• Venture DIGEST
• /
• s.58
• /
• pp.17-17
• /
• 2004

모바일 멀티미디어 SoC전문기업 코아로직의 해외영업팀 김영태 팀장은 또래보다 일찍 팀장이 된 촉망받는 인재이다. 중학교 3학년때 미국으로 건너가 대학졸업을 마친 한국계 미국인인 그는 모국인 한국에서 사회인으로 첫발을 내딛었다.

• Journal of the Institute of Electronics Engineers of Korea SD
• /
• v.38 no.3
• /
• pp.205-210
• /
• 2001

In this paper, a novel compound mode logic based on the advantage of both CMOS logic and pass-transistor logic(PTL) is proposed. From the experimental results, the power-delay products of the compound mode logic is about 22% lower than that of the conventional CMOS logic, when we design a full adder. With the proposed logic, a high performance 32$\times$32-bit multiplier has been fabricated with 0.6um CMOS technology. It is composed of an improved sign select Booth encoder, an efficient data compressor based on the compound mode logic, and a 64-bit conditional sum adder with separated carry generation block. The Proposed 32$\times$32-bit multiplier is composed of 28,732 transistors with an active area of 1.59$\times$1.68 mm2 except for the testing circuits. From the measured results, the multiplication time of the 32$\times$32-bit multiplier is 9.8㎱ at a 3.3V power supply, and it consumes about 186㎽ at 100MHz.

• Journal of the Korea Society of Computer and Information
• /
• v.12 no.5
• /
• pp.49-56
• /
• 2007

This paper deals with grid job allocation and grid resource scheduling to provide a stable and quicker job processing service to grid users. In this paper, we proposed a fuzzy logic-based grid job scheduling model for an effective job scheduling in computational grid environment. The fuzzy logic-based grid job scheduling model measures resource efficiency of all grid resources by a fuzzy logic system based on diverse input parameters like CPU speed and network latency and divides resources into several groups by resource efficiency. And, the model allocates jobs to resources of a group with the highest resource efficiency. For performance evaluation, we implemented the fuzzy logic-based grid job scheduling model on the DEVS modeling and simulation environment and measured reduction rates of turnaround time, job loss, and communication messages in comparison with existing job scheduling models such as the random scheduling model and the MCT(Minimum Completion time) model. Experiment results that the proposed model is useful to improve the QoS of the grid job processing service.

• Journal of KIISE:Software and Applications
• /
• v.31 no.3
• /
• pp.255-266
• /
• 2004

In the Web-based information systems, separating the business process logic from the data and presentation logic brings about a wide range of advantages. However, this separation is not easily achieved; even the data logic may be not separated from the presentation layer. So, it requires to define an model for business processes, and then to map the model into the user's dynamic interface using the logic separating strategy. This paper presents a stylesheet method to recognize the process by extending XSLT (Extensible Stylesheet Language Transformations), in order to achieve the logic separation. To do this, it provides an specification of the business process, and a scheme that extracts business model factors and their interactions using a Petri-net notation to show the business model into the process point of view. This is an attempt to separate users' interaction from the business process, that is, dynamic components of interaction Web document from the process structure of Web applications. Our architecture consist mainly of an XSLT controller that is extended by a process control component. The XSLT controller is responsible for receiving the user requests and searching the relevant templet rule related to different user requests one by one. Separation of concerns facilities the development of service-oriented Web sites by making if modular. As a result, the development of service-oriented Web sites would be very easy, and can be changed without affecting the other modules, by virtue of the modularization concept. So, it is easy to develop and maintain the Web applications in independent manner.

• The Journal of the Korea Contents Association
• /
• v.9 no.5
• /
• pp.61-75
• /
• 2009

Generally, the development of the database application includes the requirement analysis phase of creating ERD (Entity Relationship Diagram) and process models, coding, and testing. From the above phases, the analysis phase is not most formalized. It is usually hard task because (1) customers don't know the details of the desired system; (2) developers can't with ease understand the business logic of the customers; (3) the outcomes of the analysis, which are ERD and process models, are not easy to understand to the customers. This paper propose that the executional forms, which are better to understand the systems, should be presented to the customers instead of the ERD. These forms should accept the data input so that customers can review the various aspects of the outcome models. The developers should be able to instantly implement the business logic and also should be able to visually demonstrate the logic in order to get the details of it. For this goal, the customer supplied business logic should be able to be implemented by the references between forms, actions, constraints from the perspective of the data flow. The customers try to execute the forms implementing the business logic and review their supplied logic find new necessary business logic of their own. Iterating these processes for the requirement analysis would result in the success of the analysis which is sufficiently detailed without conflicts.

• Journal of the Korea Academia-Industrial cooperation Society
• /
• v.18 no.2
• /
• pp.324-334
• /
• 2017

The simulators for a plant unit master control (UMC) developed by domestic or overseas researchers have been developed for operator-training purposes. UMC simulators normally constructed at the end of the plant construction, despite the UMC logics, should be simulated to pre-check many signal interfaces within the power generation systems. Because of the differences in construction schedule, it is difficult for logic designers or commissioning engineers to simulate the UMC logic during the design or commissioning stage. In this background, this paper proposes a simulation method that can be used easily by plant logic designers or operators in the MATLAB Simulink programming environment. The core of the UMC is realized with a unique simulation algorithm based on mathematical analysis and functional blocks combination. In addition, an integer-based configuration was proposed to realize the plant target value control for the equipment in the logic. With these simulation methods, functions, e.g., load distribution, high-low limitations, frequency compensation, etc. were simulated. The results showed that the plant UMC logic can be simulated in Simulink without a plant simulator. The various functions proposed in this paper can provide useful information about Simulink-based simulation design for plant logic designers or commissioning engineers during the power plant construction period.

• Proceedings of the KIEE Conference
• /
• 1999.07g
• /
• pp.2920-2922
• /
• 1999

본 논문에서는 유리 용해로의 온도 제어 문제에 있어서, 퍼지 이론의 응용 방식을 제시한다. 유리용해로의 동특성을 분석하고, 이에 적합하도륵 기존 고전적인 제어기와 퍼지 로직을 결합하는 알고리듬을 제시한다. 제시된 제어기는 실제 용해로의 생산공정에 효율적으로 적용되었다.

• Journal of the Korea Academia-Industrial cooperation Society
• /
• v.17 no.1
• /
• pp.693-699
• /
• 2016

The simulators for pump operation developed by domestic or overseas research have been developed for dynamic analysis or operator training purposes. However, previous developed simulators focused on the operators so they are unsuitable for logic designers or commissioning engineers who need to change the operation conditions or logics arbitrarily. In addition, the simulator for two or more condensate pumps' operation, which can be used easily by plant designers or operators, has not been developed. Accordingly, this paper suggests a simulation method that can be used easily for plant designers or operators using MATLAB Simulink. This suggestion helps users who can use MATLAB to implement ANSI/ISA S5.2, which is applied mainly for DCS (Distributed Control System). In addition, to implement the logics specified in the CODE, Sub-Systems were created for the block and evaluated to determine if they can be used in the simulator. In the working level stage using the suggested method, all error possibilities that might occur during the three pumps' rotation operation could be verified with the suggested simulator during the design stage or before operation.

• Journal of the Korea Institute of Information Security & Cryptology
• /
• v.21 no.5
• /
• pp.59-69
• /
• 2011

Since power analysis attack which uses a characteristic that power consumed by crypto device depends on processed data has been proposed, many logics that can block these correlation originally have been developed. DRP logic has been adopted by most of logics maintains power consumption balanced and reduces correlation between processed data and power consumption. However, semi-custom design is necessary because recently design circuits become more complex than before. This design method causes unbalanced design pattern that makes DRP logic consumes unbalanced power consumption which is vulnerable to power analysis attack. In this paper, we have developed new logic style which adds another discharge phase to discharge two output nodes at the same time based on DyCML to remove this unbalanced power consumption. Also, we simulated 1bit fulladder to compare proposed logic with other logics to prove improved performance. As a result, proposed logic is improved NED and NSD to 60% and power consumption reduces about 55% than any other logics.

• The Transactions of the Korea Information Processing Society
• /
• v.2 no.4
• /
• pp.603-610
• /
• 1995

In this paper, we present a highly efficient simulation package which supports simulation from functional level to gate level. The package consists of a set of front-end tools, a logic simulator, named HSIM(Highly efficient logic SIMulator), and an waveform analyzer. The front-end tools include a netlist compiler, functional primitive compiler and behavioral compiler. Key feature of developed simulator is that the compiled behavioral models written in C language are directly executed in the simulation engine using incremental loader. By doing so, we achieved significant speed up as compared with the interpretive functional simulator. Experimental results show that HSIM runs about 55% faster than traditional unit-delay event-driven interpretive simulator.