Results 31 to 40 of about 6,531 (191)

Optomechanical time-domain reflectometry [PDF]

Nature Communications, 2018
AbstractOptical fibres constitute an exceptional sensing platform. However, standard fibres present an inherent sensing challenge: they confine light to an inner core. Consequently, distributed fibre sensors are restricted to the measurement of conditions that prevail within the core. This work presents distributed analysis of media outside unmodified,
Bashan, Gil, Diamandi, Hilel Hagai, London, Yosef, Preter, Eyal, Zadok, Avi   +4 more
openaire   +4 more sources

A Real-Time On-Orbit Signal Tracking Algorithm for GNSS Surface Observations

Remote Sensing, 2019
This manuscript describes real-time on-orbit instrument compatible open loop signal tracking techniques for Global Navigation Satellite Systems (GNSS) reflection observations.
Scott Gleason
doaj   +1 more source

Assessment of Interpolation Errors of CYGNSS Soil Moisture Estimations

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2021
High spatiotemporal soil moisture (SM) is essential for many meteorological, hydrological, and agricultural applications and studies. Spaceborne Global Navigation Satellite System-Reflectometry (GNSS-R) provides a promising opportunity for high ...
Volkan Senyurek, Ali Cafer Gurbuz, Mehmet Kurum   +2 more
doaj   +1 more source

Optoelectronic Synaptic Devices Using Molecular Telluride Phase‐Change Inks for Three‐Factor Learning

Advanced Functional Materials, EarlyView.
Optoelectronic synaptic devices based on solution‐processed molecular telluride GST‐225 phase‐change inks are demonstrated for three‐factor learning. A global optical signal broadcast through a silicon waveguide induces non‐volatile conductance updates exclusively in locally electrically flagged memristors.
Kevin Portner, Dhananjeya Kumaar, Giacomo Torti, Killian Keller, Till Zellweger, Florian M. Schenk, Christoph Weilenmann, Daniel Chelladurai, Vara Prasad Jonnalagadda, Ghazi Sarwat Syed, Vanessa Wood, Jürg Leuthold, Alexandros Emboras, Maksym Yarema, Mathieu Luisier   +14 more
wiley   +1 more source

Rethinking Extracellular Vesicle Signaling

Advanced Materials, EarlyView.
Extracellular vesicles enable cell communication beyond intracellular cargo delivery. This perspective highlights two plausible surface‐based signaling modes: “bind‐and‐stay” and “bind‐and‐leave.” Transient binding to multiple cells challenges the one‐vesicle‐one‐cell model.
Wojciech Chrzanowski, Joy Wolfram
wiley   +1 more source

Estimation and Validation Study of Soil Moisture Using GPS-IR Technique Over a Tropical Region: Variability of SM With Rainfall and Energy Fluxes

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2022
Soil Moisture (SM) data play an important role in different fields of research like hydrology, agriculture, climatology, etc. In this article, global positioning system interferometric reflectometry technique was used to estimate SM.
G. N. Madhavi, P. Sharath Kumar, R. A. Chipade, Jyoti Bhate, Tummalapalli Venkata Chandrasekhar Sarma   +4 more
doaj   +1 more source

Phonon Engineering in Ultrathin Sn Films

Advanced Materials Interfaces, EarlyView.
When embedded in multilayer structures, ultrathin Sn layers demonstrate strongly modified vibrational density of states (VDOS). This allows engineering a drastic increase of the Lamb‐Mössbauer factor fLM$f_{\text{LM}}$ and thereby of the cross‐section for coherent excitation of the ultrasharp nuclear resonance of 119Sn$^{119}{\rm Sn}$. This enables the
Sven Velten, Kai Schlage, Ilya Sergeev, Olaf Leupold, René Steinbrügge, Varimalla Raghavendra Reddy, Michael Yu Hu, Esen Ercan Alp, Lars Bocklage, Ralf Röhlsberger   +9 more
wiley   +1 more source

AI‐Optimized Vanadium Oxide Multilayers for More Than 20‐fold Enhancement in Bolometric Performance

Advanced Science, EarlyView.
Machine‐learning‐optimized WxV1‐xOy multilayer thin films with graded doping achieve a high TCR (7.3 % K−1), reduced hysteresis, and low noise under CMOS‐compatible growth conditions. This approach overcomes the long‐standing trade‐off in microbolometers between linear response and performance, offering a universal bolometric parameter greatly enhanced
Jin‐Hyun Choi, Hyoung‐Taek Lee, Jeonghoon Kim, Miju Park, Seungjoon Sun, Gye‐Hyeon Kim, Myung‐Ho Kwon, Hyeong‐Ryeol Park, Changhee Sohn   +8 more
wiley   +1 more source

An SDR-Based GNSS-R CubeSat Payload: Hardware Development and Optimization of the Onboard Processing

IEEE Access
Recent developments in high-performance Software Defined Radios (SDRs) and their utilization in CubeSat payloads are transforming Earth Observation (EO), including Microwave Radiometers, Global Navigation and Satellite System – Radio Occultations (
Shah Zahid Khan, Yasir M. O. Abbas, Edwar Edwar, Abdul-Halim Jallad, Adriano Camps   +4 more
doaj   +1 more source

Influence of Hydrogen‐Incorporation on the Bulk Electronic Structure and Chemical Bonding in Palladium

Advanced Science, EarlyView.
Hydrogen incorporation in palladium is directly probed using in situ ambient‐pressure hard X‐ray photoelectron spectroscopy under realistic, application‐relevant conditions. Correlated structural, spectroscopic, and theoretical analysis reveals how hydrogen loading modifies structure, electronic structure, and metal‐hydrogen bonding, resolving long ...
Lars J. Bannenberg, Fernando García‐Martínez, Patrick Lömker, Robin. Y. Engel, Christoph Schlueter, Herman Schreuders, Amy Navarathna, Laura. E. Ratcliff, Anna Regoutz   +8 more
wiley   +1 more source