cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Redshift drift effect through the observation of HI 21cm signal with SKA
Creators: name: Kang, Jiangang
name: Zhang, Tong-Jie
name: He, Peng
name: Zhu, Ming
Publisher: name: arXiv
Year: 2025
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: This study presents the findings of using the Square Kilometre Array (SKA) telescope to measure redshift drift via the HI 21cm signal, employing semi-annual observational interval within redshift around z $\sim$ 1 with main goal is to directly gauge the universe's expansion acceleration rate with millimeter-per-second (mm/s) precision. The SKA can detect over a billion HI 21cm emissions from individual galaxies to the redshift z $\sim$ 2 and thousands of absorption lines from Damped Lyman-alpha (DLA) systems against bright quasars to the redshift z $\sim$ 13, with the sensitivity limit of 100 mJy. By utilizing SKA's high spectral resolution settings (0.001, 0.002, 0.005, 0.01 Hz) to detect redshift drift, particularly focusing on the 0.001 and 0.002 Hz configuration, one aims to achieve the necessary mm/s in precision measurement by the 0.5-year observation period. The velocity drift rate, crucially determined by the two operational regimes within 0.01 to 0.21 mm/s and 0.031 to 0.17 mm/s, respectively, exceeds the theoretical accuracy limit of 1.28 mm/s. The analysis thoroughly restricts cosmological parameters related to dark energy using the Sandage-Loeb (SL) signal from the HI 21cm emission and absorption lines. It estimates $\rm H_0$ of about 70 km/s/Mpc, $\rm Ω_m$ near 0.3, with w close to -1, $\rm w_0$ around -1, and $\rm w_a$ approaching -0.1. These results strongly endorse the SL effect as an effective method for confirming cosmic acceleration and exploring the dark sector in real-time cosmology with the SKA.
description: 13 pages,13 figures,1 table. Accepted for publication on ApJ
Algebraization of Frobenius splitting via quantum groups
Creators: name: Kumar, Shrawan
name: Littelmann, Peter
Publisher: name: arXiv
Year: 2000
Subjects: subject: Quantum Algebra (math.QA)
subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics

description: An important breakthrough in understanding the geometry of Schubert varieties was the introduction of the notion of Frobenius split varieties and the result that the flag varieties G/P are Frobenius split. The aim of this article is to give in this case a complete and self contained representation theoretic approach to this method. The geometric Frobenius method in (char k=p>0) will here be replaced by Lusztig's Frobenius maps for quantum groups at roots of unity (which exist not only for primes but any odd integer \ell >1).
description: 62 pages, published version
Covers and direct limits: a contramodule-based approach
Creators: name: Bazzoni, Silvana
name: Positselski, Leonid
Publisher: name: arXiv
Year: 2019
Subjects: subject: Category Theory (math.CT)
subject: Rings and Algebras (math.RA)
subject: FOS: Mathematics

description: We present applications of contramodule techniques to the Enochs conjecture about covers and direct limits, both in the categorical tilting context and beyond. In the $n$-tilting-cotilting correspondence situation, if $\mathsf A$ is a Grothendieck abelian category and the related abelian category $\mathsf B$ is equivalent to the category of contramodules over a topological ring $\mathfrak R$ belonging to one of certain four classes of topological rings (e.g., $\mathfrak R$ is commutative), then the left tilting class is covering in $\mathsf A$ if and only if it is closed under direct limits in $\mathsf A$, and if and only if all the discrete quotient rings of the topological ring $\mathfrak R$ are perfect. More generally, if $M$ is a module satisfying a certain telescope Hom exactness condition (e.g., $M$ is $Σ$-pure-$\operatorname{Ext}^1$-self-orthogonal) and the topological ring $\mathfrak R$ of endomorphisms of $M$ belongs to one of certain seven classes of topological rings, then the class $\mathsf{Add}(M)$ is closed under direct limits if and only if every countable direct limit of copies of $M$ has an $\mathsf{Add}(M)$-cover, and if and only if $M$ has perfect decomposition. In full generality, for an additive category $\mathsf A$ with (co)kernels and a precovering class $\mathsf L\subset\mathsf A$ closed under summands, an object $N\in\mathsf A$ has an $\mathsf L$-cover if and only if a certain object $Ψ(N)$ in an abelian category $\mathsf B$ with enough projectives has a projective cover. The $1$-tilting modules and objects arising from injective ring epimorphisms of projective dimension $1$ form a class of examples which we discuss.
description: LaTeX 2e with pb-diagram and xy-pic, 58 pages, 5 commutative diagrams. v.1: This paper is based on Sections 11-15 and 19 of the long preprint arXiv:1807.10671v1, which was divided into three parts. v.2: Many important improvements and additions based on new results in arXiv:1909.12203 and particularly in arXiv:1911.11720; new Section 5 inserted. v.4: Final version
Fourier expansions for Eisenstein series twisted by modular symbols and the distribution of multiples of real points on an elliptic curve
Creators: Cowan, Alexander
Publisher: name: Columbia University
Year: 2019
Subjects: subject: Mathematics
subject: FOS: Mathematics
subject: Diophantine approximation
subject: Fourier series
subject: Curves, Elliptic

description: This thesis consists of two unrelated parts.
      In the first part of this thesis, we give explicit expressions for the Fourier coefficients of Eisenstein series E∗(z, s, χ) twisted by modular symbols ⟨γ, f⟩ in the case where the level of f is prime and equal to the conductor of the Dirichlet character χ. We obtain these expressions by computing the spectral decomposition of an automorphic function closely related to E∗(z, s, χ). We then give applications of these expressions. In particular, we evaluate sums such as Σχ(γ)⟨γ, f⟩, where the sum is over γ ∈ Γ∞\Γ0(N) with c^2 + d^2 < X, with c and d being the lower-left and lower-right entries of γ respectively. This parallels past work of Goldfeld, Petridis, and Risager, and we observe that these sums exhibit different amounts of cancellation than what one might expect.
      In the second part of this thesis, given an elliptic curve E and a point P in E(R), we investigate the distribution of the points nP as n varies over the integers, giving bounds on the x and y coordinates of nP and determining the natural density of integers n for which nP lies in an arbitrary open subset of {R}^2. Our proofs rely on a connection to classical topics in the theory of Diophantine approximation.
O'ZBAKISTON TOG'LARIDA TARQALGAN JUNIPERUS L. TURKUMI BOTANIK TAVSIFI, VAKILLARI VA AHAMIYATI
Creators: name: Qosimova, Zebiniso
Publisher: name: Zenodo
Year: 2025

description: Статья посвящена ботаническому описанию растений семейства Juniperus L., распространенных в горах Узбекистана, их представителям и экологическому значению. Род Juniperus — одна из древнейших и экологически важных групп растений. Эти растения в основном встречаются в горных и предгорных регионах, обладают высокой выносливостью и устойчивостью к засухе и холоду. В статье подробно анализируются свойства растений семейства можжевеловых, их биотопы и экологическая роль. Представители Juniperus, особенно Juniperus communis и Juniperus turkestanica, встречаются в Тянь-Шане, Фергане и Зарафшанских горах Узбекистана. Также в статье рассматривается использование растений можжевельника в народной медицине и строительной отрасли, их экономическое и экологическое значение, а также роль в сохранении природы Узбекистана. В статье подчеркивается необходимость повышения значения растений можжевельника в обеспечении экологической стабильности и рациональном использовании природных ресурсов.
Quantum well intermixing by ion implantation
Creators: name: Barnett, Anne
Publisher: name: The Australian National University
Year: 2002
Subjects: Quantum wells
ion implantation
proton
arsenic
boron

description: The work carried out in this study explored the phenomenon of ion implantation induced intermixing in quantum well structures. Two quantum well systems were investigated; the unstrained GaAs/Al_xGa_(1-x)As system, and the strained In_xGa_(1-x)As/GaAs system. Previous results from proton and arsenic implantation into these systems were verified, and new work on Boron implantation was conducted to test the medium mass ion regime.
Awards Banquet keynote address
Creators: name: Marshall, R. T.
Publisher: name: The University of British Columbia
Year: 2009

description: I also believe that at times like these we, as an industry, must work together with government to move forward. I am not suggesting that we look to reduce the Province's income but to examine some of the legislation that applies to our industry for possible areas where we could be more cost effective. In this regard, I must commend the B.C. Mining Association for undertaking the review of The Minerals Act, and, also as an illustration of industry co-operation, point out that the B.C. Mining Association and the Coal Association of Canada are jointly involved in reviewing some of the legislation to identify areas that need updating: again on a practical basis from both the standpoint of industry and government. I believe this approach makes a lot of sense and might form a model for the future. There are many areas where duplication of effort can be eliminated and through co-operation the same objectives accomplished at less cost. With respect to Canada's coal industry...[it is our] largest energy resource and will continue to play an important role.
On the Number of Embeddings of Minimally Rigid Graphs
Creators: name: Borcea, Ciprian
name: Streinu, Ileana
Publisher: name: arXiv
Year: 2002
Subjects: subject: Metric Geometry (math.MG)
subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 52C25, 52C45, 05C10

description: Rigid frameworks in some Euclidian space are embedded graphs having a unique local realization (up to Euclidian motions) for the given edge lengths, although globally they may have several. We study the number of distinct planar embeddings of minimally rigid graphs with $n$ vertices. We show that, modulo planar rigid motions, this number is at most ${{2n-4}\choose {n-2}} \approx 4^n$. We also exhibit several families which realize lower bounds of the order of $2^n$, $2.21^n$ and $2.88^n$. For the upper bound we use techniques from complex algebraic geometry, based on the (projective) Cayley-Menger variety $CM^{2,n}(C)\subset P_{{{n}\choose {2}}-1}(C)$ over the complex numbers $C$. In this context, point configurations are represented by coordinates given by squared distances between all pairs of points. Sectioning the variety with $2n-4$ hyperplanes yields at most $deg(CM^{2,n})$ zero-dimensional components, and one finds this degree to be $D^{2,n}={1/2}{{2n-4}\choose {n-2}}$. The lower bounds are related to inductive constructions of minimally rigid graphs via Henneberg sequences. The same approach works in higher dimensions. In particular we show that it leads to an upper bound of $2 D^{3,n}= {\frac{2^{n-3}}{n-2}}{{n-6}\choose{n-3}}$ for the number of spatial embeddings with generic edge lengths of the 1-skeleton of a simplicial polyhedron, up to rigid motions.
Structural Damage Detection Using Wavelet Packet Transform and Improved Peak-Picking Method
Creators: name: Fakharian, Pouyan
Publisher: name: figshare
Year: 2019
Subjects: subject: 90506 Structural Engineering
subject: FOS: Civil engineering

description: After world war the second, building industry has developed greatly. However, aging and other internal and external effects cause structural damage and serious problems and even structural collapse. So, in recent decades, structural health monitoring has been considered extensively. Vibration response processing is one of the damage detection methods. Because of development in signal processing, this method has been considered strongly. Structural Health Monitoring (SHM) aims to give, at every moment during the life of a structure, a diagnosis of the state of the constituent materials, of the different parts, and of the full assembly of these parts constituting the structure as a whole. The state of the structure must remain in the domain specified in the design, although this can be altered by normal aging due to usage, by the action of the environment, and by accidental events. Thanks to the time-dimension of monitoring, which makes it possible to consider the full history database of the structure, and with the help of Usage Monitoring, it can also provide a prognosis (evolution of damage, residual life, etc.). If we consider only the first function, the diagnosis, we could estimate that Structural Health Monitoring is a new and improved way to make a Non-Destructive Evaluation. This is partially true, but SHM is much more. It involves the integration of sensors, possibly smart materials, data transmission, computational power, and processing ability inside the structures. It makes it possible to reconsider the design of the structure and the full management of the structure itself and of the structure considered as a part of wider systems. In this study a combined method is introduced in order to damage detection and estimation of its location and severity. In this method, at first, in order to elimination of possible noise, vibration response is processed using wavelet packet transform. After that, acceleration response in each DOF is estimated based on response of its neighbor DOFs using ARMAX model. If there is any damage around that DOF, estimated and recorded response would be different. This mismatch has direct relationship with damage extension. Surveying changes in stiffness or flexibility structural matrix could be a suitable approach for damage extension estimation. Because of inverse relationship between flexibility matrix and natural frequencies, flexibility matrix could be estimated properly using limited number of structural modes. In this study, peak picking method is implemented for natural frequencies and mode shapes identification. Comparison of flexibility matrix in different situation could be a proper index for structural state. In this study, flexibility matrix change in a DOF is used as damage index.
Schur sector of Argyres-Douglas theory and $W$-algebra
Creators: name: Xie, Dan
name: Yan, Wenbin
Publisher: name: arXiv
Year: 2019
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Quantum Algebra (math.QA)
subject: Representation Theory (math.RT)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: We study the Schur index, the Zhu's $C_2$ algebra, and the Macdonald index of a four dimensional $\mathcal{N}=2$ Argyres-Douglas (AD) theories from the structure of the associated two dimensional $W$-algebra. The Schur index is derived from the vacuum character of the corresponding $W$-algebra and can be rewritten in a very simple form, which can be easily used to verify properties like level-rank dualities, collapsing levels, and S-duality conjectures. The Zhu's $C_2$ algebra can be regarded as a ring associated with the Schur sector, and a surprising connection between certain Zhu's $C_2$ algebra and the Jacobi algebra of a hypersurface singularity is discovered. Finally, the Macdonald index is computed from the Kazhdan filtration of the $W$-algebra.
description: 36 pages, 3 figures
Preventing Household Bankruptcy: The One-Third Rule in Financial Planning with Mathematical Validation and Game-Theoretic Insights
Creators: name: Godbole, Aditi
name: Shah, Zubin
name: Mudholkar, Ranjeet S.
Publisher: name: arXiv
Year: 2025
Subjects: subject: General Finance (q-fin.GN)
subject: FOS: Economics and business

description: This paper analyzes the 1/3 Financial Rule, a method of allocating income equally among debt repayment, savings, and living expenses. Through mathematical modeling, game theory, behavioral finance, and technological analysis, we examine the rule's potential for supporting household financial stability and reducing bankruptcy risk. The research develops theoretical foundations using utility maximization theory, demonstrating how equal allocation emerges as a solution under standard economic assumptions. The game-theoretic analysis explores the rule's effectiveness across different household structures, revealing potential strategic advantages in financial decision-making. We investigate psychological factors influencing financial choices, including cognitive biases and neurobiological mechanisms that impact economic behavior. Technological approaches, such as AI-driven personalization, blockchain tracking, and smart contract applications, are examined for their potential to support financial planning. Empirical validation using U.S. Census data and longitudinal studies assesses the rule's performance across various household types. Stress testing under different economic conditions provides insights into its adaptability and resilience. The research integrates mathematical analysis with behavioral insights and technological perspectives to develop a comprehensive approach to household financial management.
Electronic, Excitonic and Polaritonic Properties of Hybrid Metal-Halide Perovskites
Creators: name: OLDFIELD, MITKO
Publisher: name: Monash University
Year: 2024
Subjects: classificationCode: 400803
subject: Electrical energy generation (incl. renewables, excl. photovoltaics)
classificationCode: 510805
subject: Quantum technologies

description: The electronic, excitonic and polaritonic properties of hybrid metal-halide perovskites were investigated using multiple spectroscopic techniques. Herein, we compare charge-carrier interactions in two different hybrid perovskites that have strong potential for use in solar cells. Further, we fabricate and investigate perovskite-based systems that are cost-effective, easy-to-make and readily scalable. These systems allow charge-carriers to flow without resistance through the quantum interaction of light and matter - and are a promising platform for electronic circuits that do not heat up when used - reducing global greenhouse emissions. This is the first instance of this phenomenon in a readily-scalable system.
Unforeseen Evidence
Creators: name: Piermont, Evan
Publisher: name: arXiv
Year: 2019
Subjects: subject: Theoretical Economics (econ.TH)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Economics and business
subject: FOS: Computer and information sciences

description: I propose a normative updating rule, extended Bayesianism, for the incorporation of probabilistic information arising from the process of becoming more aware. Extended Bayesianism generalizes standard Bayesian updating to allow the posterior to reside on richer probability space than the prior. I then provide an observable criterion on prior and posterior beliefs such that they were consistent with extended Bayesianism.
Additional file 5 of Self-assembled peptide-substance P hydrogels alleviate inflammation and ameliorate the cartilage regeneration in knee osteoarthritis
Creators: name: Kim, Sang Jun
name: Kim, Ji Eun
name: Choe, Goeun
name: Song, Da Hyun
name: Kim, Sun Jeong
name: Kim, Tae Hee
name: Yoo, Jin
name: Kim, Soo Hyun
name: Jung, Youngmee
Publisher: name: figshare
Year: 2023
Subjects: subject: Biochemistry
subject: Medicine
subject: Physiology
subject: FOS: Biological sciences
subject: Biotechnology
subject: Environmental Sciences not elsewhere classified
subject: Chemical Sciences not elsewhere classified
subject: Ecology
subject: Immunology
subject: FOS: Clinical medicine

description: Supplementary Material 5
Coexistence of superconductivity and excitonic ferromagnetism
Creators: name: Brydon, Philip
Publisher: name: The Australian National University
Year: 2002
Subjects: supercondutivity
excitonic ferromagnetism

description: In this thesis, we present the results of an investigation into the appearance of superconductivity in the excitonic ferromagnet. We find that such a coexistence is possible at zero temperature within the self-consistent hartree-Fock approximation.
The Elliptic Billiard: Subtleties of Separability
Creators: name: van Zon, R.
name: Ruijgrok, Th. W.
Publisher: name: arXiv
Year: 1997
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: Some of the subtleties of the integrability of the elliptic quantum billiard are discussed. A well known classical constant of the motion has in the quantum case an ill-defined commutator with the Hamiltonian. It is shown how this problem can be solved. A geometric picture is given revealing why levels of a separable system cross. It is shown that the repulsions found by Ayant and Arvieu are computational effects and that the method used by Traiber et al. is related to the present picture which explains the crossings they find. An asymptotic formula for the energy-levels is derived and it is found that the statistical quantities of the spectrum P(s) and Δ(L) have the form expected for an integrable system.
description: 10 pages, LaTeX, 3 Figures (postscript). Submitted to European Journal of Physics
Four essays on strategic communication
Creators: Loginova, Uliana
Publisher: name: Columbia University
Year: 2012
Subjects: Economics

description: This dissertation studies patterns of strategic communication in cases, in which the involved parties disagree in their preferences or opinions. In Chapter 1, I study a model of strategic communication in networks, in which the players diverge in their preferences and information can be communicated either through a costly verifiable information (hard) channel or through a low-cost cheap talk (soft) channel. I find that the availability of hard links allows each agent to get a weakly greater number of truthful messages compared to the pure cheap talk setting. If only one party bears the cost of a hard link, then introducing hard links increases the total expected welfare. In contrast, if the cost of a hard link is shared by both parties, then allowing for verifiable communication can decrease the total welfare. In Chapter 2, I consider a model of strategic cheap talk communication in networks, in which the players can disagree in their preferences or their opinions. I find that the information transmission pattern crucially depends on the nature of the disagreement. If the agents diverge in their preferences, then information transmission exhibits a negative externality effect: greater information obtained by some agent discourages further information accumulation by harming the credibility of other agents. In contrast, information transmission displays a positive externality effect when the agents have divergent opinions: greater information obtained by some agent encourages further information accumulation by improving the credibility of other agents. Chapter 3 studies a benevolent authority's decision to constrain or inform a population of individuals. It demonstrates that the authority's decision to regulate an activity depends on whether she deems it a matter of preference or opinion. In the former case, the benevolent authority is libertarian: she gives truthful advice and safeguards liberty. In the latter case, the benevolent authority is paternalistic:  believing that she acts in the individuals' best interest, the authority forces another action than the individuals would choose for themselves. In Chapter 4, I consider communication between an informed Sender and an uninformed Receiver. The Sender has a preference bias and is guilt averse to letting down the Receiver's payoff expectations. I show that no separating equilibrium exists; rather, in case of uniform state of the world and quadratic utilities, I demonstrate that there exist partition equilibria (as in Crawford and Sobel (1982)). An increase in the guilt aversion intensity is akin a decrease in the preference divergence: higher guilt aversion intensity allows for more intervals in the equilibrium partition; and holding the number of elements in the partition fixed, greater guilt aversion intensity results in more balanced intervals.
Opto-mechanical noise cancellation
Creators: name: Mow-Lowry, C
Publisher: name: The Australian National University
Year: 2002
Subjects: Physics Honours thesis. Interferometry. Gravitational wave detection
opto-mechanical noise cancellation

description: The experiments presented in this thesis investigate the interaction between radiation and an optical cavity, in which one mirror of the cavity is mounted on a flexure which could be moved by radiation pressure. The cavity was shown to exhibit non-linear behaviour with high input power. The radiation pressure force was shown to change the mechanical resonance frequency of the moveable mirror. Motion was induced through amplitude modulation of a high power input beam and the extent of this motion measured using the cavity control loop. To demonstrate the way quantum correlations could be used to beat the SQL, the laser light incident on the cavity was prepared, using classical modulation techniques, with classical correlations between the quadratures that cause shot noise and radiation pressure noise. A level of modulation much higher than the quantum level was used to make the cancellation effects more visible. The effect of radiation pressure induced motion was cancelled by the addition of correlated frequency modulation. The input amplitude was then modulated by a white noise source. The resulting noise was partially cancelled when the same white noise source was used to drive the frequency modulator with a dierent phase. This cancellation demonstrably improved the signal to noise ratio of a signal injected into the system.
Companilactobacillus alimentarius Zheng, Wittouck, Salvetti, Franz, Harris, Mattarelli, O'Toole, Pot, Vandamme, Walter, Watanabe, Wuyts, Felis, Gänzle & Lebeer, 2020, COMB. NOV.
Creators: name: Zheng, Jinshui
name: Wittouck, Stijn
name: Salvetti, Elisa
name: Franz, Charles M. A. P.
name: Harris, Hugh M. B.
name: Mattarelli, Paola
name: O'Toole, Paul W.
name: Pot, Bruno
name: Vandamme, Peter
name: Walter, Jens
name: Watanabe, Koichi
name: Wuyts, Sander
name: Felis, Giovanna E.
name: Gänzle, Michael G.
name: Lebeer, Sarah
Publisher: name: Zenodo
Year: 2020
Subjects: Biodiversity
Taxonomy
Bacteria
Firmicutes
Bacilli
Lactobacillales
Lactobacillaceae
Companilactobacillus
Companilactobacillus alimentarius

description: DESCRIPTION OF COMPANILACTOBACILLUS ALIMENTARIUS COMB. NOV.
 Companilactobacillus alimentarius (a.li.men.ta'ri.us. L. masc. adj. alimentarius related to food).
 Basonym: Lactobacillus alimentarius (ex Reuter 1970) Reuter 1983a, 672 VP
Growth is observed between 15 and 37°C and with pentoses, hexoses and disaccharides as carbon sources [115]. The genome size is 2.34 Mbp. The mol% G+C content of DNA is 35.4.
 Isolated as spoilage organisms from marinated fish products, as fermentation organisms in fermented sausages, as spoilage organism in ready-to-eat meats. A strain of the species had been used as biopreservatives culture [116]. It occurs in association with Fructilactobacillus sanfranciscensis in type I sourdoughs [114] and was isolated in other plant fermentations.
 The type strain is R13 T = ATCC 29643 T = CCUG 30672 T = CIP 102986 T = DSM 20249 T = JCM 1095 T = LMG 9187 T.
Genome sequence accession number: AZDQ00000000.
16S RNA gene sequence accession number: M58804.
description: Published as part of Zheng, Jinshui, Wittouck, Stijn, Salvetti, Elisa, Franz, Charles M. A. P., Harris, Hugh M. B., Mattarelli, Paola, O'Toole, Paul W., Pot, Bruno, Vandamme, Peter, Walter, Jens, Watanabe, Koichi, Wuyts, Sander, Felis, Giovanna E., Gänzle, Michael G. & Lebeer, Sarah, 2020, A taxonomic note on the genus Lactobacillus: Description of 23 novel genera, emended description of the genus Lactobacillus Beijerinck 1901, and union of Lactobacillaceae and Leuconostocaceae, pp. 2782-2858 in International Journal of Systematic and Evolutionary Microbiology 70 (4) on page 2803, DOI: 10.1099/ijsem.0.004107, http://zenodo.org/record/10114954
Fourier transform of Rauzy fractals and point spectrum of 1D Pisot inflation tilings
Creators: name: Baake, Michael
name: Grimm, Uwe
Publisher: name: arXiv
Year: 2019
Subjects: subject: Metric Geometry (math.MG)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 11K70, 42B10, 52C23, 37B10, 37F25, 28A80

description: Primitive inflation tilings of the real line with finitely many tiles of natural length and a Pisot--Vijayaraghavan unit as inflation factor are considered. We present an approach to the pure point part of their diffraction spectrum on the basis of a Fourier matrix cocycle in internal space. This cocycle leads to a transfer matrix equation and thus to a closed expression of matrix Riesz product type for the Fourier transforms of the windows for the covering model sets. In general, these windows are complicated Rauzy fractals and thus difficult to handle. Equivalently, this approach permits a construction of the (always continuously representable) eigenfunctions for the translation dynamical system induced by the inflation rule. We review and further develop the underlying theory, and illustrate it with the family of Pisa substitutions, with special emphasis on the Tribonacci case.
description: 31 pages, several figures; revised version
Constructions of Smooth 4-Manifolds
Creators: name: Fintushel, Ronald
name: Stern, Ronald J.
Publisher: name: arXiv
Year: 1999
Subjects: subject: Geometric Topology (math.GT)
subject: Symplectic Geometry (math.SG)
subject: FOS: Mathematics
subject: 57R55

description: We describe a collection of constructions which illustrate a panoply of ``exotic'' smooth 4-manifolds.
description: This article appeared in the Proceedings of the 1998 ICM Doc.Math.J.DMV Extra Volume ICM II (1998) 443-452
Reconciling fractional entropy and black hole entropy compositions
Creators: name: Manoharan, Manosh T.
name: Shaji, N.
Publisher: name: arXiv
Year: 2025
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: This study investigates the implications of adopting fractional entropy in the area law framework and demonstrates its natural alignment with an isothermal description of black hole composition. We discuss the Zeroth law compatibility of the fractional entropy and define an empirical temperature for the horizon. We highlight the distinction between the empirical and conventional Hawking temperatures associated with the black holes. Unlike the Hawking temperature, this empirical temperature appears universal, and its proximity to the Planck temperature suggests a possible quantum gravity origin. We also establish the connection between these temperatures. Furthermore, extending the conventional fractional parameter $q$, constrained between 0 and 1, we establish that any positive real number can bound $q$ under the concavity condition, provided the log of micro-state dimensionality exceeds $q-1$. Specifically, for black holes, $q = 2$, necessitating micro-state dimensionality greater than $e$, thereby excluding the construction of black hole horizon states with two level bits or qubits. We also identify the connection between the validity of the second law and information fluctuation complexity. The second law requires that the variance of information content remain smaller than the area of the black hole horizon. This constraint naturally gives rise to a Boltzmann-Gibbs-like entropy for the black hole, which, in contrast to the canonical formulation, is associated with its mass rather than its area. Equilibrium distribution analysis uncovers multiple configurations, in which the one satisfying the prerequisites of probability distribution exhibits an exponent stretched form, revealing apparent deviation from the Boltzmann distribution.
description: 13 pages, under journal review, Comments and suggestions are welcome
Fractal Hofstadter Band Structure in Patterned Dielectric Superlattice Graphene Systems
Creators: Forsythe, Carlos
Publisher: name: Columbia University
Year: 2017
Subjects: subject: Condensed matter
subject: Nanotechnology
subject: FOS: Nanotechnology
subject: Electrical engineering
subject: Superlattices as materials
subject: Dielectrics

description: The development and characterization of lithographically patterned dielectric superlattice systems are presented, which have enabled the first clear realization of fully developed fractal mini-gaps owing to the interplay between a quantizing magnetic field and a lithographically defined spatial superlattice potential. Following a history of lateral superlattice gating on 2-D electron gas systems, we present patterned dielectric superlattice graphene systems of unmatched quality, allowing for the characterization of Hofstadter fractal band structure under triangular and square lattice geometries. Hexagonal boron nitride, graphene heterostructures are uniquely suited to integration with patterned gating structures, due to their high mobility and thin encapsulating dielectric environment. These systems have already been utilized for the observation of Hofstadter’s fractal spectrum through the moiré superlattice effect, but such systems are limited in their tunability. The patterned dielectric superlattice allows for control of the superlattice geometry, polarity, and strength. Utilizing this control, we compare the resultant fractal spectra from both triangular and square superlattice potentials, which confer unique gap structures in agreement with their lattice symmetry. More generally, patterned dielectric superlattices can be used to generate a variety of spatially dependent scalar potentials onto van der Waals heterostructures with length scales of order 10nm, while maintaining low disorder.
Sorption and reduction of chromate ions by the chelating ion exchanger Diaion CR 20
Creators: name: Wójcik, Grzegorz
Publisher: name: Faculty of Geoengineering, Mining and Geology, Wrocław University of Technology, Wrocław
Year: 2019
Subjects: reduction, speciation, ion exchange, chromium (III), chromate (VI), chelating resin

description: Physicochemical Problems of Mineral Processing; ISSN 2084-4735
Needs assessment of forestry education in Laos: the case of Souphanouvong University
Creators: name: Park, Mi Sun
name: Sojin, Youn
name: Yeo-Chang, Youn
name: Beun Donsavanh
name: Bounxian Phetlumphan
Publisher: name: Taylor & Francis
Year: 2019
Subjects: subject: Neuroscience
subject: Ecology
subject: FOS: Biological sciences
subject: Sociology
subject: FOS: Sociology
subject: Science Policy
subject: Hematology

description: Managing forest resources can be realized when the social conditions, including institutional arrangements and social capacity, are adequately prepared. Human capacity is one of the key conditions required for sustainable forest management. Higher education institutions in developing countries offer forestry programs to build human capacity for sustainable forest management. As society undergoes social and economic changes, forestry professionals must adapt to the appropriate expertise required for new roles. This paper aims to assess the needs of higher education in forestry to revise forestry curriculum at Souphanouvong University towards improving specific and general capacity of forestry professionals in the Laos. The expected expertise of forestry professionals and gaps in forestry curriculum were assessed by a questionnaire survey with university faculty members and forestry governmental officials. Priority in importance and adequacy of curriculum contents necessary for forestry-specific and generic competencies was measured. The study showed the needs of the forestry curriculum at Souphanouvong University in the Laos with the following four areas of competencies: (1) comprehensive forest management considering multiple forest services and global negotiations, (2) forest management planning technology, (3) field skills and teamwork, and (4) problem solving and social relations. The proposed changes of forestry curriculum to meet the needs of forestry higher education can be applied for revising forestry curriculum in Laos and other countries.
The Dynamics of a Genetic Algorithm for a Simple Learning Problem
Creators: name: Rattray, Magnus
name: Shapiro, Jonathan
Publisher: name: arXiv
Year: 1996
Subjects: subject: Condensed Matter (cond-mat)
subject: Adaptation and Self-Organizing Systems (nlin.AO)
subject: FOS: Physical sciences

description: A formalism for describing the dynamics of Genetic Algorithms (GAs) using methods from statistical mechanics is applied to the problem of generalization in a perceptron with binary weights. The dynamics are solved for the case where a new batch of training patterns is presented to each population member each generation, which considerably simplifies the calculation. The theory is shown to agree closely to simulations of a real GA averaged over many runs, accurately predicting the mean best solution found. For weak selection and large problem size the difference equations describing the dynamics can be expressed analytically and we find that the effects of noise due to the finite size of each training batch can be removed by increasing the population size appropriately. If this population resizing is used, one can deduce the most computationally efficient size of training batch each generation. For independent patterns this choice also gives the minimum total number of training patterns used. Although using independent patterns is a very inefficient use of training patterns in general, this work may also prove useful for determining the optimum batch size in the case where patterns are recycled.
description: 28 pages, 4 Postscript figures. Latex using IOP macros ioplppt and iopl12 which are included. To appear in Journal of Physics A. Also available at ftp://ftp.cs.man.ac.uk/pub/ai/jls/GAlearn.ps.gz and http://www.cs.man.ac.uk/~jls
Untitled Item
Creators: name: Fakharian, Pouyan
Publisher: name: figshare
Year: 2019
Subjects: subject: 90506 Structural Engineering
subject: FOS: Civil engineering

description: After world war the second, building industry has developed greatly. However, aging and other internal and external effects cause structural damage and serious problems and even structural collapse. So, in recent decades, structural health monitoring has been considered extensively. Vibration response processing is one of the damage detection methods. Because of development in signal processing, this method has been considered strongly. Structural Health Monitoring (SHM) aims to give, at every moment during the life of a structure, a diagnosis of the state of the constituent materials, of the different parts, and of the full assembly of these parts constituting the structure as a whole. The state of the structure must remain in the domain specified in the design, although this can be altered by normal aging due to usage, by the action of the environment, and by accidental events. Thanks to the time-dimension of monitoring, which makes it possible to consider the full history database of the structure, and with the help of Usage Monitoring, it can also provide a prognosis (evolution of damage, residual life, etc.). If we consider only the first function, the diagnosis, we could estimate that Structural Health Monitoring is a new and improved way to make a Non-Destructive Evaluation. This is partially true, but SHM is much more. It involves the integration of sensors, possibly smart materials, data transmission, computational power, and processing ability inside the structures. It makes it possible to reconsider the design of the structure and the full management of the structure itself and of the structure considered as a part of wider systems. In this study a combined method is introduced in order to damage detection and estimation of its location and severity. In this method, at first, in order to elimination of possible noise, vibration response is processed using wavelet packet transform. After that, acceleration response in each DOF is estimated based on response of its neighbor DOFs using ARMAX model. If there is any damage around that DOF, estimated and recorded response would be different. This mismatch has direct relationship with damage extension. Surveying changes in stiffness or flexibility structural matrix could be a suitable approach for damage extension estimation. Because of inverse relationship between flexibility matrix and natural frequencies, flexibility matrix could be estimated properly using limited number of structural modes. In this study, peak picking method is implemented for natural frequencies and mode shapes identification. Comparison of flexibility matrix in different situation could be a proper index for structural state. In this study, flexibility matrix change in a DOF is used as damage index.
title: Books as Cultural Diplomacy, A Case Study of The British Foreign Office’s Information Research Department (IRD), 1948–1956
Creators: name: Igrek, Musa
Publisher: name: Goldsmiths, University of London
Year: 2023

description: This dissertation aims to demonstrate how books functioned as a form of cultural diplomacy during the early years of the Cold War, between 1948 and 1956. This is achieved using the Information Research Department (IRD) of the UK Foreign Office (FO) as a case study. This thesis analyses the UK’s early Cold War foreign policy and examines how books have promoted national identity. The examination of the IRD’s activities during the early Cold War period reveals how the UK government developed specific strategies of cultural representation and narrative to inform and influence both domestic and foreign audiences and to maintain and enhance its attractive image. In order to develop a theoretical framework linking power relations to the promotion and construction of national identity through public and cultural diplomacy activities, the research has applied Gramsci’s concept of hegemony based on moral and intellectual leadership. This thesis contributes to a stronger understanding of: how the IRD’s funding and distribution of books were used to promote and (re)construct the UK’s national identity in the early years of the Cold War; how books promoted a favourable national image abroad; how these books functioned as an effective tool for the UK to carry out its ‘role’ as a global power both at home and abroad – to maintain and reproduce its hegemony; how these books helped the political elites disseminate their preferred messages; and how intellectuals and private organisations were involved in this book-publishing strategy. The thesis has demonstrated how foreign policy preferences were organically and fundamentally connected with elite-constructed conceptions of national identity and that public and cultural diplomacy played a substantial role in projecting, promoting and protecting these conceptions. The study also provides an example of how public and cultural diplomacy projects were designed and worked upon both by official and non-official actors. The data used in this thesis comes primarily from the archival collection of the IRD’s files covering the period of 1948–1956, which are available at the National Archives in London. Additionally, a small but significant amount of data comes from newly released (April 2018) material from the University of Reading's Special Collections of Archives and Rare Books.
Modeling gamma-ray light curves with more realistic pulsar magnetospheres
Creators: name: Cao, Gang
name: Yang, Xiongbang
Publisher: name: arXiv
Year: 2019
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We study the gamma-ray emission patterns and light curves in dissipative pulsar magnetospheres. We produce the gamma-ray light curves by using the geometric method and the particle trajectory method. For the geometric method, assuming the gamma-ray emission originates in a finite-width layer along the last closed lines, we generate the gamma-ray light curves based on the uniform emissivity along the magnetic field lines in the comoving frame (CF). For the particle trajectory method, we consider the spatial distribution of conductivity $σ$ by assuming a very high conductivity within the light cylinder and a finite conductivity outside the light cylinder (LC). Assuming that all the $γ$-ray emission originates in the outer magnetosphere outside the LC, we generate the gamma-ray light curves by computing realistic particle trajectories and Lorentz factors, taking into account both the accelerating electric field and curvature radiation loss. Further, we compare the modeling light curves to the observed light curves at $>0.1\, \rm GeV$ energies for Vela pulsar. Our results show that the magnetosphere with the low $σ$ value is more preferred for the geometric method. However, the magnetosphere with a near force-free regime within the LC and a high $σ$ value outside the LC is more favored for the particle trajectory method. It is noted that the particle trajectory method uses the parallel electric fields that are self-consistent with the magnetic fields of the magnetosphere. We suggest that the results from the particle trajectory method are more supported on the physical ground.
description: Accepted for publication in ApJ
Correlation-Hole Method for Spectra of Superconducting Microwave Billiards
Creators: name: Alt, H.
name: Graef, H. -D.
name: Hofferbert, R.
name: Rehfeld, H.
name: Richter, A.
name: Guhr, T.
name: Harney, H. L.
name: Schardt, P.
Publisher: name: arXiv
Year: 1997
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: The spectral fluctuation properties of various two- and three-dimensional superconducting billiard systems are investigated by employing the correlation-hole method. It rests on the sensitivity of the spectral Fourier transform to long range correlations and is thus an alternative technique to study chaotic dynamics. First, we apply the method to the eigenfrequencies which are extracted from the measured resonances. Second, we analyze the unfolded raw spectra, including the shape of the resonances. The merit of the method lies in a clear separation of the statistics due to the positions and due to the shape of the resonances. However, we show that statistical fluctuations of the intensities of the resonances have a strong impact on the observable. Therefore, the visibility of the correlation hole is studied as a function of the number of independent statistical variables entering into the intensities. The visibility improves if independent spectra are superimposed.
description: 12 pages (Latex) including 10 postscript figures; to be published in Phys. Rev. E; Info: hofferbert@linac.ikp.physik.th-darmstadt.de