• Structural Engineering and Mechanics
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• v.31 no.5
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• pp.567-585
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• 2009

The aim of this study was to investigate the flexural behavior of reinforced concrete beams strengthened with a novel strengthening system. Concrete beams were strengthened with a hybrid retrofit system consisting of high strength steel cords impregnated in an inorganic fireproof matrix (Geopolymer). The strengthened reinforced concrete beams along with non-strengthened control beams were tested monotonically under four point bending loading conditions. Moreover, an analytical model is introduced, that can be used to analyze the flexural performance of the strengthened beams. The experimental results indicate that the failure of the strengthened beams was based on the yielding of the reinforcement in the tension face of the beams, followed by a local slippage of the steel cords. The flexural stiffness of the strengthened beams was significantly improved compared to the stiffness of the non-strengthened beams. In conclusion, the strengthening system can provide an effective alternative to commercially available systems.

• Proceedings of the IEEK Conference
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• 2001.06e
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• pp.219-222
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• 2001

The human speech sounds are use to diagnosis in oriental medicine with ‘0-sung’theory. In general, human voice are sound waves which generated by phonation. Two major parts of phonation are vocal cords and vocal tract. The uniqueness of individual vocal sound depend on structure and usage of their vocal cords and tract. In the oriental medicine, “0-sung (5-tones)” has been used to classify constitution of human body In order to characterize the “0-sung”, their frequency characteristics are investigated, and a principal frequency component is extracted. Then, the principal component is applied to classify sounds into “0-sung.”

• Journal of the Korean Society of Laryngology, Phoniatrics and Logopedics
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• v.29 no.2
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• pp.107-109
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• 2018

Lipomas are benign tumors and most commonly occurs in trunk, upper extremities and lower extremities. About 13-15% of lipomas are located in the head and neck area. However, lipomas of larynx are very rare and only about 100 cases have been reported. Laryngeal lipomas occur mainly in epiglottis, aryepiglottic fold and false vocal cords, which have adipose tissue. Author experienced an unusual presentation of laryngeal lipoma. Tumor seemed to be located in the supraglottis in the preoperative laryngoscopy, but it was found to be located at the free margin of the true vocal cord. To date, only one case has been reported in the world literature. We report this case with a review of the literature.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2021.10a
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• pp.311-312
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• 2021

Measurement technology related to vocal cord disease is in a late state of technology accumulation, and electroglotograph(EGG) measuring equipment is dependent on foreign production. This paper seeks to design a wearable wireless electrical gate conductivity measurement terminal capable of easily measuring and monitoring the vibration state of the vocal cords, that is, the contact pattern of the vocal cords, which is important in vocalization.

• Proceedings of the Korea Institute of Fire Science and Engineering Conference
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• 1999.11a
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• pp.95-99
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• 1999

• Proceedings of the Korea Institute of Fire Science and Engineering Conference
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• 2004.06a
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• pp.20-25
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• 2004

• Proceedings of the Korea Institute of Fire Science and Engineering Conference
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• 2003.10a
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• pp.105-111
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• 2003

• Proceedings of the Korean Fiber Society Conference
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• 2001.04b
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• pp.67-70
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• 2001

• Journal of Korean Medical classics
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• v.30 no.3
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• pp.55-76
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• 2017

Objectives : The transition of the 29 diagrams of Heart originated from MingTangZangFuTu will be used to understand the shape of heart and the changes of people's understanding of heart. Methods : The 29 diagrams of Heart originated from MingTangZangFuTu are divided according to their shape elements (Heart itself, internal curvatures, structures above heart, wuzangxi, and excursus). Then its transitions are analyzed, and each shape element is compared to modern anatomy and its textual basis is searched. Results : The lengthy cylinderical organ situated above the heart is composed of upper part consisting with joints and the lower part void of joints. The upper part is Pyewan (such as the lungs) and fall into trachea. The lower part is Xinxi or Feixi which are either relative vein (or aorta) or left bronchus that passes behind the heart. This depiction of the structures around the heart can be considered to have composed by actual observance of a physical heart, a method that is similar to anatomy. However, the shape of the heart itself is described as a lotus flower that has not been bloomed, a depiction which finds its origin from Zhongguangbuzhu huangdineijing suwen (762). The three short curvatures inside the heart is described as Pericardium, influenced by Shisijingfahui (1341) in its depiction, or as sammo, influenced by Nanjing. Structures that are connected directly from the heart to spleen, kidney, and uterus are not found in modern anatomy. The saying in Excursus "All cords of five internal organs belong to heart" is based on Huatuoxuanmenneizhaotu, and this is changed to the saying cords of four internal organs belong to heart in Leijingtuyi for the first time. Conclusions : The authors of medical scriptures at the time did not have a method of direct observance when they were copying heart diagrams. Therefore, they made changes to the source material's diagram and excursus while being influenced by Nanjing, Huatuoxuanmenneizhaotu, and Shisijingfahui. Then the doctors' understandings with regards to the shape and function of heart were reflected during that process.

• Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.19 no.1
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• pp.130-135
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• 2005

The electrical fire frequently happens through careless use such as poor contact, mechanical stress on power cord sets. In this paper, we simulated a wall-model in order to investigate the patterns of fire dispersion on power cord sets which consists of vinyl cord and rubber cord, etc. The fire progress and dispersive patterns were measured by a high speed imaging system(HG-100K, REDLAKE, USA). From the results, the fire pattern of power cord sets was progressed in order of flashover, scattering and disconnection. The short-circuit of the vinyl cords happened easier than the rubber cords by the external flame. In case vinyl cord is disconnected. the fire progress is not observed because the ignition energy decreases. Whereas, the fire progressed continuously in case of the rubber cord.