Browsing by Author "Kundu D."

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    On three-parameter generalized exponential distribution
    (Taylor and Francis Ltd., 2024) Basu S.; Kundu D.
    In this article, we consider the estimation of the three-parameter generalized exponential distribution. In presence of the unknown location parameter the usual maximum likelihood estimators do not exist for (Formula presented.) The maximum product of spacings method serves as good alternative since it always exists and yields consistent estimators in the entire parametric space. We develop the asymptotic distribution of the proposed estimators along-with a detailed discussion about the computational intricacies involved in implementing the product of spacing method. Extensive simulations have been performed to demonstrate the effectiveness of the proposed method for ? in the range (0, 1), in addition to a comparative study with some standard techniques known to provide consistent estimators, even for (Formula presented.) Furthermore, two real data sets have been analyzed to demonstrate the applicability of the proposed method. � 2023 Taylor & Francis Group, LLC.
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    Unveiling the composition of bio-earth from landfill mining and microplastic pollution
    (Springer Science and Business Media Deutschland GmbH, 2024) Jambhulkar R.; Sharma N.; Kundu D.; Kumar S.
    Landfill mining is the prominent solution for the recovery of resources from legacy waste. The bio-earth recovered from landfill mining is being utilized for a variety of applications like application as fertilizer. The presence of microplastic in the recovered bio-earth disrupts its usefulness. This study investigated the composition and microplastic pollution in bio-earth derived from landfill mining at the Bhandewadi landfill, Nagpur, India. Results provided insights into its characterization and presence of microplastic. The average moisture content of the bio-earth was 25.2 � 1.1% with total organic carbon of 14.3 � 0.6%. The bio-earth exhibited a C:N ratio of 16.9 � 5.0, volatile solid content of 24.6 � 1.0%, and ash content of 75.4 � 1.0%. Bulk density was 434.3 � 37.2�kg/m3, pH value 6.91 � 0.28, and electrical conductivity 4.6 � 0.7 dS/m. Total nitrogen content was 0.9 � 0.3%, available phosphorus 2.1 � 0.3�g/kg, and potassium and sodium contents of 12.7 � 0.4�g/kg and 3.9 � 0.3�g/kg, respectively. Heavy metals detected included Fe, Zn, Mn, Cu, Pb, Ni, Cr, and Cd. Microplastics in the bio-earth samples were assessed using attenuated total reflectance�Fourier-transform infrared spectroscopy (ATR-FTIR). The amount of microplastics averaged 100,150 � 29,286 items per kg (dry basis). Additionally, five specific polymer types were prominent as microplastics. Further research and mitigation strategies are necessary to ensure the safe and sustainable use of bio-earth in agriculture and horticulture. � The Author(s), under exclusive licence to Springer Nature Switzerland AG 2024.