Logical formalisms equivalent to weighted automata have been the topic of numerous research papers in the recent years. It started with the seminal result by Droste and Gastin on weighted logics over semirings for words. It has been extended in two dimensions by many authors. First, the weight domain has been extended to valuation monoids, valuation structures, etc., to capture more quantitativ...

Background and Aim: Recently, viral diseases of honey bees (Apis mellifera) have presented an increasing threat to beekeeping. This study aimed examine the presence bee viruses in Apis non-Apis species, mite Varroa destructor, pollinated plants Armenia. Materials Methods: Sampling was performed Tavush Province, northeast Republic Armenia, from August November 2019. Overall, 200 A. mellifera bee...

Detailed studies of the electrochemical oxygen reduction reaction (ORR) on catalyst materials are crucial to improving performance different energy conversion and storage systems (e.g., fuel cells batteries), as well numerous chemical synthesis processes. In effort reduce loading expensive platinum group metal (PGM)-based catalysts for ORR in systems, many carbon-based have already shown promis...

Nickel foam (NF), stainless steel wool (SSW), platinum coated stainless steel mesh (Pt), and molybdenum disulfide coated stainless steel mesh (MoS2) electrodes have been proposed as catalysts for hydrogen gas production, but previous tests have primarily examined their performance in well buffered solutions. These materials were compared using twochamber microbial electrolysis cells (MECs), and...

A novel MnO2 nanorods modified screen-printed electrode was fabricated and used as a voltammetric sensor for Sudan determination. were characterized using Field emission-scanning electron microscopy (FE-SEM). Electrochemical measurements performed cyclic voltammetry (CV), linear sweep (LSV), differential pulse (DPV), chronoammperometry (CA). The on the surface act an excellent catalyst oxidatio...

The accumulation of spent carbide (YG8), not only pollutes the environment but also causes waste tungsten, cobalt and other rare metal resources. To better address this issue, we proposed a combined electrochemical separation process low-temperature aqueous solution high-temperature molten salt for tungsten cobalt. H<sub>2</sub>WO<sub>4</sub> was obtained from in an solu...

• Laser-scanning vibrometry successfully discriminated the mechanical behavior of 3D printed specimens produced with different process parameter combinations. Equivalent Elastic Modulus data served to confirm significant influences and interactions between parameters. A model was developed provide elastic modulus values for use in dynamic simulations parts. In this study, we explored suitabilit...

Thanks to unparalleled near-horizon images of the shadows Messier 87* (M87*) and Sagittarius A* (Sgr A*) delivered by Event Horizon Telescope (EHT), two amazing windows opened up us for strong-field test gravity theories as well fundamental physics. Information recently published from EHT about Sgr A*'s shadow lets have a novel possibility exploration Lorentz symmetry violation (LSV) within Sta...