내구성을 고려한 표면피복재의 성능평가에 관한 실험적 연구

김영덕,조봉석,윤종기,김용로,장종호,김무한 대한건축학회 2003 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.23 No.2

It is recognized that reinforcement corrosion is the main distress behind the present concern regarding concrete durability. The basic method to prevent reinforcement corrosion is coating the reinforcement concrete with surface coating materials but evaluating their performance is necessary to the work satisfactory because they have different performance for each other. In this study. to evaluate performance of surface coating materials, we compare their properties in terms of sticking strength and permeability of carbonation, chloride ion and water with actual reinforcement corrosion under environment of complex deterioration. The results showed that an increase in age also decreases Carbonation velocity coefficients, increases Chloride ion diffusion coefficients and increases water absorption coefficients. As well, an increase in age also increases corrosion of reinforcement due to permeability of carbonation and chloride ion. And sticking strength of inorganic coating material is higher than organic coating material.

PVA-ECC를 활용한 Half PC 복합체의 역학적 특성에 관한 실험적 연구

김재환,김영덕,김갑수,조봉석,장종호,김무한 대한건축학회 2003 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.23 No.2

ECC represents one particular class of HPFRCC, which are defined by an ultimate strength higher than their first cracking strength and the formation of multiple cracking during the inelastic deformation process. This study is to provide the fundamental data for the development of hybrid construction method such as the half PC(Precast concrete) reinforced by PVA-ECC, the mechanical properties of half PC according to the alteration of properties of PVA-ECC in terms of the type of fiber, Vr, S/M, placing height of PVA-ECC, are experimentally investigated. As the results. it is found that the half PCs of PVA-ECC have very higher mechanical performance in terms of yield load, strain capacity beyond yield point and maximum flexural load than that of mortar. Also, flexural crack in the half PCs of PVA-ECC are not localized at first crack and are growed to many micro crack, especially multiple cracking in specimen of P(12)-30-0.1ㆍ3 occurred.

중증 허혈성 지체질환 환자에서 시행된 vascular endothelial growth factor의 혈관신생 유전자치료 1예

김현중,장신이,김종묵,김선영,김병문,김원배,김덕경 대한내과학회 2003 대한내과학회지 Vol.64 No.1

저자 등은 기존의 치료에 반응하지 않은 중증 허혈성 지체질환 환자를 대상으로 하여 vascular endothelial growth factor를 이용한 혈관신생 유전자 치료를 시행하였다. 치료 후 환자의 허혈에 의한 하지 통증이 현격하게 감소하고 상처의 진행이 측부혈관이 많이 증가됨이 관찰되어 이에 문헌고찰과 함께 보고하는 바이다. We report VEGF-induced angiogenic gene therapy in a patient with critical limb ischemia, who did not respond to conventional treatment. This patient was the first case in a dose-escalating series of phase I clinical trial. The patient had severe resting pain, gangrene and diffuse ulcer in his left foot. Total 1,000㎍ of naked DNA encoding human VEGF165 was administered intramuscularly to 8 sites of the loft lower extremity. Four weeks after the first 1,000㎛ was administered to the same sites (total dose: 2,000㎛). After gene therapy, resting pain gradually reduced and the amount of analgesics taken by the patient decreased. The ischemic wound of lower extremity slightly improved. However, there was no complete wound healing at 12 weeks of treatment. Digital subtraction angiography at 12 weeks after gene therapy showed an increase in collateral vessels at the mid-tibial, ankle and foot arch levels. Immediately and up to 12 weeks, there was no complication related to gene therapy. These findings may be cautiously interpreted to indicate that intramuscular injection of naked plasmid DNA of VEGF_165 may induce therapeutic angiogencsis in a patient with critical limb ischemia. Further clinical evaluation of VEGF-induced gene therapy is needed to evaluate the safety and efficiency of this treatment.(Korean J Med 64:85-90, 2003)

京畿道 廣州郡 및 富川郡에 있어서의 肺디스토마의 疫學的 調査

尹德鎭,金元撤,全世鍾,李俊鎬,金燉均,尹燾善,南相德 대한의학협회 1965 대한의학협회지 Vol.8 No.9

靜的筋力과 動的筋力에 對한 考察

金種悳 誠信女子大學校 1987 硏究論文集 Vol.25 No.-

Finding the best method of improving muscular strength has long been a problem among the sport scientists. Inthe past, most investigation into this problem, has been concerned with comparing a dynamic, concentric type of training with static methods. However, arecent study has experimented with a variation of the dynamic method involving forced eccentric contractions. The present study investigated the difference between static and dynamic strength. Sixty-six volunteer subjects from the Department of Physical Education at the Sung Sin Women's University were used. Measurements of height, weight, chest-circumference, grip-strength, bask-muscle strength, 80m dash, Sargent-jump test, were taken. The M(means) and S.D (standard deviation) of the above factors were calculated. Coefficient of corelation of the above factors was calculated according to the method of K.Person's Calculation of coefficient of corelation in each of them. t-test was taken about the result. in the lebel of significance. The conclusion as follow. ⅰ)Low corelation (r=.26 to .45) is found between height and static strength, but considerable corelation (r=.42 to .53) height and dynamic strength. ⅱ) Low corelation (r=.31 to .39) is found between weight and static strength, no corelation (r=.18 to -.11) weight and dynamic strength. ⅲ) Corelation between chest-circumference and grip-strength, was insignificant(r=.06 to .17). Chest- circumference and bask-muscle strength was moderate corelation(r=.64). Low correlation(r=.25) was found between chest-circumference and 80 m-dash, but chest-circumference and Sargent-jump was insignificant(r=-.32) ⅳ) Moderate corelation is found between grp-strength and bask-muscle strength(r=.21 to .52). 80m-dash and Sargent-jump was insgnificant(r=.15). ⅴ) Grip-strength and 80m-dash was insignificant(r=.17 to .23), but back-muscle strength and 80m-dash was moderate corelation(r=.49). ⅵ) According to the corelation between grip-strength, back-muscle strength, and Sargent-jump is insignificant(r=-.14 to -.18, -.45), dynamic strength is not determindid by static sterngth. ⅶ) It seems that Sargent-jump is determindid by the other components, for example, neuro-motor coordination or other physiological parametrs.

4,5-bis(hexanoyloxy)의 dodecame 合成 및 그 潤滑性

金鍾大,崔在煥,林得根 嶺南大學校附設 基礎科學硏究所 1985 基礎科學硏究 Vol.5 No.-

4,5-Bis(hexanoyloxy) dodecane was syntheisized from 4,5-dodecanediol which was obtained through continuous reaction steps starting from n-octyl alcohol. All the intermediates and final products were purified by way of distillation or crystallization, and confirmed by IR spectrophotometer and refractometer. Physical properties of the diester synthesized were also determined for the flowing point and solidifying point. It was observed that the flowing point of the diester was under-78℃, and it appeared that the diester synthesized is much more superior to the common mineral lubricant on the base of the solidifying temperature.

Hypertext를 이용한 교수-학습자료 개발 및 실행 방안에 관한 연구 : 고등학교 공통과학 (화학부문)을 중심으로 Based on High School Common Science (Department of Chemistry)

김성배,정덕영,박종환,김성홍,여수동 慶北大擧校 師範大學 科學敎育硏究所 2000 科學敎育硏究誌 Vol.24 No.-

The necessity of the internet-aided instruction, and the advantages and restrictions of it were widely investigated as theoretical background, and the general principle of designing the instruction, model of procedure in science class, practical design of the internet-aided instruction procedure of it's development and effective approach of web design. On the basis of the above, experiment contents of 10 units in highschool common science (department of chemistry)were reconstructed, and deployment plan for teaching-learning guidance papers for experiments, reports of experiments, individualized problem for evaluation, self-learning references, guidance papers for teaching, figure files for forming concepts and principles were made. Experimental unit of chemical reaction speed which is difficult for the first grade highschool students is established, and it is made a form of CD-ROM title with animation and presentation techniques. As a result, Learning environment which raised learner's motivation was presented. Further more, based on web instruction model and instruction design principle for learning with internet, teaching-learning home page with HTML was made.

Treadmill 운동부하시 비만중년 여성의 유산소능력, 심근산소소비 및 심전도 ST의 변화

김종덕,최건식,황수관 대한스포츠의학회 1994 대한스포츠의학회지 Vol.12 No.2

The purpose of this study was to examine changes in aerobic capacity, MV´O_2, and ST segment at electrocardiography during treadmill exercise. Forty-six obese women, ranged in age from 40s-50s yr, were divided into four groups; 1) Contorl group 1(N=10, body fat < 35%), 2) Cotrol group 2(N=12, 25 < body fat <30%), 3) obese group 1(N=11, 30% < body fat <35%), and 4) Obese group 2(N=13, 35% < body fat). The findings of this study were as follows. 1. Subjects with higher percent of body fat showed lower LBM and percent of body fluid. 2. Every group showed a significant increase in HR after one minute of exercise, and gradual increase in HR during the first 2 of 3minutes of exercise. Increase in heart rate of obese group 2 was higher that that of other groups during exercise. 3. The blood pressure of obese groups both at rest and during exercise was higher than that of control group. 4. There was no big difference in V´O_2 between four groups at rest and before 5 minutes of exercise. After 5 minutes of exercise, V´O_2 of obese group 2 increased significantly. Subjects who had higher percent of body fat showed lower V´O_2max. 5. There was no big difference in energy expenditure between four groups at rest of during 5 minutes exercise. After 5 minutes of exercise, energy expenditure was significantly increased in obese group 2. 6. The MV´O_2 of each groups after one minute of exercise increased twice or more than that of the same group at rest. The MV´O_2 of obese groups was larger than that of control groups. 7. The Regression equations between HR per minute and SBP, V´O_2 and MV´O_2 were obtained from the study. The Regression equations of HR per minute was significantly correlated to SBP, V´O_2, and MV´O_2. 8. The ST level of each group. during exercise, decreased approximately 50% of the same group at rest, while the ST slope increased approximately twice of three times of the same group at rest. The study found two interesting facts: firstly, LBM and body fluid were inversely proportional to percent of body fat. Furthermore, there was a small difference between control groups and obese group 1, while big difference existed between control groups and obese group 2. It is noted that BP, V´O_2, and MV´O_2. could be measured only from HR per minute using regression equations. Moreover, ST level decreases while ST slope increases.

고체상 에피택시에 의한 β-FeSi_2 박막의 에피택시 성장과 전자구조의 연구

김현덕,이종덕 진주산업대학교 2000 산업과학기술연구소보 Vol.- No.7

β-FeSi_2 was grown on a Si(100) substrate by thermally annealing using SPE from the sandwich structure. Fe(500Å)/Ti(SOÅ)/Si(100) sample. The peak for the β-FeSi_2(244) plane was observed at about 70.8˚ on the XRD spectrum and it was confirmed that the growth mode of Fe-silicide is β-FeSi_2(220)//Si(100) from HRTEM images. The electronic structures of the β-FeSi_2 thin film were investigated by AES and the Fe LMM Auger peaks of Fe-silicide were shifted toward higher energy with about 1∼3 eV with respect to those from bulk Fe. The each spectral terms of bulk Fe and β-FeSi_2 Auger peaks, which consisted of L_3M_23M_23, L_3M_23M_45 and L_3M_45M_45 Auger emissions, were deconvoluted in terms of L-S coupling. The plasmon energy loss peaks for the β-FeSi_2 were observed at about 20.8 and 19.0 eV lower than the principal Auger peaks, L_3M_23M_45 and L_3M_45M_45. The effective mass of the electron in β-FeSi_2 deduced from the plasmon energy loss was estimated to be about 0.4∼0.6 m_e.

산란계 사료첨가제로서 크릴분말의 효과

김종덕,장재익,유문일,정흥우,권찬호,오두식,김창현 한국국제농업개발학회 2004 韓國國際農業開發學會誌 Vol.16 No.1

본 시험은 크릴 분말의 사료적 특성을 조사하고, 산란계 사료에 첨가하였을 때 계란의 생산성과 품질을 비교하기 위하여 수해하였다. 크릴 분말을 산란계 사료에 0, 1 및 2% 수준으로 첨가하여 216수에 6주간 사양시험을 실시하였다. 크릴분말의 일반성분은 수분 8.25%, 조단백질 50.52%, 조지방 16.67%, 조회분 15.72%로 단백질과 지방이 높은 동물성 사료원료였다. 그리고 무기질(15.72%), astaxanthin (10ppm) 및 콜레스테롤 함량 (780ppm) 또한 많았다. 산란율, 연파란율, 일일사료섭취량 및 난중은 처리간에 유의적인 차이가 없었다. 황고 및 난황색도는 크릴의 첨가수준이 높을수록 유의적으로 높아 산란계의 난질을 향상시키는 첨가제로서의 가능성을 보였다. 이상의 결과를 볼 때 크릴 분말은 단백질과 지방이 높은 동물성 사료이며, 산란계에서 천연착색제로의 가능성을 보였다. This experiment was conducted to evaluate the chemical composition of Antarctic Krill(Euphausia superba Dana) meal as feed, and to investigate the effect of its supplementation on productivity and egg quality of laying hen. A total of 216 layers at the age 43 weeks in commercial cage were fed for 6 weeks with 3 different diets containing 0, 1, and 2% Krill meal (KM). The chemical composition of KM was consisted of moisture 8.25%, crude protein 50.52%, crude fat 16.67%, curde ash 15.72%, indicating that KM contains large amount of protein and fat. Krill meal also contains large amounts of mineral(15.72%), astaxanthin(10ppm) and cholesterol(780ppm). No differences were found in egg production, broken and soft eggs, and feed intake among treatments. Dietary supplementation of KM resulted in increased egg yolk height(6.1㎜) and yolk color (2) compared with those of control, suggesting that KM can be used as a feed additive for yolk quality improvement. According to the results of this study, Krill meal can be supplemented in laying hen diets as protein and fat sources, and natural coloring pigment.