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International Conference on Power engineering and Renewable Energy (ICPERE)

作者： Bagas Maulana Sutardi Ariesa Budi Zakaria Ilham Akbar Kevin Marojahan Banjar-Nahor Nanang Hariyanto Graduate Program PLN-ITB PLN Corporate University Jakarta Indonesia School of Electrical Engineering and Informatics Institut Teknologi Bandung (ITB) Bandung Indonesia

ISBN: (纸本)9781665455497

Isolated power systems are typically found in rural areas that are far separated from the power grid. Rapid decrease in BESS (Battery Energy Storage Systems) cost provides new opportunities and preferences for utilities to store cheap energy at low loads and power out that energy at peak loads. BESS is installed to shave or level demand during peak hours in an isolated system can avoid the use of peaking generations mostly coming from oil fuels. Considering the BESS function for peak shaving, the approach is to simulate the unit commitment of different battery sizes at 10 MW, because the use of oil fuels about 10 MW at peak load, so the simulation will be representing the total energy of the battery needed by the system. Based on the simulation, the life cycle cost is significantly greater than the benefit at all power and energy ratings. The purpose of this paper is to demonstrate the comprehensive technical and financial analysis needs to find the optimum battery type and capacity to provide optimum impact and financially benefit the system with an approach to shaving peaks and energy costs. A study-case method is demonstrated by taking an isolated system as the base and BESS performance can accelerate voltage in the subsystem for every substation when discharging at peak load. The simulation results that 10 MW/10 MWh lithium-ion batteries provide the highest benefit compared to the life cycle cost.

关键词： Renewable energy sources Costs Substations Oils Simulation Voltage Power grids

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0.9 V, 5 nW, 9 ppm/oC resistorless sub-bandgap voltage reference in 0.18μm CMOS

0.9 V, 5 nW, 9 ppm/oC resistorless sub-bandgap voltage refer...

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2014 IEEE 5th Latin American Symposium on Circuits and Systems, LASCAS 2014

作者： Mattia, Oscar E. Klimach, Hamilton Bampi, Sergio Microelectronics Graduate Program Federal University of Rio Grande Do sul Porto Alegre RS Brazil Electrical Engineering Department Federal University of Rio Grande Do sul Porto Alegre RS Brazil Informatics Institute Federal University of Rio Grande Do sul Porto Alegre RS Brazil

ISBN: (纸本)9781479925070

In this work a novel resistorless sub-bandgap voltage reference (BGR) is introduced. It is a self-biased and small area topology that works in the nano-ampere current consumption range, and under 1 V of power supply. The analytical behavior of the circuit is described, and simulation results for a standard 0.18 μm CMOS process are analysed. A reference voltage of 479 mV is demonstrated, with a temperature coefficient of 8.79 ppm/oC for the 0 to 125 °C range, while the power consumption of the whole circuit is 4.86 nW under a 0.9 V power supply at 27 oC. The estimated silicon area is 0.0012 mm2. © 2014 IEEE.

关键词： CMOS integrated circuits

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Revealing a Country’s Government Discourse Through BERT-based Topic Modeling in the US Presidential Speeches

Revealing a Country’s Government Discourse Through BERT-bas...

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International Conference on Computer, Control, informatics and Its Applications (IC3INA)

作者： Rafi Mahmud Zain Sajarwo Anggai Tukiyat Ahmad Musyafa A. A. Waskita Graduate Program of Informatics Engineering Universitas Pamulang Pamulang Indonesia Research Center for Data and Information Sciences National Research and Innovation Agency Bandung Indonesia

ISBN: (数字)9798331542313

ISBN: (纸本)9798331542320

This paper analyzes presidential speeches from the United States, delivered by the current president, Joe Biden, from his inauguration until April 3, 2024, using BERT-based topic modeling techniques. Since the role and actions of the United States affect global affairs, inferring latent topics from these speeches are important for making informed decisions and also useful to researchers. We provide experiments combining different embedding methods and clustering algorithms for dimensionality reduction. Our experiment results demonstrated that using DistilBERT embeddings followed by HDBSCAN clustering and UMAP dimensionality reduction consistently produced meaningful and interpretable topics, and this paper introduces the UMASS and NPMI metrics for evaluating topic coherence, with the best values of these metrics among the other schemes investigated. Some of the dominant themes conveyed in the American president’s state of the union speech that were successfully revealed in this study include international cooperation, alongside significant attention to environmental, community, health, and economic issues.

关键词： Measurement Dimensionality reduction Economics Digital control Visualization Government Coherence Medical services Security informatics

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Are folksonomies shared conceptualizations?

Are folksonomies shared conceptualizations?

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International Conference on Computer Supported Cooperative Work in Design

作者： Josiane M. Pinheiro Cesar A. Tacla Emerson Cabrera Paraiso Graduate Prog. in Electrical and Computer Engineering Federal Technological University of Parana Curitiba-Pr Brazil Graduate Program in Informatics Pontificia Universidade Catolica do Parana Curitiba-Pr Brazil

This article presents a method to assess whether folksonomies are useful shared conceptualizations for conceptual modeling. A method based on the tripartite model (actors, concepts and instances) induces from social applications a folksonomy related to a domain of knowledge. The hypothesis of this paper is that if folksonomies are shared conceptualizations, then using them in conceptual modeling should reduce the number of divergences between actors when they elicit terms to be part of a model (a concept map in this article). A controlled experiment of conceptual modeling was performed with experimental groups who received tags inducted from data of categorizations from Delicious and control groups who received terms extracted from Web pages categorized on Delicious. The results show that the experimental groups obtained less divergences (on average) in elicitation of terms when compared to control groups.

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MOS-only M-2M DAC for ultra-low voltage applications 6

MOS-only M-2M DAC for ultra-low voltage applications

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6th IEEE Latin American Symposium on Circuits and Systems, LASCAS 2015

作者： Sperotto, Israel Klimach, Hamilton Bampi, Sergio Microelectronics Graduate Program Federal University of Rio Grande Do sul Porto Alegre RS Brazil Electrical Engineering Department Federal University of Rio Grande Do sul Porto Alegre RS Brazil Informatics Institute Federal University of Rio Grande Do sul Porto Alegre RS Brazil

ISBN: (纸本)9781479983322

This work presents a study of the CMOS based R-2R ladder network (also called M-2M) Digital-to-Analog Converter (DAC) as a potential candidate for ultra-low voltage (ULV) applications, i.e. supply voltages VDD lower than 200mV. MOS transistors operate in subthreshold under such very low VDD, and the circuit analysis must be done using an all-region continuous MOSFET model. Simulation results in a commercial 130 nm process corroborate the presented analysis, showing that it is possible to implement this DAC topology for 6 to 8 bits operating under supply voltages from 70 mV to 140 mV. © 2015 IEEE.

关键词： Digital to analog conversion

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A Prototype Power Transmission System with Backdrivability and Responsiveness using Magnetorheological Fluid Direction Converter and Clutch

A Prototype Power Transmission System with Backdrivability a...

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IEEE International Conference on Systems, Man and Cybernetics

作者： Zhuoyi He Mitsuhiro Kamezaki Peizhi Zhang Sahil Shembekar Ryuichiro Tsunoda Shigeki Sugano Graduate Program for Embodiment Informatics for Leading Graduate Schools Waseda University Tokyo Japan Research Institute for Science and Engineering (RISE) Waseda University Tokyo Japan School of Creative Science and Engineering Waseda University Tokyo Japan

ISBN: (数字)9781728185262

ISBN: (纸本)9781728185279

Transmission systems that enable speed, torque, and direction conversion with high responsiveness and back-drivability are strongly required for higher performance robotic systems. Engagement states can be changed by clutches, but traditional clutches cannot change the direction and provide sufficient backdrivability. On the other hand, direction conversion can be realized by gear box such as bevel gears, but its backdrivability is poor. Thus, we newly develop a prototype transmission system with backdrivablity and responsiveness integrating clutch and direction converter using magnetorheological fluid (MRF). MRF is a functional fluid consisted of magnetic particles and carrier fluids which can change its viscosity rapidly and continuously according to the strength of magnetic field. MRF clutch consists of driving and driven shaft connected by vanes and coils for controlling MRF. MRF direction converter consists of bevel gears, brake, and MRF for reversing the output direction. In addition to traditional functions, such as speed and torque conversion, the proposed power transmission system provides five working modes: forward direction, reverse direction, and three kinds of free, according to states of the MRF clutch, MRF direction converter, and brake. Preliminary experiments revealed that the proposed transmission system could adequately realize implemented functions.

关键词： Viscosity Torque Gears Prototypes Power transmission Magnetic liquids Brakes

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Experimentation of Integrating Roadmapping and Sci-Fi Prototyping Methods

Experimentation of Integrating Roadmapping and Sci-Fi Protot...

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2024 Portland International Conference on Management of engineering and Technology, PICMET 2024

作者： Nishinaka, Miwa Shirahada, Kunio Kishita, Yusuke Miyamoto, Dohjin Osawa, Hirotaka Kiyokawa, Sachiko Takeda, Hideaki The Graduate School of Management Kagawa University Kagawa Takamatsu Japan Ishikawa Nomi Japan The University of Tokyo Department of Precision Engineering Tokyo Japan Communication in Science and Technology Education and Research Program Hokkaido University Sapporo Japan Keio University Faculty of Science and Technology Kanagawa Yokohama Japan Graduate School of Education The University of Tokyo Tokyo Japan National Institute of Informatics Tokyo Japan

ISBN: (纸本)9781890843458

In 2023, we proposed a hypothetical knowledge management framework that incorporates science fiction prototyping (SFP) into the traditional roadmapping (RM) method to make RM more innovative and create a future beyond what we can currently imagine. Our main objective is to create a new organizational knowledge co-creation method for generating innovative ideas by incorporating humanistic factors utilizing SFP into RM. In the current article, we present the exploratory study we conducted to examine the hypothetical framework. Experimental workshops were held in November 2023 to compare the integrated method, in which SFP is applied to RM, with the original RM method. We followed a crossover design in the workshops and analyzed the results qualitatively and quantitatively following the perspectives proposed in the hypothetical framework. The qualitative analysis revealed successful integration regarding diverse and broader perspectives. The quantitative analysis utilizing Wilcoxon signed rank tests showed that the scores of the integrated method were significantly higher than those of RM for variables evaluating the effectiveness of the integration, while not for variables related to participants' feelings and satisfaction with the workshops, and sustainability. These findings indicate that the integration was successful in terms of its effectiveness as a method, while participants' subjective feelings toward the workshops were not different in both methods. As for sustainability, which requires a long-term perspective, no apparent differences were observed in these short-term workshops. © 2024 PICMET.

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An Examination of the Possible Application of Artificial Intelligence Audit Process in Organizations 6

An Examination of the Possible Application of Artificial Int...

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6th International Conference on Cybernetics and Intelligent System, ICORIS 2024

作者： Sardjono, Wahyu Pranata, Dewi Sagita Isamesal, Muhammad Information Systems Management Department BINUS Graduate Program Bina Nusantara University Jakarta11480 Indonesia Cyber Security Studi Program Department of Informatics Faculty of Natural Mathematical & Engineering Sciences King’s College London West Minster WC2R 2LS United Kingdom Management Department Faculty of Economics and Busines Universitas of Airlangga Surabaya10430 Indonesia

ISBN: (纸本)9798331539603

This study investigates how artificial intelligence (AI) can transform audit processes, including how AI can be used in businesses to execute non-technical audit tasks and what effect this will have on those tasks. A qualitative case study methodology is used in the research design to give detailed insights into how AI is being adopted by businesses. This study aims to analyze the aspects that impact AI implementation from the viewpoints of managers, auditors, and other stakeholders. The findings show that artificial intelligence (AI) has a great deal of promise for non-technical audit procedures in businesses. AI can automate tedious jobs, evaluate large data sets to identify hazards and enhance teamwork and communication. These developments may lead to increased productivity, maybe better audit quality, and more effective processes. But there are still difficulties. Data quality is essential to the success of AI integration, and auditors may exhibit bias in favor of human professionals. Careful thought must also be given to ethical issues about transparency and possible job displacement. All things considered, this study adds significant knowledge to both the academic literature and real-world auditing applications. It improves our comprehension of the function of AI in the industry and provides useful information for people involved in information technology development, audit, and legislation. © 2024 IEEE.

关键词： Data quality

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Comparison of Potential Telemarketing Customers Predictions with a Data Mining Approach using the MLPNN and RBFNN Methods

Comparison of Potential Telemarketing Customers Predictions ...

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International Conference on Information and Communications Technology (ICOIACT)

作者： Annisa Nurul Puteri Dewiani Zulkifli Tahir Post-graduate Program of Electrical Engineering Hasanuddin University Makassar Indonesia Dept. Electrical Engineering Hasanuddin University Makassar Indonesia Dept. Informatics Engineering Hasanuddin University Makassar Indonesia

Bank as a company that has many customers who conduct transactions every day, of course, has data that is increased continuously. In this paper, customer transaction data has been predicted to find potential customers in deposit offer. Data mining approach has been performed to classify potential customers for marketing through telemarketing. This data analysis can be used as a consideration in determining marketing strategy decisions for marketing managers. 15,713 data with 13 class attributes and 1 target class were obtained from UCI Machine Learning repository. The data was divided into 70% training data and 30% test data. Feedforward method of Artificial Neural Network was used to classify customer data. Multilayer Perceptron Neural Network and Radial Basis Function Neural Network were used to obtain optimal classification results. The result of this classification predicted potential customers to subscribe deposits. The result of this study indicated that the Radial Basis Function Neural Network method with 95.3% accuracy and 96.4% sensitivity was a better method compared to the Multilayer Perceptron Neural Network method with 88.0% accuracy and 99.4% sensitivity.

关键词： Artificial neural networks Data mining Multilayer perceptrons Support vector machines Radial basis function networks Entropy

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Needle Insertion Control Method for Minimizing Both Deflection and Tissue Damage

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Journal of Medical Robotics Research 2019年第1期4卷

作者： Tsumura, Ryosuke Takishita, Yusuke Iwata, Hiroyasu Department of Creative and Science Engineering Waseda University Tokyo Japan Graduate Program of Embodiment Informatics Waseda University Tokyo Japan

Because fine needles can easily be deflected, accurate needle insertion is often difficult. Lower abdominal insertion is particularly difficult because of less imaging feedback;thus, an approach for allowing a straight insertion path by minimizing deflection is beneficial in cases of lower abdominal insertion. Although insertion with axial rotation can minimize deflection, the rotational insertion may cause tissue damage. Therefore, we established a novel insertion method for minimizing both deflection and tissue damage by combining rotation and vibration. Using layered tissues, we evaluated the effect of a combination of rotation and vibration in terms of deflection and tissue damage, which were measured by the insertion force and torque, and the area of the hole created by the needle using histological tissue sections to measure tissue damage. The experimental results demonstrated that insertion with unidirectional rotation is risky in terms of tissue wind-up, while insertion with bidirectional rotation can decrease deflection and avoid wind-up. We also found that insertion with vibration can decrease the insertion force and torque. Therefore, insertion with a combination of bidirectional rotation and vibration can minimize needle deflection and tissue damage, including the insertion force and torque and the hole area. © 2019 World Scientific Publishing Company.

关键词： deflection Needle insertion tissue damage

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