The Institute for Transport Studies at the University of Leeds is carrying out research about the reliability benefits from improved bus infrastructure. The study includes both demand and supply modelling, and it is hoped that the final stage of the project will include an economic analysis of the effects on reliability of different bus infrastructure improvement scenarios. Of the various measu...

The present study aims to predict the potential geographic distribution and future expansion of invasive alien lionfish (Pterois miles) with ecological niche modelling along the Mediterranean Sea. The primary data consisted of occurrence points of P. miles in the Mediterranean and marine climatic data layers were collected from global databases. All the used models run 100% su...

A system model characterized by networks of service stations is used to study trhoughput and response time as a function of system load, and to characterize the effects of saturation in a system. The results are expressed in terms of only three sets of parameters: the matrix of interstation transition frequencies, the light load service rate of each station, and the service capacity of each sta...

Context. Very precise planned space astrometric missions and recent improvements on imaging capabilities require a detailed review of the assumptions of classical astrometric modeling. Aims. We show that Light-Travel Time must be taken into account to model the kinematics of astronomical objects in nonlinear motion, even at stellar distances. Methods. A closed expression to include Light-Travel...

IMPORTANCE Aflibercept-related sterile inflammation, an event that is poorly understood, has been the subject of ongoing postmarketing reports. OBJECTIVE To analyze cases of aflibercept-related sterile inflammation reported to the American Society of Retina Specialists (ASRS) Therapeutic Surveillance Committee (TSC), an independent task force formed to monitor drug- and device-related safety ...

In this chapter I show that elementary math models reveal powerful insights that can help understand better design and management decisions in facility logistics operations. Subsequently I develop models for designing a truckoperated unit-load warehouse (sizing it, calculating the load orientation, and determining the warehouse lengthwidth ratio). Next the optimal stacking depth is calculated a...

The ambulance-planning problem includes operational decisions such as choice of dispatching policy, strategic decisions such as where ambulances should be stationed and at what times they should operate, and tactical decisions such as station location selection. Any solution to this problem requires careful balancing of political, economic and medical objectives. Quantitative decision processes...