cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Radiative corrections to the neutron star mass inferred from QPO frequencies
Creators: name: Abramowicz, M. A.
name: Kluźniak, W.
name: Yu, W.
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: The frequencies of kHz QPOs are widely interpreted as being indicative of the values of characteristic frequencies related to orbital motion around neutron stars, e.g., the radial epicyclic frequency. In regions directly exposed to the radiation from the luminous neutron star these frequencies change with the luminosity. Including radiative corrections will change the neutron star mass value inferred from the QPO frequencies. Radiative forces may also be behind the puzzling phenomenon of parallel tracks.
description: 6 pages including 1 figure
Hiltrud Merten, Die Trierer Domgrabung 2
Creators: name: Hauser, Georg
Publisher: name: Trierer Zeitschrift - Archäologie und Kunst des Trierer Landes und seiner Nachbargebiete
Year: 2019

description: Rezension zu: Hiltrud Merten, Die Trierer Domgrabung 2. Die Ausgrabungen in der Kurie von der Leyen und der Liebfrauenstraße (Südwest-Bereich) 1. Die Funde. Mit Beiträgen von Lothar Bakker, Malgorzata Daszkiewicz, Gerwulf Schneider und Friedrich Strauch. Kataloge und Schriften des Bischöflichen Dom- und Diözesanmuseums Trier VII 2,1 (Selbstverlag des Bischöflichen Dom- und Diözesanmuseums, Trier 2006). 443 S., 51 Abb., 4 Tab., 87 Taf. ISBN 3-9807895-6-X. Gebunden
description: Trierer Zeitschrift - Archäologie und Kunst des Trierer Landes und seiner Nachbargebiete, Bd. 69/70 (2006/2007): Trierer Zeitschrift : Archäologie und Kunst des Trierer Landes und seiner Nachbargebiete
Hofeneder, Andreas, Die Religion der Kelten in den antiken literarischen Zeugnissen : Sammlung, Übersetzung und Kommentierung
Creators: name: Zeidler, Jürgen
Publisher: name: Trierer Zeitschrift - Archäologie und Kunst des Trierer Landes und seiner Nachbargebiete
Year: 2019

description: Rezension zu: Hofeneder, Andreas, Die Religion der Kelten in den antiken literarischen Zeugnissen : Sammlung, Übersetzung und Kommentierung. Wien : Verlag der Österreichischen Akademie der Wissenschaften
description: Trierer Zeitschrift - Archäologie und Kunst des Trierer Landes und seiner Nachbargebiete, Bd. 73/74 (2010/2011): Trierer Zeitschrift : Archäologie und Kunst des Trierer Landes und seiner Nachbargebiete
Exploiting Network Coding For Smart Healthcare: Scenarios And Challenges Sensor Networks For Sustainable Development
Creators: name: Kartsakli, Elli
name: Antonopoulos, Angelos
name: Verikoukis, Christos
Publisher: name: Zenodo
Year: 2014
Subjects: e-Health,
smart healthcare
WBAN
WSN
Network Coding

description: Recent technological advances and the multiple challenges faced by the healthcare sector are strongly motivating

the adoption and development of e-Health services. In this chapter, we give a high-level framework for the design

of end-to-end e-Health solutions and focus on the potential enhancements that can be achieved by the application of

Network Coding (NC) techniques at the Medium Access Control (MAC) layer. After a survey of existing solutions

in the literature, we present a novel MAC scheme that employs NC techniques in a cooperative sensor network.

The use of NC enables bidirectional communication in an efficient way, reducing energy consumption without

compromising the Quality of Service (QoS).
Inherent Mach-Zehnder interference with "which-way" detection for single particle scattering in one dimension
Creators: name: Zhou, Lan
name: Chang, Yue
name: Dong, H.
name: Kuang, Le-Man
name: Sun, C. P.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We study the coherent transport of single photon in a one-dimensional coupled-resonator-array, "non-locally" coupled to a two-level system. Since its inherent structure is a Mach-Zehnder interferometer, we explain the destructive interference phenomenon of the transmission spectrums according to the effect of which-way detection. The quantum realization of the present model is a nano-electromechanical resonator arrays with two nearest resonators coupled to a single spin via their attached magnetic tips. Its classical simulation is a waveguide of coupled defected cavity array with double couplings to a side defected cavity.
description: 5 papges, 4 figures
Balduin von Luxemburg : Erzbischof und Kurfürst von Trier (1308 - 1354)
Creators: name: Müller, Jörg R.
Publisher: name: Trierer Zeitschrift - Archäologie und Kunst des Trierer Landes und seiner Nachbargebiete
Year: 2019

description: Rezension zu: Balduin von Luxemburg : Erzbischof und Kurfürst von Trier (1308 - 1354) ; Vorträge eines Kolloquiums in Trier im Juni 2008. Trier : Stadtbibliothek, 2010. 220 S.. ISBN 978-3-00-032031-6
description: Trierer Zeitschrift - Archäologie und Kunst des Trierer Landes und seiner Nachbargebiete, Bd. 75/76 (2012/2013): Trierer Zeitschrift : Archäologie und Kunst des Trierer Landes und seiner Nachbargebiete
ПСИХОФИЗИОЛОГИЧЕСКИЕ ОСОБЕННОСТИ ФОРМИРОВАНИЯ ФУНКЦИОНАЛЬНОГО ПЕРЕУТОМЛЕНИЯ У МЕДИЦИНСКИХ РАБОТНИКОВ В СОВРЕМЕННЫХ УСЛОВИЯХ ДЕЯТЕЛЬНОСТИ
Creators: name: Казакова, Галина
Publisher: name: ООО Цифра
Year: 2022
Subjects: medical workers
overstress
prevention
медицинские работники
перенапряжение
профилактика

description: Международный научно-исследовательский журнал, Выпуск 12 (126) 2022
Experimental assessment of the contribution of electrodynamic interactions to long-distance recruitment of biomolecular partners: Theoretical basis
Creators: name: Preto, Jordane
name: Floriani, Elena
name: Nardecchia, Ilaria
name: Ferrier, Pierre
name: Pettini, Marco
Publisher: name: arXiv
Year: 2012
Subjects: subject: Biological Physics (physics.bio-ph)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: Highly specific spatiotemporal interactions between cognate molecular partners essentially sustain all biochemical transactions in the living matter. That such an exquisite level of accuracy may result from encountering forces solely driven by thermal diffusive processes is unlikely. Here we propose a yet unexplored strategy to experimentally tackle the long-standing question of a possibly active recruitment at a distance of cognate partners of biomolecular reactions via the action of resonant electrodynamic interactions. We considered two simplified models for a preliminary feasibility investigation of the devised methodology. By taking advantage of advanced experimental techniques nowadays available, we propose to measure the characteristic encounter time scales of dually-interacting biopartners and to compare them with theoretical predictions worked out both in the presence or absence of putative long-range electromagnetic forces.
description: 30 pages, 6 figures, Physical Review E, in press
Early Fault-Tolerant Quantum Algorithms in Practice: Application to Ground-State Energy Estimation
Creators: name: Kiss, Oriel
name: Azad, Utkarsh
name: Requena, Borja
name: Roggero, Alessandro
name: Wakeham, David
name: Arrazola, Juan Miguel
Publisher: name: arXiv
Year: 2024
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We investigate the feasibility of early fault-tolerant quantum algorithms focusing on ground-state energy estimation problems. In particular, we examine the computation of the cumulative distribution function (CDF) of the spectral measure of a Hamiltonian and the identification of its discontinuities. Scaling these methods to larger system sizes reveals three key challenges: the smoothness of the CDF for large supports, the lack of tight lower bounds on the overlap with the true ground state, and the difficulty of preparing high-quality initial states. To address these challenges, we propose a signal processing approach to find these estimates automatically, in the regime where the quality of the initial state is unknown. Rather than aiming for exact ground-state energy, we advocate for improving classical estimates by targeting the low-energy support of the initial state. Additionally, we provide quantitative resource estimates, demonstrating a constant-factor improvement in the number of samples required to detect a specified change in CDF. Our numerical experiments, conducted on a 26-qubit fully connected Heisenberg model, leverage a truncated density-matrix renormalization group (DMRG) initial state with a low bond dimension. The results show that the predictions from the quantum algorithm align closely with the DMRG-converged energies at larger bond dimensions while requiring several orders of magnitude fewer samples than theoretical estimates suggest. These findings underscore that CDF-based quantum algorithms are a practical and resource-efficient alternative to quantum phase estimation, particularly in resource-constrained scenarios.
description: 22 pages, 10 figures, code available
Werner Ernst Stöckli, Chronologie der jüngeren Eisenzeit im Tessin
Creators: name: Spindler, Konrad
Publisher: name: Bonner Jahrbücher
Year: 2020

description: Rezension zu: Werner Ernst Stöckli, Chronologie der jüngeren Eisenzeit im Tessin. Antiqua 2. Veröffentlichungen der Schweizerischen Gesellschaft für Ur- und Frühgeschichte, Basel 1975. 188 Seiten, 98 Abbildungen und 50 Tafeln.
description: Bonner Jahrbücher, Bd. 180.1980: Bonner Jahrbücher
Gender differences in adolescent students' computer experiences, attitudes, and future career plans
Creators: name: Teasdale, Stephanie Lyn
Publisher: name: University of Calgary
Year: 2002
Subjects: subject: AC1 .T484 2002 T43
subject: Computer literacy - Sex differences
subject: Computer science - Sex differences
subject: Sex differences in education
subject: Women in computer science
subject: Junior high school students - Attitudes
subject: High school students - Attitudes

description: Bibliography: p. 82-96.
Spatial and temporal dynamics of infected populations: the Mexican epidemic
Creators: name: Rodriguez-Meza, Mario A.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Biological Physics (physics.bio-ph)
subject: Populations and Evolution (q-bio.PE)
subject: FOS: Physical sciences
subject: FOS: Biological sciences

description: Recently the A/H1N1-2009 virus pandemic appeared in Mexico and in other nations. We present a study of this pandemic in the Mexican case using the SIR model to describe epidemics. This model is one of the simplest models but it has been a successful description of some epidemics of closed populations. We consider the data for the Mexican case and use the SIR model to make some predictions. Then, we generalize the SIR model in order to describe the spatial dynamics of the disease. We make a study of the spatial and temporal spread of the infected population with model parameters that are consistent with temporal SIR model parameters obtained by fitting to the Mexican case.
description: 4 pages, 2 figures, accepted for publication in Rev. Mex. Fis
E-commerce payment service
Creators: name: Ahmed, Sk Tanvir
Publisher: name: figshare
Year: 2022
Subjects: Cyberphysical systems and internet of things
Cybersecurity and privacy not elsewhere classified

description: The definition of E-commerce and its branch have a big diversity. Based on this fact this paper will discuss the e-commerce payment service. In addition, this paper will point out two scholarly articles. The first article is based on the nature of E-commerce such as e-commerce, e-government, e-learning, etc. On the other hand, it also points out the reason for big companies’ E-commerce failure. The second scholarly article is about different types of E-payment systems and how they can keep more secure. Furthermore, traditional payment service has been changed such as digital cash. This paper also focuses on future E-commerce payment systems. One of them is about how E-commerce has changed and keeps changing due to modern technology. For example, now all smartphone operating systems took part in the update. Based on this fact the application of E-commerce such as banks and other payment systems also need to be updated can fulfill the user requirement. As a result, the faster change of the ecosystem can be driven by the number of consumers. Based on this fact companies also need to update their payment method. On the other hand, the company won not gain success in the market by only focusing on updating the E-commerce payment service. They also have to focus on competitive advantage and meet customer user requirements. For example, virtual customer service has been getting popular nowadays. Based on this fact companies are now pointing more toward virtual online customer service to gain more customer experience. The last part of this paper will discuss cryptocurrencies in E-commerce. At present people still use cash and card payments, however, that payment service won not work in different countries. Moreover, time of process, charge, and security is also a point of view. Based on this fact the IT developer is now working on an online currency service. In addition, people will enjoy both advantages and disadvantages of this online currency. However, it can be said that in the future most transactions will take place through cryptocurrencies.
[Annoncen]
Creators: name: Die Redaktion
Publisher: name: Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege
Year: 2020

description: -
description: Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege, Bd. 41 Nr. 4 (2000): Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege
Immigrant youth in the schoolyard: identity, liminality and belonging
Creators: name: Racicot, Christine
Publisher: name: University of Calgary
Year: 2001
Subjects: subject: AC1 .T484 2001 R23
subject: Immigrant children - Alberta - Calgary
subject: Teenage immigrants - Alberta - Calgary
subject: Muslim children - Alberta - Calgary
subject: Social integration
subject: Group identity

description: Bibliography: p. 94-101.
AGNs as main contributors to the UV ionizing emissivity at high redshifts: predictions from a Lambda-CDM model with linked AGN/galaxy evolution
Creators: name: Giallongo, E.
name: Menci, N.
name: Fiore, F.
name: Castellano, M.
name: Fontana, A.
name: Grazian, A.
name: Pentericci, L.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We have evaluated the contribution of the AGN population to the ionization history of the Universe based on a semi-analytic model of galaxy formation and evolution in the CDM cosmological scenario. The model connects the growth of black holes and of the ensuing AGN activity to galaxy interactions. In the model we have included a self consistent physical description of the escape of ionizing UV photons; this is based on the blast-wave model for the AGN feedback we developed in a previous paper to explain the distribution of hydrogen column densities in AGNs of various redshifts and luminosities, due to absorption by the host galaxy gas. The model predicts UV luminosity functions for AGNs which are in good agreement with those derived from the observations especially at low and intermediate redshifts (z=3). At higher redshifts (z>5) the model tends to overestimate the data at faint luminosities. Critical biases both in the data and in the model are discussed to explain such apparent discrepancies. The predicted hydrogen photoionization rate as a function of redshift is found to be consistent with that derived from the observations. All that suggests to reconsider the role of the AGNs as the main driver of the ionization history of the Universe.
description: ApJ accepted
[Annoncen]
Creators: name: Die Redaktion
Publisher: name: Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege
Year: 2020

description: -
description: Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege, Bd. 52 Nr. 1 (2011): Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege
Grip strength from midlife as an indicator of later-life brain health and cognition: evidence from a British birth cohort
Creators: name: Dercon, Quentin
name: Nicholas, Jennifer M.
name: James, Sarah-Naomi
name: Schott, Jonathan M.
name: Richards, Marcus
Publisher: name: Apollo - University of Cambridge Repository
Year: 2021
Subjects: Research
Grip strength
Physical function
Brain volume
White matter hyperintensity volume
Nonverbal reasoning
Cognitive ageing

description: Abstract: Background: Grip strength is an indicator of physical function with potential predictive value for health in ageing populations. We assessed whether trends in grip strength from midlife predicted later-life brain health and cognition. Methods: 446 participants in an ongoing British birth cohort study, the National Survey of Health and Development (NSHD), had their maximum grip strength measured at ages 53, 60–64, and 69, and subsequently underwent neuroimaging as part of a neuroscience sub-study, referred to as “Insight 46”, at age 69–71. A group-based trajectory model identified latent groups of individuals in the whole NSHD cohort with below- or above-average grip strength over time, plus a reference group. Group assignment, plus standardised grip strength levels and change from midlife were each related to measures of whole-brain volume (WBV) and white matter hyperintensity volume (WMHV), plus several cognitive tests. Models were adjusted for sex, body size, head size (where appropriate), sociodemographics, and behavioural and vascular risk factors. Results: Lower grip strength from midlife was associated with smaller WBV and lower matrix reasoning scores at age 69–71, with findings consistent between analysis of individual time points and analysis of trajectory groups. There was little evidence of an association between grip strength and other cognitive test scores. Although greater declines in grip strength showed a weak association with higher WMHV at age 69–71, trends in the opposite direction were seen at individual time points with higher grip strength at ages 60–64, and 69 associated with higher WMHV. Conclusions: This study provides preliminary evidence that maximum grip strength may have value in predicting brain health. Future work should assess to what extent age-related declines in grip strength from midlife reflect concurrent changes in brain structure.
Data Acquisition and Readout System for the LUX Dark Matter Experiment
Creators: name: Akerib, D. S.
name: Bai, X.
name: Bedikian, S.
name: Bernard, E.
name: Bernstein, A.
name: Bradley, A.
name: Cahn, S. B.
name: Carmona-Benitez, M. C.
name: Carr, D.
name: Chapman, J. J.
name: Clark, K.
name: Classen, T.
name: Coffey, T.
name: Curioni, A.
name: Dazeley, S.
name: deViveiros, L.
name: Dragowsky, M.
name: Druszkiewicz, E.
name: Faham, C. H.
name: Fiorucci, S.
name: Gaitskell, R. J.
name: Gibson, K. R.
name: Hall, C.
name: Hanhardt, M.
name: Holbrook, B.
name: Ihm, M.
name: Jacobsen, R. G.
name: Kastens, L.
name: Kazkaz, K.
name: Lander, R.
name: Larsen, N.
name: Lee, C.
name: Leonard, D.
name: Lesko, K.
name: Lyashenko, A.
name: Malling, D. C.
name: Mannino, R.
name: McKinsey, D. N.
name: Mei, D.
name: Mock, J.
name: Morii, M.
name: Nelson, H.
name: Nikkel, J. A.
name: Pangilinan, M.
name: Phelps, P.
name: Shutt, T.
name: Skulski, W.
name: Sorensen, P.
name: Spaans, J.
name: Stiegler, T.
name: Svoboda, R.
name: Sweany, M.
name: Szydagis, M.
name: Thomson, J.
name: Tripathi, M.
name: Verbus, J. R.
name: Walsh, N.
name: Webb, R.
name: White, J. T.
name: Wlasenko, M.
name: Wolfs, F. L. H.
name: Woods, M.
name: Zhang, C.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: LUX is a two-phase (liquid/gas) xenon time projection chamber designed to detect nuclear recoils from interactions with dark matter particles. Signals from the LUX detector are processed by custom-built analog electronics which provide properly shaped signals for the trigger and data acquisition (DAQ) systems. The DAQ is comprised of commercial digitizers with firmware customized for the LUX experiment. Data acquisition systems in rare-event searches must accommodate high rate and large dynamic range during precision calibrations involving radioactive sources, while also delivering low threshold for maximum sensitivity. The LUX DAQ meets these challenges using real-time baseline sup- pression that allows for a maximum event acquisition rate in excess of 1.5 kHz with virtually no deadtime. This paper describes the LUX DAQ and the novel acquisition techniques employed in the LUX experiment.
Vector meson dominance and radiative decays of heavy spin-3/2 baryons to heavy spin--1/2 baryons
Creators: name: Aliev, T. M.
name: Savci, M.
name: Zamiralov, V. S.
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Using the calculated values of the strong coupling constants of the heavy sextet spin-3/2 baryons to sextet and antitriplet heavy spin-1/2 baryons with light mesons within the light cone QCD sum rules method, and vector meson dominance assumption, the radiative decay widths are calculated. These widths are compared with the "direct" radiative decay widths predicted in the framework of the light cone QCD sum rules.
description: 8 pages, no figures, LaTeX formatted
Fragmentation of $^7$Li Relativistic Nuclei on a Proton into the $^3$H+$^4$He Channel
Creators: name: Peresadko, N. G.
name: Alexandrov, Yu. A.
name: Gerasimov, S. G.
name: Dronov, V. A.
name: Larionova, V. G.
name: Pisetskaya, A. V.
name: Malakhov, A. I.
name: Tamm, E. I.
name: Fetisov, V. N.
name: Kharlamov, S. P.
name: Shesterkina, L. N.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: In a track nuclear photoemulsion exposed to a beamof $^7$Li nuclei accelerated to a momentum of 3 GeV/$c$ per nucleon at the synchrophasotron of the Joint Institute for Nuclear Research (JINR, Dubna), 13 events in which $^7$Li nuclei interacting with protons break up into $^3$H and $^4$He fragments were detected among 3730 inelastic-interaction events. For this fragmentation channel, the cross section was found to be $8\pm2$ mb. The average value of the fragment total transverse momentum was $214\pm5$ MeV/$c$. This value exceedsmarkedly the average value of the transverse-momentumtransfer in the coherent dissociation of $^7$Li nuclei on track-emulsion nuclei ($166\pm5$ MeV/$c$). The recoil-proton transverse momentum was on average 98% of the total proton momentum. The longitudinal-momentum distribution of protons was characterized by a variance of 16 MeV/$c$ and a mean value of $37\pm2$ MeV/$c$.
description: ISSN 1063-7788
The hidden side of animal cognition research: Scientists’ attitudes toward bias, replicability and scientific practice
Creators: name: Farrar, Benjamin G.
name: Ostojić, Ljerka
name: Clayton, Nicola S.
Publisher: name: Apollo - University of Cambridge Repository
Year: 2021
Subjects: subject: Research Article
subject: Biology and life sciences
subject: Research and analysis methods
subject: Social sciences
subject: FOS: Social sciences
subject: Science policy

description: Animal cognition research aims to understand animal minds by using a diverse range of methods across an equally diverse range of species. Throughout its history, the field has sought to mitigate various biases that occur when studying animal minds, from experimenter effects to anthropomorphism. Recently, there has also been a focus on how common scientific practices might affect the reliability and validity of published research. Usually, these issues are discussed in the literature by a small group of scholars with a specific interest in the topics. This study aimed to survey a wider range of animal cognition researchers to ask about their attitudes towards classic and contemporary issues facing the field. Two-hundred and ten active animal cognition researchers completed our survey, and provided answers on questions relating to bias, replicability, statistics, publication, and belief in animal cognition. Collectively, researchers were wary of bias in the research field, but less so in their own work. Over 70% of researchers endorsed Morgan’s canon as a useful principle but many caveated this in their free-text responses. Researchers self-reported that most of their studies had been published, however they often reported that studies went unpublished because they had negative or inconclusive results, or results that questioned “preferred” theories. Researchers rarely reported having performed questionable research practices themselves—however they thought that other researchers sometimes (52.7% of responses) or often (27.9% of responses) perform them. Researchers near unanimously agreed that replication studies are important but too infrequently performed in animal cognition research, 73.0% of respondents suggested areas of animal cognition research could experience a ‘replication crisis’ if replication studies were performed. Consistently, participants’ free-text responses provided a nuanced picture of the challenges animal cognition research faces, which are available as part of an open dataset. However, many researchers appeared concerned with how to interpret negative results, publication bias, theoretical bias and reliability in areas of animal cognition research. Collectively, these data provide a candid overview of barriers to progress in animal cognition and can inform debates on how individual researchers, as well as organizations and journals, can facilitate robust scientific research in animal cognition.
On the Significance of Absorption Features in HST/COS Data
Creators: name: Keeney, Brian A.
name: Danforth, Charles W.
name: Stocke, John T.
name: France, Kevin
name: Green, James C.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: We present empirical scaling relations for the significance of absorption features detected in medium resolution, far-UV spectra obtained with the Cosmic Origins Spectrograph (COS). These relations properly account for both the extended wings of the COS line spread function and the non-Poissonian noise properties of the data, which we characterize for the first time, and predict limiting equivalent widths that deviate from the empirical behavior by \leq 5% when the wavelength and Doppler parameter are in the ranges λ= 1150-1750 A and b > 10 km/s. We have tested a number of coaddition algorithms and find the noise properties of individual exposures to be closer to the Poissonian ideal than coadded data in all cases. For unresolved absorption lines, limiting equivalent widths for coadded data are 6% larger than limiting equivalent widths derived from individual exposures with the same signal-to-noise. This ratio scales with b-value for resolved absorption lines, with coadded data having a limiting equivalent width that is 25% larger than individual exposures when b \approx 150 km/s.
description: 25 pages, 3 tables, 7 figures, accepted for publication in PASP
Gravitational collapse in f(R) theories
Creators: name: Cembranos, J. A. R.
name: de la Cruz-Dombriz, A.
name: Nuñez, B. Montes
Publisher: name: arXiv
Year: 2012
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We study the gravitational collapse in modified gravitational theories. In particular, we analyze a general $f(R)$ model with uniformly collapsing cloud of self-gravitating dust particles. This analysis shares analogies with the formation of large-scale structures in the early Universe and with the formation of stars in a molecular cloud experiencing gravitational collapse. In the same way, this investigation can be used as a first approximation to the modification that stellar objects can suffer in these modified theories of gravity. We study concrete examples, and find that the analysis of gravitational collapse is an important tool to constrain models that present late-time cosmological acceleration.
description: 10 pages, 6 figures
A possible signature of non-uniform Be-αrelationships for the Galaxy
Creators: name: Tan, Kefeng
name: Zhao, Gang
Publisher: name: arXiv
Year: 2011
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Most of the previous studies on beryllium abundances in metal-poor stars have taken different Galactic populations as a whole when investigating the production and evolution of Be. In this Letter, we report on the detection of systematic differences in [α/H]-A(Be) relationships between the low- and high-α stars which were identified by previous works. We remind that one should be more careful in investigating the Galactic evolution of Be with a sample comprising different Galactic populations, because such a mixed sample may lead to inaccurate Be-Fe/Be-O relationships.
description: 12 pages, 3 figures; accepted for publication in ApJ Letter
Generalized parallel tempering on Bayesian inverse problems
Creators: name: Latz, Jonas
name: Madrigal-Cianci, Juan P.
name: Nobile, Fabio
name: Tempone, Raúl
Publisher: name: Apollo - University of Cambridge Repository
Year: 2021
Subjects: Article
Bayesian inversion
Parallel tempering
Infinite swapping
Markov chain Monte Carlo
Uncertainty quantification

description: Funder: Alexander von Humboldt-Stiftung; doi: http://dx.doi.org/10.13039/100005156
description: Abstract: In the current work we present two generalizations of the Parallel Tempering algorithm in the context of discrete-time Markov chain Monte Carlo methods for Bayesian inverse problems. These generalizations use state-dependent swapping rates, inspired by the so-called continuous time Infinite Swapping algorithm presented in Plattner et al. (J Chem Phys 135(13):134111, 2011). We analyze the reversibility and ergodicity properties of our generalized PT algorithms. Numerical results on sampling from different target distributions, show that the proposed methods significantly improve sampling efficiency over more traditional sampling algorithms such as Random Walk Metropolis, preconditioned Crank–Nicolson, and (standard) Parallel Tempering.
Ambitwistor strings in six and five dimensions
Creators: name: Geyer, Yvonne
name: Mason, Lionel
name: Skinner, David
Publisher: name: Apollo - University of Cambridge Repository
Year: 2021
Subjects: Regular Article - Theoretical Physics
Scattering Amplitudes
Superstrings and Heterotic Strings

description: Abstract: Ambitwistor strings are chiral (holomorphic) strings whose target is the space of complex null geodesics, ambitwistor space. We introduce twistor representations of ambitwistor space in 6 and 5 dimensions. In 6d the twistor representation is naturally conformally invariant. Anomaly cancellation leads to models that describe biadjoint scalar amplitudes and certain conformally invariant gauge and gravity theories, respectively of 4th and 6th order. There are three such models, reflecting triality for the conformal group SO(8) associated to these 6d models. On reduction to five dimensions, gauge anomaly cancellation requires supersymmetry and the resulting models describe maximally supersymmetric Yang-Mills and gravity. The twistor representation of these ambitwistor strings lead to formulæ for maximally supersymmetric gauge and gravity amplitudes based on the polarized scattering equations in 5d, found earlier by the first two authors.
The feeding ecology, ranging behaviour, and activity budget of Geoffroy's Pied colobus (Colobus vellerosus) at the Boabeng-Fiema Monkey Sanctuary
Creators: name: Teichroeb, Julie A.
Publisher: name: University of Calgary
Year: 2002
Subjects: subject: AC1 .T484 2002 T435

description: Bibliography: p. 109-124.
Observations of Reconnecting Flare Loops with the Atmospheric Imaging Assembly (AIA)
Creators: name: Warren, Harry P.
name: O'Brien, Casey M.
name: Sheeley, Neil R.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Perhaps the most compelling evidence for the role of magnetic reconnection in solar flares comes from the supra-arcade downflows that have been observed above many post-flare loop arcades. These downflows are thought to be related to highly non-potential field lines that have reconnected and are propagating away from the current sheet. We present new observations of supra-arcade downflows taken with the Atmospheric Imagining Assembly (AIA) on the \textit{Solar Dynamics Observatory} (\textit{SDO}). The morphology and dynamics of the downflows observed with AIA provide new evidence for the role of magnetic reconnection in solar flares. With these new observations we are able to measure downflows originating at much larger heights than in previous studies. We find, however, that the initial velocities measured here ($\sim$144\,km s$^{-1}$) are well below the Alfv{é}n speed expected in the lower corona, and consistent with previous results. We also find no evidence that the downflows brighten with time, as would be expected from chromospheric evaporation. These observations suggest that simple two-dimensional models cannot explain the detailed observations of solar flares.
description: Movies are available http://tcrb.nrl.navy.mil/~hwarren/temp/papers/inflows/ in QuickTime format
Giant half-cycle attosecond pulses
Creators: name: Wu, H. -C.
name: Meyer-ter-Vehn, J.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Optics (physics.optics)
subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: Half-cycle picosecond pulses have been produced from thin photo-conductors, when applying an electric field across the surface and switching on conduction by a short laser pulse. Then the transverse current in the wafer plane emits half-cycle pulses in normal direction, and pulses of 500 fs duration and 1e6 V/m peak electric field have been observed. Here we show that single half-cycle pulses of 50 as duration and up to 1e13 V/m can be produced when irradiating a double foil target by intense few-cycle laser pulses. Focused onto an ultra-thin foil, all electrons are blown out, forming a uniform sheet of relativistic electrons. A second layer, placed at some distance behind, reflects the drive beam, but lets electrons pass straight. Under oblique incidence, beam reflection provides the transverse current, which emits intense half-cycle pulses. Such a pulse may completely ionize even heavier atoms. New types of attosecond pump-probe experiments will become possible.
description: 5 pages, 4 figures, to be presented at LEI2011-Light at Extreme Intensities and China-Germany Symposium on Laser Acceleration
Channel Estimation for MIMO MC-CDMA Systems
Creators: name: Sureshkumar, K.
name: Rajalakshmi, R.
name: Vetrikanimozhi, A.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: FOS: Computer and information sciences

description: The concepts of MIMO MC-CDMA are not new but the new technologies to improve their functioning are an emerging area of research. In general, most mobile communication systems transmit bits of information in the radio space to the receiver. The radio channels in mobile radio systems are usually multipath fading channels, which cause inter-symbol interference (ISI) in the received signal. To remove ISI from the signal, there is a need of strong equalizer. In this thesis we have focused on simulating the MIMO MC-CDMA systems in MATLAB and designed the channel estimation for them.
Methods of 3D printing models of pituitary tumors
Creators: name: Gillett, Daniel
name: Bashari, Waiel
name: Senanayake, Russell
name: Marsden, Daniel
name: Koulouri, Olympia
name: MacFarlane, James
name: Van Der Meulen, Merel
name: Powlson, Andrew S.
name: Mendichovszky, Iosif A.
name: Cheow, Heok
name: Bird, Nick
name: Kolias, Angelos
name: Mannion, Richard
name: Gurnell, Mark
Publisher: name: Apollo - University of Cambridge Repository
Year: 2021
Subjects: Research
Desktop Vat Polymerization (Stereolithography)
3D printing
Pituitary
PET/CT
MRI
Cost analysis
Clinical utility

description: Funder: National Institute for Health Research; doi: http://dx.doi.org/10.13039/501100000272
description: Abstract: Background: Pituitary adenomas can give rise to a variety of clinical disorders and surgery is often the primary treatment option. However, preoperative magnetic resonance imaging (MRI) does not always reliably identify the site of an adenoma. In this setting molecular (functional) imaging (e.g. 11C-methionine PET/CT) may help with tumor localisation, although interpretation of these 2D images can be challenging. 3D printing of anatomicalal models for other indications has been shown to aid surgical planning and improve patient understanding of the planned procedure. Here, we explore the potential utility of four types of 3D printing using PET/CT and co-registered MRI for visualising pituitary adenomas. Methods: A 3D patient-specific model based on a challenging clinical case was created by segmenting the pituitary gland, pituitary adenoma, carotid arteries and bone using contemporary PET/CT and MR images. The 3D anatomical models were printed using VP, MEX, MJ and PBF 3D printing methods. Different anatomicalal structures were printed in color with the exception of the PBF anatomical model where a single color was used. The anatomical models were compared against the computer model to assess printing accuracy. Three groups of clinicians (endocrinologists, neurosurgeons and ENT surgeons) assessed the anatomical models for their potential clinical utility. Results: All of the printing techniques produced anatomical models which were spatially accurate, with the commercial printing techniques (MJ and PBF) and the consumer printing techniques (VP and MEX) demonstrating comparable findings (all techniques had mean spatial differences from the computer model of < 0.6 mm). The MJ, VP and MEX printing techniques yielded multicolored anatomical models, which the clinicians unanimously agreed would be preferable to use when talking to a patient; in contrast, 50%, 40% and 0% of endocrinologists, neurosurgeons and ENT surgeons respectively would consider using the PBF model. Conclusion: 3D anatomical models of pituitary tumors were successfully created from PET/CT and MRI using four different 3D printing techniques. However, the expert reviewers unanimously preferred the multicolor prints. Importantly, the consumer printers performed comparably to the commercial MJ printing technique, opening the possibility that these methods can be adopted into routine clinical practice with only a modest investment.
The career beliefs of post-secondary student seeking career counselling
Creators: name: Roll, Trina Louise
Publisher: name: University of Calgary
Year: 2002
Subjects: subject: AC1 .T484 2002 R65
subject: Vocational guidance
subject: Career development
subject: College students - Attitudes
subject: Perfectionism (Personality trait)
subject: Self-efficacy

description: Bibliography: p.91-107.
Multiuser Detection and Channel Estimation for Multibeam Satellite Communications
Creators: name: Chaouech, Helmi
name: Bouallegue, Ridha
Publisher: name: arXiv
Year: 2012
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: In this paper, iterative multi-user detection techniques for multi-beam communications are presented. The solutions are based on a successive interference cancellation architecture and a channel decoding to treat the co-channel interference. Beams forming and channels coefficients are estimated and updated iteratively. A developed technique of signals combining allows power improvement of the useful received signal; and then reduction of the bit error rates with low signal to noise ratios. The approach is applied to a synchronous multi-beam satellite link under an additive white Gaussian channel. Evaluation of the techniques is done with computer simulations, where a noised and multi-access environment is considered. The simulations results show the good performance of the proposed solutions.
description: 12 pages
The formation of fullerenes: clues from new C60, C70, and (possible) planar C24 detections in Magellanic Cloud Planetary Nebulae
Creators: name: Garcia-Hernandez, D. A.
name: Iglesias-Groth, S.
name: Acosta-Pulido, J. A.
name: Manchado, A.
name: Garcia-Lario, P.
name: Stanghellini, L.
name: Villaver, E.
name: Shaw, Richard A.
name: Cataldo, F.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Chemical Physics (physics.chem-ph)
subject: Space Physics (physics.space-ph)
subject: FOS: Physical sciences

description: We present ten new Spitzer detections of fullerenes in Magellanic Cloud Planetary Nebulae, including the first extragalactic detections of the C70 molecule. These new fullerene detections together with the most recent laboratory data permit us to report an accurate determination of the C60 and C70 abundances in space. Also, we report evidence for the possible detection of planar C24 in some of our fullerene sources, as indicated by the detection of very unusual emission features coincident with the strongest transitions of this molecule at ~6.6, 9.8, and 20 um. The infrared spectra display a complex mix of aliphatic and aromatic species such as hydrogenated amorphous carbon grains (HACs), PAH clusters, fullerenes, and small dehydrogenated carbon clusters (possible planar C24). The coexistence of such a variety of molecular species supports the idea that fullerenes are formed from the decomposition of HACs. We propose that fullerenes are formed from the destruction of HACs, possibly as a consequence of shocks driven by the fast stellar winds, which can sometimes be very strong in transition sources and young PNe. This is supported by the fact that many of our fullerene-detected PNe show altered [NeIII]/[NeII] ratios suggestive of shocks as well as P-Cygni profiles in their UV lines indicative of recently enhanced mass loss.
description: Accepted for publication in The Astrophysical Journal Letters (16 pages, 2 Tables and 3 figures)
ATLAS silicon microstrip tracker: operation and performance
Creators: name: Mitsou, Vasiliki A.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: The Semiconductor Tracker (SCT) is a silicon strip detector and one of the key precision tracking devices in the Inner Detector of the ATLAS experiment at CERN LHC. The completed SCT has been installed inside the ATLAS experimental cavern since 2007 and has been operational since then. Calibration data has been taken regularly and analyzed to determine the performance of the system. In this paper the current status of the SCT is reviewed, including results from data-taking periods in 2010 and 2011. We report on the operation of the detector including overviews on services, connectivity and observed problems. The main emphasis is given to the performance of the SCT with the LHC in collision mode and to the performance of individual electronic components.
description: 5 pages, 4 figures, prepared for 13th ICATPP Conference on Astroparticle, Particle, Space Physics and Detectors for Physics Applications, 3-7 Oct 2011, Villa Olmo, Como, Italy
Smarandache idempotents in certain types of groups rings
Creators: name: Hummadi, Parween Ali
name: Osman, Shadan Abdulkadr
Publisher: name: arXiv
Year: 2012
Subjects: subject: Commutative Algebra (math.AC)
subject: FOS: Mathematics

description: In this paper we study S-idempotents of the group ring \mathbb{Z}_2G where G is a finite cyclic group of order n. We give a condition on n such that every nonzero idempotent element of the group ring \mathbb{Z}_2G is Smarandache idempotent and we find Smarandache idempotents of the group ring KG, where K is an algebraically closed field of characteristic 0 and G is a finite cyclic group.
description: 8 pages
HOMILADORLIK DAVRIDA MIKROFLORANING OʻZGARISHI VA UNI YAXSHILASHNING AHAMIYATI
Creators: name: Fayzullaeva, Zamira
Publisher: name: Zenodo
Year: 2023

description: Taqdim etilgan ushbu maqolada homiladorlik va tugʻruqning oʻz vaqtida asoratlarsiz kechishida boshqa omillar kabi muhim ahamiyat kab etadigan qin mikroflorasining normal tarkibi, uning oʻzgarishi va ushbu mikroflorani yaxshilashda amalga oshirish zarur boʻlgan chora tadbirlar xususida olib borilgan qisqacha adabiyotlar tahlili bayon qilingan. Taʻkidlash joizki, mikroflora inson aʻzo va toʻqimalarining ajralmas tarkibiy qismlaridan biri boʻlib, u ekologik tizimining maʻlum bir qismini tashkil etgan holda birinchi navbatda himoya funksiyasini bajaradigan mustamlaka qarshiligini saqlashda muhim rol oʻynaydi.
Electronic supplementary material from Public perceptions of trophy hunting are pragmatic, not dogmatic
Creators: name: Hare, Darragh
name: Dickman, Amy J.
name: Johnson, Paul J.
name: Rono, Betty J.
name: Mutinhima, Yolanda
name: Sutherland, Chris
name: Kulunge, Salum
name: Sibanda, Lovemore
name: Mandoloma, Lessah
name: Kimaili, David
Publisher: name: The Royal Society
Year: 2024
Subjects: classificationCode: 310399
subject: Ecology not elsewhere classified

description: Extended details of experimental design, predictions, methods, and results
title: Factors that influence the bond markets – Case study of the 2008 financial crisis
title: Παράγοντες που επηρεάζουν τις αγορές ομολόγων: Μελέτη της οικονομικής κρίσης του 2008
Creators: name: Λαζακης Εμμανουηλ
Publisher: name: Technical University of Crete
Year: 2022

description: In this dissertation, the basic categories of bonds and their characteristics will be mentioned. The thesis will present the way the interest rate environment affects the bond yields as well as the effects of monetary policy in the financial markets. This paper will also explain in detail the origins of the financial crisis of 2008 and present the key role fixed income instruments such as mortgage backed securities and collateralized debt obligations had in the creation of the bubble in the 2000s. This dissertation also explains the importance of lending standards in the formation of the bubble as well as the role of the credit rating agencies in this historical event.
It is not the purpose of this paper to provide information on the possible ways to avoid a similar crisis. This paper will simply present the basic characteristics of the fixed income markets and how the creation of ill fated fixed income securities led to the global financial crisis.
description: Στην παρούσα διπλωματική εργασία θα παρουσιαστούν οι βασικές κατηγορίες ομολόγων και τα χαρακτηριστικά τους. Σε αυτή την εργασία θα αναφερθεί η επίδραση που έχουν τα επιτόκια στην απόδοση των ομολόγων καθώς και ο τρόπος με τον οποίο η νομισματική πολιτική από τις κεντρικές τράπεζες επηρεάζει τις αγορές. Επιπλέον, γίνεται μια λεπτομερής αναφορά στους παράγοντες που οδήγησαν στην δημιουργία της οικονομικής φούσκας στην αγορά ακινήτων των Ηνωμένων Πολιτειών και στη συνέχεια στην οικονομική κρίση του 2008. Αναφέρεται η καθοριστική σημασία που είχαν τα κριτήρια απόκτησης στεγαστικών δανείων εκείνη την εποχή καθώς και ο ρόλος των οίκων αξιολόγησης στην ενίσχυση της συστημικής κρίσης.