• Anxiety and mood
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• v.13 no.2
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• pp.115-122
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• 2017

Objective : The experiences in close relationships questionnaire-revised (ECR-R) (Fraley, Waller & Brennan, 2000) is a valuable tool for measuring adult attachment, and its Korean version, the ECRR-K (Kim, 2004), is widely used in Korea. However, given its substantial length, this study was aimed to develop and validate a short version of the ECRR-K called the ECRR-K14. Methods : Two hundred and ninety-four medical students participated in this study in 2016. They completed the ECRR-K, the Perceived Stress Scale (PSS), the Rosenberg Self-Esteem Scale (RSES), and the UCLA Loneliness Scale (UCLA-LS). The study authors applied the Rasch rating scale to check each item's model fit and then performed confirmatory factor analyses (CFAs) to test the new scale's validity. Results : The authors selected seven items each for the anxiety and avoidance subscales, and the ECRR-K14 showed fair to good internal consistency (Cronbach's ${\alpha}=0.93$ and 0.92 for anxiety and avoidance, respectively). The anxiety subscale showed concurrent validity with the PSS and the RSES while the avoidance subscale showed concurrent validity with the UCLA-LS. The CFAs also demonstrated the validity of the model with a goodness-of-fit index of 0.916. Conclusion : The ECRR-K14 showed excellent reliability and validity and appears to be a promising instrument for measuring the two attachment dimensions in adults.

• Journal of the Korean Institute of Intelligent Systems
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• v.23 no.1
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• pp.7-11
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• 2013

Taking experts' knowledge to recommend items has shown some promising results in recommender system research. In order to improve the performance of the existing recommendation algorithms, previous researches on expert-based recommender systems have exploited the knowledge of a common expert group for all users. In this paper, we study a problem of identifying personalized experts within a user group, assuming each user needs different kinds and levels of expert help. To demonstrate this idea, we present a framework for using Support Vector Machine (SVM) to find varying expert groups for users; it is shown in an experiment that the proposed SVM approach can identify personalized experts, and that the person-alized expert-based collaborative filtering (CF) can yield better results than k-Nearest Neighbor (kNN) algorithm.

• The Journal of Korean Academic Society of Nursing Education
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• v.22 no.2
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• pp.228-239
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• 2016

Purpose: To develop and test the validity and reliability of the Korean version of the Moral Distress Scale-Revised (KMDS-R) to assess its applicability to Korean hospital nurses. Methods: The KMDS-R was articulated through forward-backward translation methods. Internal consistency reliability, construct and criterion validity was calculated using SPSSWIN(19.0). Survey data were collected from 188 nurses from a university hospital in Gangwon-do, South Korea. Results: The KMDS-R showed reliable internal consistency with a Cronbach's alpha of .69-.87 and a Guttman Split-half of .69-.82 for the total scale. Factor loading of the 21 items on the five subscales ranged from .41-.80. The KMDS-R was validated by factor analysis and explained 63% of moral distress for Korean hospital nurses. Criterion validity compared to Yoo's MDS showed significant correlation. Conclusion: The results suggest promising evidence of the KMDS-R's reliability and validity. It is used to measure moral distress for Korean hospital nurses.

• Korean Management Science Review
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• v.31 no.1
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• pp.1-15
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• 2014

As the scarcity of natural resources has become apparent, the recycling industry has emerged as a promising one for its growth potential. Yet, the recycling industry still remains undeveloped and inefficient for various reasons. In this study, we focus on firms' recycling processes to understand the current status of recycling firms' value creation activities. With respect to the adopted recycling processes, we empirically investigate the differences in firm characteristics and firm performance. We use the data from Keco (Korea Environment Cooperation) which annually conducts a survey of recycling firms in Korea. We exclusively consider the whole group of plastic recycling industry in order to control for a possible bias in firm performance, stemming from the heterogeneity in processing and recycling of materials other than plastics. We review the descriptive statistics from the sample firms and conduct a series of hierarchical regression analyses. The results show that most of the firms in this industry adopt physical transformation processes with a low-level technology. These firms with physical transformation processes are smaller in size and produce entry level items which do not secure higher margins. The results indicate that the recycling industry largely comprises low value added firms which lack economies of scale and resources for R&D. For the stable growth of the industry, recycling firms must create sustainable values through implementation of technology-driven processes and improvement in product quality. In addition, the government should help build a reliable reverse logistic network, lower the entry barriers, and provide necessary funding for the SMEs in the recycling industry.

• Journal of the Korea Society for Simulation
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• v.22 no.3
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• pp.35-41
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• 2013

This paper applies an active period based bottleneck detection method to flow shop manufacturing system with limited buffer size. Manufacturing systems are constrained by one or more bottlenecks which degrades the system throughput. Conventional bottleneck detection methods include the waiting time or queue length of production stations and their utilization. Due to the random events such as production time of items, machine failure and repair times, the systems may change over time, and subsequently bottlenecks shift from one station to another station. Active period of working station may cause other stations to wait for productions. Information when and where active periods occur helps to find bottlenecks in production systems. Based on these informations, we predict bottlenecks in applying AweSim simulation language. We compare the simulation results of conventional methods with those obtained from duration of active period method, and duration ratio method of both sole and shift bottleneck periods. Even though simulation results are from simple flow shop model, they are quite promising for predicting bottlenecks of production stations. We hope this study aids in decision making regarding the improving system production yield and allocation of available resources of system.

• Journal of Information Management
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• v.37 no.4
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• pp.105-124
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• 2006

The nuclear knowledge management is now being operated in the KAERI and also actively practiced in other member states of the IAEA. The INIS secretariat leads the knowledge management. As the traditional service areas of librarians are decreasing, the knowledge management is considered as a promising service area replacing the traditional librarian's role. This new area is in Blue Ocean and needs to great concern and understanding. INIS is the world's leading information system on the peaceful uses of nuclear energy. INIS is operated by the IAEA in collaboration with its member states and cooperating international organizations. INIS has more than 2.7 million items and provides users a comprehensive information reference service for literature in nuclear science and technology. The input amount ranks fifth in the world and it operates the INIS 2 host site. INIS in Korea is playing a leading role in the IAEA.

• Journal of Periodontal and Implant Science
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• v.51 no.6
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• pp.386-397
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• 2021

Purpose: MicroRNAs (miRNAs) are epigenetic post-transcriptional regulators that modulate gene expression and have been identified as biomarkers for several diseases, including cancer. This study aimed to systematically review the relationship between miRNAs and periodontal disease in humans, and to evaluate the potential of miRNAs as diagnostic and prognostic biomarkers of disease. Methods: The review was conducted following the Preferred Reporting Items for Systematic Reviews and Meta-Analysis guidelines (reference number CRD42020180683). The MEDLINE, Scopus, Cochrane Library, Embase, Web of Science, and SciELO databases were searched for clinical studies conducted in humans investigating periodontal diseases and miRNAs. Expression levels of miRNAs across the different groups were analysed using the collected data. Results: A total of 1,299 references were identified in the initial literature search, and 23 articles were finally included in the review. The study designs were heterogeneous, which prevented a meta-analysis of the data. Most of the studies compared miRNA expression levels between patients with periodontitis and healthy controls. The most widely researched miRNA in periodontal diseases was miR-146a. Most studies reported higher expression levels of miR-146a in patients with periodontitis than in healthy controls. In addition, many studies also focused on identifying target genes of the differentially expressed miRNAs that were significantly related to periodontal inflammation. Conclusions: The results of the studies that we analysed are promising, but diagnostic tests are needed to confirm the use of miRNAs as biomarkers to monitor and aid in the early diagnosis of periodontitis in clinical practice.

• Journal of the Korea Fashion and Costume Design Association
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• v.21 no.1
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• pp.17-33
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• 2019

The purpose of this study is to understand the present status of the international textile fashion conventions and the Korean textile fashion conventions in order to secure competitiveness in the textile fashion industry and to discover the satisfaction of the convention and to develop an improvement plan of the current textile and fashion conventions in Korea. For the method of study, five representative conventions of domestic and foreign textiles and fashion were selected and case analyses were conducted focusing on relevant reports. Also, the satisfaction and improvement of the conventions for companies, buyers and visitors attending the Preview in Seoul(PIS) convention were surveyed. The first result of the study was that international textile and fashion conventions have clarified their identity according to changes in the market environment and buyer's interest. For example, the professional exhibition changed the nature of the comprehensive convention or made it easier for many related businesses and buyers to attend the convention by sharing the same convention period and location with other conventions. In addition, the convention hall has been constructed to display promising items, such as eco-friendly materials and smart materials. Second, participating companies, buyers and visitors of the Preview in Seoul (PIS) convention were generally satisfied with the convention, but were aware of the need for change. In particular, the satisfaction level with the number and level of new buyers at home and abroad, the number of counseling sessions and the quality level were also found to be low.

• International Journal of Computer Science & Network Security
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• v.22 no.8
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• pp.35-44
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• 2022

The Internet is extremely important to accomplish numerous items, from education to businesses and entertainment. Therefore, the quality of its performance must be efficient. Nowadays, there is a lack of information available for users to choose a suitable Internet service. What information is available might be insufficient, inaccurate, or regularly updated. Accordingly, there is a need to develop an electronic system that enables users to evaluate their current Internet service subscription. Several factors are used as evaluation criteria in the system that affect users' decisions. In this paper, a prototype of a design science research project is proposed to address a few objectives. First, it can help Internet service users in Saudi Arabia to make the best decision for themselves regarding Internet services subscriptions. Second, it can assist the Saudi government to seek one of the 2030 vision goals: the digital transformation that depends on having a good Internet connection. The proposed solution is a promising one that would help Internet service users to make the best decision for themselves and choose the best Internet service that fits their needs. A qualitative method has been used to evaluate the efficiency and the utility of the proposed system prototype. The results showed the extent of participants' acceptance of the Internet Service Evaluation System.

• Journal of Periodontal and Implant Science
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• v.52 no.6
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• pp.479-495
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• 2022

Purpose: Rodent models have emerged as an alternative to established larger animal models for peri-implantitis research. However, the construct validity of rodent models is controversial due to a lack of consensus regarding their histological, morphological, and biochemical characteristics. This systematic review sought to validate rodent models by characterizing their morphological changes, particularly marginal bone loss (MBL), a hallmark of peri-implantitis. Methods: This review was conducted following the Preferred Reporting Items for Systematic Reviews and Meta-Analysis (PRISMA) guidelines. A literature search was performed electronically using MEDLINE (PubMed), and Embase, identifying pre-clinical studies reporting MBL after experimental peri-implantitis induction in rodents. Each study's risk of bias was assessed using the Systematic Review Center for Laboratory animal Experimentation (SYRCLE) risk of bias tool. A meta-analysis was performed for the difference in MBL, comparing healthy implants to those with experimental peri-implantitis. Results: Of the 1,014 unique records retrieved, 23 studies that met the eligibility criteria were included. Peri-implantitis was induced using 4 methods: ligatures, lipopolysaccharide, microbial infection, and titanium particles. Studies presented high to unclear risks of bias. During the osseointegration phase, 11.6% and 6.4%-11.3% of implants inserted in mice and rats, respectively, had failed to osseointegrate. Twelve studies were included in the meta-analysis of the linear MBL measured using micro-computed tomography. Following experimental peri-implantitis, the MBL was estimated to be 0.25 mm (95% confidence interval [CI], 0.14-0.36 mm) in mice and 0.26 mm (95% CI, 0.19-0.34 mm) in rats. The resulting peri-implant MBL was circumferential, consisting of supra- and infrabony components. Conclusions: Experimental peri-implantitis in rodent models results in circumferential MBL, with morphology consistent with the clinical presentation of peri-implantitis. While rodent models are promising, there is still a need to further characterize their healing potentials, standardize experiment protocols, and improve the reporting of results and methodology.