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폴리비닐피롤리돈이 코팅된 마하젠더 간섭계 기반의 평판형 광도파로 습도센서
김주하,김명진,정은주,황성환,이우진,최은서,노병섭,Kim, Ju Ha,Kim, Myoung Jin,Jung, Eun Joo,Hwang, Sung Hwan,Lee, Woo Jin,Choi, Eun Seo,Rho, Byung Sup 한국광학회 2013 한국광학회지 Vol.24 No.5
In this paper, the characteristics of a humidity sensor implemented by Mach Zehnder Interferometer (MZI) in a Planar Lightwave Circuit (PLC) have been designed and demonstrated. The humidity outside is detected with polyvinylpyrrolidone (PVP) coated on the etched arm of the MZI. The length of the etched arm is 10 mm and the PVP was coated by dip-coating into the etched region. As the refractive index of the PVP changes with the surrounding humidity, the PVP-coated humidity sensor presented changes in the interferogram depending on RH (Relative Humidity) around the PLC. The measured results show that the proposed humidity sensor works successfully in the range of 30% to 80% of RH. 본 논문에서는 평판형 광도파로 상에 마하젠더 간섭계를 형성한 습도센서의 특성을 제시하고자 한다. 평판형 광도파로의 마하젠더 간섭계의 한쪽 팔에 PVP를 코팅함으로써 센서 주변의 외부 습도를 측정하였다. 습도를 계측할 간섭계의 한쪽 팔은 10 mm 폭으로 에칭하고, 에칭된 곳에 폴리비닐피롤리돈 (PVP)를 코팅하였다. PVP는 습도변화에 의해서 굴절률의 변화가 일어나므로, PVP로 코팅된 습도 센서는 평판형 광도파로 근처 상대습도의 차이에 따라 광간섭무늬의 변화를 나타내었다. 이에 대한 측정 결과를 통해 30%~80% 상대습도 범위에서 습도센서로써 작동함을 확인할 수 있었다.
김주하 ( Joo Ha Kim ),신원웅 ( Won Ung Shin ),백유상 ( Yoo Sang Baek ),오칠환 ( Chil Hwan Oh ),김재환 ( Jae Hwan Kim ) 대한피부과학회 2012 대한피부과학회지 Vol.50 No.9
Leukocytoclastic vasculitis is a small vessel inflammatory disease mediated mostly by deposition of immune complexes. Etanercept (Enbrel®) is widely used not only for rheumatic disorders such as ankylosing spondylitis but also for dermatological diseases including psoriasis. Adverse drug reactions including pruritus, angioedema, and skin cancer have been reported. A 35-year-old female presented with palpable purpuric patches that developed on both lower legs 10 months after etanercept administration. A skin biopsy showed characteristic features of leukocytoclastic vasculitis, including perivascular infiltration of neutrophils and lymphocytes with leukocytoclasia and fibrinoid necrosis of the vessel wall. The patient was treated with oral and topical steroids, and the response was excellent and rapid. The patient was administered etanercept to control underlying ankylosing spondylitis. The skin lesions disappeared gradually after 4 weeks, and no other lesions were seen. The number of patients using etanercept has been increasing thus, the possibility of leukocytoclastic vasculitis in patients using etanercept should be considered.
광섬유 패치코드를 이용한 Fabry-Perot 간섭계 온도센서
김주하 ( Ju Ha Kim ),정은주 ( Eun Joo Jung ),김명진 ( Myoung Jin Kum ),김계원 ( Gye Won Kim ),노병섭 ( Byung Sup Rho ),최은서 ( Choi Eun Seo ),황성환 ( Hwang Sung Hwan ),이우진 ( Lee Byung Ing Go ),안종배 ( Jong Bae An ) 한국센서학회 2014 센서학회지 Vol.23 No.2
In this paper, we propose and demonstrate a Fabry-Perot interferometer (FPI) optical fiber tip sensor fabricated by a blade-sawing technique using a fiber optic patch cord for high-resolution temperature measurement. The sensor head consists of a short air FP cavity near the tip of a single-mode fiber patch cord tip. The temperature which we can measure is determined through a phase variation of the interference fringes in the reflective spectrum of the sensor. The fiber optic FPI sensor in this work can monitor the environmental temperature very accurately from 40 to 120oC. As a result, the temperature sensitivity is obtained as 38.2 pm/oC.
발바닥에 발생한 항Ro 및 항La 항체 양성과 연관된 윤상 홍반
백유상 ( Yoo Sang Baek ),김주하 ( Joo Ha Kim ),신원웅 ( Won Ung Shin ),김재환 ( Jae Hwan Kim ),송해준 ( Hae Jun Song ),오칠환 ( Chil Hwan Oh ) 대한피부과학회 2012 대한피부과학회지 Vol.50 No.4
Recurrent annular erythema associated with anti-Ro/La antibody is a diagnostic term for annular erythemas that usually occurs in the face and the upper extremities of patients with positive anti-Ro/La antibodies. They have been reported in patients with Sjogren`s syndrome, lupus erythematosus, or Sjogren`s syndrome/systemic lupus erythematosus syndrome. Recently, there have been cases without any underlying autoimmune diseases. We, hereby, report an annular erythema, associated with anti-Ro/La antibody occurring in both soles, which is an unusual location for this disease. (Korean J Dermatol 2012;50(4):350∼353)
백유상 ( Yoo Sang Baek ),이정우 ( Jung Woo Lee ),안재우 ( Jae Woo Ahn ),김주하 ( Joo Ha Kim ),전지현 ( Jiehyun Jeon ),송해준 ( Hae Jun Song ),오칠환 ( Chil Hwan Oh ) 대한피부과학회 2014 대한피부과학회지 Vol.52 No.5
Squamous cell carcinoma (SCC) of the maxillary sinus is the most common malignant neoplasm of the paranasal cavity. The most frequent initial symptoms are swelling of the cheek, nasal obstruction, epistaxis, and nasal discharge. Herein, we report the case of a 62-year-old Korean male who initially presented with a whitish irregular depressed plaque with an indurated border in his left cheek. After a several-week delay in diagnosis, he was eventually diagnosed with maxillary sinus carcinoma. (Korean J Dermatol 2014;52(5):349∼352)