Masayuki Murata

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To verify the validity of our previously reported autonomous indoor localization system in an actual environment, we implemented it in a wireless sensor network based on the ZigBee standard. The system automatically estimates the distance between sensor nodes by measuring the RSSI (received signal strength indicator) at an appropriate number of sensor(More)
Analysis and Modeling of World Wide Web Traffic by Ghaleb Abdulla Doctor of Philosophy in Computer Science and Applications Virginia Polytechnic Institute and State University, 1998 Professor Edward A. Fox, Chair This dissertation deals with monitoring, collecting, analyzing, and modeling of World Wide Web (WWW) traffic and client interactions. The rapid(More)
Several gateway-based congestion control mechanisms have been proposed to support an end-to-end congestion control mechanism of TCP (Transmission Control Protocol). One of promising gateway-based congestion control mechanisms is a RED (Random Early Detection) gateway. Although effectiveness of the RED gateway is fully dependent on a choice of control(More)
Congestion control plays an important role in the effective and stable operation of ATM networks. This paper first gives a historical overview of rate-based congestion control algorithms developed in the ATM Forum, showing how the current ATM Forum standard regarding the traffic management control methods is exploited, by these algorithm. Then, analytical(More)
a Faculty of Economics, Osaka University, 1-7, Machikaneyama, Toyonaka, Osaka 560, Japan E-mail: hasegawa@econ.osaka-u.ac.jp b Department of Infomatics and Mathematical Science, Graduate School of Engineering Science, Osaka University, 1-3, Machikaneyama, Toyonaka, Osaka 560-8531, Japan E-mail: murata@ics.es.osaka-u.ac.jp c Department of Infomatics and(More)
During development, cells undergo dynamic morphological changes by rearrangements of the cytoskeleton including microtubules. However, molecular mechanisms underlying the microtubule remodeling between orientated and disoriented formations are almost unknown. Here we found that novel subtypes of collapsin response mediator proteins (CRMP-As) and the(More)
We study routing methods in all–optical switching networks. In all–optical switching networks, the connection with more hops encounters more call blocking, and it is especially true in optical networks with no wavelength conversions. We therefore consider an alternate routing method with limited trunk reservation in which connections with more hops are(More)
At the onset of mitosis, the Golgi apparatus, which consists of several cisternae, disperses throughout the cell to be partitioned into daughter cells. The molecular mechanisms of this process are now beginning to be understood. To investigate the biochemical requirements and kinetics of mitotic Golgi membrane dynamics in polarized cells, we have(More)
NSF and p97 are ATPases required for the heterotypic fusion of transport vesicles with their target membranes and the homotypic fusion of organelles. NSF uses ATP hydrolysis to dissociate NSF/SNAPs/SNAREs complexes, separating the v- and t-SNAREs, which are then primed for subsequent rounds of fusion. In contrast, p97 does not dissociate the p97/p47/SNARE(More)
Currently there are several computer algorithms available for aligning two biological sequences. When more than two sequences are to be aligned, however, pairwise comparisons using these methods rarely lead to a consistent alignment of the sequences. One obvious solution to this problem is to compare all the sequences simultaneously. Here we present an(More)