• Title/Summary/Keyword: technical resources

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Effects of Stock Characteristics on Paper Bulk

  • Lee, Jin-Ho;Park, Jong-Moon
    • Proceedings of the Korea Technical Association of the Pulp and Paper Industry Conference
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    • 2006.06b
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    • pp.423-426
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    • 2006
  • Paper has fibers and fines network structure and it is strongly affected by interface bonding between fibers. Depending on the inter-fiber bonding, paper bulk is determined. Fines play an important roll in Campbell and consolidation effect through wet pressing and drying operations. Refined Sw-BKP, Hw-BKP and BCTMP fines were used to investigate the fines effect. Wet-web strength, breaking length, scattering coefficient, and hydrodynamic specific volume were measured. According to the result of experiments, chemical and morphological compositions of fines do not strongly affect to wet-web forming, but strongly affect to drying operations which form hydrogen bonding among fiber-fines-fiber matrixes. Paper bulk should be controlled by the extent of hydrogen bonding between fibers during drying operations.

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Fibers Flocculation and Physical Properties Changes of Paper Depending on Cationic Polymer Addition (양이온성 고분자 첨가에 따른 섬유의 응집 및 종이 물성 변화)

  • Yoon, Doo-Hoon;Park, Jong-Moon
    • Journal of Korea Technical Association of The Pulp and Paper Industry
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    • v.37 no.1 s.109
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    • pp.10-16
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    • 2005
  • Flocculation of fibers and its distribution in paper are related to flocculation mechanisms, retention and drainage. Relationship between flocculation mechanisms and physical properties of paper has not been fully studied. In this study, flocculation of fibers was investigated by changing cationic polymers for flocculation mechanism analysis. Flocculation of stock and physical strength of paper were similar when using branched PAM and linear PAM with fillers and microparticles Flocculation and physical strength were also similar when using branched PAM and linear PAM and microparticles without fillers. In that case excessive flocculation was not produced, so formation was improved but physical strength was decreased. When using branched PAM instead of linear PAM with filler addition, drainage time was decreased, air permeability was improved, and physical strength was increased.

A Case Study on Planning Factors and Technical Elements of the Environment-Friendly Apartment Complex in Korea and Japan (친환경주거의 계획 및 기술요소에 대한 한.일 사례비교)

  • 정유선;신수영;유복희;남규현;윤정숙
    • Proceeding of Spring/Autumn Annual Conference of KHA
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    • 2002.11a
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    • pp.215-221
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    • 2002
  • The purpose of this study is to accumulate basic data to establish planning direction and planning factors for the environment-friendly apartment complex by clarifying general concept and mark of it. For this purpose, the field study has been conducted to the environment-friendly apartment complex in Korea and Japan. The major findings of this study are as follows; 1) The basic concept of planning factors for environment-friendly apartment complex are natural harmony, improvement of residents' health & amenity, energy & resources saving and response to the social change. 2) For Japan, the planning factors and technical elements for the environment-friendly apartment complex were applied in the whole range of apartment complex with various and positive methods. For Korea, on the other hand, application of the planning factors of energy saving, resources saving and minimizing environment pollution was insufficient.

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A Comparative Investigation on Alkaline Peroxide Mechanical Pulp of Poplar Fast-Growing Clones and a Native Species

  • Ramezani, Omid
    • Proceedings of the Korea Technical Association of the Pulp and Paper Industry Conference
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    • 2006.06b
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    • pp.349-352
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    • 2006
  • The conventional pulping processes in Iran were reviewed in this paper. On account of forest resources restriction, a considerable extent of non-harvestable hardwood forests, the possibility of accessable non-wood resources and Poplar fast-growing species for using in pulp and paper industry was investigate. The cultivated area and abundance of each mentioned raw material (Wheat Straw, Sugarcane Bagasse, Poplars) were specified and the quality of their produced papers were compared in strength and opacity properties. Spruce species data was used for experiments comparisons. Regarding to environmental pollutions, low yield, inflexibility in wood and non-wood species resulted from the existent conventional processes of paper manufacturing, APMP is recommended due to high quality paper, desirable opacity properties, high yield and also the usage for all the raw materials.

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Towards cross-platform interoperability for machine-assisted text annotation

  • de Castilho, Richard Eckart;Ide, Nancy;Kim, Jin-Dong;Klie, Jan-Christoph;Suderman, Keith
    • Genomics & Informatics
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    • v.17 no.2
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    • pp.19.1-19.10
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    • 2019
  • In this paper, we investigate cross-platform interoperability for natural language processing (NLP) and, in particular, annotation of textual resources, with an eye toward identifying the design elements of annotation models and processes that are particularly problematic for, or amenable to, enabling seamless communication across different platforms. The study is conducted in the context of a specific annotation methodology, namely machine-assisted interactive annotation (also known as human-in-the-loop annotation). This methodology requires the ability to freely combine resources from different document repositories, access a wide array of NLP tools that automatically annotate corpora for various linguistic phenomena, and use a sophisticated annotation editor that enables interactive manual annotation coupled with on-the-fly machine learning. We consider three independently developed platforms, each of which utilizes a different model for representing annotations over text, and each of which performs a different role in the process.

Issues in S&T Human Resources Development in Korea

  • 고상원
    • Journal of Technology Innovation
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    • v.4 no.1
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    • pp.185-207
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    • 1996
  • It is frequently pointed out that the Korean economy, with its scarce natural resources, would never have been able to achieve current levels of economic development without the massive provision of well-educated, hardworking human resources. Throughout the industrialization process ,full-fledged deployment and mobilization of qualified human resources have been the foundation to industrial policy and S&T policy. This paper describes the development of S&T human resources in Korea using various statistics including educational enrollment rates, unemployment rates, the allocation of researchers and R&D expenditures among sectors of performance, educational composition of employment within and across industries, technical human resource shortage rates, relative wage levels of SMEs, and composition of labor force by age-group and gender. While analyzing S&T human resources development, this paper discusses issues such as the mismatched demand and supply of skill and knowledge levels of the highly educated, the unbalanced distribution of S&T human resources between sectors, and the low utilization of the female and aged labor force. This paper suggests that the policy maker applies a hybrid of quantitative and qualitative policies to reduce the mismatches of supply and demand of skill and knowledge levels for each labor market categorized according to supply side.

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