2,854 research outputs found
Sparsity based defense against adversarial examples: v1.0
No full textSparsity-based defense against adversarial attacks on machine learning classifiers. Contains code for the following papers:
S. Gopalakrishnan, Z. Marzi, U. Madhow, R. Pedarsani, "Robust Adversarial Learning via Sparsifying Front Ends", arXiv:1810.10625.
Z. Marzi*, S. Gopalakrishnan*, U. Madhow, R. Pedarsani, "Sparsity-based Defense against Adversarial Attacks on Linear Classifiers", in IEEE International Symposium on Information Theory (ISIT), June 2018.
S. Gopalakrishnan*, Z. Marzi*, U. Madhow, R. Pedarsani, "Combating Adversarial Attacks Using Sparse Representations", in ICLR Workshop, April 2018
A report on occurrence of Phlebotomine sand flies (Diptera: Psychodidae) and two new country records from Andaman & Nicobar Islands, a Union territory of India
No full textJambulingam, P., Srinivasan, R., Gopalakrishnan, S. (2022): A report on occurrence of Phlebotomine sand flies (Diptera: Psychodidae) and two new country records from Andaman & Nicobar Islands, a Union territory of India. Zootaxa 5093 (2): 241-246, DOI: 10.11646/zootaxa.5093.2.
Right to information and freedom of expression
Get PDFDescribes the important initiatives in Freedom of Expression in selected countries and Library Associations like IFLA and ILA. Indian initiaves in this direction aslo described and the need of strong involvement from Library associations and library professionals in India, is also spotlighted
Exploration of Plant Growth-Promoting Actinomycetes for Biofortification of Mineral Nutrients
Get PDFMineral malnutrition, especially Fe and Zn, affects more than two million people around the world and increases vulnerability to illness and infections. These malnourished people live in developing countries and rely upon staple foods routinely with inability to either afford for dietary diversification or pharmaceutical supplementation or industrial fortification of minerals. Biofortification is a strategy that can tackle hidden hunger merely through staple foods that people eat every day. This strategy can be achieved through agronomic practices and conventional breeding and genetic engineering approaches, and each has their own pros and cons. The sustainability of such grain fortification with higher seed mineral concentration is soil health dependent, especially on the availability of mineral in the rhizosphere. Microorganisms, the invisible engineers in improving the soil health by solubilizing trace elements and by driving various biogeochemical cycles of soil, have the ability to serve as a key solution for this complex issue. In specific, plant growth-promoting (PGP) microbes reside in root-soil interface and employ the use of siderophores, organic acids, and exopolysaccharides for increasing the mineral availability and subsequent mobilization to the plants. Increasing the seed mineral density with the use of such PGP microbes, especially actinomycetes, is in its infancy. Hence, this chapter is aimed to bring a view on the role of microbes, especially actinomycetes, with metal-mobilizing and PGP traits for biofortification as this strategy may act as a complementary sustainable tool for the existing biofortification strategies
Plant Growth Promoting Actinobacteria : A New Avenue for Enhancing the Productivity and Soil Fertility of Grain Legumes
Get PDFGlobal yields of legumes have been relatively stagnant for the last five decades, despite the adoption of conventional and molecular breeding approaches. The use of plant growth-promoting (PGP) bacteria for improving agricultural production, soil and plant health has become one of the most attractive strategies for developing sustainable agriculture. Actinomycetes are bacteria that play an important role in PGP and plant protection, produce secondary metabolites of commercial interest, and their use is well documented in wheat, rice, beans, chickpeas and peas. In order to promote legumes, the general assembly of the UN recently declared 2016 the “International Year of Pulses.” In view of this development, this book illustrates how PGP actinomycetes can improve grain yield and soil fertility, improve control of insect pests and phytopathogens, and enhance host-plant resistance. It also addresses special topics of current interest, e.g. the role of PGP actinomycetes in the biofortification of legume seeds and bioremediation of heavy metals
Evaluation of Plant Growth-Promoting Actinomycetes on Vigna
Get PDFThe legume genus Vigna are grown in warm temperate and tropical regions globally but are particularly crucial to human nutrition in large parts of tropical Africa and Asia. It can also serve as forage crops. Among the Vigna species, the Asian Vigna has received little research initiatives than African Vigna such as cowpea and mung bean. From the last decade, the research initiatives are getting increased for both the Vigna species in the context of genetic resource analysis and genome mapping. The production status has remained stagnant in many countries due to long list of pest and pathogen attacks and abiotic stresses. Use of plant growth-promoting microbes for improving the productivity of Vigna species is still in its infancy, and there were very few field evaluation studies conducted. This chapter brings an overview of several reports which documented the various facets of plant growth-promoting microbes, particularly of actinomycetes, in increasing growth performance and productivity of Vigna
Strategic Coopetition of Global Brands: A Game Theory Approach to ‘Nike + iPod Sport Kit’ Co-branding
Get PDFCo-branding can be implemented by establishing an agreement of strategic coopetition that allows companies to compete and cooperate simultaneously in order to obtain competitive advantages through operational synergy. With this type of agreement, brands enter markets sharing loyal customers they would be unlikely to reach individually. The main advantages associated with implementation of this form of strategic coopetition are the possibility of jointly communicating brand image, reputation and credibility in a global market where consumers tend to have homogeneous preferences and convergent lifestyles. The strategic coopetition between two global brands, Apple and Nike, through development of the ‘Nike+iPod Sport Kit’ product, serves as a benchmark to illustrate the benefits associated with implementation of coopetitive cooperation agreements. From application of the game theory, simulation of a game of strategic coopetition provided results that confirm global brands obtain benefits, albeit not in equal measure, in terms of adding value to the brand image at a world level.Co-branding; Coopetition; Global brands; Growth of brand value.
FIGURE 3 in A new species of the genus Downsiomyia Vargas (Diptera: Culicidae) from Himachal Pradesh, India
No full textFIGURE 3. Phylogenetic tree of mitochondrial COI sequences for species of Downsiomyia. The GenBank accession number and the country of origin are included for each specimen included in the analysis.Published as part of Natarajan, R., Gopalakrishnan, S., Kumar, Pradeep & Kumar, Ashwani, 2022, A new species of the genus Downsiomyia Vargas (Diptera: Culicidae) from Himachal Pradesh, India, pp. 575-584 in Zootaxa 5205 (6) on page 579, DOI: 10.11646/zootaxa.5205.6.5, http://zenodo.org/record/731878
FIGURE 2 in A new species of the genus Downsiomyia Vargas (Diptera: Culicidae) from Himachal Pradesh, India
No full textFIGURE 2. Downsiomyia rajaveli sp. nov. Pupal exuviae: A, Cephalothorax; B, abdominal segments. Fourth-instar larval exuviae: C, Head; D, siphon; E, comb scales. Cs, comb scale; CT, cephalothorax; H, head; S, siphon.Published as part of Natarajan, R., Gopalakrishnan, S., Kumar, Pradeep & Kumar, Ashwani, 2022, A new species of the genus Downsiomyia Vargas (Diptera: Culicidae) from Himachal Pradesh, India, pp. 575-584 in Zootaxa 5205 (6) on page 578, DOI: 10.11646/zootaxa.5205.6.5, http://zenodo.org/record/731878
Differential diffusive instabilities of miscible two-layer stratifications in porous media and Hele-Shaw cells
No full textIn porous media, a stratification of a given solution on top of another miscible solution can be buoyantly unstable because of an unstable density stratification or because of differential diffusive effects. The former is the well known Rayleigh–Taylor (RT) mechanism wherein the interface is destabilized by the denser solution overlying a less dense one in the gravity field. Whereas the latter is of particular interest in the field of oceanography, when the upper solution is less dense than the lower one with the lower component diffusing faster than the upper one, resulting in a double diffusive (DD) instability. Similarly, a diffusive-layer convection (DLC) instability has also been observed for a stable density stratification with the upper solute diffusing faster than the lower one. Though the literature on differential diffusion effects is pretty vast, very few studies have managed to establish a connection, both qualitatively and quantitatively, between numerical simulations and experimental observations, which is the basis of the present study. We report our findings in a broad parameter range where the instability mechanism could be triggered by an unstable density stratification or due to differential diffusive effects, or even both, resulting in mixed modes
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