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Entrepreneurs' Level of Awareness on Knowledge Management for Promoting Tourism in Nepal 尼泊尔企业家对促进旅游业发展的知识管理意识水平
Pub Date : 2022-04-30 DOI: 10.1142/s021964922250023x
Saramsh Kharel, K. Anup, Niranjan Devkota, U. R. Paudel
Managing knowledge in the field of tourism and the hospitality industry will carry significant importance as most people are not aware of knowledge management (KM) implications. As the importance of knowledge management is not well captured in the tourism sector of Nepal, this study aims to identify the awareness level of knowledge management among the tourism entrepreneurs in Nepal and suggest managerial implications for the same. The primary data were collected through 276[Formula: see text]questionnaire surveys. Tourism entrepreneurs saw the benefits of KM for tourism development despite the costs and challenges it poses. Awareness of knowledge management of entrepreneurs differs according to the people, process, technology, organization structure, and the organization culture dimension. It was further influenced by the demographic characteristics of the tourism entrepreneurs. Enterprises are in more need of knowledge management awareness and several amendments in tourism development policies and programs. Therefore, this study recommends increasing entrepreneurs’ awareness of knowledge management by the joint effort of tourism enterprises and the Nepal Tourism Board. Various knowledge management seminars (integrating tourism experts with tourism entrepreneurs) and training programs should be conducted to manage knowledge effectively.
管理知识在旅游和酒店业领域将具有显著的重要性,因为大多数人都没有意识到知识管理(KM)的含义。由于尼泊尔旅游部门没有很好地捕捉到知识管理的重要性,本研究旨在确定尼泊尔旅游企业家对知识管理的认识水平,并提出同样的管理影响。主要数据是通过276份[公式:见文本]问卷调查收集的。旅游企业家看到了知识管理对旅游发展的好处,尽管它带来了成本和挑战。企业家的知识管理意识因人、流程、技术、组织结构和组织文化维度的不同而不同。旅游业企业家的人口特征进一步影响了这一趋势。企业更需要知识管理意识,需要对旅游发展政策和规划进行若干修改。因此,本研究建议通过旅游企业与尼泊尔旅游局的共同努力,提高企业家的知识管理意识。应举办各种知识管理研讨会(将旅游专家与旅游企业家结合起来)和培训计划,以有效地管理知识。
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引用次数: 4
Are Pair Trading Strategies Profitable During COVID-19 Period? 在COVID-19期间,配对交易策略是否有利可图?
Pub Date : 2022-04-29 DOI: 10.1142/s021964922240010x
Mohammad Khalid Sohail, A. Raheman, Javid Iqbal, M. Sindhu, Abdul Staar, Muhammad Mushafiq, Humaira Afzal
Pair trading strategy is a well-known profitable strategy in stock, forex, and commodity markets. As most of the world stock markets declined during COVID-19 period, therefore this study is going to observe whether this strategy is still profitable after COVID-19 pandemic. One of the powerful algorithms of DBSCAN under the umbrella of unsupervised machine learning is applied and three clusters were formed by using market and accounting data. The formation of these three clusters was based on book value per share, earning per share, classification of sector, market capitalisation and with other factors formed from PCA on the returns of daily data of six months of the 80 sample firms for year 2019–2020. An average of [Formula: see text] average excess monthly return with Sharpe ratio of [Formula: see text] and Treynor ratio of [Formula: see text] is to be observed in COVID-19 pandemic period. However, the result of risk-adjusted performance under Jensen’s alpha is observed to be insignificant. The policy implication of this study, for different portfolios and fund managers is suggested to use machine learning approach to get positive and higher returns for their clients.
配对交易策略是股票、外汇和商品市场中众所周知的盈利策略。由于全球大部分股市在COVID-19期间下跌,因此本研究将观察该策略在COVID-19大流行后是否仍然有利可图。采用无监督机器学习框架下的DBSCAN算法,利用市场数据和会计数据组成三个聚类。这三个集群的形成是基于每股账面价值、每股收益、行业分类、市值以及其他因素,这些因素是根据80家样本公司2019-2020年6个月的每日数据回报通过PCA形成的。以[公式:见文]的夏普比率[公式:见文]和[公式:见文]的特雷纳比率[公式:见文]计算2019冠状病毒病大流行期间[公式:见文]的平均超额月收益的平均值。然而,风险调整后的业绩在Jensen alpha下的结果是不显著的。本研究的政策含义是,对于不同的投资组合和基金经理,建议使用机器学习方法为其客户获得正的和更高的回报。
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引用次数: 1
Social Noise and the Impact of Misinformation on COVID-19 Preventive Measures: Comparative Data Analysis Using Twitter Masking Hashtags 社会噪音和错误信息对COVID-19预防措施的影响:使用Twitter屏蔽标签的比较数据分析
Pub Date : 2022-04-29 DOI: 10.1142/s021964922240007x
Manar Alsaid, Nayana Pampapura Madali
The widespread transmission of misinformation regarding the COVID-19 pandemic on social media has become a severe concern for various reasons such as containing the spread of the virus, taking preventive measures, and so on. According to the recent studies, misinformation and conspiracy theories spread on social media have hampered efforts to limit the infection, which has been exacerbated in some instances by politicians and celebrities. Misunderstandings about COVID-19 and wearing a mask sparked much debate. As time went on, a sizable portion of the population continued to refuse to wear masks, owing to extrinsic considerations, such as politics, ideology, personal views, and health concerns. In this study, we look at the concerns surrounding three Twitter hashtags (#masks, #maskup, and #maskoff) in order to understand better how social noise can lead to unintended misinformation. Sentiment analysis, topic modelling, and contextual analysis were used to compare and contrast two datasets relevant to these hashtags, one gathered in 2020 and the other in 2021. According to sentiment analysis, people’s emotions differed between hashtags, and the majority of tweets were based on social media users’ personal opinions. Topic modelling results revealed the prevalence of social noise leading to the unintended spread of misinformation on Twitter. The content analysis results show that while the #maskoff hashtag is used to resist masking influenced by factors, such as misinformation, conspiracy theories, and ideology, the #masks and #maskup hashtags were generally positive and used more to raise awareness of the benefits of wearing masks.
关于新冠肺炎疫情的错误信息在社交媒体上广泛传播,出于遏制病毒传播、采取预防措施等各种原因,已成为人们严重关注的问题。根据最近的研究,在社交媒体上传播的错误信息和阴谋论阻碍了限制感染的努力,在某些情况下,政治家和名人加剧了这种感染。对COVID-19和戴口罩的误解引发了很多争论。随着时间的推移,由于政治、意识形态、个人观点和健康等外在因素的考虑,相当一部分人继续拒绝戴口罩。在这项研究中,我们研究了围绕三个Twitter标签(#mask, #maskup和#maskoff)的关注,以便更好地理解社会噪音如何导致意想不到的错误信息。使用情感分析、主题建模和上下文分析来比较和对比与这些标签相关的两个数据集,一个收集于2020年,另一个收集于2021年。根据情绪分析,人们的情绪在标签之间是不同的,大多数推文都是基于社交媒体用户的个人观点。话题建模结果显示,社交噪音的普遍存在导致了推特上错误信息的意外传播。内容分析结果显示,#maskoff标签被用来抵制受错误信息、阴谋论和意识形态等因素影响的面具,而#mask和#maskup标签总体上是积极的,更多地用于提高人们对戴面具好处的认识。
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引用次数: 0
A Novel Multilayer Model for Link Prediction in Online Social Networks Based on Reliable Paths 基于可靠路径的在线社交网络链接预测多层模型
Pub Date : 2022-04-29 DOI: 10.1142/s0219649222500253
Fariba Sarhangnia, Nona Ali Asgharzadeholiaee, Milad Boshkani Zadeh
Link Prediction (LP) is one of the critical problems in Online Social Networks (OSNs) analysis. LP is a technique for predicting forthcoming or missing links based on current information in the OSN. Typically, modelling an OSN platform is done in a single-layer scheme. However, this is a limitation which might lead to incorrect descriptions of some real-world details. To overcome this limitation, this paper presents a multilayer model of OSN for the LP problem by analysing Twitter and Foursquare networks. LP in multilayer networks involves performing LP on a target layer benefitting from the structural information of the other layers. Here, a novel criterion is proposed, which calculates the similarity between users by forming intralayer and interlayer links in a two-layer network (i.e. Twitter and Foursquare). Particularly, LP in the Foursquare layer is done by considering the two-layer structural information. In this paper, according to the available information from the Twitter and Foursquare OSNs, a weighted graph is created and then various topological features are extracted from it. Based on the extracted features, a database with two classes of link existence and no link has been created, and therefore the problem of LP has become a two-class classification problem that can be solved by supervised learning methods. To prove the better performance of the proposed method, Katz and FriendLink indices as well as SEM-Path algorithm have been used for comparison. Evaluations results show that the proposed method can predict new links with better precision.
链路预测(Link Prediction, LP)是在线社交网络(Online Social network, osn)分析中的关键问题之一。LP是一种基于OSN中当前信息预测即将到来或缺失的链路的技术。通常,OSN平台的建模是在单层方案中完成的。然而,这是一个限制,可能会导致对一些现实世界细节的不正确描述。为了克服这一局限性,本文通过对Twitter和Foursquare网络的分析,提出了面向LP问题的多层OSN模型。多层网络中的LP涉及利用其他层的结构信息在目标层上执行LP。在这里,我们提出了一个新的标准,它通过在两层网络(即Twitter和Foursquare)中形成层内和层间链接来计算用户之间的相似性。其中,Foursquare层的LP是通过考虑两层结构信息来实现的。本文根据Twitter和Foursquare的可用osn信息,创建一个加权图,然后从中提取各种拓扑特征。基于提取的特征,创建了一个有链路存在和无链路两类的数据库,从而LP问题变成了一个可以用监督学习方法解决的两类分类问题。为了证明该方法具有更好的性能,我们使用Katz和FriendLink指标以及SEM-Path算法进行了比较。评价结果表明,该方法能较好地预测新链接。
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引用次数: 2
Investigating Interdependencies Between Key Features of Lessons Learned: An Integral Approach for Knowledge Sharing 研究经验教训关键特征之间的相互依赖关系:知识共享的整体方法
Pub Date : 2022-04-29 DOI: 10.1142/s0219649222500198
Yawar Abbas, A. Martinetti, Lex Frunt, Jeroen Klinkers, M. Rajabalinejad, L. V. Dongen
While there is a clear consensus in the literature on the need to share lessons learned, it remains unclear how to properly do so. This paper addresses this point and offers insight into how best to incorporate tacitly held social preferences for developing knowledge-sharing strategies. A descriptive survey was conducted to analyse the knowledge sharing practices for lessons learned within the railway sector. Eight variables are investigated that are derived from the four LEAF features: learnability, embraceability, applicability, and findability. This study revealed that for learnability, storytelling and discussion with colleagues are preferred ways to share personal experiences. Trust and the creation of a learning culture emerged as key aspects of embraceability. With regard to applicability, a process-related knowledge-sharing focus for intraorganisational and a content-related focus for interorganisational knowledge domains are preferred. Better technological findability is identified as a key area of improvement. Finally, novel dependencies are established using the chi-square test between key LEAF features.
虽然文献中对分享经验教训的必要性有明确的共识,但如何正确地这样做仍不清楚。本文解决了这一点,并提供了如何最好地将默认的社会偏好纳入发展知识共享策略的见解。进行了一项描述性调查,以分析铁路部门内的知识共享实践经验教训。研究了从LEAF的四个特征派生的八个变量:可学习性、可接受性、适用性和可查找性。这项研究表明,在可学习性方面,讲故事和与同事讨论是分享个人经历的首选方式。信任和学习型文化的创建成为可接受性的关键方面。就适用性而言,优先考虑组织内部与过程相关的知识共享重点和组织间知识领域与内容相关的重点。更好的技术可寻性被确定为一个关键的改进领域。最后,利用关键LEAF特征之间的卡方检验建立新的依赖关系。
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引用次数: 2
Stuttering Disfluency Detection Using Machine Learning Approaches 使用机器学习方法检测口吃障碍
Pub Date : 2022-04-28 DOI: 10.1142/s0219649222500204
Abedal-Kareem Al-Banna, E. Edirisinghe, H. Fang, W. Hadi
Stuttering is a neurodevelopmental speech disorder wherein people suffer from disfluency in speech generation. Recent research has applied machine learning and deep learning approaches to stuttering disfluency recognition and classification. However, these studies have focussed on small datasets, generated by a limited number of speakers and within specific tasks, such as reading. This paper rigorously investigates the effective use of eight well-known machine learning classifiers, on two publicly available datasets (FluencyBank and SEP-28k) to automatically detect stuttering disfluency using multiple objective metrics, i.e. prediction accuracy, recall, precision, F1-score, and AUC measures. Our experimental results on the two datasets show that the Random Forest classifier achieves the best performance, with an accuracy of 50.3% and 50.35%, a recall of 50% and 42%, a precision of 42% and 46%, and an F1 score of 42% and 34%, against the FluencyBank and SEP-28K datasets, respectively. Moreover, we show that the machine learning-based approaches may not be effective in accurate stuttering disfluency evaluation, due to diverse variations in speech rate, and differences in vocal tracts between children and adults. We argue that the use of deep learning approaches and Automatic Speech Recognition (ASR) with language models may improve outcomes, specifically for large scale and imbalanced datasets.
口吃是一种神经发育性语言障碍,患者在言语产生方面存在障碍。最近的研究将机器学习和深度学习方法应用于口吃不流利的识别和分类。然而,这些研究都集中在小数据集上,这些数据集是由有限数量的说话者和特定任务(如阅读)生成的。本文严格研究了八个知名机器学习分类器在两个公开可用数据集(FluencyBank和SEP-28k)上的有效使用,以使用多个客观指标(即预测准确性,召回率,精度,f1分数和AUC度量)自动检测口吃不流利。我们在两个数据集上的实验结果表明,Random Forest分类器在FluencyBank和SEP-28K数据集上的准确率分别为50.3%和50.35%,召回率分别为50%和42%,精度分别为42%和46%,F1分数分别为42%和34%。此外,我们发现基于机器学习的方法在准确的口吃不流畅评估中可能并不有效,这是由于儿童和成人在言语速率和声道上的差异。我们认为,深度学习方法和自动语音识别(ASR)与语言模型的使用可能会改善结果,特别是对于大规模和不平衡的数据集。
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引用次数: 2
Blockchain Token Model for Supply Chain Financing of SMMEs 中小企业供应链融资的区块链代币模型
Pub Date : 2022-04-28 DOI: 10.1142/s0219649222500150
Yanfang Ma, Xuezhen Liu, Xi Deng
Financing difficulties are common among the small-, medium- and micro-enterprises (SMMEs). Although supply chain financing alleviates the problems of SMMEs, such as narrow financing channels, intractable financing and expensive financing, however, due to the centralised storage and management of data, the authenticity of data cannot be guaranteed. The credit of the core enterprises in the supply chain cannot penetrate the SMMEs in upstream and downstream. This paper establishes a blockchain pass-through model for supply chain financing by improving the PBFT consensus algorithm based on blockchain’s decentralised and tamper-evident characteristics and the pass-through of SMMEs’ assets in the supply chain. The model improves the circulation efficiency of the supply chain; moreover, it enables the credit of core enterprises to the upstream and downstream, solving the financing dilemma of SMMEs.
融资困难是中小微企业普遍存在的问题。供应链融资虽然缓解了中小企业融资渠道狭窄、融资难、融资贵等问题,但由于数据的集中存储和管理,无法保证数据的真实性。供应链核心企业的信用无法渗透到上下游的中小企业。本文基于区块链去中心化、易篡改的特点,结合中小企业资产在供应链中的传递,对PBFT共识算法进行改进,建立了供应链融资的区块链传递模型。该模型提高了供应链的流通效率;使核心企业的信贷流向上下游,解决了中小企业的融资困境。
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引用次数: 2
A Blockchain-Based Security Model for IoT Systems 基于区块链的物联网系统安全模型
Pub Date : 2022-04-28 DOI: 10.1142/s0219649222500046
Bing Chen, Ding Liu, Ting Zhang
The current Internet of Things (IoT) technology has entered a relatively mature development stage, and more and more IoT devices can readily access the Internet. However, along with this, the IoT system still faces fragile security of device nodes, easy data tampering, and low system stability. To this end, this paper proposes a smart contract-based security model for IoT systems. The proposal is based on the super ledger Fabric blockchain platform having decentralised, tamper-proof, and programmable features. These features achieve credible authentication of IoT device nodes on the one hand and tamper-proof data storage on the other hand. Further, with these features, we gain a trustworthy environment for enhancing the security of the whole IoT system.
当前的物联网技术已经进入了一个相对成熟的发展阶段,越来越多的物联网设备可以随时接入互联网。但与此同时,物联网系统仍然面临着设备节点安全性脆弱、数据易被篡改、系统稳定性低等问题。为此,本文提出了一种基于智能合约的物联网系统安全模型。该提案基于超级分类账Fabric区块链平台,具有去中心化、防篡改和可编程功能。这些特性一方面实现了物联网设备节点的可信认证,另一方面实现了数据的防篡改存储。此外,通过这些功能,我们获得了一个值得信赖的环境,以增强整个物联网系统的安全性。
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引用次数: 3
CAPIRS: COVID-19-Based Application Programming Interface Recommendation System for the Developers CAPIRS:基于covid -19的开发者应用编程接口推荐系统
Pub Date : 2022-04-28 DOI: 10.1142/s0219649222400044
M. Nawaz, Saif-Ur-Rehman Khan, Bashir Ahmad, Javed Iqbal, Inayat ur-Rehman
Context: From the past few years, Application Programming Interface (API) is widely used for mobile- and web-based application developments. Software developers can integrate third-party services into their projects to achieve their development goals efficiently using APIs; however, with the rapid increase in the number of APIs, the manual selection of Mashup-oriented API is becoming more difficult for the developer. Objective: In the COVID-19 pandemic, everyone wants an update about the latest Standard Operating Procedures (SOPs) and the latest information on COVID-19. Additionally, a software developer wants to develop an application that provides the SOPs and latest information of COVID-19; a developer can add these functionalities into an application using COVID-19-based APIs. Moreover, the current work aims at proposing a COVID-19-based API recommendation system for the developers. Method: In this study, we propose a COVID-19-based API recommendation system for developers. The recommendation system takes a developer query as input and recommends top-3 APIs and supported features, which help the developer during software development. Furthermore, the proposed COVID-19-based API recommendation system ensures the maximum participation of the developers by validating the recommended APIs and recommendation system from the expert developers using research questionnaires. Results: Additionally, the proposed COVID-19-based API recommendation system’s output is validated by expert developers and evaluated on 120 expert developers’ queries. In addition, experiment results show that single value decomposition achieves better prediction. Conclusion: We conclude that it is significantly important to recommend APIs along with supported features to the developer for project development, and future work is needed to take more developer’s queries also to build Integrated Development Environment for the developers.
背景:从过去几年开始,应用程序编程接口(API)被广泛用于移动和基于web的应用程序开发。软件开发人员可以使用api将第三方服务集成到他们的项目中,从而有效地实现他们的开发目标;然而,随着API数量的快速增加,对于开发人员来说,手动选择面向mashup的API变得越来越困难。目的:在COVID-19大流行期间,每个人都希望了解最新的标准操作程序(sop)和最新的COVID-19信息。此外,软件开发人员希望开发一个应用程序,提供标准操作程序和最新的COVID-19信息;开发人员可以使用基于covid -19的api将这些功能添加到应用程序中。此外,目前的工作旨在为开发者提出一个基于covid -19的API推荐系统。方法:在本研究中,我们提出了一个基于covid -19的开发者API推荐系统。推荐系统将开发者查询作为输入,并推荐前3名api和支持的功能,这有助于开发者在软件开发过程中。此外,本文提出的基于covid -19的API推荐系统通过研究问卷验证专家开发人员推荐的API和推荐系统,确保开发人员的最大参与。结果:此外,提出的基于covid -19的API推荐系统的输出经过专家开发人员的验证,并对120个专家开发人员的查询进行了评估。此外,实验结果表明,单值分解的预测效果更好。结论:我们得出的结论是,为项目开发人员推荐api和支持的特性是非常重要的,未来的工作需要更多的开发人员的查询,也需要为开发人员构建集成开发环境。
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引用次数: 0
Application of Quality Function Deployment as an Integrative Method to Knowledge Management Implementation 质量功能部署作为一种集成方法在知识管理实施中的应用
Pub Date : 2022-04-28 DOI: 10.1142/s0219649222500228
L. Reis, J. Fernandes, Sérgio Evangelista Silva, Alana Deusilan Sester Pereira
Knowledge Management Implementation (KMI) can be analysed from three perspectives: Knowledge Management System (KMS) implementation, Knowledge Management Processes (KMPs) implementation and Organisational Outcomes (OO). Quality Function Deployment (QFD), conceived within the scope of quality, represents a method capable of bringing significant contributions to the knowledge field of KMI. The QFD method stands out as a comprehensive approach to improve the quality of products and services, focussing on customer requirements. The literature presents a scarcity of studies that discuss the KMI implementation process, addressing these three perspectives. Furthermore, studies that address QFD in the context of KM are more focussed on the KMS implementation perspective. In this context, this research proposes an innovative approach adopting QFD in order to structure the KMI, encompassing the three perspectives presented (KMS implementation, KMP implementation and OO). In this context, QFD is seen as a method of integrating and operationalising KMI activities. To validate this approach, we applied the case study in an academic support department at a Brazilian public university. As a result, it was possible to verify that the QFD helps in the operationalisation of the KMS and KMP and also improves OO. Still, it was observed that the approach to knowledge management seems to be easy to apply in the academic setting and has produced good results in the service offered in the department where it was applied.
知识管理实施(KMI)可以从三个角度进行分析:知识管理系统(KMS)的实施、知识管理过程(KMPs)的实施和组织成果(OO)。质量功能展开(QFD)是在质量范围内构思的,它代表了一种能够为KMI的知识领域带来重大贡献的方法。QFD方法作为提高产品和服务质量的综合方法,以客户需求为重点。文献提出了一个稀缺的研究,讨论KMI的实施过程,解决这三个观点。此外,在知识管理的背景下解决质量功能展开的研究更侧重于知识管理实施的角度。在此背景下,本研究提出了一种采用QFD来构建KMI的创新方法,包括三个观点(KMS实施,KMP实施和OO)。在这种情况下,QFD被视为一种整合和操作KMI活动的方法。为了验证这种方法,我们在巴西一所公立大学的学术支持部门应用了案例研究。因此,有可能验证QFD有助于KMS和KMP的运作,并改善OO。然而,人们注意到,知识管理的方法似乎很容易应用于学术环境,并在应用该方法的部门提供的服务中产生了良好的结果。
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引用次数: 4
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