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Global warming is widely considered to be one of the most serious environmental problems for current and future generations.
This textbook reviews the novel techniques employed in corneal transplantation. It will assist fellows and corneal surgeons in using these techniques to best effect and in selecting patients for surgical procedures, taking into account the benefits and risks. Until 15 years ago the state-of-the art type of corneal transplantation was penetrating keratoplasty. Since the start of this millennium, however, important advances have been made in developing new surgical techniques. Today, the vast majority of keratoplasty procedures are performed as delicate lamellar procedures, either with the assistance of fine microkeratomes or femtosecond lasers or using very advanced surgical dissection procedures. Corneal Transplantation provides detailed information on these and other advances, which have helped patients undergoing keratoplasty to achieve a much faster visual recovery and a more stable eye with less risk of rejection episodes.
This volume, the fourteenth in the Space Sciences Series of ISS/, is dedicated to the matter in the universe, which was the topic of a workshop organized by ISSI from 19 to 22 March 2001 in Bern. The aim of the meeting was to gather ac tive researchers from various fields (cosmology, astrophysics, nuclear and particle physics as well as space science) to asses the exciting new developments in the search for abundant and yet unknown forms of matter in the universe. Due to the importance of the field and the rapid developments which are taking place ISSI decided to organize a workshop on matter in the universe and invited nine convenors, John Ellis, Johannes Geiss, Philippe Jetzer, Heinrich Le...
Advances in Atomic and Molecular Physics
ROSAT Observations G. HASINGER Max-Planck-Institut flir extraterrestrische Physik, D-85740 Garching, Germany Abstract. This review describes the most recent advances in the study of the extragalactic soft X-ray background and what we can learn about its constituents. The deepest pointed observations with the ROSAT PSPC are discussed. The logN-logS relation is presented, which reaches to the faintest X-ray fluxes and to the highest AGN surface densities ever achieved. The N(>S) relation shows a 2 density in excess of 400 deg- at the faintest fluxes and a flattening below the Einstein Deep Survey limit. About 60% of the extragalactic background has been resolved in the deepest field. Detailed ...
This book synthesises several studies on the potential global impacts of two fundamental international policy initiatives: (i) multilateral agreements on climate protection strategies and (ii) trade agreements towards global trade liberalisation. Although these initiatives are not directly linked, they interrelate in subtle, yet important ways. Based on theoretical analyses and numerical simulations, the book provides guidelines on efficient strategies for climate change mitigation, implementing the framework of the Kyoto Protocol and the provided flexibility instruments, hereby accounting for interrelationships with existing and possible trade agreements on various levels. The analyses incorporate important real-world features, such as imperfect market structures, trade liberalisation settings, risk or transaction costs, that may substantially influence the magnitude and even the sign of policy impacts.
The NATO Advanced Study Institute "Cosmological Aspects of X-Ray Clus ters of Galaxies" took place in Vel en , Westphalia, Germany, from June 6 to June 18, 1993. It addressed the fruitful union of two topics, cosmology and X-ray clus ters, both of which carry substantial scientific weight at the beginning of the last decenium of the last century in the second millenium of our era. The so far largest X-ray "All-Sky Survey", observed by the ROSAT X-ray satel lite, and ROSAT's deep pointed observations, have considerably enlarged the base of X-ray astronomy, particularly concerning extragalactic sources. Cosmology has gained significant impetus from the large optical direct and spectroscopic su...
This book offers eleven coordinated reviews on multi-scale structure formation in cosmic plasmas in the Universe. Observations and theories of plasma structures are presented in all relevant astrophysical contexts, from the Earth’s magnetosphere through heliospheric and galactic scales to clusters of galaxies and the large scale structure of the Universe. Basic processes in cosmic plasmas starting from electric currents and the helicity concept governing the dynamics of magnetic structures in planet magnetospheres, stellar winds, and relativistic plasma outflows like pulsar wind nebulae and Active Galactic Nuclei jets are covered. The multi-wavelength view from the radio to gamma-rays with modern high resolution telescopes discussed in the book reveals a beautiful and highly informative picture of both coherent and chaotic plasma structures tightly connected by strong mutual influence. The authors are all leading scientists in their fields, making this book an authoritative, up‐to‐date and enduring contribution to astrophysics.
A complete overview of the different methods of preparing and studying self-assembled structures at surfaces and interfaces.