cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Hypergraph Convolutional Network based Weakly Supervised Point Cloud Semantic Segmentation with Scene-Level Annotations
Creators: name: Lu, Zhuheng
name: Zhang, Peng
name: Dai, Yuewei
name: Li, Weiqing
name: Su, Zhiyong
Publisher: name: arXiv
Year: 2022
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Graphics (cs.GR)
subject: FOS: Computer and information sciences

description: Point cloud segmentation with scene-level annotations is a promising but challenging task. Currently, the most popular way is to employ the class activation map (CAM) to locate discriminative regions and then generate point-level pseudo labels from scene-level annotations. However, these methods always suffer from the point imbalance among categories, as well as the sparse and incomplete supervision from CAM. In this paper, we propose a novel weighted hypergraph convolutional network-based method, called WHCN, to confront the challenges of learning point-wise labels from scene-level annotations. Firstly, in order to simultaneously overcome the point imbalance among different categories and reduce the model complexity, superpoints of a training point cloud are generated by exploiting the geometrically homogeneous partition. Then, a hypergraph is constructed based on the high-confidence superpoint-level seeds which are converted from scene-level annotations. Secondly, the WHCN takes the hypergraph as input and learns to predict high-precision point-level pseudo labels by label propagation. Besides the backbone network consisting of spectral hypergraph convolution blocks, a hyperedge attention module is learned to adjust the weights of hyperedges in the WHCN. Finally, a segmentation network is trained by these pseudo point cloud labels. We comprehensively conduct experiments on the ScanNet and S3DIS segmentation datasets. Experimental results demonstrate that the proposed WHCN is effective to predict the point labels with scene annotations, and yields state-of-the-art results in the community. The source code is available at http://zhiyongsu.github.io/Project/WHCN.html.
On the practical usefulness of the Hardware Efficient Ansatz
Creators: name: Leone, Lorenzo
name: Oliviero, Salvatore F. E.
name: Cincio, Lukasz
name: Cerezo, M.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Variational Quantum Algorithms (VQAs) and Quantum Machine Learning (QML) models train a parametrized quantum circuit to solve a given learning task. The success of these algorithms greatly hinges on appropriately choosing an ansatz for the quantum circuit. Perhaps one of the most famous ansatzes is the one-dimensional layered Hardware Efficient Ansatz (HEA), which seeks to minimize the effect of hardware noise by using native gates and connectives. The use of this HEA has generated a certain ambivalence arising from the fact that while it suffers from barren plateaus at long depths, it can also avoid them at shallow ones. In this work, we attempt to determine whether one should, or should not, use a HEA. We rigorously identify scenarios where shallow HEAs should likely be avoided (e.g., VQA or QML tasks with data satisfying a volume law of entanglement). More importantly, we identify a Goldilocks scenario where shallow HEAs could achieve a quantum speedup: QML tasks with data satisfying an area law of entanglement. We provide examples for such scenario (such as Gaussian diagonal ensemble random Hamiltonian discrimination), and we show that in these cases a shallow HEA is always trainable and that there exists an anti-concentration of loss function values. Our work highlights the crucial role that input states play in the trainability of a parametrized quantum circuit, a phenomenon that is verified in our numerics.
Printing non-Euclidean solids
Creators: name: Zurlo, Giuseppe
name: Truskinovsky, Lev
Publisher: name: arXiv
Year: 2017
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: Geometrically frustrated solids with non-Euclidean reference metric are ubiquitous in biology and are becoming increasingly relevant in technological applications. Often they acquire a targeted con- figuration of incompatibility through surface accretion of mass as in tree growth or dam construction. We use the mechanics of incompatible surface growth to show that geometrical frustration develop- ing during deposition can be fine-tuned to ensure a particular behavior of the system in physiological (or working) conditions. As an illustration, we obtain an explicit 3D printing protocol for arteries, which guarantees stress uniformity under inhomogeneous loading, and for explosive plants, allowing a complete release of residual elastic energy with a single cut. Interestingly, in both cases reaching the physiological target requires the incompatibility to have a topological (global) component.
description: 5 pages, 4 figures
PINN-based Reconstruction of Rising Bubbles
Creators: name: Silva, R. M.
name: Grave, M.
name: Coutinho, A. L. G. A.
Publisher: name: Zenodo
Year: 2022
Subjects: Physics-Informed Neural Networks
Bubble Dynamics
Inverse Problems

description: Inverse problems in fluid mechanics play an essential role in science and engineering, especially when it comes to optimal design, reconstruction of biomedical and geophysical flows, parameter estimation, and more. These inverse problems are often ill-posed, thus, it is challenging or sometimes even impossible to solve them using traditional methods. Moreover, the generation of simulated data for ill-posed inverse problems can become very costly where simulation needs to be performed multiple times to either discover missing physics in the model or calibrate the free parameters in the model. One possible alternative for solving these problems is through the use of Physics-Informed Neural Networks - PINNs, in which we approximate the problem’s solution using Neural Networks while incorporating the known data and physical laws when training it, and also easily enabling us to take advantage of computational resources like GPUs without much effort. Here, we show a PINN-based framework for reconstructing the velocity field for gas bubbles rising in viscous liquid problems. The synthetic data is generated using a phase-field approach, while the reconstruction performed using PINNs uses a level-set approach. The only provided data consists of a set of snapshots containing the flow visualization, i.e., the phase-field, from which we try to infer the velocities and pressure fields. Our approach does not require any reinitialization scheme, as is usual when using a level-set approach and traditional numerical methods. Such a scheme can reconstruct the flow quantities with reasonable accuracy, and it is straightforward to parallelize when using a data-parallel approach.
Axioms for the category of Hilbert spaces and linear contractions
Creators: name: Heunen, Chris
name: Kornell, Andre
name: van der Schaaf, Nesta
Publisher: name: arXiv
Year: 2022
Subjects: subject: Category Theory (math.CT)
subject: Quantum Physics (quant-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: The category of Hilbert spaces and linear contractions is characterised by elementary categorical properties that do not refer to probabilities, complex numbers, norm, continuity, convexity, or dimension.
description: 17 pages; clarified proof of Lemma 20
Data and Machine Learning Model Management with Gypscie
Creators: name: Porto, F.
name: Valduriez, P.
Publisher: name: Zenodo
Year: 2022
Subjects: MLSystems
Machine Learning
Model Selection
Array DBMS

description: Data-driven research has become a major methodological approach in different disciplines. It involves collecting, pre-processing, and exploring measurement data, and using the data at various stages of the machine learning model life-cycle. During the latter process, a myriad of artifacts are produced and must be managed to support provenance, reproducibility, and explainability. Moreover, abstracting a number of runtime decisions from non-savvy scientists enables reaching out to a large community of users as much as enabling automatic optimization decisions. The Gypscie ecosystem is in development at the DEXL Lab and aims at supporting the machine learning life-cycle. This extended abstract will highlight its main characteristics and supported functionality.
Probing the fluctuations of the optical properties in time-resolved spectroscopy
Creators: name: Randi, Francesco
name: Esposito, Martina
name: Giusti, Francesca
name: Parmigiani, Fulvio
name: Misochko, Oleg
name: Fausti, Daniele
name: Eckstein, Martin
Publisher: name: arXiv
Year: 2017
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We show that, in optical pump-probe experiments on bulk samples, the statistical distribution of the intensity of ultrashort light pulses after the interaction with a nonequilibrium complex material can be used to measure the time-dependent noise of the current in the system. We illustrate the general arguments for a photo-excited Peierls material. The transient noise spectroscopy allows to measure to what extent electronic degrees of freedom dynamically obey the fluctuation-dissipation theorem, and how well they thermalize during the coherent lattice vibrations. The proposed statistical measurement developed here provides a new general framework to retrieve dynamical information on the excited distributions in nonequilibrium experiments which could be extended to other degrees of freedom of magnetic or vibrational origin.
description: 10 pages, 3 figures, journal paper
To share and not share a singlet: control qubit and nonclassicality in teleportation
Creators: name: Sen, Kornikar
name: Ajith, Adithi
name: Halder, Saronath
name: Sen, Ujjwal
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The superposition principle provides us the opportunity to unfold many surprising facts. One such fact leads to the generation of entanglement which may allow one to teleport an unknown quantum state from one location to another. We try to understand the role of superposition in the process of quantum teleportation. We consider, within the scenario of quantum teleportation, a set-up where the sender and the receiver are in a superposed situation of using a maximally entangled state and not using any entangled state in the teleportation protocol, controlled by a qubit. We address two distinct protocols: in the first case, the sender and the receiver do nothing when they do not have the authority to use entanglement, while in the second case, they still use classical communication even if they do not use entanglement. After accomplishing the protocols, we operate a Hadamard gate on the control qubit, measure the control qubit's state, and consider the outcome corresponding to a particular state of the control. We compare the protocol's fidelity with the maximum fidelity achievable through classical resources only. In particular, we provide conditions to achieve nonclassical fidelity in teleportation, in the presence of the control qubit. To explore if there is any quantum advantage (advantage of superposition present in the control qubit), we compare the fidelities of the control qubit-based protocols with the fidelity achieved in a situation where the two parties are in a classical mixture of using and not using the maximally entangled state. We observe that there exists a wide range of parameters defining the initial state of the control qubit for which our protocols provide quantum advantage. To analyse the role of superposition quantitatively, we discuss whether the amount of quantum advantage can be expressed in terms of quantum coherence present in the state of the control qubit.
description: Title changed; close to published version
Evolution of linear wave dark matter perturbations in the radiation-dominant era
Creators: name: Zhang, Ui-Han
name: Chiueh, Tzihong
Publisher: name: arXiv
Year: 2017
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Linear perturbations of the wave dark matter, or $ψ$ dark matter ($ψ$DM), of particle mass $\sim 10^{-22}$eV in the radiation-dominant era are analyzed, and the matter power spectrum at the photon-matter equality is obtained. We identify four phases of evolution for $ψ$DM perturbations, where the dynamics can be vastly different from the counterparts of cold dark matter (CDM). While in late stages after mass oscillation long-wave $ψ$DM perturbations are almost identical to CDM perturbations, some subtle differences remain, let alone intermediate-to-short waves that bear no resemblance with those of CDM throughout the whole evolutionary history. The dissimilarity is due to quantum mechanical effects which lead to severe mode suppression. We also discuss the axion model with a cosine field potential. The power spectrum of axion models are generally almost identical to those of $ψ$DM, but in the extreme case when the initial axion angle is near the field potential top, this axion model predict a power excess over a range of wave number and a higher spectral cutoff than $ψ$DM as if $ψ$DM had a higher particle mass.
description: 20 pages, 7 figures
How can art practice provide a rebalancing and re-evaluation of the canonic legacy of Kurt Schwitters?
Creators: name: Haynes, Jackie
Publisher: name: Lancaster University
Year: 2022

description: Through art practice-based research, this inquiry sets out to reveal and reassess the enduring contemporary resonance of art and literature by the German Dada artist Kurt Schwitters. My methodology of ‘errantry’ goes in search of adventure, an artistic research adventure of making artwork and performance ‘on-the-move’. Commitment to my methodology has generated portable materials, processes and artwork dissemination methods by notionally walking alongside Schwitters’ oeuvre and inclining towards it, as if in conversation. The body of new artwork foregrounded in Plates proceeds the Introduction and Navigating the Research Realm chapters, which situate my inquiry and contributions to knowledge in the overlapping fields of contemporary art, art practice-based research, feminism and scholarship of Schwitters, Dada and De Stijl. Chapter Three examines Schwitters’ short story of Augusta Bolte through performance methods, Chapter Four examines the scope and effects of my artworks in relation to Schwitters as ‘Transformative Sites’, and the Conclusion reasserts and substantiates my contributions to knowledge. My interpretation of Schwitters’ resourcefulness adds value and an environmentally sensitive dimension of my recycled art materials, artworks and methods of dissemination. Schwitters’ dadaistic collaborations are reconfigured through my artwork by the attachment of feminist theories, methodologies and conceptualisations in the Special Collection of Feminist Strategies. I have made inroads into the over-emphasis of Merz as Schwitters’ only ‘named brand’ which tends to exclude his Tran texts and the i-poem, particularly for an anglophone audience. My artistic research unlocks collaborative insights into Dada. Texts by Melchior Vischer, Lásló Moholy-Nagy and Theo Van Doesburg’s two aliases, Aldo Camini and I.K. Bonset, illuminate Schwitters’ oeuvre through Augusta Bolte. My parallel study of Mina Loy and Schwitters exposes commonalities thrown into relief by their differences, whilst contributing to discourse on a canonically overlooked female Dadaist.
High-Mobility OFDM Downlink Transmission with Large-Scale Antenna Array
Creators: name: Guo, Wei
name: Zhang, Weile
name: Mu, Pengcheng
name: Gao, Feifei
Publisher: name: arXiv
Year: 2017
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: In this correspondence, we propose a new receiver design for high-mobility orthogonal frequency division multiplexing (OFDM) downlink transmissions with a large-scale antenna array. The downlink signal experiences the challenging fast time-varying propagation channel. The time-varying nature originates from the multiple carrier frequency offsets (CFOs) due to the transceiver oscillator frequency offset (OFO) and multiple Doppler shifts. Let the received signal first go through a carefully designed beamforming network, which could separate multiple CFOs in the spatial domain with sufficient number of receive antennas. A joint estimation method for the Doppler shifts and the OFO is further developed. Then the conventional single-CFO compensation and channel estimation method can be carried out for each beamforming branch. The proposed receiver design avoids the complicated time-varying channel estimation, which differs a lot from the conventional methods. More importantly, the proposed scheme can be applied to the commonly used time-varying channel models, such as the Jakes' channel model.
Early Results from TUS, the First Orbital Detector of Extreme Energy Cosmic Rays
Creators: name: Zotov, Mikhail
Publisher: name: arXiv
Year: 2017
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: TUS is the world's first orbital detector of extreme energy cosmic rays (EECRs), which operates as a part of the scientific payload of the Lomonosov satellite since May 19, 2016. TUS employs the nocturnal atmosphere of the Earth to register ultraviolet (UV) fluorescence and Cherenkov radiation from extensive air showers generated by EECRs as well as UV radiation from lightning strikes and transient luminous events, micro-meteors and space debris. The first months of its operation in orbit have demonstrated an unexpectedly rich variety of UV radiation in the atmosphere. We briefly review the design of TUS and present a few examples of events recorded in a mode dedicated to registering EECRs.
description: 8 pages, to appear in the proceedings of UHECR2016, Kyoto, 11-14 October 2016; version 2: minor changes following referee's suggestions; version 3: typo in the caption of Fig.2 fixed
Philip Vannini, Material Culture and Technology in Everyday Life. Ethnographical Approaches, Peter Lang, 2009
Creators: name: Magaudda, Paolo
Publisher: name: Tecnoscienza – Italian Journal of Science & Technology Studies
Year: 2011

description: Tecnoscienza – Italian Journal of Science & Technology Studies, Vol. 2 No. 1 (2011): Tecnoscienza Nr. 3
Hiding neutrino mass in modified gravity cosmologies
Creators: name: Bellomo, Nicola
name: Bellini, Emilio
name: Hu, Bin
name: Jimenez, Raul
name: Pena-Garay, Carlos
name: Verde, Licia
Publisher: name: arXiv
Year: 2016
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Cosmological observables show a dependence with the neutrino mass, which is partially degenerate with parameters of extended models of gravity. We study and explore this degeneracy in Horndeski generalized scalar-tensor theories of gravity. Using forecasted cosmic microwave background and galaxy power spectrum datasets, we find that a single parameter in the linear regime of the effective theory dominates the correlation with the total neutrino mass. For any given mass, a particular value of this parameter approximately cancels the power suppression due to the neutrino mass at a given redshift. The extent of the cancellation of this degeneracy depends on the cosmological large-scale structure data used at different redshifts. We constrain the parameters and functions of the effective gravity theory and determine the influence of gravity on the determination of the neutrino mass from present and future surveys.
description: Matched the published version
Wiederverwertung eigener Texte in der Wissenschaft
Creators: name: Hagenström, Felix
Publisher: name: Zenodo
Year: 2022

description: Dieses Arbeitspapier erläutert das Phänomen der Wiederverwertung eigener Texte in der Wissenschaft. In Anlehnung an neueste Arbeiten wird dafür argumentiert, den Begriff des Selbstplagiats zu verwerfen und stattdessen die breitere Kategorie des Textrecyclings zu etablieren. Letztere enthält sowohl aus GWP-Perspektive inakzeptable als auch akzeptable Wiederverwertungen eigener Texte.
Cartographies from the Margins: Outline of the Development and Applications of Actor-Network Theory in Spain
Creators: name: Castillo Sepúlveda, Jorge
Publisher: name: Tecnoscienza – Italian Journal of Science & Technology Studies
Year: 2011

description: In Spain, since the start of the 1990s, there has arisen a joint movement of recognition, production and hybridization in the social sciences with one of its apexes being the field of STS. This has acquired a specific form in Actor-Network Theory, which in certain research groups, has become a tool for translating the reflective activity and research conducted so far in relational and material terms. This text traces the path of development of Actor-Network Theory in Spain based on the consideration of three themes. First, its evolution over time and the identification of certain periods, differentiated in terms of the work carried out during them; second, the spaces, texts and people recognizable in these processes; third, the naming of certain areas of research interest. Finally, some reflections made public at the Primer Encuentro Estatal ANT will be mentioned. These may serve to highlight certain aspects of work currently being carried out and the future of this theory in Spain.
description: Tecnoscienza – Italian Journal of Science & Technology Studies, Vol. 2 No. 1 (2011): Tecnoscienza Nr. 3
Photoproduction of doubly heavy baryon at the LHeC
Creators: name: Huan-Yu, Bi
name: Ren-You, Zhang
name: Wu, Xing-Gang
name: Wen-Gan, Ma
name: Xiao-Zhou, Li
name: Owusu, Samuel
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The photoproduction of doubly heavy baryon, $Ξ_{cc}$, $Ξ_{bc}$ and $Ξ_{bb}$, is predicted within the nonrelativistic QCD at the Large Hadron Electron Collider (LHeC). The $Ξ_{QQ'}$ production via the photon-gluon fusing channel $γ+ g \to \langle{QQ'}\rangle[n] +\bar{Q} +\bar{Q'}$ and the extrinsic heavy quark channel $γ+ Q \to \langle{QQ'}\rangle[n]+\bar{Q'}$ have been considered, where $Q$ or $Q'$ stand for heavy $c$ or $b$ quark and $\langle{QQ'}\rangle[n]$ stands for a $QQ'$ diquark with given spin- and color- configurations $[n]$. The diquark shall fragmentate into $Ξ_{QQ'}$ baryon with high probability. For $Ξ_{cc}$ and $Ξ_{bb}$ production, $[n]$ equals $[^1S_0]_{\textbf{6}}$ (in configurations spin-singlet $^1S_0$-wave and color-sextuplet $\textbf{6}$) or $[^3S_1]_{\bar{\textbf{3}}}$ (in configurations spin-triplet $^3S_1$-wave and color-antitriplet $\bar{\textbf{3}}$) and for $Ξ_{bc}$ production, $[n]$ equals $[^1S_0]_{\bar{\textbf{3}}}$, $[^1S_0]_{\textbf{6}}$, $[^3S_1]_{\bar{\textbf{3}}}$ or $[^3S_1]_{\textbf{6}}$. A detailed comparison of those channels and configurations on total and differential cross sections, together with their uncertainties, is presented. We find the dominate contributions for $Ξ_{QQ'}$ production are from extrinsic heavy quark channel and for $[^3S_1]_{\bar{\textbf{3}}}$ configuration; While other diquark states can also provide sizable contributions to the $Ξ_{QQ'}$ production. As a combination of all the mentioned channels and configurations and by taking $m_c=1.80\pm0.10$ GeV and $m_b=5.1\pm0.20$ GeV, we observe that $(6.70^{+1.40}_{-1.10})\times 10^{3}$ $Ξ_{bb}$, $(8.81^{+3.08}_{-2.20})\times 10^{6}$ $Ξ_{cc}$ and $(4.63^{+1.21}_{-0.92})\times 10^{5}$ $Ξ_{bc}$ events can be generated at the LHeC in one operation year.
Inflationary Primordial Black Holes as All Dark Matter
Creators: name: Inomata, Keisuke
name: Kawasaki, Masahiro
name: Mukaida, Kyohei
name: Tada, Yuichiro
name: Yanagida, Tsutomu T.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Following a new microlensing constraint on primordial black holes (PBHs) with $\sim10^{20}$--$10^{28}\,\mathrm{g}$~[1], we revisit the idea of PBH as all Dark Matter (DM). We have shown that the updated observational constraints suggest the viable mass function for PBHs as all DM to have a peak at $\simeq 10^{20}\,\mathrm{g}$ with a small width $σ\lesssim 0.1$, by imposing observational constraints on an extended mass function in a proper way. We have also provided an inflation model that successfully generates PBHs as all DM fulfilling this requirement.
description: 7 pages, 3 figures
Biology, Ethnography and STS: An interview with Christine Hine
Creators: name: Hine, Christine
name: Bruni, Attila
name: Magaudda, Paolo
Publisher: name: Tecnoscienza – Italian Journal of Science & Technology Studies
Year: 2011

description: Christine Hine talks with Tecnoscienza about her academic trajectory and passions, from botany and biology to her entry into the STS field. In this interview she comments on her most famous book (Virtual Ethnography) and her latest work (Systematics as Cyberscience) which traces linkages between science practice and knowledge, ICTS and biology. Going back to her first academic background as a natural scientist, Christine Hine also recalls her experience as past president of EASST and asked about what young STS scholars would nowadays need, emphasizes the absolute centrality of networking and collaborations to foster the field with new yeast.
description: Tecnoscienza – Italian Journal of Science & Technology Studies, Vol. 2 No. 1 (2011): Tecnoscienza Nr. 3
Felix Lüttge, Auf den Spuren des Wals. Geographien des Lebens im 19. Jahrhundert. Göttingen, Wallstein 2020
Creators: name: Hansen, Jan
Publisher: name: Humboldt-Universität zu Berlin
Year: 2021
Subjects: subject: 940 Geschichte Europas
subject: 970 Geschichte Nordamerikas

description: Dieser Beitrag ist mit Zustimmung des Rechteinhabers aufgrund einer (DFG-geförderten) Allianz- bzw. Nationallizenz frei zugänglich.
Weighing neutrinos in dynamical dark energy models
Creators: name: Zhang, Xin
Publisher: name: arXiv
Year: 2017
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We briefly review the recent results of constraining neutrino mass in dynamical dark energy models using cosmological observations and summarize the findings. (i) In dynamical dark energy models, compared to $Λ$CDM, the upper limit of $\sum m_ν$ can become larger and can also become smaller. In the cases of phantom and early phantom (i.e., the quintom evolving from $w-1$), the constraint on $\sum m_ν$ becomes looser; but in the cases of quintessence and early quintessence (i.e., the quintom evolving from $w>-1$ to $w
description: 3 pages
Weakly parametrized Jastrow ansatz for a strongly correlated Bose system
Creators: name: Lutsyshyn, Yaroslav
Publisher: name: arXiv
Year: 2016
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: We consider the Jastrow pair-product wavefunction for the strongly correlated Bose systems, in our case liquid helium-4. An ansatz is proposed for the pair factors which consists of a numeric solution to a modified and parametrized pair scattering equation. We consider a number of such simple one-variable parametrizations. Additionally, we allow for a parametrizeable cutoff of the pair factors and for the addition of a long-range phonon tail. This approach results in the many-body wavefunctions that have between just one and three parameters. Calculation of observables is carried with the Variational Monte Carlo method. We find that such a simple parametrization is sufficient to produce results that are comparable in quality to the best available two-body Jastrow factors for helium. For two-parameter wavefunction, we find variational energies of $-6.04$~K per particle for a system of one thousand particles. It is also shown that short-range two-body correlations are reproduced in detail by two- and three-parameter functions.
Care in Practice. On Normativity, Concepts, and Boundaries
Creators: name: Mol, Annemarie
name: Moser, Ingunn
name: Piras, Enrico Maria
name: Turrini, Mauro
name: Pols, Jeannette
name: Zanutto, Alberto
Publisher: name: Tecnoscienza – Italian Journal of Science & Technology Studies
Year: 2011

description: In recent years many STS scholars have dealt with care practices in different fields. Starting from Care in Practice. On Tinkering in Clinics, Homes and Farms [Transcript-Verlag, Bielefield, 2010, 325 pp.], a book edited by Annemarie Mol, Ingunn Moser and Jeannette Pols, this debate aims to discuss the meaning and development of the concept of care and its accomplishment in practice. Mauro Turrini, Enrico Maria Piras and Alberto Zanutto wrote two commentaries on the book, while the editors answered to their observations. The result is a vibrant discussion that goes beyond the care to address issues such as the need / refusal to define and delimit concepts in doing social research and what these boundaries mean / do.
description: Tecnoscienza – Italian Journal of Science & Technology Studies, Vol. 2 No. 1 (2011): Tecnoscienza Nr. 3
Duality constraints on effective actions
Creators: name: Garousi, Mohammad R.
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Superstring theories at low energy limit are described by the corresponding supergravities, and their non-perturbative D-brane/O-plane excitations are described by DBI and WZ actions. Higher derivative corrections to these effective actions are important for understanding the stringy behavior of the fundamental objects. They may be extracted from the contact terms of the corresponding S-matrix elements. On the other hand, the superstring theories enjoy the T- and S-dualities which appear in the S-matrix elements as duality Ward identities. These Ward identities might be used as generating functions for constructing the S-matrix elements. The dualities may also be used directly to construct the effective actions. In this article, we review the duality Ward identities which can be used to generate S-matrix elements, and review the dualities which may be used directly to construct the higher derivative corrections to the effective actions.
description: 52 pages, latex file, no figure, invited review for Physics Report; v2:references added, minor corrections, the published version
Feynman-Kac formula and asymptotic behavior of the minimal energy for the relativistic Nelson model in two spatial dimensions
Creators: name: Hinrichs, Benjamin
name: Matte, Oliver
Publisher: name: arXiv
Year: 2022
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We consider the renormalized relativistic Nelson model in two spatial dimensions for a finite number of spinless, relativistic quantum mechanical matter particles in interaction with a massive scalar quantized radiation field. We find a Feynman-Kac formula for the corresponding semigroup and discuss some implications such as ergodicity and weighted $L^p$ to $L^q$ bounds, for external potentials that are Kato decomposable in the suitable relativistic sense. Furthermore, our analysis entails upper and lower bounds on the minimal energy for all values of the involved physical parameters when the Pauli principle for the matter particles is ignored. In the translation invariant case (no external potential) these bounds permit to compute the leading asymptotics of the minimal energy in the three regimes where the number of matter particles goes to infinity, the coupling constant for the matter-radiation interaction goes to infinity and the boson mass goes to zero.
description: restructured and extended manuscript, version accepted for publication in Annales Henri Poincar\'e, 52 pages
Race, beyond Fact and Fiction
Creators: name: M'charek, Amade
Publisher: name: Tecnoscienza – Italian Journal of Science & Technology Studies
Year: 2011

description: What is biological race and how is it made relevant in specific practices? How to address the materiality of biological race without fixing it? And how to write about it without reifying race as a singular object? These are the central questions in this short essay. Instead of debunking or trivializing biological race, it wants to attend to race and investigate how it is made relevant in practices. I am interested in what it is made to be in them. By engaging with race in practices, I want to move away from two dominant and mutually exclusive notions: race as a fact, and race as a fiction. As a contrast to these approaches I present one short case to show how race is enacted but also that it is both factual and fictional.
description: Tecnoscienza – Italian Journal of Science & Technology Studies, Vol. 2 No. 1 (2011): Tecnoscienza Nr. 3
On Iterative Algorithms for Quantitative Photoacoustic Tomography in the Radiative Transport Regime
Creators: name: Wang, Chao
name: Zhou, Tie
Publisher: name: arXiv
Year: 2017
Subjects: subject: Quantitative Methods (q-bio.QM)
subject: Numerical Analysis (math.NA)
subject: Optimization and Control (math.OC)
subject: FOS: Biological sciences
subject: FOS: Mathematics

description: In this paper, we describe the numerical reconstruction method for quantitative photoacoustic tomography (QPAT) based on the radiative transfer equation (RTE), which models light propagation more accurately than diffusion approximation (DA). We investigate the reconstruction of absorption coefficient and/or scattering coefficient of biological tissues. Given the scattering coefficient, an improved fixed-point iterative method is proposed to retrieve the absorption coefficient for its cheap computational cost. And we prove the convergence. To retrieve two coefficients simultaneously, Barzilai-Borwein (BB) method is applied. Since the reconstruction of optical coefficients involves the solution of original and adjoint RTEs in the framework of optimization, an efficient solver with high accuracy is improved from~\cite{Gao}. Simulation experiments illustrate that the improved fixed-point iterative method and the BB method are the comparative methods for QPAT in two cases.
description: 21 pages, 44 figures
SoK: Fully Homomorphic Encryption Accelerators
Creators: name: Zhang, Junxue
name: Cheng, Xiaodian
name: Yang, Liu
name: Hu, Jinbin
name: Liu, Ximeng
name: Chen, Kai
Publisher: name: arXiv
Year: 2022
Subjects: subject: Cryptography and Security (cs.CR)
subject: Hardware Architecture (cs.AR)
subject: FOS: Computer and information sciences

description: Fully Homomorphic Encryption~(FHE) is a key technology enabling privacy-preserving computing. However, the fundamental challenge of FHE is its inefficiency, due primarily to the underlying polynomial computations with high computation complexity and extremely time-consuming ciphertext maintenance operations. To tackle this challenge, various FHE accelerators have recently been proposed by both research and industrial communities. This paper takes the first initiative to conduct a systematic study on the 14 FHE accelerators -- cuHE/cuFHE, nuFHE, HEAT, HEAX, HEXL, HEXL-FPGA, 100$\times$, F1, CraterLake, BTS, ARK, Poseidon, FAB and TensorFHE. We first make our observations on the evolution trajectory of these existing FHE accelerators to establish a qualitative connection between them. Then, we perform testbed evaluations of representative open-source FHE accelerators to provide a quantitative comparison on them. Finally, with the insights learned from both qualitative and quantitative studies, we discuss potential directions to inform the future design and implementation for FHE accelerators.
The role of miR-134-5p in 7-ketocholesterol-induced human aortic endothelial dysfunction
Creators: name: Tong, Kind-Leng
name: Mahmood Zuhdi, Ahmad Syadi
name: Wong, Pooi-Fong
Publisher: name: IfADo - Leibniz Research Centre for Working Environment and Human Factors, Dortmund
Year: 2024
Subjects: miR-134-5p
7-ketocholesterol
endothelial dysfunction
human aortic endothelial cells

description: Atherosclerotic cardiovascular diseases are the leading causes of morbidity and mortality worldwide. In our previous study, a panel of miRNA including miR-134-5p was deregulated in young acute coronary syndrome (ACS) patients. However, the roles of these ACS-associated miRNAs in endothelial dysfunction, an early event preceding atherosclerosis, remain to be investigated. In the present study, human aortic endothelial cells (HAECs) were treated with 7-ketocholesterol (7-KC) to induce endothelial dysfunction. Following treatment with 20 g/ml 7-KC, miR-134-5p was significantly up-regulated and endothelial nitric oxide synthase (eNOS) expression was suppressed. Endothelial barrier disruption was evidenced by the deregulation of adhesion molecules including the activation of focal adhesion kinase (FAK), down-regulation of VE-cadherin, up-regulation of adhesion molecules (E-selectin and ICAM-1), increased expression of inflammatory genes (IL1B, IL6 and COX2) and AKT activation. Knockdown of miR-134-5p in 7-KC-treated HAECs attenuated the suppression of eNOS, the activation of AKT, the down-regulation of VE-cadherin and the up-regulation of E-selectin. In addition, the interaction between miR-134-5p and FOXM1 mRNA was confirmed by the enrichment of FOXM1 transcripts in the pull-down miRNA-mRNA complex. Knockdown of miR-134-5p increased FOXM1 expression whereas transfection with mimic miR-134-5p decreased FOXM1 protein expression. In summary, the involvement of an ACS-associated miRNA, miR-134-5p in endothelial dysfunction was demonstrated. Findings from this study could pave future investigations into utilizing miRNAs as a supplementary tool in ACS diagnosis or as targets for the development of therapeutics.
description: EXCLI Journal; 23:Doc1073; ISSN 1611-2156
Affecting the Technoscientific Body: Stem Cells, Wheeled-luggage and Emotions
Creators: name: Michael, Mike
Publisher: name: Tecnoscienza – Italian Journal of Science & Technology Studies
Year: 2011

description: In this paper, I will be treating the technoscientific body in terms of the emergence of emotion and emotion conventions, mainly by considering the role of affect. In this I want to pay attention to technoscience not only as a key site for the emergence of epistemic and ethical novelty, but also emotional novelty. In particular I want to focus on the role of the peculiar objects of technoscience whose affect upon bodies enables the emergence of peculiar, new emotions, and their conventionalization, that is the way in which such new emotions become warrantable. In all this I address the technoscientific body in two versions: on the one hand, there are the bodies of practicing stem cell scientists, and on the other there are the bodies of members of the public in the transport system non-places like airports and train stations.
description: Tecnoscienza – Italian Journal of Science & Technology Studies, Vol. 2 No. 1 (2011): Tecnoscienza Nr. 3
Stability and interacting $f(T,\mathcal{T})$ gravity with modified Chaplygin gas
Creators: name: Rezaei, T. Mirzaei
name: Amani, Alireza
Publisher: name: arXiv
Year: 2017
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In this paper, the model of interaction is studied between $f(T,\mathcal{T})$ gravity and modified Chaplygin gas in FRW-flat metric. We obtain the Friedmann equations in the framework of teleparallel gravity by vierbein field. We consider that Universe dominates by components of cold matter, dark energy and modified Chaplygin gas. In what follows we separately write the corresponding continuity equations for components of Universe. Also, dark energy EoS and effective EoS are obtained with respect to redshift, thereafter the corresponding cosmological parameters are plotted in terms of redshift, thereinafter the accelerated expansion of the Universe is investigated. Finally, the stability of the model is discussed in phase plane analysis.
description: 14 pages, 3 figures
Boundary-bulk relation in topological orders
Creators: name: Kong, Liang
name: Wen, Xiao-Gang
name: Zheng, Hao
Publisher: name: arXiv
Year: 2017
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Quantum Algebra (math.QA)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: In this paper, we study the relation between an anomaly-free $n+$1D topological order, which are often called $n+$1D topological order in physics literature, and its $n$D gapped boundary phases. We argue that the $n+$1D bulk anomaly-free topological order for a given $n$D gapped boundary phase is unique. This uniqueness defines the notion of the "bulk" for a given gapped boundary phase. In this paper, we show that the $n+$1D "bulk" phase is given by the "center" of the $n$D boundary phase. In other words, the geometric notion of the "bulk" corresponds precisely to the algebraic notion of the "center". We achieve this by first introducing the notion of a morphism between two (potentially anomalous) topological orders of the same dimension, then proving that the notion of the "bulk" satisfies the same universal property as that of the "center" of an algebra in mathematics, i.e. "bulk = center". The entire argument does not require us to know the precise mathematical description of a (potentially anomalous) topological order. This result leads to concrete physical predictions.
description: 14 pages, 12 figures, This paper gives a concise explanation of one of the main results in arXiv:1502.01690. We have tried to make it easier for physicists to read
The right not to use the internet
Creators: name: Kloza, Dariusz
Publisher: name: Zenodo
Year: 2023
Subjects: Internet governance
Human rights
Internet access
Digital divide
Non-use

description: Over the past years, while the use of the internet has accelerated, it has increasingly ceased to be a mere option. Rather, it has turned into a de facto obligation for anyone who exercises their rights or fulfils their duties. These developments invite the question as to whether and to what extent people could be forced to use the internet and whether such an obligation conforms to democratic standards.
From dynamical systems with time-varying delay to circle maps and Koopmanism
Creators: name: Müller, David
name: Otto, Andreas
name: Radons, Günter
Publisher: name: arXiv
Year: 2017
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: Dynamical Systems (math.DS)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: In the present paper we investigate the influence of the retarded access by a time-varying delay on the dynamics of delay systems. We show that there are two universality classes of delays, which lead to fundamental differences in dynamical quantities such as the Lyapunov spectrum. Therefore we introduce an operator theoretic framework, where the solution operator of the delay system is decomposed into the Koopman operator describing the delay access and an operator similar to the solution operator known from systems with constant delay. The Koopman operator corresponds to an iterated map, called access map, which is defined by the iteration of the delayed argument of the delay equation. The dynamics of this one-dimensional iterated map determines the universality classes of the infinite-dimensional state dynamics governed by the delay differential equation. In this way, we connect the theory of time-delay systems with the theory of circle maps and the framework of the Koopman operator. In the present paper we extend our previous work [Otto, Müller, and Radons, Phys. Rev. Lett. 118, 044104 (2017)], by elaborating the mathematical details and presenting further results also on the Lyapunov vectors.
description: 18 pages, 10 figures; minor revision due to review process
title: Friedensinitiative des 4. Internationalen Bauhauskolloquiums - Umweltgestaltung erfordert Friedenskampf
Creators: name: :None
Publisher: name: Bauhaus-Universität Weimar
Year: 2007
Subjects: subject: Bauhaus
subject: Kongress
subject: 720

description: Wissenschaftliches Kolloquium vom 24. bis 26. Juni 1986 in Weimar an der Hochschule für Architektur und Bauwesen zum Thema: 'Der wissenschaftlich-technische Fortschritt und die sozial-kulturellen Funktionen von Architektur und industrieller Formgestaltung in unserer Epoche'
description: Der wissenschaftlich-technische Fortschritt und die sozial-kulturelle Funktion von Architektur und industrieller Formgestaltung in unserer Epoche: 4. Internationales Bauhaus-Kolloquium Weimar 1986, vol. 33, 1987, no. 4-6, p. 188
description: Wissenschaftliche Zeitschrift der Hochschule für Architektur und Bauwesen Weimar, vol. 33, 1987, no. 4-6, p. 188
Design Things: Drawing Things Together and Making Things Public
Creators: name: Ehn, Pelle
Publisher: name: Tecnoscienza – Italian Journal of Science & Technology Studies
Year: 2011

description: This assemblage is based on the talk I gave at the EASST010 conference in Trento, Italy, September 03, 2010. It is composed of several kinds of materials. The ground structure is formed by the slides I showed at that occasion. These slides are commented in three different ways. Firstly by excerpts from the talk, secondly by comments added now when this assemblage is put together, and finally quotes from “Design Things”, the book manuscript around which the talk circulated.
description: Tecnoscienza – Italian Journal of Science & Technology Studies, Vol. 2 No. 1 (2011): Tecnoscienza Nr. 3
title: Georg von Wyss
title: [1816-1893]
titleType: Subtitle
Creators: name: (:Unkn) Unknown
Publisher: name: Zentralbibliothek Zürich
Year: 1893
Subjects: subject: 900 Geschichte und Geografie
subject: 920 Biografien, Genealogie, Insignien
subject: Nachruf
subject: Wyss, Georg von
subject: Zürich

description: Diverse Nachrufe aus Zeitungen und Zeitschriften
Cooperative Dynamics of Neighborhood Economic Status in Cities
Creators: name: Sahasranaman, Anand
name: Jensen, Henrik Jeldtoft
Publisher: name: arXiv
Year: 2017
Subjects: subject: Physics and Society (physics.soc-ph)
subject: FOS: Physical sciences

description: We significantly extend our earlier variant of the Schelling model, incorporating a neighborhood Potential function as well as an agent wealth gain function to study the long term evolution of the economic status of neighborhoods in cities. We find that the long term patterns of neighborhood relative economic status (RES) simulated by this model reasonably replicate the empirically observed patterns from American cities. Specifically, we find that larger fractions of rich and poor neighborhoods tend to, on average, retain status for longer than lower- and upper-middle wealth neighborhoods. The use of a Potential function that measures the relative wealth of neighborhoods as the basis for agent wealth gain and agent movement appears critical to explaining these emergent patterns of neighborhood RES. This also suggests that the empirically observed RES patterns could indeed be universal and that we would expect to see these patterns repeated for cities around the world. Observing RES behavior over even longer periods of time, the model predicts that the fraction of poor neighborhoods retaining status remains almost constant over extended periods of time, while the fraction of middle-wealth and rich neighborhoods retaining status reduces significantly over time, tending to zero.
description: 14 pages, 5 figures