Second harmonic generation from the `centrosymmetric' crystals by Nalla, Venkatram, Medishetty, Raghavender, Wang, Yue, Bai, Zhaozhi, Sun, Handong, Wei, Ji., Vittal, Jagadese J.

“…Second harmonic generation (SHG) is a well known non-linear optical phenomena which can be observed only in non-centrosymmetric crystals due to non-zero hyperpolarizability. …”
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Graphs with three eigenvalues and second largest eigenvalue at most 1 by Cheng, Xi-Ming, Greaves, Gary Royden Watson, Koolen, Jack H.

“…We classify the connected graphs with precisely three distinct eigenvalues and second largest eigenvalue at most 1.…”
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Information processing second law for an information ratchet with finite tape by He, Lianjie, Pradana, Andri, Cheong, Jian Wei, Chew, Lock Yue

“…Nonetheless, cumulative work can be accrued or expended through successive tape scans and we prove that at all time the ratchet obeys the information processing second law (IPSL). Unlike the IPSL for the infinite-tape ratchet which operates only at the stationary state, the IPSL here is applicable also at the transient phase of the ratchet operation. …”
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A discrete analogue for Minkowski’s second theorem on successive minima by Malikiosis, Romanos-Diogenes

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Intense second-harmonic generation in two-dimensional PtSe2 by Chu, Lingrui, Li, Ziqi, Zhu, Han, Lv, Hengyue, Chen, Feng

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The primal-dual second-order cone approximations algorithm for symmetric cone programming by Chua, Chek Beng.

“…Given any open convex cone K, a logarithmically homogeneous, self-concordant barrier for K and any positive real number r < 1, we associate, with each direction x 2 K, a second-order cone ˆKr(x) containing K. We show that K is the interior of the intersection of the second-order cones ˆKr(x), as x ranges over all directions in K. …”
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Second-harmonic generation of embedded plasmonic nanoparticle arrays via interparticle coupling by Chu, Lingrui, Li, Ziqi, Zhu, Han, Ren, Feng, Chen, Feng

“…Efficient nonlinear frequency conversion, such as second-harmonic generation in ultracompact structures, is essential for the development of modern nanophotonic devices. …”
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Intrinsic second-order anomalous hall effect and its application in compensated antiferromagnets by Liu, Huiying, Zhao, Jianzhou, Huang, Yue-Xin, Wu, Weikang, Sheng, Xian-Lei, Xiao, Cong, Yang, Shengyuan A.

“…For anomalous Hall transport in magnets, an intrinsic effect can appear at the second order to the applied electric field. We show that this intrinsic second-order anomalous Hall effect is associated with an intrinsic band geometric property-the dipole moment of Berry-connection polarizability (BCP) in momentum space. …”
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Strong second-harmonic generation by sublattice polarization in non-uniformly strained monolayer graphene by Lu, Kunze, Luo, Manlin, Gao, Weibo, Wang, Qi Jie, Sun, Hao, Nam, Donguk

“…Despite the potential of graphene for building a variety of quantum photonic devices, its centrosymmetric nature forbids the observation of second harmonic generation (SHG) for developing second-order nonlinear devices. …”
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Regulation of the physiology and virulence of Ralstonia solanacearum by the second messenger 2',3'-cyclic guanosine monophosphate by Li, Xia, Yin, Wenfang, Lin, Desmond Junjie, Zhang, Yong, Guo, Quan, Wang, Gerun, Chen, Xiayu, Cui, Binbin, Wang, Mingfang, Chen, Min, Li, Peng, He, Ya-Wen, Qian, Wei, Luo, Haibin, Zhang, Lian-Hui, Liu, Xue-Wei, Song, Shihao, Deng, Yinyue

“…Previous studies have demonstrated that bis-(3',5')-cyclic diguanosine monophosphate (bis-3',5'-c-di-GMP) is a ubiquitous second messenger employed by bacteria. Here, we report that 2',3'-cyclic guanosine monophosphate (2',3'-cGMP) controls the important biological functions, quorum sensing (QS) signaling systems and virulence in Ralstonia solanacearum through the transcriptional regulator RSp0980. …”
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Topology of the second-order constitutive model based on the Boltzmann–Curtiss kinetic equation for diatomic and polyatomic gases by Singh, Satyvir, Karchani, Abolfazl, Sharma, Kuldeep, Myong, Rho Shin

“…In the case of velocity shear, the topology of the second-order constitutive model was shown to be governed by a simple algebraic form. …”
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Regularity and generalized polynomial chaos approximation of parametric and random second-order hyperbolic partial differential equations by Hoang, Viet Ha., Schwab, Christoph.

“…Initial boundary value problems of linear second-order hyperbolic partial differential equations whose coefficients depend on countably many random parameters are reduced to a parametric family of deterministic initial boundary value problems on an infinite dimensional parameter space. …”
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Computational study of hypersonic rarefied gas flow over re-entry vehicles using the second-order Boltzmann-Curtiss constitutive model by Chourushi, Tushar, Singh, Satyvir, Sreekala, Vishnu Asokakumar, Myong, Rho Shin

“…The total drag and heat transfer rate of the second-order constitutive model remained smaller than those of the first-order constitutive model in the rarefied regime, which makes the second-order results in better agreement with the direct simulation Monte Carlo.…”
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A three-dimensional modal discontinuous Galerkin method for the second-order Boltzmann-Curtiss-based constitutive model of rarefied and microscale gas flows by Singh, Satyvir, Karchani, Abolfazl, Chourushi, Tushar, Myong, Rho Shin

“…The mixed modal DG scheme was used for solving conservation laws in conjunction with the second-order Boltzmann-Curtiss-based constitutive model of diatomic and polyatomic gases in strong thermal nonequilibrium. …”
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Thermal and flow characteristics of nonequilibrium monatomic, diatomic, and polyatomic gases in cylindrical Couette flow based on second-order non-Navier–Fourier constitutive model by Chourushi, Tushar, Rahimi, A., Singh, Satyvir, Ejtehadi, O., Mankodi, T. K., Myong, Rho Shin

“…The thermal and flow characteristics of nonequilibrium monatomic, diatomic, and polyatomic gases in cylindrical Couette flow are investigated using first- and second-order Boltzmann–Curtiss-based constitutive models. …”
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Renal-clearable nickel-doped carbon dots with boosted photothermal conversion efficiency for multimodal imaging-guided cancer therapy in the second near-infrared biowindow by Tian, Boshi, Liu, Shikai, Feng, Lili, Liu, Shaohua, Gai, Shili, Dai, Yunlu, Xie, Lisi, Liu, Bin, Yang, Piaoping, Zhao, Yanli

“…Photothermal agents with absorption in the second near-infrared (NIR-II) biowindow have attracted increasing attention for photothermal therapy (PTT) on account of their deeper tissue penetration capacity. …”
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Numerical scheme for the far-out-of-equilibrium time-dependent Boltzmann collision operator: 1D second-degree momentum discretisation and adaptive time stepping by Wadgaonkar, I., Jain, R., Battiato, Marco

“…Here we extend it to achieve a higher order momentum space convergence by extending to second degree basis functions.cWe further use an adaptive time stepper, achieving a significant improvement in the numerical performance. …”
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Generic attacks on hash combiners by Bao, Zhenzhen, Dinur, Itai, Guo, Jian, Leurent, Gaëtan, Wang, Lei

“…-An improvement upon the second attack with a best-case complexity of 2 5n/8 obtained for messages of length 2 5n/8. …”
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Reduction pathways of 2,4,6-trinitrotoluene : an electrochemical and theoretical study by Chua, Chun Kiang, Pumera, Martin, Rulíšek, Lubomír

“…Since the other isomer, 2,4-diamino-6-nitrotoluene, exhibits a reduction peak at −0.712 V, we conclude that the second reduction occurs also in the ortho position with respect to the methyl group. …”
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Glass formation of a DMSO – water mixture probed with a photosynthetic pigment by Huerta-Viga, Adriana, Nguyen, Linh-Lan, Amirjalayer, Saeed, Sim, Jamie Hung Ni, Zhang, Zhengyang, Tan, Howe-Siang

“…Here we show how the appearance of a second component in the visible absorption spectrum of a photosynthetic pigment upon cooling can be used to probe the glass transition of a dimethylsulfoxide–water mixture. …”
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