악성종양환자와 정상인이 발성한 모음의 좁은대역 스펙트럼값의 상관계수와 절대차이합 비교

양병곤,왕수건,조철우,김형순,김은지,권순복 한국음성과학회 2003 음성과학 Vol.10 No.4

The objective of this study was to examine two new parameters by which we could screen people with malignant vocal folds. The new parameters were the difference sums and Pearson correlation coefficients between adjacent pairs of intensity level matrices of narrow-band spectra. Audio files from the Korean Disordered Speech Database were analyzed by Praat, a speech analysis softWare, to obtain matrices of 400 intensity levels at 16 time points of each sustained vowel spectra. We limited our study to 12 normal subjects and 20 patients with malignant vocal folds who recorded at least three Korean vowels at a sound-proofed booth in Busan National University Hospital. Results indicated that the average coefficients of the abnormal subjects were much lower than those of the normal subjects while the average difference sums of the patients were much higher than those of the normal ones. Also, we found that the degree of the malignancy of the vocal folds was related to the coefficients and sums. However, some subjects at the initial stages of cancerous vocal folds yielded almost comparable coefficients and difference sums to those of the normal speakers. Further studies on larger databases will be desirable to set certain criteria or threshold levels for screening people with vocal fold diseases.

대기오염이 기관지 천식의 악화에 미치는 영향

류지원,어수택,김기업,이영목,김양기,홍성아,전창균 순천향의학연구소 2007 Journal of Soonchunhyang Medical Science Vol.13 No.1

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차 영상을 이용한 실시간 무인 영상 감시시스템

양성수,지유강,박수봉 동신대학교 2006 論文集 Vol.16 No.-

무인 영상 감시 시스템은 각종 보안과 범죄예방에 대한 관심이 커지면서 감시 카메라를 이용하여 움직이는 물체를 추적하는 영상처리 시스템에 대한 관심이 크게 증가하고 있다. 본 논문에서는 CCD 카메라로 입력되어진 초기 설정된 배경 영상과 움직이는 영상을 분리하여 움직이는 영상만을 추적하고 기록하는 시스템을 설계하고, 실시간 개체 추적 알고리즘을 통해 CCD 카메라에서의 움직임 추적 방법에 의하여 감시 영역내의 움직임을 자동적으로 추적하고 이러한 움직임을 효과적으로 추출할 수 있는 원리를 제시하고자 한다. 먼저, 시간 주파수 저역 통과 필터(Temporal low-pass filtering)를 사용하여 움직이는 물체로부터 영상의 특징 변화를 획득한고 이를 추적한다. 이렇게 움직임이 발견되는 동안 이 비디오 정보를 저장한다. 이때 배경의 변화 및 밝기의 변화에 조금씩 오류가 발생되는 경우 이외 특이한 상황 변화는 거의 나타나지 않았고 움직임 물체의 밝기가 근처 배경 화소점의 밝기와 상당히 비슷하게 되는 영역에서는 물체의 추출이 순간적으로 어려워짐을 알 수 있었고, 반면에 상대적으로 높은 영상 잡음의 간섭이 있는 환경 아래서도 움직임 추출 및 분리 성능을 보였다. 본 논문에서 제안한 영상 시스템을 기반으로 한 감시 영상의 효율적 기록 및 검색 시스템은 앞으로 보다 대중적으로 쉽게 사용할 수 있을 것이다. There has been much increase of interest in image processing systems detecting moving objects using watching cameras, together with the increase of interest in security and crime prevention. This study was carried out to design a system which separates the background image input by CCD camera and the moving images, and which detects and records only the moving images, and to suggest a principle which can detect automatically and search effectively the moments in the watching area by the moving detection methods from CCD camera through real time object detection algorism. This system acquires and detects the feature changes of image from moving objects using temporal low-pass filtering while recording the video information. Apart from the little error in the changes of background and brightness, particular changes of situation did not occur. Searching objects was temporally difficult in the areas where the brightness of moving objects was similar to that of the nearby background. On the other hand, searching and separating movements was excellent even under the circumstances of relatively high intervention of image noise. It is expected that the image system based effective recording and searching system of watching image will be widely and popularly used in the near future.

Sagittal appliance를 이용한 부정교합의 치료에 관한 증례

양규호,김지영,오희수 大韓小兒齒科學會 1991 大韓小兒齒科學會誌 Vol.18 No.2

Sagittal appliance is an active plate with expansion screws in the anteroposterior direction.It is used to advance the maxillary incisors and to distalize the maxillary molars,thereby to increase arch length. Sagittal appliance produces changes of tooth position in the surrounding bone by converting mechanical pressure into biological energy as the screws are activated regularly. We treated anterior crossbite,severe crowding,and submerged tooth with sagittal appliance. The results were as follows: 1. Dental crowding was relieved by some advancement of incisors and most of distalization of molar after extraction of second molars. 2. Anterior cross bite caused by immaturity of premaxilla was corrected by advancement of maxillary incisors and premaxilla and then facial profile was improved. 3. Irregular tooth arrangement and labial inclination of incisors occured during treatment will be corrected by fixed appliance. 4. Mesially titled first molar caused by submerged second primary molar was uprighted and lost space of secondprimary molar was regained by lower unilateral sagittal appliance.

소뇌 출혈을 동반한 침입성 부비동 아스페르길루스증 1예

양현덕,박성욱,손일홍,이지용,석승한,조광호,이성수 圓光大學校 醫科學硏究所 2003 圓光醫科學 Vol.18 No.2

혐기성 소화에 대한 식종원 및 암모니아 농도의 영향

김양지,김성일,신범식,안기섭,김종수 한국환경농학회 2004 한국환경농학회지 Vol.23 No.1

혐기성 소화에서 미생물에 저해/독성 물질로 알려진 암모니아의 농도와 식종원에 따른 영향 을 회분식 반응기를 이용하여 분석하였다. 식종원은 고농도의 암모니아에 장기간 적응된 축 산농가 축산폐수 집수조의 슬러지 그리고 저농도의 암모니아에 노출된 하수종말처리장 혐기 성 소화조 슬러지를 사용해서 COD 제거율과 biogas 발생량으로 측정된 혐기성 미생물의 활성에 저해영향을 주기 시작하여 3,500 ㎎-N/L에서는 더욱 심하였다. 암모니아 저해 농도 범위에서 휘발성 유기산의 농도는 50㎎/L 범위로 유지되므로 메탄생성균 뿐만 아니라 산생 겅균도 저해영향을 받는 것으로 나타났다. 축산폐수 집수조 슬러지로 식종된 경우 암모니아 농도가 TAN으로 2,500∼3,500 ㎎-N/L 범위에서도 COD 제거율과 biogas 발생량의 감소폭 은 미미하였으나, 하수종말처리장 혐기성 소화조 슬러지로 식종된 경우 암모니아 농도가 증 가할수록 COD 제거율과 biogas 발생량은 큰 폭으로 감소하였다. 결과적으로 암모니아에 장 기간 순응된 슬러지로 식종한 경우 암모니아의 저해 농도에 대하여 적응도 빨랐으며 저해영 양도 적었다. The seeding sources and concentration of ammonia on anaerobic digestion were investigated by batch culture bioreactors. The sourcces of seeding on anaerobic digestion were from swine wastewater collection pit of a hog raising farm and from anaerobic digestion sludge of a municipal sewage treatment plant. The inhibition of ammonia on anaerobic microoganisms was initiated at ammonia concentration of 1,500 ㎎NH₄-N/L and it s effect was increased by increasing ammonia concentration up to 3,500 ㎎NH₄-N/L, regardless the sources of seeding as evidenced by decreases in COD removal efficiencies and biogas yields. The inhibition occurred to not only methanogens but also acidogens since the concentration of volatile fatty acids was maintained at 50 ㎎/L. The COD removal efficiency and biogas yield were maintained constantly while increasing ammonia concentration up to 3,500 ㎎NH₄-N/L when swine wastewater collection pit was used as a seeding; however, those were decreased while increase ammonia concentration when anaerobic digestion sludge was used as a seeding. The results indicate that the seeding acclimated to high concentrations of ammonia for long time was easy in adaptation to high ammonia concentration and less subjective to ammonia inhibitory effects.

MCR에 의한 혐기성 소화에 대한 암모니아의 영향

김양지,김춘미,김성일,김종수 선문대학교 ·중소기업기술지원연구소 2002 선문공대 연구/기술 논문집 Vol.7 No.1

혐기성 소화에서 미생물에 저해/독성 물질로 알려진 암모니아의 농도와 식종원에 따른 영향을 MCR(Master Culture Reactor)을 이용하여 회분식으로 분석하였다. 식종원은 축간농가 축산폐수 집수조의 침전슬러지 그리고 하수종말처리장 혐기성 소화조 잉여슬러지를 사용하였다. 식종원에 상관없이 암모니아는 1,500㎎NH_4-N/L에서 COD 제거율과 가스생성율로 측정된 혐기성 미생물의 활성에 저해영향을 주기 시작하여 2,500㎎NH_4-N/L에서 더욱 심하였다. 암모니아 저해 농도 범위에서 휘발성 유기산의 농도는 50㎎/L 범위로 유지되므로 메탄생성균 뿐만아니라 산생성균도 저해영향을 받는 것으로 나타났다. 축산폐수 집수조 침전슬러지로 식종된 경우 암모니아 2,500㎎NH_4-N/L 농도 범위 이상으로 운전하여도 COD 제거율과 가스생성율은 일정하게 나타났지만 하수종말처리장 혐기성 소화조 잉여슬러지로 식종된 경우 암모니아 농도가 증가할수록 COD 제거율과 가스생성율은 감소하였다. 결과적으로 암모니아에 장기간 순응된 축산폐수 집수조의 침전슬러지로 식종한 경우 암모니아의 저해 농도에 대하여 적응도 빨랐으며 저해영향도 적음을 알 수 있었다. The influence of ammonia and the sources of seeding on anaerobic digestion were investigated by batch operation of MCR(master culture reactor). The sources of seeding on anaerobic digestion were from swine wastewater collection pit and anaerobic digestion sludge of a municipal sewage treatment plant. The inhibition effects of ammonia on anaerobic microorganisms were initiated at ammonia concentration of 1,500 ㎎NH_4-N/L and the effects were increased by increasing ammonia concentration upto 2,500 ㎎NH_4-N/L regardless the sources of seeding as evidenced by decreases in COD removal efficiencies and biogas yields. The inhibition occurred to not only methanogens but also acidogens since the concentration of volatile fatty acids was maintained at 50 ㎎/L during the batch operations of MCR. The COD removal efficiency and biogas yield were maintained constantly while increasing ammonia concentration upto 2,500 ㎎NH_4-N/L when swine wastewater collection pit was used as seeding; however, those were decreased while increasing ammonia concentration when anaerobic digestion sludge was used as seeding. The results indicate that the seeding acclimated to high concentrations of ammonia for long time was easy in adaptation to high ammonia concentration and less subjective to ammonia inhibitory effects.

Benson's Group Additivity Method를 이용한 염화다환방향족 화합물의 열역학적물성치 평가와 생성반응경로에 관한 연구

임지선,박자영,원양수,최성필 嶺南大學校 環境問題硏究所 1995 環境硏究 Vol.15 No.1

도시폐기물 소각시설에서 다이옥신류는 chlorobenzene, chlorophenols, PCBs등의 염소성분이 포함된 방향족화합물과 함께 폐기물의 소각처리시 불완전 연소로 인해 주로 생성된다. 이들 다이옥신 생성에 대한 반응메카니즘의 예측에 필요한 다이옥신을 형성하는 전구물질인 분자 및 radical의 정확한 열역학적 물성치를 평가하기 위해 Benson's group additivity method에서는 고려되지 않는 Cl, F, OH, CH3등과 같은 2개 이상의 치환기가 결합된 방향족화합물에 대한 computer code인 THERM을 이용하여 엔탈피(Hf), 엔트로피(St), 열용량(Cp)을 평가하였다. 또한 이와 같은 열역학적 물성치 평가법의 신뢰성을 검토하기 위해 다양한 방향족화합물에 대한 실험적으로 측정된 문헌치와 평가치와의 절대오차는 para-cresol의 0.02kcal/mole에서 hexamethylbenzene의 3.46kcal/mole로 좁은 범위를 나타내었다. 또한 다이옥신을 생성하는 전구물질들의 열역학적 물성치를 THERM을 이용해 간접적으로 평가함으로써 다이옥신을 형성하는 주요 생성반응 경로에 대해 살펴본 결과는 다이옥신을 형성하는 기초반응(elementary reaction)중 욤소수가 많은 반응물질일수록 반응이 더 잘 일어남을 알수 있었다. Chlorinated dioxins are often observed in effluent from oxidation or incineration such as chlorobenzenes, chlorophenols and PCBs. It would be of significant value to have an accurate and fundamental understanding of the mechanism for dioxin formation, in addition to the knowledge of dioxin thermodynamic properties, in order to assist in the design of stategies to effectively control or reduce emissions of these compounds. Very little has been published on the thermodynamic properties and elementary reactions which lead to formation of dioxins. Benson group additivity method, when used for the estimation of thermodynamic properties of molecules, does not account for all interactions between functional groups or atoms on aromatics, such as chlorines, hydroxyl or ether linkages. Therefore thermodynamic properties of dioxins are estimated by THERM based on Benson's group additivity method corrected by interactions group. Absolute errors between our predictions and literature values range from a low of 0.02 kcal/mole for paracresol to a high 3.46kcal/mole for hexamethylbenzene. We use these thermodynamic calculations to show the feasibility of several elementary reaction pathways leading to dioxin formation, where the presence of chlorine acts to enhance or lower the Gibbs free energy of reactions.

수근관 증후군에서의 무증상성 척골신경병증

문준식,이성수,이지용,한범기,권준범,양현덕,이성익 대한신경과학회 1999 대한신경과학회지 Vol.17 No.2

다수 영구치의 매복 및 맹출 지연의 교정치험례

조사현,양규호,김수지 大韓小兒齒科學會 1997 大韓小兒齒科學會誌 Vol.24 No.3

This report presents a case of adolescent patient who had multiple impacted teeth and no systemic disease, and was treated with removable and fixed orthodontic appliances. The results obtained through these cases were summarized as follows: 1. Even in the case without systemic disease, there can be the delayed eruption of multiple teeth. 2. If the root formation is not completed, root have no excessive curvature, axial inclination of the tooth is not excessive, and there is eruption space, the tooth can be induced to normal occlusion. 3. Since esthetically proper occlusion and dentition was acquired by recovery of the impacted teeth ot normal occlusion, the prosthodontic treatment after extraction of the impacted teeth was less needed. 4. This treatment brought psychological stability to pubertal patient who was interested in his facial profile.