Article
Meteorology & Atmospheric Sciences
Qianqian Huang, Yiqi Chu, Qianhui Li
Summary: Low-level temperature inversions are prevalent in Eastern China, with thick strong surface-based inversions dominating the northern part and thin weak elevated inversions dominating the southern part. Seasonal variations affect the intensity and frequency of inversions, with the strongest and most frequent inversions occurring in winter and the weakest in summer.
THEORETICAL AND APPLIED CLIMATOLOGY
(2021)
Article
Physics, Applied
Madhumitha Ravichandran, Guanyu Su, Chi Wang, Jee Hyun Seong, Artyom Kossolapov, Bren Phillips, Md Mahamudur Rahman, Matteo Bucci
Summary: A neural network model was developed to predict the departure from nucleate boiling ratio (DNBR) using high-resolution infrared measurements of bubble dynamics on different surfaces. The importance of fundamental boiling parameters such as nucleation site density, bubble departure frequency, growth time, and footprint radius in predicting the boiling crisis was elucidated. The study concluded that these parameters are equally necessary and important, undermining the general validity of models attempting to predict critical heat flux based on single boiling parameters.
APPLIED PHYSICS LETTERS
(2021)
Article
Energy & Fuels
Mohamed A. S. Zaghloul, Jerry H. Mason, Mohan Wang, Michael Buric, Zhaoqiang Peng, Shiwoo Lee, Paul Ohodnicki, Harry Abernathy, Kevin Peng Chen
Summary: Temperature gradients in SOFCs, resulting from local electrochemical reactions and gas flow channel geometry, lead to thermal stresses and property evolution, contributing to degradation. This study introduces a new method using high spatial resolution temperature measurements to monitor SOFC operation. Results showed the impact of H2 fuel concentrations and current loads on temperature profiles, providing experimental support for model-based design optimization.
Article
Thermodynamics
S. Jimenez
Summary: The article highlights the importance of heat conduction along the fine wires of a thermocouple, even if its junction presents a bead-like shape. The study shows that commercial beads do not generate any temperature gradient and the temperature in the junction is dominated by heat conduction from/to the adjacent wires. It suggests using a correlation for convection to a cylinder and provides a criterion for neglecting heat conduction errors in thermocouple measurements.
COMBUSTION AND FLAME
(2022)
Article
Engineering, Multidisciplinary
Y. Jiao, C. F. Liu, X. P. Cui, J. Zhang, L. J. Huang, L. Geng
Summary: The manuscript discusses the application of a simultaneous thermal analyzer (STA449F3) in low-temperature differential scanning calorimetry (DSC) and specific heat capacity tests. Some issues were identified during the specific heat capacity measurement. By creating a non-liquid nitrogen cooling environment, the researchers were able to significantly reduce the error between the tested and reference values.
Article
Optics
A. Coscetta, E. Catalano, E. Cerri, N. Cennamo, L. Zeni, A. Minardo
Summary: The study introduces a hybrid Brillouin/Rayleigh sensor for multiparameter sensing in optical fibers. By utilizing a single laser pulse to excite both Rayleigh and Brillouin backscattering in the same fiber, the system is capable of simultaneously determining the Brillouin frequency shift (BFS) of the fiber and the frequency contents of any vibration acting on the same fiber.
Article
Geochemistry & Geophysics
Sylvain Piqueux, Tuan H. Vu, Jonathan Bapst, Laurence A. J. Garvie, Mathieu Choukroun, Christopher S. Edwards
Summary: Specific heat capacity Cp(T) is an important factor controlling planetary surface temperatures, often assumed as a fixed value or derived from lunar basalts. Results suggest that the basaltic assumption for Cp(T) is generally adequate for simulating a wide range of planetary surface temperatures, but may be inadequate for analyzing subtle trends.
JOURNAL OF GEOPHYSICAL RESEARCH-PLANETS
(2021)
Article
Thermodynamics
Refat Razouk, Olivier Beaumont, Jacques Hameury, Bruno Hay
Summary: The French National Metrology Institute LNE-LCM modified a high temperature Laser Flash apparatus for measuring the specific heat of solids through drop calorimetry. The apparatus includes an inductive furnace, heat-flux Calvet calorimeter, and in-situ electrical calibration system for accurate and reliable measurements traceable to the International System of Units (SI). The calibration and measurement procedure enables the determination of enthalpy increments of solids up to 2700 degrees C, with results showing good agreement with literature values and a relative uncertainty of 5%.
THERMAL SCIENCE AND ENGINEERING PROGRESS
(2021)
Article
Engineering, Environmental
Yongshuai Xie, Lin Wang, Ying Peng, Dehua Ma, Luyi Zhu, Guanghui Zhang, Xinqiang Wang
Summary: The research team has developed a novel material with excellent thermal stability and flexibility, making it suitable for high-temperature environments with various stringent requirements. This material's unique structure, low density, high porosity, and outstanding thermal insulation performance set it apart from conventional materials.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Environmental Sciences
Christian Merkenschlager, Elke Hertig, Jonathan Simon, Christoph Beck
Summary: High-resolution assessments were conducted in Augsburg, Southern Germany, to study heat events using the method of absolute and relative temperature thresholds. The study focused on analyzing the potential changes in event number and duration under future climate conditions, as well as the impact of green spaces and sealed areas on intra-urban heat events.
Article
Geosciences, Multidisciplinary
Tian Tian, Lijing Cheng, Gongjie Wang, John Abraham, Wangxu Wei, Shihe Ren, Jiang Zhu, Junqiang Song, Hongze Leng
Summary: This study successfully reconstructed a high-resolution global ocean subsurface salinity dataset for the period 1993-2018 using a feed-forward neural network approach, which effectively transferred small-scale spatial variations in different fields into the salinity field. The machine learning approach showed efficiency in bringing satellite observations together with in situ observations, providing an alternative method for ocean and climate data reconstruction.
EARTH SYSTEM SCIENCE DATA
(2022)
Article
Chemistry, Analytical
Marcus Maier, Cedric Kechavarzi, Xiaomin Xu, Janet M. Lees
Summary: Fibre optic sensors can measure temperature or strain in concrete structures in real time. However, it is difficult to separate the influences of different factors when the measured frequency shift is a response to a combination of mechanical, thermal or hygral loadings. Importance rating: 8/10
Article
Chemistry, Physical
Xuwen Luo, Haidong Wang
Summary: This study presents a temperature sensor with excellent temporal-spatial resolution that can measure both in-plane and out-of-plane heat flow. The sensor, made of thin platinum nano-film and an aluminum nitride ceramic sheet, was calibrated and estimated to have a temperature accuracy of 0.01 K. Experimental results demonstrate the sensor's good sensitivity and accuracy in high-temperature environments.
Article
Engineering, Multidisciplinary
Marvin Schewe, Dhyan Kohlmann, Hendrik Wulfmeier, Holger Fritze, Christian Rembe
Summary: Environmental disturbances limit laser Doppler vibration measurements. This paper demonstrates how to compensate for these disturbances and achieve high-resolution displacement measurements in high-temperature environments.
Article
Geosciences, Multidisciplinary
Hui Zhang, Ming Luo, Yongquan Zhao, Lijie Lin, Erjia Ge, Yuanjian Yang, Guicai Ning, Jing Cong, Zhaoliang Zeng, Ke Gui, Jing Li, Ting On Chan, Xiang Li, Sijia Wu, Peng Wang, Xiaoyu Wang
Summary: This study generated the first high spatial resolution (1 km) dataset of monthly human thermal indices over China during 2003-2020. The dataset includes 12 commonly used thermal indices, with desirable accuracies and high agreements with observations. The study also revealed increasing trends of thermal indices in most parts of China during the study period, especially in North China, Southwest China, the Tibetan Plateau, and parts of Northwest China in spring and summer.
EARTH SYSTEM SCIENCE DATA
(2023)
Article
Chemistry, Inorganic & Nuclear
Girma Hailu Gebresenbut, Lars Eriksson, Ulrich Haussermann, Andreas Rydh, Roland Mathieu, Olga Yu Vekilova, Takayuki Shiino
Summary: Investigations of reaction mixtures REx(Au0.79Si0.21)100-x yielded a new GdAu3Si structure type, which exhibits both superconductivity and complex magnetic ordering. The structure consists of ordered Au and Si atoms forming a Si-centered framework. The physical properties of the compounds were explored experimentally and compared with theoretical predictions.
INORGANIC CHEMISTRY
(2022)
Article
Physics, Condensed Matter
P. G. LaBarre, A. Rydh, J. Palmer-Fortune, J. A. Frothingham, S. T. Hannahs, A. P. Ramirez, N. A. Fortune
Summary: This article reports the first observation of magnetoquantum oscillations (MQOs) in the low-temperature specific heat of the topological Kondo insulator SmB6. The findings suggest that these MQOs are likely an intrinsic effect rather than an extrinsic effect.
JOURNAL OF PHYSICS-CONDENSED MATTER
(2022)
Article
Multidisciplinary Sciences
Taras Golod, Vladimir M. Krasnov
Summary: The authors demonstrate prototypes of superconducting diodes operational at zero magnetic field, which exhibit a large and switchable nonreciprocity. By altering the bias configuration and trapping/removing a vortex, the diode's polarity and nonreciprocity can be easily changed, offering a memory functionality. This research holds potential for future in-memory superconducting computers.
NATURE COMMUNICATIONS
(2022)
Article
Multidisciplinary Sciences
D. C. Joshi, G. H. Gebresenbut, A. Fischer, A. Rydh, U. Haussermann, P. Nordblad, R. Mathieu
Summary: The exploration of the Gd-Au-Al system led to the discovery of the intermetallic compound GdAu6.75-xAl0.5+x, which exhibits a previously unknown structure and magnetic properties.
SCIENTIFIC REPORTS
(2022)
Article
Physics, Applied
S. Yu Grebenchuk, R. Cattaneo, V. M. Krasnov
Summary: In this study, we investigate arrays of planar Nb Josephson junctions with contacts to intermediate electrodes. Our findings demonstrate the complexity of array dynamics and reveal a strong interjunction interaction. The results show that planar geometry offers significant advantages for coherent Josephson electronics.
PHYSICAL REVIEW APPLIED
(2022)
Article
Materials Science, Multidisciplinary
V. K. Vlasko-Vlasov, A. Rydh, R. Divan, D. Rosenmann, A. Glatz, W. -k. Kwok
Summary: We observed tailored vortex motion in a niobium film placed on periodic arrays of T and I-shaped permalloy elements under different in-plane polarizations. The vortex can easily penetrate the patterned area, showing enhanced vortex pinning and meandering motion. This behavior can be explained by magnetostatic interactions between the polarized TI elements and induced vortices.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2022)
Article
Education & Educational Research
Vladimir M. Krasnov
Summary: Scientists today lack time to read all publications, so scientific articles need to be properly adjusted and answer why, what, and so what questions.
EDUCATION RESEARCH INTERNATIONAL
(2022)
Article
Nanoscience & Nanotechnology
Mikhail A. Galin, Vladimir M. Krasnov, Ilya A. Shereshevsky, Nadezhda K. Vdovicheva, Vladislav V. Kurin
Summary: This study experimentally and theoretically investigates the mutual phase locking and electromagnetic interaction between two linear arrays with a large number of Josephson junctions. The results show that there is a significant coherent gain, up to a factor of three, in the emitted power from two simultaneously biased arrays compared to the sum of powers from two individually biased arrays. The gain is attributed to the phase locking of junctions in different arrays through a common electromagnetic field. Additionally, the mutual interaction between large arrays leads to improved synchronization of junctions inside each array, resulting in even larger gain.
BEILSTEIN JOURNAL OF NANOTECHNOLOGY
(2022)
Article
Nanoscience & Nanotechnology
Roger Cattaneo, Mikhail A. Galin, Vladimir M. Krasnov
Summary: This study presents an experimental investigation on large arrays of Josephson junctions as sources of microwave radiation. The arrays exhibit cavity mode resonances and resonant steps in the current-voltage characteristics. The emission of electromagnetic waves is facilitated by cavity modes and the standing wave order imprints on the array, enabling phase-locking of the junctions. The study provides insights into a coupling mechanism for long-range phase-locking of large junction arrays.
BEILSTEIN JOURNAL OF NANOTECHNOLOGY
(2022)
Article
Nanoscience & Nanotechnology
Vladimir M. Krasnov
Summary: Optimization of Josephson oscillators requires a quantitative understanding of their microwave properties. In this work, a distributed, active patch antenna model of a Josephson oscillator is presented, taking into account the internal Josephson electrodynamics. The model provides full characterization of Josephson oscillators and explains the origin of the low radiative power efficiency. An optimized Josephson patch oscillator capable of reaching high efficiency and radiation power for emission into free space is discussed.
BEILSTEIN JOURNAL OF NANOTECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
A. Khansili, A. Bangura, R. D. McDonald, B. J. Ramshaw, A. Rydh, A. Shekhter
Summary: The quasiparticle density of states in correlated and quantum-critical metals can be directly measured using nuclear spin-lattice relaxation rate. In this study, nonresonant access to spin-lattice relaxation dynamics was achieved through AC-calorimetric measurements. The nuclear spin-lattice relaxation rate was inferred from its effect on the frequency dispersion of the thermal response.
Article
Materials Science, Multidisciplinary
Takayuki Shiino, Girma Hailu Gebresenbut, Cesar Pay Gomez, Ulrich Haussermann, Per Nordblad, Andreas Rydh, Roland Mathieu
Summary: In this study, we investigated the critical behavior and magnetocaloric effects of the Gd-Au-Si (GAS) ferromagnetic qua-sicrystal approximants, Gd13.7Au72.7Si13.6 (referred to as GAS(0)) and Gd15.4Au68.6Si16.0 (GAS(100)). The GAS(0) is a conventional Tsai-type 1/1 approximant crystal, while the GAS(100) has a slightly different atomic decoration from the Tsai type (thus referred to as pseudo-Tsai type). The critical exponents of both systems are close to those predicted by mean-field theory. The specific heat of both GAS systems shows interesting magnetic-field dependence, resulting in a magnetocaloric effect characterized by adiabatic cooling (heating) over a broad temperature range below approximately 30 K.
Article
Materials Science, Multidisciplinary
Girma Hailu Gebresenbut, Takayuki Shiino, Mikael Svante Andersson, Navid Qureshi, Oscar Fabelo, Premysl Beran, Daniel Qvarngard, Patrik Henelius, Andreas Rydh, Roland Mathieu, Per Nordblad, Cesar Pay Gomez
Summary: In this study, the effect of incorporating pseudo-Tsai clusters on the magnetic structures of two approximants, TAS(0) and HAS(52), was investigated. The arrangement of ordered magnetic spins in the icosahedral shells was found to be similar in both phases, while the cluster-center magnetic states were different. The magnetic moments of the cluster-center Tb were found to affect the arrangement of surrounding icosahedral magnetic moments, while the icosahedral R magnetic moments were less affected. These findings have important implications for understanding the magnetic ordering effect in cluster-based quasicrystals.
Article
Materials Science, Multidisciplinary
Razmik A. Hovhannisyan, Taras Golod, Vladimir M. Krasnov
Summary: This study presents a proof of concept for a super-resolution magnetic imaging method using a Josephson junction (JJ), which is based on solving the inverse problem of reconstructing the local magnetic field distribution within the junction. The method resembles Fourier-transform holography and achieves high field sensitivity and high spatial resolution without the trade-off problem of magnetic sensors.
Article
Materials Science, Multidisciplinary
R. Chapai, A. Rydh, M. P. Smylie, D. Y. Chung, H. Zheng, A. E. Koshelev, J. E. Pearson, W. -K. Kwok, J. F. Mitchell, U. Welp
Summary: The synthesis and characterization of Ta3Sb, a material predicted to have topological surface states and eightfold degenerate fermionic states, are reported. The material exhibits unique properties in superconductivity and magnetic fields.