107 research outputs found
Zalmoxis muelleri
No full textZalmoxis muelleri new name Zalmoxis neoguinensis Müller, 1917, p. 253, 256–258, figs. 3–5 [junior secondary homonym of Euzalmoxis neoguinensis Roewer, 1915]; Roewer, 1923, p. 90, fig. 87 a–b.; Goodnight & Goodnight, 1957, p. 81–83. Gagirius neoguinensis [partim.]: Roewer, 1949 a, p. 28. Record. *Sattelberg, Wilhelmshafen, New Guinea [Madang, Papua New Guinea]; other unspecified localities in New Guinea. Etymology. Our replacement name honors the original author of this species, Adolf Müller.Published as part of Sharma, Prashant P., Kury, Adriano B. & Giribet, Gonzalo, 2011, Zalmoxidae (Arachnida: Opiliones: Laniatores) of the Paleotropics: a catalogue of Southeast Asian and Indo-Pacific species, pp. 37-58 in Zootaxa 2972 on pages 49-50, DOI: 10.5281/zenodo.20662
A Novel Immersed Boundary Method for Direct Numerical Simulations of Solid-Fluid Flows
No full textThis thesis has been submitted in fulfilment of the requirements for a postgraduate degree (e.g. PhD, MPhil, DClinPsychol) at the University of Edinburgh. Please note the following terms and conditions of use: • This work is protected by copyright and other intellectual property rights, which are retained by the thesis author, unless otherwise stated. • A copy can be downloaded for personal non-commercial research or study, without prior permission or charge. • This thesis cannot be reproduced or quoted extensively from without first obtaining permission in writing from the author. • The content must not be changed in any way or sold commercially in any format or medium without the formal permission of the author. • When referring to this work, full bibliographic details including the author, title, awarding institution and date of the thesis must be given
Zalmoxis kaktinsae, sp. nov.
No full text<i>Zalmoxis kaktinsae</i> sp. nov. <p>Figs. 9–11</p> <p> <b>Types</b>. Male holotype (MNHN [ex MCZ DNA 102350]) from Mt. Mou, summit (22° 3' 36.5" S, 166° 20' 56.2" E), New Caledonia, 1227 m elevation, collected 12 April 2007 by J. Murienne and P.P. Sharma from sifted litter. 1 male paratype (used for DNA extraction, dissected for genitalia, and mounted on SEM stubs MCZ 124562– 124563]), same collecting data as holotype.</p> <p> <b>Etymology.</b> The name honors Natalia Kaktins, a secondary school teacher of Latin and the classics who introduced the author to the mythology of Zalmoxis and other Thracian deities.</p> <p> <b>Diagnosis.</b> Distinguished from congeners by the belt of large tubercles on sternite 7; the large tubercle on the lateral-most part of each opisthosomal sternite, forming a row on each side; armature of tibia IV in males, which bears a ventral row of tubercles with a single large tubercle in the center, and three smaller tubercles distally and five proximally; rutrum subrectangular in shape, longer than wide, tapering proximally; and a “double” pergula fused medially, bearing eight setae set equidistant from each other.</p> <p> <b>Description.</b> Total length of male holotype 2.04, greatest width of prosoma 0.86, greatest width of opisthosoma 1.36; length-to-width ratio 1.50. Body campaniform, dark orange to brown (in alcohol, depending on incidence of light), almost entirely with dense microgranulate surface microstructure. Eyes present on low, welldeveloped ocularium. Ocularium wider than long, removed from anterior margin of carapace, without spines or tubercles. Anterior margin of carapace with two pairs of pegs above coxae of leg I and single median peg. Mesotergum generally smooth, mesotergal grooves distinctly “V”-shaped. Free tergites armed with regular belts of pointed setose tubercles (Fig. 9).</p> <p>Ventral prosomal complex with coxae II and III meeting in midline, coxae I and IV not so (Fig. 10 a). Anterior and posterior margins of coxae III with tubercular bridges to adjacent coxae, and coxae I–II with low setose tubercles. Coxae IV greatly enlarged, with setose tubercles concentrated on anterior surface. Genital operculum semicircular. Spiracles not concealed, anterior to row of tubercles. Single large tubercle on the lateral-most part of each opisthosomal sternite, forming an anteroposterior row of large tubercles along lateral edges of sternites. Opisthosomal sternites additionally armed with low tubercles tapering medially, except sternite 7, which bears six large tubercles medially and two larger tubercles laterally. Anal plate armed with five tubercles approximating the size of median tubercles of sternite 7 (Fig. 10 b).</p> <p>Chelicerae (Fig. 11 a) sexually monomorphic, with prominent bulla on proximal article. Proximal article with denticulate granulation basally and ventrally. Second article not incrassate, free of ornamentation, with dorsal margin bearing several setae. Distal article with delicate dentition, smooth, free of ornamentation. Palpi (Fig. 11 b) robust and spined ventrally and/or ventrolaterally, typical of zalmoxids. Palpal tarsus with two pairs of megaspines.</p> <p>Legs (I–IV) finely granulated, of striated appearance due to de-pigmented regions on leg joints (Fig. 11 c–f). Leg I trochanter with one ventral and one dorsal tubercle, femur with ventral row of small tubercles (Fig. 11 c). Leg IV incrassate, elongated, and heavily armored (Fig. 11 f). Trochanter IV with one large ventral tubercle; femur IV bearing ventral row of four prominent tubercles with intermittent small tubercles. Femur, patella, and tibia IV dorsally and laterally covered with low setose tubercles. Male tibia IV with one dorsal row of tubercles enlarging proximally; and one ventral row of nine tubercles, with the largest, distally-directed, hook-like tubercle flanked by three smaller tubercles distally and five proximally. Metatarsus IV with a ventral row of setose tubercles and a lateral row of bulbous setose tubercles. Metatarsi I–IV divided distally, with calcaneus less ornamented but generally more setose. Tarsal claws I–IV smooth, unmodified. Tarsal segmentation 3: 4: 5: 5 (Fig. 11).</p> <p>Appendage measurements of holotype (length/width):</p> <p>[table omitted]</p> <p>Penis (Fig. 12) with two pairs of setae on diminutive rutrum and a “double” pergula fused medially. Eight setae on pergula (set approximately equidistant from each other). One pair of setae displaced from midline and slightly posterior to pergula. Rutrum small and subrectangular, longer than wide, without lateral arrowhead-like extensions or rounded edges, and tapering proximally. Pergula slightly projecting ventrally. Female unknown.</p> <p> <b>Distribution.</b> Known only from type locality.</p>Published as part of <i>Sharma, Prashant P., 2012, New Australasian Zalmoxidae (Opiliones: Laniatores) and a new case of male polymorphism in Opiliones, pp. 1-35 in Zootaxa 3236</i> on pages 14-17, DOI: 10.11646/zootaxa.3236.1.1, <a href="http://zenodo.org/record/212212">http://zenodo.org/record/212212</a>
Multilevel Solvers for Stochastic Fluid Flows
No full textUncertainty is ubiquitous in many areas of science and engineering. It may result from the inadequacy of mathematical models to represent the reality or from unknown physical parameters that are required as inputs for these models. Uncertainty may also arise due to the inherent randomness of the system being analyzed. For many problems of practical interest, uncertainty quantification (UQ) can involve computations that are intractable even for the modern supercomputers, if conventional mathematical techniques are utilized. The reason is typically a product of complexity factors associated with many samples needed to compute the statistics, and for each sample, complexity associated with the spatio-temporal scales characteristics to the system. The main objective of this research is to obtain multilevel solvers for stochastic fluid flow problems with high-dimensional uncertainties. In our approach, the complexity arising due to sampling is overcome by the multilevel Monte Carlo (MLMC) method and complexity due to spatio-temporal scales is eliminated via the multigrid solver. Historically, Monte Carlo (MC) type methods have been proven to be the methods of choice for problems with a large uncertainty dimension as they do not suffer from the curse of dimensionality. A well-known computational bottleneck associated with the plain MC method is the slow convergence of the sampling error. For problems involving a wide range of space and time scales, ensuring a low mean square error will require a large number of MC samples on a very fine computational mesh making the estimator very expensive. Inspired by the multigrid ideas, the MLMC method generalizes the standard MC to multiple grids, exhibiting an exceptional improvement. The efficiency of the MLMC method comes from solving the problem of interest on a coarse grid and subsequently adding corrections based on fewer mesh resolutions. On the coarsest grid, a large number of samples can be computed inexpensively. The corrections computed on fewer grids, have smaller variances and can be estimated accurately using only fewer samples. The estimates at different levels are then combined using a telescopic sum...Aerodynamic
A scheduling policy experiment for lean implementation
No full textThesis (S.M.M.O.T.)--Massachusetts Institute of Technology, Sloan School of Management, Management of Technology Program, 1999.This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.Includes bibliographical references (leaves 178-184).by Sawan P. Deshpande.S.M.M.O.T
Correction: Kaushik, P.; Kumar, S. Transcriptome Analysis of Bael (Aegle marmelos (L.) Corr.) a Member of Family Rutaceae. Forests 2018, 9, 450
No full textThe (Forests) Editorial Office wishes to make the following changes to the author’s paper [...
Ion acceleration in electrostatic field of charged cavity created by ultra-short laser pulses of 1020-1021 W/cm2
No full textIon acceleration resulting from the interaction of ultra-high intensity and ultra-high contrast (∼10−10) laser pulses with thin Al foil targets at 30° angle of laser incidence is studied. Proton maximum energies of 30 and 18 MeV are measured along the target normal rear and front sides, respectively, showing intensity scaling as Ib. For the target front bfront = 0.5-0.6 and for the target rear brear = 0.7-0.8 is observed in the intensity range 1020-1021 W/cm2. The fast scaling from the target rear ∼I0.75 can be attributed enhancement of laser energy absorption as already observed at relatively low intensities. The backward acceleration of the front side protons with intensity scaling as ∼I0.5 can be attributed to the to the formation of a positively charged cavity at the target front via ponderomotive displacement of the target electrons at the interaction of relativistic intense laser pulses with a solid target. The experimental results are in a good agreement with theoretical predictions. © 2017 Author(s)1111sciescopu
Characterization of Ingestion through the Rim Seal of Rotor-Stator Disk Cavity in a Subscale Single-Stage Axial Turbine
No full textabstract: In order to achieve higher gas turbine efficiency, the main gas temperature at turbine inlet has been steadily increased from approximately 900°C to about 1500°C over the last few decades. This temperature is higher than the maximum acceptable temperature for turbine internals. The hot main gas may get ingested into the space between rotor and stator, the rotor-stator disk cavity in a stage because of the pressure differential between main gas annulus and the disk cavity. To reduce this ingestion, the disk cavity is equipped with a rim seal; additionally, secondary (purge) air is supplied to the cavity. Since the purge air is typically bled off the compressor discharge, this reducing the overall gas turbine efficiency, much research has been carried out to estimate the minimum purge flow necessary (cw,min) for complete sealing of disk cavities.
In this work, experiments have been performed in a subscale single-stage axial turbine featuring vanes, blades and an axially-overlapping radial-clearance seal at the disk cavity rim. The turbine stage is also equipped with a labyrinth seal radially inboard. The stage geometry and the experimental conditions were such that the ingestion into the disk cavity was driven by the pressure asymmetry in the main gas annulus. In the experiments, time-averaged static pressure was measured at several locations in the main annulus and in the disk cavity; the pressure differential between a location on the vane platform close to lip (this being the rim seal part on the stator) and a location in the 'seal region' in the cavity is considered to be the driving potential for both ingestion and egress. Time-averaged volumetric concentration of the tracer gas (CO2) in the purge air supplied was measured at multiple radial locations on the stator surface. The pressure and ingestion data were then used to calculate the ingestion and egress discharge coefficients for a range of purge flow rates, employing a simple orifice model of the rim seal. For the experiments performed, the egress discharge coefficient increased and the ingestion discharge coefficient decreased with the purge air flow rate. A method for estimation of cw,min is also proposed.Dissertation/ThesisMasters Thesis Mechanical Engineering 201
Effect of Cattle Urine and Humic Acid on Growth of Nutmeg Grafts
No full textThe experiment was conducted at AICRP Oil Palm, College of Horticulture, Mulde, Sindhudurg under Dr. B. S. K. K. V. Dapoli, during the year 2020-2023 to assess the Effect of Cattle urine and humic acid spray sprays on growth of nutmeg grafts. The experiment was laid out in Randomized Block Design with three replications with eight different treatments of foliar application, cattle urine spray at (15% ,25%), and Humic acid spray at (0.4) and drenching, cattle urine drench at (15%, 25%), Humic acid drench at (0.2, 0.6), and Control (No spray), are applied on nutmeg grafts after 45 days of grafting up to 135 days and different growth parameter observation were recorded up to highest survival and saleable percentages. The best results was obtained from treatment T-7 (0.4% Humic acid spray) record significantly highest survival (95%), saleable percent (97.67%) along with highest height (15.85cm), girth (24.21mm), number of leaves (24.21), leaf length (15.85cm), leaf area (44.35cm2) and tap root in T-7 length (20.60cm).The highest cost benefit ratio were recorded significantly highest in T-7 hence for the excellent growth of nutmeg grafts in Konkan region of Maharashtra 0.4% humic acid spray is recommended
A survey of modeling, rendering and animation of clouds in computer graphics
No full textClouds play an important role in enhancing the realism of outdoor scenes in computer graphics (CG). Realistic cloud generation is a challenging task, which entails processes such as modeling, photorealistic rendering and simulation of the clouds. To these ends, several techniques have been proposed within the CG community in the last 4 decades with one or more of the above stated focuses. The growth of modern hardware has also enabled development of techniques that can achieve cloud display and animation at interactive frame rates. In this survey, we review the prominent work in the domain and also summarize the evolution of the research over the time. © 2020, The Author(s).Open access</p
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