An Internet hosting center hosts services on its server ensemble. The center must allocate servers dynamically amongst services to maximize revenue earned from hosting fees. The finite server ensemble, unpredictable request arrival behavior and server reallocation cost make server allocation optimization difficult. Server allocation closely resembles honeybee forager allocation amongst flower patches to optimize nectar influx. The resemblance inspires a honeybee biomimetic algorithm. This paper describes details of the honeybee self-organizing model in terms of information flow and feedback, analyzes the homology between the two problems and derives the resulting biomimetic algorithm for hosting centers. The algorithm is assessed for effectiveness and adaptiveness by comparative testing against benchmark and conventional algorithms. Computational results indicate that the new algorithm is highly adaptive to widely varying external environments and quite competitive against benchmark assessment algorithms. Other swarm intelligence applications are briefly surveyed, and some general speculations are offered regarding their various degrees of success.
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http://dx.doi.org/10.1088/1748-3182/2/4/S07 | DOI Listing |
Behav Res Methods
January 2025
Department of Psychology, University of Bath, Claverton Down, Bath, BA2 7AY, UK.
Measuring attention and engagement is essential for understanding a wide range of psychological phenomena. Advances in technology have made it possible to measure real-time attention to naturalistic stimuli, providing ecologically valid insight into temporal dynamics. We developed a research protocol called Trace, which records anonymous facial landmarks, expressions, and patterns of movement associated with engagement in screen-based media.
View Article and Find Full Text PDFWater Res X
January 2025
University of Michigan Civil and Environmental Engineering, 2350 Hayward St, Ann Arbor, 48104, Michigan, USA.
Real-time control of urban drainage systems (UDS) can reduce flood risk while enhancing water quality. However, internet-connected valves and weirs may become a liability during communications outages. Given that severe storms often cause both flooding and communications failures, it is critical that smart systems cope well with communications outages during these events.
View Article and Find Full Text PDFMolecules
November 2024
Faculty of Chemistry, Adam Mickiewicz University, Uniwersytetu Poznańskiego 8, 61-614 Poznań, Poland.
Metal-containing compounds form a large and rapidly expanding group of high-energy materials. Many compounds in this class attract the attention of non-professionals, who may attempt the illegal production of explosives. Several of these substances have been commercially available and pose significant danger if used by terrorists or for criminal purposes.
View Article and Find Full Text PDFExp Appl Acarol
December 2024
Faculty of Agriculture and Marine Science, Kochi University, 200 Monobeotsu, Nankoku, Kochi, 783-8502, Japan.
Spider mites (Acari: Tetranychidae) overwinter as eggs or adult females, but some do so as multiple life stages on evergreen hosts. However, proximate factors influencing such overwintering stages remain poorly understood. This study investigated photoperiodic responses and life-stage compositions during winter in a population of Schizotetranychus shii, a specialist of Japanese chinquapin (Fagaceae).
View Article and Find Full Text PDFJ Med Internet Res
December 2024
Division of Geriatrics and Gerontology, Department of Medicine, School of Medicine and Public Health, University of Wisconsin - Madison, Madison, WI, United States.
Background: Individuals identifying as Black, American Indian or Alaska Native, or Hispanic or Latino lack access to culturally appropriate accurate information and are the target of disinformation campaigns, which create doubt in science and health care providers and might play a role in sustaining health disparities related to the COVID-19 pandemic.
Objective: This study aims to create and disseminate culturally and medically appropriate social media messages for Black, Latino, and American Indian or Alaska Native communities in Wisconsin and evaluate their reach and effectiveness in addressing the information needs of these communities.
Methods: Our team identified relevant COVID-19 topics based on feedback from their respective community, developed lay format materials, and translated materials into culturally appropriate social media messages that community advocates delivered across their respective communities.
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