Akshay Mehra

ORCID: 0000-0002-3966-1469
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About
Contact & Profiles
Research Areas
  • Paleontology and Stratigraphy of Fossils
  • Geology and Paleoclimatology Research
  • Geochemistry and Geologic Mapping
  • Hydrocarbon exploration and reservoir analysis
  • Geological and Geochemical Analysis
  • Geological Modeling and Analysis
  • Industrial Vision Systems and Defect Detection
  • Isotope Analysis in Ecology
  • Coral and Marine Ecosystems Studies
  • Marine Biology and Ecology Research
  • Digital Imaging for Blood Diseases
  • Chemical Thermodynamics and Molecular Structure
  • Soil Geostatistics and Mapping
  • Methane Hydrates and Related Phenomena
  • Advanced Theoretical and Applied Studies in Material Sciences and Geometry
  • Archaeology and Natural History
  • Ecology and Conservation Studies
  • Industrial Engineering and Technologies
  • Smart Agriculture and AI
  • Geological and Geophysical Studies
  • Marine and environmental studies
  • Cephalopods and Marine Biology
  • Paleontology and Evolutionary Biology
  • Hydrology and Sediment Transport Processes
  • Geological Studies and Exploration

University of Washington
2023-2024

Princeton University
2018-2024

Earth and Space Research
2023-2024

Dartmouth College
2020-2023

Internet of Things and Image processing have been so far applied for various applications independently. Their individual application in the field agriculture exists has achieved certain degree success, however combination both these technology is non-existent. This paper describes an approach to combine IoT image order determine environmental factor or man-made (pesticides/fertilizers) which specifically hindering growth plant. Using sensing network takes readings crucial factors leaf...

10.1109/csitss.2016.7779434 article EN 2016-10-01
Úna C. Farrell Rifaat Samawi Savitha Anjanappa Roman Klykov Oyeleye O. Adeboye and 95 more Heda Agić Anne‐Sofie C. Ahm Thomas H. Boag Fred Bowyer Jochen J. Brocks Tessa N. Brunoir Donald E. Canfield Xiaohong Chen Meng Cheng Matthew O Clarkson Devon B. Cole David R. Cordie Peter W. Crockford Huan Cui Tais W. Dahl Lucas Del Mouro Keith Dewing Stephen Q. Dornbos Nadja Drabon Julie A. Dumoulin Joseph F. Emmings Cecilia R. Endriga Tiffani Fraser Robert R. Gaines Richard M. Gaschnig Timothy M. Gibson Geoffrey J. Gilleaudeau Benjamin C. Gill Karin Goldberg Romain Guilbaud Galen P. Halverson Emma U. Hammarlund Kalev Hantsoo Miles A. Henderson Malcolm S.W. Hodgskiss Tristan J. Horner Jon M. Husson Benjamin W. Johnson Pavel Kabanov C. Brenhin Keller Julien Kimmig Michael A. Kipp Andrew H. Knoll Timmu Kreitsmann Marcus Kunzmann Florian Kurzweil Matthew A. LeRoy Chao Li Alex Lipp David K. Loydell Xinze Lu Francis A. Macdonald Joseph M. Magnall Kaarel Mänd Akshay Mehra Michael J. Melchin Austin J. Miller N. Tanner Mills Chiza N. Mwinde Brennan O’Connell Lawrence M. Och Frantz Ossa Ossa Anaïs Pagès Päärn Paiste Camille A. Partin Shanan E. Peters P. Yu. Petrov Tiffany Playter Stephanie Plaza‐Torres Susannah M. Porter Simon W. Poulton Sara B. Pruss Sylvain Richoz Samantha Ritzer Alan D. Rooney Swapan Sahoo Shane D. Schoepfer Judith A. Sclafani Yanan Shen Oliver Shorttle Sarah P. Slotznick Emily F. Smith Sam Spinks Richard Stockey Justin V. Strauss Eva E. Stüeken Sabrina Tecklenburg Danielle Thomson Nicholas J. Tosca Gabriel J. Uhlein Maoli N. Vizcaíno Huajian Wang Tristan White Philip R. Wilby Christina R. Woltz

Geobiology explores how Earth's system has changed over the course of geologic history and living organisms on this planet are impacted by or indeed causing these changes. For decades, geologists, paleontologists, geochemists have generated data to investigate topics. Foundational efforts in sedimentary geochemistry utilized spreadsheets for storage analysis, suitable several thousand samples, but not practical scalable larger, more complex datasets. As results accumulated, researchers...

10.1111/gbi.12462 article EN Geobiology 2021-07-05

Significance Little is known about how the Ediacaran index fossil Cloudina lived and what impact it had on its surroundings. This uncertainty due to fact that often preserved with same mineralogy as rocks in which found; lack of density contrast means traditional imaging techniques cannot be used reconstruct measure situ populations. Recently, researchers have suggested was a framework reef builder actively adapted changing environmental conditions. In this paper, we use serial grinding...

10.1073/pnas.1719911115 article EN Proceedings of the National Academy of Sciences 2018-02-26

Snowball Earth episodes, times when the planet was covered in ice, represent most extreme climate events Earth's history. Yet, mechanisms that drive their initiation remain poorly constrained. Current models require a cool to enter state. However, existing geologic evidence suggests had stable, warm, and ice-free before Neoproterozoic Sturtian global glaciation [ca. 717 million years (Ma) ago]. Here, we present eruption ages for three felsic volcanic units interbedded with glaciolacustrine...

10.1126/sciadv.aay6647 article EN cc-by-nc Science Advances 2020-06-10

Large datasets increasingly provide critical insights into crustal and surface processes on Earth.These data come in the form of published contributed observations, which often include associated metadata.Even best-case scenario a carefully curated dataset, it may be nontrivial to extract meaningful analyses from such compilations, choices made with respect filtering, resampling, averaging can affect resulting trends any interpretation(s) thereof.As result, thorough understanding is required...

10.1130/gsatg484a.1 article EN GSA Today 2021-03-24

Abstract The early‐middle Neoproterozoic is thought to have witnessed significant perturbations marine P cycling, in turn facilitating the rise of eukaryote‐dominated primary production. However, with few robust constraints on aqueous concentrations, current understanding cycling generally model‐dependent. To provide new geochemical constraints, we combined microanalytical data sets solid‐state Nuclear Magnetic Resonance, synchrotron‐based X‐ray Absorption Near Edge Structure spectroscopy,...

10.1029/2023gc010974 article EN cc-by Geochemistry Geophysics Geosystems 2023-05-01

Abstract The prevalence of ooids in the stratigraphic record, and their association with shallow‐water carbonate environments, make an important paleoenvironmental indicator. Recent advances theoretical understanding ooid morphology, along empirical studies from Turks Caicos, Great Salt Lake, Bahamas, have demonstrated that morphology is indicative depositional environment hydraulic conditions. To apply this knowledge modern environments to record Earth’s history, researchers measure size...

10.1029/2020jf005601 article EN Journal of Geophysical Research Earth Surface 2021-02-22

Significance Animals that build skeletons have an outsized impact on Earth’s biological, geochemical, and sedimentological cycles. To determine when, where, why metazoan biomineralization first emerged, it is necessary to study the earliest record of skeletal animals. This made up four genera from Ediacaran period: Namacalathus , Cloudina Sinotubulites Namapoikia . Here, we measure three-dimensional reconstructions test hypothesis a calcifying sponge. We find lacks physical characteristics...

10.1073/pnas.2009129117 article EN Proceedings of the National Academy of Sciences 2020-08-03

Abstract The three-dimensional characterization of internal features, via metrics such as orientation, porosity, and connectivity, is important to a wide variety scientific questions. Many spatial morphological only can be measured accurately through direct in situ observations large (i.e., big enough statistically representative) volumes. For samples that lack material contrast between phases, serial grinding imaging—which relies solely on color textural characteristics differentiate...

10.1017/s1431927622012442 article EN cc-by Microscopy and Microanalysis 2022-10-21

Snowball Earth cap carbonate sequences provide an archive of what are likely the most dramatic climate transitions in all history. One approach to gain insight into these events is detailed observation sedimentary structures within post-glacial units. Here, we report on newly discovered radially-symmetric Keilberg Member post-Marinoan ‘cap dolostone’ from Otavi Group northwest Namibia. We describe local expression over 60 decimeter-scale cymbal or disc a single location. interpret features,...

10.31223/x5kk76 preprint EN cc-by EarthArXiv (California Digital Library) 2021-06-01

10.1130/abs/2017am-304971 article EN Abstracts with programs - Geological Society of America 2017-01-01

Table of valid lithologies; map depicting sample locations; crossplot illustrating analytical uncertainty; flowchart the proposed workflow; histograms showing effects progressive filtering, distribution spatial and age scales, proximity probability values; results parameters sensitivity tests.

10.1130/gsat.s.14179976 preprint EN cc-by-nc 2021-03-08
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