ORCID Profile
0000-0001-6308-4924
Current Organisations
University of Glasgow School of Interdisciplinary Studies
,
NYU Langone Medical Center
,
NYU School of Medicine
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Publisher: Elsevier BV
Date: 09-2018
Publisher: Wiley
Date: 26-04-2021
DOI: 10.1002/NBM.4531
Abstract: In this work, we propose a free‐breathing magnetic resonance fingerprinting (MRF) method that can be used to obtain B 1 + ‐robust quantitative T 1 maps of the abdomen in a clinically acceptable time. A three‐dimensional MRF sequence with a radial stack‐of‐stars trajectory was implemented, and its k‐space acquisition ordering was adjusted to improve motion‐robustness in the context of MRF. The flip angle pattern was optimized using the Cramér–Rao Lower Bound, and the encoding efficiency of sequences with 300, 600, 900 and 1800 flip angles was evaluated. To validate the sequence, a movable multicompartment phantom was developed. Reference multiparametric maps were acquired under stationary conditions using a previously validated MRF method. Periodic motion of the phantom was used to investigate the motion‐robustness of the proposed sequence. The best performing sequence length (600 flip angles) was used to image the abdomen during a free‐breathing volunteer scan. When using a series of 600 or more flip angles, the estimated T 1 values in the stationary phantom showed good agreement with the reference scan. Phantom experiments revealed that motion‐related artifacts can appear in the quantitative maps and confirmed that a motion‐robust k‐space ordering is essential. The in vivo scan demonstrated that the proposed sequence can produce clean parameter maps while the subject breathes freely. Using this sequence, it is possible to generate B 1 + ‐robust quantitative maps of T 1 and B 1 + next to M 0 ‐weighted images under free‐breathing conditions at a clinically usable resolution within 5 min.
Publisher: Informa UK Limited
Date: 03-05-2018
Publisher: Springer International Publishing
Date: 2021
Publisher: Elsevier BV
Date: 11-2019
DOI: 10.1016/J.JENVMAN.2019.109505
Abstract: Water stress is an increasing burden in regions with arid climates, aquifer vulnerability, and erratic rainfall. Population growth and competing domestic, industrial, and agricultural uses are also stretching the capacity of water supply systems. Beyond groundwater extraction, surface water overuse, and inter-basin transfers, governments are exploring alternative sources amidst looming supply threats. These alternatives include desalination, greywater recycling, and reclaimed or recycled wastewater. The latter, also known as water reuse with varying levels of treatment, has been applied for irrigation, street cleaning, industrial processes, and groundwater recharge. However, reused water for potable purposes has seen limited uptake, due in part to lack of public acceptance. This article examines the dynamics of public acceptance for potable water reuse. The article's theoretical contribution is a formal mathematical model for understanding public acceptance of water reuse. The model conceptualizes how governments, water utilities and the public interact to facilitate or hinder acceptance of water supply sources, including potable reuse. The article concludes by applying the model to cases of water reuse in Windhoek, Namibia, and Singapore.
Publisher: World Scientific Pub Co Pte Ltd
Date: 2021
DOI: 10.1142/S2382624X20710046
Abstract: Progress in water conservation is dependent as much on human behavior as on the promise of new technologies. Digital feedback-based interventions present an opportunity to bring these two factors together, as increasingly sophisticated technologies can help change behaviors rather than simply solving problems caused by those behaviors. This paper explores the various options and opportunities for adopting feedback-based interventions — those that communicate information for the purpose of encouraging in iduals to alter water consumption habits. Lessons proposed are applicable to any realm in which in idual human behavior contributes to a collective environmental or social problem. Focusing on five determinants of success (design, delivery, content, integration, and commitment), this paper presents findings of related studies and fashions them into a suite of recommendations that serves as a template for practice and agenda for future research. The underlying theme — that technology is no absolute substitute for behavioral change but can be one catalyst for it — contributes to broader discussions about the relationship between human systems and the environment.
Publisher: Springer Science and Business Media LLC
Date: 13-03-2023
Publisher: SPIE
Date: 19-03-2015
DOI: 10.1117/12.2085033
Publisher: Elsevier BV
Date: 06-2018
Location: No location found
Location: Singapore
Location: United Kingdom of Great Britain and Northern Ireland
No related grants have been discovered for Cecilia Tortajada.