VERTICAL PROPERTIES OF THE GLOBAL HAZE ON TITAN DEDUCED FROM METHANE BAND SPECTROSCOPY BETWEEN 7100 AND 9200Å

Sim, Chae-Kyung,Kim, Sang-Joon,Kim, Joo-Hyeon,Seo, Haing-Ja,Jung, Ae-Ran,Kim, Ji-Hyun The Korean Astronomical Society 2008 Journal of The Korean Astronomical Society Vol.41 No.3

We have investigated the optical properties of the global haze on Titan from spectra recorded between 7100 and $9200{\AA}$, where $CH_4$ absorption bands of various intensities occur. The Titan spectra were obtained on Feb. 23, 2005 (UT), near the times of the Cassini T3 flyby and Huygens probe, using an optical echelle spectrograph (BOES) on the 1.8-m telescope at Bohyunsan Observatory in Korea. In order to derive the optical properties of the haze as a function of altitude, we developed an inversion radiative-transfer program using an atmospheric model of Titan and laboratory $CH_4$ absorption coefficients available from the literature. The derived extinction coefficients of the haze increase toward the surface, and the coefficients at shorter wavelengths are greater than those at longer wavelengths for the 30 - 120 km altitude range, indicating that the Titanian haze becomes optically thin toward the longer wavelength range. Total optical depths of the haze are estimated to be 1.4 and 1.2 for the 7270 - $7360{\AA}$ and 8940 - $9150{\AA}$ ranges, respectively. Based on the Huygens/DISR data set, Tomasko et al. (2005) reported total optical depths of 2.5 - 3.5 at $8290{\AA}$, depending on the assumed fractal aggregate particle model. The total optical depths based on our results are smaller than those of Tomasko et al., but they partially overlap with their results if we consider a large uncertainty from possible variations of the $CH_4$ mixing ratio over Titan's disk. We also derived the single scattering albedo of the haze particles as a function of altitude: it is less than 0.5 at altitudes higher than ${\sim}150\;km$, and approaches 1.0 toward the surface. This behavior suggests that, at altitudes above ${\sim}150\;km$, the average particle radius is smaller than the wavelengths, whereas near the surface, it becomes comparable or greater.

A 0.12GHz-1.4GHz DLL-based Clock Generator with a Multiplied 4-phase Clock Using a 0.18um CMOS Process

Chi, Hyung-Joon,Lee, Jae-Seung,Sim, Jae-Yoon,Park, Hong-June The Institute of Electronics and Information Engin 2006 Journal of semiconductor technology and science Vol.6 No.4

A $0.12GHz{\sim}1.4GHz$ DLL-based clock generator with the capability of multiplied four phase clock generation was designed using a 0.18um CMOS process. An adaptive bandwidth DLL with a regulated supply delay line was used for a multiphase clock generation and a low jitter. An extra phase detector (PD) in a reference DLL solves the problem of the initial VCDL delay and achieves a fast lock time. Twice multiplied four phase clocks were generated at the outputs of four edge combiners, where the timing alignment was achieved using a coarse lock signal and the 10 multiphase clocks with T/8 time difference. Those four clocks were combined one more time using a static XOR circuit. Therefore the four times multiplication was achieved. With a 1.8V supply, the rms jitter of 2.1ps and the peak-to-peak jitter of 14.4ps were measured at 1.25GHz output. The operating range is $0.12GHz{\sim}1.4GHz$. It consumes 57mW and occupies 450*325um2 of die area.

구개열에서 비인두강의 생리해부학적 구조와 과비음과의 연관성 연구

조준희,표화영,최홍식,최병재,손흥규,심현섭 大韓小兒齒科學會 2004 大韓小兒齒科學會誌 Vol.31 No.4

비인강폐쇄란 연구개, 인두측벽 그리고 인두후벽간의 움직임이 서로 조화되어 구강과 비강을 나누어주는 괄약근 기전으로서 연하, 호흡, 발음 등의 생리적기능에 중요한 역할을 한다. 이 기능에 문제가 생긴 경우를 비인강폐쇄부전이라하며 그 원인으로는 (1) 연구개의 길이 및 움직임이상 (2) 비인두강의 해부학적 공간문제 (3) 인두 후벽과 측벽의 기능이상 등이 있다. 본 연구는 구개열 환자의 측면두부방사선계측사진을 통해 비인두강을 생리해부학적으로 분석하였으며 산출된 말소리의 과비음정도를 Nasometer로 평가하였다. 이로부터 얻은 정상군과 구개열환자군의 결과를 각각 비교하였으며, 비인강폐쇄부전과의 연관성을 알아보기 위하여 Anatomic VPI와 Nasalance score의 값을 비교분석하였다. 얻어진 결과는 다음과 같았다. 1. 측면두부방사선계측사진 결과, 연구개 길이, 연구개 두께, 비인강 깊이, 비인강 면적, Adequate ratio에서 두 그룹간 유의한 차이를 나타내었다. 2. Nasometer 결과. 모음/오/와 구강공명음문장, 구강장해음문장에서 두 그룹 간 유의한 차이를 나타내었다. 3. 구개열환자군에서 비인두강의 폐쇄부전 정도를 표현해주는 Anatomic VPI와 Nasalance score는 전반적으로 연관성이 없었다. 다만, 모음/이/와 일부 구강자음으로 이루어진 문장에서 다소의 상관성을 나타내었다. 결론적으로, 측면두부방사선계측사진과 Nasometer 각각의 검사결과에서 두 그룹간 유의한 차이를 찾아볼 수 있었으나, 구개열환자군내에서 비인강폐쇄부전을 표현하는 Anatomic VPI와 Nasalance score는 모음/이/와 구강자음을 포함한 문장을 제외하고는 전반적으로 연관성이 없었다. Velopharyngeal closure is a sphincter mechanism between the activities of the soft palate, lateral pharyngeal wall and the posterior pharyngeal wall, which divides the oral and nasal cavity. It participates in physiological activities such as swallowing, breathing and speech. It is called a velopharyngeal dysfunction when this mechanism malfunctions. The causes of this dysfunction are defects in (1) length, function, posture of the soft palate, (2) depth and width of the nasopharynx and (3) activity of the posterior and lateral pharyngeal wall. The purposes of this study are to analyze the nasopharynx of cleft palate patients using cephalometry and to evaluate the degree of hypernasality using nasometry to find its relationship with velopharyngeal dysfunction. The following results were obtained : 1. In cephalometry, there were significant differences in soft palate length, soft palate thickness, nasopharyngeal depth, nasopharyngeal area, and adequate ratio between two groups. 2. In nasometry, there were significant differences between two groups in vowel /o/ and sentences including oral consonants. 3. In cleft palate patients, though no general correlation was found between Anatomic VPI and nasalance scores, vowel /i/ and sentences including oral consonants were slightly correlated. In conclusion, cephalometry and nasometer results were significantly different between the two groups. Though in the cleft palate group. Anatomic VPI and nasalance scores, which are indices for velopharyngeal closure, excluding the vowel /i/ and sentences including oral consonants show generally no significance.

Cd 處理에 對한 박달나무의 家系間 生理的 被害 및 抗酸化 反應 差異

吳昌泳,李景俊,李在千,韓心熙 한국임학회 2004 한국산림과학회지 Vol.93 No.7

본 연구는 Cd 처리에 대한 박달나무 유묘의 가계 간 엽록소 함량과 효소홀성에 의한 피해 및 항산화 내성 반응의 특성을 구명하고자 실시하였다. Cd 처리는 3가계의 박달나무 1년생 묘목에 0, 04, 08mM CdSO₄·8/3H₂O 용액을 이용하여 3수준으로 2개월간 실시하였다. 박달나무의 가계간 및 처리 간 피해내성반응은 엽록소 함량과 MDA(malondialdehyde) 함량, 단백질 함량, SOD(supetoxide dismutase) 활성을 이용하여 결정하였다. Cd 처리는 박달나무의 잎 내 광색소의 함량비를 변화시켰으며, 생리적 피해 지표인 MDA 함량은 모든 가계의 Cd 처리구에서 대소구보다 높게 나타났다. 또한 모든 Cd 처리구의 단백질 함량은 대조구보다 높았으며, MDA 함량과 단백질 한량은 Cd 처리 농도가 증가함에 따라 증가하였다. 한편 Cd 처리된 박달나무의 잎 내 SOD 활성은 대조구보다 증가하였으나, 0.8mM Cd 처리된 9번 가계 경우는 대조구보다 낮아졌다. 즉 박달나무는 Cd 처리에 의해 광색소 함량의 변화 및 MDA 함량 증가와 같은 생리적인 피해를 나타냄과 동시에 단백질 함량과 SOD 활성 증가를 통해 내성 반응을 나타냈다. 그러나 이리한 생리적인 피해 및 내성 반응은 가계 간에 뚜렷하게 달랐다. We investigated differences among half-sib families of Betula schmidtii seedlings in the effect of three Cd levels on physiological injury and antioxidative reaction. One-year-old seedlings of B. schmidtii were treated with 0, 0.4 and 0.8mM CCdSO₄·8/3H₂O for two months. Physiological injury and antioxidative reaction to three levels of Cd treatment determined with using photosynthetic pigments, MDA, protein contents, and SOD activity in the leaves of three half-sib families of B. schmidtii. The ratios of contents among photosynthetic pigments in the leaves of B. schmidtii were changed by Cd treatment. In additon, MDA content in the leaves of plants under Cd stress increased relative to control plants, and total protein content was also higher in the leaves of 0.4mM and 0.8mM Cd levels than control plants. The contents of MDA and total protein also increased with increasing the concentrations of Cd treatment. SOD activity in the leaves of three half-sib families increased by Cd treatment, but SOD activity of No. 9 family decreased relative to control plants at 0.8mM Cd level. In our trial, B. schmidtii treated with Cd represented physiological injuries such as the changes of photosynthetic pigments ratio and the increase of MDA content. At the same time, B. schmidtii showed tolerance responses against Cd toxicity through increasing the total protein content and SOD activity. But the physiological injury and tolerance responses were significantly different among three half-sib families exposed to 0.4mM and 0.8mM Cd.

Synthetic Heat-labile Enterotoxin B Subunit and Hemagglutinin-neuraminidase Neutralizing Epitope Fusion Protein from Tobacco Chloroplasts as a Candidate of Plant-based Edible Vaccines against Newcastle Disease Virus

Joon-Soo Sim,Hyo-Kyung Pak,Yong-Hwan Kim,Bum-Soo Hahn 한국원예학회 2008 한국원예학회 기타간행물 Vol.- No.-

Quantitative analysis of anthraquinone compounds from Senna tora seeds at different ripening stages

Joon-Soo Sim,Soo-Ji Choi,Ji-Seon Kim,In-Jin Ha,Chang-Muk Lee,Bum-Soo Hahn 한국당과학회 2016 한국당과학회 학술대회 Vol.2016 No.07

Senna tora (Cassia tora), a member of Leguminosae, is widely distributed in south-east Asian countries. The dried or roasted seed of Senna tora has been used as one of Oriental medicines for centuries for vision-improving, anti-asthenia and diuretic. Furthermore, many reports related to various biological and pharmacological activities of Senna tora have been published such as anti-inflammatory, anti-hepatotoxic, radical scavenging, anti-allergic, anti-mutagenic, antipyretic, hypoglycemic, anti-fungal and anti-bacterial effects. In this study, we have focused on characterizing and quantifying of anthraquinone compounds from Senna tora seeds during different ripening stages. Ultra-high performance liquid chromatography coupled with diode array detector and electrospray ionization quadrupole time-of-flight tandem mass spectrometry (UHPLC-DAD-ESI-Q-TOF-MS) was used to investigate the compositional changes of anthraquinone compounds that were involved in ripening of Senna tora seeds. Furthermore, non-targeted UHPLC-ESI-Q-TOF-MS data were subjected to principal component analysis and discriminant analysis to find the potential characteristic components from different ripening stages of Senna tora seeds.

Inhibition of Helicobacter pylori adhesion to Kato III cells by intact and low molecular weight acharan sulfate

Sim, Joon-Soo,Hahn, Bum-Soo,Im, A-Rang,Park, Youmie,Shin, Ji-Eun,Bae, Eun-Ah,Kim, Dong-Hyun,Kim, Yeong Shik Springer-Verlag 2011 Glycoconjugate journal Vol.28 No.6

Poster Session : PS 0031 ; Cardiology : Different Impact of Stress Hyperglycemia Defi ned by Random or Fasting Blood Glucose in Non-Diabetic Patients with Acute Myocardial Infarction Who Undergoing Percutaneous Coronary Intervention

( Joon Ho AHN ),( Min Chul KIM ),( Jae Yeong CHO ),( Hae Chang JEONG ),( Ki Hong LEE ),( Keun Ho PARK ),( Doo Sun SIM ),( Nam Sik YOON ),( Hyun Joo YOON ),( Kye Hun KIM ),( Young Joon HONG ),( Hyung W 대한내과학회 2014 대한내과학회 추계학술대회 Vol.2014 No.1

Background: There is limited data which compared clinical outcomes of stress hyperglycemia (SH) defi ned by random glucose (RG) and fasting blood glucose (FBG). Methods: A total of 1364 non-diabetic patients whose HbA1c <6.5% in the COREAAMI (The COnvergent REgistry of cAtholic and chonnAm university for Acute MI) registry were analyzed. All enrolled patients received PCI and were divided into two groups by initial glucose level for each RG and FBG: SH and normoglycemia group (188 [RG = 180 mg/dl] and 1176 patients [RG < 180 mg/dl] by RG; and 720 [FBG = 126 mg] and 644 patients [FBG < 126 mg/dl] by FBG). The primary outcome was all-cause mortality, and we also investigated the incidence of cardiac death, nonfatal MI, any revascularization and stroke during 4 years after AMI. Results: A total of 648 patients (47.5%) were checked FBG after PCI, and remained 716 patients checked FBG before PCI. When SH was defi ned by RG, in-hospital mortality (0.7% vs. 2.7%, p=0.024), all-cause mortality (hazard ratio [HR] 1.83, 95% confidence interval [CI] 1.33-2.52, p <0.001) and cardiac mortality (HR 2.72, 95% CI 1.75-4.22, p <0.001) were higher in SH group. However, there were no signifi cant differences in in-hospital mortality (0.6% vs. 1.3%, p=0.274), all-cause mortality (HR 1.21, 95% CI 0.93-1.58, p=0.160) and cardiac mortality (HR 1.32, 95% CI 0.88-1.99, p=0.175) between SH and normoglycemia group when SH was defi ned by FBG. The incidences of nonfatal MI, any revascularization and stroke were not signifi cantly different between the groups by both RG and FBG defi nition. Conclusions: SH was associated with higher mortality compared to patients with normoglycemia in non-diabetic AMI patients when only defi ned by RG, not FBG.

A Feasibility Study on a Robotic Exercise System for MDOF Physical Rehabilitation Therapy

Sim, Hyung Joon,Won, Joo Yeon,Han, Chang Soo The Korean Society of Mechanical Engineers 2004 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.18 No.11

This paper presents a robot system developed for medical purpose. A 6-degree-of-freedom robot was introduced for physical exercise and rehabilitation. This system was proposed for stroke patients or patients who cannot use one of their arms or legs. The robot system exercises the hemiplegic part based on the motion of normal part of a patient. Kinematic studies on the human body and robot were applied to develop the robotic rehabilitation exercise system. A clamp which acts as an end effector of the robot to hold a patient was designed and applied to the robot to guarantee the safety of patients. The proposed robotic rehabilitation system was verified by simulations and experiments on arm (elbow and shoulder) motion. Patients are expected to be able to exercise various motions by themselves with the proposed robotic rehabilitation system.

Characteristics of Polycrystalline SrRuO[sub 3] Thin-Film Bottom Electrodes for Metallorganic Chemical-Vapor-Deposited Pb(Zr[sub 0.2]Ti[sub 0.8])O[sub 3] Thin Films

Sim, Joon Seop,Zhao, Jin Shi,Lee, Hyun Ju,Lee, Keun,Hwang, Gyu Weon,Hwang, Cheol Seong The Electrochemical Society 2006 Journal of the Electrochemical Society Vol.153 No.11