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SOFOS: Demonstrating the Challenges of Materialized View Selection on Knowledge Graphs [article]

Georgia Troullinou, Haridimos Kondylakis, Matteo Lissandrini, Davide Mottin
2021 arXiv   pre-print
Motivated by a lack of understanding of the impact of view materialization alternatives for RDF data, we demonstrate SOFOS, a system that implements and compares several cost models for view materialization  ...  Analytical queries over RDF data are becoming prominent as a result of the proliferation of knowledge graphs.  ...  DEMONSTRATION SCENARIO The goal for the demonstration is to show, through experiments, the challenges involved in materialized view selection on knowledge graphs, exploring various alternative cost models  ... 
arXiv:2103.06531v1 fatcat:a5frlwq6ezhqxbp5npth7lydeu


Michael J. Nabie, Peter Akayuure, Ussif A. Ibrahim-Bariham, Seidu Sofo
2018 Journal on Mathematics Education  
Convenience sampling technique was used to select a sample of 119 (25 females, 94 males) second year science/mathematics pre-service teachers from two Colleges of Education in the Northern Region of Ghana  ...  Trigonometry Perception Questionnaire (TPQ) and Trigonometry Assessment Test (TAT) were used to collect data on pre-service teachers' perceptions and conceptual knowledge of trigonometry.  ...  This suggests that the preservice teachers in the present study had action knowledge on the graph of trigonometric functions but lacked a process, object and schema knowledge on the graph of the sine function  ... 
doi:10.22342/jme.9.2.5261.169-182 fatcat:azf4sgu2gnfdlmx7wgcam4mura

The Influence of Instructional Design and Instructional Material on Learners' Motivation and Completion Rates of a MOOC Course

Stefanos Giasiranis, Loizos Sofos
2020 Open Journal of Social Sciences  
The motivation of the learners from the instructional material was measured using the Instructional Material Motivation Survey (IMMS) tool and showed that all the learners were highly motivated both as  ...  To determine to which extent the quality instructional material, which is the result of a good instructional design, contributes to their motivation and high rates of completion of the courses, we created  ...  Conflicts of Interest The authors declare no conflicts of interest regarding the publication of this paper.  ... 
doi:10.4236/jss.2020.811018 fatcat:n2kq3ztynvdy3oaf5rfs5vztjm

MAP-Elites Enables Powerful Stepping Stones and Diversity for Modular Robotics

Jørgen Nordmoen, Frank Veenstra, Kai Olav Ellefsen, Kyrre Glette
2021 Frontiers in Robotics and AI  
Together, these results demonstrate the suitability of MAP-elites for the challenging task of morphology-control search for modular robots, and shed light on the algorithm's capability of generating stepping  ...  and maximum performance on the locomotion task.  ...  mutation 1.0 Initial population size SOFO 200 MOFD QDSA 1000 Selection SOFO Tournament on objective(s) MOFD QDSA Tournament on curiosity Probability of morphological mutation SOFO 0.2  ... 
doi:10.3389/frobt.2021.639173 pmid:33996926 pmcid:PMC8115726 fatcat:q3qlkatyi5cztnuioo5kryagnq

MAP-Elites enables Powerful Stepping Stones and Diversity for Modular Robotics [article]

Jørgen Nordmoen, Frank Veenstra, Kai Olav Ellefsen, Kyrre Glette
2020 arXiv   pre-print
To solve this challenge we compare three different Evolutionary Algorithms on their capacity to optimize morphologies in modular robotics.  ...  In addition, we analyse the genealogical ancestry to shed light on the notion of stepping stones as key to enable high performance.  ...  ACKNOWLEDGMENTS The simulations were performed on resources provided by UNINETT Sigma2 -the National Infrastructure for High Performance Computing and Data Storage in Norway.  ... 
arXiv:2012.04375v1 fatcat:alkxy7rdfbb2xobtkjnely257i

How Mobile Augmented Reality Is Applied in Education? A Systematic Literature Review

Fabrício Herpich, Felipe Becker Nunes, Giani Petri, Liane Margarida Rockenbach Tarouco
2019 Creative Education  
Based on the selected studies, we analysed which knowledge areas the MAR approaches are used in the educational contexts. We also analysed how the approaches have been developed, and evaluated.  ...  The goal of this article is to identify the state-of-the-art on how the MAR has been used for educational purposes.  ...  Giasiranis and Sofos (2016) Giasiranis and Sofos (2017) Guazzaroni ( Conflicts of Interest The authors declare no conflicts of interest regarding the publication of this paper.  ... 
doi:10.4236/ce.2019.107115 fatcat:2eome35evrab3glw3aylxagkm4

Media education role in achieving physical education goals in Poland

Magdalena Lubońska
2021 Kultura-Społeczeństwo-Edukacja  
In the school system, necessary corrections have been introduced to the most important documents and the curricula, but there is still a lack of knowledge on what media education looks like in practice  ...  The goal remains the same but the social conditions impose a new identity – the subject teacher evolves into a media one.  ...  Each recorded activity is illustrated on a graph and analyzed for energy expenditure as well as a specific "standard" of the daily dose of activity.  ... 
doi:10.14746/kse.2021.20.18 fatcat:2y7ant5q35cdbbt6oymns6rkvu

Designing Authentic Assessments: Engaging Business Students in Flow Experience with Digital Technologies [chapter]

Viktor Arity, Gillian Vesty
2020 Tertiary Education in a Time of Change  
The graph is also useful in demonstrating the extent to which (2) The player can concentrate fully on the activity.  ...  We also generated a graph of the system data ( Fig. 3 .10) which demonstrates that students remain active before and after the due date for each of the subsequent stages.  ... 
doi:10.1007/978-981-15-5883-2_3 fatcat:waxajdkuhfek7e7qkkkftkvw2q

The Effect of Using the 5E Instructional Model on Students' Performance in and Motivation to Learn Sine Rule and its Applications

Stonals Boakye, Micheal Joseph Nabie
2022 Zenodo  
The effect of the using the 5E instructional model on students' performance in and motivation to learn sine rule and its applications.  ...  International Journal of Current Education Studies (IJCES), 1(1), 14-35  ...  The principles of the constructivism suggest that students can make sense of the materials they learn if they are actively involved and act based on their experiences.  ... 
doi:10.5281/zenodo.6625280 fatcat:czxh4uyqlbbh5ak5gpsgk6jut4

Review: optical fiber sensors for civil engineering applications

Christopher K. Y. Leung, Kai Tai Wan, Daniele Inaudi, Xiaoyi Bao, Wolfgang Habel, Zhi Zhou, Jinping Ou, Masoud Ghandehari, Hwai Chung Wu, Michio Imai
2013 Materials and Structures  
Then, the applications of OFS in highway structures, building structures, geotechnical structures, pipelines as well as cables monitoring are described, with focus on sensor design, installation technique  ...  It is believed that the State-ofthe-Art review is helpful to engineers considering the use of OFS in their projects, and can facilitate the wider application of OFS technologies in construction industry  ...  view Fig. 24 Long-gauge SOFO interferometers on the vault of San Vigilio church systems to provide valuable information and accurate knowledge of the structural behavior for the development of proper  ... 
doi:10.1617/s11527-013-0201-7 fatcat:wv2vanhqdjfejfip3xjbysee4u

Collaborative Cloud Land Surveying: A VGI-Based approach to Practice and Education in Surveying Engineering [article]

Ioannis Sofos, National Technological University Of Athens, National Technological University Of Athens
Special thanks to Christos Sofos (plus family) for all kinds of support in the last 35 years.  ...  It is in this context that I spent a big part of my life studying initially and researching on the sequence, the fundamental concepts of space and time.  ...  The sidebar on the left is used to view data of selected properties and set attributes (e.g. state, description, and other info).  ... 
doi:10.26240/heal.ntua.2581 fatcat:fqfhpmacyfcu3oy6nxpujeszva

A Microbial Assessment Scheme to measure microbial performance of Food Safety Management Systems

L. Jacxsens, J. Kussaga, P.A. Luning, M. Van der Spiegel, F. Devlieghere, M. Uyttendaele
2009 Journal of food microbiology  
One of the most emerging challenges is to assess the performance of a present FSMS.  ...  The MAS is a procedure that defines the identification of critical sampling locations, the selection of microbiological parameters, the assessment of sampling frequency, the selection of sampling method  ...  Acknowledgments The research performed has been part of the project FOOD-CT-2005-007081 (PathogenCombat) supported by the European  ... 
doi:10.1016/j.ijfoodmicro.2009.02.018 pmid:19327860 fatcat:gvekebge3ncx3oigiyui464ivi

IRRODL Volume 15, Number 4

Various Authors
2014 International Review of Research in Open and Distance Learning  
The views of students on their social networking experience in a learning management system is the subject of Özmen and Atici's qualitative research paper.  ...  Research findings include data on teachers' motivation, frequency of more than one prescribed textbook per course, teachers' awareness of costs, the average cost of textbooks, teachers' awareness and use  ...  We would like to acknowledge the care and input of the reviewers, as well as the financial support to one of the researchers by the South African National Research Foundation.  ... 
doi:10.19173/irrodl.v15i4.1989 fatcat:n6eco2dbjjbdpk5buikozdjrf4

Methodologies for model-free data interpretation of civil engineering structures

Daniele Posenato, Prakash Kripakaran, Daniele Inaudi, Ian F.C. Smith
2010 Computers & structures  
Structural Health Monitoring (SHM) has the potential to provide quantitative and reliable data on the real condition of structures, observe the evolution of their behaviour and detect degradation.  ...  Methodologies are then validated on two full-scale structures. The results show the ability of the methodology to identify abrupt permanent changes in behavior.  ...  The authors are grateful to Akhilesh Gupta, Francesca Lanata and Branko Glišić for their contributions.  ... 
doi:10.1016/j.compstruc.2010.01.001 fatcat:bbzrwrm5x5h3viegit3kisgl5i

Anthropogenic marine debris and its dynamics across peri-urban and urban mangroves on Penang Island, Malaysia [article]

Su Yin Chee, John Barry Gallagher, Jean Chai Yee, Danielle Carey, Yusri Yusup
2019 biorxiv/medrxiv   pre-print
The findings show that mangrove areas are vulnerable to a constant build of potentially harmful debris with selective leakage and sorting of materials back to the water body closer to their coastal edges  ...  Mangroves act as sinks to a variety of anthropogenic marine debris (AMD) forms. However, knowledge of their distribution and accumulation dynamics is limited.  ...  points of view.  ... 
doi:10.1101/756106 fatcat:m6oy4besircffmdhmffppw6yra
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