Results 91 to 100 of about 2,209,550 (335)

A comparative study of path loss models in the ultra-high frequency band in a vegetated environment [PDF]

, 2022
Enobong Patrick Obot, Michael U. Onuu, John Ubi Arikpo, Christian N. Nwosu   +3 more
openalex   +1 more source

Elinvar Materials: Recent Progress and Challenges

Advanced Engineering Materials, EarlyView.
Elinvar materials, exhibiting temperature‐invariant elastic modulus, are critical for precision instruments and emerging technologies. This article reviews recent progress in the field, with a focus on the anomalous thermoelastic behavior observed in key material systems.
Wenjie Li, Yang Ren
wiley   +1 more source

Admissible Velocity Propagation : Beyond Quasi-Static Path Planning for High-Dimensional Robots

, 2016
Path-velocity decomposition is an intuitive yet powerful approach to address the complexity of kinodynamic motion planning. The difficult trajectory planning problem is solved in two separate, simpler, steps: first, find a path in the configuration space
Caron, Stéphane, Lertkultanon, Puttichai, Nakamura, Yoshihiko, Pham, Quang-Cuong   +3 more
core   +1 more source

Multimodal Mechanical Testing of Additively Manufactured Ti6Al4V Lattice Structures: Compression, Bending, and Fatigue

Advanced Engineering Materials, EarlyView.
In this experimental study, the mechanical properties of additively manufactured Ti‐6Al‐4V lattice structures of different geometries are characterized using compression, four point bending and fatigue testing. While TPMS designs show superior fatigue resistance, SplitP and Honeycomb lattice structures combine high stiffness and strength. The resulting
Klaus Burkart, Jonas Schmidt, Anastasiya Toenjes, Johanna Eisenträger   +3 more
wiley   +1 more source

Laser Metal Deposition of Aluminum Alloys 7075 and 5083 with the Addition of Volatile Alloying Elements through Powder Blending

Advanced Engineering Materials, EarlyView.
This study investigates laser metal deposition of aluminum alloys EN AW‐7075 and EN AW‐5083, using powder blending to compensate zinc and magnesium evaporation. In situ alloying and ex situ alloying with ZnAl12 and AZ91 preserve near‐standard compositions and improve mechanical properties.
Finn Bendixen, Anastasiya Toenjes, Annika Bohlen, Thomas Seefeld   +3 more
wiley   +1 more source

Outdoor to Indoor Penetration Loss at 28 GHz for Fixed Wireless Access

, 2017
This paper present the results from a 28 GHz channel sounding campaign performed to investigate the effects of outdoor to indoor penetration on the wireless propagation channel characteristics for an urban microcell in a fixed wireless access scenario ...
Bas, C. Umit, Choi, Thomas, Hur, Sooyoung, Molisch, Andreas F., Park, Jeongho, Wang, Rui, Whang, Kuyeon, Zhang, Jianzhong   +7 more
core   +1 more source

PBF‐LB/M of Ti‐6Al‐4V: High‐Pressure Solution Treatment and Aging for Applications in a Sustainable Aerospace

Advanced Engineering Materials, EarlyView.
Additive manufacturing (AM) allows great geometric freedom for lightweight components. As parts are progressively optimized exploiting potentials in AM leading in smaller material cross sections, high pressure solution treating and aging (STA) treatments show an enormous potential for strongly improving material properties.
Mika León Altmann, Andre Danzig, Freerk Syassen, Rainer Fechte‐Heinen, Anastasiya Toenjes   +4 more
wiley   +1 more source

Machine-Learning-Based Path Loss Prediction for Vehicle-to-Vehicle Communication in Highway Environments

Applied Sciences
Vehicle-to-vehicle (V2V) communication, which plays an important role in intelligent transportation systems, has been statistically proven to improve traffic efficiency and reduce the probability of accidents.
Nugman Sagir, Zeynep Hasirci Tugcu
doaj   +1 more source

Measurement and modeling of indoor off-body channel in the 9.5～10.5 GHz band

物联网学报, 2022
In order to explore the wireless propagation characteristics of high-frequency indoor off-body channel, off-body channel measurements were carried out on multiple typical indoor scenes in the 9.5～10.5 GHz frequency band.In terms of large-scale fading ...
Shanhu HUANG, Jun SUN, Haofei CHANG, Wenjun LV, Qin YANG   +4 more
doaj  

Quantum Measurements and the kappa--Poincare Group

, 2005
The possible description of the vacuum of quantum gravity through the so called kappa--Poincare group is analyzed considering some of the consequences of this symmetry in the path integral formulation of nonrelativistic quantum theory.
A. Camacho-Galván, Abel Camacho, B.C. Carlson, C. Presilla, G. Amelino-Camelia, G. Amelino-Camelia, G. Amelino-Camelia, G. Amelino-Camelia, G. Amelino-Camelia, G. Amelino-Camelia, J. Ellis, J. Lukierski, J.J. Sakurai, M.B. Mensky, P. Huet, R.P. Feynman, R.P. Feynman, W. Dittrich   +17 more
core   +1 more source