316 research outputs found
Effect of Abiotic Factors on the Incidence of Rust Disease in Acorus calamus L. under Terai Zone of West Bengal, India
No full textCorrigendum: 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
Studies on the Incidence of Rice-Tungro Virus (RTV) and Population Dynamic of its Predominant Vector
No full textCalibrated meudon data
No full textThis repository contains calibrated filament data which is made from Meudon hand drawn archive, which consist hand drawn Carrington maps in image format available at BASS2000: Solar Survey Archive at Observatoire de Paris (available at http://bass2000.obspm.fr/lastsynmap.php). The Meudon archive consisting gray scaled images for Carrington rotation 876-1823 and coloured images for Carrington rotation 1824-2008. After downloading the data from the Meudon archive, we have used a automated method (described in our paper which is accepted for publication in APJ and now available at https://arxiv.org/pdf/2106.04320.pdf) to calibrate these data and then we have used these calibrated data for further studeis of solar filaments. These calibrated data from our automated detection is now we are making public and can be used for any further studies only after citing our paper Mazumder et al 2021. Data of gray scaled images for Carrington rotation 876-1823 is kept at gray_scale_image.zip folder and data for coloured images for Carrington rotation 1824-2008 is kept in colour_mages.zip folder.
@misc{mazumder2021solar, title={Solar Cycle Evolution of Filaments over a Century: Investigations with the Meudon and McIntosh Hand-drawn Archives}, author={Rakesh Mazumder and Subhamoy Chatterjee and Dibyendu Nandy and Dipankar Banerjee}, year={2021}, eprint={2106.04320}, archivePrefix={arXiv}, primaryClass={astro-ph.SR} }
This repository contains calibrated filament data which is made from Meudon hand drawn archive, which consist hand drawn Carrington maps in image format available at BASS2000: Solar Survey Archive at Observatoire de Paris (available at http://bass2000.obspm.fr/lastsynmap.php). The Meudon archive consisting gray scaled images for Carrington rotation 876-1823 and coloured images for Carrington rotation 1824-2008. After downloading the data from the Meudon archive, we have used a automated method (described in our paper in https://arxiv.org/pdf/2106.04320.pdf) to calibrate these data and then we have used these calibrated data for further studeis of solar filaments. These calibrated data from our autamated detection is now we are making public and can be used for any further studies only after citing our paper Mazumder et al 2021.
@misc{mazumder2021solar, title={Solar Cycle Evolution of Filaments over a Century: Investigations with the Meudon and McIntosh Hand-drawn Archives}, author={Rakesh Mazumder and Subhamoy Chatterjee and Dibyendu Nandy and Dipankar Banerjee}, year={2021}, eprint={2106.04320}, archivePrefix={arXiv}, primaryClass={astro-ph.SR} }
Our work is accepted for publication in APJ and now available at https://arxiv.org/pdf/2106.04320.pdf and after it get published the refernce of ApJ will be updated here
Embedding Approximately Low-Dimensional l_2^2 Metrics into l_1
No full textGoemans showed that any n points x_1,..., x_n in d-dimensions satisfying l_2^2 triangle inequalities can be embedded into l_{1}, with worst-case distortion at most sqrt{d}. We consider an extension of this theorem to the case when the points are approximately low-dimensional as opposed to exactly low-dimensional, and prove the following analogous theorem, albeit with average distortion guarantees: There exists an l_{2}^{2}-to-l_{1} embedding with average distortion at most the stable rank, sr(M), of the matrix M consisting of columns {x_i-x_j}_{i<j}. Average distortion embedding suffices for applications such as the SPARSEST CUT problem. Our embedding gives an approximation algorithm for the SPARSEST CUT problem on low threshold-rank graphs, where earlier work was inspired by Lasserre SDP hierarchy, and improves on a previous result of the first and third author [Deshpande and Venkat, in Proc. 17th APPROX, 2014]. Our ideas give a new perspective on l_{2}^{2} metric, an alternate proof of Goemans' theorem, and a simpler proof for average distortion sqrt{d}
Does strict employment protection discourage job creation? Evidence from Croatia
No full textEmployment protection legislation in Croatia is among the most strict in Europe. Firing is difficult and costly, and flexible forms of employment are limited. Is this apparent rigidity reflected-as one would expect based on standard economic theory-in low labor market dynamics? Is job creation low and hiring limited? Is the job security of insiders achieved at the cost of outsiders not being able to enter thelabor market? The author attempts to answer these questions by examining job flows. If the employment protection legislation is binding, then job and worker turnover should be low. He shows that this is indeed the case. Hiring is limited and the average job tenure is very long in Croatia. Job destruction is low, however job creation is still lower. The result is accumulation of unemployment, in large part due to new labor market entrants not being able to find a job. The high degree of job protection also seems to strengthen the bargaining position of insiders and results in relatively high wages. So, wages in Croatia are higher than among its competitors, even after adjusting for productivity. These high labor costs are likely to contribute to limited job creation in existing firms, but also are likely to discourage the entry of-and thus job creation in-new firms. The author presents evidence that firm growth has been indeed limited in Croatia, contributing to the low employment level. The author examines other potential causes of high unemployment in Croatia (the unemployment benefit system, labor taxation, the wage structure, and skill and spatial mismatches). He argues that they do not play a substantial part in accounting for poor labor market outcomes in Croatia. The author concludes that the stringent employment protection legislation is the key labor market institution behind low job creation and high unemployment. Based on this he recommends specific measures aimed at liberalizing the labor market to foster job creation and employment.Labor Management and Relations,Labor Policies,Labor Markets,Environmental Economics&Policies,Trade Finance and Investment,Labor Markets,Labor Management and Relations,Labor Standards,Banks&Banking Reform,Environmental Economics&Policies
Microstructural evolutions, phase transformations and hard magnetic properties in polycrystalline Ce–Co–Fe–Cu alloys Author links open overlay panel
No full textThis work focuses on systematic studies of Ce–Co based 1:5 permanent magnet alloys of CeCo4.4-xFexCu0.6 and CeCo3.9-xFexCu1.2 (x = 0, 0.3, 0.6, 0.9, 1.2, 1.8) by varying Co:Fe. The overarching aim of this manuscript is to elucidate the hard-magnetic properties through a better understanding of phase formation by the structural, microstructural, and magnetic properties in these materials. Improved mutual solubility of Fe in the 1:5 phase has been observed with an extended homogeneity range by Cu substitution. For both composition series, Fe contents of x ≤ 0.6 show a homogeneous microstructure with a single 1:5 phase and good magnetic properties. The composition region 0.6 < x ≤ 0.9 appears to be near the boundary of solubility and evolution of other phases. At x = 1.8, it is found that the homogeneous 1:5 phase and magnetic hardness deteriorated due to the evolution of secondary phases such as 2:17, 2:7, and Fe–Co. The addition of Fe improved both the magnetization and Curie temperature via increased effective exchange interactions, while an increase in Cu content enhanced coercivity.This is a manuscript of an article published as Gandha, Kinjal, Rakesh P. Chaudhary, Matthew J. Kramer, Ryan T. Ott, Durga Paudyal, and I. C. Nlebedim. "Microstructural evolutions, phase transformations and hard magnetic properties in polycrystalline Ce–Co–Fe–Cu alloys." Materials Chemistry and Physics 286 (2022): 126179.
DOI: 10.1016/j.matchemphys.2022.126179.
Copyright 2022 Elsevier B.V.
Posted with permission.
DOE Contract Number(s): AC02-07CH11358
Towards high-bandwidth scanning impedance imaging
No full textThesis: S.M., Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science, 2016.This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.Cataloged from student-submitted PDF version of thesis.Includes bibliographical references (pages 107-109).Contact-less, three-dimensional scanning is a highly important field for the semiconductor industry. By using a system of high-bandwidth impedance sensors and drive electronics, the physical constituents of ICs such as buried/surface dielectrics, buried/surface conductors and PN junctions could be detected. This thesis takes an initial step toward high-bandwidth electroquasistatic (EQS) imaging by exploring the use of high-frequency imaging. When combined with impedance sensors having a high spatial density, it could be possible to develop a very-high-bandwidth scanning imaging system. The system explored here uses a capacitively-coupled electrode array in order to distinguish various features such as a dielectric layer or a variable air gap based on measured electrode impedance. The frequency at which the impedance is measured is near 500 MHz. Also, this system can be potentially used to image depth information and dielectric composition by using multi-wavelength electrode arrays. This thesis presents the selection and layout for the high-speed drive electronics and the construction and modeling of the driven electrode arrays. Validation experiments to illustrate capacitive sensing ability are also performed. The system is able to identify surface topography, distinguish surface dielectrics from metals, and discern changes in bulk conductivity.by Rakesh Kumar.S.M
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