330,414 research outputs found
Diaphorina venata Mathur 1975
No full textDiaphorina venata Mathur, 1975 Distribution. India: Tamil Nadu (Mathur 1975). Host plant. Adults were collected on Santalum album (Santalaceae). There is no evidence for or against S. album being a host (Burckhardt et al. 2017).Published as part of Burckhardt, Daniel, Sharma, Anamika & Raman, Anantanarayanan, 2018, Checklist and comments on the jumping plant-lice (Hemiptera: Psylloidea) from the Indian subcontinent, pp. 1-38 in Zootaxa 4457 (1) on pages 11-12, DOI: 10.11646/zootaxa.4457.1.1, http://zenodo.org/record/145753
Geometry of D1-D5-P bound states
No full textSupersymmetric solutions of 6-d supergravity (with two translation symmetries) can be written as a hyperkahler base times a 2-D fiber. The subset of these solutions which correspond to true bound states of D1-D5-P charges give microstates of the 3-charge extremal black hole. To understand the characteristics shared by the bound states we decompose known bound state geometries into base-fiber form. The axial symmetry of the solutions make the base Gibbons-Hawking. We find the base to be actually `pseudo-hyperkahler': The signature changes from (4,0) to (0,4) across a hypersurface. 2-charge D1-D5 geometries are characterized by a `central curve' ; the analogue for 3-charge appears to be a hypersurface that for our metrics is an orbifold of
Absolute and Conditional Convergence: Its Speed for Selected Countries for 1961--2001
No full textThe study gives the theoretical justification for the per capita growth equations using Solovian model(1956) and its factor accumulation assumptions. The different forms of the per capita growth equation is used to test for 'absolute convergence' and 'conditional convergence' hypotheses and also work out the speed of absolute and conditional convergence for selected countries from 1961-2001.Only EU and East Asian countries together have shown uniform evidence of absolute convergence in all periods. While EU as a region has shown significant evidence of absolute convergence in two periods, 1961-2001 and 1970-2001, there is no convincing statistical evidence in favor of absolute convergence in the last two periods: 1980-2001 and 1990-2001. The speed of absolute convergence in the four periods range between 0.99-2.56 % p.a. (2% for the EU was worked out by Barro and Xavier Sala-i-Martin, 1995, for European regions) for EU while it ranges between 0.57-1.16 % p.a. for the countries in East Asia and EU regions together. However, there is no evidence of convergence among the South Asian countries in all periods and some major CIS republics since 1966.There is however tendency for absolute convergence among countries of South Asia, East Asia and European Union together particularly after the 1980s. Conditional convergence is prevalent among almost all pairs of regions in our sample except East Asian and South Asian nations together. Speed of conditional convergence ranges from 0.2 % in an year to 22%.In the European nations, the speed of conditional convergence works out be nearly 20 % unlike the speed of absolute convergence which hovered around 2 %.Such results would mean that countries in Europe are converging very quickly to their own potential level of incomes per capita but not so quickly to a common potential level of income per capita.Growth equation; absolute convergence; conditional convergence; speed of absolute and conditional convergence; elasticity of output with respect to capital; half life of convergence
Finland-India Business Prospects 2007-2017
No full textFinland-India Economic Relations were researched for the first time in a study that analysed mutual trade and investment potential through the lens of revealed comparative advantage and identified profitably tradable goods at 4-digit and 8-digit disaggregated levels in the standard international trade classification (Mathur, 1998). This study was made freely available on the world wide web for five years through http:// www.uta.fi/kati as part of longitudinal action research to study how small and large players would take advantage of this freebie. This paper provides initial results of a sequel study initiated in 2005 to understand what happened thereafter, whether trade grew, and to analyse how trade could diversify from identification of new opportunities for product-services linkages after the expiry of the transitional period that brought GATS into effect in 2005. Finlands share in Indian imports and exports has grown rapidly and exponentially and the prospects are vast but the potential realised by 2007 remains considerably untapped and far below comparable figures for other EU countries. This study emphasises the need for policy research on institutional barriers to design new gateways beyond an increased frequency of contact between people from the two countries. The conclusion that robust bridges could be built through tripartite fora comprising business, government and academia points to the need for new institutionalities and deepening research studies, some of which initiated as part of the Finland-India Economic Relations project, are at various stages of progress and expected to be completed during 2007-2010.
Data for "First-principles-based Machine Learning Models for Phase Behavior and Transport Properties of CO2"
No full textThis dataset contains example input files, training data sets and potential files related to the publication "First-principles-based Machine Learning Models for Phase Behavior and Transport Properties of CO2." by Mathur et al (2023). In this work, we developed machine learning models for CO2 based on different exchange-correlation DFT functionals. We assessed their performance on liquid densities, vapor-liquid equilibrium and transport properties.DPMDCO2readme.txt
DPMD-CO2-dataspace.tar.g
Unwinding of strings thrown into a fuzzball
No full textThe traditional black hole has a horizon, with a singularity inside the horizon. But actual microstates of black holes are ‘fuzzballs’, with no horizon and a complex internal structure. We take the simplest hole in string theory — the extremal 2-charge D1D5 hole — and study a simple effect that is a consequence of this internal structure of the fuzzball. Suppose we have a NS1 string wrapping the compact circle of the fuzzball solution. In the traditional black hole solution this circle is directly tensored with the remaining directions, and does not shrink to zero size. Thus a part of the string can fall behind the horizon, but not ‘unwind’. In the fuzzball geometry, this circle makes a nontrivial geometric structure — the KK monople — by mixing with the other directions, and thus shrinks to zero at the core of the monopole. Thus the string can ‘unwind’ in the fuzzball geometry, and the winding charge is then manifested by a nontrivial field strength living on the microstate solution. We compute this field strength for a generic microstate, and comment briefly on the physics suggested by the unwinding process
Fuzzball geometries and higher derivative corrections for extremal holes
No full text2-charge D1-D5 microstates are described by geometries which end in `caps' near r=0; these caps reflect infalling quanta back in finite time. We estimate the travel time for 3-charge geometries in 4-D, and find agreement with the dual CFT. This agreement supports a picture of `caps' for 3-charge geometries. We argue that higher derivative corrections to such geometries arise from string winding modes. We then observe that the `capped' geometries have no noncontractible circles, so these corrections remain bounded everywhere and cannot create a horizon or singularity
Dual geometries for a set of 3-charge microstates
No full textWe construct a set of extremal D1-D5-P solutions, by taking appropriate limits in a known family of nonextremal 3-charge solutions. The extremal geometries turn out to be completely smooth, with no horizon and no singularity. The solutions have the right charges to be the duals of a family of CFT microstates which are obtained by spectral flow from the NS vacuum
Opportunities for India and Bangladesh
No full textIt is widely agreed that, over the past decade, accelerating infrastructure investments in India's North Eastern Region (NER) and neighboring countries, along with connectivity agreements with Bangladesh, hold immense promise for unlocking NER's economic potential. Other global trends, such as the growing incomes and consumer awareness in India and neighboring countries; a rising preference for fresh, healthy, safe, environmentally friendly, and socially responsible products; the growing role of services in manufacturing; and increasing demand for skilled resources are also very favorable for NER. Together, these developments can help NER showcase its strengths in agriculture and services, thereby developing value chains in these sectors, which will lead to sustainable, better-paying, job opportunities for the people of NER.
In this context, the World Bank, in consultation with stakeholders--government, private sector, and academia--analyzed two cross-cutting constraints that are encountered across all value chains and sectors in NER: connectivity and logistics, and product standards and quality infrastructure. These are discussed in Playing to Strengths: A Policy Framework for Mainstreaming Northeast India (Kathuria, S., and P. Mathur, eds., 2019, World Bank). This volume is a companion piece to that report; it analyzes four value chains--fruits and vegetables, spices, bamboo and related products, and medical tourism--and provides an assessment of how Bangladesh can benefit from NER’s increasing connectivity and growth prospects. The sector studies emphasize the need to reorient the supply base in NER toward serving the changing global demand and puts an explicit focus on women as well as the bottom 40 percent of the workforce. In light of the mutual benefit offered by economic exchange, improvements in connectivity offer a win-win opportunity for NER and Bangladesh
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