무선 센서 네트워크에서 싱크노드와 인접한 노드의 균등한 에너지 소모를 위한 클러스터링 알고리즘

정진욱,진교홍,Jung, Jin-Wook,Jin, Kyo-Hong 한국정보통신학회 2008 한국정보통신학회논문지 Vol.12 No.6

무선 센서 네트워크의 클러스터링(Clustering)기법은 센서 노드의 에너지 소모를 최소화하기 위한 목적으로 개발되어 Network Lifetime을 증대시키는 효과를 보인다. 기존의 클러스터링 기법들은 센서 노드들이 CH(Cluster Head) 역할을 교대로 수행함으로써 각 노드의 에너지 소모를 균등하도록 하여 Network Lifetime을 향상시키는 방법을 제안하였지만, 싱크(Sink) 노드와 인접한 노드들의 에너지 소모를 최소화하는 방안은 제시하지 못했다. 본 논문에서는 싱크 노드의 POS(Personal Operating Space)내에 존재하는 인접 노드들의 일부를 클러스터의 멤버(Member) 노드로 가입시키지 않고, 직접 싱크 노드와 통신하게 함으로써 싱크 노드와 인접한 CH의 에너지 소모를 줄여 Network Lifetime을 연장하는 클러스터링 알고리즘을 제안하였다. Clustering techniques, which are algorithm to increase the network lifetime in wireless sensor networks, is developed to minimize the energy consumption of nodes. Existing clustering techniques by to increase the network lifetime with equalizing each node's the energy consumption by rotating the role of CH(Cluster Head), but these algorithms did not present the solution that minimizes the energy consumption of neighboring nodes with sink. In this paper, we propose the clustering algorithm that prolongs the network lifetime by not including a part of nodes in POS(Personal Operating Space) of the sink in a cluster and communicating with sink directly to reduce the energy consumption of CH closed to sink.

감염된 만성창상에서 국소음압세척치료의 이용

정진욱,김준형,정영진,박무식,손대구,한기환,Jeong, Jin-Wook,Kim, Jun-Hyung,Jung, Yung-Jin,Park, Mu-Sik,Son, Dae-Gu,Han, Ki-Hwan 대한성형외과학회 2010 Archives of Plastic Surgery Vol.37 No.3

Purpose: Continuous irrigation method is an important step in managing wound infection. V.A.C. devices have been used in intractable wounds for reducing discharge, improving local blood flow, and promoting healthy granulation tissue. We expect synergistic effects of reduced infection and more satisfactory, accelerated wound healing when using both methods simultaneously. This study evaluated continuous irrigation combined with V.A.C. appliance for treatment of infected chronic wounds. Methods: We reviewed data from 17 patients with infected intractable chronic wounds. V.A.C. device (Group A) was used in 9 patients, and V.A.C. with antibiotics irrigation (Group B) was used in 8 patients. We placed Mepitel$^{(R)}$ on the surface of wound and placed an irrigation and aspiration tube on each side. A sponge was placed on the Mepitel$^{(R)}$ and covered with film dressing. The wound was irrigated continuously with mixed antibiotics solution at the speed of 200 cc/hr and aspirated through the wall suction at the pressure of -125 mmHg. V.A.C. applied time, wound culture and wound size were compared between the two groups. Results: No complication were seen in two groups. Compared with Group A, in the Group B, V.A.C. applied time was shortened from 32.7 days to 25.6 days and showed efficacy in the reduction rate of wound size. No statistical differences were shown in bacterial reversion. Conclusion: V.A.C. appliance with continuous irrigation is an effective new method of managing infected chronic wounds and useful to reduce treatment duration and decrease wound size. Moreover it could be applied more widely to infected wound.

하악에 발생한 중심성 거대세포육아종의 치험례

정진욱,오득영,서제원,문석호,이중호,이종원,안상태,김창현,Chung, Jin-Wook,Oh, Deuk-Young,Seo, Je-Won,Moon, Suk-Ho,Lee, Jung-Ho,Rhie, Jong-Won,Ahn, Sang-Tae,Kim, Chang-Hyun 대한성형외과학회 2010 Archives of Plastic Surgery Vol.37 No.5

Purpose: Central giant cell granuloma is a rare, benign giant cell tumor which commonly develops in areas near the teeth. It accounts for approximately less than 7% of benign tumors of the mandible. Clinically, central giant cell granuloma is classifed into aggressive and non-aggressive type, and usually requires surgical treatment. There has been no report of central giant cell granuloma in plastic surgery field of the country, and we report a case with a brief review of the diagnosis and treatment of the disease. Methods: A 23-year-old male presented with a hard, non-tender, growing mass with the size of $4.0{\times}3.0\;cm$ on mandible for several months. Computed tomography scan showed a solid mass within thinned outer cortex on mandible. The thinned outer cortex was excised with the mass and the inner cortex was partially removed burring. After the tumor removal, mandible was fixed by reconstruction plate. Results: Pathologic report showed numerous large multinucleated giant cells, diffusely distributed in a background of ovoid-to-spindle-shaped mononuclear cells. There was no evidence of recurrence after 1 year follow up. Bony defect was regenerated and we removed the reconstruction plate. Conclusion: Removal of central giant cell granuloma results in defect of outer cortex, which can be reconstructed by using reconstruction plate, autologous bone graft or bone cement. We used reconstruction plate as a conservative method to induce secondary healing of the outer cortical defect area, which resulted in normal mastication and occlusion with no recurrence.

저출력 RFID 시스템에서 인식거리 확대를 위한 전력 공급용 RF Shower 시스템

鄭珍旭(Jin-Wook Jung),裵宰賢(Jae-Hyun Bae),吳夏嶺(Ha-Ryoung Oh),成榮洛(Yeong-Rak Seong),宋昊俊(Ho-Jun Song),張炳埈(장병준),崔炅(Kyung Choi),李政錫(Jung-Suk Lee),李弘倍(Hong-Bae Lee),李學龍(Hak-Yong Lee),金鍾旻(Jong-Min Kim),申在澈(Jae-Che 대한전기학회 2006 전기학회논문지 D Vol.55 No.12

In this paper, we presented the synchronization module between RF shower system and RFID Reader to extend interrogating range on Mobile RFID system, Costas Loop and FPLL(Frequency/Phase Lock Loop) were used. We achieved compromised range of 3㎒ locking frequency, 1㎳ locking time and figured out remarkable Hopping frequency of the Reader. The prototype of the new designed RFID system has been tested with ISO18000-6 type-B Tag. The read range between designed RFID Reader and Tag has been measured, it increased triple times by adjusting the Shower system output level.

Analysis of Scout images for Dose modulation

정진욱(Jin Wook Jung),김동주(Dong Jwo Kim),정다희(Da Hyi Jeong),신광철(Kwang Chul Shin),안종진(Jong Jin Ahn),유상재(Sang Jae Yoo),김동성(Dong Sung Kim) 대한CT영상기술학회 2013 대한CT영상기술학회지 Vol.15 No.1

목적: 본 연구의 목적은 Scout 영상이 Dose modulation에 미치는 영향을 분석하여 효과적인 Scout영상의 획득방법을 제시 하고자 한다. 대상 및 방법: Anthropomorphic phantom을 서로 다른 4가지 장비(1.GE; Discovery HD750, 2.Philips; Ingenuity, 3.SIEMENS; Definition, 4.Toshiba; Aquillion) 를 이용하여 다양한 노출 조건(80~140kvp, 10~50mA)을 설정하여 Scout 영상을 얻어 각각의 dose modulation의 특징을 분석하였다. 또한 임상에서 Scout 영상을 획득할 때 나타날 수 있는 여러 가지 상황(Tube position, Table위치, 환자 위치, foreign body, Scan direction, Scout lack)을 고려하여 시나리오를 구성하고 이에 따른 변화를 분석하였다. 결과: G사의 경우 Scout 영상의 80kVp와 10mA를 사용시 불안정 하여 선량이 증가 되었고120kVp와 30mA에서 안정적인 Dose modulation을 나타냈다. P, S, T사의 경우 kVp와 mA변화에 따른 영향이 없었고 120kVp에서 안정적인 Dose modulation을 나타냈다. 또한 4가지 장비 모두 Scout kVp와 Scan kVp와의 연관성은 없었다. Scout scenario는 G사의 경우 Bismuth포함, Table up-down, Tube position에서 차이를 보였고 P사의 경우 Tube position, Scout lack 6.6cm, 환자 중심이동에서 차이를 보였다. S사의 경우 Table 4cm updown, Tube position, Scan direction에서 차이가 나타났고 T사의 경우 Bismuth포함, Table 4cm up-down, Tube position(bottom, Lat), 환자 중심이동을 제외한 이외의 항목에서는 큰 변화는 없었다. 결론: CT scout 촬영의 검사 조건에 따라 dose modulation은 다양한 변화가 있으며 각 장비 회사 별로 특징을 파악하고 검사 목적에 따라 세부적인 Scout protocol 관리가 필요하다. Purpose: The purpose of this study is to analyze scout images for dose modulation by using anthropomorphic chest phantom and plan to establish an effective guideline for CT scout images. Materials and methods: Four different MDCT: GE(Discovery), Philips(Ingenuity), Siemens(Definition), Toshiba(Aquillion) were used for this study. Anthropomorphic chest phantom was scanned at various kVp, mA (80~140kVp and 10~50mA) with dose modulation for scout images. Also various scenarios (Tube position, table level, patient position, scan direction, scout lack, and foreign body) were planned considering clinical circumstance and obtained analyzed dose modulation data. Results: Despite a no significant difference in dose modulation by using variety of scout energy ranging from 80kvp~140kVp to 10mA~50mA excepting GE (80kvp and 10mA), we can find 120kVp scout is much better stable than the others during phantom experiments. The results of scenarios, GE: bismuth, table up-down, tube position showed significantly different dose modulation others were not. Philips: scout lack and patient position showed differences. Siemens: table up- down, tube position, scan direction showed differences. In Toshiba bismuth table up- down, tube position (bottom, Lat), patient position showed differences Conclusion: According to CT Scout scan conditions, Dose modulation show wide variation. Therefore we recommend research characteristics of each machines and scout protocol management is required.

한·일 가면무의 미학적 가치인식

정진욱(Jung Jin wook) 한국체육철학회 1997 움직임의철학 : 한국체육철학회지 Vol.5 No.1

This study was conducted to present the general view of the understanding of Korean and Japanese masked dance, to make a comparative analysis of what changes both Korean and Japanese masked dance, which has succeeded to its view of popularized dance and had been spontaneously generated, showed amid each of their cultures to require into differences and similarities and to comprehend what was the property of dance in Korean masked dance. As a result, it is thought that the national characteristic inherent in aggregate theatrical art and the family hereditary system coming from Japanese self-pride in Japanese masked dance are the points that we will have to introduce in Korea. And we should make an effort to devise many new dance language in a diversity of dance movements without satisfaction with the present situation of our masked dance. As effort will have to allow younger generations to comprehend our traditional dance, which has been neglected, by making its application suitable to our schooling spot. And they should be allowed to understand that our traditional dance has a social educational spot because of the historical expression of the spirits of human and satires and emotions that masked dance exhibits in reality. Accordingly, it is necessary to make a correct understanding and self-awakening of Korean and Japanese masked dance.

모바일 RFID 리더용 순방향 방향성 (Forward Coupler) 결합기의 설계에 관한 연구

정진욱(Jin-Wook Jung),내관규(Kwan-Kyu Nae),김성호(Sung-Ho Kim),장병준(Byung-Jun Jang),송호준(Ho-Jun Song),박준석(Jun-Seok Park) 한국통신학회 2006 한국통신학회 학술대회논문집 Vol.2006 No.7

켈로이드 환자 233예에 대한 임상적 연구

정진욱(Jin Wook Jung),원영호(Young Ho Won),전인기(Inn Ki Chun) 대한피부과학회 1995 大韓皮膚科學會誌 Vol.33 No.3

Background : Keloids may occur at any age, but tend tend velop between the ages of 10 and 30. The incidence and median age of onset are equal for both sexes. Keloids are common among the darker pigmented rices, but there have been a few clinia studies of keloids in Korea. Objective : The purpcse of this study was to evaluate the variable clinical characteristics of keloids in Korea. Methods : This clinical investigation was made with 223 of patients of keloid who had visited the Department of Derrnatology, Chonnam University Hosptal from January 1984 to December 1993. Results : 1.The annual incidenie averaged over 10 years was 0.831 (361 cases of total 43,752 outpatients). 2.The ratio of rnale t female was 1: 0.94(Male. 115, Feila 108). 3.The mean age of the onset and at the first visit to our hospital were 24.5years and 29.2 years respectively. 4.In our series tte presternal area was the most commor saes, the shouder region next. Most keloids on the shoulder were related to BCG vaccination in ifoncy or chilhood. 5.The precipitating fa ctors associated with keloid were riaeeding dermatologic diseases(33.2 %), unknown(17.9%) rejection & vaccination(15.2%), operation(13.9%), burn(13.9%) and laceration(5.8%) in descending order. 6.Among preceeding as, iociated dermatologic diseases, acne w s the most common. 7. A positive family history is more likely in cases of mitile keloidal (p<0,001), and severe keloidal formation. 8.Most patients did not. complain of any symptorns(45.3%) nd a symptom of pain or tenderness(40.8%) was piesert rather than pruritus(13.9%). 9.The most prevaent tr eatment modality was intralesional injection with triamcinolone acetonide (84.3%). Conclusion : According, to this study, usually keloids occore in patients between 10 and 29 years of age, and most keloids were located on the antetio partion of the chest, shoulders, and face and scalp. A positive family history is more likely in as of multiple, severe keloidal for mation. (Kor J Dermatol 1995;33(3): 489-498)

나노 광촉매 파우더 제조 및 활성도 조사 연구

정진욱(Jung, Jin-Wook),김종훈(Kim, Jong-Hoon),김화중(Kim, Wha-Jung) 한국콘크리트학회 2007 한국콘크리트학회 학술대회 논문집 Vol.2007 No.11

IEEE 802.11a 무선 LAN의 MAC 계층 DCF 처리율 분석

정진욱(Jin-Wook Jung),하은실(Eun-Sil Ha),이하철(Ha-Chul Lee) 한국멀티미디어학회 2005 멀티미디어학회논문지 Vol.8 No.4