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Seasonal size-segregated PM10 and PAH concentrations in a rural area of sugarcane agriculture versus a coastal urban area in Southeastern Florida, USA

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Particuology 2016年第5期14卷 52-59页

作者： Orhan Sevimoglu wolfgang F. Rogge Department of Civil and Environmental Engineering Florida International University 10555 W. Flagier Street Miami FL 33174 USA School of Engineering and Sierra Nevada Research Institute University of California at Merced 5200 North Lake Road Merced CA 95343 USA

Airborne particulate matter （PM） is of health and environmental concern not only in highly urbanized areas, but also in rural areas that are used for intensive agricultural purposes, In this study, PM size- segregated samples were collected simultaneously for 12 months in a small town （Belle Glade, Florida）, which is the center of a vast sugarcane growing area and at Delray Beach, a coastal city in Palm Beach County, Florida. During the winter sampling period, when sugarcane foliage is burned just before harvest- ing to reduce the amount of plant matter to be handled, PM10 levels were 50% or higher than otherwise measured, indicating that sugarcane harvesting and processing is a major local source for PM10. For the rest of the year, PM10 levels at both sites are similar, suggesting that ambient PM levels at both sites are impacted by the major urban centers in Southern Florida. During late July and early August, the PM10 levels at both sites were substantially elevated and revealed the typical red-brownish color of Saharan dust. This has been reported to occur frequently with suitable meteorological conditions over the Atlantic Ocean coupled with a Sahara dust storm event. During the sugarcane harvesting season at Belle Glade, the concentrations of PAHs associated with PM10 were up to 15 times higher than those measured during the summer growing season, indicating a substantially higher exposure of the rural population to these often mutagenic and carcinogenic compounds.

关键词： Size segregated ambient particles PM10 PAHs Biomass burning Rural versus urban Saharan dust

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Control of Strain Hardening Behavior in High-Mn Austenitic Steels

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Acta Metallurgica Sinica(English Letters) 2014年第3期27卷 546-556页

作者： Wenwen Song Tobias Ingendahl wolfgang Bleck Steel Institute RWTH Aachen University Intzestr.1 52072 AachenGermany

Austenitic high-Mn steels with Mn contents between approximately 15 and 30 wt% gain much interest because of their excellent mechanical properties and the option for adjusting strain hardening behavior due to different deformation mechanisms. 2D and 3D composition-dependent stacking fault energy （SFE） maps indicate the effect of chemical composition and temperature on SFE and consequently on the deformation mechanisms. Three steels with different chemical compositions and the same or different SFE are characterized in quasi-static tensile tests. The control parameters of strain hardening behavior in the high-Mn austenitic steels are described, and consequences for future developments are discussed.

关键词： High-Mn austenitic steels Stacking fault energy Strain hardening

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Synthesis of iron（ll） complexes with asymmetric N2O2 coordinating Schiff base-like ligands and their spin crossover properties

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Frontiers of Chemical Science and Engineering 2018年第3期12卷 400-408页

作者： wolfgang Bauer Tanja Ossiander Birgit Weber Department of Chemistry University of Bayreuth 95440 Bayreuth Germany

The synthesis of new Schiff base-like ligands with asymmetric substituents pattern and their iron complexes with pyridine as axial ligand is described. Two of the ligands and one of the iron（II） complexes were characterized by single crystal X-ray structure analysis. One of the the iron（II） complexes shows spin crossover behavior while the others remain in the high spin state. The influence of the reduced symmetry of the ligand on the properties of the complexes is discussed.

关键词： iron Schiffbase-like ligands magnetism spin crossover X-ray structures

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The orbital g-factor and related sum rules

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Science China(Physics,Mechanics & Astronomy) 2011年第2期54卷 194-197页

作者： BENTZ wolfgang ARIMA Akito Department of Physics School of ScienceTokai University Musashi University

The renormalization of the orbital g-factor in nuclei is discussed on the basis of gauge *** relation of the orbital g-factor to the integrated E1 photoabsorption cross section is reviewed,and its relation to the M1 s... 详细信息

关键词： nuclear magnetic moments g-factors giant resonances sum rules

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Polarised radio emission associated with HESS J1912+101

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Research in Astronomy and Astrophysics 2019年第3期19卷 123-130页

作者： wolfgang Reich Xiao-Hui Sun Max-Planck-Institut für Radioastronomie Department of Astronomy Yunnan Universityand Key Laboratory of Astroparticle Physics of Yunnan Province

The shell-type TeV source HESS J1912+101 was tentatively identified as an old supernova remnant, but is missing counterparts at radio and other frequencies. We analysed the Sino-German Urumqiλ6 cm survey and the Effelsberg λ11 cm and λ21 cm surveys to identify radio emission from HESS J1912+101 to clarify the question of a supernova origin. We find a partial shell of excessive polarisation at λ6 cm at the periphery of HESS J1912+101. At λ11 cm, its polarised emission is faint and suffers from depolarisation, while at λ21 cm, no related polarisation is seen. We could not separate the shell's total intensity signal from the confusing intense diffuse emission from the inner Galactic plane. However, a high percentage of polarisation in the shell's synchrotron emission is indicated. Our results support earlier suggestions that HESS J1912+101 is an old supernova remnant. The synchrotron emission is highly polarised,which is typical for evolved supernova remnants with low surface brightness.

关键词： radio continuum ISM-ISM individual objects HESS J1912+101-ISM magnetic fields

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Accuracy of training blood volume quantifi cation using a visual estimation tool

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World Journal of Emergency Medicine 2021年第3期12卷 174-178页

作者： Janett Kreutziger Philip Puchner Stefan Schmid wolfgang Mayer Harald Prossliner wolfgang Lederer Department of General and Surgical Intensive Care Medicine Medical University of InnsbruckInnsbruck 6020Austria Department of Anesthesiology and Critical Care Medicine Wels-Grieskirchen HospitalWels 4600Austria Department of Transfusion Medicine Medical University of InnsbruckInnsbruck 6020Austria Department of Anaesthesia and Intensive Care Medicine Medical University of InnsbruckInnsbruck 6020Austria

BACKGROUND:We investigated whether the use of a specially designed visual estimation tool may improve accuracy in quantifying blood volumes related to surface ***:A prospective,paired-control,single-blinded experimental study was performed at a medical *** and emergency medical personnel estimated various blood volumes on surfaces with varying absorptivity(carpet,towel,polyvinyl chloride,wooden fl ooring)in an experimental *** assessed the sensitivity of training blood volume quantifi cation using a self-designed visual estimation tool by comparing the accuracy of visual blood volume estimations before and after practical training with the ***:A total of 352 estimations by 44 participants were *** estimations improved significantly from pre-training to post-training(P<0.05).The sensitivity of blood volume quantifi cation was 33.0%after training with the visual estimation *** did not depend on age,profession,gender or years of the estimator’s professional ***:Training with a visual estimation tool by professional rescuers can improve the estimation accuracy of blood volumes spread on surfaces with varying absorptivity.

关键词： Academic training Emergency medicine Hemorrhage control Major bleeding

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Magnetic nanotechnology to study and promote axon growth

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Neural Regeneration Research 2015年第7期10卷 1037-1039页

作者： wolfgang Pita-Thomas Department of Anatomy and Neurobiology Washington University

After injury of the central and peripheral nervous systems,functional recovery is impaired by axon regeneration *** approaches for promoting axon growth have been attempted but their low efficacy has prevented them fr... 详细信息

关键词： Magnetic nanotechnology to study and promote axon growth

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Seasonal variations of PM10 -- Trace elements, PAHs and Levoglucosan: Rural sugarcane growing area versus coastal urban area in Southeastern Florida, USA. Part II: Elemental concentrations

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Particuology 2019年第5期17卷 99-108页

作者： Orhan Sevim oglu wolfgang F. Rogge Department of Environmental Engineering Cebze Technical University Cebze Kocaeli 41400 Turkey School of Engineering and Sierra Nevada Research Institute University of California Merced. 5200 North Lake Road Merced CA 95343 USA

The largest sugarcane-growing area in the United States is in South Florida. An estimated 7 million tons of dry sugarcane leafy biomass is removed from the fields before harvest by burning the leaves off the sugarcane stalks. Preharvest sugarcane leaf foliage burning is a major source of airborne particulate matter (PM), polycyclic aromatic hydrocarbons (PAHs), biogenic trace elements such as K, volatile hydrocarbons and other pollutants. In one harvesting period, approximately 22 million tons of C02, a greenhouse gas, is released, 7 million tons from leaf foliage preharvest burning alone and 15 million tons from burning sugarcane bagasse in the sugar mills for power generation. In this study, PMio was collected from Belle Glade, close to the sugarcane-growing area, and from Delray Beach, an urbanized area along the East Coast of Florida. The PM samples were analyzed for trace elements and close to organic compounds. To elucidate the importance of preharvest sugarcane biomass smoke emissions on air quality, 39 trace elements, 18 PAHs, and levoglucosan were selected to apportion ambient PM constituents. Al, Ca and to a great extend also Mg are the major soil-related trace elements and key markers for fugitive soil dust emissions. Similarly, sea salt aerosol blown from the Atlantic Ocean into Florida added appreciably to PMio trace elements concentration, especially Na and Cl. Approximately half of the sea salt aerosol (PMjo -portion) by mass is removed from the atmosphere during the transport of ocean air from Delray Beach to Belle Glade. Ambient acid displacement reactions caused a substantial portion of the Cl (30%) to be liberated from the sea salt aerosol to the atmosphere during transport as gaseous HC1. The PAH concentrations at Belle Glade were high when the biomass combustion markers levoglucosan and I< also showed the highest concentrations. This indicates that during the sugarcane harvest season, when leaf foliage is burned off just before harvest, most of

关键词： Urban versus rural Trace elements Sugarcane burning Rare earth elements Sea salt aerosol Potassium Levoglucosan PAHs

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Optimal Component Types for the Design of Construction Processes

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Tsinghua Science and Technology 2008年第S1期13卷 317-324页

作者： Felix Enge wolfgang Huhnt Chair of Process Modelling in Civil Engineering Berlin Institute of Technology

Within the project preparation phase, experienced professionals manually map design information onto process information with the aim to develop realistic and practical schedules. Unfortunately, the mapping itself is neither part of any underlying data model nor is it supported by current scheduling tools. As a consequence the process of setting up the data model for a schedule is still not supported formally. Huhnt and Enge described a modelling technique that addresses the missing linkage between design and process information[1]. The approach makes use of so called component types. These are template sub-processes that describe the fabrication procedure of typical building components. Decomposing the building into com-ponents and assigning a component type to each component allows for formal support while scheduling. Depending on the decomposition of the building into components and the complexity of the involved component types the specification effort differs. The question about optimal component types arises: Which layout of building components and component types results in minimal specification effort? This paper presents a branch and bound algorithm to determine optimal component types. For a given schedule, which has been modelled based on component types, all possible decompositions into sub-processes are determined. During the decomposition process the encountered configurations are compared. Those with minimal specifica-tion effort are registered. Theoretical and practical examples are examined and discussed.

关键词： scheduling process modelling planning processes construction processes branch and bound pattern matching search algorithm optimization

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New Microalloyed Steels for Forgings

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Journal of Iron and Steel Research International 2011年第S1期18卷 104-111页

作者： Christoph Keul wolfgang Bleck Department of Ferrous Metallurgy RWTH Aachen UniversityGermany

Microalloyed steels for forging applications have been newly developed in order to increase strength and toughness properties which thereby give the possibility for light weight *** properties of these steels are set up by a controlled cooling directly from the forging heat without an additional heat *** aim can be achieved on the one hand by a further development of precipitation hardening ferritic pearlitic steels (AFP-steel) due to an extended use of microalloying elements (AFP-M steel) and on the other hand by microalloyed steels which employ a bainitic microstructure (HDB steel).To adjust the targeted microstructure the temperature control has to be assured down to approx.500℃ for the AFP-M steels and down to approx.300℃ for the HDB steels.

关键词： forgings bainite microalloying controlled cooling

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