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Search Results: 1 - 10 of 1440 matches for " Kazuo Nakazato "
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An Integrated ISFET Sensor Array
Kazuo Nakazato
Sensors , 2009, DOI: 10.3390/s91108831
Abstract: A monolithically integrated ISFET sensor array and interface circuit are described. A new high-density, low-power source-drain follower was developed for the sensor array. ISFETs were formed by depositing Au/Ti extended-gate electrodes on standard MOSFETs, then thin silicon nitride layers using catalytic chemical vapor deposition and/or SU-8 protective layers were formed on the extended-gate electrodes. Applications for the array include: (1) pH detection by statistical distribution observing time and space fluctuations; (2) DNA detection using thiol-modified or silane-coupled oligonucleotides; (3) bio-image sensing by converting photons to electrons using Photosystem I of Thermosynechococcus elongatus, and sensing the converted electric charges by ISFETs.
Yuji Nakazato
Indian Pacing and Electrophysiology Journal , 2002,
Abstract: Sustained chronic tachyarrhythmias often cause a deterioration of cardiac function known as tachycardia-induced cardiomyopathy or tachycardiomyopathy.1 It has been recognized that the tachycardiomyopathy occurs in experimental models2 and also in patients with supraventricular or ventricular tachycarrhythmias.3,4,5,6 Generally, cardiac function will recover if drug or catheter ablation therapy is successfully performed. Phillips and Levine7 initially presented this concept in 1949 for the relationship between rapid atrial fibrillation and reversible left ventricular (LV) failure. However, it might be difficult to define its cause and effect relationship when cardiomyopathy and tachycardia are identified simultaneously. The reversibility of LV dysfunction may often be variable and the precise mechanisms of the pathophysiological features of this phenomenon should be elucidated. Although excellent and comprehensive review articles by Fenelon G, et al.8 and Shinbane JS et al 9 regarding these topics have already been published, I will firstly present a typical case and then review the basic and clinical characteristics of tachycardiomyopathy in this article.
Analytical Solution to the Fokker-Planck Equation with a Bottomless Action
Hiromichi Nakazato
Physics , 1993, DOI: 10.1016/0370-2693(94)91013-8
Abstract: A new Langevin equation with a field-dependent kernel is proposed to deal with bottomless systems within the framework of the stochastic quantization of Parisi and Wu. The corresponding Fokker-Planck equation is shown to be a diffusion-type equation and is solved analytically. An interesting connection between the solution with the ordinary Feynman measure, which in this case is not normalizable, is clarified.
Time development of a wave packet and the time delay
Hiromichi Nakazato
Physics , 1997, DOI: 10.1007/BF02551447
Abstract: A one-dimensional scattering problem off a $\delta$-shaped potential is solved analytically and the time development of a wave packet is derived from the time-dependent Schr\"odinger equation. The exact and explicit expression of the scattered wave packet supplies us with interesting information about the "time delay" by potential scattering in the asymptotic region. It is demonstrated that a wave packet scattered by a spin-flipping potential can give us quite a different value for the delay times from that obtained without spin-degrees of freedom.
Non-motor signs and symptoms in Parkinson’s disease  [PDF]
Kazuo Abe
Health (Health) , 2012, DOI: 10.4236/health.2012.431171
Abstract: Motor symptoms are cardinal clinical features of Parkinson’s disease (PD). Progress in drug therapy and rehabilitation has been presenting beneficial effect for motor symptoms. However, non-motor symptoms and signs in PD have been accumulated growing attentions and its amelioration may also give beneficial effect for PD patients’ and their care givers’ quality of life. In this mini-review, I overviewed non-motor symptoms and signs in PD.
A Revival of Little Black Sambo in Japan  [PDF]
Kazuo Mori
Advances in Literary Study (ALS) , 2014, DOI: 10.4236/als.2014.21003

In the late 1980s, a popular children’s book “Little Black Sambo”(hereafter,LBS) disappeared from all bookstores in Japan.The book was alleged to have racist characteristics such as the name of the boy, the way the illustrations caricatured blacks, etc. Mori (1997) revised the original story by changing the protagonist from a black boy to a black Labrador puppy, with eliminating the word “Sambo”,which had a historically pejorative connotation in the US. Mori (2005) conducted an experiment to compare the entertainment value of the two versions of LBS using four-year-old children and found no difference. Mori (2005) also casted a suspicion that the real reason why the book was withdrawnin Japan was a matter of piracy rather than racism. All Japanese publishers at that time had not properly obtained the copyright. Nowadays there are several versions of LBS available in bookstores all over Japan.

Getting Rid of the Horizontal-to-Vertical Strategy: A Case Report of a Japanese Research Psychologist  [PDF]
Kazuo Mori
Open Journal of Social Sciences (JSS) , 2014, DOI: 10.4236/jss.2014.24040
Abstract: Most Japanese research psychologists have used “Horizontal-to-Vertical Conversion Strategy” for their research, simply replicating experimental studies published in Western journals with Japanese participants and publishing papers only in Japanese (the traditional orthography of the Japanese language is vertical). This short article criticized this prevailing research strategy among Japanese psychologists and reported a series of studies resulted from an invention of new experimental procedure. It showed an example of a Japanese researcher who had got rid of the inadequate approach by inventing a new experimental method. It also aimed to encourage Japanese psychologists to conduct innovative research and publish their studies in English journals.
Assessment of the Implicit Attitude of Japanese People toward Blacks and Little Black Sambo  [PDF]
Kazuo Mori
Open Journal of Social Sciences (JSS) , 2018, DOI: 10.4236/jss.2018.61001
We examined whether Japanese people, 47 junior high school students, 49 undergraduates, and 52 older adults, possessed negative attitudes against blacks and the picture book Little Black Sambo. We assessed the implicit attitude toward the target word pairs, “black/white” and “Sambo/Heidi,” by utilizing a paper-based Implicit Association Test and found that both black and Sambo were associated more negatively than white and Heidi. However, the implicit attitudes assessed with a single-target IAT showed that 67 Japanese students showed positive implicit scores for blacks but with smaller valences. A post hoc analysis revealed that the reading experience of Little Black Sambo did not show a significant difference between the implicit attitudes of those who had and had not read the book.
Automatic & Safe Oxytocin Induction of Labor  [PDF]
Kazuo Maeda
Open Journal of Obstetrics and Gynecology (OJOG) , 2018, DOI: 10.4236/ojog.2018.89084
Abstract: Aims: To prevent fetal damage by excess oxytocin administration of manually controlled infusion, by automatic and safe increasing infusion setting with monitoring uterine contraction and fetal heart rate. Methods: Starting infusion level was 2 milliU/ml, as oxytocin sensitivity of a pregnant uterus is unknown, to avoid hyper contraction and fetal bradycardia caused by unexpected excess oxytocin sensitivity. The infusion automatically increased with automatic monitoring of uterine contraction curve, then the increasing stopped when contraction reached to normal labor level, where the infusion level maintained, which continued until delivery, if there is no trouble. However, the infusion continued until expiring all fluid in case of insensitive uterus, where the induction was performed in another day. The infusion stopped automatically when contraction was too strong, or fetal heart rate is abnormal. Thus, oxytocin sensitive case is protected from excess contraction and fetal asphyxia. Results: Normal vaginal delivery was achieved in 28/33 cases (85%), which was more than manually controlled infusion. No case was abnormal in successful oxytocin infusion. Conclusion: The automated technique will be applied to oxytocin labor induction.
Effects of Pressure during Preform Densification on SiC/SiC Composites  [PDF]
Naofumi Nakazato, Akira Kohyama, Yutaka Kohno
Open Journal of Inorganic Non-metallic Materials (OJINM) , 2013, DOI: 10.4236/ojinm.2013.31003

The nano-infiltration and transient eutectic-phase (NITE) method is one of the most attractive methods for fabrication of SiC and SiC/SiC composites. In the NITE method, preform densification is essential option for damage less near-net shaping technique. However, optimization of preform densification is insufficient yet. The objective of this study is to evaluate the effects of pressure during preform densification on SiC/SiC composites. The preform before preform densification has many pores in the inter-prepreg sheets. These pores were disappeared by preform densification. As the effects of pressure on preform, densification in the intra-fiber-bundle was improved due to increasing pressure. Flexural strength of the preforms with 1 MPa and 17 MPa indicated almost same value. The result suggested that increasing of pressure did not cause any change in fiber properties. In the effects of pressure on the composites, the composites with 17 MPa was exhibited improvement in bulk density and mechanical property, compared with that with 1 MPa.

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