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Author: Pierre-Alexandre Martin Publisher: ISBN: Category : Languages : fr Pages : 88
Book Description
Les premières études sur les lasers en chirurgie dentaire datent des années 1960 et portaient sur les interactions avec les tissus durs de la dent. Depuis de nombreux lasers ont été proposés sur le marché. La plupart se sont révélés inadaptés à une utilisation en pratique quotidienne car d'indications trop spécifiques et difficiles à mettre en oeuvre. L'objet de ce travail est de présenter simplement les caractéristiques d'un laser, de montrer les paramètres que le praticien peut modifier. Ce sont notamment le niveau d'énergie, la fréquence et la durée du tir ainsi que la densité de puissance (par l'adjonction de burins). La variation de ces paramètres permet de moduler les caractéristiques du rayonnement Laser et donc ses effets sur le tissu vivant. Ces réglages par l'utilisateur permettent ainsi une plus grande polyvalence des indications des lasers modernes, notamment du laser Er-Yag.
Author: Pierre-Alexandre Martin Publisher: ISBN: Category : Languages : fr Pages : 88
Book Description
Les premières études sur les lasers en chirurgie dentaire datent des années 1960 et portaient sur les interactions avec les tissus durs de la dent. Depuis de nombreux lasers ont été proposés sur le marché. La plupart se sont révélés inadaptés à une utilisation en pratique quotidienne car d'indications trop spécifiques et difficiles à mettre en oeuvre. L'objet de ce travail est de présenter simplement les caractéristiques d'un laser, de montrer les paramètres que le praticien peut modifier. Ce sont notamment le niveau d'énergie, la fréquence et la durée du tir ainsi que la densité de puissance (par l'adjonction de burins). La variation de ces paramètres permet de moduler les caractéristiques du rayonnement Laser et donc ses effets sur le tissu vivant. Ces réglages par l'utilisateur permettent ainsi une plus grande polyvalence des indications des lasers modernes, notamment du laser Er-Yag.
Author: Télesphore Sime-Ngando Publisher: Springer ISBN: 3319399616 Category : Science Languages : en Pages : 422
Book Description
This book represents the first multidisciplinary scientific work on a deep volcanic maar lake in comparison with other similar temperate lakes. The syntheses of the main characteristics of Lake Pavin are, for the first time, set in a firmer footing comparative approach, encompassing regional, national, European and international aquatic science contexts. It is a unique lake because of its permanently anoxic monimolimnion, and furthermore, because of its small surface area, its substantially low human influence, and by the fact that it does not have a river inflow. The book reflects the scientific research done on the general limnology, history, origin, volcanology and geological environment as well as on the geochemistry and biogeochemical cycles. Other chapters focus on the biology and microbial ecology whereas the sedimentology and paleolimnology are also given attention. This volume will be of special interest to researchers and advanced students, primarily in the fields of limnology, biogeochemistry, and aquatic ecology.
Author: Koji Sugioka Publisher: Springer ISBN: 3642105238 Category : Science Languages : en Pages : 353
Book Description
Miniaturization and high precision are rapidly becoming a requirement for many industrial processes and products. As a result, there is greater interest in the use of laser microfabrication technology to achieve these goals. This book composed of 16 chapters covers all the topics of laser precision processing from fundamental aspects to industrial applications to both inorganic and biological materials. It reviews the sate of the art of research and technological development in the area of laser processing.
Author: H. Brodowsky Publisher: Springer Science & Business Media ISBN: 9400910274 Category : Technology & Engineering Languages : en Pages : 579
Book Description
The thermochemistry of alloys has interested generations of scientists and the subject was treated in classical textbooks long ago, e.g. by Hume-Rothery, by Wagner, and by Kubaschewski and Alcock. Nevertheless, the appearance of new materials and the desire to improve traditional materials and metallurgical processes has kept up demand for more information on the thermodynamics of these systems. The advent of computing power has created new opportunities to tie various aspects and properties together, such as phase diagrams and thermodynamic functions, that are in principle thermodynamically inter related but were too cumbersome to work out before. The computer has also been a powerful tool in buUding and testing models that help to explain the underlying causes of non-ideal behavior. At the same time, these calculations have pinpointed areas, where additional and more accurate data are needed. In the laboratory, new methods, improved materials, and sophistica ted instrumentation have gradually changed the way in which experiments are done. Within the time span of perhaps thirty years, the development went from jotting down individual readings of data points to strip chart recording to automatic digital data acquisition. Scholars and students active in the field of "Thermochemistry of Alloys" convened for a NATO Advanced Study Institute at Kiel in August 1987 to discuss these developments. This book collects most of the lectures and seminar papers given at the Institute.
Author: Sigmar Bortenschlager Publisher: Springer Science & Business Media ISBN: 3709167582 Category : Social Science Languages : en Pages : 196
Book Description
Before the discovery of the "Man in the Ice" in temporal context. On the other hand the reconstruc tion of the Iceman's life-style as derived from data September 1991, little was known about the Neolithic obtained from the site has to be correlated with inde period in the Central Alps. Suddenly and without precedent, here was the very well preserved corpse of pendent data sets. For that purpose pollen analysis was a man who had lived more than 5,000 years ago with his performed on peat-bogs in the vicinity of the find and clothing and equipment almost intact. The discovery further afield to obtain precise data on the vegetation was not just deservedly a world-wide sensation but a cover and climate in the Neolithic. Pollen analysis was unique opportunity for the scientific community to in performed for a vertical transect extending from the vestigate the life and death of a human from such very timber line almost up to the nival zone. The results of ancient times. It opened up wholly new horizons in the analyses reveal changes to the vegetation patterns prehistoric research, and with the help of a full range caused by pastoral farming long before the time of the of modern research techniques an attempt was made Iceman.
Author: William M. Steen Publisher: Springer Science & Business Media ISBN: 1447137523 Category : Technology & Engineering Languages : en Pages : 416
Book Description
New chapters on bending and cleaning reflect the changes in the field since the last edition, completing the range of practical knowledge about the processes possible with lasers already familiar to users of this well-known text. Professor Steen's lively presentation is supported by a number of original cartoons by Patrick Wright and Noel Ford, which will bring a smile to your face and ease the learning process. From the reviews: "...well organized, and the text is very practical...The engineering community will find this book informative and useful." (OPTICS AND PHOTONICS NEWS, July/August 2005)
Author: A. Tremblay Publisher: Springer Science & Business Media ISBN: 3540266437 Category : Science Languages : en Pages : 743
Book Description
In a time when an unquestionable link between anthropogenic emissions of greenhouse gases and climatic changes has finally been acknowledged and * widely documented through IPCC reports, the need for precise estimates of greenhouse gas (GHG) production rates and emissions from natural as well as managed ecosystems has risen to a critical level. Future agreements between nations concerning the reduction of their GHG emissions will - pend upon precise estimates of the present level of these emissions in both natural and managed terrestrial and aquatic environments. From this viewpoint, the present volume should prove to a benchmark contribution because it provides very carefully assessed values for GHG emissions or exchanges between critical climatic zones in aquatic en- ronments and the atmosphere. It also provides unique information on the biases of different measurement methods that may account for some of the contradictory results that have been published recently in the literature on this subject. Not only has a large array of current measurement methods been tested concurrently here, but a few new approaches have also been developed, notably laser measurements of atmospheric CO concentration 2 gradients. Another highly useful feature of this book is the addition of - nitoring and process studies as well as modeling.
Author: Johan Meyer Publisher: CRC Press ISBN: 1000531961 Category : Technology & Engineering Languages : en Pages : 391
Book Description
Over the past two decades, the use of fiber lasers in engineering applications has gradually become established as an engineering discipline on its own. The development of fiber lasers is mainly the result of studies from various domains like photonics, optical sensing, fiber optics, nonlinear optics, and telecommunication. Though many excellent books exist on each of these subjects, and several have been written specifically to address lasers and fiber lasers, it is still difficult to find one book where the diverse core of subjects that are central to the study of fiber laser systems are presented in simple and straight forward way. Fiber Lasers: Fundamentals with MATLAB Modelling, is an introduction to the fundamentals of fiber lasers. It provides clear explanations of physical concepts supporting the field of fiber lasers. Fiber lasers’ characteristics are analyzed theoretically through simulations derived from numerical models. The authors cover fundamental principles involved in the generation of laser light through both continuous-wave (CW) and pulsing. It also covers experimental configuration and characterization for both CW and Q-switching. The authors describe the simulation of fiber laser systems and propose numerical modelling of various fiber laser schemes. MATLAB® modelling and numerical computational methods are used throughout the book to simulate different fiber laser system configurations. This book will be highly desirable and beneficial for both academics and industry professionals to have ample examples of fiber laser approaches that are well thought out and fully integrated with the subjects covered in the text. This book is written to address these needs.
Author: Pierre-Alexandre Martin
Author: Pierre-Alexandre Martin
Author: 
Author: Télesphore Sime-Ngando
Author: Koji Sugioka
Author: H. Brodowsky
Author: 
Author: Sigmar Bortenschlager
Author: William M. Steen
Author: A. Tremblay
Author: Johan Meyer