cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Coordination among metabolism, cell growth and cell division
Creators: name: Slavov, Nikolai
Publisher: name: F1000Research
Year: 2015

description: We studied the steady-state responses to changes in growth rate of yeast when ethanol is the sole source of carbon and energy. Analysis of these data, together with data from studies where glucose was the carbon source, allowed us to distinguish a “universal” growth rate response (GRR) common to all media studied from a GRR specific to the carbon source. Genes with positive universal GRR include ribosomal, translation, and mitochondrial genes, and those with negative GRR include autophagy, vacuolar, and stress response genes. The carbon source–specific GRR genes control mitochondrial function, peroxisomes, and synthesis of vitamins and cofactors, suggesting this response may reflect the intensity of oxidative metabolism. All genes with universal GRR, which comprise 25% of the genome, are expressed periodically in the yeast metabolic cycle (YMC). We propose that the universal GRR may be accounted for by changes in the relative durations of the YMC phases. This idea is supported by oxygen consumption data from metabolically synchronized cultures with doubling times ranging from 5 to 14 h. We found that the high oxygen consumption phase of the YMC can coincide exactly with the S phase of the cell division cycle, suggesting that oxidative metabolism and DNA replication are not incompatible.

Supporting Data

Despite rapid progress in characterizing the yeast metabolic cycle, its connection to the cell division cycle (CDC) has remained unclear. We discovered that a prototrophic batch culture of budding yeast, growing in a phosphate-limited ethanol medium, synchronizes spontaneously and goes through multiple metabolic cycles, whereas the fraction of cells in the G1/G0 phase of the CDC increases monotonically from 90 to 99%. This demonstrates that metabolic cycling does not require cell division cycling and that metabolic synchrony does not require carbon-source limitation. More than 3,000 genes, including most genes annotated to the CDC, were expressed periodically in our batch culture, albeit a mere 10% of the cells divided asynchronously; only a smaller subset of CDC genes correlated with cell division. These results suggest that the yeast metabolic cycle reflects a growth cycle during G1/G0 and explains our previous puzzling observation that genes annotated to the CDC increase in expression at slow growth.
Magnetic fields in the Milky Way from pulsar observations: effect of the correlation between thermal electrons and magnetic fields
Creators: name: Seta, Amit
name: Federrath, Christoph
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Pulsars can act as an excellent probe of the Milky Way magnetic field. The average strength of the Galactic magnetic field component parallel to the line of sight can be estimated as $\langle B_\parallel \rangle = 1.232 \, \text{RM}/\text{DM}$, where $\text{RM}$ and $\text{DM}$ are the rotation and dispersion measure of the pulsar. However, this assumes that the thermal electron density and magnetic field of the interstellar medium are uncorrelated. Using numerical simulations and observations, we test the validity of this assumption. Based on magnetohydrodynamical simulations of driven turbulence, we show that the correlation between the thermal electron density and the small-scale magnetic field increases with increasing Mach number of the turbulence. We find that the assumption of uncorrelated thermal electron density and magnetic fields is valid only for subsonic and transsonic flows, but for supersonic turbulence, the field strength can be severely overestimated by using $1.232 \, \text{RM}/\text{DM}$. We then correlate existing pulsar observations from the Australia Telescope National Facility with regions of enhanced thermal electron density and magnetic fields probed by ${^{12} \mathrm {CO}}$ data of molecular clouds, magnetic fields from the Zeeman splitting of the 21 cm line, neutral hydrogen column density, and H$α$ observations. Using these observational data, we show that the thermal electron density and magnetic fields are largely uncorrelated over kpc scales. Thus, we conclude that the relation $\langle B_\parallel \rangle = 1.232 \, \text{RM}/\text{DM}$ provides a good estimate of the magnetic field on Galactic scales but might break down on sub - kpc scales.
description: Accepted for publication in MNRAS; 18 pages (including one appendix), 13 figures (12 in the main text and 1 in the appendix), 6 tables in the main text
Elicitation - switch-reference
Creators: name: Piño Bonangué, José
name: Clem, Emily
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2024
Subjects: subject: amc

description: This bundle contains recordings and associated notes from an elicitation session conducted by Emily Clem with José Piño Bonangué. Topics covered include word order with complex nominals, negation, attitude reports, switch-reference, and relative clauses.
On the Convergence of the Electronic Structure Properties of the FCC Americium (001) Surface
Creators: name: Gao, Da
name: Ray, Asok K.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Electronic and magnetic properties of the fcc Americium (001) surface have been investigated via full-potential all-electron density-functional electronic structure calculations at both scalar and fully relativistic levels. Effects of various theoretical approximations on the fcc Am (001) surface properties have been thoroughly examined. The ground state of fcc Am (001) surface is found to be anti-ferromagnetic with spin-orbit coupling included (AFM-SO). At the ground state, the magnetic moment of fcc Am (001) surface is predicted to be zero. Our current study predicts the semi-infinite surface energy and the work function for fcc Am (001) surface at the ground state to be approximately 0.82 J/m2 and 2.93 eV respectively. In addition, the quantum size effects of surface energy and work function on the fcc Am (001) surface have been examined up to 7 layers at various theoretical levels. Results indicate that a three layer film surface model may be sufficient for future atomic and molecular adsorption studies on the fcc Am (001) surface, if the primary quantity of interest is the chemisorption energy.
description: 34 pages, 9 figures
Weakly interacting disordered Bose gases out of equilibrium: from multiple scattering to superfluidity
Creators: name: Scoquart, Thibault
name: Larré, Pierre-Élie
name: Delande, Dominique
name: Cherroret, Nicolas
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: We explore the quench dynamics of a two-dimensional, weakly interacting disordered Bose gas for various relative strengths of interactions and disorder. This allows us to identify two well distinct out-of-equilibrium regimes. When interactions are smaller than the disorder, the gas experiences multiple scattering and exhibits a short-range spatial coherence. At short time this coherence is only smoothly affected by interactions, via a diffusion process of the particles' energies. When interactions are larger than the disorder, scattering ceases and the gas behaves more and more like a fluid, ultimately like a superfluid at low energy. In the superfluid regime, the gas exhibits a long-range algebraic coherence, characteristic of a pre-thermal regime in disorder.
description: 6 pages, 4 figures
DEP Bulletin - 2025 - Volume 49 Issue 5
Creators: name: No Name Supplied
Publisher: name: No Publisher Supplied
Year: 2025

description: The DEP bulletin is a semi-monthly publication of the New Jersey Department of Environmental Protection. It contains a list of construction permit applications recently filed or acted upon by the Department along with a calendar of events of interest, a schedule of public hearings, and Environmental Impact Statements acted upon during the period.
CONDA-PM -- A Systematic Review and Framework for Concept Drift Analysis in Process Mining
Creators: name: Elkhawaga, Ghada
name: Abuelkheir, Mervat
name: Barakat, Sherif I.
name: Riad, Alaa M.
name: Reichert, Manfred
Publisher: name: arXiv
Year: 2020
Subjects: subject: Machine Learning (cs.LG)
subject: Artificial Intelligence (cs.AI)
subject: Software Engineering (cs.SE)
subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences

description: Business processes evolve over time to adapt to changing business environments. This requires continuous monitoring of business processes to gain insights into whether they conform to the intended design or deviate from it. The situation when a business process changes while being analysed is denoted as Concept Drift. Its analysis is concerned with studying how a business process changes, in terms of detecting and localising changes and studying the effects of the latter. Concept drift analysis is crucial to enable early detection and management of changes, that is, whether to promote a change to become part of an improved process, or to reject the change and make decisions to mitigate its effects. Despite its importance, there exists no comprehensive framework for analysing concept drift types, affected process perspectives, and granularity levels of a business process. This article proposes the CONcept Drift Analysis in Process Mining (CONDA-PM) framework describing phases and requirements of a concept drift analysis approach. CONDA-PM was derived from a Systematic Literature Review (SLR) of current approaches analysing concept drift. We apply the CONDA-PM framework on current approaches to concept drift analysis and evaluate their maturity. Applying CONDA-PM framework highlights areas where research is needed to complement existing efforts.
description: 45 pages, 11 tables, 13 figures
Functional Brain Imaging with Multi-Objective Multi-Modal Evolutionary Optimization
Creators: name: Krmicek, Vojtech
name: Sebag, Michèle
Publisher: name: arXiv
Year: 2006
Subjects: subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: Functional brain imaging is a source of spatio-temporal data mining problems. A new framework hybridizing multi-objective and multi-modal optimization is proposed to formalize these data mining problems, and addressed through Evolutionary Computation (EC). The merits of EC for spatio-temporal data mining are demonstrated as the approach facilitates the modelling of the experts' requirements, and flexibly accommodates their changing goals.
Testing a nearshore biophysical classification system
Creators: name: Morris, Mary
Publisher: name: University of British Columbia
Year: 2009

description: Habitat managers in BC have identified the need for a nearshore subtidal habitat classification system to inventory nearshore biophysical resources. The objective of this thesis was to develop a nearshore habitat model, as defined by algal assemblage, substrate, depth and wave exposure. The model for the Gabriola Island study area in the southern Strait of Georgia and representative of bedrock-dominated, semi-exposed coastline was developed from two existing datasets: 1) a systematically-quantified subtidal algal survey collected in the Gabriola area; and 2) a regional physical intertidal shore-zone mapping system. Algal assemblages were determined using TWINSPAN multivariate cluster analyses of the algal dataset, and nine subtidal algal assemblages were identified. The algal assemblages were linked to four specific substrate definitions and to four nearshore depth intervals: 0-2 m, 2-5 m, 5-10 m and 10-20 m. The physical shore-zone dataset was used to extrapolate the algal assemblage results by substrate and wave exposure. Predictions from the model for nearshore substrate and algal assemblages by depth interval were compared to independendy-collected observations from eight subtidal transects at Saltery Bay Provincial Park, approximately 80 km north of the Gabriola area, in the Strait of Georgia. The predictions for the nearshore substrate descriptions from the physical shorezone data at least partly-matched the observed substrate descriptions in 86% of comparisons. Predictions for the nearshore algal assemblages by depth interval and substrate, at least partlymatched the observed algal species assemblages every time when the substrate descriptions from transect observations were used as the basis for the prediction. The complete matches were 45% of the comparisons. When the predicted substrate was the basis for the predicted algal assemblages, matches and partial-matches dropped to 89% of the comparisons, and complete matches were only 24% of the comparisons. From the nearshore biophysical habitat model, algal assemblages can be predicted with the most confidence for three general habitat descriptions: 1) shallow ( < 5 m depth), immobile bedrock/boulder substrate, 2) shallow (<7 m), sand/mud/pebble substrate, and 3) deeper than 5 m, with continuous to scattered boulder/bedrock. General estimates of 'standing crop', calculated from the biological database for the general types 1) and 3) can be used together with mapped nearshore depth intervals and predicted substrate to provide a first approximation of nearshore biomasses for these assemblages. Although these represent a 'best guess' of algal standing crop, there are currently no systematic summaries of the nearshore environment. The nearshore subtidal biophysical habitat classification model can be used as a basis for a general regional summary of the nearshore habitat in the higher wave exposure areas of the southern Strait of Georgia.
Multiwell rigidity in nonlinear elasticity
Creators: name: Chermisi, Milena
name: Conti, Sergio
Publisher: name: arXiv
Year: 2008
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics
subject: 53C24 (Primary) 74B20 (Secondary)

description: We derive a quantitative rigidity estimate for a multiwell problem in nonlinear elasticity. Precisely, we show that if a gradient field is L^1-close to a set of the form SO(n)U_1 \cup ... \cup SO(n)U_l, and an appropriate bound on the length of the interfaces holds, then the gradient field is actually close to only one of the wells SO(n)U_i. The estimate holds for any connected subdomain, and has the optimal scaling.
description: 23 pages, 3 figures
Tumor Mutational Burden Associated with Response to Hyperthermic Intraperitoneal Chemotherapy
Creators: name: 崔书中(Cuishuzhong)
Publisher: name: CNGB
Year: 2022
Subjects: Variation
Multiisolate
Medical

description: Gastric cancer is one of the most common cancer types, especially in Asian countries. Hyperthermic Intraperitoneal Chemotherapy (HIPEC) has been shown to improve the progression-free survival among gastric cancer patients with peritoneal metastases, however, not all patients demonstrate response to HIPEC. Biomarkers are needed to select patients for effective treatment of HIPEC.
Atomium: A high-resolution view on the highly asymmetric wind of the AGB star Pi1 Gruis. I. First detection of a new companion and its effect on the inner wind
Creators: name: Homan, Ward
name: Montarges, Miguel
name: Pimpanuwat, Bannawit
name: Richards, Anita M. S.
name: Wallstrom, Sofia H. J.
name: Kervella, Pierre
name: Decin, Leen
name: Zijlstra, Albert
name: Danilovich, Taissa
name: de Koter, Alex
name: Menten, Karl
name: Sahai, Raghvendra
name: Plane, John
name: Lee, Kelvin
name: Waters, Rens
name: Baudry, Alain
name: Wong, Ka Tat
name: Millar, Tom J.
name: Van de Sande, Marie
name: Lagadec, Eric
name: Gobrecht, David
name: Yates, Jeremy
name: Price, Daniel
name: Cannon, Emily
name: Bolte, Jan
name: De Ceuster, Frederik
name: Herpin, Fabrice
name: Nuth, Joe
name: Sindel, Jan Philip
name: Kee, Dylan
name: Grey, Malcolm D.
name: Etoka, Sandra
name: Jeste, Manali
name: Gottlieb, Carl A.
name: Gottlieb, Elaine
name: McDonald, Iain
name: Mellah, Ileyk El
name: Muller, Holger S. P.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The nebular circumstellar environments of cool evolved stars are known to harbour a rich morphological complexity of gaseous structures on different length scales. A large part of these density structures are thought to be brought about by the interaction of the stellar wind with a close companion. The S-type asymptotic giant branch star Pi1 Gruis, which has a known companion at ~440 au and is thought to harbour a second, closer-by (<10 au) companion, was observed with the Atacama Large Millimeter/submillimeter Array as part of the ATOMIUM Large programme. In this work, the brightest CO, SiO, and HCN molecular line transitions are analysed. The continuum map shows two maxima, separated by 0.04'' (6 au). The CO data unambiguously reveal that Pi1 Gru's circumstellar environment harbours an inclined, radially outflowing, equatorial density enhancement. It contains a spiral structure at an angle of 38+/-3 deg with the line-of-sight. The HCN emission in the inner wind reveals a clockwise spiral, with a dynamical crossing time of the spiral arms consistent with a companion at a distance of 0.04'' from the asymptotic giant branch star, which is in agreement with the position of the secondary continuum peak. The inner wind dynamics imply a large acceleration region, consistent with a beta-law power of ~6. The CO emission suggests that the spiral is approximately Archimedean within 5'', beyond which this trend breaks down as the succession of the spiral arms becomes less periodic. The SiO emission at scales smaller than 0.5'' exhibits signatures of gas in rotation, which is found to fit the expected behaviour of gas in the wind-companion interaction zone. An investigation of SiO maser emission reveals what could be a stream of gas accelerating from the surface of the AGB star to the companion. Using these dynamics, we have tentatively derived an upper limit on the companion mass to be ~1.1 Msol.
description: 19 pages, 20 figures
ODIN: Automated Drift Detection and Recovery in Video Analytics
Creators: name: Suprem, Abhijit
name: Arulraj, Joy
name: Pu, Calton
name: Ferreira, Joao
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Machine Learning (cs.LG)
subject: Systems and Control (eess.SY)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Recent advances in computer vision have led to a resurgence of interest in visual data analytics. Researchers are developing systems for effectively and efficiently analyzing visual data at scale. A significant challenge that these systems encounter lies in the drift in real-world visual data. For instance, a model for self-driving vehicles that is not trained on images containing snow does not work well when it encounters them in practice. This drift phenomenon limits the accuracy of models employed for visual data analytics. In this paper, we present a visual data analytics system, called ODIN, that automatically detects and recovers from drift. ODIN uses adversarial autoencoders to learn the distribution of high-dimensional images. We present an unsupervised algorithm for detecting drift by comparing the distributions of the given data against that of previously seen data. When ODIN detects drift, it invokes a drift recovery algorithm to deploy specialized models tailored towards the novel data points. These specialized models outperform their non-specialized counterpart on accuracy, performance, and memory footprint. Lastly, we present a model selection algorithm for picking an ensemble of best-fit specialized models to process a given input. We evaluate the efficacy and efficiency of ODIN on high-resolution dashboard camera videos captured under diverse environments from the Berkeley DeepDrive dataset. We demonstrate that ODIN's models deliver 6x higher throughput, 2x higher accuracy, and 6x smaller memory footprint compared to a baseline system without automated drift detection and recovery.
Event-by-Event Fluctuations of Particle Ratios in Heavy-Ion Collisions
Creators: name: Tawfik, A.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We study event-by-event dynamical fluctuations of various particle ratios at different energies. We assume that particle production in final state is due to chemical equilibrium processes. We compare results from resonance gas model with available experimental data. At SPS energies, the model can very well reproduce the experimentally measured fluctuations. We make predictions for dynamical fluctuations of strangeness and non-strangeness particle ratios. We found that the energy-dependence is non-monotonic. Furthermore, we found that fluctuations strongly depend on particle ratios.
description: 6 pages, 2 figure, 1 table
INNOVATIONS IN THE SPHERE OF GREEN LOGISTICS. PART 1 (ИННОВАЦИИ В ОБЛАСТИ ЗЕЛЁНОЙ ЛОГИСТИКИ. ЧАСТЬ 1)
Creators: name: Osintsev, Nikita
name: Rakhmangulov, Aleksandr
name: Baginova, Vera
Publisher: name: figshare
Year: 2021
Subjects: subject: 99999 Engineering not elsewhere classified
subject: FOS: Other engineering and technologies

description: In the last decade, the scientific researches focused on improvement of environmental friendliness and based on the principles of sustainable development, has been developed in transport sector, and this is «green» logistics. The article presents an overview of the research in this area using as an example foreign and Russian projects. It is shown that the existing approaches, methods and instruments of «green» logistics are scattered, their use leads to making contradictory decisions that do not contribute to a systematic reduction of the harmful impact of transport on the environment. The authors proposed their approach to systematization of principles and methods of «green» logistics, which will allow creating more balanced programs to improve the environmental friendliness and efficiency of transport systems. Keywords: transport, sustainable development, green logistics, logistics, ecology, environment.В последнее десятилетие на транспорте утвердилось научное направление, ориентированное на повышение экологичности и основанное на принципах устойчивого развития, - «зелёная» логистика. В статье представлен обзор исследований в этой области на примере зарубежных и российских проектов. Показано, что существующие подходы, методы и инструменты «зелёной» логистики носят разрозненный характер, их использование приводит к принятию противоречивых решений, не способствующих планомерному снижению вредного воздействия транспорта на окружающую среду. Авторами предложен свой подход к систематизации принципов и методов «зелёной» логистики, который позволит формировать более сбалансированные программы повышения экологичности и эффективности функционирования транспортных систем.
Reduction of back switching by large damping ferromagnetic material
Creators: name: Taniguchi, Tomohiro
name: Shiokawa, Yohei
name: Sasaki, Tomoyuki
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: Recent studies on magnetization dynamics induced by spin-orbit torque have revealed a weak dependence of the critical current for magnetization switching on the damping constant of a ferromagnetic free layer. This study, however, reveals that the damping constant nevertheless plays a key role in magnetization switching induced by spin-orbit torque. An undesirable switching, returning to an initial state, named as back switching, occurs in a ferromagnet with an easy axis parallel to the current direction. Numerical and theoretical analyses reveal that back switching is strongly suppressed when the damping constant of the ferromagnet is large.
description: 5 pages, 4 figures
Elicitation - switch-reference
Creators: name: Sampi Ríos, Celia
name: Clem, Emily
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2024
Subjects: subject: amc

description: This bundle contains recordings and associated notes from an elicitation session conducted by Emily Clem with Celia Sampi Ríos. Topics covered include word order with complex nominals, negation, attitude reports, switch-reference, and relative clauses.
Radiative transfer problem in dusty galaxies: a program suite
Creators: name: Semionov, D.
name: Vansevicius, V.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present a program suite for the radiative transfer problem solution in axi-symmetrical dusty galaxy disks, intended primarily for spectrophotometric analysis of stellar populations by means of integrated and differential photometry. The solution is obtained using a 2D ray-tracing algorithm at a discrete wavelength set, emphasizing careful treatment of the effects of light scattering by interstellar dust grains. The program has been thoroughly tested and shows the performance and accuracy comparable to or better than other codes currently in use for astrophysical radiative transfer. The program's source code and example model files are available at http://www.astro.lt/~dima/gfe/ .
description: 4 pages, 1 figure, published in Baltic Astronomy
Atom Tunneling in the Hydroxylation Process of Taurine/$α$-Ketoglutarate Dioxygenase Identified by Quantum Mechanics/Molecular Mechanics Simulations
Creators: name: Álvarez-Barcia, Sonia
name: Kästner, Johannes
Publisher: name: arXiv
Year: 2020
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: TauD dioxygenase is one of the most studied $α$-ketoglutarate dependent dioxygenases ($α$KGDs), involved in several biotechnological applications. We investigated the key step in the catalytic cycle of the $α$KGDs, the hydrogen transfer process, by a QM/MM approach (B3LYP/CHARMM22). Analysis of the charge and spin densities during the reaction demonstrates that a concerted mechanism takes place, where the H atom transfer happens simultaneously with the electron transfer from taurine to the Fe=O cofactor. We found quantum tunneling of the hydrogen atom to increase the rate constant by a factor of 40 at 5\textcelsius{}. As a consequence a quite high KIE value of close to 60 is obtained, which is consistent with the experimental value.
The construction of Dirac wave packets for a fermionic particle non-minimally coupling with an external magnetic field
Creators: name: Bernardini, Alex E.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We shall proceed with the construction of normalizable Dirac wave packets for {\em fermionic} particles (neutrinos) with dynamics governed by a ``modified'' Dirac equation with a non-minimal coupling with an external magnetic field. We are not only interested on the analytic solutions of the ``modified'' Dirac wave equation but also on the construction of Dirac wave packets which can be used for describing the dynamics of some observable physical quantities which are relevant in the context of the quantum oscillation phenomena. To conclude, we discuss qualitatively the applicability of this formal construction in the treatment of chiral (and flavor) oscillations in the theoretical context of neutrino physics.
description: 10 pages
Pulse-width and Temperature Dependence of Memristive Spin-Orbit Torque Switching
Creators: name: Liao, Wei-Bang
name: Chen, Tian-Yue
name: Hsiao, Yu-Chan
name: Pai, Chi-Feng
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: It is crucial that magnetic memory devices formed from magnetic heterostructures possess sizable spin-orbit torque (SOT) efficiency and high thermal stability to realize both efficient SOT control and robust storage of such memory devices. However, most previous studies on various types of magnetic heterostructures have focused on only their SOT efficiencies, whereas the thermal stabilities therein have been largely ignored. In this work, we study the temperature-dependent SOT and stability properties of two types of W-based heterostructures, namely W/CoFeB/MgO (standard) and CoFeB/W/CoFeB/MgO (field-free), from 25 ^{\circ}C (298 K) to 80 ^{\circ}C (353 K). Via temperature-dependent SOT characterization, the SOT efficacies for both systems are found to be invariant within the range of studied temperatures. Temperature-dependent current-induced SOT switching measurements further show that the critical switching current densities decrease with respect to the ambient temperature; thermal stability factors (Δ) are also found to degrade as temperature increases for both standard and field-free systems. The memristive SOT switching behaviors in both systems with various pulse-widths and temperatures are also examined. Our results suggest that although the SOT efficacy is robust against thermal effects, the reduction of Δ at elevated temperatures could be detrimental to standard memory as well as neuromorphic (memristive) device applications.
Monte Carlo renormalization group calculation for the d=3 Ising Model using a modified transformation
Creators: name: Ron, D.
name: Brandt, A.
name: Swendsen, R. H.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We present a simple approach to high-accuracy calculations of critical properties for the three-dimensional Ising model, without prior knowledge of the critical temperature. The iterative method uses a modified block-spin transformation with a tunable parameter to improve convergence in the Monte Carlo renormalization group trajectory. We found experimentally that the iterative method enables the calculation of the critical temperature simultaneously with a critical exponent.
description: 4 pages. arXiv admin note: text overlap with arXiv:1703.02430
Multiplicity of photohadronization and photon--hadron scaling violation
Creators: name: Novoseltsev, Yury
name: Novoseltseva, Rita
name: Vereshkov, Grigory
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The method of scaling transformations permitting to carry out the reconstruction of cross sections of $γN$ and $γγ$ interactions on the basis of cross sections of nucleon-(anti)nucleon interactions is suggested. The photon--hadron scaling violation is a consequence of dependence of scaling transformation parameter $\bar n(s)$ on the energy. The universal function $\bar n(s)$ is interpreted as the multiplicity of photohadronization. This function is established by processing the data on $γp$ cross sections in the low energy region $\sqrt{s}< 20 \GeV$ and is extrapolated to the high energy region up to $\sqrt{s}\sim 200 \GeV$. The results of the reconstruction of $γN$ cross sections at high energies and of $γγ$ ones at all energies are in a remarkable agreement with available experimental data.
description: 5 pages, 3 figures; v2: reference corrected
Slots or resources? It depends on the type of visual memory
Creators: name: Rossi, Marta
name: Pinto, Yair
Publisher: name: F1000Research
Year: 2015

description: Is short term memory essentially based on slots or resources? The slot model claims that there are a limited number of slots with a fixed precision, while the resource model posits that resources can be distributed gradually, causing a trade-off between capacity and precision.

The current research investigated this topic in a change detection task with oriented bars. To evaluate the precision of the memory representation we varied the size of the change (30°, 60°, or 90°). Furthermore we precued a location, to evoke different attentional strategies.

We focused on two types of short-term visual memory, Fragile Memory (FM), and Visual working memory (WM). FM is the visual memory available before visual interference, and WM is the memory available after visual interference. It is generally found that FM has a much richer capacity than WM.

Interestingly, we found that for FM, precision at the invalidly precued and uncued locations was similar. In contrast, for WM precision at the invalidly precued location was lower than precision at the uncued locations. This suggests that the slots or resources debate may not yield one answer. FM may be based on slots with a fixed precision, while WM may be based on limited resources.
title: Radiation induced meningioma: A case report
Creators: name: Madhariya, Vaishali
Publisher: name: EURORAD
Year: 2024
Subjects: subject: Neuroradiology
subject: Neuroradiology brain
subject: MR
subject: Clinical Case

description: Clinical History: 28-year-old man was operated ten years back for left frontal anaplastic astrocytoma, followed by radiotherapy to a dose of 59.4Gy/33# and adjuvant temozolomide, and was kept on yearly follow-up.

Six years after treatment completion, surveillance magnetic resonance imaging (MRI) showed a new onset lesion in right parasagittal region.

description: 28 years, male
Tunneling Rate Constants for H2CO+H on Amorphous Solid Water Surfaces
Creators: name: Song, Lei
name: Kästner, Johannes
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Formaldehyde (H2CO) is one of the most abundant molecules observed in the icy mantle covering interstellar grains. Studying its evolution can contribute to our understanding of the formation of complex organic molecules in various interstellar environments. In this work, we investigated the hydrogenation reactions of H2CO yielding CH3O, CH2OH, and the hydrogen abstraction resulting in H2+HCO on an amorphous solid water (ASW) surface using a quantum mechanics/molecular mechanics (QM/MM) model. The binding energies of H2CO on the ASW surface vary broadly, from 1000 to 9370 K. No correlation was found between binding energies and activation energies of hydrogenation reactions. Combining instanton theory with QM/MM modeling, we calculated rate constants for the Langmuir Hinshelwood and the Eley Rideal mechanisms for the three product channels of H+H2CO surface reactions down to 59 K. We found that the channel producing CH2OH can be ignored, owing to its high activation barrier leading to significantly lower rates than the other two channels. The ASW surface influences the reactivity in favor of formation of CH3O (branching ratio 80%) and hinders the H2CO dissociation into H2+HCO. In addition, kinetic isotope effects are strong in all reaction channels and vary strongly between the channels. Finally, we provide fits of the rate constants to be used in astrochemical models.
Characterizations of Herglotz-Nevanlinna functions using positive semi-definite functions and the Nevanlinna kernel in several variables
Creators: name: Nedic, Mitja
Publisher: name: arXiv
Year: 2020
Subjects: subject: Complex Variables (math.CV)
subject: FOS: Mathematics
subject: 32A26, 32A99

description: In this paper, we give several characterizations of Herglotz-Nevanlinna functions in terms of a specific type of positive semi-definite functions called Poisson-type functions. This allows us to propose a multidimensional analogue of the classical Nevanlinna kernel and a definition of generalized Nevanlinna functions in several variables. Furthermore, a characterization of the symmetric extension of a Herglotz-Nevanlinna function is also given. The subclass of Loewner functions is also discussed, as well as an interpretation of the main result in terms of holomorphic functions on the unit polydisk with non-negative real part.
description: 24 pages
DNA toroids form via a flower intermediate
Creators: name: McMillan, Ryan B.
name: Bediako, Hilary
name: Devenica, Luka M.
name: Ma, Yuxing E.
name: Roscoe, Donna M.
name: Carter, Ashley R.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Biological Physics (physics.bio-ph)
subject: FOS: Physical sciences

description: DNA in sperm cells must undergo an extreme compaction to almost crystalline packing levels. To produce this dense packing, DNA is condensed by protamine, a positively charged protein that loops the DNA into a toroid. Our goal is to determine the pathway and mechanism for toroid formation. We first imaged short-length (L=217-1023 nm) DNA molecules in 0-5.0 $μ$M protamine using an atomic force microscope (AFM). At low protamine concentrations (0.2-0.6 $μ$M), molecules dramatically condensed, folding into a flower structure. Dynamic folding measurements of the DNA using a tethered particle motion (TPM) assay revealed a corresponding, initial folding event, which was >3 loops at L=398 nm. The initial folding event was made up of smaller (<1 loop) events that had similar dynamics as protamine-induced bending. This suggests that flowers form in an initial step as protamine binds and bends the DNA. It was not until higher protamine concentrations (>2 $μ$M) that DNA in the AFM assay formed small (<10 loop), vertically packed toroids. Taken together, these results lead us to propose a nucleation-growth model of toroid formation that includes a flower intermediate. This pathway is important in both in vivo DNA condensation and in vitro engineering of DNA nanostructures.
description: 24 pages and 7 figures in main article, 15 pages and 9 figures in supplemental
Dynamical twists in Hopf algebras
Creators: name: Mombelli, Juan Martin
Publisher: name: arXiv
Year: 2007
Subjects: subject: Quantum Algebra (math.QA)
subject: Rings and Algebras (math.RA)
subject: FOS: Mathematics
subject: 16W30

description: We establish a bijective correspondence between gauge equivalence classes of dynamical twists in a finite-dimensional Hopf algebra $H$ based on a finite abelian group $A$ and equivalence classes of pairs $(K, \{V_λ\}_{λ\in \hat{A}})$, where $K$ is an $H$-simple left $H$-comodule semisimple algebra and $\{V_λ\}_{λ\in \hat{A}}$ is a family of irreducible representations satisfying certain conditions. Our results generalize the results obtained by Etingof-Nikshych on the classification of dynamical twists in group algebras.
description: 21 pages, minor misprints corrected, to appear in Int. Math. Res. Not
On Stable Non-Supersymmetric Vacua at the Bottom of Cascading Theories
Creators: name: Argurio, Riccardo
name: Bertolini, Matteo
name: Closset, Cyril
name: Cremonesi, Stefano
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We consider a wide class of cascading gauge theories which usually lead to runaway behaviour in the IR, and discuss possible deformations of the superpotential at the bottom of the cascade which stabilize the runaway direction and provide stable non-supersymmetric vacua. The models we find may allow for a weakly coupled supergravity analysis of dynamical supersymmetric breaking in the context of the gauge/string correspondence.
description: 23 pages, 8 figures. V2: minor comments and ref added
Managing Self-Phase Modulation in Pseudolinear Multimodal and Monomodal Systems
Creators: name: Zitelli, M.
name: Ferraro, M.
name: Mangini, F.
name: Wabnitz, S.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Optics (physics.optics)
subject: Pattern Formation and Solitons (nlin.PS)
subject: FOS: Physical sciences

description: We propose a new semi-analytical model, describing the bandwidth evolution of pulses propagating in dispersion managed (DM) transmission systems using multimodal graded-index fibers (GRIN) with parabolic index. The model also applies to monomodal fiber DM systems, representing the limit case where beam self-imaging vanishes. The model is successfully compared with the direct integration of the (1+1)D nonlinear Schrödinger equation for parabolic GRIN fibers, and to experimental results performed by using the transmission of femtosecond pulses over a 5 m span of GRIN fiber. At the high pulse powers that are possible in multimodal fibers, the pulse bandwidth variations produced by the interplay of cumulated dispersion and self-phase modulation can become the most detrimental effect, if not properly managed. The analytical model, numerical and experimental results all point to the existence of an optimal amount of chromatic dispersion, that must be provided to the input pulse, for obtaining a periodic evolution of its bandwidth. Results are promising for the generation of spatio-temporal DM solitons in parabolic GRIN fibers, where the stable, periodic time-bandwidth behaviour that was already observed in monomodal systems is added to the characteristic spatial beam self-imaging.
Elicitation - questions and switch-reference
Creators: name: Soria Pérez, Celia
name: Clem, Emily
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2024
Subjects: subject: amc

description: This bundle contains recordings and associated notes from an elicitation session conducted by Emily Clem with Celia Soria Pérez. Topics covered include switch-reference (including with questions), scope, and questions with relative clauses.
The gauge boson masses for a minimal $SU(4)_{EW} \otimes U(1)_{B-l}$ model for electroweak interactions with left-right symmetry
Creators: name: Bernardini, Alex E.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Gauge boson masses for a minimal $SU(4)_{EW} \otimes U(1)_{B-l}$ model]{Following the general procedure of spontaneous symmetry breaking of a $SU(4)_{EW} \otimes U(1)_{B-l}$ electroweak gauge group with left-right symmetry, we obtain the gauge boson masses and currents for the minimal version of the model. The physical eigenstates for neutral gauge bosons are determined by introducing two mixing angles $θ_4$ and $θ_3$ which are related to the electroweak mixing angle $θ_w$ at the unification scale. By introducing some physical approaches in order to simplify the calculations, we calculate the charged and neutral currents. Differently from other previous propositions, the results are obtained from a theoretical constraint upon the coupling constants as a consequence of embedding the symmetry into the Pati-Salam electroweak coupling $SU(4)_{EW} \otimes SU(4)_{PS}$.
description: 21 pages
Unraveling the dynamics and kinematics of GRB hosts with high resolution spectroscopy
Creators: name: Thoene, Christina C.
name: Fynbo, Johan P. U.
name: Christensen, Lise
name: Wiersema, Klaas
name: Bloom, Joshua S.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: In the last years the research on GRB host galaxies has proceeded to more detailed studies both using high resolution afterglow spectroscopy and spatially resolved spectra of nearby hosts. High resolution spectra give a detailed picture of the kinematic properties of matter along the line-of-sight in the host. Two afterglow spectra show clear indications for outflows from their host, namely GRB 030329 and GRB 060206, derived from the position of absorption and host emission lines, nonvariability of Mg I and the radiation field calculated from fine-structure line detections. In nearby GRB hosts it is possible to resolve the actual GRB site. GRB 060505, a SN-less GRB, originated in a relatively metal poor, star forming region with similar properties as other long-duration hosts. A similar conclusion is reached for the site of GRB 980425/SN 1998bw.
description: 4 pages, 4 figures; to be published in the proceedings of ''Gamma Ray Bursts 2007'', Santa Fe, New Mexico, November 5-9; new version: minor language issue fixed
An orbital-based representation for accurate Quantum Machine Learning
Creators: name: Karandashev, Konstantin
name: von Lilienfeld, O. Anatole
Publisher: name: arXiv
Year: 2021
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: We introduce an electronic structure based representation for quantum machine learning (QML) of electronic properties throughout chemical compound space. The representation is constructed using computationally inexpensive ab initio calculations and explicitly accounts for changes in the electronic structure. We demonstrate the accuracy and flexibility of resulting QML models when applied to property labels such as total potential energy, HOMO and LUMO energies, ionization potential, and electron affinity, using as data sets for training and testing entries from the QM7b, QM7b-T, QM9, and LIBE libraries. For the latter, we also demonstrate the ability of this approach to account for molecular species of different charge and spin multiplicity, resulting in QML models that infer total potential energies based on geometry, charge, and spin as input.
Surjectivity of quotient maps for algebraic $(\mathbb{C},+)$-actions and polynomial maps with contractible fibres
Creators: name: Bonnet, Philippe
Publisher: name: arXiv
Year: 2006
Subjects: subject: Algebraic Geometry (math.AG)
subject: Commutative Algebra (math.AC)
subject: FOS: Mathematics
subject: 14L24

description: In this paper, we establish two results concerning algebraic $(\mathbb{C},+)$-actions on $\mathbb{C}^n$. First let $ϕ$ be an algebraic $(\mathbb{C},+)$-action on $\mathbb{C}^3$. By a result of Miyanishi, its ring of invariants is isomorphic to $\mathbb{C}[t_1,t_2]$. If $f_1,f_2$ generate this ring, the quotient map of $ϕ$ is the map $F:\mathbb{C}^3\to \mathbb{C}^2$, $x\mapsto (f_1(x),f_2(x))$. By using some topological arguments, we prove that $F$ is always surjective. Second, we are interested in dominant polynomial maps $F:\mathbb{C}^n\to \mathbb{C}^{n-1}$ whose connected components of their connected fibres are contractible. For such maps, we prove the existence of an algebraic $(\mathbb{C},+)$-action $ϕ$ on $\mathbb{C}^n$ for which $F$ is invariant. Moreover we give some conditions so that $F^*(\mathbb{C}[t_1,...,t_{n-1}])$ is the ring of invariants of $ϕ$.
description: 12 pages
Vibrational analysis of methyl cation - rare gas atom complexes: CH$_3^+$-Rg (Rg=He, Ne, Ar, Kr)
Creators: name: Meisner, Jan
name: Hallmen, Philipp P.
name: Kästner, Johannes
name: Rauhut, Guntram
Publisher: name: arXiv
Year: 2020
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: The vibrational spectra of simple CH$_3^+$-Rg (Rg=He, Ne, Ar, Kr) complexes have been studied by vibrational configuration interaction (VCI) theory relying on multidimensional potential energy surfaces (PES) obtained from explicitly correlated coupled cluster calculations, CCSD(T)-F12a. In agreement with experimental results, the series of rare gas atoms leads to rather unsystematic results and indicates huge zero point vibrational energy effects for the helium complex. In order to study these sensitive complexes more consistently, we also introduce configuration averaged vibrational self-consistent field theory (CAVSCF), which is a generalization of standard VSCF theory to several configurations. The vibrational spectra of the complexes are compared to that of the methyl cation, for which corrections due to scalar-relativistic effects, high-level coupled-cluster terms, i.e. CCSDTQ, and core-valence correlation have explicitly been accounted for. The occurrence of tunneling splittings for the vibrational ground-state of CH$_3^+$-He has been investigated on the basis of semiclassical instanton theory. These calculations and a direct comparison of the energy profiles along the intrinsic reaction coordinates (IRC) with that of the hydronium cation, H$_3$O$^+$, suggest that tunneling effects for vibrationally excited states should be very small.