cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
title: Asymptotic analysis of the equations of hydroelastic oscillations in thin-walled elastic pipeline
Creators: name:  Tkachenko,  O.P.
name: Ryabokon , A.S.
Publisher: name: Peter the Great St. Petersburg Polytechnic University
Year: 2021

description: A mathematical model of the dynamics of a curved pipeline as a membrane shell filled with an ideal compressible fluid is constructed. A form of an approximate solution of the model equations is found in which the dimension of the problem reduces by one. An asymptotic analysis of the obtained differential equations is performed for various small parameters. Two systems of model equations with different characteristics are obtained. These systems are transformed into systems of first-order equations in canonical form with explicitly defined Riemann invariants. The characteristics of the obtained systems of equations are found and the main types of waves propagating in a curved pipe are identified. Numerical experiments have been performed. The results obtained correspond to the results from the literature sources.
Neoperla jiangsuensis Chen & Du, sp. nov.
Creators: name: Chen, Zhi-Teng
name: Du, Yu-Zhou
Publisher: name: Zenodo
Year: 2015
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Plecoptera
Perlidae
Neoperla
Neoperla jiangsuensis

description: Neoperla jiangsuensis Chen & Du, sp. nov.
(Figs. 1–9)
 Adult habitus. General color light yellow patterned with light brown. Head mostly pale yellow except for dark brown area covering ocelli and a trapezoidal patch on anterior portion of frons; compound eyes dark, antennae dark brown (Figs. 1, 2). Pronotum disc pale brown with medial portion brown (Figs. 1, 2). Wing membrane subhyaline, veins brown. Coxae and femur pale, tibiae and tarsi brown. Abdomen brown, hemiterga darker brown. Cerci dark Male. Forewing length 11.0–11.5 mm, hindwing length 10.0–10.5 mm. Terga 1–8 with brown lateral stripes. The posterior margin of tergum 7 with upraised process, covered with dense sensilla basiconica. Tergum 8 with a recurved oval process bearing small spines at distal margin (Figs. 3–4, 5). Tergum 9 without sensilla basiconica. Hemitergal processes of tergum 10 slightly curved (Figs. 3, 4). Aedeagal tube plump and slightly sclerotized, apically with a patch of small spines. Aedeagal sac slightly longer than tube and curved ventrally; subapically with two curving C-shaped rows of large stout spines laterally; apically forming a double ear-shaped membranous structure. (Figs. 6–7, 8).
 Female. Forewing length 11.5–12.0 mm, hindwing length 10.0–10.5 mm. Subgenital plate small, with a small median sclerotized area; sternum 9 with two lateroventral brown spots (Fig. 9).
 Type material. Holotype: male, China: Jiangsu Province, Xuyi, Tieshan Temple, 32.4404 N, 118.2807 E, 2014. VI.1, Chen Zhi-Teng & Wang Zhen. Paratypes: 68 males and 9 females, same data as holotype.
 Etymology. The species is named after the type locality, Jiangsu Province.
 Diagnosis. The new species can be distinguished by the aedeagal sac with two C-shaped rows of large stout spines laterally and double ear-shaped membranous lobes apically. Additionally, the aedeagal tube has a patch of small spines apically.
 Remarks. The new species is a member of the N. montivaga group (Kong et al 2014). The aedeagal tube and sac of the new species is similar to that of N. maolanensis Yang & Yang, 1993, however in that species, the aedeagal tube is less sclerotized dorsally (see Fig. 2 in Yang & Yang 1993). In addition, the aedeagal sac of N. maolanensis lacks the double ear-shaped apical membranous lobes characteristic of the new species. Both species bear similar large spines near the sac apex, but in N. jiangsuensis the number of large spines are fewer and the spines along the sac are dorsolateral.
description: Published as part of Chen, Zhi-Teng & Du, Yu-Zhou, 2015, The first record of a species of Perlidae from Jiangsu Province, China: a new species of Neoperla (Plecoptera: Perlidae), pp. 424-430 in Zootaxa 3974 (3) on pages 424-427, DOI: 10.11646/zootaxa.3974.3.9, http://zenodo.org/record/234947
Removal of singularities from the covariant spectator theory
Creators: name: Gross, Franz
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: A modification of the one boson exchange (OBE) kernel for the covariant spectator theory (CST) is presented and discussed. When applied to the scattering of two identical particles, the previously used kernels either introduced spurious singularities, or removed them in an ad-hoc way. The new modification not only removes these singularities, but also maintains the convergence of the two-body CST equation (sometimes called the Gross equation) when used to describe the scattering of two identical scalar particles.
description: 21 pages; 17 figures (many with two panels)
An study of the host galaxy stellar populations with the SDSS-V (IV)
Creators: name: Ibarra-Medel, Hector Javier
Publisher: name: Zenodo
Year: 2024

description: We will introduce a new set of methodologies for decomposing AGN-Host spectra and studying the stellar populations of host galaxies (HG) using the forthcoming SDSS-V DR-19 data release. Our analysis will assess the feasibility of recovering stellar masses, star formation rates, ages, synthetic colours, and other properties for AGN-hosting galaxies observed during the SDSS-V. To achieve this goal, we will utilize optical spectra within a redshift range of 0.1 to 0.8 and employ a set of stellar population synthesis models to separate the non-thermal component of the active nucleus from that of the host galaxy using STARLIGHT and PyQSOFIT. This work will produce data products, including stellar masses, star formation rates, star formation histories, and emissions-free from the influence of the active nucleus.
Are Superhumps Good Measures of the Mass Ratio for AM CVn Systems?
Creators: name: Pearson, K. J.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We extend recent work that included the effect of pressure forces to derive the precession rate of eccentric accretion discs in cataclysmic variables to the case of double degenerate systems. We find that the logical scaling of the pressure force in such systems results in predictions of unrealistically high primary masses. Using the prototype AM CVn as a calibrator for the magnitude of the effect, we find that there is no scaling that applies consistently to all the systems in the class. We discuss the reasons for the lack of a superhump period to mass ratio relationship analogous to that known for SU UMa systems and suggest that this is because these secondaries do not have a single valued mass-radius relationship. We highlight the unreliability of mass-ratios derived by applying the SU UMa expression to the AM CVn binaries.
description: 7 pages, 2 tables, to appear in Monthly Notices of the Royal Astronomical Society
An Adaptive Clustering Approach for Accident Prediction
Creators: name: Dadwal, Rajjat
name: Funke, Thorben
name: Demidova, Elena
Publisher: name: arXiv
Year: 2021
Subjects: subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Traffic accident prediction is a crucial task in the mobility domain. State-of-the-art accident prediction approaches are based on static and uniform grid-based geospatial aggregations, limiting their capability for fine-grained predictions. This property becomes particularly problematic in more complex regions such as city centers. In such regions, a grid cell can contain subregions with different properties; furthermore, an actual accident-prone region can be split across grid cells arbitrarily. This paper proposes Adaptive Clustering Accident Prediction (ACAP) - a novel accident prediction method based on a grid growing algorithm. ACAP applies adaptive clustering to the observed geospatial accident distribution and performs embeddings of temporal, accident-related, and regional features to increase prediction accuracy. We demonstrate the effectiveness of the proposed ACAP method using open real-world accident datasets from three cities in Germany. We demonstrate that ACAP improves the accident prediction performance for complex regions by 2-3 percent points in F1-score by adapting the geospatial aggregation to the distribution of the underlying spatio-temporal events. Our grid growing approach outperforms the clustering-based baselines by four percent points in terms of F1-score on average.
description: 7 pages, 4 figures
D6.2 Project Dissemination Report v2
Creators: name: Cimiano, Philipp
Publisher: name: Zenodo
Year: 2021

description: This document represents the 2nd version of the report on dissemination activities carried out until month 24 of the Prêt-à-LLOD project.
 The primary goal of dissemination is twofold: promoting the project’s pilots and services, and identifying actions to promote their further exploitation. The second goal is to disseminate the work done by the scientific partners in the corresponding relevant scientific communities. Overall, dissemination of the project aims at ensuring an efficient and effective set of activities to maximise impact and awareness of the project among the research community, standardisation bodies, industrial key stakeholders, public authorities, policy-makers, entrepreneurial and investors ecosystem, and also a close collaboration with the European Language Grid, and cooperation mechanisms with the other actions and other relevant language technology (LT) projects, initiatives and networks. In this document we detail the industrial and scientific dissemination activities of Prêt-à-LLOD - both those already conducted and those planned for the future
Singular and regular vortices on top of a background pulled to the center
Creators: name: Chen, Zhaopin
name: Malomed, Boris A.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Pattern Formation and Solitons (nlin.PS)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: A recent analysis has revealed singular but physically relevant 2D localized vortex states with density ~ 1/r^{4/3} at r --> 0 and a convergent total norm, which are maintained by the interplay of the potential of the attraction to the center, ~ -1/r^2, and a self-repulsive quartic nonlinearity, produced by the Lee-Huang-Yang correction to the mean-field dynamics of Bose-Einstein condensates. In optics, a similar setting, with the density singularity ~ 1/r, is realized with the help of quintic self-defocusing. Here we present physically relevant antidark singular-vortex states in these systems, existing on top of a flat background. Numerical solutions for them are very accurately approximated by the Thomas-Fermi wave function. Their stability exactly obeys an analytical criterion derived for small perturbations. It is demonstrated that the singular vortices can be excited by the input in the form of ordinary nonsingular vortices, hence the singular modes can be created in the experiment. We also consider regular (dark) vortices maintained by the flat background, under the action of the repulsive central potential ~ +1/r^2. The dark modes with vorticities l = 0 and l = 1 are completely stable. In the case when the central potential is attractive, but the effective one, which includes the centrifugal term, is repulsive, and a weak trapping potential ~ r^2 is added, dark vortices with l = 1 feature an intricate pattern of alternating stability and instability regions. Under the action of the instability, states with l = 1 travel along tangled trajectories, which stay in a finite area defined by the trap. The analysis is also reported for dark vortices with l = 2, which feature a complex structure of alternating intervals of stability and instability against splitting. Lastly, simple but novel flat vortices are found at the border between the anidark and dark ones.
description: to be published in Journal of Optics (special issue on "Singular Optics")
Additional file 4 of Neonatal and child mortality data in retrospective population-based surveys compared with prospective demographic surveillance: EN-INDEPTH study
Creators: name: Tryphena Nareeba
name: Dzabeng, Francis
name: Alam, Nurul
name: Gashaw A. Biks
name: Thysen, Sanne M.
name: Akuze, Joseph
name: Blencowe, Hannah
name: Stephane Helleringer
name: Lawn, Joy E.
name: Kaiser Mahmud
name: Temesgen Azemeraw Yitayew
name: Fisker, Ane B.
Publisher: name: figshare
Year: 2021
Subjects: subject: Medicine
subject: Biotechnology
subject: Sociology
subject: FOS: Sociology
subject: Immunology
subject: FOS: Clinical medicine
subject: Cancer
subject: Science Policy

description: Additional file 4. Ethical approval of local Institutional Review Boards.
The continuous downgrading of malnutrition in the German DRG system: possible effects on the treatment of patients at risk for malnutrition
Creators: name: Stollhof, Laura E.
name: Braun, Jessica M.
name: Ihle, Christoph
name: Schreiner, Anna J.
name: Kufeldt, Johannes
name: Adolph, Michael
name: Wintermeyer, Elke
name: Stöckle, Ulrich
name: Nüssler, Andreas
Publisher: name: IfADo - Leibniz Research Centre for Working Environment and Human Factors, Dortmund
Year: 2019
Subjects: malnutrition
G-DRG
activity reimbursement
NRS

description: It has been internationally recognized that malnutrition is an independent risk factor for patients' clinical outcome. A new mandatory fixed price payment system based on diagnosis-related groups (G-DRG) went into effect in 2004. The aim of our study was to demonstrate the importance of carefully coding the secondary diagnosis of "malnutrition" in the G-DRG system and to highlight how the economic relevance of malnutrition in the G-DRG system has changed from 2014 to 2016. 1372 inpatients at the Berufsgenossenschaftliche Unfallklinik (Trauma Center) in Tübingen were screened for the risk of malnutrition using Nutritional Risk Screening (NRS-2002). Patient data were compared with the NRS values collected during the study and a case simulation was carried out separately for each year. We used the codes E44.0 for NRS = 3 and E43.0 for NRS > 3. The ICD codes were entered as an additional secondary diagnosis in the internal hospital accounting system DIACOS to determine possible changes in the effective weight. In 2014 the highest additional revenue by far was calculated by coding malnutrition. For the 638 patients enrolled in the study in 2014, we were able to calculate an average additional revenue per patient coded with malnourishment of €107. In 2016, we were unable to calculate any additional revenue for the 149 patients enrolled. Although it is well known that malnutrition is an independent risk factor for poor patient outcomes, nationwide screening for a risk of malnutrition when patients are admitted to a hospital is still not required. For this reason, malnutrition in German hospitals continues to be insufficiently documented. Due to the continuous downgrading of diagnosis-related severity (CCL) of malnutrition in the G-DRG system in trauma surgery patients, it is no longer possible to refinance the costs incurred by malnourished patients through the conscientious coding of malnutrition.  We assume that the indirect positive effects of nutritional interventions will have to be taken into account more in the costing calculations and possibly lead to indirect cost compensation.
description: EXCLI Journal; 18:Doc370; ISSN 1611-2156
Noise propagation in quantitative positron emission tomography
Creators: name: Palmer, Matthew Rex
Publisher: name: University of British Columbia
Year: 2010

description: Image noise in Positron Emission Tomography (PET) is the result of statistical fluctuation in projection data. The variance properties of images obtained with the UBC/TRIUMF PETT VI tomograph are studied by analytical methods, computer simulations, and phantom experiments. The PETT VI image reconstruction algorithm is described and analyzed for noise propagation properties. Procedures for estimating both point-wise (pixel) and region of interest (ROI) variances are developed: these include the effects of corrections for non-uniform sampling, detector efficiency variation, object self-attenuation and random coincidences. The analytical expression for image-plane variance is used in computer simulations to isolate the effects of the various data corrections: It is shown that the image precision is degraded due to non-uniform sampling of the projections. The RMS noise is found to be increased by 9% due to the wobble motion employed in PETT VI. Analytical predictions for both pixel and ROI variances are verified with phantom experiments. The average error between measured and predicted ROI variances due to noise in emission data for a set of seven regions placed on a 20 cm cylindrical phantom is 9.5%. Images showing variance distributions due to noise in emission data and due to noise in transmission data are produced from human subject brain scan data collected by the UBC/TRIUMF PET group. The maximum ratio of image variance due to noise in transmission data to that due to noise in emission data is calculated as 2.6 for a typical FDG study, and 0.082 for a typical fluorodopa study. Total RMS noise varies between 0.4% and 11.6% for a typical set of ROI's placed on mid-brain slices reconstructed from these data sets. Procedures are suggested for improving the statistical accuracy of quantitative PET measurements.
Magnetic fluctuations and itinerant ferromagnetism in two-dimensional systems with van Hove singularities
Creators: name: Igoshev, P. A.
name: Katanin, A. A.
name: Irkhin, V. Yu.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We use the quasistatic approach to analyze the criterion of ferromagnetism for two-dimensional (2D) systems with the Fermi level near Van Hove singularities (VHS) of the electronic spectrum. It is shown that the spectrum of spin excitations (paramagnons) is positively defined when the interaction I between electrons and paramagnons, which corresponds to the Hubbard on-site repulsion U, is sufficiently large. The critical interactions I_c and U_c remain finite at Van Hove filling and exceed considerably their values obtained from the Stoner criterion due to incommensurate spin fluctuations which are important near the ferromagnetic quantum phase transition. Combining the quasistatic approximation and the equation-of -motion method for the Green functions we obtain the results for the electronic self-energy to first order in the inverse number of spin components.
description: This is an extended version of the paper in Sov. Phys. JETP, misprints are corrected
Joint Temporal Density Measurements for Two-Photon State Characterization
Creators: name: Kuzucu, Onur
name: Wong, Franco N. C.
name: Kurimura, Sunao
name: Tovstonog, Sergey
Publisher: name: arXiv
Year: 2008
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We demonstrate a new technique for characterizing two-photon quantum states based on joint temporal correlation measurements using time resolved single photon detection by femtosecond upconversion. We measure for the first time the joint temporal density of a two-photon entangled state, showing clearly the time anti-correlation of the coincident-frequency entangled photon pair generated by ultrafast spontaneous parametric down-conversion under extended phase-matching conditions. The new technique enables us to manipulate the frequency entanglement by varying the down-conversion pump bandwidth to produce a nearly unentangled two-photon state that is expected to yield a heralded single-photon state with a purity of 0.88. The time-domain correlation technique complements existing frequency-domain measurement methods for a more complete characterization of photonic entanglement in quantum information processing.
description: 4 pages, 5 figures
D6.8 Project Communication Report v2
Creators: name: Thurner, Thomas
name: Cooney, Katharine
Publisher: name: Zenodo
Year: 2021

description: Beyond the contribution to the expected impacts listed in the work programme, it is crucial to have the greatest impact on key stakeholders outside the project partnership, to ensure that the vision, objectives, activities and results of Prêt-à-LLOD become as widely known and as well understood as possible.
 This report is the second review of the actions taken in this respect. While the project developed well in the outreach to the scientific community the take-up and communication towards the LT industry still needs improvement. The pandemic prevented face-to-face
 communication, and event participation and an overall situation where innovations are harder to communicate. In addition to this a major problem with the website (attacks) also caused problems in reaching out to the interested public.
 So the remaining project life time has to be used to compensate this deficit and build up a solid reputation for the project in the public. We have met this challenge by the development of new communication methods such as webinars and online events
New target transverse spin dependent azimuthal asymmetries from COMPASS experiment
Creators: name: Parsamyan, Bakur
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: In general, eight target transverse spin-dependent azimuthal modulations are allowed in semi inclusive deep inelastic scattering of polarized leptons on a transversely polarized target. In the QCD parton model four of these asymmetries can be interpreted within the leading order approach. Two of them, namely Collins and Sivers effects were already measured by HERMES and COMPASS experiments. Other two leading twist and remaining four azimuthal asymmetries which can be interpreted as twist-three contributions have been measured for the first time in COMPASS using a 160 GeV/c longitudinally polarized ($P_{beam}\simeq -0.8$) muon beam and a transversely polarized $^6LiD$ target. We present here the preliminary results from the 2002-2004 data.
description: 4 pages, 8 figures, talk delivered at conference: "SYMMETRIES AND SPIN (SPIN-Praha-2007)" Prague, July 8 - July 14, 2007
An arithmetic processor for robotics
Creators: name: Poon, Joseph Kin-Shing
Publisher: name: University of British Columbia
Year: 2010

description: An arithmetic processor chip for use in robotics has been designed in 4µm CMOS technology. The chip is intended to function as a slave processor to a general purpose microprocessor host and be able to perform robot arm coordinate transformation calculations for use in real-time control applications. A parallel-processing, multi-pipelined architecture has been used to produce a 45mm² chip for which a machine cycle time of 200ns appears possible. The general nature of the architecture of this microprogrammable processor renders it useful for a range of computational tasks in robotics in addition to coordinate transformation.
Switchable Magnetic Frustration in Buckyball Nanoarchitectures
Creators: name: Cheenikundil, Rajgowrav
name: Hertel, Riccardo
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Recent progress in nanofabrication has led to the emergence of three-dimensional magnetic nanostructures as a vibrant field of research. This includes the study of three-dimensional arrays of interconnected magnetic nanowires with tunable artificial spin-ice properties. Prominent examples of such structures are magnetic buckyball nanoarchitectures, which consist of ferromagnetic nanowires connected at vertex positions corresponding to those of a C60 molecule. These structures can be regarded as prototypes for the study of the transition from two- to three-dimensional spin-ice lattices. In spite of their significance for three-dimensional nanomagnetism, little is known about the micromagnetic properties of buckyball nanostructures. By means of finite-element micromagnetic simulations, we investigate the magnetization structures and the hysteretic properties of several sub-micron-sized magnetic buckyballs. Similar to ordinary artificial spin ice lattices, the array can be magnetized in a variety of zero-field states with vertices exhibiting different degrees of magnetic frustration. Remarkably, and unlike planar geometries, magnetically frustrated states can be reversibly created and dissolved by applying an external magnetic field. This easiness to insert and remove defect-like magnetic charges, made possible by the angle-selectivity of the field-induced switching of individual nanowires, demonstrates a potentially significant advantage of three-dimensional nanomagnetism compared to planar geometries. The control provided by the ability to switch between ice-rule obeying and magnetically frustrated structures could be an important feature of future applications, including magnonic devices exploiting differences in the fundamental frequencies of these configurations.
description: 5 pages, 5 figures The following article has been accepted by Applied Physics Letters. After it is published, it will be found at http://apl.aip.org/
Les clusters verts pour l'innovation responsable : comment contribuent-ils à un management anticipatif, réflexif, inclusif et réactif de l'innovation ?
Creators: name: NASSIKI, Mohamed
name: KOURAICH, Loubna
Publisher: name: Zenodo
Year: 2023
Subjects: Innovation responsable ; Clusters verts ; collaboration ; management responsable ; grands challenges.

description: La littérature récente sur l’innovation responsable (IR) souligne un certain nombre de difficultés susceptibles d’entraver l’applicabilité pratique de ce concept. Notre recherche vise à contribuer au débat en cours concernant la gouvernance de l’IR dans le monde réel. Pour ce faire nous explorons les potentiels contributions des clusters verts en termes de pratiques d’innovation et de management qui peuvent aider à implémenter et mobiliser l’innovation responsable dans le contexte industriel. Sur la base d’une étude qualitative exploratoire menée auprès de deux clusters verts, les résultats montrent que les caractéristiques structurelles et relationnelles des clusters facilitent la mise en pratique des principes de management responsable de l’innovation sous les quatre facettes : l’anticipation, la réflexivité, l’inclusion et la réactivité. De surcroit, cette étude révèle que ces structures permettent de conjurer certaines limites qui rendent fragile le concept de l’IR.
Large-Sample Confidence Intervals for the Treatment Difference in a Two-Period Crossover Trial, Utilizing Prior Information
Creators: name: Kabaila, Paul
name: Giri, Khageswor
Publisher: name: arXiv
Year: 2008
Subjects: subject: Methodology (stat.ME)
subject: Statistics Theory (math.ST)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics

description: Consider a two-treatment, two-period crossover trial, with responses that are continuous random variables. We find a large-sample frequentist 1-alpha confidence interval for the treatment difference that utilizes the uncertain prior information that there is no differential carryover effect.
description: This version is the same as v1. This paper has been accepted for publication in Statistics and Probability Letters
The active centaur 2020 MK4
Creators: name: Marcos, C. de la Fuente
name: Marcos, R. de la Fuente
name: Licandro, J.
name: Serra-Ricart, M.
name: Martino, S.
name: de Leon, J.
name: Chaudry, F.
name: Alarcon, M. R.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Context. Centaurs go around the Sun between the orbits of Jupiter and Neptune. Only a fraction of the known centaurs have been found to display comet-like features. Comet 29P/Schwassmann-Wachmann 1 is the most remarkable active centaur. It orbits the Sun just beyond Jupiter in a nearly circular path. Only a handful of known objects follow similar trajectories. Aims. We present photometric observations of 2020 MK4, a recently found centaur with an orbit not too different from that of 29P, and we perform a preliminary exploration of its dynamical evolution. Methods. We analyzed broadband Cousins R and Sloan g', r', and i' images of 2020 MK4 acquired with the Jacobus Kapteyn Telescope and the IAC80 telescope to search for cometary-like activity, and to derive its surface colors and size. Its orbital evolution was studied using direct N-body simulations. Results. Centaur 2020 MK4 is neutral-gray in color and has a faint, compact cometary-like coma. The values of its color indexes, (g'-r')=0.42+/-0.04 and (r'-i')=0.17+/-0.04, are similar to the solar ones. A lower limit for the absolute magnitude of the nucleus is Hg=11.30+/-0.03 mag which, for an albedo in the range of 0.1-0.04, gives an upper limit for its size in the interval (23, 37) km. Its orbital evolution is very chaotic and 2020 MK4 may be ejected from the Solar System during the next 200 kyr. Comet 29P experienced relatively close flybys with 2020 MK4 in the past, sometimes when they were temporary Jovian satellites. Conclusions. We confirm the presence of a coma of material around a central nucleus. Its surface colors place this centaur among the most extreme members of the gray group. Although its past, present, and future dynamical evolution resembles that of 29P, more data are required to confirm or reject a possible connection between the two objects and perhaps others.
description: 15 pages, 15 figures, 6 tables, 3 appendixes. Accepted for publication in Astronomy and Astrophysics. Abstract abridged. After A&A language editing
Shadowless rapidly rotating yet not ultraspinning Kerr-AdS$_4$ and Kerr-Newman-AdS$_4$ black holes
Creators: name: Wu, Di
name: Wu, Puxun
name: Yu, Hongwei
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We find that the Kerr-(Newman)-AdS$_4$ black hole will be shadowless if its rotation parameter is larger than a critical value and the shadowless-ness may be related to the appearance of the null hypersurface caustics (NHC) both inside the Cauchy horizon and outside the event horizon for the black hole with the rotation parameter beyond the critical value. Our studies also further confirm that whether an ultraspinning black hole is super-entropic or not is unrelated to the existence of the NHC outside the event horizon.
description: 5 pages, 4 figures. arXiv admin note: substantial text overlap with arXiv:2104.10476
Drevna DNK analiza individua sahranjenih na ranobronzanoposkoj nekropoli u Mokrinu (2100-1800. godina pre nove ere)
Creators: name: Žegarac, Aleksandra
name: Krečković, Marija
Publisher: name: Zenodo
Year: 2019
Subjects: Ancient DNA
kinship studies
Early Bronze Age
Maros culture

description: Analize drevne DNК od izuzetnog su značaja za arheološka istraživanja, jer mogu pružiti odgovore na širok spektar pitanja, a jedno od njih je utvrđivanje porodičnih veza među individuama koje istražujemo. Sekvenciranje drevne DNК 24 individue sahranjene na ranobronzanodopskoj nekropoli u Mokrinu (2100–1800. godina pre nove ere) omogućilo je utvrđivanje biološkog srodstva čak i do trećeg kolena. Time ne samo da je omogućeno sagledavanje roditeljskih i daljih rodbinskih veza već i razmatranje pogrebne prakse u svetlu ovih podataka. Dvojni i trojni grobovi izuzetno su retki i odskaču od uobičajenog funerarnog rituala u moriškoj kulturi. Кako bi se odgovorilo na pitanje o uzrocima koji su doveli do zajedničke sahrane u jednom od dvojnih grobova, grobu 257, urađene su analize drevne DNК starije žene i deteta sahranjenih u ovom grobu, kao i kompletna antropološka analiza skeleta i arheološka analiza grobnih priloga, položaja i orijentacije u grobu. Rezultati su pokazali da su žena i dečak u drugom stepenu srodstva, tj. da se najverovatnije radi o baki i unuku. Ovaj rezultat ukazuje na to da je srodnička veza imala značajnu ulogu u formiranju zajedničkog groba. Da je pogrebna praksa na Mokrinu bila u određenoj meri povezana sa srodstvom pokazuje i rezultat analize drevne DNК muškarca sahranjenog u obližnjem grobu 243 koji je u najbližoj porodičnoj vezi sa individuama sahranjenim u grobu 257. Ovakva potvrda postojanja srodničkih veza među pokojnicima koji su sahranjeni u neposrednoj blizini od izuzetnog je značaja za razumevanje pogrebnog rituala na Mokrinu.
Onset of phase correlations in YBa2Cu3O{7-x} as determined from reversible magnetization measurements
Creators: name: Salem-Sugui,, S.
name: Alvarenga, A. D.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Isofield magnetization curves are obtained and analyzed for three single crystals of YBa2Cu3O{7-x}, ranging from optimally doped to very underdoped, as well as the BCS superconductor Nb, in the presence of magnetic fields applied both parallel and perpendicular to the $ab$ planes. Near Tc, the magnetization exhibits a temperature dependence \sqrt{M} [Ta(H)-T]^m. In accordance with recent theories, we associated Ta(H) with the onset of coherent phase fluctuations of the superconducting order parameter. For Nb and optimally doped YBaCuO, Ta(H) is essentially identical to the mean-field transition line Tc(H). The fitting exponent m=0.5 takes its mean-field value for Nb, and varies just slightly from 0.5 for optimally doped YBaCuO. However, underdoped YBCO samples exhibit anomalous behavior, with Ta(H)>Tc for H applied parallel to the c axis, suggesting that the magnetization is probing a region of temperatures above Tc where phase correlations persist. In this region, the fitting exponent falls in the range 0.5 < m < 0.8 for H\parallel c, compared with m~0. for $H\parallel ab planes. The results are interpreted in terms of an anisotropic pairing symmetry of the order parameter: d-wave along the ab planes and s-wave along the c axis.
description: 5 pages, 4 figures
DSR and Canonical Transformations: A Comment on a ``A Lagrangian for DSR particle and the role of noncommutativity''
Creators: name: Garcia, J. Antonio
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: The aim of this comment is to call to the attention of DSR readers a basic fact. The introduction of noncommutative structures in problems like the one addressed in [1] is not necessary for the understanding of DSR physics. It can be described just as the relativistic free particle problem in a different parametrization.
description: 3 pages. Accepted in PRD. v2 Fixed typos, reference added, version for PRD
Measure of a 2-component link
Creators: name: O'Hara, Jun
Publisher: name: arXiv
Year: 2007
Subjects: subject: Geometric Topology (math.GT)
subject: FOS: Mathematics
subject: 57M25, 53A30

description: A two-component link produces a torus as the product of the component knots in a two-point configuration space of a three-sphere. This space can be identified with a cotangent bundle and also with an indefinite Grassmannian. We show that the integration of the absolute value of the canonical symplectic form is equal to the area of the torus with respect to the pseudo-Riemannian structure, and that it attains the minimum only at the "best" Hopf links.
description: to appear in Tohoku Math. J
Ionic environment control of visible photo-luminescence from ZnO nanoparticles
Creators: name: Ghosh, Manoranjan
name: Raychaudhuri, A. K.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We report a novel effect that the visible photoluminescence (in the blue-green band) from ZnO anoparticles can be controlled by changing the ionic or polar nature of the medium in which the nanoparticles are dispersed. We find that the presence of sufficient amount of electrolytes can even quench the emission. We propose an explanation based on surface charge of the ZnO nanoparticles which control the band bending in the depletion layer at the surface of the anoparticles. The band bending in turn, decides the predominant nature of the visible emission. The explanation is validated by establishing a direct correlation between the visible emission and the zeta potential.
description: 3 pages including 4 figures
title: Laser-driven metal alteration for glucose detection sensor
Creators: name: Kondrateva, A.
name: Babyuk, V.
name: Strekalovskaya, D.
name: Filatov, L.
name: Gabdullin, P.
name: Kvashenkina, O.
name: Prokopenko, Y.
name: Gruzdev,  A.
name:  Petruhno, K.
name: Kuznetsov, A.
Publisher: name: Peter the Great St. Petersburg Polytechnic University
Year: 2021

description: In this work, an experimental comparison of the laser-driven alteration of nickel, copper, and steel surface efficiency was carried out. The selection of the material most suitable for non-enzymatic measurement of the glucose amount in the medium was carried with respect to surface modification efficiency. The electrooxidative activity of the fabricated structures with a modified surface was investigated with respect to the glucose addition to a 0.1 M solution NaOH by potentiostatic method. The modified active NiO layer allows us the amperometric determination of glucose in the concentration range from 10 µM to 1.5 mM with sensitivity is higher than 10 µA/(mM·cm2) and the detection limit is not less than 5 µM. The proposed technology allows the manufacture of electrodes for non-enzymatic determination of glucose in alkaline solutions.
Dynamics of the triple contact line on a non-isothermal heater at partial wetting
Creators: name: Nikolayev, Vadim S.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: The dynamics of the triple gas-liquid-solid contact line is analysed for the case where the gas is the saturated vapour corresponding to the liquid, like in the vapour bubble in boiling. It is shown that even small superheating (with respect to the saturation temperature) causes evaporation of the adsorption liquid film and the true triple contact is established. It is shown that the hydrodynamic contact line singularity cannot be relaxed with the Navier slip condition under such circumstances. Augmented with the second derivative slip condition is proposed to be applied. For the partial wetting conditions, a non-stationary contact line problem where the contact line motion is caused by evaporation or condensation is treated in the lubrication approximation in the vicinity of the contact line. High heat fluxes in this region require the transient heat conduction inside the heater to be accounted for. Two 2D problems, those of drop retraction with no phase change and of drop evaporation are solved and analysed as illustrations of the proposed approach.
Pseudorandom Number Generators and the Square Site Percolation Threshold
Creators: name: Lee, Michael J.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: A select collection of pseudorandom number generators is applied to a Monte Carlo study of the two dimensional square site percolation model. A generator suitable for high precision calculations is identified from an application specific test of randomness. After extended computation and analysis, an ostensibly reliable value of pc = 0.59274598(4) is obtained for the percolation threshold.
description: 11 pages, 6 figures
Curran, Georgia. 2020. Sustaining indigenous songs. Contemporary Warlpiri ceremonial life in Central Australia (Foreword by Otto Jungarrayi Sims). London, New York: Berghahn Books. 206 pp. Hb.: $120.00/£89.00. ISBN: 9781789206074.
Creators: name: Zotali, Paraskevi
Publisher: name: Zenodo
Year: 2023

description: Book review 

Curran, Georgia. 2020. Sustaining indigenous songs. Contemporary Warlpiri ceremonial life in Central Australia (Foreword by Otto Jungarrayi Sims). London, New York: Berghahn Books. 206 pp. Hb.: $120.00/£89.00. ISBN: 9781789206074.

by Paraskevi Zotali
title: Impact of an Online EdD Programme on Personal Development and Professional Practices
Creators: name: Lopez, J
Publisher: name: University of Liverpool Repository
Year: 2017

description: A professional doctorate in education degree (EdD) is a degree where students contextualize professional knowledge into a “theoretical academic framework” (Quality Assurance Agency, 2015, p. 8). This study’s context is a 100% online EdD programme in the United Kingdom (UK) comprised of students throughout the world. Because online EdD programmes are relatively new, limited knowledge exists about the online EdD phenomenon from the students’ perspectives. In effect, the student voice about the online EdD is nearly absent in the literature but should be considered. How to fulfil the primary aim of the programme, to interrelate theory and professional practice and evoke social change (Costley, 2014), also has received limited attention. Two main aims of this study are: (1) To investigate the impacts of the online EdD learning experiences and outcomes on the participants’ personal and professional development through a phenomenologically-informed lens; and (2) To advance the student voice about learning experiences in online EdD programmes. This thesis is phenomenologically-informed, which enabled an in-depth investigation and a “Textural-Structural Description” (Moustakas, 1994, p. 121). The methods to collect data were interviews and document collection, which offered response triangulation and further analysis. The study results indicated that the participants experienced emotional and social challenges (e.g., cultural and linguistic disconnections and incremental disorienting dilemmas) that the transnational higher education (TNHE) virtual learning environment (VLE) sometimes exacerbated. Five of the eight participants’ stories contained evidence of each transformative learning stage (explored further in section 4.6) (Mezirow, 1991). The majority of the participants applied new knowledge from the online EdD programme to their professional contexts to effectuate social change, which is discussed in Chapters IV-V. This study draws attention to the online EdD phenomenon and furthers the discourse about the impacts of the online EdD on students’ personal and professional development. Key words: professional doctorate in education (EdD); phenomenologically-informed; transformative learning; student voice
Analysis of three-body charmed B meson decays under the factorization-assisted topological-amplitude approach
Creators: name: Zhou, Si-Hong
name: Li, Run-Hui
name: Wei, Zheng-Yi
name: u, Cai-Dian L\"
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We analyze the quasi-two-body charmed $B$ decays $B^{+,0}_{(s)} \to D_{(s)}^* P_2 \to D_{(s)} P_1 P_2$ with $P_{1,2}$ as a pion or kaon. The intermediate processes $B_{(s)} \to D_{(s)}^* P_2 $ are calculated with the factorization-assisted topological-amplitude approach and the resonant effects are calculated with the Breit-Wigner formalism. Taking all p-wave resonance states $ \bar D_{(s)}^*$ into consideration, we present the related branching fractions, calculate the Breit-Wigner-Tail effects, and investigate the flavor $SU(3)$ breaking effects. Most of our branching fractions are consistent with the perturbative QCD approach's predictions as well as the current experimental data. With more precision calculation of the intermediate two body charmed B meson decays, our quasi-two-body B decays calculation has significantly less theoretical uncertainty than the perturbative QCD approach. Many of those channels without any experimental data will be confronted with the future more accurate experiment measurements. Our results of the Breit-Wigner-tail effects also agree with the experimental very well. In $B^0$ decays this effect can reach approximately to $5\%$. It is also found that the Breit-Wigner-tail effects are not sensitive to the widths of their corresponding resonances. The flavor $SU(3)$ symmetry breaking effect is also investigated.
description: 22 pages, 3 figures, 5 tables
title: Engaging with learning opportunities for positive outcomes: A study of post-secondary learners’ experiences in a rural college setting
Creators: name: Wainwright-Stewart, AE
Publisher: name: University of Liverpool Repository
Year: 2018

description: Abstract The purpose of this study was to develop a better understanding of students’ post-secondary lived experiences at a rural college in Canada. My primary question was: How do students, who have engaged with the learning opportunities at Prairie Site College, make sense of being engaged in these experiences? The theoretical framework of appreciative inquiry (AI) was applied using the methodology of interpretative phenomenological analysis (IPA) to address the research question. Ten graduating students at a rural college in Canada took part in the study. To collect data the visual research technique of photo-elicitation and semi-structured interviews were implemented. The study found that positive learning experiences include two key aspects that contribute to learner success: belongingness and authentic learning activities promote student engagement. Students that feel connected to their learning environment are more compelled to seek out new learning activities. Learners who experience practical, real-world activities understand concepts better. The outcome of combining belongingness and authentic learning promotes transformational learning thus providing learners with confidence to learn, grow, and develop positive self-esteem as well as experience transformational life changes. The implications for professional practice in supporting positive learning in post-secondary learners include creating an atmosphere of belongingness where learners feel cared about, find connections and experience trust. Building an authentic learning environment incorporates support for learners and provides for engagement with others in real-world activities. Learners who experience this combination should experience personal change.