A Similarity Measure for GPU Kernel Subgraph Matching

Accelerator architectures specialize in executing SIMD (single instruction, multiple data) in lockstep. Because the majority of CUDA applications are parallelized loops, control flow information can provide an in-depth characterization of a kernel. CUDAflow is a tool that statically separates CUDA binaries into basic block regions and dynamically measures instruction and basic block frequencies. CUDAflow captures this information in a control flow graph (CFG) and performs subgraph matching across various kernel's CFGs to gain insights to an application's resource requirements, based on the shape and traversal of the graph, instruction operations executed and registers allocated, among other information. The utility of CUDAflow is demonstrated with SHOC and Rodinia application case studies on a variety of GPU architectures, revealing novel thread divergence characteristics that facilitates end users, autotuners and compilers in generating high performing code

Isopropylation of naphthalene over large pore zeolites

469-472Isopropylation of naphthalene with isopropanol (IPA) proceeds at 200°C over the large pore zeolites HY, Hβ, H-Mordenite and REY in the presence of N2. Over Hβ, conversion is more in N2 than when cyclohexane is used as solvent or in absence of N2. Conversions and selectivities to diisopropyl naphthalenes fall in the sequence Hβ > REY > HM > HY, but 2,6: 2,7 ratio is greatest with HM.With Hβ, conversion is maximum at 200°C, and increasing the IPA : naphthalene ratio leads to deactivation of the catalyst

Alkylation of naphthalene with t-butanol: use of carbon dioxide as solvent

Organic solvent free alkylation of naphthalene and t-butyl alcohol (TBA) over rare earth exchanged Y zeolite (REY) has been carried out in the presence of carbon dioxide at different process conditions (temperature between 418 and 458 K, pressure between 6 and 92 bar, TBA/naphthalene mole ratios of 1:4, and different periods of time (1.5-9 h)). The results suggest that fluid carbon dioxide can replace organic solvents as a medium for butylation of naphthalene over REY without loss of its shape selective characteristics

Effect of latex concentration on epoxidation of natural rubber (NR) latex

Effect of latex concentration on the extent of epoxidation and physical properties of epoxidized natural rubber (ENR) was evaluated as a function of latex concentration in the range of 20-60% by weight. The epoxidation rate increased with increasing latex concentration. Physical properties and sequence distribution of an epoxy group of ENR with 30 mol % epoxy content was invariant with the latex concentration employed for epoxidation