• Composites Research
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• 제28권4호
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• pp.155-161
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• 2015

본 연구는 복합재료 구조물에 전기-기계 변환 기능을 융합한 센서-구조 일체형 복합재료 구조물 제작 방법에 관한 것으로 복합재료 구조물 자체가 센서 역할을 수행할 수 있도록 하여 구조 스스로 충격이나 진동 신호를 감지하고 손상 위치 또는 손상 정도를 실시간으로 모니터링 할 수 있는 다기능 복합 구조물에 관한 연구이다. 복합재 구조물에 전기-기계 변환 기능을 부여하기 위해 복합재 제작에 사용되는 에폭시 수지 대신 전기-기계 변환기능을 갖는 $Pb(Ni_{1/3}Nb_{2/3})O_3-Pb(Zr,\;Ti)O_2$ (PNN-PZT) 분말과 에폭시 수지를 1:30 wt% 혼합하여 제작된 스마트 수지를 사용하였다. Hand Lay-up 공법과, VARTM(Vacuum Assisted Resin Transfer Molding) 성형 방법을 이용하여 유리섬유에 스마트 수지를 함침시켜 센서-구조 일체형 복합재료 구조물을 제작하였다. 구조물을 센서로 사용하기위해 시편의 윗면과 아랫면에 전도성 도료를 사용하여 전극을 제작하였고, 고전압 앰프를 이용하여 상온에서 30분간 4kV/mm의 전계로 분극 처리를 수행하였다. 이후 충격망치를 사용하여 시편에 충격을 가했을 때 출력되는 전기 신호와 충격망치 신호를 비교하여 충격 신호 감응 및 감도를 측정하고 그 결과를 기술하였다.

• Computers and Concrete
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• 제4권3호
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• pp.167-186
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• 2007

Ductility based design of reinforced concrete structures implicitly assumes certain damage under the action of a design basis earthquake. The damage undergone by a structure needs to be quantified, so as to assess the post-seismic reparability and functionality of the structure. The paper presents an analytical method of quantification and location of seismic damage, through system identification methods. It may be noted that soft ground storied buildings are the major casualties in any earthquake and hence the example structure is a soft or weak first storied one, whose seismic response and temporal variation of damage are computed using a non-linear dynamic analysis program (IDARC) and compared with a normal structure. Time period based damage identification model is used and suitably calibrated with classic damage models. Regenerated stiffness of the three degrees of freedom model (for the three storied frame) is used to locate the damage, both on-line as well as after the seismic event. Multi resolution analysis using wavelets is also used for localized damage identification for soft storey columns.

• 한국의류산업학회지
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• 제13권1호
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• pp.7-16
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• 2011

Maximalism is the code which has a power to interpret a fashion phenomenon expressed complexly and variously in the multicultural society. In the 21st century, maximalism which reappeared is not the expression by a method only. It is presenting the experimental design for the new pursuit through the mixture such as expansion, splendor, variety, decoration, distortion of configuration or transformation, and composition. Therefore, this study aims at analyzing expression of fashion design by four types(expansion, decoration, mixture, non-structure) materializing a feature of maximalism expressed in the domestic and foreign collection works from 2005 to 2010. The research results are as follows. 1. Expansion: It was showed artificial, formative, unique, and odd teatures through the expansion of the upper half of the body, the lower half of the body, and both of them. 2. Decoration: It was showed the actual decoration considering functionality and practicality and the decoration emphasizing and unique character and featuring domination and emphasis. 3. Mixture: It was showed through the mixture of the contrary textiles or the different sex image. 4. Non-structure: It showed the non-structure of the avant-garde trend and non-structure through decoration, detail, adjustment direction of a dress.

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2014년도 추계학술대회 논문집
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• pp.273-276
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• 2014

The development of a vehicle-mounted radar to detect the location of enemy artillery is mainly mounted during operation to the mobility of the equipment and efficiency of utilization range. It is equipped with an electronic device responsible for the operation of the radar system. Electronic equipments is performed functionality imparted without an error-specific in spite of disturbances such as vibration / shock caused by vehicle movement. Therefore, vibration / shock resistance is held to prevent damaging from vibration / shock generated from the outside environment during operation. In addition, a standardized and specified cabinet structure equipped with electronic equipment is placed in shelter to ensure additional safety for vibration / shock. In this study, it is evaluated by analytical method with vibration / shock resistance of the cabinet structures for ensuring structural safety factor is applied to the aluminum. It is verified the reliability of the structure and structural dynamics to verify by calculated natural frequencies adding the weight of the cabinet structure and the structural displacement and stress results confirmed with vibration / shock caused by the vehicle movement.

• Geomechanics and Engineering
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• 제32권1호
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• pp.35-47
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• 2023

Deformability of road pavements in the form of ruts represent a safety risk for road users. In the procedures for dimensioning the pavement structure, the requirement that such deformations do not occur is imperatively included, which results in the appropriate selection of elements (material, geometry) of the pavement structure. Deformability and functionality, will depend of the correct design of pavement structure during exploitation period. Nevertheless, there are many examples where deformations are observed on the pavement structure, in the form of rutting at parts of the road with relatively short length, realised in the same climatic and the same geoenvironmental conditions. The performed analysis of deformability led to the conclusion that the level of deformation is a function of the speed of traffic. This effect is observed on city roads, but also outside of urban areas at roads with speed limits are significant, due to the traffic management, traffic jams (intersections, etc.). Still, the lower speed cause greater deformations. The authors tried to describe the deformability of flexible pavement structures, from the aspects of geotechnical problems, as a function of driving speed. Outcome of the analysis is a traffic load correction coefficient, in terms of using the existing methods of flexible pavement structures design.

• Steel and Composite Structures
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• 제51권3호
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• pp.289-304
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• 2024

The seismic performance of traditional steel frame-shear wall structures was significantly improved by the application of self-centering steel-reinforced concrete (SRC) wall-panel structures in the steel frames. This novel resilience functionality can rapidly restore the structure after an earthquake. The presented steel frame with steel-reinforced concrete self-centering wall-panel structures (SF-SCW) was validated, indicating its excellent seismic performance. The seismic design method based on bear capacity cannot correctly predict the elastic-plastic performance of the structure, especially certain weak floors that might be caused by a major fracture. A four-level seismic performance index, including intact function, continued utilization, life safety, and near-collapse, was established to achieve the ideal failure mode. The seismic design method, based on structural displacement, was proposed by considering performance objectives of the different seismic action levels. The pushover analysis of a six-floor SF-SCW structure was carried out under the proposed design method and the results showed that this six-floor structure could achieve the predicted failure mode.

• Molecules and Cells
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• 제27권6호
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• pp.681-687
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• 2009

We examined the effects of synthetic signal peptides, wild-type (WT) and export-defective mutant (MT) of ribose-binding protein, on the conformational changes of signal recognition particle 54 homologue (Ffh) in Escherichia coli. Upon interaction of Ffh with WT peptide, the intrinsic Tyr fluorescence, the transition temperature of thermal unfolding, and the GTPase activity of Ffh decreased in a peptide concentration-dependent manner, while the emission intensity of 8-anilinonaphthalene-1-sulfonic acid increased. In contrast, the secondary structure of the protein was not affected. Additionally, polarization of fluorescein-labeled WT increased upon association with Ffh. These results suggest that WT peptide induces the unfolded states of Ffh. The WT-mediated conformational change of Ffh was also revealed to be important in the interaction between SecA and Ffh. However, MT had marginal effect on these conformational changes suggesting that the in vivo functionality of signal peptide is important in the interaction with Ffh and concomitant structural change of the protein.

• BMB Reports
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• 제32권1호
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• pp.98-102
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• 1999

Since carbohydrates are major mediators in cell-to-cell adhesion and communication, the development of specific and strong binders against them could generate promising therapeutics. As the first step towards that goal, sugar molecules have to be immobilized to be used as an affinity matrix. The amino functionality in sugar is the most active nucleophile for the immobilization, if the amino group is available. An alternative and general method is to use the hydroxyl group as a direct nucleophile, but the quantitation of immobilized hydroxyl groups is not easily done. To overcome this limitation, we have developed a method to immobilize various isomers of monosaccharides with p-nitrophenyl groups to the beads by using their hydroxyl groups. It was found that the amount of immobilized sugar was independent of the structure of the sugar, but was dependent on the number of hydroxyl groups. We also developed a sensitive method to quantify the amount of immobilized sugar at the picomolar scale by utilizing commercially available glycosidases to release a sensitive reporter molecule, p-nitrophenol, and detect it by HPLC. This new technique would allow a facile quantitation method for immobilized sugar molecules, which could be used as the affinity matrix to develop strong binders against biologically important sugars.

• 복식
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• 제65권7호
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• pp.19-31
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• 2015

Futurists put forward creative fashion by combining art and functionality. This led to a new aesthetic approach in how we view modernized industrial cities. Ernesto Thayaht, a futurist, introduced the "Tuta", which was simple and practical clothes. Tuta expressed the imagination and aesthetic values of Futurism. The characteristics of the Tuta were categorized into the following: Form, Colors, Materials, and Details. The results of examining its characteristics as follows: Tuta had a linear and simple planar pattern, which could be made with one cloth. The same modernized urban colors were used for the top and the bottom. Practical Materials, such as cotton and linen were used because they were easy to wash. Tuta excluded unnecessary ornaments, and only included functional details that would allow for comfortable movement. These design characteristics of Tuta revealed functionality, popularity, modernity, and innovativeness of formativeness. Tuta presented a new model of fashion in the early 20th century and completed the modernization of clothes. Tuta reflected the democratic and equal spirit of the era by innovating and overcoming the structure and form of conventional clothing.

• 한국정보통신학회논문지
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• 제10권4호
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• pp.645-651
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• 2006

본 논문은 컴퓨터 시스템의 성능평가와 분석을 대칭구조의 멀티프로세서를 실행할 수 있는 시뮬레이터를 사용하여 살펴보았으며 또한 시스템 분석을 하는데 있어서 멀티프로세서를 위한 멀티프로그램 벤치마크의 집합체인 SPLASH-2를 이행하여 대칭구조의 운영체제 IRIX5.3 탑재한 멀티프로세서의 행위범위의 연구를 수행하기 위하여 멀티프로세서의 시스템 분석을 실시 하였다. 또한 대칭구조의 멀티프로세서의 구조와 평가방법을 보다 유효하게 하기 위해서 멀티프로세서의 확장성을 functionality-based 소프트웨어인 SimOS를 가지고 증명하였으며 본 논문을 통하여 멀티프로그램 벤치마크인 RADIX 정렬 알고리즘이나 Cholesky 인수분해 알고리즘을 이용하여 로칼 인스트럭션과 로칼 데이터 사이에서의 멀티프로세서의 Cache miss의 수 와 Stall 시간을 동시에 검사하였다.