p-Anisaldehyde가 조골세포 분화에 미치는 영향

김경민 ․ 이도원 ․ 김현준 ․ 김아랑 ․ 장원구 대구대학교 산업기술연구소 2018 産業技術硏究 Vol.29 No.2

p-Anisaldehyde is a natural fragrance extracted from Pimpinella anisum L., and used as a preservative. This study examined the effect of p-anisaldehyde on osteoblast differentiation. First, cytotoxicity tests were carried out after examining the concentrations that did not show toxicity to the cells. The expression of osteoblast differentiation marker gene was confirmed by RT-PCR and was not effective in the treatment with p-anisaldehyde alone. However, p-anisaldehyde decreased the expression levels of inhibitor of differentiation-1 (Id1), distalless related homeobox (Dlx5), and runt-related transcription factor 2 (Runx2), which are osteogenic differentiation marker genes, which are increased in osteogenic condition. alkaline phosphatase (ALP) activity was also confirmed by ALP staining that p-anisaldehyde reduced ALP activity. These results show that p-anisaldehyde is effective in reducing osteoblast differentiation.

Tabu 탐색법을 이용한 PI 제어기 설계

원태현,황기현,문경준,이용길 동의공업대학 2000 論文集 Vol.26 No.1

We propose an adaptive Tabu search method changing neighbor solution's range to be searched each iteration according to an objective function and design a PI controller using the proposed Tabu search. We apply it to a time-delay system to evaluate the usefulness of the proposed method. overshoot, rising time, and settling time.

자동차 주행용 광섬유 자이로스코프 개발

이승원,박경섭 울산대학교 1997 공학연구논문집 Vol.28 No.1

적당한 성능의 광섬유 자이로스코프는 자동차 주행용의 회전율 측정 센서로 사용할 수 있다. 본 논문에서 구성한 광섬유 자이로스코프 시스템은 개회로 방식의 신호 처리를 하며, 단일 모드 광섬유와 방향성 결합기를 이용하여 시스템을 광섬유 일체식으로 구성하였다. 광원으로는 비편광 광원인 He-Ne 레이저를 사용하였다. 자동차 주행용으로 사용할 수 있도록 간단한 구성과 저가격이 되도록 하였다. 본 논문에서는 modified J₁…J₄ 방법을 응용한 신호 처리 방식을 사용하였다. 간섭계 출력을 고속 푸리에 변환(fast Fourier transform : FFT)하여 4 개의 연속 고조파를 구한 다음, modified J₁…J₄를 적용하여 변조도(modulation index)를 구한다. 이 방법은 광원의 파장변동이나 편광 상태의 변화 등에 상관없이 계측할 수 있다. 여기서 구한 변조도를 이용하여 Bessel 함수 ??를 계산한 결과와, 두 고조파의 비로 간단하게 회전율을 구할 수 있었다. Fiber-optic gyroscope of modest performance can be used as angular rate sensor for vechile navigation on land. A practical design is used an open-loop configuration with an all-fiber optical system together with single-mode fiber and directional coupler. We use the unpolarized light source, He-Ne laser as light source, and design simple construction for low cost. In this paper, we used the modified J₁…J₄ method which apply the signal processing technique. Measurements were made of the amplitudes of four harmonics in the electrical spectrum of the output of an interferometer using fast Fourier transform(FFT), and modified J₁…J₄ was used to determine the amplitude of the modulation index. This method allowed us independents of the wavelength fluctuation of the wavelength fluctuation of source and state of polarization changes in measurement. We can simply get the rotation rate with two harmonics ratio, Bessel function, ?? and the modulation depth.

건강한 사람에서 발병한 수두와 동반된 수두폐렴 1 예

박원종,유성근,신경철,정진홍,이관호 영남대학교 의과대학 2007 Yeungnam University Journal of Medicine Vol.24 No.2

Varicella is a contagious infection in childhood disease typically affecting children aged 2-8 years and usually follows benign outcome. In the adult, clinical presentation is more severe and more commonly associated with complications. Varicella pneumonia, although rare, is a potentially life-threatening complication that should be suspected in any adult with varicella and respiratory symptoms. We report a case of varicella pneumonia in immunocompetent patient. The characteristics radiographic findings consisted of diffuse scattered coarse nodular infiltrations, less than 1cm sized, with ground glass opacity and consolidation in both lung fields. The patients was started on intravenous acyclovir. The chest radiograph performed 2 weeks later showed complete resolution of the pulmonary lesions.

얼굴 영상 생성을 위한 고유 공간 모델링

김경수,강오형,이양원 群山大學校 情報通信技術硏究所 1997 情報通信技術硏究論文集 Vol.1 No.-

In this paper, we suggests a novel approach which modifies facial images by utilizing eigenvectors without facial image analysis. Eigenvectors are often used in face recognition and expression understanding, since they exhibit good statistical characteristics of a given population. Especially we present how to employ eigenvectors to reconstruct novel facial images. For this purpose, weight vectors in an eigenspace are modeled to from weight vector database and weight vectors in this database are then applied to facial images to generate desired outputs.

만경강 본류의 자연정화능 향상을 위한 식생학적 진단

이경보,김창환,김종구,이덕배,박찬원,나승용 한국환경농학회 2003 한국환경농학회지 Vol.22 No.2

만경강 본류를 대상으로 수질을 개선하기 위한 일환으로 하천식생의 종구성, 하천형태에 따른 군락의 구조, 단면분석을 통한 현존식생의 분포 등을 종합적으로 분석하여 하천 생태계에 대한 종합적 해석과 식생에 의한 자연정화능 활용방안을 평가하고자 2001년 6월부터 2002년 3월까지 수질 및 식생에 관한 자연정화능을 조사, 평가하였다. 만경강 본류 수질중 T-N의 농도는 갈수기인 겨울철이 17.23 mg/L로 가장 높았으며, 여름철이 8.59 mg/L로 낮았고, 상류보다는 하류에서 그 농도가 높았다. 또한 평균 T-P의 농도는 여름철과 가을철에 각각 0.45, 0.47 mg/L로 비슷하였으나 겨울철에 1.79 mg/L로 농도가 높아졌다. BOD의 농도는 상류유역에서 0.95~2.57 mg/L로 Ⅰ~Ⅱ급수 수질을 나타내었으나 하류유역에서는 6.87~9.72 mg/L로 Ⅴ급수에 가까운 수질이었다. 만경강 상류의 식물상은 73과 134속 218종 33변종으로 총 251종류가 조사되었으며, 중류 일대에서 조사된 식물은 33과 69속 82종 16변종으로 총 98종류가 조사되었다. 그리고 만경강 하류 일대에서 관찰된 식물은 27과 58속 71종 14변종으로 총 85종류가 조사되었다. 만경강 유역에서 자연정화능에 의한 수질개선을 도모하기 위해 식물 생활형별로 하천 정화능이 뛰어난 식물을 조사 분석한 결과 침수식물은 붕어마름, 검정말, 부엽식물은 어리연꽃, 왜개연꽃, 추수식물은 갈대, 줄, 부들, 습생식물은 큰황새 냉이, 고마리 등이 질소, 인 흡수능이 우수한 식물이었다. This study was conducted to get some information on plants abilities to enhance water purification and to find out away to conserve the ecosystem in Mankyeong river. Vegetation were surveyed at 4 sites pointing by 1:5,000 topographical map, from June 2001 through March 2002. T-N content in water were high in all sites of Mankyeong river, the average T-N levels were 8.59 and 17.23 ㎎/L summer and winter, respectively. The average T-P level during summer was 0.47 ㎎/L, but that was 1.79 ㎎/L during winter. The BOD level in Mankyeong upstream ranged from 0.95 to 2.57 ㎎/L which would be in Ⅰ or Ⅱ grade according to water quality criteria by Ministry of Environment, but BOD level in Mankyeong downstream ranged from 6.87 to 9.72 ㎎/L. The plant species of river flora were found 251, 98 and 85, upstream, midstream and down stream, respectively. Among the surveyed plants, Ceratophyllum demersum, submerged plant and Nuphar subinteperrimum took up higher contents of phosphate and nitrogen than other plants. The Phragmites communis and Zizania latifolia having much biomass were thought to be suitable plants for enhancement of the natural water purification.

For-To 구문과 Of-To 구문의 의미론적 차이점에 대하여

권경원 한국현대영어영문학회 2002 현대영어영문학 Vol.46 No.2

The purpose of this paper is to find the semantic difference between for-to construction and of-to construction. In this paper the semantic differences of these constructions have been studied based on (1) the historical change of infinitives, (2) the meaning of prepositions such as for and of, (3) the relation between adjectives in the main clause and the subject of infinitive clause, (4) the relation between the adjective and the action of the infinitive clause. We observed that the infinitive with to was originally a noun in the dative governed by the preposition to, hence was in the first stages of its development a prepositional object modifying the verb. Now this to is not felt as a preposition but rather as a part of the infinitive itself. In the fourteenth century there arose a desire to extend the use of the convenient infinitive construction and people began to give the infinitive a subject of its own when there was no noun or pronoun in the principal proposition which could serve as a subject. The subject was put before the to infinitive and for was used as a formal sign of the introduction of this new subject. While the preposition of represents the inherent relation between two objects in X of Y, the preposition for represents the exchange between two objects in X for X. It is found that the adjective in the of-to construction modifies both the subject and the action of the infinitive clause based on the meaning of preposition of. So the of-to construction can be used as an euphemistic expression. What is important here is that the adjective primarily describes the subject of the infinitive clause. The adjective of the for-to construction does not describe the subject of the infinitive clause but primarily modifies the action of the infinitive clause. The properties of adjectives are [+noun], [+verb]. In other words adjectives are between nouns and verbs. Generally the properties of nouns are permanent, the properties of adjectives are stable and the properties of verbs can be changed rapidly. We found that the adjectives with nominal properties are used in for-to construction and the adjectives with verbal properties are used in of-to construction through these properties. In conclusion, the adjective in the matrix clause modifies the proposition of the infinitive clause in for-to construction. Those adjectives do not describe the subject of the infinitive clause but primarily describe the action of the infinitive clause. In contrast with for-to construction, the adjective in of-to construction modifies both the subject and the action of the infinitive clause. However those adjectives primarily describe the subject of the infinitive clause.

위암환자 전산화단층촬영시 경구조영제로서 물의 유용성에 관한 연구 : Usefulness of Water as an Oral Contrast Agent

정경원,김충현,박청희 충남대학교 의과대학 지역사회의학연구소 1991 충남의대잡지 Vol.18 No.1

Computed tomography is valuable for direct visualization of changes of gastric wall and staging of gastric tumor. Gastric distension is essential for the evaluation of gastric wall. Computed tomography of the gastric wall after sequential ingestion of normal saline to 1000cc, followed by rapid intravenous injection of contrast medium, was performed in 36 patients with known gastric tumors. Three patients were excluded due to incomplete gastric distenstion and the lesion was not detected. Thirtythree patient was analysed preoperatively; the changes of wall were analysed in all patients and CT staging is compared with that of 19 cases who underwent surgery. The results were as follows: 1. All cases are adenocarcinomas. 2. Thickening of gastric wall is detected in all cases and the ulceration within the thickened wall is detected only in five cases among the 25 cases of Borrmann type Ⅱ and Ⅲ. 3. Absence or presence of perigastric fat infiltration is correctly diagnosed in 15 cases among the 19 cases who underwent surgery 4. Lymph node metastasis, is correctly diagnosed in nine cases among the 19 cases 5. Pancreatic metastasis is correctly diagnosed in all cases who General acceptance and tolerance of water as a gastric contrast medium was good in all patients, and water made excellent negative contrast with gastric wall, and there was no side effects.

원통 연삭에서 가공 능률 향상을 위한 연삭 저항의 측정에 관한 연구

김원일,이진,이윤경,왕덕현,이상복,이관철,문원길 경남대학교 공업기술연구소 2000 硏究論文集 Vol.18 No.-

본 연구에서는 원통 연삭 가공에서 가공 능률 향상을 위한 연삭 저항을 측정하고자 연삭 가공 중에 발생하는 연삭 저항의 추이를 확인하였고 다음과 같은 결과를 얻었다. 숫돌과 공작물간의 연삭 강성은 공작 속도의 증가에 따라 지지계의 강성이 높은 경우 증가하였고 절삭 깊이와 연삭 숫돌의 속도에는 연삭 강성이 감소하는 경향을 보였다. 또한 총합 강성은 공작 속도, 절삭 깊이 및 연삭 숫돌의 속도 증가에 따라 지지계의 강성이 높을 수록 증가하였다. 연삭기의 강성 변형과 가공 능률에 영향을 주는 값으로 연삭 강성비는 지지계의 강성이 높을 수록 감소하였다. In this study, the measurement of grinding resistance to improve grinding efficiency in cylindrical grinding was studied and the following conclusions could be obtained. Relation grinding wheel and workpiece, grinding stiffness increases according to increase of work speed for high machine stiffness and decreases depth of cut and grinding wheel speed. Also, resultant stiffness increases high machine stiffness according to increase work speed, depth of cut and grinding wheel speed. The values of the effect stiffness deflection in grinding machine, grinding stiffness ratio decrease according to high machine stiffness.

복섬(Takifugu niphobles)자치어의 골격발달

한경호,오성현,서원일 한국어류학회 2003 韓國魚類學會誌 Vol.15 No.3

복섬의 부화 직 후 자어는 평균 전장 2.14 ㎜로 골격의 골화가 전혀 일어나지 않았으며, 부화 후 1일째 평균 전장 2.38 ㎜의 자어는 두개골에 복추골, 섭이와 관련하는 턱부분에 전상악골과 치골이 먼저 골화가 시작되었다. 부화 후 10일째 자어는 평균 전장 4.24㎜로, 두개골에 전이골과 익이골이 골화되었고, 내장골의 새개부에는 하새개골, 간새개골이 골화하여 새개부가 완성되고, 견대부의 후쇄골이 골화하기 시작하였다. 부화 후 28일째 후기자어의 평균 전장은 7.60㎜로 두개골에 상이골과 상후두골이 골화하여 두개골이 완성되었고, 척추골, 미골 및 담기골이 거의 동시에 골화되었다. 부화 후 35일째 치어는 평균 전장이 8.60㎜로 구개부에 후익상골이 골화하여 내장골이 골화가 완료되므로서, 모든 골격의 골화가 완성되었다. Eggs of Takifugu niphobles (Jordan et Snyder) collected on the shores of Dolsan, Yeosu, Korea, in July 1998, were artificially hatched and the larvae reared in the laboratory to investigate osteological development of larvae and juveniles. The newly hatched larvae attained a mean size of 2.38 ㎜ in total length (TL) and had an ossified dentary, premaxillary and clavicle at this stage. At 10 days after hatching, the larvae (mean 4.24 ㎜ in TL) had ossified prootic, pterotic, subopercle, and interopercle, and the postclavicle had begun to ossify. The ossification of the cranium, vertebrae, caudal skeleton and pterygiophore was complete in the larvae (mean 7.60 ㎜ in TL) at 28 days, and ossification of all bones was complete in the juveniles (mean 8.61 ㎜ in TL) at 35 days.