2,840 research outputs found
sj-docx-1-pie-10.1177_09544089231190230 - Supplemental material for Mechanical and dry sliding wear performance evaluation of marble dust particulates–lapinus fiber–polyamide 66 polymer composites with ranking analysis using hybrid AHP-R method
No full textSupplemental material, sj-docx-1-pie-10.1177_09544089231190230 for Mechanical and dry sliding wear performance evaluation of marble dust particulates–lapinus fiber–polyamide 66 polymer composites with ranking analysis using hybrid AHP-R method by Ravi Prakash Sharma, Mukesh Kumar and Ashiwani Kumar in Proceedings of the Institution of Mechanical Engineers, Part E: Journal of Process Mechanical Engineering</p
Light-matter interactions with Flying Doughnuts
No full textThe field of toroidal electrodynamics has gained attention following the detection of toroidal dipole excitations in metamaterials in 2010. Distinct from electric and magnetic dipoles, a toroidal dipole is a localised electromagnetic excitation that corresponds to currents flowing on the surface of a torus. The electromagnetic radiation from toroidal dipole excitations can destructively interfere with the radiation from other modes of excitation, providing a new mechanism of induced transparency and scattering suppression. Toroidal electrodynamics expands with the observation of toroidal light pulses, also known as Flying Doughnuts (FD), which propagate in free space at the speed of light. FDs are solutions to Maxwell’s equations introduced by Hellwarth and Nouchi in 1996, which possess toroidal topology and exist only as short bursts of electromagnetic energy. However, it is little known about how these toroidal pulses interact with matter. This thesis reports on the interaction of toroidal light pulses with matter, focusing on toroidal excitations and non-radiating modes.I have numerically demonstrated supertoroidal anapoles, which are non-radiating charge current configurations that involve supertoroidal currents. Supertoroidal currents are fractal current configurations where each iteration replaces the previous one with a toroidal current loop, accompanied by a toroidal solenoidal current forming the smallest loop. Unlike conventional anapoles formed by the destructive interference of electric and toroidal dipoles, supertoroidal anapoles consist of the interference of a toroidal dipole, the first-order mean square radius of the toroidal dipole, and an electric dipole. I also observed (numerically) the higher-order anapoles formed from quadrupoles and octupoles of electric and toroidal type. I show numerically that under illumination with an FD pulse, scattering from a dielectric torus is substantially suppressed by supertoroidal anapoles by more than 72%. Further, I studied supertoroidal anapoles’dependence on the torus’s geometric parameters. I discovered that a dielectric torus with the largest major radius R and the smallest minor radius r is the best strategy to support supertoroidal anapoles, where R ≫ r and R+r < λ. Moreover, I show that, in contrast to plane wave illumination, FD illumination suppresses scattering by an order of magnitude due to supertoroidal anapoles.I demonstrated that by carefully tuning the geometric parameters of a dielectric disc, it is possible to engineer anapole modes (scattering suppression) over a broad bandwidth of 315nm within the wavelength range from 665nm to 980nm with the maximum suppression at 780nm, when transverse magnetic (TM) FD is an illuminating source and a disc-shaped particle is the scatterer. Further, I show that the disc radius defines the anapole excitation wavelength, and the disc height defines the bandwidth of the anapole; the taller the disc (h < λ), the broader the anapole. Additionally, I show the electric and toroidal dipoles and the anapole mode in the transient regime. I also demonstrate that even though the duration of the incident pulse is ≈ 4 fs, the excitations take up to 15 fs to dissipate their energy through electromagnetic radiation. Further, I investigated the effect of material loss on scattering suppression and observed broadly similar behaviour to lossless material, supporting broad and strong anapole modes. Moreover, unlike plane wave illumination, I report that FD illumination suppresses scattering by an order of magnitude due to the conventional anapole modes.I also investigated the interaction of FD with films and curved interfaces. I demonstrated that the reflection of transverse electric (TE) FD on dielectric film and plasmonic films is 20% and 15% stronger, respectively, compared to TM FD illumination. Moreover, the multipole expansion of displacement current within a high-index dispersive film reveals that the scattering is mediated by the combination of electric and toroidal dipoles (however, their contributions cannot be distinguished with the exact multipole expressions). Investigating FD interactions with curved interfaces shows that the radial spectra distribution of FD does not change upon reflection from the curved interface, which ensures that FD survives after interacting with a curved interface. The findings of FD interactions with curved interfaces are crucial for the experimental realisation of FD-matter interaction, as such experiments involve curved optical components such as parabolic mirrors for the tight focusing of FD.The findings outlined in this thesis contribute to the expanding field of toroidal electrodynamics, firmly establishing its potential for diverse applications, including sensing and spectroscopy using toroidal light sources, anapole nanolasers, anapole-assisted absorption engineering applications, and beyond
Oziotelphusa ravi Raj & Kumar & Ng 2017, new species
No full textOziotelphusa ravi, new species (Figs. 1–5, 6A, 7A, B, 8A, B, 9A, B) Material examined. Holotype: male (41.5 × 30.4 mm) (ZSI), in ditches and rice field near Nagercoil, Kanyakumari district, Tamil Nadu, 8°18’51.792”N, 77°25’20.111”E, coll. R. Ravineesh & R. S. Albert, 22 March 2017. Paratypes: 1 male (45.4 × 33.5 mm), 2 females (45.0 × 34.0 mm, 44.5 × 32.8 mm) (ZRC 2017.158), 2 females (54.3 × 42.8 mm, 49.6 × 35.7 mm) (DABFUK), same data as holotype. Comparative material. Oziotelphusa biloba Bahir & Yeo, 2005: holotype male (41.8 × 29.8 mm) (ZRC 2003.0246), Kodagara Village on Trissur-Chalakudy road, Kerala, India, 10°21’30.7"N, 076°08’45.0"E, 6 m, coll. 2005. Oziotelphusa kerala Bahir & Yeo, 2005: holotype male (38.3 × 27.8 mm) (ZRC 2003.0244), Kolaththuppuzha-Tenmalai Road, Kerala, India, 08°54’12.7”N, 077°32’7.2”E, 120 m, coll. 2005. Diagnosis. Carapace dorsal surface strongly convex (Figs. 1A, 2E, F, 3A, B, 5A, 6A); cristate margins of median tooth of posterior margin of epistome fused distally, forming distinct bilobed tip in anterior view, more prominent in males (Fig. 3C, 7A, 8A, B); frontal margin straight in dorsal view; epibranchial tooth small, above lateral edge of postorbital crista, level with supraorbital margin (Figs. 1A, 2E, F, 3A, B, 5A, 6A); postorbital region moderately narrow, concave (Figs. 1A, 3A, B, 5A, 6A, 7A); postorbital cristae entire, sharp, gently sinuous (Figs. 3B); branchial region highly inflated (Figs. 1A, 3A, B, 5A, 6A, 7A); frontal median triangle as broad as frontal margin, dorsal margin not fused with lateral margins (Figs. 3C, 7A). Suture between anterior thoracic sternites 2 and 3 visible as a deep, narrow groove barely reaching lateral margins; suture between sternites 3 and 4 distinct as a moderately broad, deep groove reaching lateral borders as barely discernible depression (Figs. 3D, 7B). Male pleon broadly triangular, somite 6 narrowly trapezoidal, slightly wider than long with concave lateral margins (Fig. 3D, E). G1 terminal segment ca. 0.3 × length of subterminal segment, sharply bent outwards at angle of about 45° (along longitudinal axis), conical, tapering gradually to truncate tip, proximal part of outer margin of subterminal segment with prominent deep concavity (Figs. 3G, 4A–E). G2 ca. 1.2 times length of G1, distal segment ca. 0.5 × length of basal segment (Fig. 4F, G). Description of male. Carapace broader than long; dorsal surface strongly convex (Figs. 1A, 2E, F, 3A, B, 6A, 7A; frontal margin straight in dorsal view, frontal median triangle as broad as frontal margin, dorsal margin not fused with lateral margins (Figs. 1A, 2E, F, 3A–C, 6A, 7A); suborbital regions rugose, glabrous; pterygostomial region smooth, glabrous (Fig. 3C, 7A); epigastric cristae distinct, slightly anterior of postorbital cristae; epigastric groove Y-shaped (Fig. 3B); cervical groove deep, narrow; H-shaped groove distinct; external orbital tooth prominent, broadly triangular, tip almost in line with frontal margin, clearly demarcated from epibranchial teeth by a V-shaped notch, outer margin concave, inner margin gently curved, joins supraorbital margin; epibranchial tooth distinct, small, blunt, above lateral edge of postorbital crista, level with supraorbital margin; anterolateral margin strongly convex, smooth (Figs. 1A, 2E, F, 3A, B, 6A). Subhepatic region rugose (Fig. 3C, 7A). Postorbital region moderately narrow, concave; postorbital cristae entire, sharp, gently sinuous; anterior part of branchial regions distinctly inflated (Fig. 7B). Posterolateral margin gently concave, joins straight posterior carapace margin (Figs. 1A, 2E, F, 3A, B, 6A); orbits relatively rounded, infra- and supraorbital margins with short setae; eyes filling up most of orbital space; eye stalk moderately long, stout; cornea moderately large, pigmented (Figs. 3C, 7A). Supraorbital margin gently concave at edges (Figs. 3C, 7A). Suborbital margin concave, complete, lined with very low, rounded granules (Figs. 3C, 7A). Antennae long, reaching cornea of eyes; antennules long folded in narrow fossae (Figs. 3C, 7A). Posterior margin of epistome with median tooth, lateral cristate margins of tooth fused at tip to form distinct bilobed structure with distinct median notch when viewed frontally, bifurcation extending towards posterior surface of tooth as 2 cristae (Figs. 3C, 7A, 8A, B). Third maxillipeds covering most of buccal cavity when closed; ischium subrectangular, surface pitted, with distinct submedian oblique groove; merus subovate; exopod relatively slender, reaching lower third of merus, with distinct long flagellum reaching almost entire width of merus (Fig. 3F). Chelipeds asymmetrical (Figs. 1, 3A, H, I, 6A); dorsal, ventral and lateral margins of merus lined with low granules, appears weakly serrated. Outer surface of carpus rugose; inner distal angle with prominent sharp tooth (Figs. 1A, 3A, 6A). Major chela stouter than minor chela (Fig. 3I); cutting edges of both fingers with variously sized teeth, median tooth largest; fingers of minor chela similar to that of major chela but palm more slender, other teeth on cutting edges relatively smaller (Fig. 3H). Ambulatory legs slender; second pair longest, last pair shortest (Figs. 3A, 6A). Outer surface of merus slightly rugose, dorsal margin weakly serrated to entire without obvious subdistal spine; outer surface of carpus with submedian cristae on first to third legs, that on fourth leg almost smooth; lateral margins of dactylus with short, sharp chitinous spines (Figs. 3A, 6A). Suture between thoracic sternites 2 and 3 distinct, barely reaching lateral margins; suture between thoracic sternites 3 and 4 deep, lateral parts very shallow, barely discernible (Figs. 3D, G, 7B). Sutures between sternites 4/ 5, 5/6, 6/7 medially interrupted; suture between sternites 7/8 complete (Fig. 3D). Pleonal locking mechanism with prominent but low, anteriorly directed tubercle on submedian part of sternite 5 (Fig. 3D). Sternopleonal cavity deep, reaching imaginary line connecting submedian part of coxae of chelipeds (Figs. 3D, 7A). Pleon broadly T-shaped; somites 1, 2 broadly rectangular, reaching to bases of coxae of last ambulatory legs; somites 3–5 trapezoidal, lateral margins of somites 3–5 strongly convex, convex and gently concave, respectively; somite 6 narrowly trapezoidal, proximal part of outer margin wider than distal margin, lateral margins concave (Figs. 3D, E, 7A). G1 with terminal and subterminal segments clearly demarcated by distinct membranous suture; terminal segment ca. 0.3 times length of subterminal segment, sharply bent outwards at angle of about 45° (along longitudinal axis), conical, tapering gradually to truncate tip, distal surface with numerous very small squamiform spines; subterminal segment moderately stout, broad basally, gently tapering distally, proximal part of outer margin with prominent deep concavity (Figs. 3G, 4A–E). G2 ca. 1.2 × length of G1, with long distal segment, ca. 0.5 × length of basal segment (Fig. 4F, G). Females. The largest paratype female specimen (54.3 × 42.8 mm, DABFUK) resembles the holotype in most non-sexual characters. Its pleon is ovate, covering all the surfaces of the thoracic sternites (Fig. 5B). The vulvae on somite 6 are moderately large, ovate and positioned near the posterior margin of sternite 5 (Fig. 5C). Variation. The form of the median tooth on the posterior margin of the epistome varies slightly between sexes. In males, the cristate lateral margins fused at the tip to form a distinct bilobed structure with a clear median notch when viewed frontally (Fig. 8A), but in female specimens, the notch is relatively less distinct. Colour in life. In males, the dorsal carapace surface is brown with distinct patches of pale orange on the various regions; chelipeds and ambulatory legs light brown with ventral surfaces yellowish-white to white (Fig. 1). Females generally have a similar colour and pattern (Fig. 2C, E) although in one specimen (49.6 × 35.7 mm, DABFUK) the orange patches are almost undiscernible with the carapace appearing a more uniform pale brown (Fig. 2F). Distribution. The species is known only from type locality Keeriparai, near Nagercoil, in Tamil Nadu state, southern India (Fig. 10). Etymology. The species is named after our colleague R. Ravineesh who told us about the rice field crabs in his home village and arranged for family members to help collect material. The name is used as a noun in apposition. Remarks. Oziotelphusa ravi, new species, most closely resembles O. kerala and O. biloba in carapace morphology but can easily be distinguished by its male pleonal and G1 characters. The G1 terminal segment of O. ravi, new species, is relatively stout, cylindrical, gently tapered distally and is distinctly bent laterally outwards at an angle of about 45° along the longitudinal axis, like in O. kerala (Fig. 9F). In O. kerala, however, the G1 terminal segment is relatively longer (Fig. 9F; Bahir & Yeo 2005: fig. 39B–D); and the G1 subterminal segment is broad with the proximal part of the outer margin gently concave (Fig. 9F; Bahir & Yeo 2005: fig. 39 B, C), while in O. ravi, new species, the terminal segment is relatively shorter and the subterminal segment is proportionately broader and the proximal part of the outer margin is deeply concave (Figs. 5A, B, 9B). In addition, the male pleonal somite 6 of O. kerala is also proportionately longitudinally more slender than that of O. ravi, new species (Fig. 9E versus Figs. 3E, 9A). The form of the median tooth of the posterior epistomal margin is superficially similar in these two species but in O. kerala, the cristate lateral margins fuse seamlessly at the tip, not forming an bifurcated structure in frontal view, although the inner surface of the tooth does bifurcate (Fig. 8E, F). In O ravi, new species, the tip of the median tooth is distinctly bilobed even in frontal view (Fig. 8A, B). The structure of the median tooth of the posterior epistomal margin in O. biloba and O. ravi, new species, are similar (Fig. 8A–D), but the male pleonal somite 6 of O. biloba is proportionately very slender longitudinally, with the lateral margins prominently concave (Fig. 9C) whereas in O. ravi, new species, it is proportionately broader with less concave margins (Fig. 9A). The G1 structures of O. biloba and O. ravi, new species, are quite different, even though both possess a prominent concavity on the proximal part of the outer margin (Fig. 9B, D). In O. biloba, the G1 terminal segment is more sharply tapering and is prominently bent outwards at almost 90° (Fig. 9D; Bahir & Yeo 2005: fig. 30 C–H) (G1 terminal segment stouter and bent at only about 45° along the longitudinal axis in O. ravi, new species; Fig. 9B). Oziotelphusa aurantia (Herbst, 1799) and O. bouvieri (Rathbun, 1904) are the other species found in the state of Tamil Nadu and superficially resemble O. ravi, new species, in general carapace features; and both occur in the southeastern part of the state (Bahir & Yeo 2005). Oziotelphusa aurantia can easily be separated from O ravi, new species, in having the tip of the median triangle of the posterior epistomal margin not bilobed (Bahir & Yeo 2005: fig. 9B) (versus tip distinctly bilobed; Fig. 8A); the male pleonal somite 6 is more trapezoidal in shape with barely concave lateral margins (Bahir & Yeo 2005: fig. 9A) (versus male pleonal somite 6 narrowly trapezoidal with lateral margins concave; Figs. 3E, 7B); and the G1 subterminal segment is proportionately much stouter with a smaller concavity on the proximal part of the outer margin with the terminal segment less distinctly bent (Bahir & Yeo 2005: fig. 9C–E, 10A, B) (versus G1 subterminal segment more slender, the proximal part of the outer margin has a prominent deep concavity and the terminal segment is strongly bent 45° along the longitudinal axis; Figs. 4A–E, 9B). Oziotelphusa bouvieri is easily distinguished from O. ravi, new species, in having the epibranchial tooth more prominent and sharper (Bahir & Yeo 2005: fig. 17A) (versus epibranchial tooth low; Figs. 3A, B, 6A); the tip of the median triangle of the posterior epistomal margin is not bilobed (Bahir & Yeo 2005: fig. 17B) (versus tip distinctly bilobed; Fig. 8A); the male pleonal somite 6 is proportionately broader (Bahir & Yeo 2005: fig. 17C) (versus male pleonal somite 6 narrowly trapezoidal with lateral margins concave; Figs. 3E, 7B); and the G1 subterminal proportionately stouter, the proximal part of the outer margin is sinuous without a deep concavity and the terminal segment is relatively shorter and less distinctly bent (Bahir & Yeo 2005: fig. 16A–E) (versus G1 subterminal segment more slender, the proximal part of the outer margin has a prominent deep concavity, and the terminal segment is strongly bent at 45° along the longitudinal axis; Figs. 4A–E, 9B). Ecology. Oziotelphusa ravi, new species, lives in ditches and drainage channels in banana plantations, as well as ponds and rice fields in Tamil Nadu; where the water is slow flowing or stationary (Fig. 2A). The crabs dig relatively deep burrows just above the water level (Fig. 2B), coming out at night to forage on the vegetation in and around the water (Fig. 2C). Many of the adult females collected in the period of study were carrying juvenile crabs underneath their pleon (Fig. 2D). The species faces no immediate threats to its survival as its closely associated with rice fields and other manmade aquatic habitats.Published as part of Raj, Smrithy, Kumar, Appukuttannair Biju & Ng, Peter K. L., 2017, A new species of freshwater crab of the genus Oziotelphusa Müller, 1887 (Crustacea: Decapoda: Brachyura: Gecarcinucidae) from Tamil Nadu, southern India, pp. 225-236 in Zootaxa 4363 (2) on pages 226-234, DOI: 10.11646/zootaxa.4363.2.3, http://zenodo.org/record/109869
Similarity Caching
No full textWe introduce the similarity caching problem, a variant of classical caching in which an algorithm can return an element from the cache that is similar, but not necessarily identical, to the query element. We are motivated by buffer management questions in approximate nearest-neighbor applications, especially in the context of caching targeted advertisements on the web. Formally, we assume the queries lie in a metric space, with distance function d(.,.). A query p is considered a cache hit if there is a point q in the cache that is sufficiently close to p, i.e., for a threshold radius r, we have d(p, q) <= r. The goal is then to minimize the number of cache misses, vis-a-vis the optimal algorithm. As with classical caching, we use the competitive ratio to measure the performance of different algorithms. While similarity caching is a strict generalization of classical caching, we show that unless the algorithm is allowed extra power (either in the size of the cache or the threshold r) over the optimal offline algorithm, the problem is intractable. We then proceed to quantify the hardness as a function of the complexity of the underlying metric space. We show that the problem becomes easier as we proceed from general metric spaces to those of bounded doubling dimension, and to Euclidean metrics. Finally, we investigate several extensions of the problem: dependence of the threshold r on the query and a smoother trade-off between the cache-miss cost and the query-query similarity
Architecture and security issues in fog computing applications Advances in computer and electrical engineering (ACEE) book series./ [edited by] Sam Goundar, S. Bharath Bhushan, Praveen Kumar Rayani.
No full textIncludes bibliographical references and index.As the progression of the internet continues, society is finding easier, quicker ways of simplifying their needs with the use of technology. With the growth of lightweight devices, such as smart phones and wearable devices, highly configured hardware is in heightened demand in order to process the large amounts of raw data that are acquired. Connecting these devices to fog computing can reduce bandwidth and latency for data transmission when associated with centralized cloud solutions and uses machine learning algorithms to handle large amounts of raw data. The risks that accompany this advancing technology, however, have yet to be explored. Architecture and Security Issues in Fog Computing Applications is a pivotal reference source that provides vital research on the architectural complications of fog processing and focuses on security and privacy issues in intelligent fog applications. While highlighting topics such as machine learning, cyber-physical systems, and security applications, this publication explores the architecture of intelligent fog applications enabled with machine learning. This book is ideally designed for IT specialists, software developers, security analysts, software engineers, academicians, students, and researchers seeking current research on network security and wireless systems.1. Fog resource allocation through machine learning algorithm / Gowri A. S., Shanthi Bala P. -- 2. A novel resource management framework for fog computing by using machine learning algorithm / Shanthi Thangam Manukumar, Vijayalakshmi Muthuswamy -- 3. [Retracted] Security issues in fog computing for Internet of Things / D.N. Kartheek, Bharath Bhushan -- 4. Analysis of identity-based cryptography in Internet of Things (IoT) / Aravind Karrothu, Jasmine Norman -- 5. Cloud security architecture based on fully homomorphic encryption / Vaishali Ravindra Thakare, K. John Singh -- 6. Object detection in fog computing using machine learning algorithms / Peyakunta Bhargavi, Singaraju Jyothi -- 7. Distributed intelligence platform to the edge computing / Xalphonse Inbaraj -- 8. Internet of Things and fog computing applications in intelligent transportation systems / Korupalli V. Rajesh Kumar, K. Dinesh Kumar, Ravi Kumar Poluru, Syed Muzamil Basha, M. Praveen Kumar Reddy -- 9. Agribot / Ravi Kumar Poluru, M. Praveen Kumar Reddy, Rajesh Kaluri, Kuruva Lakshmanna, G. Thippa Reddy -- 10. Towards efficient resource management in fog computing : a survey and future directions / M. Sudhakara, K. Dinesh Kumar, Ravi Kumar Poluru, R. Lokesh Kumar, S. Bharath Bhushan.1 online resource (205 pages)
Ovarian Clear Cell Adenofibroma of Low Malignant Potential developing into Clear Cell Adenocarcinoma
No full textOvarian clear cell adenofibroma is uncommon, and borderline clear cell adenofibroma (low malignant potential) is extremely rare. Borderline clear cell adenofibromas may represent the precursor lesion of clear cell adenocarcinoma of the ovary, but this has not been established. We present a case of a woman in her mid-fifties with a clear cell adenofibroma ranging from benign to borderline to frankly invasive. While some clear cell adenocarcinomas are thought to arise from endometriosis, this range of findings supports the theory that some ovarian clear cell adenocarcinomas originate from borderline tumors.Peer reviewe
Anomalous magnetic hysteresis loops and small H<SUB>c1</SUB> values in high T<SUB>c</SUB> superconductors
No full textWe have studied the hysteresis loops of RBa2Cu3O7 (R=Gd, Ho and Y) and detected anomalies in some of them. The observed anomalies support a recent prediction by Ravi Kumar and Chaddah based on an extension of Bean's model. The anomalies indicate low Hc1 values and we have confirmed this by studying the onset of low-field hysteresis in less than 10 Oe at 77 K for these high Tc, superconductors
Anomalous magnetic hysteresis loops and small H<SUB>c1</SUB> values in high T<SUB>c</SUB> superconductors
Get PDFWe have studied the hysteresis loops of RBa2Cu3O7 (R=Gd, Ho and Y) and detected anomalies in some of them. The observed anomalies support a recent prediction by Ravi Kumar and Chaddah based on an extension of Bean's model. The anomalies indicate low Hc1 values and we have confirmed this by studying the onset of low-field hysteresis in less than 10 Oe at 77 K for these high Tc, superconductors
Deep learning based protocol to construct an immune-related gene network of host-pathogen interactions in plants
No full textSupplementary data File
Sweetners perception of polyols
No full textThis Dissertation / Report is the outcome of investigation carried out by the creator(s) / author(s) at the department/division of Central Food Technological Research Institute (CFTRI), Mysore mentioned below in this page
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