Sökning: "Björn Sjöstrand"

Hittade 3 avhandlingar innehållade orden Björn Sjöstrand.

  1. 1. Att tänka det tekniska : En studie i Derridas teknikfilosofi

    Författare :Björn Sjöstrand; Sharon Rider; Hans Ruin; Björn Thorsteinsson; Uppsala universitet; []
    Nyckelord :HUMANIORA; HUMANITIES; Derrida; phenomenology; deconstruction; technicity; technology; tele-technology; media; ethics; politics; religion;

    Sammanfattning : How should we understand the relations between human beings and technology? Where does technology end and where does the human being begin? How should we understand the relation between thinking and technology? These and related questions have been increasingly salient during the last decades. The aim of this study is to provide an outline of a philosophy of technology in the work of a major contemporary philosopher: Jacques Derrida. LÄS MER

  3. 2. Dewatering aspects at the forming section of the paper machine : Rewetting and forming fabric structure

    Författare :Björn Sjöstrand; Lars Nilsson; Christophe Barbier; David McDonald; Karlstads universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Rewetting; forming fabric; forming section; dewatering; web dryness; high vacuum suction box; vacuum dewatering; forming fabric design; numerical model; Chemical Engineering; Kemiteknik;

    Sammanfattning : The underlying motives of the research undertaken here are twofold: to obtain a deeper understanding of the dewatering mechanisms at the forming section of a papermaking machine and to develop numerical models that describe the flow through forming fabrics. More comprehensive knowledge of dewatering in the forming section allows suggestions to be made for improvements that reduce the amount of energy used in the process without affecting the quality of the end product. LÄS MER

  4. 3. Vacuum Dewatering of Cellulosic Materials : New insights into transport phenomena in the papermaking process

    Författare :Björn Sjöstrand; Lars Nilsson; Christphe Barbier; Henrik Ullsten; Martin Hubbe; Karlstads universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Vacuum dewatering; numerical model; water removal; air penetration; papermaking; microfibrillated cellulose; dialcohol cellulose; strength additives; retention aids; drainage; water retention value; Chemical Engineering; Kemiteknik;

    Sammanfattning : Working towards sustainable development within the forest industry, the dewatering of pulp and paper must be fully understood along with the dewatering of other cellulose-based materials. Huge amounts of energy are used during paper manufacturing so there is a potential for making the processes more energy-efficient. LÄS MER