Sökning: "point contacts"

Visar resultat 11 - 15 av 103 avhandlingar innehållade orden point contacts.

  1. 11. Perpetual borders : German-Polish cross-border contacts in the Szczecin area

    Författare :Péter Balogh; Gunnel Forsberg; Thomas Lundén; James W. Scott; Stockholms universitet; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; cross-border regional development; Polish-German border; Szczecin; national identities; border attitudes; the Other; kulturgeografi; Human Geography; Östersjö- och Östeuropaforskning;

    Sammanfattning : Borderlands are often peripheral geographically, administratively, and economically. A particularly illustrative case is the Szczecin area at the border between Poland and Germany, where a large city on one side neighbours to a sparsely populated hinterland on the other. LÄS MER

  3. 12. Film thickness measurements for the characterization of EHL contacts

    Författare :John Lord; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Maskinelement; Machine Elements;

    Sammanfattning : This licentiate thesis describes experimental techniques related to the investigation of elastohydrodynamic lubrication of point contacts as well as measurements and evaluation of results from laboratory tests. Elastohydrodynamic lubrication is one of the most severe forms of lubrication when a medium (often a liquid) is expected to separate two surfaces in a mechanical device under extremely high pressures and shear strain rates as well as with very thin lubricant films. LÄS MER

  4. 13. On Trajectory Generation for Robots

    Författare :Mahdi Ghazaei; Institutionen för reglerteknik; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Haptic Interface; Fixed-Time Point-to-Point Trajectory Generation; Online Trajectory Generation; Dynamic Simulation and Optimization; Dynamics with Varying Contacts; Iterative Learning Control;

    Sammanfattning : A fundamental problem in robotics is the generation of motion for a task. How to translate a task to a set of movements is a non-trivial problem. LÄS MER

  5. 14. Fluctuations in Mesoscopic Constrictions

    Författare :Jan Peter Hessling; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; low frequency; fluctuations; quantum; noise; 1 f-noise; superconductivity; impurity; point contact; Andreev reflection; shot noise;

    Sammanfattning : In normal and superconducting quantum point contacts there are several sources of fluctuations. Thermally activated impurities in the vicinity of the junction cause the current (or voltage) to change with a typical frequency of the order of one Hz up to a few kHz. LÄS MER

  7. 15. Schottky Contacs on Silicon Nanowires

    Författare :Johan Piscator; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; Silicon On Insulator SOI ; Schottky contacts; Palladium silicide; Silicon nanowire;

    Sammanfattning : This thesis demonstrates the effect of charge on Schottky barrier height for metal contacts at the end surfaces of silicon nanowires. It is shown, by measurements and analytical models, how the effective electron barrier is lowered by a positive charge introduced into an oxide embedding the wire. LÄS MER