Carbon monoxide (CO) oxidation is considered an important reaction in heterogeneous industrial catalysis and has been extensively studied. Pd supported on SiO2 aerogel catalysts exhibit good catalytic activity toward this owing to their CO bond activation capability thermal stability. Pd/SiO2 were investigated using carbon as a model reaction. The catalyst becomes active, the conversion increas...

An organically templated iron sulfate of the formula @HN(CH2)6NH#@Fe Fe2 F6(SO4)2#•@H3O# possessing the kagomé lattice has been prepared and characterized by single-crystal crystallography and other techniques. This mixed-valent iron compound shows complex magnetic properties including spin-glass behavior and magnetic hysteresis. The low-temperature specific heat data show deviation from the T ...

Indium-gallium-zinc-oxide (IGZO) thin-film transistors (TFTs) gated with sputtered silicon dioxide dielectric were fabricated. Under different sputtering pressures of dioxide, the device is able to produce transfer curves from clockwise hysteresis anticlockwise hysteresis, corresponding operation modes and thus adding complementary performance by same material system structure. In interface tra...

A network model of porous media is used to assess the effects of pore structure and matrix wettability on the resistivity of partially saturated rocks. Our focus is the magnitude of the saturation exponent n from Archie’s law and the hysteresis in resistivity between drainage and imbibition cycles. Wettability is found to have the dominant effect on resistivity. The network model is used to inv...

BACKGROUND Positive feedback is a common motif in gene regulatory networks. It can be used in synthetic networks as an amplifier to increase the level of gene expression, as well as a nonlinear module to create bistable gene networks that display hysteresis in response to a given stimulus. Using a synthetic positive feedback-based tetracycline sensor in E. coli, we show that the population dyna...

The stiffness of motion segments, together with muscle actions, stabilizes the spinal column. The objective of this study was to compare the experimentally measured load-displacement behavior of porcine lumbar motion segments in vitro with physiological axial compressive preloads of 0, 200 and 400 N equilibrated in a physiological fluid environment, for small displacements about the neutral pos...

In their recent article, Goldich et al. found that corneal hysteresis (CH), corneal resistance factor (CRF), and central corneal thickness were significantly higher in diabetic eyes than in healthy eyes and CH was claimed to be related to the corneal stiffness. However, we found significantly lower CH values in diabetic eyes than in eyes of healthy subjects. We believe that the statements that ...

Despite advances in design and fabrication, backlash remains a fundamental problem in precision mechanical applications. Deadzone and "play" in mechanical couplings cause hysteretic behavior as can structural components with memory. This behavior can degrade the performance of mechanical systems. When the system involves servo control, backlash can cause undesirable limit cycle oscillations. Ou...

Abstract: This research work presents a new rigid connection constructed with channels. In order to assess its hysteresis behavior, three specimens with different cover plates and six specimens with different panel zone thickness have been considered. The energy absorbed by the connection and the behavior of the panel zone were studied during cyclic loading and compared with those of connectio...