Rainfall-induced landslide is a common natural hazard, and one of the disaster-causing factors loss apparent cohesion that mainly caused by dissipation matric suction. To analyze rainfall-induced landslide, especially post-failure behaviors, suction model proposed incorporated into Discontinuous Deformation Analysis (DDA). In this model, simplified as an equivalent line load updated at each tim...

In the first part of the paper we present a short review of applications of digital differential analyzers (DDA) to generation of circles showing that they can be treated as one-step numerical schemes. In the second part we present and discuss a novel fast algorithm based on a two-step numerical scheme (explicit midpoint rule). Although our algorithm is as cheap as the simplest one-step DDA alg...

The enactment of the Americans with Disabilities Act (ADA) in 1990 triggered a substantial academic debate about its consequences on employment rates of disabled people. In contrast, the employment provision of the 1996 Disability Discrimination Act (DDA) in Britain has received little attention. Exploiting both pooled and longitudinal data, this paper provides robust evidence that, similar to ...

The literature on regularization of illegal land in urban areas provides a general understanding that bureaucrats in various developing country initiate legalization of illegal settlements for either direct or indirect political gains or economic benefits. This thesis questions this conventional understanding of the motivations of the bureaucrat to legalize illegal settlements. The thesis argue...

In this paper, we address the problem of distributed learning over a large number of distributed sensors or geographically separated data centers, which suffer from sampling biases across nodes. We propose an algorithm called random walk distributed dual averaging (RW-DDA) method that only requires local updates and is fully distributed. Our RW-DDA method is robust to the change in network topo...

Discrete dipole approximation (DDA) is used to calculate extinction efficiencies of porous silicate and graphite grains. We apply DDA first to the spheroidal solid grains assumed to be made of a large number of small scattering elements (dipoles). Then we systematically reduce the number of dipoles to model the porous grains. The extinction is studied as a function of wavelength, grain size and...

Diffuse dermal angiomatosis (DDA), a rare dermatological disorder and variant of reactive cutaneous angioendotheliomatosis, is characterized clinically by the presence of erythematous and violaceous lesions that have the potential to ulcerate. Although it classically presents in the extremities, a few cases have been reported of DDA involving the breast (DDAB). DDA has often been linked to vaso...

The interaction of chitosan with plasmid DNA was investigated as a function of pH, buffer composition, degree of deacetylation (DDA), and molecular weight (M(n)) of chitosan, using isothermal titration microcalorimetry (ITC). The Single Set of Identical Sites model was used to obtain the enthalpy of interaction, the binding constant, and the stoichiometry of binding. The chitosan-DNA interactio...

In this paper we take an existing scientific computation code, DDA, and optimize it to run on an IBM Power5 processor. The DDA code, originally developed by a Ph.D. candidate in physics, suffers from excessive execution time caused by a high number of cache accesses and a low rate of instructions per cycle. Our goal is to improve the code’s performance by making a series of optimizations in a s...