Results 91 to 100 of about 63,188 (310)

Improvement of GPSR Protocol in Vehicular Ad Hoc Network

open access: yesIEEE Access, 2018
In a vehicular ad hoc network (VANET), vehicles always move in high-speed which may cause the network topology changes frequently. This is challenging for routing protocols of VANET.
Xiaoping Yang   +3 more
doaj   +1 more source

Network emulation focusing on QoS-Oriented satellite communication [PDF]

open access: yes, 2007
This chapter proposes network emulation basics and a complete case study of QoS-oriented Satellite ...
Dairaine, Laurent   +2 more
core  

Vision‐Augmented Wearable Interfaces: Bioinspired Approaches for Realistic AI‐Human‐Machine Interaction

open access: yesAdvanced Materials Technologies, EarlyView.
This review presents recent progress in vision‐augmented wearable interfaces that combine artificial vision, soft wearable sensors, and exoskeletal robots. Inspired by biological visual systems, these technologies enable multimodal perception and intelligent human–machine interaction.
Jihun Lee   +4 more
wiley   +1 more source

Stretchable and Strain‐Tolerant Gold‐Coated Fibrous Biosensor for Superoxide Anion Monitoring

open access: yesAdvanced Materials Technologies, EarlyView.
A breathable, stretchable gold nanomesh–TPU fiber platform is developed via controlled electroless deposition, enabling uniform through‐thickness conductivity while preserving porosity. Functionalized with superoxide dismutase, the system achieves selective, real‐time electrochemical detection of superoxide with high sensitivity, mechanical durability,
Jafar M. Batayneh, Ahyeon Koh
wiley   +1 more source

Architecture and Features of Mobile Communication Satellite System for Mobile Phone

open access: yes天地一体化信息网络, 2023
The development and construction of mobile communication satellite systems for individual users worldwide have been ongoing for over thirty years, and the technological level and industrial scale of satellite mobile communication are constantly maturing ...
Dong CHEN   +3 more
doaj   +2 more sources

Sky visibility analysis under urban networks: A stochastic geometry approach

open access: yesICT Express
We propose a novel framework to analyze a ground user’s sky visibility in an urban outdoor network. In order to measure the user’s sky visibility, the point process theory is used to represent buildings of urban outdoor networks. We characterize the line-
Heejung Yu   +3 more
doaj   +1 more source

Large Faraday Rotation in Liquid Crystals With Embedded Paramagnetic Ions (Cu2+, VO2+) at Room Temperature

open access: yesAdvanced Optical Materials, EarlyView.
Large Faraday rotation at room temperature is observed in thin films of discotic copper (Cu2+: 3d9) and vanadyl (VO2+: 3d1) enaminoketone complexes. The large Verdet constant originates from a high density of paramagnetic centers, metal‐ligand p−d hybridization and π orbitals involved in optical transitions (identified by DFT calculations), as well as ...
Karolina Łempicka‐Mirek   +8 more
wiley   +1 more source

2-Bit reconfigurable microstrip antenna with independently controlled hybrid slots for polarization and frequency switching

open access: yesScientific Reports
A 2-bit reconfigurable microstrip antenna capable of selectively switching its operating frequency and polarization is presented. The design features a novel dual-embedded, crossed-slot topology where slots on the radiating patch and the ground plane are
Dong-Hyo Lee   +3 more
doaj   +1 more source

IP based multimedia conference over satellite

open access: yes, 2020
Significant research and development have been carried out recently in Voice over IP (VoIP) to integrate Internet data services and telephony services based on Public Switched Telephone Network (PSTN).
Liang, L   +4 more
core  

Exciton Radiative Lifetimes in Hexagonal Diamond Ge and SixGe1–x Alloys

open access: yesAdvanced Optical Materials, EarlyView.
Strong room‐temperature photoluminescence reported in hexagonal Ge conflicts with theory predicting a nearly dark band edge. First‐principles calculations of excitonic radiative lifetimes fill a key gap in this debate, showing that pristine hexagonal Ge remains intrinsically weakly emissive, while Si alloying only modestly shortens the lifetime and ...
Michele Re Fiorentin   +2 more
wiley   +1 more source

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