Adding Human Health Risk Analysis Tools to Geographic Information Systems   总被引：2，自引：0，他引：2  

Ferdi L. Hellweger  Lesley Hay Wilson  Eugenia M. Naranjo  & Paul J. Anid 《Transactions in GIS》2002,6(4):471-484

The development of a module for performing human health risk analysis is presented. This risk module differs from other tools in that it is integrated into a geographic information system (GIS) in a plug–in fashion. The main challenge in the development of the risk module was handling the many different spatial data structures in an open GIS environment. Selection of programming language and other development issues are discussed. The application of the risk module to two mining activities in Bolivia is described.  相似文献   

The Use of Waste Materials in the Passive Remediation of Mine Water Polution     

Lesley C. Batty  Paul L. Younger 《Surveys in Geophysics》2004,25(1):55-67

The contamination and resulting degradation of water coursesby effluents from abandoned and active mines is a world-wideproblem. Traditional methods of remediating the dischargesfrom mines involve the addition of chemicals and the utilisationof artificial energy sources. Over the last 15–20 years passivetreatment systems have been developed that harness naturalchemical and biological processes to ameliorate the potentiallytoxic effects of such discharges. There are many different typesof passive system, including compost wetlands, reducing andalkalinity producing systems (RAPS), permeable reactive barriersand inorganic media passive systems. Different waste materialscan be utilised as reactive media within each of these systems,dependent upon the type of mine water and treatment technology.In many cases the reactivity of these recycled waste materialsis key to the remedial performance of these systems. The materialsused may be organic (e.g., composts) or inorganic (e.g., blast furnaceslag) and where possible are sourced locally in order to minimisetransport costs. The remediation of mine waters in itself canproduce large quantities of waste products in the form of ironoxide sludge. Potential uses of this material in the productionof pigments and in the treatment of phosphate contaminatedwaters is also currently under investigation.The exploitation of what are traditionallythought of as waste materials within treatmentsystems for polluted waters is an expandingtechnology which provides great scope for recycling.  相似文献   

FAIR Geoscientific Samples and Data Need International Collaboration     

LEHNERT Kerstin  WYBORN Lesley  KLUMP Jens 《《地质学报》英文版》2019,93(Z1):32-33

正1 Introduction The primary goal of the Deep-time Digital Earth project is to develop an open collaboration and data sharing platform that enables the transition of deep-time geoscientific research to a Big Data driven paradigm.Such an open platform will require the ability to effectively and efficiently access and integrate a wide variety of digital Earth data,from remotely sensed Earth observations and geophysical data to data generated in  相似文献   

Development of Iron Speciation Reference Materials for Palaeoredox Analysis     

Lewis J. Alcott  Alexander J. Krause  Emma U. Hammarlund  Christian J. Bjerrum  Florian Scholz  Yijun Xiong  Andrew J. Hobson  Lesley Neve  Benjamin J. W. Mills  Christian Mrz  Bernhard Schnetger  Andrey Bekker  Simon W. Poulton 《Geostandards and Geoanalytical Research》2020,44(3):581-591

The development and application of geochemical techniques to identify redox conditions in modern and ancient aquatic environments has intensified over recent years. Iron (Fe) speciation has emerged as one of the most widely used procedures to distinguish different redox regimes in both the water column and sediments, and is the main technique used to identify oxic, ferruginous (anoxic, Fe(II) containing) and euxinic (anoxic, sulfidic) water column conditions. However, an international sediment reference material has never been developed. This has led to concern over the consistency of results published by the many laboratories that now utilise the technique. Here, we report an interlaboratory comparison of four Fe speciation reference materials for palaeoredox analysis, which span a range of compositions and reflect deposition under different redox conditions. We provide an update of extraction techniques used in Fe speciation and assess the effects of both test portion mass, and the use of different analytical procedures, on the quantification of different Fe fractions in sedimentary rocks. While atomic absorption spectroscopy and inductively coupled plasma‐optical emission spectrometry produced comparable Fe measurements for all extraction stages, the use of ferrozine consistently underestimated Fe in the extraction step targeting mixed ferrous–ferric minerals such as magnetite. We therefore suggest that the use of ferrozine is discontinued for this Fe pool. Finally, we report the combined data of four independent Fe speciation laboratories to characterise the Fe speciation composition of the reference materials. These reference materials are available to the community to provide an essential validation of in‐house Fe speciation measurements.  相似文献   

A checklist of the benthic and epiphytic marine dinoflagellates of New Zealand,including Rangitāhua/Kermadec Islands     

Lesley Rhodes  Kirsty F. Smith 《新西兰海洋与淡水研究杂志》2019,53(2):258-277

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The stratospheric wintertime response to applied extratropical torques and its relationship with the annular mode     

Peter A. G. Watson  Lesley J. Gray 《Climate Dynamics》2015,44(9-10):2513-2537

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Simulated X-ray cluster temperature maps     

Lesley I. Onuora  Scott T. Kay  Peter A. Thomas 《Monthly notices of the Royal Astronomical Society》2003,341(4):1246-1252

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Chandra and XMM–Newton observations of NGC 5253: analysis of the X-ray emission from a dwarf starburst galaxy     

Lesley K. Summers  Ian R. Stevens  David K. Strickland †  Timothy M. Heckman 《Monthly notices of the Royal Astronomical Society》2004,351(1):1-17

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Writing difference differently          下载免费PDF全文

Karen Fisher  Miriam Williams  Stephen FitzHerbert  Lesley Instone  Michelle Duffy  Sarah Wright  Sandie Suchet‐Pearson  Kate Lloyd  Laklak Burarrwanga  Ritjilili Ganambarr  Merrkiyawuy Ganambarr‐Stubbs  Banbapuy Ganambarr  Djawundil Maymuru  Bawaka Country 《New Zealand geographer》2015,71(1):18-33

This paper investigates the writing of situated knowledge and explores the possibilities of enacting difference by writing differently. We present a selection of research stories in which carrier bags, sounds, baskets, gardens and potatoes are interpreted less as objects of research or metaphors to aid in analysing phenomena, than as mediators of the stories. Our stories emphasise the ontological politics of engaging with and representing the relational, the messy, the spontaneous, the unpredictable, the non‐human and bodily experiences. These stories demonstrate how writing is performative and how it is integral to the production of knowledge.  相似文献   

The energetics and mass loss of the dwarf starburst Markarian 33     

Lesley K. Summers  Ian R. Stevens  David K. Strickland † 《Monthly notices of the Royal Astronomical Society》2001,327(2):385-396

We present ROSAT HRI X-ray data and optical imaging of the important dwarf starburst Markarian 33. We find an extended, complex, shell-like morphology in the X-ray emission, with an extent of ∼     , coincident with the bright star-forming regions at the centre of the galaxy. The physical extent of this X-ray emission from Mrk 33 is very similar to the observed H α emission, and suggests that the bulk of the X-ray emission is coming from an expanding superbubble.
We estimate the age and mass of Mrk 33's starburst to be 5.8 Myr and     respectively, with the energy injection rate in the central regions of the galaxy being ∼10⁴¹ erg s⁻¹, while the associated mass-loss rate from the star-forming regions is estimated to be ∼0.2 M_⊙ yr⁻¹. We suggest that the X-ray emission is predominantly powered by starburst-type activity, and argue that a blow-out in the form of a galactic wind is the most likely fate for Mrk 33, resulting in the loss of most of the galaxy's metal-enriched material and a small fraction (<1 per cent) of the ISM.  相似文献