人齒胚의 發育期象牙質에있어 纖維成分과 粘液多糖類에 關한 組織化學的 硏究

朴斗桓 최신의학사 1974 最新醫學 Vol.17 No.7

It has been suggested that the fibrous elements and several organic components have important roles in the formation and the mineralization of dentin matrix. This investigation dealed with the localization and interrelationship of Korff's fiber and acid mucopolysaccharides with mineralization in the developing dentin histochemically. The lower anterior regions were removed from 14 fetuses, ranging from 3 monthes to 6 monthes of age. They were fixed in 10% formalin, alcoholic formalin, Carnoy's solution and etc., They were not decalcified and embedded in paraffin with vacuum pump. The histological and histochemical staining methods used were silver impregnation method(Gomori), aniline blue stain(Mallory), peracetic acid-aldehyde fuchsin-Halmi method, periodic acid-paradiamine method (Spicer), colloidal iron-hematoxylin stain(Mowry), mixed diamine stain(Spicer), differentiation of cellular RNA and DNA stain(Swift), Van Gieson stain and hematoxylin-eosin stain. The resutls were as follows: 1) Stain ability of argyrophilic Korff's fibers were gradually reduced by mineralization of dentin matrix. 2) Peritubular matrix gave intense activity of acid mucosubstance and chiefly sulphated acid,mu?copolysaccharide were pronounced.

퍼지추론기법을 이용한 2-자유도 비선형 모형 헬리콥터의 자세 제어

朴斗煥,李俊柝,河泓坤 東義大學校産業技術開發硏究所 1998 産業技術硏究誌 Vol.12 No.-

The helicopter system is non-linear and complex. Futhermore, because of absence of an accurate mathematical model, it is difficult accurately to control its attitude. Therefore, we propose a fuzzy control technique to control efficiently its elevation angle and azimuth one. This controller is on the basis of expert's knowledges and his experiences. The simulation results using MATLAB are introduced.

데이터마이닝에서 탐사범위제한 수량연관규칙

박원환,박두순 순천향대학교 부설 산업기술연구소 2003 순천향 산업기술연구소논문집 Vol.9 No.1

Mining association rules in large databases is an important problem in data mining research. We introduce the problem of mining association rules in large relational tables containing quantitative attributes. In this paper, we propose a large interval itemset generation method, which reflects locality when the attribute-value pairs are divided into sub-intervals. To study this issue, we introduce partial interval. In the performance measurements conducted on the real-life dataset, such as the population census data, the proposed method out-performance the conventional ones.

분산 Model의 해석적 비교에 관한 연구

朴慶愛,鄭一鉉,姜斗煥 단국대학교 대학원 1984 學術論叢 Vol.8 No.-

Estimates of dispersion coefficients in flowing fluids may be made from measurements of the step response of this system and comparisons of the experimental output concentration with the concentration calculated from theoretical consideration. Comparisons of theoretical and experimental concentration in the time domain and in the Laplace transform domain are considered. When the outlet signal was calculated by the method of moments, an accurate value of the dispersion coefficient could not be found when dispersion was small because of the effect of errors in the tails of the response. It is found that good estimates of dispersion coefficients can be made from comparisons in the Laplace transform the appropriate ranges of transform parameters are chosen for the comparisons. The optimum weighting factors are defined as those which give the most reliable parameter estimated from the experimental data. The application of the weighted moments method of parameter estimation to typical models in R.T.D. work has been considered, and it has been found superior the to variance method. The relation of this method to other methods has been demonstrated, and a physical interpretation of the method, which provides insight into the optimum choice of the weighting factor, is given. This work took advantage of the step response method that was not affected by the fluid flow in the tracer injection method. So, we were looking for the character of the axial dispersion and the accurate axial dispersion coefficient D_L in fixed bed. The result showed that axial dispersion coefficient D_L was related liearly to superficial velocity and particle diameter, respectively. The equation for the axial dispersion coefficient in the liquid fixed bed is expressed as D_L=0.698U_5^0.532dp^0.643.

파라메터 추정과 슬라이딩 모드를 이용한 상태관측기 구성에 관한 연구

박승규,박두환,김민찬 國立 昌原大學校 產業技術硏究院 2004 産技硏論文集 Vol.18 No.-

The observer which is based on sliding mode is robust to uncertainties. It has the error dynamic independent on disturbances or noises. But its dynamics are very coservative because of its dependence of output error. So, in this paper, an observer with a novel sliding mode is proposed. The sliding mode of this observer is designed by defining a extended error state whose dynamic is determined from the output error. In addition to this advantage, the RLS algorithm is made more useful by proposing the data obtaining method from the existing experimental data. The performace of the sliding mode observer can be improved using the parameters from the RLS algorithm.

윤곽선 추출 및 부영상 분할을 이용한 프랙탈 영상 압축에 관한 연구

박철우,최환언,조철효,김순백,김두영 東亞大學校 附設 情報通信硏究所 1995 情報通信硏究所論文誌 Vol.3 No.1

This paper suggests the method to shorten the search area by using edge detection and subimage partition. For the purpose reduce encoding time, The Domain areas are reduced 1/64 by partitioning original image to subimage, and classified them into edge area and shade area to that detect only the area in the same class. for achieving an encoding with good fidelity, tried to differ the search method as the threshold value of edge which is included in subimage, and compared the compression rate and fidelity when set the size of range block as 4×4 and 8×8.

改正信用狀統一規則의 運用上의 問題點에 관한 硏究 : 運送書類關聯規定을 中心으로

朴斗學,梁暎煥,吳元奭,金正秀 東亞大學校 大學院 1987 大學院論文集 Vol.12 No.-

The U.C.P(1983 Revison) set out guidelines relating to a transport document which would enable banks to accept such a document, or compel them to reject it, regardless of what the document appers to call itself, as follows: a) The case where the credit stipulates a marine bill of lading as the required transport document(Article 26) or, b) The case where the credit stipulates dispatch of goods by post(Article 30), of which case was excluded in this thesis or, c) All other cases where the credit calls for a transport document(Article 25). The definitions of the "shipment" are of "loading on board" or "dispatch" or "taking in charge", so Article 25 which made a clear distinction betwen a marine bill of lading and other transport document, especially combined transport document, referred mainly to the combined transport document as a popular transport document into four paragraphs: Paragraph(a): "mandatory general requirement" which the transport doucument must need for tis to be acceptable under the credit: Paragraph(b): "optional extras", i.e. additional elements in the transport document which will not affect its acceptability; Paragraph(c): elements in the transport document which make its rejection mandatory such as charter-party B/L, or the document issued by sailing vessel; Paragraph(d): elements in a transport document which may cause it to be rejected, such as freight forwarder's transport document. or which may permit its acceptance, such as FIATA FBL, including the freight forwarder's transport document acting as a carrier or agent of a named carrier. In making application of this paragraph(d) in practical side, what is mattered is that the U C P (1983 revision) did not provide the definition of a "carrier" which may be a norm in deciding of acceptability of the freight forwarder's transport document. The 1980 Revision of Incoterms, appreciating that one of the basic functions of a transport document is to evidence the contract of carriage, states that "carrier" means any person by whom or in whose name a contract of carriage by road, rail, sea or a combination of modes has been made, but this definition does not have a binding force and effect on the L/C tranaction because the L/C is a separate transaction because the L/C is a separate transaction from the sales contract. Article 26 applies only when the credit calling for a transport document stipulates as such document "a marine bill of lading", and it broadly follows the structure of Article 25. A marine bill of lading in the Article, unkess otherwise stupylated in the credit must be an "on board" form. As this Article only apply to " a marine bill of lading", the document which contains the word "intended" or "issued by freight forwarder", unless it indicates that the freight forwarder is acting as a carrier or its agent, will not be acceptable. But the Paragraph(b) in this Article stipulates that banks will not reject a document which bears a title such as "Combined transport billof Lading", Combined transport doucument", "Combined transport bill of lading or port-to-port bill of lading ......, so in cases of Combined transport documents which meet the requirements of Paragraph(a) of article 26, it is very confusing to find a appropriate Article in application. thus to avoid a confusion L/C applicant showed designate Article 26 in L/C if he wants it to be applied in Combined transport document. Article 27 made the change of UCp(1974 revision) that an "on board" document should be the norm; namely "taken in charge" or "received for shipment" now because an equivalent alternative for transport documents other than marine bill of lading.

공여신 직출후의 잔류신기능에 대한 고찰

杜歡祐,閔準基,金榮坤,朴泳炅 全北大學校 1996 論文集 Vol.41 No.-

One hundred patients who underwent uninephrectomy for kidney donation between 1989 and 1996 have been checked the changes of renal function before and after donor nephrectomy Follow up periods after uninephrectomy were postoperative 7days, 1year and 4years. Mean blood pressure (systolic/diastolic) before nephrectomy was 115.8±9.2/ 74.3±7.2 mmHg and that of the last reading was 114.9±12.7/ 75.0±9.8 mmHg. The current creatinine clearance of the donors was 78±4 ml/min. The 7days, 1year and 4years after nephrectomy percentage of predonation creatinine clearance were 73±3%, 77±2% and 79±3%, respectively. The 24-hr urine protein excretion in kidney donors was significantly higher after nephrectomy than before nephrectomy (52.1±11.2 mg/day VS. 178±25.6 mg/day). In conclusion, this long-term study of kidney donors shows no adverse effect on blood pressure and renal function after many years of compensatory hyperfiltration.

액체크로마토그래피/질량분석법을 이용한 랫트 혈장내의 Surfactin C의 정량법에 관한 연구

임종환,김명석,이동연,이상훈,백경진,김태원,정두순,박병권,윤효인 충남대학교 수의과대학 동물의과학연구소 2004 動物醫科學硏究誌 Vol.12 No.-

Surfactin isolated from Bacillus subtilis has a strong surface tension-lowering activity, together with antiviral, antitumor, fibrinolytic and hypocholesterolemic activities. LC/MS is a simple, rapid and effective technique for the determination of surfactin C in rat serum. The separation of surfactin was achieved on reverse phase column. The mobile phase consisted of 0.1% trifluoracetic acid in water (A) and acetonitrile (B). As a result of analysis of blank rat serum samples, matrix interference was not shown. The values of precision and accuracy were satisfied w the guideline. A newly developed LC/MS method for the determination of surfactin C was successfully applied in its pharmacokinetic analysis.

팔라디움 촉매하에서 산염화물과 유기주석의 커플링 반응

김두화,박정환,한도수,허선아,김성현,조성동 조선대학교 기초과학연구소 1992 自然科學硏究 Vol.15 No.1

The reaction of Asymmetrical organotins with acid chlorides in the presence of Benzylbis (triphenylphosphine) palladium(Ⅱ) chloride gave good yields of ketones in chloroform.