느린 多價 Ar 이온 생산을 위한 새로운 장치 고안

박동수,이의완,이원식 慶北大學校 1985 論文集 Vol.39 No.-

New apparatus of producing highly charged slow Ar ions by bombarding Ar^4+ ions with a 42MeV and 10nA on the 10^-4 Torr. Ar target is designed. We have a complete discussion of the design considerations and the detailed testing of the apparatus. Single collision conditions are attained at a sufficiently low pressure where P_i becomes constant. Secondary Ar ion current of producing by collision between Ar^4+ ions with a 20MeV and 10nA and 10^-4 Torr Ar target is about 1.77×10 exp (-11) amperes.

신공공관리의 논리와 한계에 관한 고찰

이동수 계명대학교 사회과학연구소 2000 한국사회과학연구 Vol.19 No.2

세라믹 발전소자(열전소자)에 관한 연구

김대수,조통래 忠南大學校 産業技術硏究所 1992 산업기술연구논문집 Vol.7 No.1

Sintered β-FeSi₂has been employed as the thermoelectric devices to change the heat to electric power directiy. β-FeSi₂device was fabricated by sintering the mixture of Fe and Si powder at 1250℃. The thermoelestric properties of sintered FeSi₂with elemental substitution have been studied by the measurment of electric conductivity and Seebeak's coefficient. Substitution of Sb or In in β-FeSi₂did not show appreciable difference on the thermoelestric properties of sintered β-FeSi₂devices.

음운감수성이 읽기 능력의 발달에 미치는 영향에 관한 연구

나동진,조준수 全北大學校 敎育大學院 2002 敎育論叢 Vol.22 No.-

The purpose of the study was to investigate the relations of reading abilities to phonological sensitivity and the effects of phonological sensitivity training on the development of reading. It was hypothesized that, in the early childhood period, phonological sensitivity would be related to reading abilities and the training of phonological sensitivity would improve the reading abilities. Sixty kindergartners, average age of 66months, were participated in the experiment. A test of phonological sensitivity developed by the authors for the study was administered twice. before and after the experimental treatment. The subjects were provided with the training of phonological sensitivity for 6 weeks, 3 sessions a week, 30 minutes a session. The results confirmed the hypotheses of the relationship between phonological sensitivity and reading abilities and the effect of phonological sensitivity training on the reading abilities.

半導體 PbS 薄膜의 活性化硏究

朴東秀,孫基洙,李元植 慶北大學校 物理化學硏究所 1984 硏究論文集 Vol.5 No.-

Auger electron spectroscopy has been used in conjunction with argon ion sputtering in a study of the chemical structure of the surface, bulk and interface region between chemical deposited PbS and the glass substrate, thermally oxidated PbS and the glass substrate and thermally oxidated PbS and the SiO_2. All these PbS films were activated by means of oxidation in various conditions. In the result of the present study, we showed that our experiments are coincidence with theoretical mechanism "minority-carrier model" of photoconductivity of PbS film. The principal features in the Auger electron of a complex spectra from a SiO_2, carbide and graphite surface are presented. They occured when some of the electrons involved in this Auger process are valence electrons. It was found that these complex spectra serve as a fingerprint for the identification of the form of the carbon, oxygen at surfaces. We found the chemical structure of the surface, bulk and interface of a 1-2μ PbS chemical deposited on SiO_2 and simultaneous activation effect of SiO_2-PbS interface.

Preionization-Stabilized Multiple Transmission Lines TE N_2-Laser

朴東秀,金裕榮,金庚燦 慶北大學校 1980 論文集 Vol.29 No.-

Achieving high output power in N_2 laser, we used fast electric discharge (~10 nsec), large volume (~0.2 liter) and homogenized discharge. In order to perform the fast discharge, we have designed a lasing cavity driven by TE-type transmission lines and low inductance spark gap, and utilized multiple transmission lines to provide increased lasing volume. Multiple lines should effect on reducing the line impedance. We have derived the good homogeneity of laser discharge from the uniform spatial distribution of the initiating electrons provided by the preionizer. Present work enabled the stability of the main glow discharge relatively insensitive to the surface quality of the main electrodes.

每日 學習日誌 作成이 學習障碍兒의 學習戰略 使用, 動機的 信念, 그리고 學業成就에 미치는 效果

羅東晋,李在松,張澤洙 全北大學校 敎育大學院 1994 敎育論叢 Vol.14 No.-

Recent laboratory researchers have developed training programs and models of instruction to improve students' thinking skills in real-world instruction. These studies reflect the information-processing approaches to human thinking skills that focus on the differences between skilled and learning disabled learners in information-processing and have a great influence on the educational effort to diagnose and resolve the cognitive and motivational deficits of learning disabled learners. Based on these expectations, this study was attempted to find that the cognitive and motivational deficits of learning disabled learner could be remedied by keeping a Daily Learning Log. With this purpose, three specific hypotheses were formulated as follows: 1. The experimental group that keep a daily learning log would exhibit greater use in learning strategies(cognitive strategies and self-regulation) in the MSLQ test than would the control group that was given traditional instruction. 2. The experimental group that keep a daily learning log would exhibit enhancing motivational beliefs(self-efficacy and intrinsic motivation) than would the control group. 3. The experimental group that keep a daily learning log would exhibit greater academic performance in the three task test(social inquiry language foreign language)than would the control group. To solve these problems, an experimental treatment was carried out for about 4 months. Subjects were 32 first graders of a high school in a rural area of Chon-Buk. During 16 weeks, subjects in the experimental group studied 2 hours a week the learning strategies, motivation beleifs and keeping a daily learning log. The findings of this study were summarized as follows: 1. The expremental group exhibited greater use in learning strategies and self-regulation than did the control group, F(1, 29)=32. 19, p<0.001, F(1, 29)=47. 04, p<0.001. Accordingly, the Hypothesis 1 was accepted. 2. The experimental group that keep a daily learning log resulted in statistically significant enhancer motivational beliefs in self-eefficacy and intrinsic value than did the control group, F(1, 29)=52.14, p<0.001, F(1, 29)=14.36, p<0.001, consequently 2 accepted. 3. The experimental group that keep a daily learning log exhibited stattistically significant greater academic performance in two task(social inquiry domain, language domain) of the three task test(social inquiry domain, language domain, foreign language domain) than did the control group, F(1, 29)=36.21, p<0.001, F(1, 29)=22.96, P<0001, Accordingly, the hypothesis 3 was partially accepted. These results might suggest that the cognitive and motivational deficits of learning disabled learners could be modified by keeping a daily learning log.

固體粒子의 溶解에 關한 速度論的 考察

金大洙,趙統來 충남대학교 공업교육연구소 1986 論文集 Vol.8 No.3

Theoretical model was proposed to predict the rate of dissolution of spherical solid particles, initially non-porous. The model takes into an account mass transfer between the solid surface and the bulk fluid. The relationship between the fractional dissolution and time was determined basen on the kinetics of individual particles. For the uniform particle size, it is found that the fractional dissolution increases as both the particle size and particle density decreases.

金屬表面의 吸着特性에 關한 硏究 : 表面摩擦問題 Friction of Metals

朴東秀,李義完,朴準鐸 慶北大學校 1976 論文集 Vol.21 No.-

The coefficients of friction, μ of various metals(Au, Cu, Fe, Zn, brass, stainless-steel), including transition metals(Nb, Mo) and semiconductors(Si, InSb) were observed in air and in a vacuum, concerning with the surface adsorption and the physical properties of the materials. In this experiment most measurements were carried out for the surface covered with adsorbed oxide films and some for the poor clean surfaces. All the metal specimen were polycrystalline. Samples were prepared by means of dry-tool cut, mechanical polishing and smoothing, etching and cleaning. The relatively clean surfaces were obtained by heating in a vacuum of about 10^-5 torr. It was found that the presence of the adsorbed or combined gas films on the surface gave a reduction to the experimental values of μ compared with the values for clean surfaces of the same hardness. The values of μ were ranged from 0.4 to 0.9 for the contaminated surfaces, while 0.4 to nearly 1.2 for the clean surfaces. The roughness of contact surface and the load affected the values of μ for all materials, and μ was roughly proportional to the load. μ increased as the temperature of samples raised from the room tempertaure to about 350℃ for the relatively low melting point, while no change was observed for the samples of high melting point: namely, for those metals whose relaxation point lie slightly above room temperature, the coefficient of friction rose rapidly with rising temperature for those metals whose relaxation point lie above 350℃, μ remained independent of temperature. When specimens of two different metals are brought into contact, the softer surface must be deformed plastically by the harder surface. μ was independent of the hardness for the identical sample pairs. In the present study, the sliding process involved a junction-growth and a ploughing action, consequently the shearing and deformation. These two processes interact and it is shown that, if junction-growth is appreciable, tensile stress may develop in the trailing portion of the contact region.

쌀, 조, 수수 및 콩의 食餌가 흰쥐의 成長 및 血液性狀에 미치는 影響

한백수,주현규,사동민,박병순,박기웅 선문대학교 첨단과학기술연구소 1996 첨단과학기술연구소 논문집 Vol.1 No.1

쌀, 조 수수, 및 콩의 식이가 흰쥐의 성장 및 혈액 성상에 미치는 영향을 조사하기 위하여, 평균체중 180g의 Sprague-Dawley계 rat(♂) 각 5마리씩을 대조군(T_(0)), 쌀(T_(1)), 조(T_(2)), 수수(T_(3)), 콩(T_(4))급이군등 5개군으로 나누어 실온에서 6주간 사육하면서 사료섭취량, 급수량, 증체량과 6주후의 혈액상의 변화틀 조사하였다. 사료 섭취량은 대조군이 각 처리 실험군보다 높았으며 물의 급수량도 동일한 결과이었으며 그 순위는 쌀, 조, 콩, 수수 순으로 감소하였으며, 각 처리군의 증체량은 대조군 보다 낮았으며, 특히 수수는 초기보다 감소하였고, 각 처리군의 사료효율은 대조군보다 낮았으며 특히 수수처리군이 타 처리군보다 낮았다. 연액성상의 변희는 대조군에서는 큰 변화가 없으나 수수군에서 BUN, HOT지 다른군보다 높았으며 쌀의 처리군은 creatinine치가 높았고 조에서는 혈당치가 낮았으며, 콩에서는 LDH는 높았고, HGB, HCT, PI.T, RBC가 낮았고, 특히 콩 수수에서는 혈액상의 변화가 가장 컸으며 다른 실험군과 비교하였을 때 통계적인 유의성이 인정되었다. This study was conducted to investigate the effects of rice, millet, sorghum and soybean diet on the growth rate, daily intake feed ratio and change in hematology of male rats. The experimental male rats of 180g average weight were fed on control (T_(0)), rice (T_(1)), millet (T_(2)), sorghum (T_(3)) and soybean diet (T_(4)) for 6 weeks. The amount of daily feed and water intake supply in each diet group is higher than that of control group to as shown in the following order: rice, millet, soybean, sorghum. The growth ratio of each diet group is lower than that of control group. Especially, sorghum made each diet group reduce the weight even more than the initial weight. Control group is lower than each diet group in regard to the effective ratio of feed. Especially, the sorghum group is lower than other groups. Control group remained same in the change of hematology, however, sorghum group is higher than other groups for BUN, HCT. Rice group is higher in creatinine and millet group is lower in glucose content of serum than any other groups. Soybean group is higher in LDH but lower in HGB, HCT, PLT, RBC than control group. Especially, the soybean and sorghum groups showed a big change in hematology and had the statistic significance in comparison to other groups.