Academic literature on the topic 'Fluctuating and directional asymmetries'

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the lists of relevant articles, books, theses, conference reports, and other scholarly sources on the topic 'Fluctuating and directional asymmetries.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Journal articles on the topic "Fluctuating and directional asymmetries"

1

Ten Broek, Clara, Liliane Wijnaendts, Frietson Galis, and Stefan Van Dongen. "Human fetuses and limb asymmetry: No evidence for directional asymmetry and support for fluctuating asymmetry as a measure of developmental instability." Animal Biology 60, no. 2 (2010): 169–82. http://dx.doi.org/10.1163/157075610x491716.

Full text
Abstract:
AbstractThe often observed directional asymmetry in human limb bones could have a genetic basis. Alternatively, differences in limbs across sides could emerge from different mechanical loadings on the left and right side as a result of behavioral lateralization. Because handedness in itself has a genetic basis, it has been suggested that directional asymmetry in limbs could develop prenatally as a pre-adaptation to adult life. The developmental origins of limb asymmetry and the presence of directional asymmetry have important implications for the use of directionally random asymmetry (i.e., fl
APA, Harvard, Vancouver, ISO, and other styles
2

Spani, Federica, and Massimiliano Scalici. "Carapace asymmetries in crabs." Crustaceana 91, no. 11 (2018): 1281–90. http://dx.doi.org/10.1163/15685403-00003835.

Full text
Abstract:
Abstract Through the geometric morphometric approach of the landmark-based method applied on adult right-handed specimens of Carcinus aestuarii, Liocarcinus depurator and Potamon fluviatile, statistical analyses showed significant outcomes for fluctuating asymmetry in the three studied species, and directional asymmetry only in P. fluviatile (that showed a less convex carapace shape on the right side, where larger chela occurred). Although these findings may be correlated to some environmental constraints, such as soil composition, refuge occurrence and predatory pressure, also other interpret
APA, Harvard, Vancouver, ISO, and other styles
3

Legay, Jean-Marie. "Biométrie et symétrie des inflorescences de charme." Canadian Journal of Botany 67, no. 11 (1989): 3199–204. http://dx.doi.org/10.1139/b89-399.

Full text
Abstract:
The studied area concerns the inflorescence of the yoke elm, Carpinus betulus, and especially the lobes of the involucre surrounding the fruit for groups of two flowers, which form these inflorescences. Data come from three natural populations, geographically distinct. Two fluctuating asymmetries and two directional asymmetries are noted in the system. Their characteristics and the relations between them are examined. The interpretation takes into account the ontogenesis of the flower structure and leads to a discrimination between populations.
APA, Harvard, Vancouver, ISO, and other styles
4

Faure, P. A., and R. R. Hoy. "Auditory symmetry analysis." Journal of Experimental Biology 203, no. 21 (2000): 3209–23. http://dx.doi.org/10.1242/jeb.203.21.3209.

Full text
Abstract:
The study of biological symmetry continues to be an important and active area of research, yet in the hearing sciences there are no established quantitative methods for measuring auditory asymmetries and dissimilarities in threshold tuning curves (i.e. audiograms). Using a paired design and adopting methods from the analysis of fluctuating asymmetry, we describe methods for auditory researchers interested in delineating auditory asymmetries and comparing tuning curves, behavioral or neural. We illustrate the methods using audiograms of the prothoracic T-cell interneuron in a nocturnal katydid
APA, Harvard, Vancouver, ISO, and other styles
5

Otero, Liliana, Luis Bermudez, Karina Lizarraga, Irene Tangco, Rocelyn Gannaban, and Daniel Meles. "A Comparative Study of Facial Asymmetry in Philippine, Colombian, and Ethiopian Families with Nonsyndromic Cleft Lip Palate." Plastic Surgery International 2012 (October 24, 2012): 1–6. http://dx.doi.org/10.1155/2012/580769.

Full text
Abstract:
Objective. To compare the asymmetry displayed by Philippine, Colombian, and Ethiopian unaffected parents of patients with nonsyndromic cleft palate (NSCLP) and a control population. Methods. Facial measurements were compared between unaffected parents of NSCLP patients and those in the control group for three populations from South America, Asia, and Africa by anthropometric and photographic measurements. Fluctuating and directional asymmetries, height and width proportions, were analyzed and compared. Results. Fluctuating asymmetries (ear length, middle line to Zigion perpendicular for left a
APA, Harvard, Vancouver, ISO, and other styles
6

Pither, Jason, and Philip D. Taylor. "Directional and fluctuating asymmetry in the black-winged damselfly Calopteryx maculata (Beauvois) (Odonata: Calopterygidae)." Canadian Journal of Zoology 78, no. 10 (2000): 1740–48. http://dx.doi.org/10.1139/z00-130.

Full text
Abstract:
Directional asymmetry (DA) has received considerably less attention than fluctuating asymmetry (FA) in the literature. Evidence for DA, however, is building among insect taxa. We examined asymmetries in two wing traits within both sexes of the damselfly Calopteryx maculata (Beauvois) (Odonata: Calopterygidae) sampled from three sites in southeastern Ontario. After accounting for measurement error, we show that proximal segments within right fore and hind wings are consistently longer than those in the left in all but one sample group. Full wing lengths, however, exhibited FA rather than DA. Me
APA, Harvard, Vancouver, ISO, and other styles
7

Parés-Casanova, Pere M., Kirian Narcís Jones Capdevila, and Laura Castel Mas. "Hindlimb lateral and medial acropodial series of cattle are uneven in form." Revista de Ciências Agroveterinárias 19, no. 4 (2020): 468–73. http://dx.doi.org/10.5965/223811711942020468.

Full text
Abstract:
In bovines, fore and hind lateral claws are larger than the medial claws and the heel are deeper and the sole thicker. On this anatomical basis, we hypothesized that it must imply a form (size+shape) asymmetry of the digits. To test this hypothesis, we studied the acropodiums (digital series) of 15 young bovines belonging to Brown Pyrenean breed, irrespective of the gender. Dorso-plantar radiographies were obtained for each hindlimb and the form was studied in a sample of 30 hindlimbs (15 right and 15 left). Images were studied by geometric morphometric methods. A set of 7 paired landmarks on
APA, Harvard, Vancouver, ISO, and other styles
8

Parés-Casanova, Pere M., Pinzón Brando, Daniel Caviedes, and Arcesio Salamanca-Carreño. "Scutation asymmetries in red-footed tortoise Chelonoidis carbonaria Spix, 1824 (Testudines: Testudinidae)." Papéis Avulsos de Zoologia 60 (August 28, 2020): e20206039. http://dx.doi.org/10.11606/1807-0205/2020.60.39.

Full text
Abstract:
The ability of an individual to withstand random perturbations during its development is considered a good indicator of environmental and genetic stress. A common means of assessing developmental stability is through analysis of fluctuating asymmetry (FA) in bilateral traits. Tortoises, with their large, solid plastron, allow for measurement of body geometry. Their bilateral shell scutes are ideal candidates for asymmetries researches. With this issue in mind we assessed, as a preliminary study, levels of plastron scute asymmetry in a sample of 46 red-footed tortoise Chelonoidis carbonaria fro
APA, Harvard, Vancouver, ISO, and other styles
9

Schmidt, Dominik, and Katrin Kahlen. "Towards More Realistic Leaf Shapes in Functional-Structural Plant Models." Symmetry 10, no. 7 (2018): 278. http://dx.doi.org/10.3390/sym10070278.

Full text
Abstract:
Fluctuating asymmetry in plant leaves is a widely used measure in geometric morphometrics for assessing random deviations from perfect symmetry. In this study, we considered the concept of fluctuating asymmetry to improve the prototype leaf shape of the functional-structural plant model L-Cucumber. The overall objective was to provide a realistic geometric representation of the leaves for the light sensitive plant reactions in the virtual plant model. Based on three-dimensional data from several hundred in situ digitized cucumber leaves comparisons of model leaves and measurements were conduct
APA, Harvard, Vancouver, ISO, and other styles
10

Balzeau, Antoine, Lou Ball-Albessard, and Anna Maria Kubicka. "Variation and Correlations in Departures from Symmetry of Brain Torque, Humeral Morphology and Handedness in an Archaeological Sample of Homo sapiens." Symmetry 12, no. 3 (2020): 432. http://dx.doi.org/10.3390/sym12030432.

Full text
Abstract:
The anatomical asymmetries of the human brain are the subject of a great deal of scientific interest because of their links with handedness and lateralized cognitive functions. Information about lateralization in humans is also available from the post-cranial skeleton, particularly the arm bones, in which differences in size and shape are related to hand/arm preference. Our objective here is to characterize the possible correlations between the endocranial and post-cranial asymmetries of an archaeological sample. This, in turn, will allow us to try to identify and interpret prospective functio
APA, Harvard, Vancouver, ISO, and other styles
More sources

Dissertations / Theses on the topic "Fluctuating and directional asymmetries"

1

Partiot, Caroline. "Diversité biologique des enfants décédés en période périnatale et traitements funéraires au Kerma classique : Les exemples de la nécropole 8B-51 (Kerma classique, Nord Soudan) et des cimetières de Blandy-les-Tours (Xe-XIIe siècle, France) et de Provins (XIIIe-XVIIIe siècle, France)." Thesis, Bordeaux, 2018. http://www.theses.fr/2018BORD0252/document.

Full text
Abstract:
En dépit des taux élevés de mortalité infantile dans les populations du passé, les sujets décédés en période périnatale ont longtemps été délaissés dans les travaux anthropologiques et paléoanthropologiques. Alors que les analyses biologiques portant sur les individus adultes intègrent l’étude de la variabilité comme une composante majeure, rares sont celles permettant de replacer un individu décédé en période périnatale dans le cadre de la variabilité individuelle ou populationnelle de cette classe d’âge. Le présent travail se propose ainsi d’investir le sujet de la diversité métrique et non-
APA, Harvard, Vancouver, ISO, and other styles
2

Storm, Rebecca Alyson. "Human skeletal asymmetry : a study of directional and fluctuating asymmetry in assessing health, environmental conditions, and social status in English populations from the 7th to the 19th centuries." Thesis, University of Bradford, 2009. http://hdl.handle.net/10454/4325.

Full text
Abstract:
Asymmetry is a useful tool for osteological analysis as it detects disruptions in the developmental stability of osseous structures attributed to environmental and biomechanical environments. The primary aim of this study is to establish a baseline for normal levels of asymmetry in English archaeological populations in order to distinguish between normal population variation and increased developmental instability or biomechanical stress. Directional and fluctuating asymmetry is assessed through a database of a comprehensive selection of osteological measurements throughout the skeletons of 17
APA, Harvard, Vancouver, ISO, and other styles
3

Storm, Rebecca A. "Human skeletal asymmetry. A study of directional and fluctuating asymmetry in assessing health, environmental conditions, and social status in English populations from the 7th to the 19th centuries." Thesis, University of Bradford, 2009. http://hdl.handle.net/10454/4325.

Full text
Abstract:
Volume 1 = Thesis, Volume 2 = Appendices<br>Asymmetry is a useful tool for osteological analysis as it detects disruptions in the developmental stability of osseous structures attributed to environmental and biomechanical environments. The primary aim of this study is to establish a baseline for normal levels of asymmetry in English archaeological populations in order to distinguish between normal population variation and increased developmental instability or biomechanical stress. Directional and fluctuating asymmetry is assessed through a database of a comprehensive selection of osteological
APA, Harvard, Vancouver, ISO, and other styles
4

Tanaka, Masaki. "Latency of Saccades during Smooth Pursuit Eye Movement in Man : directional asymmetries." Doctoral thesis, 1998. http://hdl.handle.net/2115/32627.

Full text
APA, Harvard, Vancouver, ISO, and other styles

Books on the topic "Fluctuating and directional asymmetries"

1

An Investigation into the Effects of Lateral Aerodynamic Asymmetries, Lateral Weight Asymmetries, and Differential Stabilator Bias on the F-15 Directional Flight Characteristics at High Angles of Attack. Storming Media, 1996.

Find full text
APA, Harvard, Vancouver, ISO, and other styles

Book chapters on the topic "Fluctuating and directional asymmetries"

1

Siewierska, Anna, and Dik Bakker. "Bi-directional vs. uni-directional asymmetries in the encoding of semantic distinctions in free and bound person forms." In Studies in Language Companion Series. John Benjamins Publishing Company, 2006. http://dx.doi.org/10.1075/slcs.76.03sie.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Steele, James. "When did Directional Asymmetry Enter the Record?" In The Speciation of Modern Homo Sapiens. British Academy, 2004. http://dx.doi.org/10.5871/bacad/9780197263112.003.0009.

Full text
Abstract:
This chapter reviews evidence for the evolution of primate asymmetries in brain morphology and in behaviour, including the fossil and archaeological record of human evolution. This evidence suggests that, while morphological asymmetries are conserved features of the human brain, human functional asymmetries are derived, at least in their degree and consistency. The discussion offers a partial explanation that takes account of allometric scaling in the evolution of brain size, neocortex size, and intra- and interhemispheric connectivity.
APA, Harvard, Vancouver, ISO, and other styles
3

"Directional asymmetries in cognition: What is left to write about?" In Spatial Dimensions of Social Thought. De Gruyter Mouton, 2011. http://dx.doi.org/10.1515/9783110254310.189.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Talbayev, Edwige Tamalet. "Abdelkébir Khatibi’s Mediterranean Idiom." In Abdelkébir Khatibi. Liverpool University Press, 2020. http://dx.doi.org/10.3828/liverpool/9781789622331.003.0004.

Full text
Abstract:
Through its focus on decolonization, Abdelkébir Khatibi’s oeuvre has revealed the Maghreb’s intrinsic plurality—a legacy of intercultural contact that encompasses, yet extends beyond, the trauma of European colonialism. Drawing on the fluctuating principle of the Mediterranean as method, this chapter extends the purview of Khatibi’s “double critique” of any stable concept of origins to include other moments of trans-Mediterranean contact between the Maghreb and the West—moments preceding the watershed of colonialism and conveying other logics of interaction than European domination. Khatibi has written that his core concept of bi-langue functions as a means “to enter into the telling of forgetting and of anamnesia […] ‘I am an/other’ i[s] an idiom that I owe it to myself to invent” (“Diglossia” 158). This chapter probes the form that this anamnestic idiom is to take, beyond Manichean visions of being and belonging, in the density of the Maghreb’s marge en éveil—as the point of inception of a transcultural heuristic tethered to the contiguous space of the Mediterranean Sea and its manifold, multi-directional histories. In the vertiginous space of the interlangue (the point of contact between two languages, here conceived as “the space between two exteriorities” [ibid.]), the revised conception of bi-langue that this chapter proposes concerns itself with the resurrection of an alternative, deep-rooted idiom, one incommensurable to the languages in which writing occurs. This post-traumatic, Mediterranean form of expression moves beyond melancholia to open the bi-langue to the pluri-langue and disseminate it beyond the strictures of the colonial relation. By taking account of the “historical churning of between people, between civilizations” (ibid.) in the embracing space of the Mediterranean, this discourse gives shape to a revivified Maghrebi memory in all its sedimented density.
APA, Harvard, Vancouver, ISO, and other styles

Conference papers on the topic "Fluctuating and directional asymmetries"

1

Masuda, Shigeaki, Rei Takagi, Kouhei Okada, and Shinnosuke Obi. "Asymmetry and Unsteadiness of Incipient Separation of Nominally Axisymmetric Turbulent Boundary Layer." In ASME/JSME 2003 4th Joint Fluids Summer Engineering Conference. ASMEDC, 2003. http://dx.doi.org/10.1115/fedsm2003-45587.

Full text
Abstract:
Unsteady and asymmetric behavior of separation of nominally axisymmetric and steady turbulent boundary layer in an axisymmetric expansion is investigated. The test diffusers have the total divergence angle from 8 to 50deg and length-to-diameter ratio of 8. Bulk Reynolds number is ranging between 2.5 × 104 and 2.4 × 105. The wall static pressure fluctuation increases monotonically with increasing divergence angle up to 25° and then decreases. The wall static pressure exhibits large scale law frequency fluctuations, occurring almost concurrently in the entire passage. Distributions of both mean
APA, Harvard, Vancouver, ISO, and other styles
2

Sun, Tianrui, Anping Hou, Mingming Zhang, Yonghong Niu, Jian Gao, and Haoyan Guo. "Analysis on the Reduction of Rotor Blade Vibration Using Asymmetric Vane Spacing." In ASME Turbo Expo 2015: Turbine Technical Conference and Exposition. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/gt2015-42778.

Full text
Abstract:
Asymmetric vane spacing design has drawn the attention of many researchers as a targeted and potential method of controlling the blade forced response. In this paper, we studied the influence of asymmetric stator vane spacing variation on the reduction of downstream rotor blade vibration. We use a simplified method to calculate the aerodynamic force on the rotor blade surface. To validate the accuracy of the simplified method and to calculate rotor blade vibration response under asymmetric aerodynamic load, a transient analytical fluid-structure interaction method was applied. In this paper, w
APA, Harvard, Vancouver, ISO, and other styles
3

Miner, S. M., R. D. Flack, and P. Trevisan. "Potential Flow Analysis of the Forces on a Laboratory Centrifugal Pump Impeller." In ASME 1992 International Gas Turbine and Aeroengine Congress and Exposition. American Society of Mechanical Engineers, 1992. http://dx.doi.org/10.1115/92-gt-285.

Full text
Abstract:
Two dimensional potential flow was used to determine the pressure field in a laboratory centrifugal pump. The impeller and volute were modeled simultaneously, using the finite element technique. Simulation of impeller rotation was accomplished by generating steady state solutions with the impeller in 10 different angular orientations within the volute. As a result, the interaction between the impeller and volute developed naturally as a result of the solution. Model results showed that blade pressure profiles were asymmetric, even at design flow. These asymmetries were even more pronounced at
APA, Harvard, Vancouver, ISO, and other styles
4

Takahashi, Shiro, Yuichi Narumi, Kiyoshi Ishihama, et al. "Analytical Evaluation of Unsteady Thermal Hydraulic Characteristics in Shell and Tube Heat Exchangers." In 14th International Conference on Nuclear Engineering. ASMEDC, 2006. http://dx.doi.org/10.1115/icone14-89389.

Full text
Abstract:
Many shell &amp; tube heat exchangers are used in nuclear power plants. Unsteady thermal hydraulic phenomena have been studied in shell &amp; tube heat exchangers to improve their safety and reliability and to extend their lifetime based on experience obtained from long periods of plant operation. We investigated unsteady flow in shell &amp; tube heat exchangers by using computational fluid dynamics (CFD) analyses. The inlet flow on the shell side was separated and flow in several directions. A large part of the flow crossed over the tube bundle, and some parts of the flow took two circuitous
APA, Harvard, Vancouver, ISO, and other styles
5

Ho, Patrick, Hyunglae Lee, Mohammad A. Rastgaar, Hermano Igo Krebs, and Neville Hogan. "Interpretation of the Directional Properties of Voluntarily Modulated Human Ankle Mechanical Impedance." In ASME 2010 Dynamic Systems and Control Conference. ASMEDC, 2010. http://dx.doi.org/10.1115/dscc2010-4274.

Full text
Abstract:
This article presents the results of two in-vivo studies providing measurements of human static ankle mechanical impedance. Accurate measurements of ankle impedance when muscles were voluntarily activated were obtained using a therapeutic robot, Anklebot, and an electromyographic recording system. Important features of ankle impedance, and their variation with muscle activity, are discussed, including magnitude, symmetry and directions of minimum and maximum impedance. Voluntary muscle activation has a significant impact on ankle impedance, increasing it by up to a factor of three in our exper
APA, Harvard, Vancouver, ISO, and other styles
6

Wang, L. P., S. Basu, and Z. M. Zhang. "Direct and Indirect Methods for Calculating Thermal Emission From Layered Structures With Nonuniform Temperatures." In 2010 14th International Heat Transfer Conference. ASMEDC, 2010. http://dx.doi.org/10.1115/ihtc14-22499.

Full text
Abstract:
The determination of emissivity of layered structures is critical in many applications, such as radiation thermometry, microelectronics, radiative cooling, and energy harvesting. Two different approaches, i.e., the “indirect” and “direct” methods, are commonly used for computing the emissivity of an object. For an opaque surface at a uniform temperature, the indirect method involves calculating the spectral directional-hemispherical reflectance to deduce the spectral directional emissivity based on Kirchhoff’s law. On the other hand, a few studies have used a combination of Maxwell’s equations
APA, Harvard, Vancouver, ISO, and other styles
7

Moser, W. "An Analysis of Outlet Distortion in LP Steam Turbines." In ASME 1989 International Gas Turbine and Aeroengine Congress and Exposition. American Society of Mechanical Engineers, 1989. http://dx.doi.org/10.1115/89-gt-237.

Full text
Abstract:
In gas and steam turbines, outlet distortions may lead to vibrations of the rotor blades. In order to gain a deeper understanding of origin and intensity of the excitation mechanism, various distorted flow conditions caused by asymmetric exhaust or by ribs were investigated in radial and circumferential direction with the help of pneumatic probes. The periodic pressure fluctuations on the rotor blades, which are responsible for the excitation, were determined with miniature pressure transducers at temperatures of about 100 °C and centripetal accelerations of 65,000 g. The response of the blade
APA, Harvard, Vancouver, ISO, and other styles
8

Schobeiri, M. T., J. John, and K. Pappu. "Development of Two-Dimensional Wakes Within Curved Channels, Theoretical Framework and Experimental Investigation." In ASME 1994 International Gas Turbine and Aeroengine Congress and Exposition. American Society of Mechanical Engineers, 1994. http://dx.doi.org/10.1115/94-gt-367.

Full text
Abstract:
The development of a wake flow downstream of a cylindrical rod within a curved channel under zero streamwise pressure gradient is theoretically and experimentally investigated. The measured asymmetric wake quantities such as the mean velocity and turbulent fluctuations in longitudinal and lateral directions as well as the turbulent shear stress are transformed from the probe coordinate system into the curvilinear wake eigen-coordinate system. For the transformed non-dimensionalized velocity defect and the turbulent quantities, affine profiles are observed throughout the flow regime. Based on t
APA, Harvard, Vancouver, ISO, and other styles
9

Kumar, S. Satish, Dilipkumar Bhanudasji Alone, Shobhavathy M. Thimmaiah, et al. "Experimental Investigation of Unsteady Flow in a Transonic Uni-Stage Axial Compressor." In ASME 2014 Gas Turbine India Conference. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/gtindia2014-8167.

Full text
Abstract:
Detailed steady and unsteady experimental measurements and analysis were performed on a Single stage Transonic Axial Compressor with asymmetric rotor tip clearance for studying the compressor stall phenomena. The installed compressor had asymmetric tip clearance around the rotor casing varying from about 0.65mm to 1.25mm. A calibrated 5-hole aerodynamic probe was traversed radially at exit of rotor and showed the characteristics of increased flow angle at lower mass flow rates for all the speeds. Mach number distribution and boundary layer effects were also clearly captured. Unsteady measureme
APA, Harvard, Vancouver, ISO, and other styles
10

Grega, Lisa M., and Steven Voinier. "Effect of Inlet Flow Conditions on Flow Uniformity in a PEM Fuel Cell." In ASME 2011 9th International Conference on Fuel Cell Science, Engineering and Technology collocated with ASME 2011 5th International Conference on Energy Sustainability. ASMEDC, 2011. http://dx.doi.org/10.1115/fuelcell2011-54233.

Full text
Abstract:
The use of fuel cells as an alternative to traditional small scale power producing devices such as internal combustion engines or disposable batteries has continued to gain widespread acceptance. Flow maldistribution within cells in a stack continues to be an issue in fuel cell design and can adversely affect performance and longevity. Current research in this field has focused on effects of inlet configurations (plug flow versus circular inlet, for example) on the flow in a rectangular manifold and the resulting distribution into individual cells in the stack. In a typical small scale applica
APA, Harvard, Vancouver, ISO, and other styles
We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!