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Chin-Chin Chou,John Keegan,Nicole Ditchman,Fong Chan,Kanako Iwanaga,Cahit Kaya,Kevin Bengtson,Mayu Fujikawa,Soo-Yin Tan 한국상담학회 2021 Journal of Asia Pacific counseling Vol.11 No.1
Positive psychology emerged as a movement in professional psychology that emphasizes the positive psychological aspects of the individual instead of focusing on diagnosis and psychopathology. Peterson and Seligman (2004) developed and validated the 240-item Virtues in Action Inventory of Strengths (VIA-IS) to assess character strengths and virtues that enable optimal human thriving. However, VIA-IS is often considered too long for use by clinicians in their private practices, as well as for researchers interested in conducting positive psychology research. The purpose of the present study was to evaluate the psychometric properties of a 24-item Values in Action Semantic Differential Scale (VIA-SDS) in a sample of 231 Singaporean university students. Exploratory factor analysis revealed a 4-factor measurement structure (Humanity, Optimism, Leadership, and Creativity) with Cronbach’s alpha coefficients ranging from .67 to .88. Three of the four latent variables were positively associated with happiness and negatively related to perceived stress and depression. These findings support the validity of the VIA-SDS for use as a brief clinical assessment instrument by clinicians and researchers to assess character strengths.
Chung-Che Chou,Gee‑Jin Yu,Kung‑Juin Wang,Wei‑Tze Chang,Chiun‑Lin Wu,Charlene Chin‑Jie Zhao,Chun‑Yao Yang,Ming‑Ti Chou 한국정밀공학회 2023 International Journal of Precision Engineering and Vol.24 No.9
This paper presents a study to investigate the feasibility of using robotic welding technologies to weld the continuity plate and the column flange plate during manufacturing steel built-up box columns in buildings. Specimens designed to emulate the key components in the steel beam-to-column moment connections for Special moment frame were fabricated and welded using a proposed automated procedure that performs multi-layer, multi-pass welding for thick steel plates. Effects of controlling parameters on robotic welding results that includes the manner of bead stacking, wire feed speed, travel speed, working angle, arc voltage, the path of the welding pass, and the methods to start and finish welding passes were investigated. The quality of the welded products was assessed by visual inspection and ultrasonic testing (UT). Further mechanical tests including tensile tests, bending tests, and cyclic loading tests were carried out on selected welded products that passed the UT examination. The test results indicated that the robotic welds showed no visible damage or cracks, met requirements specified in the AWS specification, and exhibited satisfactory strength and ductility.
Psoas Abscess Caused by Non-Typhoid Salmonella in a Patient with Severe Aplastic Anemia
Chin-Chi Kuo,Shih-Chi Ku,Jann-Tay Wang,Ching-Wei Tsai,Vin-Cent Wu,Wen-Chien Chou 연세대학교의과대학 2010 Yonsei medical journal Vol.51 No.3
The clinical spectrum of infections caused by non-typhoid Salmonella spp. includes gastroenteritis, enteric fever,bacteremia, and extraintestinal localized complications, especially in immunocompromised hosts. Here we report a patient with severe aplastic anemia developing left iliopsoas abscess caused by non-typhoid Salmonella (NTS),which was successfully treated by prolonged antibiotic treatment and repeated debridement. Our data indicate that aplastic anemia is a risk factor for infection caused by NTS.
Evolution of Spin and Superorbital Modulation in 4U 0114+650
Chin-Ping Hu,Chi-Yung Ng,Yi Chou 한국우주과학회 2016 Journal of Astronomy and Space Sciences Vol.33 No.3
We report on a systematic analysis of the spin and superorbital modulations of the high-mass X-ray binary 4U 0114+650, which consists of the slowest spinning neutron star known. Utilizing dynamic power spectra, we found that the spin period varied dramatically during the RXTE ASM and Swift BAT observations. This variation consists of a long-term spin-up trend, and two ~1,000 day and one ~600 day random walk epochs previously, MJD 51,000, ~MJD 51,400-52,000, and ~MJD 55,100-56,100. We further found that the events appear together with depressions of superorbital modulation amplitude. This provides evidence of the existence of an accretion disk, although the physical mechanism of superorbital modulation remains unclear. Furthermore, the decrease of the superorbital modulation amplitude may be associated with the decrease of mass accretion rate from the disk, and may distribute the accretion torque of the neutron star randomly in time.
Chin-Ping Hu,Yi Chou,Ming-Chya Wu,Ting-Chang Yang,Yi-Hao Su 한국우주과학회 2013 Journal of Astronomy and Space Sciences Vol.30 No.2
We present the Hilbert-Huang transform (HHT) analysis on the quasi-periodic modulation of SMC X-1. SMC X-1, consisting of a neutron star and a massive companion, exhibits superorbital modulation with a period varying between ~40 d and ~65 d. We applied the HHT on the light curve observed by the All-Sky Monitor onboard Rossi X-ray Timing Explorer (RXTE) to obtain the instantaneous frequency of the superorbital modulation of SMC X-1. The resultant Hilbert spectrum is consistent with the dynamic power spectrum while it shows more detailed information in both the time and frequency domains. According to the instantaneous frequency, we found a correlation between the superorbital period and the modulation amplitude. Combining the spectral observation made by the Proportional Counter Array onboard RXTE and the superorbital phase derived in the HHT, we performed a superorbital phase-resolved spectral analysis of SMC X-1. An analysis of the spectral parameters versus the orbital phase for different superorbital states revealed that the diversity of nH has an orbital dependence. Furthermore,we obtained the variation in the eclipse profiles by folding the All Sky Monitor light curve with orbital period for different superorbital states. A dip feature, similar to the pre-eclipse dip of Her X-1, can be observed only in the superorbital ascending and descending states, while the width is anti-correlated with the X-ray flux.
ON THE COMPLEX VARIABILITY OF THE SUPERORBITAL MODULATION PERIOD OF LMC X-4
HU, CHIN-PING,LIN, CHING-PING,CHOU, YI,YANG, TING-CHANG,SU, YI-HAO,HSIEH, HUNG-EN,CHUANG, PO-SHENG,LIAO, NAI-HUI The Korean Astronomical Society 2015 天文學論叢 Vol.30 No.2
LMC X-4 is an eclipsing high-mass X-ray binary exhibiting a superorbital modulation with a period of ~ 30:5 days. We present a detailed study of the variations of the superorbital modulation period with a time baseline of ~ 18 years. The period determined in the light curve collected by the Monitor of All-sky X-ray Image (MAXI) significantly deviates from that observed by the All Sky Monitor (ASM) onboard the Rossi X-ray Timing Explorer (RXTE). Using the data collected by RXTE/ASM, MAXI, and the Burst Alert Telescope (BAT) onboard Swift, we found a significant period derivative, $\dot{P}=(2.08{\pm}0.12){\times}10^{-5}$. Furthermore, the O{C residual shows complex short-term variations indicating that the superorbital modulation of LMC X-4 exhibits complicated unstable behaviors. In addition, we used archive data collected by the Proportional Counter Array (PCA) on RXTE to estimate the orbital and spin parameters. The detected pulse frequencies obtained in small time segments were fitted with a circular orbital Doppler shift model. In addition to orbital parameters and spin frequency for each observation, we found a spin frequency derivative of $\dot{v}=(6.482{\pm}0.011){\times}10^{-13}Hz{\cdot}s^{-1}$. More precise orbital and spin parameters will be evaluated by the pulse arrival time delay technique in the future.
APPLICATIONS OF THE HILBERT-HUANG TRANSFORM ON THE NON-STATIONARY ASTRONOMICAL TIME SERIES
HU, CHIN-PING,CHOU, YI,YANG, TING-CHANG,SU, YI-HAO,HSIEH, HUNG-EN,LIN, CHING-PING,CHUANG, PO-SHENG,LIAO, NAI-HUI The Korean Astronomical Society 2015 天文學論叢 Vol.30 No.2
The development of time-frequency analysis techniques allow astronomers to successfully deal with the non-stationary time series that originate from unstable physical mechanisms. We applied a recently developed time-frequency analysis method, the Hilbert-Huang transform (HHT), to two non-stationary phenomena: the superorbital modulation in the high-mass X-ray binary SMC X-1 and the quasi-periodic oscillation (QPO) of the AGN RE J1034+396. From the analysis of SMC X-1, we obtained a Hilbert spectrum that shows more detailed information in both the time and frequency domains. Then, a phase-resolved analysis of both the spectra and the orbital profiles was presented. From the spectral analysis, we noticed that the iron line production is dominated by different regions of this binary system in different superorbital phases. Furthermore, a pre-eclipse dip lying at orbital phase ~0:6-0:85 was discovered during the superorbital transition state. We further applied the HHT to analyze the QPO of RE J1034+396. From the Hilbert spectrum and the O-C analysis results, we suggest that it is better to divide the evolution of the QPO into three epochs according to their different periodicities. The correlations between the QPO periods and corresponding fluxes were also different in these three epochs. The change in periodicity and the relationships could be interpreted as the change in oscillation mode based on the diskoseismology model.
High Power Density Asymmetrical Full-Bridge Soft-Switching Inverter
Pei-Chin Chi,Cheng-Yen Chou,Marojahan Tampubolon,Yao-Ching Hsieh,Jing-Yuan Lin,Huang-Jen Chiu 전력전자학회 2015 ICPE(ISPE)논문집 Vol.2015 No.6
This paper presents a Zero-Voltage-Switching (ZVS) technique eliminating the switching loss on a proposed single phase bi-directional full-bridge Buck inverter in which asymmetrical filter topology and control scheme are for each arm. Here Metal-Oxide-Field-Effect- Transistor(MOSFET) is chosen as the switching device, an L₁-C₁ filter is connected across the full-bridge, an L₂ filter is connected in series to load or grid. While the arm connecting with the C₁ is controlled by the polarity of 50Hz sinusoid reference command and the arm connecting with the L₁ is controlled by a Pulse-Width-Modulation(PWM) signal modulated by sinusoid, the L₁-C₁ then operates as an output filter of Buck, and the succeeding L₂ filter further attenuates ripple current flowing to load or grid. The ZVS technique sets the L₁ inductance such low that its current flows bi-directionally within a switching period, then the bidirectional current with sufficiently high peaks in turn charge and discharge the output capacitance Coss of MOSFETs of the switching arm within floating time, defined as the duration when both MOSFETs of an arm are off, to let the MOSFETs D-S channels be turned on or off at the state that Coss are fully discharged to zero voltage, so ZVS of MOSFET is achieved. Under the ZVS operation without frequency proportional switching loss, the switching frequency is possible to be raised to high to compact the sizes of passive components and heat sink of the inverter for achieving high power density. Simulation and experiment have been carried out to verify the ZVS operation.