• Proceedings of the SOHE Conference
• /
• 2003.10a
• /
• pp.77-77
• /
• 2003

본 연구의 목적은 후프(hoop)의 기원 및 변천과정을 고찰해보고 시대별로 후프의 유형을 분류한 후, 포스트모더니즘 이후 더욱 다양해진 후프가 현대패션에서 어떻게 응용되고 있는지를 살펴봄으로써 후프의 역사적ㆍ미적 가치를 재인식하여 오늘날 복식디자인에 창조의 영감을 줄 수 있는 하나의 모티브를 제시하는데 있다. 후프가 발생하였던 르네상스시대에는 신 중심에서 인간중심으로 사고가 변화하면서, 복식에 있어서도 인간의 신체미를 과시하려는 의도로 인체의 실루엣을 과장ㆍ확대하고자 하였다. 따라서 속옷의 중요성과 역할에 따른 심미적인 기능이 복식에 절대적으로 필요하였고, 뿐만 아니라 기교적인 면에서 속옷에 요구되는 장식성은 어느 시대보다 절실하였다. 그 결과 겉옷이 확대되고, 이에 따라 속옷도 인체를 크게 보일 수 있는 후프가 고안되었다. 후프는 스커트를 부풀리기 위해 철사나 고래뼈 등을 세공하여 만든 테를 넣은 속치마를 말한다. 16세기 중엽 스페인에서 유행한 종형의 파딩게일(farthingale)을 시초로, 영국과 프랑스에서는 드럼형의 휠 파딩게일(wheel farthingale)과 오쓰뀌(hausse col)가 유행하였다. 17세기 초기에는 후프를 착용한 16세기 복식이 유행하였으나, 1625년 이후 슬림한 스타일의 17세기 복식이 유행하자 후프의 착용은 점차 쇠퇴하였다. 18세기에는 파니에(panier)가 유행하여 옆을 부풀린 스커트의 실루엣을 형성하였고, 19세기에는 크리놀린(crinoline), 벗슬(bustle)이 유행하였다.

• Composites Research
• /
• v.33 no.3
• /
• pp.169-175
• /
• 2020

The compression and tension test were performed to evaluate the stiffnesses of the conical composite lattice structures and results of test were compared with finite element analysis results. Because of difficulty to perform simple tension and compression test due to conical shape, suitable specimens and jig for test were made. Subelements extracted from the structure were prepared for compression test. Compression test of subelement was performed and compressive strains in fiber direction were measured. Compressive stiffness of the helical rib was verified by finite element analysis results. For stiffness of hoop rib, hoop ring specimens were extracted from the structure. Tension test of hoop ring specimen was performed to apply bending deformation to hoop rib. Stiffness of hoop rib was verified by finite element model considering various fiber volume fraction in thickness direction.

• Journal of the Korea institute for structural maintenance and inspection
• /
• v.19 no.6
• /
• pp.1-9
• /
• 2015

Transverse steel bars are used in the plastic hinge zone of columns to insure adequate confinement, prevention of longitudinal bar buckling and ductile behavior. Fabrication and placement of rectangular hoops and cross-ties in columns are difficult to construct. Details of reinforcement for rectangular section require a lot of rectangular hoops and cross-ties. In this paper, to solve these problems, the new lateral confinement method using oblong hoop is proposed for the transverse confinement of the flared column. It can be the alternative for oblong cross-section and flared column with improved workability and cost-efficiency. The final objectives of this study are to suggest appropriate oblong hoop details and to provide quantitative reference data and tendency for seismic performance or damage assessment based on the drift levels such as residual deformation, elastic strain energy. This paper describes factors of seismic performance such as ultimate displacement/drift ratio, displacement ductility, response modification factor, equivalent viscous damping ratio and effective stiffness.

• Proceedings of the Korea Society for Energy Engineering kosee Conference
• /
• 1995.05a
• /
• pp.173-178
• /
• 1995

Hoop Energy Storage System(HESS) for electric power utility were discussed laying primary stress on the diurnal load leveling of Korean electric power system. A number of potential storage technologies are outlined and possibility for real application of HESS was suggested. Primary system variables were determined on the basis of state of electric power demand-supply of 1994. As a prerequisite technology for HESS, noncontacting support using magnetic pressure and high power conversion were discussed.

• 발명특허
• /
• v.31 no.1 s.355
• /
• pp.63-63
• /
• 2006

• Composites Research
• /
• v.31 no.4
• /
• pp.161-170
• /
• 2018

Cylindrical composite lattice structures are manufactured by filament winding process. The fiber volume fraction non-uniformity and resin rich layers that can occur in the manufacturing process affect the stiffness and strength of the structure. Through the cross-section examination of the hoop and helical ribs, which are major elements of the composite lattice structure, we observed the fiber volume fraction non-uniformity and resin rich layers. Based on the results of the cross-section examination, the stiffness of the ribs was analyzed through the experimental and theoretical approaches. The results show that the fiber volume fraction non-uniformity and resin rich layers have an obvious influence on the rib stiffness of composite lattice structure.

• Journal of the Korea institute for structural maintenance and inspection
• /
• v.18 no.3
• /
• pp.58-68
• /
• 2014

Transverse steel bars are used in the plastic hinge zone of columns to insure adequate confinement, prevention of longitudinal bar buckling and ductile behavior. Fabrication and placement of rectangular hoops and cross-ties in columns are difficult to construct and require larger amount of transverse steels. In this paper, to solve these problems, the new lateral confinement method using oblong hoop is proposed for the transverse confinement of columns of the oblong cross-section and flared column. The experimental study for octagonal oblong cross-section was carried out by the flared columns test in strong axis. The lateral confinement method using proposed oblong hoop detail showed satisfactory performance of lateral confinement. Therefore it can be the alternative for oblong cross-section and flared column with improved workability and cost-efficiency.

• Journal of Korea Multimedia Society
• /
• v.2 no.2
• /
• pp.129-136
• /
• 1999

A linear feature often provide sufficient information for image understanding and coding. An objective of the research reported in this paper is to develop and analyze the reliable methods of extracting lines in gray scale images. The Hough Transform is known as one of the optimal paradigms to detect or identify the linear features by transforming edges in images into peaks in parameter space. The scheme proposed here uses the fuzzy gradient direction model and weights the gradient magnitudes for deciding the voting values to be accumulated in parameter space. This leads to significant computational savings by restricting the transform to within some support region of the observed gradient direction which can be considered as a fuzzy variable and produces robust results.

• Proceedings of the Korean Society of Propulsion Engineers Conference
• /
• 2011.11a
• /
• pp.472-476
• /
• 2011

This paper presents the results of theoretical analysis and experimental test to verify the size effect on the fiber strength of filament wound pressure vessel. As a test method, a series of fully scaled hoop ring tests with filament wound carbon fiber-epoxy has been conducted. Test results showed remarkable size effect on fiber strength. And, as an analytical method, the WWLM(Weibull weakest link model) and SMFM(sequential multi-step failure model) were considered and compared to hoop ring test data. The analysis results showed significantly lower fiber strength value than that of test data. Through the modification of length size effect, modified SMFM is suggested. The fiber strengths from modified SMFM showed good agreement with test data.

• Composites Research
• /
• v.24 no.5
• /
• pp.1-8
• /
• 2011

This paper presents the results of theoretical analysis and experimental test to show the size effect on the fiber strength of filament would pressure vessel. First, a series of fully scaled hoop ring tests with filament would carbon-epoxy were conducted, which exhibited a remarkable size effect on the fiber strength. Next, the failure analyses using WWLM(Weibull Weakest Link Model) and the SMFM(Sequential Multi-step Failure Model) were performed and compared to the hoop ring test data, as well as to unidirectional specimens test data from the literature. It was found that the analysis results significantly underestimated the fiber strengths compared to the test data. In this study, a modified SMFM was proposed through the modification of the length size effect. The fiber strengths from modified SMFM analysis showed good agreement with the test data.