Article
Engineering, Manufacturing
Li Wang, Yi Liu, Yu Yang, Yanfeng Li, Mingke Bai
Summary: This study explores the application of 3D concrete printing in compressed structural systems with low tensile/shear stresses, designing four different interlocking configurations. By investigating the effects of different interlocking forms on the interfacial connection strength at the joints, a proposal for constructing large-scale concrete arch structures through the modular assembly of 3D-printed segments is provided.
ADDITIVE MANUFACTURING
(2021)
Article
Education & Educational Research
Nathan Garrett
Summary: The study shows the importance of providing users with the ability to control the pacing of instruction, and the need to test educational theories when applying them in new contexts.
BRITISH JOURNAL OF EDUCATIONAL TECHNOLOGY
(2021)
Article
Construction & Building Technology
Shahram Ghasemi, Mohammad Reza Nikudel, Ahmad Zalooli, Mashalah Khamehchiyan, Abbas Alizadeh, Fahimeh Yousefvand, Amir Maziyar Raeis Ghasemi
Summary: Aggregates play a crucial role in concrete's strength and durability. This study explores the impact of different aggregates on the properties of Portland concrete (PC) and sulfur concrete (SC). It was found that SC has higher strength and durability compared to PC. Coquina, with its high porosity, allows SC to penetrate pores and induce better adhesion, making it a stronger option than limestone and travertine. Furthermore, SC made with coquina exhibits the highest resistance to aging tests and marine environments.
JOURNAL OF MATERIALS IN CIVIL ENGINEERING
(2022)
Article
Engineering, Mechanical
Tomasz Malatynski, Szymon Duda, Bartosz Babiarczuk, Joanna Warycha, Pawel Zielonka, Grzegorz Lesiuk
Summary: This study evaluates the degradation mechanisms of composite bars in various chemical environments and analyzes the performance and damage mechanisms through compression, tensile, and bending tests.
ENGINEERING FAILURE ANALYSIS
(2022)
Article
Construction & Building Technology
Andrea Carigi, Simone Saltarin, Alfio Di Giovanni, Carmine Todaro, Daniele Peila
Summary: This paper presents a comparative test campaign between concrete produced with clean aggregate and aggregate treated with surfactants. The results show that the presence of surfactants significantly reduces the compressive strength (up to 41 %), the elastic moduli (up to 25 %), and the specific weight (up to 7 %) of the concrete.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2023)
Article
Computer Science, Interdisciplinary Applications
Hans van der Meij, Karlygash Nuketayeva
Summary: The study examined the use of video-based tutorials for software training and compared the effectiveness of three different practice schedules. Participants watched the tutorials and engaged in task practice, specifically focusing on advanced formatting tasks for Word. The results showed that the practice schedule did not affect video processing measures, but self-efficacy development was positive and significant. The hybrid practice schedule was found to be more effective for untrained items. Additionally, effectiveness judgments were favorable for all three conditions, and both conceptual and procedural knowledge development was significant.
COMPUTERS & EDUCATION
(2023)
Article
Construction & Building Technology
Gan Sun, Nan Yan, Xiaoyu Bai, Junwei Liu, Dongshuai Hou, Songkui Sang, Mingyi Zhang, Pan Wang, Desheng Jing
Summary: In this study, the influence of anchorage length and anchorage mode on the bonding property of GFRP bolt and concrete was investigated. The mechanical properties and stress mechanism of the GFRP bolt were analyzed through tensile tests. The results showed that the failure modes of GFRP anti-floating anchor were pull-out failure and fracture failure. The load-displacement curve of the anchor in the form of mechanical anchorage was smoother with increased anchorage length, and the main load bearing mode changed from interface friction force and chemical adhesive force to mechanical bite force.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Food Science & Technology
Kathryn Colla, Russell Keast, Mohammadreza Mohebbi, Catherine G. Russell, Djin Gie Liem
Summary: This study aimed to investigate the consistency of sense of presence, liking, beverage desire, consumption, and choice in immersive environments compared to real-life settings. The results showed that sense of presence significantly increased in immersive environments, and liking measures were consistent with those in the laboratory. However, measuring apple juice liking under controlled laboratory conditions was not suitable and should be done under more realistic contexts.
FOOD QUALITY AND PREFERENCE
(2023)
Article
Psychology, Multidisciplinary
Bayu Suseno, Thomas Dicky Hastjarjo
Summary: Stress is a common problem for physical and psychological health, and exposure to natural environments can help reduce stress. Real and simulated natural environments have a restorative effect on stress reduction. This study aimed to compare the effects of simulated natural environments in virtual reality and 2D video on stress reduction. The results showed that both virtual reality and 2D video reduced stress, but there was no significant difference between the two methods.
FRONTIERS IN PSYCHOLOGY
(2023)
Article
Chemistry, Physical
Chunbao Li, Gaojie Li, Liang Zheng, Xiaohui Liu, Shen Li, Xukai Wang, Valentina Y. Soloveva, Hojiboev Dalerjon, Zhiguang Fan, Pengju Qin
Summary: This study investigates the mechanical properties of perforated steel plate reinforced concrete through compression and pull-out tests, and simulates the behavior using finite element software. The results demonstrate that the thickness, hole diameter, and hole spacing significantly affect the compressive strength and ultimate bearing capacity. Optimal solutions are determined for both parameters.
Article
Construction & Building Technology
Vahab Sarfarazi, Kaveh Asgari, Shirin Jahanmiri, Mohammad Fatehi Marji, Alireza Mohammadi Khachakini
Summary: This study investigated the interaction between a notch and a micropore under uniaxial compression through computational and experimental methods. The results showed that the failure pattern affects the compressive strength, while the orientation of the notch and the condition of the pore impact the failure pattern formation. The numerical simulation and actual test results exhibited similar failure strengths.
ADVANCES IN CONCRETE CONSTRUCTION
(2022)
Article
Construction & Building Technology
Yong Feng, Zijuan Niu, Chen Zhao, Lijuan Li
Summary: The mechanical properties of PVA-fiber-reinforced rubber concrete were investigated by conducting uniaxial compression full curve tests on 13 groups of specimens with different PVA volume fractions and rubber particle replacement ratios. The results show that the presence of PVA and rubber particles improves the compressive properties of the concrete and exhibits ductile characteristics upon failure. Additionally, PVA has a significant impact on the bearing capacity, crack propagation, and compressive strength of rubber concrete. A meso-numerical model was developed to simulate the behavior of the concrete, and the simulation results aligned well with the experimental results, validating the model's effectiveness for structural analysis and design.
Article
Chemistry, Analytical
Luigi Capozzoli, Giacomo Fornasari, Valeria Giampaolo, Gregory De Martino, Enzo Rizzo
Summary: This study aimed to improve the monitoring and characterization of civil structures using non-destructive testing methods such as ground penetrating radar and electrical resistivity tomography. Results showed the effectiveness and limitations of these methods, which are crucial for civil engineering applications. The study also introduced a new approach based on cross-hole electrical resistivity tomography, aiming to reduce uncertainties in engineering structure monitoring.
Article
Construction & Building Technology
Joao Miguel Peres Medeiros, Luigi Di Sarno
Summary: This paper proposes a new construction paradigm that utilizes low-carbon concrete and a bacterial self-healing agent to reduce carbon emissions and enhance the mechanical properties of the structure. The experiments conducted demonstrate that replacing Ordinary Portland Cement (OPC) with Ground Granulated Blast-furnace Slag (GGBS) in the early curing stages of concrete results in lower compressive capacity, but shows the potential for significant improvement after 28 days. This study suggests that using GGBS as a replacement for OPC is viable for structures that do not require high compressive values in the early curing stages, offering both environmental and performance benefits.
Article
Polymer Science
Shengyong Xia, Haiqing Liu, Guosheng Fu, Jinyang Zhang, Ming Lei, Zimu Chen
Summary: The study showed that the thickness of the GFRP tube has a significant effect on mechanical properties, and the fiber volume fraction significantly increases the strain of the short column. The research results are helpful in designing concrete structures more suitable for construction engineering.
Article
Computer Science, Interdisciplinary Applications
Diego Vergara, Alvaro Anton-Sancho, Pablo Fernandez-Arias
Summary: This article investigates the use of digital learning environments in higher education and proposes design methodologies, such as gamification, tailored for computer-based learning. The effectiveness of gamification relies on the adaptation to the player's profile. Four player profiles (Explorer, Killer, Socialized, and Achiever) are established based on the Bartle classification. The study reveals that most engineering professors are Explorers, which is considered the best player profile for learning, but there is a gap between their own profile and the choice of the most effective one. The findings also indicate differences in player profiles based on gender, age, teaching experience, and university tenure.
COMPUTER APPLICATIONS IN ENGINEERING EDUCATION
(2023)
Article
Education & Educational Research
Jose-Louis Iparraguirre, Alvaro Anton-Sancho, Diego Vergara
Summary: This study explores the attendance of face-to-face lectures and the implementation of new learning methodologies among economics and business students in Egypt. The findings indicate that students value classroom attendance as an important element of their learning, but also identify some disadvantages. It is suggested that further research should compare the results with other geographical areas, and universities should adopt measures, such as teacher training, to increase the adoption of new learning methodologies.
EDUCATION SCIENCES
(2023)
Article
Education & Educational Research
Luis Miguel Arroyave-Espinosa, Alvaro Anton-Sancho, Edwan Anderson Ariza-Echeverri, Diego Vergara
Summary: This study conducts exploratory quantitative research on the opinions of students in a secondary technical education course on the use of PDF-3D in teaching Geometry of Welded Joints. The results show that students highly value the virtual tool PDF-3D, particularly in terms of motivation and ease of use. The importance students place on the ease of solving spatial comprehension difficulties in welded joints positively influences their ratings of this educational technology. Furthermore, the study reveals a preference for a mixed teaching methodology with a greater presence of virtual resources compared to traditional lectures. The results suggest the need for specific training on the didactic use of PDF-3D for technical education instructors due to their lack of knowledge on its potential in education.
EDUCATION SCIENCES
(2023)
Article
Engineering, Multidisciplinary
Jana Fernandez-Gutierrez, Pablo Fernandez-Arias, Diego Vergara, Alvaro Anton-Sancho
Summary: In order to reduce fuel consumption, a channeling system is designed to utilize the force of air itself to propel vehicles. The design includes a deflector that collects the air impacting the vehicle at the front and transfers it to the rear, eliminating the vacuum zone and significantly increasing the pressures, including negative pressures. Experimental wind tunnel tests have been conducted to demonstrate the effectiveness of the deflector in eliminating vacuum and obtaining positive pressure.
Article
Education, Scientific Disciplines
Pablo Fernandez-Arias, Alvaro Anton-Sancho, Amelia Barrientos-Fernandez, Diego Vergara-Rodriguez
Summary: The importance of soft skills in engineering work is increasing, especially in the digital age accelerated by Covid-19. Engineering professors need to possess both technical and transversal skills in order to foster these skills in future engineers. This article examines the evaluation of soft skills by a group of Latin American engineering professors, highlighting gender gaps in work behavior and social skills, with a wider gap observed in the social skills category among younger and older participants. Additionally, females tend to rate their work motivation skills higher, except for the 55-64 age range.
IEEE TRANSACTIONS ON EDUCATION
(2023)
Article
Materials Science, Multidisciplinary
Jesus Toribio, Miguel Lorenzo
Summary: The effects of the skin pass technique on the residual stress and plastic strain fields in cold drawn pearlitic steel wires are analyzed in this study. The goal is to find optimal conditions for manufacturing more reliable structural components by reducing the main cause of failure, hydrogen embrittlement. Numerical simulations using finite elements and considering different drawing dies and reduction ratios were performed to estimate the hydrogen distributions. Results showed that the reduction ratio is a key parameter in reducing the drawing-induced residual stress, and the use of modified drawing dies with a skin pass zone can lead to lower hydrogen accumulation in the prospective damage zone.
Article
Chemistry, Multidisciplinary
Eulalia Izard, Roberto Garcia-Martin, Manuel Rodriguez-Martin, Miguel Lorenzo
Summary: This paper investigates the influence of geometric parameters of a shrink fit with chamfer hubs using finite element analysis to determine the optimal dimensions for the design of this mechanical assembly. The results show that stress concentrations can be reduced by using full-chamfer hubs with chamfer angles within the range of 13 degrees-15 degrees or partial-chamfer hubs with a chamfer height of half the hub thickness and chamfer angles within the same range. By following these design recommendations, the real stress state can be accurately estimated without underestimation.
APPLIED SCIENCES-BASEL
(2023)
Article
Engineering, Chemical
Pino P. Alvarez-Castellanos, Pablo Fernandez-Arias, Diego Vergara, Francisco J. San-Jose
Summary: The chemical industry produces a wide range of products, including plastics, chemical fibers, rubber, perfumes and cosmetics, and cleaning products. While the safety level is generally high, the use of hazardous substances increases the risk of accidents and endangers workers' safety. In the case of softener production, isopropanol and dimethyl sulfate have been identified as the main causes of accidents. This study uses the Maciejasz Index to analyze the thermal reactivity of these substances and finds that combinations of nickel and other liquid substances are not reactive enough to cause spontaneous combustion.
Article
Computer Science, Information Systems
Alvaro Anton-Sancho, Pablo Fernandez-Arias, Diego Vergara
Summary: This study conducts a descriptive quantitative research on the evaluations of virtual reality (VR) technology used as a didactic tool by 712 university professors in Mexico. A validated Likert-type questionnaire was utilized as an instrument and the responses were statistically analyzed. The findings show that Mexican professors have low levels of digital skills but hold high valuations of VR. These valuations are strongly dependent on the professors' area of knowledge. Engineering professors value VR more highly than Humanities professors. There are also gender and digital generation gaps in the evaluations, with different behaviors based on the area of knowledge. Consequently, recommendations are provided to mitigate the identified gaps.
Article
Education & Educational Research
Maria Nieto-Sobrino, David Diaz, Montfrague Garcia-Mateos, Alvaro Anton-Sancho, Diego Vergara
Summary: In this study, quantitative research was conducted on the incidence of bullying attitudes among primary and secondary school students in a sparsely populated area in Spain. Data was collected from a standardized test called AVE test, which was administered to a sample of 129 students between 9 and 15 years old. The results showed that almost a quarter of the participants were at risk of being bullied, indicating a lower bullying rate compared to the national average in sparsely populated areas. Additionally, there were significant gender gaps in terms of the type and incidence of bullying, highlighting differences in behaviors between men and women.
EDUCATION SCIENCES
(2023)
Article
Psychology, Multidisciplinary
Alvaro Anton-Sancho, Diego Vergara, Maria Sanchez-Calvo, Pablo Fernandez-Arias
Summary: This paper conducts quantitative research to analyze the levels of stress generated in Latin American professors due to the rapid digitalization of higher education resulting from the COVID-19 pandemic. The study focuses on the differences in digital stress between professors from private and public universities. A validated questionnaire was used to collect responses from 750 professors from 20 Latin American countries, and the data was statistically analyzed. The results indicate that there are no significant differences in the average levels of digital stress between professors from private and public universities. However, the impact of this digital stress on Latin American professors varies according to gender and age, depending on their university tenure. Therefore, the paper presents implications and recommendations based on the findings.
BEHAVIORAL SCIENCES
(2023)
Article
Computer Science, Artificial Intelligence
Alvaro Anton-Sancho, Pablo Fernandez-Arias, Diego Vergara
Summary: In this paper, we conducted descriptive quantitative research on the assessment of VR technologies in higher education in the countries of the PA. Differences between PA countries in terms of perceptions of VR and the gaps in gender and knowledge areas were analyzed. The results show that PA professors have high ratings of VR but have concerns about its use in lectures, and low self-concept of their digital competence. Recommendations are given for promoting a homogeneous process of VR integration in higher education in the PA countries.
MULTIMODAL TECHNOLOGIES AND INTERACTION
(2023)
Review
Energy & Fuels
Pablo Fernandez-Arias, Diego Vergara, Alvaro Anton-Sancho
Summary: Given the problem of climate change and the need to reduce greenhouse gas emissions, nuclear energy can be seen as a viable technological option. The development of Small Modular Reactor (SMR) technology demonstrates a focus on reducing construction costs and promoting economic efficiency. This paper presents a technical summary of PWR-SMR design based on a bibliometric review and technical analysis, showing increasing interest and advancements in research on PWR reactors integrated within SMR designs.
Article
Psychology, Clinical
Maria-Luz Fernandez-Alfaraz, Maria Nieto-Sobrino, Alvaro Anton-Sancho, Diego Vergara
Summary: This research conducts quantitative research on the perception of early childhood education teachers and child psychologists regarding bullying behaviors in early childhood education (3 to 6 years old) and their knowledge and experience in this area. Two questionnaires were used, each for one of the two professional groups analyzed, and their answers were statistically analyzed. The results show that early childhood education teachers express inadequate training in school bullying and have little experience in its detection and treatment. Moreover, the teachers' perception of bullying in their own schools is not realistic and differs from their knowledge of bullying behavior in other schools. The assessments held by psychologists differ significantly from those of teachers, mainly in the identification of the origin of bullying.
EUROPEAN JOURNAL OF INVESTIGATION IN HEALTH PSYCHOLOGY AND EDUCATION
(2023)
Proceedings Paper
Computer Science, Information Systems
Alvaro Anton-Sancho, Diego Vergara-Rodriguez, David G. Calatayud, Pablo Fernandez-Arias
Summary: This paper presents a quantitative research on Spanish professors' perception of the didactic use of virtual reality in higher education classrooms. The study involved 36 Spanish university professors with no previous experience in virtual reality. The results show that the training positively increased the participants' perception of all aspects of virtual reality studied, with males and older professors showing a greater increase in their assessment of the technical aspects.
PERVASIVE COMPUTING AND SOCIAL NETWORKING, ICPCSN 2022
(2023)
