3차원 전산화단층촬영 영상을 이용한 안면 연조직 두께 계측의 임상적 유용성

정호걸,김기덕,한승호,허경석,이제범,박혁,최성호,김종관,박창서 대한구강악안면방사선학회 2006 Imaging Science in Dentistry Vol.36 No.2

Purpose : To evaluate clinical usefulness of facial soft tissue thickness measurement using 3D computed tomographic images. Materials and Methods : One cadaver that had sound facial soft tissues was chosen for the study. The cadaver was scanned with a Helical CT under following scanning protocols about slice thickness and table speed; 3 mm and 3 mm/sec, 5 mm and 5 mm/sec, 7 mm and 7 mm/sec. The acquired data were reconstructed 1.5, 2.5, 3.5 mm reconstruction interval respectively and the images were transferred to a personal computer. Using a program developed to measure facial soft tissue thickness in 3D image, the facial soft tissue thickness was measured. After the ten-time repeation of the measurement for ten times, repeated measure analysis of variance (ANOVA) was adopted to compare and analyze the measurements using the three scanning protocols. Comparison according to the areas was analyzed by Mann-Whitney test. Results : There were no statistically significant intraobserver differences in the measurements of the facial soft tissue thickness using the three scanning protocols (p>0.05). There were no statistically significant differences between measurements in the 3 mm slice thickness and those in the 5 mm, 7 mm slice thickness (p>0.05). There were statistical differences in the 14 of the total 30 measured points in the 5 mm slice thickness and 22 in the 7mm slice thickness. Conclusion : The facial soft tissue thickness measurement using 3D images of 7 mm slice thickness is acceptable clinically, but those of 5 mm slice thickness is recommended for the more accurate measurement.

全北大學校 邊山演習林의 森林資源

朴鍾旻,金榮浩 全北大學校 1996 論文集 Vol.41 No.-

The purpose of this study is to investigate Forest Resources which is basic materials for the rational management of Byunsan Experiment Forests of Chonbuk National University. That forest resources had been surveyed in 1990. The main results of this research are summarized as follows; Byunsan Experiment Forests was established with gratuitous loaning forests (5,948.29ha) of the Ministry of Agriculture and Forestry in 1959. But, its area reduced to 2.006.51ha in 1976. The area of each forest type is consist of forest 406.76ha, hardwood stands 1,295.53ha, mixed stands 276.43ha, and non-forest land 27.79ha. The everage growing stock of stocked land and total forest land in 55.32㎥/ha, 51.60㎥/ha respectively. The everage growing stock of each forest type is coniferous forest 67.16㎥/ha, hardwood stands 51.25㎥/ha, mixed stands 56.40㎥/ha. Total growing stock of whole the Experiment Forests is 103,542.78㎥. The equation of diameter growing rate in the stands of point and oak P_D = 20.671 D^-0.8139 and P_D = 22.889 D^-0.9113. The correlation equation between DBH and Hight of each stands is H_p = 4.019 D^0.3153, H_Q =2.556 D^0.5150 respectively.

포화비선형이 존재하는 시간지연 시스템의 동적 보상 방법

박종구,최종호 성균관대학교 1998 학술회의지원논문목록집 Vol.1998 No.-

본 논문은 포화 비선형이 내재된 시간지연 제어 시스템에서의 리셋 와인드엎에 대처하기 위한 동적 보상방법을 제시하였다. 시간지연요소 만을 포함한 시스템에 대하여 기존의 제어기 설계기법으로 설계된 시스템이 만족할 만한 응답을 보인다고 가정한 상태에서 포화현상으로 인한 성능저하를 완화하는 추가적인 보상기를 설계하였다. 포화요소가 있는 경우와 없는 경우의 제어기의 상태변수 차이를 목적함수로 하여, 이를 최소화하는 동적 보상기를 구했다. 제시된 동적 보상기는 플랜트 및 제어기들의 구성요소로 결정되는 명시적인 형태이다. 제시된 동적 보상기를 포함한 시스템은 전체적 안정도를 보장받는다. 시뮬레이션 예제를 통하여 제시된 보상방법의 효용성을 보였다. A dynamical anti-windup(ARW) method for time-delay control systems with saturating actuators is considered. Under the assumption that a linear controller was designed for the time-delay control system based on the existing design techniques which shows desirable nominal performance, an additional compensator is incorporated to provide a smooth performance degradation due to the control input saturation. By regarding the difference of the controller states in the absence and presence of saturating actuators as an objective function, the dynamical compensator which minimizes the objective function is determined explicitly. The proposed dynamical compensator is the closed form of the plant and controller parameters. The proposed method not only provides smooth performance degradation, but it also guarantees the total stability of the resulting systems. An illustrative example is provided to show the effectiveness of the proposed method.

重金屬이 Chlorella 세포의 生長및 呼吸能에 미치는 影響

朴載錫,金鍾均,李永祿,崔鎬亨 공주대학교 사범대학 과학교육연구소 1980 과학교육연구 Vol.12 No.1

Chlarella ellipsoidea를 Hg, Cu, Pb, Zn과 같은 중금속 처리배지에서 배양하고 배양중 일정량의 세포를 收穫하여 생장률 및 엽록소 함량을 측정하고 여러농도에서 呼吸能을 측정 비교하였다. 1) 중금속 처리구에서의 세포의 生長, 엽록소함량 호흡能은 정상세포에 비해 정도의 차이는 있으나 모두 감소하였다. 2) 생장장해는 엽록소형성能과 비슷한 저하현상을 보였으며 ??서는 Hg가 가장 심한 장해 를 나타내었고 다음으로 Cu Zn Pb의 順이었다. 그러나 ?? Zn처리구에서는 ?? Hg나 Cu및 ?? Pb처리구보다 심하였다. 3) ??에서의 Hg및 Cu처리구에서는 각각 접종후 3시간 및 41시간후에 황백화현상과 더불어 사멸하였다. 4) 呼吸能은 대체로 ??이상의 농도에서 억제되는 경향을 나타내었다. Chlorella ellipsoidea cells were cultured in a Mercury, Lead, Copper or Zinctreated medium. Some portions of the cells were taken out at intervals during the culture, and the growth rate, the chlorophyll content and the respiratory activity of the cells were meaured. 1. Growth rate, chlorophyll content and respiratory activity of the heavy metaltreated cells decreased more or less, compared with these of the normal cells. 2. The growth retardation showed the similar tendency to the lowering of biosynthesis of chlorophyll, which in ?? medium came out to gradually severe in follow order, Lead, Znic, Copper, and Mercury. But the growth of the cells in ?? Zinc-treated medium was retarded more severely than in ?? Mercury or Copper and ?? Lead-treated medium. 3. The cells in the medium containing 1?? Mercury died out with chlorosis 3 hours later after inoculation, and those in ?? Copper-treated medium, 41hours later. 4. Generally the respiratory activity showed a tendency to de controlled in ?? and over.

Some Considerations of The Differences and Similarities between Korean and English

박종호 안양대학교 1997 논문집 Vol.17 No.-

한 나라의 언어는 필연적으로 그 언어 사용자의 사고와 의식을 반영하고 또한 사고와 의식의 결정체인 문화와 습속에 그대로 투영된다. 다시 말해 국어에는 한국인의 사고와 의식이 반영되어 있고, 또한 이들의 결정체인 한국의 문화와 습속에 그대로 투영되어 있는 것이다. 마찬가지로 영어에는 英·美人의 사고와 의식이 반영되어 있고, 또한 이들의 결정체인 영국과 미국의 문화와 습속에 그대로 투영되어 있는 것이다. 이를 전제로 할 때 국어와 영어의 상이성과 유사성은 곧 한국인과 영미인의 사고와 의식의 상이성과 유사성이며, 더 나아가 한국과 영국·미국의 문화와 습속의 상이성과 유사성이라 할 수 있다. 본 논문에서는 이들 두 언어의 어휘, 어순, 속담이 갖는 상이성과 유사성을 비교 분석하여 이것이 두 나라의 문화와 습속의 상이성과 유사성을 반영하고 있음을 살피고, 이는 곧 한국인과 영미인이 언어적 인간(Speaking Being)과 문화적 인간(Cultural Being)으로서의 상이성과 유사성을 보임을 밝히고자 한다. 우선 인종적·지리적 차이가 나는 만큼이나 언어와 문화와 습속에도 차이가 나므로 한국인과 영미인은 다르다는 점을 보인다. 가령 '어떠한 날씨에도 불구하고' 라는 뜻을 나타내는 말로 한국인은 '비가 오나 눈이 오나'라고 말하며 악천후(-, -) 자체를 강조하는 병렬법적 부정 어휘를 쓰는데 반해, 영미인은 'rain or shine'이라고 말하여 '비가 오거나(-) 아니면 날이 개거나(+)'의 이분법적 포괄 어휘를 쓰는 사고방식이 다르다. 또한 방향을 가르키는 어순으로써 우리는 '東西南北(□)' 으로 해를 중심으로 하는 농경민족임을 말해주는 한편, 저들은 'North, South, East and West(□)'로 별(북두칠성)을 중심으로 하는 이동 민족임을 말해주는 점이 다르다. 뿐만 아니라 생활 양식을 나타내는 속담을 볼 때 우리는 '식은 죽 먹기'와 '그림의 떡'으로 표현되듯 주식이 쌀(죽, 떡)임을 알 수 있으나 저들에게는 같은 내용이라도 'a piece of cake'와 'a pie in the sky'에서 보둣 주식이 밀 (빵)임을 알 수 있다. 이와은 반대로, 비록 사용하는 언어와 삶에 스며있는 문화와 습속은 다를지언정 결국 한국인과 영미인은 같다라는 점을 보인다. 바꿔 말해 인간 본유적인 견지에서 유사성을 나타내는 언어표현을 살펴보므로써, 東과 西라는 지리적인 차이도, 국어와 영어라는 언어적인 차이도 뛰어넘는 같은 한 인간 종족(Homo Sapiens)임을 보인다. 예를 들어 '허황된 것'을 비유하는 표현으로서의 어휘 -'白日夢', 'daydream'이 같고, '좋은 것은 나쁜 것에 앞 섬'을 강조하는 권선징악을 장려하는 인간의 공통 심리를 나타내는 어순 -'선과 악', 'good and evil'이 같고, 또한 '긍정적, 희망적으로 합리화하려는 인간성'을 보여주는 속담 -'무소식이 희소식', 'No news is good news' 가 같은 경우이다. 결론적으로 국어와 영어는 서로 사회 문화적·언어 지리적 차이가 나는 만큼이나 언어표현이 다르기도 하고, 또한 인간 본유적·문화 공유적 본질이 같은 만큼이나 언어표현이 같기도 하다. 따라서 한국인과 영미인은 일면 다르면서도 같고, 또한 같으면서도 다름을 보이는 두 언어표현의 상이성과 유사성을 살펴보기로 한다.

고속 채널로써 전력선 특성 분석

박종연,조호찬,이혁순 江原大學校 産業技術硏究所 2001 産業技術硏究 Vol.21 No.A

For the power line communication, we studied its characteristic impedance, noise characteristics, loss characteristics and the coupling circuit between the communication MODEM and power lines. As the results of the experiments, we concluded that the power line impedance in a house varied in the wide range because the electric systems generate the current and voltage hamornic noises.

관광영어통역안내원의 자질향상을 위한 실제적인 안내 기예

박종호 안양대학교 복지행정연구소 2002 福祉行政硏究 Vol.18 No.-

Abstract Tour guide research done by KNTO (2000, 12) shows that the qualities needed for tour guide are very low; personality(50.6%), manners(39.1%), on the job ability(32.7%), language frequency(l3.5%). Because a guide should take a number of roles for the tourists, he should be a teacher, an entertainer, an ambassador, a nurse and sometimes 'the boss'. With this in mind, this study intends to suggest more practical techniques and system required to be a good guide such as reinforcement of training(55.8%), reformed tour guide exam(l4.7%), introduce to the career management system(l4.7%), improved salary and welfare(l3.5%). Needless to say that the tour guide's task is one of coordinating, communicating, supervising, and acting as liaison between participants and suppliers. This study ensures the tour guide must take several measures to establish leadership with the group, as well as credibility with the suppliers. Unless this is accomplished, the guide is unable to function.

전력선/무선 통합 모뎀을 이용한 Door Lock의 원격 제어 시스템

박종연,이후찬,최원호 강원대학교 산업기술연구소 2005 産業技術硏究 Vol.25 No.B

In this paper we proposed the remote control system for the door lock by the unified modem with the wireless and the power line modem. We developed the management system program between the door-lock system and the proposed unified modem. The infrared communication system was used between the Door-Lock system and the power line modem. With the unified developed modem and the Door-Lock system, it is possible to control remotely the developed system in the internet service area.

硫黃이 內分泌系臟器에 미치는 影響에 關한 實驗的 硏究

朴鍾哲,金昌榮,崔春鎬 大韓神經精神醫學會 1970 신경정신의학 Vol.9 No.1

The experiment was performed on mature white male rats, weighing between 180 gm and 240gm. The experimental animals were divided into A,B and C subgroups, which 200mg of sulful per kg emulsified in olive oil was given orally for 4 days, 7 days and 12 days respectively. The control groups was given olive in orally in the same amount and for the same periods. In both control and experimental groups 100μc of ??or 7μc of ??? was injected intraperitoneally on the 4th, 7th and 12 days respectively. The animals were sacrificed 18 hours after the injections. The following results were obtained. 1. In both A and B experimental subgroups, the seminal vesicles, testicles and adrenals, showed remarkable weight increase while the ??? uptakes in the same groups were mildly increased. In C experimental subgroup the weight of the organs was either slightly increased or decreased, while ??? uptakes was remarkably increased. 2. After sulfur adminstration the thyroidal follicles contained thick colloidal substance and their size was mildly enlarged. However, in comparison with the control group, the form of the glandullar cells was of more cuboidal. The adrenal cortex showed hypertrophic changes and the atrophy of the medulla was so severe that it could be hardly recognized. 3. In comparison with the control group, the tunica mucosa of the seminal vesicles had smaller folds and the superficial cuboidal cell layers was atrophic, the cytoplasm was scanty, and the nucleus remained in the center of the cells. 4. The testicles of the experimental subgroups, compared with those of the control groups showed atrophic changes in the spermatogonium and spermatocytic layers.

유연성을 갖는 로보트 매니퓨레이터의 동적방정식 시뮬레이션에 의한 분석

朴鍾國,배준경,최호선 慶熙大學校 1987 論文集 Vol.16 No.-

High performance requirements such as high speed operation, accuracy and versatility have led to the considration of structural flexibility in robot manipulator. The purpose of this paper is to investigate the interrelationships between the robot structural flexibility and a linear controller for the rigid body motion. The controller used here is used to simulate the controllers currently used in industrial robots. The simulation results illustrate the differences between leadscrew driven and unconstrainted axes of the robot: they indicate the trade-off between speed and accuracy.