Using a top-down and bottom-up strategy to analyze high resolution aerial photographs of urban areas

Author(s):  
D. Phillips
PROTEOMICS ◽  
2017 ◽  
Vol 17 (23-24) ◽  
pp. 1600321 ◽  
Author(s):  
Kira Vyatkina ◽  
Lennard J. M. Dekker ◽  
Si Wu ◽  
Martijn M. VanDuijn ◽  
Xiaowen Liu ◽  
...  

2020 ◽  
Author(s):  
Dominique Arrouays ◽  
Zamir Libohova ◽  
Budiman Minansny ◽  
Vera Leatitia Mulder ◽  
Laura Poggio ◽  
...  

<p>Soils have critical relevance to global issues, such as food and water security, climate regulation, sustainable energy, desertification and biodiversity protection. All these examples require accurate national soil property information and there is a need to scientific support to develop reliable baseline soil information and pathways for measuring and monitoring soils. Soil sustainable management is a global issue, but effective actions require high-resolution data about soil properties. Two projects, GlobalSoilMap and SoilGrids, aim at delivering the first generation of high-resolution soil property grids for the globe, the first one by a bottom-up approach (from country to globe), the latter by top-down (global). The GLobAl Digital SOIL MAP (GLADSOILMAP) consortium brings together world scientific leaders involved in both projects. The consortium aims at developing and transferring methods to improve the prediction accuracy of soil properties and their associated uncertainty, by using legacy soil data and ancillary spatial information. This approach brings together new technologies and methods, existing soil databases and expert knowledge. The consortium aims at transferring methods to achieve convergence between top-down and bottom-up approaches, and to generate methods for delivering maps of soil properties. These maps are essential for communities from climate and environmental modeling to decision making and sustainable resources management at a scale that is relevant to soil management. The consortium will ensure links with the numerous actors in geosciences of the world, and will contribute to improving their skills in digital mapping and their national and international legibility. The actions include 4 main Work Packages (WP) subdivided into several tasks that are summarized below:</p><p> </p><p>WP0 Management of the project</p><p>WP1 Legacy and ancillary data for Digital Soil Mapping (DSM)</p><p>Test the potential of new ancillary data for DSM</p><p>Explore methodologies to merge and/or harmonize different products</p><p>Propose methods for harmonizing products to a common date</p><p> </p><p>WP2 Methods for sampling, modelling and mapping soils in space and time</p><p>Testing and developing new methods/models for prediction</p><p>Testing methods for estimating complete probability distribution</p><p> </p><p>WP3 Methods for estimating model and map uncertainty</p><p>Develop methods of uncertainty spatial assessment</p><p>Develop methods do deal with censored data/soft data</p><p>Solve the question of influence on the age of the rescued soil data on predictions</p><p> </p><p>WP4 Scientific outreach and capacity building</p><p>Produce an exhaustive review of GlobalSoilMap initiatives and results all over the world</p><p>Revise and update the GlobalSoilMap specifications by keeping them at the state-of-the-art level</p><p>Show relevance of gridded, Global, DSM by use cases and communication to end users</p><p> </p><p>The added value of the consortium is to allow a direct scientific exchange between members that should result in synthesis papers, in the identification of the major knowledge gaps, and in extending, deepening and disseminating knowledge of DSM, with the final aim to contribute to the achievement of global soil maps. Another added value of the consortium will certainly be to foster the creation of new ideas.</p><p> </p><p>Acknowledgements: the Consortium GLADSOILMAP is supported by LE STUDIUM Loire Valley Institute for Advanced studies.</p>


2013 ◽  
Author(s):  
Peter Trefonas ◽  
James W. Thackeray ◽  
Guorong Sun ◽  
Sangho Cho ◽  
Corrie Clark ◽  
...  

2015 ◽  
Vol 15 (17) ◽  
pp. 24839-24870 ◽  
Author(s):  
X. Fang ◽  
M. Shao ◽  
A. Stohl ◽  
Q. Zhang ◽  
J. Zheng ◽  
...  

Abstract. Benzene (C6H6) and toluene (C7H8) are toxic to humans and the environment. They are also important precursors of ground-level ozone and secondary organic aerosols and contribute substantially to severe air pollution in urban areas in China. Discrepancies exist between different bottom-up inventories for benzene and toluene emissions in Pearl River Delta (PRD) and Hong Kong (HK), which are emission hot spots in China. This study provides top-down estimates of benzene and toluene emissions in PRD and HK using atmospheric measurement data from a rural site in the area, Heshan, an atmospheric transport model and an inverse modeling method. The model simulations captured the measured mixing ratios during most pollution episodes. For PRD and HK, the benzene emissions estimated in this study for 2010 were 44 (12–75) Gg yr−1 and 5 (2–7) Gg yr−1 for PRD and HK, respectively, and the toluene emissions were 131 (44–218) Gg yr−1 and 6 (2–9) Gg yr−1, respectively. Temporal and spatial differences between the inversion estimate and four different bottom-up emission estimates are discussed, and it is proposed that more observations at different sites are urgently needed to better constrain benzene and toluene (and other air pollutants) emissions in PRD and HK in the future.


2021 ◽  
Vol 10 (2) ◽  
pp. 152
Author(s):  
Guruh Krisnantara ◽  
M. Sani Roychansyah

Urban areas in disaster prone require increased capacity in order to reduce the risk level. This study identifies resilience strategies in towards natural disasters in the village unit to obtain detailed data. This study uses field observations to find information about resilience strategies that have been carried out by the government and by the public in general and with snowball sampling techniques in each unit of analysis. Some strategies obtained were then made a typology of strategies found in several villages in the city of Yogyakarta. The results of this study are there are two types of strategies for increasing resilience in Yogyakarta, bottom-up strategy and top-down strategy. Bottom-up strategy is a strategy that was indeed initiated and carried out by the village although in the end it still cannot be separated from the role of main stakeholders, among others, is conducting disaster simulations, training in the use of emergency equipment, disaster socialization, planning, and infrastructure preparation. Top-down strategy is a strategy or policy carried out by the regional government in order to coordinate the level of resilience in the entire region of Yogyakarta, including the addition of the Kampung Tangguh Bencana (KTB), village expansion, organizing volunteers, and infrastructure development.


2021 ◽  
Vol 258 ◽  
pp. 09043
Author(s):  
Ali Maaruf ◽  
Pavel Oleynik

In the construction industry, there are two methods for constructing basements (Top-Down) and (Bottom-UP). The difference between them lies in the sequence of works, since in the (Bottom-Up) method the end of the excavation work is the necessary condition for the beginning of the substructure construction, and this is different from the (Top Down) method where excavation and construction of the substructure and the superstructure are carried out in parallel, which significantly reduces the project duration but at the same time increases the construction cost. Also there is a difference in terms of use for each of these two methods, for example, it is preferable to use the (Top-Down) in dense urban areas, where there is not enough space for the construction and where there are concerns that the adjacent buildings may be deformed as a result of construction, and this is what the (Bottom-Up) method cannot provide. In order to determine the optimal method from a mathematical point of view, 7 main criteria and 25 sub-criteria were identified, and the Analytic Hierarchy Process was used to solve this multi-criteria problem. Using the Expert Choice software, we found that the (Top-Down) method is preferred by 14.8% more than (Bottom-Up), and a sensitivity analysis was performed to determine which criteria dominated our optimal result.


2013 ◽  
Vol 12 (4) ◽  
pp. 043006 ◽  
Author(s):  
Peter Trefonas ◽  
James W. Thackeray ◽  
Guorong Sun ◽  
Sangho Cho ◽  
Corrie Clark ◽  
...  

2020 ◽  
Vol 58 (6) ◽  
pp. 864-872
Author(s):  
Kendall W. Cradic ◽  
Paula M. Ladwig ◽  
Ann L. Rivard ◽  
Waddah Katrangi ◽  
Karl Florian Wintgens ◽  
...  

AbstractBackgroundWhile quantitation methods for small-molecule and tryptic peptide bottom-up mass spectrometry (MS) have been well defined, quantitation methods for top-down or middle-up MS approaches have not been as well defined. Therapeutic monoclonal antibodies (t-mAbs) are a group of proteins that can be used to both demonstrate the advantages of top-down or middle-up detection methods over classic tryptic peptide bottom-up along with the growing need for robust quantitation strategies/software for these top-down or middle-up methods. Bottom-up proteolytic digest methods for the t-mAbs tend to suffer from challenges such as limited peptide selection due to potential interference from the polyclonal immunoglobulin background, complicated workflows, and inadequate sensitivity and specificity without laborious purification steps, and therefore have prompted the search for new detection and quantitation methods. Time-of-flight along with Orbitrap MS have recently evolved from the research and/or pharmaceutical setting into the clinical laboratory. With their superior mass measurement accuracy, resolution and scanning speeds, these are ideal platforms for top-down or middle-up characterization and quantitation.MethodsWe demonstrate a validated, robust, middle-up protein subunit detection and quantitation method for the IgG1 t-mAb, vedolizumab (VEDO), which takes advantage of the high resolution of the Orbitrap MS detection and quantitation software to increase specificity.ResultsValidated performance characteristics met pre-defined acceptance criteria with simple workflows and rapid turnaround times: characteristics necessary for implementation into a high-volume clinical MS laboratory.ConclusionsWhile the extraction method can easily be used with other IgG1 t-mAbs, the detection and quantitation method may become an option for measurement of other proteins.


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