A novel method for evaluating the anisotropy of the deterministic features in a stochastic 2D data is introduced. The ability of the wavelet transform for the identification of the abrupt discontinuities could be used to characterize the boundary of the deterministic area in a 2D stochastic data, such as flocs in paper structure. The one-dimensional wavelet transform with a small-scale range in MD and CD could quantify the amount of the edge in both directions, depending on the intensity of each floc. The flocs that are aligned in the MD direction result in a higher value of local wavelet energy in the CD direction. Therefore, the ratio of the total wavelet energy in CD and MD directions can be used as a new anisotropy index. This index is a measure of the floc-orientation and can provide an excellent tool to obtain the orientation distribution and the major oriented angle of flocs. Various simulated images and real stochastic data such as local gloss variation of printed image and formation image, have been tested and the results show this analysis method is very reliable to measure the anisotropy of the deterministic features.

It is very difficult to export the fresh agricultural products to long distant countries such as America and EU without any damage. Fresh exporting products would be met very hazardous environments such as hot and cold weather, heavy trembles with rolling and pitching. Therefore, care should be taken on tight fastening the products inside the container and keeping the designated temperature and relative humidity. The physical strength of outer box should be applied differently because each agricultural product has its own character for packaging. There have been many agricultural products researches for export packaging to the U.S.A. so far. However they have never got desirable results which enough to apply it in real. The main purpose of this research is to develop optimum compressive strength of corrugated fiber board box which would be used to American export packaging of fresh agricultural products such as perilla leaves, green red pepper and spinach.

초지와 인쇄시의 지절은 생산성 또는 운전성의 저하를 야기하므로 최소화해야 한다. 지종에 따라 초지조건이 달라지므로 종이에 가해지는 인장력, 함수율, 초지속도 등을 고려해야 한다. 종이에 있어서 결점 부근에서 일어나는 항복(yield)과 파괴현상을 파괴역학적 관점에서 연구한 바 있다. 초지공정은 섬유 매트 또는 습지에서 점차적으로 수분이 제거되는 과정이며, 인쇄공정은 종이에 물이 가해지는 과정이 있으나, 파괴인성 측면에서 동일한 이론을 적용할 수 있다. 박과 이는 초지시 섬유의 특성, 미세분의 종류 및 함량에 따른 인장 특성 및 파괴 특성에 관한 연구에서 Sw-BKP의 경우 섬유의 파괴가 유도되고, Hw-BKP의 경우 결합면의 파괴가 유도되는 것으로 나타났으며, 미세분 특성에 따른 시험 결과 파괴 인성은 섬유간 실제적 결합이 유도되는 경우 파괴 인성의 향상을 가져올 수 있는 것으로 나타났다. 파괴 역학은 결점 부위의 응력집중 현상에 따른 독특한 파괴 거동으로 지합등과 같은 응력 확산 효과를 기대할 수 없기 때문에 섬유간 실제적인 결합에 직접적으로 의존한다고 할 수 있다.

Newsprint is quantitatively the most important printing paper. The demands for its printability are continuously increasing. It is well known that the relationship between the physically tested paper properties and newspaper printability is unsatisfactory. In order to improve the printing quality of Korean newsprint, the printability coefficients such as maximum ink requirement($Y_{max}$), print through were investigated. Kinds of Korean newspapers and three kinds of news printing inks were tested by IGT printability tester. Experiment condition of IGT printability tester was 14 steps between $0.2{\sim}2.8g/m^2$ of ink requirement, printing pressure was .200 N and printing velocity was 1m/sec. The properties of newspaper samples(basis weight, bulk density, roughness, smoothness, porosity, i. e.) were examined in accordance with KS and TAPPI standard testing methods. The result of this study are respected for usefulness printing quality management of Korean newsprint.

목재자원의 부족과 천연물 가공시 부산물의 재활용 등 다양한 이유로 적용되는 비목재 펄프류의 섬유 성상과 특성은 최종 제품의 품질과 그 가공 공정등에 지대한 영향을 끼치게 된다. 이를 위하여 본 연구에서는 화상분석을 통한 비목재 펄프의 섬유성상 분석 방법을 모색하였고, 실제 다양한 성상의 담배 부산물을 그 원료로 제조되는 종이형태의 재구성 담배인 판상엽 제품의 구성성분 분석에 적용하여 그 적용 가능성을 평가하였다.

This study was performed to introduce recently developed Polyvinylamine as a wet-end process improving aids and paper properties improving aids. As a retention and drainage aids, cationicity of Polyvinylamine was a very important factor of BCTMP and ONP stock condition. As a dry tensile strength aids, The hydrogen bond of acrylamide functionality and hydroxyl functionality of the pulp was a very important factor of LBKP stock condition and cationicity of Polyvinylamine was a very important factor of BCTMP and ONP stock condition.