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Journal articles on the topic 'Constructive Field Theory'

Author: Grafiati

Published: 19 October 2024

Last updated: 19 July 2025

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1

Hancox-Li, Leif. "Solutions in Constructive Field Theory." Philosophy of Science 84, no. 2 (2017): 335–58. http://dx.doi.org/10.1086/690722.

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Rivasseau, V. "Constructive Field Theory in Zero Dimension." Advances in Mathematical Physics 2009 (2009): 1–12. http://dx.doi.org/10.1155/2009/180159.

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Constructive field theory can be considered as a reorganization of perturbation theory in a convergent way. In this pedagogical note we propose to wander through five different methods to compute the number of connected graphs of the zero-dimensional field theory, in increasing order of sophistication and power.

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3

Magnen, Jacques, та Vincent Rivasseau. "Constructive ϕ 4 Field Theory without Tears". Annales Henri Poincaré 9, № 2 (2008): 403–24. http://dx.doi.org/10.1007/s00023-008-0360-1.

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4

Baez, J. C., I. E. Segal, Z. Zhou, and Mark A. Kon. "Introduction to Algebraic and Constructive Quantum Field Theory." Physics Today 46, no. 12 (1993): 43. http://dx.doi.org/10.1063/1.2809125.

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Rivasseau, V. "Constructive field theory and applications: Perspectives and open problems." Journal of Mathematical Physics 41, no. 6 (2000): 3764–75. http://dx.doi.org/10.1063/1.533326.

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6

NILL, FLORIAN. "A CONSTRUCTIVE QUANTUM FIELD THEORETIC APPROACH TO CHERN-SIMONS THEORY." International Journal of Modern Physics B 06, no. 11n12 (1992): 2159–98. http://dx.doi.org/10.1142/s0217979292001080.

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Chern-Simons theory is formulated quantum field theoretically in terms of string operators, which are localized on finite non-selfintersecting paths in the zero-time plane R2. It is shown how the Weyl algebra approach to the abelian Chern-Simons theory leads to a bundle theoretic construction of these ‘Chern-Simons string operators’. To proceed to the non-abelian case topological Chern-Simons theory is considered as a specific model of a more general theory describing the quantum kinematics of coloured framed Plek ton s inR2. This theory allows the construction of string operators as pair-crea

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WATANABE, HIROSHI. "RENORMALIZATION GROUP METHODS IN CONSTRUCTIVE FIELD THEORIES." International Journal of Modern Physics B 14, no. 12n13 (2000): 1363–98. http://dx.doi.org/10.1142/s0217979200001023.

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Mathematical construction of quantum field theory is reviewed with emphasis on the conceptual structure of the construction and on the role of rigorous renormalization group analysis without technical details. After explaining a rigorous formulation of a renormalization group method in a weak coupling region, a new approach in a strong coupling region is proposed in the context of the hierarchical approximation. An idea of proving triviality in d≥4 dimensions utilizing this new proposal concludes this review.

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TESCHNER, J. "A LECTURE ON THE LIOUVILLE VERTEX OPERATORS (REVIEW)." International Journal of Modern Physics A 19, supp02 (2004): 436–58. http://dx.doi.org/10.1142/s0217751x04020567.

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We reconsider the construction of exponential fields in the quantized Liouville theory. It is based on a free-field construction of a continuous family or chiral vertex operators. We derive the fusion and braid relations of the chiral vertex operators. This allows us to simplify the verification of locality and crossing symmetry of the exponential fields considerably. The calculation of the matrix elements of the exponential fields leads to a constructive derivation of the formula proposed by Dorn/Otto and the brothers Zamolodchikov.

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Delepouve, Thibault, and Vincent Rivasseau. "Constructive Tensor Field Theory: the $${T^4_3}$$ T 3 4 Model." Communications in Mathematical Physics 345, no. 2 (2016): 477–506. http://dx.doi.org/10.1007/s00220-016-2680-1.

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Robinson, Derek W. "Commutator Theory on Hilbert Space." Canadian Journal of Mathematics 39, no. 5 (1987): 1235–80. http://dx.doi.org/10.4153/cjm-1987-063-2.

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Commutator theory has its origins in constructive quantum field theory. It was initially developed by Glirnm and Jaffe [7] as a method to establish self-adjointness of quantum fields and model Hamiltonians. But it has subsequently proved useful for a variety of other problems in field theory [17] [15] [8] [3], quantum mechanics [5], and Lie group theory [6]. Despite all these detailed applications no attempt appears to have been made to systematically develop the theory although reviews have been given in [22] and [9]. The primary aim of the present paper is to partially correct this situation

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Nakayama, Yu. "a – c test of holography versus quantum renormalization group." Modern Physics Letters A 29, no. 29 (2014): 1450158. http://dx.doi.org/10.1142/s0217732314501582.

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We show that a "constructive derivation" of the anti-de Sitter/conformal field theory (AdS/CFT) correspondence based on the quantum local renormalization group in large-N quantum field theories consistently provides the a – c holographic Weyl anomaly in d = 4 at the curvature squared order in the bulk action. The consistency of the construction further predicts the form of the metric beta function.

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12

SANDU, Antonio. "Constructionist Grounded Theory - GT. Conceptual and Methodological Clarifications." Revista Romaneasca pentru Educatie Multidimensionala 10, no. 1 (2018): 183. http://dx.doi.org/10.18662/rrem/28.

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In this article we aim to bring a series of epistemological and conceptual clarifications on a particular method of qualitative research entitled Grounded Theory (GT) in its social-constructive approach. The peculiarity of this research method is the exploratory character, the theoretical explanatory construction based on data gathered from the field and not from a series of assumptions taken from the literature, or built from the missing knowledge areas within it. The socio-constructivist dimension emphasizes the context dependence of the obtained results and the generated interpretative mode

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SHALABY, ABOUZEID M., and S. T. EL-BASYOUNY. "A NONPERTURBATIVE CALCULATION FOR THE EFFECTIVE POTENTIAL OF THE $\left(\frac{g}{4}\phi^{4}-J\phi\right)_{1+1}$ SCALAR FIELD THEORY USING THE OSCILLATOR REPRESENTATION METHOD WITH BOREL RESUMMATION." International Journal of Modern Physics A 22, no. 06 (2007): 1265–78. http://dx.doi.org/10.1142/s0217751x07034374.

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We established a resummed formula for the effective potential of [Formula: see text] scalar field theory that can mimic the true effective potential not only at the critical region but also at any point in the coupling space. We first extend the effective potential from the oscillator representation method, perturbatively, up to g3 order. We supplement perturbations by the use of a resummation algorithm, originally due to Kleinert, Thoms and Janke, which has the privilege of using the strong coupling as well as the large coupling behaviors rather than the conventional resummation techniques wh

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Bahns, Dorothea, Klaus Fredenhagen, and Kasia Rejzner. "Local Nets of Von Neumann Algebras in the Sine–Gordon Model." Communications in Mathematical Physics 383, no. 1 (2021): 1–33. http://dx.doi.org/10.1007/s00220-021-03961-y.

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AbstractThe Haag–Kastler net of local von Neumann algebras is constructed in the ultraviolet finite regime of the Sine–Gordon model, and its equivalence with the massive Thirring model is proved. In contrast to other authors, we do not add an auxiliary mass term, and we work completely in Lorentzian signature. The construction is based on the functional formalism for perturbative Algebraic Quantum Field Theory together with estimates originally derived within Constructive Quantum Field Theory and adapted to Lorentzian signature. The paper extends previous work by two of us.

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Vostokov, S. V., O. Yu Podkopaeva, and K. V. Ratko. "Application of explicit Hilbert's pairing to constructive class field theory and cryptography." Applied Mathematical Sciences 10 (2016): 2205–13. http://dx.doi.org/10.12988/ams.2016.64149.

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Rivasseau, V., and F. Vignes-Tourneret. "Constructive Tensor Field Theory: The $${T_{4}^{4}}$$ T 4 4 Model." Communications in Mathematical Physics 366, no. 2 (2019): 567–646. http://dx.doi.org/10.1007/s00220-019-03369-9.

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Lahoche, Vincent. "Constructive tensorial group field theory II: the ${U(1)-T^4_4}$ model." Journal of Physics A: Mathematical and Theoretical 51, no. 18 (2018): 185402. http://dx.doi.org/10.1088/1751-8121/aab8a7.

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Lahoche, Vincent. "Constructive tensorial group field theory I: The ${U(1)}$ -${T^4_3}$ model." Journal of Physics A: Mathematical and Theoretical 51, no. 18 (2018): 185403. http://dx.doi.org/10.1088/1751-8121/aab8a8.

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Nedaei, Moein, Alexis Jacoby, and Els Du Bois. "Design-Driven Conflicts: Exploring the Contribution of Design for Constructing Social Controversies from a Theoretical Standpoint." Societies 12, no. 5 (2022): 137. http://dx.doi.org/10.3390/soc12050137.

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Controversies are an inseparable part of social systems which, if constructed properly, can create a unique condition for higher-order learning. In addition, design inquiry, as a process of thought and planning, is also a constructive process. This provokes the question of how to construct controversies from a designerly perspective in order to steer higher-order learning. This paper presents a theoretical contribution to the field of social system design by providing the first insights into design intervention to facilitate a network of allied construction. Through a systematic review of the

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20

Scholtz, F. G., P. H. Williams, and J. N. Kriel. "Commutative–non-commutative dualities." Canadian Journal of Physics 98, no. 2 (2020): 158–66. http://dx.doi.org/10.1139/cjp-2018-0887.

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We show that it is in principle possible to construct dualities between commutative and non-commutative theories in a systematic way. This construction exploits a generalization of the exact renormalization group equation (ERG). We apply this to the simple case of the Landau problem and then generalize it to the free and interacting non-canonical scalar field theory. This constructive approach offers the advantage of tracking the implementation of the Lorentz symmetry in the non-commutative dual theory. In principle, it allows for the construction of completely consistent non-commutative and n

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Wawrzycki, J., and T. Wawrzycki. "Representation Structure of the \(\mathrm {SL}(2, \mathbb {C})\) Acting in the Hilbert Space of the Quantum Coulomb Field." Acta Physica Polonica B 56, no. 6 (2025): 1. https://doi.org/10.5506/aphyspolb.56.6-a3.

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We give a complete description of the representation of \(\mathrm {SL}(2,\mathbb {C})\) acting in the Hilbert space of the quantum Coulomb field and a constructive consistency proof of the axioms of the quantum theory of the Coulomb field. Abstract Published by the Jagiellonian University 2025 authors

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22

Amna Fathi Al-Saabneh, Ali Hassan Habayeb, Amna Fathi Al-Saabneh, Ali Hassan Habayeb. "The extent of employment of the constructivist approach on teaching of the grammatical concept from the point of view of teachers of Arabic Language in Jenin Governorate: مدى توظيف المنحى البنائي في تدريس المفاهيم النحوية من وجهة نظر معلمي اللغة العربية في محافظة جنين". مجلة العلوم التربوية و النفسية 6, № 15 (2022): 63–88. http://dx.doi.org/10.26389/ajsrp.l120921.

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This study aimed to investigate the extent of employment of the constructivist approach on teaching of the grammatical concepts from the point of view of teachers of Arabic Language in the Jenin Governorate. To achieve the purposes of the study the researcher followed descriptive analytical method, and a questionnaire was prepared as a tool to collect the data. The researcher checked its validity and reliability. The questionnaire was applied to the study sample which consists of (93) male and female teachers, and those who were selected by the stratified random sampling method from the study

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23

BEESON, MICHAEL. "CONSTRUCTIVE GEOMETRY AND THE PARALLEL POSTULATE." Bulletin of Symbolic Logic 22, no. 1 (2016): 1–104. http://dx.doi.org/10.1017/bsl.2015.41.

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AbstractEuclidean geometry, as presented by Euclid, consists of straightedge-and-compass constructions and rigorous reasoning about the results of those constructions. We show that Euclidean geometry can be developed using only intuitionistic logic. This involves finding “uniform” constructions where normally a case distinction is used. For example, in finding a perpendicular to line L through point p, one usually uses two different constructions, “erecting” a perpendicular when p is on L, and “dropping” a perpendicular when p is not on L, but in constructive geometry, it must be done without

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24

Erler, Jens. "Considerations Concerning the Little Group." Universe 9, no. 9 (2023): 420. http://dx.doi.org/10.3390/universe9090420.

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I very briefly review both the historical and constructive approaches to relativistic quantum mechanics and relativistic quantum field theory, including remarks on the possibility of a non-vanishing photon mass, as well as a foolhardy speculation regarding dark matter.

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Khurram, Shahzad, Anjeela Khurram, and Nyela Ashraf. "Types of mindsets." International Journal of Organizational Analysis 27, no. 3 (2019): 812–32. http://dx.doi.org/10.1108/ijoa-07-2017-1201.

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Purpose This study aims to adopt the institutional theory perspective to understand how institutional inconsistencies experienced by individuals translate into meaninglessness. Moreover, using the constructive development theory, it provides a plausible explanation to the enigma – why do some organizational members develop meaninglessness, while others do not? Design/methodology/approach This conceptual paper is based on a critical evaluation of extant literature that helped to develop the empirically testable propositions. Findings Grounded in the three types of mindsets as proposed in the co

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26

Battle, Guy. "A wavelet-based set of constructive masses for the Minkowskian Feynman propagator." Journal of Mathematical Physics 63, no. 4 (2022): 042303. http://dx.doi.org/10.1063/5.0070534.

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We continue our pursuit of Minkowskian quantum field theory—specifically, a nonperturbative analysis of the characteristic functional generating the time-ordered Wightman distributions for the quartic scalar field interaction. As in a previous paper, our starting point is the Minkowskian Feynman propagator for the free scalar field theory analyzed by a system of expansion functions in space-time. Here, we choose a significantly different system of expansion functions. We start with an L2-orthonormal wavelet basis [Formula: see text], where each Ψ w has the properties of a Daubechies wavelet in

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27

Zhang, Nan, and Hao Wang. "Construction and Research of Constructive English Teaching Model Applying Multimodal Neural Network Algorithm." Computational Intelligence and Neuroscience 2022 (May 26, 2022): 1–13. http://dx.doi.org/10.1155/2022/9144656.

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This article draws on previous research on constructive English teaching models and uses multimodal neural network algorithm theory and constructive English teaching as the theoretical basis, experimental research method, questionnaire survey method, and evaluation method. In this article, we propose a multimodal neural network consisting of a multiscale FCN module and an LSTM module. The network focuses on both the multiscale geometric spatial features and the numerical time-dependent features of the time series curves, and with the comprehensive knowledge of their characteristics, it can bet

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Mervat Farooq Younis and Rufaidah Kamal Abdulmajeed. "Salience and Erasure in Environmental Advertisements: An Ecolinguistic Study." Journal of the College of Education for Women 34, no. 4 (2023): 14–29. http://dx.doi.org/10.36231/coedw.v34i4.1700.

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Ecolinguistics is a twofold field in which ecology and language are its two major concerns. That is, this field is concerned with the way through which our thoughts, ideologies and the like influence the environment. The present study aims at analyzing (6) constructive and destructive environmental advertisements to find out how the techniques of erasure and salience operate in these types of advertisements. It studies the linguistic expressions that achieve these techniques in the constructive and destructive advertisements. The qualitative and quantitative methods are exploited in the curren

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Galanova, Nataliya. "Cuts of a totally ordered field of rational functions over an Archimedean field." Kazakh Mathematical Journal 25, no. 3 (2025): 6–12. https://doi.org/10.70474/trtm5125.

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We study the classification of Dedekind cuts in the field K(α), where K ⊆ ℝ and α is a positive infinitesimal. The cuts are analyzed according to three criteria: fundamentality, symmetry, and algebraicity. We prove that every non-principal cut in K(α) that is both non-fundamental and asymmetric must be algebraic. For such cuts, we construct a sign-changing polynomial whose root realizes the cut. Furthermore, we investigate the properties of these polynomials and their dependence on the structure of the base field K. The results contribute to the broader understanding of algebraic and order-the

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Liu, Jinwang, Dongmei Li, and Licui Zheng. "Minor Prime Factorization for n-D Polynomial Matrices over Arbitrary Coefficient Field." Complexity 2018 (October 8, 2018): 1–9. http://dx.doi.org/10.1155/2018/6235649.

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In this paper, we investigate two classes of multivariate (n-D) polynomial matrices whose coefficient field is arbitrary and the greatest common divisor of maximal order minors satisfy certain condition. Two tractable criterions are presented for the existence of minor prime factorization, which can be realized by programming and complexity computations. On the theory and application, we shall obtain some new and interesting results, giving some constructive computational methods for carrying out the minor prime factorization.

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HEINRICH, GUDRUN. "SECTOR DECOMPOSITION." International Journal of Modern Physics A 23, no. 10 (2008): 1457–86. http://dx.doi.org/10.1142/s0217751x08040263.

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Sector decomposition is a constructive method to isolate divergences from parameter integrals occurring in perturbative quantum field theory. We explain the general algorithm in detail and review its application to multiloop Feynman parameter integrals as well as infrared divergent phase-space integrals over real radiation matrix elements.

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Ивенский, А. А. "TECHNIQUE OF JUSTIFICATION OF ELECTRODYNAMIC AND CONSTRUCTIVE PARAMETERS OF CONSTRUCTIVE ABSORBING MATERIALS OF WAVEGUIDE TYPE." МОДЕЛИРОВАНИЕ, ОПТИМИЗАЦИЯ И ИНФОРМАЦИОННЫЕ ТЕХНОЛОГИИ 7, no. 2(25) (2019): 196–204. http://dx.doi.org/10.26102/2310-6018/2019.25.2.026.

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В работе предложена методика обоснования электродинамических и конструктивных параметров материалов волноводного типа, основанная на разработанной модели поглощения СВЧизлучения на импедансных стенках и диэлектрическом наполнителе конструкционных поглощающих материалов замкнутых волноводных структур. Сущность модели, основанной на методах теории дифракции электромагнитных волн в слоистых средах, законах распространения сверхвысокочастотного излучения в волноводах, заключается в том, что электромагнитное поле перед решеткой рассматривается в виде суперпозиции полей падающей плоской волны, зерка

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Lamanauskas, Vincentas. "THE PARALLELS OF TRADITIONAL AND CONSTRUCTIVE NATURAL SCIENCE EDUCATION." GAMTAMOKSLINIS UGDYMAS / NATURAL SCIENCE EDUCATION 8, no. 1 (2011): 4–7. http://dx.doi.org/10.48127/gu-nse/11.8.04.

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It is obvious that the constructivist perspective is becoming a dominant paradigm in the field of the natural science education. “Constructivism” is not a specific pedagogy but a psychological theory of knowledge. The main idea of this theory is that humans construct knowledge and meaning from their experiences. Central to constructivism is the notion that learners play an active role in ‘constructing’ their own meaning. In general it is true. However, this theory can not be against the traditional way of teaching and learning. Constructivist approaches require learners to be active and confid

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Awodey, Steve. "A Brief Introduction to Algebraic Set Theory." Bulletin of Symbolic Logic 14, no. 3 (2008): 281–98. http://dx.doi.org/10.2178/bsl/1231081369.

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AbstractThis brief article is intended to introduce the reader to the field of algebraic set theory, in which models of set theory of a new and fascinating kind are determined algebraically. The method is quite robust, applying to various classical, intuitionistic, and constructive set theories. Under this scheme some familiar set theoretic properties are related to algebraic ones, while others result from logical constraints. Conventional elementary set theories are complete with respect to algebraic models, which arise in a variety of ways, such as topologically, type-theoretically, and thro

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Simon, Barry. "Twelve tales in mathematical physics: An expanded Heineman prize lecture." Journal of Mathematical Physics 63, no. 2 (2022): 021101. http://dx.doi.org/10.1063/5.0056008.

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This is an extended version of my 2018 Heineman prize lecture describing the work for which I got the prize. The citation is very broad, so this describes virtually all my work prior to 1995 and some afterward. It discusses work in non-relativistic quantum mechanics, constructive quantum field theory, and statistical mechanics.

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Bru, J. B., and W. de Siqueira Pedra. "Universal bounds for large determinants from non-commutative Hölder inequalities in fermionic constructive quantum field theory." Mathematical Models and Methods in Applied Sciences 27, no. 10 (2017): 1963–92. http://dx.doi.org/10.1142/s0218202517500361.

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Efficiently bounding large determinants is an essential step in non-relativistic constructive quantum field theory to prove the absolute convergence of the perturbation expansion of correlation functions in terms of powers of the strength [Formula: see text] of the interparticle interaction. We provide, for large determinants of fermionic covariances, sharp bounds which hold for all (bounded and unbounded, the latter not being limited to semibounded) one-particle Hamiltonians. We find the smallest universal determinant bound to be exactly [Formula: see text]. In particular, the convergence of

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Teslenko, O. K., and M. Y. Bondarchuk. "IMPLEMENTATION OF ARBITRARY BITNESS PERMUTATIONS BASED ON COMBINED CASCADES OF STRUCTURAL UNITS." Information technology and computer engineering 57, no. 2 (2023): 63–77. http://dx.doi.org/10.31649/1999-9941-2023-57-2-63-77.

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The most crucial aspects of permutations are their speed and ease of implementation. This article examines the implementation of arbitrary bitness permutations in computer engineering using a particular class of combination structures with linear complexity, namely, combined cascades of structural units. The reflection formed by this linear structure is identical to that of the corresponding Mealy finite state machine, which allows for the exploration of the properties of structural units and the cascade in the context of the theory of digital automata. The purpose of this permutation is to co

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Cau-Bareille, Dominique, Dominique Lhuilier, and Simon Viviers. "Travail de santé et normativité." La pluralité de normativités en matière de santé et de sécurité du travail 2, no. 1 (2023): 58–91. http://dx.doi.org/10.7202/1098907ar.

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Based on an ergonomic and psychosociological analysis of work, this article aims to clarify the plural concept of normativity in the field of occupational health. After having drawn up a critique of the managerialist normativity that dominates prevention approaches, we will define the links that unite normativity, health and work based on a theorization of work activity. Then, we will propose a definition of "health work" arising from a health construction process grappling with living conditions, work requirements, contextual elements, leeway. This construction presupposes complex trade-offs

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Jamshidpey, Armin, Nicole Lemire, and Éric Schost. "Algebraic construction of quasi-split algebraic tori." Journal of Algebra and Its Applications 19, no. 11 (2019): 2050206. http://dx.doi.org/10.1142/s0219498820502060.

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The main purpose of this work is to give a constructive proof for a particular case of the no-name lemma. Let [Formula: see text] be a finite group, [Formula: see text] a field that is equipped with a faithful [Formula: see text]-action, and [Formula: see text] a sign permutation [Formula: see text]-lattice (see the Introduction for the definition). Then [Formula: see text] acts naturally on the group algebra [Formula: see text] of [Formula: see text] over [Formula: see text], and hence also on the quotient field [Formula: see text]. A well-known variant of the no-name lemma asserts that the i

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Zou, Song Xia. "Research on the Application of Assisted Image Analysis System in the Fusion of Landscape Architecture and Landscape Painting Theory." Advanced Materials Research 791-793 (September 2013): 2018–22. http://dx.doi.org/10.4028/www.scientific.net/amr.791-793.2018.

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With the development of computer technology, art designs are more and more rely on graphic image processing and three-dimensional modeling, especially in landscape designs. How to use assisted image analysis system scientifically is one of hot research topics in the field currently. This article first analyzes the meaning of integration of landscape architecture and landscape painting theory. According to this, it analyzes the application and principle of image analysis auxiliary systems of the integration of landscape architecture and landscape painting theory through the case. It further ana

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Costa, Carla A. "The Status and Future of Sport Management: A Delphi Study." Journal of Sport Management 19, no. 2 (2005): 117–42. http://dx.doi.org/10.1123/jsm.19.2.117.

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Ongoing debates about appropriate foci and growth of sport management research, application, theory, and training are evidence of the field’s growing pains. These growing pains also occur in other fields in which they function as a means to expand and elaborate the paradigms through which fields of inquiry grow and mature. In this study, a panel of 17 leading sport management scholars from around the globe responded to three iterations of a Delphi questionnaire probing their views about the status and future of the field. Panelists agreed that stronger research, additional cross-disciplinary r

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Zhong, Zijin. "Enhancing Learning Efficacy for Chinese Undergraduates Majoring in Music — A Constructive Approach." Journal of Education, Humanities and Social Sciences 30 (April 19, 2024): 26–32. http://dx.doi.org/10.54097/3d4nfy16.

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In 1977, the American psychologist Albert Bandura first proposed the concept of Self-efficacy. Once proposed, this concept has had an impact on several research fields. In the field of music learning, self-efficacy, as the intrinsic psychological motivation in the process of music learning, is an important factor affecting students' music learning. This paper examines the self-efficacy status of undergraduates majoring in Music in China using both quantitative and qualitative approaches. Based on the results of 50 questionnaires and 6 interviews, this study further proposed possible strategies

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INTERLANDO, J. CARMELO, ANDRÉ LUIZ FLORES, and TRAJANO PIRES DA NÓBREGA NETO. "A FAMILY OF ASYMPTOTICALLY GOOD LATTICES HAVING A LATTICE IN EACH DIMENSION." International Journal of Number Theory 04, no. 01 (2008): 147–54. http://dx.doi.org/10.1142/s1793042108001262.

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A new constructive family of asymptotically good lattices with respect to sphere packing density is presented. The family has a lattice in every dimension n ≥ 1. Each lattice is obtained from a conveniently chosen integral ideal in a subfield of the cyclotomic field ℚ(ζq) where q is the smallest prime congruent to 1 modulo n.

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Junaid, Ilham, and Marianna Sigala. "Is online learning effective for practice-based tourism courses? A constructive learning approach." Tourism and hospitality management 30, no. 2 (2024): 225–38. http://dx.doi.org/10.20867/thm.30.2.6.

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Purpose – The aim of this paper is to 1) measure the effectiveness of online learning in practise-based tourism courses, 2) identify the factors that influence the effectiveness of online learning and 3) propose strategies to encourage tourism students to adopt constructive learning in online learning environments. Methodology/Design/Approach – A qualitative methodology was used to analyse data from students participating in an online course entitled “Field Study in Tourism”. Students were surveyed after completing the teaching semester and asked to give their opinions and comments on the effe

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Park, Mingyu, and Sukyoung Lee. "Relationship between Tropical and Extratropical Diabatic Heating and Their Impact on Stationary–Transient Wave Interference." Journal of the Atmospheric Sciences 76, no. 9 (2019): 2617–33. http://dx.doi.org/10.1175/jas-d-18-0371.1.

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Abstract During boreal winter, the climatological stationary wave plays a key role in the poleward transport of heat in mid- and high latitudes. Latent heating is an important driver of boreal-winter stationary waves. In this study, the temporal relationship between tropical and extratropical heating and transient–stationary wave interference is investigated by performing observational data analyses and idealized model experiments. In line with stationary wave theory, the observed heating anomaly fields during constructive interference events have a spatial structure that reinforces the zonal

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AKEROYD, B. SCHROER, and H. W. WIESBROCK. "MODULAR CONSTRUCTIONS OF QUANTUM FIELD THEORIES WITH INTERACTIONS." Reviews in Mathematical Physics 12, no. 02 (2000): 301–26. http://dx.doi.org/10.1142/s0129055x00000113.

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We extend the previously introduced constructive modular method to nonperturbative QFT. In particular the relevance of the concept of "quantum localization" (via intersection of algebras) versus classical locality (via support properties of test functions) is explained in detail, the wedge algebras are constructed rigorously and the formal aspects of double cone algebras for d=1+1 factorizing theories are determined. The well-known on-shell crossing symmetry of the S-Matrix and of formfactors (cyclicity relation) in such theories is intimately related to the KMS properties of new quantum-local

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Koshanov, B. D., A. Baiarystanov, M. Daurenkyzy, and S. O. Turymbet. "GREEN'S FUNCTIONS OF SOME BOUNDARY VALUE PROBLEMS FOR BYHARMONIC OPERATORS AND THEIR CORRECT CONSTRICTIONS." PHYSICO-MATHEMATICAL SERIES 2, no. 336 (2021): 15–23. http://dx.doi.org/10.32014/2021.2518-1726.16.

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In this paper, a constructive method is given for constructing the Green function of the Dirichlet problem for a biharmonic equation in a multidimensional ball. The need to study boundary value problems for elliptic equations is dictated by numerous practical applications in the theoretical study of the processes of hydrodynamics, electrostatics, mechanics, thermal conductivity, elasticity theory, and quantum physics. The distributions of the potential of the electrostatic field are described using the Poisson equation. When studying the vibrations of thin plates of small deflections, biharmon

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Laland, Kevin N., Tobias Uller, Marcus W. Feldman, et al. "The extended evolutionary synthesis: its structure, assumptions and predictions." Proceedings of the Royal Society B: Biological Sciences 282, no. 1813 (2015): 20151019. http://dx.doi.org/10.1098/rspb.2015.1019.

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Scientific activities take place within the structured sets of ideas and assumptions that define a field and its practices. The conceptual framework of evolutionary biology emerged with the Modern Synthesis in the early twentieth century and has since expanded into a highly successful research program to explore the processes of diversification and adaptation. Nonetheless, the ability of that framework satisfactorily to accommodate the rapid advances in developmental biology, genomics and ecology has been questioned. We review some of these arguments, focusing on literatures (evo-devo, develop

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Mast, Jelle, Roel Coesemans, and Martina Temmerman. "Constructive journalism: Concepts, practices, and discourses." Journalism 20, no. 4 (2018): 492–503. http://dx.doi.org/10.1177/1464884918770885.

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Constructive journalism as a (news) philosophy and practice is gaining ground around the globe as both new journalistic ventures and legacy news media variously experiment with so-called ‘constructive’ approaches, and specialized (nonprofit) organizations and training programs have been established. While scholarly interest in the subject has steadily grown accordingly, constructive journalism as a research field in its own right is arguably still in need of further development. Therefore, we set out to explore, advance, and shape a research agenda, and to build a theoretical and empirical fou

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Khachatryan, Kh A., H. S. Petrosyan, and S. M. Andriyan. "On the solubility of a class of two-dimensional integral equations on a quarter plane with monotone nonlinearity." Buletinul Academiei de Ştiinţe a Republicii Moldova. Matematica, no. 2(99) (January 2023): 19–38. http://dx.doi.org/10.56415/basm.y2022.i2.p19.

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In the paper we study a class of two-dimensional integral equations on a quarter-plane with monotone nonlinearity and substochastic kernel. With specific representations of the kernel and nonlinearity, an equation of this kind arises in various fields of natural science. In particular, such equations occur in the dynamical theory of $p$-adic open-closed strings for the scalar field of tachyons, in the mathematical theory of the geographical spread of a pandemic, in the kinetic theory of gases, and in the theory of radiative transfer in inhomogeneous media. \newline We prove constructive theore

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