cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Dynamical formulation of low-energy scattering in one dimension
Creators: name: Loran, Farhang
name: Mostafazadeh, Ali
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The transfer matrix ${\mathbf{M}}$ of a short-range potential may be expressed in terms of the time-evolution operator for an effective two-level quantum system with a time-dependent non-Hermitian Hamiltonian. This leads to a dynamical formulation of stationary scattering. We explore the utility of this formulation in the study of the low-energy behavior of the scattering data. In particular, for the exponentially decaying potentials, we devise a simple iterative scheme for computing terms of arbitrary order in the series expansion of ${\mathbf{M}}$ in powers of the wavenumber. The coefficients of this series are determined in terms of a pair of solutions of the zero-energy stationary Schrödinger equation. We introduce a transfer matrix for the latter equation, express it in terms of the time-evolution operator for an effective two-level quantum system, and use it to obtain a perturbative series expansion for the solutions of the zero-energy stationary Schrödinger equation. Our approach allows for identifying the zero-energy resonances for scattering potentials in both full line and half-line with zeros of the entries of the zero-energy transfer matrix of the potential or its trivial extension to the full line.
description: 23 pages
Collecting Genetic Samples in Population Wide (Panel) Surveys: Feasibility, Nonresponse and Selectivity
Creators: name: Schonlau, Matthias
name: Reuter, Martin
name: Schupp, Juergen
name: Montag, Christian
name: Weber, Bernd
name: Dohmen, Thomas
name: Siegel, Nico A.
name: Sunde, Uwe
name: Wagner, Gert G.
name: Falk, Armin
Publisher: name: European Survey Research Association
Year: 2010
Subjects: biomarkers; genetic material; surveys; panel studies; non-response

description: Collecting biomarkers as part of general purpose surveys offers scientists - and social scientists in particular - the ability to study biosocial phenomena, e.g. the relation between genes and human behavior. We explore the feasibility of collecting buccal cells for genetic analyses with normal interviewers as part of a pretest for the German Socio-economic Panel Study (SOEP) using a probability sample. We introduce a new non-invasive technique for collecting cell material for genetic analyses and test its quality. We found no technical difficulties in collecting the genetic material and almost all samples collected could be analyzed. However, one third of interviewers reported it was hard to convince panel members to participate. The "biomarker wave" showed no reduction in response rate compared to the previous wave that included no biomarkers and the sample exhibited very little selectivity. We conclude that collecting cell material for genetic analyses with normal interviewers is feasible with no apparent same-wave attrition, though so far we cannot rule out attrition in subsequent waves.
description: Survey Research Methods, Vol 4, No 2 (2010)
Spin correlations in final-state parton showers and jet observables
Creators: name: Karlberg, Alexander
name: Salam, Gavin P.
name: Scyboz, Ludovic
name: Verheyen, Rob
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: As part of a programme to develop parton showers with controlled logarithmic accuracy, we consider the question of collinear spin correlations within the PanScales family of parton showers. We adapt the well-known Collins-Knowles spin-correlation algorithm to PanScales antenna and dipole showers, using an approach with similarities to that taken by Richardson and Webster. To study the impact of spin correlations, we develop Lund-declustering based observables that are sensitive to spin-correlation effects both within and between jets and extend the MicroJets collinear single-logarithmic resummation code to include spin correlations. Together with a 3-point energy correlation observable proposed recently by Chen, Moult and Zhu, this provides a powerful set of constraints for validating the logarithmic accuracy of our shower results. The new observables and their resummation further open the pathway to phenomenological studies of these important quantum mechanical effects.
description: 30 pages + appendices, 21 figures; v2: matches published version
Measurement and adjustment of non-response bias based on non-response surveys: the case of Belgium and Norway in the European Social Survey Round 3
Creators: name: Matsuo, Hideko
name: Billiet, Jaak
name: Loosveldt, Geert
name: Berglund, Frode
name: Kleven, Øyven
Publisher: name: European Survey Research Association
Year: 2010
Subjects: non-response survey; non-response bias; propensity score weighting; data quality

description: In earlier rounds of the European Social Survey, non-response bias was studied by using population statistics and call record information (para data). In the third round, a new feature was introduced: two kinds of non-respondent surveys were set up using a short list of questions which were designed to study non-response bias. In Belgium, a very short questionnaire was offered to all refusals at the doorstep (doorstep questions survey, DQS). In Norway and two other countries, somewhat longer versions of the basic questionnaire were offered to all main survey non-respondents and to samples of respondents (non-response survey, NRS). Logistic regression models were applied in order to estimate response propensities. This paper shows that propensity score weighting adjustment of non-response bias, on the basis of key socio-demographic and attitudinal variables, is effective for most demographic and non-demographic variables in both Belgium and Norway. Application of the weighting procedure balances the samples of cooperative respondents and non-respondents according to the key variables studied since systematic differences between cooperative respondents and non-respondents have disappeared.
description: Survey Research Methods, Vol 4, No 3 (2010)
Quality in Unimode and Mixed-Mode designs: A Multitrait-Multimethod approach
Creators: name: Revilla, Melanie
Publisher: name: European Survey Research Association
Year: 2010
Subjects: Modes of data collection; concurrent or sequential designs; selection bias

description: So far, most surveys used face-to-face or telephone questionnaires in order to collect data. But the costs of achieving a survey using these traditional modes increase. At the same time, the response rates decrease, making the idea of switching mode very attractive. Because each mode has its own weaknesses and strengths, the idea of mixing modes of data collection is becoming more and more popular. Nevertheless, combining different modes of data collection may be problematic if people answer differently depending on the mode. Also, a switch from a unimode to a mixed-mode design may threaten the comparability of the data across time. This paper focuses first on the selection effect and shows that different kinds of respondents answer in different modes: therefore, mixing modes might make sense since it may improve the representativeness of the sample keeping the costs low. It is still necessary however to guarantee that mixing modes would not threaten the comparability. Then, the paper therefore compares the quality of questions asked in a unimode and two mixed-mode surveys. Using data of the European Social Survey (ESS) in the Netherlands, and following a multitrait-multimethod approach (MTMM), few differences are found between the unimode and mixed-mode designs in terms of quality. Looking at the differences across modes lead to slightly less similarities, but overall the quality does not change much.
description: Survey Research Methods, Vol 4, No 3 (2010)
Cosmological Perturbations in Elastic Dark Energy Models
Creators: name: Battye, Richard A.
name: Moss, Adam
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We discuss the general framework for a perfect continuum medium in cosmology and show that an interesting generalization of the fluids normally used is for the medium to have rigidity and, hence, be analogous to an elastic solid. Such models can provide perfect, adiabatic fluids which are stable even when the pressure is negative, if the rigidity is sufficiently large, making them natural candidates to describe the dark energy. In fact, if the medium is adiabatic and isotropic, they provide the most general description of linearized perturbations. We derive the equations of motion and wave propagation speeds in the isotropic case. We point out that anisotropic models can also be incorporated within the same formalism and that they are classified by the standard Bravais Lattices. We identify the adiabatic and isocurvature modes allowed in both the scalar and vector sectors and discuss the predictions they make for CMB and matter power spectra. We comment on the relationship between these models and other fluid-based approaches to dark energy, and discuss a possible microphysical manifestation of this class of models as a continuum description of defect-dominated scenarios.
description: 29 pages, 12 figures
Collapse of transitional wall turbulence captured using a rare events algorithm
Creators: name: Rolland, Joran
Publisher: name: arXiv
Year: 2021
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: This text presents one of the first successful applications of a rare events method for the study of multistability in a turbulent flow without stochastic energy injection. The trajectories of collapse of turbulence in plane Couette flow, as well as their probability and rate of occurrence are systematically computed using \emph{Adaptive Multilevel Splitting} (AMS). The AMS computations are performed in a system of size $L_x\times L_z=24\times 18$ at Reynolds number $R=370$ with an acceleration by a factor $\mathcal{O}(10)$ with respect to DNS and in a system of size $L_x\times L_z=36\times 27$ at Reynolds number $R=377$ with an acceleration by a factor $\mathcal{O}(10^3)$. The AMS results are validated with a comparison to DNS in the system of size $L_x\times L_z=24\times 18$. Visualisations in both systems indicate that turbulence collapses because the self sustaining process of turbulence fails locally. The streamwise vortices decay first in streamwise elongated holes, leaving streamwise invariant streamwise velocity tubes that experience viscous decay. These holes then extend in the spanwise direction. The examination of more than a thousand of trajectories in the $(E_{c,x}=\int u_x^2/2\,{\rm d}^3\mathbf{x},E_{c,y-z}=\int (u_y^2/2+u_z^2/2)\,{\rm d}^3\mathbf{x})$ plane in the system of size $L_x\times L_z=24\times 18$ confirms the faster decay of streamwise vortices and shows concentration of trajectory. This hints at an instanton phenomenology in the large size limit. The computation of turning point states, beyond which laminarisation is certain, confirms the hole formation scenario and shows that it is more pronounced in larger systems. Finally, the examination of non reactive trajectories, where a hole opens then closes, indicates that hole opening and closing are distinct processes. Both the vortices and the streaks reform concomitantly when the laminar holes close.
description: 32 pages, 16 figures
Analisi dei fattori che influenzano la crescita delle arterie polmonari nei pazienti con cuore funzionalmente univentricolare sottoposti ad anastomosi cavo-polmonare bidirezionale
Analysis of factors influencing pulmonary artery growth after BCPA in patients with single ventricle
Creators: name: Oppido, Guido <1971>
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2015
Subjects: MED/23 Chirurgia cardiaca

description: La BCPA e’ ormai utilizzata routinariamente come stadio intermedio della palliazione di Fontan nel trattamento dei cuori funzionalmente univentricolari e si conferma intervento a ridotta mortalità e morbilità. 
La crescita delle arterie polmonari dopo BCPA è abbastanza variabile ed imprevedibile, le dimensioni indicizzate dei rami principali sembrano tendenzialmente ridotte, tranne quelle dell’arteria lobare inferiore destra, la quale beneficerebbe del flusso preferenziale della BCPA. 
Proprio i pazienti con arterie polmonari più piccole mostrerebbero un maggior incremento di dimensioni delle stesse dopo BPCA.
Il ruolo ed i vantaggi del flusso accessorio nella BCPA sono ancora da definire; tuttavia sembrerebbe offrire vantaggi in termini di crescita delle arterie polmonari, soprattutto il ramo lobare sinistro, e di miglior outcome dopo TCPC.
description: BCPA has been routinely utilized as intermediate step to Fontan operation in patients with functionally single ventricle. After 40 years since its introduction still confirms good results with low complication and mortality rate. Pulmonary arteries growth after BCPA is rather variable and inconstant with a widely reported Nakata-index reduction after some months. Right lower lobe pulmonary index instead increases significantly, possibly due to preferential blood flow after BCPA.
Patients with smaller pulmonary arteries at the beginning seem to benefit of a more effective pulmonary arteries growth.
Accessory source of pulmonary blood flow at the BCPA still bares uncertain efficacy and benefits, even thought it seems to be associated with a better pulmonary artery growth, particularly left lower lobe, and better TCPC results.
Κριτήρια αξιολόγησης φακέλου φαρμάκου από οργανισμούς αξιολόγησης τεχνολογιών υγείας
Creators: name: Σαατσόγλου, Δέσποινα Ανέστη
Publisher: name: Aristotle University of Thessaloniki
Year: 2019
Subjects: Βιομηχανική Φαρμακολογία
Φάκελος φαρμάκου
Οργανισμός αξιολόγησης τεχνολογιών υγείας
Industrial Pharmacology
Medicine
HTA

description: Η έγκριση κυκλοφορίας ενός νέου φαρμάκου στην αγορά υπόκειται σε ένα πλήθος ελεγκτικών μηχανισμών που χρέος έχουν να διασφαλίζουν, μεταξύ άλλων, κοινωνικά αγαθά, όπως η δημόσια υγεία, και η οικονομική ισορροπία στον κρατικό προϋπολογισμό. Παράγοντες που αξιολογούνται είναι η υγειονομική ασφάλεια, τα προστιθέμενα οφέλη στην υγεία σε σχέση με υπάρχοντα σκευάσματα καθώς και οι κρατικοί οικονομικοί πόροι σε σχέση με την παρεχόμενη συνεισφορά εκ μέρους του φαρμάκου στη βελτίωση της υγείας. Σε εθνικό επίπεδο, στις χώρες της Ευρωπαϊκής Ένωσης, το θεσμοθετημένο όργανο αξιολόγησης και εφαρμογής των παραπάνω μηχανισμών είναι ο Οργανισμός Αξιολόγησης Τεχνολογιών Υγείας (ΗΤΑ). Ο οργανισμός αυτός, καταρχήν, αντλεί πληροφορίες που σχετίζονται με το υπό έγκριση φάρμακο από το θεσμοθετημένο αρμόδιο όργανο της Ευρωπαϊκής Ένωσης, τον Ευρωπαϊκό Οργανισμό Φαρμάκων (ΕΜΑ). Αυτός με τη σειρά του μαζί με τα αντίστοιχα όργανα των εκτός Ευρωπαϊκής Ένωσης χωρών καθώς και εκπροσώπους της φαρμακοβιομηχανίας μετέχει στη Διεθνή Διάσκεψη Εναρμόνισης από όπου εκδίδονται οι κατευθυντήριες οδηγίες σχετικά με την αξιολόγηση νέων ιατρικών τεχνολογιών και φαρμάκων. Έχοντας, λοιπόν, μια ευρεία βάση δεδομένων στη διάθεσή του, ο ΗΤΑ αναλαμβάνει να συνοψίσει τις πληροφορίες προκειμένου να αποφανθεί για την έγκριση και έκδοση της άδειας κυκλοφορίας του νέου φαρμάκου καθώς και να καθορίσει την τιμή του και το ποσοστό αποζημίωσης από τα ασφαλιστικά ταμεία.
description: Market authorization for a new medicine is subject to approval through a number of control mechanisms which aim to secure, amongst others, social welfare related to public healthcare, and financial balance in state expenditure. Several related factors are evaluated, such as public health safety, added medical and pharmaceutical benefits in relation to existing medicines as well as cost-effectiveness as balanced against the state financial resources. At national level, within the European Union, the statutory body which carries out the evaluation and application of the above mentioned mechanisms is the national Health Technology Assessment organization (HTA). To begin with, HTA collects information related to the -subject to approval- medicine from the European Union’s statutory body, namely the European Medicines Agency (EMA). The latter, along with the respective bodies from countries outside the European Union as well as representatives from the pharmaceutical industry, is a member of the International Conference of Harmonization (ICH), where guidelines on assessment of new medical technologies and medicines are composed. Therefore, having a wide data base available, HTA aims to summarize the information provided in order to reach a decision of approval and grant market authorization as well as determine its price and reimbursement from the state subsidized healthcare providers.
B- to light-meson transition form factors
Creators: name: Ivanov, Mikhail A.
name: Korner, Jurgen G.
name: Kovalenko, Sergey G.
name: Roberts, Craig D.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Nuclear Theory (nucl-th)
subject: High Energy Physics - Experiment (hep-ex)
subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We report a comprehensive set of results for B-meson heavy-to-light transition form factors calculated using a truncation of, and expression for, the transition amplitudes in which all elements are motivated by the study of Dyson-Schwinger equations in QCD. In this relativistic approach, which realises confinement and dynamical chiral symmetry breaking, all physical values of momentum transfer in the transition form factors are simultaneously accessible. Our results can be useful in the analysis and correlation of the large body of data being accumulated at extant facilities, and thereby in probing the Standard Model and beyond.
description: 12 pages, 5 figures, 4 tables. References and additional discussion added, including heavy-quark limit
OGLE 2004-BLG-254: a K3 III Galactic Bulge Giant spatially resolved by a single microlens
Creators: name: Cassan, A.
name: Beaulieu, J. -P.
name: Fouque, P.
name: Brillant, S.
name: Dominik, M.
name: Greenhill, J.
name: Heyrovsky, D.
name: Horne, K.
name: Jorgensen, U. G.
name: Kubas, D.
name: Stempels, H. C.
name: Vinter, C.
name: Albrow, M. D.
name: Bennett, D.
name: Caldwell, J. A. R.
name: Calitz, J. J.
name: Cook, K.
name: Coutures, C.
name: Dominis, D.
name: Donatowicz, J.
name: Hill, K.
name: Hoffman, M.
name: Kane, S.
name: Marquette, J. -B.
name: Martin, R.
name: Meintjes, P.
name: Menzies, J.
name: Miller, V. R.
name: Pollard, K. R.
name: Sahu, K. C.
name: Wambsganss, J.
name: Williams, A.
name: Udalski, A.
name: Szymanski, M. K.
name: Kubiak, M.
name: Pietrzynski, G.
name: Soszynski, I.
name: Zebrun, K.
name: Szewczyk, O.
name: Wyrzykowski, L.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present an analysis of OGLE 2004-BLG-254, a high-magnification and relatively short duration microlensing event in which the source star, a Bulge K3-giant, has been spatially resolved by a point-like lens. We have obtained dense photometric coverage of the event light curve with OGLE and PLANET telescopes, as well as a high signal-to-noise ratio spectrum taken while the source was still magnified by 20, using the UVES/VLT spectrograph. Our dense coverage of this event allows us to measure limb darkening of the source star in the I and R bands. We also compare previous measurements of linear limb-darkening coefficients involving GK-giant stars with predictions from ATLAS atmosphere models. We discuss the case of K-giants and find a disagreement between limb-darkening measurements and model predictions, which may be caused by the inadequacy of the linear limb-darkening law.
description: 14 pages, 8 figures, accepted for publication in A&A (04/09/2006)
Small craft motion in reflected long-crested seas
Creators: name: Kennedy, Andrew B.
Publisher: name: University of British Columbia
Year: 2008

description: This thesis attempts to provide an analysis of several aspects of moored small craft motion, concentrating on vessel response to wave action and wave reflection, and briefly examining the effects of irregular waves. Experiments were performed in the National Research Council multidirectional wave basin in Ottawa to determine the response of a moored small craft model in long-crested waves. The SELSPOT imaging system was used to measure vessel motions. With several exceptions, model response was found to be highly linear. The most notable of these exceptions were the resonance peak in surge, and all yaw motions. The modes of sway and roll also exhibited nonlinearities but, surprisingly, these were fairly A numerical program was undertaken to attempt to correlate and extend the results of the experiments. Linear diffraction theory as represented by the programs FACGEN3 and WELSAS3 was used to calculate vessel movements for various wave periods, incident angles and mooring conditions. Various perturbations were made towboat properties to find the sensitivity of response. Response in head seas generally agreed with experimental results with the notable exception of the surge resonance peak, which was predicted to be much too high. However, the addition of an extra 5%damping lowered this peak to experimental levels without substantially affecting another modes of motion. Response in beam seas was not as well predicted. For both sway and roll, long wavelength response was predicted to be much too low. This was thought to be due to poor representation of the boat hull by Green's functions and neglect of viscous effects. Calculations performed with a widened hull showed better agreement with experiment. Expressions were developed to relate vessel motion in a partially reflected and unreflected wave field and were found to agree well with experiment. The effect of irregular waves on wave criteria developed for monochromatic waves was also considered. For both cases, recommendations were made toward extending existing wave criteria in these directions.
Adiabatic analysis of the rotating BTZ black hole
Creators: name: Fathi, Mohsen
name: Lepe, Samuel
name: Villanueva, J. R.
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: In this paper we analyze some interesting features of the thermodynamics of the rotating BTZ black hole from the Carathéodory axiomatic postulate, for which, we exploit the appropriate Pfaffian form. The allowed adiabatic transformations are then obtained by solving the corresponding Cauchy problem, and are studied accordingly. Furthermore, we discuss the implications of our approach, regarding the the second and third laws of black hole thermodynamics. In particular, the merging of two extremal black holes is studied in detail.
description: Accepted version
Figure S1: PTR-TOF-MS needle plunge schematic from The genetic architecture of sexual dimorphism in the moss ceratodon purpureus
Creators: name: Kollar, Leslie M.
name: Kiel, Scott
name: James, Ashley J.
name: Carnley, Cody T.
name: Scola, Danielle N.
name: Clark, Taylor N.
name: Tikahari Khanal
name: Rosenstiel, Todd N.
name: Gall, Elliott T.
name: Grieshop, Karl
name: McDaniel, Stuart F.
Publisher: name: The Royal Society
Year: 2021
Subjects: subject: Genetics
subject: FOS: Biological sciences
subject: Plant Biology

description: Schematic for PTR-TOF-MS volatile collection.
Perdite aeree prolungate dopo resezione polmonare
Prolonged air leak after pulmonary resection
Creators: name: Micali, Vincenzo <1978>
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2015
Subjects: MED/21 Chirurgia toracica

description: Il tumore del polmone e una delle neoplasie più diagnosticate dal 1985 e rimane ancora oggi la causa più frequente di morte cancro-correlata nel mondo. Una resezione polmonare anatomica completa continua ad essere il cardine della terapia per il tumore non a piccole cellule.
Perdite aeree prolungate (PAL) sono la più comune complicanza dopo una chirurgia polmonare e sono state riportate con un’incidenza compresa tra il 3-26%, simile sia nelle resezioni polmonari per via toracotomica sia in quelle per via toracoscopica.
Fattori di rischio descritti sono scissure interlobari incomplete, patologie polmonari sottostanti (come enfisema, fibrosi, tubercolosi o neoplasie), aderenze pleuriche,
pazienti anziani (>75 anni) e bassa capacita di diffusione.
Lo sviluppo di strumentazione all’avanguardia e di nuove tecniche chirurgiche ha contribuito a ridurre l’incidenza di queste complicanze.
Considerando l’alto impatto clinico e socio-economico di queste problematiche, e stata inoltre sviluppata una varietà di complementari naturali e materiali sintetici molti utili nella gestione delle perdite aeree.
description: Lung cancer is one of the most diagnosed cancer in 1985 and still remains the most common cause of cancer-related death in the world. A full anatomical lung resection remains the mainstay of therapy for non-small cell cancer.
 Prolonged air leak (PAL) are the most common complication following a lung surgery and were reported with an incidence of between 3-26%, similar in both pulmonary resection by thoracotomy and in those thoracoscopic.
Risk factors described are incomplete interlobar fissures, lung diseases underlying (such as emphysema, fibrosis, tuberculosis or malignancy), pleural adhesions, elderly patients (> 75 years) and low capacity to spread.
The development of modern equipment and new surgical techniques has helped to reduce the incidence of these complications.
Considering the high clinical impact and socio-economic problems of these, and was also developed a variety of complementary natural and synthetic materials useful in the management of many air leak.
Alleviation of the Fermion-sign problem by optimization of many-body wave functions
Creators: name: Umrigar, C. J.
name: Toulouse, Julien
name: Filippi, Claudia
name: Sorella, S.
name: Hennig, R. G.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We present a simple, robust and highly efficient method for optimizing all parameters of many-body wave functions in quantum Monte Carlo calculations, applicable to continuum systems and lattice models. Based on a strong zero-variance principle, diagonalization of the Hamiltonian matrix in the space spanned by the wav e function and its derivatives determines the optimal parameters. It systematically reduces the fixed-node error, as demonstrated by the calculation of the binding energy of the small but challenging C$_2$ molecule to the experimental accuracy of 0.02 eV.
Excitation transfer in two two-level systems coupled to an oscillator
Creators: name: Hagelstein, Peter L.
name: Chaudhary, Irfan U.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We consider a generalization of the spin-boson model in which two different two-level systems are coupled to an oscillator, under conditions where the oscillator energy is much less than the two-level system energies, and where the oscillator is highly excited. We find that the two-level system transition energy is shifted, producing a Bloch-Siegert shift in each two-level system similar to what would be obtained if the other were absent. At resonances associated with energy exchange between a two-level system and the oscillator, the level splitting is about the same as would be obtained in the spin-boson model at a Bloch-Siegert resonance. However, there occur resonances associated with the transfer of excitation between one two-level system and the other, an effect not present in the spin-boson model. We use a unitary transformation leading to a rotated system in which terms responsible for the shift and splittings can be identified. The level splittings at the anticrossings associated with both energy exchange and excitation transfer resonances are accounted for with simple two-state models and degenerate perturbation theory using operators that appear in the rotated Hamiltonian.
description: 26 pages, 4 figures
Pseudofree Z/3-actions on K3 surfaces
Creators: name: Liu, Ximin
name: Nakamura, Nobuhiro
Publisher: name: arXiv
Year: 2006
Subjects: subject: Geometric Topology (math.GT)
subject: FOS: Mathematics
subject: Primary: 57S17. Secondary: 57S25, 57M60, 57R57

description: In this paper, we give a weak classification of locally linear pseudofree actions of the cyclic group of order 3 on a $K3$ surface, and prove the existence of such an action which can not be realized as a smooth action on the standard smooth $K3$ surface.
description: 8 pages
Figure S2: Eigentensor analysis from The genetic architecture of sexual dimorphism in the moss ceratodon purpureus
Creators: name: Kollar, Leslie M.
name: Kiel, Scott
name: James, Ashley J.
name: Carnley, Cody T.
name: Scola, Danielle N.
name: Clark, Taylor N.
name: Tikahari Khanal
name: Rosenstiel, Todd N.
name: Gall, Elliott T.
name: Grieshop, Karl
name: McDaniel, Stuart F.
Publisher: name: The Royal Society
Year: 2021
Subjects: subject: Genetics
subject: FOS: Biological sciences
subject: Plant Biology

description: Formal eigentensor analysis comparing male and female covariance matrices.
Fast and High-Quality Blind Multi-Spectral Image Pansharpening
Creators: name: Yu, Lantao
name: Liu, Dehong
name: Mansour, Hassan
name: Boufounos, Petros T.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Blind pansharpening addresses the problem of generating a high spatial-resolution multi-spectral (HRMS) image given a low spatial-resolution multi-spectral (LRMS) image with the guidance of its associated spatially misaligned high spatial-resolution panchromatic (PAN) image without parametric side information. In this paper, we propose a fast approach to blind pansharpening and achieve state-of-the-art image reconstruction quality. Typical blind pansharpening algorithms are often computationally intensive since the blur kernel and the target HRMS image are often computed using iterative solvers and in an alternating fashion. To achieve fast blind pansharpening, we decouple the solution of the blur kernel and of the HRMS image. First, we estimate the blur kernel by computing the kernel coefficients with minimum total generalized variation that blur a downsampled version of the PAN image to approximate a linear combination of the LRMS image channels. Then, we estimate each channel of the HRMS image using local Laplacian prior to regularize the relationship between each HRMS channel and the PAN image. Solving the HRMS image is accelerated by both parallelizing across the channels and by fast numerical algorithms for each channel. Due to the fast scheme and the powerful priors we used on the blur kernel coefficients (total generalized variation) and on the cross-channel relationship (local Laplacian prior), numerical experiments demonstrate that our algorithm outperforms state-of-the-art model-based counterparts in terms of both computational time and reconstruction quality of the HRMS images.
description: 17 pages, 47 figures, journal, accepted by IEEE Transactions on Geoscience and Remote Sensing
Το ξίφος στον αρχαίο ελληνικό κόσμο. Η χρήση και η σημασία του εκτός μάχης κατά την αρχαϊκή και κλασική εποχή
Creators: name: Τότσιος, Κωνσταντίνος Ηλία
Publisher: name: Aristotle University of Thessaloniki
Year: 2019
Subjects: Κλασική Αρχαιολογία
Ξίφος
Αρχαϊκή και Κλασική Εποχή
Classical Archaeology
Sword
Archaic and Classical era

description: Αντικείμενο της παρούσας μεταπτυχιακής εργασίας είναι η μελέτη του ξίφους στον αρχαίο ελληνικό κόσμο κατά την αρχαϊκή και κλασική εποχή, εξετάζοντας κυρίως τις οποιεσδήποτε λειτουργίες και τη σημασία που αυτό είχε εκτός μάχης. Αρχικά, παρουσιάστηκε η τυπολογία των ξιφών όπως αυτή διαμορφώθηκε για τις ανάγκες της εργασίας. Στη συνέχεια εξετάστηκαν με λεπτομέρεια τα ξίφη που έχουν βρεθεί ανατεθημένα στα ιερά του αρχαίου ελληνικού κόσμου, παραθέτοντας παράλληλα διάφορες επιγραφικές μαρτυρίες και αρχαίες φιλολογικές πηγές με σχετικές αναφορές σε αναθέσεις ξιφών. Ακόμη, παρουσιάστηκαν με λεπτομέρεια τα ξίφη που χρησιμοποιήθηκαν ως κτερίσματα σε ταφές. Ένα ακόμη θέμα που θίχτηκε ήταν η χρήση του ξίφους σε χορευτικά δρώμενα, εξετάζοντας κυρίως μαρτυρίες από την αρχαία ελληνική γραμματεία και απεικονίσεις στην αγγειογραφία της εποχής. Τέλος, παρουσιάζονται τα πρωτότυπα πορίσματα της μελέτης, τα οποία συνοδεύουν πίνακες στους οποίους καταγράφονται αναλυτικά τα αρχαιολογικά δεδομένα που έχουν συγκεντρωθεί
description: The subject of the present Master Thesis was the study of the sword in the ancient Greek world, regarding its use and significance in non-battle context during the Archaic and Classical era. Firstly, we examined the typology of swords, which was shaped to serve the purposes of this thesis. Then, we presented with great detail all the known swords that were found as votive offerings in the sanctuaries of the Greek World, while examining a variety of inscriptions and ancient Greek texts related to votive swords. Furthermore, we proceeded to an in-depth examination of the swords found as grave gifts, accompanying the dead. Last but not least, we examined the use of swords in events relevant to dancing, such as sword-dancing and acrobatics, mainly studying the written sources of the time and the artistic depictions of such events in pottery. Conclusions extracted by all the above, are presented in the last pages of the study, followed by detailed tables containing the archaeological data that was accumulated
Children’s Reports of Parents’ Education Level: Does it Matter Whom You Ask and What You Ask About?
Creators: name: Kreuter, Frauke
name: Eckman, Stephanie
name: Maaz, Kai
name: Watermann, Rainer
Publisher: name: European Survey Research Association
Year: 2010
Subjects: surveys of children;education scores; SES

description: Education researchers who study the effect of family social background on student achievement often use students’ survey reports of parental education to investigate these effects. However, past research has demonstrated that students misreport their parents’ education levels. We expand upon this research in two ways. First we use cognitive theories about the response process to develop and test hypotheses about reporting inconsistencies across these variables. Second we evaluate the impact of student misreporting on estimates of the relationship between parental education levels and student math achievement. Using data from the German administration of PISA 2000 (OECD Programme for International Student Assessment) in which both students and parents were asked to report parental variables, we show that reporting inconsistencies are a function of student achievement: students with higher math scores tend to provide reports that are more consistent with their parents' reports. This interesting case of differential measurement error has consequences for comparisons of the effects of parental background on student achievement across different subgroups of the population and across countries (a common use of PISA data and other international studies similar to PISA).
description: Survey Research Methods, Vol 4, No 3 (2010)
A high-significance detection of non-Gaussianity in the WMAP 3-year data using directional spherical wavelets
Creators: name: McEwen, J. D.
name: Hobson, M. P.
name: Lasenby, A. N.
name: Mortlock, D. J.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We repeat the directional spherical real Morlet wavelet analysis used to detect non-Gaussianity in the WMAP 1-year data (McEwen et al. 2005a), on the WMAP 3-year data. The non-Gaussian signal previously detected is indeed present in the 3-year data, although the significance of the detection is reduced. Using our most conservative method for constructing significance measures, we find the significance of the detection of non-Gaussianity drops from 98.3+/-0.4% to 94.9+/-0.7%; the significance drops from 99.3+/-0.3% to 97.2+/-0.5% using a method based on the $χ^2$ statistic. The wavelet analysis allows us to localise most likely sources of non-Gaussianity on the sky. We detect very similar localised regions in the WMAP 1-year and 3-year data, although the regions extracted appear more pronounced in the 3-year data. When all localised regions are excluded from the analysis the 3-year data is consistent with Gaussianity.
description: 5 pages, 5 figures; typographical changes to match version accepted by MNRAS
Discussion of informed consent documents
Creators: name: Parker, Verdena
name: Campbell, Amy
name: Spence, Justin
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2021
Subjects: subject: hup

description: Audio files VP-190408-01a/c: Discussion of informed consent documents for the Hupa Language Documentation Project (protocol #2007-11-45 approved by UC Berkeley's Committee for the Protection of Human Subjects).
Table S1: Significance of genetic variation for each trait from The genetic architecture of sexual dimorphism in the moss ceratodon purpureus
Creators: name: Kollar, Leslie M.
name: Kiel, Scott
name: James, Ashley J.
name: Carnley, Cody T.
name: Scola, Danielle N.
name: Clark, Taylor N.
name: Tikahari Khanal
name: Rosenstiel, Todd N.
name: Gall, Elliott T.
name: Grieshop, Karl
name: McDaniel, Stuart F.
Publisher: name: The Royal Society
Year: 2021
Subjects: subject: Genetics
subject: FOS: Biological sciences
subject: Plant Biology

description: Univariate model comparisons used for detecting genetic variance for eat trait.
Revisit the Chiral Magnetic Effect Expectation in Isobaric Collisions at the Relativistic Heavy Ion Collider
Creators: name: Feng, Yicheng
name: Lin, Yufu
name: Zhao, Jie
name: Wang, Fuqiang
Publisher: name: arXiv
Year: 2021
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Isobaric $^{96}_{44}$Ru+$^{96}_{44}$Ru and $^{96}_{40}$Zr+$^{96}_{40}$Zr collisions at $\sqrt{s_{_{NN}}}=200$ GeV have been conducted at the Relativistic Heavy Ion Collider to circumvent the large flow-induced background in searching for the chiral magnetic effect (CME), predicted by the topological feature of quantum chromodynamics (QCD). Considering that the background in isobar collisions is approximately twice that in Au+Au collisions (due to the smaller multiplicity) and the CME signal is approximately half (due to the weaker magnetic field), we caution that the CME may not be detectable with the collected isobar data statistics, within $\sim$2$σ$ significance, if the axial charge per entropy density ($n_5/s$) and the QCD vacuum transition probability are system independent. This expectation is generally verified by the Anomalous-Viscous Fluid Dynamics (AVFD) model. While our estimate provides an approximate "experimental" baseline, theoretical uncertainties on the CME remain large.
description: 6 pages, 1 multi-panel figure. v2: version after addressing referee comments. Corrected a factor 2 error in the quoted multiplicity; corrected a factor 2 error in the A-dependence exponent of the magnetic field; conclusions unchanged. v3: match published version
Frequency Shift Algorithm: Application to a Frequency-Domain Multiplexing Readout of X-ray Transition-Edge Sensor Microcalorimeters
Creators: name: Vaccaro, D.
name: Akamatsu, H.
name: van der Kuur, J.
name: van der Hulst, P.
name: Nieuwenhuizen, A. C. T.
name: van Winden, P.
name: Gottardi, L.
name: Hartog, R. den
name: Bruijn, M. P.
name: D'Andrea, M.
name: Gao, J. R.
name: Herder, J. W. A. den
name: Hoogeveen, R. W. M.
name: Jackson, B.
name: van der Linden, A. J.
name: Nagayoshi, K.
name: Ravensberg, K.
name: Ridder, M. L.
name: Taralli, E.
name: de Wit, M.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: In the frequency-domain multiplexing (FDM) scheme, transition-edge sensors (TES) are individually coupled to superconducting LC filters and AC biased at MHz frequencies through a common readout line. To make efficient use of the available readout bandwidth and to minimize the effect of non-linearities, the LC resonators are usually designed to be on a regular grid. The lithographic processes however pose a limit on the accuracy of the effective filter resonance frequencies. Off-resonance bias carriers could be used to suppress the impact of intermodulation distortions, which nonetheless would significantly affect the effective bias circuit and the detector spectral performance. In this paper we present a frequency shift algorithm (FSA) to allow off-resonance readout of TES's while preserving the on-resonance bias circuit and spectral performance, demonstrating its application to the FDM readout of a X-ray TES microcalorimeter array. We discuss the benefits in terms of mitigation of the impact of intermodulation distortions at the cost of increased bias voltage and the scalability of the algorithm to multi-pixel FDM readout. We show that with FSA, in multi-pixel and frequencies shifted on-grid, the line noises due to intermodulation distortion are placed away from the sensitive region in the TES response and the X-ray performance is consistent with the single-pixel, on-resonance level.
description: Accepted for publication on Review of Scientific Instruments
Elaborate Item Count Questioning: Why Do People Underreport in Item Count Responses?
Creators: name: Tsuchiya, Takahiro
name: Hirai, Yoko
Publisher: name: European Survey Research Association
Year: 2010
Subjects: indirect questioning technique; item count technique; underreporting effect; order effect; check-all-that-apply

description: The item count technique, used often to investigate illegal or socially undesirable behaviours, requires respondents to indicate merely the number of applicable items from among a list.  However, the number of applicable items indicated via the item count question tends to be smaller than when it is calculated from the direct `applies/does not apply' responses to each item.  Because this inconsistency, which we refer to as the underreporting effect, often disturbs proper item count estimates, the causes of this effect are explored in this paper.  Web survey results revealed that the order of the response alternatives is irrelevant to the underreporting effect, and that the underreporting effect is caused by the response format in which the item count question requests merely the number of applicable items and not the number of non-applicable items.  It is also shown that the magnitude of the underreporting effect decreases when the respondents are asked to indicate the numbers of both applicable and non-applicable items, which we refer to as elaborate item count questioning.
description: Survey Research Methods, Vol 4, No 3 (2010)
Personalisation in advance letters does not always increase response rates. Demographic correlates in a large scale experiment
Creators: name: Luiten, Annemieke
Publisher: name: European Survey Research Association
Year: 2011
Subjects: advance letter; personalisation; response; cooperation; subgroups

description: This study was set up to examine whether personalising advance letters by adding names and appropriate salutation, affects the survey cooperation of subgroups in the general population differently, in analogy to findings that subgroups react differently to advance letters. Differential reactions could be an explanation for the mixed findings in the literature on personalisation of advance or cover letters. In a large scale study (N=39,518), information in communal registries was used to study (non)response patterns in subgroups, as a result of personalisation. Advance letters of the Dutch CAPI Labour Force Survey were randomly assigned to addresses. In the non-personalised version (N=30,899), letters were addressed to ‘the inhabitants of…’. In the personalised version (N=8,619), the name or names of the household core were derived from municipal registries and used for addressing the letter. A re-interview addressed the issue whether the advance letter was read by more households when the household was addressed by name. By linking the sample to registries, it was possible to study response behaviour of subgroups. The study focussed on groups the literature indicates as differentially reacting to advance letters, i.e., different age, ethnic, gender, household composition and income groups, and groups with or without a listed telephone number.	
Hardly any difference in the overall level of cooperation was found if either a personalised or non-personalised letter was used. However, differential reactions were found for listed versus unlisted telephone owners, where only listed households reacted positively to personalisation. In the other subgroups studied, no firm evidence of differential reactions were found. The paper discusses what these results signify for sample composition and the risk of bias.
description: Survey Research Methods, Vol 5, No 1 (2011)
Interleaved Electro-Optic Dual Comb Generation to Expand Bandwidth and Scan Rate for Molecular Spectroscopy and Dynamics Studies near 1.6 μm
Creators: name: Stroud, Jasper R.
name: Simon, James B.
name: Wagner, Gerd A.
name: Plusquellic, David F.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Optics (physics.optics)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: A chirped-pulse interleaving method is reported for generation of dual optical frequency combs based on electro-optic phase modulators (EOM) in a free-running all-fiber based system. Methods are discussed to easily modify the linear chirp rate and comb resolution by more than three orders of magnitude and to significantly increase the spectral bandwidth coverage. The agility of the technique is shown to both capture complex line shapes and to magnify rapid passage effects in spectroscopic and molecular dynamics studies of CO2. These methods are well-suited for applications in the areas of remote sensing, reaction dynamics, and sub-Doppler studies across the wide spectral regions accessible to EOMs.
Properties of solar polar coronal plumes constrained by Ultraviolet Coronagraph Spectrometer data
Creators: name: Raouafi, N. -E.
name: Harvey, J. W.
name: Solanki, S. K.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We investigate the plasma dynamics (outflow speed and turbulence) inside polar plumes. We compare line profiles (mainly of \ion{O}{6}) observed by the UVCS instrument on SOHO at the minimum of solar cycle 22-23 with model calculations. We consider Maxwellian velocity distributions with different widths in plume and inter-plume regions. Electron densities are assumed to be enhanced in plumes and to approach inter-plume values with increasing height. Different combinations of the outflow and turbulence velocity in the plume regions are considered. We compute line profiles and total intensities of the \ion{H}{1} Ly$α$ and the \ion{O}{6} doublets. The observed profile shapes and intensities are reproduced best by a small solar wind speed at low altitudes in plumes that increases with height to reach ambient inter-plume values above roughly 3-4 $R_\sun$ combined with a similar variation of the width of the velocity distribution of the scattering atoms/ions. We also find that plumes very close to the pole give narrow profiles at heights above 2.5 $R_\sun$, which are not observed. This suggests a tendency for plumes to be located away from the pole. We find that the inclusion of plumes in the model computations provides an improved correspondence with the observations and confirms previous results showing that published UVCS observations in polar coronal holes can be roughly reproduced without the need for large temperature anisotropy. The latitude distributions of plumes and magnetic flux distributions are studied by analyzing data from different instruments on SOHO and with SOLIS.
description: 11 figures