• Journal of Korean Elementary Science Education
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• v.35 no.4
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• pp.389-405
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• 2016

The purpose of this study was to analyze elementary school teachers' understanding, certainty, and familiarity with 13 key concepts of wave physics that are presented in textbook and teacher's guidebook. 123 elementary school teachers answered concept tests and questionnaires. In the results to these tests and questionnaires, teachers demonstrated a high level of understanding and high certainty in understanding with regard to the concepts of sound generation, effect of medium on wave, timbre, wavelength, and trough and crest of wave. For the topics of sound velocity, wave reflection and wave transmission, teachers demonstrated a high level of understanding but low certainty in understanding. With regard to sound propagation, teachers demonstrated a low level of understanding and an improperly high certainty in that low understanding. Teachers lacked knowledge, i.e., displayed a low level of understanding and low certainty in sound strength, sound frequency, constructive interference and destructive interference. In constructive and destructive interference, the teachers also displayed a low level of familiarity. We analyzed the differences in teacher's understanding, certainty, and familiarity according to teacher demographics defined by the teacher's gender, teaching experience with concepts of sound, career, curriculum track while in high school, and major in university. There were no significant differences in understanding, certainty, or familiarity as defined by gender, teaching experience, and career. However, these displays of knowledge were affected by the teacher's curriculum track in high school and their major. These results suggest that the teacher's understanding of, familiarity with, and certainty in wave physics concepts are more influenced by their learning experience than by their teaching experience. Therefore, we suggest additional learning opportunities for teachers (such as teacher training programs) in order to improve teacher knowledge and correct teacher misconceptions in wave physics.

• Journal of Information Processing Systems
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• v.14 no.2
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• pp.346-376
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• 2018

Digital forensics is a vital part of almost every criminal investigation given the amount of information available and the opportunities offered by electronic data to investigate and evidence a crime. However, in criminal justice proceedings, these electronic pieces of evidence are often considered with the utmost suspicion and uncertainty, although, on occasions are justifiable. Presently, the use of scientifically unproven forensic techniques are highly criticized in legal proceedings. Nevertheless, the exceedingly distinct and dynamic characteristics of electronic data, in addition to the current legislation and privacy laws remain as challenging aspects for systematically attesting evidence in a court of law. This article presents a comprehensive study to examine the issues that are considered essential to discuss and resolve, for the proper acceptance of evidence based on scientific grounds. Moreover, the article explains the state of forensics in emerging sub-fields of digital technology such as, cloud computing, social media, and the Internet of Things (IoT), and reviewing the challenges which may complicate the process of systematic validation of electronic evidence. The study further explores various solutions previously proposed, by researchers and academics, regarding their appropriateness based on their experimental evaluation. Additionally, this article suggests open research areas, highlighting many of the issues and problems associated with the empirical evaluation of these solutions for immediate attention by researchers and practitioners. Notably, academics must react to these challenges with appropriate emphasis on methodical verification. Therefore, for this purpose, the issues in the experiential validation of practices currently available are reviewed in this study. The review also discusses the struggle involved in demonstrating the reliability and validity of these approaches with contemporary evaluation methods. Furthermore, the development of best practices, reliable tools and the formulation of formal testing methods for digital forensic techniques are highlighted which could be extremely useful and of immense value to improve the trustworthiness of electronic evidence in legal proceedings.

• Asian Journal of Atmospheric Environment
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• v.8 no.1
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• pp.48-58
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• 2014

Energy efficiency is vital to improve energy security, environmental and social sustainability, and economic performance. Improved energy efficiency also mitigates climate change by lowering greenhouse gas (GHG) emissions. Buildings are the single largest industrial consumer of energy and are therefore key to understanding and analyzing energy consumption patterns and the opportunities for saving energy at the district level in urban environments. This study focused on two representative boroughs in the major metropolitan area of Seoul, South Korea as a case study: Gandong-gu, a typical residential district, and Jung-gu, a typical commercial district. The sources of the energy supplied to the boroughs were determined and consumption patterns in different industry sectors in Seoul used to identify current patterns of energy consumption. The study analyzed the energy consumption patterns for five different building categories and four different sectors in the building using a bottom-up energy modeling approach. Electricity and gas consumption patterns were recorded for different building categories and monthly ambient temperatures in the two boroughs. Finally, a logarithmic equation was developed to describe the correlation between commercial activity and cooling energy intensity in Jung-gu, the commercial district. Based on these results, recommendations are made regarding the current energy consumption patterns at the district level and government energy policies are suggested to reduce energy consumption and, hence, greenhouse gas emissions, in both commercial and residential buildings.

• International Commerce and Information Review
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• v.16 no.5
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• pp.3-25
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• 2014

The megatrends of the Korean distribution industry market in 2014 reflect opportunities in parallel import & overseas direct purchase. Korean government addressed that "Monopoly & Oligopoly consumer goods import improvement plan" to stabilizing importing goods prices and domestic consumers' burden relief through accelerating market competition. and moreover it is to improving distribution channel and promoting parallel import market business. The Korean market is very unique in that consumers' real sensory index of open up importation effect level is low, but nominal open up importation effect level is high. This is due to difficulties in creating a proper importing goods distribution market and alternative importing routes are very rare. Thus, the purpose of this study is to analyze the market situation and parallel import to improve Korean government's "Monopoly & Oligopoly consumer goods import improvement plan" policy for the revitalization of the domestic market economy and to boost up a new growth engine industry.

• Journal of the Economic Geographical Society of Korea
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• v.15 no.3
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• pp.376-389
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• 2012

Ethnic entrepreneurship, an important means by which immigrants improve economic status, is widely believed to be facilitated by their residential concentration, i.e. ethnic enclaves. However, the recent immigrants' residential dispersion and re-clustering in some selected well-to-do suburbs portend changes in the role of ethnic enclave as a nest of immigrant entrepreneurship. This paper investigates the impacts of the residential dispersal on ethnic entrepreneurship with a case study of Korean small businessmen in Chicago, Illinois PMSA. The research utilizes the Public Use Microdata Sample (PUMS) to know the overall changes in Korean entrepreneurship through 1990s and conducts a survey to understand reactions and surviving strategies of Korean enclave businessmen to the residential shifts. Relevant to those analyses is the enclave-economy hypothesis which argues benefit from spatial clustering of co-ethnic entrepreneurs by yielding more business opportunities and higher returns.

• The Korean Journal of Food And Nutrition
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• v.19 no.4
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• pp.416-426
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• 2006

The purpose of the study was to investigate the perception and preference of chungkukjang in the middle school students under school meal service. For the investigation, 538 third-grade students in Seoul area were surveyed by a questionnaire and the data were analyzed by the SAS package. The result showed that 81.3% of the surveyed students responded the awareness of chungkukjang, and the motives of their interest in chungkukjang were through home education(60.0%) and mass communication(30.9%). Most students recognized that chungkukjang is the soybean fermented food, healthy food and Korean traditional food. 33.8% of students responded that chungkukjang jjigae served at the school meal service was not tasty. It also revealed that male students had more preference for chungkukjang jjigae than female students. Among the 22 kinds of new chungkukjang menu served at the school meal service in the future, 10 kinds of menu (chungkukjang samgeobsal gui, samgeobsal chungkukjang bockum, chungkukjang sauce dakk gui, chungkukjang dongasmali, chungkukjang sogogi janggug, chungkukjang kimchi bokgumbab, chungkukjang bajirak kalguksu, chungkukjang kimchi buchim, chungkukjang sangsun gut, chungkukjang bibimbab) were highly preferred foods by male students. Therefore, in order to make middle school students take the chungkukjang foods with pride by increasing their perception and knowledge of them, the family should give them many opportunities to eat chungkukjang foods. The school also should try to use more chungkukjang foods in the school meal service, and try to improve in cooking process to make more tasty chungkukjang foods fur teenagers.

• Journal of Korea Port Economic Association
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• v.31 no.3
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• pp.75-91
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• 2015

This study aims to assess the competitiveness of 30 logistics centers that operate in the hinterland of the North Container Port at Busan New Port. Thirty-two key factors were selected from previous studies to analyze and improve competitiveness and expand business opportunities in the hinterland. Suggestions from logistics experts were also canvassed. These variables were then put through first- and second-factor analysis to verify validity and measure confidence levels; they were later categorized into five factors and 15 sub-factors impacting on competitiveness. The categorized factors were compared using the analytic hierarchy process (AHP) to assess the importance of each factor and sub-factor in the case of logistics centers in the North Container hinterland of Busan New Port. The findings indicate that factors related to the securing of significant amounts of container cargoes were of greater importance. On the other hand, relatively basic factors proved to be less important in improving the competitiveness of the port hinterland.

• Korean Journal of Health Education and Promotion
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• v.23 no.1
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• pp.1-22
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• 2006

Objecive and Method: Smoking among health professionals has been shown to influence smoking related knowledge, attitude and educational practices in medical setting. And lack of health professionals' efficacy for smoking cessation intervention has been a major barrier to education on smoking too. In this regard, the present study was carried out to introduce and discuss the advanced cases of smoking cessation education for health professionals, and to develop theory-based educational models of smoking cessation for health professionals in order to improve the effectiveness and efficiency of intervention on smoking in a medical framework. Results: First, major issues of health professionals' smoking cessation intervention were discussed. Discussed issues were smoking prevalence among health professionals, importance of health professionals' roles both as health educators and examples, and health professionals' cognitive dissonance. As advanced cases of smoking cessation education for health professionals, ATOD(Alcohol, Tabacco, and Other Drug problem prevention) developed by US Department of Health & Human Services and the Rx for Change curriculum in California State were discussed. Finally, smoking cessation educational models for health professionals were developed on the basis of social cognitive model and TPB/TTM. Conclusions: For the effective and efficient smoking cessation intervention in medical setting, systematic efforts would be necessary to provide opportunities for ensuring the qualification of health professionals on smoking cessation through an analysis of major issues concerning smoking cessation education for health professional and the development of comprehensive curriculum for smoking cessation.

• The Journal of Society for e-Business Studies
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• v.15 no.4
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• pp.303-317
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• 2010

In this paper, we propose a novel approach to fault prediction for real-time business process monitoring method using extended KNN imputation based LOF prediction. Existing rule-based approaches to process monitoring has some limitations like late alarm for fault occurrence or no indicators about real-time progress, since there exist unobserved attributes according to the monitoring phase during process executions. To improve these limitations, we propose an algorithm for LOF prediction by adopting the imputation method to assume unobserved attributes. LOF of ongoing instance is calculated by assuming next probable progresses after the monitoring phase, which is conducted during entire monitoring phases so that we can predict the abnormal termination of the ongoing instance. By visualizing the real-time progress in terms of the probability on abnormal termination, we can provide more proactive operations to opportunities or risks during the real-time monitoring.

• School Mathematics
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• v.19 no.4
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• pp.663-690
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• 2017

The aim of this study is to look into the meaning and sub-factors of spatial orientation, compare and analyze mathematics curriculums and textbooks of several countries with respect to spatial orientation and offer suggestions to improve teaching spatial orientation in elementary school mathematics in Korea. In order to attain these purposes, this study examined the meaning and sub-factors of spatial orientation through the theoretical consideration regarding various studies on spatial sense. Based on such examination, this study compared and analyzed mathematics curriculums and textbooks used in South Korea, Singapore, Japan, China, Hong Kong, Finland, United States of America, and Germany with respect to contents of mathematics curriculum and textbooks in grades, sub-factors of spatial orientation, and contexts for spatial orientation. In the light of such theoretical consideration and analytical results, this study provided suggestions for improving teaching spatial orientation in elementary schools in Korea as follows: extending content of spatial orientation in mathematics curriculum, emphasizing spatial orientation across the several grades, especially in the upper grades, providing opportunities to learn the sub-factors of location, direction, coordinates, route, and distance variously, and utilizing various familiar and realistic contexts in the world around students.