• 건축사
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• 6호통권183호
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• pp.3-14
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• 1984

• 대한공업교육학회지
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• 제33권2호
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• pp.26-43
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• 2008

이 연구는 공업고등학교 졸업생이 대학의 동일계 학과에 진학했을 때 동일 과목 학점 인정에 관한 전문가의 인식을 조사하는 데 목적이 있다. 오늘날 대학 교육이 일반화되면서 공업고등학교 졸업생의 80% 정도가 대학에 진학하고 있다. 그러므로 공업고등학교와 전문대학, 4년제 공과대학이 연계 교육 차원에서 동일 과목 학점 인정은 교육적 낭비를 줄이기 위해 필요하다. 이 연구에서는 공업교육 분야 전문가인 공업고등학교 교사, 연구원, 전문대학 및 4년제 공과대학 교수 100명을 대상으로 설문 조사하여 84명이 응답하였으며 응답률은 81,25%였다. 이 연구에서 얻어진 결과를 요약하면 다음과 같다. 첫째, 공업고등학교 교사와 연구원은 공업고등학교 졸업생이 대학의 동일 학과에 진학했을 때 공업고등학교에서 이수한 모든 실습 과목 학점은 인정해 주는 것이 타당하다고 한 반면 전문대학과 4년제 대학 교수는 응답자의 대부분이 바람직하지 않다는 반응을 보였다. 둘째, 공업고등학교 졸업생이 전문대학 또는 4년제 공과대학 동일 학과에 입학했을 때 동일 과목은 대학 자체 소정의 시험을 거쳐 학점을 인정해 주는 것을 연구원과 4년제 대학 교수는 대부분 동의하였으나 전문대학 교수는 62.5%가 반대하였다. 셋째, 공업고등학교 졸업생이 전문대학 동일 학과를 졸업하고 4년제 공과대학 동일학과 3학년에 편입했을 때에 동일 과목은 4년제 대학 자체 인증 시험 성적이 일정 수준 이상일 때 학점 인정을 해 주는 것을 응답자 대부분이 동의하였다. 그러므로 이와 같은 경우에는 학점 인정을 해 주는 것이 타당하다.

• 대한설비공학회지:설비저널
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• 제9권2호
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• pp.111-117
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• 1980

The optimum methods of transport of fresh mackerel caught at korean coast and neighboring sea were investigated. The quality of mackerel after 3 day-stored with ice showed that the freshness were still kept. The temperature fluctuation of mackerel during transport with ice from Busan to Seoul indicated below $5^{\circ}C$, recommended by I.I.R. Heat loss of iced mackerel in transit was calculated and converted into ice weight in case of cargo truck and insulated truck. It was assumed that the semi-dressed mackerels were more effective and economic than the round ones during transport.

• 한국정밀공학회지
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• 제13권5호
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• pp.67-73
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• 1996

The necessity for more accurate automatic flatness control(AFC) system has increased of customers' requirement for cold rolled steel sheet. Therefore, many cold rolling mills replaced its AFC system with a measuring roll of the contact type form the non-contact type. In this paper. The performance of AFC system of contact type has been investigated under industrial conditions. It has two kinds of actuator: roll bender, spot cooling system. The test results are as follows: The more strip thickness is thick, the smaller the I value, and the more it is thin, the bigger the I value. And a complex distribution of strip tension was controlled, for example, not only a pocket wave but also a simple center wave and edge wave. Because the tension deviation is larger at acceler- ation speed and decelerationspeed than steady speed, AFC system of contact type is better to adopt over 50m/mim. AFC system reduces rapidly large flatness deviation. The maximum I value of strip has been decreased to 13 I, and sticker, defects caused by poor flatness, have been decreased about 60%.

• 대한조선학회논문집
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• 제61권3호
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• pp.185-199
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• 2024

Global warming impacts every corner of human life. Maritime transportation and shipbuilding industries are no exception. Recent counteraction in maritime industries is accelerating to meet the zero emission by 2050. Various alternative energy sources have been studied, and recent developments in Europe show that the windship, as a proven technology, can be an attractive candidate to solve the problem. In this paper, as the alternative transportation option, to infer the performances of modern windships, the non-dimensional ratios of past tall ships and windships are studied and reviewed. In addition, the ratios are compared to estimate the position of current and future windships under consideration. It is found that regarding the ratio distributions, the current windships being planned can be either wind-assisted propulsion ships or less fully functional windships than the past tall ships.

• 한국정밀공학회지
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• 제13권7호
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• pp.167-175
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• 1996

Work roll wear in the cold rolling of steel strip is strongly affected by rolling materials, rolling conditions and lubrication. Tests were performed to find the effects of rolling materials under the same lubricating conditions. Surface roughness of cold rolled steel strip as well as the coating technique itself is quite improtant in obtaining high image clarity of electronic products and car outer panels. Therefore this paper reviews for improvement of roughness and peak count about the surface of Cr coated work roll is investigated from the actual temper mill. The conclusions were obtained as follows; 1) Work roll wear in the cold rolling of steel strip is strongly affected by carbon contents of rolling materials, but there is not a separating force and total reduction ratio. 2) The roughness of strip surface is larger in the direction of width than in roll direction. 3) The electro-discharge textured roll has more uniform roughness distribu- tion than shot blasted roll and it's life time is two times longer than shot blasted because it has more harmonic wave roughness, and the higher peak count of surface roughness. 4) The life time of Cr coated work roll is 2 times longer than that of shot blasted work roll and variation of peak count, roughness and life time of Cr coated work roll is similar to electro-discharge texturing work roll. 5) The proper Cr coating thickness is 10 .mu. m at the work roll of temper mill.