Article
Computer Science, Interdisciplinary Applications
Sohail Nadeem, Bushra Ishtiaq, Nevzat Akkurt, Sayed M. Eldin
Summary: The study focuses on examining the unsteady swirling flow of a non-Newtonian Eyring-Powell fluid between two rotating coaxial disks. The three-dimensional axisymmetric flow pattern and heat transfer mechanism are observed considering the effects of a magnetic field and variable thermal conductivity of the fluid. The obtained results show that the fluid parameter and variable thermal conductivity parameter have significant influence on the flow system and heat transfer rate.
JOURNAL OF COMPUTATIONAL DESIGN AND ENGINEERING
(2023)
Article
Chemistry, Multidisciplinary
Athira Kuppadakkath, Angela Barreda, Lilit Ghazaryan, Tobias Bucher, Kirill Koshelev, Thomas Pertsch, Adriana Szeghalmi, Duk Choi, Isabelle Staude, Falk Eilenberger
Summary: The resonance wavelength of metasurfaces can be tailored by applying heat, reducing the precision required for manufacturing. In our experiment with an a-Si:H metasurface, quasi-bound states in the continuum (quasi-BIC) resonance wavelength were permanently adjusted with gradual heating. The spectral shift observed was a result of refractive index variations in the material rather than geometric effects or phase transitions.
Article
Chemistry, Physical
M. Zubair Akbar Qureshi, S. Bilal, M. Bilal Ameen, Tahir Mushtaq, M. Y. Malik
Summary: The study focuses on optimizing entropy generation by using hybrid magnetized nanoparticles between two coaxially rotated porous disks. Numerical analysis and graph plotting show that increasing the volume fraction of hybrid nanoparticles can reduce entropy generation, while the Bejan number has an inverse relationship with entropy generation.
SURFACES AND INTERFACES
(2021)
Article
Engineering, Environmental
Rezvan Hosseini Rad, Volker Brueser, Milko Schiorlin, Jan Schaefer, Ronny Brandenburg
Summary: CO2 splitting in a dielectric barrier discharge (DBD) is investigated using both empty and packed bed reactors with and without cerium oxide catalyst. The DBDs are operated at pressures up to 2 bar, with the addition of argon to reduce breakdown voltage. The electrical characteristics of the discharge are studied, along with the CO2 dissociation. Increasing pressure requires a higher minimum sustaining voltage amplitude, but the optimum power input depends on pressure and gas composition. Adding ceria-coated glass spheres improves reactor performance.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Optics
Jin Leng, Jun Peng, An Jin, Duo Cao, Dejun Liu, Xiaoyong He, Fangting Lin, Feng Liu
Summary: The study found that changes in asymmetry significantly impact the Q factor and depth of amplitude modulation of Fano resonance, the carrier concentration of silicon plays a significant role in the intensity of excited Fano resonance, and a uniform graphene layer can effectively modulate Fano resonance.
OPTICS AND LASER TECHNOLOGY
(2022)
Article
Engineering, Electrical & Electronic
Kai-Ran Xiang, Fu-Chang Chen, Qing-Xin Chu
Summary: This article presents a method for designing a tunable coaxial filtering antenna. The antenna has a simple structure with a standard waveguide and metal cylinders, and the center frequency and bandwidth can be conveniently adjusted by changing the lengths of the cylinders. The paper provides detailed theoretical analysis and design process, and a third-order tunable filtering antenna with Chebyshev response is designed to verify the method. The antenna demonstrates a tunable range of 9.25 to 10.75 GHz for the center frequency and 2% to 8% for the fractional bandwidth, with flat gain greater than 6.5 dBi and good impedance and radiation characteristics throughout the tuning range.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2022)
Article
Mathematics
Qadeer Raza, M. Zubair Akbar Qureshi, Bagh Ali, Ahmed Kadhim Hussein, Behzad Ali Khan, Nehad Ali Shah, Wajaree Weera
Summary: This article investigates the novel features of morphological effects for hybrid nanofluid flow in expanding/contracting geometries. The incorporation of nanoparticles, such as metallic copper and aluminum oxide, provides extraordinary thermal conductivity and electrical insulating properties, respectively. By solving a system of nonlinear ordinary differential equations, the study discusses the influence of embedding flow factors on concentration, velocity, and temperature. The research contributes to the field of biomedical equipment and the development of nanotechnology-oriented computers.
Article
Physics, Multidisciplinary
Yin Li, Shi-Yan Zhou, Sai-Wai Wong, Jing-Yu Lin
Summary: The article introduces a dielectric rod waveguide with low transmission loss in microwave frequency, using a transition section with metal-coated dielectric cavity and dielectric horn for impedance matching. Experimental verification shows effective conversion between coaxial cable and dielectric rod waveguide using TL calibration method.
FRONTIERS IN PHYSICS
(2021)
Article
Microbiology
Maoxi Huang, Yunlong Yan, Li Wang, Jun Chen, Tao Liu, Xin Xie, Xiangyang Li
Summary: The study showed that Q-R significantly increased the expression levels of HrBP1 and PR-1a genes at the transcriptional level in TMV-infected tobacco plants, and promoted the assembly of HrBP1 into oligomers through binding in tobacco plants.
FRONTIERS IN MICROBIOLOGY
(2021)
Article
Engineering, Chemical
J. M. Lopez-Herrera, M. A. Herrada, M. Gamero-Castano, A. M. Ganan-Calvo
Summary: This study investigates the effects of various parameters on the coaxial electrospray configuration, including the thickness, relative position, and end sharpness of the coaxial feeding tubes, as well as the voltage applied. The results show how these parameters affect the size and shape of the liquid menisci, liquid streamlines, jet and core, and electric current.
JOURNAL OF AEROSOL SCIENCE
(2023)
Article
Physics, Multidisciplinary
A. Sedky, Naser Afify, A. Hakamy, Alaa M. Abd-Elnaiem
Summary: The structural and optical properties, as well as dielectric characteristics, of hydrothermally synthesized SnO2 nanoparticles, Cu/SnO2, and Fe/SnO2 composites were investigated. The results showed that the composition, temperature, and frequency have a significant impact on the electrical and optical properties of these materials. The synthesized composites exhibit potential applications in water purification, catalysis, batteries, and solar cells.
Article
Plant Sciences
Yi Xu, Juhua Liu, Caihong Jia, Wei Hu, Shun Song, Biyu Xu, Zhiqiang Jin
Summary: The overexpression of MaPIP1;1 in banana was found to enhance the plant's tolerance to multiple stresses by reducing ion leakage and malondialdehyde content, increasing proline, chlorophyll, soluble sugar, and ABA contents. Additionally, the transgenic plants exhibited higher Na+ and K+ content and K+/Na+ ratio under high salt and recovery conditions. The upregulation of ABA biosynthesis and response genes in the transgenic lines under stress conditions indicated a potential mechanism for improved stress resistance.
FRONTIERS IN PLANT SCIENCE
(2021)
Article
Physics, Applied
Bo Sun, Yingying Yu, Hong Wang, Hongyu Zhu, Wenxing Yang
Summary: This study focuses on exciting anti-parallel aligned toroidal dipole arrays in metamaterials and regulating the total energy by producing an antiparallel coupling effect between the toroidal dipoles. Numerical and experimental analyses were conducted on the coupling of toroidal moments in metamaterials. The results show that the geometric parameters of the period play significant roles in altering the resonance response, and when the intensities of two opposite dipoles are similar, the toroidal interaction energy reaches a maximum, increasing the total energy and Q-factor.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2021)
Article
Multidisciplinary Sciences
Liping Bi, Xinye Fan, Chuanchuan Li, Hening Zhao, Wenjing Fang, Huijuan Niu, Chenglin Bai, Xin Wei
Summary: We have designed and analyzed a high-quality factor (Q-factor) and multiple Fano resonances device based on an all-dielectric metastructure. The unit structure consists of two rectangular air holes etched within a silicon cube and periodically aligned on a silicon dioxide substrate. By integrating the theory of bound states in the continuum (BIC) and breaking symmetry, we achieved four Fano resonances which can be modified by altering structural parameters. The proposed metastructures have potential applications in lasers, biosensing, and nonlinear optics.
Article
Nanoscience & Nanotechnology
Mengqi Liu, Changying Zhao
Summary: This study introduces a mechanism to control thermal emission by utilizing high-order antiferromagnetic resonances, achieving ultranarrowband emission control and near-perfect emissivity. By adjusting the width-to-height ratio of nanobars, flexible engineering in a wide waveband is possible.
ACS APPLIED MATERIALS & INTERFACES
(2021)