• International Journal of Automotive Technology
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• 제6권4호
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• pp.367-374
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• 2005

This paper proposes a sound quality index to evaluate the vehicle interior noise. The index was developed using a correlation analysis of an objective measurement and a subjective evaluation data. First, the objective set of measurements was obtained at two specified driving conditions. One is from a wide-open test condition and the other is from a constant-speed test condition. At the same time, subjective evaluation was carried out using a score of ten scale where 17 test engineers participated in the experiment. The correlation analysis between the psycho-acoustic parameters derived from the objective measurement and the subjective evaluation was performed. The most critical factors at both test conditions were determined, and the corresponding equations for the sound quality were obtained from the multiple factor regression method. Finally, a comparative work between previous index and present index was performed to validate the effectiveness of the proposed index.

• International Journal of Automotive Technology
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• 제7권7호
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• pp.821-826
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• 2006

This paper describes a rollover index (RI)-based rollover mitigation control (RMC) system. A rollover index which indicates an impending rollover has been developed by a roll dynamics phase plane analysis. The rollover index is calculated using the roll angle, the roll rate, the lateral acceleration and time to wheel lift (TTWL). A differential braking control law based on a 2-D bicycle model has been designed using the direct yaw control (DYC) method. An RMC threshold has been determined from the rollover index. The performance of the RMC scheme and the effectiveness of the proposed rollover index are illustrated using a vehicle simulator.

• International Journal of Fuzzy Logic and Intelligent Systems
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• 제10권4호
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• pp.308-313
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• 2010

This paper presents a performance index-based evaluation for a better quadruped robotic walking configuration. For this purpose, we propose a balance-based performance index that enables to evaluate the walk configuration of quadruped robots in terms of balance. In order to show the effectiveness the proposed performance index, we consider some types of walking configurations for a quadruped robotic walking and analyze the trend of the proposed performance index in those quadrupedal walking. Through the simulation study, it is shown that an effective walk configuration for a quadrupedal walking can be planned by adopting the proposed performance index.

• 한국수자원학회논문집
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• 제46권10호
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• pp.1017-1028
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• 2013

본 연구의 목적은 물이용, 홍수 및 하천환경의 3개 수자원 정책 부문에서 수행한 사업성과를 지역별로 평가할 수 있는 통합수자원평가지수(Integrated Water Resources Evaluation Index, IWREI)를 개발하는 것이다. IWREI는 각 부문별 취약성을 나타내는 물이용취약지수(Water Use Vulnerability Index, WUVI), 홍수취약성지수(Flood Vulnerability Index, FVI), 하천환경취약지수(River Environment Vulnerability Index, REVI)를 통합하여 산정된다. 이들 지수들은 물이용, 홍수, 하천환경의 피해를 주는 압력지표(pressure indicators)와 이에 의한 피해 현상지표(state indicators) 및 피해의 대책지표(response indicators)에서 선정한 총 26개 지표로 구성된다, 산정된 지수는 Low, Medium Low, Medium, Medium High, 및 High의 5단계로 취약성 및 정책수행의 효과를 나타냈다. 우리나라 115개의 중권역에 대해 WUVI, FVI, REVI 및IWREI을 분석한 결과, 1990년대 초반에 비해 2000년대 초반의 지수가 개선되어 수자원 정책의 사업효과를 확인할 수 있다. 본 연구에서 개발된 지역간수자원의 취약지수와 평가지수는 수자원 정책목표의 설정과 사업이행의 우선지역을 선정하는데 이용할 수 있다.

• 한국생산제조학회지
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• 제19권4호
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• pp.570-575
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• 2010

This study is regarding development of an index table for antomation of welding process in impeller fabrication. A PLC, which is widely used for automation in industry, was also adopted as a controller for the index table because of it effectiveness, easy maintenance and repair. The index table consists of centering jig, blade jig, workbench, driving system and a controller. A touch screen was also prepaired as a man-machine interface to provide convenience for workers. Water jacket was installed inside the workbench to reduce thermal stress come from the welding. Temperature of the water jacket was kept constant to cool an impeller main plate effectively. The index table developed in this study convinces that it reduces the total welding time by 50% compared with the conventional process without the table.

• 한국지반공학회:학술대회논문집
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• 한국지반공학회 2002년도 봄 학술발표회 논문집
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• pp.49-54
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• 2002

This paper describes a systematic way of simultaneously identifying the ambient pore pressure and the rigidity index (=G/s$\_$u/) of soil by applying an optimization technique to the piezocone dissipation test result. An ambient pore pressure and optimal rigidity index were determined by minimizing the differences between theoretical excess pore pressures developed by Randolph ＆ Wroth(1979) and measured excess pore pressures from piezocone using optimization technique. The effectiveness of the proposed back-analysis method was examined against the well-documented performance of piezocone dissipation tests (Tanaka ＆ Sakagami, 1989), from the viewpoints of proper determination of selected target parameters and saving of test duration. It is shown that the proposed back-analysis method can evaluate properly the ambient pore pressure and the rigidity index by using only the early phase of the dissipation test data. Also, it is shown that with the optimized rigidity index and ambient pore pressure the proposed back-analysis method permits the horizontal coefficient of consolidation to be identified rationally.

• 대한소아치과학회지
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• 제47권2호
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• pp.109-119
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• 2020

이 후향적 연구는 chloral hydrate, hydroxyzine 및 N₂O/O₂ 조합을 이용한 진정 치료를 시행한 149명 환아의 188회 진정 치료의 효과와 부작용에 대해 알아보고, 효과와 부작용에 영향을 미칠 수 있는 요소를 확인하고자 하였다. 진정 치료의 효과는 Houpt 분류법을 이용하여 측정하였고, excellent와 good의 경우 효과적으로 분류하였다. 진정 치료 시간을 15분 간격으로 나누어 효과와 부작용을 분석한 결과, 치료 시간이 증가할수록 효과는 감소하고 부작용은 증가하는 것으로 나타났다. 60분 동안의 진정 치료 효과는 57.4% 이었으며, 전체 부작용 발생률은 18.1%이었다. 진정 치료의 효과는 Body mass index(BMI)가 증가할수록 증가하였으며, 술식 시작 시 진정이 되어있는 경우 진정 치료 효과가 높은 것으로 나타났다. 부작용은 나이가 증가할수록 증가하였다. 진정 치료가 2회로 나누어 시행되었을 때, 진정 치료의 횟수는 효과와 부작용에 영향을 미치지 않았다. 진정 치료 시간을 무리하게 연장하는 것은 효과 감소와 부작용 증가를 불러일으킬 수 있으므로 진정 치료를 2회에 나누어 시행하는 것이 필요할 것으로 생각된다. 또한 BMI, 술식 시작 시 진정 여부 및 나이와 같은 진정 효과를 감소시키고 부작용을 증가시키는 요소에 대한 충분한 고려가 선행된 후 진정 치료를 시행하여야 할 것으로 생각된다.

• 한국군사과학기술학회지
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• 제15권5호
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• pp.643-650
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• 2012

This paper presents quantitative method of static combat effectiveness to classify fighter aircraft generations. We have analyzed performance metrics of United States(US), United Kingdom(UK), Russia, France, Sweden' fighters to determine jet-fighter generation. Both nominal and continuous variables were defined and used to present current trend of combat effectiveness.

• The Journal of Korean Physical Therapy
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• 제30권5호
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• pp.193-198
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• 2018

Purpose: The purpose of this study was to analysis of effectiveness between cognitive function assessment scores and gaming cognitive rehabilitation system in children with intellectual impairment. Methods: Five children (male=5, $age=10.00{\pm}0.80$) with intellectual impairment participated in this study and were randomly assigned to the experiment that played (received) gaming cognitive rehabilitation system (Neuroworld). The children were applied 2 times a week for 30 minutes during 3 months. The children were assessed K-WSIC-VI (Korean-Wechsler intelligence scale for children-fourth edition) and recorded that gained score in gaming cognitive rehabilitation system before and after intervention. K-WSIC-VI contained five primary index scores: verbal comprehension index, visual spatial index, fluid reasoning index, working memory index, and processing speed index. Gaming cognitive rehabilitation system scoring was composed visual recall, target recall, sequence recall, selective attention, continuous attention, and exploration. Results: In the intelligence quotient (IQ) of K-WSIC-VI, there were significant increased in all children. The visual recall item was highest effective in all children. However, sequential recall showed the lowest improvement in all children. The performance speed of selective attention item was decreased, this means that children's skills have improved. Also, their ability to explore has improved significantly. Conclusion: In conclusion, gaming cognitive rehabilitation system was significant effectiveness in cognitive function in some categories for children with intellectual impairment. However, the visual recall and performance speed don't represent of all cognitive function. Therefore, further studies will need to verify by applying more subject and longer duration.

• 한국산림과학회지
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• 제105권3호
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• pp.377-390
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• 2016

본 논문은 산림부문을 대상으로 국내 적용 가능한 생태계서비스지불제 유형 및 구성요소를 설계하고 지불제 이행을 위한 지수체계를 개발하는 한편 사례분석을 통하여 지수체계의 적용 가능성을 검토하였다. 지수체계는 3개의 지표그룹 즉, 생태계서비스 공급량 현황, 산림관리계획 수립으로 인해 예상되는 생태계서비스 개선정도, 프로그램 이행을 위한 실질비용 측정을 위한 지표그룹으로 구성하였다. 사례분석 결과 생태계서비스 공급량에 있어 동일한 측정값을 나타낼지라도 관리요소 및 실질비용 시나리오에 따라 생태계서비스 종합점수는 최저 301점에서 최고 501점까지(충북 괴산군 사례지역 1의 경우) 또는 최저 273점에서 최고 460점(강원 평창군 사례지역 2의 경우)까지 차별화되는 것으로 나타났다. 이는 토지소유자가 어떤 수준의 관리계획과 모니터링을 선택했는지에 따라 단위비용당 종합점수로 표현되는 비용효과성이 다양하게 나타날 수 있음을 예시하는 결과로서, 지불제 이행 시 생태계서비스 점수만을 고려할 경우와 비용효과성 측면을 동시에 고려할 경우 상이한 결론 도출이 가능하다는 것을 시사하고 있다.