• Proceedings of the Korean Institute of Communication Sciences Conference
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• 1996.06a
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• pp.664-667
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• 1996

• Journal of Korean Electronics
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• v.25 no.2
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• pp.32-33
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• 2005

• Korea Information Processing Society Review
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• v.21 no.1
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• pp.40-47
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• 2014

• Proceedings of the Korea Database Society Conference
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• 2002.10a
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• pp.494-510
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• 2002

Overview: web-based 기능제공. 가망고객/우수 고객들에 대한 수익 및 파이프 라인관리. Business Results: 영업력 향상. 향상된 영업관리 제고 (중략)

• JOURNAL OF ELECTRICAL WORLD
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• s.264
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• pp.18-26
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• 1998

• 월간산업보건
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• s.317
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• pp.53-56
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• 2014

• THE INDUSTRY AND TECHNOLOGY OF GAS
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• v.2 no.1
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• pp.95-100
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• 1998

• Journal of the Korea Institute of Building Construction
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• v.24 no.1
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• pp.67-75
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• 2024

In the context of Korean residential heating systems, Ondol pipelines are a prevalent choice. However, the maintenance of these pipelines becomes a complex task once they are embedded within concrete structures. As time progresses, the accumulation of sludge, corrosive oxides, and microorganisms on the inner surfaces of these pipelines diminishes their heating efficiency. In extreme scenarios, this accumulation can induce corrosion and scale formation, compromising the system's integrity. Consequently, this research introduces an ultrasonic generation system tailored for the upkeep of Ondol pipelines, with the objective of empirically assessing its practicality. This investigation delineates three variants of ultrasonic generating apparatuses: those employing surface vibration, external generation, and internal generation techniques. To emulate the presence of contaminants within the pipelines, substances in powder, slurry, and liquid forms were employed. The efficacy of the cleaning process post-ultrasonic wave application was scrutinized over time, with image analysis methodologies being utilized to evaluate the outcomes. The findings indicate that ultrasonic waves, whether generated externally or internally, exert a beneficial effect on the cleanliness of the pipelines. Given the inherent characteristics of Ondol pipelines, external generation proves impractical, thereby rendering internal generation a more viable solution for pipeline maintenance. It is anticipated that future endeavors will pave the way for innovative maintenance strategies for Ondol pipelines, particularly through the advancement of internal generation technologies for pipeline applications.

• Journal of IKEEE
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• v.8 no.2 s.15
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• pp.161-165
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• 2004

In this paper, an 8bit wave pipelined adder using the static CMOS plus Edge-Sensing Completion Detection Logic is presented. The clockless wave-pipelining algorithm was implemented in the circuit design. The Edge-Sensing Completion Detection (ESCD) in the algorithm is consisted of edge-sensing circuits and latches. Using the algorithm, skewed data at the output of 8bit adder could be aligned. Simulation results show that the adder operates at 1GHz in $0.35{\mu}m$ CMOS technology with 3.3V supply voltage.

• Journal of Ocean Engineering and Technology
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• v.31 no.3
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• pp.227-232
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• 2017

Subsea pipelines are one of the most important structures used to transport fluids such as oil and natural gas in offshore environments. The uplift behavior of the pipeline caused by earthquakes and buoyancy can result in a pipeline failure. The objective of this study is to examine the peak uplift resistance through parametric studies with numerical modeling by PLAXIS 3D Tunnel. The effects of the embedment ratio and pipe diameter were first examined for uplift resistance in sand and soft clay conditions. Then the length of geogrid layers and the number of geogrid layers were examined in terms of ability to resist uplift behavior.