Results 51 to 60 of about 86,460 (309)

Inhomogeneous structure of the high-latitude ionosphere as observed at Norilsk [PDF]

, 2001
In March and August/September 1995, February 1996, and in March-April 1998, observations of the inhomogeneous structure of the high-latitude ionosphere were carried out at Norilsk (geomagnetic latitude and longitude are 64.2 N and 160.4 E, and L=5.2 ...
Lipko, Yu. V.
core   +4 more sources

Characterization of Defect Distribution in an Additively Manufactured AlSi10Mg as a Function of Processing Parameters and Correlations with Extreme Value Statistics

Advanced Engineering Materials, EarlyView.
Predicting extreme defects in additive manufacturing remains a key challenge limiting its structural reliability. This study proposes a statistical framework that integrates Extreme Value Theory with advanced process indicators to explore defect–process relationships and improve the estimation of critical defect sizes. The approach provides a basis for
Muhammad Muteeb Butt, Varma Kvvssn, Hossein Laieghi, Zia Uddin, Peyman Ansari, E. Kıvanç Sadak, Can Barış Toprak, Hüseyin Kızıl, Enrico Salvati   +8 more
wiley   +1 more source

Optimization of PEDOT: PSS thin film for organic solar cell application [PDF]

, 2014
As a clean and renewable energy source, the development of the organics solar cells is very promising due to the inorganic solar cell inconvenient production process and material shortness.
Abdul Talib, Yuraimy Yakimin
core  

Air‐Pressure–Actuated Vibroacoustic Metamaterial With Tunable Bandgap: Design, Modeling, and Characterization

Advanced Engineering Materials, EarlyView.
This article presents the design, modeling, and characterization of air‐pressure–actuated programmable vibroacoustic metamaterials (PVAMM). The study focuses on leveraging air pressure to dynamically tune resonance frequencies for effective noise attenuation.
William Kaal, Michael M. Becker, Sarah C. L. Fischer   +2 more
wiley   +1 more source

Understanding the Stochastic Nature of Process Parameter Development of Blown Powder Laser Beam Directed Energy Deposition Additive Manufacturing of Pure Molybdenum

Advanced Engineering Materials, EarlyView.
Identified through the use of statistical design of experiments and metallographic investigation, this study exposes the stochastic origins of intergranular cracks in blown powder laser beam directed energy deposition additive manufacturing of pure molybdenum. It further demonstrates a successful crack mitigation approach with direct correlation to the
Nathaniel J. Lies, Daniel E. Driemeyer, Aaron P. Stebner   +2 more
wiley   +1 more source

ION-FAST as the NIRFI’s Ionospheric Diagnostic Platform

Atmosphere
In December 2021, we presented a prototype of a fast ionosonde for vertical sounding based on the usage of publicly available radio-electronic components. This approach led to a major reduction in the cost of the created device. We called our development
Sergey P. Moiseev, Alexei V. Shindin, Kseniya K. Grekhneva, Viktoriya A. Pavlova, Nikita S. Timukin   +4 more
doaj   +1 more source

ELECTRON DENSITY PROFILE RECOVERY ACCURACY AND APPLICATION OF POLYNOMIAL APPROXIMATIONS IN THE FREQUENCY-AND-ANGULAR SOUNDING OF THE IONOSPHERE

Radio Physics and Radio Astronomy, 2019
Purpose: Analysis of the error in recovering the height profile of the electron density of the ionosphere by the frequency-andangular sounding technique in dependence on the accuracy of measuring vertical plane angles of arrival of the probe signals ...
V. G. Galushko
doaj   +1 more source

Оценка эффективности прогноза землетрясений в Камчатском регионе по комплексу ионосферных аномалий

Vestnik KRAUNC: Fiziko-Matematičeskie Nauki, 2022
Существует прямая зависимость между солнечной активностью и процессами в магнитосфере, ионосфере и литосфере Земли. Однако существует и обратная связь, определяющая влияние литосферных процессов сейсмоактивных регионов на физические процессы, протекающие
Богданов, В.В., Павлов, А.В.   +1 more
doaj   +1 more source

Bioinspired Shape‐Memory Hook Fasteners With Programmable Interlocking and Silent Release

Advanced Engineering Materials, EarlyView.
Bioinspired hook fasteners made from epoxy shape‐memory polymers are shown to switch between strong, secure attachment and gentle, silent release when heated. By combining programmable geometry and material response, these adaptive fasteners outperform commercial systems in strength and noise control, enabling new solutions for robotics, medical ...
Maria I. Vallejo Ciro, Manuel J. Carvajal Loaiza, Rahaf Homssi, Vanessa Restrepo   +3 more
wiley   +1 more source

Latest improvements for the echo sounding system of the Italian radar glaciological group and measurements in Antarctica

Annals of Geophysics, 1999
Radio echo sounding is an active remote-sensing method using electromagnetic wave penetration in a particular medium such as ice and permits the measurements of its thickness, the level of the bedrock and inhomogeneities i.e.
E. Zuccheretti, A. Zirizzotti, A. Passerini, M. Chiappini, C. Bianchi, I. E. Tabacco   +5 more
doaj   +1 more source