It was by way of total synthesis that the issues concerning the stereostructure of leiodermatolide (1) have recently been solved; with the target now being unambiguously defined, the mission of synthesis changes as to secure a meaningful supply of this exceedingly scarce natural product derived from a deep-sea sponge. To this end, a scalable route of 19 steps (longest linear sequence) has been ...

During the past two decades, impact evaluation and multidimensional poverty measurement have gained increasing relevance in development practice research. The objective of this paper is to prop...

I/O parallelism appears to be a promising approach to achieving high performance in parallel database systems. In such systems, it is essential to decluster database les into fragments and spread them across multiple disks so that the DBMS software can exploit the I/O bandwidth reading and writing the disks in parallel. In this paper, we consider the problem of declustering multidimensional dat...

Motivation: In prostate brachytherapy, intra-operative dosimetry would be ideal to allow for rapid evaluation of the implant quality while the patient is still in the treatment position. Such a mechanism, however, requires 3-D visualization of the currently deposited seeds relative to the prostate. Thus, accurate, robust, and fully-automatic seed segmentation is of critical importance in achiev...

Declustering problems are well-known in the databases for parallel computing environments. In this paper, we propose a new similarity-based technique for declustering data. The proposed method can adapt to the available information about query distribution (e.g. size, shape and frequency) and can work with alternative atomic data-types. Furthermore, the proposed method is exible and can work wi...

The declustering problem is to allocate given data on parallel working storage devices in such a manner that typical requests find their data evenly distributed on the devices. Using deep results from discrepancy theory, we improve previous work of several authors concerning range queries to higher-dimensional data. We give a declustering scheme with an additive error of Od(log d−1 M) independe...

Recently, global environmental studies have become very important around the world. Repeated observations of wide areas of the earth at the same time makes satellite images useful. For understanding earth’s environment it is necessary to use a substantial amount of the temporally sequenced satellite images. At the Institute of Industrial Science, University of Tokyo, we have been building a glo...

Mobility fluctuations have been observed to influence 1/f noise in mesoscopic two-dimensional conductors recent experiments. If such mobility can be assigned clustering/declustering of defects/impurities, the second spectrum should also display character. In this work, we investigate due mobile impurities on a lattice both using kinetic Monte Carlo simulations (periodic boundary conditions eith...