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6th International Conference on Informatics and Computing, ICIC 2021

作者： Prayitno, Ragiel Hadi Sudiro, Sunny Arief Madenda, Sarifuddin Gunadarma University Doctoral Program in Information Technology Jakarta Indonesia STMIK Jakarta STIK Electrical Engineering Jakarta Indonesia

ISBN: (纸本)9781665421553

This article describes the AES encryption and decryption process without using lookup tables in the MixColumns transformation. The encryption process consists of transforming subbytes, shiftrows, mixcolumns and addroundkey. The process was carried out for 10 rounds, but in round 10 the mixcolumns transformation was not carried out. The decryption process consists of inverse mixcolumns, inverse shiftrows, inverse subbytes and addroundkey. In this study, the AES encryption and decryption process was carried out using two methods, namely based on the lookup table and without using the lookup table on the MC/IMC transformation. The method in this article is applied to Matlab software. The experimental results show that the encryption and decryption process using a lookup table is slower than the method without a lookup table. The encryption process without a lookup table on the MC transformation takes 0.091 seconds while using a lookup table takes 0.399 seconds. The decryption process without a lookup table on the IMC transformation takes 0.149 seconds while using a lookup table takes 0.206 seconds. © 2021 IEEE.

关键词： Cryptography

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Genome sequence and analysis of Escherichia coli production strain LS5218

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Metabolic engineering Communications 2017年 5卷 78-83页

作者： Rand, Jacqueline M. Gordon, Gina C. Mehrer, Christopher R. Pfleger, Brian F. Department of Chemical and Biological Engineering University of Wisconsin Madison United States Microbiology Doctoral Training Program University of Wisconsin Madison United States

Escherichia coli strain LS5218 is a useful host for the production of fatty acid derived products, but the genetics underlying this utility have not been fully investigated. Here, we report the genome sequence of LS5218 and a list of large mutations and single nucleotide permutations (SNPs) relative to E. coli K-12 strain MG1655. We discuss how genetic differences may affect the physiological differences between LS5218 and MG1655. We find that LS5218 is more closely related to E. coli strain NCM3722 and suspect that small genetic differences between K-12 derived strains may have a significant impact on metabolic engineering efforts. © 2017

关键词： E. coli K-12 Genome sequence Metabolic engineering Polyhydroxyalkanoate

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MAXIMAL ERROR EVALUATION TYPED STABLE MODEL-REFERENCE ADAPTIVE-CONTROL FOR PERIODICALLY LINEAR TIME-VARYING SYSTEMS

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INTERNATIONAL CONF ON SYSTEMS engineering

作者： ITAMIYA, K SHIN, S ANDO, K Doctoral Program in Engineering University of Tsukuba Japan Department of Mathematical Engineering and Information Physics University of Tokyo Japan Institute of Information Sciences and Electronics University of Tsukuba Japan

ISBN: (纸本)0780307348

This paper presents a model reference adaptive control system (MRACS) which does not depend on the degree of the plant when the plant is the continuous-time periodically linear time-varying system. A priori information is only the relative degree and the time-varying period. The controller has adjustable scalar functions. The optimal functions of these are directly estimated synchronizing with the time-varying period of the plant by adaptive laws. The main contribution of this paper is that the computational burden of the adaptive law for the direct function estimation is reduced. It is accomplished with the maximum normalized error evaluation typed adaptive law. The design method and the global stability analysis of the proposed system axe shown. © 1992 IEEE.

关键词： Model reference adaptive control

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Inference and Optimization for engineering and Physical Systems

arXiv

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arXiv 2022年

作者： Krechetov, Mikhail Doctoral Program in Engineering Systems

The central object of this thesis is known under different names in the fields of computer science and statistical mechanics. In computer science, it is called the Maximum Cut problem, one of the famous twenty-one Karp’s original NP-hard problems, while the same object from Physics is called the Ising Spin Glass model. This model of a rich structure often appears as a reduction or reformulation of real-world problems from computer science, physics and engineering. However, solving this model exactly (finding the maximal cut or the ground state) is likely to stay an intractable problem (unless P = NP) and requires the development of ad-hoc heuristics for every particular family of instances. One of the bright and beautiful connections between discrete and continuous optimization is a Semidefinite programming-based rounding scheme for Maximum Cut. This procedure allows us to find a provably near-optimal solution;moreover, this method is conjectured to be the best possible in polynomial time. In the first two chapters of this thesis, we investigate local non-convex heuristics intended to improve the rounding scheme. In the last chapter of this thesis, we make one step further and aim to control the solution of the problem we wanted to solve in previous chapters. We formulate a bi-level optimization problem over the Ising model where we want to tweak the interactions as little as possible so that the ground state of the resulting Ising model satisfies the desired criteria. This kind of problem arises in pandemic modeling. We show that when the interactions are non-negative, our bi-level optimization is solvable in polynomial time using convex programming. Copyright © 2022, The Authors. All rights reserved.

关键词： Ising model

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Reinforcement to concrete bond strength: A comparison between normal concrete and various types of concrete 6

Reinforcement to concrete bond strength: A comparison betwee...

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6th International Conference on Advanced Materials for Better Future, ICAMBF 2021

作者： Rohman, R.K. Kristiawan, S.A. Saifullah, H.A. Basuki, A. Doctoral Degree Program in Civil Engineering Sebelas Maret University Surakarta Indonesia Civil Engineering Department Sebelas Maret University Surakarta Indonesia

This paper describes the bond strength comparison between concrete and reinforcement with several types of concrete. The types of concrete studied were normal concrete (NC), Self-Compacting Concrete (SCC), High-Volume Fly Ash Concrete (HVFAC), and High-Volume Fly Ash Self-Compacting Concrete (HVFA-SCC). Research data were obtained from previous studies. The data of concrete bond strength were obtained by testing the reinforced concrete beam with a lap splice in the tensile moment area. Bond strength values were normalized by dividing with the square root of concrete grade. Then use normalized data to formulate the relationship between the length of lap splice to diameter ratio (ls/db) and the normalized bond strength concrete for both normal concrete and SCC. From the obtained relationship, we can compare the bond strength between NC and SCC. The SCC bond strength is higher than NC. Bond strength of HFVAC and HVFA-SCC is also higher than NC and SCC, so that the use of HVFA-SCC can reduce the need for lap splice. © 2022 Published under licence by IOP Publishing Ltd.

关键词： Self compacting concrete

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Experimental study of CO₂ utilization as a density modification agent for maximizing palm shells and kernels separation efficiency

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South African Journal of Chemical engineering 2022年 42卷 283-289页

作者： Muhammad, Muhammad Marwan, Marwan Munawar, Edi Zaki, Muhammad Doctoral Program School of Engineering Post Graduate Program Universitas Syiah Kuala Banda Aceh 23111 Indonesia Department of Chemical Engineering Faculty of Engineering Universitas Serambi Mekkah Banda Aceh 23245 Indonesia Department of Chemical Engineering Faculty of Engineering Universitas Syiah Kuala Banda Aceh 23111 Indonesia

In palm oil mills (POMs), the CO2 generated from palm oil processing activities is immediately discharged into the atmosphere, increasing greenhouse gases (GHGs) emissions. CO2 utilization can be viewed as a strategy ... 详细信息

In palm oil mills (POMs), the CO₂ generated from palm oil processing activities is immediately discharged into the atmosphere, increasing greenhouse gases (GHGs) emissions. CO₂ utilization can be viewed as a strategy for minimizing GHGs emissions and replacing CaCO₃, frequently used as a density modification agent in the POMs. This research aimed to formulate a novel separation fluid for separating palm shells and kernels by utilizing CO₂ as a density modification agent. Monoethanolamine (MEA) was selected as a chemical absorbent in this study. Chemisorption was applied to ensure that CO₂ was permanently absorbed into the solution. The MEA mass fraction was varied with ratios of 10, 20, 30, 40, and 50 % w/w. Then, the separation efficiency of the palm shells and kernels was measured by adding 15 % w/w of the mixture of palm shells and kernels into the formulated fluid. It was done based on the density difference between palm shells and kernels. The results showed that the optimal separation fluid density ranged between 1.1086 to 1.1777 g/cm³ at an MEA ratio of 30–50% w/w. It corresponds to the maximum separation efficiency of palm shells and kernels, which ranged from 97 to 100 %. This research indicated that CO₂ could be utilized as a density modification agent in the separation fluid. As a result, the formulated fluid was suitable for separating palm shells and kernels while also reducing GHG emissions in POMs by CO₂ utilization. © 2022

关键词： CO2 utilization Density modification agent GHGs emissions Palm shells–kernels separation Separation fluid

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Ant Colony Optimization-Based Path Planning for Autonomous Vehicle Navigation Systems 4

Ant Colony Optimization-Based Path Planning for Autonomous V...

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4th International Conference on Electrical engineering and Computer Science, ICECOS 2024

作者： Sari, Desi Windi Dwijayanti, Suci Suprapto, Bhakti Yudho Universitas Sriwijaya Faculty of Engineering Department of Electrical Engineering Doctoral Program in Engineering Science Palembang Indonesia Universitas Sriwijaya Faculty of Engineering Department of Electrical Engineering Palembang Indonesia

ISBN: (纸本)9798350368253

A crucial aspect of autonomous vehicles is path planning, which involves using various algorithms to determine the most efficient routes. This study investigates the application of the Ant Colony Optimization (ACO) algorithm to create a system for identifying the shortest path. The process includes collecting coordinate data from specific test locations on the Universitas Sriwijaya Indralaya campus to generate a graph-based map for analysis. The study begins with gathering route data through the Google Maps application, which includes 182 routes. In simulation tests, the routes generated by ACO differ from those suggested by Google Maps;sometimes, the ACO route is longer and sometimes shorter, due to the probabilistic nature of the ACO algorithm in finding optimal routes. The average error compared to Google Maps is 11.7 meters. Additional tests introduce obstacles on the road, requiring the system to find alternative routes. For instance, the initial route from the auditorium to the Faculty of Science and Math is 38-39-11-53-110-54-111 with a route length of 670 m. After adding a roadblock in front of the Faculty of engineering, the route changes to 38-39-116-40-70-69-56-111, with a route length of 730 meters. These tests demonstrate that the ACO algorithm effectively identifies the best routes for autonomous vehicles, both under normal conditions and when obstacles are present. © 2024 IEEE.

关键词： Ant colony optimization

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Transcription control engineering and applications in synthetic biology

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Synthetic and Systems Biotechnology 2017年第3期2卷 176-191页

作者： Michael D.Engstrom Brian F.Pfleger Genetics-Biotechnology Center University of Wisconsin-Madison School of Medicine and Public HealthUSA Department of Chemical and Biological Engineering University of Wisconsin-Madison College of EngineeringUSA Microbiology Doctoral Training Program University of Wisconsin-MadisonUSA

In synthetic biology,researchers assemble biological components in new ways to produce systems with practical *** of these practical applications is control of the flow of genetic information(from nucleic acid to protein),*** *** is critical for optimizing protein(and therefore activity)levels and the subsequent levels of metabolites and other cellular *** central dogma of molecular biology posits that information flow commences with transcription,and accordingly,regulatory tools targeting transcription have received the most attention in synthetic *** this mini-review,we highlight many past successes and summarize the lessons learned in developing tools for controlling *** particular,we focus on engineering studies where promoters and transcription terminators(cis-factors)were directly engineered and/or isolated from DNA *** also review several well-characterized transcription regulators(trans-factors),giving examples of how cis-and trans-acting factors have been combined to create digital and analogue switches for regulating transcription in response to various ***,we provide examples of how engineered transcription control systems have been used in metabolic engineering and more complicated genetic *** most of our mini-review focuses on the well-characterized bacterium Escherichia coli,we also provide several examples of the use of transcription control engineering in non-model *** approaches have been applied outside the bacterial kingdom indicating that the lessons learned from bacterial studies may be generalized for other organisms.

关键词： Promoter Transcription Synthetic biology Bacteria Termination Metabolic engineering

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Processing Speed Comparison of the Least Significant Bit (LSB) Steganography Algorithm on FPGA and Matlab 6

Processing Speed Comparison of the Least Significant Bit (LS...

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6th International Conference on Informatics and Computing, ICIC 2021

作者： Yakti, Bayu Kumoro Madenda, Sarifuddin Sudiro, Sunny Arief Musa, Purnamawan Gunadarma University Information Tech. Doctoral Program Jakarta Indonesia STMIK Jakarta STIK Electrical Engineering Jakarta Indonesia

ISBN: (纸本)9781665421553

Digital images are images in digital formats or digital media such as hard drives. Digital images consist of bits (0 or 1) called pixels and have a high capacity for storing data and information. Steganography techniques try to hide the existence of confidential data. The Steganography technique perfectly closes secret messages in carrier images with high level security. Information and data will be manipulated so that it can be detected by human eyes. Least Significant Bit (LSB) is the method used in this study. The embedding and extracting processes in the proposed algorithms are performed using Matlab software and FPGA-based hardware simulation using Xilinx ISE. The purpose of this study is to compare the process speed of the LSB steganography algorithm in the two implementations. The input data on the encryption used is data in binary form and Red Green Blue (RGB) images and output data in stego images. Meanwhile, the input data in the decryption is a stego image and the output data is in the form of binary data. The experimental results showed that the steganography algorithm had been successfully performed on FPGA and Matlab. However, the process on FPGA is faster than the process on Matlab. The result of the encryption process is 696000 times faster than Matlab. Meanwhile, the decryption process is 236000 times faster than Matlab. © 2021 IEEE.

关键词： Steganography

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Determining Critical Links in a Road Network: Vulnerability and Congestion Indicators

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Procedia - Social and Behavioral Sciences 2014年 162卷 158-167页

作者： Eduardo Leal de Oliveira Licínio da Silva Portugal Walter Porto Junior Doctoral student Transportation Engineering Program of COPPE/UFRJ Brazil Professor Transportation Engineering Program of COPPE/UFRJ Brazil

This article focuses on the performance attributes congestion and vulnerability , proposing a conceptual framework based on recent research. We present a case study that allows observing the differences obtained in the ranking of importance of the links of a road network according to each of the two attributes. The differences observed suggest that the exclusive use of congestion indicators to determine performance bottlenecks can lead to misleading solutions.

关键词： congestion vulnerability road network performance indicators.

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