{"product_id":"dynamic-trip-modelling-from-shopping-centres-to-the-internet-von-robert-g-v-baker","title":"Dynamic Trip Modelling","description":"The thesis of this book is that there are one set of equations that can define any trip between an origin and destination. The idea originally came from work that I did when applying the hydrodynamic analogy to study congested traffic flows in 1981. However, I was disappointed to find out that much of the mathematical work had already been done decades earlier. When I looked for a new application, I realised that shopping centre demand could be like a longitudinal wave, governed by centre opening and closing times. Further, a solution to the differential equation was the gravity model and this suggested that time was somehow part of distance decay. This was published in 1985 and represented a different approach to spatial interaction modelling.  The next step was to translate the abstract theory into something that could be tested empirically. To this end, I am grateful to my Ph. D supervisor, Professor Barry Garner who taught me that it is not sufficient just to have a theoretical model. This book is an outcome of this on-going quest to look at how the evolution of the model performs against real world data. This is a far more difficult process than numerical simulations, but the results have been more valuable to policy formulation, and closer to what I think is spatial science.  The testing and application of the model required the compilation of shopping centre surveys and an Internet data set.\u003cdiv class=\"aw-variant-hidden-subtitle-div\" id=\"aw-variant-subtitle-9789048171125\"\u003e\u003ch3\u003eFrom Shopping Centres to the Internet\u003c\/h3\u003e\u003c\/div\u003e","brand":"Libri","offers":[{"title":"Softcover - 9789048171125","offer_id":39416580341853,"sku":"9789048171125","price":213.99,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0940\/0622\/files\/be67a80b-73a8-4eb9-9cfe-daeba6bdeee8.jpg?v=1766646293","url":"https:\/\/shop.autorenwelt.de\/products\/dynamic-trip-modelling-from-shopping-centres-to-the-internet-von-robert-g-v-baker","provider":"Autorenwelt Shop","version":"1.0","type":"link"}