NC State

1981 Volume 1

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  • Proceedingpp 3-17AbstractPDF

    This paper starts by considering the factors that determine fashions in fundamental scientific research in the field of physics and discusses the interaction of such research with industrial needs. It emphasises the importance of pure research both within industry and outside and suggests that this should be regarded by industrial accountants as an issue of ‘enlightened self interest’ for industry itself.

  • Proceedingpp 19-33AbstractPDF

    A living system however primitive, must include mechanisms for conservation as well as for variation of genetic information and for its adaptation to optimal phenotypic performance under given environmental conditions.

    In order to maintain such a state of optimal performance the system has to metabolise steadily energy-rich material thereby remaining in a (meta-) stable ‘far from equilibrium’ position. If such material prerequisites are fulfilled ‘life’ should emerge inevitably as a ‘regularity among material events’ and such a regularity, if it exists, should be testable under laboratory conditions.

    Virus replicases have been shown to provide efficient mechanisms for assembling de novo macromolecular RNA-templates from energy-rich monomeric precursors and for adapting them quickly to optimal self-reproductive performance. With the help of such systems the theory of molecular self-organisation (e.g. the quasi-species model) has been tested quantitatively. The experiments, in particular, have addressed the question “first template – first enzyme?” including adaptation of target and source function of the genotypes. A machine is described in which experiments on self-reproduction and translation can be carried out in a continuous and systematic way. Questions regarding the origin of life can thereby be scrutinised by experimental falsification.

  • Proceedingpp 35-48AbstractPDF

    The mechanical properties of fibrous composite materials will be reviewed. Such materials are made, either in order to realise in practice the properties of the fibres, or else in order to increase the toughness of a matrix. The mechanical principles governing the interaction of fibre and matrix will be sketched and up to date examples of the properties of both types of composite given.

  • Proceedingpp 49-63AbstractPDF

    The author deals with the complex relationships which can, or should, exist between fundamental and applied research, and discusses the ways in which healthy relationships can contribute significantly to a Nation’s economic growth. The author concludes that the traditional classification of research as either fundamental or applied may interfere with the development of the healthy relationships required. He suggests an alternative model, based upon distinctions between intrinsic and extrinsic motivation of the research activity.

  • Proceedingpp 67-76AbstractPDF

    Considering the very small amount of fundamental research, that is to say scientific investigation conducted with no particular objective, carried out in the past in the subject of pulp and paper, it is pointless to try to discuss its impact. If, however, the term is widened to include orientated research, then it becomes possible to elucidate its impact on breaks-through in pulping.

    Numerous examples are presented to illustrate the relative importance of fundamental research in the achievement of technological breaks-through in such areas as outside chip storage, carbohydrate stabilising additives in alkaline cooking, delignification promoting additives in alkaline cooking, twostage sulphite cooking, oxygen bleaching, displacement bleaching, and steam drying.

    The findings indicate that empirical experimentation as well as the artistic combination of existing knowledge, often from different disciplines, has been most effective in bringing about technological breaks-through. Fundamental research has also been quite effective when it has been directed towards the attainment of a specified objective. It seems to have been least effective when it has been primarily either explanatory, to set a recent finding in its proper background, or repetitive, to discover how a finding made elsewhere can be applied to local conditions.

    All high quality fundamental research will give rise to new data for relevant system properties, and to new models representing the best available descriptions of the systems under consideration. This helps others to make future technological breaks-through, perhaps through empirical approaches, but often through the proper combination of knowledge from various fields.

    The technical strength as well as the competitiveness of the industry will in the future, as in the past, be strongly dependent on the extent and effectiveness of the research which is undertaken. It is therefore essential for the future of the pulp and paper industry that R & D activity be maintained at a very high level.

  • Proceedingpp 77-103AbstractPDF

    A subjective evaluation of the role of fundamental research in the manufacture of paper over the past 25 – 30 years traces the roots of some important inventions back to fundamental research endeavors. During this time, technical progress in paper manufacture has been both rapid and multifaceted. Fundamental research in relevant areas has resulted in higher productivity, improved process and product control, and better design of the paper-making process and the associated equipment.

    These improvements clearly indicate an important role for collective efforts, guided by ‘far-sighted industry leaders, in the area of fundamental research. The assignment of scientists by industry leaders to carry out this research in areas recognised as bottlenecks to technical development appears to have led to many of the important developments. Because improvements to the paper-making process are expected to yield returns to the paper industry, the responsibility for initiating, funding, and guiding fundamental research in appropriate areas must rest with the paper industry.

    Symposia of a fundamental nature have been important in reviewing the state of the art, thereby exposing not only knowledge but also the notable lack thereof in essential areas .

  • Proceedingpp 105-115AbstractPDF

    Recent trends in structural design theory and material science are reviewed and discussed in relation to research on the mechanical properties of paper and board.

  • Proceedingpp 117-149AbstractPDF

    Quality control, statistical quality control, process control, total quality, are some of the phrases used to describe a function that varies considerably from one manufacturer to another and from one author to another. This paper attempts to review the changes in the concept of quality control that have resulted from the application of research programmes.

    The historical scenario has three aspects. Just before the war an awareness was arising of the fact that paper was variable and that the variability had two components: along and across the machine. During the war paper had to conform to the same acceptance procedures as a raw material as did other military supplies. Thus the concept of statistical quality control was developed which, whilst recognising the need to relate property levels to the underlying variability, nevertheless used methods more adapted to discrete units of production rather than to a continous product.

    It was not until after the war that major studies were undertaken, in the golden era of paper research, into the variability on the macro- and micro-scale of the paper product. This was the period of the awareness of the need for uniformity and freedom from mechanical defects, particularly in paper for high speed letterpress and gravure applications. The results of detailed study into the heterogeneity of the sheet prompted the development of instruments which would enable fundamental properties to be measured.

    The result of two decades of fundamental work, not by the paper industry but by the process control industry, is the current situation of integrated measurement and control, which is described in some detail. Finally, the ability to know precisely what is being made has resulted in the concept of total quality.

    Such a survey would not be complete without some reference to the development of product quality standards and specialised tests which relate to end user requirements. These, however, whilst constituting a major factor in the industry’s research programme, are, in the authors opinion, of less importance in comparison to the extraordinary developments in process control made by firms specialising in that function.

    Acknowledgements are made to very many people throughout the
    industry who have helped in this survey.

  • Proceedingpp 253-264AbstractPDF

    The theme of this paper is a comparison of the role, properties, and technology of fibrous paper-making raw materials other than wood, with those of wood. Aspects considered are the economic role in world pulp supplies, the nature and properties of the fibres, technological problems arising in pulping, the properties and economic status of the resulting pulps, and the present and likely future of fundamental research.

    To the vast majority of those connected with paper manufacture “cellulose pulp” is instinctively synonymous with wood pulp, especially in North American and Scandinavia. The aim of this paper is to redress this tendency, in particular from the point of view of the title of this Symposium. This is attempted by a comparison from all relevant aspects of the role, properties and technology of fibrous cellulose paper-making raw materials other than wood with those of wood. Thus, non-cellulose fibres (as of asbestos or glass) and modified cellulose fibres (usually derived from wood) are excluded.

  • Proceedingpp 277-308AbstractPDF

    This paper presents the results of an experimental and theoretical investigation into the fundamental mechanisms that govern ultrasonic propagation in fibre slurries. An experimental apparatus which measures the attenuation and velocity of ultrasound in slurries is described. Measurements on wood fibre slurries show, in contrast to previous work, that the effect of the fibre on the velocity of ultrasound is negligible. This observation led to the development of an isolated segment model, which can predict attenuation as a function of fibre properties and ultrasonic frequency. The theory assumes the fibres are isolated, isotropic, infinite cylinders. It accounts for scattering, heat conduction, viscous losses in the fluid, and relaxation processes in the fibre. Experiment and theory are shown to be in good agreement for some synthetic fibre slurries. In the more complicated case of wood fibre suspensions, the theory predicts attenuation to the correct order of magnitude and permits speculation about the effects of fibre properties.