cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Variable Selection in Kernel Regression Using Measurement Error Selection Likelihoods
Creators: name: White, Kyle R.
name: A. Stefanski, Leonard
name: Wu, Yichao
Publisher: name: Taylor & Francis
Year: 2017
Subjects: subject: Medicine
subject: Genetics
subject: FOS: Biological sciences
subject: Neuroscience
subject: Evolutionary Biology
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Sociology
subject: FOS: Sociology
subject: 19999 Mathematical Sciences not elsewhere classified
subject: FOS: Mathematics
subject: Cancer
subject: Plant Biology

description: This article develops a nonparametric shrinkage and selection estimator via the measurement error selection likelihood approach recently proposed by Stefanski, Wu, and White. The measurement error kernel regression operator (MEKRO) has the same form as the Nadaraya–Watson kernel estimator, but optimizes a measurement error model selection likelihood to estimate the kernel bandwidths. Much like LASSO or COSSO solution paths, MEKRO results in solution paths depending on a tuning parameter that controls shrinkage and selection via a bound on the harmonic mean of the pseudo-measurement error standard deviations. We use small-sample-corrected AIC to select the tuning parameter. Large-sample properties of MEKRO are studied and small-sample properties are explored via Monte Carlo experiments and applications to data. Supplementary materials for this article are available online.
Magnetic and electrical properties of (Pu,Lu)Pd3
Creators: name: Le, M. D.
name: McEwen, K. A.
name: Colineau, E.
name: Griveau, J. -C.
name: Eloirdi, R.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We present measurements of the magnetic susceptibility, heat capacity and electrical resistivity of Pu$_{1-x}$Lu$_x$Pd$_3$, with $x$=0, 0.1, 0.2, 0.5, 0.8 and 1. PuPd$_3$ is an antiferromagnetic heavy fermion compound with $T_N=24$~K. With increasing Lu doping, both the Kondo and RKKY interaction strengths fall, as judged by the Sommerfeld coefficient $γ$ and Néel temperature $T_N$. Fits to a crystal field model of the resistivity also support these conclusions. The paramagnetic effective moment $μ_{\mathrm{eff}}$ increases with Lu dilution, indicating a decrease in the Kondo screening. In the highly dilute limit, $μ_{\mathrm{eff}}$ approaches the value predicted by intermediate coupling calculations. In conjunction with an observed Schottky peak at $\sim$60~K in the magnetic heat capacity, corresponding to a crystal field splitting of $\sim$12~meV, a mean-field intermediate coupling model with nearest neighbour interactions has been developed.
description: 13 pages, 13 figures
Statistical tests for large tree-structured data
Creators: name: Bharath, Karthik
name: Kambadur, Prabhanjan
name: Dey, Dipak. K.
name: Rao, Arvind
name: Baladandayuthapani, Veerabhadran
Publisher: name: Taylor & Francis
Year: 2016
Subjects: subject: Medicine
subject: Genetics
subject: FOS: Biological sciences
subject: Neuroscience
subject: Pharmacology
subject: Biotechnology
subject: 19999 Mathematical Sciences not elsewhere classified
subject: FOS: Mathematics
subject: Cancer
subject: Plant Biology

description: We develop a general statistical framework for the analysis and inference of large tree-structured data, with a focus on developing asymptotic goodness-of-fit tests. We first propose a consistent statistical model for binary trees, from which we develop a class of invariant tests. Using the model for binary trees, we then construct tests for general trees by using the distributional properties of the Continuum Random Tree, which arises as the invariant limit for a broad class of models for tree-structured data based on conditioned Galton–Watson processes. The test statistics for the goodness-of-fit tests are simple to compute and are asymptotically distributed as χ2 and F random variables. We illustrate our methods on an important application of detecting tumour heterogeneity in brain cancer. We use a novel approach with tree-based representations of magnetic resonance images and employ the developed tests to ascertain tumor heterogeneity between two groups of patients.
Deconfinement and chiral restoration in nonlocal PNJL models at zero and imaginary chemical potential
Creators: name: Pagura, V.
name: Dumm, D. Gomez
name: Scoccola, N. N.
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We study the deconfinement and chiral restoration transitions in the context of non-local PNJL models, considering the impact of the presence of dynamical quarks on the scale parameter appearing in the Polyakov potential. We show that the corresponding critical temperatures are naturally entangled for both zero and imaginary chemical potential, in good agreement with lattice QCD results. We also analyze the Roberge Weiss transition, which is found to be first order at the associated endpoint.
description: 13 pages, 5 figures
HeFDI Code School: Sustainable Research Software - Continuous Integration and Test Driven Development
Creators: name: Linxweiler, Jan
name: Schwarzmeier, Moritz
name: Peters, Sören
name: Marcus, Sven
Publisher: name: Zenodo
Year: 2023

description: Continuous Integration (CI) and Test-driven development (TDD) are two software development practices that complement each other and can be used together to improve the quality and efficiency of software development.

CI is a development practice that emphasizes integrating and testing code changes frequently in a shared repository. The goal is to catch bugs and issues early in the development process before they become more difficult and expensive to fix.

TDD, on the other hand, is a development approach that emphasizes writing automated tests before writing the code. The developer writes a failing test, then writes the code to make the test pass, and finally refactors the code to improve its quality. This cycle is repeated for each new feature or change to the code.

When used together, CI and TDD can help to ensure that the code is always in a functional and deployable state and that any issues or bugs are caught early in the development process.
Optimal trapping wavelengths of Cs$_2$ molecules in an optical lattice
Creators: name: Véxiau, Romain
name: Bouloufa, Nadia
name: Aymar, Mireille
name: Danzl, Johann Georg
name: Mark, Manfred J
name: Naegerl, Hans-Christoph
name: Dulieu, Olivier
Publisher: name: arXiv
Year: 2011
Subjects: subject: Quantum Physics (quant-ph)
subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: The present paper aims at finding optimal parameters for trapping of Cs$_2$ molecules in optical lattices, with the perspective of creating a quantum degenerate gas of ground-state molecules. We have calculated dynamic polarizabilities of Cs$_2$ molecules subject to an oscillating electric field, using accurate potential curves and electronic transition dipole moments. We show that for some particular wavelengths of the optical lattice, called "magic wavelengths", the polarizability of the ground-state molecules is equal to the one of a Feshbach molecule. As the creation of the sample of ground-state molecules relies on an adiabatic population transfer from weakly-bound molecules created on a Feshbach resonance, such a coincidence ensures that both the initial and final states are favorably trapped by the lattice light, allowing optimized transfer in agreement with the experimental observation.
HeFDI Code School: Sustainable Research Software - Continuous Integration and Test Driven Development
Creators: name: Linxweiler, Jan
name: Gläser, Dennis
name: Schwarzmeier, Moritz
name: Peters, Sören
Publisher: name: Zenodo
Year: 2023

description: Continuous Integration (CI) and Test-driven development (TDD) are two software development practices that complement each other and can be used together to improve the quality and efficiency of software development. CI is a development practice that emphasizes integrating and testing code changes frequently in a shared repository. The goal is to catch bugs and issues early in the development process before they become more difficult and expensive to fix. TDD, on the other hand, is a development approach that emphasizes writing automated tests before writing the code. The developer writes a failing test, then writes the code to make the test pass, and finally refactors the code to improve its quality. This cycle is repeated for each new feature or change to the code. When used together, CI and TDD can help to ensure that the code is always in a functional and deployable state and that any issues or bugs are caught early in the development process.
Ο Δημήτρης Γληνός (1882-1943): Η ζωή και το έργο του
Creators: name: Γιαννακόπουλος, Ιωάννης
Publisher: name: Πανεπιστήμιο Πελοποννήσου
Year: 2024
Subjects: subject: Γληνός , Δημήτριος Α. , 1882-1943
subject: Εκπαιδευτικοί -- Ελλάδα -- Βιογραφία
subject: Εκπαίδευση -- Ελλάδα -- Ιστορία -- 20ός αιώνας
subject: Γληνός
subject: Εκπαίδευση
subject: Πολιτική
subject: Σοσιαλισμός
subject: Ιστορισμός
subject: Ανωτέρα Γυναικεία Σχολή
subject: Glinos
subject: Education
subject: Politics
subject: Socialism
subject: Historicism
subject: Higher Women's School

description: Ο Δημήτρης Γληνός υπήρξε ένας από τους σημαντικότερους Έλληνες διανοούμενους του 20ού αιώνα, αφήνοντας ανεξίτηλο στίγμα στην ελληνική παιδεία, την πολιτική σκηνή και τη λογοτεχνία. Ως εκπαιδευτικός, ενθάρρυνε την κριτική σκέψη και πνευματική ανάπτυξη των μαθητών του. Στην πολιτική, αγωνίστηκε για την ελευθερία και τη δικαιοσύνη, προσφέροντας φωνή στους αποκλεισμένους. Η πολιτική του δράση προκάλεσε αντιδράσεις, εγκαταλείποντας τη Σμύρνη το 1908 και συνεχίζοντας τις σπουδές του στη Γερμανία. Το 1927 υποστήριξε ανοιχτά τις σοσιαλιστικές ιδέες, το 1934 επισκέφθηκε την ΕΣΣΔ και το 1935 εξορίζεται. Ο Γληνός αφήνει πίσω του ένα πλούσιο κληροδότημα που συνεχίζει να εμπνέει μελλοντικούς ηγέτες και πολιτικούς.
Holographic quantum states
Creators: name: Osborne, Tobias J.
name: Eisert, Jens
name: Verstraete, Frank
Publisher: name: arXiv
Year: 2010
Subjects: subject: Quantum Physics (quant-ph)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We show how continuous matrix product states of quantum field theories can be described in terms of the dissipative non-equilibrium dynamics of a lower-dimensional auxiliary boundary field theory. We demonstrate that the spatial correlation functions of the bulk field can be brought into one-to-one correspondence with the temporal statistics of the quantum jumps of the boundary field. This equivalence: (1) illustrates an intimate connection between the theory of continuous quantum measurement and quantum field theory; (2) gives an explicit construction of the boundary field theory allowing the extension of real-space renormalization group methods to arbitrary dimensional quantum field theories without the introduction of a lattice parameter; and (3) yields a novel interpretation of recent cavity QED experiments in terms of quantum field theory, and hence paves the way toward observing genuine quantum phase transitions in such zero-dimensional driven quantum systems.
description: 6 pages, 1 figure. Emphasis changed
Collective motion of active Brownian particles in one dimension
Creators: name: Romanczuk, Pawel
name: Erdmann, Udo
Publisher: name: arXiv
Year: 2010
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We analyze a model of active Brownian particles with non-linear friction and velocity coupling in one spatial dimension. The model exhibits two modes of motion observed in biological swarms: A disordered phase with vanishing mean velocity and an ordered phase with finite mean velocity. Starting from the microscopic Langevin equations, we derive mean-field equations of the collective dynamics. We identify the fixed points of the mean-field equations corresponding to the two modes and analyze their stability with respect to the model parameters. Finally, we compare our analytical findings with numerical simulations of the microscopic model.
description: submitted to Eur. Phys J. Special Topics
Η δολοφονία του Ιωάννη Καποδίστρια στο Ναύπλιο (1831)
Creators: name: Χατζόπουλος, Δημήτριος
Publisher: name: Πανεπιστήμιο Πελοποννήσου
Year: 2024
Subjects: subject: Καποδίστριας , Ιωάννης Αντωνίου , 1776-1831 -- Δολοφονία
subject: Πολιτικοί -- Ελλάδα -- Βιογραφία
subject: Ελλάδα -- Πολιτική και διακυβέρνηση -- 1821-1832
subject: Ελλάδα -- Ιστορία -- 1821-
subject: Ιωάννης Καποδίστριας
subject: Δολοφονία
subject: Ναύπλιο
subject: Κυβερνήτης
subject: Μαυρομιχαλαίοι
subject: Αντιπολίτευση
subject: 1831
subject: Συνωμοσία
subject: Μεγάλες Δυνάμεις
subject: Ioannis Kapodistrias
subject: Assassination
subject: Nafplio
subject: Governor
subject: Mavromichalaioi
subject: Opposition
subject: Conspiracy
subject: Great Powers

description: Η παρούσα εργασία αναλύει τη δολοφονία του Ιωάννη Καποδίστρια, εξετάζοντας τα γεγονότα πριν και μετά το συμβάν. Αναφέρονται, η εκλογή και έλευση του Κυβερνήτη, καθώς και το αναπτυξιακό του πρόγραμμα, το οποίο προκάλεσε τη δυσφορία αυτών που υπονόμευε. Τα μέτρα του σε συνδυασμό με την πολιτική ιδιοσυγκρασία και «ρωσική αυταρχικότητά» του, προκάλεσαν έντονη αντιπολίτευση, η οποία υπό το πέπλο της συνταγματικής ελευθερίας επιχείρησε να επιβάλει τα συμφέροντά της. Η συνομωσία της δολοφονίας και οι ηθικοί αυτουργοί παραμένουν μυστήριο, όπου οι ενδείξεις των ερευνών μας επιτρέπουν μόνο να εικάζουμε. Η πρώτη πολιτική δολοφονία χάραξε ανεξίτηλα τον Καποδίστρια στην ελληνική συλλογική μνήμη.
The Design and Analysis for the Icing Wind Tunnel Experiment of a New Deicing Coating
Creators: name: Li, Xiaodong
name: He, Xu
name: He, Yuanzhen
name: Zhang, Hui
name: Zhang, Zhong
name: K. J. Lin, Dennis
Publisher: name: Taylor & Francis
Year: 2018
Subjects: subject: Space Science
subject: Neuroscience
subject: Pharmacology
subject: Biotechnology
subject: Immunology
subject: FOS: Clinical medicine
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: Science Policy
subject: 110309 Infectious Diseases
subject: FOS: Health sciences

description: A new kind of deicing coating is developed to provide aircraft with efficient and durable protection from icing-induced dangers. The icing wind tunnel experiment is indispensable in confirming the usefulness of a deicing coating. Due to the high cost of each batch relative to the available budget, an efficient design of the icing wind tunnel experiment is crucial. The challenges in designing this experiment are multi-fold. It involves between-block factors and within-block factors, incomplete blocking with random effects, related factors, hard-to-change factors, and nuisance factors. Traditional designs and theories cannot be directly applied. To overcome these challenges, we propose using a step-by-step design strategy that includes applying a cross array structure for between-block factors and within-block factors, a group of balanced conditions for optimizing incomplete blocking, a run order method to achieve the minimum number of level changes for hard-to-change factors, and a zero aliased matrix for the nuisance factors. New (theoretical) results for D-optimal design of incomplete blocking experiments with random block effects and minimum number of level changes are obtained. Results of the experiments show that this novel deicing coating is promising in offering both high efficiency of ice reduction and a long service lifetime. The methodology proposed here is generalizable to other applications that involve nonstandard design problems. Supplementary materials for this article are available online.
Ο ρωσοτουρκικός πόλεμος (1876-1878) και οι συνθήκες του Αγίου Στεφάνου και του Βερολίνου (1878)
Creators: name: Κωστούλας, Χρήστος
Publisher: name: Πανεπιστήμιο Πελοποννήσου
Year: 2024
Subjects: subject: Ρωσοτουρκικός Πόλεμος, 1787-1792
subject: Συνθήκη του Αγίου Στεφάνου (1878)
subject: Συνθήκη του Βερολίνου (1878)
subject: Ανατολικό ζήτημα (Βαλκανικό)
subject: Ρωσία
subject: Οθωμανική Αυτοκρατορία
subject: Βουλγαρική Εξέγερση
subject: Μεγάλες Δυνάμεις
subject: Συνθήκη Του Αγίου Στεφάνου
subject: Συνθήκη Του Βερολίνου
subject: Ανεξαρτησία Βουλγαρίας
subject: Βαλκάνια
subject: Σερβία Και Μαυροβούνιο
subject: Russia
subject: Ottoman Empire
subject: Bulgarian Rebellion
subject: Great Powers
subject: Treaty Of St. Stephen
subject: Treaty Of Berlin
subject: Bulgarian Independence
subject: Balkans
subject: Serbia And Montenegro

description: Η εργασία αυτή εξετάζει τον Ρωσοτουρκικό πόλεμο του 1876-1878 και τις συνθήκες του Αγίου Στεφάνου και του Βερολίνου. Ξεκίνησε ως αντίδραση στη συστηματική καταπίεση των Χριστιανών στην Οθωμανική Αυτοκρατορία και εντάχθηκε στη γενικότερη τάση των Βαλκανικών λαών για ανεξαρτησία. Η ανάλυση επικεντρώνεται στις στρατιωτικές επιχειρήσεις και τις διπλωματικές διαπραγματεύσεις που οδήγησαν στη Συνθήκη του Αγίου Στεφάνου, η οποία δημιούργησε τη Μεγάλη Βουλγαρία, όμως με την αναθεώρησή της από τις Μεγάλες Δυνάμεις στο Συνέδριο του Βερολίνου το 1878 η έκταση της περιορίστηκε. Η Ελλάδα βγήκε κερδισμένη προσαρτώντας τη Θεσσαλία και μέρος της Ηπείρου το 1881, ολοκληρώνοντας το εθνικό της όραμα.
Excited electron-bubble states in superfluid helium-4: a time-dependent density functional approach
Creators: name: Mateo, David
name: Jin, Dafei
name: Barranco, Manuel
name: Pi, Martí
Publisher: name: arXiv
Year: 2010
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: We present a systematic study on the excited electron-bubble states in superfluid helium-4 using a time-dependent density functional approach. For the evolution of the 1P bubble state, two different functionals accompanied with two different time-development schemes are used, namely an accurate finite-range functional for helium with an adiabatic approximation for electron versus an efficient zero-range functional for helium with a real-time evolution for electron. We make a detailed comparison between the quantitative results obtained from the two methods, which allows us to employ with confidence the optimal method for suitable problems. Based on this knowledge, we use the finite-range functional to calculate the time-resolved absorption spectrum of the 1P bubble, which in principle can be experimentally determined, and we use the zero-range functional to real-time evolve the 2P bubble for several hundreds of picoseconds, which is theoretically interesting due to the break down of adiabaticity for this state. Our results discard the physical realization of relaxed, metastable 2P electron-bubbles
description: 16 pages, 12 figures
BUILDING MATH FAMILIARIZATION ACTIVITIES IN INTEGRATED ORIENT TO PROMOTE POSITIVE AND CREATIVE ACTIVITIES FOR PRESCHOOLERS IN THE NORTH MOUNTAIN OF VIETNAM
Creators: name: Tu, Hoang Thi
name: Nguyen Thi Đoan Trang
Publisher: name: Международный журнал гуманитарных и естественных наук
Year: 2021
Subjects: INTEGRATED TEACHING
MATH SYMBOLS‎
PRESCHOOL CHILDREN

description: One of the important contents in the preschool education program is the formation of mathematical symbols. Due to age characteristics, in order to help children understand and remember the initial knowledge of mathematics fully and accurately, building integrated activities is an effective and practical job.The article affirms that building integrated activities is a necessary task in the process of teaching preschool children to be familiar with mathematics; propose suggestions for preschool teachers to promote integration in teaching math in order to encourage the positivity and creativity of preschool children with the desire to contribute to improving teaching effectiveness in schools.
Correlation between flavour violating decay of long-lived slepton and tau in the coannihilation scenario with Seesaw mechanism
Creators: name: Kaneko, Satoru
name: Saito, Hiroki
name: Sato, Joe
name: Shimomura, Takashi
name: Vives, Oscar
name: Yamanaka, Masato
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We investigate flavour violating decays of the long-lived lightest slepton and the tau lepton in the coannihilation region of the Minimal Supersymmetric Standard Model with a Seesaw mechanism to generate neutrino masses. We consider a situation where the mass difference between the lightest neutralino, as the Lightest Supersymmetric particle (LSP), and the lightest slepton, as the Next-to-LSP, is smaller than the mass of tau lepton. In this situation, the lifetime of the lightest slepton is very long and it is determined by lepton flavour violating (LFV) couplings because the slepton mainly consists of the lighter stau and the flavour conserving 2-body decay is kinematically forbidden. We show that the lifetime can change many orders of magnitude by varying the Yukawa couplings entering the Seesaw mechanism. We also show that branching ratio of LFV tau decays are strongly correlated with the lightest slepton lifetime. Therefore the branching ratios of LFV tau decays can be determined or constrained by measuring the slepton lifetime at the LHC experiment.
description: 16 pages, 4 figures, 3 tables
Advancing the understanding of Android unlocking and usage
Creators: name: Qiu, Lina
Publisher: name: University of British Columbia
Year: 2018

description: Research efforts have been made towards creating mobile authentication systems to better serve users' concerns regarding usability and security. While previous works have revealed real world smartphone authentication usage patterns, several aspects still need to be explored. In this research, we fill some of these knowledge gaps, including how age influences smartphone use. To this end, we performed a two-month long field study on a diverse North American study pool (N = 137). We examined how smartphone usage correlates with users' ages, their choice of unlocking mechanisms (e.g., PIN vs. Pattern) and the types of activities they undertook while unlocking their phones. Study results reveal that there are indeed significant differences across age and unlocking mechanisms. For instance, older participants interacted significantly less-frequently with their devices, and for a significantly shorter amount of time each day. Fingerprint users had significantly more device sessions than other mechanism groups. In addition, we also observed that most participants regularly shared their devices with others, while they also likely underestimated the sensitivity of the data stored on them. Overall, these observations provide important messages for designers and developers of smartphone authentication systems.
Searching for light Dark Matter in heavy meson decays
Creators: name: Badin, Andriy
name: Petrov, Alexey A
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: Beauty and charm e+e- factories running at resonance thresholds have unique capabilities for studies of the production of light Dark Matter particles in the decays of B_q (D) meson pairs. We provide a comprehensive study of light Dark Matter production in heavy meson decays with missing energy in the final state, such as B_q (D^0) -> "missing energy" and B_q (D^0) -> γ+ "missing energy". We argue that such transitions can be studied at the current flavor factories (and future super-flavor factories) by tagging the missing-energy decays with B_q (D^0) decays "on the other side".
description: 30 pages, 5 figures, 3 tables; updated references; corrected misprints
[Begin. Folio l recto:] In noie dn̄i ih̄u cristi. Impr. cesar flauus [sic] iustianus … cupide legū iuuētuti. Incipit liber mpus... institutionus
Creators: name: [Unknown]
Publisher: name: [Basiliensi] : [Michahelem Wenssler]
Year: 2014

description: Capitals and paragraphs marks in red and blue ink.

 66 or 67 lines of commentary to a full column.

 Leaf 2 at beginning and 2 leaves at end lacking.
Enhancing Ionic Conductivity of Bulk Single Crystal Yttria-Stabilized Zirconia by Tailoring Dopant Distribution
Creators: name: Lee, Eunseok
name: Prinz, Friedrich B.
name: Cai, Wei
Publisher: name: arXiv
Year: 2010
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: We present an ab-initio based kinetic Monte Carlo model for ionic conductivity in single crystal yttria-stabilized zirconia. Ionic interactions are taken into account by combining density functional theory calculations and the cluster expansion method and are found to be essential in reproducing the effective activation energy observed in experiments. The model predicts that the effective energy barrier can be reduced by 0.15-0.25 eV by arranging the dopant ions into a super-lattice.
description: Submitted to Phys. Rev. Lett. on 8/3/2010 (in review)
Modeling forced outage in hydropower generating units for operations planning model
Creators: name: Agrawal, Abhishek
Publisher: name: University of British Columbia
Year: 2018

description: Unplanned outages of generating units, also known as forced outages, act as a source of operational uncertainty for hydropower companies like BC Hydro. Forced outages reduce plant availability and causes loss of system flexibility and revenues. A combination of both likelihood of occurrence (frequency) and severity of outage event (duration) truly represents the risks posed by forced outages. Energy studies, using simulation and optimization models, are carried out by utility companies to incorporate different sources of uncertainties and maximize benefits in multi-purpose, multi-reservoir systems. The Department of System Optimization at BC Hydro is developing new quantitative approaches to model uncertainty of forced outages in their operations planning models and system energy studies. In this thesis, statistical properties of forced outage datasets are quantified, and different algorithms to generate scenarios of forced outages are developed. The statistical analysis methods and scenario generation algorithms are applied for a major hydroelectric facility in the BC Hydro system having 10 generating units and results are presented. Time to Failure and Time to Repair for outage events were obtained and checked for annual trends, seasonality and correlations. Outages of units were also evaluated for homogeneity. The impacts of planned outage on forced outages were quantified and suitable probabilistic distributions were developed to represent frequency and duration of outages. Three different scenario generation algorithms were developed using Markov/Semi-Markov based processes and Monte Carlo Simulation. It was found that Semi-Markov based scenario generation algorithm that comprehensively accounts for impacts of planned outages on forced outages is best suited to generate scenarios of forced outages for energy studies and operational planning models.
Smectic layers reorientation with stripes and heliconical structure in surface stabilised ferroelectric liquid crystal
Creators: name: Kumar, S.
name: Choudhary, A.
name: Gangwar, L. K.
name: Singh, S. P.
name: Rajesh
name: Biradar, A. M.
Publisher: name: Taylor & Francis
Year: 2023
Subjects: subject: Biophysics
subject: Biochemistry
subject: Physical Sciences not elsewhere classified
subject: Cell Biology
subject: Chemical Sciences not elsewhere classified
subject: Immunology
subject: FOS: Clinical medicine
subject: Cancer

description: High-tilt angle ferroelectric liquid crystal material in surface stabilised geometry (SSFLC) is investigated for the smectic layer reorientation and its molecular dynamics by electro-optical and dielectric spectroscopy techniques. Smectic layer reorientation (5 o to 45 o) is obtained by controlled cooling rate and applying electric field in the vicinity of transition temperature from chiral nematic (N∗) to chiral smectic C (SmC∗) phase. After slow cooling down to room temperature, the stripe domain textures along the rubbing are observed with quasi-bistable states. Dielectric spectroscopy has revealed the unusual increment in the dielectric permittivity. A dielectric relaxation process at lower frequency than Goldstone mode with the increase in DC bias up to 2 V is observed in the sample cooled without any bias. This increment is found to be originated by the heliconical structure within the stripes which is seen in the optical textures recorded at the time of dielectric scan. However, this increment is not observed in the sample cooled under DC bias. Thus, there exist different phenomena in the high tilt angle SSFLC sample cooled in different conditions of DC bias; stripe domains, smectic layers reorientation, heliconical stricture and twisted structure within stripes which are significant to explore deeply in high-tilt angle ferroelectric liquid crystals.
Lattice Induced Frequency Shifts in Sr Optical Lattice Clocks at the $10^{-17}$ Level
Creators: name: Westergaard, Philip G.
name: Lodewyck, Jérôme
name: Lorini, Luca
name: Lecallier, Arnaud
name: Burt, Eric
name: Zawada, Michal
name: Millo, Jacques
name: Lemonde, Pierre
Publisher: name: arXiv
Year: 2011
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: We present a comprehensive study of the frequency shifts associated with the lattice potential for a Sr lattice clock. By comparing two such clocks with a frequency stability reaching $5\times 10^{-17}$ after a one hour integration time, and varying the lattice depth up to $U_0=900 \, E_r$ with $E_r$ being the recoil energy, we evaluate lattice related shifts with an unprecedented accuracy. We put the first experimental upper bound on the recently predicted frequency shift due to the magnetic dipole (M1) and electric quadrupole (E2) interactions. This upper bound is significantly smaller than the theoretical upper limit. We also give a new upper limit on the effect of hyperpolarizability with an improvement by more than one order of magnitude. Finally, we report the first observation of the vector and tensor shifts in a lattice clock. Combining these measurements, we show that all known lattice related perturbation will not affect the clock accuracy down to the $10^{-17}$ level, even for very deep lattices, up to $U_0=150\,E_r$.
Concerning your children.
Creators: name: National Catholic Welfare Conference. Social Action Department.
Publisher: name: University of Notre Dame
Year: 2023

description:
 Articles by Edgar Schmiedeler and others, reprinted from N.C.W.C. review, 1931, and Catholic Action, 1932-33.
 The parent education movement / Edgar Schmiedeler -- Religious education in the family / Edgar Schmiedeler -- The school age child / Mary E. Spencer -- The gang age / Paul H. Furfey -- The adolescent boy / Jerome Merwick -- The adolescent girl / Anna E. King.
 Catholic Action.
CDT as a scaling limit of matrix models
Creators: name: Ambjorn, Jan
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: It is shown that generalized CDT, the two-dimensional theory of quantum gravity, constructed as a scaling limit from so-called causal dynamical triangulations, can be obtained from a cubic matrix model. It involves taking a new scaling limit of matrix models, which is more natural from a classical point of view.
description: Based on a talk presented at the XXIII Marian Smoluchowski Symposium on Statistical Physics,"Random Matrices, Statistical Physics and Information Theory", Krakow, Poland, September 26-30, 2010. To appear in Acta Physica Polonica B, Vol 42, No 5 (2011)
MCMC for Imbalanced Categorical Data
Creators: name: Johndrow, James E.
name: Smith, Aaron
name: Pillai, Natesh
name: Dunson, David B.
Publisher: name: Taylor & Francis
Year: 2019
Subjects: subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: 80699 Information Systems not elsewhere classified
subject: FOS: Computer and information sciences
subject: 19999 Mathematical Sciences not elsewhere classified
subject: FOS: Mathematics
subject: Plant Biology

description: Many modern applications collect highly imbalanced categorical data, with some categories relatively rare. Bayesian hierarchical models combat data sparsity by borrowing information, while also quantifying uncertainty. However, posterior computation presents a fundamental barrier to routine use; a single class of algorithms does not work well in all settings and practitioners waste time trying different types of Markov chain Monte Carlo (MCMC) approaches. This article was motivated by an application to quantitative advertising in which we encountered extremely poor computational performance for data augmentation MCMC algorithms but obtained excellent performance for adaptive Metropolis. To obtain a deeper understanding of this behavior, we derive theoretical results on the computational complexity of commonly used data augmentation algorithms and the Random Walk Metropolis algorithm for highly imbalanced binary data. In this regime, our results show computational complexity of Metropolis is logarithmic in sample size, while data augmentation is polynomial in sample size. The root cause of this poor performance of data augmentation is a discrepancy between the rates at which the target density and MCMC step sizes concentrate. Our methods also show that MCMC algorithms that exhibit a similar discrepancy will fail in large samples—a result with substantial practical impact. Supplementary materials for this article are available online.
INCREASING STUDENT’S SELF-LEARNING ABILITY IN PRACTICING ENGLISH WITH THE SUPPORT OF INFORMATION TECHNOLOGY
Creators: name: Nguyen Quoc Thuy
name: Nguyen Thi Doan Trang
Publisher: name: Международный журнал гуманитарных и естественных наук
Year: 2021
Subjects: SELF-LEARNING ABILITY
EDMODO
PRACTICE ENGLISH

description: A self-learning is an indispensable form of learning that helps students get success in their studies. This article is aimed at students' self-learning ability in practicing English with the support of information technology, specifically the social learning network Edmodo. The survey was conducted with 256 non-English major students at the Thai Nguyen University of Education, Viet Nam. The research results show that self-learning ability is one of the main factors of the communicative method used in teaching foreign languages. The use of Edmodo has helped to improve students' self-learning ability, motivate them to actively learn and practise English in a responsible and effective way.
On Maxwell fluid with relaxation time and viscosity depending on the pressure
Creators: name: Karra, Satish
name: Průša, Vít
name: Rajagopal, K. R.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Numerical Analysis (math.NA)
subject: Mathematical Physics (math-ph)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 76A10

description: We study a variant of the well known Maxwell model for viscoelastic fluids, namely we consider the Maxwell fluid with viscosity and relaxation time depending on the pressure. Such a model is relevant for example in modelling behaviour of some polymers and geomaterials. Although it is experimentally known that the material moduli of some viscoelastic fluids can depend on the pressure, most of the studies concerning the motion of viscoelastic fluids do not take such effects into account despite their possible practical significance in technological applications. Using a generalized Maxwell model with pressure dependent material moduli we solve a simple boundary value problem and we demonstrate interesting non-classical features exhibited by the model.
description: 16 pages, 14 figures, submitted to International Journal of Non-Linear Mechanics
Control the structure of the polyacrylate/epoxy resin film through photopolymerisation
Creators: name: Guo, Yongxing
name: Zhao, Jinghua
name: Wu, Limin
name: Liu, Wei
name: Li, Yi
name: Yang, Yonggang
Publisher: name: Taylor & Francis
Year: 2023
Subjects: subject: Biophysics
subject: Biochemistry
subject: Space Science
subject: Physical Sciences not elsewhere classified
subject: Biotechnology
subject: Environmental Sciences not elsewhere classified
subject: Chemical Sciences not elsewhere classified
subject: Immunology
subject: FOS: Clinical medicine
subject: Mathematical Sciences not elsewhere classified
subject: Plant Biology
subject: FOS: Biological sciences

description: Double-layered polymer-stabilised cholesteric liquid crystal (PSCLC) films constructed from epoxy resin and polyacrylate were prepared based on photopolymerisation-induced phase separation. Moreover, a PSCLC film with an interpenetrating network was prepared through a one-step photopolymerisation approach. A colourful pattern was prepared based on these two approaches, which was suitably applied for decoration.
Alkyl acid hydrazide-containing liquid crystalline triphenylenedicarboxyimides
Creators: name: Shang, Hong-Yi
name: Tang, Jia-Hui
name: Fan, Yu-Ping
name: Xiang, Shi-Kai
name: Hu, Ping
name: Zhao, Ke-Qing
name: Wang, Bi-Qin
name: Feng, Chun
name: Yu, Wen-Hao
Publisher: name: Taylor & Francis
Year: 2023
Subjects: subject: Biophysics
subject: Medicine
subject: Cell Biology
subject: Chemical Sciences not elsewhere classified
subject: Ecology
subject: FOS: Biological sciences
subject: Cancer
subject: Mental Health
subject: Virology

description: Seven hydrazide-containing triphenylenedicarboxyimides (TDIs) bearing four β-octyloxy side chains and one alkyl acid amide group at the imide nitrogen have been synthesised. These TDIs exhibit enantiotropic mesophases with broad mesomorphic temperature ranges and high clearing temperatures between 258°C and 318°C. Notably, TDI-NHCO-C4H9 with a n-butyl side chain exhibits a wide mesomorphic temperature range of over 300°C extending from below room temperature to 303°C. In contrast, its branched isomer TDI-NHCO-C(CH3)3 carrying a bulky tert-butyl chain displays a hexagonal columnar mesophase between 105°C and 318°C with the highest clearing temperature within the series, indicating that branching leads to a stabilisation of the mesophase. On the other hand, the approximately 83°C increase in the clearing temperature of hydrazide TDI-NHCO-C4H9 relative to imide TDI-C4H9 lacking the hydrazide function indicates a significant enhancement of mesophase stability upon introducing the hydrazide functional group. However, variable-temperature infrared studies revealed the presence of weaker hydrogen bonds below the clearing temperature, which do not significantly contribute to the stabilisation of the columnar mesophase. Instead, the primary stabilisation mechanism is attributed to the synergistic effect of π–π interactions and dipole–dipole interactions.
GLOBAL TRADE UNDER THE INFLUENCE OF COVID-19: NEW TRENDS AND DIRECTIONS
Creators: name: Kononenko, D.S.
Publisher: name: Экономика и бизнес: теория и практика
Year: 2021
Subjects: WORLD TRADE
CORONAVIRUS
RECOVERY
E-COMMERCE
TREND

description: Measures introduced to contain the spread of the coronavirus pandemic in recent years (quarantines, lockdowns, other restrictions on contacts and mobility of the population) have hit the entire global economy and international trade. This article examines the trends in the field of world trade that formed during the COVID-19 period, and quarterly monitoring of the restoration of international trade in goods and services is carried out.
Effect Of Weak Magnetic Field ($\sim $\,300 Gs) On the Intensity of Terahertz Emission of Hot Electrons in $n$-Ge at Helium Temperatures
Creators: name: Bondar, V. M.
name: Tomchuk, P. M.
name: Shepel'skii, G. A.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Experimental results of studying the effect of a weak magnetic field ($\sim $300 Gs) on the intensity of the terahertz emission ($λ\approx $100 $μ$m) of hot electrons in $n$-Ge (crystallographic orientation $< 1,0,0 >)$ at helium temperatures ($T\sim $5 K) are presented and discussed. It is shown that the strong influence of this field (decrease of the emission intensity by 500$÷$1000{%}) is related to a decrease of the carrier concentration at weak electric fields and the appearance of the magnetoresistance at stronger fields. The longitudinal magnetoresistance becomes significant due to the anisotropy of the energy dispersion law of electrons and a strong deformation of the electron velocity distribution function by the electric field (which is beyond the framework of the diffusion approximation).
Influence of density dependence of symmetry energy on fragmentation
Creators: name: Vinayak, Karan Singh
name: Singh, Mohinder
name: Kumar, Suneel
Publisher: name: arXiv
Year: 2011
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The fragmentation of projectile and spectator is studied at the different incident energies using isospin dependent QMD model with reduced isospin dependent cross-section. Different systems have been used for the analysis of fragment production(IMF). We have used enhanced constant isospin dependent cross-section to explain the experimental findings which is valid for soft equation of state. In addition to that we have tried to study the influence of density dependent symmetry energy on fragment production.
100 mum and 160 mum emission as resolved star-formation rate estimators in M33 (HERM33ES)
Creators: name: Boquien, M.
name: Calzetti, D.
name: Kramer, C.
name: Xilouris, E. M.
name: Bertoldi, F.
name: Braine, J.
name: Buchbender, C.
name: Combes, F.
name: Israel, F.
name: Koribalski, B.
name: Lord, S.
name: Quintana-Lacaci, G.
name: Relaño, M.
name: Röllig, M.
name: Stacey, G.
name: Tabatabaei, F. S.
name: Tilanus, R. P. J.
name: van der Tak, F.
name: van der Werf, P.
name: Verley, S.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Over the past few years several studies have provided estimates of the SFR (star-formation rate) or the total infrared luminosity from just one infrared band. However these relations are generally derived for entire galaxies, which are known to contain a large scale diffuse emission that is not necessarily related to the latest star-formation episode. We provide new relations to estimate the SFR from resolved star-forming regions at 100 mum and 160 mum. We select individual star-forming regions in the nearby (840 kpc) galaxy M33. We estimate the SFR combining the emission in Halpha and at 24 mum to calibrate the emission at 100 mum and 160 mum as SFR estimators, as mapped with PACS/Herschel. The data are obtained in the framework of the HERM33ES open time key project. There is less emission in the HII regions at 160 mum than at 100 mum. Over a dynamic range of almost 2 dex in Sigma(SFR) we find that the 100 mum emission is a nearly linear estimator of the SFR, whereas that at 160 mum is slightly superlinear. The behaviour of individual star-forming regions is surprisingly similar to that of entire galaxies. At high Sigma(SFR), star formation drives the dust temperature, whereas uncertainties and variations in radiation-transfer and dust-heated processes dominate at low Sigma(SFR). Detailed modelling of both galaxies and individual star forming regions will be needed to interpret similarities and differences between the two and assess the fraction of diffuse emission in galaxies.
description: 5 pages, 3 figures, accepted for publication in the A&A Herschel special issue
Οι εκπαιδευτικές μεταρρυθμίσεις 1880-1900
Creators: name: Σταθοπούλου, Μαρία
Publisher: name: Πανεπιστήμιο Πελοποννήσου
Year: 2024
Subjects: subject: Εκπαιδευτική αλλαγή -- Ελλάδα -- Ιστορία -- 19ος αιώνας
subject: Εκπαιδευτικό δίκαιο και νομοθεσία -- Ελλάδα -- Ιστορία -- 19ος αιώνας
subject: Εκπαίδευση -- Ελλάδα -- Ιστορία -- 19ος αιώνας
subject: Ευταξίας, Αθανάσιος, 1849-1931
subject: Αθανάσιος Ευταξίας
subject: Εκπαιδευτικά νομοσχέδια
subject: Εκπαιδευτικές βαθμίδες
subject: Εκπαιδευτική μεταρρύθμιση
subject: Εκσυγχρονισμός της εκπαίδευσης
subject: Athanasios Eutaxias
subject: Educational bills
subject: Educational levels
subject: Educational reform
subject: Modernization of the education

description: Η παρούσα εργασία εξετάζει έναν από τους βασικότερους πυλώνες της ελληνικής κοινωνίας: τη δημόσια εκπαίδευση στο τέλος του 19ου αιώνα. Το ελληνικό κράτος έθεσε εξαρχής ως προτεραιότητα την υλοποίηση των οραμάτων του, όπως η απελευθέρωση των ανελεύθερων περιοχών, με αποτέλεσμα η δημόσια εκπαίδευση να παραμείνει στάσιμη για πολλές δεκαετίες. Ταυτόχρονα παρουσιάζονται και σχολιάζονται τα εκπαιδευτικά νομοσχέδια του 1899, που αναφέρονται σε όλες τις εκπαιδευτικές βαθμίδες που εισήγαγε ο τότε Υπουργός Εκκλησιαστικών και Δημοσίας Εκπαιδεύσεως, Αθανάσιος Ευταξίας. Τέλος, η μακροχρόνια παθολογία του πολιτικού συστήματος του 19ου αιώνα αποτέλεσε παράγοντα που εμπόδιζε την υλοποίηση των μεταρρυθμιστικών προτάσεων στον τομέα της εκπαίδευσης.
D11.2 Experimental investigation of CO2 liquefaction for CO2 capture from cement plants
Creators: name: Trædal, Stian
name: Berstad, David
Publisher: name: Zenodo
Year: 2018
Subjects: CO2 capture
CCS
Cement
CO2 liquefaction
Membrane-assisted liquefaction
Experimental

description: This report gives a detailed description of the 10 ton per day low temperature CO2 liquefaction and phase separation laboratory rig installed in SINTEF Energy's laboratories in Trondheim, including specifications for its main components. This is followed by experimental results from the first experimental test campaigns with gas chromatography (GC) instruments connected.

The phase separation part of the experimental set-up consists of two separator stages. A binary gas mixture first enters the main separator, where the bulk separation is performed. The liquid CO2 is then heated and expanded to a lower pressure before it enters the second purification separator. The rig is well instrumented with pressure, temperature, mass flow and level sensors, as well as a gas chromatograph.

On 05.09.2018, experiments with a feed composition of approximately 63 mol% CO2 and 37 mol% N2 to the first separator were conducted. Tests were performed with liquid levels between 16 and 32 cm, and pressure levels between 30 and 35 bar in the first separator and 12 and 8 bar in the second separator. The final liquid CO2 product purities were measured. Close to equilibrium conditions were achieved. The results show that the product purity can be controlled by the pressure level of the second separator stage.

On 10.09.2018 an experiment with 32 cm liquid level in both separators, 30 bar pressure in the first separator and 8 bar pressure in the second separator were performed for a feed gas composition of 76 mol% CO2 and 24 mol% N2. Measurements of the composition were performed at the inlet to the first separator and at the vapour and liquid lines from both separators. Close to equilibrium conditions are achieved in the two separators. The experimental results for purity and CO2 capture ratio (CCR) are in good agreement with results from a HYSYS simulation of the process. A CCR of 83 % is estimated based on the experiments compared to 82 % in the simulations. It should be mentioned that the experimental rig and the simulation model thereof lacks an internal recycle stream which can increase the obtainable CCR considerably.