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Mezıou-Cheboutı</title> <meta name="description" content="Search results for: Nadjiba Mezıou-Cheboutı"> <meta name="keywords" content="Nadjiba Mezıou-Cheboutı"> <meta name="viewport" content="width=device-width, initial-scale=1, minimum-scale=1, maximum-scale=1, user-scalable=no"> <meta charset="utf-8"> <link href="https://cdn.waset.org/favicon.ico" type="image/x-icon" rel="shortcut icon"> <link href="https://cdn.waset.org/static/plugins/bootstrap-4.2.1/css/bootstrap.min.css" rel="stylesheet"> <link href="https://cdn.waset.org/static/plugins/fontawesome/css/all.min.css" rel="stylesheet"> <link href="https://cdn.waset.org/static/css/site.css?v=150220211555" rel="stylesheet"> </head> <body> <header> <div class="container"> <nav class="navbar navbar-expand-lg navbar-light"> <a class="navbar-brand" href="https://waset.org"> <img src="https://cdn.waset.org/static/images/wasetc.png" alt="Open Science Research Excellence" title="Open Science Research Excellence" /> </a> <button class="d-block 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action="https://publications.waset.org/abstracts/search"> <div id="custom-search-input"> <div class="input-group"> <i class="fas fa-search"></i> <input type="text" class="search-query" name="q" placeholder="Author, Title, Abstract, Keywords" value="Nadjiba Mezıou-Cheboutı"> <input type="submit" class="btn_search" value="Search"> </div> </div> </form> </div> </div> <div class="row mt-3"> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Commenced</strong> in January 2007</div> </div> </div> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Frequency:</strong> Monthly</div> </div> </div> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Edition:</strong> International</div> </div> </div> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Paper Count:</strong> 9</div> </div> </div> </div> <h1 class="mt-3 mb-3 text-center" style="font-size:1.6rem;">Search results for: Nadjiba Mezıou-Cheboutı</h1> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">9</span> Physico-Chemical Characterization of the Essential Oil of Daucus carota</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Nassima%20Behidj-Benyounes">Nassima Behidj-Benyounes</a>, <a href="https://publications.waset.org/abstracts/search?q=Thoraya%20Dahmene"> Thoraya Dahmene</a>, <a href="https://publications.waset.org/abstracts/search?q=Khaled%20Benyounes%20Nadjiba%20Chebouti1and%20F%2FZohra%20Bissaad"> Khaled Benyounes Nadjiba Chebouti1and F/Zohra Bissaad</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Essential oils have a significant antimicrobial activity. These oils can successfully replace the antibiotics. So, the microorganisms show their inefficiencies resistant for the antibiotics. For this reason, we study the physicochemical analysis and antimicrobial activity of the essential oil of Daucus carota. The extraction is done by steam distillation of water which brought us a very significant return of 4.65%. The analysis of the essential oil is performed by GC/MS and has allowed us to identify 32 compounds in the oil of D. carota flowering tops of Bouira. Three of which are in the majority are the α-pinene (22.3%), the carotol (21.7%) and the limonene (15.8%). <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Daucus%20carota" title="Daucus carota">Daucus carota</a>, <a href="https://publications.waset.org/abstracts/search?q=essential%20oil" title=" essential oil"> essential oil</a>, <a href="https://publications.waset.org/abstracts/search?q=%CE%B1-pinene" title=" α-pinene"> α-pinene</a>, <a href="https://publications.waset.org/abstracts/search?q=carotol" title=" carotol"> carotol</a>, <a href="https://publications.waset.org/abstracts/search?q=limonene" title=" limonene"> limonene</a> </p> <a href="https://publications.waset.org/abstracts/17207/physico-chemical-characterization-of-the-essential-oil-of-daucus-carota" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/17207.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">389</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">8</span> Antimicrobial Activity of Oil Extracted from the Almonds of the Fruits of Argania spinosa in the West of Algeria (Mostaganem)</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Nassima%20Behidj-Benyounes">Nassima Behidj-Benyounes</a>, <a href="https://publications.waset.org/abstracts/search?q=Nadjiba%20Chebouti"> Nadjiba Chebouti</a>, <a href="https://publications.waset.org/abstracts/search?q=Thoraya%20Dahmane"> Thoraya Dahmane</a>, <a href="https://publications.waset.org/abstracts/search?q=Amina%20Henni"> Amina Henni </a> </p> <p class="card-text"><strong>Abstract:</strong></p> This work examines the study of the antimicrobrial effect of oil extracted from the seeds of Argania spinosa L. (Sapotaceae) in the area of Stida (Mostaganem). This natural substance is extracted by using the Soxhlet. The antimicrobial activity of this oil is evaluated on several microorganisms. It has been tested on five bacterial strains; Escherichia coli, Pseudomonas aeruginosa, Klebsiella pneumoniae, Bacillus subtilis and Staphylococcus aureus. The extract has been studied by using Candida albicans. It should be noted that these agents are characterized by a high frequency of contamination and pathogenicity. Through this study, we note that these microorganisms are moderately sensitive to the argan oil. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Argania%20spinosa" title="Argania spinosa">Argania spinosa</a>, <a href="https://publications.waset.org/abstracts/search?q=oil" title=" oil"> oil</a>, <a href="https://publications.waset.org/abstracts/search?q=several%20microorganisms" title=" several microorganisms"> several microorganisms</a>, <a href="https://publications.waset.org/abstracts/search?q=almonds" title=" almonds"> almonds</a>, <a href="https://publications.waset.org/abstracts/search?q=antimicrobial%20activity" title=" antimicrobial activity"> antimicrobial activity</a> </p> <a href="https://publications.waset.org/abstracts/8822/antimicrobial-activity-of-oil-extracted-from-the-almonds-of-the-fruits-of-argania-spinosa-in-the-west-of-algeria-mostaganem" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/8822.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">416</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">7</span> Chemical Composition Pistachio Harvested Bechloul (Algeria)</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Nadjiba%20Mez%C4%B1ou-Chebout%C4%B1">Nadjiba Mezıou-Cheboutı</a>, <a href="https://publications.waset.org/abstracts/search?q=Amel%20Merabet"> Amel Merabet</a>, <a href="https://publications.waset.org/abstracts/search?q=Yahia%20Chebout%C4%B1"> Yahia Cheboutı</a>, <a href="https://publications.waset.org/abstracts/search?q=Nassima%20Behidj">Nassima Behidj</a>, <a href="https://publications.waset.org/abstracts/search?q=Fatima-Zohra%20B%C4%B1ssaad%20et%20Salahedine%20Doumandj%C4%B1"> Fatima-Zohra Bıssaad et Salahedine Doumandjı </a> </p> <p class="card-text"><strong>Abstract:</strong></p> Among the Anacardiaceae, the fruit (Pistacia vera L.) is the only species that produces edible fruits. The introduction of real pistachio was made in the early sixties by an FAO program in Algeria in several regions in the northern part of Algeria: Tlemcen, Sidi Bel Abbes, Batna, Bouira M'sila . Chemical analyzes of seeds pistachios were made on seeds from an orchard that localizes to Bechloul (Bouira) located in bioclimatic sub-humid temperate winter floor. Analyzes reveal dry matter content of 3.60 ± 0.45%, the water rate is 7.21 ± 0.36%. However, the fat content is 46.00 ± 0.90%, in average blood sugar, it is 4.02 ± 0.47%, the protein reached 29.88 ± 0.76%. Given the very interesting that high-fat food nutritional values, culture pistachio must be considered for its extension in Algeria. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=pistachio" title="pistachio">pistachio</a>, <a href="https://publications.waset.org/abstracts/search?q=dry%20matter" title=" dry matter"> dry matter</a>, <a href="https://publications.waset.org/abstracts/search?q=fat" title=" fat"> fat</a>, <a href="https://publications.waset.org/abstracts/search?q=sugar" title=" sugar"> sugar</a>, <a href="https://publications.waset.org/abstracts/search?q=protein" title=" protein"> protein</a> </p> <a href="https://publications.waset.org/abstracts/13931/chemical-composition-pistachio-harvested-bechloul-algeria" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/13931.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">355</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">6</span> The Chemical Composition of the Pistachio (Pistacia vera) Harvested Bechloul (Algeria)</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Nadjiba%20Meziou-Chebouti">Nadjiba Meziou-Chebouti</a>, <a href="https://publications.waset.org/abstracts/search?q=Amel%20Merabet"> Amel Merabet</a>, <a href="https://publications.waset.org/abstracts/search?q=Yahia%20Chebouti"> Yahia Chebouti</a>, <a href="https://publications.waset.org/abstracts/search?q=Nassima%20Behidj"> Nassima Behidj</a>, <a href="https://publications.waset.org/abstracts/search?q=Salahedine%20Doumandji"> Salahedine Doumandji</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Among the Anacardiaceae, the fruit (Pistacia vera L.) is the only species that produces edible fruits. The introduction of real pistachio was made in the early sixties by an FAO program in Algeria in several regions in the northern part of Algeria: Tlemcen, Sidi Bel Abbes, Batna, Bouira M'sila. Chemical analyzes of seeds pistachios were made on seeds from an orchard that localizes to Bechloul (Bouira) located in bioclimatic sub-humid temperate winter floor. Analyzes reveal dry matter content of 3.60±0.45%, the water rate is 7.21±0.36%. However, the fat content is 46.00±0.90%, in average blood sugar, it is 4.02±0.47%, the protein reached 29.88±0.76%. Given the very interesting that high-fat food nutritional values, culture pistachio must be considered for its extension in Algeria. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=pistachio" title="pistachio">pistachio</a>, <a href="https://publications.waset.org/abstracts/search?q=dry%20matter" title=" dry matter"> dry matter</a>, <a href="https://publications.waset.org/abstracts/search?q=fat" title=" fat"> fat</a>, <a href="https://publications.waset.org/abstracts/search?q=sugar" title=" sugar"> sugar</a>, <a href="https://publications.waset.org/abstracts/search?q=protein" title=" protein"> protein</a> </p> <a href="https://publications.waset.org/abstracts/22954/the-chemical-composition-of-the-pistachio-pistacia-vera-harvested-bechloul-algeria" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/22954.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">368</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">5</span> Effect of Two Entomopathogenic Fungi Beauveria bassiana and Metarhizium anisopliae var. acridum on the Haemolymph of the Desert Locust Schistocerca gregaria</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Fatima%20Zohra%20Bissaad">Fatima Zohra Bissaad</a>, <a href="https://publications.waset.org/abstracts/search?q=Farid%20Bounaceur"> Farid Bounaceur</a>, <a href="https://publications.waset.org/abstracts/search?q=Nassima%20Behidj"> Nassima Behidj</a>, <a href="https://publications.waset.org/abstracts/search?q=Nadjiba%20Chebouti"> Nadjiba Chebouti</a>, <a href="https://publications.waset.org/abstracts/search?q=Fatma%20Halouane"> Fatma Halouane</a>, <a href="https://publications.waset.org/abstracts/search?q=Bahia%20Doumandji-Mitiche"> Bahia Doumandji-Mitiche</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Effect of <em>Beauveria bassiana</em> and <em>Metarhizium anisopliae</em> var. <em>acridum</em> on the 5<sup>th </sup>instar nymphs of <em>Schistocerca gregaria</em> was studied in the laboratory. Infection by these both entomopathogenic fungi caused reduction in the hemolymph total protein. The average amounts of total proteins were 2.3, 2.07, 2.09 µg/100 ml of haemolymph in the control and <em>M. anisopliae </em>var. <em>acridum</em>, and <em>B. bassiana</em> based-treatments, respectively. Three types of haemocytes were recognized and identified as prohaemocytes, plasmatocytes and granulocytes. The treatment caused significant reduction in the total haemocyte count and in each haemocyte type on the 9<sup>th</sup> day after its application. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Beauveria%20bassiana" title="Beauveria bassiana">Beauveria bassiana</a>, <a href="https://publications.waset.org/abstracts/search?q=haemolymph%20picture" title=" haemolymph picture"> haemolymph picture</a>, <a href="https://publications.waset.org/abstracts/search?q=haemolymph%20protein" title=" haemolymph protein"> haemolymph protein</a>, <a href="https://publications.waset.org/abstracts/search?q=Metarhizium%20anisopliae%20var.%20acridum" title=" Metarhizium anisopliae var. acridum"> Metarhizium anisopliae var. acridum</a>, <a href="https://publications.waset.org/abstracts/search?q=Schistocerca%20gregaria" title=" Schistocerca gregaria"> Schistocerca gregaria</a> </p> <a href="https://publications.waset.org/abstracts/16594/effect-of-two-entomopathogenic-fungi-beauveria-bassiana-and-metarhizium-anisopliae-var-acridum-on-the-haemolymph-of-the-desert-locust-schistocerca-gregaria" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/16594.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">479</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">4</span> 3D Simulation for Design and Predicting Performance of a Thermal Heat Storage Facility using Sand </h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Nadjiba%20Mahfoudi">Nadjiba Mahfoudi</a>, <a href="https://publications.waset.org/abstracts/search?q=Abdelhafid%20Moummi"> Abdelhafid Moummi </a>, <a href="https://publications.waset.org/abstracts/search?q=Mohammed%20El%20Ganaoui"> Mohammed El Ganaoui</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Thermal applications are drawing increasing attention in the solar energy research field, due to their high performance in energy storage density and energy conversion efficiency. In these applications, solar collectors and thermal energy storage systems are the two core components. This paper presents a thermal analysis of the transient behavior and storage capability of a sensible heat storage device in which sand is used as a storage media. The TES unit with embedded charging tubes is connected to a solar air collector. To investigate it storage characteristics a 3D-model using no linear coupled partial differential equations for both temperature of storage medium and heat transfer fluid (HTF), has been developed. Performances of thermal storage bed of capacity of 17 MJ (including bed temperature, charging time, energy storage rate, charging energy efficiency) have been evaluated. The effect of the number of charging tubes (3 configurations) is presented. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=design" title="design">design</a>, <a href="https://publications.waset.org/abstracts/search?q=thermal%20modeling" title=" thermal modeling"> thermal modeling</a>, <a href="https://publications.waset.org/abstracts/search?q=heat%20transfer%20enhancement" title=" heat transfer enhancement"> heat transfer enhancement</a>, <a href="https://publications.waset.org/abstracts/search?q=sand" title=" sand"> sand</a>, <a href="https://publications.waset.org/abstracts/search?q=sensible%20heat%20storage" title=" sensible heat storage "> sensible heat storage </a> </p> <a href="https://publications.waset.org/abstracts/20693/3d-simulation-for-design-and-predicting-performance-of-a-thermal-heat-storage-facility-using-sand" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/20693.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">561</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">3</span> The Antimicrobrial Effect of Alkaloids (Harmin, Harmalin) Extracted from Peganum harmala (L) Seeds in the South of Algeria (Bousaada)</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Nassima%20Behidj-Benyounes">Nassima Behidj-Benyounes</a>, <a href="https://publications.waset.org/abstracts/search?q=Thoraya%20Dahmene"> Thoraya Dahmene</a>, <a href="https://publications.waset.org/abstracts/search?q=Nadjiba%20Chebout"> Nadjiba Chebout </a> </p> <p class="card-text"><strong>Abstract:</strong></p> This work examines the study of the antimicrobrial effect of alkaloids extracted from the seeds of Peganum harmala L (Zygophyllaceae). This natural substance is extracted by using different solvents (aqueous, ethanolic, and hexane). The evaluation of the antimicrobial activity has only dealt with alkaloids. The antimicrobial effect of alkaloids is evaluated on several microorganisms. It has been tested on eight bacterial strains. The extract has been studied by using two yeasts. Finally, three molds have been studied. It should be noted that these agents are characterized by a high frequency of contamination and pathogenicity. Through this study, we note that Staphylococcus aureus, Saccharomyces cerievisae and E. coli are very sensitive in respect of the ethanol extract. Pseudomonas aerogenosa and Penicillium sp. are resistant to this extract. The other microorganisms are moderately sensitive. The study of the antimicrobial activity of different extracts of the Harmel has shown an optimal activity with the ethanol extract. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Peganum%20harmala%20L." title="Peganum harmala L.">Peganum harmala L.</a>, <a href="https://publications.waset.org/abstracts/search?q=seeds" title=" seeds"> seeds</a>, <a href="https://publications.waset.org/abstracts/search?q=alkaloids" title=" alkaloids"> alkaloids</a>, <a href="https://publications.waset.org/abstracts/search?q=bacteria" title=" bacteria"> bacteria</a>, <a href="https://publications.waset.org/abstracts/search?q=fungi" title=" fungi"> fungi</a>, <a href="https://publications.waset.org/abstracts/search?q=yeast" title=" yeast"> yeast</a>, <a href="https://publications.waset.org/abstracts/search?q=antimicrobial%20activity" title=" antimicrobial activity"> antimicrobial activity</a> </p> <a href="https://publications.waset.org/abstracts/1737/the-antimicrobrial-effect-of-alkaloids-harmin-harmalin-extracted-from-peganum-harmala-l-seeds-in-the-south-of-algeria-bousaada" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/1737.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">400</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">2</span> Elaboration and Characterization of a Composite Based on Plant Sisal Fiber</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Biskri%20Yasmina">Biskri Yasmina</a>, <a href="https://publications.waset.org/abstracts/search?q=Laidi%20Babouri"> Laidi Babouri</a>, <a href="https://publications.waset.org/abstracts/search?q=Dehas%20Ouided"> Dehas Ouided</a>, <a href="https://publications.waset.org/abstracts/search?q=Bougherira%20Nadjiba"> Bougherira Nadjiba</a>, <a href="https://publications.waset.org/abstracts/search?q=Baghloul%20Rahima"> Baghloul Rahima</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Algeria is one of the countries which have extraordinary resources in vegetable fibers (Palmier, Alfa, Cotton, Sisal). Unfortunately, their valorization in the practical fields, among other things, in building materials, is still little exploited. Several works align with the fact that the use of plant fibers in mortar is an advantageous solution, given its abundance and its socio-economic and environmental impact. The idea of introducing plant fiber into the field of Civil Engineering is not new. Based on the work of several researchers in this field, we propose to study the mechanical behavior of mortar based on Sisal fibers. This work consists of the experimental characterization in the fresh state (workability) and in the hardened state (mechanical resistance to compression and traction by three-point bending) on the scale of mortar mortars based on sisal plant fibers. The main objective of this work is the study of the effect of fiber incorporation on mechanical properties (compressive strength and three-point bending strength). In this study, we varied two parameters, such as the length of the fiber (7cm, 10 cm) and the fibers percentage (0.25%, 0.5%, 0.75%, 1%, 1.25% and 1.5%). The results show that there is a slight increase in the compressive strength of the fiber-reinforced mortars compared to the reference mortar (mortar without fibers). With regard to the three-point bending tests, the fiber-reinforced mortars presented higher resistances compared to the reference mortar and this was for the different lengths and different percentages studied. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=mortar" title="mortar">mortar</a>, <a href="https://publications.waset.org/abstracts/search?q=plant%20fiber" title=" plant fiber"> plant fiber</a>, <a href="https://publications.waset.org/abstracts/search?q=experimentation" title=" experimentation"> experimentation</a>, <a href="https://publications.waset.org/abstracts/search?q=mechanical%20characterization" title=" mechanical characterization"> mechanical characterization</a>, <a href="https://publications.waset.org/abstracts/search?q=analysis" title=" analysis"> analysis</a> </p> <a href="https://publications.waset.org/abstracts/166675/elaboration-and-characterization-of-a-composite-based-on-plant-sisal-fiber" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/166675.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">94</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">1</span> Imputation of Incomplete Large-Scale Monitoring Count Data via Penalized Estimation</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Mohamed%20%20Dakki">Mohamed Dakki</a>, <a href="https://publications.waset.org/abstracts/search?q=Genevieve%20Robin"> Genevieve Robin</a>, <a href="https://publications.waset.org/abstracts/search?q=Marie%20Suet"> Marie Suet</a>, <a href="https://publications.waset.org/abstracts/search?q=Abdeljebbar%20Qninba"> Abdeljebbar Qninba</a>, <a href="https://publications.waset.org/abstracts/search?q=Mohamed%20A.%20El%20Agbani"> Mohamed A. El Agbani</a>, <a href="https://publications.waset.org/abstracts/search?q=Asm%C3%A2a%20%20Ouassou"> Asmâa Ouassou</a>, <a href="https://publications.waset.org/abstracts/search?q=Rhimou%20El%20Hamoumi"> Rhimou El Hamoumi</a>, <a href="https://publications.waset.org/abstracts/search?q=Hichem%20Azafzaf"> Hichem Azafzaf</a>, <a href="https://publications.waset.org/abstracts/search?q=Sami%20Rebah"> Sami Rebah</a>, <a href="https://publications.waset.org/abstracts/search?q=Claudia%20Feltrup-Azafzaf"> Claudia Feltrup-Azafzaf</a>, <a href="https://publications.waset.org/abstracts/search?q=Nafouel%20%20Hamouda"> Nafouel Hamouda</a>, <a href="https://publications.waset.org/abstracts/search?q=Wed%20a.L.%20Ibrahim"> Wed a.L. Ibrahim</a>, <a href="https://publications.waset.org/abstracts/search?q=Hosni%20H.%20%20Asran"> Hosni H. Asran</a>, <a href="https://publications.waset.org/abstracts/search?q=Amr%20A.%20%20Elhady"> Amr A. Elhady</a>, <a href="https://publications.waset.org/abstracts/search?q=Haitham%20Ibrahim"> Haitham Ibrahim</a>, <a href="https://publications.waset.org/abstracts/search?q=Khaled%20Etayeb"> Khaled Etayeb</a>, <a href="https://publications.waset.org/abstracts/search?q=Essam%20Bouras"> Essam Bouras</a>, <a href="https://publications.waset.org/abstracts/search?q=Almokhtar%20Saied"> Almokhtar Saied</a>, <a href="https://publications.waset.org/abstracts/search?q=Ashrof%20Glidan"> Ashrof Glidan</a>, <a href="https://publications.waset.org/abstracts/search?q=Bakar%20M.%20Habib"> Bakar M. Habib</a>, <a href="https://publications.waset.org/abstracts/search?q=Mohamed%20S.%20Sayoud"> Mohamed S. Sayoud</a>, <a href="https://publications.waset.org/abstracts/search?q=Nadjiba%20Bendjedda"> Nadjiba Bendjedda</a>, <a href="https://publications.waset.org/abstracts/search?q=Laura%20Dami"> Laura Dami</a>, <a href="https://publications.waset.org/abstracts/search?q=Clemence%20Deschamps"> Clemence Deschamps</a>, <a href="https://publications.waset.org/abstracts/search?q=Elie%20Gaget"> Elie Gaget</a>, <a href="https://publications.waset.org/abstracts/search?q=Jean-Yves%20Mondain-Monval"> Jean-Yves Mondain-Monval</a>, <a href="https://publications.waset.org/abstracts/search?q=Pierre%20Defos%20Du%20Rau"> Pierre Defos Du Rau</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In biodiversity monitoring, large datasets are becoming more and more widely available and are increasingly used globally to estimate species trends and con- servation status. These large-scale datasets challenge existing statistical analysis methods, many of which are not adapted to their size, incompleteness and heterogeneity. The development of scalable methods to impute missing data in incomplete large-scale monitoring datasets is crucial to balance sampling in time or space and thus better inform conservation policies. We developed a new method based on penalized Poisson models to impute and analyse incomplete monitoring data in a large-scale framework. The method al- lows parameterization of (a) space and time factors, (b) the main effects of predic- tor covariates, as well as (c) space–time interactions. It also benefits from robust statistical and computational capability in large-scale settings. The method was tested extensively on both simulated and real-life waterbird data, with the findings revealing that it outperforms six existing methods in terms of missing data imputation errors. Applying the method to 16 waterbird species, we estimated their long-term trends for the first time at the entire North African scale, a region where monitoring data suffer from many gaps in space and time series. This new approach opens promising perspectives to increase the accuracy of species-abundance trend estimations. We made it freely available in the r package ‘lori’ (https://CRAN.R-project.org/package=lori) and recommend its use for large- scale count data, particularly in citizen science monitoring programmes. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=biodiversity%20monitoring" title="biodiversity monitoring">biodiversity monitoring</a>, <a href="https://publications.waset.org/abstracts/search?q=high-dimensional%20statistics" title=" high-dimensional statistics"> high-dimensional statistics</a>, <a href="https://publications.waset.org/abstracts/search?q=incomplete%20count%20data" title=" incomplete count data"> incomplete count data</a>, <a href="https://publications.waset.org/abstracts/search?q=missing%20data%20imputation" title=" missing data imputation"> missing data imputation</a>, <a href="https://publications.waset.org/abstracts/search?q=waterbird%20trends%20in%20North-Africa" title=" waterbird trends in North-Africa"> waterbird trends in North-Africa</a> </p> <a href="https://publications.waset.org/abstracts/137277/imputation-of-incomplete-large-scale-monitoring-count-data-via-penalized-estimation" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/137277.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">156</span> </span> </div> </div> </div> </main> <footer> <div id="infolinks" class="pt-3 pb-2"> <div class="container"> <div style="background-color:#f5f5f5;" class="p-3"> <div class="row"> <div class="col-md-2"> <ul class="list-unstyled"> About <li><a href="https://waset.org/page/support">About Us</a></li> <li><a href="https://waset.org/page/support#legal-information">Legal</a></li> <li><a target="_blank" rel="nofollow" href="https://publications.waset.org/static/files/WASET-16th-foundational-anniversary.pdf">WASET celebrates its 16th 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