We propose new probabilistic models for the spatial distribution of supply and demand and use the models to determine how the trip length distribution is affected by the relative shortage or excess of supply, the spatial clustering of supply and demand, and the degree of attraction or repulsion between supply and demand at different spatial scales. The models have a multiplicative structure and...

Medialization thyroplasty and endoscopic intracordal infusion of fat or heterologous materials are the treatments of choice for glottic incompetence, of both neurological and cicatricial origin. Functional evaluation after thyroplastic medialisation is often based on several approaches, in order to assess the effectiveness of the adopted technique. The most common analysis methods are: videolar...

This paper is concerned with the inverse electromagnetic scattering from a perfectly conducting local surface displacement on an infinite ground plane. By using multiple frequency data to image the profile of the surface displacement, a stable and accurate reconstruction method is presented and investigated with numerical simulations. An integral equation approach is also introduced for the sol...

At its June,1996 meeting, Senate approved a new Instructor and Course Evaluation form (see Exhibit 1) for university-wide use beginning in the 1996-97 academic year. The distinctive features of the new teaching evaluation form include numerical ratings of a broad range of teacher and course characteristics, written comments from students on instructor and course, assessment of student character...

Part of the scientific enterprise is to measure the material world and to explain its dynamics by means of models. However, not only is measurability of the world limited, analyzability of models is so, too. Most often, computer simulations offer a way out of this epistemic bottleneck. They instantiate the model and may help to analyze it. In relation to the material world a simulation may be r...

PURPOSE The Distance Vision Scale (DVS) is a self-assessment of visual acuity (VA). Like VA testing in which letter reading becomes progressively difficult through the test, DVS questions have a hierarchy of difficulty (Guttman scale). The aims were to determine whether the DVS fulfills Guttman scaling criteria and to test the relationship between DVS score and VA in a cataract population. ME...