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Jawad Ahmed 한국고분자학회 2024 Macromolecular Research Vol.32 No.3
This study investigates the effects of electron beam (E-beam) irradiation on ethylene-vinyl acetate copolymer/ternary polyamide (EVA/tPA) blends with varying vinyl acetate (VA) content (19%, 28%, and 33%). The EVA/tPA blends were exposed to E-beam doses ranging from 50 to 300 kGy, with the addition of trimethylolpropane triacrylate (TMPTMA) and triallyl isocyanurate (TAIC) as crosslinking co-agents. SEM analysis and FTIR spectroscopy confirmed that increasing the VA content in the EVA/tPA blends significantly improved compatibility after E-beam irradiation, resulting in enhanced tensile strength, storage modulus, and surface smoothness. The EVA/tPA/TMPTMA blend with 33% VA content exhibited a remarkable 132% increase in tensile strength and a 212% increase in storage modulus due to enhanced crosslinking formation post-irradiation. However, irradiation led to a decrease in elongation at break and blend crystallinity. TMPTMA co-agents demonstrated superior compatibility compared to TAIC, further enhancing the overall properties of the EVA/tPA blends. In conclusion, E-beam irradiation is an effective technique for producing high-performance EVA/tPA blends by utilizing higher VA content and suitable co-agents. These improved materials hold great potential for various applications, particularly in the oil pipeline and automotive industries.
An improved co-training approach for document Sentiment classification
Jawad Khan(자와드 칸),Aftab Alam(아프타 발람),Muhammad Numan Khan(무함마드 누만 칸),Irfan Ullah(이르판 울라),Muhammad Umair(무하마드 우매르),Umair Qudus(구두스 우매르),Tariq Habib Afridi(타리크 하비브 아프리디),Sung Soo Park(박성수),Young-Koo Lee( 한국정보과학회 2020 한국정보과학회 학술발표논문집 Vol.2020 No.7
Jawad, Laith,Sadighzadeh, Zahra,Salarpouri, Ali,Aghouzbeni, Seyed The Ichthyological Society of Korea 2013 韓國魚類學會誌 Vol.25 No.3
A malformation of the anal fin in longfin trevally, Carangoides armatus, is described and compared with normal specimens. The fish specimen is clearly shown anal fin deformity with missing of 3 spines and 6 rays. The remaining eleven anal fin rays are shorter than those in the normal specimen. The causative factors of this anomaly were discussed.
Jawad Yousaf,Hosang Lee,Wansoo Nah 대한전기학회 2018 Journal of Electrical Engineering & Technology Vol.13 No.5
This study presents states-of-the art overview of the system level electrostatic discharge (ESD) analysis and testing. After brief description of ESD compliance standards and ESD coupling mechanisms, the study provides an in-depth review and comparison of the various techniques for the system level ESD coupling analysis using time and frequency domain techniques, full wave electromagnetic modeling and hybrid modeling. The methods used for improving system level ESD testing using troubleshooting and determining the root causes of soft failures, the optimization of ESD testing and the countermeasures to mitigate ESD problems are also discussed.
Fuzzy sliding mode control algorithm for a four-wheel skid steer vehicle
Jawad Aslam,Shi-Yin Qin,Muhammad Adnan Alvi 대한기계학회 2014 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.28 No.8
This research designs and implements a robust dynamic feedback controller for a four-wheel skid steering vehicle (SSV) under highspeedcornering motion. First, SSV dynamics are modeled and analyzed to construct the simulation environment and to validate the performanceof the proposed algorithm. A robust fuzzy-sliding mode controller is then designed to offset the effect of forces induced bywheel—soil interaction during skidding and ground-level fluctuations. It also eliminates the chattering phenomena encountered withconventional sliding mode control. Given P-3AT mobile robot parameters for trajectory tracking and velocity setting, extensive simulationresults demonstrate the effectiveness of the proposed controller.