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SooJung So,HeonJeong Lee,SeungGul Kang,ChulHyun Cho,HoKyoung Yoon,Leen Kim 대한신경정신의학회 2015 PSYCHIATRY INVESTIGATION Vol.12 No.2
Objective-To investigate the personality characteristics of patients with upper airway resistance syndrome (UARS) and those of patients with obstructive sleep apnea syndrome (OSAS). Methods-Eighty-eight patients with UARS and 365 patients with OSAS participated. All patients had a diagnostic full-night attended polysomnography (PSG) and completed the Athens Insomnia Scale (AIS), Pittsburgh Sleep Quality Index (PSQI), Epworth Sleepiness Scale (ESS), Symptom Checklist-90-Revision (SCL-90-R) and Eysenck Personality Questionnaire (EPQ). Results-The UARS group scored significantly higher than the OSAS group on the ESS, AIS, and PSQI (p<0.001). The scores of all SCL-90-R subscales in the UARS group were significantly higher than those in the OSA group (all p<0.001, except for somatization, p=0.016). Patients with UARS scored lower on EPQ-E (extroversion/introversion) (p=0.006) and EPQ-L (lie) (p<0.001) than those with OSA. UARS patients also showed higher scores on EPQ-P (psychoticism) (p=0.002) and EPQ-N (neuroticism) (p<0.001) than OSAS patients. Conclusion-Our results suggest that patients with UARS have worse subjective sleep quality than OSAS patients in spite of their better PSG findings. UARS patients tend to have more neurotic and sensitive personalities than patients with OSAS, which may be a cause of the clinical features of UARS.
습곡-충상단층대 진화 모형에서 기반암의 탄성계수에 따른 구조 양상 : 2차원 이산요소법을 이용하여
안수정(Soojung An),소병달(Byung-Dal So) 대한지질학회 2021 대한지질학회 학술대회 Vol.2021 No.10
최근 입상 물질의 흐름 모사에 적합한 이산요소법이 취성-소성변형이 일어나는 습곡-충상단층대모형 제작에 활발히 도입되고 있다. 본 연구는 이산요소법을 통해 습곡-충상단층대모형을 제작하고 기반암의 탄성계수에 따른 구조 변화를 관찰하였다. 이산요소법의 계산 영역은 불균일한 분포의 독립 입자로 구성되며 탄성 스프링을 매개로 접촉 되어 있다. 입자 간 탄성 스프링에 인장력 및 전단력 등 외부 응력이 가해져 스프링의 탄성 한계를 초과할 경우 연결이 파괴되고 비 접촉 상태에 놓인다. 지질학, 자원공학, 지구물리학 등 분야에서는 이산요소법의 이러한 성질을 취성 및 소성 변형으로 고려하여 파열, 단층, 습곡 등 불연속한 변위를 보이는 변형 모사에 사용되고 있다. 따라서 본 연구는 이산요소법을 이용하여 2차원 토조압축모형을 제작하고 Buiter et al . (2006)과 비교하여 신뢰성이 높은 습곡-충상단층대모형을 개발하였다. 또한 퇴적물을 대변하는 입자 간 스프링의 탄성 계수에 따른 변형구조(예, 습곡, 단층)의 발생 양상을 관찰하였다. 입자 간 스프링의 높은 탄성계수는 항복 강도가 높아 쉽게 파괴에 이르지 않음을 의미한다. 이에 따라 상대적으로 높은 탄성계수의 습곡-충상단층대모형에서는 단층 보다 습곡의 발생 비율이 증가하였고 낮은 탄성계수에서는 습곡의 발생비율에 비해 단층의 발생 비율이 상승하였다. 본 연구는 이산요소법을 통해 구성한 습곡충상단층대모형에서 입자 간 접촉 스프링의 탄성 계수에 따른 구조적 변화를 확인하였으며, 이를 통해 미시 규모의 탄성 계수와 거시 규모의 취성 및 소성 변형 양상 간 관계를 제시하였다.
영어 문장 내 상이한 위치에 나타난 저성조 피치 액센트 연구
이서배(Yi So Pae),김수정(Kim Soojung) 한국음성학회 2011 말소리와 음성과학 Vol.3 No.4
Recent studies on English L<SUP>*</SUP> (low pitch accent) have revealed the difference of changes in acoustic manifestation between utterances produced by Koreans and those produced by native speakers of English. However, not much effort has been made to compare L<SUP></SUP>* focused constituents and non-focused constituents. At the same time, most previous works on focus realization are lacking in terms of normalization of acoustic measurement. Therefore, this research is dedicated to comparing the L<SUP>*</SUP> focused items and non-focused items realized by Koreans and Americans and to examining the realization of English L<SUP>*</SUP> produced by the two language groups with improved normalization of the acoustic features (F0, intensity and duration). Within-group analysis comparing focused words and non-focused words showed both Americans and Koreans prolonged the L<SUP>*</SUP> focused syllables but the effect size of syllable lengthening made by Koreans was far less than that made by Americans. Furthermore, significant F0 lowering was found in Americans but not in Koreans. However, the effect of intensity change caused by L<SUP>*</SUP> focus was not significant within each group. The effect of focused words was tested between the two groups revealing that Koreans implemented English L<SUP>*</SUP> focus with higher F0, lower intensity and shorter duration than Americans. In the instances in which a significant Group x Focus Location (initial, middle and final of a sentence) interaction was found, further analysis testing the effect of Group on each Focus Location was conducted. The testing showed that the Koreans produced shorter syllables at initial and middle of a sentence and higher F0 at initial of a sentence than Americans. Implications for the intonation training were also discussed.
Just-In-Time 컴파일러를 이용한 파이썬 기반 지구동역학 코드 가속화 연구
박상진 ( Sangjin Park ),안수정 ( Soojung An ),소병달 ( Byung-dal So ) 한국지구물리·물리탐사학회 2021 지구물리와 물리탐사 Vol.24 No.2
As the execution speed of Python is slower than those of other programming languages (e.g., C, C++, and FORTRAN), Python is not considered to be efficient for writing numerical geodynamic code that requires numerous iterations. Recently, many computational techniques, such as the Just-In-Time (JIT) compiler, have been developed to enhance the calculation speed of Python. Here, we developed two-dimensional (2D) numerical geodynamic code that was optimized for the JIT compiler, based on Python. Our code simulates mantle convection by combining the Particle-In-Cell (PIC) scheme and the finite element method (FEM), which are both commonly used in geodynamic modeling. We benchmarked well-known mantle convection problems to evaluate the reliability of our code, which confirmed that the root mean square velocity and Nusselt number obtained from our numerical modeling were consistent with those of the mantle convection problems. The matrix assembly and PIC processes in our code, when run with the JIT compiler, successfully achieved a speed-up 30× and 258× faster than without the JIT compiler, respectively. Our Python-based FEM-PIC code shows the high potential of Python for geodynamic modeling cases that require complex computations.
Sung-Kug Park,Meehye Kim,You Sub Sho,So Young Chung,Soojung Hu,Jong Ok Lee,Moo Ki Hong,Myung Chul Kim,Ju Seop Kang,Ok Hwa Jhee 한국식품과학회 2007 Food Science and Biotechnology Vol.16 No.6
The microbiological and chemical identification of antibiotic residues was attempted for livestock and seafood products including pork (n=34), beef (n=34), chicken (n=32), flatfish (n=37), armorclad rockfish (n=36), and sea bream (n=27). The meat (n=100) and seafood (n=100) samples were collected from 9 markets in 5 major Korean cities. Antibiotic substances were identified from the classes of tetracyclines, macrolides, penicillins, aminoglycosides, polyethers, peptides, sulfonamides, quinolones, chlorampenicols, and novobiocins using a microbiological assay, the Charm II test and high performance liquid chromatography (HPLC) with ultra violet (UV) and fluorescence detectors. The results showed that 2 tetracyclines (oxytetracycline and tetracycline) and 3 quinolones (ciprofloxacin, norfloxacin, and enrofloxacin) were detected in 4 samples of flatfish among all 100 seafood samples tested. No antibiotic residues were detected in the 100 livestock product samples tested. The amounts (min-max, mg/kg) of the residual antibiotics were as follows; tetracycline 0.78-0.85, oxytetracycline 0.49-0.74, ciprofloxacin 0.09-0.83, norfloxacin 0.01-0.21, enrofloxacin 0.12-2.98. These data indicate that the total detection rate of antibiotics in livestock and seafood products was approximately 2%.