This paper uses the stability of the delay differential equation to study its impact on online advertising, helps analyze Hopf branch characteristics in a big data environment, helps companies make online advertising decisions, and maximizes the benefits of product sales. The thesis fully considers various factors such as advertising volume, advertising schedule, and advertising investment level, discusses the singularity types of the advertising delay differential equation, and gives the best decision for advertising investment.The stability of the time-lag differential equation studied in this paper is to study its impact on online advertising, to help analyze the Hopf branch characteristics in the big data environment, and to help companies make online advertising decisions. structure of this article is also from the amount of advertising, the time of advertising, Advertising investment level gradually expands with a certain degree of continuity.
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http://dx.doi.org/10.3934/mbe.2021242 | DOI Listing |
J Nephrol
January 2025
School of Life and Medical Sciences, University of Hertfordshire, College Lane Campus, Hatfield, UK.
Background: Depression and anxiety are commonly experienced by people with chronic kidney disease (CKD). This study aimed to evaluate person- and service-level factors associated with depression and anxiety symptoms. We sought to also understand utilisation of mental health treatments and preferences for future psychological support.
View Article and Find Full Text PDFAlzheimers Dement (N Y)
January 2025
Alzheimer Center Amsterdam Neurology Vrije Universiteit Amsterdam, Amsterdam UMC VUmc Amsterdam The Netherlands.
Introduction: Recruitment of participants for intervention studies is challenging. We evaluated the effectiveness and efficiency of a participant recruitment campaign through an online registry for the FINGER-NL study, a multi-domain lifestyle intervention trial targeting cognitively healthy individuals aged 60-79 with dementia prevention potential. Additionally, we explored which recruitment strategy successfully reached individuals from underrepresented groups in research.
View Article and Find Full Text PDFBMC Public Health
January 2025
Institute for Social Marketing and Health, University of Stirling, Stirling, Scotland.
Background: To explore continuities and changes in gambling behaviour during the COVID-19 pandemic and the factors that influenced these among a sample of regular sports bettors.
Methods: A longitudinal qualitative study using in-depth interviews. Sixteen sports bettors living in Britain took part in the first interviews in July-November 2020, and 13 in the follow-up interviews in March-September 2021.
ACS Nano
January 2025
Department of Physics, Chalmers University of Technology, SE-412 96 Gothenburg, Sweden.
UV-vis spectroscopy is a workhorse in analytical chemistry that finds application in life science, organic synthesis, and energy technologies like photocatalysis. In its traditional implementation with cuvettes, it requires sample volumes in the milliliter range. Here, we show how nanofluidic scattering spectroscopy (NSS), which measures visible light scattered from a single nanochannel in a spectrally resolved way, can reduce this sample volume to the attoliter range for solute concentrations in the mM regime, which corresponds to as few as 10 probed molecules.
View Article and Find Full Text PDFTob Control
January 2025
Rutgers Institute for Nicotine & Tobacco Studies, New Brunswick, New Jersey, USA.
Objectives: In the USA, some tobacco companies replaced the marketing phrase '100% natural additive-free tobacco' with 'tobacco ingredients: tobacco & water' (T&W) after receiving warnings from the US Food and Drug Administration. This study assesses how people interpret the now-restricted additive-free claims and newer T&W claims on Natural American Spirit (NAS) and L&M cigarette packs.
Methods: An online between-subjects experiment randomised 2526 US adults to view one of three packs: an NAS additive-free pack, an NAS T&W pack or an L&M T&W pack.
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