This paper proposes the use of a LoRa like chirp spread spectrum physical layer as basis for new Power Line Communication modulation scheme suited low-bandwidth communication. It is shown that robust communication can be established even in channels exhibiting extreme multipath interference, impulsive noise and low SNR (−40 dB), with synchronisation requirements relaxed compared to conventional...

Motivated by the analytical predictions of [12, 13], we report numerical evidence showing that in driven incompressible magnetohydrodynamic turbulence, magneticand velocity-field fluctuations locally tend to align their polarization vectors. This dynamic alignment is stronger at smaller scales with the angular mismatch between the polarizations decreasing with the scale, λ, approximately as θλ ...

Numerical wave modeling in oceanic and coastal waters is usually based on a phase-averaged approach (spectral models), whereas close to shore, in the surf zone and in harbors, it is usually based on a phase-resolving approach (time domain models). Both approaches can be formulated in terms of the energy and phase spectrum of the waves. In the present project we are developing a model in which b...

the relationship between some habitat factors and fish assemblage was analyzed in the taleghan river, alborz province, iran. fish specimens from thirty-three sites were sampled by electrofishing device in october 2014. the habitat parameters, including elevation (m), water depth (cm), river width (m), river slope (%), current velocity (m.s-1), number of large stone (> 15 cm), average stone diam...

A Doppler signal converter has been developed to facilitate cardiovascular and exercise physiology research. This device directly converts audio signals from a clinical Doppler ultrasound imaging system into a real-time analog signal that accurately represents blood flow velocity and is easily recorded by any standard data acquisition system. This real-time flow velocity signal, when simultaneo...

In real applications the velocity eld of a ow is not available in analytical but in discrete form. One goal of this paper is to analyze particle integration methods for discretized data deened on meshes with regard to numerical eeciency and accuracy. Careful error analysis of the particle tracing process relates the error of velocity interpolation in space and time to the error of the numerical...

This paper provides a history of the development Harold Hochman and James Rodgers’ (1969) theory Pareto optimal redistribution, which modeled income transfers as public good. redistribution provided an economic efficiency case for policy. After reviewing emergence at University Virginia its elaboration Urban Institute in early 1970s, describes M. Buchanan’s efforts to grapple with his colleague...

The peculiar motions of galaxies can be used to infer the distribution of matter in the Universe. It has recently been shown that measurements of the peculiar velocity field indicates an anomalously high bulk flow of galaxies in our local volume. In this paper we find the implications of the high bulk flow for the power spectrum of density fluctuations. We find that analyzing only the dipole mo...