178 research outputs found

    Multilayers of Fluorinated Amphiphilic Polyions for Marine Fouling Prevention

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    Sequential layer-by-layer (LbL) deposition of polyelectrolytes followed by chemical cross-linking was investigated as a method to fabricate functional amphiphilic surfaces for marine biofouling prevention applications. A novel polyanion, grafted with amphiphilic perfluoroalkyl polyethylene glycol (fPEG) side chains, was synthesized and subsequently used to introduce amphiphilic character to the LbL film. The structure of the polyanion was confirmed by FTIR and NMR. Amphiphilicity of the film assembly was demonstrated by both water and hexadecane static contact angles. XPS studies of the cross-linked and annealed amphiphilic LbL films revealed the increased concentration of fPEG content at the film interface. In antifouling assays, the amphiphilic LbL films effectively prevented the adhesion of the marine bacterium Pseudomonas (NCIMB 2021)

    Mechanisms underlying the autonomic modulation of ventricular fibrillation initiation—tentative prophylactic properties of vagus nerve stimulation on malignant arrhythmias in heart failure

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    An Assessment of Forecasting Methods for a Specialty Chemical Company

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    This thesis is being archived as a Digitized Shelf Copy for campus access to current students and staff only. We currently cannot provide this open access without the author's permission. If you are the author of this work and desire to provide it open access or wish access removed please contact the Wahlstrom Library to discuss permission.This thesis evaluated forecasting procedures that could improve sales forecasting outputs for a specialty chemical company. Quantitative forecasting methods were used to investigate the correlation between sales and certain economic indicators. Sales forecasts were prepared using time-series and causal forecasting methods. Sales volumes could be forecasted with a 95% confidence level by using two different methods. Additional research is recommended to managers who want to find other business barometers traceable to their sales outlook

    Establishing Cyber Warfare Doctrine

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    Over the past several decades, advances in technology have transformed communications and the ability to acquire, disseminate, and utilize information in a range of environments. Modern societies and their respective militaries have taken advantage of a robust information space through network-centric systems. Because military and commercial operations have increasingly converged, communication and information infrastructures are now high-priority military objectives in times of war. This article examines the theoretical underpinning of current cyber warfare research, what we have learned so far about its application, and some of the emerging themes to be considered; it also postulates the development of a (national) cyber warfare doctrine (CWD). An endeavor of this scale requires lots of considerations and preparation for its development if it is to be cooperatively embraced. This article considers why information technology systems and their supporting infrastructures should be considered legitimate military targets in conflicts, and offers several events that support this supposition. In addition, it identifies the various forms of doctrine that will become the basis for developing a CWD, discusses a CWD's possible components, and proposes a national collaborative and discussion framework for obtaining a nation's stakeholder buy-in for such a

    DNA-DNA Hybridization Studies and Marsupial Phylogeny

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    DNA-DNA hybridisations using \u27unique\u27 DNA sequences have been done on 11 marsupial species representing seven of the major families. The phylogenetic reconstruction of the branching sequence of the species studied is largely consistent with previous taxonomic predictions. This technique will be important in resolving some of the currently outstanding problems of marsupial taxonomy
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