-
581
Cognitive Multihop Wireless Sensor Networks over Nakagami- Fading Channels
Published 2014-08-01“…We also conclude that, for secondary nodes whose transmit power is restricted by the interference constraint of the primary user, increasing the number of relaying hops is an effective way to improve their transmission performance. …”
Get full text
Article -
582
Conductive filament formation in the failure of Hf0.5Zr0.5O2 ferroelectric capacitors
Published 2025-01-01“…In this work, dielectric failure due to repeated switching cycles, occurring through oxygen vacancy motion and leading to the formation of a conductive filament, is demonstrated. A field modified hopping barrier of ∼150–400 meV is observed, indicating a vacancy charge of 0.4–0.6e markedly different from the charge states predicted in the literature. …”
Get full text
Article -
583
Fluorescence, Decay Time, and Structural Change of Laser Dye Cresyl Violet in Solution due to Microwave Irradiation at GSM 900/1800 Mobile Phone Frequencies
Published 2012-01-01“…We found that the fluorescence quantum yield was increased from to due to intramolecular energy hopping of cresyl violet in solution which is exposed to microwave irradiation at mobile phone frequencies, and the photonic product cannot be used as a laser dye anymore.…”
Get full text
Article -
584
An Energy-Efficient MAC Protocol Employing Dynamic Threshold for Wireless Sensor Networks
Published 2012-10-01“…Here the packets are stored in the buffer, and then transmitted when the number of packets in the buffer exceeds the threshold dynamically decided according to the number of hops of the node from the source in the path of packet forwarding. …”
Get full text
Article -
585
Magnetic and Electric Properties of , () Layered Perovskites
Published 2013-01-01“…The temperature dependence of the electrical resistivity, , was described by two-dimensional variable range hopping (2D-VRH) model at 50 K < ≤ 300 K. Comparison with other layered perovskites was discussed in this work.…”
Get full text
Article -
586
A Novel Algorithm for Defending Path-Based Denial of Service Attacks in Sensor Networks
Published 2010-12-01“…If checking integrity and authenticity of a message is done only at the final destination, the intermediate nodes are going to forward bogus packets injected by an adversary many hops before they are detected. Therefore, the adversary can easily overwhelm intermediate nodes by bogus or replayed packets. …”
Get full text
Article -
587
Link Layer Time-Varying Model for IEEE 802.15.4 Radio in Industrial Environment
Published 2014-12-01“…In industrial environments, link reliability is vulnerable to various interferences; therefore, many schemes have been employed for reliability improvements such as multichannel access, frequency hopping, and multipath routing, which put forward the demand on link reliability models. …”
Get full text
Article -
588
Performance analysis of 60 GHz pulse multiuser communication system based on cross-layer strategy
Published 2018-09-01“…Due to the advantages of license-free,strong directionality,high system capacity,and high transmission rate of Gbit/s,60 GHz band is listed as one of the candidate bands for new radios (new radio).In 5G ultra-dense networking scenario,the randomness of node switching caused by the decrease of the distance between network nodes may cause severe multiple access interference and resource mismatch problems.In this regard,based on the concept of cross-layer collaborative design,a resource scheduling strategy based on fairness was proposed.The multiple access performance of the strategy was simulated in a 60 GHz pulsed wireless communication system based on TH-PAM (time hopping pulse amplitude modulation).Simulation results show that compared with the system with pure physical layer optimization algorithm,the multiple access system which adopts this strategy shows stronger fairness and lower system error rate,but it needs increase the transmission power to meet the requirements of the coverage of the equivalent communication system.That is,there is a certain trade-off between the energy and fairness of the system,which can be used to guide the structure and deployment of the actual communication system.…”
Get full text
Article -
589
An Efficient Prediction-Based Data Forwarding Strategy in Vehicular Ad Hoc Network
Published 2015-08-01“…It can be used to optimize packet routing and minimize number of hops especially in the high-density VANETs. Finally, we evaluate the performance of the proposed forwarding strategy through simulation confirming its feasibility and effectiveness.…”
Get full text
Article -
590
A Game-Theoretic Response Strategy for Coordinator Attack in Wireless Sensor Networks
Published 2014-01-01“…In this paper, we propose an adaptive coordinator selection algorithm using game and fuzzy logic aiming at both minimizing the average number of hops and maximizing network lifetime. The proposed game model consists of two interrelated formulations: a stochastic game for dynamic defense and a best response policy using evolutionary game formulation for coordinator selection. …”
Get full text
Article -
591
Evaluating the effectiveness of prompt engineering for knowledge graph question answering
Published 2025-01-01“…Across the various prompting frameworks used, the commercial model is unable to achieve a score over 51%, indicating that KGQA, especially for complex queries, with multiple hops, set operations and filters remains a challenging task for LLMs. …”
Get full text
Article -
592
Investigation of a CDDW Hamiltonian to Explore Possibility of Magneto-Quantum Oscillations in Electronic Specific Heat of Hole-Doped Cuprates
Published 2010-01-01“…For ́𝜀=0, with the chemical potential 𝜇=−0.27 eV for 10% doping level and |𝑣0|≥|𝑡| (where |𝑡|=0.25 eV is the first neighbor hopping), at zero/non-zero magnetic field (𝐵), the FS on the first Brillouin zone is found to correspond to electron pockets around antinodal regions and barely visible patches around nodal regions. …”
Get full text
Article -
593
Research on gating alignment strategy for flow scheduling in satellite formation
Published 2024-08-01“…The experimental results demonstrate that the proposed strategy can ensure that after 5-hops satellite transmission, the time delay of the time-sensitive traffic flow keeps on 3 782~3 848 μs, and the jitter is stable at 30 μs, which is 20% lower than the existing schemes.…”
Get full text
Article -
594
Disorder-induced enhancement of lithium-ion transport in solid-state electrolytes
Published 2025-01-01“…This metric allows the classification of the disorder-induced “soft” hopping lithium ions. Our findings offer insights into ion conduction mechanisms in complex disordered structures, thereby contributing to the development of superior solid-state electrolytes for LIBs.…”
Get full text
Article -
595
Monitoring square and circular fields with sensors using energy-efficient cluster-based routing for underwater wireless sensor networks
Published 2017-07-01“…A depth threshold ( d th ) value is also used to minimize number of hops between source and destination for less energy consumption. …”
Get full text
Article -
596
Chemical Polymerization Kinetics of Poly-O-Phenylenediamine and Characterization of the Obtained Polymer in Aqueous Hydrochloric Acid Solution Using K2Cr2O7 as Oxidizing Agent
Published 2014-01-01“…The frequency exponent (s) was found to be less than unity and decreased with the increase of temperature, which confirms that the correlated barrier hopping model was the dominant charge transport mechanism.…”
Get full text
Article -
597
Periodic low-power communication technology scheme for large-scale transmission line condition monitoring sensor network
Published 2023-02-01“…In order to realize the purpose of low energy consumption, long service life and green development of transmission line monitoring, a periodic low-power communication technology scheme of large-scale transmission line condition monitoring sensor network was proposed.According to the networking characteristics of sensor networks in large-scale transmission line condition monitoring networks and the characteristics of node operation condition conversion, sleep timers were set to make the communication nodes of sensor networks switch between initialization, sleep and activation states in a periodic operation mode.The communication nodes entered the sleep state when there was no transmission demand for transmission line condition monitoring data, so as to save communication energy consumption.Sink nodes in sensor networks used gradients to create uplink routes and source routes to create downlink routes.Based on the number of hops and residual energy, sink nodes transmitted uplink and downlink routing data packets, to reduce node energy consumption and prolong communication running time.Experiments show that after the large-scale transmission line condition monitoring sensor network applies the technical solution, the communication energy consumption is significantly reduced, the running time is significantly prolonged, and the data transmission performance of the monitoring sensor network is not affected, and the service life of the monitoring sensor network is prolonged.…”
Get full text
Article -
598
Inter-satellite link connection strategy for large-scale low earth orbit satellite networks
Published 2024-08-01“…Simulation results show that, from the perspective of geometric topology, the proposed strategies can effectively reduce the average number of routing hops and path switches. At the packet level, the proposed strategies exhibit better performance in terms of round-trip time and jitter, path occupation ratio, average throughput and so on.…”
Get full text
Article -
599
Development of Energy-Efficient Routing Protocol in Wireless Sensor Networks Using Optimal Gradient Routing with On Demand Neighborhood Information
Published 2014-05-01“…It optimizes the number of hops for packet forwarding to the sink node which gives a better solution for energy consumption and delay. …”
Get full text
Article -
600
MORE MINUTES OF PHYSICAL EDUCATION CLASSES SUPPORT MOTOR DEVELOPMENT IN PRESCHOOL CHILDREN
Published 2010-12-01“…In conclusion, 90-minutes of physical education classes per week only benefit the FMS of galloping and hopping.…”
Get full text
Article