2,830 research outputs found
Data for Gupta et al., "Estimating the Meridional Extent of Adiabatic Mixing in the Stratosphere using Age-of-Air", JGR:Atmospheres,
No full textModel data and post-processed data supporting the creation of the manuscript "Estimating the Meridional Extent of Adiabatic Mixing in the Stratosphere using Age-of-Air" submitted to JGR:Atmospheres in August 2022.
1) The netCDF files created through post-processing of full model data in FORTRAN are shared in the /data/ directory. These file contains the zonal mean circulation statistics based on Gupta et al. (2020), age-of-air transport diagnostics based on Linz et al. (2021), and the novel \Gamma-\Theta circulation streamfunction introduced in this study. The /data/ directory also contains MATLAB .mat data files for the transport diagnostics obtained from WACCM. 150 days of actual GFDL-FV3 model data in the northern hemisphere, between 0.1 hPa-500 hPa pressure levels is also provided to support external computations and validation.
2) The Jupyter notebook used for final computation and figures production is provided in .ipynb, .html and .pdf formats in /code/. All the files referred to in the notebook are stored in the /data/ directory.
Corresponding author : Aman Gupta, [email protected], [email protected], [email protected]
Corrigendum: Capital Inflows and House Prices: Aggregate and Regional Evidence from China
No full textIn the paper ‘Capital Inflows and House Prices: Aggregate and Regional Evidence from China’ by H. An, et al., printed in the December 2016 issue, there was a missing acknowledgement section for funding resources.
On page 451, the acknowledgement section should appear after the corresponding information as:
“Correspondence: Rakesh Gupta, Department of Accounting, Finance and Economics, Griffith Business School, Griffith University, Nathan Campus QLD 4111. [email protected]
*This work was financially supported by the Humanities and Social Science Foundation of Ministry of Education of China (16YJA790001).”
The author apologises for this error and any confusion it may have caused.No Full Tex
Can social marketing be a tool towards improved nutrition? Lessons from a field experiment in India
No full textMicronutrient deficiency, iron in particular, is a major health issue across India, affecting maternal and child health. Iron Folic Acid tablets are often distributed to pregnant women to address iron deficiency, however, recent data show a high prevalence of anemia within non-pregnant women too. Fortification powders have been found to improve child and maternal health in developing countries. The purpose of this paper, however, is to evaluate possibility of voluntary purchase of fortification powders by households when marketed by local women self-help groups at a price mutually agreed upon by the community. The paper tracks purchasing behavior of 5600 households across 15 villages in rural India for a period of close to 2 years and finds that the likelihood of a household making purchases increases by 55% because of its connectivity to local self help groups and other social networks, while other factors have no bearing at all
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Essays in development economics
No full textThis dissertation studies questions of economic and policy relevance in the field of development economics. I examine the impact of unconditional cash transfers on vulnerable populations in developing countries, often excluded by standard social safety net programs. I also study the effect of realized fertility on stated fertility preferences, shedding light on the effects of outcomes on preferences in general when measured retrospectively via survey instruments. In Chapter one, I elaborate on the effects of realized fertility on fertility preferences. Fertility preferences are critical in understanding fertility trends and in making reproductive policies. However, if fertility itself influences survey reports of preferences, then its usage in policy making gets complicated. This paper investigates whether there exists a causal effect of realized fertility on desired fertility. I exploit two separate sources of exogenous variation in realized fertility, robustly implementing two distinct identification strategies. The first uses the occurrence of twins while the second uses the birth of a female child at first birth to estimate the impact of realized fertility on desired fertility. Using data from 230 rounds of Demographic and Health Surveys from 74 developing countries, I find that having an additional birth causally increases desired fertility by 0.15-0.30. My main result is to identify this causal effect, but my data also allow me to investigate probable mechanism. I show that facts of timing rule out learning that could be consistent with a classical model of causally-prior preferences. Instead, supplementary evidence suggests a behavioral mechanism whereby outcomes influence stated preferences, which could be through reference-dependent preferences, ex-post rationalization, or another behavioral mechanism. The result has important policy and research implications specifically when using fertility preferences to estimate excess fertility, the need for family planning programs, son preference, or as proxies for intrahousehold bargaining. Chapter two, jointly written with Ana P. Cañedo & Raissa Fabregas, investigates the impact of emergency cash transfers in Mexico. Specifically, we study the effects of a sizeable ($526 PPP) one-time-only emergency cash transfer targeted at self-employed, sub-employed, and informal sector workers during the COVID-19 pandemic. The transfers were processed on a first-come, first-served basis until program funds were depleted, creating a plausible source of exogenous variation in program participation. Combining this discontinuity with a purpose-built phone survey, we find substantial positive effects on measures of food security and psychological well-being three to four months after reception. The point estimates for summary measures of business health outcomes and support for lockdown measures are positive, but imprecisely estimated. Finally, Chapter three, jointly written with Stein et al., we investigate medium term effect of unconditional cash transfers to refugees in Uganda. Refugees in protracted displacement are often limited in their opportunities for income-generating activities and investments, making them dependent on aid for meeting basic needs. In the context of stretched humanitarian aid budgets, it is a necessary policy question to determine ways to increase refugees’ self-reliance. In this study, we combine a quantitative randomized controlled trial with rich longitudinal qualitative data to explore multidimensional impacts of a large, one-time, unconditional transfer of 1,000 USD to predominantly South Sudanese refugees living in protracted displacement in Uganda. An NGO made this transfer at the beginning of the COVID-19 lockdown, which was also a time of cuts to the monthly consumption support delivered by large aid agencies. Estimated after 19 months, we find that the transfer significantly increased households’ consumption, asset values, business ownership, business revenue, psychological well-being and self-reliance. We find positive but insignificant effects on food security, migration, employment, or female empowerment. Although our qualitative work uncovered some evidence of unintended consequences, we do not find systematic negative impacts including social cohesion, security, and domestic conflict. Overall, a large one-time cash transfer given in the context of shocks has multidimensional improvements in refugees’ lives. This suggests large one-off cash transfers for refugees in situations of protracted displacement allows them to make meaningful movements towards self-reliance through improved investments and asset accumulation. However, while large cash transfers should continue to be a key part of the humanitarian policy toolkit, the magnitude and mixed nature of our findings suggests that large one-time cash transfers alone are insufficient to deliver lasting self-reliance to those in protracted displacement, especially in the context of multiple shocks.Economic
An Era of 3D Printing
No full textIt’s better to accomplish a task in few hours rather than in months. The creation of 3D printed homes has brought a revolution in the construction industry. Using giant printers it takes only few hours to construct houses much quicker than the earlier methods which takes at least 3 months, moreover at reasonable cost. So this concept can reduce the burden from the pockets of a common man. Even construction waste is used in printers and then command is given to constructs the house layer by layer. This solves the purpose of recycling the waste and promotes sustainable development. This abstract overviews 3D printed home
First person – Akash Gupta
No full textFirst Person is a series of interviews with the first authors of a selection of papers published in Biology Open, helping early-career researchers promote themselves alongside their papers. Akash Gupta is first author on ‘A novel and cost-effective ex vivo orthotopic model for the study of human breast cancer in mouse mammary gland organ culture’, published in BiO. Akash conducted the research described in this article while a PhD Scholar in Rajendra Mehta's lab at IIT Research Institute, Chicago, USA. He is now an assistant research scientist in the lab of Syreeta L. Tilghman at the University of Arizona, Department of Medicine, Tucson, USA, investigating drug efficacy modeling using human organoids culture for the treatment of cancers
Engineering materials : research, applications and advances / author, K.M. Gupta.
No full text"A CRC title."Includes bibliographical references and index.596 p.
Universal Statistical Properties of Inertial-particle Trajectories in Three-dimensional, Homogeneous, Isotropic, Fluid Turbulence
No full textWe obtain new universal statistical properties of heavy-particle trajectories in three-dimensional, statistically steady, homogeneous, and isotropic turbulent flows by direct numerical simulations. We show that the probability distribution functions (PDFs) P(Φ), of the angle Φ between the Eulerian velocity u and the particle velocity v, at a point and time, scales as P(Φ) ∼Φ−, with a new universal exponent ≃ 4
Mutual-Friction Coefficients in Two-Dimensional Superfluids: From the Gross-Pitaevskii equation to the Hall-Vinen-Bekharevich-Khalatnikov Two-fluid Model
No full textWe start from the two-dimensional Gross-Pitaevskii equation (GPE) and develop algorithms for the ab-initio determination of the temperature (T) dependence of the mutual-friction coefficients, α and α, and the normal-fluid density Pn, which appear as parameters in the Hall-Vinen-Bekharevich-Khalatnikov (HVBK) two-fluid model for a superfluid. In the second part of our study, we elucidate the statistical properties of two-dimensional, homogeneous, isotropic superfluid turbulence in the simplified HVBK model, with values for the mutual-friction coefficients that are comparable to those we obtain from the first part of our study
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