This is our latest selection of worldwide publications and patents in english on Astrophysics, between many scientific online journals, classified and focused on astrophysic, neutron star, supernova, black hole, cosmic microwave, CMBR, quasar, redshift, accretion disk, dark matter, cosmic inflation, magnetohydrodynamic, dark energy, Hubble, event horizon, gravitational wave, exoplanet, red giant, white dwarf and red shift.
A Generalized Shape Function for Vibration Suppression Analysis of Acoustic Black Hole Beams Based on Fractional Calculus Theory
Published on 2025-03-04 by Jun Xu, Ning Chen @MDPI
Abstract: In this paper, a generalized acoustic black hole (ABH) beam covered with a viscoelastic layer is proposed to improve the energy dissipation based on the double-parameter Mittag–Leffler (ML) function. Since fractional-order constitutive models can more accurately capture the properties of viscoelastic materials, a fractional dynamic model of an ABH structure covered with viscoelastic film is established based on the fractional Kelvin–Voigt constitutive equation and the[...]
Our summary: Generalized shape function proposed for vibration suppression in acoustic black hole beams. Fractional dynamic model established based on fractional Kelvin-Voigt constitutive equation. Particle Swarm Optimization algorithm used to optimize shape function parameters.
Fractional Calculus Theory, Vibration Suppression Analysis, Acoustic Black Hole Beams, Viscoelastic Layer
Publication
Study on the Reconstruction of the Spectral Pattern of Near-Island Reef Bimodal Waves
Published on 2025-03-03 by Weihang Sun, Yuguo Pei, Leilei Qu, Xiaobo Wang @MDPI
Abstract: Accurately fitting bimodal wave spectra is crucial for understanding complex ocean conditions and promoting ocean-related research. In this context, this paper aims to solve the problem of reconstructing bimodal wave spectra in domestic island and reef areas. Taking measured data from the Jiangsu Xiangshui station in August 2017 and the Xisha Sea area on 1–3 August 2014 as case studies, the researchers selected three types of original bimodal wave spectra. After obtaining the sampl[...]
Our summary: Study aims to reconstruct bimodal wave spectra in island and reef areas using measured data and novel wave spectrum, achieving high fitting accuracy for different types of bimodal spectra.
Reconstruction, Bimodal, Wave, Spectra
Publication
A Numerical and Experimental Analysis
Published on 2025-03-01 by Ruiqing Lang, Yongquan Han, Yonglin Ma @MDPI
Abstract: The characteristics of a variable polarity plasma arc (VPPA) and the keyhole behavior significantly influence weld formation. This study investigates the impact mechanism of welding current on weld formation by examining both arc thermal-force output and keyhole behavior through a combination of numerical analysis and experimental methods. A three-dimensional transient arc model with alternating loading of electrode negative (EN) and electrode positive (EP) polarity arcs is developed based on ma[...]
Our summary: Investigating impact mechanism of welding current on weld formation through numerical and experimental analysis of variable polarity plasma arc characteristics and keyhole behavior. Developing a transient arc model with alternating EN and EP polarity arcs based on magnetohydrodynamics and UDS. Analyzing arc characteristics, thermal force, and keyhole stability for optimal weld bead formation.
numerical analysis, experimental methods, variable polarity plasma arc, welding current
Publication
Fluorescence Quenching of Graphene Quantum Dots from Orange Peel for Methyl Orange Detection
Published on 2025-02-28 by Weitao Li, Yang Liu, Xinglong Pang, Yuanhao Huang, Zeyun Dong, Qian Niu, Yuping Xiong, Shang Li, Shuai Li, Lei Wang, Huazhang Guo, Saisai Cui, Shenpeng Hu, Yuenan Li, Tiantian Cha, Liang Wang @MDPI
Abstract: Methyl orange (MO) is an organic synthetic dye widely used in laboratory and industrial applications. In laboratory settings, it serves as an acid–base indicator due to its distinct color change in both acidic and alkaline environments. Industrially, it is primarily utilized in the textile industry for its ultraviolet (UV) absorption properties. However, the discharge and leakage of methyl orange into the environment can cause severe ecological damage and pose potential carcinogeni[...]
Our summary: Synthesis of GQDs from orange peel for MO detection, GQDs exhibit cyan and yellow fluorescence, Methyl orange quenches fluorescence of y-GQDs.
Fluorescence Quenching, Graphene Quantum Dots, Methyl Orange, Detection
Publication
Synthesis, Luminescent and Antibacterial Properties of Sol-Gel TiO2/TeO2/Nb2O5 Powders
Published on 2025-02-21 by Kalina Ivanova, Albena Bachvarova-Nedelcheva, Reni Iordanova, Angelina Stoyanova, Petia Petrova, Lilia Yordanova, Iliana Ivanova @MDPI
Abstract: The present paper deals with the synthesis, characterization, and properties of sol-gel-derived TiO2/TeO2/Nb2O5 nanopowders. The gels were prepared using a combination of organic [Ti (IV) n-butoxide, Nb (V) ethoxide (C10H25NbO5)] and inorganic [telluric acid (H6TeO6)] precursors. The aging of gels was performed in air for several days in order to enable further hydrolysis. The phase formation of the gels was investigated by XRD upon heating in the temperature range of 200–700 &[...]
Our summary: Synthesis, characterization, and properties of TiO2/TeO2/Nb2O5 nanopowders. Gels prepared using organic and inorganic precursors, aged in air, and heat-treated to form crystalline phases. UV-Vis and photoluminescence analyses, photocatalytic activity, and antibacterial properties against E. coli demonstrated. Prospective environmental catalysts.
Sol-Gel, TiO2, Luminescent, Antibacterial
Publication
Parameter Design for Inter-Satellite Laser Link Acquisition Under Weak Light Conditions
Published on 2025-02-20 by Mengyang Zhao, Jia Shen, Juan Wang, Pan Li, Ruihong Gao, Ziren Luo @MDPI
Abstract: For the Taiji program or other LISA-like space-based gravitational wave (GW) detection missions, establishing laser links is a prerequisite for entering the normal science mode. There has been a lack of in-depth research on inter-satellite link acquisition under weak light and low-speed conditions. In this paper, we comprehensively analyze the impact of key parameters, including scan speed, track width, acquisition camera integration time, and jitter, on the acquisition process. By introducing l[...]
Our summary: Analyzing key parameters for laser link acquisition under weak light conditions, deriving analytical expression for acquisition failure probability, and optimizing parameters for minimal acquisition time.
Parameter Design, Inter-Satellite Laser Link, Weak Light Conditions, Acquisition Process
Publication
A lighting control system for the entrance section of a highway tunnel to alleviate the "black hole effect"
Patent published on the 2024-11-14 in LU under Ref LU507220 by UNIV CHONGQING JIAOTONG [CN] (Yang Hongyun [cn])
Abstract: This invention belongs to the field of highway tunnel lighting technology and specifically involves a lighting control system for the entrance section of a highway tunnel to mitigate the black hole effect. It includes a data acquisition module, a control center module, and a load circuit. The data acquisition module comprises tunnel entrance visibility sensors, air temperature sensors, meteorological detection devices, and tunnel interior color temperature sensors. The visibility sensor detects [...]
Our summary: Entrance section lighting control system, field of highway tunnel lighting, data acquisition module with sensors, real-time monitoring and control center
highway tunnel lighting technology, lighting control system, data acquisition module, black hole effect
Patent
Giant swamp taro (cyrtosperma merkusii) cookies
Patent published on the 2023-05-26 in PH under Ref PH2202205136 by ROMBLON STATE UNIV [PH] (Erispe Jannette S [ph], Ipedro Raymund R [ph], Juanzo Clara Jean M [ph])
Abstract: A method of producing giant swamp taro (Cyrtosperma merkusii) cookies comprising the steps of, gathering giant swamp taro plant, cutting, washing, peeling, slicing, drying the sliced corm by sun-drying, grinding, powderizing, preparing all ingredients consisting of powdered corm, baking soda, salt, granulated sugar, brown sugar, butter, eggs, and vanilla extract, preheat the oven, lining a cookie sheet with parchment paper, sifting the powdered giant swamp taro, baking soda, salt and granulated [...]
Our summary: Method of producing giant swamp taro cookies includes gathering, cutting, washing, peeling, slicing, drying, grinding, powderizing, preparing ingredients, baking, and cooling.
giant swamp taro, cookies, method, production
Patent
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