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공업계 고등학교 전자 회로 실습교과에서 '8051 마이크로프로세서' 단원의 교수-학습을 위한 CD-ROM 개발
김성래,최준섭,정동양,Kim Sung-Rae,Choi Jun-Seop,Chung Dong-Yang 한국공학교육학회 2003 공학교육연구 Vol.6 No.1
공업계 고등학교의 교과서인 전자 회로 실습에 기술되어 있는 8051 마이크로프로세서 단원을 중심으로 CD-ROM을 개발하기 위한 본 연구는 교과서 내용의 설명에 치우치기 쉽고 학급에서 수준 차가 있는 학생들을 대상으로 하는 교수-학습의 어려움을 극복하고, 학생들에게 교과서 내용을 중심으로 멀티미디어를 활용한 자기 주도적인 보충학습의 기회를 제공함으로써 기초학력이 부족한 공업계 고등학교 학생들의 학업 성취도를 높이는데 그 목적이 있다. 이 연구의 목적을 달성하기 위하여 $\ulcorner$문헌 연구$\lrcorner$ $\ulcorner$연구교과서 및 자료 수집$\lrcorner$ $\ulcorner$CD-ROM제작$\lrcorner$의 과정을 거쳐 순차적으로 연구가 수행되었다. 각 단계별 연구 내용은 다음과 같다. 첫째, 문헌연구를 통해서 멀티미디어의 개념 및 특징, 수업에 활용 사례 등에 대해 고찰하였다. 둘째, 교과서 및 자료 수집에서는 8051 마이크로프로세서 단원을 중심으로 교과서를 분석하고 주요 내용을 추출하였고, 그래픽, 사운드, 애니메이션 등은 직접 제작하였다. 셋째, 기본 학습주제를 8개의 영역으로 구성하였고, 체계적인 학습 흐름이 될 수 있도록 제작하였다. 이상의 연구에서 전자 회로 실습 교과서의 8051 마이크로프로세서 단원을 중심으로 CD-ROM을 개발하여 교수-학습 자료로서 하나의 유형을 제시하였으며 이러한 학습 보조 자료는 기초 학습 능력이 대체로 부족한 공업계 학생들의 학습 활동에 다양한 형태로 도움을 줄 수 있을 것으로 기대된다. The purpose of this study was to develop CD-ROM so that students can understand 8051 Microprocessor unit easily in electronics circuit practice subject of technical high school. The study gives students, who have difficulties in learning, a chance for self-directed and supplementary learning by suggesting interface process with 8051 Practice Kit. To achieve these purposes, literature survey, collecting textbooks and materials, development of CD-ROM were gradually carried out. Each steps were as follows: Firstly, in literature survey, concepts and characteristics of multimedia and application to class were reviewed. Secondly, text contents on 8051 Microprocessor unit were analyzed, main contents were extracted and graphic, sound, animation were made. It was consisted of eight basic learning subjects, and designed to flow systematically. In this study, we presented a kind of teaching-learning material by developing CD-ROM in 8051 microprocessor unit in electronics circuit practice subject as a central matter. This material will be able to help technical high school students in learning
정동진(Chung DongJin),박형진(Park HyongJin),김성래(Kim SungRae),함현식(Hahm HyunSik),박홍수(Park HongSoo),김성길(Kim SeongKil) 한국유화학회 2002 한국응용과학기술학회지 Vol.20 No.1
Environmental friendly acrylics/urea high-solid paints (BEHCU) were prepared through the curing reaction of acrylics resin(BEHC) containing 70wt% of solids content and butylated urea curing agent. BEHC was synthesized by addition copolymerization of caprolactone acrylate(CLA), 2-hydroxypropyl methacrylate(2-HPMA), ethyl methacrylate, and n-butyl acrylate. The addition polymerization of these monomers, especially including flexible CLA monomer and 2-HPMA monomer with OH funtional group, under appropriate reaction conditions resulted in polymers with controlled glass transition temperature(Tg) and crosslinking density. The molecular weight(Mw) of these polymers(BEHCs) was 2940{sim}3240 and polydispersity (Mw/Mn) was in the range of 1.61{sim}1.72. The viscosity and the molecular weight of these acrylic resins increased with increasing Tg. The coated films were prepared using curing reaction between BEHC resin and butylated urea curing agent at 100^{circ}C for 30 minutes. Our experimental resulted showed that enhancement of the coating properties such as adhesion, flexibility, impact resistance, water resistance, and abrasion resistance could be expected through introducing CLA component in acrylic resin for the high-solid content acrylics/urea coatings.
정동진 ( Dong Jin Chung ),박형진 ( Hyong Jin Park ),김성래 ( Sung Rae Kim ),정충호 ( Choong Ho Jung ),우종표 ( Jong Pyo Wu ),함현식 ( Hyun Sik Hahm ),박홍수 ( Hong Soo Park ) 한국유화학회 2003 한국응용과학기술학회지 Vol.20 No.1
N/A Acidic degreasing agent(AADA) was prepared by blending sorbitol, Newpol PE-68, Na-dioctyl sulfosuccinate, Tetronix T-701, MJU-100A, n-octanoic acid, and phosphoric acid, The physical properties of AADA tested with aluminum specimen shdhowed the following results ; when 3wt% AADA-5 was performed at 70℃, the degreasing rate was 95% which is comparitively good, and the percentage of etching was 0.277% which was found to be less than that of commercialized product. when 20wt% of AADA-5 was added at 65℃, the percentage of derusting was 91% and the good defoaming effect proved by following low foaming power tests respectively : Ross and Miles, and Ross and Clark methods.
투입식(投入式) 탈곡기(脫穀機)의 탈곡(脫穀) 및 선별(選別) 성능(性能)에 관(關)한 연구(硏究)
이승규 ( Sung Kyu Lee ),정창주 ( Chang Joo Chung ),김성래 ( Soung Rae Kim ) 한국농공학회 1975 韓國農工學會誌 : 전원과 자원 Vol.17 No.3
This study was carried out to develop the throw-in type thresher with its size as small as possible. Developing the smallest possible size of the throw-in type thresher has been very important to increase mobility and to reduce the machine price. The thresher that developed for this purpose was tested as to threshing and separation performance for the samples collected in eight catch boxes under the concave while threshing. The amount of grain collected in each compartments was measured and the threshing and separating pattern along the total span of the threshing drum was determined. The performance of separating and threshing units of the test thresher and threshing loss was evaluated by use of the developed grain separating apparatus and the method for measuring the grain separating performance of threshers. The results are summarized as follows; 1. The unthreshed grain (drum losses) and semi-threshed grain did not appeared at all throughout the treatments. 2. When threshed by making use of the developed throw-in type thresher, the threshing grain loss at about 25 per cent grain moisture was about one-half when threshed at about 18 per cent grain moisture. 3. And its grain separating loss in higher feed rate was decreased in comparison with that of lower feed rate. These results suggests that the throw-in type thresher may be suitable for wet threshing and for higher feed rate of threshing. 4. Above 60 per cent of total grain passing through concave fell through the screen within a scant 30 cm from the feeding inlet. This threshing pattern may suggest that major threshing action may be finished before about one third of cylinder length. The required separating load extended over the whole drum span is so defferent that separating elements should be redesigned so as to accomodate this variable pattern of separation load. 5. It was apparent from the experiment that the length of the threshing drum of the throw-in type thresher could be reduced from 1285mm to about 1050mm without increasing grain separation loss greatly.
김보연,권혁상,김숙경,노정현,박철영,Park Hyeong Kyu,Song Kee-Ho,원종철,유재명,이미영,이재혁,임수,Chun Sung Wan,정인경,Chung Choon Hee,한승진,김희석,민주영,김성래 대한당뇨병학회 2022 Diabetes and Metabolism Journal Vol.46 No.6
Background: Thiazolidinediones (TZDs) have been associated with various safety concerns including weight gain, bladder cancer, and congestive heart failure (CHF). This study evaluated the efficacy and safety of lobeglitazone, a novel TZD in patients with type 2 diabetes mellitus (T2DM) in real practice.Methods: In this non-interventional, multi-center, retrospective, and observational study conducted at 15 tertiary or secondary referral hospitals in Korea, a total of 2,228 patients with T2DM who received lobeglitazone 0.5 mg for more than 1 year were enrolled.Results: Overall adverse events (AEs) occurred in 381 patients (17.10%) including edema in 1.97% (n=44). Cerebrovascular and cardiovascular diseases were identified in 0.81% (n=18) and 0.81% (n=18), respectively. One case of CHF was reported as an AE. Edema occurred in 1.97% (n=44) of patients. Hypoglycemia occurred in 2.47% (n=55) of patients. Fracture occurred in 1.17% (n=26) of all patients. Lobeglitazone significantly decreased HbA1c level, resulting in a mean treatment difference of -1.05%± 1.35% (P<0.001), and decreased total cholesterol, triglyceride, and low-density lipoprotein cholesterol. However, it increased high-density lipoprotein cholesterol, regardless of statin administration. The patients who received lobeglitazone 0.5 mg showed an apparent reduction in glycosylated hemoglobin (HbA1c) from baseline during the first 6 months of treatment. The HbA1c levels remained stable between months 6 and 42.Conclusion: Lobeglitazone has long-term safety profile, good glycemic-lowering effect and long-term durability of glycemic control in real-world clinical settings.