With the growth of the Internet and its increasing globalization, much thought has been given to the evolution of the network number allocation and assignment process. RFC 1174, "Identifier Assignment and Connected Status", dated August 1990 recommends that the Internet Registry (IR) continue as the principal registry for network numbers; however, the IR may allocate blocks of network numbers a...

Here, new N,N′-dipyridoxyl(4,4''-diaminodiphenylether) Schiff-base ligand has been synthesized and characterized by IR, 1H NMR and mass spectrometry. Also, geometry optimization and theoretical assignment of IR spectrum of the ligand have been computed by employing density functional theory (DFT) method. Two pyridine rings and benzene rings in the bridge region are not in the same plane. The ca...

The pair 〈Θ, P 〉 of a pointset Θ ⊂ IR and a polynomial space P on IR is correct if the restriction map P → IR : p 7→ p|Θ is invertible, i.e., if there is, for any f defined on Θ, a unique p ∈ P which matches f on Θ. We discuss here a particular assignment Θ 7→ ΠΘ, introduced in [3], for which 〈Θ,ΠΘ〉 is always correct, and provide an algorithm for the contruction of a basis for ΠΘ which is relat...

Rigid cyclo-FF peptide aggregates have been studied under isolated conditions using a molecular beam-laser desorption setup. Far-IR action spectroscopy provided highly diagnostic spectra, allowing the assignment of various ladder-like conformations.

The Raman and infrared (IR) spectra for the alkali metaphosphate crystals composed of Q2 units pyrophosphate crystal Q1 were assessed by density functional theory calculations. assignments peaks calculated IR consistent with reported phosphate glasses except assignment around 1100 cm?1 crystals. Peaks have been assigned to asymmetric stretching vibrations bonds between phosphorus atoms non-brid...

A systematic vibrational spectroscopic assignment and analysis of pregabalin has been carried out by using FTIR, FT-Raman spectral data. The vibrational analysis were aided by electronic structure calculations-hybrid density functional methods (B3LYP) performed with 631G(d,p) basis set. Molecular equilibrium geometries, electronic energies, natural bond order analysis, IR intensities, and harmo...

The synthesis of N-acetyl derivatives of α-amino acids (L–Gly, L–Val, L–Phe, L–Ile, L–Pro and L–Cys) using a simple and efficient method for preparation was carried out. The N-acetyl derivatives were obtained using acetic anhydride in basic conditions at room temperature. The methyl amides of N–acetyl amino acid were synthesized by mixed anhydride procedure using a Piv–Cl as a reagent. The conv...

We have studied the Fourier Transform Infrared (FT-IR) and the Fourier transform Raman (FT-Raman) spectra of stanozolol and oxandrolone, and we have performed quantum chemical calculations based on the density functional theory (DFT) with a B3LYP/6-31G (d, p) level of theory. The FT-IR and FT-Raman spectra were collected in a solid phase. The consistency between the calculated and experimental ...

Till now low-level winds were retrieved using Kalpana-1 infrared (IR) images only. In this paper, an attempt has been made to retrieve low-level cloud motion vectors using Kalpana-1 visible (VIS) images at every half an hour. The VIS channel provides better detection of low level clouds, which remain obscure in thermal IR images due to poor thermal contrast. The tracers are taken to be 15× 15 p...

The chemical activity of oxygen vacancies on well-defined, single-crystal CeO2(111)-surfaces is investigated using CO as a probe molecule. Since no previous measurements are available, the assignment of the CO ν1 stretch frequency as determined by IR-spectroscopy for the stoichiometric and defective surfaces are aided by ab initio electronic structure calculations using density functional theor...