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Obituary – Conrad Mueller 讣告 - 康拉德-穆勒
Q3 Social Sciences Pub Date : 2023-12-14 DOI: 10.18489/sacj.v35i2.17440
Robert L. Baber, Yinong Chen, Scott Hazelhurst, P. Machanick, Sarah Rauchas
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引用次数: 0
Virtual learner experience (VLX) 虚拟学习体验(VLX)
Q3 Social Sciences Pub Date : 2023-12-14 DOI: 10.18489/sacj.v35i2.17442
Johanna Steynberg, J. van Biljon, Colin Pilkington
Science educators need tools to assess to what extent learners’ knowledge can be transferred to novel real-world situations. Virtual reality learning environments (VRLEs) offer the possibility of creating authentic tools where situated learning and assessment can take place, but there is a lack of evidence-based guidelines to inform the design and development of the VRLEs focussing on the user, that is the learner experience, especially for secondary schools. Drawing on theoretical premises and guidelines from user experience, usability, and technologically enabled assessment literature, we designed, developed, evaluated, and refined a VRLE prototype for the authentic assessment of knowledge transfer in the secondary school science classroom as guided by the design science research approach. Lessons learnt from the implementation and iterative evaluation of the prototype are presented as a set of literature-based, empirically validated guidelines to support and guide educational designers and developers to create VRLEs focused on supporting the learner experience. The contribution of this study is a VRLE design model with the learner at its core, the definition of VLX to include learner-specific aspects of immersive environments, and guidelines for the development of an effective and efficient virtual reality environment for the assessment of knowledge transfer in science education.
科学教育工作者需要一些工具来评估学习者的知识在多大程度上可以迁移到新颖的真实世界情境中。虚拟现实学习环境(VRLEs)提供了创建真实工具的可能性,在这种环境中可以进行情景学习和评估,但缺乏基于证据的指导方针来指导虚拟现实学习环境的设计和开发,特别是对中学而言,这种环境关注的是用户,即学习者的体验。借鉴用户体验、可用性和技术化评估文献中的理论前提和指导原则,我们在设计科学研究方法的指导下,设计、开发、评估和改进了一个虚拟现实学习环境原型,用于在中学科学课堂上对知识迁移进行真实评估。从原型的实施和迭代评估中汲取的经验教训将作为一套以文献为基础、经过经验验证的指导原则呈现出来,以支持和指导教育设计者和开发者创建专注于支持学习者体验的 VRLE。本研究的贡献在于建立了一个以学习者为核心的虚拟现实学习环境设计模型,定义了虚拟现实学习环境(VLX)以包括沉浸式环境中学习者的特定方面,并为开发有效和高效的虚拟现实学习环境提供了指导,以评估科学教育中的知识传授。
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引用次数: 0
Online Platform Privacy Policies 在线平台隐私政策
Q3 Social Sciences Pub Date : 2023-12-14 DOI: 10.18489/sacj.v35i2.17443
Kimberley Mugadza, G. Mwalemba
In January 2021, Meta (then Facebook) published an update to its WhatsApp privacy policy which included, among other things, a decision to share some user data with Facebook. This action, together with previous events like the notorious Cambridge-Analytica data breach, has sparked debates about the protection of online privacy, specifically the balance of rights and responsibilities relevant to the protection of social media user data. This qualitative study contributes to that debate by exploring the perceptions and reactions of South African WhatsApp users to these policy changes. The findings highlight the significance of platforms like WhatsApp in the daily socio-economic activities of users in developing countries. This reliance on social media for communication and access to vital information creates an imbalance of power between users and platform owners. The situationis worsened by the lack of effective regulatory frameworks that governments and institutions in developing countries can use to enforce their privacy laws, leaving users vulnerable to potential exploitation from digital platforms. This study contributes to the broader discourse on safeguarding online privacy as Western technology companies continue to gain access to data that is generated by an ever-increasing global user base.
2021 年 1 月,Meta(当时的 Facebook)发布了 WhatsApp 隐私政策更新,其中包括决定与 Facebook 共享部分用户数据。这一行动,加上之前臭名昭著的剑桥-Analytica 数据泄露等事件,引发了关于保护在线隐私的讨论,特别是与保护社交媒体用户数据相关的权利和责任的平衡问题。本定性研究通过探讨南非 WhatsApp 用户对这些政策变化的看法和反应,为这场辩论做出了贡献。研究结果凸显了 WhatsApp 等平台在发展中国家用户日常社会经济活动中的重要性。这种依赖社交媒体进行交流和获取重要信息的方式造成了用户与平台所有者之间权力的不平衡。由于发展中国家的政府和机构缺乏有效的监管框架来执行其隐私法,使得情况更加恶化,用户很容易受到数字平台的潜在剥削。随着西方科技公司不断获取日益增长的全球用户群所产生的数据,本研究为有关保护网络隐私的广泛讨论做出了贡献。
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引用次数: 0
Spectrum-Aware Transitive On-Demand Routing Protocol for Military Cognitive Radio Ad Hoc Networks 面向军用认知无线电 Ad Hoc 网络的频谱感知传递式按需路由协议
Q3 Social Sciences Pub Date : 2023-12-14 DOI: 10.18489/sacj.v35i2.17389
Phetho Phaswana, M. Velempini
The advancement of wireless technology is increasing the demand for scarce spectrum. Cognitive radio ad hoc networks (CRAHNs) were proposed as a solution to spectrum scarcity which is also deployed in combat. However, military cognitive radio ad-hoc networks (MCRAHNs) are subject to destruction and frequent link breakages. The challenge with MCRAHNs routing is the timing-out of packets. This paper proposes the spectrum-aware transitive multi-cast on-demand distance vector (SAT-MAODV), optimised for throughput and delay. The relay nodes are selected based on zonal data and mobility. This is achieved through handshaking and sharing of location data. The nodes are expected to store location data of nodes encountered, which is used in routing and in determining the movement of the node. The mobility of military nodes is organised and structured, which simplifies routing. The SAT-MAODV was evaluated in network simulator 2 and the results show that the scheme is effective. UsingSAT-MAODV instead of xWCETT reduced routing path and node relay delay by at least 65% and 13% respectively, and increased achievable throughput by 31%. It also improved the delivery ratio by 9% while reducing latency by 27% in comparison with MARSA.
无线技术的发展增加了对稀缺频谱的需求。认知无线电特设网络(CRAHNs)作为解决频谱稀缺问题的方案被提出,并被部署在作战中。然而,军用认知无线电 ad-hoc 网络(MCRAHNs)会遭到破坏,链路也会频繁断开。MCRAHNs 路由面临的挑战是数据包超时。本文提出了频谱感知多播按需距离矢量(SAT-MAODV),对吞吐量和延迟进行了优化。中继节点根据区域数据和移动性进行选择。这是通过握手和共享位置数据实现的。节点应存储所遇节点的位置数据,用于路由选择和确定节点的移动。军事节点的移动是有组织、有结构的,这简化了路由选择。在网络模拟器 2 中对 SAT-MAODV 进行了评估,结果表明该方案是有效的。使用 SAT-MAODV 替代 xWCETT 可将路由路径和节点中继延迟分别减少至少 65% 和 13%,并将可实现吞吐量提高 31%。与 MARSA 相比,它还提高了 9% 的送达率,同时减少了 27% 的延迟。
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引用次数: 0
Ontology-Driven Computer Systems 本体驱动的计算机系统
Q3 Social Sciences Pub Date : 2023-12-14 DOI: 10.18489/sacj.v35i2.17445
Mykola G. Petrenko, Ellen Cohn, O. Shchurov, Kyrylo Malakhov
This article delves into the evolving frontier of ontology-driven natural language information processing. Through an in-depth examination, we put forth a novel linguistic processor architecture, uniquely integrating linguistic and ontological paradigms during semantic analysis. Distancing from conventional methodologies, our approach showcases a profound merger of knowledge extraction and representation techniques. A central highlight of our research is the development of an ontology-driven information system, architected with an innate emphasis on self-enhancement and adaptability. The system’s salient capability lies in its adept handling of elementary knowledge, combined with its dynamic aptitude to foster innovative concepts and relationships. A particular focus is accorded to the system’s application in scientific information processing, signifying its potential in revolutionising knowledge-based applications within scientific domains. Through our endeavours, we aim to pave theway for more intuitive, precise, and expansive ontology-driven tools in the realm of knowledge extraction and representation.
本文深入探讨了本体驱动的自然语言信息处理这一不断发展的前沿领域。通过深入研究,我们提出了一种新颖的语言处理器架构,在语义分析过程中独特地整合了语言学和本体论范式。与传统方法不同,我们的方法展示了知识提取和表征技术的深度融合。我们研究的一个核心亮点是开发了一个本体驱动的信息系统,该系统的架构强调自我增强和适应性。该系统的突出能力在于其对基本知识的熟练处理,以及其培养创新概念和关系的动态能力。我们特别关注该系统在科学信息处理方面的应用,这标志着它在革新科学领域基于知识的应用方面的潜力。通过我们的努力,我们的目标是在知识提取和表示领域为更直观、更精确、更广泛的本体驱动工具铺平道路。
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引用次数: 0
The Influence of Change Management Process on Cloud Transitioning 变革管理流程对云过渡的影响
Q3 Social Sciences Pub Date : 2023-12-14 DOI: 10.18489/sacj.v35i2.17441
Rito Miyen, C. Marnewick
Technology is a dynamic field with constant changes, improvements, and new discoveries even before anyone is fully comfortable or used to the way it was. Cloud computing has gained momentum with the migration to the cloud growing at an incremental rate each year. However, some organisations migrate prematurely without fully understanding the impact on various factors. This research focuses on the influence of change management processes on cloud transitioning. The study included the feasibility of using COBIT to adequately manage organisational change when migrating to the cloud. The quantitative research methodology used a survey where the concept of cloud computing and applying COBIT in the context of organisational change were explored. A combination of these concepts was necessary as these had not been explored in other studies. A correlation coefficient analysis was performed to determine the relationship between COBIT’s change management processes and the success rate of cloud computing. The results of this research suggest that there is a relationship between change management processes and the success rate of cloud computing. Future research could include the creation of a cloud-readiness assessment model to assist businesses to make an informed decisions when migrating to the cloud.
技术是一个充满活力的领域,不断变化、改进和新发现,甚至在人们还没有完全适应或习惯于原来的方式之前。随着向云计算迁移的速度逐年递增,云计算的发展势头也越来越好。然而,一些组织在没有充分了解各种因素的影响的情况下过早迁移。本研究的重点是变革管理流程对云过渡的影响。研究内容包括在向云迁移时使用 COBIT 充分管理组织变革的可行性。定量研究方法采用了调查的形式,在调查中探讨了云计算的概念和在组织变革中应用 COBIT 的问题。由于其他研究未对这些概念进行探讨,因此有必要将其结合起来。通过相关系数分析,确定了 COBIT 变更管理流程与云计算成功率之间的关系。研究结果表明,变更管理流程与云计算成功率之间存在关系。未来的研究可以包括创建云计算准备评估模型,以帮助企业在迁移到云计算时做出明智的决策。
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引用次数: 0
Natural Language-Driven Dialogue Systems for Support in Physical Medicine and Rehabilitation 自然语言驱动的对话系统为物理医学和康复提供支持
Q3 Social Sciences Pub Date : 2023-12-14 DOI: 10.18489/sacj.v35i2.17444
Vladislav Kaverinsky, Kyrylo Malakhov
This paper presents a natural language-driven dialogue system designed to support healthcare professionals and students in the field of physical medicine and rehabilitation. The system seamlessly integrates concepts from intelligent information systems, data mining, ontologies, and human-computer interaction, employing at its core a rule-based dialogue mechanism. The system harnesses the power of ontology-based graph knowledge, underscoring its domain-specific efficacy. This article delves into the automated knowledge base formation, utilising Python scripts to translate EBSCO’s dataset of articles on physical medicine and rehabilitation into an OWL ontology. This methodology ensures adaptability to the ever-evolving landscape of medical insights. The system’s approach to natural language processing encompasses text preprocessing, semantic category discernment, andSPARQL query creation, providing 26 predefined categories. As an innovation in performance optimisation, the system integrates a strategy to cache precomputed responses using a PostgreSQL database, which aids in resource conservation and reduction in query execution latency. The system’s user engagement avenues are further detailed, showcasing a Telegram bot and an API, enhancing accessibility and user experience. In essence, this article illuminates an advanced, efficient dialogue system for physical medicine and rehabilitation, synthesising multiple computational paradigms, and standing as a beacon for healthcare practitioners and students alike.
本文介绍了一个自然语言驱动的对话系统,旨在为物理医学和康复领域的医护人员和学生提供支持。该系统无缝集成了智能信息系统、数据挖掘、本体论和人机交互等概念,其核心是基于规则的对话机制。该系统利用了基于本体的图式知识的力量,突出了其特定领域的功效。本文深入探讨了自动知识库的形成,利用 Python 脚本将 EBSCO 的物理医学和康复文章数据集转化为 OWL 本体。这种方法确保了对不断发展的医学见解的适应性。该系统的自然语言处理方法包括文本预处理、语义类别识别和 SPARQL 查询创建,提供 26 个预定义类别。作为性能优化方面的一项创新,该系统整合了一种使用 PostgreSQL 数据库缓存预计算响应的策略,这有助于节约资源和减少查询执行延迟。文章还进一步详细介绍了该系统的用户参与途径,展示了 Telegram 机器人和应用程序接口,从而增强了可访问性和用户体验。从本质上讲,这篇文章为物理医学和康复阐明了一种先进、高效的对话系统,综合了多种计算范式,是医疗从业人员和学生的指路明灯。
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引用次数: 0
Editorial: A new era for SACJ 社论:南部非洲警察局的新时代
Q3 Social Sciences Pub Date : 2023-12-14 DOI: 10.18489/sacj.v35i2.17439
K. Malan
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引用次数: 0
Challenges of Implementing Enterprise Resource Planning and The Role of Knowledge Management 实施企业资源规划的挑战和知识管理的作用
Q3 Social Sciences Pub Date : 2023-12-14 DOI: 10.18489/sacj.v35i2.17410
N. Zuma, Ntandoyenkosi Sibindi
Using the National Youth Development Agency (NYDA) as a case study, this paper considers the challenges of implementing enterprise resource planning (ERP). Data was collected from management and employees using both qualitative and quantitative research techniques. The study established challenges beyond the technical issues, these included: misalignment of the system to the organisation processes, product quality and unavailability of the system’s helpdesk, lack of top management support, and lack of pilot testing, insufficient end-user training, resistance to change management, lack of processes integration, poor  technology planning and security and risk matters. Furthermore, the management process that resonates on knowledge transfer, knowledge management, and change management poses a complex challenge in the implementation of ERP. The study  recommends the alignment of the user environment, effective change management, and knowledge strategies that are essential to drive ERP. It is also recommended to close the gap between what ERP offers and what end users want and can do.
本文以国家青年发展署(NYDA)为案例,探讨了实施企业资源规划(ERP)所面临的挑战。采用定性和定量研究技术,从管理层和员工那里收集了数据。研究确定了技术问题之外的挑战,其中包括:系统与组织流程的不匹配、产品质量和系统服务台的不可用性、缺乏高层管理人员的支持、缺乏试点测试、最终用户培训不足、对变革管理的抵制、缺乏流程整合、技术规划不完善以及安全和风险问题。此外,在知识转移、知识管理和变革管理方面产生共鸣的管理流程,也给企业资源规划系统的实施带来了复杂的挑战。研究建议调整用户环境、有效的变革管理和知识战略,这对推动企业资源规划系统至关重要。研究还建议缩小企业资源规划所提供的服务与最终用户的需求和能力之间的差距。
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引用次数: 0
Covid-19 pandemic: A necessary catalyst for e-learning adoption and application 新冠肺炎大流行:电子学习采用和应用的必要催化剂
Q3 Social Sciences Pub Date : 2023-07-31 DOI: 10.18489/sacj.v35i1.1080
Ndiyakholwa Ngqulu, Phumzile Nomnga
The Covid-19 pandemic brought the world to a grinding halt, adversely affecting almost every sector including the post school education and training (PSET) sector. The South African PSET sector is no exception. The academic enterprise was abruptly disrupted and led to a serious loss of teaching and learning time as the government passed new regulations discouraging movement and physical meetings of people. The state of disaster regulations and lockdown directives pronounced during March 2020 by the South African government presented an unprecedented way of operating since the formation of many higher education institutions (HEIs). This study assesses the state of e-learning before and after the first six weeks of lockdown regulations in two HEIs, using a theoretical framework of e-learning system readiness assessment and a participatory research approach. The study reveals a state of under-preparedness by HEIs to operate under the lockdown regulations, due to the adopted blended learning policy implementation gap. Based on these findings, the study concludes with an argument that the Covid-19 pandemic presented a great opportunity for HEIs not only to adopt e-learning at the policy level but also to adapt to the new e-learning methods and practices and thus prepare universities for times of uncertainty.
新冠肺炎大流行使世界陷入严重停滞,对几乎所有部门都产生了不利影响,包括课后教育和培训(PSET)部门。南非PSET部门也不例外。由于政府通过了不鼓励人员流动和身体接触的新规定,学术事业突然中断,导致教学和学习时间严重损失。自许多高等教育机构成立以来,南非政府在2020年3月宣布的灾难状态条例和封锁指令提供了前所未有的运作方式。本研究使用电子学习系统准备情况评估的理论框架和参与式研究方法,评估了两所高等教育机构在封锁规定的前六周前后的电子学习状况。该研究表明,由于采用的混合学习政策实施差距,高等教育机构在封锁规定下运作的准备不足。基于这些发现,该研究得出结论,认为新冠肺炎大流行为高等院校提供了一个巨大的机会,不仅可以在政策层面采用电子学习,还可以适应新的电子学习方法和实践,从而为大学应对不确定时期做好准备。
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引用次数: 0
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South African Computer Journal
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