Results 61 to 70 of about 3,823,424 (306)

An experimental investigation into liquid jetting modes and break-up mechanisms conducted in a new reduced gravity facility

, 2006
Liquid jets, important to many industrial applications including various drop-on-demand processes, are experimentally produced in reduced gravity conditions and analysed to determine the mode the liquid jet is operating in.
Osborne, Barnaby P., Osborne, B, Steinberg, Theodore A., Steinberg, Theodore   +3 more
core   +1 more source

Comparative assessment of crystallographic and cryo‐EM models in the Protein Data Bank

FEBS Open Bio, EarlyView.
Raw data obtained by X‐ray crystallography or cryo‐EM result in experimental maps, ultimately fitted by atomic models. Although the physical principles are different, the final results can be viewed, compared, and evaluated in the same way. With cryogenic electron microscopy (cryo‐EM) on track to surpass X‐ray crystallography as the preferred method ...
Alexander Wlodawer, Pawel Rubach, Zbigniew Dauter, Wojciech Dec, Dariusz Brzezinski, Marta Kulik, Wladek Minor, Mariusz Jaskolski   +7 more
wiley   +1 more source

Reducing gravity takes the bounce out of running [PDF]

Journal of Experimental Biology, 2017
In gravity below Earth normal, a person should be able to take higher leaps in running. We asked ten subjects to run on a treadmill in five levels of simulated reduced gravity and optically tracked center of mass kinematics. Subjects consistently reduced ballistic height compared to running in normal gravity.
Polet, Delyle T., Schroeder, Ryan T., Bertram, John E. A.   +2 more
openaire   +2 more sources

A Two‐Stage Questionnaire and Actigraphy Screening for iRBD in a Multicenter Retrospective Cohort

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective Isolated rapid‐eye‐movement sleep behavior disorder is a prodromal marker of synucleinopathies. However, most cases remain undiagnosed due to the insufficient predictive value of questionnaires and limited access to confirmatory video‐polysomnography. We assessed a two‐stage screening strategy combining a brief questionnaire on rapid‐
Caleb A. Massimi, Giorgio Ricciardiello Mejia, Andre Metzger, Kang Hyun Ryu, Salonee Marwaha, Eva Grzegorczyk, Li Zhou, Eliana Jacobs, Boris Gilyadov, Claudia Kunney, Liqhwa Ncube, Ankit Parekh, Emmanuel Mignot, Fanny M. Elahi, Joseph Winer, Kathleen Poston, Andreas Brink‐Kjaer, Emmanuel H. During   +17 more
wiley   +1 more source

The increased flammability of metallic materials burning in reduced gravity [PDF]

, 2010
Data generated in a normal gravity environment is often used in design and risk assessment for reduced gravity applications. It has been clearly demonstrated that this is a conservative approach for non-metallic materials which have been repeatedly ...
Paulos, Todd, Steinberg, Ted, Castillo, Martin, Lynn, David Benjamin, Plagens, Owen   +4 more
core  

Computational sedimentation modelling calibration: a tool to measure the settling velocity under different gravity conditions [PDF]

Earth Surface Dynamics
Research in zero or reduced gravity is essential to prepare and support planetary sciences and space exploration. In this study, an instrument specifically designed to measure the settling velocity of sediment particles under normal-gravity, hypergravity
N. J. Kuhn, F. Trudu, F. Trudu
doaj   +1 more source

An algebraic bootstrap for dimensionally reduced quantum gravity [PDF]

Nuclear Physics B, 2000
Cylindrical gravitational waves of Einstein gravity are described by an integrable system (Ernst system) whose quantization is a long standing problem. We propose to bootstrap the quantum theory along the following lines: The quantum theory is described in terms of matrix elements e.g.
Niedermaier, M., Samtleben, H.
openaire   +2 more sources

Gravity‐Dependent Modulation of Downbeat Nystagmus: Insights From Velocity‐Storage Dysfunction

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective Downbeat nystagmus varies with head position, a phenomenon termed gravity‐dependent modulation. We aimed to clarify its mechanism using a velocity‐storage model. Methods In 10 patients with downbeat nystagmus due to cerebellar disorders, we recorded eye movements at different pitch‐ and roll‐axis head positions.
Ji‐Hyung Park, Eun‐Hyuk Choi, Jorge Otero‐Millan, David S. Zee, Jeong‐Yoon Choi, Ji‐Soo Kim   +5 more
wiley   +1 more source

Quantum Gravity: Motivations and Alternatives [PDF]

, 2009
The mutual conceptual incompatibility between General Relativity and Quantum Mechanics / Quantum Field Theory is generally seen as the most essential motivation for the development of a theory of Quantum Gravity.
Hedrich, Reiner
core   +1 more source

CAR BODY ROOF CROSS MEMBER GRAVITY DEFORMATION ANALYSIS AND STRUCTURE OPTIMIZATION BASED ON OPTISTRUCT (MT)

Jixie qiangdu, 2022
Car body gravity deformation analysis by finite element method, and roof cross members are easy to have big gravity deformation. By researching on the relationship between gravity deformation and part thickness, camber, rib shape, it can be concluded ...
DENG JiTao, CHENG JiDong
doaj