The Experts below are selected from a list of 360 Experts worldwide ranked by ideXlab platform
Kwasi Appeaning Addo - One of the best experts on this subject based on the ideXlab platform.
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urban and peri urban agriculture In developIng countries studied usIng remote sensIng and In Situ Methods
Remote Sensing, 2010Co-Authors: Kwasi Appeaning AddoAbstract:Urban farmIng, practiced by about 800 million people globally, has contributed significantly to food security and food safety. The practice has sustaIned livelihood of the urban and peri-urban low Income dwellers In developIng countries for many years. Its popularity among the urban low Income is largely due to lack of formal jobs and as a means of addIng up to household Income. There is IncreasIng need to sustaInably manage urban farmIng In developIng nations In recent times. Population Increase due to rural-urban migration and natural, coupled with Infrastructure developments are competIng with urban farmIng for available space and scarce resources such as water for irrigation. Lack of reliable data on the extent of urban/peri-urban areas beIng used for farmIng has affected developIng sustaInable policies to manage urban farmIng In Accra. UsIng ground based survey Methods to map the urban farmlands are Inherently problematic and prohibitively expensive. This has Influenced accurate assessment of the future role of urban farmIng In enhancIng food security. Remote sensIng, however, allows areas beIng used as urban farmlands to be rapidly established at relatively low cost. This paper will review advances In the use of remote sensIng technology to develop an Integrated monitorIng technique for urban farmlands In Accra.
Petr Novak - One of the best experts on this subject based on the ideXlab platform.
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advanced In Situ characterization Methods applied to carbonaceous materials
Journal of Power Sources, 2005Co-Authors: Petr Novak, Dietrich Goers, Laurence J Hardwick, Michael Holzapfel, Werner Scheifele, J Ufheil, Andreas WursigAbstract:Abstract This paper is an overview of the progress recently achieved In our laboratory In the development and application of four In Situ Methods; namely X-ray diffraction (both synchrotron-based and standard), Raman microscopy, differential electrochemical mass spectrometry (DEMS), and Infrared spectroscopy. We show representative results on graphite electrodes for each method as an illustration, In particular (i) the Influence of the lithium Intercalation and graphite exfoliation on the shift of the (0 0 2)-reflection of graphite, (ii) Raman sIngle poInt and mappIng measurements of graphite surface, (iii) gas evolution durIng solid electrolyte Interphase (SEI) formation on graphite electrodes, and (iv) the development of Infrared spectra durIng the SEI formation In γ-butyrolactone based electrolytes.
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advanced In Situ Methods for the characterization of practical electrodes In lithium ion batteries
Journal of Power Sources, 2000Co-Authors: Petr Novak, J C Panitz, Felix Joho, Martin Lanz, Roman Imhof, Marcello ColucciaAbstract:In this paper, an overview of the progress recently achieved In our laboratory In the development and application of four In Situ Methods, namely In Situ X-ray diffraction measurements (XRD), differential electrochemical mass spectrometry (DEMS), Infrared spectroscopy, and Raman microscopy, is presented. For bulk Investigations durIng cyclIng, In Situ XRD measurements are used, and explaIned here In the Instance of the reaction of graphite with lithium. Next, three surface-sensitive In Situ Methods are discussed, namely DEMS, Infrared spectroscopy, and Raman microscopy. As an illustration of In Situ Infrared spectroscopy and DEMS, we show results for both the oxidative and reductive decomposition of electrolyte solutions. FInally, a cell for In Situ Raman microscopy is described. This method is well suited, e.g., for an analysis of the structural properties of carbon materials, for a characterization of positive electrodes, and electrolytes of lithium-ion cells. As an example, Raman spectra measured In Situ at a sIngle LiCoO2 particle selected on the surface of a commercial electrode are discussed.
Andreas Wursig - One of the best experts on this subject based on the ideXlab platform.
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advanced In Situ characterization Methods applied to carbonaceous materials
Journal of Power Sources, 2005Co-Authors: Petr Novak, Dietrich Goers, Laurence J Hardwick, Michael Holzapfel, Werner Scheifele, J Ufheil, Andreas WursigAbstract:Abstract This paper is an overview of the progress recently achieved In our laboratory In the development and application of four In Situ Methods; namely X-ray diffraction (both synchrotron-based and standard), Raman microscopy, differential electrochemical mass spectrometry (DEMS), and Infrared spectroscopy. We show representative results on graphite electrodes for each method as an illustration, In particular (i) the Influence of the lithium Intercalation and graphite exfoliation on the shift of the (0 0 2)-reflection of graphite, (ii) Raman sIngle poInt and mappIng measurements of graphite surface, (iii) gas evolution durIng solid electrolyte Interphase (SEI) formation on graphite electrodes, and (iv) the development of Infrared spectra durIng the SEI formation In γ-butyrolactone based electrolytes.
Marius Costin - One of the best experts on this subject based on the ideXlab platform.
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Study of the evolution of transport properties Induced by additive processIng sand mold usIng X-ray computed tomography
Journal of Materials Processing Technology, 2020Co-Authors: Saptarshee Mitra, Mohamed El Mansori, Antonio RodrÍguez De Castro, Marius CostinAbstract:Accurate characterization of the mass transport properties of additively processed sand molds is essential In order to achieve reproducibility of the produced castIngs and control of gas defects In foundry Industries. The present work highlights the potential use of X-ray micro-computed tomography (μ-CT) to characterize the evolution of permeability and some major microstructural features of such additively processed sand molds. The evolution of mass transport properties of sand mold samples under specific processIng conditions met In additive manufacturIng and its Influence on the porosity, the permeability, the tortuosity, and the pore and throat size distributions were characterized from 3D images provided by X-Ray μ-CT. The obtaIned results showed that the mass transport properties of additively processed sand molds can be closely predicted by usIng non-destructive In Situ Methods, such that improvements to the castIng can be made to create more optimized 3D prInted structures for foundry applications.
Johan A. Martens - One of the best experts on this subject based on the ideXlab platform.
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Methods for In Situ spectroscopic probIng of the synthesis of a zeolite
Chemical Society Reviews, 2010Co-Authors: Alexander Aerts, Christine E A Kirschhock, Johan A. MartensAbstract:UnravelIng the crystallization mechanism of zeolites remaIns an IncreasIngly important challenge In chemistry. DurIng the last decade, In Situ spectroscopic Methods have provided an unprecedented level of detail of the underlyIng molecular mechanisms and their kInetics. Magnetic resonance, vibrational and X-ray absorption techniques have emerged as prIncipal tools for the In Situ observation of crystallization. In this tutorial review, we discuss how these In Situ Methods have contributed to our understandIng of the complex and diverse molecular processes that govern zeolite crystallization.
