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Journal articles on the topic 'Thermally transferred'

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Author: Grafiati
Published: 10 December 2022
Last updated: 29 January 2023

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1

Shen, Z. X., B. Mauz, and A. Lang. "Source-trap characterization of thermally transferred OSL in quartz." Journal of Physics D: Applied Physics 44, no. 29 (July 5, 2011): 295405. http://dx.doi.org/10.1088/0022-3727/44/29/295405.

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2

Adamiec, G., R. M. Bailey, X. L. Wang, and A. G. Wintle. "The mechanism of thermally transferred optically stimulated luminescence in quartz." Journal of Physics D: Applied Physics 41, no. 13 (June 13, 2008): 135503. http://dx.doi.org/10.1088/0022-3727/41/13/135503.

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3

Kim, J. C., G. A. T. Duller, H. M. Roberts, A. G. Wintle, Y. I. Lee, and S. B. Yi. "Dose dependence of thermally transferred optically stimulated luminescence signals in quartz." Radiation Measurements 44, no. 2 (February 2009): 132–43. http://dx.doi.org/10.1016/j.radmeas.2008.12.001.

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4

Yukihara, E. G. "Observation of strong thermally transferred optically stimulated luminescence (TT-OSL) in BeO." Radiation Measurements 121 (February 2019): 103–8. http://dx.doi.org/10.1016/j.radmeas.2018.12.014.

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5

Yukihara, E. G. "Characterization of the thermally transferred optically stimulated luminescence (TT-OSL) of BeO." Radiation Measurements 126 (July 2019): 106132. http://dx.doi.org/10.1016/j.radmeas.2019.106132.

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6

Wang, X. L., A. G. Wintle, and Y. C. Lu. "Thermally transferred luminescence in fine-grained quartz from Chinese loess: Basic observations." Radiation Measurements 41, no. 6 (July 2006): 649–58. http://dx.doi.org/10.1016/j.radmeas.2006.01.001.

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7

Qin, J. T., and L. P. Zhou. "Effects of thermally transferred signals in the post-IR IRSL SAR protocol." Radiation Measurements 47, no. 9 (September 2012): 710–15. http://dx.doi.org/10.1016/j.radmeas.2011.12.011.

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8

Koul, D. K., P. G. Patil, E. O. Oniya, and G. S. Polymeris. "Investigating the thermally transferred optically stimulated luminescence source trap in fired geological quartz." Radiation Measurements 62 (March 2014): 60–70. http://dx.doi.org/10.1016/j.radmeas.2014.01.014.

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9

Barney, C. C., and M. M. Folkerts. "Thermal dehydration-induced thirst in rats: role of body temperature." American Journal of Physiology-Regulatory, Integrative and Comparative Physiology 269, no. 3 (September 1, 1995): R557—R564. http://dx.doi.org/10.1152/ajpregu.1995.269.3.r557.

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Male Sprague-Dawley rats were used to study the possible role of hyperthermia in the thirst associated with thermal dehydration. Rats were exposed to 40 degrees C for 4 h and then allowed access to water at different times after they were transferred to 25 degrees C. Delaying the time prior to allowing the rats to drink did not significantly alter either water intake or percent rehydration even though core temperature decreased during the first 1.5 h after removal from the heat. Exposing thermally dehydrated rats to 5 degrees C for 30 min prior to allowing them access to water also failed to significantly affect water intake or percent rehydration. Thermally dehydrated rats allowed to drink while remaining in the heat did not show a significant increase in water intake during the first hour or percent rehydration over rats drinking at 25 degrees C. Nondehydrated rats did show significant increases in water intake and percent rehydration when allowed to drink in the heat. Hyperthermia does not play a role in drinking in thermally dehydrated rats but can stimulate drinking in water-replete rats.
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10

Pagonis, Vasilis, Ann G. Wintle, Reuven Chen, and X. L. Wang. "Simulations of thermally transferred OSL experiments and of the ReSAR dating protocol for quartz." Radiation Measurements 44, no. 5-6 (May 2009): 634–38. http://dx.doi.org/10.1016/j.radmeas.2009.02.009.

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11

Miyake, C., M. Hirose, S. Imoto, and H. Ohya-Nishiguchi. "ESR and magnetic susceptibility evidence of thermally accessible electron-transferred species in U2Cl10 [φ3As]." Inorganica Chimica Acta 140 (December 1987): 141–44. http://dx.doi.org/10.1016/s0020-1693(00)81070-1.

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12

Yue, Wenkai, Zhimin Li, Peixian Li, Xiaowei Zhou, Yanli Wang, Jinxing Wu, and Junchun Bai. "Ion beam sputtering-deposited thermally annealed h-BN transferred film for improving GaN crystal quality." Materials Chemistry and Physics 275 (January 2022): 125143. http://dx.doi.org/10.1016/j.matchemphys.2021.125143.

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13

Duller, G. A. T., and A. G. Wintle. "A review of the thermally transferred optically stimulated luminescence signal from quartz for dating sediments." Quaternary Geochronology 7 (February 2012): 6–20. http://dx.doi.org/10.1016/j.quageo.2011.09.003.

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14

Ankjaergaard, Christina. "Towards extending the optical dating range using thermally transferred optically stimulated luminescence from fluvial sediments." Quaternary International 279-280 (November 2012): 20. http://dx.doi.org/10.1016/j.quaint.2012.07.085.

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15

Chapot, M. S., G. A. T. Duller, and H. M. Roberts. "Assessing the impact of pulsed-irradiation procedures on the thermally transferred OSL signal in quartz." Radiation Measurements 65 (June 2014): 1–7. http://dx.doi.org/10.1016/j.radmeas.2014.04.003.

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16

Yoon, Dai Geon, Kyung-Tae Kang, and Kwan Hyun Cho. "Thermally transferred emitting layer at low pressure for residual solvent-free organic light-emitting diodes." Organic Electronics 67 (April 2019): 287–93. http://dx.doi.org/10.1016/j.orgel.2019.01.041.

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17

Pupim, Fabiano do Nascimento, André Oliveira Sawakuchi, Thays Desire Mineli, and Luciana Nogueira. "Evaluating isothermal thermoluminescence and thermally transferred optically stimulated luminescence for dating of Pleistocene sediments in Amazonia." Quaternary Geochronology 36 (September 2016): 28–37. http://dx.doi.org/10.1016/j.quageo.2016.08.003.

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18

Hernández-Rodríguez, Juan F., Flavio Della Pelle, Daniel Rojas, Dario Compagnone, and Alberto Escarpa. "Xurography-Enabled Thermally Transferred Carbon Nanomaterial-Based Electrochemical Sensors on Polyethylene Terephthalate–Ethylene Vinyl Acetate Films." Analytical Chemistry 92, no. 19 (September 1, 2020): 13565–72. http://dx.doi.org/10.1021/acs.analchem.0c03240.

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19

Fang, Hui, Jianing Zhao, Ki Jun Yu, Enming Song, Amir Barati Farimani, Chia-Han Chiang, Xin Jin, et al. "Ultrathin, transferred layers of thermally grown silicon dioxide as biofluid barriers for biointegrated flexible electronic systems." Proceedings of the National Academy of Sciences 113, no. 42 (October 18, 2016): 11682–87. http://dx.doi.org/10.1073/pnas.1605269113.

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Materials that can serve as long-lived barriers to biofluids are essential to the development of any type of chronic electronic implant. Devices such as cardiac pacemakers and cochlear implants use bulk metal or ceramic packages as hermetic enclosures for the electronics. Emerging classes of flexible, biointegrated electronic systems demand similar levels of isolation from biofluids but with thin, compliant films that can simultaneously serve as biointerfaces for sensing and/or actuation while in contact with the soft, curved, and moving surfaces of target organs. This paper introduces a solution to this materials challenge that combines (i) ultrathin, pristine layers of silicon dioxide (SiO2) thermally grown on device-grade silicon wafers, and (ii) processing schemes that allow integration of these materials onto flexible electronic platforms. Accelerated lifetime tests suggest robust barrier characteristics on timescales that approach 70 y, in layers that are sufficiently thin (less than 1 μm) to avoid significant compromises in mechanical flexibility or in electrical interface fidelity. Detailed studies of temperature- and thickness-dependent electrical and physical properties reveal the key characteristics. Molecular simulations highlight essential aspects of the chemistry that governs interactions between the SiO2 and surrounding water. Examples of use with passive and active components in high-performance flexible electronic devices suggest broad utility in advanced chronic implants.
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20

Jahan Bakhsh, Kamran, Masami Nakagawa, Mahmood Arshad, and Lucila Dunnington. "On Heat and Mass Transfer within Thermally Shocked Region of Enhanced Geothermal System." Geofluids 2017 (2017): 1–14. http://dx.doi.org/10.1155/2017/2759267.

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An Enhanced Geothermal System (EGS) is an artificially created geothermal reservoir formed by hydrofracturing hot dry rock. Thermal shock occurs when the cold water contacts the hot rock near the injection borehole, creating a network of small, disorganized, closely spaced micro cracks. As the cold-water injection continues, the hot rock cools down and the micro cracks coalesce, becoming a better-defined network of thermal fractures. Thermal fractures in an EGS reservoir are believed to improve reservoir performance by increasing the surface area for heat exchange and lowering flow impedance; however, it is difficult to precisely predict how they grow and affect the permeability of the reservoir. The goal of this paper is to provide an insight into the transport mechanisms within the thin, permeable, thermally shocked region of an EGS reservoir. COMSOL Multiphysics® is used to set up an indealized porous region with identical geometrical features at different domain scales to show the scale dependence of heat and mass transport in the initial microscale crack network and in the later coalesced thermal fractures. This research shows the importance of EGS maturity in determining how heat and mass are transferred and how to select appropriate analytical tools for different stages of development.
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21

Pagonis, V., A. G. Wintle, R. Chen, and X. L. Wang. "A theoretical model for a new dating protocol for quartz based on thermally transferred OSL (TT-OSL)." Radiation Measurements 43, no. 2-6 (February 2008): 704–8. http://dx.doi.org/10.1016/j.radmeas.2008.01.025.

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22

Tsukamoto, Sumiko, Geoff A. T. Duller, and Ann G. Wintle. "Characteristics of thermally transferred optically stimulated luminescence (TT-OSL) in quartz and its potential for dating sediments." Radiation Measurements 43, no. 7 (August 2008): 1204–18. http://dx.doi.org/10.1016/j.radmeas.2008.02.018.

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23

Jiang, Qing-song, He-sheng Liu, Qing-wu Xiao, Shih-feng Chou, Ai-hua Xiong, and Hua-rong Nie. "Three-dimensional numerical simulation of total warpage deformation for short-glass-fiber-reinforced polypropylene composite injection-molded parts using coupled FEM." Journal of Polymer Engineering 38, no. 5 (April 25, 2018): 493–502. http://dx.doi.org/10.1515/polyeng-2016-0445.

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Abstract Based on the effects of natural cooling on the warpage of the injection-molded parts, a concept of total warpage deformation was proposed. A three-dimensional numerical model of total warpage for the injection-molded parts of short-glass-fiber-reinforced polypropylene (PP) composites was established using coupled finite element method (FEM). The total warpage deformation is composed of two parts: stress-induced deformation during injection molding and thermally induced shrinkage deformation after ejection. The residual stress, temperature, and anisotropic thermal and mechanical properties formed in injection molding were subsequently transferred into the thermal stress analysis package as initial conditions. On account of the difference between the fluid and structural mesh, the tetrahedral and hexahedral mesh types were used in injection molding simulation and thermal stress analysis, respectively. The comparison between the simulation and experimental results showed that the simulated warpage deformation agreed well with the experimental measurements quantitatively and qualitatively, suggesting the validation of the proposed numerical model.
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24

Makita, Ryoko, Kiyoaki Tanaka, Yoshichika Ōnuki, and Hiroshi Tatewaki. "Inversion of 4f-states in CeB6 thermally excited at 430 K." Acta Crystallographica Section B Structural Science 63, no. 5 (September 14, 2007): 683–92. http://dx.doi.org/10.1107/s0108768107035021.

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The 4f states of Ce in a typical Kondo crystal, CeB6, are split into an excited state Γ7 and the ground state Γ8, with an excitation energy at 560 K. The electron-density distribution of the thermally excited state was measured at 430 K using a four-circle diffractometer equipped with a small furnace. In contrast to the previous results at lower temperature, electrons are transferred from B6 to Ce at 430 K. X-ray atomic-orbital analysis revealed that the 5d-Γ8 orbitals (the energy level of which is similar to that of the B-2p orbitals) are fully occupied and the 4f-Γ7 orbitals are more populated than the 4f-Γ8 orbitals. Fully occupied 5d-Γ8 makes the 4f-Γ8 states unstable and the energy levels of 4f-Γ7 and 4f-Γ8 are inverted.
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25

Girnik, Ilya, Tianyu Yang, Larisa Gordeeva, Wenwen Wang, Tianshu Ge, and Yuri Aristov. "New Adsorption Method for Moisture and Heat Exchange in Ventilation Systems in Cold Countries: Concept and Mathematical Simulation." Energies 13, no. 6 (March 16, 2020): 1386. http://dx.doi.org/10.3390/en13061386.

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Due to global climate change and fossil fuel depletion, the rational use of thermal energy has attracted great research interest. Large differences between indoor and outdoor temperatures in cold regions results in huge amounts of heat waste and drop in indoor humidity. Ventireg, an adsorption method, has been often recommended for heat and humidity regeneration in cold countries. In this research work, VentireC, an advanced method employing two thermally coupled adsorbent beds is discussed. It allows the heat released during adsorption of moisture in one adsorber to be transferred to another adsorber to facilitate water desorption. The VentireC approach is comprehensively analysed and described in this paper. A composite adsorbent based on LiCl in silica gel pores, which can exchange up to 0.5 g-H2O/g-sorbent, is selected for VentireC processes under cold Western Siberia conditions. Mathematical simulation of humidity recuperation, employing the selected sorbent with and without thermal coupling, demonstrates the advantages of the VentireC process.
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26

Jiang, Xing, Hai-Bao Duan, Marcus J. Jellen, Yu Chen, Tim S. Chung, Yong Liang, and Miguel A. Garcia-Garibay. "Thermally Activated Transient Dipoles and Rotational Dynamics of Hydrogen-Bonded and Charge-Transferred Diazabicyclo [2.2.2]Octane Molecular Rotors." Journal of the American Chemical Society 141, no. 42 (September 24, 2019): 16802–9. http://dx.doi.org/10.1021/jacs.9b07518.

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27

Burbidge, C. I., S. I. Cabo Verde, A. C. Fernandes, M. I. Prudêncio, M. L. Botelho, M. I. Dias, and G. Cardoso. "Dosimetry in the multi kilo-Gray range using optically-stimulated luminescence (OSL) and thermally-transferred OSL from quartz." Radiation Measurements 46, no. 9 (September 2011): 860–65. http://dx.doi.org/10.1016/j.radmeas.2011.05.010.

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28

Pagonis, Vasilis, Grzegorz Adamiec, C. Athanassas, Reuven Chen, Atlee Baker, Meredith Larsen, and Zachary Thompson. "Simulations of thermally transferred OSL signals in quartz: Accuracy and precision of the protocols for equivalent dose evaluation." Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms 269, no. 12 (June 2011): 1431–43. http://dx.doi.org/10.1016/j.nimb.2011.03.026.

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29

Katinas, Egidijus, Maksim Antonov, Vytenis Jankauskas, and Marek Tarraste. "The Effect of Spark Plasma Sintering Thermal Cycle on Behaviour of Fe-Based Hardfacings Reinforced with WC and WC-Based Hardmetal." Key Engineering Materials 799 (April 2019): 3–8. http://dx.doi.org/10.4028/www.scientific.net/kem.799.3.

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The effect of composite materials reinforcement by hardmetal with various size of particles (WC 710-1000 μm, recycled WC-Co 710-800 μm and pure WC 10 μm) with Fe-based matrix thermally affected by spark plasma sintering (SPS) method at temperatures 1100°C, 1200°C and 1280°C was studied. The analysis of samples cross-section was performed with SEM and EDS to illustrate distribution of elements after thermal influence. The aim of this research was an investigation of diffusion process behaviour between Fe-based matrix and WC and WC based hardmetal particles at various temperatures. Results help to identify and understand melting and solidification of grains affected at high temperature. Similar temperatures are used for surfacing and repair of worn parts and recycled tungsten carbide particles (as reinforcement) could be used during manual or plasma transferred arc welding.
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30

Zhu, J., D. Zou, and S. Liu. "Real-Time Monitoring and Simulation of Thermal Deformation in Plastic Package." Journal of Electronic Packaging 120, no. 2 (June 1, 1998): 160–65. http://dx.doi.org/10.1115/1.2792609.

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Thermally-induced failure is a major reliability issue for electronic packaging. Due to the highly nonlinear behaviors and thermal mismatch of packaging materials, an electronic package exhibits uneven thermal deformation in the whole temperature range during thermal cycling. This behavior will affect the buildup of thermal strain/stress within the package, which may affect the reliability of the package. Therefore, a real-time method is needed to monitor the thermal deformation of packages during the thermal cycling. In this study, a real-time moire´ interferometry technique coupled with a thermal vacuum chamber is used to monitor the thermal deformation of a plastic package. A grating is transferred onto the cross section of the sample at room temperature. The fringe patterns are recorded by a CCD camera system and are compared with the displacement contours obtained by nonlinear finite element simulation. High temperature moire´ results up to 200°C are reported here. The comparison between the moire´ fringe patterns and finite element results shows a good agreement. The results also show that the real-time moire´ interferometry technique is an effective way to monitor the thermal deformation of electronic packaging and is a powerful validation method for finite element analysis.
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31

Obelode, Esther, and Jens Gibmeier. "Influence of the Interfacial Roughness on Residual Stress Analysis of Thick Film Systems by Incremental Hole Drilling." Materials Science Forum 768-769 (September 2013): 136–43. http://dx.doi.org/10.4028/www.scientific.net/msf.768-769.136.

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Thick film systems with coating thicknesses between 50 and 1000 µm are often fabricated by thermal spray processes. During the deposition and due to the substrate pre-treatment residual stresses, which influence the coating properties, develop. Due to the substrate preconditioning thermal spray coatings exhibit a large interfacial roughness. This study investigates the application of the incremental hole-drilling method on thermal spray coatings. The focus is on the influence of the interfacial roughness on the residual stress evaluation. A systematic FE-study was carried out in order to minimize the final error for the residual stress evaluation. The simulation results are transferred to experimental hole-drilling results of a thermally sprayed model thick film system. Finally, the hole-drilling results are compared to the residual stress depth profile that was determined by X-ray diffraction in combination with successive electrochemical layer removal. The results clearly show that the effect of the interfacial roughness can be neglected for residual stress calculation if the mean coating thickness is properly considered for calculation of the calibration function / parameters.
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32

Pursky, O. I., V. F. Gamaliy, P. G. Demidov, V. V. Dyvak, V. V. Kozlov, and H. B. Danylchuk. "Quantum-mechanical approach to simulation of molecular crystals thermal conductivity." Journal of Physics: Conference Series 2288, no. 1 (June 1, 2022): 012025. http://dx.doi.org/10.1088/1742-6596/2288/1/012025.

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Abstract This article is devoted to the implementation of scientific achievements into the educational process of physics specialties students in the framework of study course “Solid State Physics”. In this work, based on our previous scientific results, we present a quantum-mechanical approach that can adequately describe the temperature dependences of the dielectric crystals thermal conductivity. The basic provisions of quantum-mechanical approach are studied by students in the framework of university study course “Solid State Physics” and are based on Einstein and Debye classical models. This approach is based on the assumption that in dielectric crystals heat is transferred due to the phonons (Debye model) and thermal diffusion between the thermally activated neighboring quantum mechanical oscillators directly from site to site on a time scale of one-half of the oscillation period (Einstein model). In term of this consideration the thermal conductivity of molecular crystals are simulated in the framework of thermal conductivity model where heat is transferred by low-frequency phonons with taking into account phonon–rotation coupling, and above the phonon mobility edge by “diffusive” modes. For this purpose the theoretical temperature dependences of the isochoric thermal conductivity have been calculated numerically in the interval near or over the Debye temperature and compared with experimental results for solid C6H12, CHCl3 and CH2Cl2. Using simple molecular crystals as an example it is shows the dualism of the nature of heat transfer processes in the temperature region of the order of the Debye temperature and above. The obtained results will be useful for implementation in the educational process in the study course “Solid State Physics” in particular for understanding the features of heat transfer in the high-temperature range of dielectric crystals existence.
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33

Zheng, Y., H. Li, W. W. Olson, and J. W. Sutherland. "Evaluating Cutting Fluid Effects on Cylinder Boring Surface Errors by Inverse Heat Transfer and Finite Element Methods." Journal of Manufacturing Science and Engineering 122, no. 3 (September 1, 1999): 377–83. http://dx.doi.org/10.1115/1.1285865.

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Sets of dry and wet boring experiments are conducted to estimate the amount of heat transferred into the workpiece and the cutting fluid heat convection coefficient in a boring operation by an inverse heat transfer method. The temperature distribution in the bore is predicted using a heat transfer model that includes heat convection on the inner and outer bore walls. The developed model is solved by an integral transform approach. The thermal expansion of the bore is then calculated using the finite element method (FEM). Surface error due to the cutting forces is also predicted using FEM and added to the thermally induced surface error to give the total surface error. The actual surface error of bores machined under dry and wet cutting conditions are measured and compared with the predicted surface error. Very good agreement between measured and predicted surface errors is observed. [S1087-1357(00)00802-9]
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34

Donaldson, John D., Susan M. Grimes, Lina Mehta, and Ahmad J. Jafari. "Application of Thermal Desorption to the Development of a Gas Chromatographic/Mass Spectrometric Method for the Determination of Toluene, Chlorinated Aromatic Hydrocarbons, and 2,3,7,8-Tetrachlorodibenzo-p-Dioxin in Combustion Emissions." Journal of AOAC INTERNATIONAL 86, no. 1 (January 1, 2003): 39–43. http://dx.doi.org/10.1093/jaoac/86.1.39.

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Abstract A fast and accurate analytical method, which uses commercially available adsorbents (Tenax TA, Carbotrap B and C, and Carbosieve S-III), was developed for the sampling and determination of aromatic hydrocarbons, chloroaromatic compounds, and 2,3,7,8-tetrachlorodibenzo-p-dioxin. The breakthrough volume data show that Carbotrap C has a good capacity for compounds of high molecular weight, whereas Carbosieve S-III and Tenax TA are efficient for volatile compounds. The organic components are thermally desorbed and transferred to a gas chromatograph/mass spectrometer. Importantly, thermal desorption avoids conventional solvent extraction procedures and also allows reuse of adsorbent tubes. Preliminary results for recovery of analytes from tubes packed with single adsorbent prove that a single-adsorbent bed is not capable of sampling a wide range of compounds. The best method to obtain the desired collection and desorption properties is to use adsorbent tubes containing several different materials. The results of optimization studies are summarized.
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35

Soker, Noam. "The role of thermal pressure in jet launching." Proceedings of the International Astronomical Union 3, S243 (May 2007): 195–202. http://dx.doi.org/10.1017/s1743921307009556.

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AbstractI present and discuss a unified scheme for jet launching that is based on stochastic dissipation of the accretion disk kinetic energy, mainly via shock waves. In this scheme, termed thermally-launched jet model, the kinetic energy of the accreted mass is transferred to internal energy, e.g., heat or magnetic energy. The internal energy accelerates a small fraction of the accreted mass to high speeds and form jets. For example, thermal energy forms a pressure gradient that accelerates the gas. A second acceleration stage is possible wherein the primary outflow stretches magnetic field lines. The field lines then reconnect and accelerate small amount of mass to very high speeds. This double-stage acceleration process might form highly relativistic jets from black holes and neutron stars. The model predicts that detail analysis of accreting brown dwarfs that launch jets will show the mass accretion rate to beṀBD≳ 10−9− 10−8M⊙yr−1, which is higher than present claims in the literature.
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36

TAKAHASHI, KAZUTOSHI, MASAO KAMADA, YO-ICHIRO DOI, KAZUTOSHI FUKUI, TAKESHI TAYAGAKI, and KOICHIRO TANAKA. "PHOTOINDUCED PHASE TRANSITION OF A SPIN-CROSSOVER COMPLEX STUDIED WITH THE COMBINATION OF SR AND LASER." Surface Review and Letters 09, no. 01 (February 2002): 319–23. http://dx.doi.org/10.1142/s0218625x02002312.

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We have performed a photoemission study on an organometal spin-crossover complex, [ Fe(2-pic) 3] Cl 2 EtOH , using the combination of synchrotron radiation and laser. The core-level and valence-band photoemission spectra were measured for high-spin, low-spin, and photoinduced phases. The N 1s and valence-band spectra showed remarkable changes due to the photoinduced phase transition, indicating that the electron charge was transferred from nitrogen to iron at the photoinduced phase transitions. It was also found that the valence-band structure of the photoinduced phase is very different from that of the high-spin phase caused by the thermally induced phase transition.
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37

Li, Xiangmeng, Jinyou Shao, Xijing Zhu, and Huifen Wei. "MWCNTs patterning by thermally enhanced and confined evaporation for transparent and conductive thin film." Modern Physics Letters B 32, no. 29 (October 20, 2018): 1850360. http://dx.doi.org/10.1142/s0217984918503608.

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Conductive and transparent thin film structures are useful in flexible electronics. In this paper, we report multi-walled carbon nanotubes (MWCNTs) patterning into gradient regular patterns with large area of about several square centimeters on silicon or wafer glass slide via thermally enhanced evaporative self-assembly under wedge-shaped geometric confinement. The morphologies, electrical and optical properties of the MWCNTs thin film were characterized. The findings reveal that the conductance would increase with depositing times, meanwhile the transparency would decrease. The resistance of the grid patterning films of MWCNTs has a nearly linear relation to the transmittance in a relatively large range. The MWCNTs can be easily transferred to flexible substrate such as PET films or an adhesive tape. In comparison, SWCNTs could hardly be deposited into stripes or grid patterns, but the continuous thick films and discontinuous thin films could demonstrate better electrical and mechanical performance.
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38

Simunovic, Katica, Sara Havrlisan, Tomislav Saric, and Djordje Vukelic. "Modeling and Optimization in Investigating Thermally Sprayed Ni-Based Self-Fluxing Alloy Coatings: A Review." Materials 13, no. 20 (October 15, 2020): 4584. http://dx.doi.org/10.3390/ma13204584.

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In investigating thermally sprayed Ni-based self-fluxing alloy coatings, widely applied under conditions of wear, corrosion, and high temperatures, designed experiments and statistical methods as a basis for modeling and optimization have become an important tool in making valid and comparable conclusions. Therefore, this paper gives an overview of investigating Ni-based self-fluxing alloy coatings deposited by thermal spraying by the use of designed experiments and statistical methods. The investigation includes the period of the last two decades and covers the treatments of flame spraying, high-velocity oxy/air fuel spraying, plasma spraying, plasma-transferred arc welding, and laser cladding. The main aim was to separate input variables, as well as measured responses, and to point out the importance of correct application of statistical design of experiment. After the review of the papers, it was concluded that investigators have used the process knowledge to analyze and interpret the results of the statistical analysis of experimental data, which is in fact the best way of using the design of experiment in every research. Nevertheless, more attention should be given to correct planning and conducting the experiments to derive the models suitable for the prediction of measured response and which could be an appropriate input for single- or multi-objective optimization.
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39

de Boode, Brent, Chris Phillips, Yin Cheung Lau, Arturas Adomkevicius, James McGettrick, and Davide Deganello. "Glassy carbon manufacture using rapid photonic curing." Journal of Materials Science 57, no. 1 (January 2022): 299–310. http://dx.doi.org/10.1007/s10853-021-06648-w.

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AbstractPhotonic curing was explored as a rapid method for producing glassy carbon coatings, reducing processing time from ~ 20 h for conventional thermal processing down to ~ 1 min. A resole-type thermoset polymer resin coated on steel foil was used as a precursor, placed in a nitrogen purged container and exposed to high energy light (~ 27 J/cm2 per pulse for up to 20 pulses). Comparison samples were produced at 800 °C using a conventional nitrogen purged thermal route. For both photonic and conventionally produced coatings, Raman spectroscopy and primary peak XPS data showed sp2 bonded carbon, indicative of bulk glassy carbon. This transformation evolved with increasing number of pulses, and therefore amount of energy transferred to the coating. The produced coatings were resilient, highly smooth, with no evidence of surface defects. XPS analysis indicated greater sp3 content at the immediate surface (5–10 nm) for photonic cured carbon compared with thermally cured carbon, likely due to the local environment (temperature, atmosphere) around the surface during conversion. The ability to rapidly manufacture glassy carbon coatings provides new opportunities to expand the window of applications of glassy carbons in coatings towards large-scale high volume applications.
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40

Hessien, M. M., Nader El-Bagoury, M. H. H. Mahmoud, and Osama M. Hemeda. "Synthesis and Characterization of Nanocrystalline Barium–Samarium Titanate." High Temperature Materials and Processes 35, no. 5 (May 1, 2016): 499–505. http://dx.doi.org/10.1515/htmp-2015-0021.

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AbstractBarium–samarium titanate nanopowder (Ba0.85 Sm0.1TiO3) was synthesized through tartrate precursor route. The effect of annealing temperature on the formation, crystalline size, morphology and magnetic properties was systematically studied. The annealing temperature was varied from 600°C to 1,100°C. Thermal analysis measurement (TG-DSC, thermogravimetry-differential scanning calorimetry) was carried out on the precursor to characterize the thermal decomposition behavior. The results showed that the precursor of Ba–Sm–Ti mixture decomposed thermally in multistep weight loss up to about 480°C and perovskite Ba0.85Sm0.1TiO3 started to form at ~520°C. X-ray diffraction and Fourier transform infrared (FTIR) spectroscopic measurements showed that the synthesized Ba0.85Sm0.1TiO3 has a tetragonal dominant structure with the presence of intermediate SmTi2O3 at lower annealing temperature. The ratio of SmTi2O3 was decreased and completely disappeared at higher annealing temperatures. The tetragonality, the theoretical density and the crystalline size were increased by increasing annealing temperature. The crystalline size is still in nano-range of 12.4–19.9 nm even after annealing at 1,100°C. The morphology of the produced sample transferred from nano-cubes to nano-whisker to nano-mace (nano-aggregates) with the increase of annealing temperature.
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41

Wang, Wan, Changrim Lee, Martha Pastuszka, Gordon W. Laurie, and J. Andrew MacKay. "Thermally-Responsive Loading and Release of Elastin-Like Polypeptides from Contact Lenses." Pharmaceutics 11, no. 5 (May 7, 2019): 221. http://dx.doi.org/10.3390/pharmaceutics11050221.

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Contact lenses are widely prescribed for vision correction, and as such they are an attractive platform for drug delivery to the anterior segment of the eye. This manuscript explores a novel strategy to drive the reversible adsorption of peptide-based therapeutics using commercially available contact lenses. To accomplish this, thermo-sensitive elastin-like polypeptides (ELPs) alone or tagged with a candidate ocular therapeutic were characterized. For the first time, this manuscript demonstrates that Proclear CompatiblesTM contact lenses are a suitable platform for ELP adsorption. Two rhodamine-labelled ELPs, V96 (thermo-sensitive) and S96 (thermo-insensitive), were employed to test temperature-dependent association to the contact lenses. During long-term release into solution, ELP coacervation significantly modulated the release profile whereby more than 80% of loaded V96 retained with a terminal half-life of ~4 months, which was only 1–4 days under solubilizing conditions. A selected ocular therapeutic candidate lacritin-V96 fusion (LV96), either free or lens-bound LV96, was successfully transferred to HCE-T cells. These data suggest that ELPs may be useful to control loading or release from certain formulations of contact lenses and present a potential for this platform to deliver a biologically active peptide to the ocular surface via contact lenses.
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42

Lu, F., J. Bickford, C. Novotny, P. K. L. Yu, S. S. Lau, K. Henttinen, T. Suni, and I. Suni. "Strain and electrical characterization of metal-oxide-semiconductor field-effect transistor fabricated on mechanically and thermally transferred silicon on insulator films." Journal of Vacuum Science & Technology B: Microelectronics and Nanometer Structures 22, no. 6 (2004): 2691. http://dx.doi.org/10.1116/1.1819926.

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43

Koul, D. K., P. G. Patil, E. O. Oniya, and G. S. Polymeris. "Corrigendum to ‘Investigating the thermally transferred optically stimulated luminescence source trap in fired geological quartz’ Radiat. Meas. (62C) (March 2014) 60–70." Radiation Measurements 67 (August 2014): 47. http://dx.doi.org/10.1016/j.radmeas.2014.05.012.

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44

Gołębiowski, J., and J. Forenc. "Parallel computations of the step response of a floor heater with the use of a graphics processing unit. Part 1: models and algorithms." Bulletin of the Polish Academy of Sciences: Technical Sciences 61, no. 4 (December 1, 2013): 943–48. http://dx.doi.org/10.2478/bpasts-2013-0101.

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Abstract The article presents a method of computing the step response of an air floor heater. The method implements parallel algorithms on a graphics processing unit. In the analyzed concrete slab heating ducts are placed. Hot air is transferred through them, thanks to which the heat penetrates into the slab. Heat transfer into the environment takes place on the top surface of the floor by natural convection and radiation. The bottom surface of the slab is thermally insulated. A two-dimensional heat equation was discretized with the use of the implicit finite difference method. In order to solve the obtained system of equations, the conjugate gradient method was used. Moreover, in order to examine the possibility of shortening the computations time, the algorithm of this method was implemented on a graphics processing unit. A computer program, using the CUDA parallel computing platform and linear algebra libraries CUBLAS and CUSPARSE, was developed
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45

Figarska-Warchoł, Beata, Marek Rembiś, and Grażyna Stańczak. "The impact of calcination on changes in the physical and mechanical properties of the diatomites of the Leszczawka Member (the Outer Carpathians, Poland)." Geology, Geophysics and Environment 45, no. 4 (January 25, 2020): 269. http://dx.doi.org/10.7494/geol.2019.45.4.269.

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The work concerned the effects of the thermal treatment of diatomites from the Jawornik deposit (an example of the diatomites of the Leszczawka Member of the Polish Outer Carpathians). Five distinct lithological varieties were subjected to calcination at 600°C in ambient air.The thermal impact induced the following changes to the rocks. Their overall rock porosity increased, most distinctly in the initially softer varieties, and the internal pores of the siliceous frustules themselves usually became larger due to the initial melting of the silica phases. Most of the diatoms, quartz and feldspars cracked as a result of their brittle fracturing under compressive strain resulting from substantial and differing size changes of growing grains. Clay minerals were thermally transferred, changing their volume. The organic matter dispersed through-out the diatomites was partly oxidized and removed. At the same time, the structure of the rocks was strengthened, as confirmed by an increase in their microhardness. The microhardness of soft and porous diatomite varieties increased considerably on heating, but that of the hard and compact variety changed to a smaller degree. The increase is directly related to the content of the clay minerals. The impact of other mineral components was not detected. The calcination of lithologically diversified diatomites provided the mineral with raw material with deicing and antisliding properties. The technology of its production has been determined by the authors and submitted as a patent.
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46

Feil, Alexander, Erdogan Coskun, Marcel Bosling, Sebastian Kaufeld, and Thomas Pretz. "Improvement of the recycling of plastics in lightweight packaging treatment plants by a process control concept." Waste Management & Research: The Journal for a Sustainable Circular Economy 37, no. 2 (January 24, 2019): 120–26. http://dx.doi.org/10.1177/0734242x19826372.

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In Germany, only approximately 30% by mass of plastics from lightweight packaging waste is recycled; 65% by mass is transferred to inferior residual fractions (sorting residue and mixed plastics), which are currently only utilized thermally. An increase in the recycling of valuable resources in the sense of material recycling would both contribute to the saving of resources and improve the economic situation of plant operators. It is generally known from operating and planning experience that fluctuation in the amount of material loaded into the sorting process is one of the main reasons for suboptimal recycling quotas. In particular, overfilling in the input stream leads to a deterioration of the separation result of the entire process. A novel process control concept envisages equalizing the material flow in such a way that all separation steps are operated in the intended design range. For the example of a lightweight packaging treatment process, the requirements and technological solutions for a sensor-based process control concept will be presented.
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47

He, Tao, Yukun Zhao, Xiaodong Zhang, Wenkui Lin, Kai Fu, Chi Sun, Fengfeng Shi, et al. "Solar-blind ultraviolet photodetector based on graphene/vertical Ga2O3 nanowire array heterojunction." Nanophotonics 7, no. 9 (August 28, 2018): 1557–62. http://dx.doi.org/10.1515/nanoph-2018-0061.

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AbstractIn this paper, a solar-blind ultraviolet photodetector (PD) based on the graphene/vertical Ga2O3 nanowire array heterojunction was proposed and demonstrated. To the best of our knowledge, it is the first time that vertical Ga2O3 nanowire arrays have been realized. Ga2O3 nanowires were obtained by thermally oxidizing GaN nanowires grown by molecular beam epitaxy on n-doped Si substrate. Then, a monolayer graphene film was transferred to Ga2O3 nanowires to form the graphene/vertical Ga2O3 nanowire array heterojunction and transparent electrodes. The fabricated device exhibited a responsivity (R) of 0.185 A/W and rejection ratio (R258 nm/R365 nm) of 3×104 at the bias of −5 V. Moreover, the fast response times of this PD were 9 and 8 ms for the rise and decay times under 254 nm illumination, respectively, which are attributed to the unique properties of nanowire arrays and the graphene/vertical Ga2O3 nanowire array heterojunction structure.
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48

Barclay, L. Ross C., Kelly A. Dakin, and Hayder A. Zahalka. "Ascorbate: antioxidant activity determined in a hydrocarbon phase using quaternary ammonium salts as phase-transfer agents." Canadian Journal of Chemistry 70, no. 8 (August 1, 1992): 2148–53. http://dx.doi.org/10.1139/v92-270.

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By shaking sodium ascorbate with tetra-n-butyl ammonium bromide in a two-phase system consisting of water and organic phases, such as 1,1,2,2-tetrachloroethane (TCE) or chlorobenzene, sufficient concentrations of the quaternary ammonium-ascorbate (quat-ascorbate) are transferred into the organic phase to be useful for antioxidant studies in non-polar solvents. The antioxidant activity of the quat-ascorbate was determined by measurement of the (inhibition) rate constant, kinh, for the inhibition of autoxidation of styrene initiated thermally by azobisisobutyrylnitrile (AIBN) at 30 °C. The kinh of ascorbate in styrene, found to be (9.63 ± 2.0) × 104 M−1 s−1, is very much lower than that found for ascor-byl-6-palmitate, kinh = (110 ± 11) × 104 M−1 s−1 under these conditions. The differences are discussed in terms of the relative effectiveness of hydrogen-atom transfer from the enolic hydroxyl at position 2 of the ascorbate ion compared with the more facile such transfer from position 3 of ascorbyl 6-palmitate in a nonpolar medium.
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49

Wang, Ying, Wentai Luo, Todd N. Rosenstiel, and James F. Pankow. "Measurement of enantiomer percentages for five monoterpenes from six conifer species by cartridge-tube-based passive sampling adsorption–thermal desorption (ps-ATD)." Atmospheric Measurement Techniques 15, no. 15 (August 15, 2022): 4651–61. http://dx.doi.org/10.5194/amt-15-4651-2022.

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Abstract. Many monoterpenes have at least two different stereochemical forms, and many biosynthetic pathways are known to favor one product over the other(s). A rapid method was developed and used in the determination of the (-/+)-enantiomeric distributions for α-pinene, β-pinene, camphene, limonene, and β-phellandrene as emitted by plant material from six conifer species. The six species included the two pine species Pseudotsuga menziesii and Pinus ponderosa, as well as the four cypress species Chamaecyparis lawsoniana, Thuja plilcata, Juniperus chinensis, and Thuja occidentalis. The method involved passive sampling adsorption–thermal desorption (ps-ATD). During sampling, the cartridge tube was placed in a 60 mL glass vial with plant material for 1 h. Sample analytes were thermally transferred to a chiral gas chromatography (GC) column. Detection was by mass spectrometry (MS). The six species exhibited different emission patterns for the five monoterpenes in the -/+ totals, although within a given species the distributions among the five monoterpenes were similar across multiple plants. β-pinene dominated in P. menziesii and P. ponderosa, and α-pinene dominated in T. plicata and T. occidentalis. The chiral separations revealed differences in the -/+ enantiomeric distributions among the species. The (−)-enantiomers of α-pinene and β-pinene dominated strongly in P. menziesii and P. ponderosa; the (−)-enantiomer of β-phellandrene dominated in C. lawsoniana. The dependence of the method precision on percent enantiomer abundance is discussed.
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50

Biswas, R. H. "Development and Application of Luminescence to Earth and Planetary Sciences: Some Landmarks." Defect and Diffusion Forum 357 (July 2014): 217–43. http://dx.doi.org/10.4028/www.scientific.net/ddf.357.217.

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Luminescence, mainly thermoluminescence (TL) and optically stimulated luminescence (OSL), has been researched for more than five decades towards its application to earth and planetary sciences. Luminescence production mechanism has been understood through several theoretical studies, like analytical kinetic theory, numerical models along with the experimental results. Instrument development has progressed with aim from user friendly TL/OSL reader dedicated for dating to challenging reader forin-situMartian sediment dating. Since the development of optical dating in 1985, the technique revolutionised the research in earth sciences. And since then to recent, many methodologies have been developed and some are in developing stage using different signals, like, single grain OSL, red TL, time resolved OSL, thermally transferred OSL (TT-OSL), post infrared-infrared stimulated luminescence (pIR-IRSL), violet light stimulated luminescence (VSL), infrared radioluminescence (IRRL), etc. with an objective to improve the accuracy and precision and to extend the dating range. The wide range of application in different environment, e.g. aeolian, fluvial, marine, glacier, soil, volcanic materials, heated materials, shocked materials, meteorites, etc. have made the technique successful to understand the quaternary history of earth and planetary information like terrestrial and cosmic ray exposure ages of meteorite, meteoroid orbit, thermal metamorphism history of meteorite etc. The aim of this present paper is to discuss some landmarks and recent trends in the development and application in these areas. Contents of the Paper
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