Results 21 to 30 of about 17,407,057 (195)

Research on Dynamic Beamforming Methods for Uniform Circular Frequency Diverse Array Sonar

Journal of Marine Science and Engineering
Frequency diverse array (FDA) sonar achieves a range- and azimuth-dependent transmit beam by applying a small frequency increment to each transmitting element.
Weiye Liu, Yixin Yang
doaj   +1 more source

Beyond NPK: Mineral Nutrient-Mediated Modulation in Orchestrating Flowering Time

Plants, 2023
Flowering time in plants is a complex process regulated by environmental conditions such as photoperiod and temperature, as well as nutrient conditions.
Sang Eun Jun, Jae Sun Shim, Hee Jin Park
doaj   +1 more source

Fast OTA Diagnosis of RIS Using Only Harmonic Amplitude Introduced by Time Modulation

IEEE Open Journal of Antennas and Propagation
The electromagnetic wave manipulation capability of reconfigurable intelligent surfaces (RISs) critically depends on the proper functioning of the unit cells. However, unit failures may occur during RIS fabrication, transportation, or deployment.
Shiyuan Li, Jie Tian, Baojiang Yan, Weiren Zhu, Chong He   +4 more
doaj   +1 more source

Ultrasonic Signal Time-Expansion Using DAC Frequency Modulation

Vibration, 2023
Ultrasonic signals can be conveniently recorded using modern high-speed analog-to-digital converters and analyzed through digital signal processing algorithms.
Massimiliano Rossi, Marco Frasca
doaj   +1 more source

Beampattern Synthesis for Frequency Diverse Array Based on Time-Modulated Double Parameters Approach

Journal of Microwaves, Optoelectronics and Electromagnetic Applications
The basic frequency diverse array (FDA) using linearly increasing frequency increments generates a range-angle dependent beampattern. However, it is coupled in range and angle dimensions and is also periodic in range and time, making its applications ...
Tong Mu, Yaoliang Song, Zhonghan Wang
doaj   +1 more source

Classical Complement Pathway Inhibition in a Pediatric Patient With Refractory Immune Thrombocytopenia

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Pediatric refractory immune thrombocytopenia (rITP) is generally characterized by persistent thrombocytopenia and failure to achieve a sustained response to multiple standard therapies. We report a 4‐year‐old female with congenital tufting enteropathy, post‐intestinal transplant patient on immunosuppressants, who developed severe rITP ...
Sarah Hsieh, Susmita Sarangi, Caileigh Pudela, Catherine M. Broome, Tara K. Suntum   +4 more
wiley   +1 more source

Single-channel amplitude-comparison wideband direction finding method with nonuniform time modulation

Zhongguo Jianchuan Yanjiu
ObjectiveTo overcome the problem of the limitation of working bandwidth due to the phase ambiguity caused by the carrier frequency's variation in conventional time-modulated direction finding, a single-channel direction finding method with nonuniform ...
Dapeng BIAN, Xiaonan ZHAO, Zhenji LIU, Jingfeng CHEN, Ronghong JIN   +4 more
doaj   +1 more source

Time Reversal Acoustic Communication Using Filtered Multitone Modulation

Sensors, 2015
The multipath spread in underwater acoustic channels is severe and, therefore, when the symbol rate of the time reversal (TR) acoustic communication using single-carrier (SC) modulation is high, the large intersymbol interference (ISI) span caused by ...
Lin Sun, Baowei Chen, Haisen Li, Tian Zhou, Ruo Li   +4 more
doaj   +1 more source

Abatacept for Prophylaxis of Acute and Chronic Graft‐Versus‐Host‐Disease in Children Undergoing Allogeneic Hematopoietic Stem Cell Transplantation—A Systematic Review and Meta‐Analysis of Cohort Studies

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Background Graft‐versus‐host disease (GvHD) remains one of the most significant complications of hematopoietic stem cell transplantation (HSCT). Abatacept, a selective T‐cell costimulation modulator, is a relatively novel prophylactic agent, though pediatric data remain limited.
Matthijs D. Kruizinga, Anne B. Verbeek, Caroline A. Lindemans, Emilie P. Buddingh   +3 more
wiley   +1 more source

Gut microbiome and aging—A dynamic interplay of microbes, metabolites, and the immune system

FEBS Letters, EarlyView.
Age‐dependent shifts in microbial communities engender shifts in microbial metabolite profiles. These in turn drive shifts in barrier surface permeability of the gut and brain and induce immune activation. When paired with preexisting age‐related chronic inflammation this increases the risk of neuroinflammation and neurodegenerative diseases.
Aaron Mehl, Eran Blacher
wiley   +1 more source