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Search Results: 1 - 10 of 376 matches for " Kitamura "
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Gender differences in recognising depression in a case vignette in a university student population: Interaction of participant and vignette subject gender with depressive symptomatology  [PDF]
Junko Andou, Toshinori Kitamura
Open Journal of Psychiatry (OJPsych) , 2013, DOI: 10.4236/ojpsych.2013.34041

Objective: Gender difference in depression prevalence may be explained by variation in the recognition of depression due to differences in gender identity. Method: We distributed one of four questionnaires describing fictional cases of Major Depressive Episode (MDE) (2 predominant symptom types × 2 case vignette subject genders) to 72 students. Participants were asked whether and how much they thought the subject in the case was emotionally as well as somatically ill. They were also administered the Center for Epidemiologic Studies-Depression Scale and the Ito Sex Role Scale. Results: Participants scoring high in gender identity communion and ideal gender roles communion and delicacy were more likely to identify the vignette subject as ill. The severity of somatic illness was rated more highly for the case of predominantly somatic symptomatology. The recognition of severity of psychological illness was influenced by two interactive terms: the gender of the vignette subjects x gender of the participants and predominant symptoms x gender of the vignette subjects. Recognition of MDE case vignettes as indicating illness, particularly psychological illness, was more likely when the participant was female, scored highly in femininity, or was of the gender as the case subject. Conclusion: These findings may be concordant with the self-schema theory.

Comb-Line Filter with Coupling Capacitor in Ground Plane
Toshiaki Kitamura
Active and Passive Electronic Components , 2011, DOI: 10.1155/2011/919240
Abstract: A comb-line filter with a coupling capacitor in the ground plane is proposed. The filter consists of two quarter-wavelength microstrip resonators. A coupling capacitor is inserted into the ground plane in order to build strong coupling locally along the resonators. The filtering characteristics are investigated through numerical simulations as well as experiments. Filtering characteristics that have attenuation poles at both sides of the passband are obtained. The input susceptances of even and odd modes and coupling coefficients are discussed. The filters using stepped impedance resonators (SIRs) are also discussed, and the effects of the coupling capacitor for an SIR structure are shown. 1. Introduction Miniaturization of microwave filters is highly demanded. For mobile telephones especially, ceramic laminated filters [1–4] have been widely used, and in particular, comb-line filters have extensively made practical use. In this study, comb-line filters in which both sides of the substrate are utilized are considered. Comb-line filters consist of two quarter-wavelength resonators, and attenuation poles can be created in the frequency characteristics of the transmission parameter by changing the coupling locally along the resonators [5]. The stopband characteristics can be improved by arranging the attenuation poles around the passband. In [1, 2], strong coupling between two resonators is obtained by installing a patch conductor on the dielectric substrate above the resonators. The patch conductor is referred to as a coupling capacitor ( ). The method of installing a coupling capacitor by inserting slots into the ground plane is discussed. By this method, a coupling capacitor can be achieved without using a multilayered structure. As a method of inserting slots into a ground plane, a defected ground structure (DGS) has been attracting much attention [6–8]. In a broad sense, the proposed structure is a kind of DGS. The filtering characteristics are investigated through numerical simulations as well as experiments. The filters using stepped impedance resonators (SIRs) are also discussed, and the effects of the coupling capacitor for an SIR structure are shown. 2. Filter Structure Figure 1 shows an overview of the proposed comb-line filter. Two microstrip resonators are arranged on the substrate, and each resonator is terminated through the ground plane at one end using a through hole. As an I/O port, a microstrip line with a characteristic impedance of 50?ohm is directly connected to each resonator. A square-shaped coupling capacitor is fabricated by
Numerical Analysis of Ridged-Circular Nanoaperture for Near-Field Optical Disk
Toshiaki Kitamura
ISRN Optics , 2013, DOI: 10.1155/2013/543960
Abstract: A ridged-circular nanoaperture is investigated through three-dimensional (finite-difference time-domain) FDTD method. The motion equations of free electrons are inserted to analyze a metallic material. The electromagnetic field distributions of optical near-field around the aperture are investigated. The phase change disk illuminated by a near-field optical light through a ridged-circular nanoaperture is also analyzed. The far-field scattering patterns from the phase change disk and the crosstalk characteristics between plural marks are studied. 1. Introduction The recording density of conventional optical recording systems has an optical diffraction limit. Recently, there has been a lot of interest in the field of optical storage technologies for the recording methods that are based on near-field optical principles. This is because they have the potential to overcome the limitation by using the localized optical near-field for writing and reading recorded marks. Many types of nanoapertures and nanoantennas have been proposed to achieve the high throughput of the optical near-field [1–4]. This study focuses on a ridged-circular nanoaperture for a near-field optical disk. The analysis is accomplished by the FDTD method into which the motion equations of free electrons are inserted [5–7]. This method can easily deal with Drude dispersion and it can be applied to the analysis of various plasmonic devices. First, the electromagnetic field distributions of optical near-field around the ridged-circular nano-aperture are analyzed. Next, the scattering characteristics from a phase change disk with the aperture are studied. Finally, the crosstalk characteristics between plural marks are discussed. 2. FDTD Formulation In the FDTD method, special handling of the metallic material is required because the permittivity is dispersive and has a negative value in the optical frequency. In this study, the following motion equation is introduced into the FDTD method to evaluate the conducting current: where is the electron velocity, is the electric field, is the elementary electric charge, is the electron mass, and is the collision frequency. The collision frequency is expressed as follows: where is the angular frequency of a light wave and and are the real and imaginary parts, respectively, of the complex refractive index of a metallic material ( ). Maxwell’s equations are expressed as follows by representing the current density using the electron velocity and the electron density : where is the magnetic field and and are the electric permittivity and magnetic
Theory of the liquid-glass transition in water
T. Kitamura
Physics , 2005,
Abstract: A quantum field theory of the liquid-glass transition in water based on the two band model in the harmonic potential approximation is presented by taking into account of the hydrogen bonding effect and the polarization effect. The sound and diffusion associated with intra-band density fluctuations, and the phonons and viscocity associated with inter-band density fluctuations are calculated. The Kauzmann paradox on the Kauzmann's entropy crisis and the Vogel-Tamman-Fulcher (VTF) law on the relaxation times and the transport coefficients are elucidated from the sound instability at a reciprocal particle distance corresponding a hydrogen bond length and at the sound instability temperature very close to the Kauzmann temperature. The gap of specific heat at the glass transition temperature and the boson peaks are also presented.
Donnan Electric Potential Dependence of Intraparticle Diffusion of Malachite Green in Single Cation Exchange Resin Particles: A Laser Trapping-Microspectroscopy Study  [PDF]
Nguyen M. Cuong, Shoji Ishizaka, Noboru Kitamura
American Journal of Analytical Chemistry (AJAC) , 2012, DOI: 10.4236/ajac.2012.33027
Abstract: A laser trapping-microspectroscopy technique combined with excitation energy transfer from a fluorescent cationic dye (Rhodamine B, RB+) to a non-fluorescent cationic dye (Malachite Green, MG+) was employed to study pH effects on the diffusion coefficients of MG+ (D(MG+)) in single cation-exchange resin microparticles with the diameters of 16 μm. When RB+-pre-adsorbed resin particles were soaked in an aqueous MG+ solution, the RB+ fluorescence was quenched gradually with the soaking time. The time course of the quenching efficiency of RB+ by MG+ was then used to evaluate the D(MG+) value in the particle. The D(MG+) value increased from 1.1 × 10-11 to 4.3 × 10-11 cm2.s–1 on going the solu- tion pH value from 9 to 4. The results were explained reasonably by a Donnan electric potential model.
Psychosocial Factors Affecting the Use of Mammography Testing for Breast Cancer Susceptibility: An Eight-Month Follow-Up Study in a Middle-Aged Japanese Woman Sample  [PDF]
Keiichiro Adachi, Toshinori Kitamura, Tokumi Ueno
Open Journal of Medical Psychology (OJMP) , 2013, DOI: 10.4236/ojmp.2013.24024
Abstract: We examined the psychosocial factors affecting middle-aged Japanese women’s intentions to undergo mammography, as well as their actual usage of mammography by applying the Parallel Processing Model (PPM) of self regulation longitudinally. A total of 1030 middle-aged women living in all parts of Japan participated in this study through internet research from September 2010 to May 2011. The participants were evaluated on the basis of a battery of questionnaires mainly including demographics, perceived breast cancer risk, worry about breast cancer, mammography testing beliefs, intentions to use mammography, seeking information about mammography, and actual usage of mammography thrice over an eight-month period. The main results were as follows: 1) Perceived risk and cancer worry affected the intention of undergoing mammography, and this effect was mediated by beliefs about mammography testing. 2) Intention to use mammography and past mammography usage predicted future usage of mammography, with past mammography usage being the strongest predictor. 3) Information seeking about mammography was the strongest predictor of using mammography during the eight-month follow-up period of middle-aged women who had not undergone any mammography testing. PPM was a useful model to explain the mechanism behind middle-aged Japanese women’s intentions to use mammography, as well as their actual usage of mammography. In addition, past mammography experience was the strongest predictor of regular mammography usage and information seeking was a critical factor for the first-usage of mammography.
Factor Structure of the Coping Inventory for Stressful Situations (CISS) in Japanese Workers  [PDF]
Yukihiro Takagishi, Masatsugu Sakata, Toshinori Kitamura
Psychology (PSYCH) , 2014, DOI: 10.4236/psych.2014.514172
Abstract: Different models of factor structure were proposed for the Coping Inventory for Stressful Situations (CISS) as a measure of coping style. This study confirmed psychometric properties and stability of the factor structure and differences among models for various age groups. The CISS of the Japanese version and the Hopkins Symptom Checklist (HSCL) were administered to a sample of 781 Japanese workers. Using factor analysis, three-, four-, and five-factor models were examined. Simultaneous multiple-group analysis was conducted using samples of 568 workers and 507 students. The five-factor model was more robust than the original three- and four-factor models. Reliabilities and applicability for a wide age range were confirmed. In terms of predictive validity, symptoms of somatization, obsessive-compulsiveness, interpersonal sensitivity, depression, and anxiety were positively related with Rumination coping.
Nonequilibrium Effect in Ferromagnet-Insulator-Superconductor Tunneling Junction Currents  [PDF]
Michihide Kitamura, Kazuhiro Yamaki, Akinobu Irie
World Journal of Condensed Matter Physics (WJCMP) , 2016, DOI: 10.4236/wjcmp.2016.63018
Abstract: Nonequilibrium effect due to the imbalance in the number of the ? and ? spin electrons has been studied for the tunneling currents in the ferromagnet-insulator-superconductor (FIS) tunneling junctions within a phenomenological manner. It has been stated how the nonequilibrium effect should be observed in the spin-polarized quasiparticle tunneling currents, and pointed out that the detectable nonequilibrium effect could be found in the FIS tunneling junction at 77 K using HgBa2Ca2Cu3O8+? (Hg-1223) high-Tc superconductor rather than Bi2Sr2CaCu2O8+? (Bi-2212) one.
Passively-Strictly Strong Nash Equilibrium in a Preference Revelation Game under the Student-Optimal Deferred Acceptance Algorithm  [PDF]
Chengyue Li, Takehiro Inohara, Masahito Kitamura
Theoretical Economics Letters (TEL) , 2017, DOI: 10.4236/tel.2017.75084
Abstract: We revisit a college admission market and a related preference revelation game under the student-optimal deferred acceptance algorithm (SODA). Previous research has demonstrated the existence of a strictly strong Nash equilibrium (SSN) based on either an iterative deferred acceptance algorithm (DA-SSN) or the core of a corresponding house allocation problem (Core-SSN). We propose a new equilibrium concept called passively-strictly strong Nash equilibrium (P-SSN). It rules out a kind of deviation called passively weak deviation which includes students who were threatened to deviate. Then we show two preliminary existence results about P-SSN. (i) If the DA-SSN and the Core-SSN are not equivalent, then neither of them is a P-SSN. (ii) If the matching determined by the DA-SSN satisfies a property called irrelevance of low-tier agents, then the DA-SSN is also a P-SSN.
Smoothness of ozone profiles: analysis of 11 years of ozone sonde measurements at Sodankyl
R. G. Rastogi, T. Kitamura,K. Kitamura
Annales Geophysicae (ANGEO) , 2004,
Abstract: The paper discusses the variations of the horizontal (H), vertical (Z) and eastward (Y) components of the geomagnetic field at Peredinia (PRD), an electrojet station in Sri Lanka, with the time of the day, season, sudden commencement (SSC) and during geomagnetic storms. The daily variation of H showed a large peak around midday. The daily variation of Z appeared to be almost a time gradient curve of the daily variation of H, showing a maximum around 09:00 LT (75° EMT) when the H field was increasing fastest and not at noon when Δ H was the maximum. Storm time variation of H resembled the variation of the Dst index but that of Z showed a large minimum about 2-3h before the time of minimum Dst or at the time of maximum time gradient of Dst variation. These features are compared with corresponding variations at the equatorial stations Trivandrum (TRD) in India, and remarkable similarity in all observations is noticed at PRD and TRD. It is suggested that the observed abnormal features of Z variations at electrojet stations in India-Sri Lanka are due to (i) direct effect of the ionospheric electrojet current (ii) the induction effect of the image current by the average spatially extended conductivity region and (iii) the induction current in the local subsurface conductor. It is suggested that the conductor responsible for the observed features in Z in India and Sri Lanka has to have extended spatial domain to latitudes well south of India, rather than confined to narrow Palk Strait.
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