• Proceedings of the Korea Information Processing Society Conference
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• 2007.11a
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• pp.1238-1241
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• 2007

웹 게시판 서비스에서의 비정상행위 탐지 및 블러킹 방안 제시는 서비스를 제공하는 주체에게는 대량의 광고성 게시글로부터 안정적 서비스 운영이 가능하게끔 하고, 서비스를 이용하는 사용자에게는 원하지 않는 게시글로부터 블러킹 방안을 제공 받아 깨끗한 웹 게시판 서비스를 가능한 방안으로 인터넷 환경이 제공되면서 필터링 기술 발전 수준이 가장 높은 스팸 메일 필터링 기술을 응용하여 웹 게시판 서비스에 적용하여 필터링 효과 수준을 측정하고 다른 웹 서비스 등에 활용할 수 있는 방안을 제시한다.

• Proceedings of the Korea Information Processing Society Conference
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• 2007.11a
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• pp.1222-1225
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• 2007

보안수준 평가 및 개선에 있어서 온라인 웹사이트 응용프로그램의 경우 측정 기준 설정과 보안 수준 표시에 많은 어려운 점이 있다. 이에 모토롤라부터 도입한 경영혁신 도구로서의 6 시그마 수준 표현 및 개선 기법을 웹사이트 보안수준 평가에 적용할 수 있도록, WASC(Web Application Security Consortium)에서 제공하고 있는 웹 애플리케이션 보안 평가 체크리스트를 사용하여 Bottom-Up 방식으로 웹 사이트에 대한 실제 침해 시도의 결과를 측정, 이를 보안수준 측정 및 개선에 활용할 수 있는 방안을 제시한다.

• Journal of the Korea Society of Computer and Information
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• v.24 no.6
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• pp.89-97
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• 2019

This study proposes a method for investigating current patents related to information communication technology and smart mobility to provide insights into future technology trends. The method is based on text mining clustering analysis. The method consists of two stages, which are data preparation and clustering analysis, respectively. In the first stage, tokenizing, filtering, stemming, and feature selection are implemented to transform the data into a usable format (structured data) and to extract useful information for the next stage. In the second stage, the structured data is partitioned into groups. The K-medoids algorithm is selected over the K-means algorithm for this analysis owing to its advantages in dealing with noise and outliers. The results of the analysis indicate that most current patents focus mainly on smart connectivity and smart guide systems, which play a major role in the development of smart mobility.

• Proceedings of the KIPE Conference
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• 2020.08a
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• pp.196-198
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• 2020

본 논문은 SiC MOSFET의 단락 검출을 위한 고정밀 Rogowski 코일 회로 설계 방법을 제안한다. 설계 방법을 제안하기 위해 먼저 Rogowski 코일의 기본 구성인 적분기를 실제 시스템 요구 사양에 맞추어 설계한다. 설계한 회로의 성능 확인을 위하여 DPT (double pulse test)를 실시하며, test 결과 분석을 통해 문제점을 파악하고 전류 센싱 정밀도 향상을 위해 입출력 필터 설계 및 Rogowski 코일 턴 수를 변경한다. 변경한 각 조건들에 대하여 DPT를 진행하고 각 test 결과를 기반으로 Rogowski 코일 회로 설계 방안을 제안한다.

• Journal of the Semiconductor & Display Technology
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• v.22 no.3
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• pp.73-77
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• 2023

As the DeFi market continues to expand, fraudulent activities using smart contracts have also increased. HoneyPot and Ponzi schemes are well-known frauds that exploit smart contracts. While several studies have demonstrated the potential to detect smart contracts implementing these scams, there has been a lack of research focusing on simultaneously detecting both types of fraud. This paper addresses this gap by harnessing artificial intelligence to conduct experiments for the detection of both HoneyPot and Ponzi schemes. The study employs the CNN (Convolutional Neural Network) model, commonly used for malware detection. To effectively utilize CNN, the bytecode of smart contracts is transformed into visual representations. The experimental results showcase a recall rate of 0.89 and an F1 score of 0.85, indicating promising detection capabilities.

• International Commerce and Information Review
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• v.19 no.3
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• pp.177-193
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• 2017

In the global management environment, having trade talents can determine export competitiveness. Therefore, most of countries are carrying out various educational programs to be able cultivate or educate outstanding trade talents. South Korea is no exception. It is carrying out various educational programs such as GTEP, Glocal Trade Experts Incubating Program. Based on GTEP, this study would like to investigate empirical relationships between education service quality and international intention. As a result, all of education service quality such as educators' quality, educational infra quality, and education quality are significantly related to educational satisfaction and international intention. These results imply that improving educational service quality is better than carrying out education programs simply for cultivating outstanding trade talents.

• Restorative Dentistry and Endodontics
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• v.42 no.3
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• pp.216-223
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• 2017

Objectives: The aim of this study was to compare the mechanical properties of various nickel-titanium (NiTi) files with similar tapers and cross-sectional areas depending on whether they were surface-treated. Materials and Methods: Three NiTi file systems with a similar convex triangular cross-section and the same ISO #25 tip size were selected for this study: G6 (G6), ProTaper Universal (PTU), and Dia-PT (DPT). To test torsional resistance, 5 mm of the straightened file's tip was fixed between polycarbonate blocks (n = 15/group) and continuous clockwise rotation until fracture was conducted using a customized device. To evaluate cyclic fatigue resistance, files were rotated in an artificial curved canal until fracture in a dynamic mode (n = 15/group). The torsional data were analyzed using 1-way analysis of variance and the Tukey post-hoc comparison test, while the cyclic fatigue data were analyzed using the Mann-Whitney U test at a significance level of 95%. Results: PTU showed significantly greater toughness, followed by DPT and G6 (p < 0.05). G6 showed the lowest resistance in ultimate torsional strength, while it showed a higher fracture angle than the other files (p < 0.05). In the cyclic fatigue test, DPT showed a significantly higher number of cycles to failure than PTU or G6 (p < 0.05). Conclusions: Within the limitations of this study, it can be concluded that the torsional resistance of NiTi files was affected by the cross-sectional area, while the cyclic fatigue resistance of NiTi files was influenced by the surface treatment.

• Journal of the Korean Society of Physical Medicine
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• v.5 no.2
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• pp.165-172
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• 2010

Purpose : The purpose of this study was to investigate curriculums of physical therapy education. Methods : We identified the curriculums of physical therapy education by internet. Results : In Korea, education on physical therapy started as a two-year program in 1963, and recently reorganized as three or four years programs. Currently some ten schools offer physical therapy programs for master's and doctor's degrees. The member countries of the World Confederation for Physical Therapy (WCPT) provide approximately ten types of education programs that take two to six years. In Korea, the same programs have three or four years of education periods. The American Physical Therapist Association (APTA) launched on the doctor of physical therapy (DPT) course in the late 1990s, encouraging physical therapists to acquire a doctorate degree. In addition, the U.S. Vision 2020 envisions that all physical therapists acquire DPT by the year 2020. As the medical field becomes more professional and specialized, physical therapists are expected to supplement and even replace works of doctors, instead of merely assisting them. It is necessary to reinforce education programs and improve related school systems to enhance status of physical therapist in accordance with the changing social needs and to provide quality service to patients. Conclusion : We suggest to change the curriculum of Korea. It is more accurately reflected the scope, depth, breadth, and rigor of the high-quality education preparation needed for current and future practice.

• KSII Transactions on Internet and Information Systems (TIIS)
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• v.8 no.9
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• pp.3159-3176
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• 2014

This work presents an analysis of the buffer features of an access router, especially the size, the impact on delay and the packet loss rate. In particular, we study how these features can affect the Quality of Service (QoS) of multimedia applications when generating traffic bursts in local networks. First, we show how in a typical SME (Small and Medium Enterprise) network in which several multimedia flows (VoIP, videoconferencing and video surveillance) share access, the upgrade of the bandwidth of the internal network may cause the appearance of a significant amount of packet loss caused by buffer overflow. Secondly, the study shows that the bursty nature of the traffic in some applications traffic (video surveillance) may impair their QoS and that of other services (VoIP and videoconferencing), especially when a certain number of bursts overlap. Various tests have been developed with the aim of characterizing the problems that may appear when network capacity is increased in these scenarios. In some cases, especially when applications generating bursty traffic are present, increasing the network speed may lead to a deterioration in the quality. It has been found that the cause of this quality degradation is buffer overflow, which depends on the bandwidth relationship between the access and the internal networks. Besides, it has been necessary to describe the packet loss distribution by means of a histogram since, although most of the communications present good QoS results, a few of them have worse outcomes. Finally, in order to complete the study we present the MOS results for VoIP calculated from the delay and packet loss rate.

• Journal of the Korea Organic Resources Recycling Association
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• v.13 no.3
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• pp.105-118
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• 2005

This study examined the improvements of existing food waste statistics system using a sample survey, which estimated the total food waste generation in 4 areas(High, Middle, Middle and Low, and Low population density), and a survey, which was aimed at forming a basis for modeling 112 local governments, were conducted. Currently, the methods for collecting the statistical data are summarized as five types. In high population density areas, the type based on examining the recycling facilities was found to be a more general way of estimating population centers higher than low population density areas. It was found that numerous low population density areas estimated their food waste production according to its generation per capita. It was also found that the findings of sample survey were 10%~40% higher than the existing statistical data and Non-separated collected food waste appears to be the main factor.