• 방송공학회논문지
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• 제26권6호
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• pp.714-724
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• 2021

포인트 클라우드 콘텐츠는 실제 환경 및 물체를 3차원 위치정보를 갖는 점들과 그에 대응되는 색상 등을 획득하여 기록한 실감 콘텐츠이다. 위치와 색상 정보로 구성된 3차원 점으로 이루어진 포인트 클라우드 콘텐츠는 확대하여 렌더링 할 경우 점과 점 사이의 간격이 벌어지면서 빈 구멍이 발생하게 된다. 본 논문에서는 포인트 클라우드 확대 시 점들 간 간격이 벌어져 생기는 구멍을 찾고 구멍에 대해 깊이정보를 활용한 역 변환 기반 보간 방법을 통해 포인트 클라우드 콘텐츠 품질을 개선하는 방법을 제안한다. 영상의 확대나 카메라 근접 등으로 포인트들의 간격이 벌어지면 틈이 생기면서 구멍 사이에 뒷면의 포인트들이 렌더링 되어 보간 방법을 적용하는데 방해요소로 작용한다. 이를 해결하기 위해 포인트 클라우드의 뒷면에 해당하는 점들을 제거한다. 다음으로 빈 구멍이 발생한 시점의 깊이 맵(depth map)을 추출한다. 마지막으로 역 변환을 하여 원본의 데이터에서 픽셀을 추출한다. 제안하는 방법으로 콘텐츠를 렌더링한 결과, 기존의 크기를 늘려 빈 영역을 채우는 방법에 비해 렌더링 품질이 평균 PSNR 측면에서 1.2 dB 향상된 결과를 보였다.

• 대한토목학회논문집
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• 제14권2호
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• pp.291-298
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• 1994

본(本) 논문(論文)에서는 구속(拘束)된 ? 비틂상태에 있는 비대칭(非對稱) 단면형상(斷面形狀)에 제한(制限)이 없는 박벽(薄壁) 단면(斷面)보의 유한요소해석(有限要素解析)을 위한 새로운 탄성강도(彈性强度) 매트릭스를 제안(提案)한다. 유도(誘導)된 요소(要素)는 휨과 ? 비틂에 의한 영향(影響)을 고려(考慮)한다. 순수 비틂 강성(剛性)의 임의적인 첨가(添加)를 제거하기 위하여 본(本) 연구(硏究)의 $C^0$ 유한요소(有限要素)에서는 직각좌표계(座標系)에 근거한 가상(假想)일을 사용하였다. 유도(誘導)된 블럭 매트릭스의 효율성(效率性)에 대하여 비교분석(比較分析)한다. 또한 두개의 다른 기준시스템의 변환(變換) 매트릭스를 소개(紹介)한다. 제시(提示)한 블럭 매트릭스를 검증(檢證)하기 위하여, 수치예제(數値例題)들을 통하여 본(本) 연구(硏究)에 대한 결과(結果)와 엄밀해(嚴密解) 또는 다른 연구자의 결과(結果)들과 비교검토(比較檢討)한다.

• Asian Pacific Journal of Cancer Prevention
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• 제13권9호
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• pp.4235-4240
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• 2012

Objectives: Family caregivers (FCs) are often the primary source of social and emotional support for cancer patients and play a major role in how well they manage their illness. The aim of this study was to create an Turkish version of the Quality of Life - Family Version (QOL-FV) and to evaluate its psychometric properties in a sample of FCs of cancer patients. Materials and Methods: This study was carried out with the FCs of 218 patients with cancer. Data were collected with a Demographic Questionnaire and the QOL-FV and The Multidimentional Scale of Perceived Social Support (MSPSS). The QOL-FV was developed by Ferrell and Grant and is composed of 4 subdimensions. Linguistic validity, translation, back translation, and content validity were tested with expert opinions. Test-retest reliability, and internal consistency reliability were assessed. Construct validity was tested by factor analysis and with the scale of the MSPSS. Results: The family caregivers were between the ages of 46-56 (32.6%), a great number of them being male (52.8%). The scale is made up of four subdimensions. The result of the test-retest analysis of this scale was calculated as r:0.86. As a result of the reliability analysis, six items were eliminated from the scale, factor analyses were fulfilled according to varimax transformation through the method of principal components. Four new subdimensions were restrustured at the end of the analysis. The scale of Cronbach ${\alpha}$ coefficient was calculated as 0.90. Concurrent validity showed low correlations with the MSPSS (r=0.29). Conclusions: The QOL-FV, adapted into Turkish, was found to have sufficient reliability and validity.

• 복식
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• 제50권7호
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• pp.75-96
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• 2000

Modern clothing is approached in the level of art, and it becomes the means of expressing individuality in modern society uniformed by the development of information society. In this modern society, modern men need the recovery of humanity and expectations of handcrafted skills for the succession of tradition culture. Prior to expressing individuality, we should examine our traditional culture and combine it with western culture. Quit started to be used for practical purpose such as life items, but it is expanded to the fields of art. Used in dress and its ornaments design, quilt is often applied to the addition of aesthetic factors or cubic material feelings by transforming its warming effect. Hereby, this study has a purpose to create high value added modern dross and its ornaments design by expressing the modern clothing is approached in the level of art, and it becomes the means of expressing individuality roe-dimensional characteristics of quilt, and applying the color combination and the surface of butterfly wings to dress and its ornaments design. The following are the results of this study. 1. The concept of quilt started for practical purposes, but it is expanded to decoration in modern times, and it is confirmed that quilt can be variously applied to handcrafted modern design. 2. Quilt removes the plane character of textile and it riches the three-dimensional material of dress and its ornaments. Applying these characteristics, the expression of transparent wings were possible with 3 transparent layers of textile. 3. The spledid color of butterfly wings are expressed by coloring oganza and felt, and the various colors of felt showed rich color gradation. 4. The form and pattern of butterfly wings are applied as modeling form and line, and the transformation. repetition and expansion of unit forms determined the form of quilting lines. By designing the characteristics of back wings for the composition line of clothing, the form characteristics of a motif could be emphasized. 5. By using felt, oganza, Damdam yarn and ostritch feathers in expressing butterfly wings, the warm material of Linbun is felt, and the tip hair of wings are expressed by croche techniques using Damdam yarn.

• 한국컴퓨터그래픽스학회논문지
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• 제17권1호
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• pp.39-44
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• 2011

영상이나 동영상을 저장하거나 전송할 때 저장 공간의 크기나 네트워크 대역폭을 고려하여 고해상도 윈본 영상을 축소하여 저장, 전송하고 최종적으로 영상을 디스플레이 하는 과정에서 영상을 확대하는 경우가 실제 응용에서 빈번히 나타난다. 기존 연구들에서는 이런 경우 확대 영상의 화질을 개선하기 위해 영상 확대 과정을 개선하기 위한 연구가 많이 진행되었다. 본 논문에서는 이런 상황에서는 고해상도 원본 영상이 존재한다는 점에 착안하여 영상 확대 과정 대신 영상을 축소하는 과정을 개선함으로써 최종 확대 영상의 화질을 개선하기 위한 방법을 제안한다. 특히 실제 하드웨어나 소프트웨어에서 널리 적용되는 선행 보간법, 삼차 보간법 등에서 확대 영상의 화소가 작은 영상의 화소값들의 선형 조합으로 나타난다는 점에 착안하여 영상 확대 과정을 선형 변환으로 모델링하고 최적 축소 영상을 만틀기 위한 역변환을 얻는 방법을 제안한다. 또한 역변환 과정의 계산량을 줄이기 위해 역변환과정을 간단한 필터 커널로 근사하는 방법을 제안한다. 결과적으로 본 논문에서 제안하는 방법으로 축소한 영상을 확대 복원하였을 때 기존에 사용되던 방법에 비해 상당한 화질 개선 효과가 있는 것을 실험적으로 확인하였다.

• The Plant Pathology Journal
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• 제23권2호
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• pp.51-56
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• 2007

A plant pathogenic fungus, Gibberella zeae (anamorph: Fusarium graminearum), not only generates economic losses by causing disease on cereal grains, but also leads to severe toxicosis in human and animals through the production of mycotoxins in infected plants. Here, we characterized a histidine auxotrophic mutant of G. zeae, designated Z43R1092, which was generated using a restriction enzyme-mediated integration (REMI) procedure. The mutant exhibited pleiotropic phenotypic changes, including a reduction in mycelial growth and virulence and loss of sexual reproduction. Outcrossing analysis confirmed that the histidine auxotrophy is linked to the insertional vector in Z43R1092. Molecular analysis showed that the histidine requirement of Z43R1092 is caused by a disruption of an open reading frame, designated GzHIS7. The deduced product of GzHIS7 encodes a putative enzyme with an N-terminal glutamine amidotransferase and a C-terminal cyclase domain, similar to the Saccharomyces cerevisiae HIS7 required for histidine biosynthesis. The subsequent gene deletion and complementation analyses confirmed the functions of GzHIS7 in G. zeae. This is the first report of the molecular characterization of histidine auxotrophy in G. zeae, and our results demonstrate that correct histidine biosynthesis is essential for virulence, as well as sexual development, in G. zeae. In addition, our results could provide a G. zeae histidine auxotroph as a recipient strain for genetic transformation using this new selectable marker.

• 한국의상디자인학회지
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• 제12권3호
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• pp.93-103
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• 2010

The results of comparison and analysis of dynamical features according to Jacquard structure are as follows. Regarding elongation(E) value in tensile property, the value in the direction of course was found to be larger in all Jacquard structure, except floating Jacquard, than the direction of wale. It could be found that, as to bending strength(B) in Bending Property, the value of bending strength in the direction of course smaller in all the textile(structure) except floating than the direction of wale, so that the ability of curve formation is excellent. And in case of floating Jacquard, it showed the smallest value in the direction of course and wale, so that it was interpreted as Jacquard having a soft feel. Blister Jacquard showed the highest value in both directions of course and wale, so that it was evaluated as Jacquard having the hardest touch. With regard to shearing character(G) and shearing hysteresis(2HG) in Shearing Property, Jacquard indicated the lowest value, so it was evaluated as the textile(structure) having high drape the transformation of whose fabric is easy. In addition, normal Jacquard, transfer Jacquard, blister Jacquard showed a high value, so that it could be known they are Jacquards having stiff touch. The study implies that normal Jacquard, bird's eye Jacquard, etc., which well stretch in the direction of a course like tubular Jacquard course, is better to make the margin a little shorter than the basic margin, and Jacquard that well stretches in the direction of wale like ladder's back Jacquard and floating Jacquard is better to make the margin longer and the length shorter than the basic margin.

• 복식
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• 제58권4호
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• pp.47-57
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• 2008

Funology is a compound word with fun and technology which means the products or activity carrying fun and technology at the same time. This is one of the key words that can explain the culture of post-digital generation amongst the post-digital age. The purpose of this study was to provide the creative ideas to develop the fashion designs showing funology concept for the 21st century. As a background of funology trend, general ideas about the post-digital age and the post-digital generation were reviewed. First, funology designs among the industrial products and the funology concepts in the advertisement were examined. And the ways of expression and the meanings of funology fashion designs were extracted by analyzing funology fashion between 2000 S/S and 2008 F/W. The external expression ways of funology fashion in the post-digital age were as follows: parody of popular images, inharmony by the exaggeration or transformation, trompe l'oeil, mixture of the styles shown in the children's wear and the objects of children, patterns with childlike or animation characters, and the graffiti art. The internal meanings contained in the funology fashion were 1) fantasm showing surrealistic funology that was based on the people's pursue of fantasy free from the everyday's severe routine 2) memorism showing nostalgic funology that was based on the pursue of vanishing fear of reality and going back to the childhood. To sum up, fashions showing funology were expressed in various ways in the post-digital age. This will provide the great inspirations for creating the new coming fashions and efficient healing contents for the cold-hearted emotions of nowaday's people.

• 한국주조공학회지
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• 제32권2호
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• pp.104-108
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• 2012

The effect of heat treatment on mechanical properties of 0.4C-2.3Si(wt%) steel with bainitic ferrite matrix were investigated. This steel has been synthesized intergrating concepts from TRIP(Transformation Induced Plasticity) steel & Austempered Ductile Cast Iron(ADI) technology. The low alloy medium carbon (0.4 %C) steel with high silicon (2.3 %Si) was initially annealed for 60 min at $800^{\circ}C$, $820^{\circ}C$ and $840^{\circ}C$ respectively in the intercritical region and then subsequently austempered at various temperatures at $260^{\circ}C$, $320^{\circ}C$ and $380^{\circ}C$ for 30 min in a salt bath. The mechanical properties were measured by using a tensile test. A detailed study of the microstructure of this steel after heat treatment was carried out by means of electron back scattering diffraction (EBSD) technic. In this study, a new low alloy steel with high strength (780~1,050MPa) and exceptionally high ductility (20~40%) was obtained.

• 한국전기전자재료학회논문지
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• 제18권10호
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• pp.965-975
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• 2005

In the case of the fault in stator windings of a high voltage motor. it facilitates certain destructive characteristics in insulations. This will result in a decreased reliability in power supplies and will prevent the generation of electricity, which will result in huge economic losses. This study simulates motor windings using normal windings and four faulty windings for an actual fault in stator winding of a high voltage motor. The partial discharge signals produced in each faulty winding were measured using an 80 PF epoxy/mica coupler sensor. In order to quantified signal waves its a way of feature extraction for each faulty signal, the signal wave of winding was quantified to measure the degree of skewness shape and kurtosis, which are both types of statistical parameters, using a discrete wavelet transformation method for each faulty type. Wave types present different types lot each faulty type, and the skewness and kurtosis also present different quantified values. The result of feature extraction was used as a preprocessing stage to identify a certain fault in stater windings. It is evident that the type of faulty signals can be classified from the test results using faulty signals that were randomly selected from the signal, which was not applied in the training after the training and learning period, by applying it to a back-propagation algorithm due to the supervising and learning method in a neural network in order to classify the faulty type. This becomes an important basis for studying diagnosis methods using the classification of faulty signals with a feature extraction algorithm, which can diagnose the fault of stator windings in the future.