Search | Preprints.org

Preprint ARTICLE | doi:10.20944/preprints202201.0061.v1

EmmDocClassifier: Efficient Multimodal Document Image Classifier for Scarce Data

Shrinidhi Kanchi, Alain Pagani, Hamam Mokayed, Marcus Liwicki, Didier Stricker, Muhammad Zeshan Afzal

Subject: Computer Science And Mathematics, Computer Vision And Graphics Keywords: BERT, Document Image Classification, EfficientNet, fine-tuned BERT, Hierarchical Attention Networks, Multimodal, RVL-CDIP, Two-stream, Tobacco-3482

Online: 6 January 2022 (10:08:38 CET)

Show abstract| Download PDF| Share

Preprint REVIEW | doi:10.20944/preprints202005.0234.v1

Epidemiological Challenges in Pandemic Coronavirus Disease (COVID-19): Role of Artificial Intelligence

Abhijit Dasgupta, Abhisek Bakshi, Srijani Mukherjee, Kuntal Das, Soumyajeet Talukdar, Pratyayee Chatterjee, Sagnik Mondal, Puspita Das, Subhrojit Ghosh, Archisman Som, Pritha Roy, Rima Kundu, Akash Sarkar, Arnab Biswas, Karnelia Paul, Sujit Basak, Krishnendu Manna, Chinmay Saha, Satinath Mukhopadhyay, Nitai P. Bhattacharyya, Rajat K. De

Subject: Computer Science And Mathematics, Artificial Intelligence And Machine Learning Keywords: SIRD; Twitter; GHSI; Pre-symptomatic; EHR; Contact tracing; On-line survey; qRT-PCR; X-ray; CT/HRCT; CNN; Autoencoder; Drug affinity; CPI; and Inflation.

Online: 14 May 2020 (11:25:57 CEST)

Show abstract| Download PDF| Supplementary Files| Share

Preprint ARTICLE | doi:10.20944/preprints202102.0395.v2

Asymptotic Freedom, Quark Confinement, Proton Spin Crisis, Neutron Structure, Dark Matters, and Relative force strengths

Jae-Kwang Hwang

Subject: Physical Sciences, Particle And Field Physics Keywords: Quark confinement; Asymptotic freedom; Relative force strength; Dark matters; Proton crisis; Deep inelastic scattering; Neutron structure; Two lepton system

Online: 13 October 2021 (10:31:18 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints201607.0017.v1

Elastic Wave Motions and an Electromagnetic Field for a Photothermal Theory with Two Temperature under Hydrostatic Initial Stress

Khaled Lotfy, Wafaa Hassan

Subject: Physical Sciences, Particle And Field Physics Keywords: photothermal theory; carrier density; magnetic field; the harmonic wave; two temperature

Online: 9 July 2016 (11:00:24 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.3390/sci2020046

Portable XRF Quick-Scan Mapping for Potential Toxic Elements Pollutants in Sustainable Urban Drainage Systems: A Methodological Approach

Guri Venvik, Floris Boogaard

Subject: Environmental And Earth Sciences, Environmental Science Keywords: portable X-ray fluorescence spectrometer (pXRF); Potential Toxic Elements (PTE); lead (Pb), zinc (Zn); copper (Cu); topsoil; sustainable urban drainage systems; SuDS; LID; BMPs; WSUD; GI; SCMs

Online: 13 June 2020 (00:00:00 CEST)

Show abstract| Share

Preprint ARTICLE | doi:10.20944/preprints201610.0126.v1

Comments about Rietveld Analysis and Tolerance Factor: Y Doped BaTiO₃

I. A. Lira-Hernández, F. R. Barrientos-Hernández, M. Pérez-Labra, A. M. García-Mercado, J. A. Romero-Serrano

Subject: Chemistry And Materials Science, Materials Science And Technology Keywords: A. Ceramics; A. Oxides; C. X-ray diffraction; D. Crystal structure; D. Microstructure

Online: 28 October 2016 (08:09:48 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints201608.0137.v1

Contamination Characteristics and Assessment of Manganese, Zinc, Chrome, Lead, Copper and Nickel in Bus Station Dusts of Xifeng, Northwest China

Yongfu Wu, Xinwei Lu, Sukai Zhuang, Xiufeng Han, Yan Zhou

Subject: Environmental And Earth Sciences, Environmental Science Keywords: heavy metal; contamination assessment; X-ray fluorescence; bus station dusts

Online: 13 August 2016 (09:41:18 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints201608.0234.v1

Simulation Analysis of Capacitance Method in Two-Phase Flow Concentration Measurement by Coupled Fields

Xiaoxin Wang, Hongli Hu, Lin Li, Bo Wang

Subject: Physical Sciences, Particle And Field Physics Keywords: 3-D fluid-electrostatic coupling field; electrical sensor performance; concentration measurement; gas/solid two-phase flow

Online: 31 August 2016 (09:03:30 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints201609.0001.v1

ESWT Enhances Expression of Pdia-3 which is a Key Factor of 1α,25-Dihydroxyvitamin D3 Rapid Membrane Signaling Pathway in Treatment of Early Osteoarthritis Knee

Shan-Ling Hsu, Jai-Hong Cheng, Ching-Jen Wang, Jih-Yang Ko, Chih-Hsiang Hsu

Subject: Medicine And Pharmacology, Orthopedics And Sports Medicine Keywords: protein-disulfide isomerase-associated 3; osteoarthritis; extracorporeal shockwave therapy; 1α,25-Dihydroxyvitamin D3 signaling pathway; two dimensional electrophoresis

Online: 1 September 2016 (10:47:39 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints201609.0106.v2

New Scientific Contribution on the 2-D Subdomain Technique in Cartesian Coordinates: Taking into Account of Iron Parts

Frédéric Dubas, Kamel Boughrara

Subject: Computer Science And Mathematics, Applied Mathematics Keywords: air- or iron-cored coil; Cartesian coordinates; Fourier analysis; two-dimensional; saturation effect; subdomain technique

Online: 16 January 2017 (04:38:11 CET)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints201704.0010.v1

Impact of the Fused Deposition (FDM) Printing Process on Polylactic Acid (PLA) Chemistry and Structure

Michael Cuiffo, Jeffrey Snyder, Alicia Elliott, Nicholas Romero, Sandhiya Kannan, Gary Halada

Subject: Chemistry And Materials Science, Polymers And Plastics Keywords: PLA; fused deposition modeling (FDM); surface characterization; vibrational spectroscopy; laser confocal microscopy; X-ray photoelectron spectroscopy

Online: 3 April 2017 (17:34:40 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202011.0074.v4

Synthesis, Structural Characterization, and Biological Activities of Organically Templated Cobalt Phosphite (H2DAB)[Co(H2PO3)4]·2H2O

Najlaa Hamdi, Souad Chaouch, Ivan da Silva, Mohamed Ezahri, Mohammed Lachkar, Rama Alhasan, Ahmad Yaman Abdin, Claus Jacob, Brahim El Bali

Subject: Biology And Life Sciences, Immunology And Microbiology Keywords: Hybrid phosphite; X-Ray crystal structure; FTIR; Thermal behavior; Biological activities; Antimi-crobial; micro-organisms

Online: 22 November 2021 (08:43:49 CET)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202212.0450.v1

Klein-Gordon, Dirac and Schrodinger Equations, Matter and Wave Function Collapses, Photon Momenta and the Gamma Ray Burst based on the 4-D Euclidean Space

Jae-Kwang Hwang

Subject: Physical Sciences, Particle And Field Physics Keywords: P4 = TcP symmetry; Matter collapse; Wave function collapse; Klein paradox; Continuity equations; Negative energy solutions; Gamma ray burst; Photon momenta

Online: 23 December 2022 (07:57:12 CET)

Show abstract| Download PDF| Share

The negative energy solutions of the Klein-Gordon and Dirac equations have been used to define the antiparticle with the positive energy from the Feynman - Stueckelberg interpretation in the standard model based on the 4-D Minkowski space with the relative time. The negative energy solutions of the Klein-Gordon and Dirac equations are used to define the antiparticles with the negative energy in the present 3-D quantized space model. Note that all the present results are based on the 4-D Euclidean space with the absolute time (t) and relative time (t_l). Then the particle with the positive energy and antiparticle with the negative energy have the 4-D P₄ = TCP = T_cP symmetry. The continuity equations are derived from the Klein-Gordon, Dirac and Schrodinger equations. The Klein-Gordon and Schrodinger equations with the potential barriers are solved. The Klein paradox is explained by using the pair production of the electron with the positive energy and positron with the negative energy under the P₄ = _TcP symmetry, The effective velocity ( c_eff=√2 " c " ) and effective energy ("Etl =" √2 E ) along the relative time axis (ctl) give the relative time momentum of "p_tl"=E_tl/c_eff =(√2 E)/(√2 c)=E/c=p_t=p_x. This indicates that the photons with the energy of E have the constant photon velocity of c and the constant photon momentum of "ptl"=E_tl/c_eff =(√2 E)/(√2 c)=E/c=p_t=p_x. For the negative energy particles, the space momentum directions are opposite to the particle velocity directions because the energy is negative. And the matter collapse to the photons at the very high particle velocity is discussed from the length expansion. It is, for the first time, proposed that the gamma ray burst is originated from the matter collapse to the photons near the black hole. Also, the wave function collapse is explained from the length expansion. The wave function collapse takes place when the measurement makes the particle velocity to be zero. It is concluded that the negative energy solutions of the Klein-Gordon and Dirac equations support the existence of the partner antimatter universe with the negative energy and negative time direction. Our matter universe has the positive energy and the positive time direction.

Preprint ARTICLE | doi:10.20944/preprints201612.0110.v1

The Synthesis and New Crystal Structures of Three Arylpiperazine Compounds

Jinhui Zhou, Maocai Yan, Maojian Shi, Jun Xu, Guoqiang Shangguan

Subject: Chemistry And Materials Science, Applied Chemistry Keywords: arylpiperazine compound; X-ray crystal structure; characterization; triclinic

Online: 21 December 2016 (11:01:58 CET)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202007.0656.v1

One Shot Cluster Based Approach for the Detection of COVID-19 from Chest X-Ray Images

V.N. Manjunath Aradhya, Mufti Mahmud, Basant Agarwal, D.S. Guru, M. Shamim Kaiser

Subject: Medicine And Pharmacology, Epidemiology And Infectious Diseases Keywords: COVID-19 infection; Chest X-ray image; generalized regression neural network; probabilistic neural network and detection accuracy

Online: 27 July 2020 (00:52:49 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints201809.0383.v1

Achieving a Good Crystal System for Crystallographic X-ray Fragment Screening

Patrick M. Collins, Alice Douangamath, Romain Talon, Alexandre Dias, José Brandão-Neto, Tobias Krojer, Frank von Delft

Subject: Biology And Life Sciences, Biochemistry And Molecular Biology Keywords: fragment screening; XChem; protein crystallisation; X-ray crystallography; diamond light source; I04-1; structural genomics consortium

Online: 19 September 2018 (11:37:41 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints201703.0016.v1

A 14-bit Hybrid Incremental Sigma-Delta/Cyclic ADC for X-ray Linear Array Sensor

Yuze Niu, Yacong Zhang, Zhuo Zhang, Miaomiao Fan, Wengao Lu, Zhongjian Chen

Subject: Engineering, Electrical And Electronic Engineering Keywords: hybrid ADC; sigma-delta ADC; cyclic ADC; pseudo-differential OTA; X-ray sensor

Online: 2 March 2017 (08:37:48 CET)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints201710.0167.v1

Does Marine Surface Tension Have Global Biogeography? Addition for the OCEANFILMS Package

Scott Elliott, Susannah Burrows, Philip Cameron-Smith, Forrest Hoffman, Elizabeth Hunke, Nicole Jeffery, Yina Liu, Mathew Maltrud, Oluwaseun Ogunro, Luke Van Roekel, Shanlin Wang, Michael Brunke, Clara Deal, Meibing Jin, Robert Letscher, Nicholas Meskhidze, Lynn Russell, Isla Simpson, Dale Stokes, Oliver Wingenter

Subject: Environmental And Earth Sciences, Environmental Science Keywords: Gibbs phase plane; surface tension and pressure; gas, momentum and heat fluxes; biogeochemical mapping; organic macromolecules; surfactants; elasticity; proteins; lipids; compression; two dimensional equation of state

Online: 27 October 2017 (04:37:29 CEST)

Show abstract| Download PDF| Share

We apply principles of Gibbs phase plane chemistry to and across the entire ocean-atmospheric interface. Surface tension increments support a two dimensional, tangential pressure well known to determine rates of bulk gas, bubble, salt, spray and momentum transfer plus both sensible and latent heat fluxes. Hence it is worth asking whether tension mapping follows from current understanding of two dimensional composition. A history is provided dating back centuries and demonstrating that detrital organic macromolecules are central; subtle surfactant functional variation creates a microforcing field which dissipates turbulent energy at the sub-meter scale. Since we have just distributed major biopolymeric classes emitted as primary organic aerosol, further climate links can be established by considering full planar thermochemistry. Organic microlayer behaviors are reviewed with attention to confined, analog phase transitions among two dimensional “solid, liquid, (and) gaseous” states serving as elasticity indicators. We also discuss surfactant properties of general marine dissolved organic carbon, demonstrating that only proteins and lipids are capable of occupying significant local micro-area. The literature often suggests albumin and stearic acid as best proxies, and so we distribute their concentrations through multilevel global ecodynamic simulations. Consensus distributions are obtained in order to control adsorptive equilibria. Working from conservation of planar free energy, a parametric equation of state is devised relating excess coverage to the surface pressure-modulus. Constant settings for the proxy pair are drawn from laboratory study, and they successfully reproduce frequencies for surfactant solid-to-gas occurrence in ambient compression experiments. Functionally resolved organic measurements are rare and so we group them into super-ecological province tables showing that our bulk concentration estimates are reasonable. Outputs are then fed into a coverage-tension-elasticity code. Resulting contours traverse the critical range for piston velocity, bubble-spray and damping effects on either a regional or seasonal basis. There is also a possibility for widespread microlayer crystallization in polar seas. The concepts are a direct extension of our organic aerosol work, and the two approaches could be inserted into Earth System Models in tandem. Uncertainties in the logic are enumerated and include kinetic and thermochemical factors at multiple scales. But the problems are reducible through molecular modeling coupled to renewed laboratory and field study. Connections to marine colloids-gels, microlayer iron chelation, and linings of the ice channel network are discussed additionally.

Preprint ARTICLE | doi:10.20944/preprints201702.0107.v1

Maximum Storm Tide Response to the Intensity of Typhoons and Bathymetric Changes along the East Coast of Taiwan

Wen-Cheng Liu, Wei-Bo Chen, Lee-Yaw Lin

Subject: Engineering, Control And Systems Engineering Keywords: maximum storm tide; two-dimensional tide-surge modeling system; east coast of Taiwan; intensity of typhoon; bathymetric rise

Online: 28 February 2017 (13:00:56 CET)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints201703.0042.v1

A Wide-FoV Athermalized Infrared Imaging System with a Two-Piece Lens

Bin Feng, Zelin Shi, Yaohong Zhao, Haizheng Liu, Li Liu

Subject: Physical Sciences, Optics And Photonics Keywords: infrared imaging; wide field of view; athermalization; two-piece lens

Online: 8 March 2017 (04:40:47 CET)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints201704.0015.v1

Electromagnetic Performances Evaluation of an Outer-Rotor Flux-Switching Permanent Magnet Motor Based on Electrical-Thermal Two-Way Coupling Method

Zhengming Shu, Xiaoyong Zhu, Li Quan, Yi Du, Chang Liu

Subject: Physical Sciences, Particle And Field Physics Keywords: electrical-thermal two-way coupling; flux-switching permanent magnet motor; thermal analysis; permanent magnet material characteristics

Online: 4 April 2017 (08:38:40 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints201706.0036.v1

Two-Factor Authentication and Its Adaptation to Online Education Systems

Elif Karakaş, İlhan Öztozlu, Volkan Erol

Subject: Computer Science And Mathematics, Information Systems Keywords: two-factor authentication; online training; biological and behavioral features; mimic control method with sound intensity

Online: 6 June 2017 (09:04:47 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints201703.0126.v1

Investigation on Softening Mechanism of 5754 Aluminum Alloy during Multistage Hot Deformation

Chang-Qing Huang, Jie Deng, Si-Xu Wang, Lei-lei Liu

Subject: Chemistry And Materials Science, Metals, Alloys And Metallurgy Keywords: 5754 Aluminum alloy; Two-pass hot compression; Dynamic softening; Metadynamic recrystallization

Online: 16 March 2017 (18:28:52 CET)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints201903.0244.v1

Studying a Light Sensor with Light: Multiphoton Imaging in the Retina

Thomas Euler, Katrin Franke, Tom Baden

Subject: Biology And Life Sciences, Neuroscience And Neurology Keywords: vertebrate retina, mouse, zebrafish, two-photon microscopy, biosensor, activity probes, visual stimulus-evoked activity, laser-evoked retinal activity

Online: 26 March 2019 (14:01:49 CET)

Show abstract| Download PDF| Share

Preprint SHORT NOTE | doi:10.20944/preprints201703.0158.v1

Triphenylphosphine-(N,N-dimethyldithiocarbamato)-gold(I) Methanol Solvate

Nicolas Bélanger-Desmarais, Christian Reber

Subject: Chemistry And Materials Science, Inorganic And Nuclear Chemistry Keywords: au(I) dithiocarbamate and phosphine complex; Raman spectroscopy; Single crystal X-ray diffraction; DFT calculations

Online: 20 March 2017 (10:00:42 CET)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202205.0187.v1

Multidisciplinary Study of the Origin of the Painting From the Early 20TH Century Leads to Picasso

Marica Bakovic, Slobodanka Karapandza, Sajed Mcheik, Ana Pejovic Milic

Subject: Arts And Humanities, Art Keywords: historic pigments; colorants; nitrocellulose; X-ray radiography; X-ray fluorescence spectroscopy; infrared Fourier transform spectroscopy; Raman spectroscopy

Online: 13 May 2022 (09:44:35 CEST)

Show abstract| Download PDF| Supplementary Files| Share

Preprint ARTICLE | doi:10.20944/preprints201902.0082.v1

Hexadecenoic Fatty Acid Positional Isomers and de Novo PUFA Synthesis in Colon Cancer Cells

Roberta Scanferlato, Massimo Bortolotti, Anna Sansone, Chryssostomos Chatgilialoglu, Letizia Polito, Marco De Spirito, Giuseppe Maulucci, Andrea Bolognesi, Carla Ferreri

Subject: Biology And Life Sciences, Biochemistry And Molecular Biology Keywords: positional isomerism; PUFA biosynthesis; membrane remodelling; membrane lipidomics; lipidomic analysis; fluidity; functional two photon microscopy

Online: 8 February 2019 (09:43:06 CET)

Show abstract| Download PDF| Supplementary Files| Share

Preprint ARTICLE | doi:10.20944/preprints201811.0530.v2

Digital Image Segmentation in Matlab: A Brief Study on Otsu’s Image Thresholding

Md. Abu Bakr Siddique, Rezoana Bente Arif, Mohammad Mahmudur Rahman Khan

Subject: Computer Science And Mathematics, Computer Vision And Graphics Keywords: Image segmentation, Otsu’s thresholding, Two level thresholding, Three level thresholding, Error minimization, Bayes decision, Probability density function (PDF).

Online: 5 February 2019 (08:12:08 CET)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints201611.0083.v2

A Two-Phase Model of Air Shock Wave Induced by Rock-Fall in Closed Goaf

Fengyu Ren, Yang Liu, Jianli Cao, Rongxing He, Yuan Xu, Xi You, Yan-jun Zhou

Subject: Engineering, Civil Engineering Keywords: air shock wave; rock-fall; two-phase model; computational fluid dynamics (CFD)

Online: 23 January 2017 (09:15:34 CET)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints201901.0244.v1

Coatings Thickness Determination Using X-ray Fluorescence Spectroscopy: Monte Carlo Simulations as an Alternative to the Use of Standards

Walter Giurlani, Enrico Berretti, Massimo Innocenti, Alessandro Lavacchi

Subject: Chemistry And Materials Science, Surfaces, Coatings And Films Keywords: XRF; X-ray fluorescence; thickness determination; thin film; simulation; XMI-MSIM; electrodeposition; Monte Carlo; galvanic industry; electroplating

Online: 24 January 2019 (08:09:27 CET)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints201705.0043.v1

Bayesian Hierarchical Scale Mixtures of Log-Normal Models for Inference in Reliability with Stochastic Constraint

Hea-Jung Kim

Subject: Computer Science And Mathematics, Information Systems Keywords: Bayesian reliability analysis; Bayesian hierarchical model; MCMC method; scale mixtures of log-normal failure time model; stochastic constraint; two-stage MaxEnt prior.

Online: 4 May 2017 (16:26:10 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202109.0083.v1

Is the Higgs Field a Positive and Negative Mass Planckion Condensate, and Does the LHC Produce Extreme Dark Energy?

Christopher Pilot

Subject: Physical Sciences, Particle And Field Physics Keywords: Winterberg Model; Quantum Vacuum; Higgs Condensate/Composite Model; Two-Component Superfluid/Supersolid Model for the Vacuum; Positive/Negative Planckion Mass, Q-Theory; Non- Linear Heisenberg Spinor Theory; LHC Energies, Dark Energy; Lattice Substructure for Space

Online: 6 September 2021 (10:38:45 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints201904.0129.v1

Factors Affecting Electroplated Semiconductor Material Properties: The Case Study of Deposition Temperature on Cadmium Telluride

Ayotunde A. Ojo, I.M. Dharmadasa

Subject: Chemistry And Materials Science, Surfaces, Coatings And Films Keywords: Electrodeposition; CdTe film; Two-electrode configuration; thin films, electroplating temperature

Online: 10 April 2019 (12:32:29 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints201810.0535.v1

Metal Body Armour: Biomimetic Engineering of Lattice Structures ^†

Anton du Plessis, C. Broeckhoven

Subject: Engineering, Industrial And Manufacturing Engineering Keywords: biomimicry; biomimetic engineering; energy absorption; lattice structure; additive manufacturing; powder bed fusion; X-ray tomography; microCT; non-destructive testing; 3D image analysis

Online: 23 October 2018 (10:10:15 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints201705.0192.v1

An Investigation of the Composition of the Flow in and out of a Two-stroke Diesel engine and Air Consumption Ratio

Mirko Grljušić, Ivan Tolj, Gojmir Radica

Subject: Engineering, Marine Engineering Keywords: two-stroke engine; uniflow scavenging; exhaust gas composition; two-stroke gas flow performance parameters; air-fuel ratio; air consumption factor/ratio

Online: 26 May 2017 (10:56:56 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints201711.0158.v1

Solar Ray Tracing Analysis to Determine Energy Availability in a CPC Designed for Use as a Residential Water Heater

Miguel Terrón-Hernández, Manuel I. Peña-Cruz, J. G. Carrillo, Ulises Diego-Ayala, Vicente Flores

Subject: Engineering, Energy And Fuel Technology Keywords: ray tracing analysis; compound parabolic concentrator; solar water heating; photonics; optics

Online: 24 November 2017 (05:28:38 CET)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints201901.0230.v1

Control Upstream Austenite Grain Coarsening during Thin Slab Casting Direct Rolling (TSCDR) Process

Tihe Zhou, Ronald J. O'Malley, Hatem S. Zurob, Mani Subramanian, Sang-Hyun Cho, Peng Zhang

Subject: Chemistry And Materials Science, Metals, Alloys And Metallurgy Keywords: thin slab casting direct rolling, austenite grain coarsening, grain growth control, liquid core reduction, secondary cooling, two phase pinning

Online: 23 January 2019 (08:44:19 CET)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints201707.0088.v1

Secure Communication for Two-way Relay Networks with Imperfect CSI

Cong Sun, Ke Liu, Dahu Zheng, Wenbao Ai

Subject: Computer Science And Mathematics, Mathematics Keywords: physical layer security; semi-infinite programming; amplify-and-forward two-way relay; imperfect CSI; robust optimization

Online: 31 July 2017 (08:59:04 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints201801.0260.v1

Synthesis, X-ray Crystal Structures, Computational Studies and Catechol Oxidase Activity of New Acylhydrazone Derivatives

Khalid Karrouchi, Smaail Radi, Yousfi El Bekkaye, Nada Kheira Sebbar, Jamal Taoufi Taoufik, Younes Ouzidan, Hazem A. Ghabbour, Yahia Mabkhot, Salim Al-Showiman, Seham Alterary, M’hammed Ansar

Subject: Chemistry And Materials Science, Organic Chemistry Keywords: Acylhydrazone; Pyrazole; X-ray crystallography; DFT/B3LYP; Catecholase activity

Online: 28 January 2018 (12:44:49 CET)

Show abstract| Download PDF| Supplementary Files| Share

Preprint ARTICLE | doi:10.20944/preprints201912.0418.v1

Mapping Vegetation at Species Level with High-Resolution Multispectral and Lidar Data over Large Spatial Area: A Case Study with Kudzu

Wanwan Liang, Mongi Abidi, Luis Carrasco, Jack McNelis, Liem Tran, Yingkui Li, Jerome Grant

Subject: Environmental And Earth Sciences, Environmental Science Keywords: detailed vegetation mapping; kudzu mapping; coarse label; two-step classification; object-based image analysis; lidar point clouds; sampling specificity

Online: 31 December 2019 (16:58:25 CET)

Show abstract| Download PDF| Supplementary Files| Share

Mapping vegetation species is critical to facilitate related quantitative assessment, and for invasive plants mapping their distribution is important to enhance monitoring and controlling activities. Integrating high resolution multispectral remote sensing (RS) image and lidar (light detection and ranging) point clouds can provide robust features for vegetation mapping. However, using multiple source of high-resolution RS data for vegetation mapping at large spatial scale can be both computationally and sampling intensive. Here we designed a two-step classification workflow to decrease computational cost and sampling effort, and to increase classification accuracy by integrating multispectral and lidar data to derive spectral, textural, and structural features for mapping target vegetation species. We used this workflow to classify kudzu, an aggressive invasive vine, in the entire Knox County (1,362 km2) of Tennessee, the United States. Object-based image analysis was conducted in the workflow. The first-step classification used 320 kudzu samples and extensive coarsely labeled samples (based on national land cover) to generate an overprediction map of kudzu using random forest (RF). For the second step, 350 samples were randomly extracted from the overpredicted kudzu and labeled manually for the final prediction using RF and support vector machine (SVM). Computationally intensive features were only used for the second-step classification. SVM had constantly better accuracy than RF, and the Producer’s Accuracy, User’s Accuracy, and Kappa for the SVM model on kudzu was 0.94, 0.96, and 0.90, respectively. SVM predicted 1010 kudzu patches covering 1.29 km2 in Knox County. We found the sample size of kudzu used for algorithm training impacted the accuracy and number of kudzu predicted. The proposed workflow could also improve sampling efficiency and specificity. Our workflow had much higher accuracy than the traditional method conducted in this research, and could be easily implemented to map kudzu in other regions or other vegetation species.

Preprint ARTICLE | doi:10.20944/preprints201904.0299.v1

Green Synthesis, Structural, In Vitro and Vivo Bioactivity Properties of ZnO Nanoparticles for Biomedical Applications

Essam H. Ibrahim, Obaid Albulym, Omer Kaygili, Mona Kilany, Mohd Shkir, Mai S.A. Hussien, Niyazi Bulut, I.S. Yahia

Subject: Chemistry And Materials Science, Biomaterials Keywords: X-ray diffraction; bioactivities; cytotoxicity test; Anti-cancer activities

Online: 26 April 2019 (11:00:21 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints201902.0110.v1

Cooperated Routing Problem for Ground Vehicle and Unmanned Aerial Vehicle: The Application on Intelligence, Surveillance and Reconnaissance Missions

Yao Liu, Zhihao Luo, Zhong Liu, Jianmai Shi, Guangquan Cheng

Subject: Engineering, Control And Systems Engineering Keywords: two-echelon routing; vehicle routing; vehicle-mounted UAVs; ISR mission

Online: 13 February 2019 (10:33:55 CET)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints201710.0110.v1

Multi Component Reactions under Increased Pressure: On the Mechanism of Formation of Pyridazino[5,4,3-de][1,6]naphthyridine Derivatives from Reaction of Malononitrile, Aldehyde and 2-Oxoglyoxalarylhydrazones in Q-Tubes

Majdah A. AL-Johani, Khadijah M. Al-Zaydi, Sameera M. Mousally, Norah F. Alqahtani, Mohamed H. Elnagdi

Subject: Chemistry And Materials Science, Organic Chemistry Keywords: X-ray; arylhydrazones; 2-amino-1,1,3-propenetricarbonitrile; pyridazines; rate enhance under pressure

Online: 17 October 2017 (04:13:47 CEST)

Show abstract| Download PDF| Supplementary Files| Share

Preprint ARTICLE | doi:10.20944/preprints201907.0028.v2

Comparative Study of the Reactivity of the Tungsten Oxides WO₂and WO₃with Beryllium at Temperatures up to 1273 K

Martin Köppen

Subject: Chemistry And Materials Science, Physical Chemistry Keywords: X-ray photoelectron spectroscopy; physical vapor deposition; X-ray diffraction; tungsten oxide; tungsten dioxide; tungsten trioxide; beryllium; tungstate; tungsten bronze

Online: 10 September 2019 (08:09:51 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints201708.0052.v1

New Scientific Contribution on the 2-D Subdomain Technique in Polar Coordinates: Taking into Account of Iron Parts

Frédéric Dubas, Kamel Boughrara

Subject: Computer Science And Mathematics, Applied Mathematics Keywords: air- or iron-cored coil; polar coordinates; fourier analysis; two-dimensional; subdomain technique

Online: 14 August 2017 (06:07:40 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints201805.0171.v1

Fracture Reconstruction and Analysis of Low Permeability Carbonates using x-ray Tomography for Comparison with Outcrop Data

Stephanie G. Zihms, Helen Lewis, Tiago Siqueira de Miranda, Stephen A. Hall, James M. Somerville

Subject: Environmental And Earth Sciences, Geography Keywords: geomechanics; fractures; multi-scale; x-ray tomography; carbonates

Online: 10 May 2018 (16:24:06 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints201902.0183.v1

Two-Echelon Routing Problem for Parcel Delivery by Cooperated Truck and Drone

Yao Liu, Jianmai Shi, Guohua Wu, Zhong Liu, Witold Pedrycz

Subject: Engineering, Control And Systems Engineering Keywords: two-echelon routing; vehicle routing; truck and drone; heuristic; simulated annealing algorithm

Online: 19 February 2019 (15:17:33 CET)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints201710.0061.v1

Quantitative Imaging of the Stress/Strain Fields and Generation of Macroscopic Cracks from Indents in Silicon

Brian K. Tanner, David Allen, Jochen Wittge, Andreas N. Danilewsky, Jorge Garagorri, Eider Gorostegui-Colinas, Reyes M. Elizalde, Patrick J. McNally

Subject: Chemistry And Materials Science, Surfaces, Coatings And Films Keywords: X-ray diffraction imaging; Raman spectroscopy; indentation geometry; plastic deformation; crack generation; plastic deformation strain imaging

Online: 10 October 2017 (11:46:27 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints201810.0384.v1

Mesoscale Laser 3D Printing

Linas Jonušauskas, Darius Gailevičius, Sima Rekštytė, Tommaso Baldacchini, Saulius Juodkazis, Mangirdas Malinauskas

Subject: Physical Sciences, Applied Physics Keywords: direct laser writing, multiphoton processing, laser 3D nanolithography, optical 3D printing, microstructures, nanotechnology, mesoscale, two-photon polymerization, microoptics, SZ2080

Online: 17 October 2018 (11:26:32 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints201802.0021.v1

In Vitro Antibacterial Activities of Aniline Dithiocarbamate Crystals with its Corresponding Oxovanadium(IV) and Zinc(II) Coordination Compounds

Ayodele Odularu, Peter Adewale Ajibade, Albert Bolhuis

Subject: Chemistry And Materials Science, Medicinal Chemistry Keywords: Keywords: one-pot synthesis; single crystal x-ray crystallography; oxovanadium(IV); zinc(II); spectroscopic studies; in vitro antibacterial studies.

Online: 2 February 2018 (16:00:10 CET)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202104.0259.v1

Bio-Functionalization of a Novel Biocompatible High Entropy Alloy Used For Bone Implants

Mirela Maria Codescu, Alina Vladescu, Victor Geanta, Ionelia Voiculescu, Iulian Pana, Mihaela Dinu, Adrian Emil Kiss, Viorel Braic, Delia PATROI, Virgil E MARINESCU, Iordoc Mihai

Subject: Chemistry And Materials Science, Biomaterials Keywords: VAR alloy obtaining; Biomedical applications; Apatite films; Corrosion, X-ray method, Electron microscopy; Hardness

Online: 9 April 2021 (13:24:09 CEST)

Show abstract| Download PDF| Share

Preprint REVIEW | doi:10.20944/preprints201811.0195.v1

The Origin of the Most Energetic Galactic Cosmic Rays: Supernova Explosions into Massive Star Plasma Winds

Peter Biermann, Philipp Kronberg, Michael Allen, Athina Meli, Eun-Suk Seo

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: Cosmic Rays; Massive Star Supernovae; Cosmic Ray Knee and Ankle.

Online: 8 November 2018 (09:53:33 CET)

Show abstract| Download PDF| Share

We propose that the high energy Cosmic Ray particles around the spectral turn-down commonly called the {\it knee} and up to the upturn, commonly called the {\it ankle}, mostly come from Blue Super Giant star explosions. At the upturn, i.e. the {\it ankle}, Cosmic Rays probably switch to another source class, most likely extragalactic sources. To show this we recently compiled a set of Radio Supernova data to list the magnetic field, shock speed and radius scale (Biermann et al. 2018) \cite{Biermann18}. Using particle acceleration theory at shocks, those numbers can be transformed into characteristic {\it knee} and {\it ankle} energies. Without adjusting any free parameters both of these observed energies are directly indicated by the supernova data. We now proceed to the next step in the argument, and use the Supernova Remnant data of the starburst galaxy M82. Assuming that they are Blue Supergiant star explosions, the shock will race to their outer edge with a magnetic field that follows ${B (r) \, r \, \sim \, const.}$. We argue that the shock runs through the entire magnetic plasma wind region at full speed all the way out to the wind-shell, which is of order parsec scale. The speed is observed to be $\sim \, 0.1 \, c$ at about ${10^{16} \, {\rm cm}}$ radius in the plasma wind. This demonstrates how Blue Supergiant star explosions can provide the Cosmic Ray particles across the {\it knee} and up to the {\it ankle} energy range. The data from the CREAM (Cosmic Ray Energetics and Mass Experiment) mission will test this cosmic ray concept which is reasonably well grounded in two independent radio supernova data sets. The next step in developing our understanding is to obtain accurate Cosmic Ray data near to the {\it knee}, and use unstable isotopes of Cosmic Ray nuclei at high energy to probe the "piston" driving the explosion. We plan to combine these data with the physics of the budding black hole which is probably forming in each of these stars to learn more.

Preprint ARTICLE | doi:10.20944/preprints201710.0132.v1

Accelerated Benders’ Decomposition for Integrated Forward/Reverse Logistics Network Design under Uncertainty

Vahab Vahdat, Mohammad Ali vahdatzad

Subject: Engineering, Industrial And Manufacturing Engineering Keywords: integrated forward/reverse logistics network; accelerated benders’ decomposition; two-stage stochastic programming

Online: 20 October 2017 (03:07:28 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints201903.0166.v1

High Consistency of Structure-Based Design and X-Ray Crystallography: Design, Synthesis, Kinetic Evaluation and Crystallographic Binding Mode Determination of Biphenyl-N-Acyl-β-D-Glucopyranosylamines as Glycogen Phosphorylase Inhibitors

Thomas Fischer, Symeon M. Koulas, Anastasia S. Tsagkarakou, Efthimios Kyriakis, George A. Stravodimos, Vassiliki T. Skamnaki, Panagiota G.V. Liggri, Spyros E. Zographos, Rainer Riedl, Demetres D. Leonidas

Subject: Chemistry And Materials Science, Medicinal Chemistry Keywords: Structure-based design; glycogen phosphorylase inhibitor; glycogen metabolism; type 2 diabetes; X-ray crystallography; N-acyl-β-D-glucopyranosylamine

Online: 15 March 2019 (14:06:06 CET)

Show abstract| Download PDF| Supplementary Files| Share

Preprint ARTICLE | doi:10.20944/preprints201710.0030.v1

The Analysis of Nonlinear Vibrations of Top Tensioned Cantilever Pipes Conveying Pressurized Steady Two-Phase Flow under Thermal Loading

Adeshina Adegoke, Ayo Oyediran

Subject: Engineering, Mechanical Engineering Keywords: Hamilton’s principle; Nonlinear vibration; Two-phase flow; Critical mixture velocity; Cantilever pipes; Perturbation method

Online: 6 October 2017 (08:31:13 CEST)

Show abstract| Download PDF| Share

Preprint SHORT NOTE | doi:10.20944/preprints201711.0029.v1

Di-Silicate Dental Ceramic Surface Preparation by 1070 nm Fiber Laser: Thermal and Ultrastructural Analysis

Carlo Fornaini, Federica Poli, Elisabetta Merigo, Nathalie Brulat-Bouchard, Ahmed El Gamal, Jean-Paul Rocca, Stefano Selleri, Annamaria Cucinotta

Subject: Medicine And Pharmacology, Dentistry And Oral Surgery Keywords: di-silicate ceramics; fiber lasers; Fiber Bragg Grating; Energy Dispersive X-ray Spectroscopy

Online: 5 November 2017 (11:47:29 CET)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints201909.0024.v1

Isolation and Purification of an Antibiotic Polyketide JBIR-99 from the Marine Fungus Meyerozyma guilliermondii by High-Speed Counter-Current Chromatography

Hankui Wu, Jianmin Liu, Ninghui Duan, Ru Han, Xinxin Zhang, Xiaoyu Leng, Wenjie Liu, Liwen Han, Xiaobin Li, Shu Xing, Yongchun Zhang, Mingyang Zhou

Subject: Chemistry And Materials Science, Medicinal Chemistry Keywords: JBIR-99; high-speed counter-current chromatography; polyketide; NMR spectroscopy; mass spectroscopy; X-ray crystallography; Meyerozyma guilliermondii

Online: 2 September 2019 (11:20:28 CEST)

Show abstract| Download PDF| Supplementary Files| Share

Preprint ARTICLE | doi:10.20944/preprints201806.0048.v1

Proposal of an Alternative UAV Engine Organic Coolants

Alon Davidy

Subject: Engineering, Automotive Engineering Keywords: UAV; diesel engine; piston; two phase flow; fatigue cracking; heat transfer analysis; structural analysis; water; boiling point; two-phase flow; organic coolant; DOWTHERM A organic fluid

Online: 5 June 2018 (06:08:12 CEST)

Show abstract| Download PDF| Supplementary Files| Share

Preprint ARTICLE | doi:10.20944/preprints201803.0228.v1

Quantification of the Impact of Photon Distinguishability on Measurement-Device- Independent Quantum Key Distribution

Garrett Simon, Blake Huff, William Meier, Lee Harrell

Subject: Physical Sciences, Quantum Science And Technology Keywords: Measurement-Device-Independent Quantum Key Distribution; Quantum Optics; Two-Photon Interference

Online: 27 March 2018 (15:24:03 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints201805.0118.v1

Chiral Dirhodium(II) Carboxylates: New Insights into the Effect of Ligand Stereo-Purity on Catalyst Structure and Enantioselectivity

Frady Gouany, Hannah Bollard, Michael Gardiner, Ashraf Ghanem

Subject: Chemistry And Materials Science, Organic Chemistry Keywords: Dirhodium(II) complexes; Rh2(S-PTTL)4; Asymmetric Catalysis; Cyclopropanation; X-Ray Crystallography; Chiral Catalysis

Online: 7 May 2018 (14:56:29 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202012.0750.v1

A Thermal-Hydraulic Model for the Stagnation of Solar Thermal Systems with Flat-Plate Collector Arrays

Ralph Eismann, Sebastian Hummel, Federico Giovannetti

Subject: Engineering, Energy And Fuel Technology Keywords: Solar thermal; flat-plate collector; stagnation; steam range; two-phase mixture model; thermal-hydraulic model.

Online: 30 December 2020 (10:02:25 CET)

Show abstract| Download PDF| Share

Preprint REVIEW | doi:10.20944/preprints202208.0235.v1

Cyber Security; Etiology and Importance

Syed Jawaid

Subject: Computer Science And Mathematics, Security Systems Keywords: Malware; cyber security; cyber-attacks; two factor authentication; software; targeting; privacy; causes of cyber attacks

Online: 12 August 2022 (10:33:03 CEST)

Show abstract| Download PDF| Share

Preprint REVIEW | doi:10.20944/preprints202110.0083.v1

Multilayer Reflective Coatings for BEUV Lithography: A Review

Paul C. Uzhoma, Salman Shabir, Huan Hu, Paul C. Okonkwo, Oleksiy V. Penkov

Subject: Physical Sciences, Condensed Matter Physics Keywords: BEUV lithography; Multilayer mirrors; X-ray optics; reflectivity

Online: 5 October 2021 (12:44:49 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints201710.0140.v1

Influence of Alkali Metal Substitution on the Phase Transition Behavior of CsGaQ2 (Q = S, Se)

Daniel Friedrich, Marc Schlosser, Martin Etter, Arno Pfitzner

Subject: Chemistry And Materials Science, Inorganic And Nuclear Chemistry Keywords: chalcogenogallates; polymorphism; solid solutions; in situ X-ray diffraction; synchrotron radiation; rietveld refinement

Online: 20 October 2017 (12:53:24 CEST)

Show abstract| Download PDF| Supplementary Files| Share

Preprint ARTICLE | doi:10.20944/preprints201801.0245.v1

VpStyA1 and VpStyA2B of Variovorax paradoxus EPS: Rather an Aryl Alkyl Sulfoxidase than a Styrene Epoxidizing Monooxygenase

Dirk Tischler, Ringo Schwabe, Lucas Siegel, Kristin Joffroy, Stefan R. Kaschabek, Anika Scholtissek, Thomas Heine

Subject: Biology And Life Sciences, Biochemistry And Molecular Biology Keywords: sulfoxidation; epoxidation; two-component monooxygenase; flavoprotein; enantioselective biotransformation; fusion protein; protein linker; soil microorganism

Online: 25 January 2018 (17:14:33 CET)

Show abstract| Download PDF| Supplementary Files| Share

Preprint ARTICLE | doi:10.20944/preprints201710.0077.v1

Global Calibration of Multi-Cameras Based on Refractive Projection and Ray Tracing

Mingchi Feng, Xiang Jia, Jingshu Wang, Song Feng, Taixiong Zheng

Subject: Engineering, Other Keywords: camera calibration; multi-cameras system; ray tracing; glass checkerboard; bundle adjustment

Online: 12 October 2017 (04:55:15 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints201807.0616.v2

Mechanical Properties and In-Situ Deformation Imaging of Micro-Lattices Manufactured by Laser Based Powder Bed Fusion

Anton du Plessis, Dean-Paul Kouprianoff, Ina Yadroitsava, Igor Yadroitsev

Subject: Engineering, Industrial And Manufacturing Engineering Keywords: laser powder bed fusion; additive manufacturing; X-ray tomography; in-situ imaging; Ti6Al4V; lattice structures

Online: 30 August 2018 (06:12:34 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints201802.0081.v1

Relative Velocity Measurement with Spectrometer and Its Integrated Navigation

Zhonghua Wang, Yiming Peng, Jiu Liu

Subject: Environmental And Earth Sciences, Remote Sensing Keywords: navigation; velocity measurement; X-ray pulsar; Mars explorer; formation flight

Online: 11 February 2018 (06:46:14 CET)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints201805.0190.v1

Boron Monochalcogenides; Stable and Strong Two-Dimensional Wide Band-Gap Semiconductors

Bohayra Mortazavi, Timon Rabczuk

Subject: Engineering, Mechanical Engineering Keywords: two-dimensional semiconductor; first-principles; mechanical; thermal

Online: 14 May 2018 (11:46:59 CEST)

Show abstract| Download PDF| Share

Preprint COMMUNICATION | doi:10.20944/preprints201807.0583.v1

Enhancement Photocatalytic Activity of the Heterojunction of Two-Dimensional Hybrid Semiconductors ZnO/V₂O₅

Juan Aliaga, Nasla Cifuentes, Guillermo Gonzalez, Clivia Sotomayor-Torres, Eglantina Benavente

Subject: Chemistry And Materials Science, Chemical Engineering Keywords: photocatalysis; heterojunction; two dimensional semiconductor; ZnO; V2O5; methylene blue degradation

Online: 30 July 2018 (10:46:33 CEST)

Show abstract| Download PDF| Supplementary Files| Share

Preprint ARTICLE | doi:10.20944/preprints201812.0236.v2

Specificity of Escherichia coli Heat-Labile Enterotoxin Investigated by Single-Site Mutagenesis and Crystallography

Julie E. Heggelund, Joel B. Heim, Gregor Bajc, Vesna Hodnik, Gregor Anderluh, Ute Krengel

Subject: Biology And Life Sciences, Biochemistry And Molecular Biology Keywords: bacterial toxin; cholera toxin; Escherichia coli heat-labile enterotoxin; lectin; N-acetyllactosamine binding; neutral glycosphingolipids; protein-carbohydrate interactions; surface plasmon resonance spectroscopy; X-ray crystal structure

Online: 28 January 2019 (15:23:24 CET)

Show abstract| Download PDF| Supplementary Files| Share

Preprint ARTICLE | doi:10.20944/preprints201903.0097.v1

Synthesis and Characterization of Te Nanotubes Decorated with Pt Nanoparticles for Fuel Cell Anode/Cathode Working at Neutral pH

Maria Rachele Guascito, Daniela Chirizzi, Emanuela Filippo, Francesco Milano, Antonio Tepore

Subject: Chemistry And Materials Science, Electrochemistry Keywords: Te nanotubes decorated with Pt nanoparticles; fuel cell neutral pH; oxygen reduction reaction; methanol oxidation reaction; X-ray photoelectron spectroscopy.

Online: 7 March 2019 (13:49:46 CET)

Show abstract| Download PDF| Supplementary Files| Share

Preprint ARTICLE | doi:10.20944/preprints202007.0591.v1

A CNN Classification Model For Diagnosis Covid19

Ahmed Abdullah Farid, hatem khater, gamal selim

Subject: Computer Science And Mathematics, Artificial Intelligence And Machine Learning Keywords: Bacterial -Viral Pneumonia; COVID-19; X-ray Image; Deep Learning; Convolution Neural Network

Online: 24 July 2020 (14:02:07 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints201801.0204.v1

Formation of Deformation-Induced Products in a Metastable β-titanium Alloy during High Temperature Compression

Alireza Samiee, Gilberto Casillas, Mansur Ahmed, Dmytro G. Savvakin, Ryan Naseri, Elena Pereloma

Subject: Chemistry And Materials Science, Metals, Alloys And Metallurgy Keywords: metastable Ti alloy; high temperature deformation; stress-induced ω; stress-induced α˝ martensite; transmission electron microscopy; slip; X-ray diffraction.

Online: 22 January 2018 (17:17:03 CET)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints201812.0149.v1

Supramolecular Organogels Based on N-Benzyl, N’-Acylbispidinols

Alexey Medved'ko, Alexander Dalinger, Vyacheslav Nuriev, Vera Semashko, Andrei Filatov, Alexander Ezhov, Andrei Churakov, Judith A. K. Howard, Andrey Shiryaev, Alexander Baranchikov, Vladimir Ivanov, Sergey Vatsadze

Subject: Chemistry And Materials Science, Organic Chemistry Keywords: Organic nanomaterials, bispidines; supramolecular gels; SEM, TEM, AFM study; X-ray diffraction; FT IR-spectroscopy; ATR-spectroscopy; SAXS

Online: 12 December 2018 (13:06:31 CET)

Show abstract| Download PDF| Supplementary Files| Share

Preprint ARTICLE | doi:10.20944/preprints201711.0203.v2

A Self-Consistent Physical Model of the Bubbles in a Gas-Solid Two-Phase Flow

H. M. Dong, J. F. He, C. L. Duan, Y. M. Zhao

Subject: Physical Sciences, Thermodynamics Keywords: self-consistent physical model; bubbles; gas-solid two-phase flow

Online: 6 February 2018 (06:54:26 CET)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints201908.0085.v1

Synthesis, Characterization, and Crystal Structure Determination of a New Lithium Zinc Iodate Polymorph LiZn(IO₃)₃

Zoulikha Hebboul, Christine Galez, Djamal Benbertal, Sandrine Beauquis, Yannick Mugnier, Abdelnour Benmakhlouf, Mohamed Bouchenafa, Daniel Errandonea

Subject: Chemistry And Materials Science, Materials Science And Technology Keywords: iodate; crystal structure; x-ray diffraction; density functional theory; infrared absorption

Online: 7 August 2019 (03:42:19 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202108.0443.v1

Welding of Copper to Aluminium With Laser Beam Wavelength of 515 nm

Karthik Mathivanan, Peter Plapper

Subject: Engineering, Industrial And Manufacturing Engineering Keywords: Laser welding; Cu-Al welding; green laser; Micro-structure analysis; Energy dispersive X-ray spectroscopy (EDS))

Online: 23 August 2021 (13:28:28 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints201905.0225.v1

Use of GeneXpert and the Role of an Expert Panel in Improving Clinical Diagnosis of Smear-Negative Tuberculosis Cases

Jovilia Abong, Victoria Dalay, Ivor Langley, Ewan Tomeny, Danaida Marcelo, Victor Mendoza, Anna Marie Celina Garfin, S. Bertel Squire, Charles Yu

Subject: Medicine And Pharmacology, Pathology And Pathobiology Keywords: GeneXpert; TB Expert Panel; Smear Negatives; Clinically Diagnosed TB; TB DOTS; Chest X-ray

Online: 17 May 2019 (11:18:34 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints201805.0022.v1

Facile Low Temperature Hydrothermal Synthesis of BaTiO₃ Nanoparticles Studied by In Situ X-ray Diffraction

Ola Gjoennes Grendal, Anders Bank Blichfeld, Susanne Linn Skjarvø, Wouter van Beek, Sverre Magnus Selbach, Tor Grande, Mari-Ann Einarsrud

Subject: Chemistry And Materials Science, Nanotechnology Keywords: BaTiO3; hydrothermal synthesis; in situ; X-ray diffraction; nanoparticles

Online: 2 May 2018 (11:25:23 CEST)

Show abstract| Download PDF| Supplementary Files| Share

Preprint ARTICLE | doi:10.20944/preprints201912.0274.v1

Effect of Recycled Ceramic Waste Content on the Properties of Unsaturated Polyester Resin

Mohamed Farsane, Abdellah Anouar, Souad Chah, Miloudi Bouzziri

Subject: Chemistry And Materials Science, Organic Chemistry Keywords: ceramic waste particles; unsaturated polyester resin; X-ray diffraction; water absorption; thermal degradation; curing process

Online: 20 December 2019 (11:08:27 CET)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints201810.0710.v1

Virtual Asphalt to Predict Roads’ Air Voids and Hydraulic Conductivity

Mustafa Aboufoul, Andrea Chiarelli, Isaac Triguero, Alvaro Garcia

Subject: Engineering, Civil Engineering Keywords: computational design; optimisation; porosity; pore networks; X-ray CT; 3D printing

Online: 30 October 2018 (07:27:29 CET)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints201810.0110.v1

In Situ SAXS Measurement and Molecular Dynamics Simulation of Magnetic Alignment of Hexagonal LLC Nanostructures

Weiwei Cong, Weimin Gao, Christopher Garvey, Ludo Dumee, Juan Zhang, Ben Kent, Guang Wang, Fenghua She, Lingxue Kong

Subject: Chemistry And Materials Science, Materials Science And Technology Keywords: Alignment, Magnetic field, Hexagonal, Lyotropic liquid crystals, Nanofiltration, in situ small angle X-ray scattering (SAXS)

Online: 5 October 2018 (16:33:35 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202106.0156.v1

Strain and Grain Size of CeO₂ and TiO₂ Nanoparticles: Comparing Structural and Morphological Methods

Yamerson Canchanya-Huaman, Angie F. Mayta-Armas, Jemina Pomalaya-Velasco, Yéssica Bendezú-Roca, Jorge Andres Guerra, Juan A. Ramos-Guivar

Subject: Chemistry And Materials Science, Biomaterials Keywords: X-ray diffraction; CeO2; TiO2; crystallite size; strain; TEM; μ-Raman

Online: 7 June 2021 (09:25:14 CEST)

Show abstract| Download PDF| Supplementary Files| Share

Preprint ARTICLE | doi:10.20944/preprints201811.0581.v1

Implementation of Fuzzy C-Means and Possibilistic C-Means Clustering Algorithms, Cluster Tendency Analysis and Cluster Validation

Md. Abu Bakr Siddique, Rezoana Bente Arif, Mohammad Mahmudur Rahman Khan, Zahidun Ashrafi

Subject: Computer Science And Mathematics, Data Structures, Algorithms And Complexity Keywords: Two-dimensional clustering, Soft clustering, Fuzzy c-means(FCM), Possibilistic c-means (PCM), cluster tendency, VAT algorithm, cluster validation, PC, DI, DBI, noise point

Online: 26 November 2018 (10:19:05 CET)

Show abstract| Download PDF| Share

Preprint REVIEW | doi:10.20944/preprints201902.0085.v1

Recent Developments in the Field of the Metal-Insulator Transition in Two Dimensions

Alexander Shashkin, Sergey Kravchenko

Subject: Physical Sciences, Condensed Matter Physics Keywords: Metal-insulator transition; strongly-correlated electrons; two-dimensional electron systems; low temperatures

Online: 11 February 2019 (09:02:33 CET)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202107.0566.v2

Degradation Analysis of Thin Mg-xAg Wires Using X-Ray Near-Field Holotomography

Sebastian Meyer, Andreas Wolf, Daniela Sanders, Kamila Iskhakova, Hanna Ćwieka, Stefan Bruns, Silja Flenner, Imke Greving, Johannes Hagemann, Regine Willumeit-Römer, Björn Wiese, Berit Zeller-Plumhoff

Subject: Chemistry And Materials Science, Biomaterials Keywords: X-ray computed tomography; magnesium-silver alloy; wire; degradation; near-field holotomography

Online: 8 December 2021 (14:26:38 CET)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints201805.0201.v1

CUBIT: Capacitive qUantum BIT

Sina Khorasani

Subject: Physical Sciences, Applied Physics Keywords: graphene; two-dimensional materials; nonlinear quantum circuits; quantum bits

Online: 15 May 2018 (05:29:06 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints201908.0095.v1

Crystal Structure of African Swine Fever Virus A179L with the Autophagy Regulator Beclin

Suresh Banjara, Gareth Shimmon, Linda Dixon, Christopher Netherton, Mark Hinds, Marc Kvansakul

Subject: Biology And Life Sciences, Virology Keywords: Autophagy, Bcl-2, Beclin, ASFV, X-ray crystallography

Online: 7 August 2019 (10:10:14 CEST)

Show abstract| Download PDF| Supplementary Files| Share

Preprint ARTICLE | doi:10.20944/preprints202010.0298.v2

Cosmic Ray Extremely Distributed Observatory

Piotr Homola, Dmitriy Beznosko, Gopal Bhatta, Łukasz Bibrzycki, Łukasz Bratek, Michalina Borczyńska, Nikolay M. Budnev, Dariusz Burakowski, David Edwin Alvarez-Castillo, Kevin Almeida Cheminant, Aleksander Ćwikła, Punsiri Dam-o, Niraj Dhital, Alan Duffy, Piotr Głownia, Krzysztof Gorzkiewicz, Dariusz Góra, Alok C. Gupta, Zuzana Hlávková, Martin Homola, Joanna Jałocha, Robert Kamiński, Michał Karbowiak, Marcin Kasztelan, Renata Kierepko, Marek Knap, Péter Kovács, Szymon Kuliński, Bartosz Łozowski, Marek Magryś, Mikhail V. Medvedev, Justyna Mędrala, Jerzy W. Mietelski, Justyna Miszczyk, Alona Mozgova, Antonio Napolitano, Vahab Nazari, Y. Jack Ng, Michał Niedźwiecki, Cristina Oancea, Bogusław Ogan, Gabriela Opiła, Krzysztof Oziomek, Maciej Pawlik, Marcin Piekarczyk, Bożena Poncyljusz, Jerzy Pryga, Matías Rosas, Krzysztof Rzecki, Jilberto Zamora-Saa, Katarzyna Smelcerz, Karel Smolek, Weronika Stanek, Jarosław Stasielak, Slawomir Stuglik, Jolanta Sulma, Oleksandr Sushchov, Manana Svanidze, Kyle Tam, Arman Tursunov, José-M. Vaquero, Tadeusz Wibig, Krzysztof W. Woźniak

Subject: Physical Sciences, Nuclear And High Energy Physics Keywords: cosmic rays; cosmic ray ensembles; extensive air showers; large scale cosmic ray correlations; CREDO Collaboration

Online: 15 October 2020 (16:13:43 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints201910.0168.v1

An Affordable Image Detector and a Low-Cost Evaluation System for Computed Tomography Using Neutrons, X-Rays or Visible Light

Burkhard Schillinger

Subject: Physical Sciences, Radiation And Radiography Keywords: neutron imaging; neutron detector; X-ray detector; CCD camera; CMOS camera; collimator; X-rays; image processing; computed tomography; CT reconstruction

Online: 15 October 2019 (11:15:26 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202104.0294.v1

P^N bridged Cu(I) Dimers Featuring both TADF and Phosphorescence. From Overview Towards Detailed Case Study of the Excited Singlet and Triplet States.

Thomas Hofbeck, Thomas A. Niehaus, Michel Fleck, Uwe Monkowius, Hartmut Yersin

Subject: Chemistry And Materials Science, Analytical Chemistry Keywords: Dimeric copper(I) complexes; PN phosphine ligands; X-ray structures; Combined thermally activated delayed fluorescence (TADF) and phosphorescence; Combined singlet and triplet harvesting; High emission quantum yields; Tunability of photophysical properties; Zero-field splitting (ZFS), Spin-lattice relaxation (SLR); Triplet substate decay components.

Online: 12 April 2021 (12:41:01 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints201805.0284.v1

Elimination of Common-mode Voltage in Dual Two-level Voltage Source Inverter Fed Open-end Load using a Discontinuous SVM Technique

Nuttawout Buarat, Yuttana Kumsuwan

Subject: Engineering, Electrical And Electronic Engineering Keywords: dual two-level voltage source inverter; common-mode voltage; discontinuous space vector modulation schemes; centralizing pulse width modulation; open-end load

Online: 22 May 2018 (05:11:06 CEST)

Show abstract| Download PDF| Share

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

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

Laszlo Marosi

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

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

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints202101.0380.v1

A Model for Characteristic X-Ray Emission in Electron Probe Microanalysis based on the Spherical Harmonic (PN) Method for Electron Transport

Jonas Buenger, Silvia Richter, Manuel Torrilhon

Subject: Chemistry And Materials Science, Biomaterials Keywords: EPMA; deterministic electron transport; k-ratio; moment method; spherical harmonic (PN) approximation; characteristic X-Ray emission

Online: 19 January 2021 (13:20:53 CET)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints201811.0224.v1

Determinants of Smallholder Teff Farmers’ Market Participation; A Case Study In Gena-Bossa District, Dawro Zone, Ethiopia

Deresse Dalango, Wondaferhu Mulugeta, Tesfaye Melaku

Subject: Business, Economics And Management, Economics Keywords: Teff, Smallholder, market participation, Heckman two stages, Gena-Bossa.

Online: 8 November 2018 (15:11:03 CET)

Show abstract| Download PDF| Share

Increasing market participation among smallholder farmers have a big potential to uplift living standards of poor through increasing production and consumption pattern. Although, smallholder farming made 95% of total crop production in Ethiopia, they are exposed to a marketing bottleneck that hinders benefits from their produce. The objective of this study was analyzing factors determining smallholder Teff farmer decision to participate in output market and level of marketed output.The study used data from 190 respondents from four selected Teff dominant kebeles of Gena-Bossa districts in Dawro Zone, through structured questioner. This investigation was imperative because no adequate research has been done in study area in examining the hindering factors of farmers’ market participation. Moreover, in the prior study, different authors come up with varied outcomes in diverse country and geographic location concerning poor farmers’ market participation decision. The descriptive statistics and Heckman two stage econometric methods were employed to analyze data collected from sampled household. The significance of coefficient of inverse Mill’s ratio ( ) indicates the presence of self-selection bias and the effectiveness of applying Heckman two stage model. The results of study show that the smallholder decision to participate in output market were positively influenced by size of land holding, availability of family labor force, education status of household head, accessibility of credit service and access to market price information. On the other hand, size of family member, sex of house hold head being female and distance to market place discourage probability of Teff farmer market participation decision. Moreover, the second stage estimation reveals that, the education status of house hold head, size of farm land, amount of Teff crop produced, accessibility of market information, the size of family labor force and being member to farm cooperative increase the quantity of marketable output, whereas, large number of family size decline the level of Teff crops marketed. The policy that assist poor farmers in obtaining market skills; create affordable credit service; strengthen community based producer groups and capacitating the females socially and economically in the community believed to minimize the problems encountering small farmers in a way to market their crop

Preprint ARTICLE | doi:10.20944/preprints201812.0251.v1

Charged Dark Matters, Missing Neutrinos, Cosmic Rays and Extended Standard Model

Jae-Kwang Hwang

Subject: Physical Sciences, Particle And Field Physics Keywords: charged dark matters, missing neutrinos, cosmic rays, gravitation constant, Coulomb’s constant, extended standard model, anti-Helium cosmic ray

Online: 20 December 2018 (12:54:24 CET)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints201805.0332.v1

Microdrop Deposition Technique: Preparation and Characterization of Diluted Suspended Particulate Samples

Salvatore Macis, Giannantonio Cibin, Valter Maggi, Giovanni Baccolo, Dariush Hampai, Barbara Delmonte, Alessandro D'Elia, Augusto Marcelli

Subject: Chemistry And Materials Science, Other Keywords: ultra-dilution; droplets; water; evaporation; X-ray fluorescence

Online: 24 May 2018 (05:43:52 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints201909.0207.v1

Design of ethylene-vinyl acetate copolymer fiber with two-way shape memory effect

Xiaoming Qi, Wentong Yang, Laiming Yu, Wenjun Wang, Haohao Lu, Yanglong Wu, Shanwen Zhu, Yaofeng Zhu, Xiangdong Liu, Yubing Dong, Yaqin Fu

Subject: Chemistry And Materials Science, Polymers And Plastics Keywords: shape memory polymer fiber; two-way shape memory effect; melt spinning; UV curing

Online: 18 September 2019 (13:00:34 CEST)

Show abstract| Download PDF| Share

Preprint ARTICLE | doi:10.20944/preprints201810.0013.v1

Mechanochemical Induced Structure Transformations in Lithium Titanates: A Detailed PXRD and 6Li MAS NMR Study

Dennis Becker, Robert Haberkorn, Guido Kickelbick

Subject: Chemistry And Materials Science, Inorganic And Nuclear Chemistry Keywords: lithium titanium oxide; mechanochemistry; high energy ball milling; X-ray diffraction; Rietveld refinement; 6Li SPE MAS NMR; impedance spectroscopy

Online: 1 October 2018 (14:20:29 CEST)

Show abstract| Download PDF| Supplementary Files| Share

Search Results

479 articles found