• Journal of the Korean Statistical Society
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• 제33권4호
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• pp.381-399
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• 2004

Statistical process control (SPC) and engineering process control (EPC) are based on different strategies for process quality improvement. SPC re-duces process variability by detecting and eliminating special causes of process variation, while EPC reduces process variability by adjusting compensatory variables to keep the quality variable close to target. Recently there has been need for an integrated process control (IPC) procedure which combines the two strategies. This paper considers a scheme that simultaneously applies SPC and EPC techniques to reduce the variation of a process. The process model under consideration is an IMA(1,1) model with a step shift. The EPC part of the scheme adjusts the process, while the SPC part of the scheme detects the occurrence of a special cause. For adjusting the process repeated adjustment is applied according to the predicted deviation from target. For detecting special causes the exponentially weighted moving average control chart is applied to the observed deviations. It was assumed that the adjustment under the presence of a special cause may increase the process variability or change the system gain. Reasonable choices of parameters for the IPC procedure are considered in the context of the mean squared deviation as well as the average run length.

• Asian Pacific Journal of Cancer Prevention
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• 제17권8호
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• pp.4095-4099
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• 2016

Background: Use of spiritual/ religious resources is one important coping strategy for breast cancer patients. However, the relationship between spiritual coping and adjustment to cancer diagnosis has not been well investigated among Iranian breast cancer patients. Materials and Methods: This descriptive-correlational study was undertaken among 266 breast cancer patients referred to two educational centers in north-western Iran. They were selected using a convenience sampling method. The Iranian Religious Coping Scale and Iranian Coping Operations Preference Enquiry were used for data collection. The data were analyzed using SPSS version 13.0. Results: The study findings showed that Iranian cancer patients had a high level of spiritual coping. Also, positive religious coping strategies were used more frequently than negative approaches. In addition, there was a positive and significant correlation between spiritual coping and adjustment to cancer among study participants. Conclusions: Using spiritual coping strategies may play a vital role in adjustment process in patients with breast cancer. Therefore, having spiritual counseling and incorporating coping strategies into the treatment regimen may be effective for enhancing illness adjustment in such patients.

• 한국보육지원학회지
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• 제17권5호
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• pp.43-61
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• 2021

Objective: This study aimed to examine the sequential mediating effects of children's perceived maternal acceptance and peer acceptance in the relationship between maternal warmth and first grade children's school adjustment. Methods: Participants in this study were 979 seven-year-old children(498 boys, 481 girls) recruited for the Korea Child Panel Study. Data were analyzed by analyzing descriptive statistics, correlations, and significance of serial mediation pathways using SPSS 18.0 and PROCESS Macro 3.4. Results: Maternal warmth at age five effected perception of maternal acceptance at age six. Perceived maternal acceptance at age six effected perceived peer acceptance at age six. Perceived peer acceptance at age six effected school adjustment at age seven. Lastly, perceived maternal acceptance and peer acceptance at age six had a serial mediation effect between maternal warmth at age five and school adjustment at age seven. Conclusion/Implications: Perceived social acceptance during preschool years should be emphasized in order to promote school adjustment for first grade children. Parent education for promoting better parent child relationships should be considered and teachers should encourage peer play interaction to help children perceive acceptance from their peers.

• 한국융합학회논문지
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• 제9권4호
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• pp.433-442
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• 2018

본 연구는 G시에 소재한 보건계열 대학생 220명을 대상으로 인성, 대인관계가 대학생활 적응에 미치는 영향 요인을 조사하였다. 조사는 2017년 8월 1일부터 12월 30일까지 설문조사가 시행되었으며, 연구결과 대학생의 인성수준은 평균 3.49점(1-5점), 대인관계는 평균 3.40점(1-5점), 대학생활 적응은 평균 3.33점(1-5점)으로 중간수준이었다. 인성, 대인관계, 대학생활 적응간의 관계는 대학생활 적응과 인성(r=.62, p<.001), 대학생활 적응과 대인관계(r=.80, p<.001), 전공만족과 대학생활 적응(r=-r=-.32, p<.001)은 통계적으로 유의한 중정도수준을 보였다. 보건계열 대학생의 대인관계가 좋을수록, 인성의 행동영역 수준이 높을수록, 대학생활 적응을 잘하는 것으로 나타났다 65%(F=102.97). 보건계열 대학생의 대학생활 적응을 향상시키기 위해서 대학 교육과정 내의 인성교육을 향상시킬 수 있는 표본화된 프로그램이 필요하다고 사료된다.

• 한국컴퓨터정보학회논문지
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• 제24권7호
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• pp.161-168
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• 2019

The purpose of this study is to analyze the mediating effects of anger level on the effects of middle school students' school adjustment on smartphone addiction. In order to accomplish the purpose of this study, the following research problems were set up. First, what is the relationship between Chinese smartphone addiction, anger level, and school adjustment of Chinese middle school students? Second, what is the effect of smartphone addiction on middle school students' anger level and school adjustment? Third, what is the mediating effect of the level of anger in the process of affecting the school adjustment to smartphone addiction by Chinese middle school students? The subjects of this study were five city schools and seven municipal schools in J-do, among which 450 students were enrolled from April 23 to May 18, 2018. A total of 439 copies were used for the analysis, except for 11 unexplained questionnaires or unfairly responded to the collected questionnaires. The conclusions based on the results of this study are as follows. First, there are negative correlations between the sub-factors of smartphone addiction and the sub-factors of school adjustment. Among them, tolerance is only positively correlated with the peer relationship. The sub-factors of smartphone addiction have negatively correlated with anger expression, anger control, and anger suppression. Second, the effect of sub-factors of smartphone addiction on the level of anger was 3.6%, and the effect on school adjustment was 4.2%. Third, The anger level of the middle school students affected the school adjustment by the smartphone addiction has a partial mediating effect of 0.8%.

• 가족자원경영과 정책
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• 제17권2호
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• pp.121-145
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• 2013

The purpose of this study is to understand married female immigrants' life adjustment process in Korea by explaining the resources to which they have access and how they use them. The data were collected through in-depth interviews with ten female participants who have more than one child, have participated in programs of the multicultural family support center, have work experience, can communicate with Koreans, and live in Daegu. The major findings are as follows. The participants' personal resources differed. English language skills were very useful resources for making money and for earning the respect of family members and others. However, the participants without English language skills had sincerely and actively tried to learn the Korean language and gain bilingual competence. The participants obtained diverse family resources from their husbands and parents-in-law after adapting themselves to perform their gender role. Further, the participants used the social resources offered by public support systems as a starting point for learning the Korean language in their early adaptation process, and formed personal networks with staff members at the multicultural family support center. The results show that the participants used many kinds of resources for acculturation by interacting positively with their environment. Moreover, the resources from diverse levels of their environments affected their acculturation process.

• Communications for Statistical Applications and Methods
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• 제22권5호
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• pp.519-530
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• 2015

The geometric chart has proven more effective than Shewhart p or np charts to monitor the proportion nonconforming in high-quality processes. Implementing a geometric chart commonly requires the assumption that the in-control proportion nonconforming is known or accurately estimated. However, accurate parameter estimation is very difficult and may require a larger sample size than that available in practice in high-quality process where the proportion of nonconforming items is very small. Thus, the error in the parameter estimation increases and may lead to deterioration in the performance of the control chart if a sample size is inadequate. We suggest adjusting the control limits in order to improve the performance when a sample size is insufficient to estimate the parameter. We propose a linear function for the adjustment constant, which is a function of the sample size, the number of nonconforming items in a sample, and the false alarm rate. We also compare the performance of the geometric charts without and with adjustment using the expected value of the average run length (ARL) and the standard deviation of the ARL (SDARL).

• 한국산업정보학회논문지
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• 제7권4호
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• pp.53-58
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• 2002

이 논문에서 개별 관측치를 이용한 Shewhart 관리도와 CRL 관리도로 이루어지는 수정된 합성 관리도를 구성한다. Shewhart X 관리도를 적용하여 관리한계선을 벗어나지 않으면 CRL 관리도를 적용하여 한 번 더 공정의 이상유무를 판단하는 2중 감지 공정관리기법을 고려한다. 합성 관리도에서 공정변화를 지적하는 감지력으로 평균 런의 길이()를 이용한다. 논문에서 제안된 수정된 합성 관리도는 We와 Spedding(2000a)이 제안한 합성 관리도와 Shewhart X 관리도보다 우수하며, EWM 관리도와는 성능면에서 매우 유사하다. 또한 공정변화가 0.75$\sigma$보다 클 때는 수정된 합성 관리도가 우수하다는 것을 확인할수 있다. 제시된 X-CRL 관리도를 평가하기 위해 조건부 확률을 계산하여 기존의 관리도와 비교한다.

• 한국CDE학회논문집
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• 제6권4호
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• pp.263-270
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• 2001

In stamping-die manufacturing, the first step is to build die patterns for lost wax casting process. A recent industry trend is to manufacture the die pattern using 3-axis NC machining. This study identifies technical considerations of the pattern machining caused by the characteristics of Styrofoam material, and proposes technical methods related to establishing a process plan and generating tool paths for optimizing the pattern machining. In this paper, the process plan includes the fellowing three items: 1) deter-mining a global machining sequence-a sequence of profile, top, bottom machining and two set-ups, 2) extracting machining features from a pattern model and merging them, and 3) determining a machining sequence of machining features. To each machining feature, this study determines the machining start point, generates the approach tool path, and proposes a tool path linking method fur reducing the distance of the cutter rapid motion. Finally, a smooth tool path generation and an automatic feedrate adjustment (AFA) method are introduced far raising the machining efficiency.

• 대한원격탐사학회:학술대회논문집
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• 대한원격탐사학회 2003년도 Proceedings of ACRS 2003 ISRS
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• pp.888-890
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• 2003

The objective of this investigation is to establish a simple yet effective block adjustment procedure for the orthorectification of multi-orbit satellite images. The major works of the proposed scheme are: (1) adjustment of satellite‘s orbit accurately, (2) calculation of the error vectors for each tie point using digital terrain model and ray tracing technique, (3) refining the orbit using the Least Squares Filtering technique and (4) generation of the orthophotos. In the process of least squares filtering, we use the residual vectors on ground control points and tie points to collocate the orbit. In orthorectification, we use the indirect method to generate the orthoimage. Test areas cover northern Taiwan. Test images are from SPOT 5 satellite. Experimental results indicate that proposed method improves the relative accuracy significantly.