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Differences in Complexion between Cold- and Heat-Prescription Groups in Sasang Medicine
Park, Young Joo,Do, Jun-Hyeong,Kim, Honggie,Kim, Jong Yeol Hindawi 2017 Evidence-based Complementary and Alternative Medic Vol.2017 No.-
<P>Sasang constitutional medicine (SCM) is a type of traditional Korean medicine (TKM) that classifies the human constitution into four types. The appearance of the complexion is one of the diagnostic factors of SCM but is rarely used in a quantitative and objective manner for diagnosis. In this study, an analysis using actual clinical data was conducted to assess the use of the complexion as a diagnostic element. A total of 528 Sasang medicine prescriptions from Korea Constitutional Multicenter Bank (KCMB) were classified into either a Cold-prescription group or a Heat-prescription group, and the complexion differences of the patients were analyzed using the <I>L</I><SUP>⁎</SUP><I>a</I><SUP>⁎</SUP><I>b</I><SUP>⁎</SUP> color space. After adjusting for age, BMI, and systolic blood pressure, significant differences were observed among the Cold- and Heat-prescription groups within each Sasang constitution. However, when the Sasang constitution was ignored, no significant difference was observed for either sex. This study quantitatively analyzed the complexion of patients, which is used as a diagnostic element in clinical practice. It is hoped that the results will contribute to objective medical treatments in the future, such as determining an appropriate herbal prescription based on the patient's complexion.</P>
박석윤,정기영,박래현,이낙영,이석훈,이주호,김주한,김홍기,김종우,조한석,정현용,김재문,한상익,전양환,이민선 충남대학교 기초과학연구소 1999 忠南科學硏究誌 Vol.26 No.2
With the correct equipment, microvolt EEG signals can be recorded from the scalp. Their potential use for diagnosis of physiological and psychiatric diseases and for increasing our understanding of cognitive processes is being realized by current research in many fields. Our work focuses on the research for good EEG signal representations and on careful analysis classification results using statistical EEG analysis(SEEG).
Park, Young Joo,Nam, Ji-Ho,Yim, Mi Hong,Kim, Honggie,Kim, Jong Yeol Hindawi 2017 Evidence-based Complementary and Alternative Medic Vol.2017 No.-
<P>Although the Cold-Heat Pattern is the most important diagnostic factor in Traditional Korean Medicine (TKM), its relationship to body temperature and subjective temperature has not been clearly revealed. In this study, based on clinical data from 551 patients, we classified patients treated with herbal medicines into a Cold-prescription group (CG) and a Heat-prescription group (HG), and we compared the ordinary symptoms between the two groups. Subjective body temperature was higher in the HG than in the CG (OR = 1.68, <I>p</I> < 0.01) and digestive ability was better in the HG than in the CG (expert's questionnaire, OR = 1.91, <I>p</I> < 0.001). However, objectively measured body temperature did not show any significant difference between the HG and CG in both gender groups (<I>p</I> = 0.383 and 0.181 for males and females, resp.). Our study suggests that the subjective body temperature and digestive ability may be the principal diagnostic elements of Cold-Heat Pattern identification by Korean Medicine Doctors. These findings may contribute to the investigation of an objective method to measure the Cold-Heat Pattern. </P>
Park, Kyutae,Woo, Kyoohee,Kim, Jongyoun,Lee, Donghwa,Ahn, Yumi,Song, Dongha,Kim, Honggi,Oh, Dongho,Kwon, Sin,Lee, Youngu American Chemical Society 2019 ACS APPLIED MATERIALS & INTERFACES Vol.11 No.16
<P>Conventional printing technologies such as inkjet, screen, and gravure printing have been used to fabricate patterns of silver nanowire (AgNW) transparent conducting electrodes (TCEs) for a variety of electronic devices. However, they have critical limitations in achieving micrometer-scale fine line width, uniform thickness, sharp line edge, and pattering of various shapes. Moreover, the optical and electrical properties of printed AgNW patterns do not satisfy the performance required by flexible integrated electronic devices. Here, we report a high-resolution and large-area patterning of highly conductive AgNW TCEs by reverse offset printing and intense pulsed light (IPL) irradiation for flexible integrated electronic devices. A conductive AgNW ink for reverse offset printing is prepared by carefully adjusting the composition of AgNW content, solvents, surface energy modifiers, and organic binders for the first time. High-quality and high-resolution AgNW micropatterns with various shapes and line widths are successfully achieved on a large-area plastic substrate (120 × 100 mm<SUP>2</SUP>) by optimizing the process parameters of reverse offset printing. The reverse offset printed AgNW micropatterns exhibit superior fine line widths (up to 6 μm) and excellent pattern quality such as sharp line edge, fine line spacing, effective wire junction connection, and smooth film roughness. They are post-processed with IPL irradiation, thereby realizing excellent optical, electrical, and mechanical properties. Furthermore, flexible OLEDs and heaters based on reverse offset printed AgNW micropatterns are successfully fabricated and characterized, demonstrating the potential use of the reverse offset printing for the conductive AgNW ink.</P> [FIG OMISSION]</BR>
Coherent control of 171Yb+ ion qubit states and thermometry using motional decoherence
Jeon Honggi,Park Nojun,Yu Jiyong,Kwon Yeong-Dae,염다현,Jhe Wonho 한국물리학회 2021 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.78 No.4
171Yb+ions were trapped in a quadrupole ion trap. A mode-locked pulse laser at 355 nm was used to generate a frequency comb to drive a Raman transition between the ground hyperfine qubit states of the Doppler cooled ion. Qubit transitions were driven in co-propagating and counter propagating laser beam geometries. In the co-propagating geometry, the coherence time and the fidelity of gate operations were obtained. By taking advantage of the phonon number sensitivity of the Rabi frequency in the counter-propagating geometry, we measured the center of mass temperature of the trapped ion near the Doppler limit which can be used for general thermometry in the ion trap experiment.
Kang, Boseok,Park, Namwoo,Lee, Jeonghwi,Min, Honggi,Choi, Hyun Ho,Lee, Hwa Sung,Cho, Kilwon American Chemical Society 2015 Chemistry of materials Vol.27 No.13
<P>This study systematically demonstrates the effects of the grain structure of crystalline self-assembled monolayers (SAMs) on the growth of organic semiconductor thin films on such monolayers, as well as the electrical characteristics of the resulting semiconductor films. The grain structure of the octadecyltrichlorosilane (OTS) monolayers could be tailored by constructing the monolayers at three different temperatures: -30 degrees C (-30 degrees C OTS), -5 degrees C (-5 degrees C OTS), and 20 degrees C (20 degrees C OTS). Among the three layers, -30 degrees C OTS exhibited the largest crystalline grains and longest-range homogeneity of alkyl chain arrays. We found that pentacene films deposited on -30 degrees C OTS monolayers show larger crystalline grains with higher degrees of crystallinity and lateral alignment compared to that of films deposited on -5 degrees C OTS or 20 degrees C OTS monolayers, following the surface characteristics of the underlying OTS monolayers. Furthermore, pentacene field-effect transistors fabricated with 30 degrees C OTS monolayers showed lower charge trap densities and higher field-effect mobility values than devices fabricated using 5 or 20 degrees C OTS monolayers. These results are explained in terms of enhanced quasi-epitaxial growth of pentacene films on OTS monolayers with large grains.</P>
Hyoungjong Wi,Honggi Park,Daehie Hong 한국자동차공학회 2020 International journal of automotive technology Vol.21 No.3
The time delay in heavy-duty vehicle platoons due to actuators, sensors, and communication delays has significant effects on platoon performance; it is difficult to immediately ascertain the driver’s intention due to the time delay, so that there is a restriction on the intra-platoon spacing and the platoon’s performance is weakened. This study proposes a platooning control system that uses pedal information from the lead vehicle to overcome the time delay problem. Distributed Model Predictive Control (DMPC) is also used for the longitudinal control of the heavy-duty vehicle platoon to effectively address the time delay problem. The acceleration of the lead vehicle was estimated by its pedal information and a nonlinear vehicle dynamics model. The estimated acceleration was transmitted to the following vehicles and used as faster control input to the DMPC. The feasibility of the DMPC system for a heavy-duty vehicle platoon was verified by co-simulation on MATLAB-TruckSim using real pedal hardware. The performance of the control system was evaluated by comparing the results of using estimated acceleration with the TruckSim data. Furthermore, the improved platooning performance was confirmed by measuring the spacing error between successive vehicles, a tracking error index, and traffic flow.