大學綜合試驗 出題에 關한 硏究

卞烘圭,吳鎭坤,申鎔鎭,金泳喆,鄭求福,柳哲鍾,洪允杓 全北大學校 1977 論文集 Vol.19 No.-

The Comprehensive Examination for the undergraduate students is planned to adopt the Jeonbug National University for the purpose of enhancing the quality of its educational outputs. In order to effectively measure and evaluate the level of student progress toward the minimun standard as the students who have finished their general education and basic education for their major field study, the university has decided to make an item pool related to the subjects for the examination. This study is an attempt to make good items of five required courses among general education subjects which are Korean Language, English, Korean History, National Ethics. and Natural Science and are expected to be the subjects of the examination. Instead of making those items separately from the regular examination during the academic semesters, the university plans to collect and use good items from the usual mid-term and final examinations of those subjects. A key concern, in this study, therefore, is to analyze all the items used for the mid-term and final examinations of those subjects during the regular academic semesters. From the data of an about 100 sample in each subject at each time of total three tests, the difficulty index, discrimination index, the response rate of students on each item, and other general descriptive statistics are calculated and then good items are pooled for the future use for the Comprehensive Examination. Anhother important concern in this study is this study is given to the collection and analysis of controversial issues and problems on the process of operating the examination at other universities where the Comprehensive Examination is already adopted. The data from four institutions and from opinions of six participants of this study are used. The following main findidings are summarized : 1. The items have generally shown to be easy while the degree of discrimination is low. 2. Among the five subjects, Korean Language shows the highest rate of right answer (difficulty index) while English the strongest one in the discrimination index. 3. When comparing two types of test between the multiple choice and the short-answer, the latter seems to be powerful in both difficulty and discriminative. 4. The only one question of essay type test reveals clear limitations in scoring and evaluating students progress. 5. All items are constructed under the consideration of content-referenced base, not of the basis on behavioral aspect. 6. The analysis of issues and problems related to the Comprehensive Examination suggests that it is acceptable to test in terms of required subjects of general education and a few most basic subjects of major areas of study. 7. The examination can be functionally operated when it is held at the end of the first year of and before the beginning of the second year of the college years. The length of the examination is usally held from three to five hours. 8. Since the examination should be existed on the idea of criterion-referenced base rather than of norm-referenced one because of its testing the qualification of the entering behavior of students for the further study in their major field, the standard of the pass-and-failure should be set on at least 60 percent of correct answers in each subject. But there must be provided at least two additional opportunities for the make-up examination for those who failed in the first one. 9. A special committee must be established in order to deal with all the details related to the Comprehensive Examination.

알칼리환원수 음용이 급성 염증성장질환 생쥐 모델에 미치는 영향

김단,김동희,등영건,최주봉,이규재 韓國電子顯微鏡學會 2008 Applied microscopy Vol.38 No.2

알칼리환원수 (Alkaline Reduced Water: ARW)는 아시아를 비롯한 여러 나라에서 음용수로 사용되고 있으며 항산화효과와 장내이상발효 개선효과 등을 중심으로 안전성과 유효성의 검증이 이루어지고 있다. 본 연구에서는 알칼리환원수가 급성 염증성대장질환 (Inflammatory Bowel Disease: IBD) 동물모델에 미치는 영향을 알아보기 위해, ARW를 2주 동안 급이 시킨 후 4% DDS로 염증성 대장염을 유발시키고 대장의 길이와 조직병리학적 변화를 관찰하였다. 그 결과 대장의 길이와 육안적, 현미경적 질환점수의 수치가 대조군과 비교하여 유의한 차이를 나타내지 않았다. 이 결과는 DSS로 유도된 급성 염증성장질환 모델에서는 2주 동안의 ARW 급이가 개선효과를 나타내지 않았음을 말해준다. 그러나 ARW 가 장내환경을 개선시키고 위장관의 질환을 개선시키는 효과가 있음을 고려해볼 때 급성 IBD 동물모델이 ARW의 효과를 증명하기에 적합하지 않았거나 MARW의 급이기간이 장내환경을 개선할 만큼 충분히 길지 않았을 가능성을 추측해 볼 수 있다. 알칼리환원수의 장내이상발효 개선효과는 확인되고 있으나 그 기전은 아직까지 구체적으로 확인되어지지 않고 있다. 이번 연구결과에 의하면 인위적으로 유발시킨 급성 염증성 동물모델에서 ARW가 유의한 영향을 미치지 않았지만, 다른 장질환 모델을 이용한 효과 검증과 ARW의 장기 급이에 따른 효과, 그리고 ARW 가 장내환경에 미치는 작용기전에 대한 연구가 더 깊이 있게 이루어져야 할 것으로 사료된다. Alkaline reduced water (ARW) has been used for drinking widely in several countries of Asia. The safety and clinical effects of ARW has been reported including anti-oxidative effect and intestinal abnormal fermentation. To confirm the effect of ARW on DSS-induced acute inflammatory bowel disease (IBD) mouse model, we observed the length of total large intestine and the histopathological changes after supplying mineral induced-ARW (MARW) for 2 weeks and oral administration of 4% DSS (dextran sulfate sodium). As the result, the length of total large intestine and the disease scores by macro and microscopical access in the ARWsupplied group showed no significant differences compared with those in the control group. This result suggests that the supply of ARW for 2 weeks exerted no effect on amelioration in the DSS-induced acute IBD model. However, in consideration of the effect of ARW on the improvement of intestinal environment and gastrointestinal disease, this result seems that acute IBD animal model is not suitable or the period of ARW supply is not enough to prove the effect of ARW. The ameliorative effect of ARW on the intestinal abnormal fermentation has been confirmed by some researchers, but the precise mechanism also remain unclear. In conclusion, although MARW had no effect on the DSS-induced acute experimental colitis model, further studies on the verification of the effects of ARW by using other intestinal disease model and by long-term supply of ARW will be required. Also, It needs to clear the mechanism of ARW on the intestinal environment.

미생물 작용에 의한 에너지 변환의 화학공학적 연구

조진식,이태희,조영일 연세대학교 산업기술연구소 1980 논문집 Vol.12 No.2

As a typical energy conversion process by microbial action, the methane generation from organic substrate in wastewater was studied through anaerobic fermentation using synthetic wasterwater. To increase the generation rate was added the powdered activated carbon(PAC) into the reaction system. Experimental results showed that the carbon enhanced the gas production rate and the content, which implicates the change of the reaction paths by the carbon. The gas generation rate was found to be expressed by a form of Monod equation introducing a promotion factor as a function of the carbon.

域內 化纖業體의 經營事例 分析 : A企業을 中心으로

李鎭春,鄭忠泳 慶北大學校 産業開發硏究所 1983 硏究報告 Vol.11 No.-

The purpose of this study is to analyze the managerial situation and to understand the administrative level of fiber & textile companies, especially chemical textile firms located at Taegu area. Simultaneously pointing out managerial problems and operational difficulties, this paper looks for a reform measure for them and examines their growth-potentials. For the sake of analysis, this study uses a case study of "A" company as its methodology. The analysis finds out the deficiency on present Income Sheet. Moreover many managerial problems are found. From the managerial rationalization point of view, it is required to adapt the cost control system and the independent profit system in order to solve the present difficulties. In addition, this paper concludes that regional chemical textile firms have many problems and difficulties in light of the "A" firm case. Therefore someone has asserted coming-declining-stage of textile industry. But a rational solution of those problems can provide much growth-potential for the regional chemical textile firms.

春秋薯別 GA處理에 따른 生肉및 收量比較試驗

李永仁,徐大振 진주산업대학교 1978 論文集 Vol.16 No.-

本硏究는 1978년 3월∼6월에 걸쳐 본교 實習圃場에서 試驗前年 大關嶺採種地에서 購入한 春薯種과 前年 8월∼10월에 걸쳐 增殖시켜 파종한 秋薯種間에 있어서 生育 및 收量比較試驗과, GA처리효과를 동시에 보기 위하여 두 품종을 동시에 파종한 結果 몇가지 結果를 얻었기에 報告하는 바이다. 1. 秋薯種은 春薯種에 比較하여 地上部의 形質量이 많거나 컸고, 塊莖重의 差異는 나타나지 않았으며 株當塊莖數는 적어 大薯收量에 있어서 秋薯種이 많은 것으로 나타났다. 2. Ga처리에 따른 효과를 보면 GA濃度水準에 따라 草長은 깊어졌으며 莖直徑은 가늘어져 약간 도장한 傾向을 나타냈고 그 외의 形質에 있어서는 일정한 경향을 보이지 않았으며, 秋薯에 있어서는 오히려 수량이 減少하는 傾向을 보였다. To study the effect of GA Treatment and seed differences on the tuber formation and growth of Potato, Spring seed potatoes were obtained from alpine reaion and then Propagated by fall cvop Production for spring crop Production experiment by fora year. this experiment was carried out at the nxperimental farm in 1978. The results were Summarized as follows; 1. In fall seed Pototo, tuber formation was like that of spring seed potato, but sprieg seed potato treatment showed tendency of shoot growth reduction. 2. In all the GA treatments, height of plant and stem diameter were more longer and slender according to GA treated level, no relation ship was found in promoting or inhibiting effect about other character, but GA treatments in fall Seed Potato showed inhibition.

Fe₃O ₄-Al₂O ₃-CaO系 鑛球의 還元에 關한 硏究

양훈영,이승원,김진호,은일상 연세대학교 산업기술연구소 1975 논문집 Vol.6 No.1

Reduction of coke mixed magnetite ore pellets containing alumina and/or lime has been carried out in a fixed bed with coke powder in the temperature range of 1,100-1,250℃. Degree of metallization of the reduced pellets was obtained from the chemical analysis, and volume change of the reduced pellets was evaluated by measuring pellet diameter before and after reduction. Phase change during the reduction was also investigated by microscopic observation. The results obtained are summurized as follows. (1) As the Al₂O ₃content increases, degree of metallization of the ore pellets decreases and shrinkage of the reduced pellets also decreases. (2) Addition of 5% CaO to the 5% Al₂O ₃ pellets improves the degree of metallization and increases shrinkage of the reduced pellets, especially within the temperature range of 1,200-1,250℃. In the case of 10% CaO addition to the same pellets, however, both degree of metallization and shrinkage decrease. (3) CaO addition to the 10% Al₂O ₃ pellets showed the similar effect to that of 5% Al₂O ₃ pellets on the degree of metallization and shrinkage, showing no conspicuous effect of lime addition. (4) While Al₂O ₃ in the pellets is inhibitive to the reducibility as well as agglomeration, CaO is promotive to the above properties.

FSK의 周波數 檢波方式에 對한 信號處理의 改善에 關한 硏究

姜英鎭,高德永 圓光大學校 1985 論文集 Vol.19 No.2

This paper presents a technique for optimizing the baseband pulse shapes in digital 2 binary code frequency modulated signals. The acquisition performance due to frequency offsets and steady - state tracking performance in the presence of noise and signal. The effect of the nonlinearity in the loop filter is approximated using a quasilinearization approach. The overall improvement in performance of a phaselocked loop with a nonlinear filter is evaluated and compared with a conventional PLL.

집적광학을 위한 격자 광결합기

姜英鎭,朴鍾旭 圓光大學校 1990 論文集 Vol.24 No.2

레이져 빔을 박막 도파로에 결합시키는 방법중, 격자결합기가 프리즘결합기보다 집적광학의 평면개념에 더욱 적합하고, 영구적으로 완벽하게 광소자의 일부분이 될 수 있으므로 가장 만족스러운 결합방법이다. 본 논문에서는 격자 광결합기에 있어서, 결합 모우드 이론을 이용하여 비선형 매질로 이루어지는 격자 광결합기에 대한 결합 방정식을 유도하고 서로 다른 입사전력 레벨에 있어서 여러가지 파라메타들의 효과를 결합효율면에서 수치해석을 하였다. 결과적으로, 도파로가 비선형성을 갖는 경우에는, 입사빔의 빔폭, 입사빔의입사각, 격자 주기의 최적값은 입사전력에 의존하며, 입사전력이 증가함에 따라 결합효율은 감소함을 보였다. Of the various means for coupling a laser beam into awaveguide mode, only the grating optical coupler is compatible with the planner concept of the integrated optics, and can be permanent part of a optical device, and hance offers the most satisfactory means of coupling. From the coupled mode theory, the coupling equation for the nonlinear grating coupler is induced in this paper. By the numerical analysis, the effect of various parameters on the coupling efficiency of a nonlinear grating coupler at different incident power levels is studies. As the result, the beam width of incident beam, incident angle of beam and optinum value of grating period are dependent incident power. It is reported that, in the presence of nonlinearities in the waveguide, the coupling efficiency decreases with increasing incident power.

Eysenck의 성격차원과 수면특성의 관계

이형영,국승희,윤진상,신일선 大韓神經精神醫學會 1999 신경정신의학 Vol.38 No.5

연구목적 : 수면은 생리적 현상이므로 이를 성격과 관련짓기 위해서는 생물학적 이론에 기초한 성격평가도구의 선택이 바람직하다. 따라서 본 연구는 생물학적 성격차원이론을 체계화한 Eysenck의 성격차원과 수면특성의 관계를 알아보고자 하였다. 방 법 : 종합대학교 남녀학생 532명을 대상으로 주중 수면습관과 수면장애를 묻는 설문지, Eysenck의 성격차원 검사를 실시하여 509명의 자료를 얻었다. 네가지 성격차원(정신병적 경향성, 신경증적 경향성, 외향성, 허위성)점수, 주중 수면습관과 수면장애의 기술 통계치를 산출하였으며, 이들 성격차원과 수면특성(주중 수면습관, 수면장애)의 관계를 알아보기 위해 Pearson의 적률상관을 산출하였다. 결 과 : 연구대상자의 네가지 성격차원 점수와 주중 수면습관은 정상범위였고, 가장 빈도가 높은 수면장애는 입면의 어려움이었으며, 가장 빈도가 낮은 수면장애는 몽유였다. 정신병적 경향성과 주중 취침시각, 기상시각, 수면잠복기, 깨는 빈도, 수면의 규칙성, 낮잠과 깜박잠의 빈도와 지속시간 및 입면의 어려움을 포함한 수면장애는 정적 상관이 있었고, 수면의 질, 일주기 리듬의 점수는 유의미한 부적 상관이 있었다. 신경증적 경향성과 수면습관 및 수면장애의 관계도 이와 유사하였다. 외향성은 수면의 질 및 일주기 리듬의 점수와 정적 상관이 있었으나 수면장애와는 관계가 없었다. 허위성은 일주기 리듬의 점수와 정적 상관이 있었으며, 수면잠복기, 수면의 규칙성, 낮잠과 깜박잠의 빈도 및 지속시간, 수면장애와 부적 상관이 있었다. 결 론 : 정신병적 경향성과 신경증적 경향성이 높을수록 수면습관이 더 좋지 않았고, 수면장애의 빈도가 높았다. 외향성이 높을수록 수면의 질이 좋았고, 아침형에 근접하였다. 허위성이 높을수록 아침형에 근접하고, 수면이 더 규칙적이었으며, 주간의 졸음이 적었고, 수면장애의 종류 및 빈도가 적었다. 이러한 결과는 Eysenck의 성격차원과 수면특성이 밀접한 관련이 있음을 시사한다. Objectives : In order to evaluate the possible relationship between sleep and personality characteristics, it is desirable to adopt the personality theory with biological basis because sleep is a physiological phenomenon. The purpose of this study was to investigate their possible relationship using the personality dimensions of Eysenck, which is well known as a biological personality theory. Methods : Sleep Questionnaires regarding the weekday sleep habits and the sleep disorders and Eysenck's Personality Questionnaire were administered to 532 university students. Data analysis was based on 509 students who gave reliable information. Firstly, the descriptive statistics of the scores on four personality dimensions(psychoticism, neuroticism, extraversion, lie) and sleep characteristics were obtained. Secondly, the possible relationships between each personality dimension and sleep characteristics(the weekday sleep habits and sleep disorders) were tested by calculating Pearson's product moment correlations. Results : The four personality dimensions' scores and weekday sleep habits of subjects were within a normal range. The highest frequency of sleep disorder was induction difficulty of sleep and the lowest was sleep walking. Psychoticism was positively correlated with bedtime, rise time, sleep latency, number of awakening, regularity of sleep, frequency and duration of nap and doze, frequency of sleep disorders, while negatively correlated with the quality of sleep, and the score of circadian rhythm. The correlations between neuroticism and sleep characteristics were similar to those of psychoticism. Extraversion was positively correlated with the quality of sleep and the score of circadian rhythm, while not correlated with sleep disorders. Lie was positively correlated with the score of circadian rhythm, but negatively correlated with sleep latency, regularity of sleep, frequency and duration of nap and doze, and sleep disorders. Conclusions : The higher psychoticism and neuroticism, the poorer sleep habits and the higher frequency of sleep disorders. The higher extraversion, the better quality of sleep and the closer morningness. The higher lie, the closer morningness, the more regularity of sleep, the less sleepiness of daytime, and the less frequency of sleep disorders. These findings suggest that there exist the close relationships between Eysenck's personality dimensions and sleep characteristics.

이중액막에 의한 우라늄(VI)연속추출의 해석

현영진 濟州大學校 産業技術硏究所 1995 산업기술연구소논문집 Vol.6 No.-

The uranium(V1) extraction in the continuous vessel was carried out with the flow rates of continuous and organic phase. The initial concentration of uranium(VI) in the external aqueous phase was 1,000 ppm. The mechanism of batch uranium(VI) extraction through the double liquid membrane mediated by DzEHPA was interpreted by the corrected Advanced Front Model. The continuous uranium(VI) extraction was analyzed by the extraction efficiency due to the above model. The times required for uranium(VI) extraction equilibria decreased with the increase of flow rates in the continuous phase under the constant flow rates in the organic emulsion phase. On the other hand, the times required for uranium(VI) extraction increased with the increase with the increase of flow rates in the organic emulsion phase under the constant flow rates in the continuous phase. Therefore the extent of uranium(VI) extraction decreased with the decrease of the times required for the uranium(VI) extraction equilibria. The main operating variable to increase the uranium(VI) extraction efficiency was proved to be the flow rates of continuous phase. The prediction of the optimum operating conditions for the increase of uranium(VI) extraction satisfied with the decrease of the times required for the uranium(VI) extraction equilibria was necessary for this experiment.