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( Kiseok Nam ),( Jiwoong Kim ),( Jiwon Park ) 대한물리치료학회 2020 대한물리치료학회지 Vol.32 No.1
Purpose: This study examined the effects of the right or left knee lift during push up plus in the quadruped position on the serratus anterior (SA) muscle activity. Methods: Twenty-one subjects (male 11, female 10) performed the quadruped position on push up plus. The muscle activities of the lower trapezius (LT), SA, and upper trapezius (UT) were measured by surface electromyography. Repeated measurements of one-way ANOVA were performed for statistical analysis of the data, and the criterion for statistical significance was set to p<0.05 and comparative analysis of the UT and SA ratio using a Paired t-test. Results: The right SA increased the muscle activity of the right knee lift during quadruped position push up plus (p<0.05). In particular, the right SA muscle activity was higher than the left. In addition, comparative analysis of the UT and SA ratio to the right knee lift during quadruped position push up plus was performed (p<0.05). The right was found to be a significant statistic compared to the left, but the left SA increased the muscle activity of the left knee lift during quadruped position push up plus (p<0.05). The left SA muscle activity was higher than right. In addition, comparative analysis of UT and SA ratio to the left knee lift during quadruped position push up plus was performed (p<0.05). The left was found to be a significance statistic than the right. In addition, the interaction effect between the groups showed significant differences (p<0.05). Conclusion: Knee lift during push up plus is recommended for the selective activation of a research exercise protocol of one side of the serratus anterior.
Intertemporal Behavior of Expected Market Returns : Time-Varying and Asymmetry Properties
Kiseok Nam,Chong Soo Pyun,Joshua Krausz 한국재무학회 2008 한국재무학회 학술대회 Vol.2008 No.05
The intertemporal behavior of expected market returns is not only driven by predictable market volatility, but also by unexpected volatility changes. Most of the empirical literature ignores the effects of unexpected volatility changes on the intertemporal relation; consequently, the previous empirical results suffer from the omitted variable bias. With the effects of a volatility shock incorporated in the estimation, we find a strong positive intertemporal relation. We also find that the quicker reversion of a negative return is attributable to a negative intertemporal relation. We interpret this negative intertemporal relation under a negative return shock as a reflection of strong optimistic expectations by investors on the future performance of stock prices.
A Study on R&D Support system Focused on Research Result
Kiseok Choi,sungjin Jhun,Young-Kuk Kim 한국콘텐츠학회 2009 ICCC International Digital Design Invitation Exhib Vol.2009 No.12
Measures the result of research work demand also is increasing with magnification of research and development financial investment size of the government. Respects this R& With the department which directness leads D will produce from research and development enterprising dimension and/about the result water continuously to collect a data constructing a DECIBEL simultaneously from national dimension and development DECIBEL will listen will integrate and is more important what to equip the network will be able to manage. From the present paper nation R& D subjects leads and is produced result information which efficiently and information circulation frame work will be able to apply collects, manages commonness constructs.
Kiseok Lee,Tan Li,Sanghyeon Baeg 대한전자공학회 2019 Journal of semiconductor technology and science Vol.19 No.4
In this paper, I/O timing margins are experimentally measured by DQS groups, for a DDR4 RDIMM with 2133 Mbps data rate, to study the margin effects of the special combination and sequence of random and fault-based deterministic data patterns. The most effective 94 data patterns are newly developed after experimentally investigating three test patterns factors, which consist of test algorithms, address directions, and data patterns; the most influential factor was data patterns, which resulted in the average margin reduction of 15.2%. The maximum of 11.8% margin was reduced by the proposed 94 patterns (in comparison to 28-bit PRBS pattern), which was from both selected PRBS and fault-based deterministic data patterns.
Kiseok Song,Unsoo Ha,Seongwook Park,Joonsung Bae,Hoi-Jun Yoo IEEE 2015 IEEE journal of solid-state circuits Vol.50 No.4
<P>A multi-modal spectroscopy IC combining impedance spectroscopy (IMPS) and multi-wavelength near-infrared spectroscopy (mNIRS) is proposed for high precision non-invasive glucose level estimation. A combination of IMPS and mNIRS can compensate for the glucose estimation error to improve its accuracy. The IMPS circuit measures dielectric characteristics of the tissue using the RLC resonant frequency and the resonant impedance to estimate the glucose level. To accurately find resonant frequency, a 2-step frequency sweep sinusoidal oscillator (FSSO) is proposed: 1) 8-level coarse frequency switching (f<SUB>STEP</SUB> = 9.4 kHz) in 10-76 kHz, and 2) fine analog frequency sweep in the range of 18.9 kHz. During the frequency sweep, the adaptive gain control loop stabilizes the output voltage swing (400 mV<SUB>p-p</SUB>). To improve accuracy of mNIRS, three wavelengths, 850 nm, 950 nm, and 1,300 nm, are used. For highly accurate glucose estimation, the measurement data of the IMPS and mNIRS are combined by an artificial neural network (ANN) in external DSP. The proposed ANN method reduces the mean absolute relative difference to 8.3% from 15% of IMPS, and 15-20% of mNIRS in 80-180 mg/dL blood glucose level. The proposed multi-modal spectroscopy IC occupies 12.5 mm 2 in a 0.18 μm 1P6M CMOS technology and dissipates a peak power of 38 mW with the maximum radiant emitting power of 12.1 mW.</P>
Polarizability of Carbon Nanotube Peapods from First-Principles
Kiseok Chang,윤영귀 한국물리학회 2008 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.52 No.3
Carbon nanotube peapods have been suggested as nanoelectronic devices, such as bucky shuttle memories and three-terminal switching devices. However, relevant physical properties are not fully understood. We calculate the polarizability of carbon nanotube peapods from first-principles. We obtain a substantial reduction in the polarizability of an endohedral C60 moledule in various carbon nanotube peapod structures. The reduction depends on the structures and the directions of the external electric fields. The features of polarizability will be important in device applications of carbon nanotube peapods.
Kiseok Song,Unsoo Ha,Jaehyuk Lee,Kyeongryeol Bong,Hoi-Jun Yoo IEEE 2014 IEEE journal of solid-state circuits Vol.49 No.1
<P>A bio-feedback iontophoresis controller IC is implemented into a fabric patch for transdermal drug delivery. An iontophoresis stimulator front-end (ISFE) can provide programmable stimulation current in the range of 16-512-μA amplitude, DC-500-Hz frequency, and 3% -100% duty cycle for controllable drug delivery. For safe and robust electrical stimulation, a failure detection circuit monitors the stimulation current to prevent overcurrent and stimulation voltage saturation. For bio-feedback operation, a dual-mode impedance sensor (DMIS) measures load and tissue impedances in the range of 5-50 kΩ and 5 Ω-1 kΩ, respectively. In the DMIS, the gain of a programmable gain amplifier and the injected current level of a chopper-modulated current source are automatically controlled to minimize power consumption. The proposed IC occupies 2.35 mm × 2.35 mm including pads in a 0.11-μm 1P6M CMOS technology and dissipates a peak power of 2.2 mW. The proposed IC is directly integrated on a 9 cm × 4 cm fabric circuit board together with a 6.2-mAh coin battery for convenient iontophoresis treatment. The proposed system provides a maximum dosage range of 87 mA·min, which is larger range than the 80- mA·min dosage range of a commercial iontophoresis patch. Using a reconfigurable tetra-polar electrode configuration, load and tissue impedances are measured during the iontophoresis treatment to provide bio-feedback. The proposed iontophoresis system is successfully verified by both in-vitro and in-vivo tests.</P>