Sökning: "Contact Resistance"

Visar resultat 11 - 15 av 285 avhandlingar innehållade orden Contact Resistance.

1. 11. Extended Computational Module for Tractive Effort at Rolling and Spinning Point Contacts

   Författare :Mikael Törmänen; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; spin; thermal effects; Hertzian contact; continuously variable transmission; rolling resistance; speed pole; traction drive; multi-body system; efficient numerical procedure;

   Sammanfattning : One category of mechanical systems that contains power-transferring point contacts is traction drive variators. These variators can be used in different concepts for Continuously Variable Transmissions (CVTs) and in vehicle applications, in order to achieve optimum engine operating conditions leading to improved driveability, reduced fuel consumption and an increase in overall vehicle performance. LÄS MER

3. 12. Magnetron Sputtering of Nanocomposite Carbide Coatings for Electrical Contacts

   Författare :Kristian Nygren; Ulf Jansson; Peter Leisner; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; transition metal carbide; amorphous carbon; composite; contact resistance; corrosion; friction; optical properties;

   Sammanfattning : Today’s electronic society relies on the functionality of electrical contacts. To achieve good contact properties, surface coatings are normally applied. Such coatings should ideally fulfill a combination of different properties, like high electrical conductivity, high corrosion resistance, high wear resistance and low cost. LÄS MER

4. 13. Fri från (efter)våldet? : Om partnervåldsutsatta kvinnors motstånd, uppbrott och stödbehov

   Författare :Josefin Kjellberg; Marie Flinkfeldt; Ann-Sofie Bergman; Marcus Lauri; Uppsala universitet; []
   Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Female survivors of male intimate partner violence; Resistance; Leaving processes; Post-separation violence; Social work; Våld i nära relationer; Våldsutsatta kvinnors motstånd; Uppbrottsprocess; Eftervåld; Socialt arbete; Socialt arbete; Social Work;

   Sammanfattning : This dissertation investigates resistance strategies and leaving processes of female survivors of male intimate partner violence (IPV), and sheds light on the importance of support from social workers when survivors try to break free from IPV. It also contributes knowledge on how Swedish social workers in social service support units and women’s shelters (run by NGOs or companies) interpret and handle support needs of survivors. LÄS MER

5. 14. Graphene field-effect transistors for high frequency applications

   Författare :Muhammad Asad; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; high frequency; Graphene; transit frequency; transconductance; maximum frequency of oscillation; contact resistance; microwave electronics; field-effect transistors;

   Sammanfattning : Rapid development of wireless and internet communications requires development of new generation high frequency electronics based on new device concepts and new materials. The very high intrinsic velocity of charge carriers in graphene makes it promising new channel material for high frequency electronics. LÄS MER

7. 15. Antimicrobial peptides and virulence factors in meningococcal colonisation and disease

   Författare :Miriam Geörg; Ann-Beth Jonsson; Ole E. Sørensen; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Neisseria meningitidis; antimicrobial peptide; LL-37; cell-penetrating peptide; resistance; polynucleotide phosphorylase; molekylär biovetenskap; Molecular Bioscience;

   Sammanfattning : The Gram-negative bacterium Neisseria meningitidis is a transient commensal of the human nasopharynx, but occasionally causes life-threatening disease. During colonisation of its niche, N. meningitidis has to overcome innate immune defences, including the expression of antimicrobial peptides (AMPs). LÄS MER