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Federation-Level Agreement and Integrity-Based Managed Cloud Federation Architecture 联邦级协议和基于完整性的托管云联邦架构
Pub Date : 2020-10-01 DOI: 10.4018/jitr.2020100107
Afifa Ghenai, Chems Eddine Nouioua
One of the biggest challenges in cloud federations is how to express the federation level agreement (FLA) and voluntary aspect of the federation members and maintain the integrity of the organization. However, existing works are not able to present the cloud federation management aspect or implement these properties that distinguish cloud federation from other inter-cloud organizations. This paper bridges this gap by proposing a managed cloud federation architecture based on this subset of properties. The key component of this architecture is the federation manager that controls, tracks, evaluates, and predicts the behavior of the federation. In order to ensure the effectiveness of the approach, the authors developed the Managed Federation Simulator to implement the proposed federation architecture on the SmartFed simulator and evaluate it through a set of scenarios on a real case study.
云联盟中最大的挑战之一是如何表达联盟级别协议(FLA)和联盟成员的自愿方面,并保持组织的完整性。但是,现有的工作无法呈现云联合管理方面,也无法实现将云联合与其他云间组织区分开来的这些属性。本文通过提出基于这些属性子集的托管云联合架构来弥合这一差距。该体系结构的关键组件是控制、跟踪、评估和预测联合行为的联合管理器。为了确保该方法的有效性,作者开发了托管联邦模拟器,以在SmartFed模拟器上实现所提出的联邦架构,并通过一组真实案例研究的场景对其进行评估。
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引用次数: 0
Visualizing Artificial Intelligence Used in Education Over Two Decades 二十年来人工智能在教育中的应用可视化
Pub Date : 2020-10-01 DOI: 10.4018/jitr.2020100103
Zhonggen Yu
With the rapid development of computer science, use of artificial intelligence (AI) in education has caught much attention across the world although it is still a young field with many under-explored research elements. Through visualizing study with bibliometric evaluation and taxonomy of the literature using both VOSviewer and CiteSpace, this study provided references for readers in terms of cluster mapping on the basis of keywords, bibliographic coupling of countries, cluster mapping on the basis of co-citations, citation counts, bursts, betweenness centrality, and sigma. Researchers could also take the findings of this study into serious consideration when they set about researching effectiveness, efficiency, or usefulness of AI in education. Future research into use of AI in education will most likely need interdisciplinary cooperation between computer science, statistics, education, cognition, and robotics.
随着计算机科学的快速发展,人工智能(AI)在教育中的应用引起了全世界的广泛关注,尽管它仍然是一个年轻的领域,有许多研究元素尚未得到充分的探索。本研究利用VOSviewer和CiteSpace对文献进行可视化评价和分类,为读者在基于关键词的聚类映射、国家书目耦合、基于共被引、被引次数、爆发、中间中心性和sigma的聚类映射等方面提供参考。研究人员在着手研究人工智能在教育中的有效性、效率或有用性时,也可以认真考虑这项研究的结果。未来在教育中使用人工智能的研究很可能需要计算机科学、统计学、教育、认知和机器人之间的跨学科合作。
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引用次数: 20
Telepsychiatry Use in Rural Areas in the United States: A Literature Review of the Benefits 远程精神病学在美国农村地区的应用:获益文献综述
Pub Date : 2020-10-01 DOI: 10.4018/jitr.2020100101
Alberto Coustasse, Morgan Ruley, T. C. Mike, Briana M. Washington, Anna Robinson
Rural areas have experienced a higher than average shortage of healthcare professionals. Numerous challenges have limited access to mental health services. Some of these barriers have included transportation, number of providers, poverty, and lack of insurance. Recently, the utilization of telepsychiatry has increased in rural areas. The purpose of this review was to identify and coalesce the benefits of telepsychiatry for adults living in rural communities in the United States to determine if telepsychiatry has improved access and quality of care. The methodology for this study was a literature review that followed a systematic approach. References and sources were written in English and were taken from studies in the United States between 2004 and 2018 to keep this review current. Fifty-nine references were selected from five databases. It was found that several studies supported that telepsychiatry has improved access and quality of care available in rural environments. At the same time, telepsychiatry in mental healthcare has not been utilized as it should in rural adult populations due to lack of access, an overall shortage of providers, and poor distribution of psychiatrists. There are numerous benefits to implementing telepsychiatry in rural areas. While there are still barriers that prevent widespread utilization, telepsychiatry can improve mental health outcomes by linking rural patients to high-quality mental healthcare services that follow evidence-based care and best practices. Telepsychiatry utilization in rural areas in the United States has demonstrated to have a significant ability to transform mental health care delivery and clinician productivity. As technology continues to advance access, telepsychiatry will also advance, making access more readily available.
农村地区医疗保健专业人员的短缺程度高于平均水平。许多挑战限制了获得精神卫生服务的机会。其中一些障碍包括交通、医疗服务提供者的数量、贫困和缺乏保险。最近,远程精神病学在农村地区的应用有所增加。本综述的目的是确定和汇总远程精神病学对生活在美国农村社区的成年人的益处,以确定远程精神病学是否改善了护理的可及性和质量。本研究的方法是采用系统的方法进行文献综述。参考文献和来源均以英文撰写,并取自2004年至2018年在美国进行的研究,以保持本综述的最新状态。从5个数据库中选取59篇文献。有几项研究表明,远程精神病学改善了农村环境中可获得的医疗服务的可及性和质量。与此同时,由于缺乏机会、提供者总体短缺以及精神科医生分布不佳,精神保健领域的远程精神病学在农村成年人口中没有得到应有的利用。在农村地区实施远程精神病学有许多好处。虽然仍然存在阻碍广泛使用的障碍,但远程精神病学可以通过将农村患者与遵循循证护理和最佳做法的高质量精神保健服务联系起来,从而改善精神健康结果。远程精神病学在美国农村地区的应用已被证明具有显著的能力来改变精神卫生保健服务的提供和临床医生的生产力。随着技术的不断进步,远程精神病学也将进步,使人们更容易获得。
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引用次数: 1
Heterogeneous Weighted Voting-Based Ensemble (HWVE) for Root-Cause Analysis 基于异构加权投票的根本原因分析集成(HWVE)
Pub Date : 2020-10-01 DOI: 10.4018/jitr.2020100105
B. Selvam, S. Ravimaran, S. Sheba
Root-cause analysis has been one of the major requirements of the current information-rich world due to the huge number of opinions available online. This paper presents a heterogeneous weighted voting-based ensemble (HWVE) model for root-cause analysis. The proposed model is composed of an aspect extraction and filtering module, a model-based sentiment identification module, and a ranking module. Domain-based aspect ontologies are created using the available training data and is used for categorization. The input data is passed to the HWVE model for opinion identification and is in-parallel passed to the significance identification phase for aspect identification. The identified aspects are combined with their corresponding sentiments and ranked based on their ontological occurrence levels to provide the final categorized root-causes. Experiments were performed with the five-product dataset, and comparisons were performed with recent models. Results indicate that the proposed model exhibits improved performances of 5%-13% in terms of F-measure when compared to other models.
由于网上有大量的意见,根本原因分析已经成为当前信息丰富世界的主要需求之一。本文提出了一种基于异构加权投票的集成(HWVE)根本原因分析模型。该模型由方面提取和过滤模块、基于模型的情感识别模块和排序模块组成。基于领域的方面本体是使用可用的训练数据创建的,并用于分类。输入数据被传递给HWVE模型以进行意见识别,并并行地传递给重要性识别阶段以进行方面识别。将已识别的方面与其相应的情绪结合起来,并根据其本体论发生级别进行排序,以提供最终分类的根本原因。实验用五种产品数据集进行,并与最近的模型进行了比较。结果表明,与其他模型相比,所提出的模型在F-measure方面的性能提高了5%-13%。
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引用次数: 0
Modelling Virtual Machine Workload in Heterogeneous Cloud Computing Platforms 异构云计算平台中虚拟机工作负载建模
Pub Date : 2020-10-01 DOI: 10.4018/jitr.20201001.oa1
Suliman Mohamed Fati, A. Jaradat, I. Abunadi, Ahmed Sameh Mohammed
Cloud computing, as a trend technology, has stemmed from the concept of virtualization. Virtualization makes the resources available to the public to use without any concern for ownership or maintenance cost. In addition, the hosted applications in cloud computing platforms are highly interactive and require intensive resources. The new trend is to duplicate these applications in multiple virtual machines based on demand. Such a scheme needs an efficient resource provisioning to manage the resource assignment to multiple virtual machines properly. One of the issues in the current resource provisioning technique is assigning the resources proactively without predicting the workload of hosted applications, which cause load imbalance and resource wasting. Thus, this paper proposes a new model to predict the application workload. The experimental results show the ability of the proposed model to allocate more virtual machines and to balance the workload among the physical machines.
云计算作为一种趋势技术,起源于虚拟化的概念。虚拟化使资源可供公众使用,而无需考虑所有权或维护成本。此外,云计算平台上托管的应用程序交互性强,需要大量的资源。新的趋势是根据需求在多个虚拟机中复制这些应用程序。这种方案需要有效的资源分配,以正确地管理多个虚拟机的资源分配。当前资源供应技术中的一个问题是,在不预测托管应用程序的工作负载的情况下主动分配资源,这会导致负载不平衡和资源浪费。因此,本文提出了一个预测应用程序工作负载的新模型。实验结果表明,该模型能够分配更多的虚拟机,并在物理机之间平衡工作负载。
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引用次数: 3
A "New" View of Proof-of-Concept Practices Through the Lenses of Activity Theory and Hermeneutics 从活动理论和解释学的角度看概念证明实践的“新”观点
Pub Date : 2020-10-01 DOI: 10.4018/jitr.2020100108
Antonio Jose Rodrigues Neto, M. M. Borges, Licinio Gomes Roque
In this study, the authors acknowledge Proof-of-Concept (PoC) as an activity with a set of practices performed by its practitioners and consumed by organizations that aim to explore new products or technologies and achieve knowledge production and consumption. PoC practices are poorly explored and characterized in the scientific literature. The motivation of this research is the clarification of an approach to PoC. This article introduces a “new” and different view of PoC practices using Activity Theory and Hermeneutics. The authors debate that it is not possible to understand the whole PoC until its constituent parts and context have been understood. Therefore, the process of appropriation of knowledge in PoC occurs in social interaction between one practitioner and another, through an activity that is mediated in the relations between those practitioners, and an activity between the triad—subject (practitioner), object of learning (outcome), and mediating artifacts—with the aim of improving PoC practices.
在本研究中,作者承认概念验证(PoC)是一种活动,由其实践者执行一系列实践,并由旨在探索新产品或技术并实现知识生产和消费的组织使用。PoC实践在科学文献中很少被探索和描述。本研究的动机是澄清PoC的一种方法。本文运用活动理论和解释学,介绍了一种“新”的、不同的PoC实践观点。作者认为,在理解PoC的组成部分和上下文之前,不可能理解整个PoC。因此,PoC中的知识占有过程发生在一个实践者和另一个实践者之间的社会互动中,通过在实践者之间的关系中中介的活动,以及在三元主体(实践者)、学习对象(结果)和中介工件之间的活动,目的是改善PoC实践。
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引用次数: 1
Discrete Total Variation-Based Non-Local Means Filter for Denoising Magnetic Resonance Images 基于离散总变分的非局部均值滤波去噪磁共振图像
Pub Date : 2020-10-01 DOI: 10.4018/jitr.2020100102
N. Joshi, Sarika Jain, Amit Agarwal
Magnetic resonance (MR) images suffer from noise introduced by various sources. Due to this noise, diagnosis remains inaccurate. Thus, removal of noise becomes a very important task when dealing with MR images. In this paper, a denoising method has been discussed that makes use of non-local means filter and discrete total variation method. The proposed approach has been compared with other noise removal techniques like non-local means filter, anisotropic diffusion, total variation, and discrete total variation method, and it proves to be effective in reducing noise. The performance of various denoising methods is compared on basis of metrics such as peak signal-to-noise ratio (PSNR), mean square error (MSE), universal image quality index (UQI), and structure similarity index (SSIM) values. This method has been tested for various noise levels, and it outperformed other existing noise removal techniques, without blurring the image.
磁共振(MR)图像受到各种来源引入的噪声的影响。由于这种噪音,诊断仍然不准确。因此,在处理MR图像时,去噪成为一项非常重要的任务。本文讨论了一种利用非局部均值滤波和离散全变分法进行信号去噪的方法。将该方法与非局部均值滤波、各向异性扩散、全变分法和离散全变分法等降噪方法进行了比较,证明了该方法的降噪效果。基于峰值信噪比(PSNR)、均方误差(MSE)、通用图像质量指数(UQI)和结构相似指数(SSIM)等指标,比较了各种去噪方法的性能。这种方法已经在各种噪声水平下进行了测试,并且它优于其他现有的去噪技术,而不会使图像模糊。
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引用次数: 4
Gamification and Its Application in the Social Environment: A Tool for Shaping Behaviour 游戏化及其在社会环境中的应用:塑造行为的工具
Pub Date : 2020-07-01 DOI: 10.4018/jitr.2020070104
Staling Cordero-Brito, J. Mena
This study sets out to conduct a systematic review of the emergence and evolution of gamification in the social environment, its main components, and its application as a learning tool through the motivation and engagement it generates in people. The results were obtained by consulting two major scientific databases, namely, Scopus and the Web of Science, which provided 136 articles published on the social environment from 2011 through to mid-2016 using the term gamification. The results of this study reveal how over time gamification has been gaining importance in the social environment through the use of its components. The highest number of scientific publications come from the United States and Spain. In addition, the use of gaming components increases motivation and engagement. It shows how gamification uses (individual or group) rewards according to the context to achieve the proposed objectives, being successfully implemented in education, health, services, and social learning.
本研究旨在对游戏化在社会环境中的出现和演变、游戏化的主要组成部分以及游戏化作为一种学习工具的应用(通过游戏化在人们中产生的动机和参与度)进行系统回顾。这一结果是通过查阅两个主要的科学数据库,即Scopus和Web of Science获得的,这两个数据库提供了从2011年到2016年中期使用“游戏化”一词发表的136篇关于社会环境的文章。这项研究的结果揭示了随着时间的推移,游戏化如何通过使用其组件在社会环境中变得越来越重要。发表最多科学论文的国家是美国和西班牙。此外,游戏组件的使用还能提高动机和用户粘性。它展示了游戏化如何根据情境使用(个人或团体)奖励来实现所提出的目标,并成功地在教育、卫生、服务和社会学习中实施。
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引用次数: 4
Supervised Sentiment Analysis of Science Topics: Developing a Training Set of Tweets in Spanish 科学主题的监督情感分析:开发西班牙语推文训练集
Pub Date : 2020-07-01 DOI: 10.4018/jitr.2020070105
Patricia Sánchez-Holgado, C. A. Calderón
Twitter is one of the largest sources of real-time information on the Internet and is continuously fed by millions of users around the world. Each of these users publishes text messages with their opinions, concerns, information, or simply their daily happenings. It is a challenge to address the analysis of massive data in the network, just as it is an objective to look for ways to understand everything that data can offer today in terms of knowledge of society and the market. The sector of science communication is still discovering everything that the web 2.0 and social networks can offer to reach all audiences. This article develops a classification model of messages launched on Twitter, on science topics, in Spanish, with machine learning techniques. The training of this type of models requires the creation of a specific corpus in Spanish for the subject of science, which is one of the most laborious tasks. The classifier is able to predict the sentiment of the message in real time on Twitter, with a confidence interval greater than 80%. The results of its evaluation are at 72% accuracy.
Twitter是互联网上最大的实时信息来源之一,世界各地数以百万计的用户不断为其提供信息。这些用户中的每个人都会发布文本消息,其中包含他们的观点、关注点、信息,或者仅仅是他们的日常事件。对网络中的海量数据进行分析是一项挑战,就像从社会和市场的知识角度寻找理解数据所能提供的一切的方法是一项目标一样。科学传播领域仍在探索web2.0和社交网络所能提供的一切,以接触到所有的受众。本文利用机器学习技术开发了一个在Twitter上发布的关于西班牙语科学主题的信息分类模型。这类模型的训练需要为科学主题创建一个特定的西班牙语语料库,这是最费力的任务之一。该分类器能够实时预测Twitter上消息的情绪,置信区间大于80%。其评价结果的准确率为72%。
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引用次数: 5
Social Climate and Classroom Adaptations for Blended Learning Practices 混合式学习实践的社会氛围和课堂适应
Pub Date : 2020-07-01 DOI: 10.4018/jitr.2020070101
Thaisa Sampaio Sarmento, A. S. Gomes, F. Moreira
Spatial conditions influence social relations and the development of cultural bonds inside a building. The traditional configuration of most school classrooms must be reconsidered to allow for changes in the educational paradigm to support ICT for learning. It is not clear which environmental aspects should be modified to improve performance in physical learning environments (LE), especially to accommodate hybrid models in classrooms. This article describes the process used to understand education conditions for attending to student needs, the connection between the LE, new technologies, and a social climate favourable to educational changes. This study was carried out in a public secondary school in North-eastern Brazil and adopted a design science research method to perform a participatory design exercise, to develop new classroom environment concepts. The results suggest a set of guidelines for LE suitable for active learning methods, considering activities modalities and environment quality criteria, focused on positive social climate conditions and on ergonomic recommendations.
空间条件影响着建筑内部的社会关系和文化纽带的发展。大多数学校教室的传统配置必须重新考虑,以允许教育范式的变化,以支持ICT的学习。目前尚不清楚应该修改哪些环境因素以提高物理学习环境(LE)的表现,特别是适应教室中的混合模式。本文描述了用于理解满足学生需求的教育条件、LE、新技术和有利于教育变革的社会气候之间的联系的过程。本研究在巴西东北部的一所公立中学进行,采用设计科学研究方法进行参与式设计练习,以开发新的课堂环境概念。研究结果提出了一套适用于主动学习方法的指导方针,考虑到活动方式和环境质量标准,重点关注积极的社会气候条件和人体工程学建议。
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引用次数: 1
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J. Inf. Technol. Res.
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