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Exploring Parsimonious Principles that Unify Active Portfolio Selection (I): Model
No full textInvestor portfolio-selection behaviours remain inadequately integrated into a unified framework. We demonstrate that only two principles are necessary to span a comprehensive framework and unify diverse active portfolio-selection behaviours: (1) Subjective Allocation Rule (SAR)-based allocation and (2) Minimum Tracking Error (MTE)-guided mimicking. These principles leverage efficiency, value-adding, and cognition-friendly mechanisms to transform broader, more natural investor insights - whether quantitative or qualitative - into optimal portfolios aligned with their true intensions. Our empirical evidence reveals that incorporating investor subjectivity can enhance performance, outperforming traditional frameworks such as Markowitz’s. This paper, the first of two, focuses on the structural formulation
A robust algorithm for authenticated health data access via blockchain and cloud computing
Get PDFIn modern healthcare, providers increasingly use cloud services to store and share electronic medical records. However, traditional cloud hosting, which depends on intermediaries, poses risks to privacy and security, including inadequate control over access, data auditing, and tracking data origins. Additionally, current schemes face significant limitations such as scalability concerns, high computational overhead, practical implementation challenges, and issues with interoperability and data standardization. Unauthorized data access by cloud providers further exacerbates these concerns. Blockchain technology, known for its secure and decentralized nature, offers a solution by enabling secure data auditing in sharing systems. This research integrates blockchain into healthcare for efficient record management. We proposed a blockchain-based method for secure EHR management and integrated Ciphertext-Policy Attribute-Based Encryption (CP-ABE) for fine-grained access control. The proposed algorithm combines blockchain and smart contracts with a cloud-based healthcare Service Management System (SMS) to ensure secure and accessible EHRs. Smart contracts automate key management, encryption, and decryption processes, enhancing data security and integrity. The blockchain ledger authenticates data transactions, while the cloud provides scalability. The SMS manages access requests, enhancing resource allocation and response times. A dual authentication system confirms patient keys before granting data access, with failed attempts leading to access revocation and incident logging. Our analyses show that this algorithm significantly improves the security and efficiency of health data exchanges. By combining blockchain’s decentralized structure with the cloud’s scalability, this approach significantly improves EHR security protocols in modern healthcare setting
Supporting girls’ confidence in party politics in the context of the rise of misogyny: Introducing the G-EPIC project
Get PDFProsocial reputation and stress among contemporary hunter-gatherers:the Hadza case
Get PDFIt has been suggested that having a reputation for being prosocial is a critical part of social status across all human societies. It has also been argued that prosocial behavior confers benefits, whether physiological, such as stress reduction, or social, such as building allies or becoming more popular. Here, we investigate the relationship between helping reputation (being named as someone others would go to for help), and hair-derived chronic stress (hair cortisol concentration). In a sample of 77 women and 62 men, we found that perceived helping reputation was not related to chronic stress. Overall, the results of our study suggest that, in an egalitarian society with fluid camp membership and widely practiced generosity such as the Hadza, helping reputation does not necessarily boost stress-related health benefits through prestige-signaling mechanisms observed in hierarchical, large-scale societies. [Abstract copyright: © 2024. The Author(s).
"Of no consequence?":Rachel Fane's Manuscripts and Archival Erasure
Get PDFThis article explores the significance of Rachel Fane/Bourchier’s archive as a source of information about seventeenth-century domestic performance. This archive remains underexplored, due to Nathaniel Wraxall’s interventions in the Sackville archives, which contributed to the neglect of Rachel’s archive in the nineteenth and twentieth centuries. Wraxall’s interventions serve as a departure point to explore archival absence and loss more broadly: reviewing archival trends in the latter half of the twentieth century, the article thinks through different kinds of absences in archival collections. While archival loss is inevitable, it affects those already marginalized within the archives unduly, in ways that early modern scholars must attend to carefully. Ultimately, this paper concludes by considering the ways that Rachel herself contributed to archival erasure within her own records, calling attention to the ongoing duty of care historians owe to subjects who have been written out of dominant historical narratives.© 2024, Johns Hopkins University Press. This is an author produced version of a paper published in Shakespeare Bulletin uploaded in accordance with the publisher’s self- archiving policy. The final published version (version of record) is available online at the link. Some minor differences between this version and the final published version may remain. We suggest you refer to the final published version should you wish to cite from it
Using non-invasive brain stimulation to alleviate emotion dysregulation and aid smoking cessation: a concurrent tdcs-fmri study
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