Sökning: "wear estimation."

Visar resultat 16 - 20 av 24 avhandlingar innehållade orden wear estimation..

1. 16. Bovine Teeth in Age Assessment, from Medieval Cattle to Belgian Blue : Methodology, Possibilities and Limitations

   Författare :Sabine Sten; Ebba During; Sven Lindskog; Morten Meldgaard; Stockholms universitet; []
   Nyckelord :HUMANIORA; HUMANITIES; Archaeology subjects; Arkeologiämnen; Arkeologi Osteologi Tänder Nötkreatur Medeltid Åldersbedömning Metod; Historical osteology;

   Sammanfattning : The overall aim of the present thesis was to develop and characterise an age assessment method based on incremental lines in dental cementum using contemporary bovine teeth and teeth from archaeological faunal assemblages. The investigations also included two other age assessment methods: tooth wear pattern and macroscopic dental measurements. LÄS MER

3. 17. Crushing Plant Dynamics

   Författare :Gauti Asbjörnsson; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Control; Dynamic Simulation; Screening; Operator Training; Process Optimization; Production Planning; Crushing; Modelling;

   Sammanfattning : The performance of a crushing plant is an essential element in achieving efficient production of aggregates or metals. A crushing plant´s operating performance depends on the design and configuration of each individual process unit, the configuration of the plant, the design of the control system, events occurring in the process and the physical properties of the incoming feed. LÄS MER

4. 18. Sputtering and Characterization of Complex Multi-element Coatings

   Författare :Erik Särhammar; Tomas Nyberg; Ulf Jansson; Urban Wiklund; Gustaf Sjöblom; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; thin film; coating; magnetron sputtering; modelling; tribofilm; tungsten disulphide;

   Sammanfattning : The thin film technology is of great importance in modern society and is a key technology in wide spread applications from electronics and solar cells to hard protective coatings on cutting tools and diffusion barriers in food packaging. This thesis deals with various aspects of thin film processing and the aim of the work is twofold; firstly, to obtain a fundamental understanding of the sputter deposition and the reactive sputter deposition processes, and secondly, to evaluate sputter deposition of specific material systems with low friction properties and to improve their performance. LÄS MER

5. 19. Brake Judder

   Författare :Helena Jakobsson; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

   Sammanfattning : Brake judder is a braking induced, forced vibration occurring in different types of vehicles. The frequency can be as high as 500 Hz, but usually remains below 100 Hz and often as low as 10-20 Hz. The driver experiences judder as vibrations in the steering wheel, brake pedal and floor. LÄS MER

7. 20. Quality of snow deposited in urban areas : Storage, load assessment and release of selected pollutants with snowmelt

   Författare :Arya Vijayan; Maria Viklander; Helene Österlund; Jiri Marsalek; Luleå tekniska universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; VA-teknik; Urban Water Engineering; Centre - Centre for Stormwater Management DRIZZLE ; Centrumbildning - Centrum för dagvattenhantering DRIZZLE ;

   Sammanfattning : Snow deposited in urban areas is exposed to pollutants originating from traffic, wet and dry atmospheric deposition, de-icing chemicals and traction materials. The conventional pollutants found in urban snow include solids (TSS), metals (Zn, Cu, Cd, Pb, etc.), Polycyclic Aromatic Hydrocarbons (PAHs), and chlorides. LÄS MER