영상 처리 기법을 이용한 OMR 답안지 판독

권갑현,서정상 동양대학교 1999 동양대학교 논문집 Vol.5 No.1

In this paper, a method for scoring OMR exam sheets using image processing techniques is suggested. In many schools, the special-purpose OMR card reader is used to score OMR exam sheets, but it is very expensive and foreign-made as well. Jn this method, a PC and a digital camera are used, so it is relatively low-priced. In addition, the intermediate images produced in this procedure can be stored easily in the computer storage media. Therefore, the necessary store space can be significantly reduced, and the specific card image can be easily retrieved.

흰 쥐에서 Olanzapine의 장간 재순환을 설명하기 위한 약동학적 모델

백현문,채정우,권광일 충남대학교 약학대학 의약품개발연구소 2014 藥學論文集 Vol.29 No.-

Abstract - Olanzapine is an atypical antipsychotic drug that is widely used for the treatment of schizophrenia and acute bipolar disorder. It had been reported that olanzapine was shown enterohepatic recirculation in rat and human. But pharmacokinetic model for enterohepatic recirculation of olanzapine had not been developed yet. In this study, we developed pharmacokinetic model for enterohepatic recirculation of olanzapine. 30mg/kg of olanzapine was administered to rats (n=7) by oral and plasma concentration of olanzapine was determined by HPLC-MS/MS(API2000). Noncompartmental analysis was done by WinNonlin and pharamcokinetic model was developed by NONMEM ver 7.2. Enterohepatic recirculation model was developed with two compartment including gall bladder compartment with mtime option and evaluation was done by visual predictive check(VPC) and bootstrap. As a result of VPC and bootstrap, our model was robust and parameter values were reliable. In conclusion, pharmacokinetic model for enterohepatic recirculation of olanzapine was successfully developed and evaluated. The model was appropriate to predict the plasma concentration of olanzapine in rat and may be useful to develop human model in further study.

무대미술의 관례성 : 맨션(Mansion)에서 '임의의 궁전'에 이르기까지 des mansions au palais a` volonte´

권현정 한국 프랑스어문교육학회 2003 프랑스어문교육 Vol.15 No.-

Comme tout art, le the´a^tre a un mode de fonctionnement spe´cifique et ne peut se contenter de copier la re´alite´, me^me s'il exploite des donne´es (personnages, fiction, espace, temps, langage) qui appartiennent au monde de l'expe´rience. Mais ce monde de l'expe´rience ne peut se transporter tel quel sur la sce`ne; l'espace sce´nique, du fait me^me de ses dimensions, ne peut donner qu'un aperc¸u, qu'un concentre´ des lieux e´voque´s par les fictions. De la` naissent des conventions qui sont des modes de fonctionnement fonde´s sur l'accord du spectateur. La de´coration-type est une des conventions essentielles qui couvre la longue pe´riode qui va du Moyen a^ge au the´a^tre classique du 17e`me sie`cle. Que ce soit sur la sce`ne simultane´e ou sur la sce`ne unique, cette convention repose sur l'espace neutre qui fait nai^tre une autre convention, celle du jeu de l'acteur qui demande a` son tour une grande complicite´/re´ceptivite´ de la part du spectateur. Les acteurs du Moyen Age utilisent l'espace sce´nique place´ devant les mansions de fac¸on tout a` fait arbitraire, comme une sorte de lieu de´veloppe´ en prolongement des diffe´rentes mansions. Ne´anmoins ces conventions-la` sont admises sans difficulte´s par le public. Mais au 17e`me sie`cle, les conventions vont devenir progressivement a` la fois plus pre´cises et plus codifie´es du fait de l'intervention des doctes. Ces conventions provoquent des discussions, du moins des remaniements de la part des cre´ateurs car elles entrent en conflit avec un autre grand principe, celui de la vraisemblance. D'autre part, les conventions sont changeantes et de´termine´es par la mentalite´ des spectateurs. De la sce`ne simultane´e a` la sce`ne unique, des mansions au palais a` volonte´ en passant par la pluralite´ des lieux ou le lieu composite des tragi-come´dies ou des pastorales on n'assiste pas seulement a` l'e´volution de l'esthe´tique de la sce´nographie conventionnelle. Il s'agit aussi d'une forme de mentalite´ : pour les gens du Moyen Age, tout signe exte´rieur vaut une re´alite´ palpable auquel on croit sans mettre en doute sa perception imme´diate. On pourrait parler alors d'une convention spontane´e. Pour les Franc¸ais des anne´es 1630-50, la sce´nographie simultane´e est une manifestation de l'esprit baroque, fait de fantaisie, de liberte´ et d'imagination : le spectateur se prome`ne en imagination en divers lieux situe´s pourtant, de fac¸on totalement invraisemblable, co^te a` co^te sur la sce`ne exigue¨ de l'Ho^tel de Bourgogne. Sans doute a` la sortie de la pe´riode trouble´e de la Fronde, dans les anne´es 1660, il n'est pas e´tonnant qu'on e´volue d'un gou^t anarchique vers l' n'est pas e´tonnant qu'on e´volue d'un gou^t anarchique vers l'unite´ de lieu qui n'est d'autre qu'une maifestation du de´sir de rationaliser, d'organiser aussi bien l'espace fictif du plateau que le monde lui-me^me. Pourtant, ce de´sir de se rationaliser a commence´ a` se faire sentir me^me en ces temps de liberte´. Un signe caracte´ristique de ce changement de mentalite´ est donne´ par l'usage des tapisseries : ces rideaux de tissu descendus des cintres masquent les compartiments dont on ne se sert pas a` tel ou tel moment de l'action sce´nique ; on tend au vraisemblance par l'utilisation de tapisseries qui ont pour but de re´duire l'arbitraire. On imagine par la` le combat, qui va durer plusieurs ge´ne´rations, entre des conventions de moins en moins bien accepte´es et un besoin de vraisemblance qui finira par s'imposer a` la sce´nographie du 19e`me sie`cle sous le nom de re´alisme sce´nique puis de naturalisme. Pourtant, au moment ou` la sce`ne d'illusion se perfectionne jusqu'au de´tail avec le naturalisme, la convention renai^t et se renouvelle : 'la convention consciente' veut de´voiler le fonctionnement propre du the´a^tre ; elle devient le signe de reconnaissance de la the´a^tralite´. Par tous ces e´le´ments de´libe´re´ment propose´s comme arbitraires, la sce´nographie fait comprendre au spectateur qu'il est au the´a^tre, qu'il assiste a` un jeu dont on ne cherche plus a` masquer le me´canisme. Ainsi nai^t une nouvelle vision du monde et du the´a^tre : plus c'est faux, plus c'est vrai ; en multipliant les signes visibles de l'artifice du the´a^tre, on essaye de s'approcher de la ve´rite´ des choses...

국내 혈액질환 환자에서 침습성 아스페르길루스증의 구제치료로서 Voriconazole의 효과와 안전성

권재철,김시현,최수미,최재기,이동건,박선희,최정현,유진홍,신완식 대한감염학회 2010 감염과 화학요법 Vol.42 No.1

Background: Invasive aspergillosis (IA) is associated with significant morbidity and mortality in patients with hematologic malignancies. We investigated the efficacy and safety of voriconazole (VCZ) when used as salvage therapy for IA in Korean adults with hematologic malignancies who had not responded to prior antifungal therapy. Materials and Methods: We retrospectively reviewed data, collected from January 2007 to October 2008, from patients with proven or probable cases of IA. All were probable IA cases, except for one proven case. All cases were refractory or intolerant to antifungal therapy prior to administration of VCZ. Efficacy and safety were assessed in patients treated with VCZ for more than 3 days and for more than one dose, respectively. A favorable response [complete (CR) or partial (PR)] was defined by significant improvement of all clinical symptoms, signs, and radiologic abnormalities. Results: Fifty patients who met the inclusion criteria were enrolled. There were 27 male and 23 female patients with mean age of 44.4 years (range, 15-65 years). Underlying diseases were acute leukemia (35 cases), chronic myelogenous leukemia (4 cases), myelodysplastic syndrome (3 cases), lymphoma (3 cases) and other hematologic diseases (5 cases). Twenty-two patients had received chemotherapy and 13 patients had undergone hematopoietic stem cell transplantation. The lung was the main infection site (94%) followed by the sinus (6%). Amphotericin B deoxycholate alone was the most frequent previous antifungal therapy. The mean duration of antifungal therapy prior to VCZ therapy was 13.9±8.8 days (2-44 days). The median duration of VCZ therapy was 19 days (interquartile range, 49 days). Sixteen patients (32.0%) showed favorable responses (CR:PR=8:8) at the end of VCZ therapy. The numbers of patients with stable disease, progression and death were, 6 (12%), 6 (12%) and 22 (44%) respectively. Most of those with unfavorable responses had relapsed underlying malignancies or refractory graft versus host diseases. Twelve patients developed drug-related adverse events but only one patient stopped VCZ treatment prematurely. Conclusions: VCZ demonstrated an acceptable level of toxicity in patients with hematologic malignancies but further studies are required to prove its efficacy as salvage therapy.

유치 수복물에 따른 주변 법랑질의 탈회 저항성 : QLF를 이용한 연구

권해숙,현홍근,김영재,김정욱,장기택,김종철,한세현,이상훈 大韓小兒齒科學會 2010 大韓小兒齒科學會誌 Vol.37 No.1

본 연구에서는 유치 수복물의 불소 방출 여부에 따른 주변 법랑질의 탈회 저항성과 재광화 효과를 살펴보고자 하였다. 건전 유전치 48개를 16개씩 임의로 세 군으로 나누어, FiltekTM Z250(1군), F2000(2군), KetacTM N100(3군)을 사용하여 제조사의 지시에 따라 충전하였다. 3일 동안 인공 우식 병소를 유발한 후, 14일 동안 인공 타액에 담가 재광화를 유발하였다. Quantitative light-induced fluorescence(QLF)를 이용하여 실험 단계와 시간에 따른 무기질 소실량(ΔQ)의 변화를 관찰한 결과는 다음과 같다. 1. 탈회가 일어난 인공 우식 병소의 ΔQ 값은 3군, 2군, 1군 순으로 작게 나타났고, 이 중 3군은 1군에 비해 유의한 탈회 저항성을 보였다. 2. 1군, 2군, 3군 모두 재광화 1일 후부터 초기 인공 우식 병소의 ΔQ 값과 비교 시 유의한 차를 보였으며, 관찰 기간 동안 지속적인 증가 양상을 나타내었다. 3. 재광화 속도를 의미하는 Δ(ΔQ)/일 값은 각 군에서 처음 1일 동안 유의성 있게 크게 나타났으며, 그 이후 급속히 감소하였다. 4. 수복 재료에 따른 재광화 정도는 각 군 간에 유의한 차이가 없었다. The objective of this in vitro study was to detect and monitor demineralization and remineralization of primary teeth according to restorative materials using quantitative light-induced fluorescence (QLF). A single bur hole was drilled on the each sound forty eight primary anterior teeth, and the specimens were divided into three groups. The cavity was restored with FiltekTM Z250(Group 1), F2000(Group 2), KetacTM N100(Group 3) following the manufacturer's instructions. The teeth were subjected to the demineralizing buffer for 3 days, and then subjected to a remineralizing buffer for 14 days. The change of mineral loss(ΔQ) according to the stages was evaluated by QLF and the following results were obtained: 1. When demineralization was done, ΔQ was increased as follows. : Group 1 (-110.79 ± 27.77) < Group 2 (-104.84 ± 28.95) < Group 3 (-90.16 ± 21.87) : Resistance to demineralization was statistically significant in Group 3. 2. There was a statistically significant increase in ΔQ of all groups since 1st day of remineralization 3. The rate of remineralization, Δ(ΔQ)/day, showed significant high value in each group on the 1st day then decreased rapidly. 4. There was no statistically significant difference in the degree of remineralization among restorative materials.

전치태반의 임상적 고찰

정갑인,이해혁,이효환,유정완,남계현,이임순,이권해 순천향의학연구소 1998 Journal of Soonchunhyang Medical Science Vol.4 No.2

Objective : Our purpose was to make preparations of what for proper emergency care and delivery in order to improve maternal and fetal well-being. Methods : The study was undertaken for the clinical evaluation and statistical analysis on the patients with placenta previa who had been admitted and delivered at Soonchunhyang University Hospital from January, 1994 to May, 1998, retrospectively. Results : The incidence of placenta previa was 2.0%. Placenta previa has occurred more often in multigravida(92%) than primigravida(8%). Vaginal bleeding was most frequent(37.3%) presentation. The mean gestational age at the first bleeding episode was 31~35 weeks(46.4%). The type of placenta previa was totalis (31.3%), Partialis(18%), marginalis(32.7%), low lying(18%). Conclusion . This study indicates that the obstetrician and the pediatrician should be prepared for emergency care and delivery of the placenta previa patients, with the improvement of delivery room and neonatal intensive care unit.

몇 가지 항진균제가 Aspergillus fumigatus에 의한 대식세포의 Cytokine 생산에 미치는 영향

권은영,박철민,박선희,최수미,이동건,유진홍,신완식,최정현 대한감염학회 2007 감염과 화학요법 Vol.39 No.1

배경 : 현재 임상에서 사용되는 서로 다른 계열의 항진균제가 면역세포인 폐 대식세포(alveolar macrophage)에서의 cytokine 생산과 nuclear factor- κB (NF- κB)활성에 미치는 영향을 시험관내에서 파악하고 그 의미를 추론해 보고자 하였다. 재료 및 방법 : AmB, MF, ITZ 등 세 가지 항진균제가 쥐의 폐 대식세포인 RAW264.7 세포의 생존에 미치는 영향과, 이들 항진균제의 전처치가 Aspergillus fumigatus conidia 자극에 의한 RAW264.7 세포에서의 TNF-α, IL-10 생산, NF-κB 활성에 미치는 영향, 그리고 GMCSF와의 상승 작용 등을 WST-1, ELISA, western blot assay를 이용해 통해 측정하였다. 결과 : AmB, MF, ITZ 모두 농도 의존적으로 RAW264.7 세포의 생존을 감소시켰다. A. fumigatus conidia 자극으로 RAW264.7 세포에서 TNF-α 생산이 증가하였으며, 세포 생존에 영향을 미치지 않는 농도의 AmB를 전처치하고 conidia로 자극한 경우 TNP-α 생산에는 차이를 보이지 않았으나, MF와 ITZ을 전처치한 경우에는 TNF-α 생산이 감소하였다. GM-CSF는 AmB 전처치 및 A. fumigatus conidia 자극에 의한 TNF-α 생산에 상승 효과를 보였으나, MF, ITZ은 GM-CSF에 의한 상승 효과를 보이지 않았다. IL-10은 AmB에 의해 생산량이 증가하였으며 GM-CSF와 동시 투여시 IL-10 생산이 유의하게 상승하였다. MF와 ITZ 역시 RAW264.7 세포에서 IL-10 생산을 유도하였으나 AmB에 비해 상승폭이 적었으며 GM-CSF와의 상승 효과는 관찰되지 않았다. A. fumigatus conidia는 NF- κB를 활성화하였으며 항진균제와 GM-CSF 등 약제 처치에 따른 NF-κB의 활성 정도는 분비된TNF-α와 IL-10의 생산 정도와 상관관계를 보였다. 결론 : AmB, MF, ITZ 등 본 연구에 사용된 항진균제는 시험관내에서 A. fumigatus conida로 자극하는 RAW264.7 세포에 전처치함으로써 염증성 cytokine인 TNF-α의 생산을 감소시키고 항염증성 cytokine인 IL-10의 생산을 증가시키는 면역 조절 효과를 나타낼 수 있음이 관찰되었다. 추후 약제간의 면역조절 기능 차이가 항진균효과에 미치는 영향 및 약제에 따른 면역 조절 경로 등에 대한 연구가 필요할 것으로 사료된다. Background : We wanted to evaluate the immunomodulatory effect of three antifungal agents, amphotericin B (AmB), micafungin (MF), itraconazole (ITZ), in the aspect of cytokine production and expression of nuclear factor-κB (NF-κB) in the Aspergillus fumigatus conidia treated-RAW264.7 cells, a murine alveolar macrophage cell line. Materials and Methods : We evaluated cytotoxic effect of antifungal agents using commercial cell proliferation assay. Tumor necrosis factor (TNF)-α and interleukin (IL)-10 production according to stimulation (control, A. fumigatus conidia only, conidia + antifungal drug, conidia + antifungal drug + GM-CSF) was evaluated and compared each using commercial ELISA method. NF-κB activation was evaluated by western blot analysis. Results : AmB, MF, ITZ showed dose-dependent cytotoxic effect on the tested cells. Stimulation of cells by A. fumigatus conidia induced TNF-α production. Pretreatment of AmB at concentration not affecting cellular survival did not change the production of TNF-α compared to conidia treated cells, but pretreament of MF or ITZ showed reduced amount of TNF-α production compared to conidia treated cells. AmB also showed synergistic effect on TNF-α production when simultaneously treated with GM-CSF. IL-10 production was markedly increased when the cells were treated with AmB with conidia. MF and ITZ induced less increase of IL-10 production than AmB. AmB also showed synergistic effect on the production of IL-10 when treated with GM-CSF simultaneously. A. fumigatus conidia enhanced expression of NF-κB. The degree of NF-κB expression was associated with the amount of TNF-α and IL-10 produced. Conclusion : The antifungal agents we used in this experiment showed that decreased TNF-α production and increased IL-10 production from the RAW264.7 cells stimulated by A. fumigatus conidia after pretreatment of antifungal agents. But more studies, such as the association between immunomodulatory effect, antifungal activity and difference of signal pathway of cellular activation according to drugs should be performed.

Streptococcus mutans 로 부터 분리된 mutan의 화학적 특성

권현정,한만덕 순천향대학교 기초과학연구소 2011 순천향자연과학연구 논문집 Vol.17 No.1

Streptococcus mutans produces water-soluble and water-insoluble α-glucan from sucrose by multiple glucosyltransferase (GTFs). Mutan, primarily water-insoluble α-glucan plays an important role in the development of dental plaque. The study was conducted to investigate the chemical properties of mutan purified from crude extracellular polysaccharide of S. mutans. In batch culture of S. mutans, the percent yield(%) of crude extracellular polysaccharide was calculated as 0.026%. Total carbohydrate and protein contents of crude polysaccharide showed 67.3 and 24.3%, respectively. The contents of hexosamine from extracellular polysaccharide extract were found to be 2.4%. Sugar composition analysis showed that mutan obtained from purification of crude polysaccharide is mainly composed of glucose with a slight amount of galactose. In an infrared absorption spectrum of the mutan, the absorption peak in the range of 700 ∼ 900 cm^(-1) indicated that the mutan contained α-1,3-glucan. The ^(13)C NMR spectrum analysis shows that mutan has a high similarity with the α-1,3 linked glucan.

OMR 답안지 판독을 위한 영상의 전처리 방법

권갑현,서정상 동양대학교 2000 동양대학교 논문집 Vol.6 No.1

Recently, in every class of schools and evaluation institutes they are checking the OMR exam sheets through a card reader for exclusive use. Not only because it is very expensive but also because there is few domestic made card reader, it's true that we usually depend on imported products. On the other hand, as the image processing techniques have been improved largely, a digital camera which is image-inputting device is spreading widely. This study suggests a preprocessing method that can put OMR exam sheet in by using a digital camera and read it by using a PC. After we emphasize the contrast of the image that was put into a PC, make it binary, and clear the isolated noises in the binarized image, and then we can make marts on the card be interpreted exactly.

하악전돌증환자의 악교정수술후 하악각변화에 관한 임상적 분석

권영호,장현중,이상한 대한악안면성형재건외과학회 2000 Maxillofacial Plastic Reconstructive Surgery Vol.22 No.2

Predictional study for lateral change between pre- and post-orthognathic surgery has been emphasized mainly on anterior area of lateral profile ; upper lip, lower lip and chin et al. So interest for lateral profile change has been less in posterior area of lateral profile and literature analyzing gonial angle change is rare. The purpose of this study is to make prediction for gonial angle change possible and to offer somewhat treatment guidance for gonial angle to be improved by investigating overall gonial angle change between pre- and post-orthognathic surgery and inquiring into factors influencing on pattern of genial angle change. For this study 35 patients were selected retrospectively. Lateral cephalometric radiographs were taken in just pre-op time, pod 1 day, pod 1 year. They were analyzed and genial angles were measured. The results were as follows : 1.Gonial angle at pod 1 day was decreased about 9.3˚than pre-op and gonial angle at pod 1 year was increased about 4.0˚than pod 1 day. So genial angle at pod 1 year was decreased about 5.3˚than pre-op genial angle(p<0.01). 2.Mean pre-op gonial angle was 129.4˚, showing significantly high value than normal and mean gonial angle at pod 1 year was 124.1˚, showing value near to normal. 3.Mean gonial angle change between pre-op and pod 1 year was decreased about 5.4˚ in female and 5.3˚ in male. There was no statistically significant difference between male and female(p>0.05). 4.Principal factor influencing on decreased gonial angle in gonial angle change between pre-op and pod 1 year was amount of mandibular setback. 5.Principal factor influencing on increased gonial angle in gonial angle change between pod 1 day and pod 1 year was % horizontal relapse, and it was thought that resorption and bone remodelling on posterior area in mandibular distal segment also were related to increased gonial angle. 6.It is thought that sagittal split ramus osteotomy in mandibular prognathic patients with high value of gonial angle is effective to improvement of gonial angle, and In patients who have normal range of gonial angle and are required with excessive mandibular setback, short lingual cut method, additional resection of posterior margin of distal segment, Obwegeser II method will be considerd. 7.More prudent operation and careful post-op management will be responsible for maintenance of post-operactive stable gonial angle.