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홍기현,이병문 한국멀티미디어학회 2022 멀티미디어학회논문지 Vol.25 No.2
Road facilities such as CCTV poles have potential risk of collision accidents with a car. A collision detection algorithm installed in the facility allows the collision accident to be known remotely. Most collision detection algorithms are operated by simply focusing on whether a collision have occurred, because these methods are used to measure only acceleration data from a 3-axis sensor to detect collision. However, it is difficult to detect other detailed information such as malfunction of the sensor, collision direction and collision strength, because it is not known without witness the accident. Therefore, we proposed enhanced detection algorithm to get the collision direction, and the collision strength from the tilt of the facility after accident using a 9-axis sensor in this paper. In order to confirm the performance of the algorithm, an accuracy evaluation experiment was conducted according to the data measurement cycle and the invocation cycle to an detection algorithm. As a result, the proposed enhanced algorithm confirmed 100% accuracy for 50 weak collisions and 50 strong collisions at the 9-axis data measurement cycle of 10ms and the invocation cycle of 1,000ms. In conclusion, the algorithm proposed is expected to provide more reliable and detailed information than existing algorithm.
홍기현,이종람 대한금속·재료학회 2009 ELECTRONIC MATERIALS LETTERS Vol.5 No.4
Thermally evaporated MoO3 film was deposited to coated indium tin oxide (ITO) anode in organic lightemitting diodes (OLEDs) and its effect on the improvement of electroluminescence were studied. O2 plasma treated ITO (O2-ITO) and MoO3-coated ITO were ex-situ investigated using synchrotron radiation photoemission spectroscopy. The work function of MoO3-coated ITO was higher by 0.35 eV than that of O2- ITO. Thus, the hole injection barrier at the interface could be reduced by the deposition of MoO3, resulting in reduction of operation voltage from 16.5 to 14.6 V at 100 mA/㎠ and enhancement of the electroluminescence property of OLEDs.
홍기현 한국의류학회 1997 한국의류학회지 Vol.21 No.3
Since 1950 postmodernism shows strong influences in literature, architektuTe, art, clothing and other social and cultural fields. It's main conceptswere individual, pluralistic, unconven- tional and deconstruction of social values. The purpose of thisstudy was to review the influence of postmodernism to German clothing for youth. To achieve this purpose, raga- zinesfor youth ("BKAVO") from 1959 to 1994 surveyed including a number of interviews. The characterizations of postmodernism in fashion are as follows: Sport Clothing has an effect on Oaily Clothing. Exotic phenomenon from south america, africa, asia shows strong in fashion. Subculture(Rocker, Hippie, Punker) is as anti-culture sylnbolically expressed in young fashion which is diffrent from mother-fashion. This appeard in Germany in the 50s, 60san6 70s. However, sub-culture-look in the 80s and 90s is presented only in outer style. It does'nt show any symbolic meanings. "Bricolage" ("mix and match") -concept was appeard in 60s and 70s only in fashion of subculture group. This concept generalized in standard fashion in 80s and 90s.andard fashion in 80s and 90s.