Article
Materials Science, Ceramics
Devendra K. Namburi, Kirti Singh, Kai Yuan Huang, Suresh Neelakantan, John H. Durrell, David A. Cardwell
Summary: This study presents a detailed investigation into the microstructural and mechanical properties of recycled YBCO samples compared to primary grown samples. Despite a slightly lower trapped magnetic field, recycled samples show an improvement in mechanical properties such as flexural strength. Good correlations between microstructural parameters and mechanical properties were observed in both primary grown and recycled YBCO samples.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2021)
Article
Materials Science, Ceramics
Kai Yuan Huang, Tomas Hlasek, Devendra Kumar Namburi, Anthony R. Dennis, Yunhua Shi, Mark D. Ainslie, Jasmin V. J. Congreve, Vladimir Plechacek, Jan Plechacek, David A. Cardwell, John H. Durrell
Summary: The use of thin-wall geometry can significantly improve the mechanical properties of high-temperature superconductors, allowing them to withstand higher electromagnetic stresses.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2021)
Article
Physics, Applied
Yuchen Wang, Mark D. Ainslie, Difan Zhou, Yibing Zhang, Chuanbing Cai, John H. Durrell, David A. Cardwell
Summary: The practical magnetization of arrays of multiple single grain, bulk high temperature superconductors is crucial for various applications. A systematic investigation of the pulsed field magnetization (PFM) of a bulk assembly consisting of two rectangular Y-Ba-Cu-O bulk single grains was conducted. The induced screening currents during the rise of a pulsed field greatly enhance the flux density, resulting in uneven flux penetration and increased likelihood of flux jumps. By utilizing a two-step multi-pulse PFM process, the peak trapped field was significantly improved.
SUPERCONDUCTOR SCIENCE & TECHNOLOGY
(2023)
Article
Physics, Applied
Josef Baumann, Yunhua Shi, Anthony R. Dennis, John H. Durrell, David A. Cardwell
Summary: We report the direct impact of porosity on the critical current density of a single grain YBCO bulk superconductor using 3D x-ray computer tomography scans and superconducting quantum interference device measurements. The study shows that porosity has a considerably more substantial impact on the measured critical current density than Y-211 on the micrometre scale, with a decrease in porosity leading to an increase in J (c). Any method that can reduce porosity improves J (c) and the trapped field of these technologically important bulk superconductors.
SUPERCONDUCTOR SCIENCE & TECHNOLOGY
(2023)
Article
Physics, Applied
N. Tutt, J. Congreve, Y. Shi, D. Namburi, A. Dennis, H. Druiff, J. Durrell
Summary: This study presents a technique of fabricating superconducting joints between GdBCO-Ag bulk superconductors using YBCO-Ag as an intermediate joining material. The joints provide reliable connections between multiple bulk superconductors, addressing the challenges in fabricating large superconductors or shaping hard and brittle ones. The experiment joined nine single grains of GdBCO-Ag with a YBCO-Ag intermediate and investigated the effect of different orientations on the superconducting properties of jointed samples. The results showed that the jointing process led to degradation of critical temperature and critical current, as well as inhibited current flow due to silver diffusion and formation of large pores at the joint interface.
SUPERCONDUCTOR SCIENCE & TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Wenchao Li, He Huang, Chen Guo, Chang Tu, Xinyuan Liu, Chao Yao, Xianping Zhang, Yanwei Ma
Summary: Iron-based superconductors have attracted extensive attention in the field of superconductivity mechanisms and high-field applications due to their ultra-high upper critical fields and low anisotropy. The fabrication of superconducting wires and tapes with high critical current density and low cost is a major goal in the application research of these materials. In this study, (Ba,K)Fe2As2 (Ba-122) tapes with a Cu/Ag composite sheath were successfully fabricated through a pre-composite process, and achieved a high J(c) of 6.2 x 10(4) A cm(-2) at 10 T and 4.2 K. The high-density superconducting cores, large-size grains, and uniform element distribution were identified as the main factors contributing to the high J(c). These results suggest that the low-cost Ba-122 tapes with pre-composite Cu/Ag sheath have great potential for practical applications in the future.
SCIENCE CHINA-MATERIALS
(2023)
Article
Physics, Applied
Difan Zhou, Jan Srpcic, Kaiyuan Huang, Mark Ainslie, Yunhua Shi, Anthony Dennis, Martin Boll, Mykhaylo Filipenko, David Cardwell, John Durrell
Summary: The study reports a 4.8 T peak trapped magnetic field achieved in a 36 mm diameter GdBa2Cu3O7-delta-Ag bulk superconductor at 30K using pulsed field magnetization. A reliable two-step multi-pulse PFM process based on the understanding and exploitation of avalanche-like flux jump phenomenon in these materials was developed to achieve this. The applied pulsed magnetic field necessary for trapping 4.8 T was only 5.29 T, with a remarkable magnetization efficiency of 90% (BT/Ba).
SUPERCONDUCTOR SCIENCE & TECHNOLOGY
(2021)
Article
Materials Science, Ceramics
Qianying Zhu, Yangyang Cai, Zheng Liu, Keqian Gong, Zhentao Wang, Litao Li, Yong Zhang
Summary: The influence of Cu interlayer thickness on the microstructure and mechanical properties of Al2O3/4J42 joints was investigated. The results show that the Cu interlayer thickness determines the microstructure and mechanical properties of the joints. When the Cu interlayer thickness is 50 mu m, the joint exhibits a discontinuous structure and a significant decrease in shear strength due to Ti diffusion. However, when the Cu interlayer thickness increases to 100 mu m, the joint shows maximum shear strength because Ti diffusion is prevented and residual stress is released.
CERAMICS INTERNATIONAL
(2023)
Article
Physics, Multidisciplinary
Anita Kumari, Rakhi Sharma, Radhika Chauhan, B. D. Indu
Summary: This study analyzes the thermal conductivity of rare earth substituted high temperature superconductors and investigates the role of various scattering processes in thermal transport. The study finds that boundary scattering is the main contributor to thermal resistance at very low temperatures and explores the anisotropic nature of thermal conductivity in single-crystal YBCO.
Article
Materials Science, Multidisciplinary
Bernd Wolf, Theresa Lundbeck, Jan Zimmermann, Marius Peters, Kristin Kliemt, Cornelius Krellner, Michael Lang
Summary: In this study, the magnetic susceptibility of high-quality single crystals of EuPd2(Si1-xGex)2 with Ge concentrations 0 ≤ x ≤ 0.105 was measured under varying hydrostatic pressure (He-gas) of 0 to 0.5 GPa. The results reveal that the magnetic response changes drastically from valence-crossover behavior to long-range antiferromagnetic order as the Ge concentration increases to x = 0.105. The valence-crossover temperature shows a strong pressure dependence, while the pressure dependence of the antiferromagnetic order is small.
Article
Physics, Applied
Y. Tsui, D. A. Moseley, A. R. Dennis, Y-H Shi, M. R. Beck, V Cientanni, D. A. Cardwell, J. H. Durrell, M. D. Ainslie
Summary: Bulk high-temperature superconducting materials can trap magnetic fields up to an order of magnitude larger than conventional permanent magnets. Recent advances in pulsed field magnetization techniques have allowed for the fast and cost-effective magnetization of these materials to fields of up to 5 T. Researchers have developed a portable, desktop magnet system that combines advanced pulsed field magnetization techniques with cryocooler technology and single-grain bulk superconducting materials. This system is capable of trapping magnetic fields of up to about 3 T.
SUPERCONDUCTOR SCIENCE & TECHNOLOGY
(2022)
Article
Physics, Applied
Guo-Zheng Li, Chao Chen, Miao Wang
Summary: The doping effect of BiFeO3 (BFO) nanoparticles on the growth and properties of Y-Ba-Cu-O (YBCO) superconductors by the powder melt and infiltration growth technique was investigated. The results showed that nano-BFO doping reduced the growth rate of the Y-123 crystal and led to smaller grain size in the YBCO bulk. Improved levitation force and trapped field properties were observed in the 0.2 wt% BFO-doped YBCO sample, indicating superior performance compared to other samples with different BFO amounts.
SUPERCONDUCTOR SCIENCE & TECHNOLOGY
(2021)
Article
Engineering, Electrical & Electronic
Jakub Skocdopole, Michal Lojka, Tomas Hlasek, Filip Antoncik, Ondrej Jankovsky, Ladislav Kalvoda
Summary: Ionized jet deposition (IJD) is a Physical Vapor Deposition (PVD) technique suitable for depositing a wide range of materials on solid substrates. This study investigates the influence of target stoichiometry on the chemical composition of prepared YBCO thin films and examines the transport coefficients under experimental conditions based on observed data.
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY
(2021)
Article
Chemistry, Analytical
Annick Degardin, David Alamarguy, Aurore Brezard Oudot, Samir Beldi, Christine Chaumont, Faouzi Boussaha, Antoine Cheneau, Alain Kreisler
Summary: This study investigates the performance of detectors made from calcium-doped and undoped a-YBCO films. The calcium-doped material shows lower DC conductivity and a slightly rougher surface compared to the undoped material. The calcium-doped device exhibits higher specific detectivity and shorter thermal time constant, suggesting significant improvements for fast infrared imaging applications.
Article
Engineering, Electrical & Electronic
Yee Kin Tsui, Dominic Moseley, A. R. Dennis, Yunhua Shi, Michael Beck, Vito Cientanni, David Cardwell, John Durrell, Mark Ainslie
Summary: The potential application of ring-shaped, single grain RE-Ba-Cu-O bulk superconductors in MRI and NMR systems as an alternative to conventional permanent magnets could be significantly improved by optimizing the waveform of the magnetizing pulse used in the pulsed field magnetization (PFM) method.
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY
(2022)
Article
Environmental Studies
Farrukh Shahzad, Zeeshan Fareed, Yong Wan, Yihan Wang, Zohaib Zahid, Muhammad Irfan
Summary: This study provides empirical evidence on the relationship between clean energy intensity (CEI) and carbon dioxide (CO2) emissions among the world's top ten renewable energy consumer countries. The findings suggest that funding renewable energy industries can help minimize CO2 emissions and achieve sustainable development goals.
ENERGY & ENVIRONMENT
(2023)
Article
Environmental Sciences
Marise Silva de Carvalho, Luiz Henrique Sales de Menezes, Adriana Bispo Pimentel, Floriatan Santos Costa, Polyane Cabral Oliveira, Marta Maria Oliveira dos Santos, Iasnaia Maria de Carvalho Tavares, Muhammad Irfan, Muhammad Bilal, Joao Carlos Teixeira Dias, Julieta Rangel de Oliveira, Marcelo Franco
Summary: In this study, a comprehensive investigation was conducted on the production of xylanase by solid-state fermentation using Aspergillus oryzae ATCC 10124. Enzyme production was optimized through statistical designs for both the mixture of waste residues and fermentation parameters. The optimized process resulted in a significant increase (up to 165%) in enzymatic activity. The xylanase produced in this fermentation process exhibited alkaline characteristics and high thermal stability. Moreover, the multienzyme extract obtained directly from the fermentation process showed efficient saccharification capabilities without the need for enzyme purification.
WASTE AND BIOMASS VALORIZATION
(2023)
Article
Environmental Sciences
Shahid Ali, Qingyou Yan, Azer Dilanchiev, Muhammad Irfan, Shah Fahad
Summary: The study aims to evaluate the performance of adopting solar home systems (SHSs) to develop small-scale industries in Pakistan. The results indicate that SHSs can provide low-cost energy for small-scale industries, improve energy supply quality, and with the moderating effect of awareness and understanding of SHSs, enhance the performance of small-scale industries.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Business, Finance
Mubeen Abdur Rehman, Muhammad Irfan, Muhammad Abubakr Naeem, Brian M. Lucey, Sitara Karim
Summary: The considerable deployment of central bank digital currencies (CBDCs) is imminent, but it faces political, technological, and legal challenges. This study summarizes additional challenges that have been overlooked and examines the potential impact of a broad version of money on financial stability. Using time series data and historical behavior of financial innovation, the study scrutinizes the hypothetical influence of CBDCs on financial stability and inflation, employing McCallum's policy rule based on money growth. The simulations indicate that CBDCs do not result in higher inflation but may pose risks to financial stability. The study also suggests necessary policy implications.
RESEARCH IN INTERNATIONAL BUSINESS AND FINANCE
(2023)
Article
Materials Science, Multidisciplinary
Souraya Goumri-Said, Mazhar Ali Shah, Sikander Azam, Muhammad Irfan, Mohammed Benali Kanoun
Summary: The Tl3AsSe3 compound is identified as a promising novel material for multifunctional applications. It exhibits indirect bandgap semiconducting properties with bandgaps of 1.5 eV and 1.9 eV. The compound also shows positive refractive index, making it a good candidate for optoelectronic applications.
CURRENT APPLIED PHYSICS
(2023)
Article
Biochemical Research Methods
Samreen Mohsin, Muhammad Irfan, Kauser Abdulla Malik, Asma Maqbool
Summary: In this study, overexpression of the PDX2 gene from Arabidopsis under an endosperm-specific promoter was shown to enhance vitamin B6 accumulation in wheat seeds. Transgenic lines of two wheat varieties were generated with transformation efficiencies of 2.11% and 1.09%. The highest gene expression level observed was 22.49-fold, resulting in a 6.49-fold increase in B6 accumulation. Vitamin B6 accumulation did not affect chlorophyll content but significantly decreased soluble protein content in some transgenic lines. In addition, some transgenic lines exhibited increased seed yield without changes in other important traits. However, the transgenic lines did not show enhanced resistance to salt stress despite the increased vitamin B6 accumulation.
PLANT MOLECULAR BIOLOGY REPORTER
(2023)
Article
Physics, Multidisciplinary
Abdulkarem H. M. Almawgani, Mai Medhat, Ahmed Mehaney, Ghassan Ahmed Ali, Muhammad Irfan, Hussein A. Elsayed
Summary: In this study, we have theoretically introduced the reflectance spectrum of one-dimensional metamaterial photonic crystals based on the effective medium theory and transfer matrix formulism. The candidate structure consists of two metamaterials, hyperbolic and gyroidal metamaterials. The numerical results demonstrate the emergence of an angle-insensitive photonic bandgap within the wavelength range of 2.5 μm to 4 μm. Additionally, the impact of filling fraction, periodicity number, and thicknesses on the reflectivity of the proposed reflector has been investigated. This structure shows promise as an angle-insensitive reflector for various solar energy applications.
EUROPEAN PHYSICAL JOURNAL PLUS
(2023)
Article
Engineering, Biomedical
Sheeza Masud, Hira Munir, Muhammad Irfan, Muhammad Tayyab
Summary: The green synthesis of Allium cepa bulb-based zinc oxide nanoparticles was performed successfully for various applications including antimicrobial, antidiabetic, and antioxidant potential. The synthesis involved the reduction and stabilization of zinc ions using phytocompounds found in the AC bulb. The resulting ZnO-NPs were characterized by changes in color, ultraviolet-visible spectroscopic analyses, and infrared spectrum. The nanoparticles displayed good inhibitory effects on antioxidants and proved to be effective in managing microbial infections and diabetes. The use of AC-bulb-based ZnO-NPs represents an innovative addition to the field of free radical scavenging and healthcare management.
BIOINSPIRED BIOMIMETIC AND NANOBIOMATERIALS
(2023)
Correction
Environmental Sciences
Qing Wei, Wendong Xiao, Rana Muhammad Shahid Yaqub, Muhammad Irfan, Muhammad Murad, Muhammad Zafar Yaqub
FRONTIERS IN ENVIRONMENTAL SCIENCE
(2023)
Article
Geosciences, Multidisciplinary
Changjian Pan, Juan Felipe Espinosa Cristia, Muhammad Irfan, Zejiang Pan, Wafa Ghardallou, Muhammad Tahir, Basit Ali
Summary: Ecological footprint (EF) is created by human demands for water, infrastructure, energy and food, resulting in pollution, resource depletion and ecological disturbance. The sustainability goal is to reduce climate change impact on natural resources for long-term growth. Pakistan, facing an ecological deficit, struggles to balance economic development and environmental protection globally. EF has become a global phenomenon due to its significant role in achieving sustainability, vital for human life.
GEOLOGICAL JOURNAL
(2023)
Article
Environmental Sciences
Muhammad Shoaib, Muhammad Adnan Munir, Muhammad Yasin Naz, Ghulam Abbas, Muhammad Irfan, Saifur Rahman, Abdulnour Ali Jazem Ghanim
Summary: The limited availability of clean water due to worldwide population growth and pollution necessitates the development of rapid water purification techniques. Photocatalytic degradation using the ZnO/MgFe2O4 heterostructure photocatalyst demonstrates high efficiency in eliminating water pollutants. The presence of magnetic ferrite in the heterostructure promotes radiation absorption, reduces electron-hole recombination, and improves charge transfer. The heterostructure photocatalyst also exhibits high stability and easy removal.
WATER AIR AND SOIL POLLUTION
(2023)
Article
Computer Science, Information Systems
Muhammad Irfan, Ahmad Shaf, Tariq Ali, Umar Farooq, Saifur Rahman, Salim Nasar Faraj Mursal, Mohammed Jalalah, Samar M. Alqhtani, Omar AlShorman
Summary: Early diagnosis of brain tumors is crucial and can improve the chances of successful treatment and survival. This study introduces a hybrid intelligent deep learning technique that utilizes multiple pre-trained models and their integration for computer-aided detection and localization of brain tumors. The U-Net model achieves the highest performance with 95% accuracy among the pre-trained models, while the combination of U-Net and ResNet-50 outperforms all other models in classifying and segmenting the tumor region.
CMC-COMPUTERS MATERIALS & CONTINUA
(2023)
Article
Medicine, General & Internal
Hasan Akbar Khan, Muhammad Shuaib, Saman Sabir, Ayesha Aimen, Murtaza Bukhari, Muhammad Irfan
Summary: The frequency of silent myocardial ischemia (SMI) in type 2 diabetes mellitus (T2DM) patients with microalbuminuria was found to be 41.9% in this study, highlighting the importance of early diagnosis and management of T2DM and microalbuminuria to prevent cardiovascular events.
GOMAL JOURNAL OF MEDICAL SCIENCES
(2023)
Article
Environmental Sciences
Abdul Rauf, Naila Nureen, Muhammad Irfan, Madad Ali
Summary: Solar photovoltaic (PV) is a novel and eco-friendly power source. India has vast solar resources and significant growth in the solar PV sector. Understanding the development path and features of the industry is essential to meet the expanding PV power market in India.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Environmental Sciences
Mirza Huzaifa Asif, Tan Zhongfu, Muhammad Irfan, Bilal Ahmad, Madad Ali
Summary: The energy needs of Pakistan have increased significantly in recent years due to improved lifestyle, population growth, and economic development. However, research on sustainable consumption behavior, specifically related to energy-saving home appliances, is limited in the country. This study aims to fill this research gap by analyzing the factors that influence sustainable consumption behavior in Pakistan, including eco-label knowledge, attitude toward environment, and customer green trust. The findings indicate that eco-label knowledge, attitude toward environment, and customer green trust positively influence purchase intention, highlighting the importance of promoting sustainable consumption practices in the country.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
