Stratification of the Low-Latitude and Near-Equatorial F2 Layer, Topside Ionization Ledge, and F3 Layer: What We Know about This? A Review by M. V. Klimenko, B. Zhao, A. T. Karpachev, V. V. Klimenko

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Idiopathic Non-Puerperal Uterine Inversion in a Young Female: A Case Report by Amit Kumar, Vinod Kumar, Priyam Sharma

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Power allocation of MIMO system with RF mismatch in TD-LTE power wireless private network by Bao FENG, Tao MA, Shilong CAI, Yang LI

“…With the development of smart distribution network,the power wireless private network using TD-LTE technology has gradually become a hot research topic.Among them,multiple-input multiple-output (MIMO) system is a key technology of TD-LTE power wireless private network.In TD-LTE,time-division duplex is often used to estimate channel information and perform appropriate power allocation to maximize the spectral efficiency of the communication system.However,due to the mismatch of radio frequency link,the complete uplink and downlink channels in the actual communication system can not achieve complete symmetry.The performance of MIMO system under radio frequency mismatch was analyzed and the suboptimal power allocation scheme was given.Combining with the approximate capacity expression,the spectral efficiency of the system under radio frequency mismatch and matching was analyzed.Simulation results show that compared with the optimal power allocation,the system capacity will suffer some loss due to the sub-optimal power allocation algorithm,but there is still some performance improvement compared with the equal power allocation algorithm,and does not require complicated calibration process.The realization of the operation proves the validity of the sub-optimal power allocation algorithm.…”
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Electron-ion collider transverse instabilities due to the crab cavity fundamental impedance by T. Mastoridis, T. Loe, M. Blaskiewicz

“…The electron-ion collider crab Cavities will present a significant transverse impedance to the beam. The low-level radio frequency system will have to reduce the crab cavity impedance to prevent transverse instabilities, while regulating the crabbing voltage and minimizing the radio frequency noise levels injected into the beam. …”
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Password authentication scheme for mobile computing environment by LIU Jun, LIAO Jian-xin, ZHU Xiao-min, WANG Chun

“…By means of IC（integrated circuit） card,RSA cryptography,and discrete logarithm,a password authentication scheme for mobile computing environment was presented.No verification tables were preserved at the server side to consolidate the security.To be applicable for the mobile computing environment,the scheme was designed as a one-roundtrip protocol to meet the computation-constraint terminals and narrow-bandwidth radio interface.Moreover,the passwords in use could be changed by users without any interaction with servers over the radio.The performance of the scheme was measured by making use of M/G/1/N queuing model and compared with that of TLS.…”
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Low-Latitude Mesosphere, Thermosphere, and Ionosphere by Y. Sahai, R. S. Dabas, Y. Otsuka, M. Klimenko

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Racismo ambiental e saúde: um estudo do bairro Santa Maria, em Aracaju (SE) by Josiane Soares Santos, Dalila Silva Ribeiro, Mylena da Silva, Ingrid Chaiane Conceição Santos

“…Ademais, expressa-se também na negligência do poder público quanto às medidas de saneamento ambiental necessárias àquela área de moradia, que conviveu por 27 anos com o depósito de lixo. …”
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Modified COST-235 Empirical Pathloss Model for Agricultural WSN Using Particle Swarm Optimization by Syahfrizal Tahcfulloh, Etty Wahyuni, Dwi Santoso, Rizkyandi Juliannanda

“…This paper explicitly examines and analyzes radio wave propagation modeling for measuring radio frequency (RF) signal strength in local agriculture's 2.4 GHz WSN system, such as Adan rice, corn, and peanuts. …”
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Detecting the Black Hole Candidate Population in M51’s Young Massive Star Clusters: Constraints on Accreting Intermediate-mass Black Holes by Kristen C. Dage, Evangelia Tremou, Bolivia Cuevas Otahola, Eric W. Koch, Kwangmin Oh, Richard M. Plotkin, Vivian L. Tang, Muhammad Ridha Aldhalemi, Zainab Bustani, Mariam Ismail Fawaz, Hans J. Harff, Amna Khalyleh, Timothy McBride, Jesse Mason, Anthony Preston, Cortney Rinehart, Ethan Vinson, Gemma Anderson, Edward M. Cackett, Shih Ching Fu, Sebastian Kamann, Teresa Panurach, Renuka Pechetti, Payaswini Saikia, Susmita Sett, Ryan Urquhart, Christopher Usher

“…We explore the optical properties of the remaining 17 sources, including cluster age and mass estimates, and search for radio counterparts in the 8–12 GHz band. The lack of radio counterparts to X-ray sources we know to be associated with young massive star clusters in M51 suggests that we do not significantly detect hard-state intermediate-mass black holes (IMBHs)  ~10 ^4 M _⊙   or above. …”
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High‐performance visible and near‐infrared dual‐band photodetector based on anisotropic 2D NbS3 with perpendicularly reversed polarization behaviors by Jidong Liu, Haibo Gan, Qiaoyan Hao, Yonghong Zeng, Youning Gong, Jiaqi Zhu, Jiarui Huang, Fei Liu, Wenjing Zhang

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Research on LoRa network security schemes based on RF fingerprint by Yu JIANG, Siqing CHEN, Wen SUN

“…Long range radio (LoRa) is widely used in the IoT due to its advantages of long distance and low power consumption.However, LoRa network has no reliable security scheme currently, making it unable to guarantee the communication security.Therefore, based on the uniqueness and tamper-resistance of radio frequency fingerprint, it was proposed to receive radio frequency signals of the LoRa end nodes which requested access, extract the fingerprints from them, mark it and match with the customized multi-scale security rules according to demands to decide whether the identities of the LoRa end nodes were safe, taking security measures accordingly.Based on this, original LoRa gateway and LoRa network architecture were improved, new workflows were designed, and two LoRa network security schemes were proposed.The two LoRa network security schemes were proposed which implement identity authentication and access control of the LoRa end nodes from the physical layer.It is only needed to improve the original LoRa gateway in the LoRa network architecture and its workflow, which adds new security measures and guarantees for LoRa applications on the basis of not affecting the original LoRaWAN security mechanism, with no need to modify a huge number of LoRa end nodes.The security schemes proposed have high practical value.…”
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Collaborative Cognitive Wireless Network Optimization Model and Network Parameter Optimization Algorithm by Tao Zhang

“…Such cognitive radio networks that use user collaboration to improve channel capacity and spectrum utilization are called collaborative cognitive radio networks. …”
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Survey: Discovery in Wireless Sensor Networks by Valerie Galluzzi, Ted Herman

“…Wireless sensor networks often must operate under a more severe low-power regimen than do traditional ad hoc networks, notably by turning off radio for extended periods. Turning off a radio is problematic for neighbor discovery, and a balance is needed between adequate open communication for discovery and silence to conserve power. …”
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Analysis of operator’s flow middle platform in 5G⁺native system by Yingqi WEI, Weiping LIN, Ying LI, Hua TAN

“…Based on the 5G mobile network,the traffic middle station was proposed,and the structure of the traffic middle station was introduced in detail.Flow middle platform highly abstracts the 5G connection management and flow delicacy control functions,simplify the operator’s traditional complicated IT interfaces,combines with data intelligent analysis.It helps massive industrial endpoints to access the 5G networks,build data connections to applications.It supports radio connection functions out of the box,frees the 5G industry internet application developers from intricacy radio connection development.…”
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Stability of Optimal Controls for the Stationary Boussinesq Equations by Gennady Alekseev, Dmitry Tereshko

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Rituximab (monoclonal anti-CD20 antibody) induced posterior reversible encephalopathy syndrome (PRES): A case report and literature review by Praveen K. Sharma, MD, Sanjaykanth Balachandar, MBBS, Michael Antony Vikram, MBBS, Pujitha Duvooru Sukumar, MD

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EDUCATIONAL TRAINING SIMULATOR FOR MONITORING READING TECHNIQUE AND SPEED BASED ON SPEECH-TO-TEXT (STT) METHODS by Olesia Barkovska, Heorhii Ivashchenko, Dmytro Rosinskiy, Daniil Zakharov

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Los orígenes de la radiodifusión y los modelos de investigación del discurso radiofónico by Josep V. Gavaldà Roca, Diego Mollá Furió, Nel·lo Pellisser Rossell

“…Las estrategias de legitimación de la programación radiofónica, del vínculo pragmático que aspira a crear este nuevo dominio cultural, son esenciales en la evaluación del mapa disciplinar en el que se inscribe la fundamentación de la teoría de la radio. En la formulación de las distintas propuestas teóricas y metodológicas son determinantes las políticas de regulación, los modelos de negocio de la economía radiofónica y la función política y cultural reconocida a la radio. …”
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Demonstration of Millimeter Wave 5G Setup Employing High-Gain Vivaldi Array by Waleed Tariq Sethi, Muhammad Ahmed Ashraf, Amr Ragheb, Amr Alasaad, Saleh A. Alshebeili

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Public Relations in Librarianship and Mass Media by Erol Yılmaz

“…İn this study to examine to see if radio, television and nevospa- pers, which are effective tools in public relations practices, are used in Turkish librar­ianship. …”
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