(iv) un = (a b)/(a b), yn = a + £. If i4 = £ = 1, then un, Vn are the Fibonacci and Lucas sequences, respectively. If A = 3 and 5 =-2, then un, t;n are the Mersenne and Fermat sequences, respectively. If A = 2 and 5 = 1 (so that Z? = 8), then un is called the Pell sequence (see [4, p. 187]), and is denoted Pn; vn may be called the secondary Pell sequence, and denoted i?n, following [7]. For the...

T) = 2.4 +0.4 DAYS electrostatic interaction between Sf and 6d electrons removes the degeneracy in the total angular momentum. Thus under this approximation the ground-state wave function is ('Ds/s I4) ti/s giving a g value of 0.6547 if diamagnetic corrections and the relativistic breakdown of Russell-Saunders coupling are neglected. The authors wish to acknowledge their indebtedness to J. L. W...

Tujuan penelitian ini adalah untuk mendeskripsikan kemampuan penalaran matematis siswa dalam menyelesaikan soal cerita aljabar. Adapun indikator panalaran yang diukur meliputi menyajikan penyataan matematika secara tertulis (I1), mangajukan dugaan (I2), melakukan manipulasi (I3), dan menarik kesimpulan (I4). Penelitian merupakan jenis deskriptif kualitatif dengan subjek kelas VIII SMP IT El-Yas...

La2-xNdxCuO3.5 (x ? 0.5) compounds have been synthesized by a topotactic reduction reaction with calcium hydride at 280 °C for 48 h. Structural, thermal, vibrational and magnetic properties of were studied X-ray powder diffraction (XRD), differential thermal analysis (DTA) temperature dependent X ray (TDXD), Raman spectroscopy electronic paramagnetic resonance. The oxidation the 400 24 h kineti...

Using density functional theory together with Monte Carlo simulations, we demonstrate that epitaxial strain, both compressive and tensile, attenuates the spin frustration of double perovskite ${\mathrm{Sr}}_{2}\mathrm{Fe}\mathrm{Os}{\mathrm{O}}_{6}$ to significantly enhance critical temperature 310 K, enabling room-temperature applications. We discover under tensile strain a tetragonal ($I4/m$)...

Three-dimensional hybrid organic–inorganic lead halide perovskites are promising photovoltaic and light-emitting materials. A key phenomenon relevant for their optoelectronic applications is electron–phonon coupling. Since it can be strongly modified by structural deformation changes in the dynamics of molecular cations, great importance to study temperature dependence phonon properties perovsk...

Potatoes are a high-value crop with shallow root system and high fertilizer requirements. The primary emphasis in potato production is minimizing nitrogen-leaching losses from the zone through fertigation. Therefore, field experiment was conducted for two consecutive years, 2018–2019 2019–2020 to assess effect of nitrogen irrigation amount frequency on tuber yield, water balance components prod...