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Search Results: 1 - 10 of 556 matches for " Katsuhiko Tada "
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Effects of Partners’ Attitudes towards Wife’s Aspirations on Depression after Childbirth  [PDF]
Eriko Shinohara, Keiko Yoshida, Kaoru Sakumoto, Katsuhiko Tada, Shoji Sato, Toshinori Kitamura, Satoru Takeda
Open Journal of Depression (OJD) , 2017, DOI: 10.4236/ojd.2017.63006
Abstract: A lack of social support for pregnant women is associated with depression after childbirth. However, few studies have examined the impact of the partners’ understanding of and support for the women’s aspirations (personal goals in life) on the severity of depression after childbirth. To examine the relationship between a partner’s attitude to his wife’s aspirations and depression after childbirth, a longitudinal study was conducted of 290 primipara women from five university hospitals between October 1997 and March 2000. Three questionnaires were administered to participant women. During their third trimester, they were asked about their aspirations (Aspiration Index) and their perception of their partners’ understanding of and support for their aspirations. At one month and three months after childbirth, they were asked about the severity of their depression (Edinburgh Postnatal Depression Scale). Correlation analyses and structural equation modelling showed that the partners’ poor understanding and support predicted the severity of depression after childbirth. Perinatal health professionals should be encouraged to assess the pregnant women’s aspirations and their partners’ understanding and support regarding the women’s goals in life.
Secure Implementation in Queueing Problems  [PDF]
Katsuhiko Nishizaki
Theoretical Economics Letters (TEL) , 2012, DOI: 10.4236/tel.2012.25103

This paper studies secure implementability (T. Saijo, T. Sjostrom and T. Yamato, Secure Implementation,Theoretical Economics, Vol. 2, No. 3, 2007, pp. 203-229) in queueing problems. Our main result shows that the social choice function satisfies strategy-proofness and strong non-bossiness (Z. Ritz, Restricted Domains, Arrow-Social Welfare Functions and Noncorruptible and Non-Manipulable Social Choice Correspondences: The Case of Private Alternatives,Mathematical Social Science, Vol. 4, No. 2, 1983, pp. 155-179), both of which are necessary for secure imple- mentation, if and only if it is constant on the domains that satisfy weak indifference introduced in this paper. Weak in- difference is weaker than minimal richness (Y. Fujinaka and T. Wakayama, Secure Implementation in Economies with Indivisible Objects and Money, Economics Letters, Vol. 100, No. 1, 2008, pp. 91-95). Our main result illustrates that secure implementation is too difficult in queueing problems since many reasonable domains satisfy weak indifference, for example, convex domains.

Current-Controlled CFTA Based Fractional Order Quadrature Oscillators  [PDF]
Tada Comedang, Pattana Intani
Circuits and Systems (CS) , 2016, DOI: 10.4236/cs.2016.713345
Abstract: This paper presents a study of fractional order quadrature oscillators based on current-controlled current follower transconductance amplifiers (CCCFTA). The design realisation and performance of the fractional order quadrature oscillators have been presented. The quadrature oscillators are constructed using three fractional capacitors of orders α = 0.5. The fractional capacitor is not available on the market or in the PSPICE program. Fortunately, the fractional capacitor can be realised by using the approximate method for the RC ladder network approximation. The oscillation frequency and oscillation condition can be electronically/orthogonally controlled via input bias currents. Due to high-output impedances, the proposed circuit enables easy cascading in current-mode (CM). The PSPICE simulation results are depicted, and the given results agree well with the anticipated theoretical outcomes.
Idiopathic Epicardial Ventricular Arrhythmias: Diagnosis and Ablation Technique from the Aortic Sinus of Valsalva
Hiroshi Tada
Indian Pacing and Electrophysiology Journal , 2005,
Abstract: Idiopathic outflow tract arrhythmias (ventricular tachycardias or symptomatic premature ventricular contractions; OT-VT/PVCs) can originate from the left ventricular (LV) epicardium (Epi-VT/PVCs), and radiofrequency (RF) energy applications from the aortic sinus of Valsalva can eliminate Epi-VT/PVCs in selected patients. Among the various ECG findings, the R-wave duration index and R/S amplitude index in leads V1 or V2 are useful for identifying Epi-VT/PVCs, and the Q-wave ratio of leads aVL to aVR and S-wave amplitude in lead V1 are useful for differentiating between an Epi-VT/PVC originating from the LV epicardium remote from the left sinus of Valsalva (LSV) and that from the LSV. Tissue tracking imaging is a promising modality for identifying the origin of OT-VT/PVCs and for differentiating between an Epi-VT/PVC originating from the LV epicardium remote from the LSV and that from the LSV. If the origin of the Epi-VT/PVC is identified within the LSV, coronary and aortic angiography should be performed to assess the anatomic relationships between the Epi-VT/PVC origin and coronary arteries and aortic valve before the RF energy delivery. To avoid potential complications, RF ablation should be performed at the LSV using a maximum power of 35 watts and maximum temperature of 55°C. Epicardial mapping through the coronary venous system and the presence of potentials recorded from the ablation site within the LSV and their changes before and after the RF energy applications may be useful for diagnosing Epi-VT/PVCs or predicting a successful catheter ablation from the LSV.
Toward the Philosophy of CAM: Super-system and Epimedical Sciences
Tomio Tada
Evidence-Based Complementary and Alternative Medicine , 2004, DOI: 10.1093/ecam/neh012
Matrix model criticality and resonant tunneling
Tsukasa Tada
Physics , 2012, DOI: 10.1143/PTP.128.429
Abstract: We suggest that the Hermitian matrix models with resonant tunneling may exhibit novel criticality. Some features of the proposed criticality are explored. In particular, we argue that the new critical point is connected with the first-order transition.
Sine-Square Deformation and its Relevance to String Theory
Tsukasa Tada
Physics , 2014, DOI: 10.1142/S0217732315500923
Abstract: Sine-square deformation, a recently found modulation of the coupling strength in certain statistical models, is discussed in the context of two-dimensional conformal field theories, with particular attention to open/closed string duality. This deformation is shown to be non-trivial and leads to a divergence in the worldsheet metric. The structure of the vacua of the deformed theory is also investigated. The approach advocated here may provide an understanding of string duality through the worldsheet dynamics.
Equilibrium Surface Current and Role of U(1) Symmetry: sum rule and surface perturbations
Yasuhiro Tada
Physics , 2015, DOI: 10.1103/PhysRevB.92.104502
Abstract: We discuss effects of surface perturbations on equilibrium surface currents which contribute to orbital magnetization and orbital angular momentum in systems without time reversal symmetry. We show that, in a U(1) particle number conserving system, disorder and other perturbations at a surface do not affect the equilibrium surface current and corresponding orbital magnetization due to a sum rule which is analogous to Luttinger's theorem. On the other hand, for a superfluid, the sum rule is no longer applicable and hence the surface mass current and corresponding orbital angular momentum can depend on details of a surface.
Prevention of Adiposity by the Oral Administration of β-Cryptoxanthin
Katsuhiko Takayanagi
Frontiers in Neurology , 2011, DOI: 10.3389/fneur.2011.00067
Abstract: β-Cryptoxanthin (β-CRX) is a carotenoid found in human blood. It is specifically rich in Satsuma mandarin (Citrus unshiu Marc.) but very little in other fruits or vegetables. Several reports indicate the health promoting benefits of β-CRX. As we had reported visceral fat reduction on mildly obese male by the oral administration of β-CRX, a detailed mechanism has not been identified. To identify the mechanism, obese model mouse, TSOD was used in the present study. Oral administration of β-CRX repressed body weight, abdominal adipose tissue weight, and serum lipid concentrations on TSOD mice. The outstanding observation is the significant repression of adipocyte hypertrophy. DNA microarray analysis strongly indicates that the oral administration of β-CRX represses the inflammatory cytokine secretion and improves the lipid metabolism and the energy consumption. It also suggests these effects are partly mediated by PPAR-α, not only lipid metabolism and adipocyte differentiation control but possibly internal circadian clock modulation.
Roles of Diquarks in the Nucleon for the Deep Inelastic Scattering and the Non-leptonic Weak Transitions
Katsuhiko Suzuki
Physics , 1994, DOI: 10.1016/0375-9474(94)90879-6
Abstract: We study roles of quark-quark correlations in the baryons for the deep inelastic structure function and the ${\Delta}I=1/2$ rule of the non-leptonic weak hyperon decay. The quark-quark correlation is incorporated phenomenologically as diquarks within the Nambu and Jona-Lasinio model. The strong diquark correlations in the spin-0 channel enhance the ${\Delta}I=1/2$ weak matrix elements, and account for the ${\Delta}I=1/2$ rule. The ratio of the nucleon structure functions $F_2^{n}(x)/F_2^{p}(x)$ also comes to agree with experiment due to the diquark correlations.
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