cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Wp 2: Acceptance Of Dual Citizenship: Empirical Data And Political Contexts
Creators: name: Blatter, Joachim K.
name: Erdmann, Stefanie
name: Schwanke, Katja
Publisher: name: Zenodo
Year: 2009

description: Abstract/Summary

In this paper we present empirical data on the historical development, the current regulations and the political contexts of dual citizenship regulations in the world. With this focus on empirical data this report presents complementary information in respect to the first results of our research project. In the paper “Dual citizenship and democracy” Joachim Blatter (2008) discussed the normative implications of dual citizenship on the basis of six theories of democracy.

The first part contains an overview on existing surveys on dual citizenship. These surveys indicate that the acceptance of dual citizenship by countries has been rising strongly since Second World War. At the beginning of the 21st Century, from 189 analyzed countries, 87 show a rather positive stance toward dual citizenship and 77 a rather negative one. For 25 countries, the existing surveys do not provide consistent results.

In the second part of the paper, we present the findings of our own expert survey in which we collected more differentiated information about the contexts, salience, goals and specifics of dual citizenship regulation for 35 countries. Our data reveals the high political salience of citizenship regulations in many countries and the fact that the acceptance of dual citizenship is often a very controversial aspect of citizenship reforms. In line with the data in the first part of the paper, our data shows a steady trend towards broader acceptance of dual citizenship. Furthermore, we discover a trend towards more symmetric regulations of dual citizenship insofar that emigrants and immigrants are treated similar. Although this is mainly due to the fact that dual citizenship is facilitated for emigrants we do not interpret this as a reethnicization of citizenship but as a trend towards an expansive and non-exclusive notion of citizenship. Contrary to many normative theorists, most countries do not apply any restrictions for dual citizens in respect to political participation and in respect to taking political offices. Finally, our data does not confirm any “securitiza-tion” discourses. Both, the traditional/conservative fear that dual citizens might produce military or diplomatic conflicts between states and the liberal/critical warning that dual citizenship might be used for expelling and denationalizing migrants, which are perceived as threats to the host society, have proven unwarranted (so far).
description: + Sprache: eng
When to be critical? Performance and evolvability in different regimes of neural Ising agents
Creators: name: Khajehabdollahi, Sina
name: Prosi, Jan
name: Giannakakis, Emmanouil
name: Martius, Georg
name: Levina, Anna
Publisher: name: arXiv
Year: 2023
Subjects: subject: Neural and Evolutionary Computing (cs.NE)
subject: FOS: Computer and information sciences

description: It has long been hypothesized that operating close to the critical state is beneficial for natural, artificial and their evolutionary systems. We put this hypothesis to test in a system of evolving foraging agents controlled by neural networks that can adapt agents' dynamical regime throughout evolution. Surprisingly, we find that all populations that discover solutions, evolve to be subcritical. By a resilience analysis, we find that there are still benefits of starting the evolution in the critical regime. Namely, initially critical agents maintain their fitness level under environmental changes (for example, in the lifespan) and degrade gracefully when their genome is perturbed. At the same time, initially subcritical agents, even when evolved to the same fitness, are often inadequate to withstand the changes in the lifespan and degrade catastrophically with genetic perturbations. Furthermore, we find the optimal distance to criticality depends on the task complexity. To test it we introduce a hard and simple task: for the hard task, agents evolve closer to criticality whereas more subcritical solutions are found for the simple task. We verify that our results are independent of the selected evolutionary mechanisms by testing them on two principally different approaches: a genetic algorithm and an evolutionary strategy. In summary, our study suggests that although optimal behaviour in the simple task is obtained in a subcritical regime, initializing near criticality is important to be efficient at finding optimal solutions for new tasks of unknown complexity.
description: arXiv admin note: substantial text overlap with arXiv:2103.12184
A Comprehensive and Versatile Multimodal Deep Learning Approach for Predicting Diverse Properties of Advanced Materials
Creators: name: Muroga, Shun
name: Miki, Yasuaki
name: Hata, Kenji
Publisher: name: arXiv
Year: 2023
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Artificial Intelligence (cs.AI)
subject: Machine Learning (cs.LG)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: We present a multimodal deep learning (MDL) framework for predicting physical properties of a 10-dimensional acrylic polymer composite material by merging physical attributes and chemical data. Our MDL model comprises four modules, including three generative deep learning models for material structure characterization and a fourth model for property prediction. Our approach handles an 18-dimensional complexity, with 10 compositional inputs and 8 property outputs, successfully predicting 913,680 property data points across 114,210 composition conditions. This level of complexity is unprecedented in computational materials science, particularly for materials with undefined structures. We propose a framework to analyze the high-dimensional information space for inverse material design, demonstrating flexibility and adaptability to various materials and scales, provided sufficient data is available. This study advances future research on different materials and the development of more sophisticated models, drawing us closer to the ultimate goal of predicting all properties of all materials.
description: 38 pages, 17 figures, 1 table
Phase transitions in the time synchronization model
Creators: name: Malyshev, Vadim
name: Manita, Anatoly
Publisher: name: arXiv
Year: 2012
Subjects: subject: Mathematical Physics (math-ph)
subject: Probability (math.PR)
subject: FOS: Physical sciences
subject: FOS: Mathematics
subject: 60K35, 60J27, 60F99

description: We continue the study of the time synchronization model from arXiv:1201.2141 . There are two types $i=1,2$ of particles on the line $R$, with $N_{i}$ particles of type $i$. Each particle of type $i$ moves with constant velocity $v_{i}$. Moreover, any particle of type $i=1,2$ jumps to any particle of type $j=1,2$ with rates $N_{j}^{-1}α_{ij}$. We find phase transitions in the clusterization (synchronization) behaviour of this system of particles on different time scales $t=t(N)$ relative to $N=N_{1}+N_{2}$.
description: 10 pages; first published in Theory Probab. Appl. 50, pp. 134-141 (2006); small corrections in text of the paper; bibliography updates
Organizational climate and job satisfaction for employees who remain after downsizing
Creators: name: Ross, Michael S.
Publisher: name: University of Calgary
Year: 1986
Subjects: subject: HD 58.7 R66 1987
subject: Organizational change
subject: Job satisfaction
subject: Job stress
subject: Burn out (Psychology)
subject: Employee morale
subject: Corporate culture

description: Bibliography: p. 155-168.
PIFSC report on the American Samoa limited-access longline fishery from 1 January to 31 December 2015
Creators: name: Pacific Islands Fisheries Science Center (U.S.) Fisheries Research And Monitoring Division
Publisher: name: U.S. Department of Commerce, National Oceanic and Atmospheric Administration, National Marine Fisheries Service, Pacific Islands Fisheries Science Center
Year: 2016
Subjects: subject: Longlining (Fisheries)--Catch effort--American Samoa--Observations.

description: The following tables represent effort, retained catch (kept) and discards as reported on longline logsheets for the American Samoa limited-access longline fishery. The following figures represent quarterly data for effort, catch (kept) and catch-per-unit-effort (CPUE) from 1997 to 2015. Effort and catch effort statistics are based on date of longline haul. Effort and catch statistics are based on logbook data submitted to the PIFSC, FRMD and represent an Oracle table LLDS_REPORT_STATS_AS database extraction done on February 29, 2016.
On the location of poles for the Ablowitz-Segur family of solutions to the second Painlevé equation
Creators: name: Bertola, Marco
Publisher: name: arXiv
Year: 2012
Subjects: subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: Classical Analysis and ODEs (math.CA)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: Using a simple operator-norm estimate we show that the solution to the second Painlevé equation within the Ablowitz-Segur family is pole-free in a well defined region of the complex plane of the independent variable. The result is illustrated with several numerical examples.
description: 8 pages, to appear in Nonlinearity
A Candidate Dual AGN at z=1.175
Creators: name: Barrows, R. Scott
name: Stern, Daniel
name: Madsen, Kristin
name: Harrison, Fiona
name: Assef, Roberto J.
name: Comerford, Julia M.
name: Cushing, Michael C.
name: Fassnacht, Christopher D.
name: Gonzalez, Anthony
name: Griffith, Roger
name: Hickox, Ryan
name: Kirkpatrick, J. Davy
name: Lagattuta, David J.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: The X-ray source CXOXBJ142607.6+353351 (CXOJ1426+35), which was identified in a 172 ks Chandra image in the Bootes field, shows double-peaked rest-frame optical/UV emission lines, separated by 0.69" (5.5 kpc) in the spatial dimension and by 690 km s^-1 in the velocity dimension. The high excitation lines and emission line ratios indicate both systems are ionized by an AGN continuum, and the double-peaked profile resembles that of candidate dual AGN. At a redshift of z=1.175, this source is the highest redshift candidate dual AGN yet identified. However, many sources have similar emission line profiles for which other interpretations are favored. We have analyzed the substantial archival data available in this field, as well as acquired near-infrared (NIR) adaptive optics (AO) imaging and NIR slit spectroscopy. The X-ray spectrum is hard, implying a column density of several 10^23 cm^-2. Though heavily obscured, the source is also one of the brightest in the field, with an absorption-corrected 2-10 keV luminosity of ~10^45 erg s^-1. Outflows driven by an accretion disk may produce the double-peaked lines if the central engine accretes near the Eddington limit. However, we may be seeing the narrow line regions of two AGN following a galactic merger. While the AO image reveals only a single source, a second AGN would easily be obscured by the significant extinction inferred from the X-ray data. Understanding the physical processes producing the complex emission line profiles seen in CXOJ1426+35 and related sources is important for interpreting the growing population of dual AGN candidates.
description: 18 pages and 9 figures. Accepted for publication in The Astrophysical Journal
The effect of O2 impurities on the low temperature radial thermal expansion of bundles of closed single-walled carbon nanotubes
Creators: name: Dolbin, A. V.
name: Esel'son, V. B.
name: Gavrilko, V. G.
name: Manzhelii, V. G.
name: Popov, S. N.
name: Vinnikov, N. A.
name: Sundqvist, B.
name: .
Publisher: name: arXiv
Year: 2011
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The effect of oxygen impurities upon the radial thermal expansion (ar) of bundles of closed single-walled carbon nanotubes has been investigated in the temperature interval 2.2-48 K by the dilatometric method. Saturation of bundles of nanotubes with oxygen caused an increase in the positive ar-values in the whole interval of temperatures used. Also, several peaks appeared in the temperature dependence ar(T) above 20 K. The low temperature desorption of oxygen from powders consisting of bundles of single-walled nanotubes with open and closed ends has been investigated
description: 7 pages, 3 figures
Ring, ring, ring… Are you dreaming? Combining acoustic stimulation and reality testing for lucid dream induction: A sleep laboratory study
Creators: name: Erlacher, Daniel
name: Schmid, Daniel
name: Bischof, Florian
name: Hammer, Jennifer
name: Stumbrys, Tadas
Publisher: name: International Journal of Dream Research
Year: 2020

description: Lucid dreaming, the fact that one knows that they are dreaming while dreaming, provides a unique paradigm for the study of the distinctive psychophysiological state of dreaming and consciousness. Unfortunately, frequent lucid dreamers are rare and techniques should be established to reliably induce lucid dreams. Here the induction of lucid dreams with a combination of reality testing and the external auditory stimulation with ring tones was applied. The procedure induced a self-rated lucid dream in five participants compared to one lucid dream in a sham condition. In two cases (16.7%) a signal-verified lucid dream was found. The induction rate of the present study procedure will be discussed in the context of previous studies and success rates of combining reality checking with external stimulation.
description: International Journal of Dream Research, Vol 13, No 2 (October 2020)
Frequency-redshift relation of the Cosmic Microwave Background
Creators: name: Hofmann, Ralf
name: Meinert, Janning
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We point out that a modified temperature-redshift relation ($T$-$z$ relation) of the cosmic microwave background (CMB) can not be deduced by any observational method that appeals to an a priori thermalisation to the CMB temperature $T$ of the excited states in a probe environment of independently determined redshift $z$. For example, this applies to quasar-light absorption by a damped Lyman-alpha system due to atomic as well as ionic fine-splitting transitions or molecular rotational bands. Similarly, the thermal Sunyaev-Zel'dovich (thSZ) effect cannot be used to extract the CMB's $T$-$z$ relation. This is because the relative line strengths between ground and excited states in the former and the CMB spectral distortion in the latter case both depend, apart from environment specific normalisations, solely on the dimensionless spectral variable $x=\frac{hν}{k_B T}$. Since literature on extractions of the CMB's $T$-$z$ relation always assumes (i) $ν(z)=(1+z)ν(z=0)$ where $ν(z=0)$ is the observed frequency in the heliocentric rest frame, the finding (ii) $T(z)=(1+z)T(z=0)$ just confirms the expected blackbody nature of the interacting CMB at $z>0$. In contrast to emission of isolated, directed radiation, whose frequency-redshift relation ($ν$-$z$ relation) is subject to (i), a non-conventional $ν$-$z$ relation $ν(z)=f(z)ν(z=0)$ of pure, isotropic blackbody radiation, subject to adiabatically slow cosmic expansion, necessarily has to follow that of the $T$-$z$ relation $T(z)=f(z)T(z=0)$ and vice versa. In general, the function $f(z)$ is determined by energy conservation of the CMB fluid in a Friedmann-Lemaitre-Robertson-Walker universe. If the pure CMB is subject to an SU(2) rather than a U(1) gauge principle, then $f(z)= \left({1/4}\right)^{1/3}(1+z)$ for $z\gg 1$, and $f(z)$ is nonlinear for $z\sim 1$.
description: 8 pages, 2 figures
Ignaz-Günther-Ausstellung in München
Creators: name: Thoma, Hans
Publisher: name: Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege
Year: 2020

description: Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege, Bd. 4 Nr. 9 (1951): Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege
Wp 4: Patents, Power, And Rhetoric: Intellectual Property Rights And The Politics Of Regime Complexity
Creators: name: Baumgärtner, Heiko
Publisher: name: Zenodo
Year: 2011

description: Abstract

The contemporary governance of intellectual property rights (IPRs) is an important illustration of how dense regime complexity shapes international politics. In particular, it enables a strategy of “forum shifting,” whereby states, NGOs, and multinational companies move issues and agendas to those venues that are most closely aligned with their interests and priorities. This article looks into the multifaceted nature of these dynamics by analyzing the “North-South” politics of two of the most critical areas of IP intersection – patents on medi-cines, and IPRs in biogenetic resources and associated traditional knowledge.

I shall argue that developing countries have “prevailed” in each of these conflicts not by securing rules that they desire, but by preserving more policy space for implementing IPRs than the U.S. and the European Communities were willing to concede. This finding poses a puzzle for realism – the most pertinent and developed approach on regime complexity. I therefore advance an argument that combines a focus on the institutional setup of regime complexes with ideational variables derived from a frame-analytic perspective. Such an approach reveals how developing countries and supportive NGOs raised the legi-timacy costs of acting on a maximalist IP agenda by deploying rules and rhetoric developed in more hospitable institutional settings, such as the CBD (Convention on Biological Diversity), the WHO (World Health Organization) and various U.N. human rights bodies.
description: + Sprache: eng
Non-Pauli errors can be efficiently sampled in qudit surface codes
Creators: name: Ma, Yue
name: Hanks, Michael
name: Kim, M. S.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Surface codes are the most promising candidates for fault-tolerant quantum computation. Single qudit errors are typically modelled as Pauli operators, to which general errors are converted via randomizing methods. In this Letter, we quantify remaining correlations after syndrome measurement for a qudit 2D surface code subject to non-Pauli errors. Using belief propagation and percolation theory, we relate correlations to loops on the lattice. Below the error correction threshold, remaining correlations are sparse and locally constrained. Syndromes for qudit surface codes are therefore efficiently samplable for non-Pauli errors, independent of the exact forms of the error and decoder.
description: Main text 6 pages, 4 figures, Supplemental Material 6 pages, 7 figures
[Rezension zu:] Petr Roubal, Spartakiads. The Politics of Physical Culture in Communist Czechoslovakia, Praha: Karolinum Press, 2019
Creators: name: Wiederkehr, Stefan
Publisher: name: Franz Steiner Verlag
Year: 2022
Subjects: subject: 796 Sportarten, Sportspiele
subject: Spartakiade

description: In: Jahrbücher für Geschichte Osteuropas / jgo.e-reviews, JGO 70 (2022), 1-2, S. 327-329
Scaling Laws in Human Language
Creators: name: Lu, Linyuan
name: Zhang, Zi-Ke
name: Zhou, Tao
Publisher: name: arXiv
Year: 2012
Subjects: subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: Information Retrieval (cs.IR)
subject: Physics and Society (physics.soc-ph)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: Zipf's law on word frequency is observed in English, French, Spanish, Italian, and so on, yet it does not hold for Chinese, Japanese or Korean characters. A model for writing process is proposed to explain the above difference, which takes into account the effects of finite vocabulary size. Experiments, simulations and analytical solution agree well with each other. The results show that the frequency distribution follows a power law with exponent being equal to 1, at which the corresponding Zipf's exponent diverges. Actually, the distribution obeys exponential form in the Zipf's plot. Deviating from the Heaps' law, the number of distinct words grows with the text length in three stages: It grows linearly in the beginning, then turns to a logarithmical form, and eventually saturates. This work refines previous understanding about Zipf's law and Heaps' law in language systems.
description: 6 pages, 4 figures
Optimal Goal-Reaching Reinforcement Learning via Quasimetric Learning
Creators: name: Wang, Tongzhou
name: Torralba, Antonio
name: Isola, Phillip
name: Zhang, Amy
Publisher: name: arXiv
Year: 2023
Subjects: subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: In goal-reaching reinforcement learning (RL), the optimal value function has a particular geometry, called quasimetric structure. This paper introduces Quasimetric Reinforcement Learning (QRL), a new RL method that utilizes quasimetric models to learn optimal value functions. Distinct from prior approaches, the QRL objective is specifically designed for quasimetrics, and provides strong theoretical recovery guarantees. Empirically, we conduct thorough analyses on a discretized MountainCar environment, identifying properties of QRL and its advantages over alternatives. On offline and online goal-reaching benchmarks, QRL also demonstrates improved sample efficiency and performance, across both state-based and image-based observations.
description: Project Page: https://www.tongzhouwang.info/quasimetric_rl/ Code: https://github.com/quasimetric-learning/quasimetric-rl/
Zuschrift an die Redaktion
Creators: name: Redaktion, Die
Publisher: name: Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege
Year: 2020

description: Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege, Bd. 10 Nr. 5 (1957): Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege
From Friedel oscillations and Kondo effect to the pseudogap in cuprates
Creators: name: Alloul, Henri
Publisher: name: arXiv
Year: 2012
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: One of the great achievements performed by Jacques Friedel in France has been to promote experimental activities on the electronic properties in condensed matter physics, which has led him, among others, to be an active promoter of the up-rise of the "Laboratoire de Physique des Solides" (LPS). A selective presentation of some of the work achieved in my Nuclear Magnetic Resonance (NMR) group allows me to underline the importance of the initial choices done by J. Friedel for the LPS. I give here an updated review of the work done on Kondo effect in the 1970's which has allowed me to enlighten the real interest of the NMR probe as a local experimental technique to visualize the perturbation brought by impurities in normal metals. In a second part I summarize the early NMR experiments done in the high Tc cuprates which have given evidence for the existence of strong electronic correlations and established the occurrence of the "pseudogap", on which I have initially had some exchanges with J. Friedel. The pseudogap, occurring below a temperature T*, has during the last twenty years raised endless discussions about the incidence of correlations on superconductivity. Many researchers are still advocating today that the pseudogap is due to the existence of preformed pairs above Tc. Its robustness to impurities and disorder that we evidenced from the early days rather suggested that it results from a competing order of the correlated state. This is apparently better accepted nowadays, although various distinct ordered states detected below T* are not yet understood. I also underline the large contrast between the scientific behaviours which prevailed between these two periods of scientific activity. I suggest that these changes might have a negative incidence, in my opinion, on the research and education system, at least in our field of science.
description: 23 pages, 13 figures. Article dedicated to the 90th anniversary of J. Friedel
Effect of Off-Diagonal Elements in Wannier Hamiltonian on DFT+DMFT for low-symmetry material: Study of Li$_2$MnO$_3$
Creators: name: Lee, Alex Taekyung
name: Park, Hyowon
name: Ngo, Anh T.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We study the effect of the off-diagonal elements of the Wannier Hamiltonian on the electronic structure of low-symmetry material Li$_2$MnO$_3$ ($C2/m$), using dynamical mean field theory calculations with continuous-time Quantum Monte Carlo impurity solver. Presence of significant off-diagonal elements leads to a pronounced suppression of the energy gap. The off-diagonal elements are largest when the Wannier projection is used based on the global coordinate, and they remain substantial even with the projection using the local coordinate close to the direction of Mn-O bonds. We show that the energy gap is enhanced by the diagonalization of the Mn $d$ block in the full $p$-$d$ Hamiltonian, with applying unitary rotation matrix. Additionally, the inclusion of a small double counting energy is crucial for achieving the experimental gap by reducing $p$-$d$ hybridization. Furthermore, we establish the efficiency of a low-energy ($d$-only basis) model for studying the electronic structure of Li$_2$MnO$3$, as the Wannier basis represents a hybridized state of Mn $d$ and O $p$ orbitals. These findings suggest an appropriate new approach for investigating low-symmetry materials using the DFT+DMFT method. To the best of our knowledge, no systematic study of the effect of off-diagonal terms has been conducted thus far. We also find that the antiferromagnetic ground state $Γ_{2u}$ is stable with $U \leq 2$ eV within density functional theory+$U$ calculations, which is much smaller than widely used $U$=5 eV.
description: 13 pages, 10 figures
Robust Performance Analysis for Time-Varying Multi-Agent Systems with Stochastic Packet Loss
Creators: name: Hespe, Christian
name: Werner, Herbert
Publisher: name: arXiv
Year: 2023
Subjects: subject: Systems and Control (eess.SY)
subject: Optimization and Control (math.OC)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Mathematics

description: Recently, a scalable approach to system analysis and controller synthesis for homogeneous multi-agent systems with Bernoulli distributed packet loss has been proposed. As a key result of that line of work, it was shown how to obtain upper bounds on the $H_2$-norm that are robust with respect to uncertain interconnection topologies. The main contribution of the current paper is to show that the same upper bounds hold not only for uncertain but also time-varying topologies that are superimposed with the stochastic packet loss. Because the results are formulated in terms of linear matrix inequalities that are independent of the number of agents, multi-agent systems of any size can be analysed efficiently. The applicability of the approach is demonstrated on a numerical first-order consensus example, on which the obtained upper bounds are compared to estimates from Monte-Carlo simulations.
description: 8 pages, 4 figures. Extended version of a paper to be published at IFAC World Congress 2023
Tafeln
Creators: name: Redaktion, Die
Publisher: name: Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege
Year: 2020

description: Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege, Bd. 10 Nr. 6 (1957): Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege
Retinal adaptation and invariance to changes in higher-order stimulus statistics
Creators: name: Tkačik, Gašper
name: Ghosh, Anandamohan
name: Schneidman, Elad
name: Segev, Ronen
Publisher: name: arXiv
Year: 2012
Subjects: subject: Neurons and Cognition (q-bio.NC)
subject: FOS: Biological sciences

description: Adaptation in the retina is thought to optimize the encoding of natural light signals into sequences of spikes sent to the brain. However, adaptation also entails computational costs: adaptive code is intrinsically ambiguous, because output symbols cannot be trivially mapped back to the stimuli without the knowledge of the adaptive state of the encoding neuron. It is thus important to learn which statistical changes in the input do, and which do not, invoke adaptive responses, and ask about the reasons for potential limits to adaptation. We measured the ganglion cell responses in the tiger salamander retina to controlled changes in the second (contrast), third (skew) and fourth (kurtosis) moments of the light intensity distribution of spatially uniform temporally independent stimuli. The skew and kurtosis of the stimuli were chosen to cover the range observed in natural scenes. We quantified adaptation in ganglion cells by studying two-dimensional linear-nonlinear models that capture well the retinal encoding properties across all stimuli. We found that the retinal ganglion cells adapt to contrast, but exhibit remarkably invariant behavior to changes in higher-order statistics. Finally, by theoretically analyzing optimal coding in LN-type models, we showed that the neural code can maintain a high information rate without dynamic adaptation despite changes in stimulus skew and kurtosis.
Carl Gustaf Stridbeck, Bruegelstudien. Untersuchungen zu den ikonologischen Problemen bei Pieter Bruegel d. Ä. sowie dessen Beziehungen zum niederländischen Romanismus - Franzsepp Würtenberger, Pieter Bruegel d. Ä. und die deutsche Kunst
Creators: name: Bauer, Hermann
Publisher: name: Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege
Year: 2020

description: Rezension zu: Carl Gustaf Stridbeck, Bruegelstudien. Untersuchungen zu den ikonologischen Problemen bei Pieter Bruegel d. Ä. sowie dessen Beziehungen zum niederländischen Romanismus. Bd. II der Acta Universitatis Stockholmiensis. Almquist & Wiksell, Stockholm 1956. 379 S., 69 Bildseiten. Broschiert DM 38.50. Franzsepp Würtenberger, Pieter Bruegel d. Ä. und die deutsche Kunst. 172 S., 71 Abb. Franz Steiner Verlag, Wiesbaden, 1957. Preis DM 24.-.
description: Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege, Bd. 10 Nr. 8 (1957): Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege
What is consciousness like for a conscious being?
Creators: name: Lee, Roberta A. (Roberta Ann), 1947-
Publisher: name: University of Calgary
Year: 1984
Subjects: subject: BD 450 L42 1986
subject: Self (Philosophy)
subject: Consciousness

description: Bibliography: p. 172-174.
description: The thesis is concerned with consciousness. The suggested approach is phenomenological but the implied methodology is complicated and of necessity devious. It is a matter for display, examples rather than demonstrations or proof. The subject (the 'I', not talk of 'I') must admit of access but various approaches have their difficulties. Initially I argue that the notion of access to the subject is explored by invoking the category of experience. In this context I appeal, albeit in subordinate fashion, to standard idiom. The experiential "phenomenal" is introduced by contrasting the views of Nagel and Dennett. Inclining to the philosophical motives of the former, I attempt to characterize experience in terms of what it is like to be a subject. I cite the well-worn but ill-used topic of dreams to highlight the issue of the connection between being conscious and being awake. In order that I clarify what is essential to consciousness, in my analysis of the conscious state I try, in opposition to Ryle, to show that his talk of episodes and dispositions will not bear the theoretic burden. The central portion of my thesis is devoted to displaying where the Rylean categories fail and why what I characterize as "middleground" is essential. I give in this regard a rendition of concentrating (heeding, caring, attending, inter alia) which is intended to people a Rylean wasteland with subjects knowing themselves in situations as themselves as presented to themselves. Finally, I stated the possibilities for reflexive consciousness -- the being for a subject to a subject -- in contexts relating both to phenomenology and fringe areas of psychology.
Amino-acid-dependent main-chain torsion-energy terms for protein systems
Creators: name: Sakae, Yoshitake
name: Okamoto, Yuko
Publisher: name: arXiv
Year: 2012
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Biological Physics (physics.bio-ph)
subject: Biomolecules (q-bio.BM)
subject: FOS: Physical sciences
subject: FOS: Biological sciences

description: Many commonly used force fields for protein systems such as AMBER, CHARMM, GROMACS, OPLS, and ECEPP have amino-acid-independent force-field parameters of main-chain torsion-energy terms. Here, we propose a new type of amino-acid-dependent torsion-energy terms in the force fields. As an example, we applied this approach to AMBER ff03 force field and determined new amino-acid-dependent parameters for $ψ$ and $ψ'$ angles for each amino acid by using our optimization method, which is one of the knowledge-based approach. In order to test the validity of the new force-field parameters, we then performed folding simulations of $α$-helical and $β$-hairpin peptides, using the optimized force field. The results showed that the new force-field parameters gave structures more consistent with the experimental implications than the original AMBER ff03 force field.
description: 10 pages, (Revtex4.1), 3 tables, 6 figures
NMR shift prediction from small data quantities
Creators: name: Rull, Herman
name: Fischer, Markus
name: Kuhn, Stefan
Publisher: name: arXiv
Year: 2023
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: Machine Learning (cs.LG)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences
subject: 92

description: Prediction of chemical shift in NMR using machine learning methods is typically done with the maximum amount of data available to achieve the best results. In some cases, such large amounts of data are not available, e.g. for heteronuclei. We demonstrate a novel machine learning model which is able to achieve good results with comparatively low amounts of data. We show this by predicting 19F and 13C NMR chemical shifts of small molecules in specific solvents.
description: 11 pages, 5 figures, 6 tables
Entscheidende Wandfragmente: Untersuchungen zum Inhalt von Amphoren aus Köln und Bonn
Creators: name: Höpken, Constanze
Publisher: name: Archäologisches Korrespondenzblatt
Year: 2020

description: Archäologisches Korrespondenzblatt, Bd. 46 Nr. 1 (2016): Archäologisches Korrespondenzblatt
mcLARO: Multi-Contrast Learned Acquisition and Reconstruction Optimization for simultaneous quantitative multi-parametric mapping
Creators: name: Zhang, Jinwei
name: Nguyen, Thanh D.
name: Solomon, Eddy
name: Li, Chao
name: Zhang, Qihao
name: Li, Jiahao
name: Zhang, Hang
name: Spincemaille, Pascal
name: Wang, Yi
Publisher: name: arXiv
Year: 2023
Subjects: subject: Image and Video Processing (eess.IV)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Purpose: To develop a method for rapid sub-millimeter T1, T2, T2* and QSM mapping in a single scan using multi-contrast Learned Acquisition and Reconstruction Optimization (mcLARO). Methods: A pulse sequence was developed by interleaving inversion recovery and T2 magnetization preparations and single-echo and multi-echo gradient echo acquisitions, which sensitized k-space data to T1, T2, T2* and magnetic susceptibility. The proposed mcLARO used a deep learning framework to optimize both the multi-contrast k-space under-sampling pattern and the image reconstruction based on image feature fusion. The proposed mcLARO method with R=8 under-sampling was validated in a retrospective ablation study using fully sampled data as reference and evaluated in a prospective study using separately acquired conventionally sampled quantitative maps as reference standard. Results: The retrospective ablation study showed improved image sharpness of mcLARO compared to the baseline network without multi-contrast sampling pattern optimization or image feature fusion, and negligible bias and narrow 95% limits of agreement on regional T1, T2, T2* and QSM values were obtained by the under-sampled reconstructions compared to the fully sampled reconstruction. The prospective study showed small or negligible bias and narrow 95% limits of agreement on regional T1, T2, T2* and QSM values by mcLARO (5:39 mins) compared to reference scans (40:03 mins in total). Conclusion: mcLARO enabled fast sub-millimeter T1, T2, T2* and QSM mapping in a single scan.
Affine metrics and algebroid structures: Application to general relativity and unification
Creators: name: Elyasi, N.
name: Boroojerdian, N.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences
subject: 81V22.83E15

description: Affine metrics and its associated algebroid bundle are developed. Theses structures are applied to the general relativity and provide an structure for unification of gravity and electromagnetism. The final result is a field equation on the associated algebroid bundle that is similar to Einstein field equation but contain Einstein field equation and Maxwell equations simultaneously and contain a new equation that may have new results.
Robust data-driven control for nonlinear systems using the Koopman operator
Creators: name: Strässer, Robin
name: Berberich, Julian
name: Allgöwer, Frank
Publisher: name: arXiv
Year: 2023
Subjects: subject: Systems and Control (eess.SY)
subject: Optimization and Control (math.OC)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Mathematics

description: Data-driven analysis and control of dynamical systems have gained a lot of interest in recent years. While the class of linear systems is well studied, theoretical results for nonlinear systems are still rare. In this paper, we present a data-driven controller design method for discrete-time control-affine nonlinear systems. Our approach relies on the Koopman operator, which is a linear but infinite-dimensional operator lifting the nonlinear system to a higher-dimensional space. Particularly, we derive a linear fractional representation of a lifted bilinear system representation based on measured data. Further, we restrict the lifting to finite dimensions, but account for the truncation error using a finite-gain argument. We derive a linear matrix inequality based design procedure to guarantee robust local stability for the resulting bilinear system for all error terms satisfying the finite-gain bound and, thus, also for the underlying nonlinear system. Finally, we apply the developed design method to the nonlinear Van der Pol oscillator.
description: Accepted for presentation at the IFAC World Congress 2023
Measuring Invisible Particle Masses Using a Single Short Decay Chain
Creators: name: Cheng, Hsin-Chia
name: Gu, Jiayin
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We consider the mass measurement at hadron colliders for a decay chain of two steps, which ends with a missing particle. Such a topology appears as a subprocess of signal events of many new physics models which contain a dark matter candidate. From the two visible particles coming from the decay chain, only one invariant mass combination can be formed and hence it is naïvely expected that the masses of the three invisible particles in the decay chain cannot be determined from a single end point of the invariant mass distribution. We show that the event distribution in the $\log(E_{1T}/E_{2T})$ vs. invariant mass-squared plane, where $E_{1T}$, $E_{2T}$ are the transverse energies of the two visible particles, contains the information of all three invisible particle masses and allows them to be extracted individually. The experimental smearing and combinatorial issues pose challenges to the mass measurements. However, in many cases the three invisible particle masses in the decay chain can be determined with reasonable accuracies.
description: 45 pages, 32 figures
Time-domain observation of interlayer exciton formation and thermalization in a MoSe$_2$/WSe$_2$ heterostructure
Creators: name: Policht, Veronica R.
name: Mittenzwey, Henry
name: Dogadov, Oleg
name: Katzer, Manuel
name: Villa, Andrea
name: Li, Qiuyang
name: Kaiser, Benjamin
name: Ross, Aaron M.
name: Scotognella, Francesco
name: Zhu, Xiaoyang
name: Knorr, Andreas
name: Selig, Malte
name: Cerullo, Giulio
name: Conte, Stefano Dal
Publisher: name: arXiv
Year: 2023
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Vertical heterostructures (HS) of transition metal dichalcogenides (TMDs) host interlayer excitons (ILX), with electrons and holes residing in different layers. With respect to their intralayer counterparts, ILX feature much longer lifetimes and diffusion lengths, paving the way to excitonic optoelectronic devices operating at room temperature. While the recombination dynamics of ILX has been intensively studied, the formation process and its underlying physical mechanisms are still largely unexplored. Here we use ultrafast transient absorption spectroscopy with a white-light probe, spanning both intralayer and interlayer exciton resonances, to simultaneously capture and time-resolve interlayer charge transfer and ILX formation dynamics in a MoSe$_2$/WSe$_2$ HS. We find that the ILX formation timescale is nearly an order of magnitude (~1 ps) longer than the interlayer charge transfer time (~100 fs). Microscopic calculations attribute the relative delay to an interplay between a phonon-assisted interlayer exciton cascade and subsequent cooling processes, and excitonic wave-function overlap. Our results provide an explanation to the efficient photocurrent generation observed in optoelectronic devices based on TMD HS, as the ILX have an opportunity to dissociate during their thermalization process.
description: 18 pages, 4 figures
Controlled Production of Sub-Radiant States of a Diatomic Molecule in an Optical Lattice
Creators: name: Takasu, Yosuke
name: Saito, Yutaka
name: Takahashi, Yoshiro
name: Borkowski, Mateusz
name: Ciuryło, Roman
name: Julienne, Paul S.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: We report successful production of sub-radiant states of a two-atom system in a three-dimensional optical lattice starting from doubly occupied sites in a Mott insulator phase of a quantum gas of atomic ytterbium. We can selectively produce either sub-radiant 1g state or super-radiant 0u state by choosing the excitation laser frequency. The inherent weak excitation rate for the sub-radiant 1g state is overcome by the increased atomic density due to the tight-confinement in a three-dimensional optical lattice. Our experimental measurements of binding energies, linewidth, and Zeeman shift confirm observation of sub-radiant levels of the 1g state of the Yb_2 molecule.
description: To be published in Phys. Rev. Lett
title: Σύγκριση τoυ ανθρακικoύ απoτυπώματoς ενός κτιρίoυ γραφείων στην περιoχή της Αθήνας, βασιζόμενoι στις αρχές τoυ Κ.ΕΝ.Α.Κ. και στo πρότυπo τoυ παθητικoύ κτιρίoυ μέσω της ανάλυσης κύκλoυ ζωής
titleType: AlternativeTitle
title: Comparison of the Carbon Footprint of an Office Building in the Athens Area, based on the principles of KENAK and the Passive House Standard through Life Cycle Assessment
Creators: name: Koreli, Georgia
Publisher: name: National Technological University of Athens
Year: 2025
Subjects: Παθητικό κτίριο
Passive House
Ανθρακικό αποτύπωμα
Εξοικονόμηση ενέργειας

description: Εθνικό Μετσόβιο Πολυτεχνείο--Μεταπτυχιακή Εργασία. Διεπιστημονικό-Διατμηματικό Πρόγραμμα Μεταπτυχιακών Σπουδών (Δ.Π.Μ.Σ.) “Αρχιτεκτονική –Σχεδιασμός του Χώρου”
Thermodynamics of spin chains of Haldane-Shastry type and one-dimensional vertex models
Creators: name: Enciso, A.
name: Finkel, F.
name: Gonzalez-Lopez, A.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Mathematical Physics (math-ph)
subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Physical sciences

description: We study the thermodynamic properties of spin chains of Haldane-Shastry type associated with the A_{N-1} root system in the presence of a uniform external magnetic field. To this end, we exactly compute the partition function of these models for an arbitrary finite number of spins. We then show that these chains are equivalent to a suitable inhomogeneous classical Ising model in a spatially dependent magnetic field, generalizing the results of Basu-Mallick et al. for thezero magnetic field case. Using the standard transfer matrix approach, we are able to compute in closed form the free energy per site in the thermodynamic limit. We perform a detailed analysis of the chains' thermodynamics in a unified way, with special emphasis on the zero field and zero temperature limits. Finally, we provide a novel interpretation of the thermodynamic quantities of spin chains of Haldane-Shastry type as weighted averages of the analogous quantities over an ensemble of classical Ising models.
description: LaTeX, 39 pages, 13 figures
Many-body radiative heat transfer theory
Creators: name: Ben-Abdallah, Philippe
name: Biehs, Svend-Age
name: Joulain, Karl
Publisher: name: arXiv
Year: 2011
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: In this Letter a N-body theory for the radiative heat exchange in thermally non equilibrated discrete systems of finite size objects is presented. We report strong exaltation effects of heat flux which can be explained only by taking into account the presence of many body interactions. Our theory extends the standard Polder and van Hove stochastic formalism used to evaluate heat exchanges between two objects isolated from their environment to a collection of objects in mutual interaction. It gives a natural theoretical framework to investigate the photon heat transport properties of complex systems at mesoscopic scale.