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Preprint ARTICLE | doi:10.20944/preprints202209.0444.v1

Reciprocity and Representations for Wave Fields in 3D Inhomogeneous Parity-Time Symmetric Materials

Kees Wapenaar, Evert Slob

Subject: Physical Sciences, Applied Physics Keywords: parity-time symmetry; reciprocity; Green’s matrix; metamaterials

Online: 28 September 2022 (13:27:56 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202209.0443.v1

A Non-inductive Magnetic Eye-Tracker: From Dipole Tracking to Gaze Retrieval

Valerio Biancalana, Piero Chessa

Subject: Physical Sciences, Applied Physics Keywords: Eye Tracking; Magnetic tracker; Magnetic Sensor; Sensor Array; eye motion; Donders' Law; Listing's law

Online: 28 September 2022 (12:30:28 CEST)

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Preprint REVIEW | doi:10.20944/preprints202209.0385.v1

A Review of Thermal Spectral Imaging Methods for Monitoring High-temperature Molten Material Streams

Katarina Grujic

Subject: Physical Sciences, Applied Physics Keywords: spectral imaging; metallurgy; infrared thermography; pyrometry; temperature measurement; flow rate

Online: 26 September 2022 (08:47:38 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202209.0374.v1

Towards Innovative Solutions for Monitoring Precipitation in Poorly Instrumented Regions: Real-Time System for Collecting Power Levels of Microwave Links of Mobile Phone Operators for Rainfall Quantification in Burkina Faso

Moumouni Djibo, Wend-Yam Serge Boris Ouédraogo, Ali Doumounia, Serge Roland Sanou, Moumouni Sawadogo, Idrissa Guira, Nikola Koné, Christian Chwala, Harald Kunstmann, François Zougmoré

Subject: Physical Sciences, Applied Physics Keywords: Commercial microwave links; Power level; SNMP protocol; Acquisition system; Rainfall estimation

Online: 26 September 2022 (02:05:11 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202209.0337.v1

Elemental Laser-Plasma Analysis of Pointed Gourd Leaves for Diabetes Management

Tejmani Kumar, Prashant K Rai, Abhishek K Rai, Nilesh K Rai, Awadhesh K Rai, Christian Parigger, Geeta Watal, Suman Yadav

Subject: Physical Sciences, Applied Physics Keywords: optical emission spectroscopy; laser induced optical breakdown; trichosanthes dioica; pointed gourd; diabetes; biomedicine; biophysics

Online: 22 September 2022 (09:41:00 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202209.0257.v1

Nature’s Wind Turbines: The Measured Aerodynamic Efficiency of Spinning Seeds Approaches Theoretical Limits

Timothy Molteno

Subject: Physical Sciences, Applied Physics Keywords: Betz Limit; Aerodynamic Efficiency; Biomimicry

Online: 19 September 2022 (03:47:02 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202209.0225.v1

Quantum Mechanical Comparison between Lithiated and Sodiated Silicon Nanowires

Donald Boone

Subject: Physical Sciences, Applied Physics Keywords: lithium; sodium; silicon; nanowire; quantum mechanics

Online: 15 September 2022 (08:47:32 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202208.0521.v1

Exciton-Assisted UV Stimulated Emission with Incoherent Feedback in Polydisperse Crystalline ZnO Powder

Leonid Fedorenko, Volodymyr Litovchenko, Vadym Naumov, Dmytro Korbutyak, Volodymyr Yukhymchuk, Olexander Gudymenko, Olexander Dubikovskyi, Hidenori Mimura, Arturs Medvids

Subject: Physical Sciences, Applied Physics Keywords: ZnO crystallite; random laser; excitons; stimulated emission; polydisperse powder; thin film; hexagonal microdisks; monodisperse nano-powder; nanophotonics

Online: 30 August 2022 (10:45:02 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202208.0050.v1

Did Maxwell Dream of Electrical Bacteria?

Eleonora Alfinito, Maura Cesaria, Matteo Beccaria

Subject: Physical Sciences, Applied Physics Keywords: quorum sensing; resistance random network; complex networks

Online: 2 August 2022 (08:21:25 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202208.0034.v1

High Sensitivity Sers Substrate of A Few Nanometers Single-Layer Silver Thickness Fabricated by DC Magnetron Sputtering Technology

Hsing-Yu Wu, Hung-Chun Lin, Guan-Yi Hung, Chi-Shun Tu, Ting-Yu Liu, Chung-Hung Hong, Guoyu Yu, Jin-Cherng Hsu

Subject: Physical Sciences, Applied Physics Keywords: surface-enhanced Raman scattering (SERS); silver nanoparticle (AgNP); rhodamine 6G (R6G); dc magnetron sputtering; SERS substrate; hotspot; analytical enhancement factor (AEF); limit of detection (LOD); relative standard deviation (RSD)

Online: 2 August 2022 (04:23:31 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202207.0288.v1

Design, Construction and Characterization of Sealed Tube Medium Power CO₂ Laser System

Muddasir Naeem, Tayyab Imran, Mukhtar Hussain, Arshad Saleem Bhatti

Subject: Physical Sciences, Applied Physics Keywords: ZEMAX; Thermoelectric coolers; Flyback transformer; High tension pump source; Penetration depth

Online: 19 July 2022 (13:28:19 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202207.0284.v1

Orbital and Spin Dynamics of Electron’s States Transition in Hydrogen Atom Driven by Electric Field

Ciann-Dong Yang, Shiang-Yi Han

Subject: Physical Sciences, Applied Physics Keywords: two-level transition; electron dynamics; spin dynamics; spin angular momentum perturbation

Online: 19 July 2022 (09:53:58 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202207.0159.v1

Marchenko Green's Function Retrieval in Layered Elastic Media from Two-Sided Reflection and Transmission Data

Joost Van Der Neut, Joeri Brackenhoff, Giovanni Meles, Evert Slob, Kees Wapenaar

Subject: Physical Sciences, Applied Physics Keywords: Marchenko equation; Green's function retrieval; elastodynamic wave propagation

Online: 11 July 2022 (11:19:01 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202206.0128.v1

Structural and Dynamical Properties of Liquid Water Increase Turbulent Flows

Arturo Tozzi, James Peters, Lucio Mariniello

Subject: Physical Sciences, Applied Physics Keywords: Reynold number; high-density water; molecular dynamics; water model; percolation theory

Online: 8 June 2022 (12:24:33 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202205.0382.v1

Aerodynamic Shape and Drag Scaling Laws of Flexible Fibre in Flowing Medium

Bohua Sun, Xiao-Lin Guo

Subject: Physical Sciences, Applied Physics Keywords: flexible fibre; flow medium; aerodynamic shape; drag; scaling laws

Online: 27 May 2022 (10:46:59 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202205.0322.v1

On the Pull-out Mechanical Properties of the Diabolical Ironclad Beetle Bionic Jigsaw Connection

Jie Wei, Bohua Sun

Subject: Physical Sciences, Applied Physics Keywords: Theoretical analysis; bionics; jigsaw connection; 3D Printing; ﬁnite element

Online: 24 May 2022 (05:06:18 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202205.0317.v1

Planar Strained Layer Superlattice Infrared Photodetectors Fabricated by Ion-Implantation

Arash Dehzangi

Subject: Physical Sciences, Applied Physics Keywords: Ion Implantation; Planar photodetectors; Strained layer superlattice; Quantum efficiency; Ion implantation energy

Online: 24 May 2022 (04:16:21 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202205.0090.v1

An Ice Microphysics-Based Machine Learning Approach to Classify Precipitation Type over Land from Global Precipitation Measurement Microwave Imager (GPM-GMI) Measurements

Spandan Das, Yiding Wang, Jie Gong, Leah Ding, Stephen Joe Munchak, Chenxi Wang, Dong Wu, Liang Liao, William S. Olson, Donifan O. Barahona

Subject: Physical Sciences, Applied Physics Keywords: machine learning/artificial intelligence; precipitation type classification; passive microwave; precipitation radar; retrieval algorithm

Online: 7 May 2022 (03:46:06 CEST)

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Precipitation type is a key parameter used for better retrieval of precipitation characteristics as well as to understand the cloud-convection-precipitation coupling processes. Ice crystals and water droplets inherently exhibit different characteristics in different precipitation regimes (e.g., convection, stratiform), which reflect on satellite remote sensing measurements that help us distinguish them. The Global Precipitation Measurement (GPM) Core Observatory’s Microwave Imager (GMI) and Dual-Frequency Precipitation Radar (DPR) together provide ample information on global precipitation characteristics. As an active sensor, DPR provides an accurate precipitation type assignment, while passive sensors like GMI are traditionally only used for empirical understanding of precipitation regimes. Using collocated precipitation type flags from DPR as the “truth”, this paper employs machine learning (ML) models to train and test the predictability and accuracy of using passive GMI-only observations together with ancillary information from reanalysis and GMI surface emissivity retrieval products. Out of six ML models, four simple ones (Support Vector Machine, Neural Network, Random Forest, and Gradient Boosting) and the 1-D convolutional neural network (CNN) model are identified to produce 90% - 94% prediction accuracy globally for 5 types of precipitation (convective, stratiform, mixture, no precipitation, and other precipitation), which is much more robust than previous similar effort. One novelty of this work is to introduce data augmentation (subsampling and bootstrapping) to handle extremely unbalanced samples in each category. Careful evaluation of Impact matrices demonstrate that polarization difference (PD) and surface emissivity at high-frequency channels dominate the decision process, which are consistent with the physical understanding of polarized microwave radiative transfer over different surface types, as well as in snow and liquid clouds with different microphysical properties. Furthermore, the view-angle dependency artifact that DPR precipitation flag bears with does not propagate into the conical-viewing GMI retrievals. This work provides a new and promising way for future physics-based ML retrieval algorithm development.

Preprint ARTICLE | doi:10.20944/preprints202205.0085.v1

Calorimetric Testing of Solar Thermal Absorbers for High Vacuum Flat Panels

Carmine D’Alessandro, Davide De Maio, Antonio Caldarelli, Marilena Musto, Francesco Di Giamberardino, Matteo Monti, Teresa Mundo, Emiliano Di Gennaro, Roberto Russo, Vittorio G. Palmieri

Subject: Physical Sciences, Applied Physics Keywords: Selective Solar Absorber; Solar Absorptance; Thermal Emittance; Evacuated Flat Panel; Calorimeter; High Vacuum Flat Panel; Solar Simulator

Online: 7 May 2022 (02:52:12 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202204.0286.v1

Mechanical Property Analysis of Cuttlebone-like Structure under Compression and Shearing

Fan Wu, Bohua Sun

Subject: Physical Sciences, Applied Physics Keywords: Cuttlebone-like structure; Bionic structure; Finite element analysis; 3D Printing; Compression; Shearing

Online: 29 April 2022 (04:06:24 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202204.0262.v1

Clamping Force of A Multilayered Cylindrical Clamp with Internal Friction

Bohua Sun, Xiao-Lin Guo

Subject: Physical Sciences, Applied Physics Keywords: Clamping force; multilayer clamp; curvature; bending; friction; dissipation; deflection

Online: 27 April 2022 (11:35:03 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202204.0178.v1

Cylindrical Bending of A Hardcover Book with Internal Friction

Bohua Sun, Wen Dang, Xuanting Liu, Xiao-Lin Guo

Subject: Physical Sciences, Applied Physics Keywords: Hardcover book; multilayer; plates; curvature; bending; friction; dissipation; deflection

Online: 19 April 2022 (07:48:16 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202204.0023.v1

A Hybrid Self-Seeded Ti:sapphire Laser with a Pumping Scheme Based on Spectral Beam Combination of Continuous-Wave Diode and Pulsed DPSS Lasers

Volker Thomas Sonnenschein, Hideki Tomita

Subject: Physical Sciences, Applied Physics Keywords: Ti:sapphire laser; amplifier; injection-lock; Diode pumping; solid state laser

Online: 5 April 2022 (09:51:04 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202204.0018.v1

Suspended Water Droplet Confined Laser Shock Processing at Elevated Temperatures

Jian Liu, Xiaohan Zhang, Yali He, Zhe Zhao, Min Xia, Yaowu Hu

Subject: Physical Sciences, Applied Physics Keywords: Droplet; Laser shock; High temperatures; Dynamics; Focusing enhancement

Online: 4 April 2022 (12:02:37 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202203.0310.v1

Avoiding the Great Filter: Predicting the Timeline for Humanity to Reach Kardashev Type I Civilization

Jonathan H. Jiang, Fuyang Feng, Philip E. Rosen, Kristen A. Fahy, Antong Zhang, Piotr Obacz, Prithwis Das, Zong-Hong Zhu

Subject: Physical Sciences, Applied Physics Keywords: Kardashev scale; civilization; energy consumption and supply

Online: 23 March 2022 (05:19:37 CET)

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Preprint ARTICLE | doi:10.20944/preprints202202.0323.v1

Evaluation of Face Shields, Goggles and Safety Glasses as a Virus Transmission Control Measure to Protect the Wearer Against Cough Droplets

Samantha Hall, Paul Johnson, Claire Bailey, Zoe Gould, Robert White, Brian Crook

Subject: Physical Sciences, Applied Physics Keywords: face shield; goggles; safety glasses; cough; droplets; virus transmission; COVID 19; exposure

Online: 25 February 2022 (06:52:12 CET)

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Face shields (also referred to as visors), goggles and safety glasses have been worn during the COVID-19 pandemic as one measure to control transmission of the virus. However, their effectiveness in controlling facial exposure to cough droplets is not well established and standard tests for evaluating eye protection for this application are limited. A method was developed to evaluate face shields, goggles and safety glasses as a control measure to protect the wearer against cough droplets. The method uses a semi-quantitative assessment of facial droplet deposition. A cough simulator was developed to generate droplets comparable to those from a human cough. The droplets consisted of a UV fluorescent marker (fluorescein) in water. Fourteen face shields, four pairs of goggles and one pair of safety glasses were evaluated by mounting them on two different sizes of breathing manikin head and challenging them with the simulated cough. The manikin head was positioned in seven orientations relative to the cough simulator to represent various potential occupational exposure scenarios, for example, a nurse standing over a patient. Droplet deposition in the eyes, nose and mouth regions were visualised following three ‘coughs’. Face shields, goggles and safety glasses reduced, but did not eliminate exposure to the wearer from droplets such as those produced by a human cough. The level of protection differed based on the design of the personal protective equipment and the relative orientation of the wearer to the cough. For example, face shields and goggles offered the greatest protection when a cough challenge was face on or from above and the least protection when a cough challenge was from below. Face shields were also evaluated as source control to protect others from the wearer. Results suggested that if a coughing person wears a face shield, it can provide some protection from cough droplets to those standing directly in front of the wearer.

Preprint ARTICLE | doi:10.20944/preprints202202.0037.v1

Investigation of Elastic Properties of WO3 Thin Films Supported on Quartz in SAW Sensing Devices

Madjid Arab, Véronique Madigou, Virginie Chevallier, Christian Turquat, Christine Leroux

Subject: Physical Sciences, Applied Physics Keywords: SAW devices; Tungsten trioxide; FEM/BEM; Harmonic admittance; elastic properties

Online: 2 February 2022 (14:53:27 CET)

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Preprint ARTICLE | doi:10.20944/preprints202201.0175.v1

Equivalent Electronic Circuit of a System of Oscillators Connected With Periodically Variable Stiffness

Soumyajit Seth, Grzegorz Kudra, Krzysztof Witkowski, Jan Awrejcewicz

Subject: Physical Sciences, Applied Physics Keywords: Parametric excitation; Dry-Friction; Magnetic Spring Force; Electronic circuit

Online: 12 January 2022 (14:33:34 CET)

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Preprint SHORT NOTE | doi:10.20944/preprints202201.0166.v1

Two Notes on the Theoretical Physics of ATP Synthase

Archit Chaturvedi

Subject: Physical Sciences, Applied Physics Keywords: Theoretical Biophysics; Mathematical Biophysics; Theoretical Biology; Molecular Biophysics

Online: 12 January 2022 (13:38:59 CET)

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Preprint ARTICLE | doi:10.20944/preprints202201.0076.v1

Assembly and Disassembly Mechanics of a Cylindrical Snap Fit

Xiao-Lin Guo, Bohua Sun

Subject: Physical Sciences, Applied Physics Keywords: Snap fit, elasticity, friction, geometry, beam, symmetry breaks

Online: 6 January 2022 (11:36:39 CET)

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Preprint ARTICLE | doi:10.20944/preprints202112.0436.v1

Reaction Center of Rhodobacter Sphaeroides, a Photoactive Protein for pH Sensing: A Theoretical Investigation of Charge Transport Properties

Eleonora Alfinito, Lino Reggiani

Subject: Physical Sciences, Applied Physics Keywords: photosensitive protein; electrical response; theoretical modelling; CAFM; EIS

Online: 27 December 2021 (15:48:20 CET)

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Preprint ARTICLE | doi:10.20944/preprints202112.0434.v1

Phase Optimization for Multipoint Haptic Feedback Based on Ultrasound Array

Zhili Long, Shuyuan Ye, Zhao Peng, Yuyang Yuan, Zhouhua Li

Subject: Physical Sciences, Applied Physics Keywords: Haptic feedback, Phase optimization, Pseudo-inverse algorithm, Ultrasound array.

Online: 27 December 2021 (14:54:16 CET)

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Preprint ARTICLE | doi:10.20944/preprints202112.0277.v1

Change of Persistence in European Electricity Spot Prices

Leonardo Rydin Gorjão, Dirk Witthaut, Pedro G. Lind, Wided Medjroubi

Subject: Physical Sciences, Applied Physics Keywords: Electricity spot markets; EPEX; Nord Pool; Increment statistics; Persistence; Hurst coefficient; Detrended Fluctuation Analysis; Kramers–Moyal equation

Online: 16 December 2021 (15:04:09 CET)

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Preprint ARTICLE | doi:10.20944/preprints202112.0275.v1

Approximating the Steady-state Temperature of 3D Electronic Systems with Convolutional Neural Networks

Monika Stipsitz, Hèlios Sanchis-Alepuz

Subject: Physical Sciences, Applied Physics Keywords: Physics simulations; Neural Networks; Electronic design; Heat equation

Online: 16 December 2021 (14:55:05 CET)

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Preprint ARTICLE | doi:10.20944/preprints202112.0042.v1

How to Surpass the Deep-Sea Glass Sponges Mechanically

Quan-Wei Li, Bohua Sun

Subject: Physical Sciences, Applied Physics Keywords: Bioinspired materials; Lattice structure; Euplectella aspergillum; Buckling; Optimization

Online: 3 December 2021 (09:45:28 CET)

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Preprint ARTICLE | doi:10.20944/preprints202103.0349.v3

Geometry-Induced Rigidity in Elastic Torus from Circular to Oblique Elliptic Cross-Section

Bohua Sun

Subject: Physical Sciences, Applied Physics Keywords: elliptic torus; oblique; nonlinear deformation; vibration; Gauss curvature; Maple

Online: 25 November 2021 (11:21:55 CET)

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Preprint ARTICLE | doi:10.20944/preprints202110.0449.v1

Vis and NIR Diffused Reflectance Study in Disordered Bismuth Manganate ‒ Lead Titanate Ceramics

Andrzej Molak, Anna Z. Szeremeta, Janusz Koperski

Subject: Physical Sciences, Applied Physics Keywords: bismuth manganite; ceramics; composite; lead titanate; optical energy gap; surface morphology; Vis-NIR reflectance

Online: 29 October 2021 (10:13:45 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202110.0393.v1

Appraisal of Drought Indices based on Climatic Variability using DrinC Software for Potwar Region in Punjab Pakistan during 1981–2019

Saira Batool, Syed Amer Mahmood, Safdar Ali Shirazi

Subject: Physical Sciences, Applied Physics Keywords: Drought indices; SPI; RDI; Climate variables; DrinC; Potwar; Pakistan

Online: 26 October 2021 (15:39:16 CEST)

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Preprint REVIEW | doi:10.20944/preprints202110.0106.v1

Combined Ketogenic Diet and Walking Exercise Interventions in Community Older Groups

Jia-Ping Wu

Subject: Physical Sciences, Applied Physics Keywords: ketogenic diet; exercise therapy; community health planning; natural; exercise intervention

Online: 6 October 2021 (12:40:59 CEST)

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Working Paper ARTICLE

Probing Electron Properties in ECR Plasmas Using X-Ray Bremsstrahlung and Fluorescence Emission

Bharat Mishra, Angelo Pidatella, Alessio Galatà, Sándor Biri, Richárd Rácz, Eugenia Naselli, Maria Mazzaglia, Giuseppe Torrisi, David Mascali

Subject: Physical Sciences, Applied Physics Keywords: ECR plasmas; warm electrons; self-consistent simulations; experimental benchmarking; volumetric and space-resolved spectra; X-ray fluorescence; bremsstrahlung; ray-tracing Monte Carlo techniques

Online: 5 October 2021 (08:58:06 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202110.0040.v1

Comprehensive Study for Impure and Pure Casts of Aluminum and Copper

Raiq Al-Nima, Mahmood Al-jiboori

Subject: Physical Sciences, Applied Physics Keywords: Casts; Aluminum; Copper; Mechanical Tests

Online: 4 October 2021 (10:28:57 CEST)

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Working Paper ARTICLE

Hybrid Classical-Quantum Fitting Attention States to Statistical Mechanics of Neocortical Interactions

Lester Ingber

Subject: Physical Sciences, Applied Physics Keywords: path integral; quantum systems; neocortical interactions

Online: 1 October 2021 (10:16:43 CEST)

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Several commerical quantum computers are now available that offer Hybrid Classical-Quantum computing. Application is made to a classical-quantum model of human neocortex, Statistical Mechanics of Neocortical Interactions (SMNI), which has had its applications published in many papers since 1981. However, this project only uses Classical (super-)computers. Since 2015, PATHINT, has been used as a numerical algorithm for folding path-integrals. Applications in several systems in several disciplines has generalized been from 1 dimension to N dimensions, and from classical to quantum systems, qPATHINT. Papers have applied qPATHINT to neocortical interactions and financial options. The classical space described by SMNI applies nonlinear nonequilibrium multivariate statistical mechanics to synaptic neuronal interactions, while the quantum space described by qPATHINT applies synaptic contributions from Ca2+ waves generated by astrocytes at tripartite neuron-astrocyte-neuron sites. Previous SMNI publications since 2013 have calculated the astrocyte Ca2+ wave synaptic interactions from a closed-form (analytic) expression derived by the author. However, more realistic random shocks to the Ca2+ waves from ions entering and leaving these wave packets should be included using qPATHINT between electroencephalographic (EEG) measurements which decohere the quantum wave packets. This current project extends calculations to multiple scales of interaction between classical events and expectations over the Ca2+ quantum processes to include these random shocks to fit EEG data to the SMNI model, with previous analytic forms for the quantum processes replaced by qPATHINT. The classical-quantum system is fit using the author's Adaptive Simulated Annealing (ASA) importance-sampling optimization code. Gaussian Quadratures are used for numerical calculation of momenta expectations of the astrocyte processes that contribute to SMNI synaptic interactions. This project demonstrates how some hybrid classical-quantum systems may be calculated using only classical (super-)computers. Recent calculations also are reported using the closed-form expression, with and without shocks.

Preprint ARTICLE | doi:10.20944/preprints202109.0487.v1

Measurement of Adult Human Brain Responses to Breath Holding by Multi-Distance Hyperspectral Near-Infrared Spectroscopy

Zahida Guerouah, Steve Lin, Vladislav Toronov

Subject: Physical Sciences, Applied Physics Keywords: near-infrared spectroscopy; brain; BOLD signal; breath holding; cytochrome C oxidase

Online: 29 September 2021 (10:50:12 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202109.0435.v1

Vector Potential, Magnetic Field, Mutual Inductance, Magnetic Force, Torque and Stiffness Calculation between Current-Carrying Arc Segments with Inclined Axes in Air

Slobodan Babic

Subject: Physical Sciences, Applied Physics Keywords: Magnetic vector potential; magnetic field; mutual inductance; magnetic force; torque; stiffness

Online: 24 September 2021 (12:56:12 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202109.0384.v1

ZRO Drift Reduction of MEMS Gyroscopes via Internal and Packaging Stress Release

Pengfei Xu, Zhenyu Wei, Lu Jia, Yongmei Zhao, Guowei Han, Chaowei Si, Jin Ning, Fuhua Yang

Subject: Physical Sciences, Applied Physics Keywords: ZRO drift; MEMS gyroscope; internal and packaging stresses; finite element analysis; stress release

Online: 22 September 2021 (13:24:41 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202109.0214.v1

Dynamic Effective Elasticity of Melanoma Cells Under Shear and Elongational Flow Confirms Estimation From Force Spectroscopy

Anna Martina Jötten, Simon Neidinger, Julia K. Tietze, Julia Welzel, Christoph Westerhausen

Subject: Physical Sciences, Applied Physics Keywords: melanoma cells; elasticity; AFM; microfludics; force spectroscopy

Online: 13 September 2021 (14:14:47 CEST)

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Working Paper ARTICLE

Theoretical Calculation of Wind (Or Water) Turbine: Extending the Betz Limit

Pierre Lecanu, joel Breard, Dominique Mouaze, Bertil Smorgrav

Subject: Physical Sciences, Applied Physics Keywords: n/a; wind turbine; tidal turbine; betz limit; Betz's law; HAWT; VAWT; potential energy; kinetic energy

Online: 27 August 2021 (11:15:35 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202107.0264.v1

A Novel High-Q Dual Mass MEMS Tuning Fork Gyroscope Based On 3D Wafer-Level Packaging

Pengfei Xu, Yurong He, Zhenyu Wei, Lu Jia, Guowei Han, Chaowei Si, Jin Ning, Fuhua Yang

Subject: Physical Sciences, Applied Physics Keywords: Tuning fork gyroscope; MEMS; 3D packaging; high Q-factors

Online: 12 July 2021 (13:43:38 CEST)

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Preprint HYPOTHESIS | doi:10.20944/preprints202105.0234.v3

Rethinking Life and Predicting Its Origin

Diogo Gonçalves

Subject: Physical Sciences, Applied Physics Keywords: Theory of Life; Definition of Life; Origin of Life; Electron Bifurcation; Hydrothermal Vents; Biophysics; Biological Physics

Online: 16 June 2021 (11:30:35 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202106.0219.v1

Radical Reduction of Aircraft Fuel Consumption by Optimizing Aerofoil by New Evolutionary Algorithms

Jan Muller

Subject: Physical Sciences, Applied Physics Keywords: Evolutionary algorithms, shape of aerofoil, optimization of shape, Bezier-PARSEC model

Online: 8 June 2021 (12:17:22 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202105.0066.v3

Quantum Foundations of Classical Reversible Computing

Michael Frank, Karpur Shukla

Subject: Physical Sciences, Applied Physics Keywords: non-equilibrium quantum thermodynamics; thermodynamics of computing; Landauer's principle; Landauer limit; reversible computing; resource theory of quantum thermodynamics; Gorini-Kossakowski-Sudarshan-Lindblad dynamics; von Neumann entropy; Rényi entropy; open quantum systems

Online: 28 May 2021 (12:13:42 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202103.0349.v2

Geometry-Induced Rigidity in Elastic Torus from Circular to Oblique Elliptic Cross-Section

Bohua Sun

Subject: Physical Sciences, Applied Physics Keywords: elliptic torus; oblique; nonlinear deformation; vibration; Gauss curvature; Maple

Online: 17 May 2021 (10:15:17 CEST)

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Preprint HYPOTHESIS | doi:10.20944/preprints202105.0234.v2

Rethinking Life and Predicting Its Origin

Diogo Gonçalves

Subject: Physical Sciences, Applied Physics Keywords: Theory of Life; Definition of Life; Evolutionary Theory; Origin of Life; Electron Bifurcation; Hydrothermal Vents; Biophysics; Biological Physics

Online: 17 May 2021 (09:46:37 CEST)

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Preprint HYPOTHESIS | doi:10.20944/preprints202105.0234.v1

Rethinking Life and Predicting Its Origin

Diogo Gonçalves

Subject: Physical Sciences, Applied Physics Keywords: Theory of Life; Evolutionary Theory; Biophysics; Biological Physics; Origin of Life; Hydrothermal Vents

Online: 11 May 2021 (10:40:20 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202105.0066.v2

Quantum Foundations of Classical Reversible Computing

Michael Frank, Karpur Shukla

Subject: Physical Sciences, Applied Physics Keywords: non-equilibrium quantum thermodynamics; thermodynamics of computing; Landauer's principle; Landauer limit; reversible computing; resource theory of quantum thermodynamics; Gorini-Kossakowski-Sudarshan-Lindblad dynamics; von Neumann entropy; Rényi entropy; open quantum systems

Online: 7 May 2021 (10:42:31 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202105.0066.v1

Quantum Foundations of Classical Reversible Computing

Michael Frank, Karpur Shukla

Subject: Physical Sciences, Applied Physics Keywords: non-equilibrium quantum thermodynamics; thermodynamics of computing; Landauer's principle; Landauer limit; reversible computing; resource theory of quantum thermodynamics; Gorini-Kossakowski-Sudarshan-Lindblad dynamics; von Neumann entropy; Rényi entropy; open quantum systems

Online: 5 May 2021 (13:50:13 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202103.0654.v3

Hybrid Classical-Quantum Fitting Attention States to Statistical Mechanics of Neocortical Interactions

Lester Ingber

Subject: Physical Sciences, Applied Physics Keywords: path integral; quantum systems; neocortical interactions

Online: 31 March 2021 (11:28:31 CEST)

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Hybrid Classical-Quantum computing has already arrived at several commercial quantum computers, offered to researchers and businesses. Here, application is made to a classical-quantum model of human neocortex, Statistical Mechanics of Neocortical Interactions (SMNI), which has had its applications published in many papers since 1981. However, this project only uses Classical (super-)computers. Since 2015, a path-integral algorithm, PATHINT, used previously to accurately describe several systems in several disciplines, has been generalized from 1 dimension to N dimensions, and from classical to quantum systems, qPATHINT. Published papers have described the use of qPATHINT to neocortical interactions and financial options. The classical space described by SMNI applies nonlinear nonequilibrium multivariate statistical mechanics to synaptic neuronal interactions, while the quantum space described by qPATHINT applies synaptic contributions from Ca2+ waves generated by astrocytes at tripartite neuron-astrocyte-neuron sites. Previous SMNI publications since 2013 have calculated the astrocyte Ca2+ wave synaptic interactions from a closed-form (analytic) expression derived by the Principal Investigator. However, more realistic random shocks to the Ca2+ waves from ions entering and leaving these wave packets should be included using qPATHINT between electroencephalographic (EEG) measurements which decohere the quantum wave packets. This current project extends calculations to multiple scales of interaction between classical events and expectations over the Ca2+ quantum processes to include these random shocks in previous codes used to fit EEG data to the SMNI model, that included the analytic forms for the quantum processes but now replaced by qPATHINT. The Principal Investigator's Adaptive Simulated Annealing (ASA) importance-sampling optimization code is used for fitting the combined classical-quantum system. Gaussian Quadratures is used for numerical calculation of momenta expectations of the astrocyte processes that contribute to SMNI synaptic interactions. This project thereby demonstrates how some hybrid classical-quantum systems may be calculated quite well using only classical (super-)computers.

Preprint ARTICLE | doi:10.20944/preprints202103.0654.v2

Hybrid Classical-Quantum Fitting Attention States to Statistical Mechanics of Neocortical Interactions

Lester Ingber

Subject: Physical Sciences, Applied Physics Keywords: path integral; quantum systems; neocortical interactions

Online: 29 March 2021 (16:22:26 CEST)

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Hybrid Classical-Quantum computing has already arrived at several commercial quantum computers, offered to researchers and businesses. Here, application is made to a classical-quantum model of human neocortex, Statistical Mechanics of Neocortical Interactions (SMNI), which has had its applications published in many papers since 1981. However, this project only uses Classical (super-)computers. Since 2015, a path-integral algorithm, PATHINT, used previously to accurately describe several systems in several disciplines, has been generalized from 1 dimension to N dimensions, and from classical to quantum systems, qPATHINT. Published papers have described the use of qPATHINT to neocortical interactions and financial options. The classical space described by SMNI applies nonlinear nonequilibrium multivariate statistical mechanics to synaptic neuronal interactions, while the quantum space described by qPATHINT applies synaptic contributions from Ca2+ waves generated by astrocytes at tripartite neuron-astrocyte-neuron sites. Previous SMNI publications since 2013 have calculated the astrocyte Ca2+ wave synaptic interactions from a closed-form (analytic) expression derived by the Principal Investigator (PI). However, more realistic random shocks to the Ca2+ waves from ions entering and leaving these wave packets should be included using qPATHINT between electroencephalographic (EEG) measurements which decohere the quantum wave packets. This current project extends calculations to multiple scales of interaction between classical events and expectations over the Ca2+ quantum processes to include these random shocks in previous codes used to fit EEG data to the SMNI model, that included the analytic forms for the quantum processes but now replaced by qPATHINT. The PI's Adaptive Simulated Annealing (ASA) importance-sampling optimization code is used for fitting the combined classical-quantum system. Gaussian Quadratures is used for numerical calculation of momenta expectations of the astrocyte processes that contribute to SMNI synaptic interactions. This project thereby demonstrates how some hybrid classical-quantum systems may be calculated quite well using only classical (super-)computers.

Preprint ARTICLE | doi:10.20944/preprints202103.0153.v1

Analytical and Semi-Analytical Solutions for the Self and Mutual Inductances of Concentric Coplanar Ordinary and Bitter Disk Coils

Slobodan Babic

Subject: Physical Sciences, Applied Physics Keywords: Ordinary disk coils; Bitter disk coils; mutual inductance, self-inductance.

Online: 4 March 2021 (10:12:28 CET)

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Preprint ARTICLE | doi:10.20944/preprints202101.0577.v1

Validation of a Fast and Accurate Magnetic Tracker Operating in the Environmental Field

Valerio Biancalana, Roberto Cecchi, Piero Chessa, Marco Mandalà, Giuseppe Bevilacqua, Yordanka Dancheva, Antonio Vigilante

Subject: Physical Sciences, Applied Physics Keywords: Tracking; Magnetic tracking; Eye tracking; Sensor Array; Eye Motion

Online: 28 January 2021 (08:10:19 CET)

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Working Paper ARTICLE

Fast, Cheap, and Scalable Magnetic Tracker with an Array of Magnetoresistors

Valerio Biancalana, Roberto Cecchi, Piero Chessa, Giuseppe Bevilacqua, Yordanka Dancheva, Antonio Vigilante

Subject: Physical Sciences, Applied Physics Keywords: Tracking; Magnetic tracker; Magnetoresistor; Magnetic Sensor; Sensor Array; Microcontroller; Eye Motion

Online: 14 December 2020 (12:59:20 CET)

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Preprint ARTICLE | doi:10.20944/preprints202012.0278.v1

HTS Accelerator Magnets and Conductor development in Europe

Lucio Rossi, Carmine Senatore

Subject: Physical Sciences, Applied Physics Keywords: High current density HTS; Roebel cables; Accelerator magnets; Collider Magnets; Superconducting HTS Magnets.

Online: 11 December 2020 (11:47:53 CET)

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Preprint ARTICLE | doi:10.20944/preprints202012.0262.v1

A Mathematical Interpretation and Validation of the Streamline's Shape Theory for Inviscid-Incompressible Flows & Viscid-Compressible Flows of the Newtonian Fluids

Yuvaraj George

Subject: Physical Sciences, Applied Physics Keywords: Fluid-Structure interactions; Topological fluid dynamics; General fluid mechanics; Mathematical fluid dynamics; Applied mathematics

Online: 10 December 2020 (13:06:39 CET)

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Preprint CASE REPORT | doi:10.20944/preprints202009.0385.v3

Forecasting with Importance-Sampling and Path-Integrals: Applications to COVID-19

Lester Ingber

Subject: Physical Sciences, Applied Physics Keywords: path integral; importance sampling; financial options; combat analysis; COVID-19

Online: 12 October 2020 (15:15:40 CEST)

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Preprint CASE REPORT | doi:10.20944/preprints202009.0385.v2

Forecasting with Importance-Sampling and Path-Integrals: Applications to COVID-19

Lester Ingber

Subject: Physical Sciences, Applied Physics Keywords: path integral; importance sampling; financial options; combat analysis; COVID-19

Online: 8 October 2020 (13:07:42 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202009.0591.v1

Quantum Calcium-Ion Affective Influences Measured by EEG

Lester Ingber

Subject: Physical Sciences, Applied Physics Keywords: quantum mechanics; path integral; importance sampling; neuroscience

Online: 25 September 2020 (03:12:14 CEST)

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Background: Since circa 1980, a model of neocortical interactions, Statistical Mechanics of Neocortical Interactions (SMNI) has been successful in calculating many experimental phenomena, including fits to electroencephalographic (EEG) data in attention tasks, using an importance-sampling code Adaptive Simulated Annealing (ASA). The SMNI model is developed in the context of classical path-integrals, which affords intuitive insights as well as direct numerical benefits, e.g., using the effective Action as a a cost/objective function for parameter fits to data. Objective: Previous authors have fit affective EEG data to neural-network models. This project seeks to use models based on physics and biology to fit this same data. Previous work showed improvements in fits to EEG for attention states; this project extends these methods to affective states. Method: Path integrals are used in both classical and quantum contexts. Classical path integrals are used to define a cost/objective function to fit data, and quantum path integrals are used to derive a closed-form analytic expression for Ca-ion waves in the presence of a magnetic vector potential which is generated by highly synchronous neuronal firings which give rise to EEG. ASA is used to fit EEG data. Results: The mathematical-physics and computer parts of the study are successful, in that cost/objective functions used to fit EEG data using these models are consistent with previous work published by other authors. However, since the SMNI model includes these quantum effects, this is another reason to continue examining these issues. The results here are consistent, not better, than previous work using neural-network models, albeit only one parameter was used here, instead of multiple filters and kernels used previously on such data. Conclusion: Although these quantum effects are highly speculative, explicit calculations have shown them to be consistent with experimental data, at least to date. The current supercomputer project extends this model to affective/emotion data. Results from several authors using neural-network approaches at individual electrode sites show some predictive capabilities; the results given here are consistent with these other results. However, since the SMNI model includes these quantum effects, this is another reason to continue examining these issues.

Preprint CASE REPORT | doi:10.20944/preprints202009.0385.v1

Forecasting with Importance-Sampling and Path-Integrals

Lester Ingber

Subject: Physical Sciences, Applied Physics Keywords: path integral; importance sampling; financial options; combat analysis

Online: 17 September 2020 (07:53:32 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202009.0370.v1

Radiation Protection Legislation and Sustainable Development of a Rural Green-Tuff Village of Ischia Island

Giuseppe La Verde, Vittoria D'Avino, Carlo Sabbarese, Fabrizio Ambrosino, Vincenzo Roca, Adelaide Raulo, Mariagabriella Pugliese

Subject: Physical Sciences, Applied Physics Keywords: building materials; rural architecture; Ischia Island; radiological characterization; radon; radiological risk assessment; sustainable buildings

Online: 17 September 2020 (04:16:06 CEST)

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Working Paper ARTICLE

Simple Ventilators for Emergency Use Based on Bag-Valve Pressing Systems: Lessons Learned and Future Steps

Enrique Castro-Camus, Jan Ornik, Cornelius Mach, Goretti Hernandez-Cardoso, Bhushan Savalia, Jochen Taiber, Armando Ruiz-Marquez, Karl Kesper, Srumika Konde, Caroline Sommer, Julian Wiener, David Geisel, Franziska Hüppe, Gunter Kräling, Peter Mross, Johnny Nguyen, Thomas Wiesmann, Björn Beutel, Martin Koch

Subject: Physical Sciences, Applied Physics Keywords: Mechanical ventilators; covid-19; simple

Online: 4 September 2020 (12:32:58 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202008.0412.v1

Dynamics and Pattern Formation of a Diffusive Predator-prey Model in the Subdiffusive Regime in Presence of Toxicity

Daniel Cassidi Bitang A Ziem, Carlos Lawrence Gninzanlong, Conrad Bertrand Tabi, Timoléon Crépin Kofane

Subject: Physical Sciences, Applied Physics Keywords: Pattern formation; subdiffusive regime; toxicity

Online: 19 August 2020 (10:54:11 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202008.0338.v1

Should A Good Organic Solar Cell Be A Good Organic LED?

Gregory Kozyreff, Blaise Godefroid

Subject: Physical Sciences, Applied Physics Keywords: organic solar cells; heterojunction; IQE; organic LED

Online: 15 August 2020 (05:21:17 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202007.0685.v1

High-quality-factor Optical Microresonators Fabricated on Lithium Niobite Thin Film with an Electro-optical Tuning Range Spanning Over One Free Spectral Range

Zhe Wang, Chaohua Wu, Zhiwei Fang, Min Wang, Jintian Lin, Rongbo Wu, Jianhao Zhang, Jianping Yu, Miao Wu, Wei Chu, Tao Lu, Gang Chen, Ya Cheng

Subject: Physical Sciences, Applied Physics Keywords: microresonators; lithium niobate; electro-optical tuning; chemo-mechanical etching

Online: 28 July 2020 (13:58:37 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202007.0559.v1

High Spatial Resolution Climate Scenarios to Analyze Madrid Building Energy Demand

Roberto San José, Juan Luis Pérez, Rosa María Gonzalez-Barras

Subject: Physical Sciences, Applied Physics Keywords: climate; downscaling; impact; building

Online: 23 July 2020 (12:30:24 CEST)

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Working Paper ARTICLE

Effective Electrodynamics Theory for the Hyperbolic Metamaterial Consisting of Metal-Dielectric Layers

Pi-Gang Luan

Subject: Physical Sciences, Applied Physics Keywords: metamaterial; hyperbolic metamaterial; Drude Model; Lorentz Model; Lagrangian; Hamiltonian

Online: 20 July 2020 (09:00:54 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202007.0378.v1

Biosensing Cytokine IL-6: A Comparative Analysis of Natural and Synthetic Receptors

Eleonora Alfinito, Matteo Beccaria, Mariangela Ciccarese

Subject: Physical Sciences, Applied Physics Keywords: IL-6 cytokine; biosensors; Proteotronics; aptamers; topological analysis

Online: 17 July 2020 (11:05:08 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202007.0308.v1

Investigation of the Maturity Changes of Cherry Tomato Using Magnetic Resonance Imaging

Seunghoon Baek, Jongguk Lim, Jun Gu Lee, Michael J. McCarthy, Seong Min Kim

Subject: Physical Sciences, Applied Physics Keywords: magnetic resonance imaging; cherry tomato; maturity change; internal structure

Online: 14 July 2020 (11:52:59 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202007.0300.v1

Derivation of Time and Spatial Decaying of Schrodinger Equation Using Maxwell Electric Equation to Describe Scattering in Some Physical Systems

Zoalnoon Ahmed Abeid Allah Saad, Lutfi Mohammed, HassabAllah Moammed, Mubarak Dirar

Subject: Physical Sciences, Applied Physics Keywords: Complex wave mek complex frequency; medium; electric field; the medium wave function; friction; relaxation time

Online: 14 July 2020 (11:22:29 CEST)

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Preprint COMMUNICATION | doi:10.20944/preprints202003.0377.v2

A New Radio-Frequency Acoustic Method for Remote Study of Liquids

Alexander V. Kramarenko, Andrey V. Kramarenko, Oksana O. Savenko

Subject: Physical Sciences, Applied Physics Keywords: contactless cardiography; polarization vector; polarimetry; aqueous electrolyte solution; relaxation time

Online: 13 July 2020 (03:05:48 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202007.0127.v1

The Monotonic Rising and Oscillating of Capillary Driven Flow in Circular Cylindrical Tubes

Bohua Sun

Subject: Physical Sciences, Applied Physics Keywords: capillary rise; dynamics; tube radius criteria; oscillation; monotonic rising

Online: 7 July 2020 (11:13:33 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202007.0070.v1

The Fast and Accurate Calculation of the Self Inductance for the Circular Coils of the Rectangular Cross Section with the Radial and the Azimuthal Current Densities

Slobodan Babic, Cevdet Akyel

Subject: Physical Sciences, Applied Physics Keywords: Self inductance; radial current; azimuthal current; thick coils; disk coils; solenoids

Online: 5 July 2020 (11:50:12 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202003.0156.v2

On Symmetrical Deformation of Toroidal Shell with Circular Cross-Section

Bohua Sun

Subject: Physical Sciences, Applied Physics Keywords: toroidal shell; deformation; Gauss curvature; Heun's function; hypergeometric function; Maple

Online: 26 May 2020 (07:45:00 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202005.0013.v1

Vertical Organic Permeable Dual-Base Transistors for Logic Circuits

Erjuan Guo, Zhongbin Wu, Ghader Darbandy, Shen Xing, Shu-Jen Wang, Alexander Tahn, Michael Göbel, Alexander Kloes, Karl Leo, Hans Kleemann

Subject: Physical Sciences, Applied Physics Keywords: organic permeable dual-base transistors; vertical channel; logic circuits; threshold voltage; TCAD simulation

Online: 2 May 2020 (13:29:45 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202003.0439.v2

Morphological Changes in H1299 Human Lung Cancer Cells Following Millimeter-Wave Irradiation

Konstantin Komoshvili, Tzippi Becker, Jacob Levitan, Asher Yahalom, Ayan Barbora, Stella Liberman-Aronov

Subject: Physical Sciences, Applied Physics Keywords: non-ionizing radiation; lung cancer; millimeter waves; cell morphology; 75-110 GHz

Online: 17 April 2020 (12:49:49 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202003.0439.v1

Morphological Changes in H1299 Human Lung Cancer Cells Following Millimeter-Wave Irradiation

Konstantin Komoshvili, Tzippi Beker, Jacob Levitan, Asher Yahalom, Ayan Barbora, Stella Liberman- Aronov

Subject: Physical Sciences, Applied Physics Keywords: non-ionizing radiation; lung cancer; millimeter waves; cell morphology; 75-110 GHz

Online: 30 March 2020 (05:03:23 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202003.0417.v1

Increasing the Energy Savings and Yield of Lactuca sativa, L. in Glass Greenhouses through Illumination Spectral Filtering

Jacqualine A. Thomas, Mikhail Vasiliev, Mohammad Nur-E-Alam, Kamal Alameh

Subject: Physical Sciences, Applied Physics Keywords: Greenhouse agriculture; Lactuca sativa; spectral optimization; energy efficiency

Online: 29 March 2020 (03:35:34 CEST)

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Preprint COMMUNICATION | doi:10.20944/preprints202003.0377.v1

A New Radio-Frequency Acoustic Method for Remote Study of Liquids

Alexander V. Kramarenko, Andrey V. Kramarenko

Subject: Physical Sciences, Applied Physics Keywords: contactless cardiography; polarization vector; polarimetry; aqueous electrolyte solution; relaxation time; spin configuration

Online: 26 March 2020 (01:40:07 CET)

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Preprint ARTICLE | doi:10.20944/preprints202003.0301.v1

Mixed Convective in an Axisymmetric Magneto Flow Owing to MoS₂-GO Hybrid Nanoliquids in H₂O Based Liquid through an Upright Cylinder with Shape Factor

Manuel Malaver, Hamed Kasmaei, Umair Khan, Aurang Zaib

Subject: Physical Sciences, Applied Physics Keywords: Nanoliquids; Nanofluids; Thermal conductivity; cylinder; shapefactor; Nanoparticles; Simulation; Thermal radiation; Thermal expansion

Online: 19 March 2020 (13:58:10 CET)

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Preprint ARTICLE | doi:10.20944/preprints202003.0156.v1

On Symmetrical Deformation of Toroidal Shell with Circular Cross-Section

Bohua Sun

Subject: Physical Sciences, Applied Physics Keywords: toroidal shell; deformation; Gauss curvature; Heun's function; hypergeometric function; Maple

Online: 10 March 2020 (03:19:02 CET)

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Preprint ARTICLE | doi:10.20944/preprints202002.0400.v1

Zheng's Scaling Laws of Jet Produced by Shaped Charge

Bohua Sun

Subject: Physical Sciences, Applied Physics Keywords: shaped charge; jet,stability; breakup diameter; breakup time; dimensional analysis

Online: 27 February 2020 (11:14:58 CET)

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Preprint ARTICLE | doi:10.20944/preprints201911.0250.v2

Application of Shannon Entropy in the Construction of a Paraconsistent Model of the Atom

João Inácio da Silva Filho

Subject: Physical Sciences, Applied Physics Keywords: quantum information; shannon entropy; quantum physics; paraconsistent logic; mathematics and computing

Online: 24 February 2020 (04:04:11 CET)

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Preprint ARTICLE | doi:10.20944/preprints202002.0244.v1

Retro-Fitting Earth-Field Compensation Coils to the Vertical Cryostat GERSEMI in FREIA

Volker Ziemann, Rolf Wedberg, Tord Peterson, Anders Wiren

Subject: Physical Sciences, Applied Physics Keywords: magnetic field compensation; vertical cryostat; FREIA

Online: 17 February 2020 (14:57:39 CET)

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Preprint ARTICLE | doi:10.20944/preprints202002.0157.v1

A Biological-based Photo Electrochemical Cell: Modelling the Impedance Spectra

Eleonora Alfinito, Francesco Milano, Matteo Beccaria, Rosella CATALDO, Livia Giotta, Massimo Trotta, Maria Rachele Guascito

Subject: Physical Sciences, Applied Physics Keywords: impedance; photo-electrochemical cell; reaction centers

Online: 12 February 2020 (12:15:48 CET)

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Preprint ARTICLE | doi:10.20944/preprints202001.0084.v1

Femtosecond Laser-micromachining of Glass Micro-chip for High Order Harmonic Generation in Gases

Anna G. Ciriolo, Rebeca Martinez Vazquez, Alice Roversi, Aldo Frezotti, Caterina Vozzi, Roberto Osellame, Salvatore Stagira

Subject: Physical Sciences, Applied Physics Keywords: Femtosecond laser micromachining; High order harmonic generation; de Laval gas micro nozzle; Attosecond science.

Online: 9 January 2020 (12:01:44 CET)

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Preprint ARTICLE | doi:10.20944/preprints201911.0250.v1

Application of the Shannon Entropy in the Construction of a Paraconsistent Model of the Atom

João Inácio da Silva Filho

Subject: Physical Sciences, Applied Physics Keywords: quantum information; shannon entropy; quantum physics; paraconsistent logic; mathematics and computing

Online: 21 November 2019 (10:41:58 CET)

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Preprint ARTICLE | doi:10.20944/preprints201911.0166.v1

Study of Local Inertial Focusing Conditions for Spherical Particles in Asymmetric Serpentines

Eric Pedrol, Jaume Massons, Francesc Díaz, Magdalena Aguiló

Subject: Physical Sciences, Applied Physics Keywords: inertial focusing; serpentine; dean; inertial force; shear gradient-induced; wall effect; vortex

Online: 15 November 2019 (03:37:41 CET)

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Preprint ARTICLE | doi:10.20944/preprints201910.0210.v1

Scanning Magnetic Microscope Using A Hall-Effect Sensor for Images of Remanent Magnetization Fields

Jefferson F. D. F. Araujo, Angela A. P. Correa, Elder Yokoyama, Andre L. A. dos Reis, Vanderlei C. Oliveira Jr., Leonardo A. F. Mendoza, Marcos A. C. Pacheco, Cleanio Luz-Lima, Amanda F. Santos, Fredy G. Osorio G., Giancarlo E. Brito, Wagner W. R. Araujo, Tahir Tahir, Antonio C. Bruno, Tommaso Del Rosso

Subject: Physical Sciences, Applied Physics Keywords: scanning magnetic microscopy; Hall sensor; magnetic measurements; geological sample

Online: 18 October 2019 (08:53:15 CEST)

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Scanning magnetic microscopy is a new tool that has recently been used to map magnetic fields with good spatial resolution and field sensitivity. This technology has great advantages over other instruments; for example, its operation does not require cryogenic technology, which reduces its operational cost and complexity. Here, we describe the construction of a customizing scanning magnetic microscope based on commercial Hall-effect sensors at room temperature that achieves a spatial resolution of 200 µm. Two scanning stages on the x- and y-axes of precision, consisting of two coupled actuators, control the position of the sample, and this microscope can operate inside or outside a magnetic shield. We obtained magnetic field sensitivities better than 521 nT_rms/√Hz between 1 and 10 Hz, which correspond to a magnetic momentum sensitivity of 9.20 × 10^–10 Am². In order to demonstrate the capability of the microscopy, polished thin sections of geological samples, samples containing microparticles and magnetic nanoparticles were measured. For the geological samples, a theoretical model was adapted from the magnetic maps obtained by the equipment. Vector field maps are valuable tools for the magnetic interpretation of samples with a high spatial variability of magnetization. These maps can provide comprehensive information regarding the spatial distribution of magnetic carriers. In addition, this model may be useful for characterizing isolated areas over samples or investigating the spatial magnetization distribution of bulk samples at the micro and millimeter scales. As an auxiliary technique, a magnetic sweep map was created using Raman spectroscopy; this map allowed the verification of different minerals in the samples. This equipment can be useful for many applications that require samples that need to be mapped without a magnetic field at room temperature, including rock magnetism, the nondestructive testing of steel materials and the testing of biological samples. The equipment can not only be used in cutting-edge research but also serve as a teaching tool to introduce undergraduate, master's and Ph.D. students to the measurement methods and processing techniques used in scanning magnetic microscopy.

Preprint ARTICLE | doi:10.20944/preprints201910.0128.v1

In-Plane Switching Deformed Helix Ferroelectric Liquid Crystal Display Cells

E. P. Pozhidaev, T. P. Tkachenko, A. V. Kuznetsov, I. N. Kompanets

Subject: Physical Sciences, Applied Physics Keywords: deformed helix ferroelectric liquid crystal effect; in-plane switching

Online: 11 October 2019 (05:42:43 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201910.0100.v1

One Step Mechanosynthesis of Graphene Oxide Directly from Graphite

Victor Ibarra, Demetrio Mendoza, Alma Sanchez, Rosa Vazquez, Karina Aleman, Marius Ramirez, Victor Castano

Subject: Physical Sciences, Applied Physics Keywords: graphene; graphene oxide; mechanochemistry; solvent-free; one-step

Online: 9 October 2019 (10:39:18 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201910.0061.v1

Towards a framework for Noctilucent Cloud Analysis

Puneet Sharma, Peter Dalin, Ingrid Mann

Subject: Physical Sciences, Applied Physics Keywords: noctilucent clouds; linear discriminant analysis; convolutional neural networks

Online: 7 October 2019 (11:07:56 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201909.0205.v1

FluoroTome 1: An Apparatus for Tomographic Imaging of Radio-Fluorogenic (RFG) Gels

John M. Warman, Matthijs P. de Haas, Leonard H. Luthjens, Tiantian Yao, Julia Navarro-Campos, Sölen Yuksel, Jan Aarts, Simon Thiele, Jacco Houter, Wilco in het Zandt

Subject: Physical Sciences, Applied Physics Keywords: fluorescent gels; radio-fluorogenic (RFG) gel; tomographic fluorescence imaging; polymer-gel radiation dosimetry; 3D radiation dosimetry

Online: 18 September 2019 (12:54:24 CEST)

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