불안을 동반한 주요우울장애 환자에 대한 뇌파 알파 비대칭의 특성 연구

이준석,양병환,이소희,이승민,Lee, Jun-Seok,Yang, Byung-Hwan,Lee, So Hee,Lee, Seung-Min 대한생물정신의학회 2007 생물정신의학 Vol.14 No.1

Objectives : Studies have reported differences between depressed adults and controls in quantitative measures of EEG alpha asymmetry, but, there are few using Korean subjects. So, the present study compared EEG regional alpha asymmetries of patients having major depressive disorder(MDD) and normal controls. Methods : The subjects in this study were 11 unmedicated unipolar depressed patients and 11 non-depressed, age matched controls. Resting EEG(eyes closed and eyes open) was recorded from each participant using 8 scalp electrodes. Beck Depression Inventory(BDI), 17-item Hamilton Depression Rating Scale(HDRS), Zung's Self-Rating Depression Scale(SDS) and Spielberger's State-Trait Anxiety Inventory(STAI) were used to evaluate depression and anxiety symptoms. Results : The severities of depression measured by self-report questionnaires were positively associated with those of anxiety(state and trait) ; The subjects were both anxious and depressed. Anxious-depressed patients differed from controls in alpha asymmetry at T4 channels. They showed evidence of greater activation over right than left temporal site. Conclusion : These findings are consistent with the previousely reported alpha asymmetry of depressed patients with an anxiety disorder. The failure to find the evidence of reduced right parietal activity in depression is presumed to be due to opposing effects of comorbid anxiety on parietotemporal activity.

경항통 환자에 있어서 경추의 전만 감소와 영상의학검사 소견상의 연관성 분석

이준석,이슬지,김은석,한경완,우재혁,김상주,이한,김창연,Lee, Joon-Seok,Lee, Seul-Ji,Kim, Eun-Seok,Han, Kyung-Wan,Woo, Jae-Hyuk,Kim, Sang-Joo,Lee, Han,Kim, Chang-Youn 척추신경추나의학회 2010 척추신경추나의학회지 Vol.5 No.2

Objectives : The propose of this study was to observe the correlation between Cervical hypolordosis and radiological result. Methods : We randomly selected among the 110 patients with X-ray and C-spine MRI films who have visited Jaseng Hospital of Oriental Medicine with neck pain. Radiographic measures of cervical lordosis and herniated disc were collected, and statistically analyzed. Results : In this study, if the finding of a X-ray showed straightening of cervical lordotic curve, based on MRI finging, the amount of herniation was more severe. Conclusions : There was a significant correlation between Cervical hypolordosis and herniated disc. Hypolordosis group complained a severe herniated disc.

침투 및 할렬주입에 의한 지반보강 효과에 관한 연구

이준석,이인모,정형식,이대수,Lee, J.S.,Lee, I.M.,Chung, H.S.,Lee, D.S. 한국터널지하공간학회 2003 터널기술 Vol.5 No.4

본 연구에서는 절리를 포함한 터널주변 암반의 안전성 강화 및 지하수 유입 억제공으로 사용되는 침투그라우팅에 대한 모형화 기법을 제시하고 관련 매개변수 해석을 실시하였다. Bingham 모형을 적용한 시멘트 그라우팅재는 정상류 흐름으로 가정하여 해석의 편의를 도모하였으며 UDEC을 이용한 해석결과, 절리의 두께 및 주입압이 침투그라우팅에 의한 확산범위를 결정짓는 주요 변수임을 확인하였다. 침투그라우팅 모형을 근간으로 할렬그라우팅 해석을 위한 수치모형을 제안하였으며 암반의 인장강도와 점착력이 할렬의 주요변수임을 입증하였다. 한편, 주입후 지반보강효과를 정량적으로 검토하기 위하여 직교 이방성 물성을 계산할 수 있는 알고리즘을 제시하였으며 이 결과 주입후 약 3~4배 정도의 강성도 증진효과를 확인하였다. 향후 본 연구결과는 그라우팅재 주입에 의한 투수계수 저감효과 혹은 지하수 억제공법 등의 설계기법에 적용될 수 있으며 관련 실험도 수행될 예정이다. A practical modeling approach has been proposed in this study to better understand the behavior of penetration grouting which is normally applied to the jointed rock masses to increase the bearing capacity and to reduce the ground water flow into the tunnel. Based on Bingham model together with a steady-state flow of the grout, penetration model is simulated in the commercial package called UDEC and, injection pressure as well as joint thickness are found to be the main parameters to determine the range of grout spread. Another numerical model on fracturing grouting is also suggested and, in this case, the tensile strength as well as cohesion of the rock masses are proven to be the major factors to decide the fracturing mechanism of the rock masses. The reinforcement effect of the grout-reinforced rock masses is calculated from the suggested algorithm on orthotropic material model and it is found that the directional stiffness of reinforced rock masses is increased up to 3 to 4 times compared with original jointed rock masses. Future work will be concentrated on the water control around the tunnel by the grout injection and a model test will also be performed to verify the suggested methods developed in this study.

PDA를 이용한 터널막장면 정보처리시스템 개발

이준석,이현석,김종규,이상수,Lee, J.S.,Lee, H.S.,Kim, J.G.,Lee, S.S. 한국터널지하공간학회 2005 터널기술 Vol.7 No.1

사회 전반에 걸친 디지털 혁명에 따라 IT를 기반으로 하는 다양한 정보화 터널시공기법이 개발되고 있으며 터널시공시 의사결정체계의 일환으로 적용되고 있다. 따라서 본 연구에서는 PDA를 이용한 터널시공의 정보화에 대하여 기술하였으며, 특히 시공중 발생하는 각종 막장면 데이터를 실시간으로 입 출력 및 저장하고 이를 기반으로 지보패턴을 결정할 수 있는 의사결정체계를 구축하였다. 이를 위하여 무선 네트워크, 이동식 컴퓨터, CDMA 및 디지털카메라 등 최근 정보통신을 바탕으로 한 막장면 매핑자료의 실시간 데이터 수집 및 해석, 디지털 매핑등이 가능한 PDA용 S/W를 개발하였으며 현장적용에 대하여 고려하였다. 향후에는 실제 시공시 사용된 지보방법 및 소요 지보량을 함께 저장할 수 있는 DB를 구축하는 한편 현장적용을 통한 feedback 결과에 대하여 연구가 지속될 예정이다. Due to fast development of digital equipments, various information techniques have been applied to the tunneling and a decision aid system based on IT has also been used during excavation stage. A PDA based informative tunneling method is, therefore, studied in this paper and the decision aids for tunneling using digital face mapping data as well as geologic information in terms of digital data is developed. For this, wireless network, mobile computer, CDMA and digital camera have been combined to generate the digital map of the tunnel face and reinforcement or excavation pattern can be estimated based on digitalized geologic conditions. Future studies will be concentrated on the enhancement of the PDA S/W so that reinforcement method as well as the amount of reinforcements can also be stored in the same DB. Furthermore, field application of the S/W will be undertaken and a virtual reality technique will also be introduced to visualize all the tunneling work on the computer monitor.

불안 장애 환자에서 바이오피드백 훈련과 약물치료의 병합 효과 분석 - 임상 특성을 중심으로 -

이준석,오동열,엄수형,소윤섭,전진용,Lee, Jun-Seok,Oh, Dong-Yul,Eom, Su-Hyung,So, Yoon-Seop,Jun, Jin-Yong 대한불안의학회 2006 대한불안의학회지 Vol.2 No.2

Objectives : This study aimed to investigate the therapeutic effect of combined biofeedback training with pharmacotherapy for patients with anxiety disorder. Methods : 12 patients with panic disorder and generalized anxiety disorder were enrolled this study. They were tested for State Trait Anxiety Inventory-State (STAI-S), State Trait Anxiety Inventory-Trait (STAI-T), Beck's Depression Inventory (BDI) and Symptom CheckList-90-Revision Somatization (SCL-90-R-SOM) before and after the biofeedback training program. Results : The score of STAI-T (p=0.023) and BDI (p=0.0018) were the significantly decreased after the biofeedback training program. In Female group, the score of STAI-T (p=0.028), STAI-S (p=0.028) and BDI (p=0.009) were significantly decreased after the biofeedback training program. In the group which age is lower than 40 years old, the score of BDI (p=0.046) were significantly decreased after the biofeedback training program. In Panic disorder group, the score of STAI-S (p=0.046) were significantly decreased after the biofeedback training program. Conclusion : The result of this study is useful for the treating the anxiety disorder patients using the biofeedback training program.

지오그리드 복합 배수재를 이용한 터널 배수성능 개선에 관한 실험적 연구

이준석,최일윤,임지훈,윤석철,Lee, Jun S.,Choi, Il-yoon,Lim, Jihoon,Yoon, Suk Chul 한국터널지하공간학회 2016 한국터널지하공간학회논문집 Vol.18 No.1

본 연구에서는 철도터널의 배수재로 사용되는 부직포의 배수 특성을 정밀하게 조사하기 위하여 실제 터널 시공현장과 유사한 경계조건 및 하중조합을 가진 실험장비를 고안하였다. ASTM D4716과 유사한 성능을 갖는 실험장비는 숏크리트 및 방 배수재와 콘크리트 경계면의 굴곡을 현장 조건과 유사하게 구현할 수 있으며 관련 시방조건 만족유무에 따른 실험결과로부터 일반 배수재의 성능을 규명하였다. 또한 배수성능 개선을 위하여 부직포 사이에 지오그리드를 삽입한 혼합형 배수재를 사용한 경우와 일반 배수재에 대한 실험결과로부터 혼합형 배수재의 배수성능 및 적용방안에 대하여 고찰하였다. A new testing equipment is designed to investigate the characteristics of the drainage fabric which is used in the tunnel drain system. The equipment is possible to model the loading as well as boundary conditions of the shotcrete precisely and it follows the general guideline of ASTM D4716 so that the interface between shotcrete and concrete lining retains the real situation in the tunnel site. Using the real loading conditions and surface irregularities, the flow rate and its capacity of the regular fabric has been estimated. A composite drainage fabric having geogrid inside was also used to investigate the flow rate and its efficiency. The advantages of the composite fabric compared with the regular one have been demonstrated using the experimental data and brief outline of the future work is finally proposed.

분산 음성 인식 시스템을 위한 특징 계수 양자화 방식 설계

이준석,윤병식,강상원,Lee Joonseok,Yoon Byungsik,Kang Sangwon 한국음향학회 2005 韓國音響學會誌 Vol.24 No.4

본 논문에서는 분산 음성 인식 시스템에서 사용되는 멜켑스트럼 계수를 양자화 하기 위하여 예측 구조를 갖는 BC-TCQ 양자화기를 제안하였다. 분산 음성 인식 시스템을 위한 효율적인 멜켑스트럼 계수 양자화기를 설계하기 위하여, 인접 프레임간의 높은 상관도를 이용한 1차 AR 예측 필터를 적용하였다. 그리고 예측 필터에 의해서 구해지는 예측 에러 벡터는 BC-TCQ를 사용하여 양자화를 수행하였다. 본 연구에서 제안된 예측 BC-TCQ멜켑스트럼 계수 양자화기는 분산 음성 인식 시스템을 위해 ETSI 규격에서 사용되는 split VQ 멜켑스트럼 계수 양자화 방식보다 cepstral distortion (CD) 측면에서 훨씬 좋은 성능을 보이며, 인코딩 연산 복잡도 및 메모리 요구량에서도 더 유리하다. In this paper, we propose a predictive block constrained trellis coded quantization (BC-TCQ) to quantize cepstral coefficients for the distributed speech recognition. For Prediction of the cepstral coefficients. the 1st order auto-regressive (AR) predictor is used. To quantize the prediction error signal effectively. we use a BC-TCQ. The performance is compared to the split vector quantizers used in the ETSI standard, demonstrating reduction in the cepstral distance and computational complexity.

다절점 케이블요소를 이용한 외부 긴장된 강구조 시스템의 기하학적 비선형해석

이준석,김문영,한만엽,김성보,김낙경,Lee, Jun Seok,Kim, Moon Young,Han, Man Yop,Kim, Sung Bo,Kim, Nak Kyung 한국강구조학회 2006 韓國鋼構造學會 論文集 Vol.18 No.6

본 논문에서는 선행논문(김 등, 2005)을 확장하여 다절점 케이블요소를 포함하는 보-기둥 요소의 기하학적 비선형성에 대해서 논의하기로 한다. 먼저 이를 위해서Hermitial 다항식을 형상함수로 채택하고 보-기둥요소의 2차 효과를 포함하는 접선강도행렬에 다절점 케이블-트러스 요소에 대한 접선강도 행렬을 추가하여 전체좌표계에 대한 접선강도행렬을 구성하고 하중증분법에 의한 유한요소 해석과정을 제시한다. 이렇게 새로이 개발된 다절점 케이블-트러스 요소를 포함하는 뼈대 구조물의 기하학적 비선형성과 그 타당성을 검증하기 위하여 IPS(Innovative Prestressed Support) 시스템의 기하학적 비선형 해석을 실시하고 이의 결과를 선형탄성해석의 결과와 비교한다. In this paper, a geometric nonlinear analysis procedure of the beam-column element including multi-noded cable element in extension of companion paper (Kim et al., 2005) is presented. First, a stiffness matrix was derived about the beam-column element that considers the second effect of the initial force supposing the curved shape at each time-step, with Hermitian polynomials as the shape function. Second, the multi-noded cable element was also subjected to the tangent stiffness matrix. To verify the geometric nonlinearity of this newly developed multi-noded cable-truss element, the Innovative Prestressed Support (IPS) system using this theory was analysed by geometric nonlinear method and the results were compared with those produced by linear analysis.

한방병원에 내원한 위마비 및 비위마비성 기능성 소화불량증 환자에 대한 위 운동성 및 임상적 속성에 관한 연구

이준석,이선령,엄국현,김현경,장선영,유종민,김진성,류봉하,류기원,윤상협,Lee, Joon-Suk,Lee, Seon-Young,Eom, Guk-Hyeon,Kim, Hyun-Kyung,Jang, Sun-Young,Ryu, Jong-Min,Kim, Jin-Sung,Ryu, Bong-Ha,Ryu, Ki-Won,Yoon, Sang-Hyub 대한한방내과학회 2005 大韓韓方內科學會誌 Vol.26 No.4

Little is known concerning the pathophysiology and symptomatology of gastric dysmotility of patients who have sought treatment in eastern traditional medicine. The aim of this study was to investigate gastric electrical activity and clinical characteristics between gastroparesis and non-gastroparetic functional dyspepsia(FD) and assess the necessity to distinguish them for eastern traditional medical treatment. 60 patients were surveyed by questionnaire. Gastric electrical activity was recorded and analyzed using electrogas-trography. Patients were divided into gastroparesis and non-gastroparetic FD by 1.0 of power ratio. Healthy persons were used as reference. Postprandial normogastria of gastroparesis decreased and that of non-gastroparetic functional dyspepsia increased compared before and after meals. Suggested causes of onset were the meat diets that most patients were on in the gastroparesis group, and that drugs that patients in the non-gastroparetic FD group were taking. Distribution of main symptom was equally regular in patients with gastroparesis, but patients with non-gastroparetic FD showed mainly upper abdominal pain and fullness. Values for the gastroparesis group were double those for the non-gastroparesis FD group in frequency of upper GI endosopic examination. Results suggest that effective application of eastern traditional medical treatment requires that first a clear distinction be made in state of gastric dysmotility and clinical characteristics of gastroparesis and non-gastroparesis FD when treating dyspepsia.

고양이 동맥성 혈전색증의 처치

이준석,현창백,Lee, Jun-Seok,Hyeon, Chang-Baek 대한수의사회 2006 대한수의사회지 Vol.42 No.9