cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Scaling regimes of the one-dimensional phase turbulence in the deterministic complex Ginzburg-Landau equation
Creators: name: Vercesi, Francesco
name: Poirier, Susie
name: Minguzzi, Anna
name: Canet, Léonie
Publisher: name: arXiv
Year: 2024
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Quantum Gases (cond-mat.quant-gas)
subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: We study the phase turbulence of the one-dimensional complex Ginzburg-Landau equation, in which the defect-free chaotic dynamics of the order parameter maps to a phase equation well approximated by the Kuramoto-Sivashinsky model. In this regime, the behaviour of the large wavelength modes is captured by the Kardar-Parisi-Zhang equation, determining universal scaling and statistical properties. We present numerical evidence of the existence of an additional scale-invariant regime, with dynamical scaling exponent $z=1$, emerging at scales which are intermediate between the microscopic, intrinsic to the modulational instability, and the macroscopic ones. We argue that this new regime is a signature of the universality class corresponding to the inviscid limit of the Kardar-Parisi-Zhang equation.
Quantum corrections for the cubic Galileon in the covariant language
Creators: name: Saltas, Ippocratis D.
name: Vitagliano, Vincenzo
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We present for the first time an explicit exposition of quantum corrections within the cubic Galileon theory including the effect of quantum gravity, in a background- and gauge-invariant manner, employing the field-reparametrisation approach of the covariant effective action at 1-loop. We show that the consideration of gravitational effects in combination with the non-linear derivative structure of the theory reveals new interactions at the perturbative level, which manifest themselves as higher-operators in the associated effective action, which' relevance is controlled by appropriate ratios of the cosmological vacuum and the Galileon mass scale. The significance and concept of the covariant approach in this context is discussed, while all calculations are explicitly presented.
description: 18 pages plus references, 1 figure
title: Professional and student understanding of harm obsessive-compulsive disorder: a vignette study
Creators: name: Lahey, Chelsea
Publisher: name: Memorial University of Newfoundland
Year: 2022

description: Obsessive compulsive-disorder (OCD) is characterized by obsessions and compulsions that differ significantly across patients. Lesser-known, Harm-related obsessions (i.e., fears of harming others or oneself; Harm OCD) can present in varying ways and are often misidentified – even by professionals – compared to more “prototypical” Contamination obsessions. However, research had not yet tested a vignette design specific to differing presentations of Harm OCD across a sample of professionals and students, particularly medical students. This study surveyed a sample of professionals (registered psychologists, general practitioners; n = 73), doctoral psychology students (n = 92), and medical students (n = 143), gathering diagnostic impressions and risk judgements for one of several Harm OCD vignettes (i.e., fears of harming one’s infant, of smothering one’s partner, of blurting an insult, or of completing suicide) or a social anxiety (control) vignette as compared to a Contamination OCD vignette. Harm OCD was significantly less likely to be identified (76%) than Contamination OCD (97%) through open-ended identification, and social anxiety when using ranked identification methods. Further, professionals and doctoral psychology students were significantly better able to identify Harm OCD than M.D. students, and characters with Harm OCD were perceived as more likely to harm others compared to those with Contamination OCD . The current findings support the need for accurate media representation of the varying OCD presentations, as well as improvement in OCD medical education.
Laying a foundation (奠基)
Creators: name: Zhang Sheng 张胜
name: Zhang Ruwei 张汝为
Publisher: name: University of Victoria Libraries
Year: 2022
Subjects: subject: Ye, Jianying
valueUri: http://id.worldcat.org/fast/117588
subject: Memorials
valueUri: http://id.worldcat.org/fast/1015903
subject: Mao, Zedong, 1893-1976
valueUri: http://id.worldcat.org/fast/28307
subject: Hua, Guofeng
valueUri: http://id.worldcat.org/fast/68151
subject: Hua Guo Feng's Succession
subject: Political Leaders

description: With national minority representatives behind them, Hua Guofeng (front) and Ye Jianying (rear) are shown laying the foundation for the Mao Memorial Hall in Tiananmen Square. Price: 14 fen
Predicting isovector charmonium-like states from X(3872) properties
Creators: name: Zhang, Zhen-Hua
name: Ji, Teng
name: Dong, Xiang-Kun
name: Guo, Feng-Kun
name: Hanhart, Christoph
name: Meißner, Ulf-G.
name: Rusetsky, Akaki
Publisher: name: arXiv
Year: 2024
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: Using chiral effective field theory, we predict that there must be isovector charmonium-like $D\bar D^*$ hadronic molecules with $J^{PC}=1^{++}$ denoted as $W_{c1}$. The inputs are the properties of the $X(3872)$, including its mass and the ratio of its branching fractions of decays into $J/ψρ^0$ and $J/ψω$. The predicted states are virtual state poles of the scattering matrix, pointing at a molecular nature of the $X(3872)$ as well as its spin partners. They should show up as either a mild cusp or dip at the $D\bar D^*$ thresholds, explaining why they are elusive in experiments. The so far negative observation also indicates that the $X(3872)$ is either a bound state with non-vanishing binding energy or a virtual state, only in these cases the $X(3872)$ signal dominates over that from the $W_{c1}^0$. The pole positions are $3881.2^{+0.8}_{-0.0}- i 1.6^{+0.7}_{-0.9}$ MeV for $W_{c1}^0$ on the fourth Riemann sheet of the $D^0\bar D^{*0}$-$D^+D^{*-}$ coupled-channel system, and $3866.9^{+4.6}_{-7.7}- i (0.07\pm0.01)$ MeV for $W_{c1}^\pm$ on the second Riemann sheet of the $(D\bar D^*)^\pm$ single-channel system. The findings imply that the peak in the $J/ψπ^+π^-$ invariant mass distribution is not purely from the $X(3872)$ but contains contributions from $W_{c1}^0$ predicted here. The states should have isovector heavy quark spin partners with $J^{PC}=0^{++}$, $2^{++}$ and $1^{+-}$, with the last one corresponding to $Z_c$. We suggest to search for the charged $0^{++}$, $1^{++}$ and $2^{++}$ states in $J/ψπ^\pm π^0$.
description: 26 pages, 8 figures; version to be published in JHEP
Detecting Galaxy Groups and AGNs populating the local Universe in the eROSITA era
Creators: name: Marini, I.
name: Popesso, P.
name: Lamer, G.
name: Dolag, K.
name: Biffi, V.
name: Vladutescu-Zopp, S.
name: Dev, A.
name: Toptun, V.
name: Bulbul, E.
name: Comparat, J.
name: Malavasi, N.
name: Merloni, A.
name: Mroczkowski, T.
name: Ponti, G.
name: Seppi, R.
name: Shreeram, S.
name: Zhang, Y.
Publisher: name: arXiv
Year: 2024
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The eROSITA will deliver an unprecedented volume of X-ray survey observations, 20-30 times more sensitive than ROSAT in the soft band (0.5-2 keV) and for the first time imaging in the hard band (2-10 keV) including galaxy clusters and groups along with obscured and unobscured AGNs. This calls for a powerful theoretical effort to control the systematics and biases that may affect the data analysis. We investigate the detection technique and selection effects in the galaxy group and AGN populations of a mock eROSITA survey at the depth of eRASS:4. We create a $30\times 30$ deg$^{2}$ mock observation based on the cosmological hydrodynamical simulation Magneticum Pathfinder within z=0-0.2. We combine a physical background extracted from the real eFEDS background analysis with realistic simulations of X-ray emission for the hot gas, AGNs and X-ray binaries. We apply a detection procedure equivalent to the reduction done on eRASS data and evaluate the completeness and contamination to reconstruct the luminosity functions of the extended and point sources in the catalogue. We assess the completeness of extended detections as a function of the input X-ray flux and halo. We achieve full recovery of the brightest (most massive) clusters and AGNs. However, a significant fraction of galaxy groups remains undetected. Examining the gas properties between the detected and undetected galaxy groups at fixed halo mass, we observe that the detected population exhibits, on average, higher X-ray brightness compared to the undetected ones. Moreover, we find that X-ray luminosity primarily correlates with the hot gas fraction, rather than temperature or metallicity. Our simulation suggests the presence of a systematic selection effect in current surveys, resulting in X-ray survey catalogues predominantly composed of the lowest-entropy, gas-richest, and highest surface brightness halos on galaxy group scales.
description: 18 pages, 14 figures, submitted to A&A
Semiconductor devices for entangled photon pair generation: a review
Creators: name: Orieux, Adeline
name: Versteegh, Marijn A. M.
name: Jöns, Klaus D.
name: Ducci, Sara
Publisher: name: arXiv
Year: 2017
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Entanglement is one of the most fascinating properties of quantum mechanical systems; when two particles are entangled the measurement of the properties of one of the two allows to instantaneously know the properties of the other, whatever the distance separating them. In parallel with fundamental research on the foundations of quantum mechanics performed on complex experimental set-ups, we assist today to a bourgeoning of quantum information technologies bound to exploit entanglement for a large variety of applications such as secure communications, metrology and computation. Among the different physical systems under investigation, those involving photonic components are likely to play a central role and in this context semiconductor materials exhibit a huge potential in terms of integration of several quantum components in miniature chips. In this article we review the recent progress in the development of semiconductor devices emitting entangled photons. We will present the physical processes allowing to generate entanglement and the tools to characterize it; we will give an overview of major recent results of the last years and highlight perspectives for future developments.
description: Review article (58 pages, 25 figures, 240 references)
Evaluation of dissolved carbon dioxide to stimulate emergence of red swamp crayfish Procambarus clarkii (Decapoda: Cambaridae) from infested ponds
Creators: name: Abdelrahman, Hisham A.
name: Gibson, Rebecca L.
name: Fogelman, Kaelyn J.
name: Cupp, Aaron R.
name: Allert, Ann L.
name: Stoeckel, James A.
Publisher: name: Regional Euro-Asian Biological Invasions Centre
Year: 2021
Subjects: biological invasions
chemical control
invasive crayfish infestation
invaded ponds
integrated pest management programs
invasive species control
crayfish capture freqency

description: Invasive crayfish have adverse effects on habitats and native species. Control of invasive crayfish populations is a major challenge facing natural resource managers. This study evaluated the effectiveness and optimal conditions for the control agent carbon dioxide (CO2), which can be diffused into water to facilitate capture of red swamp crayfish (Procambarus clarkii; RSC). The efficacy of CO2 shows promise in its use for a variety of invasive aquatic species. Here, we evaluate CO2’s ability to stimulate movements towards the shoreline and/or induce complete terrestrial emergence from outdoor ponds. Twelve pond trials were conducted using three, 0.02-ha experimental ponds at Auburn University, Alabama, USA. Silt fencing was installed on dry land around the perimeter of each pond with the lower 0.3 m of fencing accordion-folded to provide shelter and a collection point for emerging crayfish. Each pond was stocked with 100 RSC before testing. Experimental treatment ponds were then injected with gaseous CO2 using porous air diffusers, whereas control ponds (C ponds) received no CO2. Multiple water quality parameters were monitored hourly. Three independent treatment scenarios with CO2 diffusion were crayfish captured at the end of trial only (F: final), crayfish captured hourly (H: hourly), and incorporation of continuous inflow of fresh water at a flow rate of 0.2 L/s into the central catch basin to serve as a refuge with crayfish captured hourly (R: refuge). In control ponds, crayfish were captured at the end of trial only. In F ponds, CO2 diffusion for approximately five hours caused a mean of 12% of total crayfish to emerge from the water. However, capture efficiency was increased to a mean of 45% of total crayfish by increasing collection frequency to every hour and netting submerged crayfish near the water edge in addition to capturing terrestrially emerged crayfish. Presence of a freshwater inflow reduced capture efficiency in R ponds relative to H ponds. Odds of capturing crayfish increased with increasing water temperature, CO2 concentration, crayfish mass, and with decreasing pH. Based on results, we provide a set of predictive equations as well as interactive calculators to help natural resource managers explore several environmental and treatment-related scenarios that predict changes in capture probability in small research ponds. Carbon dioxide shows promises as a tool to increase capture rate of RSC. It is not likely to be 100% effective by itself, but could be a useful component of an integrated management strategy.
Domain wall migration-mediated ferroelectric switching and Rashba effect tuning in GeTe thin films
Creators: name: Vojáček, Libor
name: Chshiev, Mairbek
name: Li, Jing
Publisher: name: arXiv
Year: 2024
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Germanium Telluride (GeTe), identified as a ferroelectric Rashba semiconductor, is a promising candidate for future electronic devices in computing and memory applications. However, its ferroelectric switching on a microscopic scale remains to be understood. Here, we propose that the migration of a domain wall can be the mechanism that mediates the ferroelectric switching. By employing $ab~initio$ methods, such a mechanism is characterized by an energy barrier of $66.8$ meV/nm$^2$, in a suitable range for retention and switchability. In accompanying the domain wall migration, the net Rashba effect is tunable, as it is a result of competition between layers with opposite electric polarization. These results shed light on the ferroelectric switching mechanism in GeTe, paving stones for the design of potential GeTe-based devices.
Using microCT imaging technique for studying the craniofacial structures of human fetuses: a protocol for a scoping review.
Creators: name: Kalin, Kadriye
Publisher: name: Open Science Framework
Year: 2023
Subjects: subject: Embryonic Structures
subject: Medicine and Health Sciences
subject: Anatomy
subject: preregistration
subject: scoping review
subject: protocol

description: This manuscript presents a protocol for a scoping review to systematically map the available literature regarding the possible imaging techniques used in studies with human fetuses as a preparation for our following microCT research in the craniofacial structures of human fetuses with Trisomy 21.
Halogen Bonding from Dispersion-Corrected Density-Functional Theory: The Role of Delocalization Error
Creators: name: Otero de la Roza, Alberto
name: Johnson, Erin
name: DiLabio, Gino
Publisher: name: figshare
Year: 2024
Subjects: classificationCode: 340701
subject: Computational chemistry
classificationCode: 340704
subject: Theoretical quantum chemistry

description: Halogen bonds are formed when a Lewis base interacts with a halogen atom in a diﬀerent molecule, which acts as an electron acceptor. Due to its charge transfer component, halogen bonding is diﬃcult to model using many common density-functional approximations because they spuriously overstabilize halogen-bonded dimers. It has been suggested that dispersion-corrected density functionals are inadequate to describe halogen bonding. In this work, we show that the exchange-hole dipole moment (XDM) dispersion correction coupled with functionals that minimize delocalization error (for instance, BH&HLYP, but also other half-and-half functionals) accurately model halogen-bonded interactions, with average errors similar to other noncovalent dimers with less charge-transfer eﬀects. The performance of XDM is evaluated for three previously proposed benchmarks (XB18 and XB51 by Kozuch and Martin, and the set proposed by Bauzá et al.) spanning a range of binding energies up to ∼50 kcal/mol. The good performance of BH&HLYP-XDM is comparable to M06-2X, and extends to the “extreme” cases in the Bauzá set. This set contains anionic electron donors where charge transfer occurs even at inﬁnite separation, as well as other charge transfer dimers belonging to the pnictogen and chalcogen bonding classes. We also show that functional delocalization error results in an overly delocalized electron density and exact-exchange hole. We propose intermolecular Bader delocalization indices as an indicator of both the donor−acceptor character of an intermolecular interaction and the delocalization error coming from the underlying functional.
Vacuum State of the Dirac Field in de Sitter Space and Entanglement Entropy
Creators: name: Kanno, Sugumi
name: Sasaki, Misao
name: Tanaka, Takahiro
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We compute the entanglement entropy of a free massive Dirac field between two causally disconnected open charts in de Sitter space. We first derive the Bunch-Davies vacuum mode functions of the Dirac field. We find there exists no supercurvature mode for the Dirac field. We then give the Bogoliubov transformation between the Bunch-Davies vacuum and the open chart vacua that makes the reduced density matrix diagonal. We find that the Dirac field becomes more entangled than a scalar field as $m^2/H^2$ becomes small, and the difference is maximal in the massless limit.
description: 22 pages, 2 figures
Asymmetric self-interacting dark matter with a canonical seesaw model
Creators: name: Borah, Debasish
name: Mahapatra, Satyabrata
name: Paul, Partha Kumar
name: Sahu, Narendra
name: Shukla, Prashant
Publisher: name: arXiv
Year: 2024
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We study the possibility of generating dark matter (DM) and baryon asymmetry of the Universe (BAU) simultaneously in an asymmetric DM framework, which also alleviates the small-scale structure issues of cold DM. While the thermal relic of such self-interacting DM remains under-abundant due to efficient annihilation into light mediators, a nonzero asymmetry in the dark sector can lead to the survival of the required DM in the Universe. The existence of a light mediator leads to the required self-interactions of DM at small scales while keeping DM properties similar to cold DM at large scales. It also ensures that the symmetric DM component annihilates away, leaving the asymmetric part in the spirit of cogenesis. The particle physics implementation is done in canonical seesaw models of light neutrino mass, connecting it to the origin of DM and BAU. In particular, we consider type-I and type-III seesaw origin of neutrino mass for simplicity and minimality of the field content. We show that the desired self-interactions and relic of DM together with BAU while satisfying relevant constraints lead to strict limits on DM mass $\mathcal{O}({\rm GeV}) \lesssim M_{\rm DM} \lesssim460 $ GeV. In spite of being a high-scale seesaw, the models remain verifiable in different experiments, including direct and indirect DM searches as well as colliders.
description: 20 pages, 18 captioned figures, version accepted for publication in Phys. Rev. D
Tests and problems of the standard model in Cosmology
Creators: name: Lopez-Corredoira, Martin
Publisher: name: arXiv
Year: 2017
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: The main foundations of the standard $Λ$CDM model of cosmology are that: 1) The redshifts of the galaxies are due to the expansion of the Universe plus peculiar motions; 2) The cosmic microwave background radiation and its anisotropies derive from the high energy primordial Universe when matter and radiation became decoupled; 3) The abundance pattern of the light elements is explained in terms of primordial nucleosynthesis; and 4) The formation and evolution of galaxies can be explained only in terms of gravitation within a inflation+dark matter+dark energy scenario. Numerous tests have been carried out on these ideas and, although the standard model works pretty well in fitting many observations, there are also many data that present apparent caveats to be understood with it. In this paper, I offer a review of these tests and problems, as well as some examples of alternative models.
description: review, 64 pages, 473 references, accepted to be published in "Foundations of Physics"
How many atoms get excited when they decay?
Creators: name: Blocher, Philip Daniel
name: Molmer, Klaus
Publisher: name: arXiv
Year: 2017
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We analyze the time evolution of a two-level system prepared in a superposition of its ground state and radiatively unstable excited state. We show that by choosing appropriate means of detection of the radiated field, we can steer the evolution of the emitter and herald its preparation in the fully excited state. We determine the probability for the occurrence of this "excitation during the decay" of a remote emitter.
description: 11 pages (including appendix), 6 figures
Spectroscopy with the tensor renormalization group method
Creators: name: Az-zahra, Fathiyya Izzatun
name: Takeda, Shinji
name: Yamazaki, Takeshi
Publisher: name: arXiv
Year: 2024
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: We present a spectroscopy scheme for the lattice field theory by using the tensor renormalization group method combining with the transfer matrix formalism. By using the scheme, we cannot only compute the energy spectrum for the lattice theory but also determine quantum numbers of the energy eigenstates. Furthermore, the wave function of the corresponding eigenstate can also be computed. The first step of the scheme is to coarse grain the tensor network of a given lattice model by using the higher order tensor renormalization group, and then after making a matrix corresponding to a transfer matrix from the coarse-grained tensors, its eigenvalues are evaluated to extract the energy spectrum. Second, the quantum number of the eigenstates can be identified by a selection rule that requires to compute matrix elements of an associated insertion operator. The matrix elements can be represented by an impurity tensor network and computed by the coarse-graining scheme. Moreover, we can compute the wave function of the energy eigenstate by putting the impurity tensor at each point in space direction of the network. Additionally, the momentum of the eigenstate can also be identified by computing appropriate matrix elements represented by the tensor network. As a demonstration of the new scheme, we show the spectroscopy of the $(1+1)$d Ising model and compare it with exact results. We also present a scattering phase shift obtained from two-particle state energy using Lüscher's formula.
description: 38 pages, 18 figures, 4 tables
Reevaluating the Stability and Prevalence of Conglomerates: Implications for Preferential Crystallization
Creators: name: Otero de la Roza, Alberto
name: Hein, Jason E.
name: Johnson, Erin
Publisher: name: figshare
Year: 2024
Subjects: classificationCode: 340701
subject: Computational chemistry
classificationCode: 340704
subject: Theoretical quantum chemistry

description: Chiral resolution by preferential crystallization from a racemic or scalemic solution occurs by selective crystallization of a single enantiomer as a homochiral solid phase, known as a conglomerate. However, there is a prevailing perception that stable homochiral crystals are quite rare and are estimated to form in only 5−10% of all chiral compounds. In this work, the prevalence rate of stable conglomerates is reexamined using dispersion-corrected density-functional theory calculations for a collection of homochiral and heterochiral crystal pairs. The homochiral crystal is found to be the thermodynamically stable phase for 19% of the examined compounds. This value represents a lower bound of the prevalence rate since our sample is necessarily biased because the comparison is limited to cases where a stable heterochiral phase exists and does not include molecules with no reported heterochiral phase. Even so, this lower bound is two to four times higher than the often-quoted conglomerate prevalence rate, a value that is also based on (experimental) thermodynamic quantities. In addition, our results are used to reexamine Wallach’s rule and the close-packing principle. It is concluded that the prevalence of stable conglomerates has been underestimated, and, provided thermodynamic equilibrium drives the crystallization process, preferential crystallization has a much wider scope of applicability than previously assumed.
Discrete BPS Skyrmions
Creators: name: Agaoglou, M.
name: Charalampidis, E. G.
name: Ioannidou, T. A.
name: Kevrekidis, P. G.
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Pattern Formation and Solitons (nlin.PS)
subject: FOS: Physical sciences

description: A discrete analogue of the extended Bogomolny-Prasad-Sommerfeld (BPS) Skyrme model that admits time-dependent solutions is presented. Using the spacing h of adjacent lattice nodes as a parameter, we identify the spatial profile of the solution and the continuation of the relevant branch of solutions over the lattice spacing for different values of the potential (free) parameter α. In particular, we explore the dynamics and stability of the obtained solutions, finding that, while they generally seem to be prone to instabilities, for suitable values of the lattice spacing and for sufficiently large value of α, they may be long-lived in direct numerical simulations.
description: 15 pages, 7 figures
Mauerbau und Wehrpflicht
Creators: name: Krätzner-Ebert, Anita
Publisher: name: Universität Rostock
Year: 2009
Subjects: subject: 943 General history of Europe Central Europe Germany

description: Im Bericht über das Studienjahr 1961/62 des Germanistischen Instituts der Universität Rostock findet sich folgender Eintrag: „Der ideologische Schwerpunkt des Germanistischen Instituts wurde im Studienjahr 1961/62 durch die Auswertung der großen politischen Ereignisse und Dokumente bestimmt. [...] Die kontinuierlich geplante ideologisch-erzieherische Einwirkung auf die Studenten zeigt sich, wie wir meinen, im Elan des augenblicklichen Ernteeinsatzes.“ Die These, die der Berichterstatter aufstellt, soll im Rahmen dieser Hausarbeit zum ersten Staatsexamen eingehend untersucht werden. Dazu stellt sich die Frage, ob der „ideologische Schwerpunkt“ tatsächlich auf die Auswertung der „politischen Ereignisse und Dokumente“ gelegt worden war. Diese Arbeit soll sich hauptsächlich mit den Diskussionen um den Mauerbau (und dem damit verbundenen Brief der FDJ-Hochschulgruppe an Walter Ulbricht) sowie mit denen um die Wehrpflicht beschäftigen. Vor diesem Hintergrund soll geklärt werden, welche Argumente die Lehrenden und die Studierenden dabei vorbrachten und inwiefern tatsächlich von einer „kontinuierlich ideologisch-erzieherische[n] Einwirkung auf die Studenten“ berichtet werden konnte.
A Case Study on the Parametric Occurrence of Multiple Steady States
Creators: name: Bradford, Russell
name: Davenport, James H.
name: England, Matthew
name: Errami, Hassan
name: Gerdt, Vladimir
name: Grigoriev, Dima
name: Hoyt, Charles
name: Kosta, Marek
name: Radulescu, Ovidiu
name: Sturm, Thomas
name: Weber, Andreas
Publisher: name: arXiv
Year: 2017
Subjects: subject: Symbolic Computation (cs.SC)
subject: FOS: Computer and information sciences
subject: I.1.4

description: We consider the problem of determining multiple steady states for positive real values in models of biological networks. Investigating the potential for these in models of the mitogen-activated protein kinases (MAPK) network has consumed considerable effort using special insights into the structure of corresponding models. Here we apply combinations of symbolic computation methods for mixed equality/inequality systems, specifically virtual substitution, lazy real triangularization and cylindrical algebraic decomposition. We determine multistationarity of an 11-dimensional MAPK network when numeric values are known for all but potentially one parameter. More precisely, our considered model has 11 equations in 11 variables and 19 parameters, 3 of which are of interest for symbolic treatment, and furthermore positivity conditions on all variables and parameters.
description: Accepted into ISSAC 2017. This version has additional page showing all 11 CAD trees discussed in Section 2.1.1
Embedded FPGA Developments in 130nm and 28nm CMOS for Machine Learning in Particle Detector Readout
Creators: name: Gonski, Julia
name: Gupta, Aseem
name: Jia, Haoyi
name: Kim, Hyunjoon
name: Rota, Lorenzo
name: Ruckman, Larry
name: Dragone, Angelo
name: Herbst, Ryan
Publisher: name: arXiv
Year: 2024
Subjects: subject: Hardware Architecture (cs.AR)
subject: Machine Learning (cs.LG)
subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences

description: Embedded field programmable gate array (eFPGA) technology allows the implementation of reconfigurable logic within the design of an application-specific integrated circuit (ASIC). This approach offers the low power and efficiency of an ASIC along with the ease of FPGA configuration, particularly beneficial for the use case of machine learning in the data pipeline of next-generation collider experiments. An open-source framework called "FABulous" was used to design eFPGAs using 130 nm and 28 nm CMOS technology nodes, which were subsequently fabricated and verified through testing. The capability of an eFPGA to act as a front-end readout chip was assessed using simulation of high energy particles passing through a silicon pixel sensor. A machine learning-based classifier, designed for reduction of sensor data at the source, was synthesized and configured onto the eFPGA. A successful proof-of-concept was demonstrated through reproduction of the expected algorithm result on the eFPGA with perfect accuracy. Further development of the eFPGA technology and its application to collider detector readout is discussed.
description: 16 pages, 12 figures
YANGI O`ZBEKISTONDA MADANIY SIYOSATNING XUSUSIYATLAR
Creators: name: Ostonova, Maftuna
name: Nishonova, Jumagul
Publisher: name: Zenodo
Year: 2024

description: Mustaqil  O‘zbekiston  Respublikasi  o‘z  taraqqiyot  yo‘lini  belgilab  olar  ekan, demokratik huquqiy davlat va adolatli fuqarolik jamiyati qurishni o‘z oldiga pirovard maqsad qilib qo‘ydi. Bu oliy maqsad yo‘lida shu kungacha ko‘pdan-ko‘p ishlar   amalga   oshirildi.  Ushbu maqola shu haqida.
Scale effects on spatially embedded contact networks
Creators: name: Gao, Peng
name: Bian, Ling
Publisher: name: arXiv
Year: 2017
Subjects: subject: Social and Information Networks (cs.SI)
subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: Physics and Society (physics.soc-ph)
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences

description: Spatial phenomena are subject to scale effects, but there are rarely studies addressing such effects on spatially embedded contact networks. There are two types of structure in these networks, network structure and spatial structure. The network structure has been actively studied. The spatial structure of these networks has received attention only in recent years. Certainly little is known whether the two structures respond to each other. This study examines the scale effects, in terms of spatial extent, on the network structure and the spatial structure of spatially embedded contact networks. Two issues are explored, how the two types of structures change in response to scale changes, and the range of the scale effects. Two sets of areal units, regular grids with 24 different levels of spatial extent and census units of three levels of spatial extent, are used to divide one observed and two reference random networks into multiple scales. Six metrics are used to represent the two structures. Results show different scale effects. In terms of the network structure, the properties of the observed network are sensitive to scale changes at fine scales. In comparison, the clustered spatial structure of the network is scale independent. The behaviors of the network structure are affected by the spatial structure. This information helps identify vulnerable households and communities to health risks and helps deploy intervention strategies to spatially targeted areas.
FRAME: A Modular Framework for Autonomous Map Merging: Advancements in the Field
Creators: name: Stathoulopoulos, Nikolaos
name: Lindqvist, Björn
name: Koval, Anton
name: Agha-mohammadi, Ali-akbar
name: Nikolakopoulos, George
Publisher: name: arXiv
Year: 2024
Subjects: subject: Robotics (cs.RO)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: In this article, a novel approach for merging 3D point cloud maps in the context of egocentric multi-robot exploration is presented. Unlike traditional methods, the proposed approach leverages state-of-the-art place recognition and learned descriptors to efficiently detect overlap between maps, eliminating the need for the time-consuming global feature extraction and feature matching process. The estimated overlapping regions are used to calculate a homogeneous rigid transform, which serves as an initial condition for the GICP point cloud registration algorithm to refine the alignment between the maps. The advantages of this approach include faster processing time, improved accuracy, and increased robustness in challenging environments. Furthermore, the effectiveness of the proposed framework is successfully demonstrated through multiple field missions of robot exploration in a variety of different underground environments.
description: 28 pages, 24 figures. Accepted to the IEEE Transactions on Field Robotics
Scalar perturbations from inflation in the presence of gauge fields
Creators: name: Durrer, R.
name: von Eckardstein, R.
name: Garg, Deepen
name: Schmitz, K.
name: Sobol, O.
name: Vilchinskii, S.
Publisher: name: arXiv
Year: 2024
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 study how Abelian-gauge-field production during inflation affects scalar perturbations in the case when the gauge field interacts with the inflaton directly (by means of generic kinetic and axial couplings) and via gravity. The homogeneous background solution is defined by self-consistently taking into account the backreaction of the gauge field on the evolution of the inflaton and the scale factor. For the perturbations on top of this background, all possible scalar contributions coming from the inflaton, the metric, and the gauge field are considered. We derive a second-order differential equation for the curvature perturbation, $ζ$, capturing the impact of the gauge field, both on the background dynamics and on the evolution of scalar perturbations. The latter is described by a source term in the $ζ$ equation, which is quadratic in the gauge-field operators and leads to non-Gaussianities in the curvature perturbations. We derive general expressions for the induced scalar power spectrum and bispectrum. Finally, we apply our formalism to the well-known case of axion inflation without backreaction. Numerical results show that, in this example, the effect of including metric perturbations is small for values of the gauge-field production parameter $ξ> 3$. This is in agreement with the previous results in the literature. However, in the region of smaller values, $ξ\lesssim 2$, our new results exhibit order-of-unity deviations when compared to previous results.
description: 40 pages, 6 figures, 1 table, 146 references
Using sunRunner3D to interpret the global structure of the heliosphere from in situ measurements
Creators: name: González-Avilés, José Juan
name: Riley, Pete
name: Ben-Nun, Michal
name: Mayank, Prateek
name: Vaidya, Bhargav
Publisher: name: arXiv
Year: 2024
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Space Physics (physics.space-ph)
subject: FOS: Physical sciences

description: Understanding the large-scale three-dimensional structure of the inner heliosphere, while important in its own right, is crucial for space weather applications, such as forecasting the time of arrival and propagation of coronal mass ejections (CMEs). This study uses sunRunner3D (3D), a 3-D magnetohydrodynamic (MHD) model, to simulate solar wind (SW) streams and generate background states. SR3D employs the boundary conditions generated by CORona-HELiosphere (CORHEL) and the PLUTO code to compute the plasma properties of the SW with the MHD approximation up to 1.1 AU in the inner heliosphere. We demonstrate that SR3D reproduces global features of Corotating Interaction Regions (CIRs) observed by Earth-based spacecraft (OMNI) and the Solar TErrestial RElations Observatory (STEREO)-A for a set of Carrington rotations (CRs) that cover a period that lays in the late declining phase of solar cycle 24. Additionally, we demonstrate that the model solutions are valid in the corotating and inertial frames of references. Moreover, a comparison between SR3D simulations and in-situ measurements shows reasonable agreement with the observations, and our results are comparable to those achieved by Predictive Science Inc.'s Magnetohydrodynamic Algorithm outside a Sphere (MAS) code. We have also undertaken a comparative analysis with the Space Weather Adaptive Simulation Framework for Solar Wind (SWASTi-SW), a PLUTO physics-based model, to evaluate the precision of various initial boundary conditions. Finally, we discuss the disparities in the solutions derived from inertial and rotating frames.
description: 31 pages, 9 figures, 3 tables, accepted for publication in the Journal of Space Weather and Space Climate
Neutrino-driven Explosions
Creators: name: Janka, H. -Th.
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: The question why and how core-collapse supernovae (SNe) explode is one of the central and most long-standing riddles of stellar astrophysics. A solution is crucial for deciphering the SN phenomenon, for predicting observable signals such as light curves and spectra, nucleosynthesis, neutrinos, and gravitational waves, for defining the role of SNe in the evolution of galaxies, and for explaining the birth conditions and properties of neutron stars (NSs) and stellar-mass black holes. Since the formation of such compact remnants releases over hundred times more energy in neutrinos than the SN in the explosion, neutrinos can be the decisive agents for powering the SN outburst. According to the standard paradigm of the neutrino-driven mechanism, the energy transfer by the intense neutrino flux to the medium behind the stagnating core-bounce shock, assisted by violent hydrodynamic mass motions (sometimes subsumed by the term "turbulence"), revives the outward shock motion and thus initiates the SN blast. Because of the weak coupling of neutrinos in the region of this energy deposition, detailed, multidimensional hydrodynamic models including neutrino transport and a wide variety of physics are needed to assess the viability of the mechanism. Owing to advanced numerical codes and increasing supercomputer power, considerable progress has been achieved in our understanding of the physical processes that have to act in concert for the success of neutrino-driven explosions. First studies begin to reveal observational implications and avenues to test the theoretical picture by data from individual SNe and SN remnants but also from population-integrated observables. While models will be further refined, a real breakthrough is expected through the next Galactic core-collapse SN, when neutrinos and gravitational waves can be used to probe the conditions deep inside the dying star. (abridged)
description: Author version of chapter for 'Handbook of Supernovae,' edited by A. Alsabti and P. Murdin, Springer. 54 pages, 13 figures
Digitally-enhanced analogue solution for optical carrier transfer; human intervention-free relocking of the in-loop PLL of the stabilized optical frequency transfer system
Creators: name: Przemysław Włodarczyk
name: Krehlik, Przemysław
name: Śliwczyński, Łukaswz
Publisher: name: Zenodo
Year: 2022

description: The solution described below was developed within the TiFOON 18SIB06 project at AGH University of Science and Technology. This technical note is complementary to the scientific paper: https://doi.org/10.24425/mms.2020.134586
YANGI O'ZBEKISTONNING MADANIYAT VA SAN'AT SOHASIDAGI DAVLAT BOSHQARUVINING ZAMONAVIY KONSEPTSIYALARI
Creators: name: Arslanbayeva, Munisa
name: Nishonova, Jumagul
Publisher: name: Zenodo
Year: 2024

description: Mazkur maqolada mamlakatimizdagi madaniyat va san’at ta’limida xorij tajribasining o‘rni va ahamiyati, mamlakatimizda ushbu sohaga berilayotgan e’tibor, madaniyat va san’at ta’limining shakllanishi va rivojlanishi hamda ushbu sohada xorij tajribasidan foydalanib olib borilishi lozim bo‘lgan islohotlar tahliliy bayon etilgan. Shuningdek san’at va madaniyat boshqaruvini O‘zbekiston sharoitiga moslashtirish, boshqaruvga yangi kreativlik asosida Respublikamizdagi barcha san’at muassasalari faoliyatini o’rganish va unga yordam beruvchi tavsiyalarni haqida ma’lumot beradi. Undan tashqari Yangilanayotgan O‘zbekistonda madaniyat va san’at sohasiga qaratilayotgan e’tibor, sohaga doir amalga oshirilayotgan va kelgusida amalga oshirilishi rejalashtirilayotgan chora-tadbirlar xususida so‘z yuritilgan.
Efficient quantum walk on the grid with multiple marked elements
Creators: name: Hoyer, Peter
name: Komeili, Mojtaba
Publisher: name: arXiv
Year: 2016
Subjects: subject: Quantum Physics (quant-ph)
subject: Data Structures and Algorithms (cs.DS)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences
subject: F.1.2; F.2.2; G.2.2

description: We give a quantum algorithm for finding a marked element on the grid when there are multiple marked elements. Our algorithm uses quadratically fewer steps than a random walk on the grid, ignoring logarithmic factors. This is the first known quantum walk that finds a marked element in a number of steps less than the square-root of the extended hitting time. We also give a new tighter upper bound on the extended hitting time of a marked subset, expressed in terms of the hitting times of its members.
description: 18 pages, to appear in STACS 2017, the 34th International Symposium on Theoretical Aspects of Computer Science
Observation of Spin-Orbit Effects with Spin Rotation Symmetry
Creators: name: Humphries, Alisha M.
name: Wang, Tao
name: Edwards, Eric R. J.
name: Allen, Shane R.
name: Shaw, Justin M.
name: Nembach, Hans T.
name: Xiao, John Q.
name: Silva, T. J.
name: Fan, Xin
Publisher: name: arXiv
Year: 2017
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The spin-orbit interaction enables interconversion between a charge current and a spin current. It is usually believed that in a nonmagnetic metal (NM) or at a NM/ferromagnetic metal (FM) bilayer interface, the symmetry of spin-orbit effects (SOE) requires that the spin current, charge current and spin orientation are all orthogonal to each other. Here we show the observation of a SOE near the NM/FM interface that exhibits a very different symmetry from the conventional spin Hall effect, insofar as the spin polarization is further rotated about the magnetization. These results imply that a perpendicularly polarized spin current can be generated with an in-plane charge current simply by use of a FM/NM bilayer with magnetization collinear to the charge current. The ability to generate a spin current with arbitrary polarization using typical magnetic materials will greatly benefit the development of magnetic memories.
Stability of fundamental couplings: a global analysis
Creators: name: Martins, C. J. A. P.
name: Pinho, A. M. M.
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: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Astrophysical tests of the stability of fundamental couplings are becoming an increasingly important probe of new physics. Motivated by the recent availability of new and stronger constraints we update previous works testing the consistency of measurements of the fine-structure constant $α$ and the proton-to-electron mass ratio $μ=m_p/m_e$ (mostly obtained in the optical/ultraviolet) with combined measurements of $α$, $μ$ and the proton gyromagnetic ratio $g_p$ (mostly in the radio band). We carry out a global analysis of all available data, including the 293 archival measurements of {\it Webb et al.} and 66 more recent dedicated measurements, and constraining both time and spatial variations. While nominally the full datasets show a slight statistical preference for variations of $α$ and $μ$ (at up to two standard deviations), we also find several inconsistencies between different sub-sets, likely due to hidden systematics and implying that these statistical preferences need to be taken with caution. The statistical evidence for a spatial dipole in the values of $α$ is found at the 2.3 sigma level. Forthcoming studies with facilities such as ALMA and ESPRESSO should clarify these issues.
description: 13 pages, 10 figures