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Preprint ARTICLE | doi:10.20944/preprints202010.0516.v1

Frequency Response Characteristic (FRC) Curve and Fast Frequency Response Assessment in High Renewable Power Systems

Shutang You

Subject: Engineering, Energy And Fuel Technology Keywords: Frequency response characteristic (FRC) curve; frequency response; renewable generation; governor

Online: 26 October 2020 (11:40:43 CET)

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Preprint ARTICLE | doi:10.20944/preprints201610.0022.v1

Transcriptome Profiling Analysis of Wolf Spider Pardosa pseudoannulata (Araneae: Lycosidae) after Cadmium Exposure

Chang-chun Li, Yong Wang, Guo-yuan Li, Yueli Yun, Yu-jun Dai, Jian Chen, Yu Peng

Subject: Biology And Life Sciences, Animal Science, Veterinary Science And Zoology Keywords: P. pseudoannulata; Cadmium; Transcriptome; RT-qPCR

Online: 8 October 2016 (11:07:25 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202305.0250.v1

Time Series Optimization-Based Characteristic Curve Calculation for Local Reactive Power Control Using pandapower-PowerModels Interface

Zheng Liu, Maryam Majidi, Haonan Wang, Denis Mende, Martin Braun

Subject: Engineering, Electrical And Electronic Engineering Keywords: characteristic curve; optimal power flow; distribution grids; voltage stability; reactive power flexibility

Online: 4 May 2023 (09:57:16 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202402.1061.v1

Enhancing Reliability in Wind Turbine Power Curve Estimation

Pere Marti-Puig, José Ángel Hernández, Jordi Solé-Casals, Moisès Serra-Serra

Subject: Engineering, Energy And Fuel Technology Keywords: Wind Power Curve Modeling; Artificial neural networks (ANN); Wind Turbine (WT); SCADA Data.; Industrial AI

Online: 19 February 2024 (12:24:46 CET)

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Preprint ARTICLE | doi:10.20944/preprints202407.0517.v1

Comprehensive Evaluation of Texture Quality of ‘Huizao’ (Ziziphus jujuba Mill. Huizao) and Its Response to Climate Factors in Four Main Production Areas of Southern Xinjiang

TianFa Guo, Qianqian Qiu, Chuanjiang Zhang, Xiangyu Li, Minjuan Lin, Cuiyun Wu, Shuangquan Jing, Xingang Li, Zhenlei Wang

Subject: Biology And Life Sciences, Horticulture Keywords: Ziziphus jujuba Mill. ‘Huizao’; Texture quality; Comprehensive evaluation; Climate factors; Southern Xinjiang

Online: 5 July 2024 (12:40:05 CEST)

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A superior variant of dried jujube in China is ‘Huizao’ (HZ) jujube. Nonetheless, detailed evaluations of the texture quality of HZ fruits have been the subject of few studies. Texture is a significant indicator of the sensory and processed quality of a fruit. Here, we differentiate and characterize the texture quality of HZ fruits from the four primary producing regions in southern Xinjiang, as well as develop a system for assessing the texture quality of HZ fruits. Furthermore, five texture indices of HZ fruits from 109 plantations were exhaustively evaluated utilizing principal component analysis, Pearson correlation analysis, and hierarchical clustering analysis. Consequently, by the 10th, 30th, 70th, and 90th percentiles, each index was classified into five grades—lower, medium, high, and higher. Correlation investigation indicated strong relationships between the springiness, chewiness, cohesiveness, gumminess, and hardness of HZ fruits. Springiness, hardness, and adhesiveness are essential indicators that influence the texture of HZ fruits. We used clustering analysis to separate the six texture indices into three major categories (hard factor, stick-elastic factor, and adhesive factor), with indices representing hardness, springiness, and adhesiveness, respectively. Furthermore, according to the factor molecules, the texture quality of HZ fruits in the four production areas was evaluated as Bazhou (1.24) > Hotan (0.773) > Kashi (-0.577) > Aksu (-0.852). RDA analysis of six texture quality parameters and 24 climate conditions identified higher mean temperature (TEM) and lower relative humidity (RHU) as the primary factors contributing to the improved texture quality of HZ fruits in Xinjiang. This study identified the texture quality characteristics of HZ fruits in four major producing areas of Southern Xinjiang, and it offered a theoretical foundation for optimizing the dominant producing areas and regional production of HZ varieties in Xinjiang.

Preprint ARTICLE | doi:10.20944/preprints201608.0007.v2

Hysteresis Characteristic in the Hump Region of a Pump-Turbine Model

Deyou Li, Hongjie Wang, Jinxia Chen, Torbjørn K. Nielsen, Daqing Qin, Xianzhu Wei

Subject: Engineering, Energy And Fuel Technology Keywords: pump turbine; hump characteristic; hysteresis characteristic; experimental investigation

Online: 3 August 2016 (11:49:29 CEST)

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Preprint REVIEW | doi:10.20944/preprints202406.1395.v1

Characteristic of Alternative Fuels and Their Impacts on Exhaust Emissions

Beata Pośpiech

Subject: Chemistry And Materials Science, Chemical Engineering Keywords: alternative fuels; exhaust emissions; power electric vehicles; ethanol; hydrogen

Online: 20 June 2024 (05:20:55 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202409.1528.v1

Assessing Nitrogen Fertilization in Processing Pepper: Critical Nitrogen Curve, and Crop Yield Response

Jose Maria Vadillo, Carlos Campillo, Valme Gonzalez, Henar Prieto

Subject: Biology And Life Sciences, Horticulture Keywords: horticulture; open field; vegetative development; fruit production

Online: 20 September 2024 (03:13:35 CEST)

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

Quasi Cubic Trigonometric Curve and Surface

Guicang Zhang, Kai Wang

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

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

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Preprint ARTICLE | doi:10.20944/preprints201801.0090.v1

Clustering and Curve Fitting by Line Segments

Hrishikesh D. Vinod, Fred Viole

Subject: Business, Economics And Management, Econometrics And Statistics Keywords: clustering; curve fitting; nonparametric regression; smoothing data; polynomial approximation

Online: 10 January 2018 (09:48:23 CET)

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Preprint ARTICLE | doi:10.20944/preprints202408.1384.v1

Characteristic Features of Lif Parameters of Microalgae Alexandrium catenella and Their Dependence on Temperature

Alexander Popik, Sergey Voznesenskiy, Tatiana Dunkay, Evgeniy Gamayunov, Tatiana Orlova

Subject: Physical Sciences, Optics And Photonics Keywords: Alexandrium catenella; Prorocentrum cordatum; HAB; laser-induced fluorescence; fluorescence temperature curves; identification

Online: 20 August 2024 (03:39:19 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202107.0619.v3

Predicting Wealth using Intelligent Quotient, Emotional Awareness, and Culture

Azad Kabir, Raeed Kabir

Subject: Business, Economics And Management, Finance Keywords: Wealth curve; Intelligence quotient (IQ); Emotional Intelligence (EI); Emotional Awareness (EA)

Online: 23 April 2023 (06:05:04 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201804.0269.v1

Wind Turbine Power Curve Upgrades

Davide Astolfi, Francesco Castellani, Ludovico Terzi

Subject: Engineering, Mechanical Engineering Keywords: wind energy; wind turbines; SCADA; retrofitting; performance evaluation

Online: 20 April 2018 (14:11:15 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202407.1524.v1

Global Dynamics of Environmental Kuznets Curve: A Cross-Correlation Analysis of Income and CO2 Emissions

Dora Almeida, Luísa Carvalho, Paulo Ferreira, Andreia Dionísio, Inzamam Ul Haq

Subject: Business, Economics And Management, Economics Keywords: Environmental Kuznets curve; CO2 emissions; Economic growth; Cross-correlation analysis; Income levels; Sustainable development

Online: 19 July 2024 (06:35:19 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202305.0955.v5

Decaying Turbulence as a Fractal Curve

Alexander Migdal

Subject: Computer Science And Mathematics, Analysis Keywords: Turbulence; Fractal; Anomalous dissipation; Fixed point; Velocity circulation; Loop Equations

Online: 6 July 2023 (10:17:05 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202408.1487.v1

Cross-country Ski Skating Style Sub-techniques Detection and Skiing Characteristic Analysis on Snow Using High Precision GNSS

Shunya Uda, Naoto Miyamoto, Kiyoshi Hirose, Hiroshi Nakano, Thomas Stöggl, Vesa Linnamo, Stefan Lindinger, Masaki Takeda

Subject: Biology And Life Sciences, Other Keywords: High precision GNSS; Cross-country skiing; Skating techniques; Sub-technique classification

Online: 21 August 2024 (04:25:43 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202405.0397.v1

Conclusive Algorithm with Kink Effects for Fitting 3-D FinFET and Planar MOSFET Characteristic Curves

Hsin-Chia Yang, Sung-Ching Chi, Han-Ya Yang, Yu-Tzu Yang

Subject: Engineering, Electrical And Electronic Engineering Keywords: Keywords: FinFET,.Early Voltage, channel length and width

Online: 7 May 2024 (14:11:43 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201609.0082.v1

Analysis of Inflection and Singular Points on Parametric Curve with a Shape Factor

Zhi Liu, Chen Li, Jieqing Tan, Xiaoyan Chen

Subject: Computer Science And Mathematics, Computational Mathematics Keywords: shape factor; singular points; inflection points; local convexity; global convexity

Online: 23 September 2016 (08:04:57 CEST)

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Preprint CASE REPORT | doi:10.20944/preprints202008.0049.v1

Drinking Water and Diarrheal Characteristic Cases in Darbendikhan City

Sabah Shareef Mohammed, Yadgar Hussien Hama-karim, Mohammed Ibrahim Mohialdeen Gubari

Subject: Environmental And Earth Sciences, Water Science And Technology Keywords: diarrhoeal cases; drinking water; water sources; water pollution; Darbandikhan Lake

Online: 2 August 2020 (17:41:51 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201608.0144.v1

Statistical Study on Crash Frequency Model Using GNB Models of Freeway Sharp Horizontal Curve Based on Interactive Influence of 3 Explanatory Variables

Yanjie Zeng, Xiaofei Wang, Lineng Liu, Xinwei Li, Caifeng Jiang

Subject: Engineering, Civil Engineering Keywords: freeway; crash prediction model (CPM); sharp horizontal curve segment (SHCS); interactive influence among three explanatory variables; generalized negative binomial (GNB)

Online: 15 August 2016 (09:47:37 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202304.1251.v1

Improved Curve–Flattening for Flexible Space Robotics

Wenxin Li, Timothy Sands

Subject: Engineering, Aerospace Engineering Keywords: robotics; flexible; control; structural filter; space robotics

Online: 30 April 2023 (03:39:25 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202201.0435.v1

Flattening the Curve of Flexible Space Robotics

Timothy Sands

Subject: Engineering, Control And Systems Engineering Keywords: robotics; monitoring; repair; replace; infrastructure; space robotics; flexible; structural-controls interaction; trajectory shaping

Online: 28 January 2022 (12:12:26 CET)

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Preprint ARTICLE | doi:10.20944/preprints201704.0176.v1

Bézier Curve Modeling for Neutrosophic Data Problem

Ferhat Taş, Selçuk Topal

Subject: Computer Science And Mathematics, Mathematics Keywords: neutrosophic sets; neutrosophic logic; bézier curve

Online: 27 April 2017 (02:54:02 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202409.0806.v1

The Impact of Forest Quality on Carbon Emission: A Study of China based on Environmental Kuznets Curve

Yuwen Zhang, Xiaolan Wu, Shengyuan Wang

Subject: Environmental And Earth Sciences, Environmental Science Keywords: Forest quality; Environmental Kuznets Curve; Symbiotic System; Emission Reduction Pathway

Online: 10 September 2024 (11:13:30 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202406.0497.v1

Evaluation of Mis-Selection of Boundary Vertebrae and Its Effect on Measuring Cobb Angle and Curve Length in Adolescent Idiopathic Scoliosis

José Hurtado-Avilés, Vicente J. León-Muñoz, Fernando Santonja-Medina, Paolo Raimondi, Francisco Martínez-Martínez

Subject: Medicine And Pharmacology, Orthopedics And Sports Medicine Keywords: adolescent idiopathic scoliosis; Cobb angle; measurement errors; radiographic Assessment; spine curvature

Online: 7 June 2024 (15:16:27 CEST)

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The Cobb angle is critical in assessing adolescent idiopathic scoliosis (AIS) patients. This study aimed to evaluate the error in selecting the cranial and caudal limit vertebrae on AIS digital X-rays of experienced and novice observers and its correlation with the error in measuring the Cobb angle and determining the length of the scoliotic curves. Using the TraumaMeter v.873 software, eight raters (four experienced and four novices) independently evaluated 68 scoliotic curves on 42 AIS X-rays across three sessions one month apart according to Hopkins’ criteria of absolute reliability. Two spine specialist experts using the Cobb method established the gold standard measurements. The percentage of error in the selection of the cranial vertebrae (the most-tilted vertebra above the apex) is higher than in the caudal vertebrae (the most-tilted vertebrae below the apex) (44.7%, CI95% 41.05-48.3 compared to 35%, CI95% 29.7-40.4). The error in the choice of the most tilted vertebrae, in number of vertebrae per scoliotic curve, was MBE (mean bias error) =0.45, CI95% 0.38-0.52 in the cranial and MBE=0.35, CI% 0.69-0.91 in the caudal. The percentage of errors in the choice of boundary vertebrae is lower for the experienced than for the novices, both in cranial and caudal. The experienced chose at least one boundary vertebrae incorrectly in 52% of the meas-urements and the novices in 65.1%. The error in the Cobb angle did not depend on the number of boundary vertebrae chosen incorrectly (r=0.198, p=0.111). Of the 50% of Cobb angle measurements closest to the actual value, 55.4% (454) were obtained by incorrectly selecting at least one boundary vertebra. There was a positive correlation (r=0.673, p=0.000) between the error in selecting the boundary vertebrae and the error in determining the length of the scoliotic curves. The error in quantifying the length of scoliotic curves was MBE=0.43, CI95% 0.35-0.51 vertebrae per curve. We can conclude that errors in selecting boundary vertebrae are common among experienced and novice observers, with a greater frequency of error in the cranial vertebrae. There is no correlation between the error in selecting the boundary vertebrae and the error in measuring the Cobb angle. Contrary to the consensus, the accuracy of determining the length of the scoliotic curve is limited by the Cobb method’s reliance on the correct selection of boundary vertebrae. Inappropriate choice of boundary vertebrae leads to an estimated error in determining the length of the scoliotic curves of 0.805 vertebrae for each boundary vertebra chosen incorrectly.

Preprint ARTICLE | doi:10.20944/preprints202407.2180.v1

A Fibration of Fermat Surface in Characteristic

Xiaokun Zhong

Subject: Computer Science And Mathematics, Mathematics Keywords: positive characteristic; fibrations; automorphisms of surfaces

Online: 27 July 2024 (07:02:38 CEST)

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Preprint REVIEW | doi:10.20944/preprints202311.0482.v1

Germline Variants and Characteristic Features of Hereditary Hematological Malignancy Syndrome

Hironori Arai, Hirotaka Matsui, SungGi Chi, Yoshikazu Utsu, Shinichi Masuda, Nobuyuki Aotsuka, Yosuke Minami

Subject: Biology And Life Sciences, Life Sciences Keywords: HHMS; AML; MDS; DDX41; TP53; SAMD9; SAMD9L; germline; variant

Online: 8 November 2023 (01:43:02 CET)

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Preprint ARTICLE | doi:10.20944/preprints201607.0051.v1

Search for QPOs in the Light Curve of the Blazar OJ287: Preliminary Results from 2015/16 Observing Campaign

S. Zola, M. Valtonen, G. Bhatta, A. Goyal, B. Debski, A. Baran, J. Krzesinski, M. Siwak, S. Ciprini, A. Gopakumar, H. Jermak, K. Nilsson, D. Reichart, K. Matsumoto, K. Sadakane, K. Gazeas, M. Kidger, V. Piirola, F. Alicavus, K.S. Baliyan, A. Berdyugin, D. Boyd, M. Campas Torrent, F. Campos, J. Carrillo Gomez, D.B. Caton, V. Chavushyan, J. Dalessio, D. Dimitrov, M. Drozdz, A. Erdem, A. Escartin Perez, V. Fallah Ramazani, A.V. Filippenko, F. Garcia, F. Gomez Pinilla, M. Gopinathan, J.B. Haislip, J. Harmanen, G. Hurst, K.M. Ivarsen, M. Jelinek, A. Joshi, M. Kagitani, N. Kaur, N. Karaman, W.C. Keel, A.P. LaCluyze, B.C. Lee, E. Lindfors, J. Lozano De Haro, J.P. Moore, R. Naves Nogues, A.W. Neely, R.H. Nelson, W. Ogloza, S. Okano, J.C. Pandey, M. Perri, P. Pihajoki, G. Poyner, J. Provencal, T. Pursimo, A. Raj, R. Reinthal, S. Sadegi, T. Sakanoi, J.-L. Salto Gonzales, T. Schweyer, F.C. Soldan Alfaro, E. Sonbas, I. Steele, J.T. Stocke, J. Strobl, L.O. Takalo, T. Tomov, L. Tremosa Espasa, J.R. Valdes, J. Valero Perez, F. Verrecchia, J.R. Webb, M. Yoneda, M. Zejmo, W. Zheng, J. Telting, J. Saario, T. Reynolds, A. Kvammen, E. Gafton, R. Karjalainen, P. Blay

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: galaxies: active; BL Lacertae objects: individual (OJ 287); super massive black holes

Online: 18 July 2016 (10:46:26 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201802.0014.v2

Photovoltaic Cell and Module I-V Characteristic Approximation Using Bézier Curves

Roland Szabo, Aurel Gontean

Subject: Engineering, Energy And Fuel Technology Keywords: PV cell; I-V characteristic; model; simulation; interpolation; Bézier curve; control points; least squares fitting method

Online: 23 March 2018 (16:15:01 CET)

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Preprint ARTICLE | doi:10.20944/preprints202306.2153.v1

Characteristic Length for Pinning Force Density in Nb3Sn

Evgeny F. Talantsev, Evgeniya G. Valova-Zaharevskaya, Irina L. Deryagina, Elena N. Popova

Subject: Physical Sciences, Condensed Matter Physics Keywords: pinning force density in superconductors; superconducting critical current; scaling laws in superconductivity

Online: 29 June 2023 (13:28:09 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202406.1798.v1

Proposal of a New Procedure for Assessing the Performance of the Self-Healing Polymer-Modified Asphalt Binders with an Integral Vision of the Damage Characteristic Curves

Songtao Lv, Dongdong Ge, Shihao Cao, Dingyuan Liu, Wenhui Zhang, Cheng-Hui Li, Milkos Borges Cabrera

Subject: Engineering, Civil Engineering Keywords: bitumen fatigue performance; failure definition; self-healing polymers; self-restoration performance; self-healing behaviour

Online: 26 June 2024 (06:56:57 CEST)

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Working Paper ARTICLE

Flattening COVID-19 Curve in Egypt: An Epidemiological Modelling

Ali Hasab

Subject: Medicine And Pharmacology, Epidemiology And Infectious Diseases Keywords: COVID-19; Egypt; Epidemic SIR Model; Pandemic; Flattening the curve

Online: 14 May 2020 (15:12:16 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201805.0326.v1

Curve Path Detection in Autonomous Vehicle using Deep Learning

Balasriram Kodi, Manimozhi M

Subject: Engineering, Automotive Engineering Keywords: autonomous vehicles, lane detection, curve path detection, convolutional neural networks, deep learning

Online: 24 May 2018 (04:56:42 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201801.0061.v1

Curve Number Applications for Restoration the Zarqa River Basin

Maisa'a W. Shammout, Muhammad Shatanawi, Jim Nelson

Subject: Environmental And Earth Sciences, Environmental Science Keywords: water scarcity; watershed restoration; land use distribution; soil type; curve number; Zarqa River’s flow simulation; end-users

Online: 8 January 2018 (09:59:13 CET)

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Preprint ARTICLE | doi:10.20944/preprints202307.0773.v1

A New Definition of Dual Spline Curves for Curve Modeling and Geometry Defeaturing

Baotao Chi, Shengmin Bai, Qianjian Guo, Yaoming Zhang, Wei Yuan, Can Li

Subject: Computer Science And Mathematics, Geometry And Topology Keywords: Dual spline curves; Adaptive curve refinement; Curve modeling; Geometry defeaturing

Online: 12 July 2023 (05:50:49 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202112.0487.v1

Modelling Buildings in CityGML LOD1: Building Parts, Terrain Intersection Curve and Address Features

Evgeny Shirinyan, Dessislava Petrova-Antonova

Subject: Engineering, Architecture, Building And Construction Keywords: 3D City Model; CityGML 2.0; Spatial Data Integration

Online: 30 December 2021 (12:51:35 CET)

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Preprint ARTICLE | doi:10.20944/preprints202408.0767.v1

Isometric Force-Time Curve Assessment: Accuracy, Precision and Repeatability of a Mobile Application and Portable and Lightweight Device—The DINABANG^®

Dario Santos, Alfredo Bravo-Sánchez, Leonardo Alexandre Peyré-Tartaruga, Franco Simini, Rodrigo Zacca

Subject: Public Health And Healthcare, Physical Therapy, Sports Therapy And Rehabilitation Keywords: exercise; health; physical fitness; rehabilitation; physical therapy; strength assessment; exercise physiology; sports biomechanics; digital technology

Online: 12 August 2024 (09:58:55 CEST)

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Preprint COMMUNICATION | doi:10.20944/preprints202210.0466.v1

R-Curve Behavior of Polyhedral Oligomeric Silsesquioxane (POSS)–Epoxy Nanocomposites

Kunal Mishra, Raman Singh

Subject: Chemistry And Materials Science, Polymers And Plastics Keywords: Polymer matrix composites; POSS; Fracture mechanics; J-integral; Stress intensity factor; Scanning electron microscopy

Online: 31 October 2022 (06:19:34 CET)

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Preprint ARTICLE | doi:10.20944/preprints202406.2013.v1

A decrease in ciliary motility induced by a CO2/HCO3--free solution characteristic of ciliated human nasal epithelial cells: acceleration of HCO3- transport by carbonic anhydrase IV

Shota Okamoto, Makoto Yasuda, Kotoku Kawaguchi, Kasane Yasuoka, Yumi Kikukawa, Shinji Asano, Taisei Tsujii, Sana Inoue, Kikuko Amagase, Taka-aki Inui, Shigeru Hirano, Toshio Inui, Yoshinori Marunaka, Takashi Nakahari

Subject: Medicine And Pharmacology, Otolaryngology Keywords: nasal cilia; intracellular pH; NH4+ pulse; NBC; bicarbonate transport metabolon; airway; ALI; ciliary motility; ciliary waveform; CBF

Online: 28 June 2024 (06:07:12 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202405.1117.v1

Correlation between the Characteristic Flavour and Microbial Community of Xuanwei Ham after Ripening

Guipeng Li, Simin Li, Yiling Wen, Jing Yang, Ping Wang, Huaiyao Wang, Yawen Cui, Wenliang Wu, Liang Li, Zhendong Liu

Subject: Biology And Life Sciences, Agricultural Science And Agronomy Keywords: Xuanwei ham; flavour; microbial communities

Online: 16 May 2024 (14:00:18 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202303.0133.v1

Characteristic Analysis and Structural Design of Photonic Crystal Fibers for Gas Sensing Applications

Longchao Zheng, YONG LIU

Subject: Physical Sciences, Optics And Photonics Keywords: Photonic crystal fiber; Gas; Sensitivity; Confinement loss; Characteristic

Online: 7 March 2023 (09:43:50 CET)

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Preprint ARTICLE | doi:10.20944/preprints202103.0613.v1

Measurement of Continuous Cooling Transformation Curve and High Temperature Mechanical Properties for 12Mn Steel

Sheng tao Qiu, Jun Wei

Subject: Engineering, Automotive Engineering Keywords: 12Mn steel; round billet; thermal mechanical simulation; CCT curve; diatometer method; JmatPro; tensile strength; the reduction of area; stress-strain curve; Thermal-cal software

Online: 25 March 2021 (11:44:06 CET)

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Preprint ARTICLE | doi:10.20944/preprints202401.0618.v1

Enhancing Privacy in the Internet of Vehicles via Hyperelliptic Curve Cryptography

George Routis, Panagiotis Dagas, Ioanna Roussaki

Subject: Computer Science And Mathematics, Security Systems Keywords: Internet of Things (IoT); Internet of Vehicles (IoV); Vehicular Ad-hoc Networks (VANETs); vehicle privacy; digital certificates; digital signatures; ECC; HECC; energy consumption; message size; Arduino; Zigbee

Online: 8 January 2024 (10:52:59 CET)

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Preprint ARTICLE | doi:10.20944/preprints202010.0609.v1

To Bend the Curve of Terrestrial Biodiversity, Place Agency Centre Stage

Claude Garcia, Sini Savilaakso, Marieke Sassen, Natasha Stoudmann, René W. Verburg, Fabien Quétier, Miguel B. Araújo, Jean-François Bastin, Laurence Boutinot, Hélène Dessard, Anne Dray, Philip Fernbach, Scott Francisco, Jaboury Ghazoul, Laurène Feintrenie, Babak Naimi, Johan Oszwald, Stephan A. Pietsch, Brian E. Robinson, Plinio Sist, Steven A. Sloman, Terry Sunderland, Cédric Vermeulen, Lucienne Wilmé, Sarah J. Wilson, Patrick O. Waeber

Subject: Environmental And Earth Sciences, Atmospheric Science And Meteorology Keywords: agency; transition; cognition; land-use change; games; democracy

Online: 29 October 2020 (11:24:42 CET)

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Preprint BRIEF REPORT | doi:10.20944/preprints202004.0353.v1

Can Innate Immunity Flatten the Curve? Covid-19 – A Case Study

Sangam Banerjee

Subject: Biology And Life Sciences, Immunology And Microbiology Keywords: COVID-19; innate immunity

Online: 19 April 2020 (16:54:43 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202310.0822.v1

Microwave Irradiation: Effects of Particle Size Distribution, Rheological and Fluorescent Characteristic of Red Wine

Jiang-Feng Yuan, Hui-Min Qin, Zhuo-Yao Chen, Yu-Ting Lai, Lin-Yue Tang, Xiao-Wen Yang

Subject: Engineering, Other Keywords: microwave irradiation; red wine; particle size distribution; rheological characteristic; fluorescence property

Online: 12 October 2023 (12:05:49 CEST)

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Preprint TECHNICAL NOTE | doi:10.20944/preprints201904.0282.v1

Mineralogy Characteristic Study and Exploration on the Valuable Metals Enrichment of Coal Fly Ash

Tao Chen, Bo Yan, Li-li Li, Zi-Ang Yan, Jun Wang, xianming Xiao

Subject: Environmental And Earth Sciences, Environmental Science Keywords: fly ash, process mineralogy, minerals, rare and precious metals, separation and enrichment

Online: 25 April 2019 (11:24:23 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201710.0187.v1

Image Features Based on Characteristic Curves and Local Binary Patterns for Automated HER2 Scoring

Ramakrishnan Mukundan

Subject: Computer Science And Mathematics, Analysis Keywords: medical image classification; local binary patterns; characteristic curves; whole slide image pro-cessing; automated HER2 scoring

Online: 31 October 2017 (03:10:22 CET)

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Preprint REVIEW | doi:10.20944/preprints202405.1442.v1

Revalidation of DNA Fragmentation Analyses for Human Sperm—Measurement Principles, Comparative Standards, Calibration Curve, Required Sensitivity, and Eligibility Criteria for Test Sperm—A Step-by-Step Approach to Cohort Studies with Multivariable Analyses

Satoru Kaneko, Yuki Okada

Subject: Biology And Life Sciences, Biology And Biotechnology Keywords: DNA fragmentation; single-cell pulsed-field gel electrophoresis; human sperm; sperm chromatin structure assay; sperm chromatin dispersion test; comet assay; quantitative analysis

Online: 23 May 2024 (08:19:18 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202312.1473.v1

Influence of amitraz-based products characteristic to control varroa mite population

Gabrielle ALMECIJA, Benjamin POIROT, Paulo MIELGO, Max WATKINS, Christelle SUPPO

Subject: Biology And Life Sciences, Insect Science Keywords: Apis mellifera, beekeeping, Apivar, Supatraz, Modeling, Resistance, Efficacy, Treatment

Online: 19 December 2023 (15:28:42 CET)

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Preprint ARTICLE | doi:10.20944/preprints202311.1980.v1

Analysis of Characteristic Microorganisms Inside Household Washing Machines From Shanghai, China

Tong Chen, Shu Zhang, Juan Yang, Youran Li, Eiichi Kogure, Ye Zhu, Weiqi Xiong, Enhui Chen, Guiyang Shi

Subject: Public Health And Healthcare, Public, Environmental And Occupational Health Keywords: household washing machines; microbial contamination; metagenomics; pathogenic bacteria; biofilm

Online: 1 December 2023 (03:11:19 CET)

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Preprint ARTICLE | doi:10.20944/preprints201910.0301.v1

On the Characteristic Properties of Geodesic Sub-$ (\alpha,b,s )$-Preinvex

Wedad Saleh, Adem Kilicman

Subject: Computer Science And Mathematics, Geometry And Topology Keywords: E-convex sets; preinvex; E-convex functions; geodesic; sub-preinvex; Riemannian manifolds; Hadamard manifolds.

Online: 27 October 2019 (10:41:01 CET)

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Preprint ARTICLE | doi:10.20944/preprints202304.1137.v1

V2G Strategies to Flatten the Daily Load Curve in Seoul, South Korea

Sangbong Choi, Changsoo Kim, Backsub Sung

Subject: Engineering, Electrical And Electronic Engineering Keywords: V2G strategie; daily load curve; charging location; discharging location; time-of-use (TOU); system marginal price (SMP)

Online: 28 April 2023 (07:25:40 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202202.0157.v1

Identify the Mathematical Models Generated by the Table Curve 3 D Program

Emilian Mosnegutu, Mirela Panainte-Lehadus, Valentin Nedeff, Claudia Tomozei, Narcis Barsan, Dana Chitimus, Marcin Jasinski

Subject: Computer Science And Mathematics, Mathematics Keywords: mathematical models; Table Curve 3D; correlation coefficient

Online: 11 February 2022 (08:35:16 CET)

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Working Paper REVIEW

Bending the Curve of Global Freshwater Biodiversity Loss – An Emergency Recovery Plan

David Tickner, Jeff Opperman, Robin Abell, Mike Acreman, Angela H. Arthington, Stuart E. Bunn, Steven J. Cooke, James Dalton, Will Darwall, Gavin Edwards, Ian Harrison, Kathy Hughes, Tim Jones, David Leclère, Abigail J. Lynch, Philip Leonard, Michael E. McClain, Dean Muruven, Julian D. Olden, Steve Ormerod, Rebecca E. Tharme, Michele Thieme, Klement Tockner, Mark Wright, Lucy Young

Subject: Environmental And Earth Sciences, Ecology Keywords: River restoration; wetlands; freshwater conservation; Sustainable Development Goals; Convention on Biological Diversity

Online: 29 October 2019 (11:13:47 CET)

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Preprint CASE REPORT | doi:10.20944/preprints202208.0375.v1

Characteristic of Uterine Lipoleiomyoma and Hemangioma by Algorithm of Candidate Biomarkers for Uterine Mesenchymal Tumor

Shoko Nishikawa, Takuma Hayashi, Yasuaki Amano, Nobuo Yaegashi, kaoru Abiko, Ikuo Konishi

Subject: Medicine And Pharmacology, Obstetrics And Gynaecology Keywords: lipoleiomyoma; hemangioma; bleeding; uterine leiomyoma; uterine leiomyosarcoma

Online: 22 August 2022 (05:24:00 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202203.0382.v1

The Characteristic of CFRP Laminates Related to Water Absorption Subjected to Tensile, Bending, and Compression

Sudarisman Sudarisman, Alfian Hidayat, Haniel Haniel, Muhammad Tiopan, Rela Adi Himarosa, Muhammad Akhsin Muflikhun

Subject: Engineering, Mechanical Engineering Keywords: CFRP; vacuum infusion; water absorption; tensile test; bending test; compressive test

Online: 29 March 2022 (12:22:53 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202307.1405.v1

Quantitating Wastewater Characteristic Parameters Using Neural Network Regression Modeling on Spectral Reflectance

Dhan Lord B. Fortela, Armani Travis, Ashley P. Mikolajczyk, Wayne Sharp, Emmanuel Revellame, William Holmes, Rafael Hernandez, Mark Zappi

Subject: Engineering, Chemical Engineering Keywords: neural network regression; wastewater quality; spectral reflectance

Online: 20 July 2023 (10:44:00 CEST)

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Preprint COMMUNICATION | doi:10.20944/preprints202305.1924.v1

Microstructural Characteristic of NiTi Coating on Graphite Substrate by Plasma Spraying Process

Sneha Samal, Jakub Zeman, Jaromír Kopeček, Petr Sittner

Subject: Engineering, Other Keywords: NiTi coating; Graphite substrate; Microstructural; Plasma spraying

Online: 26 May 2023 (10:52:40 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202308.2137.v1

Hardware Implementations of Elliptic Curve Cryptography Using Shift-Sub Based Modular Multiplication Algorithms

Yamin Li

Subject: Computer Science And Mathematics, Security Systems Keywords: elliptic curve cryptography; affine, projective, and Jacobian coordinates; modular multiplication; hardware security module; Verilog HDL; FPGA; cost/performance evaluation

Online: 31 August 2023 (09:35:06 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202211.0192.v1

Evaluation of the Daily Load Curve by Taking V2G of PEVs into Consideration

Sangbong Choi, Chang soo Kim, Back sub Sung

Subject: Engineering, Electrical And Electronic Engineering Keywords: Charging location; Discharging location; Time of Use(TOU); System Marginal Price(SMP)

Online: 10 November 2022 (05:59:59 CET)

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Preprint ARTICLE | doi:10.20944/preprints202407.0886.v1

A New Test Method of “Nuclear Magnetic Resonance + High-Speed Centrifugation” for Gas-Water Relative Permeability Curve of Low-Permeability and Tight Sandstone

Fenglai Yang, Huaxun Liu, Shusheng Gao, Sijie He, Feifei Fang, Cuili Wang, Liyou Ye, Kun Zhou, Xuejun Yang, Weiguo An

Subject: Physical Sciences, Fluids And Plasmas Physics Keywords: Low permeability and tight sandstone; Nuclear magnetic resonance (NMR); High speed centrifugation; Micro pore structure; Gas-water relative permeability curve

Online: 11 July 2024 (08:28:50 CEST)

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Gas-water relative permeability curve is the foundation of gas reservoir dynamic analysis and numerical simulation. It is generally obtained through gas displacing water experiment. Referring to the existing national standards, gas-water relative permeability test is carried out for low-permeability and tight sandstone. The flow is discontinuous and the curve smoothness is poor, which affects the application of gas-water relative permeability curve. Based on the comparative analysis of a large number of mercury injection and NMR experimental results of low-permeability and tight sandstone, a method to characterize the throat radius distribution of low-permeability tight sandstone based on NMR T2 spectrum is explored. Combined with high-speed centrifugal experiment, the calculation formulas of core water saturation, phase relative permeability of gas-water under different centrifugal force are established. A new method of "nuclear magnetic resonance + high-speed centrifugation" for gas-water relative permeability curve test of low-permeability and tight sandstone is formed, and the test is carried out on Sulige low-permeability tight sandstone core. The results show that: (1) The shape of cumulative distribution curve of throat radius by mercury injection method is basically consistent with that of T2 relaxation time by NMR, and there is a good corresponding relationship between them. (2) The centrifugation process is similar to the gas displacing water process. With the decrease of water saturation, water centrifugation in rock core becomes more and more difficult until it become irreducible. (3) The test process of the new method is unified and standard and up to 6 cores can be tested at the same time. The calculation results of water saturation and relative permeability curve are reliable and the integral curve is smooth, which greatly improves the test efficiency of gas-water relative permeability curve in low-permeability and tight sandstone. The new method can be widely used to study the gas-water two-phase seepage law in low-permeability and tight sandstone gas reservoir.

Preprint ARTICLE | doi:10.20944/preprints202402.0584.v2

Characteristic Metabolites and Antioxidant Activities of Essential Oils from Phlomoides rotata (Benth. ex Hook. f.) Mathiesen

Zheng Pan, Chen Xie, Jie Luo, Xiao Tong Yan, Yong Mei Su, Jian Wang, Nasir Mehmood Khan, Shujaat Ahmad

Subject: Medicine And Pharmacology, Pharmacy Keywords: Phlomoides rotata ; (Benth. ex Hook. f.) Mathiesen (Lamiophlomis rotata ; (Benth.) Kudô; ); essential oils; ; characteristic metabolites; ; metabolomics; fatty acids; apocarotenoids ; (norisoprenoids); biosynthesis; antioxidant activities; pro-oxidant activities.

Online: 3 June 2024 (11:59:55 CEST)

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Limited research has been conducted on the metabolites present in the essential oils (EOs) of Phlomoides rotata (Benth. ex Hook. f.) Mathiesen (PR, syn. Lamiophlomis rotata (Benth.) Kudô), and their potential pharmacological activities, such as antioxidant properties, are often overlooked. We conducted a metabolomics-based screening to identify the characteristic metabolites (CMs) in the EOs extracted from PR. Meanwhile, we evaluated their in vitro antioxidant activities (AOAs). The EOs obtained through hydro-distillation are characterized by a light yellow color and a fresh, elegant fragrance. Cryoprecipitation was used to separate the crystals (Crs) from the EOs, resulting in the crystal-free EOs (CFs). A total of 121 components are identified and quantified in the EOs, Crs, and CFs. Among them, 84 were reported for the first time from such EOs. The major compounds include long-chain fatty acids (LCFAs) and their esters, such as palmitic acid (PA), myristic acid (MA), linoleic acid (LA), oleic acid (OA), stearic acid, and methyl palmitate (MP). Furthermore, 11 kinds of apocarotenoids (also called norisoprenoids) were first systematically investigated. Among them, eight C13-norisoprenoids, with trans-β-damascenone (DN) being particularly notable for its flavor, were identified. A sum of 11 CMs are screened , including PA, MA, LA, OA, MP, hexahydrofarnesyl acetone, phytol (PT), DN, stearic acid, linalool, and hexanal. These CMs are biosynthesized through FAs and 2-C-Methyl-D-erythritol 4-phosphate/1-Deoxy-D-xylulose 5-phosphate pathways. The in vitro AOAs of EOs, Crs, CFs, and seven selected CMs (PA, MA, LA, OA, MP, PT, and DN) were evaluated. Generally, PA and MA exhibited pro-oxidant activities (POAs) or weak AOAs. LA and OA demonstrated POAs or weak AOAs at lower concentrations, but at higher concentrations, they displayed medium to strong AOAs. Importantly, the CFs typically exhibited stronger AOAs compared to the corresponding EOs and Crs, potentially due to variations in their PA content. Overall, this study provides valuable insights into the potential utilization of EOs from PR.

Preprint ARTICLE | doi:10.20944/preprints202111.0159.v1

Arabidopsis PII Proteins Form Characteristic Foci in Chloroplasts Indicating Novel Properties in Protein Interaction and Degradation

Natalie Krieger, Kai-Florian Pastryk, Karl Forchhammer, Üner Kolukisaoglu

Subject: Biology And Life Sciences, Plant Sciences Keywords: plant PII protein; protein-protein interaction; PII foci; BiFC; FRET/FLIM; plastidic protein degradation; cpUPR

Online: 8 November 2021 (15:30:44 CET)

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Preprint ARTICLE | doi:10.20944/preprints202404.1078.v1

Solar Energetic Particles Propagation Under 3D Corotating Interaction Regions With Different Characteristic Parameters

Yuji Zhu, Fang Shen

Subject: Environmental And Earth Sciences, Space And Planetary Science Keywords: solar energetic particles (SEP); corotating interaction regions (CIR); magnetohydrody- 19 namic (MHD)

Online: 16 April 2024 (17:28:40 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202312.1261.v1

Effect of Curvature Radius on Single Droplet Dynamic Characteristic within Concave-Wall Jet

Bin Gong, Aibo Jian, Jing Zhang, Guang Yang, Yifeng Liu

Subject: Engineering, Chemical Engineering Keywords: concave-wall jet; droplet; heterogeneous; interfacial energy; deformation mechanism

Online: 18 December 2023 (12:36:59 CET)

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Preprint COMMUNICATION | doi:10.20944/preprints202211.0440.v1

Exome Sequencing reveals characteristic KMT2C mutations in the Indian Phenotype of Cervical Cancer

Santosh Kumari Duppala, Bhumandeep Kour, Nidhi Shukla, Maruti A Dhakane, Ashwani Kumar Mishra, Raghunadharao Digumarti, Smita C Pawar, Prashanth N Suravajhala, Sugunakar Vuree

Subject: Biology And Life Sciences, Biochemistry And Molecular Biology Keywords: Cervical cancer; Functional genomics; Bioinformatics; Next Generation Sequencing; Exome

Online: 23 November 2022 (07:42:19 CET)

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Preprint CASE REPORT | doi:10.20944/preprints202203.0091.v1

Characteristic of Uterine Rhabdomyosarcoma by Algorithm of Potential Biomarkers for Uterine Mesenchymal Tumor

Saya Tamura, Takuma Hayashi, Tomoyuki Ichimura, Nobuo Yaegashi, Kaoru Abiko, Ikuo Konishi

Subject: Medicine And Pharmacology, Oncology And Oncogenics Keywords: rhabdomyosarcoma; leiomyoma; leiomyosarcoma; mesenchymal tumor

Online: 7 March 2022 (08:50:58 CET)

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Preprint ARTICLE | doi:10.20944/preprints202108.0431.v1

Characteristic Length Scale during the Time Evolution of a Turbulent Bose-Einstein Condensate

Lucas Madeira, Arnol D. García-Orozco, Michelle A. Moreno-Armijos, Francisco Ednilson Alves dos Santos, Vanderlei S. Bagnato

Subject: Physical Sciences, Atomic And Molecular Physics Keywords: quantum turbulence; Bose-Einstein condensate; out-of-equilibrium

Online: 23 August 2021 (12:13:25 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202012.0202.v1

Characteristic of the Regional Rainy Season Onset over Vietnam: Tailoring to Agricultural Application

Nachiketa Acharya, Elva Bennett

Subject: Environmental And Earth Sciences, Atmospheric Science And Meteorology Keywords: zonal rainy season; agronomic onset definition; trend detection; ENSO- teleconnection

Online: 8 December 2020 (14:42:10 CET)

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Owing to its unique position within multiple monsoon regimes, latitudinal extent, and complex topography, Vietnam is divided into seven agroclimatic zones, each with distinct rainy season characteristics. Variation in the dominant rainfall system across zones affects the rainfall climatology, the primary water resource for regional crops. This study explores the creation of an agronomic rainy season onset based on high-resolution rainfall data for each agroclimatic zone for applications in an agricultural context. Onset information has huge practical importance for both agriculture and the economy. The spatiotemporal characteristics of zonal onset date are analyzed using integrated approaches of spatial and interannual variability, temporal changes, and estimation of predictability using teleconnection with Niño 3.4 sea surface temperature anomalies (SSTA) for 1980 to 2010. Results suggest that northern and southern zones experience regional onset dates in May, while the central zones experience rainy season onset in late August. The regional variability of rainy season onset is lower in a single dominant monsoon regime (northern and southern zones) and higher in latitudinally extended zones on the border of monsoon regimes (central zones). The interannual variation in rainy season onset date is found to be approximately 2 weeks across all agroclimatic zones. The significant negative trend in rainy season onset date is found for Central Coast and South Central Coast zones, suggesting that the onset date shifted earlier for the entire period. In the decadal scale, the zonal mean onset date shifted later in the Northwest and earlier in the Central Highlands. Out of the seven climate zones, a significant positive correlation is only noticed in the Central Highlands and South zones between zonal mean onset date and Niño 3.4 SSTA for Dec-Jan-Feb, suggesting the potential of seasonal scale predictability of rainy season onset date with respect to preceding El Niño-Southern Oscillation (ENSO) events.

Preprint ARTICLE | doi:10.20944/preprints202311.1392.v1

Deep-Learning-Based Hydrostatic Curve Modeling for Stability Calculation of Chine-Type Small Ships

Dongkeun Lee, Chaeog Lim, Sang-jin Oh, Minjoon Kim, Jun Soo Park, Sung-chul Shin

Subject: Engineering, Marine Engineering Keywords: hull form; deep learning model; hydrostatic curve modelling; small ships

Online: 22 November 2023 (06:31:44 CET)

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Preprint ARTICLE | doi:10.20944/preprints202308.2126.v1

Echocardiographic-Fluoroscopic Fusion Imaging Improves Interventionalists´ Learning Curve for Percutaneous Left Atrial Appendage Closure

Dominika Anna Kanschik, Houtan Heidari, Kathrin Klein, Amin Polzin, Verena Veulemans, Jürgen Leick, Malte Kelm, Christian Jung, Tobias Zeus, Shazia Samreen Afzal

Subject: Medicine And Pharmacology, Internal Medicine Keywords: structural heart disease; left atrial appendage closure; fusion imaging; learning curve

Online: 31 August 2023 (10:36:53 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202305.1821.v1

Point-of-Care Ultrasound (POCUS) Assessment, Including Learning Curve: Developing a Dynamic Simulation Model

Sandra Patricia Usaquén-Perilla, Laura Valentina Bocanegra-Villegas, José Isidro García-Melo

Subject: Engineering, Bioengineering Keywords: System dynamics; Health Technology Assessment (HTA); Point-of-care ultrasound (POCUS); dengue

Online: 26 May 2023 (03:06:34 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202310.1959.v2

Characteristic Volatile Compounds of Phlomoides rotata (Benth. ex Hook. f.) Mathiesen and Their Potential Anti-oxidant Activities

Zheng Pan, Chen Xie, Xiao Tong Yan, Yong Mei Su, Anwar Ul Haq, Jian Wang

Subject: Medicine And Pharmacology, Medicine And Pharmacology Keywords: Phlomoides rotata (Benth. ex Hook. f.) Mathiesen (Lamiophlomis rotata (Benth.) Kudô); essential oils; chemical markers; fatty acids; palmitic acid; C13-norisoprenoids; trans-β-damascenone; anti-oxidant activities; pro-oxidant activities

Online: 31 October 2023 (09:01:09 CET)

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Preprint ARTICLE | doi:10.20944/preprints202308.0339.v1

Liquid Water Transport Characteristic and Droplet Dynamics of Proton Exchange Membrane Fuel Cells With 3D Wave Channel

Li Zijun, Jianguo Wang, Shubo Wang, Weiwei Li, Xiaofeng Xie

Subject: Engineering, Energy And Fuel Technology Keywords: PEMFC; Two-phase flow; Droplet dynamics; Liquid Water removal; 3D flow field

Online: 3 August 2023 (10:46:45 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202307.2116.v1

Design of a Dual-Band WiFi Antenna Using the Theory of Characteristic Modes and Nested Chinese Characters

Zhonggen Wang, Mingqing Wang, Wenyan Nie

Subject: Engineering, Electrical And Electronic Engineering Keywords: characteristic mode; Chinese characters; WiFi; high isolation

Online: 31 July 2023 (11:42:23 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202301.0060.v1

The Environmental Kuznets Curve hypothesis for Colombia: impact of economic development on greenhouse gas emissions and ecological footprint

Jorge A Acevedo, Carlos Felipe Valencia, Carlos Darío Valencia

Subject: Business, Economics And Management, Econometrics And Statistics Keywords: carbon dioxide emissions; Ecological footprint; Economic growth; EKC hypothesis; Environmental degradation; ARDL; Methane emissions

Online: 4 January 2023 (03:44:17 CET)

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Preprint ARTICLE | doi:10.20944/preprints201708.0070.v1

Stretch-Shortening Cycle in Countermovement Jump: Exclusive Review of Force-Time Curve Variables in Eccentric and Concentric Phases

Mahdi Cheraghi, Javad Sarvestan, Masoud Sebyani, Elham Shirzad

Subject: Public Health And Healthcare, Physical Therapy, Sports Therapy And Rehabilitation Keywords: stretch-shortening cycle; countermovement jump; force-time curve variables; eccentric; concentric; volleyball

Online: 21 August 2017 (09:08:50 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202312.2025.v1

(1E,3E)-1,4-dinitro-1,3-butadiene – synthesis, spectral characteristic and computational study based on MEDT, ADME and PASS simulation

Mikołaj Sadowski, Beata Synkiewicz-Musialska, Karolina Kula

Subject: Chemistry And Materials Science, Organic Chemistry Keywords: nitrodiene; synthesis; spectral characteristics; DFT reactivity indices; ADME; PASS

Online: 26 December 2023 (16:26:14 CET)

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Preprint ARTICLE | doi:10.20944/preprints202403.0820.v1

Establishing the Characteristic Compressive Strength Parallel to Fiber of Four Local Philippine Bamboo Species

Christine Abegail Tomagan Panti, Christy Sapois Cañete, Althea Roylo Navarra, Kerby Dianela Rubinas, Lessandro Estelito Ortega Garciano, Luis Felipe López

Subject: Engineering, Architecture, Building And Construction Keywords: Bambusa vulgaris; Dendrocalamus asper; Bambusa blumeana; Guadua angustifolia Kunth; characteristic compressive strength; ISO 22157-1; ISO 12122-1

Online: 14 March 2024 (08:08:21 CET)

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Preprint ARTICLE | doi:10.20944/preprints202311.0203.v1

Frequency Domain Estimation Method of The Characteristic Period of The P Wave of Earthquakes

Codrin Donciu, Elena Serea, Marinel Costel Temneanu

Subject: Engineering, Electrical And Electronic Engineering Keywords: earthquake; P wave; characteristic period; frequency domain.

Online: 3 November 2023 (06:44:46 CET)

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Preprint ARTICLE | doi:10.20944/preprints202309.1263.v1

Deforestation Characteristic during a Period 2006 - 2020 over Tropical Forest in Central Kalimantan, Indonesia

Hendrik Segah, Afentina Afentina, Fatkhurohman Fatkhurohman, Yusuf Aguswan, Naru Takayama

Subject: Environmental And Earth Sciences, Environmental Science Keywords: Deforestation; Forest Fires; Central Kalimantan; Land Use and Land Cover Change

Online: 19 September 2023 (08:32:11 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202011.0068.v1

The Construction Model of Inculcating Principal Humanistic Values in Forming a Characteristic School Environment

Yulius Rustan Effendi, Ibrahim bafadal, I Nyoman Sudana Degeng, Imron Arifin

Subject: Arts And Humanities, Humanities Keywords: humanistic values; principal's leadership; a character school environment

Online: 2 November 2020 (19:21:43 CET)

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Preprint ARTICLE | doi:10.20944/preprints202402.0045.v1

Effects of 2D Ultrasonic Vibration on Plasticity and Fracture Characteristic of 1060 Aluminium Alloy Sheet for Incremental Forming

Yuan Lv, Yifan Wang, Yan Wang, Xixiang Pan, Cong Yi, Mengen Dong

Subject: Engineering, Industrial And Manufacturing Engineering Keywords: Aluminium Alloy; Incremental Forming; Ultrasonic Vibration; Plasticity; Micro-morphology; Residual Stress

Online: 1 February 2024 (11:37:28 CET)

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Preprint ARTICLE | doi:10.20944/preprints202203.0230.v1

Optimised Design of An Arterial Network Model Reproduces Characteristic Central and Peripheral Hemodynamic Waveform Features in Young Adults

Avinash Kondiboyina, Hilary A. Harrington, Joseph J. Smolich, Michael M. H. Cheung, Jonathan P. Mynard

Subject: Engineering, Bioengineering Keywords: cardiovascular modelling; arterial haemodynamics; wave reflection

Online: 16 March 2022 (10:05:44 CET)

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Preprint ARTICLE | doi:10.20944/preprints202011.0344.v1

Study on Process Derivation and Characteristic Analysis for BLDC Design using Dual Rotor Method with High Torque Density

Byeong-chul Lee, Cheon-ho Song, Do-hyun Kim, Ki-chan Kim

Subject: Engineering, Automotive Engineering Keywords: BLDC; Dual Rotor; Magnetic Equivalent circuit; Operation mode; TRV

Online: 12 November 2020 (12:03:57 CET)

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Preprint ARTICLE | doi:10.20944/preprints202406.1179.v2

A Novel Security System Using a Physical Unclonable Framework With Modified Elliptic Curve Cryptography Algorithm

Aiham Altaher

Subject: Engineering, Other Keywords: PUF; Improved PUF; ECC; security; Cybersecurity; Authentication; Authorization; Encryption; Decryption

Online: 26 July 2024 (05:58:17 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201903.0147.v1

Myosin Cross-bridge Behaviour in Contracting Muscle – The T₁ Curve of Huxley & Simmons (1971) Revisited

Carlo Knupp, John M. Squire

Subject: Biology And Life Sciences, Biophysics Keywords: myosin filament stiffness; actin filament stiffness; myosin cross-bridge stiffness; muscle transients; weak binding heads; contractile mechanism; cross-bridge cycle; rigor muscle

Online: 14 March 2019 (07:01:45 CET)

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The stiffness of the myosin cross-bridges is a key factor in analysing possible scenarios to explain myosin head changes during force generation in active muscles. The seminal study of Huxley and Simmons (1971: Nature 233: 533) suggested that most of the observed half-sarcomere instantaneous compliance (=1/stiffness) resides in the myosin heads. They showed with a so-called T₁ plot that, after a very fast release, the half-sarcomere tension reduced to zero after a step size of about 60Å (later with improved experiments reduced to 40Å). However, later X-ray diffraction studies showed that myosin and actin filaments themselves stretch slightly under tension, which means that most (at least two-thirds) of the half sarcomere compliance comes from the filaments and not from cross-bridges. Here we have used a different approach, namely to model the compliances in a virtual half sarcomere structure in silico. We confirm that the T₁ curve comes almost entirely from length changes in the myosin and actin filaments, because the calculated cross-bridge stiffness (probably greater than 0.4 pN/Å) is higher than previous studies have suggested. In the light of this, we present a plausible modified scenario to describe aspects of the myosin cross-bridge cycle in active muscle. In particular, we suggest that, apart from the filament compliances, most of the cross-bridge contribution to the instantaneous T₁ response comes from weakly-bound myosin heads, not myosin heads in strongly attached states. The strongly attached heads would still contribute to the T₁ curve, but only in a very minor way, with a stiffness that we postulate could be around 0.1 pN/Å, a value which would generate a working stroke close to 100 Å from the hydrolysis of one ATP molecule. The new program can serve as a tool to calculate sarcomere elastic properties for any vertebrate striated muscle once various parameters have been determined (e.g. tension, T₁ intercept, temperature, X-ray diffraction spacing results).

Preprint ARTICLE | doi:10.20944/preprints202308.0962.v1

Investigation on the Influence of Wake Field Characteristic Structure on Downstream Target Using POD Method

Jiawei Fu, Junhui Wang, Jifei Wu, Ke Xu, Shuling Tian

Subject: Engineering, Aerospace Engineering Keywords: Proper orthogonal decomposition (POD); Domain precursor simulation method; Low-speed wake; Flow structure

Online: 14 August 2023 (09:03:44 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202307.0644.v1

Study on the Genetic Diversity of Germplasm Resources of Characteristic Medicinal Orchid Plant Habenaria dentata

Yi shan Yang, Jian min Tang, Rong Zou, Yajin Luo, Zhenhai Deng, Dongxin Li, Shengfeng Chai, Xiao Wei

Subject: Biology And Life Sciences, Other Keywords: Habenaria dentata; medicinal orchid plant; genetic diversity; ISSR; cluster analysis

Online: 11 July 2023 (03:11:34 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201808.0248.v1

An Novel Explicit Model for Photovoltaic I-V Characteristic Prediction Based on Different Splitting Spectrum

Luqing Liu, Wen Liu, Xinyu Zhang, Jan Ingenhoff

Subject: Engineering, Energy And Fuel Technology Keywords: photovoltaic panel; explicit model; spectrum splitting; I-V characteristic prediction; shape parameter

Online: 23 August 2018 (11:03:53 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202306.2129.v1

3D Dynamic Deduction and the Spatial Geometric Characteristic of Rotor System equipped with a Skew-Mounted Automatic Ball Balancer

Ming-Cheng Wang, Chih-Ling Huang

Subject: Engineering, Mechanical Engineering Keywords: automatic ball balancer; eccentric rotor; vibration suppression; three-dimensional dynamics; assembly deviation; skew-mounted; angular deviation; spatial geometric characteristic

Online: 30 June 2023 (02:38:42 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201701.0028.v9

Revealing the Phenomena of Heat and Photon Energy on Dealing Matter at Atomic Level

Mubarak Ali

Subject: Chemistry And Materials Science, Materials Science And Technology Keywords: heat energy; photon energy; fundamental forces; nanoscale phenomenon; atomic scale phenomenon; electron scale phenomenon

Online: 8 December 2017 (03:46:45 CET)

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Technology is in the way to reach in its climax but the basic understanding of science in many phenomena is still awaited even though the nature witnesses it. Scientific research reveals strong analogy between photon and electron. When an atom deals neutral state, it levitates electron of outer ring from the back surface while placing the bit-energy at front surface. Gravitation behavior of that electron starts at the centre of relaxation point by including the force of side pole where the pulling force of nearby unfilled state of that atom from the front surface results into depict forcing energy shape like Gaussian distribution symbol with both ends turned called unit photon. The inertia is being involved at each stage of changing direction of that electron by introducing the disappearances of forces of two poles against the appearances of forces of two opposite poles during rest to motion and motion to rest in the first half-cycle. The same is the case in the second half-cycle of that electron during rest to motion and motion to rest but it is under different introduction of the disappearances of forces against appearances of forces. However, at stage of levitating or gravitating period of electron, only one force is being involved at one time where the opposite force is disappeared. The uninterrupted confined inter-state electron-dynamics of atom under the availability of several bits of bit-energy results into generate forcing energy shape like a wave. Two bits of bit-energy where shape of bit for first half-cycle is like integral symbol and second half-cycle is like opposite integral symbol which are being placed along the configuring trajectory of inter-state electron-dynamics during forward-direction cycle and two bits of bit-energy shape in opposite order are being placed along the trajectory of inter-state electron-dynamics during back-direction cycle. Generating forcing energy of unit photon in each cycle is pushing to the rear side by remaining connected till the electron is not restoring the state of rest. Silicon atom is considered as a model system under neutral state. Uninterrupted confined inter-state electron-dynamics result into generate forcing energy that can travel immeasurable length and unavailability of necessitating bit-energy at any interrupted stage result into generate an overt photon. Inter-state electron-dynamics for at least two cycles generate an overt photon –a photon length twice to unit photon. Under certain interaction of unit photon, it divides equally into two bits of bit-energy instead of dividing into tits and bits of heat. The mechanism of generating photon characteristic current by the electron of neutral state atom validates that atoms are four-dimensional discs at centre of dealing no force. An isolated electron is being grounded under directed forcing energy to impinge a neutral state atom where the gained instantaneous velocity under merged energy resulting into distort atom at that point. Matter changes the role of energy and force under various sorts of interactions. Here, heat energy and photon energy explore matter at atomic and electron levels, thus, devise basis of science to describe.

Preprint ARTICLE | doi:10.20944/preprints202306.2259.v1

Functional Significance of the Curve of Spee: Electro-myographic Analysis of Young Adults-A Preliminary Study

Ilde Bertolino, Pietro Messina, Mohmed Isaqali Karobari, Anand Marya, Giuseppe Alessandro Scardina

Subject: Public Health And Healthcare, Public Health And Health Services Keywords: curve of Spee; electromyographic analysis; young adults

Online: 30 June 2023 (13:17:51 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202004.0099.v1

Analysis on Steering Performance of Active Steering Bogie According to Steering Angle Control in Curve Section

Hyunmoo Hur, Yujeong Shin, Dahoon Ahn

Subject: Engineering, Control And Systems Engineering Keywords: Active Steering bogie; Steering angle; Steering Performance; Bogie angle; Lateral force; Derailment coefficient

Online: 7 April 2020 (11:58:49 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202101.0474.v5

The Characteristic Equation of the Exceptional Jordan Algebra: Its Eigenvalues, and their relation with the Mass Ratios of Quarks and Leptons

Tejinder Pal Singh

Subject: Physical Sciences, Acoustics Keywords: Trace dynamics; Exceptional Jordan algebra; Octonions; Fine structure constant; Standard model; Mass ratios

Online: 8 October 2021 (10:58:00 CEST)

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We have recently proposed a pre-quantum, pre-space-time theory as a matrix-valued Lagrangian dynamics on an octonionic space-time. This pre-theory offers the prospect of unifying the internal symmetries of the standard model with gravity. It can also predict the values of free parameters of the standard model, because these parameters arising in the Lagrangian are related to the algebra of the octonions which define the underlying non-commutative space-time on which the dynamical degrees of freedom evolve. These free parameters are related to the algebra $J_3(\mathbb O)$ [exceptional Jordan algebra] which in turn is related to the three fermion generations. The exceptional Jordan algebra [also known as the Albert algebra] is the finite dimensional algebra of 3x3 Hermitean matrices with octonionic entries. Its automorphism group is the exceptional Lie group $F_4$. These matrices admit a cubic characteristic equation whose eigenvalues are real and depend on the invariant trace, determinant, and an inner product made from the Jordan matrix. Also, there is some evidence in the literature that the groups $F_4$ and $E_6$ could play a role in the unification of the standard model symmetries, including the Lorentz symmetry. The octonion algebra is known to correctly yield the electric charge values (0, 1/3, 2/3, 1) for standard model fermions, via the eigenvalues of a $U(1)$ number operator, identified with $U(1)_{em}$. In the present article, we use the same octonionic representation of the fermions to compute the eigenvalues of the characteristic equation of the Albert algebra, and compare the resulting eigenvalues with the known mass ratios for quarks and leptons. We find that the ratios of the eigenvalues correctly reproduce the [square root of the] known mass ratios for quarks and charged leptons. We also propose a diagrammatic representation of the standard model bosons, Higgs and three fermion generations, in terms of the octonions, exhibiting an $F_4$ and $E_6$ symmetry. In conjunction with the trace dynamics Lagrangian, the Jordan eigenvalues also provide a first principles theoretical derivation of the low energy value of the fine structure constant, yielding the value $1/137.04006$. The Karolyhazy correction to this value gives an exact match with the measured value of the constant, after assuming a specific value for the electro-weak symmetry breaking energy scale.

Preprint ARTICLE | doi:10.20944/preprints202012.0650.v1

Evaluating and Zoning Flood Susceptibility Using Curve Number (CN) Logistic and Hydrological Regression Model (Case Study of Kalateh Qanbar Drainage Basin, Nishabur)

Mahnaz Naemitabar, Mohammad Ali Zangeneh Asadi, Abolghasem Amirahmadi, Leila Goli Mokhtari

Subject: Environmental And Earth Sciences, Atmospheric Science And Meteorology Keywords: flood proneness; zoning, CN hydrologic model; curve number (CN); logistic regression

Online: 25 December 2020 (10:36:39 CET)

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Preprint ARTICLE | doi:10.20944/preprints202305.0634.v1

Multivariate Curve Resolution Methodology Applied to the ATR-FTIR Data for Adulteration Assessment of Virgin Coconut Oil

Michele De Luca, Giuseppina Ioele, Fedora Grande, Maria Antonietta Occhiuzzi, Martina Chieffallo, Antonio Garofalo, Gaetano Ragno

Subject: Chemistry And Materials Science, Analytical Chemistry Keywords: virgin coconut oil; oil adulteration; Fourier transform infrared; multivariate curve resolution; genetic algorithm; control chart.

Online: 9 May 2023 (10:22:27 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202409.0179.v1

Growth Curve Models and Clustering Techniques for the Study of New Sugarcane Hybrids: An Integrated Approach with K-Means, K-Medoids, and DBSCAN

Carlos David Carretillo Moctezuma, María Guzmán Martínez, Flaviano Godínez Jaimes, José Concepción García Preciado, Ramón Reyes Carreto, José Torrones Salgado, Edgar Pérez Arriaga

Subject: Biology And Life Sciences, Agricultural Science And Agronomy Keywords: Growth curves; clustering; varieties; sucrose percentage

Online: 3 September 2024 (10:59:49 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202311.0923.v1

Modified Characteristic Finite Element Method with Second-Order Spatial Accuracy for Solving Convection-Dominated Problem on Surfaces

Longyuan Wu, Xinlong Feng, Yinnian He

Subject: Computer Science And Mathematics, Computational Mathematics Keywords: Surface convection-reaction-diffusion equations; Explicit-implicit method; Taylor expansion; Surface finite element; Stability

Online: 15 November 2023 (03:53:46 CET)

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