• Journal of Korean Society of Coastal and Ocean Engineers
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• v.19 no.4
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• pp.295-302
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• 2007

Abnormally high waves occurring at the east coast of korea were observed at five field measurement stations and their characteristics were analyzed with the use of wind data provided by the Korean Meteorological Administration. The high waves occurred because strong Donghae twister that was developed by extratropical cyclone blew while high swell arrived at the east coast of Korea. At Sokcho, the most northern site among the five measurement stations, maximum gust speed was 63.7 m/s and significant wave height reached at its maximum of 9.69 m with the corresponding peak wave period of 12.8 s. The reason for appearance of the abnormally high waves is that high swell continued while the twister blew strongly. Moreover, the wind direction was the same as the direction of swell propagation, which maximizes the increase of wave height due to superposition of swell and wind-generated waves. On the east coast of Korea, outbreak of this type of storm waves is very probable in winter season so that it is requested to establish a countermeasure of minimizing possible damage caused by the storm waves.

• Proceedings of the Korean Fiber Society Conference
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• 2007.11a
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• pp.541-542
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• 2007

• The Journal of Korean Academy of Orthopedic Manual Physical Therapy
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• v.23 no.1
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• pp.15-22
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• 2017

Background: The purpose of this study was to investigate into the effect of soft tissue mobilization using prop on the pain, grip strength and functional activity in patients with lateral epicondylitis. Methods: Fifteen patients with lateral epicondylitis were recruited. Before treatment, they were evaluated using visual analogue scale (VAS), grip strength, test, patient-rated tennis elbow evaluation (PRTEE), proprioception, and were reevaluated after six weeks of treatment. Results: As a result of comparing all participants before and after the experiment, the grip strength increased significantly (p<.05). And the VAS, PRTEE, and proprioception decreased significantly (p<.05). Conclusion: According to the results above, soft tissue mobilization using prop can help improve pain, grip strength, PRTEE and proprioception. Also, soft tissue mobilization using Blackroll's Twister technique was able to select interventions depending on the patient's condition and the desired goal.

• New & Renewable Energy
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• v.3 no.3
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• pp.28-35
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• 2007

In this study, the wave power resources at the three locations [Sokcho, Hupo, and Onsan] on the east coast of Korea were estimated by using the field measurement data and were compared with the results of previous researches. It was found that seasonal variation of the wave power is very significant on the east coast of Korean peninsula. The wave power was the smallest in the summer season at all the locations. At Hupo and Onsan, the highest value of the monthly-averaged wave power was observed in September, probably because the pathways of typhoon in September were close to both locations. At the northest location, Sockcho, in contrast, the monthly highest value of the wave power appeared in January, probably owing to the influence of storm waves driven by Donghae twister. The estimated annual average wave power was 4.5 kW/m at Sokcho, which was about two times larger than those at other two locations. It is noteworthy that this result is completely different from past researches based on wave hindcasting data. In addition, the estimates of wave power by the past researches seemed to be smaller than those of the present study, especially at the northern region of the east coast.

• Proceedings of the Korean Fiber Society Conference
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• 2003.04a
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• pp.135-138
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• 2003

오늘날의 섬유산업은 단순히 입는다는 기능적인 면에서 탈피하여 인간의 미와 감성을 추구하는 매체로써의 역할을 요구하고 있다. 따라서 다양한 직물을 선호하는 소비자들의 욕구를 충족시켜주기 위하여 원사 자체가 점점 다양화 되어가고 있으며, 특히 합성섬유의 발명에 의해서 의류용 소재로 많이 사용되고 있다. 섬유에 감성을 부여하기 위한 방법으로 여러 가지가 있지만 최근 일본, 이태리 등을 중심으로 활발히 시도되고 있는 복합연사기술의 개발에 많은 관심이 집중되고 있다.[7] (중략)

• Communications of the Korean Mathematical Society
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• v.18 no.3
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• pp.515-519
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• 2003

Let M be a hyperkahler manifold with the hyperkahler structure (g, I, J, K). In [5], D. Huybrechts suggests that it is an open and interesting question whether any Kahler class that stays Kahler in the twister family can actually be represented by an harmonic Kahler form. In this paper we will consider both this problem and the set of all the primitive harmonic Kahler forms on M.

• Fibers and Polymers
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• v.7 no.3
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• pp.305-309
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• 2006

This research studies the factors which influence the tensile strength of tire cords. Five yam samples are made by changing the spinning conditions and viscosity to get various physical properties. Different twisting methods are introduced and the yams are twisted under different processing conditions for each twisting process. With the experimental results, various analyses are performed to find the important factors in retaining strength after the twisting process. SEM and optical microscopic photographs are taken along with some measurements to assist the analysis.

• Atmosphere
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• v.14 no.2
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• pp.7-10
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• 2004

A short review on TOTO (TOtable Tornado Observatory), one of the earliest in-situ observing systems for tornado, is provided. TOTO was outfitted with sensors for measuring wind, pressure and humidity, and storm researchers, in mid-1980's, tried to put it inside tornadoes for detailed studies on tornado, but failed. However, the accumulated knowledge and experience with TOTO lead to a successful field program in mid-1990's. A story about DOROTHY, a parody of TO TO in the movie "Twister!", is also provided.

• Journal of KIISE
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• v.43 no.6
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• pp.621-626
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• 2016

Recursive query algorithm is used in many social network services, e.g., reachability queries in social networks. Recently, the size of social network data has increased as social network services evolve. As a result, it is almost impossible to use the recursive query algorithm on a single machine. In this paper, we implement recursive query on two popular in-memory distributed platforms, Spark and Twister, to solve this problem. We evaluate the performance of two implementations using 50 machines on Amazon EC2, and real-world data sets: LiveJournal and ClueWeb. The result shows that recursive query algorithm shows better performance on Spark for the Livejournal input data set with relatively high average degree, but smaller vertices. However, recursive query on Twister is superior to Spark for the ClueWeb input data set with relatively low average degree, but many vertices.

• Journal of Sericultural and Entomological Science
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• v.46 no.1
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• pp.38-43
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• 2004

The strings of Gayageum and Geomungo are usually made of raw silk. It needs good vibration as well as good durability to endure during play the Gayagum and Geomungo. This study was carried out to discuss some effects of twisting number of first and final twisting on the mechanical properties of silk Gayageum strings. Tenacity of strings were largely decreased proportionally with the increase of number of twisting of strings but elongation of strings were in the opposition direction. However, it was needed to hard twisting string for the good vibration. The proper S direction twisting velocity of moving twister during final twisting (Z direction) until three thread become one thread, was 40% of basic twister.