Widening Frequency Envelope of an Antenna-Amplifier System With Coupling Structure by Jaanus Kalde, Anu Lehtovuori, Alvo Aabloo, Ville Viikari

“…Our experiments demonstrate that controlled coupling can significantly increase, even by 36%, the operation frequency envelope of the radio system. The finding suggests that mutual coupling between elements of an array might be beneficial, provided that weighted element feeding can be used for active impedance and beam reconfiguration.…”
Get full text

Ultra-Compact Slitted Flower-Shaped Dual-Band Monopole Antenna for Modern Portable Devices by Jeremiah O Abolade, Dominic B. O. Konditi

“…The MSB antenna proposed in this operates at 2.1 GHz and 5.2 GHz frequencies with a bandwidth of 70 MHz and 570 MHz and a radiation efficiency of 52.5% and 96%, respectively, which is suitable for UMTS, radio navigation, Long Term Evolution (LTE), and 5 GHz Wireless Local Area Network (WLAN) applications. …”
Get full text

The nomination of Rev. Kazimierz Rolewski as bishop of Katowice and the reasons for the refusal by Maciej Szczepaniak

“…Kazimierz Rolewski (1887–1936) — parish priest in the Archdiocese of Poznań, rector of the theological seminary, and radio preacher — remains an inspiring figure to this day, as evidenced by the ongoing beatification process. …”
Get full text

Vent’anni di memoria della Rivoluzione dei garofani negli archivi RAI (2004–2024) by Chiara Brizio Falletti di Castellazzo

“…By analysing television and radio programs from the ArchivioTecheRai database between 2004 and 2024, the research explores how Rai constructed a narrative around the revolution. …”
Get full text

Electric Field Measurement of the Living Human Body for Biomedical Applications: Phase Measurement of the Electric Field Intensity by Ichiro Hieda, Ki Chang Nam

“…The authors are developing a technique for conducting measurements inside the human body by applying a weak electric field at a radio frequency (RF). Low RF power is fed to a small antenna, and a similar antenna located 15–50 cm away measures the electric field intensity. …”
Get full text

Fast Two-Step Energy Detection for Spectrum Sensing by Meiling Lai, Shengliang Peng, Xi Yang, Lin Zhou

“…Spectrum sensing is one of the key tasks in cognitive radio. This paper proposes a fast two-step energy detection (FED) algorithm for spectrum sensing via improving the sampling process of conventional energy detection (CED). …”
Get full text

Research and evaluation of sparse array for massive MIMO by Mengting LOU, Jing JIN, Hanning WANG, Qixing WANG, Jiangzhou WANG

“…Massive multiple-input multiple-output (mMIMO) enables higher spectrum efficiency by deploying a large number of antenna elements.However, mMIMO will bring a substantial increase in the number of radio frequency (RF) channel, which will result in a sharp increase in cost.Therefore, it is necessary to design mMIMO with comprehensive consideration of the trade-off between the performance and the cost.Sparse array technology can approach the performance of the uniform array with less number of antenna elements by optimizing the position distribution and excitation amplitudes of the antenna elements, thereby reducing the number of RF channels and controlling the cost, and achieving a better cost-effective balance.Both link-level and system-level evaluations and analysis of sparse array based mMIMO that targets for 6G were performed under realistic simulation settings.The results show that with little performance loss, the sparse array based mMIMO can significantly reduce the number of antenna elements and the cost of base station infrastructure.…”
Get full text

Port Contention Aware Task Scheduling for SIMD Applications by Shogo Saito, Kei Fujimoto

“…Through evaluation, we find that the proposed method can reduce the processing time for some tasks in virtual radio access networks was reduced by 13.3%.…”
Get full text

Position related lightweight Sybil detection approach in VANET by Yan XIN, Xia FENG, Ting-ting LI

“…In VANET,the Sybil attack simultaneously using multiple forged identities can easily cause the injustice of resource usage and make networks in a mess by distributing false messages.To solve this problem,an event-driven lightweight algorithm was proposed,which could identify vehicles false position quickly.When one vehicle appeared inside another's safety zone,a geometrical cross-recognition algorithm to calculate the overlap between vehicles to detect false position claiming was presented.At the same time,according to the neighbors within the confirming vehicle's radio range,position deviation matrix was established further to identify the Sybil node of two overlap vehicles.The performance analysis and simulation results show that the lightweight algorithm driven by safety zone demonstrates fast identification and high detection rate,especially when GPS error is very low.The imported safety zone can also balance the communication load impacting by heavy vehicular density.And the communication processing delay is lower than other approaches.…”
Get full text

A CONCEPTUAL ANALYSIS OF FRAUD AND CORRUPTION IN THE PUBLIC SECTOR by Corina BOLOȘ

“…In short, our analysis draws attention to the fact that the phenomena of corruption and fraud in society are placed at the center of public opinion, daily either through the press, radio or television, from the Parliament's rostrum and other sources, various facts of a criminal nature regarding fraud and corruption in Romanian society in which representatives of state authorities, political parties and officials of various ranks are involved. …”
Get full text

A blockchain and internet of things-based information infrastructure for the Chinese automotive sector carbon-credit market by Yanchu Liu, Yu Zhang, Duosi Zheng

“…Specifically, we attached carbon credits to each vehicle with radio frequency identification electronic tags and a chained data structure to ensure the traceability and reliability of information flow. …”
Get full text

Progressive loss of upper limb function as a presenting feature of glenohumoral metastasis from a primary tongue malignancy by Adarsh Kudva, Vasantha Dhara, Asmita Unadkat

“…Skeletal distant metastasis occurs rarely in head and neck squamous cell carcinoma. Palliative chemo or radio-therapy, immunotherapy or surgical treatment are indicated depending on the site, number of bony metastases and performance score of the patient; however with guarded prognosis. …”
Get full text

Small cell discovery based on TOA fingerprint database by Yang CHEN, Zhenzhu LEI, Bin SHEN

“…In the scenario that a large number of small cells are deployed in the mobile communication network,the number of carriers to be detected by the user equipment (UE) in inter-frequency scanning is considerably larger than that in the conventional network deployment scenarios.This procedure may consume tremendous amounts of UEs’ energy.In order to solve this problem,a small cell discovery (SCD) scheme based on TOA fingerprint database to alleviate intensive energy consumption was proposed when the UEs try to find their potential serving small cells.The proposed scheme reduces the energy consumption of the UE by decreasing the number of unnecessary inter-frequency detection.The simulation results verifiy that the proposed scheme,compared with the existing SCD strategy using received signal strength (RSSI) based radio maps,has better anti-noise performance and higher accuracy.In addition,it can effectively help the high-speed UE avoid performing inter-frequency detection,and hence increase the rate of the UE being successfully connected to the appropriate small cell.…”
Get full text

Simulation System of Space-Air-Ground Integrated Micro-Service New Network Architecture in 6G by Junyi YANG, Fandi PEI, Zhaolong XU, Zhenyu XIAO

“…The space-air-ground integrated network is the inevitable trend of 6G development in the future.A set of verifi cation simulation system was designed and set up for the micro-service new network architecture of space-air-ground integrated network in 6G.A four-layer simulation system architecture was proposed, included access user layer, radio unit-distributed unit (RU-DU) layer, NFV case management layer and micro-service network element layer.The whole process of network topology establishment, user registration, session establishment and communication case simulation could be realized, which embodied the function of service-oriented network element.Three basic simulation communication cases, namely communication between users, handover management and session management, were designed, and the feasibility of the new network architecture was verifi ed by the handover management case, which laid the engineering foundation for the iterative evolution of network architecture.…”
Get full text

Joint optimization algorithm for enhanced inter-cell interference coordination in heterogeneous networks by Lai-wei JIANG, Xuan-li WU, Nai-tong ZHANG

“…By using this optimized method, the relationship between the total system throughput and the re-duced power almost blank subframe was studied, so as to realize the maximized total system throughput and solve the problems of the amount of radio resources that macro cells should offer to pico cells and UE assignments. …”
Get full text

Development of Algorithms for Processing Images of Large Volumes by O. N. Vinichuk, V. I. Dravitsa

Get full text

Wireless Channel Model Based on Ray Tracing Algorithm in the Sea Environment by Zhongyu Liu, Qi Yao, Quanqing Li, Lixin Guo, Shuo Hu

“…This study investigates the sensitivity of a three-dimensional (3D) maritime ray tracing (RT) model for the use of the geometrical optics in radio channel characterizations of maritime environments. …”
Get full text

An Asymmetrical Mixed Higher-Order Discontinuous Galerkin Time Domain Method for Electromagnetic Scattering from the Plasma Sheath around a Hypersonic Vehicle by Jirong Guo, Yiping Han

“…The plasma sheath during reentry of hypersonic vehicle is an unmagnetized and weakly ionized nonuniform plasma flow, which causes radio frequency blackout and strong plasma attenuation of electromagnetic wave. …”
Get full text

Delay-Modulated RF Tag System Concept Using Ultrawideband Noise Radar Waveforms by Qihe Pan, Ram M. Narayanan

“…Radio frequency (RF) tags have been widely used in inventory tracking, environmental monitoring, battlefield situational awareness, and combat identification due to their low cost, small size, and wireless functionality. …”
Get full text

Energy Efficiency Maximization with Optimal Beamforming in Secure MISO CRNs with SWIPT by Liang Xue, Yao Ma, Miao Zhang, Wanqiang Qin, Jin-Long Wang, Yazhou Wu

“…In this paper, the optimal beamforming problem of multi-input single-output (MISO) cognitive radio (CR) downlink networks with simultaneous wireless information and power transfer is studied. …”
Get full text