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Selectivity of CO_(2)reduction reaction to CO on the graphitic edge active sites of Fe-single-atom and dual-atom catalysts:A combined DFT and microkinetic modeling

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Carbon Resources Conversion 2024年第1期7卷 21-31页

作者： Ahmad Nuruddin Adhitya Gandaryus Saputro Arifin Luthfi Maulana Febdian Rusydi Fiki Taufik Akbar Hadi Teguh Yudistira Hermawan Kresno Dipojono Advanced Functional Materials Research Group Faculty of Industrial TechnologyInstitut Teknologi BandungJl.Ganesha No.10Bandung 40132Indonesia Research Center for Nanosciences and Nanotechnology Institut Teknologi BandungJl.Ganesha No.10Bandung 40132Indonesia Research Center for Quantum Engineering Design Department of PhysicsFaculty of Science and TechnologyUniversitas AirlanggaSurabaya 60115Indonesia Theoretical High Energy Physics Research Division Faculty of Mathematics and Natural SciencesInstitut Teknologi BandungJl.Ganesha No.10Bandung 40132Indonesia Mechanical Engineering Study Program Institut Teknologi Sumatera(ITERA)South LampungLampungIndonesia Department of Materials Science and Engineering University of CaliforniaBerkeleyBerkeleyCA 94720United States

We study the carbon dioxide reduction reaction(CO_(2)RR)activity and selectivity of Fe single-atom catalyst(Fe-SAC)and Fe dual-atom catalyst(Fe-DAC)active sites at the interior of graphene and the edges of graphitic nanopore by using a combination of DFT calculations and microkinetic *** trend of limiting potentials for CO_(2)RR to produce CO can be described by using either the adsorption energy of COOH,CO,or their ***_(2)RR process with reasonable reaction rates can be achieved only on the active site configurations with weak tendencies toward CO *** efficiency of CO_(2)RR on a catalyst depends on its ability to suppress the parasitic hydrogen evolution reaction(HER),which is directly related to the behavior of H adsorption on the catalyst’s active *** find that the edges of the graphitic nanopore can act as potential adsorption sites for an H atom,and in some cases,the edge site can bind the H atom much stronger than the main Fe *** linear scaling between CO and H adsorptions is broken if this condition is *** condition also allows some edge active site configurations to have their CO_(2)RR limiting potential lower than the HER process favoring CO production over H2 production.

关键词： CO_(2)RR FexNy active site Fe-SAC Fe-DAC Graphitic edges DFT Microkinetic

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Machine Learning-Based Prediction of Corrosion Inhibition Efficiency of Expired Pharmaceuticals: Model Development and Application

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Journal of Bio- and Tribo-Corrosion 2025年第1期11卷 1-12页

作者： Putra, Dzaki Asari Surya Ardyansyah, Nibras Bahy Putranto, Nicholaus Verdhy Trisnapradika, Gustina Alfa Akrom, Muhamad Rustad, Supriadi Dipojono, Hermawan Kresno Maezono, Ryo Faculty of Computer Science Study Program in Informatics Engineering Universitas Dian Nuswantoro Semarang50131 Indonesia Research Center for Materials Informatics Faculty of Computer Science Universitas Dian Nuswantoro Semarang50131 Indonesia Quantum and Nano Technologies Research Group Faculty of Industrial Technology Institut Teknologi Bandung Bandung40132 Indonesia School of Information Science Japan Advanced Institute of Science and Technology Ishikawa923-1292 Japan

Corrosion poses a significant challenge in industries due to material degradation and high maintenance costs, making effective inhibitors essential. Recent studies suggest expired pharmaceuticals as alternative corrosion inhibitors, but identifying the most efficient compounds can be time-consuming. This study applies machine learning models, particularly Gradient Boosting Regressor (GBR), to predict corrosion inhibition efficiency (CIE). The developed model is integrated into a web-based application, enabling real-time, accurate CIE predictions. Results show GBR as the more precise model for predicting CIE, with low error rates. The streamlit-based web application offers a user-friendly platform, facilitating quick identification of suitable inhibitors. It is flexible, supporting analysis beyond corrosion inhibitors, and significantly enhances the efficiency of the evaluation process. © The Author(s), under exclusive licence to Springer Nature Switzerland AG 2025.

关键词： Adversarial machine learning

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Achievement of green campus indications based on assessment indicators on H-BAT program Universitas Negeri Semarang 9

Achievement of green campus indications based on assessment ...

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9th engineering International Conference, EIC 2020

作者： Prihanto, T. Fathoni, K. Prasetiyo, B. Study Program of Architecture Faculty of Engineering Universitas Negeri Semarang Indonesia Study Program of Electrical Engineering Faculty of Engineering Universitas Negeri Semarang Indonesia Study Program of Informatics Universitas Negeri Semarang Indonesia

Universitas Negeri Semarang (UNNES) has a spirit to become a Conservation and International Reputation University is realized through strategic missions. One of the conservation-oriented implementation programs is H-BAT (Green, Clean and Healthy) program. In its implementation, there is a problem, namely the achievement of H-BAT program has not been maximized during the last 3 years in assessment. The objectives of this research are: (1) to identify of the potential and character of environmental support in the work units;(2) to determine the achievement of the indication of a green campus based on the assessment indicators on H-BAT program. This research was carried out in four stages: (1) Data collection;(2) Spatial data processing;(3) Non Spatial data processing;(4) Analysis (ecological, technical standards);The results achieved in June 2020 are as follows: FT got 87,50%, FE got 85,87%, FMIPA got 81,52%, BUHK got79,49%, FIP got 73,91%, LP3 got 69,23%, LP2M got 63,46%, FIS got 60,33%,PPS got 57,07%, FIK got 56,52%, FH got 52,72%, FBS got 49,46%, TIK got 40,38%, BPB got 34,62%, Library got 30,13%, Archive got 17,31%. From these results, it can be seen that there is a lack of maximum achievement due to, among others, the lack of guidance and technical assistance in the management of the unit. So it is necessary to complete governance guidelines and technical assistance that are more intensive in unit governance to achieve the goals of UNNES as a green campus. © Published under licence by IOP Publishing Ltd.

关键词： Data handling

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A Novel RBF-DDM Method for Modelling Transient Droplet Spreading in Simple Oil Shear Flow

SSRN

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SSRN 2024年

作者： Septiyanto, Muhamad Dwi Budiana, Eko Prasetya Hadi, Syamsul Faculty of Engineering Universitas Sebelas Maret Surakarta Indonesia Master Program of Mechanical Engineering Faculty of Engineering Universiitas Sebelas Maret Surakarta Indonesia

This current numerical model of droplet spreading in a simple oil shear flow is assessed using a hybrid combination of the radial basis function (RBF) and domain decomposition method (DDM). The complex interfacial interaction understanding of oil-water is challenging to consider appropriately with the RBF-DDM numerical solution. The governing equations, which consist of the Navier-Stokes equation in primitive variable form, the Cahn-Hilliard equation, and the Poisson equation, are solved using the Radial Basis Function (RBF) method for spatial derivatives and the forward Euler method for temporal derivatives. This combination of RBF and DDM successfully addressed the complex domain multiphase interaction, with the dense matrix solved in several subdomains. The capillary number (Ca) and initial oil velocity are two non-dimensionalization variables analyzed, with the deformation coefficient serving as the primary dependent variable. The findings reveal that both variables affect the deformation coefficient presented with the deformation based on non-dimensionalization time. As theoretically stated, the interfacial tension is inversely proportional to the Ca, meaning that a possibly high Ca leads to a higher deformation coefficient. To get accurate elaboration, the convergence analysis and statistical model analysis use root mean square divergence (RMSDIV) and root mean square error (RMSE), respectively. © 2024, The Authors. All rights reserved.

关键词： Navier Stokes equations

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TECTONIC GEOMORPHOLOGY ANALYSIS OF THE EAST LEMBANG FAULT SYSTEM IN THE UJUNG BERUNG AND JATINANGOR AREA, WEST JAVA, INDONESIA 44

TECTONIC GEOMORPHOLOGY ANALYSIS OF THE EAST LEMBANG FAULT SY...

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44th Asian Conference on Remote Sensing, ACRS 2023

作者： Sulastri, Murni Sadisun, Imam A. Sulaksana, Nana Sukrisyanti Rendra, Pradnya Paramarta Raditya Wahyuni, Sri Geological Technology Study Program Mining Energy Polytechnic Bandung Bandung Indonesia Indonesia Indonesia Faculty of Geological Engineering Universitas Padjadjaran Bandung Indonesia Bandung Indonesia

ISBN: (纸本)9781713893646

Lembang fault is an active fault that may trigger earthquakes and landslides in the North Bandung area. The movement of the fault is on the mainland, theLembang fult is still being debated even though an earthquake has been recorded which may have originated from this fault. The epicenter in the Cihideung area, in addition to tectonic influences, the activity of the Lembang fault is also thought to be influenced by volcanism which can affect the mechanism of fault movement. Tectonic processes play an essential role in the formation of the morphology of an area. The Lembang fault is a normal fault that was formed as a result of tectonic activity in the Neogene sge, located in the northern part of Bandung, stretching for 30 km in a west-east direction, the existence of this fault has shaped the morphology of the Lembang plains to the north and forms a hilly path trending west-east to the north. South. Tectonic geomorphology is the main factor that controls the development of landforms in active tectonic areas and have a significant influence on the natural features of mountains and watersheds which are located east of the Lembang fault, Cikapundung, and Cikeruh. Trending northwest-southeast geomorphic indication analysis is used to study tectonic activity in the study area in the form of basin shape (Bs), watersheds gradient index (SL), drainage basin asymmetry (Af), mountain face sinuosity (SMF) and valley floor width to valley height ratio (Vf). These geomorphic indication variables are combined to produce degrees of relative tectonic activity in the research area which can be divided into four classes;class 1 has a very high relative tectonic activity index, class 2 has a relatively high tectonic activity index, class 3 has a relatively moderate tectonic activity index, and class 4 has a relatively low tectonic activity index, field observation data in the form of the landform and geology of the research area support these results. © 2023 ACRS. All Rights Reserved.

关键词： Geomorphic Indication Lembang Fault Tectonic Geomorphology

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Epilithic biofilm as a potential biomonitor for microplastics contamination in Brantas River of Malang City, Indonesia

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Case Studies in Chemical and Environmental engineering 2025年 11卷

作者： Anggayasti, Wresti L. Pramudia, Zulkisam Susanti, Yogita A.D. Al Zamzami, Ilham Misbakudin Moehammad, Khibar Syiar Wardana, I Nyoman Gede Kurniawan, Andi Environmental Sciences Study Program of Universitas Brawijaya Malang Indonesia Aquaculture Study Program Faculty of Fisheries and Marine Science Universitas Brawijaya Malang Indonesia Aquatic Resources Management Study Program Faculty of Fisheries and Marine Science Universitas Brawijaya Malang Indonesia Mechanical Engineering Department Faculty of Engineering Universitas Brawijaya Malang Indonesia

Despite being an efficient bioremediation agent, aquatic biofilm's usefulness as a biomonitor has not been explored extensively. This study disclosed the potential of epilithic biofilm as biomonitor by comparing its metagenomics with water quality parameters and microplastic count in Brantas River. Metagenomics showed the epilithic biofilm was dominated by Exiguobacterium, which recognizes and degrades microplastics, along with Rhodobacterium and Rhizobiales. For the first time, biofilm microbes and their respective roles were discovered to correspond to the total microplastic counts in comparison with BOD as the only transgressing physicochemical parameter. Thus, epilithic biofilm is a potential biomonitor for riverine microplastic contaminations. © 2024 The Author(s)

关键词： Epilithic biofilm Metagenomics Microplastic biomonitor River pollution Water physicochemical parameters

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Self-loop Laplacian Formation Control for Linear Systems

Self-loop Laplacian Formation Control for Linear Systems

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Computer Sciences, engineering, and Technology Innovation (ICoCSETI), International Conference on

作者： Ashton Bradley Hendrawan Djati Wibowo Djamari Ignatius Pulung Nurprasetio Harry Septanto Mechanical Engineering Study Program Sampoerna University Jakarta Indonesia Faculty of Mechanical and Aerospace Engineering Institut Teknologi Bandung Bandung Indonesia Research Center for Smart Mechatronics National Agency for Research and Innovation (BRIN) Bogor Indonesia

ISBN: (数字)9798331508616

ISBN: (纸本)9798331508623

This study works on scalable formation control of general linear system agents which based on self-loop Laplacian method. Self-loop Laplacian method for scalable formation is used when it is desired that the initial states of agents and communication topology of agents affects the formation size directly. Proof is provided demonstrating that the self-loop Laplacian matrix shares spectral properties with the standard Laplacian matrix, and the two can be related through a transformation matrix. Existing works on scalable formation mostly focused on single and double integrator agents, particularly where the control input algorithm uses self-loop Laplacian matrix. Extending the work on self-loop Laplacian matrix, this study proposes a control input algorithm for agents in linear system dynamics. The algorithm uses both self-loop Laplacian formulation and general linear system consensus methods, and the stability of the whole system is proven using Lyapunov direct method. Two numerical examples with 4 and 5 agents are shown to verify the result.

关键词： Linear systems Technological innovation Laplace equations Heuristic algorithms Formation control Topology Collision avoidance Standards Numerical stability Multi-agent systems

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Integer programming Approaches to an Issue of Scheduling for a Truck-Drone Last-Mile Delivery System with Parcel Pickup Service 13

Integer Programming Approaches to an Issue of Scheduling for...

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Joint 13th International Conference on Soft Computing and Intelligent Systems and 25th International Symposium on Advanced Intelligent Systems, SCIS and ISIS 2024

作者： Yamada, Kotaro Karuno, Yoshiyuki Iima, Hitoshi Graduate School of Science and Technology Kyoto Institute of Technology Mechanodesign Program Kyoto Japan Kyoto Institute of Technology Faculty of Mechanical Engineering Kyoto Japan Kyoto Institute of Technology Faculty of Information and Human Sciences Kyoto Japan

ISBN: (纸本)9798350373332

In this paper, we consider a scheduling issue for parcel delivery and pickup services by a truck-drone last-mile delivery system. We are given a single carrier truck and multiple identical drones to serve a finite set of customers. The single carrier truck plays the role of a mobile depot for the drones, and it visits several stops in a given order of them. The given order of stops constitutes a fixed truck route, and the carrier truck is allowed to launch (resp., to retrieve) a drone to (resp., from) a customer at a stop. For each sortie of a drone, the launching stop and the retrieving stop must be the same. The load capacity of a drone is limited to one, and for a sortie of a drone at a stop, there are three options: (i) only deliver a parcel to a customer, (ii) only pick up a parcel from a customer, and (iii) deliver a parcel to a customer, and then pick up a parcel from a customer. The scheduling problem asks to find an assignment of customers to drones with sortie options and a choice of a truck stop for each sortie in the assignment. The objective is to minimize the total duration of the carrier truck over all the stops, which is equivalent to minimizing the makespan. In this paper, we first propose an extended integer program for the case with both delivery and pickup services from an existing one for the case with delivery service only. We also conduct numerical experiments to demonstrate the solution quality of the proposed integer program by utilizing an integer programming solver, and report the results. © 2024 IEEE.

关键词： Integer programming

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Effect of chemical composition and microstructure on the thermal conductivity of Mg-Al-Ca alloys

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Keikinzoku/Journal of Japan Institute of Light Metals 2024年第1期74卷 9-13页

作者： Kirimoto, Yuichi Kondo, Natsuki Ito, Mizuki Tsukeda, Tadayoshi Aida, Tetsuo Tabata, Hironobu Kurihara, Hideki Suzuki, Mayumi Department of Nano and Functional Material Science Graduate School of Science and Engineering for Education University of Toyama 3190 Gofuku Toyama-shi Toyama930-8555 Japan School of Sustainable Design Materials and Engineering University of Toyama Toyama-shi Toyama Japan Program of Materials Science and Engineering Studies in Science and Engineering Graduate School of Science and Engineering University of Toyama Toyama-shi Toyama Japan Faculty of Sustainable Design Academic Assembly University of Toyama Toyama-shi Toyama Japan CHUETSU METAL WORKS CO. LTD. Nakaniikawa-gun Toyama Japan Saitama Industrial Technology Center Kawaguchi-shi Saitama Japan Department of Mechanical Systems Engineering Faculty of Engineering Toyama Prefectural University Imizu-shi Toyama Japan

In recent years, the increasing demand for electric vehicles, digital devices such as PCs and smartphones, and renewable energy storage systems has created a need for higher-performance batteries. Accordingly, the thermal conductivity of the case that houses the battery is becoming increasingly important. In this study, compositions with high thermal conductivity and good castability were investigated, focusing on Mg-Al-Ca alloys, and the relationship between the two was examined through thermal conductivity measurements and microstructural observations. As a result, the Mg-6%Al-4%Ca alloy was optimal in terms of castability and thermal conductivity. It was confirmed that a lower Al solid solution capacity and a higher purity of the matrix phase are important to improve the thermal conductivity. It is also suggested that the second phase, platelet Al2Ca, is likely to be recognized and enriched in the matrix, contributing to the improvement of thermal conductivity. The amount of Ca solid solution in the matrix was suggested to be reduced by the enrichment of Al in the matrix. The Ca solid solution in the matrix was found to be less effective in reducing thermal conductivity than the Al solid solution. © 2024 The Japan Institute of Light Metals.

关键词： Magnesium alloys

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Project Edubot: Exploring Pedagogical Approaches in High School Robotics Education

Project Edubot: Exploring Pedagogical Approaches in High Sch...

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2024 Brazilian Symposium on Robotics (SBR), and 2024 Workshop on Robotics in Education (WRE)

作者： Isabela Nunes Daltro João Victor Silva Santos Guilherme Barbosa De Sousa Rodrigo Martins M. A. Pastrana Roberto De Souza Baptista Mechatronics Engineering Undergraduate Program Department of Mechanical Engineering Mechatronics Graduate Program Faculty of Gama Electronics Engineering Undergraduate Program University of Brasilia Brasilia DF Brazil

ISBN: (数字)9798350391084

ISBN: (纸本)9798350391091

This study focus on passive and active learning within the context of robotics education on public high schools. By synthesizing research findings and practical insights, this paper offers valuable recommendations for educators aiming to optimize the delivery of robotics education in public high schools, addressing the significance of the utilization of appropriate resources and technologies to support effective instruction. We implemented two distinct teaching methodologies to compare and study students' reactions and learning outcomes: Group A experienced a passive methodology, while Group B engaged with an active methodology. We conducted a survey and the results show that the majority of the students prefer the active approach used in classes.

关键词： Surveys Conferences Education Active learning Collaboration Problem-solving Robots Creativity

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