Results 81 to 90 of about 259,360 (285)

Numerical investigation of elastic-plastic buckling performance of circular arched cellular steel beam using nonlinear finite element analysis method

Heliyon
This study presents a numerical investigation of the in-plane elastic-plastic performance, post-buckling mode, and arched web-post shear resistance of a pinned end circular arched cellular steel beam using ABAQUS nonlinear finite element analysis package.
Besukal Befikadu Zewudie, Kefiyalew Zerfu, Elmer C. Agon   +2 more
doaj   +1 more source

ETC antenna (easy to configure): a new approach to smart management of cellular networks

Iteckne, 2010
The ETC antenna is presented as an intermediate approach between the current radio cellular systems and the future cellular system with the smart antennas. The goal is to get a flexible and asynchronous way to optimize the coverage following the schedule
Óscar ElÍas Herrera Bedoya, Alejandro Díaz Morcillos, Juan Vicente Balbastre Tejedor   +2 more
doaj   +1 more source

Channel Estimation and Hybrid Precoding for Millimeter Wave Cellular Systems

, 2014
Millimeter wave (mmWave) cellular systems will enable gigabit-per-second data rates thanks to the large bandwidth available at mmWave frequencies. To realize sufficient link margin, mmWave systems will employ directional beamforming with large antenna ...
Alkhateeb, Ahmed, Ayach, Omar El, Heath Jr, Robert W., Leus, Geert   +3 more
core   +1 more source

Oxide‐Free Titanium Coatings by Wire Arc Spraying in a Silane‐Doped Inert Atmosphere

Advanced Engineering Materials, EarlyView.
A silane‐doped argon atmosphere enables the production of oxide‐free titanium coatings via twin‐wire arc spraying at ambient pressure. This innovative approach eliminates residual oxygen, creating process conditions that prevent oxidation and nitride formation.
Manuel Rodriguez Diaz, Maik Szafarska, René Gustus, Kai Möhwald, Hans Jürgen Maier   +4 more
wiley   +1 more source

Compact Multi-Wideband Array for Millimeter-Wave Communications Using Squint Beams

IEEE Access, 2020
Millimeter-wave (mmWave) cellular systems leverage the hybrid analog-digital structure to balance the costs and the capacity performance by using fewer Radio Frequency (RF) chains and the spatial sparsity of the channel.
Xiaoliang Pan, Chunguo Li, Meng Hua, Wen Yan, Luxi Yang   +4 more
doaj   +1 more source

Thermomechanical Fatigue and Creep–Fatigue Interaction of Inconel 718 Additively Manufactured by Laser Beam Powder Bed Fusion

Advanced Engineering Materials, EarlyView.
Thermomechanical fatigue tests of laser beam powder bed fusion (PBF‐LB) Inconel 718 show that the additively manufactured material reaches almost the lifetimes of conventionally‐rolled material under no‐dwell conditions. Introducing dwell times at the maximum temperature markedly reduces the lifetimes due to pronounced grain boundary sliding associated
Stefan Guth, Tomáš Babinský, Jan Lars Riedel, Wen Hao Kan, Aijun Huang, Martin Heilmaier, Ivo Šulák   +6 more
wiley   +1 more source

Difference in the relative biological effectiveness and DNA damage repair processes in response to proton beam therapy according to the positions of the spread out Bragg peak

Radiation Oncology, 2017
Background Cellular responses to proton beam irradiation are not yet clearly understood, especially differences in the relative biological effectiveness (RBE) of high-energy proton beams depending on the position on the Spread-Out Bragg Peak (SOBP ...
Hidehiro Hojo, Takeshi Dohmae, Kenji Hotta, Ryosuke Kohno, Atsushi Motegi, Atsushi Yagishita, Hideki Makinoshima, Katsuya Tsuchihara, Tetsuo Akimoto   +8 more
doaj   +1 more source

Neuroprotective effects of carnitinoid compounds in rodent cellular and in vivo models of mitochondrial complex I dysfunction [PDF]

, 2019
Rotenone-mediated mitochondrial complex I inhibition was used to model Parkinson’s disease-like syndrome in Lewis rats. Tyrosine hydroxylase immunolabeling demonstrated a decrease in the number of dopaminergic neurons as well as aberrant morphology in ...
Steliou, Kosta
core  

Al–Cu Composite Casting of Laser‐Deoxidized Copper: Bonding, Interfacial Chemistry, and Thermal Conductivity

Advanced Engineering Materials, EarlyView.
This study investigates laser‐based oxide removal of Cu inserts in oxygen‐free conditions and examines long‐term oxidation kinetics and surface chemistry under different atmospheres via X‐ray photoelectron spectroscopy. Al–Cu compound casting with differently oxidized surfaces is performed, and intermetallic phase formation, morphology, and thermal ...
Timon Steinhoff, Finn‐Lennard Janthur, Sascha Zimmermann, Sarah Seffer, Jörg Hermsdorf, René Gustus, Ludger Overmeyer, Wolfgang Maus‐Friedrichs, Hans Jürgen Maier, Christian Klose   +9 more
wiley   +1 more source

Evaluating Energy Absorption Performance of Filled Lattice Structures

Advanced Engineering Materials, EarlyView.
Maximum stress must be considered to robustly evaluate energy absorber designs. This approach was applied to compare all types of absorbers in a single Ashby diagram and determine the utility of filling lattice voids with a second material. High‐performance fillers can improve the performance of lattices that are limited by buckling or catastrophic ...
Christian Bonney, William P. King, Iwona Jasiuk   +2 more
wiley   +1 more source