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Visar resultat 1 - 5 av 103 avhandlingar som matchar ovanstående sökkriterier.

1. 1. Wheel-rail contact modelling in vehicle dynamics simulation

   Författare :Matin Shahzamanian Sichani; Mats Berg; Roger Enblom; Elena Kabo; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; wheel-rail contact; non-elliptic contact; vehicle-track interaction; rail vehicle dynamics; rolling contact; MBS; virtual penetration; Järnvägsgruppen - Fordonsteknik; Järnvägsgruppen - Fordonsteknik; Järnvägsgruppen - Tribologi; The KTH Railway Group - Tribology;

   Sammanfattning : The wheel-rail contact is at the core of all research related to vehicle-track interaction. This tiny interface governs the dynamic performance of rail vehicles through the loads it transmits and, like any high stress concentration zone, it is subjected to serious damage phenomena. LÄS MER

3. 2. On Efficient Modelling of Wheel-Rail Contact in Vehicle Dynamics Simulation

   Författare :Matin Shahzamanian Sichani; Mats Berg; Roger Enblom; Asier Alonso; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; wheel-rail contact; non-elliptic contact; rail vehicle dynamics; rolling contact; vehicle-track interaction; wheel-rail damage; Järnvägsgruppen - Fordonsteknik; Järnvägsgruppen - Fordonsteknik; Järnvägsgruppen - Tribologi; The KTH Railway Group - Tribology; Vehicle and Maritime Engineering; Farkostteknik;

   Sammanfattning : The wheel-rail contact is at the core of all research related to vehicletrackinteraction. This tiny interface governs the dynamic performanceof rail vehicles through the forces it transmits and, like any high stressconcentration zone, it is subjected to serious damage phenomena. LÄS MER

4. 3. Reproductive isolation at contact zones

   Författare :Samuel Perini; Göteborgs universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; hybrid zone; gene flow; genetic variants; mating; local adaptation; marine species; speciation;

   Sammanfattning : Speciation is among the most important evolutionary processes that contribute to biodiversity. It involves the formation of new species that have become reproductively isolated through a process that is not linear and varies in time and space. LÄS MER

5. 4. Electrochemical Methods for Drug Characterisation and Transdermal Delivery : Capillary Zone Electrophoresis, Conductometry, and Iontophoresis

   Författare :Nadia Merclin; Per Hansson; Sven Engström; Arto Urtti; Uppsala universitet; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Pharmaceutical chemistry; Capillary zone electrophoresis; precision conductometry; iontophoresis; passive diffusion; lidocaine; ALA; ALA-ester derivatives; sponge phase; carbopol gel; Farmaceutisk kemi; Pharmaceutical chemistry; Farmaceutisk kemi;

   Sammanfattning : This thesis concerns the development and utilisation of techniques for characterisation and transdermal delivery of various systems for pharmaceutical applications.The degree of dissociation of drug molecules and the mobilities of the different species formed are essential factors affecting the rate of drug delivery by iontophoresis. LÄS MER

7. 5. The Physical Foundation of the Patterning of Physical Action Verbs : A Study of Chinese Verbs

   Författare :Hong Gao; Allmän språkvetenskap; []
   Nyckelord :HUMANIORA; HUMANITIES; Languages and literatures of South and South-East Asia; verbal semantics; trajector; semantic representation; pyscholingistics; polysemy; physical reality; physical foundation; physical action verbs; observability; motion; lexicalization patterning; landmark; intentionality; innateness; physical contact; force-dynamics; combinability; conflation; cognitive semantics; active zone; affectability; Chinese; Kinesiska och språk och litteratur från Syd- och Sydostasien; Linguistics; Lingvistik; Grammar; semantics; semiotics; syntax; Grammatik; semantik; semiotik;

   Sammanfattning : This work is a study of verbal semantics with a focus on the discussion and illustration of the role of body parts and the semantic incorporation into verbal roots of the actions that involve various body parts. Following a general discussion of the basic issues of language construction and human body actions with the image schemas of force-dynamics presented in line with the framework of cognitive semantics, it is argued that the event structures of physical action verbs are not arbitrarily constructed but rather the constructions are built through systematic cognitive processes in relation to both human physical reality and concrete reality in the world. LÄS MER