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Journal articles on the topic 'Gravitational Time Advancement'

Author: Grafiati

Published: 18 May 2024

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1

Deng, Xue-Mei, and Yi Xie. "Gravitational time advancement under gravity's rainbow." Physics Letters B 772 (September 2017): 152–58. http://dx.doi.org/10.1016/j.physletb.2017.06.036.

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2

Bhadra, Arunava, and Kamal K. Nandi. "Gravitational time advancement and its possible detection." General Relativity and Gravitation 42, no. 2 (2009): 293–302. http://dx.doi.org/10.1007/s10714-009-0842-6.

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Deng, Xue-Mei. "Probing f ( T ) gravity with gravitational time advancement." Classical and Quantum Gravity 35, no. 17 (2018): 175013. http://dx.doi.org/10.1088/1361-6382/aad391.

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4

Deng, Xue-Mei. "Effects of a brane world on gravitational time advancement." Modern Physics Letters A 33, no. 19 (2018): 1850110. http://dx.doi.org/10.1142/s0217732318501109.

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Solar System tests of a brane world, which is called DMPR model, were studied in recent works. The correction of DMPR model to the general relativity (GR) in the four-dimensional curved spacetime can be parametrized by a “tidal charge” parameter [Formula: see text]. The parameter [Formula: see text] in this model was obtained and improved as [Formula: see text] by the Earth–Mercury ranging. A new test of the DMPR model based on gravitational time advancement is proposed and investigated in this work. The advancement is a gravitational consequence on round-trip proper time duration of a photon.

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Li, Gang, and Xue-Mei Deng. "Testing Photons Coupled to Weyl Tensor with Gravitational Time Advancement." Communications in Theoretical Physics 70, no. 6 (2018): 721. http://dx.doi.org/10.1088/0253-6102/70/6/721.

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6

Bhadra, Arunava, Ramil N. Izmailov, and Kamal K. Nandi. "On the Possibility of Observing Negative Shapiro-like Delay Using Michelson–Morley-Type Experiments." Universe 9, no. 6 (2023): 263. http://dx.doi.org/10.3390/universe9060263.

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The possibility of observing negative Shapiro-like gravitational time delay (or time advancement) due to the Earth’s gravity employing interferometric experiments on the Earth’s surface is discussed. It is suggested that such a measurement may be realized in the near future with the help of modern versions of Michelson–Morley-type experiments.

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7

Lu, Xinyi. "Improved path planning method for unmanned aerial vehicles based on artificial potential field." Applied and Computational Engineering 10, no. 1 (2023): 64–71. http://dx.doi.org/10.54254/2755-2721/10/20230142.

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With the advancement of unmanned aerial vehicle (UAV) technology and its widespread use in many facets of manufacturing and daily life, the need for UAV mission automation is becoming more and more practical. In order to improve the automatic obstacle avoidance and path planning performance of UAVs, this essay proposes an optimized route planning algorithm based on the artificial potential field (APF) method, which have solved the typical issue of the APF. This method chooses to conduct a pre planning trajectory of the UAV based on a rapidly expanding random tree (RRT). The pre-planned path wi

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8

Amati, L., P. T. O’Brien, D. Götz, et al. "The THESEUS space mission: science goals, requirements and mission concept." Experimental Astronomy 52, no. 3 (2021): 183–218. http://dx.doi.org/10.1007/s10686-021-09807-8.

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AbstractTHESEUS, one of the two space mission concepts being studied by ESA as candidates for next M5 mission within its Comsic Vision programme, aims at fully exploiting Gamma-Ray Bursts (GRB) to solve key questions about the early Universe, as well as becoming a cornerstone of multi-messenger and time-domain astrophysics. By investigating the first billion years of the Universe through high-redshift GRBs, THESEUS will shed light on the main open issues in modern cosmology, such as the population of primordial low mass and luminosity galaxies, sources and evolution of cosmic re-ionization, SF

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9

Nazir, Muhammad Shahzad, Ahmed N. Abdalla, Ahmed Sayed M. Metwally, Muhammad Imran, Patrizia Bocchetta, and Muhammad Sufyan Javed. "Cryogenic-Energy-Storage-Based Optimized Green Growth of an Integrated and Sustainable Energy System." Sustainability 14, no. 9 (2022): 5301. http://dx.doi.org/10.3390/su14095301.

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The advancement of using the cryogenic energy storage (CES) system has enabled efficient utilization of abandoned wind and solar energy, and the system can be dispatched in the peak hours of regional power load demand to release energy. It can fill the demand gap, which is conducive to the peak regulation of the power system and can further promote the rapid development of new energy. This study optimizes the various types of energy complementary to the CES system using hybrid gravitational search algorithm-local search optimization (hGSA-LS). First, the mathematical model of the energy storag

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10

Michelini, Maurizio. "Discussion on Fundamental Problems of Physics Hidden in Cosmology." Applied Physics Research 8, no. 5 (2016): 19. http://dx.doi.org/10.5539/apr.v8n5p19.

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<p class="1Body">Astronomers and physicists denounce difficulties in carrying out Cosmological Research in the middle of pseudoscientific strategies. At present, Cosmological modelling follows either some revised Expanding model (i.e. Accelerating universe) or the Static-Evolving model based on the large and old universe observed in the last decades, which convinced astronomers to abandon the Big bang and the Recession of galaxies (Doppler <em>interpretation</em> of Hubble’s redshift). Research on gravitation is made more difficult due to the presence of some misconceptions t

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Stratta, Giulia, and Francesco Pannarale. "Neutron Star Binary Mergers: The Legacy of GW170817 and Future Prospects." Universe 8, no. 9 (2022): 459. http://dx.doi.org/10.3390/universe8090459.

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In 2015, the Advanced Laser Interferometer Gravitational-wave Observatory (LIGO) and Advanced Virgo began observing the Universe in a revolutionary way. Gravitational waves from cosmic sources were detected for the first time, confirming their existence predicted almost one century before, and also directly revealing the existence of black holes in binary systems and characterizing their properties. In 2017, a new revolution was achieved with the first observation of a binary neutron star merger, GW170817, and its associated electromagnetic emission. The combination of the information from gra

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12

Zhong, Zimu. "Principle and State-of-art Observation Scenarios of Black Holes." Highlights in Science, Engineering and Technology 72 (December 15, 2023): 129–35. http://dx.doi.org/10.54097/p5450f83.

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Tracing back to the 17th century, the concept of black holes emerged as "dark stars," celestial bodies with gravitational pull surpassing the speed of light. Schwarzschild's solution to Einstein's equations in 1916 introduced the concept of a singularity and the Schwarzschild radius, defining black holes as objects compressed within this boundary. Two main classification methods for black holes based on mass and charge/angular momentum are discussed’. The study explores the principles of detection: gravitational waves, generated by events like black hole mergers, and gravitational lensing, whe

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13

Shao, Xiaoyun, Zhoujian Cao, Xilong Fan, and Shichao Wu. "Probing the Large-scale Structure of the Universe Through Gravitational Wave Observations." Research in Astronomy and Astrophysics 22, no. 1 (2022): 015006. http://dx.doi.org/10.1088/1674-4527/ac32b4.

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Abstract The improvements in the sensitivity of the gravitational wave (GW) network enable the detection of several large redshift GW sources by third-generation GW detectors. These advancements provide an independent method to probe the large-scale structure of the universe by using the clustering of the binary black holes (BBHs). The black hole catalogs are complementary to the galaxy catalogs because of large redshifts of GW events, which may imply that BBHs are a better choice than galaxies to probe the large-scale structure of the universe and cosmic evolution over a large redshift range.

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14

Graue, A., B. G. Viksund, and B. A. Baldwin. "Reproducible Wettability Alteration of Low-Permeable Outcrop Chalk." SPE Reservoir Evaluation & Engineering 2, no. 02 (1999): 134–40. http://dx.doi.org/10.2118/55904-pa.

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Summary A total of 41 chalk core plugs, cut with the same orientation from large blocks of outcrop chalk, have been aged in crude oil at 90 °C for different time periods, in duplicate sets. Different filtration techniques, filtration temperatures and injection temperatures were used for the crude oil. Oil recovery by spontaneous, room temperature imbibition, followed by a waterflood, was used to produce the Amott water index for cores containing aged crude oil and for cores where the aged crude oil was exchanged by fresh crude oil or decane. The main objective was to establish a reproducible m

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15

D'Amboise, Christopher J. L., Michael Neuhauser, Michaela Teich, et al. "Flow-Py v1.0: a customizable, open-source simulation tool to estimate runout and intensity of gravitational mass flows." Geoscientific Model Development 15, no. 6 (2022): 2423–39. http://dx.doi.org/10.5194/gmd-15-2423-2022.

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Abstract. Models and simulation tools for gravitational mass flows (GMFs) such as snow avalanches, rockfall, landslides, and debris flows are important for research, education, and practice. In addition to basic simulations and classic applications (e.g., hazard zone mapping), the importance and adaptability of GMF simulation tools for new and advanced applications (e.g., automatic classification of terrain susceptible for GMF initiation or identification of forests with a protective function) are currently driving model developments. In principle, two types of modeling approaches exist: proce

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16

Bajpai, Shrish, Siddiqui Sajida Asif, and Syed Adnan Akhtar. "Electromagnetic Education in India." Comparative Professional Pedagogy 6, no. 2 (2016): 60–66. http://dx.doi.org/10.1515/rpp-2016-0020.

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Abstract Out of the four fundamental interactions in nature, electromagnetics is one of them along with gravitation, strong interaction and weak interaction. The field of electromagnetics has made much of the modern age possible. Electromagnets are common in day-to-day appliances and are becoming more conventional as the need for technology increases. Electromagnetism has played a vital role in the progress of human kind ever since it has been understood. Electromagnets are found everywhere. One can find them in speakers, doorbells, home security systems, anti-shoplifting systems, hard drives,

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17

Taheri, Mohammad Ali. "The Cosmic Black Hole." Scientific Journal of Cosmointel 3, TC2EN (2024): 12–37. http://dx.doi.org/10.61450/joci.v3itc2en.176.

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Concurrent with advancements in cosmology, various theories have been proposed about the origin of the universe or its ultimate fate. These theories include the Steady State Theory, Oscillating Universe Theory or Cyclic model, Multiverse Theory, String Theory/M-Theory, Quantum Gravity or Loop Quantum Cosmology, The Big Bang Theory, Inflationary Universe Theory, and the No-Boundary Proposal. Among these, the Big Bang theory has been widely accepted by most scientists, with the Inflation theory serving as its complementary addition. On the other hand, theories such as the big rip, flat universe,

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18

Ghosh, Samrat, Arunava Bhadra, and Amitabha Mukhopadhyay. "Probing dark matter and dark energy through gravitational time advancement." General Relativity and Gravitation 51, no. 4 (2019). http://dx.doi.org/10.1007/s10714-019-2538-x.

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19

Ghosh, Samrat, and Arunava Bhadra. "Influences of dark energy and dark matter on gravitational time advancement." European Physical Journal C 75, no. 10 (2015). http://dx.doi.org/10.1140/epjc/s10052-015-3719-8.

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20

Tuleganova, G. Y., R. Kh Karimov, R. N. Izmailov, A. A. Potapov, A. Bhadra, and K. K. Nandi. "Gravitational time advancement effect in Bumblebee gravity for Earth bound systems." European Physical Journal Plus 138, no. 1 (2023). http://dx.doi.org/10.1140/epjp/s13360-023-03713-y.

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21

Allred, Aaron R., Victoria G. Kravets, Nisar Ahmed, and Torin K. Clark. "Modeling orientation perception adaptation to altered gravity environments with memory of past sensorimotor states." Frontiers in Neural Circuits 17 (July 20, 2023). http://dx.doi.org/10.3389/fncir.2023.1190582.

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Transitioning between gravitational environments results in a central reinterpretation of sensory information, producing an adapted sensorimotor state suitable for motor actions and perceptions in the new environment. Critically, this central adaptation is not instantaneous, and complete adaptation may require weeks of prolonged exposure to novel environments. To mitigate risks associated with the lagging time course of adaptation (e.g., spatial orientation misperceptions, alterations in locomotor and postural control, and motion sickness), it is critical that we better understand sensorimotor

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22

Gordon, Jacob, Martin Frank, and Chishimba Nathan Mowa. "The Mechanobiology of Cervical Remodeling: Characterization of Select Cytoskeletal and Rho‐GTPase Signaling Factors in Mice Cervical Tissue During Pregnancy." FASEB Journal 31, S1 (2017). http://dx.doi.org/10.1096/fasebj.31.1_supplement.881.1.

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During pregnancy the developing fetus exerts an increasing gravitational force as it grows in size. However, the effects and underlying molecular mechanism of this process on the cervix is not well known. Our earlier proteomics studies have provided evidence of presence and changes in levels of cytoskeletal mechano‐mediators with advancement of pregnancy. In the present study, we use real time PCR analysis to further characterize expression of select cytoskeletal genes (Filamin A, Gelsolin, Vimentin, Actinin 1, Caveolin 1, Transgelin, Keratin 1, Profilin 1 and Focal Adhesion Kinase) (day 0, da

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23

Mendonca da Silveira, Francisco Eugenio. "Adiabatic collapse of non-homogeneous self-gravitating gas cloud." Europhysics Letters, October 25, 2023. http://dx.doi.org/10.1209/0295-5075/ad06ee.

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Abstract In this letter, we find the critical mass of a self-gravitating, spherically symmetric gas cloud, above which the fluid, within the bubble, collapses. Our analysis departs from a non-homogeneous equilibrium density, satisfying the Boltzmann relation. A time scale is defined in terms of the adiabatic index of the gas. Subsequently, a sinusoidal perturbation around equilibrium is regarded, thereby leading to a dispersion relation of frequency with wavelength, which does not depend on geometrical curvature effects. Such a formulation clearly justifies that the collapse occurs much faster

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24

Ramaswamy, Shreyas, and Mark R. Giovinazzi. "The journey to Proxima Centauri b." Journal of Emerging Investigators, 2024. http://dx.doi.org/10.59720/23-081.

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In recent years, exoplanets have become one of the most exciting topics in astronomy. While sending humans to a planet light-years away from Earth remains science fiction, recent technological advancements have made the prospect of sending a small probe to an exoplanet not only fascinating but also realistic. In addition to time and ample resources, developing such a probe and guiding it to a world beyond our solar system would require a deep understanding of gravitational dynamics. Here, we considered a simulated journey to Proxima Centauri b to determine the feasibility that a rocket could t

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25

Burns, Eric. "Neutron star mergers and how to study them." Living Reviews in Relativity 23, no. 1 (2020). http://dx.doi.org/10.1007/s41114-020-00028-7.

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AbstractNeutron star mergers are the canonical multimessenger events: they have been observed through photons for half a century, gravitational waves since 2017, and are likely to be sources of neutrinos and cosmic rays. Studies of these events enable unique insights into astrophysics, particles in the ultrarelativistic regime, the heavy element enrichment history through cosmic time, cosmology, dense matter, and fundamental physics. Uncovering this science requires vast observational resources, unparalleled coordination, and advancements in theory and simulation, which are constrained by our

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26

Bhagyashree Patil. "AI in Astronomy." International Journal of Advanced Research in Science, Communication and Technology, July 24, 2023, 476–85. http://dx.doi.org/10.48175/ijarsct-12167.

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This research paper investigates the transformative influence of Artificial Intelligence (AI) on the field of astronomy, revolutionizing data analysis, celestial object classification, exoplanet discovery, and real-time observations. Over the last decade, astronomers have harnessed the power of AI techniques, including machine learning, deep learning, and data mining, to explore the cosmos in unprecedented ways. The first section of this paper examines how AI has significantly enhanced data processing and analysis capabilities in astronomy. AI algorithms efficiently handle vast amounts of obse

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27

"Manipulating the McGinty Equation to Create Stable Micro-Wormholes." International Journal of Theoretical & Computational Physics, March 6, 2024. http://dx.doi.org/10.47485/2767-3901.1038.

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Fractal wormholes represent a novel theoretical concept at the intersection of classical physics and quantum mechanics. This article introduces the ΨFractal equation, a theoretical construct that seeks to describe these hypothetical entities. The equation integrates fundamental constants with parameters like mass, charge, and fractal dimension, suggesting intriguing properties and interactions with the cosmos. The McGinty equation, Ψ(x,t) = ΨQFT(x,t) + ΨFractal(x,t,D,m,q,s), can be used to help explain the fractal structure of space-time. The ΨFractal(x,t,D,m,q,s) term in the equation represen

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28

Gerhard, David. "Three Degrees of “G”s: How an Airbag Deployment Sensor Transformed Video Games, Exercise, and Dance." M/C Journal 16, no. 6 (2013). http://dx.doi.org/10.5204/mcj.742.

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Introduction The accelerometer seems, at first, both advanced and dated, both too complex and not complex enough. It sits in our video game controllers and our smartphones allowing us to move beyond mere button presses into immersive experiences where the motion of the hand is directly translated into the motion on the screen, where our flesh is transformed into the flesh of a superhero. Or at least that was the promise in 2005. Since then, motion control has moved from a promised revitalization of the video game industry to a not-quite-good-enough gimmick that all games use but none use well.

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