cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
The intrinsic X-ray luminosity distribution of an optically-selected SDSS quasar population
Creators: name: Rankine, Amy L.
name: Aird, James
name: Ruiz, Angel
name: Georgakakis, Antonis
Publisher: name: arXiv
Year: 2023
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: In active galactic nuclei, the relationship between UV and X-ray luminosity is well studied (often characterised by $α_\text{ox}$) but often with heterogeneous samples. We have parametrized the intrinsic distribution of X-ray luminosity, $L_\text{X}$, for the optically-selected sample of SDSS quasars in the Stripe 82 and XXL fields across redshifts 0.5-3.5. We make use of the available XMM observations and a custom pipeline to produce Bayesian sensitivity curves that are used to derive the intrinsic X-ray distribution in a hierarchical Bayesian framework. We find that the X-ray luminosity distribution is well described by a Gaussian function in ${\log_{10}}L_\text{X}$ space with a mean that is dependent on the monochromatic 2500A UV luminosity, $L_{2500}$. We also observe some redshift dependence of the distribution. The mean of the $L_\text{X}$ distribution increases with redshift while the width decreases. This weak but significant redshift dependence leads to $L_{2500}$-$L_\text{X}$ and $L_{2500}$-$α_\text{ox}$ relations that evolve with redshift, and we produce a redshift- and $L_{2500}$-dependent $α_\text{ox}$ equation. Neither black hole mass nor Eddington ratio appear to be potential drivers of the redshift evolution.
description: 18 pages, 16 figures (including appendices). Accepted for publication in MNRAS
Revisiting Leptogenesis in a SUSY SU(5) x T' Model of Flavour
Creators: name: Meroni, A.
name: Molinaro, E.
name: Petcov, S. T.
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We investigate the generation of the baryon asymmetry of the Universe within a SUSY SU(5) x T' model of flavour, which gives rise to realistic masses and mixing patterns for quarks and leptons. The model employs the see-saw mechanism for generation of the light neutrino masses and the baryon asymmetry is produced via leptogenesis. We perform detailed calculations of both the CP violating lepton asymmetries, originating from the decays of the heavy Majorana neutrinos operative in the see-saw mechanism, and of the efficiency factors which account for the lepton asymmetry wash-out processes in the Early Universe. The latter are calculated by solving numerically the system of Boltzmann equations describing the generation and the evolution of the lepton asymmetries. The baryon asymmetry in the model considered is proportional to the J_{CP} factor, which determines the magnitude of CP violation effects in the oscillations of flavour neutrinos. The leptogenesis scale can be sufficiently low, allowing to avoid the potential gravitino problem.
description: 14 pages, 1 figure; published version
A topologically charged four-dimensional wormhole and the energy conditions
Creators: name: Ahmed, Faizuddin
Publisher: name: arXiv
Year: 2023
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In this research work, our primary focus revolves around the examination of a specific category of traversable wormholes known as topologically charged generalized Schwarzschild-Simpson-Visser-type wormhole, $ds^2=-\Big(1-\frac{2\,M}{\sqrt{x^2+b^2}}\Big)\,dt^2+\Big(1-\frac{2\,M}{\sqrt{x^2+b^2}}\Big)^{-1}\,\Big(\frac{dx^2}{α^2}\Big)+(x^2+a^2)\,(dθ^2+\sin^2 θ\,dϕ^2)$. This wormhole is uniquely defined by a pair of key parameters (length scales $a$ and $b$), together with the global monopole charge $α$. A noteworthy outcome of our investigation is the observation that the energy-momentum tensor associated with this wormhole complies with both the weak energy condition (WEC) and the null energy condition (NEC). Furthermore, incorporation of global monopole charge introduces a substantial influence on the curvature properties of wormhole space-time and various associated physical quantities derived from this geometry.
description: 19 pages; 6 figures, versionv2, published in JCAP (https://doi.org/10.1088/1475-7516/2023/11/082)
Costs of Delivering Groceries and Frozen Foods to Restaurants in Combined or Separate Loads
Creators: name: Karitas, James J.
name: Karitas, James J.
Publisher: name: Unknown
Year: 1977
Subjects: subject: Labor and Human Capital
subject: Marketing
subject: FOS: Economics and business
subject: Production Economics
subject: Research and Development/Tech Change/Emerging Technologies

description: Excerpt from the report Preface: One out of every three meals is eaten away from home in the United States. This amounts to $40 billion or 29 percent of the $138 billion spent for food in 1973. In the next 10 years institutional feeding is expected to double and two out of three meals will be eaten away from home. Faced with rising costs, the institutional wholesalers supplying food service operators are constantly seeking ways of increasing efficiency in their distribution operations. This study was conducted to assist these distributors to pinpoint delivery costs by determining the relative costs of shipping combined loads of groceries and frozen foods on dual-purpose delivery vehicles with the costs of using single-purpose vehicles and separate deliveries. Determination of these costs can guide the distributor in selecting delivery equipment and in adopting methods of operation that produce lower overall costs.
Who's who : memory updating and character reference in children's narratives
Creators: name: McNiven, Cristy L.
Publisher: name: University of British Columbia
Year: 2010

description: This study investigated whether individual differences in working memory updating and adequate reference to story characters in narrative discourse were related in a group of typically-developing children from kindergarten through second grade. It also documented developmental trends in both of these abilities, and examined factors that may have contributed to the difficulty of clearly referring to story characters. The results indicate that the ability to update working memory is related to referential adequacy in children 5 to 8 years of age, with all three updating tasks (visual, auditory, and verbal) correlating moderately and significantly with referential adequacy scores. The participants were most successful when maintaining reference to story characters, and had more difficulty when introducing and reintroducing characters. An analysis of the three referential functions showed that updating was significantly related to children’s adequate maintenance and reintroduction scores. The strongest relationship occurred between updating and maintenance, which was unexpected, and may be specific to this developmental window when children are continuing to develop the linguistic skills required for clearly referring to characters. The bivariate correlations among the updating tasks were all moderate and significant. The consistent correlations amongst the updating tasks, as well as the significant moderate correlation between the visual updating task and referential adequacy, suggest that domain-general resources are involved in updating. This study is the first to investigate the possible link between updating abilities and language production in children. Although these findings are preliminary, they point to a relationship between updating and adequate reference to story characters in narrative production in 5- to 8-year-old children.
title: Teacher Labor Markets in Metro Atlanta During the COVID-19 Pandemic
Creators: name: Barry, Sarah
name: Sass, Tim
Publisher: name: Georgia Policy Labs
Year: 2023

description: The COVID-19 pandemic affected teachers in myriad, unprecedented ways. In spring 2020, most schools in the United States shut their doors and were forced to switch to remote learning. Changes in instructional mode, coupled with general health and economic concerns brought on by the pandemic, negatively impacted teachers and led to increases in levels of stress and burnout.

In this report, Sarah S. Barry and Tim R. Sass use administrative data covering SY 2016–17 through fall of SY 2021–22 from two metro-Atlanta school districts (DeKalb County School District and Gwinnett County Public Schools) to analyze trends in teacher hiring and retention. The data include information on teacher employment status as well as information on teacher experience, certification, subject area taught, school assignment, and teacher demographic characteristics. We aim to provide a better understanding of teacher labor markets in the context of the COVID-19 pandemic and determine appropriate policy interventions in response to changes in teacher mobility and retention.

We find that, while there have been changes in attrition and teacher hiring over time, most post-pandemic observations appear to have reverted to pre-pandemic trends. Attrition in both districts initially decreased after the onset of the pandemic. Attrition in Gwinnett remains lower than the pre-pandemic trend, while attrition in DeKalb is slightly higher than before the pandemic. In both districts, the proportion of teachers with 30 or more years of experience who left their respective districts has been on an upward trend since at least SY 2016–17. It does not appear that the pandemic has led to a worsening of teacher attrition in hard-to-staff subject areas. In addition, the proportion of new hires in both districts initially dropped soon after the start of the pandemic. The proportion of new teachers in Gwinnett has since increased relative to the pre-pandemic period. In Dekalb, the proportion of new teachers is well below pre-pandemic levels, though changes have not impacted average student-teacher ratios.

Pre-pandemic challenges to recruiting and retaining teachers remain, particularly in “high-need” areas like math and science and special education, and warrant careful analysis of pandemic-era financial incentives (such as those used by the two districts in this study) to determine if these policies could help address teacher shortages in specific subject areas. Further, districts should carefully consider pre-pandemic conditions as they look to better understand any attrition and hiring issues they face.
Molecular Outflows Identified in the FCRAO CO Survey of the Taurus Molecular Cloud
Creators: name: Narayanan, Gopal
name: Snell, Ronald
name: Bemis, Ashley
Publisher: name: arXiv
Year: 2012
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The 100 square degree FCRAO CO survey of the Taurus molecular cloud provides an excellent opportunity to undertake an unbiased survey of a large, nearby, molecular cloud complex for molecular outflow activity. Our study provides information on the extent, energetics and frequency of outflows in this region, which are then used to assess the impact of outflows on the parent molecular cloud. The search identified 20 outflows in the Taurus region, 8 of which were previously unknown. Both $^{12}$CO and $^{13}$CO data cubes from the Taurus molecular map were used, and dynamical properties of the outflows are derived. Even for previously known outflows, our large-scale maps indicate that many of the outflows are much larger than previously suspected, with eight of the flows (40%) being more than a parsec long. The mass, momentum and kinetic energy from the 20 outflows are compared to the repository of turbulent energy in Taurus. Comparing the energy deposition rate from outflows to the dissipation rate of turbulence, we conclude that outflows by themselves cannot sustain the observed turbulence seen in the entire cloud. However, when the impact of outflows is studied in selected regions of Taurus, it is seen that locally, outflows can provide a significant source of turbulence and feedback. Five of the eight newly discovered outflows have no known associated stellar source, indicating that they may be embedded Class 0 sources. In Taurus, 30% of Class I sources and 12% of Flat spectrum sources from the Spitzer YSO catalogue have outflows, while 75% of known Class 0 objects have outflows. Overall, the paucity of outflows in Taurus compared to the embedded population of Class I and Flat Spectrum YSOs indicate that molecular outflows are a short-lived stage marking the youngest phase of protostellar life.
description: Accepted for publication in MNRAS; 28 pages, 60 figures, 5 tables. For full abstract, see paper
Historietas para la Naturaleza. Registro Gráfico de la I Jornada de Ilustración, Divulgación y Comunicación de las Ciencias de la Conservación
Creators: name: Rojas, Francisca Cárcamo
name: Larraín-Barrios, Bárbara
name: Martínez-Harms, María José
Publisher: name: Zenodo
Year: 2023
Subjects: cómic; divulgación; conservación; interdisciplina; historieta; ilustración

description: Historietas para la Naturaleza contiene el registro gráfico realizado través del arte del cómic de la I Jornada de Ilustración, Divulgación y Comunicación de las Ciencias de la Conservación realizada en el Museo Artequín el 23 de septiembre del 2022 en la ciudad de Viña del Mar, Chile. En ella se relatan las experiencias y aprendizajes vividos por ponentes, organizadores y público asistente compuesto por artistas, científicos y representantes de la sociedad civil.
Optimal ancilla-free phase-covariant telecloning of qudits via nonmaximally entangled states
Creators: name: Wang, Xin-Wen
name: Yang, Guo-Jian
Publisher: name: arXiv
Year: 2011
Subjects: subject: Quantum Physics (quant-ph)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We study the one-to-two phase-covariant telecloning of a qudit without ancilla. We show that the fidelity of the two clones can reach that of the clones in the optimal ancilla-based one-to-two phase-covariant cloning and telecloning, i.e., the limitation of quantum mechanics. More interestingly, it is a nonmaximally entangled state rather than the maximally entangled state that can be used to realize such a telecloning task.
description: The improvement of Phys. Rev. A 79, 064306 (2009); see also Chin. Phys. Lett. 27, 100303 (2010)
A global analysis of apparent trends in abundance and recruitment of large tunas and billfishes inferred from Japanese longline catch and effort data
Creators: name: Ahrens, Robert Norman Matthew
Publisher: name: University of British Columbia
Year: 2010

description: There has been substantial debate in recent years about the extent to which industrialized fishing has affected tunas and other large pelagic predator populations and altered the pelagic community. Variations in the type of data incorporated into assessments, statistical treatment of catch rate information, and different assessment methodologies have lead to diverging interpretations of stock levels and the sustainability of current large-scale industrialized fisheries. Simple nominal catch rates derived from Japanese longline catch and effort data paint a biased picture of the impact of industrialized fishing on the large pelagic tuna and billfish community, suggesting that abundance as of 2002 was only 10% of pre-1950 levels. Methods that correct for the spatial expansion, shift in distribution, and change in species targeting of the Japanese fleet, by averaging catch rates over spatial areas while imputing missing catch rate values, indicate a less severe decline with tuna and billfish stock reduced to an average of 50% of pre 1950 levels. For the majority of stocks, simple assessment methods indicate these relative abundance trends may still be biased and additional information sources are necessary to constrain assessments and evaluate the status of the stocks. With the incorporation of prior information on current fishing mortality rates and in some instances stock productivity, assessments indicate that a number of stocks are over-fished and experiencing over-fishing. Optimization models based on the same catch and effort data, aimed a redistributing fishing effort to maximize profits subject to fishing mortality constraints, suggest economic efficiencies can be gained in the long term if effort reductions are coupled with closed areas. Areas open to fishing should be placed where potential value and recruitments into the fishery are high. Fisheries are complex adaptive systems and it is not necessarily apparent how data resulting from fishing activities relate to the states of the assemblage of species captured. Careful consideration must be given to the nature of the sampling processes that give rise to these data. Without such consideration or alternative sources of information, inferences about impacts of fisheries on natural systems can be severely distorted.
Well-posedness and stability results for the Gardner equation
Creators: name: Alejo, Miguel A.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics
subject: 35Q51, 35Q53 (Primary) 49K40, 47J35 (Secondary)

description: In this article we present local well-posedness results in the classical Sobolev space H^s(R) with s > 1/4 for the Cauchy problem of the Gardner equation, overcoming the problem of the loss of the scaling property of this equation. We also cover the energy space H^1(R) where global well-posedness follows from the conservation laws of the system. Moreover, we construct solitons of the Gardner equation explicitly and prove that, under certain conditions, this family is orbitally stable in the energy space.
description: 1 figure. Accepted for publication in Nonlin.Diff Eq.and Appl
Quantum uncertainty of gravitational field and entanglement in superposed massive particles
Creators: name: Sugiyama, Yuuki
name: Matsumura, Akira
name: Yamamoto, Kazuhiro
Publisher: name: arXiv
Year: 2023
Subjects: subject: Quantum Physics (quant-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Investigating the quantum nature of gravity is an important issue in modern physics. Recently, studies pertaining to the quantum superposition of gravitational potential have garnered significant interest. Inspired by Mari \textit{et al.} [Sci. Rep. {\bf 6} 22777 (2016)] and Baym and Ozawa [Proc. Natl. Acad. Sci. U.S.A. {\bf 106}, 3035 (2009)], Belenchia \textit{et al.} [Phys. Rev. D {\bf 98}, 126009 (2018)] considered a gedanken experiment involving such a quantum superposition and mentioned that the superposition renders causality and complementarity inconsistent. They resolved this inconsistency by considering the quantized dynamical degrees of freedom of gravity. This suggests a strong relationship between the quantum superposition of the gravitational potential and the quantization of the gravitational field. In our previous study [Phys. Rev. D {\bf 106}, 125002 (2022)], we have shown that the quantum uncertainty of a field guarantees the consistency between causality and complementarity. In this study, we focus on the entanglement between two particles' states due to the electromagnetic/gravitational potential and investigate its relationship with quantum uncertainty, causality, and complementarity. Our numerical analyses show that the quantum uncertainty of the electromagnetic/gravitational field results in vacuum fluctuations and prohibits the entanglement between two particles' states when causality is satisfied. We further demonstrate that complementarity holds when the particles do not get entangled. The uncertainty relation does not cause the entanglement between two particles' states, which guarantees complementarity.
description: 15pages, 5 figures
Self-assembly of spherical interpolyelectrolyte complexes from oppositely charged polymers
Creators: name: Baulin, Vladimir A.
name: Trizac, Emmanuel
Publisher: name: arXiv
Year: 2012
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Biological Physics (physics.bio-ph)
subject: FOS: Physical sciences

description: The formation of inter-polyelectrolyte complexes from the association of oppositely charged polymers in an electrolyte is studied. The charged polymers are linear oppositely charged polyelectrolytes, with possibly a neutral block. This leads to complexes with a charged core, and a more dilute corona of dangling chains, or of loops (flower-like structure). The equilibrium aggregation number of the complexes (number of polycations m+ and polyanions m-) is determined by minimizing the relevant free energy functional, the Coulombic contribution of which is worked out within Poisson-Boltzmann theory. The complexes can be viewed as colloids that are permeable to micro-ionic species, including salt. We find that the complexation process can be highly specific, giving rise to very localized size distribution in composition space (m+,m-).
description: Soft Matter, in press 2012
Moving Bedforms Control CO2 Production and Distribution in Sandy River Sediments
Creators: name: Schulz, Hanna
name: Teitelbaum, Yoni
name: Lewandowski, Jörg
name: Singer, Gabriel
name: Arnon, Shai
Publisher: name: Humboldt-Universität zu Berlin
Year: 2023
Subjects: subject: 550 Geowissenschaften

description: Streams and rivers play an important role in the global carbon cycle. The origins of CO2 in streams are often poorly constrained or neglected, which is especially true for CO2 originating from heterotrophic metabolism in streambeds. We hypothesized that sediment movement will have a direct effect on stream metabolism, and thus, the aim of this study was to quantify the effect of moving bedforms on the production of CO2 in sandy streambeds. We conducted flume experiments where we used planar optodes to measure the distributions of O2 and CO2 under various streambed celerities. We combined these measurements with an assessment of bed morphodynamics and modeling to calculate O2 consumption and CO2 production rates. Our results indicate that sediment transport can strongly influence streambed metabolism and CO2 production. We found that bedform celerity controls the shape of the hyporheic zone and exchange flux, and is directly linked to the spatial and temporal distributions of O2 and CO2. It was also found that the most pronounced change in CO2 production occurred when the bed changed from stationary conditions to a slowly moving bed. A more gradual increase in O2 consumption and CO2 production rates was observed with further increase in celerity. Our study also points out that bedform movement causes hydraulic isolation between the moving and the non‐moving fraction of the streambed that can lead to a transient storage of CO2 in deeper sediments, which may be released in bursts during bed scour.
Cost Comparison of Five Institutional Food Delivery Systems
Creators: name: Karitas, James J.
name: Karitas, James J.
Publisher: name: Unknown
Year: 1978
Subjects: subject: Labor and Human Capital
subject: Marketing
subject: FOS: Economics and business
subject: Production Economics
subject: Research and Development/Tech Change/Emerging Technologies

description: In this study, costs are compared for several methods of delivering combined loads of frozen foods and groceries from local warehouses to food service establishments. Five basic systems were studied and costs were developed for a fleet of 12 vehicles with 18-foot truck bodies. Costs were based on delivering 3,900 cases per peak day to 300 customers, with an average order of 13 cases. Frozen foods ranged from 20 to 50 percent of the truckload and groceries and some nonfrozen perishables comprised the remainder. The basic delivery systems were (1) noninsulated, nonrefrigerated trucks with 17.5-cubic foot insulated containers, (2) noninsulated, nonrefrigerated trucks with 50-cubic foot insulated containers, (3) partly insulated, partly refrigerated trucks with fixed bulkhead, (4) fully insulated, 50-percent refrigerated trucks with movable bulkhead, and (5) fully insulated, fully refrigerated trucks with insulating blankets. Several methods were compared based on annual ownership, operating, and labor costs. The findings were as follows: At the 20-percent level of frozen foods, using noninsulated, nonrefrigerated trucks with 50-cubic foot insulated containers resulted in the lowest cost—$22,299 lower than the highest cost method. At the 30-percent level, this method also produced the lowest cost—$26,864 lower than the highest cost method. At the 40-percent level, using partly insulated, partly refrigerated trucks with fixed bulkhead resulted in the lowest cost. At the 40- and 50-percent levels, respective costs were $11,981 and $7,273 lower than the highest cost method. At all levels, using fully insulated, fully refrigerated single-compartment trucks resulted in the highest cost. Differences between the higher cost of movable over fixed bulkheads were $7,328 at the 30-percent, $5,183 at the 40-percent, and $2,472 at the 50-percent levels. Because of this nominal difference and the obvious flexibility of movable bulkheads, an operator may decide to use the movable bulkhead. Regardless of the level of frozen foods, labor costs between the methods only varied about $7,363 annually, whereas ownership and operating costs combined varied about $28,475.
Mechanical annealing of metallic electrodes at the atomic scale
Creators: name: Sabater, C.
name: Untiedt, C.
name: Palacios, J. J.
name: Caturla, M. J.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The process of creating an atomically defined and robust metallic tip is described and quantified using measurements of contact conductance between gold electrodes and numerical simulations. Our experiments show how the same conductance behavior can be obtained for hundreds of cycles of formation and rupture of the nanocontact by limiting the indentation depth between the two electrodes up to a conductance value of approximately $5G_{0}$ in the case of gold. This phenomenon is rationalized using molecular dynamics simulations together with density functional theory transport calculations which show how, after repeated indentations (mechanical annealing), the two metallic electrodes are shaped into tips of reproducible structure. These results provide a crucial insight into fundamental aspects relevant to nano-tribology or scanning probe microscopies.
C-reactive protein, interleukin-6 and pre-eclampsia: large-scale evidence from the GenPE case-control study
Creators: name: Serrano, Norma C.
name: Guio, Elizabeth
name: Becerra-Bayona, Silvia M.
name: Quintero-Lesmes, Doris C.
name: Bautista-Niño, Paula K.
name: Colmenares-Mejía, Claudia
name: Páez, María C.
name: Luna, María L.
name: Díaz, Luis A.
name: Ortiz, Ricardo
name: Beltrán, Mónica
name: Monterrosa, Álvaro
name: Miranda, Yezid
name: Mesa, Clara M.
name: Saldarriaga, Wilmar
name: Casas, Juan P.
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: Medicine
subject: Sociology
subject: FOS: Sociology
subject: Immunology
subject: FOS: Clinical medicine
subject: 19999 Mathematical Sciences not elsewhere classified
subject: FOS: Mathematics
subject: Cancer
subject: Science Policy

description: Multiple small studies have suggested that women with pre-eclampsia present elevated levels of C-reactive protein (CRP) and interleukin-6 (IL-6). However, little is known regarding the source of this CRP and IL-6 increase. Therefore, the aim of this study was to evaluate the relationship between CRP and IL-6 levels with pre-eclampsia considering different confounding factors. Using data from a large Colombian case-control study (3,590 cases of pre-eclampsia and 4,564 normotensive controls), CRP and IL-6 levels were measured in 914 cases and 1297 controls. The association between maternal serum levels of CRP and IL-6 with pre-eclampsia risk was evaluated using adjusted logistic regression models. Pre-eclampsia was defined as presence of blood pressure ≥140/90 mmHg and proteinuria ≥300mg/24 h (or ≥1 + dipstick). There was no evidence of association between high levels of CRP and IL-6 with pre-eclampsia after adjusting for the following factors: maternal and gestational age, ethnicity, place and year of recruitment, multiple-pregnancy, socio-economic position, smoking, and presence of infections during pregnancy. The adjusted OR for 1SD increase in log-CRP and log-IL-6 was 0.96 (95%CI 0.85, 1.08) and 1.09 (95%CI 0.97, 1.22), respectively. Although previous reports have suggested an association between high CRP and IL-6 levels with pre-eclampsia, sample size may lack the sufficient power to draw robust conclusions, and this association is likely to be explained by unaccounted biases. Our results, the largest case-control study reported up to date, demonstrate that there is not a causal association between elevated levels of CRP and IL-6 and the presence of pre-eclampsia.
Effective gravitational action for 2D massive Majorana fermions on arbitrary genus Riemann surfaces
Creators: name: Namuduri, Manojna
name: Bilal, Adel
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We explore the effective gravitational action for two-dimensional massive Euclidean Majorana fermions in a small mass expansion, continuing and completing the study initiated in a previous paper. We perform a detailed analysis of local zeta functions, heat kernels, and Green's functions of the Dirac operator on arbitrary Riemann surfaces. We obtain the full expansion of the effective gravitational action to all orders in $m^2$. For genus one and larger, this requires the understanding of the role of the zero-modes of the (massless) Dirac operator which is worked out. Besides the Liouville action, at order $m^0$, which only involves the background metric and the conformal factor $σ$, the various contributions to the effective gravitational action at higher orders in $m^2$ can be expressed in terms of integrals of the renormalized Green's function at coinciding points of the squared (massless) Dirac operator, as well as of higher Green's functions. In particular, at order $m^2$, these contributions can be re-written as a term $\int e^{2σ}\, σ$ characteristic of the Mabuchi action, much as for 2D massive scalars, as well as several other terms that are multi-local in the conformal factor $σ$ and involve the Green's functions of the massless Dirac operator and the renormalized Green's function, but for the background metric only.
description: 94 pages, 1 figure, references added, minor corrections
Analytical performance and user-friendliness of five novel point-of-care D-dimer assays
Creators: name: Heerink, Jorn S.
name: Gemen, Eugenie
name: Oudega, Ruud
name: Hopstaken, Rogier
name: Geersing, Geert-Jan
name: Kusters, Ron
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: Space Science
subject: Medicine
subject: Genetics
subject: FOS: Biological sciences
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Science Policy
subject: Hematology
subject: 60506 Virology

description: D-dimer testing combined with a clinical assessment has become a standard pathway for ruling-out venous thromboembolism (VTE). Recently, novel Point-of-Care (POC) D-dimer assays have been introduced, enabling low-volume blood sampling for rapid exclusion of VTE in a one-step procedure. We assessed the analytical validity and user-friendliness of a set of these novel POC D-dimer assays, and compared the results with a standard laboratory assay. Plasma samples were run on our reference assay (STA-Liatest D-di PLUS®) and five POC assays: Nano-Checker 710®, AFIAS-1®; iChroma-II®; Standard F200® and Hipro AFS/1®). After evaluating imprecision, Pearson Product-Moment correlation coefficients were calculated, Passing Bablok regression was performed and Bland-Altman plots were generated. User-friendliness was evaluated using the System Usability Scale (SUS). A set of 238 plasma samples of patients clinically suspected of VTE in general practice was available for analysis. Only one POC D-dimer assay (Nano-Checker 710) demonstrated an insufficient degree of imprecision. Pearson correlation coefficients and mean biases ranged from 0.68 to 0.93 and −165 to −53 μg/L respectively, and concordance with our reference assay varied from 71.8% to 89.5% using a 500 μg/L cut-off point. While we found considerable variation in overall user-friendliness, most devices were judged easy to use. In view of our findings regarding analytical performance and user-friendliness, we consider most of the novel POC D-dimer assays can be used in settings outside of the laboratory such as general practice, combining the possibility of multi-testing with low-volume capillary blood sampling and processing times of less than 15 min.
Analytical performance and user-friendliness of five novel point-of-care D-dimer assays
Creators: name: Heerink, Jorn
name: Gemen, Eugenie
name: Oudega, Ruud
name: Hopstaken, Rogier
name: Geersing, Geert-Jan
name: Kusters, Ron
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: Space Science
subject: Medicine
subject: Genetics
subject: FOS: Biological sciences
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Science Policy
subject: Hematology
subject: 60506 Virology

description: D-dimer testing combined with a clinical assessment has become a standard pathway for ruling-out venous thromboembolism (VTE). Recently, novel Point-of-Care (POC) D-dimer assays have been introduced, enabling low-volume blood sampling for rapid exclusion of VTE in a one-step procedure. We assessed the analytical validity and user-friendliness of a set of these novel POC D-dimer assays, and compared the results with a standard laboratory assay. Plasma samples were run on our reference assay (STA-Liatest D-di PLUS®) and five POC assays: Nano-Checker 710®, AFIAS-1®; iChroma-II®; Standard F200® and Hipro AFS/1®). After evaluating imprecision, Pearson Product-Moment correlation coefficients were calculated, Passing Bablok regression was performed and Bland-Altman plots were generated. User-friendliness was evaluated using the System Usability Scale (SUS). A set of 238 plasma samples of patients clinically suspected of VTE in general practise was available for analysis. Only one POC D-dimer assay (Nano-Checker 710) demonstrated an insufficient degree of imprecision. Pearson correlation coefficients and mean biases ranged from 0.68 to 0.93 and −165 to −53 μg/L respectively, and concordance with our reference assay varied from 71.8% to 89.5% using a 500 μg/L cut-off point. While we found considerable variation in overall user-friendliness, most devices were judged easy to use. In view of our findings regarding analytical performance and user-friendliness, we consider most of the novel POC D-dimer assays can be used in settings outside of the laboratory such as general practice, combining the possibility of multi-testing with low-volume capillary blood sampling and processing times of less than 15 min.
Spectroscopic survey of higher-lying states of $B_c$ meson family
Creators: name: Li, Xue-Jian
name: Li, Yu-Shuai
name: Wang, Fu-Lai
name: Liu, Xiang
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: In this work, we investigate the spectroscopy of higher $B_c$ mesons, with a special focus on the consideration of the unquenched effects. To account for such effects, we employ the modified Godfrey-Isgur model and introduce a screening potential. The resulting mass spectrum of the concerned higher $B_c$ states is then presented, showing significant deviations after considering the unquenched effects. This emphasizes the importance of considering the unquenched effects when studying of the higher $B_c$ mesons. Furthermore, we determine the corresponding spatial wave functions of these $B_c$ mesons, which have practical applications in subsequent studies of their decays. These decays include two-body Okuba-Zweig-Iizuka allowed strong decays, dipion transitions between $B_c$ mesons, radiative decays, and some typical weak decays. With the ongoing high-luminosity upgrade of the Large Hadron Collider, we expect the discovery of additional $B_c$ states in the near future. The knowledge gained from the mass spectrum and the different decay modes will undoubtedly provide valuable insights for future experimental explorations of these higher $B_c$ mesons.
description: 30 pages, 7 figures and 17 tables
An Evaluation of Two Bread-Delivery Methods from Supplier to Retail Store
Creators: name: Mongelli, Robert C.
name: Mongelli, Robert C.
Publisher: name: Unknown
Year: 1982
Subjects: subject: Labor and Human Capital
subject: Marketing
subject: FOS: Economics and business
subject: Production Economics
subject: Research and Development/Tech Change/Emerging Technologies

description: Excerpts from the report: This study discusses distribution of bread from bakery to retail store. Data were obtained on costs of labor, equipment, and material for obtaining the retail order, assembling it, loading the truck, and delivering to retail outlets. The objectives of the study were: to observe, describe, and evaluate the systems presently used for delivering bread items, and to describe alternative systems by which small inner-city retailers may continue to acquire bread items if the direct delivery to their store is no longer economically feasible.
title: Policy Brief: Teacher Labor Markets in Metro Atlanta During the COVID-19 Pandemic
Creators: name: Barry, Sarah
Publisher: name: Georgia Policy Labs
Year: 2023

description: We analyze the impacts of the COVID-19 pandemic on teacher labor market decisions in two large school districts in metro Atlanta: Gwinnett County Public Schools and DeKalb County School District. After schools were forced to close in spring 2020, teachers in both districts were more likely to continue teaching the following fall than in pre-pandemic years. Correspondingly, in fall 2020, the proportion of newly hired teachers in each district was less than in prior years. As the general labor market improved, retention rates returned to pre-pandemic levels.
A model for the two component gamma-ray spectra observed from the gamma-ray binaries
Creators: name: Bednarek, W.
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Observations of two well known binary systems (LS 5039 and LS I +61 303) with the satellite and Cherenkov telescopes revealed the broad band $γ$-ray spectra which seems to show two components, the first at GeV energies, showing exponential cut-off at a few GeV, and the second at TeV energies which does not fit well to the extrapolation of spectrum from the GeV energy range. We propose that such two component spectrum is produced by two populations of electrons which appear within the binary system as a result of acceleration on a double shock structure separated by a contact discontinuity. Such structure is created within the binary system as a result of the interaction of the pulsar and massive star winds. The shocks from the side of the pulsar and the massive star have different proprieties which allow acceleration of electrons to different maximum energies. These two populations of electrons produce two component $γ$-ray spectra caused by the Inverse Compton (IC) scattering of stellar radiation. The example calculations, performed in terms of the anisotropic IC $e^\pm$ pair cascade model, for the location of the pulsar at the periastron and apastron passages confirm the high energy emission features observed from LS I +61 303.
description: 12 pages, 2 figures, 2 tables, MNRAS Let. in press
Kerr nonlinearity induced strong spin-magnon coupling
Creators: name: Ji, Feng-Zhou
name: An, Jun-Hong
Publisher: name: arXiv
Year: 2023
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: One pillar of quantum magnonics is the exploration of the utilization of the mediation role of magnons in different platforms to develop quantum technologies. The efficient coupling between magnons and various quantum entities is a prerequisite. Here, we propose a scheme to enhance the spin-magnon coupling by the magnonic Kerr nonlinearity in a YIG sphere. We find that the Kerr-enhanced spin-magnon coupling invalidates the widely used single-Kittel-mode approximation to magnons. It is revealed that the spin decoherence induced by the multimode magnons in the strong-coupling regime becomes not severe, but suppressed, manifesting as either population trapping or persistent Rabi-like oscillation. This anomalous effect is because the spin changes to be so hybridized with the magnons that one or two bound states are formed between them. Enriching the spin-magnon coupling physics, the result supplies a guideline to control the spin-magnon interface.
Elliptic (N,N^\prime)-Soliton Solutions of the lattice KP Equation
Creators: name: Yoo-Kong, Sikarin
name: Nijhoff, Frank
Publisher: name: arXiv
Year: 2011
Subjects: subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: Elliptic soliton solutions, i.e., a hierarchy of functions based on an elliptic seed solution, are constructed using an elliptic Cauchy kernel, for integrable lattice equations of Kadomtsev-Petviashvili (KP) type. This comprises the lattice KP, modified KP (mKP) and Schwarzian KP (SKP) equations as well as Hirota's bilinear KP equation, and their successive continuum limits. The reduction to the elliptic soliton solutions of KdV type lattice equations is also discussed.
description: 18 pages
Evaluating Production and Marketing Opportunities Using Market Window and Expected Value Analyses
Creators: name: Mook, Richard G.
name: Jermolowicz, Andrew A.
name: Mook, Richard G.
name: Jermolowicz, Andrew A.
Publisher: name: Unknown
Year: 1991
Subjects: subject: Crop Production/Industries
subject: Marketing
subject: FOS: Economics and business
subject: Research Methods/ Statistical Methods
subject: Market window analysis
subject: expected value
subject: market opportunities
subject: vegetables
subject: fruit

description: Increasing demand for traditional and specialty fruit and vegetable crops has encouraged many financially stressed U.S. farmers to diversify their farm operations to include some form of alternative enterprise. Decisions on whether or not to enter into the production of a new crop are frequently distorted by impractical expectations of returns generally associated with unrealistic estimates of market prices and crop yields. As a result, many of these new enterprises have failed or are only marginally successful. Two relatively simple methods of analysis are presented, which, when combined with the other market evaluation techniques, can provide some insight into the decision of whether or not an enterprise should be undertaken as well as reduce some of the risk of implementing a potentially unprofitable venture.
CP violation in $D^0 \to (K^- K^+, π^- π^+)$ from diquarks
Creators: name: Chen, Chuan-Hung
name: Geng, Chao-Qiang
name: Wang, Wei
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The explanation of the large CP asymmetries in $D^0\to (π^+π^-, K^+K^-)$ decays observed by the LHCb collaboration is likely to call for new physics beyond the CKM paradigm. We explore new contributions caused by the color-sextet scalar diquark, and demonstrate that the diquark with the mass of order 1 TeV and nominal couplings with quarks can generate the CP asymmetries at the percent level. Using the experimental data on branching ratios and CP asymmetries of $D^0\to (π^+π^-, K^+K^-)$, we derive the constraints on the diquark mass and couplings, which can be further examined on hadron colliders in the dijet final states.
description: 9 pages, 3 figures, reference added
Mitochondrial energetics and contents evaluated by flow cytometry in human maternal and umbilical cord blood
Creators: name: Stryhn, Julie Kristine Guldberg
name: Larsen, Jacob
name: Pedersen, Palle Lyngsie
name: Feldthusen, Anne-Dorthe
name: Kvetny, Jan
name: Gæde, Peter Haulund
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: Biochemistry
subject: Medicine
subject: Cell Biology
subject: Genetics
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Neuroscience
subject: Physiology
subject: Biotechnology
subject: Inorganic Chemistry
subject: FOS: Chemical sciences
subject: Hematology

description: Background: Mitochondrial dysfunction may relate to metabolic disorders. The relation between maternal and fetal mitochondrial function needs attention due to heritage. Objectives: To evaluate the use of the staining methods TetraMethylRhodamine Methyl Ester (TMRM) and Mitotracker Green (MTG) for flow cytometric measurements of umbilical cord blood mitochondrial function. Methods: 53 euthyroid at-term pregnant women and their offspring were included by blood collections. The offspring had blood drawn from the clamped umbilical cord. Flow cytometry with MTG, TMRM and Propidium Iodide were performed the following day. A cell count (antibody coating and flow cytometry) was performed for 9 maternal and cord samples. As a quality control, blood of 32 healthy donors was evaluated by flow cytometric analyzes same day as sampling and the following day to test stability of the measurements. Results: Cord mitochondrial measurements were lower than maternal. Maternal and cord mitochondrial function were positively correlated, especially reflected by MTG fluorescence-intensity (FI). Samples stored presented with very changed fluorescence patterns. However, the fluorescence intensity ratios MTG/TMRM of stained white blood cells were related within same day measurements, depicting an extensive and common bioenergetic cellular change. Conclusion: Cord blood flow cytometry by MTG- and TMRM- staining is possible with fluorescence intensity positively correlated to maternal fluorescence intensity. Storage of blood triggers mitochondrial dynamics. The methods are applicable with certain reservations, and they benefit from their non-invasive character compared to mitochondrial evaluation by muscle-biopsies.
Can Planet 9 be an Axion Star?
Creators: name: Di, Haoran
name: Shi, Haihao
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: The anomalous orbits of Trans-Neptunian Objects (TNOs) can be explained by the Planet 9 hypothesis. We propose that the Planet 9 can be an axion star. Axion stars are gravitational bound clusters condensed by QCD axions or axion-like particles (ALPs), which we call axions for brevity. We find that the probability of capturing an axion star by the solar system is the same order of magnitude as the probability of capturing a free floating planet (FFP), and even higher for the case of axion star, with axion star mass $5M_\oplus\approx1.5\times10^{-5}M_\odot$ and $Ω_{\rm{AS}}/Ω_{\rm{DM}}\simeq 1/10$. Although axion star can emit monochromatic signals through two-photon decay, we find that the frequency of decay photon is either not within the frequency range of the radio telescope, or the decay signal is too weak to be detected. Therefore, if Planet 9 is composed by an axion star, it may be difficult to distinguish it from an isolated primordial black hole by spontaneous decay of axion.
description: 7 pages, 2 figures; accepted for publication in Physical Review D