cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Duality for outer $L^p_μ(\ell^r)$ spaces and relation to tent spaces
Creators: name: Fraccaroli, Marco
Publisher: name: arXiv
Year: 2020
Subjects: subject: Classical Analysis and ODEs (math.CA)
subject: Functional Analysis (math.FA)
subject: FOS: Mathematics
subject: 42B35, 46E30

description: We prove that the outer $L^p_μ(\ell^r)$ spaces, introduced by Do and Thiele, are isomorphic to Banach spaces, and we show the expected duality properties between them for $1 < p \leq \infty, 1 \leq r < \infty$ or $p=r \in \{ 1, \infty \}$ uniformly in the finite setting. In the case $p=1, 1 < r \leq \infty$, we exhibit a counterexample to uniformity. We show that in the upper half space setting these properties hold true in the full range $1 \leq p,r \leq \infty$. These results are obtained via greedy decompositions of functions in $L^p_μ(\ell^r)$. As a consequence, we establish the equivalence between the classical tent spaces $T^p_r$ and the outer $L^p_μ(\ell^r)$ spaces in the upper half space. Finally, we give a full classification of weak and strong type estimates for a class of embedding maps to the upper half space with a fractional scale factor for functions on $\mathbb{R}^d$.
description: 32 pages, 1 figure
All-optical Differential Radii in Zinc
Creators: name: Sahoo, B. K.
name: Ohayon, B.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: We conduct high-accuracy calculations of isotope shift (IS) factors of the states involving the $D_1$ and $D_2$ lines in Zn II. Together with a global fit to the available optical IS data, we extract nuclear-model-independent, precise differential radii for a long chain of Zn isotopes. These radii are compared with the ones inferred from muonic X-ray measurements. Some deviations are found, which we ascribe to the deformed nature of Zn nuclei that introduces nuclear-model dependency into radii extractions from muonic atoms. We arrive at the conclusion that in cases where the many-body atomic calculations of IS factors are well-established, optical determinations of differential radii are more reliable than those extracted from the muonic X-ray measurements, opening the door to improved determination of nuclear radii across the nuclear chart.
Accessing the Impacts of Rural Infrastructure Investments on Household Farm Investment and Productivity – Case Study of Shrimp Aquaculture in Rural Vietnam Subtheme
Creators: name: Zheng, Lingfeng
name: Zheng, Lingfeng
Publisher: name: Unknown
Year: 2017
Subjects: subject: Public Economics
subject: rural infrastructure
subject: agricultural investment
subject: Shrimp aquaculture
subject: Vietnam

description: In developing countries, lack of critical infrastructure, such as roads, railways, ports, and power, is one of the major barriers to doing business and rural development. This research seeks to examine the complementarity between public infrastructure investment and farm investment, and their impacts on farmers’ productivity. Using the primarily collected data, the quantitative analysis reveals that households with better access to public infrastructure tend to invest with higher value on farm equipment. Canals are the most significant determinant on private farm investment for Vietnamese shrimp farmers, when compared to other types of public infrastructure. Households in remote area with inadequate access to infrastructure are found to have lower farm investment and hence lower productivity. However, when access to infrastructure reaches a peak level, farmers are likely to reduce their agricultural investment and shrift to non-farming sectors.
Supplementary Materials for “Long-tailed distributions of inter-event times as mixtures of exponential distributions”
Creators: name: Okada, Makoto
name: Yamanishi, Kenji
name: Masuda, Naoki
Publisher: name: The Royal Society
Year: 2020
Subjects: subject: Statistics
subject: FOS: Mathematics
subject: 20304 Thermodynamics and Statistical Physics
subject: FOS: Mechanical engineering

description: Inter-event times of various human behaviour are apparently non-Poissonian and obey long-tailed distributions as opposed to exponential distributions, which correspond to Poisson processes. It has been suggested that human individuals may switch between different states, in each of which they are regarded to generate events obeying a Poisson process. If this is the case, inter-event times should approximately obey a mixture of exponential distributions with different parameter values. In the present study, we introduce the minimum description length principle to compare mixtures of exponential distributions with different numbers of components (i.e. constituent exponential distributions). Because these distributions violate the identifiability property, one is mathematically not allowed to apply the Akaike or Bayes information criteria to their maximum-likelihood estimator to carry out model selection. We overcome this theoretical barrier by applying a minimum description principle to joint likelihoods of the data and latent variables. We show that mixtures of exponential distributions with a few components are selected, as opposed to more complex mixtures in various datasets, and that the fitting accuracy is comparable to that of state-of-the-art algorithms to fit power-law distributions to data. Our results lend support to Poissonian explanations of apparently non-Poissonian human behaviour.
Unified theory of vibrational spectra in amorphous materials
Creators: name: Baggioli, Matteo
name: Zaccone, Alessio
Publisher: name: arXiv
Year: 2019
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Soft Condensed Matter (cond-mat.soft)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: The phonon spectra of solids, described through the measurable vibrational density of states (VDOS), provide a wealth of information about the underlying atomic structure and bonding, and they determine fundamental macroscopic properties such as specific heat, thermal conductivity and superconductivity. In amorphous solids, structural disorder generates a number of poorly understood phenomena that are absent in crystals. Starting from an effective field theory description which accounts for disorder in terms of momentum diffusion, we provide a unified theoretical description of the VDOS of amorphous materials. The theory provides an excellent description of the simulated/experimental VDOS of two quite different materials (silica glass and amorphous Si) with very few non-trivial fitting parameters. In particular, the phonons speeds and diffusive linewidths obtained from the fits are fully consistent with the tabulated values from experiments. This semi-analytical approach solves the long-standing problem of describing and explaining the features of the VDOS and Raman spectra of amorphous solids in relation with the underlying acoustic dispersion relations and acoustic attenuation. Furthermore, it can be used in a reverse-engineered way to estimate phonon dispersion relations, acoustic attenuation and dynamic structure factors from a simple fitting of the VDOS with the presented model.
description: 5 pages, 4 figures
Agricultural Business Model and Sustainable Development in Highland: A Case of Nan, Thailand
Creators: name: Teerasuwannajak, Khemarat Talerngsri
name: Pongkijvorasin, Sittidaj
name: Teerasuwannajak, Khemarat Talerngsri
name: Pongkijvorasin, Sittidaj
Publisher: name: Unknown
Year: 2017
Subjects: subject: Agribusiness
subject: Agricultural business model
subject: highland agriculture
subject: sustainable agricultural system
subject: sustainable development

description: Over the past decade, forestsin the Northern Thailand have reducedrapidly. Farmers’ well-being and highland environment have also suffered vastly, owing to an expansion of maize farming. To induce farmers to adopt a more environmental friendly alternative, it is essential that policy makers must understand potential business models that could lend good support to highland agricultural system and bring forth sustainability. This paper studies constraints and advantages of existing highland business models in Nan. We consider impacts of engaging in various business models on farmers’ livelihood and environments. Data were gathered from 146 household-surveys in 7 areas of Nan and in-depth interviews with local stakeholders, government and development agencies. We show that different agricultural systems and business models fare different impacts on economic, social and environment. Contact farming reduces price uncertainty for farmers, but creates significant negative impacts on social and environment. Farmers’ aggregation help strengthen farmers’ capacity and open up market opportunity, but it does not guarantee a lift in bargaining power. Cultivating highquality product may add value to final product and benefit environment, yet farmers need to be linked to high-end market and pass quality guarantee system. Product processing helps diversifying market risk, but whether or not the value added will be returned to farmers is questionable. Developing business model for an area depends on several factors including readiness of community and requirements of each model. We assert the “four essential principles” that need to be embedded and nurtured in upland agricultural business. These are: 1) give high returns per unit area 2) reduce risk 3) strengthen farmers and community and 4) set explicit conditions to improve environment. We offer various means that business and farmers may choose to adopt so as to deliver results according to each principle.
title: A Stochastic Dynamic Foodweb model for the Barents Sea ecosystem
Creators: name: Lindstrøm, Ulf
name: Planque, Benjamin
name: Subbey, Samuel
Publisher: name: ASC 2012 - Theme session A
Year: 2024
Subjects: Ecosystem observation, processes and dynamics

description: No abstracts are to be cited without prior reference to the author.Developing marine ecosystem models is inherently difficult because of the diversity and complexity of ecological processes to account for, the presence of nonBlinearities, and the broad range of spatial and temporal scales to cover.
Astrophysical Thermonuclear Functions for Boltzmann-Gibbs Statistics and Tsallis Statistics
Creators: name: Saxena, R. K.
name: Mathai, A. M.
name: Haubold, H. J.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Mathematical Physics (math-ph)
subject: Classical Analysis and ODEs (math.CA)
subject: FOS: Physical sciences
subject: FOS: Mathematics
subject: 33C20 (Primary), 33C90 (Secondary)

description: We present an analytic proof of the integrals for astrophysical thermonuclear functions which are derived on the basis of Boltzmann-Gibbs statistical mechanics. Among the four different cases of astrophysical thermonuclear functions, those with a depleted high-energy tail and a cut-off at high energies find a natural interpretation in q-statistics.
description: 10 pages, LaTeX
USIA Poll # 1985-I85097: Pre-Geneva
Creators: name: USIA
Publisher: name: Roper Center for Public Opinion Research
Year: 2022

description: Approve/disapprove of government's record (1); satisfaction with Mrs. Thatcher (1); Mr. Kinnock is/is not doing proving to be a good Labour party leader (1); Mr. Steel is/is not proving to be a good Liberal party leader (1); Dr. Owen is/is not proving to be a good Liberal party leader (1); general elections (2); vote in June 1983 general elections (1); closeness to particular party (1); US-Soviet Union relations (1); confidence in the US/Soviet Union to deal responsibly with world problems (2); U.S./Soviet Union arms reduction agreement efforts (2); meeting between U.S. President Ronald Reagan/Soviet leader Mikhail Gorbachev in Geneva (6); anti-missile defense research (4); defensive weaponry in space (1); likeliness of US-Soviet Union agreement on nuclear arms reduction (1); descriptions of US President Reagan/Soviet leader Gorbachev (6).
Fourier decay of fractal measures on hyperboloids
Creators: name: Barron, Alex
name: Erdogan, M. Burak
name: Harris, Terence L. J.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Classical Analysis and ODEs (math.CA)
subject: FOS: Mathematics
subject: 42B37

description: Let $μ$ be an $α$-dimensional probability measure. We prove new upper and lower bounds on the decay rate of hyperbolic averages of the Fourier transform $\widehatμ$. More precisely, if $\mathbb{H}$ is a truncated hyperbolic paraboloid in $\mathbb{R}^d$ we study the optimal $β$ for which $$\int_{\mathbb{H}} |\hatμ(Rξ)|^2 \, d σ(ξ)\leq C(α, μ) R^{-β}$$ for all $R > 1$. Our estimates for $β$ depend on the minimum between the number of positive and negative principal curvatures of $\mathbb{H}$; if this number is as large as possible our estimates are sharp in all dimensions.
description: Final version, to appear in Transactions of the AMS
An Inflationary Model in String Theory
Creators: name: Iizuka, Norihiro
name: Trivedi, Sandip P.
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Astrophysics (astro-ph)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We construct a model of inflation in string theory after carefully taking into account moduli stabilization. The setting is a warped compactification of Type IIB string theory in the presence of D3 and anti-D3-branes. The inflaton is the position of a D3-brane in the internal space. By suitably adjusting fluxes and the location of symmetrically placed anti-D3-branes, we show that at a point of enhanced symmetry, the inflaton potential V can have a broad maximum, satisfying the condition V''/V << 1 in Planck units. On starting close to the top of this potential the slow-roll conditions can be met. Observational constraints impose significant restrictions. As a first pass we show that these can be satisfied and determine the important scales in the compactification to within an order of magnitude. One robust feature is that the scale of inflation is low, H = O(10^{10}) GeV. Removing the observational constraints makes it much easier to construct a slow-roll inflationary model. Generalizations and consequences including the possibility of eternal inflation are also discussed. A more careful study, including explicit constructions of the model in string theory, is left for the future.
description: 27 pages, LaTeX, 1 eps figure. v2: references added
Murchison 1841–English. The naming of the Permian System
Creators: name: Benton, Michael J.
name: Sennikov, Andrey G.
Publisher: name: Geological Society of London
Year: 2021
Subjects: subject: Geology
subject: FOS: Earth and related environmental sciences

description: English translation of Murchison, R.I. 1841d. A brief report on the geological journey across Russia in 1841. Letter from R. Murchison to His Excellency the Minister of Finance. Mining Journal, 4(11–12), 145–160.
title: Steel stakes to capture debris-wood on an impermeable Sabo-type dam
Creators: name: Harada, Norio
name: Satofuka, Yoshifumi
Publisher: name: Mountain Scholar
Year: 2019
Subjects: impermeable sabo-type dam
woody debris
experiment
steel stake
debris flow

description: It is important to capture driftwood, namely, woody debris, in upstream areas to prevent debris flows from blocking downstream bridges. Specific details of the conditions of dams in Japan must be taken into consideration when investigating this issue. There have been recent proposals to use steel stakes as countermeasures to woody debris blockage at impermeable Sabo-type dams. To design such a countermeasure effectively, it is necessary to clarify the woody debris capture mechanisms implemented by the countermeasure. We proposed a structure composed of steel stakes for use at impermeable Sabo-type dams. This proposal is based on experiments that take into consideration the rotation of woody debris at Sabo dams and the mechanism by which woody debris is captured at the stakes.
Irrigation Policies under Rapid Industrialization and Labor Migration: Lessons from Japan, China and India
Creators: name: Kajisa, Kei
name: Kajisa, Kei
Publisher: name: Unknown
Year: 2017
Subjects: subject: Land Economics/Use
subject: irrigation
subject: industrialization
subject: collective action

description: International society recognizes that the scarcity of fresh water is increasing and farming sectors suffer from lack of irrigation water. However, if we look at this issue with a framework of relative factor endowment, a different view will arise. In emerging states with rapid industrialization and labor migration, labor scarcity increases at a faster pace than that of irrigation water. Using the historical review of Japan’s irrigation policies as well as the case studies of India and China, this paper shows that the introduction of policies which do not reflect the actual relative resource scarcity may mislead the development path. We argue that under increasing relative labor scarcity it is important to realize the substitution of capital for labor for surface irrigation system management and that the substitution needs public support because the service of surface irrigation system has some externalities. Through this argument, this paper also intends to shed the light back to the role of the state for local resource management which seems to be unfairly undervalued since the boom of community participatory approach in the 1980s.
Modeling and analysis of pHRI with Differential Game Theory
Creators: name: Franceschi, Paolo
name: Beschi, Manuel
name: Pedrocchi, Nicola
name: Valente, Anna
Publisher: name: arXiv
Year: 2023
Subjects: subject: Robotics (cs.RO)
subject: FOS: Computer and information sciences

description: Applications involving humans and robots working together are spreading nowadays. Alongside, modeling and control techniques that allow physical Human-Robot Interaction (pHRI) are widely investigated. To better understand its potential application in pHRI, this work investigates the Cooperative Differential Game Theory modeling of pHRI in a cooperative reaching task, specifically for reference tracking. The proposed controller based on Collaborative Game Theory is deeply analyzed and compared in simulations with two other techniques, Linear Quadratic Regulator (LQR) and Non-Cooperative Game-Theoretic Controller. The set of simulations shows how different tuning of control parameters affects the system response and control efforts of both the players for the three controllers, suggesting the use of Cooperative GT in the case the robot should assist the human, while Non-Cooperative GT represents a better choice in the case the robot should lead the action. Finally, preliminary tests with a trained human are performed to extract useful information on the real applicability and limitations of the proposed method.
Gibbs attractor: a chaotic nearly Hamiltonian system, driven by external harmonic force
Creators: name: Elyutin, P. V.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: A chaotic autonomous Hamiltonian systems, perturbed by small damping and small external force, harmonically dependent on time, can acquire a strange attractor with properties similar to that of the canonical distribution - the Gibbs attractor. The evolution of the energy in such systems can be described as the energy diffusion. For the nonlinear Pullen - Edmonds oscillator with two degrees of freedom the properties of the Gibbs attractor and their dependence on parameters of the perturbation are studied both analytically and numerically.
description: 8 pages RevTeX, 3 figures
title: Atlantic and Arctic food web topologies of the Barents Sea
Creators: name: Kortsch, Susanne
name: Aschan, Michaela
name: Planque, Benjamin
name: Wiedmann, Magnus Aune
name: Jørgensen, Lis Lindal
name: Dalpadado, Padmini
name: Skern-Mauritzen, Mette
name: Johannesen, Edda
name: Michalsen, Kathrine
name: Certain, Grégoire
name: Cochrane, Sabine
name: Primicerio, Raul
Publisher: name: ASC 2012 - Theme session A
Year: 2024
Subjects: Ecosystem observation, processes and dynamics

description: No abstracts are to be cited without prior reference to the author.To study aims at describing the food web structure of the Atlantic and Arctic regions of the Barents Sea (BS) in the context of ecosystem resilience
Suplementary Methods from Mixed-species herding levels the landscape of fear
Creators: name: Stears, Keenan
name: Schmitt, Melissa H.
name: Wilmers, Christopher C.
name: Shrader, Adrian M.
Publisher: name: The Royal Society
Year: 2020
Subjects: subject: Ecology
subject: FOS: Biological sciences
subject: 60801 Animal Behaviour

description: Sample sizes and detailed calculations for the cost of vigilance and its influence on zebra feeding
Oscillons in hyperbolic models
Creators: name: Bazeia, D.
name: Gomes, Adalto R.
name: Nobrega, K. Z.
name: Simas, Fabiano C.
Publisher: name: arXiv
Year: 2019
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In this work we examine kink-antikink collisions in two distinct hyperbolic models. The models depend on a deformation parameter, which controls two main characteristics of the potential with two degenerate minima: the height of the barrier and the values of the minima. In particular, the rest mass of the kinks decreases monotonically as the deformation parameter increases, and we identify the appearance of a gradual suppression of two bounce windows in the kink scattering and the production of long lived oscillons. The two effects are reported in connection to the presence of more than one vibrational state in the stability potential.
description: 17 pages, 8 figures
Biased Metropolis Sampling for Rugged Free Energy Landscapes
Creators: name: Berg, Bernd A.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Soft Condensed Matter (cond-mat.soft)
subject: Quantitative Biology (q-bio)
subject: FOS: Physical sciences
subject: FOS: Biological sciences

description: Metropolis simulations of all-atom models of peptides (i.e. small proteins) are considered. Inspired by the funnel picture of Bryngelson and Wolyness, a transformation of the updating probabilities of the dihedral angles is defined, which uses probability densities from a higher temperature to improve the algorithmic performance at a lower temperature. The method is suitable for canonical as well as for generalized ensemble simulations. A simple approximation to the full transformation is tested at room temperature for Met-Enkephalin in vacuum. Integrated autocorrelation times are found to be reduced by factors close to two and a similar improvement due to generalized ensemble methods enters multiplicatively.
description: Plenary talk at the Los Alamos conference, The Monte Carlo Method in Physical Sciences: Celebrating the 50th Anniversary of the Metropolis Algorithm, to appear in the proceedings, 11 pages, 4 figures, one table. Inconsistencies corrected and references added
AndroLibZoo: A Reliable Dataset of Libraries Based on Software Dependency Analysis
Creators: name: Samhi, Jordan
name: Bissyandé, Tegawendé F.
name: Klein, Jacques
Publisher: name: arXiv
Year: 2023
Subjects: subject: Software Engineering (cs.SE)
subject: FOS: Computer and information sciences

description: Android app developers extensively employ code reuse, integrating many third-party libraries into their apps. While such integration is practical for developers, it can be challenging for static analyzers to achieve scalability and precision when libraries account for a large part of the code. As a direct consequence, it is common practice in the literature to consider developer code only during static analysis --with the assumption that the sought issues are in developer code rather than the libraries. However, analysts need to distinguish between library and developer code. Currently, many static analyses rely on white lists of libraries. However, these white lists are unreliable, inaccurate, and largely non-comprehensive.
 In this paper, we propose a new approach to address the lack of comprehensive and automated solutions for the production of accurate and ``always up to date" sets of libraries. First, we demonstrate the continued need for a white list of libraries. Second, we propose an automated approach to produce an accurate and up-to-date set of third-party libraries in the form of a dataset called AndroLibZoo. Our dataset, which we make available to the community, contains to date 34 813 libraries and is meant to evolve.
Disaster Response Network : Repurposing Military Infrastructure for COVID-19 Pandemic and Other Disasters
Creators: name: Goodman, Anna
Publisher: name: The University of British Columbia
Year: 2020

description: Disaster Response Network is an architectural proposal to convert thirty-two decommissioned Cold War-era ammunition storage depots across the United States into a geographically distributed network of temporary intensive care units available to COVID-19 patients and the victims of future outbreaks. The defunct military infrastructure sites targeted in the proposal collectively contain over 20,000 bunkers. If fully implemented, the project will increase the number of intensive care units in US medical facilities by a factor of four, alleviating strain placed on the system by the current pandemic. The architectural design of the project limits the spread of the disease while ensuring the safety of patients, medical personnel and visitors through carefully planned circulation routes. Visitors interact with patients through protective barriers that allow acoustic and visual connection while blocking virus transmission, addressing issues of loneliness and social isolation that present challenges during illness and hamper recovery. The landscape surrounding the facility is designed to encourage safe access to the outdoors during recovery. In the future, the sites targeted by the project will be used as emergency command centres capable of housing stockpiles of medical supplies and emergency shelters, ensuring preparedness for future outbreaks and other disasters. When active response is not required, remediation efforts will restore the ecological health of the sites themselves, adding to regional biodiversity. Disaster Response Network responds to the current COVID-19 pandemic by restoring obsolete infrastructure, streamlining the country’s disaster response capabilities and enabling more effective response to future concerns.
Selectivity filter conductance, rectification and fluctuations of subdomains - how can this all relate to the value of Hurst exponent in the dwell-times of ion channels states?
Creators: name: Borys, Przemysław
name: Trybek, Paulina
name: Dworakowska, Beata
name: Sekrecka-Belniak, Anna
name: Nurowska, Ewa
name: Bednarczyk, Piotr
name: Wawrzkiewicz-Jałowiecka, Agata
Publisher: name: arXiv
Year: 2025
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: The Hurst effect in the signals describing ion channels' activity has been known for many years. This effect is present in the experimental recordings of single-channel currents, but not only. The sequences of dwell times of functionally different channel states also exhibit long-range correlations. We have found that the memory effect within the dwell-time series is related to the coupling between the channel's activation gate (AG) and selectivity filter (SF), which controls the ion conduction. In this work, we analyzed both the experimental data describing the activity of potassium channels of different types (e.g., BK, mitoBK, mitoTASK-3, mitoKv1.3, TREK-2-like channels) and the series generated according to our previously proposed Hurst effect model. The obtained results suggest that the strength of the allosteric cooperation between the AG and SF determines not only the conductance of the channel - which governs how often ions in SF move or remain blocked - but also modulates the correlations present in the dwell times when sampled with a suitably high sampling rate. Moreover, we found that rectification can interfere with this process, contributing to additional changes in correlations within the channel's sojourns in subsequent states. Similarly, the correlations may be affected by processes proceeding at longer time scales, like interactions with the channel's auxiliary domains or lipid surroundings.
title: Universität Kassel, Vorlesungsverzeichnis WiSe 2013 / 2014
Creators: name: (:Unkn) Unknown
Publisher: name: Universität Kassel
Year: 2013
Subjects: subject: 350
subject: 370
subject: Universität Kassel
subject: Vorlesungsverzeichnis

description: PDF zum Online-Vorlesungsverzeichnis
In situ thermometry of a cold Fermi gas via dephasing impurities
Creators: name: Mitchison, Mark T.
name: Fogarty, Thomàs
name: Guarnieri, Giacomo
name: Campbell, Steve
name: Busch, Thomas
name: Goold, John
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: Quantum Gases (cond-mat.quant-gas)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: The precise measurement of low temperatures is a challenging, important and fundamental task for quantum science. In particular, in-situ thermometry is highly desirable for cold atomic systems due to their potential for quantum simulation. Here we demonstrate that the temperature of a non-interacting Fermi gas can be accurately inferred from the non-equilibrium dynamics of impurities immersed within it, using an interferometric protocol and established experimental methods. Adopting tools from the theory of quantum parameter estimation, we show that our proposed scheme achieves optimal precision in the relevant temperature regime for degenerate Fermi gases in current experiments. We also discover an intriguing trade-off between measurement time and thermometric precision that is controlled by the impurity-gas coupling, with weak coupling leading to the greatest sensitivities. This is explained as a consequence of the slow decoherence associated with the onset of the Anderson orthogonality catastrophe, which dominates the gas dynamics following its local interaction with the immersed impurity.
description: 6+5 pages, 4+4 figures. Final author version
title: Operationalizing ecological robustness and resilience for ecosystem based management
Creators: name: Primicerio, Raul
name: Aschan, Michaela
name: Wiedmann, Magnus
name: Kortsch, Susanne
name: Planque, Benjamin
name: Certain, Grégoire
name: Johannesen, Edda
name: Michalsen, Kathrine
name: Dolgov, Andrey
name: Jørgensen, Lis Lindal
name: Dalpadado, Padmini
name: Skern-Mauritzen, Mette
name: Fossheim, Maria
Publisher: name: ASC 2012 - Theme session A
Year: 2024
Subjects: Fisheries and aquaculture
Technologies and data

description: No abstracts are to be cited without prior reference to the author.The goal of an ecosystem based approach to management is to preserve robust ecosystems that can cope with the environmental pressure imposed by human activities.
Integrability breaking and bound states in Google's decorated XXZ circuits
Creators: name: Hudomal, Ana
name: Smith, Ryan
name: Hallam, Andrew
name: Papić, Zlatko
Publisher: name: arXiv
Year: 2023
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Recent quantum simulation by Google [Nature 612, 240 (2022)] has demonstrated the formation of bound states of interacting photons in a quantum-circuit version of the XXZ spin chain. While such bound states are protected by integrability in a one-dimensional chain, the experiment found the bound states to be unexpectedly robust when integrability was broken by decorating the circuit with additional qubits, at least for small numbers of qubits ($\leq 24$) within the experimental capability. Here we scrutinize this result by state-of-the-art classical simulations, which greatly exceed the experimental system sizes and provide a benchmark for future studies in larger circuits. We find that the bound states consisting of a small and finite number of photons are indeed robust in the non-integrable regime, even after scaling to the infinite time and infinite system size limit. Moreover, we show that such systems possess unusual spectral properties, with level statistics that deviates from the random matrix theory expectation. On the other hand, for low but finite density of photons, we find a much faster onset of thermalization and significantly weaker signatures of bound states, suggesting that anomalous dynamics may only be a property of dilute systems with zero density of photons in the thermodynamic limit. The robustness of the bound states is also influenced by the number of decoration qubits and, to a lesser degree, by the regularity of their spatial arrangement.
description: 19 pages, 15 figures
Field-induced disorder in a gapped spin system with non-magnetic impurities
Creators: name: Mikeska, H. -J.
name: Ghosh, Asimkumar
name: Kolezhuk, A. K.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We study S=1/2 dimers which are weakly coupled by three-dimensional antiferromagnetic interactions J'. It is commonly known that doping with non-magnetic impurities immediately induces a long-range Neel order. We show that application of an external magnetic field H may drive the system back to a disordered phase. We discuss the zero temperature phase diagram in the (H,J') plane and we propose suggestions for experiments.
description: 4 Revtex pages, 2 figures
Supplementary Information for Emergent Cohesion Study from Emergent social cohesion for coping with community disruptions in disasters
Creators: name: Fan, Chao
name: Yucheng Jiang
name: Mostafavi, Ali
Publisher: name: The Royal Society
Year: 2020
Subjects: Environmental Science

description: Social cohesion is an important determinant of community well-being, especially in times of distress such as disasters. This study investigates the phenomena of emergent social cohesion, which is characterized by abrupt, temporary and extensive social ties with the goal of sharing and receiving information regarding a particular event influencing a community. In the context of disasters, emergent social cohesion, enabled by social media usage, could play a significant role in improving the ability of communities to cope with disruptions in recent disasters. In this study, we employed a network reticulation framework to examine the underlying mechanisms influencing emergent social cohesion in online social media while communities cope with disaster-induced disruptions. We analysed neighbourhood-tagged social media data (social media data whose users are tagged by neighbourhoods) in Houston during Hurricane Harvey to characterize four modalities of network reticulation (i.e. enactment, activation, reticulation and performance) giving rise to emergent social cohesion. Our results show that, unlike regular social cohesion, communication history and physical proximity do not significantly affect emergent social cohesion. The results also indicate that weak social ties play an important role in bridging different social network communities, and hence reinforce emergent social cohesion. The findings can inform public officials, emergency managers and decision-makers regarding the important role of neighbourhood-tagged social media, as a new form of community infrastructure, for improving the ability of communities to cope with disaster disruptions through enhanced emergent social cohesion.
Phenomenology and Cosmology of No-Scale Attractor Models of Inflation
Creators: name: Ellis, John
name: Nanopoulos, Dimitri V.
name: Olive, Keith A.
name: Verner, Sarunas
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We have recently proposed attractor models for modulus fixing, inflation, supersymmetry breaking and dark energy based on no-scale supergravity. In this paper we develop phenomenological and cosmological aspects of these no-scale attractor models that underpin their physical applications. We consider models in which inflation is driven by a modulus field ($T$-type) with supersymmetry broken by a Polonyi field, or a matter field ($ϕ$-type) with supersymmetry broken by the modulus field. We derive the possible patterns of soft supersymmetry-breaking terms, which depend in $T$-type models whether the Polonyi and/or matter fields are twisted or not, and in $ϕ$-type models on whether the inflaton and/or other matter fields are twisted or not. In $ϕ$-type models, we are able to directly relate the scale of supersymmetry breaking to the inflaton mass. We also discuss cosmological constraints from entropy considerations and the density of dark matter on the mechanism for stabilizing the modulus field via higher-order terms in the no-scale Kähler potential.
description: 41 pages, 2 figures, published version
title: The New Business of AI Software Vendors in the European Manufacturing Industry - An Empirical Study on Business Models of Entrepreneurial AI Software Vendors
Creators: name: Fip, Niklas
Publisher: name: TU Wien
Year: 2021
Subjects: subject: Artificial Intelligence
subject: Business Models
subject: Startups
subject: Industrial Tech
subject: European Manufacturing Industry

description: This thesis’s topic is the business model analysis of entrepreneurial companies that provide artificial intelligence solutions to the manufacturing industry. Additionally, the thesis provides an overview of state-of-the art AI technologies and applications common in the manufacturing industry. In virtue of the 4th industrial revolution, Artificial Intelligence (AI) technologies have found their way into the manufacturing industry. The technology revolutionizes production in a range of applications, from predicting machine downtime to assuring quality through computer vision. With various deployment possibilities, the opportunities of AI in manufacturing are manifold. In many cases this technology is provided by a multitude of vendors that specialize in manufacturing-specific AI software. The vendors range from large technology incumbents to upcoming technology startups. Especially entrepreneurial AI software vendors have been emerging over the last decade, imposing direct competition to well-known technology companies. However, it is yet unclear how entrepreneurial AI vendors employ their offerings to the manufacturing firms and whether there are any identifiable patterns that have emerged. To bring clarity into this uprising research field, a qualitative content analysis was adopted to study the business models of entrepreneurial AI software vendors. The vendors are registered in the crowdsourced Dealroom database and were sampled according to predefined criteria. The business model information was primarily extracted from the websites of those companies and systemized according to a conceptual framework proposed in this thesis. The result of this thesis yielded in a typology of entrepreneurial vendors. The typology provides valuable insights into the emerging world of AI vendors in the European manufacturing industry. Moreover, the thesis recommends a need to further understand the various type of vendors by extending the sample size to a global level and verify the application of the proposed framework.
Gauge invariant reduction to the light-front
Creators: name: Kvinikhidze, A. N.
name: Blankleider, B.
Publisher: name: arXiv
Year: 2003
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The problem of constructing gauge invariant currents in terms of light-cone bound-state wave functions is solved by utilising the gauging of equations method. In particular, it is shown how to construct perturbative expansions of the electromagnetic current in the light-cone formalism, such that current conservation is satisfied at each order of the perturbation theory.
description: 12 pages, revtex4
Real-space quantum-to-classical transition of time dependent background fluctuations
Creators: name: Chandran, S. Mahesh
name: Rajeev, Karthik
name: Shankaranarayanan, S.
Publisher: name: arXiv
Year: 2023
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Theory (hep-th)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Understanding the emergence of classical behavior from a quantum theory is vital to establishing the quantum origin for the temperature fluctuations observed in the Cosmic Microwave Background (CMB). We show that a real-space approach can comprehensively address the quantum-to-classical transition problem in the leading order of curvature perturbations. To this end, we test spatial bipartitions of quadratic systems for the interplay between three different signatures of classical behavior: i) decoherence, ii) peaking of the Wigner function about classical trajectories, and iii) relative suppression of non-commutativity in observables. We extract these signatures from the covariance matrix of a multi-mode Gaussian state and address them primarily in terms of entanglement entropy and log-classicality. Through a phase-space stability analysis of spatial sub-regions via their reduced Wigner function, we ascertain that the underlying cause for the dominance of classicality signatures is the occurrence of gapped inverted mode instabilities. While the choice of conjugate variables enhances some of these signatures, decoherence studied via entanglement entropy is the stronger and more reliable condition for classicality to emerge. We demonstrate the absence of decoherence, which preempts a quantum-to-classical transition of scalar fluctuations in an expanding background in $(1+1)$-dimensions using two examples: i) a Tanh-like expansion and ii) a de-Sitter expansion. We provide connection between log classicality and particle number by studying the evolution of each normal mode at late times. We then extend the analysis to leading order fluctuations in $(3+1)-$dimensions to show that a quantum-to-classical transition occurs in the de-Sitter expansion and discuss the relevance of our analysis in distinguishing cosmological models.
description: Version 2: 45 pages, 9 figures, 1 Table. Improved plots and included additional discussions. Results unchanged. Version accepted in Phys. Rev. D
Cosmological Rescaling through Warped Space
Creators: name: Chen, Xingang
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Astrophysics (astro-ph)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We discuss a scenario where at least part of the homogeneity on a brane world can be directly related to the hierarchy problem through warped space. We study the dynamics of an anti-D3-brane moving toward the infrared cut-off of a warped background. After a region described by the DBI action, the self-energy of the anti-D3-brane will dominate over the background. Then the world-volume scale of the anti-D3-brane is no longer comoving with the background geometry. After it settles down in the infrared end, the world-volume inhomogeneity will appear, to a Poincare observer, to be stretched by an exponentially large ratio. This ratio is close to that of the hierarchy problem between the gravitational and electroweak scales.
description: 12 pages, 2 figures; v2, PRD version, comments and references added
Stigmatophora (Bifurcistigma) longa Zhang, Zhao & Han, 2025, sp. nov.
Creators: name: Zhang, Lu
name: Zhao, Tingting
name: Han, Huilin
Publisher: name: Zenodo
Year: 2025
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Lepidoptera
Erebidae
Stigmatophora
Stigmatophora longa

description: Stigmatophora (Bifurcistigma) longa sp. nov.
Figs 4, 5, 17, 18 Common name. 龙痣苔蛾
Material examined.
Holotype: China • ♂; Heilongjiang, Shangzhi, Changshou, Laoyeling; 5. VIII. 2009; P. Wang et. al. leg.; genit. prep. no. wp-90-1, in NEFU.
Paratype: 1 ♂, same data as holotype; genit. prep. no. wp-89-1, in NEFU.
Diagnosis.
This new species is highly similar to S. (B.) obraztsovi (Figs 1, 2, 13, 14, 23) and S. (B.) bucseki (Figs 3, 6, 15, 16, 24), but can be distinguished by the following morphological characters (details for S. (B.) obraztsovi and S. (B.) bucseki are in parentheses, respectively): in S. (B.) longa, band on M 2 not connected with costal margin (completely connected; slightly connected). In the male genitalia, ampulla sclerotized and crutch-shaped (narrow and slender; shorter and horn-shaped).
Description.
Adults (Figs 4, 5). Forewing length 9.8 mm in male. Antenna filiform. Thorax dark brown; tegula chocolate; abdomen taupe-brown, lighter on last abdominal segment. Forewing ground color brownish-black, with orange bands along costal, inner, and lower margins of cell and veins M 2 and Cu 1; bands along M 2 and Cu 1 slightly widening toward outer margin, band along inner margin not reaching anal angle. Hindwing ground color brown, terminal line distinct, fringe brown. Male genitalia (Figs 17, 18). Uncus sclerotized, robust, and blunt at apex. Tegumen bell-shaped, ca 1.21 times as long as valva. Valva wide, with cucullus rounded. Costa relatively smooth, mid-region slightly concaved. Sacculus sclerotized, wide at base, tapering towards end, sacculus process hooked, separated from valva. Ampulla strongly sclerotized, elongated, crutch-shaped. Lamella centralis moderately sclerotized, extending from base of ampulla to sacculus process. Vinculum strongly sclerotized, V-shaped. Juxta with two weakly sclerotized lateral lobes, kidney-shaped. Aedeagus robust, slightly bent near vesica. Carinal plate weakly sclerotized. Vesica nearly spherical, thin membranous near base, granulated at middle, and with a row of short, distal cornuti distributed. Female genitalia. Unknown.
Bionomics.
The type series was collected in early August at an altitude of 1318 m in a mixed coniferous and broadleaf forest. The forest floor was covered with dense growth of shrubs and trees.
Distribution.
China (Heilongjiang: Shangzhi) (Fig. 27).
Etymology.
The species is named after “ loong ”, in honor of the current year of the Chinese zodiac, and it also represents the species collection location, Heilongjiang.
description: Published as part of Zhang, Lu, Zhao, Tingting & Han, Huilin, 2025, A new subgenus of Stigmatophora Staudinger, 1881 (Lepidoptera, Erebidae, Arctiinae, Lithosiini) from China, with descriptions of three new species, pp. 303-317 in ZooKeys 1226 on pages 303-317, DOI: 10.3897/zookeys.1226.138892