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Gwak, Gyeong-Hyeon,Kwon, Na Kyung,Lee, Won-Jae,Paek, Seung-Min,Kim, So Youn,Oh, Jae-Min The American Chemical Society 2017 CRYSTAL GROWTH AND DESIGN Vol.17 No.12
<P>Layered double hydroxide (LDH) nanomaterials of uniform size and homogeneous distribution are successfully developed in agarose hydrogel through the electrical double migration method. To grow LDH crystals in agarose matrix, both cationic (Ni<SUP>2+</SUP>, Ga<SUP>3+</SUP>) and anionic precursors (OH<SUP>–</SUP> and CO<SUB>3</SUB><SUP>2–</SUP>) of LDH are simultaneously transported from solution to agarose hydrogel through electric potential, resulting in the in situ crystal growth of LDH. X-ray diffraction patterns, X-ray absorption spectra, and high-resolution transmission electron microscopic images confirm that the developed LDH is ∼15 nm in size and had a well-defined crystal structure. Scanning electron microscopy and small-angle X-ray scattering spectroscopy showed homogeneous arrays of LDH nanocrystals along agarose sheets with homogeneous distribution. On the basis of the characterization results, we suggest that crystal nuclei are first developed on the agarose chain, and then LDHs homogeneously grow along sheets of agarose matrix.</P><P>Layered double hydroxides (LDHs) of uniform size and homogeneous distribution are developed in agarose hydrogel through the electrical double migration method. Developed LDH had a well-defined crystal structure and homogeneous arrays along agarose sheets with homogeneous distribution. Thus, we suggest that crystal nuclei are first developed on the agarose chain, and then LDHs homogeneously grow along sheets of agarose matrix.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/cgdefu/2017/cgdefu.2017.17.issue-12/acs.cgd.7b01252/production/images/medium/cg-2017-01252b_0009.gif'></P>
오연희,이현경,이원재,이성우,박수성,윤혜원,임문환,심재철,김용탁,김성숙,김정란 동국대학교 경주대학 1993 東國論集 Vol.12 No.-
Acute torsion of the ovary and ovarian mass is a recognized surgical emergency, but rarely has the diagnosis been made preoperatively on the basis of imaging studies. The sonographic findings in 14 cases of surgically proven torsion of the ovary and ovarian mass are described. Mostly cystic ovarian mass, engorged vessel, dilated uterine tube, beak-like echo(torsion site), smooth mass wall thickening an free-fluid collection in cul-de-sac are described. More significant in terms of specificity were the demonstration in 6 cases(42.9%) of the smooth mass wall thickening and in 8 cases(57.1%) of a free fluid in the cul-de-sac. We report the sonographic findings of ovary and ovarian mass torsion that may suggest the preoperative diagnosis of this condition.
吳現道,朴才昊,金龍湖 濟州大學校 亞熱帶農業硏究所 1987 亞熱帶農業硏究 Vol.4 No.-
本 試驗은 1985年 3월 부터 1986年 3月에 걸쳐 栽植樣式이 生育과 收量에 미치는 影響을 究明하기 위하여 濟州大學校 亞熱帶農業硏究所 plastic film house에서 遂行되었다. 그 結果를 要約하면 다음과 같다. 바나나의 草長, 葉數, 葉幅, 葉長, 果掌數, 果房重은 栽植樣式에 따라 影響을 받지 않았으나 假莖長, 假莖直徑, 抽穗期, 成熟期는 有意性이 인정되어 正方形, 三角形, 長方形, 栽植樣式 順으로 假莖長과 假莖直徑이 增加하였고 抽穗期와 成熟期도 短縮되었다. 果掌當 果指數와 果掌重은 栽植樣式에 따라 1段에서 差異가 있었고 長方形, 三角形 栽植樣式에서 2段에서는 현저하게 감소하였으나 3段 이후부터는 緩慢하게 감소되는 傾向을 나타내었다. 果掌當 果指長과 果指直徑은 1段에 比해 2段에서 增加하였는데 長方形, 正方形, 栽植樣式에서 1段∼2段 差가 컸으며 果指直徑의 變化는 栽植樣式 및 果掌間에 따라서 差異가 크게 나타났다. 正方形, 三角形 栽植樣式에서 1段에 比해 2段 果指重이 增加하였으나 3段 이후부터는 감소되는 경향을 나타내고 栽植樣式 및 果掌間에 따라 差異가 컸다. This experiment was carried out to elucidate the influence of spatial arrangement at planting on the growth and yield in bananas (Musa cavendish Lambert 'Dwarf Cavendish') from March, 1985 to March, 1986 in the plastic film house at Research Institute for Subtropical Agriculture, Cheju National University, Cheju, Korea. The results obtained are summarized as follows. Plant height, no. of leaves, leaf width, leaf length, no. of hands, and bunch weight, were little affected by planting pattern. However, pseudostem length and diameter were greater and date of emergence and maturity were earlier in the order of regular, triangular, rectangular planting. The number of fingers/hand and hand weight were significantly affected by planting pattern in 1st hands and decreased remarkably in 2nd hand of the rectangular and triangular planting, but tended to be decreased slowly from 3rd hand. Finger length and diameter/hand were greater in 2nd hand than in 1st hand and more significant in the difference of 1-2 hands in rectangular and regular planting than that of triangular planting, finger diameter/hand were afected remarkably by planting pattern or hands. Finger weight/hand were increased in 2nd hand against 1st at regular and triangular planting, but tended to be decreased from 3rd hand and affected by planting pattern or hands.
오연희,이현경,이원재,이성우,박수성 동국대학교 경주대학 1993 東國論集 Vol.12 No.-
A retrospective review of 22 burst fractures of the thoracolumbar spine was performed to define the radiographic features found on CT and plain radiography. Characteristic components of the injury include : 1. Male to female ratio was 2.7 : 1, and the most prevalent age was 21 to 40 years. 2. Multiple level injuries were 6 cases (27.3%), and the most common cause of injury was fall down(14 cases, 63.6%). 3. The most cammon location was L1(45.5%) 4. The most common pattern of the retropulsed fragment in burst fracture was single midline fragment type(14 cases, 63.6%) and the most common type of burst fracture was classical form(10 cases, 45.5%). 5. Posterior element involvement of vertebra was seen in Ⅱ cases(50%) and the most common finding was laminar fracture in 9 cases. 6. The degree of anterior wedging above the 50% in height of vertebral body was in 4 cases (18.2%). 7. Degree of spinal canal narrowing and degree of neurological impairment is not directly correlated.
신주위 공간 및 요근을 침범한 췌장성 가성낭포 1례 : 진단및 경피적 배액술 Diagnosis and Percutaneous Drainage
이현경,오연희,이원재,한동선,오민구,이성우,박수성 동국대학교 경주대학 1993 東國論集 Vol.12 No.-
Pancretic pseudocyst is a well-known complication of pancreatitis and may occur in unusual locations. Involvement of the left perirenal space and psoas muscle is rare. Radiologic findings and management of a surgically proven case of pancreatic pseudocyst extending to left perirenal space and psoas muscle is described.
박재현,김승철,한창훈,박종오,임영도 東亞大學校 附設 情報通信硏究所 1998 情報通信硏究所論文誌 Vol.6 No.1
In a case of driving beginnners, it is very difficult to park a car perfectly because driver's knowledge makes more errors than intelligent mechanism when they are performed repeatedly. However skilled drivers be of experienced knowledge are able to park a car quickly. In this paper, we analyzed driving patterns of skilled drivers, designed the fuzzy controller to park based on it, and perform auto-parking simulation of a car using that controller.
열처리 효과에 따른 PbMoO₄단결정의 전기 전도도와 광 흡수스펙트럼의 변화
이호섭,오인환,이재현,노지현,이동일 國立昌原大學校 基礎科學硏究所 1990 基礎科學硏究所論文集 Vol.2 No.-
PbMoO₄단결정의 전기전도도와 그 열처리 효과를 조사하였다. PbMoO₄단결정의 전기전도도는 저온 영역에서는 산소결함으로 인한 이온 확산이 지배적이었으며, 고온에서는 전자 기여에 의한 효과가 크게 나타났다. 그리고 산소분위기에서 열처리한 시료는 열처리 시간이 증가함에 따라 흡수단 근방의 장파장 영역에서 흡수율이 증가 하였다. The electrical conductivity of PbMoO₄single crystals and it's annealing effect were investigated. From the experiment, we conclude that oxygen vacancies are responsible for electical conductivities in low termperature region. But in high temperature, ac conductivity caused by electronic behavior increases rapidly with temperature increases. The absorption coefficient of PbMoO₄annealed in the oxygen atmosphere increases with time in the long wavelength regions above the absorption edges.
안두수,오현철,김민형,이재춘,이명규 成均館大學校 科學技術硏究所 1995 論文集 Vol.46 No.1
This paper presents the methode of optimal control theory and observer for time invariant system via Single Term Walsh Series. The algorithm of the optimal control theory is simulated by MATLAB.