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Open AccessArticle
9 Pages, 6,385 KB Download PDF

Solar Energy Assessment, Estimation, and Modelling using Climate Data and Local Environmental Conditions

Advances in Science, Technology and Engineering Systems Journal, Volume 7, Issue 2, Page # 103–111, 2022; DOI: 10.25046/aj070209
Abstract:

On Renewable Energy (RE), this field covers the most significant share of the world energy demand and challenges on the expensive measurement and maintenance equipment to be used. In all studies and designs, global solar radiation (GSR) measurements require assessment, estimation, and models to be applied together with the environment and meteorological data on installing…

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(This article belongs to the SP12 (Special Issue on Multidisciplinary Sciences and Engineering 2021-22) & Section Green & Sustainable Science & Technology (GSS))
Open AccessArticle
21 Pages, 1,007 KB Download PDF

On the Construction of Symmetries and Retaining Lifted Representations in Dynamic Probabilistic Relational Models

Advances in Science, Technology and Engineering Systems Journal, Volume 7, Issue 2, Page # 73–93, 2022; DOI: 10.25046/aj070207
Abstract:

Our world is characterised by uncertainty and complex, relational structures that carry temporal information, yielding large dynamic probabilistic relational models at the centre of many applications. We consider an example from logistics in which the transportation of cargoes using vessels (objects) driven by the amount of supply and the potential to generate revenue (relational) changes…

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(This article belongs to the SP12 (Special Issue on Multidisciplinary Sciences and Engineering 2021-22) & Section Applied Mathematics (MAP))
Open AccessArticle
10 Pages, 1,328 KB Download PDF

IT Project Management Models in an Era of Digital Transformation: A Study by Practice

Advances in Science, Technology and Engineering Systems Journal, Volume 7, Issue 2, Page # 53–62, 2022; DOI: 10.25046/aj070205
Abstract:

In 1998 we were talking about an NTIC era, and since the years 2010, we are tracing the beginning of a new era of technological development, called the era of digital transformation. During this new era companies have started to run towards the digitalization of their processes, which represent a large part of the market,…

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(This article belongs to Section Software Engineering in Computer Science (CSE))
Open AccessArticle
21 Pages, 10,607 KB Download PDF

Power Management and Control of a Grid-Connected PV/Battery Hybrid Renewable Energy System

Advances in Science, Technology and Engineering Systems Journal, Volume 7, Issue 2, Page # 32–52, 2022; DOI: 10.25046/aj070204
Abstract:

This paper presents novel Energy Management Strategies (EMSs), and the control of a Grid-Connected Hybrid Renewable Energy System (GCHRES). The GCHRES describes a Photovoltaic Generator (PVG) and a Battery-Based Storage System. Both are tied to the Common Coupling Point (CCP) through a reversible three-phase inverter. The CCP combines the Utility Grid (UG) and an AC…

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(This article belongs to Section Electrical Engineering (ELE))
Open AccessArticle
17 Pages, 1,520 KB Download PDF

Automated Hydroponic System using Wireless Sensor Networks

Advances in Science, Technology and Engineering Systems Journal, Volume 7, Issue 2, Page # 1–17, 2022; DOI: 10.25046/aj070201
Abstract:

Researchers have associated agriculture and food processing with adverse environmental impacts like; falls in the underground freshwater table, energy consumption, and high carbon emission. These factors have the worst effect on developing countries. Therefore, there is a need for on-demand food production techniques that require minimum resource utilization. For these reasons, scientists are now focusing…

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(This article belongs to Section Interdisciplinary Applications of Computer Science (CSI))
Open AccessArticle
10 Pages, 514 KB Download PDF

Estimation of Non-homogeneous Thermal Conductivity using Fourier Heat Equation Considering Uncertainty and Error Propagation

Advances in Science, Technology and Engineering Systems Journal, Volume 7, Issue 1, Page # 90–99, 2022; DOI: 10.25046/aj070109
Abstract:

The present work develops an estimator for thermal conductivity using a simple exper- iment implemented in a simulated solid metallic bar. The bar is sectioned in a finite number of segments, lately called nodes, and a discretization of the Fourier heat equation is applied in each node to generate a timed-spaced model of the temperature…

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(This article belongs to Section Thermodynamics (THD))
Open AccessArticle
11 Pages, 1,497 KB Download PDF

A Novel Algorithm Design for Locating Fault Distances on HV Transmission Lines

Advances in Science, Technology and Engineering Systems Journal, Volume 7, Issue 1, Page # 79–89, 2022; DOI: 10.25046/aj070108
Abstract:

The transmission network has been considered among the globe’s prevalent complex systems, comprised of hundreds of electrical transmission lines and other equipment used to transmit electrical energy from one location to another. Over a decade, power engineers have worked tirelessly to ensure that the transmission network operates reliably, transmitting electrical energy from the power station…

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(This article belongs to the SP12 (Special Issue on Multidisciplinary Sciences and Engineering 2021-22) & Section Electrical Engineering (ELE))
Open AccessArticle
19 Pages, 8,031 KB Download PDF

Thermoelectric Generators (TEGs) and Thermoelectric Coolers (TECs) Modeling and Optimal Operation Points Investigation

Advances in Science, Technology and Engineering Systems Journal, Volume 7, Issue 1, Page # 60–78, 2022; DOI: 10.25046/aj070107
Abstract:

Sustainable energy is gradually becoming the norm today due to greenhouse warming effects; as a result, the quests for different renewable energy sources such as photovoltaic cells as well as energy efficient electrical appliances are becoming popular. Therefore, this article explores the alternative energy case for thermoelectricity with focus on the steady-state mathematics, mixed modelings…

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(This article belongs to the SP12 (Special Issue on Multidisciplinary Sciences and Engineering 2021-22) & Section Thermodynamics (THD))
Open AccessArticle
13 Pages, 2,992 KB Download PDF

Value Trace Problems for Code Reading Study in C Programming

Advances in Science, Technology and Engineering Systems Journal, Volume 7, Issue 1, Page # 14–26, 2022; DOI: 10.25046/aj070103
Abstract:

C programming is taught in a lot of universities across the world as the first computer programming language. Then, for novice students, it is important to read many simple C source codes and understand their behaviors to be familiar to the programming paradigm. Unfortunately, effective tools to support independent code reading study at home have…

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(This article belongs to the SP11 (Special Issue on Innovation in Computing, Engineering Science & Technology 2021) & Section Theory & Methods in Computer Science (CTM))
Open AccessArticle
6 Pages, 1,728 KB Download PDF

Opinion and Effectiveness of Kahoot! use in Online Distance Learning in Crop Production at Higher Education Level: A Case of Study

Advances in Science, Technology and Engineering Systems Journal, Volume 7, Issue 1, Page # 8–13, 2022; DOI: 10.25046/aj070102
Abstract:

Kahoot is one of the most popular learning platforms, with over 2.5 billion players per year worldwide, used mainly for knowledge review through gamification. However, students´ opinion and its effectiveness in online distance learning as well as in another language teaching has been little studied. With these aims, this study was carried out in the…

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(This article belongs to Section Education (EDU))
Open AccessArticle
6 Pages, 1,136 KB Download PDF

Video Risk Detection and Localization using Bidirectional LSTM Autoencoder and Faster R-CNN

Advances in Science, Technology and Engineering Systems Journal, Volume 6, Issue 6, Page # 145–150, 2021; DOI: 10.25046/aj060619
Abstract:

This work proposes a new unsupervised learning approach to detect and locate the risks “abnormal event” in video scenes using Faster R-CNN and Bidirectional LSTM autoencoder. The approach proposed in this work is carried out in two steps: In the first step, we used a bidirectional LSTM autoencoder to detect the frames containing risks. In…

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(This article belongs to Section Artificial Intelligence in Computer Science (CAI))
Open AccessArticle
7 Pages, 1,040 KB Download PDF

Study and Implementation of LEDs Drivers with Dimming Capability

Advances in Science, Technology and Engineering Systems Journal, Volume 6, Issue 6, Page # 130–136, 2021; DOI: 10.25046/aj060617
Abstract:

Nowadays, LED lights take an important place in our daily lives and they have known a great growth in indoor as well as in outdoor lighting applications. LED (Light Emitting Diode) light sources including their own drivers have excluded many systems fitted with both inefficient light sources. In this paper we present, a LED driver…

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(This article belongs to Section Electrical Engineering (ELE))
Open AccessArticle
6 Pages, 392 KB Download PDF

Modelling and Testing Services with Continuous Time SRML

Advances in Science, Technology and Engineering Systems Journal, Volume 6, Issue 6, Page # 60–65, 2021; DOI: 10.25046/aj060609
Abstract:

The SENSORIA Reference Modeling Language (SRML) aims at modelling composite services at a high level. Continuous time SRML extends SRML so that it can model services whose components can perform both discrete processes and continuous processes. In order to show how continuous time SRML is applied, in this paper, we systematically introduce our study on…

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(This article belongs to the SP11 (Special Issue on Innovation in Computing, Engineering Science & Technology 2021) & Section Theory & Methods in Computer Science (CTM))
Open AccessArticle
9 Pages, 1,349 KB Download PDF

Service Robot Management System for Business Improvement and Service Extension

Advances in Science, Technology and Engineering Systems Journal, Volume 6, Issue 6, Page # 34–42, 2021; DOI: 10.25046/aj060606
Abstract:

Service robots are applied in many kinds of business fields and its various kinds of data can be collected with service robot in business scenes. Therefore, it becomes more important to utilize such data for business improvement. Additionally, due to limitation of design such as body size and battery life, a service robot cannot prepare…

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(This article belongs to the SP11 (Special Issue on Innovation in Computing, Engineering Science & Technology 2021) & Section Robotics (ROB))
Open AccessArticle
5 Pages, 633 KB Download PDF

Assessment of Transformer Cellulose Insulation Life Expectancy Based on Oil Furan Analysis (Case Study: South African Transformers)

Advances in Science, Technology and Engineering Systems Journal, Volume 6, Issue 6, Page # 29–33, 2021; DOI: 10.25046/aj060605
Abstract:

The ageing of oil-immersed power transformers triggers several defects and damages in the insulating materials, particularly in the cellulose insulation. The decomposition of the cellulose paper produces dissolved gases into the insulating oil, in which the Dissolved Gas Analysis (DGA) of the oil samples can provide insights to incipient faults sustained by the transformer as…

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(This article belongs to the SP11 (Special Issue on Innovation in Computing, Engineering Science & Technology 2021) & Section Instruments & Instrumentation (IIN))
Open AccessArticle
7 Pages, 561 KB Download PDF

Service Lifetime Loss Evaluation Method for Transformers Exclusively Serving Solar Power Plants

Advances in Science, Technology and Engineering Systems Journal, Volume 6, Issue 6, Page # 22–28, 2021; DOI: 10.25046/aj060604
Abstract:

In the last decade, South Africa has attracted and attained more investment by means of the Renewable Energy Independent Power Producer Procurement Programme (REI4P), which is, a structured invitation to Independent Power Producers (IPPs) to submit a bid to generate and supply power to the electrical grid. In spite of REI4P’s undeniable triumph, a much-discussed…

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(This article belongs to the SP11 (Special Issue on Innovation in Computing, Engineering Science & Technology 2021) & Section Green & Sustainable Science & Technology (GSS))
Open AccessArticle
10 Pages, 1,252 KB Download PDF

Lean Six Sigma Implementation in the Food Sector: Nexus between Readiness-Critical Success Factors

Advances in Science, Technology and Engineering Systems Journal, Volume 6, Issue 6, Page # 12–21, 2021; DOI: 10.25046/aj060603
Abstract:

Lean Six Sigma (LSS) is a renowned approach for boosting operational excellence and competitive advantage through integrated core objectives of value creation and variation reduction. Despite its proven benefits in many leading companies, LSS implementation in the food sector is still behind compared with other sectors. LSS implementation is costly, and most businesses have failed…

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(This article belongs to the SP11 (Special Issue on Innovation in Computing, Engineering Science & Technology 2021) & Section Operations Research & Management Science (ORM))
Open AccessArticle
6 Pages, 505 KB Download PDF

Problems of Increasing the Intelligence of Algorithms for Optimal Distribution of the Current Load on the Combined Heat and Power Plant and Ways to Solve Them

Advances in Science, Technology and Engineering Systems Journal, Volume 6, Issue 5, Page # 369–374, 2021; DOI: 10.25046/aj060542
Abstract:

The problem of optimal distribution of the current load of a combined heat and power plant with a complex composition of equipment is considered. A multi-criteria approach is proposed for parts of graphs with a constant load in time, considering the factors of economy, reliability and ecology. For sections of the graph with a time-variable…

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(This article belongs to Section Automation & Control Systems (ACS))
Open AccessArticle
8 Pages, 732 KB Download PDF

Neural Network for 2D Range Scanner Navigation System

Advances in Science, Technology and Engineering Systems Journal, Volume 6, Issue 5, Page # 348–355, 2021; DOI: 10.25046/aj060539
Abstract:

Navigation of a moving object (drone, vehicle, robot, and so on) and related localization in unknown scenes is nowadays a challenging subject to be addressed. Typically, different source devices, such as image sensor, Inertial Measurement Unit (IMU), Time of Flight (TOF), or a combination of them can be used to reach this goal. Recently, due…

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(This article belongs to the SP12 (Special Issue on Multidisciplinary Sciences and Engineering 2021-22) & Section Instruments & Instrumentation (IIN))
Open AccessArticle
13 Pages, 1,187 KB Download PDF

The Effect of Obstacle Design Architectures on Randomly Ranging AGVs in a Shared Workspace

Advances in Science, Technology and Engineering Systems Journal, Volume 6, Issue 5, Page # 335–347, 2021; DOI: 10.25046/aj060538
Abstract:

As mobile robots or Automated Guided Vehicles age, and their navigation components wear down, downtime may increase, and therefore robots may lose their path planning capabilities. In such blind-navigation scenarios, we assume robot(s) is programmed to undergo a default random-walk locomotion in a two-dimensional confined workspace with spatially populated obstacles. The robot(s) has only one…

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(This article belongs to Section Robotics (ROB))
Open AccessArticle
5 Pages, 751 KB Download PDF

Enhancing Decision Trees for Data Stream Mining

Advances in Science, Technology and Engineering Systems Journal, Volume 6, Issue 5, Page # 330–334, 2021; DOI: 10.25046/aj060537
Abstract:

Data stream gained obvious attention by research for years. Mining this type of data generates special challenges because of their unusual nature. Data streams flows are continuous, infinite and with unbounded size. Because of its accuracy, decision tree is one of the most common methods in classifying data streams. The aim of classification is to…

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(This article belongs to Section Artificial Intelligence in Computer Science (CAI))
Open AccessArticle
7 Pages, 632 KB Download PDF

TETRA™ Techniques to Assess and Manage the Software Technical Debt

Advances in Science, Technology and Engineering Systems Journal, Volume 6, Issue 5, Page # 303–309, 2021; DOI: 10.25046/aj060534
Abstract:

The paper examines the company’s proprietary means for determining the quality of a software product and measuring its technical debt. The paper’s authors explain how a software product’s quality is directly correlated with the amount of varying technical debts that the end-users receive. All debts can be paid, and technical debt is no exception: one…

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(This article belongs to Section Automation & Control Systems (ACS))
Open AccessArticle
6 Pages, 439 KB Download PDF

Reading Acquisition Software for Portuguese: Preliminary Results

Advances in Science, Technology and Engineering Systems Journal, Volume 6, Issue 5, Page # 297–302, 2021; DOI: 10.25046/aj060533
Abstract:

The persistent difficulties in reading and spelling acquisition are a risk factor for learning motivation. Play-like intervention tools have been developed to face these difficulties. “I read” is a software that seeks to develop and introduce systematic reading and spelling skills training in a playful and complementary way. This software is intended for children at…

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(This article belongs to the SP11 (Special Issue on Innovation in Computing, Engineering Science & Technology 2021) & Section Interdisciplinary Applications of Computer Science (CSI))
Open AccessArticle
6 Pages, 965 KB Download PDF

Ensemble Learning of Deep URL Features based on Convolutional Neural Network for Phishing Attack Detection

Advances in Science, Technology and Engineering Systems Journal, Volume 6, Issue 5, Page # 291–296, 2021; DOI: 10.25046/aj060532
Abstract:

The deep learning-based URL classification approach using massive observations has been verified especially in the field of phishing attack detection. Various improvements have been achieved through the modeling of character and word sequence of URL based on convolutional and recurrent neural networks, and it has been proven that an ensemble approach of each model has…

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(This article belongs to the SP12 (Special Issue on Multidisciplinary Sciences and Engineering 2021-22) & Section Information Systems in Computer Science (CIS))
Open AccessArticle
12 Pages, 1,087 KB Download PDF

Comparative Analysis and Modern Applications of PoW, PoS, PPoS Blockchain Consensus Mechanisms and New Distributed Ledger Technologies

Advances in Science, Technology and Engineering Systems Journal, Volume 6, Issue 5, Page # 279–290, 2021; DOI: 10.25046/aj060531
Abstract:

Central authorities have registered economic transactions based on trust since the dawn of time. With the advent of paper, methods for documenting transactions and records became more difficult and detailed. With the widespread use of computers in recent years, digital recording has made record keeping easier and since then every technical advancement has made data…

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(This article belongs to the SP11 (Special Issue on Innovation in Computing, Engineering Science & Technology 2021) & Section Interdisciplinary Applications of Computer Science (CSI))
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