• Journal of Korea Multimedia Society
• /
• v.10 no.1
• /
• pp.139-146
• /
• 2007

Many researches had been gone about method to track moving object using wireless sensor network. We examined tradeoffs that exist between quantity of energy and correctness of tracking, and we confirmed that can get more energy sayings through improved motion prediction method. The consumed energy in the tracking is used by sensor node for sensing the object, and tracking correctness is a differ once of actual object position from calculated value by sensing. Some tracking methods and controlling parameters causes a variation of tracking correctness and energy consuming, we can get best energy effectiveness by motion prediction algorithm. Furthermore, we get better tracking quality and energy effectiveness through using a motion prediction algorithm that consider acceleration. By the simulation, we know that if we use an accurate motion prediction algorithm, node activation range that is used for target's predicted position should be restricted to sensing range of sensor is better.

• Journal of KIISE:Computer Systems and Theory
• /
• v.26 no.12
• /
• pp.1539-1547
• /
• 1999

캐리-세이브 가산기 (CSA)는 회로 설계 과정에서 빠른 연산 수행을 위해 가장 널리 이용되는 연산기 중의 하나이다. 그러나, 현재까지 산업체에서 CSA를 이용한 설계는 설계자의 경험에 따른 수작업에 의존하고 있고 그 결과 최적의 회로를 만들기 위해 매우 많은 시간과 노력이 소비되고 있다. 이에 따라 최근 CSA를 기초로 하는 회로 합성 자동화 기법에 대한 연구의 필요성이 대두되고 있는 상황에서, 본 논문은 연산 속도를 최적화하는 효율적인 CSA 할당 알고리즘을 제안한다. 우리는 CSA 할당 문제를 2단계로 접근한다: (1) 연산식의 멀티 비트 입력들만을 고려하여 최소 수행 속도 (optimal-delay)의 CSA 트리를 할당한다; (2) (1)에서 구한 CSA 트리의 수행 속도 증가가 최소화 (minimal increase of delay) 되는 방향으로 CSA들의 캐리 입력 포트들에 나머지 싱글 비트 입력들을 배정한다. 실제 실험에서 우리의 제안된 알고리즘을 적용하여 연산식들의 회로 속도를 회로 면적의 증가 없이 상당한 수준까지 줄일 수 있었다.Abstract Carry-save-adder (CSA) is one of the most widely used implementations for fast arithmetics in industry. However, optimizing arithmetic circuits using CSAs is mostly carried out by the designer manually based on his/her design experience, which is a very time-consuming and error-prone task. To overcome this limitation, in this paper we propose an effective synthesis algorithm for solving the problem of finding an allocation of CSAs with a minimal timing for an arithmetic expression. Specifically, we propose a two step approach: (1) allocating a delay-optimal CSA tree for the multi-bit inputs of the arithmetic expression and (2) determining the assignment of the single-bit inputs to carry inputs of the CSAs which leads to a minimal increase of delay of the CSA tree obtained in step (1). For a number of arithmetic expressions, we found that our approach is very effective, reducing the timing of the circuits significantly without increasing the circuit area.

• Journal of the Korea Institute of Information and Communication Engineering
• /
• v.20 no.1
• /
• pp.117-122
• /
• 2016

In this paper, we propose 24-GHz CMOS radio frequency (RF) power amplifier for short-range automotive collision avoidance radars. This circuit contains common source stage with inter-stages conjugate matching circuit as a class-A mode amplifier. The proposed circuit is designed using TSMC $0.13-{\mu}m$ mixed signal/RF CMOS process ($f_T/f_{MAX}=120/140GHz$). It operates at the supply voltage of 2V, and it is designed to have high power gain, low insertion loss and low noise figure in the low supply voltage. To reduce total chip area, the circuit used transmission lines instead of the bulky real inductor. The designed CMOS power amplifier showed the smallest chip size of $0.1mm^2$, the lowest power consumption of 40mW, the highest power gain of 26.5dB, the highest saturated output power of 19.2dBm and the highest maximum power-added efficiency of 17.2% as compared to recently reported results.

• Korean Journal of Food Science and Technology
• /
• v.24 no.5
• /
• pp.428-439
• /
• 1992

Drying process in a fixed bed red pepper dryer was modeled and simulated. Drying efficiency describing the effectiveness of energy usage in red pepper drying was defined as a ratio of energy used for moisture evaporation to total energy consumption, and expressed in combination of measurable temperature variables. The efficiency was compared with real evaporative efficiency and tested in the simulated and experimental drying. An overall drying efficiency was derived, and analyzed for various control variables consisting of drying temperature, air recycle ratio and air flow rate. Optimal operation conditions of drying was then searched by Box's complex method by using it as an objective function. Carotenoids retention was simulated and put as a constraint of product quality in the optimization. The optimization results gave that two staged drying operation could improve the ding efficiency compared with single staged drying. As a technique for further energy saving automatic termination of drying appeared feasible by monitoring an exit air temperature from dryer.

• Proceedings of the Korean Society of Dyers and Finishers Conference
• /
• 2012.03a
• /
• pp.94-94
• /
• 2012

섬유산업은 원가 경쟁력 향상과 산업 고도화에 필요한 미래형 저에너지 염색가공 핵심 기술을 통한 고부가가치 섬유제품의 창출과 섬유산업의 선진화달성에 꾸준히 노력을 해 왔다. 염색가공업의 에너지 소비는 섬유산업에서 염색가공업이 연료 사용량의 77%, 전기사용량의 54%를 차지하여 섬유산업의 에너지절감을 위해서는 염색가공 공정에서의 에너지 절감이 가장 중요하다. 국내 염색가공 분야의 4백여 업체를 대상으로 실시한 애로 기술에 관한 설문 조사결과에 따르면 염색공업의 에너지 절약형 구조로의 전환을 위해서 가장 시급히 요구되는 우선기술 1순위는 에너지절약형 염색가공 공정기술로 에너지 절감의 필요성을 반영하고 있다. 효소(Enzyme)가 섬유산업에 도입되기 시작한 것은 면섬유의 호발에 아밀라제가 사용되기 시작하면서 부터이며, 최근 유럽선진국들의 강화된 환경규제와 눈부신 바이오테크놀러지(Biotechnology)의 발전에 기인하여 섬유산업에서 관심과 적용이 확대되고 있다. 섬유산업에서 효소적용의 장점은 효소 그 자체가 자연산물이기 때문에 생분해 되고 중성에 가까운 pH에서 반응하므로 처리액이 환경문제를 일으키지 않으며, 기질특이성을 가져 매우 선택적으로 반응하여 부반응으로 인한 섬유의 손상을 최소화 하는 효과를 들 수 있으며, 무엇보다 소량 저온반응으로 인한 에너지절감이 가장 큰 장점이라 할 수 있다. 실제 섬유산업에서는 전분호제를 제거하는 아밀라아제, 데님워싱 및 면섬유의 후가공에 사용하는 셀룰라아제, 표백 후 잔류하는 과산화수소를 제거하는 카탈라제 등을 적용하는 사례가 많아지고 있으며, 이 밖의 다양한 공정에 효소 이용연구가 활발히 진행되고 있다. 본 연구에서는 그 동안 섬유 업체에서 직물의 표면 잔털을 제거하여 매끄러운 외관과 선명한 색상을 재현하기위해 후가공으로 셀룰라아제를 이용했던 공정을 개선하여, 효소를 이용한 정련-Bio polishing-염색의 3공정을 1욕처리를 통해 기존 단독으로 진행되어진 기존제품과의 중량, 외관, 색상재현성, 정련성 등을 비교하여 에너지 절약형 공정기술의 효과를 극대화 해보았다.

• Proceedings of the Korea Contents Association Conference
• /
• 2007.11a
• /
• pp.680-684
• /
• 2007

In Korea the musical was granted very close an art however recently it is rapidly take the position a new trend of the mass culture industry with some of promoted lifestyle due to increased income and with spreading consumer culture of well-being. This study is to consider the musical as a way of OMSU to observe how to produce the musical the with the original one that recorded as the best animation program with highly broadcasting rate as it is broadcasted on TV. It is belongs to a category of musical or a performance, has a good feature of children's program with arranging the broadcasting. Through this study, developing performance art to OSMU, it wishes to utilize people that produce the performance applying the contents of animations and cartoons, to make value added This study is for presenting an effective way of OSMU, with studying and researching the production process of the musical . The original source the cartoon and animation is transferred to a musical with a technical feature of digital audio-visual, with characterizing to an attractive musical characters from the original characters, and with humorize twisted story structure based on the basic storyline.

• The Journal of the Korea Contents Association
• /
• v.15 no.1
• /
• pp.105-113
• /
• 2015

This paper investigated Korean popular entertainment (K-entertainment, hereafter) tourism using theory of intention-behavior. Dividing the sample of international visitors to Seoul into the groups of "inclined actors", "inclined abstainers", and "disinclined abstainers," we examined the factors affecting such a division. The results showed that between the inclined actors and the inclined abstainers, there was no significant difference in the years of exposure to K-entertainment contents or the frequency of going to K-entertainment performance in the past. In contrast, the inclined actors were found to have a greater level of knowledge, ability, and cooperation compared to the inclined abstainers. In addition, we found that the K-entertainment performance in Korea was perceived as a substitute, rather than a complement to the performance held elsewhere in the world. Our findings suggest that interests in K-entertainment alone are not sufficient to drive the international visitors' intention to the action of attending K-entertainment performance during their visit to Korea. To this end, this study implies that it is necessary to design attractive tourism packages that include K-entertainment performance.

• The Journal of the Institute of Internet, Broadcasting and Communication
• /
• v.14 no.6
• /
• pp.119-123
• /
• 2014

The main purpose of reactive power compensation monitoring system is to manage factory electrical installation efficiently by On-Off switching reactive power compensation equipment. The existing reactive power compensation monitoring system is only able to be managed by operator whenever electrical installation needed reactive power. Therefore, it may be possible for propagating the installation's faults when operator make the unexpected mistakes. To overcome the unexpected mistakes, in this paper, the author presents a reactive power compensation monitoring system for factory electrical installation using active database. by using active database production rule, stated system can minimize unexpected mistake and can operate centralized monitoring system efficiently. Test results on the five factory electrical installations show that performance is efficient and robust.

• The Journal of the Korea Contents Association
• /
• v.12 no.12
• /
• pp.395-412
• /
• 2012

RAM analysis using field data is important and useful for acquisition and operation of weapon systems. But this kind of analysis didn't conducted due to the absence of weapon system's failure data in case of warship. This study suggest failure tracking process based on maintenance and repair parts consumption data and proves suggested method enables conducting RAM analysis. This method obtains validity through field operator's reviews. The results on 9 warships in this study significantly correspond with weapon system operator's experiences. Because the result of this study contains effects of various operational environments in field, it will useful for correction and verification on existing another weapon system's RAM estimates. If this kind of RAM data are sufficiently accumulated, it will be used to DB of korean unique RAM analysis.

• Journal of Internet Computing and Services
• /
• v.15 no.1
• /
• pp.103-112
• /
• 2014

In recent years, the rapid diffusion of smart devices and growth of internet usage and social media has led to a constant production of huge amount of valuable data set that includes personal information, buying patterns, location information and other things. IT and Production Infrastructure has also started to produce its own data with the vitalization of M2M (Machine-to-Machine) and IoT (Internet of Things). This analysis study researches the applicable effects of Structured and Unstructured Big Data in various business circumstances, and purposes to find out the value creation method for a corporation through the Structured and Unstructured Big Data case studies. The result demonstrates that corporations looking for the optimized big data utilization plan could maximize their creative values by utilizing Unstructured and Structured Big Data generated interior and exterior of corporations.