Takeshi Yamaguchi

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In ubiquitous networks, Mobile Nodes (MNs) may often suffer from performance degradation due to the following two reasons: (1) reduction of signal strength by an MN's movement and intervening objects , and (2) radio interference with other WLANs. Therefore, quick and reliable detection of the deterioration of a wireless link condition is essential for(More)
The Purkinje fibers are located in the ventricular walls of the heart, just beneath the endocardium and conduct excitation from the right and left bundle branches to the ventricular myocardium. Recently, anatomists succeeded in photographing the Purkinje fibers of a sheep, which clearly showed the mesh structure of the Purkinje fibers. In this study, we(More)
We aimed to determine whether inclination angles of the line connecting the whole body center of mass (COM) to the center of pressure (COP) (COM-COP angle) help predict the required coefficient of friction (RCOF) in young adult males during the weight acceptance and push-off phases in transient movements such as turning, gait termination and initiation, and(More)
The present study examined whether turning increases the risk of falling because of an induced slip. Fifteen healthy adult male participants were instructed to walk in a straight line and turn 30°, 45°, and 60° to the right with the left and right feet on a stainless steel floor covered with 70 wt% glycerol solution. The frequency of trials in which falls(More)
BACKGROUND RNAs for embryo patterning and for germ cell specification are localized to the vegetal cortex of the oocyte of Xenopus laevis. In oocytes of the direct developing frog Eleutherodactylus coqui, orthologous RNAs for patterning are not localized, raising the question as to whether RNAs and other components of germ plasm are localized in this(More)
Purkinje fibers in mammalian hearts are known to comprise the following three groups depending on their structure: group I found commonly in ungulates, group II in humans, monkeys and dogs, and group III in rodents. The aim of the present study was to document precisely the cytoarchitecture of a network of Purkinje fibers in different species by light and(More)
  • Olivia S Mitchell, Gary Mottola, Stephen Utkus, Takeshi Yamaguchi, Gary R Mottola, Stephen P +3 others
  • 2014
The introduction of lifecycle funds into 401(k) plans offers a rich environment in which to assess workers' portfolio allocation decisions. Consistent with behavioral models, employer design decisions strongly influence lifecycle adoption behavior while fundamentally altering portfolio characteristics, both in the cross-section and longitudinally. Yet there(More)