Search results for: Aabiah Nayeem

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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> 4</div> </div> </div> </div> <h1 class="mt-3 mb-3 text-center" style="font-size:1.6rem;">Search results for: Aabiah Nayeem</h1> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">4</span> Comparison of Security Challenges and Issues of Mobile Computing and Internet of Things</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Aabiah%20Nayeem">Aabiah Nayeem</a>, <a href="https://publications.waset.org/abstracts/search?q=Fariha%20Shafiq"> Fariha Shafiq</a>, <a href="https://publications.waset.org/abstracts/search?q=Mustabshra%20Aftab"> Mustabshra Aftab</a>, <a href="https://publications.waset.org/abstracts/search?q=Rabia%20Saman%20Pirzada"> Rabia Saman Pirzada</a>, <a href="https://publications.waset.org/abstracts/search?q=Samia%20Ghazala"> Samia Ghazala</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this modern era of technology, the concept of Internet of Things is very popular in every domain. It is a widely distributed system of things in which the data collected from sensory devices is transmitted, analyzed locally/collectively then broadcasted to network where action can be taken remotely via mobile/web apps. Today’s mobile computing is also gaining importance as the services are provided during mobility. Through mobile computing, data are transmitted via computer without physically connected to a fixed point. The challenge is to provide services with high speed and security. Also, the data gathered from the mobiles must be processed in a secured way. Mobile computing is strongly influenced by internet of things. In this paper, we have discussed security issues and challenges of internet of things and mobile computing and we have compared both of them on the basis of similarities and dissimilarities. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=embedded%20computing" title="embedded computing">embedded computing</a>, <a href="https://publications.waset.org/abstracts/search?q=internet%20of%20things" title=" internet of things"> internet of things</a>, <a href="https://publications.waset.org/abstracts/search?q=mobile%20computing" title=" mobile computing"> mobile computing</a>, <a href="https://publications.waset.org/abstracts/search?q=wireless%20technologies" title=" wireless technologies"> wireless technologies</a> </p> <a href="https://publications.waset.org/abstracts/82889/comparison-of-security-challenges-and-issues-of-mobile-computing-and-internet-of-things" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/82889.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">325</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> A Comparative Analysis of Hyper-Parameters Using Neural Networks for E-Mail Spam Detection</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Syed%20Mahbubuz%20Zaman">Syed Mahbubuz Zaman</a>, <a href="https://publications.waset.org/abstracts/search?q=A.%20B.%20M.%20Abrar%20Haque"> A. B. M. Abrar Haque</a>, <a href="https://publications.waset.org/abstracts/search?q=Mehedi%20Hassan%20Nayeem"> Mehedi Hassan Nayeem</a>, <a href="https://publications.waset.org/abstracts/search?q=Misbah%20Uddin%20Sagor"> Misbah Uddin Sagor</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Everyday e-mails are being used by millions of people as an effective form of communication over the Internet. Although e-mails allow high-speed communication, there is a constant threat known as spam. Spam e-mail is often called junk e-mails which are unsolicited and sent in bulk. These unsolicited emails cause security concerns among internet users because they are being exposed to inappropriate content. There is no guaranteed way to stop spammers who use static filters as they are bypassed very easily. In this paper, a smart system is proposed that will be using neural networks to approach spam in a different way, and meanwhile, this will also detect the most relevant features that will help to design the spam filter. Also, a comparison of different parameters for different neural network models has been shown to determine which model works best within suitable parameters. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=long%20short-term%20memory" title="long short-term memory">long short-term memory</a>, <a href="https://publications.waset.org/abstracts/search?q=bidirectional%20long%20short-term%20memory" title=" bidirectional long short-term memory"> bidirectional long short-term memory</a>, <a href="https://publications.waset.org/abstracts/search?q=gated%20recurrent%20unit" title=" gated recurrent unit"> gated recurrent unit</a>, <a href="https://publications.waset.org/abstracts/search?q=natural%20language%20processing" title=" natural language processing"> natural language processing</a>, <a href="https://publications.waset.org/abstracts/search?q=natural%20language%20processing" title=" natural language processing"> natural language processing</a> </p> <a href="https://publications.waset.org/abstracts/139957/a-comparative-analysis-of-hyper-parameters-using-neural-networks-for-e-mail-spam-detection" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/139957.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">211</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> Structural Evidence of the Conversion of Nitric Oxide (NO) to Nitrite Ion (NO2‾) by Lactoperoxidase (LPO): Structure of the Complex of LPO with NO2‾ at 1.89å Resolution</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=V.%20Viswanathan">V. Viswanathan</a>, <a href="https://publications.waset.org/abstracts/search?q=Md.%20Irshad%20Ahmad"> Md. Irshad Ahmad</a>, <a href="https://publications.waset.org/abstracts/search?q=Prashant%20K.%20Singh"> Prashant K. Singh</a>, <a href="https://publications.waset.org/abstracts/search?q=Nayeem%20Ahmad"> Nayeem Ahmad</a>, <a href="https://publications.waset.org/abstracts/search?q=Pradeep%20Sharma"> Pradeep Sharma</a>, <a href="https://publications.waset.org/abstracts/search?q=Sujata%20Sharma"> Sujata Sharma</a>, <a href="https://publications.waset.org/abstracts/search?q=Tej%20P%20Singh"> Tej P Singh</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Lactoperoxidase (LPO) is a heme containing mammalian enzyme which uses hydrogen peroxide (H2O2) to catalyze the conversion of substrates into oxidized products. LPO is found in body fluids and tissues such as milk, saliva, tears, mucosa and other body secretions. The previous structural studies have shown that LPO converts substrates, thiocyanate (SCN‾) and iodide (I‾) ions into oxidized products, hypothiocyanite (OSCN‾) and hypoiodite (IO‾) ions, respectively. We report here a new structure of the complex of LPO with an oxidized product, nitrite (NO2‾). This product was generated from NO using the two step reaction of LPO by adding hydrogen peroxide (H2O2) in the solution of LPO in 0.1M phosphate buffer at pH 6.8 as the first step. In the second step, NO gas was added to the above mixture. This was crystallized using 20% (w/v) PEG-3350 and 0.2M ammonium iodide at pH 6.8. The structure determination showed the presence of NO2‾ ion in the distal heme cavity of the substrate binding site of LPO. The structure also showed that the propionate group, which is linked to pyrrole ring D of the heme moiety, was disordered. Similarly, the side chain of Asp108, which is covalently linked to heme moiety, was also split into two components. As a result of these changes, the conformation of the side chain of Arg255 was altered, allowing it to form new interactions with the disordered carboxylic group of propionate moiety. These structural changes are indicative of an intermediate state in the catalytic reaction pathway of LPO. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=lactoperoxidase" title="lactoperoxidase">lactoperoxidase</a>, <a href="https://publications.waset.org/abstracts/search?q=structure" title=" structure"> structure</a>, <a href="https://publications.waset.org/abstracts/search?q=nitric%20oxide" title=" nitric oxide"> nitric oxide</a>, <a href="https://publications.waset.org/abstracts/search?q=nitrite%20ion" title=" nitrite ion"> nitrite ion</a>, <a href="https://publications.waset.org/abstracts/search?q=intermediate" title=" intermediate"> intermediate</a>, <a href="https://publications.waset.org/abstracts/search?q=complex" title=" complex"> complex</a> </p> <a href="https://publications.waset.org/abstracts/172967/structural-evidence-of-the-conversion-of-nitric-oxide-no-to-nitrite-ion-no2-by-lactoperoxidase-lpo-structure-of-the-complex-of-lpo-with-no2-at-189a-resolution" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/172967.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">120</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> Performance of Reinforced Concrete Beams under Different Fire Durations</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Arifuzzaman%20Nayeem">Arifuzzaman Nayeem</a>, <a href="https://publications.waset.org/abstracts/search?q=Tafannum%20Torsha"> Tafannum Torsha</a>, <a href="https://publications.waset.org/abstracts/search?q=Tanvir%20Manzur"> Tanvir Manzur</a>, <a href="https://publications.waset.org/abstracts/search?q=Shaurav%20Alam"> Shaurav Alam</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Performance evaluation of reinforced concrete (RC) beams subjected to accidental fire is significant for post-fire capacity measurement. Mechanical properties of any RC beam degrade due to heating since the strength and modulus of concrete and reinforcement suffer considerable reduction under elevated temperatures. Moreover, fire-induced thermal dilation and shrinkage cause internal stresses within the concrete and eventually result in cracking, spalling, and loss of stiffness, which ultimately leads to lower service life. However, conducting full-scale comprehensive experimental investigation for RC beams exposed to fire is difficult and cost-intensive, where the finite element (FE) based numerical study can provide an economical alternative for evaluating the post-fire capacity of RC beams. In this study, an attempt has been made to study the fire behavior of RC beams using FE software package ABAQUS under different durations of fire. The damaged plasticity model of concrete in ABAQUS was used to simulate behavior RC beams. The effect of temperature on strength and modulus of concrete and steel was simulated following relevant Eurocodes. Initially, the result of FE models was validated using several experimental results from available scholarly articles. It was found that the response of the developed FE models matched quite well with the experimental outcome for beams without heat. The FE analysis of beams subjected to fire showed some deviation from the experimental results, particularly in terms of stiffness degradation. However, the ultimate strength and deflection of FE models were similar to that of experimental values. The developed FE models, thus, exhibited the good potential to predict the fire behavior of RC beams. Once validated, FE models were then used to analyze several RC beams having different strengths (ranged between 20 MPa and 50 MPa) exposed to the standard fire curve (ASTM E119) for different durations. The post-fire performance of RC beams was investigated in terms of load-deflection behavior, flexural strength, and deflection characteristics. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=fire%20durations" title="fire durations">fire durations</a>, <a href="https://publications.waset.org/abstracts/search?q=flexural%20strength" title=" flexural strength"> flexural strength</a>, <a href="https://publications.waset.org/abstracts/search?q=post%20fire%20capacity" title=" post fire capacity"> post fire capacity</a>, <a href="https://publications.waset.org/abstracts/search?q=reinforced%20concrete%20beam" title=" reinforced concrete beam"> reinforced concrete beam</a>, <a href="https://publications.waset.org/abstracts/search?q=standard%20fire" title=" standard fire"> standard fire</a> </p> <a href="https://publications.waset.org/abstracts/129418/performance-of-reinforced-concrete-beams-under-different-fire-durations" class="btn 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Search results for: Aabiah Nayeem