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SSRN 2025年

作者： Prakoso, Akbar Teguh Basri, Hasan Adanta, Dendy Gunawan Akbar, Imam Syahrom, Ardiyansyah Arifin, Amir Department of Mechanical Engineering Faculty of Engineering Universitas Sriwijaya Indralaya South Sumatra 30662 Indonesia Doctoral Program Study of Engineering Science Faculty of Engineering Universitas Sriwijaya Palembang South Sumatra30139 Indonesia Applied Mechanics and Design Faculty of Mechanical Engineering Universiti Teknologi Malaysia Johor Bahru Skudai81310 Malaysia Universiti Teknologi Malaysia Johor Bahru Skudai81310 Malaysia

This paper attempts to optimise the single screw extrusion (SSE) process parameters for extruding polylactic acid (PLA)/magnesium (Mg)/hydroxyapatite (HA) composite filament, aiming for a final filament diameter of 1.75 mm to enhance process efficiency and output quality. In this study, the Taguchi method was employed to systematically evaluate how screw speed, nozzle diameter, material composition, and temperature affect filament diameter. The analysis demonstrated that screw speed, nozzle diameter, material composition, and temperature significantly affect the filament diameter. Under optimal conditions (94% wt PLA, 4% wt Mg, and 2% wt HA, 1.95 mm nozzle diameter, 6 rpm screw speed, and 175°C), the resulting filament diameter closely approached 1.75 mm. These findings enhance the fabrication efficiency and quality of composite filaments, with promising applications in advanced bone scaffolds. © 2025, The Authors. All rights reserved.

关键词： Scaffolds (biology)

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Household bleach products as high-performance and cost-effective cleaning agents for membrane fouling

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South African Journal of Chemical engineering 2023年 46卷 35-41页

作者： Mulyati, Sri Rosnelly, Cut Meurah Syamsuddin, Yanna Ambarita, Aulia Chintia Muchtar, Syawaliah Department of Chemical Engineering Universitas Syiah Kuala Banda Aceh 23111 Indonesia Doctoral Program School of Engineering Science Universitas Syiah Kuala Banda Aceh 23111 Indonesia

It has been widely known that polymeric membrane such as polyvinylidene fluoride (PVDF) is very prone to fouling that occurs during the filtration process. In the same light, membrane cleaning has also been popularly used as a mean to remove foulants which accumulated on or inside the membrane. In this paper, the utilization of domestic bleach, which is affordable and easily found in the nearest markets, as the membrane cleaning agent is discussed. The performance evaluation is conducted on three kinds of commercial domestic bleaches, namely Bayclin, Proclin, and Soclin. In order to study deeper about those product potentials, the performance is compared with the pure sodium hypochloride (NaOCl) which has been known as a common chemical cleaning agent, and distillate water. The results show that the bleach products work excellence in cleaning the fouled membrane which confirmed by the scanning electron microscopy (SEM) analysis results, in which membranes cleaned with the bleaches have cleaner surface compared to that cleaned with distillate water. Interestingly, the positive outcome can also be seen in the flux recovery ratio (FRR) of the membranes after cleaning which managed to recover up to 95% of the lost flux. Overall, all three bleach products showed closely similar performance as the original NaOCl, and showed far better performance than distillate water. This result emphasizes that the domestic bleaches are highly promising to be membrane chemical cleaning agents, replacing the common chemicals. This work makes a significant contribution toward giving reasonably priced options for alternative methods of cleaning membranes. © 2023 The Author(s)

关键词： Bleaches Fouling FRR Membrane cleaning NaOCl

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Hand-Woven Fabric Motif Recognition Methods: A Systematic Literature Review 3

Hand-Woven Fabric Motif Recognition Methods: A Systematic Li...

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3rd International Conference on Informatics, Multimedia, Cyber, and Information System, ICIMCIS 2021

作者： Noprisson, Handrie Ermatita, Ermatita Abdiansah, Abdiansah Ayumi, Vina Purba, Mariana Utami, Marissa Universitas Sriwijaya Doctoral Program in Engineering Palembang Indonesia Universitas Sriwijaya Faculty of Computer Science Palembang Indonesia Program of Informatics Management Politeknik Anika Palembang Indonesia Muhammadiyah University of Bengkulu Faculty of Engineering Bengkulu Indonesia

ISBN: (纸本)9781665427333

Knowledge of hand-woven motif recognition is only owned by the older generation, which has not been passed down to the younger generation. Moreover, computer technology can be used to support the recognition of traditional woven fabric motifs. The aim of this research is to conduct a literature review on hand-woven fabric motif recognition, with an emphasis on performance accuracy, techniques, and datasets utilized. This research included three distinct stages of systematic literature review (SLR): planning, execution, and reporting of findings. We found several datasets between 924,845 data and the number of classes between 3-25 class. Based on research result, we obtained several methods for hand-woven fabric motif recognition focused on performance examination. We recommended image pre-processing method, including Adaptive Filtering Denoising, Adaptive Wiener Filtering, Histogram Equalization, Gradient Pyramid (GP) Decomposition. Moreover, we suggested five feature extraction methods, including Radon Transform, Wavelet Transform, Locally Rotation Invariance Measure (LBP-ROR), Transform Invariant Low-Rank Textures (TILT) and Histogram of Oriented Gradients (HOG). For learning method, we recommend Fuzzy C-Mean (FCM), Convolutional neural network (CNN), Deep Neural Network (DNN), MobileNets, Inception-v3 and ResNet-50. © 2021 IEEE.

关键词： Weaving

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Grid environment for computational astrophysics driven by GRAPE-6 with HMCS-G and OmniRPC

Grid environment for computational astrophysics driven by GR...

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19th IEEE International Parallel and Distributed Processing Symposium, IPDPS 2005

作者： Boku, Taisuke Onuma, Kenji Sato, Mitsuhisa Nakajima, Yoshihiro Takahashi, Daisuke Graduate School of Systems and Information Engineering University of Tsukuba Center for Computational Sciences University of Tsukuba Doctoral Program of Systems and Information Engineering University of Tsukuba

ISBN: (纸本)0769523129

In computational astrophysics, the effect of gravity is essential even with very heavy computation of O(N2) for N particles. Several special purpose machines have been implemented as gravity engine to handle this problem extremely fast, however there are few sites in the world to operate such systems. We have developed a grid environment to access such a system based on grid-RFC, named HMCS-G. Using HMCS-G, a multi-physical computational astrophysics simulation can be performed with the combination of a PC-cluster and the gravity engine GRAPE-6. In typical size of problems for galaxy formation, however, the computation power of PC-cluster is much weaker than that of GRAPE-6, and we need multiple sets of PC-clusters to share the power of GRAPE-6 on grid environment. We have developed such a system using OmniRPC, a grid-enabled RPC system. In this system, OmniRPC are used both to distribute jobs for parameter search on multiple PC-clusters and to access GRAPE-6 server from these clusters. We performed an actual problem to search several formations of galaxy on this system, and confirmed such a solution is useful for wide variety of computational astrophysics research.

关键词： Distributed computer systems

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Speeding Up Quantum Measurement Using Space-Time Trade-Off

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Physical Review Letters 2025年第8期134卷 080801-080801页

作者： Christopher Corlett Ieva Čepaitė Andrew J. Daley Cica Gustiani Gerard Pelegrí Jonathan D. Pritchard Noah Linden Paul Skrzypczyk Quantum Engineering Centre for Doctoral Training University of Bristol Tyndall Avenue Bristol BS8 1FD United Kingdom H.H. Wills Physics Laboratory University of Bristol Tyndall Avenue Bristol BS8 1TL United Kingdom Department of Physics and SUPA University of Strathclyde Glasgow G4 0NQ United Kingdom Clarendon Laboratory University of Oxford Parks Road Oxford OX1 3PU United Kingdom LIP6 CNRS Sorbonne Université 4 Place Jussieu 75005 Paris France School of Mathematics University of Bristol Fry Building Woodland Road Bristol BS8 1UG United Kingdom CIFAR Azrieli Global Scholars Program CIFAR Toronto Canada

We present a scheme for speeding up quantum measurement. The scheme builds on previous protocols that entangle the system to be measured with ancillary systems. In the idealized situation of perfect entangling operations and no decoherence, it gives an exact space-time trade-off meaning the readout speed increases linearly with the number of ancilla. We verify this scheme is robust against experimental imperfections through numerical modeling of gate noise and readout errors, and under certain circumstances our scheme can even lead to better than linear improvement in the speed of measurement with the number of systems measured. This hardware-agnostic approach is broadly applicable to a range of quantum technology platforms and offers a route to accelerate midcircuit measurement as required for effective quantum error correction.

关键词： Quantum entanglement

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Investigation of kinetics of amla (Emblica officinalis) fruit drying process

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South African Journal of Chemical engineering 2022年 41卷 10-16页

作者： Raaf, Auliyaa Putra, Tomy Wijaya Mulana, Farid Syamsuddin, Yanna Supardan, Muhammad Dani Doctoral Program School of Engineering Post Graduate Program Universitas Syiah Kuala Banda Aceh 23111 Indonesia Department of Chemical Engineering Universitas Syiah Kuala Banda Aceh 23111 Indonesia Halal Research Center Universitas Syiah Kuala Banda Aceh 23111 Indonesia

This study aims to investigate the kinetics of the amla fruit drying process using oven and sun drying methods. The experimental results indicate that the final moisture content dropped with increasing drying temperature and decreasing material size. Oven drying has a faster drying time than sun drying. The heat loss during oven drying is lower than during sun drying, so the drying rate constant (k) for the oven drying method is higher than for sun drying. Moisture ratios for each drying condition are evaluated using three thin-layer models: Handerson–Pabis, Page, and Newton. The coefficient determination (R²) was used as a statistical parameter to determine the best drying kinetics model. Among the drying models examined, the Page model had the highest accuracy. An increase in drying temperature and a decrease in material size caused the effective moisture diffusivity value (D_eff) to increase. The D_eff values ranged from 4.522×10⁻¹⁰ to 1.361×10⁻⁹ m²/s. Analysis using scanning electron microscopy showed that the microstructure of amla fruit was significantly affected by varied drying conditions. © 2022 The Author(s)

关键词： Amla Diffusivity Drying models Microstructure Moisture content

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Pattern Recognition System Using Evolvable Hardware

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Systems and Computers in Japan 2000年第4期31卷 1-11页

作者： Iwata, Masaya Kajitani, Isamu Murakawa, Masahiro Hirao, Yuji Iba, Hitoshi Higuchi, Tetsuya Electrotechnical Laboratory Ibaraki 305-8568 Japan Doctoral Program in Engineering University of Tsukuba Ibaraki 305-8573 Japan Graduate School of Engineering University of Tokyo Tokyo 113-8656 Japan Graduate School of Engineering University of Tokushima Tokushima 770-8506 Japan

We have developed a high-speed pattern recognition system using evolvable hardware (EHW). EHW is hardware that can change its own structure by genetic learning for maximum adaptation to the environment. The purpose of the system is to show that recognition devices based on EHW are possible and that they have the same robustness to noise as devices based on an artificial neural network (ANN). The advantage of EHW compared with ANN is the high processing speed and the readability of the learned result. In this paper, we describe the learning algorithm, the architecture, and the experiment involving a pattern recognition system that uses EHW. We also compare the processing speed of the pattern recognition system with two types of ANN dedicated hardware and discuss the performance of the system. © 2000 Scripta Technica.

关键词： Genetic algorithms evolvable hardware adaptive hardware Pattern Recognition System intelligibility evolvable hardware Genetic Algorithm (GA)

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Determination of road pavement based on local conditions

Determination of road pavement based on local conditions

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The 2015 1st International Conference on Civil,Architectural,Structural and Constructional engineering(ICCASCE 2015)

作者： W.Wiratman Najid A.R.Indra Tjahjani Doctoral Program in Civil Engineering UNTAR

County road pavement construction research is a descriptive study will provide a mathematical model and nomogram relationships between the length of road, types of pavement, and % GDP. The research found, firstly, that the independent variable Topography, Population, and accessibility that provide the highest contribution to Development Model Pavement Condition Based Regional District. The independent variable is the sub-criteria of the criteria regional conditions. AHP provides the weighting of criteria: technical criteria weighs approximately 10.0%, weighted criteria, regional conditions and criteria for economic conditions weighs approximately 46.6%, 43.3% respectively. Furthermore, the weighting is used to select the type of pavement using mathematical models. Secondly, the research produces nomogram showing the relationship Long Road to Road Pavement type and% GDP that may used by decision makers in the district in making decisions determining the type of pavement that will be selected based on local conditions.

关键词： Determination of road pavement based on local conditions

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Synthesis of amorphous silica from rice husk ash using the sol–gel method: Effect of alkaline and alkaline concentration

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Materials Today: Proceedings 2023年 87卷 225-229页

作者： Aprilia S. Rosnelly C.M. Zuhra Fitriani F. Haffiz Akbar E. Raqib M. Rahmah K. Amin A. Baity R.A. Department of Chemical Engineering Engineering Faculty Universitas Syiah Kuala Banda Aceh 23111 Indonesia Doctoral Program School of Engineering Post Graduate Program Universitas Syiah Kuala Banda Aceh 23111 Indonesia Mechanical Engineering Department Engineering Faculty University of Abulyatama Lampoh Keude-Aceh Besar Indonesia

In this study, silica extraction from RHA (rice husk ash) has been successfully performed by alkaline using KOH and NaOH with sol–gel precipitation. The silica gel was characterized for the functional group by FTIR, crystallinity with XRD, structure silica with SEM and particle size with PSA. The results show the higher concentration of solvent led to higher silica. The FTIR analysis revealed vibrations of Si[sbnd]O and Si[sbnd]O[sbnd]Si on the product. Additionally, observed to be amorphous and aggregated, the silica extracted from RHA also exhibited a decrease in all samples. © 2023

关键词： Alkaline extraction Concentration of solvent Potassium hydroxide Rice husk ash Silica Sodium hydroxide

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Classification of Multivariate Time Series Signals Using Self-Supervised Representation Learning for Condition Monitoring 30

Classification of Multivariate Time Series Signals Using Sel...

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30th International Symposium on Semiconductor Manufacturing, ISSM 2024

作者： Sumiya, Koichi Arima, Sumika University of Tsukuba Doctoral Program in Policy and Planning Sciences Tsukuba Japan University of Tsukuba Institute of Systems and Information Engineering Tsukuba Japan

ISBN: (纸本)9798331510589

In the analysis of real-world data, two significant challenges often arise: high-dimensional signals and their temporal interactions. To address these issues and identify transitions in process conditions through end-to-end learning, we propose a self-supervised representation learning framework that conceptualizes signals as images. This straightforward approach classifies imaged signals as time-specific conditions by maximizing mutual information within a domain-specific feature space. We applied this methodology to two labeled open datasets and one unlabeled real-world process dataset, yielding promising results. © 2024 IEEE.

关键词： Self-supervised learning

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