Results 61 to 70 of about 168,320 (268)

Electric Motor Noise for Small Quadcopters: Part I - Acoustic Measurements [PDF]

open access: yes
There is increased interest in using electric motors to drive propulsors across a range of small air vehicle classes. Applications include both vertical lift and conventional takeoff and landing systems for Small Unmanned Aircraft Systems.
Henderson, Brenda S., Huff, Dennis L.
core   +1 more source

The use of Electromagnetic and Vertical Electrical Sounding Methods in Groundwater Exploration.

open access: yesBulletin Of The Mineral Research and Exploration, 2018
Gana’daki Twifo - Hemang Asagi Denkyira Bolgeleri’nde yeralti sularinin arastirilmasi icin Elektromanyetik Profil (EM) ve Dusey Elektrik Sondaj (DES) calismalari yapilmistir. Bu iki jeofizik yontem, Achiase, Mbaa Mpe Hia Kasabasi ve Moseaso Kasabasinin altindaki yeralti suyu potansiyellerini arastirmak icin kullanilmistir. Bu makalede, lineer grafikler
MOHAMMED NAZIFI, Hafiz, GÜLEN, Levent
openaire   +4 more sources

Atomically Resolved Acoustic Dynamics Coupled with Magnetic Order in a Van der Waals Antiferromagnet

open access: yesAdvanced Materials, EarlyView.
Magnetically coupled acoustic phonon modes (f1, f2, f3) are captured by ultrafast X‐ray diffraction in a prototypical van der Waals antiferromagnet FePS3, including their atomic displacement vectors (u) and the acoustic propagation wave vectors (k). Notably, the atomic displacement vector and amplitude of these modes, represented by the direction and ...
Faran Zhou   +24 more
wiley   +1 more source

Multidisciplinary Optimization of Urban-Air-Mobility Class Aircraft Trajectories with Acoustic Constraints [PDF]

open access: yes
The design and analysis of on-demand mobility class vehicles will require thorough acoustic analysis to ensure that more numerous aircraft can operate in densely populated areas without causing excessive levels of noise.
Aretskin-Hariton, Eliot Dan   +2 more
core   +1 more source

Autowaves in a dc complex plasma confined behind a de Laval nozzle

open access: yes, 2013
Experiments to explore stability conditions and topology of a dense microparticle cloud supported against gravity by a gas flow were carried out. By using a nozzle shaped glass insert within the glass tube of a dc discharge plasma chamber a weakly ...
Fink, M. A.   +6 more
core   +1 more source

Advanced Techniques for Scalable Woven E‐Textiles Manufacturing

open access: yesAdvanced Materials Technologies, EarlyView.
This review highlights recent advances in scalable weaving techniques for e‐textiles, emphasizing innovations in multilayer structures, conductive yarn integration, and loom modifications. It summarizes emerging materials, fabrication strategies, and performance considerations that enable reliable, durable, and industrially scalable woven electronic ...
Faisal Abedin   +2 more
wiley   +1 more source

Assisting the autistic To reduce anxiety caused by their environment [PDF]

open access: yes, 2014
Many people with Autistic Spectrum Disorder (ASD) find certain sounds so unpleasant that their lifestyle can be severely impaired by the need to avoid these noises.
Atherton, MA, Rotter, KRG
core  

Charged anisotropic matter with linear or nonlinear equation of state

open access: yes, 2010
Ivanov pointed out substantial analytical difficulties associated with self-gravitating, static, isotropic fluid spheres when pressure explicitly depends on matter density.
C. W. Misner   +6 more
core   +1 more source

Strategies for Enhancing Thermal Conductivity of PDMS in Electronic Applications

open access: yesAdvanced Materials Technologies, EarlyView.
This review explores effective strategies for enhancing heat dissipation in Polydimethylsiloxane (PDMS)‐based composites, focusing on particle optimization, 3D network design, and multifunctional integration. It offers key insights into cutting‐edge methods and simulations that are advancing thermal management in modern electronic devices.
Xiang Yan, Marisol Martin‐Gonzalez
wiley   +1 more source

Determination of Clay and Sand Volume Using Vertical Electrical Sounding

open access: yesInternational Journal of Innovative Science and Research Technology (IJISRT)
This study presents the results of an electrical resistivity survey conducted in Agudama Epie, Yenagoa local government area, Bayelsa State, Nigeria. The primary objective of the survey was to estimate the volume of clay and sand within a rectangular land parcel measuring 100 m by 200m in the study area.
Ebiegberi Oborie   +2 more
openaire   +1 more source

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