In this work, black nanocarbon-loaded 0–100 parts-per-hundred (phr) PbO-filled acrylonitrile butadiene rubber (NBR)/styrene-butadiene (SBR) blend composites were prepared by using an ordinary standard mixer. Both mechanical and gamma attenuation properties of the samples investigated. Maximum tensile strength elongation at break obtained 40 phr PbO concentration. The values for mass coefficient...

Recently, the high-dimensional negative binomial regression (NBR) for count data has been widely used in many scientific fields. However, most studies assumed dispersion parameter as a constant, which may not be satisfied practice. This paper variable selection and estimation heterogeneous NBR models, model function. Specifically, we proposed double applied ℓ1-penalty to both regressions. Under...

The North Bank Region (NBR) of Gambia rangeland is composed shrubby vegetation with few widely spaced trees and undergrowth forbs grass species on a flat terrain. A study was conducted to ascertain the challenges threats rangelands utilization by livestock in NBR, identify appropriate intervention indicators for sustainable production region.A multi-stage sampling technique employed select 200 ...

Abstract The structure of antioxidants significantly affects the anti-migration and thermal-oxidative aging properties nitrile butadiene rubber (NBR) composites, which are crucial for applications in aerospace, biomedical, fuel cell stack sealing industries. findings reveal that migration rate N -(4-anilino phenyl) maleic imide (MC), with a reactive double bond, is only 15.6%, exhibiting best e...

Abstract This study aims to investigate the potential existence of a cointegration relationship between Romania’s gross domestic product (GDP), credit interest rates charged by financial institutions, and benchmark rate set National Bank Romania (NBR). The identification long-term these variables is considered be significant importance as it may provide deeper understanding interactions GDP dyn...