• Journal of Information Processing Systems
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• 제19권3호
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• pp.323-333
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• 2023

Facial expression recognition can aid in the development of fatigue driving detection, teaching quality evaluation, and other fields. In this study, a facial expression recognition method was proposed with a residual masking reconstruction network as its backbone to achieve more efficient expression recognition and classification. The residual layer was used to acquire and capture the information features of the input image, and the masking layer was used for the weight coefficients corresponding to different information features to achieve accurate and effective image analysis for images of different sizes. To further improve the performance of expression analysis, the loss function of the model is optimized from two aspects, feature dimension and data dimension, to enhance the accurate mapping relationship between facial features and emotional labels. The simulation results show that the ROC of the proposed method was maintained above 0.9995, which can accurately distinguish different expressions. The precision was 75.98%, indicating excellent performance of the facial expression recognition model.

• Design & Manufacturing
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• 제2권1호
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• pp.11-14
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• 2008

we can save a development cost and time as computer was used in tool and die design of car fields in die manufacture process. Dimension accuracy errors such as springback, springgo, overcrown and twist were reduced product accuracy and caused trouble to assembly each parts of car. In this paper, CADCEUS was used to modify and optimize results of deflection for a tail gate panel of car parts in order to reduce dimension accuracy errors by springback in sheet metal forming. As CADCEUS was used to apply for a tail gate panel, the time for quality to improve was reduced to 30%.

• Journal of Preventive Medicine and Public Health
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• 제38권1호
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• pp.61-70
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• 2005

Objectives : To develop a tool for multidimensional measurement of the quality of life, which was psychometrically sound, short, and easy to administer for patients with hypertension. Methods : A sample of 1,115 hypertensive patients aged 20 or above in Cheong-Song County was studied from June 1997 to October 1998. In the development of the instrumental stage, the authors first conceptualized the quality of life. Item generation, item reduction, and questionnaire formatting were followed. Item-level (item descriptive, missing%, item internal consistency, item discriminant validity) analysis, scale-level (scale descriptive, floor and ceiling effect) analysis, and other tests(Cronbach's alpha, inter-dimension correlations, factor analysis, clinical validity) were performed to evaluate the validity and reliability of the new measurement scale. After 1 year, responsiveness and confirmatory factor analysis were performed. Results : The results of both item-level and scale-level analyses were acceptable. An acceptable degree of internal consistency was observed for each of the dimensions (Cronbach's alpha was 0.60 or higher). Inter-dimension correlations were below 0.50 and the factor analysis result was the same as the intended dimension structure. Correlation coefficients between perceived health status, stress and dimensions were proven to be acceptable. The result of comparing dimensional score means among ADL and MMSE-K groups above 60 years was statistically significant(p<0.05). The result of confirmatory factor analysis concluded that the dimensional structure model was well fitted. However, the result of responsiveness test using sensitivity and specificity was unsatisfactory. Conclusions : The newly developed measurement scale is psychometrically reliable and valid instrument for measuring quality of life in hypertensive patients.

• 한국정밀공학회지
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• 제15권6호
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• pp.33-39
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• 1998

This paper is related to economic design of tool-resetting period in NC machining. In NC lathe machining, the mean and variance of components dimension fluctuate in slow time and we should reset tool program to compensate the variation from the fluctuation. In this paper. we propose the procedure determining the optimal resetting period based on the total expected operating cost which consists of resetting cost and the quality cost related to dimension variation. As a case study, using experimental data about dimension changes of a lathe machining, we obtain the regression equations of mean and variance of the dimension fluctuation, total expected operating cost, and optimal resetting period.

• 한국전기전자재료학회논문지
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• 제16권6호
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• pp.515-521
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• 2003

There are now many theoretical investigations and real manufactures for numerous applications of photonic crystals (PCs) associated with photonic band gap and photonic integrated circuits. However, there are some difficulties to design and fabricate the desired pattern quality. It is not easy to satisfy accurate critical dimension (CD) for patterns with arbitrary shapes and pitch sizes aligned in various directions. In this work, we report the optimum conditions to better fabricate and design, and greatly improve pattern quality in delineating two-dimensional (2D) PCs in the nanometer range using single- step e-beam lithography system with conventional exposure mode.

• 암석학회지
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• 제24권3호
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• pp.233-252
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• 2015

이번 연구에서는 체계적이며, 과학적인 탐사방법을 사용하여, 암체별로 석재대상 암반의 열극 측정과 해석으로 그 발달방향, 블록의 예상크기 및 규격석의 산출을 예측하는 방법을 제시하고자 하였다. 시추탐사에서 얻어진 시추공에 대한 텔레뷰어 탐사는 시추 코아 자료에서는 획득하기가 어려운 각종 불연속면(단층, 절리 및 균열 등)의 정확한 경사방향, 경사각 및 연장 상태에 대한 정보를 정확하게 구현할 수 있으며, 이들을 종합하여 삼차원적인 절리의 발달 상태를 예측할 수 있다. 또한 절리 연장상태가 고려된 절리구조 3차원 입체 영상에서는 석산 내 어느 지역에 절리 분포 상황을 전체적으로 파악할 수 있기 때문에 석산 개발 계획 수립을 위해 바람직한 자료가 될 것으로 판단된다. 이 연구에서는 거창지역의 석산을 대상으로 지하 심부의 절리의 연장상태를 예측하는 방법을 이용하여 석재암반에 대한 정량적인 해석을 수행하였으며, 매장량을 산출하는데 있어서 필요한 여러 요소들을 적용하여 적정한 가채물량을 추정하였다.

• 성인간호학회지
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• 제12권4호
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• pp.741-757
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• 2000

This study was undertaken to develop an instrument to be used for measuring the concept of quality of life of Korean patients with cancer multidimensionary and correctly. It can contribute in holistic nursing care for Korean cancer patients and also provide and validate basic data to help oncology nurses measure the outcome of nursing intervention correctly. To develop this instrument, the researchers first estabilished a conceptual framework based on the results of qualitative data analysis and indepth interview method Development of the scale was conducted using a method in which 31 items were assessed by subjects' self report using linear analogue scales. The subjects were 79 D.M. patients, 103 patients with acute illness, and 91 cancer patients residing in Busan, Korea. Data were collected during the period from July, 24 to August 14, 2000. This instrument consisted of 31 items with a self report scale. This instrument covered 4 dimensions of cancer patients : 1) physical wellbeing 2) psychological wellbeing 3) social wellbeing and 4)spiritual wellbeing. Each item had a possible score of 10. The reliability of the scale was tested with Cronbach's alpha. Validity was evaluated by examining the relationships of this scale, Youn's Quality of Life Questionnare scores and the Simple Quality of Life scale. Two separate runs of multiple regression were used to predict scores on the Simple Quality of Life measurement. Further validation was obtained by examining the correlation between the instrument subscores and Youn's Quality of Life measurement subscore for convergence of this scale. Examination of the discriminant. power of the instrument was done using ANOVA test. The results are summarized as follows: 1. The reliability of the instrument for the quality of life was 0.8321(Cronbach's alpha.), physical wellbeing dimension 0.6343, psychological wellbeing dimension 0.6501, spiritual wellbeing dimension 0.5883. 2. This instrument had a high correlation with Youn's Quality of Life measurement(r= 0.636) in cancer patients, whereas it had a low correlation with Simple Quality of Life measurement(r=0.455) in cancer patients. In the D.M. patients, the instrument correlated with both the Youn's Quality of Life measurement and Simple Quality of life measurement(r=0.313, r= 0.407) and in the acute stage patients, the instrument had no correlation. 3. Multiple regression of individual items on the Simple Quality of Life scores accounted for 56.8% of the variance in the Simple Quality of Life measurement, whereas, Youn's Quality of Life measurement scores accounts for 31.7%. 4. The correlations collected from the three group had the same patterns of variations but especially the instrument developed in this study had higher disciminant power than that of Youn's Quality of Life Measurement.

• 국제지역연구
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• 제15권2호
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• pp.199-223
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• 2011

중국경제의 비약적인 발전과 내수시장의 성장으로 유통업체들의 중국진출이 가속화되면서 중국 시장과 소비자에 대한 정확한 이해가 필요한 시점이다. 이에 본 연구는 한국과 중국 소비자들의 할인점 서비스품질에 대한 인식과 몰입차원의 중요성, 그리고 관계성과 변수인 구전의도와 관계유지의도 간의 관련성에 대해 차이점을 비교 연구하였다. 연구모형에 제시된 가설들을 검증하기위해 LISREL을 통한 경로분석을 실시하였으며 가설 검증결과는 다음과 같다. 첫째, 서비스품질 차원이 규범적 몰입에 미치는 영향에 있어, 서비스품질 차원 중 유형성, 신뢰성 및 반응성은 몰입 차원 중 규범적 몰입에 정의 영향을 미치는 것으로 나타났다. 둘째, 서비스품질 차원이 정서적 몰입에 미치는 영향에 있어, 서비스품질 차원 중 유형성을 제외한 신뢰성, 반응성, 확신성 및 공감성은 몰입 차원 중 정서적 몰입에 정의 영향을 미치는 것으로 나타났다. 셋째, 서비스품질 차원이 지속적 몰입에 미치는 영향에 있어, 서비스품질 차원 중 유형성과 신뢰성은 몰입 차원 중 지속적 몰입에 정의 영향을 미치는 것으로 나타났다. 넷째, 몰입 차원 간의 관계에 있어, 정서적 몰입은 규범적 몰입에, 지속적 몰입은 정서적 몰입에 영향을 미치는 것으로 나타났다. 다섯째, 몰입 차원이 구전의도와 관계유지 의도에 미치는 영향을 미치는 것으로 나타났다.

• Journal of Community Nutrition
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• 제8권1호
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• pp.44-57
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• 2006

This study intended to enhance understanding of concept and measurement of service quality and analyzed studies investigating dimension and attributes of service quality in both Korea and international foodservice industries. This study summarized many methodological issues related to service quality measurement, especially SERVQUAL. SERVQUAL has been criticized because performance-expectation difference operationalization threatened reliability and discriminant validity including shared method variance. Researcher suggests that future studies should understand clearly the concept of service quality and methodological issues of SERVQUAL prior to adapting SERVQUAL itself.

• International Journal of Quality Innovation
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• 제4권1호
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• pp.20-39
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• 2003

Based on a combination of theories, experiences and cases a sustainable change strategy and self-assessment method with a focus on the human dimension in TQM are suggested and discussed. The Post Denmark TIQ (Total Involvement in Quality) case will be used to illustrate how breakthrough in people attitudes and organisational culture happened and became the foundation for a new culture focusing on change, continuous improvements and everybody's participation.