Готові списки джерел за темами / Right/left symmetry

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Добірка наукової літератури з теми "Right/left symmetry"

Автор: Grafiati
Опубліковано: 11 березня 2023

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Статті в журналах з теми "Right/left symmetry"

1

Gu, Pei-Hong. "Mirror left–right symmetry." Physics Letters B 713, no. 4-5 (July 2012): 485–89. http://dx.doi.org/10.1016/j.physletb.2012.06.042.

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2

Rosen, S. P. "OnZ4horizontal symmetry and left-right-symmetric theories." Physical Review D 31, no. 11 (June 1, 1985): 2952–57. http://dx.doi.org/10.1103/physrevd.31.2952.

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3

Ferdiyan, Akmal, Apriadi Salim Adam, and Mirza Satriawan. "The Left-Right Symmetry Breaking Mechanism for the New Left-Right Symmetry Model." JPSE (Journal of Physical Science and Engineering) 5, no. 1 (August 27, 2020): 1–5. http://dx.doi.org/10.17977/um024v5i12020p001.

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4

Shafaq, Saba, and Mariam Saleh Khan. "Left right symmetric model with additional family symmetry." Physics Essays 30, no. 2 (June 13, 2017): 161–67. http://dx.doi.org/10.4006/0836-1398-30.2.161.

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5

Akhmedov, Eugeni, Manfred Lindner, Erhard Schnapka, and Jose W. F. Valle. "Dynamical left-right symmetry breaking." Physical Review D 53, no. 5 (March 1, 1996): 2752–80. http://dx.doi.org/10.1103/physrevd.53.2752.

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6

MATUTE, ERNESTO A. "RESTORATION OF PARITY SYMMETRY THROUGH PRESYMMETRY." Modern Physics Letters A 26, no. 34 (November 10, 2011): 2579–85. http://dx.doi.org/10.1142/s0217732311036917.

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Presymmetry, the hidden symmetry underlying the charge and generational patterns of quarks and leptons, is utilized for repairing the left–right asymmetry of the standard model with Dirac neutrinos. It is shown that the restoration of parity is consequent with an indispensable left–right symmetric residual presymmetry. Thus, presymmetry substantiates left–right symmetry and the experimental search for the latter is the test of the former, with the nature of neutrinos as a crucial feature that can distinguish the left–right symmetry alone and its combination with presymmetry. This phenomenological implication is in accordance with the fact that Majorana neutrinos are usually demanded in the first case, but forbidden in the second.
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7

Shinohara, Kyosuke, and Hiroshi Hamada. "Cilia in Left–Right Symmetry Breaking." Cold Spring Harbor Perspectives in Biology 9, no. 10 (February 17, 2017): a028282. http://dx.doi.org/10.1101/cshperspect.a028282.

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8

Ma, Ernest. "Left-right symmetry and supersymmetric unification." Physical Review D 51, no. 1 (January 1, 1995): 236–39. http://dx.doi.org/10.1103/physrevd.51.236.

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9

Akhmedov, Eugeni Kh, Anjan S. Joshipura, Stefano Ranfone, and José W.F. Valle. "Left-right symmetry and neutrino stability." Nuclear Physics B 441, no. 1-2 (May 1995): 61–75. http://dx.doi.org/10.1016/0550-3213(95)00072-z.

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10

Senjanović, Goran. "Is left–right symmetry the key?" Modern Physics Letters A 32, no. 04 (January 24, 2017): 1730004. http://dx.doi.org/10.1142/s021773231730004x.

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In collaboration with Jogesh Pati, Abdus Salam challenged the chiral gauge nature of the Standard Model by paving the road towards the left-right symmetric electro-weak theory. I describe here the logical and historical construction of this theory, by emphasising the pioneering and key role it played for neutrino mass. I show that it is a self-contained and predictive model with the Higgs origin of Majorana neutrino mass, in complete analogy with the SM situation regarding charged fermions.
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Дисертації з теми "Right/left symmetry"

1

Inglis, Rachael Mary Foster. "Characterisation of novel genes and mechanisms that influence the development of left-right asymmetry in zebrafish." Thesis, University of Cambridge, 2014. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.708043.

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2

Santos, José Guilherme Pereira de Almeida. "Molecular tools to dissect the role of Dmrt2a and Dmrt2b in the left-right axis formation in zebrafish." Master's thesis, Faculdade de Ciências e Tecnologia, 2013. http://hdl.handle.net/10362/10902.

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Dissertação para obtenção do Grau de Mestre em Genética Molecular e Biomedicina
We tend to view the vertebrate body as bilaterally symmetric, but in fact, this only happens from the outside. Internally, most of the organs from heart to liver are asymmetrically positioned. Skeleton and its associated muscles, symmetric structures of the vertebrate body, have its origins in the transient symmetric blocks of mesoderm called somites whereas the asymmetric morphogenesis of the internal organs is due to asymmetric gene expression in the lateral plate mesoderm (LPM). Previous studies using Morpholino (MO) technology have shown that dmrt2a is involved in these two processes in zebrafish. When Dmrt2a levels are reduced, asymmetric gene expression in the LPM becomes randomized and symmetric gene expression in the presomitic mesoderm (PSM) is disrupted. The paralogous of dmrt2a, the fish specific dmrt2b has been shown to be involved in regulating asymmetric gene expression in the LPM as well. Here we used the recent Transcription activator-like effector nucleases (TALENs) technology to generate dmrt2a and dmrt2b mutant alleles that will allow us in the future to uncover the downstream effectors of these transcription factors using high-throughput experiments. In addition, we overexpressed dmrt2a at the one-cell stage to characterize asymmetry versus symmetry phenotypes. The results show clearly the ability of TALEN technology to generate mutant alleles in zebrafish. Nevertheless, dmrt2a and dmrt2b homozygous mutants developed so far fail to recapitulate their previously described MO phenotypes which raise the question on what molecular mechanism(s) allow(s) zebrafish to cope with frameshift mutations. The overexpression of dmrt2a shows that a time window of opportunity during which symmetric embryonic territories are able to respond to asymmetric signals does exist during embryonic development.
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3

Kuczynski, Victoria. "Lack of recovery of left-right symmetry during prolonged asymmetrical locomotion in the intact and chronic spinal-transected adult cat." Mémoire, Université de Sherbrooke, 2017. http://hdl.handle.net/11143/11524.

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Анотація:
La coordination des membres est un élément essentiel pour la marche terrestre chez les mammifères. Les mécanismes neuronaux et biomécaniques s'ajustent pour assurer le maintien d'un équilibre dynamique dans un environnement changeant. Lorsque le système est confronté à une perturbation persistante, la coordination des membres s'adapte. L'adaptation est définie comme un recalibrage du mouvement en réponse à une perturbation persistante ainsi que la présence d'après-effets une fois la perturbation disparue, ce qui indique que le nouveau patron a été entreposé dans le système nerveux central. Chez l'homme, le patron locomoteur s'adapte à une marche prolongée sur un tapis roulant partitionné, où l’une des jambes marche à une vitesse supérieure à l'autre, en rétablissant progressivement la symétrie des variables inter-jambes: périodes de double support et des longueurs des pas, ainsi qu’en réduisant l'amplitude de l'activité musculaire (EMG, électromyographie). L’objectif de notre étude était de déterminer si des chats intacts et des chats ayant subis une lésion complète de la moelle épinière (chat spinalisé) s’adaptent à la marche partitionnée prolongée. Pour caractériser l’adaptation locomotrice chez le chat intact et spinalisé, une prise de données cinématiques et électromyographiques des membres postérieurs a été effectuée chats intacts et les chats spinalisés, les longueurs de pas et les périodes de doubles supports étaient, en moyenne, symétriques, pendant la locomotion sur tapis roulant non-partitionné, et sont devenus asymétriques lors de la locomotion sur tapis roulant partitionné. Ces mesures inter-jambes sont demeurées asymétriques tout au long de la période de marche sur tapis roulant partitionné. Au retour à la marche sur tapis roulant non-partitionné, la symétrie a été immédiatement restaurée sans la présence d’après-effets. Chez les chats intacts, l'amplitude EMG moyenne des extenseurs a augmenté pendant la locomotion sur tapis roulant partitionné et elle est restée augmentée tout au long de cette période, alors que chez les chats spinalisés, l'amplitude EMG des membres postérieurs n'a pas changé. Ces résultats indiquent qu’il n’y a pas d’adaptation locomotrice chez le chat intact et spinalisé, ce qui suggère une importante différence physiologique dans le contrôle de la locomotion entre les chats et les humains lors d’une marche asymétrique prolongée. Par conséquent, nous proposons que la symétrie gauchedroite ne s’avère pas importante pour maintenir un équilibre dynamique pendant la locomotion asymétrique prolongée chez le chat, un quadrupède, comparé à l’humain adulte, un bipède.
Abstract : Coordination of the limbs is an essential component of terrestrial locomotion in mammals. When the system is confronted with persistent perturbations from the environment, the interlimb pattern learns to adapt. Adaptation is defined as a recalibration of the movement in response to a persistent perturbation as well as the presence of after-effects upon removal of the perturbation, indicating storage of the new pattern within the central nervous system. In humans, the pattern adapts to prolonged locomotion on a split-belt treadmill, where one leg steps faster than the other, by gradually restoring the symmetry of interlimb variables (double support periods, step lengths) and by reducing the amplitude of muscle activity (EMG, electromyography). The adaptation is also characterized by a reversal of the asymmetry of interlimb kinematic variables initially observed during the early split-belt period when returning to tied-belt locomotion (i.e. an after-effect). To assess the presence of locomotor adaptation, we measured intralimb (stance durations) and interlimb (double support periods, step lengths) variables bilaterally as well as EMG in the hindlimbs of intact and spinal-transected cats before, during and after 10 mins of split-belt locomotion. In both intact and spinal cats, step lengths and double support periods were, on average, symmetric, during tied-belt locomotion, and became asymmetric during split-belt locomotion. These interlimb variables remained asymmetrical throughout the split-belt period and upon returning to the tied-belt condition, left-right symmetry was immediately restored. In intact cats, the mean EMG amplitude of extensors increased during split-belt locomotion and remained increased throughout the split-belt period, while in spinal cats, hindlimb EMG amplitude did not change. The results indicate a lack of adaptation during prolonged split-belt locomotion in intact and spinal cats, suggesting an important physiological difference in the control of locomotion between cats and humans during prolonged asymmetric stepping. We propose that restoring left-right symmetry is not important to maintain dynamic balance during prolonged asymmetrical locomotion in the cat, a quadruped, as opposed to the adult human, a biped.
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4

Heidsieck, Tillmann Verfasser], Andrzej [Akademischer Betreuer] [Buras, and Wolfgang F. L. [Akademischer Betreuer] Hollik. "Four Generatios versus Left-Right Symmetry: A Comparative Numerical Analysis / Tillmann Heidsieck. Gutachter: Andrzej Jerzy Buras ; Wolfgang F. L. Hollik. Betreuer: Andrzej Jerzy Buras." München : Universitätsbibliothek der TU München, 2012. http://d-nb.info/1024161692/34.

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Heidsieck, Tillmann J. [Verfasser], Andrzej [Akademischer Betreuer] Buras, and Wolfgang F. L. [Akademischer Betreuer] Hollik. "Four Generatios versus Left-Right Symmetry: A Comparative Numerical Analysis / Tillmann Heidsieck. Gutachter: Andrzej Jerzy Buras ; Wolfgang F. L. Hollik. Betreuer: Andrzej Jerzy Buras." München : Universitätsbibliothek der TU München, 2012. http://nbn-resolving.de/urn:nbn:de:bvb:91-diss-20120625-1108688-1-8.

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6

Vale, Silva Luiz Henrique. "Phénoménologie de modèles à symétrie droite-gauche dans le secteur des quarks." Thesis, Université Paris-Saclay (ComUE), 2016. http://www.theses.fr/2016SACLS249/document.

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Bien qu'ayant beaucoup de succès pour décrire la grande variété de phénomènes de la physique des particules, le Modèle Standard (MS) laisse certaines propriétés de la nature sans explication. Ici, nous allons mettre l'accent sur le traitement différent des chiralités de type gauche et droite dans le cadre du MS. Une façon naturelle d'expliquer cela est de plonger le MS dans un modèle plus fondamental, capable de traiter les chiralités d'une manière symétrique. Cette classe de modèles, connue sous le nom de "modèles à symétrie droite-gauche" (LR models, en anglais), introduit une nouvelle interaction qui couple préférentiellement aux champs "droitiers". Puis, à une haute échelle d'énergie, la symétrie reliant droite et gauche est brisée spontanément donnant naissance au MS et aux phénomènes de violation de symétrie de parité. La manière spécifique par laquelle le mécanisme Brout-Englert-Higgs (BEH) se produit dans les modèles LR peut être sondée par des observables électrofaibles de précision, ce qui sert de premier test de l'extension du MS dans le secteur électrofaible. Comme conséquence du mécanisme BEH dans les modèles LR, de nouveaux bosons de jauge sont présents. Ce sont W’ et Z’, censés être beaucoup plus lourds que les bosons de jauge W et Z afin d'expliquer pourquoi ils n'ont jamais été vus jusqu'à présent. Ces nouvelles particules sont accompagnées d'une riche phénoménologie, comme de nouvelles sources de violation de CP au-delà de celle du MS. En outre, un nouveau secteur scalaire neutre introduit des courants qui changent la saveur (FCNC, en anglais) au niveau des arbres, un processus fortement restreint dans le MS, où il arrive seulement à l'ordre des boucles. L'existence de FCNCs fournit des contraintes extrêmement puissantes sur les modèles LR, et mérite donc une attention spéciale, en particulier lors du calcul des corrections venant de la QCD. Nous calculons donc les corrections au Next-to-Leading Order des effets à de courtes distances venant de la QCD aux contributions du modèle LR aux observables liées au mélange de mésons neutres et sensibles donc aux FCNC.Ensuite, nous considérons l'étude phénoménologique des modèles LR afin de tester leur viabilité et leur structure. Plus particulièrement, nous considérons le cas où des doublets scalaires sont responsables de la brisure du groupe de jauge des modèles LR. A cet effet, nous menons une étude combinée des observables de précision électrofaible, des bornes directes sur la masse des nouveaux bosons de jauge et des observables qui dérivent de l'oscillation des mésons neutres, dans le cas plus simple où la matrice de mixing dans le secteur droit est égal à la matrice CKM. Ces observables sont combinées dans le cadre du paquet CKMfitter d'analyse statistique. La combinaison de différentes classes d'observables doit prendre en compte la particularité des incertitudes théoriques, qui ne sont pas de nature statistique comme d'autres sources d'incertitude. A ce propos, nous considérons aussi la comparaison de différentes modèles d'incertitude théorique, afin de trouver des méthodes bien adaptées à la situation actuelle de notre connaissance des incertitudes théoriques impliquées dans un fit global en physique de la saveur
Though very successful in explaining a wide variety of particle physics phenomena, the Standard Model (SM) leaves unexplained some properties of nature. Here we focus on the different behaviours of left- and right-handed chiralities, or in other words the violation of parity symmetry. A possible and somewhat natural avenue to explain this feature is to embed the SM into a more symmetric framework, which treats the chiralities on equal footing. This class of models, the Left-Right (LR) Models, introduces new gauge interactions that couple preferentially to right-handed fields. Then, at an energy scale high enough, LR symmetry is spontaneously broken through the Brout-Englert-Higgs (BEH) mechanism, thus giving origin to the SM and to parity violating phenomena. The specific way in which the BEH mechanism operates in LR Models can be probed by EW Precision Observables, consisting of quantities that have been very accurately measured, serving as a first test of consistency for extensions of the SM in the EW sector. We revisit a simple realization of LR Models containing doublet scalars, and consider the phenomenological study of this doublet scenario in order to test the viability and structure of the LR Models. In particular, there is a rich phenomenology associated to the new gauge bosons W’ et Z’ introduced by LR Models, such as new sources of CP violation beyond the one of the SM. Moreover, the extended neutral scalar sector introduces Flavour Changing Neutral Couplings (FCNC) at tree level, which are strongly suppressed in the SM where they arrive first at one loop. FCNCs typically lead to extremely powerful constraints since they contribute to meson-mixing processes, and therefore deserve close attention. For this reason, we consider the calculation of short-distance QCD effects correcting the LR Model contributions to meson-mixing observables up to the Next-to-Leading Order (NLO), a precision required to set solid lower bounds on the LR Model scales. Finally, we combine in a global fit electroweak precision observables, direct searches for the new gauge bosons and meson oscillation observables in the simple case where the right-handed analogous of the CKM mixing-matrix is equal to the CKM matrix itself (a scenario called CKMfitter symmetry). The full set of the observables is combined by using the CKMfitter statistical framework, based on a frequentist analysis and a particular scheme for modeling theoretical uncertainties. We also discuss other possible modelings of theoretical uncertainties in a prospective study for future global flavour fits made by the CKMfitter Collaboration
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Hetzel, Jamil [Verfasser], and Tilman [Akademischer Betreuer] Plehn. "Phenomenology of a left-right-symmetric model inspired by the trinification model / Jamil Hetzel ; Betreuer: Tilman Plehn." Heidelberg : Universitätsbibliothek Heidelberg, 2015. http://d-nb.info/1180395387/34.

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8

Sulaiman, F. A. "The roles of Tbx5 and Tbx4 in the bilaterally symmetric initiation of the left and right limbs." Thesis, University College London (University of London), 2011. http://discovery.ucl.ac.uk/1325635/.

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Анотація:
Although there is no obvious communication between the left and right limb buds they develop to form bilaterally symmetrical structures of equal size (Summerbell & Wolpert, 1973). The underlying mechanisms that ensure symmetrical limb formation are unknown. Holt-Oram Syndrome (HOS) [OMIM 142900] is a congenital syndrome associated with mutations in TBX5 that lead to heart and upper limb defects. Strikingly, over 70% of HOS patients have left-biased upper limb defects. Using two separate strategies, I show that hypomorphic levels of Tbx5 in both the left and right forelimb buds produces forelimb defects that are consistently more severe in the left limb than the right. Using the INV/INV mutant background, in which the left-right axis is reversed, I show that the laterality of these defects is reversed in Tbx5 hypomorphic mutants with situs inversus. Additionally, I also show that transgenic expression of equal levels of Fgf10 in the forelimb buds of these Tbx5 hypomorphs can partially rescue outgrowth defects but not the left-bias asymmetry of their presentation. Together, this data suggests that Tbx5 has a role in ensuring symmetrical forelimb formation and that this is independent of its transcriptional regulation of Fgf10. Tbx4, the paralogue of Tbx5, is expressed in the hindlimb. I have used a conditional deletion approach to delete Tbx4 expression from the hindlimb area thus avoiding early embryonic lethality. I show that deletion of Tbx4 leads to a loss of proximal hindlimb skeletal elements as well as mispatterning of the distal hindlimb. I also show that Pitx1 partially contributes towards the establishment of the FGF signalling positive feedback loop during initiation of hindlimb bud outgrowth.
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9

Harris, Melissa. "Left-Right Symmetric Model : Putting lower bounds on the mass of the heavy, charged WR gauge boson." Thesis, Uppsala universitet, Högenergifysik, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-329683.

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In this project I have studied the left-right symmetric model (LRSM) as a candidate beyond standard model theory of particle physics. The most common version of the theory, called the minimal LRSM, has been studied and tested extensively for several decades. I have therefore modied this minimal LRSM by adapting the scalar sector and computing the mass of the charged right-handed gauge bosons WR for this particular scalar sector. I carried out a study of the theory and implemented it into FeynRules, in order to simulate LHC events using MadGraph. This allowed computation of the cross-section for the decay WR to a top and a bottom quark as a function of the mass of WR , which was compared with CMS data for the same decay, with proton-proton collisions at a centre of mass energy of 13 TeV. The final result was a constraint on the mass of WR , with a lower bound of 3 TeV.
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10

Tran, Viet Nhan Hao. "Restauration de la symétrie de parité intrinsèque dans les noyaux atomiques à partir d'approches de type champ moyen plus corrélations." Thesis, Bordeaux 1, 2010. http://www.theses.fr/2010BOR14016/document.

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Анотація:
Nous nous sommes intéressés à la restauration de la symétrie de réflexion droite-gauche brisée dans certains calculs effectués en utilisant l'approche HTDA (Higher Tamm-Dancoff Approximation). Cette approche a été proposée par le groupe de Bordeaux pour traiter de façon microscopique les corrélations en conservant explicitement les nombres de nucléons. La projection sur la parité par la méthode PAV (projection après variation) utilisant une généralisation du théorème de Wick de type Löwdin s'est avérée être très bien adaptée dans le cadre d'un modèle simplifié pour ce type de calcul et a permis de tourner certaines difficultés propres aux calculs qui utilisent la théorie de la fonctionnelle de la densité déduite par exemple de l'interaction de Skyrme. Les résultats obtenus pour des noyaux lourds manifestant une déformation octupôlaire ou à tout le moins une grande déformabilité pour ce mode, sont en gros tout à fait cohérents avec les calculs antérieurs effectués dans une approche HFB ou HF+BCS. D'autre part nos résultats montrent qu'on peut abaisser par projection sur la parité positive la hauteur de la seconde barrière de fission par une quantité de l'ordre de 1 MeV
This thesis has been concerned with the restoration of the left-right symmetry broken in some instances. This has been achieved in the framework of the Higher Tamm-Dancoff Approximation (HTDA) proposed by the Bordeaux group to treat correlations in an explicitly particle-number conserving microscopic approach. The parity-projected calculations performed within a PAV (projection after variation) method using a generalized Wick's theorem due to Löwdin has appeared to be a very well-suited frame. It has been implemented within a simple model approach. This has been proposed to clear out some difficulties appearing when one uses an Energy Density Functional approach with an energy density functional issued from an underlying Skyrme interaction. As a result we obtain a fairly good global agreement of our results with previous ones issuing from an HFB approach or its HF+BCS limit, for some heavy nuclei exhibiting a stable octupole deformation or at least a remarkable smoothness for this collective mode. As another result, we have shown that the projection on a positive parity solution is able to reduce the second fission barrier height by about 1 MeV
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Книги з теми "Right/left symmetry"

1

Gardner, Martin. The New Ambidextrous Universe: Symmetry and Asymmetry from Mirror Reflections to Superstrings. 3rd ed. New York, NY: W.H. Freeman, 1990.

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2

Gardner, Martin. L'univers ambidextre: Les miroirs de l'espace-temps. Paris: Seuil, 1985.

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3

Gardner, Martin. The ambidextrous universe: Mirror asymmetry and time-reversed worlds. 2nd ed. Harmondsworth: Penguin, 1991.

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4

Left-Right Asymmetry in Vertebrate Development (Advances in Anatomy, Embryology and Cell Biology). Springer, 2007.

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5

Gardner, Martin. L'univers ambidextre. Seuil, 1985.

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6

Gardner, Martin. The New Ambidextrous Universe: Symmetry and Asymmetry, from Mirror Reflections to Superstrings. 3rd ed. W.H. Freeman & Company, 1991.

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7

Gardner, Martin. L'univers ambidextre. Seuil, 1997.

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8

Gardner, Martin. Gespiegelte Universum: Links, Rechts - und der Sturz der Parität. Vieweg Verlag, Friedr, & Sohn Verlagsgesellschaft mbH, 2013.

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9

El universo ambidiestro. Spain: RBA Editores, 1993.

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10

Beale, Ivan L., and Michael C. Corballis. Psychology of Left and Right. Taylor & Francis Group, 2020.

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Частини книг з теми "Right/left symmetry"

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Lozano, Yolanda, Steven Duplij, Malte Henkel, Malte Henkel, Euro Spallucci, Steven Duplij, Malte Henkel, et al. "Super CP Problem, and left-right symmetry." In Concise Encyclopedia of Supersymmetry, 388. Dordrecht: Springer Netherlands, 2004. http://dx.doi.org/10.1007/1-4020-4522-0_520.

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Hamada, Hiroshi. "Roles of Motile and Immotile Cilia in Left-Right Symmetry Breaking." In Etiology and Morphogenesis of Congenital Heart Disease, 57–65. Tokyo: Springer Japan, 2016. http://dx.doi.org/10.1007/978-4-431-54628-3_7.

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Mohapatra, Rabindra N. "Left-Right Symmetric Models of Weak Interactions." In Unification and Supersymmetry, 127–74. New York, NY: Springer New York, 1992. http://dx.doi.org/10.1007/978-1-4757-4373-9_6.

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Mohapatra, Rabindra N. "Left-Right Symmetric Models of Weak Interactions." In Unification and Supersymmetry, 116–50. New York, NY: Springer New York, 1986. http://dx.doi.org/10.1007/978-1-4757-1928-4_6.

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Mohapatra, Rabindra N. "Left-Right Symmetric Models of Weak Interactions: A Review." In Quarks, Leptons, and Beyond, 219–90. Boston, MA: Springer US, 1985. http://dx.doi.org/10.1007/978-1-4899-2254-0_5.

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Bandyopadhyay, Triparno, and Amitava Raychaudhuri. "$$Z_2$$ Odd Sector Leading to Left-Right Symmetric Unification." In XXII DAE High Energy Physics Symposium, 109–12. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-73171-1_23.

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Mohapatra, R. N. "Constraints on the Left-Right Symmetric Models of Weak Interactions." In Weak and Electromagnetic Interactions in Nuclei, 493–504. Berlin, Heidelberg: Springer Berlin Heidelberg, 1986. http://dx.doi.org/10.1007/978-3-642-71689-8_95.

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Boruah, Bichitra Bijay, and Mrinal Kumar Das. "Realization of Left-Right Symmetric Model by Discrete Flavor Symmetries." In Springer Proceedings in Physics, 285–91. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-16-5141-0_30.

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Mohapatra, R. N. "Neutrinos in Left-Right Symmetric, SO(10) and Superstring Inspired Models." In Neutrinos, 117–46. Berlin, Heidelberg: Springer Berlin Heidelberg, 1988. http://dx.doi.org/10.1007/978-3-642-46648-9_4.

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Borgohain, Happy, and Mrinal Kumar Das. "Lepton Number Violation and Lepton Flavour Violation in Left-Right Symmetric Model." In XXII DAE High Energy Physics Symposium, 691–92. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-73171-1_164.

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Тези доповідей конференцій з теми "Right/left symmetry"

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Yajnik, Urjit A., Sasmita Mishra, and Debasish Borah. "Left-right symmetry, supersymmetry: Cosmological constraint." In 11TH CONFERENCE ON THE INTERSECTIONS OF PARTICLE AND NUCLEAR PHYSICS: (CIPANP 2012). AIP, 2013. http://dx.doi.org/10.1063/1.4826775.

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Honda, Tomonori, Fabien Nicaise, and Erik K. Antonsson. "Synthesis of Structural Symmetry Driven by Cost Savings." In ASME 2005 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2005. http://dx.doi.org/10.1115/detc2005-85111.

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Анотація:
An engineer presented with a design challenge often creates a symmetric solution. For instance, consider a table (front-back and left-right symmetry), a car (left and right symmetry), a bridge (front-back and left-right symmetry), or the space shuttle (left-right) symmetry. These examples may not be 100% symmetric, but their overriding features are remarkably similar. The reasons for the design of symmetric structures is not always clear. In some cases, like the table, symmetry may be a tradition. Similarly, the symmetry may be for aesthetic reasons. However in automated design algorithms, especially stochastic techniques, the output is often largely asymmetric, One reason for this is that fitness functions are not rewarded for symmetry. A possible resolution to this is to add a reward function for symmetry. Unfortunately, this approach is computationally intractable as well as arbitrary. In this paper a Genetic Algorithm based method is presented that rewards re-use of parts. The method is applied to a simple, idealized situation as well as to real design case. The results show that in some situations, symmetry naturally emerges from the synthesis, but that it does not provide clear performance advantages over asymmetric configurations.
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Nemevšek, Miha. "Low scale left-right symmetry and warm dark matter." In WORKSHOP ON DARK MATTER, UNIFICATION AND NEUTRINO PHYSICS: CETUP∗ 2012. AIP, 2013. http://dx.doi.org/10.1063/1.4807348.

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Naganathan, Sundar. "Exploring left-right symmetry of somites through multiview light sheet microscopy." In Virtual 12th Light Sheet Fluorescence Microscopy Conference 2020. Royal Microscopical Society, 2020. http://dx.doi.org/10.22443/rms.lsfm2020.5.

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Church, Katherine L., and Joseph F. Sturr. "Hemispheric and hemiretinal symmetry in sensitivity to spatial frequency." In OSA Annual Meeting. Washington, D.C.: Optica Publishing Group, 1987. http://dx.doi.org/10.1364/oam.1987.mn4.

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Анотація:
Evidence from studies requiring the recognition and discrimination of facial and letter stimuli suggests that the right and left cerebral hemispheres are more sensitive to low and high spatial frequencies, respectively. More direct tests requiring the detection of simple sinusoidal gratings have yielded inconclusive findings with some supporting hemispheric asymmetries and others failing to do so. These studies using sinusoidal gratings have used small n terms of 2 or 3, have not controlled eye movements, and in some cases have confounded hemiretina with hemispheric stimulation. Therefore, in the present study we investigated hemispheric and hemiretinal sensitivity to a low (0.8-cycle/deg) and a high (8.7-cycles/deg) spatial frequency grating in 8 observers. To minimize eye movements, the gratings were randomly presented for 100 ms, 1.4 deg from a central fixation in the right, left, upper, or lower visual fields. The right and left eye of each observer was tested during each of two sessions using a criterion-free spatial forced choice procedure. No evidence for asymmetric sensitivity to either spatial frequency was found between the right and left visual fields or for the nasal and temporal hemiretina.
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Cheng, Cheng, Lu Donghua, Su Qianhua, Wang Chengyue, and Xi Yanyan. "Experimental Research of Bundles Radial Power Distribution Influencing Factor on Fuel Assembly Mixing Characteristics." In 2022 29th International Conference on Nuclear Engineering. American Society of Mechanical Engineers, 2022. http://dx.doi.org/10.1115/icone29-89433.

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Abstract It can be seen that the studies on fuel assembly mixing performance in the reports are all focused on the influence factors of thermal parameters, and few on the structural parameters. In order to systematically investigate the influence of radial power distribution of rod bundles on the mixing characteristics of fuel assembly, the experimental study was carried out by a 14 ft 5 × 5 full-length rod bundle fuel assembly with both left-right symmetry and center-symmetric arrangement of cold and hot rod bundles. CFD numerical simulation method was used to calculate the same condition. The results show that the radial power ratio of the rod bundles has little effect on the mixing coefficient kT of the fuel assembly when the rod bundle is centrally symmetrical. When the rod bundle is left-right symmetrical, the temperature matrix of the sub-channel section presents an angular symmetry phenomenon near 45°. The experimental results and CFD simulation both show that the configuration of the mixing vanes forms a macroscopic diagonal circulation of the fluid in the sub-channel. FLLICA-IIIF subchannel software could not accurately simulate the diagonal circulation phenomenon of the fluid in the subchannel.
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Torres, A. Martínez, K. P. Khemchandani, F. S. Navarra, M. Nielsen, and E. Oset. "Studying the ${e^ + }{e^ - } \to {\left( {{D^*}{{\bar D}^*}} \right)^ \pm }{\pi ^ \mp }$ reaction and the claim for the Zc(1790) resonance." In Seventh International Symposium on Chiral Symmetry in Hadrons and Nuclei. WORLD SCIENTIFIC, 2014. http://dx.doi.org/10.1142/9789814618229_0021.

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Moroney, N., L. Del Bino, S. Zhang, M. T. M. Woodley, L. Hill, T. Wildi, V. J. Wittwer, et al. "All-optical Kerr Polarization Controller." In CLEO: QELS_Fundamental Science. Washington, D.C.: Optica Publishing Group, 2022. http://dx.doi.org/10.1364/cleo_qels.2022.fth2a.3.

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We demonstrate an all-optical polarization controller in a high-finesse Fabry-Pérot microresonator. Kerr-nonlinearity-induced symmetry breaking splits linear polarized input light into left- and right-circular polarized components, enabling all-optical polarization control with mW-level threshold.
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Genovese, Andrea F., Jordan Juras, Chris Miller, and Agnieszka Roginska. "Investigation of ITD Symmetry in Measured HRIRs." In The 22nd International Conference on Auditory Display. Arlington, Virginia: The International Community for Auditory Display, 2016. http://dx.doi.org/10.21785/icad2016.012.

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The Interaural Time Difference is one of the primary localiza- tion cues for 3D sound. However, due to differences in head and ear anthropometry across the population, ITDs related to a sound source at a given location around the head will differ from sub- ject to subject. Furthermore, most individuals do not possess sym- metrical traits between the left and right pinnae. This fact may cause an angle-dependent ITD asymmetry between locations mir- rored across the left and right hemispheres. This paper describes an exploratory analysis performed on publicly available databases of individually measured HRIRs. The analysis was first performed separately for each dataset in order to explore the impact of dif- ferent formats and measurement techniques, and then on pooled sets of repositories, in order to obtain statistical information closer to the population values. Asymmetry in ITDs was found to be consistently more prominent in the rear-lateral angles (approxi- mately between 90° and 130° azimuth) across all databases inves- tigated, suggesting the presence of a sensitive region. A signifi- cant difference between the peak asymmetry values and the aver- age asymmetry across all angles was found on three out of four examined datasets. These results were further explored by pooling the datasets together, which revealed an asymmetry peak at 110° that also showed significance. Moreover, it was found that within the region of sensitivity the difference between specular ITDs ex- ceeds the just noticeable difference values for perceptual discrim- ination at all frequency bands. These findings validate the sta- tistical presence of ITD asymmetry in public datasets of individ- ual HRIRs and identify a significant, perceptually-relevant, region of increased asymmetry. Details of these results are of interest for HRIR modeling and personalization techniques, which should consider implementing compensation for asymmetric ITDs when aiming for perceptually accurate binaural displays. This work is part of a larger study aimed at binaural-audio personalization and user-characterization through non-invasive techniques.
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Sanatkhani, Soroosh, and Prahlad G. Menon. "Three-Dimensional Cephalometric Analysis Using Computed Tomographic Imaging." In ASME 2018 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/imece2018-88259.

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Successful outcomes from the use of orthodontic devices are underpinned on their effective anchorage and the loading that they apply to the underlying facial structures. Anchorage plays an important role in determining the point of application of the corrective forces and subsequently the orientation of the resultant of these forces, which in-turn governs the outcome of treatment. Therefore, patient-specific design of anchors and their placement may benefit significantly from personalization using patient-specific and three-dimensional (3D) cephalometry. 3D cephalometry is therefore a first step to personalization of orthodontic treatment. In this feasibility study, we demonstrate the viability a novel image processing and surface analysis pipeline to quantify facial symmetry about the mid-sagittal facial plane, which may offer insight into optimal placement and orientation for implantation of orthodontic anchors, starting with patient-specific cone beam computed tomography (CBCT) images. Typical assessments of geometrical features/attributes of face include size, position, orientation, shape, and symmetry. Using 3D CBCT images in the DICOM image format, skull images were first segmented using a basic iso-contouring approach. To quantify symmetry, we split the skull along the mid-sagittal plane and used an iterative closest point (ICP) approach in order to rigidly co-register the left and right sides of the skull, optimizing for rotation, translation and scaling, after reflection of one half across the mid-sagittal plane. This was accomplished using an in-house plugin is developed for the open-source visualization toolkit (VTK) based 3D visualization tool, Paraview (Kitware Inc.). Finally, using a signed regional distance mapping plugin we were able to assess the regional asymmetry of regions of the skull (e.g. upper and lower jaw – specific targets for therapy) using colormaps of regional asymmetry (in terms of left-v/s-right side surface distance) and visualized the same as vector glyphs. The direction of these vectors is synonymous with anticipated regional forces required in order to achieve left-right symmetry, which in-turn may have value in surgical planning for orthodontic implantation. In sum, we demonstrate a workflow for computer-aided cephalometry to assess the symmetry of the skull, which shows promise for personalized orthodontic anchor design.
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