cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Casimir-Polder interaction between an excited atom and a gas dielectric medium
Creators: name: Sherkunov, Yury
Publisher: name: arXiv
Year: 2006
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The Casimir-Polder potential for interaction between an excited atom and a ground-state one in the retarded case obtained with the help of perturbation technique drops as R^-2 with the distance between the atoms [E.A. Power, T.Thirunamachandran, Phys. Rev. A, 47, 2539 (1993)]. It results in diverdent integrals for interaction between an excited atom and a dilute gas medium. We investigate interaction between two atoms embedded in a dielectric medium with the help of non-perturbative approach. We take into account absorption of photons in the medium. This approach solves the problem of divergence. We consider interaction between an excited atom and a planar dielectric gas medium of ground-state atoms. We show that the retarded interaction between an excited atom and a gas of ground-state atoms is not oscillating but follows a simple power law. We show that to obtain coventional non-retarded expression for the van der Waals force between an excited atom and a dilute gas the distance between the atom and the interface should be much smaller than the free mean pass of a photon in the medium. Interaction between an excited atom and a hemisphere of ground-state atoms is considered.
description: 23 pages, 6 figures
Microbiology of a reclaimed uranium mine, Laguna Pueblo, NM
Creators: name: Chavez, Olivia Raquel
Publisher: name: Zenodo
Year: 2016
Subjects: microbiology
environmental studies
biology
bacteria
metagenome
reclamation
soil
uranium

description: The Jackpile Mine near Laguna Pueblo is located in the New Mexico uranium belt and was once the worlds largest open pit uranium mine. After the mine closed, it was reclaimed by the addition of soil on top of the mine tailings and leftover ore. This study aimed to characterize the microbial communities in the soil in relation to uranium concentrations and the effects of mining. Soil was sampled aseptically, DNA was extracted, and high-throughput metagenomic sequencing was performed at the National Center for Genome Resources. The results showed a wide range of typical arid soil microbes and a strong representation from metal reducers, e.g., Geobacter spp. There was also evidence that the relative abundances of some genera, including Rhodopseudomonas, Bradyrhizobium, and Rubrobacter, are affected by concentrations of nickel, selenium, and zinc. Uranium does not appear to be driving functional gene or phylogenetic differences among the six soils sampled.
description: 40 pages, Masters Thesis, Biology
Quark spin content of the proton, hyperon semileptonic decays, and the decay width of the $Θ^{+}$ pentaquark
Creators: name: Yang, Ghil-Seok
name: Kim, Hyun-Chul
name: Goeke, Klaus
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Using the exisiting experimental data for hyperon semileptonic decays and the flavor-singlet axial-vector charge $g_{A}^{(0)}$ from polarized deep inelastic scattering of the proton, we derive the decay width of the $Θ^{+}$ pentaquark baryon. We take into account the effects of flavor SU(3) symmetry breaking within the framework of the chiral quark-soliton model. All dynamical parameters of the model are fixed by using the five experimental hyperon semileptonic decay constants and flavor singlet axial-vector charge. We obtain the numerical results of the decay width of the $Θ^{+}$ pentaquark baryon as a function of the pion-nucleon sigma term $Σ_{πN}$ and investigate the dependence of the decay width of the $Θ^{+}$ on the $g_{A}^{(0)}$, varying the $g_{A}^{(0)}$ within the range of the experimental uncertainty. We demonstrate that the combined values of all known semileptonic decays with the generally accepted value of $g_{A}^{(0)} \approx 0.3$ for the proton are compatible with a small decay width $Γ_{ΘKN}$ of the $Θ^{+}$ pentaquark, i.e. $Γ_{ΘKN} \leq 1$ MeV.
description: 11 pages, 2 figures. Title has been changed, some of the text has been modified, and more references have been added. The final version accepted for publication in Phys. Rev. D
Η επίδραση των επιχειρησιακών συστημάτων E.R.P. στο κόστος:
Creators: name: Πλατσά, Μαρία Αλέξανδρου
Publisher: name: Aristotle University of Thessaloniki
Year: 2012
Subjects: E.R.P.
κόστος
κοστολόγηση
enterprise resource system
cost
costing methods

description: Το αντικείμενο αυτής της πτυχιακής εργασίας πραγματεύεται την επίδραση των πληροφοριακών συστημάτων E.R.P. στην απόδοση της επιχείρησης και ειδικά στον τομέα της κοστολόγησης. Αρχικά, παρουσιάζονται ορισμένες βασικές έννοιες για τα E.R.P., ενώ αναπτύσσονται και οι παράγοντες επιτυχίας τους στις επιχειρήσεις όπου εγκαθίστανται. Ακολούθως, γίνεται αναφορά στις κατηγορίες κόστους και ποιες μορφές κόστους συμπεριλαμβάνονται σε αυτές. Έπειτα, αναλύονται οι μέθοδοι κοστολόγησης καθώς και οι μέθοδοι αποτίμησης των αποθεμάτων που επηρεάζουν σημαντικά το κόστος πωληθέντων, αλλά και το ενεργητικό μιας επιχείρησης. Προχωρώντας στο εμπειρικό τμήμα της επιχείρησης, η έρευνα που διεξήχθη αφορούσε 40 βιομηχανικές επιχειρήσεις που είναι εισηγμένες στο Χρηματιστήριο Αξιών Αθηνών. Η μεθοδολογία που εφαρμόστηκε βασίστηκε στην μελέτη των Poston και Grabski (2001). Αφού συγκεντρώθηκαν πληροφορίες για το έτος εγκατάστασης του E.R.P. που χρησιμοποιούν, συλλέχθηκαν οι οικονομικές καταστάσεις για την τριετία πριν και μετά την εφαρμογή τους. Αρχικά, έγινε μια απλή στατιστική ανάλυση των πρώτων αποτελεσμάτων, αλλά στην συνέχεια έγιναν υποθέσεις για την πορεία διαφόρων μορφών κόστους, καθώς και του υπολειμματικού εισοδήματος. Έπειτα, έγινε η σύγκριση των μέσων όρων των παραπάνω δεικτών με την βοήθεια του οικονομετρικού προγράμματος SPSS και προέκυψαν συμπεράσματα όσον αφορά τη θετική ή ανύπαρκτη επίδραση του E.R.P. στη μείωση του κόστους και στην αύξηση του υπολειμματικού εισοδήματος.
description: This dissertation examines the effect of operational systems E.R.P. on costing and if Greek enterprises have been benefited by the usage of these systems. At the beginning, we analyze the basic operations that E.R.P. are able to fulfill and how the integration it offers can help each company. Afterwards, we present the basic methods of costing and the methods of inventory evaluation. Before our research is presented, we refer to other researches and their conclusions about the effect of E.R.P. on cost and the factors that influence the successful adaptation of such a system. At last, our research is going to prove whether 40 large Greek companies managed to install successfully their E.R.P. system and if this success is mirrored on their financial statements. Our sample has been chosen from the database of Athens Stock Exchange and includes only manufacturing companies. We collected data from the financial statements for three years before and after the implementation of E.R.P. and after making the proper calculations, we concluded about the effect of this operational system on the performance of the company and especially on cost.
The full Boltzmann hierarchy for dark matter-massive neutrino interactions
Creators: name: Mosbech, Markus R.
name: Boehm, Celine
name: Hannestad, Steen
name: Mena, Olga
name: Stadler, Julia
name: Wong, Yvonne Y. Y.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The impact of dark matter-neutrino interactions on the measurement of the cosmological parameters has been investigated in the past in the context of massless neutrinos exclusively. Here we revisit the role of a neutrino-dark matter coupling in light of ongoing cosmological tensions by implementing the full Boltzmann hierarchy for three massive neutrinos. Our tightest 95% CL upper limit on the strength of the interactions, parameterized via $u_χ=\frac{σ_0}{σ_{Th}}\left(\frac{m_χ}{100 \text{GeV}}\right)^{-1}$, is $u_χ\leq3.34 \cdot 10^{-4}$, arising from a combination of Planck TTTEEE data, Planck lensing data and SDSS BAO data. This upper bound is, as expected, slightly higher than previous results for interacting massless neutrinos, due to the correction factor associated with neutrino masses. We find that these interactions significantly relax the lower bounds on the value of $σ_8$ that is inferred in the context of $Λ$CDM from the Planck data, leading to agreement within 1-2$σ$ with weak lensing estimates of $σ_8$, as those from KiDS-1000. However, the presence of these interactions barely affects the value of the Hubble constant $H_0$.
description: 31 pages, 8 figures, 3 tables
What does 1.0 take? MISO LIMS after 9 years of development
Creators: name: Taschuk, Morgan
name: Armstrong, Heather
name: Cooke, Dillan
name: Masella, Andre
name: Varsava, Alexis
name: Jorgensen, Lars
Publisher: name: F1000 Research Limited
Year: 2019

description: MISO is a laboratory information management system designed for eukaryotic sequencing operations. It supports genomic, exomic, transcriptomic, methyl-omic, and CHiP-seq protocols; long reads and short reads; and microarrays. MISO’s goals are to allow laboratory technicians to record their work accurately with a minimum of data entry overhead, and to ensure the associated metadata is valid and structured enough to use for automation and other downstream applications. MISO incorporates a wide feature set useful for both large and small facilities to track their lab workflows in great detail. Since last presented at BOSC 2016, MISO has matured and stabilized to support production use in a large sequencing facility. MISO supports new instruments like the Illumina NovaSeq, 10X Chromium, and Oxford Nanopore PromethION, added more extensive location tracking, improved UI interfaces to simplify data entry, has improved overall performance, and has extensive documentation in the form of a new user manual and walkthroughs. Recently we have improved installation, administration, and maintenance through Docker containers and compose files. We have developed other applications that interact with MISO to facilitate laboratory functions like billing, reporting, and analysis. After 8 years of development, we are preparing a 1.0 release for late 2019.
The experience of rejection : a single case study of a rejected adolescent
Creators: name: Jones, Sandra L.
Publisher: name: University of British Columbia
Year: 2009

description: The purpose of this study was to examine the experience of rejection for an adolescent. A single case study, using Hermenuetic Phenomenological method as described by van Manen (1990) was employed. Over the course of one year, the coresearcher was interviewed and audio-taped twelve times regarding his experiencing of rejection by his peers. The co-researcher also participated in informal meetings and provided samples of his poetry to the researcher. The material was analysed via hermenuetic phenomenological method and themes emerged. Finally a description of the experience of rejection was created by the researcher. The significant dimensions of the experience of rejection which emerged included; physical, cognitive, and emotional isolation and confusion; frustration, tension, anger, and violence; victimhood; communication difficulties; fantasy and magical thinking; alienation, exclusion, and sense of uselessness; negation and invisibility; and hopelessness and despair. In this case, the co-researcher made many attempts to connect meaningfully with society, but was often rebuffed. Based on these findings, implications and recommendations for both schools and counselling practice were outlined to assist those working with rejected adolescents.
Το Θέατρο της Κοινότητας, το Θέατρο για την Ανάπτυξη και το Εφαρμοσμένο Δράμα μέσα από τα παραδείγματα του Teatro Povero (Ιταλία), της Adugna Community Dance Theatre (Αιθιοπία) και της εφαρμογής στο EEtnisk Radgivningcenter Noor (Δανία)»:
Creators: name: Βασιλειάδου, Κορνηλία Ιωάννη
Publisher: name: Aristotle University of Thessaloniki
Year: 2012
Subjects: θέατρο
κοινότητα
ανάπτυξη
theatre
community
development

description: Η εργασία μελετά το Θέατρο της Κοινότητας, το Θέατρο για την Ανάπτυξη και το Εφαρμοσμένο Δράμα χρησιμοποιώντας τρεις περιπτώσεις εφαρμογής, το Teatro Povero της Ιταλίας, την Adugna Community Dance Theatre της Αιθιοπίας και το πρόγραμμα Εφαρμοσμένου Δράματος στο Etnisk Radgivingcenter Noor της Δανίας, αντίστοιχα. Αρχικά, επιχειρείται μία συνοπτική παρουσίαση της ορολογίας που έχει χρησιμοποιηθεί για να περιγράψει εφαρμογές και προγράμματα που χρησιμοποιούν το θέατρο για να φέρουν στο προσκήνιο προβλήματα, να παρέχουν εκπαίδευση και να προτείνουν λύσεις σε συγκεκριμένες ομάδες, τα χαρακτηριστικά των οποίων ποικίλλουν από συναθροίσεις ατόμων μέχρι οργανωμένες κοινότητες. Στη συνέχεια, επιλέγονται τρία είδη, το Θέατρο της Κοινότητας, το Θέατρο για την Ανάπτυξη και το Εφαρμοσμένο Δράμα, τα οποία παρουσιάζονται και μελετώνται πιο διεξοδικά μέσα από τα παραδείγματα εφαρμογών. Η εργασία επιθυμεί να αναδείξει τη δημιουργία θεάτρου που γεννιέται μέσα από την κοινότητα, με τη συνεργασία επαγγελματιών καλλιτεχνών, και στρέφεται γύρω από άξονες που αφορούν την κοινότητα, θεωρώντας ότι μια τέτοια ανταλλαγή είναι ικανή αφενός να εμπλουτίσει το θέατρο της εποχής μας και αφετέρου να ενδυναμώσει την κοινότητα στην οποία λαμβάνει χώρα.
description: The present thesis focuses on Community Theatre, Theatre for Development and Applied Drama using as guidelines the applications as they have been developed in the Italian Teatro Povero, the Ethiopian Adugna Community Dance Theatre and the Danish program that took place in the Etnisk Radgivingcenter Noor. The thesis commences with a brief presentation of the various names given to applications that make use of theatre as means of raising attention on problems of certain groups or communities, while providing education or/and solutions to these problems. Three of them are being selected for further presentation and research through an application example each: Community Theatre, Theatre for Development and Applied Drama. The thesis wishes to underline the importance of creating theatre from inside the community in collaboration with professional artists, reckoning that such an interchange can tremendously enrich theatre and empower the community alike.
Run Scanner: a sequencing-platform–agnostic tool for monitoring sequencer runs and accessing run information
Creators: name: Armstrong, Heather
name: Cooke, Dillan
name: Lazic, Savo
name: Masella, Andre
name: Varsava, Alexis
name: Taschuk, Morgan
Publisher: name: F1000 Research Limited
Year: 2019

description: As sequencing runs become faster and instruments can be run more frequently, data analysis can similarly be made more efficient by automating run monitoring. We have developed an application called Run Scanner to monitor sequencer run output directories and process run metadata (information about the run that excludes sequence data) from Illumina, PacBio, and Oxford Nanopore instruments. The run metadata is presented on a web server in both user-readable and machine-readable ways. Basic run metadata is presented in a standardized way for all modern sequencing platforms. Additional per-cycle metrics, which complement Illumina’s BaseSpace tools, are added to Illumina runs for all instruments from the HiSeq 2000 to the NovaSeq 6000. In addition to being accessible to users, Run Scanner data can also be queried by a variety of software consumers. The Run Scanner’s data can enhance lab workflows by updating information in a LIMS; can be sent to an ETL data integration to be queried for reports; and can provide valuable information to automated bioinformatics pipelines. Run Scanner has decreased our lab’s workload, increased our reporting capabilities, and dramatically decreased our time from run completion to analysis initiation. It is open source and freely available online: https://github.com/miso-lims/runscanner
3D Grid-Based Monte Carlo Code for Radiative Transfer through Raman and Rayleigh Scattering with Atomic Hydrogen -- STaRS
Creators: name: Chang, Seok-Jun
name: Lee, Hee-Won
Publisher: name: arXiv
Year: 2020
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Emission features formed through Raman scattering with atomic hydrogen provide unique and crucial information to probe the distribution and kinematics of a thick neutral region illuminated by a strong far UV emission source. We introduce a new 3 dimensional Monte-Carlo code in order to describe the radiative transfer of line photons that are subject to Raman and Rayleigh scattering with atomic hydrogen. In this code entitled "${\bf S}$ejong Radiative ${\bf T}$r${\bf a}$nsfer through ${\bf R}$aman and Rayleigh ${\bf S}$cattering (${\it STaRS}$), each photon is traced until escape with a tag attached carrying information including the position, direction, wavelength, and polarization. The thick neutral scattering region is divided into numerous cells with each cell being characterized by its velocity and density, which ensures huge flexibility of the code in analyzing Raman-scattered features formed in a neutral region with complicated kinematics and density distribution. As a test of the code, we revisit the formation of Balmer wings through Raman scattering of far UV continuum near Ly$β$ and Ly$γ$ in a static neutral region. An additional check is made to investigate Raman scattering of O VI in an expanding neutral medium. We find fairly good agreement of our results with previous works, demonstrating the capability of dealing with radiative transfer modeling that can be applied to spectropolarimetric imaging observations of various objects including symbiotic stars, young planetary nebulae, and active galactic nuclei.
description: 11 pages, 8 figures, accepted for publication in JKAS
Finite temperature density functional theory investigation to the nonequilibrium transient warm dense state created by laser excitation
Creators: name: Zhang, Hengyu
name: Zhang, Shen
name: Kang, Dongdong
name: Dai, Jiayu
name: Bonitz, M.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: We present a finite-temperature density functional theory investigation of the nonequilibrium transient electronic structure of warm dense Li, Al, Cu, and Au created by laser excitation. Photons excite electrons either from the inner shell orbitals or from the valence bands according to the photon energy, and give rise to isochoric heating of the sample. Localized states related to the 3d orbital are observed for Cu when the hole lies in the inner shell 3s orbital. The electrical conductivity for these materials at nonequilibrium states is calculated using the Kubo-Greenwood formula. The change of the electrical conductivity, compared to the equilibrium state, is different for the case of holes in inner shell orbitals or the valence band. This is attributed to the competition of two factors: the shift of the orbital energies due to reduced screening of core electrons, and the increase of chemical potential due to the excitation of electrons. The finite temperature effect of both the electrons and the ions on the electrical conductivity is discussed in detail. This work is helpful to better understand the physics of laser excitation experiments of warm dense matter.
description: 111 pages, 9 figures
Baryon Mass in medium with Holographic QCD
Creators: name: Seo, Yunseok
name: Sin, Sang-Jin
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study the baryon vertex (BV) in the presence of medium using DBI action and the force balance condition between BV and the probe branes. We note that a stable BV configuration exists only in some of the confining backgrounds. For the system of finite density, the issue is whether there is a canonical definition for the baryon mass in the medium. In this work, we define it as the energy of the deformed BV satisfying the force balance condition (FBC) with the probe brane. With FBC, lengths of the strings attached to the BV tend to be zero while the compact branes are enlongated to mimic the string. We attribute the deformation energy of the probe brane to the baryon-baryon interaction. We show that for a system with heavy quarks the baryon mass drops monotonically as a function of density while it has minimum in case of light quark system.
description: 24 pages, 14 figures, RevTeX, Typos and errors corrected
Scattering in D=5 super Yang-Mills theory and the relation to (2,0) theory
Creators: name: Flink, Erik
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Compactifying the A_1 version of (2,0) theory on a circle gives rise to five-dimensional, maximally supersymmetric Yang-Mills theory. In the Coulomb branch, where the SU(2) gauge group is spontaneously broken to a U(1) subgroup, the degrees of freedom are constituted by one massless and two massive vector multiplets. Because of the relation to the six-dimensional (2,0) theory, we are then interested in scattering processes where both the in-state and the out-state consist of one massless and one massive particle. We show that the corresponding part of the S matrix is determined by the symmetries of the theory up to a single unknown function, which depends on the energy and mass of the incoming particles, together with the scattering angle. Performing a straight forward scattering calculation by means of Feynman diagrams, this function is determined to leading order in a low-energy approximation. The result is strikingly simple, and it coincides exactly with the corresponding function in the (2,0) theory.
description: 17 pages, 1 figure
Fluctuation studies and energy reconstruction in a segmented calorimeter
Creators: name: Gavler, Sara Bergenius
name: Carlson, Per
name: Conrad, Jan
Publisher: name: arXiv
Year: 2006
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: In order to better understand energy estimation of electromagnetic showers in segmented calorimeters, detailed Geant4 simulation studies of electromagnetic showers in the energy range 1--100 GeV in CsI have been performed. When sampled in layers of 1.99 cm thickness, corresponding to 1.08 radiation lengths, the energy fluctuations in the samples show distributions that vary significantly with depth. The energy distributions are similar for incident electrons and photons and were found to change systematically along the shower, varying little with the initial energy. Three probability distributions have been fitted to the data: negative binomial, log-normal and Gaussian distributions, none of which gives a good fit over the full shower length. The obtained parameterizations might be useful in the use of the maximum likelihood method for estimating the energy. Two methods for estimating the energy have also been studied. One method is based on fitting individual longitudinal shower profiles with a $Γ$-function, the other one corrects the measured energy for leakage by utilizing the energy deposited in the last layer. Our simulations indicate that the last-layer correction method applied to photons and electrons of 1 and 10 GeV gives about a factor of 2 improvement in the energy resolution.
description: 5 pages, 8 figures, contribution to IEEE 2006 Nuclear Science Symposium, Medical Imaging Conference
Computing the luminosity distance via optimal homotopy perturbation method
Creators: name: Yu, Bo
name: Wang, Zi-Hua
name: Liu, De-Zi
name: Zhang, Tong-Jie
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences
subject: G.2.2
subject: 34F99

description: We propose a new algorithm for computing the luminosity distance in the flat universe with a cosmological constant based on Shchigolev's homotopy perturbation method, where the optimization idea is applied to prevent the arbitrariness of initial value choice in Shchigolev's homotopy. Compared with the some existing numerical methods, the result of numerical simulation shows that our algorithm is a very promising and powerful technique for computing the luminosity distance, which has obvious advantages in computational accuracy,computing efficiency and robustness for a given {Ω_m}.
description: 14 pages, 6 figures, 1 table
The influence of sedimentary facies, mineralogy, and diagenesis on reservoir properties of the coal-bearing Upper Carboniferous of NW Germany
Creators: name: Greve, Jonas
name: Busch, Benjamin
name: Quandt, Dennis
name: Knaak, Mathias
name: Hilgers, Christoph
Publisher: name: Geological Society of London
Year: 2024
Subjects: classificationCode: 3705
subject: Geology
subject: FOS: Earth and related environmental sciences

description: Supplementary Material 1.
On Equilibrium Dynamics of Spin-Glass Systems
Creators: name: Crisanti, A.
name: Leuzzi, L.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We present a critical analysis of the Sompolinsky theory of equilibrium dynamics. By using the spherical $2+p$ spin glass model we test the asymptotic static limit of the Sompolinsky solution showing that it fails to yield a thermodynamically stable solution. We then present an alternative formulation, based on the Crisanti, Hörner and Sommers [Z. für Physik {\bf 92}, 257 (1993)] dynamical solution of the spherical $p$-spin spin glass model, reproducing a stable static limit that coincides, in the case of a one step Replica Symmetry Breaking Ansatz, with the solution at the dynamic free energy threshold at which the relaxing system gets stuck off-equilibrium. We formally extend our analysis to any number of Replica Symmetry Breakings $R$. In the limit $R\to\infty$ both formulations lead to the Parisi anti-parabolic differential equation. This is the special case, though, where no dynamic blocking threshold occurs. The new formulation does not contain the additional order parameter $Δ$ of the Sompolinsky theory.
description: 24 pages, 6 figures
Analytical and numerical studies of fluid instabilities in relativistic jets
Creators: name: Perucho, M.
name: Lobanov, A. P.
name: Marti, J. M.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Relativistic outflows represent one of the best-suited tools to probe the physics of AGN. Numerical modelling of internal structure of the relativistic outflows on parsec scales provides important clues about the conditions and dynamics of the material in the immediate vicinity of the central black holes in AGN. We investigate possible causes of the structural patterns and regularities observed in the parsec-scale jet of the well known quasar 3C 273. We compare the model with the radio structure observed in 3C 273 on parsec scales using very long baseline interferometry (VLBI) and constrain the basic properties of the flow. Our results show that Kelvin-Helmholtz instabilities are the most plausible mechanism to generate the observed structures.
description: Proceedings of Relativistic Astrophysics & Cosmology (Munchen, November 2005). 3 pages
Ανάπτυξη Πληροφοριακού Συστήματος Διαχείρισης Δεδομένων Δάσους Ταξιάρχη:
Creators: name: Νταής, Γεώργιος Αθανασίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2012
Subjects: Πληροφοριακό σύστημα Δάσους Ταξιάρχη – Βραστάμων
Σύγχρονα λειτουργικά συστήματα
Όγκος περιβαλλοντικών δεδομένων
Information System of Taxiarxi-Vrastamon Forest
Modern operating systems
Volume of environmental data

description: Η παρούσα εργασία πραγματοποιήθηκε για να σχηματίσουμε και να δημιουργήσουμε το πληροφοριακό σύστημα διαχείρισης δεδομένων του Δάσους Ταξιάρχη - Βραστάμων έτσι ώστε να προσφέρουμε στο κάθε χρήστη - επισκέπτη την δυνατότητα παροχής νέων δυνατοτήτων στην έρευνα, επίσκεψη και διαχείριση της περιοχής, μέσα από το συνδυασμό σύγχρονων λειτουργικών συστημάτων χρησιμοποιώντας και συνδυάζοντας μεγάλο όγκο δεδομένων - πληροφοριών που αφορούν περιβαλλοντικά και διαχειριστικά θέματα. Προϋπόθεση για την διασφάλισης του οικοσυστήματος και του δάσους ειδικότερα, επιβάλλεται ο εμπλουτισμός του πληροφοριακού συστήματος με νέα δεδομένα και πληροφορίες που θα συγκεντρωθούν από νέες έρευνες και μελέτες που θα πραγματοποιηθούν στην περιοχή.
description: The present work was to form and create the data management information system of the Forest Τaxiarxi- Brastamwn so we offer to each guest users the ability to provide new capabilities in research, visit and management of the area,through the combination of modern operating systems using and combining large amounts of data - information relating to environmental and management issues. Condition for safeguarding the forest ecosystem and in particular,should enrich the information system with new data and information gathered from new surveys and studies to be conducted in the region.
Bayesian statistical analysis of hydrogeochemical data using point processes: a new tool for source detection in multicomponent fluid mixtures
Creators: name: Reype, Christophe
name: Richard, Antonin
name: Deaconu, Madalina
name: Stoica, Radu
Publisher: name: arXiv
Year: 2020
Subjects: subject: Methodology (stat.ME)
subject: FOS: Computer and information sciences

description: Hydrogeochemical data may be seen as a point cloud in a multi-dimensional space. Each dimension of this space represents a hydrogeochemical parameter (i.e. salinity, solute concentration, concentration ratio, isotopic composition...). While the composition of many geological fluids is controlled by mixing between multiple sources, a key question related to hydrogeochemical data set is the detection of the sources. By looking at the hydrogeochemical data as spatial data, this paper presents a new solution to the source detection problem that is based on point processes. Results are shown on simulated and real data from geothermal fluids.
On the hydrogen neutral outflowing disks of B[e] supergiants
Creators: name: Kraus, Michaela
name: Fernandes, Marcelo Borges
name: de Araujo, Francisco X.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: (abridged) B[e] supergiants are known to possess geometrically thick dusty disks. Disk-forming wind models have, however, been found to be insufficient in reproducing the observed dust emission. This problem arises due to the severe assumption that, as for classical Be stars, the near-infrared excess emission originates in the disk. Modeling of the free-free and free-bound emission therefore results in an upper limit for the disk mass loss rate, hampering dust condensation in the disk. We propose a revised scenario for the non-spherical winds of B[e] supergiants: a normal B-type line-driven polar wind and an outflowing disk-forming wind that is neutral in hydrogen at, or very close to the stellar surface. We concentrate on the pole-on seen LMC B[e] supergiant R126 and calculate the line luminosities of the optical [OI] emission lines with an outflowing disk scenario. In addition, we compute the free-free and free-bound emission from a line-driven polar wind and model the spectral energy distribution in the optical and near-infrared. Good fits to the [OI] line luminosities are achieved for an outflowing disk that is neutral in hydrogen right from the stellar surface. Neutral thereby means that hydrogen is ionized by less than 0.1%. Consequently, the free-free and free-bound emission cannot (dominantly) arise from the disk and cannot limit the disk mass loss rate. The hydrogen neutral outflowing disk scenario therefore provides an ideal environment for efficient dust formation. The spectral energy distribution in the optical and near-infrared range can be well fitted with the stellar continuum plus free-free and free-bound emission from the polar line-driven wind. Our modeling further delivers minimum values for \dot{M}(disk) > 2.5d-5 M_sun/yr and for the density contrast between equatorial and polar wind of ~10.
description: 9 pages, 8 figures, accepted for publication in A&A
A well-tempered density functional theory of electrons in molecules
Creators: name: Livshits, Ester
name: Baer, Roi
Publisher: name: arXiv
Year: 2007
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Reporting extensions of a recently developed approach to density functional theory with correct long-range be-havior (Phys. Rev. Lett. 94, 043002 (2005)). The central quantities are a splitting functional gamma[n] and a complementary exchange-correlation functional. We give a practical method for determining the value of γin molecules, assuming an approximation for XC energy is given. The resulting theory shows good ability to reproduce the ionization potentials for various molecules. However it is not of sufficient accuracy for forming a satisfactory framework for studying molecular properties. A somewhat different approach is then adopted, which depends on a density-independent γand an additional parameter w eliminating part of the local exchange functional. The values of these two parameters are obtained by best-fitting to experimental atomization energies and bond-lengths of the molecules in the G2(1) database. The optimized values are gamma=0.5 a_0^{-1} and w=0.1 . We then examine the performance of this slightly semi-empirical functional for a variety of molecular properties, comparing to related works and to experiment. We show that this approach can be used for describing in a satisfactory manner a broad range of molecular properties, be they static or dynamic. Most satisfactory is the ability to describe valence, Rydberg and inter-molecular charge-transfer excitations.
The divergence and curl in arbitrary basis
Creators: name: de Medeiros, Waleska P. F.
name: de Lima, Rodrigo R.
name: de Andrade, Vanessa C.
name: Müller, Daniel
Publisher: name: arXiv
Year: 2020
Subjects: subject: Classical Physics (physics.class-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: In this work, the divergence and curl operators are obtained using the coordinate free non rigid basis formulation of differential geometry. Although the authors have attempted to keep the presentation self-contained as much as possible, some previous exposure to the language of differential geometry may be helpful. In this sense the work is aimed to late undergraduate or beginners graduate students interested in mathematical physics. To illustrate the development, we graphically present the eleven coordinate systems in which the Laplace operator is separable. We detail the development of the basis and the connection for the cylindrical and paraboloidal coordinate systems. We also present in [1] codes both in Maxima and Maple for the spherical orthonormal basis, which serves as a working model for calculations in other situations of interest. Also in [1] the codes to obtain the coordinate surfaces are given.
Highly photon loss tolerant quantum computing using hybrid qubits
Creators: name: Omkar, S.
name: Teo, Y. S.
name: Lee, Seung-Woo
name: Jeong, H.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We investigate a scheme for topological quantum computing using optical hybrid qubits and make an extensive comparison with previous all-optical schemes. We show that the photon loss threshold reported by Omkar {\it et al}. [Phys. Rev. Lett. 125, 060501 (2020)] can be improved further by employing postselection and multi-Bell-state-measurement based entangling operation to create a special cluster state, known as Raussendorf lattice for topological quantum computation. In particular, the photon loss threshold is enhanced up to $5.7\times10^{-3}$, which is the highest reported value given a reasonable error model. This improvement is obtained at the price of consuming more resources by an order of magnitude, compared to the scheme in the aforementioned reference. Neverthless, this scheme remains resource-efficient compared to other known optical schemes for fault-tolerant quantum computation.
description: 12 pages, 8 figures
Elastically Relaxed Free-standing Strained-Si Nanomembranes
Creators: name: Roberts, Michelle M.
name: Klein, Levente J.
name: Savage, Don E.
name: Slinker, Keith A.
name: Friesen, Mark
name: Celler, George
name: Eriksson, Mark A.
name: Lagally, Max G.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Strain plays a critical role in the properties of materials. In silicon and silicon-germanium, strain provides a mechanism for control of both carrier mobility and band offsets. In materials integra-tion, strain is typically tuned through the use of dislocations and elemental composition. We demonstrate a versatile method to control strain, by fabricating membranes in which the final strain state is controlled by elastic strain sharing, i.e., without the formation of defects. We grow Si/SiGe layers on a substrate from which they can be released, forming nanomembranes. X-ray diffraction measurements confirm a final strain predicted by elasticity theory. The effec-tiveness of elastic strain to alter electronic properties is demonstrated by low-temperature longi-tudinal-Hall effect measurements on a strained-Si quantum well before and after release. Elastic strain sharing and film transfer offers an intriguing path towards complex, multiple-layer struc-tures in which each layer's properties are controlled elastically, without the introduction of unde-sirable defects.
description: 8 pages, published version
Process of change during play and art therapy
Creators: name: Reeves, Jocelyn Diane
Publisher: name: University of British Columbia
Year: 2009

description: This retrospective study explored the life experience of a child with conduct disorder. The nature of the child's primary attachment pattern and re-attachment was explored over a two year period. The case study approach was employed, utilizing the participant-observation and interviewing techniques for collecting data. The intention was to explain and influence the attachment pattern of the child in the study. Specifically, the intention was for the child to develop a more positive internal working model of himself through creating a therapeutic environment where a secure attachment could be formed. The process of change the child went through, as depicted through his play and art, indicated that significant change occurred in his attachment pattern over the two year therapeutic period. The child's behavioural and interpersonal patterns went from being negative, oppositional, and aggressive to being more positive, compliant, and controlled. The nature of the therapeutic relationship, including the phases of the therapeutic process both in terms of play and art, are presented. As well, implications for special education teachers and school counsellors involved with this type of child are suggested.
The influence of sedimentary facies, mineralogy, and diagenesis on reservoir properties of the coal-bearing Upper Carboniferous of NW Germany
Creators: name: Greve, Jonas
name: Busch, Benjamin
name: Quandt, Dennis
name: Knaak, Mathias
name: Hilgers, Christoph
Publisher: name: Geological Society of London
Year: 2024
Subjects: classificationCode: 3705
subject: Geology
subject: FOS: Earth and related environmental sciences

description: Supplementary Material 2.
The effect of the centrifugal acceleration on period spacings of gravito-inertial modes in intermediate-mass stars
Creators: name: Henneco, Jan
name: Van Reeth, Timothy
name: Prat, Vincent
name: Mathis, Stéphane
name: Mombarg, Joey S. G.
name: Aerts, Conny
Publisher: name: arXiv
Year: 2021
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The Kepler and TESS missions delivered high-precision, long-duration photometric time series for hundreds of main-sequence stars with gravito-inertial (g) pulsation modes. This high precision allows us to evaluate increasingly detailed theoretical stellar models. Recent theoretical work extended the traditional approximation of rotation (TAR), a framework to evaluate the effect of the Coriolis acceleration on g-modes, to include the effects of the centrifugal acceleration in the approximation of slightly deformed stars, which so far had mostly been neglected in asteroseismology. This extension of the TAR was conceived by rederiving the TAR in a centrifugally deformed, spheroidal coordinate system. We explore the effect of the centrifugal acceleration on g modes and assess its detectability in space-based photometry. We implement the new framework to calculate the centrifugal deformation of precomputed 1D spherical stellar structure models and compute the corresponding g-mode frequencies, assuming uniform rotation. The framework is evaluated for a grid of stellar structure models covering a relevant parameter space for observed g-mode pulsators. The centrifugal acceleration modifies the effect of the Coriolis acceleration on g modes, narrowing the equatorial band in which they are trapped. Furthermore, the centrifugal acceleration causes the pulsation periods and period spacings of the most common g modes (prograde dipole modes and r modes) to increase with values similar to the observational uncertainties in Kepler and TESS data. The effect of the centrifugal acceleration on g~modes is formally detectable in modern space photometry. Implementation of the new theoretical framework in stellar structure and pulsation codes will allow for more precise asteroseismic modelling of centrifugally deformed stars, to assess its effect on mode excitation, -trapping and -damping.
description: 14 pages, 14 figures, 1 table. Resubmitted to A&A after a positive referee report
Detection of M31 Binaries via High-Cadence Pixel-Lensing Surveys
Creators: name: Kim, D.
name: Chung, S. -J.
name: Darnley, M. J.
name: Duke, J. P.
name: Gould, A.
name: Han, C.
name: Ibrahimov, M. A.
name: Im, M.
name: Jeon, Y. -B.
name: Karimov, R. G.
name: Kerins, E.
name: Lee, C. -U.
name: Newsam, A.
name: Park, B. -G.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The Angstrom Project is using a distributed network of two-meter class telescopes to conduct a high cadence pixel-lensing survey of the bulge of the Andromeda Galaxy (M31). With the expansion of global telescope network, the detection efficiency of pixel-lensing surveys is rapidly improving. In this paper, we estimate the detection rate of binary lens events expected from high-cadence pixel-lensing surveys toward M31 such as the Angstrom Project based on detailed simulation of events and application of realistic observational conditions. Under the conservative detection criteria that only high signal-to-noise caustic-crossing events with long enough durations between caustic crossings can be firmly identified as binary lens events, we estimate that the rate would be $Γ_{\rm b}\sim (7-15)f_{\rm b}(N/50)$ per season, where $f_{\rm b}$ is the fraction of binaries with projected separations of $10^{-3} {\rm AU}
description: 6 pages, 4 figures
Green's function for second order parabolic equations with singular lower order coefficients
Creators: name: Kim, Seick
name: Xu, Longjuan
Publisher: name: arXiv
Year: 2020
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics

description: We construct Green's functions for second order parabolic operators of the form $Pu=\partial_t u-{\rm div}({\bf A} \nabla u+ \boldsymbol{b}u)+ \boldsymbol{c} \cdot \nabla u+du$ in $(-\infty, \infty) \times Ω$, where $Ω$ is an open connected set in $\mathbb{R}^n$. It is not necessary that $Ω$ to be bounded and $Ω= \mathbb{R}^n$ is not excluded. We assume that the leading coefficients $\bf A$ are bounded and measurable and the lower order coefficients $\boldsymbol{b}$, $\boldsymbol{c}$, and $d$ belong to critical mixed norm Lebesgue spaces and satisfy the conditions $d-{\rm div} \boldsymbol{b} \ge 0$ and ${\rm div}(\boldsymbol{b}-\boldsymbol{c}) \ge 0$. We show that the Green's function has the Gaussian bound in the entire $(-\infty, \infty) \times Ω$.
description: 20 pages
Συμπεριφορά μαθητών δευτεροβάθμιας εκπαίδευσης ως προς την κατανάλωση τροφίμων στο σχολείο:
Creators: name: Καρακατσάνη, Κυριακή Νικολάου
Publisher: name: Aristotle University of Thessaloniki
Year: 2012
Subjects: Συμπεριφορά μαθητών δευτεροβάθμιας εκπαίδευσης
Κατανάλωση τροφίμων
Σχολείο
High school students’ behavior
Food consumption
School

description: Η συγκεκριμένη εργασία μελετάει τις διατροφικές συνήθειες μαθητών Δευτεροβάθμιας Εκπαίδευσης ως προς την κατανάλωση τροφίμων στο σχολείο. Ενώ η διατροφή των παιδιών έχει διερευνηθεί εκτενώς, περιορισμένα είναι τα διαθέσιμα στοιχεία που αφορούν τις διατροφικές συνήθειες των παιδιών στο σχολείο. Σκοπός της έρευνας είναι να διερευνηθούν οι απόψεις και οι συνήθειες των μαθητών για την διατροφή τους στο σχολείο. Η έρευνα βασίζεται σε πρωτογενή δεδομένα που συλλέχτηκαν από 276 μαθητές του πολεοδομικού συγκροτήματος Θεσσαλονίκης. Η μέθοδος συλλογής των στοιχείων είναι το ερωτηματολόγιο που προέκυψε με την βοήθεια των στοιχείων της έρευνας που προηγήθηκε στην οποία συμμετείχαν 3 ομάδες εστίασης , που αποτελούνταν από 6 άτομα η κάθε μία. Τα αποτελέσματα δείχνουν ότι οι περισσότεροι μαθητές του δείγματος καταναλώνουν πρωινό καθώς και δεκατιανό (ή πρόγευμα) κατά την διάρκεια του σχολείου. Το μεγαλύτερο ποσοστό συνήθως παίρνει φαγητό για το σχολείο από το σπίτι και προτιμούν κυρίως τα είδη άρτου , τους χυμούς , τις διάφορες σφολιάτες και τα κρουασάν. Τα συμπεράσματα και οι προτάσεις αφορούν τους γονείς, το σχολείο, τους εκπαιδευτικούς καθώς και την πολιτεία ώστε να βοηθήσουν τους μαθητές στην απόκτηση και υιοθέτηση υγιεινών διατροφικών συνηθειών.
description: The following summary speaks about the dietary habits of pupils in secondary school and their food consumption. While a dietary habit of children has been fully searched, limited information is available relating children’s dietary habits in school. The purpose of this investigation is to investigate the views and habits of students during school time. The survey is based on primary data that was collected from 276 students in a developmental group in Thessaloniki. The method of the collection of the data and its questionnaire was reached by the help of the elements of research that proceeded by 3 focus groups, each consisting of 6 people. The results show that most students prefer and are required to have brunch (or breakfast) and also lunch during the school hours. The largest rates of pupils usually bring food from their own houses and mainly prefer food such as different types of breads, juice, a variety of pies, and also croissants. The following conclusions and recommendations concern parents, the school, teachers and the state in order. For that reason, everyone together is trying to help students in obtaining the adoption of a healthy dietary habit in and out of school.
Discrepancy between hadron matter and quark-gluon matter in net charge transfer fluctuation
Creators: name: Zhou, Dai-Mei
name: Li, Xiao-Mei
name: Dong, Bao-Guo
name: Sa, Ben-Hao
Publisher: name: arXiv
Year: 2006
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: A parton and hadron cascade model, PACIAE, is employed to investigate the net charge transfer fluctuation within $|η|$=1 in Au+Au collisions at $\sqrt{s_{NN}}$=200 GeV. It is turned out that the observable of net charge transfer fluctuation, $κ$, in hadronic final state (HM) is nearly a factor of 3 to 5 larger than that in initial partonic state (QGM). However, only twenty percent of the net charge transfer fluctuation in the QGM can survive the hadronization
description: 7pages, 3figures