Results 231 to 240 of about 12,838 (263)

Intestinal CD8+ γδ T cells shift from immune activation to suppression, with concomitant impairment of cytotoxicity as disease activity increases in patients with ulcerative colitis. [PDF]

Cent Eur J Immunol
Zhu J, Zhu T, Sheng C, Zhong T, Xu J, Cheng X, Wang J, Fu G, Jiang Z, Jiang Y.   +9 more
europepmc   +1 more source

Novel genome editing approaches to manipulate apical meristem activity for crop yield. [PDF]

Front Plant Sci
Carrasco E, Gutierrez-Marcos J.
europepmc   +1 more source

Amelioration of Metabolic Syndrome by Co-Administration of <i>Lactobacillus johnsonii</i> CRL1231 and Wheat Bran in Mice via Gut Microbiota and Metabolites Modulation. [PDF]

Metabolites
Russo M, Marquez A, Andrada E, Torres S, Santacruz A, Medina R, Gauffin-Cano P.   +6 more
europepmc   +1 more source

Melanopic equivalent daylight illuminance of 2 lx maintains and restores physiological and neurophysiological circadian rhythms in rats. [PDF]

Sci Rep
Kim S, Yu H, Choi KM, Kim J, Kim S, Eo YJ, Lee KN, Im CH, Do YR, Lee SM.   +9 more
europepmc   +1 more source

<i>Schisandra chinensis</i> Pomace Attenuates Scopolamine-Induced Cholinergic Dysfunction Associated with Changes in BDNF and JNK Signaling. [PDF]

Curr Issues Mol Biol
Yoon JH, Lim SH, Lee IS, Jang YK, Park SJ, Lee SJ, Im S, Park JH, Park H, Maeng S, Shin J.   +10 more
europepmc   +1 more source

OFDM With Interleaved Subcarrier-Index Modulation

IEEE Communications Letters, 2014
Orthogonal frequency division multiplexing with index modulation (OFDM-IM) is a recently developed technique which modulates part of the information bits using the indices of OFDM subcarriers.
Yue Xiao, Lilin Dan, Xia Lei
exaly   +2 more sources

CNN-based automatic modulation recognition for index modulation systems [PDF]

Expert Systems With Applications, 2023
Automatic modulation recognition (AMR) has garnered significant attention in both civilian and military domains, with applications ranging from spectrum sensing and cognitive radio (CR) to the deterrence of adversary communication.
Merih Leblebici, Ali Calhan, Murtaza Cicioğlu   +2 more
exaly   +3 more sources

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IM-OFDMA: A Novel Spectral Efficient Uplink Multiple Access Based on Index Modulation

IEEE Transactions on Vehicular Technology, 2019
This paper proposes a novel uplink multiple access scheme to enhance the overall spectral efficiency of wireless systems. The core idea is to exploit index modulation (IM) concept in orthogonal frequency division multiple access (OFDMA) systems. In the proposed scheme, entitled IM-OFDMA, part of the transmitted bits of each user is conventionally ...
Saud Althunibat, Raed Mesleh, Khalid A. Qaraqe   +2 more
openaire   +1 more source

Comparison of different PWM-VSI fed 3 Φ IM based on modulation index and switching frequency

2015 International Conference on Electrical, Electronics, Signals, Communication and Optimization (EESCO), 2015
The research in Pulse width modulation schemes has been intensive in the last couple of decades. PWM techniques have been used to achieve variable voltage and variable frequency in ac-dc and dc-ac converters. The inverter gives out better sinusoidal voltage and current, so the speed controls of machines are considered beneficial.
Bikram Das, Medaaibok Fancon, Prabir Ranjan Kasari, Abanishwar Chakrabarti   +3 more
openaire   +1 more source

Soft Demodulation of Time Frequency Shift Keying with Index Modulation (TFSK-IM) and Its Performance Analysis

2019 IEEE 5th International Conference on Computer and Communications (ICCC), 2019
Time-Frequency modulation is a two-dimensional modulation based on FSK and TSK, since it has strong anti-channel fading capability and its performance is far superior to FSK modulation due to its frequency diversity, time diversity and orthogonal coding error detection and error correction capabilities under the same channel conditions.
Yuan Zhang, Lei Zhao, Wenbin Guo, Shuai Rong, Feifei Wang   +4 more
openaire   +1 more source