In this paper, we address the problem of designing time hopping codes for multiple access communication impulse radio systems. Time hopping techniques are first reviewed, and performance in terms of correlation properties and Power Spectral Density are given. A new family of time hopping codes is presented, and performance are derived. Finally, advantages and disadvantages of different time hop...

The FT-IR and Raman spectra of 4-Chloro-2-Fluroaniline (4C2FA) were measured. The fundamental vibrational frequencies and intensity of vibrational bands were evaluated using density functional theory (DFT) and standard B3LYP/6-311+G** basis set combination. The vibrational spectra were interpreted, with the aid of normal coordinate analysis based on a scaled quantum mechanical (SQM) force field...

Department of Chemistry, NIS Centre and Turin, Via P. Giuria 7, Turin, 10125 Italy. E Haldor Topsøe A/S, Haldor Topsøes Allé 1, European Synchrotron Radiation Facility, 71 Cedex 9, 38043 France IRC “Smart Materials”, Southern Federal 344090 Russia Department of Chemistry, CrisDi Centre an Turin, Via P. Giuria 7, Turin, 10125 Italy † Electronic supplementary information ( synthesis details, expe...

Saponite is a trioctahedral 2:1 smectite with the ideal composition MxMg3AlxSi4−xO10(OH,F)2.nH2O (M = interlayer cation). Both success of saponite synthesis and determination its applications depends on robust knowledge structure saponite. Among routine characterization techniques, spectroscopic methods are most common. This review, thus, provides an overview various to characterize natural syn...

objective: the aim of the present study is assessment of insulin resistance (ir) in obese women by tyg-index and compared with the homa-ir index. materials and methods: this cross-sectional study was performed on 61 obese women aged 18-45 years. weights, height, waist circumference (wc) were measured and body mass index (bmi) was calculated and recorded. a sample of fasting serum was collected ...

The application of IR 786 perchlorate (IR-786) as a selective optical sensor for cyanide anion in both organic solution (acetonitrile (MeCN), 100%) and solvent-free solid surfaces was demonstrated. In MeCN, IR-786 was selective to two anions in the following order: CN(-) > OH(-). A significant change in the characteristic dark green color of IR-786 in MeCN to yellow was observed as a result of ...

one of the questions that has been ignored in letter of credit is a problem of assignment of proceeds in letter of credit that has been discussed generally below the transfer of lc subject, but has differed with it. so in this article, the author has tried to use the words assignment and transfer exactly in their place to clear the existent differences. at first, the writer’s hypothesis was tha...

A method for solving the descriptor discrete-time linear system is focused. For easily, it is converted to a standard discrete-time linear system by the definition of a derivative state feedback. Then partial eigenvalue assignment is used for obtaining state feedback and solving the standard system. In partial eigenvalue assignment, just a part of the open loop spectrum of the standard linear s...

there is not adequate information available about traditional instruction system in the field of visual arts in the pre-modern period. instruction of calligraphy can be considered as traditional instruction of art in a way that its guidelines and instructional texts are remained almost intact. instruction of calligraphy is implemented in aprofessor-student procedure and is accompanied with vari...