cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Natal dispersal and post-weaning survival of juvenile snowshoe hares during a cycle population increase
Creators: name: Gillis, Elizabeth A.
Publisher: name: University of British Columbia
Year: 2009

description: Juvenile snowshoe hares (Lepus americanus) in southwestern Yukon were monitored using radio telemetry to determine the effects of litter group on natal dispersal and postweaning survival. A total of 84 juveniles representing the four litter groups bom in 1995 were monitored from June 1995 to April 1996 on control areas and areas in which supplemental food was provided. Natal dispersal distance, age and date of emigration, survival rate, and proximate cause of death were examined. Natal dispersal distances (distance from nest site to site of first breeding) of hares ranged from 23 m to over 16 km. Fifty percent (9/18) of juveniles whose nest sites were known and survived until their first breeding season were classified as emigrants (dispersed a distance further than two adult home range diameters). Emigrants did not suffer significantly higher mortality than those individuals which did not emigrate. Neither dispersal distance nor the proportion of hares which emigrated differed between food addition and control areas. On the control areas, there was no evidence of sex-biased natal dispersal. However, on the food addition areas, a higher proportion of males than females emigrated and males dispersed significantly farther than females. This pattern possibly resulted from the increased population density on the food addition areas. Age at emigration varied from 31 days to 140 days, but was not related to the sex of the individuals. Food addition had no observable effect on emigration age, however there was a significant effect of litter group. Third litter juveniles emigrated at an older mean age (84 days) than first (48 days) and second (42 days) litter juveniles. Twenty-eight day survival did not differ between food addition and control areas for any litter group. Over the study period, 28-day survival of juveniles (all litters combined) did not differ significantly from adults (juveniles: 0.91, adults: 0.93). However, when examined by litter group, third litter survival was significantly lower than adult and second litter survival, while fourth litter survival was significantly lower than adult, first, and second litter survival. These differences were the result of differential survival among the litter groups during a three month period in the fall (September-November). Predation was the primary proximate cause of death for weaned juvenile hares, accounting for 86% (37/43) of deaths. Although the dominant predators of juvenile snowshoe hares were annual residents, avian predation was low after November while mammalian predation was constant from mid-August through April. No collared weaned juveniles died before mid-August.
Low-frequency Selection Switch based Cell-to-Cell Battery Voltage Equalizer with Reduced Switch Count
Creators: name: Dam, Shimul K
name: John, Vinod
Publisher: name: arXiv
Year: 2020
Subjects: subject: Systems and Control (eess.SY)
subject: Signal Processing (eess.SP)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: A selection switch based cell-to-cell voltage equalizer requires only one dual-port dc-dc converter shared by all the cells. A cell-to-cell voltage equalizer is proposed that utilizes a capacitively level-shifted Cuk converter and low-frequency cell selection switches. The absence of isolation transformer and diodes in the equalizer leads to high efficiency, and the use of low-frequency selection switches significantly reduces the cost of the drive circuits. A low-frequency cell selection network is proposed using bipolar voltage buses, where the switch count is almost half, compared to the existing low-frequency cell-to-cell equalizers for the case of a large number of cells. A novel approach for cell voltage recovery compensation is proposed, which reduces the number of operations of the selection switches and the equalization time. The proposed equalizer is implemented with relays and verified with an 8-cell Li-ion stack. The developed prototype shows the efficiency of over 90\% and good voltage balancing performance during charging, discharging, and varying load conditions. Experimental results also show about one order of magnitude reduction in the number of relay switchings and a significant reduction in equalization time using the proposed voltage compensation.
A novel method for fatigue testing of MEMS devices containing movable elements
Creators: name: Szucs, Z.
name: Rencz, M.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Other Computer Science (cs.OH)
subject: FOS: Computer and information sciences

description: In this paper we present an electronic circuit for position or capacitance estimation of MEMS electrostatic actuators based on a switched capacitor technique. The circuit uses a capacitive divider configuration composed by a fixed capacitor and the variable capacitance of the electrostatic actuator for generating a signal that is a function of the input voltage and capacitive ratio. The proposed circuit can be used to actuate and to sense position of an electrostatic MEMS actuator without extra sensing elements. This approach is compatible with the requirements of most analog feedback systems and the circuit topology of pulsed digital oscillators (PDO).
description: Submitted on behalf of EDA Publishing Association (http://irevues.inist.fr/EDA-Publishing)
Integration of bounded monotone functions: Revisiting the nonsequential case, with a focus on unbiased Monte Carlo (randomized) methods
Creators: name: Basak, Subhasish
name: Bect, Julien
name: Vazquez, Emmanuel
Publisher: name: arXiv
Year: 2022
Subjects: subject: Numerical Analysis (math.NA)
subject: Statistics Theory (math.ST)
subject: FOS: Mathematics

description: In this article we revisit the problem of numerical integration for monotone bounded functions, with a focus on the class of nonsequential Monte Carlo methods. We first provide new a lower bound on the maximal $L^p$ error of nonsequential algorithms, improving upon a theorem of Novak when p > 1. Then we concentrate on the case p = 2 and study the maximal error of two unbiased methods-namely, a method based on the control variate technique, and the stratified sampling method.
คดีมลพิษ: ความเสียหายและการเยียวยาในระบบกฎหมายไทย
Creators: name: สมชาย ปรีชาศิลปกุล
Publisher: name: คณะนิติศาสตร์ มหาวิทยาลัยเชียงใหม่
Year: 2004

description: 1, 2, วารสารนิติสังคมศาสตร์
Nanofluidic trapping and enhanced Raman detection of single biomolecules in plasmonic bowl-shaped nanopore
Creators: name: Zhao, Yingqi
name: Hubarevich, Aliaksandr
name: Huang, Jian-An
name: De Angelis, Francesco
Publisher: name: arXiv
Year: 2022
Subjects: subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: Solid-state nanopores are emerging platforms for single-molecule protein sequencing due to their tolerance to hash physiology environment and compatibility with different electrical and optical detection methods. However, they suffer from poor molecular manipulations that were twisted with and thus limited by the detection methods. Here, we report a bowl-shaped plasmonic gold nanopore on silicon nitride with hydrogel to demonstrate near-field nanofluidic manipulation of DNA translocation for plasmon-enhanced Raman spectroscopic detection. The hydrogel linearized the DNA, and the linear DNA was trapped in the nanopore for tens of seconds due assumably to bipolar effect of the nanopore that generate electroosmotic sheath flow and bipolar surface charge distribution. Their combination led to a near-field confinement of the DNA in the nanopore hot spot to allow stable Raman detection. We envision that a combination of Raman spectroscopy with the bowl-shaped nanopores can succeed in single-molecule protein sequencing in a label-free way
Quasi-exact minus-quartic oscillators in strong-core regime
Creators: name: Znojil, Miloslav
Publisher: name: arXiv
Year: 2006
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: PT-symmetric potentials $V({x}) = -{x}^4 +jB {x}^3 + C {x}^2+jD {x} +jF/{x} +G/{x}^2$ are quasi-exactly solvable, i.e., a specific choice of a small $G=G^{(QES)}= integer/4$ is known to lead to wave functions $ψ^{(QES)}(x)$ in closed form at certain charges $F=F^{(QES)}$ and energies $E=E^{(QES)}$. The existence of an alternative, simpler and non-numerical version of such a construction is announced here in the new dynamical regime of very large $G^{(QES)} \to \infty$.
Correlating the transport of precipitable water vapor with rainfall in a complex orographic environment before, during and after a typhoon: Case study of typhoon Morakot
Creators: name: Almanza, Vanessa
name: Kuo, Ying-Hwa
name: Schreiner, William
name: Braun, John
name: Hunt, Douglas
name: Lorenz, Reta
name: Sizer, Bonnie
name: Connolly-Brown, Eowyn
Publisher: name: University Corporation For Atmospheric Research (UCAR)
Year: 2010

On August 7, 2009 typhoon Morakot struck Taiwan producing 1504 mm of rain in a 24- hour period, making it the second largest rainfall event recorded. The flooding and landslides associated with Morakot claimed more than 700 lives and caused major damage in Taiwan. In-situ observations of precipitable water vapor (PWV) from 82 GPS stations and 450 rain gauges operated by the Taiwanese Central Weather Bureau (CWB) captured the significant features of this storm as it struck the island nation. Forecasts of this storm made using the Advanced Weather Research Forecast model (WRF-ARW) failed to resolve heavy localized rainfall associated with Taiwan's complex topography and had subtle. This research compared model generated PWV and rainfall to in-situ data to evaluate the performance of the WRF-ARW during the passage of Morakot. The vast distribution of GPS provided reliable PWV estimations which proved useful in verifying model PWV in complex terrain. Coupling of GPS PWV and rain gauge stations also helped diagnose the mesoscale structure of the rain around the Central Mountain Region (CMR) of Taiwan. This study provides a better understanding of how complex terrain influences heavy localized precipitation and PWV distribution before, during and after typhoon Morakot. It is hypothesized that a finer resolution terrain model and modified precipitation parameterizations could improve the WRF-ARW rainfall prediction.
Adversarial decision strategies in multiple network phased oscillators: the Blue-Green-Red Kuramoto-Sakaguchi model
Creators: name: Zuparic, Mathew
name: Angelova, Maia
name: Zhu, Ye
name: Kalloniatis, Alexander
Publisher: name: arXiv
Year: 2020
Subjects: subject: Adaptation and Self-Organizing Systems (nlin.AO)
subject: Physics and Society (physics.soc-ph)
subject: FOS: Physical sciences

description: We consider a model of three interacting sets of decision-making agents, labeled Blue, Green and Red, represented as coupled phased oscillators subject to frustrated synchronisation dynamics. The agents are coupled on three networks of differing topologies, with interactions modulated by different cross-population frustrations, internal and cross-network couplings. The intent of the dynamic model is to examine the degree to which two of the groups of decision-makers, Blue and Red, are able to realise a strategy of being ahead of each others' decision-making cycle while internally seeking synchronisation of this process -- all in the context of further interactions with the third population, Green. To enable this analysis, we perform a significant dimensional reduction approximation and stability analysis. We compare this to a numerical solution for a range of internal and cross-network coupling parameters to investigate various synchronisation regimes and critical thresholds. The comparison reveals good agreement for appropriate parameter ranges. Performing parameter sweeps, we reveal that Blue's pursuit of a strategy of staying too-far ahead of Red's decision cycles triggers a second-order effect of the Green population being ahead of Blue's cycles. This behaviour has implications for the dynamics of multiple interacting social groups with both cooperative and competitive processes.
description: 25 pages, 9 figures
Noise and thermal stability of vibrating micro-gyrometers preamplifiers
Creators: name: Levy, R.
name: Dupret, A.
name: Mathias, H.
name: Gilles, J. -P.
name: Parrain, F.
name: Eisenbeis, B.
name: Megherbi, S.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Other Computer Science (cs.OH)
subject: FOS: Computer and information sciences

description: The preamplifier is a critical component of gyrometer's electronics. Indeed the resolution of the sensor is limited by its signal to noise ratio, and the gyrometer's thermal stability is limited by its gain drift. In this paper, five different kinds of preamplifiers are presented and compared. Finally, the design of an integrated preamplifier is shown in order to increase the gain stability while reducing its noise and size.
description: Submitted on behalf of EDA Publishing Association (http://irevues.inist.fr/EDA-Publishing)
An investigation into the spatiotemporal scale of two wind ramp events in northeastern Colorado
Creators: name: Aguilar, Theresa
name: Mahoney, William
name: Liu, Yubao
name: Liu, Yuewei
name: Margolis, Tom
Publisher: name: University Corporation For Atmospheric Research (UCAR)
Year: 2010

A sudden surge or drop in wind speed, and consequently in wind power, over a brief period of time broadly defines a wind ramp (WR) event. Predicting the magnitude and timing of WR events is crucial for wind power integration into the electric grid. By exploring WR events, a better understanding of their characteristics can be acquired and later employed in wind energy forecasting. This research investigated the spatiotemporal evolution of the wind fields associated with two WR events, within a 48 hr. time period, by using a high-resolution observing network (7-surface stations at 10 m, 1-multilevel meteorological tower, and a wind profiler with 46 measurement heights). This network encircled a cluster of wind farms in northeastern Colorado. It was found that the WR events were associated with a mid-latitude cyclone that moved eastward from Montana. The first WR event was produced by a low-level jet (LLJ) which formed ahead of the cyclone and the second event was generated by the passage of a cold front (CF). The LLJ WR event featured a slow ramp up in the nighttime followed by a ramp down after sunrise when the LLJ weakened. The CF WR event ramped up rapidly with persistently strong winds at all heights. The two WR events also demonstrated very different wind profile characteristics in the lower 100 meters. The LLJ resulted in a highly sheared wind profile while the cold front resulted in a well-mixed layer. Overall, different and highly-variable characteristics were observed in each WR event. Further analyses are needed to understand the driving factors that lead to the observed spatiotemporal variations.
Hein, Markus: Franz Lau (1907-1973) Pfarrer, Landessuperintendent und Kirchenhistoriker
Creators: name: Röhrig, Hermann-Josef
Publisher: name: Ökumenische Rundschau
Year: 2025

description: Ökumenische Rundschau, Bd. 61 Nr. 3 (2012): Ökumenische Rundschau, Band 61, Heft 3
Sliced gradient-enhanced Kriging for high-dimensional function approximation
Creators: name: Cheng, Kai
name: Zimmermann, Ralf
Publisher: name: arXiv
Year: 2022
Subjects: subject: Machine Learning (stat.ML)
subject: Statistics Theory (math.ST)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics

description: Gradient-enhanced Kriging (GE-Kriging) is a well-established surrogate modelling technique for approximating expensive computational models. However, it tends to get impractical for high-dimensional problems due to the size of the inherent correlation matrix and the associated high-dimensional hyper-parameter tuning problem. To address these issues, a new method, called sliced GE-Kriging (SGE-Kriging), is developed in this paper for reducing both the size of the correlation matrix and the number of hyper-parameters. We first split the training sample set into multiple slices, and invoke Bayes' theorem to approximate the full likelihood function via a sliced likelihood function, in which multiple small correlation matrices are utilized to describe the correlation of the sample set rather than one large one. Then, we replace the original high-dimensional hyper-parameter tuning problem with a low-dimensional counterpart by learning the relationship between the hyper-parameters and the derivative-based global sensitivity indices. The performance of SGE-Kriging is finally validated by means of numerical experiments with several benchmarks and a high-dimensional aerodynamic modeling problem. The results show that the SGE-Kriging model features an accuracy and robustness that is comparable to the standard one but comes at much less training costs. The benefits are most evident for high-dimensional problems with tens of variables.
Guía de Funcionamiento Sala Situacional de Salud, Ministerio de Salud Pública del Ecuador.
Creators: name: Rivadeneira, Darío André
name: Yépez, Catalina
Publisher: name: Zenodo
Year: 2017
Subjects: Salud Pública
Gestión de Riesgos
Administración de Desastres
Administración de Emergencias
Determinantes Sociales
Centro de Operaciones de Emergencia
Sala Situacional de Salud
Inteligencia Médica

description: La salud está determinada por las condiciones de vida de las personas, familias y comunidades; y que estas condiciones de vida están vinculadas, a su vez, con el grado de desarrollo y de participación de los actores de la sociedad civil, en el ámbito local.

El Análisis de Situación de Salud -ASIS- para que sea integral requiere tomar en cuenta a todos los determinantes sociales posibles: antecedentes socio-históricos de la población afectada, y los macro determinantes políticos, sociales, económicos, culturales, étnicos; pues solo así influirá en las causas estructurales de la situación de salud y producirá conocimientos necesarios y suficientes para lograr propuestas que vinculen a los actores de la sociedad civil en la transformación de dicha situación. Involucrando a estos actores con políticas trasversales y multisectoriales de intervención producidas en territorio y aplicadas según las diversas realidades, y su determinación sociocultural, con respeto a sus prácticas ancestrales en salud, y para el manejo de dichos eventos adversos.

Una sala situacional es una locación física para la coordinación de información y recursos, con la finalidad de apoyar la gestión institucional, la negociación política, la identificación de necesidades, la movilización de recursos, el monitoreo y evaluación de las intervenciones en salud, asesoría en situaciones de normalidad y/o situaciones de desastres. Durante el manejo de incidentes, mencionada sala también es conocida como “Centro de Operaciones de Emergencia de Salud Pública” (COESP).

Desde el COESP se integra los servicios de salud pública tradicionales en un modelo de gestión de riesgos. El mismo soporta y es un componente de las existentes autoridades y entidades nacionales de gestión de riesgos.

El COESP, como un centro de operaciones de emergencia orientado a la salud pública, debe ser parte de un programa comprensivo de salud pública basado en gestión de riesgos, planeación y construcción de capacidades.
Hollow Bessel beams for guiding atoms between vacuum chambers: A proposal and efficiency study
Creators: name: Rivero, Dalila
name: de Angelis, Vinicius S.
name: Beli, Camila
name: Moreno, Michelle
name: Ambrosio, Leonardo
name: Courteille, Philippe W.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We explore a scheme for guiding cold atoms through a hollow Bessel beam generated by a single axicon and a lens from a 2D magneto-optical trap toward a science chamber. We compare the Bessel beam profiles measured along the optical axis to a numerical propagation of the beam's wavefront, and we show how it is affected by diffraction during the passage through a long narrow funnel serving as a differential pumping tube between the chambers. We derive an approximate analytic expression for the intensity distribution of the Bessel beam and the dipolar optical force acting on the atoms. By a Monte-Carlo simulation based on a stochastic Runge-Kutta algorithm of the motion of atoms initially prepared at a given temperature we show that a considerable enhancement of the transfer efficiency can be expected in the presence of a sufficiently intense Bessel beam.
Letter from R. M. Winslow to Mr. [James] Goldie, October 29, 1914
Creators: name: Winslow, R. M.
Publisher: name: The University of British Columbia
Year: 2017

description: Letter to Mr. [James] Goldie from R. M. Winslow, dated October 29, 1914, regarding a statement of the analysis of soils from Rainbow Ranch.
A Central Limit Theorem for Integer Partitions into Small Powers
Creators: name: Lipnik, Gabriel F.
name: Madritsch, Manfred G.
name: Tichy, Robert F.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Number Theory (math.NT)
subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 11P82, 05A17, 60F05

description: The study of the well-known partition function $p(n)$ counting the number of solutions to $n = a_{1} + \dots + a_{\ell}$ with integers $1 \leq a_{1} \leq \dots \leq a_{\ell}$ has a long history in combinatorics. In this paper, we study a variant, namely partitions of integers into \begin{equation*}
 n=\lfloor a_1^α\rfloor + \cdots + \lfloor a_\ell^α\rfloor \end{equation*} with $1\leq a_1 < \cdots < a_\ell$ and some fixed $0 < α< 1$. In particular, we prove a central limit theorem for the number of summands in such partitions, using the saddle point method.
description: 17 pages
Accretion in the Rho-Oph pre-main sequence stars
Creators: name: Natta, A.
name: Testi, L.
name: Randich, S.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The aim of this paper is to provide a measurement of the mass accretion rate in a large, complete sample of objects in the core of the star forming region Rho-Oph. The sample includes most of the objects (104 out of 111) with evidence of a circumstellar disk from mid-infrared photometry; it covers a stellar mass range from about 0.03 to 3 Msun and it is complete to a limiting mass of ~0.05 Msun. We used J and K-band spectra to derive the mass accretion rate of each object from the intensity of the hydrogen recombination lines, Pab or Brg. For comparison, we also obtained similar spectra of 35 diskless objects. The results show that emission in these lines is only seen in stars with disks, and can be used as an indicator of accretion. However, the converse does not hold, as about 50% of our disk objects do not have detectable line emission. The measured accretion rates show a strong correlation with the mass of the central object (Macc ~ Mstar^1.8+-0.2) and a large spread, of two orders of magnitude at least, for any interval of Mstar. A comparison with existing data for Taurus shows that the objects in the two regions have similar behaviour, at least for objects more massive than ~0.1Msun. The implications of these results are briefly discussed.
description: A&A in press, 16 pages including tables, 5 figures
Stylonychia mytilus Ehrenberg 1830
Creators: name: Durán-Ramírez, Carlos Alberto
name: Dias, Roberto Júnio Pedroso
name: Estrada, Rosaura Mayén-
Publisher: name: Zenodo
Year: 2020
Subjects: Biodiversity
Taxonomy
Chromista
Ciliophora
Hypotrichea
Oxytrichida
Oxytrichidae
Stylonychia
Stylonychia mytilus

description: Stylonychia mytilus (Müller, 1773) Ehrenberg, 1830
Distribution. BRAZIL: Paraná River between the Nupelia’s Field Station and the district of Porto São José, São Pedro do Paraná (Buosi et al. 2014 b, 2015), (Ad).
description: Published as part of Durán-Ramírez, Carlos Alberto, Dias, Roberto Júnio Pedroso & Estrada, Rosaura Mayén-, 2020, Checklist of ciliates (Alveolata: Ciliophora) that inhabit in bromeliads from the Neotropical Region, pp. 1-36 in Zootaxa 4895 (1) on page 11, DOI: 10.11646/zootaxa.4895.1.1, http://zenodo.org/record/4321437
Tight upper bound on the quantum value of Svetlichny operators under local filtering and hidden genuine nonlocality
Creators: name: Sun, Lingyun
name: Xu, Li
name: Wang, Jing
name: Li, Ming
name: Shen, Shuqian
name: Li, Lei
name: Fei, Shaoming
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Nonlocal quantum correlations among the quantum subsystems play essential roles in quantum science. The violation of the Svetlichny inequality provides sufficient conditions of genuine tripartite nonlocality. We provide tight upper bounds on the maximal quantum value of the Svetlichny operators under local filtering operations, and present a qualitative analytical analysis on the hidden genuine nonlocality for three-qubit systems. We investigate in detail two classes of three-qubit states whose hidden genuine nonlocalities can be revealed by local filtering.
description: 2 figures
0-level Vacuum Packaging RT Process for MEMS Resonators
Creators: name: Abelé, N.
name: Grogg, D.
name: Hibert, C.
name: Casset, F.
name: Ancey, P.
name: Ionescu, A.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Other Computer Science (cs.OH)
subject: FOS: Computer and information sciences

description: A new Room Temperature (RT) 0-level vacuum package is demonstrated in this work, using amorphous silicon (aSi) as sacrificial layer and SiO2 as structural layer. The process is compatible with most of MEMS resonators and Resonant Suspended-Gate MOSFET [1] fabrication processes. This paper presents a study on the influence of releasing hole dimensions on the releasing time and hole clogging. It discusses mass production compatibility in terms of packaging stress during back-end plastic injection process. The packaging is done at room temperature making it fully compatible with IC-processed wafers and avoiding any subsequent degradation of the active devices.
description: Submitted on behalf of EDA Publishing Association (http://irevues.inist.fr/EDA-Publishing)
The LOFAR Two-metre Sky Survey Deep Fields -- Data Release 1: IV. Photometric redshifts and stellar masses
Creators: name: Duncan, K. J.
name: Kondapally, R.
name: Brown, M. J. I.
name: Bonato, M.
name: Best, P. N.
name: Röttgering, H. J. A.
name: Bondi, M.
name: Bowler, R. A. A.
name: Cochrane, R. K.
name: Gürkan, G.
name: Hardcastle, M. J.
name: Jarvis, M. J.
name: Kunert-Bajraszewska, M.
name: Leslie, S. K.
name: Małek, K.
name: Morabito, L. K.
name: O'Sullivan, S. P.
name: Prandoni, I.
name: Sabater, J.
name: Shimwell, T. W.
name: Smith, D. J. B.
name: Wang, L.
name: Wołowska, A.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: The Low Frequency Array (LOFAR) Two-metre Sky Survey (LoTSS) is a sensitive, high-resolution 120-168 MHz survey split across multiple tiers over the northern sky. The first LoTSS Deep Fields data release consists of deep radio continuum imaging at 150 MHz of the Boötes, European Large Area Infrared Space Observatory Survey-North 1 (ELAIS-N1), and Lockman Hole fields, down to rms sensitivities of $\sim$32, 20, and 22 $μ$Jy beam$^{-1}$, respectively. In this paper we present consistent photometric redshift (photo-$z$) estimates for the optical source catalogues in all three fields - totalling over 7 million sources ($\sim5$ million after limiting to regions with the best photometric coverage). Our photo-$z$ estimation uses a hybrid methodology that combines template fitting and machine learning and is optimised to produce the best possible performance for the radio continuum selected sources and the wider optical source population. Comparing our results with spectroscopic redshift samples, we find a robust scatter ranging from 1.6 to 2% for galaxies and 6.4 to 7% for identified optical, infrared, or X-ray selected active galactic nuclei (AGN). Our estimated outlier fractions ($\left | z_{\text{phot}} - z_{\text{spec}} \right | / (1+z_{\text{spec}}) > 0.15$) for the corresponding subsets range from 1.5 to 1.8% and 18 to 22%, respectively. Replicating trends seen in analyses of previous wide-area radio surveys, we find no strong trend in photo-$z$ quality as a function of radio luminosity for a fixed redshift. We exploit the broad wavelength coverage available within each field to produce galaxy stellar mass estimates for all optical sources at $z < 1.5$. Stellar mass functions derived for each field are used to validate our mass estimates, with the resulting estimates in good agreement between each field and with published results from the literature.
description: 23 pages, 14 figures. Accepted for publication in A&A. This paper is part of the 1st data release of the LoTSS Deep Fields - Electronic data catalogues will be made available on journal publication
Half-delocalization of eigenfunctions for the Laplacian on an Anosov manifold
Creators: name: Anantharaman, Nalini
name: Nonnenmacher, Stéphane
Publisher: name: arXiv
Year: 2006
Subjects: subject: Mathematical Physics (math-ph)
subject: Dynamical Systems (math.DS)
subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences
subject: FOS: Mathematics
subject: 81Q50, 37D20, 35P20, 28D20

description: We study the high-energy eigenfunctions of the Laplacian on a compact Riemannian manifold with Anosov geodesic flow. The localization of a semiclassical measure associated with a sequence of eigenfunctions is characterized by the Kolmogorov-Sinai entropy of this measure. We show that this entropy is necessarily bounded from below by a constant which, in the case of constant negative curvature, equals half the maximal entropy. In this sense, high-energy eigenfunctions are at least half-delocalized.
description: We added the proof of the Entropic Uncertainty Principle. 45 pages, 2 EPS figures
ULF: Unsupervised Labeling Function Correction using Cross-Validation for Weak Supervision
Creators: name: Sedova, Anastasiia
name: Roth, Benjamin
Publisher: name: arXiv
Year: 2022
Subjects: subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: A cost-effective alternative to manual data labeling is weak supervision (WS), where data samples are automatically annotated using a predefined set of labeling functions (LFs), rule-based mechanisms that generate artificial labels for the associated classes. In this work, we investigate noise reduction techniques for WS based on the principle of k-fold cross-validation. We introduce a new algorithm ULF for Unsupervised Labeling Function correction, which denoises WS data by leveraging models trained on all but some LFs to identify and correct biases specific to the held-out LFs. Specifically, ULF refines the allocation of LFs to classes by re-estimating this assignment on highly reliable cross-validated samples. Evaluation on multiple datasets confirms ULF's effectiveness in enhancing WS learning without the need for manual labeling.
description: EMNLP'23
Quasiparticle dynamics of symmetry resolved entanglement after a quench: the examples of conformal field theories and free fermions
Creators: name: Parez, Gilles
name: Bonsignori, Riccarda
name: Calabrese, Pasquale
Publisher: name: arXiv
Year: 2020
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: High Energy Physics - Theory (hep-th)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The time evolution of the entanglement entropy is a key concept to understand the structure of a non-equilibrium quantum state. In a large class of models, such evolution can be understood in terms of a semiclassical picture of moving quasiparticles spreading the entanglement throughout the system. However, it is not yet known how the entanglement splits between the sectors of an internal local symmetry of a quantum many-body system. Here, guided by the examples of conformal field theories and free-fermion chains, we show that the quasiparticle picture can be adapted to this goal, leading to a general conjecture for the charged entropies whose Fourier transform gives the desired symmetry resolved entanglement $S_n(q)$. We point out two physically relevant effects that should be easily observed in atomic experiments: a delay time for the onset of $S_n(q)$ which grows linearly with $|Δq|$ (the difference from the charge $q$ and its mean value), and an effective equipartition when $|Δq|$ is much smaller than the subsystem size.
description: 7 pages, 2 figures
Simulating magnetosphere-ionosphere coupling in the TIEGCM
Creators: name: Edwin, Stanley
name: Maute, Astrid
name: Richmond, Arthur
Publisher: name: University Corporation For Atmospheric Research (UCAR)
Year: 2011

At high latitude there is a strong coupling between the magnetosphere and ionosphere. Modeling the full coupling can require extensive computing resources, since a magnetosphere model has to be coupled to an ionosphere model. Therefore, most general-circulation models (GCMs) approximate this high-latitude coupling by using empirical models [Weimer 2005, Heelis et al. 1982] that specify the high-latitude convection pattern for different geospace conditions. This research aims not only to show the viability of the NCAR Thermosphere-Ionosphere Electrodynamics GCM (NCAR-TIEGCM) [Richmond et al., 1992] in its ability to model the magnetosphere-ionosphere coupling using a prescribed electric potential from the empirical model [Heelis et al. 1982], but also to show that it can accurately represent the coupling using field-aligned current (FAC) consistent with the prescribed electric potential. Using FAC to drive the high latitudes has the advantage that the neutral wind effects can be considered everywhere instead of using a prescribed empirical electric-potential pattern. In addition, with new data from the AMPERE project (ampere.jhuapl.edu), the TIEGCM has the option to be driven by a more realistic spatial and temporal distribution of the energy input. This study compared the effects of forcing the model with a prescribed electric potential to forcing the model with a consistent FAC. The results indicate that convection is stronger when the model is forced by FAC because of the neutral wind effect. We further examine the difference in total energy input and its effects on the thermosphere temperature. The electric potential is affected by the FAC. Since the electric potential is changing the neutral winds are affected. In addition the Joule heating is also affected by the ion density and conductivity, and the temperature by all. Further studies would be using satellite data for the TIEGCM FAC input.
A First Runtime Analysis of the NSGA-II on a Multimodal Problem
Creators: name: Doerr, Benjamin
name: Qu, Zhongdi
Publisher: name: arXiv
Year: 2022
Subjects: subject: Neural and Evolutionary Computing (cs.NE)
subject: Artificial Intelligence (cs.AI)
subject: Data Structures and Algorithms (cs.DS)
subject: Optimization and Control (math.OC)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics

description: Very recently, the first mathematical runtime analyses of the multi-objective evolutionary optimizer NSGA-II have been conducted. We continue this line of research with a first runtime analysis of this algorithm on a benchmark problem consisting of two multimodal objectives. We prove that if the population size $N$ is at least four times the size of the Pareto front, then the NSGA-II with four different ways to select parents and bit-wise mutation optimizes the OneJumpZeroJump benchmark with jump size~$2 \le k \le n/4$ in time $O(N n^k)$. When using fast mutation, a recently proposed heavy-tailed mutation operator, this guarantee improves by a factor of $k^{Ω(k)}$. Overall, this work shows that the NSGA-II copes with the local optima of the OneJumpZeroJump problem at least as well as the global SEMO algorithm.
description: Appeared in the Transactions on Evolutionary Computation. Extends a paper that appeared in the Proceedings of PPSN 2022
From MEMS Devices to Smart Integrated Systems
Creators: name: Soeraasen, O.
name: Ramstad, J. E.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Other Computer Science (cs.OH)
subject: FOS: Computer and information sciences

description: The smart integrated systems of tomorrow would demand a combination of micromechanical components and traditional electronics. On-chip solutions will be the ultimate goal. One way of making such systems is to implement the mechanical parts in an ordinary CMOS process. This procedure has been used to design an oscillator consisting of a resonating cantilever beam and a CMOS Pierce feedback amplifier. The resonating frequency is changed if the beam is bent by external forces. The paper describes central features of this procedure and highlights the design considerations for the CMOS-MEMS oscillator. The circuit is used as an example of a "VLSI designer" way of making future integrated micromechanical and microelectronic systems on-chip. The possibility for expansion to larger systems is reviewed.
description: Submitted on behalf of EDA Publishing Association (http://irevues.inist.fr/EDA-Publishing)
Rotating Love: The dynamical tides of spinning Newtonian stars
Creators: name: Pnigouras, Pantelis
name: Gittins, Fabian
name: Nanda, Amlan
name: Andersson, Nils
name: Jones, David Ian
Publisher: name: arXiv
Year: 2022
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We carefully develop the framework required to model the dynamical tidal response of a spinning neutron star in an inspiralling binary system, in the context of Newtonian gravity, making sure to include all relevant details and connections to the existing literature. The tidal perturbation is decomposed in terms of the normal oscillation modes, used to derive an expression for the effective Love number which is valid for any rotation rate. In contrast to previous work on the problem, our analysis highlights subtle issues relating to the orthogonality condition required for the mode-sum representation of the dynamical tide and shows how the prograde and retrograde modes combine to provide the overall tidal response. Utilising a slow-rotation expansion, we show that the dynamical tide (the effective Love number) is corrected at first order in rotation, whereas in the case of the static tide (the static Love number) the rotational corrections do not enter until second order.
description: 19 pages, 1 figure
Improvement of hurricane risk perceptions: Re-analysis of a hurricane damage index and development of spatial damage assessments
Creators: name: Maina, Sandra
name: Done, James
name: Bruyere, Cindy
name: Phillips, Cody
Publisher: name: University Corporation For Atmospheric Research (UCAR)
Year: 2011

Implementation of potential damage assessment tools in hurricane-prone areas is an essential aspect of communicating accurate hurricane risk information. Several indices currently exist (e.g., Saffir-Simpson Hurricane Wind Scale) that effectively communicate storm strength; however, they are unable to quantify potential damage. The recently developed Maina Hurricane Index (MHI) addressed this deficiency and used a hurricane's central minimum pressure and radius of hurricane-force winds to create damage forecasts. The MHI was developed by analyzing data from 13 historical storms--a small sample size limited by the availability of storm size data. This work revisited the MHI using a larger data set, and results showed that central pressure is the best indicator of potential damage. By creating a single damage value per storm, the MHI aids in the decision-making of government and private agencies such as emergency managers, yet it does not convey storm impacts on individuals within a community. In response, this study also developed a methodology to generate spatial damage assessments that illustrate the relative damage distribution across a storm's path. A swath of maximum winds was first generated using a parametric wind field model, then translated to damage using a function based on wind speed and a measure of the directional change in wind. Through the ability to forecast both net damage of land falling storms and the distribution of damage across the storm's path, individual perceptions of hurricane risk can be unified to make way for safer preparation and evacuation decisions.
The evolution of a newborn millisecond magnetar with a propeller-recycling disk
Creators: name: Li, Shao-Ze
name: Yu, Yun-Wei
name: Gao, He
name: Zhang, Bing
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: A rapidly rotating and highly magnetized neutron star (NS) could be formed from the explosive phenomena such as superluminous supernovae and gamma-ray bursts. This newborn NS can substantially influence the emission of these explosive transients through its spin-down. The spin-down evolution of the NS can sometimes be affected by fallback accretion, although it is usually regulated by the magnetic dipole radiation and gravitational wave radiation of the NS. Under appropriate conditions, the accreting material can be firstly ejected and subsequently recycled back, so that the accretion disk can keep in a quasi-steady state for a long time. Here we describe the interaction of the NS with such a propeller-recycling disk and their co-evolution. Our result shows that, the spin-down of the NS can be initially dominated by the propeller, which prevents the disk material from falling onto the NS until hundreds or thousands of seconds later. It is suggested that the abrupt fall of the disk material onto the NS could significantly suppress the magnetic dipole radiation and then convert the NS from a normal magnetar to a low-field magnetar. This evolution behavior of the newborn NS can help to understand the very different influence of the NS on the early GRB afterglows and the late supernova/kilonova emission.
description: 6 pages, 2 figures, Accepted for publication in ApJ
Acute Lymphoblastic Leukemia Detection Using Hypercomplex-Valued Convolutional Neural Networks
Creators: name: Vieira, Guilherme
name: Valle, Marcos Eduardo
Publisher: name: arXiv
Year: 2022
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Machine Learning (cs.LG)
subject: Neural and Evolutionary Computing (cs.NE)
subject: Image and Video Processing (eess.IV)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: This paper features convolutional neural networks defined on hypercomplex algebras applied to classify lymphocytes in blood smear digital microscopic images. Such classification is helpful for the diagnosis of acute lymphoblast leukemia (ALL), a type of blood cancer. We perform the classification task using eight hypercomplex-valued convolutional neural networks (HvCNNs) along with real-valued convolutional networks. Our results show that HvCNNs perform better than the real-valued model, showcasing higher accuracy with a much smaller number of parameters. Moreover, we found that HvCNNs based on Clifford algebras processing HSV-encoded images attained the highest observed accuracies. Precisely, our HvCNN yielded an average accuracy rate of 96.6% using the ALL-IDB2 dataset with a 50% train-test split, a value extremely close to the state-of-the-art models but using a much simpler architecture with significantly fewer parameters.
description: Accepted for presentation at 2022 International Joint Conference on Neural Networks (IJCNN 2022), 18-23 July, 2022, Padua, Italy
A control system framework for simulating forest landscape management
Creators: name: Hafer, Mark A.
Publisher: name: University of British Columbia
Year: 2009

description: Traditional forest planning models, based on mathematical programming techniques for constrained optimization, have failed to adequately address the new realities of managing forest landscapes so as to sustain in perpetuity a full range of intrinsic values and human benefits. This thesis proposes a general simulation modelling framework for the analysis and management of forest landscapes. The framework, based on state space techniques for modelling of complex dynamic systems, addresses many of the requirements of modern forest planning analysis. Application of the general framework is demonstrated in the development of a specific simulation model for designing spatially explicit harvest schedules that balance biodiversity and timber production objectives. A state space model is developed to predict the dynamics stand level structure over a landscape represented in raster format. This portion of the model is shown to provide realistic predictions of the temporal development of stand structure, and demonstrates the potential of the state space format for representing the physical attributes and complex dynamics of forest landscapes. An heuristic control procedure based on simple multi-criteria decision making techniques is developed to determine the spatial and temporal sequence of management actions according to their combined effect on the objectives for the landscape. To demonstrate and evaluate the feasibility of the proposed approach, the completed model is used to simulate the management of a 3850 hectare landscape over 150 years using a 5 year time step. Scenarios are presented to show achieved levels of serai stage, patch size, and timber outputs under different weightings of the corresponding management objectives. The model was able to maintain the system output within the desired limits when harvest volume was the only specified management objective. The desired harvest levels were achieved primarily through clearcut and heavy thinning activities. In the case of managing for serai stage, patch size, and timber objectives the model was an effective tool for exploring the trade-offs required to find a balance between all seven objectives. Serai stage objectives were fully met, although at the expense of violating the upper bound on harvest levels in several simulation periods. Patch size objectives were met in some periods, and were significantly improved in all other periods compared to the scenario involving only the volume objective. This broad mix of landscape outputs was achieved using a much wider range of harvest treatment intensities than in the single objective case. The case study demonstrates that it is feasible to represent a detailed description of stand level dynamics in a spatially explicit forest level model using readily available desktop computing systems. Such a simulation model is intended to have application as a tool for designing alternative management strategies to provide input to an iterative multi-objective planning process.