1,727,728 research outputs found
Effect of horizon roughness on lateral continuity and amplitude variation of deeper reflections
No full textThe aim of this study is to investigate the fractal properties of natural rough topographies and to study seismic wave scattering from them, in particular their effects on the deeper reflection continuity and amplitude variation. The distortions caused by shallow rough horizons to the deeper reflections are very significant if the rough horizons are associated with high acoustic impedance contrast. This problem has been experienced in many petroleum provinces such as to the west of Ireland and in the Faeroe-Shetland basin, where thick Tertiary basalt flows are present above the sedimentary sequences of interest. Seismic reflection data from the Faeroe-Shetland basin clearly shows the sub-basalt target horizons to be highly discontinuous and low frequency, which make accurate structural or stratigraphic interpretations very difficult. In this work a forward modelling approach is followed where Depth-Velocity (DV) models with rough interfaces are prepared and input to Finite-Difference (FD) modelling to produce synthetic seismic sections which are then compared to the original seismic reflection data.There are two major aspects of the work: firstly to understand the reflection characteristics from large as well as small scale structures present on geological interfaces; and secondly to obtain the roughness of the real sub-surface horizons present in the area for incorporation in realistic DV models, so that their net scattering effects on deeper reflections can be ascertained. Initially simple models comprising a sinusoidal interface with different heights and spatial wavelengths were prepared and the focusing/defocusing effects on the underlying constant reflection coefficient plane horizons were studied. Geometric expressions were derived to demonstrate that the fresnel zone width is larger over the synclines than the anticlines so that the amplitude effects on underlying reflectors can be quantified.</p
A new genus and species of subfamily Dendrothripinae (Thysanoptera: Thripidae) from India
No full textPal, Shash, Kumar, Vikas, Panjaliya, Rakesh Kumar, Tyagi, Kaomud (2022): A new genus and species of subfamily Dendrothripinae (Thysanoptera: Thripidae) from India. Zootaxa 5175 (3): 383-388, DOI: 10.11646/zootaxa.5175.3.
Insights into Allosteric Inhibition of AcrB Efflux Pump: Role of Distinct Binding Pockets, Protomer Preferences, and Crosstalk Disruption
No full text<p>Supplementary Information for the manuscript "Insights into Allosteric Inhibition of AcrB Efflux Pump: Role of Distinct Binding Pockets, Protomer Preferences, and Crosstalk Disruption" by Rakesh Kumar Roy, Abhishek Bera and Niladri Patra, Department of Chemistry and Chemical Biology, Indian Institute of Technology (ISM) Dhanbad, Dhanbad - 826004, India</p>
FIGURE 5 in Hemidactylus paucifasciatus (Squamata: Gekkonidae), a new species of large-bodied, tuberculate gecko from Northern Odisha, India
No full textFIGURE 5. Hemidactylus paucifasciatus sp. nov. in life: (A) male, holotype, ZSI-R-28357 (B) male, paratype, NCBS-BH668 and (C) sub-adult female, paratype, ZSI-CZRC-7117. Photos by Rakesh Kumar Mohalik (A, C) and Pratyush P. Mohapatra (B).Published as part of Mohapatra, Pratyush P., Agarwal, Ishan, Mohalik, Rakesh Kumar, Dutta, Sushil K. & Khandekar, Akshay, 2023, Hemidactylus paucifasciatus (Squamata: Gekkonidae), a new species of large-bodied, tuberculate gecko from Northern Odisha, India, pp. 365-382 in Zootaxa 5301 (3) on page 375, DOI: 10.11646/zootaxa.5301.3.3, http://zenodo.org/record/803040
ONTOGENETIC ORGANIZATION OF THE FMRFAMIDE IMMUNOREACTIVITY IN THE NERVUS TERMINALIS OF THE LUNGFISH, NEOCERATODUS FORSTERI
No full textMachine Learning-Guided Discovery of AcrB and MexB Efflux Pump Inhibitors
No full textSupplementary Information for manuscript "Machine Learning-Guided Discovery of AcrB and MexB Efflux Pump Inhibitors" by Abhishek Bera, Rakesh Kumar Roy, Pritish Joshi and Niladri Patra, Department of Chemistry and Chemical Biology, Indian Institute of Technology (ISM) Dhanbad, Dhanbad - 826004, India.
Email - [email protected]
Supplemental material for From Administrative to Political Evaluation: Estimating Water, Sanitation, and Hygiene Indicators for Parliamentary Constituencies in India
No full textSupplemental Material for From Administrative to Political Evaluation: Estimating Water, Sanitation, and Hygiene Indicators for Parliamentary Constituencies in India by Pritha Chatterjee, Rockli Kim, Akshay Swaminathan, Rakesh Kumar, S.V. Subramanian1 in Journal of Development Policy and Practice</p
FIGURES 8–11 in A new genus and species of subfamily Dendrothripinae (Thysanoptera: Thripidae) from India
No full textFIGURES 8–11. Jammuthrips paikuliensis gen. et sp. n. Female; (8) Head and pronotum; (9) Antenna; (10) Head, pro-, meso-, and metasterna; (11) Meso- and metanotum; (12) Tergites I–X.Published as part of Pal, Shash, Kumar, Vikas, Panjaliya, Rakesh Kumar & Tyagi, Kaomud, 2022, A new genus and species of subfamily Dendrothripinae (Thysanoptera: Thripidae) from India, pp. 383-388 in Zootaxa 5175 (3) on page 386, DOI: 10.11646/zootaxa.5175.3.5, http://zenodo.org/record/700369
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