• 한국농업기계학회:학술대회논문집
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• 한국농업기계학회 1993년도 Proceedings of International Conference for Agricultural Machinery and Process Engineering
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• pp.704-713
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• 1993

A principle for the determination of reel stagger, based on reel kinematics and crop stem deflection , is proposed. Equation derived theoretically and information obtained empirically are combined to obtain an algorithm for the determination of reel stagger. The algorithm has yet to be evaluated on actual combine harvesters in the harvesting mode.

• 대한안전경영과학회지
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• 제23권4호
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• pp.49-53
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• 2021

The objective of this study was to understand which type of fire hose should be placed in indoor fireplug box upon analyzing the preparation time between rack-type fire hose and reel-type one. With respect to the type of hose, rack-type stacking method was used and hose preparation time was measured with 5 times of repeat test, separating men and women. Study results reveal that preparation time of reel-type fire hose took longer than that of rack-type one in both men and women. For both rack-type hose and reel-type hose, preparation time by two persons took shorter than that by one man. Also, preparation time by three persons took shorted than that by two women. Preparation time for both rack-type hose and reel-type one by men took shorter than that by women. In summary, it was confirmed that rack-type hose could be prepared within shorter time than reel-type one. Since the size of drum set in the reel-type fire hose is relatively small, it had some difficulty in preparation of fire hose timely.

• 한국기계가공학회지
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• 제9권1호
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• pp.61-66
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• 2010

Pay off reel is the device to release in the form of coil. Every time the device becomes a hassle to exchange, each diameter of two forms has been applied to the coil reel. There is the change of reel diameter of the sleeve portion to be the part of segment geometry. This unit is conducting on 3-dimensional modeling design. The basic strength and deformation of the device could be checked in advance by the basis of 3-d modeling data to perform simulations. The production of each part can be completed and assembled. Conducted for the final product which is tested and measured, all items are satisfied within the limits of targets. Due to the development of this device, the efficiency on operations can be increased and the production time becomes shortened.

• 한국해양공학회지
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• 제17권2호
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• pp.21-26
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• 2003

The reel-lay method of submarine pipelines a continuous string of pipe coiled onto a reel. Assembly of this pipe that is string is accomplished onshore by welding, and nondestructive testing is carried out prior to coiling the pipe. The total length of pipes on the reel depends on the reel and pipe diameters. Pipeline installation is accomplished by uncoiling, straightening the pipe, and laying out the pipe string onto the seabed as the barge moves forward. Installation associated with coiling and uncoiling is related to the bending moment and strain relationship of the pipeline, A highgrade pipe material is required when the reel-lay method is used. This paper is concerned with the highly plastic bending moment of the pipeline, including the effect of ovality. Moment calculation in the pipe is accomplished by the numerical method, including the variable ovalities during the plastic bending of the pipe string. The new calculation method of the high plastic bending moment was applied to the reel-lay method.

• 한국초전도학회:학술대회논문집
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• 한국초전도학회 2006년도 High Temperature Superconductivity Vol.XVI
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• pp.65-65
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• 2006

• 한국초전도학회:학술대회논문집
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• 한국초전도학회 2003년도 High Temperature Superconductivity Vol.XIII
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• pp.86-86
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• 2003

• Progress in Superconductivity
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• 제11권2호
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• pp.100-105
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• 2010

Reel-to-reel deposition of $Y_2O_3$ has been performed on Ni-5%W metal substrates using the RF-sputtering method. The epitaxial orientation of $Y_2O_3$ buffer layers to the base bi-axially textured substrate was well identified using ${\theta}-2{\theta}$, out-of-plane ($\omega$), and in-plane ($\phi$) scans in X-ray diffraction analysis. The optimization of $Y_2O_3$ seed layers in reel-to-reel fashion were investigated varying the deposition temperature, sputtering power, and pressure for its significant roles for the following buffer stacks and superconducting layers. $Y_2O_3$ were all grown epitaxially on bi-axially textured metal substrates at 380 watts and 5 mTorr in the temperature range of $600-740^{\circ}C$ with higher $Y_2O_3$ (400) intensities at ${\sim}710^{\circ}C$. It was found that the $\Delta\omega$ values were $1-2^{\circ}$ lower but the $\Delta\phi$ values were above $1^{\circ}$ higher than that of Ni-W substrates. As the sputtering power increased from 340 to 380 watts, $\Delta\omega$ and $\Delta\phi$ values showed decreased tendency. Even in the small window of deposition pressure of 3-7 mTorr, the $Y_2O_3$ (400) intensities increased and $\Delta\omega$ and $\Delta\phi$ values were reduced as sputtering pressure increased.

• 한국초전도ㆍ저온공학회논문지
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• 제9권1호
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• pp.18-21
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• 2007

Highly textured MgO template by ion-beam-assisted deposition(IBAD) was successfully fabricated using a continuous reel-to-reel(R2R) mode. To enlarge the deposition area, the previous IBAD system was modified into the system with 14-pass and five heating zone. Every processing step was carried out using this multi-turn IBAD system. The overall process consists of R2R electropolishing of a hastelloy C276 tape, deposition of $Al_2O_3$ diffusion barrier, $Y_2O_3$ seed layer, IBAD-MgO and homoepi-MgO layer. The IBAD-MgO templates were fabricated using the IBAD system with 216 cm-length deposition zone and 32 cm diameter ion source. The texture of MgO films developed during the IBAD process was monitored by in-situ reflection high energy electron diffraction(RHEED) to optimize the IBAD process. Recently, 100 m long IBAD-MgO tape with in-plane texture of $\Delta{\phi}<10^{\circ}$ was successfully fabricated using the modified IBAD system. In this report, the detailed deposition condition of getting a long length IBAD-MgO template with a good epitaxy is described.

• 한국화재소방학회논문지
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• 제33권2호
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• pp.63-67
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• 2019

본 연구에서는 호스릴옥내소화전의 압력손실 실험을 실시한 후 각 요소의 압력 손실에 미치는 영향을 비교 분석하였다. 첫째, 호스릴옥내소화전의 호스릴 길이에 따른 압력손실 실험에서, 호스릴의 길이가 길어짐에 따라 압력 손실이 증가하였으며, 이는 25 m 호스를 기준으로 일반 옥내소화전 호스에 비하여 38.86% 만큼 압력손실이 증가하는 것을 알 수 있었다. 둘째, 단위 길이 당 호스릴의 압력손실은 $.13{\sim}.15kgf/cm^2$으로 측정되었다. 셋째, 유량의 변화에 따른 압력손실 실험에서는 일반 배관 유동에서의 유량-압력손실 관계(${\Delta}P{\sim}Q^2$)와 유사한 결과를 얻을 수 있었다. 이 연구 결과는 호스릴옥내소화전이 사용되는 건축물에 펌프의 양정계산, 호스릴옥내소화전의 성능위주소방설계에 기초자료로 활용될 수 있을 것이다.

• 한국초전도ㆍ저온공학회논문지
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• 제7권3호
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• pp.9-12
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• 2005

[ $Y_1Ba_2Cu_3O_{7-8}$ ] (YBCO) coated conductor has been fabricated by batch-type process using oxide-precursor-based metal-organic deposition (MOD) method. The batch-type process can be scaled up more simply to Produce long-length YBCO conductor than the reel-to-reel process. Also, it has less handling problems and is adequate to the ambient gas environment. In this work, YBCO oride powder was used as a starting precursor for MOD method. After reel-to-reel dip coating process, me ter-long-buffered metal tape was wound around a cylinder and underwent calcination and annealing processes. Annealed YBCO films showed good c-axis alignment and dense surface morphology with no cracks, but exhibited very low critical current density of $10^5\;A/cm^2$.