Results 41 to 50 of about 2,722 (251)

Opportunities of Semiconducting Oxide Nanostructures as Advanced Luminescent Materials in Photonics

Advanced Materials, EarlyView.
The review discusses the challenges of wide and ultrawide bandgap semiconducting oxides as a suitable material platform for photonics. They offer great versatility in terms of tuning microstructure, native defects, doping, anisotropy, and micro‐ and nano‐structuring. The review focuses on their light emission, light‐confinement in optical cavities, and
Ana Cremades, Pedro Hidalgo, David Maestre, Ruth Martínez‐Casado, Emilio Nogales, Beatriz Rodríguez, G. Cristian Vásquez, Bianchi Méndez   +7 more
wiley   +1 more source

Covert underwater acoustic communications

The Journal of the Acoustical Society of America, 2010
Low probability of detection (LPD) communications are conducted at a low received signal-to-noise ratio (SNR) to deter eavesdroppers to sense the presence of the transmitted signal. Successful detection at intended receiver heavily relies on the processing gain achieved by employing the direct-sequence spread-spectrum (DSSS) technique.
Jun Ling, Hao He, Jian Li, William Roberts, Petre Stoica   +4 more
openaire   +2 more sources

Electrical Resistivity Change Upon Crystallization as a Robust Descriptor for Metallic Glass Forming Ability

Advanced Materials, EarlyView.
Electrical resistivity change upon annealing is introduced as a rapid descriptor for identifying high glass‐forming ability in metallic glasses. High‐throughput combinatorial thin‐film libraries reveal that compositions exhibiting small resistivity changes correspond to sluggish crystallization behavior and known bulk metallic glass regions, enabling ...
Haechan Jo, Hongxi Duan, Mingxing Li, Liwei Hu, Yanhui Liu, Dongwoo Lee   +5 more
wiley   +1 more source

Entanglement Assisted LPI and Covert Communications With SLM-Based Beam Steering Over Turbulent Optical Channels

IEEE Access
In secure communications, the primary focus is on safeguarding the content of the message. In contrast, low probability of intercept (LPI) communications prioritize the privacy of the communication process itself.
Ivan B. Djordjevic, Ignacio A. Rojas
doaj   +1 more source

Performance Analysis for UAV-Jammer Aided Covert Communication

IEEE Access, 2020
This paper investigates the performance analysis for a novel covert communication system, where a friendly UAV-jammer is used to protect the covert transmission from Alice to Bob against the eavesdropping from Dave.
Wei Liang, Jia Shi, Zhuangzhuang Tie, Fucheng Yang   +3 more
doaj   +1 more source

Covert communications on renewal packet channels [PDF]

2016 54th Annual Allerton Conference on Communication, Control, and Computing (Allerton), 2016
Contains details of an Allerton 2016 submission arXiv:1610 ...
Ramin Soltani, Dennis Goeckel, Don Towsley, Amir Houmansadr   +3 more
openaire   +2 more sources

Biodegradable Wireless Soil Urea Sensor Using Metamaterial Perfect Absorber for Distributed Deployment in Precision Agriculture

Advanced Materials Technologies, EarlyView.
In this study, we propose a biodegradable wireless soil urea sensor for precision agriculture. The sensor's electromagnetic response varies depending on the urea concentration, allowing the measurement of relative soil urea concentrations by analyzing the time‐transient electromagnetic response.
Yu Tanaami, Ken Sakabe, Tetsuya Yarimizo, Yasutaka Murakami, Tetsuo Kan, Hiroaki Onoe   +5 more
wiley   +1 more source

Detecting hidden communication threats in cloud systems using advanced pattern and threat propagation analysis

Journal of Cloud Computing: Advances, Systems and Applications
Cloud environments enable scalable multi-tenant computing but introduce security risks like covert channels, making their detection and classification essential for maintaining cloud security.
Gavini Sreelatha, Tan Kuan Tak, Rajkumar Kalimuthu, Pravin R. Kshirsagar, Balajee Maram, T. Venkatakrishnamoorthy   +5 more
doaj   +1 more source

Adversarial Attack for Deep Steganography Based on Surrogate Training and Knowledge Diffusion

Applied Sciences, 2023
Deep steganography (DS), using neural networks to hide one image in another, has performed well in terms of invisibility, embedding capacity, etc. Current steganalysis methods for DS can only detect or remove secret images hidden in natural images and ...
Fangjian Tao, Chunjie Cao, Hong Li, Binghui Zou, Longjuan Wang, Jingzhang Sun   +5 more
doaj   +1 more source

Extrusion Bioprinting for Wound Healing: Innovations in Functionalized Bioinks and Bioprinting Technology

Advanced Materials Technologies, EarlyView.
Extrusion‐based bioprinting (EBB) has emerged as a versatile biofabrication platform capable of precisely depositing bioinks composed of biomaterials, cells, and bioactive agents to generate patient‐specific, biomimetic skin constructs. This paper presents a state‐of‐the‐art and forward‐looking overview of EBB for wound healing, encompassing printing ...
Hien‐Phuong Le, Anh Tuan Trong Tran, Ammara Waheed, Tran Thanh Tung, Dusan Losic   +4 more
wiley   +1 more source