We test the hypothesis that the opening of an Urgent Care Center (UCC) has positive impacts on the local community. There are several mechanisms through which a UCC can have an impact: lower health care costs, emergency room decongestion, and improved access to medical information. We examine the entry of MedExpress into Appalachian counties between 2001 and 2013. Employing data from Health Res...

A 0-1 matrix \(M\) contains a pattern \(P\) if we can obtain from by deleting rows and/or columns and turning arbitrary 1-entries into 0s. The saturation function \(\mathrm{sat}(P,n)\) for indicates the minimum number of 1s in an \(n \times n\) that does not contain \(P\), but changing any 0-entry 1-entry creates occurrence \(P\). Fulek Keszegh recently showed each has either \(\mathcal{O}(1)\)...

A facility with front room and back room operations has the option of hiring specialized or, more expensive, cross-trained workers. Assuming stochastic customer arrival and service times, we seek a smallest-cost combination of cross-trained and specialized workers satisfying constraints on the expected customer waiting time and expected number of workers in the back room. A constraint programmi...

Replacing an existing endotracheal (ET) tube with a tracheostomy tube can be a challenging and high-risk procedure for the patient, surgeon, anesthetist, and operating room staff. This article describes an approach designed to reduce the risks involved and, at the same time, provide a safe, efficient, and simplified approach to surgically securing the airway. Before surgical entry into the trac...

This research was conducted to organize and model a comprehensive paratransit dispatching task activity in a computer-assisted control room. The dispatching task involves continuous monitoring and interaction with archived and real-time data using a dispatch software. Extensive field observations and video recordings of dispatch operations were conducted. Then, an expert dispatcher was used to ...

In contrast to the prevailing supply-side explanation that price decreases are the key driver of a sales take-off, we argue that outward shifting supply and demand curves lead to market take-off. Our fundamental idea is that sales in new markets are initially low since the first commercialized forms of new innovations are primitive. Then, as new firms enter, actual and perceived product quality...

Easily synthesized1-methyl-3-(2-oxyethyl)-1H-imidazol-3-ium-borate sulfonic acid {[MOEI]-BSA} as a novel catalyst efficiently promoted the synthesis of quinoxaline derivatives via condensation of various diamines with 1,2-dicarbonyl compounds at room temperature conditions in ethanol. This research provides a new method for the synthesis of quinoxalines in good to excellent yields with little c...

The utility of homogeneous gold complexes as carbophilic pacids has been well-established, with numerous reports of gold-catalyzed reactions that were initiated by addition of nucleophiles into unsaturated carbon–carbon bonds. Although protodeauration is common, several reactions have been developed in which the resulting organogold intermediate was intercepted. For example, nucleophilic reagen...