• Title/Summary/Keyword: reliability factors

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A Study on the Factors affecting the Recovery Satisfaction at Logistics Service Failure (물류서비스실패시 회복만족에 영향을 미치는 요인에 관한 연구)

  • Choi, Youngro
    • Journal of Korea Port Economic Association
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    • v.28 no.4
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    • pp.169-191
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    • 2012
  • This study is to investigate the strategy on forming a long term relationship between logistics service provider and demander including maintaining strategy of it. For these purposes, effect on the organization and human factor of Logistics service companies and also, impact on the customer trust and relational commitment against service recovery are analysed. Literature review and empirical study are used to modify research model and to develop questionnaire for logistics service companies. Reliability for measuring procedure yields the same result on repeated trials and validity for identifying the accuracy of the accrual measuring instrument are also used. Suggested hypothesis are verified through multiple regression method and the testing results are shown as follows; First, organization and human factor have a positive effect to the service recovery satisfaction against the service failure of logistics service providing company. Second, the service recovery satisfaction also leads a positive effect on the customer trust and relational commitment.

Element Correction Method of Thermoluminescent Dosimeters (개인 피폭선량계 소자 보정법)

  • 송명재
    • Progress in Medical Physics
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    • v.2 no.1
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    • pp.17-28
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    • 1991
  • Generally, it is an accurate radiation measurement technique for processors fo thermoluminescent dosimenters(TLDs) to characterize each element they use by producing element correction factors(FCFs). TLDs are classified into three groups such as reference. control, and field TLDs. Reference TLDs are used only for the production of ECFs for the control and field TLDs. They are kept locked in a safe place except when it is necessary to use a subset of them to produce ECFs for the control and field TLDs. The ECF of a given element is a measure of the response of the element relative to the mean response of an arbitrarily selected group of reference elements. As TLDs are used in the field, their relative responses to radiation might be decreased due to muliple readings and physical abuse. Therefore, the producditon of ECFs are performed initially and periodically during the field use. This element correction method provides an excellent tool to examine new TLDs and to monitor the reliability of old TLDs. This paper discuss the 10 step procedures developed to produce and examine ECFs.

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A Study of Quality-based Software Architecture Design Model under Web Application Development Environment (품질기반 웹 애플리케이션 개발을 위한 소프트웨어아키텍쳐 설계절차 예제 정립)

  • Moon, Song Chul;Noh, Si Choon
    • Convergence Security Journal
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    • v.12 no.4
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    • pp.115-122
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    • 2012
  • As the most common application development of software development time, error-free quality, adaptability to frequent maintenance, such as the need for large and complex software challenges have been raised. When developing web applications to respond to software reusability, reliability, scalability, simplicity, these quality issues do not take into account such aspects traditionally. In this situation, the traditional development methodology to solve the same quality because it has limited development of new methodologies is needed. Quality of applications the application logic, data, and architecture in the entire area as a separate methodology can achieve your goals if you do not respond. In this study secure coding, the big issue, web application factors to deal with security vulnerabilities, web application architecture, design procedure is proposed. This proposal is based on a series of ISO/IEC9000, a web application architecture design process.

Development of Security Functional Requirements for Secure-Introduction of Unmanned Aerial Vehicle (무인항공기의 안전한 도입을 위한 보안기능요구사항 개발)

  • Kang, Dongwoo;Won, Dongho;Lee, Youngsook
    • Convergence Security Journal
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    • v.19 no.4
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    • pp.97-105
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    • 2019
  • With the possibility of wireless control of the aircraft by Nicola Tesla, Unmanned Aerial Vehicle(UAV) was mainly used for military and defense purposes with the rapid development through World War I and II. As civilian applications of unmanned aerial vehicles have expanded, they have been used with various services, and attempts have been made to control various environmental changes and risk factors of unmanned aerial vehicles. However, GPS spoofing, Jamming attack and security accidents are occurring due to the communication in the unmaned aerial vehicle system or the security vulnerability of the unmanned aerial vehicle itself. In order to secure introduction of Unmanned aerial vehicle, South Korea has established Unmanned Aerial Vehicle verification system called Airworthiness Certification. However, the existing cerfication system is more focused on test flight, design and structure's safety and reliability. In this paper, we propose a unmanned aerial vehicle system model and propose security functional requirements on unmanned aerial vehicle system in the corresponding system model for secure-introduction of Unmanned Aerial Vehicle. We suggest the development direction of verification technology. From this proposal, future development directions of evaluation and verification technology of Unmanned Aerial Vehicle will be presented.

The Effects of Customers' Preference Variables on the Level of Satisfaction with the Menu at Rice Cake Cafe (떡 카페 메뉴에 대한 고객선호도 요인이 메뉴 만족에 미치는 영향에 관한 연구)

  • Jeon, Hyu-Jin;Han, Myung-Jin;Park, Gye-Young
    • Culinary science and hospitality research
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    • v.12 no.3 s.30
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    • pp.1-16
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    • 2006
  • This study investigates the level of customers' preferences for the menu at rice cake cafes. The study aims at examining the potential of restaurants with rice cake dishes and suggesting the ways to contribute to the potential. For this study, various rice cake cafes in Seoul which were often mentioned in the Internet portal sites and mass media are selected such as Jilsilu, Midan, Yaemunbyeonggwa, and Howeondang. Some of the customers in these rice cake cafes from August 16th to 26th in 2005 are the participants in this study. Using Windows SPSS 11.0 for statistical analysis, the validity of the items in the questionnaire is tested through Cronbach's Alpha which also reveals the internal reliability. Variables are analysed to eliminate less important variables. In order to examine the differences between groups by norm population profiles, t-test and ANOVA are conducted. For obtaining the degree of impact of rice cake cafe preference variables on the satisfaction in the rice cake cafe, regression analysis is carried out. As a result, for preferences for dishes, 19 variables among 22 are identified and divided into four factors which are named as 1) fundamental factor, 2) external factor, 3) appearance factor, and 4) structural factor. The fundamental factor, external factor, appearance factor, and structural factor are all significantly influential to the level of satisfaction with the menu, yet the fundamental factor is the most powerful factor among them.

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A Study on the Effect of China Consumer's Restaurant Selection Attributes, Customer Satisfaction and Customer Loyalty - Focusing on Korea and China Restaurants in China - (중국 내 외식 소비자의 외식업체 선택 속성이 고객 만족과 고객 충성도에 미치는 영향에 관한 연구 - 한식당과 자국 식당 간의 비교 분석을 중심으로 -)

  • Moon, Sung-Sik;Kang, Byung-Nam;Jeon, Jeong-Won
    • Culinary science and hospitality research
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    • v.16 no.5
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    • pp.79-91
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    • 2010
  • The purpose of this study is to investigate selection attributes of Korea and China restaurants in China. By a convenience sampling method, total 479(245 China restaurants and 234 Korea restaurants) useable data were selected. Multiple statistical methods(factor analysis, reliability analysis, T-test, multiple regression) were used to analyze the data. The results are as follows: First, restaurant satisfaction is affected by selection restaurant attribute factors. Second, restaurant satisfaction bas a significant impact on customer loyalty. Third, Korea and China restaurants have differences in customer satisfaction. Fourth, Korea and China restaurants have differences in customer loyalty.

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A Study on Variation Control in Building Construction Process (건축공사 공정중심의 변이관리에 관한 연구)

  • Oh Sang-Jun;Suh Sang-Wook
    • Korean Journal of Construction Engineering and Management
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    • v.2 no.4 s.8
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    • pp.117-126
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    • 2001
  • The purpose of this study is to present a way of Variation Control in building construction process. The study suggest a way of the application method of shielding, decoupling concept and also Poka-yoke device to control variation that occurs from uncertainty in construction industry with lots of waste factors. The main contents of the study are as follows; (1) It's suggested strategy to apply shielding, decoupling as variation control technique. (2) Current Poka-yoke devices are investigated and analyzed. As a future research, it is required to study continuously on the more effective application method of Poka-yoke device and on existing examples in domestic construction sites for the process improvement.

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Remote Communication of sensor data in Ballast Water Treatment System (선박 평형수 처리 시스템에서 센서 데이터의 원격 통신)

  • Kim, Chin-Hoon;Kim, Joo-Man;Kim, Byoung-Chul
    • The Journal of the Institute of Internet, Broadcasting and Communication
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    • v.14 no.6
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    • pp.139-147
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    • 2014
  • The ballast water may be discharged into another sea area with marine organisms, it caused problems to disturb the marine ecosystem. So, in order to remove these environmental risk factors, the IMO has mandated the installation of BWTS to the all ships. Our monitoring system diagnose and predict a failure of BWTS by analyzing the sensor information of BWTS collected from which the ships scattered in the ocean of several. This paper presents the design and implementation of communication modules for BWTS remote monitoring considering the satellite communication charge fee. In the our study, we implemented the safety and cost-saving communication modules by LabVIEW program. The collected sensor informations is encrypted and compressed by LabVIEW modules running on RIO. Then they will be transfer to the land server and will be decrypt to enable monitoring in the land server. For the verification, we build the test modules which can verify from collecting the sensor data to consuming them in the monitoring server. We carried out 20 times for the data pattern in all of case. So, we verified the excellent functionality and reliability through the experimental result.

A Correlational Study on Uncertainty and Coping in Families of children with Cancer (암 환아 가족의 질병에 대한 불확실성과 대처양상에 관한 연구)

  • 민영숙
    • Journal of Korean Academy of Nursing
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    • v.24 no.4
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    • pp.529-544
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    • 1994
  • For most parents their child's illness and hospitalization is strssful. Internal stress and over anxiousness leads to uncertainty. Parents have a variety of ways of coping when faced with such stress factors, especialy when the child has cancer. The purpose of this study was to examine the relationship between uncertainty in illness and mastery and coping styles in parents of pediatric cancer patients, and further to identify differences between three groups of subjects. A cross-sectional descriptive correlational design was used in this study to investigate the relationship among the three groups. The sample was composed of 59 parents of children with cancer in pediatric wards in three hospitals in Seoul : 21 in Group 4 with a child newly diagnosed with cancer : 25 in Group B, with a child under treatment and rehospitalized with a relapse : and 13 in Group C, with a child with a terminal cancer, A formalized questionnaire which included demegrapic information and consisted of 75 items was used in this study ; The Parent Perception of Uncertainty Scale(PPUS) adapted form Mishel’s Uncertainty in Illness Scale, Pearlin & Schooler's Mastery Scale(MS) and Folkman & Lazarus’s Ways of Coping Checklist(WCC) were used to measure the variables : uncertainty in illness, mastery, and coping styles. A pretest was conducted on the questionnaire items for reliability. The results gathered were analyzed using SPSS /PC/sup +/. Data analysis included descriptive correltional statistics such as ANOVA, Pearson Correlation Coefficient, amd chi square test. The conclusions of this analysis are summarized as follows : 1. A higher level of uncertainty was seen among parents of children with terminal cancer. 2. The first hypothesis that uncertainty in illness would differ among the three groups was supported(F=4.182, P=.020). The second and third hypotheses that mastery and coping styles would differ among the three groups were not supported. There was a correlation between uncertainty, mastery, and coping styles which was positive, also there was a positive correlation between mastery and coping style(r=.3744, P<.001) but a negative correlation between uncertainty md mastery(r=-.4749, P<.01). From the above results, it can be concluded that prediciting and controlling uncertainty in illness by considering coping styles and mastery are necessary for improved, efficient nursing interventions.

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Study on the Satisfaction Use of Rehabilitation Exercise Room (일부 보건소의 재활운동실 이용 만족도에 관한 연구)

  • Kwon Seon Suk;Kwon Dong Youn
    • Journal of Korean Public Health Nursing
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    • v.17 no.2
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    • pp.203-211
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    • 2003
  • The purpose of this study was to investigate the degree of satisfaction in using rehabilitation exercise rooms in public health centers. A total of 100 subjects were participated in the study who were clients of rehabilitation exercise rooms in two public health centers in one city of Kyunggi Do, Korea. Data were collected from March 1 to 30, 2003 using questionnaire. The data were analyzed using SPSS/PC computer program. The result are as follows : 1. The mean age of subjects was 62.6 years old, and men constituted $67.0\%$ of the participants. Most participants $(64\%)$ were in the middle socioeconomic status, and $(65\%)$ of subjects was diagnosed as stroke. 2. Regarding the source of information about rehabilitation exercise room in public health center, $56.0\%$ obtain information from colleagues or neighbors, and for most participants the time required to travel to rehabilitation exercise room was less than 30min on foot. Among rehabilitation services, Taping therapy $(53.0\%)$ was most frequently used among participants, 3. Sum of all satisfaction score was $71.10(\pm6.60,\;range:\;1-90)$ showed higher level of satisfaction. Cost, reliability, and kindness were main factors that affect the degree of satisfaction among participants. 4. Twenty-four percent of the respondents utilized clinic services in the health centers, and $27.4\%$ stoped rehabilitation services from hospitals and/or clinics due to high cost. 5. In the use of rehabilitation exercise room was positively correlated to age (r=.214, p<0.05) and disease duration(r=.241. p<0.05).

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