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2022 International Conference on Frontiers of Information Technology, FIT 2022

作者： Khurshid, Noshaba Syed, Muhammad Ibrahim Khan, Khurram Mahmood, Zahid Comsats University Islamabad Department of Electrical and Computer Engineering Abbottabad Pakistan Gik Institute of Engineering Sciences and Technology Faculty of Computer Science and Engineering Topi Pakistan

ISBN: (纸本)9798350345933

Nowadays, segmenting objects is desired to timely diagnose various diseases. This task is challenging as blood vessels share the same color and intensity information in retinal image area. Therefore, an accurate vessel segmentation method is required. This study presents an automated vessels segmentation algorithm. Our method initially extracts the Green channel on which the CLAHE and Gabor filter is applied. Final segmentation is achieved using Otsu's thresholding. Meanwhile, to reduce noise from tiny vessels, median filter, Top-hat transform and other morphological operations, such as spur operation is applied in post-processing stage. The proposed algorithm yields superior accuracy results on DRIVE and STARE than several methods and consumes nearly 1 second to produce the segmented output image. © 2022 IEEE.

关键词： Gabor filters

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Blind biosignal classification framework based on DTW algorithm

Blind biosignal classification framework based on DTW algori...

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2011 International Conference on Machine Learning and Cybernetics, ICMLC 2011

作者： Chao, Sam Wong, Fai Lam, Heng-Leong Vai, Mang-I Department of Computer and Information Science Faculty of Science and Technology University of Macau Macau China Department of Electrical and Electronics Engineering Faculty of Science and Technology University of Macau Macau China

ISBN: (纸本)9781457703065

Biosignal is a noninvasive measurement of the status of internal organism, such as electrocardiogram (ECG), electroencephalogram (EEG), and electromyogram (EMG), etc. With machine learning techniques, these biosignals are normally classified into one of a number of disease categories. Hence, they are ideally suited to support clinician in making diagnostic decision. However, if a given biosignal is an unknown type, none of the existing classification algorithms can be considered workable. In this paper, an intelligent framework that is able to automatically identify ECG from an unknown biosignal is described. In which, the first phase of the research is illustrated in detail, which focuses on classifying an unknown biosignal into ECG or other categories, by employing dynamic time warping (DTW), combined with clustering algorithm. The proposed framework consists of two major components: biosignal template construction and classification process. Biosignal template construction includes biosignal acquisition and segmentation, template optimization and management;while the classification process involves several sub-processes: biosignal preprocessing, biosignal pattern matching and majority voting. The experimental results demonstrate the effectiveness of the framework as well as the classification methodology. © 2011 IEEE.

关键词： Electrocardiograms

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Monitoring energy losses of a residential building through thermographic assessments 17

Monitoring energy losses of a residential building through t...

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17th International Conference on Development and Application systems, DAS 2024

作者： Eugen, Iavorschi Laurențiu, Milici Dan Faculty of Electrical Engineering and Computer Science Department of Electrical Engineering "Stefan cel Mare" University of Suceava Suceava Romania

ISBN: (纸本)9798350349290

One of the significant opportunities for reducing energy waste and carbon emissions is the renovation, modernization, and rehabilitation of existing buildings. Replacing the windows of existing residential buildings with new energy-efficient ones is an easy way to upgrade an existing home into a nearly zero-energy building, NZEB (nearly zero-energy building). There is a wide variety of methods to discover the thermal weak points of a building, and the continuous innovation of construction materials provides solutions to maximize energy savings and minimize heat transfer to the exterior. This document presents a methodology for visualizing and recording the temperature distribution on the investigated surface of the building envelope to identify and locate vulnerable points where heat losses to the exterior are substantial. The objective was to highlight the need for upgrading the insulation system and replacing the existing windows of the analyzed building based on a multi-objective approach to maximize the building's energy performance and increase thermal comfort indoors. Using a Fluke Ti300+ Thermal Camera, energy losses were visualized through thermographic assessments, which could provide an adequate picture for accurately assessing the building's condition before renovation, to evaluate the need for partial renovation. For the case study, a residential building with one floor and mansard roof located in a region with hot summers and cold winters in Romania was chosen. The results showed that there are several options for significantly reducing the building's energy consumption. Thus, multiple energy efficiency solutions were proposed for the building to reduce heat losses. ©2024 IEEE.

关键词： Heat transfer

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Impact of different voltage source models on antenna current and input impedance within the boundary element method formalism 24

Impact of different voltage source models on antenna current...

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24th International Conference on Applied Electromagnetics and Communications, ICECOM 2023

作者： Susnjara, Anna Poljak, Dragan University of Split Faculty of Electrical Engineering Mechanical Engineering and Naval Architecture Department of Electronics and Computer Science Split Croatia

ISBN: (纸本)9798350313017

This paper investigates the differences in dipole current and input impedance due to different source models in the framework of boundary element formalism. The half-wavelength and full-wavelength dipole antennas are placed in free space and above a lossy medium. Antenna current and input impedance are obtained by numerically solving the Pocklington's integro-differential equation via Galerkin-Bubnov Indirect Boundary Element Method (GB-IBEM). Two different feeding structures are used as excitation sources, a delta gap source model usually used under GB-IBEM formalism and a magnetic frill source model. Different segment numbers are also used. The results indicate that the current magnitude in case of half-wavelength dipole antenna varies to a relatively great extent depending on the applied voltage generator model. Input impedance does not vary due to different source models, however, its value changes greatly with segment number. © 2023 IEEE.

关键词： Boundary element method

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An efficient radix trie-based semantic visual indexing model for large-scale image retrieval in cloud environment

An efficient radix trie-based semantic visual indexing model...

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作者： Krishnaraj, N. Elhoseny, Mohamed Lydia, E. Laxmi Shankar, K. ALDabbas, Omar Department of Computer Science and Engineering SASI Institute of Technology & Engineering Tadepalligudem India Faculty of Computers and Information Mansoura University Mansoura Egypt Computer Science and Engineering Vignan's Institute of Information Technology Visakhapatnam India Department of Computer Applications Alagappa University Karaikudi India Department of Computer Engineering Faculty of Engineering Al Balqa' Applied University Salt Jordan

In recent years, massive growth in the number of images on the web has raised the requirement of developing an effective indexing model to search digital images from a large-scale database. Though cloud service offers effective indexing of compressed images, it remains a major issue due to the semantic gap between the user query and diverse semantics of large-scale database. This article presents a radix trie indexing (RTI) model based on semantic visual indexing for retrieving the images from cloud platforms. Initially, an interactive optimization model is applied to identify the joint semantic and visual descriptor space. Next, an RTI model is applied to integrate the semantic visual joint space model for finding an effective solution for searching large-scale sized dataset. Finally, a Spark distributed model is applied for deploying the online image retrieval service. The performance of the proposed method is validated on two standard dataset, namely, Holidays 1 M and Oxford 5 K in terms of mean average precision (mAP) and processing time under varying dataset sizes. During experimentation, the presented RTI model shows the maximum mAP value of 0.83 under the dataset size of 1000. Similarly, under the sample count of 1000, it is noted that the standalone server requires a maximum of 118 minutes to complete the process, whereas the spark cluster requires a minimum of around only 19 minutes to finish the process. The experimental outcome showed improvement in terms of various measures over the best rivals in the literature. © 2020 John Wiley & Sons, Ltd.

关键词： Semantics

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Design of psychological intervention delivery system using web-based MOOC for Indonesian students at risk of stunted

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AIP Conference Proceedings 2025年第1期3223卷

作者： Rozi Sastra Purna Tri Rahayuningsih Anip Febtriko Department of Psychology Medical Faculty Universitas Andalas Limau Manis 25176 Padang West Sumatera Indonesia Department of Informatics Engineering Faculty of Computer Science Putra Indonesia University YPTK Padang Jl. Raya Lubuk Begalung Padang 25145 West Sumatera Indonesia

This research aims to design a psychological intervention delivery system using a web-based Massive Open Online Course (MOOC) specifically for Indonesian students who are at risk of experiencing stunting. Stunting is a serious health problem in Indonesia and can affect children's physical and mental development. Psychological interventions can help overcome this problem by providing emotional and psychological support to students at risk of stunting. The designed system will allow easy and flexible access to psychological interventions through a MOOC platform that students can access online. The system will include a variety of psychological intervention content, such as virtual counseling, guides for parents, and educational materials on healthy eating and child development. Additionally, the system will have monitoring and evaluation features to measure progress and effectiveness of interventions. This research aims to provide innovative solutions in an effort to overcome the problem of stunting in Indonesia by utilizing technology and psychological interventions. This system is expected to help students at risk of stunting to develop their potential with the right psychological support through an easy-to-access web-based MOOC platform.

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Review of thermal performance enhancement of Solar Air Heater using shapes on absorber plate 16

Review of thermal performance enhancement of Solar Air Heate...

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16th International Conference on Development and Application systems, DAS 2022

作者： Ifrim, Visarion-Catalin Pop, Teodor University 'tefan cel Mare' of Suceava Faculty of Electrical Engineering and Computer Science Department of Electrical Engineering Suceava Romania

ISBN: (纸本)9781665481625

The increasing demand for energy and the greenhouse gas (GHG) emissions resulting from the use of conventional fuels are directing humanity towards renewable energy sources, in this case solar energy, and towards increasing investments in research and improvement of solar systems that produces both electricity and heat. For household consumers as well as for some industrial ones, the large volume of energy consumed is due to space heating, ventilation and drying. The availability of solar energy can contribute to reducing this consumption utilizing solar air heater systems. In the presence of solar energy, reducing the household energy consumption also depends on the thermal performance of these systems. Recent studies focus on improving these performances by modifying the components so that there is as much absorption of solar radiation as possible and as high a thermal transfer as possible between the absorption surface and the existing air flow through the system. The objective of this paper is to review different forms of the absorption plate and the different obstacles (roughness's) used by researchers to refine thermal performances of solar air heater systems. The role of obstacles is to create swirlers that favor heat transfer. The results presented briefly refer to thermal efficiency, thermo-hydraulic improvement factor and friction factor. The final remarks propose observations and proposals for further improvements to solar air heating domain. © 2022 IEEE.

关键词： Solar energy

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The heron formula approach for head movements detection for student focus detection during pandemic online class 6

The heron formula approach for head movements detection for ...

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6th International Conference on Information Management and Technology, ICIMTech 2021

作者： Pangestu, Gusti Mar'I, Farhana Bachtiar, Fitra A. Maulana, Fairuz Iqbal Bina Nusantara University School of Computer Science Computer Science Department Jakarta11480 Indonesia Muhammadiyah University Department of Computer and Engineering Gresik Indonesia Brawijaya University Faculty of Computer Science Malang Indonesia

ISBN: (纸本)9781665449373

Head movement are widely used and utilized, there are many things that applying head movement as a main subject such as to control a device, control a smart wheelchair, playing games and many more. In this study, we propose a preliminary study to use the head movements as a focus detector for student in online learning. We use several approaches such as Face Landmark until Heron Triangle approach to detect and recognize the movement of the head. In this study, we utilize the Heron formulas to obtain the large of triangle that shaped using the marking point from Face Landmark method. By using the large of triangle, this proposed method could obtain and recognize the gaze of head movements. Our proposed method can reach 85% of accuracy and has an ability to detect the horizontal and vertical movements. This study is an important as an initial step to create a robust head movement detection system especially for online learning purposes. © 2021 IEEE.

关键词： Students

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Review of thermal performance enhancement of Solar Air Heater using baffles on absorber plate 16

Review of thermal performance enhancement of Solar Air Heate...

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16th International Conference on Development and Application systems, DAS 2022

作者： Ifrim, Visarion-Catalin Grosu, Oana Vasilica University 'tefan cel Mare' of Suceava Faculty of Electrical Engineering and Computer Science Department of Electrical Engineering Suceava Romania

ISBN: (纸本)9781665481625

Of all renewable energies, solar energy is abundantly available and can meet current energy requirements if captured and used wisely. Solar hot air heaters are used to capture suns thermal energy and release it to a fluid present in the system. Most often this fluid is air, which after the heat transfer made between it and the absorption surface, it's used either to heat spaces or to dry various farming products. For high efficiency the absorber plate of the system must capture solar energy in as much as possible and retain energy in the presence of sunlight and release it in the absence thereof. The indoor environment to achieve a greenhouse effect without energy loss and a complete heat transfer through the absorption surface and the fluid are desirable to achieve better performances. Improving heat transfer is achievable by using obstacles on the absorber surface that break the present laminar flow and creates vortexes or eddy currents that take over a greater amount of thermal energy from the absorption surface. This work presents various investigations carried out on solar air heaters with deflectors on the absorber plate. The results obtained are summarized and referred in the paper. © 2022 IEEE.

关键词： Laminar flow

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An overview of attacks against digital watermarking and their respective countermeasures

An overview of attacks against digital watermarking and thei...

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2012 International Conference on Cyber Security, Cyber Warfare and Digital Forensic, CyberSec 2012

作者： Tanha, Maryam Torshizi, Seyed Dawood Sajjadi Abdullah, Mohd Taufik Hashim, Fazirulhisyam Computer and Communication Systems Engineering Dept. Universiti Putra Malaysia Serdang Malaysia Computer Science Dept. Faculty of Computer Science Universiti Putra Malaysia Serdang Malaysia

ISBN: (纸本)9781467314251

The increased and widespread usage of digital multimedia has aroused great concerns regarding issues such as copyright protection, copy control and proof of ownership. Digital watermarking serves as a solution to these kinds of problems;however, digital watermarking techniques have demonstrated to possess vulnerabilities. Thus opening avenues for malicious attackers to abuse these security breaches. Therefore, maintaining the security of digital watermarked media i.e. text, image, audio and video has received considerable attention. This paper has conducted a comprehensive research with special emphasis on the classification of malicious attacks against digital watermarking. Subsequently, it reviews the current countermeasures available to mitigate the intentional attacks. In addition, it procures a foundation for the evaluation of various watermarking algorithms. © 2012 IEEE.

关键词： Copyrights

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