Results 71 to 80 of about 890,943 (281)
Controlled Power Cooperative Non Orthogonal Multiple Access Relay Networks
ElectricaRecent work related to cooperative communication and power allocation has attracted much attention among researchers. This paper compares orthogonal multiple access (OMA), non orthogonal multiple access (NOMA), and cooperative NOMA.
Mario Ligwa, Vipin Balyan
doaj +1 more source
Cooperative Secret Communication with Artificial Noise in Symmetric Interference Channel
, 2010 We consider the symmetric Gaussian interference channel where two users try to enhance their secrecy rates in a cooperative manner. Artificial noise is introduced along with useful information.
Mo, Jianhua, Tao, Meixia, Zhu, Jingge
core +1 more source
Microengineered Gradient Hydrogels for Mechanobiology
Advanced Healthcare Materials, EarlyView.Gradient hydrogels are used to mimic the mechanical heterogeneity in native tissues, offering powerful in vitro platforms to study cell‐material interactions in diverse pathophysiological contexts. Here, we present a comprehensive review of the design and experimental considerations for stiffness gradient hydrogels, discussing exemplary achievements ...
Shin Wei Chong +4 more
wiley +1 more source
Cooperative Non-Orthogonal Multiple Access with Energy Harvesting
Information, 2017 In this paper, we analyze the outage probability of an amplify-and-forward (AF) cooperative non-orthogonal multiple access (NOMA) model in multi-relay multiuser networks.
Weidong Guo, Yunfeng Wang
doaj +1 more source
Joint Adaptive Modulation-Coding and Cooperative ARQ for Wireless Relay Networks
, 2008 This paper presents a cross-layer approach to jointly design adaptive modulation and coding (AMC) at the physical layer and cooperative truncated automatic repeat request (ARQ) protocol at the data link layer.
Eliasi, Behrouz +3 more
core +1 more source
Azaporphyrinoid‐Based Photo‐ and Electroactive Architectures for Advanced Functional Materials
Advanced Materials, EarlyView.A long‐standing collaboration between the Torres and Guldi groups has yielded diverse azaporphyrinoid‐based donor‐acceptor nanohybrids with promising applications in solar energy conversion. This conspectus highlights key molecular platforms and structure‐function relationships that govern light and charge management, supporting the rational design of ...
Jorge Labella +3 more
wiley +1 more source
Advanced Materials, EarlyView.Structural water is harnessed as an active co‐monomer to drive supramolecular polymerization in bulk water. Zinc(II) Salphen complexes confine water molecules to form hollow, metal–organic nanofibers that assemble into adaptive hydrogels with thermoresponsive mechanics and selective chiral recognition.
Merlin R. Stühler +10 more
wiley +1 more source
Advanced Materials, EarlyView.An overview of design principles and scalable fabrication strategies for multifunctional bio‐based packaging. Radiative cooling films, modified‐atmosphere films/membranes, active antimicrobial/antioxidant platforms, intelligent optical/electrochemical labels, and superhydrophobic surfaces are co‐engineered from material chemistry to mesoscale structure
Lei Zhang +6 more
wiley +1 more source
The Journal of Engineering, 2014 Providing secure and efficient real-time voice communication in mobile ad hoc network (MANET) environment is a challenging problem. Voice over Internet protocol (VoIP) has originally been developed over the past two decades for infrastructure-based ...
Naveed Ahmed Sheikh +3 more
doaj +1 more source
Advanced Materials, EarlyView.Catalyst coordination acts as a loaded dice biasing reaction selectivity. Single‐atom site catalysts lock intermediates in exposed configurations, enabling continued hydrogenation and favoring oxygen‐retaining products. In contrast, extended metal surfaces fully coordinate and shield reactive centers, promoting deoxygenation pathways. This work reveals
Chengyi Zhang, Ziyun Wang
wiley +1 more source