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New Unsupervised Classification Technique for Polarimetric SAR Images
( Yi Sok Oh ),( Kyung Yup Lee ),( Ge Ba Jang ) 대한원격탐사학회 2009 大韓遠隔探査學會誌 Vol.25 No.3
A new polarimetric SAR image classification technique based on the degree of polarization (DoP) and the co-polarized phase-difference (CPD) is presented in this paper. Since the DoP and the CPD of a scattered wave provide information on the randomness of the scattering and the type of scattering mechanisms, at first, the statistics of the DoP and CPD are examined with measured polarimetric SAR image data. Then, a DoP-CPD diagram with appropriate boundaries between six different classes is developed based on the SAR image. The classification technique is verified using the JPL AirSAR and ALOS PALSAR polarimetric data. The technique may have capability to classify an SAR image into six major classes; a bare surface, a village, a crown-layer short vegetation canopy, a trunk-layer short vegetation canopy, a crown-layer forest, and a trunk-dominated forest.
<i>K</i>-dimensional trio coherent states
Yi, Hyo Seok,Nguyen, Ba An,Kim, Jaewan The Institute of Physics 2004 Journal of physics A, Mathematical and general Vol.37 No.45
<P>We introduce a novel class of higher-order, three-mode states called <I>K</I>-dimensional trio coherent states. We study their mathematical properties and prove that they form a complete set in a truncated Fock space. We also study their physical content by explicitly showing that they exhibit nonclassical features such as oscillatory number distribution, sub-Poissonian statistics, Cauchy–Schwarz inequality violation and phase-space quantum interferences. Finally, we propose an experimental scheme to realize the state with <I>K</I> = 2 in the quantized vibronic motion of a trapped ion.</P>
광주지역에서 즉석 제조ㆍ판매하는 식육가공품의 안전성 조사
고바라다 ( Ba-ra-da Koh ),서은주 ( Eun-ju Seo ),안아진 ( Ah-jin Ahn ),정보람 ( Bo-ram Jung ),하이든 ( Yi-deun Ha ),서두리 ( Doo-ri Seo ),임진택 ( Jin-taek Lim ),김용환 ( Yong-hwan Kim ),김은선 ( Eun-sun Kim ) 한국가축위생학회 2017 韓國家畜衛生學會誌 Vol.40 No.1
The main goal of this survey was to assess the current sanitation status and safety standards of meat processed products purchased at instant meat sales and processing operators. Analyses were carried out from April to September in 2016 in Gwangju area, Republic of Korea. A total number of 150 samples including seasoned meats, ground meat products, meat extract products, heated seasoned meats, sausages and hams from 35 butcher shops was collected. The number of inappropriate cases was revealed eleven cases (7.3%) in total viable count of bacteria (TVC), total coliform counts (TCC) and Listeria monocytogenes. The reported data indicate that more systemic and technical guidance is needed to monitor instant meat sales and processing operators in order to guarantee safety of meat processed products.
New Unsupervised Classification Technique for Polarimetric SAR Images
Oh, Yi-Sok,Lee, Kyung-Yup,Jang, Ge-Ba The Korean Society of Remote Sensing 2009 大韓遠隔探査學會誌 Vol.25 No.3
A new polarimetric SAR image classification technique based on the degree of polarization (DoP) and the co-polarized phase-difference (CPD) is presented in this paper. Since the DoP and the CPD of a scattered wave provide information on the randomness of the scattering and the type of scattering mechanisms, at first, the statistics of the DoP and CPD are examined with measured polarimetric SAR image data. Then, a DoP-CPD diagram with appropriate boundaries between six different classes is developed based on the SAR image. The classification technique is verified using the JPL AirSAR and ALOS PALSAR polarimetric data. The technique may have capability to classify an SAR image into six major classes; a bare surface, a village, a crown-layer short vegetation canopy, a trunk-layer short vegetation canopy, a crown-layer forest, and a trunk-dominated forest.
장지성 ( Ge Ba Chang ),양찬수 ( Chan Su Yang ),오이석 ( Yi Sok Oh ) 大韓遠隔探査學會 2007 大韓遠隔探査學會誌 Vol.23 No.6
본 연구에서는 합성개구레이더(synthetic aperture radar, SAR) 영상의 보정에 사용되고 있는 반사기(corner reflector, CR)를 이용하여 목표물의 식별과 인식을 위한 기초적인 연구를 실시하였다. 사각형 삼면 전파반사기를 기반으로 전방향(omni-directional) 반사기를 제작하였다. 여기서는 한 변의 길이가 15cm인 4-배열 사각형 삼면 전파반사기를 사용하여 C-밴드(주파수: 5.3 GHz) 의 편파별(VV, HH, VH, HV) RCS(radar cross section)특성을 해석하였다. 전파반사기는 대칭형이므로 방위각 180도 범위에 대해서 레이더 산란단면적 패턴을 측정하였다. VV편파의 경우 방위각에 따른 RCS값의 차이가 8dB정도로 다른 편파보다 전방향 특성이 더 좋은 것으로 확인되었고 방위각이 0˚(단면과 동일 방향)와 45˚(이웃하는 단면들의 중앙) 일 때, 가장 높은 RCS값을 보였다. 또한, 실험에서 얻어진 RCS값을 수치 해석 시뮬레이션과 이론적 계산과 비교를 실시한 결과, 서로 잘 일치하는 것으로 나왔다. Basic research is conducted to identify a target using corner reflectors which are commonly used in calibration of synthetic aperture radar (SAR) systems. At first, an omni-directional reflector is fabricated by combining four 15-cm rectangular trihedral corner reflectors. Then, its radar cross section (RCS) characteristics are measured at C-band (5.3 GHz) for vv-, hh-, hv-, and vh-polarizations at a range of horizontal angle, -90˚≤Φ≤90˚. The measured RCS angular variation of the omni-directional reflector is much smaller for vv-polarization than other polarizations, and the difference between the maximum and minimum RCSs for vv-polarization is about 8 dB. Peak RCS values are shown at 0˚ (normal to plates) and 45˚ (direction of bore sight). It is shown that the measurements agree quite well with numerical simulation and theoretical computation results.
Li, Hong-Li,Huang, Ding-Zhi,Deng, Ting,Zhou, Li-Kun,Wang, Xia,Bai, Ming,Ba, Yi Asian Pacific Journal of Cancer Prevention 2012 Asian Pacific journal of cancer prevention Vol.13 No.4
Cyclin L2 is a novel member of the cyclin family, recently implicated in the regulation of cell cycle progression and/or transcriptional regulation. The present study was undertaken to investigate the effects of overexpression on tumor cell growth and chemosensitivity in human gastric cells in vitro. Cyclin L2 was transfected into human gastric cancer cell line BCG823 and expressed with a mammalian expression vector pcDNA3.1. The effects and mechanisms of cyclin L2 on cell growth, cell cycling and apoptosis were studied. Compared to control vectors, overexpression of cyclin L2 inhibited the growth of BCG823 cells and enhance their chemosensitivity to fluorouracil, docetaxel and cisplatin. The anti-proliferative effects of cyclin L2 could be due to G0/G1 arrest and apoptosis. Cyclin L2 induced G0/G1 arrest and apoptosis involved upregulation of caspase-3 and down regulation Bcl-2 and survivin. The results indicated that overexpression of cyclin L2 protein may promote efficient growth inhibition and enhance chemosensitivity to chemotherapeutic agents in human gastric cancer cells by inducing G0/G1 cell cycle arrest and apoptosis.
Kim, Sung Bae,Sayeed, Ahmed,Villalon, Antonio H,Shen, Zhen Zhou,Yau, Tsz Kok,Shah, Mazhar Ali,Hou, Meng Feng,Thuan, Tran Van,Ba, Duc Nguyen,Chao, Tsu-Yi Asian Pacific Journal of Cancer Prevention 2016 Asian Pacific journal of cancer prevention Vol.17 No.2
Background: The Asia-Pacific Breast Initiatives (APBI) I and II registries were established to collect safety data for patients with early stage breast cancer receiving adjuvant docetaxel-based regimens in the Asia-Pacific region. Materials and Methods: Data from the two registries were combined to perform a safety analysis. Participants in the registry were women with early stage operable breast cancer with an intermediate or high risk of recurrence. These women received adjuvant chemotherapy that included docetaxel between 2006 and 2011. Adverse events (AEs) were recorded and analyzed. Results: Data were collected from 3,224 patients from 13 countries. The mean dose intensity of docetaxel was 24.1, 22.7, $25.1mg/m^2/week$ among patients receiving docetaxel-based monotherapy, combination therapy and sequential therapy, respectively. Granulocyte colony-stimulating factor (G-CSF) was given with docetaxel to 41.8% of women and 20.6% of women receiving prophylactic antibiotics. Adverse events were reported in 86% of patients (anthracycline-containing regimens vs. non-anthracycline regimens; 87% vs. 80%). The most common adverse events were alopecia, nausea, neutropenia, vomiting, and myalgia. Adverse events NCI CTCAE ${\geq}$Grade 3 were reported in 45.4% of patients. Serious adverse events were reported in 13% of patients, of which 2.5% led to study discontinuation. Forty-six deaths (1.4%) were reported, with no significant difference between regimens. Conclusions: The safety parameters of adjuvant docetaxel therapy used to treat sequential Asian women were comparable to those reported in clinical trials evaluating the role of adjuvant docetaxel. No unusual adverse events linked to Asia-Pacific region patients were observed.