Sökning: "shells"

Visar resultat 1 - 5 av 126 avhandlingar innehållade ordet shells.

  1. 1. Shells and filament in flows

    Författare :Vipin Agrawal; Dhrubaditya Mitra; Supriya Krishnamurthy; Gerhard Gompper; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Chaos; Elastic filaments; Shells; Exosomes; Stokes flow; Theoretical Physics; teoretisk fysik;

    Sammanfattning : The motivation to study elastic structures such as filaments and shells stemmed from its application in the construction of tall buildings, bridges etc. Interest in this field has rekindled in the past decades due to growing interest in understanding biological materials and because of possible applications in nanoscience and medicine. LÄS MER

  3. 2. Fundamental Study of two Selected Tropical Biomasses for Energy : coconut and cashew nut shells

    Författare :Alberto Júlio Tsamba; Wlodzimierz Blasiak; A. K. Gupta; KTH; []
    Nyckelord :Cashew nut shells; coconut shells; biomass; thermogravimetry; pyrolysis; kinetics; combustion; TECHNOLOGY; TEKNIKVETENSKAP;

    Sammanfattning :  Cashew nut and coconut shells are two potential renewable and environmentally friendly energy sources that are commonly found as agro-industrial wastes in tropical countries. Despite this fact, they are not yet widely studied as such. LÄS MER

  4. 3. Dynamic Equations for Spherical, Orthotropic and Piezoelectric Cylindrical Shells Using the Power Series Method

    Författare :Reza Okhovat; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; shell equations; cylindrical shell; eigenfrequency.; piezoelectricity; Shells; Hamilton’s principle; surface differential operators; recursion relations; spherical shell; orthotropic; dynamics;

    Sammanfattning : Shells are commonly used in many branches of engineering, and have therefore beeninvestigated for a number of different types of shells. A shell is considered to be curved aplate with small thickness compared both to the other geometrical dimensions as well asto the wavelengths of importance. LÄS MER

  5. 4. Pyrolysis profiles and global kinetics of tropical biomass : coconut and cashew nut shells

    Författare :Alberto Júlio Tsamba; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; thermogravimetry; cashew nut cocnut shells; pyrolysis; kinetics; Other materials science; Övrig teknisk materialvetenskap;

    Sammanfattning : Biomass has been recognised as renewable and environmentally friendly source of energy since decades. Tropical biomasses which are available in large quantities as residues in Latin America, Africa and Asia, have high energy potential for exploitation through thermochemical conversion process, as pyrolysis, gasification or combustion. LÄS MER

  7. 5. Bivalve shells as environmental archives

    Författare :Elena Dunca; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Earth sciences; Geovetenskap; Earth sciences; Geovetenskap; Historical Geology and Paleontology; historisk geologi och paleontologi;

    Sammanfattning : Bivalves can be used as environmental biomonitors by studying the growth rate and the structure of their shells, as well as by analysing elemental distribution in the shells. Information about water chemistry, temperature and pH, about precipitation, food supply and other environmental parameters are stored in the bivalve shells. LÄS MER