• Journal of Soil and Groundwater Environment
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• v.23 no.6
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• pp.54-72
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• 2018

This study reviewed standard operation procedures for fractionation and analytical methods of total petroleum hydrocarbons (TPH) in north america and european countries to aid proper establishment of risk assessment protocols associated with TPH exposure in Korea. In current, the TPH fraction methods established by Massachusetts Department of Environmental Protection (MassDEP) and Total Petroleum Hydrocarbon Criteria Working Group (TPHCWG) are most frequently employed worldwide. Both methods were developed on the basis of direct exposure of TPH from soil, although the method by TPHCWG also took into account the mobility of TPH. Volatile and extractable fractions of petroleum hydrocarbons were analyzed either separately or together. TPH fractionation methods were evaluated based on conservative toxicity values considering the uncertainty of risk assessment in light of current standard protocol for analyzing soil contaminants in Korea, and it was concluded that the method developed by MassDEP is more appropriate.

• Journal of Digital Convergence
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• v.17 no.6
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• pp.93-104
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• 2019

The ppuri industry is growing in technical importance due to the 4th industrial revolution and is growing steadily. However, securing skilled workers is hardly realistic, and foreign workers are increasing. The purpose of this study is to find organizational commitment on for improvement of in-role performance of foreigners and Koreans working in ppuri companies and to find ways to support differentiation through comparison between groups. The subjects of this study were foreigners and Koreans in the ppuri company. Through the survey, 393 valid samples were collected. We use structural equation modeling to verify the research hypotheses, and conducted a survey on the employees of organization with information security policy. The results showed that in the case of foreigners, balanced processing affects in-role performance through organizational commitment. In the case of Koreans, relational transparency, balanced processing, and internalized moral perspectives affect in-role performance through organizational commitment. The results of the analysis suggest a strategic approach to improve the in-role performance of each group.

• Journal of Internet Computing and Services
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• v.20 no.3
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• pp.77-84
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• 2019

Workflow management system is a system that manages the workflow model which defines the process of work in reality. We can define the workflow process by sequencing jobs which is performed by the performers. Using the workflow management system, we can also analyze the flow of the process and revise it more efficiently. Many researches are focused on how to make the workflow process model more efficiently and manage it more easily. Recently, many researches use the workflow log files which are the execution history of the workflow process model performed by the workflow management system. Ourresearch group has many interests in making useful knowledge from the workflow event logs. In this paper we use XES log files because there are many data using this format. This papersuggests what are the cardinalities of the temporal workcases and how to get them from the workflow event logs. Cardinalities of the temporal workcases are the occurrence pattern of critical elements in the workflow process. We discover instance cardinalities, activity cardinalities and organizational resource cardinalities from several XES-based workflow event logs and visualize them. The instance cardinality defines the occurrence of the workflow process instances, the activity cardinality defines the occurrence of the activities and the organizational cardinality defines the occurrence of the organizational resources. From them, we expect to get many useful knowledge such as a patterns of the control flow of the process, frequently executed events, frequently working performer and etc. In further, we even expect to predict the original process model by only using the workflow event logs.

• The Journal of the Korea Contents Association
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• v.19 no.1
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• pp.174-186
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• 2019

This study was designed to examine the demographic, economic and organizational characteristics of wage peak workers in public enterprises and their relationship between wage peak system and retirement, which is faster than other areas where the number of elderly workers is growing. The study targets 211 wage peak workers in 19 public enterprises engaged in the wage peak system, considering the level of aging and the size of wage peak workers. According to the demographic and economic characteristics, the results of the study showed that the education level, household income, post retirement cost, retirement saving and investment amount had an effect on wage peak satisfaction, wage peak acceptance, retirement preparation and retirement attitude. Next, aspects of organizational characteristics, there were differences according to position, job title, working period, remaining retirement age, participation in retirement preparation program and wage peak application. Based on these findings, effective wage peak system for the aged society was required to discuss the need for follow-up research by job group, position rank, economic level, and educational level of aged people such as welfare, education and former support.

• Korean Journal of Community Nutrition
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• v.24 no.2
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• pp.117-126
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• 2019

Objectives: This study was conducted to investigate the current difficulties surrounding children's obesity management and evaluate the application of a mobile phone as a tool to overcome such difficulties of obesity management from the perspective of main caregivers of elementary school students. Methods: The qualitative data were collected through 3 focus group interviews including 6 full-time housewives, 7 mothers with overweight children, and 4 working mothers. Data were analyzed using a thematic approach. Results: The limitations of current children's obesity management included difficulty in diet management and exercise as well as challenges of setting goals and lack of support at the household and school levels. Mobile technology may be useful to overcome the current problems by providing real-time knowledge on diet management and physical activity, online compensation scheme according to goal setting, and interactive environmental supports at both household and school levels for promoting overall health. Conclusions: The mobile-based multiple support program may assist in overcoming the current limitations of child obesity management by providing tailored information and by creating a more supportive environment.

• Korean Circulation Journal
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• v.48 no.12
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• pp.1033-1080
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• 2018

Atrial fibrillation (AF) is the most common sustained cardiac arrhythmia in the general population. The Korean Heart Rhythm Society organized a Korean AF Management Guideline Committee and analyzed all available studies regarding the management of AF, including studies on Korean patients. This guideline is based on recent data of the Korean population and the recent guidelines of the European Society of Cardiology, European Association for Cardio-Thoracic Surgery, American Heart Association, and Asia Pacific Heart Rhythm Society. Expert consensus or guidelines for the optimal management of Korean patients with AF were achieved after a systematic review with intensive discussion. This article provides general principles for appropriate risk stratification and selection of anticoagulation therapy in Korean patients with AF. This guideline deals with optimal stroke prevention, screening, rate and rhythm control, risk factor management, and integrated management of AF.

• The Journal of the Convergence on Culture Technology
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• v.4 no.4
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• pp.249-259
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• 2018

The purpose of this study was to investigate nurses' consciousness of biomedical ethics and professionalism in general hospitals. Participants in this study were 163 nurses working in 3 general hospitals. Data analysis was done using SPSS / WIN 24.0 program. As a result of this study, the consciousness of biomedical ethics of the nurse was moderate. The highest sub-area was 'right to life of fetus' and 'artificial abortion' was the lowest sub-area. The professionalism of the subjects was moderate. The highest sub-area was 'reference professional group' and 'sense of mission' was the lowest sub-area. The nurses' consciousness of biomedical ethics was related to professionalism. Therefore, nurses should be educated to help ethical decision making so that they can have bioethical value and bioethical decision making ability according to the changes and demands of the times. In addition, institutional arrangements to improve professionalism should be provided.

• Korean Journal of Acupuncture
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• v.35 no.4
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• pp.187-202
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• 2018

Objectives : Non-invasive transcranial electrical stimulation is one of therapeutic interventions to change in neural excitability of the cortex. Transcranial electro-acupuncture (TEA) can modulate brain functions through changes in cortical excitability as a model of non-invasive transcranial electrical stimulation. Some composites of fermented Scutellaria baicalenis (FSB) can activate intercellular signaling pathways for activation of brain-derived neurotrophic factor that is critical for formation of neural plasticity in stroke patients. This study was aimed at evaluation of combinatory treatment of TEA and FSB on behavior recovery and cortical neural excitability in rodent focal stroke model. Methods : Focal ischemic stroke was induced by photothrombotic injury to the motor cortex of adult rats. Application of TEA with 20 Hz and $200{\mu}A$ in combination with daily oral treatment of FBS was given to stroke animals for 3 weeks. Motor recovery was evaluated by rotating bean test and ladder working test. Electrical activity of cortical pyramidal neurons of stroke model was evaluated by using multi-channel extracellular recording technique and thallium autometallography. Results : Compared with control stroke group who did not receive any treatment, Combination of TEA and FSB treatment resulted in more rapid recovery of forelimb movement following focal stroke. This combination treatment also elicited increase in spontaneous firing rate of putative pyramidal neurons. Furthermore expression of metabolic marker for neural excitability was upregulated in peri-infract area under thallium autometallography. Conclusions : These results suggest that combination treatment of TEA and FSB can be a possible remedy for motor recovery in focal stroke.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.18 no.6
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• pp.53-61
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• 2018

Recently, technologies related to the Internet of Things have developed rapidly and research on mobile environment home network systems is actively in progress. The Internet Engineering Task Force (IETF) Working Group proposed the CoAP/6LoWPAN technology as a suitable protocol for internetworking IoT devices with the Internet in a limited environment and adopting it as a standard. However, the existing home network systems hardly include security protocols. IETF recommends DTLS(Datagram Transport Layer Security) on UDP as security protocol suitable for IoT environments. In this paper, smart home network system based on CoAP/6LoWPAN by using DTLS is implemented in mobile environments. The data transfer time is measured according to each procedure of the DTLS protocol and the need to improve DTLS protocol is suggested.

• Journal of Korean Society of Forest Science
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• v.107 no.4
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• pp.428-435
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• 2018

The purpose of this study is to analyze the satisfaction level of regular safety education to reduce and prevent accidents of forest workers. To achieve this goal, a questionnaire survey targeting 362 members of forest working group in National Forestry Cooperative Federation on the status of safety education, requirements for improving safety education, and satisfaction level of safety education. As a result of the analysis, the majority of the respondents said that the safety education should be improved by adding more training related to forestry work and practical education rather than the current lecture. In the effective safety education cycle, 43.8% of respondents said that the most effective once a week, and the most important factors that affect the satisfaction of safety education were the safety method and teaching ability, which were statistically significant.