부 타이어 소파제의 정적 장력 해석 방법

윤길수,추원효 한국수산학회 1993 한국수산과학회지 Vol.26 No.1

This paper deals with static tension analysis method for Floating Tire Breakwater(FTB). FTB can be used for the limited wave height. It is especially focused on Goodyear type FTB easily applied to the breakwater for the fisheries cultivating region. The numerical examples for FTB design procedure was reviewed. It is also studied the static analysis method of offshore catenary spread mooring system. The general calculation procedure for the tension versus excursion curves for the multi-line system using the basic catenary relationship was studied. Calculation results showed good agreement with some existing mooring results. To extend this mooring force calculating method to the floating fisheries cultivating cages, the strength of synthetic fiber was considered. This analysis method can be used to the estimation of the mooring force for the floating structures such as floating breakwaters and floating artificial reefs.

용해 개념에 대한 오인 조사 연구

윤길수 공주교육대학교 과학교육연구소 1997 과학교육연구 Vol.19 No.-

The students’ understanding of dissolution concept, the most basic concept on chemistry learning, is needed. The misconceptions of 5th grade students on dissolution were analyzed and identified, before and after instruction of dissolution. The results are follows as; 1. Students had the one-side view on the phenomena of dissolving without considering of all the situations. 2. In case of coloring solution, many students had the misconceptions of non-dissolving solution. 3. Most of students had the scientific conception on saturated solution, however the concept change of students who had the misconception was not easy, even though the instruction of dissolution was treated. 4. Understanding of the conception of mass conservation of matter was improved, after the treatment 5. Most of stuednts was not able to understand the relationship between microscopec particle conception and macroscopic phenomena of filtering solution 6. Many students thought that coloring materials in coloring solution could not be passed through filter paper. 7. Students’ misconception of evaporation of solution was remained after the treatment. 8. The representation on phenomena of dissolution using figures showed that the students’ conceptions on dissolution were scientifically incomplete, such as misconceptions of sinking of particles or that of discontinuous particles.

국민학교 자연과 교사용 지도서에 관한 고찰

윤길수 공주교육대학교 과학교육연구소 1990 과학교육연구 Vol.13 No.-

.

자연과 교사용 지도서의 개선에 관한 연구

윤길수 공주교육대학교 과학교육연구소 1993 과학교육연구 Vol.15 No.

This study invertigates how much teacher's guide has helped the teachers in the field. As a result, it is shown that few teachers use is actively I propose a better devise which can be well adapted to the actual education system, includ- ing the following advantages : ① to insert 'teaching direction' each small unit, ② to present several posible models for the inquiring in the lesson summary section ③ to present only gen- eral directions and discussion topics in order to extend teacher's creativity and autonomy, ④ to illustrate concrete data on pupils inquiry ability in educational evalution area, ⑤ to make clear some de finite classilfication items for educational evaluation as a referance

무게 개념에 대한 오인 조사 연구

윤길수 공주교육대학교 과학교육연구소 1994 과학교육연구 Vol.16 No.

The Purpose of this study was to investigate students misconceptions of weight held by both elementary and college school students. The findings emerging from the present study may be summarized as follows : 1. Students think that weight is changed when measured with the shape of the object changing, which are affected by the intuitive ideas of the task. 2. Students think that weight is changed, when objects float or sink in water, which are due to the defect of the logical reasoning ability. 3. Students think that the weight of objects decreases when objects are dissolved in solvents, which are affected by the perceptual dominate thinking. 4. It was noted that elementary students have more misconceptions due to the perceptual dominate thinking or the intuitive ideas than college students. The frequency of misconceptions due to defects of logical reasoning was not different from college students. 5. College students have many misconceptions of weight, which verified that the scientific conceptions do not replace the existing misconceptions, but consistent after instructions.

해양산업의 전망

윤길수 대한조선학회 1992 大韓造船學會誌 Vol.29 No.3

半潛水式 海洋構造物의 波力推定

尹吉秀 釜山水産大學校 1984 釜山水産大學 硏究報告 Vol.24 No.1

계산하기가 비교적 어렵고, 정시간을 요하는 반잠수 해상구조물에 미치는 波力을 Hooft의 근시방법을 이용하여 계산하였다. 본 계산방법에 의하면 간단한 계산만으로도 波기진력 추정이 가능할 뿐만 아니라 소요되는 계산시간이 짧은데 비해 계산 결과도 실험치와 잘 일치하고 있다. 다라서 초기 설계 단계의 해양구조물의 波기진력 계산에 이용할 수 있으며, 운동계산에의 이용도 가능할 것이다. 더구나 본 계산은 Apple CP/M fortran으로 작성, 수행되었음을 밝힌다. 아울러, 대형전산조직의 사용을 절감시킬 수 있을 것으로 기대된다. This paper presents an approximation method for wave force on semi-submersible platforms. The approximate values for 2-D circular cylinder added masses and calculation method was made use of the Hooft's works. The procedure was computerized and varified with the STAFLO platform. The calculation results were compared with the experimental data of NSMB and showed nearly same values.

원격강의 경험기

윤길수 대한조선학회 2000 大韓造船學會誌 Vol.37 No.2

繫留된 雙胴船의 運動解析

尹吉秀 釜山水産大學校 1989 釜山水産大學 硏究報告 Vol.29 No.1-2

According to increasing need of ocean development, it is necessary for the dynamic analytical method of moored floating bodies. The 2-D problem of moored floating objects was solved numerically as a boundary value problem by direct use of Green's identity formula for a potential function by Ijima et al. They treated floating bodies having mono-hull with taut mooring system for shallow water. In this paper, Ijima's method was extended to catamaran with catenary mooring system for deep water. The dynamic characteristics of catamaran with catenary mooring system showed good agreement with Simada's result. v

크세논와 플루오르화합물의 구조에 관한 고찰

윤길수 공주교육대학교 초등연구원 1987 公州敎大論叢 Vol.23 No.1

Since Bartlett obtained a crystalline solid [Xe+] [PtF6~] in 1962 by the reaction of Xe and PtF6 , the concept that the noble gas is inert was collapsed. This discovery led to rapid and extan�sive development in noble gas chemistry, particularly in xenon chemistry. This thesis has been focused on the structure of xanon compounds. The interpretation of Xenon fluorides structure is made in terms of a VSEPR or by molecular orbital theory for three-center-four-electron baon. The linear structure of XeF2 and square planar structure of XeF4 can be explanied by both theories, but the sturcture of XeF6 is uncertain. Theoretical work on the structure of XeFg and all the experimental data indicate the struture to be substantially distorted octahedral but stereo-chemically nonrigid one. The solid crystal of XeF6 forms ionic compound which can be represented by the chemical formular [XeFs+] [F-] and this crystal is made of tetramers of hexamers. One of the characteristic reaction of binary fluorides (XeF2, XeF4, XeF6) is the transfer of F- to strong fluoride acceptors to form compounds containing cation of the type XeF+, XeF3+ or XeFs+. There are electrostatic attractions between fluorocation and fluoroanion (MF6-), but actually these compounds are not fully ionic, since the fluoroanions form fluoro-bridges to the cations. The structure of these compounds has been studied extensively by X-ray and Raman spectroscopy and the results were following; XeF is linear, XeF3 is bent T shape, XeFs is square pyramidal, and MF6~ is distorted octahedral. Another experiment showed that XeF6 acts as a fluoride ion acceptor since it reacts with alkalifluorides to give XeF7- or XeFs2-, but the structure of the anions has not been fully determined yet.