cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Stellar Evolution and Variability in the Pre-ZAHB Phase
Creators: name: Aguirre, V. Silva
name: Catelan, M.
name: Weiss, A.
name: Valcarce, A. A. R.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: One of the most dramatic events in the life of a low-mass star is the He flash, which takes place at the tip of the RGB and is followed by a series of secondary flashes before the star settles on the zero-age HB (ZAHB). Yet, no stars have ever been positively identified in this key phase in the life of a low-mass star (hereafter the "pre-ZAHB" phase). We investigate the possibility that some pre-ZAHB stars may cross the instability strip (IS), thus becoming variable. In particular, it has been suggested that some RR Lyrae stars (RRL) with high period change rates (P-dot) may in fact be pre-ZAHB stars. We present the first theoretical effort devoted to interpreting some of the high-P-dot stars as pre-ZAHB pulsators. We constructed a grid of evolutionary tracks using the Garching Stellar Evolution Code for a chemical composition appropriate to the case of the globular cluster M3, where a number of stars with high P-dot values are found. We follow each star's pre-ZAHB evolution in detail, compute periods and P-dot values for the stars lying inside the IS, and produce pre-ZAHB Monte Carlo simulations for the case of M3. Our results indicate that one should expect of order 1 pre-ZAHB star for every 60 or so bona-fide HB stars in M3. Among the pre-ZAHB stars, ~22% are expected to fall within the IS boundaries, presenting RRL-like pulsations. On average, the pre-ZAHB pulsators are expected to have longer periods than the bona-fide HB pulsators, and 76% of them are predicted to show negative P-dot values. The most likely P-dot value for the pre-ZAHB variables is ~-0.3 d/Myr, but more extreme P-dot values are also possible: 38% of the variables are predicted to have P-dot < -0.8 d/Myr. It appears likely, therefore, that some RRL stars in M3 with high (absolute) P-dot values are pre-ZAHB pulsators in disguise. (abridged)
description: 8 pages, 8 figures. A&A, in press
Comment on: "Geometric phase of neutrinos: differences between Dirac and Majorana neutrinos" [Phys. Lett. B 780, 216 (2018)]
Creators: name: Lu, Jianlong
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: In [Phys. Lett. B 780, 216 (2018)], Capolupo et al. calculate the noncyclic geometric phases associated with neutrino flavor transitions in the two-neutrino scenario, and claim that the results depend on the choice of representations of neutrino mixing matrix thus can be use to distinguish between Dirac and Majorana neutrinos. In this paper, we show that their calculation is flawed due to incorrect application of the definition of noncyclic geometric phase and the omission of one term in Wolfenstein effective Hamiltonian. Their results are neither gauge invariant nor lepton field rephasing invariant. We present an alternative calculation, which is solely in order to demonstrate that the Majorana CP-violating phase enters the geometric phase essentially by lepton field rephasing transformation. We point out that the seemingly nontrivial dependence of geometric phase on Majorana CP-violating phase presented in [Phys. Lett. B 780, 216 (2018)] is unphysical and thus unmeasurable.
description: 9 pages, to appear in Physics Letters B, submitted on 19 March 2021, accepted on 17 May 2021
Nonstandard limit theorem for infinite variance functionals
Creators: name: Sly, Allan
name: Heyde, Chris
Publisher: name: arXiv
Year: 2008
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics
subject: 60G15, 60G17, 60G18 (Primary)

description: We consider functionals of long-range dependent Gaussian sequences with infinite variance and obtain nonstandard limit theorems. When the long-range dependence is strong enough, the limit is a Hermite process, while for weaker long-range dependence, the limit is $α$-stable Lévy motion. For the critical value of the long-range dependence parameter, the limit is a sum of a Hermite process and $α$-stable Lévy motion.
description: Published in at http://dx.doi.org/10.1214/07-AOP345 the Annals of Probability (http://www.imstat.org/aop/) by the Institute of Mathematical Statistics (http://www.imstat.org)
Considerações sobre o projeto de alargamento da Av. da Serra do Vale do Jordão, baseado no contexto histórico-geológico e ambiental, do Município de Guarapuava (Paraná, Brasil)
Creators: name: Samuel Felipe Bueno Steimbach
Publisher: name: Zenodo
Year: 2023

description: R E S U M ODentre as intervenções para o desenvolvimento urbano, o alargamento de avenidas se destaca como uma medida para melhorar a mobilidade urbana, atender à crescente demanda de tráfego e proporcionar maior segurança para os ciclistas. No entanto, tais projetos podem gerar impactos significativos ao meio ambiente, afetando ecossistemas naturais e serviços ecossistêmicos. Esta pesquisa, inclui uma análise geomorfológica e litológica da região, com ênfase nas implicações do passado geológico, destacando estruturas circulares ou paleocaldeiras. Que através desta investigação bibliográfica e da paisagem, foram identificados os principais processos hidrogeológicos que ocorrem na região, resultante da atividade vulcânica e tectônica. Permitiu-se a partir disso, identificar áreas sensíveis que requerem medidas de mitigação, como a preservação de áreas de recarga de aquíferos, a implementação de práticas de drenagem sustentável e o manejo adequado do solo durante as obras do projeto de alargamento da Avenida Vereador Rubens Siqueira Ribas, no Vale do Jordão em Guarapuava (Paraná, Brasil). Tais considerações são fundamentais para promover o desenvolvimento urbano de forma sustentável, onde os resultados deste estudo fornecem subsídios importantes para tomadas de decisão mais responsáveis e equilibradas em projetos futuros nesse contexto.Palavras-Chaves: Desenvolvimento Sustentável, Geologia, Impactos Ambientais.
Yu-Shiba-Rusinov multiplets and clusters of multiorbital adatoms in superconducting substrates: Subgap Green's function approach
Creators: name: Arrachea, Liliana
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We discuss all the characteristics of Yu-Shiba-Rusinov states for clusters of impurities with classical magnetic moments in a superconducting substrate with s-wave symmetry. We consider the effect of the multiorbital structure of the impurities and the effect of the crystal field splitting. We solve the problem exactly and calculate the subgap Green's function, which has poles at the energies of the Shiba states and defines the local density of states associated to their wave functions. For the case of impurities sufficiently separated, we derive an effective Hamiltonian to describe the hybridization mediated by the substrate. We analyze the main features of the spectrum and the spectral density of the subgap excitations for impurities in dimer configurations with different relative orientations of the magnetic moments. We also illustrate how the same formalism applies for the solution of a trimer with frustration in the orientation of the magnetic moments.
description: 16 figures
The redshift-dependence of gamma-ray absorption in the environments of strong-line AGN
Creators: name: Reimer, A.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The case of gamma-ray absorption due to photon-photon pair production of jet photons in the external photon environment like accretion disk and broad-line region radiation field of gamma-ray loud active galactic nuclei (AGN) that exhibit strong emission lines is considered. I demonstrate that this ''local opacity'', if detected, will almost unavoidably be redshift-dependent in the sub-TeV range. This introduces non-negligible biases, and complicates approaches for studying the evolution of the extragalactic background light with contemporary GeV instruments like e.g. the Gamma-ray Large Area Space Telescope (GLAST), etc., where the gamma-ray horizon is probed by means of statistical analysis of absorption features (e.g. Fazio-Stecker relation, etc.) in AGN spectra at various redshifts. It particularly applies to strong-line quasars where external photon fields are potentially involved in gamma-ray production.
description: 19 pages, 5 figures; accepted for publication in ApJ
Visual Navigation with a 2-pixel Camera---Possibilities and Limitations
Creators: name: Baillieul, John
name: Kang, Feiyang
Publisher: name: arXiv
Year: 2021
Subjects: subject: Systems and Control (eess.SY)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Borrowing terminology from fluid mechanics, the concepts of {\em Eulerian} and {\em Lagrangian optical flow sensing} are introduced. Eulerian optical flow sensing assumes that each photoreceptor in the camera or eye can instantaneously detect feature image points and their velocities on the retina. If this assumption is satisfied, even a two pixel imaging system can provide a moving agent with information about its movement along a corridor that is sufficiently precise as to be used as a robustly reliable steering signal. Implementing Eulerian optical flow sensing poses significant challenges, however. Lagrangian optical flow, on the other hand, tracks feature image points as they move on the retina. This form of visual sensing is the basis for many standard computer vision implementations, including Lukas-Kanade and Horn-Schunck. Lagrangian optical flow has its own challenges, not least of which is that it is badly confounded by rotational components of motion. Combined steering and sensing strategies for mitigating the effects of rotational motions are considered.
description: 8 pages, 2 figures
title: Bilingualism represented in How to tame a wild tongue by Gloria Anzaldúa
Creators: name: Soares, Donzília
Publisher: name: CETAPS, Faculdade de Ciências Sociais e Humanas, Universidade NOVA de Lisboa
Year: 2020

description: This study aimed to analyse Gloria Anzaldúa’s identity representation through her writing in How to Tame a Wild Tongue (Anzaldúa, 1987), where she uses English and Spanish alternately. It also aimed to collect non-Spanish speakers’ impressions on this writing style. This study includes a summary of the analysed text and reports on a 2-question survey with non-Spanish speakers to examine their impressions regarding the use of Spanish in an English text. The study aimed to answer the following research questions: 1) How does Anzaldúa’s writing style show her identity? 2) Why does she employ code switching in her writing? 3) What are the impressions of non-Spanish speaking speakers of English while reading Anzaldúa’s text excerpts written in English and Spanish? Results indicated that Anzaldúa’s writing represents her identity as someone not belonging to one, but to different cultures represented in her Chicana identity, as well as in the use of both English and Spanish to navigate the English and Spanish-speaking worlds. Furthermore, results indicate that the use of Spanish in her writing represents the need to connect to her Spanish-speaking audience. Participants indicated both positive and negative impressions related to their understanding of Anzaldúa’s code switching between English and Spanish in her writing.This study aimed to analyse Gloria Anzaldúa’s identity representation through her writing in How to Tame a Wild Tongue (Anzaldúa, 1987), where she uses English and Spanish alternately. It also aimed to collect non-Spanish speakers’ impressions on this writing style. This study includes a summary of the analysed text and reports on a 2-question survey with non-Spanish speakers to examine their impressions regarding the use of Spanish in an English text. The study aimed to answer the following research questions: 1) How does Anzaldúa’s writing style show her identity? 2) Why does she employ code switching in her writing? 3) What are the impressions of non-Spanish speaking speakers of English while reading Anzaldúa’s text excerpts written in English and Spanish? Results indicated that Anzaldúa’s writing represents her identity as someone not belonging to one, but to different cultures represented in her Chicana identity, as well as in the use of both English and Spanish to navigate the English and Spanish-speaking worlds. Furthermore, results indicate that the use of Spanish in her writing represents the need to connect to her Spanish-speaking audience. Participants indicated both positive and negative impressions related to their understanding of Anzaldúa’s code switching between English and Spanish in her writing.
description: Soares, Donzília (2020-2021) “Bilingualism represented in How to tame a wild tongue by Gloria Anzaldúa”, e-TEALS, 11-12, ISSN 1647-721X
Closure Relations for Electron-Positron Pair-Signatures in Gamma-Ray Bursts
Creators: name: Murase, Kohta
name: Ioka, Kunihito
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present recipes to diagnose the fireball of gamma-ray bursts (GRBs) by combining observations of electron-positron pair-signatures (the pair-annihilation line and the cutoff energy due to the pair-creation process). Our recipes are largely model-independent and extract information even from the non-detection of either pair-signature. We evaluate physical quantities such as the Lorentz factor, optical depth and pair-to-baryon ratio, only from the observable quantities. In particular, we can test whether the prompt emission of GRBs comes from the pair/baryonic photosphere or not. The future-coming Gamma-Ray Large Area Space Telescope (GLAST) satellite will provide us with good chances to use our recipes by detecting or non-detecting pair-signatures.
description: 7 pages, 4 figures, accepted for publication in ApJ, with extended discussions. Conclusions unchanged
Ancestral Sequence Reconstruction for Co-evolutionary models
Creators: name: Horta, Edwin Rodríguez
name: Lage-Castellanos, Alejandro
name: Mulet, Roberto
Publisher: name: arXiv
Year: 2021
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Populations and Evolution (q-bio.PE)
subject: FOS: Physical sciences
subject: FOS: Biological sciences

description: The ancestral sequence reconstruction problem is the inference, back in time, of the properties of common sequence ancestors from measured properties of contemporary populations. Standard algorithms for this problem assume independent (factorized) evolution of the characters of the sequences, which is generally wrong (e.g. proteins and genome sequences). In this work, we have studied this problem for sequences described by global co-evolutionary models, which reproduce the global pattern of cooperative interactions between the elements that compose it. For this, we first modeled the temporal evolution of correlated real valued characters by a multivariate Ornstein-Uhlenbeck process on a finite tree. This represents sequences as Gaussian vectors evolving in a quadratic potential, who describe selection forces acting on the evolving entities. Under a Bayesian framework, we developed a reconstruction algorithm for these sequences and obtained an analytical expression to quantify the quality of our estimation. We extend this formalism to discrete valued sequences by applying our method to a Potts model. We showed that for both continuous and discrete configurations, there is a wide range of parameters where, to properly reconstruct the ancestral sequences, intra-species correlations must be taken into account. We also demonstrated that, for sequences with discrete elements, our reconstruction algorithm outperforms traditional schemes based on independent site approximations.
description: 35 pages, 8 figures
Option pricing under stochastic volatility: the exponential Ornstein-Uhlenbeck model
Creators: name: Perello, Josep
name: Sircar, Ronnie
name: Masoliver, Jaume
Publisher: name: arXiv
Year: 2008
Subjects: subject: Pricing of Securities (q-fin.PR)
subject: Computational Physics (physics.comp-ph)
subject: Physics and Society (physics.soc-ph)
subject: FOS: Economics and business
subject: FOS: Physical sciences

description: We study the pricing problem for a European call option when the volatility of the underlying asset is random and follows the exponential Ornstein-Uhlenbeck model. The random diffusion model proposed is a two-dimensional market process that takes a log-Brownian motion to describe price dynamics and an Ornstein-Uhlenbeck subordinated process describing the randomness of the log-volatility. We derive an approximate option price that is valid when (i) the fluctuations of the volatility are larger than its normal level, (ii) the volatility presents a slow driving force toward its normal level and, finally, (iii) the market price of risk is a linear function of the log-volatility. We study the resulting European call price and its implied volatility for a range of parameters consistent with daily Dow Jones Index data.
description: 26 pages, 6 colored figures
Visual Data Mining of Genomic Databases by Immersive Graph-Based Exploration
Creators: name: Férey, Nicolas
name: Gros, Pierre-Emmanuel
name: Hérisson, Joan
name: Gherbi, Rachid
Publisher: name: arXiv
Year: 2007
Subjects: subject: Quantitative Methods (q-bio.QM)
subject: FOS: Biological sciences

description: Biologists are leading current research on genome characterization (sequencing, alignment, transcription), providing a huge quantity of raw data about many genome organisms. Extracting knowledge from this raw data is an important process for biologists, using usually data mining approaches. However, it is difficult to deals with these genomic information using actual bioinformatics data mining tools, because data are heterogeneous, huge in quantity and geographically distributed. In this paper, we present a new approach between data mining and virtual reality visualization, called visual data mining. Indeed Virtual Reality becomes ripe, with efficient display devices and intuitive interaction in an immersive context. Moreover, biologists use to work with 3D representation of their molecules, but in a desktop context. We present a software solution, Genome3DExplorer, which addresses the problem of genomic data visualization, of scene management and interaction. This solution is based on a well-adapted graphical and interaction paradigm, where local and global topological characteristics of data are easily visible, on the contrary to traditional genomic database browsers, always focused on the zoom and details level.
The targum (1948:Apr. 6 - 1948:Apr. 30)
Creators: name: No Name Supplied
Publisher: name: Targum Association
Year: 1948

description: Some University historians indicate that the Targum was first published as an annual in 1867, but of this we have no extant evidence. In January 1869, the Targum as we now know it, made its appearance as a monthly paper that concerned itself with student “literary contributions” and college news as well as serving as a vehicle for bringing news to alumni and the general public. The newspaper, which originally was for sale, varied in frequency over the years as did its title (The Targum, Rutgers Targum, Rutgers Daily Targum, and Daily Targum). The newspaper has continuously been published since 1869 with the exception of 19 months during the second world war, between February 1944 and October 1945. The Targum was published by the students of Rutgers College, and later Rutgers University—New Brunswick represented through the years as the Targum Association, Rutgers Targum Association, and Rutgers College Targum. As a student organization, the Targum operated under the oversight of the dean of students and student government but in October 1980, the Targum became an independent college paper.
Electronic structures of CeRu$_2X_2$ ($X$ = Si, Ge) in the paramagnetic phase studied by soft X-ray ARPES and hard X-ray photoelectron spectroscopy
Creators: name: Yano, M.
name: Sekiyama, A.
name: Fujiwara, H.
name: Amano, Y.
name: Imada, S.
name: Muro, T.
name: Yabashi, M.
name: Tamasaku, K.
name: Higashiya, A.
name: Ishikawa, T.
name: Onuki, Y.
name: Suga, S.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Soft and hard X-ray photoelectron spectroscopy (PES) has been performed for one of the heavy fermion system CeRu$_2$Si$_2$ and a $4f$-localized ferromagnet CeRu$_2$Ge$_2$ in the paramagnetic phase. The three-dimensional band structures and Fermi surface (FS) shapes of CeRu$_2$Si$_2$ have been determined by soft X-ray $hν$-dependent angle resolved photoelectron spectroscopy (ARPES). The differences in the Fermi surface topology and the non-$4f$ electronic structures between CeRu$_2$Si$_2$ and CeRu$_2$Ge$_2$ are qualitatively explained by the band-structure calculation for both $4f$ itinerant and localized models, respectively. The Ce valences in CeRu$_2X_2$ ($X$ = Si, Ge) at 20 K are quantitatively estimated by the single impurity Anderson model calculation, where the Ce 3d hard X-ray core-level PES and Ce 3d X-ray absorption spectra have shown stronger hybridization and signature for the partial $4f$ contribution to the conduction electrons in CeRu$_2$Si$_2$.
description: 8figures
Theory and simulation of ion drag on dust in magnetised plasmas
Creators: name: James, Lloyd Thomas
Publisher: name: Imperial College London
Year: 2021

description: Accurate modelling of the forces acting on dust is imperative to the simulation of dust transport in magnetic confinement fusion (MCF) plasmas. Conventional models of one of the most significant of these forces, the ion drag force, neglect to consider the direct effect of the strong magnetic fields present in an MCF plasma on the trajectories of ions in the vicinity of a dust particle. This thesis presents novel theoretical models of ion drag which show that magnetic effects are significant and cannot be neglected in relevant parameter regimes. This is supported by numerical results obtained through modifications to the DiMPl Monte Carlo code, which demonstrate clear agreement with the theoretical models. Conventional modelling of ion drag further assumes that dust is smaller than the Debye length of the plasma in which it is immersed. This is not always the case in tokamaks. This thesis describes how existing numerical models of charging of large dust grains can be applied to modelling the ion drag force on such grains. We extend our study of magnetic effects to this large dust regime, presenting numerical results for both the charging of, and ion drag on, large dust grains under strong magnetic fields. Finally, aspiring to be of immediate practical use to those involved in dust transport modelling, this thesis presents a set of semi-empirical models that may be straightforwardly employed to capture the effects of magnetic fields on small and large dust grains, and therein significantly improve the accuracy of these codes in modelling the trajectories of dust grains under strong magnetic field conditions.
Stable, metastable and unstable states in the mean-field RFIM at T=0
Creators: name: Rosinberg, M. L.
name: Tarjus, G.
name: Perez-Reche, F. J.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We compute the probability of finding metastable states at a given field in the mean-field random field Ising model at T=0. Remarkably, this probability is finite in the thermodynamic limit, even on the so-called ``unstable'' branch of the magnetization curve. This implies that the branch is reachable when the magnetization is controlled instead of the magnetic field, in contrast with the situation in the pure system.
description: 10 pages, 3 figures
Universal cumulants of the current in diffusive systems on a ring
Creators: name: Appert-Rolland, Cécile
name: Derrida, Bernard
name: Lecomte, Vivien
name: Van Wijland, Frédéric
Publisher: name: arXiv
Year: 2008
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We calculate exactly the first cumulants of the integrated current and of the activity (which is the total number of changes of configurations) of the symmetric simple exclusion process (SSEP) on a ring with periodic boundary conditions. Our results indicate that for large system sizes the large deviation functions of the current and of the activity take a universal scaling form, with the same scaling function for both quantities. This scaling function can be understood either by an analysis of Bethe ansatz equations or in terms of a theory based on fluctuating hydrodynamics or on the macroscopic fluctuation theory of Bertini, De Sole, Gabrielli, Jona-Lasinio and Landim.
Refractometer for Tracking Changes in the Refractive Index of Air Near 780 nm
Creators: name: Khélifa, N. -E.
name: Fang, H.
name: Xu, J.
name: Juncar, P.
name: Himbert, M.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: A new system, consisting of a double channel Fabry Perot etalon and laser diodes emitting around 780 nm is described and proposed to be used for air refractive index measurements. The principle of this refractometer is based on frequency measurements between optical laser sources. It permits quasi-instantaneous measurement with a resolution better than and uncertainty in the range. Some preliminary results on the stability of this system and the measurements of the refractive index of air with this apparatus are presented. The first measurements of the index of air at 780 nm are, within an experimental uncertainty of the order of, in agreement with the predicted values by the so-called revised Edlén equations. This result is to the best of our knowledge the first to extend to the near infra-red the validity of the revised Edlén equation derived for the wavelength range 350- 650 nm.
Homological algebra for affine Hecke algebras
Creators: name: Opdam, Eric
name: Solleveld, Maarten
Publisher: name: arXiv
Year: 2007
Subjects: subject: Representation Theory (math.RT)
subject: FOS: Mathematics
subject: 20C08, 18Gxx, 20F55

description: In this paper we study homological properties of modules over an affine Hecke algebra H. In particular we prove a comparison result for higher extensions of tempered modules when passing to the Schwartz algebra S, a certain topological completion of the affine Hecke algebra. The proof is self-contained and based on a direct construction of a bounded contraction of certain standard resolutions of H-modules. This construction applies for all positive parameters of the affine Hecke algebra. This is an important feature since it is an ingredient to analyse how the irreducible discrete series representations of H arise in generic families over the parameter space of H. For irreducible non-simply laced affine Hecke algebras this will enable us to give a complete classification of the discrete series characters for all positive parameters (we will report on this application in a separate article).
description: 54 pages
PeV Gravitino, Weak-scale Higgsino and GeV Axino in KKLT
Creators: name: Bae, Kyu Jung
name: Jeong, Kwang Sik
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We realize high scale supersymmetry in the mirage mediation. The Higgs sector is extended with the Peccei-Quinn symmetry, and the higgsino mass term is generated by the Kim-Nilles mechanism. In particular, the Peccei-Quinn symmetry breaking scale naturally lies on the mirage messenger scale due to the mixed modulus-anomaly mediation with the gauge coupling unification. Consequently, the higgsino mass term is of order the weak scale while the gravitino mass is of PeV order. This hierarchy naturally leads to the correct electroweak symmetry breaking. The higgsinos are thus in the range accessible at future lepton colliders, while other sparticles are well-above the current LHC reach and consistent with the observed Higgs boson. The axino is dominantly produced from the modulus decay and accounts for the correct dark matter abundance.
description: 8 pages, 1 figure
Imaging reconstruction for infrared interferometry: first images of YSOs environment
Creators: name: Renard, S.
name: Malbet, F.
name: Thiebaut, E.
name: Berger, J. -P.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The study of protoplanetary disks, where the planets are believed to form, will certainly allow the formation of our Solar System to be understood. To conduct observations of these objects at the milli-arcsecond scale, infrared interferometry provides the right performances for T Tauri, FU Ori or Herbig Ae/Be stars. However, the only information obtained so far are scarce visibility measurements which are directly tested with models. With the outcome of recent interferometers, one can foresee obtaining images reconstructed independently of the models. In fact, several interferometers including IOTA and AMBER on the VLTI already provide the possibility to recombine three telescopes at once and thus to obtain the data necessary to reconstruct images. In this paper, we describe the use of MIRA, an image reconstruction algorithm developed for optical inter- ferometry data (squared visibilities and closure phases) by E. Thiebaut. We foresee also to use the spectral information given by AMBER data to constrain even better the reconstructed images. We describe the use of MIRA to reconstruct images of young stellar objects out of actual data, in particular the multiple system GW Orionis (IOTA, 2004), and discuss the encountered difficulties.
description: 10 pages, 6 figures, Proc. SPIE conference 7013 "Optical and Infrared Interferometry" (Marseille 2008)
title: Group Dynamics: Relational Learning through Liminoid Problem-Solving Teamwork
Creators: name: Thompson, N
Publisher: name: Liverpool John Moores University
Year: 2020

description: This research developed a novel synthesis of four theories using connections discovered through a literature-review: this synthesis was called the Modulated Liminoid Group Learning Synthesis (MLGLS). A mixed-method exploratory experiment was developed to collect and analyse participants’ experience in problem-solving teams in the United States, the United Kingdom, and Hong Kong. This study found that problem-solving groups experienced a cyclic process of group development, personal investment, and liminoid or flow-related engrossment within liminoid communitas. This cyclic process occurred while the group worked together to develop enough understanding of an activity to solve it. After this group process, a direct debrief produced transferrable relational learning during a postliminoid state. This study confirmed the occurrence of Liminoid Group Learning processes. The findings of this study concluded that participants in problem-solving groups build temporary communities that result in powerful relational learning. The development of these temporary communities allowed participants to reflect on how they wanted their current group to function, developing their conclusions about how future groups should operate. Participants’ reflective conclusions about current and future groups, called relational learning, is a powerful learning outcome for practitioners to employ because it provides a framework for producing inter-relational growth. Another finding of this research underscores the importance for participants to personally invest themselves in group activities because it jump-starts a group’s development. Personally investing in a group activity is a critical aspect that leads to a group’s formation, ability to solve a problem, and resultant relational learning. The findings of this study provide applicational tools for both the group dynamics facilitator as well as the group participant that produce improved relational abilities in future group dynamics scenarios.
Nonuniform states in noncentrosymmetric superconductors
Creators: name: Mineev, V. P.
name: Samokhin, K. V.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: In noncentrosymmetric crystals, nonuniform superconducting states are possible even in the absence of any external magnetic field. The origin of these states can be traced to the Lifshitz invariants in the free energy, which are linear in spatial gradients. We show how various types of the Lifshitz invariants in noncentrosymmetric superconductors can be derived from microscopic theory.
description: 7 pages
Slow cortical brain potentials in criminal psychopaths
Creators: name: Forth, Adelle Elizabeth
Publisher: name: University of British Columbia
Year: 2010

description: Slow cortical potentials and electrodermal activity were recorded while criminal psychopaths performed a two-stimulus anticipation task with monetary reward and punishment. Twelve psychopathic and twelve nonpsychopathic male criminals received auditory stimuli signalling that monetary gain, monetary loss, or no reinforcement would occur at the end of a 6-second foreperiod. There were no electrodermal differences between groups across the reinforcement conditions. Slow EEG activity consisted of two components, identified as the early and late contingent negative variation (CNV). The late CNV did not vary as a function of group. Statistically significant group differences did emerge for the early CNV, with the early CNV of psychopaths being larger across all conditions that those of the nonpsychopaths. The latter result was consistent with the hypothesis that psychopaths have a heightened capacity to selectively attend to events that interest them.
Odd Microswimmer
Creators: name: Yasuda, Kento
name: Hosaka, Yuto
name: Sou, Isamu
name: Komura, Shigeyuki
Publisher: name: arXiv
Year: 2021
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We propose a model for a thermally driven microswimmer in which three spheres are connected by two springs with odd elasticity. We demonstrate that the presence of odd elasticity leads to the directional locomotion of the stochastic microswimmer.
Investigation of the Relationship between the Fungal Deterioration of the Manuscripts of Astan Quds Razavi Documents Center and Library with the Air and its Evaluation in the Paper Model
Creators: name: Mohammadi, Parisa
name: Shokrzadeh, Leila
name: Bahreini, Masoumeh
name: Behdani, Samira
name: Jazari, Ali Asgar Sabet
Publisher: name: figshare
Year: 2021
Subjects: subject: Microbiology
subject: FOS: Biological sciences
subject: 60504 Microbial Ecology

description: Fungi are the most important agents of biodeterioration in museums, libraries, and repositories. The objective of the present study was to evaluate the microbial diversity in biodeteriorated manuscripts located in a repository of the central library of Astan Quds Razavi and to estimate the fungal occurrence of the repository air. The sterile cotton swabs and nitrocellulose membranes were used for sampling the manuscripts, while the sedimentation method was used for the microbial sampling of air. To evaluate the biodeteriorative impacts of fungi, fungal spore's suspension inoculated on paper strips. 14 and 6 fungal isolates were collected from the three different deteriorated substrates and the repository air samples, respectively. Among the fungi isolates, Aspergillus sp. was isolated in high frequency (36%), followed by Penicillium sp. (21.5%) and Alternaria sp. (14%). Fungi species including P. chrysogenum, Cladosporium cladosporioides, Talaromyces diversus, and Aspergillus sp. were isolated from B1 sample as a parchment that may be low water activity and halophilic fungi. The most fungal isolates (53%) in the air repository including Purpureocillium lilacinum, Talaromyces diversus, Cladosporium sp., and Aspergillus sp. were achieved from MEA medium. The low number of isolated fungi from repository air can be attributed to the efficiently controlled environment factors of Astan Quds Razavi repository. The combination of finding provides some support for the conceptual premise that it could be a direct relationship between the isolated microorganisms from the air and those isolated from the manuscripts. The presence of color spots on paper strips can approve the biodeterioration of paper via fungal activities.
GeV photon absorption in cosmologically evolving quasar environments
Creators: name: Reimer, A.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The question of a possible redshift-dependence of gamma-ray absorption due to gamma-gamma pair production of jet photons in the accretion disk and BLR radiation field in strong-line quasars is investigated. For this relevant aspects of cosmological black hole and quasar evolution are applied to the expected pair production opacity of GeV-photons in those sources. I demonstrate that for positively evolving and non-evolving accretion rates over cosmological time, detectable gamma-ray optical depths originating within the AGN system will show a redshift-dependence in the LAT energy range with larger opacity from sources at higher redshifts. This introduces ambiguities in the interpretation of spectral absorption features, and complicates approaches for estimating the evolution of the extragalactic background light by probing the gamma-ray horizon when using blazars whose external photon fields are involved in gamma-ray production.
description: 2 pages, 2 figures; to appear in the Proc. of the First Int. GLAST Symp. (Stanford, Feb. 5-8, 2007), eds. S.Ritz, P.F.Michelson, and C.Meegan, AIP Conf. Proc
Reflection of neuroblastoma intratumor heterogeneity in the new OHC‐NB1 disease model
Creators: name: Thole, Theresa M.
name: Toedling, Joern
name: Sprüssel, Annika
name: Pfeil, Sebastian
name: Savelyeva, Larissa
name: Capper, David
name: Messerschmidt, Clemens
name: Beule, Dieter
name: Groeneveld‐Krentz, Stefanie
name: Eckert, Cornelia
name: Gambara, Guido
name: Henssen, Anton G.
name: Finkler, Sabine
name: Schulte, Johannes H.
name: Sieber, Anja
name: Bluethgen, Nils
name: Regenbrecht, Christian R. A.
name: Künkele, Annette
name: Lodrini, Marco
name: Eggert, Angelika
name: Deubzer, Hedwig E.
Publisher: name: Charité - Universitätsmedizin Berlin
Year: 2019
Subjects: subject: embryonal tumor
subject: single-nucleotide variant analysis
subject: copy number variation analysis
subject: clonal reconstruction
subject: MYCN amplification
subject: preclinical drug testing
subject: 600 Technik, Medizin, angewandte Wissenschaften::610 Medizin und Gesundheit::610 Medizin und Gesundheit

description: Accurate modeling of intratumor heterogeneity presents a bottleneck against drug testing. Flexibility in a preclinical platform is also desirable to support assessment of different endpoints. We established the model system, OHC-NB1, from a bone marrow metastasis from a patient diagnosed with MYCN-amplified neuroblastoma and performed whole-exome sequencing on the source metastasis and the different models and passages during model development (monolayer cell line, 3D spheroid culture and subcutaneous xenograft tumors propagated in mice). OHC-NB1 harbors a MYCN amplification in double minutes, 1p deletion, 17q gain and diploid karyotype, which persisted in all models. A total of 80-540 single-nucleotide variants (SNVs) was detected in each sample, and comparisons between the source metastasis and models identified 34 of 80 somatic SNVs to be propagated in the models. Clonal reconstruction using the combined copy number and SNV data revealed marked clonal heterogeneity in the originating metastasis, with four clones being reflected in the model systems. The set of OHC-NB1 models represents 43% of somatic SNVs and 23% of the cellularity in the originating metastasis with varying clonal compositions, indicating that heterogeneity is partially preserved in our model system.
MODELING OF SOFTWARE TIME CHARACTERISTICS
Creators: name: Kuz, Mykola
name: Shevliuk, L.
name: Ostafiichuk, T.
name: Mishagin, R.
Publisher: name: figshare
Year: 2025
Subjects: classificationCode: 461207
subject: Software quality, processes and metrics

description: The proposed model is more convenient considering that from over 40 mathematical dependencies for determinating time parameters of software quality indicators, only 7 analytical dependencies have been defined.
A short note on the accuracy of the discontinuous Galerkin method with reentrant faces
Creators: name: Pazner, Will
name: Haut, Terry
Publisher: name: arXiv
Year: 2021
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics

description: We study the convergence of the discontinuous Galerkin (DG) method applied to the advection-reaction equation on meshes with reentrant faces. On such meshes, the upwind numerical flux is not smooth, and so the numerical integration of the resulting face terms can only be expected to be first-order accurate. Despite this inexact integration, we prove that the DG method converges with order $\mathcal{O}(h^{p+1/2})$, which is the same rate as in the case of exact integration. Consequently, specialized quadrature rules that accurately integrate the non-smooth numerical fluxes are not required for high-order accuracy. These results are numerically corroborated on examples of linear advection and discrete ordinates transport equations.
description: 9 pages, 2 figures
On the Global Attractor of Delay Differential Equations with Unimodal Feedback
Creators: name: Liz, Eduardo
name: Röst, Gergely
Publisher: name: arXiv
Year: 2008
Subjects: subject: Dynamical Systems (math.DS)
subject: Classical Analysis and ODEs (math.CA)
subject: FOS: Mathematics
subject: 34K20, 34D45

description: We give bounds for the global attractor of the delay differential equation $x'(t) =-μx(t)+f(x(t-τ))$, where $f$ is unimodal and has negative Schwarzian derivative. If $f$ and $μ$ satisfy certain condition, then, regardless of the delay, all solutions enter the domain where f is monotone decreasing and the powerful results for delayed monotone feedback can be applied to describe the asymptotic behaviour of solutions. In this situation we determine the sharpest interval that contains the global attractor for any delay. In the absence of that condition, improving earlier results, we show that if the d5A5Aelay is sufficiently small, then all solution enter the domain where $f'$ is negative. Our theorems then are illustrated by numerical examples using Nicholson's blowflies equation and the Mackey-Glass equation.
description: 10 pages, submitted to Discrete and Continuous Dynamical Systems-Series A (DCDS)
Tailoring the band structure of twisted double bilayer graphene with pressure
Creators: name: Szentpéteri, Bálint
name: Rickhaus, Peter
name: de Vries, Folkert K.
name: Márffy, Albin
name: Fülöp, Bálint
name: Tóvári, Endre
name: Watanabe, Kenji
name: Taniguchi, Takashi
name: Kormányos, Andor
name: Csonka, Szabolcs
name: Makk, Péter
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Twisted two-dimensional structures open new possibilities in band structure engineering. At magic twist angles, flat bands emerge, which give a new drive to the field of strongly correlated physics. In twisted double bilayer graphene dual gating allows changing the Fermi level and hence the electron density and also allows tuning the interlayer potential, giving further control over band gaps. Here, we demonstrate that by applying hydrostatic pressure, an additional control of the band structure becomes possible due to the change of tunnel couplings between the layers. We find that the flat bands and the gaps separating them can be drastically changed by pressures up to 2 GPa, in good agreement with our theoretical simulations. Furthermore, our measurements suggest that in finite magnetic field due to pressure a topologically non-trivial band gap opens at the charge neutrality point at zero displacement field.
description: 19 pages, 15 figures
Structural and functional study of vesicular acetylcholine transporter (VAChT)
Creators: name: Kwong, Hok Sau
Publisher: name: Imperial College London
Year: 2021

description: The need to study novel protein targets for insecticide research is paramount as insecticide-resistant pests are putting global food production at risk. Acetylcholine (ACh) is a major neurotransmitter in the insect’s central nervous system. Proteins in the ACh signalling pathway, such as the nicotinic acetylcholine receptor and acetylcholinesterase, have been heavily exploited as insecticide targets. The vesicular acetylcholine transporter (VAChT) is an integral membrane protein (IMP) belonging to the Major Facilitator Superfamily (MFS) and is an unexplored target in the ACh pathway. The aim of the project was to study VAChT structurally using X-ray crystallography, and to biochemically characterise the protein using ligand binding and transport assays. The production of VAChT in high enough quantities and purity for these studies was a significant challenge. Therefore, VAChT genes of various species have been expressed in yeast, bacterial and insect cell systems to increase the possibility of success. Yeast membrane containing VAChT was extracted from Saccharomyces cerevisiae and had the ability to bind a ligand, as confirmed by a radioligand binding assay. VAChT from Tribolium castaneum & Acyrthosiphon pisum displayed a high affinity towards the insecticidal compound – SYN01, with Kd values of 6 nM & 2.4 nM respectively. However, the purification of VAChT proved to be difficult and degradation was observed at various stages of the process. To overcome this issue, several methods to improve the stability of this membrane protein were investigated, including fusion partner proteins, transport deficient mutations and the use of high affinity ligands.