Communication and navigation integration for LEO constellations:status, opportunities, and challenges by Yafei ZHAO, Bing YAN, Yaohua SUN, Mugen PENG

“…With the growing maturity of millimeter wave technology and high-throughput satellite communication technology, as well as the urgent need for global broadband communication services, the construction of LEO giant communication constellation has attracted great attention, and up to thousands of satellites have been deployed.A large number of LEO communication satellites have realized multiple and repeated coverage of high-frequency radio frequency signals on the ground.At the same time, ground communication resources provide a hardware platform for signal reception and create conditions for the development of integrated communication and navigation.The status quo, opportunities and challenges of the integrated LEO navigation constellation were discussed, and the differences of resources required by the integrated LEO navigation constellation and the global navigation satellite system were emphatically expounded.In terms of space segment, ground segment and user segment, the conclusions and prospects for future research were presented.…”
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Modelling the impact of environmental responsibility on the development of enterprises by M. Pinskaya, O. Meleshchenko, O. Kovalchuk, O. Karpenko, E. Kompanets

“…This is an open access article distributed under the terms of the Creative Commons Attribution (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, as long as the original authors and source are cited. …”
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The Machine as an Autonomous Explanatory Agent by Dilek Yargan

“…., accountable for its decisions and actions, which is a per se attribute of an autonomous agent. In this respect, this paper aims to determine whether state-of-the-art technologies have already created an autonomous explanatory agent or are paving the way for the machine to become an autonomous explanatory agent. …”
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Life cycle of Spodoptera frugiperda J. E. Smith FED with Pennisetum purpureum Schumach and Paspalum conjugatum PJ Bergius leaves by Putra Ichsan Luqmana Indra, Mahdiana Liana Fairuzzannah

“…Spodoptera frugiperda is a pest that entered Indonesia and attacks corn plants. This pest can use other plants to complete its life cycle. …”
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Fabrication of Polycaprolactone/Polyurethane Loading Conjugated Linoleic Acid and Its Antiplatelet Adhesion by Ho Hieu Minh, Nguyen Thi Hiep, Nguyen Dai Hai, Vo Van Toi

“…Endothelial cells (EC) were also seeded on the scaffold to examine the difference in the morphology of EC layer and platelet attachment with and without the presence of CLA. SEM results showed that CLA supported the spreading and proliferation of EC and PCL/PU-CLA surface induced lower platelet adhesion as well as attachment of other blood cells compared to the PCL/PU one. …”
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Accuracy Synthesis of a 2UPS & UPR & UP Parallel Robot by Zhu Chao, Sun Zaichao, Zhang Jun

“…The standard deviation relationship between the uncompensable error sources and the terminal attitude errors is established to reveal the standard deviation distribution of the terminal attitude error in the workspace. …”
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Study on the Influence of Grooving Parameters of Lapping Gear Vibration System on Vibration Characteristics by Derong Zhu, Na Li, Hao Li, Jianjun Yang, Xiaozhong Deng, Hongmin Xin, Fuquan Nie

“…Under the same conditions concerning the attribute settings， grid partition， and modal analysis settings of the material， the influences of the number， width， length and position on the resonance frequency， vibration mode， displacement node and gear deformation are analyzed by Ansys Workbench； a method for controlling the coupled vibration produced by grooving the transmitted cylinder is established， which can further enrich and improve the existing design theory of the processing vibration system for ultrasonic lapping gears.…”
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On the Filtration Efficiency of Composite Media Composed of Multiple Layers of Electret Media by Peng Wang, Da-Ren Chen

“…., those possessing no charge, a single charge, and a stationary charge according to the Boltzmann distribution, we traced the discrepancy to the latter attribute. Hence, to accurately predict the filtration efficiency of multi-layered electret media, we must account for the test particles’ electrical charge distribution.…”
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Summary and Prospect of Steel Slag Treatment Technology at the “Double Carbon” Goal by Yidang HAO, Huigang WANG, Long WU, Guibo QIU, Changsheng YUE, Ben PENG

“…At the goal of "double carbon", we should pay attention to and strengthen the full quantitative recovery and utilization of metal iron, tailings and heat energy in molten steel slag, so as to truly help achieve the goal of "double carbon".…”
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Evaluation, Energy Optimization, and Spectrum Analysis of an Artificial Noise Technique to Improve CWSN Security by Javier Blesa, Alvaro Araujo, Elena Romero, Octavio Nieto-Taladriz

“…Security evaluation demonstrates that these techniques are effective against eavesdropper attacks, but also optimization allows for the implementation of these approaches in low-resource networks such as Cognitive Wireless Sensor Networks. …”
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Utility sector of tourism infrastructure in Industry 4.0: challenges and solutions by N. Chernenko, A. Kukharuk, Ya. Hlushchenko, O. Korohodova

“…This article is an original attempt to define the necessity of providing the components of Industry 4.0 of the utility sector of tourism infrastructure. …”
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“… Murtaza-Ali Ogly”. (Concerning the origin of Chilla and Magomad Murtazalievs) by Sergey V. Talantov

“…Museum and private collections contain kindjals and shashkas of 1880-1910’s with the Cyrillic inscription “CHILLA” that are attributed as items crafted by Chilla Murtazaliev’s workshop. …”
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Investigation of postural balance control in judo and handball players by Ahmet Sanıoglu, Cengiz Taskın, Mine Taskın, Onder Karakoc

“…Also, we found significant differences between judo and handball for male athletes (P lt;0.05) and judo and handball for female athletes (P lt;0.05). …”
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Needlework and John Ruskin’s “acicular art of nations” by Rachel M. W. DICKINSON

“…This essay outlines Victorian cultural critic John Ruskin’s use of needlework. Paying particular attention to textiles in the opening and closing of Fors Clavigera (1871-1885), and highlighting educational texts by two women cited there (Kate Stanley and Millicent Garrett Fawcett), this paper argues that Ruskin blurs the boundaries of Victorian Britain’s hierarchical classifications of gender, class, nation and art. …”
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Adsorption-Desorption Surface Bindings, Kinetics, and Mass Transfer Behavior of Thermally and Chemically Treated Great Millet Husk towards Cr(VI) Removal from Synthetic Wastewater by Anuj Kumar Prajapati, Pushkar Verma, Satyansh Singh, Monoj Kumar Mondal

“…For Cr(VI) solution of 25 mg/L, adsorbent dose of 4 g/L, temperature of 25°C, and shaking speed of 150 RPM, the maximum removal for TT-GMH was attained at pH 1 and contact time 150 min, while for CT-GMH, maximum removal was attained at pH 2 and contact time 120 min. …”
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Air Quality Index, Indicatory Air Pollutants and Impact of COVID-19 Event on the Air Quality near Central China by Kaijie Xu, Kangping Cui, Li-Hao Young, Ya-Fen Wang, Yen-Kung Hsieh, Shun Wan, Jiajia Zhang

“…The COVID-19 event, which triggered global attention, broke out at the end of 2019. This study also investigated and compared the air quality levels in the three cities from January to March 2017–2019 with those in 2020. …”
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Identifikasi Telur Cacing Soil Transmitted Helminths pada Sayuran Selada (Lactuca Sativa) yang Dijual oleh Pedagang Makanan di Sepanjang Jalan Perintis Kemerdekaan Kota Padang by Nashiha Alsakina, Adrial Adrial, Nita Afriani

“…Soil Transmitted Helminthiasis atau penyakit kecacingan adalah istilah yang merujuk kepada sekelompok penyakit akibat infeksi cacing Soil Transmitted Helminths (STH). …”
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Modulation of the Microstructure and Enhancement of the Photocatalytic Performance of g-C3N4 by Thermal Exfoliation by Xinshan Zhao, Junwei Yu, Tingyu Meng, Yuanyuan Luo, Yanzhen Fu, Zhao Li, Lin Tian, Limei Sun, Jing Li

“…This work explores the impact of reaction temperature during thermal exfoliation treatment of bulk-g-C3N4 in the air atmosphere on the structure and performance of the resulting CN photocatalyst. …”
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Migraine with Prolonged Aura: Correlation of Clinical and EEG Features by A. O. Ogunyemi

“…This report describes five patients who underwent clinical assessment and EEG recordings during attacks of migraine with prolonged aura. CT scan of the brain was obtained in four of them. …”
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Strategies to Improve the Quality and Freshness of Human Bone Marrow-Derived Mesenchymal Stem Cells for Neurological Diseases by Da Yeon Lee, Sung Eun Lee, Do Hyeon Kwon, Saraswathy Nithiyanandam, Mi Ha Lee, Ji Su Hwang, Shaherin Basith, Jung Hwan Ahn, Tae Hwan Shin, Gwang Lee

“…Among mesenchymal stem cells, such as BM-MSCs, adipose-derived MSCs, and umbilical cord MSCs, BM-MSCs have many merits as cell therapeutic agents based on their widespread availability and relatively easy attainability and in vitro handling. For stem cell-based therapy with BM-MSCs, it is essential to perform ex vivo expansion as low numbers of MSCs are obtained in bone marrow aspirates. …”
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