위암의 연령에 따른 차이

김영재(Young Jae Kim),이영철(Young Chul Rhee),이만길(man Kill Lee),차호(Ho Cha),정영채(Young Chae Jung) 대한소화기학회 1987 대한소화기학회지 Vol.19 No.1

N/A Comparative analytic review on clinical, endoscopic and histopathological findings was done in 13 cases of young age (under 29), 446 cases of mid age (30~69) and 39 cases of old age (above 70) stomach cancer who were visited Department of Internal Medicine of Masan Koryo General Hospital from March 1981 to July 1985. The following results were obtained: The peak of age incidence was the 5th decade amounting to 36.8%. The ratio between male and female was 2.6:1. The main chief complaint of each group was epigastric pain and it was followed by epigastric fullness. The most patient had the duration of symptom from 3 months to 6 months. For old-age group, mid-age group, major site of lesion in the antrum, meanwhile body for young-age group. The most frequent type of gastric cancer was type III in each group by Borrmanns classification. For each group, adenocarcinoma was major cases in the view of histopathological findings, and incidence of well differentiated type adenocarcinoma were lower in young-age group than others.

학습동기와 인지적 노력 및 학업 성취간 관련성

이영식,조현철 全北大學校 敎育大學院 1999 敎育論叢 Vol.19 No.-

The effects of 266 high school students' learning goal orientations on academic achievement through the mediating variables such as cognitive engagement were analysed. The general results could safely be interpreted to support the former findings and theoretical predictions based on the goal theories and self-efficacy theories. Learning goal orientation was found to be positively related with both meaningful and shallow cognitive engagement and perceived ability. But performance goal orientation has no significant correlation with any other variable except shallow cognitive engagement. And perceived ability was reported to have high correlations with leaning goal orientation meaningful cognitive engagement and academic achievement. A path analysis of a model postulating the causal effect of leaning goal orientation and perceived ability on academic achievement through the mediating role of meaningful cognitive engagement was proved to be statistically sound. And the educational implications of the findings were discussed.

自然神秘主義詩에 關한 比較硏究 : Vaughan과 Wordsworth

李英哲 충남대학교 인문과학연구소 1978 인문학연구 Vol.5 No.1

In this paper my purpose is to inquire into the essence of the religious poetry on the ideas of pantheism chiefly in the two mystical nature-poets, by making a critical comparison of their views of the "Unifying Nature" and of the "Immortality of the Soul", The noble lines entitled to Vaughan's Retreat has often been said to have an important effect upon Wordsworth's Intimation of Immortality. It is because the thought expressed in the famous Ode is, as has often been pointed out, similar in some respects to the thought in the noble Retreat; there is an essential similarity to the views of the two poets. Like Vaughan, later Wordsworth is also anxious to look back upon his childhood with regret, because both poets believe in nature as the expressions of their purest mind and return to her. They think that children, like stars or flowers, observe the law of thier being unconsciously and inevitably. The following observation quoted from Paulinus' Primitive Holiness is equally applicable to both Vaughan and Wordsworth. The origin of all things of "All things long for their First state", in which The Seed growing Secretly revives again, suggests an essential element of the Soul of child. This fundamental principle as a metaphor of the Soul, in which a divine flame is burning, builds up the theory of the resurrection of the Soul of child. It is no doubt that the famous epigraph to the Ode, "The Child is father of the Man" was affected by the noble lines of "Some men a forward motion love, / I by backward steps would move, / And when this dust falls to the urn / In that state I came return." Vaughan (who "has Nature for his mistress too") and Wordsworth as a "Nature's Priest" turn to nature not only to envy and admire but also discover. In the Book of Nature (that's God's Book) Vaughan contemplates the ordered motions of the stars to glorify the exact obedience of that "Fair, order'd lights" which he calls Constellation. In the same spirit Wordsworth also contemplates the ordered motions of the daffodils beside the lake, comparing to the stars shining on the Galaxy, and turns the pages of God's Book to find the prescriptions of that "Stern Daughter of the voice of God" whom he calls Duty. The Christianized Platonism does not only emphasize the most pervasive influence of Origen & Donne & Herbert on Vaughan, but also underscores that of Plato & Spenser & Vaughan on Wordsworth which is also the most difficult to demonstrate. What strikes us most forcibly after a reading of the two poets' religious lyrics, is the immediacy of their spiritual longing, their yearning for Eternity and their thirst for the lost paradise of innocence. Vaughan says, "Faith into life breaks, and death dies": this passage shows the essence of his religious poetry, ardent longing for Eternity. Wordsworth enters intuitively into the dream-like glorious world of Nature and there slakes his thirst for God; he must learn through his suffering heart another way into the Eternal World of the spirit.

저위상잡음 자기발진믹서의 설계에 관한 연구

이영철 慶南大學校 附設 工業技術硏究所 1997 硏究論文集 Vol.15 No.1

본 논문에서는 저위상잡음특성을 나타내는 자기발진믹서를 설계하였다. 설계된 저위상잡음 자기발진믹서기는 고안정 유전체를 적용한 국부발진기와 IF단에서의 스퓨리어스발진을 방지하기 위한 영상제거필터(image rejection filter)로 구성하였다. 설계된 자기발진믹서는 C-대역 위성하향변환기(downconverter)에 적용시키기 위하여 국부발진기의 주파수를 5.15GHz로 설정하였으며 설계된 자기발진믹서의 위상잡음은 100KHz의 offset주파수에서 -111.8 dBc/Hz의 특성을 보였으며 주파수를 3.2∼4.2GHz의 범위에서 변환이득은 7∼12.2dB의 범위를 나타내었다. 설계된 자기발진 믹서의 RF-SOM사이의 분리도는 23dB, IF-SOM사이에서의 분리도는 46dB의 특성을 보였다. 이와같은 단순화된 자기 발진기는 디지털 위성방송 하향변환기에 적용할 때, 부품의 감소 및 저가 고성능의 효과가 있다. In this paper, we have developed a Self Oscillating mixer SOM with low phase noise. A self osillating mixer is consisted of stabilized dielectric resonant oscillator and image rejection filter to prevent a suprious at the intermediate frequency. Designed self oscillating mixer frequency is 5.15GHz to apply C-band satellite broadcast downconverter, its provides that phase noise in -111.8 dBc/Hz at 100KHz offset frequency, a minimun conversion gain is 7∼12. 2dB and We obtained that isolation between RF-SOM is 23dB and IF-SOM is 46dB respectively. Designed simple self oscillating mixer structure reduces components and leads to lower cost and high performance for the digital DBS downconverter.

Helicobacter pylori 편모 유전자의 클로닝 및 염기서열 분석

이광호,이우곤,조명제,도영미,백승철,강경희,박필성,이상룡 경상대학교 유전공학연구소 1993 遺傳工學硏究所報 Vol.12 No.-

A λgt11 expression libary of H. pylori DNA in E. coli Y1090 was screened with flagellin-specific rabbit antiserum for molecular cloning of the flagellin gene of H. pylori. A positive clone, λHPF4, was obtained and the recombinant antigen expressed from λHPF4 was a fusion protein with the molecular weight of 168kd. Sequence analysis of antigen-encoding DNA showed that an open reading frame composed of 1,536 nucleotides encodes a polypepride with a oredicted molecular size of 54kd. This open reading frame did not show the homology with flaA gene encoding 56kd protein of H. pylori and was confirmed as a unique sequence through homoligy searching. Therefore, the cloned antigen is supposed to be the carboxy-terminal region of the other flagellin protein of H. pylori, flaB, with the molecular weight of 58kd.

Apodized SAW 정합필터를 이용한 Sidelobe 감소방법에 관한 연구

李永哲 慶南大學校 附設 工業技術硏究所 1983 硏究論文集 Vol.1 No.-

레이다 시스템에서 펄스 압축 정합필터의 역할은 매우 중요하며 최근에는 SAW을 사용하여 펄스 압축 효과를 얻고 있다. 본 논문에서는 SAW 정합필터의 출력파형에서 Spatial 안테나 이론과 매우 유사한 Sideloeb현상의 감소방안으로 Amplitude weighting 함수를 적용, Apodized SAW 정합필터를 제작하였으며, 그 결과 실험값과 이론값을 비교 제시하였고, 함수의 특성과 그 영향에 의한 압축펄스의 Sidelobe 감소현상을 묘사하였다. The pulse compressed matched-filter use in a variety of important radar system. SAWs offer several advantage in the pulse compression. The consequence of the SAW matched-filter output signal is the presence of sidelobes on the SAW filter output pulse analogous to the spatial antanna theory. A method to reduce the sidelobe is explained by Amplitude weighting functions. Mathematically, the Weighting process is described, and calculated compressed pulse envelops, weighting network characteristics and effects. The prediction to these theory is compared with experimental filters which is apodized on the SAW material substrate.

PIN-GaAs MESFET를 이용한 Giga bit/sec. 광 수신전치증폭기의 설계

이영철 慶南大學校 附設 工業技術硏究所 1990 硏究論文集 Vol.8 No.-

고속정보시스템의 요구의 증대에 의하여 Giga bit/sec 광통신시스템의 발달이 가속되고 있으므로 본 논문에서는 PIN-GaAs MESFET를 이용하여 광 수신 전치증폭기를 설계, 분석 하였다. 전치증폭기의 감도를 분석하였으며 1.2G b/s 전달임피던스형 증폭기를 설계하였다. 측정결과 InGaAs PIN photodiode를 사용하였을 때 700M b/s와 10? bit error rate에서 -27.1dBm의 감도와 750MHZ의 대역폭을 얻었다. 설계한 증폭기의 주파수반응 특성은 이론적 예측값과 일치하였으며 SPICE를 이용하여 이론값을 예측하였다. This increasing demand for high speed transmission systems has accelerate the development of Giga bit/sec optical fiber systems. In this paper, PIN-GaAs MESFET Giga bit/sec. optical preamplifier circuit is designed and analyzed. The preamplifier sensitivity is analyzed and the 1.2G b/s transimpedance preamplifier designed. The measured results for 1.2 Gb/s preamplifier is a 750MHz bandwidth with InGaAs photodiode and -27.1dBm sensitivity at 700 M b/s and 10? bit error rate. Frequency response of the designed amplifier agrees well with a theoretical prediction which is analyzed by SPICE program.

A THEMATIC STUDY OF ROBERT FROST'S POETRY : HUMANISM을 중심으로

李永哲 서울여자대학교 1976 서울여자대학논문집 Vol.- No.5

The question set for this study is to decide whether Frost's philosophy inclines towards "Naturalism," towards "Humanism," or toward both. "Naturalism" as a literary philosophy is an outgrowth of the Nineteenth century biological determinism and aims at an objective portrayal of man in relation to the imperatives of his environment. In this view, the actions and reactions of the subject are determined by biological necessity and/or external stresses, and the exercise of Free Will, as such, is non-existent. The author makes no moral or ethical judgements, functioning strictly as a detached and objective observer. "Humanism" as a philosophy takes the opposite view. Growing out of a critical movement which nourished in the United States in the 1920's, it discounts the effect of biological and environmental determinants and stresses the overriding importance of Free Will. Man in this scheme of things, rather than being merely a creature of nature, has, and exercises, discriminative, moral, and ethical perspective; and the author who recounts his actions is freed of the strictures of scientific detachment. Frost's portrayal of man belongs to the following categories; First, man is an ethical being with responsibilities to his fellow men and society. Second, man is endowed with Free Will to mould and shape his own fate. Third, man is capable of offering compassion and love. Fourth, Frost has-faith in man and affirms life in spite of his conception of life as a tragic'experience. Finally, Frost portrays man as a limited being in his power of recognition. In Frost's scheme of things, it is not biological necessity or self-interest which drives his characters but their realization of their mutual responsibilities as human beings. Frost, in this regard, is not a Naturalist but a true Humanist.

기능성 소화불량증에서 증상에 따른 고형식의 반위배출시간의 차이

김영호,이풍렬,성인경,손희정,김재준,고광철,백승운,이종철,최규완 大韓消化器病學會 1998 大韓消化器病學會誌 Vol.32 No.3

초광대역 균일 이득 마이크로파 증폭기의 설계

이재영,이영철,정원용 慶南大學校 附設 工業技術硏究所 1999 硏究論文集 Vol.17 No.-

본 연구에서는 광대역 특성을 가지는 마이크로파 증폭기를 실주파수법과 귀환증폭기의 광대역 특성을 이용하여 설계주파수 대역에서 설계하였다. 마이크로파 프로그램을 이용하여 귀환 증폭기의 임피던스 정합은 실주파수법을 사용하였다. 설계된 1단 초광대역 증폭기는 0.1~12GHz 대역에서 이득은 7.5dB±0.4dB, 입력과 출력 정재파비는 각각2.0±0.6과 1.8±0.6을 나타내었고, 2단 증폭기의 이득은 15.4dB ±0.5dB. 입력과 출력 정재파비는 각각 1.9와 2.1을 나타내었다. In this paper, we designed a Ultra-wideband microwave amplifier which has the feedback circuits and real frequency impedance matching circuits. With the microwave program, the impedance matching of the feed-back amplifier used real frequency method and theoretically. The designed one stage Ultra-wideband Amplifier shows the 7.5dB±0.4dB gain, and the input and the output VSWR is 2.0±0.6 and 1.8±0.6, respectively. The two-stage amplifier shows the 15.4dB ±0.5dB gain, and 1.9 and 2.1, the input and the output VSWR at 0.1∼12GFz frequency band.