Reginald E. Bryant

  • Citations Per Year
Learn More
Nairobi is one of the fastest growing metropolitan cities and a major business and technology powerhouse in Africa. However, Nairobi currently lacks monitoring technologies to obtain reliable data on traffic and road infrastructure conditions. In this paper, we investigate the use of mobile crowdsourcing as means to gather and document Nairobi's road(More)
According to the UN-HABITAT, the city of Nairobi loses half a million USD daily due to congestion on roads designed for a city 10 times smaller. Therefore, there is a great need for traffic management and awareness solutions. Many existing solutions are unsuitable for cities like Nairobi due to economic constraints, dynamic events, uncertainty, and poor(More)
Rapid urbanization of developing cities creates challenges for governments to update and maintain the city infrastructure. One particular challenge is to plan for road capacities that will sustain the growing demand for surface transportation on the road network. For these cities, a sophisticated road infrastructure that includes sensors (e.g., loop(More)
In this poster, we present a mobile crowdsourcing application, called Afya Ya Barabara (AYB) (which means road health in Kiswahili). The application serves 2 major roles: First is to collect and visualize data on road surface conditions in Nairobi. Second role is as a citizen engagement platform to raise awareness on the state of road conditions in Nairobi(More)
V This paper presents approximation hardness results for three equivalent problems in Boolean function complexity. Consider a Boolean function / on n variables. The first problem is to minimize the level i in the Ordered Binary Decision Diagram (OBDD) for / at which the number of nodes is less than 2. We show that this problem is not approximable to within(More)
The emphasis of our research program is the design, epitaxial growth, device fabrication and characterization of a number of photonic and opto-electronic structures and devices. The epitaxial growth of the heterostructures is performed in a Veeco GEN 200 solid source, multi-wafer, dualreactor molecular beam epitaxy (MBE) system. The Veeco MBE system is(More)
A design is presented for a nanoelectromechanical optical switch based on the horizontal deflection of an input waveguide to align with one of two output waveguides. The use of highindex (GaAs) strip waveguides surrounded by air, designed to be single-mode at 1.55 m, significantly decreases device dimensions as compared to previous designs. Design tradeoffs(More)
Graduate Students Will Arora, Raul Barreto, Reginald Bryant, Chris Dames, Hootan Farhat, Amanda Giermann, Charles Holzwarth, Hyun-Jin In, Filip Ilievski, Natalija Jovanovic, Wonjoon Jung, Ramkumar Krishnan, Elizabeth Lyons, Eric Mattson, Kaveh Milaninia, Jihun Oh, Thomas O’Reilly, Amil Patel, Ashok Rajamani, Michael Segal, Ryan Tabone, Satoshi Tekahashi,(More)
In the future, optical networks may see an expanded role not only in telecommunications, but also in computers and other common electronic devices. These optical networks will require small, on-chip light sources. By using the photonic crystal's ability to strongly confine light, photonic crystal lasers can be built very small and very efficient, making(More)
Many intelligent transportation systems (ITS) in cities with developed economies are making use of mobile technology as data sources (e.g., many crowd-sourced traffic-related applications) to improve the quality and efficiency of transportation networks. Often, these data sources are used to supplement existing traffic monitoring equipment (e.g.,(More)