cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
WQeMS - Newsletter IΙΙ
Creators: name: Manakos, Ioannis
Publisher: name: Zenodo
Year: 2022

description: We kindly welcome you to get acquainted with a Copernicus Service Evolution project within the Research and Innovation Action program of the H2020 framework. Being part of the cluster of projects for Space Research by the European Commission our working team is honored to inform you about the Copernicus Assisted Lake Water Quality Emergency Monitoring Service (WQeMS). In the previous newsletter (newsletter II) the services were presented, which are directly related to the increment of substances dissolution/ concentration in the water (water quality features changes, bloom events detection, extreme events detection) and their assets. In this newsletter, we are going to present the evolution of these services and their results in the pilot areas. The rest of the services (land-water transition zone change monitoring, alerting through reporting and crowdsourcing, and capacity building through the provision of training material and tools) will be highlighted in Newsletter IV. Follow us at our social media accounts and visit our website for more information: https://wqems.eu/
New constraints on dark matter from superconducting nanowires
Creators: name: Hochberg, Yonit
name: Lehmann, Benjamin V.
name: Charaev, Ilya
name: Chiles, Jeff
name: Colangelo, Marco
name: Nam, Sae Woo
name: Berggren, Karl K.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Superconductivity (cond-mat.supr-con)
subject: High Energy Physics - Experiment (hep-ex)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Superconducting nanowires, a mature technology originally developed for quantum sensing, can be used as a target and sensor with which to search for dark matter interactions with electrons. Here we report on a 180-hour measurement of a tungsten silicide superconducting nanowire device with a mass of 4.3 nanograms. We use this to place new constraints on dark matter--electron interactions, including the strongest terrestrial constraints to date on sub-MeV (sub-eV) dark matter that interacts with electrons via scattering (absorption) processes.
description: 5 pages + appendices, 5 figures. Matched published version
Cosas que nadie te contó (y te habría gustado saber) en tu carrera investigadora
Creators: name: Hurtado, Maria
name: Martínez, Carlos
Publisher: name: figshare
Year: 2024
Subjects: classificationCode: 440710
subject: Research, science and technology policy

description: Recursos creados desde la comisión de investigadores en etapas tempranas de la carrera, de la Asociación Española de Ecología Terrestre (AEET). En este recurso, creado colectivamente por los socios de la AEET, se comparten consejos generales o específicos que podrían ayudas a compañeros científicos.
Complex critical points and curved geometries in four-dimensional Lorentzian spinfoam quantum gravity
Creators: name: Han, Muxin
name: Huang, Zichang
name: Liu, Hongguang
name: Qu, Dongxue
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: This paper focuses on the semiclassical behavior of the spinfoam quantum gravity in 4 dimensions. There has been long-standing confusion, known as the flatness problem, about whether the curved geometry exists in the semiclassical regime of the spinfoam amplitude. The confusion is resolved by the present work. By numerical computations, we explicitly find curved Regge geometries from the large-$j$ Lorentzian Engle-Pereira-Rovelli-Livine (EPRL) spinfoam amplitudes on triangulations. These curved geometries are with small deficit angles and relate to the complex critical points of the amplitude. The dominant contribution from the curved geometry to the spinfoam amplitude is proportional to $e^{i \mathcal{I}}$, where $\mathcal{I}$ is the Regge action of the geometry plus corrections of higher order in curvature. As a result, the spinfoam amplitude reduces to an integral over Regge geometries weighted by $e^{i \mathcal{I}}$ in the semiclassical regime. As a byproduct, our result also provides a mechanism to relax the cosine problem in the spinfoam model. Our results provide important evidence supporting the semiclassical consistency of the spinfoam quantum gravity.
description: 5 pages, 12 pages appendix, 4 figures, ILQGS talk: https://tigers.phys.lsu.edu/relativity/ilqgs/qu100521.mp4
Operatsioonieelse paastu tänapäevane käsitlus
Creators: name: Stepanov, Dmitri
Publisher: name: Eesti Arst
Year: 2020

description: Operatsioonieelne paast on plaanilises kirurgias kasutatav ravivõte, millega soovitakse ära hoida suhteliselt harva esinev, aga potentsiaalselt ohtlik anesteesiatüsistus – maosisu aspiratsioon hingamisteedesse. Preoperatiivne paast peab olema võimalikult lühike, et vähendada patsientide ebamugavust ja vältida dehüdratatsiooni teket, samas piisavalt pikk, et tagada anesteesia ohutus. Soovituslik operatsioonieelse paastu kestus on tahke toidu ja vedelike puhul erinev, samuti on teatud erisusi laste puhul. Viimase aja soovitused vedelike tarvitamise kohta operatsiooni eel on võrreldes varasematega oluliselt vabameelsemad, tagades patsientidele paastu kergema talumise ja parema enesetunde.
description: Eesti Arst, 2020: Mai
Bayesian analysis of CCDM Models
Creators: name: Jesus, J. F.
name: Valentim, R.
name: Andrade-Oliveira, F.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Creation of Cold Dark Matter (CCDM), in the context of Einstein Field Equations, leads to negative creation pressure, which can be used to explain the accelerated expansion of the Universe. In this work we tested six different spatially flat models for matter creation using statistical tools, at light of SN Ia data: Akaike Information Criterion (AIC), Bayesian Information Criterion (BIC) and Bayesian Evidence (BE). These approaches allow to compare models considering goodness of fit and number of free parameters, penalizing excess of complexity. We find that JO model is slightly favoured over LJO/$Λ$CDM model, however, neither of these, nor $Γ=3αH_0$ model can be discarded from the current analysis. Three other scenarios are discarded either from poor fitting, either from excess of free parameters.
description: 16 pages, 6 figures, 6 tables. Corrected some text and language in new version
Stabilization of Spatiotemporal Dissipative Solitons in Multimode Fiber Lasers by External Phase Modulation
Creators: name: Kalashnikov, Vladimir L.
name: Wabnitz, Stefan
Publisher: name: arXiv
Year: 2021
Subjects: subject: Optics (physics.optics)
subject: Pattern Formation and Solitons (nlin.PS)
subject: FOS: Physical sciences

description: In this work, we introduce a method for stabilizing spatiotemporal solitons. These solitons correspond to light bullets in multimode optical fiber lasers, energy-scalable waveguide oscillators and amplifiers, localized coherent patterns in Bose-Einstein condensates, etc. We show that a three-dimensional confinement potential, formed by a spatial transverse (radial) parabolic graded refractive index and dissipation profile, combined with quadratic temporal phase modulation, may permit the generation of stable spatiotemporal dissipative solitons. This corresponds to combining phase mode-locking with the distributed Kerr-lens mode-locking. Our study of the soliton characteristics and stability is based on analytical and numerical solutions of the generalized dissipative Gross-Pitaevskii equation. This approach could lead to higher energy (or condensate mass) harvesting in coherent spatio-temporal beam structures formed in multimode fiber lasers, waveguide oscillators, and weakly-dissipative Bose-Einstein condensates.
description: 14 pages, 19 figures
Lefschetz Thimble Quantum Monte Carlo for Spin Systems
Creators: name: Mooney, T. C.
name: Bringewatt, Jacob
name: Warrington, Neill C.
name: Brady, Lucas T.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: Monte Carlo simulations are useful tools for modeling quantum systems, but in some cases they suffer from a sign problem, leading to an exponential slow down in their convergence to a value. While solving the sign problem is generically NP-hard, many techniques exist for mitigating the sign problem in specific cases; in particular, the technique of deforming the Monte Carlo simulation's plane of integration onto Lefschetz thimbles (complex hypersurfaces of stationary phase) has seen significant success in the context of quantum field theories. We extend this methodology to spin systems by utilizing spin coherent state path integrals to re-express the spin system's partition function in terms of continuous variables. Using some toy systems, we demonstrate its effectiveness at lessening the sign problem in this setting, despite the fact that the initial mapping to spin coherent states introduces its own sign problem. The standard formulation of the spin coherent path integral is known to make use of uncontrolled approximations; despite this, for large spins they are typically considered to yield accurate results, so it is somewhat surprising that our results show significant systematic errors. Therefore, possibly of independent interest, our use of Lefschetz thimbles to overcome the intrinsic sign problem in spin coherent state path integral Monte Carlo enables a novel numerical demonstration of a breakdown in the spin coherent path integral.
description: 11 pages, 5 figures
Intermittency analysis in relativistic heavy-ion collisions
Creators: name: Li, Zhiming
name: Wu, Jin
Publisher: name: arXiv
Year: 2021
Subjects: subject: Nuclear Theory (nucl-th)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: Local density fluctuations near the QCD critical point can be probed by an intermittency analysis of power-law behavior on scaled factorial moments in relativistic heavy-ion collisions. We study the second-order scaled factorial moment in Au + Au collisions at $\sqrt{s_\mathrm{NN}}$ = 7.7-200 GeV from the UrQMD model. Since the background subtraction and efficiency correction are two important aspects in this measurement, we propose a cumulative variable method to remove background contribution and a cell-by-cell method for efficiency correction in the intermittency analysis.
description: 5 pages, 3 figures, contribution to ISMD2021 12-16 July 2021, modified according to the journal requirement
Äge müeloidleukeemia
Creators: name: Valter, Epp
name: Palk, Katrin
Publisher: name: Eesti Arst
Year: 2020

description: Äge müeloidleukeemia on geneetiliselt, fenotüübiliselt ja prognostiliselt heterogeenne vereloome tüvirakkude haigus, mida on seni ravitud tavapärase keemiaravi ja allogeensete tüvirakkude siirdamisega. Viimase kahe aastakümne jooksul on molekulaarsete tehnikate tohutu areng võimaldanud avastada ägeda müeloidleukeemia patsientidel suurel hulgal molekulaarseid kõrvalekaldeid, oluliselt on edenenud arusaamad haiguse patofüsioloogiast ja riskidest, võimalik on haiguse submikroskoopiline jälgimine. Uued teadmised võimaldavad välja töötada personaliseeritud ravimeetodeid.
description: Eesti Arst, 2020: Mai
Three-nucleon forces and superfluidity in neutron matter
Creators: name: Papakonstantinou, P.
name: Clark, J. W.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Nuclear Theory (nucl-th)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: The existence of superfluidity of the neutron component in the core of a neutron star, associated specifically with triplet $P-$wave pairing, is currently an open question that is central to interpretation of the observed cooling curves and other neutron-star observables. Ab initio theoretical calculations aimed at resolving this issue face unique challenges in the relevant high-density domain, which reaches beyond the saturation density of symmetrical nuclear matter. These issues include uncertainties in the three-nucleon (3N) interaction and in the effects of strong short-range correlations -- and more generally of in-medium modification of nucleonic self-energies and interactions. A survey of existing solutions to the gap equations in the triplet channel shows that the separate or combined impacts of 3N forces, coupled channels, and mass renormalization range from moderate to strong to devastating, thus motivating a detailed analysis of the competing effects. In the present work we track the effects of the 3N force and in-medium modifications in the representative case of the $^3P_2$ channel, based on the Argonne V18 two-nucleon (2N) interaction supplemented by 3N interactions of the Urbana IX family. Sensitivity of the results to the input interaction is clearly demonstrated, while consistency issues arise with respect to the simultaneous treatment of 3N forces and in-medium effects. We consider this pilot study as the first step towards a systematic and comprehensive exploration of coupled-channel $^3P F_2$ pairing using a broad range of 2N and 3N interactions from the current generation of refined semi-phenomenological models and models derived from chiral effective field theory.
description: 17 pages, incl. 6 figures; intended for a special issue of the Journal of Low Temperature Physics on superfluidity and pairing phenomena
Resource theory of quantum uncomplexity
Creators: name: Halpern, Nicole Yunger
name: Kothakonda, Naga B. T.
name: Haferkamp, Jonas
name: Munson, Anthony
name: Eisert, Jens
name: Faist, Philippe
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Quantum complexity is emerging as a key property of many-body systems, including black holes, topological materials, and early quantum computers. A state's complexity quantifies the number of computational gates required to prepare the state from a simple tensor product. The greater a state's distance from maximal complexity, or "uncomplexity," the more useful the state is as input to a quantum computation. Separately, resource theories -- simple models for agents subject to constraints -- are burgeoning in quantum information theory. We unite the two domains, confirming Brown and Susskind's conjecture that a resource theory of uncomplexity can be defined. The allowed operations, fuzzy operations, are slightly random implementations of two-qubit gates chosen by an agent. We formalize two operational tasks, uncomplexity extraction and expenditure. Their optimal efficiencies depend on an entropy that we engineer to reflect complexity. We also present two monotones, uncomplexity measures that decline monotonically under fuzzy operations, in certain regimes. This work unleashes on many-body complexity the resource-theory toolkit from quantum information theory.
description: Published version
Light propagation in a plasma on Kerr spacetime: Separation of the Hamilton-Jacobi equation and calculation of the shadow
Creators: name: Perlick, Volker
name: Tsupko, Oleg Yu.
Publisher: name: arXiv
Year: 2017
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We consider light propagation in a non-magnetized pressureless plasma around a Kerr black hole. We find the necessary and sufficient condition the plasma electron density has to satisfy to guarantee that the Hamilton-Jacobi equation for the light rays is separable, i.e., that a generalized Carter constant exists. For all cases where this condition is satisfied we determine the photon region, i.e., the region in the spacetime where spherical light rays exist. A spherical light ray is a light ray that stays on a sphere $r = \mathrm{constant}$ (in Boyer-Lindquist coordinates). Based on these results, we calculate the shadow of a Kerr black hole under the influence of a plasma that satisfies the separability condition. More precisely, we derive an analytical formula for the boundary curve of the shadow on the sky of an observer that is located anywhere in the domain of outer communication. Several examples are worked out.
description: 19 pages, 6 figures; minor reformulations
CCAT-prime: Characterization of the First 280 GHz MKID Array for Prime-Cam
Creators: name: Choi, Steve K.
name: Duell, Cody J.
name: Austermann, Jason
name: Cothard, Nicholas F.
name: Gao, Jiansong
name: Freundt, Rodrigo G.
name: Groppi, Christopher
name: Herter, Terry
name: Hubmayr, Johannes
name: Huber, Zachary B.
name: Keller, Ben
name: Li, Yaqiong
name: Mauskopf, Phillip
name: Niemack, Michael D.
name: Nikola, Thomas
name: Rossi, Kayla
name: Sinclair, Adrian
name: Stacey, Gordon J.
name: Vavagiakis, Eve M.
name: Vissers, Michael
name: Tucker, Carole
name: Weeks, Eric
name: Wheeler, Jordan
Publisher: name: arXiv
Year: 2021
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: The Prime-Cam receiver on the Fred Young Submillimeter Telescope for the CCAT-prime project aims to address important astrophysical and cosmological questions with sensitive broadband, polarimetric, and spectroscopic measurements. The primary frequency bands in development include 280, 350, and 850 GHz for the polarization-sensitive broadband channels and 210--420 GHz for the spectrometers. Microwave kinetic inductance detectors (MKIDs) are a natural choice of detector technology for the simplicity in multiplexed readout needed for large format arrays at these high frequencies. We present here the initial lab characterization of the feedhorn-coupled 280 GHz polarimetric MKID array, and outline the plans for the subsequent MKID arrays and the development of the testbed to characterize them.
description: Version accepted for publication by the Journal of Low Temperature Physics
Adaptive Control of Underactuated Planar Pronking Hexapod
Creators: name: Er, Güner Dilşad
name: Ankaralı, Mustafa Mert
Publisher: name: arXiv
Year: 2021
Subjects: subject: Robotics (cs.RO)
subject: FOS: Computer and information sciences

description: Underactuated legged robots depict highly nonlinear and complex dynamical behaviors that create significant challenges in accurately modeling system dynamics using both first principles and system identification approaches. Hence, it makes a more substantial challenge to design stabilizing controllers. If physical parameters on mathematical models have miscalibrations due to uncertainty in identifying and modeling processes, designed controllers could perform poorly or even result in unstable responses. Moreover, these parameters can certainly change-over-time due to operation and environmental conditions. In that respect, analogous to a living organism modifying its behavior in response to novel conditions, adapting/updating system parameters, such as spring constant, to compensate for modeling errors could provide the advantage of constructing a stable gait level controller without needing "exact" dynamical parameter values. This paper presents an online, model-based adaptive control approach for an underactuated planar hexapod robot's pronking behavior adopted from antelope species. We show through systematic simulation studies that the adaptive control policy is robust to high levels of parameter uncertainties compared to a non-adaptive model-based dead-beat controller.
description: 19 pages, 17 figures
The variance of the locally measured Hubble parameter explained with different estimators
Creators: name: Odderskov, Io
name: Hannestad, Steen
name: Brandbyge, Jacob
Publisher: name: arXiv
Year: 2017
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We study the expected variance of measurements of the Hubble constant, $H_0$, as calculated in either linear perturbation theory or using non-linear velocity power spectra derived from $N$-body simulations. We compare the variance with that obtained by carrying out mock observations in the N-body simulations, and show that the estimator typically used for the local Hubble constant in studies based on perturbation theory is different from the one used in studies based on N-body simulations. The latter gives larger weight to distant sources, which explains why studies based on N-body simulations tend to obtain a smaller variance than that found from studies based on the power spectrum. Although both approaches result in a variance too small to explain the discrepancy between the value of $H_0$ from CMB measurements and the value measured in the local universe, these considerations are important in light of the percent determination of the Hubble constant in the local universe.
description: 16 pages, 5 figures. v2: Minor corrections in text; results unchanged
ANAd – tuumaantikehad kui olulisim grupp diagnostilise väärtusega autoantikehi
Creators: name: Aunap, Sander
name: Metsküla, Kaja
name: Uibo, Raivo
Publisher: name: Eesti Arst
Year: 2020

description: Tuumavastaste antikehade (ANAd, anti-nuclear antibodies) määramine on abiks mitmete autoimmuunsete haiguste diagnoosimisel. Autoimmuunsuse serodiagnostika arengus on olnud oluline saavutada konsensus kaudsel immunofluorestsentstestil esinevate ANAde reaktsioonimustrite kohta. Erinevad reaktsioonimustrid viitavad erinevatele põhjuslikele antikehadele ja haigusseisunditele. Sageli tuvastatakse ANAd ka näiliselt tervetel isikutel või mittereumaatiliste haiguste korral. Mõned reaktsioonimustrid ja autoantikehad võivad vähendada kahtlust autoimmuunse reumaatilise haiguse suhtes. Tähelepanu on pööratud DFS70-vastaste autoantikehade negatiivsele seosele ANA-seoseliste autoimmuunsete reumaatiliste haigustega.
description: Eesti Arst, 2020: Mai
Vertex distortion detects the unknot
Creators: name: Campisi, Marion
name: Cazet, Nicholas
name: Crncevic, David
name: Fellman, Tasha
name: Kessler, Phillip
name: Rieke, Nikolas
name: Srivastava, Vatsal
name: Torres, Luis
Publisher: name: arXiv
Year: 2021
Subjects: subject: Geometric Topology (math.GT)
subject: FOS: Mathematics

description: The first two authors introduced vertex distortion and showed that the vertex distortion of the unknot is trivial. It was conjectured that the vertex distortion of a knot is trivial if and only if the knot is trivial. We will use Denne-Sullivan's bound on Gromov distortion to bound the vertex distortion of nontrivial lattice knots. We will then conclude that trivial vertex distortion implies the unknot, proving the conjecture. Additionally, the first conjecture in vertex distortion's debut article is proven and a vertex distortion calculator is given.
description: 12 pages, 6 figures
Brillouin elastography in horticultural sciences: impact of D. rosea on rose leaves biomechanics
Creators: name: Landes, Timm
name: Debener, Thomas
name: Heinemann, Dag
Publisher: name: Dresden : TU Dresden
Year: 2022
Subjects: subject: biomechanics
subject: Brillouin spectroscopy
subject: plant science
subject: rose blackspot
subject: Konferenzschrift
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: Using Brillouin light scattering spectroscopy as a non-destructive, label-free method to determine the effects on leave biomechanics after inoculation of Diplocarpon rosea in two different resistive rose genotypes.
Additional file 1 of Comparative safety and effectiveness of cryoballoon versus radiofrequency ablation for atrial fibrillation: a systematic review and meta-analysis
Creators: name: Furqan, Muhammad
name: Raza, Ifrah Inbisat
name: Younus, Shaheera
name: Fatima, Hareer
name: Azhar, Hiba
name: Fatima, Sania Kaneez
name: Ali, Laiba
name: Khan, Sara
name: Ellahi, Aayat
Publisher: name: figshare
Year: 2025
Subjects: subject: Medicine
subject: Immunology
subject: FOS: Clinical medicine
subject: Science Policy

description: Additional file 1
Los Derechos Humanos Y Las Personas Privadas De La Libertad: Brechas Entre El Idealismo Normativo Y Las Realidades Sociales
Creators: name: Meola, Anuar
Publisher: name: figshare
Year: 2024
Subjects: classificationCode: 480307
subject: International humanitarian and human rights law
classificationCode: 500104
subject: Human rights and justice issues (excl. law)
classificationCode: 449999
subject: Other human society not elsewhere classified

description: This essay deals with the gap between normative idealism and social reality regarding the human rights of persons deprived of their liberty. In turn, you will see a brief description of the relevant human rights that these persons deserve to receive, as well as the international organizations and treaties that embrace and support all these rights.*Please note: the original essay is in Spanish and is my own. I attach its English translation for informational purposes and, if you are interested, you can quote from it.
Uute tehnoloogiliste lahenduste kasutamine laste neurorehabilitatsioonis
Creators: name: Kolk, Anneli
Publisher: name: Eesti Arst
Year: 2020

description: Arvutipõhise keskkonna kasutamine on laste taastusravis uus kiiresti arenev valdkond. See on ohutu ja huvitav ning võimaldab närvisüsteemi kahjustusega lastel praktiseerida vajalikke sotsiaalseid ja kognitiivseid oskusi. Tänapäeval on võimalik kombineerida erinevaid arvutipõhiseid sekkumismeetodeid parima ravitulemuse saamiseks. Uuteks meetoditeks on puutetundliku tehnoloogia, virtuaal- ja liitreaalsuse ning suhtlemisrobotite kasutamine treeningprotsessis.
description: Eesti Arst, 2020: Mai
Quantum autoencoders for efficient compression of quantum data
Creators: name: Romero, Jonathan
name: Olson, Jonathan P.
name: Aspuru-Guzik, Alan
Publisher: name: arXiv
Year: 2016
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Classical autoencoders are neural networks that can learn efficient low dimensional representations of data in higher dimensional space. The task of an autoencoder is, given an input $x$, is to map $x$ to a lower dimensional point $y$ such that $x$ can likely be recovered from $y$. The structure of the underlying autoencoder network can be chosen to represent the data on a smaller dimension, effectively compressing the input. Inspired by this idea, we introduce the model of a quantum autoencoder to perform similar tasks on quantum data. The quantum autoencoder is trained to compress a particular dataset of quantum states, where a classical compression algorithm cannot be employed. The parameters of the quantum autoencoder are trained using classical optimization algorithms. We show an example of a simple programmable circuit that can be trained as an efficient autoencoder. We apply our model in the context of quantum simulation to compress ground states of the Hubbard model and molecular Hamiltonians.
description: 10 pages, 9 figures
Obstructed surface states as the origin of catalytic activity in inorganic heterogeneous catalysts
Creators: name: Li, Guowei
name: Xu, Yuanfeng
name: Song, Zhida
name: Yang, Qun
name: Gupta, Uttam
name: Sü\b{eta}, Vicky
name: Sun, Yan
name: Sessi, Paolo
name: Parkin, Stuart S. P.
name: Bernevig, B. Andrei
name: Felser, Claudia
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The discovery of new catalysts that are efficient, sustainable, and low-cost is a major research endeavor for many industrial chemical processes. This requires an understanding and determination of the catalytic origins for the given catalysts, which still remains a challenge. Here we describe a novel method to identify new catalysts based on searching for crystalline symmetry-protected obstructed atomic insulators (OAIs) that have metallic surface states on otherwise semiconducting or insulating compounds. The Wannier charge centers in OAIs are pinned by symmetries at some empty Wyckoff positions so that surfaces that accommodate these sites are guaranteed to have metallic obstructed surface states (OSSs). Beyond the well-studied 2H-MoS2, we further verified our theory on the catalysts, 2H-MoTe2, and 1T'-MoTe2, whose catalytic active sites are consistent with our calculations of obstructed Wannier charge centers (OWCCs) and OSSs. In addition, we have predicted the location of catalytic active sites and confirmed these predictions by exploring the hydrogen evolution reaction on NiPS3 bulk single crystals, which we find to be one of the most promising new catalysts with high activity and, moreover, of low cost. Most importantly, we successfully identified several high-efficient catalysts just by considering the number of OWCCs and the crystal symmetry of the OAIs. Using the real space invariant theory and high-throughput computational methods applied to a database of 34013 topologically trivial insulators, we have identified 1788 unique OAIs (3383 ICSDs), of which 465 are potential high-quality catalysts for heterogeneous reactions. The Miller indices of the active surfaces are also obtained. Our new methodology will facilitate and accelerate the discovery of new catalysts for a wide range of heterogeneous redox reactions, where sustainability, toxicity, and cost must be considered.
description: 17+26 pages, 4+14 figures. See also "Three-Dimensional Real Space Invariants, Obstructed Atomic Insulators and A New Principle for Active Catalytic Sites", Yuanfeng Xu et al
Completion of the universal I-Love-Q relations in compact stars including the mass
Creators: name: Reina, Borja
name: Sanchis-Gual, Nicolas
name: Vera, Raül
name: Font, José A.
Publisher: name: arXiv
Year: 2017
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: In a recent paper we applied a rigorous perturbed matching framework to show the amendment of the mass of rotating stars in Hartle's model. Here, we apply this framework to the tidal problem in binary systems. Our approach fully accounts for the correction to the Love numbers needed to obtain the universal $I$-Love-$Q$ relations. We compute the corrected mass vs radius configurations of rotating quark stars, revisiting a classical paper on the subject. These corrections allow us to find a universal relation involving the second-order contribution to the mass $δM$. We thus complete the set of universal relations for the tidal problem in binary systems, involving four perturbation parameters, namely $I$, Love, $Q$, and $δM$. These relations can be used to obtain the perturbation parameters directly from observational data.
description: 6 pages, 2 figures. Accepted for publication in MNRAS
Towards MHz OCT for vocal cord imaging in the awake patient
Creators: name: Zabic, Miroslav
name: Napier, James W.
name: Müller-Wirts, Lennart
name: Neubronner, Paul
name: Sharifpourboushehri, Sara
name: Johannsmeier, Sonja
name: Neu, Walter
name: Heinemann, Dag
name: Heisterkamp, Alexander
name: Ripken, Tammo
Publisher: name: Dresden : TU Dresden
Year: 2022
Subjects: subject: MHz OCT
subject: Laryngoscopy
subject: Konferenzschrift
subject: Dewey Decimal Classification::600 | Technik::620 | Ingenieurwissenschaften und Maschinenbau

description: Laryngeal OCT imaging is challenging due to anatomy-dependent vocal cord position and motion artifacts caused by movements of patient and physician. We present a MHz OCT laryngoscope with variable working distance
Toward A Supersymmetric $w_{1+\infty}$ Symmetry in the Celestial Conformal Field Theory
Creators: name: Ahn, Changhyun
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The $w_{1+\infty}$ symmetry algebra appears in the Einstein--Yang--Mills theory, proposed recently by Strominger. In this paper, we derive the supersymmetric $w_{1+\infty}$ symmetry by using the known results on the operator product expansions (OPEs) between the graviton, gravitino, gluon, and gluino in the supersymmetric version of the above theory. We calculate the four additional commutator relations between the soft currents explicitly. In addition, we analyze the works of Odake et al. and Pope et al. and introduce the additional symmetry current that corresponds to the celestial gluino operator. Through this procedure, all seven commutator relations can be connected to the ones associated with the supersymmetric $w_{1+\infty}$ algebra with $SU(N)$ symmetry under the restrictions of wedge modes.
description: 24 pages; Some of main texts are moved to the footnotes, some typos are corrected, the introduction is improved and to appear in PRD
Detection of Molecular Transitions with Nitrogen-Vacancy Centers and Electron-Spin Labels
Creators: name: Munuera-Javaloy, C.
name: Puebla, R.
name: D'Anjou, B.
name: Plenio, M. B.
name: Casanova, J.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We present a protocol that detects molecular conformational changes with two nitroxide electron-spin labels and a nitrogen-vacancy (NV) center in diamond. More specifically, we demonstrate that the NV can detect energy shifts induced by the coupling between electron-spin labels. The protocol relies on the judicious application of microwave and radiofrequency pulses in a range of parameters that ensures stable nitroxide resonances. Furthermore, we demonstrate that our scheme is optimized by using nitroxides with distinct nitrogen isotopes. We use detailed numerical simulations and Bayesian inference techniques to demonstrate that our method enables the detection of conformational changes under realistic conditions including strong NV dephasing rates as a consequence of the diamond surface proximity and nitroxide thermalization mechanisms. Finally, we show that random molecular tumbling can be exploited to extract the inter-label distance.
description: 6 pages plus supplemental material
Probing topology by "heating": Quantized circular dichroism in ultracold atoms
Creators: name: Tran, D. T.
name: Dauphin, A.
name: Grushin, A. G.
name: Zoller, P.
name: Goldman, N.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: We reveal an intriguing manifestation of topology, which appears in the depletion rate of topological states of matter in response to an external drive. This phenomenon is presented by analyzing the response of a generic 2D Chern insulator subjected to a circular time-periodic perturbation: due to the system's chiral nature, the depletion rate is shown to depend on the orientation of the circular shake. Most importantly, taking the difference between the rates obtained from two opposite orientations of the drive, and integrating over a proper drive-frequency range, provides a direct measure of the topological Chern number of the populated band ($ν$): this "differential integrated rate" is directly related to the strength of the driving field through the quantized coefficient $η_0\!=\!ν/\hbar^2$. Contrary to the integer quantum Hall effect, this quantized response is found to be non-linear with respect to the strength of the driving field and it explicitly involves inter-band transitions. We investigate the possibility of probing this phenomenon in ultracold gases and highlight the crucial role played by edge states in this effect. We extend our results to 3D lattices, establishing a link between depletion rates and the non-linear photogalvanic effect predicted for Weyl semimetals. The quantized circular dichroism revealed in this work designates depletion-rate measurements as a universal probe for topological order in quantum matter.
description: 10 pages, 5 figures (including Sup. Mat.). Revised version, accepted for publication
Einzige Beamer-Präsentation von Christof Arn, Leiter Zentrum für Lernen und Lehren
Creators: name: Christof Arn
Publisher: name: Zenodo
Year: 2018
Subjects: agile teaching
agile organisation
teaching and learning
education
university

description: At the conclusion of seven years as head of the Center for Learning and Teaching at the Lucerne University of Applied Sciences and Arts, Christof Arn's one and only beamer presentation took place at the last "Bildungsbier" event.
Cascaded cold atomic ensembles in a diamond configuration as a spectrally entangled multiphoton source
Creators: name: Jen, H. H.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We theoretically investigate the spectral entanglement of a multiphoton source generated from the cascade emissions in the cascaded cold atomic ensembles.\ This photon source is highly directional, guaranteed under the four-wave mixing condition, and is also highly frequency-correlated due to finite driving pulse durations and superradiant decay constants.\ We utilize Schmidt decomposition to study the bipartite entanglement of the biphoton states projected from the multiphoton ones.\ This entropy of entanglement can be manipulated by controlling the driving parameters and superradiant decay rates.\ Moreover the projected biphoton states in the cascaded scheme can have larger entanglement than the one produced from only one atomic ensemble, which results from larger capacity in multipartite entanglement.\ This cascaded scheme enables a multiphoton source useful in quantum information processing.\ It also allows for potential applications in multimode quantum communication and spectral shaping of high-dimensional continuous frequency entanglement.
description: 6 figures
Hematoloogilise automaatuuringu referentsväärtused Eesti täiskasvanutel
Creators: name: Tomberg, Karel
name: Kool, Pille
name: Lind, Ellind
name: Jerjomina, Jelena
name: Tuttelberg, Katrin
name: Tomberg, Kärt
name: Barotov, Oleg
name: Kedars, Piret
name: Pulk, Ruth
name: Leedo, Sirje
name: Saarniit, Erna
name: Salum, Tiit
name: Pikta, Marika
name: Nimel, Eesti Laborimeditsiini Ühingu (ELMÜ) Laboratoorse Hematoloogia Töörühma
Publisher: name: Eesti Arst
Year: 2020

description: Taust ja eesmärk. Hematoloogiline automaatuuring (hemogramm) on üks kõige sagedasemaid uuringuid meditsiinilaboris. Kuigi paljudes Eesti laborites on hemogrammi uurimiseks kasutusel sama tootjafirma analüsaatorid, on referentsväärtused enamasti erinevad. Uuringu eesmärk oli välja töötada ühtsed hemogrammi populatsioonipõhised referentsväärtused Eesti täiskasvanutele. Metoodika. Referentsisikuteks kutsuti terved isikud ja vabatahtlikud esmased veredoonorid, kel ei esinenud kroonilisi haigusi ja kes ei tarvitanud ravimeid. Uuringumaterjaliks oli EDTA-veri. Proovid koguti neljas raviasutuses ja analüüsiti 3 tunni jooksul Sysmex XE- ja XN-seeria analüsaatoritel. Arvesse võeti ilma analüsaatori veateadeteta tulemused. Vereproovide põhjal ei tohtinud uuritaval olla põletikku ega latentset rauapuudust. Referentsvahemike leidmiseks kasutati mitteparameetrilist järkude meetodit, arvutati 90% usaldusvahemikud referentspiiridele. Tulemused. Analüüsiti 314 asümptomaatilise isiku vereproove, millest pärast väljaarvamiskriteeriumite rakendamist saadi andmeanalüüsiks 259 isiku tulemused (127 naist ja 132 meest). Leiti referentsvahemikud ja usalduspiirid järgmistele parameetritele: RBC (erütrotsüüdid), Hb (hemoglobiin), Hct (hematokrit), MCV (erütrotsüütide keskmine maht), MCH (keskmine hemoglobiini hulk erütrotsüüdis), MCHC (keskmine hemoglobiini kontsentratsioon erütrotsüüdis), RDW (erütrotsüütide suurusjaotuvus), Plt (trombotsüüdid), MPV (trombotsüütide keskmine maht), Pct (trombokrit), P-LCR (trombotsüütide suurte vormide suhtarv), PDW (trombotsüütide suurusjaotuvus), IPF (ebaküpsete trombotsüütide suhtarv), WBC (leukotsüüdid), IG# (ebaküpsed granulotsüüdid), Neut# (neutrofiilid), Lymph# (lümfotsüüdid), Mono# (monotsüüdid), Baso# (basofiilid), Eo# (eosinofiilid). Järeldused. Töötati välja Eesti täiskasvanute ühtsed populatsioonipõhised hemogrammi referentsväärtused. Uuringu tulemused võimaldavad referentsväärtusi laborites ühtlustada, et aidata kaasa patsiendi hemogrammi tulemuste täpsemale tõlgendamisele.
description: Eesti Arst, 2020: Mai
Automated generation of 0D and 1D reduced-order models of patient-specific blood flow
Creators: name: Pfaller, Martin R.
name: Pham, Jonathan
name: Verma, Aekaansh
name: Pegolotti, Luca
name: Wilson, Nathan M.
name: Parker, David W.
name: Yang, Weiguang
name: Marsden, Alison L.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computational Engineering, Finance, and Science (cs.CE)
subject: FOS: Computer and information sciences

description: Three-dimensional (3D) cardiovascular fluid dynamics simulations typically require hours to days of computing time on a high-performance computing cluster. One-dimensional (1D) and lumped-parameter zero-dimensional (0D) models show great promise for accurately predicting blood bulk flow and pressure waveforms with only a fraction of the cost. They can also accelerate uncertainty quantification, optimization, and design parameterization studies. Despite several prior studies generating 1D and 0D models and comparing them to 3D solutions, these were typically limited to either 1D or 0D and a singular category of vascular anatomies. This work proposes a fully automated and openly available framework to generate and simulate 1D and 0D models from 3D patient-specific geometries, automatically detecting vessel junctions and stenosis segments. Our only input is the 3D geometry; we do not use any prior knowledge from 3D simulations. All computational tools presented in this work are implemented in the open-source software platform SimVascular. We demonstrate the reduced-order approximation quality against rigid-wall 3D solutions in a comprehensive comparison with N=72 publicly available models from various anatomies, vessel types, and disease conditions. Relative average approximation errors of flows and pressures typically ranged from 1% to 10% for both 1D and 0D models, measured at the outlets of terminal vessel branches. In general, 0D model errors were only slightly higher than 1D model errors despite requiring only a third of the 1D runtime. Automatically generated ROMs can significantly speed up model development and shift the computational load from high-performance machines to personal computers.
Approximate Isotropic Cloak for the Maxwell equations
Creators: name: Ghosh, Tuhin
name: Tarikere, Ashwin
Publisher: name: arXiv
Year: 2017
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics
subject: 35B27, 35Q60, 78A25, 35R30

description: We construct a regular isotropic approximate cloak for the Maxwell system of equations. The method of transformation optics has enabled the design of electromagnetic parameters that cloak a region from external observation. However, these constructions are singular and anisotropic, making practical implementation difficult. Thus, regular approximations to these cloaks have been constructed that cloak a given region to any desired degree of accuracy. In this paper, we show how to construct isotropic approximations to these regularized cloaks using homogenization techniques, so that one obtains cloaking of arbitrary accuracy with regular and isotropic parameters.
description: Added references, corrected typos
Anowar's Handbook on Microprocessor, Robotics and Control Engineering
Creators: name: Hossain, Anowar
Publisher: name: Zenodo
Year: 2023
Subjects: Microprocessor, Robotics and Control Engineering

description: Key note of handwritten book This preprint book is helpful for computer engineers, textile engineers, mechanical engineers, students, researchers and professors in the field of Microprocessor, Robotics and Control Engineering. This handbook is written from author’s notebook for exam preparation in Bachelor of Science in Textile Engineering.
Monocular Human Shape and Pose with Dense Mesh-borne Local Image Features
Creators: name: Jena, Shubhendu
name: Multon, Franck
name: Boukhayma, Adnane
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: We propose to improve on graph convolution based approaches for human shape and pose estimation from monocular input, using pixel-aligned local image features. Given a single input color image, existing graph convolutional network (GCN) based techniques for human shape and pose estimation use a single convolutional neural network (CNN) generated global image feature appended to all mesh vertices equally to initialize the GCN stage, which transforms a template T-posed mesh into the target pose. In contrast, we propose for the first time the idea of using local image features per vertex. These features are sampled from the CNN image feature maps by utilizing pixel-to-mesh correspondences generated with DensePose. Our quantitative and qualitative results on standard benchmarks show that using local features improves on global ones and leads to competitive performances with respect to the state-of-the-art.
description: FG 2021
Aza-Triangulene: On-Surface Synthesis, Electronic and Magnetic Properties
Creators: name: Wang, Tao
name: Berdonces-Layunta, Alejandro
name: Friedrich, Niklas
name: Vilas-Varela, Manuel
name: Calupitan, Jan Patrick
name: Pascual, Jose Ignacio
name: Peña, Diego
name: Casanova, David
name: Corso, Martina
name: de Oteyza, Dimas G.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Nitrogen heteroatom doping into a triangulene molecule allows tuning its magnetic state. However, the synthesis of the nitrogen-doped triangulene (aza-triangulene) has been challenging. Herein, we report the successful synthesis of aza-triangulene on the Au(111) and Ag(111) surfaces, along with their characterizations by scanning tunneling microscopy and spectroscopy in combination with density functional theory (DFT) calculations. Aza-triangulenes were obtained by reducing ketone-substituted precursors. Exposure to atomic hydrogen followed by thermal annealing and, when necessary, manipulations with the scanning probe, afforded the target product. We demonstrate that on Au(111) aza-triangulene donates an electron to the substrate and exhibits an open-shell triplet ground state. This is derived from the different Kondo resonances of the final aza-triangulene product and a series of intermediates on Au(111). Experimentally mapped molecular orbitals match perfectly with DFT calculated counterparts for a positively charged aza-triangulene. In contrast, aza-triangulene on Ag(111) receives an extra electron from the substrate and displays a closed-shell character. Our study reveals the electronic properties of aza-triangulene on different metal surfaces and offers an efficient approach for the fabrication of new hydrocarbon structures, including reactive open-shell molecules.
Fermion and scalar two-component dark matter from a $Z_4$ symmetry
Creators: name: Yaguna, Carlos E.
name: Zapata, Óscar
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We revisit a two-component dark matter model in which the dark matter particles are a singlet fermion ($ψ$) and a singlet scalar ($S$), both stabilized by a single $Z_4$ symmetry. The model, which was proposed by Y. Cai and A. Spray, is remarkably simple, with its phenomenology determined by just five parameters: the two dark matter masses and three dimensionless couplings. In fact, $S$ interacts with the Standard Model particles via the usual Higgs-portal, whereas $ψ$ only interacts directly with $S$, via the Yukawa terms $\overline{ψ^c}(y_s+y_pγ^5)ψ\,S$. We consider the two possible mass hierarchies among the dark matter particles, $M_S
description: 30 pages, 12 figures; v2 matches PRD version