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항공 응용 분야 : 기계학습 알고리즘을 이용한 UAS 제어계수 실시간 자동 조정 시스템
송동호 ( Dong Ho Song ),문미선 ( Mi Sun Moon ),송강 ( Song Kang ) 한국항행학회 2010 韓國航行學會論文誌 Vol.14 No.6
무인기의 자동 비행 제어 시스템은 기체의 형태, 크기, 무게 등의 정적 및 동적 변화에 따라 스스로 비행계수를 조정하여 목표 비행궤적을 정확히 따라가도록 제어할 필요가 있다. 본 논문에서는 PID 제어 기법을 이용하는 비행제어시스템에 기계학습모듈(MLM)을 추가하여 기체의 특성 변화에 따라 제어계수를 비행중 실시간 자동으로 조정하는 시스템을 제안한다. MLM은 선형회귀분석과 보정학습을 이용하여 설계되었으며 MLM을 통해 학습된 제어계수의 적합성을 평가하는 평가모듈(EvM)을 함께 모델링 하였다. 이 시스템은 FDC 비버 시뮬레이터를 기반으로 실험하였으며 그 결과를 분석 제시하였다. A automatic flight control system(AFCS) of UAS needs to control its flight path along target path exactly as adjusts flight coefficient itself depending on static or dynamic changes of airplane`s features such as type, size or weight. In this paper, we propose system which tunes control gain autonomously depending on change of airplane`s feature in flight as adding MLM(Machine Learning Module) on AFCS. MLM is designed with Linear Regression algorithm and Reinforcement Learning and it includes EvM(Evaluation Module) which evaluates learned control gain from MLM and verified system. This system is tested on beaver FDC simulator and we present its analysed result.
수술전 간호정보제공이 복부수술 환자의 수술 후 간호만족도에 미치는 효과
김춘길,문미선 성인간호학회 1999 성인간호학회지 Vol.11 No.3
This study was intended to examine the effects of providing nursing information about surgery in a surgical ward over a 50 day period from September, 1st to October 20th, 1998 in K University Hospital in Seoul. This quasi-experimental study used only a nonequivalent control group and an adopted post-test. A total of 54 patients were assigned to the control and experimental groups according to their admission dates to the hospital. Those who entered from September, 1st to 20th were selected as the control group, while those patients admitted from September 21th to October 20th were chosen as the experimental group. The experimental group consisted of 27 patients and received planned nursing information using a booklet. The twenty seven patients in the control group received the usual pre-operative (pre-op) care. The patient's satisfaction was measured on the 4th day after surgery with a post-operative (post-op) Satisfaction Scale. The scale was developed by Lee, Yoon Hee(1995) and modified by the present researchers. No significant general characteristic differences were found between the control and the experimental groups. The booklet included information on tests and treatment about the operation and preventive methods for post-op complications, such as deep breathing & coughing, position change, lower extremity exercise, early ambulation, aseptic technique, observation of bleeding, use of equipment, and proper food management. Data was analyzed using the χ²-test, t-test, ANOVA, and Pearson correlation coefficient through an SPSS computer program. The results were as follows: 1. The hypothesis that the patients who were provided with planned nursing information would have a higher satisfaction level than those who received usual nursing care was supported(t=8.48, P=0.0004). 2. The mean score of the Satisfaction Scale was higher in experimental group than that of the control group. In particular, the experimental group was highly satisfied with the items such as 'nurse has patience' and 'skillful injection giving'. The control group showed the highest score with the item of 'nurse co-works treatment with medical team'. Both groups revealed the lowest score with the item of 'explanation about test results'. 3. No significant correlation was observed between the patients' satisfaction and their general characteristics. Those satisfaction scores measured before and after the operation did not correlate significantly(r=0.097, P=0.790). The above findings indicate that the provision of planned nursing information before surgery improved patient's satisfaction after abdominal surgery. Accordingly, nurses should provide information about the operation before surgery to increase patient's satisfaction, which in turn promotes the quality of their nursing care.
성인 지역사회 폐렴의 원인 미생물에 대한 전향적 다기관 연구 : 마이코플라즈마와 클라미디아의 역할
주철현,윤하정,남정현,문미선,조영걸,우준희,강재명,신완식,김양리,김민자,정희진,이환종,김유겸 대한감염학회 2001 감염 Vol.33 No.1
Background : The purpose of this study is to develop a rapid and sensitive method to detect M. pneumoniae and C. pneumoniae. In addition, we prospectively investigated the prevalence of M. pneumoniae and C. pneumoniae infections in community-acquired pneumonia. Methods : The nasopharyngeal aspirates were collected from truly 1997 to April 2000. PCR or nested PCR techniques were used to detect causative agents. RFLP and nucleotide sequence analysis were performed to study molecular epidemiology. Furthermore, feasibility of one-step technique to detect two microorganisms was tested by multiplex PCR. Results : Of 250 clinical specimens, 23 (9.2%) specimens were positive for M. pneumoniae and 33 (13.2%) for C. pneumoniae, including one dual-infected specimen. Most M. pneumoniae infection occurred during the colder months of the year. C. pneumoniae infection was predominantly found from December to February. Conclusion : The results indicate that M. pneumoniae and C. pneumoniae infections are frequently found from patients with community-acquired pneumonia. (Korean J Infect Dis 33: 15-23, 2001)