A5068470797- Ionosphere and magnetosphere dynamics
- Solar and Space Plasma Dynamics
- Geomagnetism and Paleomagnetism Studies
- Earthquake Detection and Analysis
- Magnetic Field Sensors Techniques
- Magnetic confinement fusion research
- Domain Adaptation and Few-Shot Learning
- Astro and Planetary Science
- Atmospheric Ozone and Climate
- Robotics and Sensor-Based Localization
- Neural dynamics and brain function
- earthquake and tectonic studies
- Spectroscopy Techniques in Biomedical and Chemical Research
- Nuclear Physics and Applications
- Transportation Safety and Impact Analysis
- Cancer-related molecular mechanisms research
- Multimodal Machine Learning Applications
- Spacecraft and Cryogenic Technologies
- Ocean Waves and Remote Sensing
- Dust and Plasma Wave Phenomena
- 3D Printing in Biomedical Research
- Methane Hydrates and Related Phenomena
- Machine Learning in Materials Science
- Topic Modeling
- Laser-induced spectroscopy and plasma
Charles River Laboratories (Netherlands)
2018
University of New Hampshire
1992-2017
The Spin-plane double probe instrument (SDP) is part of the FIELDS suite Magnetospheric Multiscale mission (MMS). Together with Axial (ADP) and Electron Drift Instrument (EDI), SDP will measure 3-D electric field an accuracy 0.5 mV/m over frequency range from DC to 100 kHz. consists 4 biased spherical probes extended on 60 m long wire booms 90∘ apart in spin plane, giving a 120 baseline for each two spin-plane components. mechanical electrical design described, together results ground tests...
The Axial Double Probe (ADP) instrument measures the DC to ∼100 kHz electric field along spin axis of Magnetospheric Multiscale (MMS) spacecraft (Burch et al., Space Sci. Rev., 2014, this issue), completing vector when combined with plane double probes (SDP) (Torbert issue, Lindqvist issue). Two cylindrical sensors are separated by over 30 m tip-to-tip, longest baseline on an axial ever attempted in space. ADP each consists two identical, 12.67 graphite coilable booms second, smaller 2.25...
The FIELDS instrumentation suite on the Magnetospheric Multiscale (MMS) mission provides comprehensive measurements of full vector magnetic and electric fields in reconnection regions investigated by MMS, including dayside magnetopause night-side magnetotail acceleration out to 25 Re. Six sensors each four MMS spacecraft provide overlapping these with sensitive cross-calibrations both before after launch. consist redundant flux-gate magnetometers (AFG DFG) over frequency range from DC 64 Hz,...
Abstract The tri-axial search-coil magnetometer (SCM) belongs to the FIELDS instrumentation suite on Magnetospheric Multiscale (MMS) mission (Torbert et al. in Space Sci. Rev. (2014), this issue). It provides three magnetic components of waves from 1 Hz 6 kHz particular key regions Earth’s magnetosphere namely subsolar region and magnetotail. plasmas being collisionless, such a measurement is crucial as electromagnetic are thought provide way ensure conversion thermal kinetic energies...
Abstract We present a statistical study of coherent structures at kinetic scales, using data from the Magnetospheric Multiscale mission in Earth’s magnetosheath. implemented multi-spacecraft partial variance increments (PVI) technique to detect these structures, which are associated with intermittency scales. examine properties electron heating occurring within such structures. find that, statistically, high PVI index regions significant heating. also focus on one structure, current sheet,...
Abstract We present Magnetospheric Multiscale (MMS) mission measurements during a full magnetopause crossing associated with an enhanced southward ion flow. A quasi‐steady magnetospheric whistler mode wave emission propagating toward the reconnection region quasi‐parallel and oblique angles is detected just before opening of magnetic field lines detection escaping energetic electrons. Its source likely perpendicular temperature anisotropy In this region, parallel currents as well Hall...
Abstract Dipolarization fronts (DFs), embedded in bursty bulk flows, play a crucial role Earth's plasma sheet dynamics because the energy input from solar wind is partly dissipated their vicinity. This dissipation form of strong low‐frequency waves that can heat and accelerate energetic electrons up to high‐latitude sheet. However, DF propagation associated magnetotail are still under debate due instrumental limitations spacecraft separation distances. In May 2015 Magnetospheric Multiscale...
Dense retrievers have demonstrated significant potential for neural information retrieval; however, they exhibit a lack of robustness to domain shifts, thereby limiting their efficacy in zero-shot settings across diverse domains. A state-of-the-art adaptation technique is Generative Pseudo Labeling (GPL). GPL uses synthetic query generation and initially mined hard negatives distill knowledge from cross-encoder dense the target domain. In this paper, we analyze documents retrieved by...
We present data from a winter 2002 sounding rocket campaign for multiple observations of mesospheric charged dust. The consisted four identically instrumented payloads carrying detectors dust particles. reached an altitude 100 km in the nighttime mesosphere and were flown Poker Flat Research Range, Alaska, conjunction with by UAF sodium iron resonance lidar system. Three flights flew sequence during course one night to study temporal evolution layers. Observations show good correlations...
Abstract Mirror mode waves are ubiquitous in the Earth's magnetosheath, particular behind quasi‐perpendicular shock. Embedded these nonlinear structures, intense lion roars often observed. Lion characterized by whistler wave packets at a frequency ∼100 Hz, which thought to be generated magnetic field minima. In this study, we make use of high time resolution instruments on board Magnetospheric MultiScale mission investigate and associated electron dynamics magnetosheath 22 January 2016. We...
Abstract We analyze two ion scale dipolarization fronts associated with field‐aligned currents detected by the Magnetospheric Multiscale mission during a large substorm on 10 August 2016. The first event corresponds to fast dawnward flow an antiparallel current and could be generated wake of previous earthward flow. It is intense lower hybrid drift waves at front propagating perpendicular phase speed close electric thermal velocity. second reversal: from southwward/dawnward...
Observations of electron and ion distributions inside a fast neutral barium jet in the ionosphere show significant fluxes within 4 km release, presumably related to beam plasma instability processes involved Critical Ionisation Velocity (CIV) effect. Electron exceeding 5 × 10 12 /cm 2 ‐str‐sec‐keV were responsible for ionizing both streaming ambient oxygen. Resulting seem be consistent with 1–2% ionization barium, as reported by optical observations, although extended spatial distribution...
Autonomous unmanned aerial vehicles (UAVs) are prime candidates for use in applications like inventory checking of large warehouses. They facilitate access to the tall racks while being agile maneuver through confined space corridors warehouse. capable carrying sensors needed perform application warehouse inspection and sustaining flight during extended periods time. While environment an industrial is well structured, it also a challenging surrounding visual odometry due reflections, moving...
In recent years, large pre-trained transformers have led to substantial gains in performance over traditional retrieval models and feedback approaches. However, these results are primarily based on the MS Marco/TREC Deep Learning Track setup, with its very particular our understanding of why how work better is fragmented at best. We analyze effective BERT-based cross-encoders versus BM25 ranking for passage task where largest been observed, investigate two main questions. On one hand, what...