Sökning: "intersections"

Visar resultat 6 - 10 av 147 avhandlingar innehållade ordet intersections.

1. 6. Non-linear Spectroscopy of Conical Intersections

   Författare :Deependra Jadoun; Markus Kowalewski; Eva Lindroth; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; kemisk fysik; Chemical Physics;

   Sammanfattning : Conical Intersections (CIs) in a molecule originate from the breakdown of the Born-Oppenheimer approximation when electronic states come close in energy. Ultrafast non-radiative decay channels open up in the vicinity of a CI, thus funneling a molecule from one electronic state to another. LÄS MER

3. 7. Indicators for traffic safety assessment and prediction and their application in micro-simulation modelling : a study of urban and suburban intersections

   Författare :Jeffery Archer; Karl-Lennart Bång; Oliver Carsten; KTH; []
   Nyckelord :Social sciences; Traffic safety; proximal safety indicators; micro-simulation; safety analysis; Samhällsvetenskap; SOCIAL SCIENCES; SAMHÄLLSVETENSKAP;

   Sammanfattning : In order to achieve sustainable long-term transport infrastructure development, there is a growing need for fast, reliable and effective methods to evaluate and predict the impact of traffic safety measures. Recognising this need, and the need for an active traffic safety approach, this thesis focuses on traffic safety assessment and prediction based on the use of safety indicators that measure the spatial and/or temporal proximity of safety critical events. LÄS MER

4. 8. A Model of Driver Perception and Action in Intersections

   Författare :Anna Bjelkemyr; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; intersection; vehicle heading; driving; behavior; driver; perception; eye movement; anticipate;

   Sammanfattning : The objective of the research presented in this thesis is to describe driver behavior while approaching, entering and exiting an intersection. To fulfill this objective, two semi-naturalistic studies were conducted where ten driver participants drove a test vehicle through a three-way intersection repeatedly, driving straight, turning left, and turning right in a total of six possible passes. LÄS MER

5. 9. Photo-induced molecular processes and charge recombination reactions driven by non-adiabatic couplings

   Författare :Michael Stenrup; Åsa Larson; Horst Köppel; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Non-adiabatic processes; Photophysics; Photochemistry; Radiationless deactivation; Conical intersections; Five-membered aromatic heterocyclic compounds; Mutual neutralization; Dissociative recombination; kemisk fysik; Chemical Physics;

   Sammanfattning : This thesis is based on a number of theoretical studies of molecular processes in which non-adiabatic effects play a crucial role. The main part is devoted to the photophysics and photochemistry of five-membered aromatic heterocyclic compounds, with particular focus on furan and thiophene. LÄS MER

7. 10. On Clustering of Random Points in the Plane and in Space

   Författare :Marianne Månsson; Göteborgs universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; geometric probability; integral geometry; convex sets; random intersections; mixed volumes; scan statistics; Poisson approximation; Stein-Chen method; convergence of point processes; scan statistics;

   Sammanfattning : If n points are independently and uniformly distributed in a large rectangular parallelepiped, A in Rd, d =2,3, they may possibly aggregate in such a way that they are contained in some translate of a given convex set C in A. If the points are replaced by copies of C, these translated sets may have a non-empty intersection. LÄS MER