Results 61 to 70 of about 12,182 (187)

Impact of Hanks Kinase‐Dependent Phosphorylation of CodY on the Physiology and Virulence in Bacillus cereus

MicrobiologyOpen, Volume 14, Issue 6, December 2025.
CodY is a global regulator whose phosphorylation at serine 215 by PrkC/YbdM alters its DNA binding, thereby modulating gene expression and impacting motility, biofilm formation, cytotoxicity, and pathogenicity in Bacillus cereus, suggesting a conserved regulatory mechanism in Firmicutes ABSTRACT CodY acts as a key regulatory protein involved in ...
Mounia Kortebi, Céline Henry, Christophe Buisson, Christelle Lemy, Michel Gohar, Didier Lereclus, Ivan Mijakovic, Sandrine Poncet   +7 more
wiley   +1 more source

APR Reduction Technique based on OFDM Pilot Filter Bank Limiting for Satellite Mobile Communications

MATEC Web of Conferences, 2018
Combined with OFDM (Orthogonal Frequency Division Multiplexing), satellite mobile communications will effectively achieve on-demand communication in areas with an ultra-low density of users.
Dai Tianfang
doaj   +1 more source

Human tissue kallikrein 14 induces the expression of IL‐6, IL‐8, and CXCL1 in skin fibroblasts through protease‐activated receptor 1 signaling

The FEBS Journal, Volume 292, Issue 21, Page 5659-5675, November 2025.
Human tissue kallikrein 14 (KLK14), a skin protease, may mediate paracrine signaling in wound healing. KLK14 released by epithelial cells activates fibroblasts via PAR‐1 activation, inducing IL‐6, IL‐8, and CXCL1 expression. These cytokines in turn promote keratinocyte proliferation and migration, resulting in wound closure.
Laura Sasiadek, Ewa Bielecka, Katherine Falkowski, Magdalena Kulczycka, Grzegorz Bereta, Anna Maksylewicz, Natalia Zubrzycka, Ewelina Dobosz, Joanna Kozieł, Justyna Drukała, Maciej Lech, Natalia Horbach, Marcin Poręba, Klaudia Brix, Grzegorz Dubin, Jan Potempa, Tomasz Kantyka   +16 more
wiley   +1 more source

Digital Predistorter Implementation for Wideband Power Amplifiers in New Generation Wireless Systems Based on a Low‐Complexity Volterra Series Model

International Journal of Numerical Modelling: Electronic Networks, Devices and Fields, Volume 38, Issue 5, September/October 2025.
ABSTRACT In this article, we provide a novel, expanded, and adapted pruning approach for the Simplified Volterra Series (SVS) model that makes it applicable to a wider range of Power Amplifiers (PAs). The proposed Modified SVS (MSVS) model is then applied in a Digital Predistortion (DPD) architecture to linearize a 25 W Gallium Nitride (GaN) RF PA.
Haithem Rezgui, Ghalid Abib, Fatma Rouissi, Adel Ghazel   +3 more
wiley   +1 more source

Base Station-Driven PAPR Reduction Method Utilizing Null Space for MIMO-OFDM Systems With Amplify-and-Forward Relaying

IEEE Access
This paper proposes a peak-to-average power ratio (PAPR) reduction method that utilizes the null space in a multiple-input multiple-output (MIMO) channel for downlink MIMO-orthogonal frequency division multiplexing (OFDM) signals with multiple-antenna ...
Asuka Kakehashi, Takanori Hara, Kenichi Higuchi   +2 more
doaj   +1 more source

Optimization of Tone Reservation-Based PAPR Reduction for OFDM Systems [PDF]

Radioengineering, 2017
A major drawback of orthogonal frequency division multiplexing (OFDM) is its high peak-to-average power ratio (PAPR). Tone reservation (TR) is one of the numerous methods for reducing the PAPR.
B. Horvath, B. Botlik
doaj  

Creating the 5A Nursing Response Model for the Emerging Pandemic: A Qualitative, Theory‐Generating Study

Journal of Advanced Nursing, Volume 81, Issue 9, Page 6011-6021, September 2025.
ABSTRACT Aim The aim of this qualitative exploratory study aimed was to explore how nurses experienced and responded to the COVID‐19 pandemic crisis in clinical settings to develop a response model. Design Focus group interviews. Methods Thirteen focus group interviews (n = 50) with nurses and nurse leaders practicing in diverse clinical settings were ...
Dahae Rim, Hyunsook Shin, Hyejin Jeon, Young‐Me Lee, Soonyoung Shon, Kaka Shim, Kyung Mi Kim, Shannon D. Simonovich   +7 more
wiley   +1 more source

A Polar-Coded PAPR Reduction Scheme Based On Hybrid Index Modulation

IEEE Open Journal of the Communications Society
Orthogonal frequency division multiplexing with index modulation (OFDM-IM) is a promising technique for next-generation wireless communications due to its superior error performance and flexibility.
Si-Yu Zhang, Xinwei Yue, Behnam Shahrrava, Yuexia Zhang, Gongpu Wang   +4 more
doaj   +1 more source

Performance Analysis of MIMO Links With Non‐Isolated Active Antenna Arrays

Microwave and Optical Technology Letters, Volume 67, Issue 8, August 2025.
ABSTRACT In this paper, we analyze the performance of non‐isolated active arrays in a multiple‐input multiple‐output (MIMO) system. When ferromagnetic‐type isolators are removed in the transmitter (Tx) chains, the antenna mutual coupling will dynamically change the load impedance seen by the power amplifiers (PAs) at their outputs, which subsequently ...
Jiayu Hou, Haijun Fan, Yuan Ding, George Goussetis   +3 more
wiley   +1 more source

New SLM scheme to reduce the PAPR of OFDM signals using a genetic algorithm

ICT Express, 2016
Selected mapping (SLM) is a popular peak-to-average power ratio (PAPR) reduction technique suitable for use in orthogonal frequency division multiplexing (OFDM) systems as it achieves good PAPR reduction performance without signal distortion.
Insoo Sohn
doaj   +1 more source