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29,939 Article Results

A low-cost business-oriented seaport energy effective management platform

10.11591/ijape.v11.i1.pp62-90
Asimina Dimara , Dimitrios Triantafyllidis , Stelios Krinidis , Nikolaos Ntaras , Olga Koutsogianni , George Tsoukos , Athanasios Giannopoulos , Konstantinos Kitsikoudis , Dimosthenis Ioannidis , Maria Zarkadoula , Apostolos Bizakis , Stavros Antypas , Goumas Georgios , Dimitrios Tzovaras
Many seaports worldwide attempt to gain energy efficiency towards reducing their energy costs while mitigating climate change and environmental effects. In this pa- per, a low-cost business-oriented seaport energy effective management (PERFFECT) platform is introduced. PERFFECT intends to gain knowledge on fundamental port operational and business processes and evaluate them against energy efficiency and environmental footprint. Exploiting all the proposed PERFFECT applications like monitoring, evaluation, forecasting, and optimization, the energy efficiency of the op- erational infrastructure of the port’s is achieved. Port’s energy balance is estimated and used to decide the ports optimal energy usage. Moreover, the traffic volume produced by the gate check is simulated and utilized for further actions. These actions include energy savings and emission reduction recommendations. Finally, the proposed platform is evaluated against real-life data, while the experimental results present the out- come and efficiency of the system. The suggested system results in up to 82.82% light energy savings after a specific suggested action and up to 33% reduction of vehicle emissions, respectively.
Volume: 11
Issue: 1
Page: 62-90
Publish at: 2022-03-01

Demand response planning in capacity market using microgrid

10.11591/ijape.v11.i1.pp7-13
Mohammad Khadem , Mahdi Karami
Planning of the demand response has received special attention due to the cost of transmission lines development and shortage of energy resources beside the growth of demand. This research work is focused on the role of microgrid (MG) as an alternative solution for transmission system development and proposed a method for modeling of MGs in the capacity market. The results show that using of MGs leads to reduce the development costs of transmission system. Moreover, MGs cause a slight increase in the profitability of selling capacity to the consumers. These outcomes prove that continuing to grow the number and capacity of MGs in each area ultimately eliminate the inquiry of transmission network development and minimize the cost of capacity market.
Volume: 11
Issue: 1
Page: 7-13
Publish at: 2022-03-01

Implementation and study of fuzzy based KY boost converter for electric vehicle charging

10.11591/ijape.v11.i1.pp98-108
Jalla Upendar , Sangem Ravi Kumar , Sapavath Sreenu , Bogimi Sirisha
Elecetric vehicle batteries require direct current (DC) current for charging; hence the circuit alternating current (AC) is converted to DC by a battery charger. Battery charger mostly consists of a rectifier and DC-DC converter with a controller built in to serve as a protective circuit. A harmonic source load is a type of electric car charger. During the AC-DC change over method, harmonic current is introduced into the power system, affecting power quality. In this study, a charging station consisting of buck boost and a charging station consisting a KY Boost converter were simulated. To maintain output voltage of DC-DC converters constant controller is used, the controller is either PI or fuzzy logic controller. So, four models are developed and simulated which are buck-boost converter controlled by proportional-integral (PI)-controller, KY-boost converter controlled by proportional integral-controller, buck boost converter controller fuzzy logic controller and KY boost-converter controlled by fuzzy logic controller. The total harmonic distortion (THD) of the four models is compared.
Volume: 11
Issue: 1
Page: 98-108
Publish at: 2022-03-01

Analysis of switched impedance source/quasi-impedance source DC-DC converters for photovoltaic system

10.11591/ijape.v11.i1.pp14-24
Sapavath Sreenu , Jalla Upendar , Bogimi Sirisha
This paper proposes the switched impedance source converter (SZSC) or switched quasi impedance source DC-DC converter (S-qZSC) based photovoltaic (PV) grid-connected systems. To increase the voltage from low level to high level, all PV grid-connected systems need step-up DC-DC converters. This step-up factor can be increased by connecting the terminals of a traditional quasi impedance source DC-DC converter with an additional diode and a switch. In this proposed converter, the capacitor not only serves as a filter. It is, however, bound in series to the charging loops of the inductors. On the one hand, saturated inductors can trigger instability, which can be avoided. When used for dc-ac conversion, however, the modulation index of the backend H-bridge can be set to a wider range. As compared to existing Z-source-based systems, a shorter duty period results in a higher boost factor.
Volume: 11
Issue: 1
Page: 14-24
Publish at: 2022-03-01

Comprehensive analysis and design of furnace oil-based power station using ETAP

10.11591/ijape.v11.i1.pp33-51
Raheel Muzzammel , Rabia Arshad
High standards of living are linked with the availability of energy. Therefore, there is always a requirement to modify existing power generating systems or to add new systems to fulfill the increasing demands of energy. It is becoming a core issue in the South Asian region so that at least current standards of living could be maintained by controlling growing energy rates and shortening the availability of conventional sources. Furnace oil is a residue obtained in the process of distillation of crude oil in the petroleum industry. This furnace oil is applicable for power generation plants allied with the petroleum industry so that residue of oil refineries could be utilized. In this research, a furnace oil-based power plant is designed in electrical transient and analysis program (ETAP) software. Moreover, steady-state and transient analysis of the proposed design of the power plant are conducted to increase practical viability of model. Load flow is analyzed to depict the performance of the power plant model under load conditions. This model is further tested under the motor starting event to analyze the current drawn by the motor. This event helps to determine the permissible values of protective equipment installed in power plants. In the last, economic dispatch analysis is conducted to find the relative minima of generation cost of furnace oil-based power plant with respect to coal and hydel generation
Volume: 11
Issue: 1
Page: 33-51
Publish at: 2022-03-01

Comparative studies between public and private Islamic schools in the era of globalization

10.11591/ijere.v11i1.22182
Umi Kultsum , Muhammad Abrar Parinduri , Abdul Karim
The problem of decentralization is one of the main problems in madrasa modernization and independent learning. This is due to the difficult coordination and expensive learning processes being experienced. Therefore, this study aimed to determine the impact of the educational policy implementations on madrasa, with the existence of regional autonomy in Serang and Pandeglang Regencies, Indonesia. This qualitative study involved 10 participants, which contained district madrasa heads and supervisors, institutional managers, education staff, and teachers in Serang and Pandeglang. The utilized instruments were the interview protocol and observation sheet, with the data analysis being obtained through the Huberman and Miles's technique. This included reading, meaning, and data developed within the framework of the historical and ethnographic approach analysis. The results showed that there was no difference in the curriculum between public and private Islamic schools under the local government. The advantage was also observed for regional autonomy, regarding the emergence of superior, exemplary, regular, and vocational madrasas, respectively. However, the disadvantage of this policy was the difficulty in improving the quality of madrasa institutions, funding, and education personnel. These results indicated that all parties should contribute and supervise the implementation of autonomous education, to optimize the goals of each madrasa and achieve independent learning. Explicit rules are also needed regarding the understanding of discriminatory decentralization policies, especially in madrasa and other educational institutions.
Volume: 11
Issue: 1
Page: 421-430
Publish at: 2022-03-01

Implementation of FaceNet and support vector machine in a real-time web-based timekeeping application

10.11591/ijai.v11.i1.pp388-396
Ly Quang Vu , Phan Thanh Trieu , Hoang-Sy Nguyen
This paper presents in detail how to build up and implement a real-time web-based face recognition application. The system works so that images of people are recorded and compared with the references on the database. If they match, the information about their presence will be recorded. As for the system architecture, the multi-task cascaded neural network was deployed for face detection. Followingly, for the recognizing tasks, we conducted a study to compare the accuracy level of three different face recognizing methods on three different public datasets by means of both the literature review and our simulation. From the comparison, it can be drawn that the FaceNet algorithm in-used with the support vector machine (SVM) classifier performs the best among others and is the most suitable candidate for the practical deployment. Eventually, the proposed system can deliver a highly satisfactory result, proving its potentials not only for the research but also the commercial purposes.
Volume: 11
Issue: 1
Page: 388-396
Publish at: 2022-03-01

Adopting the cybersecurity concepts into curriculum: the potential effects on students’ cybersecurity knowledge

10.11591/ijeecs.v25.i3.pp1749-1758
Mohammad Azzeh , Ahmad Mousa Altamimi , Mahmood Albashayreh , Mohammad A AL-Oudat
This study examines the effect of adopting cybersecurity concepts on the information and technology (IT) curriculum and determines the potential effect on students' knowledge of cybersecurity practices and level of awareness. To this end, a pilot study was first conducted to measure the current level of cybersecurity awareness. The results revealed that students do not have much knowledge of cybersecurity. Thus, a four-step approach was proposed to infuse the relevant cybersecurity topics in five matched courses based on the latest cybersecurity curricular guidelines (CSEC2017). A sample of 42 students was selected purposively without prior knowledge of cybersecurity and divided identically into experimental and control groups. Students in the experimental group were asked to take five consecutive courses over five semesters. In each course, groups went through a pre-test for the infused topics. Then, the experimental group taught the corresponding infused topics. A post-test was administered to both groups at the end of each course, and the t-test was conducted. The results found significant differences between marks of prior and post-tests for 11 out of 14 infused topics. These satisfactory results would encourage universities to infuse cybersecurity concepts into their curriculum.
Volume: 25
Issue: 3
Page: 1749-1758
Publish at: 2022-03-01

Optimal economic dispatch using particle swarm optimization in Sulselrabar system

10.11591/ijai.v11.i1.pp221-228
Marhatang Marhatang , Muhammad Ruswandi Djalal
In this study, a particle swarm optimization (PSO) is proposed to optimize the cost of generating thermal plants in the South Sulawesi system. The study was con ducted by analyzing several methods using the lagrange and ant colony optimization (ACO). PSO algorithm converges on the 11th iteration algorithm with the lowest generation cost obtained, which is Rp129687962.17/hour. While the ACO algorithm converges on the 34th iteration with a generation cost of Rp131,473,269.39/hour. The results of optimization using PSO produce a total thermal power of 400.75 MW and losses of 26.15 MW. The PSO method is able to reduce the cost of generating the South Sulawesi system by Rp11,118,312.07/hour or 7.9%. While using the ACO method generates a generation cost of Rp131,473,269.39/hour to generate power of 400,812 MW with losses of 26,219 MW. The ACO method is able to reduce the cost of generating the South Sulawesi system by Rp9,333,004.9/hour or 6.62%. PSO algorithm provides the lowest cost calculation of generator compared with conventional methods and ACO smart methods. This is also shown in the calculation process, the PSO method completes calculations faster than the ACO method.
Volume: 11
Issue: 1
Page: 221-228
Publish at: 2022-03-01

Integration of STEM education in history learning

10.11591/ijere.v11i1.22064
Rinaldo Adi Pratama , Inne Marthyane Pratiwi , Muhammad Adi Saputra , Sumargono Sumargono
The 21st century needs pupils with learning ability and necessary skills, particularly critical thinking skills instead of content focused. The study of science, technology, engineering and mathematics (STEM) education approach can lead teachers to a new teaching approach in history learning. Through this approach, the teachers can create a new way of teaching history integrated with STEM. This study used a qualitative approach. Data collection in this research using pupil’s work samples, interview, and the teacher journal. This research was conducted in two high school and two vocational school in the urban area. The findings showed that the teachers integrated one of the historical thinking skills and understanding history. The skills are still in the lower level of historical thinking skills. For historical teaching skills to be effectively integrated in history learning, teachers need to be trained so the pupil's historical thinking skills can be enhanced through the integrated history learning with the STEM approach.
Volume: 11
Issue: 1
Page: 313-320
Publish at: 2022-03-01

Fingerprint recognition based on collected images using deep learning technology

10.11591/ijai.v11.i1.pp81-88
Ali Fadhil Yaseen Althabhawee , Bashra Kadhim Oleiwi Chabor Alwawi
The fingerprint identification is the most widely used authentication system. The fingerprint uniqueness for each human being provides error-free identification. However, during the scanning process of the fingerprint, the generated image using the fingerprint scanner may differ slightly during each scan. This paper proposes an efficient matching model for fingerprint authentication using deep learning based deep convolutional neural network (CNN or ConvNet). The proposed deep CNN consists of fifteen layers and is classified into two stages. The first stage is preparation stage which includes the fingerprint images collection, augmentation and pre-processing steps, while the second stage is the features extraction and matching stage. Regarding the implantation results, the proposed system provided the best matching for the given fingerprint features. The obtained training accuracy of the proposed model is 100% for training dataset and 100% for validating dataset.
Volume: 11
Issue: 1
Page: 81-88
Publish at: 2022-03-01

Computer simulation of water effluent propagation in the reservoirs systems

10.11591/ijeecs.v25.i3.pp1814-1824
Sevara Dzhumagaliyevna Kurakbayeva , Zhanat Rysbayevna Umarova , Aizhan Tazhiklhanovna Kalbayeva , Dzhumagali Salbekovich Kurakbayev , Sabira Tastanovna Akhmetova , Akhmetbek Akhylbekovich Musabekov
The task of the research was to build and analyze a model of the dynamics of pollution of a flowing reservoir and systems of communicating reservoirs with and without taking into account water filtration in the soil as a result of external sources (effluents from industrial enterprises). This work was aimed at studying the change in temporal dynamics, taking into account the concentration of impurities in the volumes of three reservoirs during the periods of discharge and completion, lasting 30 days. Numerical experiments were carried out for various flow rates and compositions of filtration coefficients to study the relaxation times of pollution in the system of reservoirs. Also, software was developed that analyzes the change in the concentration of impurities in the system of reservoirs. As a result, it was found that the pollution pattern is more dependent on the topology of the watercourse network.
Volume: 25
Issue: 3
Page: 1814-1824
Publish at: 2022-03-01

Effective predictive modelling for coronary artery diseases using support vector machine

10.11591/ijai.v11.i1.pp345-355
Kuncahyo Setyo Nugroho , Anantha Yullian Sukmadewa , Angga Vidianto , Wayan Firdaus Mahmudy
Coronary artery disease (CAD) is a category of cardiovascular disease that causes the highest mortality rate in the world. CAD occurs due to plaque build-up on the walls of the arteries that supply blood to the heart and other organs of the body. To control the mortality rate, a practical model that is capable of predicting CAD is needed. Machine learning approaches have been used in solving various problems in various domains, including biomedicine. However, real-world data often has an unbalanced class distribution that can interfere with classifier performance. In addition, data has many features to process. This study focuses on effective modeling capable of predicting CAD using feature selection to handle high dimensional data and feature resampling to handle unbalanced data. Feature selection is very effective by eliminating irrelevant features from the training data. Hyperparameter tuning is also done to find the best combination of parameters in support vector machines (SVM). Our results show that the SVM cross-validated ten times has a more accurate training result. Furthermore, the grid search on SVM cross-validated ten times had more accurate training model results and achieved 88% accuracy on the test data.
Volume: 11
Issue: 1
Page: 345-355
Publish at: 2022-03-01

Modelling minicab drivers' disordered behaviour for choosing passenger and destination in Akure, Nigeria

10.11591/ijaas.v11.i1.pp19-28
Adetayo Olaniyi Adeniran , Olorunfemi Samuel , Njoku Ikpechukwu
This study investigated the disordered behaviour of minicab drivers for choosing passenger and destination in Akure using the multinomial model and nested logit model respectively. Information was gathered by the distribution of questionnaires to minicab drivers plying the Federal University of Technology Akure (FUTA) North gate to the Oja-Oba axis in Akure, Nigeria. The objectives were to validate the performance of logit models; to identify the major parameters for selecting passenger and destination by disordered minicab drivers, and to examine the interrelationships of variables employed. Primary data was obtained from 314 respondents. The study found that the nested logit model gives a better utility value than the multinomial logit model with ρ02 = 0.48 more than ρc2 = 0.46 which justifies the assertion. Also, the major parameters for selecting passengers and destination by disordered minicab drivers in Akure are transport rates variable, distance variable, and travel time variable. The study recommends that an accurate pricing policy of minicab operation should be efficiently formulated, implemented, and enacted to prevent overcharging and undercharging.
Volume: 11
Issue: 1
Page: 19-28
Publish at: 2022-03-01

Undiscovered voices: Motivation and demotivation factors in learning English among Indonesian orphan students

10.11591/ijere.v11i1.21262
Zidni Ma’ruf , Bambang Widi Pratolo , Okta Widia Sari , Arlischa Ardinengtyas
This qualitative descriptive research aimed to investigate factors of motivation and demotivation in learning English among Indonesian orphan students. There were eight participants who live and study in an Indonesian orphanage. They were randomly chosen in this research. The data were mainly collected through individual semi-structured interviews and focus group discussion (FGD) sections. All interviews and FGD sections data were recorded, transcribed, analyzed, and divided into several themes and subthemes. Further, member checking was done to develop the trustworthiness of the research. The research revealed that internal and external factors were positively related to motivation and demotivation in learning English among Indonesian orphan students. Further, suggestions and policy recommendations were all offered to related parties to support and give equal educational facilities to all students since they have the same right for education.
Volume: 11
Issue: 1
Page: 441-448
Publish at: 2022-03-01
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