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Dye Sensitized Dichromated Gelatin 박막의 홀로그램
임용석,최옥식,곽종훈 嶺南大學校 基礎科學硏究所 1997 基礎科學硏究 Vol.17 No.-
Dichromated gelatin (DCG) film is one of the best holographic recording materials because of its large refractive index changes, high resolution and high sensitivity to blue-green wavelength of light. The environmental stability of DCG film remains as a problem preventing their practical uses. Furthermore, DCG itself is insensitive to light of wavelength region by adding suitable dyes such as methylene blue (MB). However, the absorption of the material inevitably increases as adding MB dye into DCG, which results in attenuated gratings. In this work, we investigate the spectral sensitivity of MB-DCG film and the dependence of diffraction efficiency (DE) on the concentrations of MB for optimum hologram recordings. The experiment results are analysed based on the coupled wave diffraction theory for nonuniform gratings.
Kodak 649F Plates를 이용한 Dichromated Gelatin 홀로그래픽 감광재 처리 방법 연구
임용석,이영락,최옥식 嶺南大學校 基礎科學硏究所 1995 基礎科學硏究 Vol.15 No.-
Dichromated gelatin plays an important role to fabricate various kinds of holographic optical elements. In this study, we have investigated the processing method and the characteristics of dichromated gelatin recording materials by using Kodak 649F plates. The processing methods for obtaining high diffraction efficiencies and environmental stability which are necessary for the fabrication of the holographic optical elements are presented. Exposure characteristics, spectral and angular sensitivity, and the degradation of the diffraction efficiency versus time are measured. The maximum diffraction efficiency of the obtained holographic grating is about 90%.
Time Frequency Domain Reflectometry 기법을 이용한 Coaxial Cable에서의 결함 감지 및 추정
송은석,신용준,최덕선,육종관,박진배,Powers, Edward J. 한국항행학회 2003 韓國航行學會論文誌 Vol.7 No.1
본 논문에서는 도선사에서 발생하는 결함 위치와 이상 유무를 감지하는 새로운 고분해능 반사측정법인 시간-주파수 영역반사측정법 (TFDR, Time-Frequency Domain Reflectometry)을 제안하였다. 고전적인 반사측정법들은 단지 시간 또는 주파수의 한 영역에서 분석되어져 왔으나, 본 논문에서 제시한 TFDR은 도선의 결함 위치와 이상 유무를 발견하기 위해 과도신호의 시간과 주파수 영역의 정보를 동시에 이용할 수 있는 시간-주파수 분석기법으로 특성화하였다. TFDR의 기준신호 설계는 측정 케이블의 물리적 성질들을 고려하여 주파수 밴드를 결정하며, 도선의 결함감지와 추정은 시간-주파수 상호상관관계 함수에 의해 이루어진다. TFDR 시스템을 이용하여 여러 결함 상태를 가진 실제 coaxial cable (RG-142, RG-400)에 대해 실험하였고 정확성을 입증하기 위해 TDR (Time Domain Reflectometry) 장비와 성능은 비교하였다. 본 논문에서는 TFDR이 TDR보다 작은 오차로 결함을 찾아냄을 나타내고 있으며, 측정된 정확도는 TFDR의 오차율이 0.5%이하로 TDR (54750A/54754A) 장비보다 성능이 월등히 우수하다는 것을 알 수 있다. In this paper, a new high resolution reflectometry scheme, time-frequency domain reflectometry (TFDR), is proposed to detect and locate fault in wiring. Traditional reflectometry methods have been achieved in either the time domain or frequency domain only. However, time-frequency domain reflectometry utilizes time and frequency information of a transient signal to detect and locate the fault. The time-frequency domain reflectometry approach described in this paper is characterized by time-frequency reference signal design and post-processing of the reference and reflected signals to detect and locate the fault. Design of the reference signal in time-frequency domain reflectometry is based on the determination of the frequency bandwidth of the physical properties of cable under test. The detection and estimation of the fault on the time-frequency domain reflectometry relies on the time-frequency domain reflectometry is compared with commercial time domain reflectometry (TDR) instrument. In these experiments provided in this paper, TFDR locates the fault with smaller error than TDR. Knowledge of time and frequency localized information for the reference and reflected signal gained via time-frequency analysis, allows one to detect the fault and estimate the location accurately.
P-85 Inflammatory pseudotumor of the lung with extensive metastasis
( Yong Jun Jang ),( Jae Seok Jeong ),( So Ri Kim ),( Seung Yong Park ),( Yeong Hun Choe ),( Yong Chul Lee ) 대한결핵 및 호흡기학회 2017 대한결핵 및 호흡기학회 추계학술대회 초록집 Vol.124 No.-
Inflammatory pseudotumors (IPTs) are rare benign diseases entity of uncertain etiology and involve almost all major organs including the lung. IPTs tend to infiltrate into adjacent tissues, however, limited information exists on the IPTs initially manifesting with distant metastasis. A 66-year-old male presented with cough and hemoptysis for 3 weeks. Chest X-ray showed right hilar enlargement and contrast-enhanced chest computed tomography (CT) showed a mass in the right lower lobe (RLL) with enlargement of lymph nodes (LNs) involving mediastinum and both supraclavicular areas. Transthoracic needle biopsy for the RLL mass revealed that the biopsy samples showed proliferation of plasma cells, fibroblasts and simultaneous infiltration of various inflammatory cells and there was no evidence of malignant cells. Excisional biopsy for right supraclavicular LN and bone biopsy of thoracic vertebra also revealed chronic inflammation, which suggests the infiltration of IPT. Collectively, the patient was diagnosed with metastatic IPT and treated with macrolide and anti-inflammatory drugs including glucocorticoids based on previous reports.
권용석 ( Yong Seok Kwon ),김영 ( Yong Kim ),김양숙 ( Yang Suk Kim ),최정숙 ( Jeong Sook Choe ),이진영 ( Jin Young Lee ) 한국식생활문화학회 2012 韓國食生活文化學會誌 Vol.27 No.6
This study was to examine Kwo-Jung-ryu, a traditional Korean confectionery, made by head families. We examined the materials and recipes of Kwa-Jung-ryu, which were classified into Yumilgwa, Yugwa, Jeonggwa, Dasikgwa, ``Yeot-Gangjeong, Dang (Yeot), and others. There were 13 head families that introduced Kwo-Jung-ryu, two each from Gyeonggi-do, Jeolla-do, and Chuncheong-do, and seven from Gyeongsang-do. There are 33 types of Kwa-Jung-ryu, which averages to about 2.5 types per family. But the Punqsan Ryu, Yeoju Lee, and Andong Kwon families introduced the most Kwa-Jung-ryu with 5 types each. The most popular types of Kwa-Jung-ryu were Yumilgwa, introduced by 7 families (Yokgwa by 6 and Moejokgwo by 1), then Jeonggwa by 6 families (Jeonggwa by 3, Pyeon-gang by 1, and Jeonggwa and Pyeon-gang by 2), and Dasikgwa and other Kwa-Jung-ryu by 5 families (Gotgam-mari by 4 and Seopsonsam by 1). Classifying Kwa-Jung-ryu by recipe, the most frequently introduced were 8 types of Jeonggwa-ryu, 7 types of Yumilgwa, 5 types of Dasikgwa, 3 types of Yeot-Gangjeong and Dang (Yeot), and 2 types of YuGwa.
Small Heterodimer Partner Blocks Cardiac Hypertrophy by Interfering With GATA6 Signaling
Nam, Yoon Seok,Kim, Yoojung,Joung, Hosouk,Kwon, Duk-Hwa,Choe, Nakwon,Min, Hyun-Ki,Kim, Yong Sook,Kim, Hyung-Seok,Kim, Don-Kyu,Cho, Young Kuk,Kim, Yong-Hoon,Nam, Kwang-Il,Choi, Hyoung Chul,Park, Dong H American Heart Association, Inc. 2014 Circulation research Vol.115 No.5
<P><B><U>Rationale</U>:</B></P><P>Small heterodimer partner (SHP; NR0B2) is an atypical orphan nuclear receptor that lacks a conventional DNA-binding domain. Through interactions with other transcription factors, SHP regulates diverse biological events, including glucose metabolism in liver. However, the role of SHP in adult heart diseases has not yet been demonstrated.</P><P><B><U>Objective</U>:</B></P><P>We aimed to investigate the role of SHP in adult heart in association with cardiac hypertrophy.</P><P><B><U>Methods and Results</U>:</B></P><P>The roles of SHP in cardiac hypertrophy were tested in primary cultured cardiomyocytes and in animal models. SHP-null mice showed a hypertrophic phenotype. Hypertrophic stresses repressed the expression of SHP, whereas forced expression of SHP blocked the development of hypertrophy in cardiomyocytes. SHP reduced the protein amount of Gata6 and, by direct physical interaction with Gata6, interfered with the binding of Gata6 to GATA-binding elements in the promoter regions of natriuretic peptide precursor type A. Metformin, an antidiabetic agent, induced SHP and suppressed cardiac hypertrophy. The metformin-induced antihypertrophic effect was attenuated either by SHP small interfering RNA in cardiomyocytes or in SHP-null mice.</P><P><B><U>Conclusions</U>:</B></P><P>These results establish SHP as a novel antihypertrophic regulator that acts by interfering with GATA6 signaling. SHP may participate in the metformin-induced antihypertrophic response.</P>