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  1. Book ; Online ; E-Book: Ocular tuberculosis

    Kumar, Atul / Chawla, Rohan / Sharma, Namrata

    (Essentials in ophthalmology)

    2017  

    Author's details Atul Kumar, Rohan Chawla, Namrata Sharma editors
    Series title Essentials in ophthalmology
    Language English
    Size 1 Online-Ressource (xi, 136 Seiten), Illustrationen
    Publisher Springer
    Publishing place Cham
    Publishing country Switzerland
    Document type Book ; Online ; E-Book
    Remark Zugriff für angemeldete ZB MED-Nutzerinnen und -Nutzer
    HBZ-ID HT019417546
    ISBN 978-3-319-57520-9 ; 9783319575193 ; 3-319-57520-1 ; 3319575198
    DOI 10.1007/978-3-319-57520-9
    Database ZB MED Catalogue: Medicine, Health, Nutrition, Environment, Agriculture

    Full text online

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  2. Article ; Online: Error performance of an L-PPM modulated ADR-based MIMO-VLC system with and without channel estimation error.

    Dixit, Vipul / Kumar, Atul

    Applied optics

    2023  Volume 62, Issue 10, Page(s) 2501–2509

    Abstract: In recent years, visible light communication (VLC) has emerged as a potential technique for beyond 5G communication networks. In this study, an angular diversity receiver (ADR) is used to propose a multiple-input multiple-output (MIMO) VLC system ... ...

    Abstract In recent years, visible light communication (VLC) has emerged as a potential technique for beyond 5G communication networks. In this study, an angular diversity receiver (ADR) is used to propose a multiple-input multiple-output (MIMO) VLC system employing L-pulse position modulation (
    Language English
    Publishing date 2023-05-01
    Publishing country United States
    Document type Journal Article
    ISSN 1539-4522
    ISSN (online) 1539-4522
    DOI 10.1364/AO.478994
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Surface topographic characterization of optical storage devices by Digital Holographic Microscopy.

    Kumar, Atul / Nirala, Anil Kumar

    Micron (Oxford, England : 1993)

    2023  Volume 170, Page(s) 103459

    Abstract: In this study, we have used Digital Holographic Microscopy (DHM) for surface topographic characterization of the optical storage devices. Optical storage devices like Compact Discs (CDs) and Digital Versatile discs (DVDs) are used worldwide for memory ... ...

    Abstract In this study, we have used Digital Holographic Microscopy (DHM) for surface topographic characterization of the optical storage devices. Optical storage devices like Compact Discs (CDs) and Digital Versatile discs (DVDs) are used worldwide for memory storage, grating, sensing and spectroscopy applications. These devices can store the information in binary form on a spiral track in the data recording layer. We demonstrate that these data tracks can be characterized through DHM and one can decode the binary data in transmission mode. The experimental results are shown for blank (without data) and burned (with data) areas of CDs and DVDs. The average width of the CD and DVD data track is experimentally found to be 600 ± 30 nm & 230 ± 20 nm, respectively and the thickness of the data recording track is obtained as 80 ± 10 nm. The obtained results are verified by Field Emission Scanning Electron Microscopy (FESEM) measurements and found a very close agreement between the two results. In addition, the proposed method can also be used for manufacturing defect identification and measurement.
    Language English
    Publishing date 2023-04-12
    Publishing country England
    Document type Journal Article
    ZDB-ID 207808-9
    ISSN 1878-4291 ; 0047-7206 ; 0968-4328
    ISSN (online) 1878-4291
    ISSN 0047-7206 ; 0968-4328
    DOI 10.1016/j.micron.2023.103459
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    In stock of ZB MED Cologne/Königswinter

    Zs.A 1927: Show issues Location:
    Je nach Verfügbarkeit (siehe Angabe bei Bestand)
    bis Jg. 1994: Bestellungen von Artikeln über das Online-Bestellformular
    Jg. 1995 - 2021: Lesesall (1.OG)
    ab Jg. 2022: Lesesaal (EG)

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  4. Article ; Online: Regio- and Stereoselective Intermolecular 1,2-Difunctionalization of Terminal Alkynes: An Approach to Access (

    Kumar, Rajesh / Bhadoria, Deepak / Kant, Ruchir / Kumar, Atul

    The Journal of organic chemistry

    2024  Volume 89, Issue 5, Page(s) 2873–2884

    Abstract: We have developed the first ... ...

    Abstract We have developed the first I
    Language English
    Publishing date 2024-02-14
    Publishing country United States
    Document type Journal Article
    ZDB-ID 123490-0
    ISSN 1520-6904 ; 0022-3263
    ISSN (online) 1520-6904
    ISSN 0022-3263
    DOI 10.1021/acs.joc.3c02155
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    In stock of ZB MED Cologne/Königswinter

    Zs.A 4473: Show issues Location:
    Je nach Verfügbarkeit (siehe Angabe bei Bestand)
    bis Jg. 1994: Bestellungen von Artikeln über das Online-Bestellformular
    Jg. 1995 - 2021: Lesesall (2.OG)
    ab Jg. 2022: Lesesaal (EG)

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  5. Article ; Online: Surface topographic characterization of optical storage devices by Digital Holographic Microscopy

    Kumar, Atul / Nirala, Anil Kumar

    Micron. 20232023 July 12, Apr. 12, v. 170 p.103459-

    2023  

    Abstract: In this study, we have used Digital Holographic Microscopy (DHM) for surface topographic characterization of the optical storage devices. Optical storage devices like Compact Discs (CDs) and Digital Versatile discs (DVDs) are used worldwide for memory ... ...

    Abstract In this study, we have used Digital Holographic Microscopy (DHM) for surface topographic characterization of the optical storage devices. Optical storage devices like Compact Discs (CDs) and Digital Versatile discs (DVDs) are used worldwide for memory storage, grating, sensing and spectroscopy applications. These devices can store the information in binary form on a spiral track in the data recording layer. We demonstrate that these data tracks can be characterized through DHM and one can decode the binary data in transmission mode. The experimental results are shown for blank (without data) and burned (with data) areas of CDs and DVDs. The average width of the CD and DVD data track is experimentally found to be 600 ± 30 nm & 230 ± 20 nm, respectively and the thickness of the data recording track is obtained as 80 ± 10 nm. The obtained results are verified by Field Emission Scanning Electron Microscopy (FESEM) measurements and found a very close agreement between the two results. In addition, the proposed method can also be used for manufacturing defect identification and measurement.
    Keywords electron microscopy ; memory ; spectroscopy ; Digital holography ; Microscopy ; Optical storage device ; Defect-detection ; Surface topography
    Language English
    Dates of publication 2023-0412
    Publishing place Elsevier Ltd
    Document type Article ; Online
    Note Pre-press version
    ZDB-ID 207808-9
    ISSN 1878-4291 ; 0047-7206 ; 0968-4328
    ISSN (online) 1878-4291
    ISSN 0047-7206 ; 0968-4328
    DOI 10.1016/j.micron.2023.103459
    Database NAL-Catalogue (AGRICOLA)

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    In stock of ZB MED Cologne/Königswinter

    Zs.A 1927: Show issues Location:
    Je nach Verfügbarkeit (siehe Angabe bei Bestand)
    bis Jg. 1994: Bestellungen von Artikeln über das Online-Bestellformular
    Jg. 1995 - 2021: Lesesall (1.OG)
    ab Jg. 2022: Lesesaal (EG)

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  6. Article: The Newly Available FAERS Public Dashboard: Implications for Health Care Professionals.

    Kumar, Atul

    Hospital pharmacy

    2018  Volume 54, Issue 2, Page(s) 75–77

    Language English
    Publishing date 2018-08-23
    Publishing country United States
    Document type Editorial
    ZDB-ID 1468893-1
    ISSN 0018-5787
    ISSN 0018-5787
    DOI 10.1177/0018578718795271
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    In stock of ZB MED Cologne/Königswinter

    Zs.B 1758: Show issues Location:
    Je nach Verfügbarkeit (siehe Angabe bei Bestand)
    bis Jg. 2021: Bestellungen von Artikeln über das Online-Bestellformular
    ab Jg. 2022: Lesesaal (EG)
    Zs.MG 21: Show issues

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  7. Article ; Online: Higher-order assembly of BSA gold nanoclusters using supramolecular host-guest chemistry: a 40% absolute fluorescence quantum yield.

    Maity, Anjan / Kumar, Atul

    Nanoscale advances

    2022  Volume 4, Issue 14, Page(s) 2988–2991

    Abstract: Herein, we report for the first time a highly emissive higher-order assembled structure of BSA-Au NCs in the presence of cucurbit[7]uril, which enhances the absolute fluorescence quantum yield of BSA-Au NCs up to 40%. Cucurbit[7]uril neutralizes the ... ...

    Abstract Herein, we report for the first time a highly emissive higher-order assembled structure of BSA-Au NCs in the presence of cucurbit[7]uril, which enhances the absolute fluorescence quantum yield of BSA-Au NCs up to 40%. Cucurbit[7]uril neutralizes the surface charge of BSA-Au NCs, and hence aggregation happens. This aggregation shows reversible disaggregation in the presence of adamantylamine.
    Language English
    Publishing date 2022-06-01
    Publishing country England
    Document type Journal Article
    ISSN 2516-0230
    ISSN (online) 2516-0230
    DOI 10.1039/d2na00123c
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article ; Online: Error analysis of L-PPM modulated MIMO based multi-user NOMA-VLC system with perfect and imperfect SIC.

    Dixit, Vipul / Kumar, Atul

    Applied optics

    2022  Volume 61, Issue 4, Page(s) 858–867

    Abstract: By offering a wide license-free spectrum, visible light communication (VLC) has emerged as a game-changing technology for networks beyond 5G. In this study, the multiple-input multiple-output (MIMO) technology is combined with a non-orthogonal multiple ... ...

    Abstract By offering a wide license-free spectrum, visible light communication (VLC) has emerged as a game-changing technology for networks beyond 5G. In this study, the multiple-input multiple-output (MIMO) technology is combined with a non-orthogonal multiple access VLC (NOMA-VLC) system to provide a reliable error-free high data rate network for multi-user scenarios. A generalized
    Language English
    Publishing date 2022-02-21
    Publishing country United States
    Document type Journal Article
    ISSN 1539-4522
    ISSN (online) 1539-4522
    DOI 10.1364/AO.440511
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article: Towards convergence of central grid and decentralised electricity solutions – Assessment of Indian rural electrification cases using a socio-technical framework

    Palit, Debajit / Kumar, Atul

    International Energy Initiative Energy for sustainable development. 2022 Dec., v. 71

    2022  

    Abstract: The paper examines the dynamics of rural electrification in India and explores the transition to a complementary convergence of decentralised and centralised electricity systems for sustainable rural electricity services. A novel socio-technical ... ...

    Abstract The paper examines the dynamics of rural electrification in India and explores the transition to a complementary convergence of decentralised and centralised electricity systems for sustainable rural electricity services. A novel socio-technical framework of analysis for assessment of cases of rural electricity systems is developed and applied in Indian villages to explore the interplays of different elements of rural electricity systems, enabling and hindering factors, and actors and institutions that affect the governance and sustenance of rural electrification. A mixed research method, along with document analysis, was applied to study the socio-technical perspectives, using 21 indicators representing nine different interplays of elements of rural electricity systems. The analysis reveals there is a significant effect of governance on technology performance, which in turn affects customer practices. There is also a significant correlation between customer practices and governance. Policy enablers along with strong institutions and actors - both at the subnational and local level - are key drivers to effective governance. Furthermore, irrespective of centralised or decentralised technology, adequacy and reliability of electricity supply and effective customer service delivery at the local level are important i.e., both supply reliability and quality, and customer service quality are equally important. The findings have clear policy implications for the governance of the electricity sector in India.
    Keywords customer service ; electricity ; energy ; governance ; issues and policy ; rural electrification ; sustainable development ; India
    Language English
    Dates of publication 2022-12
    Size p. 27-53.
    Publishing place Elsevier Inc.
    Document type Article
    ISSN 0973-0826
    DOI 10.1016/j.esd.2022.08.026
    Database NAL-Catalogue (AGRICOLA)

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  10. Article ; Online: Minerals and energy interface in energy transition pathways: A systematic and comprehensive review

    Śrīvāstava, Nidhi / Kumar, Atul

    Journal of cleaner production. 2022 Nov. 20, v. 376 p.134354-

    2022  

    Abstract: Since energy-related carbon dioxide emissions represent two-thirds of all greenhouse gases, a transition towards cleaner and renewable energy is imperative. Moreover, the carbon neutrality targets set by countries hinge upon increased uptake of renewable ...

    Abstract Since energy-related carbon dioxide emissions represent two-thirds of all greenhouse gases, a transition towards cleaner and renewable energy is imperative. Moreover, the carbon neutrality targets set by countries hinge upon increased uptake of renewable energy and storage. Some of these energy transition (ET) interventions are highly mineral intensive and depend upon critical minerals (CM), which are scarce and face supply challenges. However, what is meant by ‘critical’ is not uniform and static. The interface between ET and minerals is still an emerging area in policy studies literature. This paper presents a systematic and comprehensive review of 68 studies from a policy perspective studying the critical minerals – ET nexus. Most literature has approached the issue from the perspective of economics or geopolitics, followed by a broad governance approach. Very little attention has been given to legal and institutional aspects and justice in particular. The review suggests that the main challenges associated with the subject relate to the criticality of minerals, raw material security, trade and geopolitics, circular economy strategies, environmental and social impacts, and energy justice.
    Keywords carbon ; carbon dioxide ; circular economy ; energy ; governance ; greenhouses ; issues and policy ; politics ; raw materials ; renewable energy sources ; trade ; Critical minerals ; Energy transition ; Minerals-energy nexus ; Energy governance ; Low carbon pathways ; Minerals ; Renewable energy
    Language English
    Dates of publication 2022-1120
    Publishing place Elsevier Ltd
    Document type Article ; Online
    ISSN 0959-6526
    DOI 10.1016/j.jclepro.2022.134354
    Database NAL-Catalogue (AGRICOLA)

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