The idealized system of an atomically flat metallic surface [highly oriented pyrolytic graphite (HOPG)] and an organic monolayer (porphyrin) was used to determine whether the dielectric function and associated properties of thin films can be accessed with scanning–near-field scanning optical microscopy (s-NSOM). Here, we demonstrate the use of harmonics up to fourth order and the polarization d...

هدف: با توجه به رشد روزافزون آموزش شیوه مجازی و ویژه در شرایط گسترش پاندمی کرونایروس، نقش اساسی مدیریت کلاسی ارتقا کیفیت باید مورد قرار گیرد این پژوهش هدف تدوین مدل رابطه علّی هدفمند کلاس وضعیت روان‌شناختی پیامدهای تحصیلی دانشجویان انجام شد. روش: روش بر حسب هدف، کاربردی ماهیت از نوع توصیفی - همبستگی بود. جامعه آماری مشتمل انواع مقاطع دانشگاه­ های دولتی پیام نور شهر تهران نمونه اساس جدول مورگان ب...

Let G be a graph with adjacency matrix A(G) and let D(G) the diagonal of degrees G. For every real α ∈ [0, 1], Nikiforov [21] Wang et al. [26] defined matrices Aα(G) Lα(G), respectively, as = αD(G)+(1−α)A(G) Lα(G) αD(G)+(α − 1)A(G). In this paper, we obtain some relationships between eigenvalues these for families graphs, part Aα Lα-spectrum spider display Lα-characteristic polynomials when the...

Hulthen plus Hellmann potentials are adopted as the quark–antiquark interaction potential for studying thermodynamic properties and mass spectra of heavy mesons. The was rendered temperature dependent by replacing screening parameter with Debye mass. We solved radial Schrödinger equation analytically using Nikiforov–Uvarov method. energy eigenvalues corresponding wave function in terms Laguerre...

For a set of graphs F, let ex(n,F) and spex(n,F) denote the maximum number edges spectral radius an n-vertex F-free graph, respectively. Nikiforov (LAA, 2007) gave version Turán Theorem by showing that spex(n,Kk+1)=λ(Tk(n)), where Tk(n) is k-partite graph on n vertices. In same year, Feng, Yu Zhang (LAA) determined exact value spex(n,Ms+1), Ms+1 matching with s+1 edges. Recently, Alon Frankl (a...

In this paper, we study the finite temperature-dependent Schrödinger equation by using Nikiforov-Uvarov method. We consider sum of Cornell, inverse quadratic, and harmonic-type potentials as potential part radial equation. Analytical expressions for energy eigenvalues wave function are presented. Application results heavy quarkonia <msub...

We study analytically the two dimensional deformed bosonic oscillator equations for charged particles (both spin 0 and 1 particles) subject to effect of a uniform magnetic field. consider presence minimal uncertainty in momentum caused by Anti-deSitter model we use Nikiforov-Uvarov method solve system. The exact energy eigenvalues corresponding wave functions are obtained both Klein-Gordon scal...

The book graph $$B_n^{(k)}$$ consists of n copies Kk+1 joined along a common Kk. Ramsey numbers are known to have strong connections the classical cliques. Recently, first author determined asymptotic order these for fixed k, thus answering an old question Erdős, Faudree, Rousseau, and Schelp. In this paper, we provide simpler proof theorem. Next, author, present different that avoids use Szeme...