• KSII Transactions on Internet and Information Systems (TIIS)
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• 제13권9호
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• pp.4429-4445
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• 2019

As low-power and low-rate WSNs are being widely used for industrial applications, the scheduling of such applications becomes a critical issue to guarantee meeting the stringent requirements of determinism and tight latencies. This paper studies the link scheduling problem for real-time industrial applications in time-slotted channel hopping (TSCH) networks. We propose a heuristic algorithm for centralized link scheduling referred to as path-collision aware least laxity first (PC-LLF) algorithm, which dynamically prioritizes the packets based on the laxity time to the end-to-end deadlines and the amount of collisions that messages might deal with along their designated paths to the destination device. We propose schedulability analysis of real-time applications scheduled under our prioritization approach over TSCH networks, based on the literature on real-time schedulability analysis of multiprocessors and distributed systems. We show that our methodology provides an improved schedulability condition with respect to the existing approaches. Performance evaluation studies quantify to quantify the performance of our proposed approach under a variety of scenarios.

• Journal of Industrial and Engineering Chemistry
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• 제67권
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• pp.1-11
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• 2018

Polymer composites offered broad engineered applications, however their diversity get restricted owing to fluctuations in thermomechanical properties during heating or cooling hence great concern required prior their applications through thermomechanical analysis (TMA). Traditionally, TMA or dilatometry found to be simple, ideal, reliable, sensitive, excellent and basic thermal analytical technique. TMA provides valuable information on thermal expansion, glass transitions temperature (Tg), softening points, composition and phase changes on material of having different geometries simply by applying a constant force as a function of temperature. This compilation highlights the basics and experimental of TMA for both research and technical applications and also provide literature on TMA of polymers, hybrid composites, nanocomposites and their diverse applications.

• 한국산학기술학회논문지
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• 제15권7호
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• pp.4500-4507
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• 2014

스마튼 폰 사용자들의 수가 기하급수적으로 증가함에 따라 향후 모바일 시장의 규모는 엄청나게 거대해질 것으로 전망되고 있다. 이러한 성장세에 맞춰 많은 형태의 모바일 앱들이 개발되고 있다. 그런데 문제는 개발된 앱들에 대한 재사용성, 확장성 등과 같은 품질에 대한 검증이 제대로 이루어지고 있지 않다. 특히 유료 앱의 경우, 사용자들로 하여금 많은 불만의 요소들이 생기고 있는 실정이다. 그래서 본 연구에서는 모바일 앱 개발 과정에서 모바일 앱의 품질을 측정할 수 있는 메트릭을 개발하고자 한다. 이를 통해 모바일 앱에 대한 품질 검증이 이루어짐으로써 사용자들로 하여금 모바일 앱에 대한 만족도를 향상시킬 수 있을 것이라 기대한다.

• 한국산학기술학회논문지
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• 제13권2호
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• pp.628-635
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• 2012

스마트폰 애플리케이션(스마트폰 앱) 시장이 급속히 성장하고 있다. 본 연구는 스마트폰 앱에 대한 사용의도와 충성도의 변수인 정보품질(상호작용, 내용, 정황성)에 개인적인 태도(혁신성, 친숙성)가 미치는 영향을 실증적으로 평가하였다. 연구 결과 혁신성, 콘텐츠품질, 정황성품질은 사용의도에 긍정적인 영향을 주는 것으로 나타났다. 반면에 친숙성과 상호작용품질은 사용의도에 긍정적인 영향을 주지 않는 것으로 나타났다. 그리고 사용의도 역시 충성도에 긍정적인 영향을 주지 않는 것으로 나타났다.

• 한국정밀공학회지
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• 제31권12호
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• pp.1067-1076
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• 2014

To date, biomedical application of three-dimensional (3D) printing technology remains one of the most important research topics and business targets. A wide range of approaches have been attempted using various 3D printing systems with general materials and specific biomaterials. In this review, we provide a brief overview of the biomedical applications using 3D printing techniques, such as surgical tool, medical device, prosthesis, and tissue engineering scaffold. Compared to the other applications of 3D printed products, the scaffold fabrication should be performed with careful selection of bio-functional materials. In particular, we describe how the biomaterials can be processed into 3D printed scaffold and applied to tissue engineering area.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2006년도 제37회 하계학술대회 논문집 C
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• pp.1540-1541
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• 2006

For limitation and interruption of short circuit currents from low voltage to extra high voltage applications, the electrical equipment including fuses and circuit breakers, are widely used today. But in order to anticipate increasing needs for effective and competitive device for limiting the growing fault current in electrical power systems, fault current limitation technologies and fault current limitation devices are widely introduced and investigated in these days. Fault current limiters are emerging electric equipment which is under development using various methods including superconducting fault current limiter, solid state fault current limiter, arc driving fault current limiters. And these various methods have some advantages and disadvantages to take into considerations In order to commercialize fault current limiters in the electrical networks, a lot of discussions should be given on the point that fault current limiting methods, need for fault current limiters, coordination with existing protective system, and field experience before commercialization. In this paper, recent trends of fault current limiting technologies will be reviewed and the key issues of superconducting fault current limiters will be dealt with. And finally, future applications of superconducting fault current limiters would be discussed.

• Journal of the Korean Society for Industrial and Applied Mathematics
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• 제5권1호
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• pp.35-45
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• 2001

In this paper we point out an Ostrowski type inequality for the Riemann-Stieltjes integral ${\int}_a^b$ f (t) du (t), where f is of p-H-$H{\ddot{o}}lder$ type on [a,b], and u is of bounded variation on [a,b]. Applications for the approximation problem of the Riemann-Stieltjes integral in terms of Riemann-Stieltjes sums are also given.

• 한국초전도학회:학술대회논문집
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• 한국초전도학회 1999년도 High Temperature Superconductivity Vol.IX
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• pp.18-21
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• 1999

This paper is to present the general descriptions and their research trend of MRl/NMR which has already commercialized and also is more successful than any other applications of superconducting magnet, Superconducting Single Crystal Growing Equipment and Superconducting Magnetic Separation technology which are practically used in the related areas, and power electric application machine, which is the most effective and efficient one among the applications using high magnetic field. Therefore, it is hoped that this study will help to establish the ground of the industrial application of superconductivity in Korea.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1992년도 하계학술대회 논문집 A
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• pp.196-200
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• 1992

Transmission loss retains a complete set of system state information. If we could exploit its behavior, we could find various useful applications. This study is a such exploitation to find same possibilities of the loss application. It seems to have very prospective possibilities. It has been tried to establish some network indices to indicate operation margin. And further some prospective applications are suggested.

• 한국산학기술학회논문지
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• 제5권1호
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• pp.87-92
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• 2004

This review focuses on the developed and the being developed environmental sensors in particular biological sensors. As well as discussing the classification and some main principles, presenting current trend of the environmental sensors is given. Two main categories are immunosensors and catalytic sensors. In addition to those. DNA or RNA sensors or protein based sensors are discussed. Some crucial examples of the applications of such sensors are given to show how the sensor technology it used for environmental and biological monitoring, biomarkers of exposure.