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A conceptual framework of deploying a trained CNN model for mobile breast self-screening 18

A conceptual framework of deploying a trained CNN model for ...

18th International Conference on Electrical engineering/Electronics, Computer, Telecommunications and Information Technology, ECTI-CON 2021

作者： Roslidar Muchamad, Masduki Khamdan Arnia, Fitri Syukri, Maimun Munadi, Khairul Universitas Syiah Kuala Doctoral Program School of Engineering Post Graduate Program Banda Aceh23111 Indonesia Universitas Syiah Kuala Department of Electrical and Computer Engineering Banda Aceh23111 Indonesia Universitas Syiah Kuala Banda Aceh23111 Indonesia Universitas Syiah Kuala Medical Faculty Banda Aceh23111 Indonesia Universitas Syiah Kuala Banda Aceh23111 Indonesia

ISBN: (纸本)9780738111278

In this article, we propose a conceptual framework of mobile self-screening to detect breast cancer at the initial stage using temperature characteristics. A trained convolutional neural network (CNN) is implemented to extract and classify the breast thermogram. Moreover, a histogram of temperature distribution is also provided to support a recommendation to the user. As we consider the user's data privacy, reliability, low latency, and low cost, we also suggest some recommendations in inferencing the CNN model on the mobile device. Finally, we describe the application overview to demonstrate the feature function. © 2021 IEEE.

关键词： Neural network models

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Gas vesicle isolated from microorganisms to act as ultrasound contrast agent

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Research on Biomedical engineering 2021年第1期37卷 1-7页

作者： Garrute, Felipe Vianna Machado, João Carlos Biomedical Engineering Program-COPPE Federal University of Rio de Janeiro Horácio Macedo Ave. 2030 Center of Technology Block H Room 327 Rio de JaneiroRJ21941-914 Brazil Post-graduate Program in Surgical Sciences Department of Surgery School of Medicine Federal University of Rio de Janeiro Carlos Chagas Filho Ave. 373 Health Sciences Center Block K Room 49 Rio de JaneiroRJ21941-902 Brazil

Purpose: Ultrasound contrast agent (UCA), used to enhance the contrast in ultrasonography, consists of microbubbles filled with an inert gas and encapsulated with a protein or a lipidic-stabilize membrane. The UCAs are able to resonate when exposed to ultrasound waves and to generate an echo-acoustic signal with increased intensity. Recently, a technique to produce UCA from microorganisms was developed and it consists of lysing microorganism cells to obtain gas vesicle (GV) after cultivation in the laboratory. GVs occur almost exclusively in aquatic microorganisms, as Microcystis aeruginosa (MYC), and provide buoyancy which permit to float towards the water surface. This work implemented a technique to produce GVs from MYC, at the Ultrasound Laboratory, and inspected their properties of acting as UCAs, analyzed through ultrasonic images acquired at 40 MHz, and their structural characteristics such as morphology, diameter, and length. Methods: After the cultivation of MYC, the buoyant cells with GVs were separated from the culture medium and submitted to cell lysis with chemical treatment. Thereafter, the solution with lysed cells was centrifuged, at 300g during 8 h at 4–8 °C, to isolate the GVs (absorbance 0.6, λ = 500 nm). Results: Transmission electron microscopy inspection revealed the MYC-GVs with elliptical morphology and having a diameter between 100 and 150 nm and length near to 200 nm. B-mode ultrasound images of the solutions proved the GV’s ability to generate an echo signal, thus confirming their performance as UCAs. © 2020, Sociedade Brasileira de Engenharia Biomedica.

关键词： Cytology

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Comparison of potential telemarketing customers predictions with a data mining approach using the MLPNN and RBFNN methods 2

Comparison of potential telemarketing customers predictions ...

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2nd International Conference on Information and Communications Technology, ICOIACT 2019

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

ISBN: (纸本)9781728116556

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. © 2019 IEEE

关键词： Data mining

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The application of membrane filtration process for the reduction of laundry waste contaminants: Performance and antifouling properties of chitosan modified PVDF

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AIP Conference Proceedings 2024年第1期3082卷

作者： Yanna Syamsuddin Sofyana Zuhra Cut Meurah Rosnelly Annisa Lutfiana Aulia Chintia Ambarita Rauzah Tarisma Sri Mulyati Department of Chemical Engineering Faculty of Engineering Universitas Syiah Kuala Banda Aceh 23111 Indonesia Doctoral Program School of Engineering Post Graduate Program Universitas Syiah Kuala Banda Aceh 23111 Indonesia

The laundry liquid waste treatment has been carried out using a membrane filtration method. PVDF membrane was modified with chitosan as an additive and made by phase inversion technique. The performance of the membrane was tested against pure water flux and removal of COD and BOD compounds in laundry waste. COD and BOD are parameters that indicate the presence of organic pollutants in laundry waste. The research results show that pure water flux, BOD and COD fluxes of modified PVDF membrane increased compared to pure PVDF membrane. The selectivity of the modified membrane decreased slightly due its porosity is more porous than pure membrane. The modified membrane was able to reduce 61.45 % COD and 82.56 % for BOD. This value is lower than the pure PVDF value, which gives a percent removal of 68 % for BOD and 89.54% for COD. The antifouling properties were tested by measuring the Fouling Recovery Ratio (FRR). The FRR value of the modified membrane is higher than of the pure PVDF membrane, that was 97.62% and 84,3%, respectively.

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Golden snail shell as a chitosan source for modification of membranes based off hydrophobic polymers: Performance of humus acid removal in a crossflow system

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AIP Conference Proceedings 2024年第1期3082卷

作者： Syawaliah Muchtar Cut Rosnelly Meurah Yanna Syamsuddin Aulia Chintia Ambarita Anisa Luthfiana Sri Mulyati Department of Chemical Engineering Faculty of Engineering Universitas Syiah Kuala Banda Aceh 23111 Indonesia Doctoral Program School of Engineering Post Graduate Program Universitas Syiah Kuala Banda Aceh 23111 Indonesia

Membranes from blending of chitosan with hydrophobic polymers Polyethersulfone (PES) and Polyvinylidene Fluoride (PVDF) have been prepared, characterized, and evaluated in terms of antifouling properties against humus acid contained in water. The preparation of membrane adapts the common phase inversion technique, whereas the filtration performance test was done by using crossflow set-up. The findings of the work showed that the addition of 5% chitosan into the casting solution increased the permeability of both hydrophobic membranes. The positive outcome from the increased hydrophilicity simultaneously results in a higher pure water flux of the chitosan-blended membranes compared to the original ones. Not only that, the modification also improves the antifouling properties of the membranes which shown from an increase in Flux Recovery Ratio (FRR) of 92% and 88% respectively for PES and PVDF membranes with the addition of 5% chitosan. The obtained results evidenced that golden snail shell is a potential modifier for membrane production.

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Electrical power quality improvement by using electricity treatment system

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AIP Conference Proceedings 2024年第1期3039卷

作者： Heddy Darmawan Charles O. P. Marpaung Periaman Sirumapea Post Graduate Program of Electrical Engineering Universitas Kristen Indonesia (UKI) Jakarta Indonesia Electrical Engineering Department Universitas Kristen Indonesia (UKI) Jakarta Indonesia

This publication aims to provide the most significant knowledge for advancing power quality using an electricity treatment system. The voltage between neutral and ground (NEV) has been confirmed to be zero volts for safety reasons. The NEV must be zero volts, especially concerning modern computer hardware or the time of 4-O. Regulator Sed device regulators will receive inaccurate data if the NEV is more significant than zero volts or higher than the value set in NEC 2020, which differs from what the industrial factory wants. Additionally, a human exposed to high NEV may risk an electric shock. The Electricity Treatment System was developed to improve the electrical power quality, including NEV and other electrical characteristics.

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Grid-Forming MMC: A Comparison between Single- and Dual-Loop Control Approaches 16

Grid-Forming MMC: A Comparison between Single- and Dual-Loop...

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16th Brazilian Power Electronics Conference, COBEP 2021

作者： Freitas, Cleiton M. Watanabe, Edson H. Monteiro, Luis F. C. Rio de Janeiro State University Dept. of Electrical Engineering Rio de Janeiro Brazil Federal University of Rio de Janeiro Electrical Engineering Program - COPPE Rio de Janeiro Brazil Rio de Janeiro State University Post-Graduate Prog. of Electronic Eng. Rio de Janeiro Brazil

ISBN: (纸本)9781665421294

This work presents an analysis of the grid-forming Modular Multilevel Converter (MMC), in the frequency domain, when it is controlled through single or dual-loop implementation. The dual-loop approach presents an inner current-loop control gathered with the external voltage-loop control, whereas the single-loop only presents a voltage-loop control for the grid-forming capability. In both cases, the control algorithms were implanted in a natural reference frame, including resonant controllers. The paper follows an impedance-modeling approach for introducing the analytical representation of the MMC in the frequency domain. These representations are, in fact, the linearized Teéenin-equivalent models of the single- and dual-loop grid-forming MMC. The results showed that the inner current-loop control is a feasible approach for damping specific resonant peaks of the Thevenin-equivalent impedance. In other words, the current-control loop adds a resistive parcel in MMC impedance in the frequency range in which the resonant peaks appear. As a consequence, the LC resonance between this impedance and the capacitor bank in the main bus is damped. The article also contains some switching-level EMTDC/PSCAD simulations to validate the work. © 2021 IEEE.

关键词： Frequency domain analysis

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Relative importance of pathologies in the severity of facade degradation

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Journal of Building Pathology and Rehabilitation 2020年第1期5卷 1-10页

作者： Bauer, Elton Piazzarollo, Carla Bozzi de Souza, Jéssica Siqueira dos Santos, Danilo Gonçalves Post-Graduate Program in Structures and Civil Construction Civil and Environmental Engineering Department University of Brasília Campus Universitário Darcy Ribeiro Asa Norte Brasília DF Brazil

The facade is the main protective barrier against the atmospheric agents acting in a building. Many times, as a result of these agents, the facade manifests pathologies that lead to the loss of performance of the external wall claddings. This article aims to establish and score the importance of the pathologies involved in the cement mortars rendering. The probable causes and the influence on the performance decrease over time are analyzed. The methodology is based on the survey and mapping of the pathologies observed in field survey, correlating these pathologies with probable causes and implications for the system performance. Among the active pathologies, cracks had both a higher intensity of occurrence and a greater gravity compared to the others. Some pathologies, such as detachment and efflorescence, although of great importance in the degradation, are little observed in the studied buildings. As a result, is presented a scale of importance of pathologies, which has great application for the development of facade degradation models. © 2020, Springer Nature Switzerland AG.

关键词： Cement mortar Degradation External wall claddings Facades Pathologies

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Universal Active Power Filter Based on AC-DC-AC Converter with Six Controlled Switches for Single-Phase Systems 12

Universal Active Power Filter Based on AC-DC-AC Converter wi...

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12th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2020

作者： Rodrigues, Phelipe L. S. Jacobina, Cursino B. Lima, Antonio M. N. Post-Graduate Program in Electrical Engineering - PPgEE - Copele Campina Grande Paraíba58429-900 Brazil Department of Electrical Engineering Campina Grande Paraíba58429-900 Brazil

ISBN: (数字)9781728158266

ISBN: (纸本)9781728158266

This paper presents an ac-dc-ac converter with six controlled switches for single-phase systems applied as a universal active power filter (UAPF). The proposed topology is feasible for compensating voltages swells and harmonics generated by nonlinear loads. The difference between the conventional and proposed topology is the replacement of a controlled leg (composed of IGBTs) for an uncontrolled leg (composed only of diodes). For performance comparisons, current THD, switching and conduction losses of the semiconductors, average switching frequency, and power in the transformer were used as parameters. Control and pulsewidth modulation techniques based on space vector approaches were developed to eliminate zero-crossing distortions caused by the use of the uncontrolled leg. Simulation and experimental results were presented for validation of the mathematical model. © 2020 IEEE.

关键词： Topology

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Quality Improvements in the Electrical Design of Typical DC-DC Electronic Power Converter for High-Voltage Applications

Quality Improvements in the Electrical Design of Typical DC-...

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International Conference on engineering and Emerging Technologies (ICEET)

作者： King Harold A. Recto Miguel T. Escoto Noel B. Hernandez Department of Electronics Computer and Communications Engineering Ateneo de Manila University Quezon City Philippines Electrical and Electronics Engineering Institute University of the Philippines Diliman Quezon City Philippines Post-doctoral Program in Quality Management of the Graduate School Centro Escolar University Manila Philippines

ISBN: (纸本)9781665491075

The green transition has brought about a worldwide-shift to the use of renewables as alternative energy sources. Because of this, high voltage DC has been a field of interest in power electronics due to its capability in efficiently transmitting power to reach remote areas. Typical DC-DC electronic power converter design has the capability of boosting voltage level to a certain extent but not enough for high-voltage applications. Using the DMAIC Approach of the Six Sigma, quality improvements in the design was proposed to stabilize operating frequency, bring up the output voltage from 100 VDC to 4,000 VDC and provide at least 10% margin of error in the apparent power measured at the output side to offset inherent losses in the electrical design. These proposed quality improvements were sustained by designing a control circuit that would ensure the attainment of the parameters set in the Define Phase of the DMAIC Approach. The result of the study is a practical 12 VDC to 4,000 VDC boost converter design that has incorporated all the proposed quality improvements.

关键词： Renewable energy sources Voltage measurement Power measurement Measurement uncertainty Green products High-voltage techniques Loss measurement

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