28 research outputs found
Crop type mapping using high-resolution Sentinel-2 Satellite Data– A case study on Gujarat State
Mapping following products of Gujarat state using high-resolution Sentinel-2 satellite data
1. Crop type
2. Irrigated and Rainfed area
Major Activities
• Satellite imagery acquisition/ procurement and pre-processing (Sentinel-2, 10&20 m spatial resolution).
• Field information (ground reference data) and farmer interviews at selected locations and collection of validation points.
• Satellite Imagery analysis and interpretation for land use / land cover areas including irrigated and rainfed cultivated areas
Agricultural cropland extent and areas of South Asia derived using Landsat satellite 30-m time-series big-data using random forest machine learning algorithms on the Google Earth Engine cloud
The South Asia (India, Pakistan, Bangladesh, Nepal, Sri Lanka and Bhutan) has a staggering 900 million
people (~43% of the population) who face food insecurity or severe food insecurity as per United
Nations, Food and Agriculture Organization’s (FAO) the Food Insecurity Experience Scale (FIES). The
existing coarse-resolution (≥250-m) cropland maps lack precision in geo-location of individual farms
and have low map accuracies. This also results in uncertainties in cropland areas calculated fromsuch
products. Thereby, the overarching goal of this study was to develop a high spatial resolution (30-m
or better) baseline cropland extent product of South Asia for the year 2015 using Landsat satellite
time-series big-data and machine learning algorithms (MLAs) on the Google Earth Engine (GEE) cloud
computing platform. To eliminate the impact of clouds, 10 time-composited Landsat bands (blue,
green, red, NIR, SWIR1, SWIR2, Thermal, EVI, NDVI, NDWI) were derived for each of the three timeperiods
over 12 months (monsoon: Days of the Year (DOY) 151–300; winter: DOY 301–365 plus 1–60;
and summer: DOY 61–150), taking the every 8-day data from Landsat-8 and 7 for the years
2013–2015, for a total of 30-bands plus global digital elevation model (GDEM) derived slope band.
This 31-band mega-file big data-cube was composed for each of the five agro-ecological zones
(AEZ’s) of South Asia and formed a baseline data for image classification and analysis. Knowledgebase
for the Random Forest (RF) MLAs were developed using spatially well spread-out reference
training data (N = 2179) in five AEZs. The classification was performed on GEE for each of the five AEZs
using well-established knowledge-base and RF MLAs on the cloud. Map accuracies were measured
using independent validation data (N = 1185). The survey showed that the South Asia cropland
product had a producer’s accuracy of 89.9% (errors of omissions of 10.1%), user’s accuracy of 95.3%
(errors of commission of 4.7%) and an overall accuracy of 88.7%. The National and sub-national
(districts) areas computed from this cropland extent product explained 80-96% variability when
compared with the National statistics of the South Asian Countries. The full-resolution imagery can be
viewed at full-resolution, by zooming-in to any location in South Asia or the world, atwww.croplands.
org and the cropland products of South Asia downloaded from The Land Processes Distributed Active
Archive Center (LP DAAC) of National Aeronautics and Space Administration (NASA) and the United
States Geological Survey (USGS): https://lpdaac.usgs.gov/products/gfsad30saafgircev001/
Fructose transport-deficient Staphylococcus aureus reveals important role of epithelial glucose transporters in limiting sugar-driven bacterial growth in airway surface liquid.
Hyperglycaemia as a result of diabetes mellitus or acute illness is associated with increased susceptibility to respiratory infection with Staphylococcus aureus. Hyperglycaemia increases the concentration of glucose in airway surface liquid (ASL) and promotes the growth of S. aureus in vitro and in vivo. Whether elevation of other sugars in the blood, such as fructose, also results in increased concentrations in ASL is unknown and whether sugars in ASL are directly utilised by S. aureus for growth has not been investigated. We obtained mutant S. aureus JE2 strains with transposon disrupted sugar transport genes. NE768(fruA) exhibited restricted growth in 10Â mM fructose. In H441 airway epithelial-bacterial co-culture, elevation of basolateral sugar concentration (5-20Â mM) increased the apical growth of JE2. However, sugar-induced growth of NE768(fruA) was significantly less when basolateral fructose rather than glucose was elevated. This is the first experimental evidence to show that S. aureus directly utilises sugars present in the ASL for growth. Interestingly, JE2 growth was promoted less by glucose than fructose. Net transepithelial flux of D-glucose was lower than D-fructose. However, uptake of D-glucose was higher than D-fructose across both apical and basolateral membranes consistent with the presence of GLUT1/10 in the airway epithelium. Therefore, we propose that the preferential uptake of glucose (compared to fructose) limits its accumulation in ASL. Pre-treatment with metformin increased transepithelial resistance and reduced the sugar-dependent growth of S. aureus. Thus, epithelial paracellular permeability and glucose transport mechanisms are vital to maintain low glucose concentration in ASL and limit bacterial nutrient sources as a defence against infection
Planning southern Iraq: placing the progressive theories of Max Lock in Um Qasr, Margil, and Basra in the context of Iraqi national development, 1954–1956
Between 1954 and 1956, the architect, educator, and planner, Max Lock (1909–1988) produced a trilogy of plans to modernize the historical city of Basra and create new areas at Margil and Um Qasr in the south of Iraq. The New Basrah Plan was heavily inspired by the works of Patrick Geddes and aligned with contemporaries such as Lewis Mumford, Lock’s planning was progressive in scope and looked to differ from the planning of post-war principles in Britain through his notions of ‘civic surgery’. Contrary to this, his plans for Um Qasr and Margil focussed on infrastructure and the creation of more industrial areas not prioritizing people and place as highly as he did in the New Basrah Plan. Lock’s ‘Civic Surgery’ offered an alternative to mainstream thought by attempting to create usable, humanistic spaces, which hampered by politics and legislation, resulted in the plan’s shelving and were contradicted by his other works’ philosophies. New retrospective analysis of his underappreciated career reveals the complexities of his planning which this article demonstrates through the ‘failure’ of the New Basrah Plan and his plans at Um Qasr and Margil
Coastal architectures and politics of tourism: Leisurescapes in the global sunbelt
This volume offers a critical and complicated picture of how leisure tourism connected the world after the World War II, transforming coastal lands, traditional societies, and national economies in new ways. The 21 chapters in this book analyze selected case studies of architectures and landscapes around the world, contextualizing them within economic geographies of national development, the geopolitics of the Cold War, the legacies of colonialism, and the international dynamics of decolonization. Postwar leisure tourism evokes a rich array of architectural spaces and altered coastal landscapes, which is explored in this collection through discussions of tourism developments in the Mediterranean littoral, such as Greece, Turkey, and southern France, as well as compelling analyses of Soviet bloc seaside resorts along the Black Sea and Baltic coasts, and in beachscapes and tourism architectures of western and eastern hemispheres, from Southern California to Sri Lanka, South Korea, and Egypt. This collection makes a compelling argument that "leisurescapes," far from being supra-ideological and apolitical spatial expressions of modernization, development, and progress, have often concealed histories of conflict, violence, social inequalities, and environmental degradation. It will be of interest to architectural and urban historians, architects and planners, as well as urban geographers, economic and environmental historians. © 2023 selection and editorial matter, Sibel Bozdog? an, Panayiota Pyla, Petros Phokaides. All rights reserved
Strengthening Food Security Post-COVID-19 and Locust Attacks: Supporting crop insurance in Pakistan
This study mainly focussed on linking Insurance and Technology. The study will use comprehensive exiting environmental, weather and management data along with satellite derived crop spatial data. This information will be modelled using crop models to assess crop yield assessment at gram panchayat (GP) and required spatial information generated from near real time high resolution satellite images
Strengthening Food Security Post-COVID-19 and Locust Attacks
This study mainly focussed on linking Insurance and Technology. The study will use comprehensive exiting environmental, weather and management data along with satellite derived crop spatial data. This information will be modelled using crop models to assess crop yield assessment at gram panchayat (GP) and required spatial information generated from near real time high resolution satellite images