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이슬비(Seul Bee Lee),이예원(Ye Won Lee),이호연(Ho Yeon Lee),임효현(Hyo Hyun Lym),김준형(Jun Hyung Kim),김민선(Min Sun Kim) 한국산학기술학회 2015 한국산학기술학회 학술대회 Vol.2015 No.1
문화와 관광이 각광받고 있는 지금, 그 소비의 주체인 관광소비자의 행동과 이들의 행동을 이끌 국가와 기업에서 실시하고 있는 다양한 마케팅 방법 중 문화관광 마케팅이 관광소비자의 행동에 미치는 영향을 사례를 통해 분석하였다. 이를 통해 각 관광소비자의 행동을 분석하는 것과 통합적인 데이터베이스를 구축하여 보다 거시적인 시각에서 고객행동을 분석하여 세분화된 시장으로 접근해야 함을 조언한다.
직교 입력 편광에 따른 위상 천이 장주기 격자의 pH 및 온도 응답에 관한 연구
이슬이(Seul-Lee Lee),이용욱(Yong Wook Lee) 한국조명·전기설비학회 2021 조명·전기설비학회논문지 Vol.35 No.3
In this paper, we demonstrated an optical fiber sensor based on a phase-shifted long-period fiber gratin g (PS-LPFG) that could realize simultaneous measurement of surrounding pH and temperature variations. The PS-LPFG composed of a grating-free fiber region (GFFR) in the middle of two identical LPFGs was fabricated on high-birefringence fiber (HBF) with CO₂ laser pulses. In addition, a π phase shift formed by setting the length of the GFFR as half of the grating period of an LPFG allows a transmission dip to split into two attenuation bands at two different resonance wavelengths. Since HBF can preserve a linear state of polarization (SOP) if the input SOP is aligned with one of its two principal axes (fast or slow axis), a PS-LPFG inscribed on HBF (HB-PS-LPFG) can create two different transmission spectra for two orthogonal input SOPs, i.e., linear horizontal polarization (LHP) and linear vertical polarization (LVP). To investigate pH and temperature responses of the fabricated HB-PS-LPFG, the dip wavelength separation bet ween two different attenuation bands was used as a sensor indicator for an LHP or LVP input SOP. Consequently, pH- and temperature-induced wavelength variations of the two sensor indicators showed linear and independent spectral responses to both pH and temperature variations in a pH range from 3 to 11 and a temperature range from 25 to 65 °C. With these unique pH or temperature responses of the two sensor indicators, the fabricated sensor could realize simultaneous measurement of pH and temperature.
병원성 박테리아 검출용 헤테로다인 복조 기반 광섬유 바이오 센서
이슬이(Seul-Lee Lee),고영종(Youngjong Ko),김장현(Jang Hyun Kim),강현욱(Hyun Wook Kang),이용욱(Yong Wook Lee) 한국조명·전기설비학회 2020 조명·전기설비학회논문지 Vol.34 No.11
In this paper, we demonstrated an optical fiber biosensor based on heterodyne demodulation to detect five pathogenic bacteria species forming biofilms, such as Escherichia Coli, Vibrio Vulnificus, Pseudomonas Aeruginosa, Staphylococcus Aureus, and Streptococcus Iniae, with their fluorescence characteristics. The proposed sensor detects the fluorescence of the five bacteria species with the intrinsic fluorescence characteristics of amino acid tryptophan, whose excitation and emission wavelengths are 280 and 350 nm, respectively. The fabricated sensor consists of an UV light source for excitation of bacteria, a high sensitivity detector for detection of fluorescence signals emitted from the excited bacteria, and a lock-in amplifier for amplification of the detected fluorescence signals. The lock-in amplifier can remove various noise signals coupled with the desired fluorescence signals and amplify the magnitude of the desired signal through the heterodyne demodulation technique. This signal processing technique enables the detection of the weak picowatt (pW) fluorescence signals. Consequently, it is concluded that our sensor can successfully detect the intensity of the fluorescence signal emitted from five pathogenic bacteria species whose concentration lies within 10² to 10<SUP>7</SUP> CFU/ml.
소화기 질환을 대상으로 한 3개 한의학파의 다빈도 병증 및 처방 비교 연구
이슬,예상준,장호,이용재,박지은,채한,이정윤,Lee, Seul,Yea, Sang-Jun,Jang, Ho,Lee, Yong-jae,Park, Jieun,Chae, Han,Lee, Jeongyun 사상체질의학회 2020 사상체질의학회지 Vol.32 No.2
Objectives The aim of this study is to analyze the therapeutic direction and characteristics of gastrointestinal diseases by three societies of Korean medicine by comparing the frequent disease patterns and prescriptions of them. Methods The experts of the three societies of Sasang constitutional medicine, Hyungsang medicine and Sanghan-GeumGwe medicine discussed and confirmed a list of clinical data to make use for diagnosis. Then, clinical data on 200 patients suffering from gastrointestinal symptoms were collected. The each experts diagnosed appropriate disease patterns and decided prescriptions according to the method of their affiliated society. Results and Conclusions The three different societies' experts showed the similarity in the sense of categorizing disease patterns focusing on the specific physiology and pathology of the patients, while the each societies have different diagnosis systems. Treating chronic gastrointestinal patients, they treated the mental or psychological symptoms of the patients as well as their physical problems. Based on this study, it is necessary to develop a systematic and precise research model to objectively and statistically analyze the correlation of disease patterns and prescriptions by different societies.