Endodontic and Esthetic Management of a Dilacerated Maxillary Central Incisor Having Two Root Canals Using Cone Beam Computed Tomography as a Diagnostic Aid by Sarang Sharma, Shibani Grover, Vivek Sharma, Dhirendra Srivastava, Meenu Mittal

“…Dilaceration is defined as an angulation or sharp bend or curve in the linear relationship of the crown of a tooth to its root. …”
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Co-plane coupling-feed compact wideband E-E shaped and half E-E shaped microstrip antenna by Fang YANG, Mingfei WEI, Junni ZHOU, Chun WANG, Min WANG

“…A compact and wideband microstrip patch antenna for multi-band wireless communications was proposed and designed.The antenna is fed by co-plane capacitive coupling method to compensate the inductance of the feeding probe,using stacked substrate of FR4 and air,an E-E or half E-E shaped radiating patch to reduce the size of the antenna.The results show that the bandwidths of the E-E and half E-E shape microstrip antennas are 1.85～2.57 GHz (relative bandwidth 32.6%) and 1.85～2.50 GHz (relative bandwidth 29.9%),respectively.Compared with ordinary E-shaped microstrip antenna,the area of E-E and half E-E microstrip antenna reducts by 47% and 61% patch.…”
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Field Measurement and Study on Overburden Fracture and Surface Subsidence Law of Solid Filling Mining under Buildings by Zhiyong Fu, Lujie Zhou, Kai Yu, Wanzhen Li, Hu Chen

“…Mine pressure monitoring and borehole peeping show that the overburden in solid filling mining is mainly a bending zone with relatively complete layered structure, and the overburden only develops a certain height of fault zone near the roof, without collapse. …”
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New Vibrational Information on Simple Amides in Solution: A Case Study on GaCl3-Formamide Complexes by Anna K. M. S. Gomes, Wagner A. Alves

“…Upshifts of both νCO and νCN modes of FA are observed, and analyses of the corresponding bands suggest different types of solvatocomplexes. …”
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Squaraine Planar-Heterojunction Solar Cells by Bin Fan, Ylenia Maniglio, Marina Simeunovic, Simon Kuster, Thomas Geiger, Roland Hany, Frank Nüesch

“…Due to the very strong squaraine absorption band in the red spectral domain, antibatic behavior due to light filtering is observed in the photocurrent spectrum for film thicknesses of 35 nm to 40 nm. …”
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Web Rotational Stiffness of Continuous Steel-Concrete Composite Castellated Beams by Carla Cristiane Silva, Rodrigo Barreto Caldas, Ricardo Hallal Fakury, Hermes Carvalho, João Victor Fragoso Dias

“…The design code EN 1994-1-1:2004 provides a procedure for the verification of this ultimate limit state, in which the resistant bending moment to LDB is calculated considering the behavior of the inverted “U-frame” mechanism. …”
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Wideband distributed cooperative compressed spectrum sensing algorithm based on weighted consensus optimization by Yuzhi YAN, Youming LI, Guili ZHOU, Yaohui WU

“…Wideband distributed cooperative spectrum sensing based on compressed sensing can not only reduce high sampling rate,but also improve the spectrum sensing performance in low signal to noise ratio environment.In order to further enhance the spectrum sensing performance,a wideband distributed cooperative compressed spectrum sensing algorithm based on weighted consensus optimization was proposed.In this algorithm,the next iterative reconstruction weights were determined according to the current iterative reconstructed spectrum signal,which can encourage the sub-band occupied by primary user to generate signal value and decrease the likelihood of incorrect reconstruction.Simulation results show that the proposed algorithm can not only increases the spectral reconstruction accuracy,but also reduces time and communication costs of the sensing process,and improves the spectrum sensing performance.…”
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Research and Practice of LTE 230 System with Wide Coverage Characteristics in the Power Distribution and Utilization Application by Jianyong Zhou, Zhifeng Tian, Yan Li, Baoren Chen

“…Combination with the smart grid communication needs, LTE 230 system is customized development based on the LTE core technology and uses 230 MHz frequency band. …”
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Efficient PAPR reduction algorithm in OFDM based on nonlinear piecewise companding by Zhitong XING, Yun LI, Deyi PENG, Bensi ZHANG, Kaiming LIU, Yuan’an LIU

“…Focusing on the high peak-to-average power ratio （PAPR） problem in orthogonal frequency division multiplexing （OFDM） systems， a generalized hybrid of rayleigh and sine distribution based nonlinear companding algorithm for PAPR reduction in OFDM systems was provided.For the proposed algorithm， signal samples with small amplitudes remain unchanged.For the signal samples with large amplitudes， their probability density function were changed from rayleigh distribution to sine-based distribution.The proposed algorithm can effectively reduce the PAPR， and at the same time， maintain the bit error rate performance and power spectral density performance.Simulation results indicate that with the same PAPR performance， compared with referred companding schemes， the proposed algorithm has lower bit error rate and out of band radiation.…”
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Bitter Panicgrass, Bitter Panicum, Panicum amarum by Debbie Miller, Mack Thetford, Chris Verlinde, Gabriel Campbell, Ashlynn Smith

“…This plant occurs throughout coastal Florida, except for the Big Bend coast, west to New Mexico, and along coastal northeast states to Massachusetts. …”
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Cyclostationary Feature Detection Based on Compressed Sensing and Wavelet De-Noising by Haifeng Tan, Jun Lu, Xuan Fu, Qixun Zhang

“…To improve the vacant spectrum utilization，ultra-wideband spectrum sensing is critical for cognitive radio （CR）as it enables secondary users to dynamically access the unoccupied spectrum bands.However，the fast and accurate spectrum sensing is still a challenge over an ultra-wide bandwidth in low signal to noise ratio（SNR） environment.A compressed sensing （CS）-feature detector based on wavelet de-noising was proposed to perform wideband detection in low SNR.CS was proposed to improve the efficiency of wideband spectrum sensing.And two dimensional wavelet transform was introduced to deal with the noise in spectral coherence function（SCF）by the CS process.As a result，the detection accuracy in low SNR was improved.It is found that the proposed technology can detect spectrum holes at a range of low SNR through simulation results.…”
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Experimental research on fracture behavior of concrete after high temperature by Peng Qiu

“…Based on the double K fracture model, the fracture properties of C70 strength grade concrete after being processed by high temperature of 25 �C ~ 800 �C were studied by three-point bending beam test. The change rules of fracture toughness KIC and fracture energy under different temperatures after being processed by high temperature were analyzed. …”
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A Lumped-Element Decoupling and Matching Network for a Four-Element Mobile Handset MIMO Antenna by Riku Kormilainen, Rasmus Luomaniemi, Anu Lehtovuori, Ville Viikari

“…The array is designed to operate in the 2.6–2.7 GHz LTE band. The DMN is applied to a four-element MIMO antenna array located on one side of the mobile phone chassis. …”
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Etude expérimentale et théorique d’un nouveau composé halogène pnicture Hg$_{12}$Sb$_6 ($Br$_{5,186}$I$_{6,814})$ by Kheit, Messaoud, Merazka, Soumia, Kars, Mohammed, Gómez-Herrero, Adrian, Roisnel, Thierry, Sidoumou, Mohamed

“…Its structure was determined by single crystal X-ray diffraction. The optical band gap was determined as 2,1 eV according to UV${-}$vis diffuse reflectance spectroscopy. …”
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5G-based networking in unlicensed spectrum by Min XU, Nan HU, Nan LI

“…Due to the growing demand for mobile communication services, the shortage of licensed frequency bands is becoming more and more obvious. Therefore 5G networks begin to consider deployment in the unlicensed spectrum, that is, to employ the NR protocol in unlicensed spectrum to provide access services. …”
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Evaluation of dominant factors for stability of grid‐connected inverters based on impedance sensitivity analysis by Lei Fang, Longji Feng, Chengbo Chu, Jun Xu, Rong Wu, Qingchuan Fan

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Reconfigurable and Tunable Metamaterials: A Review of the Theory and Applications by Jeremiah P. Turpin, Jeremy A. Bossard, Kenneth L. Morgan, Douglas H. Werner, Pingjuan L. Werner

“…There are a wide range of approaches that have been advanced in the literature for adding reconfiguration to metamaterial devices all the way from the RF through the optical regimes, but some techniques are useful only for certain wavelength bands. A range of tuning techniques span from active circuit elements introduced into the resonant conductive metamaterial geometries to constituent materials that change electromagnetic properties under specific environmental stimuli. …”
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Theoretical Analysis and Quick Calculation of Spur Gear Tooth Deformation by Zhang Jingcai, Liu Hongqi, Zhao Xiangfei, Yang Chao

“…The characteristic and rule of gear tooth contact,bending,shear,compress and basic deformation and so on are analyzed with a gear tooth form factor without unit. …”
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Over-deterministic method: The influence of rounding numbers on the accuracy of the values of Williams’ expansion terms by Vladimir Ruzicka, Lucie Malikova, Stanislav Seitl

“…The results are presented taking into account a three-point bend single edge notched beam. Crack tip stress tensor components are expressed using the linear elastic fracture mechanics (LEFM) theory in this work, more precisely via its multi-parameter formulation, i.e. by Williams’ power series (WPS). …”
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A Novel Ultrawideband Planar Inverted-F Antenna with Capacitive Ground Plane by Haixia Liu, Fei Wang, Yang Yang, Xiaowei Shi, Long Li

“…The capacitive ground plane is composed of a sheet of metal islands, which makes a major contribution to ultra-wideband from 2.3 GHz to 9.0 GHz by applying the capacitive compensation for input impedance of the PIFA in high-order modes frequency bands. The effect of geometric parameters of capacitive ground plane and antenna height on antenna performance is analyzed. …”
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