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Establishment of normal canine thoracic radiograph database in small breed dogs
Dongwoo Chang*, Jinhwa Chang, Wooshin Choi, Jinyoung Song, Youngjae Lee, Donghoon Lee, Juhyung Kim 충북대학교 동물의학연구소 2012 Journal of Biomedical and Translational Research Vol.13 No.3
Inter-breed and individual variations in thoracic conformation often resulted in incorrect diagnosis during interpretation of canine thoracic radiographs. Therefore, it may be helpful to build a collection of normal thoracic radiographs of different breeds for useful reference. The aim of this study is to establish a normal canine thoracic radiograph database according to breed, age, and body weight. Medical records and thoracic radiographs of Veterinary Medical Center, Chungbuk National University were reviewed retrospectively. Normal thoracic radiographs of 170 dogs out of 640 patients who had thoracic radiographs were obtained. In 170 normal dogs, Maltese, Shih-tzu, Yorkshire Terriers, and Miniature Poodle were the most prevalent breeds, with 90 dogs. In this study, the normal canine thoracic radiograph database was established in the four breeds; it can be used as normal references for interpretation of canine thoracic radiographs.
Loss of Li2O Caused by ZrO2 During the Electrochemical Reduction of ZrO2 in Li2O-LiCl Molten Salt
Wooshin Park,Jin-Mok Hur,Eun-Young Choi,Jong-Kook Kim 한국방사성폐기물학회 2012 방사성폐기물학회지 Vol.10 No.4
Li2O-LiCl 용융염을 이용한 전해환원기술은 사용후핵연료로부터 우라늄 금속을 회수하기 위해 연구되고 있다. 이 전해환원기술에서는 Li2O가 촉매로 이용되기 때문에 그 농도를 유지하는 것은 매우 중요한 운전인자이다. ZrO2는 피복관의 주성분이 Zr이기 때문에 사용후핵연료에 불가피하게 함유되며, 본 연구에서는 Li2O를 촉매로 이용하는 전해환원공정에서 ZrO2의 거동을 살펴보았다. Li2O와 ZrO2의 화학반응과 전해환원공정 중에서의 생성물을 분석한 결과, Li2ZrO3와 Li4ZrO4가 주요하게 관찰되었고, 이는 Li2O의 손실을 가져오는 원인이 된다. 즉, ZrO2는 Li2O를 소모하는 역할을 하며, 반응생성물은 전기화학적으로 안정하기 때문에 Li2O의 손실이 불가피하게 된다.
Use of a single fuel containment material during pyroprocessing tests
Choi, Eun-Young,Won, Chan Yeon,Lee, Sung-Jai,Kang, Dae-Seung,Kim, Sung-Wook,Cha, Ju-Sun,Park, Wooshin,Im, Hun Suk,Hur, Jin-Mok Elsevier 2015 Annals of nuclear energy Vol.76 No.-
<P><B>Abstract</B></P> <P>The use of a single stainless steel (STS) wire mesh basket as the fuel containment material for a series of pyroprocessing steps has been studied. The use of a single basket minimizes fuel loss and was enabled by transporting and using the basket containing the fuel from one test to the next without unloading it. The series of tests consisted of electrolytic reduction, LiCl distillation, electrorefining, LiCl–KCl distillation, and finally a second electrolytic reduction and a subsequent LiCl distillation step. While the electrolytic reduction of UO<SUB>2</SUB> was conducted in a LiCl–Li<SUB>2</SUB>O molten salt electrolyte at 650°C using the STS wire mesh basket as the cathode, the electrorefining was carried out in a LiCl–KCl–UCl<SUB>3</SUB> molten salt electrolyte at 500°C, using the STS wire mesh basket as the anode. During the salt (LiCl and LiCl–KCl) distillation processes, the product of electrolytic reduction/electrorefining in the basket, which included metallic U and residual salts, was distilled at 850°C under vacuum. The electrolytic reduction, electrorefining, and salt distillation processes were successfully demonstrated with the use of a single STS wire mesh basket through the entire cycle. However, an unstable intermetallic U–Fe layer was observed between the reduction product and the STS basket, when a cross section of the basket was studied after the salt distillation steps. The influence of the U–Fe layer on the electrolysis steps needs to be studied further in order to understand and quantify the lifetime of a single STS wire mesh basket during pyroprocessing.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Use of a single fuel containment basket demonstrated for pyroprocessing spent fuel. </LI> <LI> Achieved UO<SUB>2</SUB> to U conversion rates of over 99%. </LI> <LI> Unstable U–Fe layer observed on the fuel containing basket with repeated use. </LI> <LI> Studying the stability of the U–Fe layer key to determining lifetime of the basket. </LI> </UL> </P>
한우신 ( Wooshin Han ),최정욱 ( Jeongwook Choi ) 한국패션비즈니스학회 2018 패션 비즈니스 Vol.22 No.4
Unlike other ready-made suits, which are normalized based on aspects like, designs, materials, sewing methods, has to be worn for three years, designing and pattern development of school uniform depends greatly on satisfaction and appearance. Furthermore, school uniform is of importance as many teenagers spend most of their time at school. In the present work, an attempt has been made to suggest ideal school uniform for female middle school students based on their actual uniform conditions and design preferences, so that the demands of artistic aspect, and the requirements of a suitable uniform for a female teenager can be fulfilled. Initially, a survey about the actual wearing condition was held to figure out the actual uniform conditions and design preferences. Based on the result of the survey, two types of school uniform were made with different patterns. Finally, the most ideal school uniform for female middle school students was suggested based on the experiment involving a few aspects such as suitability and functionality. It is conjectured that school uniform survey and investigation, could provide useful information to the school uniform business market.
Park, Wooshin,Choi, Eun-Young,Kim, Sung-Wook,Jeon, Sang-Chae,Cho, Young-Hwan,Hur, Jin-Mok Elsevier 2016 JOURNAL OF NUCLEAR MATERIALS Vol.477 No.-
<P><B>Abstract</B></P> <P>A series of electrolytic reduction experiments were carried out using a simulated oxide spent fuel to investigate the reduction behavior of elements in a mixed oxide condition and the fates of elements in the reduction process with 1.0 wt% Li<SUB>2</SUB>O-LiCl. It was found out that 155% of the theoretical charge was enough to reduce the simulated. Te and Eu were expected to possibly exist in the precipitate and on the anode surface, whereas Ba and Sr showed apparent dissolution behaviors. Rare earths showed relatively low metal fractions from 28.2 to 34.0% except for Y. And the solubility of rare earths was observed to be low due to the low concentration of Li<SUB>2</SUB>O. The reduction of U was successful as expected showing 99.8% of a metal fraction. Also it was shown that the reduction of ZrO<SUB>2</SUB> would be effective when a relatively small amount was included in a metal oxide mixture.</P>
Establishment of normal canine thoracic radiograph database in small breed dogs
Jinhwa Chang,Wooshin Choi,Jinyoung Song,Youngjae Lee,Donghoon Lee,Juhyung Kim,장동우 충북대학교 동물의학연구소 2012 Journal of Biomedical and Translational Research Vol.13 No.3
Inter-breed and individual variations in thoracic conformation often resulted in incorrect diagnosis during interpreting canine thoracic radiographs. Therefore, it may be helpful to build up a collection of normal thoracic radiographs of different breeds for useful reference. The aim of this study is to establish the normal canine thoracic radiograph database according to breed, age and body weight. Medical records and thoracic radiographs of Veterinary Medical Center, Chungbuk National University were reviewed retrospectively. Normal thoracic radiographs of 170 dogs out of 640 patients that had thoracic radiographs were obtained. In 170 normal dogs, Maltese, Shih-tzu, Yorkshire Terriers, and Miniature Poodle were the most prevalent breeds with the number of 90 dogs. In this study, the normal canine thoracic radiograph database was established in the four breed, and it can be used for normal references when interpreting canine thoracic radiographs.
Youngjae Lee,Wooshin Choi,Donghoon Lee,장진화,Ji-Houn Kang,Ji-hye Choi,Dongwoo Chang 대한수의학회 2016 Journal of Veterinary Science Vol.17 No.2
Caudal pulmonary artery diameter (CPAD) to body surface area (BSA) ratios were measured in ventrodorsal thoracic radiographs to assess the correlation between CPAD to BSA ratios and systolic pulmonary arterial pressure (PAP) in dogs. Thoracic radiographs of 44 dogs with systolic pulmonary arterial hypertension (PAH) and 55 normal dogs were evaluated. Systolic PAP was estimated by Doppler echocardiography. CPADs were measured at their largest point at the level of tracheal bifurcation on ventrodorsal radiographs. Both right and left CPAD to BSA ratios were significantly higher in the PAH group than in the normal group (p < 0.0001). Linear regression analysis showed positive associations between PAP and right and left CPAD to BSA ratio (right, p = 0.0230; left, p = 0.0012). The receiver operating characteristic curve analysis revealed that the CPAD to BSA ratio had moderate diagnostic accuracy for detecting PAH. The operating point, sensitivity, specificity, and area under the curve were 28.35, 81.40%, 81.82%, and 0.870; respectively, for the right side and 26.92, 80.00%, 66.67%, and 0.822, respectively, for the left. The significant correlation of CPAD to BSA ratio with echocardiography-estimated systolic PAP supports its use in identifying PAH on survey thoracic radiographs in dogs.
TiN Anode for Electrolytic Reduction of UO2 in Pyroprocessing
Sung-Wook Kim,Eun-Young Choi,Wooshin Park,Hun Suk Im,Jin-Mok Hur 한국방사성폐기물학회 2015 방사성폐기물학회지 Vol.13 No.3
파이로프로세싱 전해환원 공정에서 현재 사용 중인 Pt 양극을 대체하기 위한 소재 개발은 매우 중요하다. 이 연구에서는 전 기화학 반응시 산소를 발생시키는 전도성 세라믹 양극으로서 TiN의 전기화학적 거동을 알아보았다. UO2의 전해환원이 일어 나는 동안 TiN 양극의 적합성과 안정성에 대한 평가를 진행하였다. LiCl-Li2O 용융염에서 TiN 양극을 이용하여 UO2를 전기 화학적으로 금속 U로 변환시킬 수 있었다. 반응 도중 TiN의 산화 반응은 관찰되지 않았다. 하지만 TiN 내부에서 공공이 생 기는 것을 확인하였으며, 이에 따라 소재 수명에 제한이 있을 것으로 판단된다. Developing novel anode materials to replace the Pt anode currently used in electrolytic reduction is an important issue on pyroprocessing. In this study, the electrochemical behavior of TiN was investigated as the conductive ceramic anode which evolves O2 gas during the reaction. The feasibility and stability of the TiN anode was examined during the electrolytic reduction of UO2. The TiN anode could electrochemically convert UO2 to metallic U in a LiCl–Li2O molten salt electrolyte. No oxidation of TiN was observed during the reaction; however, the formation of voids in the bulk section appeared to limit the lifetime of the TiN anode.