Sökning: "Jan Lundgren"

Visar resultat 21 - 25 av 57 avhandlingar innehållade orden Jan Lundgren.

  1. 21. Microscopic Modeling and Simulation of Pedestrian Traffic

    Författare :Fredrik Johansson; Jan Lundgren; Anders Peterson; Andreas Tapani; Winnie Daamen; Linköpings universitet; []
    Nyckelord :;

    Sammanfattning : Walking is an environmentally friendly and important mode of transportation. It constitutes the first and last part of almost any trip, regardless of what the main mode of transport is, and is especially important in connection to public transport trips. LÄS MER

  3. 22. Microscopic Simulation of Pedestrian Traffic

    Författare :Fredrik Johansson; Jan Lundgren; Andreas Tapani; Anders Peterson; Anders Johansson; Linköpings universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Sammanfattning : There has recently been a renewed interest in planning for pedestrian traffic, primarily in connection to public transport interchange stations, since these are important for public transport to constitute an attractive alternative to car usage. This thesis concerns microscopic simulation of pedestrian traffic, which is a promising tool for analyzing and predicting the traffic situation in a given pedestrian facility; particularly powerful when the traffic is congested. LÄS MER

  4. 23. Long-term metabolic effects of a high birth weight

    Författare :Inger W Johnsson; Jan Gustafsson; Fredrik Ahlsson; Maria Lundgren; Ola Nilsson; Uppsala universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Body composition; Cardiovascular risk factors; Gestational diabetes; Glucose tolerance; High birth weight; Insulin sensitivity; Large for gestational age; Obesity; Offspring macrosomia; Type 2 diabetes; Endocrinology and Diabetology; Endokrinologi och Diabetologi;

    Sammanfattning : The intrauterine environment influences foetal growth as well as future response to risk factors for disease. This occurs partly through epigenetic mechanisms. Thus, birth weight is a possible risk marker of adult disease. LÄS MER

  5. 24. Optimization-Based Methods for Revising Train Timetables with Focus on Robustness

    Författare :Fahimeh Khoshniyat; Jan Lundgren; Johanna Törnquist Krasemann; Steven Harrod; Linköpings universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : With increase in the use of railway transport, ensuring robustness in railway timetables has never been this important. In a dense railway timetable even a small disturbance can propagate easily and affect trains' arrival and departure times. In a robust timetable small delays are absorbed and knock-on effects are prevented effectively. LÄS MER

  7. 25. Incorporation of Departure Time Choice in a Mesoscopic Transportation Model for Stockholm

    Författare :Ida Kristoffersson; Leonid Engelson; Jan Lundgren; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Transport Modelling; Departure Time Choice; Dynamic Traffic Simulation; Time-Varying Congestion Charges; Peak Spreading; Reverse Engineering;

    Sammanfattning : Travel demand management policies such as congestion charges encourage car-users to change among other things route, mode and departure time. Departure time may be especially affected by time-varying charges, since car-users can avoid high peak hour charges by travelling earlier or later, so called peak spreading effects. LÄS MER