Is a picture worth a thousand views? Measuring the effects of travel photos on user engagement using deep learning algorithms

Electronic Markets - Travel photos inform and inspire consumers by conveying a first-hand destination experience. Despite the proliferation of consumer-generated travel photos in online travel...     

The growth of a non-diffusional component of photocurrent in the gold-rhodamine B photoelectrochemical cell—investigations with static and rotating disc photoelectrodes

Short circuit photocurrents have been drawn continuously for a period of 200 hours from the photoelectrochemical cell: Au|Rhodamine B, FeCl₃, FeCl₂, HCl, H₂O|Au, and show a progressive increase with time for both static and rotating disc photoelectrodes. In the former case, the photocurrent increased by 17–36 per cent during a 175 h period, but in the latter case, it approximately doubled. In both cases, it was still increasing at the cessation of measurements. The increases in photocurrent were accompanied by the deposition on the photoelectrode, of a rhodamine coloured layer, which was removable by soaking and rinsing with water over a period of several days. The observed dependence of photocurrent on angular velocity in the rotating disc measurements, was consistent with the predictions of Albery, Archer and Egdell [J. electroanal. Chem.82, 199 (1977)] for a system in which comparable amounts of light are absorbed within, and without, the diffusion layer. This was approximately the case in the present study. The observed temporal changes of the dependence of photocurrent on angular velocity, were shown to be consistent with the progressive addition of a non-diffusional component to the initial, purely diffusion limited photocurrent.     

Effects of interlaminar stresses on damping of 0-degree unidirectional laminated composites

The principal aim of this paper is to formulate a general model for predicting damping in composites on the basis of the concept of strain energy-weighted dissipation. In this model, the effects of interlaminar stresses on damping have been included in addition to the effects of in-plane extension/compression and in-plane shear. Validation of the model was confirmed by performing damping measurements on 0° unidirectional composite beams with varying length and thickness. The results of theoretical predictions of damping in laminated composites were found to compare favorably with experimental data. The transverse shear (σ_xz) reveals to have a considerable effect on the damping mechanisms in 0° unidirectional polymer composites. However, the other interlaminar stresses (σ_yz, σ_z) were shown to have little influence on damping in composite beam.     

An analytical method for prediction of the damping in symmetric balanced laminated composites

To obtain the effective damping of a laminated composite beam, two different analytical methods were compared. Also, we modified the basic loss factors on the basis of experimental data. In the first method, Ni and Adams's theory was used. In the second method, new energy approach was developed to determine the damping of laminated composite beams. Five typical laminated composites with [±Θ]s, [0/±Θ]s, [0/Θ]s, [0/±Θ/90]s and [90/±Θ/0]s stacking sequences were employed for this study. The present method was favorably compared with Ni and Adams's method. In this study, we found that damping was highly influenced by fiber volume fraction, fiber orientation and stacking sequence.