1,716 research outputs found
Emerg Infect Dis
The identification of new materials capable of sustaining a high electron emission current is a key requirement in the development of the next generation of cold cathode devices and technology. Compatibility with large volume material production methods is a further important practical consideration with solution chemistry-based methods providing for route to industrial scale-up. Here we demonstrate a new class of organic-inorganic hybrid material based on polypyrrole and zinc oxide (PPy/ZnO) nanofibers for use as a low-cost large-area cathode material. Solution chemistry based surfactant chemical oxidation polymerisation is used to synthesise the nanofibers and the macroscopic turn-on electric field for emission has been measured to be as low as 1.8 V/μm, with an emission current density of 1 mA/cm2 possible for an applied electric field of less than 4 V/μm. Specfic surface area measurements reveal a linear increase in the nanofiber surface area with ZnO incorporation, which when coupled with electron microscopy and x-ray diffraction analysis reveals that the wurtzite ZnO nanoparticles (around 45 nm in size) act as nucleation sites for the growth of PPy nanofibers. Our study demonstrates for the first time how an inorganic nanocrystal acting as a nucleation site allows for the tailored growth of the organic component without diminishing the overall electrical properties and opens the potential of a new type of organic-inorganic hybrid large-area cathode material. The broader impacts and advantages of using hybrid materials, when compared to other composite nanomaterial systems, as large area cathode materials are also discusse
Developing a 3D geometry for Urban energy modelling of Indian cities
The advancement in the field of Urban Building Energy
Modelling (UBEM) is assisting urban planners and
managers to design and operate cities to meet
environmental emission targets. The usefulness of the
UBEM depends upon the quality and level of details
(LoD) of the inputs to the model. The inadequacy and
quality of relevant input data pose challenges. This paper
analyses the usefulness of different methodologies for
developing a 3D building stock model of Ahmedabad,
India, recognizing data gaps and heterogenous
development of the city over time. It evaluates the
potentials, limitations, and challenges of remote sensing
techniques namely (a) Satellite imagery (b) LiDAR and
(c) Photogrammetry for this application. Further, the
details and benefits of data capturing through UAV
assisted Photogrammetry technique for the development
of the 3D city model are discussed. The research develops
potential techniques for feature detection and model
reconstruction using Computer vision on the
Photogrammetry reality mesh. Preliminary results
indicate that the use of supervised learning for Image
based segmentation on the reality mesh detects building
footprints with higher accuracy as compared to geometrybased segmentation of the point cloud. This methodology
has the potential to detect complex building features and
remove redundant objects to develop the semantic model
at different LoDs for urban simulations. The framework
deployed and demonstrated for the part of Ahmedabad
has a potential for scaling up to other parts of the city and
other Indian cities having similar urban morphology and
no previous data for developing a UBEM
Capacity building for GIS-based SDG indicators analysis with global high-resolution land cover datasets
The support of geospatial data and technologies for the United Nations Sustainable Development Goals (SDG) framework is critical
for assessing and monitoring key indicators, revealing the planet’s trajectory towards sustainability. The availability of global open
geospatial datasets, especially high-resolution land cover datasets, provides significant opportunities for computing and comparing
indicators across different regions and scales. However, barriers to their proficient use remain due to a lack of data awareness,
management and processing capacities using geographic information systems software. To address this, the ”Capacity Building for
GIS-based SDG Indicator Analysis with Global High-resolution Land Cover Datasets” project created open training material on
discovering, accessing, and manipulating global geospatial datasets for computing SDG indicators. The material focuses on water
and terrestrial ecosystems, urban environments, and climate, by leveraging world-class global geospatial datasets and using the Free
and Open Source Software QGIS. The training material is released under a Creative Commons Attribution 4.0 License, ensuring
broad accessibility and facilitating continuous improvement.The Educational and Capacity Building Initiative 2022 of the International Society for Photogrammetry and Remote Sensing (ISPRS).https://www.isprs.org/publications/archives.aspxam2024Geography, Geoinformatics and MeteorologySDG-02:Zero HungerSDG-06:Clean water and sanitationSDG-09: Industry, innovation and infrastructureSDG-11:Sustainable cities and communitiesSDG-12:Responsible consumption and productionSDG-13:Climate actionSDG-14:Life below waterSDG-15:Life on lan
Capacity Building for GIS-based SDG Indicator Analysis with Global High-resolution Land Cover Datasets
The support of geospatial data and technologies for the United Nations Sustainable Development Goals (SDG) framework is critical for assessing and monitoring key indicators, revealing the planet’s trajectory towards sustainability. The availability of global open geospatial datasets, especially high-resolution land cover datasets, provides significant opportunities for computing and comparing indicators across different regions and scales. However, barriers to their proficient use remain due to a lack of data awareness, management and processing capacities using geographic information systems software. To address this, the”Capacity Building for GIS-based SDG Indicator Analysis with Global High-resolution Land Cover Datasets” project created open training material on discovering, accessing, and manipulating global geospatial datasets for computing SDG indicators. The material focuses on water and terrestrial ecosystems, urban environments, and climate, by leveraging world-class global geospatial datasets and using the Free and Open Source Software QGIS. The training material is released under a Creative Commons Attribution 4.0 License, ensuring broad accessibility and facilitating continuous improvement
CAPACITY BUILDING FOR GIS-BASED SDG INDICATORS ANALYSIS WITH GLOBAL HIGH-RESOLUTION LAND COVER DATASETS
The support of geospatial data and technologies for the United Nations Sustainable Development Goals (SDG) framework is critical for assessing and monitoring key indicators, revealing the planet’s trajectory towards sustainability. The availability of global open geospatial datasets, especially high-resolution land cover datasets, provides significant opportunities for computing and comparing indicators across different regions and scales. However, barriers to their proficient use remain due to a lack of data awareness, management and processing capacities using geographic information systems software. To address this, the ”Capacity Building for GIS-based SDG Indicator Analysis with Global High-resolution Land Cover Datasets” project created open training material on discovering, accessing, and manipulating global geospatial datasets for computing SDG indicators. The material focuses on water and terrestrial ecosystems, urban environments, and climate, by leveraging world-class global geospatial datasets and using the Free and Open Source Software QGIS. The training material is released under a Creative Commons Attribution 4.0 License, ensuring broad accessibility and facilitating continuous improvement
Aid conditionalities, international Good Manufacturing Practice standards and local production rights: a case study of local production in Nepal
© 2015 Brhlikova et al. This is an Open Access article distributed under the terms of the Creative Commons Attribution License
(http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium,
provided the original work is properly credited. The Creative Commons Public Domain Dedication waiver (http://
creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.This work was supported by the Economic and Social Research Council and
the Department for International Development [RES-167-25-0110] through
the collaborative research project
Tracing Pharmaceuticals in South Asia
(2006
–
2009). In addition to the authors of this paper, the project team
included: Soumita Basu, Gitanjali Priti Bhatia, Erin Court, Abhijit Das, Stefan
Ecks, Patricia Jeffery, Roger Jeffery, Rachel Manners, and Liz Richardson.
Martin Chautari (Kathmandu) and the Centre for Health and Social Justice
(New Delhi) provided resources drawn upon in writing this paper but are
not responsible for the views expressed, nor are ESRC or DFID.
Ethical review was provided by the School of Social and Political Science at
the University of Edinburgh, and ethical approval in Nepal for the study
granted by the Nepal Health Research Council (NHRC)
Increased risk of second malignancies after in situ breast carcinoma in a population-based registry
Among 1276 primary breast carcinoma in situ (BCIS) patients diagnosed in 1972–2002 in the Southern Netherlands, 11% developed a second cancer. Breast carcinoma in situ patients exhibited a two-fold increased risk of second cancer (standardised incidence ratios (SIR): 2.1, 95% confidence interval (CI): 1.7–2.5). The risk was highest for a second breast cancer (SIR: 3.4, 95% CI: 2.6–4.3; AER: 66 patients per 10 000 per year) followed by skin cancer (SIR: 1.7, 95% CI: 1.1–2.6; AER: 17 patients per 10 000 per year). The increased risk of second breast cancer was similar for the ipsilateral (SIR: 1.9, 95% CI: 1.3–2.7) and contralateral (SIR: 2.0, 95% CI: 1.4–2.8) breast. Risk of second cancer was independent of age at diagnosis, type of initial therapy, histologic type of BCIS and period of diagnosis. Standardised incidence ratios of second cancer after BCIS (SIR: 2.3, 95% CI: 1.8–2.8) resembled that after invasive breast cancer (SIR: 2.2, 95% CI: 2.1–2.4). Surveillance should be directed towards second (ipsi- and contra-lateral) breast cancer
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