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Heating, ventilating, and air conditioning analysis and design Faye C. McQuiston, jerald.d. parker, Jeffrey d. Spitler. 5th ed.

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Heating, ventilating, and air conditioning analysis and desi...

First principles insights into oxide/polymer composites: SrTiO_(3) /polyaniline/graphene

2000年

作者： Faye C. McQuiston jerald.d. parker Jeffrey d. Spitler.

来源：畅想之星图书光盘版（南... 评论

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Journal of Materials Science & Technology 2023年第35期166卷 250-260页

作者： Nathan d.Wood Joshua S.Tse Jonathan M.Skelton david J.Cooke Lisa J.Gillie Stephen C.parker Marco Molinari department of Chemical Sciences School of Applied SciencesUniversity of HuddersfieldHuddersfield HD13DHUK department of Chemistry University of ManchesterManchester M139PLUK department of Chemistry University of BathBath BA27AYUK

A detailed computational investigation,based on density functional theory,of the interaction of polyani-line(PANI)and graphene nanoribbons(GNRs)with SrTiO_(3) is *** adsorption of PANI in var-ious oxidation states and co-adsorption with GNRs is found to be thermodynamically ***-sorbed PANI introduces N and C 2p states into the SrTiO_(3) bandgap,while co-adsorption of PANI and GNRs leads to a bridging of the gap and semi-metallic behaviour,thus rendering the electrical properties highly sensitive to the loading of the GNRs/PANI in the *** the lattice dynamics of the composites predicts a 68-88%reduction in the lattice thermal conductivity due to reduced phonon group *** together,these findings provide insight into the growing number of experimental studies highlighting the enhanced thermoelectric performance of oxide-polymer composites and indicate co-adsorption with graphene as a facile direction for future research.

关键词： Polymer/inorganic composites Polyaniline/strontium titanate/graphene nanoribbon composites PANI/GNR/SrTiO_(3)composites Thermoelectric composites Electrical transport Thermal conductivity1 Introduction

Modular next generation fast-neutron detector for portal monitoring

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Nuclear Science and Techniques 2022年第1期33卷 140-148页

作者： E.Aboud S.Ahn G.V.Rogachev V.E.Johnson J.Bishop G.Christian E.Koshchiy C.E.parker d.P.Scriven Cyclotron Institute Texas A&M UniversityCollege StationTX 77843USA department of Physics and Astronomy Texas A&M UniversityCollege StationTX 77843USA department of Statistics Texas A&M UniversityCollege StationTX 77843USA

Nuclear nonproliferation is of critical importance for global *** fissile materials including highly enriched uranium and weapons-grade plutonium are especially important to *** interrogation techniques may result in much better sensitivity but are difficult with conventional portal monitors that rely on detecting thermal ***,most conventional portal monitoring systems rely on ^(3)He,which has a finite and continually decreasing *** designing a highly segmented array of organic scintillators,we posit that we can accurately and quickly identify fissile materials,including weapons-grade plutonium and highly enriched uranium,being *** propose a new design for a fast-neutron detector that overcomes the limitations of the current generation of portal ***6 simulations have been performed in conjunction with the UMPBT statistical model to determine the sensitivity limitations of the proposed *** suggest that the proposed detector may be 10 times more efficient than current-generation thermal neutron detectors and may be able to positively identify a 81 mg 235U source in as little as 192 seconds utilizing active interrogation techniques.

关键词： Fast-neutron detection Portal monitoring Nonproliferation

There is no real evidence for a diminishing trend of the Atlantic meridional overturning circulation

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Journal of Ocean Engineering and Science 2016年第1期1卷 30-35页

作者： A.parker C.d.Ollier School of Engineering and Physical Science James Cook UniversityTownsvilleQLDAustralia School of Earth and Environment University of Western AustraliaCrawley WAAustralia

The Atlantic Meridional Overturning Circulation(AMOC)is part of the great ocean“conveyor belt”that circulates heat around the *** the early 2000s,ocean sensors have started to monitor the AMOC,but the measurements are still far from accurate and the time window does not permit the separation of short term variability from a longer term *** works have claimed that global warming is slowing down the AMOC,based on models and proxies of *** other observations demonstrate a stable circulation of the *** using tide gauge data complementing recent satellite and ocean sensor observations,the stability of the AMOC is shown to go back to *** is concluded that no available information has the due accuracy and time coverage to show a clear trend outside the inter-annual and multi-decadal variability in the direction of increasing or decreasing strength over the last decades.

关键词： Ocean circulation Conveyor belt Global warming Climate change.

A Review of the Tetrapod Track Record in China,with Special Reference to Type Ichnospecies:Implications for Ichnotaxonomy and Paleobiology

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Acta Geologica Sinica(English Edition) 2013年第1期87卷 1-20页

作者： Martin G.LOCKLEY LI Jianjun LI Rihui Masaki MATSUKAWA jerald.d.HARRIS XING Lida University of Colorado denver Dinosaur Tracks Research Group Beijing Museum of Natural History Museum Qingdao Institute of Marine Geology China Geological Survey department of Environmental Sciences Tokyo Gakugei University department of Physical Sciences Dixie State College department of Biological Sciences University of Alberta11455 Saskatchewan Drive

＂Splitting＂ and ＂lumping＂ are perpetual problems in vertebrate, especially dinosaur, ichnotaxonomy. Chinese dinosaur ichnotaxonomy, which began in 1940, provides a series of interesting case studies, highlighting the dual problems of historical and dubious ichnotaxonomy. Chinese Mesozoic tetrapod track types have been placed into 63 ichnospecies （one Triassic, 28 Jurassic, and 34 Cretaceous）, exclusive of other, non-type ichnospecies or ichnotaxa identified from China. Fifty-two （~83%） of these 63 tetrapod ichnospecies were placed in monospecific ichnogenera. At the ichnogenus level, we prune---either by recognizing nomina dubia or by synonymy--17 from the list of 53 dinosaurian ichnogenera （a 32% reduction）, leaving 36 ichnotaxa that we consider valid. Most of the cuts affect Jurassic theropod ichnotaxa, which are reduced from 23 to only nine because most ichnogenera are subjective junior synonyms of Grallator and Eubrontes. Fewer Chinese Cretaceous ichnotaxa （only six of 21 ichnogenera） are obvious nomina dubia or subjective synonyms, suggesting greater east Asian endemism during this time. Because ichnospecies differences are subtle, we provisionally retain ichnospecies as valid pending detailed comparative analyses of congeneric ichnospecies. This synthesis is long overdue and is necessary to address problems of historical and provincial ichnotaxonomy, which severely hamper comparisons of tetrapod ichnofaunas in space and time.

关键词： dinosaurs birds theropods ichnotaxonomy Mesozoic China

Exchange-Correlation Functional Comparison of Electronic Energies in Atoms Using a Grid Basis

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Journal of Applied Mathematics and Physics 2022年第11期10卷 3392-3407页

作者： Anthony d. Ryan Andres Gama Frank Felerski William d. parker department of Mathematics and Physics University of Wisconsin-Parkside Kenosha WI USA

Calculation of total energies of the electronic ground states of atoms forms the basis for the frozen-core pseudopotentials used in atomistic calculations of much larger scale. Reference values for these energies provide a benchmark for the validation of new software to calculate such potentials. In addition, basic atomic-scale electronic properties such as the (first) ionization energy provide a simple check on the approximation used in the calculation method. We present a comparison of the total energies and ionization energies of atoms Z = 1 - 92 calculated in density functional theory with several levels of exchange-correlation functional and the Hartree-Fock method, comparing ionization energies to experiment. We also investigate the role of relativistic treatment on these energies.

关键词： density Functional Theory Hartree-Fock Theory Electronic Energies Exchange-Correlation Potential Exchange and Correlation Functional Ionization Energy

Health and safety perspectives of graphene in wearables and hybrid materials

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Journal of Materials Science & Technology 2023年第24期155卷 10-32页

作者： Premika Govindaraj Azadeh Mirabedini Xing Jin dennis Antiohos Nisa Salim Phil Aitchison Jake parker Franz Konstantin Fuss Nishar Hameed Faculty of Science Engineering and Technology Swinburne University of Technology Hawthorn Melbourne VIC 3122 Australia Aerospace Engineering and Aviation School of Engineering RMIT University Bundoora Melbourne VIC 3083 Australia Institute for Frontier Materials Deakin University Geelong VIC 3216 Australia Imagine Intelligent Materials Sydney NSW 2018 Australia Sparc Technologies Kent Town South Australia 5067 Australia Chair of Biomechanics Faculty of Engineering Science University of Bayreuth Bayreuth D-95440 Germany

The growing demand for smart wearables, coupled with the omnipresence of graphene due to its array of outstanding thermal, electrical, and mechanical properties, have driven the industry-led initiatives to develop lightweight, smart, and robust graphene-based wearable technologies. The substantial research and the increase in technology readiness levels (TRLs) of graphene-based technologies have led to the adoption of graphene in many industries. Graphene-based wearables are one such technology that involves closer interaction of graphene by the end-user. despite this, understanding the toxicological risks associated with using graphene-based wearables is still in the fundamental stage. Herein, graphene-based wearables and industrial-scale fabrication techniques for the development of graphene-based wearables are reviewed. The main goal of the review is to initially evaluate the likelihood of user exposure to graphene from the wearable device and the potential health effects. The subsequent health risks based on graphene's physicochemical characteristics are also discussed. A framework to elucidate the risk is presented in terms of crucial exposure routes, possible graphene interactions, recent exposure assessments, detection removal techniques from the human body, and risk management protocols. It is hoped that this review may aid towards establishing a reasonable practice concerning the safe integration of graphene materials into wearables and facilitate their commercialization.

关键词： Graphene Wearables Composites Nanomaterials Smart materials Health and safety

3d extrusion of multi-biomaterial lattices using an environmentally informed workflow

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Frontiers of Architectural Research 2022年第4期11卷 691-708页

作者： Vasiliki Panagiotidou Andreas Koerner Marcos Cruz Brenda parker Bastian Beyer Sofoklis Giannakopoulos Bio-Integrated design Lab The Bartlett School of ArchitectureUniversity College LondonLondonWC1E 6BTUnited Kingdom

The conventional building material palette has been proven limited in terms of adaptability to our current environmental challenges. Innovations in computational design and digital manufacturing have supported the broadening of biomaterial applications as an alternative. While biomaterials are characteristically responsive to stimuli such as temperature and humidity, their unpredictable behaviour is a hurdle to standardization and architectural utilisation. To examine the nexus between material formulation, computation and manufacturing, multi-biomaterial lattice structures were produced through an environmentally informed workflow. Customized biomaterial development resulted in three candidate biopolymer blends with varying levels of hydro-responsiveness and transparency. The computational strategy included a machine learning clustering algorithm to customise results and dictate material distribution outputs. To test the workflow, environmental data of solar radiation exposure and solar heat gain from a specific location was used to inform the material deposition via pneumatic extrusion for the design and digital fabrication of a deformation-controlled prototype of 350 mm × 350 mm. This led to a series of multi-biomaterial wall panel components that can be applied at architectural scale. In future, these techniques can support the incorporation of living elements to be embedded within the built environment for truly animate architecture.

关键词： Hydrogels Multi-biomaterials Hygroscopic properties Pneumatic extrusion Environmentally informed deposition Integrated workflows

Atmospheric and kinetic studies of OH and HO_2 by the FAGE technique

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Journal of Environmental Sciences 2012年第1期24卷 78-86页

作者： d.Amedro K.Miyazaki A.parker C.Schoemaecker C.Fittschen Laboratoire PC2A Universit de Lille 1- Ba timent C1159655 Villeneuve d'AscqFrance department of Applied Chemistry Tokyo Metropolitan UniversityJapan

A new FAGE setup has recently been built at the University of Lille,*** permits the quantification of OH and HO 2 in the atmosphere with a detection limit of 3×10 5 molecules/（cm 3 ·min） for OH and 1×10 6 molecules/（cm 3 ·min） for HO *** coupling to a photolysis cell enables the measurement of the total reactivity of the hydroxyl radical in ambient air and kinetic studies in *** configurations have been considered：one with the photolysis cell at 90° to the FAGE nozzle,the other on line with the FAGE *** two configurations have been tested and validated by measuring the well known rate constants of OH with CH 4,C 3 H 8 and *** advantages and drawbacks of each configuration have been *** ＂on line＂ configuration limits losses and permits measurements over a larger reactivity range but is affected by OH formation from the laser beam striking the FAGE nozzle,thus limiting the ability to carry out energy dependence studies which can,in contrast,be successfully performed in the 90° configuration.

关键词： OH kinetic reactivity laser induced fluorescence