An integral equation method for a boundary value problem arising in unsteady water wave problems

In this paper we consider the 2D Dirichlet boundary value problem for Laplace’s equation in a non-locally perturbed half-plane, with data in the space of bounded and continuous functions. We show uniqueness of solution, using standard Phragmen-Lindelof arguments. The main result is to propose a boundary integral equation formulation, to prove equivalence with the boundary value problem, and to show that the integral equation is well posed by applying a recent partial generalisation of the Fredholm alternative in Arens et al [J. Int. Equ. Appl. 15 (2003) pp. 1-35]. This then leads to an existence proof for the boundary value problem. Keywords. Boundary integral equation method, Water waves, Laplace’

MobGeoSen: facilitating personal geosensor data collection and visualization using mobile phones

Mobile sensing and mapping applications are becoming more prevalent because sensing hardware is becoming more portable and more affordable. However, most of the hardware uses small numbers of fixed sensors that report and share multiple sets of environmental data which raises privacy concerns. Instead, these systems can be decentralized and managed by individuals in their public and private spaces. This paper describes a robust system called MobGeoSens which enables individuals to monitor their local environment (e.g. pollution and temperature) and their private spaces (e.g. activities and health) by using mobile phones in their day to day life

Investigation of reactivity of launch vehicle materials with liquid oxygen Quarterly report, 23 Jul. - 22 Oct. 1968

Reactivity of launch vehicle organic materials with liquid oxyge

Investigation of Reactivity of Launch Vehicle Materials with Liquid Oxygen

Impact sensitivity and ignition mechanism of organic compounds in liquid oxygen correlated with chemical and physical propertie

Movements of Translocated and Nontranslocated Canada Geese in Georgia Estimated Using Band Recoveries

Overabundant populations of resident Canada geese (Branta canadensis) are an increasing source of human-wildlife complaints throughout the species’ range. Many resident geese exploit urban areas, and translocation is one method of reducing nuisance problems associated with resident Canada geese. Translocated geese have similar harvest rates but lower survival rates than nontranslocated geese. To examine relationships between distance moved and the age, sex, and status of geese, we evaluated distances from banding sites to recovery sites for resident geese banded in Georgia, USA, during 2001–2015. We assessed potential differences in movements between rural and urban, and nontranslocated and translocated geese, by examining the distribution of band recoveries spatially. Rural and urban geese traveled similar distances; however, distances traveled by translocated geese were significantly farther than nontranslocated geese, and adults traveled significantly farther than juveniles. Our findings suggest that distances moved by resident geese are most often localized, and harvested birds were mostly recovered in-state