Results 41 to 50 of about 118,691,665 (153)
An Improved Algorithm for Open Online Dial-a-Ride
, 2022 We consider the open online dial-a-ride problem, where transportation requests appear online in a metric space and need to be served by a single server. The objective is to minimize the completion time until all requests have been served. We present a new, parameterized algorithm for this problem and prove that it attains a competitive ratio of $1 + φ ...
Júlia Baligács +3 more
openaire +4 more sources
Networks, EarlyView.ABSTRACT The Traveling Salesman problem with pickup, delivery, and ride‐time constraints (TSPPD‐RT) requires a depot‐based vehicle to visit multiple known requests. Each request specifies a pickup vertex, corresponding delivery vertex, and maximum travel time between them (ride‐time). The goal is to find a tour that (i) starts and finishes at the depot,
Xinbo Zhang, Roberto Baldacci
wiley +1 more source
Easing the Burden? Religiosity and Educational Inequality in Pain Interference
Journal for the Scientific Study of Religion, EarlyView.ABSTRACT A consistent inverse gradient in pain prevalence is typically observed across educational strata. Religion stands out as a source of social and personal support that may moderate the amount of chronic pain interference but may do so differently across the educational spectrum.
Laura Upenieks, Markus H. Schafer
wiley +1 more source
Difference‐Making Under Metaphysical Indeterminacy
Philosophy &Public Affairs, Volume 54, Issue 4, Page 262-273, Fall 2026.ABSTRACT Many of the most pressing moral problems we face involve collective harms generated by large numbers of individually insignificant actions. Unlike triggering cases—where a threshold exists such that a single act could be decisive—non‐triggering cases lack any such sharp cutoff.
Jessica Li
wiley +1 more source
A tight formulation for the dial-a-ride problem
European Journal of Operational ResearchRidepooling services play an increasingly important role in modern transportation systems. With soaring demand and growing fleet sizes, the underlying route planning problems become increasingly challenging. In this context, we consider the dial-a-ride problem (DARP): Given a set of transportation requests with pick-up and delivery locations, passenger
Daniela Gaul +4 more
openaire +3 more sources
Engineering Reports, Volume 8, Issue 11, November 2026.This study develops a graph‐based deep learning framework to predict short‐term demand in demand‐responsive transit systems. Using real‐world data from Kalamazoo's Metro Connect, the model supports service zone optimization and infrastructure planning by accurately forecasting spatial–temporal passenger demand with high resolution.
Diana Al‐Nabulsi +2 more
wiley +1 more source
Regional dial-a-ride passenger survey report [PDF]
, 2011 : Valley Metro periodically conducts surveys with Dial-A-Ride passengers to gather information on trip making, demographic, and rider satisfaction with transit services. Previous Dial-a-Ride studies were conducted in 2000, 2002, and 2007.
core
Exploring on-demand service use in large urban areas: the case of Rome [PDF]
Archives of Transport, 2019 Traditional and innovative on-demand transport services, such as taxi, car sharing or dial-a-ride respectively, can provide a level of flexibility to the public transport with the aim to guarantee a better service and to reduce the exploitation costs. In
Agostino Nuzzolo +2 more
doaj +1 more source
Public Engagement to Inform Messaging Aligning With the Muscle‐Strengthening Guidelines
Clinical and Public Health Guidelines, Volume 3, Issue 4, October 2026.ABSTRACT Introduction Physical activity guidelines and their supplementary messaging play a fundamental role in raising awareness and increasing knowledge at a population level. In the United Kingdom, there are no national‐level messaging campaigns accompanying the strength component of their physical activity guidelines for public health.
Ashley Gluchowski
wiley +1 more source
Informatyka, Automatyka, Pomiary w Gospodarce i Ochronie ŚrodowiskaA subset of the Vehicle Routing Problem (VRP), the Dial-a-Ride Problem (DARP) is concerned with the effective route planning of cars employed to pick up and deliver passengers to designated destinations.
Rodolfo Eleazar Pérez Loaiza +2 more
doaj +1 more source