Exploring national COVID-19 variability across sub-Saharan Africa by Fikresus Amahazion

“…The present study investigates country-specific factors that may help to explain differences in COVID-19 outcomes across 48 countries in SSA. # Methods A novel cross-sectional dataset, comprising a wide array of socio-demographic, political, economic, and health-related variables, is constructed through gathering data from publicly available sources. …”
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Dynamic behaviour of fluid-transporting axially functionally graded non-uniform Rayleigh pipes lying on variable two-parameter elastic foundation by J.A. Gbadeyan, P.O. Adeniran, A.S. Idowu, M.S. Dada

“…The whole span of the pipe is assumed to rest on a variable elastic two-parameter foundation. It is also assumed that the moment of inertia, cross-sectional area, material density, modulus of elasticity of the pipe and the two moduli of the foundation are all functions of the coordinate along the axis of the pipe. …”
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Predictors of lipoprotein(a) variability in clinical practice and their impact on cardiovascular risk by Hyung Joon Joo, Seung Gyu Yun, Jae Hyoung Park, Soon Jun Hong, Cheol Woong Yu, Seung Yong Shin, Eung Ju Kim

“…Approximately 19.9% of the patients exhibited high Lp(a) level variability, which was associated with lower baseline Lp(a) levels and higher follow-up Lp(a) levels, lower body mass indices, higher hemoglobin levels, elevated white blood cell and platelet counts, increased serum glucose levels, lower high-density lipoprotein cholesterol levels, and use of antihypertensive medications. …”
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Natural Fibers Density Measurement Methods: Factors Affecting Density Result in Helium Gas Pycnometry by Abebayehu Abdela, Mieraf Asfaw, Bart Buffel, Belete Sirahbizu, Frederik Desplentere

“…This study compares various standard natural fiber’s density mearusing methods and identifies determinant factors to, then, estimate the density of Enset fibers by using the optimal combination. …”
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Diabetic nephropathy nomogram construction based on optical coherence tomography angiography variables by Lobsang Tshedron, Zijing Li

“…Predictive OCTA variables were selected using the least absolute shrinkage and selection operator (LASSO) method and used to establish the model. …”
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The dynamics of life insurance demand in Bangladesh: An empirical analysis of socio-economic influences by Shaikh Masrick Hasan, Sonia Munmun, Priya Saha

“…Life insurance demand is assessed using life insurance penetration and life insurance density; GDP per capita, inflation, healthcare spending to GDP, and education spending to GDP serve as proxies for socio-economic variables. …”
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USE OF TRIANGULAR MODELS OF NON-STATIONARY PROCESSES IN MODELING VARIABILITY OF HEART RHYTHM by Olena Akhiiezer, Olha Dunaievska, Mykhailo Shyshkin, Olha Butova, Anton Rohovyi

“…Using the proposed mathematical method, we implemented the Matlab model of a heart signal generator, which allowed us to synthesize an ECG with different variability parameters in noisy conditions. …”
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Model to estimate the sampling density for establishment of yield mapping Estimativa de densidade amostral para elaboração de mapas de produtividade by Graciele R. Spezia, Eduardo G. de Souza, Lúcia H. P. Nóbrega, Miguel A. Uribe-Opazo, Marcos Milan, Claudio L. Bazzi

“…A multiple regression model was adjusted to the variable CRD, according to the following variables: spatial variability index and sampling density. …”
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Pesticide drift: comparing spraying systems under variable field climatic conditions by Camila Rebelatto Muniz, Guilherme Braga Pereira Braz, Matheus de Freitas Souza, Indiamara Marasca, Camila Jorge Bernabé Ferreira, Renata Pereira Marques, Alaerson Maia Geraldine, Lais Regina Tereza Torquato Reginaldo

“…Aerial spraying was performed using a Cessna aircraft, while terrestrial spraying was done using a self-propelled Montana Parruda sprayer. Variables assessed included Volumetric Median Diameter (VMD), droplet density (DEN), and target coverage. …”
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Study on electrical transport characteristics of aluminum-doped ZnO ceramics under high pressure by Ranjun Zhang, Lijuan Wang, Zeshan Liu, Xin Fan, Fangbiao Wang

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A method for parameterized design and rapid optimization of axial flow pumps by Kan Kan, Ye Li, Huixiang Chen, Siqi Gao, Jinbo Chen

“…A 9-factor 9-level orthogonal table was used to optimize nine variables, including the cascade density, in the first stage. …”
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Correlations between Visual Performance and Chorioretinal Variables after Vitrectomy for the Idiopathic Macular Hole by Minfeng Chen, Chenchen Zheng, Yu Liu, Feng Chen, Dan Xu, Fan Lu

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Computing the Moments of Order Statistics from Independent Nonidentically Distributed Exponentiated Frechet Variables by A. A. Jamjoom, Z. A. Al-Saiary

“…Two methods of integration were used to find the moments. …”
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Seismic fragility curves based on the probability density evolution method by Thuat-Cong Dang, Thien-Phu Le, Pascal Ray

“…In this paper, we propose a new technique for construction of seismic fragility curves by numerical simulation using the Probability Density Evolution Method (PDEM). From the joint probability density function between structural response and random variables of a system and/or excitations, seismic fragility curves can be derived without the log-normal assumption. …”
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Estimation of the dimensional variability in the properties of soils in the basement of the atomic power station (APS) territory by A. S. Gousseltsev, V. V. Pendin, G. P. Barulin, D. N. Gorobtsov

“…A method of the estimating the variability of the physical and mechanical characteristics of soils has been considered. …”
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Numerical Study on Coupled Combustion of PMMA Counter-Directional Flame Spread at Variable Slope by Qiong Liu, Kehong Li, Chao Yuan, Ning Bian, Zhi Li, Weilin Xu, Jinrong Chen

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Research on the Variable Factors Influencing the Vitality of Commercial Districts Based on the SOR Theory Model by Qinghua Zhou, Yubo Wang

“…Based on the SOR (stimulus–organism–response) theoretical model, this study integrates methods including space syntax analysis, POI diversity measurement, streetscape semantic segmentation, and kernel density estimation. …”
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A framework for the acoustic simulation of passing vehicles using variable length delay lines by Stefano Damiano, Luca Bondi, Andre Guntoro, Toon van Waterschoot

“…The validation shows that sounds generated with the proposed method achieve a good match with recorded events in terms of power spectral density and psychoacoustics metrics as well as a perceptually plausible result.…”
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A novel theoretical approach to predict the interannual variability of sulfur in Mercury’s exosphere and subsurface by S. Verkercke, J. Y. Chaufray, F. Leblanc, A. Georgiou, M. S. Phillips, G. Munaretto, J. Lewis, A. Ricketts, L. Morrissey

“…Using a 3D exospheric global model with a Monte-Carlo test-particles approach and accounting for species diffusion in the first meter of Mercury’s regolith, this study aims to provide the first global prediction of the interannual variability of neutral sulfur density in both Mercury’s exosphere and subsurface. …”
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Simulation of the Extruder Screw Parameters by M. G. Zagoruiko, V. V. Vasilchikov, A. K. Mamakhai

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