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Ahmad M. Abu-Jrai,Ala’a H. Al-Muhtaseb,Jehad A. Yamin,Khalid A. Ibrahim,Omar A. Al-Khashman,Mouath A. Al-Shaweesh,Muhannad A. Hararah,Umer Rashid,Mohammad Ahmad,Gavin M. Walker 한국공업화학회 2014 Journal of Industrial and Engineering Chemistry Vol.20 No.4
The performance of a highly cross-linked polyethylene catalyst supported on alumina for low temperature selective catalytic reduction of NOx by unburned hydrocarbons (HCs) existing in an exhaust gas was examined at different engine conditions with the addition of exhaust-gas recirculation. The HXPE catalyst was shown to exhibit good NOx reduction activity at low temperatures (100–250℃) where the only reductant was the unburned HC, which was already present in the exhaust flow. The maximum NOx reduction of approximately 52% was achieved at a temperature of 150℃. HXPE demonstrated very good selectivity toward N2 in the majority of tested conditions ( 80%).
Rashid Md Al Mamunur,Kim Junkyu,Long Dang Xuan,Kwak Kyungwon,Hong Jongin 대한화학회 2022 Bulletin of the Korean Chemical Society Vol.43 No.5
Density functional theory (DFT), time-dependent DFT, and Marcus theory were used to probe the optoelectronic and charge-transport properties of compounds obtained by inserting long-chain aliphatic alkenes or condensed aromatic rings between the planar quinacridone core and the terminal donor diphenylamine moiety of a reference hole-transporting material (HTM). Compared to the reference HTM, its newly designed derivatives showed lower-lying highest occupied molecular orbitals that were well matched in energy with the valence band maximum of a representative perovskite absorber. HTMs obtained via the insertion of condensed aromatic rings showed higher hole mobilities than those obtained via the insertion of aliphatic alkenes. Overall, hole mobility was mainly influenced by the charge-transfer integral, while other factors, such as the hole reorganization energy, hole hopping rate, and centroid distance, had only minor effects.
Rashid Al-Jomard,Zouhair Amarin 대한해부학회 2017 Anatomy & Cell Biology Vol.50 No.2
The angiogenic theory to the development of human lymphatics is not clear. The objective of this study was to investigate the development of human lymphatics. Semi-thin and thin paraffin sections from human mature cystic ovarian teratoma tissues were studied using light and electron microscopy. Lymphatics were formed by the differentiation of mesenchymal cells that gradually acquired morphological features of endothelial cells. It is suggested that in human mature cystic ovarian teratoma the lymphatic endothelium develops from mesenchymal cells, and not from cells derived from mature endothelium of a preexisting vein or lymphatic.
Heat of formation prediction by G4MP2-SFM schemes: An application to various nitroazole derivatives
Rashid, Md Al Mamunur,Cho, Soo Gyeong,Choi, Cheol Ho Elsevier 2018 Computational & theoretical chemistry Vol.1130 No.-
<P><B>Abstract</B></P> <P>Our G4MP2-SFM parameterization schemes have been applied to the various azole derivatives including imidazole, triazole, tetrazole, imidazolidine, [1,2,4]triazolo[4,3-a][1,3,5]triazine, tetrazine and pyrimidine, in order to establish a set of parameters for the reliable and fast heat of formation ( Δ H f o ) predictions. It is shown that a parameterization on such complex systems is possible, yielding an overall mean absolute deviation (MAD) and root mean square deviation (RMSD) to be 3.5 kcal/mol and 4.3 kcal/mol, respectively compared to full G4MP2. During the development of the parameters, we have found that nonbonded interactions are very important to predict the Δ H f o of high energy materials (HEMs). While both molecular weight and the number of NO<SUB>2</SUB> substituents rarely affect the Δ H f o magnitude, the geometric configurations and the number of heteroatoms in the azole ring significantly change it.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Our parameterization for Heat of Formation yielded MAD and (RMSD) of 3.5 and 4.3 kcal/mol, respectively. </LI> <LI> Nonbonded interactions are very important to predict the Δ H f o of HEMs. </LI> <LI> The geometric configurations and the number of heteroatoms mainly determine the Δ H f o . </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>
Harun-Al-Rashid, Ahmed,Yang, Chan-Su Informa UK (TaylorFrancis) 2018 International journal of remote sensing Vol.39 No.13
<P>In this study, hourly shift of green tide (GT) in the Yellow Sea (YS) during summer of 2015 and 2016 is investigated using Geostationary Ocean Color Imager-based normalized difference vegetation index images. The GT started blooming around 45 and 8km away from the coasts in the western parts of the YS during May 2015 and May 2016, respectively. The GT patches shifted northwards during June, and afterwards were spread out into the western and central YS until early July. During those periods, their average speeds were estimated as 1.97 +/- 0.80 and 1.51 +/- 0.55km h(-1) in 2015 and 2016, respectively. In spite of the significant hourly shift speeds, they did not move much for a day due to frequent direction changes between hours. By July, most of the GT patches dissipated from the YS; however, far apart in Korea Bay and offshore Gyeonggi Bay, Korea, some small short-lived patches were traced during August. GT coverage in 2016 increased considerably than those of 2015 and 2008 by almost 23% and 100%, respectively, which might have facilitated by a 2-3 degrees sea surface temperature rise. This study provides an insight on hourly temporal dynamics which would be helpful for monitoring their changes and distribution.</P>
러쉬드(Ahmed Harun-Al-Rashid),양찬수(Chan-Su Yang) 한국연안방재학회 2016 한국연안방재학회지 Vol.3 No.3
Sea fog is a common oceanic weather phenomenon that sometimes results in ship wrecks from reduced visibility; hence needs to be monitored regularly. The Geostationary Ocean Color Imager (GOCI) provides 500m spatial resolution hourly during the daytime. Knowing the trend of sea fog movement over time specific to regions and seasons have the feasibility to predict the future positions of sea fog detected from GOCI in the upcoming hours. Keeping this objective in mind the present study is conducted to estimate the shift of sea fog in relation to the advection of WRF model sea surface wind in the East Sea region for some selected sea fogs in February to April 2014. The advection of sea fog was measured considering the shift of easily traceable pixels located on the boundary of sea fog from consecutive hours GOCI images. Then the sea fog advection was analyzed in relation to sea surface wind advection data extracted from WRF wind model data. For most of the sea fogs the speed is found to be more than 3 ms-1 with the highest value of 23.63 ms-1, whereas in a few cases surface wind speed at 10 m above ground level (AGL) was found to be higher than 3 ms-1. However, it was found that the changes in the directions of sea fogs and surface winds shows similar trends.
북극해와 북해에서의 해빙 관련 최신 동향(2017년 7월까지)
하룬 알 러쉬드 아메드(Ahmed Harun-Al-Rashid):양찬수(Chan-Su Yang ) 한국연안방재학회 2017 한국연안방재학회지 Vol.4 No.3
The Arctic region remains surrounded by sea ice during most of the period of the year. In the Arctic Ocean the Northern Sea Route (NSR) has been used as an important route for shipping. The arctic sea ice is decreasing since 1979; hence needs to be monitored. In this research work sea ice concentration in the recent years and sea ice concentration anomalies of few months with long term sea ice concentration are studied. The climatology of long term ice concentration data from various satellites, and the recent sea ice concentration data from Advanced Microwave Scanning Radiometer 2 (AMSR2) were used. The results show that sea ice concentration and sea ice extent in the Arctic region decreased by around 5% from 2015 to 2016, but in 2017 increased again in smaller amount in some areas like around Novaya Zemlya, and parts of the sea in between Greenland and Longyearbyen, and around Banks Island. The percentages of sea ice area in NSR for July 7 in 2015 to 2017 were 37%, 39% and 33%, respectively, indicating a large area (around ten thousand km 2 ) become ice free in 2017 compared to the previous year.
Donkey and smuggler optimization algorithm: A collaborative working approach to path finding
Ahmed S. Shamsaldin,Tarik A. Rashid,Rawan A. Al-Rashid Agha,Nawzad K. Al-Salihi,Mokhtar Mohammadi 한국CDE학회 2019 Journal of computational design and engineering Vol.6 No.4
Swarm Intelligence is a metaheuristic optimization approach that has become very predominant over the last few decades. These algorithms are inspired by animals’ physical behaviors and their evolutionary perceptions. The simplicity of these algorithms allows researchers to simulate different natural phenom-ena to solve various real-world problems. This paper suggests a novel algorithm called Donkey and Smuggler Optimization Algorithm (DSO). The DSO is inspired by the searching behavior of donkeys. The algorithm imitates transportation behavior such as searching and selecting routes for movement by donkeys in the actual world. Two modes are established for implementing the search behavior and route-selection in this algorithm. These are the Smuggler and Donkeys. In the Smuggler mode, all the pos-sible paths are discovered and the shortest path is then found. In the Donkeys mode, several donkey behaviors are utilized such as Run, Face & Suicide, and Face & Support. Real world data and applications are used to test the algorithm. The experimental results consisted of two parts, firstly, we used the stan-dard benchmark test functions to evaluate the performance of the algorithm in respect to the most pop-ular and the state of the art algorithms. Secondly, the DSO is adapted and implemented on three real-world applications namely; traveling salesman problem, packet routing, and ambulance routing. The experimental results of DSO on these real-world problems are very promising. The results exhibit that the suggested DSO is appropriate to tackle other unfamiliar search spaces and complex problems.