125 research outputs found
wfschneidergroup/SI-mehta-plasma-N2-vibrations: Initialize
No full text<p>Initialize zenodo</p>
wfschneidergroup/mehta-M-O-boundary: SI
No full text<p>SI files for "Adsorption Energy Correlations at the Metal Support Boundary"</p>
Computer vision for automated surface evaluation of concrete bridge decks
No full textStructural health monitoring of concrete bridges requires accurate and efficient surface crack detection. Early detection of cracks helps prevent further damage. Safety inspection tests are conducted at regular intervals to assess deterioration. Traditional methods involve detection of cracks by human visual inspection. These methods are costly, inefficient and labor intensive, especially for long-span bridges. This thesis presents the use of computer vision and pattern recognition techniques in assessment of cracks on a concrete bridge surface. Bridge deck images are first collected using high-resolution cameras mounted on a robot. Statistical inference algorithms are then implemented to build an automated crack detection system. The proposed machine learning method reduces manual effort and enables automatic labeling over large bridge deck areas to quantify size and location for future reference or comparisons. A panoramic camera is used for the purpose of context localization. Additionally, we demonstrate image-stitching to obtain a coherent spatial mosaic of the bridge deck.M.S.Includes bibliographical referencesby Prateek Prasann
wfschneidergroup/SI-mehta-plasma-N2-vibrations: v0.4
No full text<p>supporting dataset for our paper</p>
wfschneidergroup/SI-mehta-beyond-eq: Version 1
No full textSupplementary Dataset: Plasma-Catalytic Ammonia Synthesis Yields Beyond the Equilibrium Limi
The effect of lime juice on Vibrio parahaemolyticus and Salmonella enterica inactivation during the preparation of raw fish dish ceviche
No full textCeviche is a Peruvian raw fish dish. It is extremely popular in the South American countries and has recently gained prominence in USA. It can be made with many types of seafood but is most commonly in USA with tilapia. The most characteristic feature of ceviche is the use of lime juice for marinating the raw fish. No ingredient of the dish is cooked in the conventional sense of applying heat. There have been confirmed cases of cholera in Peru, New Jersey and Florida, associated with ceviche. Since lime juice is sole means of controlling risk in ceviche recipes across the world, it is important to study its anti-bacterial effects. Even though the literature is very rich in the use of organic acids as anti-bacterial agents, little data exists for their effect in seafood systems. The objective of the study was to study the anti-bacterial effects of lime juice marination in ceviche as it would be prepared in restaurants or homes. Target pathogens were Vibrio parahaemolyticus and Salmonella enetrica. Samples were incubated at room temperature (25°C) and refrigeration temperature (4°C) for time intervals up to 150 minutes. In experiments with Salmonella at room temperature, a mean log reduction of 0.8 was observed while at refrigeration temperature a mean log reduction of 2.1 was observed. Reduction in Vibrio parahaemolyticus could only be estimated based on starting levels and detection limits as the plate counts were always below the detection limit for all the times studied (10-150 minutes), both at room and refrigeration temperatures. In experiments at room temperature, log reductions varied from >4.5 to >5.2 while at refrigeration temperature, log reductions varied from >3.5 to >4.3. In experiments testing the inhibitory effect of lime juice, without the fish matrix, more than 5 log reductions in counts was observed on both bacteria. We conclude that preparing ceviche reduces Vibrio parahaemolyticus risk significantly but is less effective for control of Salmonella enetrica.M.S.Includes bibliographical referencesby Prateek Mathu
Identity and Diaspora : Practices of Migration, Religion, Ethnicity & Culture in South Asia.
No full textBy Prateek Srivastava, International Affairs, Journalism
Advisor: Megan Lamkin
Presentation ID: Room417_2
Abstract: Identity and Diaspora discuss about five different ethnic crisis and violence in Asia. These communities and cases are not only lesser known but also are examples of grave violence, discrimination, and migrations. These cases deal with identity such as race, religion, color and gender and how these identities have triggered certain violence and policies within Asia. The author emphasizes understanding different aspects, like religious and racial animosity, constitutional negligence and strategic violence, ethnic discrimination, among these cases. In five chapters, the author discusses the case of Burmese Indians, Muslims in Sri Lanka, Nepalese in Bhutan, Indophobia, Assam-Bengali crisis. In this accessible and student-friendly book, author Prateek Srivastava focuses on discussing certain aspects of migration and identity crises, which happened on a low scale or were lesser known. The author also discusses the policies followed by these countries/governments and how international communities and policymakers can prepare for any such kind of crisis or event that may happen in future. These cases are described after extensive research and can act as a framework to understand the perspectives of countries, governments, and regimes for any future practice of such kinds
wfschneidergroup/SI-mehta-plasma-N2-vibrations: Supporting Data
No full text<p>Supporting dataset for our publication "Overcoming Ammonia Synthesis Scaling Relations with Plasma-enabled Catalysis", Nature Catalysis, 2018, <a href="https://www.nature.com/articles/s41929-018-0045-1">https://www.nature.com/articles/s41929-018-0045-1</a></p>
On the use of two-point velocity correlation in wall-pressure models for turbulent flow past a trailing edge under adverse pressure gradient
No full textTwo-point velocity statistics near the trailing edge of a controlled diffusion airfoil are obtained, both experimentally and analytically, by decomposing Poisson's equation for pressure into the mean-shear (MS) and turbulence-turbulence (TT) interaction terms. The study focuses on the modeling of each interaction term, in order to allow for the reconstruction of the wall-pressure spectra from tomographic velocimetry data, without numerically solving for pressure. The two-point correlation of the wall-normal velocity that describes the magnitude of the MS source term is found to be influenced by various competing factors such as blocking, mean-shear, and the adverse mean pressure gradient. The blocking term is found to supersede the other interaction terms close to the wall, making the two-point velocity correlation self-similar. The most dominant TT term that contributes to far-field noise for an observer located perpendicular to the airfoil chord at the mid-span is shown to be the one that quantifies the variation of the wall-normal velocity fluctuations in the longitudinal direction because of the statistical homogeneity of turbulence in planes parallel to the wall. A model to determine the contribution of the TT interaction term is proposed where the fourth-order two-point correlation can be modeled using Lighthill's approximation. However, its contribution toward wall-pressure spectra is found to be substantially lower than the MS term in the present case. Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.Wind Energ
Estimation of the global carbon fluxes due to agricultural management activities using a land surface model (ISAM)
No full textAgricultural activities contribute to global greenhouse gas (GHG) emissions and climate. The worldwide hike in the food demand due to the rapidly growing population over time has intensified agricultural activities, resulting in a significant amount of GHG emissions (e.g., CO2, CH4, and N2O). Previous global studies have focused on non-CO2 emissions (i.e., CH4, N2O) and ignored the CO2 emissions from the agriculture sector. This study uses a land surface model with spatially heterogeneous representations of agricultural land management practices to estimate the carbon dynamics induced by agricultural land management practices (i.e., planting crops, fertilization, irrigation, harvesting, and grazing) and land-use change (i.e., agricultural land expansion). The estimated global net carbon emission from agriculture and its related land-use change is 2.26 Pg C/yr (net source) in ca. 2010. The land management activities released 0.85 Pg C/yr (38%), and the land-use change activities emitted 1.41 Pg C/yr (62%). Cropland and grazing land released about 72% and 28% of the total agriculture emissions. Maize, rice, and wheat are the greatest contributing crops. South America (22%), North America (19%) and, South and Southeast Asia (13%) are the leading emitting regions. By quantifying the carbon emissions induced by different agricultural management practices, this study help in improving the representations of land management practices in the climate models.Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2022-12-01The student, Prateek Sharma, accepted the attached license on 2020-12-08 at 15:40.The student, Prateek Sharma, submitted this Thesis for approval on 2020-12-08 at 15:58.This Thesis was approved for publication on 2020-12-09 at 17:00.DSpace SAF Submission Ingestion Package generated from Vireo submission #16090 on 2021-03-04 at 16:33:52Made available in DSpace on 2021-03-05T21:47:35Z (GMT). No. of bitstreams: 2
SHARMA-THESIS-2020.pdf: 2056440 bytes, checksum: d705a1b73fb26c011a36348d91590812 (MD5)
LICENSE.txt: 4211 bytes, checksum: 467ba91beeeb4e27780330ec3fc69806 (MD5)
Previous issue date: 2020-12-09Embargo set by: Seth Robbins for item 117344
Lift date: 2023-03-05T21:47:41Z
Reason: Author requested closed access (OA after 2yrs) in Vireo ETD systemAuthor requested closed access (OA after 2yrs) in Vireo ETD systemLimite
- …
