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Keyword: Variability
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Open AccessArticle
6 Pages, 830 KB Download PDF

The First Study on Ionospheric Peak Variability over Equatorial Africa (COSMIC-2)

Advances in Science, Technology and Engineering Systems Journal, Volume 10, Issue 4, Page # 14–19, 2025; DOI: 10.25046/aj100402
Abstract:

In regions like the African equatorial region, where ground-based sensors like ionosondes and incoherent scatter radars are limited, satellite-based radio occultation (RO) observations offer a new alternative for ionospheric data collecting and optimization. Using RO measurements from the mostly newly launched COSMIC-2 (Constellation Observing System for Meteorology, Ionosphere, and Climate-2) mission, hence, the equatorial Africa,…

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(This article belongs to Section Meteorology & Atmospheric Sciences (MAS))
Open AccessArticle
6 Pages, 823 KB Download PDF

Investigating Heart Rate Variability Index Classification in Macaca fascicularis and Humans: Exploring Applications for Personal Identification and Anonymization Studies

Advances in Science, Technology and Engineering Systems Journal, Volume 9, Issue 1, Page # 143–148, 2024; DOI: 10.25046/aj090114
Abstract:

In this paper, we determine the feasibility of differentiating between the heart rate patterns of Macaca fascicularis and human infants by comparing pertinent hyperparameters. This verification process was undertaken to ascertain the suitability of Macaca fascicularis heart rate data as a testbed for evaluating heart rate parameter privacy safeguarding methodologies. The biological characteristics of Macaca…

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(This article belongs to the SP15 (Special Issue on Innovation in Computing, Engineering Science & Technology 2023) & Section Bioinformatics (BIF))
Open AccessArticle
11 Pages, 5,100 KB Download PDF

Analysis of Linear and Non-Linear Short-Term Pulse Rate Variability to Evaluate Emotional Changes during the Trier Social Stress Test

Advances in Science, Technology and Engineering Systems Journal, Volume 8, Issue 3, Page # 69–79, 2023; DOI: 10.25046/aj080309
Abstract:

In conjunction with psychological stress, physiological indicators such as heart rate (HR) and heart rate variability (HRV) are frequently employed. This study uses a substitute for heart rate variability (HRV) known as short-term pulse rate variability (PRV) to evaluate emotional changes. We examined sixteen college students using a low-cost photoplethysmograph and obtained a short-term PRV…

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(This article belongs to the SP14 (Special Issue on Computing, Engineering and Multidisciplinary Sciences 2022-23) & Section Psychology (PCL))
Open AccessArticle
9 Pages, 1,189 KB Download PDF

Stress Level Classification Using Heart Rate Variability

Advances in Science, Technology and Engineering Systems Journal, Volume 4, Issue 3, Page # 38–46, 2019; DOI: 10.25046/aj040306
Abstract:

The research programme reported in this paper is set within the framework of our research under the theme of ICT support for Active Healthy Ageing (AHA). This longitudinal empirical research is focused on the study of the impact on the management of cardio-vascular disease if supported by sustained health monitoring using wearable connected devices. One…

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(This article belongs to the SP6 (Special Issue on Recent Advances in Engineering Systems 2018-19) & Section Biomedical Engineering (EBI))
Open AccessArticle
7 Pages, 1,166 KB Download PDF

Impact of Line Resistance Combined with Device Variability on Resistive RAM Memories

Advances in Science, Technology and Engineering Systems Journal, Volume 3, Issue 1, Page # 11–17, 2018; DOI: 10.25046/aj030102
Abstract:

In this paper, the performance and reliability of oxide-based Resistive RAM (ReRAM) memory is investigated in a 28nm FDSOI technology versus interconnects resistivity combined with device variability. Indeed, common problems with ReRAM are related to high variability in operating conditions and low yield. At a cell level ReRAMs suffer from variability. At an array level,…

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(This article belongs to the SP4 (Special issue on Advancement in Engineering Technology 2017-18) & Section Electronic Engineering (EEE))
Open AccessArticle
13 Pages, 1,294 KB Download PDF

Economic Replacement of Plants and Equipment: A Decision-Making Framework in Engineering

Advances in Science, Technology and Engineering Systems Journal, Volume 10, Issue 5, Page # 20–32, 2025; DOI: 10.25046/aj100503
Abstract:

While prior research has focused on siloed approaches to equipment replacement, this study introduces an integrated decision-making framework that synergizes predictive maintenance (IoT/M), dynamic multi-criteria analysis (MCDM), and sustainability-driven material selection. By validating this model through cross-sector case studies and strategic operational planning across various industrial sectors. We demonstrate a 30% improvement in replacement timing…

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(This article belongs to Section Manufacturing Engineering (EMF))
Open AccessArticle
7 Pages, 1,858 KB Download PDF

True Random Number Generator Implemented in ReRAM Crossbar Based on Static Stochasticity of ReRAMs

Advances in Science, Technology and Engineering Systems Journal, Volume 9, Issue 5, Page # 30–36, 2024; DOI: 10.25046/aj090504
Abstract:

True Random Number Generators (TRNG) find applications in various fields, especially hardware security. We suggest a TRNG that exploits the intrinsic static stochasticity of Resistive Switching Random Access Memories (ReRAMs) to generate random bits. Other suggested designs use stochasticity in the switching mechanism, which requires high precision over input voltage and time. In the proposed…

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(This article belongs to the SP17 (Special Issue on Innovation in Computing, Engineering Science & Technology 2024-25) & Section Hardware & Architecture in Computer Science (CHA))
Open AccessArticle
17 Pages, 2,552 KB Download PDF

Evaluation of Various Deep Learning Models for Short-Term Solar Forecasting in the Arctic using a Distributed Sensor Network

Advances in Science, Technology and Engineering Systems Journal, Volume 9, Issue 3, Page # 12–28, 2024; DOI: 10.25046/aj090302
Abstract:

The solar photovoltaic (PV) power generation industry has experienced substantial, ongoing growth over the past decades as a clean, cost-effective energy source. As electric grids use ever-larger proportions of solar PV, the technology’s inherent variability—primarily due to clouds—poses a challenge to maintaining grid stability. This is especially true for geographically dense, electrically isolated grids common…

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(This article belongs to the SP16 (Special Issue on Computing, Engineering and Multidisciplinary Sciences 2024) & Section Electrical Engineering (ELE))
Open AccessArticle
8 Pages, 1,186 KB Download PDF

Effective Learning of Tax Regulations using Different Chatbot Techniques

Advances in Science, Technology and Engineering Systems Journal, Volume 5, Issue 6, Page # 439–446, 2020; DOI: 10.25046/aj050652
Abstract:

Teaching tax-related regulations have always been a challenge due to the inclusion of external variables that hinder the learning process, such as the high complexity of tax systems and legislation variability. Universities have sought different alternatives to support the teaching process both outside and inside the classroom, ranging from recreational activities to active learning. This…

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(This article belongs to the SP9 (Special Issue on Multidisciplinary Innovation in Engineering Science & Technology 2020) & Section Interdisciplinary Applications of Computer Science (CSI))
Open AccessArticle
8 Pages, 3,318 KB Download PDF

Supervised Learning Techniques for Stress Detection in Car Drivers

Advances in Science, Technology and Engineering Systems Journal, Volume 5, Issue 6, Page # 22–29, 2020; DOI: 10.25046/aj050603
Abstract:

In this paper we propose the application of supervised learning techniques to recognize stress situations in drivers by analyzing their Skin Potential Response (SPR) and the Electrocardiogram (ECG). A sensing device is used to acquire the SPR from both hands of the drivers, and the ECG from their chest. We also consider a motion artifact…

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(This article belongs to the SP9 (Special Issue on Multidisciplinary Innovation in Engineering Science & Technology 2020) & Section Bioinformatics (BIF))
Open AccessArticle
7 Pages, 790 KB Download PDF

Computational Intelligence and Statistical Learning Performances on Predicting Dengue Incidence using Remote Sensing Data

Advances in Science, Technology and Engineering Systems Journal, Volume 5, Issue 4, Page # 344–350, 2020; DOI: 10.25046/aj050440
Abstract:

Dengue is a viral infection disease transmitted to people through the bite of specific mosquito species living in a tropical zone. According to the World Health Organization, dengue has been listed among the top-ten diseases for 2019 as it makes 3.9 billion people in 128 countries be at risk of infection. One major cause of…

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(This article belongs to the SP9 (Special Issue on Multidisciplinary Innovation in Engineering Science & Technology 2020) & Section Artificial Intelligence in Computer Science (CAI))
Open AccessArticle
7 Pages, 671 KB Download PDF

Analysis of Local Rainfall Characteristics as a Mitigation Strategy for Hydrometeorology Disaster in Rain-fed Reservoirs Area

Advances in Science, Technology and Engineering Systems Journal, Volume 5, Issue 3, Page # 299–305, 2020; DOI: 10.25046/aj050339
Abstract:

The Gembong reservoir in Pati Regency, Java, Indonesia is a rain-fed reservoir, which experiences a depletion of it carrying capacity. The characteristic of local rainfall is one of the important factors in assessing the potential of hydrometeorology disasters in its area. Sedimentation in watersheds and reservoirs has covered water sources, so local rainfall determines the…

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(This article belongs to Section Environmental Sciences (ENS))
Open AccessArticle
8 Pages, 804 KB Download PDF

Stress Response Index for Traumatic Childhood Experience Based on the Fusion of Hypothalamus Pituitary Adrenocorticol and Autonomic Nervous System Biomarkers

Advances in Science, Technology and Engineering Systems Journal, Volume 5, Issue 1, Page # 317–324, 2020; DOI: 10.25046/aj050140
Abstract:

Stress occurring in the early days of an individual was often assumed to cause several health consequences. A number of reports indicated that having to deal with unfavourable events or distress situation at a young age could tweak stress responses leading to a broad spectrum of poor mental and physical health condition. Therefore, changes identified…

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(This article belongs to the SP8 (Special Issue on Multidisciplinary Sciences and Engineering 2019-20) & Section Behavioral Sciences (BHS))
Open AccessArticle
8 Pages, 847 KB Download PDF

Configurable Process Model: Discovery Approach from Event Logs

Advances in Science, Technology and Engineering Systems Journal, Volume 5, Issue 1, Page # 183–190, 2020; DOI: 10.25046/aj050124
Abstract:

In the domain of business process management, the configurable process model is widely used to optimize time and cost of business process models design, which is known as the concept of “reuse”. Using process mining techniques for process model discovery helps to provide a better view on processes and improve quality of models. The majority…

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(This article belongs to the SP8 (Special Issue on Multidisciplinary Sciences and Engineering 2019-20) & Section Information Systems in Computer Science (CIS))
Open AccessArticle
10 Pages, 812 KB Download PDF

A Model for Optimising the Deployment of Cloud-hosted Application Components for Guaranteeing Multitenancy Isolation

Advances in Science, Technology and Engineering Systems Journal, Volume 3, Issue 2, Page # 174–183, 2018; DOI: 10.25046/aj030220
Abstract:

Tenants associated with a cloud-hosted application seek to reduce running costs and minimize resource consumption by sharing components and resources. However, despite the benefits, sharing resources can affect tenant’s access and overall performance if one tenant abruptly experiences a significant workload, particularly if the application fails to accommodate this sudden increase in workload. In cases…

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(This article belongs to the SP4 (Special issue on Advancement in Engineering Technology 2017-18) & Section Interdisciplinary Applications of Computer Science (CSI))

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