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Working Paper ARTICLE

Completeness in Quasi-Pseudometric Spaces

Ştefan Cobzas

Subject: Computer Science And Mathematics, Geometry And Topology Keywords: quasi-pseudometric space; Cauchy sequence; Cauchy net; Cauchy filter; completeness

Online: 15 July 2020 (08:49:38 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202312.1477.v1

The Strong Ekeland Variational Principle in Quasi-Pseudometric Spaces

Stefan Cobzas

Subject: Computer Science And Mathematics, Geometry And Topology Keywords: quasi-metric space; completeness in quasi-metric spaces; variational principles; Ekeland variational principle; strong Ekeland principle

Online: 20 December 2023 (12:18:48 CET)

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Preprint ARTICLE | doi:10.20944/preprints202409.1134.v1

The Mother's Day Solar Storm of 11 May 2024 and Its Effect on Earth's Radiation Belts

Viviane Pierrard, Alexandre Winant, Edith Botek, Maximilien Péters de Bonhome

Subject: Physical Sciences, Space Science Keywords: geomagnetic storm; solar energetic particles; solar event; radiation belts; energetic protons; relativistic electrons

Online: 14 September 2024 (10:38:34 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202403.0069.v1

An Attitude Adaptive Integral Sliding Mode Control Algorithm with Feedforward Compensation Disturbance Observer for Microsatellites to Track High-Speed Moving Targets

Xinyan Yang, Lei Li, Yurong Liao, Zhaoming Li

Subject: Engineering, Aerospace Engineering Keywords: Microsatellite; Attitude Control; Moving Target Tracking; Disturbance Observer; Sliding Mode Control

Online: 1 March 2024 (18:25:20 CET)

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Preprint ARTICLE | doi:10.20944/preprints202406.1287.v1

SE-CBAM-YOLOv7: An Improved Lightweight Attention Mechanism-Based YOLOv7 for Real-Time Detection of Small Aircraft Targets in Microsatellite Remote Sensing Imaging

Zhenping Kang, Yurong Liao, Shuhan Du, Haonan Li, Zhaoming Li

Subject: Engineering, Aerospace Engineering Keywords: aircraft detection; YOLOv7; CBAM; SENet; microsatellite

Online: 18 June 2024 (15:09:54 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202407.0113.v1

Geomagnetic Field Measurements based Adaptive Cubature H-infinity Filter for Microsatellite Autonomous Orbit Estimation

Zhaoming Li, Xinyan Yang, Lei Li, Yurong Liao

Subject: Engineering, Aerospace Engineering Keywords: autonomous orbit estimation; microsatellite; cubature Kalman filter; robust; geomagnetic field

Online: 1 July 2024 (13:54:09 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202405.1876.v1

Assessment of Particulate Organic Carbon in the Mediterranean Sea Based on Dual-Optimization Random Forest

Chao Li, Huisheng Wu, Chaojun Yang, Long Cui, Ziyue Ma, Lejie Wang

Subject: Environmental And Earth Sciences, Remote Sensing Keywords: particle organic carbon; Mediterranean; machine learning; tuneRanger R package; geographic detector

Online: 28 May 2024 (14:28:22 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201905.0371.v1

Thermodynamic, non-extensive, or turbulent quasi equilibrium for space plasma environment

Peter Yoon

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: non-extensive entropic principle; plasma turbulence; quasi equilibrium

Online: 31 May 2019 (06:12:02 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202309.1002.v6

Dark Energy and Dark Matter from Extra Dimensional Symmetry as Different Manifestations of Vacuum Energy

Kabir Umar

Subject: Astronomy And Astrophysics, Physical Sciences Keywords: chirality; dark energy; dark matter; extra dimension; gravity; neutrino; vacuum energy

Online: 23 September 2024 (12:19:15 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201609.0088.v1

Multi-range Conditional Random Field for Classifying Railway Electrification System Objects

Jaewook Jung, Leihan Chen, Gunho Sohn, Chao Luo, Jong-Un Won

Subject: Engineering, Civil Engineering Keywords: classification; railway; power line; mobile laser scanning data; conditional random field; layout compatibility

Online: 26 September 2016 (09:33:05 CEST)

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Railway has been used as one of the most crucial means of transportation in public mobility and economic development. For efficiently operating railways, the electrification system in railway infrastructure, which supplies electric power to trains, is essential facilities for stable train operation. Due to its important role, the electrification system needs to be rigorously and regularly inspected and managed. This paper presents a supervised learning method to classify Mobile Laser Scanning (MLS) data into ten target classes representing overhead wires, movable brackets and poles, which are recognized key objects in the electrification system. In general, the layout of railway electrification system shows a strong regularity of spatial relations among object classes. The proposed classifier is developed based on Conditional Random Field (CRF), which characterizes not only labeling homogeneity at short range, but also the layout compatibility between different object classes at long range in the probabilistic graphical model. This multi-range CRF model consists of a unary term and three pairwise contextual terms. In order to gain computational efficiency, MLS point clouds is converted into a set of line segments where the labeling process is applied. Support Vector Machine (SVM) is used as a local classifier considering only node features for producing the unary potentials of CRF model. As the short-range pairwise contextual term, Potts model is applied to enforce a local smoothness in short-range graph. While, long-range pairwise potentials are designed to enhance spatial regularities of both horizontal and vertical layouts among railway objects. We formulate two long-range pairwise potentials as the log posterior probability obtained by Naïve Bayes classifier. The directional layout compatibilities are characterized in probability look-up tables which represent co-occurrence rate of spatial relations in horizontal and vertical directions. The likelihood function is formulated by multivariate Gaussian distributions. In the proposed multi-range CRF model, the weight parameters to balance four sub-terms are estimated by applying the Stochastic Gradient Descent (SGD). The results show that the proposed multi-range CRF can effectively classify detailed railway elements, representing the average recall of 97.66% and the average precision of 97.07% for all classes.

Preprint ARTICLE | doi:10.20944/preprints202402.0890.v1

Characterization of Industrial High-Strength Aluminum Alloys by Laser-Induced Breakdown Spectroscopy, With Special Emphasis on the Detection of Low Contents of Mg, Mn, Cr, Cu, Zn and Sensing of Molecular Diatomic Emission of AlO During Ablation

Svetlana Rytchkova, Luc Lévesque

Subject: Physical Sciences, Optics And Photonics Keywords: Laser-induced breakdown spectroscopy (LIBS); Aluminum (Al); Magnesium (Mg); Manganese (Mn); Chromium (Cr); Copper (Cu); Zinc (Zn); Aluminum Monoxide (AlO).

Online: 16 February 2024 (07:01:12 CET)

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Preprint ARTICLE | doi:10.20944/preprints202405.2089.v1

The Entropy of the Collapsing Molecular Cloud

Gemechu Muleta Kumssa

Subject: Physical Sciences, Space Science Keywords: Entropy; Gravity; Turbulence; Molecular cloud; Star formation

Online: 31 May 2024 (08:10:11 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202407.1383.v1

A Peak Finding Siamese Convolutional Neural Network (PF-SCNN) for Aero-engine Hot Jet FT-IR Spectrum Classification

Shuhan Du, Wei Han, Zhenping Kang, Fengkun Luo, Yurong Liao, Zhaoming Li

Subject: Engineering, Aerospace Engineering Keywords: infrared spectrum detection; FT-IR; aero-engine hot jet; siamese convolutional neural network networks; peak finding

Online: 17 July 2024 (13:41:29 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202406.1279.v1

CWT-AM-CNN: A Lightweight Feature Extraction Network with Attention Mechanism Based on CWT Peak Seeking Method for Aero-Engine Hot Jet FT-IR Classification

Shuhan Du, Wei Han, Zhenping Kang, Xiangning Lu, Yurong Liao, Zhaoming Li

Subject: Engineering, Aerospace Engineering Keywords: Infrared Spectral detection; FT-IR; Aero-engine hot jet; deep learning; Attention Mechanism

Online: 20 June 2024 (12:51:20 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202406.0062.v1

Development and Testing of a Smart Ice Control System Using Machine Learning Models

Dario Farina, Hatim Machrafi, Patrick Queeckers, Patrice Desire Dongo, Carlo Saverio Iorio

Subject: Computer Science And Mathematics, Artificial Intelligence And Machine Learning Keywords: aerospace icing prevention; risk mitigation in aviation; graphene-based sensors; dynamic ice sensing; de-icing; conductive polymer applications; smart sensors; pedot:pss polymers; 2D materials; micromachines

Online: 3 June 2024 (10:41:17 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202406.0839.v1

Lifetime of Long-Lived Sunspot Groups

Judit Muraközy

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: Solar physics; Sunspots; Sunspot groups; Sunspot cycle; Solar magnetic fields; Solar active region magnetic fields

Online: 12 June 2024 (12:21:17 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202408.2044.v1

Evaluation of Solid Phase Joining Using Friction Stir Welding Technique between Aluminum 6061 and Polymer-Based Composites

NOUMAN ALI, Zain ul Abadeen, Yumna Qureshi

Subject: Chemistry And Materials Science, Other Keywords: FSW (Friction Stir Welding); IMc (Intermetallic Compounds); UTM (Universal Testing Machine); RPM (Revolutions Per Minute); HAZ (Heat Affected Zone); WZ (Weld Zone); BM (Base Metal); CNC (Computer Numeric Control); EDM (Electrical Discharge Machine)

Online: 29 August 2024 (16:58:20 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202409.0030.v1

Surface Ages in the Vicinity of the Chang’e-6 Landing Site

Li Zhang, Jianzhong Liu, Gregory Michael, Ping Ge, Kaichang Di, Congzhe Wu, Kai Zhu, Xiaoxi Kang

Subject: Environmental And Earth Sciences, Geophysics And Geology Keywords: Chang’ e-6; CSFD measurements; absolute model age; Apollo basin

Online: 2 September 2024 (08:54:01 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202407.0928.v1

Transmission Spectroscopy Along the Transit of Venus: A Proxy for Exoplanets Atmospheric Characterization

Alexandre Baptista Branco, Pedro Machado, Olivier Demangeon, Sarah Amelia Jaeggli, Thomas Widemann, Paolo Tanga

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: Venus; Solar Transit; High-resolution transmission spectroscopy; Radiative transfer; Cross-correlation; Carbon dioxide; Carbon monoxide; Ozone; Venus-like exoplanets

Online: 11 July 2024 (08:37:43 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202408.1366.v1

Pore Characteristics of Hydrate-Bearing Sediments from Krishna-Godavari Basin, Offshore India

Wen Guan, Hailin Yang, Xindi Lu, Hailong Lu

Subject: Environmental And Earth Sciences, Oceanography Keywords: hydrate-bearing sediments; microporous structure; Krishna-Godavari Basin; pore characterization

Online: 20 August 2024 (03:39:46 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202405.0039.v1

Water Recuperation from Regolith at Martian, Lunar & Micro-gravity during Parabolic Flight

Dario Farina, Hatim Machrafi, Patrick Queeckers, Christophe Minetti, Carlo Saverio Iorio

Subject: Engineering, Aerospace Engineering Keywords: regolith hydration; water extraction technologies; parabolic flight simulation; ice-regolith interaction; substrate condensation efficiency; in-situ resource utilization (ISRU); thermal condensation processes; micro-gravity experiments; surface properties and water recovery; space resources; space mining

Online: 1 May 2024 (09:56:06 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202405.1133.v1

Modular Quasi-pseudo Metrics and the Aggregation Problem

Maria del Mar Bibiloni-Femenias, Oscar Valero

Subject: Computer Science And Mathematics, Geometry And Topology Keywords: modular quasi-pseudo metric; quasi-pseudo metric; aggregation; monotony; subadditivity; triangle triplet

Online: 17 May 2024 (17:22:10 CEST)

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Preprint SHORT NOTE | doi:10.20944/preprints202307.1079.v1

Reconsideration and Proposal of Development Models in Projects- “Quasi” Development Models: Quasi-Waterfall and Quasi-Agile

Takaaki Fujita

Subject: Computer Science And Mathematics, Other Keywords: waterfall development; agile development; hybrid development; development models

Online: 17 July 2023 (08:38:44 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202405.1792.v1

Unsupervised Characterization of Water Composition with UAV-based Hyperspectral Imaging and Generative Topographic Mapping

John Waczak, Adam Aker, Lakitha O. H. Wijeratne, Shawhin Talebi, Ashen Fernando, Prabuddha M. H. Dewage, Mazhar Iqbal, Matthew Lary, David Schaefer, Gokul Balagopal, And David J. Lary

Subject: Environmental And Earth Sciences, Environmental Science Keywords: Hyperspectral Imaging; Remote Sensing; Unsupervised Classification; Endmember Extraction; Generative Topographic Mapping

Online: 3 June 2024 (17:09:23 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202403.1444.v1

Environmental Chamber Characterization of an Ice Detection Sensor for Aviation Using Graphene and PEDOT:PSS

Dario Farina, Marco Mazio, Hatim Machrafi, Patrick Queeckers, Carlo Saverio Iorio

Subject: Engineering, Aerospace Engineering Keywords: Ice Formation; Aircraft Ice Detection; Hazard Management; Graphene Sensors; In-Flight Safety Technology; Real-time Ice Monitoring; Resistance Signal Analysis; Pedot:PSS; Climatic chamber

Online: 25 March 2024 (08:47:38 CET)

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Preprint ARTICLE | doi:10.20944/preprints202404.1704.v1

Vision System for the Mars Sample Return Capture, Containment and Return System (CCRS)

Brent Jon Bos, David Donovan, John Capone, Chen Wang, Terra Hardwick, Dylan Bell, Yuqing Zhu, Robert Podgurski, Bashar Rizk, Ireneusz Orlowski, Rachel Edison, David Harvey, Brianna Dizzon, Lindsay Haseltine, Kristoffer Olsen, Chad Sheng, Robert Bousquet, Luan Vo, Georgi Georgiev, Kristen Washington, Michael Singer, Stefan Ioana, Anloc Le, Elena Georgieva, Michael Hackett, Michael Ravine, Michael Caplinger, Phillip Coulter, Erin Percy, Charles Torisky, Jean Lauenstein, Kaitlyn Ryder, Michael Campola, Dillon Johnstone, William J. Thomes, Richard G. Schnurr, John McCloskey, Eugenia DeMarco, Ellen Lee, Calinda Yew, Bo Yang, Mingyu Han, Bartosz Blonski

Subject: Engineering, Aerospace Engineering Keywords: Mars; cameras; sample return; space optics

Online: 26 April 2024 (09:33:12 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202408.2092.v1

Design and On-Orbit Performance of Ku-Band Phase-Array SAR Payload System

Wei Yan, Xiaomin Tan, Jiang Wu, Mingze Yuan, Hongxing Dang, Wujun Chang

Subject: Engineering, Aerospace Engineering Keywords: Ku band; SAR system; payload; Taijing-4(03); on-orbit; application; micro-nano; satellite

Online: 29 August 2024 (07:14:22 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202404.1284.v1

Robust Wideband Interference Suppression Method for GNSS Array Antenna Receiver via Hybrid Beamforming Technique

Zhenxing Xu, Qijia Dong, Shenyang Li, Fuzhan Yue, Meng Wang, Zhenghuan Xia, Xiao Chen, Shuangna Zhang, Guoji Zou, Huizheng Wang

Subject: Engineering, Aerospace Engineering Keywords: wideband interference; anti-jamming; hybrid beamforming; hybrid array; digital array

Online: 18 April 2024 (15:42:11 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202405.2062.v1

IFU Spectroscopic Study of the Planetary Nebula Abell 30: Mapping the Ionization and Kinematic Structure of the Inner Complex

Kam Ling Chan, Quentin Andrew Parker, Andreas Ritter

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: Planetary nebulae; Abell 30; Integral spectroscopy; Kinematics; velocity maps; Binary system; born-again scenario; wolf rayet central star; hydrogen deficient CSPN

Online: 30 May 2024 (13:43:19 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202406.1264.v1

Microwave Corona Breakdown Suppression of Microstrip Coupled-Line Filter Using Lacquer Coating

Ming Ye, Shaoguang Hu, Rui Wang, Yong Zhang, Yongning He

Subject: Engineering, Electrical And Electronic Engineering Keywords: coupled-line filter; dielectric coating; microstrip circuits; microwave corona breakdown suppression ;

Online: 18 June 2024 (13:36:03 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202402.0801.v1

Chiral Jahn-Teller Distortion in Quasi-Planar Boron Clusters

Dongbo Zhao, Xin He, Yilin Zhao, Tianlv Xu, Shankai Hu, Paul W. Ayers, Shubin Liu

Subject: Chemistry And Materials Science, Physical Chemistry Keywords: Jahn-Teller effect; Helical spin density; Helical molecular orbital; Boron clusters

Online: 14 February 2024 (11:26:08 CET)

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Preprint ARTICLE | doi:10.20944/preprints202405.1729.v1

A Quasi-Chronological Investigation of Inclusivity as a Key Constituent of Social Sustainability

Preeti Pansare, Ashraf M. Salama, Lesley McIntyre

Subject: Social Sciences, Urban Studies And Planning Keywords: Public Spaces; Inclusivity; Social Cohesion; Social Accessibility; Social Networks

Online: 27 May 2024 (11:00:50 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202402.0545.v1

Global Generalized Mersenne Numbers: Definition, Decomposition, and Generalized Theorems

Vladimir Pletser

Subject: Computer Science And Mathematics, Algebra And Number Theory Keywords: Mersenne numbers; Generalized Mersenne numbers; divisibility and congruence properties

Online: 9 February 2024 (10:50:56 CET)

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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/preprints201701.0060.v1

Quasi-Interpolation Operators for Bivariate Quintic Spline Spaces and Their Applications

Rengui Yu, Chungang Zhu, Xianmin Hou, Li Yin

Subject: Computer Science And Mathematics, Mathematics Keywords: bivariate spline space; quasi-interpolation operator; type-2 triangulation 3; burgers’ equations; image reconstruction

Online: 12 January 2017 (10:04:06 CET)

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Preprint ARTICLE | doi:10.20944/preprints202406.1725.v1

Ionosonde Measurements Comparison during an ICME- and a SIR/CIR-Driven Geomagnetic Storm over Europe

Kitti Alexandra Berényi, Loredana Perrone, Dario Sabbagh, Alessandro Ippolito, Carlo Scotto, Árpád Kis, Veronika Barta

Subject: Environmental And Earth Sciences, Space And Planetary Science Keywords: space weather; geomagnetic storms; ionosphere; ionospheric storm; ICME; SIR/CIR; ionosonde; Digisonde; rTEC; TIMED/GUVI

Online: 25 June 2024 (07:15:52 CEST)

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Preprint ESSAY | doi:10.20944/preprints201801.0060.v1

Some Potentially Strategic Considerations for the Sex-Bot Industry

Glenn W. Smith

Subject: Social Sciences, Gender And Sexuality Studies Keywords: sexually-enable robot; sex-bot

Online: 8 January 2018 (09:56:06 CET)

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Preprint ARTICLE | doi:10.20944/preprints202408.2013.v1

On the Ionisation Tolerance of C₂₀ Fullerene in Ground and Excited Electronic States in Planetary Nebulae

SeyedAbdolreza Sadjadi, Quentin Andrew Parker

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: astrochemistry; C₂₀ fullerene; Ionisation; excited state; DFT; planetary nebulae

Online: 28 August 2024 (05:16:53 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202405.0433.v1

A Novel Algorithm for Classifying Vegetation and Non-Vegetation Using Red Edge Slope Coefficient with Hyperspectral LCTF Imaging

Bayarsaikhan Uudus, Bayartsetseg Oyungerel, Yukihiro Takahashi, Erdenebaatar Dashdondog, Turtogtokh Tumenjargal, Narangarvuu Dashdondog, Qinxue Wang, Hasi Bagan, Begzsuren Tumendemberel

Subject: Environmental And Earth Sciences, Ecology Keywords: Hyperspectral Imaging; Liquid Crystal Tunable Filter; Red Edge Slope Coefficient; Spectral Reflectance; Vegetation Classification; Remote Sensing Algorithms

Online: 8 May 2024 (15:28:55 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201608.0178.v1

Bias Correction of Chinese Fengyun-3C Microwave Humidity and Temperature Sounder Measurements in Retrieval of Atmospheric Parameters

Qiurui He, Zhenzhan Wang, Jieying He

Subject: Environmental And Earth Sciences, Atmospheric Science And Meteorology Keywords: FY-3C/MWHTS; linear regression correction; neural networks correction; one-dimensional variational algorithm; atmospheric temperature and humidity profiles

Online: 19 August 2016 (09:22:31 CEST)

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The Microwave Humidity and Temperature sounder (MWHTS) on board the Fengyun (FY)-3C satellite measure the outgoing radiance form the Earth surface and atmospheric constituents. MWHTS makes measurements in the isolated oxygen absorption line near 118 GHz and the vicinity of strong water vapor line around 183 GHz, can provide fine vertical distribution structure of both atmospheric humidity and temperature. However, in order to obtain the accurate soundings of humidity and temperature by the physical retrieval method, bias between the observed radiance and those simulated by radiative transfer model from the background or first guess profiles must be correct. In this study, two bias correction methods are developed through the correlation analysis between MWHTS measurements and air mass identified by the first guess profiles of the physical inversion, one is the linear regression correction (LRC) and the other is neural networks correction (NNC), representing the linear and nonlinear nature between MWHTS measurements and air mass, respectively. Both correction methods have been applied to MWHTS observed brightness temperatures over the geographic area (180° W-180° E, 60° S-60° N). The corrected results are evaluated by the probability density function of the difference between corrected observations and simulated values and the root mean square error (RMSE) with respect to simulated observations. The numerical results show that the NNC method perform better, especially in MWHTS channels 1 and 7-9 whose peak weight function heights are close to the surface. In order to assess the effects of bias correction methods proposed in this study on the retrieval accuracy, a one-dimensional variational system was built and applied to the MWHTS uncorrected and corrected brightness temperatures to estimated atmospheric temperature and humidity profiles, The retrieval results show that the NNC has better performance which is to be expected. An indication of the stability and robustness of NNC method is given which suggests that the NNC method has promising application perspectives in the physical retrieval.

Preprint ARTICLE | doi:10.20944/preprints201910.0213.v1

Quasi Cubic Trigonometric Curve and Surface

Guicang Zhang, Kai Wang

Subject: Computer Science And Mathematics, Computational Mathematics Keywords: Quasi Extended Chebyshev space; optimal normalized totally positive basis; high-order continuity; shape preserving; shape features

Online: 18 October 2019 (11:33:13 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202404.0808.v1

Quasi-solid Composite Electrolytes of Poly-(Dioxolane) & Garnet LLZO Nanofibers Enable High Energy Efficiency Lithium-Metal Batteries

Zhengqiang Li, David R. Salem

Subject: Chemistry And Materials Science, Electrochemistry Keywords: Gel-electrolytes, Lithium-metal battery, Lithium dendrites, c-LLZO nanofiber

Online: 11 April 2024 (11:48:04 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202408.0961.v1

Research on Short‐Term Forecasting Model of Global Atmospheric Temperature and Wind in the Near Space Based on Deep Learning

Xingxin Sun, Ting Lan, Yi Liu, Chen Zhou, Jian Feng, Huiyun Yang, Yuqiang Zhang, Zhou Chen, Tong Xu, Zhong-Xin Deng, Zhengyu Zhao

Subject: Environmental And Earth Sciences, Atmospheric Science And Meteorology Keywords: Global atmospheric temperature and wind in the near space; ConvGRU; ConvLSTM; MERRA‐2 reanalysis dataset

Online: 13 August 2024 (14:41:57 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202402.0543.v1

Random Forest Classifier for Cloud Clearing of the Operational TROPOMI XCH4 Product

Tobias Borsdorff, Mari Carmen Martinez-Velarte, Maarten Sneep, Mark ter Linden, Jochen Landgraf

Subject: Environmental And Earth Sciences, Remote Sensing Keywords: TROPOMI; CH4; SUOMI NPP; VIIRS; CLOUDS; Machine Learning; Random Forest Classifier

Online: 9 February 2024 (10:52:15 CET)

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Preprint ARTICLE | doi:10.20944/preprints202407.2539.v1

Corrections of the Distribution of Nuclei Due to Neutron Degeneracy and Their Effects in the R-Process in Neutron Stars - Black Hole Mergers

Rita K. Y. Lau

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: nuclear astrophysics; nuclear reactions; neutron stars; black holes

Online: 31 July 2024 (14:04:38 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202406.0461.v1

Variations of VEGFR2 Chemical Space: Stimulator and Inhibitory Peptides

Claudiu N. Lungu, Ionel Mangalagiu, Gabriela Gurau, Mihaela Cezarina Hîncu

Subject: Medicine And Pharmacology, Cardiac And Cardiovascular Systems Keywords: peripheral artery disease; molecular modeling; docking; angiogenesis; vascular morphogenesis; chimeric protein

Online: 7 June 2024 (07:32:42 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202402.0683.v1

The Post–Quasi–Static Approximation: An Analytical Approach to Gravitational Collapse

Luis Herrera, Alicia Di Prisco, Justo Ospino

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: Relativistic fluid; gravitational collapse; dissipative systems

Online: 12 February 2024 (13:26:34 CET)

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Preprint ARTICLE | doi:10.20944/preprints201610.0078.v1

Copernicus Sentinel-2 Calibration and Products Validation Status

Ferran Gascon, Olivier Thépaut, Mathieu Jung, Benjamin Francesconi, Jérôme Louis, Vincent Lonjou, Bruno Lafrance, Stéphane Massera, Angélique Gaudel-Vacaresse, Florie Languille, Bahjat Alhammoud, Françoise Viallefont, Jakub Bieniarz, Bringfried Pflug, Sébastien Clerc, Laëtitia Pessiot, Thierry Trémas, Enrico Cadau, Roberto De Bonis, Claudia Isola, Philippe Martimort, Valérie Fernandez

Subject: Environmental And Earth Sciences, Environmental Science Keywords: calibration; validation; optical; instrument; processing; imagery; spatial; operational

Online: 19 October 2016 (10:59:29 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202404.1215.v1

Evaluating the VIIRS Imagery for Developing Near Real-Time Nationwide Vegetation Cover Monitoring in Indonesia

Yudi Setiawan, Kustiyo Kustiyo, Sahid Agustian Hudjimartsu, Judin Purwanto, Riva Rovani, Anna Tosiani, Basyiruddin Usman, Tatik Kartika, Novie Indriasari, Lilik Budi Prasetyo, Belinda Arunarwati Margono

Subject: Environmental And Earth Sciences, Remote Sensing Keywords: change detection; temporal vegetation dynamics; open area index; multi temporal VIIRS

Online: 18 April 2024 (10:57:27 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202101.0219.v1

Analysis of Mechanical Behaviors of Waterbomb Thin-Shell Structures Under Quasi-Static Load

Lijuan Zhao, Zuen Shang, Tianyi Zhang, Zhan Liu, Liguo Han, and Chongwang Wang

Subject: Engineering, Automotive Engineering Keywords: Waterbomb structure; Origami pattern; Quasi-static load; Critical axial buckling load-to-weight ratio; Radial stiffness-to-weight ratio

Online: 12 January 2021 (12:20:55 CET)

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Preprint ARTICLE | doi:10.20944/preprints202408.1914.v1

Estimates for Certain Rough Multiple Singular Integrals on Triebel-Lizorkin Space

Hussain Al-Qassem, Mohammed Ali

Subject: Computer Science And Mathematics, Analysis Keywords: Triebel-Lizorkin space; singular integrals; Rough kernels; product spaces

Online: 27 August 2024 (17:06:35 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202407.1015.v1

Periodic and Quasi periodic Orbits in the Collinear Four-Body Problem: A Variational Analysis

Abdalla Mansur, Muhammad Shoaib, Iharka Szücs-Csillik, Daniel Offin, Jack Brimberg, Hedia Fgaier

Subject: Computer Science And Mathematics, Mathematics Keywords: four-body problem; action minimizing orbits; celestial mechanics

Online: 12 July 2024 (10:12:45 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202404.0122.v1

Landau Tidal Damping and Major-Body Clustering in Solar and Extrasolar Subsystems

Dimitris M. Christodoulou, Demosthenes Kazanas

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: Dynamical evolution of planets and satellites; Extrasolar planets; Gravitation; Landau damping; Mean tidal field

Online: 2 April 2024 (09:18:05 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202308.1043.v1

Quasi–Hyperbolically Symmetric γ-Metric

Luis Herrera, Alicia Di Prisco, Justo Ospino, Jaume Carot

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: Black holes; exact solutions; general relativity

Online: 15 August 2023 (03:35:38 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202202.0100.v1

Quasi-Degree in Neutrosophic Graphs

Henry Garrett

Subject: Computer Science And Mathematics, Applied Mathematics Keywords: Quasi-Co-Degree; Quasi-Degree; Vertex

Online: 7 February 2022 (16:23:20 CET)

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New setting is introduced to study quasi-degree and quasi-co-degree arising from co-neighborhood. quasi-degree and quasi-co-degree is about a vertex which are applied into the setting of neutrosophic graphs. . The structure of set is studied and general results are obtained. Also, some classes of neutrosophic graphs namely path-neutrosophic graphs, cycle-neutrosophic graphs, complete-neutrosophic graphs and star-neutrosophic graphs, complete-bipartite-neutrosophic graphs and complete-multipartite-neutrosophic graphs are investigated in the terms of a vertex which is called either quasi-degree or quasi-co-degree. Neutrosophic number is reused in this way. It’s applied to use the type of neutrosophic number in the way that, three values of a vertex are used and they’ve same share to construct this number to compare with other vertices. Summation of three values of vertex makes one number and applying it to a comparison. This approach facilitates identifying vertices which form quasi-degree and quasi-co-degree. Quasi-degree is a value of a vertex which is maximum amid all values of vertices which are neighbors to a fixed vertex. Quasi-co-degree is a value of an edge which is maximum amid all values of edges which are neighbors to a fixed vertex but corresponded vertex is representative for this notion. Using different values which are related to a vertex inspire us to focus on edge and vertices which are corresponded to a fixed vertex. The notion of neighborhood is used to collect either vertices are titled neighbors or edges are incident to fixed vertex. In both settings, some classes of well-known neutrosophic graphs are studied. Some clarifications for each result and each definitions are provided. Using fixed vertex has key role to have these notions in the form of vertex or edge. The value of an edge has eligibility to call quasi-co-degree but the value of a vertex has eligibility to call quasi-degree. Some results get more frameworks and perspective about these definitions. The way in that, two vertices have connection together, open the way to define neighborhood and co-neighborhood. The maximum values in neighborhood and co-neighborhood introduces quasi-degree and quasi-co-degree, respectively. New name is chosen from degree. Since amid all vertices with different degrees, one vertex is chosen. In other words, one vertex is fixed and its degree turns out quasi-degree where two degrees could be assigned to a vertex. Degree of edges and degree of vertices. The number of edges which are incident to the vertex and the number of vertices which are neighbors to the vertex. Degree and co-degree are the notions which are transformed to use in quasi-style. Two neutrosophic values introduce two neutrosophic vertices separately in each settings. These notions are applied into neutrosophic graphs as individuals but not family of them as drawbacks for these notions. Finding special neutrosophic graphs which are well-known, is an open way to purse this study. Some problems are proposed to pursue this study. Basic familiarities with graph theory and neutrosophic graph theory are proposed for this article.

Preprint ARTICLE | doi:10.20944/preprints202406.1593.v1

Evolution of Dew and Rain Water Resources in Gujarat (India) between 2005 and 2021

Rupal Budhbhatti, Anil Roy, Marc Muselli, Daniel Beysens

Subject: Environmental And Earth Sciences, Atmospheric Science And Meteorology Keywords: Water resources; dew and rain increase; dew/rain ratio; dew/rain correlation; dew/rain mapping; Gujarat (India); climate change.

Online: 24 June 2024 (11:36:33 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202402.1670.v1

Understanding Microplastics Retention Efficiency and Sorption Dynamics in Porous Media

Hande Okutan, Çağdaş Sağır, Bedri Kurtuluş, Hasan Burak Özmen, Emrah Pekkan, Moumtaz Razack, Philippe Le Coustumer

Subject: Environmental And Earth Sciences, Environmental Science Keywords: microplastics; porous media; retention; transport; polyethylene; retention efficiency; numerical model; MT3DMS; MODFLOW

Online: 29 February 2024 (11:41:01 CET)

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Preprint ARTICLE | doi:10.20944/preprints201608.0002.v1

Results of Long-Duration Simulation of Distant Retrograde Orbits

Gary Turner

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: Distant Retrograde Orbit; DRO; orbits–stability; radiation pressure; orbits–resonance; dynamics

Online: 1 August 2016 (09:00:06 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201708.0059.v1

Quasi-Static and Tensile Behaviors of the Bamboos

Baoming Gong, Shaohua Cui, Ziye Fan, Fuguang Ren, Qian Ding, Yongtao Sun, Bin Wang

Subject: Chemistry And Materials Science, Biomaterials Keywords: moso bamboo; quasi-static behavior; tensile behavior; size effect on energy absorption; damage pattern of the multiple bamboo columns; macroscopic tensile fracture mode

Online: 17 August 2017 (07:53:23 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202402.0697.v1

Quantifying Inhaled Concentrations of Particulate Matter, Carbon Dioxide, Nitrogen Dioxide, and Nitric Oxide Using Observed Biometric Responses with Machine Learning

Shisir Ruwali, Shawhin Talebi, Bharana Fernando, Lakitha O. H. Wijeratne, John Waczak, Prabuddha Madusanka Hathurusinghe Dewage, David J. Lary, John Sadler, Tatiana Lary, Matthew Lary, Adam Aker

Subject: Public Health And Healthcare, Public, Environmental And Occupational Health Keywords: Autonomic Response; Exposome; Micoenvironment; Air Quality; Biometric Observations; Machine Learning; Particulate Matter; CO2; NO2; NO

Online: 14 February 2024 (03:38:19 CET)

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Preprint REVIEW | doi:10.20944/preprints202208.0347.v1

The Uncertainty Principle and the Minimal Space-Time Length Element

David Escors, And Grazyna Kochan

Subject: Physical Sciences, Quantum Science And Technology Keywords: General relativity; uncertainty principle; geodesics; black hole singularity; quantum gravity; Planck star; Lorentz invariance violations.

Online: 18 August 2022 (11:06:06 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202306.1583.v1

A Remark on Quasi-automorphisms and Deformable Structures in Quasi-set Theory and Its Account to the Logical Foundations of Quantum Theory

Décio Krause

Subject: Arts And Humanities, Philosophy Keywords: logical foundations of quantum theory; indistinguishability; indiscernibility; quantum objects; deformable structures; quasi automorphisms

Online: 21 June 2023 (16:52:36 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/preprints202406.0082.v2

A Field-Theory Approach for Modeling Dissipative Relativistic Fluids

Nils Andersson, Thomas Celora, Gregory Comer, Ian Hawke

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: relativistic fluids; dissipation; field theory

Online: 16 July 2024 (05:26:47 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202405.0755.v1

Combined Response of Ocular Cyclotorsion and Head Tilt during Body Tilt

Se Joon Woo, Sang-Ho Hwang, Ki Young Chung, Hee Kyung Yang, Sang Beom Han, Jeong-Min Hwang

Subject: Biology And Life Sciences, Life Sciences Keywords: cyclotorsion; tilt; vestibulo-ocular reflex; cervico-ocular reflex; optokinetic reflex

Online: 13 May 2024 (12:15:38 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202407.1751.v1

CP Violation: Differing Binding Energy Levels of Quarks and Antiquarks, and their Transitions in Λ-baryons and B-mesons

Dimitris M Christodoulou, Demosthenes Kazanas

Subject: Physical Sciences, Particle And Field Physics Keywords: CP Violation; Flavor Symmetries; Properties of Hadrons; Quark Masses; Quark-Gluon Plasma

Online: 22 July 2024 (14:44:53 CEST)

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Preprint HYPOTHESIS | doi:10.20944/preprints202402.1074.v1

A New Theory of Tree Sap Flow

András Török, Domokos Máthé, Imre Hegedus

Subject: Biology And Life Sciences, Forestry Keywords: plant water transport, suction-pressure pipe, pulsating system, different time-phase cycle, aquaporin

Online: 19 February 2024 (16:46:00 CET)

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Preprint ARTICLE | doi:10.20944/preprints202404.1554.v1

Exogenous Cytokinin 4-PU-30 Modulates the Response of Wheat and Einkorn Seedlings to UV-B Radiation

Elisaveta Kirova, Irina Moskova, Vasilissa Manova, Yana Koycheva, Zoia Tsekova, Denitsa Borisova, Hristo Nikolov, Ventzeslav Dimitrov, Iskren Sergiev, Konstantina Kocheva

Subject: Biology And Life Sciences, Plant Sciences Keywords: antioxidant gene expression; flavonoids; oxidative stress; phenolic compounds; phenylurea-cytokinin; proline; remote sensing; ROS; spectral reflectance

Online: 24 April 2024 (08:58:18 CEST)

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Preprint REVIEW | doi:10.20944/preprints202406.1787.v1

Virtual Reality Usefulness on Symptom Management during Chemotherapy in Lung Cancer Patients: A Quasi-experimental Study

Lucia Mitello, Flavio Marti, Lucia Mauro, Ludovica Siano, Antonello Pucci, Concetta Tarantino, Gennaro Rocco, Alessandro Stievano, Laura Iacorossi, Giuliano Anastasi, Rosaria Ferrara, Anna Rita Marucci, Giustino Varrassi, Diana Giannarelli, Roberto Latina

Subject: Medicine And Pharmacology, Oncology And Oncogenics Keywords: virtual reality; lung cancer; pain perception; chemotherapy; well-being; nursing

Online: 25 June 2024 (14:14:06 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202407.0077.v1

Enhancing Regional Quasi-Geoid Refinement Precision: An Analytical Approach Employing ADS80 Tri-linear Array Stereoscopic Imagery for Aerial Triangulation Densification and GNSS Gravity-Potential Leveling

Wei Xu, Gang Chen, Defang Yang, Kaihua Ding, Rendong Dong, Xuyan Ma, Sipeng Han, Shengpeng Zhang, Yongyin Zhang

Subject: Environmental And Earth Sciences, Remote Sensing Keywords: ADS80; InSAR; Aerial triangulation; GNSS gravity-potential Leveling; Quasi-geoid surface

Online: 1 July 2024 (13:07:50 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202409.1350.v1

Comparation of CALPUFF and CFD Modeling of Toxic Gas Dispersion in Mountainous Environments

Mei Li, ChoHo Lo, Dongou Yang, Yuanchen Li, Zhe Li

Subject: Environmental And Earth Sciences, Atmospheric Science And Meteorology Keywords: Mountainous Environment; High Sulphur Gas; CALPUFF; CFD; Atmospheric Dispersion Model

Online: 18 September 2024 (12:11:14 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202307.1629.v1

Scaled-Invariant Extended Quasi-Lindley Model: Properties, Estimation and Application

Mohamed Kayid, Abdulrahman Abouammoh, Ghadah Alomani

Subject: Computer Science And Mathematics, Probability And Statistics Keywords: Quasi Lindley model; maximum likelihood estimator; expectation maximization algorithm

Online: 25 July 2023 (03:08:48 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202407.0159.v1

Multilevel Quasi-Interpolation on Chebyshev Sparse Grids

Faisal Alsharif

Subject: Computer Science And Mathematics, Computational Mathematics Keywords: Multilevel; Quasi-Interpolation; Sparse; Chebyshev; Gaussian Kernel; Meshless Grid}

Online: 2 July 2024 (09:39:04 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202111.0473.v1

A Thermally Stable Quasi-CMOS Bipolar Logic

Wieslaw Kuzmicz

Subject: Engineering, Electrical And Electronic Engineering Keywords: bipolar logic; bipolar transistor; thermal stability; bipolar inverter; PD-SOI, FD-SOI

Online: 25 November 2021 (12:46:24 CET)

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Preprint CASE REPORT | doi:10.20944/preprints202403.1325.v2

Deep Learning-based Approach for Optimizing Urban Commercial Space Expansion Using Artificial Neural Networks

Dawei Yang, Jiahui Zhao, Ping Xu

Subject: Business, Economics And Management, Economics Keywords: Commercial space; Points of interest; Deep learning; BP Neural Network

Online: 7 April 2024 (13:58:27 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201712.0090.v1

Analyze PFG Anomalous Diffusion via Real Space and Phase Space Approaches

Guoxing Lin

Subject: Computer Science And Mathematics, Probability And Statistics Keywords: PFG anomalous diffusion; fractional derivative; NMR; MRI

Online: 14 December 2017 (11:27:15 CET)

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Preprint ARTICLE | doi:10.20944/preprints202407.1155.v1

Belgrade’s Sustainable Transition: Reflections by Urban Planners on Change in Planning Urban Green Space

Sladana Milovanovic, Ivan Cvitković, Katarina Stojanović, Ante Klečina

Subject: Engineering, Architecture, Building And Construction Keywords: urban green space; urban planner; urban governance; sustainable transition; Belgrade

Online: 15 July 2024 (12:09:04 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202404.1766.v1

Quasi-Interpolation on Chebyshev Grids with Boundary Corrections

Faisal Alsharif

Subject: Computer Science And Mathematics, Computational Mathematics Keywords: Quasi-Interpolation; Radial basis functions; Boundary corrections; Chebyshev Points; Univariate Interpolation

Online: 26 April 2024 (11:52:07 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201609.0055.v1

Cultural Heritage Sites in Danger—Towards Automatic Damage Detection from Space

Daniele Cerra, Simon Plank, Vasiliki Lysandrou, Jiaojiao Tian

Subject: Arts And Humanities, Archaeology Keywords: change detection; Cultural Heritage; texture analysis

Online: 18 September 2016 (08:38:10 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202405.0956.v1

3D – 2D Crossover and Phase Shift of Beats of Quantum Oscillations of Interlayer Magnetoresistance in Quasi-2D Metals

Taras Igorevich Mogilyuk, Pavel Dmitrievich Grigoriev, Vladislav Dmitrievich Kochev, Ivan Sergeevich Volokhov, Ilya Yakovlevich Polishchuk

Subject: Physical Sciences, Condensed Matter Physics Keywords: conductivity; magnetization; phase; magnetic quantum oscillations; layered materials.

Online: 14 May 2024 (11:08:22 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202403.0117.v2

Emergence of Time from Primordial Space and Expansion of Space with Time

Eckhard Rebhan

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: space-time; generic space expansion; emergence of time; dark energy; quantum grav-ity; Wheeler-de Witt-equation; volume quantisation; friction by information transfer; information quantum

Online: 28 May 2024 (14:26:25 CEST)

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A model of space-time is presented, whose origin is set before the appearance of any universe. It uses concepts of previous work, a central one being that the information about the laws of nature is stored locally everywhere in space such that all physical processes obey them. Since information storage is bound to matter or energy, space is assumed to consist of dark energy (DE), which thus assumes an importance far beyond its function as a stopgap for an energy deficit in our universe ( U ). The primordial state (PS) is a timeless and relatively large space of 3 dimensions described by a Wheeler DeWitt (WDW) equation, whose solution is interpreted as an arrangement of very many space quanta and possesses properties that remind of the time-honored concept of the unmoved mover. The comparison of WDW solutions belonging to different mass densities of the DE favors one in which the space quanta are mini black holes. This allows the space quanta to be imagined as mass points which are kept at a distance compatible with the quantum volume by the Pauli principle or something equivalent. Triggered by a dramatic increase in probability, the PS is followed by a time-controlled sequence of quantized expansion states (ES i ). The concomitant emergence of time occurs in a lightning huge crash, consuming almost all DE of the PS. The subsequent quantized ES i emerge from a WDW equation, novelly derived from a solution of the modified cosmic momentum equation, which classically describes an exponential space expansion (CS). The huge volme of the ES i is also used as size of the PS. Information is assumed to be geometrically stored in arrangements of space quanta similar to how genetic information is stored in DNA molecules. During the CS information must be transferred from already existing "information quanta" to new ones. This requires time, slows down the expansion and is taken into account by a friction term in the cosmological momentum equation thus modified. Since the Friedmann-Lemaître (FL) equation remains fully valid, the model is widely based on recognized equations, so that some results may be understood as interpretations.

Preprint ARTICLE | doi:10.20944/preprints202404.1919.v1

Outlier Detection by Energy Minimization in Quantized Residual Preference Space for Geometric Model Fitting

Zhang Yun, Yang Bin, Zhao Xi, Shiqian Wu, Luo Bin, Liangpei Zhang

Subject: Computer Science And Mathematics, Computer Vision And Graphics Keywords: geometric model fitting; outlier detection; quantized residual; energy minimization

Online: 30 April 2024 (03:47:50 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202404.0057.v1

Numerical Analysis of the Influence of Typical Perturbation Forces on LEO Satellites Orbit Prediction at Different Altitudes

Yang Zhang, Shengmao He, Chao Peng, Yuchang Xu, Deyong Xian, Ran Li, Guang Yang, Hong Yuan

Subject: Engineering, Aerospace Engineering Keywords: LEO constellations; Perturbation force; Gravitational field order; orbit prediction; Atmospheric density model

Online: 1 April 2024 (13:30:31 CEST)

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Preprint REVIEW | doi:10.20944/preprints202403.0363.v1

Fluorescent Nanodiamonds for Nanoscale Thermometry in Biology

Anna Ermakova

Subject: Physical Sciences, Applied Physics Keywords: fluorescent nanodiamonds; color center; nanoscale thermometry; temperature mapping; biological applications; living cells.

Online: 6 March 2024 (12:23:47 CET)

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Preprint ARTICLE | doi:10.20944/preprints201706.0019.v2

Quantum Space and the Evolution of the Dark Universe

Carlos A. Melendres

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: quantum space; expansion of the universe; dark energy; thermodynamics; dark matter; plasma; recombination; vacuum energy; Cosmological Constant; Quintessence; spaceons

Online: 18 August 2017 (04:51:40 CEST)

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We present a model of space that considers it to be a quantized dynamical entity which is a component of the universe along with matter and radiation. The theory is used together with thermodynamic data to provide a new view of cosmic evolution and an insight into the nature of dark energy and dark matter. Space is made up of energy quanta. The universe started from an atomic size volume at very high temperature and pressure near the Planck epoch. Upon expansion and cooling, phase transitions occurred resulting in the formation of radiation, fundamental particles, and matter. These nucleate and grow into stars, galaxies, and clusters. From a phase diagram of cosmic composition, we obtained a correlation between dark energy and the energy of space. Using the Friedmann equations, data from WMAP studies of the composition of the universe at 3.0 x 10⁵ (a=5.25 x 10^-2) years and at present (a=1), are well fitted by our model with an equation of state parameter, w= -0.7. The accelerated expansion of the universe, starting at about 7 billion years, determined by BOSS measurements, also correlates well with the dominance of dark energy at 7.25 x 10⁹ years ( a= 0.65). The expansion can be attributed to Quintessence with a space force arising from a quantum space field. From our phase diagram, we also find a correlation suggesting that dark matter is a plasma form of matter similar to that which existed during the photon epoch immediately prior to recombination. Our Quantum Space Model leads to a universe which is homogeneous and isotropic without the need for inflation. The thermodynamics of expansion is consistent with BOSS data that show the process to be adiabatic and the rate of expansion decelerating during the first 6 billion years after the Big Bang. However, it became non-adiabatic and accelerating thereafter. This implies an influx of energy from a source outside the universe; it warrants consideration as a possible factor in the accelerated expansion of the universe.

Preprint ARTICLE | doi:10.20944/preprints202306.0498.v1

Survivals of Bacteriophage T4 in Quasi-Pure Ionic Solutions

Seiko Hara, Isao Koike

Subject: Biology And Life Sciences, Immunology And Microbiology Keywords: infectivity; neutral solution; acidic solution; alkaline solution; deprotonation

Online: 7 June 2023 (07:05:54 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202407.2097.v1

Optimal Synthesis of a Satellite Attitude Control System under Constraints on Control Torques and Speeds of Reaction Wheels

Meirbek Moldabekov, Alisher Aden, Yerkin Orazaly, Nuriya Zhumabekova

Subject: Engineering, Control And Systems Engineering Keywords: satellite; attitude control system; dynamics; linear model; parameter synthesis

Online: 26 July 2024 (13:17:21 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202105.0197.v9

Space Theory

S. Chen

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: space; gravitation

Online: 26 March 2024 (14:12:05 CET)

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Preprint ARTICLE | doi:10.20944/preprints202404.0329.v1

Redundant Space Manipulator Autonomous Guidance for In-Orbit Servicing via Deep Reinforcement Learning

Matteo D’Ambrosio, Lorenzo Capra, Andrea Brandonisio, Stefano Silvestrini, Michèle Roberta Lavagna

Subject: Engineering, Aerospace Engineering Keywords: Deep Reinforcement Learning; 7-DoF space manipulator; motion synchronization; In-Orbit Servicing

Online: 4 April 2024 (17:28:29 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202311.0629.v1

Intelligent Space Object Detect Driven by Space Object Data

Qiang Tang, Xiangwei Li, Meilin Xie, Jialiang Zhen

Subject: Computer Science And Mathematics, Computer Vision And Graphics Keywords: space object identification; deep learning; YOLO; deformable convolution

Online: 9 November 2023 (11:00:23 CET)

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Preprint ARTICLE | doi:10.20944/preprints202210.0336.v1

Does Time Smoothen Space? Implications for Space-Time Representation

Neil Sang

Subject: Environmental And Earth Sciences, Other Keywords: Discreteness; Topology; Space-Time Representation; Epistemology; Face Centered Cubic Packing

Online: 21 October 2022 (11:38:12 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202107.0310.v1

Analysis and Research on the Node Space of Ancient Villages Based on Space Syntax

Yile Chen, Junzhang Chen

Subject: Social Sciences, Anthropology Keywords: Ancient villages; historical locations; node space; convex space method, field of view analysis method, Baidu time machine; parameters

Online: 13 July 2021 (14:16:30 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202406.1482.v1

Aging Behaviors of Organic Electrophoretic Coating on Magnesium Alloy

Xiaoxue Wang, Guohui Wang, Yuan Jing, Kai Zheng, Rongqiao Wang, Xiuchun Liu, Kai Gao, Jingli Sun, Yong Yuan, Fandi Meng

Subject: Chemistry And Materials Science, Surfaces, Coatings And Films Keywords: electrophoretic coating; aging behavior; water absorption; magnesium alloy

Online: 21 June 2024 (08:11:08 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202403.0944.v1

An Enhanced Particle Swarm Optimization (PSO) Employing Quasi-Random Numbers

Shivakumar Kannan, Urmila Diwekar

Subject: Engineering, Industrial And Manufacturing Engineering Keywords: Enhanced PSO; SOBOL; Halton; Quasi-random numbers

Online: 15 March 2024 (16:00:41 CET)

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Preprint ARTICLE | doi:10.20944/preprints201909.0073.v1

Quasi-stationary Strength of ECAP-processed Cu-Zr at 0.5Tm

Wolfgang Blum, Jiri Dvorak, Petr Kral, Philip Eisenlohr, Vaclav Sklenicka

Subject: Chemistry And Materials Science, Materials Science And Technology Keywords: Cu-Zr; ECAP; deformation; quasi-stationary; subgrains; grains; coarsening

Online: 6 September 2019 (12:15:47 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201811.0473.v1

The Quasi Steady State Cosmology in a Radiation Dominated Phase

Raj Bali

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: Quasi Steady State Cosmology, Radiation Phase

Online: 19 November 2018 (16:48:10 CET)

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Preprint ARTICLE | doi:10.20944/preprints202402.0809.v5

Elementary Particles and Their Interaction with Space-Time Curvature

Eran Magshim Lavi

Subject: Physical Sciences, Particle And Field Physics Keywords: elementary particles; space-time; spacetime curvature; relativity; charges; TOE

Online: 16 August 2024 (04:48:29 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202405.0430.v1

Evolution of Space Exploration: A Statistical Analysis of Space Launches including Challenges and Future Outlook

REDDY VARUN VUNNAM

Subject: Environmental And Earth Sciences, Space And Planetary Science Keywords: Space Exploration; International Space Station; Space Debris; Space Tourism; Space Sustainability

Online: 8 May 2024 (11:58:34 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202310.1770.v1

An Exploration on a Normed Space called r-Normed Space: Some Properties and an Application

Rizal Purnawan

Subject: Computer Science And Mathematics, Analysis Keywords: r-normed space; r-norm; Lp-space; measure theory; functional analysis; coefficient of determination

Online: 27 October 2023 (11:08:25 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202405.0451.v1

A Review of Wormhole Stabilization in f(R) Gravity Theories

Ramesh Radhakrishnan, Patrick M. Brown, Jacob A. Matulevich, Eric W Davis, Delaram Mirfendereski, Gerald B Cleaver

Subject: Physical Sciences, Theoretical Physics Keywords: traversable wormhole; modified gravity; extended gravity; f(R) theory; wormhole stabilization

Online: 8 May 2024 (09:44:32 CEST)

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