bluuebunny/crossref_metadata_2025 huggingface dataset:
Complete Genome Sequence of the Ice-Nucleation-Active Pseudomonas syringae pv. pisi Isolate MUP32, Isolated from Frost-Damaged Pea (Pisum sativum subsp.
arvense
cv. Dundale) in New South Wales
Authors: Alattas Hussain , Ardley Julie , Swift Rebecca , Kant Pragya , Jackson Sarah , Biddulph Ben , Bekuma Amanuel , Zandberg Jaco , Abraham Sam , Tiwari Ravi , Reeve Wayne
Published: February 2023

The genome of
Pseudomonas syringae
MUP32, which was isolated from frost-damaged pea in New South Wales, Australia, is tripartite and contains a circular chromosome (6,032,644 bp) and two plasmids (61,675 and 54,993 bp). IMG/M genome annotation identified 5,370 protein-coding genes, one of which encoded an ice-nucleation protein with 19 repetitive PF00818 domains.
Genome Sequence of Alongshan Virus from Ixodes ricinus Ticks Collected in Switzerland
Authors: Stegmüller Stefanie , Fraefel Cornel , Kubacki Jakub
Published: February 2023

Here, we report the detection of an Alongshan virus (ALSV) strain in Switzerland. Next-generation sequencing of homogenates from
Ixodes ricinus
ticks collected in Canton Grisons, Switzerland, in 2022 yielded a coding-complete ALSV genome.
Erratum to: Several Articles in JETP Letters
Authors: Shaulov S. B. , Ryabov V. A. , Shepetov A. L. , Pyatovsky S. E. , Zhukov V. V. , Kupriyanova E. A. , Gudkova E. N. , Gavrilyuk Yu. M. , Gangapshev A. N. , Derbin A. V. , Drachnev I. S , Kazalov V. V. , Kuzminov V. V. , Mikulich M. S. , Muratova V. N. , Tekueva D. A. , Unzhakov E. V. , Yakimenko S. P. , Sazonov S. V. , Bantysh B. I. , Katamadze K. G. , Bogdanov Yu. I. , Gerasimov K. I. , Minnegaliev M. M. , Urmancheev R. V. , Moiseev S. A. , Zudin I. Yu. , Gushchin M. E. , Strikovskiy A. V. , Korobkov S. V. , Petrova I. A. , Katkov A. N. , Kochedykov V. V. , Bondarenko S. , Zubkov M. A.
Published: February 2023

An Erratum to this paper has been published: https://doi.org/10.1134/S0021364022390011
Excitation Spectrum in an Ensemble of Hubbard Bosons
Authors: Val’kov V. V.
Published: February 2023

An approach that makes it possible to correctly derive equations describing the Bose–Einstein condensation and the spectrum of elementary excitations in the ensemble of Hubbard bosons in the strong correlation regime $$(U \gg {\text{|}}{{t}_{{fm}}}{\text{|}})$$ has been developed in the atomic representation using the Dyson method with the introduced indefinite metric. The kinematic Dyson interaction caused by the properties of the commutation relations of dynamic variables plays an important role in such a system. An effective Hamiltonian has been obtained using the operator form of perturbation theory at finite U values. It has been shown that the properties of the ensemble of Hubbard bosons have been determined by the kinematic interaction, correlated hopping, and the attraction between Hubbard bosons. Numerical calculations have demonstrated the effect of these interactions on the characteristics of the energy spectrum of excitations of the ensemble of Hubbard bosons and on the dependence of the density of condensate particles on the density of bosons in the system.
Relativistic Tunneling Ionization in Crossed Petawatt Laser Beams
Authors: Popruzhenko S. V.
Published: February 2023

A scheme is proposed for a two-beam experiment on multi-petawatt laser systems aimed at searching for relativistic effects in electron tunneling from deep levels of multiply charged ions. It is shown that the most efficient relativistic ionization will occur in the field of a standing wave that arises in the case of counter-propagating beams. Estimates are given showing that the observation of relativistic effects during the ionization of $$s$$-states of hydrogen-like ions with charge $$Z = 80{-} 90$$ is potentially possible at laser intensity in the beam overlap domain $$ \simeq {\kern 1pt} $$1025 W/cm2.
Analytical investigations on non-minimally coupled scalar fields outside neutral reflecting shells
Authors: Peng Yan
Published: February 2023

We study the existence of scalar fields outside neutral reflecting shells. We consider static massive scalar fields non-minimally coupled to the Gauss–Bonnet invariant. We analytically investigated properties of scalar fields through the scalar field equation. In the small scalar field mass regime, we derive a compact resonance formula for the allowed masses of scalar fields in the composed scalar field and shell configurations.
Fabrication, structure, and luminescent properties of Cr-doped CaMgSi2O6 fluorescent ceramics
Authors: Wen Ying , He Chongjun , Wen Yiyang , Dong Biao , Deng Chenguang , Li Qian , Lu Yuangang
Published: February 2023

Chromium-doped CaMgSi2O6 ([Formula: see text]: CMS) fluorescent ceramics with various concentrations were fabricated using solid-state reaction technique. All the samples were sintered at 1250[Formula: see text]C for 3 h. Analysis of microstructure of the Cr[Formula: see text]: CMS ceramics shows homogeneous structure with grain size distributions between 0.86 nm and 2.26 nm. Luminescent spectra of the ceramics show two emission peaks, a strong peak at 872 nm and a weak peak at 960 nm because of [Formula: see text] transition of the Cr[Formula: see text] ions. Intensity of the emission peaks increases with Cr[Formula: see text] concentration, reaches maximum with 0.1 at.% Cr[Formula: see text], then decreases with higher Cr[Formula: see text] concentration. Owing to the differences in crystal field strength, the luminescent properties of the Cr[Formula: see text]: CMS fluorescent ceramics and powder are quite different.
Tectonic development, thermal regimes and hydrocarbon habitat of transform margins, and their differences from rifted margins – an introduction
Authors: Nemčok M. , Doran H. , Doré A. G. , Ledvényiová L. , Rybár S. , Staniaszek S. , Gontar T.
Published: February 2023

Drilling, 3D seismic and deep seismic studies in recent years have significantly progressed our knowledge of continental margins. Some of the key studies are brought together in this volume, focusing on the evolution and architecture of transform faults and transform margins, giving special attention to the relationship, and differences, between transform and rift margins. Papers from a wide range of global settings consider thermal history, depositional regime, hydrocarbon prospectivity and (in a continental setting) geothermal potential. This scene-setting paper examines our current state of knowledge on transform and rift settings, and provides a brief introduction to the subject matter and context of the papers in the volume.
Speculative Histories, Just Futures: From Counterfactual Artifacts to Counterfactual Actions
Authors: Forlano Laura E. , Halpern Megan K.
Published: February 2023

This article engages with history as a speculative space for the purpose of critically engaging with discourses around the politics of technology in HCI. Drawing on approaches within critical design and based on evidence from two different projects, we develop an approach,
counterfactual actions
, that moves beyond the creation of artifacts and towards more situated, embodied, and performative engagements. In one project, Reimaging Work, we used a participatory game to engage stakeholders from social and economic justice organizations in Chicago. The other project, Future Design Studio, invited audience members at a futurist festival to create artifacts from the future and then invited improvisational actors to build worlds around them. We argue that a focus on counterfactual actions supports a more relational approach to understanding the politics of socio-technical systems and infrastructures, allowing participants to gain a meaningful understanding of the ways in which technology could be designed otherwise in line with ethics, values and social justice concerns.
MWPoW+: A Strong Consensus Protocol for Intra-Shard Consensus in Blockchain Sharding
Authors: Xu Yibin , Shao Jianhua , Slaats Tijs , Düdder Boris
Published: February 2023

Blockchain sharding splits a blockchain into several shards where consensus is reached at the shard level rather than over the entire blockchain. It improves transaction throughput and reduces the computational resources required of individual nodes. But a derivation of trustworthy consensus within a shard becomes an issue as the longest chain based mechanisms used in conventional blockchains can no longer be used. Instead, a vote-based consensus mechanism must be employed. However, existing vote-based Byzantine fault tolerance consensus protocols do not offer sufficient security guarantees for sharded blockchains. First, when used to support consensus where only one block is allowed at a time (binary consensus), these protocols are susceptible to progress-hindering attacks (i.e., unable to reach a consensus). Second, when used to support a stronger type of consensus where multiple concurrent blocks are allowed (strong consensus), their tolerance of adversary nodes is low. This article proposes a new consensus protocol to address all these issues. We call the new protocol
MWPoW
+, as its basic framework is based on the existing Multiple Winners Proof of Work (MWPoW) protocol but includes new mechanisms to address the issues mentioned previously. MWPoW+ is a vote-based protocol for strong consensus, asynchronous in consensus derivation but synchronous in communication. We prove that it can tolerate up to
f
<
n
/2 adversary nodes in a n-node system as if using a binary consensus protocol and does not suffer from progress-hindering attacks.
Green and Black Tea Characterization By Electrochemical and UV-Vis Spectroscopy Techniques for Bioelectronic Applications
Authors: Molina Jeniffer , Flores Aurora , Manzo Robledo Arturo , Gutierrez Juan Manuel
Published: February 2023

Green tea and black tea are the most widely consumed beverages worldwide. Consequently, it is common to employ complex techniques for qualitative analysis and quality control (QC) practices to verify the purity of tea. Electrochemical and optical techniques have become relevant in such analysis as they are fast, accurate, and less expensive than conventional analytical techniques [1]. In the present work, the evaluation of green and black tea of a high-consumption Mexican brand was carried out through electrochemical techniques using a graphite electrode as working electrode (WE) and KCl as supporting electrolyte (SE), and UV-Vis spectroscopy. The i-E profiles obtained make it possible to qualitatively identify these tea varieties for QC and perform Principal Component Analysis (PCA) to analyze the information.
Cyclic Potentiodynamic Polarization on Titanium Alloys Anodizing in Alkaline Solutions
Authors: Salgado Joel , Gaona Tiburcio Citlalli , Jáquez-Muñoz Jesús Manuel , Martínez-Ramos C. , Zambrano Robledo Patricia del Carmen , Lara Banda Maria del Refugio , Estupiñán-Lopez F. , Almeraya Calderón Facundo , Cabral Miramontes José Ángel
Published: February 2023

Titanium alloys are used in different industries such as biomedical, aerospace, aeronautic, chemical, and naval. Those industries have high requirements with few damage tolerances. The aim of this work was to study the corrosion behavior of titanium alloys anodizing and non-anodizing in alkaline (KOH and NaOH) solutions, exposed in 3.5%wt. NaCl and 3.5% wt. H2SO4 solutions at room temperature using cyclic potentiodynamic polarization (CPP) according to standards to obtain electrochemical parameters as the passivation range (PR), corrosion type, passive layer persistence, corrosion potential (Ecorr), and corrosion rate. The alloy Ti Beta-C anodized presented better corrosion resistance than Ti-6Al-4V in both media. The smallest corrosion rate is presented in Beta-C samples (4.72 E-8 A/cm2) and the highest corrosion rate is CP2 (1.61 E-5 A/cm2)
Electrochemical Evaluation of Hydrotalcite Mg /Al with Caffeine in the Protection in AZ31 Alloy
Authors: Acosta Gordillo Yordhi , Espinoza Vazquez Araceli , Rodríguez Francisco , Flores Álvarez J. F. , Negrón Silva Guillermo E. , Delgado Reyes G. , Orozco Cruz Ricardo , Galván Martínez Ricardo
Published: February 2023

The present work is an electrochemical evaluation of hydrotalcite Mg/Al impregnated with caffeine for the protection of the AZ31 alloy, where different concentrations of the inhibitor were evaluated to determine the best result in order to be applied as a coating in orthopedic uses. The efficiency of the hydrotalcite coating as a function of concentration was determined using electrochemical impedance spectroscopy and it was shown that HT MgAl with 5 ppm perezone impregnated achieved 99% inhibition efficiency.
Electrochemical Evaluation of 3´-(2,6-dimethoxybenzoyl)-Benzyl 2,6-Dimethoxybenzoate As a Corrosion Inhibitor in API 5L X70 Immersed in Saline Medium
Authors: Hernández Olivé O. J. , Vazquez Araceli , Mejía-Sánchez Edgar , Pérez Vásquez Araceli , Mata Rachel , Galván Martínez R. , Hernandez Miguel Ángel , Carmona-Hernandez Andrés , Orozco Cruz Ricardo
Published: February 2023

In the present work, the compound 3´-(2,6-dimethoxybenzoyl)-benzyl 2,6-dimethoxybenzoate (RM4) was evaluated for its ability as a corrosion inhibitor in a 3% chloride medium and using an API 5L X70 steel working electrode. The electrochemical system was evaluated by electrochemical techniques such as polarization curves (CP) and electrochemical impedance spectroscopy (EIS), finding through the values obtained in polarization curves that the efficiency of the inhibitor at 50 ppm reached 73.2% against the corrosion phenomenon. The inhibition kinetics study shows that the evaluated organic compound maintains its protection against corrosion in a period of 120 hours of immersion.
Design and Implementation of a Rotating Hydrodynamic System for Electrochemical Noise Measurement.
Authors: Cando Luis , Hernandez Miguel Ángel , Delgado Reyes G. , Galván Martínez R. , Orozco Cruz Ricardo
Published: February 2023

Corrosion is a concern for the oil industry. According to the NACE, this phenomenon can cause problems that cost millions of dollars annually, putting people and the environment at risk. To combat this phenomenon, corrosion-reducing control practices must be implemented. It must be measured with sensitive tools and equipment. As a result, the current study proposes creating a laboratory prototype with the primary goal of simulating the dynamic operation of the rotating cylinder electrode (RCE). A rotating cylinder electrode (PRCE) laboratory prototype is constructed using an experimental methodology based on RCE physical-mechanical characterization, mathematical modeling of its actuators (brushless motors), and electronic instrumentation. This methodology enables the design and implementation of a control system to manipulate the rotation speed of the RCE stem in the evaluation of electrochemical noise, allowing for the rejection of external disturbances and the monitoring of references in a turbulent flow. The PRCE's control section's design, when compared to currently available equipment, allows for cost, acquisition, and maintenance savings (RCE). Following that, the correct design of the PRCE prototype will be validated.
Electrochemical Study of an ASTM A36 Steel with an Epoxy Coating Reinforced with SiO2 Nanoparticles.
Authors: Ramírez Fernández José Arturo , Vázquez Araceli ESPINOZA , León Sánchez Jorge Alejandro , Carmona-Hernandez Andrés , Orozco Cruz Ricardo , Galván Martínez R.
Published: February 2023

The ASTM A36 structural steel was evaluated with the electrochemical techniques, Linear Polarization Resistance (LPR), Electrochemical Impedance Spectroscopy (EIS) and Electrochemical Noise (EN). The techniques were applied to the bare steel substrate, coated, and coated with the addition of SiO2 nanoparticles (NP). The applied coating was a commercial epoxy of two layers. Stöber method was used to obtain the NP and were characterized with X-Ray Diffraction. A coating improved was obtained in the first day of immersion, according to EIS results, that it shows higher impedance compared with the coating without NP. Moreover, with the RE it was possible to observe that the NP reinforced coating showed a better anticorrosive performance, having a localized and mixed corrosion morphology.
Evaluation of a Non-Ionic Gemini Surfactant as Sweet Corrosion Inhibitor for X100 Steel in Sweet Brine Solution
Authors: Sanchez Garrido Rolando Abraham , Vazquez Araceli ESPINOZA , Campechano-Lira Clarisa , Vázquez Vélez Edna , Vázquez Márquez Alejandra , Orozco Cruz Ricardo , Galván Martínez R. , Carmona-Hernandez Andrés
Published: February 2023

In the present research work, the evaluation of a non-ionic gemini surfactant derived from palm oil named bis(2-((2-palmitoamidoethyl) amino) ethyl) 1H-imidazole-4,5-dicarboxylate as an ecological corrosion inhibitor of X100 steel immersed in NaCl solution at 3.5% saturated with carbon dioxide (CO2) was analyzed. The electrochemical tests performed by Polarization Curves (PC) and Electrochemical Impedance Spectroscopy (EIS) showed that the efficiency of the inhibitor increased according to the increase in the concentration of the inhibitor. Likewise, the EIS results showed that the inhibitor performance increased as the exposure time elapsed.
Electrochemical Evaluation of the Metal-Media Interface of a Calcareous-Formed Al-Base Alloy Immersed in a Synthetic Seawater Solution
Authors: Rico Juan Pablo , Galván Martínez Ricardo , Vazquez Araceli Espinoza , Carmona-Hernandez Andrés , Vázquez Márquez Alejandra , Martínez Cosío María de los Angeles , Mejía-Sánchez Edgar , Hernandez Miguel Ángel , Orozco Cruz Ricardo
Published: February 2023

Corrosion occurs in any environment where a metallic structure interacts with the surrounding environment, being the marine environment one of the most corrosive environments and therefore the one that deteriorates metals the most. The cathodic protection systems are the fundamental way to protect metallic structures in marine environments being a highly effective method, besides, as a reaction product of the cathodic protection system, calcareous deposits (CaCO3 and Mg (OH)2) are formed on the structures. One type of cathodic protection system is sacrificial anodes, among which Al-based anodes have been widely used. Al-Zn-X (In-Hg-Sn) alloys have shown an optimum performance as sacrificial anodes in seawater, but with a limitation which is the environmental contamination that some of its components can generate. The purpose of the present work of investigation was the variation of the electrochemical behavior of an Al-Zn-Mg alloy with a calcareous deposit. Evaluating this variation by Rp and EIS techniques, getting preliminarily that the formation of calcareous deposits generates a natural protective barrier on the structure of the alloy.
Influence of the Martensite Phase of the Cu-9Al-3Ag Alloy and Its Corrosion Behavior in NaCl-Containing Media
Authors: Flores-Sanchez Daniel , Suárez-Rosales Miguel Ángel , Gutierrez-Arzaluz Mirella , Palomar-Pardavé Manuel , Romero-Romo Mario
Published: February 2023

The present investigation shows the influence of the microstructure resulting from the heat treatment termed betatization of an aluminum bronze containing Cu-9Al-3Ag alloy, in as-cast and heat-treated samples immersed in 0.5M NaCl-containing media with all experiments conducted at 25 ºC. The said treatment corresponds to heat saturation conditions in the phase region where the beta phase predominates in the microstructure. The corrosion behavior was recorded through using cyclic voltammetry and potentiodynamic polarization techniques, supplemented by OCP recordings. The results obtained through the polarization curves showed that at more positive potentials the current density decreases considerably, which is attributed to the formation of corrosion products on the surface of the working electrode.
Electrochemical Quantification of Dopamine in Presence of Ascorbic Acid with a Glass Carbon Electrode Modified with Poly5aphen Polymerized from a Deep Eutectic Solvent
Authors: Godoy Colin Estefania , Corona-Avendaño Silvia , Romero Romo Mario Alberto , Vázquez-Huerta Gerardo , Aldana Jorge , Ramirez-Silva Maria Teresa , Palomar-Pardavé Manuel
Published: February 2023

In this work, the surface of a glassy carbon electrode (GCE) was modified with the polymer of 5-Amino-1-10 phenanthroline (5Aphen), Poly5Aphen, from a deep eutectic solvent (DES). The electrochemical response of the modified electrode (GCE/Poly5Aphen) was established regarding the oxidation of dopamine (DA) in the presence of ascorbic acid (AA) that is one of its major interferents. The results obtained by cyclic voltammetry (CV) showed that it is possible to polymerize 5Aphen on the surface of the GCE when using a DES. On the other hand, the results by CV and differential pulse voltammetry (DPV) showed that, unlike the bare GCE, when using the GCE/Poly5Aphen electrode it is possible to separate the electrochemical signal of the DA and AA as result of their simultaneous oxidation over the modified surface of the electrode.
The Electrical Properties of Zr Doped Ce0.6Y0.4O2-
δ Solid Electrolytes for Solid Oxide Fuel Cell Applications
Authors: Bocardo-Roldán Celeste , Díaz-Guillén J.a. , Díaz-Guillén J.C. , Fuentes Antonio Fernandez , Padmadas Padmasree K
Published: February 2023

Ionic conducting solid electrolytes based on doped ceria has been studied widely. In this work, we are studying the effect of Zr4+ substitution on the solid electrolyte system Ce0.6-xZrxY0.4O2-δ where x = 0, 0.2, 0.4, and 0.6. The samples were synthesized by mechanical milling and the evolution of their structure with milling time was analyzed by X-ray diffraction (XRD). The milled powders were uniaxially pressed and sintered at different temperatures (1200 and 1500 °C) and the morphology was analyzed by scanning electron microscopy (SEM) and the electrical properties were measured using impedance spectroscopy. XRD analysis shows the formation of fluorite type cubic phases after 20 h of milling and with increasing the sintering temperature from 900 to 1200 °C shows the transformation of cubic fluorite phase to a tetragonal phase. The analysis of electrical properties shows a decrease in conductivity with the substitution of Zr4+ in Ce0.6-xZrxY0.4O2-δ oxide.
Electrochemical Evaluation of Phosphated Galvanized Steel
Authors: Lugo Islas Gabriela , Gallardo Castán Ernesto , Ocaña Badillo Jehú Alan , Chavez Rosales Rosario , Garcia Navarro Norma , Galicia Aguilar Gonzalo , Ramírez Reyes José Luis , Galicia Badillo Aurora Edelmira
Published: February 2023

In this paper, the behavior of corrosion in phosphated galvanized steel without defect and with surface defect is evaluated in electrolyte solutions of sodium chloride at a concentration of 3% and sodium sulfate 0.1 M with the objective of simulating the marine environment with presence of chlorides, and sulfates for the industrial environment. In the experimental methodology, samples of phosphated galvanized steel are used, each of the samples were exposed in the electrolyte of sodium chloride at a concentration of 3% and 0.1 M sodium sulfate. The phosphated galvanized steel was evaluated with electrochemical techniques Lineal Polarization Resistance, Electrochemical Impedance Spectroscopy and Potentiodynamic Curves in order to study and predict the corrosion behavior that can be obtained according to the type of electrolyte. Regarding the final result in both cases, both for the plate with defect and without defect, a greater effect of corrosion was observed in galvanized steel exposed in NaCl compared to Na2SO4. Phosphate protection influenced the corrosive processes produced by the solutions, since phosphates slow down the corrosion process. When the exposure time elapses, a thicker layer of possible corrosive products is generated, retarding the effects of corrosion.
Electrochemical Detection of Pb2+ and Cd2+ Ions in Aqueous Samples Employing Modified Carbon Paste Electrodes (β-cyclodextrin and p-coumaric Acid)
Authors: Santiago-Luna Diana Fernanda , Galicia Luis Laura , Valdés-Ramírez Gabriela
Published: February 2023

This work shows the results of the electrochemical detection of Pb2+ and Cd2+ions by employing β-cyclodextrin and p-coumaric acid, modified carbon paste electrodes. The quantification is performed by applying anodic stripping voltammetry in real water samples untreated and treated with an acidic digestion, which is found to be required in order to destroy organic compounds that mask ions’ existence in the samples.
Electrochemical Evaluation of 18 Gauge Galvanized Steel Exposed to the Poza Rica Atmosphere
Authors: Triana Luna Daniel , Gallardo Castán Ernesto , Lugo Islas Gabriela , Garcia Navarro Norma , Ramírez Reyes José Luis , Galicia Aguilar Gonzalo
Published: February 2023

In this work, the corrosive behavior of commercial galvanized steel is evaluated with and without surface defects exposed to rainwater in the atmosphere of Poza Rica, Veracruz. In the experimental methodology, two 18-gauge galvanized steel samples of commercial grade were used, one with a defect and the other without, these were exposed for 42 days in rainwater, electrochemical tests were performed every 7 days of: Linear Polarization Resistance (LPR), Electrochemical Impedance Spectroscopy (EIS) and Potentiodynamic Polarization Curves, which allows us to inquire of the behavior of galvanized steel in terms of oxidation. Galvanized steel presented resistance to corrosion because zinc forms corrosion products on its surface that protects galvanized steel from corrosion. However, the degradation is differentiated; the sample without defect presents higher corrosion during the first 21 days compared to the sample with across defect that had lower corrosion, reaching the passivation zone earlier.
Low-Energy Electrodeposition of Nickel in Electroplating Wastewater Using a Water Hyacinth Separated Double Chamber Electrodeposition Cell
Authors: Putra Herlian Eriska , Permana Dani , Djaenudin Djaenudin
Published: February 2023

Nickel ions are highly present in wastewater from the electroplating industry because the galvanizing process only uses 30%–40% of nickel. The objectives of this study are to investigate the effect of electrolyte support, voltage, anolyte solution, and anode type on removal efficiency, current efficiency, and specific energy on water hyacinth-separated double chamber electrodeposition cell (DCEC) and to simulate wastewater treatment based on the optimized variables. We optimized the reaction conditions using artificial wastewater containing 2200 mg l−1 of nickel. We then simulated the electrodeposition using the optimized conditions and obtained the optimal operating conditions: 8 h of process time, a voltage of 3.48 V, and NaCl and H2SO4 concentrations of 1.5 and 1.4 M, respectively. At these optimum conditions, the predicted removal efficiency was found to be 68.73%. The current efficiency and specific energy were relatively low which was a similar efficiency of 28%. The reaction rate constants at reaction orders 1 and 2 in the electroplating industrial waste electrodeposition process were 0.1324 s-1 (R2 = 0.846) and 0.0001 s-1 (R2 = 0.913), respectively. This study contributes to further research and development of electrodeposition as a promising technology for the removal and recovery of toxic metal ions from wastewater with affordable m.
Hexagonal Boron Nitride as Anode for Sodium Ion Battery – A Reality Check!
Authors: Garg Shubham , Parmar Avanish Singh , Rosy Rosy
Published: February 2023

Sodium-ion batteries (SIBs) have gained enormous attention as an alternative electrochemical energy storage system. A significant challenge for their practical viability is finding an anode material that can provide high specific capacity along with good cycling stability. Recently, numerous theoretical works have proposed hexagonal boron nitride (hBN) as a promising anode material for SIBs. Nevertheless, there has been no reported experimental verification for these theoretical claims. To fill the knowledge gap, the electrochemical performance of hBN has been investigated under the capacity of a potential anode for SIBs. The effect of particle morphology on the electrochemical performance of hBN has also been investigated using bulk hBN powder and nanoplatelets hBN as active materials. Unexpectedly, hBN showcased minimal charging capacity with effectively no reversible intercalation/de-intercalation of Na-ions. The obtained results provide experimental insight into the ineffectiveness of hBN in serving as SIB anode material, unlike the previous theoretical claims. We believe it is essential to report these discrepancies in the computational and experimental findings for the benefit of experimentalists working enthusiastically to explore and develop new anode materials related to boron nitride systems.
Effect and Mechanism of Cu Foams with Different Porosity on Kinetic Parameters of Ga Electrodeposition: Accompanied by Hydrogen Evolution Reaction
Authors: Liu Ling , Dong Binxin , Cai Chuchu
Published: February 2023

The process of Ga electrodeposition is usually accompanied by intense hydrogen evolution reaction, so the escape rate of hydrogen bubbles from the electrode surface has a great influence on Ga electrodeposition. In this paper, Cu foams with different porosity are applied to research the effect of escape rate of hydrogen bubbles on Ga electrodeposition. When Ga electrodeposition is controlled by mass transport process, Cu foams with high porosity exhibit a higher reaction rate of Ga electrodeposition because of its faster bubble escape rate. The larger pore channel diameter of Cu foam with low porosity reduces the escape rate of hydrogen bubbles and hinders the mass transfer process. The addition of surfactant accelerates the escape rate of bubbles from the electrode surface, thus promoting the mass transfer process and leading to the increase of the current efficiency of Ga electrodeposition. It is also found that the process of Ga electrodeposition is controlled by nucleation rate at the early stage. Due to the rapid separation of hydrogen bubbles, Cu foams with high porosity provide more effective sites per unit surface area. Therefore, Cu foams with high porosity have a higher nucleation rate and a lower induced time for Ga electrodeposition.
High Crystallinity Ge Growth on Si (111) and Si (110) by Using Reduced Pressure Chemical Vapor Deposition
Authors: Yamamoto Yuji , Wen Wei-Chen , Schubert Markus Andreas , Corley-Wiciak Cedric , Tillack Bernd
Published: February 2023

A method for high quality epitaxial growth of Ge on Si (111) and Si (110) is investigated by reduced pressure chemical vapor deposition. Two step Ge epitaxy (low temperature Ge seed and high temperature main Ge growth) with several cycles of annealing by interrupting the Ge growth (cyclic annealing) is performed. In the case of Ge seed layer growth below 350 °C for (111) and 400 °C for (110) orientation, huge surface roughening due to too high dislocation density is observed after the following annealing step. For both crystal orientations, a high crystallinity Ge seed layer is realized by combination of 450 °C growth with 800 °C annealing. Once the high-quality Ge seed layer is deposited, high crystal quality Ge can be grown at 600 °C on the seed layer for both crystal orientations. For the 5 μm thick Ge layer deposited with the cyclic annealing process at 800 °C, a Si diffusion length of ∼400 nm from the interface, RMS roughness below 0.5 nm and threading dislocation density of 5 × 106 cm−2 are achieved for both (111) and (110) substrates.
Serum from Adolescents with High Polyphenol Intake Exhibits Improved Lipid Profile and Prevents Lipid Accumulation in HepG2 Human Liver Cells
Authors: Augimeri Giuseppina , Avolio Ennio , Caparello Giovanna , Galluccio Angelo , De Rose Daniela , Vivacqua Adele , Morelli Catia , Barone Ines , Catalano Stefania , Andò Sebastiano , Giordano Cinzia , Sisci Diego , D’Angelo Stefania , Bonofiglio Daniela
Published: February 2023

The traditional Mediterranean diet (MD) is characterized by a high phenolic-rich food intake, including in particular vegetables and fruits, but also legumes, whole grain cereals, nuts, and extra virgin olive oil. Evidence for beneficial effects of polyphenols in humans depends on the amount consumed and on their bioavailability. Here, we evaluated the association between the estimated polyphenol intake by fruits and vegetables food source and serum biochemical parameters in healthy adolescents, recruited into the DIMENU research project. Categorizing adolescents into three groups according to their estimated total polyphenol intake, we found that adolescents who declared high consumption of polyphenols had a higher adherence to the MD and had a better serum lipid profile than adolescents consuming low amounts of polyphenols. Moreover, using human HepG2 liver cells treated with oleic acid as an in vitro model for studying lipid accumulation, we showed that intracellular lipid accumulation is alleviated by serum from adolescents consuming a polyphenol-rich diet following MD recommendations. Our data underline the importance of promoting adherence to the typical MD foods as a superior strategy to prevent metabolic and chronic diseases and to ensure a better quality of life among adolescents.
Discrete Extension of Poisson Distribution for Overdispersed Count Data: Theory and Applications
Authors: Eliwa Mohamed S. , Ahsan-ul-Haq Muhammad , Almohaimeed Amani , Al-Bossly Afrah , El-Morshedy Mahmoud
Published: February 2023

In this study, a new one-parameter discrete probability distribution is introduced for overdispersed count data based on a combining approach. The important statistical properties can be expressed in closed forms including factorial moments, moment generating function, dispersion index, coefficient of variation, coefficient of skewness, coefficient of kurtosis, value at risk, and tail value at risk. Moreover, four classical parameter estimation methods have been discussed for this new distribution. A simulation study was conducted to evaluate the performance of different estimators based on the biases, mean related-errors, and mean square errors of the estimators. In the end, real data sets from different fields are analyzed to verify the usefulness of the new probability mass function over some notable discrete distributions. It is manifested that the new discrete probability distribution provides an adequate fit than these distributions.
[Retracted] Study on the Mechanism of Pathological Recognition Based on Bioelectrical Impedance Spectrum to the Elbow Joint
Authors: Gao Guodong , Pan Li , Zhang Ping , Su Kai , Zhao Jirong
Published: February 2023

The elbow joint is prone to stiffness and adhesion after trauma or surgery. High‐energy trauma easily led to loss of mobility of the elbow joint. Mild trauma can also cause stiffness in the elbow joint. In order to investigate the pathogenesis of stiffness and adhesion in elbow joint, a feedback‐type elbow joint control system based on network is proposed in this paper. The simulation results show that it has significant differences in elbow bioelectrical impedance in patients with elbow trauma, and this new method realizes the control strategy of converting the patient’s elbow joint pathological information into elbow joint orthosis control information.
Blockchain-Based Cyber Threat Intelligence Sharing Using Proof-of-Quality Consensus
Authors: Chatziamanetoglou Dimitrios , Rantos Konstantinos
Published: February 2023

Cyber threat intelligence (CTI) is contextualised knowledge, built on information that is collected, processed, analysed, and disseminated to the right audience, in order to comprehend a malicious threat actor’s motivation, goals, objectives, targets, and attack behaviours. The CTI value increases by the ability to be shared, consumed, and actioned timely, by the right stakeholders, based always on quality standards and parameters, which boost the cyber security community to understand how adversaries act and to counter the constantly emerging sophisticated cyber threats. In this article, along with the identification of research gaps, after a comparison between existing research studies in the similar scope of CTI evaluation and sharing mechanisms, we propose a blockchain-based cyber threat intelligence system architecture, which collects, evaluates, stores, and shares CTI, enabling tamper-proof data and exclusion of untrustworthy evaluation peers, while evaluating, at the same time, the quality of CTI Feeds against a defined set of quality standards. The evaluation of the data is performed utilising a reputation and trust-based mechanism for selecting validators, who further rate the CTI feeds using quality-based CTI parameters, while the consensus for preserving the fairness of the results and their final storage is performed via the recently introduced proof-of-quality (PoQ) consensus algorithm. The data, which are stored in the proposed ledger, constitute a reliable, distributed, and secure repository of CTI Feeds and contain their objective evaluation, as well as the performance of the validators who participated in each evaluation, while these data can be further used for assessing the reputation of CTI Sources. Finally, in order to assess the proposed system’s reliability, integrity, and tolerance against malicious activities, the model is subject to a theoretical analysis using a probabilistic simulation, taking into account various aspects and features of the integrated mechanisms. The results show that the tolerance against malicious validators is acceptable, even when the ratio between legitimately vs. maliciously behaving validators is 1 : 50.
Spatial Distribution and Evolution of pH as a Function of Cation Exchange Capacity, Sum of Exchangeable Bases, and Organic Matter and Aluminum in the Soils of Foumban
Authors: Lotse Tedontsah Vivien Piercy , Mbog Michel Bertrand , Bitom-Mamdem Lionelle , Ngon Ngon Gilbert François , Edzoa Robert Christel , Tassongwa Bernard , Bitom Dieudonné , Etame Jacques
Published: February 2023

Foumban, located in the Noun valley in western Cameroon, is a prime location for food production. However, this locality is experiencing a significant decline in productivity due to the acidity of its soil. This acidity is linked to the behaviour of certain soil properties essential for plant growth. The present work aims to study the behaviour of pH as a function of certain chemical parameters such as CEC, organic matter, exchangeable bases, and exchangeable aluminum and to map the spatial structure of the pH parameter by kriging. To achieve this objective, ninety soil samples were taken in the locality of Foumban and sent to the soil laboratory where physicochemical analyses were carried out. The results obtained were processed by statistical and geostatistical software. This made it possible to establish relationships between pH and other soil properties. The obtained R2 results show that pH-exchangeable aluminum and pH sum of bases are strongly correlated while pH-CEC and pH-organic matter are weakly correlated. For the spatial distribution of pH, the Gaussian model was applied to fit the experimental semivariogram. The low values of the semivariogram of the pH-water contents obtained overall reflect a strong correlation of the values. The spatial structure obtained after kriging defines two groups of soils in the study area according to their acidity: acidic soils which cover about 82.4% of the study area and moderately acidic soils which occupy about 17.6% of the study area. Finally, it appears that acidity remains a real problem for the soils of Foumban. The risks of aluminum toxicity should not be overlooked. The rate of use of ammonia fertiliser in the study area should be reduced, especially in soils with a pH below 5.4. The use of strong base inputs such as calcium carbonate (CaCO3) or calcium hydroxide (Ca (OH)2) at normal doses is strongly recommended in acid soils.
The Role of Digital Platforms in Women’s Entrepreneurial Opportunity Process: Does Online Social Capital Matter?
Authors: Hammad Rasha , El Naggar Rasha
Published: February 2023

In response to investigating the role of IT on entrepreneurs, this research increases the understanding of the impact of online social capital created and developed on social media platforms regarding the entrepreneurial opportunity process of nascent female entrepreneurs. To fulfill that, this research employed the mixed-method approach allowing two phases to complement and prevent unjustified findings. In the two phases, a multilevel model that incorporates entrepreneurial capacity and resource acquisition as mediating variables is created, justified, and investigated. In the first phase, the researchers use Natural Language Processing (NLP) by analyzing big data on social media communities, followed by a quantitative confirmatory study using SmartPLS 3.3 in the second phase. Results show that nascent female entrepreneurs use online social capital, especially bridging social capital, to develop their entrepreneurial capacity and to access resources, both necessary to recognize and exploit entrepreneurial opportunities.
Comparison of Four Intrapartum Cardiotocography Classifications for Predicting Neonatal Acidemia at Birth
Authors: Troha Nika , Razem Katja , Luzovec Ursa , Lucovnik Miha
Published: February 2023

Objective. To compare diagnostic values of four intrapartum cardiotocography (CTG) classifications in predicting neonatal acidemia at birth. Methods. Retrospective case-control study. Forty-three CTG traces with an umbilical artery

pH
<
7.00

(study group) and 43 traces with a

pH
≥
7.00

(control group) were analyzed. Inclusion criteria were singleton pregnancy, cephalic presentation, admission to labour ward during active phase of first stage of labour, and gestational age 37+0 to 41+6 weeks. Exclusion criteria were suspected intrauterine growth restriction, oligohydramnios, polyhydramnios, pregestational or gestational insulin-dependent diabetes mellitus, and preeclampsia. Last 30-60 minutes before delivery of CTG traces was classified retrospectively according to four classification systems—International Federation of Gynecology and Obstetrics (FIGO), Royal College of Obstetricians and Gynaecologists (RCOG), National Institute of Child Health and Human Development (NICHD), and the 5-tier system by Parer and Ikeda. Predictive value of each classification for neonatal acidemia was assessed using receiver operating characteristics (ROC) analysis. Results. FIGO, RCOG, and NICHD classifications predicted neonatal acidemia with areas under the ROC curves (AUC) of 0.73, 95% confidence interval (CI) 0.63-0.84; 0.72, 95% CI 0.60-0.83; and 0.69, 95% CI 0.57-0.80, respectively. The five-tier system by Parer and Ikeda had significantly better predictive value with an AUC of 0.96, 95% CI 0.91-1.00. Conclusions. The 5-tier classification system proposed by Parer and Ikeda for assessing CTG in labour was superior to FIGO, RCOG, and NICHD intrapartum CTG classifications in predicting severe neonatal acidemia at birth.
[Retracted] Development of Health Digital GIS Map for Tuberculosis Disease Distribution Analysis in Sudan
Authors: Siddik Mohamed Sidahmed M. , Ahmed Thowiba E. , Awad Ahmed Fatima Rayan , Mokhtar Rania A. , Ali Elmustafa Sayed , Saeed Rashid A.
Published: February 2023

Health digital GIS map provides a great solution for medical geographical distribution to efficiently explore diseases and health services. In Sudan, tuberculosis disease is expanding in different areas, which requires a digital GIS map to collect information about the patients and support medical institutions by geographical distribution based on health services, drug supply, and consumption. This paper developed a health digital GIS map to provide a fair geographical distribution of tuberculosis health centers and control the drug supply according to medical reports. The proposed approach extracts the unfair distribution of medicine, as some centers receive medicine but do not receive patients, while others receive a large number of patients but limited amounts of medicine. The analysis results show that there is a defect in some states representing the distribution of tuberculosis centers. In the Northern State, there are 15 tuberculosis centers distributed over all localities, serving about 84 tuberculosis‐infected patients only.
13-cis-Retinoic Acid Affects Brain Perfusion and Function: In Vivo Study
Authors: Al-Saeedi Fatma , Rajendran Peramaiyan
Published: February 2023

Purpose. Study the effects of 13-cis-retinoic acid (13-RA), a synthetic analogue of a vitamin A used for the treatment of severe acne, on the blood flow in the rat brain using technetium-99m hexamethyl propylene amine oxime (99mTc-HMPAO) imaging. Methods. A total of 30 adult male Wistar rats were divided into the control (C), low-dose (L), and high-dose (H) groups. The L and H rats were exposed subcutaneously to 0.3 and 0.5 mg, respectively, of 13-RA per kg of body weight for seven days. Brain blood flow imaging was performed using a gamma camera. Then, a region of interest (ROI) around the brain (target, T), a whole-body region (WB), and a background region (BG) was selected and delimited. The net 99mTc-HMPAO brain counts were calculated as the net target counts, [Formula: see text] in all groups. At the end of the 99mTc-HMPAO brain blood flow imaging, the brain, heart, kidney, lung, and liver were rapidly removed, and their uptake was determined. Brain histopathological analysis was performed using hematoxylin and eosin stains. In addition, the plasma fatty acids were studied using gas chromatography/mass spectrometry. Results. There were highly significant differences between L and H in comparison to C and across the groups. The 99mTc-HMPAO radioactivity in the brain showed increased uptake in a dose-dependent manner. There were also significant changes in the brain tissues and decreased free fatty acids among the groups compared to C. Conclusion. 13-RA increases 99mTcHMPAO brain perfusion, uptake, and function and reduces fatty acids.
Experimental Study of Explosion Characteristics and General Correlations of Lean H2/CO/CH4/Air Mixtures in Quiescence
Authors: Nguyen Minh Tien , Bui Van Ga , Nguyen Xuan Bao , Nguyen Le Chau Thanh , Pham Minh Man , Truong Thi Hoa , Phung Minh Tung , Bui Van Hung
Published: February 2023

A comprehensive understanding of the combustion characteristics of complex and changeable synthesis gas (syngas) compositions is essential for the further development of syngas-fueled engines with high thermal efficiency and low emissions. This study investigated explosion duration properties and laminar burning velocity (

S

L

) of multicomponent syngas/air using the pressure-rise method. The lean multicomponent syngas/air mixtures at various equivalence ratios (

ϕ
=
0.6

, 0.7, and 0.8) containing different volumetric fractions of H2 (10–30%), CO (10–30%), and CH4 (40–60%) were conducted in a cylindrical constant volume combustion chamber using a dual-coil car ignition system. The explosion duration was characterized by the flame development time (FDT) and flame rising time (FRT), where FDT (FRT) is the time between spark ignition and 10% (10% and 90%) of the total heat release. The results showed that the values of FDT were approximately twofold of the FRT values, and they decreased with increasing H2 or CO content in the mixture. The leaner the mixture, the faster would be the reduction in the FRT and FDT as increasing H2 and/or CO content. Moreover, FDT and FRT were the shortest at a (H2/(H2+CO)) ratio of 0.5, at which the CH4 content was the lowest. Beyond this ratio, FDT and FRT increased, suggesting a significant effect of CH4 concentration. The shorter the FRT value, the higher would be the

S

L

value. The current

S

L

values, together with previous syngas data, could be well represented by a modified correlation with a slight discrepancy. This suggests a possible self-similar propagation of syngas/air laminar flames, regardless of the equivalence ratio, constituent fraction, temperature, pressure, and dilution. Additionally, a small value of mean absolute percentage error (~10.8%) revealed a better correlation for predicting

S

L

values of syngas fuels.