Trapped-mode excitation in all-dielectric metamaterials with loss and gain

Non-Hermitian photonics based on combining loss and gain media within a single optical system provides a number of approaches to control and generate the flow of light. In this paper, we show that by introducing non-Hermitian perturbation into the system with loss and gain constituents, the high-quality resonances known as trapped modes can be excited without the need to change the symmetry of the unit cell geometry. To demonstrate this idea, we consider a widely used all-dielectric planar metamaterial whose unit cell consists of a pair of rectangular nanoantennas made of ordinal (with loss) and doped (with gain) silicon. Since the quality factor of the trapped-mode resonance can be controlled by changing both spatial symmetry and non-Hermiticity, varying loss and gain allows us to compensate for the influence of asymmetry and restore the quality factor of the localized mode. The results obtained suggest new ways to achieve high-quality resonances in non-Hermitian metamaterials promising for many practical applications in nanophotonics.Comment: 7 pages, 6 figure

Modern legal problems in aerial logistic automation and robotization.

New technologies can serve logistics for creation multilayer transport nets, where transportation of different goods can be made by automated systems and mechanisms, starting at storing facility and ending next to the parcel recipient door. The world is expanding and sometimes existed transport nets are overloaded. This situation will be more complicated in the nearest 5-10 years. That is why the new solution for delivery should be made. So can drones directed by special AI be the next main mode for delivery and how the government will regulate it

Serhii Kozlovskyi, Vladyslav Bolhov, Allam Yousuf, Albina Batechko, Larisa Hlushchenko and Nataliia Vitka (2019). Marketing analysis of the electromobile market as a factor in the innovation of the national economy. Innovative Marketing , 15(1), 42-53. doi:10.21511/im.15(1).2019.04

The marketing development of the electric vehicle market can be considered as a key element of innovative changes in the national economy. Object of research is the development of the electric vehicle market. The purpose of this article is the theoretical substantiation and development of guidelines for determining the rating of countries by the level of development of this market as a determining factor in the innovative development of the national economy. In the study, expert survey methods, logical generalization and comparison of results, statistical analysis and graphical presentation of results were used. The study conducted a marketing analysis of sales and production of electric cars, government programs to stimulate them, existing rating indicators of countries for the development of the electric vehicle market, and based on the results, a method for determining the integrated rating indicator of national economy innovativeness was developed. The article established that in countries that are world economic leaders, the growing interest of consumers and manufacturers of cars to electric vehicles, which is actively supported by government programs and incentives. It is proposed to use a integrated indicator of innovative development of the national economy, which are directly related to the market of electric vehicles. This indicator consists of the following factors: share of investments in the development of branches related to the national production of electric vehicles; level of growth of electric transport in the country’s total fleet; the share of electric vehicles in total number of cars produced in the country; level of increase in the amount of electricity produced based on RES in total; infrastructure development; level of state support for the market. The use of these integrated factors in marketing analysis will determine the level of the world leader in the country, its innovative development

Scientific Herald of the Institute of Vocational Education and Training of the National Academy of Pedagogical Sciences of Ukraine. Vocational pedagogy

У збірнику розглядаються теоретичні та методичні основи розвитку професійно-технічної освіти; окреслено напрями модернізації змісту професійної підготовки кваліфікованих робітників; висвітлено вітчизняні та зарубіжні аспекти розвитку професійної освіти і навчання. Проаналізовано сучасний стан створення і використання електронних підручників для системи ПТО, визначено перспективи розвитку професійної та інформаційно-аналітичної компетентності педагогічних працівників професійно- технічних навчальних закладів. Для науковців, науково-педагогічних і педагогічних працівників ВНЗ, ПТНЗ, структурних навчальних підрозділів підприємств, інститутів післядипломної педагогічної освіти, наукових, навчально-методичних центрів ПТО, аспірантів, докторантів.The collected articles research theoretical and methodological foundations of vocational education; outlines the content areas of modernization of training skilled workers; covers domestic and foreign aspects of vocational education and training. The present state of creation and use of e-books for the VET system, defined prospects of professional and information-analytical competence teaching staff of vocational schools. For scientists, scientific-pedagogical and pedagogical personnel of universities, VET institutions, educational structural subdivisions of enterprises, institutes of further pedagogical education, scientific and training-methodological VET centers, graduate student, doctoral candidate

Combined QCD and electroweak analysis of HERA data

A simultaneous fit of parton distribution functions (PDFs) and electroweak parameters to HERA data on deep inelastic scattering is presented. The input data are the neutral current and charged current inclusive cross sections which were previously used in the QCD analysis leading to the HERAPDF2.0 PDFs. In addition, the polarisation of the electron beam was taken into account for the ZEUS data recorded between 2004 and 2007. Results on the vector and axial-vector couplings of the Z boson to u- and d-type quarks, on the value of the electroweak mixing angle and the mass of the W boson are presented. The values obtained for the electroweak parameters are in agreement with Standard Model predictions.Comment: 32 pages, 10 figures, accepted by Phys. Rev. D. Small corrections from proofing process and small change to Fig. 12 and Table

Limits on the effective quark radius from inclusive epep scattering at HERA

The high-precision HERA data allows searches up to TeV scales for Beyond the Standard Model contributions to electron-quark scattering. Combined measurements of the inclusive deep inelastic cross sections in neutral and charged current $ep$ scattering corresponding to a luminosity of around 1 fb$^{-1}$ have been used in this analysis. A new approach to the beyond the Standard Model analysis of the inclusive $ep$ data is presented; simultaneous fits of parton distribution functions together with contributions of "new physics" processes were performed. Results are presented considering a finite radius of quarks within the quark form-factor model. The resulting 95% C.L. upper limit on the effective quark radius is $0.43\cdot 10^{-16}$ cm.Comment: 10 pages, 4 figures, accepted by Phys. Lett.

Search for a narrow baryonic state decaying to pKS0{pK^0_S} and pˉKS0{\bar{p}K^0_S} in deep inelastic scattering at HERA

A search for a narrow baryonic state in the $pK^0_S$ and $\bar{p}K^0_S$ system has been performed in $ep$ collisions at HERA with the ZEUS detector using an integrated luminosity of 358 pb$^{-1}$ taken in 2003-2007. The search was performed with deep inelastic scattering events at an $ep$ centre-of-mass energy of 318 GeV for exchanged photon virtuality, $Q^2$, between 20 and 100 $\rm{} GeV^{2}$. Contrary to evidence presented for such a state around 1.52 GeV in a previous ZEUS analysis using a sample of 121 pb$^{-1}$ taken in 1996-2000, no resonance peak was found in the $p(\bar{p})K^0_S$ invariant-mass distribution in the range 1.45-1.7 GeV. Upper limits on the production cross section are set.Comment: 16 pages, 4 figures, accepted by Phys. Lett. B. Minor changes from journal reviewing process, including a small correction to figure

Constraints on the χ_(c1) versus χ_(c2) polarizations in proton-proton collisions at √s = 8 TeV

The polarizations of promptly produced χ_(c1) and χ_(c2) mesons are studied using data collected by the CMS experiment at the LHC, in proton-proton collisions at √s=8  TeV. The χ_c states are reconstructed via their radiative decays χ_c → J/ψγ, with the photons being measured through conversions to e⁺e⁻, which allows the two states to be well resolved. The polarizations are measured in the helicity frame, through the analysis of the χ_(c2) to χ_(c1) yield ratio as a function of the polar or azimuthal angle of the positive muon emitted in the J/ψ → μ⁺μ⁻ decay, in three bins of J/ψ transverse momentum. While no differences are seen between the two states in terms of azimuthal decay angle distributions, they are observed to have significantly different polar anisotropies. The measurement favors a scenario where at least one of the two states is strongly polarized along the helicity quantization axis, in agreement with nonrelativistic quantum chromodynamics predictions. This is the first measurement of significantly polarized quarkonia produced at high transverse momentum