bluuebunny/crossref_metadata_2025 huggingface dataset:
Design and Implementation of Empower English Program Online (EEPO) for Students and Learners of Ho Chi Minh City University of Transport
Authors: Thi Lan Anh Vu , Hung Nguyen Phuc , Thao Ngo Thi Phuong
Published: February 2022

Technology and computers have affected teaching and learning English in tertiary education worldwide. It is seen as an important resource for instruction in foreign language teaching. There is a wide use of its ability to create online environments in which students can take the benefits from them. The Department of Foreign Languages (DFL) ??of Ho Chi Minh City University of Transport (UT-HCMC) recognizes the importance and the effectiveness of online English learning in the information technology era. Just a networked computer or smart phone, a headset and a course account, students can learn English anytime, anywhere. Online English learning can match different learning styles and use different activities. Currently, the Department is using the Social Learning software of Knowledge Transmission Publisher, with the simple content, high cost and the relatively low level compared to the required learning outcomes stipulated by Vietnam Ministry of Education and Training (MOET). The DFL wishes to build our own online English program to overcome the above disadvantages. Thus, this research paper explores teachers’ and students’ viewpoints on the present online program which has been used for the UT-HCMC students for the past 5 years- The Online Connected Program (OCP). The analysis of the responses to the questionnaires for teachers and students provides us with their perspectives as well as the difficulties they face when using OCP. The teachers’ and students’ suggestions are also collected. The findings obtained from this study will be used as the basis for designing a self-study online curriculum in the near future as a supplementary teaching adapted for both UT-HCMC students’ needs and UT-HCMC teachers’ expectations. The researchers present some conclusions supported by quotations from the previous papers in an attempt to draw the research theory and practice.
Implementation of 1024-point FFT Soft-Core to Characterize Power and Resource Parameters in Artix-7, Kintex-7, Virtex-7, and Zynq-7000 FPGAs
Authors: Shashidhara K. S. , Srinivasaiah H. C.
Published: February 2022

This Paper presents implementation of 1024-point Fast Fourier Transform (FFT).  The MatLab simulink environment  approach is used to implement the complex 1024-point FFT. The FFT is implemented on different FPGAs such as the following four: Artix-7, Kintex-7, Virtex-7, and Zynq-7000. The comparative study on power and resource consumption has been carried out as design parameters of prime concern. The results show that Artix-7 FPGA  consumes less power of 3.402W when compared with its contemporary devices, mentioned above. The resource consumption remains same across all the devices. The resource estimation on each FPGA is carried on and its results are presented for 1024-point FFT function implementation. This Comprehensive analysis provides a deep insight with respect to power and resources. The synthesis and implementation results such as RTL Schematic, I/O Planning, and Floor Planning are generated and analyzed for all the above devices.
East Sea - Natural Resources in Vietnam
Authors: Duong Le Hung , Dong Thi Minh Hao
Published: February 2022

In Vietnam, status is mentioned a lot in recent economic and management documents. The scientific basis of the position resources for socio-economic development is still a new issue in our country, and it is not accessible in the world. However, this is a significant direction that the right awareness will create a new perspective on the rational use of resources, spatial organization, and planning of rational and sustainable socio-economic development. Vietnam is particularly crucial in Southeast Asia thanks to a territory stretching over three thousand kilometers on the western edge of the South China Sea and a territorial sea area of over one million square kilometers, three times the area of the territory. The Vietnam Sea is located in a tropical monsoon region, with world-class rivers that the basin covers six countries. The Vietnam Sea plays an essential role in the environment, the ecology of the East Sea and the region, an exclusive transitional zone between the Indian Ocean and the Pacific Ocean in terms of biological and maritime geography. The development of an industrialized and modernized economy must inevitably be linked to the maritime potential of the ocean. This article presents the initial findings on the coastal and coastal status of Vietnam.
Current Environmental Situation and Green Solutions for Vietnam's East Sea
Authors: Dong Thi Minh Hao , Le Huu Cuong , Truong Thanh Hai
Published: February 2022

The South China Sea, including the Vietnam Sea, is witnessing significant changes under the impact of both nature and man. These are the impacts of climate change and ocean change with "extreme" signs such as increasing storms, coastal floods, sea level rise, sea acidification, pollution and environmental incidents, ... occur thicker, more intense and irregular. Especially serious degradation of the environment and biodiversity of the sea, increasing environmental incidents, including oil spills, ... due to human impact. Especially the large-scale destruction of coral reefs, seagrass beds in island clusters off the South China Sea has been happening at a worrying rate. The destructive fishing activities of humans in the South China Sea have caused ecosystem degradation and the extinction of some species, such as sea turtles, some sharks and another species. Other fish, especially the giant mussel, the consequence is a decrease in the natural capital of the sea, leading too prolonged "ecological disturbances". The reserves of seafood in the Spratly region (of Vietnam) and the West Sea in the East Sea have decreased by about 19% compared to before 2017. Therefore, the improvement of marine environment quality, including biodiversity conservation and major marine ecosystems are to preserve marine natural assets, contributing to the implementation of Vietnam's green growth strategy and action plan. This is the path that Vietnam has chosen to both grow marine economy, adapt to climate change, and protect the environment both in the short and long term, towards sustainable development.
Barcode Image Restoration for Recognition of Product Information
Authors: Vo Dung D. , Nguyen Duy T. , Nguyen Hai Thanh , Ngo Viet B.
Published: February 2022

Barcode attached on product is to transfer information to users. In practice, many barcodes are degraded over time and they are difficult for users to recognize product information. Therefore, barcode image restoration plays an important role due to clearly showing product information for users. This paper proposed a restoration approach of barcode- EAN 13 images with different degraded characteristics such as vertical lines, blurring, dashed lines. In particular, the degraded barcode images are pre-processed for restoring before recognition, in which a radon method is applied for rotating barcode image and an Otsu segmentation method is employed to split the barcode image from an original image. Therefore, bars in each barcode image are determined for recognition of the correct barcode. Barcode image datasets are collected from different practical products with different quality for restoration before recognizing them. Experimental results show to illustrate the proposed approach for the barcode recognition is the effectiveness
Crisis of Plastic Waste in Vietnam is Real
Authors: Truong Thanh Hai , Vu Hai Nam
Published: February 2022

The issue of "white pollution" at popular tourist destinations of environmental pollution is rising at an alarming rate. According to statistics, Vietnam currently ranks fourth in the world in volume of plastic waste, with approximately 730,000 tons of plastic waste going to the sea every year. Vietnam is also known as a country with twice the amount of plastic waste compared to low-income countries. Plastic waste in the ocean will destroy the natural environment, negatively affecting the lives of aquatic products. On land, plastic waste is abundant in many places and has serious impacts on human health and life. Analysts point out that, if the pace of use of plastic products continues to increase, there will be an additional 33 billion tons of plastic produced by 2050 and thus more than 13 billion tons of plastic waste will be buried. backfill into landfills or into the ocean. Meanwhile, the recycling of Vietnam's plastic waste, has not been developed. The rate of waste sorting at the source is very low, most types of waste are put together and collected by waste trucks. Plastic recycling technology used in Vietnam's major cities is outdated, low in efficiency, high in costs and polluting the environment. The paper presents the current situation of plastic waste in Vietnam as of June 2019. The authors focus on highlighting the serious "white pollution" in Vietnam, a country with a very long coastline. But the coast is really threatened by plastic waste. This is really a wake-up call to the authorities about the promulgation of policies and the people on the morality of survival with nature.
Traffic Congestion
Authors: Nguyen Minh Quyen , Pham Thi Thanh Xuan , Phan Thi Thuy Hoa
Published: February 2022

Congestion is essentially a relative phenomenon that is linked to the difference between the roadway system performance that users expect and how the system actually performs. The approach to traffic congestion (TC) from the different perspectives of countries around the world helps Vietnamese experts to better understand and come up with a consensus on how to understand the problem. this topic. Since then, in the management of traffic safety and control, to curb traffic congestion, traffic police and other departments have the basis to perform the work, properly assess the level of traffic safety to implement the task; doing well the reporting, statistics, building databases on TC; create integration in the context of international cooperation with other countries. Solving the problem of traffic congestion in large cities in Vietnam is a problem that cannot be solved overnight. This problem requires the synchronous participation of many ministries, branches and people in traffic. All measures need to get feedback from the people, thoroughly resolve the critic before implementation. This article briefly presents the situation of traffic congestion in Hanoi and Ho Chi Minh City. The team also focused on analyzing the causes of traffic congestion and proposed solutions to solve this urban problem.
Urban Transport in Vietnam:
Authors: Nguyen Thi Hoa , Phan Thi Thuy Hoa
Published: February 2022

Environmental pollution has become a problem not only for one nation, one region but also for the common concern of all humanity. The process of socio-economic development of the countries in the world has led to tremendous impacts on the environment, causing the human environment to change and become increasingly degraded. important. These are climate change - global warming, depletion of the ozone layer and acid rain ... especially air pollution caused by transportation. In Vietnam, environmental pollution in big cities is becoming a pressing problem. The problem of overcrowding of transport in big cities, which has been very difficult, now adds a serious situation of pollution that is increasing to worrying levels. What a challenging problem that is posing on the shoulders of managers. The paper presents the realities of environmental pollution, especially air pollution from vehicle emissions. Besides, also initially offering solutions to reduce pollution caused by urban transport in Vietnam.
Some Matters relating to Urban Management aiming to Reduction of Environmental Pollution
Authors: Tran Cong Tri , Dong Van Huong
Published: February 2022

Urban areas are constantly developing and rapidly, especially in recent times. According to the United Nations, in 1950 the global urban population accounted for only 29% of the world's population; this figure was 50% in 2009 and will be 60% in 2030 with about 5 billion people. In Vietnam, urban population is projected to account for 38% of the country's population by 2015, 45% of the country's population in 2020 and 50% of the national population by 2025 with about 25 million. In the process of urbanization with growth and development, cities often face significant challenges. These are: 1) Unbalanced development, over-focus on large cities makes the development gap between urban and rural areas more and more increasing; 2) Unsustainable development, rapid technical and social infrastructure systems degrading rapidly, especially housing and environmental sanitation; 3) The administrative management capacity of urban governments must often chase the rapid growth of urban areas; 4) Poverty, crime and unemployment often occur in rapidly growing cities but lack solid economic and technical bases. In order to have an identity of sustainable urban development, development cannot be separated from preserving stability in which urban management is always a very important task.
Improved Performance of Fuzzy logic Based Controller Design for Bioreactor Process Plant
Authors: Oladele Daniel A. , Shaibu Farouq Eneuma
Published: February 2022

Proportional Integral Derivative, PID control is one of the earlier control strategies and most widely used controller for industries. A nonlinear technique, Mamdani structure was used for the bioreactor Simulink model. The fuzzy logic and its structure of the controller were adopted to set the fuzzy logic input member function. The fuzzy logic controller automatically tuned the PID controller, using an existing complex mapping function to generate the suitable values for the bioreactor process plant.
Design, Fabrication and Performance Evaluation of a Charcoal-Fired Tomato Dehydrator for Developing Countries
Authors: Oluleye Modupe Atinuke
Published: February 2022

For the purpose of enhancing the food security and economies of developing countries, thereby meeting the sustainable development goals (SDGs 2030) especially SDG No. 2, which is concerned with hunger alleviation, achieving food security, improving nutrition and promoting sustainable agriculture before the year 2030, an energy-efficient charcoal-fired tomatoes dehydrator having an efficiency of 88.6% and a drying rate of 0.51 kg/hour has been designed, fabricated and tested. It basically comprises of a combustion unit (CU) for heat energy generation through the combustion of charcoal, a heat exchanger unit (HEU) comprising of fins for efficient transfer of the generated heat through a 240 V 0.15 HP DC centrifugal fan and a drying unit (DU). The results of its performance evaluation showed that, with a safe drying air temperature of 50 oC at 6 m/s fan speed, the dehydrator is capable of drying 5 kg of tomatoes per batch from an initial moisture content of 94% to 22% with a final weight of 1.4 kg over a drying period of about 7 hours. The microbiological analysis conducted on the post-drying tomato sample revealed a total bacterial counts (TBC) of 1.61 x 102 cfu/g and a total fungi counts (TFC) of 0.27 x 102 cfu/g which are both far below the allowable limits (103 cfu/g) for human consumption. The dehydrator has proved effective for extending the shelf life of tomatoes by mitigating the rate of spoilage due to microbial activities through drying, thereby enhancing the food security and economy of developing countries.
Impact of E-Trade:
Authors: Alam Md. Habib
Published: February 2022

E-commerce may be termed as e-trade. E-Trade means e-goods and e-service. E-trade is a part of International Trade law. E-trade plays a key role in the sustainable development of trade and becomes a part of international trade development. Thus, E-trade leads to the globalization of trade. Today, e-trade is expanding due to the rapid growth of trade across the world. E-trade is executed by linking among different terminals through the transnational electronic transaction. E-trade has different difficulties or barriers for its virtual world. Sustainable e-trade mechanism depends on transaction security and reliable legal framework. Non-privatization of DNS also a key factor for the development of e-trade. Different measures (i.e. transaction security, electronic signature and access control measures) should take into consideration for removing trade barriers from e-trade sector. The question may arise what should parties do with e-trade disputes. This question was answered by different scholars in different ways. Some argue to adopt proper Online Dispute Resolution to deal with e-trade disputes. Today, different adhoc online dispute settlement venues (i.e. e-arbitration) may be found across the world to deal with e-trade disputes. For the development of e-trade, different international laws should take into consideration, i.e. UNCITRAL Model Law on Electronic Commerce, United Nations Convention on International E-Contracts, WTO agreements. This is qualitative and library-based research. This research is to examine as to how future development of e-trade may be executed from an international trade law perspective.
Fuse-Fuse Protection Scheme ETAP Model for IEEE 13 Node Radial Test Distribution Feeder
Authors: Kirui Kemei Peter , Murage David K. , Kihato Peter K.
Published: February 2022

According to NEC 240.101 regulations each and every component of a power system distribution network has to have an over-current protective device (OCPD) for its protection. The OCPDs must coordinate with other devices both upstream and downstream for a reliable operation and protection of the power systems distribution network.  There are four equipment/components for the IEEE 13 node radial test feeder each modelled in this paper to be protected by fuses. These components are namely the nodes, the underground cables, the overhead distribution lines and the transformers. Equipment protection is an important and necessary exercise of performing power systems protection coordination processes. The equipment and their over-current protective device’s time-current characteristic (TCC) curves are important tools used to show and to indicate the protection requirements, landmark points and damage curves for all power systems equipment. Individual equipment protection requirements and limitations are described and identified by use of their various landmarks and damage curves. These damage curves and the landmark points are all superimposed with the Time-Current Characteristic curves of the Over-Current Protective Devices used in protecting the equipment on one composite TCC graph. Equipment damage curves which fall to the right and above the Over-Current Protective Device’s TCC curves with sufficient margins are considered to be protected by the OCPDs. Equipment damage curves which fall to the left and below the OCPD’s TCC curves are considered not to be protected by the OCPDs. IEEE Standard 241 states that on all power systems, the OCPDs should be selected and set to open before the Ampacity mark, the short circuit damage curves, and both the thermal and the mechanical damage curves limits of the protected components are exceeded. This paper presents a detailed Fuse-Fuse protection scheme for the IEEE 13 node radial test feeder as modeled on the Electrical Transients Analysis Program (ETAP).
Digital Bulletin Board for the School Community
Authors: Karageorgos Panagiotis , Gouvedaris Dimitrios
Published: February 2022

This text describes the necessity of having a digital bulletin board in the school environment. In the context of the implementation of the project, this document also describes in detail the hardware and software specifications, the proposed use and the expandability of a wireless and remote programmable digital board, also referred as DPVW (Distance Programmable Video Wall). This paper aims to provide a proposal for a universal use of digital boards for informational use of a school community, students, teachers and school staff.
Towards A Teaching Model for Managing Students’ Cognitive Load In Activities That Integrate Computational and Mathematical Thinking
Authors: Panselinas Giorgos , Mavrikis Manolis , Geraniou Eirini , Anastasiou Popi , Tambouratzis Emmanouil , Kartsonakis Emmanouil
Published: February 2022

This paper proposes a model of teaching computational thinking as a sub-competence of a digital competence framework. This teaching model is based (a) on other models of teaching and learning programming aiming at managing students’ cognitive load, (b) on exploiting the engaging nature of unplugged activities and (c) on using erroneous examples to address students’ common errors and misconceptions. The teaching model emerged from the study of the implementation of the “Reach 20 first” competence assessment educational scenario at a Greek class with 11 students of low motivation and attainment regarding computing and mathematics. We investigated (a) the impact and the key-elements of the aforementioned teaching model on students’ computational and mathematical thinking achievement and (b) the relationship between computational and mathematical thinking in computing activities. We present our findings discussing the possible implications on educational activities design and teacher support.
STEM and Collaborative Learning: An Alternative Approach
Authors: Nikiforos Stefanos , Kolyvas Spyros
Published: February 2022

STEM education in Greek schools has become more prevalent in recent years, mainly through the implementation of Educational Robotics projects. Small-scale working groups of handpicked participants constitutes the main practice of implementing these projects, aiming to participate in competitions for the purpose of discrimination. These projects are usually a parallel school activity concerning only the participants in it, having relatively little impact on school community. An alternative teaching approach is proposed and applied in the present research consisting of collaborative activities between volunteer participants who created a learning community. Results show that the proposed method satisfied students and generated their interest in both the future engagement with Robotics and the participation in similar collaborative activities.
Example of Designing Modular Vocational Syllabi
Authors: Makrygiannis Panagiotis S , Paradisi A. , Tsapelas T. , Papakitsos Evangelos C. , Piromalis Dimitrios
Published: February 2022

In this paper, an application in developing a course for secondary vocational education settings in a modular manner is discussed and a number of conclusions are drawn from the process. The application was partly intentional and partly the result of circumstances, as it was realized, being a part of the redesign process of the specialties offered within the sector of Informatics of Vocational Lyceums (upper-secondary education), the schools that offer initial vocational education in Greece. Using modular design is applicable to secondary vocational education courses. It allows for adaptability, reusability and a variety of approaches within a competence-based syllabus. It is also suggested that more courses could benefit from a modular structure, definitely including other advanced laboratorial courses, but possibly even introductory ones.
Interdisciplinary Educational Approach STEM and HASS Knowledge Fields Using ICTs Support. Case of an Application for a Pilot Experiment
Authors: Savelides Socrates C. , Fasouraki Rigo , Georgousis Efthymios , Kolokotroni Katerina , Savelidi Maria S.
Published: February 2022

This paper investigates the possibility of a holistic interdisciplinary and cross-thematic educational approach of STEM (Science, Technology, Engineering, and Mathematics) and HASS (Humanities, Arts and Social Sciences) knowledge fields. The interdisciplinary educational approach of STE? and HASS knowledge branches, set out to resolve complex issues in an innovative way, can assist the development of the students into active and knowledgeable citizens so they will be able to face actual problems whose nature is always interdisciplinary. There is reference in elements which advocate the necessity of this holistic cross-thematic approach and additionally theories and techniques are established which are able to support it. Main characteristic of this development is its support with ICTs. Characteristics of a relevant educational scenario are presented. The scenario is implemented as a pilot experiment and relevant results can be extracted. The scenario is recommended as prototype due to its special interdisciplinarity, the educational techniques that were utilized, and its design procedure based on principles of Educational Management & Engineering and due to the positive results from its pilot implementation. Relevant conclusions are projected.
Entity Configuration for Designing a Port Security Information System: Proposed Extensions of the Vocational Education and Training Curriculum
Authors: Κaltsas Apostolos , Gompou Sofia , Κotsifakos Dimitrios
Published: February 2022

Port security is one of the most important fields of Vocational Education and Training (VET) maritime studies. In this article, we propose the configuration of entities that are used to design a port security information system for VET education. Our work integrates recent maritime Information Technology (IT) concepts into VET. We record the initial design for building educational software for a school-level security information system that can be used as an extension project for the existing maritime curriculum of VET. This plan, if implemented and completed, will strengthen and expand the boundaries of school knowledge and curriculum. This article describes the design part of the whole project.
Design, Development and Implementation of Mobile Applications to Support the Educational Process in the Greek Secondary Education System
Authors: Seralidou Eleni , Vallianatos Nikos , Tsolakou Dimitra , Douligeris Christos
Published: February 2022

The purpose of this paper is the design, development and presentation of two applications that are created in order to be used for supporting the students’ learning in the Greek secondary education environment. More specifically, we present the structure and the functions of two applications under the names “Aepp_App” and “CS_App”. The applications are intended to be used by teachers and students during a lesson as well as outside the classroom settings, with the use of android mobile devices. We present the tools that have been used to develop the mobile applications and the applications’ use in the educational process. Additionally, we present the feedback received by teachers, to whom the applications were presented, who seem to like the idea of using game applications for mobile devices in order to enhance their students’ interest.
Development of a Methodology for the Design and Management of Academic Strategy – A Holist Approach using Multi-criteria Analysis Techniques
Authors: Chalaris Manolis , Gritzalis Stefanos , Sgouropoulou Cleo , Maragoudakis Manolis
Published: February 2022

Aim of the current research paper is to propose an innovative solution for the problematic of the holistic management of an academic strategy. The systematic bibliographic surveys conducted showed that the combination of BSC method together with a multitude of MCDA techniques constitute the most important tools for this issue. Thus, we propose a holistic process-based methodology for the management of an academic strategy which spans from its design and oversight, to interpretation issues of the academic classification of departments of Universities or between Universities where assembly bodies (Quality Assurance Unit, HAHE) are active. We claim that our methodology is of particular importance and that its use will highlight the operational quality of well organised Universities.
Reflections on Online Delivered Lessons, During COVID-19 Induced Restrictions, for Students of Informatics in a Vocational Lyceum of Greece
Authors: Makrygiannis Panagiotis S.
Published: February 2022

During the pandemic outbreak of COVID-19, coinciding with school year 2019-2020, house confinement measures were taken throughout Greece. Conventional face-to-face schooling presented a threat to public health. As a result the Greek Ministry of Education proceeded to suspend school operations for a while and sponsor online lessons of various shapes and forms as a temporary measure soon after. The lessons, hastily designed to address extraordinary conditions and delivered in an ad hoc manner utilizing teachers’ personal experiences and preferences to fill a gap created by house confinement, created pressures on existing infrastructures on one hand, and a corpus of diverse experiences, contradicting evidence and on occasion reports on the other. A discussion on that corpus was inevitable and took part originally among teachers of the same school either unofficially or during sessions of the teachers associations of each school. The discussion should and will expand beyond that especially in reference to cases that constitute good practices or where data were collected. To this purpose, this paper presents the case of two theoretical lessons taught at senior high-school students of the Information Applications’ Technician specialty in a Vocational Lyceum. The lessons operated surprisingly well, in comparison to similar lessons, concerning student attendance, student engagement level and continuance. Some data were collected with a questionnaire and their processing later informed discussions during reflection plenary sessions of the online class. An attempt is made to explain the divergence from the general case and reflection on results is used to draw conclusions that may benefit further attempts.
Visualizing the Educational Data Mining Literature
Authors: Papadogiannis I. , Platis N. , Poulopoulos V. , Vassilakis C. , Lepouras G. , Wallace M. , Karountzou G.
Published: February 2022

This article provides a visualization of a literature review in students’ performance prediction using educational data mining (EDM) techniques for the period 2015-2019. The results of the review are presented concisely and simply with the use of diagrams. Various aspects of the literature are examined, such as the algorithms adopted, the type of results drawn, the educational setting of the application and the actual exploitation of the outcomes. Findings indicate that tertiary education dominates the EDM field; in contrast, the focus given to secondary and primary education is minimal.
Modeling, Designing and Implementing an Open Personalized Learning Environment for the Electrical Engineering Training Course in Vocational Education
Authors: Kolyvas Georgios , Kotsifakos Dimitrios , Douligeris Christos
Published: February 2022

In this paper, we present the modeling, design, and a segment of the implementation of an Open Personalized Learning Environment (OPLE) for the Electrical Engineering course that is taught at Vocational Schools. We describe in detail how the chapters of the course are used in the online environment. As methodological principles of this construction we emphasize on the students’ learning behavior, and on the individualized promotion of knowledge, considering the simplicity and the dynamics of the open personalized environment.
“Clavis Aurea”: An augmented Reality Game for the Teaching of Local History
Authors: Koutromanos George , Pittara Theodora , Tripoulas Christopher
Published: February 2022

The aim of this study was the design, development, and evaluation of an Augmented Reality game to teach students about the local history of a Greek island. Design-based research served as the foundation of this study’s methodology. Experts in ICT in education, teachers with knowledge of the local history and primary education students participated in the evaluation of this study. The results of the evaluation showed that the game presents satisfactory levels of usability and that its content is compatible with the island’s local history. Among the factors influencing its use by students were internet connectivity, the large number of visitors at the archaeological site where the game was played, and the problem of coordinating the student groups.
Using Learning Theories for the Creation of a Distance Digital Course in Mathematics for Higher Education
Authors: Velentzas Ioannis , Doukakis Spyridon
Published: February 2022

This article presents the results of research on the effectiveness of distance education in Mathematics for higher education students. A digital course in Differential Calculus was created, which was evaluated by the students who participated in it. The aim of the quantitative research carried out was to identify the conditions needed for the implementation of a digital distance education model. The design includes the integration of activities based on learning theories at targeted points of the distance learning. From the results, it appears that the students achieved the learning outcomes that were identified. Moreover, the integration of the relevant activities had a positive impact on the students, who a) positively evaluated the program they attended and b) stated that their knowledge was enhanced at the issues negotiated on the course.
A Visual Depiction of an Educational Robotics Framework Aimed to Foster the Development of Collaboration Skills
Authors: Demetroulis Emmanouil A. , Platis Nikos , Wallace Manolis , Antoniou Angeliki , Poulopoulos Vassilis
Published: February 2022

There is a constantly growing research interest for Educational Robotics and its effects to the development of student skills. Many researchers conclude and state that E.R develops and increases the collaboration skills of students, without presenting a specific strategy or a methodology that supports the whole process. In addition, the reports are not supported by measurable results or observations of elements that comprise the collaboration skills. This research focuses at the creation of the appropriate conditions, strategy and methodology in order for collaboration skills to find solid foundations for development. It is important to be stated that collaboration is not seen as the means to produce learning outcomes, but collaboration and collaboration skills are perceived to be the outcome of this approach. The aim of this article is to provide a visual depiction of our proposed approach.
Power Loss Minimisation on 11kV Distribution Network using Feeder Reconfiguration
Authors: Ale T. O. , Abumere I. O.
Published: February 2022

The Distribution System can be seen as the networking line that interfaces between the large power generators and transmission lines on one hand and the electricity consumers on the other. The system can exist in different topologies among which, the radial form is popular because of its simplicity and comparative low cost of design. The problem of poor power quality and instability has been a major power systems challenge especially in Nigeria. More reliable and stable power systems among other benefits can be enjoyed when system are optimized. Hence, this paper implements the feeder reconfiguration technique as an optimization procedure to minimize the technical losses on the Ondo Road 11kV Feeder Segment. MATLAB is employed to simulate the optimization process and the results showed that an average of 85.47% active power loss reduction on all phases is obtainable with the proposed technique leading to an estimated financial saving of ?639,999.75 per hour.
Development of Commercial Tapioca Pearls used in Bubble Tea by Microwave Heat–Moisture Treatment in Cassava Starch Modification
Authors: Bulathgama Ashani Uthpala , Gunasekara G. D. M. , Wickramasinghe I. , Somendrika M. A. D.
Published: February 2022

Bubble tea is a trending food product around the globe and capture a high demand in the high-end market in Asian region as well. This product contains a chewy bubble in enhancing the palatability and the acceptability of the final bubble tea product, which is made with cassava starch. Cassava is an important high caloric tropical food crop, yet has a limited utilization due to its perishability and high cyanide content. Industrial processing of cassava into several food products is one of the most preferred solution for this and thus, tapioca pearl production is also one of the major food application of cassava starch. So the main objective of this study to develop a standardized and much preferred method of tapioca pearl production, and develop a tapioca pearl to be incorporated in bubble tea with higher sensory acceptance, and lower cost. A standard procedure was developed after several trials, and considering the economic benefit, cassava flour incorporated pearls were also tried. The made pearls were subjected to sensory evaluation, proximate composition and cyanide content analysis, as well as texture profile analysis, and finally, the microbiological stability of the product was also checked under refrigerated storage conditions. According to the obtained results, the final product was sensory accepted (p<0.05) over the commercially available product and had a laboratory proven shelf life of 30 days under refrigerated storage conditions.
Heat Exchanger Process Optimization in A Typical Brewery Plant
Authors: Mathew Shadrack Uzoma , Tamzor Lebari Aban
Published: February 2022

The research attempts to improve upon the performance efficiency of the heat exchanger network system of Pabod Brewery, Port Harcourt, Rivers State, Nigeria. It swaps the heat system of the plant by the use of Pinch Technology to recover waste heat and integrating the recovered energy for process application. The application software is Microsoft Excel and Problem Table Method was employed in the numerical analysis of data. The gross energy expenditure by the plant is 10.44MW at production capacity of 400,000 liters of beer per day. On quantitative aggregate 6.157MW goes for heating and 4.267MW for cooling. A temperature pinch or minimum approach temperature (?Tmin)of 100C was used in the pinch analysis of the heat exchangers performance. The research findings confirmed minimum heating utility of 5.04MW and cooling utility of 3.09MW. with energy upturn of 1.08MW and 1.23MW for the hot and cold flows respectively. This correlates to energy conservation of 18% for hot utility and 21% for the cold utility. The hot stream pinch temperature is 710C while that of the cold stream is 610C. Heat exchangers network configuration design were performed above and below the pinch The network designs were produced and integrated to produce improved heat exchanger network system for the Brewery plant.
Optimal Simulation and Mathematical Correlation of Mud Weight for Effective Wellbore Stability Management
Authors: Oriji Boniface A. , Okeke Raphael Odikpo
Published: February 2022

Wellbore instability is a problem that affects drilling activities. It is therefore important to provide an optimal solution that prevents or reduces the occurrence of wellbore collapse and not compromise the integrity of the well. In this study, work was done to assess the impact of several parameters including tubing pressure, tubing fluid temperature, length of tubing, gas density, liquid density, tubing hold-up and total mass flow on mass fraction of tubing muds were considered. Data points for this investigation were obtained using OLGA multiphase simulator. The results of the simulation (including the trend and plot data) were exported to MATLAB to develop a mud weight model (correlation) using the MATLAB regress function. The correlation was also validated using statistical techniques such as the R square and Significance F values. Comparison of the trend plots of the actual data points from OLGA and the predicted data points was also done to further prove the reliability of the correlation. The correlation predictions agreed with the OLGA results excellently with a relative error of less than 0.001 %. This study revealed that the tubing mud weight is significantly impacted on by variables like tubing holdup, tubing gas density, tubing liquid densities and the total mass flow. Whereas the tubing pressure, fluid temperature, and the tubing length have insignificant effects on the tubing mud weight. From the trend plots of the variables, it was deduced that as the tubing pressure increased, the temperature and the mud weight also increased. While, the total mass and volumetric flows reduced with increased tubing pressure. The effect of input data uncertainties on the developed correlation were also tested by using 22 observation points to predict tubing mud weight and calculating the resulting residual values. Over 90% of the residual values were negative and the percentage difference in mud weight between the first and the last observation points was approximately 4%. Hence, the effect of input data uncertainties on the developed correlation is insignificant. This report will serve as a template for drilling engineers, assisting them with a simple, fast and reliable technique for determining optimum drilling parameters with a lesser engineering exertion and drilling experience.
Flammability and Gravity Effect of Horizontal and Vertical Propagating Flames in Tube
Authors: Ebieto Celestine Ebieto , Nyong Oku
Published: February 2022

In the current research, experimental work is investigated for vertically and horizontally downward propagating flames in an open-ended tube. The objective was to study and compare the influence of flammability limits, gravity, and the flame speed in the different tube configuration for two different fuels. The experimental facility included a 20 mm inner diameter tube, 1200 mm in length and an optical access quartz tube made centrally of 700 mm in length. Methane-air and propane-air fuel were compared for both vertically and horizontally downward propagating flames. The flame speed at each equivalence ratios for both fuels was lower for the flame that propagates downward compared to the flame that propagates horizontally. For both fuels, the flammability limits tend to rise for the vertically downward flame. The influence of gravity was seen as the flames become leaner and richer in methane-air and propane-air flames that propagate vertically downwards, causing a transformation in the contour of the flame from a steady curved flame to a vibrating corrugated flame.
Novel System for Processing User Interfaces
Authors: Ekpar Frank Edughom
Published: February 2022

In this paper we introduce novel automatic and manual processing systems for a versatile graphical user interface comprising one or more N-dimensional background elements each of which is divided into one or more arbitrarily-shaped N-dimensional partitions, wherein each partition may contain one or more user interface elements and is associated with one or more sets of rules that define rendering, positioning, element placement and other relevant attributes and behaviors, wherein said rules can be specified in such a way as to enable said N-dimensional background to assume any desired arbitrary shape and to facilitate expansion to any desired arbitrary size without distortion or loss in quality. Our systems permit the efficient generation of intuitive graphical user interfaces in a wide variety of application domains.
General algorithm for searching user data in social media of the Internet
Authors: Mastykash Oleh , Peleshchyshyn Andii
Published: February 2022

The research work presented within this paper solves the problem of automated search for heterogeneous data in social media of the Internet (SMI). Building a system for obtaining and subsequent analysis of heterogeneous data in SMI – a complex multi-stage process in which specialists of various profiles and qualifications participate. Therefore, one of the main problems in the design of such systems is the coverage of all aspects of the functioning of the software-analytical complex, providing a common language for specialists, which allows us to uniquely, and clearly, understandably formulate the basic concepts of the projects. One of the main and basic tasks in analyzing the pages of a SMI user is to build algorithms for analyzing the user data environment (UDE). The quality of software will depend on the implemented algorithms. The construction of such algorithms, on the one hand, provides an understanding of the process of forming functional individual modules of the system and their interaction, on the other hand, laying a qualitative foundation in the future system. Algorithms for data analysis in the SMI will be designed based on the basic principles of behavior of the user registered in it.
Single Harmonic Black Holes
Authors: Vegt Wim
Published: February 2022

In this New Theory a “Single Harmonic Black Hole” (SHBH) has been considered to be the Gravitational-Electromagnetic Confinement of a Single Harmonic Electromagnetic Field Configuration in which a perfect equilibrium exists between the outward directed electromagnetic radiation pressure and the inward directed Electromagnetic-Gravitational Interaction force densities.    This frequency transformation is possible because of the combined Lorentz / Doppler-Effect transformation during the collapse (contraction) of the radiation when the Gravitational Electromagnetic Confinement has been formed (Implosion of Visible Light).  Within the scope of this article “Single Harmonic Black Hole” (SHBH) is considered to be any kind of 3-dimensional confined Single Harmonic Electromagnetic Energy. The inner structure of a “SHBH” has been based on a 3-dimensional isotropic equilibrium within the electromagnetic field configuration. This new theory will explain how electromagnetic fields (wave packages) demonstrate inertia, mass and momentum and which forces keep the wave packages together in a way that they can be measured like particles with their own specific mass and momentum. To understand what electromagnetic inertia and the corresponding electromagnetic mass, spin and electric charge is and how the anisotropy of electromagnetic mass, spin and electric charge can be explained and how it has to be defined, a New Theory about “Electromagnetic-Gravitational Interaction” has been developed. The “New Theory” has been based on the fundamental principle of “Perfect Equilibrium within the Universe” which has already been expressed by Newton’s three equations published in 1687 in “Philosophiae Naturalis Principia Mathematica. Newton’s Equations in 3 dimensions will be published in this article in an extension into 4 dimensions. Newton’s 4-dimensional law in the 3 spatial dimensions results in an improved version of the classical Maxwell Equations and Newton’s law in the 4th dimension (time) results in the quantum mechanical Schrödinger wave equation (at non-relativistic velocities) and the relativistic Dirac equation.
Effect of the Type of Curing on the Corrosion Behavior of Concrete Exposed to Urban and Marine Environment
Authors: Baltazar-Zamora Miguel Angel , Márquez-Montero Sabino , Landa-Ruiz Laura , Croche René , López-Yza Oscar
Published: February 2022

This study analyzes the electrochemical behavior of AISI 1018 steel as reinforcement in concrete exposed to the Xalapa city (urban environment) and seawater (marine environment). Two concrete mixtures were made, with ratio w/c of 0.45 and 0.65, according to the method of ACI 211.1. The specimens underwent three types of curing, the first was submerged in water for 27 days as indicated by the ONNCCE regulations, the second was cured as it is done on oeuvre (moisturizing the elements in the morning and in the afternoon) and the third one exposing to the environment (without applying water), before placing them in the exposition environment. The results of more than 340 days of monitoring of Ecorr and Icorr demonstrate that the marine environment is the most aggressive in the corrosion of reinforced concrete, with a better performance of the concrete of ratio w/c=0.45 and with a curing according to normative.