신호인자와 목표치가 디지털 변수인 경우를 고려한 동적 파라미터 설계 적용(2)

송종대,황규완,배홍석 慶南專門大學 2000 論文集 Vol.28 No.1

開墾地의 耕耘整地및 丞水路作業에 關한 硏究

宋錫銀,洪鐘浩 진주산업대학교 1979 論文集 Vol.17 No.-

It is necessary to develop and supply special equipment suitable for reclaimed area agriculture in accordance with the progress of agricultural mechanization. But it is more worth while to consider how to effectively use the machinery such as tractors and power tillers which have already been supplied for reclaimed area agriculture. Thus we have carried out an experiment to study the working rate slope and safety of the machine frame when this machinery is used in the area. 1. Plowing working rate of bottom plough was 35.8 minute per 10 ares on the 6 slope and 47.6 minutes on the 10 slope. These working rates were lower. than those of flat land by 44% and 33% respectively. Working rates of disc harrow on the 6 and 10 slopes were 55-76% of the working rates at the flat land. In case of power tiller, working rates on slopes were about 35-58% of those an float land. 2. Harrowing working rates on the Rotavator was 18.5 minutes per 10 ares on the 6 slope and 22.01 minutes on the 10 slope. 3. The working rate of making catch canals was 18.8 minutes per 50m of catch canal when a disc harrow was used on the 6 slope. 4. The real slope of the tractor body in the plowing operation in accordence with the different land slope is almost the same when plowing by bottom plough or plowing by disc plow. However, considering the overturn of tractor on the steep slope and the proliferation of roots it is better to plow by disc plough than by bottom plough. 5. During ploughing operation in the sloping area, the inclination of the tractor with bottom plough was more than that of the tractor equipped with disc harrow and for power tiller it was more with rubber tire than with cage wheel. 6. It was found that the steeper the slope is, the more was the slip of the tractor, or power tiller and the slip to the contour direction was more in conparition to the slip occured to the direction of the slope.

지지력 실험을 통한 지반강도정수의 추정에 관한 연구

송무효,홍석우 동의대학교 산업기술개발연구소 2001 産業技術硏究誌 Vol.15 No.-

기존의 얕은 기초의 지지력 이론은 지반이 동시파괴(전반전단파괴)를 일으킨다는 강소성을전제로 하고 있으며, 이론식 속의 지지력 계수(Nc, Nr, Nq)는 단지 지반의 내부마찰각(φ)만의 함수로 표현되어져 있다. 따라서 파괴의 진행성, 또는 재하폭에 따른 영향이 명확히 고려되어져 있지 않다. 이에 본 논문에서는 주문진사를 이용하여 중간·조밀의 모래지반을 성형하곡 재하폭(B)을 변화시켜 실험하였다. 실험결과로부터 조밀한 모래지반에서도 진행성 파괴(Progressive Failure)와 크기 효과(Scale Effect)가 나타남을 알 수 있었다. 본 연구에서는 이들 영향을 고려하기 위하여 이론과 실험에 의한 Nr의 비를 지지력계수비(Rr)라고 정의하였고, 모래지반의 내부마찰각을 추정하는 방법을 제안하였다. The theoretical bearing capacity equation of shallow foundation has been proposed under the state of a general shear failure and by using the rigid plastic theory. The bearing capacity factors(Nc, Nr, Nq) of theoretical equation are also decided by internal friction angle(φ) only of ground. Therefore, the effect of progressive failure and loading width are not considered in it. In this paper, the laboratory model tests are performed for medium and dense Joomunjin standard sand with variation of width of loading plate. From test results, the effect of progressive failure and loading width are analyzed. And, the ratio of bearing capacity factor(Rr) is defined, which can be calculated using theoretical value of Nr and experimental value(Nr') of Nr. By using ratio of bearing capacity factor(Rr), the internal friction angle of sand ground can be obtained from test results of bearing capacity.

다구찌의 2단계 최적화 모델의 필요충분조건에 관한 연구

송서일,배홍석 동아대학교 공과대학부설 생산기술연구소 1996 生産技術硏究所硏究論文集 Vol.1 No.-

Taguchi gave no justification for the use of SN ratios and no explanation of why the two-step procedure that minimize average quadratic loss. But Leon et. al suggested the connection method between SN ratios and average quadratic loss by using Performance Measure Indepentent od Adjustment (PerMIA). In this study the possibility of Taguchi's two-step optimization is defined and it shows that the expected loss function is minimized when Taguchi's two-step optimization is possible. Futhermore, one necessary and sufficient condition for the possibility of Taguchi's two-step optimization suggested. From this result, the constraints for underlying methods of Leon seems to be weaken.

국내에서 분리된 Extended-Spectrum β-Lactamase 생성 Escherichia coli와 Klebsiella pneumoniae의 빈도 및 유형

홍성근,김선주,정성훈,장철훈,조성란,안지영,신종희,이혜수,송원근,어영,염종화,용동은,이경원,정윤섭 대한임상미샐물학회 2003 Annals of clinical microbiology Vol.6 No.2

한국 엘리트스포츠 발달의 정치적 배경에 관한 연구 : 60년대부터 80년대까지 from 60s to 80s

송형석,김홍식 師範大學 體育硏究所 1997 서울大學校 體育硏究所論集 Vol.18 No.2

The purpose of this study was to investigate the political affect to Korean elite sport was developed dramatically along the Korean modern age, in 60s, 70s, and 80s. To proceed this, I presumed that the dramatic development of Korean elite sport was caused by polical intention in large part. And under this I tried to give the various example sourses supporting this preposition. The relationship between politic and sport is said that sport is used as polical means. It means that although politic and sport is under interacting process, politic have major power on sport. If this is true, what polical intention is imposed on sport? First, politic use sport as symbolic propaganda effect. In fact, if a national team made a briliant record in international game of if a government held a international game such as Olympic or world cup game and finished successfully, this fact could make better image about the country which affect the international hierachy. Secondly, sport is used as means to bind people. Under Park Jung hui government, sport was used as this effect by a series of policies and laws such as National Sport Promotion Law in 1962.

골절의 유형과 정도에 따른 전두동 골절의 치료 : 23예의 분석결과

진홍률,신시옥,최영석,송창근,용만강 대한이비인후과학회 2000 대한이비인후과학회지 두경부외과학 Vol.43 No.4

의미 속성에 따른 타동사와 부정사·동명사의 결합 연구

송석홍 경인여자대학 2002 경인논집 Vol.- No.9

This study based on the verb + infinitive gerund construction begins with the following question : (1) Are there any certain meaning differences between infinitive and gerund? (2) Do verbs have any meaning differences about future-past dichotomy, considering that the verb 'want' always takes not gerund but infinitive as its object, and the verb 'enjoy' takes not infinitive but gerund and the verb 'forget', 'like', 'begin' and 'stop' take both infinitive and gerund? (3) If yes, how can the verbs which have certain future and past distribution be compatible with infinitive and gerund also getting certain future and past distinction? In Chapter 2, this study finds that the meaning difference between the future meaning in (3)(a) and the past meaning in (3)(b) comes from the difference in the morphemes 'to' (infinitive) in (3)(a) and '-ing' (gerund) in (3)(b), which means that infinitive has the future meaning and gerund has the past meaning. In Chapter 3, this study analyzes many example sentences in which verbs have infinitive and gerund as their objects and concludes that want-class verbs have future-oriented meaning, enjoy-class verbs have past-oriented meaning, and forget-class and like-class verbs have both future-oriented and past-oriented meanings. In Chapter 4, this study suggests that to meet the condition of meaning compatibility, want-class verbs which are regarded as having future meaning should take infinitive as their objects, which has future-oriented meaning, and enjoy-class verbs with past meaning should take gerund as their objects which has past-oriented meaning. However, forget-class, like-class, begin-class and stop-class which have both future meaning and past meaning can take as their objects both infinitive and gerund, since future meaning is compatible only with future-oriented meaning and past meaning is compatible only with past-oriented meaning. The following is examples of the possible combinations of verbs and infinitive or gerund. (4)(a) He wants to smoke. (7)(a) They like to smoke. (b)^*He wants smoking. (b) They like smoking. (5)(a) ^*She enjoys to smoke. (8)(a) He began to borrow money. (b) She enjoys smoking. (b) He began borrowing money. (6)(a) I forgot to smoke. (9)(a) She stopped to smoke. (b) I forgot smoking. (b) She stopped smoking. And the meaning difference between the infinitive sentence (6)(a) and the gerund sentence (6)(b) of the verb 'forget' is strict but meaning difference between the infinitive sentence (7)(a) and the gerund sentence (7)(b) of the verb 'like' is vague. There is no meaning difference between (8)(a)and (8)(b), In(9), the meaning difference between (a) and (b) is not based on the future-past dichotomy, so (9) is an exceptional case to this study.

한국인 선천성 난청에서 Connexin 26의 분자유전학적 분석

박홍준,박기현,송정환,정영훈,최호석 대한이비인후과학회 2000 대한이비인후과학회지 두경부외과학 Vol.43 No.4

TWO-PARAMETER 탄성지반위에 놓인 고차전단변형 직교이방성 적층판의 정적 및 동적해석

송석은,이원홍 진주산업대학교 2000 산업과학기술연구소보 Vol.- No.7

Static and Transient results for a Orthgtropic laminated plate on two-parameter elastic foundations base on a higher-order shear deformation theory are presented. The effects on central deflection by plate thickness ratio, material modulus ratio, ply lamination geometry, shear and winkler modulus of elastic foundations are investigated. To validate the derived equations, the obtained deflections of simply supported isotropic plates are compared with those of Timoshenko. The information presented should be useful to composite-structure designers, to researchers seeking to obtain better correlation between theory and experiment and to numerical analysts in checking out their programs.