cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Multiplicativity of the Double Ramification Cycle
Creators: name: Holmes, David
name: Pixton, Aaron
name: Schmitt, Johannes
Publisher: name: Deutsche Mathematiker-Vereinigung
Year: 2019

description: The double ramification cycle satisfies a basic multiplicative relation ${DRC}_a \cdot {DRC}_b = {DRC}_a \cdot {DRC}_{a + b}$ over the locus of compact-type curves, but this relation fails in the Chow ring of the moduli space of stable curves. We restore this relation over the moduli space of stable curves by introducing an extension of the double ramification cycle to the small b-Chow ring (the colimit of the Chow rings of all smooth blowups of the moduli space). We use this to give evidence for the conjectured equality between the (twisted) double ramification cycle and a cycle $P_g^{d,k}(A)$ described by the second author in Felix Janda, Rahul Pandharipande, Aaron Pixton, and Dimitri Zvonkine. Double ramification cycles on the moduli spaces of curves, Publications math\'ematiques de l'IH\'ES, 125(1):221-266, 2017.
description: DOCUMENTA MATHEMATICA, Vol 24 (2019), p. 545-562
Disorder Effects in the Quantum Hall Effect of Graphene p-n Junctions
Creators: name: Li, Jian
name: Shen, Shun-Qing
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The quantum Hall effect in graphene p-n junctions is studied numerically with emphasis on the effect of disorder at the interface of two adjacent regions. Conductance plateaus are found to be attached to the intensity of the disorder, and are accompanied by universal conductance fluctuations in the bipolar regime, which is in good agreement with theoretical predictions of the random matrix theory on quantum chaotic cavities. The calculated Fano factors can be used in an experimental identification of the underlying transport character.
description: 7 pages, 5 figures
Wie lernt das Gehirn? Die Rolle des Gedächtnisses im Lernprozess
Creators: name: Niekra, Urszula
Publisher: name: Wydawnictwo Uniwersytetu Jana Kochanowskiego w Kielcach
Year: 2022

description: The aim of the present article is to analyse the publication “Memory and school success” by Alain Lieuury, a French professor of cognitive psychology at Rennes University. Knowledge acquisition is a form of learning. Knowledge can be acquired in a number of ways: by reading, listening, observing reality. Our ability to cope with the surrounding world comes from synaptic interconnections between nerve cells of our brain. Memory, which used to be considered the source of the divine knowledge of ancient alchemists, when analysed from the standpoint of contemporary neurology and psychology, takes a complex and heterogeneous form. Alain Lieury, describing biological and psychological mechanisms of memory, shows its significance in knowledge acquisition and offers advice on how to delay the inevitable process of ‘memory aging’.
Waldemar Spyra, Religiöse Bildung und Erziehung im Spannungsfeld von Pastoral, Politik und Patriotismus. Religionsunterricht und Katechese im "Oppelner Schlesien" seit 1945
Creators: name: Alexander, Manfred
Publisher: name: Zeitschrift für Ostmitteleuropa-Forschung
Year: 2002

description: Zeitschrift für Ostmitteleuropa-Forschung, Bd. 51 Nr. 1 (2002)
Modelling a whole building stock: domestic, non-domestic and mixed use
Creators: name: Evans, Stephen
name: Liddiard, Rob
name: Steadman, Philip
Publisher: name: Taylor & Francis
Year: 2017
Subjects: subject: Medicine
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Sociology
subject: FOS: Sociology
subject: 80699 Information Systems not elsewhere classified
subject: FOS: Computer and information sciences
subject: Inorganic Chemistry
subject: Science Policy

description: Work on energy use in buildings – in university research, professional practice and government – has tended to draw a broad distinction between ‘the domestic stock’ and ‘the non-domestic stock’. A further tendency has been to focus attention on types of non-domestic buildings devoted to single uses (e.g. offices, shops or hospitals). This paper reports an empirical research programme in which the complete building stock in large areas of England and Wales is comprehensively represented in great detail, using a new method and model called 3DStock. The model breaks down activities by floor level and within each floor of every building. The results show that the extent of mixing of uses is much greater than has previously been acknowledged, especially towards the centres and in the older parts of towns and cities. These mixed-activity buildings are sometimes relatively simple combinations of domestic and non-domestic, e.g. urban retail with flats above, while others are complex mixtures of different non-domestic activities. The model can be used to investigate how these complex relationships influence energy use. It is argued that, at the larger scale, explicit account needs to be taken of the mixing of uses in future stock models for research and policy-making.
On Dynamics of Integrate-and-Fire Neural Networks with Conductance Based Synapses
Creators: name: Cessac, B.
name: Vieville, T.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Biological Physics (physics.bio-ph)
subject: Dynamical Systems (math.DS)
subject: Chaotic Dynamics (nlin.CD)
subject: Neurons and Cognition (q-bio.NC)
subject: FOS: Physical sciences
subject: FOS: Mathematics
subject: FOS: Biological sciences

description: We present a mathematical analysis of a networks with Integrate-and-Fire neurons and adaptive conductances. Taking into account the realistic fact that the spike time is only known within some \textit{finite} precision, we propose a model where spikes are effective at times multiple of a characteristic time scale $δ$, where $δ$ can be \textit{arbitrary} small (in particular, well beyond the numerical precision). We make a complete mathematical characterization of the model-dynamics and obtain the following results. The asymptotic dynamics is composed by finitely many stable periodic orbits, whose number and period can be arbitrary large and can diverge in a region of the synaptic weights space, traditionally called the "edge of chaos", a notion mathematically well defined in the present paper. Furthermore, except at the edge of chaos, there is a one-to-one correspondence between the membrane potential trajectories and the raster plot. This shows that the neural code is entirely "in the spikes" in this case. As a key tool, we introduce an order parameter, easy to compute numerically, and closely related to a natural notion of entropy, providing a relevant characterization of the computational capabilities of the network. This allows us to compare the computational capabilities of leaky and Integrate-and-Fire models and conductance based models. The present study considers networks with constant input, and without time-dependent plasticity, but the framework has been designed for both extensions.
description: 36 pages, 9 figures
Małgorzata Giżejewska, Polacy na Kołymie 1940-1943
Creators: name: Chiari, Bernhard
Publisher: name: Zeitschrift für Ostmitteleuropa-Forschung
Year: 2000

description: Zeitschrift für Ostmitteleuropa-Forschung, Bd. 49 Nr. 4 (2000)
Československo- sovetské vztahy v diplomatickych jednánich 1939-1945
Creators: name: Alte, Rüdiger
Publisher: name: Zeitschrift für Ostmitteleuropa-Forschung
Year: 2001

description: Zeitschrift für Ostmitteleuropa-Forschung, Bd. 50 Nr. 2 (2001)
Armia Krajowa na Nowogródczyźnie i Wileńszczyźnie (1942-1944) w świetle dokumentów sowieckich
Creators: name: Chiari, Bernhard
Publisher: name: Zeitschrift für Ostmitteleuropa-Forschung
Year: 2000

description: Zeitschrift für Ostmitteleuropa-Forschung, Bd. 49 Nr. 4 (2000)
Karol Sauerland, Dreissig Silberlinge. Denunziation: Gegenwart und Geschichte
Creators: name: Krzoska, Markus
Publisher: name: Zeitschrift für Ostmitteleuropa-Forschung
Year: 2001

description: Zeitschrift für Ostmitteleuropa-Forschung, Bd. 50 Nr. 2 (2001)
Schlesier des 15. bis 20. Jahrhunderts. (Schlesische Lebensbilder, Bd. 7)
Creators: name: Bahlcke, Joachim
Publisher: name: Zeitschrift für Ostmitteleuropa-Forschung
Year: 2002

description: Zeitschrift für Ostmitteleuropa-Forschung, Bd. 51 Nr. 1 (2002)
Zygmunt Boradyn, Andrzej Chmielarz, Henryk Piskunowicz, Z dziejów Armii Krajowej na Nowogródczyźnie i Wileńszczyźnie (1941-1945)
Creators: name: Chiari, Bernhard
Publisher: name: Zeitschrift für Ostmitteleuropa-Forschung
Year: 2000

description: Zeitschrift für Ostmitteleuropa-Forschung, Bd. 49 Nr. 4 (2000)
Nucleon-nucleon potentials from Delta-full chiral effective-field-theory and implications
Creators: name: Nosyk, Y.
name: Entem, D. R.
name: Machleidt, R.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Nuclear Theory (nucl-th)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: We closely investigate NN potentials based upon the Delta-full version of chiral effective field theory. We find that recently constructed NN potentials of this kind, which (when applied together with three-nucleon forces) were presented as predicting accurate binding energies and radii for a range of nuclei from A=16 to A=132 and providing accurate equations of state for nuclear matter, yield a chi^2/datum of 60 for the reproduction of the pp data below 100 MeV laboratory energy. This chi^2 is more than three times what the Hamada-Johnston potential of the year of 1962 achieved already some 60 years ago. We perceive this historical fact as concerning in view of the current emphasis on precision. We are able to trace the very large chi^2 as well as the apparent success of the potentials in nuclear structure to unrealistic predictions for P-wave states, in which the Delta-full NNLO potentials are off by up to 40 times the NNLO truncation errors. In fact, we show that, the worse the description of the P-wave states, the better the predictions in nuclear structure. Thus, these potentials cannot be seen as the solution to the outstanding problems in current miscroscopic nuclear structure physics.
description: 18 pages, 4 figures, 7 tables. Abstract language tamed upon recommendation by referee; all results and all conclusions unchanged
Porządkowanie chaosu, czyli klasyfikacje masek
Creators: name: Karwatowska, Małgorzata
name: Głażewska, Ewa
Publisher: name: Wydawnictwo Uniwersytetu Jana Kochanowskiego w Kielcach
Year: 2022

description: Penetracja stron internetowych pozwoliła autorkom dotrzeć do 300 różnego rodzaju masek pandemicznych wyrażających „maskowe trendy modowe”. Owa „nadwyżka produkcyjna” tworzonych/produkowanych masek sprawiła, że zamierzeniem badaczek stała się potrzeba wprowadzenia ich typologii. Celem artykułu jest zatem nie tylko przybliżenie historii maski – będącej przecież od zawsze formą komunikacji – ale dokonanie klasyfikacji zebranych artefaktów. Autorki proponują dwa kryteria podziału: (1) na maski oryginalne (niekiedy cechujące się wręcz ekscentrycznością) i nieoryginalne, typowe (charakteryzujące się przede wszystkim dekoracyjnością) oraz (2) na maski tematyczne i semiotyczne. W obrębie głównych kategorii badaczki wydzielają subkategorie. Metodą przyjętą w badaniach jest analiza treści.
Dynamical Friction in Nonlocal Gravity
Creators: name: Roshan, Mahmood
name: Mashhoon, Bahram
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We study dynamical friction in the Newtonian regime of nonlocal gravity (NLG), which is a classical nonlocal generalization of Einstein's theory of gravitation. The nonlocal aspect of NLG simulates dark matter. The attributes of the resulting effective dark matter are described and the main physical predictions of nonlocal gravity, which has a characteristic lengthscale of order 1 kpc, for galactic dynamics are presented. Within the framework of NLG, we derive the analogue of Chandrasekhar's formula for dynamical friction. The astrophysical implications of the results for the apparent rotation of a central bar subject to dynamical friction in a barred spiral galaxy are briefly discussed.
description: 26 pages, 1 figure; v2: improved version to appear in ApJ; v3: typos corrected, ref. [36] updated
O sztuce anagramowania
Creators: name: Dolecka, Agnieszka
Publisher: name: Wydawnictwo Uniwersytetu Jana Kochanowskiego w Kielcach
Year: 2022

description: W artykule przedstawiono pochodzenie, ewolucję i poetykę anagramu, nie tylko jako permutacyjnej gry słownej, służącej rozrywce, ale istotnie ważnego zjawiska językowego, zakorzenionych w dziejach piśmiennictwa prób eksperymentów wersyfikacyjnych i stworzenia nowej jakości literackiej. W wierszach, zagadkach, innych formach literackich, zawierających anagramy utworzone z pojedynczych słów, fraz czy zdań, pojawiają się nowe i często zaskakujące możliwości poszerzania pól semantycznych. Twórcy współczesnej na nowo odkryli sztukę anagramowania.
A single-photon transistor using nano-scale surface plasmons
Creators: name: Chang, D. E.
name: Sørensen, A. S.
name: Demler, E. A.
name: Lukin, M. D.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: It is well known that light quanta (photons) can interact with each other in nonlinear media, much like massive particles do, but in practice these interactions are usually very weak. Here we describe a novel approach to realize strong nonlinear interactions at the single-photon level. Our method makes use of recently demonstrated efficient coupling between individual optical emitters and tightly confined, propagating surface plasmon excitations on conducting nanowires. We show that this system can act as a nonlinear two-photon switch for incident photons propagating along the nanowire, which can be coherently controlled using quantum optical techniques. As a novel application, we discuss how the interaction can be tailored to create a single-photon transistor, where the presence or absence of a single incident photon in a ``gate'' field is sufficient to completely control the propagation of subsequent ``signal'' photons.
description: 20 pages, 4 figures
Sequential change detection revisited
Creators: name: Moustakides, George V.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Statistics Theory (math.ST)
subject: FOS: Mathematics
subject: 62L10 (Primary) 62L15, 60G40 (Secondary)

description: In sequential change detection, existing performance measures differ significantly in the way they treat the time of change. By modeling this quantity as a random time, we introduce a general framework capable of capturing and better understanding most well-known criteria and also propose new ones. For a specific new criterion that constitutes an extension to Lorden's performance measure, we offer the optimum structure for detecting a change in the constant drift of a Brownian motion and a formula for the corresponding optimum performance.
description: Published in at http://dx.doi.org/10.1214/009053607000000938 the Annals of Statistics (http://www.imstat.org/aos/) by the Institute of Mathematical Statistics (http://www.imstat.org)
The Gradient Mechanism in a Communication Network
Creators: name: Mukherjee, Satyam
name: Gupte, Neelima
Publisher: name: arXiv
Year: 2007
Subjects: subject: Physics and Society (physics.soc-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Adaptation and Self-Organizing Systems (nlin.AO)
subject: FOS: Physical sciences

description: We study the efficiency of the gradient mechanism of message transfer in a $2-d$ communication network of regular nodes and randomly distributed hubs. Each hub on the network is assigned some randomly chosen capacity and hubs with lower capacities are connected to the hubs with maximum capacity. The average travel time of single messages traveling on this lattice, plotted as a function of hub density, shows q-exponential behavior. At high hub densities, this distribution can be fitted well by a power law. We also study the relaxation behavior of the network when a large number of messages are created simultaneously at random locations, and travel on the network towards their designated destinations. For this situation, in the absence of the gradient mechanism, the network can show congestion effects due to the formation of transport traps. We show that if hubs of high betweenness centrality are connected by the gradient mechanism, efficient decongestion can be achieved. The gradient mechanism is less prone to the formation of traps than other decongestion schemes. We also study the spatial configurations of transport traps, and propose minimal strategies for their elimination.
description: 24 pages, 25 figures
On the Connection Between Metal Absorbers and Quasar Nebulae
Creators: name: Chelouche, Doron
name: Ménard, Brice
name: Bowen, David V.
name: Gnat, Orly
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We establish a simple model for the distribution of cold gas around L* galaxies using a large set of observational constraints on the properties of strong MgII absorber systems. Our analysis suggests that the halos of L* galaxies are filled with cool gaseous clouds having sizes of order 1kpc and densities of ~10^{-2} cm^{-3}. We then investigate the physical effects of cloud irradiation by a quasar and study the resulting spectral signatures. We show that quasar activity gives rise to (i) extended narrow-line emission on ~100kpc scales and (ii) an anisotropy in the properties of the absorbing gas arising from the geometry of the quasar radiation field. Provided that quasars reside in halos several times more massive than those of L* galaxies, our model predictions appear to be in agreement with observations of narrow emission-line nebulae around quasars and the recent detections of ~100kpc cold gaseous envelopes around those objects, suggesting a common origin for these phenomena. We discuss the implications of our results for understanding absorption systems, probing quasar environments at high redshifts, and testing the quasar unification scheme.
description: 15 pages, 13 figures (ApJ submitted)
Oriented Cohomology Sheaves on Double Moment Graphs
Creators: name: Devyatov, Rostislav
name: Lanini, Martina
name: Zainoulline, Kirill
Publisher: name: Deutsche Mathematiker-Vereinigung
Year: 2019

description: In the present paper we extend the theory of sheaves on moment graphs due to Braden-MacPherson and Fiebig to the context of an arbitrary oriented equivariant cohomology h (e.g. to algebraic cobordism). We introduce and investigate structure h-sheaves on double moment graphs to describe equivariant oriented cohomology of products of flag varieties. We show that in the case of a total flag variety $X$ of Dynkin type $A$ the space of global sections of the double structure h-sheaf also describes the endomorphism ring of the equivariant h-motive of $X$.
description: DOCUMENTA MATHEMATICA, Vol 24 (2019), p. 563-608
Wpływ hierarchicznej struktury instytucjonalnej na zachowania językowe grupy na przykładzie wojska i socjolektu żołnierskiego w czasach Ludowego Wojska Polskiego
Creators: name: Smolińska, Mariola
Publisher: name: Wydawnictwo Uniwersytetu Jana Kochanowskiego w Kielcach
Year: 2022

description: W artykule przedstawiono temat grupowych zachowań językowych na przykładzie instytucji wojska i społeczności żołnierzy-rekrutów, odbywających obowiązkową zasadniczą służbę wojskową w Ludowym Wojsku Polskim w latach 70. i 80. XX wieku. W tym okresie miało miejsce negatywne zjawisko tzw. fali żołnierskiej. W ostatnim dziesięcioleciu ukazało się kilka dzienników byłych żołnierzy m.in. J. Ruszara, A. Pawlaka czy W. Pasławskiego, odbywających służbę wojskową w czasach PRL-u, które wykorzystano w niniejszym artykule do analizy socjolingwistycznej tego zjawiska. Analiza tego materiału pozwoliła na wykazanie zależności między zhierarchizowaną strukturą instytucji z własnym systemem uwarstwienia a zachowaniem językowym grupy, wartościującym w specyficzny sposób wojskową rzeczywistość w badanym okresie.
Statistical-mechanics approach to a reinforcement learning model with memory
Creators: name: Lipowski, Adam
name: Gontarek, Krzysztof
name: Ausloos, Marcel
Publisher: name: arXiv
Year: 2008
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Computer Science and Game Theory (cs.GT)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: We introduce a two-player model of reinforcement learning with memory. Past actions of an iterated game are stored in a memory and used to determine player's next action. To examine the behaviour of the model some approximate methods are used and confronted against numerical simulations and exact master equation. When the length of memory of players increases to infinity the model undergoes an absorbing-state phase transition. Performance of examined strategies is checked in the prisoner' dilemma game. It turns out that it is advantageous to have a large memory in symmetric games, but it is better to have a short memory in asymmetric ones.
description: 6 pages, some additional numerical calculations
Black Hole Gravitational Potential Enhanced Fallback Accretion onto the Nascent Lighter Compact Object: Tentative Evidence in the O3 Run Data of LIGO/Virgo
Creators: name: Tang, Shao-Peng
name: Li, Yin-Jie
name: Wang, Yuan-Zhu
name: Fan, Yi-Zhong
name: Wei, Da-Ming
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: In a binary system, the gravitational potential of the primary black hole may play an important role in enhancing the fallback accretion onto the lighter compact object newly formed in the second supernova explosion. As a result, the final masses of the binary compact objects would be correlated, as suggested recently by Safarzadeh \& Wysocki. In this work, we analyze the mass distribution of four gravitational-wave events, which are characterized by both a small mass ratio and a low mass ($\leq 5M_\odot$) of the light component, and find tentative evidence for a mass correlation among the objects. To evaluate the feasibility of testing such a hypothesis with upcoming observations, we carry out simulations with a mock population and perform Bayesian hierarchical inference for the mass distribution. We find that with dozens of low mass ratio events, whether there exists correlation in the component mass distributions or not can be robustly tested and the correlation, if it exists, can be well determined.
description: 8 pages, 3 figures, ApJ published
Festschrift für Vello Helk zum 75. Geburtstag
Creators: name: Pistohlkors, Gert Von
Publisher: name: Zeitschrift für Ostmitteleuropa-Forschung
Year: 2001

description: Zeitschrift für Ostmitteleuropa-Forschung, Bd. 50 Nr. 4 (2001)
Ein Haus für Wissenschaft und Kunst - das Dommuseum in Riga. Templis Zinātnei um Mākslai - Doma Muzejs Rīgā
Creators: name: Nies, Susanne
Publisher: name: Zeitschrift für Ostmitteleuropa-Forschung
Year: 2002

description: Zeitschrift für Ostmitteleuropa-Forschung, Bd. 51 Nr. 1 (2002)
On Free Resolutions of Iwasawa Modules
Creators: name: Nichifor, Alexandra
name: Palvannan, Bharathwaj
Publisher: name: Deutsche Mathematiker-Vereinigung
Year: 2019

description: Let $\Lambda$ (isomorphic to $\mathbb{Z}_p[[T]]$) denote the usual Iwasawa algebra and $G$ denote the Galois group of a finite Galois extension $L/K$ of totally real fields. When the non-primitive Iwasawa module over the cyclotomic $\mathbb{Z}_p$-extension has a free resolution of length one over the group ring $\Lambda[G]$, we prove that the validity of the non-commutative Iwasawa main conjecture allows us to find a representative for the non-primitive $p$-adic $L$-function (which is an element of a $K_1$-group) in a maximal $\Lambda$-order. This integrality result involves a study of the Dieudonn\'e determinant. Using a cohomolgoical criterion of Greenberg, we also deduce the precise conditions under which the non-primitive Iwasawa module has a free resolution of length one. As one application of the last result, we consider an elliptic curve over $\mathbb{Q}$ with a cyclic isogeny of degree $p^2$. We relate the characteristic ideal in the ring $\Lambda$ of the Pontryagin dual of its non-primitive Selmer group to two characteristic ideals, viewed as elements of group rings over $\Lambda$, associated to two non-primitive classical Iwasawa~modules.
description: DOCUMENTA MATHEMATICA, Vol 24 (2019), p. 609-662
Properties of heat treated diatomite
Creators: name: Aota, John Junpachi
Publisher: name: University of British Columbia
Year: 2010

description: The density, strength and thermal conductivity of diatomite compacts were determined after heating the specimens in the temperature range between 200 and 1050 °C. The linear dimensional change of these specimens on heating was also measured. All properties changed during heating with the increase in firing temperatures and especially above 800 °C. The reduction of density, strength and thermal conductivity of diatomite compacts on firing at up to 600 °C can be attributed to the mass loss due to decomposition of the constituents such as hydrated silica, carbonates, etc. Heating these compacts above 600 °C resulted in shrinkage with a concomitant increase in bulk density, strength and thermal conductivity. Attempts were made to evaluate the fundamental factors which may be contributing to this change of properties during heat treatment. Analyses of data have been made using a sintering model, which assumes that after decomposition diatomite particles are composed of a large number of microspheres and that the change of properties (i.e., increase in density, strength and thermal conductivity) can be attributed to the growth of interparticle contact areas (similar to neck growth during sintering) . Equations for shrinkage, thermal conductivity and strength are all related to the bulk density and weight loss of the compacts, and are given by: For shrinkage, [formula omitted] For thermal conductivity, [formula omitted] For strength, [formula omitted] The validity of these equations has been tested with the experimental data of shrinkage, bulk density, weight loss, strength and thermal conductivity of pure diatomite compacts. The good agreement between the experimental results and the equations may be indicative that it is the increase in interparticle contact areas during the heat treatment which results in the increase in strength, bulk density and thermal conductivity. The general applicability of the equations, developed in order to explain the change in properties of pure diatomite compacts, was further tested with experimental data obtained from a commercial brand of diatomite insulating bricks.
Photon lasing in a GaAs microcavity: similarities with a polariton condensate
Creators: name: Bajoni, Daniele
name: Senellart, Pascale
name: Lemaître, Aristide
name: Bloch, Jacqueline
Publisher: name: arXiv
Year: 2007
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We study experimentally the lasing regime of a GaAs based microcavity sample under strong optical pumping. The very same sample exhibits the strong coupling regime at low excitation power with a Rabi splitting as large as 15 meV. We show that some features which may be considered as experimental evidence of polariton Bose Einstein condensation are also observed in the weak coupling regime when the cavity is behaving as a regular photon laser. In particular, the emission pattern in the lasing regime displays a sharp peak near the energy minimum followed by a Boltzmann distribution at higher energies.
description: 5 pages, 3 figures, published in Physical Review B
Excited Kinks as Quantum States
Creators: name: Evslin, Jarah
name: Guo, Hengyuan
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: At one loop, quantum kinks are described by a sum of quantum harmonic oscillator Hamiltonians, and so their spectra are known exactly. We find the first correction beyond one loop to the quantum states corresponding to kinks with an excited bound or unbound normal mode, and also the corresponding two-loop correction to the energy cost of exciting the normal mode. In the case of unbound normal modes, this correction is equal to sum of the corresponding nonrelativistic kinetic energy plus the usual one-loop correction to the mass of the corresponding plane wave in the absence of a kink. We also sketch a diagrammatic method for such calculations.
description: 22+7 pages, 3 embedded figures
"Zachodnia Białoruś" 17 IX 1939-22 VI 1941. Wydarzenia i losy ludzkie. Bd. 1: Rok 1939
Creators: name: Chiari, Bernhard
Publisher: name: Zeitschrift für Ostmitteleuropa-Forschung
Year: 2000

description: Zeitschrift für Ostmitteleuropa-Forschung, Bd. 49 Nr. 4 (2000)
Adriana Szymańska „czasująca”
Creators: name: Wądolny-Tatar, Katarzyna
Publisher: name: Wydawnictwo Uniwersytetu Jana Kochanowskiego w Kielcach
Year: 2022

description: Imiesłowowe określenie „czasująca” zapożyczam od literaturoznawczyni Anny Legeżyńskiej, która zastosowała je w opisie poezji kobiecej w kontekście tożsamościowego projektu „ja” lirycznego, pośrednio zaś z filozofii Martina Heideggera. Poetycka świadomość czasu w twórczości Adriany Szymańskiej przejawia się w rozmaitych aktywnościach »ja« „czasującego”, czyli zanurzonego w czasie i zarazem obejmującego jego doświadczenie wielokierunkową refleksją temporalną. Autorskie i zewnątrztekstowe pozostaje natomiast użycie czasu jako kategorii językowo-kulturowej czy kompozycyjno-genologicznej. W późnej poezji Szymańskiej doświadczenie czasu wyraża się poprzez pamięć (i jej metafory), postpamięć, opisy relacji matrylinearnych, rodzinne reprezentacje polskich losów, koncepcje natury wpisujące się w idee panbiologizmu czy posthumanizm. Kontrsygnatury poetki jako tekstowe odpowiedzi na różne lektury, dedykacje, motta wytwarzają hermeneutyczne pole relacji w twórczości Adriany Szymańskiej. Jest ono efektem długoletniej aktywnej obecności autorki w przestrzeni literackiej i jej krytycznoliterackiej działalności.
Directed Paths in a Wedge
Creators: name: van Rensburg, E J Janse
name: Prellberg, T
name: Rechnitzer, A
Publisher: name: arXiv
Year: 2007
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Mathematical Physics (math-ph)
subject: Combinatorics (math.CO)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: Directed paths have been used extensively in the scientific literature as a model of a linear polymer. Such paths models in particular the conformational entropy of a linear polymer and the effects it has on the free energy. These directed models are simplified versions of the self-avoiding walk, but they do nevertheless give insight into the phase behaviour of a polymer, and also serve as a tool to study the effects of conformational degrees of freedom in the behaviour of a linear polymer. In this paper we examine a directed path model of a linear polymer in a confining geometry (a wedge). The main focus of our attention is $c_n$, the number of directed lattice paths of length $n$ steps which takes steps in the North-East and South-East directions and which is confined to the wedge $Y=\pm X/p$, where $p$ is an integer. In this paper we examine the case $p=2$ in detail, and we determine the generating function using the iterated kernel method. We also examine the asymtotics of $c_n$. In particular, we show that $$ c_n = [0.67874...]\times 2^{n-1}(1+(-1)^n) + O((4/3^{3/4})^{n+o(n)}) + o((4/3^{3/4})^n) $$ where we can determine the constant $0.67874...$ to arbitrary accuracy with little effort.
Deeply decarbonizing residential and urban central districts through photovoltaics plus electric vehicle applications
Creators: name: Kobashi, Takuro
name: Choi, Younghun
name: Hirano, Yujiro
name: Yamagata, Yoshiki
name: Say, Kelvin
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Economics (econ.GN)
subject: FOS: Economics and business

description: With the costs of renewable energy technologies declining, new forms of urban energy systems are emerging that can be established in a cost-effective way. The SolarEV City concept has been proposed that uses rooftop Photovoltaics (PV) to its maximum extent, combined with Electric Vehicle (EV) with bi-directional charging for energy storage. Urban environments consist of various areas, such as residential and commercial districts, with different energy consumption patterns, building structures, and car parks. The cost effectiveness and decarbonization potentials of PV + EV and PV (+ battery) systems vary across these different urban environments and change over time as cost structures gradually shift. To evaluate these characteristics, we performed techno-economic analyses of PV, battery, and EV technologies for a residential area in Shinchi, Fukushima and the central commercial district of Kyoto, Japan between 2020 and 2040. We found that PV + EV and PV only systems in 2020 are already cost competitive relative to existing energy systems (grid electricity and gasoline car). In particular, the PV + EV system rapidly increases its economic advantage over time, particularly in the residential district which has larger PV capacity and EV battery storage relative to the size of energy demand. Electricity exchanges between neighbors (e.g., peer-to-peer or microgrid) further enhanced the economic value (net present value) and decarbonization potential of PV + EV systems up to 23 percent and 7 percent in 2030, respectively. These outcomes have important strategic implications for urban decarbonization over the coming decades.
description: 40 pages
Rational Curves on Fibered Calabi-Yau Manifolds
Creators: name: Diverio, Simone
name: Fontanari, Claudio
name: Martinelli, Diletta
Publisher: name: Deutsche Mathematiker-Vereinigung
Year: 2019

description: We show that a smooth projective complex manifold of dimension greater than two endowed with an elliptic fiber space structure and with finite fundamental group always contains a rational curve, provided its canonical bundle is relatively trivial.
As an application of this result, we prove that any Calabi-Yau manifold that admits a fibration onto a curve whose general fiber is an abelian variety always contains a rational curve.
description: DOCUMENTA MATHEMATICA, Vol 24 (2019), p. 663-675
Schule als Lernort für Fremdsprachen in den Auffassungen von Lernenden und Lehrenden: theoretische Grundlagen aus der Sicht der soziokulturellen Theorie des Fremdsprachenlernens und einige Stimmen aus dem Klassenzimmer
Creators: name: Nerlicki, Krzysztof
Publisher: name: Wydawnictwo Uniwersytetu Jana Kochanowskiego w Kielcach
Year: 2022

description: Im Mittelpunkt des vorliegenden Beitrags stehen die Auffassungen von Lernenden und Lehrenden hinsichtlich des schulischen Fremdsprachenlernens. Theoretische Grundlagen für die Entstehung und Erklärung von Auffassungen bildet die Soziokulturelle Theorie des Fremdsprachenlernens, die sich auf die Ansätze von Wygotski und Bachtin bezieht. Die vertretenen Auffassungen haben einen polyphonen Charakter: sie sind Resultanten persönlicher und gemeinsamer Erfahrungen; das sind eigene Stimmen sowie der anderen, die im Fremdsprachenunterricht Gemeinschaften mit ihren eigenen Regeln und Arbeitsteilungen bilden. Der Fokus wird auf drei Faktoren gerichtet: a) das Wesen der Sprache, b) das Wesen der Fremdsprache als Lernobjekt und c) das Bild des Fremdsprachenunterrichts. Die angeführten Beispiele von Auffassungen stammen aus der Forschungsliteratur und den unveröffentlichten Daten des Autors.
„Zdrój uliczny” Janusza Szubera jako pożegnanie
Creators: name: Pasterski, Janusz
Publisher: name: Wydawnictwo Uniwersytetu Jana Kochanowskiego w Kielcach
Year: 2022

description: Artykuł poświęcony ostatniemu tomowi poetyckiemu zmarłego w 2020 roku Janusza Szubera. Zbiór Zdrój uliczny przewidziany jako publikacja okolicznościowa na 73. urodziny poety stał się nieoczekiwanie poetyckim gestem pożegnania. Autor analizuje tom w kontekście toposu pożegnania i odniesień o charakterze testamentalnym. Rozważania zostały osadzone w perspektywie całej twórczości poetyckiej Janusza Szubera i jej kluczowych cech. W konsekwencji poezja Szubera odsłania swój sens uniwersalny, który pozwala widzieć w niej odbicie egzystencjalnych, historycznych, społecznych, a nawet metafizycznych problemów człowieka.
Non-invasive time-sorting in radio-frequency compressed ultrafast electron diffraction
Creators: name: Zhao, Lingrong
name: Wu, Jun
name: Wang, Zhe
name: Tang, Heng
name: Zou, Xiao
name: Jiang, Tao
name: Zhu, Pengfei
name: Xiang, Dao
name: Zhang, Jie
Publisher: name: arXiv
Year: 2021
Subjects: subject: Accelerator Physics (physics.acc-ph)
subject: Atomic and Molecular Clusters (physics.atm-clus)
subject: Instrumentation and Detectors (physics.ins-det)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We demonstrate a non-invasive time-sorting method for ultrafast electron diffraction (UED) experiments with radio-frequency (rf) compressed electron beams. We show that electron beam energy and arrival time at the sample after rf compression are strongly correlated such that the arrival time jitter may be corrected through measurement of the beam energy. The method requires minimal change to the infrastructure of most of the UED machines and is applicable to both keV and MeV UED. In our experiment with ~3 MeV beam, the timing jitter after rf compression is corrected with 35 fs root-mean-square (rms) accuracy, limited by the 3x10^-4 energy stability. For keV UED with high energy stability, sub-10 fs accuracy in time-sorting should be readily achievable. This time-sorting technique allows us to retrieve the 2.5 THz oscillation related to coherent A1g phonon in laser excited Bismuth film and extends the temporal resolution of UED to a regime far beyond the 100-200 fs rms jitter limitation.
Topological and combinatoric methods for studying sums of squares
Creators: name: Yiu, Paul Yu-Hung
Publisher: name: University of British Columbia
Year: 2010

description: We study sums of squares formulae from the perspective of normed bilinear maps and their Hopf constructions. We begin with the geometric properties of quadratic forms between euclidean spheres. Let F: Sm → Sn be a quadratic form. For every point q in the image, the inverse image F⁻¹ (q) is the intersection of Sm with a linear subspace wq, whose dimension can be determined easily. In fact, for every k ≤ m+1 with nonempty Yk = {q ∈ Sn: dim Wq = k}, the restriction F⁻¹ (Yk) → Yk is a great (k-1) - sphere bundle. The quadratic form F is the Hopf construction of a normed bilinear map if and only if it admits a pair of "poles" ±p such that dim Wp + dim W₋p = m+1. In this case, the inverse images of points on a "meridian", save possibly the poles, are mutually isoclinic. Furthermore, the collection of all poles forms a great sphere of relatively low dimension. We also prove that the classical Hopf fibrations are the only nonconstant quadratic forms which are harmonic morphisms in the sense that the composite with every real valued harmonic function is again harmonic. Hidden in a quadratic form F: Sm → Sn are nonsingular bilinear maps Rk x Rm-k⁺¹ → Rn, one for each point in the image, all representing the homotopy class of F, which lies in Im J. Moreover, every hidden nonsingular bilinear map can be homotoped to a normed bilinear map. The existence of one sums of squares formula, therefore, anticipates others which cannot be obtained simply by setting some of the indeterminates to zero. These geometric and topological properties of quadratic forms are then used, together with homotopy theory results in the literature, to deduce that certain sums of squares formulae cannot exist, notably of types [12,12,20] and [16,16,24]. We also prove that there is no nonconstant quadratic form S²⁵ → S²³. Sums of squares formulae with integer coefficients are equivalent to "intercalate matrices of colors with appropriate signs". This combinatorial nature enables us to establish a stronger nonexistence result: no sums of squares formula of type [16,16, 28] can exist if only integer coefficients are permitted. We also classify integral [10,10,16] formulae, and show that they all represent ±2Ʋ∈ π [s over 3]. With the aid of the KO theory of real projective spaces, we determine, for given δ ≤ 5 and s, the greatest possible r for which there exists an [r,s,s+δ] formula. An explicit solution of the classical Hurwitz-Radon matrix equations is also recorded.
When bigger is faster: a self-van Hove analysis of the enhanced self-diffusion of non-commensurate guest particles in smectics
Creators: name: Lettinga, M. Paul
name: Alvarez, Laura
name: Korculanin, Olivera
name: Grelet, Eric
Publisher: name: arXiv
Year: 2021
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We investigate the anomalous dynamics in smectic phases of short host rods where, counter-intuitively, long guest rod-shaped particles diffusive faster than the short host ones, due to their precise size mismatch. In addition to the previously reported mean-square displacement, we analyze the time evolution of the Self-van Hove functions G(r,t), as this probability density function uncovers intrinsic heterogeneous dynamics. Through this analysis, we show that the dynamics of the host particles parallel to the director becomes non-gaussian and therefore heterogeneous after the nematic-to-smectic-A phase transition, even though it exhibits a nearly diffusive behavior according to its mean-square displacement. In contrast, the non-commensurate guest particles display Gaussian dynamics of the parallel motion, up to the transition to the smectic-B phase. Thus, we show that the Self-van Hove function is a very sensitive probe to account for the instantaneous and heterogeneous dynamics of our system, and should be more widely considered as a quantitative and complementary approach of the classical mean-square displacement characterization in diffusion processes.
description: 10 pages, 9 figures, the article has been accepted by the Journal of Chemical Physics
The pre-cataclysmic variable, LTT560
Creators: name: Tappert, C.
name: Gaensicke, B. T.
name: Schmidtobreick, L.
name: Aungwerojwit, A.
name: Mennickent, R. E.
name: Koester, D.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: System parameters of the object LTT560 are determined in order to clarify its nature and evolutionary status. We apply time-series photometry to reveal orbital modulations of the light curve, time-series spectroscopy to measure radial velocities of features from both the primary and the secondary star, and flux-calibrated spectroscopy to derive temperatures of both components. We find that LTT560 is composed of a low temperature T~7500K DA white dwarf as the primary and an M5.5+-1 main-sequence star as the secondary component. The current orbital period is Porb=3.54(07)h. We derive a mass ratio Msec/Mwd = 0.36(03) and estimate the distance to d=25-40pc. Long-term variation of the orbital light curve and an additional H-alpha emission component on the white dwarf indicate activity in the system, probably in the form of flaring and/or accretion events.
description: Accepted for publication in A&A
Acceptance of Digital Tools for Cross-Cultural Training: A Study of Moroccan Public University Staff
Creators: name: Bouziane, Karima
name: Bouziane, Abdelmounim
Publisher: name: Wydawnictwo Uniwersytetu Jana Kochanowskiego w Kielcach
Year: 2025

description: This study investigates the acceptance of ICT for training and cross-cultural and experience exchange among employees in Moroccan public universities. The purpose is to contribute to the ongoing efforts to modernize the structure of public universities in Morocco. The research employs a quantitative approach, utilizing a structured questionnaire for data collection, and employs linear regression analysis in SPSS to examine the factors influencing the acceptance of ICT in cross cultural training by employees. Our study was conducted in the Casablanca-Settat region. The population is composed of the administrative staff of Chouaib Doukkali University, Hassan II University, and Hassan I University. Our sample comprised 480 individuals out of 1491. The response rate was 81%. The results highlight (Among others) that perceived usefulness, financial considerations, and the motivation for learning are the main factors that influence the acceptance of using ICT in international exchange experiences. The willingness to interact with other cultures is also one of the factors that influence individuals’ acceptance of technology in education. These results, derived through a scientific, impartial, and neutral process, can serve as a reference and a starting point for the Ministry of Higher Education, which aims to make human resources a driver of performance for public universities.
Tőnis Lukas, Tartu toomhärrad 1224-1558
Creators: name: Mühlen, Heinz Von Zur
Publisher: name: Zeitschrift für Ostmitteleuropa-Forschung
Year: 2001

description: Zeitschrift für Ostmitteleuropa-Forschung, Bd. 50 Nr. 4 (2001)
L’ottimismo all’italiana ossia il “Candido” nel XXI secolo
Creators: name: Kobylska, Dominika
Publisher: name: Wydawnictwo Uniwersytetu Jana Kochanowskiego w Kielcach
Year: 2022

description: Lo scopo dell’articolo è quello di presentare i risultati dell’analisi di Candido. Soap opera musical, pièce teatrale del 2004 creata da due artisti italiani – Aldo Nove e Andrea Liberovici – ispirati dal Candide di Voltaire del 1759. L’autrice di questo articolo cerca di evidenziare i punti comuni che collegano il Candido contemporaneo con il Candide del XVIII secolo e risponde alle seguenti domande di ricerca: Se gli autori italiani continuano il pensiero volteriano a proposito delle teorie di Leibnitz o piuttosto mostrano le sue incongruenze? Quali valori attuali fino a oggi si possono trovare nel Candido italiano? Lo studio è basato sulla teoria leibniziana sul “miglior dei mondi possibili” insieme all’interpretazione di essa effettuata da Ortega y Gasset e sulle teorie riguardo alla società dei consumi di Jean Baudrillard.
Delayed hypersensitivity reaction to allopurinol: A case report
Creators: name: Che Man, Mohammad
name: Che Alhadi, Shahidah
name: Wan Mahmud, Wan Fatimah Suriyani
name: Amirruddin, Salman
name: Mohd Razib, Mohd Zhafri
name: Ismail, Rasimah
Publisher: name: Zenodo
Year: 2021
Subjects: Delayed hypersensitivity, allopurinol, rashes, xanthine oxidase inhibitor

description: Abstract  Allopurinol is the well-known first-line option for symptomatic hyperuricemia and gout treatment by its urate lowering properties. It is very cost effective for the management of chronic gout. The most common early side effect of allopurinol is skin rashes, diarrhea, and nausea. However, the dangerous complication of allopurinol that we are worried is Steven Johnson Syndrome that can cause severe morbidity and mortality. Delayed hypersensitivity of allopurinol ingestion is rare and need to be one of the differential diagnoses if patient presents with skin rashes with underlying gout on chronic allopurinol ingestion. This case highlights the importance of a high index of suspicion in at-risk person with skin rashes wiclmth underlying gout on long term allopurinol as to avoid unnecessary management to the patient.