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2nd International Conference on Experimental and Computational Mechanics in engineering, ICECME 2020

作者： Raynaldo, Kevin Andrianto, Richie Darmawan, Steven Study Program of Mechanical Engineering Faculty of Engineering Universitas Tarumanagara Jalan Letjen S. Parman No. 1 Jakarta Barat11440 Indonesia

ISBN: (纸本)9789811607356

Indonesia has lots of natural resources especially in marine sector such as yellowstripe scad and long-jawed mackerel. Those fish are usually dried by fisherman for longer storage using conventional drying by heat from the sun. This conventional drying method takes hours, about two or three days depends on sun heat intensity. Based on that problem, mechanical drying system may overcome the problem. Automatic fish dryer is designed to dry the fish effectively with even heat distribution with palette rotation system which is hoped to increase productivity and economic potential for coastal communities. The prototype is designed theoretically with mechanical design to generate part specification including heater, shaft, electric motor, bearing, pulley and transmission. CFD method to discover the heat distribution inside with 5,239 nodes and STD k-Ε turbulence model. A 400 mm × 500 mm × 420 mm prototype is generated to dry 2 kg of long-jawed mackerels in 5.3 h with 0.00419 g/s for drying mass flow rate from 70 to 30% water content. CFD simulation shows the exhaust fan need to be installed at outlet for better water-vapor flow distribution. This research indicates that automatic fish dryer can dry 4 times faster than conventional drying system. © 2021, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： CFD Fish dryer Mechanical design Prototype

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Comprehensive Analysis and Remediation of Insecure Direct Object References (IDOR) Vulnerabilities in Android APIs 1

Comprehensive Analysis and Remediation of Insecure Direct Ob...

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1st IEEE International Conference on Cryptography, informatics, and Cybersecurity, ICoCICs 2023

作者： Yulianto, Semi Abdullah, Roni Reza Soewito, Benfano Bina Nusantara University Binus Graduate Program Computer Science Computer Science Department Jakarta11480 Indonesia National Institute of Science and Technology Faculty of Informatics Engineering Jakarta12630 Indonesia Bina Nusantara University Binus Graduate Program. Master of Computer Science Computer Science Department Jakarta11480 Indonesia

ISBN: (纸本)9798350339437

The escalating visibility of secure direct object reference (IDOR) vulnerabilities in API security, as indicated in the compilation of OWASP Top 10 API Security Risks, highlights a noteworthy peril to sensitive data. This study explores IDOR vulnerabilities found within Android APIs, intending to clarify their inception while evaluating their implications for application security. This study combined the qualitative and quantitative approaches. Insights were obtained from an actual penetration test on an Android app into the primary reasons for IDOR vulnerabilities, underscoring insufficient input validation and weak authorization methods. We stress the frequent occurrence of IDOR vulnerabilities in the OWASP Top 10 API vulnerability list, highlighting the necessity to prioritize them in security evaluations. There are mitigation recommendations available for developers, which recognize its limitations involving a possibly small and homogeneous selection of tested Android applications, the testing environment that could cause some inaccuracies, and the impact of time constraints. Additionally, the study noted insufficient threat modeling and root cause analysis, affecting its generalizability and real-world relevance. However, comprehending and controlling IDOR dangers can enhance Android API security, protect user data, and bolster application resilience. © 2023 IEEE.

关键词： Sensitive data

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Enhancing Search Efficiency: Analyzing Learning Mechanisms in Metaheuristics

Enhancing Search Efficiency: Analyzing Learning Mechanisms i...

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Information Technology and Computing (ICITCOM), International Conference on

作者： Teddy Nurcahyadi Christian Blum Mechanical Engineering Study Program Engineering Faculty Universitas Muhammadiyah Yogyakarta Yogyakarta Indonesia Consejo Superior de Investigaciones Científicas Institut d'Investigació en Inielligència Artificial Barcelona Spain

ISBN: (数字)9798350379839

ISBN: (纸本)9798350379846

Metaheuristics have evolved significantly in the last few decades. Nowadays, more complex problems and essential applications are emerging, requiring more powerful metaheuristics to handle them. This article analyzes the characteristics and performance of existing metaheuristics, with particular emphasis on their learning mechanisms. Several critical aspects for improvement are identified, and several promising future research areas are recommended.

关键词： Learning systems Metaheuristics Memory Benchmark testing Maintenance Information technology Standards Faces

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Creating Mathematical Models to Help Formulate Company Strategies for Knowledge Management System Implementation 9

Creating Mathematical Models to Help Formulate Company Strat...

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9th International Conference on Information Management and Technology, ICIMTech 2024

作者： Sardjono, Wahyu Perdana, Widhilaga Gia Pranata, Dewi Sagita BINUS Graduate Program Master of Information Systems Management Bina Nusantara University Information Systems Management Department Jakarta11480 Indonesia Post Graduate Program of Management Science State University of Jakarta Jakarta13220 Indonesia King's College London Cyber Security Studi Program Faculty of Natural Mathematical & Engineering Sciences Department of Informatics Strands West MinsterWC2R 2LS United Kingdom

ISBN: (纸本)9798350390025

This research aims to build a mathematical model to formulate the problems of implementing knowledge management systems in companies that often face obstacles in achieving the desired objectives and goals. With increasing competition in the business sector, organizations or organizations realize the importance of utilizing the knowledge assets that reside in each individual and organization. If this knowledge can be managed optimally, it can become a competitive advantage for the company due to the emergence of innovative ideas by the concepts of knowledge management theory. By implementing optimal knowledge management (KM), companies can design innovative solutions to improve business operations and increase overall revenue. The factor analysis method will be used to find the determining factors for the success of the implementation of knowledge management systems (KMS) and the regression analysis method will also be used to form a mathematical model of several new factors which are formed as independent variables with the current level of community understanding of KMS as the dependent variable. The research results provide insight into strategies to improve success factors to successfully facilitate KMS implementation. This study contributes to existing knowledge management by providing insight into dynamics that go beyond the technical aspects of KMS, ultimately developing strategies for more effective and efficient utilization of knowledge and organizational growth and supporting competitive advantage for companies. © 2024 IEEE.

关键词： Knowledge organization system (KOS)

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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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The influence of motorcycle behavior on saturation flow rate at signalized intersections with and without exclusive stopping space for motorcycle (ESSM) 3

The influence of motorcycle behavior on saturation flow rate...

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3rd International Conference on Smart City Innovation, ICSCI 2020

作者： Kariyana, I.M. Suthanaya, P.A. Wedagama, D.M.P. Ariawan, I.M.A. Dissanayake, D. Engineering Study Program Udayana University Bali Indonesia Department of Civil Engineering Faculty of Engineering Udayana University Bali Indonesia School of Engineering Newcastle University Newcastle upon Tyne United Kingdom

Traffic in most developing nations is considered mixed or heterogeneous. Motorcycle and other vehicle's behavior at signalized intersections would not probably have a similar influence on intersection capacity and time of the traffic signals. In theory, the saturation flow rate is a basic parameter to estimate the intersection capacity and time of the traffic signals. This study, therefore, aims to analyze the influence of motorcycle behavior on the saturation flow rate at signalized intersections in Denpasar, Bali. Traffic flow data are observed at four signalized intersection approaches that have similar width and traffic characteristics. Two approaches have exclusive stopping space for motorcycles (ESSM) while the other two do not. The study results show that more than 50% of motorcycles tend to be distributed beside flow at signalized intersections with ESSM on either light or dense traffic flows. In contrast, at the signalized intersections without ESSM, motorcycles are found to be distributed inside flow during low traffic conditions, while distributed beside flow during dense traffic flow. Besides, the saturation flow rates of motorcycle inside flow are less than that of beside flow at signalized intersections both with and without ESSM. A new method to estimate saturation flow is proposed. © Published under licence by IOP Publishing Ltd.

关键词： Motorcycles

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Improvement of PID Based on Fuzzy Logic Controller for Controlling Attitude of a Quadcopter

Improvement of PID Based on Fuzzy Logic Controller for Contr...

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Aerospace Electrical engineering and informatics (ICAAEEI), International Conference of Adisutjipto on

作者： Ernando Rizki Dalimunthe Horas Nico L. P. Sibuea Dirga Rama Setiadi Akhmad Jayadi Jaka Persada Sembiring Elka Pranita Faculty of Engineering and Computer Science Universitas Teknokrat Indonesia Bandar Lampung Indonesia Informatic Management Study Program Politenik Negeri Lampung Bandar Lampung Indonesia

ISBN: (数字)9798331507930

ISBN: (纸本)9798331507947

The quadcopter has a fairly simple mechanical design because it does not require other drives to perform various movements such as roll, pitch, and yaw. The simplicity of this mechanical design has a considerable impact on the complexity of its control. Therefore, it is necessary to have a good control method to maintain the stability of the quadcopter. The research aims to maintain stability of quadcopter by using a combination of the Fuzzy Logic Controller (FLC) with the Proportional-Integral-Derivative (PID) method, where FLC is used to initialize the input of the PID method to find the quadcopter stability point. The application of fuzzy methods for the initial tuning of PID parameters has proven effective in enhancing the system's fundamental performance, such as overshoot, rise time, and settling time, compared to the conventional PID approach. The proposed method can reduce overshoot by over 20%, with reductions reaching up to 88% in yaw motion. Additionally, the Fuzzy-PID approach significantly improves stability, shortening the time to achieve steady-state by less than 1 seconds for all movements while PID did more than 2s for pitch and roll motions and over 1s for yaw motion.

关键词： Fuzzy logic Power demand PI control Attitude control Stability analysis Regulation Steady-state PD control Tuning Quadrotors

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IoT: Monitoring Temperature, Water pH, and Automatic Water Drainage Systems for Gurami Cultivation

IoT: Monitoring Temperature, Water pH, and Automatic Water D...

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Networking, Electrical engineering, Computer Science, and Technology (IConNECT), International Conference on

作者： Heni Sulistiani Wijaya Saputra Dedi Darwis Auliya Rahman Isnain Ardy Rimanda Putra Yosi Khairunisa Study Program of Accounting Information System Universitas Teknokrat Indonesia Lampung Indonesia Study Program of Computer Engineering Universitas Teknokrat Indonesia Lampung Indonesia Study Program of Informatics Universitas Teknokrat Indonesia Lampung Indonesia Regional Research and Development Agency Lampung Province (Balitbangda) Lampung Indonesia

Gurami is a native fish from Indonesian waters that is much-loved by Indonesian people for daily food consumption. The gurami inhabits still waters such as swamps, lakes, and ponds. Besides that, carp cannot live in a water content that is too alkaline or acidic, the oxygen content in the water must be stable. Water quality is a very important factor and can affect the survival of cultivated fish. Several parameters must be considered in improving the development of carp, one of which is the temperature and pH of the water and automatic drainage of water. In this paper, we conduct IoT-based research that focuses on controlling water temperature and pH and automatically draining pool water. Water temperature and pH control such as a pH sensor temperature sensor and a water turbidity sensor will later be connected to the ESP 32 microcontroller which already has a wi-fi module. A system that is linked to electrical power and the internet then the sensor will read the water quality including the pH temperature value and water turbidity from inside the fish pond, after getting the data, the data will go to ESP 32. This research can help gurami cultivating farmers to make it easy to control the pH temperature and perform automatic pool water draining. The results of sensor testing with actual data are pretty accurate with the average error value of the ds18b20 sensor being 0.05% while the value of the pH sensor itself is 0.07%.

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Anti-Termite Activity of Azadirachta excelsa Seed Kernel and Its Isolated Compound against Coptotermes curvignathus

Journal of the Korean Wood Science and Technology

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Journal of the Korean Wood Science and Technology 2023年第3期51卷 157-172页

作者： Adfa, Morina Wiradimafan, Khafit Pratama, Ricky Febri Sanjaya, Angga Triawan, Deni Agus Yudha S., Salprima Ninomiya, Masayuki Rafi, Mohamad Koketsu, Mamoru Department of Chemistry Faculty of Mathematics and Natural Sciences University of Bengkulu Bengkulu38371 Indonesia Research Center of Sumatera Natural Product and Functional Materials University of Bengkulu Bengkulu38371 Indonesia Master of Chemistry Study Program Faculty of Mathematics and Natural Sciences University of Bengkulu Bengkulu38371 Indonesia Department of Chemistry and Biomolecular Science Faculty of Engineering Gifu University Gifu5011193 Japan Department of Chemistry Faculty of Mathematics and Natural Sciences IPB University Bogor16128 Indonesia Tropical Biopharmaca Research Center-Institute of Research and Community Services IPB University Bogor16128 Indonesia

Azadirachta excelsa, is a plant belonging to the same genus as Indian neem (Azadirachta indica), and its use as a pesticide is reported by few studies. Despite being a different species, it is expected to have the same biopesticide potential as A. indica. Therefore, this study aims to investigate the anti-termite activity of n-hexane and methanol extracts of A. excelsa seed kernel at various concentrations against Coptotermes curvignathus. The methanol extract demonstrated greater termicidal activity than n-hexane at doses test of 2%, 4%, and 8%. It also showed 100% termite mortality on the third day of administering the 8% dose. According to the gas chromatography with mass spectrometry data, the putative main components of the n-hexane extract were hexadecanoic acid, ethyl ester (18.99%), 9,12-octadecadienoic acid (Z,Z)-(16.31%), and 9-octadecenal (16.23%). In contrast, the principal constituents of methanol extract were patchouli alcohol (28.1%), delta-guaiene (15.15%), and alpha-guaiene (11.93%). Furthermore, limonoids profiling of A. excelsa methanol extract was determined using Ultrahigh-performance liquid chromatography coupled with quadrupole-Orbitrap high-resolution mass spectrometry. The number of limonoids identified tentatively was fifteen, such as 6-deacetylnimbin, nimbolidin C, nimbolide, 6-acetylnimbandiol, 6-deacetyl-nimbinene, salannol, 28-deoxonimbolide, gedunin, nimbandiol, epoxyazadiradione, azadirone, 2',3'-dihydrosalannin, marrangin, nimbocinol, and azadirachtin. They were the same as those reported in the seed and leaves of A. indica, but its largest component in A. excelsa was 6-deacetylnimbin. As a result, the presence of these compounds may be responsible for the anti-termite activity of A. excelsa seed kernel extract. Additionally, column chromatography of methanol extract yielded 6-deacetylnimbin, which was found to be antifeedant and termiticide against C. curvignathus. © 2023 The Korean Society of Wood Science & Technology.

关键词： Mass spectrometry

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Identification of changes in the morphological space structure of Bandar Lampung City using overlay geographic information system analysis 1

Identification of changes in the morphological space structu...

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1st Universitas Lampung International Conference on Science, Technology and Environment, ULICOSTE 2020

作者： Ghazi, A.B. Fitra, H.A. Persada, Citra Urban and Regional Planning Study Program Department of Infrastructure and Regional Technology Institut Teknologi Sumatera Indonesia Architecture Study Program Department of Architecture Faculty of Engineering University of Lampung Indonesia

Cities are developing due to population growth, socio-economic structure changes, technology and spatial interaction with its surroundings. "Bagian Wilayah Kota (BWK) C"or so-called "urban zone C"of Bandar Lampung municipality comprising districts of Sukarame, Tanjung Senang, and Way Halim is currently growing both internally and externally due to the development of Trans-Sumatera highway and Institute Teknologi Sumatera (ITERA). The dynamics of development and activities have caused a growing physical urban space, affecting the changes of urban structure directly. The current development in BWK C has been considered as unmanageable and potentially caused some problems in spatial plan in the future. To prevent the chaotic of spatial plan in the future, this study aims to identify the changes of urban structure in BWK C of Bandar Lampung municipality due to the internal and external development of its area. This study benefits in providing comprehensive standpoints about the process of urban structure changes based on urban activities so that city government could gain a systematic discourse of urban development which advantages in policymaking for spatial development in Bandar Lampung municipality in the future. This study conducted several analytical methods ranging from comparative analysis, spatial analysis, and hierarchical centrality index analysis. For data collection, this study applied secondary data survey and field work observation, using data from 2010 to 2016. The findings of this study reveal that the physical development in BWK C is getting compacted as its morphology changed from ribbon shaped city to octopus shaped city. © Published under licence by IOP Publishing Ltd.

关键词： Geographic information systems

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