Pub Date : 2018-10-01DOI: 10.1109/ICOASE.2018.8548934
B. A. Mahmood, Majeed A. Yousif
In this paper, a modern and approach method called residual power series technique has been applied to find numerical solution for an important equation in optical communication systems and optical fibers called Fornberg-Whitham equation. In addition to that, the technique has been used in regard of the effectiveness of time. The present results have been used to compare it with the exact solution and have been shown graphically to demonstrate the effectiveness and suitability of RPS method. Furthermore, the steadiness and the action of time of the Fornberg-Whitham equation and the modified Fornberg-Whitham equation have been discussed and concluded that the RPSM method is an influential and beneficial one to solve strong nonlinear partial differential equations.
{"title":"A Numerical Approach of Fornberg-Whitham Equation Using Residual Power Series Method","authors":"B. A. Mahmood, Majeed A. Yousif","doi":"10.1109/ICOASE.2018.8548934","DOIUrl":"https://doi.org/10.1109/ICOASE.2018.8548934","url":null,"abstract":"In this paper, a modern and approach method called residual power series technique has been applied to find numerical solution for an important equation in optical communication systems and optical fibers called Fornberg-Whitham equation. In addition to that, the technique has been used in regard of the effectiveness of time. The present results have been used to compare it with the exact solution and have been shown graphically to demonstrate the effectiveness and suitability of RPS method. Furthermore, the steadiness and the action of time of the Fornberg-Whitham equation and the modified Fornberg-Whitham equation have been discussed and concluded that the RPSM method is an influential and beneficial one to solve strong nonlinear partial differential equations.","PeriodicalId":144020,"journal":{"name":"2018 International Conference on Advanced Science and Engineering (ICOASE)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122805810","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-10-01DOI: 10.1109/icoase.2018.8548942
{"title":"ICOASE 2018 TOC","authors":"","doi":"10.1109/icoase.2018.8548942","DOIUrl":"https://doi.org/10.1109/icoase.2018.8548942","url":null,"abstract":"","PeriodicalId":144020,"journal":{"name":"2018 International Conference on Advanced Science and Engineering (ICOASE)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133388106","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-10-01DOI: 10.1109/ICOASE.2018.8548917
H. M. Salim, H. Abdallah, P. Ramasami
The Paternὸ-Büchi reaction of benzene with benzaldehyde and furan with furfural were studied theoretically. The mechanism was investigated using Density Functional Theory (DFT). It was found that the final product of the benzene reaction is oxetane 3, while in the case of furan the oxetane 6 is unstable and goes through oxetane ring opening. The target of this article was to study the reaction mechanism and calculate the thermodynamic parameters of the reactions. The oxetane 3 formed was found to be stable with reaction energy of -120 kcal/mol. However, the oxetane 6 was found to be less stable with reaction energy 21 kcal/mol which tends to produce more stable product 7 through the oxetane ring opening. In addition, the molecular orbitals were calculated and analyzed for all the intermediates, oxetanes and final products.
对苯与苯甲醛、呋喃与糠醛的Patern - b - chi反应进行了理论研究。利用密度泛函理论(DFT)对其机理进行了研究。结果表明，苯反应的最终产物为氧乙烷3，而呋喃反应的氧乙烷6不稳定，通过氧乙烷开环。本文的目的是研究反应机理和计算反应的热力学参数。生成的氧乙烷3稳定，反应能为-120 kcal/mol。结果表明，氧己烷6的稳定性较差，反应能为21 kcal/mol，通过氧己烷开环反应生成更稳定的产物7。此外，对所有中间体、氧烷和最终产物的分子轨道进行了计算和分析。
{"title":"Mechanism and Thermodynamic Parameters of Paternὸ-Büchi Reaction of Benzene and Furan: DFT Study","authors":"H. M. Salim, H. Abdallah, P. Ramasami","doi":"10.1109/ICOASE.2018.8548917","DOIUrl":"https://doi.org/10.1109/ICOASE.2018.8548917","url":null,"abstract":"The Paternὸ-Büchi reaction of benzene with benzaldehyde and furan with furfural were studied theoretically. The mechanism was investigated using Density Functional Theory (DFT). It was found that the final product of the benzene reaction is oxetane 3, while in the case of furan the oxetane 6 is unstable and goes through oxetane ring opening. The target of this article was to study the reaction mechanism and calculate the thermodynamic parameters of the reactions. The oxetane 3 formed was found to be stable with reaction energy of -120 kcal/mol. However, the oxetane 6 was found to be less stable with reaction energy 21 kcal/mol which tends to produce more stable product 7 through the oxetane ring opening. In addition, the molecular orbitals were calculated and analyzed for all the intermediates, oxetanes and final products.","PeriodicalId":144020,"journal":{"name":"2018 International Conference on Advanced Science and Engineering (ICOASE)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115346069","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-10-01DOI: 10.1109/ICOASE.2018.8548805
Ali Hadi Hasan, Akmam Majid Mosa
This paper involves a proposition of a new method to find the optimal path for centralized and competitive multirobot in the same dynamic environment. These robots can start from different location(s) and destination to the same goal. The method used to hybrid the pheromone trail updating of MAX– MIN ACO (MMAS) algorithm with D* algorithm strategies to construct a trail of the modified (deposited) pheromone which is updated in each iteration. The robots use tour construction probabilities to choose the best solution to move from the start nodes through the dynamic environment, which contains dynamic obstacles moving in free space, by finding and displaying the optimal path for each robot. A number of experimental results simulated on different dynamic environments for different number of robots indicated that the proposed method performed well. The robots are competitive with each other to reach their targets without colliding with obstacles, and they find the optimal path with minimum iterations and minimum total arc cost. Generally, the increase number of the implemented robots increases the occupy time. However, the amount of that increase varies. It goes from (7%) to (15%) when one to two robots are implemented. It is also noticed that the increase in the time occupy turns to be limited in comparison to the previous ratios, i.e. from (27%) to (30%) when four to five robots are implemented.
本文提出了一种在同一动态环境下寻找集中式竞争多机器人最优路径的新方法。这些机器人可以从不同的位置和目的地出发到同一个目标。该方法将MAX - MIN ACO (MMAS)算法的信息素轨迹更新与D*算法策略混合，构建每次迭代更新的修改(沉积)信息素轨迹。机器人通过寻找并显示每个机器人的最优路径，利用行程构建概率选择从起始节点穿过动态环境的最佳解决方案，该动态环境包含在自由空间中移动的动态障碍物。针对不同数量机器人在不同动态环境下的仿真实验结果表明，该方法具有良好的性能。机器人之间相互竞争，在不与障碍物碰撞的情况下到达目标，并以最小的迭代次数和最小的总弧成本找到最优路径。一般来说，机器人数量的增加会增加占用时间。然而，增长的幅度各不相同。当安装一到两个机器人时，这一比例从(7%)上升到(15%)。同样值得注意的是，与之前的比例相比，占用时间的增加变得有限，即当实施4到5个机器人时，从(27%)到(30%)。
{"title":"Multi-Robot Path Planning Based on Max–Min Ant Colony Optimization and D* Algorithms in a Dynamic Environment","authors":"Ali Hadi Hasan, Akmam Majid Mosa","doi":"10.1109/ICOASE.2018.8548805","DOIUrl":"https://doi.org/10.1109/ICOASE.2018.8548805","url":null,"abstract":"This paper involves a proposition of a new method to find the optimal path for centralized and competitive multirobot in the same dynamic environment. These robots can start from different location(s) and destination to the same goal. The method used to hybrid the pheromone trail updating of MAX– MIN ACO (MMAS) algorithm with D* algorithm strategies to construct a trail of the modified (deposited) pheromone which is updated in each iteration. The robots use tour construction probabilities to choose the best solution to move from the start nodes through the dynamic environment, which contains dynamic obstacles moving in free space, by finding and displaying the optimal path for each robot. A number of experimental results simulated on different dynamic environments for different number of robots indicated that the proposed method performed well. The robots are competitive with each other to reach their targets without colliding with obstacles, and they find the optimal path with minimum iterations and minimum total arc cost. Generally, the increase number of the implemented robots increases the occupy time. However, the amount of that increase varies. It goes from (7%) to (15%) when one to two robots are implemented. It is also noticed that the increase in the time occupy turns to be limited in comparison to the previous ratios, i.e. from (27%) to (30%) when four to five robots are implemented.","PeriodicalId":144020,"journal":{"name":"2018 International Conference on Advanced Science and Engineering (ICOASE)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115110650","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-10-01DOI: 10.1109/ICOASE.2018.8548783
R. Zebari, Subhi R. M. Zeebaree, Karwan Jacksi
Nowadays, continuously accessing Internet services is vital for the most of people. However, due to Denial of Service (DoS) and its severe type ‘Distributed Denial of Service (DDoS), online services becomes unavailable to users in sometimes. Rather than DDoS is dangerous and has serious impact on the Internet consumers, there are multiple types of that attack such Slowrise, ping of death and UDP, ICMP, SYN flood, etc. In this paper, the effect of HTTP and SYN flood attack on the most recent and widely used web servers is studied and evaluated. Systematic performance analysis is performed on Internet Information Service 10.0 (IIS 10.0) on Windows server 2016 and Apache 2 on Linux Ubuntu 16.04 Long Term Support (LTS) server. Furthermore, the key metrics of the performance are average response time, average CPU usage and standard deviation as a responsiveness, efficiency and stability of the web servers. The results show that the IIS10.0 outperformed Apache2 web server in efficiency and responsiveness during HTTP flood attack. However, Apache2 web server achievement was more responsive and performed more stability with SYN flood attack.
如今，持续访问互联网服务对大多数人来说是至关重要的。但是，由于DoS (Denial of Service)攻击及其严重的分布式拒绝服务(Distributed Denial of Service)攻击，有时会导致用户无法使用在线服务。DDoS攻击有多种类型，如Slowrise、ping of death和UDP、ICMP、SYN flood等，而不是对互联网消费者有严重的影响。本文研究和评估了HTTP和SYN flood攻击对最新和最广泛使用的web服务器的影响。系统的性能分析是在Windows服务器2016上的Internet Information Service 10.0 (IIS 10.0)和Linux服务器Ubuntu 16.04上的Apache 2上进行的。此外，性能的关键指标是平均响应时间，平均CPU使用率和标准偏差作为响应，效率和web服务器的稳定性。结果表明，在HTTP flood攻击下，IIS10.0在效率和响应速度上都优于Apache2 web服务器。然而，Apache2 web服务器在SYN flood攻击下响应更快，性能更稳定。
{"title":"Impact Analysis of HTTP and SYN Flood DDoS Attacks on Apache 2 and IIS 10.0 Web Servers","authors":"R. Zebari, Subhi R. M. Zeebaree, Karwan Jacksi","doi":"10.1109/ICOASE.2018.8548783","DOIUrl":"https://doi.org/10.1109/ICOASE.2018.8548783","url":null,"abstract":"Nowadays, continuously accessing Internet services is vital for the most of people. However, due to Denial of Service (DoS) and its severe type ‘Distributed Denial of Service (DDoS), online services becomes unavailable to users in sometimes. Rather than DDoS is dangerous and has serious impact on the Internet consumers, there are multiple types of that attack such Slowrise, ping of death and UDP, ICMP, SYN flood, etc. In this paper, the effect of HTTP and SYN flood attack on the most recent and widely used web servers is studied and evaluated. Systematic performance analysis is performed on Internet Information Service 10.0 (IIS 10.0) on Windows server 2016 and Apache 2 on Linux Ubuntu 16.04 Long Term Support (LTS) server. Furthermore, the key metrics of the performance are average response time, average CPU usage and standard deviation as a responsiveness, efficiency and stability of the web servers. The results show that the IIS10.0 outperformed Apache2 web server in efficiency and responsiveness during HTTP flood attack. However, Apache2 web server achievement was more responsive and performed more stability with SYN flood attack.","PeriodicalId":144020,"journal":{"name":"2018 International Conference on Advanced Science and Engineering (ICOASE)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123314102","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-10-01DOI: 10.1109/ICOASE.2018.8548841
A. A. Rasheed, Khalil H. Sayidmarie, K. K. Mohammed
Nanoantennas are suitable components for detection of optical radiation at energies below the bandgap energy of the semiconductor and higher than Schottky barrier of metal/semiconductor interface in photodetectors. Elliptical nanodisk antennas (ENAs) on a Gallium Arsenide (GaAs) substrate are studied to tune the optical response across the near-infrared band. The resonance wavelength, normal field enhancement, and bandwidth of plasmonic resonance are tailored by controlling the size and elliptical aspect ratio. The results are compared with circular nanodisk antennas (CNAs) and ring nanoparticle antennas (RNAs). Silver and gold metal types for nanoantennas are also studied for electric field enhancement, where the Drude model of metals are considered. The surfaces plasmon is proven by comparing with the perfect electric conductor of silver and gold nanoantennas. The obtained results prove that the designed nanoantennas can be used to enhance the operation of photodetectors and solar cells.
{"title":"Tunable Plasmonic Resonances Below Schottky Diode Band-gap Based on Elliptical Nanoantennas","authors":"A. A. Rasheed, Khalil H. Sayidmarie, K. K. Mohammed","doi":"10.1109/ICOASE.2018.8548841","DOIUrl":"https://doi.org/10.1109/ICOASE.2018.8548841","url":null,"abstract":"Nanoantennas are suitable components for detection of optical radiation at energies below the bandgap energy of the semiconductor and higher than Schottky barrier of metal/semiconductor interface in photodetectors. Elliptical nanodisk antennas (ENAs) on a Gallium Arsenide (GaAs) substrate are studied to tune the optical response across the near-infrared band. The resonance wavelength, normal field enhancement, and bandwidth of plasmonic resonance are tailored by controlling the size and elliptical aspect ratio. The results are compared with circular nanodisk antennas (CNAs) and ring nanoparticle antennas (RNAs). Silver and gold metal types for nanoantennas are also studied for electric field enhancement, where the Drude model of metals are considered. The surfaces plasmon is proven by comparing with the perfect electric conductor of silver and gold nanoantennas. The obtained results prove that the designed nanoantennas can be used to enhance the operation of photodetectors and solar cells.","PeriodicalId":144020,"journal":{"name":"2018 International Conference on Advanced Science and Engineering (ICOASE)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122133283","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-10-01DOI: 10.1109/ICOASE.2018.8548940
N. Abd-Ali, Ahmed Raee Madeh
Friction welding is one of the most advanced welding techniques in the world today, due to the ability of this technique to find weld specimens with high performance specifications. The present study deals with friction welding of similar metals (mild steel) and similar metals (aluminium alloy A356) for solid and hollow specimen, also the results were studied analytically methods using ANSYS(16) software program. The fracture force of standard specimens were 576.33 MPa and 105.41 MPa, while this force of welded specimens were 463.64 MPa and 69.04 MPa for mild steel and Al-A356 respectively with reduction about (30%) in equivalent stress values. The hardness was increased at the weld region as a results of the friction pressure and oxidation process and the differences in these value due to the metals nature and its crystal construction. The temperatures distribution in both practical and theoretical methods refers to the symmetrical distribution along the weld region. The fatigue sensitivity of two metals were showed that the minimum life in mild steel was (8523 cycle) while the minimum life in Al-A356 was (1713 cycle) under same load condition.
{"title":"Experimental and Numerical Investigation of Factors That Affecting in Frictional Welding of Mild Steel and Al alloy A356","authors":"N. Abd-Ali, Ahmed Raee Madeh","doi":"10.1109/ICOASE.2018.8548940","DOIUrl":"https://doi.org/10.1109/ICOASE.2018.8548940","url":null,"abstract":"Friction welding is one of the most advanced welding techniques in the world today, due to the ability of this technique to find weld specimens with high performance specifications. The present study deals with friction welding of similar metals (mild steel) and similar metals (aluminium alloy A356) for solid and hollow specimen, also the results were studied analytically methods using ANSYS(16) software program. The fracture force of standard specimens were 576.33 MPa and 105.41 MPa, while this force of welded specimens were 463.64 MPa and 69.04 MPa for mild steel and Al-A356 respectively with reduction about (30%) in equivalent stress values. The hardness was increased at the weld region as a results of the friction pressure and oxidation process and the differences in these value due to the metals nature and its crystal construction. The temperatures distribution in both practical and theoretical methods refers to the symmetrical distribution along the weld region. The fatigue sensitivity of two metals were showed that the minimum life in mild steel was (8523 cycle) while the minimum life in Al-A356 was (1713 cycle) under same load condition.","PeriodicalId":144020,"journal":{"name":"2018 International Conference on Advanced Science and Engineering (ICOASE)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125894289","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-10-01DOI: 10.1109/ICOASE.2018.8548802
Y. Abbas, R. Jidin, N. Jamil, M. Z’aba, Saad Al-Azawi
Lightweight cryptography such as PHOTON or LED has a transform named as Mix-Column-Serial (MCS). Within the MCS, matrix manipulations use Galois polynomial multiplications that require lengthy steps of logical operations. This paper proposes the use of a look-up table with comparators to replace the lengthy steps. As PHOTON’s Galois matrix multiplication produces identical results for pairs of column-row and row-columns, with comparators, the table size is reduced to half. The tables and comparators have been implemented on FPGAs. FPGA’s synthesized results of the newly proposed MCS in the form table with comparators are superior in terms of throughput and area compared to other MCS hardware implementations found in literatures.
{"title":"Small Footprint Mix-Column Serial for PHOTON and LED Lightweight Cryptography","authors":"Y. Abbas, R. Jidin, N. Jamil, M. Z’aba, Saad Al-Azawi","doi":"10.1109/ICOASE.2018.8548802","DOIUrl":"https://doi.org/10.1109/ICOASE.2018.8548802","url":null,"abstract":"Lightweight cryptography such as PHOTON or LED has a transform named as Mix-Column-Serial (MCS). Within the MCS, matrix manipulations use Galois polynomial multiplications that require lengthy steps of logical operations. This paper proposes the use of a look-up table with comparators to replace the lengthy steps. As PHOTON’s Galois matrix multiplication produces identical results for pairs of column-row and row-columns, with comparators, the table size is reduced to half. The tables and comparators have been implemented on FPGAs. FPGA’s synthesized results of the newly proposed MCS in the form table with comparators are superior in terms of throughput and area compared to other MCS hardware implementations found in literatures.","PeriodicalId":144020,"journal":{"name":"2018 International Conference on Advanced Science and Engineering (ICOASE)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127161146","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-10-01DOI: 10.1109/ICOASE.2018.8548848
S. Saber, H. Mohamad, M. Aziz
Antioxidants can control the generation of free radical by terminating the reaction chain. QSAR is method that used to explain the relationship between biological activity and the structure of chemical compounds. The aim of this study to develop QSAR model between antioxidant activity and molecular structure of 1,3,4-triazole derivatives using interval partial least squares (iPLS) as a variable selection method, and PLS as a regression method. After selection methods, six descriptors were selected to build the model. The model with six descriptors can explain 95% variance of antioxidant. The developed QSAR models have been confirmed by r2cal, r2cv, r2pre, RMSEC, RMSECV and RMSEP. The result shows that TDB05s, E2u and H7u are the most significant descriptors in the model which are related to antioxidant activity. These three are 3D descriptors and indicated that 3D descriptors very impotent to antioxidant activities. The final QSAR model can be used as a guide to predict free radical scavenger activities of new synthesized 1,3,4-triazol compounds.
{"title":"Development a QSAR Model of 1,3,4-Triazole Derivatives for Antioxidant Activity Prediction","authors":"S. Saber, H. Mohamad, M. Aziz","doi":"10.1109/ICOASE.2018.8548848","DOIUrl":"https://doi.org/10.1109/ICOASE.2018.8548848","url":null,"abstract":"Antioxidants can control the generation of free radical by terminating the reaction chain. QSAR is method that used to explain the relationship between biological activity and the structure of chemical compounds. The aim of this study to develop QSAR model between antioxidant activity and molecular structure of 1,3,4-triazole derivatives using interval partial least squares (iPLS) as a variable selection method, and PLS as a regression method. After selection methods, six descriptors were selected to build the model. The model with six descriptors can explain 95% variance of antioxidant. The developed QSAR models have been confirmed by r2cal, r2cv, r2pre, RMSEC, RMSECV and RMSEP. The result shows that TDB05s, E2u and H7u are the most significant descriptors in the model which are related to antioxidant activity. These three are 3D descriptors and indicated that 3D descriptors very impotent to antioxidant activities. The final QSAR model can be used as a guide to predict free radical scavenger activities of new synthesized 1,3,4-triazol compounds.","PeriodicalId":144020,"journal":{"name":"2018 International Conference on Advanced Science and Engineering (ICOASE)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127003306","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-10-01DOI: 10.1109/ICOASE.2018.8548792
Akram R. Nasser, Ghusoon M. Ali
The effect of the crystalline orientation of n-type porous silicon (PSi) on an integrated interdigitated extended-gate field-effect-transistor (IEGFET) pH sensor performance was studied. The PSi n-type <100> and n-type <111> are prepared by a Laser-assistant etching method (LAEM) as sensing layer in the same conditions. The scanning electron microscope (SEM) revealed that the PSi pore size and depth of n-type <100> are 1 to 4.5 µm and 1.5 µm, respectively, whereas for n-type <111> sample are 2 to 4 µm and 0.4 µm, respectively. The integrated interdigitated electrode consists of the reference and the extended gate on a single PSi sensing substrate. The n-type <100> PSi and n-type <111> PSi as the sensing layers were compared and contrast in the pH range from 3 to 11. n-type <111> PSi does not exhibit any pH sensitivity. On another hand, The n-type <100> PSi sensing layer shows a better sensitivity as compared to n-type <111> PSi. The voltage and current sensitivities of n-type <100> PSi are found to be 13 mV/pH and 30.94 µA/ pH, respectively. The sensitivity enhancement for n<100> sample is attributed to the larger porosity and pore deepest, as compared to for n-type <111> which that result in a higher surface area/volume ratio which causes better sensitivity. The studied IEGFET based on PSi is a completely solid-state device which opens a new area to investigate of miniaturization pH.
{"title":"Orientation Effect of n-Type PSi on Integrated Interdigitated Electrode EGFET pH Sensor Performance","authors":"Akram R. Nasser, Ghusoon M. Ali","doi":"10.1109/ICOASE.2018.8548792","DOIUrl":"https://doi.org/10.1109/ICOASE.2018.8548792","url":null,"abstract":"The effect of the crystalline orientation of n-type porous silicon (PSi) on an integrated interdigitated extended-gate field-effect-transistor (IEGFET) pH sensor performance was studied. The PSi n-type <100> and n-type <111> are prepared by a Laser-assistant etching method (LAEM) as sensing layer in the same conditions. The scanning electron microscope (SEM) revealed that the PSi pore size and depth of n-type <100> are 1 to 4.5 µm and 1.5 µm, respectively, whereas for n-type <111> sample are 2 to 4 µm and 0.4 µm, respectively. The integrated interdigitated electrode consists of the reference and the extended gate on a single PSi sensing substrate. The n-type <100> PSi and n-type <111> PSi as the sensing layers were compared and contrast in the pH range from 3 to 11. n-type <111> PSi does not exhibit any pH sensitivity. On another hand, The n-type <100> PSi sensing layer shows a better sensitivity as compared to n-type <111> PSi. The voltage and current sensitivities of n-type <100> PSi are found to be 13 mV/pH and 30.94 µA/ pH, respectively. The sensitivity enhancement for n<100> sample is attributed to the larger porosity and pore deepest, as compared to for n-type <111> which that result in a higher surface area/volume ratio which causes better sensitivity. The studied IEGFET based on PSi is a completely solid-state device which opens a new area to investigate of miniaturization pH.","PeriodicalId":144020,"journal":{"name":"2018 International Conference on Advanced Science and Engineering (ICOASE)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130518141","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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