• Journal of Korean Society of Water and Wastewater
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• v.29 no.1
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• pp.89-96
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• 2015

Smart water grid is a water network with communication to save water and energy using various water resources. In smart water grid, water product from the various sources can be blended to be supplied to end-users. The product water blending was reported by literatures while feed water blending has been rarely reported so far. In this work, a commercial reverse osmosis (RO) system design software provided by a membrane manufacturer was used to elucidate the effect of feed water blending on the performance of seawater reverse osmosis (SWRO) plant. Fresh water from exisiting water resource was assumed to be blended to seawater to decrease salt concentration of the RO feed water. The feed water blending can simplify the RO system from double to single pass and decrease seawater intake amount, the unit prices of the RO system components including high pressure pump, and operation risk. Due to the increase in RO plant capacity with the feed water blending, however, the RO membrane area and total power consumption increase at higher water blending rates. Therefore, a specific benefit-cost analysis should be carried out to apply the feed water blending to SWRO plants.

• The Journal of the Korea Contents Association
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• v.15 no.5
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• pp.1-17
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• 2015

In domestic game market, the video game market is getting smaller and also decreasing funds and high level developers. So we need the software that can help us to make more realistic and high quality contents by non-expert developer in poor environments. In this paper, we selected global studio's animations which were scored good evaluation by public and critics as a well-made emotional expression that can convey the emotion properly. We selected movements that express emotions from the animation scripts by using Ekman's 6 basic emotions and Greimas' dynamic predicate, and then we had analyzed and categorized with the data. We also analyzed the movements for which data we needed to create specific movements to express emotions by using 'Animation Layer' that used in Unity's blending process. And suggest concept of the program that to create the emotional expression movements by using those analyzed data.

• Proceedings of the Korea Contents Association Conference
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• 2008.05a
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• pp.648-652
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• 2008

We all know *.x file is a bridge of the 3D model developer and the game developer. In today's 3D game programming, more and more advanced hardware support it to run, but we still need to consider the methods to generate the animations. 3D model maker is tired of rectifying the skeletal animations. If he mistakes one point in some one animation, this will lead to distortion in *.x file. Then the modification consumes long time. So finding a good blending method is the best choice for generating multiple skeletal animations. There were some methods for animations blending. In this paper, we could use 3D max or Maya to blend animations; and we could use *.x file and blend animations in coding. And we will use 3D max 8.0 to export the *.x file and present a better way to combine skeletal animations.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.10 no.7
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• pp.1648-1653
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• 2009

Fossil fuel causes the greenhouse effect by emitting $CO_2$, and an estimated amount of oil deposits are also limited. Therefore, people have been interested in alternative energies. Vegetable oil which is one of the alternative energies is eco-friendly renewable energy source and has similar properties like diesel oil with high efficiency. Also, vegetable oil has been well recognized as one of solutions to reduce the greenhouse effect caused by $CO_2$release. In this study, we chose Waste vegetable oil(WVO) to solve the problems of high price of grain and lack of food. Impurities and sediments from WVO were removed by separation process using sieves of $15{\mu}m$pore size. Blending was performed in Homo-mixer by 5000 rpm for 10 min. We investigated viscosities and Iodine values in different compositions of WVO and diesel oil blends. Finally, we could find out blended oils have some possibility to be used in the diesel engine.

• Polymer(Korea)
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• v.35 no.3
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• pp.249-253
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• 2011

The effect of morphological development in PET/PEN blending on the physical properties of PET/PEN blend film as a flexible substrate was investigated. The two phase morphology was obtained in PET/PEN blends and it caused the improvement of dimensional stability of PET/PEN blend as a flexible substrate. The two phase morphology and crystallinity of PET/PEN blends could be controlled by the transesterification between PET and PEN during the film processing and this macroscopic structural development affected the dimensional stability of PET/PEN blend films. Better dimensional stability was obtained with increasing crystallinity and decreasing the level of transesterification.

• Membrane Journal
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• v.29 no.3
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• pp.155-163
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• 2019

The anion exchange membrane using the blending polymer of poly(ether sulfone) and poly(phenylene sulfide sulfone) was prepared. It was confirmed by EDXS and FT-IR analysis that the prepared anion exchange membrane had the -N- as an anion exchange group. The ionic conductivity in 1 mol/L $H_2SO_4$ aqueous solution was measured. The ionic conductivity of the prepared anion exchange membrane was 0.015~0.083 S/cm, and had a high value compared with AFN and APS as a commercial anion exchange membrane. Permeabilities of the vanadium ions through the prepared anion exchange membrane were tested to evaluate the possibility as a separator in vanadium redox flow battery. Vanadium ion permeation rate in the prepared anion exchange membrane had a low value compared with Nafion 117 as a commercial cation exchange and AFN as a commercial anion exchange membrane.

• 한국HCI학회:학술대회논문집
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• 2006.02a
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• pp.455-462
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• 2006

본 논문에서는 저가의 보급형 프로젝터를 사용하고 Programmable GPU 기법중 Pixel Shader 기술을 이용하여 에지블렌딩을 수행하였으며, $7{\times}4$ 개의 프로젝터로 구성된 $6592{\times}2784$ 픽셀의 초고해상도를 가지는 $5.6m{\times}2.4m$ 의 대형 타일드 디스플레이를 구축해 보았다. 또한 타일드 디스플레이용 응용프로그램으로서 타일드 디스플레이 시스템을 마치 하나의 컴퓨터처럼 작동시킬 수 있는 타일드 디스플레이 관리 프로그램을 개발했으며, 이 프로그램은 컴퓨터와 프로젝터 제어, 응용프로그램 실행 및 종료를 담당한다. 그 외에도 일반 컴퓨터에서는 실행이 불가능한 초고해상도의 이미지 및 동영상까지도 볼 수 있는 이미지 뷰어와 동영상 플레이어를 개발하였다. 또한 100 만 폴리곤 이상의 3D 모델을 실시간으로 인터렉션 할 수 있는 3D 뷰어 등을 개발 하였다.

• Proceedings of the Korean Society of Broadcast Engineers Conference
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• 2019.11a
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• pp.73-75
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• 2019

360°VR 영상은 카메라에서 촬영된 여러 영상들을 이어 붙이는 작업인 스티칭(Stitching)을 통하여 만들 수 있다. 스티칭은 영상들을 이어 붙이기 위해 각 영상의 특징점을 추출하는 특징점 추출, 특징점간 유사도를 비교하여 유사한 특징점끼리 매칭시키는 특징점 매칭, 특징점 매칭 과정에서 획득한 호모그래피 매트릭스를 이용한 이미지 와핑, 각 영상 간의 부자연스러운 경계선을 제거하는 블렌딩 과정을 거친다. 고품질의 360°VR 영상을 획득하기 위해서는 영상의 개수를 증가시킬 필요가 있고, 이로 인해 스티칭 과정에서 소요되는 시간이 증가한다. 본 논문에서는 카메라 센서 정보를 이용해 유사한 영상끼리 클러스터링하여, 한번에 스티칭이 진행되는 영상의 수를 감소시키고, 멀티 스레드를 이용하여 각 그룹의 스티칭을 병렬적으로 진행한 뒤, 최종적으로 스티칭하여 최종 360°VR 영상을 획득하는 과정을 제안한다.

• Proceedings of the Korean Fiber Society Conference
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• 2002.04a
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• pp.377-380
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• 2002

PET는 합성섬유를 비롯한 필름 및 각종 공업용 소재에 이르기까지 매우 광범위한 용도를 가지는 대표적인 범용 고분자의 하나이다. 그러나 최근 고성능 재료에 대한 관심의 증가로 PET를 개질하여 그 용도를 넓히려는 연구[1-2]가 많이 진행되고 있지만 PET 자체의 한계로 인해 실제 응용 면에서 어려운 점들이 야기되고 있다. 특히 PET 보다 열안정성, 형태안정성 및 기계적특성이 우수한 PEN을 이용하여 PET와 용융 블렌딩함으로써 PEN의 장점을 보다 폭넓게 활용하는 동시에 PET의 이러한 단점을 개선하려는 연구 [3-4]들이 일부 보고되고 있지만 고점도 PEN을 이용한 PEN/PET용융 블렌드 필라멘트의 제조와 물성에 대한 연구는 미흡한 실정이다. (중략)

• Proceedings of the Korean Fiber Society Conference
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• 2002.04a
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• pp.255-258
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• 2002

폴리에스테르계 고분자를 용융온도 이상에서 가공하면 두 고분자간의 화학적인 상호교환반응이 일어나고, 이러한 상호에스테르 교환반응은 이들의 공중합체를 생성시켜 블렌드계의 상용성을 증대시킬 수 있으며, 구조와 물리적 성질을 상당한 수준까지 변화시킬 수 있기 때문에 용융가공시 중요한 인자가 되고 있다. 일반적으로 상호에스테르 교환반응에 의해 공중합체가 형성될 때 반응초기에는 블록 공중합체가 형성되며, 반응이 진행될수록 랜덤 공중합체가 형성 [1] 되며, 블렌딩 시간, 온도 그리고 조성비에 따라 상호교환방응 정도가 달라지게 된다[2-3]. (중략)