• Journal of the Korean Society of Systems Engineering
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• v.18 no.2
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• pp.126-139
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• 2022

The need for synthetic automation is increasing in preparation for a gradual decrease in laboratory research manpower due to low birth rate and aging. In this study, the existing laboratory synthesis method is analyzed based on the systems engineering technique. Then, it led to the derivation of the system requirements for a fixed-based robot manipulator capable of recognition, decision and control. The robot is equipped with replaceable modular end-effectors and designed depending on the purpose and process of the synthesis. The robot with an end-effector was implemented as PoC(Proof-of-Concept), and the functions for pipetting automation was verified.

• Proceedings of the KIPE Conference
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• 2020.08a
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• pp.239-241
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• 2020

MSIS(Modular Scalable Inverter System)에서 모터 구동 시 발생하는 고주파 성분의 순환 전류는 구동 시스템의 효율 및 신뢰성을 저하시키기 때문에, 이를 저감하기 위한 PWM(Pulse Width Modulation) 동기화 기법의 구현이 필수적으로 요구 된다. 본 논문은 MSIS에서 PWM 동기화 기법을 적용하기 위한 모터 구동 인버터용 제어보드의 설계에 관한 것이다. 제어보드 간 PWM 동기화 기법을 적용하기 위해 DSP(Digital Signal Processor)의 EPWMSYNC를 활용하였다. EPWMSYNC은 서로 다른 DSP간 PWM의 위상을 동기화하는 기능으로 DSP의 EPWMSYNCO과 EPWMSYNCI를 사용한다. 설계한 제어보드는 EPWMSYNC 신호를 광케이블을 통해 다른 제어보드로 연결할 수 있도록 설계하여, 제어보드 간의 절연과 잡음의 영향을 최소화했다. 본 논문에서 설계한 제어보드의 EPWMSYNC를 시험하였으며, 600W급 IPMSM(Interior Permanent Magnet Synchronous Motor)을 부하로 사용하는 시스템에서 설계된 제어보드의 유효성을 검증하였다.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.24 no.6
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• pp.1091-1102
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• 2014

The power analysis attack is a cryptanalytic technique to retrieve an user's secret key using the side-channel power leakage occurred during the execution of cryptographic algorithm embedded on a physical device. Especially, many power analysis attacks have targeted on an exponentiation algorithm which is composed of hundreds of squarings and multiplications and adopted in public key cryptosystem such as RSA. Recently, a new correlation power attack, which is tried when two modular multiplications have a same input, is proposed in order to recover secret key. In this paper, after reviewing the principle of side-channel attack based on input collisions in modular multiplications, we analyze the vulnerability of some exponentiation algorithms having regularity property. Furthermore, we present an improved exponentiation countermeasure to resist against the input collision-based CPA(Correlation Power Analysis) attack and existing side channel attacks and compare its security with other countermeasures.

• Journal of the Ergonomics Society of Korea
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• v.11 no.2
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• pp.15-21
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• 1992

This paper presents the ROBOT MODAPTS(Modular Arrangement of Predetermi- ned Time Standards) technique which can be applied to the robot motion analysis. Robot motions are easily divided into several movement activities and terminal activi- ties by means of the ROBOT MODAPTS technique Each link of robot arm is numbered such that finger is 1, hand is 2, elbow is 3, and so on. The robot motion time of each link is counted by multipling its given number to some time values observed at the finger movement. We can easily estimate robot teaching task time with this technique. This technique can be applied efficiently to establishing an adaptable robot motion ergonomically.

• Cartoon and Animation Studies
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• s.42
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• pp.241-262
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• 2016

British TV Channel 4 is one of the famous TV Channel in the world. Its station ID has also played a leading role in the developments of Motion Graphics including station IDs. This station ID's main visual design concept is its name and an iconic logo '4' at the same time. The first channel 4 station ID was designed by using modular typography to construct the iconic '4'. Modular typography is a technique of creating letters with similar elements. Channel 4's station ID was constructed from coloured polygons. The polygons split and converge at the same point in 3D space. Modularity in Channel 4's station ID is evidenced by the similar units of polygons. After the first station ID, Channel 4 was re-branded. Eventhough the station IDs which followed did not use coloured and geometrical polygons, modularity is seen in most of the station IDs especially between 2004 - 2011. In these station IDs, the iconic '4' is formed from similar natural and environmental objects like rocks, buildings, lights etc. In this analysis paper, there is a visual narrative on the history of Channel 4, the concept of modular typography in the original station ID and the application of modular typography in other Channel 4's station IDs.

• Journal of Digital Convergence
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• v.15 no.3
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• pp.181-186
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• 2017

The system optimization is a technique that changes the structure of the program in order to extract the duplicated modules without changing the source code, reuse of the extracted module. Structure-oriented development and object-oriented development are efficient at crosscutting concern modular, however can't be modular of crosscutting concept. To apply the crosscutting concept in an existing system, there is a need to a extracting technique for distributed system optimization module within the system. This paper proposes a method for extracting the redundant modules in the completed system. The proposed method extracts elements that overlap over a source code analysis to analyze the data dependency and control dependency. The extracted redundant element is used to program dependency analysis for the system optimization. Duplicated dependency analysis result is converted into a control flow graph, it is possible to produce a minimum crosscutting module. The element extracted by dependency analysis proposes a system optimization method which minimizes the duplicated code within system by setting the crosscutting concern module.

• Journal of Korean Society of Industrial and Systems Engineering
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• v.16 no.27
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• pp.43-49
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• 1993

The purpose of this study is to develope a computer-generated work measurement system for creating and maintaining standard data as well as labor standards applying MODAPTS(Modular Arrangement of Predetermined Time Standards) technique. The system consists of three major parts. The first part is a work measurement program applying MODAPTS technique for work standards. The second part is a work scheduling program which calculate each operator's machine and job allocations, operation and load schedules, wage and wage incentives and direct labor costs etc. The last part is the case study application program for R-Instrument Manufacturing Industry. The whole system is programmed by dbase-Ⅲ and by pop-up mu for IBM PC compatibles.

• Journal of the korean Society of Automotive Engineers
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• v.5 no.1
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• pp.63-78
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• 1983

As a basic study on the machine tools of modular structure, a Computer Aided Design of feed driving unit and an optimization of the dynamic characteristics of a machine tool structure are carried out.. Computer-aided design technique enables designers to save time and to easily do the job in variant design by effectively documenting design techniques and data. In this study a computer program package was developed for automatic design of a proper feed driving units by utilizing building block principle of OIWA CADET.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 1997.04a
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• pp.208.1-212
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• 1997

In this paper, a computer simulation tool for evaluting integrated engine/transmission control system using MATLAB/SIMULINK is investigated. Since a modular programming technique based upon the object-oriented programming is used in the paper, the simulation tool developed reduces the burden of model complexity by dividing engine/transmission systems into hierarchical subsystem. Furthermore, it also provides user -friendly, reusable, and upgradable characteristics of the system. The simulation tool could be useful to the automotive engineers who frequently change models and develop new systems in the automotive powertrain and control area.

• Journal of the Korean Institute of Telematics and Electronics A
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• v.31A no.4
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• pp.30-38
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• 1994

In this paper, we propose the parallel scrambling technique which is applicable in the multibit-interleaved multiplexing environment. For this, we introduce the concept of SSRG (simple shift register generator) and MSRG(modular shift register generator), and investigate their properties. We also introduce the concept of PSRG(parallel shift register generator) - parallel form of shift register generator, and consider realizations of PSRGs based on SSRGs and MSRGs. Finally, we show how to apply PSRGs to the parallel scrambling for the SDH system.