Article
Chemistry, Multidisciplinary
Fabian Seifert, Helmar Goerls, Stephan Kupfer, Robert Kretschmer
Summary: A tetranuclear magnesium hydride complex with a beta-oxo-delta-diiminate (BODDI) ligand was synthesized. The complex has three bridging mu(2)-hydride atoms and an unprecedented four-coordinate hydride with a nearly square-planar coordination environment in the solid state. Two different coordination polymers are observed depending on the bonding of the axial or equatorial oxygen lone pairs of 1,4-dioxane to magnesium.
CHEMICAL COMMUNICATIONS
(2023)
Article
Computer Science, Software Engineering
Caigui Jiang, Cheng Wang, Xavier Tellier, Johannes Wallner, Helmut Pottmann
Summary: In this article, the geometric properties and modeling capabilities of quad meshes with planar faces are investigated, where the mesh polylines are contained in a single plane. This planarity is advantageous in architectural design and building construction. The design of meshes under the requirement that one half of the mesh polylines are planar (P meshes) is discussed, as well as the geometry and design of meshes where all polylines enjoy this property (PP meshes). Geometric insights, explicit constructions, and an approach to geometric modeling of both P meshes and PP meshes are provided.
ACM TRANSACTIONS ON GRAPHICS
(2023)
Article
Materials Science, Multidisciplinary
Hanna L. B. Bostroem, William R. Brant
Summary: Octahedral tilting is important in perovskite structure and functionality, with high x values favoring tilts and transition metals playing a smaller role. External hydrostatic pressure induces tilt transitions almost regardless of stoichiometry, while thermal transitions only occur under specific conditions.
JOURNAL OF MATERIALS CHEMISTRY C
(2022)
Article
Physics, Applied
Dmitry Levko, Laxminarayan L. Raja
Summary: The self-pulsing behavior of direct-current discharges in planar and curved geometries was studied using a two-dimensional axisymmetric fluid model. The simulation results showed that the nature of self-oscillations is related to the negative differential resistance in the discharge operation, due to the non-linear and non-local dependence of the Townsend ionization coefficient on the electric field. Self-oscillations were attributed to ion transit time instability and were found not to be related to RC resonance or the relation between negative differential resistance and ballast resistance as suggested in the literature.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2021)
Article
Multidisciplinary Sciences
Pagnareach Tin, Michael J. Jenkins, Jie Xing, Nils Caci, Zheng Gai, Rongyin Jin, Stefan Wessel, J. Krzystek, Cheng Li, Luke L. Daemen, Yongqiang Cheng, Zi-Ling Xue
Summary: This study demonstrates that NiBO is a rare two-dimensional metal-organic framework (MOF) Haldane topological material with potential quantum applications.
NATURE COMMUNICATIONS
(2023)
Article
Mathematics
Athanassios S. Fokas, Jonatan Lenells
Summary: This article presents several formulae for the large t asymptotics of the Riemann zeta function, and derives explicit representations and estimates for certain sums. Additionally, it studies a two-parameter generalization of the Riemann zeta function.
MEMOIRS OF THE AMERICAN MATHEMATICAL SOCIETY
(2022)
Article
Chemistry, Multidisciplinary
Rosa Carballo, Ana Belen Lago, Maria Vazquez-Toiran, Laura Estevez, Ezequiel M. Vazquez-Lopez
Summary: An investigation of the coordination chemistry of a Schiff-based ligand (HL) towards Ni(II) acetate was performed using single crystal X-ray diffraction. This study isolated two compounds [Ni(L)(2)]center dot H2O (2) and [Ni(HL)(2)(H2O)(2)](CH3CO2)(2)center dot 2CH(3)CH(2)OH (1a). Two solvated complexes [Ni(L)(2)]center dot solvent (2a, 2b) were also obtained as single crystals. The reactivity of compound 2 with 1,2-di(4-pyridyl)ethylene (bpe) yielded single crystals of [Ni(L)(2)(bpe)(2)]center dot solvent (3).
Article
Materials Science, Multidisciplinary
Abdelkader Khouidmi, Fatima Zohra Dahou, Hadj Baltach, Amel Laref, Mohammed El Amine Monir
Summary: This research investigates the physical properties of the double perovskite oxide Ba2GdNbO6 under the effect of octahedral tilting. The study reveals the structural stability and electronic behavior of the compound, with the main contribution to the magnetic moment coming from the Gd ion. The findings also show a structural transition and semiconductor behavior in the material.
PHILOSOPHICAL MAGAZINE
(2023)
Article
Materials Science, Multidisciplinary
G. D. Dwivedi, Tsung-Wen Yen, S. M. Kumawat, C. W. Wang, D. Chandrasekhar Kakarla, A. Tiwari, H. D. Yang, S. M. Huang, C. M. Chung, S. J. Sun, H. Chou
Summary: Magnetic exchange interactions in Mn3O4 spinel systems are complicated due to magnetic frustration and correlated Jahn-Teller distortion. The tetrahedral-octahedral exchange interaction is the most dominant interaction, while doping of Cr3+ ions reduces the Jahn-Teller distortion and magnetic moment, affecting magnetic anisotropy, exchange interaction, and frustration.
JOURNAL OF MATERIALS CHEMISTRY C
(2023)
Article
Engineering, Electrical & Electronic
Guolong Chen, Ji Wei, Shuaishuai Zhang, Wei Gao, Wuyin Jin, Le Fan
Summary: This research proposes a novel flexible eddy current probe technology, fractal EC sensor technology, to improve crack detection performance. By changing the coil structure of the probe, the consistency in detecting different orientations of short cracks is enhanced, and passive amplification of the signal is achieved by covering a layer of flexible sheet doped with pure iron particles on the probe.
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
(2023)
Article
Robotics
Zherong Pan, Min Liu, Xifeng Gao, Dinesh Manocha
Summary: This research presents an algorithm for computing planar linkage topology and geometry based on a user-specified end-effector trajectory. The algorithm has applications in designing low-cost, modular robots and foldable structures, and provides a semi-automatic method for exploring novel designs given high-level specifications and constraints.
INTERNATIONAL JOURNAL OF ROBOTICS RESEARCH
(2023)
Article
Engineering, Electrical & Electronic
Huan Zhang, Shuo Wang
Summary: This article develops magnetic dipole moment models based on Maxwell's equations for evaluation and reduction of the near magnetic field of inductors in power electronics systems. The developed model considers the magnetic dipole moments from the winding and the air gaps as the near magnetic field source of an inductor. The superposition of these magnetic dipole moments determines the near magnetic field. The developed model can be easily applied to different configurations of inductors with various winding and air gap arrangements for assessing and reducing the near magnetic field. Simulations and experiments are conducted to validate the developed theory.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2022)
Article
Chemistry, Inorganic & Nuclear
Ranjit Bag, Sourav Gayen, Stutee Mohapatra, P. K. Sudhadevi Antharjanam, Jean-Francois Halet, Sundargopal Ghosh
Summary: Researchers successfully synthesized a planar triple-decker metallaborane complex of tungsten and its molybdenum analogue. Through thermolysis reactions, octahedral and bimetallic clusters with different geometries were obtained. These compounds were characterized using spectroscopic and X-ray diffraction analyses, with their stability and structural variation explained by Density-functional theory (DFT) calculations.
JOURNAL OF ORGANOMETALLIC CHEMISTRY
(2021)
Article
Multidisciplinary Sciences
Felix Kuester, Sascha Brinker, Samir Lounis, Stuart S. P. Parkin, Paolo Sessi
Summary: Controlling the interaction between local spins through a superconducting condensate can lead to the combination of magnetism with superconducting technology, opening up new possibilities for innovative quantum technologies.
NATURE COMMUNICATIONS
(2021)
Article
Engineering, Manufacturing
Ercan M. Dede, Yucheng Gao, Yuqing Zhou, Vivek Sankaranarayanan, Feng Zhou, Dragan Maksimovic, Robert W. Erickson
Summary: This article focuses on the thermal design and 3-D package optimization of planar magnetic components for electric vehicle boost DC-DC converters. Optimized features include cold plate structure, PMC cap structure, copper thermal and electrothermal vias, and selection of materials within the package. Numerical modeling shows a significant temperature reduction in the core and PCB winding with the optimized 3-D packaging strategy.
IEEE TRANSACTIONS ON COMPONENTS PACKAGING AND MANUFACTURING TECHNOLOGY
(2021)