a computational optimization was performed for a direct-injection diesel engine using three-dimensional modeling. fully transient cfd analyses of different valve profile strategies for the intake and compression strokes were performed to evaluate the effects on both engine performance and in-cylinder flow-field evolution. the turbulence model was used along with the second order linear upwind s...

An Intrusion Detection System (IDS) is a piece of software and/or hardware designed to detect unwanted attempts at accessing, manipulating, and disabling of computer systems, through a network such as the Internet. Network-based Intrusion Detection Systems (NIDS) try to detect malicious activities by monitoring network traffic. Research on network traffic measurement has identified various patt...

Coronary bifurcations remain one of the most challenging lesion subsets, even in the era of drug-eluting stents. Single stent implantation in the main vessel with provisional stenting to the side branch vessel has been found superior to double stenting and is considered the default approach in most coronary bifurcation lesions. However, in true bifurcation lesions, this provisional approach may...

Pattern-forming processes in simple fluids and suspensions have been studied extensively, and the basic displacement structures, similar to viscous fingers and fractals in capillary dominated flows, have been identified. However, the fundamental displacement morphologies in frictional fluids and granular mixtures have not been mapped out. Here we consider Coulomb friction and compressibility in...

Dispersal distances overestimate the gene-flow scale l (the square-root of the mean squared distance travelled from birth to reproduction) when egg laying is concentrated early in dispersal and when there is mortality during dispersal. If egg laying follows a square-root normal distribution in time, as it does in several Drosophila species, then l is reduced to about 0.6 of that estimated from ...