Earticle

Since the separation of the control plane and the data plane for Software-Defined Networking (SDN) leads to more and more security threats on the control plane and the SDN controllers, issues related to threat detection and defense of SDN must be seriously considered. This paper tries to introduce Extenics into the research on threat detection and defense of SDN and proposes an extension approach from a formal viewpoint. It first uses the matter-elements and the composite-elements to formally represent four security-related roles of SDN. It then utilizes the extension theory and basic-elements, by applying the dependent function to threat detection of SDN and making use of the affair-elements to formalize the NETCONF operations for threat defense of SDN. Finally, case study validates the feasibility of proposed extension approach in promoting the formalization of not only the security-related roles of SDN but also threat detection and defense of SDN.

The excessive vibration of motor support in container crane’s machine room affects lifespan of the structure and driving comfort of the operators. According to the result of the vibration site test, the main causes of the machine room vibration in container crane were found out. In order to reduce the vibration response, based on simplifying the system as a single degree of freedom vibration system model and finite element method, two kinds of rapid vibration analysis software were compiled respectively by using Visual Basic (VB), which can parameterize the motor and its support. Meanwhile, their advantages and disadvantages were compared. By analyzing the effects of different motor support structure layouts on its natural frequency and maximum vibration velocity response, it is concluded that increasing and improving the motor support’s cross-sectional moment of inertia and lateral stiffness can reduce the system vibration response. The rapid analysis software’s computing results are almost the same as ANSYS computing results. Furthermore, motor support structure of the container crane machine room was optimized through the original software. The accordance of vibration test data and analysis results prove the credibility and the reliability of the rapid analysis software and methods.

This paper describes a new basic element which shows a synaptic operation for neural logic applications and shows function feasibility. A key device for the logic operation is the insulated-gate pn-junction device on SOI substrates. The basic element allows an interface quite compatible to that of conventional CMOS circuits and vMOS circuits.

Self Piercing Resistance Element Welding (SPREW) is a dissimilar welding process based on resistance spot welding, using a steel rivet. This method employs a steel rivet to pierce the aluminum sheet under a piercing current, then a welding current is conducted to weld the rivet to the steel sheet. Previous studies have focused on relatively thin aluminum sheets (≤1.5 mm), and research on thicker aluminum sheets has rarely been attempted. In this study, the SPREW process was applied to join a 2.4 mm-thick aluminum alloy (Al6451) and a 1.0 mm-thick galvanized high-strength steel (GA-980). By varying the piercing current, piercing time, cooling time, welding current, and welding force, tensile load and fracture mode were evaluated. The best joint performance-a maximum tensile load of 6.38 kN with button fracture-was achieved at 2 kA, 6 s, 10 s, 10 kA, and 4.4 kN, respectively.

字素为既有独立的形音义，又能够构字的最小单位。本篇论文，首先对‘韩国语·文学会’所主管的《汉子能力鉴定考试》一级测试的3500个汉字进行了全面分析和统辑工作，由此得出了其字素之数量以及这些字素的使用频率等研究资料。这些努力可以期待能使广大群众对汉字的理解和学习变得更方便，更容易的效果。统计结果证明《汉字能力鉴定考试》一级所考的3500个汉字就是由782 个字素结合的。 可是，这些分解构字字素而出来的结果，由于如何定其标准就容易发生一些出入。于是，如果想为汉字学打好良好的基础，那么首先得确定好字素的定义、制定符合于现代楷书构型规律的字素，树立好这些字素的运用标准。 现在笔者所提的方案和建议只不过是开始而已。以后还要作不懈努力，研究和制定出能够正确地分解汉字构字成分，又能得到众人所认的可靠标准来才行。

This paper describes on the basic study for the insulation design of vacuum interrupter using Finite Element Method. For the basic study of insulation design, first, the maximum electric field was calculated on each curvature radius of arc shield and electrode. Second, the maximum electric field was also calculated on applied voltage and end shield with or not. Thus, the maximum electric field calculated have an effect on curvature radius and voltage polarity.

초등학교 교과서에 사용된 어휘의 수준을 보기 위해 교과서에 쓰인 어휘의 사용 빈도를 포함하여 결정에 영향력을 미칠 요소를 파악하고 요소간의 관계를 설립하여 교육용 어휘 설정의 나아갈 방향을 제시하는데 목적이 있다. 7차 교육과정에 있는 초등학교 교과서에서 국어 어휘 교육 관련 항목을 살펴 이들의 단계별 학습 수준의 고려가 이루어져 있는지를 검토하고자 한다. 수준별 교육 과정에서 밝히고 있는 어휘 의미 교육의 위계가 세부적이고 치밀한 수준의 적정성을 바탕으로 하여 구성되어 있는지를 검토하고 초등학교 교육용 어휘 선정의 문제 분석을 통해 기본 어휘와 기초 어휘 분류의 적정 기준과 학습 활동에 있어 언어 사용 능력으로서의 어휘력과 언어 체계 속의 어휘력을 구분할 필요가 있음을 설명하고자 한다.

본 연구는 그림책의 미적요소를 활용한 협동미술이 장애유아의 기초조형활동 및 소근육운동을 향상시키는지를 알아보는데 연구의 목적을 두었다. 연구대상은 J시에 위치한 B유치원에 재원중인 3명의 유아로 발달장애 남자 1명, 여자 2명이었다. 실험기간은 2016년 4월부터 12월까지 회기 50분씩 총 14회기로 구성하였다. 그림책의 미적요소를 활용한 협동미술활동 측정도구는 기초조형활동과 소근육운동 척도를 사용하였으며, 수집된 자료는 요인별로 사전검사와 사후검사 점수화하여 차이를 비교하였다 연구 분석 결과 첫째, 장애유아 3명의 기초조형활동을 증진시키는데 유의미한 효과가 있었다. 둘째, 장애유아 3명의 소근육운동 향상시키는데 유의미한 효과가 있었다. 본 연구의 의의, 제한점, 후속연구 문제 등이 논의되었다.

The purpose of this study was to investigate whether cooperative art using the aesthetic elements of picture books improves the basic formative activity and fine motor skills of children with disabilities. The subjects of this study were three children including a male and two females who were attending B kindergarten located in J city, and the experimental period consisted of 14 sessions with 50 minutes per session between April to December 2016. The tools used to measure the cooperative art activity using the aesthetic elements of picture books were basic formative activity and fine motor skills scales, and as for the collected data, this study analyzed the effect of the experimental treatment through the corresponding sample t-test by scoring the pre-test and post-test results for each factor. From the results of the analysis, first, there was a significant effect in promoting the basic formative activity of three children with disabilities. Second, there was a significant effect on improving fine motor skills in three children with disabilities. The significance, limitations, and subsequent research issues of this study were discussed.