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A Satellite Ground System with an "Edge-Cloud-Terminal" Structure 具有“边缘-云终端”结构的卫星地面系统
Fei Zhang, Jiangyi Qin, Dechao Ran, Lu Cao, Pengyu Guo
Satellite ground system is the interface between a satellite and its users. It has two main functions: (1) resource management and (2) service provisioning. It is difficult to efficiently carry out these two goals with traditional system because a satellite ground system contains a variety of elements and users' service demands are increasing as well. In this paper, we propose a new satellite ground system with an "edge-cloud-terminal" structure. Cloud computing and edge computing are used to efficiently manage system resources and improve service quality, respectively. A user's request is responded by the edge data center which is close to the user to lower service latency. Moreover, the information flow and the task management strategy of the ground system are described.
卫星地面系统是卫星与其用户之间的接口。它有两个主要功能:(1)资源管理和(2)服务发放。由于卫星地面系统包含多种要素,用户的业务需求也在不断增加,传统系统难以有效地实现这两个目标。本文提出了一种新型的“边缘-云端”结构的卫星地面系统。云计算和边缘计算分别用于高效管理系统资源和提升服务质量。用户的请求由靠近用户的边缘数据中心响应,以降低服务延迟。介绍了地面系统的信息流程和任务管理策略。
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引用次数: 0
Potential Use of Personal Tracking Device for Sleep Quality Assessment of Flight Attendant 个人跟踪设备在空乘人员睡眠质量评估中的潜在应用
Aurawan Imsombut, Waraporn Jirapanthong, Banyapon Poolsawas, Vongsa Laovoravit, K. Pongpirul
Sleep is a vital component of good health and well-being. However, working in some career, i.e. flight attendant, affect irregular sleep periods, and cause sleep problem. This paper presents the assessment of sleep quality for flight attendants by analyzing a set of images that are produced by a smartwatch application. The proposed method is an image processing technique to extract sleep data in three aspects: 1) sleep duration 2) the ratio of occurrences in each stage i.e. awake, REM, light, and deep 3) sequence of the sleeping stage. The results showed that the proposed techniques can analyze sleep duration, the ratio of occurrences in each stage, and the sequence of sleeping stage correctly 94.44%, 90.57% and 94.04%, respectively. The analysis information can be used to set up the crew's work schedules in order to increase the quality of life and work efficiency.
睡眠是健康和幸福的重要组成部分。然而,从事某些职业,如空姐,会影响睡眠不规律,导致睡眠问题。本文通过分析智能手表应用程序生成的一组图像,对空乘人员的睡眠质量进行了评估。本文提出的方法是一种图像处理技术,从三个方面提取睡眠数据:1)睡眠持续时间;2)每个阶段(清醒、快速眼动、浅、深)发生的比例;3)睡眠阶段的顺序。结果表明,该方法对睡眠持续时间、各阶段出现率和睡眠阶段顺序的分析正确率分别为94.44%、90.57%和94.04%。这些分析信息可以用来制定船员的工作时间表,以提高生活质量和工作效率。
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引用次数: 0
How to Forecast the Students' Learning Outcomes Based on Factors of Interactive Activities in a Blended Learning Course 混合式学习课程中如何基于互动活动因素预测学生的学习成果
Minh-Duc Le, Hoa-Huy Nguyen, Duc-Loc Nguyen, V. A. Nguyen
This paper summarizes the research results of identifying the influencing factors in the online learning phase of a blended learning course. From such factors, we propose a model for predicting student outcomes. In our study, we have conducted several models in order to predict the student's learning outcomes, using a course of 231 participants. Obtained data from the logs file of an LMS system is analyzed using learning analytics and machine learning techniques, and the results propose that the four factors are the number of views, the number of posts, the number of forum views, and the number of on-time submitted assignments impact on the student's learning outcomes. For the forecast of the final exam grade based on the results of the formative assessment tests, Bayesian Ridge is the most accurate among the four conducted models (Linear Regression, KNR, SVM, Bayesian Ridge). Our study can be a useful material for lecturers and course designers in effectively organizing blended learning courses.
本文总结了混合学习课程在线学习阶段影响因素识别的研究成果。基于这些因素,我们提出了一个预测学生成绩的模型。在我们的研究中,我们使用231名参与者的课程,进行了几个模型来预测学生的学习成果。使用学习分析和机器学习技术对从LMS系统的日志文件中获得的数据进行分析,结果表明,四个因素是浏览量、帖子数量、论坛浏览量和按时提交作业数量对学生学习成果的影响。对于基于形成性评价测试的结果预测期末考试成绩,在四种模型(线性回归、KNR、SVM、Bayesian Ridge)中,Bayesian Ridge是最准确的。我们的研究可以为讲师和课程设计者有效地组织混合式学习课程提供有用的材料。
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引用次数: 1
A Method for Discovering Local Travel Information from Travel-blogs 一种从旅游博客中发现当地旅游信息的方法
Yingying Lao, Yilun Wei, Dongli Han
Information mining for travel has become a popular research domain in the development of tourism industry nowadays. Currently, studies focusing on the extraction of available travel information from actual tourists' evaluations and reviews on social media sites have been conducted under numerous occasions. In this study, we have proposed another effective yet simple method of discovering local travel-information from traveler's blogs by locating region-sensitive information for the travelers. In this process, regionally restricted words are first extracted based on their frequency of appearances inside the blog. Then, a region-restrictedness score of each blog is calculated through the analysis of the previously extracted regionally restricted phrases. From there, we begin analyzing the content of each blog and classify them into pre-defined categories, using LDA model and word embedding-representations. Through this process, we are able to generate blog recommendations based on our method and see some successful examples as a proof for the effectiveness of our approach.
旅游信息挖掘已成为当今旅游业发展的一个热门研究领域。目前,从社交媒体网站上实际游客的评价和评论中提取可用旅游信息的研究已经在很多场合进行。在这项研究中,我们提出了另一种有效而简单的方法,通过定位旅行者的地区敏感信息,从旅行者的博客中发现当地的旅游信息。在这个过程中,首先根据区域限制词在博客中的出现频率提取区域限制词。然后,通过分析之前提取的区域限制短语,计算每个博客的区域限制得分。从那里,我们开始分析每个博客的内容,并使用LDA模型和词嵌入表示将它们分类到预定义的类别中。通过这个过程,我们能够根据我们的方法生成博客推荐,并看到一些成功的例子来证明我们方法的有效性。
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引用次数: 0
Reversible Data Hiding in Encrypted Image Based on Flipping MSB Encryption Process 基于翻转MSB加密过程的加密图像可逆数据隐藏
C. Weng, Cheng-Hsing Yang, Guang-Yih Hsu, Rong-Jaye Chen, Chun-Ta Li
A novel reversible data hiding method based on vacating room for specific encryption process in encrypted image is proposed by Huang and Wang in 2020. In their method, they applied pixel value expansion approach to vacate a specific room for data concealing. However, we find out that the Huang and Wang's method will have a shortcoming of non-reversible encryption while the specific room is larger than 193. This paper proposes an improved method for overcoming the shortcoming of nonreversible encryption developed by Huang and Wang. In our embedding process, the prediction error (PE) is firstly computed, and then, the prediction error strategy is taken into consideration for secret data embedding. The prediction error strategy is applied to determine that the original pixel or flipping one MSB original pixel is suitable for performing message hiding. The experimental results show that the proposed method has superior performance in terms of embedding capacity and compression ratio than that of the other state-of-the-art methods.
Huang和Wang在2020年提出了一种新的基于在加密图像中为特定加密过程腾出空间的可逆数据隐藏方法。在他们的方法中,他们采用像素值扩展的方法,腾出一个特定的空间来隐藏数据。但是,我们发现Huang和Wang的方法在特定房间大于193时存在加密不可逆的缺点。本文提出了一种改进的方法来克服Huang和Wang提出的不可逆加密的缺点。在我们的嵌入过程中,首先计算预测误差(PE),然后考虑秘密数据嵌入的预测误差策略。预测误差策略用于确定原始像素或翻转一个MSB原始像素是否适合执行消息隐藏。实验结果表明,该方法在嵌入容量和压缩比方面都优于现有方法。
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引用次数: 0
How Are the Students' Steps in Solving Mathematical Problems? 学生解决数学问题的步骤如何?
D. E. P. Rini, S. Prabawanto, F. Fakhrunisa
Problem solving is a students' basic ability needed in 21st century. One of the goals in learning Mathematics is that students have the ability to solve problems including the ability to understand problems, design mathematical models, solve the problem and interpret the solutions obtained. This study aimed to describe the process students solve mathematical problems based on the Polya model presented in word problems and picture illustrations. This study was qualitative research with a phenomenological design. The Data were collected by using test, interview, and observations. The participants of this study were 29 junior high school students in Indonesia. The participants were selected refer to the Mathematics teacher's recommendations and the suitability between the research objectives and the topics they had learned. The result of this study indicated that students had difficulty in solving on word problem, especially on the stage of understanding the problem and devising the plan. Furthermore, students faced obstacles in devising the plan and looking a back stage in illustrated problems which affect the outcome of the problem completion.
问题解决能力是21世纪学生必备的基本能力。学习数学的目标之一是使学生具备解决问题的能力,包括理解问题、设计数学模型、解决问题和解释得到的解的能力。本研究旨在描述学生解决数学问题的过程,以文字问题和图片插图中的Polya模型为基础。本研究采用现象学设计的定性研究。数据收集采用测试、访谈、观察等方法。本研究以29名印尼初中生为研究对象。参与者是根据数学老师的推荐和研究目标与所学主题的适合性来选择的。本研究结果显示,学生在解决文字问题上存在困难,尤其是在理解问题和设计方案的阶段。此外,学生在制定计划和看问题的后台方面面临障碍,这影响了问题完成的结果。
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引用次数: 0
Pedagogical Data Federation toward Education 4.0 面向教育4.0的教学数据联盟
Song Guo, Deze Zeng
Pedagogical data analysis has been recognized as one of the most important issues in pursuing Education 4.0. The recent rapid development of IT technologies benefits pedagogical data analysis via the provisioning of many advanced technologies such as big data analysis and machine learning. Meanwhile, the privacy of the students become another concern and this makes the educational institutions reluctant to share their students' data, forming isolated data islands and hindering the realization of big pedagogical data analysis. To tackle such challenge, in this paper, we propose a federated learning based education data analysis framework FEEDAN, via which pedagogical data federations can be formed by a number of institutions. None of them needs to direct exchange the their pedagogical data with each other and they always keep the data in their own place to guarantee their students' privacy. We apply our framework to analyze real pedagogical data. The experiment results show that it not only guarantees the students' privacy but also indeed breaks the borders of data island by achieving a higher analysis quality. Our framework can much approach the performance of centralized analysis which needs to collect the data in a common place with the risk of privacy exposure.
教学数据分析已被认为是追求教育4.0的最重要问题之一。近年来信息技术的快速发展,通过提供许多先进的技术,如大数据分析和机器学习,有利于教学数据分析。同时,学生的隐私成为另一个问题,这使得教育机构不愿意共享学生的数据,形成孤立的数据孤岛,阻碍了教学大数据分析的实现。为了应对这一挑战,本文提出了一个基于联邦学习的教育数据分析框架FEEDAN,通过该框架,多个机构可以形成教学数据联盟。他们都不需要彼此直接交换教学数据,他们总是把数据保存在自己的地方,以保证学生的隐私。我们应用我们的框架来分析真实的教学数据。实验结果表明,它不仅保证了学生的隐私,而且确实打破了数据孤岛的边界,实现了更高的分析质量。我们的框架可以在很大程度上接近集中分析的性能,集中分析需要在一个公共的地方收集数据,并且有隐私暴露的风险。
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引用次数: 3
The Essence of Interactivity and Its Impact on Online Learning Community 互动性的本质及其对在线学习社区的影响
Rong Zhao, Xing-Yu Luo, Yumeng Chen
Interactivity, as the vital attribute of technique dimension, functions in promoting emotional sustenance and aiding the accomplishment of task, which facilitates the maintenance and development of online learning community. This study argued that in spite of the diversity of communicative systems and tools, it is the essence of interactivity that contributes significantly to learners' task fulfillment and social-emotional satisfaction, and thus indirectly to their continuance intention. In this research, data were collected from 299 university students of 3 online learning modes, and the relationships between interactivity, sense of community, perceived usefulness and learners' continuance intention were examined by SmartPLS2.0. This study proved that the advocated essence of interactivity has significantly positive effect on learners' sense of community and perceived usefulness of online education, and plays a partially mediating role in maintaining their continuance intention.
互动性作为技术维度的重要属性,具有促进情感寄托和辅助任务完成的功能,有利于在线学习社区的维护和发展。本研究认为,尽管交际系统和工具的多样性,但互动性的本质对学习者的任务完成和社会情感满意度有重要贡献,从而间接影响他们的继续意愿。本研究以299名采用3种在线学习模式的大学生为研究对象,采用SmartPLS2.0软件对互动性、社区感、感知有用性与学习者继续学习意愿之间的关系进行分析。本研究证明,互动性本质的倡导对学习者的社区意识和在线教育有用性感知有显著的正向影响,并对学习者继续学习意愿的维持起部分中介作用。
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引用次数: 3
Service-Based Container Deployment on Kubernetes Using Stable Marriage Problem Kubernetes上基于服务的容器部署,使用稳定的婚姻问题
Akhmad Alimudin, Y. Ishida
Container technology is currently the most widely used technology because of its ease of use and the efficiency of resource usage compared to the use of virtual machines. Moreover, the use of container technology is now made easier by the existence of orchestration tools such as Kubernetes, Docker Swarm, and Mesos. Orchestration tools make it easier for container users to deploy services and control resource. One of the main components of orchestration tools is a scheduler whose job is to manage container placement into a host. In this research, we tried to make a custom scheduler on Kubernetes using Stable Marriage Problem to get the best deployment between containers and hosts. Our trial scenario is to match three web services with three different hosts/servers. From the results of the experiment, containers that are deployed by using the SMP-scheduler have advantages in containers that prioritize CPU usage.
容器技术是目前使用最广泛的技术,因为与使用虚拟机相比,它的易用性和资源使用效率更高。此外,容器技术的使用也因为编排工具(如Kubernetes、Docker Swarm和Mesos)的存在而变得更加容易。编排工具使容器用户更容易部署服务和控制资源。编排工具的主要组件之一是调度器,它的工作是管理容器放置到主机中。在这项研究中,我们尝试在Kubernetes上使用Stable Marriage Problem创建一个自定义调度器,以获得容器和主机之间的最佳部署。我们的试验场景是将三个web服务与三个不同的主机/服务器相匹配。从实验结果来看,使用smp调度器部署的容器在对CPU使用进行优先级排序的容器中具有优势。
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引用次数: 2
Think+: Using Virtual Reality Therapy Game Mobile Application for Treating Phobia 思考+:使用虚拟现实治疗游戏手机应用程序治疗恐惧症
C. Go, Edvard G. Leis, Mark Jonelle D. Quiambao, M. Samonte, Gloren S. Fuentes, Cristina A. Pascua
The main purpose of Think+ is to provide both psychiatrists and common people alike to help treat phobias without the need of complex treatment procedures. Using a virtual environment, the app intends to help provide an experience for a user to give the players a chance to get over their fears without having to go through the burden of multiple therapies. Given that people with phobias do not see a doctor or psychiatrist as often as they should, people are always feeling threatened whenever they come in contact with what caused their fear in the first place, which is sometimes inevitable. The study focus on most common phobias with the use of Virtual Reality Technology that will assist psychologists and psychiatrists in treating phobias. The developed virtual reality system is fully functional and technically assessed to meet the requirements of its intended use. Based from the Psychologists, Psychiatrist and experts' user acceptance testing done, the developed system is equipped with requirements intended for patients with phobia. The application is working properly according to its purpose and is suited to be used for patients' for phobia exposure and interaction in a virtual reality environment.
Think+的主要目的是为精神病医生和普通人提供治疗恐惧症的帮助,而不需要复杂的治疗程序。利用虚拟环境,这款应用旨在为用户提供一种体验,让玩家有机会克服他们的恐惧,而无需经历多种治疗的负担。考虑到患有恐惧症的人不经常去看医生或精神科医生,每当他们接触到最初引起他们恐惧的东西时,他们总是感到受到威胁,这有时是不可避免的。这项研究将重点放在最常见的恐惧症上,使用虚拟现实技术,帮助心理学家和精神科医生治疗恐惧症。开发的虚拟现实系统功能齐全,技术评估满足其预期用途的要求。根据心理学家、精神病学家和专家的用户验收测试,开发的系统配备了针对恐惧症患者的要求。该应用程序根据其目的正常工作,适合用于患者在虚拟现实环境中的恐惧症暴露和互动。
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引用次数: 4
期刊
Proceedings of the 6th International Conference on Frontiers of Educational Technologies
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