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All Journal Journal of Engineering and Scientific Research (JESR) Journal of Applied Science, Engineering and Technology (J. ASET)
Fadil Hamdani
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Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering Engineering Industrial & Manufacturing Engineering

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Modification of the Traditional Inkjet Printer for Printing a Three-Dimensional (3D) Tissue Engineered Human Cell-Matrix System Al Tayasneh M Abd Alkarim; Irza Sukmana; Fadil Hamdani; Bassem Abu Zneid
Journal of Applied Science, Engineering and Technology Vol. 2 No. 1 (2022): June 2022
Publisher : INSTEP Publishing Network

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47355/aset.v2i1.32

Abstract

Bioprinting has grabbed attention in recent years. To study the behavior of living organisms on the basic level, bio-medical engineers have introduced bioprinting as a cheap and affordable method to construct and fabricate tissues using cells and positioning methods along with cell culture techniques. The applications such as the use of perfused three-dimensional (3D) human cardiac tissues for toxicological research, drug testing, and screening or personalized medicine. Moreover, it helps to develop in-vitro tissue test systems, with which one can explore basic cellular behaviors, disease progression, and treatment options. A standard thermal inkjet printer was modified to accomplish the bioprinting. Cell viability was determined. We made two types of printing 3D and 2D. The 3D printing is much closer and mimics the in vivo condition and allows more cells to be printed per unit space.
SNR Gain Evaluation in Narrowband IoT Uplink Data Transmission with Repetition Increment: A Simulation Approach Fadil Hamdani; Misfa Susanto; Tshiamo Sigwele
Journal of Engineering and Scientific Research Vol. 5 No. 1 (2023)
Publisher : Faculty of Engineering, Universitas Lampung Jl. Soemantri Brojonegoro No.1 Bandar Lampung, Indonesia 35141

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jesr.v5i1.160

Abstract

Deploying Internet of Things (IoT) on a large scale necessitates widespread network infrastructures supporting Machine Type Communication. Integrating IoT into cellular networks like LTE, known as Narrowband-IoT (NB-IoT), can fulfill this infrastructure need. Standard 3GPP Release 13 introduces NB-IoT's Repetition features, expanding radio transmission coverage while maintaining LTE performance. Focusing on uplink data traffic, this study examines NB-IoT's repetition mechanism, grid resource distribution, and NPUSCH performance through simulations. Results show that at SNR greater than -5 dB, maximum repetitions of 128 yield the highest BLER, while minimum repetitions of 2 result in the lowest. Quadrupling repetitions increases SNR by 5 dB, emphasizing repetition's role in error mitigation and uplink reliability, especially in challenging SNR conditions. For optimal throughput in SNR above -5 dB, maximum repetitions of 128 for NPUSCH format 1 are recommended. These findings underscore the importance of repetition in enhancing Narrowband IoT performance, offering insights for system optimization, where increasing the number of repetitions generally leads to higher SNR gain. The attained BLER and throughput values from Narrowband IoT simulations highlight the robustness of data transmission across varying channel conditions, affirming NB-IoT applicability to a wide range of IoT applications.
Co-Authors Al Tayasneh M Abd Alkarim Bassem Abu Zneid Irza Sukmana Misfa Susanto Tshiamo Sigwele