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Preprint ARTICLE | doi:10.20944/preprints202105.0518.v1

Effects of Higher Order Retarded Gravity

Asher Yahalom

Subject: Physical Sciences, Acoustics Keywords: Galaxies; rotation curves; gravitational retardation

Online: 21 May 2021 (10:00:07 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201607.0036.v1

The Classifications and Some Correlations for Fermi Blazars

Junhui Fan, Y Liu, J.H. Yang, C Lin, J.M. Hao

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: galaxies: active; galaxies: jets; galaxies: nuclei

Online: 15 July 2016 (09:37:39 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202109.0319.v2

Modified Gravity and Dark Matter

Syed Abbas, Nasim Akhtar, Danish Alam

Subject: Physical Sciences, Quantum Science And Technology Keywords: Modified Gravity; quantum mechanics; Galilei group; exchange forces; Bargmann Superselection rule; neutron-proton Majorana interaction; Dark Matter

Online: 29 September 2021 (16:11:32 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201905.0335.v1

An Alternative to Dark Matter?A Cosmological Model of Galaxy Rotation Using Cosmological Gravity Force, F_Λ (ALW)

Jean Perron

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: cosmological parameters numerical values; cosmology early universe; galaxies kinematic and dynamic; galaxies Coma cluster; galaxies evolution

Online: 28 May 2019 (11:00:50 CEST)

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A cosmological model was developed using the equation of state of photon gas, as well as cosmic time. The primary objective of this model is to see if determining the observed rotation speed of galactic matter is possible, without using dark matter (halo) as a parameter. To do so, a numerical application of the evolution of variables in accordance with cosmic time and a new state equation was developed to determine precise, realistic values for a number of cosmological parameters, such as energy of the universe , cosmological constant Λ, curvature of space k, energy density , age of the universe etc. Some assumptions were put forth in order to solve these equations. The current version of the model partially explains several of the observed phenomena that raise questions. Numerical application of the model has yielded the following results, among others: Initially, during the Planck era, at the very beginning of Planck time, , the universe contained a single photon at Planck temperature Planck energy in the Planck volume. During the photon inflation phase (before characteristic time ~10^-9 ), the number of original photons (alphatons) increased at each unit of Planck time and geometrical progression ~n³, where n is the quotient of cosmic time over Planck time . Then, the primordial number of photons reached a maximum of N~10⁸⁹, where it remained constant. It's primordial photons (alphatons) are still present today and represents the essential of the energy contained in the universe via the cosmological constante . Such geometric growth in the number of photons can bring a solution to the horizon problem through exchange and a photon energy volume that is in phase with that of the the volume energy of the universe. The age of the universe in cosmic time that is in line with positive energy conservation (in terms of conventional thermodynamics) and the creation of proton, neutron, electron, and neutrino masses, is ~76 [Gy] (observed . The predicted total mass (p, n, e and n), based on the Maxwell-Juttner relativistic statistical distribution, is ~7x10⁵⁰ . The predicted cosmic neutrino mass is ≤ 8.69x10^-32 (≤ 48.7 ) if based on observations of SN1987A. The temperature variation of the cosmic microwave background (CMB), as measured by Planck, can be said to be partially due to energy variations in the universe (DU/U) during the primordial baryon synthesis (energy jump from the creation of protons and neutrons). In this model, what is usually referred to as dark energy actually corresponds to the energy of the universe that has not been converted to mass, and which acts on the mass created by the energy-mass equivalence principle and the cosmological gravity field, , associated with the cosmological constant, which is high during primordial formation of the galaxies (<1 [Gy]). A look at the Casimir effect makes it possible to estimate a minimum Casimir pressure and thus determine our possible relative position in the universe at cosmic time 0,1813 (t₀/t_W=13,8 /76,1 ). Therefore, from the observed age of 13,8 [Gy], we can derive a possible cosmic age of 76,1 [Gy]. That energy of the universe, when taken into consideration during the formation of the first galaxies (< 1 [Gy]), provides a relatively adequate explanation of the non-Keplerian rotation of galactic masses. Indeed, such residual, non-baryonic energy, when considered in Newton’s gravity equation, adds the term , which can partially explain, without recourse to dark matter, the rotations of some galaxies, such as M33, UGC12591, UGC2885, NGC3198, NGC253, DDO161, UDG44, the MW and the Coma cluster. Today, in the MW, that cosmological gravity force is in the order of 10²⁶ times smaller than the conventional gravity force. The model predicts an acceleration of the mass in the universe (q~ 0,986); the energy associated with curvature is the driving force behind the expansion of the universe, rather than the energy associated with the cosmological constant . An equation to determine expansion is obtained using the energy form of the Friedmann equation relative to Planck power and cosmic time or Planck force acting at the frontier of the universe moving at c. This constant Planck force, from unknown sources, acts everywhere to the expansion of the universe as a stretching effect on the volume. Finally, the model partly explains the value a₀ of the MOND theory. Indeed, a₀ is not a true constant, but depends on the cosmological constant at the time the great structures were formed (~1 [Gy]), as well as an adjustment of the typical mass and dimension of those great structures, such as galaxies. The constant a₀is a different expression of the cosmological gravity force as expressed by the cosmological constant, Λ, acting through the energy-mass equivalent during the formation of the structures. It does not put in question the value of G.

Preprint ARTICLE | doi:10.20944/preprints202311.1924.v1

Reconstructing Modified and Alternative Theories of Gravity

Dalia Saha, Manas Chakrabortty, Abhik Kumar Sanyal

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: Modifeied and alternative theories of gravity; Reconstruction; Inflation

Online: 30 November 2023 (10:34:30 CET)

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Preprint ARTICLE | doi:10.20944/preprints201910.0375.v3

A Unified Electro-Gravity Theory to Model Spiral Galaxies without Dark Matter

Nirod K. Das

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: Unified Electro-Gravity (UEG) Theory; Spiral Galaxy; Galaxy Cluster; Dark Matter; Modified Newtonian Dynamics (MOND)

Online: 20 July 2023 (10:50:24 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202401.0174.v1

A Critical Examination of the Standard Cosmological Model: Toward a Modified Framework for Explaining Cosmic Structure Formation and Evolution

Robert Nyagisera, Dismas Simiyu Wamalwa, Benard Rapando, Celine Awino, Maxwell Mageto

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: Modified redshift; Friedmann; Number density; Light intensity; Galaxies

Online: 3 January 2024 (09:03:32 CET)

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Preprint ARTICLE | doi:10.20944/preprints201607.0040.v1

A panchromatic view of relativistic jets in narrow-line Seyfert 1 galaxies

Filippo D'Ammando, Monica Orienti, Justin Finke, Josefin Larsson, Marcello Giroletti, Claudia M. Raiteri

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: galaxies: nuclei; galaxies: jets; galaxies: Seyfert; gamma-rays: general

Online: 15 July 2016 (11:29:08 CEST)

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Working Paper ARTICLE

Features of Structure and Absorption in the Jet-launching Region of M87

Wei Zhao, Xiaoyu Hong, Tao An, Xiaofeng Li, Xiaopeng Cheng, Fang Wu

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: galaxies: individual (m87); galaxies: jets; galaxies: active; radio continuum: galaxies

Online: 1 October 2019 (16:01:28 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202404.0363.v1

High–Redshift Quasars at z

z \geq 3

Yulia Sotnikova, Alexander Mikhailov, Timur Mufakharov, Tao An, Dmitry Kudryavtsev, Marat Mingaliev, Roman Udovitskiy, Anastasia Kudryashova, Vlad Stolyarov, Tamara Semenova

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: galaxies; active; galaxies; high-redshift; quasars; general; radio continuum; galaxies

Online: 4 April 2024 (10:08:42 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202404.0549.v1

The Schwarzschild-de Sitter Metric of Nonlocal dS Gravity

Ivan Dimitrijevic, Branko Dragovich, Zoran Rakic, Jelena Stankovic

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: nonlocal de Sitter gravity; Schwarzschild-de Sitter metric; rotation curves of spiral galaxies; dark matter and dark energy

Online: 8 April 2024 (16:04:15 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202210.0329.v2

4D Einstein--Gauss--Bonnet Gravity Coupled to Modified Logarithmic Nonlinear Electrodynamics

Sergey I. Kruglov

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: Einstein--Gauss--Bonnet gravity; nonlinear electrodynamics; thermodynamics; entropy; shadow; energy emission; quasinormal modes

Online: 4 January 2023 (12:37:29 CET)

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Preprint ARTICLE | doi:10.20944/preprints202307.1072.v1

Is PNP Theory Valid for a Black Hole Solution in Modified Gravity?

Surajit Das, Surajit Mandal

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: Massive particle; Static black hole; AdS Schwarzschild Yang-Mills black hole; Pseudo-Newtonian Potential; EGB gravity

Online: 17 July 2023 (10:08:56 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201607.0025.v1

Broad Band Observations Of Gravitationally Lensed Blazar QSO B0218+357 During A Gamma-Ray Outburst

Julian Sitarek, Josefa Becerra González, Sara Buson, Dijana Dominis Prester, Marina Manganaro, Daniel Mazin, Kari Nilsson, Mireia Nievas, Antonio Stamerra, Fabrizio Tavecchio, Ievgen Vovk

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: Gamma rays: galaxies; Gravitational lensing: strong; Galaxies: jets; Radiation mechanisms: non-thermal; Galaxies: individual: QSO B0218+357

Online: 13 July 2016 (05:36:15 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201607.0008.v1

Spectral and Polarization Signatures of Relativistic Shocks in Blazars

Markus Boettcher

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: active galaxies; blazars; jets; polarization; shock acceleration

Online: 8 July 2016 (03:03:04 CEST)

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Preprint REVIEW | doi:10.20944/preprints202311.0092.v1

The Alignment of Galaxies in Structures – Review

Włodzimierz Godłowski

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: orientation of galaxies; galaxies clusters; morphological types of galaxies

Online: 1 November 2023 (12:17:22 CET)

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Preprint ARTICLE | doi:10.20944/preprints202212.0284.v1

Galaxy Number Counts from the Sloan Digital Sky Survey

John Herbert Marr

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: galaxies: number counts; galaxies: evolution

Online: 15 December 2022 (14:53:09 CET)

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Preprint ARTICLE | doi:10.20944/preprints202008.0183.v1

The Hubble Tension: Change in Dark Energy or a Case for Modified Gravity?

Arun Kenath, Louise Rebecca, Sivaram C

Subject: Physical Sciences, Particle And Field Physics Keywords: hubble tension; modified gravity; dark energy; dark matter

Online: 7 August 2020 (10:08:19 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202403.1741.v1

Topology and Dynamics of Transcriptome (Dys)regulation

Michel Planat, David Chester

Subject: Biology And Life Sciences, Biochemistry And Molecular Biology Keywords: group theory; character variety; Painlevé equations; transcriptome; microRNAs; diseases; cancer research

Online: 28 March 2024 (10:18:13 CET)

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Preprint REVIEW | doi:10.20944/preprints202110.0402.v1

Jim Henry, Mesut Yurukcu, George Nnanna

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: Universe; galaxies; Milky Way Galaxy; spiral galaxies; hurricanes; pattern.

Online: 27 October 2021 (11:49:50 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202307.0284.v1

A Walk Through Agn Country—For the Somewhat Initiated!

Robert R. J. Antonucci

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: Astrophysics - Astrophysics of Galaxies; galaxies: active

Online: 5 July 2023 (11:09:01 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202104.0437.v1

Remarkable Spiral Galaxies in Dark Energy Survey Data Release 2

Michael J Longo

Subject: Physical Sciences, Acoustics Keywords: Galaxies; anomalies; dark matter; colliding galaxies

Online: 16 April 2021 (11:05:15 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202306.0877.v1

Investigating Possible Correlations Between Gamma-Ray and Optical Lightcurves for TeV-Detected Northern Blazars Over 8 Years of Observations

Atreya Acharyya, Alberto Sadun

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: BL Lacertae objects; general – galaxies; active – galaxies; jets – quasars; general

Online: 13 June 2023 (04:56:09 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202403.1861.v1

Stability Analysis and Dynamic Simulations for Gravity Gradient of a Large Rigid Space Structure

Chenglei Tang, Jialiang Sun, Dongping Jin

Subject: Engineering, Aerospace Engineering Keywords: Stability analysis; Gravity gradient; Large rigid space structure; Orbit dynamics; Natural coordinate formulation

Online: 29 March 2024 (13:45:30 CET)

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Preprint ARTICLE | doi:10.20944/preprints202402.1088.v1

Retarded Gravity in Disk Galaxies

Yuval Glas, Tomer Zimmerman, Asher Yahalom

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: Dark Matter; MOND; Retardation; General Relativity

Online: 20 February 2024 (11:28:30 CET)

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Preprint ARTICLE | doi:10.20944/preprints201703.0056.v1

Ag/MgAl₂O₄nanoparticles Prepared by a Modified Hydrothermal for Photocatalytic Degradation of Methylene Blue

Zhengru Zhu

Subject: Chemistry And Materials Science, Chemical Engineering Keywords: Ag/MgAl2O4; characterization; activity; Photocatalytic degradation; Methylene blue

Online: 10 March 2017 (10:37:46 CET)

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Preprint ARTICLE | doi:10.20944/preprints202402.1379.v1

Bt-modified transgenic rice shifted the composition and diversity of rhizosphere microbiota

Qi-Xing Huang, Yu-Liang Zhang, Yan-Hua Tan, Hua Kong, Yang Cao, Jun-Gang Wang, An-Ping Guo, Guohua Yin

Subject: Biology And Life Sciences, Food Science And Technology Keywords: genetically modified rice; microbial communities; 16S ribosomal RNA; transgenic Bt rice variety; operational taxonomic units

Online: 23 February 2024 (12:30:33 CET)

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Preprint ARTICLE | doi:10.20944/preprints202402.0939.v1

Structure and Luminescent Properties of Niobium Modified ZnO-B2O3:Eu3+ Glass

Reni Iordanova, Margarita Milanova, Aneliya Yordanova, Lyubomir Aleksandrov, Nikolay Nedylkov, Rosica Kukeva, Petia Petrova

Subject: Chemistry And Materials Science, Materials Science And Technology Keywords: glass structure; europium; IR; photoluminescence; density

Online: 19 February 2024 (11:48:45 CET)

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Preprint ARTICLE | doi:10.20944/preprints201607.0051.v1

Search for QPOs in the Light Curve of the Blazar OJ287: Preliminary Results from 2015/16 Observing Campaign

S. Zola, M. Valtonen, G. Bhatta, A. Goyal, B. Debski, A. Baran, J. Krzesinski, M. Siwak, S. Ciprini, A. Gopakumar, H. Jermak, K. Nilsson, D. Reichart, K. Matsumoto, K. Sadakane, K. Gazeas, M. Kidger, V. Piirola, F. Alicavus, K.S. Baliyan, A. Berdyugin, D. Boyd, M. Campas Torrent, F. Campos, J. Carrillo Gomez, D.B. Caton, V. Chavushyan, J. Dalessio, D. Dimitrov, M. Drozdz, A. Erdem, A. Escartin Perez, V. Fallah Ramazani, A.V. Filippenko, F. Garcia, F. Gomez Pinilla, M. Gopinathan, J.B. Haislip, J. Harmanen, G. Hurst, K.M. Ivarsen, M. Jelinek, A. Joshi, M. Kagitani, N. Kaur, N. Karaman, W.C. Keel, A.P. LaCluyze, B.C. Lee, E. Lindfors, J. Lozano De Haro, J.P. Moore, R. Naves Nogues, A.W. Neely, R.H. Nelson, W. Ogloza, S. Okano, J.C. Pandey, M. Perri, P. Pihajoki, G. Poyner, J. Provencal, T. Pursimo, A. Raj, R. Reinthal, S. Sadegi, T. Sakanoi, J.-L. Salto Gonzales, T. Schweyer, F.C. Soldan Alfaro, E. Sonbas, I. Steele, J.T. Stocke, J. Strobl, L.O. Takalo, T. Tomov, L. Tremosa Espasa, J.R. Valdes, J. Valero Perez, F. Verrecchia, J.R. Webb, M. Yoneda, M. Zejmo, W. Zheng, J. Telting, J. Saario, T. Reynolds, A. Kvammen, E. Gafton, R. Karjalainen, P. Blay

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: galaxies: active; BL Lacertae objects: individual (OJ 287); super massive black holes

Online: 18 July 2016 (10:46:26 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202404.1195.v1

Cholesterol-Modified Anti-Il6 siRNA Reduces the Severity of Acute Lung Injury in Mice

Ivan V. Chernikov, Irina K. Bachkova, Aleksandra V. Sen’kova, Mariya I. Meschaninova, Innokenty A. Savin, Valentin V. Vlassov, Marina A. Zenkova, Elena L Chernolovskaya

Subject: Biology And Life Sciences, Biochemistry And Molecular Biology Keywords: acute lung injury; inflammation; chemically modified siRNA; IL6; LPS

Online: 18 April 2024 (14:20:50 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202110.0129.v1

How Are Red and Blue Quasars Different? The Radio Properties

Victoria Anne Fawcett, David Alexander, David Rosario, Lizelke Klindt

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: Quasars; Galaxies; Radio; Supermassive Black-Holes

Online: 8 October 2021 (09:12:59 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202311.0823.v1

Hubble Diagram Test of SN1a Supernovae and High Redshift Gamma Ray Bursts: Data Analysis of the Log(z)/µ, ln(z+1)/T(d) and Linear Photon Flight Time T/(z+1) Scales. – Comparison of Observational Data with Model Calculations.

Laszlo Marosi

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: galaxies; distances and redshifts - galaxies; high-redshift - stars; gamma ray burst; general - cosmology; cosmological parameters

Online: 13 November 2023 (12:18:40 CET)

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Preprint ARTICLE | doi:10.20944/preprints202404.0936.v1

Is Ego a Motivator for Buying Local Foods? A Modified Model of the Theory of Trying

William Knapp, Thomas Schrier, Tianshu Zheng

Subject: Business, Economics And Management, Economics Keywords: Ego, Food Purchasing, Local Foods, Restaurant, Theory of Trying

Online: 15 April 2024 (09:21:14 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201908.0046.v1

The Discrepancy in Galaxy Rotation Curves

Roy Gomel, Tomer Zimmerman

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: dark matter; reference frames; galaxies

Online: 5 August 2019 (05:08:42 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202310.0368.v1

Gravity and Information II

Naman Kumar

Subject: Physical Sciences, Theoretical Physics Keywords: extra time dimension; holographic principle; thermodynamics and gravity.

Online: 7 October 2023 (09:48:34 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202307.1423.v1

Retarded Gravity and MOND

Asher Yahalom

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: General Relativity; MOND; Retardation; Weak Field Approximation

Online: 21 July 2023 (02:28:09 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201608.0189.v1

Promoting Effect of Inorganic Alkali on Carbon Dioxide Adsorption in Amine-Modified MCM-41

Yang Teng, Lijiao Li, Gang Xu, Kai Zhang, Kaixi Li

Subject: Chemistry And Materials Science, Physical Chemistry Keywords: amine-modified MCM-41; CO2 adsorption; inorganic alkali; alkali amounts

Online: 22 August 2016 (05:47:02 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202404.1059.v1

Advanced Voltametric Characterization of Polyphenols in Wine Using a Modified Carbon Paste Electrode with TiO₂ Nanoparticles

Saša Mićin, Nadica Ivošević DeNardis, Sanja Martinez, Vedrana Špada, Borislav N. Malinović

Subject: Chemistry And Materials Science, Electrochemistry Keywords: amperometric sensor; carbon electrode; polyphenols; TiO2 nanoparticles; voltammetry

Online: 16 April 2024 (15:45:13 CEST)

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Preprint REVIEW | doi:10.20944/preprints202305.0973.v2

The Andromeda Galaxy and its Star Formation History

Denis Leahy

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: spiral galaxies; star formation; galactic structure; galaxy formation

Online: 19 May 2023 (07:24:53 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202107.0054.v3

General Canonical Quantum Gravity Theory and that of the Universe and General Black Hole

C. Huang, Yong-Chang Huang, Xinfei Li

Subject: Physical Sciences, Particle And Field Physics Keywords: general relativity; Lagrangian; operators; quantum gravity; canonical quantization; commutation relation; general black hole

Online: 18 November 2021 (13:45:15 CET)

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Preprint ARTICLE | doi:10.20944/preprints201701.0137.v1

A Portable Live Cell Culture and Imaging System with Optional Umbilical Bioreactor Using a Modified Infant Incubator

Malcolm Brinn, Said F. Al-Sarawi, Tien-Fu Lu, Brian J. C. Freeman, Jaliya Kumaratilake, Maciej Henneberg

Subject: Biology And Life Sciences, Cell And Developmental Biology Keywords: cell culture; bioreactor; live cell imaging; tissue engineering

Online: 31 January 2017 (12:39:46 CET)

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Preprint ARTICLE | doi:10.20944/preprints201607.0044.v1

MWL Picture Of The Blazar S5 0716+714 During Its Brightest Outburst

Marina Manganaro, Giovanna Pedaletti, Marlene Doert, Denis Bastieri, Vandad Fallah Ramazani, Dario Gasparrini, Elina Lindfors, Benoit Lott, Mireia Nievas, Bindu Rani, Emmanouil Angelakis, George Borman, Mark Gurwell, Talvikki Hovatta, Ryosuke Itoh, Svetlana Jorstad, Alex Kraus, Thomas P Krichbaum, Paul Kuin, Anne Lahteenmaki, Valeri Larionov, Amy Yarleen Lien, Ioannis Myserlis, David J Thompson, Merja Tornikoski, J Anton Zensus

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: BL-Lacertae objects: individual: S5 0716+714; Galaxies:active; gamma-rays: galaxies

Online: 18 July 2016 (06:02:42 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202304.0137.v1

Solving the Problems of Dark Energy and the Hubble Constant Using Corrected Hubble’s Law

Askar Abdukadyrov

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: Galaxies; redshift; Hubble’s law; dark energy; Hubble constant

Online: 10 April 2023 (03:47:35 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202307.1276.v1

Multimessenger Studies of One Subclass of Active Galactic Nucleus: Blazar

Yu-Hai Yuan

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: galaxies; blazars; multi-messenger studies; generally

Online: 19 July 2023 (04:15:17 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202404.1207.v1

Coronary Computed Tomography Angiography - derived modified Duke index is associated with peri-coronary Fat Attenuation Index and predicts severity of coronary inflammation

Vasile-Bogdan Halațiu, Imre Benedek, Ioana-Patricia Rodean, Liliana-Oana Cojocariu, Theofana Mihăilă, Emanuel Blîndu, Aurelian Roșca, Botond - Barna Mátyás, Renata Gerculy, Florin Buicu, Theodora Benedek

Subject: Medicine And Pharmacology, Cardiac And Cardiovascular Systems Keywords: CariHeart; cardiac computed tomography; coronary stenosis; inflammation

Online: 18 April 2024 (14:03:31 CEST)

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Background: The modified Duke index derived from coronary computed tomography angiography (CCTA) was designed to predict cardiovascular outcomes based on the severity of coronary ste-nosis. However, it does not take into consideration the presence or severity of peri-coronary in-flammation. The peri-coronary fat attenuation index (FAI) is a novel imaging marker determined by CCTA which reflects the degree of inflammation in the coronary tree in patients with coronary artery disease. Purpose: To assess the association between the modified Duke index assessed by CCTA, cardiovascular risk factors and peri-coronary inflammation in the coronary arteries of pa-tients with coronary artery disease. Methods: One hundred seventy-two patients who underwent CCTA for typical angina were assigned into two groups based on the modified Duke index: group 1 – patients with low index ≤ 3 (n=107) and group 2 – patients with high index > 3 (n=65). Demo-graphic, clinical and CCTA data were collected for all patients, and FAI analysis of coronary in-flammation was performed. Results: Patients with increased values of the modified Duke index were significantly older compared to those with a low index (61.83 ± 9.89 vs. 64.78 ± 8.9; p = 0.002). No differences were found between the two groups in terms of gender distribution, hypertension, hypercholesterolemia or smoking history (all p > 0.5). The FAI score was significantly higher in patients from group 2, who presented a significantly higher score of inflammation compared to the patients in group 1, especially at the level of the right coronary artery (FAI score 20.85 ± 15.80 vs. 14.61 ± 16.66; p = 0.01 for the right coronary artery, 13.85 ± 8.04 vs. 10.91 ± 6.5; p = 0.01 for the circumflex artery, and 13.26 ±10.18 vs. 11.37 ± 8.84; p = 0.2 for the left anterior descending artery). CaRi-Heart® analysis identified a significantly higher risk of future events among patients with a high modified Duke index (34.84 % ± 25.86 % versus 16.87 % ± 15.80 %; p

Preprint ARTICLE | doi:10.20944/preprints201607.0023.v1

Observing---and Imaging---Active Galactic Nuclei with the Event Horizon Telescope

Vincent Fish, Kazunori Akiyama, Katherine Bouman, Andrew Chael, Michael Johnson, Sheperd Doeleman, Lindy Blackburn, John Wardle, William Freeman

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: galaxies: jets---Galaxy: center---techniques: high angular resolution---techniques: image processing---techniques: interferometric

Online: 12 July 2016 (09:41:39 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202207.0396.v1

Asymmetry in Galaxy Spin Directions -- Analysis of Data from DES and Comparison to Four Other Sky Surveys

Lior Shamir

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: Galaxies; Large-scale structure of Universe; Cosmic anisotropy

Online: 26 July 2022 (08:08:06 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202403.0289.v1

Gravity and the Riemannian Hypothesis

Junze Shi

Subject: Physical Sciences, Mathematical Physics Keywords: gravitation; Riemann hypothesis; Euler's formula

Online: 6 March 2024 (11:04:14 CET)

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Preprint ARTICLE | doi:10.20944/preprints202302.0427.v3

Gravity, Information and Accelerated Expansion

Naman Kumar

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: extra dimension; thermodynamics and gravity; accelerated expansion; universe-antiuniverse pair

Online: 11 September 2023 (05:00:26 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202404.0764.v1

Comparison of Trapping Efficacy of Locally Modified Gravid Aedes Trap and Autocidal Gravid Ovitrap for the Monitoring and Surveillance of Aedes aegypti Mosquitoes in Tanzania

Jane Johnson Machange, Masudi Suleiman Maasayi, John Mungi, Jason Moore, Joseph Barnabas Muganga, Olukayode G. Odufuwa, Sarah J. Moore, Frank Chelestino Tenywa

Subject: Biology And Life Sciences, Insect Science Keywords: Aedes aegypti; mosquito traps; vector control; Bio-Gents Sentinel trap; Gravid Aedes Trap; Autocidal Gravid Ovitrap; Tanzania

Online: 11 April 2024 (14:11:53 CEST)

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Preprint ESSAY | doi:10.20944/preprints202404.0608.v2

A Non-traditional Anti-gravity Method Is Theoretically Analyzed and Demonstrated and the Technical Realization Path Assumption

Shandong Zhao, Yijia Zhao

Subject: Physical Sciences, Applied Physics Keywords: gravitation; Centrifugal force; Gravity;

Online: 10 April 2024 (11:58:08 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202402.0564.v1

Modified Power Law Cosmology: Theoretical Scenarios and Observational Constraints

Lokesh Kumar Sharma, Suresh Parekh, Kalyani C.K. Mehta, Maxim Yu. Khlopov, Saibal Ray, Anil Kumar Yadav

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: MCMC; cosmological parameters; Power Law; Observational constraints; Om Diagnostics; cosmography

Online: 9 February 2024 (13:24:41 CET)

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Preprint ARTICLE | doi:10.20944/preprints201607.0032.v1

The radio/gamma-ray connection from 120 MHz to 230 GHz

Marcello Giroletti, Filippo D'Ammando, Monica Orienti, Rocco Lico

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: BL Lacertae objects: general, catalogues, gamma rays: galaxies, quasars: general, radiation mechanisms: non-thermal, radio continuum: galaxies

Online: 14 July 2016 (12:11:50 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202306.0242.v1

On Semiclassical Gravity and Horizon Area

Naman Kumar

Subject: Physical Sciences, Theoretical Physics Keywords: Semiclassical Gravity; Generalized Entropy; Quantum Expansion; Thermody-namics of Causal Horizon; Non-equilibrium Thermodynamics of Spacetime

Online: 5 June 2023 (05:12:57 CEST)

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Preprint BRIEF REPORT | doi:10.20944/preprints202208.0464.v2

SMBH Relativistic Gravity and Dark Matter

Štefan Čelan, Amrit Sorli, Niko Gorjup

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: kinetic energy of rotating SMBH; gravity; dark matter

Online: 29 August 2022 (15:42:06 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201804.0345.v1

Stochastic Gravity and Ontological Quantum Mechanics

Thomas C Andersen

Subject: Physical Sciences, Quantum Science And Technology Keywords: quantum gravity; emergent quantum mechanics; gravitational waves, general relativity

Online: 27 April 2018 (04:58:59 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201710.0191.v1

Effelsberg Monitoring of a Sample of RadioAstron Blazars

Jun Liu, Thomas P. Krichbaum, Xiang Liu, Alex Kraus, Hayley Bignall, Yuri Y. Kovalev, Kirill V. Sokolovsky, J. Anton Zensus

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: galaxies; active -- method; statistical -- radio continuum; ISM

Online: 31 October 2017 (04:18:48 CET)

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Preprint ARTICLE | doi:10.20944/preprints201608.0076.v1

Electrochemical Behavior and Determination of Chlorogenic Acid Based on Carbon Nanotubes Modified Screen-Printed Electrode

Xiao-Yan Ma, Hong-Qiao Yang, Hua-Bing Xiong, Xiao-Fen Li, Jing-Ting Gao, Yun-Tao Gao

Subject: Chemistry And Materials Science, Analytical Chemistry Keywords: Chlorogenic acid; screen-printed electrode; carbon nanotubes

Online: 8 August 2016 (12:07:57 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202306.1472.v5

General Quantum Gravity: Quantum Einstein Field Equation from (3 + 1)D Quantum Mechanics & Extra Eleven Dimensions within (3 + 1)D Quantum State Spaces

Shashwata Vadurie

Subject: Physical Sciences, Particle And Field Physics Keywords: Quantum Gravity; Quantum state spaces; Quantum geometry; Dimension Theory

Online: 26 December 2023 (09:58:36 CET)

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Preprint REVIEW | doi:10.20944/preprints202305.1410.v1

Towards quantum gravity

Sergey Kruglov

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: quantum gravity; diffeomorphism-invariant; Wheeler--DeWitt equation; first order formalism

Online: 19 May 2023 (08:29:33 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201610.0013.v1

Analysis of Drought Characteristics using Time Series of Modified SPEI in South Korea from 1981 to 2010

Seungjong Bae, Sang-Hyun Lee, Seung-Hwan Yoo, Taegon Kim

Subject: Engineering, Civil Engineering Keywords: drought; SPEI; evapotranspiration; Thornthwaite; FAO Penman-Monteith

Online: 6 October 2016 (13:04:49 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202309.1558.v1

Relative Orderings of Modified Proportional Hazard Rates and Modified Proportional Reversed Hazard Rates Models

Mansour Shrahili, Mohamed Kayid, Mhamed Mesfioui

Subject: Computer Science And Mathematics, Probability And Statistics Keywords: proportional hazard rates, proportional reversed hazard rates, relative hazard rate order; relative reversed hazard rate order; stochastic order; relative aging

Online: 22 September 2023 (11:24:39 CEST)

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Working Paper ARTICLE

Fakeons, Quantum Gravity and the Correspondence Principle

Damiano Anselmi

Subject: Physical Sciences, Particle And Field Physics Keywords: classicization; correspondence principle; fakeons; philosophy of science; quantization; quantum gravity

Online: 27 November 2019 (03:17:49 CET)

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Working Paper ARTICLE

Rethinking the Foundation of Physics and its Relation to Quantum Gravity and Quantum Probabilities: Unification of Gravity and Quantum Mechanics

Espen Haug

Subject: Physical Sciences, Acoustics Keywords: quantum mechanics; quantum probability; de Broglie wavelength; Compton wavelength; gravity; quantum gravity

Online: 24 December 2020 (11:45:05 CET)

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In this paper we will show that standard physics to a large degree consists of derivatives of a deeper reality. This means standard physics is both overly complex and also incomplete. Modern physics has typically started from working with first understanding the surface of the world, that is typically the macroscopic world, and then forming theories about the atomic and subatomic world. And we did not have much of a choice, as the subatomic world is very hard to observe directly, if not impossible to observe directly at the deepest level. Despite the enormous success of modern physics, it is therefore no big surprise that we at some point have possibly taken a step in the wrong direction. We will claim that one such step came when one thought that the de Broglie wavelength represented a real matter wavelength. We will claim that the Compton wavelength is the real matter wavelength. Based on such a view we will see that many equations in modern physics are only derivatives of much simpler relations. Second, we will claim that in today’s physics one uses two different mass definitions, one mass definition that is complete or at least more complete, embedded in gravity equations without being aware of it, as it is concealed in GM, and the standard, but incomplete, kg mass definition in non-gravitational physics. First, when this is understood, and one uses the more complete mass definition that is embedded in gravity physics, not only in gravity physics, but in all of physics, then one has a chance to unify gravity and quantum mechanics. Our new theory shows that most physical phenomena when observed over a very short timescale are probabilistic for masses smaller than a Planck mass and dominated by determinism at or above Planck mass size. Our findings have many implications. For example, we show that the Heisenberg uncertainty principle is rooted in a foundation not valid for rest-mass particles, so the Heisenberg uncertainty principle can say nothing about rest-masses. When re-formulated based on a foundation compatible with a new momentum that is also compatible with rest-masses, we obtain a re-defined Heisenberg principle that seems to become a certainty principle in the special case of a Planck mass particle. Furthermore, we show that the Planck mass particle is linked to gravity and that we can easily detect the Planck scale from gravity observations. The Planck mass particle is unique as it only lasts the Planck time, and in that very short time period it can only be observed directly from itself, and it therefore closely linked to absolute rest.

Preprint ARTICLE | doi:10.20944/preprints202012.0614.v1

Modified Sumudu Transform and Its Properties

Ugur Duran

Subject: Computer Science And Mathematics, Applied Mathematics Keywords: Gamma function, Sumudu transform, Laplace transform, convolution

Online: 24 December 2020 (09:45:36 CET)

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Preprint REVIEW | doi:10.20944/preprints201811.0081.v1

Halo Concentrations and the Fundamental Plane of Galaxy Clusters

Yutaka Fujita, Stefano Ettori, Megan Donahue, Keiichi Umetsu, Elena Rasia, Massimo Meneghetti, Elinor Medezinski, Nobuhiro Okabe, Marc Postman

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: galaxies; clusters; general—cosmology; theory—darkmatter—large-scale structure of universe

Online: 5 November 2018 (03:43:57 CET)

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Preprint ARTICLE | doi:10.20944/preprints202311.0134.v1

How Long Can the Spiral Arms of Disc Galaxies Be Optically Observed?

Hongjun Pan

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: Spiral arms; spiral pattern rotation; evolution; spiral galaxies

Online: 2 November 2023 (10:34:43 CET)

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Preprint REVIEW | doi:10.20944/preprints201811.0030.v1

Radio Galaxies - The TeV Challenge

Bindu Rani

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: active galactic nuclei; radio galaxies; gamma-rays; jets

Online: 2 November 2018 (07:07:11 CET)

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Preprint ARTICLE | doi:10.20944/preprints202110.0082.v6

Information Theory of Gravity

Jeffrey Alloy Abanto

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: emergent gravity; MOND; modified newtonian gravity; dark matter

Online: 20 October 2023 (11:53:20 CEST)

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Preprint CONCEPT PAPER | doi:10.20944/preprints202011.0413.v1

Quantum Web of Gravity

Eugene Machusky

Subject: Physical Sciences, Acoustics Keywords: Quantum metrics; Quantum Information processing; Informational entropy.

Online: 16 November 2020 (11:09:51 CET)

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Preprint ARTICLE | doi:10.20944/preprints201708.0041.v4

The Granularity of Gravity

Engel Roza

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: entropic gravity; Cosmological Constant; quantum gravity; dark matter

Online: 2 November 2017 (14:39:13 CET)

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Preprint ARTICLE | doi:10.20944/preprints202004.0368.v8

Timeless State of Gravity: Possible Solution for Cosmological Constant problem

Ahmed Farag Ali

Subject: Physical Sciences, Theoretical Physics Keywords: gravity; hidden variables; information loss problem; completeness, cosmological constant problem

Online: 6 May 2020 (15:43:39 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202312.2306.v2

Ethylene-Di-Amine Modified β-Cyclodextrin Catalyzed Green Synthesis of Pyrimidones and Its In Silico Study against ESBL E. coli Receptor

Manojkumar Rajapriyan, Mohammed M. Alanazi, R Imran Khan, Ajmal R. Bhat, Syed Ali Padusha M, Sarkar M. A. Kawsar, Javed Masood Khan, Ayyiliath M Sajith

Subject: Medicine And Pharmacology, Medicine And Pharmacology Keywords: Ethylene-di-amine modified β -CD; Multicomponent reaction; 3,4-dihydropyrimidin-2(1H)-ones DHPM derivatives; Solvent-free conditions; Reusability

Online: 2 April 2024 (10:58:54 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201802.0141.v1

Hyperbolic Tangent Ansatz Method to Space Time Fractional Modified KdV, Modified EW and Benney–Luke Equations

Ozlem Ersoy Hepson

Subject: Computer Science And Mathematics, Mathematics Keywords: Ansatz method; fractional modified Korteweg–de Vries Equation; fractional modified Equal Width Equation; fractional Benney–Luke Equation; Conformable fractional derivative

Online: 22 February 2018 (10:45:02 CET)

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Preprint COMMUNICATION | doi:10.20944/preprints202304.0068.v1

Preliminary Data : Feeding and Colon Cancer Growth. Modified Nitrogen Intake Leads to Blunted Cancer Growth Independently by Serine

Giovanni Corsetti, Claudia Romano, Tiziano Scarabelli, Carol Chen-Scarabelli, Evasio Pasini, And Francesco S Dioguardi

Subject: Biology And Life Sciences, Life Sciences Keywords: cancer; amino acids; colon; nitrogen; diet; mice

Online: 5 April 2023 (15:45:18 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202401.0720.v1

A Unified Relativistic Theory of Electromagnetism and Gravity

Yaakov Friedman, Tzvi Scarr

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: Unification; Relativity of spacetime; Extended Principle of Inertia; Geometrization of spacetime; Local scaling function of curved spacetime; Four-potential of a field; Tensor of a field; Relativistic dynamics; Superposition in gravitation

Online: 9 January 2024 (12:21:54 CET)

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Preprint ARTICLE | doi:10.20944/preprints202306.2002.v1

Rastall Gravity and the Impact of Particle Creation

Binaya Kumar Bishi, Pratik Vijay Lepse, Aroonkumar Beesham

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: FLRW metric; Rastall gravity; particle creation

Online: 29 June 2023 (08:13:29 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201911.0134.v1

Implications and Applications of Fermi Scale Quantum Gravity

U.V.S. Seshavatharam, S. Lakshminarayana

Subject: Physical Sciences, Nuclear And High Energy Physics Keywords: four gravitational constants; compound reduced Planck’s constant; nuclear elementary charge; strong coupling constant; nuclear stability and binding energy; quark masses

Online: 12 November 2019 (16:53:07 CET)

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Preprint ARTICLE | doi:10.20944/preprints201904.0119.v1

Evolutionary Physical Constants in Einstein's Field Equations and the Redshift

Rajendra P. Gupta

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: cosmology theory; cosmological parameters; galaxies; distances and redshifts; variable physical constants; VSL

Online: 10 April 2019 (08:25:53 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202010.0586.v2

The Effects of Inertial Forces on the Dynamics of Disk Galaxies

Tomer Zimmerman, Roy Gomel

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: reference systems; galaxies: kinematics and dynamics; cosmology: dark matter

Online: 24 May 2021 (10:15:05 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202008.0274.v1

Intrinsic Nature of Dark Matter in the Galactic Halo

UGUR CAMCI

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: galaxies: modified gravity; dark matter; halos; flat rotation curves

Online: 12 August 2020 (08:05:22 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201903.0107.v1

On the Dynamics of Rotationally Supported Galaxies

Ramzi Suleiman

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: Dark matter; galaxies; galaxy rotation curve; radial acceleration relation.

Online: 8 March 2019 (09:58:33 CET)

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Preprint ARTICLE | doi:10.20944/preprints201812.0147.v2

Modelling the Rising Tails of Galaxy Rotation Curves

Fan Zhang

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: Dark matter; galaxies; gravitation; rotation curves; galaxy rotation period

Online: 29 January 2019 (09:24:48 CET)

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Preprint ARTICLE | doi:10.20944/preprints201612.0057.v1

Using the Outskirts of Galaxy Clusters to Determine their Mass Accretion Rate

Cristiano De Boni

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: galaxies; clusters; general; methods N-body simulations; cosmology; theory

Online: 9 December 2016 (16:38:17 CET)

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Preprint ARTICLE | doi:10.20944/preprints201607.0034.v1

Flaring γ-ray emission from high redshift blazars

Monica Orienti, Filippo D'Ammando, Marcello Giroletti, Justin Finke, Daniele Dallacasa

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: galaxies: active; gamma-rays: general; radiation mechanisms: non-thermal

Online: 15 July 2016 (04:40:29 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202012.0775.v1

Quintessence Model Calculations for Bulkviscous Fluid and Low Value Predictions of Thecoefficient of Bulk Viscosity in General as Well as Modified Gravity With the Form F(R,T)=R+F(T) and F(T)=λT.

SHOUVIK SADHUKHAN, ALOKANANDA KAR

Subject: Physical Sciences, Acoustics Keywords: Modified Gravity; Fluid mechanics; Quintessence model; cosmological inflation; Viscosity; Gravitational physics.

Online: 31 December 2020 (09:15:43 CET)

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Preprint ARTICLE | doi:10.20944/preprints202105.0110.v1

Lensing Effects in Retarded Gravity

Asher Yahalom

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: spacetime symmetry; relativity of spacetime; retardation; lensing

Online: 6 May 2021 (15:28:22 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202403.0154.v1

MgAl Oxide Coatings Modified with CeO2 Particles Formed by Plasma Electrolytic Oxidation of AZ31 Magnesium Alloy: Photoluminescent and Photocatalytic Properties

Stevan Stojadinović, Nenad Radić

Subject: Chemistry And Materials Science, Materials Science And Technology Keywords: plasma electrolytic oxidation; photocatalysis; photoluminescence, MgO, MgAl2O4, methyl orange

Online: 6 March 2024 (04:01:23 CET)

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Preprint ARTICLE | doi:10.20944/preprints201607.0038.v1

Exploring The Magnetic Field Configuration Close To The Central Engines Using GMVA

Bindu Rani, Thomas Krichbaum, J. Hodgson, Shoko Koyama, Anton J. Zensus, Alan Marscher, Svetlana Jorstad, Lars Fuhramnn

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: active galaxies; BL Lacertae object: BL Lac; jets; GMVA: high-resolution VLBI; magnetic field; polarization

Online: 15 July 2016 (10:06:48 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202307.1791.v1

Super Strong Gravitational Field and New Theory of Gravity

yin zhu

Subject: Physical Sciences, Theoretical Physics Keywords: Gravitational field; New theory of gravity; Orbit; Graviton-photon interaction

Online: 26 July 2023 (09:47:43 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202109.0462.v1

Renormalizable and Unitary Lorentz Invariant Model of Quantum Gravity

S. A. Larin

Subject: Physical Sciences, Particle And Field Physics Keywords: modified theories of gravity; renormalizability; unitarity; astrophysical and cosmological scales

Online: 28 September 2021 (10:39:47 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201905.0357.v1

Collision Space-Time. Unified Quantum Gravity. Gravity is Lorentz Symmetry Break Down at the Planck Scale

Espen Haug

Subject: Physical Sciences, Quantum Science And Technology Keywords: Quantum gravity, granular matter, Lorentz symmetry break down at the Planck scale, Heisen- berg uncertainty break down at the Planck scale, indivisible particles, gravity and Lorentz symmetry break down.

Online: 29 May 2019 (16:31:56 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202404.1247.v1

Beta-Cyclodextrin Molecules (β‐CD) Modified PVDF Membranes to Remove Multi-Ionic Dye Solutions using Steric, Inclusion, and Dielectric Exclusion

Wadha Alrashedi, Hafedh Ben KOCHKAR, Ismail Ercan

Subject: Chemistry And Materials Science, Biomaterials Keywords: β ‐cyclodextrin; hydrophilicity; PVDF membrane; Dye separation; dielectric exclusion

Online: 18 April 2024 (14:07:48 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201608.0013.v1

Potential Application of Modified α-Mangostin Xanthones from Garcinia mangostana as Antibacterial Agents in Food Packaging

Srinivasan Narasimhan, Shanmugam Maheshwaran, Palmiro Poltronieri, Imad A. Abu-Yousef, Amin F. Majdalawieh, Janarthanam Rethavathi, Prince Edwin Das

Subject: Chemistry And Materials Science, Medicinal Chemistry Keywords: α-mangostin; antibacterial; antifungal; food packaging; semi-synthetic modification

Online: 2 August 2016 (09:02:09 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201612.0004.v2

The Modified Kudryashov Method for the Conformable Time Fractional (3+1)-dimensional Kadomtsev-Petviashvili and the Modified Kawahara Equations

Alper Korkmaz

Subject: Physical Sciences, Mathematical Physics Keywords: conformable time fractional (3+1)-dimensional Kadomtsev-Petviashvili equation; conformable time fractional modified Kawahara equation; modified Kudryashov method; wave solution

Online: 5 December 2016 (10:31:30 CET)

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Preprint ARTICLE | doi:10.20944/preprints202403.1768.v1

Pilot Testing of Useful Tools Validity for Frailty Assessment in Greece: Translated PRISMA-7 Tool, Modified Fried Criteria and Clinical Frailty Scale

George Soulis, Efstathia Kyriakopoulou, Aristea Leventouri, Eleni Zigkiri, Vasiliki Efthymiou, Zikos Kentros, Anastasia Koutsouri

Subject: Public Health And Healthcare, Primary Health Care Keywords: Frailty; Greek Translation of PRISMA-7; Modified Fried criteria; Greek version of Clinical Frailty Scale

Online: 28 March 2024 (12:12:26 CET)

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The importance of frailty in older people is getting constant recognition as an important aspect both in terms of public health, as well in personal level for the appropriate management of an older person health condition. This is reflected by the continuously increasing number of research studies carried out in several settings across different countries. Sometimes this is very solid, but in other cases there is a considerable gap in terms of accurate and well grounded documentation of frailty status. This is the case in Greece, where we are missing clinically validated tools to approach frailty. We are missing frailty screening tools, such as for instance PRISMA 7, the gold standard tool of Fried criteria is somehow problematic since the question referring to physical activity originates from a questionnaire that has not been translated and validated, while Clinical Frailty Scale has been validated for the translation but not for the capacity to detect frailty. Aim of this study is to validate these tools for their accuracy to detect frailty by using a measurable index of frailty, previously proposed for use in clinical studies: the Short Physical Performance Battery (SPPB). 74 male and female participants have been evaluated for their frailty status using different tools. We observed that PRISMA 7 translation detects frailty only when one question is removed at a cut-off of ≥ 2 and indicated a sensitivity of 88.1%, and specificity of 99.9% with a good correlation with SPPB measurements (r = 0.858; p < 0.001). When CFS was validated using SPPB it demonstrated a very good correlation (r = -0.838; p < 0.001 respectively) as it was the case for the modified Fried Criteria (r = -0.725; p < 0.001). All items demonstrated a good correlation between them. We can here propose that we can accurately assess frailty status in the community setting by using a modified version of Fried criteria, Clinical Frailty Scale translation in Greek and we can screen for frailty by using the Greek translation of PRISMA 7 only after removing the item 6 of the questionnaire.

Preprint ARTICLE | doi:10.20944/preprints202312.0850.v2

A Renormalizable Model of Quantum Gravity

John Ashmead

Subject: Physical Sciences, Theoretical Physics Keywords: quantum gravity,time, quantum mechanics, quantum electrodynamics

Online: 4 March 2024 (09:34:17 CET)

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Preprint ARTICLE | doi:10.20944/preprints202311.1535.v2

Energy -Momentum Localization in Quantum Gravity

Stuart Marongwe

Subject: Physical Sciences, Theoretical Physics Keywords: Quantum Gravity; Energy-Momentum Localization; Dark Energy; Dark Matter; Gravitational Waves; Black Holes

Online: 28 November 2023 (10:26:48 CET)

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Preprint ARTICLE | doi:10.20944/preprints202306.0815.v1

The Virial Theorem for Retarded Gravity

Asher Yahalom

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: General Relativity; Retardation; Coma cluster; virial theorem

Online: 12 June 2023 (10:00:02 CEST)

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The general theory of relativity (GR) is symmetric under smooth coordinate transformations also known as diffeomorphisms. The general coordinate transformation group has a linear subgroup denoted the Lorentz group of symmetry which is maintained also in the weak field approximation to GR. The dominant operator in the weak field equation of GR is thus the d'Alembert (wave) operator which has a retarded potential solution. Galaxy Clusters are huge physical systems having dimensions of many hundreds of millions of light years. Thus any change at the cluster center will be noticed at the rim only hundreds of millions of years later. Those retardation effects are neglected in present day cluster modelling and in particular are neglected in virial calculations used to relate mass and velocities on the cluster. The significant differences between the predictions of Newtonian instantaneous action at a distance and observed velocities are usually explained by either assuming dark matter or by modifying the laws of gravity (MOND). In this paper we will show that taking general relativity seriously without neglecting retardation effects one can explain the velocities in a galactic cluster without postulating dark matter. It should be stressed that the current approach does not require that velocities, $v$ are high, in fact the vast majority of cluster bodies are substantially subluminal. In other words, the ratio of $\frac{v}{c} \ll 1$. Typical velocities in galaxies are less than ~1000 km/s, which makes this ratio $0.01$ or smaller. However, one should consider the fact that every gravitational system even if it is made of subluminal bodies has a retardation distance, beyond which the retardation effect cannot be neglected. Every natural system such as stars and galaxies and even galactic clusters exchange mass with its environment. For example, the sun losses mass through the solar wind and galaxies accrete gas from the intergalactic medium. This means that all natural gravitational systems have a finite retardation distance. The question is thus quantitative, how large is the retardation distance? The change of mass of the sun is quite small and thus the retardation distance of the solar system is quite large allowing us to neglect retardation effects within the solar system. However, for galaxies and galaxy clusters the retardation distance is within the system itself and cannot be neglected.

Preprint REVIEW | doi:10.20944/preprints202102.0371.v1

Gravity, Where Does It Come From?

Ahmed Isam

Subject: Physical Sciences, Acoustics Keywords: Theory of relativity; Gravitational field; Light medium; String theory; Rest motion

Online: 17 February 2021 (10:15:50 CET)

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