Tatsuya Yamanaka

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An improved topology for dc-dc converters used in hybrid power source systems, which consist of a fuel cell (FC) and electric double-layer capacitors (EDLCs), is proposed. The new topology has three(More)
The polymer electrolyte membrane fuel cell (PEMFC) has a potential to be an alternative power source for smartphones and other mobile electronic applications. However, PEMFCs cannot quickly response(More)
A 63-year-old woman was admitted to our hospital with a 1-month history of visual field defect and reduced bilateral visual acuity. Neurological examination revealed enlargement of bilateral central(More)
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