Earthquake Directivity, Orientation, and Stress Drop Within the Subducting Plate at the Hikurangi Margin, New Zealand: Directivity of New Zealand Earthquakes
Sign Up to like & getrecommendations! Published in 2017 at "Journal of Geophysical Research"
DOI: 10.1002/2017jb014935
Abstract: We develop an approach to calculate earthquake source directivity and rupture velocity for small earthquakes, using the whole source time function rather than just an estimate of the duration. We apply themethod to an aftershock… read more here.
Keywords: new zealand; stress drop; rupture; directivity ... See more keywords
An improved gain and directivity design of an antipodal Vivaldi antenna for ultra‐wideband detection
Sign Up to like & getrecommendations! Published in 2024 at "Microwave and Optical Technology Letters"
DOI: 10.1002/mop.34090
Abstract: A novel antipodal Vivaldi antenna (AVA) is proposed to achieve improved gain and directivity. To enhance the bandwidth of the antenna, a series of equal‐sized slots are etched onto the patch surface. Additionally, a dielectric… read more here.
Keywords: detection; directivity; improved gain; antipodal vivaldi ... See more keywords
An empirical approach of accounting for the amplification effects induced by near-fault directivity
Sign Up to like & getrecommendations! Published in 2017 at "Bulletin of Earthquake Engineering"
DOI: 10.1007/s10518-017-0275-7
Abstract: How to incorporate near-fault directivity effect into the ground motion prediction equations (GMPEs) is an active research topic in recent years. Many studies demonstrated that the directivity could amplify the spectral accelerations (Sa) in a… read more here.
Keywords: amplification effects; ground; directivity; near fault ... See more keywords
Accounting for directivity-induced pulse-like ground motions in building portfolio loss assessment
Sign Up to like & getrecommendations! Published in 2020 at "Bulletin of Earthquake Engineering"
DOI: 10.1007/s10518-020-00950-9
Abstract: Earthquake-induced pulse-like ground motions are often observed in near-source conditions due to forward-directivity. Recent worldwide earthquakes have emphasised the severe damage potential of such pulse-like ground motions. This paper introduces a framework to quantify the… read more here.
Keywords: directivity; ground motions; pulse like; like ground ... See more keywords
Evidence of directivity during the earthquakes of 8 and 10 May 2014 (Mw 6.5, 6.1) in the Guerrero, Mexico seismic gap and some implications
Sign Up to like & getrecommendations! Published in 2019 at "Journal of Seismology"
DOI: 10.1007/s10950-019-09829-y
Abstract: We report on rupture directivity during 8 and 10 May 2014 earthquakes (Mw 6.5, 6.1), which occurred on the Mexican subduction thrust in the Guerrero seismic gap. The two events were located near each other… read more here.
Keywords: gap; may 2014; seismic gap; ground ... See more keywords
Effect of Yagi–Uda nano-antenna element shape on the directivity and radiation efficiency
Sign Up to like & getrecommendations! Published in 2019 at "Optical and Quantum Electronics"
DOI: 10.1007/s11082-019-1774-3
Abstract: In this paper, different optimal designs of Yagi–Uda nano-antennas (NAs) are introduced and analyzed based on different element shapes to maximize the directivity and radiation efficiency. The studied element shapes include triangular, hexagonal, cube, square,… read more here.
Keywords: radiation efficiency; yagi uda; directivity radiation; directivity ... See more keywords
Directivity based control of acoustic radiation
Sign Up to like & getrecommendations! Published in 2019 at "Applied Acoustics"
DOI: 10.1016/j.apacoust.2019.04.031
Abstract: Abstract A novel concept of local noise control along specific receiver directions is demonstrated by controlling the directivity of the radiated noise. This method is particularly useful for practical low frequency noise where global noise… read more here.
Keywords: control; mass; directivity; acoustic radiation ... See more keywords
The effect on vowel directivity patterns of higher order propagation modes
Sign Up to like & getrecommendations! Published in 2018 at "Journal of Sound and Vibration"
DOI: 10.1016/j.jsv.2018.06.053
Abstract: Abstract Measurements of speech directivity patterns show that it differs according to the phoneme pronounced. In the case of the vowels, these differences can be attributed to variations of the vocal tract shape. The multimodal… read more here.
Keywords: order; vowel; directivity; directivity patterns ... See more keywords
RSS-Based Cooperative Localization and Orientation Estimation Exploiting Antenna Directivity
Sign Up to like & getrecommendations! Published in 2021 at "IEEE Access"
DOI: 10.1109/access.2021.3070441
Abstract: In this paper, we propose a factor-graph-based cooperative positioning algorithm that uses RSS radio measurements and accounts for the directivity of the antennas. This is achieved by modeling the directivity with a parametric antenna pattern… read more here.
Keywords: based cooperative; orientation; rss based; directivity ... See more keywords
Phase Correcting Miniature Convoluted FSS in a Fabry–Perot Cavity Antenna
Sign Up to like & getrecommendations! Published in 2025 at "IEEE Access"
DOI: 10.1109/access.2025.3631685
Abstract: This paper presents various designs for enhancing the radiation performance of a conventional Fabry-Perot cavity antenna (FPCA) by improving its aperture phase distribution using miniaturised convoluted frequency selective surfaces (FSS). The FSS behaves as a… read more here.
Keywords: fpca; directivity; prs; base ... See more keywords
Multibeam Directivity Maximization for Overlapped Subarrayed Array via Alternate Convex Programming
Sign Up to like & getrecommendations! Published in 2024 at "IEEE Antennas and Wireless Propagation Letters"
DOI: 10.1109/lawp.2024.3414197
Abstract: The synthesis of an overlapped phased array with low sidelobe levels and high multibeam directivity is addressed using alternate convex programming. First, the beamforming and directivity expressions for the overlapped subarray are derived by defining… read more here.
Keywords: alternate convex; multibeam directivity; directivity; convex programming ... See more keywords