Rayons
Langues
Formats
Jer
-
Nanomechanics of Materials and Structures
Tze-Jer Chuang, P. M. Anderson, M.-K. Wu, S. Hsieh
- Springer
- 11 Juillet 2006
- 9781402039515
This book is derived from the proceedings of the International Workshop on Nanomechanics held at Asilomar Conference Grounds in Pacific Grove, California on July 14-17, 2004. Approximately 70 leading experts from academia, government and industrial sectors in semiconductors, computers, communication, information technology, defense, energy, transportation and aerospace attended the Workshop (see the workshop photo taken on July 16, 2004). The main objective was to convene leading researchers in the nanotechnology community to assess the current state-of-the-art and disseminate recent progress, critical issues, barriers to applications, and directions for future research in nanomechanics. Miniaturization of structural components and functional devices such as electronic, optical, mechanical and electric-magnetic parts has been a recent trend, and the pace has accelerated over the past few years. Advances in micromanufacturing, semiconductor processing (e.g., etching, lithography, grafting, etc.), sensors, actuators and microprocessors have opened up a revolutionary path to the development of new technologies such as micro-electro-mechanical systems (MEMS), nano-electro-mechanical systems (NEMS), micro-engines, smart structures, smart controllers, lab-- a-chip devices, and even bio-medical sensing devices which can detect, analyze, decide and activate appropriate functions in real time. The above-mentioned devices, structures, or systems, have one issue in common. In order to perform their assigned functions, they must maintain their structural integrity and be reliable and durable during their entire designed service life. Thus, strength, durability, and time-dependent mechanical property degradation are major concerns for design engineers and device manufacturers, even though the parts are designed for electronic, magnetic, optical or other functions.
-
Map Projections
Erik W. Grafarend, Rey-Jer You, Rainer Syffus
- Springer
- 11 Septembre 2014
- 9783642364945
In the context of Geographical Information Systems (GIS) the book offers a timely review Map Projections. The first chapters are of foundational type. We introduce the mapping from a left Riemann manifold to a right one specified as conformal, equiaerial and equidistant, perspective and geodetic. In particular, the mapping from a Riemann manifold to a Euclidean manifold ("plane") and the design of various coordinate systems are reviewed . A speciality is the treatment of surfaces of Gaussian curvature zero. The largest part is devoted for mapping the sphere and the ellipsoid-of-revolution to tangential plane, cylinder and cone (pseudo-cone) using the polar aspect, transverse as well as oblique aspect. Various Geodetic Mappings as well as the Datum Problem sre reviewed.In the first extension we introduce optimal map projections by variational calculus for the sphere, respectively the ellipsoid generating harmonic maps. The second extension reviews alternative maps for structures , namely torus (pneu), hyperboloid (cooling tower), paraboloid (parabolic mirror), onion shape (church tower) as well as clothoid (Hight Speed Railways) used in Project Surveying. Third, we present the Datum Transformation described by the Conformal Group C10(3) in a threedimensional Euclidean space , a ten parameter conformal transformation. It leaves infinitesimal angles and distance ratios equivariant.Numerical examples from classical and new map projections as well as twelve appendices document the Wonderful World of Map Projections.
-
Charles Richet (1850-1935) ; l'exercice de la curiosité
Van Wijland Jer
- Presses universitaires de rennes
- 22 Octobre 2015
- 9782753548466
En parallèle de son activité de physiologiste, dont les travaux novateurs sur l'anaphylaxie lui ont valu le prix Nobel en 1913, Charles Richet s'est également voulu écrivain, constructeur et propagandiste de l'aéronautique, militant pacifiste, etc. Cet ouvrage procède à l'état de la recherche sur ce savant pluriel et en explorer les multiples facettes, sans esprit apologétique ni polémique, mais avec toute la rigueur qu'impose la recherche universitaire.
