South African Computer Journal最新文献

South African Computer Journal Pub Date : 2023-12-14 DOI: 10.18489/sacj.v35i2.17440

Robert L. Baber, Yinong Chen, Scott Hazelhurst, P. Machanick, Sarah Rauchas

引用次数: 0

Virtual learner experience (VLX) 虚拟学习体验（VLX）

South African Computer Journal Pub Date : 2023-12-14 DOI: 10.18489/sacj.v35i2.17442

Johanna Steynberg, J. van Biljon, Colin Pilkington

{"title":"Virtual learner experience (VLX)","authors":"Johanna Steynberg, J. van Biljon, Colin Pilkington","doi":"10.18489/sacj.v35i2.17442","DOIUrl":"https://doi.org/10.18489/sacj.v35i2.17442","url":null,"abstract":"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.","PeriodicalId":55859,"journal":{"name":"South African Computer Journal","volume":"9 13","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138972426","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

Online Platform Privacy Policies 在线平台隐私政策

South African Computer Journal Pub Date : 2023-12-14 DOI: 10.18489/sacj.v35i2.17443

Kimberley Mugadza, G. Mwalemba

{"title":"Online Platform Privacy Policies","authors":"Kimberley Mugadza, G. Mwalemba","doi":"10.18489/sacj.v35i2.17443","DOIUrl":"https://doi.org/10.18489/sacj.v35i2.17443","url":null,"abstract":"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.","PeriodicalId":55859,"journal":{"name":"South African Computer Journal","volume":"563 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138974108","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

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

South African Computer Journal Pub Date : 2023-12-14 DOI: 10.18489/sacj.v35i2.17389

Phetho Phaswana, M. Velempini

{"title":"Spectrum-Aware Transitive On-Demand Routing Protocol for Military Cognitive Radio Ad Hoc Networks","authors":"Phetho Phaswana, M. Velempini","doi":"10.18489/sacj.v35i2.17389","DOIUrl":"https://doi.org/10.18489/sacj.v35i2.17389","url":null,"abstract":"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.","PeriodicalId":55859,"journal":{"name":"South African Computer Journal","volume":"2011 35","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139001939","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

Ontology-Driven Computer Systems 本体驱动的计算机系统

South African Computer Journal Pub Date : 2023-12-14 DOI: 10.18489/sacj.v35i2.17445

Mykola G. Petrenko, Ellen Cohn, O. Shchurov, Kyrylo Malakhov

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

South African Computer Journal Pub Date : 2023-12-14 DOI: 10.18489/sacj.v35i2.17441

Rito Miyen, C. Marnewick

{"title":"The Influence of Change Management Process on Cloud Transitioning","authors":"Rito Miyen, C. Marnewick","doi":"10.18489/sacj.v35i2.17441","DOIUrl":"https://doi.org/10.18489/sacj.v35i2.17441","url":null,"abstract":"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.","PeriodicalId":55859,"journal":{"name":"South African Computer Journal","volume":"765 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138974008","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

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

South African Computer Journal Pub Date : 2023-12-14 DOI: 10.18489/sacj.v35i2.17444

Vladislav Kaverinsky, Kyrylo Malakhov

{"title":"Natural Language-Driven Dialogue Systems for Support in Physical Medicine and Rehabilitation","authors":"Vladislav Kaverinsky, Kyrylo Malakhov","doi":"10.18489/sacj.v35i2.17444","DOIUrl":"https://doi.org/10.18489/sacj.v35i2.17444","url":null,"abstract":"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.","PeriodicalId":55859,"journal":{"name":"South African Computer Journal","volume":"176 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139002344","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

Editorial: A new era for SACJ 社论：南部非洲警察局的新时代

South African Computer Journal Pub Date : 2023-12-14 DOI: 10.18489/sacj.v35i2.17439

K. Malan

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

South African Computer Journal Pub Date : 2023-12-14 DOI: 10.18489/sacj.v35i2.17410

N. Zuma, Ntandoyenkosi Sibindi

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

South African Computer Journal Pub Date : 2023-07-31 DOI: 10.18489/sacj.v35i1.1080

Ndiyakholwa Ngqulu, Phumzile Nomnga

{"title":"Covid-19 pandemic: A necessary catalyst for e-learning adoption and application","authors":"Ndiyakholwa Ngqulu, Phumzile Nomnga","doi":"10.18489/sacj.v35i1.1080","DOIUrl":"https://doi.org/10.18489/sacj.v35i1.1080","url":null,"abstract":"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.","PeriodicalId":55859,"journal":{"name":"South African Computer Journal","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46173611","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