Cone beam형 전산화단층영상을 이용한 하악과두 위치의 연구

황형주,김규태,최용석,황의환 대한구강악안면방사선학회 2006 Imaging Science in Dentistry Vol.36 No.2

Purpose : To evaluate position of the mandibular condyle within articular fossa in an asymptomatic population radiographically by a cone beam computed tomography. Materials and Methods : Cone beam computed tomography of 60 temporomandibular joints was performed on 15 males and 15 females with no history of any temporomandibular disorders, or any other orthodontic or prosthodontic treatments. Position of mandibular condyle within articular fossa at centric occlusion was evaluated. A statistical evaluation was done using a SPSS. Results : In the sagittal views, mandibular condyle within articular fossa was posteriorly located at medial and central sections. In the coronal views, mandibular condyle within articular fossa was laterally located at central section. Mandibular condyles in the right and left sides were showed asymmetric positional relationship at medial, central, and lateral sections. Conclusion : Mandibular condyle within articular fossa in an asymptomatic population was observed nonconcentric position in the sagittal and coronal views.

요추 추간판 탈출증에 의한 골반경사 치험 2례 - Mckenzie 수기요법을 이용

황형주,허광호,금동호,Hwang, Hyung-Joo,Heo, Kwang-Ho,Keum, Dong-Ho 척추신경추나의학회 2007 척추신경추나의학회지 Vol.2 No.1

Objectives : We evaluated the effect of Mckenzie method treatment by participating two patients suffering from Tortipelvis by lumbar disc herniation. Methods : Two patients were diagnosed as Tortipelvis by lumbar disc herniation through CT scan and X-ray examination. We used Mckenzie method and measured VAS(Visual analogue scale). Results and Conclusions : After using Mckenzie method treatment, We found out a recovery from both patients suffering from Tortipelvis by lumbar disc herniation. The result, through our study, suggests that Mckenzie method treatment was effective to cure the Tortipelvis by lumbar disc herniation. It also was effective to reduce the low back pain and to stabilize the lumbar disc herniation.

초음파영상을 이용한 정상 교근의 평가

황형주,김규태,최용석,황의환 대한구강악안면방사선학회 2008 Imaging Science in Dentistry Vol.38 No.2

Purpose : To assess the internal echo intensity and morphological variability of masseter muscles on ultrasonography and to establish diagnostic criterion of estimation. Materials and Methods : Participants consisted of 50 young adults (male 25, female 25) without pathologic conditions and with full natural dentitions. Sonographic examinations were done with real time ultrasound equipment as Logiq 500 (GE Medical Systems, Seoul, Korea) at 3 parts according to lines paralleling with ala-tragus line as reference line. The thickness and area of masseter muscles according to reference line in cross-sectional images were measured at rest and at maximum contraction. The visibility and width of the internal echogenic intensity of the masseter muscles were also assessed and the muscle appearance was classified into 4 types. Data were statistically analyzed by paired t-test and x²-test. Results : 1. When comparing the thickness and area of masseter muscles concerning with gender, there was few significant difference between right and left sides, however, there were significant differences between males and females except for the greatest thickness of left side. 2. The changes of the greatest thickness and the area between rest and maximum contraction showed that the part of the least thickness manifested more increase at maximum contraction. 3. Each part the manifestations of the internal echogenic intensity of the masseter muscles were different depending on the locations. But there was no statistically significance. Conclusion : Changes of muscles thickness with contraction and internal echogenic intensity with locations showed great disparity within the masseter muscles, which will be diagnostic criteria for pathophysiologic and anatomic changes of masseter muscles.

사전확률 갱신을 수행하는 교차 엔트로피 계획법

황형주,장영수,박재영,김기응 한국정보과학회 2020 정보과학회논문지 Vol.47 No.1

This paper introduces a method of cross-entropy planning which updates prior probability for planning optimization process. Cross-entropy planning is a popular method in online planning and involves the extraction of samples from a simulation environment and selection of optimal action based on the values of the extracted samples. The performance of the cross-entropy planning is limited due to involvement of optimization processes without usage of previous planning results. We propose a method that updates prior probabilities for the optimization process based on the action sequences acquired from the cross-entropy planning. The proposed method improves the performance of cross-entropy planning with progression of planning epoch. We evaluated the proposed method based on the comparison with the cross-entropy planning in a physical-based simulation (OpenAI Gym) environment. 본 논문에서는 사전확률 갱신을 수행하는 교차 엔트로피 계획법에 관해 기술한다. 교차 엔트로피 계획법은 실시간 계획법(online planning)에서 많이 사용하는 방법론으로 가상환경으로부터 표본(sample)을 추출하고 추출된 표본으로부터 평가된 가치를 기반으로 최적의 행동(action)을 선택한다. 기존 교차 엔트로피 계획법은 최적화 과정에서 이전에 얻어진 탐색결과를 활용하지 않고 매번 새롭게 탐색을 수행한다. 따라서 정해진 시간 내에 탐색을 수행해야 할 경우, 도달할 수 있는 성능이 제한되어 있다. 본 논문에서는 행동 차원에 대한 교차 엔트로피 계획법의 결과물을 활용하여 최적화 과정에서의 사전확률을 갱신하고, 이를 통해 점차 높은 성능을 보일 수 있는 방법론을 제안한다. 또한, 실험에서는 물리 기반 가상환경(OpenAI Gym)에서 교차 엔트로피 계획법과 비교를 통해 제안된 방법론을 평가한다.

『 삼국사기 』 에 나타난 김부식의 삼국통일기에 대한 의미부여와 그 서술양상

황형주 ( Hyeong Ju Hwang ) 우리한문학회 2000 漢文學報 Vol.2 No.-

족저근막 이완요법과 침치료를 이용한 족저근막염치험 2례

황형주 ( Hyung Joo Hwang ),이길준 ( Kil Joon Lee ),박영회 ( Young Hoi Park ),금동호 ( Dong Ho Keum ) 한방재활의학과학회 2008 한방재활의학과학회지 Vol.18 No.2

Objectives : Plantar fasciitis is most common cause of heel pain which starts from anterior tubercle of calcaneus. It is chronic inflamation of plantar fascia, reduces collagen and water content of heel pad which incur the degenerative changes with elastic fiber weakness. We have evaluated the effect of myofacial releasing therapy and acupuncture therapy by experimenting two patients suffering from plantar fasciitis. Methods : Two patients were diagnosed as plantar fasciitis through their symptoms. We used myofacial releasing therapy and acupuncture therapy to the patients and measured VAS(Visual analogue scale). Results and Conclusions : After treating myofacial releasing therapy and acupuncture therapy in two cases, We figured out that the patients were on the mend. These results suggest that myofacial releasing therapy and acupuncture therapy were effective to heel pain.

천장관절 증후군에 박동성 전기자장 치료와 병행한 침치료의 효과 연구

황형주 ( Hyung Joo Hwang ),금동호 ( Young Hoi Park ),박영회 ( Dong Ho Keum ) 한방재활의학과학회 2010 한방재활의학과학회지 Vol.20 No.3

Objectives: Although the controversy surrounding the biomechanics of the sacroiliac joint remains unresolved at this time, the clinical importance of this joint in the cause of back pain has been established since 1930`s. Recently, there has been renewed interest in the sacroiliac joint. This study was performed to evaluate the effects of pulsed electromagnetic therapy(PEMT) with acupuncture therapy for patients, who were suffering from sacroiliac joint syndrome, and to conduct more researches in the usage of acupuncture therapy for treating sacroiliac joint syndrome. Methods :25 patients, who were diagnosed as sacroiliac joint syndrome were selected. They were treated twice a week during 3 weeks. They were measured after all the treatment and first week and fourth week after termination of treatment by using visual analogue scale(VAS) and Roland Morris disability index(RMDI). The VAS and RMDI patterns were analyzed by using `pared T-test` and `Kruskal-Wallis` test. Results :1. Each times of PEMT with acupuncture therapy, there were statistical significance in improvement of VAS(p<0.05) and each times of therapy except 1st one, there were statistical significance in improvement of RMDI(p<0.05). 2. After 4th therapy, there were most significant improvement of VAS with RMDI(p<0.001), when we compared the change in VAS and RMDI before and after the each therapy. 3. There was no statistical significance in VAS and RMDI by onset, sex and age. Conclusions :The results indicate that pulsed electromagnetic therapy and acupuncture therapy had good effect on sacroiliac joint syndrome.

개념모형을 이용한 계절변동이 엘니뇨 변동성에 미치는 영향 연구

하규식,국종성,황형주 한국기상학회 2017 한국기상학회 학술대회 논문집 Vol.2017 No.5

요추간판 탈출증 환자의 전산화 단층 촬영 검사상 다열근 위축에 대한 증례 5례 보고

정민규,이길준,황형주,금동호,Jung, Min-Gyu,Lee, Kil-Joon,Hwang, Hyung-Joo,Keum, Dong-Ho 척추신경추나의학회 2008 척추신경추나의학회지 Vol.3 No.2

Objectives : Lumbar multifidus muscle stabilize lumbar spine. Atrophy of multifidus muscle follows disfunction of low back pain patient's activity and increase the reoccurency of herniation of nucleus purposus surgery. Lumbar herniation of nucleus purposus if common cause of low back pain. We have evaluated the atrophy of multifidus of nucleus purposus. Methods : Five patients were diagnosed as Lumbar herniation of nucleus purposus through the CT imaging. CT imaging were visually analysed to know lumbar multifidus muscle atrophy. Results and Conclusions : Examination of multifidus muscle atrophy should be considered with assessing CT imaging of lumbar spine. It may help for further evaluation and planning the treatment of Lumbar herniation of nucleus purposus patient.

경추성 두통에서 박동성 전기자장 치료의 효과 연구: 무작위 임상 연구

허광호 ( Kwang Ho Heo ),황형주 ( Hyung Joo Hwang ),박영회 ( Young Hoi Park ),금동호 ( Dong Ho Keum ) 한방재활의학과학회 2007 한방재활의학과학회지 Vol.17 No.3

Objectives:The study was performed to evaluate the effects of ElectroMagnetic Therapy treatment for patients suffering from cervicogenic headaches.Methods:After receiving medical examination at the Department of Oriental Rehabilitation Medicine, College of Oriental Medicine, Dong-Guk University from November 1, 2006 to June 5, 2007, 34 patients with cervicogenic headache were devided into two groups(experimental vs control).Experimental group(n=18) was treated with both Pulsed ElectroMagnetic therapy(PEMT) and acupuncture, control group(n=16) was treated with acupuncture only. Visual Analogue Scale(VAS) was measured as a primary outcome measure, and was statistically analyzed using t-test.Results:Experimental group was effective than control group in pain intensity using VAS, because PEMT plus acupuncture was more effective than acupuncture only(p<0.05).Conclusions:The results indicate that the pulsed electromagnetic therapy is effective on treating cervicogenic headaches.