• Title/Summary/Keyword: Manufacture

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The Design and Manufacture of Ku-Band Circular Waveguide with Circular Polarizaed Wave Characteristic (원편파 특성을 갖는 Ku-밴드 원형도파관 안테나 설계 및 제작)

  • 이성재
    • Journal of the Korea Institute of Military Science and Technology
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    • v.4 no.1
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    • pp.124-136
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    • 2001
  • In this paper, we designed and manufactured the Ku-band circular waveguide antenna to do wireless communication with a ground radar as on-board antenna of missile. Using the MATLAB and the HFSS, we designed the circular polarizer which has a characteristic of circular polarization and broadband using the capacitive pin method, the feeder to feed coaxial line to circular waveguide, and a stopper to prevent a conductor material from being inserted. Then we simulated the designed antenna using the HFSS, obtained the gain and the radiation pattern. Because of a difficulty of manufacture, we established a manufacture process procedure. Antenna is manufactured with this procedure, test results of the manufactured antenna are the axial ratio of 1.37 ~ 1.72, the 3 ㏈ beamwidth of $72.23^{\circ}{\sim}78.54^{\circ},$ and the gain of 3.26 ~ 4.61 ㏈ within frequency band. We knew that these results are similar with simulation results. Also, we confirmed that the manufactured antenna is satisfied with requirement conditions through performance test, environmental test and flight test.

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Optimization Methodology Integrated Data Mining and Statistical Method (데이터 마이닝과 통계적 기법을 통합한 최적화 기법)

  • Jung, Hey-Jin;Song, Suh-Ill
    • Proceedings of the Korean Society for Quality Management Conference
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    • 2006.11a
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    • pp.205-210
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    • 2006
  • Nowaday manufacture technology and manufacture environment are changing rapidly. By development of computer and enlargement of technique, most of manufacture field are computerized. It is measured automatically do much quality characteristics thereby and great many data happen in a day. corporations is important if have gotten fast information that are useful from wide data to go first in international competition according to these change. Statistical process control(SPC) techniques are used as a problem solution tool at manufacturing process until present. However, this statistical methods is not applied more extensively because have much restrictions in realistic problem. In this paper, wish to develop more realistic and scientific new statistical design techniques doing to integrate data mining(DM) and statistical methods by the alternative to cope these problem. First step selects significant factor using DM techniques from datas of manufacturing process including much factors and second step wish to find optimum of process after get the estimated response function through response surf ace methodology(RSM) that is statistical techniques.

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Thermodynamic Behaviors of Carbonate Linking Group in Monomer and Dimer Liquid Crystals (단체량 및 이량체액정에서 나타나는 Carbonate 결합기의 열역학적거동)

  • 남수용
    • Journal of the Korean Graphic Arts Communication Society
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    • v.13 no.1
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    • pp.13-24
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    • 1995
  • The color filter os made in four methods ; dyeing, printing electrodisposition and pigment dispersed method. Among technologies for color filter manufacture, pigment-dispersed and hybrid method are dominant over all others in commercial manufacture of large scale, fine resolution color filter for liquid crystal display. In this paper to investigate the possibility of the color filter manufacture for LCD by screen printing method, we synthesyzed PVA/sbQ screen emulation for high resolution, estimated image of printed fine pattern and manufactured color filter by screen printing. Results of the study are as follow and found the screen printing method os useful and valid from it. 1. Fine pattern is formed due to photocyclodomerization of -C=C- bond at 342nm, on the other hand unexposured parts are removed in water. 2. sharpness and resolution of fine pattern is improved at mesh streching angle 22.5 and 45 than 0 degree. It is expected due to resistance between inks and mesh streching angles. 3. Spectral characteristics of sample inks were R(640nm), G(535nm), B(470nm), transmittance were R(92%), G(79%), B(70%) and chromaticity coordinate values were R(0.62,0.33), G(0.32,0.59), B(0.14,0.17)

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Effect of Mixer on the Performance of Ultra-High Strength Steel Reinforced Concrete (초고강도 강섬유 보강 콘크리트의 성능에 미치는 믹서의 영향)

  • Park, Jung-Jun;Koh, Kyung-Taek;Ryu, Gum-Sung;Kang, Su-Tae;Kim, Sung-Wook;Han, Sang-Mook
    • Proceedings of the Korea Concrete Institute Conference
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    • 2006.05b
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    • pp.549-552
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    • 2006
  • Generally the ultra-high strength steel reinforced concrete has rich mix composition composed of high-strength type mineral admixtures and as a result of very low water-binder ratio(about under w/b=25%), it reveals ultra-high compressive strength(about over 100Mpa). Also, in order to obtain sufficient toughness after construction, we usually mix a large quantity steel fiber with ultra-high strength steel reinforced concrete therefore we must use proper mixer for workability. When we make the ultra-high strength steel reinforced concrete we need more long mixing time or much super-plasticizer than when we manufacture normal concrete. These bring about economical problems and performance deterioration. Therefore, in this study, in order to manufacture easily ultra-high strength steel reinforced concrete we develope a dedicated mixer for ultra-high strength steel reinforced concrete with high speed type. It carried out the examination for comparison between the dedicated and general type mixer, the analysis and counterplan of the point at issue when we manufacture ultra-high strength steel reinforced concrete by the dedicated mixer.

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A study on the developmental process of clothing style and the manufacture of clothing material through the works of ancient writing. (고문헌을 통해 본 복식과 의복재료 생산의 발전 과정에 관한 연구)

  • 심화진
    • Journal of the Korean Home Economics Association
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    • v.32 no.5
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    • pp.217-227
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    • 1994
  • The Korean clothing industry according to historical documents has a long and deep history. We can deduce the fact that cloth in material was self reliant during the pre-historic period. Although we can not find evidence of clothing material trade from the Three Kingdom era we find active trade with Kang, Jin of China and Japan followed by the spread of Korean clothing material manufacturing skills to Japan. Meanwhile the actual progress of the clothing industry came with the manufacture of cotton stuff in the Koryo era and the official and unofficial trade which brought import and export activity to Korea. Also the manufacture of clothing material by women labor although backward as it may be can be seen as stroug evidence that women labor continuously kept up the development of Korean industry. After the Koryo dynasty trade in clothing material and other clothing items contined with other nations. In conclusion we must not think that the Korean clothing industry started active development from the Chosun dynasty. It is important that we realize this fact and looking at the continuous progress of the Korean clothing industry through historical documents from early history to the Chosun era we rightly evaluate history and be proud of this legacy and also reevaluate the wrong views held before.

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Development of Standard Sizing System and Grading Rule according to Body Types for Manufacturing Clothing of Elderly Women (노년여성의 의복제작을 위한 체형별 치수 및 그레이딩 체계에 관한 연구)

  • Lee, Jeong-Yim;Joo, So-Young
    • Fashion & Textile Research Journal
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    • v.6 no.4
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    • pp.475-484
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    • 2004
  • The purpose of this study was to suggest the standard sizing system and grading rules according to body types of elderly women. The data were the anthropometric measurements of 329 women aged 60 and older measured in 2001. To determine the effective and useful clothing sizing system, the distribution of hip girth and bust girth of 3 body types which were suggested in KS K 0055 was analyzed, and the significant difference among adjoining hip girth ranges was analyzed, too. And the sizes of major body parts that were used for manufacturing clothing were made to have regular interval between each clothing sizes. From this study, we certified that each different sizing system for 3 body types to manufacture more suitable clothing for elderly women was necessary and suggested the standard size for each body type. And we also suggested the patternmaking sizes that were needed to manufacture ready-made clothing. On the basis of standard size, we suggested the grading rules for 3 body types. And we verified the propriety of the grading rules for 3 body types through the fitting test, and we knew that the grading rules for 3 body types of this study was very useful to manufacture clothing for elderly women.

Innovation and craft in a climate of technological change and diffusion

  • Hann, Michael A.
    • The Research Journal of the Costume Culture
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    • v.25 no.5
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    • pp.708-717
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    • 2017
  • Industrial innovation in Britain, during the eighteenth and nineteenth centuries, stimulated the introduction of the factory system and the migration of people from rural agricultural communities to urban industrial societies. The factory system brought elevated levels of economic growth to the purveyors of capitalism, but forced people to migrate into cities where working conditions in factories were, in general, harsh and brutal, and living conditions were cramped, overcrowded and unsanitary. Industrial developments, known collectively as the 'Industrial Revolution', were driven initially by the harnessing of water and steam power, and the widespread construction of rail, shipping and road networks. Parallel with these changes, came the development of purchasing 'middle class', consumers. Various technological ripples (or waves of innovative activity) continued (worldwide) up to the early-twenty-first century. Of recent note are innovations in digital technology, with associated developments, for example, in artificial intelligence, robotics, 3-D printing, materials technology, computing, energy storage, nano-technology, data storage, biotechnology, 'smart textiles' and the introduction of what has become known as 'e-commerce'. This paper identifies the more important early technological innovations, their influence on textile manufacture, distribution and consumption, and the changed role of the designer and craftsperson over the course of these technological ripples. The implications of non-ethical production, globalisation and so-called 'fast fashion' and non-sustainability of manufacture are examined, and the potential benefits and opportunities offered by new and developing forms of social media are considered. The message is that hand-crafted products are ethical, sustainable and durable.

Optimization Methodology Integrated Data Mining and Statistical Method (데이터 마이닝과 통계적 기법을 통합한 최적화 기법)

  • Song, Suh-Ill;Shin, Sang-Mun;Jung, Hey-Jin
    • Journal of Korean Society for Quality Management
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    • v.34 no.4
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    • pp.33-39
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    • 2006
  • These days manufacture technology and manufacture environment are changing rapidly. By development of computer and enlargement of technique, most of manufacture field are computerized. In order to win international competition, it is important for companies how fast get the useful information from vast data. Statistical process control(SPC) techniques have been used as a problem solution tool at manufacturing process until present. However, these statistical methods are not applied more extensively because it has much restrictions in realistic problems. These statistical techniques have lots of problems when much data and factors are analyzed. In this paper, we proposed more practical and efficient a new statistical design technique which integrated data mining (DM) and statistical methods as alternative of problems. First step is selecting significant factor using DM feature selection algorithm from data of manufacturing process including many factors. Second step is finding optimum of process after estimating response function through response surface methodology(RSM) that is a statistical techniques

The Study of the Veneer Pretreatment with Aluminum Sulfate Solution on the Reduction of Urea Formaldehyde Resin Spreading Content for the Manufacture of Plywood (황산알미늄용액의 단판(單板) 전처리(前處理)에 따른 합판용(合板用) 요소수지(尿素樹脂) 도포량의 감소에 관한 연구(硏究))

  • Lee, Hwa-Hyoung
    • Journal of the Korean Wood Science and Technology
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    • v.16 no.1
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    • pp.3-8
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    • 1988
  • This study was carried out to examine the effect of pretreatment of veneer with aluminum sulfate solution for the manufacture of the kapur plywood on the reduction of urea resin spread. The results were as follows: 1. Specific gravities of plywoods made of the kapur veneers ranged from 0.83 to 0.84 and their moisture contents based on air dry weight showed from 10.6% to 11.4%. These met the Korean Industrial Standards. 2. In the case of dry shear strength for the 3rd class plywood, 40% reduction- spread met K S as well as normal urea resin spread. pH of the aluminum sulfate solution gave better result at pH 4.5 and pH 6 than at pH 3. For the manufacture of the 2nd class plywood, hot and cold water-wet shear strength show the best results at the following conditions; such as 20% reduction spread, pH 4.5 of aluminum sulfate solution and all veneer treatment.

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Study on the Activation of Adhesion for the Manufacture of the Wood Based Panel Products (목질판상제품제조(木質板狀製品製造)를 위한 새로운 접착활성화(接着活性化)에 관한 연구(硏究))

  • Lee, Hwa-Hyoung
    • Journal of the Korean Wood Science and Technology
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    • v.19 no.4
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    • pp.18-26
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    • 1991
  • This study was carried out to examine not only the effect and the process of activation of aluminum sulfate for the manufacture of PB and MDF, but also application of the activation treatment to PB and MOF made with MDI adhesive. The results were as follows: 1. For the manufacture of PB, activating effect did not take place Because the low moisture content of 30% in the process of activation treatment made probably insufficient activation. It needs to examine higher moisture content for the uniform and enough activation same as that of MOF. 2. In the case of MOF, Activating effect was excellent, it showed not only better results of MOR 48%, MOE 29%, IB 60% than those of the control but also better dimensional stability. 3. Application of alum activation to the PB and MDF made with MDI adhesive yielded no effects. Maybe it was the reson that the curing mechanism of MDI is different. 4. Modifing the wood surface was the oxidation and wettability was not the variable limiting glueline performance. It is necessary to make a more study about activating reaction.

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