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.

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.

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.

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.

아몰퍼스와이어를 이용하여 제작한 직교 플럭스게이트 센서의 출력에 미치는 구동 주파수와 여자 전류의 영향

신광호(Kwang-Ho Shin) 한국자기학회 2009 韓國磁氣學會誌 Vol.19 No.1

In this study, we have investigated that the excitation current and operation frequency dependences of the output properties of the orthogonal fluxgate sensor which was fabricated with a Co base amorphous wire and a pick-up coil. The output signal increased linearly with increase of the excitation current below 0.3 A, and decreased with increase of the excitation current over 0.6 A. It was also found that the output increased sensitively with increase of operation frequency below 1.3MHz. The output was 3.8 V at the frequency of 1.3MHz while 1.32 V at 1MHz.

자동화 기술 관련 직업훈련의 교과과정에 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 1994 대한공업교육학회지 Vol.19 No.2

With a rapid development of new technologies such as computer and mechatronics, production techniques in manufacturing field are changing so fast and desires for automatization of production systems are increased in modern industry. However the realization of industrial structure in our countries is a little different from leading countries. In practical view, the production systems of our country have a wide range of automatization in manufactures, and most of the production systems are far from the fully automatic system and the computerized system in leading countries. Such industrial structure with wide range of automatizationis required various kinds of skilled workers who have the background knowledge about computer, control, mechanics and electronics. The purpose of this project is to develop a part of education program about vocational training of automation technology for good quality and high productivity in developing country, and suggests a prototype of curriculum for the automatized production system to fit in the request of modern manufacturing industry.

에어로졸성막법으로 성막한 Bi:YIG막의 광학적/자기적특성에 미치는 에어로졸 입사각도의 영향

신광호(Kwang-Ho Shin) 한국자기학회 2008 韓國磁氣學會誌 Vol.18 No.1

Bismuth-substituted yttrium iron garnet (Bi:YIG, Bi<SUB>0.5</SUB>Y<SUB>2.5</SUB>Fe?O₁₂) films were deposited with the aerosol deposition method and their magnetic and optical properties were investigated as a function of the aerosol incident angle. The optical transmittance of Bi:YIG increased about 80 % with increasing the aerosol incident angle from 0 degree to 30 degree, due to decrease of the defects which were formed from agglutinations of the Bi:YIG particles inside and/or surface of the film. The coercive force also decreased largely with increasing the aerosol incident angle due to the reduction of the collision energy between the particles and the substrate and the decrease of the defects.

에어로졸성막법에 의해 제작된 Bi:YIG막에 미치는 에어로졸유량의 영향

신광호(Kwang-Ho Shin) 한국자기학회 2008 韓國磁氣學會誌 Vol.18 No.1

Bismuth-substituted yttrium iron garnet (Bi:YIG) films, which show excellent magnetic and magneto-optical properties as well as low optical losses by optimizing their deposition and post-annealing condition, have been attracting great attention in optical device research area. In this study, the Bi:YIG thick films were deposited with the aerosol deposition method for the final purpose of applying them to optical isolators. Since the aerosol deposition is based on the impact adhesion of sub-micrometer particles accelerated by a carrier gas to a substrate, the flow rate of carrier gas, which is in proportion to mechanically collision energy, should be treated as an important parameter. The Bi:YIG (Bi<SUB>0.5</SUB>Y<SUB>2.5</SUB>Fe?O₁₂) particles with 100~500 ㎚ in average diameter were carried and accelerated by nitrogen gas with the flow rate of 0.5 l/min~10 l/min. The coercive force decreased from 51 Oe to 37 Oe exponentially with increasing gas flow rate. This is presumably due to the fact that the optimal collision energy results in reduction of impurity and pore, which makes the film to be soft magnetically. The saturation magnetization decreased due to crystallographical distortion of the film with increasing gas flow rate.

판상 미세 리브 구조의 사출성형 특성

신광호(K. H. Shin),윤길상(G. S. Yoon),장성호(S. H. Chang),정우철(W. C. Jung),허영무(Y.M. Heo) 한국소성가공학회 2005 한국소성가공학회 학술대회 논문집 Vol.2005 No.10