태연혈(太淵穴)의 유침 시간에 따른 체온 변화 -적외선체열촬영(赤外線體熱撮影)을 중심으로-

이봉효 ( Bong Hyo Lee ),이경민 ( Kyung Min Lee ),박지하 ( Ji Ha Park ),김민서 ( Min Seo Kim ),김산들 ( San Deul Kim ),박병규 ( Byeong Gyu Park ),양현동 ( Hyun Dong Yang ),예성호 ( Sung Ho Yea ),이호정 ( Ho Jung Lee ),최재원 ( Jae 경락경혈학회 2012 Korean Journal of Acupuncture Vol.29 No.2

Objectives: This study was performed to find the desirable remaining time of needle in the acupuncture treatment. Methods: The 21 volunteers were given acupuncture at LU9 vertically and needles were remained for 2 min, 10 min, 15 min, 30 min, respectively. The thermographic change induced by acupuncture was measured with Digital Infrared Thermographic Image at the following acupoints: LU11, LU10, LU9, LU8, LU5, LU1, and PC7. The statistical significance of thermographi change was evaluated using paired t-test and post hoc Wilcoxon test. Results: The most significant changes after acupuncture were produced when needles were remained for 10 min or 15 min. LU11, LU5, LU1, and PC7 were the point at which all of the remaining time produced significant change commonly. At LU11, the biggest change was produced when needle was remained for 15 min, while at LU5, LU1, and PC7, the biggest change was produced when needle was remained for 30 min, and the smallest change was produced when needle was remained for 10 min at all of acupoints of LU11, LU5, LU1, and PC7. The unbalance between left side and right was decreased the most largely in 15 min group. Conclusions: The results of this study suggest that the desirable remaining time of acupuncture needle might be 15 min.

합금강관의 Energy Resistance Welding 용접조건에 따른 미세조직 거동 및 기계적 특성 연구

이경민,이동언,김성웅,윤병현,강희재,강남현,조경목,Lee, Kyung-Min,Lee, Dong-Eon,Kim, Sung-Woong,Yoon, Byung-Hyun,Kang, Hee-Jae,Kang, Nam-Hyun,Cho, Kyung-Mox 한국재료학회 2011 한국재료학회지 Vol.21 No.1

Energy resistance welding (ERW) is a pipe-producing process that has high productivity and low manufacturing cost. However, the high heat input of ERW degrades the mechanical property of the pipe. This study investigates the effect of heat input and alloying elements on microstructure and mechanical properties of ERW pipes. As the heat input increased, the ferrite amount increased. The ferrite amount in the weld centerline was larger than t at in the weld boundary. Medium carbon steels (S45C and K55) having 0.3~0.4wt.% carbon yielded a significant difference of ferrite amount in the weld centerline and weld boundary. High alloyed steels (DP780 and K55) having 1.5~1.6wt.% Mn showed a ferrite rich zone in the weld centerline. These phenomena are probably due to decarburization and demanganisation in the weld centerline. As the ferrite fraction increased, the hardness decreased a little for the S45C steels. In addition, DP780 steels and K55 steels showed that the hardness drops when those steels have a ferrite rich zone. But we demonstrated the good tensile property of the DP780 steels and K55 steels in which Mn is included.

자동차용 박강판 겹치기 이음부의 CO₂ 아크 용접에서 다중회귀분석기법을 이용한 용입깊이 예측에 대한 연구

이경민,심현우,권재형,윤북동,정민기,박문수,이보영,Lee, Kyung-Min,Sim, Hyun-Woo,Kwon, Jae-Hyung,Yoon, Buk-Dong,Jeong, Min-Ki,Park, Moon-Soo,Lee, Bo-Young 대한용접접합학회 2012 대한용접·접합학회지 Vol.30 No.2

Welding is an essential process in the automotive industry. Most welding processes that are used for auto body are spot welding and $CO_2$ welding are used in a small part. In production field, $CO_2$ welding process is decreased and spot welding process is increased due to welding quality is poor and defects are occurred in $CO_2$ welding process frequently. But $CO_2$ welding process should be used at robot interference parts and closed parts where spot welding couldn't. Because of the 0.65mm ~ 2.0mm thickness steel sheet were used in the automotive industry, poor quality of welding area such as burn through and under fill were happened frequently in $CO_2$ process. In this paper, we will study about the penetration depth which gives a huge impact on burn through changing a degree of base metal, welding position and torch angle. Voltage, current and welding speed were fixed but degree of base metal, welding position and torch angle were changed. And Cold- Rolled(CR) steel sheet was used. Penetration depth was analysed by multiple regression analysis to derive approximate calculations. And reliability of approximate calculations were confirmed through additional experiments. As the results of this research, we confirmed the effect of torch and plate angle to bead shape. And we present a possibility that can simulate more accurate to weld geometry, as deduced the verification equations that has tolerance of less than 21.69%.

봉약침료법(蜂藥鍼療法)을 가미(加味)한 건선(乾癬) 치험(治驗) 1례(例)

이경민,윤현민,고우신,장경전,하지영,서정철,한상원,Lee, Kyung-min,Youn, Hyoun-min,Ko, Woo-shin,Jang, Kyung-jeon,Ha, Ji-young,Seo, Jung-chul,Han, Sang-won 대한침구의학회 2003 대한침구의학회지 Vol.20 No.1

Objective : Psoriasis is a common skin disease and the difficulty of its medical management is well known. This study was designed to investigate the effect of bee venom aqua-acupuncture on psoriasis. Methods : Bee venom aqua-acupuncture was performed two times a week. The following points were selected: LI-11(曲池), LI-15, K-9(築賓) on both sides of body. For herbal medicine, YanHyulJiHwangTang-gami was given. We checked involvement in plaque, erythematous popules and invasiveness according to psoriasis area severity index(PASI). Results :After 9 weeks of treatment, the patient showed that itching symptoms was disappeared and score of PASI changed from 26.2 to 0. Conclusions : These results suggest that bee venom aqua-acupuncture and herbal medicine has good effect on psoriasis. But further studies are required to concretely prove the effectiveness of bee venom aqua-acupuncture for treating psoriasis.

휴대형 자동, 수동형 및 탁상형 자동 각막곡률검사기로 측정한 각막곡률의 신뢰성

이경민,박신혜,신선영,Kyung-Min Lee,Shin-Hae Park,Sun-Young Shin 대한안과학회 2010 대한안과학회지 Vol.51 No.3

Purpose: To compare the keratometry measurements by the handheld Nikon Retinomax K-plus2, the on-table Canon RK-5 autokeratometer, and the manual Topcon OM-4 keratometer and to evaluate the degree of agreement among the three instruments. Methods: Adults (n=30) and children (n=40) presenting toa tertiary eye hospital clinic were examined by an optometrist. Topcon OM-4 keratometer, Nikon Retinomax and the on-table Canon RK-5 autokeratometer analyses were performed in order. The horizontal and vertical keratometry data were measured. The vector components of astigmatism, mean bias and agreement among the three types of measurements were evaluated. Results: There were no significant differences among the three keratometers in horizontal or vertical keratometry or in central corneal astigmatism in both the adult and child groups (p-value>0.05). The keratometers which were estimated with Retinomax K-plus2 were highly correlated with those by on-table RK-5 autokeratometer (min. 0.89, max. 0.97) and Topcon OM-4 keratometer (min. 0.67, max. 0.94) in the adult group, while in the child group, the three instruments showed slightly decreased correlation (min. 0.45, max. 0.97 on RK-5, min. 0.36, max. 0.92 on OM-4), especially in the left eyes. Conclusions: The handheld Retinomax K-plus2 provided comparable data to that of the conventional on-table Topcon and manual keratometers. This instrument will beuseful in the clinic to measure keratometry in children or immobilized patients who have difficulty sitting during the examination.

Oligonucleotide chip을 이용한 홍화자약침액(紅花子藥鍼液)이 위암세포주(胃癌細胞柱)의 유전자(遺傳子) 발현(發顯)에 미치는 영향(影響)

이경민,임성철,정태영,서정철,한상원,Lee, Kyung-Min,Lim, Seong-Chul,Jung, Tae-Young,Seo, Jung-Chul,Han, Sang-Won 대한약침학회 2005 Journal of pharmacopuncture Vol.8 No.1

Objectives : It has long been known about the osteogenic effect of CTF-HAS on bone tissues. However, it has not been determined the effect of CTF-HAS on cancer cells. The purpose of this study is to screen the CTF-HAS mediated differentially expressed genes in cancer cells such as SNU484 gastric cancer cell lines. Oligonucleotide microarray approach were employed to screen the differential expression genes. Methods : CTF-HAS was prepared by boiling and stored at $-70^{\circ}C$ until use. Cells were treated with various concentrations of CTF-HAS(0.1, 0.5, 1.5, 10, 20mg/ml) for 24 h. Cytotoxicity was tested by MTT assay. To screen the differentially expressed genes in cancer cells, cells were treated with 1.5mg/ml of CTF-HAS. For oligonucleotide microarry assay, total RNA was used for gene expression analysis using oligonucleotide genechip (Human genome U133 Plus 2.0., Affimatrix Co.). Results : It has no cytotoxic effects on HepG2 cells in all concentration (0.1, 0.5, 1.5, 10,20mg/ml). More than twofold up-regulated genes were 5 genes. The number of more than twofold down-regulated genes was 10. Discussion : This study showed the screening of CTF-HAS mediated differentially regulated genes using combined approaches of oligonucleotide microarray. The screened genes will be used for the better understanding in therapeutic effect of CTF-HAS on cancer field.

유산균이 Aspergillus parasiticus의 성장과 Aflatoxin $B_1$ 생성에 미치는 영향

이경민,김종규,Lee Kyung-Min,Kim Jong-Gyu 한국환경보건학회 2005 한국환경보건학회지 Vol.31 No.2

This study was performed to investigate the competitive effect of Leuconostoc mesenteroides and Lactobacillus plantarum on the growth and aflatoxin $B_1$ production of Aspergillus parasiticus. Leu. mesenteroides and Lac. plantarum were grown with A. parasiticus in a modified APT broth at $28^{\circ}C$ for 9 days. It was observed that the growth of A. parasiticus got lower when the two bacteria were inoculated simultaneously than when the mold grew alone. The pH of mixed culture of Leu. mesenteroides and Lac. plantarum showed significantly lower value than the pH of the pure culture of A. parasiticus (p<0.05). The acidity of the mixed culture group significantly increased compared with the control group (A. parasiticus alone group) (p<0.05). The aflatoxin $B_1$ production was significantly decreased in the mixed culture group than in the A. parasiticus alone group (p<0.05). Leu. mesenteroides showed the more efficient effect than Lac. plantarum. These results indicate that the two lactic acid bacteria have inhibitory effect on the growth and aflatoxin $B_1$ production of Aspergillus parasiticus.

엑시머레이저 굴절교정수술을 이용한 백내장 수술 후 잔여 난시에 의한 부등시의 교정

이경민,김은철,김만수,Kyung Min Lee,M,D,Eun Chul Kim,M,D,Man Soo Kim,M,D,Ph,D 대한안과학회 2008 대한안과학회지 Vol.49 No.10

Purpose: To evaluate the clinical effect of photorefractive keratectomy (PRK) and laser assisted in situ keratomileusis (LASIK) on eyes with anisometropia due to residual astigmatism after cataract surgery. Methods: We retrospectively reviewed the medical records of 11 eyes of 11 patients who had undergone cataract surgery from March 2002 to November 2005. PRK (2 eyes) and LASIK (9 eyes) was performed on 11 eyes with refractive myopic or mixed astigmatism over 1.5D after cataract surgery. Result: Before laser surgery, the mean astigmatism was 3.23±1.02D and the mean spherical equivalent (SE) was -2.27±1.43D. Six months after laser surgery, the mean SE was 0.66±0.58D and the mean astigmatism was 0.73±0.39D. The changes in mean manifest SE and astigmatism were statistically significant between paired preoperative and postoperative values (p<0.05). At 6 months after surgery, the mean uncorrected visual acuity and best corrected visual acuity significantly improved to 0.65±0.17 and 0.84±0.11, respectively. Three eyes (27.3%) developed mild haze and were treated without sequelae. There were no other complications. Conclusions: Excimer laser surgery appears to be a clinically useful procedure to correct residual astigmatism after cataract surgery. J Korean Ophthalmol Soc 2008;49(10):1589-1596

국립대학도서관 상호대차의 활성화 요인에 관한 연구

이경민,Lee Kyung-Min 한국문헌정보학회 1997 한국문헌정보학회지 Vol.31 No.1

본 연구는 대학도서관 상호대차의 활성화에 영향을 미치는 요인을 맞힐 목적으로 수행되었다. 자료는 (국립대학도서관보)와 질문지를 통하여 수집하였고. 상호대차 활성화 요인의 분석 방법으로는 분석 자료의 형태에 따라 t-test와 회귀분석방법을 사용하여, 21개 국립대학도서관의 구성요소와 상호대차건수와의 관계를 밝혔다. 연구의 결과 상호대차 담당자의 주제 배경이 문헌정보학인 도서관군이 그렇지 않은 도서관군보다 상호대차가 활발하고, 자료는 접수건수에 많은 영향을 미치지만, 의뢰건수에는 접수건수에 비해 비교적 적게 영향을 미치고 있으며, 상호대차시 팩시밀리나 PC를 사용하는 도서관군이 그렇지 않은 도서관군보다 상호대차가 활발하다는 점등이 밝혀졌다. The purpose of this study is to Investigate the factors haying an Influence on activating the Interlibrary loan between national university libraries. Data were collected by <Bulletin of National College & University Libraries> and questionnaires. To analyze the factors activating the Interlibrary loan, 1-test and regression analysis method Is adopted depending on the type of data collected. The findings of the study shows that the interlibrary loan can be more actively performed in the group of libraries to focus the subject background on library and Information science than the other group the number of lending cases is highly affected by collection size. the number of periodical titles, annually increased number of collections and periodical titles. Otherwise the number of borrowing cases is much less affected than the number of lending cases by the above factors : the interlibrary loan can be more actively conducted in the group of libraries using facsimile or PC than the other group.

위화(胃火) 1호(號)로 호전(好轉)된 만성위염(慢性胃炎) 환자(患者) 치험(治驗) 2례(例)

이경민,이세연,임성철,서정철,한상원,Lee, Kyung-min,Lee, Se-yun,Im, Sung-chul,Seo, Jung-chul,Han, Sang-won 대한침구의학회 2003 대한침구의학회지 Vol.20 No.6

Objective: This study was designed to investigate the effect of Wihwa herbal-acupuncture on chronic gastritis. Methods: Wihwa herbal-acupuncture was administered two times a week. The following points were selected: CV12(中脘), CV13(上脘), S36(足三里), Liv3(太衝). We checked pain rating score(P.R.S.), visual analogue scale (V.A.S.) and Gastroscopy. Results: After 6 weeks of treatment, the patient showed that clinical symtoms was disappeared, Lee's P.R.S. changed from 77 to 8 and Park's P.R.S. from 55 to 0 and gastric erosion disappeared on gastroscopy. Conclusions: These results suggest that and Wihwa herbal-acupuncture has good effect on chronic gastritis. But further studies are required to concretely prove the effectiveness of Wihwa herbal-acupuncture for treating chronic gastritis.