In one of his early papers Claude Berge proved a Helly-type theorem, which replaces the usual “nonempty intersection” condition with a “convex union” condition. Inspired by this we prove a fractional Helly-type result, where we assume that many (d+1)-tuples of a family of convex sets have a star-shaped union, and the conclusion is that many of the sets have a common point. We also investigate s...

This paper discusses evaluation in the context of public art and specifically of interactive digital art. The study reported is of ‘Light Logic’, an exhibition of retrospective and current drawings, paintings and interactive digital works by the second author. The study was conducted by Site Gallery Sheffield in association with UK and Australian researchers. A survey of evaluation practice amo...

Resistive Switching In article number 2101905, Hyung Koun Cho and co-workers solve the trade-off issue between photo-charge transport stability originating from use of insulating protection layers. The electrochemical forming process suggested for TiO2 layer on photocathodes draws inspiration typical resistive switching behaviors in resistive-type memory with metal/insulator/metal (MIM) structu...

abstract aims: the application of photocatalytic processes to remove heavy metals in aqueous solutions and industrial wastewater are regarded as extremely effective, clean and without producing waste methods. the goal of the present study was to investigate the photocatalytic activity of zno based on h-zsm-5 zeolite support. materials & methods: zno/h-zsm-5 composite synthesized by impregnation...

Oligonucleotides (ONs) modified with a locked nucleic acid (LNA) are widely used in the fields of therapeutics, diagnosis, and nanotechnology. There have been significant efforts towards developing LNA analogues bearing modified bridges to improve their hybridization ability, nuclease resistance, and pharmacokinetic profiles. Moreover, nucleobase modifications of LNA are useful strategies for t...

tungsten trioxide nanoparticles with two different sizes (average particle sizes about 50 and 80 nm) were prepared by the spray pyrolysis method. photo degradation of congo red (azo dye) showed that photo catalytic property of the as-prepared wo3 nanoparticles with average size about 80 nm is higher than the sample with average size about 50 nm. photo degradation of rhodamine b (cationic triary...

Titanium dioxide has been widely used for photo-catalytic and self-cleaning activities. In this study, TiO2 /SiO2 /Co nanocomposite was prepared by sol-gel method in the presence of Polyvinyl Pyrrolidone (PVP), and Hydroxyl Propyl Cellulose (HPC) as additives, and characterized by IR spectra, Scanning Electron Microscopy (SEM), Energy Dispersive Analytical X-Ray (EDAX), and X-Ray Diffraction (X...

• Pristine CaTiO 3 has no activity for SCR deNO x , while Ce-Fe-Mn doped could achieve almost 100% NO conversion at 135°C (GHSV = 72000 h -1 ). By selectively activating gaseous molecules, Ti, Fe, and Mn present apparent synergistic effects on accelerating the catalytic cycle of standard SCR. The photocarriers intensify oxidation rather than NH -to-NH 2 transformation. Although photocatalysis e...

nifedipine (nif), a 1,4-dihydropyridine calcium channel antagonist, undergoes photo-degradation to dehydro-nifedipine (dnif) upon exposure to ultraviolet (uv) light and to the nitroso analogue of dehydro-nifedipine (ndnif) when exposed to sunlight or some kinds of artificial lights. nif photo-degradation products do not contribute to clinical activity, thus prevention of photo-degradation of ni...

abstract a title, in conveying the meaning of the entitled photo, can act from being a designator to an element which changes the meaning and its message is perceived in different levels of obtaining the photo’s final meaning. therefore, ignoring its role in interpreting the content of work is the same as eliminating a part of photo. various studies have been done centering titling issue, but t...