http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
마이크로 멀티니들을 이용한 고주파 피부미용 의료기기를 위한 출력 장치 개발
김준태(Jun-tae Kim),주규태(Kyu-tai Joo),차은종(Eun Jong Cha),김명미(Myung-mi Kim),정진형(Jin-hyoung Jeong) 한국정보전자통신기술학회 2021 한국정보전자통신기술학회논문지 Vol.14 No.5
고령사회의 진입과 인간의 평균 수명이 연장되고, 여성의 사회적 진출 및 남성들의 외모에 대한 관심증가, 미디어 매체를 통한 K-문화가 전 세계적으로 관심을 받으면서 자연스럽게 관심은 K-Bueaty에 집중되고 있다. 최근, 의료관광 분야의 점유를 보면 성형 및 피부과와 같은 피부미용 의료관광의 경우 중국, 일본 등 아시아뿐만 아니라 북미, 유럽 등에서 인기를 누리고 있다. 사람의 노화를 가장 먼저 외면적으로 확인할 수 있는 부위는 바로 얼굴의 피부 주름이다. 깨끗하고 주름이 없으면서 탄력성 있는 건강한 피부는 대부분의 사람들이 원하는 바람이다. 대표적으로 집속형초음파자극(HIFU:High Intensity Focused Ultrasound)와 저주파, 고주파(RF:Radio Frequency), 미세전류를 이용한 갈바닉 테라피, 급속 냉각을 이용한 크라이오 테라피 등 피부의 컨디션과 상태에 따라 관리하는 방식이 달라지며, 같은 기전을 이용한 의료기기 및 피부미용 기기의 시술 역시 출력 및 자극 부위 등에 따라 시술의 효과가 차이가 난다. 본 연구는 수많은 피부미용 의료기기 및 미용기기 중 마이크로니들을 이용한 침습형 고주파 피부 의료기기를 개발하고자 국제규격인 IEC 60601-2(의료기기개별기준규격)및 MFDS(Ministry of Food and Drug Safety : 식품의약품안전처)에서 고시한 고주파 자극기 기준 규격을 준수한 고주파 출력 장치를 설계 및 개발하였다. 회로 설계는 Class-A Topology를 이용한 증폭장치(AMP:Amplifier)와 Half-Bridge Topology를 이용한 전원장치로 이루어져 있다. 개발된 고주파 출력 장치를 측정한 결과 평균 63.86%의 효율을 얻었으며, 최대출력은 116.7W, 50.67dBm으로 측정되었다. The entry of an aging society and the extension of human life expectancy, the increasing interest in women"s social advancement and men"s appearance, and the natural interest in K-culture through media media, while receiving worldwide attention, Focus on K-Bueaty. Recently, looking at the occupation of the medical tourism field, in the case of aesthetic medicine tourism such as molding and dermatology, it has gained popularity not only in Asia such as China and Japan, but also in North America and Europe. The first external confirmation of human aging is the wrinkles on the skin of the face. Clean, wrinkle-free, elastic and healthy skin is a desire of most people. Skin condition and condition such as focused ultrasonic stimulation (HIFU: High Intensity Focused Utrasound) and low frequency, high frequency (RF: Radio Frequency), galvanic therapy using microcurrent, cryotherapy using rapid cooling, etc. Depending on the method of management, the effect of the treatment differs depending on the output and the stimulation site, etc., even in the treatment of medical equipment and beauty equipment using the same mechanism. In this research, in order to develop invasive high-frequency dermatological devices using a large number of beauty medical devices and microneedles of beauty devices, the international standards IEC 60601-2 (standards for individual medical devices) and MFDS (Ministry of) We designed and developed a high-frequency output device in compliance with the high-frequency stimulation standard announced in the Food and Drug Safety (Ministry of Food and Drug Safety). The circuit design consists of an amplifier (AMP: Amplifier) using Class-A Topology and a power supply device using Half-Bridge Topology. As a result of measuring the developed high-frequency output device, an average efficiency of 63.86% was obtained, and the maximum output was measured at 116.7W and 50.67dBm.
김정호,김준태,김진오,민진기,Kim, Jung-Ho,Kim, Jun-Tai,Kim, Jin-Oh,Min, Jin-Ki 대한기계학회 1997 大韓機械學會論文集A Vol.21 No.10
The acoustic characteristics of a direct radiator type loudspeaker has been studied in this paper. The natural modes of the speaker cone vibration analyzed numerically by the finite element method have been verified by comparing them with experimental results. The so-ap-proved finite-element model has been used to calculate the vibration response of the cone excited by the voice coil. The vibration displacement of the speaker cone paper has been converted into the vibration velocity and used as a boundary condition for the acoustic analysis. The frequency characteristics, directivity, and sound pressure distribution of the loudspeaker have been calculated by the boundary element method. The numerical results have been verified by the experiments carried out in an anechoic chamber. The variations of the acoustic characteristics due to the changes of some design parameter values can be examined using the numerical model.
有機色素分子와 陰이온 界面活性劑 사이의 相互作用에 關한 吸收分光學的 硏究
송기동,김일두,박성규,김준태,김성현 조선대학교 기초과학연구소 1990 自然科學硏究 Vol.13 No.1
The metachromatic behavior of methylene blue (MB) ia aqueous solution and in the presense of sodium dodecyl sulfate (SDS) have been studied by the absorption spectroscopic method. The results are as follows. The association force of the MB molecules in aqueous solution seems to be complex of three factors, i.e., London's dispersion force, the hydrophobic interaction and the interaction between permanent dipoles it has been measured of critical micelle concentration (CMC) in aqueous solution of SDS and that of MB-SDS to be 8.0mM and 7.9mM respectively. This indifference between CMC values of the pure SDS and MB-SDS system would mean the formation of dye-rich induced micelles(drim). The spectral changes of MB-SDS system with the addition of the inorganic salts have been observed. The addition of the salt into the solution causes the redistribution of MB molecules in the complex(D_n^+ S_m^-). It would be resulted from the decrease of the stacking effect between the bound MB molecules. The spectral changes observed in the MB-SDS system with the increase of the S/D values are analyzed and the behavior of the meta band is explainsd in terms of the stacking theory and micelle formation theory