Results 11 to 20 of about 22,239 (263)

Non-wetting phase saturation after drainage from the wetting-phase-filled porous medium

open access: yesJournal of Fluid Science and Technology, 2015
Understanding and predicting the efficiency of displacement, i.e., the non-wetting phase saturation after drainage, is of great importance in many practical applications.
Tetsuya SUEKANE   +2 more
doaj   +1 more source

Computational investigation on turbulent heat transfer of supercritical CO2 in the half-roughen horizontal pipe

open access: yesFrontiers in Energy Research, 2023
To address the heat transfer degradation that occurs in the top section of horizontal pipes when sCO2 fluid flows are heated, the upper half wall with higher temperatures is particularly roughened using uniform sand-grain roughness.
Jun Yang   +3 more
doaj   +1 more source

Preparation and Evaluation of Berberine Alginate Beads for Stomach-Specific Delivery

open access: yesMolecules, 2011
The purpose of this research was to prepare floating calcium alginate beads of berberine for targeting the gastric mucosa and prolonging their gastric residence time.
Hui Pang   +5 more
doaj   +1 more source

First insights into the shortfin mako shark (Isurus oxyrinchus) fine-scale swimming behaviour

open access: yesRoyal Society Open Science, 2023
As regional endotherms, lamnid sharks can sustain high cruising speeds and perform frequent speed bursts. However, since endothermy comes with high energetic costs, lamnids may adopt different swimming strategies to manage their energy budget ...
Bruno M. Saraiva   +4 more
doaj   +1 more source

Design, Control and Implementation of Torus-Type Omniorientational Blimp With Tilting Actuators

open access: yesIEEE Access, 2021
Buoyancy-aided unmanned aerial vehicle (UAV) has a powerful advantage in terms of flight time and safety, compared to conventional multirotors. However, previously developed platforms showed limited flight maneuverability (i.e.
Seung Hwan Song, Hyouk Ryeol Choi
doaj   +1 more source

Direct measurement of swimming and diving kinematics of giant Atlantic bluefin tuna (Thunnus thynnus) [PDF]

open access: yesRoyal Society Open Science, 2019
Tunas possess a range of physiological and mechanical adaptations geared towards high-performance swimming that are of considerable interest to physiologists, ecologists and engineers.
Adrian C. Gleiss   +4 more
doaj   +1 more source

Mathematical model of hot-air balloon steady-state vertical flight performance

open access: yesAviation, 2021
Vertical flight performance of Lighter-than-Air free hot-air balloons is derived and discussed. Novel mathematical model using lumped-parameters has been used to model balloon flight dynamics and steady-state performance in particular.
Nihad E. Daidzic
doaj   +1 more source

From Water to the Stars: A Reinterpretation of Galileo’s Style

open access: yesSubstantia, 2017
Galileo Galilei’s contribution during the early stages of the scientific revolution and his clash with the Catholic Church have been discussed, studied, and written about for many decades.
Louis Caruana Sj
doaj   +1 more source

Analysis of Understanding the Concept of Buoyancy in the Context of its Transfer from Pre-school Teachers to Children [PDF]

open access: yesRevija za Elementarno Izobraževanje, 2014
Kindergarten curricula (Bahovec et al. 1999, 37) cover different areas of education that are sensibly interconnected and integrated. Science is one of the areas that represent child’s first learning about the surrounding world and the first introduction ...
Petra Furlan, Samo Fošnarič
doaj  

The stability of the water column in french ponds (limousin region) by the calculation of the wedderburn number [PDF]

open access: yesAerul şi Apa: Componente ale Mediului, 2014
Oxygenation and biological life in lakes, reservoirs and ponds depend on the stability of the water column and on the rhythms of stratification and mixing periods.
TOUCHART L.   +5 more
doaj  

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