• 제목/요약/키워드: Metal Pattern

검색결과 813건 처리시간 0.024초

동북아시아지역의 전통문양을 응용한 패션디자인 연구 - 한국, 중국, 일본의 16~19세기 복식을 중심으로 - (A Study on Fashion Design Applying Traditional Patterns in Northeastern Asia - Focusing on the Costumes of Korea, China and Japan in the $16^{th}-19^{th}$ Centuries -)

  • 김지현;간호섭
    • 복식
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    • 제59권9호
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    • pp.1-15
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    • 2009
  • This study aimed to create a new costume design suitable for publicizing our traditional patterns in the world by using the traditional patterns of Northeast Asia region. The result of this study can be summarized as follows. First, China is characterized by a strictly fixed configuration and a realistic description, Japan a simplistic modality and an abstract-geometrical pattern, and Korea a eclectic type, whole-pattern, and part-pattern. This study aimed to make the pattern by using harmoniously these characters. Second, Korea, China, and japan have many similarities concerning a symbolism and a type of pattern. In the modern fashion, they often use dragon patterns, various flower patterns like peony, plum blossom, or mum, and geometrical patterns. This study focused on expressing patterns which contain the ornamental symbolism of Oriental Look, aside from an existing symbolism, and show a traditional sentiment of Northeast Asia. The method for expressing traditional patterns usually included weaving, dyeing, embroidery, or gold foil. Although these methods have been used in all the three nations, even rubbed metal foil and patchwork have been widely used in Japan.

소경 공구를 이용한 고경도 패턴 금형의 고속 가공 (High speed machining of cavity pattern in prehardened mold using the small size tool)

  • 임표;장동규;이희관;양균의
    • 한국정밀공학회지
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    • 제21권1호
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    • pp.133-139
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    • 2004
  • High speed machining (HSM) can reduce machining time with the high metal removal rate by high speed spindle and feedrate. This paper supports HSM technology using the small size tool with the optimal tool path generation and modification of tool change. The optimum tool path is generated to reduce cutting length of cavity pattern and change the cutting tool for preventing the tool breakage by wear. The tool path is modified with the experiment data of tool wear and breakage to support tool change on reasonable time. The result can contribute to HSM technology of high hardness materials using the small size end-mill.

융합 필라멘트 제조 방식의 3D 프린팅을 이용한 X자 형상 내부 채움 패턴의 출력 옵션 변화에 따른 인장강도 연구 (A Study on Tensile Strength Dependent on Variation of Output Condition of the X-shape Infill Pattern using FFF-type 3D Printing)

  • 나두현;김호준;이용호
    • 소성∙가공
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    • 제33권2호
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    • pp.123-131
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    • 2024
  • Plastic, the main material of FFF-type 3D printing, exhibits lower strength compared to metal. research aimed at increasing strength is needed for use in various industrial fields. This study analyzed three X-shape infill patterns(grid, lines, zigzag) with similar internal lattice structure. Moreover, tensile test considering weight and printing time was conducted based on the infill line multiplier and infill overlap percentage. The three X-shape infill patterns(grid, lines, zigzag) showed differences in nozzle paths, material usage and printing time. When infill line multiplier increased, there was a proportional increase in tensile strength/weight and tensile strength/printing time. In terms of infill overlap percentage, the grid pattern at 50% and the zigzag and lines patterns at 75% demonstrated the most efficient performance.

천연가스 수송용 API 5L-X65강 용접부의 부식거동에 관한 연구 (A Study on Stress Corrosion Behaviors in Welded Zone of the API 5L-X65 Steel for Natural Gas Transmission)

  • 조상근;송한섭;공유식;김영대
    • 한국해양공학회:학술대회논문집
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    • 한국해양공학회 2004년도 학술대회지
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    • pp.401-407
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    • 2004
  • This study is on the constant-current stress corrosion test related to the load stress in welded zone and non-welded zone of high tensile strength steel for natural gas transmission. The surface corrosion pattern of the welded zone of API 5L-X65 specimens for natural gas transmission showed global corrosion and narrow pitting, and the pitting was increased by increasing the load stress. Initially, the average relative electrode potential and the average relative current of the high tensile strength steel for natural gas transmission specimens was decreased suddenly, and the average relative electrode potential was higher and the average relative current was lower in welded zone than base metal. and the average relative electrode potential was decreased by increasing the load stress, and the average relative current was somewhat increased by increasing the load stress. The corrosion rate was less in welded zone than base metal, and the corrosion rate was decreased by increasing the load stress.

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경상북도(慶尙北道) 일원(一圓)에 부존(賦存)하고 있는 금속지하자원(金屬地下資源)의 지질광상학적(地質鑛床學的) 연구(硏究) (Study on the Metal Ore Deposits of Gyeongsang buk-do Area)

  • 김영기;이재영;김상욱;고인석
    • 자원환경지질
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    • 제9권3호
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    • pp.143-156
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    • 1976
  • The Cretaceous metal ore deposits in the Gyeongsang basin of Gyeongsangbuk-do are characterized by the formation of metallogenic provinces which show zonal distribution pattern around Yeonil province where pneumatolytic type is dominated and hydrothermal type are distributed in the order of decreasing temperature type outward. Some Cretaceous granitic rocks include zoned alkali feldspars which reflect rapid variation of $H_2O$ during emplacement and crystallization of the water-saturated granitic magma. The ore deposits are considered to be originated from upward transportation of ore solution from the excess of water exhausted from uprising magma, which seems to be intimately related to the fact that the majority of the ore deposits in Daegu area are cummulated around the granites including zoned alkali feldspars. In order to collect geochemical data necessary for geochemical exploration in the study area, certain trace elements were chosen as pathfinders from monzonite and soil in the vicinity of Dalsung Tungsten Mine by studying the dispersion patterns of trace elements: Ba and Sr show trends to decrease toward ore deposit while Cu, Pb, and Mo increase. Around mining area there are distributed apparently Equisetum arvense Linne and Mentha sachinensis Kudo which may be used as index plants. In the viewpoint of geologic structure, the trends of the ore veins in contact aureole around the Palgongsan granite body correspond with the pre- and syn- plutonism joint pattern in hornfels in the area.

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MILC 성장 속도에 비정질 실리콘의 기하학적 형상이 미치는 영향 (The Effect of Geometric Shape of Amorphous Silicon on the MILC Growth Rate)

  • 김영수;김민선;주승기
    • 한국재료학회지
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    • 제14권7호
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    • pp.477-481
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    • 2004
  • High quality polycrystalline silicon is very critical part of the high quality thin film transistor(TFT) for display devices. Metal induced lateral crystallization(MILC) is one of the most successful technologies to crystallize the amorphous silicon at low temperature(below $550^{\circ}C$) and uses conventional and large glass substrate. In this study, we observed that the MILC behavior changed with abrupt variation of the amorphous silicon active pattern width. We explained these phenomena with the novel MILC mechanism model. The 10 nm thick Ni layers were deposited on the glass substrate having various amorphous silicon patterns. Then, we annealed the sample at $550^{\circ}C$ with rapid thermal annealing(RTA) apparatus and measured the crystallized length by optical microscope. When MILC progress from narrow-width-area(the width was $w_2$) to wide-width-area(the width was $w_1$), the MILC rate decreased dramatically and was not changed for several hours(incubation time). Also the incubation time increased as the ratio, $w_1/w_2$, get larger. We can explain these phenomena with the tensile stress that was caused by volume shrinkage due to the phase transformation from amorphous silicon to crystalline silicon.

음향방출 신호를 이용한 SWS 490A 고장력강의 접합성 평가에 대한 실험적 연구 (Experimental Studies on Joinability of SWS 490A High Tension Steel using Acoustic Emission Signals)

  • 이장규;우창기
    • 한국공작기계학회논문집
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    • 제14권3호
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    • pp.87-95
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    • 2005
  • The object of this study is to investigate the effect of joinability by using acoustic emission(AE) signals and doing a pattern recognition for weld heat affected zone(HAZ) in tensile testing. This study was carried out an SWS 490A high tension steel for electric shielded metal arc welding(SMAW), $CO_2$ gas arc welding and TIG welding. And correspondingly, the root openings are 3, 4 and 2.8mm. The results of the tensile test of weld HAZ come out electric shield arc welding $>\;CO_2$ gas arc welding > TIG welding in case of single welding. It is believed that this is a phenomenon where difference of its root opening or base metal thickness. Also, the technique of AE is ideally suited to study variables which control time and stress dependent fracture or damage process in metallic materials.

시간 지연 신경망을 이용한 음악 장르 분류 (Music Genre Classification using Time Delay Neural Network)

  • 이재원;조찬윤;김상균
    • 한국멀티미디어학회논문지
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    • 제4권5호
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    • pp.414-422
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    • 2001
  • 본 논문에서는 오디오 데이터의 효과적인 검색을 위하여, 시간지연신경망을 이용한 음악 장르 분류 시스템을 제안한다. 분류 대상 장르는 Blues, Country, Hard Core, Hard Rock, Jazz, R&B(Soul), Techno, Trash Metal의 8종류이다. 장르를 분류하기 위한 비교단위는 곡 중에서의 한 마디이다. 이러한 마디는 리듬의 특성을 효과적으로 반영하는 스네어 드럼 소리를 기준으로 추출한다. 분류기는 시간 지연 신경망을 이용하여 구성하며 입력은 추출된 마디에 대한 주파수 특징벡터이다. 제안한 시스템의 유효성을 검증하기 위한 실험에서, 장르별 10곡씩 총 80곡의 학습 데이터와 장르별 5곡씩 총 40곡의 테스트 데이터에 대하여 각각 92.5%와 60%의 정인식율을 보였다

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Fe-Cr-Ni강 용접금속부의 미세편석에 관한 해석 (Analysis of Microsegregation in Fe-Cr-Ni Weld Metal)

  • 박준민;박종민;안상곤;이창희;윤의박
    • Journal of Welding and Joining
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    • 제16권5호
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    • pp.56-66
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    • 1998
  • During solidification or welding of alloys, the solute redistribution brings out microsegregation. The microsegregation causes the formation of non-equilibrium second phases, shrinkage and porosity degrading mechanical/chemical properties Therefore, it has been required to predict microsegregation quantitatively. To predict the degree of microsegregation, more exact and appropriate computer simulation technique has been actively used during last two decades. To predict the degree of microsegregation in weld metal, an advanced two dimensional model was suggested. In the new model, both primary and secondary arm regions were defined for the analysis region. The growth in the primary arm regina was assumed to be a planar for effective calculation. Especially, for the growth of a secondary arm, a simple and effective mathematical function was established to show the growing pattern, the solute diffusion in the solid phase was calculated by finite difference method (FDM). The solid-liquid interface movement was considered to be in local equilibrium state. The experiments for welding of 310S stainless steel were carried out in order to examined the reasonability and feasibility of this model. The concentration profiles of the solute predicted by this model were compared with those obtained from experimental works.

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