워터제트를 응용한 섬유집합체 결합에 관한 연구 (I)-섬유결합의 메카니즘-

박태영,주창환,최영엽,Park, Tae-Yeong,Ju, Chang-Hwan,Choe, Yeong-Yeop 한국섬유공학회 1991 한국섬유공학회지 Vol.28 No.2

The effect of processing parameters on the structure and properties of hydroentangled nonwovens has been investigated for a newly designed nonwoven system, so called spunlace nonwoven process. Such a system is the nonwoven manufacturing process that empolys jets of wrote to entangle fibers and provides fabric integrity. Unlike the characteristics of general nonwovens produced by needle-punching, chemical bonding and thermal bonding methods, the outstanding characteristics of hydroentangled fabrics are soft, drape, comformability and relatively middle strength. In the present work, the hydroentangled fabric has been made with 100% ration and 50% rayon/50% polyester blended web and produced by this new system with different processing parameters such as pressure and injecting angle. We evaluated breaking stress of nonwoven fabrics and analysed to relate this property to nonwoven structure, i.e., aperture size, and aperture shape and fiber arrangement. Finally, an attempt is made to establish 'process-structure-property' relationship model to help engineering spunlace nonwovens for specific end-uses and to make optimum condition for the new water-jet fiber entanglement system.

한지의 인장특성 해석 (II) -실험적 고찰-

박태영,추창환,Park, Tae-Young,Joo, Chang-Whan 한국섬유공학회 2010 한국섬유공학회지 Vol.47 No.3

To evaluate the tensile behavior of Hanji, a preceding paper proposed a theoretical equation of the tensile properties of Hanji including some fiber factors and Hanji thickness. The theoretical values of the tensile strength of Hanji were compared with the experimental tensile strength. In the present work, the random-laid and parallel-laid Hanji sheets were prepared and the tensile behavior of Hanji tape yarn, 8 mm in width, was selected to measure the tensile strength of the fibers related to the fiber stress limit. By calculating all values of the fiber stress limit, curl factor, orientation distribution factor, Poisson's ratio, and two dimensional effects, the general pattern of the predicted breaking stress of Hanji was found to be slightly different from the experimental breaking stress. This difference was attributed to the lower calculated fiber strength than real value, and the difficulty in calculating the theoretical strain of the Hanji fiber at small deformation. Considering these facts, the results were used to assist in the engineering and manufacture of wet-laid nonwovens for specific end-uses.

워터제트를 응용한 섬유집합체 결합에 관한 연구(II)-공정 인자와 섬유결합력-

박태영,주창환,최영엽,Park, Tae-Yeong,Ju, Chang-Hwan,Choe, Yeong-Yeop 한국섬유공학회 1991 한국섬유공학회지 Vol.28 No.12

Hydroentangled nonwovens are alternatively called water-jet 'entangled' or 'spunlace' nonwovens. The hydraulic entanglement system is new technique for consolidating individual fibers in a web by means of high pressure water without the need for binder or/and other supplementary treatment. In recent, this system has been very interested in the field of nonwoven industry, since hydroentangled nonwoven fabrics have the patterned structure similar to woven fabrics and keep soft and drape characteristics. In this study, hydroentangled nonwovens have been made with 100% rayon and 50% rayon/50% polyester blended web and produced by a newly designed nonwoven system with different processing parameters. The manufacturing factors considered are injecting height, feeding speed, and passage number. Effect of processing parameters on the breaking strength of nonwovens has been investigated and it is compared with the morphological structure of nonwovens, i.e., aperture size and fiber density.

비대칭적 점프확산 모형의 효율적인 베이지안 추론

박태영,이영은,Park, Taeyoung,Lee, Youngeun 한국통계학회 2014 응용통계연구 Vol.27 No.6

자산가격의 비대칭적 변동을 설명하기 위해 최근 비대칭적 점프확산 모형이 제안되었다. 본 논문에서는 이러한 자산가격 모형을 분석하는데 사용되는 효율적인 베이지안 방법을 제안한다. 본 논문에서 제안되는 방법은 모형 요소가 쉽게 추출되는 편의성을 희생하지 않으면서도 조건부 분포들간의 함수적 비호환성을 통해 효율성을 향상시킬 수 있는 부분붕괴 깁스 샘플러를 고안함으로써 개발되었다. 제안된 방법은 모의실험 자료에 적용되어 그 효율성을 검증하였고 1980년 9월부터 2014년 8월까지 관찰된 일별 S&P 500 자료에 적용되었다. Asset pricing models that account for asymmetric volatility in asset prices have been recently proposed. This article presents an efficient Bayesian method to analyze asset-pricing models. The method is developed by devising a partially collapsed Gibbs sampler that capitalizes on the functional incompatibility of conditional distributions without complicating the updates of model components. The proposed method is illustrated using simulated data and applied to daily S&P 500 data observed from September 1980 to August 2014.

농업용 섬유제품의 개발동향

박태영,전한용,주창환,Park, Tae-Yeong,Jeon, Han-Yong,Ju, Chang-Hwan 한국섬유공학회 1995 한국섬유공학회지 Vol.32 No.11

무, 배추 및 고추종자의 분쟁사례연구

박태영,윤화모,민병훈,Park, Tae-Young,Yoon, Wha-Mo,Min, Byung-Hoon 배재대학교 자연과학연구소 1996 自然科學論文集 Vol.8 No.2

'농산종묘법'하에서 1968년부터 1970년 사이에 발생한 채소 종자분쟁은 177건 이었다. 이중 발아불량에 대한 종자분쟁은 46건(26%)으로 가장 많았으며 불량종자는 43건(24.3%), 수입종자에 대한 분쟁은 42건(23.7%) 이형주에 대한 분쟁은 27건(15.6%) 순이었다.'종묘관리법'하에서 모든 채소로부터 발생한 종자분쟁은 1976년부터 1995년 사이에 175건 이었는데 무가 53건(30%)으로 비교적 많았으며 배추 19건(11%), 고추 17건(10%) 순이었다. 무에서 발생한 종자분쟁의 유형은 추대(36%), 파종기불이행(21%), 순도불량(19%) 등이었으며 배추는 미량원소 결핍(27%), 발아불량(21%), 결구불량(16%), 병해(16%) 등이었고 고추는 착과불량(6%), 기형과발생(5%), 병해(3%) 등이었다. The Number of the disputes originated from vegetable seeds in 1968-1970 under 'Seed and Seedling Law for Agricultural Product)' was 177.: Poor germination was the major one (26% of total disputes), followed by inferior seeds(24.3%), imported seeds(23.7%), and off-type plant(15.6%).During 1976-1995, under 'Administrative Law for Seed and Seedling' the number of disputes originated from vegetable seeds was 175.: 53 in radish, 19 in Chinese cabbage, and 17 in pepper. The type of dispute originated from radish seeds was premature bolting(26%), differences in sowing data(21%), poor purity(19%), micronutrient deficiency(9%), root cracking and branching(9%), poor germination(4%), and damage by disease(2%). In Chinese cabbage, micronutrient deficiency was the major one(27%), followed by poor germination(21%), incomplete head formation(16%), damage by disease(16%), poor purity(10%), and bolting(10%). In pepper, poor fruit setting was the major one(6%), followed by malformed fruits(5%), damage by disease(3%), purity(2%), and poor germination(1%).

낙동강 델타 점토 지역 고속도로 확장공사 시 장기침하 영향 분석 및 대책 검토

박태영,이명석,이성렬,이사익,Park, Tae-Yeong,Lee, Myeong-Seok,Lee, Seong-Ryeol,Lee, Sa-Ik 한국지반공학회 2011 지반 : 한국지반공학회지 Vol.27 No.11

복합재료 사용 바닥판 부재의 응력집중부에 대한 피로성능 평가에 관한 연구

박태영,박준석,김두환,Park. Tai-Young,Park. Joon-Seok,Kim. Doo-Hwan 한국방재학회 2008 한국방재학회 학술발표대회논문집 Vol.2008 No.1

Recently the compound material has interested in using the structural material as the bridge member assembly. It is the lighter material against existing construction material and has excellent durability and economy. The existing floor of bridge has its short period to repair and replace compared to other parts of the bridge with the pavement and the shoe. These deteriorations of usage and safety by aging and corrosion are needed frequent maintenance. The use of compound material as a structural member suggests solve these problems. So this thesis evaluates the static and the fatigue performance for whether there are fiber lamination direction and stress concentration section of FRP floor plate, the compound material.

손상누적모델의 비교를 통한 플래퍼론 연결부의 피로수명 예측

박태영,박정선,Park, Tae-Young,Park, Jung-Sun 항공우주시스템공학회 2009 항공우주시스템공학회지 Vol.3 No.4

This paper deals with the lifetime prediction of Aircraft Flaperon Joint made of AISI 4130 steel. Reviews are performed on the published damage models at first. And three different damage models are used for predicting the fatigue life of the structure subjected to variable amplitude fatigue loading. These models require no increase in complexity of use, nor do they require additional material property or mission loading information to achieve the improved accuracy. Finally a comparison among the fatigue results is performed. It is observed that the Miner's rule could predict longer life than other cumulative damage models which take into account loads below the endurance limit.

스프레이접착제 부직포의 특성화 연구(I)-압축특성과 인장특성-

박태영,전한용,주창환,Park, Tae-Yeong,Jeon, Han-Yong,Ju, Chang-Hwan 한국섬유공학회 1996 한국섬유공학회지 Vol.33 No.4

Abstract : In a Spray-Bonded Nonwoven(SBN) system, small particles of adhesive bonding agent are applied to the fibrous layer in the form of a water dispersion. Since the characteristics of SBN are with bulkiness, highlight, good warmth and porosity, SBN is usually used as apparel padding, insulation, quilting flaterial and bedding. And so it is important to evaluate the compressional and tensile properties of SBN in considering application of end-use. From this fact, we have studied these properties of SBN made with different fibers, blend ratio, fabric weight and washing condition and found the facts as follows: (1) In preliminary study, heat treatments on the fabric surface are allowed SBN to be dense and full, and the compressional properties are dependent on the SBN structure with fiber characteristics, (2) The binder can not be readily penetrated onto the microflber web and its penetration is concerned with web thickness, (3) Blended binder fiber is a factor to increase the tensile strength of SBN, (4) For SBN before and after laundering, the compressional properties show a big difference for the SBN with microfiber and hollow fiber, and the tensile strength is generally decreased with increasing number of laundering.