• Journal of Korean Society of Occupational and Environmental Hygiene
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• v.15 no.1
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• pp.27-35
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• 2005

This study was carried out to evaluate the characteristics of petroleum refinery workers' exposure to organic solvents. Exposure assessment was conducted by full shift-based long term personal sampling(TWA-P) and task-based short term personal sampling(STEL-P) strategy. Major organic solvents that workers can be exposed are various, varying from C3~C12, and this study focused on 11 kinds including benzene, considering toxicity and concentration level. In comparison with two sampling results, STEL-P shows a significant(p<0.001) excess of exposure level rather than TWA-P. As the potential risk index for benzene is calculated as 16, benzene should be set the highest priority for control in petroleum refinery industry. The tasks with the highest benzene exposure level were de-watering(AM;99.8 ppm), draining(AM;19.6ppm), sampling(AM;16.2ppm), and manual gauging(AM;15.02ppm). Petroleum refinery workers' exposure pattern to organic solvents differs by tasks performed, and some task has a high risk of temporary extreme exposure. Therefore, traditional 8-hour TWA sampling strategy have possibility of underestimation of exposure level of workers in petroleum refinery.

• The Journal of Information Technology
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• v.1 no.1
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• pp.155-172
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• 1998

Electronic commerce is more than just handling purchase transactions and funds transfers over the internet. Despite electronic commerce's past roots in transactions between large corporations, banks, and other financial institutions, the use of the internet as a way to bring electronic commerce to the individual consumer has led to a shift in viewpoint. Over the past few years, both the press and the business community have increased their focus on electronic commerce involving the consumer Electronic commerce includes the tasks that support the buying and selling of goods and services, and interactions among those tasks. Electronic commerce enables companies to close stores, reduce inventory requirements, and distribute products over the internet. Electronic commerce can simplify communication and change relationships The economics of electonic commerce is concernec with a new market whose delivery and communication infrastructure happens to be the internet. The economics of electronic commerce focuses on markets whose transactions are facilitated by communications networks and delivery systems. However, any digital communications media will soon be capable of supporting virtual transactions In the electronic marketplace, including telephone wires, cables, microwaves, and satellites. Thus, electronic commerce can offer your company both short-term and long-term befits. moving business practices, such as ordering, invoicing, and consumer support, to network-based systems can also reduce the paperwork involved in business-to-business transactions. This study conducted a study on economic effects of electronic commerce

• Membrane Journal
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• v.30 no.2
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• pp.124-130
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• 2020

Climate change is getting worse in the 21st century. So, water shortages are expanding worldwide. Carbon dioxide generated from the use of fossil fuels is 80% of the total green house gas. Because it occupies, it has become a factor of global warming. Therefore, the importance of water treatment membrane, gas separation membrane, and secondary battery separation membrane is increasing, but it occupies technology in developed countries such as the United States, Japan, and Germany. Therefore, the advancement of membrane technology is urgently required. So, although the country supports a lot of research budgets, We will analyze the results using NTIS data. As a result of the analysis used, it is supported mainly for short-term tasks, and the research budget is small compared to other technical fields, so the basic material field technology is weak. Therefore, when we invest a lot of long-term tasks, with a lot of budget, and universities, membrane technology has been improved and competitiveness has been strengthened.

• Convergence Security Journal
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• v.21 no.4
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• pp.87-99
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• 2021

It is only about one year for Lieutenant officers to adapt to the position after completing continuing education the experienced Lieutenant officer. In addition, while the application rate for short-term service officers is gradually decreasing, it is also affecting the acquisition of excellent resources. In this regard, most of the studies on the development of military school education so far suggest alternatives from a long-term perspective or a comprehensive perspective on education policy, so there is no discussion from a realistic and practical perspective. Accordingly, this study analyzed the actual conditions of the training for remuneration for Lieutenant officers, examined previous studies, drew major issues, established research problems, and analyzed opinions collected through in-depth interviews with civilian education experts and military education stakeholders. As a result of the analysis, policy tasks such as effective curriculum reorganization, upward adjustment of teacher-related grades, and expansion of leadership education were suggested. The results of this study are meaningful in that they provide implications for realistic and practical improvement plans for the qualitative improvement of continuing education for Lieutenant officers in the army.

• Journal of Navigation and Port Research
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• v.38 no.2
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• pp.127-134
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• 2014

This paper aims to identify what is needed to improve the English for Specific Purposes(ESP) curriculum for English as a Foreign Language(EFL) college learners at navigation school. Different needs from learners and experienced professionals are identified through diversified methods, and the findings from these are analysed and consolidated from a balanced point of view. For this purpose, putting learners at the centre of analysis, identifying their subjective and objective needs serves as a point of departure in formulating the curriculum. Then, the target situation is analysed according to the short-term aim of getting a job, followed by long-term needs for successfully fulfilling future duties as a pilot. Based on findings, it is suggested that ESP curriculum for learners in navigation studies should be focused on the successful language performance of their actual duties and tasks to be given in the future working situations, rather than on immediate needs for getting a job. In particular, special attention needs to be paid to enhancing learners' productive language competences through a series of hands-on trainings and a wide range of extra-curricular activities, specifically for a higher command of oral communication. For this, not only ESP, curriculum for EGP(English for General Purposes) should be systematically structured as ESP-oriented EGP, and naturally move onto areas of ESP in a coherent manner.

• Child Health Nursing Research
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• v.9 no.1
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• pp.96-106
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• 2003

Advances in neonatal care system and research have resulted in an increased survival rate among low birth weight infants in the industrialized countries. Recent Korean neonatal mortality and morbidity statistics, and current status of Korean neonatal intensive care facilities were reviewed here for the sake of future improvement and research. Morbidity statistics revealed that perinatal diseases accounted for 80％ of the death of premature infants implying the possibility of its reduction by the vigorous prenatal care service in future.On the basis of extensive studies of nutritional support and growth rate of premature infants, commercial formulas for premature infants have been developed and various aspects of feeding techniques are standardized. However, problem of growth deficit of premature infants remains unsolved as medical problem. NICU specialists are challenged with the tasks of prenatal education or provision of care that minimizes the neurodevelopmental problems seen in preterm infants, various short-term outcome researches have been reported and those are reviewed here to promote research interest in the field of neonatal nursing. Systemic long-term outcome studies are also awaited in Korea for the formulation of welfare policy in future. Nursing science has to embrace all these interdisciplinary studies as their own research field in collaboration with neonatologist, nutritionist, rehabilitation therapist, social workers and teachers.

• Korean Journal of Childcare and Education
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• v.17 no.2
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• pp.1-27
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• 2021

Objective: Covid-19 is changing many aspects of child care programs. The objective of this study was to explore how the pandemic and mitigation efforts affected the experiences and practices at child care centers in the summer of 2020. Methods: Focus group interviews and mobile surveys were conducted with principals and teachers of child care centers in August and September 2020. Descriptive statistics including frequency distributions, means and standard deviations and mean differences were used to analyze the survey data with SPSS 22.0. Results: It was found that each sector of child care settings experienced different difficulties and had various needs. Young children's lack of energy, child care teachers' workload and stress, and principles' efforts to interrupt transmission of the infectious disease based on insufficient government guideline and supports were revealed as the main experiences. Conclusion/Implications: The Covid-19 pandemic has had a tandem of influences on daily life at child care centers. As policy makers consider additional guidelines or supports measures to prevent the infection and spread of Covid-19 at child care centers, long-term as well as short-term plans at various levels should be considered to meet the unique needs of child care programs.

• Journal of Family Resource Management and Policy Review
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• v.11 no.4
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• pp.171-189
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• 2007

The purpose of this ethnography is to describe and analyze the process of becoming a wild geese mother. Thirteen mothers from New York, California, and Texas of U.S.A. were interviewed with an unstructured questionnaire. There are several different patterns of the process; 'the short term', 're-departure after returning to Korea', 'a step to initiate their family's immigration', 'sudden and unintentional'. In the first stage of the family living rearrangement, the main issues are about the wider free world, proper time for leaving and proper period for staying, where to live and my husband's independent living. The wild geese mothers perform the concrete tasks about the everyday living for the new mother-child family in the foreign country. They report their subjective interpretation for their new life.

• ETRI Journal
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• v.39 no.6
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• pp.832-840
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• 2017

Recently, deep recurrent neural networks have achieved great success in various machine learning tasks, and have also been applied for sound event detection. The detection of temporally overlapping sound events in realistic environments is much more challenging than in monophonic detection problems. In this paper, we present an approach to improve the accuracy of polyphonic sound event detection in multichannel audio based on gated recurrent neural networks in combination with auditory spectral features. In the proposed method, human hearing perception-based spatial and spectral-domain noise-reduced harmonic features are extracted from multichannel audio and used as high-resolution spectral inputs to train gated recurrent neural networks. This provides a fast and stable convergence rate compared to long short-term memory recurrent neural networks. Our evaluation reveals that the proposed method outperforms the conventional approaches.

• Journal of the Korea Society of Computer and Information
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• v.23 no.11
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• pp.31-41
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• 2018

Text classification has been studied for a long time in the Natural Language Processing field. In this paper, we propose an article- and paragraph-level genre classification system using Word2Vec-based LSTM, GRU, and CNN models for large-scale English corpora. Both article- and paragraph-level classification performed best in accuracy with LSTM, which was followed by GRU and CNN in accuracy performance. Thus, it is to be confirmed that in evaluating the classification performance of LSTM, GRU, and CNN, the word sequential information for articles is better than the word feature extraction for paragraphs when the pre-trained Word2Vec-based word embeddings are used in both deep learning-based article- and paragraph-level classification tasks.