고속 머시닝센터의 진동특성 및 가공성 평가

강익수,강명창,김정석,김기태 한국공작기계학회 2004 한국공작기계학회 춘계학술대회논문집 Vol.2004 No.-

The high speed machining center(HMC) has been widely applied to manufacture a die and trial product in many machine industry. Because the evaluation for HMC is not sufficiently performed and the efficient cutting conditions can't be selected, a great loss has been caused in the cost aspect. In this study, the need of preliminary running time and unstable spindle speed is presented by the analysis of acceleration in idling. The Machinability for the TiAIN coated flat end mill and STD11(H_(R)C60) is evaluated from the trends of tool wear and cutting force according to cutting conditions. The resonance spindle speed is identified through the tool wear and natural frequency test.

학습자의 진로를 고려한 IB Diploma 이수모형에 관한 연구

강익수,박하식,홍후조 한국교육과정학회 2007 교육과정연구 Vol.25 No.3

고속 머시닝센터의 성능평가 기술에 관한 연구

강익수,강명창,김정석,김기태 한국공작기계학회 2004 한국공작기계학회 추계학술대회논문집 Vol.2004 No.-

The high speed machining center(HMC) has been widely applied to manufacture a die and machine elements product in industrial field. Because the evaluation for HMC is not sufficiently performed, ineffective machining is occasionally conducted in machining industry. In this study, the dynamic characteristics of newly developed machining center is evaluated under running condition and the machinability is investigated experimentally. Also, the in-process measuring instrument which can measure the tool wear on the machine were developed by using the CCD and exclusive jig and calibration instrument for tool wear measurement.

복강경 충수 절제술과 개복 충수 절제술의 비교 연구

권수인,강용익 世宗醫學硏究所 1993 世宗醫學 Vol.10 No.2

금강모치 Moroco Keumgang Uchida(Pises, Cyprinidae)의 골격에 관한 硏究

金益秀,姜彦鍾 全北大學校 1986 論文集 Vol.28 No.-

韓國産 황어 亞科에 屬하는 금강모치 Moroco keumgang의 分類學的 位置를 구명하기 위하여 M. keumgang과 그 類緣種의 骨格學的 硏究를 수행하였고 魚類의 分類에 重要視되어 왔던 頭部 側線 感覺管도 觀祭하였다. 본 조사에서 Moroco keumgang의 頭骨, 脊柱, 尾部骨格 및 지느러미 骨格을 자세히 조사하였던 바 M.keumgand은 비교적 긴 interorbital septum을 가지며, 側篩骨과 翼楔骨에 突起가 없는 점, preopercular canal이 dentary canal과 연결되는 점 및 infraorbital canal과 postocular commissure canal의 開孔의 數가 다소 적은 점 등에 있어서 屬內의 다른 種들과 크게 달라 注目되었다. 한편 Moroco屬은 anterior myodome을 갖고, interorbital septum의 하단이 확장되어 楔骨의 背面을 덮어 septum이 완성되는 점 副楔骨이 거의 수평을 이루는 점 등은 Phoxinus 屬과 共有하는 形質로 나타났고, 이러한 3가지의 形質은 잉어科 中에서도 Moroco屬과 Phoxinus 屬만이 갖는 形質이므로 Moroco 屬은 황어亞科 內에서 Phoxinus 屬과 깊은 類緣關係를 갖는 것으로 思料된다. The osteological features of Moroco keumgang were examined and compared with its related species, and the lateral-line sensory systems on the head that has been using important characters in fish classification were also investigated. In the present study, the detailed descriptions of cranium, vertebral column, caudal complex, and fin supports of Moroco keumgang are presented. M. keumgang differs from other species of the genus Moroco based on the longer interorbital septum, the absence of the process at lateral ethomid and pterosphenoid, the presence of connection between the dentary canal, and fewer number of pores of infraorbital canal and postorbital commissure canal. And the genus Moroco shares with the genus Phoxinus some characteristics as follows; 1) the presence of anterior myodome, 2) the form of interorbital septum which the lower part of septum is extended and contact over the parasphenoid roundly, and 3) the relatively straightened parasphenoid. As given three characteristics is observed in only Moroco and Phoxinus in family Cyprinidae, it is remarked that the genus Moroco has close relationships with Phoxinus.

주요우울증에 대한 Milnacipran의 효과 및 안정성 : Fluoxetine과의 비교

이민수,함병주,기백석,김정범,연병길,오강섭,오병훈,이철,정한용,지익성,최병무,백인호 大韓神經精神醫學會 2004 신경정신의학 Vol.43 No.4

Objectives : This 6-week, open label randomized, multicenter study was conducted to evaluate the antidepressant effect and safety of milnacipran and fluoxetine in patients with major depression. Methods : The study was done in patients with major depression diagnosed by DSM-IV who score ≥17 in 17 items Hamilton Rating Scale for Depression (17-item HAM-D) and score ≥25 in Montgomery and Asberg Depression Rating Scale (MADRS). A total of 87 patients were randomized to milnacipran group and fluoxetine group. In cases of the patients taking other antidepressants, 6 weeks of each medication was administered after 7 days of drug excretion period. The evaluation was done using 17 item HAM-D, MADRS, Clinical Global Impression Scale (CGI), and COVI scale after baseline, 1 week, 2 weeks, 4 weeks, and 6 weeks. The side effects that had occurred during the period of our study were put in records by developed/disappeared time, severities, incidences, managements and results. Results : A total of 87 patients were enrolled. 70 (mitnacipran group 39 ; fluoxetine group 31) of them were included for the 6 weeks of research and 17 of them dropped out with in the first week, not due to adverse reactions or deficiency of effects. Total 17 item HAM-D scores, total points of MADRS, and CGI showed significant decrease after 1 week in each treatment group and continued decrease after 2 weeks and 4, 6 weeks. But there was no difference between milnacipran group and fluoxetine group in the antidepressant effect. There were no significant changes in vital sign, CBC, chemistry, and EKG in each treatment group. The commonly reported side elfects of minlacipran were nausea (25.0%), headache (10.7%), vomiting (7.1%),constipation (7.1%), dizziness (7.1%) and those of fluoxetne were GI trouble (11.1%), diarrhea (11.1%), insomnia (11.1%),agitation (5.6%), and dizziness (5.6%). Conclusion : Milnacipran was effective for the improvement of depressive symptoms and was well tolerated and safe in patients with depression.

마이크로 엔드밀링에서 음향방출 신호를 이용한 상태감시

정연식,강익수,김전하,강명창,김정석,안중환 한국공작기계학회 2004 한국공작기계학회 추계학술대회논문집 Vol.2004 No.-

Ultraprecision machining and MEMS technology have been taken more and more important position in machining of microparts. Micro endmilling is one of the prominent technology that has wide spectrum of application field ranging from macro parts to micro products. Also, the method of micro-grooving using micro endmilling is used widely owing to many merit, but has problems of precision and quality of products due to tool wear and tool fracture. This investigation deals with state monitoring using acoustic emission(AE) signal in the micro-grooving. Characteristic evaluation of AE raw signal, AE hit and frequency analysis for state monitoring is also presented in the paper.

일반계 고등학교 교육과정 특성화 방안 연구 : 예체능 과정 설치를 중심으로

홍후조,강익수,백경선 한국교육방법학회 2009 교육방법연구 Vol.21 No.2

This study deals with the problem of enlarging the kinds of courses of academic high schools by installing the ‘core’ school with particularized curriculum such as arts or physical education course tracks as well as academic tracks. For last 60 years Korean general high school have operated two tracks, humanities and social science track, and natural science track. Two traditional tracks did not meet the needs of students and society. Survey were administered to secondary school students and teachers, asking about the curricular needs of new tracks. Based on the results of questionnaires the simulation of allocating students and teachers, and installing facilities according to the curricular tracks was finished. About 30% of middle school graduates want to go to core high schools with particular track rather than traditional tracks.

정신분열병에 대한 리스페리돈의 효과 및 안정성

이민수,김용구,김영훈,연병길,오병훈,윤도준,윤진상,이철,정희연,강병조,김광수,김동언,김명정,김상훈,김희철,나철,노승호,민경준,박기창,박두병,백기청,백인호,손봉기,손진욱,양병환,양창국,우행원,이정호,이종범,이홍식,임기영,전태연,정영조,정영철,정인과,정인원,지익성,채정호,한상익,한선호,한진희,서광윤 大韓神經精神醫學會 1998 신경정신의학 Vol.37 No.1

연구목적 : 본 시험의 목적은 임상시험 시작전에 연구자들을 대상으로 PANSS Workshop을 통하여 PANSS, ESRS에 대한 국내에서의 표준화 작업을 구축하고 새로운 정신병 치료제인 리스페리돈의 효과와 안정성을 재확인하여 리스페리돈 사용에 대한 적정화를 이루는데 있다. 연구방법 : 1996년 4월부터 1996년 9월까지 국내 39개 대학병원 정신과에 입원중인 혹은 증상이 악화되어 입원하는 정신분열병 환자 377명을 대상으로 다시설 개방 연구를 시행하였다. 1주일간의 약물 배설기간을 가진후, 리스페리돈을 8주간 투여하였고, 기준점, 1주, 2주, 4주, 그리고 8주후에 평가되었다. 용량은 제1일에는 리스페리돈 1mg씩 1일 2회, 제2일에는 2mg씩 1일 2회, 제3∼7일에는 3mg씩 1일 2회 투여하였다. 이후 환자의 임상상태에 따라 임의로 증량할 수 있으며, 최대 일일 16mg을 초과하지 않도록 하였다. 추체외로 증상을 조절하기 위한 투약을 허용하였다. 임상증상 및 부작용의 평가는 PANSS(Positive and Negative Syndrome Scale), CGI(Clinical Global Impression) 그리고 ESRS(Extrapyramidal Symptom Rating Scale)을 사용하였다. 연구결과 : 377명중 343명(91%)이 8주간의 연구를 완결하였다. 치료 종결시점인 8주후 PANSS 총점수가 20% 이상 호전된 경우를 약물 반응군으로 정의할때, 약물반응군은 81.3%였다. 리스페리돈에 반응하는 예측인자로는 발병연령, 이전의 입원 횟수, 유병기간이 관련 있었다. 리스페리돈은 1주후부터 PANSS양성, 음성, 및 일반정신병리 점수상에 유의한 호전을 보여 효과가 빨랐다. CGI의 경우도 기준점에 비해 1주후부터 유의한 감소를 나타내었다. ESRS의 경우, 파킨슨 평가점수는 기준점과 비교해 투여 1주, 2주, 4주후 유의하게 증가되었다가 8주후 기준점과 차이가 없었다. Dystonia 평가점수는 1주후만 유의한 증가를 보였으며, dyskinesia 평가점수는 유의한 차이가 없었다. 혈압, 맥박수의 생명징후 및 일반 혈액학 검사, 생화학적 검사, 심전도 검사에서 유의한 변화는 없었다. 결 론 : 이상의 다시설 개방 임상 연구를 통해 리스페리돈은 정신분열병 환자에서 양성증상뿐만 아니라 음성증상 및 전반적인 증상에도 효과적인 것으로 사료된다. 보다 명확한 평가를 위해서는 다른 항정신병약물과의 이중맹검 연구가 필요할 것으로 생각되며, 또한 장기적 치료에 대한 평가도 함께 이루어져야 하겠다. Objective : The purpose of this study was to investigate the efficacy and safety of risperidone in the treatment of Korean schizophrenic patients. Method : This multicenter open study included 377 schizophrenic patients drawn from 39 university hospitals. After a wash-out period of 1 week, the schizophrenic patients were treated with risperidone for 8 weeks and evaluated at 5 points ; at baseline, and 1, 2, 4 and 8 weeks of treatment. The dose was increased from 2mg/day(1mg twice daily) to 6mg/day(3mg twice daily) during the first week and adjusted to a maximum of 16mg/day over the next 7 weeks according to the patient's clinical response. Medication to control extrapyramidal symptoms was permitted. The psychiatric and neurological status of the patients was assessed by PANSS, CGI, and ESRS scales. Results : 343(91%) of 377 patients completed the 8-week trial period. Clinical improvement, as defined by a 20% or more reduction in total PANSS score at end point, was shown by 81.3% of patients. The predictors of response to risperidone were associated older age, shorter duration of illness, fewer previous hospitalization. Risperidone had rapid onset of action ; a significant decrease of the total PANSS and three PANSS factor(positive, negative, general), and CGI was already noticed at the end of first week. For the ESRS, parkinsonism rating scores were significantly increased until week 4 comparing with baseline. Dystonia rating scores were significantly increased until week 1, and dyskinesia rating scores were not significantly changed during the study. Laboratory parameters including vital sign, EKG, hematological, and biochemical values showed no significant changes during the trial. Conclusions : This study suggests that risperidone is generally safe and effective against both the positive and negative symptoms in our group of patients.

C-means 알고리즘을 이용한 마이크로 엔드밀의 상태 감시

권동희,정연식,강익수,김전하,김정석 한국공작기계학회 2005 한국공작기계학회 춘계학술대회논문집 Vol.2005 No.-

Recently, the advanced industries using micro parts are rapidly growing. Micro end milling is one of the prominent technology that has wide spectrum of application field ranging from macro to micro parts. Also, the method of micro-grooving using micro end milling is used widely owing to many merit, but has problems of precision and quality of products due to tool wear and tool fracture. This study deals with condition monitoring using acoustic emission(AE) signal in the micro-grooving. First, the feature extraction of AE signal directly related to machining process is executed. Then, the distinctive micro end mill state according to the each tool condition is classified by using the fuzzy C-means algorithm, which is one of the methods to recognize data patterns. These result is effective monitoring method of micro end mill state by the AE sensing techniques which can be expected to be applicable to micro machining processes in the future.