• 한국소성가공학회:학술대회논문집
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• 한국소성가공학회 2009년도 추계학술대회 논문집
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• pp.95-98
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• 2009

This paper dealt with the design guide of the conventional edge-lit backlight optic with which the on-axis luminance could be increased by trying to improve the light condensing efficiency of a bright enhancement film (BEF). First, the general design guide concerned with the backlight optic was proposed, and then its validness was experimentally proved by conducting design examples with haze controls of both diffuse film and microdot material printed on the backside of the light guide plate. Experimental results showed that the variation range of the on-axis luminance by the present approach was about $5{\sim}9%$, which would be by no means negligible in the practical application.

• 소성∙가공
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• 제11권4호
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• pp.341-348
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• 2002

For the light guide plate of the TFT-LCD, there have been increasing demands for higher brightness, thin and light-weight design, and lower power consumption. To meet these demands, a micro-prism-type frontlight that integrates a prismatic sheet and a light-guiding plate has been developed. In this paper, the influences of processing conditions on the brightness were studied lot the injection molding of the light guide plate. Based on the experiment with an actual mold, the design of experiments and the neural network theory were used lot choosing the optimal processing parameters to increase the brightness and the uniformity. The verification experiment also showed that the brightness and the uniformity were increased dramatically with the chosen processing conditions.

• 조명전기설비학회논문지
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• 제26권6호
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• pp.53-58
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• 2012

A conductor has been produced according to IEC standard and low voltage electrical facility has been installed according to IEC 60364. But because of many related and varied standards, it is difficult to apply to design and inspect for electrical equipment. We researched the necessity of design guide which is detailed and systematization from survey. For detailed design guide, we suggest application method and review items at calculations for voltage drop calculations on low voltage feeder by IEC 60364, BS 7671 standard and Consumer's Electrical Installation Guide.

• 한국소성가공학회:학술대회논문집
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• 한국소성가공학회 2004년도 춘계학술대회 논문집
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• pp.19-22
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• 2004

A scheme of shape optimization by new approximation approach is applied to design of a flow guide in three-dimensional extrusion processes. The optimization scheme is presented to reduce computation time fur the optimization process and applied to an H-section extrusion problem for verifying the efficiency and the usefulness. The object of optimization is to minimize the deviation of exit velocity and control points of a Bezier curve describing the shape of the flow guide are regarded as design variables. The effectiveness of the proposed scheme is then demonstrated through the applied example.

• 한국광학회:학술대회논문집
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• 한국광학회 2007년도 하계학술발표회 논문집
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• pp.15-16
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• 2007

A design of a light coupler between a LED and a very thin light guide (0.2mm thickness) is presented. Due to the light guide's very thin thickness, conventional light couplings between LEDs and light guides do not provide enough coupling efficiency. We investigate two different coupling methods: side coupling using a complex-shaped lens and bottom coupling using a grating. This paper presents a draft design of the first approach which couples light from 0.4mm LED to 0.2mm light guide without significant losses.

• 대한설비공학회:학술대회논문집
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• 대한설비공학회 2008년도 하계학술발표대회 논문집
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• pp.1172-1177
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• 2008

Diverging channel from gas burner exit to the inlet section of Heat Recovery Steam Generator (HRSG) has been re-designed for 1 MW steam supply and power generation system. Three different test geometries have been chosen for the numerical simulation. The existing design for 300 kW HRSG system (CASE B) has been improved by geometry and position changes of inlet guide vanes along with gas velocity entrance angle at the diverging channel inlet (CASE C). Both cases has been compared with the case where hot combustion gas is directly injected without any guide vanes (CASE A). Improved design shows overall uniform velocity and temperature distribution compared to existing design.

• 소성∙가공
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• 제11권4호
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• pp.332-340
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• 2002

The light guide plate of the TFT-LCD reflects the light originated from the light source, and guides the light to the front side of LCD so that we can see images vividly. This paper is concerned with tile injection molding of the light guide plate for the reflective typed LCD related to IMT-2000. The finite element analysis has been carried out based on the pine stress theory to predict both the thermal stresses of the products in the post-filling stage and the in-plane deformation behavior of the products after ejection process. Based on the simulation results, the mold for the light guide plate of a 2inch sized LCD has been designed.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2002년도 추계학술대회 논문집
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• pp.875-878
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• 2002

Braiding machines of maypole type have complex guide tracks. It is not easy to speed up drivers while carriers are moving with being at high speed. This paper presents a new design approach using dynamic analysis for moving carriers on the guide tracks. The proposed approach will be shown to be effective by using the simulation tool, WORKING MODEL 2D(equation omitted), for the high speed drivers on new models of braiding machines of maypole type.

• 과학교육연구지
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• 제47권2호
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• pp.117-126
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• 2023

초등 과학 교사용 지도서에서 초등교사들이 과학수업을 준비하고 진행하는 과정에서 느끼는 어려움을 해결하는 데 도움을 줄 수 있는 각론은 중요하다. 2022 개정 교육과정 초등 과학 교사용 지도서를 개발하는 데 시사점을 얻기 위해서는 지도서 각론에 대한 초등교사들의 인식과 요구 조사가 필요하다. 이에 본 연구에서는 초등 과학 교사용 지도서 각론의 구성 요소와 디자인에 대한 분석을 바탕으로 설문지를 개발하여 초등교사들의 인식과 요구를 알아보고자 하였다. 이를 위해 먼저 초등교사들이 현재 사용하고 있는 지도서 각론의 구성 요소별 필요성, 만족도와 활용도에 대한 인식을 조사하였다. 다음으로 지도서 각론의 구성 요소와 디자인 등에 관한 교사들의 요구를 조사하였다. 연구 결과는 다음과 같았다. 첫째, 수업 준비와 진행에 도움이 되는 구성 요소들에 대해 초등교사들의 만족도가 상대적으로 높았다. 둘째, 초등교사들은 수업에 필요한 구성 요소들을 한눈에 파악할 수 있는 배치와 가독성 높은 디자인 구성을 원하였다. 결론적으로 초등 과학 교사용 지도서 각론은 과학 교수·학습에 필요한 수업 준비, 수업 흐름, 교수·학습 자료 등을 한눈에 파악하고, 가독성 높게 구성해야 함을 알 수 있었다. 이 연구 결과를 토대로 향후 초등교사들이 실제 수업에 활용할 수 있는 교과용도서가 될 수 있게 새로운 접근과 시도를 해야 할 것이다.

• 설비공학논문집
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• 제24권5호
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• pp.428-432
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• 2012

In the waste collection system, living waste is collected through the piping network. There are many confluent pipes in a piping network. These confluent pipes were often clogged up with waste. The optimal configuration of the confluent pipes has been defined by the design guide. However, nobody know how this design guide were determined. Therefore, in this paper, we found the design data for the confluent pipe configuration in order to avoid the waste clogging in a piping network. The distance between connected point on the confluent pipes should be longer than the previous design guide.