Article
Engineering, Multidisciplinary
Ho Yin Wong, Hossein Baninajar, Bert Dechant, Parker Southwick, Jonathan Z. Bird
Summary: This paper presents the design details, testing results, and importance of using laminated magnets and considering eddy current losses in a high mass torque density coaxial magnetic gear (MG) designed for an electric aircraft application. The MG has a gear ratio of 12.4:1 and a calculated total mass torque density of 53 Nm/kg. The tested MG achieved a torque density of 23.5 Nm/kg due to dimensional differences and the use of Garolite support parts.
IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS
(2023)
Article
Automation & Control Systems
Jiuhao Ge, Baowang Hu, Chenkai Yang, Fanwei Yu, Noritaka Yusa
Summary: In this study, an improved eddy current imaging method using the signal of rotating eddy current testing (RECT) was proposed to reconstruct the surface profile of complex cracks. The transformed signals and square current dipole were deconvolved to obtain eddy current images at eight orientations around complex cracks, and the accumulated images were used to reconstruct the surface profile. The results showed that the improved method was effective for complex cracks and stable for cracks with different angles and depths.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2023)
Article
Automation & Control Systems
Zhengya Guo, Kok-Meng Lee, Zhenhua Xiong
Summary: This article presents a distributed current source (DCS) model for predicting the eddy current (EC) induced in a conductor in a magnetic field due to mechanical motion and the EC-generated magnetic flux density (MFD) for measurements. The model is formulated in state-space and solved iteratively in time domain. Experimental validation confirms the accuracy of the model.
IEEE-ASME TRANSACTIONS ON MECHATRONICS
(2022)
Article
Automation & Control Systems
Zhengya Guo, Kok-Meng Lee, Zhenhua Xiong
Summary: This study proposes a distributed current source model for predicting eddy currents and magnetic flux density, which is verified numerically and experimentally for accuracy and parametric effects.
IEEE-ASME TRANSACTIONS ON MECHATRONICS
(2022)
Article
Engineering, Multidisciplinary
Wenxiong Chen, Dehui Wu, Xiaohong Wang, Teng Wang
Summary: Eddy current testing (ECT) is an effective method for non-destructive testing of aviation materials. However, the traditional ECT technology faces difficulties in aircraft inspection due to the need for testing in a large frequency range caused by the use of multiple materials. This paper proposes a self-frequency-conversion ECT method and system, which can detect defects in metal materials and CFRP within a conventional frequency range.
Review
Chemistry, Multidisciplinary
Aris Chatzichristos, Jamal Hassan
Summary: Confined water inside carbon nanotubes has unique properties and wide applications. This review provides an overview of the properties of water in carbon nanotubes, based on nuclear magnetic resonance and molecular dynamics studies. It explains contradictory results in the literature and identifies debatable issues, open problems, and future research directions.
Article
Chemistry, Multidisciplinary
Hyun Woo Kim, Chen Zhang, Raphael Reher, Mingxun Wang, Kelsey L. Alexander, Louis-Felix Nothias, Yoo Kyong Han, Hyeji Shin, Ki Yong Lee, Kyu Hyeong Lee, Myeong Ji Kim, Pieter C. Dorrestein, William H. Gerwick, Garrison W. Cottrell
Summary: DeepSAT is a neural network-based system that extracts chemical features from NMR spectra to efficiently assist in the identification of molecular structures.
JOURNAL OF CHEMINFORMATICS
(2023)
Article
Engineering, Electrical & Electronic
Rodrigo B. Bronzeri, Ivan E. Chabu
Summary: This study validates a new topology of magnetic coupling and successfully adjusts power transmission using eddy current coupling technology. Compared to motor-driven water pumps, this technology consumes less electrical current and effectively protects the engine from overheating.
IEEE TRANSACTIONS ON TRANSPORTATION ELECTRIFICATION
(2021)
Article
Multidisciplinary Sciences
Jaimin Kang, Jeongchun Ryu, Jong-Guk Choi, Taekhyeon Lee, Jaehyeon Park, Soogil Lee, Hanhwi Jang, Yeon Sik Jung, Kab-Jin Kim, Byong-Guk Park
Summary: Antiferromagnets show potential for spintronics due to their ability to be manipulated electrically without the need for heavy metal layers. Kang et al demonstrate electrical manipulation of exchange bias in IrMn/NiFe bilayers, providing a promising pathway for the development of nanoscale multi-level antiferromagnetic spintronic devices. This research highlights the potential for utilizing antiferromagnetic materials in next-generation ultrafast and high-density integration devices.
NATURE COMMUNICATIONS
(2021)
Article
Engineering, Electrical & Electronic
Zhi Gong, Shiyou Yang
Summary: By using metamaterials as probe cores, the proposed approach offers increased detection signals and sensitivity, showing superior performance over the traditional NERSE technique. The convenience and versatility of the proposed MTM-core probe in engineering applications are highlighted when compared with existing methods.
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
(2021)
Article
Geochemistry & Geophysics
Yingfeng Sun, Yixin Zhao, Yulin Li, Nima Noraei Danesh, Zetian Zhang
Summary: The liquid nitrogen freeze-thaw cycle has a positive impact on the multiscale structure evolution of coal samples, improving the connectivity between mesopores and macropores and promoting the formation and expansion of microscopic fractures. The initial NMR porosity of deep coal is lower than that of shallow coal, but both increase with the number of freeze-thaw cycles, with a lower growth rate for deep samples.
Article
Computer Science, Information Systems
Xiangli Li, Lezhi Ye, Mingfei Li, Qiang Lv
Summary: This paper proposes an optimized design of an eddy current retarder, which solves the problem of decreased braking torque due to high temperature in traditional eddy current retarders by utilizing water-cooling technology. The relationship between braking torque and working time was analyzed using a multi-field coupling model, and the simulation results were validated through bench testing. The study provides a theoretical basis for the optimal design of eddy current retarders in long-slope transportation scenarios.
Article
Engineering, Electrical & Electronic
Jiheng Jing, Sameh Tawfick, Gaurav Bahl
Summary: Magneto-Mechanical transmitters are a compact and low-power solution for generating ultralow-frequency magnetic signals for through-ground and through-seawater communications. Resonant arrays of smaller magneto-mechanical transmitters can increase operating frequency and reduce power requirements. This study introduces a generalized model that accurately predicts frequency and mode shape in magneto-mechanical resonator arrays, considering near-field magnetic interactions and magnetically induced nonlinearity. Experimental results show improved predictive capability compared to simplified dipole approximations, and the modeled eddy current losses align with experimental observations.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2023)
Article
Neurosciences
Hasan H. Eroglu, Oula Puonti, Cihan Goeksu, Frodi Gregersen, Hartwig R. Siebner, Lars G. Hanson, Axel Thielscher
Summary: Magnetic resonance current density imaging (MRCDI) faces challenges like low signal-to-noise ratio and incomplete data coverage. Using a personalized volume conductor model is more beneficial for current density estimation than the projected current density algorithm, and statistical testing approach helps evaluate the quality of reconstructed images.
Article
Engineering, Multidisciplinary
Guillaume Francois, Bruno Dehez
Summary: This article discusses the capabilities and challenges of using printed circuit board (PCB) technology in winding production, as well as the current conventional solution and a new approach proposed in this study to reduce eddy current losses.
IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS
(2022)
Article
Biochemical Research Methods
Patrick Judeinstein, Filippo Ferdeghini, Rodrigo Oliveira-Silva, Jean-Marc Zanotti, Dimitrios Sakellariou
JOURNAL OF MAGNETIC RESONANCE
(2017)
Article
Biochemical Research Methods
Michael C. D. Tayler, Dimitrios Sakellariou
JOURNAL OF MAGNETIC RESONANCE
(2017)
Article
Multidisciplinary Sciences
Ching-Yu Chou, Mouna Abdesselem, Cedric Bouzigues, Minglee Chu, Angelo Guiga, Tai-Huang Huang, Fabien Ferrage, Thierry Gacoin, Antigoni Alexandrou, Dimitris Sakellariou
SCIENTIFIC REPORTS
(2017)
Article
Instruments & Instrumentation
A. Ajoy, X. Lv, E. Druga, K. Liu, B. Safvati, A. Morabe, M. Fenton, R. Nazaryan, S. Patel, T. F. Sjolander, J. A. Reimer, D. Sakellariou, C. A. Meriles, A. Pines
REVIEW OF SCIENTIFIC INSTRUMENTS
(2019)
Article
Chemistry, Multidisciplinary
Joao Marreiros, Lenz Van Dommelen, Guillaume Fleury, Rodrigo de Oliveira-Silva, Timothee Stassin, Paul Iacomi, Shuhei Furukawa, Dimitrios Sakellariou, Philip L. Llewellyn, Maarten Roeffaers, Rob Ameloot
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2019)
Article
Biochemical Research Methods
Rodrigo de Oliveira-Silva, Everton Lucas-Oliveira, Arthur Gustavo de Araujo-Ferreira, Willian Andrighetto Trevizan, Edson Luiz Gea Vidoto, Dimitrios Sakellariou, Tito Jose Bonagamba
Summary: This article discusses the development of a new benchtop single-sided NMR system for petroleum science and engineering, emphasizing its application and importance in studying oil reservoir rocks.
JOURNAL OF MAGNETIC RESONANCE
(2021)
Article
Biochemistry & Molecular Biology
Pieter De Wever, Rodrigo de Oliveira-Silva, Joao Marreiros, Rob Ameloot, Dimitrios Sakellariou, Pedro Fardim
Summary: The study found that the addition of carboxymethyl cellulose can enhance the swelling capacity and water mobility of hydrogel beads, affecting the interaction between the beads and water. Additionally, bead swelling leads to a reduction in surface-bound water, increasing water mobility inside the hydrogels.
Article
Food Science & Technology
Huong T. T. Pham, Dario J. Pavon-Vargas, Carolien Buve, Dimitrios Sakellariou, Marc E. Hendrickx, Ann M. Van Loey
Summary: For the first time, a model system approach was combined with H-1 NMR fingerprinting to study non-enzymatic browning in pasteurized shelf-stable orange juice during storage. The model systems displayed a three-phase browning development, with the degradation of ascorbic acid and reactions of sugars and amino acids playing key roles in the process. The application of H-1 NMR on simple and complex model systems revealed the degradation pathways and main reactions leading to differences in samples throughout storage. Further advanced NMR experiments may be needed to identify unknown compounds in NEB reactions.
FOOD RESEARCH INTERNATIONAL
(2021)
Article
Chemistry, Multidisciplinary
Joao Marreiros, Rodrigo De Oliveira-Silva, Paul Iacomi, Philip L. Llewellyn, Rob Ameloot, Dimitrios Sakellariou
Summary: The use of gas or vapor probe molecules for physisorption is a common technique for characterizing porous materials, while low-field NMR can offer additional insights into local dynamics. By selectively measuring H-1 spins of adsorbed molecules, NMR-relaxation technique provides information beyond physisorption alone. This approach was demonstrated to be effective for studying microporous metal-organic frameworks.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2021)
Article
Chemistry, Multidisciplinary
Jef R. Vanhoof, Pieter J. De Smedt, Besir Krasniqi, Rob Ameloot, Dimitrios Sakellariou, Dirk E. De Vos
Summary: The study reported a method for electrocatalytic N-H aziridination of simple aromatic alkenes using ammonia as a nitrogen source, achieving high yields up to 98% with H-2 as the only byproduct. The use of iodide as a redox mediator was essential for obtaining the desired products, with mechanistic studies revealing the formation of NH2I as a reactive species involved in the aziridination.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2021)
Article
Chemistry, Multidisciplinary
Sven Robijns, Julien Devos, Thibaut Donckels, Rodrigo de Oliveira-Silva, Niels De Witte, Dimitrios Sakellariou, Tom R. C. Van Assche, Michiel Dusselier
Summary: Recent breakthroughs have made it possible to have a better control over the properties of zeolites, which is of great significance in the field of zeolite catalysis or adsorbents.
CRYSTAL GROWTH & DESIGN
(2022)
Article
Green & Sustainable Science & Technology
Maarten Everaert, Olivier Duboc, Elden Willems, Gerhard Soja, Christoph Pfeifer, Niels Van Velthoven, Rodrigo de Oliveira-Silva, Dimitrios Sakellariou, Jakob Santner
Summary: Boron (B) fertilizers are crucial for global crop production. A study investigated thermochemical treatments to process cellulose fiber insulation waste into a slow-release B fertilizer, achieving slow-release properties through the formation of sparingly soluble Ca-B phases. Results showed the potential of slow-release B in reducing toxicity and leaching losses, indicating its effectiveness as a B application method.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Chemistry, Physical
Iurii Alekseevich Babkin, Aniket Pradip Udepurkar, Hannes Van Avermaet, Rodrigo de Oliveira-Silva, Dimitrios Sakellariou, Zeger Hens, Guy van den Mooter, Simon Kuhn, Christian Clasen
Summary: Quantum dots (QDs) are semiconductor nanocrystals used in optoelectronic applications. Most modern QDs are based on toxic metals and do not comply with EU regulations. However, there are promising developments in safer QD alternatives based on elements from the III-V group. This study focuses on encapsulating InP-based QDs in polymer microbeads for improved photostability.
Article
Chemistry, Multidisciplinary
Anthony De Bruyne, Wouter Stuyck, Jarne Leinders, Willem Deleu, Carlos Marquez, Kwinten Janssens, Dimitrios Sakellariou, Ruben Ghillebert, Dirk E. De Vos
Summary: We developed a two-step process to produce biobased plasticizers from citric acid. The process involves dehydration-hydrogenation of citric acid followed by a Fischer esterification. The resulting tributyl propane-1,2,3-tricarboxylate (TBPTC) can be used as a plasticizer in PVC with a high overall yield of 90%.
Article
Nuclear Science & Technology
Rodrigo de Oliveira-Silva, Agathe Belime, Clemence Le Coeur, Alexis Chenneviere, Arnaud Helary, Fabrice Cousin, Patrick Judeinstein, Dimitrios Sakellariou, Jean-Marc Zanotti
JOURNAL OF NEUTRON RESEARCH
(2019)