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Journal articles on the topic 'Observable canonical forms'

Author: Grafiati

Published: 7 July 2024

Last updated: 31 July 2025

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1

Liuti, Simonetta, Aurore Courtoy, Gary R. Goldstein, J. Osvaldo Gonzalez Hernandez, and Abha Rajan. "Observables for Quarks and Gluons Orbital Angular Momentum Distributions." International Journal of Modern Physics: Conference Series 37 (January 2015): 1560039. http://dx.doi.org/10.1142/s2010194515600393.

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We discuss the observables that have been recently put forth to describe quarks and gluons orbital angular momentum distributions. Starting from a standard parameterization of the energy momentum tensor in QCD one can single out two forms of angular momentum, a so-called kinetic term – Ji decomposition – or a canonical term – Jaffe-Manohar decomposition. Orbital angular momentum has been connected in each decomposition to a different observable, a Generalized Transverse Momentum Distribution (GTMD), for the canonical term, and a twist three Generalized Parton Distribution (GPD) for the kinetic

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2

Astrovskii, A. I., and I. V. Gaishun. "Uniformly observable linear nonstationary systems with many outputs and their canonical forms." Differential Equations 36, no. 1 (2000): 21–29. http://dx.doi.org/10.1007/bf02754159.

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3

Yadykin, Igor. "Spectral Decomposition of Gramians of Continuous Linear Systems in the Form of Hadamard Products." Mathematics 12, no. 1 (2023): 36. http://dx.doi.org/10.3390/math12010036.

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New possibilities of Gramian computation, by means of canonical transformations into diagonal, controllable, and observable canonical forms, are shown. Using such a technique, the Gramian matrices can be represented as products of the Hadamard matrices of multipliers and the matrices of the transformed right-hand sides of Lyapunov equations. It is shown that these multiplier matrices are invariant under various canonical transformations of linear continuous systems. The modal Lyapunov equations for continuous SISO LTI systems in diagonal form are obtained, and their new solutions based on Hada

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4

Kaczorek, Tadeusz. "Transformations of the discrete-time linear systems to the positive asymptotically stable forms." Journal of Automation, Electronics and Electrical Engineering 6, no. 2 (2024): 23–33. https://doi.org/10.24136/jeee.2024.005.

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New approaches to the transformations of the discrete-time linear systems to their positive asymptotically stable canonical controllable (observable) forms is proposed. It is shown that if the matrix A of the system is nonsingular then the desired transformation matrix can be chosen in block diagonal form. Procedures for computation of the transformation matrices are proposed and illustrated by simple numerical examples.

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5

Kaczorek, Tadeusz. "Some analysis problems of the linear systems." Journal of Automation, Electronics and Electrical Engineering 4, no. 2 (2022): 7–12. http://dx.doi.org/10.24136/jaeee.2022.006.

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New approaches to the transformations of the uncontrollable and unobservable matrices of linear systems to their canonical forms are proposed. It is shown that the uncontrollable pair (A,B) and unobservable pair (A,C) of linear systems can be transform to their controllable (A,B), and observable (A,C) canonical forms by suitable choice of nonsingular matrix M satisfying the condition M[AB]=[AB] and M=[A,B] , respectively. It is also shown that by suitable choice of the gain matrix K of the feedbacks of the derivative of the state vector it is possible to reduce the descriptor system to the sta

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6

Wu, Chen-Yin, Jason Sheng-Hong Tsai, Shu-Mei Guo, Te-Jen Su, Leang-San Shieh, and Jun-Juh Yan. "Novel observer/controller identification method-based minimal realisations in block observable/controllable canonical forms and compensation improvement." International Journal of Systems Science 48, no. 7 (2017): 1522–36. http://dx.doi.org/10.1080/00207721.2016.1269221.

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7

BENDOR, JONATHAN, and ADAM MEIROWITZ. "Spatial Models of Delegation." American Political Science Review 98, no. 2 (2004): 293–310. http://dx.doi.org/10.1017/s0003055404001157.

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Although a large literature on delegation exists, few models have pushed beyond a core set of canonical assumptions. This approach may be justified on grounds of tractability, but the failure to grasp the significance of different assumptions and push beyond specific models has limited our understanding of the incentives for delegation. Consequently, the justifications for delegation that have received recent scrutiny and testing differ from some of the more plausible justifications offered by informal studies of delegation. We show that surprisingly few results in the literature hinge on risk

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8

Hardy, Adam. "Hindu Temples and the Emanating Cosmos." Religion and the Arts 20, no. 1-2 (2016): 112–34. http://dx.doi.org/10.1163/15685292-02001006.

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A recurrent idea in Indian philosophical, theological, and mythological systems is that of a universe manifested through a sequence of emanations. Diverse traditions of doctrine and practice share this vision of the progression from the one to the many. Temple designs often embody the same pattern. Within the diverse traditions of Indian temple architecture, an emanatory scheme is observable both in the formal structure of individual temple designs, which express a dynamic sequence of emergence and growth, and in the way in which temple forms develop throughout the course of such traditions. T

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9

Hiiemäe, Reet. "COMMUNICATION WITH SUPERNATURAL PROTECTORS AND HELPERS IN ESTONIA IN THE 21ST CENTURY." Religious dialogue and cooperation 6, no. 6 (2025): 31–40. https://doi.org/10.47054/rdc256631h.

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Estonia has been repeatedly called the least religious country in Europe or even the whole world. The Estonian mainstream media and politics mainly resonate with the identification of Estonians as a rational high-tech and science-oriented nation. Although the number of people who believe in biblical God and/or feel affiliated to any canonical religion is indeed low according to representative polls, there are numerous other forms for communicating with the numinous (e.g., in the form of protective angels, spirit animals, nature spirits, spirits of dead relatives, or pets who give spiritual gui

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10

Krasnoshchekova, S. V. "Pronouns functioning as direct objects in the speech of Russian-language children." Russian language at school 83, no. 2 (2022): 23–34. http://dx.doi.org/10.30515/0131-6141-2022-83-2-23-34.

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The study is devoted to Russian pronouns which children use in grammatical position of a direct object. The aim of the research is to consider the distinctive features of the pronouns belonging to different semantic groups. Additionally, the paper is an effort to answer the question if the connection between the position of the object in the sentence and the semantics of the pronoun is relevant when mastering the language, i.e. to discover pronouns of what classes are more likely to be associated with the object syntactic function in children’s speech. Corpus recordings of children’s speech, n

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11

ABE, MITSUKO. "MODULI SPACES IN THE FOUR-DIMENSIONAL TOPOLOGICAL HALF-FLAT GRAVITY." Modern Physics Letters A 10, no. 32 (1995): 2401–12. http://dx.doi.org/10.1142/s0217732395002556.

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We classify the moduli spaces of the four-dimensional topological half-flat gravity models by using the canonical bundle. For a K3-surface or T4, they describe an equivalent class of a trio of the Einstein-Kähler forms (the hyperkähler forms). We calculate the dimensions of these moduli spaces by using the Atiyah-Singer Index theorem. We mention the partition function and the possibility of the observables in the Witten-type topological half-flat gravity model case.

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12

Yin, Zheng. "Abstract P5-11-01: Epithelial-Mesenchymal Plasticity is Regulated by Inflammatory Signaling Networks Coupled to Cell Morphology." Cancer Research 83, no. 5_Supplement (2023): P5–11–01—P5–11–01. http://dx.doi.org/10.1158/1538-7445.sabcs22-p5-11-01.

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Abstract Purpose: During development and homeostatic processes such as wound repair, certain cells undergo a remarkable process where they radically transform in cell shape and state, from epithelial to mesenchymal cells. This ability is referred to as ‘Epithelial-Mesenchymal Plasticity’ (EMP), triggered by both mechanical (i.e. loss of cell-cell contact) and soluble cues (i.e. TGFβ), and is absolutely essential in both embryonic and adult organisms. Dysregulation of EMP also occurs in cancer; where tumor cells undergo EMP to become metastatic, stem-like, and drug resistant. Critically, increa

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13

LUSANNA, LUCA. "CLASSICAL YANG-MILLS THEORY WITH FERMIONS II: DIRAC’S OBSERVABLES." International Journal of Modern Physics A 10, no. 26 (1995): 3675–757. http://dx.doi.org/10.1142/s0217751x95001753.

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For pure Yang-Mills theory on Minkowski space-time, formulated in functional spaces where the covariant divergence is an elliptic operator without zero modes, and for a trivial principal bundle over the fixed time Euclidean space with a compact, semisimple, connected and simply connected structure Lie group, a Green function for the covariant divergence has been found. It allows one to solve the first class constraints associated with Gauss’ laws and to identify a connection-dependent coordinatization of the trivial principal bundle. In a neighborhood of the global identity section, by using c

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14

Herbut, Fedor. "On Schmidt Decomposition: Approach Based on Correlation Operator as Bipartite Entanglement Entity." Quanta 7, no. 1 (2018): 19. http://dx.doi.org/10.12743/quanta.v7i1.69.

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An elaborated review with proofs of Schmidt canonical decomposition of any bipartite state vector is approached through general subsystem basis expansion. The upgraded forms of Schmidt decomposition in terms of correlation operator and twin observables are presented in detail. The discussion is extended to distant measurement, Einstein–Podolsky–Rosen states and Schrödinger's steering. All claims and proofs are given in standard form unlike in the previous articles of the author where all results were obtained utilizing the very rarely used antilinear Hilbert–Schmidt maps of one subsystem state

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15

Liang, Shi-Dong. "Klein-Gordon Theory in Noncommutative Phase Space." Symmetry 15, no. 2 (2023): 367. http://dx.doi.org/10.3390/sym15020367.

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We extend the three-dimensional noncommutative relations of the position and momentum operators to those in the four dimension. Using the Seiberg-Witten (SW) map, we give the Heisenberg representation of these noncommutative algebras and endow the noncommutative parameters associated with the Planck constant, Planck length and cosmological constant. As an analog with the electromagnetic gauge potential, the noncommutative effect can be interpreted as an effective gauge field, which depends on the Plank constant and cosmological constant. Based on these noncommutative relations, we give the Kle

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16

Van de Sande, M., C. Walsh, and T. Danilovich. "Chemical modelling of dust–gas chemistry within AGB outflows – II. Effect of the dust-grain size distribution." Monthly Notices of the Royal Astronomical Society 495, no. 2 (2020): 1650–65. http://dx.doi.org/10.1093/mnras/staa1270.

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ABSTRACT Asymptotic giant branch (AGB) stars are, together with supernovae, the main contributors of stellar dust to the interstellar medium (ISM). Dust grains formed by AGB stars are thought to be large. However, as dust nucleation and growth within their outflows are still not understood, the dust-grain size distribution (GSD) is unknown. This is an important uncertainty regarding our knowledge of the chemical and physical history of interstellar dust, as AGB dust forms ${\sim} 70{{\ \rm per\ cent}}$ of the starting point of its evolution. We expand on our chemical kinetics model, which uniq

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17

Verch, Rainer. "Continuity of Symplectically Adjoint Maps and the Algebraic Structure of Hadamard Vacuum Representations for Quantum Fields on Curved Spacetime." Reviews in Mathematical Physics 09, no. 05 (1997): 635–74. http://dx.doi.org/10.1142/s0129055x97000233.

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We derive for a pair of operators on a symplectic space which are adjoints of each other with respect to the symplectic form (that is, they are sympletically adjoint) that, if they are bounded for some scalar product on the symplectic space dominating the symplectic form, then they are bounded with respect to a one-parametric family of scalar products canonically associated with the initially given one, among them being its "purification". As a typical example we consider a scalar field on a globally hyperbolic spacetime governed by the Klein–Gordon equation; the classical system is described

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18

Furman, Anatolii, and Nataliia Rybina. "Value-conceptual sphere and self-efficacy of professionals in the socionomic field." Psihologìâ ì suspìlʹstvo 90, no. 2 (2024): 135–46. https://doi.org/10.35774/pis2024.02.135.

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The interdisciplinary study implements the author’s idea of the inter-causative unity of the value-meaning sphere, professional competence and self-efficacy of the sociologist as an educated psychologist and is devoted to the conceptual and empirical substantiation of the generalized – idealized, reference and even de facto canonical – value-conceptual profile and self-efficacy of an effective psychologist , a teacher, a social worker in the epistemic organization of their holistic axio-psychological portrait. By using a post-non-classically oriented methodological lens for understanding/const

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19

Winter, Joe H., Reyhan Ay, Bernd Braunecker, and A. M. Cook. "Observable-enriched entanglement." Physical Review B 111, no. 16 (2025). https://doi.org/10.1103/physrevb.111.165143.

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We introduce methods of characterizing entanglement on the example of the quantum skyrmion Hall effect, in which entanglement measures are enriched by the matrix representations of operators for observables. These observable operator matrix representations can enrich the partial trace over subsets of a system's degrees of freedom, yielding reduced density matrices useful in computing various measures of entanglement, which also preserve the observable expectation value. We focus here on applying these methods to compute entanglement spectra, unveiling bulk-boundary correspondences of canonical

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20

Teufel, Stefan, Roderich Tumulka, and Cornelia Vogel. "Canonical Typicality for Other Ensembles than Micro-canonical." Annales Henri Poincaré, July 2, 2024. http://dx.doi.org/10.1007/s00023-024-01466-7.

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AbstractWe generalize Lévy’s lemma, a concentration-of-measure result for the uniform probability distribution on high-dimensional spheres, to a much more general class of measures, so-called GAP measures. For any given density matrix $$\rho $$ ρ on a separable Hilbert space $${\mathcal {H}}$$ H , $${\textrm{GAP}}(\rho )$$ GAP ( ρ ) is the most spread-out probability measure on the unit sphere of $${\mathcal {H}}$$ H that has density matrix $$\rho $$ ρ and thus forms the natural generalization of the uniform distribution. We prove concentration-of-measure whenever the largest eigenvalue $$\Ver

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21

Arkani-Hamed, Nima, Johannes Henn, and Jaroslav Trnka. "Nonperturbative negative geometries: amplitudes at strong coupling and the amplituhedron." Journal of High Energy Physics 2022, no. 3 (2022). http://dx.doi.org/10.1007/jhep03(2022)108.

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Abstract The amplituhedron determines scattering amplitudes in planar $$ \mathcal{N} $$ N = 4 super Yang-Mills by a single “positive geometry” in the space of kinematic and loop variables. We study a closely related definition of the amplituhedron for the simplest case of four-particle scattering, given as a sum over complementary “negative geometries”, which provides a natural geometric understanding of the exponentiation of infrared (IR) divergences, as well as a new geometric definition of an IR finite observable $$ \mathcal{F} $$ F (g, z) — dually interpreted as the expectation value of th

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22

Pontes, Gleison de Abreu, Sirlei Lemes, Jéssica Rayse de Melo Silva, and Patrícia de Souza Costa. "Association between earnings management and non-GAAP measures." REVISTA AMBIENTE CONTÁBIL - Universidade Federal do Rio Grande do Norte - ISSN 2176-9036 17, no. 2 (2025). https://doi.org/10.21680/2176-9036.2025v17n2id40759.

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Purpose: To investigate the association between Abnormal Book-Tax Differences (ABTD) and the measures of Earnings Before Interest, Taxes, Depreciation, and Amortization (EBITDA), and Adjusted EBITDA, as reported by Brazilian publicly traded companies. Methodology: Use of canonical correlation on data manually collected from Reference Forms regarding EBITDA and Adjusted EBITDA, as well as information from financial statements needed to estimate ABTD, which were obtained from the Economatica® platform, analyzing the behavior of the variables during the period from 2012 to 2021. Results: The stud

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23

El Mazoudi, El Houssine, mostafa Mrabti, and Noureddine Elalami. "Observer design for a fish population model." Revue Africaine de la Recherche en Informatique et Mathématiques Appliquées Volume 8, Special Issue... (September 24, 2008). http://dx.doi.org/10.46298/arima.1886.

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International audience Our aim is to apply some tools of control to fishing population systems. In this paper we construct a non linear observer for the continuous stage structured model of an exploited fish population, using the fishing effort as a control term, the age classes as a states and the quantity of captured fish as a measured output. Under some biological satisfied assumptions we formulate the observer corresponding to this system and show its exponential convergence. With the Lie derivative transformation, we show that the model can be transformed to a canonical observable form; t

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24

Huenupi, Javier, Ellie Hughes, Gonzalo A. Palma, and Spyros Sypsas. "Regularizing infrared divergences in de Sitter spacetime: Loops, dimensional regularization, and cutoffs." Physical Review D 110, no. 12 (2024). https://doi.org/10.1103/physrevd.110.123536.

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Correlation functions of light scalar fields in de Sitter spacetime, computed via standard perturbation theory, often exhibit secular growth characterized by time-dependent divergent terms in the form of powers of lna(t), where a(t) is the scale factor describing cosmic expansion. It is widely believed that loop corrections further enhance this secular growth. We argue that this is not necessarily the case: Loop corrections can be systematically handled using standard perturbative techniques, such as dimensional regularization, without introducing new lna(t) terms. We focus on a canonical mass

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25

Bhaumik, Arko, and Soumitra SenGupta. "Moduli dynamics in effective nested warped geometry in four dimensions and some cosmological implications." Journal of High Energy Physics 2024, no. 9 (2024). http://dx.doi.org/10.1007/jhep09(2024)003.

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Abstract We analyze the effective four-dimensional dynamics of the extra-dimensional moduli fields in curved braneworlds having nested warping, with particular emphasis on the doubly warped model which is interesting in the light of current collider constraints on the mass of the Kaluza-Klein graviton. The presence of a non-zero brane cosmological constant (Ω) naturally induces an effective moduli potential in the four-dimensional action, which shows distinct features in dS (Ω > 0) and AdS (Ω < 0) branches. For the observationally interesting case of dS 4-branes, a metastable minimum in

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26

Cai, Bao-Jun, and Bao-An Li. "Novel scalings of neutron star properties from analyzing dimensionless Tolman–Oppenheimer–Volkoff equations." European Physical Journal A 61, no. 3 (2025). https://doi.org/10.1140/epja/s10050-025-01507-7.

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Abstract The Tolman–Oppenheimer–Volkoff (TOV) equations govern the radial evolution of pressure and energy density in static neutron stars (NSs) in hydrodynamical equilibrium. Using the reduced pressure and energy density with respect to the NS central energy density, the original TOV equations can be recast into dimensionless forms. While the traditionally used integral approach for solving the original TOV equations require an input nuclear Equation of State (EOS), the dimensionless TOV equations can be anatomized by using the reduced pressure and energy density as polynomials of the reduced

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