• 제어로봇시스템학회논문지
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• 제20권6호
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• pp.606-611
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• 2014

The understanding of another's behavior is a fundamental cognitive ability for primates including humans. Recent neuro-physiological studies suggested that there is a direct matching algorithm from visual observation onto an individual's own motor repertories for interpreting cognitive ability. The mirror neurons are known as core regions and are handled as a functionality of intent recognition on the basis of imitative learning of an observed action which is acquired from visual-information of a goal-directed action. In this paper, we addressed previous works used to model the function and mechanisms of mirror neurons and proposed a computational model of a mirror neuron system which can be used in human-robot interaction environments. The major focus of the computation model is the reproduction of an individual's motor repertory with different embodiments. The model's aim is the design of a continuous process which combines sensory evidence, prior task knowledge and a goal-directed matching of action observation and execution. We also propose a biologically inspired plausible equation model.

• Nuclear Engineering and Technology
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• 제44권4호
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• pp.379-386
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• 2012

A symptom-based procedure with a critical safety function monitoring system has been established to reduce the operator's diagnosis and cognitive burden since the Three-Mile Island (TMI) accident. However, it has been reported that a symptom-based procedure also requires an operator's cognitive efforts to cope with off-normal events. This can be caused by mismatches between a static model, an emergency operating procedure (EOP), and a dynamic process, the nature of an ongoing situation. The purpose of this study is to share the evidence of mismatches that may result in an excessive cognitive burden in conducting EOPs. For this purpose, we analyzed simulated emergency operation records and observed some operator behaviors during the EOP operation: continuous steps, improper description, parameter check at a fixed time, decision by information previously obtained, execution complexity, operation by the operator's knowledge, notes and cautions, and a foldout page. Since observations in this study are comparable to the results of an existing study, it is expected that the operational behaviors observed in this study are generic features of operators who have to cope with a dynamic situation using a static procedure.

• 대한조선학회논문집
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• 제55권2호
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• pp.116-123
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• 2018

These days, geographic information system has released in everyday life and industries. However, the shipyard only uses it to manage the layout of the yard. In this study, we apply the Geographic Information System to shipbuilding block logistics simulation to analyse the behavior of bogies and forklifts carrying blocks and materials in the shipyard. The shipyard manages daily block logistics plans at the execution planning stage. However, since it is a daily plan, it is difficult to respond to an unexpected situation immediately, and application to judge a certain value or higher value is insufficient. Therefore, a simulation model was created using the shape and attribute information inherent in the geographic information system to verify and improve the block logistics of the mid-and long-term yards. Through this simulation model, we will analyse loads on the workplace, stockyard, and road, and contribute to overall logistics improvement from the point of view of resource planning. In addition, the results of the simulation are reflected in the planning, to help support various decisions.

• 한국환경교육학회지:환경교육
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• 제18권1호
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• pp.44-54
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• 2005

This study is intended to examine an effectiveness of STS module concerning food waste, 'Even if food waste is the money, would you throw it away', in the areas of affective domains related to science and attitudes towards environmental problems. For this study, one group of 142 seventh graders attending 'L' middle school in Iksan city, Jeonrabukdo received 8 class hours with this module. Their affective domains related to science and attitudes towards environmental problems were measured by pre- and post-test design in a single group. In addition, their views on STS instruction was also analyzed. Results are as follows. Students in the transition period who had been taught with this module showed that they had a statistically significant effectiveness in interests related to science, scientific attitudes and execution towards environmental problems(p<.05). Students taught with this module had a positive views on the STS instructional methods or contents. It was also shown that their recognition or behavior towards environmental problems have been changed positively.

• 한국정보통신학회:학술대회논문집
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• 한국정보통신학회 2017년도 춘계학술대회
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• pp.434-437
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• 2017

1986년에 최초의 악성코드인 브레인 바이러스가 발견된 이후 현재까지 다양한 종류의 악성코드가 만들어졌고 대표적으로 웜, 드로퍼, 트로젠, 백도어, 루트킷, 다운로더, 스파이웨어 등이 있다. 특히 최근에는 드라이버 형식의 악성코드가 나타남에 따라 악성코드 분석이 더욱 어려워졌다. 따라서 악성코드 분석가는 상당한 실력이 요구된다. 악성코드를 잘 분석하기 위해서는 동작 원리를 알아야 하고 이는 직접 개발을 해봐야 한다. 본 논문에서는 드로퍼, 백도어, 트로젠, 루트킷, 드라이버를 실전에 유포되는 악성코드와 유사하게 개발하고 가상 환경을 구축한 시스템에서 실행 동작을 보인다. 그리고 정적 분석과 동적 분석으로 악성코드를 빠르고 효과적으로 분석하기 위한 방법을 제안한다.

• Wind and Structures
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• 제22권6호
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• pp.617-633
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• 2016

In this paper, the analysis of hyperbolic cooling tower on elastic subsoil exposed to unsymmetrical wind loading is presented. Modified Vlasov foundation model is used to determine the soil parameters as a function of vertical deformation profile within subsoil. The iterative parameter updating procedure involves the use of Open Application Programming Interface (OAPI) feature of SAP2000 to provide two way data flow during execution. A computing tool coded in MATLAB employing OAPI is used to perform the analysis of hyperbolic cooling tower with supporting columns over a hollow annular raft founded on elastic subsoil. The analysis of such complex soil-structure system is investigated under self-weight and unsymmetrical wind load. The response of the cooling tower on elastic subsoil is compared with that of a tower that its supporting raft foundation is treated as fixed at the base. The results show that the effect of subsoil on the behavior of cooling tower is considerable at the top and bottom of the wall as well as supporting columns and raft foundation. The application of a full-size cooling tower has demonstrated that the procedure is simple, fast and can easily be implemented in practice.

• 동아시아경상학회지
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• 제9권4호
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• pp.57-67
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• 2021

Purpose - The corporate culture's energy is recognized to go through the company and facilitate a new balance to realize success, which means that the culture in an environment of various organizations affects the performance of its employees. The purpose of the current research is to investigate the impact of organizational culture on employee performance. Research design, data, and methodology - The current research conducted a qualitative content analysis. The primary research approach applied by qualitative content analysis is an inductive methodology, and this approach is a type of reasoning that seeks the application of logic, which later helps develop a theory that will guide the future research. Result - Research findings of the present study indicated that five solutions to the problems encountered through the execution of culture are attached to how effective the organizational culture are when workers execute. Thus, culture is realized to boost structure, because the structure of an organization elevates the behavior of the organization. Conclusion - Workers will be aware of both the negative and positive implications of executing culture in the organization. Therefore, organization managers must learn that various employees are vital people in their vicinity, and creating a culture that would make a good rapport with them is vital.

• 정보보호학회논문지
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• 제29권2호
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• pp.431-438
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• 2019

파일리스 악성코드는 악성 행위를 수행할 페이로드의 흔적을 은닉하기 위해 메모리 주입 공격을 이용한다. 메모리 주입 공격 중 프로세스 할로윙이라는 이름의 공격은 시스템 프로세스 등을 일시정지 상태로 생성시킨 다음, 해당 프로세스에 악성 페이로드를 주입시켜 정상 프로세스인 것처럼 위장해 악성행위를 수행하는 방법이다. 본 논문은 프로세스 할로윙 공격이 발생했을 경우, 악성 행위 실제 수행 여부와 상관없이 메모리 주입 여부를 검출할 수 있는 방법을 제안한다. 메모리 주입이 의심되는 프로세스와 동일한 실행 조건을 갖는 복제 프로세스를 실행시키고, 각 프로세스 가상 메모리 영역에 속해있는 데이터 집합을 퍼지 해시를 이용해 비교한 다음 유사도를 산출한다.

• 한국정보통신학회:학술대회논문집
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• 한국정보통신학회 2014년도 추계학술대회
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• pp.346-349
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• 2014

현재 사이버 위협은 계속적으로 증대되고 있으며, 진화하는 악성코드에 의한 보안 사고의 피해도 점점 더 커져가고 있다. 또한 기존의 보안체계를 회피한 은밀한 악성코드 기반의 공격으로 기밀 데이터 및 개인정보 유출이 지속적으로 증가하는 추세이다. 그러나 기존의 블랙리스트 기반의 시그니처 탐지 기법으로는 진화된 "알려지지 않은 악성코드"의 대응에 한계가 있다. 본 연구에서는 인가된 프로그램의 위변조 여부, 인가된 프로그램의 실행여부, 운영체제 주요 파일에 대한 변경 여부 등 복합적인 분석을 통한 탐지 및 식별로 악성코드 행위를 차단하는 화이트리스트 기반 프로그램 실행 통제 방안을 제시하고자 한다.

• International Journal of Internet, Broadcasting and Communication
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• 제13권1호
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• pp.134-142
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• 2021

This paper proposes a probabilistic method in analyzing timing measurements to determine the periodicity of real-time tasks. The proposed method fills a gap in existing techniques, which either concentrate on the estimation of worst-case execution times, or do not consider the stochastic behavior of the real-time scheduler. Our method is based on the Z-test statistical analysis which calculates the probability of the measured period to fall within a user-defined standard deviation limit. The distribution of the measured period should satisfy two conditions: its center (statistical mean) should be equal to the scheduled period of the real-time task, and that it should be symmetrical with most of the samples focused on the center. To ensure that these requirements are met, a data adjustment process, which omits any outliers in the expense of accuracy, is presented. Then, the Z-score of the distribution according to the user-defined deviation limit provides a probability which determines the periodicity of the real-time task. Experiments are conducted to analyze the timing measurements of real-time tasks based on real-time Linux extensions of Xenomai and RT-Preempt. The results indicate that the proposed method is able to provide easier interpretation of the periodicity of real-time tasks which are valuable especially in comparing the performance of various real-time systems.