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      • KCI등재

        BCD 공정기반의 고속 EEPROM IP 설계

        김일준(RiJun Jin),박헌(Heon Park),하판봉(Pan-Bong Ha),김영희(Young-Hee Kim) 한국정보전자통신기술학회 2017 한국정보전자통신기술학회논문지 Vol.10 No.5

        본 논문에서는 읽기 모드에서 BL (Bit Line)의 전압을 DL (Data Line)에 전달하는 시간을 줄이기 위해 기생하는 커패시턴스가 큰 distributed DB 센싱 방식 대신 기생하는 커패시턴스가 작은 local DL 센싱 방식을 제안하였다. 그리고 읽기 모드에서 NMOS 스위치를 빠르게 ON 시키는 BL 스위치 회로를 제안하였다. 또한 BL 노드 전압을 VDD-VT로 선 충전하는 대신 DL 클램핑 회로를 사용하여 0.6V로 클램핑 하고 차동증폭기를 사용하므로 읽기 모드에서 access 시간을 35.63ns로 40ns를 만족시켰다. 0.13㎛ BCD 공정을 기반으로 설계된 512Kb EEPROM IP의 레이아웃면적은 923.4㎛ × 1150.96㎛(=1.063㎟)이다. In this paper, a local DL (Data Line) sensing method with smaller parasitic capacitance replacing the previous distributed DB sensing method with large parasitic capacitance is proposed to reduce the time to transfer BL (Bit Line) voltage to DL in the read mode. A new BL switching circuit turning on NMOS switches faster is also proposed. Furthermore, the access time is reduced to 35.63ns from 40ns in the read mode and thus meets the requirement since BL node voltage is clamped at 0.6V by a DL clamping circuit instead of precharging the node to VDD-VT and a differential amplifier are used. The layout size of the designed 512Kb EEPROM memory IP based on a 0.13㎛ BCD is 923.4㎛ × 1150.96㎛ (=1.063㎟).

      • KCI우수등재

        반응표면분석법을 이용한 난황에서의 콜레스테롤 분리를 위한 Aqueous Extraction 조건확립

        김일준(I . J . Kim),김영호(Y . H . Kim),이성욱(S . W . Lee),이무하(M . Lee) 한국축산학회 1996 한국축산학회지 Vol.38 No.3

        A response surface method with three reaction variables(pH, NaCl and temperature) was used to establish the optimum conditions for the aqueous extraction of cholesterol from egg yolk. Egg yolk was mixed with various NaCl solutions(concentrations, 0∼20%) in a ratio of 1 : 1.5(v/v), adjusted to various pHs(pH 4∼8) and then incubated for 5 minutes in a water bath at different temperatures (20∼60℃) with stirring. The egg yolk treated as above was centrifuged with 35,000 rpm at 15℃ for 4 hours to produce 4 fractions, from which the gel-type oil fraction and oil fraction, containing most of the egg yolk lipid, were analyzed for lipid, cholesterol and protein. From the response surface method, the optimum conditions for lipid separation was pH 6.60, 18.9% NaCl and temperature of 37.5℃ with the predicted yields of 79.9% lipid and 77.7% cholesterol. However, actual aqueous extraction under the optimum conditions resulted in lower separation with 71.88% lipid and 69.6% cholesterol than the theoretical values. Under the optimum conditions, the effects of egg yolk dilution ratio, centrifugation speed, centrifugation temperature, the addition of EDTA or stirring time on the cholesterol separation of the geltype oil fraction and oil fraction were investigated. The dilution ratio of 1:4, 45,000 rpm of centrifugation speed, and 25℃ centrifugation temperature were chosen as optimum conditions considering not only cholesterol but also protein fraction yield. The addition of EDTA or stirring time did not have any significant effect on the cholesterol separation.

      • KCI우수등재

        Aqueous Extraction 공정을 이용한 난황에서의 콜레스테롤 분리

        김일준(I . J . Kim),김영호(Y . H . Kim),김동훈(D . H . Kim),이무하(M . Lee) 한국축산학회 1996 한국축산학회지 Vol.38 No.5

        The effect of the addition of com oil(10%, 20%, 30%, 40% and 50% of egg yolk weight) and bile salts(2.5%, 5%, 7.5%, 10%, 12.5% and 15% of egg yolk weight) on the separation of cholesterol from egg yolk was studied. The optimum aqucous extraction conditions used for the separation were obtained by the Response Surface method and included : the egg yolk dilution ratio of 1.5, 18.9% NaCl, pH of 6.6, temperature of 37.5℃. centrifugation speed of 35,000 rpm and centrifugation temperature of 15℃. When com oil was added up to 30%, the amount of Gel-type (G) and Oil (O) fractions decreased while the Aqueous (A) and Protein (P) fractions increased. This resulted in cholesterol separating into the A+P fractions rather than the G+O fractions. The formation of precipitate increased from the 5% level of bile salts. The decrease in the amount of cholesterol separated into the G+O fractions corresponded with the increase in precipitate. Therefore, com oil and bile salt did not seem to have a significant effect on the aqueous extraction of cholesterol from egg yolks. Under the same conditions the effect of protease was studied, showing that pH of 5.0, reaction temperature of 37.5℃, reaction time of 120 minutes and 50 U of enzyme/g egg yolk were the best for lipid separation. Considering these results along with previous reports, the following conditions were chosen for cholesterol separation from the egg yolk egg yolk dilution ratio of 4.0, pH of 5.0, 18.9% NaCl, reaction temperature of 37.5℃, reaction time of 120 minutes, 50 U enzyme/g of egg yolk, centrifugation speed of 45,000 rpm and temperature of 35℃. Ninety-seven percent of the cholesterol in the egg yolk was separated into the Gel-type oil fraction.

      • KCI등재

        일부지역주민의 구강보건인식도 및 치과의료 이용양상

        김일준,남철현 韓國保健敎育學會 1993 보건교육건강증진학회지 Vol.10 No.1

        This study was done for the improvement of dental health of rural villagers and the dental health education, through finding of the types of brushing teeth and dental treatment of 812 people in Sunsan, Kyungpook province for 35days from March 27 to April 30 in 1992. Summaries are as follows ; 1. 58.5 percent of respondents were women, 56.3 percent were 40's, 28.0 percent were 30's, 12.3 percent were 50's, and the over 60's were 3.4 percent. Elementary school gaduates were 36.1 percent and most of them were middle school graduates, 33.5percent. In view of the occupation, famers were 56.5 percent, factory workers were 17.9 percent, the middle class(monthly pay amounting to 500,000∼990,000 won) were 49 percent and the lower class(less than 500,000 won) were 30.9 percent. In the standpoint of religion, Buddhists were 42.5 percent. 2. In the number and times of respondents brushing, 35.5 percent is “after dinner ”, 25.6 percent is “Before going to bed”, 15.8 percent is “After breakfast”, 13.3 percent is “ After every meal”, 5.2 percent is “Before breakfast” and 4.7 percent is “The sometimes it occurs to them”. 3. The acquirement process of knowledge on the dental health were clinics or health center dentists (25.6%), TV(24.5%), magazine(9.2%), school(7.8%), relatives(5.3%), and 25.6 percent has never acquired. 28.3 percent of the farmers leamed something by clinics and 28.1 percent of them haven't heard about dental health. 4. The rate of persons who experienced oral diseases during 1 year period was 76.1 percent, and that of the educated was 19.9 percent and that of the uneducated 80.1 percent. The authorities concemed with treatment were dentist's(41.6%), health center(30.3%), and the unlicensed person(2.9%).The rate of negligence was 6.3 percent, farmers experien-ced oral disease was 75.2 percent and they utilized the health center most often(36.2%). 5. The rate of person who had experienced dental prosthesis during ten year period was 71.9 percent, and the final place or man for dental prosthesis was dental clinic(59.4%),the unlicensed person(27.1%),and health center(13.5%). The rate of farmers experienced dental prosthesis was 70.4 percent. They utilized the dental clinic, the unlicensed person and the health center with the rates of 51.5 percent, 32.2 percent, and 16.7 percent respectively. 6. As to the results of dental prosthesis using the dental clinic, “being satisifed now” was 72.4 percent, “being dissatisfied” 14.4 percent, “being unable to use it” 3.1 percent, “its being somewhat usable” 10.1 percent, “having some problem” 38.7 percent, and “there being no problems” 61.3 percent. About utilizing the unlicensed person, “b1eing satisfied now” was 65.8 percent, “being dissatisfied” was 10.7 percent, “being unable to use it” 5.1 percent and “its being some what usable” was 18.4 percent. 7. The rate of missing teeth holders amounted to 89.8 percent, the rate of the educated to the uneducated was 19.2 percent to 80.8 percent. The reasons of neglecting that illness were due to "Endurable”(28.3%), and “No money”(24.3%). In the case of farmers 89.1 percent of them were the missing-teeth holders, the “Endurable”were 29.87percent, and “No money”lay in 27.4 percent. 8. Their hopeful centers for dental prosthesis were the dental clinics(76.6%), and the health center(16.9%).

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