In his long years of studying visual perception, Jacob Beck made many contributions. This article is a short review of one line of his research--that we shared in--and then a presentation of some results from on-going research down the same line. In the 1980s Beck and his colleagues introduced a new kind of visual stimulus: element-arrangement texture patterns. A series of studies with these pa...

Clouds are an important aspect of rendering outdoor scenes. This paper describes a cloud system that extends texture splatting on particles to model a dozen cloud types (e.g., stratus, cumulus congestus, cumulonimbus), an improvement over earlier systems that modeled only one type of cumulus. We also achieve fast real-time rendering, even for scenes of dense overcast coverage, which was a limit...

One of the main security mechanisms in Android is the permission system. Previous research has pointed out that this system is too coarse-grained. Hence, several mechanisms have been proposed to address this issue. However, to date, the impact of changes in the current permission system on both end users and software developers has not been studied, and no significant work has been done to dete...

Ground settlement due to the shallow tunneling in urban areas can have considerable implications for aboveground civilinfrastructures. Engineering geological characteristics of the tunnel host ground including geotechnical parameters of surrounding soil,groundwater situation, and in situ stress condition are amongst the most important factors affecting settlement. In this research, groundsettle...

To improve the material characteristics of singleand poly-crystals of pure copper, the respective relationships between crystallographic orientations and microstructures, and the bending and mechanical properties were examined. And texture distribution is also analyzed. A grain refinement procedure was performed to obtain a grained structure. Furthermore, some analytical results related to crys...

Fine-grained cryptographic primitives are ones that are secure against adversaries with an apriori bounded polynomial amount of resources (time, space or parallel-time), where the honest algorithms use less resources than the adversaries they are designed to fool. Such primitives were previously studied in the context of time-bounded adversaries (Merkle, CACM 1978), space-bounded adversaries (C...

In theory, join points can be arbitrary places in the structure or execution of a program. However, most existing aspect languages do not support the full expressive power of this concept, limiting their pointcut languages to a subset of the theoretically possible join points. In this paper we explore a minimal language design based on only three built-in fine-grained pointcuts, which enable ex...

Traditional approaches to receiver-driven layered multicast have advocated the benefits of cumulative layering, which can enable coarse-grained congestion control that complies with TCP-friendliness equations over large time scales. In this paper, we quantify the costs and benefits of using non-cumulative layering and present a new, scalable multicast congestion control scheme which provides a ...