cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Skew characteristic polynomial of graphs and embedded graphs
Creators: name: Dogra, R.
name: Lando, S.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics

description: We introduce a new one-variable polynomial invariant of graphs, which we call the skew characteristic polynomial. For an oriented simple graph, this is just the characteristic polynomial of its anti-symmetric adjacency matrix. For nonoriented simple graphs the definition is different, but for a certain class of graphs (namely, for intersection graphs of chord diagrams), it gives the same answer if we endow such a graph with an orientation induced by the chord diagram. We prove that this invariant satisfies Vassiliev's $4$-term relations and determines therefore a finite type knot invariant. We investigate the behaviour of the polynomial with respect to the Hopf algebra structure on the space of graphs and show that it takes a constant value on any primitive element in this Hopf algebra. We also provide a two-variable extension of the skew characteristic polynomial to embedded graphs and delta-matroids. The $4$-term relations for the extended polynomial prove that it determines a finite type invariant of multicomponent links.
Decoupling Braided Tensor Factors
Creators: name: Fiore, Gaetano
name: Steinacker, Harold
name: Wess, Julius
Publisher: name: arXiv
Year: 2000
Subjects: subject: Quantum Algebra (math.QA)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 81R50; 17B37

description: We briefly report on our result that the braided tensor product algebra of two module algebras $A_1,A_2$ of a quasitriangular Hopf algebra $H$ is equal to the ordinary tensor product algebra of $H_1$ with a subalgebra isomorphic to $A_2$ and commuting with $A_1$, provided there exists a realization of $H$ within $A_1$. As applications of the theorem we consider the braided tensor product algebras of two or more quantum group covariant quantum spaces or deformed Heisenberg algebras.
description: LaTex file, 12 pages. Talk given at the 23-rd International Conference on Group Theory Methods in Physics, Dubna (Russia), August 2000
Higher winding number in a non-unitary photonic quantum walk
Creators: name: Xiao, Lei
name: Qiu, Xingze
name: Wang, Kunkun
name: Bian, Zhihao
name: Zhan, Xiang
name: Obuse, Hideaki
name: Sanders, Barry C.
name: Yi, Wei
name: Xue, Peng
Publisher: name: arXiv
Year: 2018
Subjects: subject: Quantum Physics (quant-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Topological matter exhibits exotic properties yet phases characterized by large topological invariants are difficult to implement, despite rapid experimental progress. A promising route toward higher topological invariants is via engineered Floquet systems, particularly in photonics, where flexible control holds the potential of extending the study of conventional topological matter to novel regimes. Here we implement a one-dimensional photonic quantum walk to explore large winding numbers. By introducing partial measurements and hence loss into the system, we detect winding numbers of three and four in multi-step non-unitary quantum walks, which agree well with theoretical predictions. Moreover, by probing statistical moments of the walker, we identify locations of topological phase transitions in the system, and reveal the breaking of pseudo-unitary near topological phase boundaries. As the winding numbers are associated with non-unitary time evolution, our investigation enriches understanding of topological phenomena in non-unitary settings.
description: 15 pages, 12 figures
One-dimensional Kondo lattice model as a Tomonaga-Luttinger liquid
Creators: name: Shibata, N.
name: Tsvelik, A.
name: Ueda, K.
Publisher: name: arXiv
Year: 1997
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Arguments are presented that in the one-dimensional Kondo lattice model f-electron spins participate in filling of the Fermi sea. It is shown that in its paramagnetic phase this model belongs to the spin-1/2 Tomonaga-Luttinger liquid universality class. The ratio of the spin and charge velocities v_s/v_c and K_c are estimated to be of the order of (T_K/E_F)^{1/2}.
description: LaTeX file, 5 pages, 4 Postscript figures
Ensuring sustainable agricultural development in Kazakhstan: Sources of funding
Creators: name: Yessimkhan, Guldana
name: Sartanova, Nalima
Publisher: name: International Journal on Food System Dynamics
Year: 2024
Subjects: Agro-industrial complex; investment; food security; crop production; livestock; enterprise fixed capital; environmental problems

description: Agriculture of the Republic of Kazakhstan has great potential, still, it is characterized by several problems. The aspects of normative-legal regulation of the agro-industrial complex of the Republic of Kazakhstan concerning financial relations in the sphere were summarized. The main statistical indicators of the agriculture, forestry, and fisheries sectors of the state were analyzed. The analysis of the structure of investments in the enterprises of agriculture, forestry, and fisheries of the Republic of Kazakhstan was carried out. The main issues concerning the financing of agriculture of the state are defined and the directions of their solution are offered.
description: International Journal on Food System Dynamics, Vol 15, No 3 (2024): Country Issue: Kazakhstan
Disturbing the Black Hole
Creators: name: Bekenstein, Jacob D.
Publisher: name: arXiv
Year: 1998
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: I describe some examples in support of the conjecture that the horizon area of a near equilibrium black hole is an adiabatic invariant. These include a Schwarzschild black hole perturbed by quasistatic scalar fields (which may be minimally or nonminimally coupled to curvature), a Kerr black under the influence of scalar radiation at the superradiance treshold, and a Reissner--Nordström black hole absorbing a charge marginally. These clarify somewhat the conditions under which the conjecture would be true. The desired ``adiabatic theorem'' provides an important motivation for a scheme for black hole quantization.
description: 15 pages, LaTeX with crckapb style, to appear in ``The Black Hole Trail'', eds. B. Bhawal and B. Iyer (Kluwer, Dordrecht 1998)
Robust Comparative Statics for the Elasticity of Intertemporal Substitution
Creators: name: Flynn, Joel P.
name: Schmidt, Lawrence D. W.
name: Toda, Alexis Akira
Publisher: name: arXiv
Year: 2022
Subjects: subject: Theoretical Economics (econ.TH)
subject: FOS: Economics and business

description: We study a general class of consumption-savings problems with recursive preferences. We characterize the sign of the consumption response to arbitrary shocks in terms of the product of two sufficient statistics: the elasticity of intertemporal substitution between contemporaneous consumption and continuation utility (EIS), and the relative elasticity of the marginal value of wealth (REMV). Under homotheticity, the REMV always equals one, so the propensity of the agent to save or dis-save is always signed by the relationship of the EIS with unity. We apply our results to derive comparative statics in classical problems of portfolio allocation, consumption-savings with income risk, and entrepreneurial investment. Our results suggest empirical identification strategies for both the value of the EIS and its relationship with unity.
HST color-magnitude diagrams of 74 galactic globular clusters in the HST F439W and F555W bands
Creators: name: Piotto, G.
name: King, I. R.
name: Djorgovski, S. G.
name: Sosin, C.
name: Zoccali, M.
name: Saviane, I.
name: De Angeli, F.
name: Riello, M.
name: Recio-Blanco, A.
name: Rich, R. M.
name: Meylan, G.
name: Renzini, A.
Publisher: name: arXiv
Year: 2002
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present the complete photometric database and the color-magnitude diagrams for 74 Galactic globular clusters observed with the HST/WFPC2 camera in the F439W and F555W bands. A detailed discussion of the various reduction steps is also presented, and of the procedures to transform instrumental magnitudes into both the HST F439W and F555W flight system and the standard Johnson B and V systems. We also describe the artificial star experiments which have been performed to derive the star count completeness in all the relevant branches of the color magnitude diagram. The entire photometric database and the completeness function will be made available on the Web immediately after the publication of the present paper.
description: 21 pages, 77 figures. High resolution version of this paper can be retrived at http://dipastro.pd.astro.it/globulars
Artificiality of multifractal phase transitions
Creators: name: Wolf, Martin
name: Schmiegel, Jürgen
name: Greiner, Martin
Publisher: name: arXiv
Year: 1999
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: A multifractal phase transition is associated to a nonanalyticity in the generalised dimensions. We show that its occurrence is an artifact of the asymptotic scaling behaviour of integral moments and that it is not observed in an analysis based on differential n-point correlation densities.
description: 8 Pages, including 2 figures
Wool Warehouses and Their Operation in Central and Eastern States
Creators: name: Holland, R. L.
name: Gabbard, L. P.
name: Jones, A. D.
name: Holland, R. L.
name: Gabbard, L. P.
name: Jones, A. D.
Publisher: name: Unknown
Year: 1960
Subjects: subject: Livestock Production/Industries
subject: Marketing
subject: FOS: Economics and business

description: Excerpts from the report Summary: Greatly increased competition from well prepared imported wool and from manmade fibers confronts domestic wool. Improvements in the adequacy and efficiency of the market services for this wool appear to be a promising means of strengthening its competitive position. Assembling wool in merchantable quantities, preparing it for marketing, and related services of warehouse operators constitute an important segment of the wool marketing problem. The main purposes of this report are to show the nature and extent of services of warehouse operators, the facilities and equipment used, and methods of operation. This information is needed as a basis for more detailed engineering and cost studies to improve the adequacy and efficiency of the operations of wool warehouses.
Force in Kappa-Deformed Relativistic Dynamics
Creators: name: Czerhoniak, P.
Publisher: name: arXiv
Year: 2000
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Quantum Algebra (math.QA)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: We consider the physical implications of various choices of the three-momentum basis in the kappa-deformed Poincare algebra. In particular, we find that the energy dependence of the velocity of a kappa-particle leads to unexpected features in kappa-deformed kinematics. We also discuss the notion of kappa-deformed dynamics, and as a tool example we investigate the motion of a kappa-deformed particle under the action of a constant force.
description: LaTeX, 9 pages
Regulating tech-sex and managing image-based sexual abuse: an Australian perspective
Creators: name: Farrell, Anne-Maree
name: Shackleton, Nicole
name: Agnew, Elizabeth
name: Hopkins, Samantha
name: Power, Jennifer
Publisher: name: La Trobe
Year: 2025
Subjects: classificationCode: 4804
subject: Law in context
classificationCode: 4806
subject: Private law and civil obligations
classificationCode: 48
subject: Law and legal studies
classificationCode: 4802
subject: Environmental and resources law

description: A range of technologies now exist to facilitate sexual desire, pleasure and intimacy. Colloquially known as tech-sex, the growth in the use of such technologies has created a range of new opportunities for sexual expression and connection. Alongside these benefits are harms arising out of their non-consensual use. Drawing on a case study examining management of image-based sexual abuse as part of Australia’s recently reformed online safety laws, we argue for a regulatory approach that is both facilitative in showing due respect for adult sexual agency and protective in mitigating harm caused to affected individuals. Operating along a facilitative-protective regulatory axis, such an approach offers the potential to be suitably responsive to both the opportunities and challenges faced by adult individuals who engage with such technologies.
String Dilaton Fluid Cosmology
Creators: name: Capozziello, S.
name: Lambiase, G.
name: Capaldo, R.
Publisher: name: arXiv
Year: 1998
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We investigate $(n+1)$-dimensional string-dilaton cosmology with effective dilaton potential in presence of perfect-fluid matter.We get exact solutions parametrized by the constant $\gam$ of the state equation $p=(\gam-1)ρ$, the spatial dimension number $n$, the bulk of matter, and the spatial curvature constant $k$. Several interesting cosmological behaviours are selected. Finally we discuss the recovering of ordinary Einstein gravity starting from string dominated regime and a sort of asymptotic freedom due to string effective coupling.
description: 16 pages, Latex, submitted to Int. Jou. Mod. Phys. D
Positive First-order Logic on Words and Graphs
Creators: name: Kuperberg, Denis
Publisher: name: arXiv
Year: 2022
Subjects: subject: Formal Languages and Automata Theory (cs.FL)
subject: Logic in Computer Science (cs.LO)
subject: Logic (math.LO)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics

description: We study FO+, a fragment of first-order logic on finite words, where monadic predicates can only appear positively. We show that there is an FO-definable language that is monotone in monadic predicates but not definable in FO+. This provides a simple proof that Lyndon's preservation theorem fails on finite structures. We lift this example language to finite graphs, thereby providing a new result of independent interest for FO-definable graph classes: negation might be needed even when the class is closed under addition of edges. We finally show that the problem of whether a given regular language of finite words is definable in FO+ is undecidable.
description: arXiv admin note: substantial text overlap with arXiv:2101.01968
Afropsyche nigripennis Dierl 1972
Creators: name: Mbata, Keith J.
name: Prins, Jurate De
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Lepidoptera
Psychidae
Afropsyche
Afropsyche nigripennis

description: Afropsyche nigripennis Dierl, 1972
COMMON NAME(S): Bagworm moth, Bagworm or Bagmoth.
SYNONYM(S): None.
IUCN STATUS: Not Evaluated (NE).
DISTRIBUTION: Democratic Republic of Congo, Zambia.
LOCALITY IN ZAMBIA: Type locality is Zambesi [now Zambezi] Rapids on Zambesi [now Zambezi] River, in Ikelenge district, north of Mwinilunga, Northwestern Province.
LARVAL HOSTPLANT(S): Unknown.
SOURCES: De Prins & De Prins 2022; Dierl 1972.
Genus Bourgognea Dierl, 1972
description: Published as part of Mbata, Keith J. & Prins, Jurate De, 2023, Annotated checklist of moths of Zambia (Insecta: Lepidoptera), pp. 1-503 in Zootaxa 5354 (1) on page 21, DOI: 10.11646/zootaxa.5354.1.1, http://zenodo.org/record/10130434
AI/ML to identify and stratify non-clinical factors contributing to cancer health disparity in rural Appalachia
Creators: name: Montgomery, Aisha
name: Vadapalli, Ravi
name: Praduman  Jain
Publisher: name: F1000 Research Limited
Year: 2024

description: Introduction: In the medically underserved area of rural Appalachia, cancer mortality rates are 32% higher than the US average. Social determinants of health (SDOH) are known barriers to cancer care in rural regions, however, their importance is not well demonstrated in AI/ML.

Background: Our pilot study used cancer registry data to build an ML model to predict 5-year colorectal cancer (CRC) survival in Appalachians. Analyses showed that the model was less accurate in predicting survival in Appalachian vs. non-Appalachian patients. Limited data from underserved populations in public datasets may increase biases and using only clinical factors may decrease predictability of AI/ML methods. These findings led to the current project.

Methods: We hypothesized that SDOH factors were important to cancer survival in Appalachia and that SDOH data features would improve ML model performance. A combined EHR dataset from community-based cancer centers in Appalachia included clinical and SDOH data features. SDOH features were stratified and added to the ML model to evaluate their effect.

Results: Patients were average age 67±13.2 years, 49% female, and 66% rural. Stratification identified marital, employment, and insurance statuses as SDOH features with the highest impact on model output. Combining clinical and SDOH features in the ML model increased the area under the receiver operating curve (0.791) as compared to using clinical (0.758) or SDOH (0.662) features alone.

Discussion: These findings demonstrate the importance of SDOH factors on health outcomes in an underserved population. Further, the data methods highlight the need for diverse, community-based EHR datasets in AI/ML research. We built an ML model that can be used to improve cancer-related health disparities within rural and other medically underserved populations. Expansion of the current work will contribute to best practices in creating diverse, representative clinical and SDOH datasets to improve AI/ML-based outcomes.
Quantitative bounds for large deviations of heavy tailed random variables
Creators: name: Vogel, Quirin
Publisher: name: arXiv
Year: 2022
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics
subject: 60F10 (Primary), 60B10 (Secondary)

description: The probability that the sum of independent, centered, identically distributed, heavy-tailed random variables achieves a very large value is asymptotically equal to the probability that there exists a single summand equalling that value. We quantify the error in this approximation. We furthermore characterise of the law of the individual summands, conditioned on the sum being large.
description: 15 pages, fixed typos and extended to all alpha
A new discrete theory of pseudoconvexity
Creators: name: Keszegh, Balázs
Publisher: name: arXiv
Year: 2022
Subjects: subject: Combinatorics (math.CO)
subject: Computational Geometry (cs.CG)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences

description: Recently geometric hypergraphs that can be defined by intersections of pseudohalfplanes with a finite point set were defined in a purely combinatorial way. This led to extensions of earlier results about points and halfplanes to pseudohalfplanes, including polychromatic colorings and discrete Helly-type theorems about pseudohalfplanes.
 Here we continue this line of research and introduce the notion of convex sets of such pseudohalfplane hypergraphs. In this context we prove several results corresponding to classical results about convexity, namely Helly's Theorem, Carathéodory's Theorem, Kirchberger's Theorem, Separation Theorem, Radon's Theorem and the Cup-Cap Theorem. These results imply the respective results about pseudoconvex sets in the plane defined using pseudohalfplanes.
 It turns out that most of our results can be also proved using oriented matroids and topological affine planes (TAPs) but our approach is different from both of them. Compared to oriented matroids, our theory is based on a linear ordering of the vertex set which makes our definitions and proofs quite different and perhaps more elementary. Compared to TAPs, which are continuous objects, our proofs are purely combinatorial and again quite different in flavor. Altogether, we believe that our new approach can further our understanding of these fundamental convexity results.
title: Braunschweigische Anzeigen 86. Jahr 1830
Creators: name: :None
Publisher: name: Herzogliche Waisenhaus-Buchdruckerei
Year: 1830
Subjects: subject: Brunsvicensien der Universitätsbibliothek Braunschweig
subject: Braunschweigische Anzeigen
subject: 902

description: Braunschweigische Anzeigen: offizielles Regierungs- und Anzeigeblatt, vol. 86
Cosmological dark matter annihilations into gamma-rays - a closer look
Creators: name: Ullio, Piero
name: Bergstrom, Lars
name: Edsjo, Joakim
name: Lacey, Cedric
Publisher: name: arXiv
Year: 2002
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We investigate the prospects of detecting weakly interacting massive particle (WIMP) dark matter by measuring the contribution to the extragalactic gamma-ray radiation induced, in any dark matter halo and at all redshifts, by WIMP pair annihilations into high-energy photons. We perform a detailed analysis of the distinctive spectral features of this signal, recently proposed in a short letter by three of the authors, with emphasis on the signature due to monochromatic gamma-ray yields: the combined effect of cosmological redshift and absorption along the line of sight produces sharp bumps, peaked at the rest frame energy of the lines and asymmetrically smeared to lower energies. The level of the flux depends both on the particle physics scenario for WIMP dark matter and on the question of how dark matter clusters. Uncertainties introduced by the latter are thoroughly discussed implementing a realistic model inspired by results of the state-of-the-art N-body simulations and semi-analytic modeling in the cold dark matter structure formation theory. We also address the question of the potential gamma-ray background originating from blazars, presenting a novel calculation. Comparing the signal with the background, we find that there are viable configurations, in the combined parameter space defined by the particle physics setup and the structure formation scenario, for which the WIMP induced extragalactic gamma-ray signal will be detectable in the new generation of gamma-ray telescopes such as GLAST.
description: 27 pages, 15 figures
On Convergence of Binary Trust-Region Steepest Descent
Creators: name: Manns, Paul
name: Hahn, Mirko
name: Kirches, Christian
name: Leyffer, Sven
name: Sager, Sebastian
Publisher: name: arXiv
Year: 2022
Subjects: subject: Optimization and Control (math.OC)
subject: FOS: Mathematics
subject: 49J45, 49M05, 90C30

description: Binary trust-region steepest descent (BTR) and combinatorial integral approximation (CIA) are two recently investigated approaches for the solution of optimization problems with distributed binary-/discrete-valued variables (control functions). We show improved convergence results for BTR by imposing a compactness assumption that is similar to the convergence theory of CIA. As a corollary we conclude that BTR also constitutes a descent algorithm on the continuous relaxation and its iterates converge weakly-$^*$ to stationary points of the latter. We provide computational results that validate our findings. In addition, we observe a regularizing effect of BTR, which we explore by means of a hybridization of CIA and BTR.
Afforestation of savannah using cocoa agroforestry: :impacts on ecosystem services and effects of associated tree species on soil fertility
Creators: name: Harmand, J-M.
name: Nijmeijer, A.
name: Sauvadet, M.
name: Enock, S.
name: Essobo, J-D.
name: Fonkeng, E.E.
name: Jagoret, P.
name: Lauri, P-E.
name: Saj, S.
Publisher: name: Zenodo
Year: 2023

description: Past studies showed a gradual expansion of forest over savannah in forest-savannah transition zones in Central Africa. While the natural encroachment of savannah by forest is more and more impeded by human activities, farmers in Cameroon have proven that afforestation of savannah is achievable using cocoa and specific technics to build up an associated tree canopy. Furthermore, mature cocoa agroforestry systems created on savannah (S-cAFS) or in forest (F-cAFS) exhibit comparable multi-strata structures. By combining measurements of cocoa yield, litterfall, soil quality, carbon storage and tree species diversity along an age gradient (1 to 70 years), we showed that those variables in S- and F-cAFS tended to comparable levels after several decades. Results also emphasized the ability of S-cAFS to increase most of the ecosystem services (including soil fertility and plant diversity) although the time needed to reach levels found in F-cAFS varied strongly amongst variables.
In addition to the previous study, we compared in a second time the impacts of the presence of shade trees on soil functions and cocoa yield in cocoa farms set up after savannah. To do so, we sampled 5 cocoa monocultures and 8 cAFS. Cocoa yield did not vary between these systems. Nonetheless, the soil P availability was improved in cAFS compared to monocultures. Within cAFS, unshaded cocoa conditions showed the lowest soil functions associated with the low leaf litter quality of cocoa plants. Tree species had contrasting effects on soil functions. Cocoa association with the fruit trees Canarium schweinfurthii and Dacryodes edulis did not improve soil fertility compared with unshaded cocoa, while associations with the legume tree Albizia adianthifolia, or the timber trees Milicia excelsa and Ceiba pentandra significantly improved soil N and P availability. These differences could be explained by the quality of the recycled litter, since low litter recalcitrance was strongly associated with increases in soil N and P availability, while soil pH and soil C contents increased with litter Ca restitution from C. pentandra.
Our results highlighted the positive impacts of cAFS establishment in savannah on soil fertility, species diversity and carbon storage in biomass and soil over time. Furthermore, we showed that using specific trees for soil quality and compatible with cocoa, and other trees for the provision of goods, can ensure cocoa AFS multifunctionality and sustainability. Future research will need to understand how plant diversity in these cocoa systems, can help to adapt to climate change.
Keywords: Cocoa agroforestry; ecosystem services; forest-savannah transition, litter traits, soil fertility
Supplementary Information from Evidence for convergent evolution of ultrasonic hearing in toothed whales (Cetacea: Odontoceti)
Creators: name: Racicot, Rachel A.
name: Boessenecker, Robert W.
name: Darroch, Simon A. F.
name: Geisler, Jonathan H.
Publisher: name: The Royal Society
Year: 2019
Subjects: subject: Evolutionary Biology
subject: FOS: Biological sciences
subject: 40308 Palaeontology (incl. Palynology)
subject: FOS: Earth and related environmental sciences
subject: 60301 Animal Systematics and Taxonomy
subject: 60310 Plant Systematics and Taxonomy

description: Additional text, detailed description of CCNHM-1000 skull, data, methods, and figures complementing the main manuscript. Information organized in order of appearance in the main manuscript (i.e., S1, S2, etc.).
Gelfand residuated lattices
Creators: name: Rasouli, Saeed
name: Dehghani, Amin
Publisher: name: arXiv
Year: 2022
Subjects: subject: Logic (math.LO)
subject: FOS: Mathematics

description: In this paper, a combination of algebraic and topological methods is applied to obtain new and structural results on Gelfand residuated lattices. It is demonstrated that Gelfand's residuated lattices strongly tied up with the hull-kernel topology. Especially, it is shown that a residuated lattice is Gelfand if and only if its prime spectrum, equipped with the hull-kernel topology, is normal. The class of soft residuated lattices is introduced, and it is shown that a residuated lattice is soft if and only if it is Gelfand and semisimple. Gelfand residuated lattices are characterized using the pure part of filters. The relation between pure filters and radicals in a Gelfand residuated lattice is described. It is shown that a residuated lattice is Gelfand if and only if its pure spectrum is homeomorphic to its usual maximal spectrum. The pure filters of a Gelfand residuated lattice are characterized. Finally, it is proved that a residuated lattice is Gelfand if and only if the hull-kernel and the $\mathscr{D}$-topology coincide on the set of maximal filters.
description: 30 page, 2 figures, original
Bounds on the Twin-Width of Product Graphs
Creators: name: Pettersson, William
name: Sylvester, John
Publisher: name: arXiv
Year: 2022
Subjects: subject: Combinatorics (math.CO)
subject: Discrete Mathematics (cs.DM)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences
subject: G.2.2
subject: 05C99, 68R10

description: Twin-width is a graph width parameter recently introduced by Bonnet, Kim, Thomassé & Watrigant. Given two graphs $G$ and $H$ and a graph product $\star$, we address the question: is the twin-width of $G\star H$ bounded by a function of the twin-widths of $G$ and $H$ and their maximum degrees? It is known that a bound of this type holds for strong products (Bonnet, Geniet, Kim, Thomassé & Watrigant; SODA 2021). We show that bounds of the same form hold for Cartesian, tensor/direct, corona, rooted, replacement, and zig-zag products. For the lexicographical product it is known that the twin-width of the product of two graphs is exactly the maximum of the twin-widths of the individual graphs (Bonnet, Kim, Reinald, Thomassé & Watrigant; IPEC 2021). In contrast, for the modular product we show that no bound can hold. In addition, we provide examples showing many of our bounds are tight, and give improved bounds for certain classes of graphs.
description: 24 pages, 1 table, 1 figure
Testing a New Model of Embedded Protostellar Disks Against Observation: The Majority of Orion Class 0/I Disks Are Likely Warm, Massive, and Gravitationally Unstable
Creators: name: Xu, Wenrui
Publisher: name: arXiv
Year: 2022
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We formulate a parametrized model of embedded protostellar disks and test its ability to estimate disk properties by fitting dust-continuum observations. The main physical assumptions of our model are motivated by a recent theoretical study of protostellar disk formation; these assumptions include that the disk should be marginally gravitationally unstable, and that the dominant dust heating mechanism is internal accretion heating instead of external protostellar irradiation. These assumptions allow our model to reliably estimate the disk mass even when the observed emission is optically thick and to self-consistently determine disk (dust) temperature. Using our model to fit multi-wavelength observations of 156 disks in the VANDAM Orion survey, we find that the majority (57%) of this sample can be fit well by our model. Using our model, we produce new estimates of Orion protostellar disk properties. We find that these disks are generally warm and massive, with a typical star-to-disk mass ratio $M_{\rm d}/M_\star = \mathcal O(1)$ in Class 0/I. We also discuss why our estimates differ from those in previous studies and the implications of our results on disk evolution and fragmentation.
description: 23 pages, 18 figures, 4 tables. Accepted for publication in ApJ
Chromatic roots are dense in the whole complex plane
Creators: name: Sokal, Alan D.
Publisher: name: arXiv
Year: 2000
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Mathematical Physics (math-ph)
subject: Combinatorics (math.CO)
subject: Complex Variables (math.CV)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: I show that the zeros of the chromatic polynomials P_G(q) for the generalized theta graphs Θ^{(s,p)} are, taken together, dense in the whole complex plane with the possible exception of the disc |q-1| < 1. The same holds for their dichromatic polynomials (alias Tutte polynomials, alias Potts-model partition functions) Z_G(q,v) outside the disc |q+v| < |v|. An immediate corollary is that the chromatic zeros of not-necessarily-planar graphs are dense in the whole complex plane. The main technical tool in the proof of these results is the Beraha-Kahane-Weiss theorem on the limit sets of zeros for certain sequences of analytic functions, for which I give a new and simpler proof.
description: LaTeX2e, 53 pages. Version 2 includes a new Appendix B. Version 3 adds a new Theorem 1.4 and a new Section 5, and makes several small improvements. To appear in Combinatorics, Probability & Computing
Lowerbounds for Bisimulation by Partition Refinement
Creators: name: Groote, Jan Friso
name: Martens, Jan
name: de Vink, Erik. P.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Logic in Computer Science (cs.LO)
subject: FOS: Computer and information sciences

description: We provide time lower bounds for sequential and parallel algorithms deciding bisimulation on labeled transition systems that use partition refinement. For sequential algorithms this is $Ω((m \mkern1mu {+} \mkern1mu n ) \mkern-1mu \log \mkern-1mu n)$ and for parallel algorithms this is $Ω(n)$, where $n$ is the number of states and $m$ is the number of transitions. The lowerbounds are obtained by analysing families of deterministic transition systems, ultimately with two actions in the sequential case, and one action for parallel algorithms. For deterministic transition systems with one action, bisimilarity can be decided sequentially with fundamentally different techniques than partition refinement. In particular, Paige, Tarjan, and Bonic give a linear algorithm for this specific situation. We show, exploiting the concept of an oracle, that this approach is not of help to develop a faster generic algorithm for deciding bisimilarity. For parallel algorithms there is a similar situation where these techniques may be applied, too.
title: Introduction of an in-mould infrared heating device for processing thermoplastic fibre-reinforced preforms and manufacturing hybrid components
Creators: name: Beuscher, Jan
name: Schnurr, Raphael
name: Müller, Anke
name: Kühn, Markus
name: Dröder, Klaus
Publisher: name: Universitätsbibliothek Braunschweig
Year: 2017
Subjects: subject: hybrid components
subject: temperature management in thermoplastic production
subject: injection moulding
subject: infrared radiator
subject: in-mould heating
subject: 620

description: Automated production technologies of hybrid structures and components are one key requirement to force the way of lightweight constructions and design into automotive large-scale production. Furthermore, lightweight constructions need to provide additional functionality compared to conventional components to compensate for higher material and manufacturing costs. Therefore, the aim of today’s research is to find economic strategies for automated, function and process integrated final-shape-manufacturing processes.
Conventional manufacturing processes for large-scale production are applied in sheet-metal working and plastics processing industries. For this reason, industry and science try to apply the process expertise of these industries on processing fibre-reinforced plastics (FRP). The combination of thermoforming of thermoplastic fibre-reinforced preforms (TP-FRP) with metal sheet inserts and efficient injection moulding processes shows a high industrial potential and at the same time the complexity of transferring the expertise of conventional to composite materials.
The complexity occurs because of the differing material properties during the course of the process. The main challenge is the dynamic heat management of the TP-FRP during different process steps. For one thing, the preform must be molten and heated above melting point to perform a shaping process, an adhesive bonding with the injected material and the final consolidation. Conversely, a solidified preform has advantages in material handling and is less sensitive towards outside influences. Existing strategies of heating preforms during the process have several disadvantages. Either the preform must be overheated harmfully to balance the temperature losses or the process becomes inefficient because of the high thermal mass of the mould.
Therefore, this paper introduces an integrative approach to apply an infrared (IR) heating device in a mould for processing TP-FRP with gentle and effective heating.
Electronic Supplementary Figure S1 from Extension of the minimal functional unit of the RNA polymerase II CTD from yeast to mammalian cells
Creators: name: Shah, Nilay
name: Tim-Michael Decker
name: Eick, Dirk
Publisher: name: The Royal Society
Year: 2019
Subjects: subject: Molecular Biology
subject: Evolutionary Biology
subject: FOS: Biological sciences

description: Analysis of CTD mutants with two AP-spacers
Gravitational-wave sources from mergers of binary black-holes catalyzed by fly-bys interactions in the field
Creators: name: Michaely, Erez
name: Perets, Hagai B.
Publisher: name: arXiv
Year: 2019
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Several scenarios were suggested for the origins of gravitational-wave (GW) sources from mergers of stellar binary black holes (BBHs). Here we propose a novel origin through catalyzed formation of GW-sources from ultra-wide binaries in the field. Such binaries experience perturbations from random stellar fly-bys which excite their eccentricities. Once a wide-binary is driven to a sufficiently small peri-center approach, GW-emission becomes significant, and the binary inspirals and merges. We derive an analytic model and verify it with numerical calculation to compute the merger rate to be $\sim10{\rm \times f_{wide}\,{\rm Gpc}^{-3}yr^{-1}}$ ($f_{\rm wide}$ is the fraction of wide BH-binaries), which is comparable to the observationally inferred rate. The observational signatures from this channel include spin-orbit misalignment; preference for high mass-ratio BBH; preference for high velocity-dispersion host-galaxies; and a uniform delay-time distribution.
description: Comments are welcomed
Spectral properties of Atoms in Fields: A Semiclassical Analysis
Creators: name: Walker, P. N.
name: Monteiro, T. S.
Publisher: name: arXiv
Year: 1999
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: We develop a semiclassical theory for the spectral rigidity of non-hydrogenic Rydberg atoms in electric fields and evaluate the significant deviations from the well-known Poissonian behaviour in the hydrogenic case. The resulting formula is shown to be in excellent agreement with the exact quantal result. We also investigate diamagnetic atoms; we find that, in contrast to the classically integrable atoms, diffraction has a small effect on the spectral rigidity in the classically chaotic atom. We show our predictions can also be of use in the mixed phase space regime.
description: 4 pages, 3 figures
HyperATL*: A Logic for Hyperproperties in Multi-Agent Systems
Creators: name: Beutner, Raven
name: Finkbeiner, Bernd
Publisher: name: arXiv
Year: 2022
Subjects: subject: Logic in Computer Science (cs.LO)
subject: FOS: Computer and information sciences

description: Hyperproperties are system properties that relate multiple computation paths in a system and are commonly used to, e.g., define information-flow policies. In this paper, we study a novel class of hyperproperties that allow reasoning about strategic abilities in multi-agent systems. We introduce HyperATL*, an extension of computation tree logic with path variables and strategy quantifiers. Our logic supports quantification over paths in a system - as is possible in hyperlogics such as HyperCTL* - but resolves the paths based on the strategic choices of a coalition of agents. This allows us to capture many previously studied (strategic) security notions in a unifying hyperlogic. Moreover, we show that HyperATL* is particularly useful for specifying asynchronous hyperproperties, i.e., hyperproperties where the execution speed on the different computation paths depends on the choices of a scheduler. We show that finite-state model checking of HyperATL* is decidable and present a model checking algorithm based on alternating automata. We establish that our algorithm is asymptotically optimal by proving matching lower bounds. We have implemented a prototype model checker for a fragment of HyperATL* that can check various security properties in small finite-state systems.
An Auckland Land Value Annual Database
Creators: name: Grimes, Arthur
name: Liang, Yun
name: Grimes, Arthur
name: Liang, Yun
Publisher: name: Unknown
Year: 2007
Subjects: subject: Land Economics/Use
subject: Auckland
subject: Land values
subject: database

description: We construct an annual land value database at the meshblock (MB) level for the Greater Auckland region. The database provides a resource for research work that requires land values (per hectare) across the region. The data is based on valuation records sourced from Quotable Value New Zealand (QVNZ). It covers seven Territorial Authorities (TAs): Rodney District, North Shore City, Waitakere City, Auckland City, Manukau City, Papakura District and Franklin District. The valuation data, which are generally available on a three-yearly cycle for each TA, are interpolated to annual frequency using sale price data for residential vacant land at the TA level. The resulting database extends from 1990- 2003 (annually) for MBs in all seven TAs. In some TAs, data are available for slightly longer periods depending on source data availability.
A Nivat Theorem for Weighted Alternating Automata over Commutative Semirings
Creators: name: Grabolle, Gustav
Publisher: name: arXiv
Year: 2022
Subjects: subject: Logic in Computer Science (cs.LO)
subject: Formal Languages and Automata Theory (cs.FL)
subject: FOS: Computer and information sciences
subject: F.4.1; F.4.3; F.1.1

description: This paper connects the classes of weighted alternating finite automata (WAFA), weighted finite tree automata (WFTA), and polynomial automata (PA).
 First, we investigate the use of trees in the run semantics for weighted alternating automata and prove that the behavior of a weighted alternating automaton can be characterized as the composition of the behavior of a weighted finite tree automaton and a specific tree homomorphism, if weights are taken from a commutative semiring.
 Based on this, we give a Nivat-like characterization for weighted alternating automata. Moreover, we show that the class of series recognized by weighted alternating automata is closed under inverses of homomorphisms, but not under homomorphisms. Additionally, we give a logical characterization of weighted alternating automata, which uses weighted MSO logic for trees. Finally, we investigate the strong connection between weighted alternating automata and polynomial automata. We prove: A weighted language is recognized by a weighted alternating automaton iff its reversal in recognized by a polynomial automaton. Using the corresponding result for polynomial automata, we are able to prove that the ZERONESS problem for weighted alternating automata with weights taken from the rational numbers decidable.
description: Extended version of a paper at GandALF 2021, see arXiv:2109.08323. Submitted to GandALF 2021 Special Issue on LMCS First revision: Typos & grammar, slight changes in structure, additional explanations, new lmcs.cls
Optimization of Moringa Seed Powder as a Disinfectant for Reducing E. Coli in Water at Kalurahan Kelor, Kapanewon Karangmojo, Gunungkidul
Creators: name: Sugiarto, Bambang
name: Nyamiati, Retno Dwi
name: Kusuma, Heri Septya
name: Maryana, Maryana
Publisher: name: Zenodo
Year: 2024

description: This material has been presented on 3rd International Conference on Advanced Research in Engineering and Technology 2024 October 23 - 24, 2024.
title: QGIS - Editer des données d'une base PostgreSQL (QGIS 3)
Creators: name: Coutelier, Clément
Publisher: name: NAKALA - https://nakala.fr (Huma-Num - CNRS)
publisherIdentifier: https://ror.org/04ces3204
publisherIdentifierScheme: ROR
Year: 2025
Subjects: subject: SIG
subject: système d'information géographique
subject: QGIS
subject: PostgreSQL (système informatique)

description: Cette fiche présente une méthode pour créer une connexion avec une base PostgreSQL dans QGIS puis pour éditer des données dans une table de cette base.
Reachability In Simple Neural Networks
Creators: name: Sälzer, Marco
name: Lange, Martin
Publisher: name: arXiv
Year: 2022
Subjects: subject: Computational Complexity (cs.CC)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: We investigate the complexity of the reachability problem for (deep) neural networks: does it compute valid output given some valid input? It was recently claimed that the problem is NP-complete for general neural networks and specifications over the input/output dimension given by conjunctions of linear inequalities. We recapitulate the proof and repair some flaws in the original upper and lower bound proofs. Motivated by the general result, we show that NP-hardness already holds for restricted classes of simple specifications and neural networks. Allowing for a single hidden layer and an output dimension of one as well as neural networks with just one negative, zero and one positive weight or bias is sufficient to ensure NP-hardness. Additionally, we give a thorough discussion and outlook of possible extensions for this direction of research on neural network verification.
description: arXiv admin note: substantial text overlap with arXiv:2108.13179
Transitions between root subsets associated with Carter diagrams
Creators: name: Stekolshchik, Rafael
Publisher: name: arXiv
Year: 2022
Subjects: subject: Representation Theory (math.RT)
subject: FOS: Mathematics
subject: 20F55, 20E45, 15A18

description: For any two root subsets associated with two Carter diagrams that have the same $ADE$ type and the same size, we construct the transition matrix that maps one subset to the other. The transition between these two subsets is carried out in some canonical way affecting exactly one root, so that this root is mapped to the minimal element in some root subsystem. The constructed transitions are involutions. It is shown that all root subsets associated with the given Carter diagram are conjugate under the action of the Weyl group. A numerical relationship is observed between enhanced Dynkin diagrams $Δ(E_6)$, $Δ(E_7)$ and $Δ(E_8)$ (introduced by Dynkin-Minchenko) and Carter diagrams. This relationship echoes the $2-4-8$ assertions obtained by Ringel, Rosenfeld and Baez in completely different contexts regarding the Dynkin diagrams $E_6$, $E_7$, $E_8$.
description: 43 pages, 48 figures, 7 tables