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561
Energy conversion of heat from abandoned oil wells to mechanical refrigeration - Transient analysis and optimization
Published 2021“…The effects of the temperature variation of the geofluid over operation time, the working fluids, the high pressure and the temperatures of the heat source and sink are investigated. …”
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562
Evaluation of The Factors Affecting Microplastics and Nanoparticles in Plastic Water Supply Pipes
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563
A nonlinear PID servo controller for computer hard disk drives
Published 2020“…A nonlinear PID scheme is proposed as an efficient hard disk drive servo controller, reducing the settling time and lowering the required control effort. The controller is capable of increasing (decreasing) damping effect when the system output is moving away from (towards) the desired track. …”
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564
Kefir exhibits anti‑proliferative and pro‑apoptotic effects on colon adenocarcinoma cells with no significant effects on cell migration and invasion
Published 2014“…To assess the effect of kefir on cancer metastasis, wound‑healing and time‑lapse movies, in addition to collagen‑based invasion assay, were used. …”
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565
Impact of staying at home measures during COVID-19 pandemic on the lifestyle of Qatar’s population: Perceived changes in diet, physical activity, and body weight
Published 2021“…Participants reported increased sitting/reclining time (1.94 h/day mean increase), screen times (2.05 h/day mean increase) with p < 0.001, and decreased exercise time (0.11 h/day mean reduction) with p < 0.001. …”
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566
Modeling the influence of daily temperature and precipitation extreme indices on vegetation dynamics in Katsina State using statistical downscaling model (SDM)
Published 2023“…All the scenarios present increasing minimum and maximum temperatures and decreasing precipitation, except for RCP8.5, which predicted a more adverse trend. …”
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567
Adopting Geophysical Testing Techniques in Geotechnical Investigation and Shallow Foundation Design
Published 2018Get full text
doctoralThesis -
568
Understanding the phenomenon of saltwater intrusion sourced from desalination plants at coastal aquifers
Published 2023“…For the two-region model, dispersion coefficients were well defined and remained unchanged from the convective–diffusion equation for potassium ions but decreased for bromide ions. Retardation factors for bromide ions were approximately the same, but those for potassium ions, though > 1, were poorly defined. …”
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569
Clinical characteristics and outcome of children with acute cryptorchid testicular torsion: A single-center, retrospective case series study
Published 2024“…The median age of patients at the time of the surgery was 65 months (interquartile range (IQR) 4–136 months). …”
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570
Nonlinear Control of Brushless Dual-Fed Induction Generator With a Flywheel Energy Storage System for Improved System Performance
Published 2025“…After optimization, the SMC settling time was significantly reduced from 0.7 seconds to 19.97 milliseconds, achieving a 96.9% improvement in response speed, while its steady-state error decreased from 0.48 to 0.06, marking an 87.5% reduction in tracking error. …”
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571
The Sources of Variance in the Helsinki Stock Exchange
Published 2017“…Furthermore, inserting the ratio of volume expectation to duration expectation in the ARMA model and the vector error correction (VEC) model, we find that the short-term variance increases (decreases) when more (less) than 1 unit share is traded for 1 unit time.…”
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572
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573
Efficiency of commercial banks in Lebanon
Published 2008“…The stochastic production and cost function estimates show that bank level inefficiency effects decreases with time and increases with number of branches, employees per branch, and ratio of staff to operating expenses.…”
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574
Mapping subnational HIV mortality in six Latin American countries with incomplete vital registration systems
Published 2021“…</p><h3>Results</h3><p dir="ltr">All countries displayed over a 40-fold difference in HIV mortality between municipalities with the highest and lowest age-standardized HIV mortality rate in the last year of study for men, and over a 20-fold difference for women. Despite decreases in national HIV mortality in all countries—apart from Ecuador—across the period of study, we found broad variation in relative changes in HIV mortality at the municipality level and increasing relative inequality over time in all countries. …”
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575
One-year experience of hybrid closed-loop system in children and adolescents with type 1 diabetes previously treated with multiple daily injections: drivers to successful outcomes
Published 2022“…The participants used the sensor 88.4 ± 6.5% of the time with Auto Mode usage 85.6 ± 7.4% during 12 months of HCL system use. …”
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576
Error probability of coded STBC systems in block fading environments
Published 2006“…Results show that the performance degradation due to channel memory decreases as the number of transmit antennas is increased. …”
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577
Origin of arrhythmias in a heart model
Published 2009“…As α decreases, the regular behavior of y oscillator deteriorates, and is found to go through a series of bifurcations. …”
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578
Conflicts Employee-Employee
Published 2012“…The researcher acknowledges several limitations of the research study such as the time limit, the relatively small sample number, the limited questions and the small organization. …”
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579
n-Hexadecane Fuel for a Phosphoric Acid Direct Hydrocarbon Fuel Cell
Published 2015“…The objective of this work was to examine fuel cells as a possible alternative to the diesel fuel engines currently used in railway locomotives, thereby decreasing air emissions from the railway transportation sector. …”
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580
Software quality improvement model for small organizations. (c2000)
Published 2000Get full text
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masterThesis