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English-only Education Movement in the U.S.: Focusing on Proposition 227
Jun-Eon Park 한국사회언어학회 2004 사회언어학 Vol.12 No.1
Park, Jun-Eon. 2004. English-only Education Movement in the U.S.: Focusing on Proposition 227. The Sociolinguistic Journal of Korea, 12(1). This paper analyzes the recent English-only movement prevalent in the United States of America, focusing on Proposition 227, which was enacted as California Educational Code in 1998. Seemingly, the legislation of 227 is considered a victory of pro-English monolingual activists, who have propagated their anti-bilingual sentiment throughout the nation since the 1980s. Advocates of English-only education maintain that bilingualism and bilingual education do much harm to the limited English proficient students by obstructing the development of English proficiency, whereas advocates of bilingual education rebut this argument as groundless and misleading. Unless Proposition 227 is overturned by California voters, the educational law is expected to exert its legal power in oppressing bilingualism and bilingual education that have been appraised as beneficial to the education of ethnic minority students in the state.
싱글 튜브 시스템 BTA 工具를 使用한 SM55C 鋼의 深孔 加工 特性에 관한 硏究
全泰玉,全彦燦,沈成輔,張性圭 동아대학교 공과대학 부설 한국자원개발연구소 1994 硏究報告 Vol.18 No.2
The BTA deep hole machining has an increasing demand because of its wide applications and its good productivity. The main feature of the BTA drill is that the tool cutting edges are unsymmetrically located on the boring head. This provides a stabilizing cutting force resultant necessary for self guidance of the boring head. The BTA drills are capable of machining for having large length to diameter ratio in single pass. The study of the accuracy and surface finish of holes produced would reveal quite useful information regarding the process. This thesis deals with the experimental results obtained during single tube system BTA machining on SM55C steel for different machining conditions.
전태옥,전언찬,박흥식,배춘익 동아대학교 공과대학 부설 한국자원개발연구소 1995 硏究報告 Vol.19 No.2
Temperature distribution on the flank face in orthogonal turning with cutting tool of high speed steel is studied by using a finite element method and experiments. Experiments are carried out to verify the validity of the temperature measurement by using a thermoelectric couple junction imbedded in a cutting tool. Good agreement is obtained between the analytical results and the experimental ones for the temperature distributions on flank face of cutting tool Flank wear were observed by the tool microscope. The analytical results show that the temperature on the top flank face of a tool is higher because of the difference of the friction velocity on each face of the tool.
全彦燦,芮圭玄,朴興植,全泰玉 東亞大學校 1989 東亞論叢 Vol.26 No.1
The present study was undertaken to investigate the otheogonal cutting mechanism of pure aluminum with sintered carbide tools, such as the cutting resistance, shear angle and work, the formation of chip and the instantaneous aspect for cutting process. The results obtained are as follows: 1. In case of negative tool rake angle, the decrease rate of cutting resistance was progressed till high speed cutting. 2. When the cutting depth is small, the shear angle of cutting part depends on the influence of size effect. 3. The formation of chip is classified into shear type, vertical compression type, horizontal compression type and flow type. 4. The measurement of the built-up edge was able to obtain decreased by the geometric expression of the instantaneous aspect for cutting process.
全泰玉,全彦燦,朴興植,朴永宅 동아대학교 공과대학 부설 한국자원개발연구소 1989 硏究報告 Vol.13 No.2
In this paper, results of test about machinability of the carbide tools having various tool angle on light cutting are described. The conclusion is as follows ; 1. According to the increase of cutting speed, specific cutting forces are decreased. 2. According to the increase of cutting speed and feed, chip width and chip thickness are both decreased. 3. The experimental roughness of working surface became smaller than theoretical roughness. 4. Size of burrs decreased with increase of disengage angle.
全泰玉,全彦燦,朴興植 동아대학교 공과대학 부설 한국자원개발연구소 1984 硏究報告 Vol.8 No.2
For the study, thermoplastic rigid polyvinyl chloride, which has been widely used for the parts of machine, has been applied as high polymetric materials and has been investigated into relationship between circumferential surface and steel sphere in order to clear the characteristics of the softened surface layer with frictional velocity, contact load and feed. The results obtained are as follows. 1. In constant frictional velocity, as the contact load was increased by degree the coefficients of friction was slowly decreased and it has inclination of increasing by softness on the surface layer according as the contact load was increased. 2. In constant contact load, as the frictional velocity was increased by 63m/min the coefficients of friction was slowly decreased, and in more than, the coefficients of friction was rapidly decreased by a lubricating effect of the frictional surface layer. 3. The fusional trace on the harden polyvinyl chloride was appeared by the frictional force with it according as the frictional velocity and the contact load were become high, especially appeared the deep ones with softening on the frictional surface. 4. Under condition of feeding, the coefficients of friction of a new surface was high in higher than 503m/min of the frictional velocity, but low in lower than the value comparing with repeated friction.
공터키안(Empty sella)을 동반한 급성췌장염으로 발현된 부갑상선 선종 1예
전언주,오지혜,배경륜,장샛별,전승운,정의달,손호상,원규장 영남대학교 의과대학 2009 Yeungnam University Journal of Medicine Vol.26 No.1
The incidence of coexisting hyperparathyroidism and empty sella syndrome is rare and the etiology and incidence of their coexistence is not known. The association of hyperparathyroidism and the empty sella syndrome may be related to multiple endocrine neoplasia (MEN) syndrome due to a genetic disorder. We experienced a rare case of hyperparathyroidism presenting as acute pancreatitis combined with empty sella. We report here a 37-year old female who manifested epigastric pain because of acute pancreatitis. She had hypercalcemia due to parathyroid adenoma. A pituitary gland was not visible in the sella turcica on MRI scans. On genetic analysis, she did not show a mutation of the MENIN gene. Empty sella is thought to be a coincidental finding with hyperparathyroidism.
라이시안 페이딩 환경에서 RAKE 수신 다이버시티를 적용한 길쌈 부호화된 DS-CDMA 16 QAM 신호의 성능 해석
김세준,김언곤 한밭대학교 정보통신전문대학원 2005 정보통신전문대학원 논문집 Vol.3 No.1
본 논문에서는 라이시안 페이딩 환경에서 길쌈 부호화된 DS-CBMA 16 QAM 신호의 레이크 다이버시티 수신 기법 채용시 오율 성능을 해석한다. 고르지 못한 채널 환경에서 BER 성능을 향상시키기 위해 다중 경로 페이딩에 효과적으로 사용할 수 있는 레이크 수신기를 소개한다. 해석 결과에 의하면 레이크 다이버시티 기법은 수신 안테나 수의 증가에 따른 성능 개선을 보였다. 또한 다이버시티 수신 기법과 길쌈 부호화 기법을 함께 채용하여 이동 무선 데이터 통신채널 환경을 극복할 수 있는 성능 개선 효과를 보인다. In this paper, we analyzed the error rate performance of Convolution coded DS-CDMA 16 QAM signal with rake diversity reception technique in Rician fading environments. In order to improve BER performance in poor channel environments, we have introduced the Rake receiver able to effectively use against multi path fading and the Convolution code well known as a channel coder. With the results of analysis, rake diversity technique is found that performance improvement is show by increase of receiving antenna number. And it is found that a synergistic performance improvement is show to both rake diversity reception and Convolution coding techniques overcoming mobile wireless data communication channel environments.
라이시안 페이딩 환경에서 RAKE 수신 다이버시티를 적용한 BCH 부호화된 DS-CDMA 16 QAM 신호의 성능 해석
김세준,김언곤 한밭대학교 2004 한밭대학교 논문집 Vol.21 No.-
In this paper, we analyzed the error rate performance of BCH coded DS-CDMA 16 QAM signal with rake diversity reception technique in Rician fading environments. In order to improve BER performance in poor channel environments, we have introduced the rake receiver to effectively use against multipath fading and the BCH code well known as a channel coder. With the results of analysis, rake diversity technique is found that performance improvement is shown by increase of receiving antenna number. And it is found that a synergistic performance improvement is shown to both rake diversity reception and BCH coding techniques overcoming mobile wireless data communication channel environments.