Results 61 to 70 of about 2,740 (261)
Arthritis Care &Research, EarlyView.Objective Elevated C‐reactive protein (CRP) levels in systemic sclerosis (SSc) have been linked with severe disease and worse survival, but the role of platelet levels remains unclear. This study examined whether elevated platelet levels, CRP levels, or both are associated with disease severity, progression, and survival in SSc.
Brian S. Lee +4 more
wiley +1 more source
Arctic Weather Satellite assessment and assimilation at ECMWF [PDF]
Atmospheric Measurement TechniquesThe Arctic Weather Satellite (AWS) is a ground-breaking small satellite from ESA. Its goal is to measure microwave sounding radiances of sufficient quality for improving weather forecasts from a rapidly developed, low-cost mission.
D. I. Duncan +8 more
doaj +1 more source
Advanced Engineering Materials, Volume 27, Issue 6, March 2025.ErB4 and NdB4 nanostructured powders are produced by mechanochemical synthesis. 5 h mechanical alloying and 4 M HCl acid leaching are used in the production. ErB4 and NdB4 powders exhibit maximum magnetization of 0.4726 emu g−1 accompanied with an antiferromagnetic‐to‐paramagnetic phase transition at about TN = 18 K and 0.132 emu g−1 with a maximum at ...
Burçak Boztemur +5 more
wiley +1 more source
Precoding for TDD and FDD in Measured Massive MIMO Channels
IEEE Access, 2020 This paper analyzes the performance of well-known precoding schemes for massive multiple-input multiple-output (MMIMO) systems. The investigations are based on extensive measurements made with a sounding system capable of capturing the dynamic channels ...
Jesper Odum Nielsen +5 more
doaj +1 more source
Advanced Engineering Materials, EarlyView.This article presents the NFDI‐MatWerk Ontology (MWO), a Basic Formal Ontology‐based framework for interoperable research data management in materials science and engineering (MSE). Covering consortium structures, research data management resources, services, and instruments, MWO enables semantic integration, Findable, Accessible, Interoperable, and ...
Hossein Beygi Nasrabadi +4 more
wiley +1 more source
Virtual Large-Scale Array Beamforming Analysis Using Measured Subarray Antenna Patterns
IEEE Access, 2017 An accurate and reliable massive MIMO channel model is crucial for supporting design and performance evaluation of such systems in the future. However, massive MIMO channel sounding systems are cost prohibitive and complicated, where a large number of ...
Fengchun Zhang +3 more
doaj +1 more source
, 2008 This thesis will setup and configure a channel sounding system, further it will set up a software environment for channel model extraction (characteristic of the channel) and evaluation. The motivation of the project is to set up and configure a channel sounding system based a Spectral Analyzer (Agilent E4407B), Signal Generator (Agilent E8267D ...
Iftikhar, Wajid, Raichl, Jaroslav
openaire +1 more source
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 +2 more
wiley +1 more source
Channel Measurements at 300 GHz for Low Terahertz Links in a Data Center
IEEE Open Journal of Antennas and PropagationThis article presents comprehensive double-directional channel measurements with time-domain channel sounding at 300 GHz that characterize the channel of wireless links in a data center. The channels are classified into three scenario-dependent use cases
Johannes M. Eckhardt +2 more
doaj +1 more source
Channel Characterization for 700 MHz DSRC Vehicular Communication
Journal of Electrical and Computer Engineering, 2010 Adapting OFDM for vehicular communication requires extensive knowledge of anticipated multipath and Doppler environments. We present a GPS-enabled channel sounding system built and used to conduct a channel measurement campaign.
Raffi Sevlian +4 more
doaj +1 more source