Investigations on femtosecond laser micromachining of single crystal superalloys with and without plasma-sprayed thermal barrier coatings were conducted under laser fluences ranging from 0.1 J/cm up to 160 J/cm. Micromachining was carried out in air using a titanium:sapphire laser system ( = 780 nm) operating at a repetition rate of 1 kHz and delivering individual pulses of ~150 fs duration. Th...

Herein, fully hydrocarbon-based ionomer catalyst coated membranes (CCM)s based on sulfo-phenylated polyphenylene biphenyl (sPPB-H + ) are evaluated in a proton exchange membrane water electrolyzer cell at 70 °C. In conjunction with layers incorporating Nafion® D520 ionomer, sPPB-H require lower applied potential than reference NR112 recast of equal thickness, e.g., 1.66 V vs 1.75 1 A cm −2 . In...

Diamond wire sawing is one of the most widely used methods cutting Al2O3 ceramic because it has good machining accuracy and causes less surface damage. However, its material removal rate (MRR) needs to be improved with increasing demand for parts. In this paper, spark discharges are generated around diamond based on electrochemical discharge (ECDM) process. An oil film-assisted ECDM process app...

The High Court of England and Wales in its November 2020 judgment Municipio de Mariana v BHP Group 1 ( ) declined jurisdiction to hear the case initiated by victims Fundão Dam collapse Brazil on grounds abuse process. decision raises serious questions about Court’s willingness vindicate fair trial rights human abuses linked multinational enterprises (MNEs). In this judgment, Turner J also made ...

The purpose of the current study was to investigate the effects of direct and indirect correctivefeedback on Iranian intermediate EFL learners’ speaking accuracy. This present research aimedto investigate the differential impact of recast and metalinguistic feedback on speakingperformance of EFL learners. To do so, After administering a Nelson test to have ahomogeneous sample a total number of ...

Stellar scintillation is shown to be a good indicator of the upper-air winds near the tropopause. The exclusion principle is recast in the context of a generalized scheme for interspecific interactions.

Infinite integrals involving Bessel functions are recast, by means of an Abel transform, in terms of Fourier integrals. As there are many efficient numerical methods for computing Fourier integrals, this leads to a convenient way of approximating Bessel function integrals.

We recast the problem of calculating Vapnik-Chervonenkis (VC) density into one of counting types, and thereby calculate bounds (often optimal) on the VC density for some weakly o-minimal, weakly quasi-o-minimal, and P -minimal theories.