Electrical quadruple hysteresis in Pd-doped vanadium pentoxide nanowires due to water adsorption

Kim, Byung Hoon,Oh, Soon-Young,Yu, Han Young,Hong, Won G,Yun, Yong Ju,Kim, Yark Yeon,Kim, Hae Jin Elsevier 2010 SCIENCE AND TECHNOLOGY OF ADVANCED MATERIALS Vol.11 No.6

<P>Humidity-dependent current–voltage (<I>I–V</I>) characteristics of Pd-doped vanadium pentoxide nanowires (Pd-VONs) were investigated. Electrical quadruple hysteresis (QH) was observed and attributed to the large amount of water molecules adsorbed on the nanowires. Using QH in Pd-VONs, the reaction of water with PdO was interpreted as the water molecules are desorbed and then dissociated with increasing bias voltage. Owing to the dissociated H<SUP>+</SUP> and OH<SUP>−</SUP> ions, PdO is reduced and oxidized. As a result, water molecules recombine as the bias voltage is decreased.</P>

A STUDY ON THE EXPLOSION SAFETY ASSESSMENT OF HYDROCARBON REFRIGERANT REFRIGERATOR

Oh,Kyu-Hyung,Kim,Min-Kyu,Chu,Euy-Sung,Lim,Byung-Han,Kim,Man-Hoe,Park,Yoon-Ser 한국화재소방학회 1997 한국화재소방학회 학술대회 논문집 Vol.1997 No.-

This paper discribes an experimental explosion risk assessment study on refrigerators containing flammable hydrocarbon refrigerant. A refrigerator used in this study is a larder fridge type, 215 liter in volume. The hydrocarbon refrigerant used in the refrigerator is iso-butane(C<TEX>$_4$</TEX>H<TEX>$_{10}$</TEX>). For the explosion safety assessment of the refrigerator, temperature of compressor, cooling air circulation fan motor, defrost heater and inner lamp were measured during the operation. And to confirm the ignitablity of flammable gas by the electric spark of the switches of the refrigerator, ON-OFF test of all switches were conducted with compulsorily near the stoichiometric concentration atmosphere of iso-butane-air mixture. As the result of experiment above mentioned and another experiment for the explosion safety assessment, we can conclude that explosion hazard in connection with the use of hydrocarbon refrigerant was few.w.

정신장애인 치료에 중요 역할 담당자의 정신질환에 대한 태도조사

김병후,정선욱,강연화,김윤,김창엽,홍진표,한오수,조맹제,김용익 大韓神經精神醫學會 1996 신경정신의학 Vol.35 No.5

Objectives : Attitudes of families of mentally ill, health personnels and community leaders to the mentally ill after the development and utilization of the community mental health program and reintegration of the chronically ill patients into society. This study was designed to compare the attitudes toward the mentally ill patient of the persons who have important role in treating the mentally ill and to find the variables influencing the attitudes. Methods : We measured attitudes toward mental illness in psychotic patients' families(N=139), community leaders(N=180) and health personnels(N=324) including mental health personnels before the implementation of community mental health services in Yonchon county and Seodaemun district area. The instrument used to measure attitudes was Opinion about Mental Illness(O. M. I.) scale. Results : 1) Health personnel showed lower Authoritarianism(Factor A) and higher Benevolence(Factor B) scores on the average than community leaders and psychotic patients families. 2) Current residence affect the attitudes in psychotic patients' families, not in community leaders and health personnels. Families in urban area showed lower Authoritarianism(Factor A) and Social Restrictiveness(Factor D) and higher Benevolence(Factor B) scores than in the rural areas. 3) Many patient variables were correlated to the attitudes of families. Duration of illness, number of recurrence, number of admission, age of patient and family burden were positively correlated mainly to Social Restrictiveness(Factor D). 4) Sex and religion of respondents showed no or weak relationship with the factor scores. Conclusions : Education for community leaders and families is required to achieve successful community mental health services. Community support program should be developed for chronic, recurrent and burdensome psychiatric patients in the first place.

Oblique Posterior Interbody Fusion with Bone Plugs by Unilateral Approach for Treatment of Lumbar Instability - Technical Note -

Soo Young Oh,Joo Han Kim,Jung Keun Suh 대한신경외과학회 2003 Journal of Korean neurosurgical society Vol.33 No.5

A new technical method using bone plugs with oblique posterior interbody fusion(OPIF) was designed to increase the fusion rate. One hundred-seventy-five patients were operated for lumbar instability between November 1990 and December 2000. The L5/S1 segment was affected in 129 cases(74%) of the patients. Oblique posteior interbody fusion with bone plugs by unilateral approach was performed in all patients. Eight-nine percent of these patients showed good surgical results. This stable transplant interbody fusion has the several advantages. Foreign substance is not used and this method increases fusion rate and cost-effective. OPIF using bone plugs along with Oh's screw could provide sufficient stability for segmental instability of the lumbar spine including spondylolisthesis of the lumbar spine, with or without concurrent herniated intervertebral disc or spondylotic narrowing. Key words:Bone plug;Lumbar spine;Oblique posterior interbody fusion(OPIF);Oh's screw.

圓光醫大 附屬 第2病院 神經精神科 患者에 對한 統計的 考察(Ⅱ)

박민철,장광철,김상원,김한주,유미경,김훈,유용진,김현정,박남진,오상우,이귀행,노승호,백영석 圓光大學校 醫科大學 神經精神科學敎室 1992 圓光精神醫學 Vol.8 No.1

본 연구는 1986년 7월 11일부터 1991년 7월 10일까지 원광의대 부속 제2병원 신경정신과에서 의래 및 입원치료를 받았던 6,072명의 환자를 대상으로 병원 역학조사를 실시하고 그 결과를 1차조사 (박민철 등1986)와 비교했다. 1.전체 환자 중 남자가 54.4%로 여자보다 많았고, 이리와 이리 인접지역이 84.0%로 대부분의 지역을 나타났다. 의료보장상태는 보험환자가 57.1%, 의료보호환자21.8%, 일반환자 21.1%였으며 연령별로는 20대 24.6%, 30대 22.8%로 20대 30대가 절반정도를 차지했다. 2.외래환자에서는 신경중성장애가 46.0%로 가장 많고 정동장애, 경련성장애 순이며, 입원환자에서는 정신분열증이 30.5%로 가장 많고 기질성정신장애, 정동장애의 순이었다. 3.남자는 신경증성쟝애(23.4%), 정신분열증, 기질성정신장애 순이고 여자는 신경증성장애(39.9%), 정동장애, 정신분열증의 순이었다. 남자가 여자보다 많은 진단은 알코올정신장애(94.6%), 기질성정신장애, 소아정신장애 순이고, 여자가 남자보다 많은 진단은 정동장애(64.5%), 신경증성장애였다. 4.진단별 연령분포에서 신경증성장에는 30대(25.3%), 20대, 40대 순이고, 정신분열증은 20대(40.5%), 30대, 40대 순이며, 정동장애는 20대, 30대, 50대 순이나 비교적 비슷한 융이었다. 5.진단별 발병연령에서 신경증성장에는 20대, 30대가 절반이고,정신분열증은 20대(51.3%), 10대, 30대 순이며 정동장애는 20대(30.7%), 30대, 50대 순이었다. 진단별 평균 발병연령은 신경증성장애 32.7세, 정동장애 36.1세, 정신분열증 23.6세였다. 6.진단별 이병기간은 2년이상이 신경증성장에 28.3%, 정신분열증 68.5% 정동장애 43.9%인데 전체적으로 41.0%였다. 진단별 평균 이병기간은 정신분열증 73.2개월, 정동장애 45.5개월, 신경증성장애 29.5개월이었다. We examined epidemiologic study of 6,072 patients who visited Wonkwang Neuropsychiatric hospital since July 11 of 1986 until July 10 of 1991 and compared this results with previous study(Park et al 1986). The study revealed as follows:1. Of total patients males visited this hosptial more than females as 57.1%, Most of them(84.0%) resided Iri and neighbouring Iri. In the point of insurance, insured patients, medicaid patients and uninsured patients were 57.1%, 21.8% and 21.1% respectively. On the distribution of age, the twenties, the thirties were 24.6%, 22.8% respectively and twenties and thirties were about half of total patients. 2. Of outpatients neurotic disorder was the most as 46.0%, secondly mood disorder and thirdly convulsive disorder, but of inpatients schizophrenia was the most as 30.5%, secondly organic mental disorder and thirdly mood disorder. 3. Of males neurotic disorder was the most as 23.4%, secondly schizophrenia, and thirdly organic mental disorder, but of females neurotic disorder was the most as 39.9%, secondly mood disorder and thirdly schizophrenia. alcoholic mental disorder(94.6%), organic mental disorder, child mental disorder were mostly found in males,but mood disorder(64.5%) and neurotic disorder were mostly found in females. 4. On the distribution of age neurotic disorder was found the most in the thirties(25.3%), next in the twenties and in the forties, and schizophrenia was found the most in the twenties(40.5%), next in the thirties and in the forties, but mood disorder was found the most in the twenties, next in the thirties and in the forties but revealed similar rates relatively. 5. On the distribution of age of onset neurotic disorder developed nearly half during the twrnties and the thirties, schizophrenia developed mostly during the twenties (51.3%), secondly the teens and thirdly the thirties, but mood disorder developed firstly the twenties(30.7%), secondly the thirties and thirdly the fifties. on the average age of onset of illness neurotic disorder, mood disorder and schizophrenia were 32.7 years, 36.1 years and 23.6 years respectively. 6. On the duration of illness more than two years was 28.3% in neurotic disorder, 68.5% in schizophrenia and 3.9% in mood disorder and on the average duration of illness schizophrenia, mood disorder and neurotic disorder were 73.2 months, 45.5 months and 29.5 months respectively.

Distribution of Aquaporins (Water Channels) in the Rat Salivary Glands

정지연(Ji-Yeon Jung),한창룡(Chang-Ryoung Han),정연진(Yeon-Jin Jeong),오원만(Won-Mann Oh),김미원(Mi-Won Kim1),김선헌(Sun-Hun Kim),김옥준(Ok-Joon Kim),김현진(Huyn-Jin Kim),고정태(Jeong-Tae Koh),최홍란(Hong-Ran Choi),김원재(Won-Jae Kim) 대한해부학회 2002 Anatomy & Cell Biology Vol.35 No.3

침샘은 하루 1.5 l의 침을 분비하며, 일반적으로 침샘에서 수분이동은 능동적 염분 이동에 따른 삼투현상에 의해 일어난다. 따라서 침샘에서 높은 수분투과성으로 인해 수분통로 단백인 aquaporin (AQP)들이 풍부하게 존재할 수 있다. 지금까지침샘에 4가지 형태의 AQP이 존재한다고 알려져 있지만 침샘에서 정확한 위치와 수분 이동에 대한 각 AQP들의 역할은 아직 확실치 않다. 본 연구는 300 g 정도의 흰쥐를 pentobarbital sodium (50 mg/kg, IP) 마취하에서 carbarchol (10 μg/kg)을 복강 내 투여한 후 AQP들의 역할과 분포를 면역조직화학방법으로 조사하였다. AQP1은 침샘의 미세혈관의 내피세포와 샘세포와 샘관 주위에 존재하는 근육상피세포에 존재하였다. AQP4는 침샘관의 마지막 부위인 배출관에 존재하였다. AQP5는 주로 장액세포의 바닥가쪽과 세포사이 분비소관을 포함한 세포꼭대기쪽막 에 존재하였으며 콜린성 분비 자극으로 세포꼭대기쪽막으로 이동되어 밀집되었다. AQP5는 모든 침샘의 사이관과 줄무늬 관에도 존재하였으며 점액세포는 약하게 존재하였다. AQP8은 AQP5처럼 장액세포의 바닥쪽막과 세포사이 분비소관을 포함한 세포꼭대기쪽막에 존재하였으며 콜린성 침분비 자극으로 세포꼭대기쪽막쪽으로 이동되어 밀집되었다. 이상의 실험결과는 AQP5와 AQP8이 장액세포에서 일차 침 형성시 일어나는 수분이동의 주된 통로임을 시사하였다. The salivary glands produce 1.5 l of fluid per day. As in other organs, the general paradigm in the salivary glands is that water movement occurs secondary to osmotic driving forces created by active salt transport. Therefore, high water permeability in salivary glands is expected to need a variety of aquaporin (AQP), a water channel. Although four AQPs have been known to reside in salivary glands, the precise location and roles of AQPs have been not well examined. This study is aimed to investigate the distribution of AQPs in 3 major salivary glands and their changes after cholinergic stimulation using immunohistochemical study in Sprague Dawley rats weighing 300 g under pentobarbital sodium anesthesia. AQP1 was localized in the endothelial cells of all salivary capillary vessels and the myoepithelial cells. AQP4 was demonstrated in the epithelium of the excretory ductal cells of all salivary glands. AQP5 and 8 were abundantly present in the basolateral membrane and apical membranes of the serous acini including intercellular secretory canaliculi, whereas AQP5 was weakly present in mucous acini. In addition, AQP5 was found in the epithelium of the intercalated and striated ducts. Upon stimulation of carbachol (10 μg/kg, I.P). AQP5 and 8 tended to translocate from basolateral membrane to the apical membrane, appearing as clusters of dots. These results suggest that AQP5 and 8 are the candidate molecules responsible for the water movement in salivary acinar cells.

反芻動物의 Hemoglobin型에 關한 硏究

金宇權,李載洪,金五南,林貞澤,韓邦根 全南大學校 農漁村開發硏究所 1977 農業科學技術硏究 Vol.12 No.-

牛와 緬羊 그리고 山羊의 hemoglobin phenotype 및 遺傅子의 出現頻度를 檢討하고자 牛 460頭(韓牛 430, Holstein 30), 緬羊 214頭(Corriedale 140 Polworth 74), 山羊 150頭(在來山羊 黑色種 60, 在來山羊 白色種 40, Saanen 雜種 50)에 對하여 寒天 gel 電氣泳動法을 實施하여 다음과 같은 結果를 얻었다. 1. 牛의 hemoglobin phenotype는 HbAA, HbAB, HbBB, HbAC 그리고 HbAD의 5型으로 나타났으며 이들의 出現頻度는 HbAA型이 78.70%, HbAB型이 20.00%, HbBB型이 0.43%, HbAC型이 0.43%, 그리고 HbAD型이 0.43%이었다. hemoglobin型, 支配遺傅子은 ??, ??, ?? 그리고 ??의 4種으로 그 出現頻度는 ??가 89.13%이고 ??가 10.43%이며 ??와 ??는 名名 0.22%이었다. 단지 Holstein種은 hemoglobin phenotype가 HbAA型과 HbAB型만이 나타났으며 그 出現頻度는 HbAA型86.67%이고 HbAB型이 13.33%이었다. Holstein種의 hemoglobin 支配遺傅子는 ??와 ??의 2種으로 그 出現頻度는 ??가 93/33%이었고 ??가 6.67%이었다. 2. 緬羊의 hemoglobin phenotype는 HbAA, HbAB 그리고 HbBB의 3型으로 나타났으며 이들의 出現頻度는 HbAA型이 63.08%, HbAB型이 29.91% 그리고 HbBB型이 7.01%이었다. hemoglobin型 支配遺傅子는 ??와 ??의 2種으로 그 出現頻度는 ??가 78.04%이었고 ??가 21.96%이었다. Carriedale種과 Polworth種과는 hemoglobin型에는 差異가 없었으나 型의 出現頻度와 그 支配遺傅子의 出現頻度에는 큰 差가 있었다. 즉 Corriedale種는 hemoglobin phenotype의 出現頻度가 HbAA型이 80.71%이며 ??의 出現頻度는 89.64%나 되었으나 Polworth의 hemoglobin phenotype의 出現頻度는 HbAA型이 29.73%이며 HbAB型이 52.70%로 가장 많았으며 ??의 出現頻度가 43.92%나 되었다. 3. 山羊의 hemoglobin phenotype는 全部 同一型으로 나타났으며 牛나 緬羊의 HbAA型에 類似하였다. The hemoglobin phenotypes and the gene frequencies of 460 cattle(430 Korean native cattle, 30 Holstein), 214 sheep(140 Corriedale, 74 Polworth) and 150 goats(60 black Korean native goats, 40 white Korean native goats, 50 Saanen hybrid) were examined by agar gel electrophoresis. The results obtained were as follows; 1. In cattle hemoglobin phenotypes, HbAA, HbAB, HbBB, HbAC and HbAD were observed and their frequencies of appearence were 78.70, 20.00, 0.43, 0.43, and 0.43 per cent respectively. The distribution of gene frequency were calculated 89.13 in ??, 10.43 in ??, 0.22 in ?? and 0.22 per cent in ??. Among the cattle hemoglobin phenotypes two hemoglobin types, HbAA and HbAB, were observed in Holstein and their frequencies of appearence were 86.67 and 13.33 per cent respectively. The distribution of gene frequency were calculated 93.33 in Hb?? and 6.67 per cent in ??. 2. In sheep hemoglobin phenotypes, HbAA, HbAB and HbBB were observed and their frequencies of appearence were 63.08, 29.91 and 7.01 per cent respectively. The distribution of gene frequency were calculated 78.04 in ?? and 21.96 per cent in ??. The distribution of gene frequency of Hb?? was 89.64 per cent in Corriedale but 56.08 per cent in Polworth. 3. Only one hemoglobin type was found in the goats and the type was similar to the HbAA type which was showed in cattle and sheep.

集中力訓練이 數學敎科 學習力에 미치는 影響

金永國,朴화燁,權五韓,李善娥 서원대학교 교육연구소 1999 敎育發展 Vol.18 No.2

This study was to analyze the effects of the training of mental concentration on the learning of mathematics. The assumption was to support that the higher the level of mental concentration the higher the achievements of mathematics. For the verification of the assumption were the following five questions listed. First, how can the trained variable of mental concentration be transformable into visual abilities for reading? Second, how can the trained variable of mental concentration be transformable into reading speed? Third, how can the trained variable of mental concentration be transformable into reading comprehension? Third, how can the trained variable of mental concentration be transformable into reading comprehension? Fourth, how can the trained variable of mental concentration be transformable into the higher level of mathematics learning? Fifth, how can the trained variable of mental concentration be transformable into the higher level of school achievements? Two matched groups of junior high school students were sampled for the experiment: One was experimental group for learning mental concentration program, and the other was controlled one. It took eighty-eight days to finish experiment. To the above questions were the answeres listed as the follows: For the independent variables manipulated was it showed that the posttest scores of visual performances focussed on reading were significantly higher than the pretest ones, that the posttest scores of reading speed variable were significantly higher than the pretest ones, and that in verifying the performance of experimental group the posttest scores of reading comprehension variable were not significantly higher than the pretest ones in controlled group. For the dependent variables was is showed that there were no significant differences of mathematics performances between the experimental and control group. And that there were no significant differences of academic performances between the experimental and control group. However, the three consecutive test scores of mathematics of experimental group were higher than the controlled one from the first sessions with treatment of mental concetration through the second to the third one without no treatment. It was concluded that there could exist the differences of learning and development rate in students' traits preformed in acedemic achievements when students were taught to learn mental concentration program designed for extra-curriculum.

XML 문서형 전자책을 위한 전용 브라우저의 설계

김시관,강오한 安東大學校 工業技術硏究所 2001 공업기술연구논문집 Vol.8 No.1

전자책 (e-Book)산업은 디지털 컨텐츠 분야에서 가장 주목받는 새로운 산업으로 떠오르고 있다. 그러나, 기존의 전자책은 표준화된 형식에 의해서 작성되지 않을 뿐 아니라 다운로드 방식에 의하여 사용자의 단말기에 컨텐츠를 내려받기 때문에 저작권에 심각한 문제를 야기시키고 있다. 본 연구에서는 전자책의 컨텐츠를 XNL 형식으로 작성하고 그 내용을 다운로드방식이 아닌 스트리밍 방식으로 처리하여 단말기에서 전용 브라우저를 통하여 컨텐츠를 검색함으로써 전자책 컨텐츠의 표준화와 저작권 문제를 다소간 해결하는 방안을 제시한다. XML has become a very important emerging standard because of its flexibility and universality. Many application programs are actively developed to handle information in XML formats. We propose and implement a generic architecture for processing electronic books (e-Book) where book contents are in XML format. Our new e-Book contents are displayed in page-on-demand techniques comparing with file-download scheme of previous technique. This technique is suitable when considering intellectual property issues.

만성 승모판 패쇄부전증 환자에서의 안지오텐신 전환효소 억제제의 장기 투여 효과

김대희,이명묵,이해영,조현재,박승정,서재빈,서정원,양한모,윤창환,조상호,이준희,김용진,김명아,손대원,오병희,박영배 대한순환기학회 2004 Korean Circulation Journal Vol.34 No.2