cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Characterization of members of type IV and type IIC of human P-type ATPase
Creators: name: Liou, Angela Yen-Chun
Publisher: name: University of British Columbia
Year: 2017

description: P-type ATPases comprise a superfamily of proteins that play vital roles in the human body and can cause severe diseases if their functions are impaired. P₄-ATPases or type 4 of P-type ATPases are implicated in the ATP-dependent flipping of phospholipids across cell membranes. This generates and maintains transverse phospholipid asymmetry, a property important for biological processes including vesicle trafficking. ATP9A is a P₄-ATPase that remains poorly characterized despite its high expression in brain and testis. Interestingly, loss of Neo1p, the yeast ortholog of ATP9A, is lethal. The first part of this study investigates the functional properties and cellular localization of ATP9A. Human ATP9A was expressed in HEK293T cells and characterized using biochemical and cell-based approaches. ATP9A exhibited little if any phospholipid-dependent ATPase activity, but underwent hydroxylamine-sensitive phosphorylation, a characteristic feature of the P-type ATPase reaction cycle. A monoclonal antibody to ATP9A was generated for analysis of ATP9A in cells and brain tissues by western blotting and immunofluorescence microscopy. In transfected HEK293T cells ATP9A localized to perinuclear and peripheral punctate structures possibly related to the endocytic pathway. Our findings suggest that ATP9A undergoes autophosphorylation, but fails to dephosphorylate, possibly due to lack of an accessory protein or a specific substrate. Further studies on endogenous ATP9A should provide further insight into its physiological function and possible role in human disease. On the other hand, Na⁺/K⁺-ATPase (NKA) belongs to type 2C of P-type ATPases and establishes Na⁺ and K⁺ gradients across cell membranes. NKA has been shown to interact with retinoschisin (RS1), an adhesion protein essential for normal retinal structure and function. Mutations in the gene encoding RS1 cause a macular degeneration disorder called X-linked retinoschisis (XLRS). RS1 is thought to be anchored to the membranes of photoreceptor and bipolar cells through interaction with the α3 and β2 isoforms of NKA. The second part aims to characterize the RS1-NKA complex by generating monoclonal antibodies specific for the components. Indeed, immunoaffinity purification of NKAβ2 from bovine retinal membranes co-immunoprecipitated the α3 subunit and RS1. Tandem affinity purification of the native protein complexes should enhance understanding of the molecular and cellular mechanisms underlying XLRS.
Body size and sperm quality in queen- and worker-produced ant males
Creators: name: Giehr, Julia
name: Wallner, Jennifer
name: Krüger, Theresa
name: Heinze, Jürgen
Publisher: name: Universität Regensburg
Year: 2020
Subjects: subject: ants, male quality, sperm quality, Temnothorax, worker reproduction
subject: 590 Tiere (Zoologie)

description: Workers of many species of social Hymenoptera have functional ovaries and are capable of laying haploid, unfertilized eggs, at least in the absence of a queen. Except for honeybees, it remains largely unknown whether worker‐produced males have the same quality as queen‐produced males and whether workers benefit in direct fitness by producing their sons. Previous studies in the monogynous ant Temnothorax crassispinus revealed that a high proportion of males in natural and laboratory colonies are worker offspring. Here, we compare longevity, body size, sperm length and sperm viability between queen‐ and worker‐produced males. We either split queenright colonies into queenright and queenless halves or removed the queen from a fraction of the queenright colonies and then examined the newly produced males. Male quality traits varied considerably among colonies but differed only slightly between queen‐ and worker‐produced males. Worker‐produced males outnumbered queen‐produced males and also had a longer lifespan, but under certain rearing conditions sperm from queen‐produced males had a higher viability.
The Minimum Detectable Difference (MDD) Concept for Establishing Trust in Nonsignificant Results: A Critical Review
Creators: name: Mair, Magdalena M.
name: Kattwinkel, Mira
name: Jakoby, Oliver
name: Hartig, Florian
Publisher: name: Universität Regensburg
Year: 2020
Subjects: subject: Minimum significant difference, Least significant difference, Minimum detectable change. Post hoc power, Statistical ecotoxicology, Risk assessment
subject: 580 Pflanzen (Botanik)

description: Current regulatory guidelines for pesticide risk assessment recommend that nonsignificant results should be complemented by the minimum detectable difference (MDD), a statistical indicator that is used to decide whether the experiment could have detected biologically relevant effects. We review the statistical theory of the MDD and perform simulations to understand its properties and error rates. Most importantly, we compare the skill of the MDD in distinguishing between true and false negatives (i.e., type II errors) with 2 alternatives: the minimum detectable effect (MDE), an indicator based on a post hoc power analysis common in medical studies; and confidence intervals (CIs). Our results demonstrate that MDD and MDE only differ in that the power of the MDD depends on the sample size. Moreover, although both MDD and MDE have some skill in distinguishing between false negatives and true absence of an effect, they do not perform as well as using CI upper bounds to establish trust in a nonsignificant result. The reason is that, unlike the CI, neither MDD nor MDE consider the estimated effect size in their calculation. We also show that MDD and MDE are no better than CIs in identifying larger effects among the false negatives. We conclude that, although MDDs are useful, CIs are preferable for deciding whether to treat a nonsignificant test result as a true negative, or for determining an upper bound for an unknown true effect. Environ Toxicol Chem 2020;39:2109–2123. © 2020 The Authors. Environmental Toxicology and Chemistry published by Wiley Periodicals LLC on behalf of SETAC.
Nine years of online mentoring for secondary school girls in STEM: an empirical comparison of three mentoring formats
Creators: name: Stöger, Heidrun
name: Heilemann, Michael
name: Debatin, Tobias
name: Schirner, Sigrun
Publisher: name: Universität Regensburg
Year: 2021
Subjects: subject: STEM participation rates, latent growth curve model, STEM communication, network analysis
subject: 370 Erziehung, Schul- und Bildungswesen

description: Online mentoring can be useful for supporting girls in science, technology, engineering, and mathematics (STEM). Yet, little is known about the differential effects of various online mentoring formats. We examine the general and relative effectiveness of three online mentoring formats, one‐on‐one mentoring, many‐to‐many group mentoring, and a hybrid form of the two. All three formats were implemented in different years in the Germany‐wide online‐only mentoring program, CyberMentor, whose platform enables communication and networking between up to 800 girls (in grades 5–13) and 800 women (STEM professionals) each year. We combined longitudinal mentee data for all first‐year participants (N = 4017 girls, Mage = 14.15 years) from 9 consecutive mentoring years to evaluate and compare the three mentoring formats. Overall, all formats effected comparable increases in mentees’ STEM activities and certainty about career plans. However, mentees’ communication behavior and networking behavior on the mentoring platform differed between the three formats. Mentees in the hybrid mentoring format showed the most extensive STEM‐related communication and networking on the platform. We also analyzed the explanatory contributions of STEM‐related communication and networking on interindividual differences in the developmental trajectories of mentees’ STEM activities, elective intentions in STEM, and certainty about career plans, for each format separately.
Sports and mathematical abilities in primary school-aged children: How important are spatial abilities? An explorative study
Creators: name: Jansen, Petra
name: Pietsch, Stefanie
Publisher: name: Universität Regensburg
Year: 2020
Subjects: subject: Primary school-aged children . Intrinsic and extrinsic spatial abilities . Sport performance . Numerical knowledge . Geometrical abilities
subject: 370 Erziehung, Schul- und Bildungswesen
subject: 796 Sport

description: It is well known that sports and mathematical abilities are related to spatial abilities, also a relation between sport and mathematical abilities is assumed. However, the relation between all three aspects has not been investigated until now. Therefore, the main goal of the study is to examine the relationship between sport, spatial and mathematical ability in elementary school aged children. 50 boys and 42 girls from third grade solved spatial and sport tasks, which can be differentiated into the following: intrinsic-dynamic, intrinsic-static and extrinsic-static. Furthermore, their performances in mathematical (separated into numerical/arithmetical and geometrical) abilities were analyzed. The results showed significant correlations between the static spatial and sporting activities. This correlation is due to the strong correlation within the group of girls. Furthermore, a good performance in the intrinsic spatial ability was related to a high geometrical ability of the children, especially in boys. However, the geometrical ability could not be predicted by sport abilities.
Relativistic static magnetized finite thin disk: An infinite family of exact solutions
Creators: name: Gutiérrez-Piñeres, Antonio C.
name: González, Guillermo A.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: An infinite family of relativistic finite thin disk model with magnetic field is presented. The model is obtained for solving the Einstein-Maxwell equations for static spacetimes by means of the Horský-Mitskievitch generating conjecture. The vacuum limit of these obtained solutions is the well known Morgan and Morgan solution. The obtained expressions are simply written in terms of oblate spheroidal coordinates. The mass of the disks are finite and the energy-momentum tensor agrees with all the energy conditions. The magnetic field and the circular velocity are evaluated explicitly. All the physical quantities obtained shown an acceptable
description: Replaced with revised version. Prepared for the Proceedings of Spanish Relativity Meeting (ERE2010), Granada, Spain, 6-10 Sept 2010. Published in Journal of Physics: Conference Series 314 012090 (2011)
MPEC 2023-H248 : DAILY ORBIT UPDATE (2023 April 30)
Creators: name: Minor Planet Center Staff
Publisher: name: The Minor Planet Center
Year: 2023
Subjects: subject: Small Solar System bodies
valueUri: http://astrothesaurus.org/uat/1469

description: The Minor Planet Electronic Circulars contain information on unusual minor planets, routine data on comets and natural satellites, and occasional editorial announcements.  They are published on behalf of Division F of the International Astronomical Union by the Minor Planet Center, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Bloch Solutions of Periodic Dirac Equations in SPPS Form
Creators: name: Khmelnytskaya, K. V.
name: Rosu, H. C.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences
subject: 34B24 (Primary) 34C25 (Secondary)

description: We provide the representation of quasi-periodic solutions of periodic Dirac equations in terms of the spectral parameter power series (SPPS) recently introduced by V.V. Kravchenko (2008,2009). We also give the SPPS form of the Dirac Hill discriminant under the Darboux nodeless transformation using the SPPS form of the discriminant and apply the results to one of Razavy's quasi-exactly solvable periodic potentials
description: 10 pages, 2 figures, references updated, contribution for IWOTA-09 proceedings
Higgs production at the lHC
Creators: name: Baglio, Julien
name: Djouadi, Abdelhak
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We analyze the production of Higgs particles at the early stage of the CERN large Hadron Collider with a 7 TeV center of mass energy (lHC). We first consider the case of the Standard Model Higgs boson that is mainly produced in the gluon-gluon fusion channel and to be detected in its decays into electroweak gauge bosons, $gg\to H \to WW,ZZ,γγ$. The production cross sections at $\sqrt s=7$ TeV and the decay branching ratios, including all relevant higher order QCD and electroweak corrections, are evaluated. An emphasis is put on the various theoretical uncertainties that affect the production rates: the significant uncertainties from scale variation and from the parametrization of the parton distribution functions as well as the uncertainties which arise due to the use of an effective field theory in the calculation of the next-to-next-to-leading order corrections. The parametric uncertainties stemming from the values of the strong coupling constant and the heavy quark masses in the Higgs decay branching ratios, which turn out to be non-negligible, are also discussed. The implications for different center of mass energies of the proton collider, $\sqrt s=8$-10 TeV as well as for the design energy $\sqrt s= 14$ TeV, are briefly summarized. We then discuss the production of the neutral Higgs particles of the Minimal Supersymmetric extension of the Standard Model in the two main channels: gluon-gluon and bottom quark fusion leading to Higgs bosons which subsequently decay into tau lepton or $b$-quark pairs, $gg, b\bar b \to {\rm Higgs} \to τ^+τ^-,b\bar b$. The Higgs production cross sections at the $\lhc$ and the decay branching ratios are analyzed. The associated theoretical uncertainties are found to be rather large and will have a significant impact on the parameter space of the model that can be probed.
description: 49 pages, 19 figures, 9 tables. Addendum included compared to published version with updated results at a c.m. energy of 8 TeV
Fabry-Pérot Oscillations in Correlated Carbon Nanotubes
Creators: name: Yang, Wei
name: Urgell, C.
name: De Bonis, S. L.
name: Marganska, Magdalena
name: Grifoni, Milena
name: Bachthold, A.
Publisher: name: Universität Regensburg
Year: 2020
Subjects: subject: 530 Physik

description: We report the observation of an intriguing behavior in the transport properties of nanodevices operating in a regime between the Fabry-Pérot and the Kondo limits. Using ultrahigh quality nanotube devices, we study how the conductance oscillates when sweeping the gate voltage. Surprisingly, we observe a fourfold enhancement of the oscillation period upon decreasing temperature, signaling a crossover from single-electron tunneling to Fabry-Pérot interference. These results suggest that the Fabry-Pérot interference occurs in a regime where electrons are correlated. The link between the measured correlated Fabry-Pérot oscillations and the SU(4) Kondo effect is discussed.
A Review of Deep Learning Approaches for Non-Invasive Cognitive Impairment Detection
Creators: name: Alsuhaibani, Muath
name: Fard, Ali Pourramezan
name: Sun, Jian
name: Poor, Farida Far
name: Pressman, Peter S.
name: Mahoor, Mohammad H.
Publisher: name: arXiv
Year: 2024
Subjects: subject: Machine Learning (cs.LG)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: This review paper explores recent advances in deep learning approaches for non-invasive cognitive impairment detection. We examine various non-invasive indicators of cognitive decline, including speech and language, facial, and motoric mobility. The paper provides an overview of relevant datasets, feature-extracting techniques, and deep-learning architectures applied to this domain. We have analyzed the performance of different methods across modalities and observed that speech and language-based methods generally achieved the highest detection performance. Studies combining acoustic and linguistic features tended to outperform those using a single modality. Facial analysis methods showed promise for visual modalities but were less extensively studied. Most papers focused on binary classification (impaired vs. non-impaired), with fewer addressing multi-class or regression tasks. Transfer learning and pre-trained language models emerged as popular and effective techniques, especially for linguistic analysis. Despite significant progress, several challenges remain, including data standardization and accessibility, model explainability, longitudinal analysis limitations, and clinical adaptation. Lastly, we propose future research directions, such as investigating language-agnostic speech analysis methods, developing multi-modal diagnostic systems, and addressing ethical considerations in AI-assisted healthcare. By synthesizing current trends and identifying key obstacles, this review aims to guide further development of deep learning-based cognitive impairment detection systems to improve early diagnosis and ultimately patient outcomes.
Direct Numerical Demonstration of Sign-preserving Quasiparticle Interference via Impurity inside Vortex Core in Unconventional Superconductors
Creators: name: Nagai, Yuki
name: Nakai, Noriyuki
name: Machida, Masahiko
Publisher: name: arXiv
Year: 2011
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We perform large-scale numerical calculations self-consistently solving the Bogoliubov-de Gennes (BdG) equations in the magnetic field together with random impurities to directly demonstrate the typical quasi-particle interference (QPI) in the presence of vortices as observed by scanning tunneling microscopy/spectroscopy experiments in unconventional superconductors. The calculations reveal that vortex itself never works as a scatter causing the QPI pattern but vortex core containing impurity brings about the enhancement of the sign-preserving QPI peaks. Its origin is Andreev bound-states distorted by impurity, and all the measurement findings are consistently explained by the scenario based on the numerical results.
description: 5 pages, 4 figures, published in Phys. Rev. B
dynamic : An R Package for Deriving Dynamic Fit Index Cutoffs for Factor Analysis
Creators: name: Wolf, Melissa G.
name: McNeish, Daniel
Publisher: name: Taylor & Francis
Year: 2023
Subjects: subject: Biophysics
subject: Biochemistry
subject: Cell Biology
subject: Genetics
subject: FOS: Biological sciences
subject: Biotechnology
subject: 69999 Biological Sciences not elsewhere classified
subject: 19999 Mathematical Sciences not elsewhere classified
subject: FOS: Mathematics
subject: Cancer
subject: Science Policy
subject: 111714 Mental Health
subject: FOS: Health sciences

description: To evaluate the fit of a confirmatory factor analysis model, researchers often rely on fit indices such as SRMR, RMSEA, and CFI. These indices are frequently compared to benchmark values of .08, .06, and .96, respectively, established by Hu and Bentler (Cutoff criteria for fit indexes in covariance structure analysis: Conventional criteria versus new alternatives. Structural Equation Modeling, 6(1), 1–55). However, these indices are affected by model characteristics and their sensitivity to misfit can change across models. Decisions about model fit can therefore be improved by tailoring cutoffs to each model. The methodological literature has proposed methods for deriving customized cutoffs, although it can require knowledge of linear algebra and Monte Carlo simulation. Given that many empirical researchers do not have training in these technical areas, empirical studies largely continue to rely on fixed benchmarks even though they are known to generalize poorly and can be poor arbiters of fit. To address this, this paper introduces the R package, dynamic, to make computation of dynamic fit index cutoffs (which are tailored to the user’s model) more accessible to empirical researchers. dynamic heavily automatizes this process and only requires a lavaan object to automatically conduct several custom Monte Carlo simulations and output fit index cutoffs designed to be sensitive to misfit with the user’s model characteristics.
Parameter extraction for photovoltaic device performance characterization
Creators: name: Sharma, Ravi
Publisher: name: University of British Columbia
Year: 2017

description: Photovoltaic systems for solar energy harvesting have seen accelerated growth over the past few decades. Crystalline silicon based photovoltaic systems are one of the most widespread photovoltaic solar cell technologies in use today. Such increased penetration of the photovoltaic systems creates new opportunities but also raises challenges, for photovoltaic manufacturers that are tasked with making their product more reliable and of good quality. As a final step during the fabrication of photovoltaic solar cells or modules, the current-voltage characteristics corresponding to each finished product, are measured under standard testing conditions. Measurement of electrical characteristics of the finished product is important for qualification purposes. For quality assessment purposes, certain metrics associated with the current-voltage characteristics, such as open-circuit voltage, short-circuit current, maximum current, maximum voltage, etc., are used based on a chi-by-the-eye method in adjudicating as to whether a given photovoltaic device is of “good” quality. In doing so, only a few of the salient points in the current voltage characteristic are utilized, while detailed information, inherent in the current-voltage characteristic, is not considered. In this thesis, means whereby empirical models of photovoltaic solar cells or modules may be used to fit the experimentally measured current-voltage characteristics is proposed. Accordingly, model parameters that can be used to characterize photovoltaic solar cells or modules are extracted from their measured current-voltage characteristics. These model parameters include photo-generated current, reverse saturation current, diode ideality factor, series resistance, and shunt resistance. For the realization of this objective, one of the most commonly used models to predict the current-voltage characteristic of a photovoltaic solar cell or module is adopted. A curve fitting approach is proposed based on a non-linear optimization technique to extract model parameters associated with given current-voltage characteristics. In this thesis, computational solutions are developed for accurately extracting model parameters. The presented research spans from performance modeling, parameter estimation methods, to application of an optimization algorithm. Both experimental and standard data are used to investigate the accuracy of the extracted model parameter results obtained to validate the optimal performance of the proposed technique. The possible applications of this approach are discussed.
Vascular biology of marfan syndrome : angiotensin II receptors, losartan, and nitric oxide
Creators: name: Sellers, Stephanie Leigh
Publisher: name: University of British Columbia
Year: 2018

description: Marfan syndrome (MFS), a connective tissue disorder triggered by mutations in Fibrillin-1, causes life-threatening pathology including aortic aneurysm. Recently, controversy has arisen regarding the use of anti-hypertensive angiotensin-II (AngII) receptor type 1 (ATR1) blocker losartan in MFS as, despite success in animal models, losartan has failed to show superiority over standard β-adrenergic receptor blocker atenolol in preventing or slowing expansion of aortic root aneurysm in MFS patients. Overall, we hypothesized that we could provide new insight into this controversy via development of a novel MFS murine model lacking functional ATR1 signaling. Herein, using this novel model, we demonstrate that MFS aortic, pulmonary and skeletal pathology as well as the therapeutic benefit of losartan in MFS aneurysm prevention are ATR1-independent. Instead, we reveal the primary therapeutic pathway of losartan in MFS to be nitric oxide synthase (NOS)-dependent, as treatment of MFS aneurysm in vivo has no benefit upon inhibition of NOS. Furthermore, losartan is shown to mediate increased NO release in endothelial cells in the absence of AngII and correct NO levels in the plasma of MFS mice. In addition, declining plasma nitric oxide (NO) levels in mice were found to correlate to increasing aortic aneurysm size and sub-analysis of patients treated with losartan shows indices of improved endothelial function to correlate to regression of aortic aneurysm. Finally, we demonstrate the clinical potential of targeting endothelial dysfunction in MFS as murine models of endothelial nitric oxide synthase (eNOS) over-expression and hyper-activation as well as pharmacological activation of endogenous eNOS all result in prevention of MFS aneurysm. Overall, this study is the first to identify key aspects of MFS pathology and treatment including the ATR1-independent nature of MFS aortic, lung, and skeletal pathology and therapeutic benefit of losartan. Moreover, these studies are the first to show a NOS-dependent mechanism of losartan and therapeutic benefit of increasing NO bioavailability and improving endothelial function in MFS. As such, they collectively provide a basis for guiding the evolution of managing and treating MFS as well as future pharmaceutical development.
Rüstungspolitik im Zeichen des Versagens: Die Trendwende Material der Bundeswehr zwischen Anspruch und Realität
Creators: name: Sebaldt, Martin
Publisher: name: Universität Regensburg
Year: 2020
Subjects: subject: Bundeswehr · Rüstung · Militär · Verteidigung · Streitkräfte
subject: 320 Politik

description: Die deutsche Rüstungspolitik versagt: Seit einigen Jahren steht sie unter dem Motto Trendwende Material, und trotzdem ist es ihr nicht gelungen, die prekäre Ausstattungslage der Bundeswehr signifikant zu verbessern. Eine Auseinandersetzung mit den zentralen militärpolitischen Planungsdokumenten der letzten Jahre (Verteidigungsweißbuch, Konzeption der Bundeswehr, Strategie der Reserve) enthüllt den entscheidenden Grund dieses Versagens: strategisch konzeptionelles Unvermögen. Folgerung: Nur eine grundlegende Erneuerung militärpolitischer Strategiearbeit kann dieses rüstungspolitische Unvermögen beheben.
Nonassociative strict deformation quantization of C*-algebras and nonassociative torus bundles
Creators: name: Hannabuss, K. C.
name: Mathai, V.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Quantum Algebra (math.QA)
subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: Operator Algebras (math.OA)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 46L70

description: In this paper, we initiate the study of nonassociative strict deformation quantization of C*-algebras with a torus action. We shall also present a definition of nonassociative principal torus bundles, and give a classification of these as nonassociative strict deformation quantization of ordinary principal torus bundles. We then relate this to T-duality of principal torus bundles with $H$-flux. We also show that the Octonions fit nicely into our theory.
description: 15 pages, latex2e, exposition improved, to appear in LMP
Investigating the Normativity of Trait Estimates from Multidimensional Forced-Choice Data
Creators: name: Frick, Susanne
name: Brown, Anna
name: Wetzel, Eunike
Publisher: name: Taylor & Francis
Year: 2021
Subjects: subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: Science Policy
subject: Plant Biology

description: The Thurstonian item response model (Thurstonian IRT model) allows deriving normative trait estimates from multidimensional forced-choice (MFC) data. In the MFC format, persons must rank-order items that measure different attributes according to how well the items describe them. This study evaluated the normativity of Thurstonian IRT trait estimates both in a simulation and empirically. The simulation investigated normativity and compared Thurstonian IRT trait estimates to those using classical partially ipsative scoring, from dichotomous true-false (TF) data and rating scale data. The results showed that, with blocks of opposite keyed items, Thurstonian IRT trait estimates were normative in contrast to classical partially ipsative estimates. Unbalanced numbers of items per trait, few opposite keyed items, traits correlated positively or assessing fewer traits did not decrease measurement precision markedly. Measurement precision was lower than that of rating scale data. The empirical study investigated whether relative MFC responses provide a better differentiation of behaviors within persons than absolute TF responses. However, criterion validity was equal and construct validity (with constructs measured by rating scales) lower in MFC. Thus, Thurstonian IRT modeling of MFC data overcomes the drawbacks of classical scoring, but gains in validity may depend on eliminating common method biases from the comparison.
Antiferromagnetic Potts model on the Erdos-Renyi random graph
Creators: name: Contucci, Pierluigi
name: Dommers, Sander
name: Giardina', Cristian
name: Starr, Shannon
Publisher: name: arXiv
Year: 2011
Subjects: subject: Probability (math.PR)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 60B10, 60G57, 82B20, 60K35

description: We study the antiferromagnetic Potts model on the Poissonian Erdös-Rényi random graph. By identifying a suitable interpolation structure and an extended variational principle, together with a positive temperature second-moment analysis we prove the existence of a phase transition at a positive critical temperature. Upper and lower bounds on the temperature critical value are obtained from the stability analysis of the replica symmetric solution (recovered in the framework of Derrida-Ruelle probability cascades)and from a positive entropy argument.
description: 36 pages, revisions to improve result
An Application of Bayes’ Theorem to a Problem of Cultural Astronomy Interest
Creators: name: Gaspani Adriano
name: Spagocci Stefano
Publisher: name: Cultural Heritage and Modern Technologies
Year: 2025
Subjects: Bayes’ theorem
Celts
Cisalpine Gaul
Dating
Druids
Enclosure
Sanctuary

description: In this paper, an elliptical enclosure, found at Piani d’Avaro (Bergamo Province, Lombardy, Northern Italy) was examined from an astronomical point of view. Due to earlier studies by one of the authors (Gaspani), its internal structures were known to be astronomically aligned and suspected to date back to the Iron Age but the external enclosure was thought to be Late-Medieval. Using a dating algorithm, devised by the authors, it was confirmed that the site is astronomically aligned. Lunar and solar alignments are reported, among which we mention those at sunrise and sunset on the four main Celtic festivals. We found out that the site had two building phases. In the first phase, 510±20 BC, the internal structures were erected and aligned. In the second phase, 340±20 BC, the elliptical enclosure was built and aligned. An innovative application of Bayes’ theorem allowed us to estimate the probability that the enclosure was dimensioned by a priestess; this probability was found to be (55±8)%. This suggests that, with a probability of (72±8)%, there were both male and female druids (in the same sense as in the rest of Celtic Europe?) in Cisalpine Gaul. More significantly, we found out that the Bayes factor, estimated to be greater than ~(5.7±0.8) according to the Kass-Raftery scale, suggests that the structures provide “more than substantial” evidence for the presence of druidesses in Cisalpine Gaul.
Global Forces in Eruptive Solar Flares: The Lorentz force Acting on the Solar Atmosphere and the Solar Interior
Creators: name: Fisher, George H.
name: Bercik, David J.
name: Welsch, Brian T.
name: Hudson, Hugh S.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We compute the change in the Lorentz force integrated over the outer solar atmosphere implied by observed changes in vector magnetograms that occur during large, eruptive solar flares. This force perturbation should be balanced by an equal and opposite force perturbation acting on the solar photosphere and solar interior. The resulting expression for the estimated force change in the solar interior generalizes the earlier expression presented by Hudson, Fisher and Welsch (CS-383, ASP, 221, 2008), providing horizontal as well as vertical force components, and provides a more accurate result for the vertical component of the perturbed force. We show that magnetic eruptions should result in the magnetic field at the photosphere becoming more horizontal, and hence should result in a downward (towards the solar interior) force change acting on the photosphere and solar interior, as recently argued from an analysis of magnetogram data by Wang and Liu (Astrophys. J. Lett. 716, L195, 2010). We suggest the existence of an observational relationship between the force change computed from changes in the vector magnetograms, the outward momentum carried by the ejecta from the flare, and the properties of the helioseismic disturbance driven by the downward force change. We use the impulse driven by the Lorentz-force change in the outer solar atmosphere to derive an upper limit to the mass of erupting plasma that can escape from the Sun. Finally, we compare the expected Lorentz-force change at the photosphere with simple estimates from flare-driven gasdynamic disturbances and from an estimate of the perturbed pressure from radiative backwarming of the photosphere in flaring conditions.
description: 23 pages, 6 figures. Accepted by Solar Physics, Nov. 11, 2011
A Variable Selection Algorithm for Creating Replicable Factor Structures
Creators: name: Sass, Daniel A.
name: Sanchez, Michael A.
Publisher: name: Taylor & Francis
Year: 2023
Subjects: subject: Space Science
subject: Biotechnology
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: 19999 Mathematical Sciences not elsewhere classified
subject: FOS: Mathematics
subject: Science Policy
subject: Hematology

description: Exploratory and confirmatory factor analyses are commonly employed to identify and explore underlying factor structures. Unfortunately, when variable selection is involved, results often fluctuate across studies making it difficult to determine the “best” and most replicable factor structure. This study proposes a new factor analysis variable selection algorithm called the Replicable Factor Analytic Solutions (RFAS) that incorporates sound statistical and psychometric practices when selecting the final factor structure, while simultaneously examining the observed variables and factor structures replicability. This article outlines the algorithm development and rationale for each decision in the algorithm’s development. An example using simulated and empirical data is also provided to display the algorithm results and delineate the utility of these results for future analysts.
Toward a language theoretic proof of the four color theorem
Creators: name: Cooper, Bobbe
name: Rowland, Eric
name: Zeilberger, Doron
Publisher: name: arXiv
Year: 2010
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 68R15, 05A15, 68Q42, 05C15

description: This paper considers the problem of showing that every pair of binary trees with the same number of leaves parses a common word under a certain simple grammar. We enumerate the common parse words for several infinite families of tree pairs and discuss several ways to reduce the problem of finding a parse word for a pair of trees to that for a smaller pair. The statement that every pair of trees has a common parse word is equivalent to the statement that every planar graph is four-colorable, so the results are a step toward a language theoretic proof of the four color theorem.
description: 18 pages, many images; final version
From structure to function: route to understanding lncRNA mechanism
Creators: name: Graf, Johannes
name: Kretz, Markus
Publisher: name: Universität Regensburg
Year: 2020
Subjects: subject: lncRNA, long noncoding RNA
subject: 570 Biowissenschaften, Biologie

description: RNAs have emerged as a major target for diagnostics and therapeutics approaches. Regulatory nonprotein‐coding RNAs (ncRNAs) in particular display remarkable versatility. They can fold into complex structures and interact with proteins, DNA, and other RNAs, thus modulating activity, localization, or interactome of multi‐protein complexes. Thus, ncRNAs confer regulatory plasticity and represent a new layer of regulatory control. Interestingly, long noncoding RNAs (lncRNAs) tend to acquire complex secondary and tertiary structures and their function—in many cases—is dependent on structural conservation rather than primary sequence conservation. Whereas for many proteins, structure and its associated function are closely connected, for lncRNAs, the structural domains that determine functionality and its interactome are still not well understood. Numerous approaches for analyzing the structural configuration of lncRNAs have been developed recently. Here, will provide an overview of major experimental approaches used in the field, and discuss the potential benefit of using combinatorial strategies to analyze lncRNA modes of action based on structural information.
Avaliação psicológica na justiça da infância e juventude: contexto e perspectivas para o século XXI
Creators: name: Coimbra, José César
Publisher: name: Zenodo
Year: 2019
Subjects: avaliação psicológica
infância e juventude
equipe interprofissional

description: Este artigo apresenta três objetivos. O primeiro deles é o de apontar e analisar as definições de trabalho da equipe interprofissional existentes no ECA, em particular aquelas que poderiam ser associadas com a realização de avaliação psicológica. O seu segundo objetivo é o de estabelecer correspondências entre essas definições e as demandas dirigidas ao psicólogo no poder judiciário. O terceiro e último objetivo é o de justificar a importância da reflexão acerca do destinatário do trabalho realizado no que se refere às discussões sobre avaliação psicológica no âmbito da justiça da infância e da juventude.
Tan's universal contact and collective oscillations of strongly interacting Fermi gases
Creators: name: DelloStritto, Mark
name: De Silva, Theja N.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: We study strongly interacting two component Fermi gas near a Feshbach resonance. By using a ground state energy functional constructed based on asymptotic limits and Monte Carlo calculations, we calculate the contact, structure factor, and collective oscillation frequencies in the BCS-BEC crossover region. The calculated contact and structure factor show excellent agreements with recent experiments. We compare these results with a standard mean-field theory and find that the contact is proportional to the square of superfluid order parameter. Further, we present the chemical potential and the polytropic index in terms of homogenous energy and the contact.
description: Accepted to be published in Physics Letters A
Analysis and design of analog interface circuits for capacitive detector readout systems
Creators: name: Beikahmadi, Mohammad
Publisher: name: University of British Columbia
Year: 2018

description: Advances in sub-micron complimentary metal-oxide semiconductor (CMOS) technologies have enabled implementation of ultra-low-power circuits and systems for variety of applications including readout systems for capacitive radiation detectors. As state-of-the-art readout systems may integrate thousands of electronic channels on chip, designing low-power and low-noise interface circuits is of great interest. The focus of this work is on developing a design methodology for such readout circuits with an emphasis on interfacing with capacitive sensors, in general, and solid-state radiation detectors, in particular. The critical aspects of the design from analyzing the specifications to noise optimization and circuit design are taken into account and the proposed circuits offer improved performance for the readout system. To facilitate the noise analysis of modern readout systems, the equivalent noise charge equations of the system are derived analytically. The analysis takes into account the stringent requirements of modern readout systems as well as the noise sources associated with deep submicron CMOS technologies. The analysis is based on the EKV (Enz, Krummenacher, and Vittoz) model of MOS transistors which is a model valid for all regions of operation. As a proof of concept, the analysis and design of three low-power and low-noise interface circuits are presented. The proposed circuits are fabricated in a 0.13 um CMOS process. The first interface circuit consists of a novel charge-sensitive amplifier (CSA), a pole-zero cancellation (PZC) circuit, and a 2nd-order programmable pulse shaper. The proposed CSA accepts signals of both polarities, exhibits 111 e-rms noise, and consumes only 37.5 uW. The second interface circuit consists of a CSA, a reset network, a 1st-order shaper, and a PZC circuit. The circuit consumes about 1 mW and exhibits 66 to 101 e-rms noise at different peaking times. The third interface circuit is a mixed-signal design and consists of a CSA with leakage compensation, a 5th-order programmable Gaussian shaper, a peak-detect and hold, a discriminator, and a novel Wilkinson-based digitizer. The circuit consumes 1.97 mW and exhibits 58 e-rms noise. The design performs favourably in terms of power consumption and noise behavior in comparison with similar works in the literature.
Lifelines: The Traffic of Trauma (A Book Review)
Creators: name: Singh, Rana Abhyendra
Publisher: name: Zenodo
Year: 2023
Subjects: Lifelines,Visiting,"Tracing, Seeing, Breathing, Dissecting, Recovering

description: Lifelines: The Traffic of Trauma is a medical ethnography authored by Harris Solomon. The book chronologically documents trauma's occurrence, treatment, and recovery. The book is quite thorough and educational. As the author conducts study in hospitals, it provides us with insights on numerous dimensions.
On the behaviours produced by instruction sequences under execution
Creators: name: Bergstra, J. A.
name: Middelburg, C. A.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Programming Languages (cs.PL)
subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: Logic in Computer Science (cs.LO)
subject: FOS: Computer and information sciences
subject: D.1.4; D.2.1; F.1.1; F.1.2; F.3.2
subject: 68N19, 68N30, 68Q05, 68Q10, 68Q55, 68Q85

description: We study several aspects of the behaviours produced by instruction sequences under execution in the setting of the algebraic theory of processes known as ACP. We use ACP to describe the behaviours produced by instruction sequences under execution and to describe two protocols implementing these behaviours in the case where the processing of instructions takes place remotely. We also show that all finite-state behaviours considered in ACP can be produced by instruction sequences under execution.
description: 36 pages, consolidates material from arXiv:0811.0436 [cs.PL], arXiv:0902.2859 [cs.PL], and arXiv:0905.2257 [cs.PL]; abstract and introduction rewritten, examples and proofs added
Loop models, random matrices and planar algebras
Creators: name: Guionnet, A.
name: Jones, V. F. R.
name: Shlyakhtenko, D.
name: Zinn-Justin, P.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Operator Algebras (math.OA)
subject: Combinatorics (math.CO)
subject: FOS: Mathematics

description: We define matrix models that converge to the generating functions of a wide variety of loop models with fugacity taken in sets with an accumulation point. The latter can also be seen as moments of a non-commutative law on a subfactor planar algebra. We apply this construction to compute the generating functions of the Potts model on a random planar map.
Anisotropy and Mechanistic Elucidation of Wet-Chemical Gallium Nitride Etching at the Atomic Level
Creators: name: Tautz, Markus
name: Weimar, Andreasa
name: Graßl, Christian
name: Diaz Diaz, David
Publisher: name: Universität Regensburg
Year: 2020
Subjects: subject: anisotropy, etching, gallium nitride, light-emitting diodes, mechanism
subject: 540 Chemie

description: Etching of gallium nitride is a key step in the production of blue and white light‐emitting diodes (LEDs). Etching in aqueous KOH solution creates a rough surface on the LED chip to facilitate outcoupling of the photons generated, drastically increasing the resulting LED's efficiency. Compared with the common technique of dry etching, wet‐chemical etching using aqueous KOH solution has significant advantages, e.g., lower complexity and cost and less remaining surface damage. An in‐depth analysis of the molecular etch reaction by characterization of the reaction products is reported. The mechanism identified explains the cause of anisotropic etching, which leads to the formation of hexagonal pyramids. The concept of hydroxide repulsion by protruding NH and NH2 groups established in the literature is adapted and further developed. The susceptibility of several polar, semipolar, and nonpolar crystal facets may also be explained, as well as the commonly observed increase in average pyramid size over etch time.
Towards Loop Quantum Supergravity (LQSG)
Creators: name: Bodendorfer, Norbert
name: Thiemann, Thomas
name: Thurn, Andreas
Publisher: name: arXiv
Year: 2011
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences
subject: 83C05, 83E50, 83E15

description: Should nature be supersymmetric, then it will be described by Quantum Supergravity at least in some energy regimes. The currently most advanced description of Quantum Supergravity and beyond is Superstring Theory/M-Theory in 10/11 dimensions. String Theory is a top-to-bottom approach to Quantum Supergravity in that it postulates a new object, the string, from which classical Supergravity emerges as a low energy limit. On the other hand, one may try more traditional bottom-to-top routes and apply the techniques of Quantum Field Theory. Loop Quantum Gravity (LQG) is a manifestly background independent and non-perturbative approach to the quantisation of classical General Relativity, however, so far mostly without supersymmetry. The main obstacle to the extension of the techniques of LQG to the quantisation of higher dimensional Supergravity is that LQG rests on a specific connection formulation of General Relativity which exists only in D+1 = 4 dimensions. In this Letter we introduce a new connection formulation of General Relativity which exists in all space-time dimensions. We show that all LQG techniques developed in D+1 = 4 can be transferred to the new variables in all dimensions and describe how they can be generalised to the new types of fields that appear in Supergravity theories as compared to standard matter, specifically Rarita-Schwinger and p-form gauge fields.
description: 9 pages. v2: minor improvements in presentation, virtually identical to published version