Zobrazeno 1 - 10
of 185
pro vyhledávání: '"M. A. Usman"'
Publikováno v:
Journal of Applied Sciences and Environmental Management, Vol 28, Iss 8 (2024)
The objective of this paper is to investigate the direction of groundwater flow, factors affecting drawdown and the effects of over-pumping in a confined aquifer using appropriate differential equations for steady and unsteady states. The results sho
Externí odkaz:
https://doaj.org/article/46287d2366b0411cbefe7c29d7c45fcb
Publikováno v:
Journal of Applied Sciences and Environmental Management, Vol 28, Iss 3 (2024)
In this paper, the effect of coefficient of viscous damping on the dynamic analysis of Euler-Bernoulli beam resting on elastic foundation was investigated using Integral-Numerical method which reduces to an ordinary differential equation with series
Externí odkaz:
https://doaj.org/article/724adc9920b44b21970548def4a144c1
Publikováno v:
Journal of Applied Sciences and Environmental Management, Vol 28, Iss 3 (2024)
Groundwater flow problems can be expressed mathematically with the employ of partial differential equations and which could be solved analytically or numerically. The results obtained showed that the direction of flow of groundwater is from a region
Externí odkaz:
https://doaj.org/article/6c552f4cfc484644a1a1df7bc6a214b1
Publikováno v:
Journal of Applied Sciences and Environmental Management, Vol 28, Iss 2 (2024)
This work uses a mathematical model to investigate the impact of physical factors on the non-isothermal flow of Powell-Eyring fluid with variations in thermal conductivity and viscosity through a porous medium. The governing equations defining the fl
Externí odkaz:
https://doaj.org/article/7109842ae0a04cc2af328c316ec09950
Publikováno v:
Bulgarian Journal of Soil Science, Vol 7, Iss 2, Pp 105-118 (2022)
A toposequence soils study was undertaken along Donga River in Manya, Takum LGA Northeast Nigeria. Three (3) profile pits were sunk using physiographic positions (upper slope, mid-slope and valley bottom) and the soil samples were collected based
Externí odkaz:
https://doaj.org/article/8be300a5e6f049438362577958b78e8e
Autor:
F. M. S. A. Kirkels, H. M. Zwart, M. O. Usman, S. Hou, C. Ponton, L. Giosan, T. I. Eglinton, F. Peterse
Publikováno v:
Biogeosciences, Vol 19, Pp 3979-4010 (2022)
Monsoonal rivers play an important role in the land-to-sea transport of soil-derived organic carbon (OC). However, spatial and temporal variation in the concentration, composition, and fate of this OC in these rivers remains poorly understood. We inv
Externí odkaz:
https://doaj.org/article/5ee6390d4f284c7694476cec04690615
Autor:
F. M. S. A. Kirkels, H. J. de Boer, P. Concha Hernández, C. R. T. Martes, M. T. J. van der Meer, S. Basu, M. O. Usman, F. Peterse
Publikováno v:
Biogeosciences, Vol 19, Pp 4107-4127 (2022)
The large difference in the fractionation of stable carbon isotopes between C3 and C4 plants is widely used in vegetation reconstructions, where the predominance of C3 plants suggests wetter and that of C4 plants drier conditions. The stable carbon i
Externí odkaz:
https://doaj.org/article/4dd7b41fc51c4eefb86c0ad687311e06
Autor:
Waheed A. Khan, Shahzaib Hamid, M. Rehan Usman, Ali Raza, M. Arslan Usman, Christos Politis, Gandeva Bayu Satrya
Publikováno v:
IEEE Access, Vol 10, Pp 121561-121579 (2022)
Electricity Transmission plays an imperative role in smooth provision of power to the consumers. High voltage direct current (HVDC) system has a lead over high voltage alternate current (HVAC) system in various aspects. As DC transmissions lines tran
Externí odkaz:
https://doaj.org/article/de6e1c82a68d46048c82cb786ac669c0
Publikováno v:
IEEE Access, Vol 10, Pp 15261-15278 (2022)
The Smart Grid (SG) is the technological development that incorporates digital technologies and advanced communication methods to determine and respond to variations in electricity consumption in order to revolutionize power distribution, transmissio
Externí odkaz:
https://doaj.org/article/5e8f0ecc3a484338911147f3e4e88957
Autor:
Waheed A. Khan, Ali Raza, M. Rehan Usman, Shahzaib Hamid, Saif-Ur- Rehman, M. Arslan Usman, Christos Politis
Publikováno v:
IEEE Access, Vol 9, Pp 157371-157383 (2021)
As high voltage DC power system is gaining popularity, power electronic switching devices are becoming increasingly advanced to overcome problems of timely fault isolation. In this context, hybrid DC circuit breakers (DCHCBs), especially, together wi
Externí odkaz:
https://doaj.org/article/99c152b3ac7040a7a5d3bb4839c2cfda