• 디자인학연구
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• 제11권1호
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• pp.259-268
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• 1998

본 연구의 목적은 앞으로 지속될 전통도구의 미적 체험에 관한 새로운 인식을 체계화하는데 있다. 아름다움의 이상을 실현하기 위한 노력은 시대와 사회를 막론하고 끊임없이 다양한 형태로 표출되었다. 서로 다른 문화권에서 각기 다른 언어가 사용되듯이 도구 또한 고유한 형태언어를 갖는다. 시각적 의사소통을 전제하는 도구의 형태언어 또한 고유한 어휘와 문법을 갖는다. 우리는 종종 언어의 코드가 일치하지 않는 상황에서 타 문화권의 사고방식과 행동특성을 충분히 이해하는데 어려움을 느끼는 것 처럼 이해의 상황이 준비되지 않고는 진실한 미적 체험에 도달할 수 없다. 도구형태의 미적 가치를 올바로 인식하기 위해서는 도구의 탄생과 진화를 추진해 온 상황과의 역학관계를 인식하여야 한다. 어느 문화권이나 시대를 막론하고 그들이 설정한 에토스에 가장 진실하게 접근하고 그것을 가장 진실하게 표출해 온 도구들은 오랫동안 우리에게 사랑을 받고 보존되어 왔다. 그것은 아름다움을 추구하는 여성의 의복이나 장신구와 같은 미적 대상 뿐 아니라 언어와 같이 그들의 공동체의식을 가장 잘 표현하고 전달할 수 있는 것이라면 시대와 정신이 바뀌어도 변함없는 가치를 발휘할 것이다.

• 한국인터넷방송통신학회논문지
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• 제15권3호
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• pp.25-33
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• 2015

양면을 뒤집어 입을 수 있는 Jacket처럼, 내부 및 외부 양 쪽 모두 호환이 가능한 행렬을 Jacket 행렬이라 한다. element-wise inverse와 block-wise inverse 과정을 통해 Jacket 행렬은 안 쪽 요소와 바깥쪽 요소 모두를 가진다. 이 개념은 1989년에 저자 중 한 명인 이문호 교수에 의해 이루어진 것으로서, 2000년에는 최종적으로 Jacket 행렬이라 부르게 되었다. 이것은 잘 알려진 Hadamard 행렬의 가장 일반적인 확장으로서, 직교와 비직교 행렬에 대한 성질을 포함하고 있다. Jacket 행렬은 정보 및 통신 분야 이론의 많은 문제들을 해석하는데 이용된다. 본 논문에서는 Jacket 행렬의 성질과 특성, 예를 들어 determinants와 eigenvalues, Kronecker product에 대해서 다룬다. 이 연산들은 신호 처리와 직교 코드 디자인에 매우 유용하다. 또한, 본 논문은 복잡성이 낮은 매우 간단한 수학적 모델을 통해 이들의 유용성을 계산한 결과를 제시한다.

• 한국안전학회지
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• 제28권3호
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• pp.44-50
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• 2013

Process gas piping is one of the most basic components frequently used in the refinery and petrochemical plants. Many kinds of by-product gas have been used as fuel in the process plants. In some plants, natural gas is additionally introduced and mixed with the byproduct gas for upgrading the fuel. In this case, safety or design margin of the changed piping system of the plant should be re-evaluated based on a proper design code such as ASME or API codes since internal pressure, temperature and gas compositions are different from the original plant design conditions. In this study, series of piping stress analysis were conducted for a process piping used for transporting the mixed gas of the by-product gas and the natural gas from a mixing drum to a knock-out drum in a refinery plant. The analysed piping section had been actually installed in a domestic industry and needed safety audit since the design condition was changed. Pipe locations of the maximum system stress and displacement were determined, which can be candidate inspection and safety monitoring points during the upcoming operation period. For studying the effects of outside air temperature to safety the additional stress analysis were conducted for various temperatures in $0{\sim}30^{\circ}C$. Effects of the friction coefficient between the pipe and support were also investigated showing a proper choice if the friction coefficient is important. The maximum system stresses were occurred mainly at elbow, tee and support locations, which shows the thermal load contributes considerably to the system stress rather than the internal pressure or the gravity loads.

• 한국의류산업학회지
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• 제24권1호
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• pp.117-126
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• 2022

This study aims to analyze the sizing information of women's ready-to-wear pants as indicated on online retail websites and to suggest better sizing communication that can assist customers in making successful apparel size selections. We gathered size specifications and size reference information for basic straight pants from 34 online apparel retail websites. Although the Korean standard recommends labeling the body dimension-based sizing code and specification, most websites preferred to use various types of sizing codes. Body measurements were only used by a few websites, and garment dimension descriptions were the most common method to indicate product size. Many websites provided size reference information through customer review boards and fit model images, however, there was insufficient body size information to allow customers to infer the fit of their body type. When using the size guidance tools, the major data input points were stature and weight measurements. However, the waist measurements of pants sizes guided only by stature and weight values revealed inconsistent ease allowance for corresponding body size populations, especially in the overweight group. Based on our findings, we propose a more effective method of communicating the size information of pants online. We expect that this will contribute to the efficiency of online apparel product display and build a better shopping environment that satisfies both sellers and consumers.

• 디자인학연구
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• 제18권2호
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• pp.27-36
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• 2005

상품을 팔기 위한 경제적 현상인 광고의 일러스트레이션은 일차적으로 상품내용을 전달하고자 소비자의 구매 욕구를 자극하기 위해 다양한 사회 문화적 코드를 사용하고 있다. 특히 현대사회에서 광고디자인은 대량생산을 통해 표준화된 상품을 차별화하기 위한 전략이드로 제품자체의 물리적 특징이나 사용가치 못지 않게 광범위한 상품외적 요소들인 사회학적 요인들이 개입하게 된다. 그 결과 상품판매 효과와는 상관없이 광고에 쓰인 문안이나 시각 이미지들이 독립된 사회적 영향력을 지니기도 하는데, 이러한 점에서 광고디자인은 시대상과 의식을 반영하고, 만들어 가는 공공의 문화적 현상이기도 하다. 그러므로 앞서 제시한 광고디자인의 특성과 역할을 전제로 본 논문은 근대기인 1900-1945년도의 한국과 중국의 광고포스터를 중심으로 당시 근대성의 성립과 전개를 개진한 시대상과 여성이미지의 관계를 고찰하고자 한다. 근대기의 한국과 중국이 서구화되면서, 광고 포스터에 등장한 여성이미지, 상품가치, 소비, 생활양식과 취향의 상관관계를 정치, 경제, 문화 현상 등을 광고일러스트레이션을 매개로 살펴보려고 한다.

• 한국측량학회지
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• 제21권1호
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• pp.37-44
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• 2003

본 연구는 l/5,000 수치지도 Ver 2.0을 이용하여 1/25,000 수치지도를 제작하기 위한 일반화처리공정을 개발하였다. 공간 및 속성정보를 포함하고 있는 수치지도 Ver 2.0은 기존의 수치지도 보다 많은 정보량을 포함하고 있기때문에 1/25,000 지청지물코드에 포함되지 않는 Layer를 삭제하고, 자료처리를 8대 지형·지물별로 분류하여 각각에 대해 처리한 후, merge 하는 과정으로 이루어지도록 적합한 작업공정을 도출하였다. 따라서, 본 연구에서 개발한 일반화 작업공정을 이용하므로서 향후 최적 자동일반화시스템을 개발할 수 있을 것이고, 소축척 수치지도 및 주제도 제작에 기여할 수 있을 것이다.

• Earthquakes and Structures
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• 제1권1호
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• pp.93-108
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• 2010

This paper investigates the seismic performance of existing reinforced concrete frames with wide beams mainly designed for gravity loads, as typically found in the seismic-prone Mediterranean area before the introduction of modern codes. The seismic capacity is evaluated in terms of the overall amount of input energy that the frame can dissipate/absorb up to collapse. This approach provides a quantitative evaluation that can be useful for selecting and designing an appropriate retrofit strategy. Six prototype frames representative of past construction practices in the southern part of Spain are designed, and the corresponding non-linear numerical models are developed and calibrated with purposely conducted tests on wide beam-column subassemblages. The models are subjected to sixteen earthquake records until collapse by applying the incremental dynamic analysis method. It is found that the ultimate energy dissipation capacity at the story level is markedly low (about 1.36 times the product of the lateral yield strength and yield displacement of the story), giving values for the maximum amount of energy that the frame can dissipate which are from one fourth to half of that required in moderate-seismicity regions.

• 한국전산구조공학회:학술대회논문집
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• 한국전산구조공학회 2008년도 정기 학술대회
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• pp.241-246
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• 2008

Design of a high-speed railway line requires collaboration of heterogeneous application systems and of engineers with different background. Object-based 3D models with metadata can be a shared information model for the effective collaborative design. In this paper, railway infrastructure information model is proposed to enable integrated and inter-operable works throughout the life-cycle of the railway infrastructures, from planning to maintenance. In order to develop the model, object-based 3-D models were built for a 10km railway among Korea high-speed railway lines. The model has basically three information layers for designers, contractors and an owner, respectively. Prestressed concrete box-girders are the most common superstructure of bridges. The design information layer has metadata on requirements, design codes, geometry, analysis and so on. The construction layer has data on drawings, real data for material and products, schedules and so on. The maintenance layer for the owner has the final geometry, material data, products and their suppliers and so on. These information has its own data architecture which is derived from similar concept of product breakdown structure(PBS) and work breakdown structure(WBS). The constructed RIIM for the infrastructures of the high-speed railway was successfully applied to various areas such as design check, structural analysis, automated estimation, construction simulation, virtual viewing, and digital mock-up. The integrated information model can realize virtual construction system for railway lines and dramatically increase the productivity of the whole engineering process.

• 한국인공지능학회지
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• 제5권2호
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• pp.26-42
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• 2017

This study perceived that there are limits to prompt and accurate monitoring when an accident occurs and the correct information of egg production stage, such as the date of spawning, cleaning, and refrigerating cannot be identified, since eggshell codes using barcode only show numbers identifying a city and province and the name of producers. To fix this problem, this study partially suggested the RFID (Radio Frequency Identification) technology and IoT-based Connected System. The proposed system in this study shares data with related agencies as the system of agricultural and livestock product information runs as the main server, and the database information of the proposed system is provided by farmhouses, distributors, and sellers. Through various media such as a webpage or mobile application built to provide the relevant information, customers can search and obtain information about agricultural and livestock products they want. Since the information on an entire process is open to the public, information ranging from simple to clear, additional ones such as hazardous elements can be viewed.

• 한국기계가공학회지
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• 제9권6호
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• pp.101-108
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• 2010

The drum clutch investigated in this study is formed in 5 forming steps, which are 1st deep drawing, 2nd deep drawing, restriking, embossing, and $Grob^{TM}$ processes. Dimensional accuracy of the final products greatly depends upon how much more accurate pre-form is manufactured in the previous forming processes before the $Grob^{TM}$ process. The deep drawing, restriking and embossing processes in which the pre-form is formed are very important and decisive steps. Thus in some cases, excessive strain by these operations causes dimensional inaccuracy and cracks initiated from the base and wall of the product. Process variables such as the punch shapes both of 1st and 2nd deep drawing, and punch angle were selected to evaluate the deformation characteristics. The optimum parameters were determined from forming simulations using commercial FEM codes, DEFORM and Tauchi method, specifically developed for metal forming simulation. Finally, experiments for the whole drum clutch forming processes were carried out to verify the optimized forming parameters and the analytical results.