cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Lindsaea divaricata Klotzsch, Linnaea
Creators: name: Smith, Alan R.
name: Kessler, Michael
Publisher: name: Zenodo
Year: 2017
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Polypodiopsida
Polypodiales
Lindsaeaceae
Lindsaea
Lindsaea divaricata

description: Lindsaea divaricata Klotzsch, Linnaea 18: 547. 1844.
 Range:— Lesser Antilles; Guatemala to Bolivia (BE, CO, LP, PA, SC), Paraguay, and southern Brazil.
 Ecology:— Fairly common; terrestrial in humid forests, on nutrient-poor soils (Lehtonen & Tuomisto 2007); to 950 m.
 Notes:— Differs from Lindsaea portoricensis by more continuous rachis wings, narrower indusia, and more spreading pinnae. Petioles castaneous to nearly black, abaxially rounded; blades 2-pinnate; primary rachises adaxially and secondary rachises on both sides with continuous, pale, lateral wings; pinnules obtuse, ca. 2½ times as long as broad, apically crenate; distal segments usually large, triangular, free or almost free; indusia entire to subentire, 0.1– 0.15 mm wide.
description: Published as part of Smith, Alan R. & Kessler, Michael, 2017, Prodromus of a fern flora for Bolivia. XXV. Lindsaeaceae, pp. 290-294 in Phytotaxa 332 (3) on page 292, DOI: 10.11646/phytotaxa.332.3.6, http://zenodo.org/record/13723507
Large-scale anomalies in the cosmic microwave background as signatures of non-Gaussianity
Creators: name: Erickcek, Adrienne L.
name: Shandera, Sarah
name: Adhikari, Saroj
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2016

description: We derive a general expression for the probability of observing deviations from statistical isotropy in the cosmic microwave background (CMB) if the primordial fluctuations are non-Gaussian and extend to superhorizon scales. The primary motivation is to properly characterize the monopole and dipole modulations of the primordial power spectrum that are generated by the coupling between superhorizon and subhorizon perturbations. Unlike previous proposals for generating the hemispherical power asymmetry, we do not assume that the power asymmetry results from a single large superhorizon mode. Instead, we extrapolate the observed power spectrum to superhorizon scales and compute the power asymmetry that would result from a specific realization of non-Gaussian perturbations on scales larger than the observable universe. Our study encompasses many of the scenarios that have been put forward as possible explanations for the CMB hemispherical power asymmetry. We confirm our analytic predictions for the probability of a given power asymmetry by comparing them to numerical realizations of CMB maps. We find that non-local models of non-Gaussianity and scale-dependent local non-Gaussianity produce scale-dependent modulations of the power spectrum, thereby potentially producing both a monopolar and a dipolar power modulation on large scales. We then provide simple examples of finding the posterior distributions for the parameters of the bispectrum from the observed monopole and dipole modulations.
Clocking the Onset of Bilayer Coherence in a High-$\mathrm{T_C}$ Cuprate
Creators: name: Baldini, Edoardo
name: Mann, Andreas
name: Mallett, Benjamin P. P.
name: Arrell, Christopher
name: van Mourik, Frank
name: Wolf, Thomas
name: Mihailovic, Dragan
name: Tallon, Jeffrey L.
name: Bernhard, Christian
name: Lorenzana, José
name: Carbone, Fabrizio
Publisher: name: arXiv
Year: 2015
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: In cuprates, a precursor state of superconductivity is speculated to exist above the critical temperature $\mathrm{T_C}$. Here we show via a combination of far-infrared ellipsometry and ultrafast broadband optical spectroscopy that signatures of such a state can be obtained via three independent observables in an underdoped sample of NdBa$_2$Cu$_3$O$_{6+δ}$. The pseudogap correlations were disentangled from the response of laser-broken pairs by clocking their characteristic time-scales. The onset of a superconducting precursor state was found at a temperature $\mathrm{T_{ONS}}$ $>$ $\mathrm{T_C}$, consistent with the temperature scale identified via static optical spectroscopy. Furthermore, the temperature evolution of the coherent vibration of the Ba ion, strongly renormalized by the onset of superconductivity, revealed a pronounced anomaly at the same temperature $\mathrm{T_{ONS}}$. The microscopic nature of such a precursor state is discussed in terms of pre-formed pairs and enhanced bilayer coherence.
Leucadendron sample analysis in Kogelberg, site 3418BD/3/8
Creators: name: Jonkershoek Forestry Research Center
Publisher: name: South African Environmental Observation Network
Year: 2022
Subjects: Jonkershoek Forestry Research Centre
Leucadendron
sample analysis
Kogelberg

description: This is a scanned copy of a Leucadendron sample analysis in Kogelberg, site 3418BD/3/8. The Jonkershoek Forestry Research Center (part of the former South African Forestry Research Institute) was established in 1935 at Jonkershoek, near Stellenbosch, under the directorship of Dr C. L. Wicht. The initial aim was to determine how forestry activities in state plantations would affect climate, water conservation and erosion, and was later expanded to include studies of fynbos ecology, fire and alien species. Studies from the 1930s to the early 1990s saw the accumulation of a large amount of data dealing with fire experiments, detailed vegetation plot surveys, rare plant surveys and ecological studies, hydrological studies and the development of management plans for catchments around the Western Cape. SAEON now houses the archive of data collected by the Jonkershoek Forestry Research Center, which was originally held by the Council for Scientific and Industrial Research (CSIR).
Mirror reflections of a black hole
Creators: name: Evans, Charles R.
name: Anderson, Paul R.
name: Good, Michael R. R.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2016

description: An exact correspondence between a black hole and an accelerating mirror is demonstrated. It is shown that for a massless minimally coupled scalar field the same Bogolubov coefficients connecting the "in" and "out" states occur for a (1+1)D flat spacetime with a particular perfectly reflecting accelerating boundary trajectory and a (1+1)D curved spacetime in which a null shell collapses to form a black hole. Generalization of the latter to the (3+1)D case is discussed. The spectral dynamics is computed in both (1+1)-dimensional spacetimes along with the energy flux in the spacetime with a mirror. It is shown that the approach to equilibrium is monotonic, asymmetric in terms of the rate, and there is a specific time which characterizes the system when it is the most out-of-equilibrium.
Hunting down horizon-scale effects with multi-wavelength surveys
Creators: name: Fonseca, José
name: Camera, Stefano
name: Santos, Mário G.
name: Maartens, Roy
Publisher: name: arXiv
Year: 2015
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Next-generation cosmological surveys will probe ever larger volumes of the Universe, including the largest scales, near and beyond the horizon. On these scales, the galaxy power spectrum carries signatures of local primordial non-Gaussianity (PNG) and horizon-scale general relativistic (GR) effects. However, cosmic variance limits the detection of horizon-scale effects. Combining different surveys via the multi-tracer method allows us to reduce the effect down cosmic variance. This method benefits from large bias differences between two tracers of the underlying dark matter distribution, which suggests a multi-wavelength combination of large volume surveys that are planned on a similar timescale. We show that the combination of two contemporaneous surveys, a large neutral hydrogen intensity mapping survey in SKA Phase1 and a Euclid-like photometric survey, will provide unprecedented constraints on PNG as well as detection of the GR effects. We forecast that the error on local PNG will break through the cosmic variance limit on cosmic microwave background surveys and achieve $σ(f_{NL})\simeq1.4-0.5$, depending on assumed priors, bias, and sky coverage. GR effects are more robust to changes in the assumed fiducial model, and we forecast that they can be detected with a signal-to-noise of about $14$.
description: Typos corrected; Accepted for publication by the Astrophysical Journal Letters; 5 pages, 3 figures, 2 tables
Quantum control landscape for a $Λ$-atom in the vicinity of second order traps
Creators: name: Pechen, Alexander
name: Tannor, David J.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We show that the second order traps in the control landscape for a three-level $Λ$-system found in our previous work {\it Phys. Rev. Lett.} {\bf 106}, 120402 (2011) are not local maxima: there exist directions in the space of controls in which the objective grows. The growth of the objective is slow --- at best 4th order for weak variations of the control. This implies that simple gradient methods would be problematic in the vicinity of second order traps, where more sophisticated algorithms that exploit the higher order derivative information are necessary to climb up the control landscape efficiently. The theory is supported by a numerical investigation of the landscape in the vicinity of the $\varepsilon(t)=0$ second order trap, performed using the GRAPE and BFGS algorithms.
Lindsaea guianensis Dryand., Trans. Linn. Soc. London
Creators: name: Smith, Alan R.
name: Kessler, Michael
Publisher: name: Zenodo
Year: 2017
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Polypodiopsida
Polypodiales
Lindsaeaceae
Lindsaea
Lindsaea guianensis

description: Lindsaea guianensis (Aubl.) Dryand., Trans. Linn. Soc. London 3: 42. 1797.
 Range:— Lesser Antilles; Nicaragua; Colombia to Bolivia (PA) and northern Brazil.
 Ecology:— Rare; terrestrial, in humid forests, often near streams (Drucker et al. 2008); at 150 m in Bolivia, to 1250 m elsewhere.
 Notes:— The single Bolivian specimen can be assigned to subsp. guianensis. Lindsaea guianensis subsp. lanceastrum K.U.Kramer, from central and eastern Brazil, and Paraguay, may occur in eastern Bolivia. It has pinnae acute to shortly acuminate (vs. long-acuminate); distalmost pinnules ca. 5 mm long (vs. 1–2 mm); axes usually reddish to dark brown (vs. usually pale); and blades pinnate or bipinnate (vs. usually bipinnate). Perhaps best treated as a distinct species. Petioles stramineous to basally castaneous, abaxially rounded; blades (1–)2-pinnate; rachises rounded to angular (but without pale wings); pinnules 1½–2 times as long as broad; distal segments gradually reduced; indusia (entire to) minutely erose-denticulate, 0.15–0.2 mm wide.
description: Published as part of Smith, Alan R. & Kessler, Michael, 2017, Prodromus of a fern flora for Bolivia. XXV. Lindsaeaceae, pp. 290-294 in Phytotaxa 332 (3) on page 292, DOI: 10.11646/phytotaxa.332.3.6, http://zenodo.org/record/13723507
Pion structure function from leading neutron electroproduction and SU(2) flavor asymmetry
Creators: name: Sato, Nobuo
name: Ji, Chueng-Ryong
name: Melnitchouk,
name: McKenney,
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2016

description: In this paper, we examine the efficacy of pion exchange models to simultaneously describe leading neutron electroproduction at HERA and the $$\bar{d}-\bar{u}$$ flavor asymmetry in the proton. A detailed $$\chi^2$$ analysis of the ZEUS and H1 cross sections, when combined with constraints on the pion flux from Drell-Yan data, allows regions of applicability of one-pion exchange to be delineated. The analysis disfavors several models of the pion flux used in the literature, and yields an improved extraction of the pion structure function and its uncertainties at parton momentum fractions in the pion of $$4 \times 10^{-4} \lesssim x_\pi \lesssim 0.05$$ at a scale of $Q^2$=10 GeV$^2$. Also, we provide estimates for leading proton structure functions in upcoming tagged deep-inelastic scattering experiments on the deuteron with forward protons, based on the fit results, at Jefferson Lab.
Patient safety: using a visual cue to decrease patient falls
Creators: name: Lund, Nisha
Publisher: name: No Publisher Supplied
Year: 2022

description: Purpose: While many practices are in place to prevent falls, such as screening for falls upon admission, falls continue to pose a major problem in the inpatient setting. The consequences of a fall can lead to longer inpatient stays, unnecessary injuries, and death. Nearly 1 million falls occur in the inpatient setting resulting in costs of approximately $40 billion per year. Oncology patients have a unique set of risk factors placing them at a higher risk for falls, thus resulting in an unmet need. A review of the literature demonstrated that current measures for fall prevention display inconsistency with communication and engagement between providers and patients. Studies show that a visual cue can enhance a patient’s awareness of their personal risk and can help to decrease those risks. The purpose of this project was to evaluate the use of a simple visual cue and patient engagement to prevent falls on two oncology units and one bone marrow transplant unit. Methods: To enhance communication and engagement with patients, this quality improvement project evaluated the effectiveness of a bedside visual cue as an approach to preventing falls for oncology patients involving a total of 62 beds. Over a 12-week period, data regarding falls and compliance of the bedside sign were collected on a weekly basis on random days and recorded on a data collection tool. Results: Outcomes measured the assessment of falls and compliance with the usage of the bedside sign. During the pre-implementation phase, the total falls on all three units was 13. Post-implementation, there was a total of 10 falls on tall three units, thus resulting in a 23.07% decrease in falls which was not significant (p = 0.473). There was a significant decrease in the number of injuries from pre-implementation with 5 falls to post-implementation with 0 falls (p = .025). Overall compliance with the bedside sign was 99.57% throughout the implementation period. Implications for Practice: The use of a bedside sign with patient engagement is a feasible method to include within prevention programs for falls. The presence of a bedside sign was noted to increase a patient’s awareness of personal risks of falls as well as staff engagement. Though there was no significant decrease in the number of falls, there was a statistically significant decrease in injuries associated with falls. The results suggest this intervention should be expanded to other units for a larger sample size and for a longer duration to determine the overall impact on fall reduction, patient satisfaction, patient safety, and education.
title: Homosexualität im Spiegel der rechtsgeschichtlichen Entwicklung
title: Eine kritische Analyse
titleType: Subtitle
Creators: name: Gürbüz, Sabahat
Publisher: name: Humboldt-Universität zu Berlin
Year: 2016
Subjects: subject: Homosexualität
subject: Diskriminierung
subject: Lebenspartnerschaft
subject: Recht
subject: 300 Sozialwissenschaften
subject: 340 Recht
subject: Deutschland

description: Dieser Beitrag zeichnet die historische Entwicklung von Gesetzgebung und Rechtsprechung im Zusammenhang mit Homosexualität in Deutschland nach und zeigt auf, wie gesellschaftlicher Wandel auf diese Bereiche einwirkt. Er beschreibt die rechtliche Behandlung desselben Lebensbereichs in einem Terrorregime (NS), die parallel stattfindende Entwicklung in zwei verschiedenen politischen Systemen im geteilten Deutschland hin zur Zusammenführung und Neuregelung nach der Wiedervereinigung bis heute. Als Fazit lässt sich feststellen, dass eine Gleichstellung von Homosexuellen und Heterosexuellen auch heute noch nicht vollständig verwirklicht ist.
description: This article reviews the historical development of legislation and case law concerning homosexuality in Germany and shows the impact that changes in society have within this context. The article describes the legal treatment of this issue in a terror regime (NS), parallel developments in two different political systems in a separated Germany through to reunification and the ensuing new order right up to the present day. In conclusion, it is evident that even today full equality of homosexuals and heterosexuals has still not been achieved.
The non linear dynamics of retinal waves
Creators: name: Cessac, Bruno
name: Matzakou-Karvouniari, Dora
Publisher: name: arXiv
Year: 2023
Subjects: subject: Adaptation and Self-Organizing Systems (nlin.AO)
subject: Neurons and Cognition (q-bio.NC)
subject: FOS: Physical sciences
subject: FOS: Biological sciences

description: We investigate the dynamics of stage II retinal waves via a dynamical system, grounded on biophysics, and analysed with bifurcation theory. We show how the nonlinear cells coupling and bifurcation structure explain how waves start, propagate, interact and stop. Especially, we analyse how the existence of a small region in parameter space, where dynamics returns in a recurrent way, gives rise to a very rich dynamics. In this context, we propose a non linear transport equation characterizing the waves propagation and interaction.
description: 51 pages, 56 figures
Density count of Leucadendron pubescens, Leucadendron salignum, Paranomus bracteolaris and Protea nitida at site 3219AC/12
Creators: name: Jonkershoek Forestry Research Center
Publisher: name: South African Environmental Observation Network
Year: 2022
Subjects: Jonkershoek Forestry Research Centre
density counts
Leucadendron pubescens
Leucadendron salignum
Paranomus bracteolaris
Protea nitida

description: This is a scanned copy of a datasheet noting the density count of Leucadendron pubescens, Leucadendron salignum, Paranomus bracteolaris and Protea nitida at site 3219AC/12. The Jonkershoek Forestry Research Center (part of the former South African Forestry Research Institute) was established in 1935 at Jonkershoek, near Stellenbosch, under the directorship of Dr C. L. Wicht. The initial aim was to determine how forestry activities in state plantations would affect climate, water conservation and erosion, and was later expanded to include studies of fynbos ecology, fire and alien species.  Studies from the 1930s to the early 1990s saw the accumulation of a large amount of data dealing with fire experiments, detailed vegetation plot surveys, rare plant surveys and ecological studies, hydrological studies and the development of management plans for catchments around the Western Cape. SAEON now houses the archive of data collected by the Jonkershoek Forestry Research Center, which was originally held by the Council for Scientific and Industrial Research (CSIR).
Quartic chameleons: Safely scale-free in the early Universe
Creators: name: Miller, Carisa
name: Erickcek, Adrienne L.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2016

description: In chameleon gravity, there exists a light scalar field that couples to the trace of the stress-energy tensor in such a way that its mass depends on the ambient matter density, and the field is screened in local, high-density environments. Recently it was shown that, for the runaway potentials commonly considered in chameleon theories, the field's coupling to matter and the hierarchy of scales between Standard Model particles and the energy scale of such potentials result in catastrophic effects in the early Universe when these particles become nonrelativistic. Perturbations with trans-Planckian energies are excited, and the theory suffers a breakdown in calculability at the relatively low temperatures of Big Bang Nucleosynthesis. We consider a chameleon field in a quartic potential and show that the scale-free nature of this potential allows the chameleon to avoid many of the problems encountered by runaway potentials. Following inflation, the chameleon field oscillates around the minimum of its effective potential, and rapid changes in its effective mass excite perturbations via quantum particle production. The quartic model, however, only generates high-energy perturbations at comparably high temperatures and is able remain a well-behaved effective field theory at nucleosynthesis.
title: Separating Algorithmic Thinking and Programming
Creators: name: Chandoo, Maurice
Publisher: name: Hannover : Institutionelles Repositorium der Leibniz Universität Hannover
Year: 2020
Subjects: subject: machine-computer game
subject: trace-based programming
subject: model of computation
subject: notional machine
subject: programming education
subject: 000 | Allgemeines, Wissenschaft::000 | Informatik, Wissen, Systeme::004 | Informatik

description: We show how the first steps of algorithmic thinking and programming can be trained separately. The learner is not assumed to have any prior experience. A general framework and a sequence of training tasks is described and tested in practice with two 10th graders. Both were able to write relatively complex programs using only pen & paper within two days. To train algorithmic thinking, computational problems are presented as games to the learner. Roughly speaking, a winning strategy corresponds to an algorithm which solves the problem. Thus, if the learner consistently wins the game for various instances then this indicates that they have found an algorithm. We describe a general mechanism to translate a computational problem into such a game. For the programming part, the learner is shown how a program can be constructed from traces. Programs are specified in a language which depends on the underlying model of computation (think of Turing machines, pushdown automata or instruction set architectures); such a model can be seen as a notional machine. The language itself is very simple yet broadly applicable due to the generality of our definition of model of computation.
Solution of a generalised Boltzmann's equation for non-equilibrium charged particle transport via localised and delocalised states
Creators: name: Stokes, Peter W.
name: Philippa, Bronson
name: Cocks, Daniel
name: White, Ronald D.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We present a general phase-space kinetic model for charged particle transport through combined localised and delocalised states, capable of describing scattering collisions, trapping, detrapping and losses. The model is described by a generalised Boltzmann equation, for which an analytical solution is found in Fourier-Laplace space. The velocity of the centre of mass (CM) and the diffusivity about it are determined analytically, together with the flux transport coefficients. Transient negative values of the free particle CM transport coefficients can be observed due to the trapping to, and detrapping from, localised states. A Chapman-Enskog type perturbative solution technique is applied, confirming the analytical results and highlighting the emergence of a density gradient representation in the weak-gradient hydrodynamic regime. A generalised diffusion equation with a unique global time operator is shown to arise, reducing to the standard diffusion equation and a Caputo fractional diffusion equation in the normal and dispersive limits. A subordination transformation is used to solve the generalised diffusion equation by mapping from the solution of a corresponding standard diffusion equation.
description: 28 pages, 5 figures
การสื่อสารองค์กรภายใต้สถานการณ์การแพร่ระบาดโควิด -19กรณีศึกษา ศูนย์การแพทย์กาญจนาภิเษก
Creators: name: เพ็ญสินี วิพัฒน์ครุฑ
Publisher: name: คณะนิเทศศาสตร์ มหาวิทยาลัยราชภัฏรำไพพรรณี
Year: 2566
Subjects: การสื่อสารองค์กร
โควิด19
ศูนย์การแพทย์กาญจนาภิเษก

description: วารสารนวัตกรรมสังคมและเทคโนโลยีสื่อสารมวลชน, 6, 1, 23-32
ปัจจัยที่มีอิทธิพลต่อการตัดสินใจสั่งผลิต ผลิตและสร้างแบรนด์อาหารเสริมสุขภาพผ่านสื่อดิจิทัลของ บริษัท เอสซีจีแกรนด์ จำกัด
Creators: name: ณฐาพัชร์ วรพงศ์พัชร์
Publisher: name: คณะนิเทศศาสตร์ มหาวิทยาลัยราชภัฏรำไพพรรณี
Year: 2566
Subjects: การตัดสินใจสั่งผลิต
ผลิต
อาหารเสริมสุขภาพ
สื่อดิจิทัล
สื่อสังคมออนไลน์

description: วารสารนวัตกรรมสังคมและเทคโนโลยีสื่อสารมวลชน, 6, 1, 33-43
2014 Commonwealth Fund Health Insurance Survey
Creators: name: Commonwealth Fund
Publisher: name: Roper Center for Public Opinion Research
Year: 2019

description: Quality of health care (1); health care access and primary care (5); communication and efficiency in delivery of care (2); care coordination (1); finding a doctor or specialist (5); cost-related access problems (6); personal current health insurance coverage and recent time uninsured (17); Affordable Care Act and health insurance marketplace (3); rating current health insurance coverage (1); health insurance purchased on one's own (9); health plan choices (2); going out of network to get care (2); problems with health insurance (4); medical debt (8); premium costs (9); deductible costs (3); prescription medicine coverage (2); (1); mental health coverage (1); maternity care coverage (1); birth control or contraception coverage (1); dental coverage (1); vision coverage (1); family insurance coverage (1); out of pocket costs (4); impact of medical bills (7); health status and chronic medical conditions (11); prescription medication usage (1); health screenings and immunizations (7); employment and health care (19).
Evolution of small-mass-ratio binaries with a spinning secondary
Creators: name: Osburn, Thomas
name: Warburton, Niels
name: Evans, Charles. R.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2017

description: We calculate the evolution and gravitational-wave emission of a spinning compact object inspiraling into a substantially more massive (non-rotating) black hole. We extend our previous model for a non-spinning binary [Phys. Rev. D 93, 064024] to include the Mathisson-Papapetrou-Dixon spin-curvature force. For spin-aligned binaries we calculate the dephasing of the inspiral and associated waveforms relative to models that do not include spin-curvature effects. We find this dephasing can be either positive or negative depending on the initial separation of the binary. For binaries in which the spin and orbital angular momentum are not parallel, the orbital plane precesses and we use a more general osculating element prescription to compute inspirals.
A comparative study of four significance measures for periodicity detection in astronomical surveys
Creators: name: Süveges, Maria
name: Guy, Leanne P.
name: Eyer, Laurent
name: Cuypers, Jan
name: Holl, Berry
name: Lecoeur-Taïbi, Isabelle
name: Mowlavi, Nami
name: Nienartowicz, Krzysztof
name: Blanco, Diego Ordóñez
name: Rimoldini, Lorenzo
name: Ruiz, Idoia
Publisher: name: arXiv
Year: 2015
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: We study the problem of periodicity detection in massive data sets of photometric or radial velocity time series, as presented by ESA's Gaia mission. Periodicity detection hinges on the estimation of the false alarm probability (FAP) of the extremum of the periodogram of the time series. We consider the problem of its estimation with two main issues in mind. First, for a given number of observations and signal-to-noise ratio, the rate of correct periodicity detections should be constant for all realized cadences of observations regardless of the observational time patterns, in order to avoid sky biases that are difficult to assess. Second, the computational loads should be kept feasible even for millions of time series. Using the Gaia case, we compare the $F^M$ method (Paltani 2004, Schwarzenberg-Czerny 2012), the Baluev method (Baluev 2008) and the GEV method (Süveges 2014), as well as a method for the direct estimation of a threshold. Three methods involve some unknown parameters, which are obtained by fitting a regression-type predictive model using easily obtainable covariates derived from observational time series. We conclude that the GEV and the Baluev methods both provide good solutions to the issues posed by a large-scale processing. The first of these yields the best scientific quality at the price of some moderately costly pre-processing. When this pre-processing is impossible for some reason (e.g. the computational costs are prohibitive or good regression models cannot be constructed), the Baluev method provides a computationally inexpensive alternative with slight biases in regions where time samplings exhibit strong aliases.
description: 16 pages, 14 figures, 1 table
Functional Dendritic Features of Serotonin Neurons in the Dorsal Raphe Nucleus
Creators: name: Boucher, Jean-François
Publisher: name: Université d'Ottawa / University of Ottawa
Year: 2023
Subjects: Neuroscience
Dorsal Raphe Nucleus
Serotonin
Electrophysiology
Dendrites
Multi-photon microscopy
Glutamate uncaging

description: The relatively few serotonin (5-HT) neurons located in the Dorsal Raphe Nucleus (DRN) give rise to an extensive axonal network modulating a wide-range of brain functions and behaviors. In turn, the DRN receives inputs from several brain regions and therefore exhibits the characteristics of a hub network. While recent technological advancements have provided an unprecedented look at the neurobiology of the DRN, important knowledge gaps remain in understanding how the constellation of synaptic inputs to this region confers 5-HT neurons their unique coding features. As a first step towards characterizing the DRN's input processing strategy, we set out to explore the landscape of dendritic operation operating in DRN 5-HT neurons. Using multi-photon microscopy and in vitro electrophysical recordings, we conducted a morphological and electrophysiological survey of 5-HT neurons where we identified two structurally and morphologically distinct types of glutamatergic synapses both expressing small NMDAR-mediated conductance. Our initial findings provide valuable insights on local rules that govern how synaptic inputs to the DRN are being processed to ultimately confer 5-HT neurons their unique coding features.
Rapid magnetic oscillations and magnetic breakdown in quasi-1D conductors
Creators: name: Montambaux, G.
name: Jérome, D.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We review the physics of magnetic quantum oscillations in quasi-one dimensional conductors with an open Fermi surface, in the presence of modulated order. We emphasize the difference between situations where a modulation couples states on the same side of the Fermi surface and a modulation couples states on opposite sides of the Fermi surface. We also consider cases where several modulations coexist, which may lead to a complex reorganization of the Fermi surface. The interplay between nesting effects and magnetic breakdown is discussed. The experimental situation is reviewed.
description: 10 pages, 8 figures, Contribution to the memorial issue in honor of J. Friedel, C. R. Acad. Sci. Paris
Soil profile of Langeberg, site 3319DA/2
Creators: name: Jonkershoek Forestry Research Center
Publisher: name: South African Environmental Observation Network
Year: 2022
Subjects: Jonkershoek Forestry Research Centre
Soil profile
Langeberg

description: This is a scanned copy of a soil profile of Langeberg, site 3319DA/2. The Jonkershoek Forestry Research Center (part of the former South African Forestry Research Institute) was established in 1935 at Jonkershoek, near Stellenbosch, under the directorship of Dr C. L. Wicht. The initial aim was to determine how forestry activities in state plantations would affect climate, water conservation and erosion, and was later expanded to include studies of fynbos ecology, fire and alien species. Studies from the 1930s to the early 1990s saw the accumulation of a large amount of data dealing with fire experiments, detailed vegetation plot surveys, rare plant surveys and ecological studies, hydrological studies and the development of management plans for catchments around the Western Cape. SAEON now houses the archive of data collected by the Jonkershoek Forestry Research Center, which was originally held by the Council for Scientific and Industrial Research (CSIR).
Siena College Research Institute Poll: September 4-7 2018 Siena New York Poll
Creators: name: PORL At The University Of North Florida
name: Siena College Research Institute
Publisher: name: Roper Center for Public Opinion Research
Year: 2019

description: Direction of New York State (1); likely to vote in General Election (1); favorable/unfavorable opinion of person or institution (6); Democratic primary vote (1); for Cuomo or against Nixon (1); for Nixon or against Cuomo (1); New York State Attorney General vote (1); Lieutenant Governor vote (1); best candidate to handle combating corruption (1); best candidate to handle fixing infrastructure (1); best candidate to handle advancing progressive policies (1); best candidate to handle creating fair tax structure (1); political leaning (1).
Widdringtonia Cederbergensis trials at Sneeuberg Hut Plot 2 in the Cederberg State Forest, site 3219AC
Creators: name: Jonkershoek Forestry Research Center
Publisher: name: South African Environmental Observation Network
Year: 2022
Subjects: Jonkershoek Forestry Research Centre
Widdringtonia cedarbergensis
Widdringtonia wallichii
Sneeuberg Hut
Cederberg State Forest
Cederberg

description: This is a scanned copy of a document, including a map and diagram, on Widdringtonia Cedarbergensis trials at the Sneeuberg Hut Plot 2 in the Cederberg State Forest, site 3219AC. The Jonkershoek Forestry Research Center (part of the former South African Forestry Research Institute) was established in 1935 at Jonkershoek, near Stellenbosch, under the directorship of Dr C. L. Wicht. The initial aim was to determine how forestry activities in state plantations would affect climate, water conservation and erosion, and was later expanded to include studies of fynbos ecology, fire and alien species.    Studies from the 1930s to the early 1990s saw the accumulation of a large amount of data dealing with fire experiments, detailed vegetation plot surveys, rare plant surveys and ecological studies, hydrological studies and the development of management plans for catchments around the Western Cape.   SAEON now houses the archive of data collected by the Jonkershoek Forestry Research Center, which was originally held by the Council for Scientific and Industrial Research (CSIR).
It has been a Weyl coming
Creators: name: Bernevig, B. Andrei
Publisher: name: arXiv
Year: 2015
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Condensed-matter physics brings us quasiparticles that behave like massless fermions.
description: Commentary for Nature Physics: http://www.nature.com/nphys/journal/vaop/ncurrent/full/nphys3454.html
The use of open-ended questions to verify the mathematical literacy. Suggestions from PISA 2012
Creators: name: Asquini, Giorgio
Publisher: name: Form@re - Open Journal per la formazione in rete
Year: 2016

description: The paper presents the results of the Italian students in OECD-PISA 2012. The results for the open-ended questions related to mathematical literacy are examined. The OECD database compendium for the cognitive item responses has been used, the items were grouped into the categories of PISA mathematical framework (content, context, process), and the classification by performance level has also been considered. The overall weakness of the Italian students in the open-ended questions is explained by the high rate of missing and very poor performance in some categories (“change and relationships”, “scientific context”, “formulate”). Italian students perform better in a few categories (“social context”, “interpreting and evaluating”, “space and shape”), but these new findings may represent a starting point for improvement. The possible use of data on open-ended questions in teacher training is also discussed. L’uso delle domande aperte per la verifica della competenza matematica. Suggestioni da PISA 2012 Il saggio presenta i risultati degli studenti italiani nell’indagine OECD-PISA 2012. Vengono considerati i risultati per le domande a risposta aperta relative alla literacy matematica. È stato utilizzato il database relativo al compendio degli item cognitivi, raggruppando gli item secondo le categorie matematiche del quadro di riferimento del PISA (contenuto, contesto, processo), a cui si è aggiunta la classificazione per livello di performance. La complessiva debolezza degli studenti italiani nelle domande aperte è determinata in particolare dall’alto tasso di omissioni e dai risultati molto scarsi in alcune categorie (“cambiamento e relazioni”, “ambito scientifico”, “formulazione matematica”). Gli studenti italiani ottengono risultati migliori in poche categorie (“contesto sociale”, “interpretazione e valutazione”, “spazio e forma”), che possono rappresentare un punto di partenza per il miglioramento. Viene discusso anche il possibile uso dei dati sulle domande aperte nella formazione degli insegnanti.
description: Form@re - Open Journal per la formazione in rete, Vol. 16 No. 1 (2016): Teaching methods for science and technology in schools
Semiotic mediation: from multiplication properties to arithmetical expressions
Creators: name: Maffia, Andrea
name: Mariotti, Maria Alessandra
Publisher: name: Form@re - Open Journal per la formazione in rete
Year: 2016

description: Multiplication is introduced early in primary school, but its properties are usually introduced after the rote memorization of multiplicative facts. In this paper we present a teaching experiment aimed to early introducing arithmetical properties of multiplication. It is realized through an artefact built on the rectangle model for multiplication. Children activity is designed and analyzed using Theory of Semiotic Mediation. The development of the relational meaning of arithmetical expressions is shown through the enchaining of representations from signs related to the activity with the artefact to mathematical ones. In particular, the role of the teacher in the process of semiotic mediation results as crucial. Mediazione semiotica: dalle proprietà della moltiplicazione alle espressioni aritmetiche La moltiplicazione viene presentata presto nella scuola primaria, ma le sue proprietà sono introdotte solo dopo che le cosiddette tabelline sono state memorizzate. Nell’articolo si presenta un teaching experiment volto a introdurre precocemente le proprietà della moltiplicazione per facilitare la memorizzazione di fatti moltiplicativi. L’esperimento è centrato sull’uso di un artefatto costruito sul modello rettangolare della moltiplicazione. L’attività degli studenti è progettata e analizzata nel quadro della Teoria della Mediazione Semiotica (TMS). Lo sviluppo del significato relazionale delle espressioni aritmetiche viene mostrato attraverso la concatenazione di rappresentazioni che vanno da segni strettamente legati all’attività con l’artefatto fino a segni matematici. In particolare, si evidenzia il ruolo dell’insegnante nello sviluppo del processo di mediazione semiotica.
description: Form@re - Open Journal per la formazione in rete, Vol. 16 No. 1 (2016): Teaching methods for science and technology in schools
Build your own clarithmetic I: Setup and completeness
Creators: name: Japaridze, Giorgi
Publisher: name: arXiv
Year: 2015
Subjects: subject: Logic in Computer Science (cs.LO)
subject: FOS: Computer and information sciences
subject: F.1.1; F.1.2; F.1.3
subject: 03F50, 03D75, 03D15, 68Q10, 68T27, 68T30

description: Clarithmetics are number theories based on computability logic (see http://www.csc.villanova.edu/~japaridz/CL/ ). Formulas of these theories represent interactive computational problems, and their "truth" is understood as existence of an algorithmic solution. Various complexity constraints on such solutions induce various versions of clarithmetic. The present paper introduces a parameterized/schematic version CLA11(P1,P2,P3,P4). By tuning the three parameters P1,P2,P3 in an essentially mechanical manner, one automatically obtains sound and complete theories with respect to a wide range of target tricomplexity classes, i.e. combinations of time (set by P3), space (set by P2) and so called amplitude (set by P1) complexities. Sound in the sense that every theorem T of the system represents an interactive number-theoretic computational problem with a solution from the given tricomplexity class and, furthermore, such a solution can be automatically extracted from a proof of T. And complete in the sense that every interactive number-theoretic problem with a solution from the given tricomplexity class is represented by some theorem of the system. Furthermore, through tuning the 4th parameter P4, at the cost of sacrificing recursive axiomatizability but not simplicity or elegance, the above extensional completeness can be strengthened to intensional completeness, according to which every formula representing a problem with a solution from the given tricomplexity class is a theorem of the system. This article is published in two parts. The present Part I introduces the system and proves its completeness, while Part II is devoted to proving soundness.
Characterizing existence of certain ultrafilters
Creators: name: Filipów, Rafał
name: Kowitz, Krzysztof
name: Kwela, Adam
Publisher: name: arXiv
Year: 2023
Subjects: subject: Logic (math.LO)
subject: FOS: Mathematics
subject: 03E17 (Primary), 03E05, 03E35, 03E50, 03E75 (Secondary)

description: Following Baumgartner [J. Symb. Log. 60 (1995), no. 2], for an ideal $\mathcal{I}$ on $ω$, we say that an ultrafilter $\mathcal{U}$ on $ω$ is an $\mathcal{I}$-ultrafilter if for every function $f:ω\toω$ there is $A\in \mathcal{U}$ with $f[A]\in \mathcal{I}$. If there is an $\mathcal{I}$-ultrafilter which is not a $\mathcal{J}$-ultrafilter, then $\mathcal{I}$ is not below $\mathcal{J}$ in the Katětov order $\leq_{K}$ (i.e. for every function $f:ω\toω$ there is $A\in \mathcal{I}$ with $f^{-1}[A]\notin \mathcal{J}$). On the other hand, in general $\mathcal{I}\not\leq_{K}\mathcal{J}$ does not imply that existence of an $\mathcal{I}$-ultrafilter which is not a $\mathcal{J}$-ultrafilter is consistent. We provide some sufficient conditions on ideals to obtain the equivalence: $\mathcal{I}\not\leq_{K}\mathcal{J}$ if and only if it is consistent that there exists an $\mathcal{I}$-ultrafilter which is not a $\mathcal{J}$-ultrafilter. In some cases when the Katětov order is not enough for the above equivalence, we provide other conditions for which a similar equivalence holds. We are mainly interested in the cases when the family of all $\mathcal{I}$-ultrafilters or $\mathcal{J}$-ultrafilters coincides with some known family of ultrafilters: P-points, Q-points or selective ultrafilters (a.k.a. Ramsey ultrafilters). In particular, our results provide a characterization of Borel ideals $\mathcal{I}$ which can be used to characterize P-points as $\mathcal{I}$-ultrafilters. Moreover, we introduce a cardinal invariant which is used to obtain a sufficient condition for the existence of an $\mathcal{I}$-ultrafilter which is not a $\mathcal{I}$-ultrafilter. Finally, we prove some new results concerning existence of certain ultrafilters under various set-theoretic assumptions.
Reconstructing the history of science education through its materiality
Creators: name: Pizzigoni, Francesca Davida
Publisher: name: Form@re - Open Journal per la formazione in rete
Year: 2016

description: “Things of Science” is a project promoted in 2014 by the Polytechnic of Turin in partnership with several other scientific territorial institutions that intended to survey and study the educational scientific historical heritage of schools in Turin. It aims to derive from material traces some testimonies of teaching science in different historical periods. Through the project, over 47.000 historical teaching aids have been made available representing a significant basis for numerous studies and insights as well as a safeguard action towards this important source for scientific research in terms of the materiality of the school and in particular of science in school. Ricostruire la storia della didattica scientifica attraverso la sua materialità “Cose di Scienza” è un progetto promosso nel 2014 dal Politecnico di Torino in partenariato con diverse altre realtà scientifiche territoriali che ha inteso censire e studiare il patrimonio didattico scientifico storico presente nelle scuole torinesi, al fine di ricavare dalle tracce materiali alcune testimonianze di didattica della scienza nei diversi periodi storici. Attraverso il progetto sono stati reperiti oltre 47.000 supporti didattici storici che costituiscono da un lato una significativa base per numerosi studi e approfondimenti, e dall’altro una azione di salvaguardia verso questa importante fonte per la ricerca scientifica costituita dalla materialità della scuola e in particolare della scienza a scuola.
description: Form@re - Open Journal per la formazione in rete, Vol. 16 No. 1 (2016): Teaching methods for science and technology in schools
Turbulence dynamics and flow speeds in the inner solar corona: Results from radio-sounding experiments by the Akatsuki spacecraft
Creators: name: Jain, Richa N.
name: Choudhary, R. K.
name: Bhardwaj, Anil
name: Imamura, T.
name: Sharma, Anshuman
name: Parikh, Umang M.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Space Physics (physics.space-ph)
subject: FOS: Physical sciences

description: The solar inner corona is a region that plays a critical role in energizing the solar wind and propelling it to supersonic and supra-Alfvenic velocities. Despite its importance, this region remains poorly understood because of being least explored due to observational limitations. The coronal radio sounding technique in this context becomes useful as it helps in providing information in parts of this least explored region. To shed light on the dynamics of the solar wind in the inner corona, we conducted a study using data obtained from coronal radio-sounding experiments carried out by the Akatsuki spacecraft during the 2021 Venus-solar conjunction event. By analyzing X-band radio signals recorded at two ground stations (IDSN in Bangalore and UDSC in Japan), we investigated plasma turbulence characteristics and estimated flow speed measurements based on isotropic quasi-static turbulence models. Our analysis revealed that the speed of the solar wind in the inner corona (at heliocentric distances from 5 to 13 solar radii), ranging from 220-550 km/sec, was higher than the expected average flow speeds in this region. By integrating our radio-sounding results with EUV images of the solar disk, we gained a unique perspective on the properties and energization of high-velocity plasma streams originating from coronal holes. We tracked the evolution of fast solar wind streams emanating from an extended coronal hole as they propagated to increasing heliocentric distances. Our study provides unique insights into the least-explored inner coronal region by corroborating radio sounding results with EUV observations of the corona.