{"title":"Robert Gv Baker","description":null,"products":[{"product_id":"dynamic-trip-modelling-book-robert-gv-baker-9781402043451","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.","brand":"WoB","offers":[{"title":"GB \/ NEW \/ INGRAM","offer_id":52584277672209,"sku":"NLS9781402043451","price":0.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0784\/4072\/6801\/files\/9781402043451.jpg?v=1761049583"},{"product_id":"dynamic-trip-modelling-book-robert-gv-baker-9789048171125","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.","brand":"WoB","offers":[{"title":"GB \/ NEW \/ INGRAM","offer_id":52676245094673,"sku":"NLS9789048171125","price":0.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0784\/4072\/6801\/files\/9789048171125.jpg?v=1785946451"}],"url":"https:\/\/www.worldofbooks.com\/collections\/author-books-by-robert-gv-baker.oembed","provider":"World of Books ","version":"1.0","type":"link"}