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Hafid H.,8 May 1945 University of Guelma | Hafid H.,University Larbi ben Mhidi dOum El Bouaghi | Hanane S.,British Petroleum | Saheb M.,University Larbi ben Mhidi dOum El Bouaghi | Houhamdi M.,8 May 1945 University of Guelma
Alauda | Year: 2013

Spatio-temporal dynamics of wintering Common Cranes Grus grus in Algeria: a ten year survey. A ten year survey of wintering Common Cranes was carried out in the high plateaus of Algeria (Oran, M'sila, Sétif and Oum El-Bouaghi). The distribution and abundance showed an obvious spatio-temporal variability. The trend in numbers of this species showed a stability in all sites (except in Oum El-Bouaghi where the abundance trend has accused a significant decrease). This should be the result of high human disturbance and, to a lesser extent, to higher winter temperatures particularly at Oum El-Bouaghi. Moreover, the decreasing winter numbers in Algeria coincided with a marked increase in numbers in winter in Europe (Spain and France). Common winter census in North Africa and in Europe are necessary to have a better knowledge of the species' population trend. Source


Mahdjoub A.,University Larbi ben Mhidi dOum El Bouaghi | Remache L.,University Larbi ben Mhidi dOum El Bouaghi | Moualkia H.,University Larbi ben Mhidi dOum El Bouaghi | Bordji B.,University Larbi ben Mhidi dOum El Bouaghi | Hafid A.,University Larbi ben Mhidi dOum El Bouaghi
Chalcogenide Letters | Year: 2015

A heterojunction based on cadmium sulfide (CdS) deposited on copper and indium selenide (CuInSe2) can be achieved by simple, easy to implement and low cost techniques. Homogeneous CuInSe2 layers were successfully deposited in an electrochemical way. The Raman and XRD analyses confirmed that the deposited films are mostly made of CuInSe2. Transmittance spectra analysis indicated that optical indices and gap energy correspond to those of CuInSe2. Chemical bath deposition of CdS onto CuInSe2 provides an heterojunction. I(V) characteristics of Ag/CdS/CuInSe2/Mo structure present a curve comparable to that of a silicon diode. Such a structure is then ready for photovoltaic application. Source

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