Results 31 to 40 of about 210,822 (303)

Structural instability impairs function of the UDP‐xylose synthase 1 Ile181Asn variant associated with short‐stature genetic syndrome in humans

FEBS Letters, EarlyView.
The Ile181Asn variant of human UDP‐xylose synthase (hUXS1), associated with a short‐stature genetic syndrome, has previously been reported as inactive. Our findings demonstrate that Ile181Asn‐hUXS1 retains catalytic activity similar to the wild‐type but exhibits reduced stability, a looser oligomeric state, and an increased tendency to precipitate ...
Tuo Li, Pedro A. Sánchez‐Murcia, Bernd Nidetzky   +2 more
wiley   +1 more source

Inverse Synthetic Aperture Radar Imaging of Space Objects Using Probing Signal with a Zero Autocorrelation Zone

Signals
To obtain radar images of a group of small space objects or to resolve individual elements of complex space objects in near-Earth orbit, a radar system must have high spatial resolution.
Roman N. Ipanov, Aleksey A. Komarov
doaj   +1 more source

A Broadband Planar Spiral Antenna Design for Electromagnetic Signal Monitoring

IEEE Access, 2020
In order to meet the wide-band full-space radio monitoring task, the design of a circular-polarized planar dual-arm composite spiral antenna is presented in this paper.
Daifu Chen, Hongxin Zhang, Jun Xu
doaj   +1 more source

DSS-13 26-meter antenna upgraded radiometer system [PDF]

, 1992
The Deep Space Station (DSS)-13 26-m antenna radiometer system was upgraded with an IBM-compatible computer-controlled configuration with improved supporting hardware and software.
Bury, G., Skjerve, L., Stelzried, C. T.
core   +1 more source

Polarization‐resolved femtosecond Vis/IR spectroscopy tailored for resolving weak signals in biological samples using minimal sample volume

FEBS Open Bio, EarlyView.
Unique biological samples, such as site‐specific mutant proteins, are available only in limited quantities. Here, we present a polarization‐resolved transient infrared spectroscopy setup with referencing to improve signal‐to‐noise tailored towards tracing small signals. We provide an overview of characterizing the excitation conditions for polarization‐
Clark Zahn, Karsten Heyne
wiley   +1 more source

Dual-Fed DRA Subarrays Featuring Versatile Polarization Reconfigurability With High Port Isolation and Suppressed Cross-Polar Radiations

IEEE Open Journal of Antennas and Propagation
near square Dielectric Resonator Antenna (DRA) geometry with dual-aperture feeding has been explored. This aims in achieving a number of attractive features from a standalone unit as well as a 4-element subarray.
Satyajit Chakrabarti, Debatosh Guha
doaj   +1 more source

Analysis of integrated UWB MIMO and CR antenna system using transmission line model with functional verification

Scientific Reports, 2022
This paper discusses the equivalent circuit model and functional verification of an integrated antenna system as its main focus. The integrated antenna system consists of two independent antenna systems, namely the Cognitive Radio antenna and the Ultra ...
P. Prabhu, Malarvizhi Subramani, Kyung-sup Kwak   +2 more
doaj   +1 more source

Antenna Performance Analysis for Decameter Solar Radio Observations

, 2011
Decameter wavelength radio emission is finely structured in solar bursts. For their research it is very important to use a sufficient sensitivity of antenna systems.
Abranin, Braude, Cane, Chernov, Dulk, Erickson, Joardar, Konovalenko, Krymkin, Mann, Manning, Mel'nik, Mel'nik, Mel'nik, Prestage, Takahashi   +15 more
core   +1 more source

A Q‐Learning Algorithm to Solve the Two‐Player Zero‐Sum Game Problem for Nonlinear Systems

International Journal of Adaptive Control and Signal Processing, Volume 39, Issue 3, Page 566-581, March 2025.
A Q‐learning algorithm to solve the two‐player zero‐sum game problem for nonlinear systems. ABSTRACT This paper deals with the two‐player zero‐sum game problem, which is a bounded L2$$ {L}_2 $$‐gain robust control problem. Finding an analytical solution to the complex Hamilton‐Jacobi‐Issacs (HJI) equation is a challenging task.
Afreen Islam, Anthony Siming Chen, Guido Herrmann   +2 more
wiley   +1 more source

CREATING THE RT-32 RADIO TELESCOPE ON THE BASIC OF MARK-4B ANTENNA SYSTEM. 2. ESTIMATION OF THE POSSIBILITY FOR MAKING SPECTRAL OBSERVATIONS OF RADIO ASTRONOMICAL OBJECTS

Radio Physics and Radio Astronomy, 2019
Purpose: Technical capabilities of the MARK-4B antenna system necessary for its further using as a 32-meter radiotelescope (RT-32) and making simultaneous spectral radioastronomical observations in the C and K frequency ranges, are investigated ...
A. V. Antyufeyev, A. M. Korolev, O. M. Patoka, V. M. Shulga, O. M. Ulyanov, O. M. Reznichenko, V. V. Zakharenko, V. I. Prisiazhnii, A. V. Poichalo, V. V. Voityuk, V. N. Mamarev, V. V. Ozhinskii, V. P. Vlasenko, V. M. Chmil, V. I. Lebed, M. I. Palamar, A. V. Chaikovskii, Yu. V. Pasternak, M. A. Strembitskii, M. P. Natarov, S. O. Steshenko, V. V. Glamazdyn, A. S. Shubny, A. A. Kirilenko, D. Y. Kulik, A. M. Pylypenko   +25 more
doaj   +1 more source