• Title/Summary/Keyword: Technical Level

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DDoS detection method based on the technical analysis used in the stock market (주식시장 기술 분석 기법을 활용한 DDoS 탐지 방법)

  • Yun, Jung-Hoon;Chong, Song
    • 한국정보통신설비학회:학술대회논문집
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    • 2009.08a
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    • pp.127-130
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    • 2009
  • We propose a method for detecting DDoS (Distributed Denial of Service) traffic in real-time inside the backbone network. For this purpose, we borrow the concepts of MACD (Moving Average Convergence Divergence) and RoC (Rate of Change), which are used for technical analysis in the stock market Due to the fact that the method is based on a quantitative, rather than a heuristic, detection level, DDoS traffic can be detected with greater accuracy (by reducing the false alarm ratio). Through simulation results, we show how the detection level is determined and demonstrate how much the accuracy of detection is enhanced.

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Effect of Beating Time and Fines Content on the Drainage Properties of BKP (고해처리와 미세분 함량에 따른 BKP의 탈수특성변화)

  • 성용주;이학래
    • Journal of Korea Technical Association of The Pulp and Paper Industry
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    • v.31 no.1
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    • pp.52-60
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    • 1999
  • Drainage rate in wet-end, which has significant influences on the production capacity, product quality and process economics in papermaking, becomes an important factor in the modern high speed papermaking processes owing to increased level of fines contained in today's pulp materials and increased papermaking system closure. A study was carred out to investigate the influence of beating and fines content on natural and vacuum dewatering using a vacuum drainage tester. Increase in beating and accumulation of fines in the stock decreased natural dewatering, Vacuum dewatering effect, however, increased substantially as beating and fines content were increased. But this increase in vacuum dewatering decreased again when a stock is severely beaten or fines content is greater than 35%. Above this level of fines content, mobile fines migrates to the interstices of the forming web to cause sealing or plugging which restrict fluid movement through the web.

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Printability Improvement of Hanji (한지의 인쇄적성 향상)

  • Hyun Kyung-Su;Kim Min-Jung;Lee Myoung-Ku
    • Journal of Korea Technical Association of The Pulp and Paper Industry
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    • v.37 no.4 s.112
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    • pp.52-59
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    • 2005
  • Most of printing paper market today have been occupied by western paper and some machine-made Hanji used don't show the characteristic advantages for traditional hand-made Hanji. Although hand-made Hanji has an aesthetic and qualitative value, it has limited uses because of poor printability as printing paper. Unlike western paper, conventional Hanji cannot be used as Printing paper because it is impossible to make the clear formation of printed dot and to develop a high level of sizing and picking problem occurs during printing. Improvements of physical and optical properties such as roughness, smoothness, air permeability, contact angle, opacity, and paper gloss as well as sizing level were accomplished through internal and surface sizing and calendering, which made the paper better suited for printing and decreased problems during printing.

Sulfide-rich mine tailings usage for short-term support purposes: An experimental study on paste backfill barricades

  • Komurlu, Eren;Kesimal, Ayhan
    • Geomechanics and Engineering
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    • v.9 no.2
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    • pp.195-205
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    • 2015
  • Barricade failures generally occur at the early times of paste backfill when it is fresh in the stopes. The backfill strength increases and need for barricading pressure decreases as a result of the hydration reactions. In this study, paste backfill barricades of Cayeli copper mine were investigated to design cemented mineral processing plant tailings as barricade body concrete. Paste backfill in sub-level caving stopes of the mine needs to be barricaded for only four or five days. Therefore, short term strength and workability tests were applied on several cemented tailings material designs. Barricade failure mechanisms, important points of barricade designing and details of the new concrete material are explained in this work. According to the results obtained with this experimental study, the tailings were assessed to be used in concrete applied as temporary supports such as cemented paste backfill barricades.

Evaluating the Mechanical Properties of Fiber Yarns for Developing Synthetic Fiber Chains

  • Kim, Kyeongsoo;Kim, Taewan;Kim, Namhun;Kim, Dokyoun;Kang, Yongjun;Kim, Seonjin
    • Journal of Ocean Engineering and Technology
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    • v.35 no.6
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    • pp.426-433
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    • 2021
  • In this study, three types of synthetic fiber materials were evaluated, namely, DM20, SK78, and T147, to replace steel chains in shipbuilding and offshore fields with fiber chains as there is increasing demand for chains with lighter weights and improved usabilities. The strength and quasi-static stiffness were analyzed to select suitable yarns for the fiber chains. The durability of the yarn was evaluated by performing a 3-T (time to rupture) test as a specific tension level. The results of the experiment revealed excellent dynamic stiffness in DM20 and highest values of the windward and leeward stiffness in T147. 3-T linear design characteristic curves for a specific tension level were derived for the three types of fiber materials. The findings of this study can provide insights for improving strength and durability in fiber chain design.

E-Safety Awareness of Saudi Youths: A Comparative Study and Recommendations

  • Alharbi, Nawaf F;Soh, Ben;AlZain, Mohammed A;Alharbi, Mawaddah F
    • International Journal of Computer Science & Network Security
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    • v.21 no.11
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    • pp.181-188
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    • 2021
  • The use of the internet has become a basic need for many across the globe. The situation is very much the same for the youth in many countries like Saudi Arabia who have grown up surrounded and accessing the internet. This demographic, however, is at an increased risk of falling as victims to cybercrime because of a low level of technical awareness. This review looks at the level of technical awareness of internet use in 3 different countries which include the USA, South Africa, and New Zealand. The review will compare the situation in these nations with those in KSA. Based on the review and comparisons, recommendations are made for culturally and socially acceptable e-Safety awareness of Saudi youths.

A survey of Specialists Cognition on Authorization of Credits for the Same Subjects in Entering a Same Department of the College Among Technical High School Graduates (공업고등학교 졸업생의 대학 동일계 학과 진학시 동일 과목 학점 인정에 관한 전문가 인식 조사)

  • Lee, Sang Hyuk;Kim, Ho Dong
    • 대한공업교육학회지
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    • v.33 no.2
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    • pp.26-43
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    • 2008
  • The purpose of this study is to survey of specialists cognition to authorize credits for the same subjects in entering a department of the same area in college among technical high school graduates. Today with generalized college education, about 80% of technical high school graduates enter college. Therefore, authorization of credits for the same subjects is necessary to reduce educational waste in terms of articulation among technical high schools, junior colleges and universities. In this study, a survey was conducted with 100 specialists in technical education, including technical high school teachers, researchers, and professors at junior college or technical college in university, getting answers from 84 subjects (81.25%). The results of this research can be summarized as follows: First, it is valid to authorize credits for all practical subjects completed in technical high school when technical high school graduates enter the same department at college but most of junior college professor unsuitable response. Second, it is valid to authorize credits through its own prescribed test for the same subjects when technical high school graduates enter the same department of engineering at junior college or technical college in university but opposed 62.5% of junior college professor. Third, it is most of respondent valid to authorize credits for the same subjects if results of its own examination for authorization by university are at a fixed level or higher when technical high school graduates are admitted as a junior at the same department in technical college of university after graduation from the same department at junior college.

A Study on the Elevation of Software Process Level and Performance through Software Process Improvement (소프트웨어 프로세스 개선을 통한 프로세스 수준과 성과 향상 방안)

  • Moon Song-Chul;Kim Hyun-Soo
    • The KIPS Transactions:PartD
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    • v.13D no.1 s.104
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    • pp.75-86
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    • 2006
  • This paper studied the improvement of software process of the software firms. Software process infrastructure level of software process is very important. This study provided that software process infrastructure have an significant influence on the process level, process infrastructure management level, and software process performance. The result showed that software process high level is elevated through management activity of organization infrastructure and technical infrastructure. And organization performance is elevated through fit between process level and quality culture of software process. Problem factors of software process infrastructure improvement is lack of process improvement mind, leadership and investment. Therefore software firms must construct process improvement through supporting of process quality mind and investment with process infrastructure improvement.