Results 81 to 90 of about 5,499,886 (333)

Evaluation of the Potential of Laser Shock Peening Compared with Cold Expansion for Improving Fatigue Resistance of Riveted Lap Joints of Aerospace Grade 7175 Al Alloy

open access: yesAdvanced Engineering Materials, EarlyView.
This study investigates laser shock peening for enhancing fatigue performance of riveted aerospace aluminum joints. A comparative approach with cold expansion combines fatigue testing and synchrotron X‐ray methods. Integrating mechanical testing with residual stress and strain characterization provides insights into how different treatments affect the ...
Ogün Baris Tapar   +6 more
wiley   +1 more source

L-Orthogonal Signal Transmission and Detection [PDF]

open access: yesIEEE Transactions on Communications, 1972
This paper investigates the detail capabilities and performance characterization of systems that employ L -orthogonal signaling techniques. L -orthogonal signals represent a unified set of signals wherein the polyphase and orthogonal (biorthogonal) signal sets are included as special cases.
W. Lindsey, M. Simon
openaire   +1 more source

Development and Preliminary In Vivo Study of 3D‐Printed Bioactive Glass Scaffolds with Trabecular Architecture

open access: yesAdvanced Engineering Materials, EarlyView.
This study reports the fabrication of trabecular bioactive glass scaffolds (composition “1d”: 46.1SiO2‐28.7CaO‐8.8MgO‐6.2P2O5‐5.7CaF2‐4.5Na2O wt%) through vat photopolymerization and the relevant results from mechanical testing and in vivo implantation procedures in rabbit femora, showing great promise for bone tissue engineering applications.
Dilshat Tulyaganov   +8 more
wiley   +1 more source

Interdependences between finger movement direction and haptic perception of oriented textures.

open access: yesPLoS ONE, 2018
Although the natural haptic perception of textures includes active finger movements, it is unclear how closely perception and movements are linked. Here we investigated this question using oriented textures.
Alexandra Lezkan, Knut Drewing
doaj   +1 more source

Hybrid Auxetic Architectures: Integrating Curvature‐Driven Design for Enhanced Mechanical Tunability and Structural Performance

open access: yesAdvanced Engineering Materials, EarlyView.
Curvature‐tuned auxetic lattices are designed, fabricated, and mechanically characterized to reveal how geometric curvature governs stretchability, stress redistribution, and Poisson's ratio evolution. Photoelastic experiments visualize stress pathways, while hyperelastic simulations quantify deformation mechanics.
Shuvodeep De   +3 more
wiley   +1 more source

Study of Orthogonal Signals to the Rotation of the Polarization Vector

open access: yesМоделирование и анализ информационных систем, 2013
The objects of this study were the properties of time-bound electromagnetic waves (wave packets) from rotating in space vectors of polarization with a constant angular velocity.
Y. E. Borovkov   +3 more
doaj   +3 more sources

Elimination of Redundancy in Orthogonal Coding Systems

open access: yesБезопасность информационных технологий, 2014
In the article, questions of formation of the new modified set of the orthogonal signals, which mathematical models is the modified set of piecewise and continuous orthogonal functions of Rademakher and Walsh, are considered.
Valery Fedorovich Makarov   +1 more
doaj  

Simultaneous optimized orthogonal matching pursuit with application to ECG compression.

open access: yesPLoS ONE
A greedy pursuit strategy which finds a common basis for approximating a set of similar signals is proposed. The strategy extends the Optimized Orthogonal Matching Pursuit approach to selecting the subspace containing the approximation of all the signals
Laura Rebollo-Neira
doaj   +1 more source

NLOS Signal Detection Based on Single Orthogonal Dual-Polarized GNSS Antenna

open access: yesInternational Journal of Antennas and Propagation, 2017
Nowadays users have a high demand for the accuracy of position and velocity, but errors caused by non-line-of-sight (NLOS) signals cannot be removed effectively. Since the GNSS signal is right-hand circular polarized (RHCP), the axial ratio of the strong
Ke Zhang   +4 more
doaj   +1 more source

System for measuring three fluctuating velocity components in a turbulently flowing fluid [PDF]

open access: yes, 1977
A system is described for measuring fluid velocity in a turbulently flowing fluid including a sensing apparatus for dynamically sensing the mainstream and two orthogonal cross velocity components of the fluid.
Cheng, D. Y.
core   +1 more source

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