بحث بسيط
السجلات المعروضة 3151 -- 3160 من 3174
Cryptocurrencies and Finance Theories
(
Universiti Teknologi MARA.
, 2021 , Article)
Cryptocurrency (CCY) as a new key player in the currency system that has drawn the attention of scholars to examine its influence, relations and the opportunities that it may provide. However, a financial theoretical ...
Fractional-order controllers for stick-slip vibration mitigation in oil well drill-strings
(
SAGE
, 2021 , Article)
Drillstring–borehole interaction can produce severely damaging vibrations. An example is stick–slip vibration, which negatively affects drilling performance, tool integrity and completion time, and costs. Attempts to ...
The COVID-19 pandemic: An opportunity to make mental health a higher public health priority
(
Cambridge University Press
, 2021 , Article Review)
Coronavirus disease 2019 (COVID-19) was first recognised in December 2019. The subsequent pandemic has caused 4.3 million deaths and affected the lives of billions. It has increased psychosocial risk factors for mental ...
Modified zeolite/polysulfone mixed matrix membrane for enhanced CO2/CH4 separation
(
MDPI AG
, 2021 , Article)
In recent years, mixed matrix membranes (MMMs) have received worldwide attention for their potential to offer superior gas permeation and separation performance involving CO2 and CH4. However, fabricating defect-free MMMs ...
Immunomodulatory effects of vitamin d supplementation in a deficient population
(
Multidisciplinary Digital Publishing Institute (MDPI)
, 2021 , Article)
In addition to its canonical functions, vitamin D has been proposed to be an important mediator of the immune system. Despite ample sunshine, vitamin D deficiency is prevalent (>80%) in the Middle East, resulting in a high ...
Some α − ϕ-Fuzzy Cone Contraction Results with Integral Type Application
(
Hindawi Limited
, 2021 , Article)
In this paper, we define α-admissible and α-ϕ-fuzzy cone contraction in fuzzy cone metric space to prove some fixed point
theorems. Some related sequences with contraction mappings have been discussed. Ultimately, our ...
Broadband vibration energy harvesting from a non-deterministic system: Performance of different piezoelectric patch shapes
(
IOP Publishing Ltd
, 2021 , Article)
Harvesting energy from ambient structural vibration using piezoelectric materials gained massive interest in the past decade. Piezoelectric harvesters can be incorporated in many applications; however, one of the main ...
Valorization of salt post-modified poultry manure biochars for phosphorus recovery from aqueous solutions: investigations on adsorption properties and involved mechanism
(
Springer
, 2021 , Article)
In this research work, raw poultry manure biochar (RPM-B) was post-modified by two metal salts and then evaluated for P recovery from aqueous solutions in batch mode. The modified biochar characterization showed that RPM-B ...
Off-design performance analysis of combined CSP power and direct oxy-combustion supercritical carbon dioxide cycles
(
Elsevier
, 2021 , Article)
The solar power tower (SPT) has the potential to achieve high efficiency and large-scale power production due to its high achievable temperatures. However, thermal energy storage (TES) is required to solve the intermittency ...
An efficient image encryption scheme based on fractal Tromino and Chebyshev polynomial
(
Springer International Publishing
, 2021 , Article)
The security of digital content during transmission and storage through insecure communication links and databases is a challenging issue in today's world. In this article, an encryption scheme based on fractal Tromino and ...