Development and Performance Test of an Equipment for a Selective Separation of Paraffin From the Paraffin Solidification Product Using the Vacuum Evaporation and Condensational Deposition Recovery Method

Tae-Yang Noh,Beom-Hee Lee,Byeong-Mok Park1,Ah-Ran Cha,Hee-Chul Yang 한국방사성폐기물학회 2023 한국방사성폐기물학회 학술논문요약집 Vol.21 No.2

Nuclear power plants in Korea stores approximately 3,800 drums of paraffin solidification products. Due to the lack of homogeneity, these solidification products are not allowed to be disposed of. There is therefore a need for the separation of paraffin from the solidification products. This work developed an equipment for a selective separation of paraffin from the solidification product using the vacuum evaporation and condensational recovery method in a closed system. The equipment mainly consists of a vacuum evaporator and a condensational deposition recovery chamber. Nonisothermal vacuum TGAs, kinetic analyses and kinetic predictions were conducted to set appropriate operation conditions. Its basic operability under the established conditions was first confirmed using pure paraffin solid. Simulated paraffin solidification product fixing dried boric acid waste including nonradioactive Co and Cs were then fabricated and tested for the capability of selective separation of paraffin from the simulated waste. Paraffin was selectively separated without entertainment of Co and Cs. It was confirmed that the developed equipment could separate and recover paraffin in the form of nonradioactive waste.

Peroxiredoxin V Regulates Aco2, Acadm, and Acox1 Activity in Hypoxic Kidney

Tae‐Hoon Lee,Hee‐Young Yang,Joseph Kwon,Hoon‐In Choi,Lina Ren,Ung Yang,Byung‐Ju Park,Zae Young Ryoo 한국동물생명공학회(구 한국동물번식학회) 2011 발생공학 국제심포지엄 및 학술대회 Vol.2011 No.1

Peroxiredoxin V, an atypical thioredoxin peroxidase, is widely expressed in mammalian tissues. In addition, Prdx V is localized in mitochondria, peroxisome, cytosol, and nucleus. Prdx V has been reported to protect a wide range of cellular environments as antioxidant enzyme, and its dysfunctions may be implicated in several diseases, such as cancer, inflammation, and neurodegenerative disease. Identification and relative quantification of proteins affected by Prdx V may help identify novel signaling mechanisms that are important for oxidative stress response. However, the role of Prdx V in the modulation of hypoxia‐related cellular response is not studied yet. In order to examine the function of endogenous Prdx V in hypoxic condition in vivo, we generated a transgenic mouse model with Prdx V siRNA expression controlled by U6 promoter. Of many tissues, the knockdown of Prdx V expression was displayed in kidney, lung, and liver, but not spleen and skin. We conducted on the basis of nano‐UPLC‐MSE proteomic study to identify the Prdx V‐affected protein networks in hypoxic kidneys. In this study, we identified protein networks associated with oxidative stress, fatty acid metabolism, and mitochondrial dysfunction. Our results indicated that Prdx V affected to regulation of kidney homeostasis under hypoxia stress.

A Study on the Functionality of Halophytes from Coast area of Jeollanam-do

Tae-Man Ha,Yang-Joon An,Mi-Yeong Shin,Sook Park,Hak-Jae Park,Hyo-Jeong Kang,Su-Jeong Choi,Jae-Yeong Yu,Ji-Yun Jeon,Gyu-Yeon Oh 한국식품영양과학회 2021 한국식품영양과학회 학술대회발표집 Vol.2021 No.10

This study was undertaken to improve the perceived value of halophytes and contribute to the activity of the local economy by analyzing the antioxidant activity and mineral content of Suaeda japonica, Tetragonia tetragonoides, and Spergularia marina that grow wild on the mud flats and coastal areas. The total phenolic compound content found in each order is as follows: Suaeda japonica (3.674∼5.989 mg TAE/g dry wt.), Tetragonia tetragonoides (2.515∼4.471 mg TAE/g dry wt.), and Spergularia marina (2.450∼4.067 mg TAE/g dry wt.); DPPH radical scavenging and ABTS cation radical scavenging activities were also recorded in the same order. In the case of minerals, Iron(Fe) was relatively high in Suaeda japonica (960.1∼1,346.7 mg/kg), Manganese(Mn) in Tetragonia tetragonoides (197.1∼574.8 mg/kg), and Zinc(Zn) was relatively high in Spergularia marina (63.19∼216.56 mg/kg). It was confirmed that the mineral content of Suaeda japonica, Tetragonia tetragonoides, and Spergularia marina was significantly higher than that of Chinese cabbage, lettuce, leek, and spinach.

ASEA-SKF 래들용 고알루미나 내화재의 용손성향

박홍채,이윤복,양태영,장윤식,오기동 釜山大學校生産技術硏究所 1997 生産技術硏究所論文集 Vol.53 No.-

ASEA-SKF 래들에 사용된 고알루미나 내화물의 광물 및 화학적 변화를 화학분석, 현미결관찰, X-선회절분석으로 조사하였다. 미사용 벽돌의 주요 광물상은 α-Al₂O₃, mullite, tridymite이었다. 가동면에서 SiO₂결정상이 소실되었으며 mullite와 α-Al₂O₃가 다소 감소하였고 2FeO·SiO₂와 hercynite, FeO, Cr₂O₃상이 생성되었다. 침식율은 강종에 따라 다소간 차이가 있었으며 용강 SF-45와 60분간 반응시켰을때 SK36벽돌의 침식율은 75.9%인 반면에 SK38벽돌의 침식율은 20.47%이었다. 대부분의 용손벽돌에서 가동면으로부터 내부로 감에 따라 열적 및 화학적 스폴링으로 인하여 미세균열이 존재하였다. Mineral and chemical changes of alumina refractories used in ASEA-SKF ladle were examined by chemical analysis, microscopy and X-ray diffraction method. Main minerals in unused high alumina runner bricks were α-Al₂O₃, mullite and tridymite. In working face of high alumina runner bricks, SiO₂phase was not observed, mullite and α-Al₂O₃phases more or less decreased. On the other hand, 2FeO·SiO₂, hercynite, FeO and Cr₂O₃phases were formed. Th corrosion of high alumina runner bricks showed different behavior by using various types of iron melts. Expecially, corrosivites of SK36 bricks and SK38 bricks, which immersed in SF-45 Iron melts for 60min, were 75.9% and 20.47%, respectively. Microcracks in high alumina runner bricks increased from the working face to the inside due to thermal and chemical spalling.

수도권 지역의 의료기기 관련 업체의 실태 조사 연구

양태홍,이우철,김정래,박승환 서울보건대학 1997 서울보건대학 부설 병원경영연구소 논문집 Vol.3 No.1

Recently, the domestic business of medical equipment have many difficult things in the development and sale of new product. To overcome them, it is needed to solidify the co-work system of industry-education marriage. This paper is undertakened to serve an aid in the field of medical equipment. The analysis of data is attempted through the survey by questionaires, and an object of study is the medical business corporation at Seoul area. As a result to review the data it was identifided that this study is able to be applied to the basis material to reconstruct a right role and phase to medical business Also, it`s expected that we're able to use its results as the educational materials to bring up the more qualified students fit to the industrial need.

조기위암의 임상적 연구

박태준,양은수,류종철,박태군,이희승,신원창,이진호,김관엽 인제대학교 1994 仁濟醫學 Vol.15 No.1

1989년 9월부터 1993년 7월까지 인제대학교 의과대학 상계백병원에서 실시한 위내시경 소견이 조기위암이며 내시경 직시하 생검결과 선암으로 판명되어, 근치적 위절제술을 시행받은 23명의 환자에서 임상적 특징을 알아보고, 문헌고찰과 함께 보고하는 바이다. The incidence and mortality rate of stomach cancer ranks well ahead of all malignancies in Korea. The prognosis is excellent in early gastric cancer of which the overall 5 years survival rate of 85∼95% is comparative with that of advanced gastric cancer of 15∼49%. So early detection with very sensitive mordality of gastroscope and surgery is the only premise to decrease the mortality rate of gastric cancer. This report deals with the clinical aspects of 23 cases of early gastric cancer, which were confirmed with histopathologic examination of resected stomach during the 4 years from September 1989 to July 1993 at Sanggye Paik hospital, Seoul, Korea. Out of 23 cases of early gastric cancer, 14 cases were male, 9 cases were female, and the male to female ratio was 1.6 : 1. The most common type of early gastric cancer was talc type(43.5%), IIc and its combined type comprised most of them(87.0%). The most prevalent sloe of lesion was gastric angle(43.5%) and the most common direction was lesser curvature(73.9%) 19 cases of 23(78.3%) were between 1∼3cm in size, and there was no statistical significance between the size of the lesion and lymph node metastasis. Of the 9 cases with mucosal lesion, there were 2 cases with lymph node metastasis(22.2%), but 7cases(50.0% ) of 14 cases with submucosal lesion presented lymph node metastasis. Diagnostic accuracy of endoscopy on detection of early gastric cancer was 17 cases(73.9%) of total 23 cases in our study. As with other report, histopathulogic examination of resected stomach revealed adenocarcinoma, tubular type as the most common type. Frequent complaint of patients with early gastric cancer was epigastric pain(65.2%), and duration of the symptom was less than 12 months in 17 cases(73.1%) of 23 patients with early gastric cancer.

양족 로봇에 대한 신경회로망 역모델 학습 제어

박세준,양태규 목원대학교 자연과학연구소 2001 自然科學 硏究論文集 Vol.10 No.1

본 논문에서는 신경회로망을 이용한 양족 로봇에 대한 역모델 학습 제어에 관한 연구를 하였다. 5관절 양족 로봇 모델을 가지고 운동학과 동력학을 구했고 신경회로망의 학습으로 역모델을 구성하였다. 로봇 관절의 원하는 위치, 속도와 가속도를 신경회로망의 입력으로 하고, 원하는 토크를 출력으로 하여 토크 오차가 영(0)이 되도록 가중치를 학습시켜 조절하여 역모델을 구했다. 역모델에 의한 각 관절의 위치, 속도와 가속도를 제어하는 방법을 제안했다. 역전파 알고리즘을 사용하여 컴퓨터 시뮬레이션을 통해 역모델의 효율성을 입증했다. 반복횟수가 많을수록 SSE(sun square error)가 영에 가까워짐을 알 수 있었다. 또한 원하는 토크, 위치, 속도와 반복횟수에 따른 토크, 위치, 속도 오차의 차이를 표로 보여주었다. 반복횟수가 많을수록 토크, 위치, 속도 오차가 적음을 알 수 있었다. In this paper, learning control of inverse for biped robot using neural network is studied. Kinematics and dynamics of a 5-link biped robot model was attained, and by the neural network's learning capability a reverse model was made. Using the robots joint position, speed, and acceleration for the neural networks input and the desired torque as the output, adjusting neural network's learned weights to make the torque error to be zero and attained an inverse model. We proposed a method for each joint position, velocity and acceleration control by the inverse model, and the inverse model efficiency is proved by simulation using back-propagation algorithm. We now know that the larger the iteration number, the closer the SSE(sun square error) approaches to zero, and that the larger the iteration number, the smaller the error of torque, position, and velocity.

균일한 색 변화를 위한 밝기 사상과 최대 채도 재현을 위한 색역사상

박양우,윤태진,한찬호 경운대학교 산업기술연구소 2001 産業技術硏究論文誌 Vol.3 No.2(C)

In this paper, luminance mapping for uniform color distribution and gamut mapping for maximum chroma reproduction are proposed. In the conventional lightness mapping, the average lightness difference between the two gamut is increased and different color changes in bright and dark regions are also increased. TO solve these problems, a lightness mapping is proposed that minimizes the lightness difference of the cusps at each hue angle and produces same color changes in bright and dark regions. Also, chroma mapping that utilize variable anchor point and an anchor point are proposed for maximum chroma reproduction and uniform color change. The proposed algorithm reduce a sudden color change on the gamut boundary of the printer and to maintain a uniform color change during the mapping process. Accordingly, the proposed algorithm can reproduce high quality images with low-cost color devices.

咸平灣에 對한 生態學的 硏究

朴炅洋,宋泰坤 木浦大學校沿岸生物硏究所 1987 沿岸生物硏究 Vol.4 No.1

1984년 2월부터 1985년 9월 사이에 함평만의 생태학적 기초연구를 위하여 수질, 저질 및 규조류에 대한 조사를 실시하였다. 해수에 있어서 수온의 분포는 최저 -0.2℃에서부터 최고 27.6℃의 큰 변화를 보였으며 염분량은 29.32∼32.51‰, 용존산소량 3.66∼8.08㎎/ℓ, COD 0.56∼2.67㎎/ℓ, 총질소량 0.77∼8,36㎍-at/ℓ, 그리고 인산염 0.28∼0.89㎍-at/ℓ범위였으며, 이들 환경요인의 수직적인 분포양상은 표층과 저층간에 큰 변화가 없는 혼합구조를 보였다. 부유물질량은 4.0∼40.0㎎/ℓ 범위였는데 김의 채취시기에 그 양이 많았다. 저질은 만의 입구부와 간석지의 일부를 제외하고는 silt와 clay로 구성되었으며, 이들의 pH는 6.6∼7.7, 전기전도도는 1.6∼5.0mmhos/㎝ 범위였다. 저질 중에 함유된 유효인량은 1.15∼6.17ppm, 전질소량 0.20∼0.74㎎/g, 페오파이친 색소량 0.1∼5.6㎍/g, COD 6.2∼12.7㎎/g 및 유화물량 0.03∼0.70㎎/g였다. 이들의 수평적인 분포는 서로 유사하엿으며, COD,는 부영양화의 상한치에 많이 미달되는데 비해 유화물량은 상한치를 넘는 곳도 있었다. 조사기간동안 채집된 규조류는 22속 41종 1변종 1품종으로 총 44종류였으며, Coscinodiscus속의 출현율이 높았고, 4월과 7월에는 각각 Paralia sulcata와 Eucampia zoodiacus가 많이 나타났다. 규조류의 현존량은 162×10³∼8,910×10³cell/㎥로 11월에 그 양이 많았고 6월에 적었다. Physicochemical properties of water and bottom mud, and the species composi tion and biomass of diatoms were studied in Hampyung Bay for the period of Feburary, 1984 and September, 1985. The variation of water temperature was great, ranging from - 0.2 to 27.6℃. Water qualities such as salinity, DO, COD, total nitrogen and phosphorous showed no significant difference in relation to water depth. Suspended substance content of water varied from 4.0 to 40.0㎎/ℓ and the highest value showed in late winter and early spring. Soil particels of bottom mud was composed of clay and silt in almost sites except the mouth of Hampyung Bay. Horizontal distribution in quantities of physicochemical factors of bottom mud such as pH, conductivity, available phosphorus, phaeophytin content, COD and sulfide was almost same pattern. The diatoms collected during the investigated period were composed of 41 species, 1 variety, 1 forma in 22 genera. Genus Coscinodiscus was a high frequent group. Paralia sulcata was dominant species in April and Eucampica zoodiacus in July. Cell number of diatoms fluctuated with a range from 162 10³cells/㎥ to 8,910 10³cells/㎥.

임상교정 교육용 멀티미디어 데이터베이스 웹서버 구축에 관한 연구

박재우,이종기,장영일,남동석,김명기,양원식,김태우,백승학 대한치과교정학회 2000 대한치과교정학회지 Vol.30 No.2

본 연구는 인터넷상의 가상공간에 다양한 자료로 구성된 환자 증례를 통해, 교정을 배우고자 하는 임상의나 학생들의 교육에 필요한 멀티미디어 데이터베이스를 구축하기 위한 것이다. 이러한 시스템을 구현하기 위해서는 이미지 자료의 처리, computer network를 통한 빠른 정보처리 기능, 진단 분석법의 개발, 데이터베이스의 구축 기술, 데이터베이스와 인터넷과의 연계, 증례를 통한 교육방법론과 같은 기술적 문제점들이 있다. 진단과 치료계획을 위한 분석은 모델 분석과 두부방사선 사진분석으로 나누어 제공하였다. 모델분석법은 arch length discrepancy와 Bolton tooth ratio를 환자 정보란에 제공하였다. 두부방사선 사진분석은 초진란에 제공하였다. Cephalometric analysis ver 2.0과 Power Ceph pro 3.3.5를 이용하여 Tweed, Steiner, Jarabak분석법 등을 제공하였으나, 본문에서는 주로 Kim's analysis와 몇 가지 계측치를 추가하여 설명하였고, 나머지는 tracing란에서 제시하였다. 또한 치료 종료 후나 보정란에서 치료 전, 후의 두부방사선 사진을 중첩해서 보여줌으로써 치료에 의한 효과를 직접 볼 수 있도록 하였다. The Objective of this research was to construct the multimedia database system that was necessary for the education of the practitioners and the students. To establish this system, there were technical problems as follows : 1) The processing of the images, 2) The rapid processing of the information with the computer network, 3) The development of diagnosis tools, 4) The technique to establish the database system, 5) The link between the database system and the internet, and 6) The method to educate through many cases. The analysis for diagnosis and treatment planning were provided as two parts : model analysis and cephalometric analysis. As a model analysis, arch length discrepancy and Bolton tooth ratio were provided for the part of patient information. Cephalometric analyses were provided in the part of initial diagnosis. The Cephalometric analysis ver 2.0 and the PowerCeph pro 3.3.5 were used to show Tweed, Steiner and Jarabak analysis. In the main part, Kim's analysis and some measurements were added. In the post-treatment or retention part, we show the superimposition of the cephalometrics with which you can find the effectiveness of the various orthodontic treatment. The address of this home page is "http://damis.snu.ac.kr/orthodontics"