실시간교통정보 이용에 따른 차량의 CO, VOC, NOx 저감효과 평가

김준형,엄정섭,Kim, Jun-Hyung,Um, Jung-Sup 한국환경영향평가학회 2011 환경영향평가 Vol.20 No.2

This paper was inspired by the fact that Real-time Traffic Information Service could play a key role in reducing incomplete combustion time remarkably since it can provide traffic jam information in real-time basis. Emission characteristics of experimental engines were studied with variable travel distances and speed of car in terms of traffic information provided. 12 Km distance road of Susung district in Daegu is taken as an experimental area to examine this new approach. The emission was tested while the driving was done at 8 AM, 3 PM, 6 PM which represents various traffic conditions. The reduced emission has been measured for a travel distance running at different loads (conventional shortest route and Real-time Traffic Information) and various loads (CO, VOC and NOx) are all inventoried and calculated in terms of existing emission factors. The emission has been shown to reduce linearly with travel distance : carbon monoxide (20.56%), VOC (29.21%), NOx(8.86%).

Infrared Camera를 활용한 가열 아스팔트 혼합물의 효율적인 다짐관리 방안

김준형,이석홍,김완상,Kim. Jun-Hyung,Lee. Suck-Hong,Kim. Wan-Sang 한국방재학회 2007 한국방재학회 학술발표대회논문집 Vol.2007 No.1

아스팔트포장의 수명 및 공용성 확보를 위한 품질관리 대책의 하나로 아스팔트포장 포설면의 온도 불균형(Thermal Segregation) 현상 최소화를 위하여 균질한 다짐밀도를 확보하기 위한 연구가 미국에서 수행되고 있다. 특히, 적외선 카메라(Infrared Camera)를 이용하여 포설 또는 다짐작업 중인 아스팔트포장 표면의 온도분포를 파악하여 품질관리 기준으로 활용하고 있다. 국내에서도 온도분포 파악을 통한 아스팔트포장의 효율적인 다짐관리 방안이 필요하고 이에 대한 연구가 현재 수행되고 있다. In resent years, temperature segregation has been identified as one of the most important concepts concerning segregation. An Infrared Camera is one of the tools that have been recognized to be effective in identifying temperature segregation. Several state of USA have recognized the problem and have enacted Specifications, and/or test procedures to eliminate temperature segregation. The major objective of this study is to investigate effective compaction method of hot mix asphalt during road construction using Infrared Camera.

외측대퇴회선동맥 상행가지의 천공지피판을 이용한 대전자부 욕창의 재건

김준형,어수락,조상헌,Kim, Jun-Hyung,Eo, Su-Rak,Cho, Sang-Hun 대한성형외과학회 2010 Archives of Plastic Surgery Vol.37 No.5

Purpose: Trochanteric pressure sores management has been improved through the development of musculocutaneous flaps. But it has many drawbacks such as donor site morbidity and functional muscle sacrifice. With the introduction of perforator flap, it is possible to use in every location where musculocutaneous perforators are present. We have reconstructed trochanteric pressure sores using perforator-based flaps from the ascending branch of lateral circumflex femoral artery. Methods: Between May of 2006 and April of 2008, we performed six cases of perforator-based flap from the ascending branch of lateral circumflex femoral artery for the coverage of trochanteric pressure sores. For identifying perforators, a line was drawn from the anterior superior iliac spine to the superolateral border of the patella as the vertical axis, from the pubis to the trochanteric prominence as the horizontal axis. In the lateral aspect of the intersection of these two axes, various flap were designed according to its defects. The flap was raised in the subcutaneous plane above the fascia and the pedicle was traced by doppler and identified. The pedicle was meticulously dissected not to injure the periadventitial tissues and transposed to the defect. The donor site was closed primarily. Results: The mean age of patients was 56.2 years. Four male and two female patients were studied. Five patients were paraplegic. The mean defect size was $6{\times}4\;cm$. The largest flap dimension was $14{\times}7\;cm$. Donor sites were closed primarily without any complications. All flaps survived completely without necrosis, hematoma or infection. There were no recurrence during the follow-up period. Conclusion: Trochanteric pressure sores using perforator-based flap from the ascending branch of lateral circumflex femoral artery can be performed safely and it would be a reliable option for coverage of trochanteric pressure sores with minimal donor site morbidity.

소아 안면열상 환자의 치료에 있어서 유용한 봉합술

김준형,권순범,어수락,조상헌,Kim, Jun-Hyung,Kwon, Soon-Beom,Eo, Su-Rak,Cho, Sang-Hun,Markowitz, Bernard L. 대한성형외과학회 2010 Archives of Plastic Surgery Vol.37 No.4

Purpose: Lacerations requiring formal wound closure compose a significant number of all childhood injuries presenting to the emergency department. The problem with conventional suture technique are that suture removal is quite cumbersome, especially in children. Unwanted soft tissue damage can result in the process of suture removal, which calls for sedation, stressful for both medical personnel and child. The purpose of this study is to introduce the convenient suture technique for pediatric facial lacerations. Methods: Children under the age of four, presenting to the emergency department with facial lacerations were enrolled in the study. From March 2008 to June 2009, 63 patients (41 males and 22 females) with an average age of 1.4 years were treated with our convenient suture technique using utilized a loop suspended above a double, flat tie. Clean, tension free wounds were treated with our technique, wounds with significant skin defect and concomitant fractures were excluded. Results: The Patients were followed-up in 1, 3 and 5 days postoperatively. On the third hospital visit, suture removal was done by simply cutting the loop suspended above the wound margin and gently pulling the thread with forceps. There were no significant differences in the rates of infection and dehiscence compared with conventional suture technique. Conclusion: The use of our technique was to be simple with similar operative time compared with conventional suture technique. Removal of suture materials were easy without unwanted injuries to the surrounding tissue which resulted in less discomfort for the patient and greater parental satisfaction, minimized the complications. It can be considered as a viable alternative in the repair of pediatric facial lacerations.

비중격 골절을 동반한 단순 비골 골절의 치료에 있어 비중격 교정술의 중요성: 비강 통기도 검사를 이용한 평가

김준형,신동우,최태현,손대구,한기환,Kim, Jun-Hyung,Shin, Dong-Woo,Choi, Tae-Hyun,Son, Dae-Gu,Han, Ki-Hwan 대한성형외과학회 2010 Archives of Plastic Surgery Vol.37 No.5

Purpose: Nasal bone fractures are often classified as minor injury. However, the incidence of posttraumatic nasal deformity remains alarmingly high. It is because of unnoticed septal fracture. This study was conducted to determine the necessity of septoplasty for patients with nasal bone fracture accompanying grade I septal fractures. Methods: Among 105 patients with nasal bone fractures, 52 who had grade I septal fracture were diagnosed based on physical examination and computed tomography. Patients' age ranged from 14 to 65 years (mean 29.25 years), and 35 were male and 17 female. Patients were divided into 2 groups according to surgical treatment methods: patients who underwent closed reduction only (group 1, n=28) and those who underwent simultaneous closed reduction and septoplasty (group 2, n=24). The treatment outcomes were evaluated by comparing changes in nasal airway volume measured by acoustic rhinometry before the surgery, 3 months and 6 months after the surgery according to the timing of surgical repair and surgical treatment methods. Results: Nasal airway volume increased after the surgery by 17.8% in 3 months after the surgery, 25.2% in 6 months in group 1 and by 22.7% in 3 months, 35.8% in 6 months in group 2. The increase in airway volume after the surgery by 26.3% in 3 months after the surgery, 34.2% in 6 months after the surgery in operation within 1 week after trauma and by 12.1% in 3 months, 22.2% in 6 months after the operation later 1 week after trauma. The difference was statistically significant. Three patients in group 1 complained of intermittent nasal obstruction, two of whom showed a decrease in nasal airway volume by acoustic rhinometry. Conclusion: Most patients with nasal bone fractures accompanying grade I septal fractures have been treated with closed reduction in clinical settings. However, the results of this study suggest that septoplasty be performed after a correct diagnosis of septal fracture is made through comprehensive physical examination and computed tomography. Septoplasty is important to obtain more favorable outcomes and reduce complication.

심부하복벽 천공지 유리피판을 이용한 즉시 유방재건술

김준형,박지웅,조상헌,어수락,Kim, Jun-Hyung,Park, Ji-Ung,Cho, Sang-Hun,Eo, Su-Rak 대한미세수술학회 2008 Archives of reconstructive microsurgery Vol.17 No.2

In the past decade, there has been increasing breast reconstructions after mastectomy, and the abdomen has been the gold standard for donor site. TRAM (transverse rectus abdominis myocutaneous), MSTRAM (muscle sparing transverse rectus abdominis myocutaneous), DIEP (deep inferior epigastric artery perforator), SIEA (superficial inferior epigastric artery) flap has been widely used nowadays. Among them, DIEP free flap spares the whole rectus abdominis muscle and anterior rectus sheath resulting in decreased donor site morbidity. Between March of 2006 and February of 2008, six patients had undergone immediate breast reconstructions using DIEP free flap. The mean age of patients was 48.5 years. All patients had unilateral breast reconstructions. We dissected two perforators which were included in the unilateral pedicle. Thoracodorsal artery and its venae comitantes were chosen as recipient vessels. For venous anastomosis, we used the GEM Microvascular Anastomotic Coupler System (Synovis Micro Companies Alliance, Inc., Birmingham, Ala.) in four cases. All flaps were survived completely except one who showed fatty abdomen in old age. She showed repetitive vascular spasm intraoperatively. None of the patients had abdominal hernia, bulge or weakness. We believe that DIEP free flap provides a reliable method for autologous breast reconstruction if the patients are selected appropriately and performed by a skillful surgeon.

딤플을 적용한 평판에 대한 항력 감소 연구

백부근(Bu-Geun Paik),편영식(Young-Sik Pyun),김준형(Jun-Hyung Kim),김경열(Kyung-Youl Kim),김기섭(Kim1 ?Ki-Sup),정철민(Chul-Min Jung),김찬기(Chan-Ki Kim) 대한조선학회 2012 大韓造船學會 論文集 Vol.49 No.4

Pd 첨가량 및 첨가방법이 알코올 센서용 SnO₂ 반도체 후막 특성에 미치는 영향 연구

김준형(Jun-Hyung Kim),김형관(Hyeong-Gwan Kim),이호년(Ho-Nyun Lee),김현종(Hyun-Jong Kim),이희철(Hee-Chul Lee) 한국표면공학회 2017 한국표면공학회지 Vol.50 No.5

In this paper, two methods of making the Pd-added SnO₂ (Pd-SnO₂) powder with pure tetragonal phase by the hydrazine method were suggested and compared in terms of crystal structure, surface morphology, and alcohol gas response. One of the addition methods is to use PdCl₂ as a Pd source, the other is to use Pd-based organic with oleylamine (OAM). When Pd concentration was increased from 0 to 5 wt%, the average grain size of Pd-SnO₂ made with Pd-OAM were decreased from 32 to 12 nm. In the case of using with PdCl2, grain size of the PdCl₂ fell to less than 10 nm. However, agglomerated and extruded surface morphology was observed for the films with Pd addition over 4 wt%. The crack-free Pd-SnO₂ thick films were able to successfully fill the 30 μm gap of patterned Pt electrodes by optimized ink dropping method. Also, the 2 wt% Pd-SnO₂ thick film made with PdCl₂ showed gas responses (Rair/Rgas) of 3.7, 5.7 and 9.0 at alcohol concentrations of 10, 50 and 100 ppm, respectively. On the other hand, the prepared 3 wt% Pd-SnO₂ thick film with Pd-OAM exhibited very excellent responses of 3.4, 6.8 and 12.2 at the equivalent measurement conditions, respectively. The 3 wt% Pd-SnO₂ thick film with Pd-OAM has a specific surface area of 31.39 m²/g.

IoT센서를 활용한 환경을 생각하는 푸드쉐어링 시스템 구현 및 고찰

김준형 ( Jun-hyung Kim ),정민혁 ( Min-hyeok Jeong ),윤호섭 ( Ho-seop Yoon ) 한국정보처리학회 2022 한국정보처리학회 학술대회논문집 Vol.29 No.2

본 프로젝트는 환경오염의 원인 중 하나인 음식물 쓰레기에 주목하여, 공유 문화와 음식물 쓰레기 감소의 목적을 가지고 있는 공유냉장고의 홍보와 애플리케이션 개발을 구현하였다. SNS 확산과 모바일 환경 변화를 이용하여 홍보함과 운영주체의 불명확, 음식물 제공과 폐기의 전반적인 데이터 관리에 대한 운영관리체계의 문제점을 해결하기 위해서 기존의 아날로그 방식에서 사물인터넷(IoT)과 애플리케이션 기반의 디지털 방식으로 전환하고자 하였다.

세그먼트 라이닝 형식의 공동구 상태평가 항목 제안

김준형 ( Kim Jun-hyung ),이동훈 ( Lee Dong-hun ),최병일 ( Choi Byoung-il ),추진호 ( Choo Jin-ho ),노은철 ( Noh Eun-chul ) 한국구조물진단유지관리공학회 2022 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.26 No.2

세부지침 15편의 공동구에 대한 안전점검 및 진단은 박스형식에 국한된 설명을 담고 있다. 이는 공동구 수용시설 중에 전기, 통신, 상수도, 냉·난방을 제외한 경우로 제한적인 경우만을 고려하여 작성되었기 때문이다. 하지만 이러한 수용시설로 인한 제외시설물 또한 정기적인 시설물의 유지관리를 터널 및 공동구 세부지침을 따라 진행하고 있음을 확인하였다. 본 논문에서는 세그먼트 라이닝 형식의 공동구에 대한 상태평가를 위해 세그먼트 라이닝의 특성을 고려할 수 있는 항목과 향후 세부지침 개정시 고려되어야 할 사항들을 제안하고자 한다.