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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/preprints202402.0906.v1

Comparative Life Cycle Assessment of Battery and Fuel Cell Electric Cars, Trucks and Buses

Anne Magdalene Syré, Pavlo Shyposha, Leonard Freisem, Anton Pollak, Dietmar Göhlich

Subject: Engineering, Other Keywords: Life Cycle Assessment; Electric Vehicles; Li-Ion Battery; Fuel Cell; Car; Truck; Bus; Decarbonisation

Online: 16 February 2024 (09:52:09 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/preprints202405.0290.v1

Thermo-Mechanical Uniaxial Compression of 4D Printed PLA in Wide Range of Strain Rates and Temperatures below Glass Transition Temperature T_g

Vukašin Slavković, Blaž Hanželič, Vasja Plesec, Strahinja Milenković, Gregor Harih

Subject: Engineering, Mechanical Engineering Keywords: smart materials; shape memory polymer; 4D printing; thermo-mechanical cycle

Online: 6 May 2024 (12:38:35 CEST)

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Preprint REVIEW | doi:10.20944/preprints202404.0732.v1

Review and Evaluation of Automated Charging Technologies for Heavy-Duty Vehicles

Emma Megan Piedel, Alexander Grahle, Enrico Lauth, Dietmar Göhlich

Subject: Engineering, Automotive Engineering Keywords: Heavy-duty vehicles; transport electrification; automated charging; technology readiness level

Online: 11 April 2024 (04:04:32 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202309.1002.v5

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

Kabir Umar

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

Online: 21 May 2024 (17:22:12 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202404.1243.v1

Detection of Growth Stages of Chilli Plants in a Hydroponic Grower Using Machine Vision and YOLOv8 Deep Learning Algorithms

Florian Schneider, Jonas Swiatek, Mohieddine Jelali

Subject: Engineering, Control And Systems Engineering Keywords: artificial intelligence; deep learning; YOLOv8, machine vision; image processing; indoor-farming; hydroponics; chilli plants; Capsicum annuum

Online: 18 April 2024 (10:32:10 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/preprints201701.0091.v1

Shock Pulse Index and Its Application in the Fault Diagnosis of Rolling Element Bearings

Peng Sun, Yuhe Liao, Jing Lin

Subject: Engineering, Mechanical Engineering Keywords: fault diagnosis; shock pulse index; maximum correlated kurtosis deconvolution; teager energy operator; rolling element bearings

Online: 20 January 2017 (04:12:25 CET)

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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/preprints202404.1302.v1

Reliability Assessment of Wireless Sensor Networks by strain-based Region Analysis for Redundancy Estimation in Measurements on the Example of an Aircraft Wing Box

Sören Meyer zu Westerhausen, Gurubaran Raveendran, Thorben-Hendrik Lauth, Ole Meyer, Daniel Rosemann, Max Leo Wawer, Timo Stauß, Johanna Wurst, Roland Lachmayer

Subject: Engineering, Safety, Risk, Reliability And Quality Keywords: Wireless Sensor Network; System Reliability; Measurement Redundancy; Region Growing Algorithm; Finite Elements; Strain Analysis

Online: 19 April 2024 (12:01:36 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202404.0133.v1

A Systemic Approach on Product Life Cycle for Product Development Process in Agriculture

Franciele Lourenço, Marcelo Gonçalves, Osiris Canciglieri Júnior, Izamara Palheta Dias, Guilherme Benitez, Elpidio Nara

Subject: Business, Economics And Management, Econometrics And Statistics Keywords: Sustainability Practices; Life-Cycle Assessment; Product Development Process; Market Perfor-mance; Systemic approach.

Online: 2 April 2024 (16:05:11 CEST)

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For a long time, a company's Product Development Process (PDP) was seen as supporting the operations department, although PDP decisions and mistakes have a considerable impact on market performance. This is critical even in agriculture where bad habits and practices in the PDP can lead rural producers to great losses. Therefore, this research investigated the effect on the market performance of rural products (banana) in the southern region of Brazil, based on two analyses: (i) how sustainability practices support the PDP phases and (ii) how the phases of the Product Life Cycle Assessment (LCA) mediate sustainability practices and PDP phases. This study presents a quantitative analysis using Confirmatory Factor Analysis (CFA) and hierarchical ordinary least squares (OLS) regression of data obtained from a survey of 110 rural producers who directly participate in the banana production and planning process in southern Brazil. Our results shows that sustainability practices support the PDP, and we confirm that the product development and post-development phase has an effect on market performance. In addition, we identified that in the pre-development phase of the PDP, dealing with rural products (bananas), the maturity stage of the LCA mediates sustainability. In the PDP development phase, we concluded that rural families that develop economic and environmental practices with their products in the market growth phase may have reduced results. As for the post-development phase of the PDP, we conclude that when companies invest in environmental and social practices, there is a complete mediation of the effect, where these practices lose strength if the product is in the introduction and maturity phases in the market. As originality, our study contributed to demonstrate value on the product life cycle for the product development process in agriculture using sustainability practices through a systemic approach, filling the gap in the literature due to the lack of research on these areas seen in an integrated way.

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/preprints201710.0060.v1

Bandwidth Estimation Tools and Techniques: A Review

Mukta Airon, Neeraj Gupta

Subject: Computer Science And Mathematics, Information Systems Keywords: available bandwidth estimation techniques; active bandwidth estimation techniques; passive bandwidth estimation techniques; model based bandwidth estimation techniques

Online: 10 October 2017 (10:37:41 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201611.0086.v2

Self-Aligned Interdigitated Transducers for Acoustofluidics

Zhichao Ma, Adrian J. T. Teo, Say Hwa Tan, Ye Ai, Nam-Trung Nguyen

Subject: Engineering, Mechanical Engineering Keywords: surface acoustic wave; acoustofluidics; microfluidics; interdigitated transducers

Online: 22 November 2016 (09:41:32 CET)

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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/preprints202402.0249.v1

A Positive Experience Design Model: The Product Attachment Perspective

Chunmao Wu, Lili Chen

Subject: Arts And Humanities, Other Keywords: internalising positive experiences; product attachment; designing for well-being; systematic design models

Online: 5 February 2024 (13:28:49 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/preprints201609.0034.v1

Antidermatophytic Activity of the Fruticose Lichen Usnea orientalis

Ashutosh Pathak, Anupam Dikshit

Subject: Medicine And Pharmacology, Pharmacology And Toxicology Keywords: antidermatophytic; dermatophytes; DPPH; Lichen

Online: 9 September 2016 (07:44:48 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202404.1950.v1

The Ameliorative Effect of Litsea martabanica (Kurz) Hook. f. Leaf Water Extract on Chlorpyrifos-Induced Toxicity in Rats and Its Antioxidant Potentials

Weerakit Taychaworaditsakul, Suphunwadee Sawong, Supaporn Intatham, Sunee Chansakaow, Phraepakaporn Kunnaja, Teera Chewonarin, Kanjana Jaijoy, Absorn Wittayapraparat, Pedcharada Yusuk, Seewaboon Sireeratawong

Subject: Medicine And Pharmacology, Medicine And Pharmacology Keywords: L. martabanica leaf; water extraction; antioxidant; anti-pesticide; medicinal plant; acetylcholinesterase activity; hepatoprotective; access to healthcare.

Online: 30 April 2024 (10:16:32 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/preprints202409.1062.v1

Multi-Material Topology Optimization on Separate Tetrahedral Meshes with Explicit Design Resolution by means of Remeshing

Robert Renz, Albert Albers

Subject: Engineering, Mechanical Engineering Keywords: multi-material; topology optimization; level set; remeshing; mesh adaption

Online: 14 September 2024 (10:06:41 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/preprints202402.0545.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/preprints201701.0112.v1

Effects of Potassium Titanate Whisker or Glass Fiber on Tribological and Mechanical Properties of PTFE/PEEK Blend

Xue Teng, Lefei Wen, Yunxia Lv, Wenge Tang, Xiaogang Zhao, Chunhai Chen

Subject: Chemistry And Materials Science, Polymers And Plastics Keywords: PEEK; blends; thermal stability; tribological properties; mechanical properties

Online: 25 January 2017 (10:03:49 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/preprints202402.0681.v1

Cancer-associated Systemic Abnormality: A Novel Marker Panel for Early-stage Breast Cancer Characterization

Stefan Schreier, Prapaphan Budchart, Suparerk Borwornpinyo, Lakkana Adireklarpwong, Prakasit Chirappapha, Wannapong Triampo, Panuwat Lertsithichai

Subject: Medicine And Pharmacology, Pathology And Pathobiology Keywords: early-stage breast cancer; circulating tumor cells; rare cells, liquid biopsy; systemic cancer; cytomorphology

Online: 12 February 2024 (11:37:36 CET)

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Preprint REVIEW | doi:10.20944/preprints202403.1412.v1

Adriatic Sea Fishery Product Safety, Prospective and Climate Change

Edmond Hala, Rigers Bakiu

Subject: Biology And Life Sciences, Animal Science, Veterinary Science And Zoology Keywords: fishery product safety; climate change; fishery management; Adriatic Sea; Mediterranean Sea

Online: 25 March 2024 (08:47:43 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/preprints202406.1672.v1

On Certain Rough Marcinkiewicz Integral Operators with Grafakos-Stefanov Kernels on Product Spaces

Hussain Al-Qassem, Mohammed Ali

Subject: Computer Science And Mathematics, Analysis Keywords: Lp bound; rough Marcinkiewiz integrals; surfaces of revolution; product domains; Grafakos-Stefanov class

Online: 24 June 2024 (12:04:06 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/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/preprints202402.1194.v2

Collaborative Smart Production Supply Chains with Blockchain Based Digital Product Passports

Fatemeh Stodt, Nicolai Maisch, Philipp Ruf, Armin Lechler, Oliver Riedel, Christoph Reich

Subject: Computer Science And Mathematics, Security Systems Keywords: digital product passport; blockchain; GAIA-X; traceability; interoperability; privacy and security; circular economy; smart industries

Online: 10 May 2024 (11:14:17 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/preprints202405.0743.v1

Microtextural Characteristics of Ultramafic Rock-Forming Minerals and Their Effects on Carbon Sequestration

Tadsuda Taksavasu, Piyanat Arin, Thanakon Khatecha, Suchanya Kojinok

Subject: Environmental And Earth Sciences, Environmental Science Keywords: carbon sequestration; climate action; enhanced rock weathering (ERW); mineralization; natural-based materials

Online: 13 May 2024 (07:51:09 CEST)

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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/preprints202407.2285.v1

Comparative Study on the Interest of NURBS Representation Versus Polynomial Surface Description in Freeform TMA

Clément Freslier, Guillaume Druart, Alice Fontbonne, Thierry Lepine, Christophe Buisset, Tibor Agocs, Arnaud Hélière, Fanny Keller, Jean-Baptiste Volatier, Stéphane Beaussier, Paul Jougla

Subject: Physical Sciences, Optics And Photonics Keywords: optimization; freeform; NURBS; differential ray tracer; XY polynomials; TMA

Online: 29 July 2024 (10:14:59 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201810.0100.v1

Joint Power and Bandwidth Allocation for UAV Backhaul Networks: A Hierarchical Learning Approach

Tingting Yang, Kailing Yao, Youming Sun, Fei Song, Yang Yang, Yuli Zhang

Subject: Engineering, Electrical And Electronic Engineering Keywords: UAV backhaul networks; Stackelberg game; delay durance; resource allocation; energy efficiency

Online: 5 October 2018 (12:58:17 CEST)

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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/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/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/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/preprints202111.0025.v1

Using the Packet Header Redundant Fields to Improve VoIP Bandwidth Utilization

Manjur Kolhar

Subject: Engineering, Electrical And Electronic Engineering Keywords: Bandwidth Employment; Real time protocol; TCP; header reduced

Online: 1 November 2021 (15:52:52 CET)

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Preprint ARTICLE | doi:10.20944/preprints201701.0024.v1

Effect of Short Term Water Exposure on the Mechanical Properties of Halloysite Nanotubes-Multi Layer Graphene Reinforced Polyester Nanocomposites

Mohd Shahneel Saharudin, Rasheed Atif, Fawad Inam

Subject: Chemistry And Materials Science, Polymers And Plastics Keywords: nanocomposites; halloysite nanotubes; multi-layer graphene; water absorption; mechanical properties

Online: 5 January 2017 (09:34:10 CET)

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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/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/preprints202404.1060.v1

The Platform Technology Approach to mRNA Product Development and Regulation

John Howard SKERRITT, Carolyn Tucek-Szabo, Brett Sutton, Terry Nolan

Subject: Medicine And Pharmacology, Medicine And Pharmacology Keywords: mRNA, vaccine development, drug development, regulation

Online: 16 April 2024 (13:56:02 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202403.1057.v1

Disruptive Factors in Product Portfolio Management: A Qualitative Exploratory Study in B2B Manufacturing

Till Gramberg, Thomas Bauernhansl, Andreas Eggert

Subject: Business, Economics And Management, Business And Management Keywords: product portfolio management; disruption; digitalization; sustainability; servitization; generative artificial intelligence; decision-making; value-oriented; business model; b2b; manufacturing

Online: 18 March 2024 (14:31:51 CET)

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Preprint ARTICLE | doi:10.20944/preprints201811.0367.v1

Some Bounds on Eigenvalues of the Hadamard Product and the Fan Product of Matrices

Qianping Guo, Jinsong Leng, Houbiao Li, Carlo Cattani

Subject: Computer Science And Mathematics, Mathematics Keywords: Hadamard product; Nonnegative matrices; Spectral radius; Fan product; M-matrix; Inverse $M$-matrix; Minimum eigenvalue

Online: 15 November 2018 (15:34:44 CET)

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Preprint ARTICLE | doi:10.20944/preprints202408.0024.v1

Comparative Analysis of Machine Learning and Deep Learning Algorithms for Assessing Agricultural Product Quality Using NIRS

Jiwen Ren, Yuming Xiong, Xinyu Chen, Yong Hao

Subject: Biology And Life Sciences, Food Science And Technology Keywords: Gramian Angular Difference Field; Convolutional Neural Networks; Near-infrared spectroscopy; Coordinate Attention; Robust model

Online: 2 August 2024 (05:24:26 CEST)

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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/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 ARTICLE | doi:10.20944/preprints202402.0539.v1

Restricted Singular Value Decomposition for a Tensor Triplet under T-product and Its Applications

Chong-Quan Zhang, Qing-Wen Wang, Xiang-Xiang Wang, Zhuo-Heng He

Subject: Physical Sciences, Mathematical Physics Keywords: Multilinear algebra; restricted singular value decomposition; tensor SVD

Online: 9 February 2024 (10:03:47 CET)

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Preprint ARTICLE | doi:10.20944/preprints202408.1116.v1

An Extreme Learning Machine Stock Price Prediction Algorithm Based on the Optimisation of the Crown Porcupine Optimisation Algorithm with an Adaptive Bandwidth Kernel Function Density Estimation Algorithm

Keke Yu, Qiaozhi Bao, Haosen Xu, Guanghe Cao, Siwei Xia

Subject: Computer Science And Mathematics, Artificial Intelligence And Machine Learning Keywords: Extreme learning machine; Crown porcupine optimisation algorithm; Adaptive bandwidth kernel function density estimation algorithm

Online: 15 August 2024 (22:47:30 CEST)

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Preprint COMMUNICATION | doi:10.20944/preprints201904.0220.v1

Super-Wide Impedance Bandwidth Planar Antenna Based on Metamaterial Concept for Microwave and Millimetre-Wave Applications

Mohammad Alibakhshikenari, Bal S. Singh, Chan H. See, Raed A. Abd-Alhameed, Francisco Falcone, Ernesto Limiti

Subject: Engineering, Electrical And Electronic Engineering Keywords: array antenna Microstrip Patch Antenna (MPA); slot antenna; metamaterial; Multiple-Output Multiple-Input (MIMO); radar; RFID systems; millimetre-wave band

Online: 19 April 2019 (11:36:12 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/preprints202403.1350.v1

Bioassay-Guided Isolation of Dehydrocostus Lactone from Echinops kebericho as a Leishmanicidal Drug

Bekri Melka Abdo, Bizuayehu Tesfaye-Asfaw, Mahammed Iqbal Choudhary, Sammer Yousuf, Wendawek Abebe Mengesha, Solomon Abate Mekonen

Subject: Chemistry And Materials Science, Organic Chemistry Keywords: Bioassay; Dehydrocostus lactone; Echinops kebericho; Leishmaniasis

Online: 22 March 2024 (06:32:21 CET)

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Preprint ARTICLE | doi:10.20944/preprints202306.0744.v1

Capacitive Effect and Electromagnetic Coupling on Manganin Gauge Limiting the Bandwidth for Pressure Measurements under Shock Conditions

Antony Coustou, Alexandre Lefrançois, Patrick Pons, Yohan Barbarin

Subject: Engineering, Electrical And Electronic Engineering Keywords: piezoresistivity; shock properties; manganin gauge; metrology; shock pressure; capacitive effect; electromagnetic coupling

Online: 12 June 2023 (03:27:36 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202101.0529.v1

All-Optical RF and Microwave Spectrum Analyzer with a 5 THz Bandwidth Based on CMOS-Compatible Waveguides

Yuhua Li, Zhe Kang, Kun Zhu, Shiqi Ai, Xiang Wang, Roy Davidson, Yan Wu Yan Wu, Roberto Morandotti, Brent Little, David Moss, Sai Chu

Subject: Engineering, Automotive Engineering Keywords: radio frequency; microwave; spectrum analyzer; integrated; photonic

Online: 26 January 2021 (09:57:01 CET)

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Preprint ARTICLE | doi:10.20944/preprints202010.0618.v1

Ultra-High Bandwidth Optical Data Transmission Based on a 49GHz Kerr Soliton Crystal Microcomb

Mengxi Tan, Bill Corcoran, Xingyuan Xu, Jiayang Wu, Andreas Boes, Thach Nguyen, Sai Chu, Brent Little, Roberto Morandotti, Arnan Mitchell, David Moss

Subject: Engineering, Automotive Engineering Keywords: optical data communications; fiber optics; microcombs; ultrahigh bandwidth data transmission

Online: 29 October 2020 (14:34:21 CET)

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Preprint ARTICLE | doi:10.20944/preprints201711.0097.v1

Inequalities for Hypo-q-Norms on a Cartesian Product of Inner Product Spaces

Silvestru Dragomir

Subject: Computer Science And Mathematics, Analysis Keywords: hypo-q-norms, Cartesian product

Online: 15 November 2017 (17:00:56 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 REVIEW | doi:10.20944/preprints201609.0013.v1

Tea Polysaccharides and Their Bioactivities

Ling-Ling Du, Qiu-Yue Fu, Li-Ping Xiang, Xin-Qiang Zheng, Jian-Liang Lu, Jian-Hui Ye, Qing-Sheng Li, Curt Anthony Polito, Yue-Rong Liang

Subject: Biology And Life Sciences, Biochemistry And Molecular Biology Keywords: Camellia sinensis; tea ploysaccharides; chemical composition; antioxidant; antitumors; antihyperglycemia; anti-inflammation

Online: 5 September 2016 (10:19:33 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/preprints202407.1938.v1

Comparative Analysis of Microbial Diversity and Metabolic Profiles during the Spontaneous Fermentation of Jerusalem Artichoke (Helianthus tuberosus L.) Juice

Tiandi Zhu, Zhongwang Li, Xinxing Liu, Chen Chen, Yuwen Mu

Subject: Biology And Life Sciences, Food Science And Technology Keywords: Jerusalem artichoke; Spontaneous fermentation; Microbial diversity; Secondary metabolites; Flavor compounds

Online: 24 July 2024 (11:49:36 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202406.0387.v1

Thermophysical Characterization of Materials for Energy-Efficient Double Diaphragm Preforming

Srikara Dandangi, Mohammad Ravandi, Jamal Naser, Adriano Di Pietro

Subject: Engineering, Mechanical Engineering Keywords: ; through thickness thermal conductivity; specific heat; woven carbon fabrics; thermoplastic binder; silicone; double diaphragm preforming ;

Online: 7 June 2024 (07:30:17 CEST)

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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/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/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 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/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/preprints202407.0297.v1

Minimization of Bandwidth for Required End-to-End Latency Implementing IRS in a 6G Network

Mobasshir Mahbub, Raed M. Shubair

Subject: Engineering, Electrical And Electronic Engineering Keywords: 6G; IRS; HetNet

Online: 3 July 2024 (11:57:06 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202406.1219.v1

Usefulness of Perioperative Nutritional Therapy with the Glutamine/Arginine/Calcium β-Hydroxy-β-Methylbutyrate Product in Esophageal Cancer Surgery: A Single-Center Retrospective Study

Koichi Okamoto, Hiroyuki Takamura, Taigo Nagayama, Yuta Sannomiya, Akifumi Hashimoto, Hisashi Nishiki, Daisuke Kaida, Takashi Miyata, Toshikatsu Tsuji, Hideto Fujita, Shinichi Kinami, Itasu Ninomiya, Noriyuki Inaki

Subject: Medicine And Pharmacology, Surgery Keywords: esophageal cancer; minimally invasive esophagectomy; complication; sarcopenia

Online: 18 June 2024 (11:29:15 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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