http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Feature extraction of light sleep state in polysomnogram by use of conditional probability
Hiroaki Yoshiyama,Takenao Sugi,Bei Wang,Shuichiro Shirakawa,Masatoshi Nakamura 제어로봇시스템학회 2009 제어로봇시스템학회 국제학술대회 논문집 Vol.2009 No.8
Human sleep stages during whole right are usually classified into six stages based on polysommnographic (PSG) record. Sleep state of human light sleep changes gradually and continously. In this study, automatic judgrenet of light sleep state in PSG record was developed. Parameters for characterizing the PSG were calculated from the periodogram and the discriminant funtion was constructed by using conditional probability. Estimated value of wake full level was grdually decreased according to the stage charged from W to S1. In conuast, changing the sleep state from S1 to S2 increased estimated value of sleep level accordingly.
Combustion of stratified charge propane-air mixture with swirling flow in a constant-volume vessel
Eiji Tomita,Nobuyuki Kawahara,Atsushi Nishiyama,Sadami Yoshiyama,Yoshisuke Hamamoto 한국자동차공학회 2001 한국자동차공학회 Symposium Vol.- No.-
Direct injection spark ignition engines can achieve better thermal efficiency by applying stratified fuel concentration in the combustion chamber. The purpose of this study is to clarify the combustion in such inhomogeneous fuel concentration field. The combustion of inhomogeneous fuel concentration field in a cylindrical constant volume vessel was fundamentally investigated axisymmetrically. A swirling fuel-air mixture was produced in the vessel. A rich fuel concentration was formed near the center of the vessel by the injection of propane. The mixture was ignited at the center of the vessel. The experimental runs were done under various conditions at fuel distribution and swirl flow at the ignition timing. The fuel concentration distribution at the ignition timing was measured using laser-induced fluorescence. The gas flow field was obtained with a laser Doppler velocimeter in advance. The pressure history in the combustion chamber was analyzed to determine the combustion characteristics. Furthermore, a high-speed video camera was used to capture the flame development. The flame can propagate and the combustion occurs even in an ultra lean mixture of equivalence ratio of 0.3 in total. As the fuel concentration near the spark location approximates stoichiometric, flame propagation of the initial stage of the combustion becomes faster under an ultra lean mixture condition.<br/> <br/>
Tsuyoshi Hattori,Philippe Lluel,Céline Rouget,Moèz Rekik,Mitsuharu Yoshiyama 대한배뇨장애요실금학회 2017 International Neurourology Journal Vol.21 No.1
Purpose: The aim of this study was to assess the potential involvement of a specific subtype of 5-hydroxytryptamine (5-HT), 5HT2 receptors in neurally-induced contractions of the human detrusor. Methods: Contractile responses to electrical field stimulation (EFS) were examined in human isolated urinary bladder muscle strips. The potentiation of EFS-induced detrusor contraction was examined by adding cumulative concentrations of a 5-HT and 5-HT2 receptor agonist, α-methyl-serotonin (α-Me-5-HT) (1nM–100μM) in the presence or absence of a 5-HT2 antagonist, ketanserin (5-HT2A>5-HT2C) or naftopidil (5-HT2B>5-HT2A) (0.3–3μM). Results: 5-HT and α-Me-5-HT potentiated EFS-induced contraction with a maximal effect (Emax) of 37.6% and 38.6%, respectively, and with pEC50 (negative logarithm of the concentration required for a half-maximal response to an agonist) values of 8.3 and 6.8, respectively. Neither ketanserin nor naftopidil at any concentration produced a rightward displacement of the α-Me-5-HT concentration response curve. Instead, the Emax of α-Me-5-HT increased in the presence of ketanserin at 0.3–1μM and in the presence of naftopidil at 1μM to 51% and 56%, respectively, while the Emax in the presence of vehicle alone was 36%. The highest concentration (3μM) of either drug, however, fully reversed the enhancement. Conclusions: The potentiating effect of α-Me-5-HT on neurally-induced contraction of human urinary bladder muscle strips was not found to be mediated via any 5-HT2 receptor subtypes. The underlying mechanism for the enhancement of the α-Me- 5-HT potentiating effect on detrusor contractility by ketanserin and naftopidil remains unknown; however, our results suggest that these drugs may be useful for treating contractile dysfunction of the detrusor, as manifested in conditions such as underactive bladder.
Kazuhiko Shibuya,Naoko Ohara,Serina Ono,Kumiko Matsuzaki,Masahiro Yoshiyama 대한치과보존학회 2019 Restorative Dentistry & Endodontics Vol.44 No.4
Objectives: Self-adhesive resin cements contain functional monomers that enable them to adhere to the tooth structure without a separate adhesive or etchant. One of the most stable functional monomers used for chemical bonding to calcium in hydroxyapatite is 10-methacryloyloxydecyl dihydrogen phosphate (10-MDP). The aim of this study was to evaluate the influence of the10-MDP concentration on the bond strength and physical properties of self-adhesive resin cements. Materials and Methods: We used experimental resin cements containing 3 different concentrations of 10-MDP: 3.3 wt% (RC1), 6.6 wt% (RC2), or 9.9 wt% (RC3). The micro-tensile bond strength of each resin cement to dentin and a hybrid resin block (Estenia C&B, Kuraray Noritake Dental) was measured, and the fractured surface morphology was analyzed. Further, the flexural strength of the resin cements was measured using the three-point bending test. The water sorption and solubility of the cements following 30 days of immersion in water were measured. Results: The bond strength of RC2 was significantly higher than that of RC1. There was no significant difference between the bond strength of RC2 and that of RC3. The water sorption of RC3 was higher than that of any other cement. There were no significant differences in the three-point bending strength or water solubility among all three types of cements. Conclusions: Within the limitations of this study, it is suggested that 6.6 wt% 10-MDP showed superior properties than 3.3 wt% or 9.9 wt% 10-MDP in self-adhesive resin cement.
Shibuya, Kazuhiko,Ohara, Naoko,Ono, Serina,Matsuzaki, Kumiko,Yoshiyama, Masahiro The Korean Academy of Conservative Dentistry 2019 Restorative Dentistry & Endodontics Vol.44 No.4
Objectives: Self-adhesive resin cements contain functional monomers that enable them to adhere to the tooth structure without a separate adhesive or etchant. One of the most stable functional monomers used for chemical bonding to calcium in hydroxyapatite is 10-methacryloyloxydecyl dihydrogen phosphate (10-MDP). The aim of this study was to evaluate the influence of the10-MDP concentration on the bond strength and physical properties of self-adhesive resin cements. Materials and Methods: We used experimental resin cements containing 3 different concentrations of 10-MDP: 3.3 wt% (RC1), 6.6 wt% (RC2), or 9.9 wt% (RC3). The micro-tensile bond strength of each resin cement to dentin and a hybrid resin block (Estenia C&B, Kuraray Noritake Dental) was measured, and the fractured surface morphology was analyzed. Further, the flexural strength of the resin cements was measured using the three-point bending test. The water sorption and solubility of the cements following 30 days of immersion in water were measured. Results: The bond strength of RC2 was significantly higher than that of RC1. There was no significant difference between the bond strength of RC2 and that of RC3. The water sorption of RC3 was higher than that of any other cement. There were no significant differences in the three-point bending strength or water solubility among all three types of cements. Conclusions: Within the limitations of this study, it is suggested that 6.6 wt% 10-MDP showed superior properties than 3.3 wt% or 9.9 wt% 10-MDP in self-adhesive resin cement.