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Angle-Based Localization and Security Enhancement in Optical Camera Communication
Md. Faisal Ahmed,Md. Shahjalal,Md. Morshed Alam,Yeong Min Jang 한국통신학회 2021 한국통신학회 학술대회논문집 Vol.2021 No.6
In this article, we have designed an optical camera communication-based system that monitor the temperature and status of the valve position in the factory environment. We have used an AM2302 temperature sensor to collect the temperature data from the surrounding and transmit as an optical signal using LED. The image sensor received the optical signal and retrieve data based on rolling shutter effect of the camera. Neural network based LED detection is perform to find exact position of the LED in image sensor. Before data decoding, the output signal is processed using the unique key to enhance the security protocol. The entire process is performed in Python 3.8 environment.
Faisal Ahmed Shanta,Md Abdullah Al Bari 국제구조공학회 2022 Structural Engineering and Mechanics, An Int'l Jou Vol.84 No.5
Additive manufacturing is an emerging method to manufacture objects with complex shapes and intricate geometry, such as cellular structures. The cellular structures can widely be used in lightweight application as it provides a high strength-toload ratio. Under the various testing condition, each topology shows different mechanical properties. This study investigates the structural response of various types of cellular structures in compression loading, both experimentally and numerically. For that purpose, honeycomb, modified honeycomb, and spiral-type topology were selected to investigate. Besides, structural properties change by changing the cell size for each topology is also investigated. The specimens were subjected to a compression test by a universal testing machine to determine the absorbed energy and other mechanical properties. An implicit numerical study was also conducted to determine cellular structure’s mechanical characteristics. The experimental and numerical results show that the honeycomb structure absorbs the maximum energy compared to the other structures. The experimentally and numerically calculated absorbed energy for the 4.8 mm honeycomb structure was 32.2J and 30.63J, respectively. The results also show that the increase of cell size for a particular cellular structure reduces the energy-absorbing ability of that structure.
Md. Shihabul Islam,Chowdhury Arif Jahangir,Md. Sifat Rahi,Md. Mahmudul Hasan,Salek Ahmed Sajib,Kazi Md. Faisal Hoque,Md Abu Reza 한국독성학회 2020 Toxicological Research Vol.36 No.1
Cancer is the second death causing disease all over the world and until today 100 different types of cancer have been identified whose treatment methods consist of serious side effects on human body. To reduce the frequency of adverse effects of cancer treatment, nowadays plant derived natural components are getting priority. The plant Morus latifolia is widely available in northern part of Bangladesh. The earlier researches suggested that popular varieties of some Morus sp. like Morus alba, Morus indica etc. have good anti-proliferative activity. Hence, this study was designed to evaluate the anti-proliferative activity of leaf and bark extracts of M. latifolia against Ehrlich’s ascites carcinoma (EAC) in vivo. The leaf and bark extracts of M. latifolia were used in several bioassays including Brine shrimp lethality test, hemagglutination activity test, antioxidant activity test, and cell growth inhibition test. Besides, fluorescence microscopy was performed to study apoptotic features in EAC cells, and molecular analysis like real-time PCR were also conducted. The results of Brine shrimp lethality test, hemagglutination activity test, and antioxidant activity assay supported the cell growth inhibition capability of leaf and bark extracts which was confirmed by in vivo cell growth inhibition bioassay. Moreover, the experimental extracts were able to induce cell apoptotis through altering the expression pattern of Bcl-2 and Bax genes. All of the results of this study suggest that several noble compounds are present in M. latifolia plant extracts which are capable for healing cancer cells.
Self-Gated Rectified Linear Unit for Performance Improvement of Deep Neural Networks
Israt Jahan,Md. Faisal Ahmed,Md. Osman Ali,Yeong Min Jang 한국통신학회 2023 ICT Express Vol.9 No.3
This technical paper proposes an activation function, self-gated rectified linear unit (SGReLU), to achieve high classification accuracy, low loss, and low computational time. Vanishing gradient problem, dying ReLU, noise vulnerability are also resolved in our proposed SGReLU function. SGReLU’s performance is evaluated on MNIST, Fashion-MNIST, and Imagenet datasets and compared with seven highly effective activation functions. We obtained that the proposed SGReLU outperformed other activation functions in most cases in VGG16, Inception v3, and ResNet50. In VGG16 and Inception v3, it achieved an accuracy of 90.87% and 95.01%, respectively, exceeding other functions with the second-fastest computing time in these networks.
Sayam Abdullah,Rahman A. N. M. Masudur,Rahman Md. Sakibur,Smriti Shamima Akter,Ahmed Faisal,Rabbi Md. Fogla,Hossain Mohammad,Faruque Md. Omar 한국탄소학회 2022 Carbon Letters Vol.32 No.5
The utilization of carbonaceous reinforcement-based polymer matrix composites in structural applications has become a hot topic in composite research. Although conventional carbon fiber-reinforced polymer composites (CFRPs) have revolutionized the composite industry by offering unparalleled features, they are often plagued with a weak interface and lack of toughness. However, the promising aspects of carbon fiber-based fiber hybrid composites and hierarchical composites can compensate for these setbacks. This review provides a meticulous landscape and recent progress of polymer matrix-based different carbonaceous (carbon fiber, carbon nanotube, graphene, and nanodiamond) fillers reinforced composites’ mechanical properties. First, the mechanical performance of neat CFRP was exhaustively analyzed, attributing parameters were listed down, and CFRPs’ mechanical performance barriers were clearly outlined. Here, short carbon fiber-reinforced thermoplastic composite was distinguished as a prospective material. Second, the strategic advantages of fiber hybrid composites over conventional CFRP were elucidated. Third, the mechanical performance of hierarchical composites based on carbon nanotube (1D), graphene (2D) and nanodiamond (0D) was expounded and evaluated against neat CFRP. Fourth, the review comprehensively discussed different fabrication methods, categorized them according to performance and suggested potential future directions. From here, the review sorted out three-dimensional printing (3DP) as the most futuristic fabrication method and thoroughly delivered its pros and cons in the context of the aforementioned carbonaceous materials. To conclude, the structural applications, current challenges and future prospects pertinent to these carbonaceous fillers reinforced composite materials were elaborated