This paper studies the singularities of Cullen-regular functions of one quaternionic variable, as defined in [7]. The quaternionic Laurent series prove to be Cullen-regular. The singularities of Cullenregular functions are thus classified as removable, essential or poles. The quaternionic analogues of meromorphic complex functions, called semiregular functions, turn out to be quotients of Culle...

It was concluded that there was sufficient evidence about a possible link between long working hours particularly exceeding 50 a week and the risk of significant health outcomes, including cardiovascular disease from literature review by Spurgeon et al.. This study was conducted to find out the single effect of regular overtime work on the cardiovascular functions through objective biological i...

CE MRA NCE MRA p ̃ x ql qu ̃ x ql qu LRA Ost. 5.0 5.0 5.0 5.0 4.5 5.0 0.51 Prox. 5.0 5.0 5.0 5.0 4.5 5.0 0.51 Dist. 4.0 3.0 5.0 3.0 2.8 3.0 0.11 Bran. 2.5 1.8 3.3 1.0 1.0 1.0 0.06 RRA Ost. 5.0 5.0 5.0 5.0 4.3 5.0 0.46 Prox. 5.0 5.0 5.0 5.0 3.5 5.0 0.29 Dist. 4.0 3.0 5.0 2.5 1.8 3.3 0.16 Bran. 2.0 1.8 3.5 1.0 1.0 1.3 0.13 Aorta 5.0 5.0 5.0 5.0 4.8 5.0 0.51 Overall 5.0 4.0 5.0 4.0 2.8 4.0 0.07 Diag...

The preferential oxidation of CO (CO-PrOx) to CO2 is an effective catalytic process for purifying the H2 utilized in proton-exchange membrane fuel cells power generation. Our current work reports on synthesis, characterization and CO-PrOx performance evaluation unsubstituted magnesium-substituted iron- cobalt-based oxide catalysts (i.e., Fe3O4, Co3O4, MgFe2O4 MgCo2O4). More specifically, abilit...

In this paper, we propose a simple variant of the original SVRG, called variance reduced stochastic gradient descent (VR-SGD). Unlike the choices of snapshot and starting points in SVRG and its proximal variant, Prox-SVRG, the two vectors of VR-SGD are set to the average and last iterate of the previous epoch, respectively. The settings allow us to use much larger learning rates, and also make ...

It has been observed that in many optimization problems, nonsmooth objective functions often appear smooth on naturally arising manifolds. This has led to the development of optimization algorithms which attempt to exploit this smoothness. Many of these algorithms follow the same two step pattern: first predict a direction of decrease, and second make a correction step to return to the manifold...

Bacteria have developed an epigenetic phase variation mechanism to control cell surface pili-adhesin complexes between heritable expression (phase ON) and nonexpression (phase OFF) states. In the pyelonephritis-associated pili (pap) system, global regulators [catabolite gene activator protein (CAP), leucine-responsive regulatory protein (Lrp), DNA adenine methylase (Dam)] and local regulators (...

PURPOSE To study the morphologic alterations in the proximal and distal urethral edges from patients submitted to end-to-end bulbar urethroplasty. MATERIALS AND METHODS We analyzed 12 patients submitted to anastomotic urethroplasty to treat bulbar strictures less than 2.0 cm in length. After excision of the fibrotic segment to a 28Fr urethral caliber, we obtained biopsies from the spongious t...

In this paper, we propose a new decomposition approach named the proximal primal dual algorithm (Prox-PDA) for smooth nonconvex linearly constrained optimization problems. The proposed approach is primal-dual based, where the primal step minimizes certain approximation of the augmented Lagrangian of the problem, and the dual step performs an approximate dual ascent. The approximation used in th...