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%).

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.

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.

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.

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.

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

인터넷게임장애 환자에서 자기상에 대한 양가감정의 특성

김준형(Jun-Hyung Kim),김민경(Min-Kyeong Kim),정영훈(Young Hoon Jung),신유빈(Yu-Bin Shin),김병훈(Byung-Hoon Kim),김은주(Eun Joo Kim),김재진(Jae-Jin Kim) 한국중독정신의학회 2018 중독정신의학 Vol.22 No.1

Objective : This study aimed to evaluate the characteristics of ambivalence of self-image and its relationship with other characteristics in patients with an internet gaming disorder (IGD). Methods : The level of ambivalence of actual and ideal self-image was evaluated numerically in 20 patients diagnosed with IGD as well as 22 normal controls. The ambivalence scores of the two groups were compared, and their correlations with psychometric scales were counted in each group. Results : Patients with IGD showed a significantly higher level in ambivalence of ideal self-image than did the controls, but not in their ambivalence of actual self-image. Both the actual and ideal ambivalence scores in the IGD group did not have a significant correlation with each other or other scales. In the control group, however, there were significant correlations of the actual ambivalence score and the ideal ambivalence score with the scales representing the level of self-esteem, self-concept clarity, impulsivity, basic psychological needs (autonomy, competence, relatedness), and of the ideal ambivalence score with the scales representing the level of impulsivity, situational motivation (amotivation, external regulation) and basic psychological needs (competence). Conclusion : This study suggested that patients with IGD might feel more intense ambivalence of ideal self-image and patients with IGD independently possess ambivalence of self-image.

소득계층별 자가소유의 자산증대 효과

김준형(Jun-Hyung Kim),최막중(Mack-Joong Choi) 韓國住宅學會 2010 주택연구 Vol.18 No.1

저소득층 주거문제의 해결방식은 크게 임차를 지원하는 방식과 자가소유를 지원하는 방식으로 구분할 수 있다. 이 중 어떠한 방식을 선택하는지는 나라나 시기에 따라 차이를 보이는데, 최근 일부 국가에서는 저소득층의 자산을 효과적으로 증가시킬 수 있는 수단으로서 자가소유가 촉진되고 있다. 본 연구는 자가소유가 저소득가구의 자산증대에 기여하는 정도를 실증분석함으로써, 과연 저소득가구의 자산축적 관점에서 볼 때 국내에서 자가소유를 지원하는 것이 적절한 정책대안이 될 수 있는지를 가늠하는데 그 목적이 있다. 가구패널자료인 KLIPS를 이용, 자가소유기간이 가구의 순자산 변화 및 규모에 미치는 영향을 분석한 결과, 국내에서 자가소유는 고소득가구뿐만 아니라 저소득가구에게도 자산축적의 기회를 효과적으로 제공하고 있음을 알 수 있다. 초기 자산규모를 고려한 연간 자산증대 효과에 있어서는 오히려 저소득가구가 자가소유에 따른 혜택을 상대적으로 더 많이 받고 있는 것으로 나타난다. 나아가 금융자산 등 다양한 자산증식수단을 가진 고소득가구와 달리 저소득층에 있어 자산축적의 수단은 자가소유로 한정되어 있다는 사실 또한 발견된다. 이와 같은 결과에 기초할 때, 우리나라의 주택정책은 향후 자가에 대한 저소득가구의 접근성을 개선하는데 보다 더 많은 노력을 기울여야 할 것으로 판단된다. This paper empirically analyses an effect of homeownership on wealth accumulation by income strata in order to provide a criterion to evaluate two different approaches to cope with housing problems of low-income households: to support a stable tenant status or to promote homeownership. Both regression and panel analyses based upon Korean Labor and Income Panel Study (KLIPS) data show that homeownership significantly contributes to wealth accumulation throughout all income strata, including the lowest stratum. It is also found that homeownership is the only feasible means of wealth accumulation for low-income households. Based upon the results, it is recommended that the Korean housing policy need to focus more on enhancing the accessibility to homeownership for low-income households.

포장가속시험을 통한 개질아스팔트 혼합물의 소성변형 저항성 평가 연구

김준형(Kim Jun Hyung),서영찬(Suh Young Chan),권수안(Kwon Soo Ahn),조용주(Cho Yong Ju) 대한토목학회 2006 대한토목학회논문집 D Vol.26 No.2D

본 연구에서는 국내에서 개발된 Full-Scale 포장가속시험기(HAPT; Hanyang Accelerated Pavement Tester)를 소개하고, 이 시험의 시험운영과 함께 개질아스팔트 혼합물과 일반 밀입도 아스팔트 혼합물의 소성변형 저항성 비교 연구를 수행하였다. 포장가속시험은 일반 밀입도와 3종의 개질아스팔트 각각에 대해 3가지 온도조건(25-30, 40, 50℃)에서 소성변형 저항성을 평가하였으며, 이 평가 결과들은 DSR실험등 바인더의 실내실험 결괴들과도 비교하였다. 포장가속시험을 통한 소성변형 발생량을 분석한 결과, 시험 대상이 된 모든 개질아스팔트 구간에서 일반 밀입도에 비해 소성변형 저항성이 큰 것으로 나타났다. 특히 고온조건에서는 그 차이가 매우 크게 나타났다. 일반 밀입도 아스팔트포장을 대상으로 포장온도 증가에 따른 소성변형 저항성을 분석한 결과 온도가 어느 이상 되면 소성변형 저항성이 급격히 떨어짐을 알 수 있었다. 또한 소성변형에 관련한 중요한 인자로 제시되는 G*/sinδ는 소성변형 저항성을 잘 나타내고 있는 것으로 나타났다. 반면에 회복탄성계수는 소성변형 저항성을 나타내는 인자로 바람직하지 않음도 확인하였다. The objective of this study is to introduce the development of the first Korean full-scale APT(Accelerated Pavement Tester) and to compare the performances of general dense grade asphalt mixture and modified asphalt mixtures as the first running of the tester. The tests evaluated the rutting resistance for dense grade mixture and three different modified asphalt mixture under three different temperature conditions (25-30, 40, 50℃). The results of the testing were compared with the laboratory test results. Results of the tests indicated that the all the modified asphalt sections showed higher rutting resistance than the dense grade section. Especially, the difference was more noticeable at higher temperature condition. Additionally, G*/sinδ is found out to be an important factor for permanent deformation prediction whereas the resilient modulus was not.