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  1. Book ; Online: Operator Guidance Informed by AI-Augmented Simulations

    Edwards, Samuel J. / Levine, Michael

    2023  

    Abstract: This paper will present a multi-fidelity, data-adaptive approach with a Long Short-Term Memory (LSTM) neural network to estimate ship response statistics in bimodal, bidirectional seas. The study will employ a fast low-fidelity, volume-based tool ... ...

    Abstract This paper will present a multi-fidelity, data-adaptive approach with a Long Short-Term Memory (LSTM) neural network to estimate ship response statistics in bimodal, bidirectional seas. The study will employ a fast low-fidelity, volume-based tool SimpleCode and a higher-fidelity tool known as the Large Amplitude Motion Program (LAMP). SimpleCode and LAMP data were generated by common bi-modal, bi-directional sea conditions in the North Atlantic as training data. After training an LSTM network with LAMP ship motion response data, a sample route was traversed and randomly sampled historical weather was input into SimpleCode and the LSTM network, and compared against the higher fidelity results.

    Comment: Presented at the 22nd Conference on Computer Applications and Information Technology in the Maritime Industries (COMPIT) in Drubeck, Germany on May 25th, 2023
    Keywords Computer Science - Artificial Intelligence ; Computer Science - Machine Learning ; Physics - Atmospheric and Oceanic Physics ; Statistics - Applications ; 68T07 ; J.2
    Publishing date 2023-07-17
    Publishing country us
    Document type Book ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  2. Article ; Online: Insights into the solution structure of the hydrated uranyl ion from neutron scattering and EXAFS experiments.

    Edwards, Samuel J / Bowron, Daniel T / Baker, Robert J

    Dalton transactions (Cambridge, England : 2003)

    2022  Volume 51, Issue 36, Page(s) 13631–13635

    Abstract: The solution structure of 1.0 M Uranyl Chloride has been determined by the EPSR modelling of a combination of neutron scattering and EXAFS data. The experimental data show an equilibrium in solution between [ ... ...

    Abstract The solution structure of 1.0 M Uranyl Chloride has been determined by the EPSR modelling of a combination of neutron scattering and EXAFS data. The experimental data show an equilibrium in solution between [UO
    Language English
    Publishing date 2022-09-20
    Publishing country England
    Document type Journal Article
    ZDB-ID 1472887-4
    ISSN 1477-9234 ; 1364-5447 ; 0300-9246 ; 1477-9226
    ISSN (online) 1477-9234 ; 1364-5447
    ISSN 0300-9246 ; 1477-9226
    DOI 10.1039/d2dt02535c
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Americium incorporation into studtite: a theoretical and experimental study.

    Biswas, Saptarshi / Edwards, Samuel J / Wang, Zheming / Si, Hang / Vintró, Luis León / Twamley, Brendan / Kowalski, Piotr M / Baker, Robert J

    Dalton transactions (Cambridge, England : 2003)

    2019  Volume 48, Issue 34, Page(s) 13057–13063

    Abstract: Studtite, [ ... ...

    Abstract Studtite, [UO
    Language English
    Publishing date 2019-08-13
    Publishing country England
    Document type Journal Article
    ZDB-ID 1472887-4
    ISSN 1477-9234 ; 1364-5447 ; 0300-9246 ; 1477-9226
    ISSN (online) 1477-9234 ; 1364-5447
    ISSN 0300-9246 ; 1477-9226
    DOI 10.1039/c9dt02848j
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article: A compact comprehensive two-dimensional gas chromatography (GC×GC) approach for the analysis of biogenic VOCs

    Edwards, Samuel J / Lewis, Alastair C / Andrews, Stephen J / Lidster, Richard T / Hamilton, Jacqueline F / Rhodes, Christopher N

    Analytical methods. 2012 Dec. 6, v. 5, no. 1

    2012  

    Abstract: We describe the development of a compact comprehensive two-dimensional gas chromatograph suitable for the measurement of biogenic VOCs in the atmosphere at part per billion mixing ratios. The design seeks to minimise instrument size and power consumption ...

    Abstract We describe the development of a compact comprehensive two-dimensional gas chromatograph suitable for the measurement of biogenic VOCs in the atmosphere at part per billion mixing ratios. The design seeks to minimise instrument size and power consumption and maximise portability and autonomy. The instrument concept is to achieve high analyte selectivity for complex VOC mixture analysis using comprehensive two-dimensional GC (GC×GC), rather than hyphenation with larger more expensive detectors such as MS. Key features of the analytical approach are a custom-built miniature thermal desorption trap to collect and concentrate VOCs from the sample gas stream, a copper conducting direct column heating system and a valve-modulated interface to enable GC×GC. The high power and large form-factor turbulent GC oven is replaced by direct column heating (and cooling below ambient) by thermal transfer from copper bobbin holders with heating and cooling input from Peltier devices. The combination of two independent copper bobbins allows for independent control of the two columns needed for comprehensive GC. A heated two position 1/16′′ diaphragm valve is used to enable flow modulation between two columns, with analyte detection at the outlet of the second column using a miniaturised low cost photo-ionisation detector. The instrument sub-components are controlled by a Compact RIO computer (National Instruments) and purpose designed software written in LabVIEW allowing autonomous measurements. The complete system weighs 15 kg, is around the size of a desktop computer and has a mean power demand of 112 W when battery powered. Results on the sensitivity and linearity for isoprene collection and analysis of standard gas mixtures are presented along with a discussion of limiting factors that hinder field device performance.
    Keywords batteries ; comprehensive two-dimensional gas chromatography ; computer software ; computers ; cooling ; copper ; desorption ; detectors ; energy use and consumption ; gas chromatography ; heat ; heating systems ; isoprene ; mixing ratio ; ovens ; valves (equipment) ; volatile organic compounds
    Language English
    Dates of publication 2012-1206
    Size p. 141-150.
    Publishing place The Royal Society of Chemistry
    Document type Article
    ZDB-ID 2515210-5
    ISSN 1759-9679 ; 1759-9660
    ISSN (online) 1759-9679
    ISSN 1759-9660
    DOI 10.1039/c2ay25710f
    Database NAL-Catalogue (AGRICOLA)

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  5. Article: Detection of monobromamine, monochloramine and dichloramine using selected ion flow tube mass spectrometry and their relevance as breath markers.

    Senthilmohan, Senti T / Kettle, Anthony J / McEwan, Murray J / Dummer, Jack / Edwards, Samuel J / Wilson, Paul F / Epton, Michael J

    Rapid communications in mass spectrometry : RCM

    2008  Volume 22, Issue 5, Page(s) 677–681

    Abstract: We report a fast, sensitive, real-time method to measure monobromamine, monochloramine and dichloramine using selected ion flow tube mass spectrometry (SIFT-MS). Relative rate coefficients and product distributions are reported for the reagent ions H3O+ ... ...

    Abstract We report a fast, sensitive, real-time method to measure monobromamine, monochloramine and dichloramine using selected ion flow tube mass spectrometry (SIFT-MS). Relative rate coefficients and product distributions are reported for the reagent ions H3O+ and O2 +. Rapid reactions with the haloamines were observed with H3O+ and O2 + but no fast reaction was found with NO+. A slow reaction between NO+ and dichloramine was observed. We demonstrate the feasibility of determining these compounds in a single human breath for which the limit of detection is approaching 10 parts per billion (ppb). We also report preliminary measurements of these compounds in the breath of individuals where the concentrations of bromamine and chloramine ranged from 10 to 150 ppb.
    MeSH term(s) Biomarkers/analysis ; Breath Tests/instrumentation ; Breath Tests/methods ; Bromides/analysis ; Chloramines/analysis ; Exhalation ; Feasibility Studies ; Humans ; Mass Spectrometry/instrumentation ; Mass Spectrometry/methods
    Chemical Substances Biomarkers ; Bromides ; Chloramines ; bromamine (14519-10-9) ; chloramine (KW8K411A1P)
    Language English
    Publishing date 2008
    Publishing country England
    Document type Journal Article
    ZDB-ID 58731-x
    ISSN 1097-0231 ; 0951-4198
    ISSN (online) 1097-0231
    ISSN 0951-4198
    DOI 10.1002/rcm.3418
    Database MEDical Literature Analysis and Retrieval System OnLINE

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