High-temperature terahertz quantum-cascade lasers: design optimization and experimental results by D. V. Ushakov, A. A. Afonenko, I. A. Glinskiy, R. A. Khabibullin

“…To calculate electron transport in THz QCLs, we used a system of balance equations based on wave functions with reduced dipole moments of tunnel-bound states.Results. …”
Get full text

A frugal approach to hydrostatic transmission design for off-grid electricity generation from low water heads by Ruben Dario Solarte Bolaños, Antonio Carlos Valdiero, João Carlos Espíndola Ferreira, Vitor Figueredo Spiguel, Marcos Paulo Nostrani, Victor Juliano De Negri

“…When operating independently, each pump can connect to distinct energy sources (e.g., waves, wind, or biomass), enabling the development of hybrid systems for electric power generation. …”
Get full text

Remotely extinguishing flames through transient acoustic streaming using time reversal focusing of sound by Jay M. Cliftmann, Brian E. Anderson

“…Previous studies have placed the sound source near the flame or have used standing waves to reach large enough acoustic amplitudes to extinguish it. …”
Get full text

Reducing Influence of Hardware of Communication Station on Characteristics of Asymmetric Biconical Dipole Using Magneto-Dielectric Substrate on Finite-Size Metal Screen by Mikhail V. Nesterenko, Victor A. Katrich, Svetlana V. Pshenichnaya, Sergey А. Pogarsky

“…Numerical results are given for the input characteristics and radiation fields of the dipole with magneto-dielectric substrate in the case of its asymmetric feeding by a point source.…”
Get full text

Prospects of Improving the Vibroacoustic Method for Locating Buried Non-Metallic Pipelines by Vladimir Pshenin, Alexander Sleptsov, Leonid Dukhnevich

“…Under difficult soil conditions, one of the most effective methods is the vibroacoustic method, which has a maximum range of application when acoustic waves propagate through the transported medium. However, due to limited energy input into the pipeline, signal detection at significant distances from the source becomes challenging. …”
Get full text

An experimental analysis method for the incident sound field using propagation mode expansion: Study on the incident sound field in the insulation performance measurement for parti... by Yu Aida, Naohisa Inoue, Tetsuya Sakuma

“…Abstract In the measurement of the level difference between dwelling rooms, the low‐frequency modal density of the source room is not high enough for the incident sound field to be assumed as a random incidence, and the sound field is expected to be strongly influenced by the standing waves of the room modes. …”
Get full text

Energy-Aware and Reliability-Based Localization-Free Cooperative Acoustic Wireless Sensor Networks by Junaid Qadir, Ubaid Ullah, Beatriz Sainz-De-Abajo, Begona Garcia Zapirain, Goncalo Marques, Isabel de la Torre Diez

“…Also, the low speed of the acoustic waves and the small available bandwidth produce high latency as well as high transmission loss, which affects the network reliability. …”
Get full text

Design of Cyberwar Laboratory Exercises to Implement Common Security Attacks against IEEE 802.11 Wireless Networks by Mina Malekzadeh, Abdul Azim Abdul Ghani, Shamala Subramaniam

“…In wireless network communications, radio waves travel through free space; hence, the information reaches any receiving point with appropriate radio receivers. …”
Get full text

PROTECTION OF SATELLITE COMMUNICATION SYSTEMS FROM RADIO ELECTRONIC SUPPRESSION by Anatolii O. Lipatov, Yurii A. Maznychenko, Julia O. Cherkasova, Oleg E. Bondarenko

“…The use of spatial indemnification of hindrances allows to reduce their influence on 20…30 dB in a centimeter and decimeter ranges of waves, in the relative (to 50%) stripe of frequencies. …”
Get full text

Migration of Deep Low‐Frequency Tremor Triggered by Teleseismic Earthquakes in the Southwest Japan Subduction Zone by Ryo Kurihara, Kazushige Obara, Akiko Takeo, Takuto Maeda

“…Abstract Deep low‐frequency tremor triggered by teleseismic surface waves is concentrated in several locations along the ambient tremor source region in the Nankai subduction zone, southwest Japan. …”
Get full text

Features of Generation, Propagation and Application of Special Ultrasonic Impulses in Viscous Liquids by Oleg M. Gradov

“…The method of special initial-boundary conditions obtained during analyzing the hydrodynamic equations has been applied to describe the peculiarities of this nonlinear phenomenon. Waves of this type exist in the presence of two- or three-dimensional inhomogeneity of the initial disturbances and retain a spatial structure along the direction of propagation when traveling long distances. …”
Get full text

Influencing Mechanism of Detonator Location on Blasting Vibration with Electronic Initiation Technology by Junru Zhou, Dongwang Zhong, Lujun Cai, Liang Wu

“…By changing the location or increasing the number of detonators to reduce the length of subsource, the propagation path of detonation waves will be shrunk. Then the rising time of blast loading will be reduced and the rising rate will be accelerated, which lead to an increase in vibration frequency. …”
Get full text

Improving outcomes for people with autism spectrum disorders by reducing mental health problems: the IAMHealth research programme including one RCT by Emily Simonoff, Gillian Baird, Bryony Beresford, Tony Charman, Martin Knapp, Andrew Pickles, Carol Povey, Tom Purser, Paramala Santosh, Vicky Slonims, Stephen Scott

“…Work package 3: predictors Methods We followed up the QUEST cohort, a sample of 277 autistic children first assessed at age 4–9 (Wave 1) and followed up at ages 11–16 (Wave 2) and 13–18 years (Wave 3). …”
Get full text

A Brief Review on the Development Progress of High-Efficiency Klystrons by Soumaya Mandal, Ayan Kumar Bandyopadhyay, Chaitali Koley, Debasish Pal, Taha Selim Ustun, Ahmet Onen

“…The development of mathematical and computer models of beam-wave interactions in klystrons plays a pivotal role in significantly increasing the efficiency of these devices. …”
Get full text

3D Mafic Topography of the Transition Zone between the North-Western Boundary of the Congo Craton and the Kribi-Campo Sedimentary Basin from Gravity Inversion by Sévérin Nguiya, Willy Lemotio, Philippe Njandjock Nouck, Marcelin M. Pemi, Alain-Pierre K. Tokam, Evariste Ngatchou

“…For the delineation of the causative sources, the gravity anomalies have been inverted based on the Parker-Oldenburg iterative process. …”
Get full text

ДОСЛІДЖЕННЯ РОБОТИ БЕЗРОЗЖАРЮВАЛЬНОГО КАТОДУ В МАГНЕТРОНІ X-ДІАПАЗОНУ by K. Ilyenko, V.M. Gurdzhian, V.P. Dzyuba, T. Yatsenko

“…Moreover, introduction of thin foil sharp blade/knife-edge sources of FEE essentially into the A-K gap of a magnetron anode block should be done in a manner not disrupting electron cloud-anode slow-wave structure interaction resulting in production of microwave output power. …”
Get full text

Recent Advances in Understanding <i>R</i>-Process Nucleosynthesis in Metal-Poor Stars and Stellar Systems by Avrajit Bandyopadhyay, Timothy C. Beers

“…Recent advancements, such as the gravitational wave event GW170817 and detection of the <i>r</i>-process in the ejecta of its associated kilonovae, have established neutron star mergers as one of the confirmed sites. …”
Get full text

Relationship Between Rupture Length and Magnitude of Oceanic Transform Fault Earthquakes by Guilherme W. S. deMelo, Ingo Grevemeyer, Dietrich Lange, Dirk Metz, Heidrun Kopp

“…Abstract The rupture behavior of large oceanic strike‐slip earthquakes remains largely unresolved using seismic signals recorded thousands of kilometers away from the source area. Large submarine earthquakes, however, generate hydroacoustic T‐waves propagating through the ocean over long distances. …”
Get full text

NONCONVENTIONAL TECHNIQUE FOR PRODUCING HIGH MECHANICAL STRENGTH GLASS FOAM FROM GLASS WASTE by LUCIAN PAUNESCU, MARIUS FLORIN DRAGOESCU, SORIN MIRCEA AXINTE, ANA CASANDRA SEBE

“…By replacing the usual conventional energy source with a nonconventional energy (electromagnetic waves) the heating efficiency allows a fast and economical manufacturing process. …”
Get full text

Design of Ultra-Wide-Band Fourier Transform Infrared Spectrometer by Liangjie Zhi, Wei Han, Shuai Yuan, Fengkun Luo, Han Gao, Zixuan Zhang, Min Huang

“…The incident light of the spectrometer is constrained by a secondary imaging scheme, and switchable light sources and detectors are set to achieve an ultra-wide band coverage. …”
Get full text