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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> 19</div> </div> </div> </div> <h1 class="mt-3 mb-3 text-center" style="font-size:1.6rem;">Search results for: Chaimae Ramdani</h1> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">19</span> Chemical Composition and Insecticidal Properties of Moroccan Plant Extracts against Dactylopius Opuntiae (Cockerell) Under Laboratory and Greenhouse Conditions</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Imane%20Naboulsi">Imane Naboulsi</a>, <a href="https://publications.waset.org/abstracts/search?q=Mansour%20Sobeh"> Mansour Sobeh</a>, <a href="https://publications.waset.org/abstracts/search?q=Rachid%20Lamzira"> Rachid Lamzira</a>, <a href="https://publications.waset.org/abstracts/search?q=Karim%20El%20Fakhouri"> Karim El Fakhouri</a>, <a href="https://publications.waset.org/abstracts/search?q=Widad%20Ben%20Bakrim"> Widad Ben Bakrim</a>, <a href="https://publications.waset.org/abstracts/search?q=Chaimae%20Ramdani"> Chaimae Ramdani</a>, <a href="https://publications.waset.org/abstracts/search?q=Rachid%20Boulamtat"> Rachid Boulamtat</a>, <a href="https://publications.waset.org/abstracts/search?q=Mustapha%20El%20Bouhssini"> Mustapha El Bouhssini</a>, <a href="https://publications.waset.org/abstracts/search?q=Jane%20ward"> Jane ward</a>, <a href="https://publications.waset.org/abstracts/search?q=Abdelaziz%20Yasri"> Abdelaziz Yasri</a>, <a href="https://publications.waset.org/abstracts/search?q=Aziz%20Aboulmouhajir"> Aziz Aboulmouhajir</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The wild cochineal Dactylopius opuntiae (Cockerell) (Hemiptera: Dactylopiidae) is the major insect pest of the prickly pear Opuntia ficus-indica (L.) in Morocco, which has causedenormous socio-economic and environmental losses to this crop in recent years. This study aimed to investigate the insecticidal potential of six aqueous (100% water), and methanolic (20/80 (v/v) MeOH/H2O) extracts obtained from aromatic and medicinal plants growing in arid and semi-arid regions of Morocco to control nymphs and adult females of D. opuntiae, under laboratory and greenhouse conditions. Under laboratory conditions, the aqueous extracts of Atriplex halimus at 5% caused significant mortality in nymphs with 71% four days after application and 88%on adult females of D. opuntiae8 days post-treatment. Under greenhouse conditions, the aqueous extract of A. halimus combined with black soap at 10 g/L showed the highest mortality rate of nymphs with 100%, 4 days after application. The adult females' mortality increased significantly to reach 83.75%,14 days after the second application of A. halimus aqueous extract at 5%. Phytochemical analysis of the water extract of A. halimus revealed a high content of saponins (24.09 ± 0.71 mg SSE/g DW) compared to other plant extracts, which was confirmed by LC-MS characterization that showed the presence of 36 triterpenoid saponin compounds (derived from oleic-12-en-28-oic acid), in addition to phytoecdysones, simple carboxylic acids, and flavonoids. These findings showed that using the aqueous extract of A. halimus as a biological pesticide could be incorporated into the management package to control the wild cochineal as a safe alternative to chemical insecticides. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=dactylopius%20opuntiae" title="dactylopius opuntiae">dactylopius opuntiae</a>, <a href="https://publications.waset.org/abstracts/search?q=opuntia%20ficus-indica%20L." title=" opuntia ficus-indica L."> opuntia ficus-indica L.</a>, <a href="https://publications.waset.org/abstracts/search?q=plant%20extracts" title=" plant extracts"> plant extracts</a>, <a href="https://publications.waset.org/abstracts/search?q=toxicity" title=" toxicity"> toxicity</a>, <a href="https://publications.waset.org/abstracts/search?q=atriplex%20halimus" title=" atriplex halimus"> atriplex halimus</a>, <a href="https://publications.waset.org/abstracts/search?q=saponins" title=" saponins"> saponins</a> </p> <a href="https://publications.waset.org/abstracts/150439/chemical-composition-and-insecticidal-properties-of-moroccan-plant-extracts-against-dactylopius-opuntiae-cockerell-under-laboratory-and-greenhouse-conditions" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/150439.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">151</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">18</span> Effects Of Obesity On Periodontal Tissues.</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Benhamouda%20Amira%20Chaimae">Benhamouda Amira Chaimae</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Obesity is a significant health concern that not only affects overall well-being but also increases the risk of developing periodontal disease, a serious gum condition that can lead to tooth loss and other complications. Individuals with obesity are more prone to chronic inflammation, which can exacerbate periodontal issues, making them more vulnerable to its onset and progression. Additionally, managing the health complications associated with obesity, including periodontal disease, leads to increased health care costs for these patients. This underscores the importance of addressing obesity as part of a comprehensive approach to improving both oral and systemic health outcomes. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=obesity" title="obesity">obesity</a>, <a href="https://publications.waset.org/abstracts/search?q=periodontal" title=" periodontal"> periodontal</a>, <a href="https://publications.waset.org/abstracts/search?q=health" title=" health"> health</a>, <a href="https://publications.waset.org/abstracts/search?q=tooth" title=" tooth"> tooth</a> </p> <a href="https://publications.waset.org/abstracts/196239/effects-of-obesity-on-periodontal-tissues" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/196239.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">15</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">17</span> Oesteonecrosis In Patients Trated With Denosumab : a Case Report</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Benhamouda%20Amira%20Chaimae">Benhamouda Amira Chaimae</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Osteonecrosis of the jaw (ONJ) is a rare but serious complication associated with the use of bone-modifying agents, such as Denosumab, commonly prescribed to treat osteoporosis and other bone-related conditions. This case report presents a detailed account of a patient who developed ONJ following treatment with Denosumab. The patient’s clinical presentation, diagnostic process, and management are discussed, highlighting the challenges of diagnosing and treating ONJ in individuals undergoing Denosumab therapy. The report examines the potential pathophysiological mechanisms linking Denosumab treatment to ONJ, including its effects on bone remodeling and the immune response. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=denosumab" title="denosumab">denosumab</a>, <a href="https://publications.waset.org/abstracts/search?q=bone%20loss" title=" bone loss"> bone loss</a>, <a href="https://publications.waset.org/abstracts/search?q=osteonecrosis" title=" osteonecrosis"> osteonecrosis</a>, <a href="https://publications.waset.org/abstracts/search?q=rankl" title=" rankl"> rankl</a> </p> <a href="https://publications.waset.org/abstracts/196240/oesteonecrosis-in-patients-trated-with-denosumab-a-case-report" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/196240.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">18</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">16</span> Blockchain Security in MANETs</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Nada%20Mouchfiq">Nada Mouchfiq</a>, <a href="https://publications.waset.org/abstracts/search?q=Ahmed%20Habbani"> Ahmed Habbani</a>, <a href="https://publications.waset.org/abstracts/search?q=Chaimae%20Benjbara"> Chaimae Benjbara</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The security aspect of the IoT occupies a place of great importance especially after the evolution that has known this field lastly because it must take into account the transformations and the new applications .Blockchain is a new technology dedicated to the data sharing. However, this does not work the same way in the different systems with different operating principles. This article will discuss network security using the Blockchain to facilitate the sending of messages and information, enabling the use of new processes and enabling autonomous coordination of devices. To do this, we will discuss proposed solutions to ensure a high level of security in these networks in the work of other researchers. Finally, our article will propose a method of security more adapted to our needs as a team working in the ad hoc networks, this method is based on the principle of the Blockchain and that we named ”MPR Blockchain”. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ad%20hocs%20networks" title="Ad hocs networks">Ad hocs networks</a>, <a href="https://publications.waset.org/abstracts/search?q=blockchain" title=" blockchain"> blockchain</a>, <a href="https://publications.waset.org/abstracts/search?q=MPR" title=" MPR"> MPR</a>, <a href="https://publications.waset.org/abstracts/search?q=security" title=" security"> security</a> </p> <a href="https://publications.waset.org/abstracts/105050/blockchain-security-in-manets" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/105050.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">188</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">15</span> Design of a Fuzzy Luenberger Observer for Fault Nonlinear System</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Mounir%20Bekaik">Mounir Bekaik</a>, <a href="https://publications.waset.org/abstracts/search?q=Messaoud%20Ramdani"> Messaoud Ramdani</a> </p> <p class="card-text"><strong>Abstract:</strong></p> We present in this work a new technique of stabilization for fault nonlinear systems. The approach we adopt focus on a fuzzy Luenverger observer. The T-S approximation of the nonlinear observer is based on fuzzy C-Means clustering algorithm to find local linear subsystems. The MOESP identification approach was applied to design an empirical model describing the subsystems state variables. The gain of the observer is given by the minimization of the estimation error through Lyapunov-krasovskii functional and LMI approach. We consider a three tank hydraulic system for an illustrative example. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=nonlinear%20system" title="nonlinear system">nonlinear system</a>, <a href="https://publications.waset.org/abstracts/search?q=fuzzy" title=" fuzzy"> fuzzy</a>, <a href="https://publications.waset.org/abstracts/search?q=faults" title=" faults"> faults</a>, <a href="https://publications.waset.org/abstracts/search?q=TS" title=" TS"> TS</a>, <a href="https://publications.waset.org/abstracts/search?q=Lyapunov-Krasovskii" title=" Lyapunov-Krasovskii"> Lyapunov-Krasovskii</a>, <a href="https://publications.waset.org/abstracts/search?q=observer" title=" observer"> observer</a> </p> <a href="https://publications.waset.org/abstracts/47230/design-of-a-fuzzy-luenberger-observer-for-fault-nonlinear-system" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/47230.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">342</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">14</span> Bioinsecticidal Activity and Phytochemical Study of the Crude Extract from the Plant Artemisia judaica</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Fatma%20Acheuk">Fatma Acheuk</a>, <a href="https://publications.waset.org/abstracts/search?q=Idir%20Bitam"> Idir Bitam</a>, <a href="https://publications.waset.org/abstracts/search?q=Leila%20Bendifallah"> Leila Bendifallah</a>, <a href="https://publications.waset.org/abstracts/search?q=Malika%20Ramdani"> Malika Ramdani</a>, <a href="https://publications.waset.org/abstracts/search?q=Fethia%20Barika"> Fethia Barika</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Phytochemical study of the plant Artemisia judaica showed the presence of various groups of natural products: saponins, tannins, coumarins, flavonoids, carbohydrates, and reducer compounds. However, alkaloids are present as traces. The crude ethanol extract of the test plant presented significant insecticidal activity on mosquito larvae in stage I, II and III. The LD50 highlighted the excellent insecticidal effect of the tested extract. Similarly, the LT50 are achieved early with high doses. The results obtained are encouraging and suggest the possibility of using the secondary metabolites of this plant such as bio-insecticide. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Atamisia%20judaica" title="Atamisia judaica">Atamisia judaica</a>, <a href="https://publications.waset.org/abstracts/search?q=crud%20extract" title=" crud extract"> crud extract</a>, <a href="https://publications.waset.org/abstracts/search?q=mosquito" title=" mosquito"> mosquito</a>, <a href="https://publications.waset.org/abstracts/search?q=insecticidal%20activity" title=" insecticidal activity"> insecticidal activity</a> </p> <a href="https://publications.waset.org/abstracts/24116/bioinsecticidal-activity-and-phytochemical-study-of-the-crude-extract-from-the-plant-artemisia-judaica" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/24116.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">525</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">13</span> Sensor Validation Using Bottleneck Neural Network and Variable Reconstruction</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Somia%20Bouzid">Somia Bouzid</a>, <a href="https://publications.waset.org/abstracts/search?q=Messaoud%20Ramdani"> Messaoud Ramdani</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The success of any diagnosis strategy critically depends on the sensors measuring process variables. This paper presents a detection and diagnosis sensor faults method based on a Bottleneck Neural Network (BNN). The BNN approach is used as a statistical process control tool for drinking water distribution (DWD) systems to detect and isolate the sensor faults. Variable reconstruction approach is very useful for sensor fault isolation, this method is validated in simulation on a nonlinear system: actual drinking water distribution system. Several results are presented. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=fault%20detection" title="fault detection">fault detection</a>, <a href="https://publications.waset.org/abstracts/search?q=localization" title=" localization"> localization</a>, <a href="https://publications.waset.org/abstracts/search?q=PCA" title=" PCA"> PCA</a>, <a href="https://publications.waset.org/abstracts/search?q=NLPCA" title=" NLPCA"> NLPCA</a>, <a href="https://publications.waset.org/abstracts/search?q=auto-associative%20neural%20network" title=" auto-associative neural network"> auto-associative neural network</a> </p> <a href="https://publications.waset.org/abstracts/1534/sensor-validation-using-bottleneck-neural-network-and-variable-reconstruction" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/1534.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">394</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">12</span> Phytochemical Study and Bioinsecticidal Effect of the Crude Extract from the Plant Artemisia Judaica</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Fatma%20Acheuk">Fatma Acheuk</a>, <a href="https://publications.waset.org/abstracts/search?q=Idir%20Bitam"> Idir Bitam</a>, <a href="https://publications.waset.org/abstracts/search?q=Leila%20Bendifallah"> Leila Bendifallah</a>, <a href="https://publications.waset.org/abstracts/search?q=Malika%20Ramdani"> Malika Ramdani</a>, <a href="https://publications.waset.org/abstracts/search?q=Fethia%20Barika"> Fethia Barika</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Phytochemical study of the plant Artemisia judaica showed the presence of various groups of natural products: saponins, tannins, coumarins, flavonoids, carbohydrates, and reducer compounds. However alkaloids are present as traces. The crude ethanol extract of the test plant presented significant insecticidal activity on mosquito larvae in stage I, II, and III. The LD50 highlighted the excellent insecticidal effect of the tested extract. Similarly, the LT50 are achieved early with high doses. The results obtained are encouraging and suggest the possibility of using the secondary metabolites of this plant such as bio-insecticide. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Atamisia%20judaica" title="Atamisia judaica">Atamisia judaica</a>, <a href="https://publications.waset.org/abstracts/search?q=crud%20extract" title=" crud extract"> crud extract</a>, <a href="https://publications.waset.org/abstracts/search?q=mosquito" title=" mosquito"> mosquito</a>, <a href="https://publications.waset.org/abstracts/search?q=insecticidal%20activity" title=" insecticidal activity"> insecticidal activity</a> </p> <a href="https://publications.waset.org/abstracts/21689/phytochemical-study-and-bioinsecticidal-effect-of-the-crude-extract-from-the-plant-artemisia-judaica" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/21689.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">601</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">11</span> The High Efficiency of Cationic Azo Dye Removal Using Raw, Purified and Pillared Clay from Algerian Clay</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Amina%20%20Ramdani">Amina Ramdani</a>, <a href="https://publications.waset.org/abstracts/search?q=Abdelkader%20%20Kadeche"> Abdelkader Kadeche</a>, <a href="https://publications.waset.org/abstracts/search?q=Zoubida%20%20Taleb"> Zoubida Taleb</a>, <a href="https://publications.waset.org/abstracts/search?q=Safia%20%20Taleb"> Safia Taleb</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The aim of this present study is to evaluate the adsorption capacity of a dye, Malachite green, on a local Algerian montmorillonite clay mineral (raw, purified and Cr-pillared). Various parameters influencing the dye adsorption process ie contact time, adsorbent dose, initial concentration of dye, pH of the solution and temperature. Cr pillared clay has been obtained with a better surface character than purified and natural clay. An increase in basal spacing from 12.45 Å (Mont-Na) to 22.88 Å (Mont-PLCr), surface area from 67 m2 /g (Mont-Na) to 102 m2 /g (Mont-PLCr). The experimental results show that the dye adsorption kinetic were fast: 5 min for Cr-pillared clay mineral, and 30 min for raw and purified clay mineral (RC and Mont-Na). The removal efficiency on Mont-PLCr (98.64%) is greater than that of Mont-Na (86.20%) and RC (82.09%). The acidity and basicity of the medium considerably affect the adsorption of the dye. It attained its maximum at pH 4.8. The equilibrium and kinetic data were found to ﬁt well the Langmuir model and the pseudo-second-order model. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Dye%20removal" title="Dye removal">Dye removal</a>, <a href="https://publications.waset.org/abstracts/search?q=pillared%20clay" title=" pillared clay"> pillared clay</a>, <a href="https://publications.waset.org/abstracts/search?q=isotherm" title=" isotherm"> isotherm</a>, <a href="https://publications.waset.org/abstracts/search?q=kinetic" title=" kinetic"> kinetic</a> </p> <a href="https://publications.waset.org/abstracts/121475/the-high-efficiency-of-cationic-azo-dye-removal-using-raw-purified-and-pillared-clay-from-algerian-clay" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/121475.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">175</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">10</span> Mobile Platform’s Attitude Determination Based on Smoothed GPS Code Data and Carrier-Phase Measurements</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Mohamed%20Ramdani">Mohamed Ramdani</a>, <a href="https://publications.waset.org/abstracts/search?q=Hassen%20Abdellaoui"> Hassen Abdellaoui</a>, <a href="https://publications.waset.org/abstracts/search?q=Abdenour%20Boudrassen"> Abdenour Boudrassen</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Mobile platform’s attitude estimation approaches mainly based on combined positioning techniques and developed algorithms; which aim to reach a fast and accurate solution. In this work, we describe the design and the implementation of an attitude determination (AD) process, using only measurements from GPS sensors. The major issue is based on smoothed GPS code data using Hatch filter and raw carrier-phase measurements integrated into attitude algorithm based on vectors measurement using least squares (LSQ) estimation method. GPS dataset from a static experiment is used to investigate the effectiveness of the presented approach and consequently to check the accuracy of the attitude estimation algorithm. Attitude results from GPS multi-antenna over short baselines are introduced and analyzed. The 3D accuracy of estimated attitude parameters using smoothed measurements is over 0.27°. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=attitude%20determination" title="attitude determination">attitude determination</a>, <a href="https://publications.waset.org/abstracts/search?q=GPS%20code%20data%20smoothing" title=" GPS code data smoothing"> GPS code data smoothing</a>, <a href="https://publications.waset.org/abstracts/search?q=hatch%20filter" title=" hatch filter"> hatch filter</a>, <a href="https://publications.waset.org/abstracts/search?q=carrier-phase%20measurements" title=" carrier-phase measurements"> carrier-phase measurements</a>, <a href="https://publications.waset.org/abstracts/search?q=least-squares%20attitude%20estimation" title=" least-squares attitude estimation"> least-squares attitude estimation</a> </p> <a href="https://publications.waset.org/abstracts/108141/mobile-platforms-attitude-determination-based-on-smoothed-gps-code-data-and-carrier-phase-measurements" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/108141.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">162</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">9</span> Synthesis, Antibacterial Activities, and Synergistic Effects of Novel Juglone and Naphthazarin Derivatives Against Clinical Methicillin-Resistant Staphylococcus aureus Strains</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Zohra%20Benfodda">Zohra Benfodda</a>, <a href="https://publications.waset.org/abstracts/search?q=Valentin%20Duvauchelle"> Valentin Duvauchelle</a>, <a href="https://publications.waset.org/abstracts/search?q=Chaimae%20Majdi"> Chaimae Majdi</a>, <a href="https://publications.waset.org/abstracts/search?q=David%20B%C3%A9nim%C3%A9lis"> David Bénimélis</a>, <a href="https://publications.waset.org/abstracts/search?q=Catherine%20Dunyach-Remy"> Catherine Dunyach-Remy</a>, <a href="https://publications.waset.org/abstracts/search?q=Patrick%20Meffre"> Patrick Meffre</a> </p> <p class="card-text"><strong>Abstract:</strong></p> New antibiotics are necessary to treat microbial pathogens, especially ESKAPE pathogens that are becoming increasingly resistant to available treatment. Despite the medical need, the number of newly approved drugs continues to decline. The majority of antibiotics under clinical development are natural products or derivatives thereof. 43 juglone/naphthazarin derivatives were synthesized using Minisci-type direct C–H alkylation and evaluated for their antibacterial properties against various clinical and reference Gram-positive MSSA, clinical Gram-positive MRSA. Different compounds of the synthesized series showed promising activity against clinical and reference MSSA (MIC: 1–8 μg/ml) and good efficacy against clinical MRSA (MIC: 2–8 μg/ml) strains. The synergistic effects of active compounds were evaluated with reference antibiotics (vancomycin and cloxacillin), and it was found that the antibiotic combination with those active compounds efficiently enhanced the antimicrobial activity and consequently the MIC values of reference antibiotics were lowered up to 1/16th of the original MIC. These synthesized compounds did not present hemolytic activity on sheep red blood cells. In addition to the in silico prediction of ADME profile parameter which is promising and encouraging for further development. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=juglone" title="juglone">juglone</a>, <a href="https://publications.waset.org/abstracts/search?q=naphthazarin" title=" naphthazarin"> naphthazarin</a>, <a href="https://publications.waset.org/abstracts/search?q=antibacterial" title=" antibacterial"> antibacterial</a>, <a href="https://publications.waset.org/abstracts/search?q=clinical%20MRSA" title=" clinical MRSA"> clinical MRSA</a>, <a href="https://publications.waset.org/abstracts/search?q=synergistic%20studies" title=" synergistic studies"> synergistic studies</a>, <a href="https://publications.waset.org/abstracts/search?q=MIC%20determination" title=" MIC determination"> MIC determination</a> </p> <a href="https://publications.waset.org/abstracts/149176/synthesis-antibacterial-activities-and-synergistic-effects-of-novel-juglone-and-naphthazarin-derivatives-against-clinical-methicillin-resistant-staphylococcus-aureus-strains" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/149176.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">131</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> Hybrid Wavelet-Adaptive Neuro-Fuzzy Inference System Model for a Greenhouse Energy Demand Prediction</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Azzedine%20Hamza">Azzedine Hamza</a>, <a href="https://publications.waset.org/abstracts/search?q=Chouaib%20Chakour"> Chouaib Chakour</a>, <a href="https://publications.waset.org/abstracts/search?q=Messaoud%20Ramdani"> Messaoud Ramdani</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Energy demand prediction plays a crucial role in achieving next-generation power systems for agricultural greenhouses. As a result, high prediction quality is required for efficient smart grid management and therefore low-cost energy consumption. The aim of this paper is to investigate the effectiveness of a hybrid data-driven model in day-ahead energy demand prediction. The proposed model consists of Discrete Wavelet Transform (DWT), and Adaptive Neuro-Fuzzy Inference System (ANFIS). The DWT is employed to decompose the original signal in a set of subseries and then an ANFIS is used to generate the forecast for each subseries. The proposed hybrid method (DWT-ANFIS) was evaluated using a greenhouse energy demand data for a week and compared with ANFIS. The performances of the different models were evaluated by comparing the corresponding values of Mean Absolute Percentage Error (MAPE). It was demonstrated that discret wavelet transform can improve agricultural greenhouse energy demand modeling. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=wavelet%20transform" title="wavelet transform">wavelet transform</a>, <a href="https://publications.waset.org/abstracts/search?q=ANFIS" title=" ANFIS"> ANFIS</a>, <a href="https://publications.waset.org/abstracts/search?q=energy%20consumption%20prediction" title=" energy consumption prediction"> energy consumption prediction</a>, <a href="https://publications.waset.org/abstracts/search?q=greenhouse" title=" greenhouse"> greenhouse</a> </p> <a href="https://publications.waset.org/abstracts/163632/hybrid-wavelet-adaptive-neuro-fuzzy-inference-system-model-for-a-greenhouse-energy-demand-prediction" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/163632.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">7</span> Physico-Chemical and Biological Characterization of Urban Municipal Landfill Leachate and Treatment by Ozone Process</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Nadia%20Ramdani">Nadia Ramdani</a>, <a href="https://publications.waset.org/abstracts/search?q=Abelkarim%20Kheddaoui"> Abelkarim Kheddaoui</a>, <a href="https://publications.waset.org/abstracts/search?q=Said%20Nemmich"> Said Nemmich</a>, <a href="https://publications.waset.org/abstracts/search?q=Amar%20Tilmatine"> Amar Tilmatine</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Thewaste production nationwide is increasing every year, on account of therapid urbanization and growing populations, also consumption modes. Algerian political authorities have chosen Technical Landfill Centres (TLC) as a competitive and safe technique of waste management.However, storing these wastes in a bad way poses several environmental challenges, especially in the Department of Saïda, the latter have significant groundwaters. The major problem registered on this Landfill is the leachate resulting from the degradation of buried wastes which were disposed off the outside of the leachate basinand present a source of pollution for the local groundwaters by heavy metals and pathogenic germs.The present paper investigates the leachate treatment ozone process produced by Dielectric Barrier Discharge (DBD) under high potential. The experimental results obtained allowed us to show the efficiency of the treatment process by ozone based on the micro pollutant analysis (DCO, DBO5 , COT, heavy metals) and microbial analysis, after ozonation treatment.The results show that 80% of micro pollutants are eliminated and 100% destruction of all bacteria which reveals the high efficiency of the process. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=landfill%20leachate" title="landfill leachate">landfill leachate</a>, <a href="https://publications.waset.org/abstracts/search?q=treatment" title=" treatment"> treatment</a>, <a href="https://publications.waset.org/abstracts/search?q=DBD%20generator" title=" DBD generator"> DBD generator</a>, <a href="https://publications.waset.org/abstracts/search?q=ozone" title=" ozone"> ozone</a>, <a href="https://publications.waset.org/abstracts/search?q=polluants" title=" polluants"> polluants</a>, <a href="https://publications.waset.org/abstracts/search?q=bacteria" title=" bacteria"> bacteria</a> </p> <a href="https://publications.waset.org/abstracts/198606/physico-chemical-and-biological-characterization-of-urban-municipal-landfill-leachate-and-treatment-by-ozone-process" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/198606.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">4</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> Physico-chemical and Biological Characterization of Urban Municipal Landfill Leachate and Treatment by Ozone Process</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ramdani%20Nadia">Ramdani Nadia</a>, <a href="https://publications.waset.org/abstracts/search?q=Kheddaoui%20Abdelkrim"> Kheddaoui Abdelkrim</a>, <a href="https://publications.waset.org/abstracts/search?q=Nemmich%20Said"> Nemmich Said</a>, <a href="https://publications.waset.org/abstracts/search?q=Tilmatine%20Amar"> Tilmatine Amar</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The waste production nationwide is increasing every year, on account of therapid urbanization and growing populations, also consumption modes. Algerian political authorities have chosen Technical Landfill Centres (TLC) as a competitive and safe technique of waste management. However, storing these wastes in a bad way poses several environmental challenges, especially in the Department of Saïda, the latter have significant groundwaters. The major problem registered on this Landfill is the leachate resulting from the degradation of buried wastes which were disposed off the outside of the leachate basin and present a source of pollution for the local groundwaters by heavy metals and pathogenic germs. The present paper investigates the leachate treatment ozone process produced by Dielectric Barrier Discharge (DBD) under high potential. The experimental results obtained allowed us to show the efficiency of the treatment process by ozone based on the micro pollutant analysis (DCO, DBO5 , COT, heavy metals) and microbial analysis, after ozonation treatment. The results show that 80% of micro pollutants are eliminated and 100% destruction of all bacteria which reveals the high efficiency of the process. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=landfill" title="landfill">landfill</a>, <a href="https://publications.waset.org/abstracts/search?q=leachate" title=" leachate"> leachate</a>, <a href="https://publications.waset.org/abstracts/search?q=treatment" title=" treatment"> treatment</a>, <a href="https://publications.waset.org/abstracts/search?q=ozone" title=" ozone"> ozone</a>, <a href="https://publications.waset.org/abstracts/search?q=polluants" title=" polluants"> polluants</a>, <a href="https://publications.waset.org/abstracts/search?q=bacteria" title=" bacteria"> bacteria</a>, <a href="https://publications.waset.org/abstracts/search?q=micropolluant" title=" micropolluant"> micropolluant</a> </p> <a href="https://publications.waset.org/abstracts/192436/physico-chemical-and-biological-characterization-of-urban-municipal-landfill-leachate-and-treatment-by-ozone-process" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/192436.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">29</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> Validity and Reliability of Lifestyle Measurement of the LSAS among Recurrent Stroke Patients in Selected Hospital, Central Java, Indonesia</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Meida%20Laely%20Ramdani">Meida Laely Ramdani</a>, <a href="https://publications.waset.org/abstracts/search?q=Earmporn%20Thongkrajai"> Earmporn Thongkrajai</a>, <a href="https://publications.waset.org/abstracts/search?q=Dedy%20Purwito"> Dedy Purwito</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Lifestyle is one of the most important factors affecting health. Measurement of lifestyle behaviors is necessary for the identification of causal associations between unhealthy lifestyle and health outcomes. There was many instruments have been measured for lifestyle, but not specific for stroke recurrence. This study aimed to develop a new questionnaire of Lifestyle Adjustment Scale (LSAS) among recurrent stroke patients in Indonesia and to measure the reliability and validity of LSAS. The instrument consist of 33 items was developed from the responses of 30 recurrent stroke patients with the maximum age 60 years. Data was collected during October to November 2015. The properties of the instrument were evaluated by validity assessment and reliability measures. The content validity was judged adequate by a panel of five experts, with the result of I-CVI was 0.97. The Cronbach’s alpha analysis was carried out to measure the reliability of LSAS. The result showed that Cronbach’s alpha coefficient was 0.819. LSAS were classified under the domains of dietary habit, smoking habit, physical activity, and stress management. The results of Cronbach’s alpha coefficient for each subscale were 0.60, 0.39, 0.67, 0.65 and 0.76 respectively. LSAS instrument was valid and reliable therefore can be used as research tool among recurrent stroke patients. The development of this questionnaire has been adapted to the socio-cultural context in Indonesia. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=LSAS" title="LSAS">LSAS</a>, <a href="https://publications.waset.org/abstracts/search?q=recurrent%20stroke%20patients" title=" recurrent stroke patients"> recurrent stroke patients</a>, <a href="https://publications.waset.org/abstracts/search?q=lifestyle" title=" lifestyle"> lifestyle</a>, <a href="https://publications.waset.org/abstracts/search?q=Indonesia" title=" Indonesia"> Indonesia</a> </p> <a href="https://publications.waset.org/abstracts/47072/validity-and-reliability-of-lifestyle-measurement-of-the-lsas-among-recurrent-stroke-patients-in-selected-hospital-central-java-indonesia" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/47072.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">254</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> Effect of the Firing Cycle on the Microstructure and Mechanical Properties of High Steel Barrel Fabricated by Forging Process</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=El%20Oualid%20Mokhnache">El Oualid Mokhnache</a>, <a href="https://publications.waset.org/abstracts/search?q=Noureddine%20Ramdani"> Noureddine Ramdani</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The choice of gun barrel materials is crucial to ensure the maximum high rate of fire. The high rate of fire causes wear-out damage and shuts off mechanical properties (hardness, strength, wear resistance, etc.) and ballistic properties (bullet speed, dispersion and precision, longevity of barrel, etc). To overcome these kinds of problems, a deep understanding of the effect of the firing cycle on the mechanical and ballistic properties of the barrel is regarded as crucial to improving its characteristics. In the present work, a real experimental test of firing by using a high steel barrel with 7.62x39 ammunition was carried. Microstructural observations by using SEM were investigated. Hardness evolution through the barrel of both barrels labeled as reference barrels and as fired barrels were compared and discussed. Ballistic properties during the firing test, including speed of projectile and precision dispersion, are revealed and discussed as well. The aim of the present communication is about to discuss the relationship between pressure distribution versus mechanical properties through the wall barrel. Ballistic properties, including speed of the projectile, dispersion, and precision results during the shooting process, were investigated. Microstructure observations of the as-rifled barrel in comparison with the as-reference barrel were performed as well. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=barrel" title="barrel">barrel</a>, <a href="https://publications.waset.org/abstracts/search?q=ballistic" title=" ballistic"> ballistic</a>, <a href="https://publications.waset.org/abstracts/search?q=pressure" title=" pressure"> pressure</a>, <a href="https://publications.waset.org/abstracts/search?q=microstructure%20evolution" title=" microstructure evolution"> microstructure evolution</a>, <a href="https://publications.waset.org/abstracts/search?q=hardness" title=" hardness"> hardness</a> </p> <a href="https://publications.waset.org/abstracts/179066/effect-of-the-firing-cycle-on-the-microstructure-and-mechanical-properties-of-high-steel-barrel-fabricated-by-forging-process" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/179066.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">84</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 Influence of Incorporating in the Concrete of Recycled Waste from Shredding Used Tires and Crushed Glass on Their Characteristics and Behavior</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Samiha%20Ramdani">Samiha Ramdani</a>, <a href="https://publications.waset.org/abstracts/search?q=Abdelhamid%20Geuttala"> Abdelhamid Geuttala</a> </p> <p class="card-text"><strong>Abstract:</strong></p> There is no doubt that the batteries increasingly used tires create environmental concerns. Algeria generates large amounts of by industrial and household waste, such as used tires and colored glass bottles and dishes, whose valuation in cementitious materials could be an interesting ecological and economical alternative for broadening eliminating cumbersome landfills. This work is a contribution to the promotion of local materials with the use of waste tires and glass bottle in the development of a new cementitious composite having the acceptable compressive strength and a capacity of improved strains. For this purpose, rubber crumb (GC) from shredding used tires were used as partial replacement of quarry sand with 10%, 20%, 40, 60%. In addition, some mixtures also contain glass powder at15% cement replacement by volume. The compressive strength, tensile strength, deformability, the water permeability and penetration Inions chlorides are studied. As results; an acceptable compressive strength was obtained with the substitution rate of 10% and 20% by volume, the deformability of the composite increases with increased replacement rate. The addition of finely ground glass as a partial replacement of cement concrete increases the resistance to penetration of Inions chloride and reduce the water permeability thereof; then increases their durability. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=crumb%20rubber" title="crumb rubber">crumb rubber</a>, <a href="https://publications.waset.org/abstracts/search?q=deformability" title=" deformability"> deformability</a>, <a href="https://publications.waset.org/abstracts/search?q=compressive%20strength" title=" compressive strength"> compressive strength</a>, <a href="https://publications.waset.org/abstracts/search?q=finely%20ground%20glass" title=" finely ground glass"> finely ground glass</a>, <a href="https://publications.waset.org/abstracts/search?q=durability" title=" durability"> durability</a>, <a href="https://publications.waset.org/abstracts/search?q=behavior%20law" title=" behavior law"> behavior law</a> </p> <a href="https://publications.waset.org/abstracts/34272/the-influence-of-incorporating-in-the-concrete-of-recycled-waste-from-shredding-used-tires-and-crushed-glass-on-their-characteristics-and-behavior" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/34272.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">326</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> Development of High-Performance Conductive Polybenzoxazine/Graphite-Copper Nanoomposite for Electromagnetic Interference Shielding Applications</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Noureddine%20Ramdani">Noureddine Ramdani</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In recent years, extensive attention has been given to the study of conductive nanocomposites due to their unique properties, which are dependent on their size and shape. The potential applications of these materials include electromagnetic interference shielding, energy storage, photovoltaics, and others. These outstanding properties have led to increased interest and research in this field. In this work, a conductive poly benzoxazine nanocomposite, PBZ/Gr-Cu, was synthesized through a compression molding technique to achieve a high-performance material suitable for electromagnetic interference (EMI) shielding applications. The microstructure of the nanocomposites was analyzed using scanning electron microscopy (SEM) and Fourier transform infrared spectroscopy (FTIR). The thermal stability, electrical conductivity, and EMI shielding properties of the nanocomposites were evaluated using thermogravimetric analysis, a four-point probe, and a VNA analyzer, respectively. The TGA results revealed that the thermal stability and electrical conductivity of the nanocomposites were significantly enhanced by the incorporation of Gr/Cu nanoparticles. The nanocomposites exhibited a low percolation threshold of about 3.5 wt.% and an increase in carrier concentration and mobility of the carriers with increasing hybrid nanofiller content, causing the composites to behave as n-type semiconductors. These nanocomposites also displayed a high dielectric constant and a high dissipation factor in the frequency range of 8-12 GHz, resulting in higher EMI shielding effectiveness (SE) of 25-44 dB. These characteristics make them promising candidates for lightweight EMI shielding materials in aerospace and radar evasion applications. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=polybenzoxazine%20matrix" title="polybenzoxazine matrix">polybenzoxazine matrix</a>, <a href="https://publications.waset.org/abstracts/search?q=conductive%20nanocomposites" title=" conductive nanocomposites"> conductive nanocomposites</a>, <a href="https://publications.waset.org/abstracts/search?q=electrical%20conductivity" title=" electrical conductivity"> electrical conductivity</a>, <a href="https://publications.waset.org/abstracts/search?q=EMI%20shielding" title=" EMI shielding"> EMI shielding</a> </p> <a href="https://publications.waset.org/abstracts/164912/development-of-high-performance-conductive-polybenzoxazinegraphite-copper-nanoomposite-for-electromagnetic-interference-shielding-applications" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/164912.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">95</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> Experimental Study of the Antibacterial Activity and Modeling of Non-isothermal Crystallization Kinetics of Sintered Seashell Reinforced Poly(Lactic Acid) And Poly(Butylene Succinate) Biocomposites Planned for 3D Printing</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Mohammed%20S.%20Razali">Mohammed S. Razali</a>, <a href="https://publications.waset.org/abstracts/search?q=Kamel%20Khimeche"> Kamel Khimeche</a>, <a href="https://publications.waset.org/abstracts/search?q=Dahah%20Hichem"> Dahah Hichem</a>, <a href="https://publications.waset.org/abstracts/search?q=Ammar%20Boudjellal"> Ammar Boudjellal</a>, <a href="https://publications.waset.org/abstracts/search?q=Djamel%20E.%20Kaderi"> Djamel E. Kaderi</a>, <a href="https://publications.waset.org/abstracts/search?q=Nourddine%20Ramdani"> Nourddine Ramdani</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The use of additive manufacturing technologies has revolutionized various aspects of our daily lives. In particular, 3D printing has greatly advanced biomedical applications. While fused filament fabrication (FFF) technologies have made it easy to produce or prototype various medical devices, it is crucial to minimize the risk of contamination. New materials with antibacterial properties, such as those containing compounded silver nanoparticles, have emerged on the market. In a previous study, we prepared a newly sintered seashell filler (SSh) from bio-based seashells found along the Mediterranean coast using a suitable heat treatment process. We then prepared a series of polylactic acid (PLA) and polybutylene succinate (PBS) biocomposites filled with these SSh particles using a melt mixing technique with a twin-screw extruder to use them as feedstock filaments for 3D printing. The study consisted of two parts: evaluating the antibacterial activity of newly prepared biocomposites made of PLA and PBS reinforced with a sintered seashell in the first part and experimental and modeling analysis of the non-isothermal crystallization kinetics of these biocomposites in the second part. In the first part, the bactericidal activity of the biocomposites against three different bacteria, including Gram-negative bacteria such as (E. coli and Pseudomonas aeruginosa), as well as Gram-positive bacteria such as (Staphylococcus aureus), was examined. The PLA-based biocomposite containing 20 wt.% of SSh particles exhibited an inhibition zone with radial diameters of 8mm and 6mm against E. coli and Pseudo. Au, respectively, while no bacterial activity was observed against Staphylococcus aureus. In the second part, the focus was on investigating the effect of the sintered seashell filler particles on the non-isothermal crystallization kinetics of PLA and PBS 3D-printing composite materials. The objective was to understand the impact of the filler particles on the crystallization mechanism of both PLA and PBS during the cooling process of a melt-extruded filament in (FFF) to manage the dimensional accuracy and mechanical properties of the final printed part. We conducted a non-isothermal melt crystallization kinetic study of a series of PLA-SS and PBS-SS composites using differential scanning calorimetry at various cooling rates. We analyzed the obtained kinetic data using different crystallization kinetic models such as modified Avrami, Ozawa, and Mo's methods. Dynamic mode describes the relative crystallinity as a function of temperature; it found that time half crystallinity (t1/2) of neat PLA decreased from 17 min to 7.3 min for PLA+5 SSh and the (t1/2) of virgin PBS was reduced from 3.5 min to 2.8 min for the composite containing 5wt.% of SSh. We found that the coated SS particles with stearic acid acted as nucleating agents and had a nucleation activity, as observed through polarized optical microscopy. Moreover, we evaluated the effective energy barrier of the non-isothermal crystallization process using the Iso conversional methods of Flynn-Wall-Ozawa (F-W-O) and Kissinger-Akahira-Sunose (K-A-S). The study provides significant insights into the crystallization behavior of PLA and PBS biocomposites. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=avrami%20model" title="avrami model">avrami model</a>, <a href="https://publications.waset.org/abstracts/search?q=bio-based%20reinforcement" title=" bio-based reinforcement"> bio-based reinforcement</a>, <a href="https://publications.waset.org/abstracts/search?q=dsc" title=" dsc"> dsc</a>, <a href="https://publications.waset.org/abstracts/search?q=gram-negative%20bacteria" title=" gram-negative bacteria"> gram-negative bacteria</a>, <a href="https://publications.waset.org/abstracts/search?q=gram-positive%20bacteria" title=" gram-positive bacteria"> gram-positive bacteria</a>, <a href="https://publications.waset.org/abstracts/search?q=isoconversional%20methods" title=" isoconversional methods"> isoconversional methods</a>, <a href="https://publications.waset.org/abstracts/search?q=non-isothermal%20crystallization%20kinetics" title=" non-isothermal crystallization kinetics"> non-isothermal crystallization kinetics</a>, <a href="https://publications.waset.org/abstracts/search?q=poly%28butylene%20succinate%29" title=" poly(butylene succinate)"> poly(butylene succinate)</a>, <a href="https://publications.waset.org/abstracts/search?q=poly%28lactic%20acid%29" title=" poly(lactic acid)"> poly(lactic acid)</a>, <a href="https://publications.waset.org/abstracts/search?q=antbactirial%20activity" title=" antbactirial activity"> antbactirial activity</a> </p> <a href="https://publications.waset.org/abstracts/165124/experimental-study-of-the-antibacterial-activity-and-modeling-of-non-isothermal-crystallization-kinetics-of-sintered-seashell-reinforced-polylactic-acid-and-polybutylene-succinate-biocomposites-planned-for-3d-printing" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/165124.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">87</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 foundational anniversary</a></li> </ul> </div> <div class="col-md-2"> <ul class="list-unstyled"> Account <li><a href="https://waset.org/profile">My Account</a></li> </ul> </div> <div class="col-md-2"> <ul class="list-unstyled"> Explore 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