Performance analysis and optimization for coverage classes updating mechanism of narrow-band internet of things by Xin JIAN, Yuqin LIU, Yixiao WEI, Jian SONG, Fang WANG, Shu FU, Xiaoheng TAN

“…A Markov chain model with coverage classes as state variables was established to describe the dynamics of the coverage classes updating mechanism of narrow-band internet of things (NB-IoT).An optimization model to minimize average probability of access failure as well as average power consumption was formulated,with which the effects of preamble repetition number,system load and global maximum transmission number on the optimal configuration of maximum transmission number of each coverage class was analyzed.Numerical analysis results show that the maximum transmission number of normal coverage and extended coverage have a great influence on the system performance and their value ranges should be set within[1,5]and[1,7]respectively.However,the maximum transmission number of extreme coverage has little influence on the system performance,its value could be any one in[1,10]but the recommended value is 1.In addition,the average power consumption of the model that introduced coverage classes’ rollback mechanism is about 95% lower than the model proposed by 3GPP.…”
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Dynamics on Effect of Prey Refuge Proportional to Predator in Discrete-Time Prey-Predator Model by G. S. Mahapatra, P. K. Santra, Ebenezer Bonyah

“…Prey-predator models with refuge effect have great importance in the context of ecology. Constant refuge and refuge proportional to prey are the most popular concepts of refuge in the existing literature. …”
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A Concise Presentation of Doubly Fed Induction Generator Wind Energy Conversion Systems Challenges and Solutions by Julius Mwaniki, Hui Lin, Zhiyong Dai

“…The DFIG WECS operation, under both steady state and fault conditions, is of great interest since it impacts on grid performance. …”
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Biomimetic and biodegradable separator with high modulus and large ionic conductivity enables dendrite-free zinc-ion batteries by Hong Ma, Hongli Chen, Minfeng Chen, Anxin Li, Xiang Han, Dingtao Ma, Peixin Zhang, Jizhang Chen

“…Abstract The advancement of aqueous zinc-based batteries is greatly restricted by zinc dendrites. One potential solution to this challenge lies in the employment of high-modulus separators. …”
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STUDYING BIODIVERSITY OF FERN (POLYPODIOPHYTA) IN HON GIAO DWARF FOREST – BIDOUP NUI BA NATIONAL PARK by Nguyễn Hồng Hạnh, Trần Văn Tiến

“…The species distributed and varied greatly in spatial scale. Fern diversity was the highest at sites with low altitudes (1600-1700 m a.s.l.) and the lowest at site with high altitudes (≥ 1800m a.s.l.). …”
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Comparative Study of Serological Tests for Mycoplasma synoviae Diagnosis in Commercial Poultry Breeders by R. L. Luciano, A. L. S. P. Cardoso, G. F. Z. Stoppa, A. M. I. Kanashiro, A. G. M. de Castro, E. N. C. Tessari

“…Avian mycoplasmosis causes great economic losses to the poultry industry, and one of the major agents involved is Mycoplasma synovie (MS). …”
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Analysis of Drag Reduction Methods and Mechanisms of Turbulent by Gu Yunqing, Liu Tao, Mu Jiegang, Shi Zhengzan, Zhou Peijian

“…Fluid in turbulent state will result in a greater frictional force, which must consume great energy. Therefore, it is not only an important influence in saving energy and improving energy utilization rate but also an extensive application prospect in many fields, such as ship domain and aerospace. …”
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Silicon photonic MEMS switches based on split waveguide crossings by Yinpeng Hu, Yi Sun, Ye Lu, Huan Li, Liu Liu, Yaocheng Shi, Daoxin Dai

“…Both elementary switch and a 64×64 switch array based on Benes topology are fabricated and characterized, demonstrating great potential for practical scenarios such as photonic interconnect/routing, Lidar and spectroscopy, photonic computing, as well as microwave photonics.…”
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Angiotensin-(1-7)-Mediated Signaling in Cardiomyocytes by Enéas R. M. Gomes, Robson A. S. Santos, Silvia Guatimosim

“…Of particular interest is the heptapeptide Ang-(1-7) that has been shown to exert cardioprotective effects. In this way, great compilations about Ang-(1-7) actions in the heart have been presented in the literature. …”
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Uniaxial strain tuning of charge modulation and singularity in a kagome superconductor by Chun Lin, Armando Consiglio, Ola Kenji Forslund, Julia Küspert, M. Michael Denner, Hechang Lei, Alex Louat, Matthew D. Watson, Timur K. Kim, Cephise Cacho, Dina Carbone, Mats Leandersson, Craig Polley, Thiagarajan Balasubramanian, Domenico Di Sante, Ronny Thomale, Zurab Guguchia, Giorgio Sangiovanni, Titus Neupert, Johan Chang

“…Abstract Tunable quantum materials hold great potential for applications. Of special interest are materials in which small lattice strain induces giant electronic responses. …”
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Organophotocatalyst Enabled Deoxycyclopropanation of Alcohols by Yongsheng Zhang, Jincheng Wang, Xiaoyan He, Shilin Peng, Lei Yuan, Gang Huang, Yongjin Guo, Xiuhong Lu

“…Therefore, developing methods to construct cyclopropanes is of great significance. Nevertheless, the introduction of cyclopropane primarily relies on already‐formed cyclopropyl groups, which significantly restricts the diversity of cyclopropane skeletons. …”
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Characterization of Volatile Compounds of Bulgur (Antep Type) Produced from Durum Wheat by Saad Ibrahim Yousif, Mustafa Bayram, Songul Kesen

“…The study showed that there was a great diversity of volatiles in bulgur produced using Durum wheat and Antep type production method. …”
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An approach to energy conservation in lighting systems using luminaire-based sensor for automatic dimming by Chaiyan Jettanasen, Surakit Thongsuk, Chayanut Sottiyaphai, Panapong Songsukthawan, Pathomthat Chiradeja, Praikanok Lertwanitrot, Santipont Ananwattanaporn, Atthapol Ngaopitakkul

“…Therefore, energy conservation within these systems can greatly enhance overall building energy efficiency. …”
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The Role of Organizational Culture in the Influence of HRM Practices and Transformational Leadership on Organizational Performance by Andriani Fahira, Agustinus Setyawan

“…The logistics industry faces great challenges in maintaining efficiency and competitiveness, so this study aims to understand how these factors interact and influence company performance. …”
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Numerical Investigation of Contact Burning in an Air-Breathing Continuous Rotating Detonation Engine by Dapeng Xiong, Mingbo Sun, Haoyang Peng, Yanan Wang, Yixin Yang, Hongbo Wang, Jiangfei Yu, Zhenguo Wang

“…The expanding angle of the combustor has a great impact on the shape of the detonation wave but has little influence on the propagation velocity. …”
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Financial Early Warning System Model Combining Hybrid Semantic Hierarchy with Group Method of Data Handling Neural Network for Detection of Banks’ Risks by Guangju Li

“…Banks, financial, and credit institutions encountering the weakening financial system and increased risk factors cause high inflation and great losses for an economy. Detecting financial risks in advance could help financial institutions avoid losses, and the financial system could be eventually affected less. …”
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Some novel exact solutions for the generalized time-space fractional coupled Hirota-Satsuma KdV equation by Yueling Cheng, Siyuan Hong, Shujun Yang, Xu Chi, Jinghao Yang

“…These solutions are of great significance for revealing the nonlinear interaction between two long waves with different dispersion effects. …”
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BLOOD PARAMETERS, NONSPECIFIC RESISTANCE, AND PRODUCTIVITY OF FINE-WOOL SHEEP OF DIFFERENT GENOTYPES by E. A. Lakota, O. A. Vorontsova, I. A. Polnikov, Yu. I. Galtsev

“…Along with these indications for selection, the level of natural resistance and adaptive potential of animals are of great importance. Assays of biochemical and hematological indices, humoral factors have shown that the hybrids, as compared to purebred peers, are more productive and have a higher adaptive capacity, which is a significant economic indicator in the modern sheep industry.…”
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Colonization by Triatoma sordida Stål, 1859 (Hemiptera: Reduviidae: Triatominae) in an urban area: assessment of transmission risk in the Araçatuba region, state of São Paulo, Braz... by Rubens Antonio da Silva, Fernanda Santos Silva, Neusa Madalena Bertani de Freitas, Neusa Madalena Bertani de Freitas, Tânia Mara Tomiko Suto, Rosemari Suto, Wilson Antonio de Souza, Abílio José Batista Costa, Keuryn Alessandra Mira Luz Requena

“…Triatoma sordida is well distributed in Brazil and has great epidemiological importance. The presence of this vector in an urban environment in the state of São Paulo has already been reported, but without evidence of colonization of the species. …”
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History and National Integration: A Study of Collective Memory of Tamiang Monuments in Medan 1894 by Aulia Rahman, Husaini Ibrahim, Okhaifi Prasetyo, Usman Usman, Mufti Riyani

“…The monument is an important symbol to remind people of the greatness and courage in the struggle against the colonizers. …”
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