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Now showing items 8771-8780 of 8899
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 ...
Future Mangrove Carbon Storage Under Climate Change and Deforestation
(
Frontiers Media S.A.
, 2022 , Article)
Mangroves are important sinks of organic carbon (C) and there is significant interest in their use for greenhouse gas emissions mitigation. Adverse impacts on organic carbon storage potential from future climate change and ...
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 ...
Robust and General Model to Forecast the Heat Transfer Coefficient for Flow Condensation in Multi Port Mini/Micro‐Channels
(
Multidisciplinary Digital Publishing Institute (MDPI)
, 2022 , Article)
A general correlation for predicting the two‐phase heat transfer coefficient (HTC) during condensation inside multi‐port mini/micro‐channels was presented. The model was obtained by correlating the two‐phase multiplier, ...
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 ...
Students Impression About Using Mobile Phones in Classroom
(
Kassel University Press GmbH
, 2020 , Article)
Mobile phones are widely used by university students and there is a controversial topic whether students should be able to use them freely during lectures. A survey was distributed seeking student opinions on using mobile ...
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 ...