• 대한안전경영과학회:학술대회논문집
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• 대한안전경영과학회 2008년도 추계학술대회
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• pp.145-152
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• 2008

Single PPM Quality Innovation Movement is originally developed quality program in Korea for supplier's quality level-up since 1995. The quality target is below the 10ppm(parts per million) in outgoing quality and delivered goods plus field claim. This Single PPM Quality Innovation Movement program was conducted to realize the anticipated results not only due to management result level's increasing, but also the company's confidence and competitiveness. This study attempted to find the mutual influences on the participation of the constituent members, satisfaction of the constituent members and results of the management from Single PPM Quality Innovation Movement. The reliance analysis for the measurement material on the questionnaire was verified by Cronbach's alpha coefficient. Participation of the constituent members, satisfaction of the constituent member and result of the management, the influences upon Single PPM improvement degree level were verified through the structural analysis by using SPSS statistic package. The influence evaluation among the groups was evaluated by the structure equation.

• 수산경영론집
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• 제52권1호
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• pp.23-46
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• 2021

The purpose of this study is to understand the production efficiency of individual fishing communities and provide directions for improvement. The subject of the study is aquaculture type Ochon-Gye in Goheung-gun. The analysis method used bootstrap-DEA to overcome the statistical reliability problem of the traditional DEA analysis technique. In addition, data mining-GIS was applied to identify the spatial productivity of fishing communities. The values of technology efficiency, pure technology efficiency, and scale efficiency were estimated for 32 aquaculture-type fishing villages. Then, using the benchmarking reference set and weights, the projection was presented through adjustment of the input factor excess, and furthermore, the confidence interval of the efficiency values considering statistical significance was estimated using bootstrap.

• 혜화의학회지
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• 제27권1호
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• pp.1-8
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• 2018

Objectives : The purpose of this study was to analyze the status of inpatients in long-term care hospital and the satisfaction of Korean medical treatment. Methods : These analyzed data were collected from patients who were hospitalized in long-term care hospital in Sejong from Jan. 1. 2017 to Dec. 31. 2017. To analyze the status and the satisfaction of inpatients, we calculated the data of inpatients and conducted a survey. Results : Preference for acupuncture treatment was 95.6% and preference for numbers of Korean medical treatment more than two times per week was 40%. In addition, confidence in Korean medical treatment was 4.31, improvement after Korean medical treatment was 4.07 and general satisfaction was 4.58 with five-point scale. Conclusions : Most of the patients in long-term care hospital were satisfied with Korean medical treatment.

• 한국컴퓨터정보학회논문지
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• 제28권11호
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• pp.135-145
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• 2023

학령인구 감소로 지방대학 신입생 중 기초학습 능력이 부족한 학생이 증가하는 추세이다. 따라서 C 전문대학에서 클리닉 프로그램을 진행해 오고 있다. 본 논문은 기초학습 능력향상 클리닉 프로그램이 전공수업에서 자기효능감, 학습 몰입도와 전공수업 만족도에 미치는 영향을 조사한 사례 연구이다. 2022년 기초학습 능력향상 클리닉 대상자에 관한 온라인과 오프라인 수업 형태에 참여 학생 238명과 참여 대상자이지만 수업 미참여 학생 221명 총 459명을 연구대상으로 조사하였다. 자료처리는 SPSS Ver. 26.0을 이용하였다. 본 연구 결과는 다음과 같다. 첫째, 기초학습 능력향상 클리닉 수업 참여그룹은 학업적 자기효능감 하위요인 중 과제 난이도 선호와 자신감에서 유의한 차이를 보였다. 둘째, 수업 참여그룹은 전공수업 학습 몰입도에서 유의한 차이를 나타냈다. 셋째, 수업 참여그룹은 전공 만족도 하위요인 모두에서 유의한 차이를 보였다. 결론적으로 기초학습 능력향상 클리닉 수업이 자기효능감, 학습몰입도, 전공 만족도에 유의미한 것으로 나타났다.

• Physical Therapy Rehabilitation Science
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• 제6권3호
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• pp.146-151
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• 2017

Objective: The purpose of this study was to investigate the effects rhythmic and non-rhythmic aerobic exercises on depression and balance of healthy elderly people. Design: Randomized controled trial. Methods: Nineteen older subjects were randomly divided into 2 groups for rhythmic and non-rhythmic aerobic exercises. Both aerobic exercises consisted of functional movements such as turning in opposite directions, and running in place, the exercise consisted of movements that could activate balance. The rhythmic training group initially used music with 8 beats, and then later progressed to 16 beats. Additionally, we adjusted the pace of the music using songs from 125 beats per minute (bpm) to 160 bpm. Both groups were exercised for 50 minutes a day, twice a week, for a total of 8 weeks. We measured the condition of the patients before the intervention, and after 8 weeks of intervention. The Beck depression inventory (BDI) was used to measure the degree of depression. The Berg balance scale (BBS) was used to measure static and dynamic balance ability. We measured the subject's subjective balance confidence using the fall efficacy scale (FES). Results: Both groups showed significant improvement in BDI, BBS, and FES (p<0.05). The rhythmic aerobic exercise group showed a significant improvement only in the BBS change values compared to the non-rhythmic group (p<0.05). Conclusions: According to this study, both rhythmic and non-rhythmic aerobic exercises resulted in significant improvement in the degree of depression and balance ability of the elderly. The rhythmic aerobic exercise was more effective for dynamic balance ability.

• 한국융합학회논문지
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• 제7권1호
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• pp.197-203
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• 2016

본 연구에서는 AHP 분석의 결과로 도출된 TPM의 스텝활동 중 가장 중요한 활동들과 기업성과와의 관계를 모형으로 구축한다. 그리고 이러한 스텝활동들이 매개변수를 통해 기업성과에 영향을 미치는지를 융합적 관점에서 분석하고자 하였다. 4개의 스텝활동인 현장불합리 및 로스개선, 준비 및 5S 활동 기본조건 체계구축, 초기청소, 설비효율의 로스분석을 독립변수로 선정하고 TPM 활동수준을 매개변수로 하여 종속변수인 기업성과에 어떠한 영향을 미치는가를 분석하였다. 분석결과 4개의 스텝활동들은 기업성과에 직접 효과를 나타내고 있지는 않지만, TPM 활동수준이 매개변수로 투입된 경우에는 기업성과에 영향을 미치는 완전매개효과를 갖는 것으로 나타났다. 즉, TPM 활동수준은 매개변수로서의 역할을 하는 것으로 나타났다. 따라서 TPM에 참여한 사람들의 설비에 대한 자신감, 자기계발의 의식, 개인 업무에 대한 명확한 관리 등에 대한 인식수준이 높을수록 TPM활동은 성공적으로 기업의 성과에 공헌할 수 있는 것으로 해석할 수 있다.

• 한국도로학회논문집
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• 제19권2호
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• pp.153-165
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• 2017

PURPOSES : With the increasing number of older drivers in an aging society, there is a growing need for research and planning on traffic safety for the older drivers using an improved road geometry design. This study also proposed a modified urban road interchange design, which aims to keep the older drivers away from accident-prone and high-traffic areas of the city. METHODS : In this study, we examined accident data records of older drivers to identify accident-prone zones and intersections; we studied the road geometry at these zones and analyzed if it was an underlying cause for higher number of accidents. Based on the research and subsequent analysis, we suggested plans for improvement of road geometry design at these intersections. RESULTS :By studying historic data and analyzing factors that affect the likelihood of accidents of vehicles driven by older drivers and after studying suitable traffic accident prediction models, we identified the major variables that need to be modified at accident-prone intersections, such as the width of a left turn lane at an intersection and the radius of the right turn lane at a street corner. The results have a significance probability of less than 0.001 and a 95% confidence level. To improve safety at the identified intersection, this study suggests the installation of a left-turn-lane-shaped Positive Offset and a right-turn-lane-shaped Slip Lane concept and an adjustment of intervals between intersections.

• 대한안전경영과학회지
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• 제14권3호
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• pp.101-109
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• 2012

It is commonly recognized that railway is one of the representative transportation and it offers public service based on strategies for being rapid, automation, safety. Since the opening of high speed railway, 3-hundred-million people have used it and acknowledged its efficiency. However, derailed accident at Kwangmyeong station in February, 2011, frequent malfunction of KTX-Sancheon, and accidents by engineer's careless fault damaged on credibility of safety, Especially, spreaded accidents through social networking service by cell phones amplified anxiety of public, being criticized by the press. This study analyzed statistics of past accident and cases of passing-by accident, and surveyed 152 KTX captain engineers about their recognition of the accident by careless fault and experiences of possibility of occurrence for preventing engineer's careless fault and restoring trust According to the analysis, engineers worry about responsibility and disadvantages related to the accidents for the most, and they are nervous about malfunction for the second most. This study presents prevention methods regarding the result. First, it is required to improve mental stability and concentration on their work, secondly, advanced ability to cope with malfunction or error through repetitive education and training are required to increase confidence, and for the last, improvement of operational supporting system such as ATP, GPS to prevent errors by human factors. Improvement of the system is expected to lead engineers to prevent careless fault and regain the reputation of railway.

• Smart Structures and Systems
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• 제31권1호
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• pp.57-68
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• 2023

Bridge hangers, such as those in suspension and cable-stayed bridges, suffer from cumulative fatigue damage caused by dynamic loads (e.g., cyclic traffic and wind loads) in their service condition. Thus, the identification of damage to hangers is important in preserving the service life of the bridge structure. This study develops a new method for condition assessment of bridge hangers. The tension force of the bridge and the damages in the element level can be identified using the Bayesian optimization method. To improve the number of observed data, the additional mass method is combined the Bayesian optimization method. Numerical studies are presented to verify the accuracy and efficiency of the proposed method. The influence of different acquisition functions, which include expected improvement (EI), probability-of-improvement (PI), lower confidence bound (LCB), and expected improvement per second (EIPC), on the identification of damage to the bridge hanger is studied. Results show that the errors identified by the EI acquisition function are smaller than those identified by the other acquisition functions. The identification of the damage to the bridge hanger with various types of boundary conditions and different levels of measurement noise are also studied. Results show that both the severity of the damage and the tension force can be identified via the proposed method, thereby verifying the robustness of the proposed method. Compared to the genetic algorithm (GA), particle swarm optimization (PSO), and nonlinear least-square method (NLS), the Bayesian optimization (BO) performs best in identifying the structural damage and tension force.

• 대한토목학회논문집
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• 제34권5호
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• pp.1535-1545
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• 2014

본 연구는 교통 및 도로의 특성을 고려하여 DSRC 교통정보의 신뢰성을 향상시키는 것을 목표로 하고 있다. 먼저, 본 연구에서는 도시고속도로에서의 DSRC 수집 데이터의 특성과 이상치 데이터 발생의 문제점을 분석하였다. 그 다음으로, 이상치 제거의 최적 방안을 적용하여 신뢰성 있는 교통정보를 생성하였다. 이상치를 제거한 후, 정확성 평가와 신뢰수준별 표본수의 적정성 여부에 대해서도 수행하였다. 그 결과, 평균절대오차백분율(MAPE)는 2.2%~9.7%이고, 평균제곱근오차(RSME)는 2.2~7.5로 분석되어, 실제 평균 통행속도와 매우 유사한 값으로 나타났다. 또한, 오전 오후 첨두시간대의 표본수는 신뢰수준 95%, 90%, 허용오차 5kph 범위에서 매우 적정한 것으로 분석되었다.