cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Darboux transformations for a 6-point scheme
Creators: name: Nieszporski, Maciej
Publisher: name: arXiv
Year: 2006
Subjects: subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: Differential Geometry (math.DG)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: We introduce (binary) Darboux transformation for general differential equation of the second order in two independent variables. We present a discrete version of the transformation for a 6-point difference scheme. The scheme is appropriate to solving a hyperbolic type initial-boundary value problem. We discuss several reductions and specifications of the transformations as well as construction of other Darboux covariant schemes by means of existing ones. In particular we introduce a 10-point scheme which can be regarded as the discretization of self-adjoint hyperbolic equation.
Whitepaper UtopiaMaker
Creators: name: TOLOSA, Ana
name: PARMENTIER, Philippe
Publisher: name: Zenodo
Year: 2019
Subjects: Future society
Sociology of change
Innovation behaviour
Social and economic rights
Collective economy

description: The UtopiaMaker community lays the groundwork for exploring its way of doing with the objective of creating, in common, "agreements" that modify the exchange of knowledge, services and social experiences without interfering with any value system. Our subsequent purpose is to ensure that the human being is not identified as an element within a value chain but is recognized as a being capable of transforming his environment in a creative way without obtaining rewards. For this, we present the first version of our Whitepaper, which summarizes the context analyzed by the project proponents and the possible solutions or transitions to achieve the objective, while also recounting the first experiences obtained of the research-action-participation process developed in the community. Scientific and opinion postulates were taken into account in areas such as philosophy, economics, sociology, education, environment and politics. All sources consulted are left so that the interested disaggregate the document and can contribute to the construction and refinement of the proposal and the following versions of the Whitepaper.
Geometry of complex instability and escape in four-dimensional symplectic maps
Creators: name: Stöber, Jonas
name: Bäcker, Arnd
Publisher: name: arXiv
Year: 2020
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: In four-dimensional symplectic maps complex instability of periodic orbits is possible, which cannot occur in the two-dimensional case. We investigate the transition from stable to complex unstable dynamics of a fixed point under parameter variation. The change in the geometry of regular structures is visualized using 3D phase-space slices and in frequency space using the example of two coupled standard maps. The chaotic dynamics is studied using escape time plots and by computations of the 2D invariant manifolds associated with the complex unstable fixed point. Based on a normal-form description, we investigate the underlying transport mechanism by visualizing the escape paths and the long-time confinement in the surrounding of the complex unstable fixed point. We find that the escape is governed by the transport along the unstable manifold across invariant planes of the normal-form.
description: 19 pages, 17 figures
Temperature fluctuations in H II regions: t2 for the two-phase model
Creators: name: Zhang, Y.
name: Ercolano, B.
name: Liu, X. -W.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Aims: We investigate temperature fluctuations in H II regions in terms of a two-phase model, which assumes that the nebular gas consists of a hot and a cold phase. Methods: We derive general formulae for T([O III), the [O III] forbidden line temperature, and T(H I), the hydrogen Balmer jump temperature, in terms of the temperatures of the hot and cold phases, T_h and T_c. Results: For large temperature differences, the values of t2 required to account for the observed difference between T([O III]) and T(H I) are much lower than those deduced using the classical formulae that assume random and small amplitude temperature fluctuations. One should therefore be cautious when using a two-phase model to account for empirically derived $t^2$ values. We present a correction of a recent work by Giammanco & Beckman, who use a two-phase model to estimate the ionization rate of H II regions by cosmicrays. We show that a very small amount of cold gas is sufficient to account for t2 values typically inferred for H II regions.
description: 5 pages, 1 figure, accepted for publication in A&A
EL NUEVO ORDEN MUNDIAL DE LAS LENGUAS
Creators: name: Rafael del Moral Ispaniya AEPE prezidenti (2015-2023), professor, filologiya fanlari doktori
Publisher: name: Zenodo
Year: 2024

description:   El mundo de la comunicación avanza impulsado por un nuevo orden mundial de las lenguas.

Si en épocas en que las naciones vivían aisladas y los pueblos diseminados la babelización fue el camino natural de las lenguas, ahora el castigo bíblico tiende a la extinción porque la humanidad ha elegido, sin que nadie lo imponga, el camino más recto para entenderse, el ambilingüismo o uso habitual de dos lenguas.
Schroedinger equation for joint bidirectional evolution in time: astrophysical applications
Creators: name: Hahne, G. E.
Publisher: name: arXiv
Year: 2006
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The theoretical framework established in arXiv:quant-ph/0404103 is extended to deal with possible astrophysical manifestations of phenomena involving reverse, as well as forward, causation in time. The basic idea is that space-time comprises the direct sum of a number of quantized fields, including a distinct physical vacuum for each space in the sum. It is presumed that these fields all contribute to, and are influenced by, gravitation, but generally do not interact electromagnetically, i.e., are mutually invisible. At least one term in the sum is proposed to consist of matter+vacuum evolving backward in time; the expectation values of energies, both of matter and vacuum, of this subspace are by construction negative, with a corresponding change of sign in classical gravitational and inertial masses.
description: 19 pages, 3 figures; augmented from paper published in the Proceedings of the Symposium on "Frontiers of Time: Reverse Causation--Experiment and Theory" (U. of San Diego, June 18--22, 2006; publ. AIP Press, 2006)
Welsh Wreck Web Research Project (North Cardigan Bay). On-line research into the wreck of the: Reindeer
Creators: name: Perks, Graeme
Publisher: name: Archaeology Data Service
Year: 2024

description: Welsh Wreck Web Research Project unpublished report series, 1
description: The Reindeer was a wooden schooner of 75 tons built in 1841 at Nevin by Richard Davies and was registered at Pwllheli. In December 1847 Reindeer was driven ashore on Puffin Island, crew saved. Reindeer continued trading between Wales, Ireland and London with some voyages to the North East of England and both coasts of Scotland. Reindeer made some voyages to France and one to Spain in 1855/6 but this was unusual. The voyages from Wales often carried Slate but Reindeer then went where ever there was a cargo, with a number of return trips to Runcorn with clay. Reindeer often put in to avoid gales but was dis-masted in 1853. The regular voyages continued until December 1874 when she sprang a leak in the Irish sea 10 miles off Bardsey Island and sank, the crew were saved.
Οι σχέσεις που αναπτύσσονται ανάμεσα στις έννοιες του brand trust , customer engagement , brand loyalty και e-W.O.M. στον ξενοδοχειακό κλάδο στην εποχή της κοινωνικής δικτύωσης
Creators: name: Κράκας, Γεώργιος Βασιλείου
Publisher: name: Aristotle University of Thessaloniki
Year: 2014
Subjects: Δικτύωση
Ξενοδοχείο
Πελάτης
Networking
Hotel
Customer

description: O σκοπός της παρούσης εργασίας ήταν να μελετήσει σχέσεις οι οποίες αναπτύσσονται ανάμεσα στις έννοιες του brand trust , customer engagement , brand loyalty και e-W.O.M. στον ξενοδοχειακό κλάδο στην εποχή της κοινωνικής δικτύωσης .Αρχικά εξετάστηκαν οι διάφοροι όροι καθώς επίσης και το θεωρητικό υπόβαθρο το οποίο τις ενώνει .Έπειτα αναλύθηκαν οι σχέσεις που συνδέουν τους παραπάνω όρους και όλα αυτά υπό το πρίσμα της εποχής της κοινωνικής δικτύωσης .Ειδική αναφορά έγινε επίσης και στην επεξήγηση του φαινομένου της διάδοσης της ταξιδιωτικής εμπειρίας από τους καταναλωτές και στον ρόλο των social media στην διοχέτευση της πληροφορίας .Στο τελικό στάδιο ακολουθεί η μεθοδολογία έρευνας και συζήτηση επί των αποτελεσμάτων που προκύπτουν με την χρήση με την χρήση του κατάλληλου λογισμικού , καθώς και η εμπειρική επιβεβαίωση του μοντέλου που έχει προταθεί .
description: The purpose of the present thesis was to study the relations which are developed between the terms of brand trust ,customer engagement , brand loyalty and e-W.O.M. in the hospitality industry in the era of social networking .Initially the various terms were examined as well as the theoretical background which unites them .Then the relations which connect these terms were analyzed under the prism of the era of social networking .Special reference was also done for the amplification of the phenomenon of spreading the travelling experience by the customers and the role that the social media have in the channeling of the information. At the final stage follows the research methodology and the discussion over the results which accrue , by the usage of special software , as well as the empirical confirmation of the model which has been suggested .
The P-T Probability Framework for Semantic Communication, Falsification, Confirmation, and Bayesian Reasoning
Creators: name: Lu, Chenguang
Publisher: name: arXiv
Year: 2020
Subjects: subject: Other Statistics (stat.OT)
subject: FOS: Computer and information sciences
subject: E.4; I.2.0; I.2.3; I.2.6; I.5.3; H.1.1
subject: 68T27, 68T30, 60B05, 68P30, 94A17, 94A34, 30B42, 30B48, 03B50, 03B65

description: Many researchers want to unify probability and logic by defining logical probability or probabilistic logic reasonably. This paper tries to unify statistics and logic so that we can use both statistical probability and logical probability at the same time. For this purpose, this paper proposes the P-T probability framework, which is assembled with Shannon's statistical probability framework for communication, Kolmogorov's probability axioms for logical probability, and Zadeh's membership functions used as truth functions. Two kinds of probabilities are connected by an extended Bayes' theorem, with which we can convert a likelihood function and a truth function from one to another. Hence, we can train truth functions (in logic) by sampling distributions (in statistics). This probability framework was developed in the author's long-term studies on semantic information, statistical learning, and color vision. This paper first proposes the P-T probability framework and explains different probabilities in it by its applications to semantic information theory. Then, this framework and the semantic information methods are applied to statistical learning, statistical mechanics, hypothesis evaluation (including falsification), confirmation, and Bayesian reasoning. Theoretical applications illustrate the reasonability and practicability of this framework. This framework is helpful for interpretable AI. To interpret neural networks, we need further study.
description: 36 pages; 10 Figures
The age dependence of galaxy clustering
Creators: name: Reed, Darren S.
name: Governato, Fabio
name: Quinn, Thomas
name: Stadel, Joachim
name: Lake, George
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We construct mock galaxy catalogues to analyse clustering properties of a Lambda cold dark matter (LCDM) universe within a cosmological dark matter simulation of sufficient resolution to resolve structure down to the scale of dwarfs. We show that there is a strong age-clustering correlation for objects likely to host luminous galaxies, which includes the satellite halo (subhalo) population. Older mock galaxies are significantly more clustered in our catalog, which consists of satellite haloes as well as the central peaks of discrete haloes, selected solely by peak circular velocity. This age dependence is caused mainly by the age-clustering relation for discrete haloes, recently found by Gao et al., acting mostly on field members, combined with the tendency for older mock galaxies to lie within groups and clusters, where galaxy clustering is enhanced. Our results suggest that the clustering age dependence is manifested in real galaxies. At small scales (less than ~5 Mpc/h), the very simple assumption that galaxy colour depends solely on halo age is inconsistent with the strength of the observed clustering colour trends, where red galaxies become increasingly more clustered than blue galaxies toward smaller scales, suggesting that luminosity weighted galaxy ages do not closely trace the assembly epoch of their dark matter hosts. The age dependence is present but is much weaker for satellite haloes lying within groups and clusters than for the global population.
description: accepted by MNRAS, revisions include additional figures and expanded discussion
Antibacterial Properties of the Extracts from Some Zingibereous Species in Thailand against Bacteria Causing Diarrhea and Food Poisoning in Human
Creators: name: Kullanitpitch Udomthanadech
name: Srunya Vajrodaya
name: Yingyong Paisooksantivatana
Publisher: name: TUENGR GROUP
Year: 2015
Subjects: zingiberaceous plant extracts, Zingiberaceae, Ethanolic extract, Aerobic, Anaerobic

description: 5, 6, International Transaction Journal of Engineering, Management, & Applied Sciences & Technologies
CIDAR project, development of a non-intrusive capability for soot measurement in aircraft engine emissions
Creators: name: Archilla, V.
name: Aragón, G.
name: Wright, P.
name: Ozanyan, K.
name: Black, J.
name: Lengden, M.
name: Burns, I.
name: Johnstone, W.
name: Polo, V.
name: Beltrán, M.
name: Johnson, M.
Publisher: name: Zenodo
Year: 2018

description: The complexity of Very High Bypass Ratio (VHBR) lean burn combustion systems requires careful fuel control and optimised staging to minimise non-volatile Particulate Matter (nvPM) emissions. Fuel flow variation across injectors will impact the temperature distribution through the turbine and thus influences rates of nvPM formation and consumption. Through Clean Sky 2, Rolls-Royce are developing technologies required for VHBR engines. CIDAR (Combustion species Imaging Diagnostics for Aero-engine Research) supports this initiative. Extractive sampling systems are the current standard method for measuring exhaust gas and fine particle emissions from various types of aircraft engines under actual operating conditions. Emerging non-intrusive approaches to gas and particulate measurement offer alternatives to extractive methods, with some significant advantages (no impact on engine performance and no hardware installed in engine exhaust, bypass or entrained flows)
Quasi-Polynomiality of Monotone Orbifold Hurwitz Numbers and Grothendieck's Dessins d'Enfants
Creators: name: Kramer, Reinier
name: Lewa\'Nski, Danilo
name: Shadrin, Sergey
Publisher: name: Deutsche Mathematiker-Vereinigung
Year: 2019

description: We prove quasi-polynomiality for monotone and strictly monotone orbifold Hurwitz numbers. The second enumerative problem is also known as enumeration of a special kind of Grothendieck's dessins d'enfants or $r$-hypermaps. These statements answer positively two conjectures proposed by Do-Karev and Do-Manescu. We also apply the same method to the usual orbifold Hurwitz numbers and obtain a new proof of the quasi-polynomiality in this case. In the second part of the paper we show that the property of quasi-polynomiality is equivalent in all these three cases to the property that the $n$-point generating function has a natural representation on the $n$-th cartesian powers of a certain algebraic curve. These representations are necessary conditions for the Chekhov-Eynard-Orantin topological recursion.
description: DOCUMENTA MATHEMATICA, Vol 24 (2019), p. 857-898
Gravitational Anomalies, Hawking Radiation, and Spherically Symmetric Black Holes
Creators: name: Vagenas, Elias C.
name: Das, Saurya
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Astrophysics (astro-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Motivated by the recent work of Robinson and Wilczek, we evaluate the gravitational anomaly of a chiral scalar field in a Vaidya spacetime of arbitrary mass function, and thus the outgoing flux from the time-dependent horizon in that spacetime. We show that this flux differs from that of a perfect blackbody at a fixed temperature. When this flux is taken into account, general covariance in that spacetime is restored. We also generalize their results to the most general static, and spherically symmetric spacetime.
description: 13 pages, no figure, LaTeX; (v2) rephrasing of Section 1, new results in Section 2, references updated and added. To appear in JHEP
Welsh Wreck Web Research Project (North Cardigan Bay). On-line research into the wreck of the: Repeater
Creators: name: Perks, Graeme
Publisher: name: Archaeology Data Service
Year: 2024

description: Welsh Wreck Web Research Project unpublished report series, 1
description: The fully rigged ship Repeater was built in the USA in 1815, registered in Massachusetts and first sailed to Britain in 1816 after the hostilities between the two countries had ended. Repeater sailed between Baltimore and Liverpool, and then the USA and Liverpool and Europe. The Repeater's cargo's were Cotton and Tobacco. In 1821 Repeater sailed from Baltimore for Liverpool. In Norfolk, Virginia she was capsized in a storm while at anchor and after the masts had been cut away was towed into harbour. The Repeater continued her journey but when she reached the coast of Wales she was driven ashore in a severe gale near Pwllheli and wrecked. The crew and passengers were saved, along with the cargo.
Mechanical characterization of brain tissue in tension at dynamic strain rates
Creators: name: Rashid, Badar
name: Destrade, Michel
name: Gilchrist, Michael D.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: Mechanical characterization of brain tissue at high loading velocities is crucial for modeling Traumatic Brain Injury (TBI). During severe impact conditions, brain tissue experiences compression, tension and shear. Limited experimental data is available for brain tissue in extension at dynamic strain rates. In this research, a High Rate Tension Device (HRTD) was developed to obtain dynamic properties of brain tissue in extension at strain rates of < 90/s. In vitro tensile tests were performed to obtain properties of brain tissue at strain rates of 30, 60 and 90/s up to 30% strain. The brain tissue showed a stiffer response with increasing strain rates, showing that hyperelastic models are not adequate. Specifically, the tensile engineering stress at 30% strain was 3.1 +/- 0.49 kPa, 4.3 +/- 0.86 kPa, 6.5 +/- 0.76 kPa (mean +/- SD) at strain rates of 30, 60 and 90/s, respectively. Force relaxation tests in tension were also conducted at different strain magnitudes (10-60% strain) with the average rise time of 24 ms, which were used to derive time dependent parameters. One-term Ogden, Fung and Gent models were used to obtain material parameters from the experimental data. Numerical simulations were performed using a one-term Ogden model to analyze hyperelastic behavior of brain tissue up to 30% strain. The material parameters obtained in this study will help to develop biofidelic human brain finite element models, which can subsequently be used to predict brain injuries under impact conditions and as a reconstruction and simulation tool for forensic investigations.
description: arXiv admin note: substantial text overlap with arXiv:1302.4535
A policy analysis of waste management legislation in Canada and Germany with a focus on the polluter pays principle
Creators: name: Willenbrock, Christel
Publisher: name: University of British Columbia
Year: 2009

description: My thesis critically examines the legal approach to waste management that Canada and Germany have taken over the past twenty years. Waste management offers an excellent paradigm for understanding pollution issues in general, as waste disposal, in one form or another, lies at the root of all pollution. As a highly visible environmental problem, waste has earned a great deal of attention from environmental policy and law makers. Waste management law represents a "microcosm" of environmental law, and thus offers a particularly suitable context for analysing the development of modern environmental policy. Environmental degradation is caused by the aggregated decisions of all members of society. This implies that everyone must be involved in the effort to reestablish the vital link between the eco-system and the economy. Some argue that environmental problems result from market failure and that polluters must be given an incentive to consider environmental issues as a cost factor in their decision-making. Since its development in the 1970s in the economic context, the polluter pays principle has become a basic element of environmental policy, serving as an instrument to determine who should bear responsibility for environmental protection. In my thesis, I examine how this concept has been integrated into national policies. In particular, I analyse the implementation of the principle in the context of contaminated sites remediation and of recycling, where new concepts of environmental responsibility have emerged. The polluter pays principle is a promising concept for finding a solution to certain environmental problems. If the necessary ecological reforms are to take place, however, law and policy require a moral dimension to change people's attitude towards their environment. Environmental policy cannot be left to the uncertainties of profit signals in the market place, as a strategic approach in both space and time mandates an active role for government. The aim of this thesis is to point out some of the ways in which Canadian and German environmental policy, as implemented in waste law, has tried to cope with the complex issue of environmental protection and, in particular, whether and how a new concept of individual responsibility for the environment has gained recognition.
Self-generated ultraviolet radiation in molecular shock waves I. Effects of Lyman $α$, Lyman $β$, and two-photon continuum
Creators: name: Lehmann, A.
name: Godard, B.
name: Forêts, G. Pineau des
name: Falgarone, E.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Shocks are ubiquitous in the interstellar and intergalactic media, where their chemical and radiative signatures reveal the physical conditions in which they arise. Detailed astrochemical models of shocks at all velocities are necessary to understand the physics of many environments including protostellar outflows, supernova remnants, and galactic outflows. We present an accurate treatment of the self-generated UV radiation in intermediate velocity, stationary, weakly magnetised, J-type, molecular shocks. Shock solutions computed with the Paris-Durham shock code are post-processed using a multi-level accelerated $Λ$-iteration radiative transfer algorithm to compute Ly$α$, Ly$β$, and 2-photon continuum emission. The subsequent impacts on the ionisation and dissociation of key atomic and molecular species as well as on the heating by the photoelectric effect take the wavelength dependent cross-sections and the fluid velocity profile into account. We analyse shock models with velocities $V=25-60$ km/s, propagating in dense ($n \geq 10^4$ ${\rm cm}^{-3}$), shielded gas. Self-absorption traps Ly$α$ photons in a small region in the shock, though a large fraction escapes into the line wings. We find a critical velocity $V\sim 30$ km/s above which shocks produce a Ly$α$ photon flux exceeding that of the standard ISRF. The escaping photons generate a warm slab (T~100 K) ahead of the shock as well as pre-ionise C and S. These shocks are traced by bright atomic fine structure (e.g. O and S) and metastable (e.g. O and C) lines, substantive molecular emission (e.g. H2, OH, and CO), enhanced column densities of several species (e.g. CH+ and HCO+), as well as a severe destruction of H2O. As much as 13-21% of the initial kinetic energy of the shock escapes in Ly$α$ and Ly$β$ photons if the dust opacity in the radiative precursor allows it.
description: Accepted for publication in A&A, 16 main body pages, 8 appendices pages
Effect of edge transmission and elastic scattering on the resistance of magnetic barriers
Creators: name: Cerchez, M.
name: Hugger, S.
name: Heinzel, T.
name: Schulz, N.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Strong magnetic barriers are defined in two-dimensional electron gases by magnetizing dysprosium ferromagnetic platelets on top of a Ga[Al]As heterostructure. A small resistance across the barrier is observed even deep inside the closed regime. We have used semiclassical simulations to explain this behavior quantitatively in terms of a combined effect of elastic electron scattering inside the barrier region and E x B drift at the intersection of the magnetic barrier with the edge of the Hall bar.
description: 7 pages 4 figures
Welsh Wreck Web Research Project (North Cardigan Bay). On-line research into the wreck of the: Richard & Henry
Creators: name: Perks, Graeme
Publisher: name: Archaeology Data Service
Year: 2024

description: Welsh Wreck Web Research Project unpublished report series, 1
description: The Richard and Henry was a sloop with a smack rig, of 26 tons, built at Carnarvon in 1846 or 1856 probably by Richard Edwards. The Richard and Henry was employed mainly in voyages within Wales between ports exporting Slates, copper ore and coal. The Richard and Henry was driven ashore near Llanddwyn in July 1856 being recovered by the pilots and lifeboat from Caernarfon. The Richard and Henry lost two anchors at St Tudwall' Roads in 1865 and after being moored at Pwllheli was swept out to sea in a storm and lost. One half of the Richard and Henry was washed ashore near Harlech.
Standard and epsilon-finite Master Integrals for the rho-Parameter
Creators: name: Faisst, M.
name: Maierhoefer, P.
name: Sturm, C.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We have constructed an epsilon-finite basis of master integrals for all new types of one-scale tadpoles which appear in the calculation of the four-loop QCD corrections to the electroweak rho-parameter. Using transformation rules from the epsilon-finite basis to the standard minimal-number-of-lines basis, we obtain as a by-product analytical expressions for few leading terms of the epsilon-expansion of all members of the standard basis. The new master integrals have been computed with the help of the Pade method and by use of difference equations independently.
description: 26 pages
A-infinity-bimodules and Serre A-infinity-functors
Creators: name: Lyubashenko, Volodymyr
name: Manzyuk, Oleksandr
Publisher: name: arXiv
Year: 2007
Subjects: subject: Category Theory (math.CT)
subject: FOS: Mathematics

description: We define A-infinity-bimodules similarly to Tradler and show that this notion is equivalent to an A-infinity-functor with two arguments which takes values in the differential graded category of complexes of k-modules, where k is a ground commutative ring. Serre A-infinity-functors are defined via A-infinity-bimodules likewise Kontsevich and Soibelman. We prove that a unital closed under shifts A-infinity-category A over a field k admits a Serre A-infinity-functor if and only if its homotopy category H^0(A) admits a Serre k-linear functor. The proof uses categories enriched in K, the homotopy category of complexes of k-modules, and Serre K-functors. Also we use a new A-infinity-version of the Yoneda Lemma generalizing the previously obtained result.
description: 122 pages, Latex + Paul Taylor's diagrams.sty. This is the published version + complete proof of A-infinity Yoneda Lemma
Biologic interventions - Interwencje biologiczne
Creators: name: Jeleński, Józef
name: Bartłomiej Wyżga
Publisher: name: Zenodo
Year: 2016
Subjects: riparian buffers
mountain rivers
invasive species
silvopasture

description: Tekst przedstawia potrzeby interwencji w zakresie roślinności górskiej doliny rzecznej, metody usuwania obcych gatunków, sposoby ochrony mozaiki siedlisk roślinnych, zasady zadrzewiania i ich pielęgnacji oraz metody gospodarki pastwiskowej. - The text describes needs for interventions within vegetation of mountain river valley, removing alien species, regulation of species composition and maintaining mosaic vegetation including trees and pastures.
"DEVONU LUG'OTIT TURK"DA IFODALANGAN UST KIYIM NOMALARINING HOZIRGI TURKIY TILLARGA MUNOSABATI
Creators: name: Hamdulla Dadaboyev filol.f.d., professor, ToshDO'TAU
Publisher: name: Zenodo
Year: 2024

description: “Devonu lug‘otit turk” so‘z boyligida Qoraxoniylar saltanatida yashagan turkiy urug‘lar jonli so‘zlashuv nutqi hamda ilk eski turkiy adabiy tilda qo‘llanishda bo‘lgan maishiy leksikaga salmoqli o‘rin ajratilgan. Ushbu maqolada qardosh turkiy tillar maishiy leksikasining mavzuiy guruhlaridan biri ust kiyim nomlarini anglatuvchi so‘zlarning shakllanish va rivojlanish bosqichlarini belgilashda Mahmud Koshg‘ariyning ulkan mehnati tufayli yuzaga chiqqan qomusiy asarning o‘rniga diqqat qaratilgan.

Kalit so‘zlar: integral sema, eski turkiy til, affiks, kiyim turlari, xususiy ma’no, mutlaq sinonim, Turfon matnlari.
Cortical Stimulation for Cognitive Rehabilitation in Stroke Patients: Exploring Innovative Protocols and Clinical Trial Data
Creators: name: Farooq, Mustafa
name: Patel, Rahul
name: Mehra, Mehul
name: Nguyen, Khoi
Publisher: name: Continental Journal of Biological Sciences
Year: 2024

description: Abstract

Cortical stimulation techniques, such as transcranial magnetic stimulation (TMS) and transcranial direct current stimulation (tDCS), offer promising advancements in cognitive rehabilitation for stroke patients, with approximately 50% of stroke survivors developing cognitive impairments within the first year. These impairments, including deficits in memory, attention, and executive function, are a leading contributor to long-term disability. Traditional rehabilitation strategies often yield limited results, particularly in moderate to severe cases. However, clinical trials have demonstrated that TMS and tDCS can significantly enhance cognitive recovery by promoting neuroplasticity. TMS operates by reducing interhemispheric imbalance and stimulating the peri-lesional cortex, while tDCS modulates neuronal excitability through low-level electrical currents. Data show that patients receiving TMS within the first three months post-stroke experience a 15-20% greater improvement in memory retention and executive function compared to standard therapy alone. Similarly, tDCS has shown a 30% improvement in cognitive test scores, particularly in memory and attention, when applied early in recovery. Moreover, high-definition tDCS has led to a 35% improvement in memory recall and executive function. Techniques such as EEG or fMRI further enhance these outcomes by enabling personalized treatment based on individual brain architecture and lesion location, making cortical stimulation a transformative, non-invasive therapy for stroke rehabilitation.
Welsh Wreck Web Research Project (North Cardigan Bay). On-line research into the wreck of the: Robert / Tokatea
Creators: name: Perks, Graeme
Publisher: name: Archaeology Data Service
Year: 2024

description: Welsh Wreck Web Research Project unpublished report series, 1
description: The Robert was built in Medford, Massachusetts in 1848 by John Taylor and registered in Boston. The Robert was involved in voyages between the east coast of the USA and Britain, France and Spain, with voyages also between ports in the USA. The Robert carried cotton from New Orleans until the American Civil War closed that port for a time. In April 1855 the Robert was involved in a collision with the Steam ship North Carolina, which sank off the coast of Ireland. The Robert later sailed to Baker's Island in the Pacific for guano and the crew were involved in suppressing a mutiny by workers, before leaving for Cork only to divert to Auckland when she sprang a leak. The Robert was condemned and sold at auction in 1871 by the underwriters in Auckland, NZ. The Robert was renamed Tokatea in Auckland, NZ. The Tokatea was then sailed to Sydney, Australia and sold. The Tokatea made voyages between Australia, China, Hawaii and the west coast of the USA. Tokatea was carrying a cargo of coal from Newcastle NSW to Honolulu when she hit the reef on Vostock Island, Pacific ocean. The Tokatea sank and the crew sailed 500 miles in open boats before being rescued and taken to Papeete, Tahiti.
Clebsh-Gordan coefficients for the algebra $\mathfrak{gl}_3$ and hypergeometric functions
Creators: name: Artamonov, Dmitry
Publisher: name: arXiv
Year: 2021
Subjects: subject: Representation Theory (math.RT)
subject: FOS: Mathematics

description: The Clebsh-Gordan coefficients for the Lie algebra $\mathfrak{gl}_3$ in the Gelfand-Tsetlin base are calculated. In contrast to previous papers the result is given as an explicit formula. To obtain the result a realization of a representation in the space of functions on the group $GL_3$ is used. The keystone fact that allows to carry the calculation of Clebsh-Gordan coefficients is the theorem that says that functions corresponding to Gelfand-Tsetlin base vectors can be expressed through generalized hypergeometric functions.
ERRATA
Creators: name: Farooq, Mustafa
name: Mehra, Mehul
name: Nguyen, Khoi
Publisher: name: Continental Journal of Biological Sciences
Year: 2024

description: This review of the literature focuses on the role of cortical stimulation in cognitive rehabilitation for stroke patients, examining the underlying mechanisms, innovative therapeutic protocols, and clinical trial data. Cortical stimulation techniques, such as transcranial magnetic stimulation (TMS) and transcranial direct current stimulation (tDCS), have been shown to enhance neuroplasticity by modulating cortical excitability, facilitating recovery of both motor and cognitive functions. The review explores how these stimulation techniques, when integrated with rehabilitation strategies like virtual reality and task-specific training, can accelerate cognitive recovery. The studies reviewed provide evidence that cortical stimulation can promote memory, attention, and problem-solving improvements in stroke survivors, particularly when applied during the critical window of heightened neuroplasticity post-stroke. Clinical trials have demonstrated positive outcomes, but further research is necessary to optimize treatment protocols, personalize interventions, and validate long-term effects. Overall, cortical stimulation is positioned as a promising adjunctive therapy for improving cognitive outcomes in stroke rehabilitation.
3D printing for astronomical mirrors
Creators: name: Roulet, Melanie
name: Atkins, Carolyn
name: Hugot, Emmanuel
name: Lemared, Sabri
name: Lombardo, Simona
name: Ferrari, Marc
Publisher: name: arXiv
Year: 2020
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: 3D printing, also called additive manufacturing, offers a new vision for optical fabrication in term of achievable optical quality and reduction of weight and cost. In this paper we describe two different ways to use this technique in the fabrication process. The first method makes use of 3D printing in the fabrication of warping harnesses for stress polishing, and we apply that to the fabrication of the WFIRST coronagraph off axis parabolas. The second method considers a proof of concept for 3D printing of lightweight X-Ray mirrors, targeting the next generation of X-rays telescopes. Stress polishing is well suited for the fabrication of the high quality off axis parabolas required by the coronagraph to image exoplanets.. Here we describe a new design of warping harness which can generate astigmatism and coma with only one actuator. The idea is to incorporate 3D printing in the manufacturing of the warping harness. The method depicted in this paper demonstrates that we reach the tight precision required at the mirrors surface. Moreover the error introduced by the warping harness fabricated by 3D printing does not impact the final error budget. Concerning the proof of concept project, we investigate 3D printing towards lightweight X-ray mirrors. We present the surface metrology of test samples fabricated by stereo lithography (SLA) and Selective Laser Sintering (SLS) with different materials. The lightweighting of the samples is composed of a series of arches. By complementing 3D printing with finite element analysis topology optimization we can simulate a specific optimum shape for the given input parameters and external boundary conditions. The next set of prototypes is designed taking to account the calculation of topology optimisation.
Origin of black string instability
Creators: name: Kudoh, Hideaki
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: It is argued that many nonextremal black branes exhibit a classical Gregory-Laflamme (GL) instability. Why does the universal instability exist? To find an answer to this question and explore other possible instabilities, we study stability of black strings for all possible types of gravitational perturbation. The perturbations are classified into tensor-, vector-, and scalar-types, according to their behavior on the spherical section of the background metric. The vector and scalar perturbations have exceptional multipole moments, and we have paid particular attention to them. It is shown that for each type of perturbations there is no normalizable negative (unstable) modes, apart from the exceptional mode known as s-wave perturbation which is exactly the GL mode. We discuss the origin of instability and comment on the implication for the correlated-stability conjecture.
description: 19 pages (revtex4), 4 figures; references added, minor corrections
Landau singularities and singularities of holonomic integrals of the Ising class
Creators: name: Boukraa, S.
name: Hassani, S.
name: Maillard, J. -M.
name: Zenine, N.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Mathematical Physics (math-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: High Energy Physics - Theory (hep-th)
subject: Classical Analysis and ODEs (math.CA)
subject: FOS: Physical sciences
subject: FOS: Mathematics
subject: 34M55, 47E05, 81Qxx, 32G34, 34Lxx, 34Mxx, 14Kxx

description: We consider families of multiple and simple integrals of the ``Ising class'' and the linear ordinary differential equations with polynomial coefficients they are solutions of. We compare the full set of singularities given by the roots of the head polynomial of these linear ODE's and the subset of singularities occurring in the integrals, with the singularities obtained from the Landau conditions. For these Ising class integrals, we show that the Landau conditions can be worked out, either to give the singularities of the corresponding linear differential equation or the singularities occurring in the integral. The singular behavior of these integrals is obtained in the self-dual variable $w= s/2/(1+s^2)$, with $s= \sinh(2K)$, where $K=J/kT$ is the usual Ising model coupling constant. Switching to the variable $s$, we show that the singularities of the analytic continuation of series expansions of these integrals actually break the Kramers-Wannier duality. We revisit the singular behavior (J. Phys. A {\bf 38} (2005) 9439-9474) of the third contribution to the magnetic susceptibility of Ising model $χ^{(3)}$ at the points $1+3w+4w^2= 0$ and show that $χ^{(3)}(s)$ is not singular at the corresponding points inside the unit circle $| s |=1$, while its analytical continuation in the variable $s$ is actually singular at the corresponding points $ 2+s+s^2=0$ oustside the unit circle ($| s | > 1$).
description: 34 pages, 1 figure
Failure of separation by quasi-homomorphisms in mapping class groups
Creators: name: Endo, H.
name: Kotschick, D.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Geometric Topology (math.GT)
subject: Group Theory (math.GR)
subject: FOS: Mathematics
subject: 20F65, 20F12, 20F69, 57M07

description: We show that mapping class groups of surfaces of genus at least two contain elements of infinite order that are not conjugate to their inverses, but whose powers have bounded torsion lengths. In particular every homogeneous quasi-homomorphism vanishes on such an element, showing that elements of infinite order not conjugate to their inverses cannot be separated by quasi-homomorphisms.
description: 4 pages
The S-matrix of String Bound States
Creators: name: Arutyunov, Gleb
name: Frolov, Sergey
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We find the S-matrix which describes the scattering of two-particle bound states of the light-cone string sigma model on AdS5xS5. We realize the M-particle bound state representation of the centrally extended su(2|2) algebra on the space of homogeneous (super)symmetric polynomials of degree M depending on two bosonic and two fermionic variables. The scattering matrix S^{MN} of M- and N-particle bound states is a differential operator of degree M+N acting on the product of the corresponding polynomials. We require this operator to obey the invariance condition and the Yang-Baxter equation, and we determine it for the two cases M=1,N=2 and M=N=2. We show that the S-matrices found satisfy generalized physical unitarity, CPT invariance, parity transformation rule and crossing symmetry. Although the dressing factor as a function of four parameters x_1^+,x_1^-,x_2^+,x_2^- is universal for scattering of any bound states, it obeys a crossing symmetry equation which depends on M and N.
description: 65 pages, 2 figures, Latex
Welsh Wreck Web Research Project (North Cardigan Bay). On-line research into the wreck of the: Brigantine Rob The Ranter
Creators: name: Taylor, Melanie
Publisher: name: Archaeology Data Service
Year: 2024

description: Welsh Wreck Web Research Project unpublished report series, 1
description: Rob The Ranter was wrecked at Hell's Mouth a bay at the western end of the Llyn Peninsula.
Analytical bound state solutions of the Dirac equation with the Hulthén plus a class of Yukawa potential including a Coulomb-like tensor interaction
Creators: name: Ahmadov, A. I.
name: Demirci, M.
name: Mustamin, M. F.
name: Aslanova, S. M.
name: Orujova, M. Sh.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We examine the bound state solutions of the Dirac equation under the spin and pseudospin symmetries for a new suggested combined potential, Hulten plus a class of Yukawa potential including a Coulomb-like tensor interaction. An improved scheme is employed to deal with the centrifugal (pseudo-centrifugal) term. Using the Nikiforov-Uvarov and SUSYQM methods, we analytically develop the relativistic energy eigenvalues and associated Dirac spinor components of wave functions. We find that both methods give entirely the same results. Modifiable of our results into some particular potential cases, useful for other physical systems, are also discussed. We obtain complete agreement with the findings of previous works. The spin and pseudospin bound state energy spectra for various levels are presented in the absence as well as the presence of tensor coupling. Both energy spectrums are sensitive with regards to the quantum numbers $κ$ and $n$, as well as the parameter $δ$. We also notice that the degeneracies between Dirac spin and pseudospin doublet eigenstate partners are completely removed by the tensor interaction. Finally, we present the parameter space of allowable bound state regions of potential strength $V_0$ with constants for both considered symmetry limits $C_S$ and $C_{PS}$.
description: 21 pages, 9 figures, 2 tables
Asymmetric frequency conversion with acoustic non-Hermitian space-time varying metamaterial
Creators: name: Wen, Xinhua
name: Zhu, Xinghong
name: Fan, Alvin
name: Tam, Wing Yim
name: Zhu, Jie
name: Lemoult, Fabrice
name: Fink, Mathias
name: Li, Jensen
Publisher: name: arXiv
Year: 2020
Subjects: subject: Applied Physics (physics.app-ph)
subject: Classical Physics (physics.class-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Space-time modulated metamaterials support extraordinary rich applications, such as parametric amplification, frequency conversion and non-reciprocal transmission. However, experimental realization of space-time modulation is highly non-trivial, hindering many interesting physics that are theoretically predicted to be experimentally demonstrated. Here, based on the proposed virtualized metamaterials with software-defined impulse response, we experimentally realize non-Hermitian space-time varying metamaterials for efficient and asymmetric frequency conversion by allowing material gain and loss to be tailor-made and balanced in the time domain. In the application of frequency conversion, the combination of space-time varying capability and non-Hermiticity allows us to diminish the main band through gain-loss balance and to increase the efficiency of side band conversion at the same time. In addition, our approach of software-defined metamaterials is flexible to realize the analogy of quantum interference in an acoustic system with design capability. Applying an additional modulation phase delay between different atoms allows to control such interference to get asymmetric amplification in frequency conversion.
description: 20 pages, 4 figures