Keiji Hayashi

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External beam radiotherapy is a potential salvage or adjuvant therapy after radical prostatectomy (RP). The purpose of this study was to investigate the treatment outcome of salvage radiotherapy (RT) following RP for clinically localized prostate cancer and to identify factors that may predict the outcome of salvage RT. Between 2000 and 2006, 41 patients(More)
BACKGROUND survivors of non-Hodgkin's lymphoma (NHL) are well known to be at an increased risk of second malignancies. In this study, we evaluated the incidence and clinical features of head and neck cancer (HNC) occurring after radiotherapy (RT) for NHL. MATERIALS AND METHODS We investigated the clinical records of 322 patients who had received RT for(More)
Descriptive observational studies showed upward jumps in secular European perinatal mortality trends after Chernobyl. The question arises whether the Fukushima nuclear power plant accident entailed similar phenomena in Japan. For 47 prefectures representing 15.2 million births from 2001 to 2014, the Japanese government provides monthly statistics on 69,171(More)
In humans, hyperthermia leads to activation of a set of thermoregulatory responses that includes cutaneous vasodilation and sweating. Hyperthermia also increases ventilation in humans, as is observed in panting dogs, but the physiological significance and characteristics of the hyperventilatory response in humans remain unclear. The relative contribution of(More)
Brachytherapy using (198)Au grains is minimally invasive and the only curative treatment for early tongue cancer in patients of advanced age or poor performance status available in our institution. From March 1993 to February 2008, (198)Au grains were used to treat a group of 96 Stage I-II tongue cancer patients who could not undergo surgery or(More)
Based on molecular dynamics search for laws of wearless friction accompanying steady sliding motion between mesoscopic crystal lattices, we have been developing " Phonon-Band Engineering " approaches [1] to design arti…cial materials of desired tribological characteristics for nano-electromechanical systems (NEMS) by utilizing the up-to-date(More)
  • Keiji Hayashi, Tomoki Maruyama, Kazuho Toyoda, Daiki Shirayama, Daisuke Tanaka
  • 2010
In order to develop methods of designing arti…cial materials of desired tribological characteristics for nano-electromechanical systems (NEMS), a better atomistic understanding of wearless-frictional characteristics of meso-scopic solid materials is indispensable. We have searched for laws of wear-less friction accompanying steady sliding motion between(More)