• 한국작물학회지
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• 제39권3호
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• pp.216-222
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• 1994

제망 및 적엽에 의한 망과 엽위별 엽신의 생산효율을 검토하고자 특성이 상이한 올보리, 강보리 및 수원18호를 공시하여 시험을 수행하였던 바 그 결과를 요약하면 다음과 같다. 1. 천립중, 및 등숙률에 대한 망과 엽신의 역할은 품종간 차이가 인정되어 올보리와 강보리는 적엽보다 제망의 영향이 켰으나 수원18호는 엽의 역할이 더 컸다. 2. 엽신의 엽록소 및 질소함량도 품종간 차이가 있어 올보리에서 가장 높았으며 지속기간도 길었고 엽위별로는 상위엽일수록 높았다. 3. 엽위별 엽신의 질소함량보다 엽록소 함량의 차이가 더 컸으며 등숙이 진전됨에 따라 엽록소 함량의 일실속도가 질소 함량보다 빠르게 진행 되었다. 4. 동화기관별 종실중에 대한 기여도는 간과 엽초에서 79.2∼81.4%로 품종간 뚜렷한 차이가 없었으나 망은 올보리와 강보리가 11.6∼13.8%, 수원18호는 5.4%, 엽신은 각각 4.8∼8.1%, 15.4%로 망과 엽신에서는 품종간 차이가 인정되었다.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2007년도 추계학술대회 논문집
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• pp.126-127
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• 2007

Sn-filled and Fe-doped $CoSb_3$ skutterudites were synthesized by encapsulated induction melting. Single ${\delta}$-phase was successfully obtained by subsequent annealing and confirmed by X-ray diffraction analysis. Temperature dependences of Seebeck coefficient, electrical resistivity and thermal conductivity were examined from 300 K to 700 K. The positive Seebeck coefficient confirmed the p-type conduction. Electrical resistivity increased with increasing temperature, which shows that the $Sn_zCo_3FeSb_{12}$ skutterudite is highly degenerate. Thermal conductivity was reduced by Sn-filling because the filler atoms acted as phonon scattering centers in the skutterudite lattice. Thermoelectric figure of merit was enhanced by Sn filling and its optimum filling content was considered to be z=0.3 in the $Sn_zCo_3FeSb_{12}$ system.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2010년도 하계학술대회 논문집
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• pp.215-215
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• 2010

The feasibility of InSbTe (IST) chalcogenide materials prepared by metalorganic chemical vapor deposition (MOCVD) for phase-change memory (PRAM) applications was demonstrated. Films grown below $225^{\circ}C$ exhibited an amorphous structure, and the films grown at $300^{\circ}C$ Cincluded various crystalline phases such as In-Sb-Te, In-Sb, In-Te, and Sb-Te. The composition of the amorphous films grown at $225^{\circ}C$ was dependent on the working pressure. Films grown at $225^{\circ}C$ exhibited a smooth morphology with a root mean square(rms) roughness of less than 1nm, and the step-coverage of the films grown on a trench structure with an aspect ratio of 5:1 was greater than 90%. An increase in deposition time increased the filling rate, while retaining the conformal step-coverage. Films grown at $225^{\circ}C$ for 3h in a working pressure of $13{\times}10^2$ Pa exhibited a reproducible and complete filling in a trench structure.

• Nuclear Engineering and Technology
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• 제49권3호
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• pp.476-483
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• 2017

The decay heat that is produced by nuclear reactor spent fuel must be cooled in a spent fuel storage pool. A wickless heat pipe or a vertical two-phase closed thermosyphon (TPCT) is used to remove this decay heat. The objective of this research is to investigate the thermal performance of a prototype model for a large-scale vertical TPCT as a passive cooling system for a nuclear research reactor spent fuel storage pool. An experimental investigation and numerical simulation using RELAP5/MOD 3.2 were used to investigate the TPCT thermal performance. The effects of the initial pressure, filling ratio, and heat load were analyzed. Demineralized water was used as the TPCT working fluid. The cooled water was circulated in the water jacket as a cooling system. The experimental results show that the best thermal performance was obtained at a thermal resistance of $0.22^{\circ}C/W$, the lowest initial pressure, a filling ratio of 60%, and a high evaporator heat load. The simulation model that was experimentally validated showed a pattern and trend line similar to those of the experiment and can be used to predict the heat transfer phenomena of TPCT with varying inputs.

• 자원환경지질
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• 제19권1호
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• pp.57-66
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• 1986

The ore deposit of the Ohtani mine is one of representatives of plutonic tungsten-tin veins related genetically to acidic magmatism of Late Cretaceous in the Inner zone of Southwest Japan. Based on macrostructures of vein filling, three major mineralization stages are distinguished by major tectonic breaks. The constituents of ore minerals are scheelite, cassiterite, chalcopyrite, pyrrhotite, sphalerite, with small amounts of cubanite, stannite, galena, native bismuth, bismuthinite, arsenopyrite and pyrite. The relationship between the polymorphic variations of pyrrhotite and the kinds of the associated characteristic of ore mineral, in relation with hypogene mineralization, has been demonstrated. Pyrrhotite of stage I is predominantly of the hexagonal phase (Hpo>Mpo). Pyrrhotite of stage II is mainly of the monoclinic phase ($Hpo{\ll}Mpo$). Pyrrhotite of stage III is a single monoclinic phase ($Hpo{\ll}Mpo$). The compositions of the hexagonal pyrrhotite decrease in Fe content ranging from 47.44 atom % Fe in stage I to 46.88 atom % Fe in stage III.

• 대한핵의학회지
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• 제34권2호
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• pp.135-143
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• 2000

목적: 방광요관역류는 감염과 동반될 경우 신장기능이 비가역적으로 손상될 수 있으므로 신기능의 손상이 오기 전에 역류를 제거하여야 한다. 방사성동위원소 배뇨방광촬영술에 의해 발견된 역류의 특징을 이용하여 신장의 예후를 예측할 수 있는지 그리고 어떤 특징이 중요한지 조사하였다. 대상과 방법: 35명의 환아(남 18, 여 17)의 66개의 신장을 대상으로 초기 DMSA 스캔을 시행하고 이어 방사성동위원소 배뇨방광촬영술을 한 후 다시 DMSA 추적 스캔, 초음파 및 임상소견으로 악화여부를 평가하였다. 방사성동위원소 배뇨방광촬영술에 나타난 각 배뇨시기별 역류량과 역류범위를 각각 또는 종합하여 단계별 다변량판별분석을 하였다. 결과: 충만시의 역류범위와 배뇨후기의 역류량과 역류범위가 유의한 판별능을 보였다. 역류량과 범위를 종합한 변수를 이용한 판별분석에서는 총 역류량이 유의한 변수이었다. 충만시의 역류범위과 배뇨후기의 역류량과 역류범위로 구성한 판별식은 재래식 역류등급으로 예후를 예측할 때 보다 양성예측율과 특이도가 높았다. 결론: 방사성동위원소 배뇨방광 촬영술에 나타난 각 배뇨시기별 역류의 양과 범위를 종합하여 신장의 예후를 예측할 수 있다.

• Nuclear Medicine and Molecular Imaging
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• 제41권1호
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• pp.68-69
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• 2007

A 44-year-old female underwent three-phase bone scintigraphy for an evaluation of right hip joint pain. The blood-flow and blood-pool images show a pelvic blush with a photopenic center (doughnut) prior to bladder filling. On the three hour delayed image, the pelvic uptake disappeared. The scintigraphic findings indicated the possibility of an early pregnancy. However, plain radiography demonstrated an intrauterine device. A uterine doughnut developed as a result of photon attenuation of intrauterine device.

• International Journal of Vascular Biomedical Engineering
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• 제1권1호
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• pp.3-12
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• 2003

Ultrasonic pulsed Doppler velocimetry has become a standard international method of classifying carotid disease. Because the measured angle adjusted velocity increases as the Doppler angle increases, examinations should be performed at a convenient standard Doppler examination angle. An angle of 60 degrees is achievable throughout most examinations. Multiple Doppler viewing angles allow the acquisition of velocity vectors during the cardiac cycle, revealing the complex velocity patterns. Ultrasonic velocimetry (whether Doppler or time domain) is based on changes in the phase of the ultrasound echo. Other examinations can be done based on the echo phase. Slow motions of organs such as the brain can be used to monitor changes in edema. Measurements of tissue strain due to the pulsatile filling of the arterioles. This plethysmographic imaging method can display differences in tissue perfusion because of different tissue types and changes in autonomic activity.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1988년도 전기.전자공학 학술대회 논문집
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• pp.422-425
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• 1988

The structure consisting of an E-plane dielectric slab partially filling a rectangular waveguide is examined with attention on those higher order mode propagation characteristics that are relevant to the design of nonreciprocal remanence ferrite phase shifters. The mechanisms for the elimination of $LSE_{11}$, $LSM_{11}$, $LSE_{12}$ modes are introduced. Experimental verification of elimination of higher order mode is shown in the form of insertion loss measurements.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1997년도 하계학술대회 논문집 A
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• pp.51-53
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• 1997

Even though, many types of induction motors are known, most of the single phase induction motors being used are of squirrel cage type. However, basic structure of the machine has not been changed a lot during the past century. Author had been experienced many experiments with modified rotor. The modification was completed by doing two procedures: an elimination of lamination in central pan of the rotor and filling of melted aluminium in it instead. This paper demonstrates the reason for higher efficiency.