Paired and Unpaired Deep Learning Methods for Physically Accurate Super-Resolution Carbonate Rock Images

Transport in Porous Media - X-ray micro-computed tomography (micro-CT) has been widely leveraged to characterise the pore-scale geometry of subsurface porous rocks. Recent developments in...     

Alum (KAl(SO4)2 · 12H2O): An Efficient and Inexpensive Catalyst for the One-pot Synthesis of 1,3,4-Oxadiazoles under Solvent-Free Conditions

Summary. Alum (KAl(SO₄)₂ · 12H₂O) catalyzed the efficient synthesis of mono- and disubstituted 1,3,4-oxadiazoles by the condensation of acyl hydrazides with orthoesters under solvent-free conditions at 100°C. This methodology offers significant improvements for the synthesis of oxadiazoles with regard to the yield of products, simplicity in operation, inexpensive reagents, and green aspects by avoiding toxic catalysts and solvents.     

Discrete ordinates method for propagation of light in highly scattering vascular tissues

This work considers the propagation of light in a semitransparent layer of vascular tissue, submitted to radiative boundary conditions. The solution procedure must provide accurate light distribution in the layer, so a discrete ordinates method based on the exact transport theory is carried out. An advantage of this method is its ability to account easily for various boundary conditions as well as optical heterogeneity. The influences of anisotropic scattering, optical discontinuity, optical parameters of tissue and refractive index on radiant fluence rate are investigated carefully. It is shown that reflections tend to produce more uniform profiles within the tissue.     

Cache-Oblivious Range Reporting with Optimal Queries Requires Superlinear Space

We consider a number of range reporting problems in two and three dimensions and prove lower bounds on the amount of space used by any cache-oblivious data structure for these problems that achieves the optimal query bound of O(log  _B N+K/B) block transfers, where K is the size of the query output.     

Application of BU4N+HSO4 − as an Ionic Liquid and Acid Catalyst for Thioacetalization of Aldehydes and Ketones

A variety of carbonyl containing compounds have been successfully reacted with 1,2-ethanedithiol in a thioacetylization reaction using tetrabutylammonium hydrogensulfate as a mild and efficient catalyst. Aldehydes and ketones react with good to excellent yields under mild conditions.