관혈적 정복술 및 내고정술 후 군인에게 발생한 경비골 원위부 골결합증(1예 보고)

이준영,남기영,송경철,Lee, Jun-Young,Nam, Ki-Young,Song, Kyoung-Chul 대한족부족관절학회 2010 대한족부족관절학회지 Vol.14 No.1

The scanty literature on distal tibiofibular synostosis includes descriptions of relatively few specific complaints. Here we report a case of a 24-year-old young soldier who sustained a left ankle lateral malleolar fracture about 6 months ago and was initially treated by the open reduction and internal fixation with plate & screw. But 6 months later, he suffered from an vague ankle pain, each time the symptoms occurred right after an active ambulation, ankle dorsiflexion, especially when he had exercised aggressively. The radiographs revealed that there was a mature distal tibiofibular synostosis. We treated the patient with surgical excision of synostosis. Post-operative condition was satisfied to all concern and the result was found to be excellent during one-year follow-up.

인터넷 중독 고위험 청소년의 성별에 따른 임상적, 정신병리적 특성

이지윤(Ji Yoon Lee),권준근(Jun-Gun Kwon),이준영(Jun-Young Lee),정희연(Hee Yeon Jung),손보경(Bo Kyung Sohn),최삼욱(Sam Wook Choi),김대진(Dai Jin Kim),최정석(Jung-Seok Choi) 한국중독정신의학회 2016 중독정신의학 Vol.20 No.1

Objectives : Most previous studies of Internet addiction (IA) have been performed on males, and little is known about gen-der differences in IA. We examined gender differences in the clinical and psychopathological features related to high-risk for IA among adolescents. Methods : 714 (male : N=389 ; fe-male : N=325) have reported questionnaires as follows ; 1) clinical and psychopathological features (depression, anxiety, Attention Deficit Hyperactivity Disorder (ADHD) symptoms, Smartphone addiction, impulsivity, behavioral inhibition and approach systems, state-trait anger, aggression, beliefs about aggression, and resilience) 2) Internet and Smartphone usage patterns. In 691 who completed the Young’s Internet Addiction Test (YIAT), A total of 487 adolescents were classified into the normal Internet use group, with YIAT scores of 20-39 (male :N=232 ; female : N=255) and 204 adolescents were classified into high-risk for IA group (male : N=144 ; female : N=60). Results : Most factors described above predicted high-risk for IA in male and female adolescents. Especially, the present study found that psychological resilience had negative association with possibility of IA in female, while cognitive impulsivity and hostile aggression were associated with possibility of IA in male adolescents. Conclusion : This study found gender-re-lated features in adolescents at high-risk for IA. Thus, gender-specific strategies are needed to maximize prevention and treatment effectiveness of IA.

내측 반월상 연골판 후각 기시부 파열의 특징 및 관절경 소견

이준영,김동휘,하상호,이상홍,강정훈,Lee, Jun-Young,Kim, Dong-Hui,Ha, Sang-Ho,Lee, Sang-Hong,Gang, Joung-Hun 대한정형외과스포츠의학회 2009 대한정형외과스포츠의학회지 Vol.8 No.1

목적: 중년 이후에서 흔히 일어나는 내측 반월상 연골판 후각 부착 부에 발생하는 방사상 파열의 임상적 특성과 관절경적 소견을 문헌 고찰과 함께 보고하고자 한다. 대상 및 방법: 2005년 1월부터 2007년 4월까지 본원 정형외과에 내원하여 슬관절 내시경 수술을 시행 받은 환자 중 관절경상 내측 반월상 연골판 후각 부착 부 파열이 관찰되었던 환자 40명, 40례에 대해 의무 기록을 통한 후향적인 검사를 시행하였다. 남자 7명, 여자 33명이고, 평균 연령61(47~80)세이며, 외상 병력의 유무, 동반된 관절염의 등급 및 통증 발생 후부터 수술까지의 기간(유병기간), 자기공명영상 소견, 임상 증상 및 파열단의 모양과 치료법 등을 검토하였다. 결과: 외상 병력이 있었던 경우가 6례며, 34례는 외상 병력이 없었다. 단순 방사선 사진상 Kellgren-Lawrence 분류는 0-II형이 31례, III형은 9례 였으며, 관절경상 대퇴골 내과의 관절 연골 상태는 Outerbridge grade IV 형이 17례, III 형이 4례, II 형이 9례, I 형이 9례이었다. 유병기간은 평균 5.3개월이었으며, MRI 소견으로는 전례에서 축상면 또는 관상면에서 틈(cleft)나 시상면에서 유령 징후(ghost sign) 중 1개 이상이 관찰되었다. 파열단의 모양은 18례가 뭉툭한 형태, 12례가 수평 파열, 10례가 퇴행성 파열이었으며 수술법으로는 연골판 아전 절제술을 16례, 부분 절제술을 10례, 봉합술을 14례에서 시행하였다. 결론: 중년 이후의 연령에서 반월상 연골판 후각 부착부 파열은 외상 병력이 드물게 발생하며 심한 기계적 증상을 호소하며, 관절염을 동반하는 경우가 많다. 치료로 절제술 뿐만 아니라 봉합술을 시도해 볼만한 파열이 있었으며, 추후 그 치료 결과에 대한 연구가 필요하다. Purpose: We wanted to report the clinical characteristics and arthroscopic findings of radial tear in medial meniscus posterior horn insertion, commonly occurs in patient over middle age with documentary review. Materials and Methods: Retrograde study using hospital records was done to 40 cases in 40 patients who visited our hospital and had been performed knee arthroscopic surgery due to medial meniscus posterior horn insertion tear between January, 2005 to April, 2007. Seven cases were male and 33 cases were female with the mean age of 61 (range, 47-80). Trauma history, stage of arthritis, period between pain and operation, MRI findings, clinical symptoms and operation methods were evaluated. Results : Six cases had trauma history while 34 cases didn't. In simple x-ray, using Kellgren-Lawrence classification, 31 cases were between stage 0 and II while 9 cases were stage III. In arthroscopic exam, there were 17 cases of Outerbridge grade IV, 4 cases of grade III, 9 cases of grade II, 9 cases of grade I. The mean duration of pain was 5.3 months. In MRI, at least one finding of cleft in axial or coronal view or ghost sign in sagittal view was found in all cases. The shape of meniscus tears were blunt in 18 cases, transverse in 12 and degenerative tear in 10. Subtotal meniscectomy was performed in 16 cases, partial meniscectomy in 10 cases and meniscal repair in 14 cases. Conclusion : Medial meniscus posterior horn insertion tear occurs in patients over middle age is rarely related to trauma history but causes painful mechanical symptom and usually accompany arthritis. Meniscectomy can be done for the treatment but repair can be considered is some cases. Further study on the treatment result will be needed.

가접부를 고려한 필릿 용접조건의 선정에 관한 연구

이준영,김재웅,김철희,Lee, Jun-Young,Kim, Jae-Woong,Kim, Cheol-Hee 대한용접접합학회 2006 대한용접·접합학회지 Vol.24 No.5

In this study, an experimental method for the selection of optimal welding condition was proposed in the fillet weld which was done over the tack weld. This method used the response surface analysis in which the leg length and the reinforcement height were chosen as the quality variables of the weld bead profile. The overall desirability function, which was combined desirability function fur the two quality variables, was employed as the objective function for getting the optimal welding condition. In the experiments, the target values of the leg length and the reinforcement height are 6m and zero respectively for the horizontal fillet weld of 10mm thickness mild steel. The optimal welding conditions could predict the weld bead profile(leg length and reinforcement height) as 6.00mm and 0.19mm without tack weld and 6.00mm and 0.48mm with tack weld. from a series of welding test, it was revealed that a uniform weld bead can be obtained by adopting the optimal welding condition which was determined according to the method proposed.

Cost Effective Fabrication of a Triboelectric Energy Harvester Using Soft Lithography

이준영,성태훈,여종석,Lee, Jun-Young,Sung, Tae-Hoon,Yeo, Jong-Souk The Korean Vacuum Society 2013 Applied Science and Convergence Technology Vol.22 No.4

에너지 수확은 우리주변에 존재하는 버려지는 에너지를 유용한 전기에너지로 변환하는 기술이다. 마찰전기 소자는 접촉을 통한 정전기를 유도하는 원리로 동력학적 에너지를 전기에너지로 전환하는 소자이다. 본 연구에서는 소프트 식각 기술을 활용하여 제작 단계를 최소화한 마찰전기 에너지 수확소자를 개발하고, 그 전기적 특성을 측정하였다. 마찰전기를 통한 발전은 마이크로패턴을 통해 마이크로 거칠기를 가진 알루미늄 층과 PDMS 층 사이에서 발생한다. 이때 PDMS 층의 마이크로 패턴은 마스크리스 식각을 통해 만들어진 알루미늄 층의 마이크로 패턴을 소프트 식각법으로 바로 본뜨는 방식으로 제작되었다. 본 소자는 2 V와 20 nA의 발전 성능을 나타낸다. Energy harvesting refers to converting ambient energy from our surroundings, which would be otherwise wasted, into useful electrical energy. A triboelectric energy harvester is a self-charged device for harnessing mechanical energy based on a coupled process of contact charging and electrostatic induction. In this research, we demonstrate simple fabrication of prototype triboelectric energy harvester using soft lithography and its electrical characterization. Triboelectric generation occurs between the two micro patterned layers of Au and PDMS. A micro pattern is simply replicated directly from the bottom layer to the top layer using soft-lithography without an extra transfer process. This generator can produce an output voltage of 2 V and output current of 20 nA.

저전력 네트워크 기반의 확장 용이한 스마트 홈 IoT 시스템

이준영,유성은,Lee, Jun-young,Yoo, Seong-eun 대한임베디드공학회 2018 대한임베디드공학회논문지 Vol.13 No.3

There are increasing interests on smart home systems. However, most of the existing works focus on the functionality itself. In this paper, we propose an extensible smart home system based on low power networking such as CoAP, 6LoWPAN, and Zigbee. The proposed home IoT system consists of Home APP, Home Server, Home Broker, and Power Devices. Each component of the system is connected by the low-power network technologies aforementioned. As the end device, Power Device senses the current consumption of the attached appliance and controls the power to it. Power Device reports the sensing data to Home Server via Home Broker. The Home Broker enhances the scalability of the system. Home Broker extends the service area and the user's services, and it manages the connection of the underlying devices and processes, and transmits data to Home Server from Power Devices. Through the experimental evaluation, we show that the proposed system achieves the design goals such as extensibility and low power networking.

무기전계발광 디스플레이 소자 제작 및 광학 특성 연구

이준영,황진하,Lee, Jun-Young,Hwang, Jin-Ha 한국세라믹학회 2009 한국세라믹학회지 Vol.46 No.3

Statistical designs of experiments were applied in order to understand the effect of processing variables on the brightness of inorganic electroluminescent displays. The main effects and interaction of phosphor and dielectric layers are estimated to be statistically significant. Additional improvement was made on removing the pores in the thick films, using the defoaming in pastes and cold isostatic pressing in bonding the top and bottom parts of the inorganic electroluminescent devices. Such optimization contributed to the reduction in the corresponding threshold voltage and enhancement in the brightness.

경거골유합술 후 발생하는 불유합과 관련된 인자에 대한 분석

이준영,김보선,이정우,Lee, Jun Young,Kim, Bo Sun,Lee, Jung Woo 대한족부족관절학회 2017 대한족부족관절학회지 Vol.21 No.3

Purpose: The aim of this study was to analyze the factors related to nonunion in tibiotalar arthrodesis. Materials and Methods: Eighty cases of ankle arthritis treated with tibiotalar arthrodesis in our hospital from November 2008 to November 2015 with more than one year follow up were analyzed. Simple anteroposterior and lateral radiographs after 6 and 12 months of surgery were analyzed. Union was defined as more than 50% connection of the trabecular bone at the ankle joint surface in the anteroposterior and lateral radiographs. The nonunion group was defined as no signs of union with persistent pain 9 months after surgery. The surgical approach, type of used screw, preoperative and postoperative ankle alignment, body mass index (BMI), bone mineral density, and patients' prior history were compared between the two groups. Results: There were 69 union cases and 11 nonunion cases. In the patient factors, the gender and BMI was related to nonunion (p<0.05). The mean preoperative and postoperative ankle alignment in the nonunion group was $9.93^{\circ}{\pm}6.92^{\circ}$ and $5.43^{\circ}{\pm}3.35^{\circ}$ respectively, and $9.80^{\circ}{\pm}7.55^{\circ}$ and $5.63^{\circ}{\pm}3.45^{\circ}$ in the union group, respectively; the difference was not statistically significant (p>0.05). In the technical factors, the transfibular approach showed a better relationship but the association was not significant (p<0.05). In 40 cases of the transfibular approach, 12 cases used cancellous screws, and 4 cases showed nonunion due to screw breakage. Conclusion: Technical factors, such as the surgical approach and the type of screw used can be a risk factor in nonunion. In addition, patients' factors, such as gender and BMI, must be considered to reduce the nonunion rate.

골다공증과 동반된 족관절 외과 골절의 지연나사를 이용한 치료

이준영,이광철,Lee, Jun-Young,Lee, Kwang-Chul 대한족부족관절학회 2006 대한족부족관절학회지 Vol.10 No.2

Purpose: To evaluate the results of ankle lateral malleolar fractures classified as Danis-Weber type B accompanying osteoporosis that were treated with lag screw. Materials and Methods: 15 cases of Danis-Weber type B ankle lateral malleolar fractures that had T score of less than -2.5 in BMD(bone mineral density) test were selected from June 2003 to December 2005. 10 cases were males and 5 cases were females with mean age of 59 years. The main injury mechanism was supination and external rotation. Mean follow-up period was 16 months. Clinical and radiologic evaluation was done according to Meyer and Kumler's criteria. Results: All cases showed satisfying result and mean radiologic bone union period was 3 months. Anatomic reduction and bone union was acquired in all cases without complications including wound infection, skin necrosis, delayed union and nonunion Conclusions: Lag screw fixation seem to be excellent treatment of Danis-Weber type B lateral malleolar fractures with osteoporosis as it can minimize soft tissue injury and enable anatomic reduction with firm fixation.

관절외 배부 폐쇄 쐐기 절골술을 이용한 Freiberg병의 치료 결과

이준영,김웅희,정성,양성훈,Lee, Jun Young,Kim, Woong Hee,Jung, Sung,Yang, Sung Hun 대한족부족관절학회 2016 대한족부족관절학회지 Vol.20 No.3

Purpose: The aim of this study was to evaluate the result of extraarticular dorsal closing wedge osteotomy in Freiberg's disease. Materials and Methods: Between February 2012 and July 2014, total 10 patients who underwent dorsal closing wedge osteotomy and followed up more than 1 year were selected for inclusion. Average age was 16.3 years, and average follow-up period was 15.5 months. The diagnosis was made using magnetic resonance imaging of those with a limitation in walking or usual activity due to pain in the metatarsal head. During operation, we removed loose body, and synovectomy was done. Osteotomy at the metatarsal neck and fixation with Kirschner wire were performed. X-ray was taken to check shortening of 2nd metatarsal and bone union. Moreover, we checked the active range of motion of 2nd metatarsophalangeal joint before and after surgery. At the last follow-up, the shortening of metatarsal, American Orthopaedic Foot and Ankle Society (AOFAS) score, visual analogue scale (VAS), and patient's subjective satisfaction were evaluated. Results: According to the Smillie's stage, there were 3 cases of stage II, 4 cases of stage III, and 3 cases of stage IV. Average bone union time on the osteotomy site was 8 weeks. Average shortening of metatarsal was 2.53 mm. Average AOFAS score improved significantly from 56.9 to 82.8 points at final follow-up (p<0.05), and average VAS score also improved significantly from 6.4 to 1.4 points at final follow-up (p<0.05). Average active range of motion at metatarsophalangeal joint improved from $28.0^{\circ}$ preoperatively to $46.5^{\circ}$ at the final follow-up. Other complications, such as metatarsalgia and arthritis, were not found; however, there was 1 case of delayed union with no symptom. Conclusion: In Freiberg's disease, dorsal closing wedge osteotomy is recommended for the improvement of clinical symptoms and range of motion.