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2nd International Conference on Energy, Environmental and Information System, ICENIS 2017

作者： Sumiyati, Sri Purwanto, P. Sutrisno, Endro Sudarno, S. Arthawidya, Jalu Izzudin, Humam Doctoral Program of Environmental Sciences School of Po. Grad. Diponegoro University Semarang Indonesia Department of Chemical Engineering Faculty of Engineering Diponegoro University Semarang Indonesia Department of Environmental Engineering Faculty of Engineering Diponegoro University Semarang Indonesia

Household wastewater contains contaminants that harm the environment. One of the pollutants found COD. If being discharged into the environment directly, COD concentrations exceeding the existing quality standard will disrupt the ecosystem in the receiving water body. One of the technologies that can degrade COD is biofilm technology with honeycomb tube media. This research aims to analyze the decrease of COD concentration present in wastewater household with biofilm technology of honeycomb media. The reactor used in was made of glass with a thickness of 4 mm, a volume of 18 litres and operated continuously. The media used is made of a PVC pipe, cut to 3 cm in size and then glued to one another, forming a honey comb. The results showed that there has been a decrease in COD concentration of household wastewater. © 2018 The Authors, published by EDP Sciences.

关键词： Biodegradation

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DDPG-Based PID Optimal Controller for Position and Sway Angle of RTGC 23

DDPG-Based PID Optimal Controller for Position and Sway Angl...

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23rd International Conference on Control, Automation and Systems, ICCAS 2023

作者： Bandong, Steven Nazaruddin, Yul Y. Joelianto, Endra Institut Teknologi Bandung Engineering Physics Doctoral Program Faculty of Industrial Technology Bandung40132 Indonesia Instrumentation and Control Research Group Faculty of Industrial Technology Bandung40132 Indonesia

ISBN: (纸本)9788993215274

Increasing global trade requires fast and accurate container transfers by minimizing positional errors and swing angles on the Rubber Tyred Gantry Crane (RTGC) at the container yard causing that the optimization of the controller is a necessity. Currently developing artificial intelligence, namely reinforcement learning based Deep Deterministic Policy Gradient (DDPG) approach, can provide continuous action or output that can be used for controller optimization problems. DDPG can learn from its interactions with the environment, allowing it to identify the best optimal parameter region. This paper proposes DDPG as an PID controller optimizer for position and swing angle of RTGC tested on six episode variations and a trajectory reference. The results garnered from this proposed methodology reveal that the optimal PID parameters perform well across a spectrum of reference trajectories, as well as under varying system parameters such as container masses and rope lengths, as demonstrated by metrics like position and swing angle error, rise time, settling time, and overshoot. © 2023 ICROS.

关键词： Containers

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Investigation of Cylindrical Anode Diameter Influence on Hollow Cathode Operating Characteristics 74

Investigation of Cylindrical Anode Diameter Influence on Hol...

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74th International Astronautical Congress, IAC 2023

作者： Hsieh, Jordan H. Huang, Yi-Lung Huang, Ping-Han Wang, Wei-Cheng Li, Yueh-Heng Department of Aeronautics and Astronautics National Cheng Kung University Tainan70101 Taiwan International Doctoral Degree Program on Energy Engineering National Cheng Kung University Tainan70101 Taiwan

This research delves into the effects of cylindrical anode dimensions on the steady-state discharge of open-ended heaterless hollow cathodes. The study assessed anode diameters of 38 mm, 74 mm, and 102 mm. Challenges arose when utilizing the 102 mm diameter anode in diode mode, with a suspected divergent electric field stemming from the anode's size and closeness hindering consistent discharge between the cathode and anode. The cathode was set to operate in triode mode with the keeper adjusted to a discharge current of 1.2 A to navigate this impediment, ensuring the axial electric field's adequacy. In contrast, tests with 74 mm and 38 mm anodes were conducted in diode mode, with the keepers kept unpowered. Analysis of the I-V curves underscored a typical negative resistance in the cathode discharge, a phenomenon attributable to the diminishing emitter sheath voltage with elevating electron energy flux and emitter surface temperatures. A pronounced inverse correlation between the steady-state discharge current and gas flow rate was also discerned, connected to rising emitter temperatures and enhanced plasma drift resistance in the keeper orifice. Notably, anode diameter emerged as a determinant of current leakage, with the 74 mm anode presenting a reduced discharge voltage compared to the 38 mm due to augmented current leakage. Conversely, the 102 mm anode demanded a higher voltage, a requirement linked to its attenuated axial electric field, compelling a rise in voltage for a sufficient current draw to the anode power supply. These discoveries furnish understanding for refining open-ended heaterless hollow cathode designs and pave the way for subsequent inquiries into cathode plumes. Copyright © 2023 by the International Astronautical Federation (IAF). All rights reserved.

关键词： Anode Cathode Diameter Geometry Heaterless

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Implementation of Multi-process Automatic Loading and Unloading Production System

Implementation of Multi-process Automatic Loading and Unload...

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2023 International Conference on Consumer Electronics - Taiwan, ICCE-Taiwan 2023

作者： Tung, Li-Chiuan Chen, Shu-Hung Ye, Yu-Cheng Liu, Guan-Zhi Chen, Lin-Yin Tu, Yu-Rou Lai, Yen-Wen Lee, Jeng-Dao National Formosa University Department of Automation Engineering Yunlin Taiwan Ming Chuan University Department of Electronic Engineering Taoyuan City Taiwan National Yunlin University of Science and Technology Doctoral Program in Industrial Engineering and Management Yunlin Taiwan

ISBN: (纸本)9798350324174

This research develops an intelligent automatic production loading and unloading solution for a multi-process part. According to the posture required for each processing operation of each part, a novel gripper and carrier that can implement multi-position clamping are designed. The Beckhoff controller is adopted as the host controller in the control system to integrate the robotic arm (including the vision system), the automated guided vehicle (AGV), and the computer numerical control (CNC) machine. The main topic of this research is to meet the requirements of automatic loading and unloading in the processing of the entire production line. It will significantly reduce the workforce consumption of the processing production line and avoid human error, thereby improving processing reproducibility and product production stability. © 2023 IEEE.

关键词： Controllers

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Performance Evaluation of Coverage Prediction in 4G Networks Using Machine Learning Classification Algorithm 10

Performance Evaluation of Coverage Prediction in 4G Networks...

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10th International Conference on Wireless and Telematics, ICWT 2024

作者： Yuliana, Hajiar Iskandar Hendrawan Ridwan, Azwar Mudzakkir Charisma, Atik Somantri, Nivika Tiffany Universitas Jenderal Achmad Yani Faculty of Engineering Department of Electrical Engineering Indonesia Institut Teknologi Bandung Doctoral Program of School of Elecrtical Engineering and Informatics Indonesia Bandung Indonesia UIN Sunan Gunung Djati Bandung Department of Electrical Engineering Indonesia

ISBN: (纸本)9798350377057

Network coverage prediction is an important aspect of 4G network planning and optimization. In this study, we conducted a comprehensive analysis of the performance of various machine learning algorithms in predicting 4G network coverage. The data collected includes information on location, signal intensity, topography, and other important variables. Data pre-processing is performed to clean, normalize, and select relevant features. Next, we compared the performance of several machine learning algorithms, including Logistic Regression, KNN, Naïve Bayes, Decision Tree, SVM, XGBoost, AdaBoost, and Bayesian Network Classifier. The model training process is performed using subsets of training, validation, and testing data, with evaluation performed using various evaluation metrics such as accuracy, precision, recall, F1-score, RMSE, MAE, and R-squared. The experimental results show that Random Forest stands out with excellent performance, while Naïve Bayes tends to produce lower performance. The conclusion of this study provides valuable insights into the potential applications of machine learning algorithms in predicting 4G network coverage with accuracy and reliability. © 2024 IEEE.

关键词： Adversarial machine learning

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Quantitative EEG Analysis Based on PSD and eLORETA-Source Localization Approach in Spatial Auditory Process 8

Quantitative EEG Analysis Based on PSD and eLORETA-Source Lo...

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8th International Conference on Instrumentation, Control, and Automation, ICA 2023

作者： Masitoh, Masitoh Suprijanto, Suprijanto Joko Sarwono, R.S. Institut Teknologi Bandung Doctoral Program of Engineering Physics Bandung Indonesia Institut Teknologi Bandung Instrumentation and Control Research Group Bandung Indonesia Institut Teknologi Bandung Engineering Physics Research Group Bandung Indonesia

ISBN: (纸本)9798350301274

The advancement of spatial audio technology has been driven by the human capacity for spatial auditory, enabling immersive auditory experiences that replicate real-life sound environments. Understanding how the brain encodes spatial auditory processes has emerged as a growing area of research. Electroencephalography (EEG), a non-invasive modality with high temporal resolution, offers an ideal means to study brain responses to moving sound stimuli. This study aims to compare quantitative EEG methods derived from direct EEG recordings, focusing on EEG temporal features such as Power Spectral Density (PSD), as well as EEG source localization using eLORETA. Two types of audio stimuli, stereo audio and spatial audio, delivered through headsets attached directly to both ears, were investigated. When exposed to the spatial audio stimulus, there was a notable increase in the mean PSD within the Theta, Alpha, and Beta frequency bands in the auditory cortex (channel T3, T4, T5, and T6). The most significant increase was observed in the Beta frequency band of 145.601 μV2/Hz in T4, indicating heightened focus experienced by the subjects compared to the stereo audio stimulus. Furthermore, EEG source localization using eLORETA revealed distinct activation in the frontal area during the second experiment involving the spatial audio stimulus. Specifically, there was a significant increase (p>0.05) in current density within the frontal regions of the brain, including Brodmann Area (BA) 6 and 9, which are associated with selective attention and spatial orientation. These findings highlight the practicality of the employed methods and their potential to shed light on brain activity during spatial auditory processes. © 2023 IEEE.

关键词： Electroencephalography

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Transplantation of human kidney organoids elicited a robust allogeneic response in a humanized mouse model

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Kidney International 2025年第6期107卷 1011-1016页

作者： Mon-Wei Yu, Samuel Choi, John Yongjoon Kady, Jamie De Cos, Marina Wong, Jenny S. King, Emily Younis, Nour Al Rahy, Nadim Al Chaar, Soltan Djebli, Houda Eskandari, Siawosh Samuel, Stephen Merhej, Tamara Sukumar, Nivedha Lin, Jia-Ren Chen, Jia-Yun Xu, Yilin Santagata, Sandro Weins, Astrid Yeung, Melissa Cravedi, Paolo Campbell, Kirk N. Lemos, Dario Bonventre, Joseph V. Brehm, Michael A. Azzi, Jamil Department of Medicine Nephrology Division Mount Sinai Hospital New York NY United States Department of Medicine Renal Division Brigham and Women's Hospital Harvard Medical School Boston MA United States Program in Molecular Medicine Diabetes Center of Excellence University of Massachusetts Chan Medical School Worcester MA United States Doctoral School of Science and Technology Lebanese University Beirut Lebanon Institute of Biological Science Faculty of Medical Sciences Mohammed VI Polytechnic University Benguerir Morocco Department of Biotechnology Northeastern University Boston MA United States Department of Systems Biology Harvard Medical School Boston MA United States Department of Pathology Brigham and Women's Hospital Harvard Medical School Boston MA United States Harvard Stem Cell Institute Cambridge MA United States Department of Medicine Division of Engineering in Medicine Brigham and Women's Hospital Harvard Medical School Boston MA United States

Human kidney organoids derived from embryonic stem cells (ESCs) or induced pluripotent stem cells (iPSCs) have become novel tools for studying various kidney pathologies. Here, we transplanted ESC-derived kidney organoids into humanized mice with a mature human adaptive immune system developed through thymic education. As judged by histology and immunophenotyping, the transplanted HLA-mismatched kidney organoids trigged a robust alloimmune response, characterized by a dense immune cell infiltrate and enhanced memory T cell phenotype in the allograft 30 days post-transplantation. Multiplexed immunofluorescence revealed expression of functional markers of various immune cell infiltrates in response to organoid allografts, mimicking the T cell-mediated rejection process in humans. This validated our model as a novel platform to study various therapeutic strategies to control alloimmunity. Splenocytes isolated from organoid-transplanted hosts showed an alloantigen-specific memory response against 2D kidney organoids ex vivo. Overall, our study indicates that transplanting kidney organoids in humanized mice may be a valuable tool for studying human allogeneic immunity. © 2025 International Society of Nephrology

关键词： human kidney organoids humanized mice model kidney transplantation

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High embedding reversible data hiding scheme for JPEG

High embedding reversible data hiding scheme for JPEG

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6th International Conference on Intelligent Information Hiding and Multimedia Signal Processing, IIHMSP 2010

作者： Kuo, Wen-Chung Kuo, Shao-Hung Wuu, Lih-Chyau Depart. of Computer Science and Information Engineering National Formusa University Yunlin 632 Taiwan Graduate School of Engineering Science Technology Doctoral Program National YunLin University of Science and Technology Yunlin 640 Taiwan

ISBN: (纸本)9780769542225

Both Data hiding and data compression are very important technologies in the field of image processing. It seems that there is no relationship between data hiding and data compression because most of the data hiding mechanisms focus on information security and the data compression mechanisms emphasize the compression ratio. In fact, they are closely related. Until now, there are many literatures to discuss the secret data how to be embedded into the media image. Unfortunately, the stego-image's size will be increased when the media image is hidden a lot of secret data. In order to overcome this disadvantage, a reversible data hiding scheme based on EMD data hiding and JPEG compression technology will be proposed in this paper. According to the experimental results, we can prove that our proposed scheme still keeps high embedding capacity, security and good compression ratio. © 2010 IEEE.

关键词： Steganography

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The Effect of Quality of Service Towards the Implementation of Trajectory Hard Handover on Mobile Cellular

The Effect of Quality of Service Towards the Implementation ...

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2022 International Conference on Electrical engineering and Informatics, ICELTICs 2022

作者： Murhaban Syahrial Arif, Teuku Yuliar Arnia, Fitri Universitas Syiah Kuala Doctoral Program School of Engineering Banda Aceh Indonesia Universitas Teuku Umar Departement Information Technology Engineering Aceh Barat Indonesia Universitas Syiah Kuala Departement Information Technology Engineering Banda Aceh Indonesia

ISBN: (数字)9781665487665

ISBN: (纸本)9781665487665

Wireless network communication, particularly when user equipment conducts its mobility and maintains its connection in order to stay alert when automatically switching service among base stations, needs a handover method that guarantees the communication is stable with no disturbance from the distance of the base station and the speed of the user equipment. The convenience of communication during handover depends on the quality of service that provides the level of different services in arranging and giving traffic priority in the network. This research is designed using a one-way trajectory with eight base stations and speed variations of 45 km/hour, 60km/hour, and a distance of the base station of 7 km. The effects of hard handover with the performance of RRSI and RSRP against the parameter performance of service quality with the service of voice over internet protocol when entering the critical signal area and must conduct handover with the constant speed that analyzed based on telecommunication reference and internet protocol harmonization over networks. Simulation using optimized network engineering tools modeler educational. The result of a test that was carried out using the hard handover for voice-over-internet application, obtained a better averagejitter result for a speed of 45 km/hour compared to a speed of 65 km/hour. The average delay for 45 km/h is 11.5 ms and for 60 km/h is 11 ms. While the throughput for speeds of 45 km/h and 60 km/h with a value of 190-198 Kbps with a low index that throughput does no effect on the application used. © 2022 IEEE.

关键词： Base stations

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Analysis of Temiki (Melastoma Candidum) Extract Compounds as Corrosion Inhibitors Using GC–MS 4th

Analysis of Temiki (Melastoma Candidum) Extract Compounds as...

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4th International Conference on Experimental and Computational Mechanics in engineering, ICECME 2022

作者： Supardi, Joli Rizal, Samsul Ali, Nurdin Fonna, Syarizal Ikramullah, Ikramullah Arifin, A.K. Doctoral Program School of Engineering Post Graduate Program Syiah Kuala University Banda Aceh23111 Indonesia Department of Mechanical Engineering Teuku Umar University Meulaboh23615 Indonesia Department of Mechanical and Industrial Engineering Syiah Kuala University Banda Aceh23111 Indonesia Department of Mechanical and Materials Engineering Universiti Kebangsaan Malaysia Selangor DE Bangi43600 Malaysia

ISBN: (纸本)9789819974948

Temiki (Melastoma Candidum) is one of the unutilized wild plants observed to be turning pests on plantations. It has only been used for medicine and not for engineering purposes. Therefore, this study aims to identify and analyze Temiki’s chemical compounds, which are useful as corrosion inhibitors. The plant was washed, dried, then blended until it became a fine powder, and was further extracted by employing the maceration method with ethanol as solvent. The extracted compounds were also analyzed using Gas Chromatography-Mass Spectrophotometry (GC–MS) and the results obtained include, 2-Furancarboxaldehyde (CAS) Furfural, 1,2,3-Propanetriol (CAS) Glycerol, Acetic acid,1-(2-methyltetrazole-5-yl) etheny, 4H-Pyran-4one,2,3-dihydro-3,5-dihydroxy, 5-Hydroxymethylfurfural, cis-dimethylmorpholine, 3-penten-1-ol,2,2,4-trimethyl-(CAS)2,2,4, 2-AMINO-9-(3,4-DIHYDROXY-5-HYDORO, D-Allose, beta-D-Glucopyranoside, methyl, Hexadecanoic acid, methyl ester, 9,12,15-Octadecatrienoic acid, methyl ester. In conclusion, these chemical compounds were useful as corrosion inhibitors. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2024.

关键词： Corrosion

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