Article
Engineering, Mechanical
Xiaoying Hu, Chunyan Zhou
Summary: In this study, a nonlinear quasi-zero-stiffness (QZS) vibration isolation system with nonlinear hysteretic damping is investigated. The effects of nonlinear damping on the bounded response and isolation performance are verified through numerical simulations and vibration tests.
NONLINEAR DYNAMICS
(2022)
Article
Engineering, Civil
Thu Dao, Tomomi Yagi, Kyohei Noguchi, Haruki Fukushima, Gabriel Mohallem, Tung Do
Summary: This study experimentally investigated the generation mechanism of wake galloping between two staggered cylinders of equal diameter, and found that certain arrangements could lead to hysteresis-supported wake galloping. The addition of spiral protuberances on the surface of the cylinders suppressed the wake galloping.
JOURNAL OF WIND ENGINEERING AND INDUSTRIAL AERODYNAMICS
(2022)
Article
Engineering, Marine
Theodoros Nitis, Nicolas Moussiopoulos
Summary: This paper highlights the role of geoinformatics in coastal meteorology and climatology, specifically in improving the performance of a Mesoscale Meteorological Model. The development of a new scheme utilizing satellite data and Geographic Information Systems is evaluated using the coastal Metropolitan Area of Athens as a case study. The results show a general improvement in model performance, with temperature showing the best improvement, followed by wind direction and wind speed.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2021)
Article
Engineering, Electrical & Electronic
Wenpeng Zhou, Biao Zhao, Ruihang Bai, Yantao Lou, Xiaoping Sun, Qi Liu, Jiapeng Liu, Zhengyu Chen, Jinpeng Wu, Zhanqing Yu, Rong Zeng
Summary: This article provides a comprehensive analysis and experiment on extreme faults in MMC based on IGCT, and proposes a protection solution based on CP-IGCT and HS-FRD. The surge current capability of HS-FRD is successfully validated, and theoretical calculation shows that the proposed solution can reduce the maximum fault current and realize the discharge of the dc capacitor. Compared to IGBT, this solution has the lowest cost, complexity, and highest safety.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2023)
Article
Materials Science, Coatings & Films
Julio Mora, Paloma Garcia, Francisco Carreno, Miguel Gonzalez, Marcos Gutierrez, Laura Montes, Victor Rico Gavira, Carmen Lopez-Santos, Adrian Vicente, Pedro Rivero, Rafael Rodriguez, Silvia Larumbe, Carolina Acosta, Pablo Ibanez-Ibanez, Alessandro Corozzi, Mariarosa Raimondo, Rafal Kozera, Bartlomiej Przybyszewski, Agustin R. Gonzalez-Elipe, Ana Borras, Francisco Redondo, Alina Aguero
Summary: The development of anti-icing robust surfaces is crucial in industries such as aeronautics and wind energy. Existing anti-icing strategies are insufficient, especially in large unprotected areas where secondary icing may occur. This study proposes a new testing methodology to evaluate accretion mechanisms and secondary icing phenomena of different anti-icing materials. The results reveal the strengths and weaknesses of each material, emphasizing the need for tailored solutions to effectively protect specific components in systems.
SURFACE & COATINGS TECHNOLOGY
(2023)
Article
Mechanics
Andrea Salvatore
Summary: This work investigates the nonlinear response of a hysteretic multi-stable vibration isolation system under impulsive excitations. The performances of the studied isolation system are numerically evaluated, and it is shown that the system can effectively suppress accelerations and displacements.
INTERNATIONAL JOURNAL OF NON-LINEAR MECHANICS
(2023)
Article
Multidisciplinary Sciences
Josef Ludescher, Maria Martin, Niklas Boers, Armin Bunde, Catrin Ciemer, Jingfang Fan, Shlomo Havlin, Marlene Kretschmer, Juergen Kurths, Jakob Runge, Veronika Stolbova, Elena Surovyatkina, Hans Joachim Schellnhuber
Summary: Network theory, emerging from complex systems science, offers critical predictive power for addressing global warming crisis and other societal challenges, with notable improvements in forecasting high-impact phenomena, such as El Nino events and extreme rainfall, compared to traditional numerical modeling.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2021)
Article
Construction & Building Technology
Yan Lyu, Yiqun Pan, Xiaolei Yuan, Mingya Zhu, Zhizhong Huang, Risto Kosonen
Summary: The paper introduces a comprehensive method for evaluating the plant rooms of centralized air-conditioning systems in commercial buildings, utilizing Building Performance Simulation models and real HVAC design cases. Through comparing expert decision-making process with evaluation results, the reasonability of the method is confirmed.
Article
Business
Mats Alvesson, Jorgen Sandberg
Summary: Good research involves not only empirical work on established phenomena, but also the construction of phenomena for investigation and theorization. As few phenomena are straightforward to observe, researchers need to carefully and creatively construct the phenomenon under investigation. A proposed framework enables researchers to generate and establish research phenomena beyond their specific area of interest, leading to more imaginative and impactful research.
JOURNAL OF MANAGEMENT STUDIES
(2023)
Article
Construction & Building Technology
Song Gao, Yuan Ji, Zhenwei Qin, Hengwu Zhang, Fei Xing, Ang Liu
Summary: This paper investigates the influence of admixtures on the pore structure of recycled aggregate concrete (RAC). The results show that an appropriate amount of admixture can reduce the porosity and pore diameter of RAC, and improve its pore structure. The pozzolanic effect of silica fume (SF) enhances the compactness of RAC and decreases the porosity of the interface transition zone (ITZ), leading to improved mechanical properties and chloride ion permeability resistance.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
M. Bahri, B. Shi, K. Djebbi, M. A. Elaguech, D. Zhou, M. Ben Ali, C. Tlili, D. Wang
Summary: Graphene, known for its exceptional electron mobility and thermal conductivity, has been widely used in various applications since the discovery of the mechanical exfoliation method over a decade ago. However, achieving defect-free ultra-clean transfer of graphene remains crucial for the efficiency of large-area graphene devices.
MATERIALS TODAY CHEMISTRY
(2021)
Article
Materials Science, Characterization & Testing
Yichong Chen, Jiabao Yu, Yijie Ling, Shun Yao, Xiulei Jiang, Dongdong Hu, Huifeng Wang, Ling Zhao
Summary: The mechanical properties of microcellular polypropylene prepared by supercritical CO2 compression foaming were studied and a comprehensive calculation model was established to predict the elastic modulus of different foam materials. It was found that the bubble size affected the compressive and flexural elastic modulus, while the counter-acting force of gas had varying effects on different types of elastic modulus.
Article
Chemistry, Analytical
Shanhong Wei, Yanzhi Dou, Shiping Song, Tie Li
Summary: A functionalized biosensor based on graphene-based field effect transistor (GFET) was developed for ultrasensitive and label-free detection of beta-galactosidase (beta-gal) produced by Escherichia coli (E. coli) in real water samples. The biosensor exhibited a wide concentration dynamic range, attomole sensitivity, and selective recognition ability, making it useful for future environmental monitoring requirements.
Article
Engineering, Civil
Ran Deng, Jun-De Yang, Yu-Hang Wang, Qi-Qi Li, Ji-Ke Tan
Summary: This paper presents experimental and numerical studies on the shear behavior of a double-corrugated steel plate in a novel prefabricated double-corrugated steel plate shear wall. The results show that the double-corrugated steel plate has better out-of-plane stability and shear resistance compared to a flat steel plate. The corrugation height affects the failure mode, ultimate shear resistance and ductility of the plate. Reliable bolt connection is important for sustaining the stiffness and shear resistance of the plate.
THIN-WALLED STRUCTURES
(2022)
Article
Engineering, Electrical & Electronic
Subhash Kak
Summary: In many natural and engineered systems, circles and spirals are important and need to be analyzed for their fractal dimension. The traditional box-counting method is not suitable for circles and spheres, so we propose using the number of circles or spheres in the mapping process to compute the dimension. This approach is demonstrated with examples and its application to repeating spiral patterns across scales is discussed.
CIRCUITS SYSTEMS AND SIGNAL PROCESSING
(2023)
Article
Nanoscience & Nanotechnology
Ivan S. Vorotiahin, Anna N. Morozovska, Eugene A. Eliseev, Yuri A. Genenko
Summary: The influences of misfit strain, surface screening charges, and flexoelectric effect on a rhombohedral lead zirconate titanate ferroelectric/ferroelastic thin film have been studied, with findings showing that the magnitude and sign of misfit strain affect domain structure and surface screening charges determine the presence of closure domain structures. The flexoelectric effect plays a significant role in topologically nontrivial structures.
ADVANCED ELECTRONIC MATERIALS
(2022)
Article
Multidisciplinary Sciences
Seunghun Kang, Woo Sung Jang, Anna N. Morozovska, Owoong Kwon, Yeongrok Jin, Young-Noon Kim, Hagyoul Bae, Chenxi Wane, Sang-Hyeok Yang, Alex Belianinov, Steven Randolph, Eugene A. Eliseev, Liam Collins, Yeehyun Park, Sanghyun Jo, Min-Hyoung Jung, Kyoung-June Go, Hae Won Cho, Si-Young Choi, Jae Hyuck Jang, Sunkook Kim, Hu Young Jeon, Jaekwang Lee, Olga S. Ovchinnikova, Jinseong Heo, Sergei Kalinin, Young-Min Kim, Yunseok Kim
Summary: This research reveals the origins and pathways to control ferroelectricity in hafnium oxide (HfO2)-based materials through local helium (He) implantation. It opens up possibilities for developing nanoengineered binary ferroelectrics.
Article
Physics, Applied
Anna N. Morozovska, Eugene A. Eliseev, Kyle Kelley, Sergei V. Kalinin
Summary: The combination of local heating and biasing in temperature-assisted piezosponse force microscopy (TPFM) provides a pathway for probing temperature-induced phase transitions and polarization dynamics in ferroic materials. The study analyzes the signal formation mechanism in TPFM and investigates the interplay between thermal and bias-induced switching. The research results are significant for the quantitative interpretation of TPFM observations and the exploration of thermopolarization effects in various materials.
PHYSICAL REVIEW APPLIED
(2022)
Article
Physics, Applied
Anna N. Morozovska, Hanna Shevliakova, Yaroslava Yu Lopatina, Mykola E. Yelisieiev, Galina Dovbeshko, Marina Olenchuk, George S. Svechnikov, Sergei Kalinin, Yunseok Kim, Eugene A. Eliseev
Summary: This article proposes a flexible method to reconstruct the local density of states (LDOS) of low-dimensional transition-metal dichalcogenides (LDTMD) by measuring the local current-voltage characteristics. The reconstruction of LDOS allows for a better understanding of the local band structure of LDTMDs in a relatively wide energy range.
PHYSICAL REVIEW APPLIED
(2022)
Article
Materials Science, Multidisciplinary
Anna N. Morozovska, Sergei V. Kalinin, Mykola E. Yelisieiev, Jonghee Yang, Mahshid Ahmadi, Eugene A. Eliseev, Dean R. Evans
Summary: This research explores the polar states of uniaxial ferroelectric nanoparticles interacting with the surface system of electronic and ionic charges, taking into account the broad distribution of mobilities. The results show that nonlinear interactions between the ferroelectric dipoles and surface charges give rise to a wide range of paraelectric-like, antiferroelectric-like ionic, and ferroelectric-like ferroionic states. The transition between these states can be controlled by the static characteristics and relaxation dynamics of the surface charges. The obtained results are not only promising for advanced applications of ferroelectric nanoparticles in nanoelectronics and optoelectronics but also provide strategies for experimental verification.
Article
Materials Science, Multidisciplinary
Anna N. Morozovska, Eugene A. Eliseev, Yulian M. Vysochanskii, Viktoria V. Khist, Dean R. Evans
Summary: Using the Landau-Ginzburg-Devonshire approach, the study investigates screening-induced phase transitions in core-shell ferroic nanoparticles of three different shapes: an oblate disk, a sphere, and a prolate needle. The results demonstrate that the screening length of the shell has a critical influence on the phase transitions and spontaneous polarization of the nanoparticle core. The tunable screening shell allows the control of the polar state and phase diagrams, which can be of great significance for nonvolatile memory cells.
PHYSICAL REVIEW MATERIALS
(2022)
Article
Physics, Applied
Anna N. Morozovska, Eugene A. Eliseev, Mykola E. Yelisieiev, Yulian M. Vysochanskii, Dean R. Evans
Summary: Using the Landau-Ginzburg-Devonshire approach, the stress-induced transformations of polarization switching in CuInP2S6 nanoparticles of different shapes were studied. The semiconducting properties of the nanoparticles were modeled using a surface-charge layer with a small effective screening length due to the field effect. The results showed a strong and unusual influence of hydrostatic pressure on polarization switching, hysteresis loop shape, magnitude of remanent polarization, and coercive fields.
PHYSICAL REVIEW APPLIED
(2023)
Article
Chemistry, Multidisciplinary
Yongtao Liu, Anna N. Morozovska, Ayana Ghosh, Kyle P. Kelley, Eugene A. Eliseev, Jinyuan Yao, Ying Liu, Sergei Kalinin
Summary: In this study, the local curvature and strain effects on polarization in CIPS were investigated using piezoresponse force microscopy and spectroscopy. The finite element Landau-Ginzburg-Devonshire model was introduced to explain the observed behaviors and decouple the curvature and strain effects in 2D CIPS. The results showed that bending induced ferrielectric domains in CIPS and the polarization-voltage hysteresis loops differed in bending and nonbending regions. These studies provide important insights into the fabrication of curvature-engineered nanoelectronic devices.
Article
Chemistry, Physical
Kyle P. Kelley, Anna N. Morozovska, Eugene A. Eliseev, Yongtao Liu, Shelby S. Fields, Samantha T. Jaszewski, Takanori Mimura, Sebastian Calderon, Elizabeth C. Dickey, Jon F. Ihlefeld, Sergei V. Kalinin
Summary: Ferroelectricity in binary oxides such as hafnia and zirconia has attracted attention due to unconventional physical mechanisms and potential integration into semiconductor workflows. Recent research suggests that factors such as electrochemical boundary conditions and strain heavily influence the ferroelectric properties. The interplay between ferroelectric and structural instabilities, coupled with non-local screening, explains the emergence of these properties.
Article
Physics, Applied
Anna N. Morozovska, Maksym V. Strikha, Kyle P. Kelley, Sergei V. Kalinin, Eugene A. Eliseev
Summary: This study develops an effective model to describe the charge-polarization coupling behavior between a thin film and graphene, and explains the nonlinear relationship between Landau expansion coefficients and film thickness and chemical composition. The research finds that the polarization of the film strongly influences the conductivity of graphene, and the charge distribution in graphene can be controlled by manipulating the film's electric field dependence.
PHYSICAL REVIEW APPLIED
(2023)
Article
Materials Science, Multidisciplinary
Anna N. Morozovska, Eugene A. Eliseev, Venkatraman Gopalan, Long-Qing Chen
Summary: We propose an analytical Landau-Ginzburg (LG) theory that describes the charge density waves coupled with lattice and electronic long-range order parameters. The theory is applicable to various long-range order phenomena, such as superconducting Cooper pairs, structural distortions, electric polarization, and magnetization. We introduce a biquadratic coupling between the charge density gradient and the long-range order parameters, which plays a critical role in the appearance of spatially modulated phases in charge-ordered ferroics and high-temperature superconductors.
Article
Materials Science, Multidisciplinary
Anna N. Morozovska, Eugene A. Eliseev, Ayana Ghosh, Mykola E. Yelisieiev, Yulian M. Vysochanskii, Sergei V. Kalinin
Summary: In this study, the strain-induced polarization reversal in a ferroelectric CuInP2S6 (CIPS) thin film with conductive electrodes is explored. The study reveals an unusually strong effect of mismatch strain on the out-of-plane polarization reversal, hysteresis loop shape, dielectric susceptibility, and piezoelectric response of CIPS films.
Article
Physics, Condensed Matter
E. A. Eliseev, M. D. Glinchuk, L. P. Yurchenko, P. Maksymovych, A. N. Morozovska
Summary: In this study, the features of phase transitions in ferroelectric domain walls are theoretically investigated. The findings suggest that these features can be detected using scanning probe capacitance microwave microscopy.
CONDENSED MATTER PHYSICS
(2022)
Article
Materials Science, Multidisciplinary
Anna N. Morozovska, Eugene A. Eliseev, Salia Cherifi-Hertel, Dean R. Evans, Riccardo Hertel
Summary: The study explores the possibility of controlling the polarity and morphology of equilibrium domain structures in nanosized ferroelectric cores covered with ultrathin shell of screening charge through an external electric field, which can induce changes to the labyrinth structure by controlling the maze polarity.
Article
Engineering, Electrical & Electronic
Pankaj Sharma, Anna N. Morozovska, Eugene A. Eliseev, Qi Zhang, Daniel Sando, Nagarajan Valanoor, Jan Seidel
Summary: The small size of ferroelectric domain walls presents challenges in determining their electrical properties accurately. This study proposes a scanning-probe-based method to directly determine the specific conductivity of a single ferroelectric domain wall in an insulating material. By using transmission line spectroscopy measurements and mean-field theory, quantitative insights into the conductivity of ferroelectric domain walls are obtained.
ACS APPLIED ELECTRONIC MATERIALS
(2022)