cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Frequency shifts in NIST Cs Primary Frequency Standards due To Transverse RF Field Gradients
Creators: name: Ashby, Neil
name: Barlow, Stephan
name: Heavner, Thomas
name: Jefferts, Steven
Publisher: name: arXiv
Year: 2014
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: A single-particle Green's function (propagator) is introduced to study the detection of laser-cooled Cesium atoms in an atomic fountain due to RF field gradients in the Ramsey TE011 cavity. The detection results in a state-dependent loss of atoms at apertures in the physics package, resulting in a frequency bias. A model accounting only for motion in one dimension transverse to the symmetry axis of the fountain is discussed in detail and then generalized to two transverse dimensions. Results for fractional frequency shifts due to transverse field gradients are computed for NIST F-1 and F-2 Cesium fountains. The shifts are found to be negligible except in cases of higher RF power applied to the cavities.
description: 14 pages, 10 figures, 1 table
On the Power Counting in Effective Field Theories
Creators: name: Buchalla, Gerhard
name: Cata, Oscar
name: Krause, Claudius
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We discuss the systematics of power counting in general effective field theories, focussing on those that are nonrenormalizable at leading order. As an illuminating example we consider chiral perturbation theory gauged under the electromagnetic $U(1)$ symmetry. This theory describes the low-energy interactions of the octet of pseudo-Goldstone bosons in QCD with photons and has been discussed extensively in the literature. Peculiarities of the standard approach are pointed out and it is shown how these are resolved within our scheme. The presentation follows closely our recent discussion of power counting for the electroweak chiral Lagrangian. The systematics of the latter is reviewed and shown to be consistent with the concept of chiral dimensions. The results imply that naive dimensional analysis (NDA) is incomplete in general effective field theories, while still reproducing the correct counting in special cases.
description: 14 pages, no figures
Karhunen-Loève Data Imputation in High Contrast Imaging
Creators: name: Ren, Bin B.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Machine Learning (stat.ML)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: Detection and characterization of extended structures is a crucial goal in high contrast imaging. However, these structures face challenges in data reduction, leading to over-subtraction from speckles and self-subtraction with most existing methods. Iterative post-processing methods offer promising results, but their integration into existing pipelines is hindered by selective algorithms, high computational cost, and algorithmic regularization. To address this for reference differential imaging (RDI), here we propose the data imputation concept to Karhunen-Loève transform (DIKL) by modifying two steps in the standard Karhunen-Loève image projection (KLIP) method. Specifically, we partition an image to two matrices: an anchor matrix which focuses only on the speckles to obtain the DIKL coefficients, and a boat matrix which focuses on the regions of astrophysical interest for speckle removal using DIKL components. As an analytical approach, DIKL achieves high-quality results with significantly reduced computational cost (~3 orders of magnitude less than iterative methods). Being a derivative method of KLIP, DIKL is seamlessly integrable into high contrast imaging pipelines for RDI observations.
description: 7 pages, 5 figures, A&A accepted
Statistical aspects of health monitoring of laboratory animal colonies
Creators: name: Hansen, Axel Kornerup
Publisher: name: Scandinavian Journal of Laboratory Animal Sciences
Year: 2019

description: Sample size, sampling frequency and the importance of random sampling in health monitoring of colonies of laboratory animals are discussed and the terms nosographic sensitivity (N1), nosographic specificity (N2), diagnostic sensitivity {D1}, and diagnostic specificity (D2) are explained. It is concluded that test systems with a diagnostic specificity above 0.95 should be chosen, while a low nosographic sensitivity can be accepted, if the sample size (S) is calculated from the formula in which p is the prevalence.
description: Scandinavian Journal of Laboratory Animal Sciences, Vol. 20 No. 1 (1993)
Post-COVID-19 syndrome risk factors and further use of health services in East England.
Creators: name: Debski, Maciej
name: Tsampasian, Vasiliki
name: Haney, Shawn
name: Blakely, Katy
name: Weston, Samantha
name: Ntatsaki, Eleana
name: Lim, Mark
name: Madden, Susan
name: Perperoglou, Aris
name: Vassiliou, Vassilios S
Publisher: name: Apollo - University of Cambridge Repository
Year: 2022
Subjects: Emerging Infectious Diseases
Prevention
Clinical Research
Health Services
3 Good Health and Well Being

description: Post-COVID syndrome, defined as symptoms persisting for more than twelve weeks after the diagnosis of COVID-19, has been recognised as a new clinical entity in the context of SARS-CoV-2 infection. This study was conducted to characterise the burden and predictors for post-COVID-19 syndrome in the local population. It was a community-based web-survey study conducted in Norfolk, East England, UK. We sent the survey to patients with confirmed COVID-19 infection by real-time polymerase chain reaction by December 6th, 2020. Questions related to the pre-COVID and post-COVID level of symptoms and further healthcare use. Baseline characteristics were collected from the primary care records. Logistic regression analysis was conducted to establish predictors for post-COVID-19 syndrome and further healthcare utilisation. Of 6,318 patients, survey responses were obtained from 1,487 participants (23.5%). Post-COVID-19 syndrome symptoms were experienced by 774 (52.1%) respondents. Male sex compared to female sex was a factor protective of post-COVID symptoms; relative risk (RR) 0.748, 95% confidence interval (CI), 0.605-0.924. Body mass index was associated with a greater risk of developing post-COVID-19 symptoms (RR 1.031, 95% CI, 1.016-1.047, for 1 kg/m2). A total of 378 (25.4%) people used further health services after their index COVID-19 infection, of whom 277 (73.2%) had post-COVID symptoms. Male sex was negatively associated with the use of further health services (RR 0.618, 95% CI, 0.464-0.818) whereas BMI was positively associated (RR 1.027, 95% CI, 1.009-1.046). Overall, post-COVID-19 symptoms increased the probability of using health services with RR 3.280, 95% CI, 2.540-4.262. This survey of a large number of people previously diagnosed with COVID-19 across East England shows a high prevalence of self-reported post-COVID-19 syndrome. Female sex and BMI were associated with an increased risk of post-COVID-19 syndrome and further utilisation of healthcare.
Cosmological perturbations and structure formation in nonlocal infrared modifications of general relativity
Creators: name: Dirian, Yves
name: Foffa, Stefano
name: Khosravi, Nima
name: Kunz, Martin
name: Maggiore, Michele
Publisher: name: arXiv
Year: 2014
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study the cosmological consequences of a recently proposed nonlocal modification of general relativity, obtained by adding a term $m^2R\,\Box^{-2}R$ to the Einstein-Hilbert action. The model has the same number of parameters as $Λ$CDM, with $m$ replacing $Ω_Λ$, and is very predictive. At the background level, after fixing $m$ so as to reproduce the observed value of $Ω_M$, we get a pure prediction for the equation of state of dark energy as a function of redshift, $w_{\rm DE}(z)$, with $w_{\rm DE}(0)$ in the range $[-1.165,-1.135]$ as $Ω_M$ varies over the broad range $Ω_M\in [0.20,0.36]$. We find that the cosmological perturbations are well-behaved, and the model fully fixes the dark energy perturbations as a function of redshift $z$ and wavenumber $k$. The nonlocal model provides a good fit to supernova data and predicts deviations from General Relativity in structure formation and in weak lensing at the level of 3-4%, therefore consistent with existing data but readily detectable by future surveys. For the logarithmic growth factor we obtain $γ\simeq 0.53$, to be compared with $γ\simeq 0.55$ in $Λ$CDM. For the Newtonian potential on subhorizon scales our results are well fitted by $Ψ(a;k)=[1+μ_s a^s]Ψ_{\rm GR}(a;k)$ with a scale-independent $μ_s\simeq 0.09$ and $s\simeq 2$, while the anisotropic stress is negligibly small.
description: 39 pages, 20 figures
Academic Advisor Project Data.csv
Creators: name: Bang, Eun-Jun
name: Shamow, Allen
Publisher: name: figshare
Year: 2023
Subjects: Higher education

description: Our data was collected to identify the protective and risk factors associated with burnout among academic advisors throughout colleges and universities in northeastern Oklahoma. Through the identification of these protective and risk factors, this study aims to provide information salient to increasing retention rates among both students and advisors.
Dinámica poblacional y uso de hábitat de las aves playeras en la ensenada de La Paz, como componente del corredor migratorio del Pacífico /
Creators: name: Carmona Piña, Leandro Roberto
Publisher: name: Universidad Autónoma de Baja California.
Year: 2022
Subjects: subject: Aves||Dinámica poblacional||Aves Baja California Sur La Paz||Oceanografía costera||Tesis
subject: QL686 C37 2007

description: Para determinar y evaluar la dinámica poblacional y uso del hábitat de las aves playeras en la ensenada de La Paz entre 1996 y 2003 se llevaron a cabo censos, observaciones focales, captura con redes de niebla y reobservación de aves marcadas.
Detection of the Keplerian decline in the Milky Way rotation curve
Creators: name: Jiao, Yongjun
name: Hammer, Francois
name: Wang, Haifeng
name: Wang, Jianling
name: Amram, Philippe
name: Chemin, Laurent
name: Yang, Yanbin
Publisher: name: arXiv
Year: 2023
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Our position inside the Galactic disc had prevented us from establishing an accurate rotation curve, until the advent of Gaia, whose third data release (Gaia DR3) made it possible to specify it up to twice the optical radius. We aim to establish a new rotation curve of the Galaxy from the Gaia DR3, by drastically reducing uncertainties and systematics, and with the goal to provide a new estimate of the mass of the Galaxy. We have compared different estimates, established a robust assessment of the systematic uncertainties, and addressed differences in methodologies, particularly regarding distance estimates. This results in a sharply decreasing rotation curve for the Milky Way, the decrease in velocity between 19.5 and 26.5 kpc is approximately 30 km s$^{-1}$. We have identified, for the first time, a Keplerian decline of the rotation curve, starting at $\sim$ 19 kpc and up to $\sim$ 26.5 kpc from the Galaxy center, while a flat rotation curve is rejected with a significance of 3$σ$. The total mass is revised downwards to $2.06^{+0.24}_{-0.13}\times 10^{11}\ M_{\odot}$, in agreement with an absence of significant mass increase at radii larger than 19 kpc. The upper limit of the total mass was evaluated by considering the upper values of velocity measurements, which leads to a strict, unsurpassable, limit of $5.4\times 10^{11}\ M_{\odot}$.
description: 13 Pages, 13 Figures, version compliant to that of Astronomy and Astrophysics journal
Compressed Sensing Based Direct Conversion Receiver With Interference Reducing Sampling
Creators: name: Pierzchlewski, Jacek
name: Arildsen, Thomas
name: Larsen, Torben
Publisher: name: arXiv
Year: 2014
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: This paper describes a direct conversion receiver applying compressed sensing with the objective to relax the analog filtering requirements seen in the traditional architecture. The analog filter is cumbersome in an \gls{IC} design and relaxing its requirements is an advantage in terms of die area, performance and robustness of the receiver. The objective is met by a selection of sampling pattern matched to the prior knowledge of the frequency placement of the desired and interfering signals. A simple numerical example demonstrates the principle. The work is part of an ongoing research effort and the different project phases are explained.
description: 3 pages, 5 figures, submitted to IEEE International Conference On Sensing Communication and Networking 2014 (poster)
Enriching inner discs and giant planets with heavy elements
Creators: name: Bitsch, Bertram
name: Mah, Jingyi
Publisher: name: arXiv
Year: 2023
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Giant exoplanets seem to have on average a much larger heavy element content than the solar system giants. Past attempts to explain these heavy element contents include collisions between planets, accretion of volatile rich gas and accretion of gas enriched in micro-metre sized solids. However, these different theories individually could not explain the heavy element content of giants and the volatile to refractory ratios in atmospheres of giant planets at the same time. Here we combine the approaches of gas accretion enhanced with vapor and small micro-meter sized dust grains. As pebbles drift inwards, the volatile component evaporates and enriches the disc, while the smaller silicate core of the pebble continues to move inwards. The smaller silicate pebbles drift slower, leading to a pile-up of material interior to the water ice line, increasing the dust-to-gas ratio interior to the ice line. Under the assumption that these small dust grains follow the motion of the gas, gas accreting giants accrete large fractions of small solids in addition to the volatile vapor. The effectiveness of the solid enrichment requires a large disc radius to maintain the pebble flux for a long time and a large viscosity that reduces the size and inward drift of the small dust grains. However, this process depends crucially on the debated size difference of the pebbles interior and exterior of the water ice line. On the other hand, the volatile component released by the inward drifting pebbles can lead to a large enrichment with heavy element vapor, independently of a size difference of pebbles interior and exterior to the water ice line. Our model stresses the importance of the disc's radius and viscosity on the enrichment of dust and vapor. Consequently we show how our model could explain the heavy element content of the majority of giant planets by using combined estimates of dust and vapor enrichment.
description: Accepted by A&A, 10 pages, 9 figures, now with language corrections
Evolution of Chemistry in the envelope of Hot Corinos (ECHOS). I. Extremely young sulphur chemistry in the isolated Class 0 object B335
Creators: name: Esplugues, G.
name: Rodríguez-Baras, M.
name: Andrés, D. San
name: Navarro-Almaida, D.
name: Fuente, A.
name: Rivière-Marichalar, P.
name: Sánchez-Monge, Á.
name: Drozdovskaya, M. N.
name: Spezzano, S.
name: Caselli, P.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Within the project Evolution of Chemistry in the envelope of HOt corinoS (ECHOS), we present a study of sulphur chemistry in the envelope of the Class 0 source B335 through observations in the spectral range 7, 3, and 2 mm. We have modelled observations assuming LTE and LVG approximation. We have also used the code Nautilus to study the time evolution of sulphur species. We have detected 20 sulphur species with a total gas-phase S abundance similar to that found in the envelopes of other Class 0 objects, but with significant differences in the abundances between sulphur carbon chains and sulphur molecules containing oxygen and nitrogen. Our results highlight the nature of B335 as a source especially rich in sulphur carbon chains unlike other Class 0 sources. The low presence or absence of some molecules, such as SO and SO+, suggests a chemistry not particularly influenced by shocks. We, however, detect a large presence of HCS+ that, together with the low rotational temperatures obtained for all the S species (<15 K), reveals the moderate or low density of the envelope of B335. We also find that observations are better reproduced by models with a sulphur depletion factor of 10 with respect to the sulphur cosmic elemental abundance. The comparison between our model and observational results for B335 reveals an age of 10$^4$$<$t$<$10$^5$ yr, which highlights the particularly early evolutionary stage of this source. B335 presents a different chemistry compared to other young protostars that have formed in dense molecular clouds, which could be the result of accretion of surrounding material from the diffuse cloud onto the protostellar envelope of B335. In addition, the analysis of the SO2/C2S, SO/CS, and HCS+/CS ratios within a sample of prestellar cores and Class 0 objects show that they could be used as good chemical evolutionary indicators of the prestellar to protostellar transition.
Visualizing Skin Effects in Conductors with MRI: ${}^7$Li MRI Experiments and Calculations
Creators: name: Ilott, Andrew J.
name: Chandrashekar, S.
name: Klöckner, Andreas
name: Chang, Hee Jung
name: Trease, Nicole M.
name: Grey, Clare P.
name: Greengard, Leslie
name: Jerschow, Alexej
Publisher: name: arXiv
Year: 2014
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Numerical Analysis (math.NA)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: While experiments on metals have been performed since the early days of NMR (and DNP), the use of bulk metal is normally avoided. Instead, often powders have been used in combination with low fields, so that skin depth effects could be neglected. Another complicating factor of acquiring NMR spectra or MRI images of bulk metal is the strong signal dependence on the orientation between the sample and the radio frequency (RF) coil, leading to non-intuitive image distortions and inaccurate quantification. Such factors are particularly important for NMR and MRI of batteries and other electrochemical devices. Here, we show results from a systematic study combining RF field calculations with experimental MRI of $^7$Li metal to visualize skin depth effects directly and to analyze the RF field orientation effect on MRI of bulk metal. It is shown that a certain degree of selectivity can be achieved for particular faces of the metal, simply based on the orientation of the sample. By combining RF field calculations with bulk magnetic susceptibility calculations accurate NMR spectra can be obtained from first principles. Such analyses will become valuable in many applications involving battery systems, but also metals, in general.
Doses for Laboratory Animals based on Metabolic Rate
Creators: name: Hau, J.
name: Poulsen, O. M.
Publisher: name: Scandinavian Journal of Laboratory Animal Sciences
Year: 2019

description: The differences in metabolic rates (M) of different mammals often make it difficult to estimate the dose of e.g. anaesthetics from one species to another. It is well known that the mammalian metabolic rate is correlated to the body weight (W), and the relationship between body weight and metabolic rate kan be expressed using the equation: (1) M = 3.8 x W-25 Using the assumption, that the dose of e.g. an anaesthetic only depends on the metabolic rate of the animal, a simple mathematic equation can be used in scaling the dose from one species to another: As an example the equation is employed for the calculation of the doses of pentobarbital for a series of different mammals of different size. The calculated doses agree well with the doses reported in the literature. The equation may be of generel usefulness for a quick calculation of a suitable dose level, when the dose level of another species is known.
description: Scandinavian Journal of Laboratory Animal Sciences, Vol. 15 No. 2 (1988)
Decoding the IRX-β dust attenuation relation in star-forming galaxies at intermediate redshift
Creators: name: Hamed, M.
name: Pistis, F.
name: Figueira, M.
name: Małek, K.
name: Nanni, A.
name: Buat, V.
name: Pollo, A.
name: Vergani, D.
name: Bolzonella, M.
name: Junais
name: Krywult, J.
name: Takeuchi, T.
name: Riccio, G.
name: Moutard, T.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We aim to understand what drives the IRX-βdust attenuation relation at intermediate redshift (0.5 < z < 0.8) in star-forming galaxies. We investigate the role of various galaxy properties in shaping this observed relation. We use robust [O ii] λ3727, [O iii] λλ4959, 5007, and Hβline detections of our statistical sample of 1049 galaxies to estimate the gas-phase metallicities. We derive key physical properties that are necessary to study galaxy evolution, such as the stellar masses and the star formation rates, using the spectral energy distribution fitting tool CIGALE. Equivalently, we study the effect of galaxy morphology (mainly the Sérsic index n and galaxy inclination) on the observed IRX-βscatter. We also investigate the role of the environment in shaping dust attenuation in our sample. We find a strong correlation of the IRX-βrelation on gas-phase metallicity in our sample, and also strong correlation with galaxy compactness characterized by the Sérsic indexes. Correlations are also seen with stellar masses, specific star formation rates and the stellar ages of our sources. Metallicity strongly correlates with the IRX-βscatter, this also results from the older stars and higher masses at higher beta values. Galaxies with higher metallicities show higher IRX and higher beta values. The correlation with specific dust mass strongly shifts the galaxies away from the IRX-βrelation towards lower \b{eta} values. We find that more compact galaxies witness a larger amount of attenuation than less compact galaxies. There is a subtle variation in the dust attenuation scatter between edge-on and face-on galaxies, but the difference is not statistically significant. Galaxy environments do not significantly affect dust attenuation in our sample of star-forming galaxies at intermediate redshift.
description: 14 pages, 13 figures, accepted for publication in A&A
Estatus actual de una especie en peligro de extinción, la vaquita (Phocoena sinus) : una aproximación poblacional con métodos acústicos y bayesianos /
Creators: name: Jaramillo Legorreta, Armando Martín
Publisher: name: Universidad Autónoma de Baja California.
Year: 2022
Subjects: subject: Vaquita marina||Odontocetos California, Golfo de||Phocoenidae||Vaquita marina Ecología poblacional||Oceanografía costera||Tesis
subject: QL737.C434 J37 2008

description: La vaquita (Phocoena sinus) es la especie de pequeño cetáceo en mayor peligro de extinción alrededor del mundo, y su hábitat se restringe a una porción del Alto Golfo de California.
PulsarX: a new pulsar searching package -I. A high performance folding program for pulsar surveys
Creators: name: Men, Yunpeng
name: Barr, Ewan
name: Clark, C. J.
name: Carli, Emma
name: Desvignes, Gregory
Publisher: name: arXiv
Year: 2023
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Pulsar surveys with modern radio telescopes are becoming increasingly computationally demanding. This is particularly true for wide field-of-view pulsar surveys with radio interferometers, and those conducted in real or quasi-real time. These demands result in data analysis bottlenecks that can limit the parameter space covered by the surveys and diminish their scientific return. In this paper, we address the computational challenge of `candidate folding' in pulsar searching, presenting a novel, efficient approach designed to optimise the simultaneous folding of large numbers of pulsar candidates. We provide a complete folding pipeline appropriate for large-scale pulsar surveys including radio frequency interference (RFI) mitigation, dedispersion, folding and parameter optimization. By leveraging the Fast Discrete Dispersion Measure Transform (FDMT) algorithm proposed by Zackay et al. (2017), we have developed an optimized, and cache-friendly implementation that we term the pruned FDMT (pFDMT). The pFDMT approach efficiently reuses intermediate processing results and prunes the unused computation paths, resulting in a significant reduction in arithmetic operations. In addition, we propose a novel folding algorithm based on the Tikhonov-regularised least squares method (TLSM) that can improve the time resolution of the pulsar profile. We present the performance of its real-world application as an integral part of two major pulsar search projects conducted with the MeerKAT telescope: the MPIfR-MeerKAT Galactic Plane Survey (MMGPS) and the Transients and Pulsars with MeerKAT (TRAPUM) project. In our processing, for approximately 500 candidates, the theoretical number of dedispersion operations can be reduced by a factor of around 50 when compared to brute-force dedispersion, which scales with the number of candidates.
description: Accepted for publication in A&A
Hepatic p-nitrophenetole O-deethylation Activity in Mice depends on Diet Composition
Creators: name: Nielsen, Jesper Bo
name: Andesen, Ole
name: Svendsen, Per
Publisher: name: Scandinavian Journal of Laboratory Animal Sciences
Year: 2019

description: The present study investigated effects of various commercial diets, of protein and of fat 1evels in semisynthetic diets, and of fiber content and type on hepatic O-deethylation of p-nitrophenetole in mice. A high fat content increased and a high fiber content decreased the hepatic p-nitrophenetole O-deethylation activity. The activity in mice kept on different commercial feedings differed significantly. The level of hepatic microsomal cytochrome P-450 activity affects the toxicity of many compounds. Thus, standardization of commercial feeds for experimental animals used in toxicological and pharmacological studies is needed to avoid the potential risk of misleading conclusions.
description: Scandinavian Journal of Laboratory Animal Sciences, Vol. 15 No. 2 (1988)
Health monitoring of purpose bred laboratory rabbits in Sweden: Major findings
Creators: name: Feinstein, R. E.
name: Rehbinder, C.
Publisher: name: Scandinavian Journal of Laboratory Animal Sciences
Year: 2019

description: Post-mortem examinations were performed on groups of 12 rabbits from nine colonies. The most frequent pathological changes found were chronic inﬂammatory processes in lungs and intestines. Bordetella bronchiseptica was frequently isolated and Pasteurella spp. were not observed. Most cases of enteritis were associated with Eimeria spp., but Trichomonas spp. and Coronaviruses were also noticed. The pinworm Passalums ambiguus was found in seven groups and the nematode Trichostrongylus retortaeformis in one. Rabbits from five colonies evidenced hepatic coccidiosis. Among ectoparasites, Cheyletiellaparasitivorax was found in seven groups and Listrophorus gibbus in four. The ear mite Psoroptes cuniculii was recorded in two groups. One rabbit exhibited Encephalitozoon cum'culi antibodies and another one Toxoplasma gondii antibodies. Among other findings, the ascending aorta and are displayed calcified plaques in eight rabbits from three colonies and the appendiceal lymphoid tissues evidenced multinucleated giant cells in adult rabbits of three groups. A good correlation was found between the health of the rabbits and the hygienic standards at the colonies.
description: Scandinavian Journal of Laboratory Animal Sciences, Vol. 15 No. 2 (1988)
Weyl operators, Tomita-Takesaki theory, and Bell-Clauser-Horne-Shimony-Holt inequality violations
Creators: name: De Fabritiis, P.
name: Guedes, F. M.
name: Guimaraes, M. S.
name: Peruzzo, G.
name: Roditi, I.
name: Sorella, S. P.
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The violation of the Bell-CHSH inequality in the vacuum state of a relativistic free real scalar field is established by means of the Tomita-Takesaki construction and of the direct computation of the correlation functions of Weyl operators.
description: 10 pages, 2 figures, revised version. Accepted for publication in PRD
HCN emission from translucent gas and UV-illuminated cloud edges revealed by wide-field IRAM 30m maps of Orion B GMC: Revisiting its role as tracer of the dense gas reservoir for star formation
Creators: name: Santa-Maria, M. G.
name: Goicoechea, J. R.
name: Pety, J.
name: Gerin, M.
name: Orkisz, J. H.
name: Petit, F. Le
name: Einig, L.
name: Palud, P.
name: Magalhaes, V. de Souza
name: Bešlić, I.
name: Segal, L.
name: Bardeau, S.
name: Bron, E.
name: Chainais, P.
name: Chanussot, J.
name: Gratier, P.
name: Guzmán, V. V.
name: Hughes, A.
name: Languignon, D.
name: Levrier, F.
name: Lis, D. C.
name: Liszt, H. S.
name: Bourlot, J. Le
name: Oya, Y.
name: Öberg, K.
name: Peretto, N.
name: Roueff, E.
name: Roueff, A.
name: Sievers, A.
name: Thouvenin, P. -A.
name: Yamamoto, S.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present 5 deg^2 (~250 pc^2) HCN, HNC, HCO+, and CO J=1-0 maps of the Orion B GMC, complemented with existing wide-field [CI] 492 GHz maps, as well as new pointed observations of rotationally excited HCN, HNC, H13CN, and HN13C lines. We detect anomalous HCN J=1-0 hyperfine structure line emission almost everywhere in the cloud. About 70% of the total HCN J=1-0 luminosity arises from gas at A_V < 8 mag. The HCN/CO J=1-0 line intensity ratio shows a bimodal behavior with an inflection point at A_V < 3 mag typical of translucent gas and UV-illuminated cloud edges. We find that most of the HCN J=1-0 emission arises from extended gas with n(H2) ~< 10^4 cm^-3, even lower density gas if the ionization fraction is > 10^-5 and electron excitation dominates. This result explains the low-A_V branch of the HCN/CO J=1-0 intensity ratio distribution. Indeed, the highest HCN/CO ratios (~0.1) at A_V < 3 mag correspond to regions of high [CI] 492 GHz/CO J=1-0 intensity ratios (>1) characteristic of low-density PDRs. Enhanced FUV radiation favors the formation and excitation of HCN on large scales, not only in dense star-forming clumps. The low surface brightness HCN and HCO+ J=1-0 emission scale with I_FIR (a proxy of the stellar FUV radiation field) in a similar way. Together with CO J=1-0, these lines respond to increasing I_FIR up to G0~20. On the other hand, the bright HCN J=1-0 emission from dense gas in star-forming clumps weakly responds to I_FIR once the FUV radiation field becomes too intense (G0>1500). The different power law scalings (produced by different chemistries, densities, and line excitation regimes) in a single but spatially resolved GMC resemble the variety of Kennicutt-Schmidt law indexes found in galaxy averages. As a corollary for extragalactic studies, we conclude that high HCN/CO J=1-0 line intensity ratios do not always imply the presence of dense gas.
description: accepted for publication in A&A. 24 pages, 18 figures, plus Appendix. Abridged Abstract
Observation of strong-coupling pairing with weakened Fermi-surface nesting at optimal hole doping in Ca$_{0.33}$Na$_{0.67}$Fe$_2$As$_2$
Creators: name: Shi, Y. -B.
name: Huang, Y. -B.
name: Wang, X. -P.
name: Shi, X.
name: van Roekeghem, A.
name: Zhang, W. -L.
name: Xu, N.
name: Richard, P.
name: Qian, T.
name: Rienks, E. D. L.
name: Thirupathaiah, S.
name: Zhao, K.
name: Jin, C. -Q.
name: Shi, M.
name: Ding, H.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We report an angle-resolved photoemission investigation of optimally-doped Ca$_{0.33}$Na$_{0.67}$Fe$_2$As$_2$. The Fermi surface topology of this compound is similar to that of the well-studied Ba$_{0.6}$K$_{0.4}$Fe$_2$As$_2$ material, except for larger hole pockets resulting from a higher hole concentration per Fe atoms. We find that the quasi-nesting conditions are weakened in this compound as compared to Ba$_{0.6}$K$_{0.4}$Fe$_2$As$_2$. As with Ba$_{0.6}$K$_{0.4}$Fe$_2$As$_2$ though, we observe nearly isotropic superconducting gaps with Fermi surface-dependent magnitudes. A small variation in the gap size along the momentum direction perpendicular to the surface is found for one of the Fermi surfaces. Our superconducting gap results on all Fermi surface sheets fit simultaneously very well to a global gap function derived from a strong coupling approach, which contains only 2 global parameters.
description: 5 pages, 4 figures
A host galaxy study of southern narrow-line Seyfert 1 galaxies
Creators: name: Varglund, I.
name: Järvelä, E.
name: Ciroi, S.
name: Berton, M.
name: Congiu, E.
name: Lähteenmäki, A.
name: Di Mille, F.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We studied seven nearby narrow-line Seyfert 1 (NLS1) galaxies in $J$- and $Ks$-bands with redshifts varying from 0.019 to 0.092. This is the first multi-source study targeting the hosts of southern NLS1 galaxies. Our data was obtained with the FourStar instrument of the 6.5~m Magellan Baade telescope at the Las Campanas Observatory (Chile). The aim of our study is to determine the host galaxy morphologies of these sources by using GALFIT. We were able to model six out of the seven sources reliably. Our conclusion is that all of the reliably modelled sources are disk-like galaxies, either spirals or lenticulars. None of these sources present elliptical morphology. Our findings are in agreement with the hypothesis that disk-like galaxies are the main host of jetted NLS1 galaxies. Taking advantage of observations in two bands, we also produced a $J - Ks$ colour map of each source. Five of the six colour maps show significant dust extinction near the core of the galaxy -- a feature often seen in gamma-ray-detected jetted NLS1 galaxies, and interpreted to be a consequence of a past minor merger.
Statistically bias-minimized peculiar velocity catalogs from Gibbs point processes and Bayesian inference
Creators: name: Sorce, Jenny G.
name: Stoica, Radu S.
name: Tempel, Elmo
Publisher: name: arXiv
Year: 2023
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Galaxy peculiar velocities are excellent cosmological probes provided that biases inherent to their measurements are contained before any study. This paper proposes a new algorithm based on an object point process model whose probability density is built to statistically reduce the effects of Malmquist biases and uncertainties due to lognormal errors in radial peculiar velocity catalogs. More precisely, a simulated annealing algorithm permits maximizing the probability density describing the point process model. The resulting configurations are bias-minimized catalogs. Tests are conducted on synthetic catalogs mimicking the second and third distance modulus catalogs of the Cosmicflows project from which peculiar velocity catalogs are derived. By reducing the local peculiar velocity variance in catalogs by an order of magnitude, the algorithm permits recovering the expected one while preserving the small-scale velocity correlation. It also permits retrieving the expected clustering. The algorithm is then applied to the observational catalogs. The large-scale structure reconstructed with the Wiener-filter technique applied to the bias-minimized observational catalogs matches with great success the local cosmic web as depicted by redshift surveys of local galaxies. These new bias-minimized versions of peculiar velocity catalogs can be used as a starting point for several studies from possibly estimating the most probable Hubble constant, H0, value to the production of simulations constrained to reproduce the local Universe.
description: Accepted for publication in A&A, 26 pages, 22 figures, 3 tables
The Evolution of Complexity in Social Organization - A Model Using Dominance-Subordinate Behaviour in Two Social Wasp Species
Creators: name: Nandi, Anjan K.
name: Bhadra, Anindita
name: Sumana, Annagiri
name: Deshpande, Sujata A.
name: Gadagkar, Raghavendra
Publisher: name: arXiv
Year: 2014
Subjects: subject: Populations and Evolution (q-bio.PE)
subject: FOS: Biological sciences

description: Dominance and subordinate behaviours are important ingredients in the social organizations of group living animals. Behavioural observations on the two eusocial species \textit{Ropalidia marginata} and \textit{Ropalidia cyathiformis} suggest varying complexities in their social systems. The queen of R. cyathiformis is an aggressive individual who usually holds the top position in the dominance hierarchy although she does not necessarily show the maximum number of acts of dominance, while the R. marginata queen rarely shows aggression and usually does not hold the top position in the dominance hierarchy of her colony. These differences are reflected in the distribution of dominance-subordinate interactions among the hierarchically ranked individuals in both the species. The percentage of dominance interactions decrease gradually with hierarchical ranks in R. marginata while in R. cyathiformis it first increases and then decreases. We use an agent-based model to investigate the underlying mechanism that could give rise to the observed patterns for both the species. The model assumes, besides some non-interacting individuals, that the interaction probabilities of the agents depend on their pre-differentiated winning abilities. Our simulations show that if the queen takes up a strategy of being involved in a moderate number of dominance interactions, one could get the pattern similar to R. cyathiformis, while taking up the strategy of very low interactions by the queen could lead to the pattern of R. marginata. We infer that both the species follow a common interaction pattern, while the differences in their social organization are due to the slight changes in queen as well as worker strategies. These changes in strategies are expected to accompany the evolution of more complex societies from simpler ones.
description: 13 pages, 6 figures, 2 tables
Relation between spectral indices and binary fractions in GCs
Creators: name: Zhang, F.
name: Li, L.
name: Han, Z.
name: Gong, X.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Context. We study the relation between the known binary fraction and spectral absorption feature index to judge whether (and potentially which) spectral absorption feature indices are suitable for determining the binary fraction. Aims. The determination of the binary fraction is important in studies of binary star formation, evolutionary population synthesis models, and other works. The number of binary stars is difficult to determine for nearly all stellar systems because the individual stars are need to be resolved photometrically or spectroscopically. By comparison, their integrated spectra or spectral absorption feature indices are relatively easy to obtain. Results. We find that the low-resolution (15\,Å) spectrum is not suitable for this study and the binary fraction type would affect the results: $f$($q$>0.5) and $f$(tot)$^{\rm mc}$ exhibit better correlations with the spectral absorption feature index than $f$(tot)$^{\rm mf}$ and the difference in metallicity would significantly affect the above relationship. % Finally, to eliminate the effects of metallicity, age, and dynamical evolution, we only used those GCs with multiple spectra observed among different regions. % We find that OIII-1, OIII-2, H$_{\rm γF}$, H$_{\rm δF}$, H$_{\rm γA}$, H$_{\rm δA}$, H$_{\rm β}$, Ca4455, C$_2$4668, and TiO$_1$ indices have strong correlations with binary fraction. % The two OIII indices are the most sensitive to the binary fraction, followed by four Balmer indices -- the two narrower central bandpass Balmer indices ($\sim$20Å, F-definition) are more sensitive than the wider two ($\sim$40Å, A-definition) and, lastly, the Ca4455, C$_2$4668, and TiO$_1$ indices.
description: 19 pages, 8 figures
Exchange effects in Coulomb quantum plasmas: Dispersion of waves in 2D and 3D mediums
Creators: name: Andreev, Pavel A.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: We describe quantum hydrodynamic equations with the Coulomb exchange interaction for three and two dimensional plasmas. Explicit form of the force densities are derived. We present non-linear Schrodinger equations (NLSEs) for the Coulomb quantum plasmas with the exchange interaction. We show contribution of the exchange interaction in the dispersion of the Langmuir, and ion-acoustic waves. We consider influence of the spin polarization ratio on strength of the Coulomb exchange interaction. This is important since exchange interaction between particles with same spin direction and particles with opposite spin directions are different. At small particle concentrations $n_{0}<<10^{25}cm^{-3}$ and small polarization the exchange interaction gives small decrease of the Fermi pressure. With increasing of polarization role of the exchange interaction becomes more important, so that it can overcome the Fermi pressure. The exchange interaction also decreases contribution of the Langmuir frequency. Ion-acoustic waves do not exist in limit of large polarization since the exchange interaction changes the sign of pressure. At large particle concentrations $n_{0}>>10^{25}cm^{-3}$ the Fermi pressure prevails over the exchange interaction for all polarizations. Similar picture we obtain for two dimensional quantum plasmas.
description: 8 pages
Time-dependent photoionization spectroscopy of the Seyfert galaxy NGC 3783
Creators: name: Gu, Liyi
name: Kaastra, Jelle
name: Rogantini, Daniele
name: Mehdipour, Missagh
name: Juranova, Anna
name: Costantini, Elisa
name: Li, Chen
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We present an investigation into the spectroscopic properties of non-equilibrium photoionization processes operating in a time-evolving mode. Through a quantitative comparison between equilibrium and time-evolving models, we find that the time-evolving model exhibits a broader distribution of charge states compared to the equilibrium model, accompanied by a slight shift in the peak ionization state depending on the source variability and gas density. The time-evolving code, tpho in SPEX, has been successfully employed to analyze the spectral properties of warm absorbers in the Seyfert galaxy NGC 3783. The incorporation of variability in the tpho model improves the fits of the time-integrated spectra, providing more accurate descriptions to the average charge states of several elements, in particular for Fe which is peaked around Fe XIX. The inferred densities and distances of the relevant X-ray absorber components are estimated to be approximately a few 1E11 per cubic meter and less than 1 pc, respectively. Furthermore, the updated fit suggests a potential scenario in which the observed absorbers are being expelled from the central AGN at the escape velocities. This implies that these absorbers might not play a significant role in the AGN feedback mechanism.
description: accepted for publication in Astronomy and Astrophysics
Forecasts on interacting dark energy with standard sirens
Creators: name: Teixeira, Elsa M.
name: Daniel, Richard
name: Frusciante, Noemi
name: van de Bruck, Carsten
Publisher: name: arXiv
Year: 2023
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We present the predictions with standard sirens at Gravitational Waves detectors, such as the Laser Interferometer Space Antenna (LISA) and the Einstein Telescope (ET), for interacting dark energy theories. We focus on four models characterised by couplings between the dark energy field and the dark matter fluid arising from conformal or disformal transformations of the metric, along with an exponential self-interacting potential. To this purpose we construct mock catalogues and perform a Markov Chain Monte Carlo analysis by considering ET and LISA standard sirens, and also their combination with Baryon Acoustic Oscillations (BAO) and Supernovae Ia (SNIa) data. We find that in all the four models considered, the accuracy on the $H_0$ parameter increases by one order of magnitude at 1$σ$ when compared to the SNIa+BAO data set, possibly shedding light in the future on the origin of the $H_0$-tension. The combination of standard sirens with SNIa+BAO allows to improve the accuracy on some coupling and exponential parameters, hinting at future prospects for constraining interactions in the dark sector.
description: V2: minor corrections, 17 pages, 13 figures, 5 tables, matches published version
Physicochemical inactivation of zoonotic Viruses: Hemorrhagic fever with renal syndrome and lymphocytic choriomeningitis Viruses
Creators: name: Sato, Hiroshi
name: Miyata, Hironori
name: Watanabe, Yoji
Publisher: name: Scandinavian Journal of Laboratory Animal Sciences
Year: 2019

description: To seek the most effective and practical methods of disinfecting and for inactivating two zoonotic viruses, hemorrhagic fever with renal syndrome virus (HFRSV) and lymphocytic choriomeningitis virus (LCMV), we analysed inactivation of the viruses by 8 commonly-used chemical disinfectants and physical treatments. The results demonstrated that alcohols (70% ethanol, 50% isopropanol), formaldehyde (2% formalin), quaternary ammonium chloride (0.05% benzalkonium chloride) and 1% saponated cresol were virucidal on more than 99.9% of the infectious virus particles. HFRSV was more resistant than LCMV on several treatments. No significant difference was observed in strains of HFRSV. Quaternary ammonium chloride and saponated cresol diluted with hot water (>60°C), are considered to be the reagents of choice for disinfecting the two zoonotic viruses because of their long-term effectiveness and mild corrosive action to metals. Spraying of alcohols has proven to be a suitable means for decontaminating instruments, and experiments tools in limited areas of animal laboratories
description: Scandinavian Journal of Laboratory Animal Sciences, Vol. 15 No. 3 (1988)