괴사유치(壞死乳齒)의 보존적 처치에 관한 연구

허노정,양정강,Hur, No-Jeong,Yang, Joung-Kang 대한소아치과학회 1975 大韓小兒齒科學會誌 Vol.2 No.1

The conserative treatment of the necrotic and infected primary molars is often necessary in order to avoid extractions which may lead to inability to masticate or loss of space and subsequent problems concerning the development of the occlusion in the permanent dentition. The purpose of this study was to evaluate the clinical significance of the conservative treatment of the infected primary molars with necrotic pulps employing the formocresol pulpotomy technique same as in vital teeth and surgical intervention in the cases with a parulis, fistula or cellulitis. The materials consisted of 25 primary molars of 9 boys and 4 girls ranging in age from 4 to 7 years. This study included clinical and radiographic observation at 3-month intervals postoperatively. The following results were obtained. 1. Clinically, 20 cases of 25 were successful, exhibiting no clinical problems such as fistula, mobility, toothache and tenderness to percussion, etc. 5 cases were regarded as failures. 2. Radiographiclly, 14 cases revealed normal features, in 6 cases slight rarefaction was observed in the periapical and interradicular region, and marked periapical and interradicular rarefaction was observed in 5 cases. 3. Marked bony deposition was observed in the periapical and interradicular regions in all the remainder except for 5 failurese. 4. Pathologic root resorption was observed in 2 cases. 5. No alveolodental ankylosis was observed. 6. Regeneration of the dental sac of the permanent tooth was observed in 1 case of 2 cases which had revealed loss of the dental sac.

Glutaraldehyde 및 Formocresol이 유견유치 치수조직에 미치는 영향에 관한 병리조직학적 연구

허노정 大韓小兒齒科學會 1981 大韓小兒齒科學會誌 Vol.8 No.1

This study was undertaken to evaluate the pulpal responses to the pulp-capping materials such as glutaraldehyde and formocresol in pulpotomy technique, especially in the primary dentition. Mandibular primary canines and molars of 5 dogs(aged about 8-9 weeks)were selected for this study. The intervals of observation for histologic study of pulpotomized primary teeth with 2% glutaraldehyde, formocresol and calcium hydroxide in the usual manner ranged from 2 hours, 1 week, 2 weeks, 3 weeks and 5 weeks after experiments respectively. Each specimens were fixed with 10% formalin and decalcified in 5% nitric acid. All slides were stained with Hematorylin-Eosin and examined histopathologically. The results were as follows; 1. In calcium hydroxide groups, formation of dentin bridge was initiated in 1 week after experiments and completed in 5 weeks after experiments. 2. Formation of dentin bridge was not seen, whereas necrosis of pulp tissue was noted, in formocresol and glutaraldehyde groups. 3. Duration of tissue reactions and tissue changes were similar, in formocresol and glutaralhehyde groups. 4. In formocresol and glutaraldehyde groups, amputation surfaces of the pulp were covered with blood clots, beneath which coagulation necrois was noted, but inflammatory cells were not prominent, in 2 hours and 1 week after experiments. But coagulation necrosis was proceeded to the apical portion, accompanied by infiltration of inflammatory cells, since 2 weeks after experiments. And suppuration or gangrene of the pulp tissue were noted in 3 weeks and 5 weeks groups. 5. Suppuration or gangrene of pulp seemed to provoke the resorption of dentin wall, and inflammatory changes and resorption of roots were noted in the periodontal membrane near the periapical region. 6. As compared with calcium hydroxide groups, resorption of the root was pronounced in formorcresol and glutaraldehyde groups. Effects of medicaments to the succedaneous tooth germ were not seen.

스마트 모니터링 시스템의 배치 방식 분석

허노정 한국인터넷방송통신학회 2010 한국인터넷방송통신학회 논문지 Vol.10 No.6

모니터링 시스템은 특정 영역에서 발생하는 사건을 신속히 보고하여 적절한 대응을 할 수 있도록 해주는 시스템을 말한다. 로봇화된 산업 생산라인의 공정 모니터링에서부터 산불감지, 침입탐지, 스마트그리드, 환경오염 경보에 이르기 까지 다양한 산업군에서 널리 사용되고 있으며 무선통신의 발달과 저가의 센서를 활용가능하게 되면서 센서네트워크로 대표되는 지능형 또는 스마트 모니터링 시스템으로 발전하게 되었다. 모니터링 시스템의 목적이 다양하고 구축비용, 구성 방식, 구축 후 효과 등 많은 부분이 센서 또는 모니터링 디바이스가 설치된 장소에 영향을 받게 되지만 제한된 방식에 대해서만 배치 기법에 대해 관심을 받아 왔다. 모니터링 시스템의 종류에 따라 활용할 수 있는 다양한 방식의 배치 기법을 소개하고 배치 시의 성능을 객관적으로 비교할 수 있는 성능척도들 또한 소개하여 기존의 모니터링 시스템을 평가하고 개선할 수 있는 지점을 확인가능하게 하며 모니터링 시스템 설계 시에도 활용가능하다. 성능 척도는 배치과정에서의 효율성과 배치된 이후의 모니터링 시스템의 유용성을 평가할 수 있어야 한다. 배치과정에서의 효율성은 배치에 소요된 시간, 에너지 소모량, 비용, 안전성, 센서노드 손상율, 확장성(Scalability) 등이며 배치 이후의 모니터링 시스템의 유용성은 목표지역(ROI) 커버리지(Coverage), 연결성(Connectivity), 균일도(Uniformity), 목표 밀도(target density) 유사성, 단위기간 에너지 소모율 등이다. Monitoring systems are able to report certain events at region of interest(ROI) and to take an appropriate action. From industrial product line full of robots to fire detection, intrusion detection, smart grid application, environmental pollution alarm system, monitoring system has widely used in diverse industry sector. Recently, due to advance of wireless communication technology and availability of low cost sensors, intelligent and/or smart monitoring systems such as sensor networks has been developed. Several deployment methods are introduced to meet various monitoring needs and deployment performance criteria are also summarized to be used to identify weak point and be useful at designing monitoring systems. Both efficiency during deployment and usefulness after the deployment should be assessed. Efficiency factors during deployment are elapsed time, energy required, deployment cost, safety, sensor node failure rate, scalability. Usefulness factors after deployment are ROI coverage, connectivity, uniformity, target density similarity, energy consumption rate per unit time and so on.

壤死乳齒의 보존적 처치에 관한 연구

허노정,양정강 大韓小兒齒科學會 1975 大韓小兒齒科學會誌 Vol.2 No.1

The conserative treatment of the necrotic and infected primary molars is often necessary in order to avoid extractions which may lead toinability to masticate or loss of space and subsequent problems concerning the development of the occlusion in the permanent dentition. The purpose of this study was to evaluate the clinical significance of the conservative treatment of the infected primary molars with necrotic pulps employing the formocresol pulpotomy technique same as in vital teeth and surgical intervention in the cases with a parulis, fistula or cellulitis. The materials consisted of 25 primary molars of 9 boys and 4 girls ranging in age from 4 to 7 years. This study included clinical and radiographic observation at 3-month intervals postoperatively. The following results were obtained. 1. Clinically, 20 cases of 25 were successful, exhibiting no clinical problems such as fistula, mobility, toothache and tenderness to percussion, etc. 5 cases were regarded as failures. 2. Radiographiclly, 14 cases revealed normal features, in 6 cases slight rarefaction was observed in the periapical and interradicular region, and marked periapical and interradicular rarefaction was observed in 5 cases. 3. Marked bony deposition was observed in the periapicaland interradicular regions in all the remainder except for 5 failurese. 4. Pathologic root resorption was observed in 2 cases. 5. No alveolodental ankylosis was observed. 6. Regeneration of the dental sac of the permanent tooth was observed in 1 case of 2 cases which had revealed loss of the dental sac.

센서네트워크 연결성 강화를 위한 거점 노드 혼합 배치 기법 연구

허노정(Nojeong Heo) 대한전자공학회 2014 전자공학회논문지 Vol.51 No.6

센서노드를 활용한 응용이 증가함에 따라 센서네트워크의 장기적 운용과 성능을 보장할 수 있는 현실적 배치 문제 해결 기법이 요구되고 있다. 특히 네트워크 연결성은 네트워크 전체 수명에도 영향을 줄 뿐만 아니라 근거리 센싱 정보의 취합 능력에도 직접적인 연관성을 갖는다. 센서네트워크의 구축 시 요구되는 경제적인 이유와 함께 센서 노드가 배치될 필드의 접근성 문제로 임의 배치 기법이 주로 사용되고 있으나 센서노드의 불균일로 인한 연결성 문제, 비효율적 네트워크 구성 등이 발생할 수 있다. 본 논문에서는 초기 배치 노드의 성능을 최대한 활용할 수 있도록 거점 노드의 혼합 배치 기법을 제안한다. 혼합 배치를 통해 기존 센서 노드의 불균형을 완화시키면서 추가되는 혼합 노드의 수를 효과적으로 줄일 수 있는 밀도 분석을 시행하였다. 실험 결과를 통하여 제안하는 기법이 단일 센서노드로 구성된 기존의 배치 방식 보다 좋은 결과를 얻을 수 있음을 보였다. Practical deployment methods for sensor nodes are demanding as applications using sensor nodes increase. In particular, node connectivity is crucial not only for the network longevity but also for direct impacts on sensing and data collection capability. Economic requirement at building sensor networks and often limited access for sensor fields due to hostile environment force to remain at random deployment from air. However, random deployment often result in lost connection problem and inefficient network topology issue due to node irregularity. In this paper, mixed deployment of key nodes that have better communication capability is proposed to support the original deployment into working in an efficient way. Node irregularity is improved by introducing mixed nodes and an efficient mixed node density is also analyzed. Simulation results show that the mixed deployment method has better performance than the existing deployment methods.

근거리 GPS 재밍 공격 탐지 및 영향권 축소 기법

허노정(Nojeong Heo) 제어로봇시스템학회 2012 제어로봇시스템학회 합동학술대회 논문집 Vol.2012 No.7

최근 GPS 재밍에 관한 사례가 지속적으로 보고되고 있으나 근본적인 해결이 쉽지 않아 국제기구를 통한 압박 등 외교전까지 동원할 정도로 심각한 상황이다. GPS 전파신호의 거리에 따른 감쇠 특징 및 원거리 위성신호와의 차이 등을 이용해 재밍 신호를 분별하고 억제하는 방안을 제시한다. 정상적 GPS 신호는 약 20000km 상공의 위성으로부터 오게 되어 감쇠의 정도가 크고 넓은 영역에 비해 신호의 세기가 고른 특징이 있고, GPS 재머는 지상이나 항공에서 강한 신호를 송출하여 감쇠의 정도도 적고 영역에 따라 큰 차이를 갖는 특징이 있다. 정상신호와 교란 신호 간의 신호 특성의 차이를 이용하여 필요이상의 강한 신호를 억제하여 교란되는 영역의 크기를 줄이고, 또 교란된 수신기의 분포를 파악하여 교란원의 위치를 추정하는 방안을 제시한다.

乳齒列에 發生한 과잉치 症例報告

최돈옥,손흥규,이종갑,허노정 大韓小兒齒科學會 1980 大韓小兒齒科學會誌 Vol.7 No.1

The author have observed a case of supernumerary tooth occured between the maxillary right primary central Incisor and lateral incisor. Supernumerary permanent tooth is a common clinical finding, but supernumerary primary tooth is very rare. Supernumerary tooth result from aberrations in the initiation or proliferation period of the life cycle of the tooth.

GPS 재밍 공격 대응 방안 비교 연구

허노정(Nojeong Heo) 제어로봇시스템학회 2011 제어로봇시스템학회 합동학술대회 논문집 Vol.1 No.1

많은 장비들이 정확한 위치 및 시각 정보를 얻기 위해 GPS 신호를 활용하고 있으나, GPS 신호는 원거리에서 보내온 위성 신호를 사용하고 수신된 신호의 세기가 크지 않아 Jamming 공경에 취약하다. 자연적으로 발생하는 GPS 교란 현상뿐만 아니라 악의적인 GPS 재밍 공격에 대응할 수 있는 기술이 지속적으로 요구되어 왔다. 공간 아디버시티를 이용한 재망 감지 기법, 위선신호 개선, 안테나 및 수신기 개선, 위성 이중화, 셀룰라 및 WiFi 망과의 통합. INS(관성항법장치). 모션센서, RFID등의 센서융합방안 등 다양한 대안들을 살펴보고, 각 대안들의 장단점을 기술적 측면 경제적 측면에서 비교해본다.

Development of a Smart Oriental Medical System Using Security Functions

홍유식,윤은준,허노정,Eunju Kim,배영철 한국지능시스템학회 2015 INTERNATIONAL JOURNAL of FUZZY LOGIC and INTELLIGE Vol.14 No.4

In future, hospitals are expected to automatically issue remote transcriptions. Many generalhospitals are planning to encrypt their medical database to secure personal information asmandated by law. The electronic medical record system, picture archiving communicationsystem, and the clinical data warehouse, amongst others, are the preferred targets for whichstronger security is planned. In the near future, medical systems can be assumed to beautomated and connected to remote locations, such as rural areas, and islands. Connectingpatients who are in remote locations to medical complexes that are usually based in larger citiesrequires not only automatic processing, but also a certain amount of security in terms of medicaldata that is of a sensitive and critical nature. Unauthorized access to patients’ transcriptiondata could result in the data being modified, with possible lethal results. Hence, personaland sensitive data on telemedicine and medical information systems should be encrypted toprotect patients from these risks. Login passwords, personal identification information, andbiological information should similarly be protected in a systematic way. This paper proposesthe use of electronic acupuncture with a built-in multi-pad, which has the advantage of beingable to establish a patient’s physical condition, while simultaneously treating the patient withacupuncture. This system implements a sensing pad, amplifier, a small signal drive circuit, anda digital signal processing system, while the use of a built-in fuzzy technique and a controlalgorithm have been proposed for performing analyses.

소셜 네트워크에서 감정단어의 단계별 코사인 유사도 기법을 이용한 추천시스템

권응주,김종우,허노정,강상길 한국엔터프라이즈아키텍처학회 2012 정보기술아키텍처연구 Vol.9 No.3

This paper proposes a system which recommends movies using information from social network services containing personal interest and taste. Method for establishing data is as follows. The system gathers movies’ information from web sites and user’s information from social network services such as Facebook and twitter. The data from social network services is categorized into six steps of emotion level for more accurate processing following users’ emotional states. Gathered data will be established into vector space model which is ideal for analyzing and deducing the information with the system which is suggested in this paper. The existing similarity measurement method for movie recommendation is presentation of vector information about emotion level and similarity measuring method on the coordinates using Cosine measure. The deducing method suggested in this paper is two-phase arithmetic operation as follows. First, using general cosine measurement, the system establishes movies list. Second, using similarity measurement, system decides recommendable movie list by vector operation from the coordinates. After Comparative Experimental Study on the previous recommendation systems and new one , it turned out the new system from this study is more helpful than existing systems. 본 논문에서는 개인의 취향과 관심이 반영 되어있는 소셜 정보를 활용하여 사용자에게 영화를 추천할 수 있는 시스템을 제안하였다. 시스템에서 데이터 구축은 포털사이트에서 영화 정보를 수집하고 페이스북과 트위터 같은 SNS를 통해 소셜 정보를 수집한다. 본 논문에서는 사용자의 감정에 따른 보다 정교한 처리를 위하여 6단계의 감정단계로 분류한 소셜 정보의 벡터공간 모형의 구축방법을 제안한다. 추천을 위한 유사도 측도 방법은 2단계로 구성되어 있다. 첫 번째는 일반적인 코사인 측도를통한 영화 목록의 구축 단계이고, 두 번째는 기존의 코사인 측도(Cosine measure)를 활용한 좌표평면에서 감정 단계별 벡터 정보 표현 방법 및 유사도 측도 방법을 통해 추천 영화 목록의 결정 단계이다. 본 논문의 추천 시스템의 성능을 평가하기 위하여 기존의 추천 시스템과 비교 실험을 통하여 본 연구의 추천 시스템의 유용성을 검증하였다.