Canaux de Transmission de l’Effet des Transferts de Fonds des Migrants sur la Croissance Economique au Cameroun

The objective of this article is to determine the transmission channels of the effect of remittances on economic growth in Cameroon Based on the theoretical vision of the developmentalist school we estimated an ARDL model on time series data This estimate shows that remittances and financial development have a substitutability effect on economic growth in Cameroon in the long term Indeed migrant remittances compensate for the inefficiency of the credit markets in Cameroon allowing beneficiaries to accumulate financial resources to self-finance investment This result is in line with the conclusions of studies by Giuliano and Ruiz-Arranz 2009 However using the same method migrant remittances positively influence economic growth in Cameroon through the long-term investment channel The effect becomes more significant when interacting migrant remittances with the Cameroonian financial system Indeed remittances passing through formal channels open the possibility to unbanked beneficiaries to have the possibility of taking loans from financial institutions for the financing of economic activities in Cameroon Consequently it would be important for the public authorities to set up a mechanism for financing economic growth based on remittances from migrants interacting with the financial system in order to make productive investment

A distributed self-reconfiguration algorithm for cylindrical lattice-based modular robots

International audienceModular self-reconfigurable robots are composed of independent connected modules which can self-rearrange their connectivity using processing, communication and motion capabilities, in order to change the overall robot structure. In this paper, we consider rolling cylindrical modules arranged in a two-dimensional vertical hexagonal lattice. We propose a parallel, asynchronous and fully decentralized distributed algorithm to self-reconfigure robots from an initial configuration to a goal one. We evaluate our algorithm on the millimeter-scale cylindrical robots, developed in the Claytronics project, through simulation of large ensembles composed of up to ten thousand modules. We show the effectiveness of our algorithm and study its performance in terms of communications, movements and execution time. Our observations indicate that the number of communications, the number of movements and the execution time of our algorithm is highly predictable. Furthermore, we observe execution times that are linear in the size of the goal shape

An estimation of gravel mobility over an alpine river gravel bar (Arc en Maurienne, France) using PIT-tag tracers

River morphodynamics and sediment transportRiver morphology and morphodynamic

Anharmonicity and asymmetry of Landau levels for a two-dimensional electron gas

We calculate the density of states of a two dimensional electron gas located at the interface of a GaAlAs/GaAs heterojunction. The disorder potential which is generally created by a single doping layer behind a spacer, is here enhanced by the presence of a second delta doped layer of scatterers which can be repulsive or attractive impurities. We have calculated the density of states by means of the Klauder's approximation, in the presence of a magnetic field of arbitrary strength. At low field either band tails or impurity bands are observed for attractive potentials, depending on the impurity concentration. At higher field, impurity bands are observed for both repulsive and attractive potentials. We discuss the effect of such an asymmetrical density of states on the transport properties in the quantum Hall effect regime.Comment: 22 pages, 12 figures. submitted to Phys. Rev.

Influence of vegetation to boundary shear stress in open channel for overbank flow

River hydrodynamicsBed roughness and flow resistanc

Investigations on the Establishment of Uniform Flow in Compound Channel Flumes

Source: ICHE Conference Archive - https://mdi-de.baw.de/icheArchiv

A study on the use of the PACS bolometer arrays for submillimeter ground-based telescopes

A new kind of bolometric architecture has been successfully developed for the PACS photometer onboard the Herschel submillimeter observatory. These new generation CCD-like arrays are buttable and enable the conception of large fully sampled focal planes. We present a feasibility study of the adaptation of these bolometer arrays to ground-based submillimeter telescopes. We have developed an electro-thermal numerical model to simulate the performances of the bolometers under specific ground-based conditions (different wavelengths and background powers for example). This simulation permits to determine the optimal parameters for each condition and shows that the bolometers can be background limited in each transmission window between 200 and 450 microns. We also present a new optical system that enables to have a maximum absorption of the bolometer in each atmospheric windows. The description of this system and measurements are showed.Comment: 9 pages, 12 figures, to be published in the Proceedings of SPIE Vol. 6275, "Astronomical Telescopes and Instrumentation, Millimeter and Submillimeter Detectors and Instrumentation for Astronomy III