• 한국공작기계학회:학술대회논문집
• /
• 한국공작기계학회 2004년도 추계학술대회 논문집
• /
• pp.369-374
• /
• 2004

Web-based analysis programs for reliability assessment of machine tools were developed in this study. First, the reliability data analysis program was developed to search for failure rate using failure data and reliability test data of mechanical part. Second, failure mode analysis was developed through performance tests like circular movement test vibration test for machine tools. This analysis program shows correlation between failure mode and performance test result. Third, tool life was predicted by correlation between flank wear and cutting time, using the extended Taylor tool life equation in turning data and the equivalently converted equation in order to apply ball endmill data to Taylor tool life equation in milling data. All the information related to input and result data can be stored in theses programs.

• PNF and Movement
• /
• 제9권1호
• /
• pp.55-63
• /
• 2011

Purpose : This study was to investigate the application of Rhythmic Initiation(RI) in the respect of information processing in motor learning. Methods : A computer-aided literature search was performed in PubMed and adapted to the other databases and the others were in published books. The following keywords were used: Rhythmic Initiation, attention, memory, motor accuracy, feedback, motor learning, motor control, PNF, cognition. Results : The characterization of RI is rhythmic motion of limb or body through the desired range, starting with passive motion and progressing to active resisted movement. This study suggested that the relationship between of RI and motor learning through the respect of information processing, memory, attention and motor accuracy. Conclusion : Only Rhythmic Initiation, specifically focused on the effects of information processing approach, suggesting that RI can be positively influeced on sensory-perception, attention, memory, motor accuracy. however, it is unclear whether positive effects in the laboratory and field can be generalized to improve. In addition, sustainability of motor learning with RI remains uncertain.

• 해양환경안전학회:학술대회논문집
• /
• 해양환경안전학회 2005년도 추계학술대회지
• /
• pp.7-14
• /
• 2005

최근 우리나라 수역에서는 입출항 선박 및 주변해역을 통항하는 선박의 교통량이 꾸준히 증가하고 있고, 또 해상레저활동이 활발해지면서 해양사고의 개연성이 커지고, 이에 따른 인명$\cdot$재산 피해의 규모도 크게 증대될 것으로 예상된다. 이에 따라 본고에서는 해양사고 발생시 인명$\cdot$재산 피해를 최소화하기 위한 국제적 움직임과 선진해양국 수색구조시스템 및 우리나라의 수색구조시스템을 조사, 비교함으로써 우리나라의 해상수색구조시스템의 효율적 운영 방안을 제시하고자 하였다.

• International Journal of Fuzzy Logic and Intelligent Systems
• /
• 제9권4호
• /
• pp.275-280
• /
• 2009

A Genetic Algorithm (GA) is a kind of search techniques used to find exact or approximate solutions to optimization and searching problems. This paper discusses the design of a genetic algorithm-based intelligent parking system. This is a search strategy based on the model of evolution to solve the problem of parking systems. A genetic algorithm for an optimal solution is used to find a series of optimal angles of the moving vehicle at a parking space autonomously. This algorithm makes the planning simpler and the movement more effective. At last we present some simulation results.

• ETRI Journal
• /
• 제30권3호
• /
• pp.421-431
• /
• 2008

In this paper, we offer a new technique to discover frequent spatiotemporal patterns from a moving object database. Though the search space for spatiotemporal knowledge is extremely challenging, imposing spatial and timing constraints on moving sequences makes the computation feasible. The proposed technique includes two algorithms, AllMOP and MaxMOP, to find all frequent patterns and maximal patterns, respectively. In addition, to support the service provider in sending information to a user in a push-driven manner, we propose a rule-based location prediction technique to predict the future location of the user. The idea is to employ the algorithm AllMOP to discover the frequent movement patterns in the user's historical movements, from which frequent movement rules are generated. These rules are then used to estimate the future location of the user. The performance is assessed with respect to precision and recall. The proposed techniques could be quite efficiently applied in a location-based service (LBS) system in which diverse types of data are integrated to support a variety of LBSs.

• 한국전문물리치료학회지
• /
• 제19권2호
• /
• pp.59-68
• /
• 2012

This meta-analysis investigated the effects on arm motor impairment, arm motor function and disability, and psychological aspects of constraint-induced movement therapy (CIMT) for upper extremity hemiparesis following stroke, based on Korean studies. A comprehensive search of the complete Korean studies information service system (KISS), Research Information Sharing Service (RISS), Korea National Library, and the Korean Medical Database to September 2011 was conducted. Eleven eligible controlled clinical trials compared CIMT to a control group or an alternative treatment. All outcome measures of arm motor impairment, arm motor function and disability, and psychological aspects were pooled for calculating effect size. The overall effect size of CIMT was .700 (95% confidence interval=.482~.918). The CIMT programs showed large effect on the aspect of arm motor function and disability (the effect size is .920) and the psychological aspect (the effect size is .946). The effect of CIMT on arm motor impairment was moderate (the effect size is .588). These results show that CIMT may improve upper extremity motor impairment, function and disability, and psychological aspects following stroke. However, these results were based on a small number of studies, and not all of them were randomized control trials. Additional research is needed to include larger well-designed trials to resolve these uncertainties.

• Nuclear Engineering and Technology
• /
• 제42권3호
• /
• pp.329-338
• /
• 2010

We developed an achievable control logic for the reactor power level during a power maneuvering event and set up some constraints for the control of the reactor power in a conceptual sodium-cooled fast reactor (KALIMER-600) that was developed at KAERI. For simulating the dynamic behaviors of the plant, we developed a fast-running performance analysis code. Through various simulations of the power maneuvering event, we evaluated some suggested control logic for the reactor power and found an achievable control logic. The objective of the control logic is to search for the position of the control rods that would keep the average temperature of the primary pool constant and, concurrently, minimize the power deviation between the reactor and the BOP cycle during the power maneuvering. In addition, the flow rates of the primary pool and the intermediate loop should be changed according to the power level in order to not violate the constraints set up in this study. Also, we evaluated some movement speeds of the control rods and found that a fast movement of the control rods might cause the power to fluctuate during the power maneuvering event. We suggested a reasonable movement speed of the control rods for the developed control logic.

• 제어로봇시스템학회논문지
• /
• 제8권2호
• /
• pp.142-150
• /
• 2002

This paper presents a systematic method of the zigzag gait planning for quadruped walking robots. When a robot walks with a zigzag gait, its body is allowed to move from side to side, while the body movement is restricted along a moving direction in conventional continuous gaits. The zigzag movement of the body is effective to improve the gait stability margin. To plan a zigzag gait in a systematic way, the relationship between the center of gravity(COG) and the stability margin is firstly investigated. Then, new geometrical method is introduced to plan a sequence of the body movement which guarantees a maximum stability margin as well as monotonicity along a moving direction. Finally, an optimal swing-leg sequence is chosen for a given arbitrary configuration of the robot. To verify the proposed method, computer simulations have been performed for both cases of a periodic gait and a non-periodic gait.

• 대한한의진단학회지
• /
• 제15권3호
• /
• pp.223-234
• /
• 2011

Objectives: This study shows feasibility and suitability of a microelectromechanical system inertial measurement unit(MEMS-IMU) as a helpful measurement device for evaluating movement system impairment syndrome. Methods: We reviewed articles of two fields in this study. First, we reviewed articles about movement system impairment syndrome(MSIS) as a brand new viewpoint of diagnosing and treating musculoskeletal pain. Second, we reviewed articles about conventional motion analysis system and inertial measurement unit(IMU) to show the superiority of IMU in analyzing the human movement. All papers were searched by SciVerse, world largest search engine and database about many academic fields including engineering and medicine. Results: Some physical quantities of human motions can be useful to the diagnosis of MSIS, and those data can be obtained by the MEMS-IMU without the weak points of the conventional motion analysis systems. Conclusions: Using MEMS-IMU as a measurement unit for diagnosing and evaluating MSIS is feasible and can be extended to many further studies.

• 예술경영연구
• /
• 제55호
• /
• pp.155-184
• /
• 2020

본 논문은 여성독립운동의 역사를 다루는 전시가 예술작품을 매개로 주제에 접근하고자 하는 방식을 정신분석학적 페미니즘 관점에서 이론적으로 검증하고, 전시기획 단계에서 의도했던 주제가 최종적으로 작품과 전시 전반에 걸쳐 설득적으로 구현되었는가를 살펴보는 것을 그 목적으로 한다. 이를 위해 뤼스 이리가레이와 줄리아 크리스테바의 이론을 중심으로 작품과 전시를 해석함으로써 전시의 공과를 밝히고자한다. 그리고 여성독립운동이라는 주제에 대한 보다 더 근원적인 접근을 위해서는 기존 독립운동 전시 방식과 같은 남성적 언어가 아닌 여성 고유의 주체성을 담아낼 수 있는 여성적 언어에 대한 모색이 필요함을 주장하고 그러한 여성적 언어를 찾는 방법으로 여성적 말하기, 예술과 시적 언어, 모성의 계보학과 여성들의 연대를 제시하고 그에 관한 이론을 바탕으로 전시내용을 분석하였다. 역사를 다루는 전시에서 예술작품이 어떠한 역할을 할 수 있는가를 실제 전시 사례에 대한 이론적 검증을 통해 밝히고 있는 이 논문은 이론과 현장 간의 소통으로서의 의의를 갖는다.