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On the Role of Electrodes in Introducing Airflow Distortion in Residential Oil Burners

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Engineering（科研） 2019年第5期11卷 260-271页

作者： Mebougna L. Drabo Narinder K. Tutu thomas butcher Rebecca Trojanowski Stephen U. Egarievwe Department of Mechanical & Civil Engineering and Construction Management Alabama A & M University Normal AL USA Sustainable Energy Technology Department Brookhaven National Laboratory Upton NY USA Department of Electrical Engineering and Computer Science Alabama A&M University Normal AL USA

Computational Fluid Dynamics (CFD) simulations of airflow through a retention head residential oil burner were carried out to study the velocity field near and around the fuel spray. The simulations revealed (as expected, based on some previous experimental measurements) the velocity flow field to be far from axisymmetric. Moreover, the center of the swirling airflow was found to be at some radial distance away from the physical centerline of the flame tube. Since it was suspected that the two electrodes just upstream of the retention ring of the burner might be responsible for this flow distortion, additional CFD simulations were then carried out for the cases of no electrodes and 4-electrodes. The results clearly show that all flow distortions (velocity deviations from axisymmetric value) vanish when no electrodes are present and that the flow distortions are reduced by a factor of 2 when two additional dummy electrodes (for a total of 4 electrodes) are included in the burner design. Furthermore, for the 4-electrode case, the eccentricity of the swirling airflow is reduced by almost a factor of 3 as compared to the base design case of 2-electrodes.

关键词： Flow Distortion Residential Oil Burner Retention Head Flame Tube Swirl Airflow

Kilowatt-class high-energy frequency conversion to 95 J at 10 Hz at 515 nm

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High Power Laser Science and Engineering 2023年第5期11卷 153-156页

作者： Martin Divoky Jonathan Phillips Jan Pilar Martin Hanus Petr Navratil Ondrej Denk Tomas Paliesek Patricie Severova Danielle Clarke Martin Smrz thomas butcher Chris Edwards John Collier Tomas Mocek HiLASE Centre Institute of Physics of the Czech Academy of SciencesDolni BrezanyCzech Republic Central Laser Facility STFC Rutherford Appleton LaboratoryDidcotUK

We report on frequency doubling of high-energy,high repetition rate ns pulses from a cryogenically gas cooled multi-slab ytterbium-doped yttrium aluminum garnet laser system,Bivoj/DiPOLE,using a type-I phase matched lithium triborate *** achieved conversion to 515 nm with energy of 95 J at repetition rate of 10 Hz and conversion efficiency of 79%.High conversion efficiency was achieved due to successful depolarization compensation of the fundamental input beam.

关键词： diode pumped solid state laser frequency conversion high energy high average power

Pushing the boundaries of diode-pumped solid-state lasers for high-energy applications

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High Power Laser Science and Engineering 2020年第2期8卷 77-79页

作者： Saumyabrata Banerjee Paul Mason Jonathan Phillips Jodie Smith thomas butcher Jacob Spear Mariastefania De Vido Gary Quinn Danielle Clarke Klaus Ertel Cristina Hernez-Gomez Chris Edwards John Collier Central Laser Facility STFC Rutherford Appleton LaboratoryDidcot OX110QXUK Heriot-Watt University School of Engineering and Physical SciencesEH144ASUK

We report on the successful demonstration of a 150 J nanosecond pulsed cryogenic gas cooled,diode-pumped multi-slab Yb:YAG laser operating at 1 *** the best of our knowledge,this is the highest energy ever recorded fo... 详细信息

关键词： cryogenic gas cooling diode-pumped solid-state laser multi-slab amplifier Yb:YAG

Development of a 100 J,10 Hz laser for compression experiments at the High Energy Density instrument at the European XFEL

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High Power Laser Science and Engineering 2018年第4期6卷 133-142页

作者： Paul Mason Saumyabrata Banerjee Jodie Smith thomas butcher Jonathan Phillips Hauke Hoppner Dominik Moller Klaus Ertel Mariastefania De Vido Ian Hollingham ANDrew Norton Stephanie Tomlinson Tinesimba Zata Jorge Suarez Merchan Chris Hooker Mike Tyldesley Toma Toncian Cristina HernANDez-Gomez Chris Edwards John Collier Central Laser Facility STFC Rutherford Appleton LaboratoryDidcotOX11 0QXUK Institute for Radiation Physics Helmholtz-Zentrum Dresden-Rossendorf e.V.D-01328 DresdenGermany

In this paper we review the design and development of a 100 J, 10 Hz nanosecond pulsed laser, codenamed DiPOLE100 X,being built at the Central Laser Facility(CLF). This 1 kW average power diode-pumped solid-state laser(DPSSL) is based on a master oscillator power amplifier(MOPA) design, which includes two cryogenic gas cooled amplifier stages based on DiPOLE multi-slab ceramic Yb:YAG amplifier technology developed at the CLF. The laser will produce pulses between 2 and 15 ns in duration with precise, arbitrarily selectable shapes, at pulse repetition rates up to 10 Hz, allowing real-time shape optimization for compression experiments. Once completed, the laser will be delivered to the European X-ray Free Electron Laser(XFEL) facility in Germany as a UK-funded contribution in kind, where it will be used to study extreme states of matter at the High Energy Density(HED) instrument.

关键词： cryogenic lasers diode-pumped solid-state laser high energy lasers laser amplifiers Yb:YAG

Tuning beneficial calcineurin phosphatase activation to counterα-synuclein toxicity in a yeast model of Parkinson’s disease

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Neural Regeneration Research 2025年第1期20卷 199-200页

作者： Srishti Chawla Mikael Molin thomas Nystrom Institute for Biomedicine Sahlgrenska AcademyCentre for Ageing and Health-AgeCapUniversity of GothenburgGothenburgSweden Department of Life Sciences Chalmers University of TechnologyGothenburgSweden

Calcineurin(CN)is a calcium-and calmodulindependent serine/threonine that has been studied in many model organisms including yeast,filamentous fungi,plants,and *** biological functions range from ion homeostasis and virulence in lower eukaryotes to T-cell activation in humans by human nuclear factors of activated *** is a heterodimeric protein consisting of a catalytic subunit,calcineurin A(Cna1p),which contains an active site with a dinuclear metal center,and a regulatory Ca^(2+) binding subunit called calcineurin B(Cnb1p)required to activate *** calcineurin B subunit has been highly conserved through evolution:For example,the mammalian calcineurin B shows 54%identity with calcineurin B from Saccharomyces cerevisiae.

关键词： activation dinuclear conserved

Microglia:a promising therapeutic target in spinal cord injury

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Neural Regeneration Research 2025年第2期20卷 454-463页

作者： Xiaowei Zha Guoli Zheng thomas Skutella Karl Kiening Andreas Unterberg Alexander Younsi Department of Neurosurgery Heidelberg University HospitalHeidelbergGermany Department of Neuroanatomy Institute for Anatomy and Cell BiologyHeidelberg UniversityHeidelbergGermany

Microglia are present throughout the central nervous system and are vital in neural repair,nutrition,phagocytosis,immunological regulation,and maintaining neuronal *** a healthy spinal cord,microglia are accountable for immune surveillance,however,when a spinal cord injury occurs,the microenvironment drastically changes,leading to glial scars and failed axonal *** this context,microglia vary their gene and protein expression during activation,and proliferation in reaction to the injury,influencing injury responses both favorably and unfavorably.A dynamic and multifaceted injury response is mediated by microglia,which interact directly with neurons,astrocytes,oligodendrocytes,and neural stem/progenitor *** a clear understanding of their essential nature and origin,the mechanisms of action and new functions of microglia in spinal cord injury require extensive *** review summarizes current studies on microglial genesis,physiological function,and pathological state,highlights their crucial roles in spinal cord injury,and proposes microglia as a therapeutic target.

关键词： astrocytes cytokines functional recovery immune regulation M1/M2 activation macrophages microglia neuroinflammation spinal cord injury therapy

Petawatt and exawatt class lasers worldwide

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High Power Laser Science and Engineering 2019年第3期7卷 168-221页

作者： Colin N.Danson Constantin Haefner Jake Bromage thomas butcher Jean-Christophe FChanteloup Enam A.Chowdhury Almantas Galvanauskas Leonida A.Gizzi Joachim Hein David I.Hillier Nicholas W.Hopps Yoshiaki Kato Efim A.Khazanov Ryosuke Kodama Georg Korn Ruxin Li Yutong Li Jens Limpert Jingui Ma Chang Hee Nam David Neely Dimitrios Papadopoulos Rory R.Penman Liejia Qian Jorge J.Rocca andrey A.Shaykin Craig W.Siders Christopher Spindloe Sándor Szatmári Raoul M.G.M.Trines Jianqiang Zhu Ping Zhu Jonathan D.Zuegel AWE AldermastonReadingUK OxCHEDS Clarendon LaboratoryDepartment of PhysicsUniversity of OxfordOxfordUK CIFS Blackett LaboratoryImperial CollegeLondonUK NIF&Photon Science Directorate Lawrence Livermore National LaboratoryLivermoreUSA Fraunhofer Institute for Laser Technology(ILT) AachenGermany Chair for Laser Technology LLT RWTH Aachen UniversityAachenGermany University of Rochester Laboratory for Laser EnergeticsRochesterUSA Central Laser Facility STFC Rutherford Appleton LaboratoryChiltonDidcotUK LULI CNRSCEASorbonne UniversitesEcole PolytechniqueInstitut Polytechnique de ParisPalaiseauFrance Department of Physics The Ohio State UniversityColumbusUSA Centre for Ultrafast Optical Science University of MichiganAnn ArborUSA Intense Laser Irradiation Laboratory Istituto Nazionale di Ottica(INO)CNRPisaItaly Institute of Optics and Quantum Electronics Friedrich-Schiller-University Jena and Helmholtz InstituteJenaGermany The Graduate School for the Creation of New Photonics Industries NishikuHamamatsuJapan Institute of Applied Physics Russian Academy of SciencesNizhny NovgorodRussia Institute of Laser Engineering Osaka UniversitySuitaOsakaJapan ELI-Beamlines Institute of PhysicsCzech Academy of SciencesPragueCzech Republic State Key Laboratory of High Field Laser Physics Shanghai Institute of Optics and Fine MechanicsChinese Academy of SciencesShanghai 201800China National Laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of SciencesBeijing 100190China Institute for Applied Physics(IAP)at Friedrich-Schiller-University Jena JenaGermany Helmholtz Institute Jena JenaGermany Fraunhofer Institute for Applied Optics and Precision Engineering(IOF) JenaGermany Key Laboratory for Laser Plasma(Ministry of Education) School of Physics and AstronomyShanghai Jiao Tong UniversityShanghai 200240China Centre for Relativistic Laser Science(CoReLS) Institute for Basic ScienceDepartment of Physics and Photon ScienceGwangju Institute of Science and Techno

In the 2015 review paper‘Petawatt Class Lasers Worldwide’a comprehensive overview of the current status of highpower facilities of>200 TW was *** was largely based on facility specifications,with some description of their uses,for instance in fundamental ultra-high-intensity interactions,secondary source generation,and inertial confinement fusion(ICF).With the 2018 Nobel Prize in Physics being awarded to Professors Donna Strickland and Gerard Mourou for the development of the technique of chirped pulse amplification(CPA),which made these lasers possible,we celebrate by providing a comprehensive update of the current status of ultra-high-power lasers and demonstrate how the technology has *** are now in the era of multi-petawatt facilities coming online,with 100 PW lasers being proposed and even under *** addition to this there is a pull towards development of industrial and multi-disciplinary applications,which demands much higher repetition rates,delivering high-average powers with higher efficiencies and the use of alternative wavelengths:mid-IR *** apart from a comprehensive update of the current global status,we want to look at what technologies are to be deployed to get to these new regimes,and some of the critical issues facing their development.

关键词： exawatt lasers high-power lasers petawatt lasers ultra-high intensity

Sleep as a window to understand and regulate Alzheimer's disease:emerging roles of thalamic reticular nucleus

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Neural Regeneration Research 2025年第6期20卷 1711-1712页

作者： Haoqi Sun Shiqian Shen Robert J.thomas M.Brandon Westover Can Zhang Department of Neurology Beth Israel Deaconess Medical CenterHarvard Medical SchoolBostonMAUSA Center for Translational Pain Research Department of AnesthesiaCritical Care and Pain MedicineMassachusetis General HospitalHarvard Medical SchoolBostonMAUSA Division of Pulmonary Critical Care and Sleep MedicineDepartment of MedicineBeth Israel Deaconess Medical CenterHarvard Medical SchoolBostonMAUSA Genetics and Aging Research Unit McCance Center for Brain HealthMass General Institute for Neurodegenerative DiseaseDepartment of NeurologyMassachusetts General HospitalHarvard Medical SchoolBostonMAUSA

Introduction:Alzheimer 's disease(AD) is a common neurodegenerative disorder and the primary cause of dementia. Considerable evidence supports the “amyloid hypothesis,” stating that the pathogenesis of AD is primarily caused by the deposition of amyloid-β(Aβ), which drives tau phosphorylation, neuroinflammation, and neurodegeneration in the brain. The amyloid hypothesis is strengthened by the significant and moderate benefit of lecanemab, a humanized antibody through an anti-amyloid mechanism,showing slowed clinical decline(van Dyck et al.,2023). The recent positive results of anti-amyloid trials have brought back focus on the amyloid hypothesis through biochemical, genetic, and pharmacological approaches(Zhang, 2023).

关键词： Alzheimer inflammation hypothesis

Development of German-Ukrainian cooperations for education and research in photogrammetry and laser scanning

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Geo-Spatial Information Science 2021年第1期24卷 152-159,I0016页

作者： thomas Luhmann Institute for Applied Sciences and Geoinformatics Jade University of Applied Sciences OldenburgOldenburgGermany

Since 2011 an intensive international cooperation has been in place between the Institute for Applied Photogrammetry and Geoinformatics(IAPG)at the Jade University of Applied Sciences in Oldenburg,Germany,and various Ukrainian *** an initial contact by *** Konecny,the first visit was organized,and was followed by many *** subsequent years an intensive cooperation was established particularly with the National University for Construction and Architecture(KNUCA)in *** addition to architects and civil engineers,KNUCA also trains geodesists,geo-information scientists and landscape *** cooperation today includes the reciprocal exchange of scientists and students,research projects,courses and cooperation at many other *** addition,a commercial company has been established,SPM3D LLC,which now employs more than 14 engineers in the field of 3D acquisition,point cloud processing and *** article summarizes the history of the cooperation and presents the results of associated student *** addition,results of joint work on the development of a virtual laser scanner are presented,part of a German-Ukrainian initiative to digitize teaching.

关键词： Internationalization technology transfer curricula reform photogrammetry laser scanning e-learning