cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Low Energy Effective Theory for Axion Strings
Creators: name: Dine, Michael
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We consider aspects of the low energy description of global cosmic strings. In the non-relativistic limit, we study the extent to which these are described by the combination of the Nambu-Gotto and Kalb-Ramond actions. While in a formal sense this is the case for infiniately long strings, for more realistic situations, the collective coordinates of the system do not provide a complete description for more than brief intervals; as time evolves it becomes necessary to include low momentum goldstone excitations as well.
description: 11 pages Reference corrected, comments added to clarify that the focus is on the classical effective field theory; matching to simulations would be of interest but is not the subject here
Embedding of the Georgi-Glashow $SU(5)$ model in the superconformal algebra
Creators: name: Alvarez, Pedro D.
name: Chavez, Rafael A.
name: Zanelli, Jorge
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We present a scheme to construct grand unified models based on the superconformal algebra and the inclusion of matter fields in the adjoint representation of supersymmetry. As an illustration, we implemented the Georgi-Glashow $SU(5)$ model. The model predics the existence of a hidden $(\mathbf{1},\mathbf{24},0) + (\mathbf{5},\mathbf{5}^\ast,-y') + (\mathbf{5}^\ast,\mathbf{5},y')$ sector and an anomalous $U(1)_Z$.
description: 21p, minor corrections
New bacteriophage typing system for Yersinia enterocolitica, Yersinia kristensenii, Yersinia frederiksenii, and Yersinia intermedia: correlation with serotyping, biotyping, and antibiotic susceptibility.
Creators: name: The University of North Carolina at Chapel Hill University Libraries
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 1982

description: Yersinia enterocolitica is listed as a single species in Bergey's Manual of Determinative Bacteriology, but has recently been split into "true" Y. enterocolitica, Y. kristensenii, Y. intermedia, and Y. frederiksenii. From 48 bacteriophages isolated from raw sewage, 24 were chosen as being the most useful for differentiating strains within the four Yersinia species. The composite set of 24 phages typed 92% of 236 Y. enterocolitica strains, 100% of 16 Y. kristensenii strains, 97% of 29 Y. frederiksenii strains, and 90% of 20 Y. intermedia strains. The most common phage type in any of the groups contained 22% of the strains tested, but most of the phage types contained greater than 5% of the strains. The new typing schema was tested in three outbreaks of Y. enterocolitica, and the results agreed well with serotyping and epidemiological findings. In the same outbreaks, biotyping (API 20E profiles; Analytab Products, Plainview, N.Y.) and antibiograms were less reliable markers and probably should be used only in conjunction with serotyping or phage typing or both. Caution should be used in identifying cultures of Y. frederiksenii and Y. intermedia with the API 20E system, since the tests at 37 degrees C for L-rhamnose and melibiose fermentation are often delayed past 24 h, which is the cut-off point for the final reading in the API system. There were distinct differences in the susceptibilities of Y. enterocolitica and Y. kristensenii to ampicillin, carbenicillin, and cephalothin, which adds further support for classifying the latter as a separate species.
Cycle deformation enabled controllable mechanical polarity of bulk metallic glasses
Creators: name: Shang, Bao-Shuang
name: Wang, Wei-Hua
name: Guan, Peng-Fei
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Tuning anisotropy in bulk metallic glasses, ideally isotropic, is of practical interest in optimizing properties and of fundamental interest in understanding the amorphous structure and its instability. By employing the quasi-elastic asymmetric mechanical cycling method, we effectively induce the mechanical polarity of a model bulk metallic glass, without damaging the sample or introducing significant annealing or rejuvenation effects. Moreover, the polarized anelastic limit can be well controlled by regulating the amplitude of mechanical cycling. Through the atomic-level analysis of nonaffine displacement, we find that only plastic atomic rearranged events corresponding to the training direction can be exhausted by asymmetric cycling and the survived anelastic events dominate the directional anelastic limit. The polarized distribution of local yield stress reveals that the mechanical polarity is attributed to the plastic-event-healing induced asymmetry of local potential energy surface, rather than frozen-in anelastic strain. Furthermore, the healing of plastic events associated with the redistribution of local residual stress indicates the origin of polarity induced by asymmetric cycling. Our study is of fundamental importance, which furthers our understanding of the mechanical deformation of metallic glasses and shed some light on the prospects for improved properties through induced anisotropy.
Heavy Operators in Superconformal Chern-Simons Theory
Creators: name: Koch, Robert de Mello
name: Kreyfelt, Rocky
name: Smith, Stephanie
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study the anomalous dimensions for scalar operators in ABJM theory in the SU(2) sector. The operators we consider have a classical dimension that grows as N in the large N limit. Consequently, the large N limit is not captured by summing planar diagrams - non-planar contributions have to be included. We find that the mixing matrix at two-loop order is diagonalized using a double coset ansatz, reducing it to the Hamiltonian of a set of decoupled oscillators. The spectrum of anomalous dimensions, when interpreted in the dual gravity theory, shows that the energy of the fluctuations of the corresponding giant graviton is dependent on the size of the giant. The first subleading corrections to the large N limit are also considered. These subleading corrections to the dilatation operator do not commute with the leading terms, indicating that integrability may not survive beyond the large N limit.
description: 1+16 pages
Wideband timing of the Parkes Pulsar Timing Array UWL data
Creators: name: Curyło, Małgorzata
name: Pennucci, Timothy T.
name: Bailes, Matthew
name: Bhat, N. D. Ramesh
name: Cameron, Andrew D.
name: Dai, Shi
name: Hobbs, George
name: Kapur, Agastya
name: Manchester, Richard N.
name: Mandow, Rami
name: Miles, Matthew T.
name: Russell, Christopher J.
name: Reardon, Daniel J.
name: Shannon, Ryan M.
name: Spiewak, Renée
name: Zic, Andrew
name: Zhu, Xing-Jiang
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: In 2018 an ultra-wide-bandwidth low-frequency (UWL) receiver was installed on the 64-m Parkes Radio Telescope enabling observations with an instantaneous frequency coverage from 704 to 4032 MHz. Here, we present the analysis of a three-year data set of 35 millisecond pulsars observed with the UWL by the Parkes Pulsar Timing Array (PPTA), using wideband timing methods. The two key differences compared to typical narrow-band methods are, firstly, generation of two-dimensional templates accounting for pulse shape evolution with frequency and, secondly, simultaneous measurements of the pulse time-of-arrival (ToA) and dispersion measure (DM). This is the first time that wideband timing has been applied to a uniform data set collected with a single large-fractional bandwidth receiver, for which such techniques were originally developed. As a result of our study, we present a set of profile evolution models and new timing solutions including initial noise analysis. Precision of our ToA and DM measurements is in the range of 0.005 $-$ 2.08 $μ$s and (0.043$-$14.24)$\times10^{-4}$ cm$^{-3}$ pc, respectively, with 94% of the pulsars achieving a median ToA uncertainty of less than 1 $μ$s.
description: 29 pages, 12 figures, Accepted for publication in ApJ
The Panchromatic Hubble Andromeda Treasury X. Ultraviolet to Infrared Photometry of 117 Million Equidistant Stars
Creators: name: Williams, Benjamin F.
name: Lang, Dustin
name: Dalcanton, Julianne J.
name: Dolphin, Andrew E.
name: Weisz, Daniel R.
name: Bell, Eric F.
name: Bianchi, Luciana
name: Byler, Eleanor
name: Gilbert, Karoline M.
name: Girardi, Leo
name: Gordon, Karl
name: Gregersen, Dylan
name: Johnson, L. C.
name: Kalirai, Jason
name: Lauer, Tod R.
name: Monachesi, Antonela
name: Rosenfield, Philip
name: Seth, Anil
name: Skillman, Evan
Publisher: name: arXiv
Year: 2014
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We have measured stellar photometry with the Hubble Space Telescope (HST) Wide Field Camera 3 (WFC3) and Advanced Camera for Surveys (ACS) in near ultraviolet (F275W, F336W), optical (F475W, F814W), and near infrared (F110W, F160W) bands for 117 million resolved stars in M31. As part of the Panchromatic Hubble Andromeda Treasury (PHAT) survey, we measured photometry with simultaneous point spread function fitting across all bands and at all source positions after precise astrometric image alignment (<5-10 milliarcsecond accuracy). In the outer disk, the photometry reaches a completeness-limited depth of F475W~28, while in the crowded, high surface brightness bulge, the photometry reaches F475W~25. We find that simultaneous photometry and optimized measurement parameters significantly increase the detection limit of the lowest resolution filters (WFC3/IR) providing color-magnitude diagrams that are up to 2.5 magnitudes deeper when compared with color-magnitude diagrams from WFC3/IR photometry alone. We present extensive analysis of the data quality including comparisons of luminosity functions and repeat measurements, and we use artificial star tests to quantify photometric completeness, uncertainties and biases. We find that largest sources of systematic error in the photometry are due to spatial variations in the point spread function models and charge transfer efficiency corrections. This stellar catalog is the largest ever produced for equidistant sources, and is publicly available for download by the community.
description: 50 pages, 35 figures, 10 tables, accepted for publication in ApJS
Ionomics
Creators: name: Andermatt, Patrick
name: Christodoulaki, Eirini
name: Doucerain, Cédric
name: Dürrenberger, Franz
name: Flace, Anna
name: Ingles-Prieto, Alvaro
name: Manolova, Vania
name: Polesel, Marcello
name: Steck, Anna-Lena
name: Sundström, Hanna
name: Wildschut, Thijs
name: Wilhelm, Maria
Publisher: name: Zenodo
Year: 2023
Subjects: Protocol

description: Trace elements in their ionic form mediate biochemical reactions in human cells by acting as enzyme cofactors or centers for stabilizing protein structures. Deficit or accumulation of these substances lead to cell toxicity and severe diseases in humans and therefore, intracellular trace ion concentrations (i.e. the "ionome") must be tightly controlled. Inductively coupled plasma mass spectrometry (ICP-MS) was used to determine and quantify the intracellular trace ion concentrations. In ionomics assays HEK cells overexpressing a particular doxycycline-inducible SLC transporter were used to quantify the change of inorganic ions by ICP-MS upon cell lysis. ICP-MS based ionomics is rather a low throughput assay, as a significant volume of sample is required.
Machine Learning of Thermodynamic Observables in the Presence of Mode Collapse
Creators: name: Nicoli, Kim A.
name: Anders, Christopher
name: Funcke, Lena
name: Hartung, Tobias
name: Jansen, Karl
name: Kessel, Pan
name: Nakajima, Shinichi
name: Stornati, Paolo
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: Machine Learning (cs.LG)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: Estimating the free energy, as well as other thermodynamic observables, is a key task in lattice field theories. Recently, it has been pointed out that deep generative models can be used in this context [1]. Crucially, these models allow for the direct estimation of the free energy at a given point in parameter space. This is in contrast to existing methods based on Markov chains which generically require integration through parameter space. In this contribution, we will review this novel machine-learning-based estimation method. We will in detail discuss the issue of mode collapse and outline mitigation techniques which are particularly suited for applications at finite temperature.
description: 10 pages, 2 figures, Proceedings of the 38th International Symposium on Lattice Field Theory, 26th-30th July 2021, Zoom/Gather@Massachusetts Institute of Technology
Topological interpretation for phase transitions of black holes
Creators: name: Fan, Zhong-Ying
Publisher: name: arXiv
Year: 2022
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: In this work, we develop a universal picture from topology in the thermodynamic parameters space to describe first order phase transitions of black holes. By employing an off-shell internal energy, we find two types of topological defects. The first is normal, describing black holes which move with a nonzero velocity and acceleration, in a central force field. The second type of defects are exotic: they are static in the space, not describing black holes but encoding information about first order transitions. For each defect, we assign a winding number and an inertial mass. By studying neutral and charged black holes in asymptotically anti-de Sitter space, we show that first order transitions can be viewed as once or twice interchange of winding numbers between black holes and the exotic defects, through wired action at a distance. This corresponds to the usual notion: a smaller black hole grows into a larger black hole or vice versa. However, our topological analysis illustrates that the transition can also be locally interpreted as virtual collisions between black holes and the exotic defects. In this interpretation, a smaller black hole first grows into a new exotic defect whereas an original exotic defect grows into a larger black hole. All the defects simply change their positions and momentums, rather than interchanging the winding numbers. Critical point of the transition can be extracted when all the defects meet in the parameters space. Certain quantities, such as the Jacobians and the velocities of normal defects show universal behaviors near the critical point.
description: 5pages, 4figures
New virulence-associated plasmid in Yersinia enterocolitica.
Creators: name: The University of North Carolina at Chapel Hill University Libraries
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 1982

description: In a study of 103 strains of Yersinia enterocolitica, 10 strains were found to be lethal for mice and to possess 42- and 82-megadalton plasmids. This association was statistically significant (P much less than 0.001). Serotypes of Y. enterocolitica previously considered avirulent were found to possess these plasmids and to be lethal for mice. A spontaneous derivative of one strain contained only the 82-megadalton plasmid and was lethal for mice anyway. This virulence-associated plasmid is a potential diagnostic tool for the clinical or public health laboratory which must delineate pathogenic strains of Y. enterocolitica.
Wege aus der Kriminalität: Erkenntnisse der Desistance-Forschung und deren Potential für die Praxis der Sozialen Arbeit in der Bewährungshilfe
Creators: name: Merz, Joya
Publisher: name: Hochschule Luzern – Soziale Arbeit
Year: 2024

description: Die vorliegende Literaturarbeit orientiert sich an der Frage, inwiefern die Erkenntnisse der Desistance- Forschung in der risikoorientierten Praxis der Bewährungshilfe genutzt werden können, um straffällige Personen beim Ausstieg aus der Kriminalität zu unterstützen. Die Desistance-Forschung basiert auf der Erkenntnis, dass (fast) allen Straftäter:innen im Lauf ihres Lebens der Ausstieg aus der Kriminalität gelingt. Die Aufarbeitung des aktuellen Forschungsstandes zeigt, dass die Aufrechterhaltung eines straffreien Lebens insbesondere durch eine positive Wechselwirkung zwischen dem Individuum und seiner soziostrukturelle Umwelt geprägt ist. Die Parallelen zwischen der Sozialen Arbeit und der Desistance-Forschung werden schliesslich am Konzept der Lebensweltorientierung und des Lebensbewältigungsansatzes hergeleitet. Demgegenüber wird aufgezeigt, dass die Verschiebung hin zu einer «Hochsicherheitsgesellschaft» mit dem Grundsatz in dubio pro securitate die Gefahr birgt, die Reintegration der Klient:innen als ursprüngliches Ziel der Bewährungshilfe aus den Augen zu verlieren. Studien deuten zudem darauf hin, dass Sozialarbeitende heute verstärkt repressiv ausgerichtete Kontrolleinstellungen verinnerlicht haben. Die vorliegende Bachelorarbeit kommt letztlich zum Ergebnis, dass der konzeptionelle Unterschied zwischen der Risikoorientierung und der Desistance-Forschung hinsichtlich der Frage, wer den Ausstiegsprozess steuert, das grösste Hindernis für die Integration von Desistance-Ansätzen in die Praxis darstellt. Abschliessend werden deshalb Merkmale und Voraussetzungen formuliert, die eine Implementierung begünstigen.
description: + Code Diss LU: hslusa basa be + Fussnote: Bachelor-Arbeit, Hochschule Luzern – Soziale Arbeit, Studienrichtung Sozialarbeit, 2024 + NL-Code: NLLUHSA202409
On the effects of suitably designed space microstructures in the propagation of waves in time modulated composites
Creators: name: Mattei, Ornella
name: Gulizzi, Vincenzo
Publisher: name: arXiv
Year: 2022
Subjects: subject: Classical Physics (physics.class-ph)
subject: Mathematical Physics (math-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: The amplitude of a pulse that propagates in a homogeneous material whose properties are instantaneously changed periodically in time will undergo an exponential increase, due to the interference between the reflected and transmitted pulses generated at each sudden switch. Here we resolve the issue by designing suitable reciprocal PT-symmetric space-time microstructures both in the one-dimensional and two-dimensional case, so that the interference between the scattered waves is such that the overall amplitude of the wave will be constant in time in each constituent material. Remarkably, for the geometries here proposed, a pulse will propagate with constant amplitude regardless of the impedance between the constituent materials, and for some, regardless of the wave speed mismatch. Given that the energy associated with the wave will increase exponentially in time, this creates the possibility to exploit the stable propagation of the pulse to accumulate energy for harvesting.
A three-year study of nosocomial infections associated with Pseudomonas aeruginosa.
Creators: name: The University of North Carolina at Chapel Hill University Libraries
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 1983

description: During a 3-year study period in a university teaching hospital, 417 nosocomial infections associated with Pseudomonas aeruginosa were documented in 321 patients. The overall rate of P. aeruginosa nosocomial infection was 5.3 cases per 1,000 patients. Residence on the surgery or medicine service, advanced patient age, and exposure to the burn, surgery, or medicine intensive care units correlated with higher rates of infection. The most common sites for P. aeruginosa infection were the lower respiratory tract, urinary tract, blood stream, and surgical wounds. Nosocomial P. aeruginosa lower respiratory tract and blood stream infections were significantly associated with exposure to certain intensive care units, whereas P. aeruginosa urinary tract infections more commonly occurred on the neurology and neurosurgery services. Results of live antigen serotyping showed that serotype 6 was most common, followed by serotypes 1 and 11. Serotype 6 correlated with resistance to carbenicillin, gentamicin, and tobramycin, and serotype 11 correlated with resistance to carbenicillin. Two-thirds of the isolates tested were sensitive to carbenicillin, gentamicin, and tobramycin, but 13.2% were resistant to all three of these drugs. P. aeruginosa isolates resistant to all three drugs were associated with urinary tract infections.
Entanglement between two evaporating black holes
Creators: name: Miyata, Akihiro
name: Ugajin, Tomonori
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We study a thermo-field double type entangle state on two disjoint gravitating universes, say A and B, with an eternal black hole on each. As was shown previously, its entanglement entropy of the universe A is computed by the generalized entropy on a new spacetime constructed by suitably gluing the black holes on A and B. We study such spacetime gluings when universes are asymptotically flat and AdS cases, especially when the masses of these black holes are different. We also clarify the rule to construct such a glued spacetime in more general settings from the gravitational path integral view point.
description: 33 pages, 11 figures; v2: typos corrected, references added
Room-temperature photo-chromism of silicon vacancy centers in CVD diamond
Creators: name: Wood, Alexander
name: Lozovoi, Artur
name: Zhang, Zi-Huai
name: Sharma, Sachin
name: López-Morales, Gabriel I.
name: Jayakumar, Harishankar
name: de Leon, Nathalie P.
name: Meriles, Carlos A.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: The silicon-vacancy (SiV) center in diamond is typically found in three stable charge states, SiV0, SiV- and SiV2-, but studying the processes leading to their formation is challenging, especially at room temperature, due to their starkly different photo-luminescence rates. Here, we use confocal fluorescence microscopy to activate and probe charge interconversion between all three charge states under ambient conditions. In particular, we witness the formation of SiV0 via the two-step capture of diffusing, photo-generated holes, a process we expose both through direct SiV0 fluorescence measurements at low temperatures and confocal microscopy observations in the presence of externally applied electric fields. Further, we show that continuous red illumination induces the converse process, first transforming SiV0 into SiV-, then into SiV2-. Our results shed light on the charge dynamics of SiV and promise opportunities for nanoscale sensing and quantum information processing.
Environmental study of a methicillin-resistant Staphylococcus aureus epidemic in a burn unit.
Creators: name: The University of North Carolina at Chapel Hill University Libraries
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 1983

description: During an outbreak of infections caused by methicillin-resistant (MR) Staphylococcus aureus in our burn unit, we conducted an extensive 10-week study to define the environmental epidemiology of the organism. The inanimate environment in patient rooms and adjacent areas was examined by using volumetric air samplers and Rodac plates. Airborne and surface level contamination with MR S. aureus was quantitated, and overall, MR S. aureus comprised 16, 31, and 40% of all bacterial growth from air, elevated surfaces, and floor surfaces, respectively. Mean air, elevated surface, and floor surface MR S. aureus contamination in rooms of MR S. aureus-infected burn patients were 1.9 MR S. aureus per ft3 (ca. 0.028 m3), 20 MR S. aureus per Rodac plate and 48 MR S. aureus per Rodac plate, respectively. Peak patient room environmental contamination levels were 6.9 MR S. aureus per ft3 of air, 70 MR S. aureus per Rodac plate per elevated surface and 138 MR S. aureus per Rodac plate per floor surface. Environmental contamination levels in the adjacent work areas were considerably lower than in infected patient rooms. There was ample opportunity for contamination of personnel through the inanimate environment in this unit.
Die Enzyklika "Summi maeroris" über den Frieden und die Eintracht der Völker (19.7.1950)
Creators: name: Pius XII., Papst
Publisher: name: Herder Korrespondenz
Year: 1970

description: Herder Korrespondenz, Bd. 4 Nr. 12 (1949): Herder Korrespondenz, Band 4, Heft 12
The most massive stars in very young star clusters with a limited mass: Evidence favours significant self-regulation in the star formation processes
Creators: name: Yan, Zhiqiang
name: Jerabkova, Tereza
name: Kroupa, Pavel
Publisher: name: arXiv
Year: 2022
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The stellar initial mass function (IMF) is commonly interpreted to be a scale-invariant probability density distribution function (PDF) such that many small clusters yield the same IMF as one massive cluster of the same combined number of stars. Observations of the galaxy-wide IMF challenge this as dwarf galaxies do not form as many massive stars as expected. This indicates a highly self-regulated star formation process in which stellar masses are not stochastically sampled from the IMF and are instead related to the environment of star formation. Here, the nature of star formation is studied using the relation between the most massive star born in a star cluster and its parental stellar cluster mass (the $m_{\rm max}$--$M_{\rm ecl}$ relation). This relation has been argued to be a statistical effect if stars are sampled randomly from the IMF. By comparing the tightness of the observed $m_{\rm max}$--$M_{\rm ecl}$ distribution with synthetic star clusters with stochastically sampled stellar masses, we find that the expected dispersion of the mock observations is much larger than the observed dispersion. Assuming that $m_{\rm max}$ and $M_{\rm ecl}$ uncertainties from the literature are correct, our test rejects the hypothesis that the IMF is a PDF at a more than $4.5σ$ confidence level. Alternatively, we provide a deterministic stellar mass sampling tool which reproduces the observed $m_{\rm max}$--$M_{\rm ecl}$ distribution and compares well with the luminosities of star-forming molecular clumps. In addition, we find that there is a significant flattening of the $m_{\rm max}$--$M_{\rm ecl}$ relation near $m_{\rm max}=13~M_\odot$. This may suggest strong feedback of stars more massive than about $13~M_\odot$ and/or the ejections of the most massive stars from young clusters in the mass range 63 to $400~M_\odot$ to be likely important physical processes in forming clusters.
description: 16 pages, 10 figures. Accepted for publication in A&A
Rocky Mountain spotted fever vaccine in an animal model.
Creators: name: The University of North Carolina at Chapel Hill University Libraries
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 1983

description: Formalin-killed, purified Rickettsia rickettsii vaccine was evaluated in a guinea pig model of R. rickettsii infection. Vaccinated guinea pigs were partially protected by the vaccine when challenged with virulent, viable rickettsiae. Greater protection was observed when higher doses of vaccine were given and when frequent booster injections were administered. Stimulation of cell-mediated immunity to the vaccine antigens was variable and also appeared to be achieved more reproducibly with booster vaccinations. Serum antibody was elicited by high doses of vaccine and by booster vaccinations. The presence of serum antibody was useful in predicting immunity to challenge with R. rickettsii.
Electronic structure, magnetic properties, spin orientation, and doping effect in Mn$_3$Si$_2$Te$_6$
Creators: name: Zhang, Yang
name: Lin, Ling-Fang
name: Moreo, Adriana
name: Dagotto, Elbio
Publisher: name: arXiv
Year: 2022
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The layered material Mn$_3$Si$_2$Te$_6$, with alternating stacking honeycomb and triangular layers, is attracting considerable attention due to its rich physical properties. Here, using density functional theory and classical Monte Carlo (MC) methods, we systematically study this system. Near the Fermi level, the states are mainly contributed by Te $5p$ orbitals hybridized with Mn $3d$ orbitals, resembling a charge transfer system. Furthermore, the spin orientations of the ferrimagnetic (FiM) ground state display different conductive behaviors when along the $ab$ plane or out-of-plane directions: insulating vs. metallic states. The energy difference between the FiM [110] insulating and FiM [001] metallic phases is very small($ \sim 0.71$ meV/Mn). Changing the angle $θ$ of spin orientation from in-plane to out-of-plane directions, the band gaps of this system are gradually reduced, leading to an insulator-metal transition, resulting in an enhanced electrical conductivity, related to the colossal angular magnetoresistance (MR) effect. In addition, we also constructed the magnetic phase diagram using the classical $XY$ spin model studied with the MC method. Three magnetic phases were obtained including antiferromagnetic order, noncollinear spin patterns, and FiM order. Moreover, we also investigated the Se- and Ge- doping into the Mn$_3$Si$_2$Te$_6$ system: the FiM state has the lowest energy among the magnetic candidates for both Se- or Ge- doped cases. The magnetic anisotropy energy (MAE) decreases in the Se-doped case because the Mn orbital moment is reduced as the doping $x$ increases. Due to the small spin-orbital coupling effect of Se, the insulator-metal transition caused by the spin orientation disappears in the Se-doped case, resulting in an insulating phase in the FiM [001] phase. This causes a reduced colossal angular MR.
description: 12 pages 13 figures
Collaborative evaluation of the Abbott yeast identification system.
Creators: name: The University of North Carolina at Chapel Hill University Libraries
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 1984

description: The Abbott yeast identification system (Abbott Laboratories, Diagnostics Division, Irving, Tex.) is a 24-h, instrumental method for identifying medically important yeasts, based on matrix analysis of 19 biochemical reactions and the germ tube test. The system was evaluated in two clinical laboratories by using 179 coded isolates, which included a high percentage of the less frequently encountered species. Based upon results with these coded isolates and from previously obtained laboratory data, the system software was adjusted and accuracy of the yeast identification system was further evaluated with 378 isolates from clinical sources. Of the 378 clinical yeast isolates tested, 364 (96%) were correctly identified with the Abbott system. Isolates were deliberately selected so that germ tube-positive isolates made up less than 10% of the clinical isolates tested.
Simulations of Triple Microlensing Events I: Detectability of a scaled Sun-Jupiter-Saturn System
Creators: name: Kuang, Renkun
name: Zang, Weicheng
name: Mao, Shude
name: Zhang, Jiyuan
name: Jiang, Haochang
Publisher: name: arXiv
Year: 2022
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Up to date, only 13 firmly established triple microlensing events have been discovered, so the occurrence rates of microlensing two-planet systems and planets in binary systems are still uncertain. With the upcoming space-based microlensing surveys, hundreds of triple microlensing events will be detected. To provide clues for future observations and statistical analyses, we initiate a project to investigate the detectability of triple-lens systems with different configurations and observational setups. As the first step, in this work we develop the simulation software and investigate the detectability of a scaled Sun-Jupiter-Saturn system with the recently proposed telescope for microlensing observation on the ``Earth 2.0 (ET)'' satellite. With the same $Δχ^2$ thresholds of detecting a single planet and two planets, we find that the detectability of the scaled Sun-Jupiter-Saturn analog is about 1% and the presence of the Jovian planet suppresses the detectability of the Saturn-like planet by $\sim $13% regardless of the adopted detection $Δχ^2$ threshold. This suppression probability could be at the same level as the Poisson noise of future space-based statistical samples of triple-lenses, so it is inappropriate to treat each planet separately during detection efficiency calculations.
description: 14 pages, 11 figures, Accepted for publication in MNRAS
Precise radial velocities of giant stars VI. A possible 2:1 resonant planet pair around the K giant star $η$ Cet
Creators: name: Trifonov, Trifon
name: Reffert, Sabine
name: Tan, Xianyu
name: Lee, Man Hoi
name: Quirrenbach, Andreas
Publisher: name: arXiv
Year: 2014
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: We report the discovery of a new planetary system around the K giant $η$ Cet (HIP 5364, HD 6805) based on 118 high-precision optical radial velocities taken at Lick Observatory since July 2000. Since October 2011 an additional nine near-infrared Doppler measurements have been taken using the ESO CRIRES spectrograph (VLT, UT1). The visible data set shows two clear periodicities. Although we cannot completely rule out that the shorter period is due to rotational modulation of stellar features, the infrared data show the same variations as in the optical, which strongly supports that the variations are caused by two planets. Assuming the mass of $η$ Cet to be 1.7 $M_\odot$, the best edge-on coplanar dynamical fit to the data is consistent with two massive planets ($m_b\sin i$ = 2.6 $\pm$ 0.2 $M_{\mathrm{Jup}}$, $m_c\sin i$ = 3.3 $\pm$ 0.2 $M_{\mathrm{Jup}}$), with periods of $P_b$ = 407 $\pm$ 3 days and $P_c$ = 740 $\pm$ 5 days and eccentricities of $e_b$ = 0.12 $\pm$ 0.05 and $e_c$ = 0.08 $\pm$ 0.03. We tested a wide variety of edge-on coplanar and inclined planetary configurations for stability, which agree with the derived radial velocities. We find that in certain coplanar orbital configurations with moderate $e_b$ eccentricity, the planets can be effectively trapped in an anti-aligned 2:1 mean motion resonance. A much larger non-resonant stable region exists in low-eccentricity parameter space, although it appears to be much farther from the best fit than the 2:1 resonant region. In all other cases, the system is categorized as unstable or chaotic. Another conclusion from the coplanar inclined dynamical test is that the planets can be at most a factor of $\sim$ 1.4 more massive than their suggested minimum masses. This stability constraint on the inclination excludes the possibility of two brown dwarfs, and strongly favors a planetary system.
description: 15 pages, 11 figures, accepted for publication in A&A on June 20, 2014
Combined immunoaffinity cDNA-RNA hybridization assay for detection of hepatitis A virus in clinical specimens.
Creators: name: The University of North Carolina at Chapel Hill University Libraries
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 1985

description: To apply cDNA-RNA hybridization methods to the detection of hepatitis A virus (HAV) in clinical materials, we developed a two-step method in which a microtiter-based, solid-phase immunoadsorption procedure incorporating a monoclonal anti-HAV capture antibody was followed by direct blotting of virus eluates to nitrocellulose and hybridization with 32P-labeled recombinant HAV cDNA. This immunoaffinity hybridization method is simple and involves few sample manipulations, yet it retains high sensitivity (10- to 30-fold more than radioimmunoassay) and is capable of detecting approximately 1 X 10(5) to 2 X 10(5) genome copies of virus. The inclusion of the immunoaffinity step removes most contaminating proteins and thus facilitates subsequent immobilization of the virus for hybridization. It also permits positive hybridization signals to be related to specific antigens and adds a level of specificity to the hybridization procedure. When the method was applied to 23 fecal specimens collected from individuals during week 1 of symptoms due to hepatitis A, 13 specimens were found to be reproducibly positive for HAV RNA by immunoaffinity hybridization, whereas only 11 contained viral antigen detectable by radioimmunoassay.
Vacuum Decay Actions from Tunneling Potentials for General Spacetime Dimension
Creators: name: Espinosa, J. R.
name: Fortin, J. -F.
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The tunneling potential method to calculate the action for vacuum decay is an alternative to the Euclidean bounce method that has a number of attractive features. In this paper we extend the formalism to general spacetime dimension $d>2$ and use it to give simple proofs of several results. For Minkowski or Anti de Sitter false vacua, we show that gravity or higher barriers increase vacuum lifetime and describe a very clean picture of gravitational quenching of vacuum decay. We also derive the thin-wall limit of the action, show how detailed balance for dS to dS transitions works in the new formalism and how to obtain potentials for which the vacuum decay solution can be obtained analytically.
description: 17 pages plus appendices
Isolation medium for the recovery of Pseudomonas cepacia from respiratory secretions of patients with cystic fibrosis.
Creators: name: The University of North Carolina at Chapel Hill University Libraries
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 1985

description: A new medium for the isolation of Pseudomonas cepacia from respiratory tract secretions of patients with cystic fibrosis (CF) is described. This medium consists of inorganic salts, 0.5% pyruvate, and 0.1% proteose peptone as nutritive components and 0.0001% crystal violet, 0.15% bile salts, 100 micrograms of ticarcillin per ml, and 300 U of polymyxin B per ml as selective agents. The medium, designated PC medium, supported superior growth of 38 of 50 stock isolates of P. cepacia after 48 h of incubation when compared with MacConkey agar (0 of 50). The medium completely inhibited the growth of 112 of 124 stock isolates of organisms commonly found in respiratory secretions of CF patients. Cultures were made on PC medium with respiratory secretions of 169 CF patients. P. cepacia was recovered from 35 patients with isolates on PC medium but from only 21 patients with isolates on MacConkey agar. Of 221 other potentially pathogenic isolates found in these specimens, only six (two Pseudomonas aeruginosa isolates, two molds, one yeast, and one Serratia marcescens isolate) grew on PC medium. PC medium should facilitate the recovery of P. cepacia from CF patients.
A Comparison of Cosmological Models Using Strong Gravitational Lensing Galaxies
Creators: name: Melia, Fulvio
name: Wei, Jun-Jie
name: Wu, Xue-Feng
Publisher: name: arXiv
Year: 2014
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Strongly gravitationally lensed quasar-galaxy systems allow us to compare competing cosmologies as long as one can be reasonably sure of the mass distribution within the intervening lens. In this paper, we assemble a catalog of 69 such systems, and carry out a one-on-one comparison between the standard model, LCDM, and the R_h=ct Universe. We find that both models account for the lens observations quite well, though the precision of these measurements does not appear to be good enough to favor one model over the other. Part of the reason is the so-called bulge-halo conspiracy that, on average, results in a baryonic velocity dispersion within a fraction of the optical effective radius virtually identical to that expected for the whole luminous-dark matter distribution. Given the limitations of doing precision cosmological testing using the current sample, we also carry out Monte Carlo simulations based on the current lens measurements to estimate how large the source catalog would have to be in order to rule out either model at a ~99.7% confidence level. We find that if the real cosmology is LCDM, a sample of ~200 strong gravitational lenses would be sufficient to rule out R_h=ct at this level of accuracy, while ~300 strong gravitational lenses would be required to rule out LCDM if the real Universe were instead R_h=ct. The difference in required sample size reflects the greater number of free parameters available to fit the data with LCDM. We point out that, should the R_h=ct Universe eventually emerge as the correct cosmology, its lack of any free parameters for this kind of work will provide a remarkably powerful probe of the mass structure in lensing galaxies, and a means of better understanding the origin of the bulge-halo conspiracy.
description: 34 Pages, 6 Figures and 5 Tables. Accepted for publication in the Astronomical Journal. arXiv admin note: text overlap with arXiv:1405.2388
Inteligencia artificial aplicada al mundo de las bibliotecas de la salud
Creators: name: Robinson-Garcia, Nicolas
Publisher: name: Zenodo
Year: 2023

description: Slides from my participation in the Discussion Panel 'Inteligencia artificial aplicada al mundo de las bibliotecas de la salud' held at BiblioSalud2023 in Valladolid on the 19th of October, 2023.
Exotic (1/rn) binary gravitational lenses
Creators: name: Melchiorre, Chiara
Publisher: name: Universita degli studi di Salerno
Year: 2016
Subjects: subject: FIS/02 FISICA TEORICA, MODELLI E METODI MATEMATICI
subject: Gravitational lensing
subject: Quantum theory

description: 2014 - 2015
description: A variety of observations suggests that the present universe is dominated by some unknown components. The distribution and properties of these components are the focus of modern cosmology and we are only beginning to understand them. Gravitational lensing, the bending of light in the gravita- tional eld of a massive object, is one of the predictions of the general theory of relativity. Especially with recent and coming advances in observational data, the gravitational lensing is regarded as one of the most e ective tools for probing a number of interesting phenomena of the universe. Some of these phenomena are the existence of various astrophysical objects like black holes, super-dense neutron stars, exotic matter, wormholes, naked singular- ities etc. The detection of these objects may eventually shed light on the possible connection between the quantum theory and gravity. Inspired by the latest result in the Sloan Digital Sky Survey Quasar Lens Search (SQLS) there are a lot of theoretical works concerning exotic objects. With some violation of the energy conditions, it is possible to combine scalar elds or other types of matter so as to build metrics that fall as 1=rn asymptoti- cally. This thesis aims at exploiting the existing gravitational lensing theory for non-Schwarzschild metrics to study a lensing system composed of two objects whose gravitational potential asymptotically falls as 1=rn, whether ordinary (n < 1) or exotic (n > 1). [edited by author]
UHECR arrival directions in the latest data from the original Auger and TA surface detectors and nearby galaxies
Creators: name: di Matteo, Armando
name: Anchordoqui, Luis
name: Bister, Teresa
name: Biteau, Jonathan
name: Caccianiga, Lorenzo
name: de Almeida, Rogério
name: Deligny, Olivier
name: Giaccari, Ugo
name: Harari, Diego
name: Kim, Jihyun
name: Kuznetsov, Mikhail
name: Mariş, Ioana
name: Rubtsov, Grigory
name: Tinyakov, Peter
name: Troitsky, Sergey
name: Urban, Federico
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: The distribution of ultra-high-energy cosmic-ray arrival directions appears to be nearly isotropic except for a dipole moment of order $6 \times (E/10~\mathrm{EeV})$ per cent. Nonetheless, at the highest energies, as the number of possible candidate sources within the propagation horizon and the magnetic deflections both shrink, smaller-scale anisotropies might be expected to emerge. On the other hand, the flux suppression reduces the statistics available for searching for such anisotropies. In this work, we consider two different lists of candidate sources: a sample of nearby starburst galaxies and the 2MRS catalog tracing stellar mass within $250~\mathrm{Mpc}$. We combine surface-detector data collected at the Pierre Auger Observatory until 2020 and the Telescope Array until 2019, and use them to test models in which UHECRs comprise an isotropic background and a foreground originating from the candidate sources and randomly deflected by magnetic fields. The free parameters of these models are the energy threshold, the signal fraction, and the search angular scale. We find a correlation between the arrival directions of $11.8\%_{-3.1\%}^{+5.0\%}$ of cosmic rays detected with $E \ge 38~\mathrm{EeV}$ by Auger or with $E \gtrsim 49~\mathrm{EeV}$ by TA and the position of nearby starburst galaxies on a ${15.5^\circ}_{-3.2^\circ}^{+5.3^\circ}$ angular scale, with a $4.2σ$ post-trial significance, as well as a weaker correlation with the overall galaxy distribution.
description: proceedings of the 37th International Cosmic Ray Conference (ICRC 2021), 12-23 July 2021, Berlin, Germany
Gluon radiation by heavy quarks at intermediate energies and consequences for the mass hierarchy of energy loss
Creators: name: Gossiaux, Pol Bernard
name: Aichelin, Joerg
name: Gousset, Thierry
name: Nahrgang, Marlene
name: Ozvenchuk, Vitalii
name: Werner, Klaus
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We extend the Gunion Bertsch calculation of gluon radiation in single scattering to the case of finite mass quarks. This case applies to the radiative energy-loss of heavy quarks of intermediate energies propagating in a quark gluon plasma. We discuss more specifically the dead cone effect as well as the mass hierarchy of the collisional and radiative energy loss and provide some predictions for observables sensitive to the mass hierarchy of energy loss in ultrarelativistic heavy ion collisions.
description: Proceedings of the 24th Quark Matter conference, 19-24 May 2014, Darmstadt, Germany. 4 pp