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        • KCI등재

          비등수형 원자로 발전소에의 레이저 피닝 적용기술

          김종도(Jong-Do Kim),유지 사노(Yuji SANO) 대한용접·접합학회 2016 대한용접·접합학회지 Vol.34 No.5

          Toshiba has developed a laser peening system for PWRs(pressurized water reactors) as well after the one for BWRs(boiling water reactors), and applied it for BMI(bottom-mounted instrumentation) nozzles, core deluge line nozzles and primary water inlet nozzles of Ikata Unit 1 and 2 of Shikoku Electric Power Company since 2004, which are Japanese operating PWR power plants. Laser pulses were delivered through twin optical fibers and irradiated on two portions in parallel to reduce operation time. For BMI nozzles, we developed a tiny irradiation head for small tubes and we peened the inner surface around J-groove welds after laser ultrasonic testing (LUT) as the remote inspection, and we peened the outer surface and the weld for Ikata Unit 2 supplementary. For core deluge line nozzles and primary water inlet nozzles, we peened the inner surface of the dissimilar metal welding, which is of nickel base alloy, joining a safe end and a low alloy metal nozzle. In this paper, the development and the actual application of the laser peening system for PWR power plants will be described.

        • KCI등재후보

          6 MV X-선 빔의 등가에너지 결정

          종언(Jong-Eon Kim),박병도(Byung-Do Park) 한국방사선학회 2016 한국방사선학회 논문지 Vol.10 No.8

          '스콜라' 이용 시 소속기관이 구독 중이 아닌 경우, 오후 4시부터 익일 오전 7시까지 원문보기가 가능합니다.

          본 연구의 목적은 실험으로 6 MV X-선 빔의 등가에너지를 결정하는 데 있다. 6 MV X-선 빔에 대한 납 의 반가층은 전리함을 사용하여 측정하였다. 선감쇠계수는 측정된 반가층을 사용하여 계산하였다. 그리고 질량감쇠계수는 납의 밀도로 선감쇠계수를 나누어 얻었다. 얻어진 질량감쇠계수의 등가에너지는 미국표준 기술연구소에서 주어진 납의 광자에너지 대 질량감쇠계수 자료를 사용하여 결정하였다. 그 결과로서, 6 M V X-선 빔에 대한 등가에너지는 1.61 MeV로 결정되었다. 이 등가에너지는 Reft가 보고한 것 보다 약 30% 낮게 결정되었다. 그 원인은 납 감쇠기 사이의 공기공동의 존재에 기인한 것으로 추정된다. The purpose of this study is to determine the equivalent energy of a 6MV X-ray beam in the experiment. The half-value layer (HVL) of lead for the 6 MV X-ray beam was measured using an ionization chamber. The linear attenuation coefficients were calculated with HVL. And, the mass attenuation coefficient was obtained by dividing the linear attenuation coefficient by the density of lead. The equivalent energy of mass attenuation coefficient was determined using the photon energy versus mass attenuation coefficient data of lead given by National Institute of Standards and Technology (NIST). In conclusion, the equivalent energy of the 6 MV X-ray beam was determined to be 1.61 MeV. This equivalent energy was determined to be about 30% lower than reported by Reft. The reason is presumed to be due to the presence of an air cavity between the lead attenuators.

        • KCI등재

          순 티타늄 박판의 파이버 레이저 용접시 결함 억제를 위한 연속의 출력 파형제어 특성(Ⅱ)

          김종도(Jong-Do Kim),지성(Ji-Sung Kim) 대한용접·접합학회 2016 대한용접·접합학회지 Vol.34 No.6

          Because the pure titanium has superior corrosion resistance and formability compared with different material, it is widely used as material of welded heat exchanger. When the welding of heat exchanger is carried out, certain area in which welding start and end are overlapped occurs. The humping of back bead is formed in the overlap area due to partial penetration. Thus in this study, the experiments were carried out by changing the length and wave shape of overlap area, and then the weldabiliay was evaluated through the observation of microstructure, the measurement of hardness and tensile-shear strength test in the overlap area. When overlap length was 9.8mm, humping bead was suppressed. The microstructure of overlap area coarsened and its hardness increased due to remelting. As a result of tensile-shear strength test in the overlap area according to applying the wave shape control, it was confirmed that the overlap area applied wave shape control had more excellent yield strength and ductility.

        • 충북지역 초등학교 다목적교실 활용 실태 연구

          김종도(Kim, Jong-Do),이덕희(Lee, Duck-Hee),이근희(Lee, Keun-Hee),기수(Kim, Gi-Soo) 대한건축학회 2017 대한건축학회 학술발표대회 논문집 Vol.37 No.1

          Most schools carried out athletic activities and various educational activities on the play ground without a multi-purpose classroom. Since 2000, the importance of a multi-purpose classroom as a teaching and learning space has been recognized in addition to the lifelong learning space of local residents. As a result, special grants are being implement in response to the municipality"s response and and the multipurpose classrooms are installed and utilized use in all schools with exponential growth. In this study, we analyze the precedent research, draw out the problems, analyze the utilizarion status, and grasp the appropriate scale according to the class and the number of students to improve the efficiency.

        • KCI등재

          근대 이전 마드라사(Madrasa) 연구:

          김종도(Kim Jong Do),박현도(Park Hyon do) 한국아랍어아랍문학회 2017 아랍어와 아랍문학 Vol.21 No.2

          '스콜라' 이용 시 소속기관이 구독 중이 아닌 경우, 오후 4시부터 익일 오전 7시까지 원문보기가 가능합니다.

          This paper aims to discuss the development and role of the madrasa in the pre-modern Muslim world, in the hope that this will fill the vacuum of research on the madrasa in Korea. For the past 30 years, Korean scholars have only produced works on the madrasas in the modern Muslim world, without making any attempt to ponder changes made in the educational institutions between pre-modern and modern times. This paper endeavors to trace the development of the madrasa, highlighting its role in the pre-modern Muslim world, and discussing significant transformations the institution has gone through.

        • KCI등재

          영상도식변형 연구

          김종도(Kim Jong do) 현대문법학회 1998 현대문법연구 Vol.12 No.-

          '스콜라' 이용 시 소속기관이 구독 중이 아닌 경우, 오후 4시부터 익일 오전 7시까지 원문보기가 가능합니다.

          This paper is designed to show an appropriate way to analyse polysemie phenomena by taking a process morpheme. -er as an example. And it emphnsises that their appropriate analysis could be achieved when it is based on the schemathic network categorization model. The model is thought to be able to avoid the problems posed by the traditional categorization and the prototype model. -er is thought to have there contextual meanings: agent, instrument and setting. These meanings can be connected through image-schema transformations. Three schemas which represent their respective meanings can be united through the superschema. On the other hand, the present tense is thought to be polysemous. But its polysemy is caused by transformations applied on another grammatical category aspect. In this point the present tense is not polysemous. This paper also shows that image-schma transformations work on all the grammatical levels, for they are not the superficial grammatical gimmics, but mental activities. Thus all the grammatical phenomena should be analysed ultimately on the base of cognitive activities.

        • KCI등재
        • SCOPUSKCI등재

          ZnS:Cu,Cl 형광체의 특성에 미치는 원자층 증착 초박막 HfO<sub>2</sub>의 영향

          민완,한상도,형수,혁종,휴석,석환,이상우,최병호,Kim, Min-Wan,Han, Sand-Do,Kim, Hyung-Su,Kim, Hyug-Jong,Kim, Hyu-Suk,Kim, Suk-Whan,Lee, Sang-Woo,Choi, Byung-Ho 한국재료학회 2006 한국재료학회지 Vol.16 No.4

          An investigation is reported on the coating of ZnS:Cu,Cl phosphors by $HfO_2$ using atomic layer deposition method. Hafnium oxide films were prepared at the chamber temperature of $280^{\circ}C$ using $Hf[N(CH_3)_2]_4\;and\;O_2$ as precursors and reactant gas, respectively. XPS and ICP-MS analysis showed the surface composition of coated phosphor powder was hafnium oxide. In FE-SEM analysis, the surface morphology of uncoated phosphors became smoother and clearer as the number of ALD cycle increased from 900 to 1800. The photoluminescence intensity for coated phosphors showed $7.3{\sim}13.4%$ higher than that of uncoated. The effect means that the reactive surface is uniformly coated with stable hafnium oxide to reduce the dead surface layer without change of bulk properties and also its absorptance is almost negligible due to ultrathin(nano-scaled) films. The growth rate is about $1.1{\AA}/cycle$.

        • KCI등재

          입상활성탄 공정의 효율적 운영을 위한 입상활성탄 재생횟수별 수처리 효율 평가

          상구(Sang-Goo Kim),손희종(Hee-Jong Son),황영도(Young-Do Hwang),염훈식(Hoon-Sik Yoom),박홍기(Hong-Ki Park) 대한환경공학회 2018 대한환경공학회지 Vol.40 No.4

          본 연구는 2011년부터 2016년까지 재생탄들의 재생횟수 증가가 수중의 DOC와 THMs 흡착 효율에 미치는 영향을 평가하기 위해 수행되었다. 재생횟수가 증가할수록 재생탄들의 겉보기 밀도, 경도 및 요오드가는 감소시켰고, 회분은 증가하였다. 신탄은 평균 8개월 정도 운전하면 DOC (C/C0 = 0.8)가 파과에 도달하였고, 한 지당 평균 4,246 kg의 DOC를 흡착하였다. 재생횟수에 관계없이 재생탄들도 운전 7개월~10개월 후에 DOC가 파과에 도달하였으며, 한 지당 평균 3,514 kg~4,656 kg의 범위로 DOC를 흡착하여 재생횟수가 증가하여도 DOC 흡착능은 신탄과 유사하였다. THMs의 경우, 신탄은 평균 7개월 정도 운전으로 파과에 도달(C/C0 = 1.0)하였고, 한 지당 평균 60.6 kg을 흡착하였다. 재생횟수가 1차, 2차 및 그 이상 증가할수록 THMs 평균 파과도달 기간이 평균 4개월, 2개월 및 1개월 정도로 감소하였으며, 한 지당 평균 흡착량도 재생횟수가 1차, 2차 및 그 이상 증가할수록 한 지당 평균 44.8 kg, 21.6 kg 및 10.8 kg으로 감소하였다. 6차 재생탄의 DOC 흡착능이 신탄과 비슷하여 DOC를 위한 적절한 재생 차수를 결정하기 어려웠으나, THMs의 흡착능의 경우, 2차 재생탄이 신탄의 1/3, 4차 이상의 재생탄은 신탄의 1/6로 감소하여 재생횟수가 증가함에 따라 DOC의 흡착효율은 유지되는 반면 THMs의 흡착효율은 빠르게 저하되는 것으로 나타났다. This study was conducted to evaluate the effect of increasing the number of regenerated granular activated carbon (GAC) on the adsorption efficiency of DOC and THMs from 2011 to 2016. As increase the number of regeneration times, the apparent density, hardness and I2 number were decreased, and the ash was increased. Average breakthrough period of virgin GAC for DOC (C/C0 = 0.8) was about 8 months and each GAC basin (300 ㎥) adsorbed about 4,246 kg of DOC. The regenerated GACs reached to breakthrough 7 to 10 months and these GACs have 3,514~4,656 kg/basin adsorption capacity. The average THMs breakthrough (C/C0 = 1.0) period of virgin GAC was about 7 months and each basin adsorbed 60.6 kg of THMs. 1<SUP>st</SUP> and 2<SUP>nd</SUP> and more regenerated GACs had 44.8 kg/basin, 21.6 kg/basin and 10.8 kg/basin adsorption capacity respectively. To determine the optimum regeneration times, 6<SUP>th</SUP> regenerated GAC has almost same degree of adsorbing DOC capacity of virgin GAC that means it is difficult to determine the appropriate regeneration times for DOC, on the other hands for THMs, 2<SUP>nd</SUP> regenerated GAC’s adsorption capacity has one thirds of virgin GAC of that and more 4<SUP>th</SUP> regenerated GAC has only one sixths of virgin of that, therefore, more two times of regenerated GAC needs to be considered for THMs removal.

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