cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Hall-Littlewood polynomials and characters of affine Lie algebras
Creators: name: Bartlett, Nick
name: Warnaar, S. Ole
Publisher: name: arXiv
Year: 2013
Subjects: subject: Combinatorics (math.CO)
subject: Quantum Algebra (math.QA)
subject: Representation Theory (math.RT)
subject: FOS: Mathematics
subject: 05E05, 05E10, 17B67, 33D67

description: The Weyl-Kac character formula gives a beautiful closed-form expression for the characters of integrable highest-weight modules of Kac-Moody algebras. It is not, however, a formula that is combinatorial in nature, obscuring positivity. In this paper we show that the theory of Hall-Littlewood polynomials may be employed to prove Littlewood-type combinatorial formulas for the characters of certain highest weight modules of the affine Lie algebras C_n^{(1)}, A_{2n}^{(2)} and D_{n+1}^{(2)}. Through specialisation this yields generalisations for B_n^{(1)}, C_n^{(1)}, A_{2n-1}^{(2)}, A_{2n}^{(2)} and D_{n+1}^{(2)} of Macdonald's identities for powers of the Dedekind eta-function. These generalised eta-function identities include the Rogers-Ramanujan, Andrews-Gordon and Göllnitz-Gordon q-series as special, low-rank cases.
description: 33 pages, proofs of several conjectures from the earlier version have been included
Identification and properties of intense star-forming galaxies at redshifts z>10
Creators: name: Robertson, B. E.
name: Tacchella, S.
name: Johnson, B. D.
name: Hainline, K.
name: Whitler, L.
name: Eisenstein, D. J.
name: Endsley, R.
name: Rieke, M.
name: Stark, D. P.
name: Alberts, S.
name: Dressler, A.
name: Egami, E.
name: Hausen, R.
name: Rieke, G.
name: Shivaei, I.
name: Williams, C. C.
name: Willmer, C. N. A.
name: Arribas, S.
name: Bonaventura, N.
name: Bunker, A.
name: Cameron, A. J.
name: Carniani, S.
name: Charlot, S.
name: Chevallard, J.
name: Curti, M.
name: Curtis-Lake, E.
name: D'Eugenio, F.
name: Jakobsen, P.
name: Looser, T. J.
name: Lützgendorf, N.
name: Maiolino, R.
name: Maseda, M. V.
name: Rawle, T.
name: Rix, H. -W.
name: Smit, R.
name: Übler, H.
name: Willott, C.
name: Witstok, J.
name: Baum, S.
name: Bhatawdekar, R.
name: Boyett, K.
name: Chen, Z.
name: de Graaff, A.
name: Florian, M.
name: Helton, J. M.
name: Hviding, R. E.
name: Ji, Z.
name: Kumari, N.
name: Lyu, J.
name: Nelson, E.
name: Sandles, L.
name: Saxena, A.
name: Suess, K. A.
name: Sun, F.
name: Topping, M.
name: Wallace, I. E. B.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Surveys with James Webb Space Telescope (JWST) have discovered candidate galaxies in the first 400 Myr of cosmic time. Preliminary indications have suggested these candidate galaxies may be more massive and abundant than previously thought. However, without confirmed distances, their inferred properties remain uncertain. Here we identify four galaxies located in the JWST Advanced Deep Extragalactic Survey (JADES) Near-Infrared Camera (NIRCam) imaging with photometric redshifts z~10-13. These galaxies include the first redshift z>12 systems discovered with distances spectroscopically confirmed by JWST in a companion paper. Using stellar population modelling, we find the galaxies typically contain a hundred million solar masses in stars, in stellar populations that are less than one hundred million years old. The moderate star formation rates and compact sizes suggest elevated star formation rate surface densities, a key indicator of their formation pathways. Taken together, these measurements show that the first galaxies contributing to cosmic reionisation formed rapidly and with intense internal radiation fields.
description: Author version of manuscript, please visit Nature Astronomy for the version published 04 April 2023
Common Sanitary Practices of the Residents in Purok Lizada Beach, Lizada, Toril
Creators: name: Tariao, Melvert
name: Montebon, Jevy Albino
name: Jabasa, Jamaica Melocoton
name: Arieta, Michael Jan
name: Cabreros, Rica
name: Inutan, Michael John
Publisher: name: figshare
Year: 2021
Subjects: Occupational and workplace health and safety
Public health not elsewhere classified

description: This study aimed to determine the common sanitary practices of Purok Lizada Beach in Barangay Lizada, Toril District, Davao City, Philippines. It involved a descriptive-quantitative method of research whose respondents were selected through a random sampling technique. A modified and adapted questionnaire was administered to 287 respondents. Results revealed a very high manifestation of personal hygiene and household sanitation with a mean of 4.36 and 4.35; while solid and human waste disposal and food and water sanitation obtained a high manifestation with a mean of 3.79 and 3.71. Personal hygiene indicator garnered the highest mean average, generally implies that this was practiced all of the time. The findings recognized that the residents commonly used groundwater and 2% of them never used toilet, soap, and water when defecating. Numerous sanitary practices were not manifested at all times, suggesting that health sectors and sanitation professionals should concentrate on helping people to improve their sanitation through nurturing information literacy, increasing awareness, and upgrading sanitary facilities with considerations on the cause-and-effect relationship between these practices and personal preferences concerning behavioral change.
Reflections on the hyperbolic plane
Creators: name: Lecian, Orchidea Maria
Publisher: name: arXiv
Year: 2013
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The most general solution to the Einstein equations in $4=3+1$ dimensions in the asymptotical limit close to the cosmological singularity under the BKL (Belinski-Khalatnikov-Lifshitz) hypothesis, for which space gradients are neglected and time derivatives only are considered, can be visualized by the behavior of a billiard ball in a triangular domain on the Upper Poincaré Half Plane (UPHP). The behavior of the billiard system (named 'big billiard') can be schematized by dividing the succesions of trajectories according to Poincaré return map on the sides of the billiard table, according to the paradigms implemented by the BKL investigation and by the CB-LKSKS (Chernoff- Barrow- Lifshitz- Khalatnikov- Sinai- Khanin- Shchur) one. Different maps are obtained, according to different symmetry-quotienting mechanisms used to analyze the dynamics according to the symmetries of the billiard domain and to the features of the geodesics on the UPHP. In the inhomogenous case, new structures have been uncovered, such that, in this framework, the billiard table (named 'small billiard') consists of 1/6 of the previous one. The connections between the symmetry-quotienting mechanisms are further investigated on the UPHP. The relation between the complete billiard and the small billiard are also further explained according to the role of Weyl reflections. The quantum properties of the system are sketched as well, and the physical interpretation of the wavefunction is further developped. In particular, a physical interpretation for the symmetry-quotienting maps is proposed, according to the Fourier decomposition of the energy levels of the wavefunction of the universe, as far as the meaning of epochs and eras is concerned from a quantum point of view.
description: matches the published version; results unchanged; references added; new sections with further discussion added; 37 pages; 5 tables; 5 figures
A method for analysing phosphatase activity in aquatic bacteria at the single cell level using flow cytometry
Creators: name: Duhamel, Solange
name: Gregori, Gerald
name: Van Wambeke, France
name: Mauriac, Romain
name: Nedoma, Jiří
Publisher: name: Columbia University
Year: 2008
Subjects: Biogeochemistry
Phosphatases
Bacteria
Flow cytometry

description: It has been demonstrated that ELF97-phosphate (ELF-P) is a useful tool to detect and quantify phosphatase activity of phytoplankton populations at a single cell level. Recently, it has been successfully applied to marine heterotrophic bacteria in culture samples, the cells exhibiting phosphatase activity being detected using epifluorescence microscopy. Here, we describe a new protocol that enables the detection of ELF alcohol (ELFA), the product of ELF-P hydrolysis, allowing the detection of phosphatase positive bacteria, using flow cytometry. Bacteria from natural samples must be disaggregated and, in oligotrophic waters, concentrated before they can be analyzed by flow cytometry. The best efficiency for disaggregating/separating bacterial cell clumps was obtained by incubating the sample for 30 min with Tween 80 (10 mg l− 1, final concentration). A centrifugation step (20,000 g; 30 min) was required in order to recover all the cells in the pellet (only 7 ± 2% of the cells were recovered from the supernatant). The cells and the ELFA precipitates were resistant to these treatments. ELFA-labelled samples were stored in liquid nitrogen for up to four months before counting without any significant loss in total or ELFA-labelled bacterial cell abundance or in the ELFA fluorescence intensity. We describe a new flow cytometry protocol for detecting and discriminating the signals from both ELFA and different counterstains (4',6-diamidino-2-phenylindole (DAPI) and propidium iodide (PI)) necessary to distinguish between ELFA-labelled and non ELFA-labelled heterotrophic bacteria. The method has been successfully applied in both freshwater and marine samples. This method promises to improve our understanding of the physiological response of heterotrophic bacteria to P limitation.
A tale of two (or more) $h$'s
Creators: name: Brieden, Samuel
name: Gil-Marín, Héctor
name: Verde, Licia
Publisher: name: arXiv
Year: 2022
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We use the large-scale structure galaxy data (LSS) from the BOSS and eBOSS surveys, in combination with abundances information from Big Bang Nucleosynthesis (BBN) to measure two values of the Hubble expansion rate, $H_0=100h\,[{\rm km}\, {\rm s}^{-1}\,{\rm Mpc}^{-1}]$, each of them based on very different physical processes. One is a (traditional) late-time-background measurement based on determining the BAO scale and using BBN abundances on baryons for calibrating its absolute size (BAO+BBN). This method anchors $H_0$ to the (standard) physics of the sound horizon scale at pre-recombination times. The other is a newer early-time based measurement associated with the broadband shape of the power spectrum. This second method anchors $H_0$ to the physics of the matter-radiation equality scale, which also needs BBN information for determining the suppression of baryons in the power spectrum shape (shape+BBN). Within the $Λ$CDM model, we find very good consistency among these two $H_0$'s: BAO+BBN (+growth) delivers $H_0=67.42_{-0.94}^{+0.88}$ $(67.37_{-0.95}^{+0.86})$ km s$^{-1}$Mpc$^{-1}$ , whereas the shape+BBN (+growth) delivers $H_0 = 70.1_{-2.1}^{+2.1}$ $(70.1_{-2.1}^{+1.9})$ km s$^{-1}$ Mpc$^{-1}$, where "growth" stands for information from the late-time-perturbations captured by the growth of structure parameter. These are the tightest sound-horizon free $H_0$ constraints from LSS data to date. As a consequence to be viable, any $Λ$CDM extension proposed to address the so-called "Hubble tension" needs to modify consistently not only the sound horizon scale physics, but also the matter-radiation equality scale, in such a way that both late- and early-based $H_0$'s return results mutually consistent and consistent with the high $H_0$ value recovered by the standard cosmic distance ladder (distance-redshift relation) determinations.
description: 42 pages, 12 figures, 3 tables, Ccmments welcome, v2 matches accepted version
Equating Schur Functions
Creators: name: Morozov, A.
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We wonder if there is a way to make all Schur functions in all representations equal. This is impossible for fixed value of time variables, but can be achieved for averages. It appears that the corresponding measure is just Gaussian in times, which are all independent. The generating function for the number of Young diagrams does not straightforwardly appear as a product, but is reproduced in a non-trivial way.
description: 3 pages
Hausurnen oder Speicherurnen? Vorgetragen in der Bonner Anthropologischen Gesellschaft am 24. Februar 1927
Creators: name: Oelmann, Franz
Publisher: name: Bonner Jahrbücher
Year: 2017

description: [nicht vorhanden / not available]
description: Bonner Jahrbücher, Bd. 134 (1929): Bonner Jahrbücher : Jahrbücher des Vereins von Altertumsfreunden im Rheinlande
Conservación en la memoria histórica de la toma de la residencia del embajador de Japón (1996)
Creators: name: Delgado Del Aguila, Jesús Miguel
Publisher: name: figshare
Year: 2022
Subjects: History of ideas

description: Delgado Del Aguila, Jesús Miguel (2022). «Conservación en la memoria histórica de la toma de la residencia del embajador de Japón (1996)», en: Revista Estudios Digital. Año 10, n.° 27, diciembre, pp. 61-76. Guatemala: Universidad de San Carlos de Guatemala. Disponible en https://doi.org/10.5281/zenodo.7412361
Distributed allocation of mobile sensing swarms in gyre flows
Creators: name: Mallory, Kenneth
name: Hsieh, M. Ani
name: Forgoston, Eric
name: Schwartz, Ira B.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Pattern Formation and Solitons (nlin.PS)
subject: FOS: Physical sciences

description: We address the synthesis of distributed control policies to enable a swarm of homogeneous mobile sensors to maintain a desired spatial distribution in a geophysical flow environment, or workspace. In this article, we assume the mobile sensors (or robots) have a "map" of the environment denoting the locations of the Lagrangian coherent structures or LCS boundaries. Based on this information, we design agent-level hybrid control policies that leverage the surrounding fluid dynamics and inherent environmental noise to enable the team to maintain a desired distribution in the workspace. We establish the stability properties of the ensemble dynamics of the distributed control policies. Since realistic quasi-geostrophic ocean models predict double-gyre flow solutions, we use a wind-driven multi-gyre flow model to verify the feasibility of the proposed distributed control strategy and compare the proposed control strategy with a baseline deterministic allocation strategy. Lastly, we validate the control strategy using actual flow data obtained by our coherent structure experimental testbed.
description: 10 pages, 14 Figures, added references
title: Επίλυση του προβλημάτων ρ-μέσων και χωροθέτησης εγκαταστάσεων περιορισμένης χωρητικότητας με τον αλγόριθμο βελτιστοποίησης αποικίας μυρμηγκιών
Creators: name: Ξυδιάς Γεώργιος
Publisher: name: Technical University of Crete
Year: 2012

description: Μη διαθέσιμο
Branching random tessellations with interaction: A thermodynamic view
Creators: name: Georgii, Hans-Otto
name: Schreiber, Tomasz
name: Thäle, Christoph
Publisher: name: arXiv
Year: 2013
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics

description: A branching random tessellation (BRT) is a stochastic process that transforms a coarse initial tessellation of $\mathbb{R}^d$ into a finer tessellation by means of random cell divisions in continuous time. This concept generalises the so-called STIT tessellations, for which all cells split up independently of each other. Here, we allow the cells to interact, in that the division rule for each cell may depend on the structure of the surrounding tessellation. Moreover, we consider coloured tessellations, for which each cell is marked with an internal property, called its colour. Under a suitable condition, the cell interaction of a BRT can be specified by a measure kernel, the so-called division kernel, that determines the division rules of all cells and gives rise to a Gibbsian characterisation of BRTs. For translation invariant BRTs, we introduce an "inner" entropy density relative to a STIT tessellation. Together with an inner energy density for a given "moderate" division kernel, this leads to a variational principle for BRTs with this prescribed kernel, and further to an existence result for such BRTs.
description: Published at http://dx.doi.org/10.1214/14-AOP923 in the Annals of Probability (http://www.imstat.org/aop/) by the Institute of Mathematical Statistics (http://www.imstat.org)
Monopoles and confinement in three dimensions from holography
Creators: name: Faedo, Antón F.
name: Hoyos, Carlos
name: Subils, Javier G.
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study the phase diagram of a confining three-dimensional $\mathcal{N}=1$ supersymmetric $\text{U}(N)\times\text{U}(N+M)$ theory with holographic dual corresponding to a known string theory solution. The theory possesses a global $\text{U}(1)$ symmetry under which magnetic monopoles are charged. We introduce both temperature and an external magnetic field for monopoles and find that there are deconfinement phase transitions as any of the two is increased, supporting monopole condensation as the possible mechanism for confinement. We find that the transition as the magnetic field is increased is second order, providing the first example in holographic duals of a deconfinement transition which is not first order. We also uncover a rich structure in the phase diagram, with a triple point and a critical point where a line of first order transitions end.
description: 27 pages + appendices, 11 figures. Expansions available at https://subils.me/resources/poliakov-confinement-at-strong-coupling/
Urnenfelder in Westeuropa. Nachtrag zu Bonn. Jb. 131, S. 154 ff.
Creators: name: Kraft, Georg
Publisher: name: Bonner Jahrbücher
Year: 2017

description: [nicht vorhanden / not available]
description: Bonner Jahrbücher, Bd. 134 (1929): Bonner Jahrbücher : Jahrbücher des Vereins von Altertumsfreunden im Rheinlande
Carbon and phosphate incorporation rates of microbial assemblages in contrasting environments in the Southeast Pacific
Creators: name: Duhamel, Solange
name: Moutin, Thierry
Publisher: name: Columbia University
Year: 2009
Subjects: Biogeochemistry
Marine microbiology
Chlorophyll
Phosphates
Carbon

description: Size-fractionated chlorophyll a (chl a) was determined along with carbon (C) and phosphate (P) incorporation rates over a west-east transect in the Southeast Pacific (between 146.36°W and 72.49°W). A clear longitudinal gradient was observed for both chl a and C and P incorporation rates from the productive areas, near the Marquesas Islands and the Chilean upwelling, to the hyperoligotrophic area associated with the central part of the Southeast Pacific Gyre (SPG). The 0.2–0.6 µm fraction represented 15 to 43% (29 ± 7% mean ± SD, n = 24) of the P incorporation rate along the transect, suggesting that heterotrophic bacteria were important factors in the P cycle as dissolved inorganic P consumers. Small-sized cells (<2 µm) formed the bulk of chl a biomass (69 ± 4%) and accounted for 49 ± 7% of total primary production in the SPG. In contrast, large phytoplankton (>2 µm) accounted for a significantly larger fraction of the total primary production, despite having lower chl a biomass and P incorporation rates. Consequently, larger cells presented higher photosynthetic efficiency values than the smaller phytoplankton. The C:P incorporation rate ratios exhibited increasing deviation from the canonical stoichiometric ratios of 106 and 50 (for phytoplankton and heterotrophic bacteria, respectively) towards the centre of the SPG. We propose hypotheses to explain these deviations.
Failure Mode and Effects Analysis (FMEA) for Experimental Use of FLASH on a Clinical Accelerator
Creators: name: Rahman, Mahbubur
name: Zhang, Rongxiao
name: Gladstone, David J.
name: Williams, Benjamin B.
name: Chen, Erli
name: Dexter, Chad A.
name: Thompson, Lawrence
name: Bruza, Petr
name: Pogue, Brian W.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Medical Physics (physics.med-ph)
subject: FOS: Physical sciences

description: Background: Use of a linear accelerator in ultra-high dose rate (UHDR) mode can provide a conduit for wider access to UHDR FLASH effects, sparing normal tissue, but care needs to be taken in the use of such systems to ensure errors are minimized. Purpose: Failure Modes and Effects Analysis (FMEA) was carried out in a team that has been involved in converting a LINAC between clinical use and UHDR experimental mode for more than one year, following the proposed methods of TG100. Methods: A team of 9 professionals with extensive experience were polled to outline the process map and workflow for analysis, and developed fault trees for potential errors, as well as failure modes that would results. The team scored the categories of severity magnitude (S), occurrence likelihood (O), and detectability potential (D) in a scale of 1 to 10, so that a risk priority number (RPN=S*O*D) could be assessed for each. Results: A total of 46 potential failure modes were identified, including 5 with RPN>100. These failure modes involved 1) patient set up, 2) gating mechanisms in delivery, and 3) detector in the beam stop mechanism. Identified methods to mitigate errors included 1) use of a checklist post conversion, 2) use of robust radiation detectors, 3) automation of QA and beam consistency checks, and 4) implementation of surface guidance during beam delivery. Conclusions: The FMEA process was considered critically important in this setting of a new use of a LINAC, and the expert team developed a higher level of confidence in the ability to safely move UHDR LINAC use towards expanded research access.
description: 26 Pages, 6 Figures, 4 Tables
Bericht über die Tätigkeit des Provinzialmuseums in Bonn in der Zeit vom 1. 4. 1928 bis 31. 3. 1929
Creators: name: Lehner, Hans
name: Oelmann, Franz
name: Hagen, Josef
Publisher: name: Bonner Jahrbücher
Year: 2017

description: [nicht vorhanden / not available]
description: Bonner Jahrbücher, Bd. 134 (1929): Bonner Jahrbücher : Jahrbücher des Vereins von Altertumsfreunden im Rheinlande
Tonpfeifenfunde aus der Grabung Kapuzinergasse in Breisach am Rhein
Creators: name: Duco, Don
name: Schmaedecke, Michael
Publisher: name: Fundberichte aus Baden-Württemberg
Year: 2017

description: [nicht vorhanden / not available]
description: Fundberichte aus Baden-Württemberg, Bd. 13 (1988): Fundberichte aus Baden-Württemberg
Influence of Defects on the Valley Polarization Properties of Monolayer MoS$_{2}$ Grown by Chemical Vapor Deposition
Creators: name: Mujeeb, Faiha
name: Chakrabarti, Poulab
name: Mahamiya, Vikram
name: Shukla, Alok
name: Dhar, Subhabrata
Publisher: name: arXiv
Year: 2022
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Here, the underlying mechanisms behind valley de-polarization is investigated in chemical vapor deposited 1L-MoS$_{2}$. Temperature dependent polarization resolved photoluminescence spectroscopy was carried out on as-grown, transferred and capped samples. It has been found that the momentum scattering of the excitons due to the sulfur-vacancies attached with air-molecule defects has a strong influence on the valley de-polarization process. Our study reveals that at sufficiently low densities of such defects and temperatures, long range electron-hole exchange mediated intervalley transfer due to momentum scattering via Maialle-Silva-Sham (MSS) mechanism of excitons is indeed the most dominant spin-flip process as suggested by T. Yu et al. The rate of momentum scattering of the excitons due to these defects is found to be proportional to the cube root of the density of the defects. Intervalley transfer process of excitons involving $Γ$-valley also has significance in the valley de-polarization process specially when the layer has tensile strain or high density of $V_S$ defects as these perturbations reduce $K$ to $Γ$-energy separation. Band-structural calculations carried out within the density functional theory framework validate this finding. Experimental results further suggest that exchange interactions with the physisorbed air molecules can also result in the intervalley spin-flip scattering of the excitons, and this process gives an important contribution to valley depolarization, specially at the strong scattering regime.
A Distribution of Large Particles in the Coma of Comet 103P/Hartley 2
Creators: name: Kelley, Michael S.
name: Lindler, Don J.
name: Bodewits, Dennis
name: A'Hearn, Michael F.
name: Lisse, Carey M.
name: Kolokolova, Ludmilla
name: Kissel, Jochen
name: Hermalyn, Brendan
Publisher: name: arXiv
Year: 2013
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: The coma of comet 103P/Hartley 2 has a significant population of large particles observed as point sources in images taken by the Deep Impact spacecraft. We measure their spatial and flux distributions, and attempt to constrain their composition. The flux distribution of these particles implies a very steep size distribution with power-law slopes ranging from -6.6 to -4.7. The radii of the particles extend up to 20 cm, and perhaps up to 2 m, but their exact sizes depend on their unknown light scattering properties. We consider two cases: bright icy material, and dark dusty material. The icy case better describes the particles if water sublimation from the particles causes a significant rocket force, which we propose as the best method to account for the observed spatial distribution. Solar radiation is a plausible alternative, but only if the particles are very low density aggregates. If we treat the particles as mini-nuclei, we estimate they account for <16-80% of the comet's total water production rate (within 20.6 km). Dark dusty particles, however, are not favored based on mass arguments. The water production rate from bright icy particles is constrained with an upper limit of 0.1 to 0.5% of the total water production rate of the comet. If indeed icy with a high albedo, these particles do not appear to account for the comet's large water production rate. production rate. Erratum: We have corrected the radii and masses of the large particles of comet 103P/Hartley 2 and present revised conclusions in the attached erratum.
description: Original article: 46 pages, 17 figures, 5 tables, published in Icarus. Erratum: 5 pages, 1 table, accepted for publication in Icarus
Alkaline phosphatase activity and regulation in the North Pacific Subtropical Gyre
Creators: name: Duhamel, Solange
name: Dyhrman, Sonya T.
name: Karl, David M.
Publisher: name: Columbia University
Year: 2010
Subjects: Biogeochemistry
Marine microbiology
Alkaline phosphatase
Marine plankton

description: Alkaline phosphatase (AP) activity (APA) was measured at several stations in the North Pacific Subtropical Gyre in July 2008, and in a series of nutrient addition experiments: nitrate plus ammonium (+N) or phosphate (+P), to study APA regulation and to evaluate the capacity of picoplankton organisms (i.e., in the 0.2–2‐µm size range) to access the AP‐hydrolyzable fraction of dissolved organic phosphorus (DOP). The data indicated a primary limitation of the biomass by nitrogen. Both total (measured with a soluble DOP analog) and cell‐specific (measured with the enzyme‐labeled fluorescence [ELF] phosphate cell labeling method) APA were enhanced in the +N samples and reduced in the +P samples, suggesting that DOP is an important resource for picoplankton nutrition. Cell‐free APA represented > 65% of the APA in all samples, but its contribution to total APA significantly decreased in the +N treatment as microbial biomass increased. In the +N treatment, < 5% and up to 96% of the cells in the heterotrophic bacteria‐enriched and picophytoplankton‐enriched fractions, espectively, were ELF‐alcohol‐labeled after 5 d. Following N enrichment, the microbial assemblage shifted from cell‐free phosphatase dominated under N limitation and P stress (i.e., physiological response) to picophytoplankton‐based phosphatase dominated under P limitation (i.e., production or growth rate limitation). If, as predicted, the ocean evolves towards P limitation, DOP availability would become of major importance to sustain productivity.
Expanding Ricci Solitons Asymptotic to Cones
Creators: name: Chodosh, Otis
Publisher: name: arXiv
Year: 2013
Subjects: subject: Differential Geometry (math.DG)
subject: FOS: Mathematics

description: We show that an expanding gradient Ricci solitons which is asymptotic to a cone at infinity in a certain sense must be rotationally symmetric.
description: Final version
Extending 3-DoF Metrics to Model User Behaviour Similarity in 6-DoF Immersive Applications
Creators: name: Rossi, Silvia
name: Viola, Irene
name: Toni, Laura
name: Cesar, Pablo
Publisher: name: arXiv
Year: 2021
Subjects: subject: Human-Computer Interaction (cs.HC)
subject: Multimedia (cs.MM)
subject: FOS: Computer and information sciences

description: Immersive reality technologies, such as Virtual and Augmented Reality, have ushered a new era of user-centric systems, in which every aspect of the coding--delivery--rendering chain is tailored to the interaction of the users. Understanding the actual interactivity and behaviour of the users is still an open challenge and a key step to enabling such a user-centric system. Our main goal is to extend the applicability of existing behavioural methodologies for studying user navigation in the case of 6 Degree-of-Freedom (DoF). Specifically, we first compare the navigation in 6-DoF with its 3-DoF counterpart highlighting the main differences and novelties. Then, we define new metrics aimed at better modelling behavioural similarities between users in a 6-DoF system. We validate and test our solutions on real navigation paths of users interacting with dynamic volumetric media in 6-DoF Virtual Reality conditions. Our results show that metrics that consider both user position and viewing direction better perform in detecting user similarity while navigating in a 6-DoF system. Having easy-to-use but robust metrics that underpin multiple tools and answer the question ``how do we detect if two users look at the same content?" open the gate to new solutions for a user-centric system.
Subthreshold phonon generation in an optomechanical system with an exceptional point
Creators: name: Mukhamedyanov, A.
name: Zyablovsky, A. A.
name: Andrianov, E. S.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: A phonon laser based on an optomechanical system consisting of two optical modes interacting with each other via a phononic mode is considered. An external wave exciting one of the optical modes plays a role of the pumping. It is shown that at some amplitude of the external wave an exceptional point exists. When the external wave amplitude is less than one corresponding to the exceptional point, the splitting of the eigenfrequencies takes place. It is demonstrated that in this case, the periodic modulation of the external wave amplitude can result in simultaneous generation of photons and phonons even below the threshold of optomechanical instability.
Improved methodology to measure taxon-specific phosphate uptake in live and unfiltered samples
Creators: name: Talarmin, Agathe
name: Van Wambeke, France
name: Duhamel, Solange
name: Catala, Philippe
name: Moutin, Thierry
name: Lebaron, Philippe
Publisher: name: Columbia University
Year: 2011
Subjects: Biogeochemistry
Marine microbiology
Marine microbiology--Technique
Phosphorus cycle (Biogeochemistry)

description: Microorganisms play a major role in the marine phosphate biogeochemical cycle but the relative contribution of picoplanktonic groups is not well understood. Previous studies have shown that combining uptake measurements of radiolabeled dissolved inorganic phosphate (Pᵢ) substrate with cell sorting by flow cytometry is a powerful tool for the assessment of Pᵢ fluxes at the cell‐specific level. Nevertheless, using ³³P to trace Pᵢ uptake, we show that treatments involving fixation and filtration of the sorted groups (i.e., heterotrophic prokaryotes, Synechococcus and piconanophytoeukaryotes) induce leakage of radioactive Pᵢ (up to 50% of the signal), resulting in a sizeable underestimation of the taxon‐specific Pᵢ uptake. We suggest an alternative protocol, which significantly reduces this bias. Using this optimized protocol, the samples were treated with an excess of nonradioactive Pi to stop the incubation and sorted fractions were directly collected in microtubes for radioactivity counting, avoiding signal loss due to filtration. Sorted groups were strongly and differently impacted by fixation (0.5% PFA), with the exception of Synechococcus cells, which showed once a 10% lower signal in samples treated with the previously used protocols compared with samples treated with ours. Based on the integrity of the live sorted cells, our improved protocol provides reproducible and accurate estimations of the taxon‐specific Pᵢ uptake (≤ 11% variation on cellular uptake rates, sd/average, n = 69). It was successfully applied to P‐depleted oligotrophic seawater samples from the Mediterranean and will allow a comparison of taxon‐specific uptake rates between sites.
Information causality in multipartite scenarios
Creators: name: Pollyceno, Lucas
name: Chaves, Rafael
name: Rabelo, Rafael
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Bell nonlocality is one of the most intriguing and counter-intuitive phenomena displayed by quantum systems. Interestingly, such stronger-than-classical quantum correlations are somehow constrained, and one important question to the foundations of quantum theory is whether there is a physical, operational principle responsible for those constraints. One candidate is the information causality principle, which, in some particular cases, is proven to hold for quantum systems and to be violated by stronger-than-quantum correlations. In multipartite scenarios, though, it is known that the original formulation of the information causality principle fails to detect even extremal stronger-than-quantum correlations, thus suggesting that a genuinely multipartite formulation of the principle is necessary. In this work, we advance towards this goal, reporting a new formulation of the information causality principle in multipartite scenarios. By proposing a change of perspective, we obtain multipartite informational inequalities that work as necessary criteria for the principle to hold. We prove that such inequalities hold for all quantum resources, and forbid some stronger-than-quantum ones. Finally, we show that our approach can be strengthened if multiple copies of the resource are available, or, counter-intuitively, if noisy communication channels are employed.
description: 7+5 pages, 4 figures
Modified Higgs Physics from Composite Light Flavors
Creators: name: Delaunay, Cédric
name: Grojean, Christophe
name: Perez, Gilad
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We point out that Higgs rates into gauge bosons can be significantly modified in composite pseudo Nambu--Goldstone boson (pNGB) Higgs models if quarks belonging to the first two generation are relatively composite objects as well. Although the lightness of the latter a priori screen them from the electroweak symmetry breaking sector, we show, in an effective two-site description, that their partners can lead to order one shifts in radiative Higgs couplings to gluons and photons. Moreover, due to the pseudo-Goldstone nature of the Higgs boson, the size of these corrections is completely controlled by the degree of compositeness of the individual light quarks. The current measurements of flavor-blind Higgs decay rates at the LHC thus provide an indirect probe of the flavor structure of the framework of pNGB Higgs compositeness.
description: 28 pages, 9 figures. v2: typo corrected in eq. 22, references added
title: Κατανεμημένη παρακολούθηση παραβίασης κατωφλίου σε δίκτυα αισθητήρων
Creators: name: Ζωγράφου Ιακωβίνα
Publisher: name: Technical University of Crete
Year: 2012

description: Μη διαθέσιμο
title: Παραγωγή δέσμης αρνητικών ιόντων (H, D) και ουδετεροποίησή της με χρήση τεχνολογίας λέιζερ για εφαρμογές σε αντιδραστήρες Tokamak
Creators: name: Περράκης Κωνσταντίνος Α.
Publisher: name: Technical University of Crete
Year: 2013

description: 1.Πρόλογος -- 2. Εισαγωγή -- 3.Παραγωγή αρνητικών ιόντων -- 4. Μαγνητική μόνωση -- 5. Μαγνητοϋδροδυναμική μελέτη -- 6. Ουδετεροποίηση
Small pigmented eukaryotes play a major role in carbon cycling in the P‐depleted western subtropical North Atlantic, which may be supported by mixotrophy
Creators: name: Duhamel, Solange
name: Kim, Eunsoo
name: Sprung, Ben
name: Anderson, O. Roger
Publisher: name: Columbia University
Year: 2019
Subjects: Biogeochemistry
Chemical oceanography
Carbon cycle (Biogeochemistry)
Eukaryotic cells

description: We found that in the phosphate (PO4)‐depleted western subtropical North Atlantic Ocean, small‐sized pigmented eukaryotes (P‐Euk;
Kai Brodersen (Hrsg.), Metzler Lexikon Antike Stätten am Mittelmeer
Creators: name: Fechner, Detlef
Publisher: name: Forum Classicum
Year: 2017

description: Rezension zu: Kai Brodersen (Hrsg.), Metzler Lexikon Antike Stätten am Mittelmeer, Stuttgart/Weimar (J.B. Metzler) 1999, 888 S., 67 Karten, 380 Abb. (ISBN3-476-01608-0).
description: Forum Classicum, Nr. 4 (1999): Forum Classicum
3D Bosons, 3-Jack polynomials and affine Yangian of ${\mathfrak{gl}}(1)$
Creators: name: Wang, Na
name: Wu, Ke
Publisher: name: arXiv
Year: 2022
Subjects: subject: Combinatorics (math.CO)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: 3D (3 dimensional) Young diagrams are a generalization of 2D Young diagrams. In this paper, We consider 3D Bosons and 3-Jack polynomials. We associate three parameters $h_1,h_2,h_3$ to $y,x,z$-axis respectively. 3-Jack polynomials are polynomials of $P_{n,j}, n\geq j$ with coefficients in $\mathbb C(h_1,h_2,h_3)$, which are the generalization of Schur functions and Jack polynomials to 3D case. Similar to Schur functions, 3-Jack polynomials can also be determined by the vertex operators and the Pieri formulas.
Boldrini, Sandro: Prosodie und Metrik der Römer
Creators: name: Kruschwitz, Peter
Publisher: name: Forum Classicum
Year: 2017

description: Rezension zu: Boldrini, Sandro: Prosodie und Metrik der Römer, Teubner Studienbücher. Stuttgart, Leipzig: Teubner 1999. XII, 183 S. (ISBN 3-519- 07443-5).
description: Forum Classicum, Nr. 4 (1999): Forum Classicum
Sub-0.1 degree phase locking of a single-photon interferometer
Creators: name: Švarc, Vojtěch
name: Nováková, Martina
name: Dudka, Michal
name: Ježek, Miroslav
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We report a single-photon Mach-Zehnder interferometer stabilized to a phase precision of 0.05 degrees over 15 hours. To lock the phase, we employ an auxiliary reference light at a different wavelength than the quantum signal. The developed phase locking operates continuously, with negligible crosstalk, and for an arbitrary phase of the quantum signal. Moreover, its performance is independent of intensity fluctuations of the reference. Since the presented method can be used in a vast majority of quantum interferometric networks it can significantly improve phase-sensitive applications in quantum communication and quantum metrology.
Categoricity of modular and Shimura curves
Creators: name: Daw, Christopher
name: Harris, Adam
Publisher: name: arXiv
Year: 2013
Subjects: subject: Logic (math.LO)
subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: 03C35, 11G18, 03C10, 11G05

description: We describe a model-theoretic setting for the study of Shimura varieties, and study the interaction between model theory and arithmetic geometry in this setting. In particular, we show that the model-theoretic statement of a certain $\mathcal{L}_{ω_1, ω}$-sentence having a unique model of cardinality $\aleph_1$ is equivalent to a condition regarding certain Galois representations associated with Hodge-generic points. We then show that for modular and Shimura curves this $\mathcal{L}_{ω_1, ω}$-sentence has a unique model in every infinite cardinality. In the process, we prove a new characterisation of the special points on any Shimura variety.
Die Schöpferischen Kräfte der Antike. Die Klassischen Sprachen als Mitgestalter der Zukunft. Bericht vom Kongress des Deutschen Altphilologenverbandes zu Marburg vom 28. April bis 2. Mai 2000
Creators: name: Selmaier, Alfred
Publisher: name: Forum Classicum
Year: 2017

description: -
description: Forum Classicum, Nr. 2 (2000): Forum Classicum
title: Ανοδικοί καταλύτες για κυψελίδες καυσίμου χαμηλών / ενδιάμεσων θερμοκρασιών
Creators: name: Μπόλμπου Αλεξάνδρα
Publisher: name: Technical University of Crete
Year: 2013

description: Κεφ. 1: Κυψέλες καυσίμου - Το μέλλον της ηλεκτροπαραγωγής -- Κεφ. 2: Η ετερογενής κατάλυση και ο ρόλος της στις κυψέλες καυσίμου -- Κεφ. 3: Η αντίδραση εκλεκτικής οξείδωσης CO (PROX)
Assessing Relative Volatility/Intermittency/Energy Dissipation
Creators: name: Barndorff-Nielsen, Ole E.
name: Pakkanen, Mikko S.
name: Schmiegel, Jürgen
Publisher: name: arXiv
Year: 2013
Subjects: subject: Statistics Theory (math.ST)
subject: FOS: Mathematics
subject: 62M09 (Primary), 76F55 (Secondary)

description: We introduce the notion of relative volatility/intermittency and demonstrate how relative volatility statistics can be used to estimate consistently the temporal variation of volatility/intermittency when the data of interest are generated by a non-semimartingale, or a Brownian semistationary process in particular. This estimation method is motivated by the assessment of relative energy dissipation in empirical data of turbulence, but it is also applicable in other areas. We develop a probabilistic asymptotic theory for realised relative power variations of Brownian semistationary processes, and introduce inference methods based on the theory. We also discuss how to extend the asymptotic theory to other classes of processes exhibiting stochastic volatility/intermittency. As an empirical application, we study relative energy dissipation in data of atmospheric turbulence.
description: 25 pages, 4 figures, v3: major revision, this version contains an application to electricity prices that was omitted from the published version
Metzger, Gerhard: Lateinische Literaturgeschichte
Creators: name: Nitschke, Jens
Publisher: name: Forum Classicum
Year: 2017

description: Rezension zu: Metzger, Gerhard: Lateinische Literaturgeschichte. 5.Aufl. Freising: Stark 1995. 119 S. (ISBN 3-89449-132-9).
description: Forum Classicum, Nr. 2 (2000): Forum Classicum
Preferential utilization of inorganic polyphosphate over other bioavailable phosphorus sources by the model diatoms Thalassiosira spp.
Creators: name: Diaz, Julia M.
name: Steffen, Rachel
name: Sanders, James G.
name: Tang, Yuanzhi
name: Duhamel, Solange
Publisher: name: Columbia University
Year: 2019
Subjects: Biogeochemistry
Marine microbiology
Diatoms
Thalassiosira
Phosphorus cycle (Biogeochemistry)
Inorganic polyphosphates

description: Polyphosphates and phosphomonoesters are dominant components of marine dissolved organic phosphorus (DOP). Collectively, DOP represents an important nutritional phosphorus (P) source for phytoplankton growth in the ocean, but the contribution of specific DOP sources to microbial community P demand is not fully understood. In a prior study, it was reported that inorganic polyphosphate was not bioavailable to the model diatoms Thalassiosira weissflogii and Thalassiosira pseudonana. However, in this study, we show that the previous finding was a misinterpretation based on a technical artefact of media preparation and that inorganic polyphosphate is actually widely bioavailable to Thalassiosira spp. In fact, orthophosphate, inorganic tripolyphosphate (3polyP), adenosine triphosphate (ATP) and adenosine monophosphate supported equivalent growth rates and final growth yields within each of four strains of Thalassiosira spp. However, enzyme activity assays revealed in all cultures that cell‐associated hydrolysis rates of 3polyP were typically more than ~10‐fold higher than degradation of ATP and the model phosphomonoester compound 4‐methylumbelliferyl phosphate. These results build on prior work, which showed the preferential utilization of polyphosphates in the cell‐free exudates of Thalassiosira spp., and suggest that inorganic polyphosphates may be a key bioavailable source of P for marine phytoplankton.
Exploring Spatial Patterns of Interurban Passenger Flows Using Dual Gravity Models
Creators: name: Wang, Zihan
name: Chen, Yanguang
Publisher: name: arXiv
Year: 2022
Subjects: subject: Physics and Society (physics.soc-ph)
subject: FOS: Physical sciences

description: Passenger flows in a traffic network reflect spatial interaction patterns in an urban systems. Gravity models can be employed to quantitatively describe and predict spatial flows. However, how to model passenger flows and reveal the deep structure of urban and traffic networks in the case of missing partial data is still a problem to be solved. This paper is devoted to characterizing the interurban passenger flows in the Beijing-Tianjin-Hebei region of China by means of dual gravity models and Tencent location big data. The method of parameter estimation is the least squares regression. The main results are as follows. First, both railway and highway passenger flows can be effectively described by the dual gravity model. A small part of missing spatial data can be made up by the predicted values. Second, the fractal properties of traffic flows can be revealed. The railway passenger flows more follow gravity scaling law than the highway passenger flows. Third, the prediction residuals indicate the changing trend of interurban connections in the study area in recent years. The center of gravity of spatial dynamics seems to shift from the Beijing-Tianjin-Tangshan triangle to the Beijing-Baoding-Shijiazhuang axis. A conclusion can be reached that the dual gravity models is an effective tools of for analyzing spatial structures and dynamics of traffic networks and flows. Moreover, the models provide a new approach to estimate fractal dimension of traffic network and spatial flow patterns.
description: 29 pages, 7 figures, 4 tables
Heralded Mapping of Photonic Entanglement into Single Atoms in Free Space: Proposal for a Loophole-Free Bell Test
Creators: name: Sangouard, Nicolas
name: Bancal, Jean-Daniel
name: Muller, Philipp
name: Ghosh, Joyee
name: Eschner, Jurgen
Publisher: name: arXiv
Year: 2013
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: An obvious way to entangle two atoms located at remote locations is to produce a pair of entangled photons half-way between the two atoms, to sent one photon to each location and to subsequently map the photonic entanglement into the atoms. The efficiency of this process is, however, fundamentally limited due to overall transmission losses. We propose a method to herald the success of the mapping operation in free space without destroying nor revealing the stored quantum state. Interestingly for a Bell test, the heralding signal does not open the detection loophole provided the measurement choice is performed once the heralding is obtained only. We show through a detailed feasibility study that this approach could provide an attractive alternative to Bell tests where the atom--atom entanglement is created from atom--photon entanglement using an entanglement swapping operation.
description: 5 pages, 2 figures. v2: Minor changes