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$(Ba_{0.8-x}Sr_{0.2})Y_xTiO_3$의 상온비저항을 모델링하기 위한 반응표면분석법의 적용
문형철,노태용,김승원,이철,Moon, Hyung Chul,Noh, Tae Yong,Kim, Seung Won,Lee, Chul 대한화학회 1998 대한화학회지 Vol.42 No.6
바륨, 스트론튬, 이트륨 및 티탄의 질산염과 옥살산을 이용한 습식화학합성법으로 금속-옥살레이트의 침전물을 얻고, 이를 하소하여$(Ba_{0.8-x}Sr_{0.2})Y_xTiO_3(BSYT)$ 분말을 제조하였다. Y의 혼입량, 소결 온도 및 냉각 속도를 실험 인자로 설정하여 BSYT의 상온비저항을 위한 모델식을 반응표면분석법으로 구하였다. 그 결과 Y의 혼입량 변화가 상온비저항에 가장 크게 영향을 미치며, Y의 함량이 약 0.24 mol% 일 때 상온비저항은 최소값을 나타내었다. 실제 실험으로부터 구한 상온비저항 값과 모델식으로부터 계산한 상온비저항 값을 비교한 결과 잘 일치함을 확인하였다. $(Ba_{0.8-x}Sr_{0.2})Y_xTiO_3\;(BSYT)$ powders were prepared by the calcination of metal-oxalate precipitates, which were obtained by wet chemical method using Ba, Sr, Y and Ti-nitrates and oxalic acid. Yttrium content, sintering temperature and cooling rate were taken as experimental factors. Response surface method was applied to modelling of the room temperature resistivity of BSYT. The results indicated that the Yttrium content had larger effect on the room temperature resistivity and minimum room temperature resistivity was at Yttrium content of 0.24 mol%. The validity of a modelling equation was confirmed by comparing the measured room temperature resistivity with the calculated one.
아메리카잎굴파리 내부기생봉, Neochrysocharis formosa(Hymenoptera : Eulophidae)의 산란과 기주체액섭취 특성
문형철,전용균,최선우,정성수,류정,최정식,최영근,황창연,Moon, Hyung-Chul,Jeon, Yong-Kyun,Choi, Sun-Woo,Jung, Sung-Soo,Ryu, Jung,Choi, Jung-Sik,Choi, Young-Geun,Hwang, Chang-Yeon 한국응용곤충학회 2004 한국응용곤충학회지 Vol.43 No.1
아메리카잎굴파리의 내부기생봉인 Neochrysocharis formosa의 산란과 기주체액섭취 선호성을 조사하였다. N. formosa는 기주유충의 몸 뒤쪽에 대부분 산란하였다. 온도 조건에 따른 일산란수와 일기주체액섭취수를 조사한 결과 온도가 높을수록 증가하는 경향이었으며 15, 20, 25, 3$0^{\circ}C$에서의 산란수와 체액섭취수의 비율은 각각 0.5, 0.9, 1.0, 1.0이었다. $25^{\circ}C$ 항온조건하에서 N. formosa의 총산란수와 기주체액섭취수는 각각 176개 188.7개이었으며 산란수와 기주체액섭취수 비율은 0.9이었고 암컷 수명은 11.8일이었다. 산란과 기주체액섭취는 주로 아메리카잎굴파리 3령유층을 선호하였다. These studies were carried out to investigate the oviposition and host feeding characteristics of Neochrysocharis formosa Westwood, an endoparasitoid of Liriomyza trifolii. N. formosa female oviposited inside the abdomen at the rear end of the host larva. Number of eggs and host feeding per day of N. formosa tended to increase as temperatures go up. The ratio of oviposition and host feeding of N. formosa were 0.5, 0.9, 1.0 and 1.0 at 15, 20, 25, and 30$^{\circ}C$, respectively. In 25$^{\circ}C$, number of eggs and host feeding were 176.0 and 188.7, respectively, and aduly female longevity was 11.8 days. N. formosa female preferred to the 3rd rather than 1st and 2nd larva for oviposition and host feeding.
MKR: 센싱 정보에 기반한 비트 스트림 암호화 방식의 센서 네트워크 보안 프로토콜
문형철 ( Hyung-chul Moon ),박선호 ( Sun-ho Park ),한영주 ( Young-ju Han ),정태명 ( Tai-myoung Chung ) 한국정보처리학회 2006 한국정보처리학회 학술대회논문집 Vol.13 No.1
최근 몇 년 동안 센서 네트워크에 보안을 제공하기 위한 여러 연구가 진행되었고 그 결과물로 몇 가지의 보안 프로토콜이 제시되었다. 그러나 지금까지 제시된 보안 프로토콜들은 많은 시스템 자원과 부가적인 통신 횟수들을 필요로 하는 기존의 암호화 방식을 그대로 사용하고 있어 실제 센서 네트워크에 적용하여 사용하기에는 힘들다. 이의 해결 방안으로 본 논문에서는 새로운 암호화 방식을 사용하는 센싱 정보에 기반한 보안 프로토콜 모델인 MKR 프로토콜을 제시한다.
알레르기 환자(患者)의 홍채(紅彩) 체질(體質) 분석(分析)
황우준,문형철,장병선,양귀비,박은정,이해자,권미원,진경선,Hwang Woo-Jun,Moon Hyung-Chul,Jang Byoung-Sun,Yang Gui-Bi,Park Eun-Jung,Lee Hai-Ja,Kwon Mi-Won,Jin Gyoung-Sun 대한한방소아과학회 2000 대한한방소아과학회지 Vol.14 No.2
Background : Constitution is related to allergic patients. Objective : The aim of this study was to analyzed allergy Material and Method : We investigated 50 patients suffering from allergy and analyzed the relationship iris constitution and allergy. Conclusion : We analyzed allergy patients, among of them, Abdominal connective tissue weakness constitution is 33(66%), neurogenic type and hydrogenic constitution is 10(20%), bronchopulmonary connective tissue weakness constitution is 5(10%). We know that Allergic patients are abdominal connective tissue weakness constitution, neurogenic type, hydrogenic constitution and bronchopulmonary connective tissue weakness constitution.
이중맹검을 위한 Sham Acupuncture에 대한 임상연구
임정아,서정철,이은용,이향숙,문형철,최선미,황우준,조남근,김성철,Lim, Jeong-A,Seo, Jung-Chul,Lee, Eun-Yong,Lee, Hyang-Sook,Moon, Hyung-Cheol,Choi, Sun-Mi,Hwang, Woo-Joon,Cho, Nam-Geun,Kim, Sung-Chul 대한침구의학회 2006 대한침구의학회지 Vol.23 No.5
Background and Purpose : Though there were many clinical studies of acupuncture effects they didn't have appropriate control group. So we didn't say it was true acupuncture effect, though subjects in clinical study improved. To investigate the possibility of sham acupuncture application, we examined how well subjects distinguished real acupuncture from sham acupuncture. Methods : We investigate the possibility of sham acupuncture application as the following 3 kinds of methods. 1. The public (n=60) and Oriental Medicine Doctors (n=20) looked at the appearance of acupuncture and then were treated with randomly allocated acupuncture and judged it as real or sham. 2. The public (n=60) and Oriental Medicine doctors (n=20) were treated with randomly allocated acupuncture, then they looked at the appearance of acupuncture and judged it as real or sham. 3. The public (n=60) were treated with randomly allocated acupuncture (right-real-left-sham), (right-sham-left-real), (left-real-right-sham), (left-sham-right-real), then they judged it as real or sham. Results : 1. When the public (n=60) looked at the acupuncture appearance, the correct judgement ratio was 63.3%. After they were treated with acupuncture, the correct judgement ratio was 50.0%. 2. When Oriental Medicine doctors (n=20) looked at the acupuncture appearance, the correct judgement ratio was 25.0%. After they were treated with acupuncture, the correct judgement ratio was 45.0%. 3. When the public (n=60) were treated with acupuncture, the correct judgement ratio was 50.0%. After they looked at the acupuncture appearance, the correct judgement ratio was 63.3%. 4. When Oriental Medicine doctors (n=20) were treated with acupuncture, the correct judgement ratio was 65.5%. After they looked at the acupuncture appearance, the correct judgement ratio was 65.0%. 5. After the public (n=60) were treated with randomly allocated sham or real acupuncture as (right-real-left-sham), (right-sham-left-real), (left-real-right-sham), or (left-sham-right-real). the correct judgement ratio was 66.7% in looking at the acupuncture appearance group, and in not looking at 60.0%. Conclusion : These results indicated that Kim Sham Acupuncture could apply to the double blind clinical study of acupuncture effect. And more continuous studies are needed on Sham Acupuncture apparatus.
Sweet Bee Venom과 봉약침의 퇴행성 슬관절염에 대한 통증감소효과와 Allergy 반응 비교연구
나원민,이성용,장은하,문형철,김성민,윤창호,전봉환,김성철,Na, Won-Min,Lee, Sung-Young,Jang, Eun-Ha,Moon, Hyung-Cheol,Kim, Seong-Min,Yoon, Chang-Ho,Jun, Bong-Hwan,Kim, Sung-Chul 대한약침학회 2007 Journal of pharmacopuncture Vol.10 No.2
Objectives : To verify pain relief effects and allergy inhibitory action for the osteoarthritis of the knee joint in Sweet Bee Venom in which allergy causing enzyme is removed. Methods : We randomly allocated 36 participants to treatment group Sweet Bee Venom and Bee Venom. Outcomes on pain reduction were measured by 100mm VAS(Visual Analog Scale). And we recorded into details allergic responses during Pharmacopuncture treatment. Results : Whole body condition and pain rate through VAS measurement were improved significantly in 2 weeks. We could get difference in pain score of two Pharmacopuncture groups significantly in 2 weeks. BV group showed superior reduction in pain compared to the Sweet BV group. But we could not get difference in whole score of two pharmacopuncture groups significantly. On the other hand other allergic responses such as edema, itchiness, pain were significantly lower in the Sweet BV group.
오공약침(蜈蚣藥鍼)을 이용한 수근관 증후군(Carpal tunnel syndrome) 치료의 임상적 연구
임정아,김성남,이성용,문형철,김성철,Lim, Jeong-A,Kim, Sung-Nam,Lee, Sung-Young,Moon, Hyung-Cheol,Kim, Sung-Chul 대한약침학회 2005 Journal of pharmacopuncture Vol.8 No.1
Objectives : This study is performed for the purpose of examining into the efficacy of the scolopendrid herbal acupucture which has been used among the Korean people for the Carpal tunnel syndrome. Methods : 40 carpal tunnel syndrome patients who visited Won-kwang University Hospital during the period from January 1998 to December 2004 were analysed for clinical manifestations. After we divided patients into two classes at random, we treated them with scolopendrid herbal acupucture or not. Treatment efficiency was monitored through VAS(Visual Analog Scale) and clinical symptom. Conclusion : We brought to the conclusion that the scolopendrid herbal acupucture has possibility to be efficient to cure the carpal tunnel syndrome patients. So we suggest the possibility to use this new remedy for the carpal tunnel syndrome.
침(鍼)과 봉약침(蜂藥針) 복합치료(複合治療)의 퇴행성(退行性) 슬관절염(膝關節炎)에 대한 임상적(臨床的) 연구(硏究)
임정아,김성남,이성용,문형철,신민섭,김희준,구성태,최선미,김성철,Lim, Jeong-A,Kim, Sung-Nam,Lee, Sung-Young,Moon, Hyung-Cheol,Shin, Min-Seop,Kim, Hyi-Jun,Koo, Sung-Tae,Choi, Sun-Mi,Kim, Sung-Chul 대한약침학회 2005 Journal of pharmacopuncture Vol.8 No.2
Objective : This study is performed for the purpose of examining into the efficacy of the Bee Venom Acupuncture Treatment for Osteoarthritis of Knee Joint. Methods : We investigated 25 cases of patients with Osteoarthritis of Knee Joint from 1st June 2005 to 13th July 2005. The 25 patients were taken Bee Venom Acupuncture over three times irregularly. Treatment efficiency was monitored through VAS (Visual Analog Scale) and improvement degree of the grade of clinical symptoms. Conclusions : We brought to the conclusion that the Bee Venom Acupuncture has possibility to be efficient to cure the Osteoarthritis of Knee Joint patients. So we suggest the possibility to use this new remedy for the Osteoarthritis of Knee Joint.