur l'étude expérimentale de l'auto-organisation optique transverse dans des lasers à grand nombre de Fresnel contenant un absorbant saturable. En présence de bistabilité et d'instabilité de modulation, des structures localisées apparaissent, appelées solitons de cavité. Elles résultent d'un équilibre entre diffraction et auto-focalisation dans un milieu non-linéaire. En régime laser, ces systèmes peuvent ainsi émettre plusieurs faisceaux d'une dizaine de microns de diamètre seulement. Chaque faisceau constitue une structure localisée dans le plan transverse, qui peut être allumée, éteinte et déplacée à volonté. Ces travaux de thèse se divisent en deux parties : l'étude du régime continu et celle des régimes impulsionnels. Dans ce deuxième cas, le laser peut émettre des balles de lumière en cavité localisées à la fois dans l'espace et dans le temps. Ces travaux sont axés sur la recherche et l'étude des différentes propriétés nécessaires à l'apparition de structures localisées bistables et impulsionnelles afin de les réunir. Les résultats présentés dans ce manuscrit montrent pour la première fois, dans une structure monolithique VCSEL avec absorbant saturable intégré, un processus d'écriture-effacement d'une structure localisée en régime continu. De plus, ils montrent les étapes réalisées afin de se rapprocher du même résultat dans le régime impulsionnel : un agrégat de structures localisées impulsionnelles a ainsi pu être écrit et effacé. De par la compacité des systèmes VCSEL et la reconfigurabilité des solitons de cavité, ces résultats constituent une étape supplémentaire vers la réalisation d'un traitement tout-optique de l'information.
Author: Neville Agnew
Publisher: Getty Publications
ISBN: 1606061577
Category : Art
Languages : en
Pages : 476
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Book Description
The Mogao Grottoes, a World Heritage Site in northwestern China, are located along the ancient caravan routes—collectively known as the Silk Road—that once linked China with the West. Founded by a Buddhist monk in the late fourth century, Mogao flourished over the following millennium, as monks, local rulers, and travelers commissioned hundreds of cave temples cut into a mile-long rock cliff and adorned them with vibrant murals. More than 490 decorated grottoes remain, containing thousands of sculptures and some 45,000 square meters of wall paintings, making Mogao one of the world’s most significant sites of Buddhist art. In 1997 the Getty Conservation Institute, which had been working with the Dunhuang Academy since 1989, began a case study using the Late–Tang dynasty Cave 85 to develop a methodology that would stabilize the deteriorating wall paintings. This abundantly illustrated volume is the definitive report on the project, which was completed in 2010.
Author: Gregory Jerkiewicz
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 378
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Book Description
The wide scope covered by the 23 papers makes the collection suitable as a survey of current developments in the subject, for specialists in electrochemical surface science, newcomers to the field, or scientists working in related disciplines. The topics include computer simulation of the structure and dynamics of water near metal surfaces, the growth kinetics of phosphate films on metal oxide surfaces, anion adsorption and charge transfer on single-crystal electrodes, an electrochemical and in-situ scanning-probe microscopic study of electroactive polymers, and the temperature dependence of the growth of surface oxide films on rhodium electrodes. Annotation copyrighted by Book News, Inc., Portland, OR.
Author: Ubaidillah Sabino
Publisher: Springer Nature
ISBN: 9811544816
Category : Technology & Engineering
Languages : en
Pages : 813
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Book Description
This book gathers the proceedings of the 6th International Conference and Exhibition on Sustainable Energy and Advanced Materials (ICE-SEAM 2019), held on 16–17 October 2019 in Surakarta, Indonesia. It focuses on two relatively broad areas – advanced materials and sustainable energy – and a diverse range of subtopics: Advanced Materials and Related Technologies: Liquid Crystals, Semiconductors, Superconductors, Optics, Lasers, Sensors, Mesoporous Materials, Nanomaterials, Smart Ferrous Materials, Amorphous Materials, Crystalline Materials, Biomaterials, Metamaterials, Composites, Polymers, Design, Analysis, Development, Manufacturing, Processing and Testing for Advanced Materials. Sustainable Energy and Related Technologies: Energy Management, Storage, Conservation, Industrial Energy Efficiency, Energy-Efficient Buildings, Energy-Efficient Traffic Systems, Energy Distribution, Energy Modeling, Hybrid and Integrated Energy Systems, Fossil Energy, Nuclear Energy, Bioenergy, Biogas, Biomass Geothermal Power, Non-Fossil Energies, Wind Energy, Hydropower, Solar Photovoltaic, Fuel Cells, Electrification, and Electrical Power Systems and Controls.
Author: Huifang Chen
Publisher:
ISBN: 9781536127737
Category : Surgery, Experimental
Languages : en
Pages : 0
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Book Description
Experimental surgery is an important link for the development in clinical surgery, research and teaching. Experimental surgery was part of the most important surgical discoveries in the past century. Since 1901 nine Nobel Prizes have been awarded to the pioneers had remarkable achievements in the basic or practical surgery. In recent 20 years, experimental surgery has achieved new advances, like laparoscopic and robotic surgery, tissue engineering, and gene therapy which are widely applied in clinic surgery. The present book covers wide experimental surgery in preclinical research models subdivided in two volumes. Volume I introduces surgical basic notions, techniques, and different surgical models involved in basic experimental surgery and review the biomechanical models, ischemia/reperfusion injury models, repair and regeneration models, and organ and tissue transplantation models, respectively. Volume II introduces several specific experimental models such as laparoscopic and bariatric experimental surgical models. The second volume also introduces graft-versus-host disease, and other experimental models. Review the advances and development of recent techniques such as tissue engineering, organ preservation, wound healing and scarring, gene therapy and robotic surgery. The book documents the enormous volume of knowledge we have acquired in the field of experimental surgery. In this book, we have invited experts from the United States, Canada, France, Germany, China, Japan, Korea, UK, Sweden, Netherland, Hungary and Turkey to contribute 36 chapters in the fields of their expertise. These two volumes are the compilation of basic experimental surgery and updated advances of new development in this field that will be invaluable to surgeons, residents, graduate students, surgical researchers, physicians, immunologists, veterinarians and nurses in surgery.
Author: Tony Giampaolo
Publisher: The Fairmont Press, Inc.
ISBN: 0881734136
Category : Gas-turbines
Languages : en
Pages : 426
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Book Description
The second edition of a bestseller, this comprehensive reference provides the fundamental information required to understand both the operation and proper application of all types of gas turbines. The completely updated second edition adds a new section on use of inlet cooling for power augmentation and NOx control. It explores the full spectrum of gas turbines hardware, typical application scenarios, and operating parameters, controls, inlet treatments, inspection, trouble-shooting, and more. The author discusses strategies that can help readers avoid problems before they occur and provides tips that enable diagnosis of problems in their early stages and analysis of failures to prevent their recurrence.
Author: Florence Essers
Publisher:
ISBN:
Category : Inventions
Languages : en
Pages : 214
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Book Description
Author: Zeki Berk
Publisher: Academic Press
ISBN: 0124159869
Category : Technology & Engineering
Languages : en
Pages : 721
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Book Description
The past 30 years have seen the establishment of food engineering both as an academic discipline and as a profession. Combining scientific depth with practical usefulness, this book serves as a tool for graduate students as well as practicing food engineers, technologists and researchers looking for the latest information on transformation and preservation processes as well as process control and plant hygiene topics. - Strong emphasis on the relationship between engineering and product quality/safety - Links theory and practice - Considers topics in light of factors such as cost and environmental issues
Author: Tom Standage
Publisher: John Wiley & Sons
ISBN: 9781861979711
Category : Business & Economics
Languages : en
Pages : 372
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Book Description
From the industrial revolution to the railway age, through the era of electrification, the advent of mass production, and finally to the information age, the same pattern keeps repeating itself. An exciting, vibrant phase of innovation and financial speculation is followed by a crash, after which begins a longer, more stately period during which the technology is actually deployed properly. This collection of surveys and articles from The Economist examines how far technology has come and where it is heading. Part one looks at topics such as the “greying” (maturing) of IT, the growing importance of security, the rise of outsourcing, and the challenge of complexity, all of which have more to do with implementation than innovation. Part two looks at the shift from corporate computing towards consumer technology, whereby new technologies now appear first in consumer gadgets such as mobile phones. Topics covered will include the emergence of the mobile phone as the “digital Swiss Army knife”; the rise of digital cameras, which now outsell film-based ones; the growing size and importance of the games industry and its ever-closer links with other more traditional parts of the entertainment industry; and the social impact of technologies such as text messaging, Wi-Fi, and camera phones. Part three considers which technology will lead the next great phase of technological disruption and focuses on biotechnology, energy technology, and nanotechnology.
Author: Michael F. Hordeski
Publisher: The Fairmont Press, Inc.
ISBN: 0881733997
Category : Technology & Engineering
Languages : en
Pages : 398
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Book Description
1-Heat, Ventilation and Damper Control Trends2-Energy and Power Management, Distributed Control Trends3-Control Technology, Microelectronics and Nanotechnology4-Advance HVAC Control, Information Technology and Open Systems5-PC-based Control, Software and Bus Trends6-Artificial Intelligence, Fuzzy Logic and Control7-Computer Networks and Security8-Systems and Device Networks9-Building automation, Wireless Technology and the InternetIndex
