David Pérez López - Academia.edu (original) (raw)
Papers by David Pérez López
Computers in Industry, 2021
Strategies for design reuse play a fundamental role in the development of products that change an... more Strategies for design reuse play a fundamental role in the development of products that change and evolve over time. Design changes often involve modifications in the geometry of parts and assemblies, which are driven by changes in the digital representation of the product, i.e. the procedural and parametric CAD model. Consequently, constraint redundancies in the twodimensional profiles that build the parametric model can significantly hinder alterability and reusability. This paper argues that constraint redundancy conditions are not solely a computational problem but a more complex issue that involves the interaction with the sketch throughout the modeling process and the modeling scheme used to convey a specific design intent. We analyze a representative group of 3D MCAD systems and the interaction with their corresponding geometric kernels and Geometric Constraint Solvers (GCS) to determine how constraint redundancy is managed at the profile level. Next, we report the results of a series of experiments to evaluate the influence of redundant constraints on model editing and reusability tasks and describe the development of a new software tool for identifying and parsing constraint redundancy conditions. We conclude that constraint redundancy in profiles significantly and unnecessarily compromises model conciseness, robustness, and the overall model quality, which negatively affects user productivity and downstream processes. The implications of constraint redundancy conditions for CAD training are emphasized. Our experiments also demonstrate the value of our parsing tool to assist users in maximizing model reuse (by removing redundancies) and the communication of design intent (by proposing an optimal set of non-redundant constraints), but further development is necessary to use it as a practical tool for engineering analysis.
International Journal of Information Management, 2017
As CAD models continue to become more critical information sources in the product's lifecycle, it... more As CAD models continue to become more critical information sources in the product's lifecycle, it is necessary to develop efficient mechanisms to store, retrieve, and manage larger volumes of increasingly complex data. Because of their unique characteristics, 3D annotations can be used to embed design and manufacturing information directly into a CAD model, which makes models effective vehicles to describe aspects of the geometry or provide additional information that can be connected to a particular geometric element. However, access to this information is often limited, difficult, and even unavailable to external applications. As model complexity and volume of information continue to increase, new and more powerful methods to interrogate these annotations are needed. In this paper, we demonstrate how 3D annotations can be effectively structured and integrated into a Product Lifecycle Management (PLM) system to provide a cohesive view of product-related information in a design environment. We present a strategy to organize and manage annotation information which is stored internally in a CAD model, and make it fully available through the PLM. Our method involves a dual representation of 3D annotations with enhanced data structures that provides shared and easy access to the information. We describe the architecture of a system which includes a software component for the CAD environment and a module that integrates with the PLM server. We validate our approach through a software prototype that uses a parametric modeling application and two commercial PLM packages with distinct data models.
Volume 3: Manufacturing Equipment and Systems
Digital product data quality has proven to be a unifying theme in designing and reusing efficient... more Digital product data quality has proven to be a unifying theme in designing and reusing efficient products, particularly in the context of the Model-Based Enterprise (MBE). More specifically, the quality of the master model (usually a history-based parametric model) is critical, as it determines the quality of all secondary models used in subsequent downstream processes. However, no quantitative metrics exist that can provide a reliable assessment of quality at a high semantic level. In this paper, we introduce dimensional variability as a quality indicator for parametric models that connects the effective variability range of the dimensional constraints in a model to the robustness and flexibility of the parametric geometry, which determines its reusability. As a validation effort, we report the results of a study where a set of parametric models of varying complexity was analyzed, and discuss the significance of the links between the proposed metric and various aspects of the inte...
International Journal of Technology and Design Education
In order to be reusable, history-based feature-based parametric CAD models must reliably allow fo... more In order to be reusable, history-based feature-based parametric CAD models must reliably allow for modifications while maintaining their original design intent. In this paper, we demonstrate that relations that fix the location of geometric entities relative to the reference system produce inflexible profiles that reduce model reusability. We present the results of an experiment where novice students and expert CAD users performed a series of modifications in different versions of the same 2D profile, each defined with an increasingly higher number of fix geometric constraints. Results show that the amount of fix constraints in a 2D profile correlates with the time required to complete reusability tasks, i.e., the higher the number of fix constraints in a 2D profile, the less flexible and adaptable the profile becomes to changes. In addition, a pilot software tool to automatically track this type of constraints was developed and tested. Results suggest that the detection of fix constraint overuse may result in a new metric to assess poor quality models with low reusability. The tool provides immediate feedback for preventing high semantic level quality errors, and assistance to CAD users. Finally, suggestions are introduced on how to convert fix constraints in 2D profiles into a negative metric of 3D model quality.
Lecture Notes in Computer Science, 2013
Springer International Publishing AG, Cham (hereinafter called Springer) has the exclusive, sole,... more Springer International Publishing AG, Cham (hereinafter called Springer) has the exclusive, sole, permanent, worldwide , transferable, sub-licensable and unlimited right to reproduce, publish, distribute, transmit, make available or otherwise communicate to the public, translate, publicly perform, archive, store, lease or lend and sell the Contribution or parts thereof individually or together with other works in any language, in all revisions and versions (including soft cover, book club and collected editions, anthologies, advance printing, reprints or print to order, microfilm editions, audiograms and videograms), in all forms and media of expression including in electronic form (including offline and online use, push or pull technologies, use in databases and networks for display, print and storing on any and all stationary or portable end-user devices, e.g. text readers, audio, video or interactive devices, and for use in multimedia or interactive versions as well as for the display or transmission of the Contribution or parts thereof in data networks or seach engines), in whole, in part or in abridged form, in each case as now known or developed in the future, including the right to grant further timelimited or permanent rights. For the purposes of use in electronic forms, Springer may adjust the Contribution to the respective form of use and include links or otherwise combine it with other works. For the avoidance of doubt, Springer has the right to permit others to use individual illustrations and may use the Contribution for advertising purposes. The copyright of the Contribution will be held in the name of Springer. Springer may take, either in its own name or in that of copyright holder, any necessary steps to protect these rights against infringement by third parties. It will have the copyright notice inserted into all editions of the Contribution according to the provisions of the Universal Copyright Convention (UCC) and dutifully take care of all formalities in this connection in the name of the copyright holder.
Lecture Notes in Computer Science, 2013
Springer International Publishing AG, Cham (hereinafter called Springer) has the exclusive, sole,... more Springer International Publishing AG, Cham (hereinafter called Springer) has the exclusive, sole, permanent, worldwide , transferable, sub-licensable and unlimited right to reproduce, publish, distribute, transmit, make available or otherwise communicate to the public, translate, publicly perform, archive, store, lease or lend and sell the Contribution or parts thereof individually or together with other works in any language, in all revisions and versions (including soft cover, book club and collected editions, anthologies, advance printing, reprints or print to order, microfilm editions, audiograms and videograms), in all forms and media of expression including in electronic form (including offline and online use, push or pull technologies, use in databases and networks for display, print and storing on any and all stationary or portable end-user devices, e.g. text readers, audio, video or interactive devices, and for use in multimedia or interactive versions as well as for the display or transmission of the Contribution or parts thereof in data networks or search engines), in whole, in part or in abridged form, in each case as now known or developed in the future, including the right to grant further timelimited or permanent rights. For the purposes of use in electronic forms, Springer may adjust the Contribution to the respective form of use and include links or otherwise combine it with other works. For the avoidance of doubt, Springer has the right to permit others to use individual illustrations and may use the Contribution for advertising purposes. The copyright of the Contribution will be held in the name of Springer. Springer may take, either in its own name or in that of copyright holder, any necessary steps to protect these rights against infringement by third parties. It will have the copyright notice inserted into all editions of the Contribution according to the provisions of the Universal Copyright Convention (UCC) and dutifully take care of all formalities in this connection in the name of the copyright holder.
Early education is a key element for the future success of students in the education system. This... more Early education is a key element for the future success of students in the education system. This work analyzes the feasibility of using augmented reality contents with preschool students (four and five years old) as a tool for improving their learning process. A quasi experimental design based on a nonequivalent groups posttest-only design was used. A didactic unit has been developed around the topic "animals" by the participant teachers. The control group followed all the didactic activities defined in the developed didactic materials, while the experimental group was provided in addition with some augmented reality contents. Results show improved learning outcomes in the experimental group with respect to the control group.
Salvador-Herranz et al., A distributed collaborative learning tool based on a conceptual map para... more Salvador-Herranz et al., A distributed collaborative learning tool based on a conceptual map paradigm and natural interfaces applied to the case of product design studies
This paper presents a study to analyze the use of augmented reality (AR) for delivering multimedi... more This paper presents a study to analyze the use of augmented reality (AR) for delivering multimedia content to support the teaching and learning process of the digestive and circulatory systems at the primary school level, and its impact on knowledge retention. Our AR application combines oral explanations and 3D models and animations of anatomical structures. A validation study was conducted with fourth grade students in order to evaluate the effect of our tool on knowledge retention. In this study, we attempt to verify whether students using the AR application retained more concepts that those learning the topic in a traditional setting. Results show an increased knowledge retention on students using AR multimedia contents as opposed to those following a traditional course, which validates AR technology as a promising tool to improve students' motivation and interest, and to support the learning and teaching process in educational contexts.
2013 46th Hawaii International Conference on System Sciences, 2013
Augmented Reality (AR) offers many opportunities as an interactive tool to improve learning and t... more Augmented Reality (AR) offers many opportunities as an interactive tool to improve learning and teaching processes. This paper presents a pilot study conducted on third graders where a series of AR contents about Natural and Social Sciences have been used as a teaching tool. The main objective of the application is to help the students to learn complex concepts that present a difficult understanding. A user centered approach was followed to create the AR contents, where several teachers collaborated on its definition. The AR application combines 3D models and animations, mini games and quizzes. An evaluation of the educational contents was made from the point of view efficiency (academic achievement), usability and motivation. Results confirm that the use of desktop AR has had a positive impact on the learning and teaching process and reinforce the vision of AR as an affordable and feasible technological tool to support the students' learning activities.
Lecture Notes in Computer Science, 2014
Springer International Publishing AG, Cham (hereinafter called Springer) has the exclusive, sole,... more Springer International Publishing AG, Cham (hereinafter called Springer) has the exclusive, sole, permanent, worldwide , transferable, sub-licensable and unlimited right to reproduce, publish, distribute, transmit, make available or otherwise communicate to the public, translate, publicly perform, archive, store, lease or lend and sell the Contribution or parts thereof individually or together with other works in any language, in all revisions and versions (including soft cover, book club and collected editions, anthologies, advance printing, reprints or print to order, microfilm editions, audiograms and videograms), in all forms and media of expression including in electronic form (including offline and online use, push or pull technologies, use in databases and networks for display, print and storing on any and all stationary or portable end-user devices, e.g. text readers, audio, video or interactive devices, and for use in multimedia or interactive versions as well as for the display or transmission of the Contribution or parts thereof in data networks or seach engines), in whole, in part or in abridged form, in each case as now known or developed in the future, including the right to grant further time-limited or permanent rights. For the purposes of use in electronic forms, Springer may adjust the Contribution to the respective form of use and include links or otherwise combine it with other works. For the avoidance of doubt, Springer has the right to permit others to use individual illustrations and may use the Contribution for advertising purposes. The copyright of the Contribution will be held in the name of Springer. Springer may take, either in its own name or in that of copyright holder, any necessary steps to protect these rights against infringement by third parties. It will have the copyright notice inserted into all editions of the Contribution according to the provisions of the Universal Copyright Convention (UCC) and dutifully take care of all formalities in this connection in the name of the copyright holder.
Proceedings of the International Conference on Advances in Computer Enterntainment Technology - ACE '09, 2009
The objective of this study is to present the E-Junior application: a serious virtual world (SVW)... more The objective of this study is to present the E-Junior application: a serious virtual world (SVW) for teaching children natural science and ecology. E-Junior was designed according to pedagogical theories and curricular objectives in order to help students learn about the Mediterranean Sea and its ecological issues while playing. In this paper, we present the technical description of E-Junior and
Proceedings - 10th IEEE International Conference on Advanced Learning Technologies, ICALT 2010, 2010
Augmented reality provides solutions and benefits in many areas of knowledge. In the field of edu... more Augmented reality provides solutions and benefits in many areas of knowledge. In the field of education, we can apply this technology for learning contents and for developing skills in an engaging way. Engineering educators are aware of the need for spatial vision skills in order to project and interpret drawings and plans. We propose an educational kit for use at university-level with contents based on engineering graphics. Preliminary results of a validation study with first year Mechanical Engineering students indicate that this augmented reality training has a positive impact on students' spatial ability and learning for basic engineering graphics contents.
Studies in health technology and informatics, 2012
The aim of this paper is to present digital representations of humans (i.e., avatars) that look l... more The aim of this paper is to present digital representations of humans (i.e., avatars) that look like the self, applied to the Mental Health (MH) field. Virtual Representations of the Self (VRS) are in our opinion a tool with a great potential for engaging teenagers in emotional regulation strategies learning and an excellent example of new technology application to the basic concept in psychology field such as Bandura's modeling [1]. VRSs have already demonstrated their potential on human behavior modification (e.g. modification of physical activity; eating habits) in general population [2]. Thus, the same technology can bring in our opinion a lot to the Mental Health field, especially in emotional regulation learning. This paper presents a theoretical background and describes the methodology that we plan to apply in order to validate the efficacy of VRSs in clinical settings. Also, the implications of such technology and future research lines are discussed.
Procedia Computer Science, 2013
Parental influence on children's development is commonly accepted as essential, while the way how... more Parental influence on children's development is commonly accepted as essential, while the way how parents affect preschool students' information and communication technology (ICT) use at school needs a further exploration. This exploratory study is aimed to contribute to a better understanding of parental influence on children's Augmented Reality (AR) use at preschool education by analyzing interview data collected from parents whose children have worked at school with both; AR didactical resources and traditional didactical resources. The study identified and organized parent´s perspective into five components: motivation, knowledge, reading and writing, creativity and degree of satisfaction. The relationships among these components were often complex with intriguing similarities and differences among the participants. According to parents, the findings suggest that there are a lot of benefits in using a technological competitive tool based on AR: the integration of several components in order to achieve a common goal, the possibility of managing the execution of the exercises in several contexts, or the system availability.
Multimedia Tools and Applications, 2012
Abstract In this paper, a computer vision based interactive multi-touch tabletop system called Hu... more Abstract In this paper, a computer vision based interactive multi-touch tabletop system called HumanTop is introduced. HumanTop implements a stereo camera vision subsystem which allows not only an accurate fingertip tracking algorithm but also a precise touch-over-the-working surface detection method. Based on a pair of visible spectra cameras, a novel synchronization circuit makes the camera caption and the image projection independent from each other, providing the minimum basis for the development of computer vision ...
New Achievements in Technology Education and Development, Mar 1, 2010
Nowadays, our educational institutions are frustratingly outmoded in terms of teaching students. ... more Nowadays, our educational institutions are frustratingly outmoded in terms of teaching students. The entire process of giving lectures, taking notes, reading facts from books, and taking final exams is a throwback to institutions of learning dating back to the Renaissance. Remarkably, very little has changed today: with notable exceptions, the vast majority of university professors continue to bore students with ineffective, non-interactive approaches to education that result in little more than the professor's notes becoming the students' ...
Computers in Industry, 2021
Strategies for design reuse play a fundamental role in the development of products that change an... more Strategies for design reuse play a fundamental role in the development of products that change and evolve over time. Design changes often involve modifications in the geometry of parts and assemblies, which are driven by changes in the digital representation of the product, i.e. the procedural and parametric CAD model. Consequently, constraint redundancies in the twodimensional profiles that build the parametric model can significantly hinder alterability and reusability. This paper argues that constraint redundancy conditions are not solely a computational problem but a more complex issue that involves the interaction with the sketch throughout the modeling process and the modeling scheme used to convey a specific design intent. We analyze a representative group of 3D MCAD systems and the interaction with their corresponding geometric kernels and Geometric Constraint Solvers (GCS) to determine how constraint redundancy is managed at the profile level. Next, we report the results of a series of experiments to evaluate the influence of redundant constraints on model editing and reusability tasks and describe the development of a new software tool for identifying and parsing constraint redundancy conditions. We conclude that constraint redundancy in profiles significantly and unnecessarily compromises model conciseness, robustness, and the overall model quality, which negatively affects user productivity and downstream processes. The implications of constraint redundancy conditions for CAD training are emphasized. Our experiments also demonstrate the value of our parsing tool to assist users in maximizing model reuse (by removing redundancies) and the communication of design intent (by proposing an optimal set of non-redundant constraints), but further development is necessary to use it as a practical tool for engineering analysis.
International Journal of Information Management, 2017
As CAD models continue to become more critical information sources in the product's lifecycle, it... more As CAD models continue to become more critical information sources in the product's lifecycle, it is necessary to develop efficient mechanisms to store, retrieve, and manage larger volumes of increasingly complex data. Because of their unique characteristics, 3D annotations can be used to embed design and manufacturing information directly into a CAD model, which makes models effective vehicles to describe aspects of the geometry or provide additional information that can be connected to a particular geometric element. However, access to this information is often limited, difficult, and even unavailable to external applications. As model complexity and volume of information continue to increase, new and more powerful methods to interrogate these annotations are needed. In this paper, we demonstrate how 3D annotations can be effectively structured and integrated into a Product Lifecycle Management (PLM) system to provide a cohesive view of product-related information in a design environment. We present a strategy to organize and manage annotation information which is stored internally in a CAD model, and make it fully available through the PLM. Our method involves a dual representation of 3D annotations with enhanced data structures that provides shared and easy access to the information. We describe the architecture of a system which includes a software component for the CAD environment and a module that integrates with the PLM server. We validate our approach through a software prototype that uses a parametric modeling application and two commercial PLM packages with distinct data models.
Volume 3: Manufacturing Equipment and Systems
Digital product data quality has proven to be a unifying theme in designing and reusing efficient... more Digital product data quality has proven to be a unifying theme in designing and reusing efficient products, particularly in the context of the Model-Based Enterprise (MBE). More specifically, the quality of the master model (usually a history-based parametric model) is critical, as it determines the quality of all secondary models used in subsequent downstream processes. However, no quantitative metrics exist that can provide a reliable assessment of quality at a high semantic level. In this paper, we introduce dimensional variability as a quality indicator for parametric models that connects the effective variability range of the dimensional constraints in a model to the robustness and flexibility of the parametric geometry, which determines its reusability. As a validation effort, we report the results of a study where a set of parametric models of varying complexity was analyzed, and discuss the significance of the links between the proposed metric and various aspects of the inte...
International Journal of Technology and Design Education
In order to be reusable, history-based feature-based parametric CAD models must reliably allow fo... more In order to be reusable, history-based feature-based parametric CAD models must reliably allow for modifications while maintaining their original design intent. In this paper, we demonstrate that relations that fix the location of geometric entities relative to the reference system produce inflexible profiles that reduce model reusability. We present the results of an experiment where novice students and expert CAD users performed a series of modifications in different versions of the same 2D profile, each defined with an increasingly higher number of fix geometric constraints. Results show that the amount of fix constraints in a 2D profile correlates with the time required to complete reusability tasks, i.e., the higher the number of fix constraints in a 2D profile, the less flexible and adaptable the profile becomes to changes. In addition, a pilot software tool to automatically track this type of constraints was developed and tested. Results suggest that the detection of fix constraint overuse may result in a new metric to assess poor quality models with low reusability. The tool provides immediate feedback for preventing high semantic level quality errors, and assistance to CAD users. Finally, suggestions are introduced on how to convert fix constraints in 2D profiles into a negative metric of 3D model quality.
Lecture Notes in Computer Science, 2013
Springer International Publishing AG, Cham (hereinafter called Springer) has the exclusive, sole,... more Springer International Publishing AG, Cham (hereinafter called Springer) has the exclusive, sole, permanent, worldwide , transferable, sub-licensable and unlimited right to reproduce, publish, distribute, transmit, make available or otherwise communicate to the public, translate, publicly perform, archive, store, lease or lend and sell the Contribution or parts thereof individually or together with other works in any language, in all revisions and versions (including soft cover, book club and collected editions, anthologies, advance printing, reprints or print to order, microfilm editions, audiograms and videograms), in all forms and media of expression including in electronic form (including offline and online use, push or pull technologies, use in databases and networks for display, print and storing on any and all stationary or portable end-user devices, e.g. text readers, audio, video or interactive devices, and for use in multimedia or interactive versions as well as for the display or transmission of the Contribution or parts thereof in data networks or seach engines), in whole, in part or in abridged form, in each case as now known or developed in the future, including the right to grant further timelimited or permanent rights. For the purposes of use in electronic forms, Springer may adjust the Contribution to the respective form of use and include links or otherwise combine it with other works. For the avoidance of doubt, Springer has the right to permit others to use individual illustrations and may use the Contribution for advertising purposes. The copyright of the Contribution will be held in the name of Springer. Springer may take, either in its own name or in that of copyright holder, any necessary steps to protect these rights against infringement by third parties. It will have the copyright notice inserted into all editions of the Contribution according to the provisions of the Universal Copyright Convention (UCC) and dutifully take care of all formalities in this connection in the name of the copyright holder.
Lecture Notes in Computer Science, 2013
Springer International Publishing AG, Cham (hereinafter called Springer) has the exclusive, sole,... more Springer International Publishing AG, Cham (hereinafter called Springer) has the exclusive, sole, permanent, worldwide , transferable, sub-licensable and unlimited right to reproduce, publish, distribute, transmit, make available or otherwise communicate to the public, translate, publicly perform, archive, store, lease or lend and sell the Contribution or parts thereof individually or together with other works in any language, in all revisions and versions (including soft cover, book club and collected editions, anthologies, advance printing, reprints or print to order, microfilm editions, audiograms and videograms), in all forms and media of expression including in electronic form (including offline and online use, push or pull technologies, use in databases and networks for display, print and storing on any and all stationary or portable end-user devices, e.g. text readers, audio, video or interactive devices, and for use in multimedia or interactive versions as well as for the display or transmission of the Contribution or parts thereof in data networks or search engines), in whole, in part or in abridged form, in each case as now known or developed in the future, including the right to grant further timelimited or permanent rights. For the purposes of use in electronic forms, Springer may adjust the Contribution to the respective form of use and include links or otherwise combine it with other works. For the avoidance of doubt, Springer has the right to permit others to use individual illustrations and may use the Contribution for advertising purposes. The copyright of the Contribution will be held in the name of Springer. Springer may take, either in its own name or in that of copyright holder, any necessary steps to protect these rights against infringement by third parties. It will have the copyright notice inserted into all editions of the Contribution according to the provisions of the Universal Copyright Convention (UCC) and dutifully take care of all formalities in this connection in the name of the copyright holder.
Early education is a key element for the future success of students in the education system. This... more Early education is a key element for the future success of students in the education system. This work analyzes the feasibility of using augmented reality contents with preschool students (four and five years old) as a tool for improving their learning process. A quasi experimental design based on a nonequivalent groups posttest-only design was used. A didactic unit has been developed around the topic "animals" by the participant teachers. The control group followed all the didactic activities defined in the developed didactic materials, while the experimental group was provided in addition with some augmented reality contents. Results show improved learning outcomes in the experimental group with respect to the control group.
Salvador-Herranz et al., A distributed collaborative learning tool based on a conceptual map para... more Salvador-Herranz et al., A distributed collaborative learning tool based on a conceptual map paradigm and natural interfaces applied to the case of product design studies
This paper presents a study to analyze the use of augmented reality (AR) for delivering multimedi... more This paper presents a study to analyze the use of augmented reality (AR) for delivering multimedia content to support the teaching and learning process of the digestive and circulatory systems at the primary school level, and its impact on knowledge retention. Our AR application combines oral explanations and 3D models and animations of anatomical structures. A validation study was conducted with fourth grade students in order to evaluate the effect of our tool on knowledge retention. In this study, we attempt to verify whether students using the AR application retained more concepts that those learning the topic in a traditional setting. Results show an increased knowledge retention on students using AR multimedia contents as opposed to those following a traditional course, which validates AR technology as a promising tool to improve students' motivation and interest, and to support the learning and teaching process in educational contexts.
2013 46th Hawaii International Conference on System Sciences, 2013
Augmented Reality (AR) offers many opportunities as an interactive tool to improve learning and t... more Augmented Reality (AR) offers many opportunities as an interactive tool to improve learning and teaching processes. This paper presents a pilot study conducted on third graders where a series of AR contents about Natural and Social Sciences have been used as a teaching tool. The main objective of the application is to help the students to learn complex concepts that present a difficult understanding. A user centered approach was followed to create the AR contents, where several teachers collaborated on its definition. The AR application combines 3D models and animations, mini games and quizzes. An evaluation of the educational contents was made from the point of view efficiency (academic achievement), usability and motivation. Results confirm that the use of desktop AR has had a positive impact on the learning and teaching process and reinforce the vision of AR as an affordable and feasible technological tool to support the students' learning activities.
Lecture Notes in Computer Science, 2014
Springer International Publishing AG, Cham (hereinafter called Springer) has the exclusive, sole,... more Springer International Publishing AG, Cham (hereinafter called Springer) has the exclusive, sole, permanent, worldwide , transferable, sub-licensable and unlimited right to reproduce, publish, distribute, transmit, make available or otherwise communicate to the public, translate, publicly perform, archive, store, lease or lend and sell the Contribution or parts thereof individually or together with other works in any language, in all revisions and versions (including soft cover, book club and collected editions, anthologies, advance printing, reprints or print to order, microfilm editions, audiograms and videograms), in all forms and media of expression including in electronic form (including offline and online use, push or pull technologies, use in databases and networks for display, print and storing on any and all stationary or portable end-user devices, e.g. text readers, audio, video or interactive devices, and for use in multimedia or interactive versions as well as for the display or transmission of the Contribution or parts thereof in data networks or seach engines), in whole, in part or in abridged form, in each case as now known or developed in the future, including the right to grant further time-limited or permanent rights. For the purposes of use in electronic forms, Springer may adjust the Contribution to the respective form of use and include links or otherwise combine it with other works. For the avoidance of doubt, Springer has the right to permit others to use individual illustrations and may use the Contribution for advertising purposes. The copyright of the Contribution will be held in the name of Springer. Springer may take, either in its own name or in that of copyright holder, any necessary steps to protect these rights against infringement by third parties. It will have the copyright notice inserted into all editions of the Contribution according to the provisions of the Universal Copyright Convention (UCC) and dutifully take care of all formalities in this connection in the name of the copyright holder.
Proceedings of the International Conference on Advances in Computer Enterntainment Technology - ACE '09, 2009
The objective of this study is to present the E-Junior application: a serious virtual world (SVW)... more The objective of this study is to present the E-Junior application: a serious virtual world (SVW) for teaching children natural science and ecology. E-Junior was designed according to pedagogical theories and curricular objectives in order to help students learn about the Mediterranean Sea and its ecological issues while playing. In this paper, we present the technical description of E-Junior and
Proceedings - 10th IEEE International Conference on Advanced Learning Technologies, ICALT 2010, 2010
Augmented reality provides solutions and benefits in many areas of knowledge. In the field of edu... more Augmented reality provides solutions and benefits in many areas of knowledge. In the field of education, we can apply this technology for learning contents and for developing skills in an engaging way. Engineering educators are aware of the need for spatial vision skills in order to project and interpret drawings and plans. We propose an educational kit for use at university-level with contents based on engineering graphics. Preliminary results of a validation study with first year Mechanical Engineering students indicate that this augmented reality training has a positive impact on students' spatial ability and learning for basic engineering graphics contents.
Studies in health technology and informatics, 2012
The aim of this paper is to present digital representations of humans (i.e., avatars) that look l... more The aim of this paper is to present digital representations of humans (i.e., avatars) that look like the self, applied to the Mental Health (MH) field. Virtual Representations of the Self (VRS) are in our opinion a tool with a great potential for engaging teenagers in emotional regulation strategies learning and an excellent example of new technology application to the basic concept in psychology field such as Bandura's modeling [1]. VRSs have already demonstrated their potential on human behavior modification (e.g. modification of physical activity; eating habits) in general population [2]. Thus, the same technology can bring in our opinion a lot to the Mental Health field, especially in emotional regulation learning. This paper presents a theoretical background and describes the methodology that we plan to apply in order to validate the efficacy of VRSs in clinical settings. Also, the implications of such technology and future research lines are discussed.
Procedia Computer Science, 2013
Parental influence on children's development is commonly accepted as essential, while the way how... more Parental influence on children's development is commonly accepted as essential, while the way how parents affect preschool students' information and communication technology (ICT) use at school needs a further exploration. This exploratory study is aimed to contribute to a better understanding of parental influence on children's Augmented Reality (AR) use at preschool education by analyzing interview data collected from parents whose children have worked at school with both; AR didactical resources and traditional didactical resources. The study identified and organized parent´s perspective into five components: motivation, knowledge, reading and writing, creativity and degree of satisfaction. The relationships among these components were often complex with intriguing similarities and differences among the participants. According to parents, the findings suggest that there are a lot of benefits in using a technological competitive tool based on AR: the integration of several components in order to achieve a common goal, the possibility of managing the execution of the exercises in several contexts, or the system availability.
Multimedia Tools and Applications, 2012
Abstract In this paper, a computer vision based interactive multi-touch tabletop system called Hu... more Abstract In this paper, a computer vision based interactive multi-touch tabletop system called HumanTop is introduced. HumanTop implements a stereo camera vision subsystem which allows not only an accurate fingertip tracking algorithm but also a precise touch-over-the-working surface detection method. Based on a pair of visible spectra cameras, a novel synchronization circuit makes the camera caption and the image projection independent from each other, providing the minimum basis for the development of computer vision ...
New Achievements in Technology Education and Development, Mar 1, 2010
Nowadays, our educational institutions are frustratingly outmoded in terms of teaching students. ... more Nowadays, our educational institutions are frustratingly outmoded in terms of teaching students. The entire process of giving lectures, taking notes, reading facts from books, and taking final exams is a throwback to institutions of learning dating back to the Renaissance. Remarkably, very little has changed today: with notable exceptions, the vast majority of university professors continue to bore students with ineffective, non-interactive approaches to education that result in little more than the professor's notes becoming the students' ...