An OWL-Based Mobile GeoBI Context Ontology Enabling Location-Based and Context-Based Reasoning and Supporting Contextual Business Analysis

Mobile professionals need to be assisted with suitable mobile GeoBI (Geospatial Business Intelligence) systems, which are able to capture, organize and structure the user’s reality into a relevant context model and reason on it. GeoBI context modelling and reasoning are still research issues since there is not yet either a model or a relevant taxonomy regarding GeoBI contextual information. To fill this gap, this paper proposes an extended and detailed OWL-based mobile GeoBI context ontology to provide context-aware applications and users with relevant contextual information and context-based reasoning capabilities. Context quality issues are handled an implementation architecture which is provided.

Smart phone-based context-aware augmentative and alternative communications system

A smartphone-based context-aware augmentative and alternative communication(AAC) was applied was in order to enhance the user's experience by providing simple, adaptive, and intuitive interfaces. Various potential context-aware technologies and AAC usage scenarios were studied, and an efficient communication system was developed by combining smartphone's multimedia functions and its optimized sensor technologies. The experimental results show that context-awareness accuracy is achieved up to 97%.

A Contextual Item-Based Collaborative Filtering Technology

This paper proposes a contextual item-based collaborative filtering technology, which is based on the traditional item-based collaborative filtering technology. In the process of the recommendation, user’s important mobile contextual information are taken into account, and the technology combines with those ratings on the items in the users’ historical contextual information who are familiar with user’s current context information in order to predict that which items will be preferred by user in his or her current context. At the end, an experiment is used to prove that the technology proposed in this paper can predict user’s preference in his or her mobile environment more accurately.

A Destination Based Routing Protocol for Context Based Clusters in VANET

Today, vehicular ad-hoc network (VANET) is a hot research topic due to its many applications like collision avoidance, congestion road notification, parking lot availability, road-side business advertisements, etc. All these applications have hard delay constraints i.e. the messages should reach the target location within certain time limits. So, there must be efficient routing in VANET which meets these delay constraints. In this paper, two techniques are proposed to minimize the data traffic and delay in VANET. Firstly, a context based clustering is proposed which takes into consideration various parameters in cluster formation-location of vehicle, direction of vehicle, velocity of vehicle, interest list of vehicle [1] and destination of vehicle. Secondly, a destination based routing protocol is proposed for these context based clusters for efficient inter-cluster communication.

Approach to Model-Based Development of Context-Aware Application

In order to address challenges posed by advances in mobile computing, ubiquitous devices software engineering, wireless and sensor technologies in many applications running, this paper provides an approach that simplifies the design and the implementation of context-aware Interactive systems called CAISDA (Context-Aware Interactive System Development Approach). This approach is based on the analysis and synthesis of context-aware frameworks proposed in literature.

Understanding Requirement Engineering for Context-Aware Service-Based Applications

Requirements of software systems tend to change over time. The speed of this tendency depends on the application domain the software system under consideration belongs to. If we consider novel contexts such as pervasive systems and systems supporting dynamic B2B interaction, requirements change so fast that the research community is studying how to build systems that are able to self-adapt on the fly to some of these changes. When this happens, the system does not need to undergo through a new development cycle thus increasing its availability and, to a certain extent, its robustness. So far, the research in the area of self-adaptive systems has been focusing on the definition of the mechanisms for supporting self-adaptation. We argue that what is missing now is a structured and robust design process associated to these mechanisms. This design process should include a Requirement Engineering (RE) phase that somewhat differs from the traditional one. However, the identification of requirements for adaptation requires a good knowledge of the context in which the system will be executed. In this work, we consider the modeling of such context as part of the RE phase and we particularly focus on Service-Based Applications (SBAs). We argue that RE activities should be supported at run-time to handle context changes and to support adaptation for SBAs. We survey the state of the art for what concerns the elicitation, modeling, and analysis of requirements and will highlight some issues and challenges in order to support adaptation for SBAs.

Strategy-based Listening Instruction: Possibilities and Impossibilities

Due to the covert nature of the listening process, English listening comprehension has become a demanding challenge for most EFL learners in China. Strategy-based listening instruction, with its more accurate insight into the listening process, could be one of the timely answers to the challenges facing Chinese EFL listeners. Starting with a comprehensive review of theories and studies on strategy-based listening instruction in recent Western academia, the current paper critically examined the possible advantages and the theoretical and practical limitations of strategy-based listening instruction.

Role based access control design using Triadic concept analysis

Role based access control is one of the widely used access control models.There are investigations in the literature that use knowledge representation mechanisms such as formal concept analysis(FCA),description logics,and Ontology for representing access control mechanism.However,while using FCA,investigations reported in the literature so far work on the logic that transforms the three dimensional access control matrix into dyadic formal contexts.This transformation is mainly to derive the formal concepts,lattice structure and implications to represent role hierarchy and constraints of RBAC.In this work,we propose a methodology that models RBAC using triadic FCA without transforming the triadic access control matrix into dyadic formal contexts.Our discussion is on two lines of inquiry.We present how triadic FCA can provide a suitable representation of RBAC policy and we demonstrate how this representation follows role hierarchy and constraints of RBAC on sample healthcare network available in the literature.

Semantic-Based Video Retrieval Survey

There is a tremendous growth of digital data due to the stunning progress of digital devices which facilitates capturing them. Digital data include image, text, and video. Video represents a rich source of information. Thus, there is an urgent need to retrieve, organize, and automate videos. Video retrieval is a vital process in multimedia applications such as video search engines, digital museums, and video-on-demand broadcasting. In this paper, the different approaches of video retrieval are outlined and briefly categorized. Moreover, the different methods that bridge the semantic gap in video retrieval are discussed in more details.

Dynamically Authorized Role-Based Access Control for Grid Applications

Grid computing is concerned with the sharing and coordinated use of diverse resources in distributed “virtual organizations”. The heterogeneous, dynamic and multi-domain nature of these environments makes challenging security issues that demand new technical approaches. Despite the recent advances in access control approaches applicable to Grid computing, there remain issues that impede the development of effective access control models for Grid applications. Among them there are the lack of context-based models for access control, and reliance on identity or capability-based access control schemes. An access control scheme that resolve these issues is presented, and a dynamically authorized role-based access control (D-RBAC) model extending the RBAC with context constraints is proposed. The D-RABC mechanisms dynamically grant permissions to users based on a set of contextual information collected from the system and user’s environments, while retaining the advantages of RBAC model. The implementation architecture of D-RBAC for the Grid application is also described.

Task-based Learning for Teaching Middle School English Learners in China

Task-based teaching has been introduced to many EFL educational settings and has become widely used within those contexts.As a new English teaching approach,it has been evaluated by educators.This essay discusses task-based language teaching within the context of EFL students in a middle school in China.A discription of the context,problems of introducing this approach in this context is demonstrated,followed by an overview of this approach and an evaluation including its advantages and disadvantages weighed by scholars,as well as their opinions on"tasks"and"grammar".The end of this essay provides a discussion of solutions for the problems of using this ap proach within this context.

自然疗愈体系的当代发展及公共健康服务潜力

【目的】探讨自然疗愈(nature-based intervention,NBI)体系作为现代医疗技术的辅助手段在公共健康服务方面的应用潜力并提出未来展望。【方法】通过对自然疗愈蕴含的人类思想脉络和历史发展的梳理,界定自发的疗愈行为与专业化的自然疗法(nature-based therapy,NBT)的界限,揭示自然疗愈体系由民间自发的、依靠自然医学的疗愈方法,演化成为现代专业化、系统化医疗技术辅助手段的社会动因和运行机制,进一步归纳不同国家医疗照护机构中自然疗愈体系的分布与特点。【结果】结合欧美国家自然疗愈重要理论模型,进一步解析自然疗愈作用机制和广泛的健康效能,以及实施场所和服务人群。从历史演变及当代发展趋势来看,自然疗愈体系源自朴素的自然医学和民间传统,有着广泛的社会实施基础,在现代医疗技术的进步和社会需求的变化中,显示出更强大的生命力,具有天然的“平医”结合的良好背景。【结论】自然疗愈体系充分地利用了人与自然环境的同一性和基因同源性,在不同的历史进程中均获得了人类的青睐,成为一种低成本、高产出且科学便捷的疾病恢复和健康促进手段。基于循证研究,建立科学的分类、分级体系,形成完善的园艺实操模块和干预流程,自然疗愈将具有巨大的优势,有望成为人类未来潜在的非药物治疗或替代医学方法。

管理研究的情境基础观:内涵、要素与框架

文章针对传统管理理论范式在解构复杂管理实践上存在的局部性与割裂性缺陷,提出并构建了情境基础观。首先,基于情境理论与传统管理理论范式,提出并解析了情境基础观的概念内涵;其次,解构情境基础观的要素结构,初步描画了由基本要素和独特要素构成的“情境谱系”;再次,通过多重情境要素关系的处理实现“情境深化”,并形成以情境谱系和情境深化相整合的情境化为内核,以“管理实践—情境化—管理理论”为外缘的情境基础观框架;最后,结合多元研究方法,提出理论与情境相协同的本土管理理论构建路径,以期为构建本土管理理论体系以及管理的中国学派作出新的探索。

基于问题情境的心理学实验教学标准化

为了提高学生实验能力和科研素质,采用三层次实验教学标准化体系,改进教学方式,将验证性实验与探索性实验相结合,并实施过程管理,逐步推进教学考核标准化。采用全过程验证性实验考核,显著提升了学生实验设计、数据分析和报告写作能力,尤其是根据美国心理学会(APA)的标准撰写实验报告的能力;引入有指导的、基于问题解决情境的实验教学设计环节,通过探索性实验全过程考核,实现“以学生为中心”的实验教学体系建构。结果表明,学生科研素质与创新能力得到显著提升。

Context-Aware技术在智能网络课程设计中的应用

Context-aware具有自组织性、自适应性和自反馈性,智能网络课程的设计与开发要求教育学、心理学理论和先进的计算机算法的融合.从分析Context-aware技术及其特点入手,将Context-aware应用于网络课程来改变课程教学模式和学生学习方式,提高网络课程的智能化程度及学生的学习效率.

面向IoT安全的MITM攻击防御机制研究

隐蔽性强及攻击方式灵活的中间人(Man-in-the-Middle Attack,MITM)攻击是当前物联网(Internet of Things,IoT)智能家居安全面临的最大安全隐患之一.从攻击与防御两个角度提出了基于上下文感知融合的物联网设备配对模型和基于熵的异构物联设备指纹生成机制,以对抗型思维并行开展监测与防御方案研究,实现了对隐藏安全威胁的感知与过滤,通过相似度阈值分析测试与评估模型的建立完成了设备安全性验证,具有较好的效果与优势.

培养解决真实性问题的素养——欧盟“社会性科学探究式学习”研究

素养导向的教学变革强调提升学生解决真实性问题的素养,而随着教学变革的持续深入,教学实践中问题情境真实性不足的困境愈发凸显,学生创造性解决真实性问题的能力难以得到提升。为此,社会性科学议题由其真实性、争议性、劣构性等特征为创设真实性问题情境提供了新思路。在科技与社会持续发展的背景下,欧盟开启“促进科学教育中负责任研究与创新的实现”项目,开发教学新范式,建构“社会性科学探究式学习”教学框架。此外,项目跨国联合高校、研究机构等先后设计实施多项教师培训计划,致力于提升教师教学能力。借鉴该项目提出的教学框架与教师培训计划,我国可深入挖掘社会性科学议题之于真实性问题情境创设的重要价值,探索其与其他教学方法融合的可行路径;全面优化教师培训项目,助力社会性科学议题教学在我国的本土化实践与创新。

境脉课程:以学习者为中心的校本课程统整实践——以上海交通大学附属中学为例

境脉课程是教师、学生、文本、环境多元互动的、以学习者为中心的课程体系。上海交通大学附属中学积极开展校本课程的统整改革,形成境脉课程理念,遵循课程的系统性、情境化、互动性原则,构建了科技理工实践、创意服务活动和生涯发展规划三大课程群,在课程内容的统整、形式的多样、评价的完善等方面体现了以学习者为中心的课程理念。

游戏化虚拟情境在国际中文教育中的应用——语篇认知与情绪动机的效用视角

随着中国全球影响力的不断提升与国际中文学习需求的日益增长,利用信息技术促进汉语二语学习成为研究热点。研究旨在探究游戏化虚拟情境对国际中文学习者的语篇认知水平和情绪动机的影响。研究采用准实验研究方法,分析了65名学习者在游戏化虚拟情境和常规做题情境下的基础词汇、语篇理解、语言交流意愿和语言学习焦虑的前后测的分数差异。结果显示,实验组在基础词汇和语篇理解方面的后测成绩显著高于对照组,且实验组的词汇和语篇理解后测成绩均显著高于前测。在情绪动机方面,实验组在游戏化虚拟情境中的语言学习焦虑显著降低,而对照组则无显著变化。研究为数字化技术在国际中文教育领域的应用提供了有力的研究证据。

在地化劳动课程:内涵、价值与路径

在地化劳动课程是指以国家劳动文件课程为纲,通过在地化重构劳动课程愿景、丰富劳动课程内容和革新实施路径,将劳动课程同当地境脉相联结以培育学生劳动素养和地方认同的课程形态,具有境脉性、过程性和统整性特征。在地化劳动课程具有多种价值:弥合劳动文件课程与学生经验落差,实现有意义学习;归正劳动教育中的普遍知识与地方知识失衡,延传地方文化;融通学校教育与地方境脉失联,促进学校持续发展;联通劳动素养与地方认同疏离,塑造健全人格。以“培育全面发展的有根人”为逻辑起点,构建高质量在地化劳动课程要做到五点:融入地方诉求,重构在地化劳动课程愿景;整合地方知识,设计在地化劳动课程内容;联动地方力量,规划在地化劳动课程实施;融入地方境脉,拓展在地化劳动实践体验;面向地方境脉,培育教师在地化课程领导力。