데스크탑 밀링머신의 고속 스핀들 설계 해석

장성현,황현영,정우영,홍정표,최영휴 한국공작기계학회 2009 한국공작기계학회 춘계학술대회논문집 Vol.2009 No.-

During a decade, there are many researches on microfactory which is the miniature, flexible, and efficient manufacturing system for the micro/meso scale machining device. Moreover many micro machine tool has developed in Japan, U.S., Europe, and Korea. Already we are developing a desktop milling machine with 380×450×450 ㎣ machine size for microfactory or BT (Bio technology) factory. In this study, we carried out the design analysis of a high speed spindle system for our desktop milling machine by using ADROS, which is our own developed S/W for dynamic design analysis of rotor systems. As the result, we obtained some analyzed dynamic characteristics of a spindle system, such as natural frequency, whirl frequency, critical speed, and harmonic response.

물질남용 치료프로그램 후 재범여부에 대한 예비적 추적조사 연구

김현수,조선미,오은영,임기영,정영기,윤웅장,이영미 大韓神經精神醫學會 1999 신경정신의학 Vol.38 No.6

연구목적: 본 연구는 물질사범에게 시행되는 수강명령 프로그램의 효과를 재범률을 중심으로 살펴보고자 한 것이다. 방 법: 이 연구의 대상집단은 보호관찰소에서 의뢰받은 물질남용자집단이다. 이들은 법원으로부터 보호관찰, 수강명령, 치료명령, 사회봉사 등을 부과받았다. 총 104명의 대상자집단을 치료프로그램을 이수한 수강군과 비수강군으로 나누었으며 이들에 대한 재범률을 조사하였다. 결 과: 프로그램을 이수한 수강군이 비수강군에 비해 재범률이 낮았다(p<.05). 또한 단기 수강군과 장기수강군의 재범률의 차이를 조사하였는데 대상자 집단의 수가 적기 때문에 장기 수강군의 효과가 통계적으로 입증되지는 않았다. 결 론: 우리는 물질남용자에 대한 정책이 보다 교육적으로 변화할 것을 본 논문을 통하여 제시하려 하였으며 정부 및 법무부는 물질남용자에게 교육과 치료를 제공해주어야만 한다. Objectives: Using recidivism rate, we investigated the outcome after our substance abuse treatment program had been implemented. Methods: Our target population was substance abuse criminals referred by probational office. They either received the parole and probation order, treatment order or social service order from the court. We divided 104 substance abuse criminals into treatment group and non-treatment group. We examined their recidivism rate. Results: We reached a conclusion that treatment group had lower recidivism rate than non-treatment group(p<.0.5). We examined the effectiveness of short-term and long-term programs. However, no effectivess of long-term program was found because the sabject number was too small. Conclusion: We suggest that the strategies for substance abuse should be changed to more educative ones. The Government and Ministry of Justice must provide education and treatment to the substance abuse criminals.

40세 이하 관상동맥 질환자에서 장기적 임상 관찰

이승욱,정명호,박종철,박형욱,조상희,김원,김계훈,이상현,강경태,조장현,김남호,김건형,안영근,조정관,박종춘,강정채 全南大醫大 2001 전남의대학술지 Vol.37 No.2

구강악안면외과에서 의식하진정에 필요한 Midazolam용량에 관한 연구

장재현,김성민,김소희,박영욱 대한악안면성형재건외과학회 2002 Maxillofacial Plastic Reconstructive Surgery Vol.24 No.3

Conscious sedation is a minimally depressed level of consciousness that retains the patients' ability to maintain the airway continuously and to respond appropriately to physical stimulation and verbal command at any time, produced by a pharmacologic or nonpharmacologic method or a combination thereof. In dental anesthesia, a state of sedation in which the conscious patient is rendered free of fear, apprehension and anxiety through the use of pharmacologic agents. Midazolam is a useful drug of benzodiazepine on minor operation of dentistry. The purpose of this study is to estimate the appropriate dosage protocol of Midazolam to the patient receiving intravenous sedation at the department of oral and maxillofacial surgery. Total subject was fifty-one patients and fifteen patients of this subject were decided to control group that they were not received intravenous sedation. The experimental group was randomly subdivided into two groups and each of those groups was administrated to 0.05 ㎎/㎏ and 0.08 ㎎/㎏ each other. All patients of the subject were surveyed with postoperative one day questionaire to evaluate the level of sedation. We found that the result was statistically significant between the experimental and the control, and so we present the protocol of the department of oral and maxillofacial surgery, Kangnung National University Dental Hospital.

악하부종괴에 대한 임상적 연구

장현석,유준영 大韓顎顔面成形再建外科學會 1996 Maxillofacial Plastic Reconstructive Surgery Vol.18 No.4

There are many kind of diagnostic entities in submandibular or neck masses, and we can set up treatment plan and estimate treatment result, prognosis by accurate diagnosis. By reasoning medical and dental history, physical examination, anatomical consideration of masses in submandibular or neck area, location of masses, laboratory and radiographic studies, we can formulate a clinical diagnosis or differential diagnosis. Although a clinical diagnosis might suffice in some instances, a definitive(microscopic) diagnosis is frequently required for proper treatment. In order to get some information about making accurate diagnosis and setting up appropriate treatment plan, we did clinical study and histopathologic classification of 82 patients who visited and were operated for sudmandibular masses at Department of Oral and Maxillofacial Surgery in Seoul National University Hospital from 1988 to 1992. The result were as follows: 1. Submandibular masses occured most frequently in forties and fifties, and there was no sex predilection. 2. Chief complaints were in order of mass, swelling, pain and consistency were sofe mass, mobile hard mass, firm mass, diffuse swelling in descending order. 3. Most frequent pathologic finding was lymphadenitis. 4. Site of submandibular masses were submandible, neck, submental, retromandible in descending order, and there was no predilection between left and right side. 5. Accuracy rate between clinical impression and result was 51.2%.

시간스케일에 따른 해양표면수온과 기온의 변동 및 상관연구

장이현,강용균,서영상 한국환경과학회 2000 한국환경과학회지 Vol.9 No.4

The relationship between air temperature and sea surface temperature are studied using the daily air temperature and sea surface temperature data for 25 years (1970∼1994) at 9 coastal stations in Korea. Seasonal variations of air temperature have larger amplitudes than those of sea surface temperature. The seasonal variations of air temperature leads those of sea surface temperature by 2 to 3 weeks. The anomalies of sea surface temperature and air temperature are positively correlated. The long term anomalies of sea surface temperature and air temperature with time scales more than 1 month are more highly correlated than those of short term, with time scales less than 1 month. Accumulated monthly anomalies of sea surface temperature and air temperature for 6 months showed higher correlation than the anomalies of each month. The magnitudes of sea surface temperature and air temperature anomalies are related with the duration of anomalies. Their magnitudes are large when the durations of anomalies are long.

유방암의 위와 대장전이

유현아,김은영,서민지,정은,조민정,오현진,장지혜,박지찬,이정의,박석영 이화여자대학교 의과학연구소 2014 EMJ (Ewha medical journal) Vol.37 No.2

Gastric metastasis from breast cancer is rare and only six cases have been reported in Korea. Colon metastasis is more rare than gastric metastasis. We report a 63-year-old woman with gastric and colon metastases of invasive lobular carcinoma of breast. She was diagnosed as right breast cancer, received right modified radical mastectomy 10 years ago and has been treated with chemotherapy and hormone therapy. Investigating for melena and a small caliber of stool, we found gastric and colon metastases. The diagnosis of metastatic breast cancer was made through gross pathologic and immunohistochemistry staining. We report a case with gastric and colon metastases from breast cancer and a review of the associated six case reports in Korea.

6차와 개편된 7차 교육과정 중학교 과학 교과서 생물영역에 대한 비교 분석

장은영,조현욱,김종홍 順天大學校 師範大學 附屬 科學敎育硏究所 2002 科學과 敎育 Vol.10 No.-

The purpose of this study is to compare and analyze the biology area of the 6th and the revised 7th curriculum in the middle school The 6th curriculum emphasized the research activities. It also gave emphasis on the biological materials in our surroundings, field studies, open questions and various applications and the participation in scientific events, while the new curriculum points on the ability to group either between classes or within classes. In―depth and supplementary differentiated curriculum in the 7th curriculum makes "level―based differentiated curriculum" possible and stresses the synthetic research activities, which deal with fundamental notions and the research processes. Looking into the degree of emphasis for each scientific area, the new textbooks have 12 chapters, but the old textbooks have 4 chapters. The allotment of each scientific area is almost same in the new textbooks, through matter (22.7%) takes up less pages than other areas. In the old textbooks, the number of pages allotted for biological subjects is 28.4% and takes up more pages than other areas. The content dealing with biological area comprises 67.5 pages of the new textbooks and 77 pages of the old textbook. The items analyzing constituents for the research activities appear in the new textbooks. These constituents are planning observing and assuming, investigating, reading and building ideas. The common experiments in both textbooks are 22 in the new textbooks, and 11 in the old textbooks.

HD 64180 을 이용한 제어컴퓨터시스템의 설계 및 구현

張榮賢 배화여자대학 1993 培花論叢 Vol.11-12 No.-

This paper is proposed for designing and implementation of control computer system using HD64180 microprocessor. Control computer systems that have event and logging printer device, text displayer, subcomputer by communication, keyboard, analog I/O, digital I/O and pluse I/O control and monitor the device of factory field. The system software consists of realtime monitor, Interrupt service routine and input/output handler. Each handler module is determind in order to control and monitor efficiently input/output device. Realtime monitor module is deter-mind in order to control efficiently computer environments and tasks. Interrupt service routines process multifariouse events which occur by chance using interrupt vector table. For demonstration control computer system, we have conducted a simulation and practiced with commercial HD64180 cpu board, A/D and D/A board, analog I/O board, digital I/O board and pluse board.

재구성 가능형 공작기계의 주축 시스템 설계

장성현,정용민,황현영,최영휴,박종권 한국공작기계학회 2008 한국공작기계학회 춘계학술대회논문집 Vol.2008 No.-

During a decade, there are many researches on microfactory which is the miniature, flexible, and efficient manufacturing system for the micro/meso scale machining device. Moreover many micro machine tool has developed in Japan, U.S., Europe, and Korea. Already we developed a 3-axis micro milling machine with 300×200×320 ㎣ machine size for microfactory. In this study, we introduce the design of a high speed spindle system with air bearings for our micro milling machine. Desired operation speed range of the spindle system is 100,000 ~ 150,000 rpm. In. design step, we have consideration for minimum critical speed, compliance, and weight construction of the spindle system. The shaft length, the shaft outer diameter, bearing positions and bearing stiffness were set as the design values. After the final design of spindle model, we carried out dynamic analysis a spindle system for a micro milling machine by using ADROS, which is our own developed S/W for dynamic design analysis of rotor systems. As the result, we designed a spindle system having the critical speed above the operating speed.