cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Spectroscopy of the Methane ν3 Band with an Accurate Mid-Infrared Coherent Dual- Comb Spectrometer
Creators: name: Baumann, E.
name: Giorgetta, F. R.
name: Swann, W. C.
name: Zolot, A. M.
name: Coddington, I.
name: Newbury, N. R.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We demonstrate a high-accuracy dual-comb spectrometer centered at 3.4 μm. The amplitude and phase spectra of the P, Q, and partial R-branch of the methane ν3 band are measured at 25 MHz to 100 MHz point spacing with ~kHz resolution and a signal-to-noise ratio of up to 3500. A fit of the absorbance and phase spectra yield the center frequency of 132 rovibrational lines. The systematic uncertainty is estimated to be 300 kHz, which is 10-3 of the Doppler width and a tenfold improvement over Fourier transform spectroscopy. These data are the first high- accuracy molecular spectra obtained with a direct comb spectrometer.
description: journal article
Evolution of Hard X-ray Sources and Ultraviolet Solar Flare Ribbons for a Confined Eruption of a Magnetic Flux Rope
Creators: name: Guo, Y.
name: Ding, M. D.
name: Schmieder, B.
name: Démoulin, P.
name: Li, H.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We study the magnetic field structures of hard X-ray sources and flare ribbons of the M1.1 flare in active region NOAA 10767 on 2005 May 27. We have found in a nonlinear force-free field extrapolation, over the same polarity inversion line, a small pre-eruptive magnetic flux rope located next to sheared magnetic arcades. Ramaty High Energy Solar Spectroscopic Imager (RHESSI) and Transition Region and Coronal Explorer (TRACE) observed this confined flare in the X-ray bands and ultraviolet (UV) 1600 Å\ bands, respectively. In this event magnetic reconnection occurred at several locations. It first started at the location of the pre-eruptive flux rope. Then, the observations indicate that magnetic reconnection occurred between the pre-eruptive magnetic flux rope and the sheared magnetic arcades more than 10 minutes before the flare peak. It implied the formation of the larger flux rope, as observed with TRACE. Next, hard X-ray (HXR) sources appeared at the footpoints of this larger flux rope at the peak of the flare. The associated high-energy particles may have been accelerated below the flux rope, in or around a reconnection region. Still, the close spatial association between the HXR sources and the flux rope footpoints favors an acceleration within the flux rope. Finally, a topological analysis of a large solar region including the active regions NOAA 10766 and 10767 shows the existence of large-scale Quasi-Separatrix Layers (QSLs) before the eruption of the flux rope. No enhanced emission was found at these QSLs during the flare, but the UV flare ribbons stopped at the border of the closest large-scale QSL.
description: 24 pages, 7 figures, accepted for publication in ApJ
Triple-horizon spherically symmetric spacetime and holographic principle
Creators: name: Dymnikova, Irina
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 present a family of spherically symmetric spacetimes, specified by the density profile of a vacuum dark energy, which have the same global structure as the de Sitter spacetime but the reduced symmetry which leads to a time-evolving and spatially inhomogeneous cosmological term. It connects smoothly two de Sitter vacua with different values of cosmological constant and corresponds to anisotropic vacuum dark fluid defined by symmetry of its stress-energy tensor which is invariant under the radial boosts. This family contains a special class distinguished by dynamics of evaporation of a cosmological horizon which evolves to the triple horizon with the finite entropy, zero temperature, zero curvature, infinite positive specific heat, and infinite scrambling time. Non-zero value of the cosmological constant in the triple-horizon spacetime is tightly fixed by quantum dynamics of evaporation of the cosmological horizon.
description: Honorable Mentioned Essay - Gravity Research Foundation 2012; submitted to Int. J. Mod. Phys. D
Simple Derivation of the Lindblad Equation
Creators: name: Pearle, Philip
Publisher: name: arXiv
Year: 2012
Subjects: subject: Mathematical Physics (math-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The Lindblad equation is an evolution equation for the density matrix in quantum theory. It is the general linear, Markovian, form which ensures that the density matrix is hermitian, trace 1, positive and completely positive. Some elementary examples of the Lindblad equation are given. The derivation of the Lindblad equation presented here is "simple" in that all it uses is the expression of a hermitian matrix in terms of its orthonormal eigenvectors and real eigenvalues. Thus, it is appropriate for students who have learned the algebra of quantum theory. Where helpful, arguments are first given in a two-dimensional hilbert space.
description: To be published in the European Journal of Physics
title: Vocabulary list for the Tai Yo dialect in Quy Chau, part 1 of 2: items 1 to 1213 from the EFEO-CNRS-SOAS questionnaire
title: Vocabulaire du dialecte tai yo de Quy Chau, partie 1/2, items n° 1 à 1213 du questionnaire EFEO-CNRS-SOAS
title: Từ vựng thổ ngữ Tai Yo ở Quỳ Châu, phần 1/2, từ mục 1 đến 1213 trong bảng hỏi của EFEO-CNRS-SOAS
Creators: name: Ferlus, Michel
Publisher: name: Pangloss
Year: 2016
Subjects: subject: Linguistique
subject: Tai Yo

description: Tai Yo vocabulary, from word item 1 to word item 1213, EFEO-CNRS-SOAS wordlist [from n° 1 to 198.7 following Ferlus's notation]. The survey was mainly conducted in Vietnamese.
description: Từ vựng tiếng Tai Yo, từ mục từ 1 đến mục từ 1213 trong bảng từ của EFEO-CNRS-SOAS [từ số 1 đến 198.7 theo kí hiệu của Ferlus]. Cuộc điều tra được dẫn dắt chủ yếu bằng tiếng Việt.
On the coefficients of the asymptotic expansion of the kernel of Berezin-Toeplitz quantization
Creators: name: Hsiao, Chin-Yu
Publisher: name: arXiv
Year: 2011
Subjects: subject: Complex Variables (math.CV)
subject: Analysis of PDEs (math.AP)
subject: Differential Geometry (math.DG)
subject: FOS: Mathematics
subject: Complex geometry, Microlocal analysis

description: We give new methods for computing the coefficients of the asymptotic expansions of the kernel of Berezin-Toeplitz quantization obtained recently by Ma-Marinescu, and of the composition of two Berezin-Toeplitz quantizations. Our main tool is the stationary phase formula of Melin-Sjöstrand.
description: 35 pages
title: Vocabulary list for the Tai Yo dialect in Quy Chau, part 2 of 2: items 1214 to 2896 from the EFEO-CNRS-SOAS questionnaire
title: Vocabulaire du dialecte tai yo de Quy Chau, partie 2/2, items n° 1214 à 2896 du questionnaire EFEO-CNRS-SOAS
title: Từ vựng thổ ngữ Tai Yo ở Quỳ Châu, phần 2/2, từ mục 1214 đến 2896 trong bảng hỏi của EFEO-CNRS-SOAS
Creators: name: Ferlus, Michel
Publisher: name: Pangloss
Year: 2016
Subjects: subject: Linguistique
subject: Tai Yo

description: Tai Yo vocabulary, from word item 1214 to word item 2896, EFEO-CNRS-SOAS wordlist [from n°198.8 to 471a following Ferlus's notation]. The survey was mainly conducted in Vietnamese.
description: Từ vựng tiếng Tai Yo, từ mục từ 1214 đến mục từ 2896 trong bảng từ của EFEO-CNRS-SOAS [từ số 198.8 đến 471a theo kí hiệu của Ferlus]. Cuộc điều tra được dẫn dắt chủ yếu bằng tiếng Việt.
title: Vocabulary list for the Tai Yo dialect in Quy Chau: abridged questionnaire
title: Vocabulaire du dialecte tai yo de Quy Chau
title: Từ vựng thổ ngữ Tai Yo ở Quỳ Châu: bảng hỏi đã được rút gọn
Creators: name: Ferlus, Michel
Publisher: name: Pangloss
Year: 2016
Subjects: subject: Linguistique
subject: Tai Yo

description: Vocabulary in Tai Yo. The survey was mainly conducted in Vietnamese. This is a reduced version of the full questionnaire, elicited from a female speaker.
description: Từ vựng trong tiếng Tai Yo. Cuộc điều tra được dẫn dắt chủ yếu bằng tiếng Việt.
Vortex lattice studies in CeCoIn5 with H perpendicular to c
Creators: name: Das, P.
name: White, J. S.
name: Holmes, A. T.
name: Gerber, S.
name: Forgan, E. M.
name: Bianchi, A. D.
name: Kenzelmann, M.
name: Zolliker, M.
name: Gavilano, J. L.
name: Bauer, E. D.
name: Sarrao, J. L.
name: Petrovic, C.
name: Eskildsen, M. R.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We present small angle neutron scattering studies of the vortex lattice (VL) in CeCoIn5 with magnetic fields applied parallel (H) to the antinodal [100] and nodal [110] directions. For H || [100], a single VL orientation is observed, while a 90 degree reorientation transition is found for H || [110]. For both field orientations and VL configurations we find a distorted hexagonal VL with an anisotropy, Gamma = 2.0 +/- 0.05. The VL form factor shows strong Pauli paramagnetic effects similar to what have previously been reported for H || [001]. At high fields, above which the upper critical field (Hc2) becomes a first-order transition, an increased disordering of the VL is observed.
description: 5 pages, 4 figures
Coding With Action-dependent Side Information and Additional Reconstruction Requirements
Creators: name: Kittichokechai, Kittipong
name: Oechtering, Tobias J.
name: Skoglund, Mikael
Publisher: name: arXiv
Year: 2012
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: Constrained lossy source coding and channel coding with side information problems which extend the classic Wyner-Ziv and Gel'fand-Pinsker problems are considered. Inspired by applications in sensor networking and control, we first consider lossy source coding with two-sided partial side information where the quality/availability of the side information can be influenced by a cost-constrained action sequence. A decoder reconstructs a source sequence subject to the distortion constraint, and at the same time, an encoder is additionally required to be able to estimate the decoder's reconstruction. Next, we consider the channel coding "dual" where the channel state is assumed to depend on the action sequence, and the decoder is required to decode both the transmitted message and channel input reliably. Implications on the fundamental limits of communication in discrete memoryless systems due to the additional reconstruction constraints are investigated. Single-letter expressions for the rate-distortion-cost function and channel capacity for the respective source and channel coding problems are derived. The dual relation between the two problems is discussed. Additionally, based on the two-stage coding structure and the additional reconstruction constraint of the channel coding problem, we discuss and give an interpretation of the two-stage coding condition which appears in the channel capacity expression. Besides the rate constraint on the message, this condition is a necessary and sufficient condition for reliable transmission of the channel input sequence over the channel in our "two-stage" communication problem. It is also shown in one example that there exists a case where the two-stage coding condition can be active in computing the capacity, and it thus can actively restrict the set of capacity achieving input distributions.
description: submitted to IEEE Trans. Information Theory
Extending Term Suggestion with Author Names
Creators: name: Schaer, Philipp
name: Mayr, Philipp
name: Lüke, Thomas
Publisher: name: arXiv
Year: 2012
Subjects: subject: Information Retrieval (cs.IR)
subject: Digital Libraries (cs.DL)
subject: FOS: Computer and information sciences

description: Term suggestion or recommendation modules can help users to formulate their queries by mapping their personal vocabularies onto the specialized vocabulary of a digital library. While we examined actual user queries of the social sciences digital library Sowiport we could see that nearly one third of the users were explicitly looking for author names rather than terms. Common term recommenders neglect this fact. By picking up the idea of polyrepresentation we could show that in a standardized IR evaluation setting we can significantly increase the retrieval performances by adding topical-related author names to the query. This positive effect only appears when the query is additionally expanded with thesaurus terms. By just adding the author names to a query we often observe a query drift which results in worse results.
description: 6 pages; to be published in Proceedings of Theory and Practice of Digital Libraries 2012 (TPDL 2012)
The Search for Super-saturation in Chromospheric Emission
Creators: name: Christian, Damian J.
name: Mathioudakis, Mihalis
name: Arias, Tersi
name: Jardine, Moira
name: Jess, David B.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We investigate if the super-saturation phenomenon observed at X-ray wavelengths for the corona, exists in the chromosphere for rapidly rotating late-type stars. Moderate resolution optical spectra of fast rotating EUV- and X-ray- selected late-type stars were obtained. Stars in alpha Per were observed in the northern hemisphere with the Isaac Newton 2.5 m telescope and IDS spectrograph. Selected objects from IC 2391 and IC 2602 were observe in the southern hemisphere with the Blanco 4m telescope and R-C spectrograph at CTIO. Ca II H & K fluxes were measured for all stars in our sample. We find the saturation level for Ca II K at log(L_CaK/L_bol) = -4.08. The Ca II K flux does not show a decrease as a function of increased rotational velocity or smaller Rossby number as observed in the X-ray. This lack of "super-saturation" supports the idea of coronal-stripping as the cause of saturation and super-saturation in stellar chromospheres and corona, but the detailed underlying mechanism is still under investigation.
description: 28 Pages, 6 figures, 1 Table; Accepted in ApJ for Aug 2011
Theoretical Cepheid Period-Luminosity And Period-Color Relations In Spitzer IRAC Bands
Creators: name: Ngeow, Chow-Choong
name: Marconi, Marcella
name: Musella, Ilaria
name: Cignoni, Michele
name: Kanbur, Shashi M.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: In this paper the synthetic period-luminosity (P-L) relations in Spitzer's IRAC bands, based on a series of theoretical pulsation models with varying metal and helium abundance, were investigated. Selected sets of these synthetic P-L relations were compared to the empirical IRAC band P-L relations recently determined from Galactic and Magellanic Clouds Cepheids. For the Galactic case, synthetic P-L relations from model sets with (Y = 0.26, Z = 0.01), (Y = 0.26, Z = 0.02) and (Y = 0.28, Z = 0.02) agree with the empirical Galactic P-L relations derived from the Hubble Space Telescope parallaxes. For Magellanic Cloud Cepheids, the synthetic P-L relations from model sets with (Y = 0.25, Z = 0.008) agree with both of the empirical Large Magellanic Cloud (LMC) and Small Magellanic Cloud (SMC) P-L relations. Analysis of the synthetic P-L relations from all model sets suggested that the IRAC band P-L relations may not be independent of metallicity, as the P-L slopes and intercepts could be affected by the metallicity and/or helium abundance. We also derive the synthetic period color(P-C) relations in the IRAC bands. Non-vanishing synthetic P-C relations were found for certain combinations of IRAC band filters and metallicity. However, the synthetic P-C relations disagreed with the [3.6]-[8.0] P-C relation recently found for the Galactic Cepheids. The synthetic [3.6]-[4.5] P-C slope from (Y = 0.25, Z = 0.008) model set, on the other hand, is in excellent agreement to the empirical LMC P-C counterpart, if a period range of 1.0 < log(P) < 1.8 is adopted.
description: 13 pages, 14 figures and 5 tables, ApJ accepted
A high resolution study of intergalactic O VI absorbers at z~2.3
Creators: name: Muzahid, S.
name: Srianand, R.
name: Bergeron, J.
name: Petitjean, P.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: [Abridged] We present a detailed study of the largest sample of intervening O VI systems in the redshift range 1.9 < z < 3.1 detected in high resolution (R ~ 45,000) spectra of 18 bright QSOs observed with VLT/UVES. Based on Voigt profile and apparent optical depth analysis we find that (i) the Doppler parameters of the O VI absorption are usually broader than those of C IV (ii) the column density distribution of O VI is steeper than that of C IV (iii) line spread (δv) of the O VI and C IV are strongly correlated (at 5.3σlevel) with δv(O VI) being systematically larger than δv(C IV) and (iv) δv(O VI) and δv(C IV) are also correlated (at > 5σlevel) with their respective column densities and with N(H I) (3 and 4.5 σrespectively). These findings favor the idea that C IV and O VI absorption originate from different phases of a correlated structure and systems with large velocity spread are probably associated with overdense regions. The velocity offset between optical depth weighted redshifts of C IV and O VI absorption is found to be in the range 0 < |Δv (O VI - CIV)| < 48 km/s with a median value of 8 km/s. We compare the properties of O VI systems in our sample with that of low redshift (z < 0.5) samples from the literature and find that (i) the O VI components at low-z are systematically wider than at high-z with an enhanced non-thermal contribution to their b-parameter, (ii) the slope of the column density distribution functions for high and low-z are consistent, (iii) range in gas temperature estimated from a subsample of well aligned absorbers are similar at both high and low-z, and (iv) Ω_{O VI} = (1.0 \pm 0.2) \times10^{-7} for N(O VI) > 10^{13.7} cm^{-2}, estimated in our high-z sample, is very similar to low-z estimations.
description: 21 pages, 16 figures, 9 tables, Accepted for publication in MNRAS
Applications of fuzzy logic to Case-Based Reasoning
Creators: name: Subbotin, Igor Ya.
name: Voskoglou, Michael Gr.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences
subject: I.2.3; I.5.1; H.3
subject: 03E72, 97A99

description: The article discusses some applications of fuzzy logic ideas to formalizing of the Case-Based Reasoning (CBR) process and to measuring the effectiveness of CBR systems
A systematic study of the sensitivity of triangular flow to the initial state fluctuations in relativistic heavy-ion collisions
Creators: name: Petersen, Hannah
name: La Placa, Rolando
name: Bass, Steffen A.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Nuclear Theory (nucl-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: Experimental data from the Relativistic Heavy Ion Collider (RHIC) suggests that the quark gluon plasma behaves almost like an ideal fluid. Due to its short lifetime, many QGP properties can only be inferred indirectly through a comparison of the final state measurements with transport model calculations. Among the current phenomena of interest are the interdependencies between two collective flow phenomena, elliptic and triangular flow. The former is mostly related to the initial geometry and collective expansion of the system whereas the latter is sensitive to the fluctuations of the initial state. For our investigation we use a hybrid transport model based on the Ultra-relativistic Quantum Molecular Dynamics (UrQMD) transport approach using an ideal hydrodynamic expansion for the hot and dense stage. Using UrQMD initial conditions for an Au-Au collision, particles resulting from a collision are mapped into an energy density distribution that is evolved event-by-event with a hydrodynamic calculation. By averaging these distributions over different numbers of events, we have studied how the granularity/smoothness of the distribution affects the initial eccentricity, the initial triangularity, and the resulting flow components. The average elliptic flow in non central collisions is not sensitive to the granularity, while triangular flow is. The triangularity might thus provide a good measure of the amount of initial state fluctuations that is necessary to reproduce the experimental data.
description: 10 pages, 7 figures
The Implications of M Dwarf Flares on the Detection and Characterization of Exoplanets at Infrared Wavelengths
Creators: name: Tofflemire, Benjamin M.
name: Wisniewski, John P.
name: Kowalski, Adam F.
name: Schmidt, Sarah J.
name: Kundurthy, Praveen
name: Hilton, Eric J.
name: Holtzman, Jon A.
name: Hawley, Suzanne L.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: We present the results of an observational campaign which obtained high time cadence, high precision, simultaneous optical and IR photometric observations of three M dwarf flare stars for 47 hours. The campaign was designed to characterize the behavior of energetic flare events, which routinely occur on M dwarfs, at IR wavelengths to milli-magnitude precision, and quantify to what extent such events might influence current and future efforts to detect and characterize extrasolar planets surrounding these stars. We detected and characterized four highly energetic optical flares having U-band total energies of ~7.8x10^30 to ~1.3x10^32 ergs, and found no corresponding response in the J, H, or Ks bandpasses at the precision of our data. For active dM3e stars, we find that a ~1.3x10^32 erg U-band flare (delta Umax ~1.5 mag) will induce <8.3 (J), <8.5 (H), and <11.7 (Ks) milli-mags of a response. A flare of this energy or greater should occur less than once per 18 hours. For active dM4.5e stars, we find that a ~5.1x10^31 erg U-band flare (delta Umax ~1.6 mag) will induce <7.8 (J), <8.8 (H), and <5.1 (Ks) milli-mags of a response. A flare of this energy or greater should occur less than once per 10 hours. No evidence of stellar variability not associated with discrete flare events was observed at the level of ~3.9 milli-mags over 1 hour time-scales and at the level of ~5.6 milli-mags over 7.5 hour time-scales. We therefore demonstrate that most M dwarf stellar activity and flares will not influence IR detection and characterization studies of M dwarf exoplanets above the level of ~5-11 milli-mags, depending on the filter and spectral type. We speculate that the most energetic megaflares on M dwarfs, which occur at rates of once per month, are likely to be easily detected in IR observations with sensitivity of tens of milli-mags.
description: Accepted in Astronomical Journal, 17 pages, 6 figures
Managing the Prospect of Famine: Cape Verdean Officials, Subsistence Emergencies, and the Change of Elite Attitudes During Portugal's Late Colonial Phase, 1939-1961
Creators: name: Keese, Alexander
Publisher: name: Humboldt-Universität zu Berlin, Philosophische Fakultät III
Year: 2012
Subjects: subject: Cape Verde
subject: São Tomé e Príncipe
subject: migration
subject: forced migration
subject: forced labour
subject: plantations
subject: famine
subject: colonialism
subject: Portugal
subject: administrators (Cape Verdean)
subject: decolonization
subject: 900 Geschichte, Geografie und Hilfswissenschaften
subject: 960 Geschichte Afrikas

description: The 1940s were a watershed for the Cape-Verdean Islands. Massive drought and famines destroyed the subsistence base for a large number of the islanders. Thousands died under these conditions, while another large group was driven was has repeatedly become known as forced migration or variant of forced labour (mainly towards São Tomé and Príncipe and Angola). The article discusses the role of a Cape Verdean elite of middle and low-level administrators who became involved in the management of the emergency situation and the organisation of compulsory migration. This elite was initially fully compliant to Portuguese expectations. Later, its members became disenchanted by their own experience of the 1947/48 food emergency, and took their distances from the failures of Portuguese social policy. However, even under the impact of such experiences, Cape Verdean administrators finally redefined their role within the logics of a colonial empire in which they now demanded to take a more responsible function.
State-owned success in the air
Creators: name: Huber, Marie
Publisher: name: Humboldt-Universität zu Berlin
Year: 2022
Subjects: subject: Air Transport
subject: Postcolonial History
subject: State-Owned Enterprises
subject: Africanisation
subject: 650 Management und unterstützende Tätigkeiten

description: African Airlines are not commonly associated with success, rather they recall instances of bad management, security concerns, and outdated machinery. This paper focuses on the success of two airlines during the first two postcolonial decades in Africa. During this time, the new national airlines of African states were important symbols of sovereignty, as well as providing crucial mobility for politicians and experts of all kinds. Addressing a gap in the literature on aviation in Africa on the one hand, and the research on state-owned enterprises on the other, the paper takes a closer look at expectation formation and management decisions regarding fleet modernisation and maintenance, as well as Africanisation politics in both enterprises. Contrary to blanket statements that refer to ideological goals as a reason for the failure of African state-owned enterprise, the political goal of independence made Africanisation of staff and the acquisition of company-owned equipment and facilities a priority. Using archival sources, company publications, and observations of contemporaries, it can be shown that through taking advantage of entangled interests of governments and the aviation industry, the two African airlines managed to break into the global air transport market at the beginning of the 1960s and stayed competitive for many years.
Supplementary Material of the article: "Multi-country and intersectoral assessment of cluster congruence between different bioinformatics pipelines for genomics surveillance of foodborne bacterial pathogens"
Creators: name: Mixão, Verónica
name: Pinto, Miguel
name: Borges, Vitor
Publisher: name: Zenodo
Year: 2025

description: This repository includes the Supplementary Material of the article: "Multi-country and intersectoral assessment of cluster congruence between different bioinformatics pipelines for genomics surveillance of foodborne bacterial pathogens", available as pre-print at medRxiv

The additional files are separated in different folders, according to the topic of the article they cover. Details on each aditional file can be found at Supplementary_Material_description.pdf
13CO(J=1-0) On-the-fly Mapping of the Giant HII Region NGC 604: Variation in Molecular Gas Density and Temperature due to Sequential Star Formation
Creators: name: Muraoka, Kazuyuki
name: Tosaki, Tomoka
name: Miura, Rie
name: Onodera, Sachiko
name: Kuno, Nario
name: Nakanishi, Kouichiro
name: Kaneko, Hiroyuki
name: Komugi, Shinya
Publisher: name: arXiv
Year: 2011
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We present 13CO(J=1-0) line emission observations with the Nobeyama 45-m telescope toward the giant HII region NGC 604 in the spiral galaxy M 33. We detected 13CO(J=1-0) line emission in 3 major giant molecular clouds (GMCs) labeled as GMC-A, B, and C beginning at the north. We derived two line intensity ratios, 13CO(J=1-0)/12CO(J =1-0), R13/12, and 12CO(J=3-2)/12CO(J =1-0), R31, for each GMC at an angular resolution of 25" (100 pc). Averaged values of R13/12 and R31 are 0.06 and 0.31 within the whole GMC-A, 0.11 and 0.67 within the whole GMC-B, and 0.05 and 0.36 within the whole GMC-C, respectively. In addition, we obtained R13/12=0.09\pm0.02 and R31=0.76\pm0.06 at the 12CO(J=1-0) peak position of the GMC-B. Under the Large Velocity Gradient approximation, we determined gas density of 2.8 \times10^3 cm^-3 and kinetic temperature of 33+9-5 K at the 12CO(J=1-0) peak position of the GMC-B. Moreover, we determined 2.5 \times10^3 cm^-3 and 25\pm2 K as averaged values within the whole GMC-B. We concluded that dense molecular gas is formed everywhere in the GMC-B because derived gas density not only at the peak position of the GMC but also averaged over the whole GMC exceeds 10^3 cm^-3. On the other hand, kinetic temperature averaged over the whole GM-B, 25 K, is significantly lower than that at the peak position, 33 K. This is because HII regions are lopsided to the northern part of the GMC-B, thus OB stars can heat only the northern part, including the 12CO(J=1-0) peak position, of this GMC.
description: 16 pages, 7 figures, PASJ in press
Supplementary Material of the article: "Multi-country and intersectoral assessment of cluster congruence between different bioinformatics pipelines for genomics surveillance of foodborne bacterial pathogens"
Creators: name: Mixão, Verónica
name: Pinto, Miguel
name: Borges, Vitor
Publisher: name: Zenodo
Year: 2024

description: This repository includes the Supplementary Material of the article: "Multi-country and intersectoral assessment of cluster congruence between different bioinformatics pipelines for genomics surveillance of foodborne bacterial pathogens", available as pre-print at medRxiv

The additional files are separated in different folders, according to the topic of the article they cover. Details on each aditional file can be found at Supplementary_Material_description.pdf
Incommensurate correlations in the anisotropic triangular Heisenberg lattice
Creators: name: Weichselbaum, Andreas
name: White, Steven R.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We study the anisotropic spin-half antiferromagnetic triangular Heisenberg lattice in two dimensions, seen as a set of chains with couplings J (J') along (in between) chains, respectively. Our focus is on the incommensurate correlation that emerges in this system in a wide parameter range due to the intrinsic frustration of the spins. We study this system with traditional DMRG using cylindrical boundary conditions to least constrain possible incommensurate order. Despite that the limit of essentially decoupled chains J'/J < 0.5 is not very accessible numerically, it appears that the spin-spin correlations remain incommensurate for any finite 0 < J' < Jc', where Jc'/J > 1. The incommensurate wave vector q_J, however, approaches the commensurate value corresponding to the antiferromagnetic correlation of a single chain very rapidly with decreasing J'/J, roughly as q_J ~ pi - c_1 (J'/J)^n exp(-c_2 J/J').
description: 12 pages, 13 figures
title: Sach vocabulary, part 1 of 3
title: Vốn từ vựng tiếng Sách, phần 1/3
title: Vocabulaire sach, partie 1 sur 3
Creators: name: Ferlus, Michel
name: Trần, Trí Dõi
Publisher: name: Pangloss
Year: 2015
Subjects: subject: Linguistique
subject: Sách

description: Sach vocabulary, part 1 of 3; from word item 1 to word item 1179, EFEO-CNRS-SOAS lexicon [from n° 1 to 191.2 following Ferlus's numbering]
description: Vốn từ vựng tiếng Sách, phần 1/3; từ mục từ 1 đến mục từ 1179 trong bảng từ của EFEO-CNRS-SOAS [từ số 1 đến 191.2 theo kí hiệu của Ferlus]
title: Sach vocabulary, part 2 of 3
title: Vốn từ vựng tiếng Sách, phần 2/3
title: Vocabulaire sach, partie 2 sur 3
Creators: name: Ferlus, Michel
name: Trần, Trí Dõi
Publisher: name: Pangloss
Year: 2015
Subjects: subject: Linguistique
subject: Sách

description: Sach vocabulary, part 2 of 3; from word item 1178 to word item 2287, EFEO-CNRS-SOAS lexicon [from n° 191.1 to 393.7 following Ferlus's numbering]
description: Vốn từ vựng tiếng Sách, phần 2/3; từ mục từ 1178 đến mục từ 2287 trong bảng từ của EFEO-CNRS-SOAS [từ số 191.1 đến 393.7 theo kí hiệu của Ferlus]
title: Sach vocabulary, part 3 of 3
title: Vốn từ vựng tiếng Sách, phần 3/3
title: Vocabulaire sach, partie 3 sur 3
Creators: name: Ferlus, Michel
name: Trần, Trí Dõi
Publisher: name: Pangloss
Year: 2015
Subjects: subject: Linguistique
subject: Sách

description: Sach vocabulary, part 3 of 3; from word item 2288 to word item 2896, EFEO-CNRS-SOAS lexicon [from n° 393.8 to 471a following Ferlus's numbering]
description: Vốn từ vựng tiếng Sách, phần 3/3; từ mục từ 2288 đến mục từ 2896 trong bảng từ của EFEO-CNRS-SOAS [từ số 393.8 đến 471a theo kí hiệu của Ferlus]
Perturbative Improvement of the Schrodinger Functional for Lattice Strong Dynamics
Creators: name: Karavirta, T.
name: Rummukainen, K.
name: Tuominen, K.
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: Lattice simulations on SU(2) and SU(3) gauge theories with matter fields in the fundamental, adjoint and two index symmetric representations are needed to determine if these theories are near or within the conformal window as required for their applications in beyond standard model phenomenology. Simulations with Wilson fermion action are subject to artifacts linear in the lattice spacing $a$, and must be improved. We provide the necessary coefficients for perturbative improvement of the boundary terms when using Schrodinger functional boundary conditions and furthermore show that correctly implemented O(a) improved actions are necessary for reliable results.
description: 5 pages, 6 eps figures
Dynamics of black holes in de Sitter spacetimes
Creators: name: Zilhao, Miguel
name: Cardoso, Vitor
name: Gualtieri, Leonardo
name: Herdeiro, Carlos
name: Sperhake, Ulrich
name: Witek, Helvi
Publisher: name: arXiv
Year: 2012
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Nonlinear dynamics in cosmological backgrounds has the potential to teach us immensely about our universe, and also to serve as prototype for nonlinear processes in generic curved spacetimes. Here we report on dynamical evolutions of black holes in asymptotically de Sitter spacetimes. We focus on the head-on collision of equal mass binaries and for the first time compare analytical and perturbative methods with full blown nonlinear simulations. Our results include an accurate determination of the merger/scatter transition (consequence of an expanding background) for small mass binaries and a test of the Cosmic Censorship conjecture, for large mass binaries. We observe that, even starting from small separations, black holes in large mass binaries eventually lose causal contact, in agreement with the conjecture.
description: 6 pages, 5 figures
Simulations of Bunch Merging in a Beta Beam Decay Ring
Creators: name: Heinrich, Daniel Christopher
name: Hansen, Christian
name: Chance, Antoine
Publisher: name: arXiv
Year: 2011
Subjects: subject: Accelerator Physics (physics.acc-ph)
subject: FOS: Physical sciences

description: To further study neutrino oscillation properties a Beta Beam facility has been proposed. Beta decaying ions with high kinetic energy are stored in a storage ring ("Decay Ring") with straight sections to create pure focused (anti) electron neutrino beams. However to reach high sensitivity to neutrino oscillation parameters in the experiment the bunched beam intensity and duty cycle in the DR have to be optimized. The first CERN-based scenario, using 6He and 18Ne as neutrino sources, has been studied using a bunch merging RF scheme. Two RF cavities at different frequencies are used to capture newly injected bunches and then merge them into the stored bunches. It was shown that this scheme could satisfy the requirements on intensity and duty cycle set by the experiment. This merging scheme has now been revised with new simulation software providing new results for 6He and 18Ne. Furthermore bunch merging has been studied for the second CERN-based scenario using 8Li and 8B.
description: NUFACT10, 3 pages, 3 figures
Characterizing price index behavior through fluctuation dynamics
Creators: name: Panigrahi, Prasanta K.
name: Ghosh, Sayantan
name: Banerjee, Arjun
name: Bahadur, Jainendra
name: Manimaran, P.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Statistical Finance (q-fin.ST)
subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: FOS: Economics and business
subject: FOS: Physical sciences

description: We study the nature of fluctuations in variety of price indices involving companies listed on the New York Stock Exchange. The fluctuations at multiple scales are extracted through the use of wavelets belonging to Daubechies basis. The fact that these basis sets satisfy vanishing moments conditions makes them ideal to extract local polynomial trends, through the low pass or `average coefficients'. Subtracting the trends from the original time series yields the fluctuations, at different scales, depending on the level of low-pass coefficients used for finding the `average behavior'. The fluctuations are then studied using wavelet based multifractal detrended fluctuation analysis to analyze their self-similar and non-statistical properties. Due to the multifractality of such time series, they deviate from Gaussian behavior in different frequency regimes. Their departure from random matrix theory predictions in such regimes is also analyzed. These deviations and non-statistical properties of the fluctuations can be instrumental in throwing significant light on the dynamics of financial markets.
Which tools are used to measure attributes of sustainable agricultural practices?
Creators: name: GODRICH, Stephanie
name: Voisin, Rebecca
name: Devine, Amanda
name: HORWITZ, Pierre
name: Sambell, Ros
name: BLAKE, Dave
name: JOYCE, Janine
name: HERRINGTON, Saranne
name: HOPKINS, Anna
Publisher: name: Open Science Framework
Year: 2022
Subjects: subject: Physical Sciences and Mathematics
subject: Agriculture
subject: Life Sciences
subject: Social and Behavioral Sciences
subject: #agriculturalimplements
subject: #assessment
subject: #farmmetric
subject: #framework
subject: #metric
subject: #permaculture
subject: #regenerativeagriculture
subject: #sustainableagriculture

description: According to the Food and Agriculture Organization, sustainable agriculture supports nutritious food is accessible for everyone. It also ensures the environment is protected to enable it to support future population needs. Key principles include increasing productivity, employment and value; environmental protection; improvement of livelihoods; increasing resiliency of humans; supporting governance transition (FAO, 2022). FAO asserts that sustainable agriculture incorporates social, economic and environmental domains (FAO, 2021). The FAO's vision for sustainable food and agriculture is "that of a world in which food is nutritious and accessible for everyone and natural resources are managed in a way that maintain ecosystem functions to support current as well as future human needs. In our vision, farmers, pastoralists, fisher-folks, foresters and other rural dwellers have the opportunity to actively participate in, and benefit from, economic development, have decent employment condition and work in a fair price environment. Rural women, men, and communities live in security, and have control over their livelihoods and equitable access to resources which they use in an efficient way." This review’s objective is to identify global tools measuring attributes of sustainable agricultural practices, incorporating constructs such as economic, nutritional, social and environmental dimensions. The research question is: Which tools are used to measure attributes of sustainable agricultural practices?
A Suzaku View of Cyclotron Line Sources and Candidates
Creators: name: Pottschmidt, K.
name: Suchy, S.
name: Rivers, E.
name: Rothschild, R. E.
name: Marcu, D. M.
name: Barragán, L.
name: Kühnel, M.
name: Fürst, F.
name: Schwarm, F.
name: Kreykenbohm, I.
name: Wilms, J.
name: Schönherr, G.
name: Caballero, I.
name: Camero-Arranz, A.
name: Bodaghee, A.
name: Doroshenko, V.
name: Klochkov, D.
name: Santangelo, A.
name: Staubert, R.
name: Kretschmar, P.
name: Wilson-Hodge, C.
name: Finger, M. H.
name: Terada, Y.
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Seventeen accreting neutron star pulsars, mostly high mass X-ray binaries with half of them Be-type transients, are known to exhibit Cyclotron Resonance Scattering Features (CRSFs) in their X-ray spectra, with characteristic line energies from 10 to 60 keV. To date about two thirds of them, plus a few similar systems without known CRSFs, have been observed with Suzaku. We present an overview of results from these observations, including the discovery of a CRSF in the transient 1A 1118-61 and pulse phase resolved spectroscopy of GX 301-2. These observations allow for the determination of cyclotron line parameters to an unprecedented degree of accuracy within a moderate amount of observing time. This is important since these parameters vary - e.g., with orbital phase, pulse phase, or luminosity - depending on the geometry of the magnetic field of the pulsar and the properties of the accretion column at the magnetic poles. We briefly introduce a spectral model for CRSFs that is currently being developed and that for the first time is based on these physical properties. In addition to cyclotron line measurements, selected highlights from the Suzaku analyses include dip and flare studies, e.g., of 4U 1907+09 and Vela X-1, which show clumpy wind effects (like partial absorption and/or a decrease in the mass accretion rate supplied by the wind) and may also display magnetospheric gating effects.
description: 8 pages, 5 figures, 1 table, to appear in the proceedings of the conference "Suzaku 2011 Exploring the X-ray Universe: Suzaku and Beyond" which will be published electronically by AIP
Unusual linewidth dependence of coherent THz emission measured from intrinsic Josephson junction stacks in the hot-spot regime
Creators: name: Li, M. Y.
name: Yuan, J.
name: Kinev, N.
name: Li, J.
name: Gross, B.
name: Guenon, S.
name: Ishii, A.
name: Hirata, K.
name: Hatano, T.
name: Koelle, D.
name: Kleiner, R.
name: Koshelets, V. P.
name: Wang, H. B.
name: Wu, P. H.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: We report on measurements of the linewidth Δf of THz radiation emitted from intrinsic Josephson junction stacks, using a Nb/AlN/NbN integrated receiver for detection. Previous resolution limited measurements indicated that Δf may be below 1 GHz - much smaller than expected from a purely cavity-induced synchronization. While at low bias we found Δf to be not smaller than ? 500 MHz, at high bias, where a hotspot coexists with regions which are still superconducting, Δf turned out to be as narrow as 23 MHz. We attribute this to the hotspot acting as a synchronizing element. Δf decreases with increasing bath temperature, a behavior reminiscent of motional narrowing in NMR or ESR, but hard to explain in standard electrodynamic models of Josephson junctions.
description: 4 figures, 5 pages
Constraints on Universal Extra Dimension models with gravity mediated decays from ATLAS diphoton search
Creators: name: Ghosh, Kirtiman
name: Huitu, Katri
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We discuss the collider phenomenology of Universal Extra Dimension models with gravity mediated decays. We concentrate on diphoton associated with large missing transverse energy signature. At the collider, level-1 Kaluza-Klein (KK) particles are produced in pairs due to the conservation of KK-parity. Subsequently, KK-particles decay via cascades involving lighter KK-particles until reaching the lightest KK-particle (LKP). Finally, gravity induced decay of the LKP into photons gives rise to the diphoton signature. The search for diphoton events with large missing transverse energy was recently communicated by the ATLAS collaboration for 7 TeV center-of-mass energy and 3.1 inverse femtobarn integrated luminosity of the Large Hadron Collider. Above the Standard Model background prediction, no excess of such events was reported. We translate the absence of any excess of the diphoton events to constrain the model parameters, namely, the radius of compactification (R) and the fundamental Planck mass ($M_D$).
description: 24 pages, 10 figures
On optical forces in spherical whispering gallery mode resonators
Creators: name: Rubin, J. T.
name: Deych, L.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Optics (physics.optics)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: In this paper we discuss the force exerted by the field of an optical cavity on a polarizable dipole. We show that the modification of the cavity modes due to interaction with the dipole significantly alters the properties of the force. In particular, all components of the force are found to be non-conservative, and cannot, therefore, be derived from a potential energy. We also suggest a simple generalization of the standard formulas for the optical force on the dipole, which reproduces the results of calculations based on the Maxwell stress tensor.
description: To pe published in Optics Express Focus Issue: "Collective phenomena in photonic, plasmonic and hybrid structures"
title: Vocabulary list for Lang Lo dialect of the Tho language in Nghia Dan, part 1 of 3
title: Vocabulaire thổ de Làng Lỡ, partie 1/3
title: Vốn từ vựng thổ ngữ tiếng Thổ ở Làng Lỡ, Nghĩa Đàn, phần 1/3
Creators: name: Ferlus, Michel
name: Trần, Trí Dõi
Publisher: name: Pangloss
Year: 2015
Subjects: subject: Linguistique
subject: Thổ

description: Vocabulary list for Lang Lo dialect of the Tho language in Nghia Dan, from word item 1 to word item 1073, EFEO-CNRS-SOAS lexicon [from n° 1 to 176.6 following Ferlus's numbering]
description: Từ vựng thổ ngữ tiếng Thổ ở Làng Lỡ, huyện Nghĩa Đàn; từ mục từ 1 đến mục từ 1073 trong bảng từ của EFEO-CNRS-SOAS [từ số 1 đến 176.6 theo kí hiệu của Ferlus]