ORCID Profile
0000-0001-5343-2198
Current Organisation
GHD
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Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 04-2019
Publisher: Springer Science and Business Media LLC
Date: 07-08-2023
DOI: 10.1038/S41467-023-39746-1
Abstract: Cities can host significant biological ersity. Yet, urbanisation leads to the loss of habitats, species, and functional groups. Understanding how multiple taxa respond to urbanisation globally is essential to promote and conserve bio ersity in cities. Using a dataset encompassing six terrestrial faunal taxa ( hibians, bats, bees, birds, carabid beetles and reptiles) across 379 cities on 6 continents, we show that urbanisation produces taxon-specific changes in trait composition, with traits related to reproductive strategy showing the strongest response. Our findings suggest that urbanisation results in four trait syndromes (mobile generalists, site specialists, central place foragers, and mobile specialists), with resources associated with reproduction and diet likely driving patterns in traits associated with mobility and body size. Functional ersity measures showed varied responses, leading to shifts in trait space likely driven by critical resource distribution and abundance, and taxon-specific trait syndromes. Maximising opportunities to support taxa with different urban trait syndromes should be pivotal in conservation and management programmes within and among cities. This will reduce the likelihood of biotic homogenisation and helps ensure that urban environments have the capacity to respond to future challenges. These actions are critical to reframe the role of cities in global bio ersity loss.
Publisher: Hindawi Limited
Date: 17-12-2019
DOI: 10.1002/ER.4330
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 05-2019
Publisher: Springer Science and Business Media LLC
Date: 16-01-2023
DOI: 10.1007/S10592-022-01492-0
Abstract: Genetic ersity among and within populations of all species is necessary for people and nature to survive and thrive in a changing world. Over the past three years, commitments for conserving genetic ersity have become more ambitious and specific under the Convention on Biological Diversity’s (CBD) draft post-2020 global bio ersity framework (GBF). This Perspective article comments on how goals and targets of the GBF have evolved, the improvements that are still needed, lessons learned from this process, and connections between goals and targets and the actions and reporting that will be needed to maintain, protect, manage and monitor genetic ersity. It is possible and necessary that the GBF strives to maintain genetic ersity within and among populations of all species, to restore genetic connectivity, and to develop national genetic conservation strategies, and to report on these using proposed, feasible indicators.
Publisher: IEEE
Date: 06-2018
Publisher: Wiley
Date: 10-01-2021
DOI: 10.1002/EST2.224
Abstract: Renewable energy sources (RES), such as photovoltaics (PV) and wind turbines have been widely applied as alternative energy solutions to address the global environmental concern and satisfy the energy demand. The large‐scale amalgamation of intermittent RES causes reliability and stability distress in the electric grid. To mitigate the nature of fluctuation from RES, a battery energy storage system (BESS) is considered one of the utmost effective and efficient arrangements which can enhance the operational flexibility of the power system. This article provides a comprehensive review to point out various applications of BESS technology in reducing the adverse impacts of PV and wind integrated systems. The key focus is given to battery connection techniques, power conversion system, in idual PV/wind, and hybrid system configuration. The application of BESS is categorized into three areas, active, reactive, and active‐reactive power features. The key findings of the existing research of BESS application are summarized and discussed along with several simulation results. By taking a thorough review, this article identifies the key challenges of BESS application including battery charging/discharging strategy, battery connection, power conversion efficiency, power converter, RES forecast, and battery lifetime and suggests future research directions that could be explored during the design, operation, and implementation of BESS technology in the power system.
Publisher: IEEE
Date: 11-2017
Publisher: Wiley
Date: 07-2023
Publisher: Australian Society of Archivists
Date: 28-11-2018
Publisher: IEEE
Date: 11-2018
Publisher: Wiley
Date: 14-06-2022
Abstract: Genetic ersity is one of the three main levels of bio ersity recognised in the Convention on Biological Diversity (CBD). Fundamental for species adaptation to environmental change, genetic ersity is nonetheless under‐reported within global and national indicators. When it is reported, the focus is often narrow and confined to domesticated or other commercial species. Several approaches have recently been developed to address this shortfall in reporting on genetic ersity of wild species. While multiplicity of approaches is helpful in any development process, it can also lead to confusion among policy makers and heighten a perception that conservation genetics is too abstract to be of use to organisations and governments. As the developers of five of the different approaches, we have come together to explain how various approaches relate to each other and propose a scorecard, as a unifying reporting mechanism for genetic ersity. Policy implications . We believe the proposed combined approach captures the strengths of its components and is practical for all nations and subnational governments. It is scalable and can be used to evaluate species conservation projects as well as genetic conservation projects.
Publisher: IEEE
Date: 11-2019
Publisher: Springer Science and Business Media LLC
Date: 24-10-2020
Publisher: Elsevier
Date: 2018
Publisher: Wiley
Date: 12-04-2022
DOI: 10.1111/BRV.12852
Abstract: Bio ersity underlies ecosystem resilience, ecosystem function, sustainable economies, and human well‐being. Understanding how bio ersity sustains ecosystems under anthropogenic stressors and global environmental change will require new ways of deriving and applying bio ersity data. A major challenge is that bio ersity data and knowledge are scattered, biased, collected with numerous methods, and stored in inconsistent ways. The Group on Earth Observations Bio ersity Observation Network (GEO BON) has developed the Essential Bio ersity Variables (EBVs) as fundamental metrics to help aggregate, harmonize, and interpret bio ersity observation data from erse sources. Mapping and analyzing EBVs can help to evaluate how aspects of bio ersity are distributed geographically and how they change over time. EBVs are also intended to serve as inputs and validation to forecast the status and trends of bio ersity, and to support policy and decision making. Here, we assess the feasibility of implementing Genetic Composition EBVs (Genetic EBVs), which are metrics of within‐species genetic variation. We review and bring together numerous areas of the field of genetics and evaluate how each contributes to global and regional genetic bio ersity monitoring with respect to theory, s ling logistics, metadata, archiving, data aggregation, modeling, and technological advances. We propose four Genetic EBVs: ( i ) Genetic Diversity ( ii ) Genetic Differentiation ( iii ) Inbreeding and ( iv ) Effective Population Size ( N e ). We rank Genetic EBVs according to their relevance, sensitivity to change, generalizability, scalability, feasibility and data availability. We outline the workflow for generating genetic data underlying the Genetic EBVs, and review advances and needs in archiving genetic composition data and metadata. We discuss how Genetic EBVs can be operationalized by visualizing EBVs in space and time across species and by forecasting Genetic EBVs beyond current observations using various modeling approaches. Our review then explores challenges of aggregation, standardization, and costs of operationalizing the Genetic EBVs, as well as future directions and opportunities to maximize their uptake globally in research and policy. The collection, annotation, and availability of genetic data has made major advances in the past decade, each of which contributes to the practical and standardized framework for large‐scale genetic observation reporting. Rapid advances in DNA sequencing technology present new opportunities, but also challenges for operationalizing Genetic EBVs for bio ersity monitoring regionally and globally. With these advances, genetic composition monitoring is starting to be integrated into global conservation policy, which can help support the foundation of all bio ersity and species' long‐term persistence in the face of environmental change. We conclude with a summary of concrete steps for researchers and policy makers for advancing operationalization of Genetic EBVs. The technical and analytical foundations of Genetic EBVs are well developed, and conservation practitioners should anticipate their increasing application as efforts emerge to scale up genetic bio ersity monitoring regionally and globally.
Publisher: MDPI AG
Date: 18-04-2020
DOI: 10.3390/EN13082003
Abstract: To deal with the technical challenges of renewable energy penetration, this paper focuses on improving the grid voltage and frequency responses in a hybrid renewable energy source integrated power system following load and generation contingency events. A consolidated methodology is proposed to employ a battery energy storage system (BESS) to contribute to voltage regulation through droop-type control and frequency regulation by assimilated inertia emulation (IE) and droop-type control. In addition, a novel frequency-dependent state-of-charge (SOC) recovery (FDSR) is presented to regulate BESS power consumption within the FDSR constraints and recharge the battery during idle periods whenever needed. The efficacy of the proposed BESS controller is demonstrated in an IEEE-9 bus system with a 22.5% photovoltaics (PV) and wind penetration level. The simulation results obtained manifest the satisfactory performance of the proposed controller in regulating simultaneous voltage and frequency in terms of lower rate of change of frequency and better frequency nadir. Furthermore, the proposed FDSR demonstrates its superiority at the time of SOC recovery compared to the conventional approach.
Publisher: Elsevier BV
Date: 06-2019
Publisher: Elsevier BV
Date: 04-2020
Publisher: IUCN, International Union for Conservation of Nature
Date: 24-06-2022
DOI: 10.2305/IUCN.CH.2022.07.EN
Abstract: One of the main challenges for conservation today is monitoring and understanding changes in bio ersity. Genetic ersity provides the foundation for bio ersity and is necessary for long-term survival, adaptation, and resilience not only for in iduals, but also for populations, species, and entire ecosystems. Monitoring genetic ersity across different time points is a first step to gain insight into the extent to which populations or species might be at risk, to guide conservation action and to provide evidence for solutions. This guidance document aims to be a resource that guides the reader through the decision and evaluation processes that take place when designing a genetic ersity monitoring programme and identifying the most appropriate set of species or populations to monitor. This guidance document is intended for practitioners (including governmental agencies, NGOs, but also locally responsible conservationists such as land managers) who need to monitor genetic ersity of species in the wild.
Publisher: IEEE
Date: 06-2019
Publisher: Elsevier BV
Date: 10-2020
Publisher: Elsevier BV
Date: 10-2019
No related grants have been discovered for Ujjwal Datta.