Spin angular momentum of Gaussian beams with several polarization singularities by A.A. Kovalev, V.V. Kotlyar

“…We study a paraxial vector Gaussian beam with several polarization singularities located on a circle. Such a beam is superposition of a cylindrically polarized Laguerre-Gaussian beam and a linearly polarized Gaussian beam. …”
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The FEA and experimental stress analysis in circular perforated plates loaded with concentrated force by Mateusz Konieczny, Grzegorz Gasiak, Henryk Achtelik

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Analysis of Transmission Error of RV Reducer based on Orthogonal Experiment by Li Hui, Xu Honghai, Wu Kai

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Inheritance of real estate under conditions of cohabitation by Pushka D.

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On the Klein–Gordon scalar field oscillators in a spacetime with spiral-like dislocations in external magnetic fields by Omar Mustafa, Abdullah Guvendi

“…Abstract We investigate the effects of two types of spiral dislocation (the distortion of the radial line, labeled as spiral dislocation I, and the distortion of a circle, labeled as spiral dislocation II) on the relativistic dynamics of the Klein–Gordon (KG) oscillator fields, both in the presence and absence of external magnetic fields. …”
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Finite-part singular integral approximations in Hilbert spaces by E. G. Ladopoulos, G. Tsamasphyros, V. A. Zisis

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Influence of Structural Parameters of Main Load Train of Asymmetric Hub Bearings on Friction Torque by Tang Yibo, Qiu Ming, Yang Chuanmeng, Wang Huijie

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Research and Practice of Surveying and Mapping for Failed Large Modulus Cylindrical Gear by Ben Daochun

“…From tooth profile wear and the demand of match manufacturing,a set of field mapping method is proposed,which does not depend drawings,while by virtue of toothed parameter with accumulated manufacturing experience that included addendum circle,tooth root circle,helix angle,variable coefficient measuring,modulus and pressure angle determining. …”
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Problems in the theoretical foundation of the functional-equivalent approach by G. J. C. Jordaan

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Study on the Impact of Climate Warming on Mariculture in China by GAO Jia, YANG Huaiyu

“…The results show that: (1) Although there are inter-annual fluctuations and regional differencesin temperature changes among provinces (autonomous regions and municipalities directly under the Central Government) there is an upward trend on the whole, confirming the macro background of global warming. (2) The overall output of mariculture in China is generally on the rise, especially in Liaoning, Shandong, Fujian, Guangdong and other provinces, which have become the core regions of mariculture in China. (3) Through in-depth analysis of the correlation between the temperature and the mariculture yield, it is found that there is a significant negative relationship between the two, that is, every 1% increase in temperature will lead to a decrease of about 2.65% in the mariculture yield. …”
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Discovering and Characterizing Hidden Variables Using a Novel Neural Network Architecture: LO-Net by Soumi Ray, Tim Oates

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A novel stereographic semi-circular distribution and enhanced analysis of the posterior corneal curvature of eye by Shakila Bashir, Bushra Masood, Aamir Sanaullah, Laila A. Al-Essa

“…Circular distributions within the (−π,π) radians range describe two-dimensional directions by mapping points onto a unit circle. …”
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Surface-Enhanced Raman Scattering as an Emerging Characterization and Detection Technique by Mustafa Culha, Brian Cullum, Nickolay Lavrik, Charles K. Klutse

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An Efficient Computation of Effective Ground Range Using an Oblate Earth Model by Dalal A. Maturi, Malik Zaka Ullah, Shahid Ahmad, Fayyaz Ahmad

“…The spherical Earth model does not provide good approximation of distance between two locations on the surface of Earth. We used oblate spheroid Earth model because it provides better approximations. …”
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PENGARUH VARIASI BENTUK FLAME HOLDER TERHADAP KARAKTERISTIK NYALA API PADA PEMBAKARAN MESO SCALE COMBUSTOR by Mochammad Khoirul Rosidin, Lilis Yuliati, Winarto Winarto

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Simulation and Experimental Analysis of Stiffness and Damping of the Waist Type Diaphragm Coupling by Hong Yun, Wang Dan, Nong Su, Zhu Rupeng, Chen Weifang

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Triassic evolution of the Adriatic-Dinaridic platform’s continental margins—insights from rare dolerite subvolcanic intrusions in External Dinarides, Croatia by Slovenec, Damir, Belak, Mirko, Badurina, Luka, Horvat, Marija, Šegvić, Branimir

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Fragmentation of Millimeter-Size Hypervelocity Projectiles on Combined Mesh-Plate Bumpers by Aleksandr Cherniaev, Igor Telichev

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TPACK in context: An updated model by Dominik Petko, Punya Mishra, Matthew J Koehler

“…The original model acknowledged contexts through a dotted circle surrounding the framework's core components; however, understanding and operationalizing these contexts has remained challenging for researchers and practitioners. …”
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Grouting Design of Rich Water Tunnels and the Calculation of Distance between Annular Blind Pipes by Helin Fu, Pengtao An, Kai Li, Guowen Cheng, Jie Li, Xiaohui Yu

“…The results show that (1) grouting reinforcement is an important means to reduce water seepage, and tunnel water seepage can be adjusted by changing the thickness and permeability coefficient of the grouting reinforcement circle, in which the thickness of the reinforcement circle should not be too large, and the permeability coefficient should not be less than 1/80 of the surrounding rock permeability coefficient; (2) according to the derived formula, the water pressure of the secondary lining structure decreases in a parabolic manner from the middle of the two rows of annular blind pipes to the place where the annular blind pipes are set; (3) the allowable water seepage of the tunnel and the design value of the water pressure resistance of the lining structure should be considered when determining the distance between annular blind pipes; and (4) based on the derived formula, the distance between the annular blind pipes in the test section of the Hongtu extra-long tunnel is determined to be 8 m.…”
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