• Proceedings of the KGS Conference
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• 2002.11a
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• pp.9-18
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• 2002

I. Trend of the Association of Japanese Geographers in 1970-1980. II. Reformation of the Association of Japanese Geographers Since 1980. III. Changing Era Revolution of Universities. IV. Geographical Education in the Association of Japanese Geographers. V. Overseas field WOrs in the Association of Japanese Geographers. VI. Recently Trend of Korean Study in the Field of Climatology and Environmental Geography in the Association of Japanese Geographers.

• 전기의세계
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• v.46 no.5
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• pp.19-27
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• 1997

본 논문은 제 2장에서 실시간 시스템의 기본 특성에 대해 보다 자세하게 살펴본 후, 제 3장에서 플랜트의 동적 특성을 관련 제어이론을 활용하여 실시간 시스템의 가장 중요한 정보인 작업 데드라인을 유도하는 방법을 살펴본다. 제 4장에서는 효율적인 실시간 제어 컴퓨터를 설계 및 평가하기 위해 실시간 시스템 분야에서 수행되는 연구동향으로 다음과 같은 세부 분야를, i) 스케줄링, ii)실시간 컴퓨터 언어, iii)실시간 운영체계(O/S), iv)실시간 동기화, v) 실시간 H/W 구조(architecture), vi) 실시간 통신, vii) 고장허용기법(fault-tolerance)에 대해 설명하고, 마지막 장에서 향후의 관련 연구 과제들에 대해 간단한 소개로 결론짓는다.

• The Bulletin of The Korean Astronomical Society
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• v.36 no.2
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• pp.148.2-148.2
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• 2011

Many symbiotic stars exhibit features formed through Raman scattering with hydrogent atom, which can be useful in probing the mass loss and mass transfer processes. These include Raman scattered O VI 6830, 7088, Raman scattered He II 6545, 4850, 4332, and broad wings around Balmer emission lines. In this study we investigate the basic properties of broad Balmer wings formed through Raman scattering using a Monte Carlo technique. Special attention is made on the symmetry of the wings which is expected to be broken due to asymmetric scattering cross section. In this poster, we show preliminary results.

• Nuclear Engineering and Technology
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• v.41 no.4
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• pp.381-390
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• 2009

This article provides selects of outstanding problems in computational neutron transport, with some suggested approaches thereto, as follows: i) ray effect in discrete ordinates method, ii) diffusion synthetic acceleration in strongly heterogeneous problems, iii) method of characteristics extension to three-dimensional geometry, iv) fission source and $k_{eff}$ convergence in Monte Carlo, v) depletion in Monte Carlo, vi) nuclear data evaluation, and vii) uncertainty estimation, including covariance data.

• YAKHAK HOEJI
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• v.40 no.5
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• pp.513-521
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• 1996

The polymorphism of piroxicam was studied. Form I, II, III and monohydrate designated as Form IX were prepared by recrystallization from different solvents. Depending on the coo ling rate of the piroxicam melt, Form IV, V, VI, VII and VIII were prepared. The crystal forms were characterized by DTA, TGA and UV spectroscopy. Their dissolution patterns were also investigated. During storage at ambient condition. Form VIII was transformed into Form I and it was accelerated by milling. The other crystal forms were also transformed into Form I by milling. Form I and Form IX were very stable.

• Journal of the Korean Statistical Society
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• v.10
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• pp.24-29
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• 1981

경제통계는 넓게 볼 수도 있고 좁게 볼 수도 있다. 그러나 여기서는 상식의 선에 따라서 일단 다음의 것들들 포괄하는 것으로 그것을 해석하기로 한다. 즉 여기서 말하는 경제통계는 (i) 국민소득 (ii) 기타의 사회회계(산업연관, 자금순환, 국제수지, 국부) (iii) 인구, 주택, 고용 (iv) 농림수산 (v) 철강 (vi) 전기 및 에너지 (vii) 건설 (viii) 운륜, 통신 (ix) 도소매 (x) 금융, 보험, 증권 (xi) 재정 (xii) 무역, 외환, 경제협력 (xiii) 물가, 자금, 생산성 (xiv) 소비 및 저축, 가계 (xv) 중소기업 (xvi) 기업경영 (xvii) 기타 (경기예측 등)를 의미한다.

• Journal of Sensor Science and Technology
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• v.32 no.6
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• pp.391-402
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• 2023

Low-dimensional (zero-dimensional (0-dim), 2-dimensional (2-dim)) nanoparticles, such as chalcogenide compound semiconductors, III-V semiconductors, transition metal dichalcogenides (TMDs), II-VI semiconductors, nanocarbons, hybrid quantum dots (QDs), and perovskite QDs (PQDs), for which blue light emission has been observed, are reviewed. Current synthesis and device fabrication technologies as well as their prospective applications on next-generation quantum-dot-based light-emitting diodes are discussed.

• Journal of Korean Society of Water and Wastewater
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• v.19 no.1
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• pp.53-60
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• 2005

Ferrous cement hydrates made from hydrating Portland cement doped with Fe (II) were reported to reductively dechlorinate chlorinated organics and to reduce Cr (VI) to Cr (III). In this study, kinetics of nitrate removal by ferrous cement hydrates were investigated. Nitrate removal kinetics were characterized by experimental variables such as cement hydration, amount of cement addition, Fe (II) dose, pH, and byproducts. As a result, hydrated cement showed better performances than non-hydrated cement due to the formation of LDH (layered double hydroxide). Doping of Fe (II) into the cement was found to improve removal efficiency at high pHs by association with Fe (II) sorbed on cement hydrates as a reactive reductant. Reduction of nitrate produced ammonium as a major product, which accounted for 63.5% of the final products, and nitrite (0.15%) as a minor product. These results indicate that the developed media are effective as sorbent/reducing agents in the nitrate removal and the reaction mechanisms of nitrate removal are sorption and reduction.

• Bulletin of the Korean Chemical Society
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• v.25 no.1
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• pp.79-84
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• 2004

The existing technological schemes for processing rhenium-containing raw materials involve the recovery of Re from solutions, which can be effectively achieved by anion exchange method. The application of anion exchange also allows to study rhenium state in aqueous solutions and to develop analytical control methods. The present work is focused on investigation of ion exchange equilibrium in the analytical system Re(VII)-HCl-$SnCl_2$-KSCN-anion exchanger by means of sorption-desorption method as well as by electron, IR- and diffuse reflection spectroscopy. It was shown that rhenium can be quantitatively recovered from this system. It is proposed to use the sorption-spectroscopic method for Re(VII) determination in aqueous solutions. The calibration curve is linear in the concentration range of 0.5-20.0 mg/L (sample volume is 25.0 mL) and the detection limit is 0.05 mg/L. The presence of Mo(VI), Cu(II), Fe(II, III), Ni(II), Zn(II) as well as $K^+,\;Na^+$ do not hinder the solid-phase determination of rhenium. Rhenium (VII) determination by diffuse reflection spectroscopy was carried out in model solutions as well as in samples of river-derived water and in solutions obtained after the dissolution of spent catalysts.

• YAKHAK HOEJI
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• v.30 no.5
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• pp.203-207
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• 1986

2-Aminobenzamide reacts with not only keton radical but also carbonyl group in carboxylic acid, to form easily -N-C-N-novel ring cyclization as a result I and V. In addition, it reacts with 1, 2-cyclohexadione or benzil, whitch are both 1, 2-diketone compounds, at the both ketone radical sites to give V or VII respectively. On the reaction with dimethone, however, which has 1, 3-diketone radical, it reacted with only one carbanyl group and VI was produced. We investigated the reaction with cr-ketoester such as ethyl pyruvate and diethyl rnesoxalate. In the reaction with ethylpyruvate, amine group in 2-aminobenzamide reacted not with ketone radical but carbonyl group in ester (product VIII). On the other hand, diethyl measoxalate reacted at the ketone radical site rather than the ester site (product IX).