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INTELLIGENT SECURITY SYSTEMS ENGINEERING FOR MODELING FIRE CRITICAL INCIDENTS:TOWARDS SUSTAINABLE SECURITY

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Journal of Systems Science and Systems Engineering 2009年第4期18卷 477-488页

作者： Ali ASGARY Ali SADEGHI NAINI jason LEVY Emergency Management York University Faculty of Geography University of Tehran Department of Electrical and Computer Engineering University of Western Ontario Homeland Security and Emergency Preparedness Virginia Commonwealth University

An intelligent security systems engineering approach is used to analyze fire and explosive critical incidents, a growing concern in urban communities. A feed-forward back-propagation neural network models the damages arising from these critical incidents. The overall goal is to promote fire safety and sustainable security. The intelligent security systems engineering prediction model uses a fully connected multilayer neural network, and considers a number of factors related to the fire or explosive incident including the type of property affected, the time of day, and the ignition source. The network was trained on a large number of critical incident records reported in Toronto, Canada between 2000 and 2006. Our intelligent security systems engineering approach can help emergency responders by improving cr^tical incident analysis, sustainable security, and fire risk management.

关键词： Intelligent security systems engineering fire feed-forward neural networks critical incidents

Processing Compressed Expanded Natural Graphite for Phase Change Material Composites

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Journal of Thermal Science 2023年第3期32卷 1213-1226页

作者： Alexander BULK Adewale ODUKOMAIYA Ethan SIMMONS jason WOODS National Renewable Energy Laboratory 15013 Denver West ParkwayGoldenCO 80401USA

Phase change materials(PCMs)are used in various thermal energy storage applications but are limited by their low thermal *** method to increase conductivity involves impregnating organic PCMs into highly porous conductive matrix *** these materials,compressed expanded natural graphite(CENG)matrices have received the most *** this attention,the effect that CENG processing has on PCM saturation and overall matrix thermal conductivity has not been fully ***,the effect of the heat treatment process used to expand intercalated graphite flakes is evaluated *** heat treatment temperatures yielded higher saturation rates and overall saturation at similar matrix *** example,increasing temperature from 300℃to 700℃resulted in approximately 60%-70%increase in pore saturation after 100 minutes of *** exposure time to heat treatment had less of an effect on PCM *** exposure time had negligible effect above 30 min and above 500℃heating ***,because the expanded graphite was found to oxidize around 700℃,the use of longer exposure time in manufacturing applications can be beneficial if a shortened impregnation time is *** treatment conditions did not impact thermal *** composite latent heat of fusion was also reduced approximately proportionally to the PCM mass fraction.A local maximum in axial thermal conductivity was observed at around 83%porosity,which is similar to previous *** observed conductivity at this maximum was a factor of 81 times greater than the conductivity of the PCM.

关键词： phase change materials thermal energy storage compressed expanded natural graphite thermal conductivity enhancement porous material sorptivity composite matrix

Terrestrial Analogue Research to Support Human Performance on Mars:A Review and Bibliographic Analysis

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Space(Science & Technology) 2022年第1期2022卷 307-324页

作者： Andrew Terhorst jason A.Dowling CSIRO Data 61 HobartAustralia CSIRO Australian e-Health Research Centre BrisbaneAustralia

Terrestrial analogues can provide essential scientific information and technology validation to assist future crewed missions to the Martian *** paper analyses the recent literature since 2010 in this area,highlighting key topics,authors,and research *** reviews analogue locations,missions,the scientific impact from research *** findings indicate that permanent analogue sites enable reproducible science and objective comparison between studies.A standard,open registry of analogue facilities,and associated peer-reviewed research may lead to accelerated and better targeted analogue research.

关键词： surface. analogue analogues

Potential of using forest residue to offset coal use in co-fired coal power plants in the eastern United States

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International Journal of Agricultural and Biological Engineering 2014年第4期7卷 99-105页

作者： jason Parent Marcello Graziano Xiusheng Yang Department of Natural Resources and the Environment University of ConnecticutStorrsCT 06269-4087USA Department of Geography University of ConnecticutStorrsCT 06269-1063USA

The global transition from fossil fuel-based energy sources to renewable energy sources will be most effective,for at least the near future,by utilizing local resources and existing *** many areas of the eastern United States,forest residue is abundant and can be used in existing facilities to supplement coal in coal-fired power *** forest residue has potential as a renewable energy source that could be effectively utilized in the near *** study uses GIS to estimate the potential quantity of forest residue available for use in coal-fired power plants in the eastern United *** costs limit the distance over which it is feasible to transport forest residue to the power plants and these costs may fluctuate depending on economic ***,we consider three scenarios in our analysis assuming the maximum feasible transport distances to be 60,80,and 100 *** the eastern U.S.,the total annual forest residue available to coal plants is approximately 29.4,40.2,and 48.2 million dry tons,respectively,for maximum transport distances of 60,80,and 100 *** an 80 km transport distance,forest residue has the potential to reduce coal consumption by 22.3 million tons per *** this scenario,greenhouse gas emissions would be reduced by almost 58.1 million tons per year,and NOx and SOx emissions would be reduced by 69.3 and 122.6 thousand tons *** analysis suggests that by offsetting coal use,forest residue has the potential to substantially reduce power plant emissions.

关键词： forest residue coal biofuel co-firing GIS alternative energy

AN OPTICAL FLOW APPROACH TO ANALYZING SPECIES DENSITY DYNAMICS AND TRANSPORT

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Journal of Computational Mathematics 2012年第3期30卷 249-261页

作者： Aaron Luttman Erik Bollt jason Holloway Department of Mathematics Clarkson UniversityPotsdamNYUSA Department of Electrical Engineering Rice UniversityHoustonTXUSA

Classical optical flow techniques were developed for computing virtual motion fields between two images of the same scene, assuming conservation of intensity and a smooth- ness of the flow field. If these assumptions are dropped, such techniques can be adapted to compute apparent fows between time snapshots of data that do not come from images, even if these flows are turbulent and divergent, as in the case of flows representing complex spatiotemporal dynamics. While imaging methods have been used to analyze dynamics in experimental applications, they are only beginning to be applied to dynamics computa- tions in settings outside the laboratory, for example in the analysis of species population dynamics from satellite data. In this work we present a variational optical flow approach based on the continuity equation and total variation regularization for computing the flow fields between population densities generated from a two-species predator-prey model for phyto- and zooplankton interactions. Given the time-varying vector fields produced from the optical flow~ computational methods from dynamical systems can be employed to study pseudo-barriers present in the species interaction. This method allows to measure the mix- ing of the species, as well as the transport of the populations throughout the domain.

关键词： Optical flow Finite-time Lyapunov exponent Mass transport Data-drivendynamical systems.

Dose-dependent associations of joint aerobic and muscle-strengthening exercise with obesity:A cross-sectional study of 280,605 adults

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Journal of Sport and Health Science 2023年第2期12卷 186-193页

作者： jason A Bennie Ding Ding Katrien De Cocker Physically Active Lifestyles Research Group(USQ-PALs) Centre for Health ResearchUniversity of Southern QueenslandSpringfield CentralQLD 4300Australia Prevention Research Collaboration Sydney School of Public HealthUniversity of SydneySydneyNSW 2006Australia Charles Perkins Centre Epidemiology Unit Charles Perkins CentreUniversity of SydneySydneyNSW 2006Australia

Background:Emerging epidemiological evidence suggests that compared to engaging in 1 activity mode alone,a combination of moderate-tovigorous physical activity(MVPA:brisk walking/jogging,cycling)and muscle-strengthening exercise(MSE:push-ups/sit-ups,using weight machines)has more favorable associations with optimal weight ***,few studies have examined the dose-dependent and joint associations of MVPA and MSE with ***:Based on cross-sectional analyses of the European Health Interview Survey Wave 2(2013-2014),we examined prevalence ratios(PRs)of joint and stratified associations between MVPA(4 categories:(ⅰ)0 min/week,(ⅱ)1-149 min/week,(ⅲ)150-299 min/week,and(ⅳ)≥300 min/week)and MSE(3 categories:(ⅰ)0 day/week,(ⅱ)1 day/week,and(ⅲ)>2 days/week)with body mass index-defined obesity(body mass index of>30.0 kg/m2)using Poisson regression with robust error *** were examined unadjusted and adjusted for sociodemographic and lifestyle characteristics(e.g.,sex,age,education,income,and smoking status).Results:Data were available for 280,456 adults(≥18 years),of which 46,166(15.5%)were *** interaction MVPA x MSE guideline adherence was statistically significant for obesity(p≤0.05).The joint MVPA-MSE analysis showed that compared to the reference group(i.e.,no MVPA and no MSE),the PRs followed a dose-dependent pattern,with the lowest observed among those reporting≥150 MVPA min/week and≥1 MSE days/week(PR:0.43;95%confidence interval:0.41-0.46).When stratified across each MVPA strata,the PRs were mostly lower among those engaging in MSE 1 day/week,as compared to those doing MSE≥2 days/***:"There was evidence for a dose-dependent association between joint MVPA-MSE with a reduced prevalence of *** health strategies for the prevention and management of obesity should recommend both MVPA and MSE.

关键词： Body mass index Epidemiology Public health Resistance exercise

Design of synthetic materials for intracellular delivery of RNAs： From siRNA-mediated gene silencing to CRISPR/Cas gene editing

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Nano Research 2018年第10期11卷 5310-5337页

作者： jason B. Miller Daniel J. Siegwart Simmons Comprehensive Cancer Center University of Texas Southwestern Medical Center Dallas TX 75390 USA Department of Biochemistry University of Texas Southwestern Medical Center Dallas TX 75390 USA

Ribonucleic acids （RNAs） possess great therapeutic potential and can be used to treat a variety of diseases. The unique biophysical properties of RNAs, such as high molecular weight, negative charge, hydrophilicity, low stability, and potential immunogenicity, require chemical modification and development of carriers to enable intracellular delivery of RNAs for clinical use. A variety of nanornaterials have been developed for the effective in vivo delivery of short/ small RNAs, messenger RNAs, and RNAs required for gene editing technologies including clustered regularly interspaced palindromic repeat （CRISPR）/Cas. This review outlines the challenges of delivering RNA therapeutics, explores the chemical synthesis of RNA modifications and carriers, and describes the efforts to design nanomaterials that can be used for a variety of clinical indications.

关键词： nucleic acid therapeutics nanoparticles synthetic nanomaterials RNA interference (RNAi) messenger RNA (mRNA) clustered regularly inter-spaced palindromic repeat(CRISPR)/Cas

Data-augmentation for graph neural network learning of the relaxed energies of unrelaxed structures

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npj Computational Materials 2022年第1期8卷 2037-2043页

作者： jason Gibson Ajinkya Hire Richard G.Hennig Department of Materials Science and Engineering University of FloridaGainesvilleFL32611USA Quantum Theory Project University of FloridaGainesvilleFL32611USA

Computational materials discovery has grown in utility over the past decade due to advances in computing power and crystal structure prediction algorithms(CSPA).However,the computational cost of the ab initio calculations required by CSPA limits its utility to small unit cells,reducing the compositional and structural space the algorithms can *** studies have bypassed unneeded ab initio calculations by utilizing machine learning to predict the stability of a ***,graph neural networks trained on large datasets of relaxed structures display high fidelity in predicting formation ***,the geometries of structures produced by CSPA deviate from the relaxed state,which leads to poor predictions,hindering the model’s ability to filter unstable *** remedy this behavior,we propose a simple,physically motivated,computationally efficient perturbation technique that augments training data,improving predictions on unrelaxed structures by 66%.Finally,we show how this error reduction can accelerate CSPA.

关键词： material relaxed utilizing

RNA methylation regulates hematopoietic stem and progenitor cell development

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Journal of Genetics and Genomics 2017年第10期44卷 473-474页

作者： jason Ear Shuo Lin Department of Molecular Cell and Developmental Biology University of California Los Angeles 90095 CA USA

Methylation of adenosine base on the nitrogen-6 position （N6-methyladenosine, m^6A） is the most common and abundant modification on mRNA transcripts. This post-transcriptional modification was first described in the... 详细信息

关键词： RNA methylation regulates hematopoietic stem and progenitor cell development