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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
231

Automatic fibre length measurement by image analysis

Clay, G. A. January 1988 (has links)
No description available.
232

The study of retention and function of C-14 labelled cationic and non-ionic starch in paper

Au, C. O. January 1987 (has links)
No description available.
233

Paper as a Visual and Tactile Organizational Material for Use on Schoolroom Bulletin Boards

Rodgers, Alice Louise 08 1900 (has links)
The purpose of this thesis is to show the useful characteristics of a wide variety of papers as applied to the preparation of a tactile and visual organization on a number of wallboards. It is hoped the wide variety of papers and techniques used will be inspirational to other teachers when creatively planning their own designs using paper as their art medium.
234

Studies on pigment fractions produced by Serratia marcescens Bizio

Poerio, Joseph. January 1959 (has links)
Call number: LD2668 .T4 1959 P65
235

The design of a paper waste handling system.

Kroonstuiver, Jacob January 1993 (has links)
A project report submitted to the Faculty of Engineering, University of the Witwatersrand, in partial fulfilment of the requirements for the degree of Master of Science in Engineering. / The design of a waste handling system is closely related to the functioning of the manufacturing system that it serves. The study considered the design of a waste handling system at the factory Printpak Gravure in Industria. The system in use was considered cost inefficient, The system was examlned, operating variables were determined, A model of the system was constructed so that the effectiveness of alternative systems could be compared. The replacement system selected reduced machine downtime and resulted in a lower yearly operating cost. / Andrew Chakane 2018
236

A survey of the cylinder machine boxboard industry

Rohde, Charles N. January 1965 (has links)
Thesis (M.B.A.)--Boston University / PLEASE NOTE: Boston University Libraries did not receive an Authorization To Manage form for this thesis or dissertation. It is therefore not openly accessible, though it may be available by request. If you are the author or principal advisor of this work and would like to request open access for it, please contact us at open-help@bu.edu. Thank you. / 2031-01-01
237

Numerical Study of Highway Noise Barrier Effects on Pollutant Dispersion

Liyuan Gong (5930975) 16 January 2019 (has links)
Roadside noise barrier helps to reduce downwind pollutants concentration from vehicle emission. This positive characteristic of the construction feature can be explained by its interaction with flow distribution and species transportation. In this thesis, 3-D numerical model has been developed to simulate highway pollutant transportation - realizable k-e model was employed to model turbulent flow; non-reaction species dispersion was applied to simulate species transport. First, numerical models were validated with experimental data. Good agreement was observed. Then detailed simulations were conducted to study double barriers’ effects on highway pollutant dispersion under different settings: noise barriers with different heights, noise barriers with and without edge effects, different atmospheric thermal boundary conditions. Results show that: (1) Noise barrier feature helps reduce downwind pollutant concentration. For 4m tall double barriers without edge effect case, 80% less concentration can be found than non-barrier case at downwind 100m; (2) Reduction of concentration increases as barrier height increases. 1m higher can lead 0.002 more concentration reduction at ground level. (3) Unstable condition has the least concentration and stable condition has the highest concentration at the same location. (4) Barrier with edge effect has higher concentration than barrier without edge effect downwind; (5) Oblique wind condition enlarges barrier edge effect. The larger the oblique angle is, the higher turbulence intensity can be found near barrier edges. These findings will be provide valuable input to noise barriers design so as to improve roadside neighborhood air quality.
238

Industrial dynamics and technological structure of the paper and pulp industry

Cruz-Novoa, Alfonso January 2011 (has links)
This thesis investigates the existence and form of association between the technological structure of one of the most highly capital-intensive industries in the world, the paper and pulp (p&p) industry, and its dynamic behaviour in terms of market growth and development. Industrial structure issues are particularly relevant in highly capital-intensive sectors because they reflect the influence of economies of scale and changing patterns of entry and exit. The thesis draws upon two related bodies of literature: the dynamics of industrial structure, and heterogeneity within industry. It uses a quantitative hypothesis-deductive method and two panel databases. The first of these databases identifies key characteristics of the world's 150 largest p&p firms during the period 1978-2000, accounting for two-thirds of world output. The second dataset contains annual production capacity for the entire population of US p&p companies during the period 1970-2000. The US is the largest producer and consumer of p&p, accounting for one-third of world output. The main findings are as follows. Firstly, we demonstrate that p&p firms' growth is not a 'random walk' process, a generalization referred to in the literature as Gibrat's law. Nor is there a linear relation between growth and size distribution or between time and growth rates. We find that size, technology and time matter. Secondly, we demonstrate that this departure from Gibrat's law is due to the existence of three distinctive technological configurations or strategic groups of firms: 'Large & Diversified', 'Medium & Specialized', and 'Small & Very Specialized', which show persistently heterogeneous growth performance. In contrast with the findings in most of the recent empirical literature that shows smaller firms growing faster within the industry size distribution, the medium & specialized p&p companies show systematically the highest rates of growth. Thirdly, patterns of p&p firm survival and technological adoption behaviour over the last three decades are identified and related to the principal technological advances during the period, i.e. the very rapid increase in paper machine operating speed. The research contributes to the literature by providing robust new empirical evidence of the persistence over time of an intra-industry technological structure that systematically influences the heterogeneous performance of firms with different technological configurations and whose origins are linked to firms' growth processes (industrial dynamics) in the p&p industry.
239

The Feasibility of Pulp and Paper Production in Utah

Meyer, Thomas 01 May 1968 (has links)
The objectives of this study are: l. To determine the adequacy of markets for paper products. 2. To identify and quantify the costs of the factors affecting pulp and paper production. The available information indicates that adequate markets exist for paper produced in Utah. Chemicals, water, labor, and power are available at costs low enough not to prohibit pulp and paper production. An adequate, low priced supply of wood could be purchased from the United States Forest Service. Intermountain and national paper markets would enable a paper producer in Utah to take advantage of lower comparative transportation costs.
240

Pulping qualities of refractory vs. permeable douglas-fir heartwood /

Blackman, Gary Lee. January 1970 (has links)
Thesis (M.S.)--Oregon State University, 1970. / Typescript. Mounted photographs. Includes bibliographical references (leaves 64-69). Also available on the World Wide Web.

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