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Structures of SrO-B2O3-SiO2 Glasses using IR, Hardness, and Refractive Index (IR, 경도 그리고 굴절률에 의안 SrO-B2O3-SiO2 유리들의 구조)

  • Moon, Seong Jun;Kim, Hyun Teh;Shim, Moon Sik;Park, Kwang Ho
    • Journal of Korean Ophthalmic Optics Society
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    • v.7 no.1
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    • pp.57-61
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    • 2002
  • Ternary $SrO-B_2O_3-SiO_2$ glasses were fabricated as a function of R(${\equiv}SrO\;mole%/B_2O_3\;mole%$) and K(${\equiv}SiO_2\;mole%/B_2O_3\;mole%$). The structures of these glasses were investigated through Infrared transmittance, vicker's hardness, and refractive index. The results indicated : First, in the infrared transmittance spectra, when R increased, the intensities of the absorption bands around $1200{\sim}1600cm^{-1}$ resulting from the B-O stretching vibration bond in the symmetrical trigonal $BO_3$ units decreased, and these of the absorption bands around $800{\sim}1200cm^{-1}$ caused by the B-O stretching vibration bond of the tetrahedral $BO_4$ units varied. Also, the intensities of the absorption bands for the B-O stretching vibration bond in trigonal $BO_3$ units increased and these of the bands for B-O stretching vibration bond in tetrahedral $BO_4$ units decreased as K increased. Second, the increase and the decrease of vicker's hardness values for these glasses depended on the fraction of $BO_4$ units and it of $BO_3$ units, respectively. The refractive index of these glasses mostly depended on the SrO contents and only slightly depended on the fraction of $BO_4$ and $BO_3{^-}$ units.

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A Study of Prescriptions of Head Part in DongEuiBoGam (동의보감(東醫寶鑑) 외형편(外形篇) 권(卷)1 [두(頭)]부분 관련처방의 재해석)

  • Park, Sun-Dong
    • Herbal Formula Science
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    • v.15 no.1
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    • pp.37-47
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    • 2007
  • 許浚(Heo Jun), the best physician on his day, wrote 東醫寶鑑(DongEuiBoGam, 1613) based on his clinical experience as a court doctor and life-long study of over 500 medical books. Now most clinicians consult 東醫寶鑑(DongEuiBoGam) for its practicality. And it is also considered as one of the most valuable medical books for basic medical studies. As 許浚(Heo Jun) mentioned on the 東醫寶鑑(DongEuiBoGam) preface. we should practice flexibility on the interpretation of the medical classics instead of binding ourselves to the precedents. But worship of 東醫寶鑑(DongEuiBoGam) may hinder the studying of new pathways. The treatment and its understandings of a disease should be based on objectivity of observation. Finding the common traits of the recipes in 東醫寶鑑(DongEuiBoGam) is important for the study of 東醫寶鑑(DongEuiBoGam). Accordingly, group synthesis of symptoms and resultant classification of recipes are vital. In this research, symptoms listed in the head part(頭門) of External Shape vol. I(外形篇 卷1) of 東醫寶鑑(DongEuiBoGam) are synthesized into 3 different parts: head-wind syndrome(頭風證), dizziness(眩暈), headache(頭痛). Classification of prescriptions according to these 3 parts is also suggested.

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A Study of Prescriptions of Fire Part in DongEuiBoGam (병증에 따른 동의보감(東醫寶鑑) 잡병편(雜病篇) 화문(火門) 처방의 분류와 분석)

  • Kwon, Hyun-Bum;Park, Sun-Dong
    • Herbal Formula Science
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    • v.16 no.2
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    • pp.71-90
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    • 2008
  • 東醫寶鑑(DongEuiBoGam) is considered as one of the most valuable medical books for Korean traditional medicine. Since 許浚(Heo Jun), the best physician on his day, wrote 東醫寶鑑(DongEuiBoGam), it has been not only a guidebook for basic medical studies, but also a field manual for clinicians. 東醫寶鑑(DongEuiBoGam) is a medical encyclopedia which integrated more than 81 medial classics. And its contents is well organized according to the symptoms of each disease. So today most clinics refer to 東醫寶鑑(DongEuiBoGam). But if we just read 東醫寶鑑(DongEuiBoGam) and use the prescriptions without understanding, the effect of medicine will be reduced by half. We should totally understand recipes in 東醫寶鑑(DongEuiBoGam) and be able to change the recipes according to the symptoms of each patient's disease. So finding the common traits of the recipes in 東醫寶鑑(DongEuiBoGam) is very important. In this research, the recipes of the fire part(火門) of Various Disease vol. Ⅲ(雜病篇 卷之三) are analyzed according to the traits of each herb in the recipes. And new classification of prescriptions according to the community of their traits is also suggested.

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LiMnBO3/C: A Potential Cathode Material for Lithium Batteries

  • Aravindan, V.;Karthikeyan, K.;Amaresh, S.;Lee, Y.S.
    • Bulletin of the Korean Chemical Society
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    • v.31 no.6
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    • pp.1506-1508
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    • 2010
  • $LiMnBO_3$ was successfully synthesized by a solid-state reaction method both with and without a carbon coating. Adipic acid was used as source material for the carbon coating. $LiMnBO_3$ was composed of many small polycrystalline particles with a size of about 50 - 70 nm, which showed a very even particle morphology and highly ordered crystalline particulates. Whereas the carbon coated $LiMnBO_3$ was well covered by mat-like, fine material consisting of amorphous carbon derived from the carbonization of adipic acid during the synthetic process. Carbon coated cell exhibited improved and stable discharge capacity profile over the untreated. Two cells delivered an initial discharge capacity of 111 and 58 mAh/g for $LiMnBO_3$/C and $LiMnBO_3$, respectively. Carbon coating on the surface of the $LiMnBO_3$ drastically improved discharge capacity due to the improved electric conductivity in the $LiMnBO_3$ material.

A study on Dong-Eue-Bo-Gam(東醫寶鑑) Dan-Bang-Mun(單方門) (동의보감(東醫寶鑑) 단방(單方)에 관한 연구)

  • Kim, Dae-Sik;Yoon, Chang-Yeol
    • Journal of Haehwa Medicine
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    • v.16 no.2
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    • pp.7-12
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    • 2007
  • This paper is study on Dong-Eue-Bo-Gam(東醫寶鑑) Dong-Eue-Bo-Gam(單方門)that is written by Heo-Joon. When Heo-Joon worte Dong-Eue-Bo-Gam(東醫寶鑑) between 1596 and 1610, it was the time for the people's healthy to be threatened by all kinds of infections and malnutrition. Dong-Eue-Bo-Gam(東醫寶鑑) compiled Chinese medical books and our medical books that still exists systematically. Especially there was Dan-Bang-Mun(單方門), medical art that is to use only one herb, at the end of each chapter for the people to treat disease. There was Tang-Aek-Pyun the end of Dong-Eue-Bo-Gam(東醫寶鑑). In this part, as it says herbs in rural areas were written in details, it was easy for everyone to get herbs to prevent any disease and to treat their sickness. That's why I'd like to succeed to our senior doctors' spirit for the medicine. So I decided to study Tang-Aek-Pyun that is based on Dan-Bang-Mun in Dong-Eue-Bo-Gam(東醫寶鑑) and many herbs that refer to the 4th of Gang-Je-By-Geup(廣濟秘笈). Medicine that was introduced in Dan-Bang-Mun(單方門) was 860 kinds of medicine. Among them, I choose about 3 kinds of medicine that was used the most frequently.

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Systematic review on the DongUiBoGam in the Korean Medicine Journal (국내 한의학 학술지에 발표된 동의보감 연구 현황 조사)

  • Han, Chang-hyun;Park, Sang-young;Kwon, Oh-min;Ahn, Sang-young;Ahn, Sang-woo
    • The Journal of Korean Medical History
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    • v.22 no.2
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    • pp.7-13
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    • 2009
  • Background : To understand Korean medicine it is crucial to first understand medical aspect of 'DongUiBoGam'. It is also meaningful that it became one of the influential book even to posterity. Also based on the apprehension, we can take a view of development of Korean medicine led by 'DongUiBoGam'. Objectives : This study aims to review the status, study field, specialist of DongUiBoGam. In the process, this review will grasp trends in this field of studies and will direct further researches into the right direction. Method : The computerized Korean databases were searched from their respective inceptions up to December 2008. The search terms used were 'DongUiBoGam' and random or Korean language terms related to DongUiBoGam. Several specialized journals were also manually searched for relevant articles. Result : Since the 2000s, DongUiBoGam papers in the Korean Literature is increased. Published 58 papers on The Korean Journal of Oriental Medical Prescription were more than the other journals. 58 papers published in The Korean Journal of Oriental Medical Prescription are the best in many areas related to Korean medicine. Most people have submitted papers related to DongUiBoGam was Woo-yeal Jeong. Conclusions : 'DongUiBoGam' research is conducted and current tendency and outlook for 'DongUiBoGam' is carried out focusing on several associations.

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A Fundamental Study of Structure-Property Relationships in $Eu^{3+}$ Luminescence ($Eu^{3+}$ 이온의 발광성에 대한 구조와 성질의 기본적인 연구)

  • Chang, Ki-Seog
    • Korean Journal of Crystallography
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    • v.13 no.1
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    • pp.25-30
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    • 2002
  • The M/sub 1-x/Na/sub 2x/Al₂(BO₃)₂O (M = Ca and Sr) solid solution systems have been shown interstitial solid solutions and continuous substitutional solid solutions. The symmetry around the Eu site of yEu/sup 3+/ : M/sub 1-x/Na/sub 2x/Al/sub 2-y/Mg/sub /(BO₃)₂O (M = Ca and Sr) changes the intensities and the chromaticities of transitions. The Eu/sup 3+/ion can be very bright and efficient and have the desired emission wave-length depending on the site symmetry of the Eu/sup 3+/ion site. As the amount of Na in the Eu/sup 3+/ion doped Ca/sub 1-x/Na/sub 2x/Al₂(BO₃)₂O system increases, the Eu site symmetry is going to be a noncentrosymmetric site. With increasing x, the decreased intensity in the /sup 5/D/sub 0/→/sup 7/F₁(590 nm) transition relates to the low symmetry of the Eus/up 3+/-doped Ca/sub 1-x/Na/sub 2x/Al₂(BO₃)₂O system, because of the Ca-centered octahedron in the CaAl₂(BO₃)₂O compound. The SrAl₂(BO₃)₂O compound also provides an improved chromaticity due to the lower site symmetry of Eu/sup 3+/ion.

Medical Image Classification and Retrieval Using BoF Feature Histogram with Random Forest Classifier (Random Forest 분류기와 Bag-of-Feature 특징 히스토그램을 이용한 의료영상 자동 분류 및 검색)

  • Son, Jung Eun;Ko, Byoung Chul;Nam, Jae Yeal
    • KIPS Transactions on Software and Data Engineering
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    • v.2 no.4
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    • pp.273-280
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    • 2013
  • This paper presents novel OCS-LBP (Oriented Center Symmetric Local Binary Patterns) based on orientation of pixel gradient and image retrieval system based on BoF (Bag-of-Feature) and random forest classifier. Feature vectors extracted from training data are clustered into code book and each feature is transformed new BoF feature using code book. BoF features are applied to random forest for training and random forest having N classes is constructed by combining several decision trees. For testing, the same OCS-LBP feature is extracted from a query image and BoF is applied to trained random forest classifier. In contrast to conventional retrieval system, query image selects similar K-nearest neighbor (K-NN) classes after random forest is performed. Then, Top K similar images are retrieved from database images that are only labeled K-NN classes. Compared with other retrieval algorithms, the proposed method shows both fast processing time and improved retrieval performance.

Detection and molecular characteristics of bovine rotavirus A in dairy calves in China

  • Liu, Xiaoying;Yan, Nan;Yue, Hua;Wang, Yuanwei;Zhang, Bin;Tang, Cheng
    • Journal of Veterinary Science
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    • v.22 no.5
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    • pp.69.1-69.12
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    • 2021
  • Background: Bovine group A rotavirus (BoRVA) is a major cause of severe gastroenteritis in newborn dairy calves. Only one study has investigated the G and P genotypes among dairy calves in a few regions of China, which were G6 and P[5]. Therefore, data on the prevalence and molecular characteristics of BoRVA in dairy calves in China remains limited. Objectives: The purpose of this study was to investigate the prevalence and molecular characteristics of BoRVA in dairy calves in China. Methods: 269 dairy calves diarrheic samples from 23 farms in six provinces in China were collected to detect BoRVA using reverse transcription polymerase chain reaction. Results: 71% of samples were determined to be BoRVA-positive. Two G genotypes (G6, G10) and two P genotypes (P[1], P[5]) were identified, and G6P[1] BoRVA was the predominant strain. Moreover, the VP7 and VP4 gene sequences of these dairy calf BoRVA strains revealed abundant genetic diversity. Interestingly, eight out of 17 complete G6 VP7 sequences were clustered into G6 lineage VI and analysis showed the strains were closely related to Chinese yak BoRVA strains. Conclusions: The results of this study show that BoRVA circulates widely among dairy calves in China, and the dominant genotype in circulation is G6P[1], first report on molecular characteristics of complete P[5] VP4 genes in chinese dairy calves. These results will help us to further understand the prevalence and genetic evolution of BoRVA among dairy calves in China and, thus, prevent the disease more effectively.

『동의보감(東醫寶鑑)』 <서(序)>와 <집례(集例)>에 대한 고찰

  • Lee, Hyeok-Jae;Cha, Ung-Seok;Kim, Nam-Il
    • The Journal of Korean Medical History
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    • v.17 no.1
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    • pp.177-194
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    • 2004
  • This study examines the main points of DongUiBoGam(東醫寶鑑) based on the preface(序) and Compiled Examples(集禮) of DongUiBoGam(東醫寶鑑). The results of this study are the following: 1) DongUiBoGam(東醫寶鑑)'s InSinReon(人身論: man-body doctrine) states that Form(形 -hyeong) and Jeong(精), Ki(氣), Sin(神) are the foundation and the Organs are the mediators. 2) DongUiBoGam(東醫寶鑑) includes Taoism, Buddhism, and Medical Science. 3) DongUiBoGam(東醫寶鑑)'s NaeGyeongChapter(內景篇), OeHyeongChapter(外形篇), JapByeongChapter(雜病篇)'s name shows that each chapter's key concept is Gyeing, Hyeong(形-Form), and Byeong(病-Sickness). 4) The purpose of DongUiBoGam(東醫寶鑑) is Following the Ideas Handed Down From Forefathers(慕古人之遺意), and in this prospect, the context could be named, 'The Treasure Box and Mirror of Eastern Ideas' (東意寶鑑-DongUiBoGam).

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