Linking microsimulators of bus stops and traffic operations: the case of PASSION and BusSIGSIM

The aim of this article is to explore the linkage of two microsimulators developed at theUniversity College London. At present, these models deal independently with buses ateither bus stops or traffic networks. First, both microsimulators are described in somedetail. The generic way in which both models can be connected is then proposed. As aresult of this analysis, the main issues for a comprehensive introduction of public transportvehicles (buses) into microscopic traffic simulators are highlighted. One practical outcomeof this study is that the improvement in the representation of buses in microscopic trafficsimulators will allow the engineers to take into account traffic management measures thatotherwise will not be assessed

Study of passenger-bus-traffic interactions on bus stop operations

Buses are the unsung heroes of public transport in modern cities around the world in high,medium and low income countries. However, the bus system is usually cobbled by poordesign which has resulted from poor understanding of how a busThis paper examines theimpacts of the interactions between buses, passengers and traffic on bus operations, especiallyin relation to delays and capacity at bus stops. First, the principles of bus stop operations arepresented. Issues like the stages of bus stop operations, the classification of times spent at busstops, causes of delays, and the interaction between bus flow and stop delays are analysed.This leads to the necessity of microscopic simulation to study stops operations. Then, anillustration of the sort of understanding that can be achieved with a simulation modem isshown. Simulation experiments regarding arrival patterns of buses and passengers, boardingtimes, difficulties for buses to leave the stop, and vehicle capacity are presented. Resultsindicate that it is important not to underestimate the real situation found at bus stops, asdesigning for ideal conditions will be insufficient if the reality is different

Simple one-dimensional quantum-mechanical model for a particle attached to a surface

We present a simple one-dimensional quantum-mechanical model for a particle attached to a surface. We solve the Schr\"odinger equation in terms of Weber functions and discuss the behavior of the eigenvalues and eigenfunctions. We derive the virial theorem and other exact relationships as well as the asymptotic behaviour of the eigenvalues. We calculate the zero-point energy for model parameters corresponding to H adsorbed on Pd(100) and also outline the application of the Rayleigh-Ritz variational method

Developing of the smart textile for energy expenditure monitoring

Peer ReviewedPostprint (published version

Bayesian decision making in human collectives with binary choices

Here we focus on the description of the mechanisms behind the process of information aggregation and decision making, a basic step to understand emergent phenomena in society, such as trends, information spreading or the wisdom of crowds. In many situations, agents choose between discrete options. We analyze experimental data on binary opinion choices in humans. The data consists of two separate experiments in which humans answer questions with a binary response, where one is correct and the other is incorrect. The questions are answered without and with information on the answers of some previous participants. We find that a Bayesian approach captures the probability of choosing one of the answers. The influence of peers is uncorrelated with the difficulty of the question. The data is inconsistent with Weber's law, which states that the probability of choosing an option depends on the proportion of previous answers choosing that option and not on the total number of those answers. Last, the present Bayesian model fits reasonably well to the data as compared to some other previously proposed functions although the latter sometime perform slightly better than the Bayesian model. The asset of the present model is the simplicity and mechanistic explanation of the behavior.Comment: 8 pages, 6 figures, 1 tabl

Effect of higher orbital angular momenta in the baryon spectrum

We have performed a Faddeev calculation of the baryon spectrum for the chiral constituent quark model including higher orbital angular momentum states. We have found that the effect of these states is important, although a description of the baryon spectrum of the same quality as the one given by including only the lowest-order configurations can be obtained. We have studied the effect of the pseudoscalar quark-quark interaction on the relative position of the positive- and negative-parity excitations of the nucleon as well as the effect of varying the strength of the color-magnetic interaction.Comment: 7 pages, 4 figures. To be published in Phys. Rev. C (November 2001

The confined hydrogen atom with a moving nucleus

We study the hydrogen atom confined to a spherical box with impenetrable walls but, unlike earlier pedagogical articles on the subject, we assume that the nucleus also moves. We obtain the ground-state energy approximately by means of first--order perturbation theory and by a more accurate variational approach. We show that it is greater than the one for the case in which the nucleus is clamped at the center of the box. Present approach resembles the well-known treatment of the helium atom with clamped nucleus