Results 31 to 40 of about 535,922 (281)
Revealing the structure of land plant photosystem II: the journey from negative‐stain EM to cryo‐EM
FEBS Letters, EarlyView.Advances in cryo‐EM have revealed the detailed structure of Photosystem II, a key protein complex driving photosynthesis. This review traces the journey from early low‐resolution images to high‐resolution models, highlighting how these discoveries deepen our understanding of light harvesting and energy conversion in plants.
Roman Kouřil
wiley +1 more source
, 2010 In cognitive radio, spectrum sensing is a key component to detect spectrum holes (i.e., channels not used by any primary users). Collaborative spectrum sensing among the cognitive radio nodes is expected to improve the ability of checking complete ...
Han, Zhu +5 more
core +1 more source
Bayesian compressive sensing framework for spectrum reconstruction in Rayleigh fading channels [PDF]
, 2016 Compressive sensing (CS) is a novel digital signal processing technique that has found great interest in many applications including communication theory and wireless communications.
Ghafoor, Abdul +3 more
core +1 more source
Reciprocal control of viral infection and phosphoinositide dynamics
FEBS Letters, EarlyView.Phosphoinositides, although scarce, regulate key cellular processes, including membrane dynamics and signaling. Viruses exploit these lipids to support their entry, replication, assembly, and egress. The central role of phosphoinositides in infection highlights phosphoinositide metabolism as a promising antiviral target.
Marie Déborah Bancilhon, Bruno Mesmin
wiley +1 more source
The Impact of Sensing Range on Spatial-Temporal Opportunity [PDF]
, 2013 In this paper, we study the impact of secondary user (SU) sensing range on spectrum access opportunity in cognitive radio networks. We first derive a closed-form ex- pression of spectrum access opportunity by taking into ac- count the random variations ...
Li, X., Yun, Z., Zhang, X.
core +1 more source
Throughput and Collision Analysis of Multi-Channel Multi-Stage Spectrum Sensing Algorithms
, 2011 Multi-stage sensing is a novel concept that refers to a general class of spectrum sensing algorithms that divide the sensing process into a number of sequential stages.
Gabran, Wesam +2 more
core +1 more source
Power-Optimal Feedback-Based Random Spectrum Access for an Energy Harvesting Cognitive User [PDF]
, 2014 In this paper, we study and analyze cognitive radio networks in which secondary users (SUs) are equipped with Energy Harvesting (EH) capability. We design a random spectrum sensing and access protocol for the SU that exploits the primary link's feedback ...
Ashour, Mahmoud +3 more
core +1 more source
FEBS Letters, EarlyView.Fluorescent probes allow dynamic visualization of phosphoinositides in living cells (left), whereas mass spectrometry provides high‐sensitivity, isomer‐resolved quantitation (right). Their synergistic use captures complementary aspects of lipid signaling. This review illustrates how these approaches reveal the spatiotemporal regulation and quantitative
Hiroaki Kajiho +3 more
wiley +1 more source
Investment and Pricing with Spectrum Uncertainty: A Cognitive Operator's Perspective
, 2010 This paper studies the optimal investment and pricing decisions of a cognitive mobile virtual network operator (C-MVNO) under spectrum supply uncertainty.
Duan, Lingjie +2 more
core +1 more source
Cooperative wideband spectrum sensing with multi-bit hard decision in cognitive radio [PDF]
, 2013 Cognitive radio offers an increasingly attractive solution to overcome the underutilization problem. A sensor network based cooperative wideband spectrum sensing is proposed in this paper. The purpose of the sensor network is to determine the frequencies
Ammar, M. +4 more
core +1 more source