Results 81 to 90 of about 186,110 (300)

Um aparato experimental para o estudo do princípio de Arquimedes

Revista Brasileira de Ensino de Física
Neste trabalho apresentamos um aparato experimental para o estudo do princípio de Arquimedes, assim como a experiência realizada com ele e uma sugestão de roteiro para esta experiência que pode ser usado em aulas de física experimental.
Valmar Carneiro Barbosa, Ana Maria Senra Breitschaft   +1 more
doaj   +1 more source

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

Substantia, 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

Multimodal Locomotion in Insect‐Inspired Microrobots: A Review of Strategies for Aerial, Surface, Aquatic, and Interfacial Motion

Advanced Robotics Research, EarlyView.
This review identifies key design considerations for insect‐inspired microrobots capable of multimodal locomotion. To draw inspiration, biological and robotic strategies for moving in air, on water surfaces, and underwater are examined, along with approaches for crossing the air–water interface.
Mija Jovchevska, Kaushik Jayaram, Nicole Xu   +2 more
wiley   +1 more source

Behaviour and buoyancy control in a shallow diving marine mammal, the dugong (Dugong dugon)

Frontiers in Marine Science
Shallow diving air-breathing animals face the challenge of maximising oxygen stores to extend dive duration while being subject to rapid pressure changes, especially in the first 10 m.
Renae N Lambourne, Renae N Lambourne, Helene Marsh, Christophe Cleguer, Mark Hamann, Adrian C. Gleiss, Adrian C. Gleiss   +6 more
doaj   +1 more source

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

Revija 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  

Dynamic leveling control of a wireless self-balancing ROV using fuzzy logic controller [PDF]

, 2013
A remotely operated vehicle (ROV) is essentially an underwater mobile robot that is controlled and powered by an operator outside of the robot working environment.
Ayob, Mohammad Afif
core  

Multicomponent theory of buoyancy instabilities in astrophysical plasma objects: The case of magnetic field perpendicular to gravity

, 2010
We develop a general theory of buoyancy instabilities in the electron-ion plasma with the electron heat flux based not upon MHD equations, but using a multicomponent plasma approach in which the momentum equation is solved for each species.
Anatoly K. Nekrasov, Balbus, Balbus, Binney, Braginskii, Chandran, Desch, Eilek, Gossard, Loewenstein, Mohsen Shadmehri, Narayan, Narayan, Nekrasov, Nekrasov, Nekrasov, Nishikawa, Parrish, Pedlosky, Quataert, Rasera, Reynolds, Sarazin, Schwarzschild, Sharma, Vedenov, Vedenov   +26 more
core   +1 more source

Origami‐Inspired Structural Design for Aquatic‐Terrestrial Amphibious Robots

Advanced Robotics Research, EarlyView.
This work presents a lightweight amphibious origami robot actuated by a single shape memory alloy wire. A rigid foldable origami structure with displacement amplification enables efficient terrestrial crawling and aquatic swimming. The addition of fan‐shaped units allows controllable turning in both environments.
Weiqi Liu, Chunlong Wang, Xiaohang Sun, Hongwei Guo, Jiayao Ma, Yan Chen   +5 more
wiley   +1 more source

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

Aerul 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., AZAROUA A., NEDJAI R., BARTOUT P., ALDOMANY M., MILLOT CAMILLE   +5 more
doaj  

Effects of salinity on specific gravity and viability of eggs of a North American minnow (Cyprinidae)

Scientia Marina, 2009
The influence of salinity on survival, specific gravity, and size of eggs of the endangered Hybognathus amarus (Rio Grande silvery minnow) was studied to provide insight into factors affecting their potential dispersal and fate.
David E. Cowley, Janelle C. Alleman, Rossana Sallenave, Ryan R. McShane, Patrick D. Shirey   +4 more
doaj   +1 more source