Departments View all

Total Impact Points

Recent Publications View all

  • [Show abstract] [Hide abstract]
    ABSTRACT: Li2CuO2 substituted by various cations, such as Co, Ni, Fe, Mn, and Ti, was examined to decrease the irreversible capacity of unsubstituted one. Among several kinds of cations tested, Ni and Co were found to be effective in improving the irreversible capacity. Li2Cu0.7Ni0.3O2 exhibited a reversible capacity of about 150 mAh/g, while the unsubstituted one exhibited a capacity of only about 100 mAh/g. The structural changes in the Cu-based oxides that occurred during the electrochemical reaction were investigated with ex-situ XRD measurements. The results indicated that the structural transformation behavior changed as a result of the cation substitution.
    No preview · Article · Sep 2014 · Solid State Ionics
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: Endoscopic papillary large-balloon dilation (EPLBD) became popular for the treatment of large common bile-duct stones (CBDS), and its feasibility has been reported in comparison to endoscopic sphincterotomy. However, the comparison between EPLBD and endoscopic papillary regular-balloon dilation (EPBD) has not been reported. In the present study, the efficacy and complications of EPLBD were compared with those of EPBD. We retrospectively assessed 334 consecutive patients with CBDS of any size that were treated by either EPLBD or EPBD between January 2008 and December 2012. In cases with large CBDS (>10 mm), EPLBD and EPBD had similar results in terms of the success rate of stone removal in the first (65% vs. 84%) and total attempts (100% vs. 95%), use of mechanical lithotripter (64% vs. 80%), and procedure time (48.0 ± 17.8 min vs. 44.1 ± 17.1 min). The necessity for crushing stones with a mechanical lithotripter was significantly decreased in EPLBD compared to EPBD (25% vs. 80%). In all cases with CBDS, there was no significant difference in complication rates between EPLBD and EPBD (3.3% vs. 4.7%). Compared to EPBD, EPLBD appears safe and effective for removing large CBDS and decreases the necessity of lithotripsy.
    Preview · Article · Jun 2014 · Journal of Hepato-Biliary-Pancreatic Sciences
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: Because every spike of a neuron is determined by input signals, a train of spikes may contain information about the dynamics of unobserved neurons. A state-space method based on the leaky integrate-and-fire model, describing neuronal transformation from input signals to a spike train has been proposed for tracking input parameters represented by their mean and fluctuation [11]. In the present paper, we propose to make the estimation more realistic by adopting an LIF model augmented with an adaptive moving threshold. Moreover, because the direct state-space method is computationally infeasible for a data set comprising thousands of spikes, we further develop a practical method for transforming instantaneous firing characteristics back to input parameters. The instantaneous firing characteristics, represented by the firing rate and non-Poisson irregularity, can be estimated using a computationally feasible algorithm. We applied our proposed methods to synthetic data to clarify that they perform well.
    Full-text · Article · Feb 2014 · Mathematical Biosciences and Engineering


  • Address
    Tokyo, Japan
Information provided on this web page is aggregated encyclopedic and bibliographical information relating to the named institution. Information provided is not approved by the institution itself. The institution’s logo (and/or other graphical identification, such as a coat of arms) is used only to identify the institution in a nominal way. Under certain jurisdictions it may be property of the institution.

249 Members View all

View all

Top publications last week by reads

RFID Systems: Research Trends and Challenges 07/2010: pages 447 - 471; ISBN: 9780470665251
18 Reads
IEICE Electronics Express 10/2008; DOI:10.2201/NiiPi.2011.8.6
12 Reads

Top Collaborating Institutions


This map visualizes which other institutions researchers from Nippon Telegraph and Telephone have collaborated with.

Rg score distribution

See how the RG Scores of researchers from Nippon Telegraph and Telephone are distributed.