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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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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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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 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/preprints201607.0026.v1

Microscopic Processes In Global Relativistic Jets Containing Helical Magnetic Fields

Kenichi Nishikawa, Yosuke Mizuno, Jacek Niemiec, Oleh Kobzar, Martin Pohl, Jose Gomez, Ioana Dutan, Asaf Pe’er, Jacob Frederiksen, Aake Nordlund, Athina Meli, Helene Sol, Phil Hardee, Dieter Hartmann

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: relativistic jets; particle-in-cell simulations; global jets; helical magnetic fields; kinetic instabilities; kink instability

Online: 13 July 2016 (05:37:49 CEST)

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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/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/preprints202011.0581.v1

The Quantum Mechanism of AGNs’ Jets

Amrit Šorli, Štefan Čelan

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: space-time singularities; energy density of quantum vacuum; AGN; jets

Online: 23 November 2020 (11:15:15 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/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 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/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/preprints202408.1138.v1

Compartmental Description of the Cosmological Baryonic Matter Cycle. I. Competition of Spontaneous Star Formation, Stellar Feedback and Stellar Evolution

Reinhard Schlickeiser, Martin Kröger

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: galaxies: evolution, stars: formation, ISM: evolution, cosmology: theory, physical processes

Online: 15 August 2024 (10:42:42 CEST)

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Context: The compartmental description, well-known from the description of infection diseases and epidemics, is applied to describe the temporal evolution of the baryonic matter in interstellar gas and stars. The introduction of gaseous and stellar fractions of the total baryonic matter as the basic dynamical variables is advantageous because it allows to apply the description to a variety of astrophysical systems. Aims: The competition of spontaneous star formation, stellar feedback and stellar evolution is theoretically investigated to understand the baryonic matter cycle including luminous baryonic matter in main-sequence stars and weakly luminous matter in white dwarfs, neutron stars and black holes (referred to as locked-in matter). Of particular interest is the understanding of the cosmic star formation history and the present-day gas fraction with compartmental models. Methods: For stationary rates of spontaneous star formation, continuous stellar feedback and stellar evolution exact analytical solutions of the time evolution of the fractions of gaseous, luminous stellar and locked-in stellar matter are derived. The accuracy of the analytical solutions is proven by the favorite comparison with the exact numerical solutions of the dynamical equations. Results: The observed cosmological star formation rate and the integrated stellar density as a function of redshift are reasonably well explained by the compartmental model without triggered star formation by the competition of spontaneous star formation and stellar evolution whereas the influence of stellar feedback is less important. The action of stellar evolution provides a significant redshift dependent reduction factor when calculating the integrated stellar density from the star formation rate. Without stellar evolution the observations cannot be reproduced very well. Then the fits to the observation allow us conclusions on the relative importance of spontaneous star formation, stellar evolution and feedback in the early universe after the recombination era until today. The gas, luminous star and locked-in stellar matter fractions indicate that the vast majority of the baryons in the present-day universe resides in the form of locked-in stellar matter in white dwarfs, neutron stars and black holes.

Preprint ARTICLE | doi:10.20944/preprints201810.0200.v2

Control of Laminar Boundary-Layer Separation Using Steady and Harmonic Vortex Generator Jets

Aria Alimi, Olaf Wünsch

Subject: Engineering, Mechanical Engineering Keywords: laminar separation; flow control; vortex generator jets

Online: 29 October 2018 (11:55:12 CET)

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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.v2

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 May 2024 (09:09:04 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202009.0738.v1

Eulerian and Lagrangian Comparison of Primary and Secondary Wind Jets in the Tokar Gap Region

Larry Pratt, E. Jason Albright, Irina Rypina, Houshuo Jiang

Subject: Physical Sciences, Acoustics Keywords: coastal wind jets; Red Sea; Lagrangian pathways; hydraulics; dust storms; hydraulic jumps

Online: 30 September 2020 (10:41:43 CEST)

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The Lagrangian and Eulerian structure and dynamics of a strong wind event in the Tokar Gap region are described using a WRF model hindcast for 2008. Winds in the Tokar Gap reach 25 m s-1 and remain coherent as a jet far out over the Red Sea, whereas equally strong wind jets occurring in neighboring gaps are attenuated abruptly by a jump-like hydraulic transition that occur just offshore of the Sudan coast. The transition is made possible by the supercritical nature of the jets, which are fed by air that spills down from passes at relatively high elevation. By contrast, the spilling flow in the ravine-like Tokar Gap does not become substantially supercritical and therefore does not undergo a jump, and also carries more total horizontal momentum. The Tokar Wind Jet carries some air parcels across the Red Sea and into Saudi Arabia, whereas air parcel trajectories in the neighboring jets ascend as they cross through the jumps, then veer sharply to the southeast and do not cross the Red Sea. The mountain parameter Nh/U is estimated to lie in the rage 1.0-4.0 for the general region, a result roughly consistent with a primary gap jet having a long extension, and supercritical jets spilling down from higher elevation passes. The strong event is marked by the formation of a cyclonic cell near the upstream entrance to the Tokar Gap, a feature absent from the more moderate events that occur throughout the summer. The cell contains descending air parcels that are fed into the primary and secondary jets. An analysis of the Bernoulli function along air parcel trajectories reveals an approximate balance between the loss of potential energy and gain of internal energy and pressure, with surprisingly little contribution from kinetic energy, along the path of the descending flow. All jets attain the critical wind speed nominally required to loft dust into the atmosphere, though only the Tokar Gap has a broad, delta region with plentiful deposits of silt.

Preprint ARTICLE | doi:10.20944/preprints201808.0047.v1

CFD Analysis of Twin Turbulent Impinging Axisymmetric Jets at Different Impingement Angles

Raj Narayan Gopalakrishnan, Peter J Disimile

Subject: Engineering, Mechanical Engineering Keywords: Reynolds-averaged Navier–Stokes (RANS); round jets; turbulence model; impinging jets; SST k-omega model

Online: 2 August 2018 (10:47:24 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202109.0323.v6

The Morphology of the Active Galactic Nucleus and its Impact on Accretion Flows and Relativistic Jets

Mohammed Al-Fadhli

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: Relativistic Jets; Conformal Space-time Background.

Online: 12 January 2023 (13:50:25 CET)

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The G2 gas cloud motion data and the scarcity of observations on the event horizon-scale distances have challenged the comprehensiveness of the central supermassive black hole model. In addition, the Planck Legacy 2018 release has preferred a positively curved early Universe with a confidence level higher than 99%. This study investigates the impact of the background curvature and its evolution over the conformal time on the formation and morphological evolution of central compact objects and the consequent effect on their host galaxies. The formation of a galaxy from the collapse of a supermassive gas cloud in the early Universe is modeled based on interaction field equations as a 4D relativistic cloud-world that flows and spins through a 4D conformal bulk of a primordial positive curvature considering the preference of the Planck release. Owing to the curved background, this scenario of galaxy formation reveals that the core of the galaxy undergoes a forced vortex formation with a central event horizon leading to opposite vortices (traversable wormholes) that spatially shrink while evolving in the conformal time. It indicates that the galaxy and its core are formed in the same process whereas the surrounding gas clouds form the spiral arms due to the frame-dragging induced by the fast-rotating core. It demonstrates that the accretion flow onto the central supermassive compact object only occurs at the central event horizon of the two opposite vortices while their other ends eject the relativistic jets. This can elucidate the relativistic jet formation and explain the G2 gas cloud motion if its orbit is around one of the vortices but at a distance from the central event horizon. The gravitational potential of the early curved bulk could contribute to galaxy formation while the present spatial flatness deprives the potential of bulk which could lead to galaxy quenching. The formation of a galaxy and its core simultaneously could explain the growth of the supermassive compact galaxy core to a mass of ~10⁹ M_⊙ at just 6% of the current Universe age.

Preprint ARTICLE | doi:10.20944/preprints202312.0886.v1

Re-examination of Penrose’s Space-Time Singularity and the Origin of Protons in Astrophysical Jets

Srecko Šorli

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: space-time singularity, astrophysical jets, energy density of superfluid space

Online: 12 December 2023 (11:21:49 CET)

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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/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/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 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/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/preprints202012.0231.v1

Enhancing Photocatalytic Activity of ZnO Nanoparticles in a Circulating Fluidized Bed with Plasma Jets

Shiwei Ma, Yunyun Huang, Ruoyu Hong, Xuesong Lu, Jianhua Li

Subject: Chemistry And Materials Science, Chemical Engineering Keywords: Plasma, zinc oxide, photocatalysis, nanomaterials.

Online: 9 December 2020 (15:51:59 CET)

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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/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/preprints201607.0044.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/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/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/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/preprints202106.0512.v1

A Study of RANS Turbulence Models in Fully Turbulent Jets: A Perspective for CFD-DEM Simulations

Dustin Steven Weaver, Sanja Mišković

Subject: Engineering, Control And Systems Engineering Keywords: Jet Flow; CFD; Turbulence; CFD-DEM

Online: 21 June 2021 (12:52:10 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202311.0134.v2

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 evolution; rigid spiral arms; soft spiral arms; spiral galaxies

Online: 3 July 2024 (07:34:16 CEST)

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With the galaxy J101652.52 as a model galaxy, this paper studied on the temporal duration of optically observed spiral patterns in disc galaxies is based on the finite reservoir of hydrogen available without replenishment following the initial formation of these well-isolated galaxies. The galaxy J101652.52 exhibits a grand design spiral pattern of two wide open spiral arms with perfect central symmetry, has only rear side trail effect, which clearly indicates that there is no corotation circle, therefore, the Density wave theory proposed for the spiral arm formation may not be applicable in this galaxy. The results reveal a gradual decline in observable spiral arms regardless of any spiral arm formation mechanism. This reduction occurs after half-loop rotation (as defined in the paper) as hydrogen reserves deplete, hindering new star formation. Ultimately, spiral patterns may possibly become optically invisible at normal conditions after a full-loop rotation (as defined in the paper) with hydrogen depletion, even if the formation mechanism remains active. The spiral galaxies with spiral arms decoupled from galactic bars or having soft spiral structures shall have similar results as long as that the spiral pattern rotation speed is significant different from the galactic matter rotation speed. Most of observed spiral galaxies have soft spiral structures, their spiral patterns dynamically change constantly. The results of this study support the idea of short-lived spiral patterns compared to the lifespan of the spiral galaxies. The spiral arm formation may occur once like the onetime firework show in a galaxy’s life based on the limited availability of hydrogens. A concise, universally applicable mechanism for spiral arm formation across various galaxies should exist which provides a single mathematical formula to describe the broad range of morphologies of the spiral arms with few adjustable parameters. Some exceptions may be explained within this framework. Furthermore, the observed data on spiral pattern and galactic bar rotation speeds in the Milky Way require rigorous verification, particularly concerning the winding problem.

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 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 REVIEW | doi:10.20944/preprints201811.0374.v2

Relativistic Jet Simulations of the Weibel Instability in the Slab Model to Cylindrical Jets with Helical Magnetic Fields

Ken-Ichi Nishikawa, Yosuke Mizuno, Jose l. Gomez, Ioana Dutan, Athina Meli, Jacek Niemiec, Oleh Kobzar, Martin Pohl, Helen Sol, Nicholas MacDonald, Dieter H. Hartmann

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: particle-in-cell simulations; relativistic jets; the Weibel instability; kink-like instability; mushroom instability; global jets; helical magnetic fields; recollimation shocks

Online: 25 December 2018 (09:01:18 CET)

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Preprint ARTICLE | doi:10.20944/preprints202406.1194.v1

SS 433: Flares and L2 Overflow, Spirals in the Wind

Michael Bowler

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: X-rays: binaries: ULX; stars: binaries: SS 433; galaxies: stellar content: microquasar

Online: 18 June 2024 (08:16:00 CEST)

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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/preprints201910.0375.v2

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 galaxies; dark matter

Online: 27 September 2020 (10:41:40 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/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/preprints202202.0229.v1

The Scale Invariant Vacuum Paradigm: Main Results and Current Progress

Vesselin Gueorguiev, Andre Maeder

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: cosmology: theory - dark matter - dark energy - inflation; galaxies: formation - rotation; Weyl Integrable Geometry; Dirac co-calculus

Online: 18 February 2022 (09:22:34 CET)

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Preprint REVIEW | doi:10.20944/preprints202311.1815.v1

The Scale Invariant Vacuum Paradigm: Main Results and Current Progress Review (Part II)

Vesselin G. Gueorguiev, Andre Maeder

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: cosmology: theory; dark matter; dark energy; inflation; galaxies: formation; rotation; weyl integrable geometry; dirac co-calculus

Online: 30 November 2023 (02:00:32 CET)

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Preprint ARTICLE | doi:10.20944/preprints202306.0201.v2

Spiral Arm Formation of Galaxies Through ROTASE Mechanism Is Perfectly Demonstrated by Falling Rockets Venting Fuel

Hongjun Pan

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: Spiral arms; Spiral galaxies; X-matter; Black holes; Galaxy evolution; Spirals by rockets

Online: 30 June 2023 (11:38:13 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201703.0115.v1

Towards a More Well-Founded Cosmology

Hartmut Traunmüller

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: foundations of science; cosmology: observations; cosmology: theory; galaxies: kinematics and dynamics; inertia; MoND

Online: 16 March 2017 (09:31:27 CET)

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Working Paper REVIEW

Rotating Disk Galaxies without Dark Matter Based on Scientific Reasoning

James Feng

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: disk galaxies; galactic rotation; Newtonian dynamics; rotation curve; dark matter; mass-to-light ratio

Online: 13 November 2019 (02:37:48 CET)

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Preprint ARTICLE | doi:10.20944/preprints202311.1673.v1

Quaternion Algebra on 4D Spacetime: The Lorentz Gauge Is a Door to the Invisible World of Dark Matter and Dark Energy

Valeriy Sbitnev

Subject: Physical Sciences, Mathematical Physics Keywords: Navier-Stokes equation; vorticity equation; ; toroidal vortex; irrotational velocity; solenoidal velocity; spiral galaxies; dark matter; dark energy

Online: 27 November 2023 (07:48:01 CET)

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Preprint ARTICLE | doi:10.20944/preprints202005.0400.v1

What is the Real Shape of the Hubble Diagram, z = H₀*D or z+1= e^H0*t? Analysis of the SN1a Supernovae and Gamma Ray Burst Redshift/Magnitude Data including the High Redshift Range up to z = 8.1

Laszlo Marosi

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: galaxies; distances and redshift; high redshift; stars; Gamma ray bursts; individual; supernovae; individual; cosmology; distance scale; observations

Online: 24 May 2020 (19:07:56 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202301.0211.v2

The Upgraded Planck System of Units that Reaches from the Known Planck Scale All the Way Down to Subatomic Scales

Dimitris M. Christodoulou, Demosthenes Kazanas

Subject: Physical Sciences, Particle And Field Physics Keywords: Atomic processes; Cosmological parameters; Cosmology: theory; Early Universe; Elementary particles; Galaxies: kinematics and dynamics; Gravitation.

Online: 27 February 2023 (02:04:10 CET)

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Natural systems of units $\{U_i\}$ need to be overhauled to include the dimensionless coupling constants $\{\upalpha_{U_i}\}$ of the natural forces. Otherwise, they cannot quantify all forces of nature in a unified manner. Thus, each force must furnish a system of units with at least one dimensional and one dimensionless constant. We revisit three natural systems of units (atomic, cosmological, and Planck). The Planck system is easier to rectify, and we do so in this work. The atomic system discounts $\{ G, \upalpha_G \}$, thus it cannot account for gravitation. The cosmological system discounts $\{ \slashed{h}, \upalpha_\slashed{h} \}$, thus it cannot account for quantum physics. Here, the symbols have their usual meanings; in particular, $\upalpha_G$ is the gravitational coupling constant and $\upalpha_\slashed{h}$ is Dirac's fine-structure constant. The speed of light $c$ and the impedance of free space $Z_0$ are resistive properties imposed by the vacuum itself, thus they must be present in all systems of units. The upgraded Planck system with fundamental units $${\rm UPS} \,:=\,\{ c, Z_0, G, \upalpha_G, \slashed{h}, \upalpha_\slashed{h}, \,\dots\,\!\},$$ describes all physical scales in the universe---it is nature's system of units. As such, it reveals a number of properties, most of which have been encountered previously in seemingly disjoint parts of physics, and some of which have been designated as mere coincidences. Based on the UPS results, that relate (sub)atomic scales to the Planck scale and the fine-structure constant to the Higgs field, we can state with confidence that no observed/measured physical properties are coincidental in this universe. Furthermore, we derive from first principles Koide's $K=2/3$ enigmatic constant and additional analogous quark and vector boson constants. These are formal mathematical proofs that justify a posteriori the use of geometric means in deriving the quark/boson mass ladder. This ladder allows us to also calculate the Higgs couplings to the vector bosons and the Weinberg angle in terms of only $K$.

Preprint ARTICLE | doi:10.20944/preprints201703.0009.v1

Gaussian Processes for Blazar Variability Studies

Vassilis Karamanavis

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: active galaxies; blazars; jets; radio continuum; gamma-rays; time-series analysis; Bayesian modelling; Gaussian processes

Online: 1 March 2017 (12:56:13 CET)

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Preprint ARTICLE | doi:10.20944/preprints201904.0105.v1

Weighing Cosmological Models with SNe Ia and GRB Redshift Data

Rajendra P. Gupta

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: galaxies; supernovae; GRB; distances and redshifts; cosmic microwave background radiation; distance scale; cosmology theory; cosmological constant; Hubble constant; general relativity; TMT

Online: 9 April 2019 (11:38:12 CEST)

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Many models have been proposed to explain the intergalactic redshift using different observational data and different criteria for the goodness-of-fit of a model to the data. The purpose of this paper is to examine several suggested models using the same supernovae Ia data and gamma-ray burst (GRB) data with the same goodness-of-fit criterion and weigh them against the standard

Λ

CDM model. We have used the redshift – distance modulus (

z - μ

) data for 580 supernovae Ia with

0.015 \leq z \leq 1.414

to determine the parameters for each model, and then use these model parameter to see how each model fits the sole SNe Ia data at

z = 1.914

and the GRB data up to

z = 8.1

. For the goodness-of-fit criterion, we have used the chi-square probability determined from the weighted least square sum through non-linear regression fit to the data relative to the values predicted by each model. We find that the standard ΛCDM model gives the highest chi-square probability in all cases albeit with a rather small margin over the next best model - the recently introduced nonadiabatic Einstein de Sitter model. We have made (

z - μ

) projections up to

z = 1096

for the best four models. The best two models differ in

μ

only by 0.328 at

z = 1096

, a tiny fraction of the measurement errors that are in the high redshift datasets.

Preprint REVIEW | doi:10.20944/preprints202105.0487.v1

M87 Supermassive Black Hole Review

Mekhala Ganguly

Subject: Physical Sciences, Acoustics Keywords: black hole; supermassive black hole; black hole physics; M87 galaxies; gravitation; Event Horizon; telescope; observational astronomy

Online: 20 May 2021 (11:45:25 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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Working Paper ARTICLE

Study of Periodic Signals from Blazars

Gopal Bhatta

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: supermassive black holes: non-thermal radiation; active galactic nuclei: BL Lacertae objects; galaxies: jets; method: time series analysis

Online: 4 December 2019 (04:32:15 CET)

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Preprint ARTICLE | doi:10.20944/preprints201809.0283.v1

Detection of Periodic Radio Signal from the Blazar J1043+2408

Gopal Bhatta

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: supermassive black holes: non-thermal radiation; active galactic nuclei: BL lacertae objects: individual: J1043+2408; galaxies: jets; method: time series analysis

Online: 17 September 2018 (06:00:08 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202012.0703.v5

On the Fundamental Particles and Reactions of Nature

Jian-Bin Bao, Nicholas P. Bao

Subject: Physical Sciences, Quantum Science And Technology Keywords: aether; hypoatom; neutrino; inflation; gravity; negative pressure; dark energy; dark matter; black hole; spinning universe; quantum mechanics; first galaxies; spin-1/2 particle; matter-antimatter asymmetry; baryogenesis-through-leptogenesis; fabric of space; conformal cyclic cosmology; center of the universe; fate of the universe; general theory of relativity; parity non-conservation in weak interactions

Online: 4 January 2023 (02:26:55 CET)

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Preprint ARTICLE | doi:10.20944/preprints202407.1815.v1

An Integrated Approach Based on Clinical Data Together with Metabolites and Biomarkers for the Assessment of the Postoperative Complications after Cardiac Surgery

Peter Meinarovich, Alisa Pautova, Evgenii Zuev, Ekaterina Sorokina, Ekaterina Chernevskaya, Natalia Beloborodova

Subject: Medicine And Pharmacology, Cardiac And Cardiovascular Systems Keywords: aromatic microbial metabolites; sepsis-associated metabolites; 4-hydroxyphenyllactic acid; prognostic models; SOFA

Online: 23 July 2024 (16:04:39 CEST)

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Background: Early diagnosis of postoperative complications is an urgent task, allowing timely prescribing of appropriate therapy and reducing the cost of patient treatment. Prognostic models based on various data could help in the early diagnosis of postoperative complications after cardiac surgery. Objectives: The purpose of the study was to determine whether an integrated approach based on clinical data along with metabolites and biomarkers had greater predictive value than the models built on less data. Methods: The study included patients (n=62) admitted for planned cardiac surgery (coronary artery bypass grafting with cardiopulmonary bypass), who were retrospectively divided into two groups depending on the presence (n=26) or absence (n=36) of postoperative complications of all types. Clinical and laboratory data on the first day after surgery were analyzed. Additionally, patients' blood samples were collected before and on the first day after surgery to determine biomarkers (interleukin-6, procalcitonin, NT-proBNP, high-sensitivity troponin T) and metabolites (8 aromatic and 2 dicarboxylic acids were detected using gas chromatography-mass spectrometry). Results: Patients before surgery, compared with healthy donors, differed in the concentration of metabolites (p < 0.05), and had concentrations of a number of biomarkers exceeding the corresponding reference values. Multivariate PLS-DA models, predicting the presence or absence of postoperative complications, were built using clinical data (ROC-AUC=0.71), concentrations of metabolites and biomarkers (ROC-AUC=0.60), and the entire data set (ROC-AUC=0.75). For comparison we built univariate models using the EuroScore2 (ROC-AUC=0.59) and SOFA (ROC-AUC=0.76) scales; concentrations of lactate (ROC-AUC=0.71), the dynamic changes of 4-hydroxyphenyllactic acid (ROC-AUC=0.69), and the sum of three sepsis-associated metabolites (ROC-AUC=0.70). The proposed complex model using entire data set was comparable to the SOFA scale, which confirms the expediency of searching for new predictive models based on a variety of factors.

Preprint REVIEW | doi:10.20944/preprints202406.0540.v1

Whey as an Optimal Substrate for the Development of Functional Products Enriched with Bioactive Peptides

Margarita Saubenova, Yelena Oleinikova, Alexander Rapoport, Sviatoslav Maksimovich, Zhanerke Yermekbay, Elana Khamedova

Subject: Biology And Life Sciences, Food Science And Technology Keywords: functional products; peptides, whey; fermentation; lactic acid bacteria; proteolytic activity.

Online: 10 June 2024 (08:49:28 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202404.1023.v1

A Contribution to the Integration of International, National and Local Cultural Heritage Protection through a Multilevel Approach to Planning: A Case Study of the Djerdap Area

Ana Niković, Božidar Manić, Nataša Čolić Marković, Nikola Krunić

Subject: Environmental And Earth Sciences, Environmental Science Keywords: Djerdap; Danube; spatial plan; protected area; cultural heritage; multilevel approach

Online: 16 April 2024 (10:27:34 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202406.1356.v1

Impact of Southerly Surge on Rainfall Pattern Over Java, Bali, West Nusa Tenggara and East Nusa Tenggara during Asian Winter Monsoon and Its Relationship to MJO Condition

Trismidianto Trismidianto, Didi Satiadi, Wendi Harjupa, Ibnu Fathrio, Risyanto Risyanto, Elfira Saufina, Robi Muharsyah, Danang Eko Nuryanto, Fadli Nauval, Dita Fatria Andarini, Anis Purwaningsih, Teguh Harjana, Alfan Sukmana Praja, Adi Witono, Ina Juaeni, Bambang Suhandi

Subject: Environmental And Earth Sciences, Atmospheric Science And Meteorology Keywords: Southerly Surge; MJO; Rainfall; Java Island; East Nusa Tenggara

Online: 19 June 2024 (14:10:02 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202405.1950.v1

A Lightweight and High-Precision Passion Fruit YOLO Detection Model for Deployment in Embedded Devices

Qiyan Sun, Pengbo Li, Chentao He, QiMing Song, Zhicong Luo

Subject: Engineering, Electrical And Electronic Engineering Keywords: passion fruit detection; lightweight; deep learning; knowledge distillation; embedded devices

Online: 29 May 2024 (14:12:09 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202404.1484.v1

Assessment of SLAM Scanner Accuracy for Outdoor and Indoor Surveying Tasks

Zahra Gharineiat, Fayez Tarsha Kurdi, Krish Henny, Hamish Gray, Aaron Jamieson, Nicholas Reeves

Subject: Environmental And Earth Sciences, Remote Sensing Keywords: SLAM; LiDAR; accuracy assessment; indoor and outdoor; data acquisition

Online: 23 April 2024 (11:59:07 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202407.2202.v1

CSA-SA-CRTNN: A Dual-Stream Adaptive Convolutional Cyclic Hybrid Network Combining Attention Mechanisms for EEG Emotion Recognition

Ren Qian, Xin Xiong, Jianhua Zhou, Hongde Yu, Kaiwen Sha

Subject: Biology And Life Sciences, Behavioral Sciences Keywords: EEG; emotion recognition; attention mechanism; Dual-Stream model; adaptive; hybrid network

Online: 29 July 2024 (10:43:31 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202404.0276.v1

Methylation-GC-MS/FID-Based Glycosidic Linkage Analysis of Unfractionated Polysaccharides in Red Seaweeds

Barinder Bajwa, Xiaohui Xing, Stephanie A. Terry, Robert J. Gruninger, D. Wade Abbott

Subject: Chemistry And Materials Science, Analytical Chemistry Keywords: methylation analysis; reductive hydrolysis; whole food fiber; whole cell wall; anhydro sugar; agarose; carrageenan; sulfated galactan; mixed linkage xylan; principal component analysis

Online: 3 April 2024 (10:33:21 CEST)

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Preprint BRIEF REPORT | doi:10.20944/preprints202402.1644.v2

The Impact of an Online Sleep Education Program (Sleep 101) on Sleep Hygiene and Sleep Behavior in College Students

Johanna Schmickler, Rebecca Robbins, Pallas Snider Ziporyn, Stuart Quan

Subject: Public Health And Healthcare, Public, Environmental And Occupational Health Keywords: sleep hygiene; sleep behavior; college students; sleep education program

Online: 6 March 2024 (04:49:17 CET)

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Preprint ARTICLE | doi:10.20944/preprints202404.0476.v1

Metabolomics on Apple (Malus domestica) Cuticle—Search for Authenticity Markers

Kamila Bechynska, Jiri Sedlak, Leos Uttl, Vit Kosek, Petra Vackova, Vladimir Kocourek, Jana Hajslova

Subject: Chemistry And Materials Science, Food Chemistry Keywords: Malus domestica; apple cuticle; UHPLC-HRMS/MS; metabolomic fingerprints; classification models; markers; wax esters

Online: 8 April 2024 (03:04:51 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202406.1783.v1

Quantitative Trait Loci Mapping and Candidate Gene Analysis for Fiber Quality Traits in Upland Cotton

Xiaoyun Jia, Hongxia Zhao, Jijie Zhu, Hantao Wang, Shijie Wang, Miao Li, Guoyin Wang

Subject: Biology And Life Sciences, Agricultural Science And Agronomy Keywords: upland cotton; fiber quality; QTL mapping; candidate gene; qRT-PCR

Online: 25 June 2024 (15:12:46 CEST)

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Superior fiber quality is one of the most important objectives in cotton breeding. To detect the genetic basis underlying fiber quality, an F2 population containing 413 plants was constructed by crossing Jifeng 914 and Jifeng 173, both of which have superior fiber quality, with Jifeng 173 being better. Five fiber quality traits were investigated in the F2, F2:3, F2:4, and F2:5 populations. Quantitative trait loci (QTL) mapping was conducted based on a high-density genetic map containing 11,488 single nucleotide polymorphisms (SNPs) and spanning 4,202.12 cM in length. Transgressive segregation patterns and complex correlations in the five tested traits were observed. A total of 108 QTLs were found, including 27 for fiber length (FL), 16 for fiber strength (FS), 24 for micronaire (MC), 17 for fiber uniformity (FU), and 24 for fiber elongation rate (FE). Chromosome A7 contained 12 QTL, ranking the first. No QTL was found on chromosome D1 and D11. Each QTL contributed 1.98%–21.45% to the phenotypic variation (PV), including 13 major effect QTLs that contributed more than 10% toward PV. Two QTLs could be repeatedly detected in three populations, including qFL-D3-2 in F2, F2:4, and F2:5 with 9.18%–21.45% of PV, qFS-A11-1 in F2:3, F2:4 and F2:5 with 6.05%–10.41% of PV. Another seven stable QTLs could be detected in two populations, including four major effect QTLs: qFL-A12-3, qFS-D10-2, qMC-D6-2, and qMC-D8-1. Fourteen QTL-overlapping regions were found, which might explain the complex correlations among the five phenotypic traits. Four regions on chromosome A11, D3, D6, and D10 covered by both stable and major effect QTLs are promising for further fine mapping. The genomic regions of the two QTLs detected in three populations and the four major effect QTLs contain 810 genes. Gene functional analysis revealed that the annotated genes are mainly involved in protein binding and metabolic pathways. Fifteen candidate genes in the qFL-D3-2 region are highly expressed in fiber or ovules during fiber initiation, elongation, secondary cell wall thickening, or maturation stages. qRT-PCR revealed that Ghir_D03G005440.1 and Ghir_D03G011310.1 may play a role in promoting fiber initiation, Ghir_D03G006470.1 may be beneficial for promoting fiber elongation. This study provides more information for revealing the molecular genetic basis underlying cotton fiber quality.

Preprint ARTICLE | doi:10.20944/preprints202404.1916.v1

Yolo-Chili: An Efficient Lightweight Network Model for Localization of Pepper Picking in Complex Environments

HaiLin Chen, Ruofan Zhang, Jialiang Peng, Hao Peng, Wenwu Hu, Yi Wang, Ping Jiang

Subject: Computer Science And Mathematics, Artificial Intelligence And Machine Learning Keywords: Chili Detection,Automatic Picking,Neural Network,Model Compression

Online: 29 April 2024 (11:14:53 CEST)

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Preprint COMMUNICATION | doi:10.20944/preprints202404.0793.v1

GreenTray^®, a TIS Bioreactor for Plant Micropropagation and Abiotic or Biotic Stress Bioassays

Ramon Dolcet-Sanjuan, Maria Casanovas, Sandra Franquesa, Eva Alsina, Francisca Carrasco-Cuello, Estanis Torres, Josep Rufat, Cristina Solsona, Neus Teixido

Subject: Biology And Life Sciences, Plant Sciences Keywords: GreenTray®; ; TIS; bioreactor; micropropagation; Biotic and Abiotic Stress Agents Bioassays; Prunus; Pyrus; Malus; Cannabis

Online: 11 April 2024 (11:12:04 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202409.0498.v1

Treatment of the Fractures of the Humeral Surgical Neck: MIROS versus Intramedullary Nailing. A Retrospective Study

Michelangelo Palco, Gabriele Giuca, Domenico Fenga, Ilaria Sanzarello, Matteo Nanni, Danilo Leonetti

Subject: Medicine And Pharmacology, Orthopedics And Sports Medicine Keywords: Proximal Humerus Fractures; MIROS System; Intramedullary Nailing; Orthopedics; Retrospective Study

Online: 6 September 2024 (09:42:59 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202407.0234.v1

Asymmetric Convolution Guided Multipath Fusion Real-Time Semantic Segmentation Networks

Jie Liu, Bing Zhao, Ming Tian

Subject: Computer Science And Mathematics, Artificial Intelligence And Machine Learning Keywords: Semantic segmentation; Asymmetric convolution; Feature misalignment; High-level semantic information

Online: 3 July 2024 (00:20:55 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202408.0656.v1

Artificial Cultivation of Aquatic Plants Promotes Nitrogen Transformation and Key Functional Genes in Agricultural Drainage Ditch Sediments in the Yellow River Irrigation Area, China

Yu Hong, Ziqi He, Ruliang Liu, Wenhua Xiang, Pifeng Lei, Xi Fang

Subject: Environmental And Earth Sciences, Ecology Keywords: denitrification; DNRA; functional gene of nitrogen transformation; rhizosphere sediments; Phragmites australis; Typha orientalis

Online: 12 August 2024 (03:16:00 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202402.0656.v1

Biocontrol Potential of Trichoderma asperellum CMT10 Against Strawberry Root Rot Disease

Ping Liu, Rui Xian Yang, Zu Hua Wang, Yin Hao Ma, Wei Guang Ren, Dao Wei Wei, Wen Yu Ye

Subject: Biology And Life Sciences, Horticulture Keywords: Strawberry root rot; Trichoderma asperellum; biocontrol mechanism; biocontrol efficacy; growth-promoting effect

Online: 14 February 2024 (03:51:50 CET)

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Strawberry root rot caused by Neopestalotiopsis clavispora is one of the main diseases of strawberry and significantly impacts the yield and quality of strawberry fruit. There are now no effective control techniques available except for fungicide sprays, which may directly impact consumers. Biological control is becoming an alternative method for the control of plant diseases to replace or decrease the application of traditional synthetic chemical fungicides. Trichoderma is widely used as a biological agent for controlling strawberry root rot. In order to provide resources for screening the highly effective biocontrol fungus for controlling strawberry root rot caused by Neopestalotiopsis clavispora, the biocontrol mechanism,the control effects of Trichoderma asperellum CMT10 against strawberry root rot and growth-promoting effects on strawberry seedlings were investigated by plate culture, microscopy observation and root drenching methods.The results showed that CMT10 had obvious competitive, antibiotic and hyperparasitism effects on Neopestalotiopsis clavispora CMGF3. The CMT10 could quickly occupy nutritional space, and the inhibition rates of CMT10 against CMGF3 in confrontation culture on 7 d was 65.49%. The inhibition rates of volatile metabolite and fermentation metabolite produced by CMT10 against CMGF3 were 79.67% and 69.84%, respectively. The mycelium of strain CMT10 can act as hyperparasites by making contacting, winding and penetrating hyphae of CMGF3. Pot experiment showed that the biocontrol efficacy of CMT10 on strawberry root rot caused by Neopestalotiopsis clavispora was 63.00%. CMT10 had obvious promotion effect on strawberry growth, the plant height, root length, total fresh weight, root fresh weight, stem fresh weight and root dry weight, with the promotion rates were 20.09%, 22.39%, 87.11%, 101.58%, 79.82% and 72.33%, respectively. Overall, this study showed the ability of Trichoderma asperellum CMT10 to control strawberry root rot and their potential to develop as novel biocontrol agents to replace chemical fungicides for eco-friendly, sustainable agriculture.

Preprint ARTICLE | doi:10.20944/preprints202407.0539.v1

Global Exponential Stability of Impulsive Delayed Neural Networks with Parameter Uncertainties and Reaction-Diffusion Terms

Fei Luo, Weiyi Hu, Enli Wu, Xiufang Yuan

Subject: Computer Science And Mathematics, Computer Networks And Communications Keywords: Reaction diffusion terms; Uncertainty parameters; Impulse; Time-varying delays; Global exponential stability

Online: 5 July 2024 (13:21:21 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202406.1024.v1

Screen and Character a New Iflavirus Virus in the Fruit Tree Pest Pyrops candelaria

Hong Lin, Weitao Song, Dongmei Ma, Chi Yang, Yanfang Yao, Renyi Liu, Ling Hao, Dandan Wu, Shihua Wang, Jimou Jiang, Jun Xiong, Rui Ma, Jiajing Xiao, Zhenhong Zhuang

Subject: Biology And Life Sciences, Insect Science Keywords: Iflavirus; Pyrops candelaria; virus; insect; distribution

Online: 14 June 2024 (16:08:03 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202403.0789.v1

Molecular Identification and Prevalence of the Mite Carpoglyphus lactis (Acarina: Carpoglyphidae) in Apis mellifera in the Republic of Korea

Thi-Thu Nguyen, Mi-Sun Yoo, Hyang-Sim Lee, So Youn Youn, Se-Ji Lee, Su-Kyoung Seo, Jaemyung Kim, Yun Sang Cho

Subject: Biology And Life Sciences, Animal Science, Veterinary Science And Zoology Keywords: Apis mellifera; Carpoglyphus lactis; Cytochrome c oxidase subunit 1 (COI) gene; Molecular identification; Republic of Korea

Online: 13 March 2024 (16:10:18 CET)

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Preprint ARTICLE | doi:10.20944/preprints202409.1655.v1

Under Normoxia Simvastatin Shifts Lipid Metabolism of B16.F10 Melanoma Cells to Support Their Aggressiveness

Giorgiana Gabriela Negrea, Loredana Balacescu, Alina Sesarman, Manuela Banciu

Subject: Biology And Life Sciences, Biochemistry And Molecular Biology Keywords: simvastatin; normoxia; hipoxia inducible factor 1; transcriptomics; unsaturated fatty acids; prostaglandins

Online: 23 September 2024 (08:45:31 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201608.0203.v1

Molecular Cloning and Expression Analysis of COX II from Sitophilus zeamais, a Potential Action Site of AITC

Changliang Hou, Jingbo Wang, Hua Wu, Jiayu Liu, Zhiqing Ma, Juntao Feng, Xing Zhang

Subject: Biology And Life Sciences, Insect Science Keywords: Sitophilus zeamais; COXⅡ; Soluble proteins; Enzyme activity; AITC

Online: 25 August 2016 (10:11:13 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202408.0130.v1

Interaction Solutions for the Fractional KdVSKR Equations in (1+1)-Dimension and (2+1)-Dimension

Lihua Zhang, Zitong Zheng, Bo Shen, Gangwei Wang, Zhenli Wang

Subject: Physical Sciences, Mathematical Physics Keywords: Korteweg-de Vries Sawada-Kotera-Ramani (KdVSKR) equation; extended Korteweg-deVries (KdV) equation; Sawada-Kotera (SK) equation; finite symmetry groups; Lie symmetry; exact solutions; consistent Riccati expansion (CRE); Hirota bilinear method; fractional derivatives

Online: 2 August 2024 (06:04:29 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202407.0181.v1

Sustainable E-commerce: Blockchain and Channel Structure in Online Retail Platforms

Xunbo Wu, Wenqi Jiang, Lingjie Meng

Subject: Business, Economics And Management, Business And Management Keywords: sustainable E-commerce; blockchain technology; channel structure; online retail platform; counterfeit mitigation

Online: 2 July 2024 (05:27:17 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202409.1359.v1

Anti-Herpetic Activity of Killer Peptide (KP): An In Vitro Study

Arianna Sala, Francesco Ricchi, Laura Giovati, Stefania Conti, Tecla Ciociola, Claudio Cermelli

Subject: Medicine And Pharmacology, Epidemiology And Infectious Diseases Keywords: Antimicrobial peptides; HSV-1; HSV-2; antivirals; Killer Peptide (KP)

Online: 19 September 2024 (08:45:59 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201610.0008.v3

Properties of the long-term oscillations in the middle atmosphere based on observations from TIMED/SABER

Yiyao Zhang, Shudao Zhou, Hanqing Shi, Zheng Sheng, Weilai Shi, Huadong Du, Zhiqiang Fan

Subject: Environmental And Earth Sciences, Atmospheric Science And Meteorology Keywords: AO; SAO; TO; amplitude; phase

Online: 6 October 2016 (08:52:44 CEST)

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Preprint REVIEW | doi:10.20944/preprints202407.1028.v1

Biomaterials in Drug Delivery and Clinical Applications

Nadia Islam, Aiša Galijatović, Selma Kozarić, Adna Hrapović, Ajla Tipura, Boris Kovalenko, Maida Hajdarpašić, Asmaa Al Bourghli, Haris Lokvančić, Abas Sezer, Alaa A. Aljabali, Murtaza M. Tambuwala, Altijana Hromić-Jahjefendić, Vladimir N. Uversky

Subject: Biology And Life Sciences, Biology And Biotechnology Keywords: biomaterials; drug delivery; clinical applications; ethics

Online: 15 July 2024 (10:48:08 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202404.1918.v1

A Novel Image Compression Method Based on Coordinated Group Signal Transformation

Ekaterina Lopukhova, Grigory Voronkov, Igor Kuznetsov, Vladislav Ivanov, Ruslan Kutluyarov, Elizaveta Grakhova

Subject: Engineering, Telecommunications Keywords: energy-efficient coding; differential coding; coordinated group signal transformation; image compression; image quality criteria; neural networks

Online: 30 April 2024 (11:30:43 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202407.2152.v1

Bottom Crack Detection with Real-Time Signal Amplitude Correction Using EMAT-PEC Composite Sensor

Yizhou Guo, Yu Hu, Kai Wang, Yini Song, Bo Feng, Yihua Kang, Zhaoqi Duan

Subject: Engineering, Electrical And Electronic Engineering Keywords: bottom crack; lift-off; EMAT; PEC; amplitude correction; signal fusion

Online: 26 July 2024 (10:21:41 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202406.1592.v1

New Physically-Based Mathematical Model and Experiments for a Recently Invented Solar Pot

Márton Rátkai, Gábor Géczi, Richárd Kicsiny, László Székely

Subject: Engineering, Mechanical Engineering Keywords: solar cooking; solar pot; mathematical modelling; simulation results; measurements

Online: 24 June 2024 (08:16:07 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201612.0148.v1

Systemic Analysis of Certified Artisan Cheese Production for Improvement—The Case of the Serra da Estrela PDO Cheese

Denis A. Coelho, Tiago E. P. Carrola, Ana F. Couvinhas

Subject: Engineering, Industrial And Manufacturing Engineering Keywords: process improvement; ewe’s cheese; systemic design

Online: 30 December 2016 (07:34:54 CET)

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The research reported on this paper was aimed at improving the overall efficiency of a PDO certified artisanal cheese production process. Being a PDO certified foodstuff by the EU, it is considered to have properties and qualities determined by the geographical environment in which is made, with its production taking place in a specific and determined geographical location, in this case the Serra da Estrela region. In that sense, the authors conducted a mapping according to a systemic perspective of the processes involved in the context of manufacturing and distribution of certified Serra da Estrela cheese. Numerous methods were used throughout the process, such as a systemic design analysis, and techniques derived from ethnographic methods, which led to the collection of data in the field and consequently provided the immersion of the researcher in genuine work situations. Critical points were identified and emphasized in the systemic map with the purpose of encouraging initiatives to address and overcome the gaps and inefficiencies detected. The systemic design analysis triggered the development of design work. Observations following an ethnographic approach identified ergonomic risks in cheese making during the process of cutting excess chips, fostering the emergence of musculoskeletal disorders at the wrist. A tool that fits best to the task at hand was developed. A prototype of the new tool enabled collecting feedback from use in the work context, in order to inform product development. The domains of agricultural production and microbiology, considering the specific microorganisms developed trough the ripening process of the cheese, turned out to be aspects of high importance for the issue under focus, contributing to a broader understanding of the ripening process and its risks, simultaneously improving the efficiency and success of cheese production. If it were not for the systemic analysis, which served as a link between the boundaries of distinct domains such as the risk of microorganism contamination, ergonomics, energy efficiency, legislation and regulation policies, transportation challenges and economic viability, approached throughout the research. Simultaneously creating bridges between them, the various problems might not have been detected in the first place, as they are usually addressed in specialized disciplines, predetermined by the restrictions of each specific area of knowledge. As a consequence of the development of this research, which was based on an analysis that sought to establish possible connections between various disciplines and tried to constantly maintain a holistic perspective, making new connections and observing the issues from a new angle, apart from the already established methodologies. All this allowed to lay out the seeds for the development of a plan to tackle the critical points identified by the systemic analysis reported in this paper.

Preprint ARTICLE | doi:10.20944/preprints202407.0826.v1

Potential Regulation of Iron Metabolism Gene Expression by DOF Transcription Factors in Dendrocalamus latiflorus

Peng-Kai Zhu, Mei-Xia Lin, Mei-Yin Zeng, Yu Tang, Xin-Rui Li, Tian-You He, Yu-Shan Zheng, Ling-Yan Chen

Subject: Biology And Life Sciences, Plant Sciences Keywords: DOF transcription factors; Iron Metabolism Related Genes; gene regulation; gene expression; Dendrocalamus latiflorus

Online: 10 July 2024 (10:14:31 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202409.1850.v1

Induction and Characteristics of Medicinal Plant Tussilago farfara L. in Callus Culture

Monika Bojko, Magdalena Kędra, Agata Adamska, Zuzanna Jakubowska, Monika Tuleja, Beata Mysliwa-Kurdziel

Subject: Biology And Life Sciences, Biology And Biotechnology Keywords: callus induction; callus; chlorophyll in vivo fluorescence; coltsfoot; organogenesis; histology; chlorophylls and carotenoids content; callus growth parameters

Online: 24 September 2024 (05:01:42 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202409.1579.v1

Surgical Site Infections: A Study on Application of the Guidelines and Risk Factors

Cristina Genovese, Caterina Elisabetta Rizzo, Elvira Ventura Spagnolo, Giovanni Genovese, Paola Tripodi, Isabella La Spina, Sabrina Sortino, Francesco Loddo, Bruno Romeo, Linda Bartucciotto, Raffaele Squeri

Subject: Public Health And Healthcare, Health Policy And Services Keywords: surgical site infections; healthcare

Online: 20 September 2024 (15:00:21 CEST)

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