cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Quantum shells in a quantum space-time
Creators: name: Gambini, Rodolfo
name: Pullin, Jorge
Publisher: name: arXiv
Year: 2014
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study the quantum motion of null shells in the quantum space-time of a black hole in loop quantum gravity. We treat the shells as test fields and use an effective dynamics for the propagation equations. The shells propagate through the region where the singularity was present in the classical black hole space-time, but is absent in the quantum space-time, eventually emerging through a white hole to a new asymptotic region of the quantum space-time. The profiles of the shells get distorted due to the quantum fluctuations in the Planckian region that replaces the singularity. The evolution of the shells is unitary throughout the whole process.
description: 5 pages, 3 figures
title: La vie d’un bouc émissaire
title: de l’impuissance à la guérison
titleType: Subtitle
Creators: name: Ingargiola, Joël
Publisher: name: Unknown
Year: 0
Subjects: subject: mobbing
subject: bouc émissaire
subject: persécution
subject: harcèlement
subject: violence
subject: résilience

description: Le présent travail de mémoire représente l’aboutissement de près d’une année de recherches et de rédaction, menées conjointement à l’exercice concret du métier d’enseignant. Interrogé par les situations d’élèves rencontrés, persécutés au sein de leurs groupes, ainsi que par mon propre parcours d’enfant bouc émissaire, j’ai choisi d’entrer dans le sujet de recherche par le biais de mon récit de vie, persuadé que la dynamique du mobbing n’est pas une fatalité et qu’elle est compréhensible malgré la particularité de chaque cas. J’ai formulé l’hypothèse que, quels que soient les masques qu’il porte, ce phénomène a des pierres angulaires systématiquement identifiables. Mon hypothèse est assortie du postulat que tout ce qui peut être compris peut être, au besoin, mieux combattu. Les auteurs de la littérature consultée convergent vers des idées fortes et similaires. Rejetant le déterminisme comme la passivité ou l’abdication des enseignants, ils invitent à l’action réfléchie, à l’empathie et à la mise au travail de tous les acteurs des dynamiques de mobbing. Ils replacent dans les mains des détenteurs de l’autorité la responsabilité du cadre dans lequel les élèves sont amenés à cohabiter. Ce travail incombe non seulement au groupe professionnel entourant les élèves, avec ses différents corps de métiers, mais également aux parents de l’enfant victime des violences de ses camarades et, dans une certaine mesure, à l’enfant lui-même. Alors s’engagent les tâches ardues mais néanmoins nécessaires d’analyse de situation, et, avec le groupe concerné, de remédiation. Notamment, les auteurs arrivent au consensus qui veut que l’initiation d’un dialogue entre les acteurs d’une situation de mobbing et la sensibilisation aux problèmes que posent la violence et la persécution sont des voies préférables à la répression ou la culpabilisation publique des bourreaux. En effet, ces derniers sont à accepter dans la problématique comme, eux aussi, des enfants en besoin.
description: Mémoire professionnel, Bachelor of arts en enseignement pour les degrés préscolaire et primaire
General analysis of the ARPES line shape for strongly correlated electron systems
Creators: name: Ovchinnikov, S. G.
name: Shneyder, E. I.
name: Kordyuk, A. A.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: In many cases the standard perturbation approach appears to be too simple to describe precisely the angle resolved photoemission spectrum of strongly correlated electron system. In particular, to describe the momentum asymmetry observed in photoemission spectra of high-Tc cuprates a phenomenological approach based on extremely correlated Fermi-liquid model has been recently introduced. In this paper we analyze the general structure of the Green function of quasiparticles in strongly correlated electron systems and stress that it is defined not only by the self-energy of Hubbard quasiparticles but also by a strength operator. We show that the later leads to an additional odd momentum contribution to the spectral function and alone can explain the observed asymmetry. So, the asymmetry of the ARPES spectra can be a measure of the strength of electron correlations in materials.
description: 4 pages
Protocol Optimization of Growth Regulators for in Vitro Propagation of Moringa Oleifera L. From Nodal Explant
Creators: name: Goiteom Bugusa
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2021
Subjects: In vitro propagation, Mean, Moringa oleifera L., MS medium, nodal explant, Standard error

description: Moringa oleifera L. is a flowering tree which belongs to Moringaceae family within the genus of Moringa. This plant is a tropical plant and native to India, Pakistan and Bangladesh. It was introduced to Ethiopia before several years. It is now mostly found in the South part of Ethiopia. Traditionally Moringa were used as a natural medicine. Scientific evidences implicated that the plant can be used as nutrition source. The plant has high mineral content, vitamin and many essential amino acids. All part of the plant is edible except the woody portion. The plant can be propagated through vegetative propagation but, it has poor root system. The aim of this study was to develop efficient protocol for M. oleifera L. from nodal explant. Seeds were collected and germinated in green house. Nodal explant of M. oliefera was prepared and cultured in MS medium under different concentration of 6-Benzyle Amino Purine (BAP) and Kinetin (Kin). In vitro initiated shoots were transferred to MS media for shoot multiplication with different concentration of BAP in combination with Indol-3-Butyric Acid (IBA) and Kin in combination with Naphthalene Acetic Acid (NAA). Data were analyzed using SPSS software version 20; each means were compared at probability of (α = 0.05) and were presented as mean ± standard error. Maximum mean shoot number was recorded with 0.2 mg/l of IBA in combination with 1.0 mg/l of BAP. Maximum shoot length was observed from 0.5 mg/l of NAA in combination with 1 mg/l of kin. When the in vitro cultured shoots were subjected to different concentration of growth hormones of NAA, IBA and hormone free MS media, shows a significant difference in the root number and root lengths. Maximum mean number of roots and maximum mean length of roots were recorded with 0.2 mg/l of NAA. The protocol of this study can be used for mass propagation and to enhance the poor root system through in vitro propagation.
A statistical resolution measure of fluorescence microscopy with finite photons
Creators: name: Li, Yilun
name: Huang, Fang
Publisher: name: arXiv
Year: 2023
Subjects: subject: Optics (physics.optics)
subject: Applications (stat.AP)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: First discovered by Ernest Abbe in 1873, the resolution limit of a far-field microscope is considered determined by the numerical aperture and wavelength of light, approximately $λ$/2NA. With the advent of modern fluorescence microscopy and nanoscopy methods over the last century, it is recognized that Abbe's resolution definition alone could not solely characterize the resolving power of the microscope system. To determine the practical resolution of a fluorescence microscope, photon noise remains one essential factor yet to be incorporated in a statistics-based theoretical framework. Techniques such as confocal allow trading photon noise in gaining its resolution limit, which may increase or worsen the resolvability towards fluorescently tagged targets. Proposed as a theoretical measure of fluorescence microscopes' resolving power with finite photons, we quantify the resolvability of periodic structures in fluorescence microscopy systems considering both the diffraction limit and photon statistics. Using the Cramer-Rao Lower Bound of a parametric target, the resulting precision lower bound establishes a practical measure of the theoretical resolving power for various modern fluorescence microscopy methods in the presence of noise.
Robustness of Strong Stability of Discrete Semigroups
Creators: name: Paunonen, Lassi
Publisher: name: arXiv
Year: 2014
Subjects: subject: Functional Analysis (math.FA)
subject: FOS: Mathematics
subject: 47A55, 47D06, 93D20

description: In this paper we study the robustness of strong stability of a discrete semigroup on a Hilbert space under bounded finite rank perturbations. As the main result we characterize classes of perturbations preserving the strong stability of the semigroup.
description: 11 pages, 1 figure, submitted
Observer, évaluer et améliorer ma présence en classe
Creators: name: Tashi, Emirjeta
Publisher: name: Unknown
Year: 0
Subjects: subject: Observation
subject: auto-évaluation
subject: présence
subject: autorité
subject: regard
subject: exigences
subject: vidéo

description: Ce travail de mémoire est une observation-évaluation d’une pratique, autour d’une réflexion qui consiste à mettre en mots la présence en classe de l’enseignante. L’analyse des paramètres constitutifs du concept de « présence en classe » a permis une auto-évaluation, ainsi qu’une comparaison à partir de deux enregistrements vidéo, filmés à plusieurs mois d’intervalle, ainsi qu’un bilan de ladite présence. L’enjeu consiste à rendre explicite le concept de présence, en tant que qualité d’être qui permet à la personne de s’imposer. La réflexion part d’une situation problématique et engage un processus considérant les faits et les comportements observés, ainsi que des hypothèses de compréhension sur lesquelles sont envisagées des hypothèses d’action. Cette étude de cas, centrée sur la pratique de l’auteure a permis de mettre en lumière les faiblesses et les points forts de son enseignement, ainsi que des pistes de travail pour améliorer sa présence en classe.
description: Mémoire professionnel, Master en enseignement pour le degré secondaire I
A portable and high intensity 24 keV neutron source based on $^{124}$Sb-$^{9}$Be photoneutrons and an iron filter
Creators: name: Biekert, A.
name: Chang, C.
name: Chaplinsky, L.
name: Fink, C. W.
name: Frey, W. D.
name: Garcia-Sciveres, M.
name: Guo, W.
name: Hertel, S. A.
name: Li, X.
name: Lin, J.
name: Lisovenko, M.
name: Mahapatra, R.
name: McKinsey, D. N.
name: Mehrotra, S.
name: Mirabolfathi, N.
name: Patel, P. K.
name: Penning, B.
name: Pinckney, H. D.
name: Reed, M.
name: Romani, R. K.
name: Sadoulet, B.
name: Smith, R. J.
name: Sorensen, P.
name: Suerfu, B.
name: Suzuki, A.
name: Velan, V.
name: Wang, G.
name: Wang, Y.
name: Watkins, S. L.
name: Williams, M. R.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: A portable monoenergetic 24 keV neutron source based on the $^{124}$Sb-$^9$Be photoneutron reaction and an iron filter has been constructed and characterized. The coincidence of the neutron energy from SbBe and the low interaction cross-section with iron (mean free path up to 29 cm) makes pure iron specially suited to shield against gamma rays from $^{124}$Sb decays while letting through the neutrons. To increase the $^{124}$Sb activity and thus the neutron flux, a $>$1 GBq $^{124}$Sb source was produced by irradiating a natural Sb metal pellet with a high flux of thermal neutrons in a nuclear reactor. The design of the source shielding structure makes for easy transportation and deployment. A hydrogen gas proportional counter is used to characterize the neutrons emitted by the source and a NaI detector is used for gamma background characterization. At the exit opening of the neutron beam, the characterization determined the neutron flux in the energy range 20-25 keV to be 5.36$\pm$0.20 neutrons per cm$^2$ per second and the total gamma flux to be 213$\pm$6 gammas per cm$^2$ per second (numbers scaled to 1 GBq activity of the $^{124}$Sb source). A liquid scintillator detector is demonstrated to be sensitive to neutrons with incident kinetic energies from 8 to 17 keV, so it can be paired with the source as a backing detector for neutron scattering calibration experiments. This photoneutron source provides a good tool for in-situ low energy nuclear recoil calibration for dark matter experiments and coherent elastic neutrino-nucleus scattering experiments.
description: 11 pages, 20 figures
Excavation of the hillfort defences at Hunsbury, Northampton, in 1952 and 1988
Creators: name: Jackson, Dennis A
Publisher: name: Archaeology Data Service
Year: 2020

description: Northamptonshire Archaeology, 25, 5-20
description: This report describes the results of two excavations carried out at this hillfort: two cuttings made by Professor Alston in 1952, and a further investigation of an eroded section of the rampart in 1988. An early rampart was constructed from material dug from the encircling ditch, which varied around its circuit as reflected by the core of the rampart in the excavated sections. The 1988 excavations showed that sandstone dug from the ditch was incorporated into the rampart and perhaps formed the front revetment. The rampart at the rear was supported by a stockade of closely set posts; it is possible that this stockade was initially free-standing and that a box structure was added later. Evidence in the east cutting of 1952 suggested that the ditch was recut and the early box rampart superseded by one of glacis form. Similarly, the rampart in the 1988 cutting had almost certainly been reconstructed in some form after it was burnt. Both campaigns of excavation showed that a great deal of the rampart had been lost to quarrying and erosion, making it difficult to assess its form in the later period with any confidence. The east cutting was positioned next to the hillfort entrance, and it is possible that the remodelling revealed in the trench is confined to this area. Too much of the rampart on the north side of the hillfort has been destroyed to resolve this problem, although the 1988 excavation confirmed that more than one phase of construction is represented.
Reducing sugar Recovery from Water Hyacinth for Bioethanol Production & Parametric Optimization
Creators: name: Rakeb  Kifle
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2021
Subjects: Acid hydrolysis, Enzymatic hydrolysis, Reducing sugar, Water hyacinth,

description: The wide and fast invasion of water hyacinth on water bodies is a threat worldwide. The invasion, however, has not been possible to halt due to the fast growth of the weed. This call for a solution that could benefit the country and help preserve the water body. Even though water hyacinth has unmerciful ways of ruining aesthetic and physicochemical values of water bodies, it has a solution that is undeniably beneficial, especially in a developing country such as Ethiopia where fuel is very expensive. Water hyacinth has a good potential for biofuel production. During the present work, the water hyacinth was converted into bioethanol through two-step pretreatments, enzymatic hydrolysis and fermentation. The two-step pretreatments included liquid hot water pretreatment and dilute acid hydrolysis. The liquid hot water pretreatment was mainly for delignification but some amount of hemicellulose gets degraded as well. The dilute acid hydrolysis was optimized to get the best process condition that could break down the hemicellulose leaving the cellulose vulnerable for enzymatic hydrolysis. The parameters optimized were: dilute acid concentration, hydrolysis temperature and hydrolysis time. The optimum condition for dilute acid concentration was 1.5% (v/v), for hydrolysis temperature was 140⁰C and for hydrolysis time was 85 min in order to produce an optimum reducing sugar amount of 11.884 g/L. The enzymatic hydrolysis step was where the cellulose was broken down into glucose and other hexose sugar. This step was carried out using a cellulase enzyme (activity: 10 U/mg) that was extracted from trichoderma virdie. The reducing sugar yield was obtained to be 588 mg of reducing sugar per gram of water hyacinth. The theoretical yield of enzymatic hydrolysis was 886 mg of reducing sugar per gram of water hyacinth and in turn the efficiency was obtained to be 66.36%. Finally, during the fermentation process, Saccharomyces cerevisae was used for the production of ethanol from the fermentable sugars. The bioethanol obtained in the fermentation broth was 7.18 %( v/v). After distillation, 72 %( v/v) was recovered and used for further characterization by FTIR and other physic-chemical characteristics such as density, API gravity, specific gravity, refractive index and pH. It was concluded that 0.168 g of bioethanol can be produced from 1 g of water hyacinth if Saccharomyces cerevisae is used and a total reducing sugar of 0.759 g is produced per gram of water hyacinth.
The dynamic nature of conflict in Wikipedia
Creators: name: Gandica, Y.
name: Aidos, F. Sampaio dos
name: Carvalho, J.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Physics and Society (physics.soc-ph)
subject: Social and Information Networks (cs.SI)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: The voluntary process of Wikipedia edition provides an environment where the outcome is clearly a collective product of interactions involving a large number of people. We propose a simple agent-based model, developed from real data, to reproduce the collaborative process of Wikipedia edition. With a small number of simple ingredients, our model mimics several interesting features of real human behaviour, namely in the context of edit wars. We show that the level of conflict is determined by a tolerance parameter, which measures the editors' capability to accept different opinions and to change their own opinion. We propose to measure conflict with a parameter based on mutual reverts, which increases only in contentious situations. Using this parameter, we find a distribution for the inter-peace periods that is heavy-tailed. The effects of wiki-robots in the conflict levels and in the edition patterns are also studied. Our findings are compared with previous parameters used to measure conflicts in edit wars.
description: 12 pages, 7 figures
The jet apparent motion and central engine study of Fermi blazars
Creators: name: Xiao, H. B.
name: Zhu, J. T.
name: Fan, J. H.
name: Pei, Z. Y.
name: Luo, Z. J.
name: Zhang, S. H.
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The study of blazar jet has been performed for several decades via the VLBI technique, while its generation and propagation stay unclear. In the present work, we compiled a sample of 407 VLBI detected \textit{Fermi} blazars (VFBs) and studied the correlations between apparent velocity (${\rm log}\,β_{\rm app}$) and jet/accretion disk properties. We found a positive correlation between $γ$-ray luminosity (${\rm log}\,L_{\rm γ}$) and ${\rm log}\,β_{\rm app}$, the correlation suggests that the apparent motion of jet knot is related to the jet power.
description: 11 pages, 7 figures, 3 tables
The quernstones from Hunsbury hillfort, Northamptonshire
Creators: name: Ingle, Caroline
Publisher: name: Archaeology Data Service
Year: 2020

description: Northamptonshire Archaeology, 25, 21-33
description: Northampton Museum houses a collection of 124 quernstones which are thought to have come from the Iron Age hillfort. The querns exhibit a wide variety of forms, and they have been divided into ten broad lithological groups: as a collection from a single site they are quite possibly unique for the wide range of rock types present and forms represented. They indicate clearly that Hunsbury was a site of importance with wide-ranging contacts, from Derbyshire and Lincolnshire in the north, to Kent and Sussex in the south.
A note on adjoint error estimation for one-dimensional stationary balance laws with shocks
Creators: name: Schütz, Jochen
name: Noelle, Sebastian
name: Steiner, Christina
name: May, Georg
Publisher: name: arXiv
Year: 2014
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics

description: We consider one-dimensional steady-state balance laws with discontinuous solutions. Giles and Pierce realized that a shock leads to a new term in the adjoint error representation for target functionals.This term disappears if and only if the adjoint solution satisfies an internal boundary condition. Curiously, most computer codes implementing adjoint error estimation ignore the new term in the functional, as well as the internal adjoint boundary condition. The purpose of this note is to justify this omission as follows: if one represents the exact forward and adjoint solutions as vanishing viscosity limits of the corresponding viscous problems, then the internal boundary condition is naturally satisfied in the limit.
title: Faire rire en enseignant
title: mise en scène burlesque ou médiation utile à l'apprentissage ? A quelles fins pédagogiques l'humour est-il utilisé dans les classes de secondaire I ?
titleType: Subtitle
Creators: name: Piemontesi, Angelina
Publisher: name: Unknown
Year: 0
Subjects: subject: humour
subject: apprentissage
subject: relation enseignant/élèves
subject: motivation
subject: climat de classe
subject: mémorisation

description: Tous les enseignants le savent, l’humour vient souvent franchir la porte de leur salle de classe. Dans cette dernière, l’humour se manifeste sous plusieurs formes : une situation cocasse, une blague, un dessin humoristique ou encore un fou rire incontrôlé. Utilisé par les enseignants ou les élèves, il provoque généralement un grand moment de détente. Mais quelles sont réellement ses fonctions dans l’univers si sérieux qu’est l’école ? Pour comprendre le fonctionnement de l’humour dans une salle de classe, ce mémoire propose une définition des concepts liés à l’humour, au premier rang desquels l’émotion, qui joue un rôle important sur l’apprentissage des élèves et leur motivation. Une partie sur les différentes théories en lien avec l’humour amène ce mémoire à se pencher sur un concept plus simple à étudier et à observer : le rire. De sa fonction dans la vie quotidienne à son mécanisme, quelques-uns de ses aspects sont exposés pour tenter de le saisir. Ces différents points théoriques mènent à l’association centrale de cette recherche : humour et apprentissage. Quatre axes en lien avec l’apprentissage permettent de mettre en évidence cette association : la relation enseignant-élèves, la motivation et l’investissement des apprenants, le climat de classe ainsi que la mémorisation. C’est à partir de ces quatre axes que les entretiens semi-directifs menés auprès de cinq enseignants de secondaire I sont analysés afin de comprendre à quelles fins pédagogiques l’humour est utilisé dans une classe. Ce mémoire présente l’humour comme un atout permettant de favoriser l’apprentissage des élèves à plusieurs niveaux. Cependant, il n’est pas pour autant une recette miracle et mérite d’être utilisé avec parcimonie sans en faire ni un principe ni une règle.
description: Mémoire professionnel, Master en enseignement pour le degré secondaire I
Palladium-catalyzed hydrogenations in dichloromethane
Creators: name: Mason, David J.
name: Timofeyenko, Yegor G.
name: Jagadish, Bhumasamudram
name: Mash, Eugene A.
Publisher: name: Taylor & Francis
Year: 2022
Subjects: subject: Biochemistry
subject: Biotechnology
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Marine Biology
subject: Cancer

description: Dichloromethane is shown to be a useful solvent in catalytic hydrogenation reactions of easily reduced functional groups (alkenes, alkynes, imines, and nitroarenes) using palladium on carbon as the catalyst under mild conditions (ambient pressure and temperature).
Iron Age and Anglo-Saxon settlement and activity around the Hunsbury hillfort, Northampton
Creators: name: Jackson, Dennis A
Publisher: name: Archaeology Data Service
Year: 2020

description: Northamptonshire Archaeology, 25, 35-46
description: Watching briefs and limited rescue excavation work carried out during development on the Hunsbury ridge in the 1980s revealed intense Iron Age and Anglo-Saxon activity in the area around the Iron Age hillfort. Unfinished iron objects found during quarrying at Hunsbury suggest some form of local manufacture/production and that ironworking and trading may have formed important elements in the Iron Age economy of the region. There was pottery and inhumation evidence of Anglo-Saxon activity and a small Anglo-Saxon iron-smelting furnace was found. The hillfort enclosure could have been an important centre in both Iron Age and early Anglo-Saxon periods, but the availability of iron ore on Hunsbury ridge may also have influenced the settlement pattern and activity in the area in both periods.
From linear to circular polarized light -- Floquet engineering in Kitaev-Heisenberg materials with Lissajous figures
Creators: name: Strobel, Pascal
name: Daghofer, Maria
Publisher: name: arXiv
Year: 2023
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: This paper discusses Floquet engineering with arbitrary polarization in $α$-RuCl$_3$. We describe the influence of arbitrary polarization and the limiting cases of linear and circular polarization. The corresponding model is derived via perturbation theory up to fourth-order. Starting from linear and circular polarization we bridge the gap between those two limiting cases. We then we study more complex Lissajous figures and general trends arising for them.
description: 13 pages, 9 figures
Supplementary Information from Direct quantification of skeletal pneumaticity illuminates ecological drivers of a key avian trait
Creators: name: Burton, Maria Grace P.
name: Benson, Roger B. J.
name: Field, Daniel J.
Publisher: name: The Royal Society
Year: 2023
Subjects: subject: Evolutionary Biology
subject: FOS: Biological sciences

description: Skeletal pneumaticity is a key feature of extant avian structure and biology, which first evolved among the non-flying archosaurian ancestors of birds. The widespread presence of air-filled bones across the postcranial skeleton is unique to birds among living vertebrates, but the true extent of skeletal pneumaticity has never been quantitatively investigated—hindering fundamental insights into the evolution of this key avian feature. Here, we use microCT scans of fresh, frozen birds to directly quantify the fraction of humerus volume occupied by air across a phylogenetically diverse taxon sample to test longstanding hypotheses regarding the evolution and function of avian skeletal pneumatization. Among other insights, we document weak positive allometry of internal air volume with humeral size among pneumatized humeri and provide strong support that humeral size, body mass, aquatic diving, and the presence or absence of pneumaticity all have independent effects on cortical bone thickness. Our quantitative evaluation of humeral pneumaticity across extant avian phylogeny sheds new light on the evolution and ontogenetic progression of an important aspect of avian skeletal architecture, and suggests that the last common ancestor of crown birds possessed a highly pneumatized humerus.
Fractal dual substitution tilings
Creators: name: Frank, Natalie Priebe
name: Webster, Samuel B. G.
name: Whittaker, Michael F.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Dynamical Systems (math.DS)
subject: Metric Geometry (math.MG)
subject: FOS: Mathematics

description: Starting with a substitution tiling, we demonstrate a method for constructing infinitely many new substitution tilings. Each of these new tilings is derived from a graph iterated function system and the tiles have fractal boundary. We show that each of the new tilings is mutually locally derivable to the original tiling. Thus, at the tiling space level, the new substitution rules are expressing geometric and combinatorial, rather than topological, features of the original. Our method is easy to apply to particular substitution tilings, permits experimentation, and can be used to construct border-forcing substitution rules. For a large class of examples we show that the combinatorial dual tiling has a realization as a substitution tiling. Since the boundaries of our new tilings are fractal we are led to compute their fractal dimension. As an application of our techniques we show how to compute the Čech cohomology of a (not necessarily border-forcing) tiling using a graph iterated function system of a fractal tiling.
description: 33 pages
Combining QED and QCD transverse-momentum resummation for W and Z boson production at hadron colliders
Creators: name: Autieri, Andrea
name: Cieri, Leandro
name: Ferrera, Giancarlo
name: Sborlini, German F. R.
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: In this article, we consider the transverse momentum ($q_T$) distribution of $W$ and $Z$ bosons produced in hadronic collisions. We combine the $q_T$ resummation for QED and QCD radiation including the QED soft emissions from the $W$ boson in the final state. In particular, we perform the resummation of enhanced logarithmic contributions due to soft and collinear emissions at next-to-leading accuracy in QED, leading-order accuracy for mixed QED-QCD and next-to-next-to-leading accuracy in QCD. In the small-$q_T$ region we consistently include in our results the next-to-next-to-leading order (i.e.\ two loops) QCD corrections and the next-to-leading order (i.e.\ one loop) electroweak corrections. The matching with the fixed-order calculation at large $q_T$ has been performed at next-to-leading order in QCD (i.e.\ at $\mathcal{O}(α_S^2)$) and at leading order in QED. We show numerical results for $W$ and $Z$ production at the Tevatron and the LHC. Finally, we consider the effect of combined QCD and QED resummation for the ratio of $W$ and $Z$ $q_T$ distributions, and we study the impact of the QED corrections providing an estimate of the corresponding perturbative uncertainties.
description: 26 pages, 7 figures
$Z$ boson radiative decays to a $S$-wave quarkonium at NNLO and NLL accuracy
Creators: name: Sang, Wen-Long
name: Yang, De-Shan
name: Zhang, Yu-Dong
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Within the framework of nonrelativistic QCD (NRQCD) factorization formalism, we compute QCD next-to-next-to-leading order (NNLO) corrections to the helicity amplitudes as well as the decay width of $Z\to H+γ$, where $H$ can be $η_Q (Q=c,b), J/ψ$, or $Υ$. In addition, we resum the next-to-leading logarithms (NLL) of ${m_Z^2}/{m_Q^2}$ to all orders of $α_s$ for the leading-twist helicity amplitude by employing the light-cone factorization approach. It is worth mentioning that we obtain the analytic expressions of the truncated NLL at $α_s^2$. We find that the $\mathcal{O}(α_s)$ corrections are around 10\% for $η_c$ and $Υ$ productions, however insignificant for $J/ψ$ and $η_b$ productions. The $\mathcal{O}(α_s^2)$ corrections are moderate for charmonium production, while very small for bottomonium production. Moreover, it is found that the NLL resummation can considerably alter the NRQCD prediction, especially for $J/ψ$ production. Combining the NRQCD and light-cone computation, we make phenomenological predictions on the decay widths and branching fractions. In addition, we investigate the dependence of the theoretical results on the heavy quark mass, and find the branching fraction of $Z\to H+γ$ monotonically decreases as $m_Q$ increases.
description: 21 pages, 2 figures, 3 tables. correct typos, add the comparison with LC models, match the published version in PRD. arXiv admin note: text overlap with arXiv:2208.10118
Microwave-assisted synthesis of functionalized carbazoles via palladium-catalyzed aryl C–H activation and study of their interactions with calf-thymus DNA
Creators: name: Alam, Safiul
name: Karim, Rejaul
name: Khan, Aminur
name: Mallick, Asifur Rahaman
name: Sepay, Nayim
name: Ghosh, Soumen
Publisher: name: Taylor & Francis
Year: 2022
Subjects: subject: Biophysics
subject: Biochemistry
subject: Space Science
subject: Medicine
subject: Biotechnology
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: 111714 Mental Health
subject: FOS: Health sciences

description: An efficient method is reported to prepare functionalized carbazoles in excellent yields under mild conditions through microwave-assisted Pd-catalyzed aryl C–H activation of 2-iodo-N-arylanilines. The use of DBU (1,8-diazabicyclo[5.4.0]undec-7-ene) as a base is found advantageous. Microwave is found beneficial to shorten the reaction time, improve yield, and reduce the amount of base and solvent consumption. Moreover, it offers the access to 4-acetylcarbazole, which was not obtained under conventional heating conditions. Interactions of carbazoles with calf-thymus DNA are investigated by monitoring the change in their photophysical properties. Experimental results hint that the dominant mode of binding of carbazoles with ct-DNA is groove binding in nature and thermodynamically favorable. The highest binding interaction is observed for 4-acetylcarbazole, and the reason behind unequal interactions for different carbazoles can be rationalized by considering the nature and position of functional groups at carbazoles which can affect H-bonding and hydrophobic interactions. Experimental results are in good agreement with molecular docking results. Microwave-assisted Pd-catalyzed synthesis of carbazoles and their interactions with ct-DNA is reported. Experimental results and docking study hint at groove binding as the dominant binding mode, and 4-acetylcarbazole shows the highest binding interactions.
A Fusion of Labeled-Grid Shape Descriptors with Weighted Ranking Algorithm for Shapes Recognition
Creators: name: Ahmad, Jamil
name: Jan, Zahoor
name: Zia-Ud-Din
name: Khan, Shoaib Muhammad
Publisher: name: arXiv
Year: 2014
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Retrieving similar images from a large dataset based on the image content has been a very active research area and is a very challenging task. Studies have shown that retrieving similar images based on their shape is a very effective method. For this purpose a large number of methods exist in literature. The combination of more than one feature has also been investigated for this purpose and has shown promising results. In this paper a fusion based shapes recognition method has been proposed. A set of local boundary based and region based features are derived from the labeled grid based representation of the shape and are combined with a few global shape features to produce a composite shape descriptor. This composite shape descriptor is then used in a weighted ranking algorithm to find similarities among shapes from a large dataset. The experimental analysis has shown that the proposed method is powerful enough to discriminate the geometrically similar shapes from the non-similar ones.
A novel and efficient magnetically recoverable copper catalyst [MNPs-guanidine-bis(ethanol)-Cu] for Pd-free Sonogashira coupling reaction
Creators: name: Patra, Indrajit
name: Mohammed, Faris H.
name: Aldulaimi, Ahmed Kareem Obaid
name: khudhair, Dunia Abbas
name: Mustafa, Yasser Fakri
Publisher: name: Taylor & Francis
Year: 2022
Subjects: subject: Biochemistry
subject: 29999 Physical Sciences not elsewhere classified
subject: FOS: Physical sciences
subject: Medicine
subject: Neuroscience
subject: Physiology
subject: FOS: Biological sciences
subject: Biotechnology
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

description: We designed and fabricated a copper complex immobilized on the surface of silica-coated magnetic nanoparticles modified with guanidine-bis ethanol (prepared via the ring-opening reaction of MNPs-guanidine with epoxide). FT-IR spectroscopy, Scanning electron microscope (SEM, Transmission electron microscopy (TEM), Energy-dispersive X-ray spectroscopy (EDS), Thermogravimetric analysis (TGA), Vibrating sample magnetometer (VSM), X-ray diffraction (XRD), Elemental mapping, Atomic absorption spectroscopy (AAS), Inductively Coupled Plasma Optical Emission spectroscopy (ICP-OES) and Elemental mapping-analysis were used to characterize the structure of MNPs-guanidine-bis(ethanol)-Cu nanocatalyst. The MNPs-guanidine-bis(ethanol)-Cu nanocomposite showed high catalytic activity in the Pd-free Sonogashira cross-coupling reactions. The MNPs-guanidine-bis(ethanol)-Cu catalyst was consistent toward a variety of aryl halides bearing amine, acid, aldehyde, nitro, etc., functional groups, where high-to-excellent yields were obtained for all substrates. The copper nanocatalyst could be easily recovered by a simple magnetic separation and recycled at least 8 times without deterioration in catalytic activity.
Excavations at Berry Hill Close, Culworth, Northamptonshire, 1992
Creators: name: Audouy, Michel
Publisher: name: Archaeology Data Service
Year: 2020

description: Northamptonshire Archaeology, 25, 47-62
description: Archaeological investigation of an area required for cemetery extension revealed the remains of Middle Iron Age enclosure. None of the recorded features survived above the natural ironstone, and the only overlying stratification was a thick layer of agricultural subsoil. The lack of evidence of Saxon and medieval occupation is particularly noticeable given the proximity of a contemporary ringwork.
Guglielmo di Conches e il Dragmaticon Philosophiae
Creators: name: Ferrara, Carmine
Publisher: name: Universita degli studi di Salerno
Year: 2016
Subjects: subject: M-FIL/08 STORIA DELLA FILOSOFIA MEDIEVALE
subject: Guglielmo
subject: Dragmaticon

description: 2013 - 2014
description: This dissertation about William of Conches and the Dragmaticon Philosophiae is divided into two sections. The aim of the first section is to reconstruct the life and the literary works of one of the most important teachers of Chartres of the twelfth century. The aim of the second section is to analyse his most important work, written between 1146 and 1149, after undergoing a noteworthy process of rethinking, reorganization and enlargement of his youthful work, called Philosophia, which had been bitterly attacked by the cistercian monk William of Saint-Thierry, who denounced its serious theological errors in 1140 or 1141. The enquiry about the life of William of Conches, to which the first chapter is dedicated, has produced some interesting results, which seem to open new areas of research, especially regarding the philosopher’s place of birth (which may not well be Conches, but Saint-Martin du Tilleul) and the last phase of his life, which could have ended in England at the court of Henry II (to whom William was tutor during the writing of the Dragmaticon), or in Paris as magister scholae. The enquiry about the literary works of William of Conches, to which the second chapter is dedicated, deals with a detailed presentation of the historiographical debate, that has so far led to the identification of the works currently attributed to the philosopher. .. [edited by Author]
description: Il presente lavoro di tesi su Guglielmo di Conches e il Dragmaticon Philosophiae consta di due sezioni. La prima è finalizzata a ricostruire la vita e l’opera di uno dei più famosi maestri di Chartres del secolo XII. La seconda intende fornire un’analisi della sua opera maggiore, redatta tra il 1146 e il 1149 a seguito di un poderoso lavoro di ripensamento, riorganizzazione e ampliamento di un suo trattato giovanile, dal titolo Philosophia, oggetto intorno al 1140/41 di una spietata requisitoria da parte del monaco cistercense Guglielmo di Saint-Thierry, che ne denunciava i gravi errori teologici. L’indagine sulla vita di Guglielmo di Conches, cui è dedicato il primo capitolo, ha condotto a delle scoperte interessanti, che sembrano aprire nuovi spazi di ricerca soprattutto relativamente al luogo di nascita del filosofo (che potrebbe non essere Conches, ma Saint-Martin du Tilleul) e all’ultima fase della sua vita, che potrebbe essersi conclusa in Inghilterra presso la corte di Enrico II (del quale fu istitutore negli anni in cui si dedicò alla stesura del Dragmaticon), oppure a Parigi come magister scholae. Nell’indagine sulla produzione letteraria di Guglielmo di Conches, cui è dedicato il secondo capitolo, ci si è occupati principalmente di ricostruire in modo dettagliato il dibattito storiografico che ha condotto all’individuazione delle opere che attualmente vengono attribuite al filosofo. .. [a cura dell'Autore]
Bose-Einstein Condensation in an electro-pneumatically transformed quadrupole-Ioffe magnetic trap
Creators: name: Kumar, Sunil
name: Sarkar, Sumit
name: Verma, Gunjan
name: Vishwakarma, Chetan
name: Noaman, Md.
name: Rapol, Umakant
Publisher: name: arXiv
Year: 2014
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We report a novel approach for preparing a Bose-Einstein condensate (BEC) of $^{87}$Rb atoms using electro-pneumatically driven transfer of atoms into a Quadrupole-Ioffe magnetic trap (QUIC Trap). More than 5$\times$$10^{8}$ atoms from a Magneto-optical trap are loaded into a spherical quadrupole trap and then these atoms are transferred into an Ioffe trap by moving the Ioffe coil towards the center of the quadrupole coil, thereby, changing the distance between quadrupole trap center and the Ioffe coil. The transfer efficiency is more than 80 \%. This approach is different from a conventional approach of loading the atoms into a QUIC trap wherein the spherical quadrupole trap is transformed into a QUIC trap by changing the currents in the quadrupole and the Ioffe coils. The phase space density is then increased by forced rf evaporative cooling to achieve the Bose-Einstein condensation having more than $10^{5}$ atoms.
description: 5 pages, 5 figures
Gluing variations
Creators: name: Chruściel, Piotr T.
name: Cong, Wan
Publisher: name: arXiv
Year: 2023
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We establish several results on gluing/embedding/extending geometric structures in vacuum spacetimes with a cosmological constant in any spacetime dimensions $d\ge 4$, with emphasis on characteristic data. A useful tool is provided by the notion of submanifold-data of order $k$. As an application of our methods we prove that vacuum Cauchy data on a spacelike Cauchy surface with boundary can always be extended to vacuum data defined beyond the boundary.
description: Proof for extending vacuum metric on truncated cone extended; typos corrected; now, 30 pages main text + 7 pages appendix, 8 figures
Origin and z-distribution of Galactic diffuse [CII] emission
Creators: name: Velusamy, T.
name: Langer, W. D.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We determine the source of the diffuse [CII] emission by studying its spatial (radial and vertical) distributions. We used the HIFI [CII] Galactic survey (GOT C+), along with HI, 12CO, and 13CO data toward 354 lines of sight, and several HIFI [CII] and [CI] position-velocity maps. We quantified the emission in each spectral line profile by evaluating the intensities in 3 km/s wide velocity bins, 'spaxels'. Using the detection of [CII] with CO or [CI], we separated the dense and diffuse gas components. We derived 2-D Galactic disk maps using the spaxel velocities for kinematic distances. We separated the warm and cold H2 gases by comparing CO emissions with and without associated [CII]. We find evidence of widespread diffuse [CII] emission with a z-scale distribution larger than that for the total [CII] or CO. and it consists of (i) diffuse molecular (CO-faint) H2 clouds and (ii) diffuse HI clouds and/or WIM. In the inner Galaxy we find a lack of [CII] detections in a majority (~62%) of HI spaxels and show that the diffuse component primarily comes from the WIM (~21%) and that the HI gas is not a major contributor to the diffuse component (~6%). The warm-H2 radial profile shows an excess in the range 4 to 7 kpc, consistent with enhanced star formation there. We derive, for the first time, the 2-D [CII] spatial distribution in the plane and the z-distributions of the individual [CII] gas component. We estimate the fractional [CII] emission tracing (i) H2 gas in dense and diffuse molecular clouds as ~48% and ~ 14%, respectively, (ii) in the HI gas ~18%, and (iii) in the WIM ~21%. Including non-detections from HI increases the [CII] in HI to ~ 27%. The z-scale distributions FWHM are [CII] sources with CO, ~130 pc, (CO-faint) diffuse H2 gas, ~200 pc, and the diffuse HI and WIM, ~330 pc. CO observations, when combined with [CII], probe the warm-H2 gas, tracing star formation.
description: 20 pages, 15 figures, 4 tables
Time varying Na I D absorption in ILRTs as a probe of circumstellar material
Creators: name: Byrne, Robert
name: Fraser, Morgan
name: Cai, Yongzhi
name: Reguitti, Andrea
name: Valerin, Giorgio
Publisher: name: arXiv
Year: 2023
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Intermediate-Luminosity Red Transients (ILRTs) are a class of observed transient posited to arise from the production of an electron-capture supernova from a super-asymptotic giant branch star within a dusty cocoon. In this paper, we present a systematic analysis of narrow Na I D absorption as a means of probing the circumstellar environment of these events. We find a wide diversity of evolution in ILRTs in terms of line strength, time-scale, and shape. We present a simple toy model designed to predict this evolution as arising from ejecta from a central supernova passing through a circumstellar environment wherein Na II is recombining to Na I over time. We find that while our toy model can qualitatively explain the evolution of a number of ILRTs, the majority of our sample undergoes evolution more complex than predicted. The success of using the Na I D doublet as a diagnostic tool for studying circumstellar material will rely on the availability of regular high-resolution spectral observations of multiple ILRTs, and more detailed spectral modelling will be required to produce models capable of explaining the diverse range of behaviours exhibited by ILRTs. In addition, the strength of the Na I D absorption feature has been used as a means of estimating the extinction of sources, and we suggest that the variability visible in ILRTs would prevent such methods from being used for this class of transient, and any others showing evidence of variability
description: 14 pages, 10 figures, submitted to MNRAS
The predual and John-Nirenberg inequalities on generalized BMO martingale spaces
Creators: name: Jiao, Yong
name: Yang, Anming
name: Wu, Lian
name: Yi, Rui
Publisher: name: arXiv
Year: 2014
Subjects: subject: Functional Analysis (math.FA)
subject: FOS: Mathematics
subject: 60G46, 60G42

description: In this paper we introduce the generalized BMO martingale spaces by stopping time sequences, which enable us to characterize the dual spaces of martingale Hardy-Lorentz spaces $H_{p,q}^s$ for $0
description: 23pages