Results 31 to 40 of about 76,641 (279)

Homogenization in Species Composition and No Change in Aboveground Biomass Across Tibetan Permafrost Regions Over Ten Years

Frontiers in Environmental Science, 2022
The Tibetan Plateau is the most extensive high-elevation grassland on Earth, with the largest expanse of high-elevation permafrost. It is experiencing climate warming that is projected to continue at rates above the global mean, potentially jeopardizing ...
Yan Yang, Kari Klanderud, Yinghui Yang, Huaan Jin, Yaqiong Lu, Tongzuo Zhang, Genxu Wang   +6 more
doaj   +1 more source

Appraisal of Abiogenic Oil (Petroleum) using Mathematical ModelingApproach with certain selectedElements, Minerals and Rocks of Kassa Volcanic Field (KVF) of Jos Plateau State, Nigeria

International Journal of Advances in Scientific Research and Engineering, 2021
The possibility of finding petroleum hydrocarbons in sedimentation (sedimentary rock) or magmatic-hydrothermal (igneous origin) is a matter of probability. A mathematical modeling approach is employed to appraise petroleum hydrocarbons using certain elements, minerals, and rocks whether it is biogenic or abiogenic.
Achuenu Ifeanyi, Joro Joshua Dung, IZEZE ElIJAH OVIE   +2 more
openaire   +2 more sources

A ninth-order first derivative method for numerical integration

Journal of Nigerian Society of Physical Sciences
In this paper, we present a ninth–order block hybrid method for the numerical solution of stiff and non–stiff systems of first–order differential equations.
Richard Akinola, Ezekiel Omole, Joshua Sunday, Stephen Kutchin   +3 more
doaj   +1 more source

Solving hyperchaotic initial value problems using second derivative extended trapezoidal rule of the second kind blended with generalized backward differentiation formulae with variable step size

Recent Advances in Natural Sciences
This paper aims to evaluate the accuracy and performance of the second derivative block extended trapezoidal rule of the second kind, blended with generalized backward differentiation formulae using variable step sizes, in solving hyperchaotic initial ...
E. J. Onoja, U. W. Sirisena
doaj   +1 more source

An exact method for a discrete multiobjective linear fractional optimization [PDF]

, 2007
Integer linear fractional programming problem with multiple objective MOILFP is an important field of research and has not received as much attention as did multiple objective linear fractional programming.
Chergui, M. E-A, Moulai, M.
core   +2 more sources

Optimal control with the effects of ivermectin and live stock availability on malaria transmission

Journal of Nigerian Society of Physical Sciences
Malaria remains a global threat and the conventional methods used for combating the disease leave out mosquitoes that feed outdoors. This study addresses the challenge posed by such mosquitoes based on a tool called ivermectin drug which is lethal to ...
JOSEPHINE ELAMMA OCHIGBO, Joel N. Ndam, Wipuni U. Sirisena   +2 more
doaj   +1 more source

Study on Treatment of Loess Landslide Based on Nanosilica and Fly Ash Composite Stabilizer Filling Fissures

Advances in Civil Engineering, 2020
Frequent occurrence of landslides has seriously threatened the infrastructural projects in the Loess Plateau, China. At the beginning, with development of the landslide, several fissures were generated along the internal weak surface.
Jiulong Gao, Jiading Wang, Yao Wei, Shaotong Jiao, Meng Jing, Jialing Gao, Cong Wang   +6 more
doaj   +1 more source

Physiological and transcriptional mechanisms associated with cadmium stress tolerance in Hibiscus syriacus L.

BMC Plant Biology, 2023
Background Cadmium (Cd) pollution of soils is a global concern because its accumulation in plants generates severe growth retardation and health problems.
Xiang Li, Lanlan Liu, Shixian Sun, Yanmei Li, Lu Jia, Shili Ye, Yanxuan Yu, Komivi Dossa, Yunpeng Luan   +8 more
doaj   +1 more source

On the Topological Characterization of Near Force-Free Magnetic Fields, and the work of late-onset visually-impaired Topologists [PDF]

, 2015
The Giroux correspondence and the notion of a near force-free magnetic field are used to topologically characterize near force-free magnetic fields which describe a variety of physical processes, including plasma equilibrium.
Kotiuga, P. Robert
core   +2 more sources

FIFTH-ORDER A(α)-STABLE BLOCK HYBRID ADAMS-MOULTON METHOD FOR SOLUTIONS OF PREDATOR-PREY AND LORENZ SYSTEMS

Intermaths
Problems associated with nonlinearity in predator-prey and chaotic nature embedded in Lorenz system place a significant challenge on numerical methods for their solutions. Some numerical methods may become unstable as step size increases. In this study,
Oludare Adedire, Paul C. Mordi
doaj   +1 more source