• Title/Summary/Keyword: Photocopy Paper

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A Study on the Usage of Industry & Technology Joumals (산업기술분야 학술지 이용에 관한 연구)

  • Kim, Suk-Young;Hwang, Hye-Kyong
    • Journal of Information Management
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    • v.31 no.4
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    • pp.13-49
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    • 2000
  • This paper describes the results of journals usage analysis conducted at the Korea Institute of Industry & Technology Information. The study covers the photocopy usage of journals during the past 5 years from 1995 through 1999. Analysis showed that 19% of journal collection met 93% of total demands. The Analysis also provided on journal use patterns. The most frequently used subject field of journals was Chemistry and Chemical Engineering. A relationship was found between rankings of journal as measured by the photocopy data and SCI journal citation ranking, however, no relationship was found between photocopy rankings of journal and rankings of journal impact factors.

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Changes of Recycled Paper Properties and Waste Paper Deinkability by the Repeated Recycling of Photocopy Paper (복사용지의 리사이클링 반복처리에 따른 재생지의 특성 및 고지의 탈묵성 변화)

  • Shin, Jun-Seop
    • KOREAN JOURNAL OF PACKAGING SCIENCE & TECHNOLOGY
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    • v.4 no.2
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    • pp.24-32
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    • 1998
  • This study examined the effects of recycling on chemical pulp fibers from multiple recycles. Firstly, water-pretreated alkaline photocopy paper was disintegrated by TAPPI standard disintegrator at room temperature. After dewatering, this pulp was dried in oven at $80^{\circ}C$ for 24hrs. A sequence of wetting, disintegrating and drying was one recycling cycle and this cyclic treatment was repeated from zero to five times. The recycled handsheet dropped to 90% of the original brightness after five cycles, and lost the most brightness in the first two cycles. However, it had a gain of 10% in opacity after five cycles. And, in this study, the method for determining residual ink(toner) content in recycled handsheets were estabilished by means of SEM-EDX and atomic absorptive photometer. The change of residual ink percentage on recycled paper showed the effect of recycling numbers on deinkability of waste paper. A slight decrease in deinkability was noted for the recycled handsheets, which may be due to the change of fiber surface free energy connected with fiber swelling.

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A Cost-Effectiveness Analysis on the Usage of Foreign Scientific and Technical Journals (과학기술분야 해외 학술지의 비용대 효과 분석)

  • 김석영;황혜경
    • Journal of the Korean Society for Library and Information Science
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    • v.35 no.1
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    • pp.249-264
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    • 2001
  • This paper describes the results of a cost-effectiveness analysis on the usage of foreign scientific and technical journals. In this study, the measure of cost-effectiveness chosen is the Cost Per Use(CPU) of a journal article. The photocopy usage data and annual subscription costs of journals subscribed by Korea Institute of Science & Technology Information were used. The results of this study illustrate that distribution of subscription cost and photocopy usage, Cost Per Use(CPU) of each journal, CPU of each subject field, etc. 80 percent of the demand for the journal was met by 40 percent of total subscription cost. A relationship was found between subscription cost and photocopy usage, however, no relationship was found between subscription cost and CPU.

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Distortion and Dilatatioin in the Tensie Failure of Paper

  • Park, Jong-Moon;James L. Thorpe
    • Journal of Korea Technical Association of The Pulp and Paper Industry
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    • v.31 no.5
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    • pp.73-85
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    • 1999
  • Yield and fracture are separated in the tensile failure of paper. Failure in the machine direction of photocopy paper is contrasted with failure in the cross-machine direction . The ratios of distortion (shape change) to dilatation (volume change) for individual elements at yield and fracture are described. The ratios of distortion to dilatation are measured and compared to predicted values of the strain energy density theory. To evaluate the effect of the angle from the principal material direction on the strain energy density theory. To evaluate the effect of the angle from the principal material direction on the strain energy density factor, samples are prepared from machine direction to cross-machine direction in 15 degree intervals. the strain energy density of individual elements are obtained by the integration of stress from finite element analysis with elastic plus plastic strain energy density theory. Poison's ratio and the angle from the principal material direction have a great effect ion the ratio fo distortion to dilatation in paper. During the yield condition, distortion prevails over dilatation . At fracture, dilatation is at a maximum.

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A Study on the Anti-copying method for hard copy documents (하드카피 복사방지기법에 관한 연구)

  • Lee Kang-Ho;Han Sung-Hyun
    • KSCI Review
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    • v.14 no.1
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    • pp.287-297
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    • 2006
  • This paper presents a new anti-copying methode for hard copy documents. The approach protects the document and its content from unauthorized copying and forgeries, while using ordinary paper and ordinary printer. The paper copy is protected against copying as the photocopy version will appear differently when compared to the authorized printed original hard copy. The anti-copying pattern created through pointillism with a halftone cell and a spot. The proposed method is useful for unauthorized copying and forgeries with high-resolution scanners and photocopiers.

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A Study on the Anti-copying method for hard copy documents using Human Visual System (인간시각시스템을 이용한 하드카피 복사방지기법에 관한 연구)

  • Lee Kang-Ho
    • Journal of the Korea Society of Computer and Information
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    • v.11 no.4 s.42
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    • pp.291-297
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    • 2006
  • This paper presents a new anti-copying methode for hard copy documents. The approach protects the document and its content from unauthorized copying and forgeries, while using ordinary paper and ordinary printer. The paper copy is protected against copying as the photocopy version will appear differently when compared to the authorized printed original hard copy using Human Visual System. The anti-copying pattern created through pointillism with a halftone cell and a spot. The proposed method is useful for unauthorized copying and forgeries with high-resolution scanners and photocopiers.

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THE EFFECT OF FILLERS ON THE DEINKING OF PHOTOCOPIED PAPER

  • Chen, Qing-min;Chang, Hou-min;Ethan K. Andrews;Heinz G. Olf
    • Proceedings of the Korea Technical Association of the Pulp and Paper Industry Conference
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    • 1999.11b
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    • pp.159-163
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    • 1999
  • Model experiments were conducted to investigate the effect of different fillers on the removal of toner ink. Combinations of different papers (commercial photocopy paper and filler-free paper), fillers (calcium carbonate, kaolin clay, and talc), and chemicals(1-octadecanol, stearic acid, oleic acid, and TOFA) and stearic acid were found to be effective in detachment and agglomeration of toner ink. Furthermore, pH had little effect on toner detachment and agglomeration, indicating both protonated fatty acids and their anions are equally effective. In the presence of either kaolin clay or talc, all these agglomerating agents are equally effective, although a slightly higher dosage(1% for clay and 2% for talc as compared with control) is required, presumably due to the adsorption of chemical by the filler. Calcium carbonate filler, on the other hand, has a significant and adverse effect on the fatty acids used but has little effect on 1-octadecanol with the exception of possible adsorption. While stearic acid is not effective, a much higher level of oleic acid or TOFA is needed when calcium carbonate fillers are present as compared to the filler-free case. Fatty acids react with calcium carbonate to form calcium salts. The availability of fatty acid anion for toner detachment and agglomeration is determined by the solubility of calcium salt of a given fatty acid. Calcium oleate is 10 times more soluble in water than calcium stearate.

A Study on Improvement of the Collection Development Strategy in the Sci-Tech Journals : Usage analysis from 1997/2002 (과학기술분야 학술지 수집전략 개선에 관한 연구 : 1997년/20 02년 원문이용 실적을 중심으로)

  • Joung, Hyun-Tae;Hwang, Hye-Kyong
    • Journal of Information Management
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    • v.34 no.4
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    • pp.85-107
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    • 2003
  • This paper describes the results of a usage analysis on the scientific and technical journals in order to optimize the collection development at KISTI. By comparing usage data for the journals from 1997/2002, this study identifies the short-term changes in journal use, which were shown on the subject field, language, publication country, SCI journal and electronic journal. The changing of journal use has important implications for collection development strategy in sci-tech libraries.

A Study on the Acceptance Requirements of an Original" Document and Copies under UCP 600 (UCP 600에서의 원본서류와 사본의 수리요건에 관한 연구)

  • Huh, Jae-Chang
    • THE INTERNATIONAL COMMERCE & LAW REVIEW
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    • v.38
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    • pp.123-152
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    • 2008
  • It is a basic rule in the credit law that original documents are required unless otherwise stipulated by the credit. Due to modern technology enabling documents to be produced in many ways it may not always to decide whether a document is original or a photocopy. In consideration of modern technology and the advent of new methods of document production, ICC has drawn up the provisions on original documents in Article 22 (b) of UCP 400 for the first time. The equivalent provision in UCP 500 is Article 20 (b). As a result of many queries to ICC Banking Commission on what constitutes an "original" documents under UCP 500 and several court cases in connection with original documents, the ICC Banking Commission has issued Decision on original documents in July 1999. Based on this Decision, the ICC dealt it in Article 17 under UCP 600 which came into force on July 1, 2007. There are some changes, replacements and new provisions of UCP 600 concerning original documents and copies. Importers, exporters, insurance companies, other third parties and, above all, banks should pay attention to some changes and implications of UCP 600 concerning original documents and copies. The purpose of this paper is to examine the provisions on original documents and copies under UCP 600. For this purpose, firstly this study deals with the relative provisions on original documents and copies under pre-UCP 600. Secondly this study considers the provisions on original documents and copies under UCP 600. Thirdly this study compares the provisions under pre-UCP 600 with the provisions under UCP 600. Finally this study analyzes the cases decided both home and abroad in connection with original documents. This paper contribute to help the parties to letters of credit to understand the provisions on original documents and copies under UCP 600.

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