• Proceedings of the Korean Institute Of Construction Engineering and Management
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• 2004.11a
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• pp.265-270
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• 2004

Efficient Professional Engineers(PE) play an important role in development of the scientific technology and the national industry. Recent technologies have been more complicated, fusionized and globalized. Thus it is required to establish total system doing the PE more competitive and specialized. This study is to Propose 'an improvement system for the current Specialized Engineer System(so-called recognized PE)' and 'an Unifying method of managing PE' by the professional Engineers Act for Korean PE so as to meet the global standards. As Improvement policy for the Specialized Engineer system, some alternatives are suggested including removal or change of the recognized PE. And two improved alternates were also suggested in order to manage the PE more systematic and competitive. One of the two is that the Ministry Of Science and Technology(MOST) have an authority to manage every activities associated with PE system for example PE qualification, PE exam, PE CPD(continuing professional development), PE employment, and so on.

• Journal of Environmental Policy
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• v.2 no.1
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• pp.51-75
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• 2003

The objective of this study is to analyze the problems of disposal and collection, including administrative management of agricultural PE waste and suggest effective management measurements. Information regarding problems of agricultural PE waste management were collected from field survey of farmers, regional governments and officials. On the national level, the low ratio of collection for optimal treatment of agricultural PE waste is a critical problem. , the negative discharging behavior of farmers, an illegal incineration and landfill of farmers and a lack of education and extension etc. An ambiguity of the management principle to agricultural PE waste, the differences in management among the regional governments, a lack of will of the regional governments and officials to realize SARD and lack of education and extension etc. are some of the problems in administrative management of agricultural PE waste collection. The major suggestions of this study are as follows : (1) to strengthen education and extension, (2) to adopt an improved economic incentive system and strong, lawful regulation simultaneously, (3) to use temporang collection and permanent collection site, and (4) to organize "OTC(Optimal Treatment Conference)" composed of farmers, regional cooperative, PE producers etc. for operating an effective management system.

• Journal of Digital Convergence
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• v.12 no.9
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• pp.225-235
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• 2014

The purpose of this study is to examine the association between regular exercise habit, self-rated health status, health practice index, and health promotion lifestyle profile among 241 college male students from Gyeonggi-do. Subjects were divided into two groups: students majoring in physical education(PE) and students who are not majoring in PE. The average BMI were $22.77{\pm}2.74$ among PE majors and $21.57{\pm}4.30$ among the other group. PE majors showed higher results in all of physiological, subjective and social health conditions. Both groups showed low scores in health practice index, which were $2.86{\pm}1.10$ among PE majors and $2.97{\pm}1.46$ among non-PE majors, showing no difference in statistical significance. Index for health promoting lifestyle practices were somewhat higher among PE majors; however, there were no statistical significance with the results of $123.38{\pm}19.93$ among PE majors and $119.98{\pm}22.04$ among non-PE majors. The analysis on the index for health promoting lifestyle practices in sub-categories showed that PE majors showed significantly higher scores compared with non-PE majors in physical activities area and vice versa in nutrition area.

• Journal of Digital Convergence
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• v.10 no.10
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• pp.423-430
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• 2012

This study focused on the characterization of recycle PE/PET/TPE blend with compatibilizers. The heat resistance and impact strength of a weak point on PET/HDPE blend has been improved. TPE added polyester-based recycle heat-resistant properties to $150^{\circ}C$ showed more than $50^{\circ}C$ higher than HDPE added. Elastomer applied is a significant increase in the impact strength, and then it is possible to apply for safety materials in industries requiring heat-resistance and elasticity. Also using PET blend compatibilizer improves the strength of the polyolefin resin. The mechanical properties of recycle HDPE and PET blend has been greatly improved, and the reduction in the size of the dispersed phase by the addition of compatibilizers on morphology characteristics were observed uniformity becomes.

• Journal of applied mathematics & informatics
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• v.6 no.2
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• pp.539-552
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• 1999

An order-level inventory model for a perishable product with a time-dependent demand is developed for a fixed planning pe-riod allowing backlogging in all cycles within the said period. The market demand is assumed to decrease exponentially as time elapses. The average system cost is derived and its optimization procedure is illustrated with a numerical example. Sensitivity of the optimal so-lution to changes in the values of different parameters of the system is also analysed.

• Journal of Digital Convergence
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• v.18 no.10
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• pp.265-275
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• 2020

The purpose of this study is to investigate the mediating effect of psychological empowerment (PE) in the relationship between nursing work environment (NWE) and job involvement (JI) of nurses in operating rooms of small- and medium- hospitals. Subjects were 150 nurses in operating rooms of 24 small- and medium- hospitals nationwide, and data were collected from July to September 2018 using a structured questionnaire. Data were analyzed by t-test, ANOVA, Pearson's correlation coefficients and multiple regression. As a result of the study, JI was positively correlated with NWE or PE, PE was positively correlated with NWE. PE was found to partially mediate the effect of NWE on JI. In order to help nurses in small- and medium-sized hospital operating rooms to positively recognize the NWE and immerse themselves in the job, it is necessary to develop convergence program to increase PE.

• Nutrition Research and Practice
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• v.16 no.5
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• pp.549-564
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• 2022

BACKGROUND/OBJECTIVES: Oxidative stress is caused by an imbalance between harmful free radicals and antioxidants. Long-term oxidative stress can lead to an "exhausted" status of antioxidant defense system triggering development of metabolic syndrome and chronic inflammation. Green perilla (Perilla frutescens) is commonly used in Asian cuisines and traditional medicine in southeast Asia. Green perilla possesses numerous beneficial effects including anti-inflammatory and antioxidant functions. To investigate the potentials of green perilla leaf extract (PE) on oxidative stress, we induced oxidative stress by high-fat diet (HFD) in aging mice. MATERIALS/METHODS: C57BL/6J male mice were fed HFD continuously for 53 weeks. Then, mice were divided into three groups for 12 weeks: a normal diet fed reference group (NDcon), high-fat diet fed group (HDcon), and high-fat diet PE treated group (HDPE, 400 mg/kg of body weight). Biochemical analyses of serum and liver tissues were performed to assess metabolic and inflammatory damage and oxidative status. Hepatic gene expression of oxidative stress and inflammation related enzymes were evaluated by quantitative real-time polymerase chain reaction (qRT-PCR). RESULTS: PE improved hepatopathology. PE also improved the lipid profiles and antioxidant enzymes, including hepatic glutathione peroxidase (GPx) and superoxide dismutase (SOD) and catalase (CAT) in serum and liver. Hepatic gene expressions of antioxidant and anti-inflammatory related enzymes, such as SOD-1, CAT, interleukin 4 (IL-4) and nuclear factor erythroid 2-related factor (Nrf2) were significantly enhanced by PE. PE also reduced the levels of hydrogen peroxide (H₂O₂) and malondialdehyde (MDA) in the serum and liver; moreover, PE suppressed hepatic gene expression involved in pro-inflammatory response; Cyclooxygenase-2 (COX-2), nitric oxide synthase (NOS), interleukin 1 beta (IL-1β), and interleukin 6 (IL-6). CONCLUSIONS: This research opens opportunities for further investigations of PE as a functional food and possible anti-aging agent due to its attenuative effects against oxidative stress, resulting from HFD and aging in the future.

• Genomics & Informatics
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• v.15 no.3
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• pp.87-97
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• 2017

Multiple myeloma (MM) is a malignant disease caused by an abnormal proliferation of plasma cells, of which the prognostic factors include chromosomal abnormality, ${\beta}$-2 microglobulin, and albumin. Recently, the term chromothripsis has emerged, which is the massive but highly localized chromosomal rearrangement in response to a one-step catastrophic event. Many studies have shown an association of chromothripsis with the prognosis in several cancers; however, few studies have investigated it in MM. Here, we studied the association between chromothripsis-like patterns and treatment resistance or prognosis. First, we analyzed nine MM cell lines (U266, MM.1S, RPMI8226, KMS-11, KMS-12-BM, KMS-12-PE, KMS-28-BM, KMS-28-PE, and NCI-H929) and bone marrow samples of four patients who were diagnosed with MM by next-generation sequencing-based copy number variation analysis. The frequency of the chromothripsis-like pattern was observed in seven cell lines. We analyzed the treatment-induced chromothripsis-like patterns in KMS-12-BM and KMS-12-PE cells. As a result, breakpoints and chromothripsis-like patterns were increased after drug treatment in the relatively resistant KMS-12-BM. We further analyzed the patients' results according to the therapeutic response, which was divided into sensitive and resistant, as suggested by the International Myeloma Working Group. The chromothripsis-like pattern was more frequently observed in the resistant group. In the sensitive group, the frequency of the chromothripsis-like pattern decreased after treatment, whereas the resistant group showed increased chromothripsis-like patterns after the treatment. These results suggest that the chromothripsis-like pattern is associated with treatment response in MM.

• Journal of Digital Convergence
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• v.13 no.11
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• pp.561-569
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• 2015

This study looks into the level of anxiety that middle school students have about PE class, dividing the classes into coed class and single-sex class and aims to conduct an in-depth analysis of differences in sub-factors of the anxiety. Subjects of the study were 554 students in randomly selected six middle schools located in Gyeonggi-do. To figure out the relationships among the sub-factors of the anxiety according to class, grade, academic record and the level of physical strength, a Multivariate Analysis of Variance model was set up and analysis was conducted. The results obtained through the research are as follows. First, it was predicted that the level of anxiety about PE class in middle school would have a great impact on the factor, 'punishment' by class (coed and single-sex). Second, it was predicted that the level of anxiety about PE class in middle school would have a great impact on the factors, 'anxiety about the event of sports' and 'conflict during class' by grade. Third, it was found that there was no difference in the level of anxiety about PE class that middle school students had according to their academic record in PE. Fourth, it was predicted that the level of anxiety about PE class in middle school would have a great impact on the factor of 'anxiety about the event of sports' by the level of physical strength.

• Journal of Digital Convergence
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• v.12 no.8
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• pp.147-155
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• 2014

Social commerce is a combination of social media and shopping. Social commerce, based on Web 2.0 technologies, has the various potentials, which is the factor attracting customers. In Korea, collegians are more active user of social media, in turn, are estimated more active customer in social commerce context. Present research explored what made Korean collegians use social commerce with extending technology acceptance model(TAM) with word-of-mouth(WOM) and perceived enjoyment(PE). We found that WOM affected indirectly the intention to use(ITU) with mediating PE, in turn, PE has a positive effect on the all of constructs in TAM. Accordingly, TAM extended with WOM and PE is validated in social commerce context. Finally, based on the findings, implications and suggestions for future studies are discussed.