Open Ended 구조를 이용한 Coplanar Waveguide 5㎓ Rectangular Patch Antenna 설계

김명진(Kim Myung-Jin),정지현(Jung Ji-Hyun),지용(Jee Yong) 한국통신학회 2003 한국통신학회 학술대회논문집 Vol.2003 No.11

견갑골 안정화를 위한 다양한 운동의 비교연구

김명진 ( Myung Jin Kim ),이유진 ( Yu Jin Lee ),김지혁 ( Ji Hyuk Kim ),배원식 ( Won Sik Bae ) 대한통합의학회 2013 대한통합의학회지 Vol.1 No.3

PURPOSE : This study of 20 healthy male subjects by applying various scapular stabilization exercise to compared Serratus anterior and lower trapezius is change in ultrasound images. METHOD : Thirty healthy subjects voluntarily participated in this study. Ultrasound imaging was recorded from the increasing the activity of Serratus anterior(SA) and Lower trapezius(LT) muscles using Push-up plus, Wall slide, Scapular plane shoulder elevation with resistance exercise. Thickness changes in the Serratus anterior(SA) and lower trapezius(LT) muscles between the relaxed and contracted states in the each exercises. To identify statistical significance, one-way ANOVA with repeated measures was used with the significance level of .05. RESULT : The results of this study were as follows : 1) There were statistically significant difference in thickness changes in the Serratus anterior(SA) and lower trapezius(LT) muscles between the relaxed and contracted states in the each exercises. 2) The Scapular plane shoulder elevation with resistance is more effective to Strengthening in the scapular stabilization muscles than Push up-plus and Wall slide. CONCLUSION : The Scapular plane shoulder elevation with resistance may be used to effectively that patient with various shoulder pain.

Open End Gap을 갖는 Coplanar Waveguide 불연속 구조에 대한 등가 캐패시턴스와 등가 인덕턴스

김명진(Kim Myung-Jin),정지현(Jung Ji-Hyun),김경오(Kim Kyung-O),남상우(Nam Sang-Woo),지용(Jee Yong) 한국통신학회 2002 한국통신학회 학술대회논문집 Vol.2002 No.7

선박용 액체수소 저장탱크 시험평가절차 ISO 국제표준 개발 연구

정지현(Ji Hyun Jung),전주영(Joo Yeong Jeon),임진홍(Jin Hong Lim),손승민(Seong Min Son),김소정(So Jeong Kim),전보미(Bomi Jeon),김명진(Myung Jin Kim),최주형(Ju Hyung Choi) 대한기계학회 2022 대한기계학회 춘추학술대회 Vol.2022 No.6

강우유출수 침투필터의 폐색 예측을 위한 딥러닝 모델 개발

이병식(Byung-Sik Lee) 한국산학기술학회 2021 한국산학기술학회논문지 Vol.22 No.9

필터폐색은 강우유출수 침투시설 기능저하의 주된 요인이다. 침투시설의 수명예측과 효율적인 유지관리를 위해서는 폐색도의 명확한 예측이 필수적으로 요구된다. 폐색현상을 조사하기 위한 시험연구들이 꾸준히 수행되어 왔다. 시험연구 결과에 근거하여 폐색예측을 위한 시험모델들이 제안되어 왔다. 시험모델 개발에는 적지 않은 시간과 비용이 소요된다. 따라서 시험모델을 보완하기 위해 다양한 이론모델의 적용이 시도되었다. 하지만 제안된 이론모델을 적용함에 있어서 문제점이 상존한다. 일반적으로 결정하기 힘든 많은 수의 자료 입력이 요구된다. 또한 많은 경우에 얻은 결과의 신뢰도도 낮다. 최근에는 여러 분야에서 기존 이론모델을 대체하는 데이터 기반 모델 개발을 위해 딥러닝 기법을 적용하고 있다. 개발된 딥러닝 모델들은 기존 이론모델의 단점을 보완할 수 있을 것으로 기대된다. 이 논문에서는 장단기기억순환신경망(LSTM-RNN : Long Short Term Memory - Recurrent Neural Network)을 이용하여 강우유출수 침투시설의 폐색을 추정하는 모델을 개발하였다. 침투시험 결과에 대한 훈련 및 검증을 통해 개발된 모델의 실용 가능성을 실증하였다. 결과에 근거하여 폐색 데이터 축적과 적용성이 기대되는 딥러닝 기법을 필터폐색 모델에 적용하기 위한 지속적인 연구를 제안할 수 있었다. Filter clogging is a major problem resulting in the failure of a stormwater infiltration system. Definite knowledge about the degree of clogging is essential to plan effective maintenance and estimate the lifespan of the facility. Experimental studies have been conducted continuously to investigate clogging phenomena. Based on experiment results, experimental models to estimate clogging have been suggested. A relatively long period and high cost are required to develop experimental models. Thus, the applications of various theoretical models have been attempted to supplement experimental models. On the other hand, problems have limited the applications of the suggested theoretical models. A large number of difficult-to-determine inputs are usually required. Therefore, the obtained results are not confident. Deep learning techniques have recently been applied to develop new data-driven models replacing conventional models in various fields. The developed deep learning models are expected to exclude the shortcomings of theoretical models. The LSTM-RNN (Long Short Term Memory-Recurrent Neural Network) model was developed to estimate the clogging of stormwater infiltration systems. The applicability of the model was validated by implementing the model train and evaluation by the experimental infiltration test results. As a result, ongoing studies could be suggested to accumulate clogging data and apply promising deep learning algorithms to clogging models.

연구논문 : 전국자연환경조사 자료를 이용한 종분포모형 연구

김지연 ( Ji Yeon Kim ),서창완 ( Chang Wan Seo ),권혁수 ( Hyuk Soo Kwon ),류지은 ( Ji Eun Ryu ),김명진 ( Myung Jin Kim ) 한국환경영향평가학회 2012 환경영향평가 Vol.21 No.4

The Ministry of Environment have started the ``National Ecosystem Survey`` since 1986, It has been carried out nationwide every ten years as the largest survey project in Korea, The second one and the third one produced the GIS-based inventory of species. Three survey methods were different from each other. There were few studies for species distribution using national survey data in Korea. The purposes of this study are to test species distribution models for finding the most suitable modeling methods for the National Ecosystem Survey data and to investigate the modeling results according to survey methods and taxonominal group. Occurrence data of nine species were extracted from the National Ecosystem Survey by taxonomical group (plant, mammal, and bird). Plants are Korean winter hazel (Corylopsis coreana), Iris odaesanensis (Iris odaesanensis), and Berchemia (Berchemia berchemiaefolia). Mammals are Korean Goral (Nemorhaedus goral), Marten (Martes flavigula koreana), and Leopard cat (Felis bengalensis). Birds are Black Woodpecker (Dryocopus martius), Eagle Owl (Bubo Bubo), and Common Buzzard (Buteo buteo), Environmental variables consisted of climate, topography, soil and vegetation structure, Two modeling methods (GAM, Maxent) were tested across nine species, and predictive species maps of target species were produced, The results of this study were as follows. Firstly, Maxent showed similar 5 cross-validated AUC with GAM. Maxent is more useful model to develop than GAM because National Ecosystem Survey data has presence-only data. Therefore, Maxent is more useful species distribution model for National Ecosystem Survey data. Secondly, the modeling results between the second and third survey methods showed sometimes different because of each different surveying methods, Therefore, we need to combine two data for producing a reasonable result, Lastly, modeling result showed different predicted distribution pattern by taxonominal group. These results should be considered if we want to develop a species distribution model using the National Ecosystem Survey and apply it to a nationwide biodiversity research.

광교신도시의 광교테크노밸리 조성과정에서의 성과와 한계

이지은 ( Ji Eun Lee ),백인길 ( In Gill Baek ),김명진 ( Myung Jin Kim ) 한국도시지리학회 2016 한국도시지리학회지 Vol.19 No.2

도시경쟁력을 높이기 위한 하나의 방법으로 신도시개발이 이루어지고 있다. 광교신도시는 지방자체단체인 경기도가 주도적으로 경기남부지역에 광역행정 및 첨단산업 입지를 통한 자족형 신도시를 건설하고자 하는 분명한 조성목적을 가지고 건설되었고, 그 일환으로 광교테크노밸리를 연구개발종합거점으로 구축하였다. 그리하여 본 논문에서는 지자체가 주도적으로 조성한 신도시와 R&D클러스터의 대표적인 모델인 광교신도시 및 광교테크노밸리 조성과정을 고찰함으로써 지금까지의 성과와 한계를 도출하고자 한다. 경기도는 지방자치단체가 주도적으로 첨단 R&D연구단지를 포함하는 광교신도시 계획을 추진하였고, 광교신도시 내 도시지원시설에 경기중소기업종합지원센터, 나노소자특화팹센터, 차세대융합기술원, 경기바이오센터 등의 첨단기술 관련 공공기관을 단계적으로 유치하고 개발하여 현재의 광교테크노밸리를 조성하였다. 본 연구는 혁신클러스터 구축을 통해 자족도시를 지향하는 타 지방자치단체의 신도시조성사업에 참고자료가 될 수 있을 것이다. New town construction is one of the ways to enhance city competitiveness. Gyeonggi provincial government has constructed Gwanggyo New Town with the clear purpose of making it as a self-sufficient city which has an integrated administrations as well as high-tech industries in the southern part of Gyeonggi. This paper examines carefully how Gyeonggi provincial government constructed a R&D research complex called "Gwanggyo Techno Valley" as well as Gwanggyo New Town so that city competitiveness is strengthened, and provides performance and future tasks. Gyeonggi provincial government has set up Gwanggyo New Town Project, and invited step by step several public R&D facilities such as Korea Advanced Nano Fab Center, Advanced Institutes of Convergence Technology, and Gyeonggi Bio Center to "Gwanggyo Techno Vally." In the near future, this study can have an effect on new town projects including a R&D cluster by different local governments.

전판상화 유리조직판을 이용한 상악결손 재건

김지연(Ji-Youn Kim),방강미(Kang-Mi Pang),박종철(Jong-Chul Park),김성민(Sung-Min Kim),명훈(Hoon Myoung),김명진(Myung-Jin Kim),이종호(Jong-Ho Lee) 대한구강악안면외과학회 2009 대한구강악안면외과학회지 Vol.35 No.1

Background In contrast to defects of the mandible and mouth floor region, in the defect of maxilla, the availability of firmly attached oral and nasal mucosal linings is needed. In addition to it, in consider of operation field, operating convenience, and esthetics, reconstruction using prelaminated flap is strongly recommended. Therefore we consider the prelaminated flap through the cases that is reconstructed using prelaminated forearm flap and prelaminated scapular flap. Patients and Methods From 2001 to 2008, in OMFS SNUDH, there were 6 cases that had reconstruction using prelaminated forearm free flap and other 3 cases that had reconstruction using prelaminated scapular flap of maxilla. The average age of patients that were reconstructed using prelaminated forearm free flap was 47.5 years, the average prelaminated period (after 1st operation ~ until 2nd operation) was 51.8 days and the average follow-up period after 2nd operation was 35.3 months. As well, the average age of patients that were reconstructed using prelaminated scapular free flap was 37 years, the average prelaminated period (after 1st operation ~ until 2nd operation) was 57 days and the average follow-up period after 2nd operation was 42.3 months. Results Except 1 case that were reconstructed using prelaminated scapular flap, we could get firmly attached oral and nasal stable skin(mucosal like) lining, more adequate thickness flap than any other flap and improved esthetic and functional results in the other 8 cases that were reconstructed using prelaminated flap. The complications of the prelaminated forearm flap cases were inconvenient swallowing, sputum, limitation of mouth opening and difficult mastication. It came from flap shrinkage of the flap in some aspect, as well as other combined operations such as mass resection or RND. The difficult point of the reconstruction of prelaminated scapular flap was the possibility of vascular damage at preparation of flap in 2nd surgery. The damage could cause the failure of the prelaminated scapular flap. And the skin-lining of the prelaminated flap had limitations, so it is needed to study about the cultured oral epithelium-lining flap instead of the skin-lining flap. Conclusion We considered about advantages, complications and notable things of prelaminated flap through maxillary reconstruction cases using prelaminated forearm flap and prelaminated scapular flap so far. Furthermore, we should go on studying for functional reconstruction of prelaminated fasciomucosal flap using cultured oral epithelium.

폐쇄성 수면무호흡환자에서 확대 구개수구개피판을 이용한 치험례

김지연(Ji-Youn Kim),김성민(Soung-Min Kim),명 훈(Hoon Myoung),황순정(Soon-Jung Hwang),서병무(Byoung-Moo Seo)이종호(Jong-Ho Lee),정필훈(Pill-Hoon Choung),김명진(Myung-Jin Kim),최진영(Jin-Young Choi) 대한구강악안면외과학회 2011 대한구강악안면외과학회지 Vol.37 No.1

The uvulopalatal flap (UPF) technique is a modification of uvulopalatopharyngoplasty (UPPP) for the surgical treatment of obstructive sleep apnea. In the UPF technique, an uvulopalatal flap is fabricated and sutured to the residual mucosa of the soft palate to expand the antero-posterior dimensions of the oropharyngeal inlet. In the extended uvulopalatal flap (EUPF) technique, an incision at the tonsillar fossa is added to the classical UPF technique followed by the removal of mucosa and submucosal adipose tissue for additional expansion of the lateral dimension. The EUPF technique is more conservative and reversible than UPPP. Therefore, complications, such as velopharyngeal insufficiency, dysphagia, dryness, nasopharyngeal stenosis and postoperative pain, are reduced. In the following case report, the patient was diagnosed with obstructive sleep apnea and treated with the EUPF technique. The patient’s total respiratory disturbance events per hour (RDI) was decreased to 15.4, the O 2 saturation during the sleep was increased, and the excessive daytime sleepiness had disappeared after the surgery without complications. The authors report this case with a review of the relevant literature.

광학추적항법장치를 이용한 르포씨 제1형 골절단 가상 수술의 정확성에 대한 연구

부연지(Yeon-Ji Bu)김성민(Soung-Min Kim),김지연(Ji-Youn Kim),박정민(Jung-Min Park),명 훈(Hoon Myoung),이종호(Jong-Ho Lee),김명진(Myung-Jin Kim) 대한구강악안면외과학회 2011 대한구강악안면외과학회지 Vol.37 No.2

Introduction: The aim of this study was to demonstrate that the simulation surgery on rapid prototype (RP) model, which is based on the 3-dimensional computed tomography (3D CT) data taken before surgery, has the same accuracy as traditional orthograthic surgery with an intermediate splint, using an optoelectronic tracking navigation system. Materials and Methods: Simulation surgery with the same treatment plan as the Le Fort I osteotomy on the patient was done on a RP model based on the 3D CT data of 12 patients who had undergone a Le Fort I osteotomy in the department of oral and maxillofacial surgery, Seoul National University Dental Hospital. The 12 distances between 4 points on the skull, such as both infraorbital foramen and both supraorbital foramen, and 3 points on maxilla, such as the contact point of both maxillary central incisors and mesiobuccal cuspal tip of both maxillary first molars, were tracked using an optoelectronic tracking navigation system. The distances before surgery were compared to evaluate the accuracy of the RP model and the distance changes of 3D CT image after surgery were compared with those of the RP model after simulation surgery. Results: A paired t-test revealed a significant difference between the distances in the 3D CT image and RP model before surgery.(P<0.0001) On the other hand, Pearson s correlation coefficient, 0.995, revealed a significant positive correlation between the distances.(P<0.0001) There was a significant difference between the change in the distance of the 3D CT image and RP model in before and after surgery.(P<0.05) The Pearson s correlation coefficient was 0.13844, indicating positive correlation.(P<0.1) Conclusion: Theses results suggest that the simulation surgery of a Le Fort I osteotomy using an optoelectronic tracking navigation system is relatively accurate in comparing the pre-, and post-operative 3D CT data. Furthermore, the application of an optoelectronic tracking navigation system may be a predictable and efficient method in Le Fort I orthognathic surgery.