• Journal of the Korean Society for Precision Engineering
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• v.17 no.3
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• pp.7-14
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• 2000

Intelligent Manufacturing Systems (IMS) Program is an industry-driven and government-endorsed initiative which assists and encourages the formation of international research consortia to address technical and other emerging manufacturing challenges in the 21$^{st}$ century$^{[1]}$ . The IMS initiative places special emphasis on the establishment of R＆D projects which demonstrate equitable cooperation, including the protection of intellectual property. In this explanatory paper, a brief overview of the IMS Program is described, together with abstracts of some selected projects and a research result of Globeman21 project. The IMS prospective is also given.n.

• Journal of Chest Surgery
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• v.48 no.5
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• pp.371-374
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• 2015

We present a rare case of a patient with aortoiliac occlusive disease on the background of type A crossed renal ectopia, for whom open surgical intervention was required. Aortic exposure in patients with concomitant crossed renal ectopia can present technical challenges to the vascular surgeon. The knowledge of variations in the ectopic renal blood supply is of paramount importance when performing surgery to treat this condition and affects the choice of surgical exposure. We present and discuss the operative details of our patient and outline an approach to this subset of patients.

• Structural Engineering and Mechanics
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• v.17 no.3_4
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• pp.303-329
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• 2004

Magnetostrictive materials are routinely employed as actuator and sensor elements in a wide variety of noise and vibration control problems. In infrastructural applications, other technologies such as hydraulic actuation, piezoelectric materials and more recently, magnetorheological fluids, are being favored for actuation and sensing purposes. These technologies have reached a degree of technical maturity and in some cases, cost effectiveness, which justify their broad use in infrastructural applications. Advanced civil structures present new challenges in the areas of condition monitoring and repair, reliability, and high-authority actuation which motivate the need to explore new methods and materials recently developed in the areas of materials science and transducer design. This paper provides an overview of a class of materials that because of the large force, displacement, and energy conversion effciency that it can provide is being considered in a growing number of quasistatic and dynamic applications. Since magnetostriction involves a bidirectional energy exchange between magnetic and elastic states, magnetostrictive materials provide mechanisms both for actuation and sensing. This paper provides an overview of materials, methods and applications with the goal to inspire novel solutions based on magnetostrictive materials for the design and control of advanced infrastructural systems.

• Journal of Multimedia Information System
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• v.5 no.3
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• pp.179-188
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• 2018

In order to overcome the problems of contact palmprint recognition, a non-contact palmprint recognition system is developed on personal computer (PC) platform. Three methods, namely "double-line-single-point" (DLSP), "double-assistant-crosshair" (DAC) and "none-assistant-graphic" (NAG), are implemented for the palmprint localization to solve the severe technical challenges, including the complex background, variant illuminations, uncontrollable locations and gestures of hands. In NAG, hand segmentation and the cropping of region of interest are performed without any assistant graphics. The convex hull contour of hand helps detect the outside contour of little finger as well as the valley bottom between thumb and index finger. The three methods of palmprint localization have good operating efficiency and can meet the performance requirements of real-time system. Furthermore, an attendance system on PC platform is designed and developed based on non-contact palmprint recognition.

• Proceedings of the KIEE Conference
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• 2005.07a
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• pp.486-488
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• 2005

Hydrogen, as a future energy source, can be a good alternative of fossil fuel in view of environment and energy security. Hydrogen can be both fuel and electricity so that it will greatly change energy paradigm. Therefore, researches on hydrogen in power system area are essential and urgent due to their huge effects. In this paper, the importances and meanings of hydrogen in power system are reviewed as energy storage, DC generator, dispersed generation (DG), and combined heat and power (CHP). Technical challenges in hydrogen economy are also listed.

• Journal of Welding and Joining
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• v.33 no.3
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• pp.4-11
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• 2015

The offshore wind power plants are watched as a new market to accomplish the needed energy, bringing technical and economical challenges. Advanced countries in the field of wind industry are now appling the 600 MPa, 150~200 mm thick high strength steel to offshore wind power plants. Moreover, the high efficient welding methods which is weldable ultra tick high strength steel with 1 pass welding are developed and applied in manufacturing the offshore wind tower. This article deals with the present world wide status of offshore power plants and the tendency of the development of high efficient welding technology for constructing the offshore wind tower. This article intends to offer the materials for development and raising of the domestic offshore wind power technology.

• Proceedings of the Korean Society of Computer Information Conference
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• 2015.01a
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• pp.307-308
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• 2015

The biggest challenge of managing mobile interpretative device is encouraging visitors to have the mobile experience. Thus, in the research of the mobile application of the Leeum, a short orientation session as a treatment was provided to survey participants to make them use of a mobile experience and to solve the problem of hesitancy. Based on the research data, their satisfaction with visiting experience and with using the application appeared to be relatively high. However, several problems such as intrusiveness, isolation, head-down effect and technical problems needed to be improved to have a promising future.

• Ceramist
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• v.9 no.4
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• pp.58-71
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• 2006

Scaling of the gate stack has been one of the major contributors to the performance enhancement of CMOSFET devices in past technology generations. The scalability of gate stack has diminished in recent years and alternative gate stack technology such as metal electrode and high-k dielectrics has been intensively studied during the last decade. Tody the performance of high-k dielectrics almost matches that of conventional $SiO_2-based$ gate dielectrics. However, many technical challenges remain to be resolved before alternative gate stacks can be introduced into mainstream technology. This paper reviews the research in alternative gate stack technologies to provide insights for future research.

• 한국정보디스플레이학회:학술대회논문집
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• 2008.10a
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• pp.1163-1167
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• 2008

Since Samsung SDI and Sony started mass production of AM-OLED display for mobile/TV applications, OLED technology has emerged as leading candidate among the many technologies under development for next generation Flat panel displays. P-OLED (Polymer Organic Lighting Emitting Diode) technology, a class of OLED, is gathering momentum towards commercialization. P-OLED technology has made tremendous progress in terms of display performance (including life time, efficiency and color gamut) and in the maturity of ink jet printing process and equipment. In order to get into the mobile/TV application market successfully, P-OLED display technology must meet the following display makers' requirements: (1) P-OLED Display Performance in terms of lifetime, efficiency, and color coordinates, (2) Low Cost Manufacturing Technology such as "Solution Processable Printing Technology". P-OLED technology has already overcome many of the hurdles to mass manufacturing. In this paper, the latest developments in ink jet printing technology, including P-OLED material performance, is discussed.

• Proceedings of the IEEK Conference
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• 2008.06a
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• pp.1189-1190
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• 2008

Wireless sensor networks (WSN) have attracted much attention in recent years due to their potential use in many applications such as border protection and combat field surveillance. Given the criticality of such applications, maintaining a dependable operation of the network is a fundamental objective. However, the resource constrained nature of sensor nodes and the ad-hoc formation of the network, often coupled with an unattended deployment, pose non-conventional challenges and motivate the need for special techniques for dependable design and management of WSN. In this article, we highlight the potential of careful positioning of the base station (BS), which acts as a sink resources.