Denta $Scan^R$을 이용한 즉시 임플랜트 시술시 최적의 식립 위치 대한 통계적 연구

신광호,이재봉,황병남,Shin, Kwang-Ho,Lee, Jai-Bong,Hwang, Byung-Nam 대한치과보철학회 2000 대한치과보철학회지 Vol.38 No.4

Purpose : The purpose of this study was to determine proper position and angulation of an implant for immediate implantation. Materials and Method : From the years 1997 to 2000. 52 Denta $scan^R$ views, 22 upper and 32 lower jaw with an average age of 43 and 40 respectively, were investigated, which comprise intact upper and lower 6 anterior teeth and premolars. On the Denta $scan^R$, the optimal placement for the immediated implantation was simulated. The measuring methods included 1) Angulation difference between tooth long axis and alveolar bone process. 2) Angulation difference of long axis between tooth and installing fixture 3) Distance between center of tooth at cervical area and center of fixture. 4) Distance from root apex to the bone limit of vital structure. One sample t-test was used for statistical analysis. Result : The results were as follows. 1) At the maxillary central incisor and lateral incisor, angulation difference of long axis between tooth and installing fixture was respectively 0.5 and 3.2 degrees with the fixture center's palatally positioned 2mm apart from tooth center. 2) At the lower anterior 6 teeth, that was about $-2.8^{\circ}\;to\;-4.6^{\circ}$ with the fixture center's lingually positioned 1mm apart from tooth center. 3) At the maxillary canine and premolar, that was respectively $11.8^{\circ}\;and \;7.2^{\circ}$ with the fixture center palatally positioned $2\sim2.4mm$ apart from tooth center. 4) At the lower premolar area, that was about $0^{\circ}\;to\;2^{\circ}$ with the fixture center's lingually positioned $0.5{\sim}1mm$ apart from tooth center. 5) Distance from root apex to the bone limit of vital structure, at the maxillary anterior and premolars. was the range of 10 to 12mm, and at the mandibular anterior teeth and the 1st premolar, that was the range of 18 to 20mm. Conclusion : The proper implant position of maxillary anterior and premolar teeth is as paralleled as or more buccally angulated than long axis of tooth with the fixture center's palatally positioned. In mandiblular anterior region, long axis of implants is lingully angulated compared with long axis of tooth and in premolar, almost parelleled with long axis of tooth and alveolar process.

A Study for the isolation of the Berberine-type Alkaloid from Coptidis Rhizoma and for their Antitumor Activities

신광호,안덕균,우은란,이은주,이재성,Shin, Kwhang-Ho,Ahn, Duk-Kyun,Woo, Eun-Ran,Lee, Eun-Ju,Rhee, Jae-Seong The Society of Korean Medicine 1997 대한한의학회지 Vol.18 No.1

The purpose of this study is the separation of biologically active ingredients from Coptidis Rhizoma which has been widely used as one of oriental herbal medicine for body fever. In this study, berberine-type alkaloids were tested on their biological activities in the aspect of antibacterial, antitumor, anti-herpetic and anti-HIV activity. Contents of five major alkaloids for the various origin of Coptidis Rhizoma were assayed by HPLC. As the results, the content of berberine from Coptis chinensis and Coptis japonica were 6.78% and 7.09%, respectively. The contents of coptisine, jatrorrhizine, berberastine from Coptis chinensis were higher than those of Coptis japonica. The amount of palmatine from both species were almost the same. Surprisingly for antitumor experiment, all compounds have been shown remarkable activity, especially against SNU-l(human stomach cancer) cell line. Among the compounds purified through column chromatography, palmatine, coptisine, and jatrorrhizine inhibited the growth of K-562(human chronic myelogenous leukemia) cell line whereas jatrorrhizine has been shown the effective inhibition of A-549 (human lung) cell line at the same time.

MIM 공법 적용 커넥터 금형 가공용 방전 전극 개발

신광호,전용준,허영무,Shin, Kwang-Ho,Jeon, Yong-Jun,Heo, Young-Moo 한국금형공학회 2014 한국금형공학회지 Vol.8 No.2

A discharge electrode plays a role of shaving off workpiece with spark generated by current in discharge machining. Accordingly, for the discharge electrode, an electrode with excellent wear resistance is necessary. Generally, Graphite and Cu are used as the materials of the electrode, and recently Cu-W is mainly used as an electrode with excellent wear resistance. However, the form of the electrode generally used is produced mostly using cutting work, so a lot of costs incur if several similar forms are needed. Thus, this study developed a Cu-W electrode using Metal Injection Molding (MIM) process to produce similar forms with excellent productivity and a great quantity of electrodes in a similar form in discharge machining and carried out a discharge machining test. In developing an electrode applying MIM, predicting contraction of a product in a sintering process, a mold expansion ratio of 1.29486 was given, but the actual product showed a percentage of contraction 24% to 32%, which showed a difference of 3% to 5%. In addition, to verify wear resistance of the discharge electrode, abrasion loss was measured after the discharge.

Dexamethasone과 Naproxen 병용투여가 하악 제3대구치 발거 후 증상에 미치는 영향에 관한 임상적 연구

신광호,이정근,황병남,Shin, Kwang-Ho,Lee, Jeong-Keun,Hwang, Byung-Nam 대한구강악안면외과학회 2001 대한구강악안면외과학회지 Vol.27 No.1

PURPOSE : The Purpose of this study was to investigate the anti-inflammatory effect on combination dosage of dexamethasone and naproxen after removal of impacted 3rd molars. We evaluated postoperative pain, swelling, and mouth opening limitation quantitatively. PATIENTS AND METHODS : Removal of an impacted lower third molar was done under local anesthesia with 2% lidocaine to 239 healthy patients. We randomly gave experimental group 1.5mg dexamethasone and 200mg naproxen three times a day for postoperative 2days, and also gave control group 200mg naproxen alone three times a day for postoperative 2days. Swelling and pain were measured by visual analogue scale (VAS). Mouth opening limitation was measured by maximum interincisal opening length. We estimated these measurements in the first and second postoperative days. Differences between experimental and control group were investigated considering age, sex, BMI(body mass index), impacted type, surgical site(right or left), and operation time by independent student T-test. RESULTS : In general, swelling, pain, and mouth opening limitations were significantly reduced (p<0.01) by combination dose of dexamethasone and naproxen in postoperative one day. But there was no difference in pain on the second postoperative day. As variables being considered, in the postoperative pain, there was significant difference between experimental group and control group in only male, little bony removal group, left side extraction group. In case of postoperative swelling, there was no significant differences in male, adolescence, long operating time group (over 20 minutes), medium BMI group and right side extraction group. In case of postoperative mouth opening limitation, there was significant difference between only female and long operating time group (over 20 minutes). CONCLUSION : Variables being considered, postoperative swelling was more reduced by the combination dose of naproxen and dexamethasone than that of naproxen alone after removal of impacted 3rd molars. But there was varoius results in pain and mouth opening limitation.

CT Scanner를 이용한 아스팔트 혼합물의 공극특성 평가

신광호,김성겸,이관호,Shin,Kwang-Ho,Kim,Seong-Kyum,Lee,Kwan-Ho 한국방재학회 2012 한국방재학회논문집 Vol.12 No.3

아스팔트 혼합물의 공극은 아스팔트 혼합물의 소성변형과 같은 공용성능에 큰 영향을 준다. 최근 다양한 기능성을 고려한 배수성 아스팔트, 저소음 아스팔트, 보습성 아스팔트, SMA 등 다양한 아스팔트 혼합물이 개발되어 이용되고 있다. 이러한 다양한 기능은 주로 아스팔트 혼합물의 공극특성과 밀접한 상관관계를 가진다. 이에 본 연구에서는 아스팔트 혼합물의 공극특성을 평가하기 위하여 Micro CT Scanner를 이용하였다. 배수성아스팔트 혼합물, SMA 10 mm 혼합물 및 일반밀입도 아스팔트를 이용하여 공극특성을 분석하였다. PA-13 배수성포장용 아스팔트 혼합물과 SMA 10 mm 혼합물의 경우 다짐횟수가 작을수록 투수특성에 영향을 주는 유효공극량, 총공극량 및 공극의 연결율이 크게 나타났다. 다짐횟수 50타 및 75타로 다짐 시편간의 유효공극량, 총공극량 및 공극의 연결율의 차이는 비교적 작게 나타났다. 밀입도 아스팔트 혼합물의 경우 아팔트 시편내부에 개별적인 공극이 존재하지만, 이러한 공극이 연결되어 투수에 영향을 주는 공극은 거의 없는 것으로 분석되었다. CT Scanner는 아스팔트 혼합물의 공극 특성을 수치적으로 검증할 수 있는 실험방법으로 활용할 수 있을 것으로 판단된다. The void of asphalt pavement effects very much on the performance of asphalt pavement, including permanent deformation. In recent, lots of multi-functional hot mix asphalt have been developed. The multi-functional properties depend on the void characteristic of hot mix asphalt. In this research, the Micro CT scanner is adopted to verify the void characteristic of hot mix asphalt. Couple of different mixtures, including permeable asphalt pavement, SMA and dense-graded asphalt mixture, were used for void analysis. In case of PA-13 permeable asphalt pavement and SMA 10mm, the effective void, total void and the ratio of connection between void increase as the level of compaction decreases. There is a little difference of the effective void, total void and the ratio of connection for 50 blows/side and 75 blows/side of compaction. In case of dense-graded asphalt mixture, there is a small amount of void, but most of void is isolated, which means little effect on the permeability of asphalt mixtures. Judging from the limited test results, a Micro CT scanner will be an alternative to analyze the void properties of asphalt mixtures. The correlation of unconfined compressive test and impact resonant test was relatively good.

MIM 공정을 적용한 유사형상 Cu-W 전극 개발

신광호(K. H. Shin),전용준(Y. J. Jeon),권영삼(Y. S. Kwon),한무근(M. K. Han),허영무(Y. M. Heo) 한국소성가공학회 2013 한국소성가공학회 학술대회 논문집 Vol.2013 No.10

실시간 철도안전 관제를 위한 데이터 처리 방안 연구

신광호(Kwang-Ho Shin),정혜란(Hye-Ran Jung),안진(Jin Ahn) 한국철도학회 2016 한국철도학회논문집 Vol.19 No.4

안전관제시스템 프로토콜 표준화와 상호 운용성을 위한 데이터 인터페이스장치 구현방안 연구

신광호(Kwang-Ho Shin),엄태화(Tae-Hwa Um),임담섭(Damsub Lim),안진(Jin Ahn) 한국철도학회 2015 한국철도학회 학술발표대회논문집 Vol.2015 No.10

실시간 철도안전 통합 감시 및 제어 시스템은 철도시설, 철도차량 및 안전 설비에 대한 고장을 감시하고 위험을 예측하며, 사고 발생시 사고 원인을 분석하기 위한 안전 관련 데이터를 수집한다. 수집하는 데이터는 센서(Sensor) 및 엑추에이터(Actuator) 별로 프로토콜과 전송 방식이 다양하다. 안전관제 시스템은 실시간성과 상호 운용성을 위해 DDS기반 안전관제 플랫폼의 프로토콜 표준화를 추구한다. 프로토콜의 표준화는 점진적으로 데이터를 표준화하기 위해서 기존의 감시 시스템들의 인터페이스를 변경하지 않고 표준 프로토콜을 도입하는 1단계, 기존의 감시 시스템과 표준 프로토콜을 지원하는 RTU가 혼재된 2단계, 모든 안전관제 데이터가 표준 프로토콜을 지원하는 3단계로 나누어 접근하고자 한다. 본 논문에서는 앞서 말한 3단계 중 1단계를 위해서 데이터 스니핑 방식을 이용한 데이터 수합과 스니핑 된 데이터를 표준 프로토콜로 변환 시키는 데이터 수집장치의 아키텍처에 대해 제안한다. Integrated real-time railroad safety monitoring and control system(in short, safety monitoring and control system) monitors the failure of railroad facilities, trains and safety equipments, predicts the risks, and collects safety data for analyze the reason of the accident after it occurred. The protocol of safety data it collects from the sensors and actuators is very various. So to support real-time communications and to assure interoperability, standardized protocol is necessary such as DDS(Data Distribution Service). To change the network architecture of the safety monitoring and control system progressively this paper suggests 3 steps. The 1st step is apply the standardized protocol aside of legacy network using tap device, which can gather the safety data without changing the legacy network. The 2nd step is mix the legacy protocol and standardized protocol together when the new type of RTU(Remote Terminal Unit) which can support standardized protocol by itself. And the 3rd step is only use standardized protocol when every RTU can support the new protocol. This paper describes the 1st step network architecture and the protocol converting network node(or interfacing device) which can change the legacy protocol to the new one.

자동화 기술 관련 직업 훈련의 검정 방안에 관한 연구

신광호(K . H . Shin),김문기(M . K . Kim),김준수(J . S . Kim),류길하(G . H . Ryu),조현찬(H . C . Cho),최성주(S . J . Choi),윤한경(H . K . Yun) 대한공업교육학회 1995 대한공업교육학회지 Vol.20 No.1

In production manufacturing area, many companies recently have a lot of difficulties due to the trade protectionism from leading countries externally and the labor dispute including wages of workers internally. Manufacturers put efforts to change their production lines by using automation techniques. The vocational education system is still wandering and is not following demands of skilled workers related automation in the industrial society. The production system of manufacturing has a wide range of automatization that requires background knowledge about computer, control, mechanics, and electronics. But the curriculum of vocation training related automation is far from the demand of skilled worker in automated production system. In the previous research, a curriculum of vocational training of automation techniques for good quality and high productivity was suggested. In this paper, the technical qualifying examination related automation areas is proposed which satisfies to demands of these days industry, and a real practical exam is given as a model which is able to estimate the ability of trainee and all of background knowledge related automation areas.

바이어스 응력에 의한 고자왜 아몰퍼스 박막의 자기이방성 제어

신광호(Kwang-Ho Shin),김영학(Young-Hak Kim),박경일(Kyung-Il Park),사공건(Geon Sa-Gong) 한국자기학회 2003 韓國磁氣學會誌 Vol.13 No.5

To materialize the magnetoelastic devices, such as a highly functional sensor and a signal processing device, using the Fe base amorphous film which has both excellent soft magnetic and magnetostrictive properties, in this study, a new method to control the magnetic anisotropy of a highly magnetostrictive film using bias stress has been proposed and tested. The film pattern, which was stressed by its substrate bending, was subjected to annealing for relieving its stress. Successively, the compressive stress occurred by flattening the substrate was formed in the pattern. With the introduction of the residual compressive stress, the magnetization of the film pattern was aligned in the transverse direction through magnetoelasic coupling. The magnetic domain structure and magnetization curve of the film pattern of which magnetic anisotropy was controlled by the proposed method were presented to verify the availability of the method.