309 research outputs found
Randomized algorithms for precise measurement of differentially-private, personalized recommendations
Personalized recommendations form an important part of today's internet
ecosystem, helping artists and creators to reach interested users, and helping
users to discover new and engaging content. However, many users today are
skeptical of platforms that personalize recommendations, in part due to
historically careless treatment of personal data and data privacy. Now,
businesses that rely on personalized recommendations are entering a new
paradigm, where many of their systems must be overhauled to be privacy-first.
In this article, we propose an algorithm for personalized recommendations that
facilitates both precise and differentially-private measurement. We consider
advertising as an example application, and conduct offline experiments to
quantify how the proposed privacy-preserving algorithm affects key metrics
related to user experience, advertiser value, and platform revenue compared to
the extremes of both (private) non-personalized and non-private, personalized
implementations.Comment: Submitted to AAA
All-optical spatio-temporal metrology for isolated attosecond pulses
Characterizing an isolated attosecond pulse (IAP) is essential for its
potential applications. A complete characterization of an IAP ultimately
requires the determination of its electric field in both time and space
domains. However, previous methods, like the widely-used RABBITT and attosecond
streaking, only measure the temporal profile of the attosecond pulse. Here we
demonstrate an all-optical method for the measurement of the space-time
properties of an IAP. By introducing a non-collinear perturbing pulse to the
driving field, the process of IAP generation is modified both spatially and
temporally, manifesting as a spatial and a frequency modulation in the harmonic
spectrum. By using a FROG-like retrieval method, the spatio-spectral phases of
the harmonic spectrum are faithfully extracted from the induced spatio-spectral
modulations, which allows a thoroughgoing characterization of the IAP in both
time and space. With this method, the spatio-temporal structures of the IAP
generated in a two-color driving field in both the near- and far-field are
fully reconstructed, from which a weak spatio-temporal coupling in the IAP
generation is revealed. Our approach overcomes the limitation in the temporal
measurement in conventional in situ scheme, providing a reliable and holistic
metrology for IAP characterization.Comment: 18 pages, 5 figure
Dynamic capabilities for CSR management: towards identifying common processes
Purpose
â The objective of this paper is to address the question whether and how firms can follow a standard management process to cope with emerging corporate social responsibility (CSR) challenges? Both researchers and practitioners have paid increasing attention to the question because of the rapidly evolving CSR expectations of stakeholders and the limited diffusion of CSR standardization. The question was addressed by developing a theoretical framework to explain how dynamic capabilities can contribute to effective CSR management.
Design/methodology/approach
â Based on 64 world-leading companiesâ contemporary CSR reports, we carried out a large-scale content analysis to identify and examine the common organizational processes involved in CSR management and the dynamic capabilities underpinning those management processes.
Findings
â Drawing on the dynamic capabilities perspective, we demonstrate how the deployment of three dynamic capabilities for CSR management, namely, scanning, sensing and reconfiguration capabilities can help firms to meet emerging CSR requirements by following a set of common management processes. The findings demonstrate that what is more important in CSR standardization is the identification and development of the underlying dynamic capabilities and the related organizational processes and routines, rather than the detailed operational activities.
Originality/value
â Our study is an early attempt to examine the fundamental organizational capabilities and processes involved in CSR management from the dynamic capabilities perspective. Our research findings contribute to CSR standardization literature by providing a new theoretical perspective to better understand the capabilities enabling common CSR management processes
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