Hiroshi Imai – författare

Cosmic masers have been employed as unique probes of various astronomical objects and environments, ranging from newly born stars and evolved stars, the interstellar medium to active galactic nuclei. The maser scientific community is diverse and multidisciplinary but has long been tied together through the common background of physics and observational techniques. Time-domain studies from daily to decade-long monitoring of maser sources are also in progress with various telescopes from many different research teams in the world. Multiwavelength studies on maser sources have also proliferated, involving strong synergies with large facilities such as ALMA, JVLA, Gaia, and various VLBI networks. This volume gives a comprehensive, up-to-date review of cosmic masers as presented at IAU Symposium 380, the sixth international maser symposium. It also describes intensive discussion about ongoing and future projects relevant to maser science, such as global and new regional VLBI networks, SKA, and ngVLA.

Recently, the field of quantum computation and information has been developing through a fusion of results from various research fields in theoretical and practical areas. This book consists of the reviews of selected topics charterized by great progress and cover the field from theoretical areas to experimental ones. It contains fundamental areas, quantum query complexity, quantum statistical inference, quantum cloning, quantum entanglement, additivity. It treats three types of quantum security system, quantum public key cryptography, quantum key distribution, and quantum steganography. A photonic system is highlighted for the realization of quantum information processing.

This is the proceedings of the SIGAL International Symposium on Algorithms held at CSK Information Education Center, Tokyo, Japan, August 16-18, 1990. SIGAL (Special Interest Group on Algorithms) was organized within the Information Processing Society of Japan in 1988 to encourage research in the field of discrete algorithms, and held 6-8 research meetings each year. This symposium is the first international symposium organized by SIGAL. In response to the call for papers, 88 papers were submitted from around the world. The program committee selected 34 for presentation at the symposium. The symposium also included 5 invited lectures and 10 invited presentations. The subjects of the papers range widely in the field of discrete algorithms in theoretical computer science. Keywords for these subjects are: computational geometry, graph algorithms, complexity theory, parallel algorithms, distributed computing, and computational algebra.

The 42 revised full papers presented were selected from a total of 98 submissions. The scope of the volume spans the whole area of algorithms from discrete mathematics and complexity theory to algorithms design and evaluation in a variety of applicational areas. Among the topics addressed are scheduling and logistics, networking and routing, combinatorial optimization, graph-computations, algorithmic learning, computational geometry, etc.

This book constitutes the refereed proceedings of the 5th Annual International Conference on Computing and Combinatorics, COCOON'99, held in Tokyo, Japan in July 1999. The 46 revised papers presented were carefully reviewed and selected from a total of 88 submissions; also included are two invited survey papers. The papers are organized in topical sections on data structures, computational biology, graph drawing, discrete mathematics, graph algorithms, automata and languages, complexity theory and learning, combinatorial optimization, number theory, distributed computing, network routing, computational geometry, online algorithms, rewriting systems, and parallel computing.