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Achieving Better Energy Efficiency in Volume Analysis and Direct Volume Rendering Descriptor Computation 在体量分析和直接体量渲染描述符计算中实现更高的能效
Computers Pub Date : 2024-02-13 DOI: 10.3390/computers13020051
Jacob D. Hauenstein, Timothy S. Newman
{"title":"Achieving Better Energy Efficiency in Volume Analysis and Direct Volume Rendering Descriptor Computation","authors":"Jacob D. Hauenstein, Timothy S. Newman","doi":"10.3390/computers13020051","DOIUrl":"https://doi.org/10.3390/computers13020051","url":null,"abstract":"Approaches aimed at achieving improved energy efficiency for determination of descriptors—used in volumetric data analysis and one common mode of scientific visualisation—in one x86-class setting are described and evaluated. These approaches are evaluated against standard approaches for the computational setting. In all, six approaches for improved efficiency are considered. Four of them are computation-based. The other two are memory-based. The descriptors are classic gradient and curvature descriptors. In addition to their use in volume analyses, they are used in the classic ray-casting-based direct volume rendering (DVR), which is a particular application area of interest here. An ideal combination of the described approaches applied to gradient descriptor determination allowed them to to be computed with only 80% of the energy of a standard approach in the computational setting; energy efficiency was improved by a factor of 1.2. For curvature descriptor determination, the ideal combination of described approaches achieved a factor-of-two improvement in energy efficiency.","PeriodicalId":503381,"journal":{"name":"Computers","volume":"37 6","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139781656","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Leveraging Positive-Unlabeled Learning for Enhanced Black Spot Accident Identification on Greek Road Networks 利用正向无标记学习增强希腊道路网络的黑点事故识别能力
Computers Pub Date : 2024-02-08 DOI: 10.3390/computers13020049
Vasileios Sevetlidis, Georgios Pavlidis, S. Mouroutsos, A. Gasteratos
{"title":"Leveraging Positive-Unlabeled Learning for Enhanced Black Spot Accident Identification on Greek Road Networks","authors":"Vasileios Sevetlidis, Georgios Pavlidis, S. Mouroutsos, A. Gasteratos","doi":"10.3390/computers13020049","DOIUrl":"https://doi.org/10.3390/computers13020049","url":null,"abstract":"Identifying accidents in road black spots is crucial for improving road safety. Traditional methodologies, although insightful, often struggle with the complexities of imbalanced datasets, while machine learning (ML) techniques have shown promise, our previous work revealed that supervised learning (SL) methods face challenges in effectively distinguishing accidents that occur in black spots from those that do not. This paper introduces a novel approach that leverages positive-unlabeled (PU) learning, a technique we previously applied successfully in the domain of defect detection. The results of this work demonstrate a statistically significant improvement in key performance metrics, including accuracy, precision, recall, F1-score, and AUC, compared to SL methods. This study thus establishes PU learning as a more effective and robust approach for accident classification in black spots, particularly in scenarios with highly imbalanced datasets.","PeriodicalId":503381,"journal":{"name":"Computers","volume":" 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139791282","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Extended Reality as an Educational Resource in the Primary School Classroom: An Interview of Drawbacks and Opportunities 将扩展现实作为小学课堂的教育资源：弊端与机遇访谈
Computers Pub Date : 2024-02-08 DOI: 10.3390/computers13020050
J. Fernández-Batanero, Marta Montenegro-Rueda, José Fernández-Cerero, Eloy López-Meneses
{"title":"Extended Reality as an Educational Resource in the Primary School Classroom: An Interview of Drawbacks and Opportunities","authors":"J. Fernández-Batanero, Marta Montenegro-Rueda, José Fernández-Cerero, Eloy López-Meneses","doi":"10.3390/computers13020050","DOIUrl":"https://doi.org/10.3390/computers13020050","url":null,"abstract":"The use of Extended Reality in Primary Education classrooms has emerged as a transformative element that enhances the teaching and learning process of students. In this context, examining the various effects that this tool can generate is essential to identify both the opportunities and limitations that teachers face when incorporating this technology into their practices. The aim of this research is to analyse the impact of the use of Extended Reality as an educational resource in Primary Education, focusing on teachers’ perceptions. The information was collected through semi-structured interviews with 36 active teachers in Primary Education. The analysis of the data obtained identifies the benefits and functionalities offered by the implementation of Extended Reality in Primary Education classrooms, as well as the uncertainties and concerns that teachers have with the implementation of Extended Reality. The results highlight the significant opportunities that Extended Reality offers in the teaching–learning process, provided that teachers are adequately trained. Furthermore, this study offers valuable recommendations to guide future teachers and researchers in the successful integration of this technology into the educational process.","PeriodicalId":503381,"journal":{"name":"Computers","volume":" 34","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139792362","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Extended Reality as an Educational Resource in the Primary School Classroom: An Interview of Drawbacks and Opportunities 将扩展现实作为小学课堂的教育资源：弊端与机遇访谈
Computers Pub Date : 2024-02-08 DOI: 10.3390/computers13020050
J. Fernández-Batanero, Marta Montenegro-Rueda, José Fernández-Cerero, Eloy López-Meneses
{"title":"Extended Reality as an Educational Resource in the Primary School Classroom: An Interview of Drawbacks and Opportunities","authors":"J. Fernández-Batanero, Marta Montenegro-Rueda, José Fernández-Cerero, Eloy López-Meneses","doi":"10.3390/computers13020050","DOIUrl":"https://doi.org/10.3390/computers13020050","url":null,"abstract":"The use of Extended Reality in Primary Education classrooms has emerged as a transformative element that enhances the teaching and learning process of students. In this context, examining the various effects that this tool can generate is essential to identify both the opportunities and limitations that teachers face when incorporating this technology into their practices. The aim of this research is to analyse the impact of the use of Extended Reality as an educational resource in Primary Education, focusing on teachers’ perceptions. The information was collected through semi-structured interviews with 36 active teachers in Primary Education. The analysis of the data obtained identifies the benefits and functionalities offered by the implementation of Extended Reality in Primary Education classrooms, as well as the uncertainties and concerns that teachers have with the implementation of Extended Reality. The results highlight the significant opportunities that Extended Reality offers in the teaching–learning process, provided that teachers are adequately trained. Furthermore, this study offers valuable recommendations to guide future teachers and researchers in the successful integration of this technology into the educational process.","PeriodicalId":503381,"journal":{"name":"Computers","volume":"326 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139852148","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Linear Actuators in a Haptic Feedback Joystick System for Electric Vehicles 电动汽车触觉反馈操纵杆系统中的线性致动器
Computers Pub Date : 2024-02-06 DOI: 10.3390/computers13020048
Kamil Andrzej Daniel, P. Kowol, Grazia Lo Sciuto
{"title":"Linear Actuators in a Haptic Feedback Joystick System for Electric Vehicles","authors":"Kamil Andrzej Daniel, P. Kowol, Grazia Lo Sciuto","doi":"10.3390/computers13020048","DOIUrl":"https://doi.org/10.3390/computers13020048","url":null,"abstract":"Several strategies for navigation in unfamiliar environments have been explored, notably leveraging advanced sensors and control algorithms for obstacle recognition in autonomous vehicles. This study introduces a novel approach featuring a redesigned joystick equipped with stepper motors and linear drives, facilitating WiFi communication with a four-wheel omnidirectional electric vehicle. The system’s drive units integrated into the joystick and the encompassing control algorithms are thoroughly examined, including analysis of stick deflection measurement and inter-component communication within the joystick assembly. Unlike conventional setups in which the joystick is tilted by the operator, two independent linear drives are employed to generate ample tensile force, effectively “overpowering” the operator’s input. Running on a Raspberry Pi, the software utilizes Python programming to enable joystick tilt control and to transmit orientation and axis deflection data to an Arduino unit. A fundamental haptic effect is achieved by elevating the minimum pressure required to deflect the joystick rod. Test measurements encompass detection of obstacles along the primary directions perpendicular to the electric vehicle’s trajectory, determination of the maximum achievable speed, and evaluation of the joystick’s maximum operational range within an illuminated environment.","PeriodicalId":503381,"journal":{"name":"Computers","volume":"61 7","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139861447","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Linear Actuators in a Haptic Feedback Joystick System for Electric Vehicles 电动汽车触觉反馈操纵杆系统中的线性致动器
Computers Pub Date : 2024-02-06 DOI: 10.3390/computers13020048
Kamil Andrzej Daniel, P. Kowol, Grazia Lo Sciuto
{"title":"Linear Actuators in a Haptic Feedback Joystick System for Electric Vehicles","authors":"Kamil Andrzej Daniel, P. Kowol, Grazia Lo Sciuto","doi":"10.3390/computers13020048","DOIUrl":"https://doi.org/10.3390/computers13020048","url":null,"abstract":"Several strategies for navigation in unfamiliar environments have been explored, notably leveraging advanced sensors and control algorithms for obstacle recognition in autonomous vehicles. This study introduces a novel approach featuring a redesigned joystick equipped with stepper motors and linear drives, facilitating WiFi communication with a four-wheel omnidirectional electric vehicle. The system’s drive units integrated into the joystick and the encompassing control algorithms are thoroughly examined, including analysis of stick deflection measurement and inter-component communication within the joystick assembly. Unlike conventional setups in which the joystick is tilted by the operator, two independent linear drives are employed to generate ample tensile force, effectively “overpowering” the operator’s input. Running on a Raspberry Pi, the software utilizes Python programming to enable joystick tilt control and to transmit orientation and axis deflection data to an Arduino unit. A fundamental haptic effect is achieved by elevating the minimum pressure required to deflect the joystick rod. Test measurements encompass detection of obstacles along the primary directions perpendicular to the electric vehicle’s trajectory, determination of the maximum achievable speed, and evaluation of the joystick’s maximum operational range within an illuminated environment.","PeriodicalId":503381,"journal":{"name":"Computers","volume":"95 S7","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139801298","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Passenger Routing Algorithm for COVID-19 Spread Prevention by Minimising Overcrowding 通过尽量减少拥挤防止 COVID-19 传播的乘客路线算法
Computers Pub Date : 2024-02-05 DOI: 10.3390/computers13020047
Dimitrios Tolikas, E. Spyrou, V. Kappatos
{"title":"Passenger Routing Algorithm for COVID-19 Spread Prevention by Minimising Overcrowding","authors":"Dimitrios Tolikas, E. Spyrou, V. Kappatos","doi":"10.3390/computers13020047","DOIUrl":"https://doi.org/10.3390/computers13020047","url":null,"abstract":"COVID-19 has become a pandemic which has resulted in measures being taken for the health and safety of people. The spreading of this disease is particularly evident in indoor spaces, which tend to get overcrowded with people. One such place is the airport where a plethora of passengers gather in common places, such as coffee shops and duty-free shops as well as toilets and gates. Guiding the passengers to less overcrowded places within the airport may be a solution to reduce disease spread. In this paper, we suggest a passenger routing algorithm whereby the passengers are guided to less crowded places by using a weighting factor, which is minimised to accomplish the desired goal. We modeled a number of shops in an airport using the AnyLogic software and we tested the algorithm showing that the exposure time is less with routing and that people are appropriately spread out across the common spaces, thus preventing overcrowding. Finally, we added a real airport in Kavala, Greece to show the efficiency of our approach.","PeriodicalId":503381,"journal":{"name":"Computers","volume":"15 s1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139805157","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Passenger Routing Algorithm for COVID-19 Spread Prevention by Minimising Overcrowding 通过尽量减少拥挤防止 COVID-19 传播的乘客路线算法
Computers Pub Date : 2024-02-05 DOI: 10.3390/computers13020047
Dimitrios Tolikas, E. Spyrou, V. Kappatos
{"title":"Passenger Routing Algorithm for COVID-19 Spread Prevention by Minimising Overcrowding","authors":"Dimitrios Tolikas, E. Spyrou, V. Kappatos","doi":"10.3390/computers13020047","DOIUrl":"https://doi.org/10.3390/computers13020047","url":null,"abstract":"COVID-19 has become a pandemic which has resulted in measures being taken for the health and safety of people. The spreading of this disease is particularly evident in indoor spaces, which tend to get overcrowded with people. One such place is the airport where a plethora of passengers gather in common places, such as coffee shops and duty-free shops as well as toilets and gates. Guiding the passengers to less overcrowded places within the airport may be a solution to reduce disease spread. In this paper, we suggest a passenger routing algorithm whereby the passengers are guided to less crowded places by using a weighting factor, which is minimised to accomplish the desired goal. We modeled a number of shops in an airport using the AnyLogic software and we tested the algorithm showing that the exposure time is less with routing and that people are appropriately spread out across the common spaces, thus preventing overcrowding. Finally, we added a real airport in Kavala, Greece to show the efficiency of our approach.","PeriodicalId":503381,"journal":{"name":"Computers","volume":"54 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139865200","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
ADHD Dog: A Virtual Reality Intervention Incorporating Behavioral and Sociocultural Theories with Gamification for Enhanced Regulation in Individuals with Attention Deficit Hyperactivity Disorder 多动症狗：将行为和社会文化理论与游戏化相结合的虚拟现实干预措施，增强注意力缺陷多动障碍患者的调节能力
Computers Pub Date : 2024-02-04 DOI: 10.3390/computers13020046
Nikolaos Sergis, C. Troussas, Akrivi Krouska, Christina Tzortzi, Georgios Bardis, C. Sgouropoulou
{"title":"ADHD Dog: A Virtual Reality Intervention Incorporating Behavioral and Sociocultural Theories with Gamification for Enhanced Regulation in Individuals with Attention Deficit Hyperactivity Disorder","authors":"Nikolaos Sergis, C. Troussas, Akrivi Krouska, Christina Tzortzi, Georgios Bardis, C. Sgouropoulou","doi":"10.3390/computers13020046","DOIUrl":"https://doi.org/10.3390/computers13020046","url":null,"abstract":"The need for effective cognitive training methodologies has increased, particularly for individuals dealing with Attention Deficit Hyperactivity Disorder (ADHD). In response to this demand, Virtual Reality (VR) technology emerges as a promising tool to support cognitive functions. Addressing this imperative, our paper introduces ADHD Dog, a VR game designed to aid individuals with ADHD by harnessing the advancements in VR technology and cognitive science. Our approach integrates behavioral and sociocultural theories, alongside gamification, to foster player engagement and reinforce cognitive functions. The theories employed, including operant conditioning and social constructivism, are specifically chosen for their relevance to ADHD’s cognitive aspects and their potential to promote active and context-based engagement. ADHD Dog, grounded in the principles of neuroplasticity and behaviorist methods, distinguishes itself by utilizing technology to amplify cognitive functions, like impulse control, attention, and short-term memory. An evaluation by individuals with ADHD, psychologists and computer scientists yielded promising results, underscoring the significant contribution of blending narrative-driven gameplay with behavioral and sociocultural theories, along with gamification, to ADHD cognitive training.","PeriodicalId":503381,"journal":{"name":"Computers","volume":"8 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139806407","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
ADHD Dog: A Virtual Reality Intervention Incorporating Behavioral and Sociocultural Theories with Gamification for Enhanced Regulation in Individuals with Attention Deficit Hyperactivity Disorder 多动症狗：将行为和社会文化理论与游戏化相结合的虚拟现实干预措施，增强注意力缺陷多动障碍患者的调节能力
Computers Pub Date : 2024-02-04 DOI: 10.3390/computers13020046
Nikolaos Sergis, C. Troussas, Akrivi Krouska, Christina Tzortzi, Georgios Bardis, C. Sgouropoulou
{"title":"ADHD Dog: A Virtual Reality Intervention Incorporating Behavioral and Sociocultural Theories with Gamification for Enhanced Regulation in Individuals with Attention Deficit Hyperactivity Disorder","authors":"Nikolaos Sergis, C. Troussas, Akrivi Krouska, Christina Tzortzi, Georgios Bardis, C. Sgouropoulou","doi":"10.3390/computers13020046","DOIUrl":"https://doi.org/10.3390/computers13020046","url":null,"abstract":"The need for effective cognitive training methodologies has increased, particularly for individuals dealing with Attention Deficit Hyperactivity Disorder (ADHD). In response to this demand, Virtual Reality (VR) technology emerges as a promising tool to support cognitive functions. Addressing this imperative, our paper introduces ADHD Dog, a VR game designed to aid individuals with ADHD by harnessing the advancements in VR technology and cognitive science. Our approach integrates behavioral and sociocultural theories, alongside gamification, to foster player engagement and reinforce cognitive functions. The theories employed, including operant conditioning and social constructivism, are specifically chosen for their relevance to ADHD’s cognitive aspects and their potential to promote active and context-based engagement. ADHD Dog, grounded in the principles of neuroplasticity and behaviorist methods, distinguishes itself by utilizing technology to amplify cognitive functions, like impulse control, attention, and short-term memory. An evaluation by individuals with ADHD, psychologists and computer scientists yielded promising results, underscoring the significant contribution of blending narrative-driven gameplay with behavioral and sociocultural theories, along with gamification, to ADHD cognitive training.","PeriodicalId":503381,"journal":{"name":"Computers","volume":"3 5","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139866296","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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