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Search Results: 1 - 10 of 50740 matches for " Y. Toda "
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Quenching of phase coherence in quasi-one dimensional ring crystals
K. Shimatake,Y. Toda,S. Tanda
Physics , 2005, DOI: 10.1103/PhysRevB.73.153403
Abstract: The comparison of the single-particle (SP) dynamics between the whisker and ring NbSe$_3$ crystals provides new insight into the phase transition properties in quasi-one-dimensional charge density wave (CDW) systems.
Polyphenol Content and Antioxidant Effects in Herb Teas  [PDF]
Shizuo Toda
Chinese Medicine (CM) , 2011, DOI: 10.4236/cm.2011.21005
Abstract: Herb teas, Arabian jasmine, Balsam pear, Barley grass, Guava, Hardy rubber tree, Japanese persimmon, Jobs tears, Oolong tea, Puerh tea and Wolofberry have been consumed as beverages for health in Asia. Oxidative stress induces various diseases. Some of them, Arabian jasmine, Guava, Hardy rubber tree, Japanese per-simmon, Oolong tea and Puerh tea, have high total polyphenol content and antioxidant activities. Herbs and herbal polyphenols pay in controlling oxidation and prevent the damage by oxidation. These results showed that some of them, Arabian jasmine, Guava, Hardy rubber tree, Japanese persimmon, Oolong tea and Puerh tea, have high total polyphenol content and antioxidant activities. It has been demonstrated that high total polyphenol content in the herb teas provides high antioxidant activities.
Effect of Acupuncture on Carnitine for Skeletal Muscle Fatigue  [PDF]
Shizuo Toda
Chinese Medicine (CM) , 2012, DOI: 10.4236/cm.2012.31003
Abstract: Skeletal muscle fatigue is a common symptom in various diseases, works and exercises. These were generally induced by neuron, metabolic conditions, overused muscle, and stress. But, there have been few principles about it. Many researchers have reported that acupuncture therapy has been useful to skeletal muscle fatigue on various diseases and conditions. However, it has never been shown why acupuncture therapy has the effect on skeletal muscle fatigue. The deficiency of carnitine induces fatigue, weakness, and disorder of skeletal muscle. It has showed that acupuncture induces the increase of carnitine in skeletal muscle. These findings demonstrated that acupuncture on skeletal muscle fatigue could increase carnitine as a possible affection mechanism.
Optical diffraction spectroscopy of excitons in uniaxially-strained GaN films
Y. Toda,S. Adachi,Y. Abe,K. Hoshino,Y. Arakawa
Physics , 2004, DOI: 10.1103/PhysRevB.71.195315
Abstract: The degenerate four-wave mixing spectroscopy of uniaxially strained GaN layers is demonstrated using colinearly polarized laser pulses. The nonlinear response of FWM signal on exciton oscillator strength enhances the sensitivity for polarized exciton, allowing for mapping out the in-plane anisotropy of the strain field. The observed high-contrast spectral polarization clearly shows fine structure splittings of excitons, which are also confirmed in the change of quantum beating periods of time.
Significance of adrenomedullin under cardiopulmonary bypass in children during surgery for congenital heart disease.
Takeuchi M,Morita K,Iwasaki T,Toda Y
Acta Medica Okayama , 2001,
Abstract: To elucidate the effect of adrenomedullin (AM) on fluid homeostasis under cardiopulmonary bypass (CPB), we investigated the serial changes in plasma AM and other parameters related to fluid homeostasis in 13 children (average age, 28.2 months) with congenital heart disease during cardiac surgery under CPB. Arterial blood and urine samples were collected just after initiation of anesthesia, just before commencement of CPB, 10 min before the end of CPB, 60 min after CPB, and 24 h after operation. Plasma AM levels increased significantly 10 min before the end of CPB and decreased 24 h after operation. Urine volume increased transiently during CPB, which paralleled changes in AM. Simple regression analysis showed that plasma AM level correlated significantly with urinary vasopressin, urine volume, urinary sodium excretion, and plasma osmolarity. Stepwise regression analysis indicated that urine volume was the most significant determinant of plasma AM levels. Percent rise in AM during CPB relative to control period correlated with that of plasma brain natriuretic peptide (r = 0.57, P < 0.01). Our results suggest that AM plays an important role in fluid homeostasis under CPB in cooperation with other hormones involved in fluid homeostasis.
Multifactorial study of mobile phone dependence in medical students: Relationship to health-related lifestyle, Type A behavior, and depressive state  [PDF]
Masahiro Toda, Satoko Ezoe
Open Journal of Preventive Medicine (OJPM) , 2013, DOI: 10.4236/ojpm.2013.31012
Abstract: We investigated factors contributing to mobile phone dependence. To 139 medical students, we administered a self-reporting questionnaire designed to evaluate mobile phone dependence, health-related lifestyle, patterns of behavior, and depressive state. Multivariate logistic regression analysis revealed that scores for poor health-related lifestyle, Type A behavior pattern, and presence of depression are independently associated with degree of mobile phone dependency. These findings suggest that persons with an unhealthy lifestyle, Type A behavior traits, or depression might benefit from mobile phone use guidance.
Relationships of loneliness and mobile phone dependence with Internet addiction in Japanese medical students  [PDF]
Satoko Ezoe, Masahiro Toda
Open Journal of Preventive Medicine (OJPM) , 2013, DOI: 10.4236/ojpm.2013.36055
Abstract: We investigated factors contributing to Internet addiction in 105 Japanese medical students. The subjects were administered by a self-reporting questionnaire designed to evaluate demographic factors, Internet addiction, loneliness, health-related lifestyle factors, depressive state, patterns of behavior, and mobile phone dependence. Results of multivariate logistic regression analysis indicated that loneliness and mobile phone dependence were positively related to degree of addiction. Our findings suggest that Internet addiction is associated with loneliness and mobile phone dependence in Japanese students.
Effects of Influential Parameters on Long-Term Channel Evolution Following Low-Head Dam Construction and Removal  [PDF]
Sinae Kim, Yuji Toda
Journal of Water Resource and Protection (JWARP) , 2018, DOI: 10.4236/jwarp.2018.108044
Abstract: The long-term existence of dam structures significantly modified the river channel. In accordance with a drastic increase of low-head dams under consideration for removal in recent years, it is important to predict the effects of low-head dam removal from the modified river channel by the low-head dam construction. This study intends to investigate the long-term channel evolution process following low-head construction and removal and to find out the influential parameters (sediment diameter, river bed slope, dam height) for those channel evolution by two-dimensional numerical simulation model. Following the low-head dam construction, sediment deposition rates in upstream of the low-head dam are varied with the influential parameters. The sediment deposition rates and sandbar formation with riparian vegetation settlement on sandbars have significantly affected for channel evolution following low-head dam removal. Especially the knickpoint formation and the types of vegetation (grass type and tree type) on the sandbars are critical factors for channel evolution following low-head dam removal. Through the numerical simulation results of low-head dam construction (50 years) and low-head dam removal (50 years), it is identified that the modified river channel by low-head dam may not be easily restored to pre-dam conditions following its removal especially in river geomorphology and riparian vegetation. Consequently, this study found that the reversibility following low-head dam construction and removal depends on the sediment deposition rates in upstream of the low-head dam.
Cultural Sensitivity of Japanese Nurses: Exploring Clinical Application of the Intercultural Sensitivity Scale  [PDF]
Tomiko Toda, Mitsue Maru
Open Journal of Nursing (OJN) , 2018, DOI: 10.4236/ojn.2018.89048
Abstract: Unlike Western countries, Asian countries have a brief history of caring for patients with various cultural and linguistic backgrounds. Healthcare professionals face difficulty in providing care to foreign patients. Presumably, those with higher cultural sensitivity possess higher cultural competency, and cultural indicators are associated with personal factors, such as interest in or learning experience of foreign languages. We examined correlations between Intercultural Sensitivity Scale (ISS) and Cultural Competence in Nursing Scale (CCNS) scores in Japanese nurses and discussed implications of our findings in increasing cultural sensitivity in countries with limited exposure to foreign culture. A questionnaire survey on ISS, CCNS, and personal factors was conducted among 156 nurses. Correlations among the two scales and personal factors were analyzed. Total ISS scores were comparable with previously reported scores. ISS and CCNS scores were moderately correlated. ISS subscale scores were moderately correlated with the learning experience of foreign languages. Nurses most commonly learned English; most foreign patients were Chinese. Experiences of providing care to foreign patients were not related to cultural sensitivity. The lowest ISS score was obtained in “interaction confidence” subscale. Languages used by foreign patients did not match languages that nurses had interest in or had learned; this may contribute to their low confidence in interacting with foreigners. Nurses in a country with limited exposure to different cultures need educational intervention for providing care to foreigners regardless of their cultural experiences. ISS may be useful to identify nurses who need further education to foster confidence while interacting with foreigners.
Direct observation of the coexistence of pseudogap and superconducting quasi-particles in Bi2212 by time-resolved optical spectroscopy
Y. H. Liu,Y. Toda,K. Shimatake,N. Momono,M. Oda,M. Ido
Physics , 2008, DOI: 10.1103/PhysRevLett.101.137003
Abstract: We report the ultra-fast optical response of quasi-particles (QPs) in both the pseudogap (PG) and superconducting (SC) states of underdoped (UD) Bi$_{2}$Sr$_{2}$CaCu$_{2}$O$_{8+\delta}$ (Bi2212) single crystal measured with the time-resolved pump-probe technique. At a probe energy $\hbar\omega_{pr}$=1.55 eV, it is found that the reflectivity change $\Delta$R/R changes its sign at exactly $T_{c}$, which allows the direct separation of the charge dynamics of PG and SC QPs. Further systematic investigations indicate that the transient signals associated with PG and SC QPs depend on the probe beam energy and polarization. By tuning them below $T_{c}$ two distinct components can be detected simultaneously, providing evidence for the coexistence of PG and SC QPs.
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