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Mass data processing of time series Landsat imagery:pixels to data products for forest monitoring

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International Journal of Digital Earth 2016年第11期9卷 1035-1054页

作者： Txomin Hermosilla michael A.Wulder Joanne C.white Nicholas C.Coops Geordie W.Hobart Lorraine B.Campbella Integrated Remote Sensing Studio Department of Forest Resources ManagementUniversity of British ColumbiaVancouverBCCanada Canadian Forest Service(Pacific Forestry Centre) Natural Resources CanadaVictoriaBCCanada

Free and open access to the Landsat archive has enabled the implementation of national and global terrestrial monitoring ***,we summarize a project characterizing the change history of Canada’s forested ecosystems with a time series of data representing *** the Composite2Change approach,we applied spectral trend analysis to annual best-available-pixel(BAP)surface reflectance image composites produced from Landsat TM and ETM+imagery.A total of 73,544 images were used to produce 29 annual image composites,generating∼400 TB of interim data products and resulting in∼25 TB of annual gap-free reflectance composites and change *** average,10%of pixels in the annual BAP composites were missing data,with 86%of pixels having data gaps in two consecutive years or *** detection overall accuracy was 89%.Change attribution overall accuracy was 92%,with higher accuracy for standreplacing wildfire and *** were assigned to the correct year with an accuracy of 89%.Outcomes of this project provide baseline information and nationally consistent data source to quantify and characterize changes in forested *** methods applied and lessons learned build confidence in the products generated and empower others to develop or refine similar satellite-based monitoring projects.

关键词： Remote sensing big data forest change monitoring image processing

Control design of an unmanned hovercraft for agricultural applications

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International Journal of Agricultural and Biological Engineering 2015年第2期8卷 72-79页

作者： Deyka I Garcia Warren N white Department of Mechanical Engineering Universidad Tecnológica de PanamáPanamá0819-07289Panamá Department of Mechanical and Nuclear Engineering Kansas State UniversityManhattanKS 66506USA

The efficient and precise application of agricultural materials such as fertilizer or herbicide can be greatly facilitated by autonomous *** is especially important under difficult conditions at remote *** purpose of this work is to develop an accurate nonlinear controller using a direct Lyapunov approach to ensure stability of an unmanned hovercraft prototype used for the execution of these agricultural *** a craft constitutes an underactuated system which has fewer actuators than degrees of *** proposed closed loop system is simulated to demonstrate that a control law can stabilize both the actuated and unactuated degrees of freedom of the *** is shown that the position and orientation of the hovercraft achieve high dynamic and steady performance.

关键词： controller direct Lyapunov method nonholonomic constraint underactuated system unmanned hovercraft

Management of diverticular disease is changing

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World Journal of Gastroenterology 2006年第20期12卷 3225-3228页

作者： Martin H Floch Jonathan A white Digestive Disease Section Yale University School of Medicine 333 Cedar Street1080 LMPPO Box 208019New HavenCT 06520United States Section of Gastroenterology Norwalk Hospital 24 Stevens StreetNorwalkCT 06856United States

Diverticular disease of the colon is primarily a disease of humans living in westernized and industrialized countries. Sixty percent of humans living in industrialized countries will develop colonic diverticula. It is rare before the age of 40, but more prone to complications when it occurs in the young. By age 80, over 65% of humans have colonic diverticula. The cause remains uncertain, but epidemiologic studies attribute it to dietary fiber deficiency. The cause of diverticulitis remains uncertain, but new observations and hypotheses suggest that it is due to chronic inflammation in the bowel wall. Standard medical therapies of bowel rest and antibiotics are still the recommended treatment. However, changing concepts and new therapies indicate that anti-inflammatory agents such as mesalamine and possibly probiotics may be helpful in shortening the course and perhaps preventing recurrences. Standard surgical treatment for perforation for severe acute disease has developed so that two-stage procedures are recommended. In addition, laparoscopic surgery has proven safe and may slowly become the technique of choice.

关键词： Diverticulitis Mesalamine Treatments

Patient-specific monocyte-derived microglia as a screening tool for neurodegenerative diseases

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Neural Regeneration Research 2023年第5期18卷 955-958页

作者： Hazel Quek Anthony R.white Mental Health and Neuroscience QIMR Berghofer Medical Research Institute School of Biomedical Science The University of QueenslandBrisbaneQLDAustralia

Microglia, the main driver of neuroinflammation, play a central role in the initiation and exacerbation of various neurodegenerative diseases and are now considered a promising therapeutic target. Previous studies on in vitro human microglia and in vivo rodent models lacked scalability, consistency, or physiological relevance, which deterred successful therapeutic outcomes for the past decade. Here we review human blood monocyte-derived microglia-like cells as a robust and consistent approach to generate a patient-specific microglia-like model that can be used in extensive cohort studies for drug testing. We will highlight the strength and applicability of human blood monocyte-derived microglia-like cells to increase translational outcomes by reviewing the advantages of human blood monocyte-derived microglia-like cells in addressing patient heterogeneity and stratification, the basis of personalized medicine.

关键词： human in vitro microglia models neurodegeneration neuroinflammation patient heterogeneity patient stratification peripheral blood monocyte-derived microglia-like cells therapeutic target transdifferentiation translational outcomes

Heightened condition dependent expression of structural coloration in the faces,but not wings,of male and female flies

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Current Zoology 2022年第5期68卷 600-607页

作者： Thomas E white Amy Locke Tanya Latty School of Life and Environmental Sciences The University of SydneySydney 2106Australia

Structurally colored sexual signals are a conspicuous and widespread class of ornament used in mate choice,though the extent to which they encode information on the quality of their bearers is not fully *** predicts that signaling traits under strong sexual selection as honest indicators should evolve to be more developmentally integrated and exaggerated than nonsexual traits,thereby leading to heightened condition ***,we test this prediction through examination of the sexually dimorphic faces and wings of the cursorial fly Lispe *** and females possess structural UV-white and golden faces,respectively,and males present their faces and wings to females during close-range,ground-based courtship displays,thereby creating the opportunity for mutual *** a field-collected sample of individuals,we found that the appearance of the faces of both sexes scaled positively with individual condition,though along separate *** in better condition expressed brighter faces as modeled according to conspecific flies,whereas condition scaled with facial saturation in *** found no such relationships for their wing interference pattern nor abdomens,with the latter included as a nonsexual *** results suggest that the structurally colored faces,but not the iridescent wings,of male and female *** are reliable guides to individual quality and support the broader potential for structural colors as honest *** also highlight the potential for mutual mate choice in this system,while arguing for 1 of several alternate signaling roles for wing interferences patterns among the myriad taxa which bear them.

关键词： honest signal iridescent mate choice sexual selection wing interference pattern

POLYMERIC SURFACTANT STRUCTURE

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Chinese Journal of Polymer Science 2001年第2期19卷 135-145页

作者： P.M.Saville J.W.white Research School of Chemistry The Australian National University Canberra ACT 0200 AustraliaResearch School of Chemistry The Australian National University Canberra ACT 0200 Australia

Polymeric surfactants are amongst the most widespread of all polymers. In nature, proteins and polysaccharidescause self organization as a result of this surfactancy; in industry, polymeric surfactants play key roles in the food, explosivesand surface coatings sectors. The generation of useful nano- and micro-structures in films and emulsions as a result ofpolymer amphiphilicity and the application of mechanical stress is discussed. The use of X-ray and neutron small anglescattering and reflectivity to measure these structures and their dynamic properties will be described. New results on linear and dendritic polymer surfactants are presented.

关键词： Polymeric Surfactant Structure X-ray Neutron Reflectivity Film

Nano-Structured Carbide-Derived Carbon Films and Their Tribology

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Tsinghua Science and Technology 2005年第6期10卷 699-703页

作者： michael McNallan Daniel Ersoy Ranyi Zhu Allen Lee Christopher white Sascha Welz Yury Gogotsi Ali Erdemir Andriy Kovalchenko CME Department M/C 246 University of illinois at Chicago 842 W. Taylor St. Chicago IL 60607 USA Department of Materials Science and Engineering and A. J. Drexel Nanotechnology Institute Drexel University Philadelphia PA 19104 USA Energy Technology Division Argonne National Laboratory Argonne IL 60439 USA

Carbide-derived carbon （CDC） is a form of carbon produced by reacting metal carbides, such as SiC or TiC, with halogens at temperatures high enough to produce fast kinetics, but too low to permit the rearrangement of the carbon atoms into an equilibrium graphitic structure. The structure of CDC is derivative of the original carbide structure and contains nanoscale porosity and both sp2 and sp3 bonded carbon in a variety of nanoscale structures. CDC can be produced as a thin film on hard carbides to improve their tribological performance. CDC coatings are distinguished by their low friction coefficients and high wear resistance in many important industrial environments and by their resistance to spallation and delamination. The tribology of CDC coatings on SiC surfaces is described in detail.

关键词： carbon coatings tribology friction chlorination

Ferroptosis drives immune-mediated neurodegeneration in multiple sclerosis

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Cellular & Molecular Immunology 2023年第1期20卷 112-113页

作者： Anthony R.white Mental Health and Neuroscience QIMR Berghofer Medical Research InstituteHerstonQld4006Australia

One of the leading issues in multiple sclerosis(MS)research is the lack of understanding regarding the triggers of *** demyelination is a major feature in MS,the degeneration of gray matter neurons contributes to major changes in patient function,but the mechanisms driving this neuronal loss are *** exciting research published by Luoqian et al.[1]in the December issue of Cellular and Molecular Immunology,new insights have shown an important contribution of ferroptosis to T-cell-mediated neurodegeneration in the common animal model of MS,‘experimental autoimmune encephalomyelitis’(EAE).Although a relationship between ferroptosis and T-cell activation has been reported in other disorders,this is the first discovery of a link between abnormal iron homeostasis and T-cell infiltration in *** addition,the authors found that unlike other studies on ferroptosis-T-cell interactions[2,3],ferroptotic activation of T cells in EAE,and potentially MS,involved the infiltration and activation of CD4+T cells,rather than CD8+***,in this study,ferroptosis was a key driver of T-cell activation rather than the opposite interaction where CD8+cells drive ferroptosis[3].The research also mapped a key role for Acsl4 in the early stages of ferroptosis-T-cell-mediated ***4 converts free long-chain fatty acids into fatty acyl-CoA esters and has been identified as a central contributor to ferroptotic processes[4].This study has mapped a major new pathway potentially leading to neurodegeneration in MS,and this opens the possibility of new therapeutic approaches to treat MS based on iron targeting as the authors describe in their final experiments.

关键词： neurodegeneration degeneration homeostasis

Resilient Fault Diagnosis Under Imperfect Observations–A Need for Industry 4.0 Era

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IEEE/CAA Journal of Automatica Sinica 2020年第5期7卷 1279-1288页

作者： Alejandro white Ali Karimoddini Mohammad Karimadini IEEE Vehicle Technology Directorate CCDC Army Research LaboratoryAberdeen Proving GroundMD 21005 USA Department of Electrical and Computer Engineering North Carolina Agricultural and Technical State UniversityGreensboroNC 27411 USA Department of Electrical Engineering Arak University of TechnologyArak ***Iran

In smart industrial systems,in many cases,a fault can be captured as an event to represent the distinct nature of subsequent ***-based fault diagnosis techniques are capable model-based methods for diagnosing faults from a sequence of observable events executed by the system under *** event-based diagnosis techniques rely on perfect observations of observable ***,in practice,it is common to miss an observable event due to a problem in sensorreadings or communication/transmission *** paper develops a fault diagnosis tool,referred to as diagnoser,which can robustly detect,locate,and isolate occurred *** developed diagnoser is resilient against missed observations.A missed observation is detected from its successive sequence of *** detecting a missed observation,the developed diagnoser automatically resets and then,asynchronously resumes the diagnosis *** is achieved solely based on postreset/activation observations and without interrupting the performance of the system under *** concepts of asynchronous detectability and asynchronous diagnosability are *** is shown that if asynchronous detectability and asynchronous diagnosability hold,the proposed diagnoser is capable of diagnosing occurred faults under imperfect *** proposed technique is applied to diagnose faults in a manufacturing *** examples are provided to explain the details of the proposed *** result paves the way towards fostering resilient cyber-physical systems in Industry4.0 context.

关键词： Cyber-physical systems discrete event systems fault diagnosis imperfect communication imperfect observation Industry 4.0 resilience