Results 71 to 80 of about 491,279 (390)

Functional parameters of spermatozoa obtained by a new selection device

FEBS Open Bio, EarlyView.
This study compares density gradient centrifugation and the LensHooke CA0™ device for sperm separation. DGC requires multiple steps, specialized equipment, and technical expertise. In contrast, the CA0 device offers key practical and methodological advantages, resulting in a faster, simpler, and more affordable sperm selection method.
Julio C. Chávez, Paulina Torres, Gabriela Carrasquel‐Martínez, María G. Figueroa‐Méndez, Diana Flores, Lina Villar, Israel Maldonado, Marcela B. Trevino, Claudia Treviño   +8 more
wiley   +1 more source

Designing displaced lunar orbits using low-thrust propulsion [PDF]

, 2010
The design of spacecraft trajectories is a crucial task in space mission design. Solar sail technology appears as a promising form of advanced spacecraft propulsion which can enable exciting new space science mission concepts such as solar system ...
Colin R. McInnes, Farquhar R., Gómez G., Gómez G., Jules Simo, Leipold M., Roy A. E., Simo J., Thurman R., Vonbun F.   +9 more
core   +1 more source

Untethered soft robotic matter with passive control of shape morphing and propulsion

Science Robotics, 2019
Untethered, soft robotic matter repeatedly self-morphs and propels in response to thermal stimuli via active hinges. There is growing interest in creating untethered soft robotic matter that can repeatedly shape-morph and self-propel in response to ...
Arda Kotikian, C. McMahan, E. Davidson, Jalilah M. Muhammad, Robert D. Weeks, C. Daraio, J. Lewis   +6 more
semanticscholar   +1 more source

Quantitative Iron Measurements in the Basal Ganglia of NBIA Patients Using QSM: Insights From a Tertiary Center

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective Neurodegeneration with brain iron accumulation (NBIA) comprises rare genetic disorders characterized by predominantly extrapyramidal symptoms and iron deposition in the basal ganglia. Conventional magnetic resonance imaging (MRI) detects qualitative changes but cannot accurately quantify iron accumulation. Quantitative susceptibility
Özge Uygun, Alpay Özcan, Fuat Kaan Aras, Evrim Bozdemir, Sibel Uğur İşeri, Murat Gültekin, Nihan Hande Akçakaya, Orkhan Mammadov, Gülay Kır, Dilek İnce Günal, Neşe Tuncer, Fatma Betül Özdilek, Banu Özen Barut, Ercan Köse, Hülya Apaydın, Asuman Ali, Sultan Çağırıcı, Pınar Topaloğlu, Alp Dinçer, Zuhal Yapıcı   +19 more
wiley   +1 more source

Jellyfish and Fish Solve the Challenges of Turning Dynamics Similarly to Achieve High Maneuverability

Fluids, 2020
Turning maneuvers by aquatic animals are essential for fundamental life functions such as finding food or mates while avoiding predation. However, turning requires resolution of a fundamental dilemma based in rotational mechanics: the force powering a ...
John O. Dabiri, Sean P. Colin, Brad J. Gemmell, Kelsey N. Lucas, Megan C. Leftwich, John H. Costello   +5 more
doaj   +1 more source

A Review of Distributed Electric Propulsion Concepts for Air Vehicle Technology

2018 AIAA/IEEE Electric Aircraft Technologies Symposium (EATS), 2018
The emergence of distributed electric propulsion (DEP) concepts for aircraft systems has enabled new capabilities in the overall efficiency, capabilities, and robustness of future air vehicles.
H. D. Kim, Aaron T. Perry, Phillip J. Ansell   +2 more
semanticscholar   +1 more source

Data‐driven forecasting of ship motions in waves using machine learning and dynamic mode decomposition

International Journal of Adaptive Control and Signal Processing, EarlyView.
Summary Data‐driven forecasting of ship motions in waves is investigated through feedforward and recurrent neural networks as well as dynamic mode decomposition. The goal is to predict future ship motion variables based on past data collected on the field, using equation‐free approaches.
Matteo Diez, Mauro Gaggero, Andrea Serani   +2 more
wiley   +1 more source

Aggregation and sedimentation of active Brownian particles at constant affinity

, 2018
We study the motility-induced phase separation of active particles driven through the interconversion of two chemical species controlled by ideal reservoirs (chemiostats).
Chatterjee, Arkya, Fischer, Andreas, Speck, Thomas   +2 more
core   +1 more source

The Development of a Next-Generation Latticed Resistojet Thruster for CubeSats

Aerospace
CubeSat and small satellite resistojet heat exchanger designs are based on conventional concepts that have been used since the 1960s, being primarily limited to helical or twisted tape heat exchangers.
Daniel Turner, Robert Howie, Phil Bland
doaj   +1 more source

A Novel Self-Deployable Solar Sail System Activated by Shape Memory Alloys

Aerospace, 2019
This work deals with the feasibility and reliability about the use of shape memory alloys (SMAs) as mechanical actuators for solar sail self-deployment instead of heavy and bulky mechanical booms.
Gianluigi Bovesecchi, Sandra Corasaniti, Girolamo Costanza, Maria Elisa Tata   +3 more
doaj   +1 more source