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Noninvasive electron microscopy with interaction-free quantum measurements
(2009)Physical Review AWe propose the use of interaction-free quantum measurements with electrons to eliminate sample damage in electron microscopy. This might allow noninvasive molecular-resolution imaging. We show the possibility of such measurements in the presence of experimentally measured quantum decoherence rates and using a scheme based on existing charged particle trapping techniques.Journal Article -
HESS Opinions: Hydrologic predictions in a changing environment: behavioral modeling
(2011)Hydrology and Earth System SciencesMost hydrological models are valid at most only in a few places and cannot be reasonably transferred to other places or to far distant time periods. Transfer in space is difficult because the models are conditioned on past observations at particular places to define parameter values and unobservable processes that are needed to fully characterize the structure and functioning of the landscape. Transfer in time has to deal with the likely ...Journal Article -
Sources and contributions of wood smoke during winter in London: assessing local and regional influences
(2015)Atmospheric Chemistry and PhysicsDetermining the contribution of wood smoke to air pollution in large cities such as London is becoming increasingly important due to the changing nature of domestic heating in urban areas. During winter, biomass burning emissions have been identified as a major cause of exceedances of European air quality limits. The aim of this work was to quantify the contribution of biomass burning in London to concentrations of PM2.5 and determine ...Journal Article -
Ice nucleation by fertile soil dusts: relative importance of mineral and biogenic components
(2014)Atmospheric Chemistry and PhysicsAgricultural dust emissions have been estimated to contribute around 20% to the global dust burden. In contrast to dusts from arid source regions, the ice-nucleating abilities of which have been relatively well studied, soil dusts from fertile sources often contain a substantial fraction of organic matter. Using an experimental methodology which is sensitive to a wide range of ice nucleation efficiencies, we have characterised the immersion ...Journal Article -
Top-down estimates of European CH4 and N2O emissions based on four different inverse models
(2015)Atmospheric Chemistry and PhysicsEuropean CH4 and N2O emissions are estimated for 2006 and 2007 using four inverse modelling systems, based on different global and regional Eulerian and Lagrangian transport models. This ensemble approach is designed to provide more realistic estimates of the overall uncertainties in the derived emissions, which is particularly important for verifying bottom-up emission inventories. We use continuous observations from 10 European ...Journal Article -
Virus removal from drinking water using modified activated carbon fibers
(2021)RSC AdvancesActivated carbon (AC) exhibits superior sorption properties compared to other porous materials, due to well-developed porous structures and high surface areas. Therefore, it is widely applied in its various forms in water purification to remove a diverse range of contaminating species. The presence of viruses in fresh water bodies poses a serious issue for human health. However, AC has not yet been commonly applied to waterborne virus ...Journal Article -
A framework for assessing hydrological regime sensitivity to climate change in a convective rainfall environment: A case study of two medium-sized eastern Mediterranean catchments, Israel
(2015)Hydrology and Earth System SciencesA modeling framework is formulated and applied to assess the sensitivity of the hydrological regime of two catchments in a convective rainfall environment with respect to projected climate change. The study uses likely rainfall scenarios with high spatiotemporal resolution that are dependent on projected changes in the driving regional meteorological synoptic systems. The framework was applied to a case study in two medium-sized Mediterranean ...Journal Article -
Safe Local Navigation for Visually Impaired Users with a Time-of-Flight and Haptic Feedback Device
(2018)IEEE Transactions on Neural Systems and Rehabilitation EngineeringThis paper presents ALVU (Array of Lidars and Vibrotactile Units), a contactless, intuitive, hands-free, and discreet wearable device that allows visually impaired users to detect low- and high-hanging obstacles, as well as physical boundaries in their immediate environment. The solution allows for safe local navigation in both confined and open spaces by enabling the user to distinguish free space from obstacles. The device presented is ...Journal Article -
AI and Robotics for the City: Imagining and Transforming Social Infrastructure in San Francisco, Yokohama, and Lviv
(2017)Field Actions Science Reports ~ Artificial Intelligence and Robotics in the CityThis article looks at how existing and planned AI and robotics projects in three cities – San Francisco (United States), Yokohama (Japan), and Lviv (Ukraine) – aim to extend or build social infrastructure to achieve a particular desired vision of city life. The author has chosen contrasting cases both to highlight how particular cultures’ ways of thinking of the human-machine relationship matters for the kind of AI and robotics are ...Journal Article -
Non-exponential resistive switching in Ag2S memristors: a key to nanometer-scale non-volatile memory devices
(2015)NanoscaleThe dynamics of resistive switchings in nanometer-scale metallic junctions formed between an inert metallic tip and an Ag film covered by a thin Ag2S layer are investigated. Our thorough experimental analysis and numerical simulations revealed that the resistance change upon a switching bias voltage pulse exhibits a strongly non-exponential behaviour yielding markedly different response times at different bias levels. Our results demonstrate ...Journal Article