CSMA/CA 기반 무전기를 통한 다중가입자 통신 프로토콜

장명진,박성진,Jang, Myung-Jin,Park, Seong-Jin 한국정보통신학회 2010 한국정보통신학회논문지 Vol.14 No.11

현재 우리 군에서 많이 사용하는 PRC-999K 무전기는 반이중전송방식이며 동일망에 가입한 가입자 중 한 가입자가 데이터를 송신하면 나머지 가입자는 모두 데이터를 수신하는 브로드캐스트 빙식이다. 군 사격지휘시스템에서 무선데이터통신은 지휘소와 가입자들 사이에 1:1 유니캐스트 방식을 사용하고, 데이터 충돌을 회피하기 위해 CSMA/CA 기법을 적용하며, 효율적이고 속도가 빠른 SDLC 프로토콜을 사용한다. 본 논문은 데이터 송수신 시간 단축을 위해 각 가입자에게 순차적인 주소를 할당하고 지휘소가 데이터를 1회 브로드캐스팅 하면 지정된 가입자들 이 순차적으로 데이터 충돌을 회피해가며 응답전문을 송신하는 프로토콜과 알고리즘을 제안한다. The PRC-999K radio widely used in Korean Army is half-duplex and also has the broadcasting radio wave character that all subscribers listen when one subscriber speaks in time. The radio data communication system configures a 1:1 unicast network between a command post and network members in a military fire control system. The system also applies CSMA/CA technique to avoid data collision and additionally applies SDLC protocol for efficiency and fast communication. This paper shows that allocating address to network members in serial order can reduce data transmitting/receiving time, and thereby a command post needs to broadcast data only one time and the assigned members can reply in order without data collision. It is validated through an experimental test.

도시환경 디자인 통합을 위한 디자인 개념 추출

장명진(Jang, Myung-Jin),김기환(Kim, Kihwan) 대한건축학회 2010 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.30 No.1(계획계)

이왕직미술품제작소(李王職美術品製作所) 금속화병(金屬花甁)의 제작기법과 특성 연구 -백동금문화병(白銅金文花甁)의 실험분석을 중심으로-

장명진 ( Myung Jin Jang ) 한국화예디자인학회 2015 한국화예디자인학 연구 Vol.33 No.-

이왕직미술품제작소의 금속화병을 살펴보면 두툼한 입술을 가지고 목은 좁고 어깨가 넓으며 완만한 형태의 곡선을 이루며 굽까지 이르는 것을 특징으로 한다. 주요재료로 주석이 활용되었으며, 나전으로 고구려 수렵문을 장식한 화병의 경우 독창적인 제작법과 기술로 발전된 것을 알수 있다. 백동금문화병(白銅金文花甁)은 조선 황실 보급품으로 추정되며 형태와 문양이 섬세하게 조각되어 있다. 황실문양 이화(李花)가 화려한 목련꽃이 잘 조화되어 있다. 주요 재료의 성분으로는 Sn-Pb-Zn-Cu-Ni-Fe-Cr계의 합금으로 확인되었다. 첫째, 전면부 목련꽃의 황색 잎부분에 대한 성분분석결과 황동으로 Cu 70.34%. Pb 15.77%, Zn 7.59%, Sn 3.35%, Ni 0.58%, Fe 0.88%로 구성되어있다. Zn의 함량이 5∼20% 미만으로 붉은 황동(red brass)이 사용되었다. 둘째, 목련 꽃잎의 은색부분은 Ni 함량이 상대적으로 높게 나타났다. Ni이 1.26%로 Ni이 첨가된 황동을 양은(洋銀)이라고도 하며, 은(Ag)과 색조가 비슷하므로 은(Ag) 대용으로 사용된 것을 알수 있다. 셋째, 표면의 특징으로 Cu 68.47%, Cr 1.56%, Fe 0.90%, Ni0.62% 등의 비율로 확인되었다. 특히 Cr 합금 성분은 부식에 견디는 성질을 강화한 소재로 화병의 특성을 고려하여 내식성을 높인 것으로 보인다. When looking at the metal flower vase made by the Craftsmanufacture in Yi Royal Family, it has thick lips, narrow neck, wide shoulder, fluent curves, and it reached for the plate. Tin was utilized as the main ingredient, and when someone sees the vase that’s decorated with the hunting patterns of Goguryeo with nacre, he or she could find out that it has developed with the creative manufacture method and technology. The nickel vase that written gold letters on it, is assumed as the supplies of the Joseon imperial family, and the form and pattern carved delicately. The plum blossoms, which is the pattern of the imperial family and the splendid magnolia harmonized beautifully. The component of the main ingredients is confirmed the ally of the system of the Sn-Pb-Zn-Cu-Ni-Fe-Cr. First, after analyzing the component of the yellow leaf of magnolia of the front side, it consists of brass as Cu 70.34%. Pb 15.77%, Zn 7.59%, Sn 3.35%, Ni 0.58%, Fe 0.88%. The content of the Zn confirmed under the 5∼20%, and the red brass utilized on it. Second, the silver part of the magnolia leaf confirmed that have relatively high N1 as much as 1.26%. The brass that contained N1 called as the nickel silver, and it is used as the substitute of the silver because it has the same tone with silver (Ag). Third, the character of the surface of the metal vase is confirmed as the rate of Cu 68.47%, Pb 15.71%, Zn 8.32%, Sn 3.34, Cr 1.56%, Fe 0.90%, Ni 0.62%. Especially, the component of the Cr alloy was used the material that reinforced the character that standing the corrosion to increase the corrosion resistance by considering the character of the vase.

Implementation of A 30-Channel PCM Telemetry Encoder with A TMS320F2812 DSP Chip

김정섭,장명진,시광규,Kim Jung-Sup,Jang Myung-Jin,Shi Kwang-Gyu The Korean Institute of Communications and Informa 2006 韓國通信學會論文誌 Vol.31 No.9A

There are three critical considerations in developing a PCM telemetry encoder to be installed in an artillery projectile. The first is the performance consideration, such as sampling rate and data transmission rate. The second is the size consideration due to the severely limited installation space in an artillery projectile and the last is the power consumption consideration due to limitations of the munition's power supply. To meet these three considerations, the best alternative is a one-chip solution. Using a commercially available TMS320F2812 DSP, we have implemented a 30-channel PCM telemetry encoder to process randomized data frames, composed of 16-channel analog data, 14-channel digital data and 2-frame synchronization channels per data frame at 10Mbps transmitting baud rate. Artillery projectile에 장착될 PCM 텔레메트리 엔코더 개발에는 크게 세 가지 고려사항이 요구된다. 첫 번째는 샘플링률과 데이터 전송률과 같은 성능에 대한 것이다. 두 번째는 제한된 설치 공간에 따른 크기에 대한 것이고 마지막은 munition의 제한된 전원 공급에 따른 전력 소모에 대한 고려이다. 이러한 세 가지 조건에 맞는 해결책은 한 개의 칩으로 구현하는 것이다. 상용인 TMS320F2812 DSP 칩을 이용해서 프레임당 16채널 아날로그 데이터, 14채널 디지털 데이터와 2개의 프레임 동기 데이터를 랜더마이즈시켜 10Mbps 전송률로 송신하는 30채널 PCM 엔코더를 설계 구현하였다.

한국인 자궁경부암의 복합위험도 추정

윤하정,신애선,박수경,장명진,유근영,Yoon, Ha-Chung,Shin, Ae-Sun,Park, Sue-Kyung,Jang, Myung-Jin,Yoo, Keun-Young 대한예방의학회 2002 예방의학회지 Vol.35 No.3

Objective : This study was aiming at estimating the joint effects of various risk factors associated with uterine cervix cancer in Korea. Methods : Data obtained from a case-control study were analyzed with a multiplicative model. Results : After adjustment for age and husband's educational attainments, the family history of cervical cancer (OR=2.1, 95% CI=1.2-3.9), unstable marital status due to separation, by death or divorce, etc. (OR=2.8, 95% CI=1.7-4.6), and a large number of deliveries ($\geq$3 vs. nulliparous OR=6.5, 55% CI=1.4-29.0) increased the risk of uterine cervix cancer, Conversely, first sexual intercourse at an older age ($\geq$25 years vs. <19 years OR=0.4, 95% CI=0.2-0.6) and husband's circumcision (OR=0.7, 95% CI=0.5-1.0) decreased the risk. In the multiplicative model, the highest joint risk (OR=39.2, 95% CI 5.9-258.9) was observed in women with a family history of uterine cervical cancer, an unstable marital status, where the ex-husband was not circumcised, with 3 or more delivery experiences, and having her first sexual intercourse when younger than 19 years of age. However, women without a family history of uterine cervix cancer, married to a circumcised husband, having had her first sexual intercourse at 25 years or older, and nulliparous, showed the lowest joint effect (OR=0.3, 95% CI=0.1-0.5). Conclusion : As carcinogenesis is a complex action involving various factors, we consider a joint effects approach to be appropriate in an epidemiological study on risk factors for uterine cervix neoplasms cervix neoplasm.

Pterygopalatin fossa 로 전위된 상악 매복지치 발치 치험례

김용관(Yong Kwan Kim),장명진(Myung Jin Jang),장현석(Hyun Suk Jang) 대한악안면성형재건외과학회 1994 Maxillofacial Plastic Reconstructive Surgery Vol.16 No.2

The surgical removal of the wisdom teeth is obligate when forceps extraction fails or when the wisdom teeth are impacted. The surgical removal of impacted maxillary third molars is a commonly performed procedure usually associated with few complications & little morbidity. The most frequent complications are tooth root fracture, maxillary tuberosity fracture, tooth displacement into the maxillary sinus & oroantral fistula formation. A rarely reported complication is the displacement of a tooth into the infratemporal fossa. The method of prevention of this complication is by the placement of either a finger or periosteal elevator posterior to the tooth during extraction. To remove the disploaced upper third molar is very difficult & has many complications, e.g., persistent bleeding k nerve damage. When the wisdom teeth is displaced, it is initially necessary to gain access to bone by developing a mucoperiosteal flap. Adequate access to the tooth is then achieved by conservative removal of bone. Finally, an unimpeded path of delivery is developed by additional bone removal or, preferably planned sectioning of the tooth. There are many approaching techniques to remove the displaced upper third molar. This following report describes the surgical technique of displaced upper third molar in the pterygopalatine fossa by the midpalatal & transpharyngeal approach.

고압산소치료의 구강악안면영역에서의 임상적 이용에 관한 연구

류정호,엄기훈,배준수,유준영,장명진,김용관,Lyoo, Jung-Ho,Um, Ki-Hun,Bae, Jun-Su,You, Jun-Young,Jang, Myung-Jin,Kim, Yong Kwan 대한구강악안면외과학회 2001 대한구강악안면외과학회지 Vol.27 No.5

Hyperbaric oxygen therapy(HBO) is defined as breathing 100% oxygen while in an enclosed system pressurized to greater than on atmosphere(sea level). This increased oxygen delivery furthers your body's ability to kill germs and to increase healing. HBO is a supplemental therapy to be used in addition to the current medical and surgical therapy you are receiving. HBO typically is used to complement treatments of medical problems such as bone infections, complication of radiotherapy, and certain chronic, non-healing wounds. On an emergency basis, the chamber also is used to treat problems such as carbon monoxide poisoning and the decompression sickness. We analysed stastically cases which are treated by hyperbaric oxygen therapy in point of oral and maxillofacial region on the Kangnam General Hospital for aid in comprehension and application of this therapy. Total 760 patients were treated at Gangnam General Hospital from July 1996 to September 1999. They were classified by region to Decompression sickness(DCS), Carbon monoxide poisoning(CO), General surgery(GS), Orthopedics(OS), Oral and Maxillofacial surgery(OMFS), others. Patients of Oral and Maxillofacial surgery were divided by diseses to Osteomyelitis, Osteoradionecrosis, Reconstruction, Bone graft, Difficult wounds, others. The results were as follows. 1. This institute conducts HBO therapy for DCS which takes up 62% and 10.5% for OMF region. 2. In OMF region, Osteomyelitis is 40%, Osteoradionecrosis is next, Bone graft, and Reconstruction is a row. 3. According to our precious study, HBO has been frequently conducted in OMF region compared to past, however, it is less actively conducted in this area for research than other conturies. Therefore, We need further application to the clinical use.

하순에 발생한 소낭포성 부속기 암종(Microcystic Adnexal carcinoma)의 치험례

장현석(Chang Hyun Suk),정무혁(Chung Moo Hyeok),장명진(Jang Myung Jin),김용관(Kim Yong Kwan),윤영호(Yoon Young Ho),박영욱(Park Young Yook) 대한구강악안면외과학회 1995 대한구강악안면외과학회지 Vol.21 No.3

Microcystic adnexal carcinoma(MAC) is a relatively uncommon tumor which was first described by Goldstern et al. In 1982 as most commonly presenting facial plaque or nodule. This slow-growing tumor is highly invasive, locally aggressive and deeply infiltrating neoplasm that has recently been recognized as a distinct clincopathologic entity. Microcystic adnexal carcinoma(MAC) is characterized by follicular and sweat gland differentiation and a stroma of dense collagen. Histologically the tumor shows solid islands and strands of squamous cells and sparse small ductal structures, some of them containing central cores of dense eosinophilic keratin. All of them are embedded in a sclerotic stroma. Microcystic adnexal carcinoma is nondescriptive and may be mistaken microscopically for other benign and malignant entities. Microscopically the tumor shows both pilar and sweat gland differentiation and involves the entire dermis and subcutaneous tissue, and invading perineural spaces. The tumor cells involve neryes perineurally or intraneurally. And they frequently extend into underlying structures such as muscle, fat, and bone. Although local recurrences are common after standard surgical excision, metastases have not been reported. Extensive resection of lesions may be necessary to extirpate widespread tumor, particularly those that are long standing or recurrent. Since significantly increasd morbidity is associated with recurrent disease, surgical and histopathologic techniques that stress examination of all margins are indispensable. A 52-year-old male complaining recurrent ulcer formation of the lower lip during past 15 years came to Dept. of Oral and Maxillofacial Surgery, Kangnam General Hospital for the diagnosis of the lip lesion. The incisional biopsy result was the microcystic adnexal carcinoma of the lower lip. As a treatment method we performed V-shaped local wide resection of the lesion and direct closure. Wde followed up the patient for 17 months after surgery. The patient did not show recurrent sign. We report this rare case of microcystic adnexal carcinoma of the lower lip with the review of literatures.

유선형 레이돔 외부장착물에 대한 항력 예측

이대일(Dae Il Lee),김동하(Dong Ha Kim),배중헌(Joong Hun Bae),장명진(Myung Jin Jang),권건섭(Kun Sup Kwon) 한국항공우주학회 2016 한국항공우주학회 학술발표회 논문집 Vol.2016 No.11

우리나라에서 관동맥질환을 진단하는 약물부하 심근관류 SPECT의 비효용과 성능 : 운동부하심전도와 관동맥조영술과 비교

이동수(Dong Soo Lee),강건욱(Keon Wook Kang),장명진(Myung Jin Jang),천기정(Gi Jeong Cheon),이명묵(Myoung Mook Lee),정준기(June Key Chung),이명철(Myung Chul Lee) 대한핵의학회 2000 핵의학 분자영상 Vol.34 No.3

N/A Purpose: Cost-effectiveness of myocardial SPECT f'or the diagniosis of coronary artery disease was investigated considering the present and amended costs of myocardial SPECT and exercise ECG in Korea. Materials and Methods: Four diagnostic tactics such as 1) coronary angiography (CAG) after exercise ECG, 2) CAG after myocardial SPECT, 3) direct CAG, and 4) CAG after myocardial SPECT following exercise ECG were chosen. Costs were calculated using the present costs of various tests and effects represented by Quality Adjusted Life Year (QALY) were estimated. Difference of QALY (ΔQALY) was calculated by subtracting QALY of diagnosed/treated cases from QALY of undiagnosed cases, Cost/Δ QALY was calculated and compared between four different tactics according to pre-test probability, Results: When pre-test probability was equal to or larger than 0.6, direct CAG was the most cost-effective. When pre-test probability was between 0.2 and 0.6, CAG after myocardial SPECT following exercise ECG was the most cost-effective. CAG after myocardial SPECT was the second most cost-effective. Cost-effectiveness was similar when the costs of exercise ECG were doubled or quadrupled. CAG after exercise ECG was always the least cost-effective, Conclusion: Myocardial SPECT with or without preceding exercise ECG was the most cost-effective method to diagnose coronary artery disease in the present or expected amended cost system. (Korean J Nucl Med 2000;34:207-21)