Bibliographies thématiques / Asymmetric profiles

Littérature scientifique sur le sujet « Asymmetric profiles »

Auteur : Grafiati
Publié le 14 mars 2023

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Articles de revues sur le sujet "Asymmetric profiles"

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Deg, N., S.-L. Blyth, N. Hank, S. Kruger et C. Carignan. « Systematically asymmetric : a comparison of H i profile asymmetries in real and simulated galaxies ». Monthly Notices of the Royal Astronomical Society 495, no 2 (18 mai 2020) : 1984–2001. http://dx.doi.org/10.1093/mnras/staa1368.

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ABSTRACT We examine different measures of asymmetry for galaxy H i velocity profiles. We introduce the channel-by-channel asymmetry and the velocity-of-equality statistics to quantify profile asymmetries. Using a sample of simulated galaxies, we examine how these and the standard lopsidedness morphometric statistic depend on a variety of observational effects, including the viewing angle and inclination. We find that our newly introduced channel-by-channel asymmetry is less sensitive to the effects of viewing angle and inclination than other morphometrics. Applying our statistics to the WHISP (Westerbork H i survey of Irregular and SPiral galaxies) H i galaxy sample, we also find that the channel-by-channel asymmetry is a better indicator of visually classified asymmetric profiles. In addition, we find that the lopsidedness–velocity of equality space can be used to identify profiles with deep central dips without visual inspection.
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Manuwal, Aditya, Aaron D. Ludlow, Adam R. H. Stevens, Ruby J. Wright et Aaron S. G. Robotham. « Drivers of asymmetry in synthetic H i emission-line profiles of galaxies in the eagle simulation ». Monthly Notices of the Royal Astronomical Society 510, no 3 (4 décembre 2021) : 3408–29. http://dx.doi.org/10.1093/mnras/stab3534.

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ABSTRACT We study the shapes of spatially integrated $\rm{H}\, \small {{I}}$ emission-line profiles of galaxies in the eagle simulation using three separate measures of the profile’s asymmetry. We show that the subset of eagle galaxies whose gas fractions and stellar masses are consistent with those in the xGASS survey also have similar $\rm{H}\, \small {{I}}$ line asymmetries. Central galaxies with symmetric $\rm{H}\, \small {{I}}$ line profiles typically correspond to rotationally supported $\rm{H}\, \small {{I}}$ and stellar discs, but those with asymmetric line profiles may or may not correspond to dispersion-dominated systems. Galaxies with symmetric $\rm{H}\, \small {{I}}$ emission lines are, on average, more gas rich than those with asymmetric lines, and also exhibit systematic differences in their specific star formation rates, suggesting that turbulence generated by stellar or AGN feedback may be one factor contributing to $\rm{H}\, \small {{I}}$ line asymmetry. The line asymmetry also correlates strongly with the dynamical state of a galaxy’s host dark matter halo: older, more relaxed haloes host more-symmetric galaxies than those hosted by unrelaxed ones. At fixed halo mass, asymmetric centrals tend to be surrounded by a larger number of massive subhaloes than their symmetric counterparts, and also experience higher rates of gas accretion and outflow. At fixed stellar mass, central galaxies have, on average, more symmetric $\rm{H}\, \small {{I}}$ emission lines than satellites; for the latter, ram pressure and tidal stripping are significant sources of asymmetry.
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Kulkarni, P., et D. Dutta. « An Investigation of Techniques for Asymmetry Rectification ». Journal of Mechanical Design 117, no 4 (1 décembre 1995) : 620–26. http://dx.doi.org/10.1115/1.2826730.

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This paper is concerned with symmetry and asymmetry in objects. Earlier studies on the subject have dealt with the detection of symmetry. We study the problem of asymmetry rectification, i.e., given an asymmetric profile, suggest geometric changes to make it symmetric. We have investigated two techniques for asymmetry rectification. This paper reports on the techniques and the results. First, we analyze the problem using skeleton representations and propose a simple algorithm for rectifying asymmetric convex profiles. Next, we outline an optimization scheme for the rectification of convex and nonconvex profiles, in 2D and 3D. Implemented examples are presented for both algorithms.
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Badel, Anne, Laëtitia Breuil, Pierre Laville et Leslie Regad. « Exploration of the Structural Asymmetry Induced by the Intrinsic Flexibility of HIV-2 Protease ». Symmetry 14, no 2 (11 février 2022) : 362. http://dx.doi.org/10.3390/sym14020362.

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HIV-2 protease (PR2) is a homodimer targeted by drugs in the treatment of HIV-2 infections. This dimer is often considered symmetric. However, exploration of crystallographic structures showed that the two chains of PR2 exhibit different conformations. This study presents the first analysis of the structural asymmetry of PR2 induced by its intrinsic flexibility. We followed the structural asymmetry of PR2 throughout a molecular dynamics (MD) simulation of 1 microsecond. To do so, we quantified the global and local structural asymmetries of 1001 structures extracted from the MD simulation using the root mean square deviation (RMSD) between the two chains in each structure. We then analyzed the links between global and local asymmetry and PR2 flexibility. Our results showed that the global asymmetry of PR2 evolves over time and that it is not explained by the asymmetry of only one region of PR2. We noted that the most flexible regions of PR2 are the most asymmetric regions, revealing that the structural asymmetry of a region is induced by its intrinsic flexibility. Using multivariate analysis methods, we identified six asymmetric profiles varying from structures exhibiting weak asymmetry to structures with extreme asymmetry in at least eight different regions. The analysis of transitions between the different profiles in the MD simulation showed that two consecutive structures often exhibit similar asymmetric profiles, revealing small deformations. To conclude, this study provides insights which help to better understand PR2’s structure, dynamics, and deformations.
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Ida, T., H. Hibino et H. Toraya. « Deconvolution of instrumental aberrations for synchrotron powder X-ray diffractometry ». Journal of Applied Crystallography 36, no 2 (15 mars 2003) : 181–87. http://dx.doi.org/10.1107/s0021889802021131.

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A method to remove the effects of instrumental aberrations from the whole powder diffraction pattern measured with a high-resolution synchrotron powder diffractometer is presented. Two types of asymmetry in the peak profiles caused by (i) the axial-divergence aberration of the diffractometer (diffractometer aberration) and (ii) the aberration of the monochromator and focusing optics on the beamline (beamline aberration) are both taken into account. The method is based on the whole-pattern deconvolution by Fourier technique combined with the abscissa-scale transformation appropriate for each instrumental aberration. The experimental powder diffraction data of LaB6(NIST SRM660) measured on beamline BL-4B2at the Photon Factory in Tsukuba have been analysed by the method. The formula of the scale transformation for the diffractometer aberration hasa prioribeen derived from the instrumental function with geometric parameters of the optics. The strongly deformed experimental peak profiles at low diffraction angles have been transformed to sharp peak profiles with less asymmetry by the deconvolution of the diffractometer aberration. The peak profiles obtained by the deconvolution of the diffractometer aberration were modelled by an asymmetric model profile function synthesized by the convolution of the extended pseudo-Voigt function and an asymmetric component function with an empirical asymmetry parameter, which were linearly dependent on the diffraction angle. Fairly symmetric peak profiles have been obtained by further deconvolution of the empirically determined asymmetric component of the beamline aberration.
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STRITE, DANIEL, PAUL J. MASSMAN, NORMA COOKE et RACHELLE S. DOODY. « Neuropsychological asymmetry in Alzheimer's disease : Verbal versus visuoconstructional deficits across stages of dementia ». Journal of the International Neuropsychological Society 3, no 5 (septembre 1997) : 420–27. http://dx.doi.org/10.1017/s1355617797004207.

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The incidence of clinically apparent asymmetric profiles of neuropsychological deficits in Alzheimer's disease (AD) patients similar to those reported in the PET literature is currently unclear. This study investigated lateral neuropsychological asymmetry using principal component factor analysis in a sample of 153 patients diagnosed with probable AD. Using factor scores, patients were classified into groups exhibiting asymmetric or symmetric profiles of neuropsychological deficits. In the analysis of lateral asymmetry, 27.5% of patients were classified as asymmetric (10% verbally and 17% visuospatially). Consistent with reports of continued asymmetry beyond the mild dementia stage, asymmetry was exhibited in the mild, moderate, and severely demented groups. These findings of neuropsychological asymmetry across stages of dementia are consistent with the picture of significant neuropsychological heterogeneity in AD that has been emerging in the decade. (JINS, 1997, 3, 420–427.)
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Watts, Adam B., Chris Power, Barbara Catinella, Luca Cortese et Adam R. H. Stevens. « Global H i asymmetries in IllustrisTNG : a diversity of physical processes disturb the cold gas in galaxies ». Monthly Notices of the Royal Astronomical Society 499, no 4 (15 octobre 2020) : 5205–19. http://dx.doi.org/10.1093/mnras/staa3200.

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ABSTRACT Observations of the cold neutral atomic hydrogen (H i) in and around disc galaxies have revealed that spatial and kinematic asymmetries are common place, and are reflected in the global H i spectra. We use the TNG100 box from the IllustrisTNG suite of cosmological simulations to study the conditions under which these asymmetries may arise in current theoretical galaxy formation models. We find that more than 50 per cent of the sample has at least a 10 per cent difference in integrated flux between the high- and low-velocity half of the spectrum, thus the typical TNG100 galaxy has an H i profile that is not fully symmetric. We find that satellite galaxies are a more asymmetric population than centrals, consistent with observational results. Using halo mass as a proxy for environment, this trend appears to be driven by the satellite population within the virial radius of haloes more massive than 1013 M⊙, typical of medium/large groups. We show that, while the excess of H i asymmetry in group satellites is likely driven by ram pressure, the bulk of the asymmetric H i profiles observed in TNG100 are driven by physical processes able to affect both the central and satellite populations. Our results highlight how asymmetries are not driven solely by environment, and multiple physical processes can produce the same asymmetric shape in global H i spectra.
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Rao, K. Sreenivasa, G. E. Babu, P. Ravi kumar, M. Anusha, A. Saiprashad et P. Kiran Babu. « Validation and Profile Modification of a Spur Gear to Improve the Gear Tooth Strengths ». International Journal of Innovative Research in Computer Science & ; Technology 10, no 4 (26 juillet 2022) : 218–21. http://dx.doi.org/10.55524/ijircst.2022.10.4.27.

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The idea of using asymmetric tooth forms has gained momentum in gearing design. Similar to symmetric basic rack gears, tooth action parameters are established in the first stage. The second stage involves calculating the unified generating basic rack for a set of mated gears. In some cases, it is possible to determine the features of specific fundamental rack tooth profiles for each gear in a transmission. Gearings with asymmetrical profiles have the advantage of having a higher-pressure angle than operational profiles (as a result of a lower pressure angle than non-operating profiles) and the possibility for a considerable improvement in the face contact ratio. In this study, symmetric and asymmetric tooth profiles will be compared using the finite element analysis tool Ansys. Asymmetric (different pressure angle) and symmetric (different pressure angle) tooth profiles will be designed and built in the 3D modelling software CATIA. The designs made with different materials will go through structural examination (mild steel and EN 32 steel).
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Fuhrmeister, B., S. Czesla, J. H. M. M. Schmitt, S. V. Jeffers, J. A. Caballero, M. Zechmeister, A. Reiners et al. « The CARMENES search for exoplanets around M dwarfs ». Astronomy & ; Astrophysics 615 (juillet 2018) : A14. http://dx.doi.org/10.1051/0004-6361/201732204.

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Stellar activity is ubiquitously encountered in M dwarfs and often characterised by the Hα line. In the most active M dwarfs, Hα is found in emission, sometimes with a complex line profile. Previous studies have reported extended wings and asymmetries in the Hα line during flares. We used a total of 473 high-resolution spectra of 28 active M dwarfs obtained by the CARMENES (Calar Alto high-Resolution search for M dwarfs with Exo-Earths with Near-infrared and optical Echelle Spectrographs) spectrograph to study the occurrence of broadened and asymmetric Hα line profiles and their association with flares, and examine possible physical explanations. We detected a total of 41 flares and 67 broad, potentially asymmetric, wings in Hα. The broadened Hα lines display a variety of profiles with symmetric cases and both red and blue asymmetries. Although some of these line profiles are found during flares, the majority are at least not obviously associated with flaring. We propose a mechanism similar to coronal rain or chromospheric downward condensations as a cause for the observed red asymmetries; the symmetric cases may also be caused by Stark broadening. We suggest that blue asymmetries are associated with rising material, and our results are consistent with a prevalence of blue asymmetries during the flare onset. Besides the Hα asymmetries, we find some cases of additional line asymmetries in He I D3, Na I D lines, and the He I line at 10 830 Å taken all simultaneously thanks to the large wavelength coverage of CARMENES. Our study shows that asymmetric Hα lines are a rather common phenomenon in M dwarfs and need to be studied in more detail to obtain a better understanding of the atmospheric dynamics in these objects.
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Almeida, J. Sánchez, et B. W. Lites. « Asymmetric Stokes Q, U and V Line Profiles Observed in Sunspots ». International Astronomical Union Colloquium 141 (1993) : 177–79. http://dx.doi.org/10.1017/s0252921100029031.

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AbstractWe present a systematic description of the asymmetric shapes the Stokes line profiles exhibit in sunspots. These asymmetries seem to be caused by gradients of both magnetic field and velocity in the photospheres of sunspots.
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Thèses sur le sujet "Asymmetric profiles"

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Ilie, Katherine-Rodica, et Katherine ilie@rmit edu au. « Modelling, Simulation and Optimisation of Asymmetric Rotor Profiles in Twin-screw Superchargers ». RMIT University. Aerospace, Mechanical and Manufacturing Engineering, 2007. http://adt.lib.rmit.edu.au/adt/public/adt-VIT20080213.144857.

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There is a growing recognition worldwide of the need for more powerful, smaller petrol engines, capable of delivering the higher picking power of larger engines, yet still being economical and environmentally friendly when used for day-to-day driving. An engineering solution for more efficient engines has been considered by research so far. It has been identified that superchargers can potentially improve the performance of automotive engines; therefore research has focused on developing superchargers and supercharger components with higher efficiency. Of particular interest to the research presented in this thesis has been the twin-screw supercharging compressor with design adapted for automotive use (the twin-screw supercharger). The performance of this supercharger type depends on the volume and total losses of the air flow through the supercharger rotors more than on any other aspects of its behaviour. To accurately predict the efficiency of the twin-screw su percharger for matching a particular engine system, accurate supercharger design is required. The main objective of this research was the investigation of the existing limitations of twin-screw superchargers, in particular leakage and reduced efficiency, leading to the development of optimal asymmetric rotor profiles. This research has been completed in four stages defining an innovative rotor design method. The parametric three-dimensional geometric model of twin-screw supercharger rotors of any aspect ratio was developed. For model validation through visualisation, CAD rotor models with scalable data were generated in commercial CAD software and calibrated experimentally by Laser Doppler Velocimetry (LDV) tests. Calibrated rotor profile data can be transferred into CAD-CFD interface for flow simulation and performance optimisation. Through the application of this new rotor design method, new opportunities are created for the twin-screw supercharger design practice, making it a part of the engineering solution for more efficient engines.
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Ignace, Richard. « Asymmetric Shapes of Radio Recombination Lines from Ionized Stellar Winds ». Digital Commons @ East Tennessee State University, 2019. https://dc.etsu.edu/etsu-works/5502.

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Recombination line profile shapes are derived for ionized spherical stellar winds at radio wavelengths. It is assumed that the wind is optically thick owing to free-free opacity. Emission lines of arbitrary optical depth are obtained assuming that the free-free photosphere forms in the outer, constant expansion portion of the wind. Previous works have derived analytic results for isothermal winds when the line and continuum source functions are equal. Here, semi-analytic results are derived for unequal source functions to reveal that line shapes can be asymmetric about line center. A parameter study is presented and applications discussed.
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Prause, Nils [Verfasser], et Dieter [Akademischer Betreuer] Reimers. « The influence of asymmetric line profiles on the reliability of the search for varying fundamental constants / Nils Prause. Betreuer : Dieter Reimers ». Hamburg : Staats- und Universitätsbibliothek Hamburg, 2014. http://d-nb.info/1059237946/34.

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Sanders, Aaron Anthony. « An Experimental Investigation of the Influence of Elliptical Root Shapes and Asymmetric Teeth on Root Stresses and Bending Fatigue Lives ». The Ohio State University, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=osu1290530501.

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DE, MARTIN ANDREA. « Development of a novel gerotor pump for lubrication systems of aeronautic engines ». Doctoral thesis, Politecnico di Torino, 2018. http://hdl.handle.net/11583/2698519.

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The technology of lubrication systems for aircrafts engines has seen significant development during the history of aeronautics and has progressed in parallel with the evolution of the engines themselves. Starting from the first, wetsump schemes derived from automotive applications, more complex systems and components have been introduced. The progressive increase of aeronautic engines’ power and speed, as well as that of the maximum operative altitude of the aircraft, have increased the lubricant flow rate required to avoid severe mechanical issues that can cause dangerous conditions for the vehicle and its users. Currently, the main focus on the development of novel lubrication pumps is aimed at reducing the pumps’ weight and envelope while maintaining, or possibly increasing, their reliability. The first two objective could be pursued by searching for novel pump types and/or increasing the pump speed in order to downsize its required capacity, but the low-pressure environment, typical of the lubrication circuits, over imposes a few, severe, limitations to avoid cavitation occurrence that decrease the effectiveness of this approach. The central aim of the presented research, performed within the program “Greening the Propulsion”, is to provide a theoretical framework to help in the development of a novel gerotor pump for the lubrication of aeronautic engines.The first step of the research involves the study of the state of the art of aeronautic engines’ lubrication systems, providing particular care to the effect that any design choice and possible operational condition may have on the lubrication pump design. Hence, the state of the art for gerotor pumps is investigated; results of this study are used, along with catalogue comparisons, to build simplified sizing tools to perform a benchmarking activity involving gerotors and other low pressure pumps type. This activity, performed to position gerotor pumps in the aeronautic engine lubrication market, is then used as a starting point to highlight the weak points of gerotors traditional design and to propose some possible solutions to enhance the pumps performances. To study the outcomes of these modifications, a rigorous theoretical framework is required; sizing and modeling criteria, based on the theory of gearing and compressible fluids, are hence detailed and used to build an Automatic Design and Simulation Framework, able to automatically design, validate and simulate a novel gerotor pump given a minimum number of geometrical and physical input parameters. This design and simulation tool is then used to evaluate the performance boost provided by the proposed variations and to optimize the gears profiles by pairing it with a multiobjective algorithm based on evolutionary strategies. Another critical component of any lubrication system is the pressure relief valve used to avoid the occurrence of dangerous conditions for the pipes integrity. A side activity involving the study of a preliminary sizing tool for pressure relief valve is hence performed. A preliminary design framework is presented and discussed, highlighting the importance of the valve discharge coefficient. To study its dependence on the valve’s geometry, a lengthy CFD simulation campaign is performed varying the poppet shape and the fluid Reynolds’ number. Results are hence discussed and used inside the design framework.
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Borgström, Veronika. « Mapping asymmetries of the H-alpha line profile in solar flares ». Thesis, Stockholms universitet, Institutionen för astronomi, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-169334.

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In this paper we analyze the small C1.5 class solar flare observed on June 30th 2013 by the Swedish Solar Telescope. The evolution of asym- metries in the Hα line profile of the solar flare was studied where it could be seen how the number of red asymmetric regions had a maximum value near the beginning of the flare and then decreases rapidly in the first 4 minutes of the observations. This could be interpreted as a correlation with the HXR and microwave emissions of the impulsive phase of the flare as these emissions also typically have a similar rapid increase and decrease of emission intensity.
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Larkin, Janet Dawne. « Kinematic profiles of the hands in a bimanual task : a study in movement asymmetry / ». Access Digital Full Text version, 1985. http://pocketknowledge.tc.columbia.edu/home.php/bybib/10992509.

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Thesis (Ed.D.)--Teachers College, Columbia University, 1985.
Typescript; issued also on microfilm. Sponsor: J. R. Higgins. Dissertation Committee: A. M. Gentile. Includes bibliographical references: (leaves 48-52).
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Nurgaliev, Daniyar Rashidovich. « A Study of the Radial and Azimuthal Gas Distribution in Massive Galaxy Clusters ». Thesis, Harvard University, 2013. http://dissertations.umi.com/gsas.harvard:11514.

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Clusters of galaxies are particularly interesting astrophysical systems, are the largest bound structures in the Universe, and contain fair sample of cosmic ingredients. Studies of cluster abundance as a function of mass and redshift were critical in establishing the standard model of cosmology. This dissertation presents results from X-ray imaging of massive distant (M > 10^14 M; 0:3 < z < 1.2) clusters, found via X-ray emission or Sunyaev-Zeldovich eff ect. This is the world's largest sample of massive galaxy clusters. We explore the radial and azimuthal profi les of the X-ray emitting gas and show that clusters are self-similar objects: their internal structure is largely independent of the cluster's mass or redshift, and the fractions of di fferent types of clusters does not change with redshift. We also present a new statistical technique for measuring a cluster's deviations from a perfect axisymmetric shape, which is especially useful in the case of low photon count observations of distant clusters.
Physics
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Albuloushi, Nour M. S. M. J. « Governance configurations : Testing the global value chain framework ». Thesis, Queensland University of Technology, 2018. https://eprints.qut.edu.au/116771/2/Nour%20M%20S%20M%20J_Albuloushi_Thesis.pdf.

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The Global Value Chain Governance Framework is empirically tested in this thesis. The framework has become a highly influential in determining the governance structure of firms. Despite the framework being widely influential and used extensively across industry-specific case research and international development agencies, there has been limited empirical validation of the framework's predictions. Adopting a two-study quantitative methodology and configuration analysis, in this thesis an important foundational advancement is advanced in the application of configuration analysis to test the GVC governance framework. A foundational elaboration of theory is offered by, first, conceptualising the GVC core concepts and, second, executing empirical research as a basis for developing new theoretical insights.
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Coetzee, Gert Louis. « Investigating the bottom free surface nappe (Ogee profile) across a sharp-crested weir influenced by the flow in an asymmetrical approach channel ». Diss., University of Pretoria, 2013. http://hdl.handle.net/2263/37353.

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Livres sur le sujet "Asymmetric profiles"

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Craig, Ken. Computational study of the aerodynamics and control by blowing of asymmetric vortical flows over Delta wings. Stanford, Calif : Stanford University, Dept. of Aeronautics and Astronautics, 1991.

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Craig, Ken. Computational study of the aerodynamics and control by blowing of asymmetric vortical flows over Delta wings. Stanford, Calif : Stanford University, Dept. of Aeronautics and Astronautics, 1991.

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(Editor), Barry R. Schneider, et Jerrold M. Post (Editor), dir. Know Thy Enemy : Profiles of Adversary Leaders and Their Strategic Cultures. 2e éd. US Government Printing Office, 2004.

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4

Ajayi, Adebayo Akinola. Turbine Flowmeter signal analysis : Spectral analysis of turbine flowmeter pulse trains and local line pressures to defect rotor faults, pulsating and two-phase flows, and asymmetric velocity profiles. Bradford, 1988.

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Kinematic profiles of the hands in a bimanual task : A study in movement asymmetry. 1985.

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Kinematic profiles of the hands in a bimanual task : A study in movement asymmetry. 1986.

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Homburg, Stefan. Net Worth. Oxford University Press, 2017. http://dx.doi.org/10.1093/oso/9780198807537.003.0005.

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Chapter 5 focuses on producers’ net worth. It joins a large strand rooted in the financial literature, which points out that under asymmetric information, producers need own equity to obtain credit. Incorporating this assumption yields scenarios with endogenous borrowing limits and shows that small variations in credit requirements have large macroeconomic consequences. A second theme concerns an unresolved problem of general equilibrium models. These determine equilibrium prices from decisions of producers and consumers who are ostensibly aware only of market prices and their own characteristics, i.e., technologies and preferences. However, consumers must also know current profits because these enter their budget constraints. As profits are determined in equilibrium, a logical circle emerges. Stock manias can be interpreted as situations where consumers overestimate profits; conversely, stock market crashes may reflect underestimations of profits. The text shows that misguided profit expectations as such do not have the expected impacts on economic activity.
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Zeitlin, Vladimir. Instabilities in Cylindrical Geometry : Vortices and Laboratory Flows. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780198804338.003.0011.

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Vortex solutions in cyclo-geostrophic equilibrium are described and their geostrophic and ageostrophic barotropic and baroclinic instabilities are studied along the lines of Chapter 10. Special attention is paid to centrifugal instability which, as the inertial instability of jets, is due to modes trapped in the anticyclonic shear in the vortex, and has asymmetric counterparts. Saturation of this instability is shown to exhibit some specific patterns. Instabilities of intense hurricane-like vortices are analysed and shown to be sensitive to fine details of the vortex profile. Nonlinear saturation of such instabilities exhibits typical secondary meso-vortex structures, and leads to intensification of the vortex. Special attention is paid to instabilities in laboratory flows in rotating cylindrical channels. Classification of these instabilities is given, and their nature, in terms of resonances between different wave modes, is established. Rigid-lid and free-surface configuration with topography are considered and compared with experiments.
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Fiordelisi, Franco, Corrado Meglio, Carlo Palego, Annalissa Richetto, Artem Danko, Maurizio Vallino, Pasqualina Porretta, Lorenzo Bocchi, Carlo Toffano et Andrea Favretti. Pricing and risk adjusted measures. AIFIRM, 2021. http://dx.doi.org/10.47473/2016ppa00027.

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The issue of risk-based pricing of credit loans has become crucial for banking companies, in a context characterized by severe restriction of profitability margins also in relation to a level of market interest rates which in the Euro area is at its lowest. historical, now firmly in the negative area. The same European Authorities urge the adoption of adequate and consistent adjusted pricing frameworks with respect to the business model, risk profile and overall risk governance of the bank. The methodological and organizational process for determining the risk-adjusted pricing is further complicated by the ongoing Covid19 pandemic which, through the highly asymmetrical impacts on customer segments and industrial sectors, makes the forward-looking and macroeconomic assessment of the sectors risk even more relevant.
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Roberts, Anthea. Comparing International Law Academics. Oxford University Press, 2017. http://dx.doi.org/10.1093/oso/9780190696412.003.0003.

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This chapter identifies and explores some of the nationalizing, denationalizing, and westernizing influences that reflect and reinforce the divisible college of international lawyers. Part I focuses on transnational flows of student and materials, which provide a template for understanding some of the asymmetries that characterize the field. Students are more likely to move from peripheral and semiperipheral states toward core states, and from non-Western states to Western ones, than the reverse. Legal concepts and materials, like textbooks and case law, are more likely to move from core states to peripheral and semiperipheral ones, and from Western states to non-Western ones, than vice versa. Parts II, III, and IV then look at how the educational profiles of international law academics in different states, their publication placements, and their connections to practice reflect and reinforce certain forms of difference and dominance that help to structure international law as a transnational legal field.
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Chapitres de livres sur le sujet "Asymmetric profiles"

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Ilinykh, Andrey, Andrey Romanov et Inna Parahnenko. « Principles of Designing Asymmetric Rail Profiles ». Dans Lecture Notes in Networks and Systems, 51–60. Cham : Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-031-11051-1_5.

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Grittner, N., M. Engelhardt, B. Striewe, A. von Hehl, C. Klose et F. Nürnberger. « Characterization of the Interface of Co-Extruded Asymmetric Aluminum-Titanium Composite Profiles ». Dans Advanced Composites for Aerospace, Marine, and Land Applications II, 29–37. Hoboken, NJ, USA : John Wiley & Sons, Inc., 2015. http://dx.doi.org/10.1002/9781119093213.ch3.

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Grittner, N., M. Engelhardt, B. Striewe, A. von Hehl, C. Klose et F. Nürnberger. « Characterization of the Interface of Co-Extruded Asymmetric Aluminum-Titanium Composite Profiles ». Dans Advanced Composites for Aerospace, Marine, and Land Applications II, 29–37. Cham : Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-48141-8_3.

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Plamondon, Réjean. « On the Origin of Asymmetric Bell-Shaped Velocity Profiles in Rapid-Aimed Movements ». Dans Tutorials in Motor Neuroscience, 283–95. Dordrecht : Springer Netherlands, 1991. http://dx.doi.org/10.1007/978-94-011-3626-6_23.

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Heimes, N., J. Uhe, S. E. Thürer, H. Wester, H. J. Maier, C. Klose et B. A. Behrens. « Numerical Development of a Tooling System for the Co-extrusion of Asymmetric Compound Profiles on a Laboratory Scale ». Dans Lecture Notes in Production Engineering, 66–75. Berlin, Heidelberg : Springer Berlin Heidelberg, 2020. http://dx.doi.org/10.1007/978-3-662-62138-7_7.

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Andersen, David R., et Matthew A. Bershady. « GLOBAL LINE PROFILE ASYMMETRIES IN DISK GALAXIES ». Dans ISLAND UNIVERSES, 359–62. Dordrecht : Springer Netherlands, 2007. http://dx.doi.org/10.1007/978-1-4020-5573-7_61.

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Monazzah, Amir Mahdi Hosseini, Amir M. Rahmani, Antonio Miele et Nikil Dutt. « Exploiting Memory Resilience for Emerging Technologies : An Energy-Aware Resilience Exemplar for STT-RAM Memories ». Dans Dependable Embedded Systems, 505–26. Cham : Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-52017-5_21.

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AbstractDue to the consistent pressing quest of larger on-chip memories and caches of multicore and manycore architectures, Spin Transfer Torque Magnetic RAM (STT-MRAM or STT-RAM) has been proposed as a promising technology to replace classical SRAMs in near-future devices. Main advantages of STT-RAMs are a considerably higher transistor density and a negligible leakage power compared with SRAM technology. However, the drawback of this technology is the high probability of errors occurring especially in write operations. Such errors are asymmetric and transition-dependent, where 0 → 1 is the most critical one, and is high subjected to the amount and current (voltage) supplied to the memory during the write operation. As a consequence, STT-RAMs present an intrinsic trade-off between energy consumption vs. reliability that needs to be properly tuned w.r.t. the currently running application and its reliability requirement. This chapter proposes FlexRel, an energy-aware reliability improvement architectural scheme for STT-RAM cache memories. FlexRel considers a memory architecture provided with Error Correction Codes (ECCs) and a custom current regulator for the various cache ways and conducts a trade-off between reliability and energy consumption. FlexRel cache controller dynamically profiles the number of 0 → 1 transitions of each individual bit write operation in a cache block and based on that selects the most-suitable cache way and current level to guarantee the necessary error rate threshold (in terms of occurred write errors) while minimizing the energy consumption. We experimentally evaluated the efficiency of FlexRel against the most efficient uniform protection scheme from reliability, energy, area, and performance perspectives. Experimental simulations performed by using gem5 has demonstrated that while FlexRel satisfies the given error rate threshold, it delivers up to 13.2% energy saving. From the area footprint perspective, FlexRel delivers up to 7.9% cache ways’ area saving. Furthermore, the performance overhead of the FlexRel algorithm which changes the traffic patterns of the cache ways during the executions is 1.7%, on average.
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Kumar, Thadagoni Pranay, MD Rehana et CH Ramakrishna. « A Low Profile Double Notched UWB Antenna with Asymmetric Coplanar Strip for Wireless Applications ». Dans Proceedings of Second International Conference on Computational Electronics for Wireless Communications, 21–30. Singapore : Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-19-6661-3_3.

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Flack, Kenneth, Luis A. Jimenez et Wenwan Zhong. « Analysis of the Distribution Profiles of Circulating MicroRNAs by Asymmetrical Flow Field Flow Fractionation ». Dans Methods in Molecular Biology, 161–68. New York, NY : Springer New York, 2016. http://dx.doi.org/10.1007/978-1-4939-6524-3_15.

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Dosi, Cesare, et Michele Moretto. « Nonpoint-Source Pollution Control, Information Asymmetry, and the Choice of Time Profile for Environmental Fees ». Dans Theory, Modeling and Experience in the Management of Nonpoint-Source Pollution, 91–121. Boston, MA : Springer US, 1993. http://dx.doi.org/10.1007/978-1-4615-3156-2_4.

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Actes de conférences sur le sujet "Asymmetric profiles"

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Sorge, Stefan. « Simulation of shifted and asymmetric hydrogen line profiles ». Dans The 15th international conference on spectral line shapes. AIP, 2001. http://dx.doi.org/10.1063/1.1370599.

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Devendran, Ram Sudarsan, et Andrea Vacca. « Design Potentials of External Gear Machines With Asymmetric Tooth Profile ». Dans ASME/BATH 2013 Symposium on Fluid Power and Motion Control. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/fpmc2013-4473.

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This paper describes the design, optimization and the performance potentials of external gear machines with asymmetric tooth profiles. Conventionally, the design of these machines is entirely based on symmetric involute profile. A design method has been developed to derive the tooth profiles based on a modified rack-cutter profile which is assumed to be used for manufacturing the gears with asymmetric involute surfaces and trochoidal fillet profiles. The study is based on the simulation tool HYGESim (HYdraulic GEar machines Simulator) which is being developed and has been validated by the authors’ research group to accurately analyze the performance of the machine. For the purpose of this research, HYGESim was adapted to simulate the particular case of non-symmetric gear profiles. A specific optimization procedure based on genetic algorithm was implemented to find the maximum performance of the new design, in terms of volumetric efficiency, fluid borne noise, internal pressure peaks and localized cavitation acting on the design parameters that characterize the tooth profile. The results of the optimization process are compared to the current state of the art for external gear machines. This comparison show very high potentials for this new design principle, particularly concerning the reduction of the fluid borne noise.
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Günter, Sibylle, et Axel Könies. « Shifted and asymmetric profiles of hydrogen and hydrogenic ion lines ». Dans The 13th international conference on spectral line shapes. AIP, 1997. http://dx.doi.org/10.1063/1.51823.

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Sanders, Aaron, Donald R. Houser, Ahmet Kahraman, Jonny Harianto et Sam Shon. « An Experimental Investigation of the Effect of Tooth Asymmetry and Tooth Root Shape on Root Stresses and Single Tooth Bending Fatigue Life of Gear Teeth ». Dans ASME 2011 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2011. http://dx.doi.org/10.1115/detc2011-48303.

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In this paper, effects of root fillet geometry and tooth asymmetry on tooth bending stresses and fatigue lives of spur gears are investigated. For this purpose, an existing gear analysis model, the Load Distribution Program (LDP), is employed to define four basic tooth geometry variations. These four variations are (i) symmetric tooth profiles (i.e. identical loaded and unloaded flanks) with full circular root geometry (at the maximum radius possible), (ii) symmetric tooth profiles with an elliptical root geometry, (iii) asymmetric tooth profiles (i.e. loaded and unloaded flanks at different pressure angles) with full circular root geometries, and (iv) asymmetric tooth profiles with an elliptical root geometry on the right (loaded) flank and a circular root geometry on the left flank. Under these conditions, variations (ii), (iii), and (iv) are predicted to have maximum root stresses that are 7.6%, 22.4%, and 24.3% less than that of the baseline case (i). Actual test articles representing these four variations were qualified through dimensional measurements of the profiles and the root fillet regions. The roots of several of the teeth of each gear type were instrumented and strain measurements under various tooth load levels are compared with the predictions. Single tooth bending fatigue tests were also performed to obtain fatigue data for each variation of the test gears. The resultant tooth bending fatigue performance of each gear variation is shown to correlate with the level of root stress reduction achieved. Experiments indicate that the most significant life increases compared to the baseline conditions are achieved with the last variation (asymmetric tooth profiles and an elliptical root shape), where the mean life is increased by more than 30 times. It is also shown through examination of the broken teeth that the critical locations where the cracks initiated agree well with the predicted locations of the maximum root stresses.
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Ding, Y., et R. Magnusson. « Polarization independent resonant bandstop filters using 1D periodic layers with asymmetric profiles ». Dans Diffractive Optics and Micro-Optics. Washington, D.C. : OSA, 2004. http://dx.doi.org/10.1364/domo.2004.dtuc5.

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Ding, Y., et R. Magnusson. « Semianalytical Formulation of Leaky-mode Resonance in Periodic Elements with Asymmetric Profiles ». Dans Nanophotonics. Washington, D.C. : OSA, 2006. http://dx.doi.org/10.1364/nano.2006.ntha3.

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Inguva, Ramarao, Jagdish Rai et C. M. Bowden. « Asymmetric modes in nonlinear multilayered waveguides ». Dans OSA Annual Meeting. Washington, D.C. : Optica Publishing Group, 1989. http://dx.doi.org/10.1364/oam.1989.fh4.

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We consider the nature of modes in a multilayered guide with a linear core surrounded by nonlinear cladding layers. Neglecting transverse effects we show that a class of asymmetric modes characteristic of nonlinearities of cladding layers can exist in the guide. Absorption1 is included in the analysis. Explicit numerical results with field profiles are presented. It is found that these modes require a threshold flux density for the waves to propagate. The stability1 of these modes with respect to propagation in the guides is investigated. Potential uses are indicated.
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Hartmann, S., T. Nagel, T. Rauch, K. Werner, Klaus Werner et T. Rauch. « Asymmetric Line Profiles in Spectra of Gaseous Metal Disks Around Single White Dwarfs ». Dans 17TH EUROPEAN WHITE DWARF WORKSHOP. AIP, 2010. http://dx.doi.org/10.1063/1.3527868.

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Cvetanov, Genadi, Tsanko Karadzhov et Rosica Miteva. « Basic law of the flat interlocking of involute cylindrical gears with asymmetric profiles ». Dans THERMOPHYSICAL BASIS OF ENERGY TECHNOLOGIES (TBET 2020). AIP Publishing, 2021. http://dx.doi.org/10.1063/5.0042513.

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Hartmann, Stephan, Thorsten Nagel, Thomas Rauch et Klaus Werner. « Asymmetric Line Profiles in Spectra of Gaseous Metal Disks around Single White Dwarfs ». Dans PLANETARY SYSTEMS BEYOND THE MAIN SEQUENCE : Proceedings of the International Conference. AIP, 2011. http://dx.doi.org/10.1063/1.3556204.

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Rapports d'organisations sur le sujet "Asymmetric profiles"

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Nam, C. H., W. Tighe, S. Suckewer, J. F. Seely, U. Feldman et L. A. Woltz. Observation of asymmetric Stark profiles from plasmas created by a picosecond KrF laser. Office of Scientific and Technical Information (OSTI), octobre 1987. http://dx.doi.org/10.2172/5924670.

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Wilson, D., Michael Shaw, Vladimir Ostashev, Michael Muhlestein, Ross Alter, Michelle Swearingen et Sarah McComas. Numerical modeling of mesoscale infrasound propagation in the Arctic. Engineer Research and Development Center (U.S.), octobre 2022. http://dx.doi.org/10.21079/11681/45788.

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The impacts of characteristic weather events and seasonal patterns on infrasound propagation in the Arctic region are simulated numerically. The methodology utilizes wide-angle parabolic equation methods for a windy atmosphere with inputs provided by radiosonde observations and a high-resolution reanalysis of Arctic weather. The calculations involve horizontal distances up to 200 km for which interactions with the troposphere and lower stratosphere dominate. Among the events examined are two sudden stratospheric warmings, which are found to weaken upward refraction by temperature gradients while creating strongly asymmetric refraction from disturbances to the circumpolar winds. Also examined are polar low events, which are found to enhance negative temperature gradients in the troposphere and thus lead to strong upward refraction. Smaller-scale and topographically driven phenomena, such as low-level jets, katabatic winds, and surface-based temperature inversions, are found to create frequent surface-based ducting out to 100 km. The simulations suggest that horizontal variations in the atmospheric profiles, in response to changing topography and surface property transitions, such as ice boundaries, play an important role in the propagation.
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Hudson, Austin, Hans Moritz et Jarod Norton. Sediment mobility, closure depth, and the littoral system – Oregon and Washington coast. Engineer Research and Development Center (U.S.), septembre 2022. http://dx.doi.org/10.21079/11681/45346.

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Forty years ago, the depth of closure concept was introduced to provide a systematic, process-based approach to evaluate seasonal changes in cross-shore profiles and sediment mobility in the nearshore. This study aims to extend that theory by directly considering wave-asymmetry in the nearshore environment. This technical note introduces a methodology to calculate wave induced dispersal of dredged material placed in nearshore sites and summarizes analyses validating the approach using data from the South Jetty Site at the Mouth of the Columbia River. This investigation highlights the notion of a cross-shore gradient in nearshore placement effectiveness of dredged material that can assist project managers plan and execute sustainable sediment management practices at coastal inlets.
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Megersa, Kelbesa. Tax Transparency for an Effective Tax System. Institute of Development Studies (IDS), janvier 2021. http://dx.doi.org/10.19088/k4d.2021.070.

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This rapid review examines evidence on the transparency in the tax system and its benefits; e.g. rising revenue, strengthen citizen/state relationship, and rule of law. Improvements in tax transparency can help in strengthening public finances in developing countries that are adversely affected by COVID-19. The current context (i.e. a global pandemic, widespread economic slowdown/recessions, and declining tax revenues) engenders the urgency of improving domestic resource mobilisation (DRM) and the fight against illicit financial flows (IFFs). Even before the advent of COVID-19, developing countries’ tax systems were facing several challenges, including weak tax administrations, low taxpayer morale and “hard-to-tax” sectors. The presence of informational asymmetry (i.e. low tax transparency) between taxpayers and tax authorities generates loopholes for abuse of the tax system. It allows the hiding of wealth abroad with a limited risk of being caught. Cases of such behaviour that are exposed without proper penalty may result in a decline in the morale of citizens and a lower level of voluntary compliance with tax legislation. A number of high-profile tax leaks and scandals have undermined public confidence in the fairness of tax systems and generated a strong demand for effective counteraction and tax transparency. One of the key contributing factors to lower tax revenues in developing countries (that is linked to low tax transparency) is a high level of IFFs. These flows, including international tax evasion and the laundering of corruption proceeds, build a major obstacle to successful DRM efforts. Research has also identified an association between organisational transparency (e.g. transparency by businesses and tax authorities) and stakeholder trust (e.g. between citizens and the state). However, the evidence is mixed as to how transparency in particular influences trust and perceptions of trustworthiness.
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Structure Peculiarities of Visual Caused Potentials of Female Athletes With Individual Profile of Asymmetry. Alexsandr M. Mendzheritskiy, M.E. Aydarkina, G.V. Karantysh, Larisa M. Dmitrenko, septembre 2016. http://dx.doi.org/10.14526/01_1111_140.

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