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Thematische Bibliographien / Partial phase change / Zeitschriftenartikel

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Zeitschriftenartikel zum Thema „Partial phase change“

Autor: Grafiati

Veröffentlicht am 28. Juni 2021

Zuletzt aktualisiert am 29. Juli 2025

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1

Zálešák, Martin, Patrik Bouchal, Milan Ostrý, and Jiří Hejčík. "Experimental set up for the investigation of partial phase changes of phase change materials." EPJ Web of Conferences 264 (2022): 01049. http://dx.doi.org/10.1051/epjconf/202226401049.

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Thermal energy storage with phase change materials (PCMs) has attracted a lot of attention in the last several decades. Most PCMs do not change phase at a constant temperature but rather in a certain temperature range. It means that the PCM need to transit through its phase change temperature range to fully change phase from the solid state to the liquid state and vice-versa. The situation, in which the phase transition begins and/or ends within the phase change temperature range (in the mushy zone), is usually called a partial phase transition (or a partial phase change). The partial phase tr

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Gamisch, Sebastian, and Stefan Gschwander. "Modeling of phase change hysteresis during partial phase change with the “shift”-method." Journal of Physics: Conference Series 2766, no. 1 (2024): 012231. http://dx.doi.org/10.1088/1742-6596/2766/1/012231.

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Abstract For phase change materials (PCM) a difference between melting and crystallization temperature can occur, the so-called supercooling. For numerical modelling of this hysteresis effect, phenomenological approaches based on the experimentally determined enthalpy-temperature relations for melting and crystallization can be applied. It is challenging to model the behavior for partial phase transitions. The study presents a new phenomenological method, called the “shift”-method. It is derived especially but not only for PCMs with a multistage phase change during crystallization, like it can

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Zastawna-Rumin, Anna, Tomasz Kisilewicz, and Umberto Berardi. "Novel Simulation Algorithm for Modeling the Hysteresis of Phase Change Materials." Energies 13, no. 5 (2020): 1200. http://dx.doi.org/10.3390/en13051200.

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Latent heat thermal energy storage (LHTES) using phase change materials (PCM) is one of the most promising ways for thermal energy storage (TES), especially in lightweight buildings. However, accurate control of the phase transition of PCM is not easy to predict. For example, neglecting the hysteresis or the effect of the speed of phase change processes reduces the accuracy of simulations of TES. In this paper, the authors propose a new software module for EnergyPlus™ that aims to simulate the hysteresis of PCMs during the phase change. The new module is tested by comparing simulation results

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Braga, Stefania, Alessandro Sanasi, Alessandro Cabrini, and Guido Torelli. "Voltage-Driven Partial-RESET Multilevel Programming in Phase-Change Memories." IEEE Transactions on Electron Devices 57, no. 10 (2010): 2556–63. http://dx.doi.org/10.1109/ted.2010.2062185.

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5

GOUN, A. A., and B. YA ZEL'DOVICH. "CHANGE OF PARTIAL POLARIZATION OF A BEAM UNDER PHASE CONJUGATION." Journal of Nonlinear Optical Physics & Materials 10, no. 03 (2001): 371–75. http://dx.doi.org/10.1142/s0218863501000711.

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Possible change of the polarization state in the process of propagation is considered theoretically. We were able to suggest a mechanism that allows for a very unusual behavior of the Stokes parameters of the beam. Specially arranged phase conjugation procedure yields the decrease of only one (e.g. ∣ζ3∣∝∣(∣Ex∣2 - ∣Ey∣2)∣) Stokes component, while the degrees of 45%- and circular polarization, ζ1 and ζ2, are not changing at all.

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Su, Yifang, Yihang Zhang, Kaifeng Lin, et al. "Numerical Study on Resistance Change Characteristics of Phase Change Materials." Advances in Materials Science and Engineering 2021 (July 6, 2021): 1–12. http://dx.doi.org/10.1155/2021/7934173.

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Phase change materials are a type of emerging materials whose states will change under certain conditions, which then lead to changes in resistance. To study the characteristics of the phase change materials, a numerical simulation model of the resistive change unit based on the finite element method and the classic nucleation/growth theory is established, while the partial differential equations of electricity and heat conduction and the discrete formula of the finite element are also derived. According to the phase transition process of phase change materials, a crystalline-amorphous simulat

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Stern, Keren, Nicolas Wainstein, Yair Keller, et al. "Sub-Nanosecond Pulses Enable Partial Reset for Analog Phase Change Memory." IEEE Electron Device Letters 42, no. 9 (2021): 1291–94. http://dx.doi.org/10.1109/led.2021.3094765.

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Braga, Stefania, Alessandro Cabrini, and Guido Torelli. "Experimental Analysis of Partial-SET State Stability in Phase-Change Memories." IEEE Transactions on Electron Devices 58, no. 2 (2011): 517–22. http://dx.doi.org/10.1109/ted.2010.2090157.

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Braga, Stefania, Alessandro Cabrini, and Guido Torelli. "Transient effects in partial-RESET programming of phase-change memory cells." Solid-State Electronics 65-66 (November 2011): 250–55. http://dx.doi.org/10.1016/j.sse.2011.06.026.

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Pineda-Sanchez, Manuel, Ruben Puche-Panadero, Javier Martinez-Roman, Angel Sapena-Bano, Martin Riera-Guasp, and Juan Perez-Cruz. "Partial Inductance Model of Induction Machines for Fault Diagnosis." Sensors 18, no. 7 (2018): 2340. http://dx.doi.org/10.3390/s18072340.

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The development of advanced fault diagnostic systems for induction machines through the stator current requires accurate and fast models that can simulate the machine under faulty conditions, both in steady-state and in transient regime. These models are far more complex than the models used for healthy machines, because one of the effect of the faults is to change the winding configurations (broken bar faults, rotor asymmetries, and inter-turn short circuits) or the magnetic circuit (eccentricity and bearing faults). This produces a change of the self and mutual phase inductances, which induc

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Perlis, Michael, Knashawn Morales, Ivan Vargas, et al. "368 Durability of Tx Response to Zolpidem using a Partial Reinforcement Regimen: Does this strategy require contingent reinforcement?" Sleep 44, Supplement_2 (2021): A146—A147. http://dx.doi.org/10.1093/sleep/zsab072.367.

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Abstract Introduction In 2015, partial reinforcement (PR) was assessed as an alternative approach to maintenance therapy with zolpidem. The method being: once a treatment response is obtained over the course of 1-month’s Tx with QHS dosing (Phase-1), Tx response can maintained over time with a PR regimen (Phase-2 [nightly pill/capsule use with 50% of capsules having medication and 50% having only inert filler]). In that study, it was assumed that Phase1 QHS dosing was required 1) to maximize treatment responding and 2) for the conditioning of pharmacologic responses to the medication vehicle (

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Li, Yang, Yaochen Qin, Liqun Ma, and Ziwu Pan. "Climate change: vegetation and phenological phase dynamics." International Journal of Climate Change Strategies and Management 12, no. 4 (2020): 495–509. http://dx.doi.org/10.1108/ijccsm-06-2019-0037.

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Purpose The ecological environment of the Loess Plateau, China, is extremely fragile under the context of global warming. Over the past two decades, the vegetation of the Loess Plateau has undergone great changes. This paper aims to clarify the response mechanisms of vegetation to climate change, to provide support for the restoration and environmental treatment of vegetation on the Loess Plateau. Design/methodology/approach The Savitsky–Golay (S-G) filtering algorithm was used to reconstruct time series of moderate resolution imaging spectroradiometer (MODIS) 13A2 data. Combined with trend an

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Shi, L. P., T. C. Chong, P. K. Tan, X. S. Miao, Y. M. Huang, and R. Zhao. "Study of the Partial Crystallization Properties of Phase-Change Optical Recording Disks." Japanese Journal of Applied Physics 38, Part 1, No. 3B (1999): 1645–48. http://dx.doi.org/10.1143/jjap.38.1645.

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Peng, Chubing, and Masud Mansuripur. "Partial-response signaling for phase-change optical data storage without electronic equalization." Applied Optics 41, no. 17 (2002): 3479. http://dx.doi.org/10.1364/ao.41.003479.

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Yang, Lexin, Dianwei He, Chen Hu, et al. "High-Temperature Fatigue Degradation Behaviors of a 3D Braided C/SiC with a Thin Interlayer in Different Dry Oxygen Atmospheres." Materials 17, no. 19 (2024): 4925. http://dx.doi.org/10.3390/ma17194925.

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In order to evaluate the increase in the flexural strength of a 3D braided C/SiC composite comprised with a thin pyrolytic carbon (PyC) interlayer (TI C/SiC) under a load of 60 MPa with an amplitude of ±20 MPa at an oxygen partial pressure of 8000 Pa, the effect of temperature, oxidation and stress value on the length change in the sample, fracture behavior, residual flexural strength and fracture morphology were studied up to 1500 °C. It was found that the gauge length change behaviors of the material are related to (i) the positive damage of the thin interlayer and (ii) to the negative damag

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Lagowa, Muhammad Ikrar, and Lucky Zaehir Maulana. "THE EFFECT OF MILLING ON PARTICLE SIZE AND CRYSTAL STRUCTURE IN MECHANOCHEMICAL PROCESSING OF LEAD-CONTAMINATED SYNTHETIC SOIL." JOURNAL ONLINE OF PHYSICS 10, no. 2 (2025): 134–39. https://doi.org/10.22437/jop.v10i2.43457.

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crystal structure, which can immobilize lead and mitigate environmental contamination. Milling as a mechanical treatment plays a critical role in determining the final properties of the processed material. This study investigates the role of particle size and crystal structure in the mechanochemical treatment of lead-contaminated synthetic soil. Two synthetic soil samples were prepared in the laboratory, including lead contamination. Milling of the contaminated soils was carried out in a planetary ball mill. The samples were analysed using a lasersizer and X-Ray Diffraction (XRD) to investigat

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Kumar, M. S. Vijaya, Kazuhiko Kuribayashi, and Koichi Kitazono. "Formation of LuFe2O4 phase from an undercooled LuFeO3 melt in reduced oxygen partial pressure." Journal of Materials Research 23, no. 11 (2008): 2996–3005. http://dx.doi.org/10.1557/jmr.2008.0359.

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The formation of metastable phases from an undercooled LuFeO3 melt was investigated under reduced Po2 since the iron ion has the tendency to change its valence state from Fe3+ to Fe2+ in an ambient atmosphere with low Po2. The nucleation and the post-recalescence temperatures of the phases were decreased with decreasing process Po2. Phase equilibrium was established in the Lu–Fe–O system at 1473 K by varying the oxygen partial pressure from 105 to 10−1 Pa. A possible ternary metastable phase diagram depending on the oxygen composition in the bulk sample was also constructed. The formation of t

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Guo, Shuang, Xiaolong Zhang, Bao Wang, Yunfeng Wang, and Zhigao Hu. "Dielectric functions evolution and electronic bandgap manipulation by silicon doping for Sb₂Te₃ phase change films: Temperature dependent spectroscopic ellipsometry study." Journal of Applied Physics 132, no. 20 (2022): 205109. http://dx.doi.org/10.1063/5.0121601.

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The dielectric function evolution and electronic bandgap manipulation by silicon (Si) doping for [Formula: see text] phase change films have been investigated by temperature dependent spectroscopic ellipsometry measurements. During the phase change from amorphous to rhombohedral structures, the significant contrast of electronic band structure for pure [Formula: see text] and Si-doped [Formula: see text] (SST) films as functions of temperature (210–620 K) and Si concentration (0%–12%) has been systematically studied by analyzing the dielectric functions, Tauc gap energy, and partial spectral w

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Peng, Chubing, and M. Mansuripur. "Evaluation of partial-response maximum-likelihood detection for phase-change optical data storage." Applied Optics 38, no. 20 (1999): 4394. http://dx.doi.org/10.1364/ao.38.004394.

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Li, Hongjun, C. K. Hsieh, and D. Y. Goswami. "Source and Sink Method of Solution of Two-Dimensional Phase Change for Energy Storage." Journal of Solar Energy Engineering 116, no. 2 (1994): 100–106. http://dx.doi.org/10.1115/1.2930496.

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A source and sink method has been developed for the solution of heat transfer with phase change in two dimensions. In this method, the heat transfer in one direction is decoupled from that in the other direction by changing the second partial differential in the direction where the phase change is less dominant to a finite difference form and solving the problem in the other direction with an analytical solution that accounts for the motion of the interface in a phase-change problem. The solution developed in this paper is thus independent of the equations used to represent the interface as we

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Ume, Rubab, Haibo Gong, Vadim Tokranov, et al. "Electrical and structural properties of binary Ga–Sb phase change memory alloys." Journal of Applied Physics 132, no. 3 (2022): 035103. http://dx.doi.org/10.1063/5.0096022.

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Material properties of Ga–Sb binary alloy thin films deposited under ultra-high vacuum conditions were studied for analog phase change memory (PCM) applications. Crystallization of this alloy was shown to occur in the temperature range of 180–264 °C, with activation energy >2.5 eV depending on the composition. X-ray diffraction (XRD) studies showed phase separation upon crystallization into two phases, Ga-doped A7 antimony and cubic zinc-blende GaSb. Synchrotron in situ XRD analysis revealed that crystallization into the A7 phase is accompanied by Ga out-diffusion from the grains. X-ray abs

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Niwa, Eiki, Tsubasa Sato та Takuya Hashimoto. "Thermodynamic analyses of the orthorhombic-to-tetragonal phase transition in Pr2−xNdxNiO4+δ under controlled oxygen partial pressures". Dalton Transactions 49, № 34 (2020): 11931–41. http://dx.doi.org/10.1039/d0dt02119a.

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The standard entropy change, ΔS°, and enthalpy change, ΔH°, at the structural phase transition of Pr<sub>2−x</sub>Nd<sub>x</sub>NiO<sub>4+δ</sub> and their impact on variation of phase transition temperature by Nd content.

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Ivanova, A. A. "Calculation of Phase-Change Boundary Position in Continuous Casting." Archives of Foundry Engineering 13, no. 4 (2013): 57–62. http://dx.doi.org/10.2478/afe-2013-0082.

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Abstract The problem of determination of the phase-change boundary position at the mathematical modeling of continuous ingot temperature field is considered. The description of the heat transfer process takes into account the dependence of the thermal physical characteristics on the temperature, so that the mathematical model is based on the nonlinear partial differential equations. The boundary position between liquid and solid phase is given by the temperatures equality condition and the Stefan condition for the two-dimensional case. The new method of calculation of the phase-change boundary

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Hsino, Mahmoud, and Jerzy Pasławski. "Phase Change Materials as a Modifier of Ageing Cement Concrete in Hot and Dry Climate." Advanced Materials Research 804 (September 2013): 129–34. http://dx.doi.org/10.4028/www.scientific.net/amr.804.129.

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This paper is devoted to the use of Phase Change Materials as a cement concrete modifier in Middle East climate. Due to large amplitude of daily air temperature in these conditions, Phase Change Materials can be used to reduce the dynamic of thermal peak in an ageing concrete. Partial results of studies to determine the influence of various factors on the effects of modifications are presented

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Liu, Aihua, Junjiang Lin, and Yijie Zhuang. "PIV experimental study on the phase change behavior of phase change material with partial filling of metal foam inside a cavity during melting." International Journal of Heat and Mass Transfer 187 (May 2022): 122567. http://dx.doi.org/10.1016/j.ijheatmasstransfer.2022.122567.

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Kong, Xianghao, Hezhi Sun, Shiri Liang, Zao Yi, Naiting Gu, and Yougen Yi. "Intelligent Space Thermal Control Radiator Based on Phase Change Material with Partial Visible Transparency." Coatings 14, no. 5 (2024): 535. http://dx.doi.org/10.3390/coatings14050535.

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Coating structures with dynamically adjustable infrared emissivity are crucial in spacecraft components to cope with the transient thermal environments of space. For a long time, thermochromic phase change materials have been widely used in applications requiring emissivity adjustment, and optimizing the range of adjustable infrared emissivity has always been at the forefront of research. However, reducing the absorption of solar radiation has significant implications for the practical application and thermal stability of spacecraft components in space environments. In this paper, we propose a

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Kamkari, Babak, and Hossein Shokouhmand. "Experimental investigation of phase change material melting in rectangular enclosures with horizontal partial fins." International Journal of Heat and Mass Transfer 78 (November 2014): 839–51. http://dx.doi.org/10.1016/j.ijheatmasstransfer.2014.07.056.

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Yu, Yiqi, and Marek Skowronski. "Growth dominated crystallization of GeTe mushroom cells during partial SET operation." Journal of Applied Physics 133, no. 4 (2023): 044501. http://dx.doi.org/10.1063/5.0129023.

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Phase change memory devices are a leading candidate for non-volatile memory arrays, as artificial synapses in neuromorphic circuits, and for in-memory computing. These applications are hampered by a large cycle-to-cycle variation of resistance that is likely associated with the crystallization mechanism of phase change materials. This work presents a direct observation by transmission electron microscopy of the crystallization process during the SET operation of the GeTe 100 nm mushroom cell. The process proceeded purely by growth from the periphery of the amorphous dome without nucleation. It

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Sega, Marcello, and György Hantal. "Phase and interface determination in computer simulations of liquid mixtures with high partial miscibility." Physical Chemistry Chemical Physics 19, no. 29 (2017): 18968–74. http://dx.doi.org/10.1039/c7cp02918g.

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Partially miscible solutions can represent a challenge from the computer simulation standpoint, especially if the mutual solubility of the components is so large that their concentrations do not change much from one phase to another. A density-based clustering approach with quasi-linear scaling is shown to provide consistent phase identification.

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Wu, Wei, Fan Jia, Richard Kinai, and Todd D. Little. "Optimal number and allocation of data collection points for linear spline growth curve modeling." International Journal of Behavioral Development 41, no. 4 (2016): 550–58. http://dx.doi.org/10.1177/0165025416644076.

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Spline growth modelling is a popular tool to model change processes with distinct phases and change points in longitudinal studies. Focusing on linear spline growth models with two phases and a fixed change point (the transition point from one phase to the other), we detail how to find optimal data collection designs that maximize the efficiency of detecting key parameters in the spline models, holding the total number of data points or sample size constant. We identify efficient designs for the cases where (a) the exact location of the change point is known (complete certainty), (b) only the

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BERMÚDEZ, A., R. MUÑOZ-SOLA, and F. PENA. "A nonlinear partial differential system arising in thermoelectricity." European Journal of Applied Mathematics 16, no. 6 (2005): 683–712. http://dx.doi.org/10.1017/s0956792505006212.

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In this paper we prove the existence of a solution for a system of nonlinear parabolic partial differential equations arising from thermoelectric modelling of metallurgical electrodes undergoing a phase change. The model consists of an electromagnetic problem for eddy current computation coupled with a Stefan problem for temperature. The proof uses a regularized problem obtained by truncating the source term in temperature equation. Passing to the limit requires fine a priori estimates leading to compactness.

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Bell, A. M. T., R. A. D. Pattrick, and D. J. Vaughan. "Structural evolution of aqueous mercury sulphide precipitates: energy-dispersive X-ray diffraction studies." Mineralogical Magazine 74, no. 1 (2010): 85–96. http://dx.doi.org/10.1180/minmag.2010.074.1.85.

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AbstractIn situ, high-temperature energy-dispersive X-ray powder diffraction (EDXRD) data have been collected on synthetic and a natural sample of mercury sulphide (HgS). These measurements were made between temperatures of 295 and 798 K. Synthetic samples of HgS were prepared by reaction between sulphide and mercury in aqueous solution. In a subsequently dried and aged synthetic HgS sample, heated in vacuo, there is a change from a poorly crystalline pseudocubic material into a well crystalline cubic material in the temperature region 583–623 K. At higher temperature (748 K), there is evidenc

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Ismail, Y. I. Widodo, and R. A. Rahman. "Charge Assessment for Nitrate-Based Salt as a Phase Change Material for a Medium-Temperature Latent Storage Tank." Latvian Journal of Physics and Technical Sciences 61, no. 1 (2024): 52–61. http://dx.doi.org/10.2478/lpts-2024-0006.

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Abstract The present study assesses the heat characteristic of the nitrate-salt mixture as a phase change material (PCM) for a medium-temperature latent storage system (LSS). Two binary and ternary mixtures are evaluated, which demonstrate different thermal behaviour. The highest melting and latent heat capacity is obtained by KNO3(0.4)/NaNO3(0.6) at 223.8 °C and 161.5 J/g. However, it has a higher supercooling degree with a partial phase transition between 217.6 °C and 251.5 °C, making it unfeasible for a medium-temperature LSS tank. The ternary mixture (TM) with NaNO2(0.4)/KNO2(0.53)/NaNO3(0

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Wang, Xiao-Fang, Pao-An Lin, Xue-miao Wen, Bing-Yuh Lu, Tian-Le Li, and Wei-Ling Zhu. "Phase transitions of Ge₁₂Sb₈₈ thin films on high- and low-thermal-conductivity substrates and their potential applications in storage." Journal of Physics D: Applied Physics 55, no. 15 (2022): 155302. http://dx.doi.org/10.1088/1361-6463/ac476a.

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Abstract This study examined the phase-change Ge12Sb88 films that are fabricated through radio-frequency reactive magnetron sputtering to substrates with varying thermal conductivity. The in situ resistance was measured, and x-ray diffraction was conducted to investigate the phase-change behavior of the films under adjustments to the heating and annealing temperature. Differences in the films’ band gaps were determined by a spectrometer. The results were as follows: (a) the initial resistance levels of the films on low-thermal-conductivity substrates were higher than those on high-thermal-cond

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Maffoni, Silvia, Silvia Brazzo, Rachele De Giuseppe, et al. "Lifestyle Changes and Body Mass Index during COVID-19 Pandemic Lockdown: An Italian Online-Survey." Nutrients 13, no. 4 (2021): 1117. http://dx.doi.org/10.3390/nu13041117.

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Background. COVID-19 pandemic has imposed a period of contingency measures, including total or partial lockdowns all over the world leading to several changes in lifestyle/eating behaviours. This retrospective cohort study aimed at investigating Italian adult population lifestyle changes during COVID-19 pandemic “Phase 1” lockdown (8 March–4 May 2020) and discriminate between positive and negative changes and BMI (body mass index) variations (ΔBMI). Methods. A multiple-choice web-form survey was used to collect retrospective data regarding lifestyle/eating behaviours during “Phase 1” in the It

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Smirnov, A. V., Yu A. Ovchenkova, A. E. Bogdanov, A. V. Morozkin, I. S. Tereshina, and S. A. Nikitin. "STRUCTURAL AND MAGNETIC TRANSITION IN MULTICOMPONENT R5X4 COMPOUNDS." Кристаллография 68, no. 3 (2023): 434–42. http://dx.doi.org/10.31857/s0023476123700145.

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The structure, magnetic, magnetothermal, and magnetoelastic properties of Gd5Si2-xGe2-xIn2x (x = 0–0.1) intermetallic compounds have been studied in the region of magnetostructural phase transitions. It is shown that introduction of indium creates the effect of negative pressure, leading to a change in the critical temperature of the magnetic phase transition in the monoclinic phase of the compounds studied and to partial separation of the magnetic and structural phase transitions in them.

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Tominaga, Mayu, Masahiro Tsujimoto, Ken Ebisawa, Teruaki Enoto, and Kimitake Hayasaki. "X-Ray Spectral Variations of Circinus X-1 Observed with NICER throughout an Entire Orbital Cycle." Astrophysical Journal 958, no. 1 (2023): 52. http://dx.doi.org/10.3847/1538-4357/ad0034.

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Abstract Circinus X-1 (Cir X-1) is a neutron star binary with an elliptical orbit of 16.6 days. The source is unique for its extreme youth, providing a key to understanding early binary evolution. However, its X-ray variability is too complex to reach a clear interpretation. We conducted the first high-cadence (every 4 hr, on average) observations covering one entire orbit using the NICER X-ray telescope. The X-ray flux behavior can be divided into stable, dip, and flaring phases. The X-ray spectra in all phases can be described by a common model consisting of a partially covered disk blackbod

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Guo, Y. C., H. K. Liu, and S. X. Dou. "Phase evolution in silver-doped BiPbSrCaCuO(2223)/Ag superconducting composites." Journal of Materials Research 8, no. 9 (1993): 2187–90. http://dx.doi.org/10.1557/jmr.1993.2187.

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Silver doping into (Bi, Pb)2Sr2Ca2Cu3O10 superconducting composite tapes was found to accelerate the formation process of high-Tc (2223) phase owing to lowering the partial melting point of the samples. The differential thermal analysis (DTA) results showed that the partial melting temperature of the sample was lowered by about 10 °C from 850 °C to 840 °C by silver doping. However, with sufficient sintering both the silver-doped and undoped samples can reach a very high level of high-Tc phase fraction, suggesting that the silver doping only speeds up the rate of high-Tc phase formation, but do

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Sokolovskiy, V. V., V. D. Buchelnikov, and D. Cong. "MAGNETIC AND STRUCTURAL PROPERTIES OF ALL-D METAL MN-NI-TI HEUSLER ALLOYS." Bulletin of the South Ural State University series "Mathematics. Mechanics. Physics" 16, no. 2 (2024): 78–85. http://dx.doi.org/10.14529/mmph240208.

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The paper presents a theoretical study of the effect of different atomic and magnetic orderings on the structural and magnetic properties of Mn2Ni1+xTi1-x alloys, which are composed entirely of transition metals. Using the density functional theory, we predict the structural ground states and magnetic reference states of compounds with x = 0, 0,25, 0,5, and 0,75 in both cubic austenite and tetragonal martensite phases. Partial substitution of Ti atoms with Ni leads to an increase in the energy barrier between structural phases, to a change from a layered atomic ordering to an alternating stagg

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Rahmalina, Dwi, Dwi Chandra Adhitya, Reza Abdu Rahman, and Ismail Ismail. "Improvement the performance of composite PCM paraffin-based incorporate with volcanic ash as heat storage for low-temperature application." EUREKA: Physics and Engineering, no. 1 (September 23, 2021): 53–61. https://doi.org/10.21303/2461-4262.2022.002055.

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Paraffin is well known thermal energy storage with the high latent heat of fusion. Unfortunately, low thermal conductivity and low melting temperature inhibit large-scale applications for lower temperature applications like solar water heaters and desalination. The addition of high thermal conductivity material can increase the thermal conductivity of paraffin and increase the melting temperature of paraffin. In this study, a new approach is taken by using volcanic sand as thermal conductivity enhancement material. The properties of the sand are examined. The chemical composition of the sand i

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Mehryan, S. A. M., Kaamran Raahemifar, Leila Sasani Gargari, et al. "Latent Heat Phase Change Heat Transfer of a Nanoliquid with Nano–Encapsulated Phase Change Materials in a Wavy-Wall Enclosure with an Active Rotating Cylinder." Sustainability 13, no. 5 (2021): 2590. http://dx.doi.org/10.3390/su13052590.

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A Nano-Encapsulated Phase-Change Material (NEPCM) suspension is made of nanoparticles containing a Phase Change Material in their core and dispersed in a fluid. These particles can contribute to thermal energy storage and heat transfer by their latent heat of phase change as moving with the host fluid. Thus, such novel nanoliquids are promising for applications in waste heat recovery and thermal energy storage systems. In the present research, the mixed convection of NEPCM suspensions was addressed in a wavy wall cavity containing a rotating solid cylinder. As the nanoparticles move with the l

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Mendis, Shanthi, U. Samarajeewa, and R. O. Thattil. "Coconut fat and serum lipoproteins: effects of partial replacement with unsaturated fats." British Journal of Nutrition 85, no. 5 (2001): 583–89. http://dx.doi.org/10.1079/bjn2001331.

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The aim of the present study was to examine the effect of reducing saturated fat in the diet, or partly replacing it with unsaturated fat, on the serum lipoprotein profile of human subjects. The study had two intervention periods, 8 weeks (phase 1) and 52 weeks (phase 2). In phase 1, total fat was reduced from 31 to 25 % energy (polyunsaturated fatty acids (PUFA):saturated fatty acids (SFA) ratio increased from 0.2 to 0.4) by reducing the quantity of coconut fat (CF) in the diet from 17.8 to 9.3 % energy intake. In phase 2, subjects were randomised to groups A and B. In group A total fat was r

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Lu, Shijian, Fei Yang, Juanjuan Zhang, et al. "Experimental Analysis of Reaction Heat of CO2 Absorption of Phase Change Absorber AEP-DPA at Low Partial Pressure." Energies 16, no. 4 (2023): 1867. http://dx.doi.org/10.3390/en16041867.

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The reaction heat of CO2 absorption by organic amines is directly related to the regenerative heat consumption of absorbers. Therefore, it is necessary to study and determine the heat of absorption reaction and heat of regeneration reaction of CO2 capture solvent before its industrial validation and application. According to the law of thermodynamics, a computer model of the heat of absorption reaction and desorption reaction is established and verified. The heat of reaction of the AEP-DPA phase transition absorption system was studied under different ratios, absorption temperatures, reaction

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Davis, Ronald, Charlotte Sanborn, David Nichols, David M. Bazett-Jones, and Eric L. Dugan. "The Effects of Whole Body Vibration on Bone Mineral Density for a Person With a Spinal Cord Injury: A Case Study." Adapted Physical Activity Quarterly 27, no. 1 (2010): 60–72. http://dx.doi.org/10.1123/apaq.27.1.60.

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Bone mineral density (BMD) loss is a medical concern for individuals with spinal cord injury (SCI). Concerns related to osteoporosis have lead researchers to use various interventions to address BMD loss within this population. Whole body vibration (WBV) has been reported to improve BMD for postmenopausal women and suggested for SCI. The purpose of this case study was to identify the effects of WBV on BMD for an individual with SCI. There were three progressive phases (standing only, partial standing, and combined stand with vibration), each lasting 10 weeks. Using the least significant change

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Takekiyo, Takahiro, Yusuke Imai, Hiroshi Abe, and Yukihiro Yoshimura. "Conformational Analysis of Quaternary Ammonium-Type Ionic Liquid Cation, N,N-Diethyl-N-methyl-N-(2-methoxyethyl) Ammonium Cation." Advances in Physical Chemistry 2012 (August 23, 2012): 1–7. http://dx.doi.org/10.1155/2012/829523.

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Conformational preference of N,N-diethyl-N-methyl-N-(2-methoxyethyl) ammonium cation ([DEME]+), which is one of the quaternary ammonium-based ionic liquid cation, in the gas phase has been investigated using a density functional theory (DFT) calculation. Eight candidates for the stable conformers of [DEME]+ exist in the gas phase, and can it energetically classify into two groups. One is a five conformers group, which has the intramolecular attractive interaction form (the folded form). The other is a three conformers group, which is the noninteraction form (the extended form). The transformat

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Evangelakis, G. A., I. E. Lagaris, D. G. Papageorgiou, and C. Prouskas. "An enthalpy method for heat conduction in tube containing phase change material." Thermal Science and Engineering 8, no. 1 (2025): 9781. https://doi.org/10.24294/tse9781.

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We present an innovative enthalpy method for determining the thermal properties of phase change materials (PCM). The enthalpy-temperature relation in the “mushy” zone is modelled by means of a fifth order Obreshkov polynomial with continuous first and second order derivatives at the zone boundaries. The partial differential equation (PDE) for the conduction of heat is rewritten so that the enthalpy variable is not explicitly present, rendering the equation nonlinear. The thermal conductivity of the PCM is assumed to be temperature dependent and is modelled by a fifth order Obreshkov polynomial

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Kutynia, Karolina, Anna Przybył, and Piotr Gębara. "The Effect of Substitution of Mn by Pd on the Structure and Thermomagnetic Properties of the Mn1−xPdxCoGe Alloys (Where x = 0.03, 0.05, 0.07 and 0.1)." Materials 16, no. 15 (2023): 5394. http://dx.doi.org/10.3390/ma16155394.

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In the present paper, the influence of partial substitution of Mn by Pd on structure, thermomagnetic properties, and phase transitions in the MnCoGe alloys was investigated. The studies of phase constitution revealed an occurrence of the orthorhombic TiNiSi-type and hexagonal Ni2Ti- type phases. Deep analysis of the XRD pattern supported by the Rietveld analysis allowed us to notice the changes in lattice parameters and quantity of recognized phases depending on the Pd content. An increase of palladium in alloy composition at the expense of manganese induced a rise in the Curie temperature. Th

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Liu, Libin, and Zhanpeng Jin. "An investigation of the invariant reactions in the BiPbSrCaCuO system." Journal of Materials Research 11, no. 9 (1996): 2142–51. http://dx.doi.org/10.1557/jmr.1996.0273.

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The phases present around the (Bi, Pb)2Sr2Ca2Cu3Ox (2223) phase between 830–880 °C have been studied by x-ray diffraction (XRD) and electron probe microanalysis (EPMA) methods. The decomposition and melting temperatures of the 2223 phase in these samples have been measured by the differential thermal analysis (DTA) method. Partial substitution of Bi with Pb (Pb: Bi = 3: 22) does not change the 850 °C phase relations around 2223 phase. 2223 decomposes to liquid, Sr7Ca7Cu24O41 (7724), and Ca2CuO3 at 875 °C. The invariant reactions (degree of freedom is zero) among 2223, 7724, Ca2CuO3, CuO, Bi2Sr

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Go, Shao Xiang, Tae Hoon Lee, Stephen R. Elliott, Natasa Bajalovic, and Desmond K. Loke. "A fast, low-energy multi-state phase-change artificial synapse based on uniform partial-state transitions." APL Materials 9, no. 9 (2021): 091103. http://dx.doi.org/10.1063/5.0056656.

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Nakamura, Atsushi, Mamoru Shoji, Harumitsu Miyashita, Naoyasu Miyagawa, Noboru Yamada, and Takashi Ishida. "High-Density Recording on a Dual-Layer Phase Change Disk Using Partial Response Maximum Likelihood Method." Japanese Journal of Applied Physics 42, Part 1, No. 2B (2003): 1072–73. http://dx.doi.org/10.1143/jjap.42.1072.

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