Yusuke Oya

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Let q be a prime or a prime power ≥ 3. The purpose of this paper is to give a necessary and sufficient condition for the existence of an (n, r)-arc in PG(2, q) for given integers n, r and q using the geometric structure of points and lines in PG(2, q) for n > r ≥ 3. Using the geometric method and a computer, it is shown that there exists no (34, 3) arc in(More)
Inadequate control of blood pressure during antihypertensive treatment remains a major problem in preventive cardiovascular and renal disease. Major causes of resistant hypertension are following: problems in measuring technique, presence of white coat effect, poor adherence of patient, obesity, excessive alcohol intake, sleeping apnea syndrome, excess of(More)
The histologic study on chronological changes of human mandible was performed using 35 postnatal cases. The changes of bone density were divided into following 2 stages. In cases of a 11 hours new born to 2 months (No. 13) baby, the bone density consisted of rather moderate parts that low. In cases of 2 months (No. 14) baby to 66 years adult, it consisted(More)
A 76-year-old man with left internal carotid artery occlusion developed a progressing right hemiparesis. Brain MRI presented reinfarctions in the left anterior border zone and terminal zone in the left deep white matter. Ambulatory blood pressure monitoring showed a decrease in systolic blood pressure by more than 20 mmHg one hour after starting meals,(More)
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