• 한국도로학회논문집
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• 제15권2호
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• pp.159-167
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• 2013

PURPOSES : In this study, the effects of when median exclusive bus lanes were applied to Daejeon trunk road (Wolpyeng crossway~Seodaejeon crossway, 6.3km) and (Daeduck Bridge 4~Kyeryong 4, 2.6km) by Microscopic Simulation VISSIM (5.0) was studied. The median exclusive bus lanes are one of the measures of transportation system manage techniques that can especially improve the efficiency of public transportation facilities. METHODS : According to the analysis of VISSIM on the Gyerong mainroad and Daedeok mainroad, when the median exclusive bus lanes were applied unlike when the roadside bus-only lanes were applied, the average travel speed of vehicles decreased but the average delay time and travel time increased. This arised from the changes in the geometric structure of the road which occurred the reduction of vehicle lane in the center of the road. RESULTS : In the case of bus, on the other hand, the average travel speed increased but the average delay time and travel time decreased. This is because the problems such as illegal parking and stopping, secondary road in out vehicle, and conflict of intersection right turn that roadside bus-only lanes occurred was solved. CONCLUSIONS : Although the introduction of median exclusive bus lanes will have a negative effect on general traffic flow due to the aggravation of travel, decrease of passenger car usage will lead to decrease of traffic volume. Therefore, smooth vehicle travel is expected.

• 한방안이비인후피부과학회지
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• 제15권1호
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• pp.63-75
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• 2002

Based upon our laboratory experiments of Yongdamsagantang subtracted Bupleuri Radix and Yongdamsagantang subtracted Bupleuri Radix added Biotac Cacumen, Imperatae Rhizoma, Typhae Pollen on male rats to examine the medicines' hemostatic effect, we draw conclusions as follows: 1. Compared to the control group, Yongdamsagantang subtracted Bupleuri Radix and Yongdamsagantang subtracted Bupleuri Radix added Biotae Cacumen, Imperatae Rhizoma, Typhae Pollen increased the number of platelet counts meaningfully. 2. Compared to the control group, Yongdamsagantang subtracted Bupleuri Radix and Yongdamsagantang subtracted Bupleuri Radix added Biotae Cacumen, Imperatae Rhizoma, Typhae Pollen suppressed prothrombin time without any meaning. 3. Compared to the control group, Yongdamsagantang subtracted Bupleuri Radix and Yongdamsagantang subtracted Bupleuri Radix added Biotae Cacumen, Imperatae Rhizoma, Typhae Pollen, all of these medicines elevated the fibrinogen level, but only Yongdamsagantang subtracte Bupleuri Radix is recognized to raise the fibrinogen level meaningfully. 4. Compared to the control group, Yongdamsagantang subtracted Bupleuri Radix and Yongdamsagantang subtracted Bupleuri Radix added Biotae Cacumen. Imperatae Rhizoma, Typhae Pollen repressed partial thromboplastin time meaningfully. In conclusion, Yongdamsagantang subtracted Bupleuri Radix and Yongdamsagantang subtracted Bupleuri Radix added Biotae Cacumen, Imperatae Rhizoma, Typhae Pollen can be used for stopping blood effectively in terms of platelet count increase, prothrombin time control, fibrinogen level rise, and partial thromboplastin time suppression.

• 사상체질의학회지
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• 제33권3호
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• pp.161-170
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• 2021

Introduction Hand eczema is dermatitis that occurs on the hand and fingers. In this case, the patient had chronic hand eczema that had relapsed for 3 years, worsened for 6 months, and did not improve even with standard dermatological treatment. We report significant improvement of the patient with chronic hand eczema, diagnosed with Soeunmin Greater Yin Symptomatology based on Sasang Constitutional Medicine. Methods We prescribed herbal medicine, Sibimigwanjung-tang(十二味寬中湯), and the western medications were continued throughout the treatment period. To evaluate the treatment progression, we observed objective and subjective symptoms and took pictures of the patient's hands. Results At the first time of the outpatient visit, the patient complained of pain, oozing, scaling and severe itching even though she had taken dermatological medication for over 6 months. After 8 weeks of Korean medicine treatment, most symptoms showed improvement, and after about 47 weeks of treatment, the symptoms maintained 90% improvement even after stopping western medications and herbal medications. Conclusion The patient in this case showed a significant improvement of chronic hand eczema and the improvements have been maintained even stopping western medications and herbal medications during follow-up for 15 weeks. In addition, the patient showed improvement and maintenance of general conditions as well as skin-related symptoms. In this case, we can concern the effect of the Sasang Constitutional Medicine focused on treating the patient's general pathology as well as the patient's chief complaint at chronic hand eczema not responding to standard dermatological treatment.

• 대한교통학회지
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• 제35권3호
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• pp.234-246
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• 2017

서울시 버스는 통행속도 및 정시성을 높이기 위해 BIS정보제공, 중앙버스전용차로, 간선급행버스, 버스 우선 신호 등을 선보이며 서비스 개선에 큰 역할을 하였다. 하지만 버스의 통행속도 및 정시성을 높이기 위해서는 버스 정류장 정차시간에 영향을 미치는 정류장 인근 시설물의 개선이 필요하다. 본 연구는 버스정류장 정차시간 개선을 위해 정류장 인근 교통시설물 및 도로환경을 중심으로 영향변수를 도출하고자 한다. 종속변수는 버스정류장의 진 출입시간 및 진 출입시간의 표준편차를 선정하였고, 독립변수는 버스종류별 노선수, 버스종류별 통행량, 버스베이 개수, 횡단보도 및 교차로까지 거리, 앞지르기 가능 유무, 이면도로 존재 유무, 승차 및 하차인원, 해당링크구간 속도를 선정하였다. 분석결과 해당 링크의 속도, 버스베이개수, 횡단보도까지 거리, 이면도로 유무, 앞지르기 가능 여부가 영향변수로 도출되었고, 진 출입시간의 표준편차는 교차로까지 거리, 횡단보도까지 거리, 이면도로 존재 여부가 선정되었다. 이처럼 버스 정류장 정차시간 및 정시성의 영향을 주는 변수는 다양한 요소가 도출되는 만큼 본 연구 결과를 통해 버스 정류장의 정차시간 및 정시성을 개선시킬 필요가 있다.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 1997년도 한국자동제어학술회의논문집; 한국전력공사 서울연수원; 17-18 Oct. 1997
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• pp.1481-1484
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• 1997

The vehicle driving simulator expects vehicle motion with real-time simulation arise from driver's steering, accelerating, stopping and simulates motion of vehicl with visula, audio and washout algorithm. And it gives a vivid feeling to driver in reality. Vehicle driving simulator with vehicle integration control system is used for analysis of analysis of vehicle controllaility, steering capacity and safety in various pseudo environment alike. basides, it analyzeds vehicle safety factor dirver's reaction and promotes traffic safety without driver's own risks. The main proceduress of development of the vehicle driving simulator are classified by 3 parts. first the motion base system which can be generated by the motion queues, should be developed. Secondly, real-time vehicle software which can afford the vehicle dynamics, might be constructed. The third procedure is the integration of vehicle driing simulator which can be interconnected between visual systems with motion base. In this study, we are to study of the motion base for a vehicle driving simulator design and that of its real time control and using an extra gyro sensor and accelerometers to find a position and an orientatiion of the moving platform except for calculating forward kinematics. To drive the motion base, we use National Instruments corp's Labview software. Furthemore, we use analysis module for the vehicle motionand the washout algorithm module to consummate driving simulator, which can be driven by human in reality, so we are doing experimentally process about various vehicle motion conditon.

• 품질경영학회지
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• 제46권3호
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• pp.411-424
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• 2018

Purpose: The purpose of this study is to improve submarine TACM launcher system safety device performance. Methods: In this study, EPLD(Electrically Programmable Logic Device) control and time sharing method to the safety device actuator motor and discrete signal processor in launch control panel were used to resolve unusual performance of safety system. Results: The result of this study are as follows; First, sporadic stopping of safety device actuator motor due to insufficient In-Rush current was resolved. Second, repeat of safety device condition as lock & release due to chattering for motor activating was resolved. Third, simultaneous release function for safety device actuator was available. Conclusion: The unusual performance of function for submarine TACM launcher system was overcame by applying EPLD control and time sharing method. The suggestions were proved by performance test in the pressure chamber. The results of this study enhanced survivability of ${\bigcirc}{\bigcirc}{\bigcirc}$ class submarine from enemy torpedo.

• 산업경영시스템학회지
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• 제43권1호
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• pp.61-69
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• 2020

Systems such as database and socal network systems have been broadly used, and their unexpected failure, with great losses and sometimes a social confusion, has received attention in recent years. Therefore, it is an important issue to find optimal maintenance plans for such kind of systems from the points of system reliability and maintaining cost. However, it is difficult to maintain a system during its working cycle, since stopping works might incur users some troubles. From the above viewpoint, this paper discusses minimal repair maintenance policy with periodic replacement, while considering the random working cycles. The random working cycle and periodic replacement policies with minimal repair has been discussed in traditional literatures by usually analyzing cases for the nonstopping works. However, maintenance can be more conveniently done at discrete time and even during the working cycle in real applications. So, we propose that periodic replacement is planned at discrete times while considering the random working cycle, and moreover provide a model in which system, with a minimal repair at failures between replacements, is replaced at the minimum of discrete times KT and random cycles Y. The average cost rate model is used to determine the optimal number of periodic replacement.

• 디지털융복합연구
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• 제14권8호
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• pp.245-252
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• 2016

본 연구는 현재 운영 중인 자동기상관측장비인 ASOS와 AWS의 결측에 대해 안공신경망을 활용하여 주변 관측값을 기반으로 결측을 보완하기 위한 연구이다. 2011년부터 2015년까지 수집된 서울지역 기온, 습도, 풍속을 대상으로 학습데이터를 구성하고 인공신경망을 통해 학습모델을 구축하였으며, 서울관측소를 결측으로 가정하고 학습 모델에 대한 검증을 수행하였다. 학습횟수 증가에 따른 민감도 실험 결과 초기종료는 학습횟수 2,000회에서 나타났다. 관측과 추정치의 상관관계는 모든 기상변수에서 0.6이상이었으며 기온과 습도의 경우 각각 0.9, 0.8 이상의 높은 상관성을 보였다. RMSE는 대부분 기상변수에 대해 학습횟수가 증가함에 따라 꾸준히 감소하지만 풍속의 경우 뚜렷한 증감 경향이 나타나지 않았다. 학습시간은 학습횟수가 증가할수록 지수함수적으로 증가하는 경향을 보였다. 학습 횟수 40회의 ANN 성능은 초기종료 시점까지 향상된 결과에 80%이상의 효과를 볼 수 있으며 2초 내의 빠른 학습시간으로 신속한 결측 보완을 통해 보다 상세한 기상정보의 활용이 가능할 것으로 기대된다.

• 대한산업공학회지
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• 제32권1호
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• pp.9-17
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• 2006

This paper deals with a discrete simulation optimization method for designing a complex probabilistic discrete event simulation. The developed algorithm uses the configuration algorithm that can change decision variables and the stopping algorithm that can end simulation in order to satisfy the given objective value during single run. It tries to estimate an auto-regressive model for evaluating correctly the objective function obtained by a small amount of output data. We apply the proposed algorithm to M/M/s model, (s, S) inventory model, and known-function problem. The proposed algorithm can't always guarantee the optimal solution but the method gives an approximate feasible solution in a relatively short time period. We, therefore, show the proposed algorithm can be used as an initial feasible solution of existing optimization methods that need multiple simulation run to search an optimal solution.

• 한국전산응용수학회:학술대회논문집
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• 한국전산응용수학회 2003년도 KSCAM 학술발표회 프로그램 및 초록집
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• pp.14-14
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• 2003

Given a sequence ｛ $X_{n}$｝ of independent and identically distributed random variables with F, a sequential procedure for the p-th quantile ξ$_{P}$= $F^{-1}$ (P), 0$\beta$-protection. Some asymptotic properties for the proposed procedure and of an involved stopping time are proved: asymptotic consistency, asymptotic efficiency and asymptotic normality. From one of the results an effect of smoothing based on kernel functions is discussed. The results are also extended to the contaminated case.e.e.