• 한국연소학회지
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• 제12권3호
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• pp.24-32
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• 2007

A theoretical model was developed for rotary kiln and computational study was conducted to find the effect of feeding characteristics. One dimensional model with the variations of heating distribution, length of heating zone, excess air ratio and revolution was considered. The comparison of parallel-flow rotary kiln with that of counter-flow was conducted. For parallel-flow type, it is found that the variation of temperature of solid is not great for the zone that is following flame-heating zone. This zone is good to take the special treatment because thermal deviation is small and contacting time is enough for another treatment. Increase of excess air ratio have the effect of decreasing solid temperature. But this effect of decreasing solid temperature goes small for the great excess air ratio. The heating is efficient for the flame which has the maximum heating at the central region of the full length.

• 한국어업기술학회:학술대회논문집
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• 한국어업기술학회 2001년도 춘계 수산관련학회 공동학술대회발표요지집
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• pp.315-316
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• 2001

To understand feeding habits of Cheaenogobius mororanus, this study has been conducted by analyzing stomach contents. C. mororanus were monthly collected from the intertidal zone of Dodun-ri, Sochon from May 1997 to April 1998. Fullness of stomach was increased twice a day, in the morning and afternoon. C. mororanus(1.0 ∼5.9 cm in standard length) was a carnivores consuming mainly decapods, amphipods and copepods. (omitted)

• Asian-Australasian Journal of Animal Sciences
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• 제2권3호
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• pp.325-326
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• 1989

• 한국어류학회지
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• 제28권2호
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• pp.87-92
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• 2016

본 연구는 2014년 4월~2015년 3월까지 순천시 벌교읍 호동리의 개펄 조간대에서 출현하는 짱뚱어 Boleophthalmus pectinirostris 198개체를 대상으로 식성을 조사하였다. 짱뚱어의 전장은 6.5~18.7 cm의 범위를 보였다. 짱뚱어는 규조류를 주로 섭식하는 초식성이었다. 와편모조류, 선형동물 등도 섭식하였지만 그 양은 적었다. 짱뚱어는 모든 크기군과 계절에서 규조류 (주로 Pleurosigma spp., Navicula spp., Nitzschia spp., Gyrosigma spp.)를 많이 섭식하였다.

• 한국연소학회지
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• 제7권3호
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• pp.16-22
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• 2002

Combustion performance of an internally cycloned circulating fluidized bed for paper sludge was discussed through a series of batch type experiments. Operation parameters such as water content, feeding mass of sludge and secondary air injection rate were varied to find out the effect on the combustion performance, which was examined with carbon conversion rate and pollutant emission such as CO and NOx. A conventional solid fuel reaction was observed in the experiments of varying water content and feeding mass of the sludge, which is characterized with kinetic limited reaction zone, diffusion limited reaction zone and transition zone. Secondary air injection with swirl enhances the mixing of the gas phase as well as the solid phase, and improves combustion efficiency accompanied with higher carbon conversion rate and lower pollutant emission rate.

• 한국생산제조학회지
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• 제18권6호
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• pp.585-589
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• 2009

Extruder is divided to greatly three part at extrusion process. First, by hopper(Hopper) second, barrel(Barrel) with Screw that is point of extruder and third that is raw material supply wealth extrusion into dies(DIES) Part that decide shape of do product greatly divide. Hopper is role that distribute in raw material supply wealth (Feeding zone) of Screw preserving raw material in state of high quality how at extrusion process, and make distributed raw material as Screw in barrel rotates and 3 stage and inflicting heat and pressure raw material melting(Melting) state. And raw material of melting state Screw's measuring stoker(Metering zone) whereabouts anaphora do and product is completed through pipe channel of dies. Dies that is the most important as Screw in extrusion is part that is last part of melting state process of raw material and causes huge effect in quality of product. If more than design of dies happens, manufacture itself of dies is hard, but there are a lot of amount of losses accordingly. In this research, make pipe channel that raw material of melting state flows in dies can present dies basic design method through flow analysis of ideal pipe channel using CFdesign.

• 한국양식학회지
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• 제13권4호
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• pp.309-316
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• 2000

조간대에서 서식하는 비늘흰발망둑의 섭식 생태를 파악하여 연안 생물 군집의 먹이 사슬에 관한 기초 지식을 얻고자, 1996년 7월부터 1997년 6월까지 충남 서천군 서면 도둔리에서 매월 1회씩 비늘흰발망둑을 채집하여 위 내용물 분석을 통해 섭식 생태를 조사하였다. 위 만복도는 하루 중 오전과 오후에 각각 한 차례식 증가하는 경향을 보였다. 비늘흰발망둑(1.2~5.9cm SL)의 주요 먹이생물은 십각류(유영류 유생, 젓새우, 보리새우 및 보행류 유생), 단각류(카프렐라류, 옆새우류 및 하이페리아류), 요각류(Acartia sp., Calanus sinicus, Corycaeus affinis 및 Microsetella sp.) 등으로 식성이 육식성이었다. 그 외 등각류, 만각류 유생, 다모류 유생 및 구각류 등이 소량씩 위 내용물 중에서 발견되었다. 비늘흰발망둑이 성장함에 따라 먹이생물의 조성비가 점차 변하였다. 체장이 작은 비늘흰발망둑은 요각류, 십각류 및 단각류 순으로 먹었으나, 체장이 증가하면서 요각류의 비율은 점차 낮아진 반면, 십각류와 단각류가 위 내용물 중 차지하는 비율은 점차 증가하였다.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2015년도 제46회 하계학술대회
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• pp.1617-1618
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• 2015

This paper analyzed catenary impedance characteristics of relays installed in substation and sectioning post to protect power feeding circuit in the extended power feeding conditions. For this, we modelled AT feeding system using PSCAD/EMTDC and calculated catenary impedance. The relay installed in substation calculated catenary impedance of the extended power feeding area adding catenary impedance of self protection zone. But, the relay installed in sectioning post calculated catenary impedance of the only protection area. Therefore, we confirmed that the more reliable protection way can be utilized using the relay installed in sectioning post.

• Journal of Welding and Joining
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• 제18권3호
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• pp.83-88
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• 2000

Laser cladding processing allows rapid transfer of heat to the material being processed with minimum conduction into base metal, resulting in low total heat input. The effects of Nd:YAG laser cladding with wire feeding on the mechanical properties of Inconel alloy were investigated. inconel alloy is used as the material of nuclear steam generator tubing because of its mechanical properties and corrosion resistance properties. The device for Nd:YAG laser cladding with wire feeding was designed. It consists of the wire feeding system, the wire cladding system and the shielding gas system which prevents the clad layer from being oxidized. Experimental as results indicated that the wire feeding direction and position were important for laser cladding with wire feeding. The wire feeding speed should be adapted according to cladding speed for good shaping of clad layer. The effect of heat on the HAZ size can be limited and the growth of grain size of HAZ size was not serious. The hardness of clad layer and heat affected zone increased with increasing of cladding speed.

• 한국결정성장학회지
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• 제3권2호
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• pp.117-124
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• 1993

연속성장법은 crystal growth chamber의 상부에 있는 reservoir에서 원료 분말을 연속적으로 공급하면서 도가니 하부에 용융대를 형성시킨 후, 종자결정을 용융대에 dipping하여 회전시키면서 아래로 끌어내려 단결정을 성장시키는 방법이다. 본 연구에서는 연속 성장법을 이용하여 silicon 단결정을 육성시켰으며 연속성장에 영향을 미치는 인자는 critical melt level, 원료공급속도, 성장속도, graphite crucible과 gruphite susceptor의 형태, work coil의 위치에 따른 graphite susceptor의 수직온도구배, 중력과 종자결정의 회전에 의한 원심력이 용융대의 안정화에 미치는 영향과 용융액 표면에서 일어나는 소결현상에 관해 고찰하였다.