bluuebunny/crossref_metadata_2025 huggingface dataset:
Uncertainty evaluation of data acquisition and analysis system relevant to infrared flowing medium laser
Authors: Dohare Rajeev Kumar , Mainuddin  , Verma Avinash C. , Singhal Gaurav
Published: October 2022

In flowing medium Chemical Oxygen Iodine Laser (COIL), Singlet oxygen is produced by the exothermic reaction of basic hydrogen peroxide solution and chlorine gas. It pumps the iodine and lasing process takes place by stimulated emission. Laser power is extracted using cavity. Development of customized data acquisition system is essential for measurements and analysis of both fundamental (temperature, pressure, level) as well as derived parameters (lasing medium concentration, flow rates of gases and laser power). The focus of the present paper is to dwell on uncertainty evaluation of a complex gas laser source in terms of ascertaining influences of primary/fundamental variables and corresponding derived parameters along with manner of uncertainty propagation. The study facilitates determining the variables with most significant impact on system performance, critical form point of view from optimal functioning of large-scale systems. This enables prediction of overall system uncertainty potentially extendable to other similar laser systems involving subsystems with mutual interdependencies together being distributed over a significantly large laboratory space. The relative combined uncertainty is computed to be 8.3%. The methodology shows significant potential for true decision-making and control of realistic gas laser source operation using developed 150 channel Data Acquisition and Analysis System (DAAS).
TGF-β2 levels in the aqueous humor are elevated in the second eye of high myopia within two weeks after sequential cataract surgery
Authors: Yan Weijia , Zhang Yaping , Cao Junguo , Yan Hong
Published: October 2022

Transforming growth factor-β (TGF-β) is the critical regulator of physiological and pathological conditions in lens. The TGF-β signaling pathway is closely associated with high myopia patients. Thirty eyes from fifteen patients with high myopia who received sequential cataract surgery were enrolled in this prospective study. Ten cataract patients with non-myopia were chosen as a control group. Aqueous humor (AH) samples were used to detect the levels of TGF-β1, TGF-β2, and TGF-β3 in both groups. Compared with the non-myopic cataracts patient group, the highly myopic cataracts group had a significantly higher TGF-β2 (P = 0.019). Besides, the level of TGF-β2 of the second eye was significantly higher than that in the first eye in high myopia cataract patients group (P = 0.037). And TGF-β1 showed significant differences with age and axial length of high myopia cataract patients. Therefore, TGF-β2 may contribute to the development of high myopia and cataract surgery increased the expression of TGF-β2.
Synergy of R-(–)carvone and cyclohexenone-based carbasugar precursors with antibiotics to enhance antibiotic potency and inhibit biofilm formation
Authors: Riester Oliver , Burkhardtsmaier Pia , Gurung Yuna , Laufer Stefan , Deigner Hans-Peter , Schmidt Magnus S.
Published: October 2022

The widespread use of antibiotics in recent decades has been a major factor in the emergence of antibiotic resistances. Antibiotic-resistant pathogens pose increasing challenges to healthcare systems in both developing and developed countries. To counteract this, the development of new antibiotics or adjuvants to combat existing resistance to antibiotics is crucial. Glycomimetics, for example carbasugars, offer high potential as adjuvants, as they can inhibit metabolic pathways or biofilm formation due to their similarity to natural substrates. Here, we demonstrate the synthesis of carbasugar precursors (CSPs) and their application as biofilm inhibitors for E. coli and MRSA, as well as their synergistic effect in combination with antibiotics to circumvent biofilm-induced antibiotic resistances. This results in a biofilm reduction of up to 70% for the CSP rac-7 and a reduction in bacterial viability of MRSA by approximately 45% when combined with the otherwise ineffective antibiotic mixture of penicillin and streptomycin.
Prefrontal tDCS is unable to modulate mind wandering propensity or underlying functional or effective brain connectivity
Authors: Coulborn Sean , Fernández-Espejo Davinia
Published: October 2022

There is conflicting evidence over the ability to modulate mind-wandering propensity with anodal transcranial direct current stimulation (tDCS) over the left dorsolateral prefrontal cortex (prefrontal tDCS). Here, 20 participants received 20-min of active and sham prefrontal tDCS while in the MRI scanner, in two separate sessions (counterbalanced). In each session, they completed two runs of a sustained attention to response task (before and during tDCS), which included probes recording subjective responses of mind-wandering. We assessed the effects of tDCS on behavioural responses as well as functional and effective dynamics, via dynamic functional network connectivity (dFNC) and dynamic causal modelling analyses over regions of the default mode, salience and executive control networks. Behavioural results provided substantial evidence in support of no effect of tDCS on task performance nor mind-wandering propensity. Similarly, we found no effect of tDCS on frequency (how often) or dwell time (time spent) of underlying brain states nor effective connectivity. Overall, our results suggest that prefrontal tDCS is unable to modulate mind-wandering propensity or influence underlying brain function. This expands previous behavioural replication failures in suggesting that prefrontal tDCS may not lead to even subtle (i.e., under a behavioural threshold) changes in brain activity during self-generated cognition.
The effects of point defect type, location, and density on the Schottky barrier height of Au/MoS2 heterojunction: a first-principles study
Authors: Sorkin Viacheslav , Zhou Hangbo , Yu Zhi Gen , Ang Kah-Wee , Zhang Yong-Wei
Published: October 2022

Using DFT calculations, we investigate the effects of the type, location, and density of point defects in monolayer MoS2 on electronic structures and Schottky barrier heights (SBH) of Au/MoS2 heterojunction. Three types of point defects in monolayer MoS2, that is, S monovacancy, S divacancy and MoS (Mo substitution at S site) antisite defects, are considered. The following findings are revealed: (1) The SBH for the monolayer MoS2 with these defects is universally higher than that for its defect-free counterpart. (2) S divacancy and MoS antisite defects increase the SBH to a larger extent than S monovacancy. (3) A defect located in the inner sublayer of MoS2, which is adjacent to Au substrate, increases the SBH to a larger extent than that in the outer sublayer of MoS2. (4) An increase in defect density increases the SBH. These findings indicate a large variation of SBH with the defect type, location, and concentration. We also compare our results with previously experimentally measured SBH for Au/MoS2 contact and postulate possible reasons for the large differences among existing experimental measurements and between experimental measurements and theoretical predictions. The findings and insights revealed here may provide practical guidelines for modulation and optimization of SBH in Au/MoS2 and similar heterojunctions via defect engineering.
Optimising expression of the large dynamic range FRET pair mNeonGreen and superfolder mTurquoise2ox for use in the Escherichia coli cytoplasm
Authors: Mertens Laureen M. Y. , den Blaauwen Tanneke
Published: October 2022

The fluorescent proteins superfolder mTurquoise2ox (sfTq2ox) and mNeonGreen function excellently in mammalian cells, but are not well expressed in E. coli when forming the N-terminus of constructs. Expression was increased by decreasing structures at the start of their coding sequences in the mRNA. Unfortunately, the expression of mNeonGreen started from methionine at position ten as optimisation introduced an alternative RBS in the GFP N-terminus of mNeonGreen. The original start-codon was not deleted, which caused the expression of isomers starting at the original start-codon and at the start-codon at the beginning of the GFP N-terminus. By omitting the GFP N-terminus of mNeonGreen and optimising the structure of its mRNA, the expression of a mixture of isomers was avoided, and up to ~ 50-fold higher expression rates were achieved for mNeonGreen. Both fluorescent proteins can now be expressed at readily detectable levels in E. coli and can be used for various purposes. One explored application is the detection of in-cell protein interactions by FRET. mNeonGreen and sfTq2ox form a FRET pair with a larger dynamic range than commonly used donor–acceptor pairs, allowing for an excellent signal-to-noise ratio, which supports the detection of conformational changes that affect the distance between the interacting proteins.
The ambiguous feeling between “mine” and “not-mine” measured by integrated information theory during rubber hand illusion
Authors: Niizato Takayuki , Nishiyama Yuta , Sakamoto Kotaro , Kazama Takumi , Okabayashi Tatsuya , Yamaguchi Taiki
Published: October 2022

Human body awareness is adaptive to context changes. The illusory sense of body ownership has been studied since the publication of the rubber hand illusion, where ambiguous body ownership feeling was first defined. Phenomenologically, the ambiguous body ownership is attributed to a conflict between feeling and judgement: it characterises a discrepancy between first- and third-person processes. Although Bayesian inference can explain this malleability of body image, it still fails to relate the subjective feeling to physiological data. This study attempts to explain subjective experience during rubber hand illusions by using integrated information theory (IIT). The integrated information $$\Phi$$
Φ
in IIT measures the difference between the whole system and its subsystems. By analysing seven different time-series of physiological data representing a small body–brain system, we demonstrate that the integrity of the whole system during the illusion decreases, while the integrity of its subsystems increases. These general tendencies agree with many brain-image analyses and subjective reports; furthermore, we found that subjective ratings as ambiguous body ownership were associated with $$\Phi$$
Φ
. Our result suggests that IIT can explain the general tendency of the sense of ownership illusions and individual differences in subjective experience during the illusions.
Psychological well-being during the COVID-19 pandemic in Italy assessed in a four-waves survey
Authors: de Girolamo Giovanni , Ferrari Clarissa , Candini Valentina , Buizza Chiara , Calamandrei Gemma , Caserotti Marta , Gavaruzzi Teresa , Girardi Paolo , Habersaat Katrine Bach , Lotto Lorella , Scherzer Martha , Starace Fabrizio , Tasso Alessandra , Zamparini Manuel , Zarbo Cristina
Published: October 2022

COVID-19 pandemic had a negative impact on the mental health and well-being (WB) of citizens. This cross-sectional study included 4 waves of data collection aimed at identifying profiles of individuals with different levels of WB. The study included a representative stratified sample of 10,013 respondents in Italy. The WHO 5-item well-being scale (WHO-5) was used for the assessment of WB. Different supervised machine learning approaches (multinomial logistic regression, partial least-square discriminant analysis—PLS-DA—, classification tree—CT—) were applied to identify individual characteristics with different WB scores, first in waves 1–2 and, subsequently, in waves 3 and 4. Forty-one percent of participants reported “Good WB”, 30% “Poor WB”, and 28% “Depression”. Findings carried out using multinomial logistic regression show that Resilience was the most important variable able for discriminating the WB across all waves. Through the PLS-DA, Increased Unhealthy Behaviours proved to be the more important feature in the first two waves, while Financial Situation gained most relevance in the last two. COVID-19 Perceived Risk was relevant, but less than the other variables, across all waves. Interestingly, using the CT we were able to establish a cut-off for Resilience (equal to 4.5) that discriminated good WB with a probability of 65% in wave 4. Concluding, we found that COVID-19 had negative implications for WB. Governments should support evidence-based strategies considering factors that influence WB (i.e., Resilience, Perceived Risk, Healthy Behaviours, and Financial Situation).
Sex chromosomes in the tribe Cyprichromini (Teleostei: Cichlidae) of Lake Tanganyika
Authors: Behrens Kristen A. , Koblmüller Stephan , Kocher Thomas D.
Published: October 2022

Sex determining loci have been described on at least 12 of 22 chromosomes in East African cichlid fishes, indicating a high rate of sex chromosome turnover. To better understand the rates and patterns of sex chromosome replacement, we used new methods to characterize the sex chromosomes of the cichlid tribe Cyprichromini from Lake Tanganyika. Our k-mer based methods successfully identified sex-linked polymorphisms without the need for a reference genome. We confirm the three previously reported sex chromosomes in this group. We determined the polarity of the sex chromosome turnover on LG05 in Cyprichromis as ZW to XY. We identified a new ZW locus on LG04 in Paracyprichromis brieni. The LG15 XY locus in Paracyprichromis nigripinnis was not found in other Paracyprichromis species, and the sample of Paracyprichromis sp. “tembwe” is likely to be of hybrid origin. Although highly divergent sex chromosomes are thought to develop in a stepwise manner, we show two cases (LG05-ZW and LG05-XY) in which the region of differentiation encompasses most of the chromosome, but appears to have arisen in a single step. This study expands our understanding of sex chromosome evolution in the Cyprichromini, and indicates an even higher level of sex chromosome turnover than previously thought.
Synthesis of honeycomb Ag@CuO nanoparticles and their application as a highly sensitive and electrocatalytically active hydrogen peroxide sensor material
Authors: Li Yong , Yin Pengchong , Zhang Yuxin , Zhang Ruizhu
Published: October 2022

A new type of H2O2 sensor is prepared in this paper. Novel honeycomb Ag@CuO nanoparticles were prepared by electrospinning, which were used as an electrode material to improve the contact performance between electrons more efficiently.
Rapid authentication of coffee bean varieties of different forms by using a pocket-sized spectrometer and multivariate data modelling
Authors: Boadu Vida Gyimah , Teye Ernest , Amuah Charles L. Y. , Sam-Amoah L. K.
Published: October 2022

Coffee is the most consumed beverage and the second most valuable traded commodity in the world.
Ni–Fe nanoframesviaa unique structural formation induced by sonochemical etching
Authors: Alowasheeir Azhar , Nara Hiroki , Eguchi Miharu , Yamauchi Yusuke
Published: October 2022

A Ni–Fe nanoframe exhibits unique structural merits including 3D open structure and high surface area, enhancing electrochemical properties for oxygen-evolution reaction (OER).
A zero-carbon emission chemical method to remove gaseous formaldehyde at room temperature by a renewable aminooxy-functionalized graphene composite
Authors: Pu Jiayan , Wang Lei , Fang Jinhou , Chen Tao , Li Aihua , Liu Zhen , Xia Yanzhi , Wang Xiutong , Liu Jingquan
Published: October 2022

We prepared a composite of aminooxy bifunctional molecules with graphene, which can decompose 91 mg of HCHO by 1 g of bifunctional molecules at room temperature with the only byproduct of water.
Ketone-derived 2,3-dihydroquinazolinones inN-heteroarene C–H alkylationviaC–C bond scission under oxidative metal catalysis
Authors: Mondal Pinku Prasad , Pal Amit , Prakash Athira K , Sahoo Basudev
Published: October 2022

A mild silver-catalysed oxidative C–H alkylation ofN-heteroarenes is developed, utilizing aliphatic ketone-derived 2,3-dihydroquinazolinones as an alkyl radical reservoir.
New cell-membrane-anchored near-infrared fluorescent probes for viscosity monitoring
Authors: Liu Ya , Li Xiaohua , Shi Wen , Ma Huimin
Published: October 2022

We developed new cell-membrane-anchored fluorescent probes for viscosity detection. Probe MYN-BS has been successfully applied in the monitoring of cell membrane viscosity during temperature change and cell foaming.
Catalytic O2 activation toward oxidative N–S bond formation by a thiolato Fe(iii) complex
Authors: Hsieh Chang-Chih , Li Cheng-Yao , Chiang Ming-Hsi , Horng Yih-Chern
Published: October 2022

The first anionic Fe(iii) monosulfenato (Fe–S(O)R) complex, as a possible intermediate species in the catalytic intramolecular N–S bond formation, is isolated and structurally determined.
Correction: Electric-field-induced coupling of aryl iodides with a nickel(0) complex
Authors: Orchanian Nicholas M. , Guizzo Sophia , Steigerwald Michael L. , Nuckolls Colin , Venkataraman Latha
Published: October 2022

Correction for ‘Electric-field-induced coupling of aryl iodides with a nickel(0) complex’ by Nicholas M. Orchanian et al., Chem. Commun., 2022, https://doi.org/10.1039/d2cc03671a.
Co-agglomerated crystals of cyclic nitramines with sterically crowded molecules
Authors: Patil Veerabhadragouda B. , Yan Qi-Long , Trzciński Waldemar A. , Bělina Petr , Shánělová Jana , Musil Tomáš , Zeman Svatopluk
Published: October 2022

Co-crystallization of cyclic nitramines with sterically crowded molecules, i.e., ε-2,4,6,8,10,12-hexanitro-2,4,6,8,10,12-hexaazaisowurtzitane (ε-CL-20) with cis-1,3,4,6-tetranitrooctahydroimidazo-[4,5-d]imidazole, is difficult, but co-agglomeration given good results.
A polarizable coarse-grained model for metal, metal oxide and composite metal/metal oxide nanoparticles: development and implementation
Authors: Rinkevicius Zilvinas , Kaminskas Marius , Palevičius Paulius , Ragulskis Minvydas , Bočkutė Kristina , Sriubas Mantas , Laukaitis Giedrius
Published: October 2022

We present a polarizable coarse-grained model for metal, metal oxide, and composite metal/metal oxide nanoparticles with well-defined crystalline surfaces.
A polarizable coarse-grained model for metal, metal oxide and composite metal/metal oxide nanoparticles and its applications
Authors: Rinkevicius Zilvinas , Kaminskas Marius , Palevičius Paulius , Ragulskis Minvydas , Bočkutė Kristina , Sriubas Mantas , Laukaitis Giedrius
Published: October 2022

We present a selected set of exemplifying applications of the novel polarizable coarse-grained model to various outstanding problems in the physics and chemistry of nanoparticles.
Theoretical investigation of selective CO2 capture and desorption controlled by an electric field
Authors: Saegusa Koki , Chishima Kenshin , Sampei Hiroshi , Ito Kazuharu , Murakami Kota , Seo Jeong Gil , Sekine Yasushi
Published: October 2022

Carbon dioxide adsorption by applying an electric field to solid oxides that can be driven on demand was investigated.
Optoelectronic tweezers: a versatile toolbox for nano-/micro-manipulation
Authors: Zhang Shuailong , Xu Bingrui , Elsayed Mohamed , Nan Fan , Liang Wenfeng , Valley Justin K. , Liu Lianqing , Huang Qiang , Wu Ming C. , Wheeler Aaron R.
Published: October 2022

This review covers the fundamentals, recent progress and state-of-the-art applications of optoelectronic tweezers technology, and demonstrates that optoelectronic tweezers technology is a versatile and powerful toolbox for nano-/micro-manipulation.
Europium-151 and iron-57 nuclear resonant vibrational spectroscopy of naturally abundant KEu(iii)Fe(ii)(CN)6 and Eu(iii)Fe(iii)(CN)6 complexes
Authors: Wang Hongxin , Huang Songping D. , Yan Lifen , Hu Michael Y. , Zhao Jiyong , Alp Ercan E. , Yoda Yoshitaka , Petersen Courtney M. , Thompson Matthew K.
Published: October 2022

We have performed and analyzed the first combined 151Eu and 57Fe nuclear resonant vibrational spectroscopy (NRVS) for naturally abundant KEu(iii)[Fe(ii)(CN)6] or Eu(iii)[Fe(iii)(CN)6] complex.
Achieving a tunable and ultra-broadband near-infrared emission in the Ga2−2xZnxGexO3:Cr3+ phosphor
Authors: Zeng Liwei , Zhong Jiyou , Lin Wenbin , Zhao Weiren
Published: October 2022

A series of tunable and ultra-broadband NIR phosphor Ga2−2xZnxGexO3:Cr3+ was successfully achieved by [Zn2+–Ge4+] unit co-substituting [Ga3+–Ga3+] unit in Ga2O3:Cr3+.
Alloying nickel and cobalt with iron on ZSM-5 for tuning competitive hydrogenation reactions for selective one-pot conversion of furfural to gamma-valerolactone
Authors: Shao Yuewen , Guo Mingzhu , Fan Mengjiao , Sun Kai , Gao Guoming , Li Chao , Bkangmo Kontchouo Félix Mérimé , Zhang Lijun , Zhang Shu , Hu Xun
Published: October 2022

One-pot conversion of furfural to gamma-valerolactone in ethanol was achieved over a bifunctional Ni–Co–Fe/ZSM-5 catalyst with alloy sites and acidic sites.
Ligand-induced synthesis of two Cu-based coordination polymers and derivation of carbon-coated metal oxide heterojunctions for enhanced photocatalytic degradation
Authors: Zhang Xiao-Sa , Zhao Hong-Tian , Liu Yu , Li Wen-Ze , Luo Nan , Luan Jian
Published: October 2022

In this study two new Cu-CPs have been constructed as precursors for the preparation of carbon-coated metal oxide heterojunctions. Moreover, we have used Mo metal as a doping agent to boost the photodegradation activity of the CP-derived carbon nanostructures.
In situ electrochemical transformation of Ni2+ to NiOOH as an effective electrode for water oxidation reaction
Authors: Kumaravel Sangeetha , Jayakumar Rishivandhiga , Saravanan Karthik Kumaran , Niharika Vennala , Eunice Evangeline Bariki , Singaram Vengatesan , Kundu Subrata
Published: October 2022

Simple in situ formation of NiOOH over a GDL surface was studied for alkaline OER. Layered structure of NiOOH@GDL showed a low overpotential of 294 mV to reach 20 mA cm−2 with less resistance and ensures the high stability of 30 h in chronoamperometric studies.
Stretchable separator/current collector composite for superior battery safety
Authors: Liu Zhikang , Dong Yanhao , Qi Xiaoqun , Wang Ru , Zhu Zhenglu , Yan Chao , Jiao Xinpeng , Li Sipei , Qie Long , Li Ju , Huang Yunhui
Published: October 2022

A highly deformable separator/current collector composite is designed for Li-ion batteries to mitigate mechanical abuse-induced short-circuiting.
An alloy small molecule acceptor for green printing organic solar cells overcoming the scaling lag of efficiency
Authors: Wan Ji , Wu Yao , Sun Rui , Qiao Jiawei , Hao Xiaotao , Min Jie
Published: October 2022

The BTP-F3Cl-based ternary system can overcome the scaling lag of device efficiency more effectively than the PM1:L8-BO host system, which can guide the lab-to-manufacturing translation of green printing organic solar cells.
Lignin alkaline oxidation using reversibly-soluble bases
Authors: Kruger Jacob S. , Dreiling Reagan J. , Wilcox Daniel G. , Ringsby Arik J. , Noon Katherine L. , Amador Camille K. , Brandner David G. , Ramirez Kelsey J. , Haugen Stefan J. , Klein Bruno C. , Davis Ryan , Hanes Rebecca J. , Happs Renee M. , Cleveland Nicholas S. , Christensen Earl D. , Miscall Joel , Beckham Gregg T.
Published: October 2022

When excess base is required to drive desired reactions, such as in lignin alkaline oxidation, Sr(OH)2 can offer a reversibly-soluble alternative to NaOH that allows simple recycle of the excess base with concomitant cost and environmental benefits.
Direct multi-elemental analysis of whole blood samples by LA-ICP-MS employing a cryogenic ablation cell
Authors: Li Fan , Lei Xiaoqing , Li Huilai , Cui Hua , Guo Wei , Jin Lanlan , Hu Shenghong
Published: October 2022

The whole blood samples were analyzed by LA-ICP-MS with cryogenic ablation cell, which avoid droplet splashing during the laser ablation process and improve analytical precision significantly.
Characterization of interactions of montelukast sodium with human serum albumin: multi-spectroscopic techniques and computer simulation studies
Authors: Zheng Shoujun , Fang Xinyi , Li Fan , Sun Qiaomei , Zhao Mu , Wei Huiping , Xu Wanyu , Li Hui
Published: October 2022

The interaction mechanism of montelukast sodium and HSA was characterized using spectroscopic and computer methods.
Incorporation of Ti3+ metal ions in chemically spray deposited CdO thin films for optoelectronic and chem-resistive based formaldehyde gas sensor applications
Authors: Velusamy P. , Ramesh Babu R. , Sathiya M. , Ahmad Awais , Alothman Asma A. , Sheikh Saleh Mushab Mohammed , Elamurugu Elangovan , Senthil Pandian M. , Ramasamy P.
Published: October 2022

Optoelectronic and gas sensing properties of Ti-doped CdO thin films spray deposited at 300 °C on glass substrates were studied.
Synthesis and functionalization of casein nanoparticles with aptamers for triple-negative breast cancer targeting
Authors: Spanu Chiara , Camorani Simona , Tortorella Silvia , Agnello Lisa , Maturi Mirko , Comes Franchini Mauro , Cerchia Laura , Locatelli Erica
Published: October 2022

This work shows the synthesis of a drug delivery system made of casein nanoparticles able to host hydrophobic molecules and be functionalized with aptamers targeting the epidermal growth factor receptor.
Dual-sensitive GO-based self-assembly for the delivery of a hydrophobic anti-cancer drug
Authors: Ma Jiaqi , Liu Yehong , Chen Miaoxin , Li Mengli , Xu Shouhong , Liu Honglai
Published: October 2022

A novel pH and GSH stimuli-responsive GO-based self-assembly for precise and controlled drug release.
Multifunctional Na-enriched Ni–Fe/Ni–P plates for highly efficient photo- and electrocatalytic water splitting reactions
Authors: Anantha Krishnan A. , M. A Aneesh Kumar , Nair Revathy B. , R Sivaraj , A Lamiya , Jishnu P. K. , Kurian Sajith , Mathew Thomas , Ameen Sha M. , Arun P. S.
Published: October 2022

In this work, we first report a novel sodium-enriched Ni–Fe mixed-oxide catalyst incorporated into a Ni–P electrode for photo- and electrocatalytic water splitting.
One-step preparation of binder-free WO3 CNFs/GO self-supported electrodes
Authors: Yu Yongbo , Wang Qing , Dai Jianfeng , Shi Xiangyu , Wang Can
Published: October 2022

The disordered arrangement of WCF and the adhesion of GO provide higher porosity.
Status review of nickel phosphides for hybrid supercapacitors
Authors: Patil Satyajeet S. , Patil Pramod S.
Published: October 2022

Transition metal phosphides are a new class of materials that have attracted enormous attention as a potential electrode for supercapacitors (SCs).
Stable d-xylose ditriflate in divergent syntheses of dihydroxy prolines, pyrrolidines, tetrahydrofuran-2-carboxylic acids, and cyclic β-amino acids
Authors: Balo Rosalino , Fernández Alberto G. , Chopdat Adam , Ayadi Soufian El , Kato Atsushi , Estévez Ramón J. , Fleet George W. J. , Estévez Juan C.
Published: October 2022

d-Xylo-2,5-ditriflate gave a wide range of highly functionalized targets, including hydroxylated prolines, pyrrolidines, furanoic acids, and cyclopentane based β2,2-amino acids.
A mechanistic study of thiol addition to N-phenylacrylamide
Authors: Watt Sarah K. I. , Charlebois Janique G. , Rowley Christopher N. , Keillor Jeffrey W.
Published: October 2022

Experimental data from a Brønsted-type plot, a solvent kinetic isotope effect, a pH-rate plot and temperature studies are all consistent with rate-limiting nucleophilic attack of thiolate followed by rapid protonation of the enolate adduct.
Rh-catalyzed asymmetric hydrogenation of α- and β-enamido phosphonates: highly enantioselective access to amino phosphonic acids
Authors: Du Hong-Quan
Published: October 2022

Broad substrate scope; high isloated yield and enantioselectivity; novel hybrid bisphosphine ligands; gram-scale reaction with lower catalyst usage.
Recent advances in the synthesis of cyclic compounds using α,α-dicyanoolefins as versatile vinylogous nucleophiles
Authors: Farajpour Behnaz , Alizadeh Abdolali
Published: October 2022

This article provides a review of the applications of α,α-dicyanoolefins as versatile vinylogous nucleophiles in the synthesis of various cyclic compounds, covering the literature from the past 13 years.
Chemical synthesis of a library of natural product-like derivatives based on pinnaic acid and initial evaluation of their anti-cancer activity
Authors: Fudger Alex , Cakir Okan M. , Khan Yousaf , Sinclair Alex , Le Gresley Adam
Published: October 2022

A library of halichlorine/pinnaic acid novel analogues were synthesised and tested for anti-cancer activity against two cancer cell lines, HeLa and CaCo-2. Twelve compounds displayed anti-cancer activity, with eleven selective for CaCo-2 cells.
Semi-quantitative analysis of nickel: counting-based μPADs built via hand drawing and yellow oily double-sided adhesive tape
Authors: Wang Jian , Yang Tong , Li Zhengjia , Zhou Kecen , Xiao Bo , Yu Peng
Published: October 2022

Counting-based μPADs were fabricated by hand drawing and yellow oily double-sided adhesive tape, and then successfully applied for the semi-quantitative analysis of nickel.
Microencapsulation ofCitrus aurantifoliaessential oil with the optimized CaCl2crosslinker and its antibacterial study for cosmetic textiles
Authors: Pratiwi Luthfia , Eddy Diana Rakhmawaty , Al Anshori Jamaludin , Harja Asep , Wahyudi Tatang , Mulyawan Agus Surya , Julaeha Euis
Published: October 2022

A functional fabric immobilized by the microcapsules ofC. aurantifolialime essential oil (LO) was prepared and characterized.
Recent advances in the electrochemical reactions of nitrogen-containing organic compounds
Authors: Kaboudin Babak , Behroozi Milad , Sadighi Sepideh
Published: October 2022

The electrochemical reaction of amines, nitriles, amides, nitroaromatics, and imines has been proven to be a valuable method for the synthesis of various nitrogen-containing organic compounds.
Efficient leaching process of rare earth, alkali and alkaline earth metals from phosphogypsum based on methanesulfonic acid (MSA) as green & eco-friendly lixiviant
Authors: Ait Brahim Jamal , Merroune Amal , Boulif Rachid , Mounir El Mahdi , Beniazza Redouane
Published: October 2022

Development of green and eco-friendly leaching process of rare earth elements from phosphogypsum using methanesulfonic acid (MSA). A kinetics investigation was carried out to describe the leaching mechanisms of REEs.
Bayesian optimisation with transfer learning for NASICON-type solid electrolytes for all-solid-state Li-metal batteries
Authors: Fukuda Hiroko , Kusakawa Shunya , Nakano Koki , Tanibata Naoto , Takeda Hayami , Nakayama Masanobu , Karasuyama Masayuki , Takeuchi Ichiro , Natori Takaaki , Ono Yasuharu
Published: October 2022

Demonstrate BO approaches to search for optimal composition with high ionic conductivity efficiently.
Novel synthesis of fibronectin derived photoluminescent carbon dots for bioimaging applications
Authors: Strickland Sara , Jorns Mychele , Heyd Lindsey , Pappas Dimitri
Published: October 2022

Fibronectin (FN) derived from human plasma has been used for the first time as the carbon precursor in the top-down, microwave-assisted hydrothermal synthesis of nitrogen doped carbon dots (CDs).
Ionic supramolecular polymerization of water-soluble porphyrins: balancing ionic attraction and steric repulsion to govern stacking
Authors: Kanzaki Chisako , Yoneda Hiroshi , Nomura Shota , Maeda Takato , Numata Munenori
Published: October 2022

Anionic water-soluble porphyrins undergo supramolecular polymerization through two independent pathways—slipped stacking mediated by ionic interactions and face-to-face stacking with the assistance of hydrogen bonding of amide NH units.
Tailoring the phosphorus release from biochar-based fertilizers: role of magnesium or calcium addition during co-pyrolysis
Authors: Jetsrisuparb Kaewta , Jeejaila Thanawan , Saengthip Chanon , Kasemsiri Pornnapa , Ngernyen Yuvarat , Chindaprasirt Prinya , Knijnenburg Jesper T. N.
Published: October 2022

The addition of MgO in the co-pyrolysis of sugarcane filter cake with H3PO4 resulted in a biochar-based fertilizer with gradual P release over time. In contrast, the P release from the biochar modified with CaO and H3PO4 was poor.
Attention mechanism‐based model for short‐term bus traffic passenger volume prediction
Authors: Mei Zhenyu , Yu Wanting , Tang Wei , Yu Jiahao , Cai Zhengyi
Published: October 2022

To explore the relevance between bus stops and make the real‐time prediction of bus passenger flow more accurate, this paper proposes a Traffic Forecast Model based on the Attention mechanism (TFMA). The model combines data preprocessing with bus stops’ information coding to predict short‐term bus passenger flow based on the real‐time relevance of the bus stops. First of all, the paper conducts a statistical analysis of the actual public transportation card data of Suzhou, China, and obtains the characteristics of real‐time relevance of different bus stops. Secondly, bus route and bus stop information, the passenger flow rate of change, weather, date, and other related factors are integrated into the coding information of the bus stops. Then the method relies on the Attention mechanism to calculate the real‐time relevance of the bus stops parallelly; the core algorithm also uses a multi‐headed mechanism to increase the connection of the channel and the residual error, further improving the prediction ability. Finally, this article uses actual data from Suzhou's public transport for verification. The results show that: In terms of accuracy, TFMA outperforms multiple linear regression, GRU, and LightGBM, reaching a very high accuracy of nearly 90%.
The influence analysis of antenna radiation pattern aberration of airborne radar on clutter feature
Authors: Ye Haijun , Kuang Yunlian , Shen Yuewei , Qin Guojie
Published: October 2022

In order to quantitatively evaluate the influence of the aberration of the antenna radiation pattern of airborne radar on clutter feature, the range‐azimuth two dimensional (2D) model of the airborne radar clutter is established. Then the theoretic modelling and simulation analysis are proposed in three aspects, including the Doppler, power spectrum and space‐time 2D characteristics of the clutter. Finally, the processing of moving target indication, pulse Doppler and space‐time adaptive processing are used to suppress the clutter of the echo signals before and after the aberration. The results of the simulations indicate the aberration would elevate the sidelobe level, extend the power spectrum and bend the space‐time trajectory of the clutter Doppler spectra. And the residual clutter would be elevated nearly 5 dB after STAP processing. Then the pattern preserving and fast time cancel combined space‐time adaptive processing method is proposed, which can obtain narrow clutter notch and large improvement factor, and effectively suppress clutter. The modelling and quantitative analysis study have important theoretical and engineering significance for the detection capability of the airborne radar installed on the fuselage of the aircraft platform, the tactical and technical performance index, and improving the signal processing ability of airborne radar.
Guest editorial: intelligent ubiquitous computing and advanced learning systems for biomedical engineering
Authors: Chakraborty Chinmay , Khosravi Mohammad , Garg Lalit , Kaiser M. Shamim , Li Xingwang , Song Houbing
Published: October 2022

This special issue editorial introduces the latest development in emerging technologies of biomedical engineering, including big medical data, artificial intelligence, cloud/fog computing, federated learning, ubiquitous computing and communication, internet of things, wireless technologies, and security and privacy. In this special issue, nine manuscripts are published related to advanced learning and computing systems for biomedical engineering.
Transmission spectroscopy of WASP-7 b with UVES
Authors: Rahmati Hossein , Czesla Stefan , Khalafinejad Sara , Mollière Paul
Published: October 2022

Context. Transmission spectroscopy is a prime technique to study the chemical composition and structure of exoplanetary atmospheres. Strong excess absorption signals have been detected in the optical Na i D1, 2 Fraunhofer lines during transits of hot Jupiters, which are attributed to the planetary atmospheres and allow us to constrain their structure.

Aims. We study the atmosphere of WASP-7 b by means of high-resolution transit spectroscopy in the sodium lines.

Methods. We analyzed a spectral transit time series of 89 high-resolution spectra of the hot Jupiter WASP-7 b that was observed using the Ultraviolet and Visual Echelle Spectrograph (UVES). We used the telluric lines for an accurate alignment of the spectra and carried out a telluric correction with molecfit. Stellar magnetic activity was monitored by investigating chromospheric lines such as the Ca ii H and K, and hydrogen Hα lines. Finally, we obtained transmission spectra and light curves for various lines.

Results. The star shows no identifiable flares and, if any, marginal changes in activity during our observing run. The sodium transmission spectra and corresponding light curves clearly show signs of the Rossiter-McLaughlin effect and the stellar center-to-limb variation that we modeled using synthetic spectra. A statistically significant, narrow absorption feature with a line contrast of 0.50 ± 0.06% (at ~8.3σ level) and a full width at half maximum of 0.13 ± 0.02 Å is detected at the location of the Na i D2 line. For the Na i D1 line signal, we derived a line contrast of 0.13 ± 0.04% (at ~3.2σ level), which we consider a tentative detection. In addition, we provide upper limits for absorption by the hydrogen Balmer lines (Hα, Hβ, and Hγ), K i λ7699 Å, Ca ii H and K, and infra-red triplet lines.
KIC 7955301: A hierarchical triple system with eclipse timing variations and an oscillating red giant
Authors: Gaulme Patrick , Borkovits Tamás , Appourchaux Thierry , Pavlovski Krešimir , Spada Federico , Gehan Charlotte , Ong Joel , Miglio Andrea , Tkachenko Andrew , Mosser Benoît , Vrard Mathieu , Benbakoura Mansour , Drew Chojnowski Stephen , Perkins Jean , Hedlund Anne , Jackiewicz Jason
Published: October 2022

KIC 7955301 is a hierarchical triple system with clear eclipse timing and depth variations that was discovered by the Kepler satellite during its original mission. It is composed of a non-eclipsing primary star at the bottom of the red giant branch (RGB) on a 209-day orbit with a K/G-type main-sequence (MS) inner eclipsing binary (EB), orbiting in 15.3 days. This system was noted for the large amplitude of its eclipse timing variations (ETVs, over 4 h), and the detection of clear solar-like oscillations of the red-giant (RG) component, including p-modes of degree up to l = 3 and mixed l = 1 modes. The system is a single-lined spectroscopic triple, meaning that only spectral lines from the RG are detected. We performed a dynamical model by combining the 4-year-long Kepler photometric data, ETVs, and radial-velocity data obtained with the high-resolution spectrometers ARCES, of the 3.5 m ARC telescope at Apache Point observatory, and SOPHIE, of the 1.93 m telescope at Haute-Provence Observatory. The “dynamical” mass of the RG component was determined with a 2% precision at 1.30−0.02+0.03 M⊙. We performed asteroseismic modeling based on the global seismic parameters and on the individual frequencies. Both methods provide an estimate of the mass of the RG that matches the dynamical mass within the uncertainties. Asteroseismology also revealed the rotation rate of the core (≈15 days), the envelope (∼150 days), and the inclination (∼75°) of the RG. Three different approaches led to an estimation of the age between 3.3 and 5.8 Gyr, which highlights the difficulty of determining stellar ages despite the exceptional wealth of information available for this system. On short timescales, the inner binary exhibits eclipses with varying depths during a 7.3-year long interval, and no eclipses during the consecutive 11.9 years. This is why Kepler could detect its eclipses but TESS cannot, and the future ESA PLATO mission should detect these. In the long term, the system appears to be stable and owes its evolution to the evolution of its individual components. This triple system could end its current smooth evolution by merging by the end of the RGB of the primary star because the periastron distance is ≈142 R⊙, which is close to the expected radius of the RG at the tip of the RGB.
Modeling the effects of clumpy winds in the high-energy light curves of γ-ray binaries
Authors: Kefala E. , Bosch-Ramon V.
Published: October 2022

Context. High-mass gamma-ray binaries are powerful nonthermal galactic sources, some of them hosting a pulsar whose relativistic wind interacts with a likely inhomogeneous stellar wind. So far, modeling these sources including stellar wind inhomogeneities has been done using either simple analytical approaches or heavy numerical simulations, none of which allow for an exploration of the parameter space that is both reasonably realistic and general.

Aims. Applying different semi-analytical tools together, we study the dynamics and high-energy radiation of a pulsar wind colliding with a stellar wind with different degrees of inhomogeneity to assess the related observable effects.

Methods. We computed the arrival of clumps to the pulsar wind-stellar wind interaction structure using a Monte Carlo method and a phenomenological clumpy-wind model. The dynamics of the clumps that reach deep into the pulsar wind zone was computed using a semi-analytical approach. This approach allows for the characterization of the evolution of the shocked pulsar wind region in times much shorter than the orbital period. With this three-dimensional information about the emitter, we applied analytical adiabatic and radiative models to compute the variable high-energy emission produced on binary scales.

Results. An inhomogeneous stellar wind induces stochastic hour-timescale variations in the geometry of the two-wind interaction structure on binary scales. Depending on the degree of stellar wind inhomogeneity, 10–100% level hour-scale variability in the X-rays and gamma rays is predicted, with the largest variations occurring roughly once per orbit.

Conclusions. Our results, based on a comprehensive approach, show that present X-ray and future very-high-energy instrumentation can allow us to trace the impact of a clumpy stellar wind on the shocked pulsar wind emission in a gamma-ray binary.
TESS search for substellar companions through pulsation timing of δ Scuti stars
Authors: Vaulato V. , Nascimbeni V. , Piotto G.
Published: October 2022

Early-type main-sequence pulsating stars such as δ Scuti variables are one of the least explored class of targets in the search for exoplanets. Pulsation timing (PT) is an alternative technique to the most effective search methods. It exploits the light-travel-time effect (LTTE) to infer the presence of additional massive bodies around a pulsating star by measuring a periodic phase modulation of its signal. PT has been extremely successful in discovering and characterizing stellar binaries when it was applied to high-precision light curves over long temporal baselines, such as those delivered by the Kepler mission. In favorable conditions, the sensitivity of PT can reach the planetary-mass regime; one such candidate has already been claimed. The advent of TESS, with its nearly full-sky coverage and the availability of full-frame images, opens a great opportunity to expand this field of research. In this work, we present a pilot study aimed to understand the potential of PT as applied to TESS data, which are considerably different from Kepler data in terms of photometric noise, sampling cadence, and temporal baseline. We focused on the most favorable class of δ Scuti, that is, those showing strong pulsations and very simple frequency spectra. After the development of a customized pipeline, we were able to detect candidate companions for two targets in the (sub-)stellar mass regime: Chang 134 (43 ± 5 Mjup, P ≃ 82 days) and V393 Car (≳100 Mjup, P ≳ 700 days). Our results also highlight the limiting factors of this technique and the importance of an accurate absolute time calibration for future missions such as PLATO.
Deep low-frequency radio observations of Abell 2256
Authors: Rajpurohit K. , Osinga E. , Brienza M. , Botteon A. , Brunetti G. , Forman W. R. , Riseley C. J. , Vazza F. , Bonafede A. , van Weeren R. J. , Brüggen M. , Rajpurohit S. , Drabent A. , Dallacasa D. , Rossetti M. , Rajpurohit A. S. , Hoeft M. , Bonnassieux E. , Cassano R. , Miley G. K.
Published: October 2022

We present the first detailed analysis of the radio halo in the merging galaxy cluster Abell 2256 using the LOw Frequency ARray, the upgraded Giant Metrewave Radio Telescope, and the Karl G. Jansky Very Large Array. Radio observations (120 MHz–2 GHz) combined with archival Chandra and XMM-Newton X-ray data allowed us to study the central radio halo emission with unprecedented detail. The integrated radio emission from the entire halo is characterized by an ultra-steep spectrum, which can be described by a power law with α144 MHz1.5 GHz = −1.63 ± 0.03 and radial steepening in the outer regions. The halo is significantly underluminous according to the current scaling relations between radio power and mass at 1.4 GHz, not at 150 MHz; ultra-steep spectrum halos are predicted to be statistically underluminous. Despite the complex structure of this system, the halo morphology is remarkably similar to that of the X-ray emission. The radio surface brightness distribution across the halo is strongly correlated with the X-ray brightness of the intracluster medium. The derived correlations show sublinear slopes and distinct structures: the core is IR ∝ IX1.51, the outermost region IR ∝ IX0.41, and we find radio morphological connections with X-ray discontinuities. We also find a strong anticorrelation between the radio spectral index and the X-ray surface brightness, implying radial steepening. We suggest that the halo core is either related to old plasma from previous active galactic nuclei activity, being advected, compressed, and reaccelerated by mechanisms activated by the cold front or less turbulent with strong magnetic field in the core. The change in the radio versus X-ray correlation slopes in the outer regions of the halo could be due to a radial decline of the magnetic field, the increase in the number density of seed particles, or increasing turbulence. Our findings suggest that the emitting volume is not homogenous according to turbulent reacceleration models.
An hybrid finite element method for a quasi-variational inequality modeling a semiconductor
Authors: Nachaoui Abdeljalil , Nachaoui Mourad
Published: October 2022

A problem of determining the characteristics of a semiconductor can be reduced to the study of the quasi-variational inequality, (J. Abouchabaka, R. Aboulaïch, A. Nachaoui and A. Souissi, COMPEL 18 (1999) 143–164.) where the obstacle M(u) is the solution of an elliptic problem depending on u. We present here an hybrid finite element method for the computation of obstacle M(u) and we discuss some numerical aspects appearing in its approximation.
Auditory Evoked Potentials in Communication Disorders: An Overview of Past, Present, and Future
Authors: Maggu Akshay R.
Published: October 2022

This article provides a brief overview of auditory evoked potentials (AEPs) and their application in the areas of research and clinics within the field of communication disorders. The article begins with providing a historical perspective within the context of the key scientific developments that led to the emergence of numerous types of AEPs. Furthermore, the article discusses the different AEP techniques in the light of their feasibility in clinics. As AEPs, because of their versatility, find their use across disciplines, this article also discusses some of the research questions that are currently being addressed using AEP techniques in the field of communication disorders and beyond. At the end, this article summarizes the shortcomings of the existing AEP techniques and provides a general perspective toward the future directions. The article is aimed at a broad readership including (but not limited to) students, clinicians, and researchers. Overall, this article may act as a brief primer for the new AEP users, and as an overview of the progress in the field of AEPs along with future directions, for those who already use AEPs on a routine basis.