cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Effective field theory of weakly coupled inflationary models
Creators: name: Gwyn, Rhiannon
name: Palma, Gonzalo A.
name: Sakellariadou, Mairi
name: Sypsas, Spyros
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The application of Effective Field Theory (EFT) methods to inflation has taken a central role in our current understanding of the very early universe. The EFT perspective has been particularly useful in analyzing the self-interactions determining the evolution of co-moving curvature perturbations (Goldstone boson modes) and their influence on low-energy observables. However, the standard EFT formalism, to lowest order in spacetime differential operators, does not provide the most general parametrization of a theory that remains weakly coupled throughout the entire low-energy regime. Here we study the EFT formulation by including spacetime differential operators implying a scale dependence of the Goldstone boson self-interactions and its dispersion relation. These operators are shown to arise naturally from the low-energy interaction of the Goldstone boson with heavy fields that have been integrated out. We find that the EFT then stays weakly coupled all the way up to the cutoff scale at which ultraviolet degrees of freedom become operative. This opens up a regime of new physics where the dispersion relation is dominated by a quadratic dependence on the momentum ω~ p^2. In addition, provided that modes crossed the horizon within this energy range, the prediction of inflationary observables - including non-Gaussian signatures - are significantly affected by the new scales characterizing it.
description: 36 pages, v2: references added, minor changes to match published version
Stochastic disaggregation of daily rainfall for fine timescale design storms
Creators: name: Mahbub, S M Parvez
Publisher: name: CQUniversity
Year: 2021
Subjects: classificationCode: 370599
subject: Geology not elsewhere classified
classificationCode: 370799
subject: Hydrology not elsewhere classified

description: Investigates "the use of a stochastic rainfall disaggregation model on a regional basis to disaggregate daily rainfall into any desired fine timescale in the State of Queensland ... required for certain hydrologic modellings such as crop simulation modelling, erosion modelling etc."--Abstract.
New invariants of G_2-structures
Creators: name: Crowley, Diarmuid
name: Nordström, Johannes
Publisher: name: arXiv
Year: 2012
Subjects: subject: Geometric Topology (math.GT)
subject: Differential Geometry (math.DG)
subject: FOS: Mathematics
subject: 53C10, 57R15 (Primary) 53C25, 53C27, 57R50, 57R90 (Secondary)

description: We define a Z/48-valued homotopy invariant nu of a G_2-structure on the tangent bundle of a closed 7-manifold in terms of the signature and Euler characteristic of a coboundary with a Spin(7)-structure. For manifolds of holonomy G_2 obtained by the twisted connected sum construction, the associated torsion-free G_2-structure always has nu = 24. Some holonomy G_2 examples constructed by Joyce by desingularising orbifolds have odd nu. We define a further homotopy invariant xi of G_2-structures such that if M is 2-connected then the pair (nu, xi) determines a G_2-structure up to homotopy and diffeomorphism. The class of a G_2-structure is determined by nu on its own when the greatest divisor of p_1(M) modulo torsion divides 224; this sufficient condition holds for many twisted connected sum G_2-manifolds. We also prove that the parametric h-principle holds for coclosed G_2-structures.
description: 26 pages, 1 figure. v3: Defined further invariant, strengthened classification results, changed title
Formulation and testing of social impacts assessment for tourism development
Creators: name: Carson, D
Publisher: name: CQUniversity
Year: 2017
Subjects: classificationCode: 350801
subject: Impacts of tourism

description: The growth of the tourism industry, and its acceptance as an integral part of Australia's economic fabric has led to increasing attempts by Australian communities to attract tourists. While techniques have been developed for considering the economic, and environmental, implications of tourism for communities, investigation of social impacts has remained relatively unsophisticated. Despite the development of general social impacts assessment methods both internationally (Finsterbusch, Llwellyn, and Wolf, 1983; Canter, Atkinson, and Leistritz, 1986), and in Australia (Bowles, 1981; Wildman, 1985; Robinson and Syme, 1988), there has not been a systematic attempt to apply these methods in the context of tourism development. This thesis argues that the unique characteristics of tourism arise from the interaction of supplier and consumer in the supplier's environment. The need for communities to 'host' tourists emphasises the potential impacts of this interaction. This study adopts a definition of community that considers both geographical boundaries, and the propensity of residents within those boundaries to make use of community facilities. Within the host community, a variety of perceptions of the impacts of tourism may exist. It is concluded that social impacts are the consequences of development on the quality of life of community members. Assessing the social impacts of tourism development involves assessing the threats and opportunities that these developments present to the quality of life. The thesis proposes a method which can be used to gauge the level of resident's participation in the community, their quality of life priorities, and their attitudes to specific tourism developments. The method was piloted in the Central Queensland community of Mt Morgan. Analysis of the pilot study indicated that the social impacts of tourism can be assessed by exploring the interactions between community participation, quality of life, and the attributes of tourism developments. The methodological analysis and pilot study led to the development of the Host Attitudes to Tourism (HATT) Model, which contributes to tourism social impacts assessment by formally modelling the processes of the development of community attitudes to tourism. The thesis does not champion a particular theoretical approach to tourism social impacts assessment, but develops a methodological technique and model which can assist communities in assessing the full range of implications of attracting tourists.
2000 Jahre alt - das Trevererdenkmal für die Söhne des Augustus (4 n. Chr.) : Zur ältesten Monumentalinschrift der Rheinlande
Creators: name: Schwinden, Lothar
Publisher: name: Funde und Ausgrabungen im Bezirk Trier
Year: 2019

description: [nicht vorhanden]
description: Funde und Ausgrabungen im Bezirk Trier, Bd. 36 (2004): Funde und Ausgrabungen im Bezirk Trier : Aus der Arbeit des Rheinischen Landesmuseums Trier
Minimal Dilaton Model
Creators: name: Abe, Tomohiro
name: Kitano, Ryuichiro
name: Konishi, Yasufumi
name: Oda, Kin-ya
name: Sato, Joe
name: Sugiyama, Shohei
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We construct a minimal calculable model of a light dilaton based on the scenario where only top and Higgs sectors are involved in a quasiconformal dynamics. The model consistently accommodates the electroweak precision tests even when the Higgs boson is very heavy, thereby allowing one to consider the possibility that the particle at around 125GeV, discovered at the LHC experiments, is identified as the light dilaton rather than the Higgs boson. We find that the current LHC data allow distinct parameter regions where the observed particle is either mostly the Higgs boson or the dilaton.
description: 26pages, 19 figures (v1); References and a comment added (v2); Version on PRD, minor typo corrections and edits to match the journal criteria (v3)
Voltage-amplified heat rectification in SIS junctions
Creators: name: Khomchenko, Ilia
name: Ouerdane, Henni
name: Benenti, Giuliano
Publisher: name: arXiv
Year: 2022
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: The control of thermal fluxes -- magnitude and direction, in mesoscale and nanoscale electronic circuits can be achieved by means of heat rectification using thermal diodes in two-terminal systems. The rectification coefficient $\mathcal{R}$, given by the ratio of forward and backward heat fluxes, varies with the design of the diode and the working conditions under which the system operates. A value of $\mathcal{R}\ll 1$ or $\mathcal{R}\gg 1$ is a signature of high heat rectification performance but current solutions allowing such ranges, necessitate rather complex designs. Here, we propose a simple solution: the use of a superconductor-insulator-superconductor (SIS) junction under an applied fast oscillating (THz range) voltage as the control of the heat flow direction and magnitude can be done by tuning the initial value of the superconducting phase. Our theoretical model based on the Green functions formalism and coherent transport theory, shows a possible sharp rise of the heat rectification coefficient with values up to $\mathcal{R} \approx 500$ beyond the adiabatic regime. The influence of quantum coherent effects on heat rectification in the SIS junction is highlighted.
Stein's density approach and information inequalities
Creators: name: Ley, Christophe
name: Swan, Yvik
Publisher: name: arXiv
Year: 2012
Subjects: subject: Probability (math.PR)
subject: Information Theory (cs.IT)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences

description: We provide a new perspective on Stein's so-called density approach by introducing a new operator and characterizing class which are valid for a much wider family of probability distributions on the real line. We prove an elementary factorization property of this operator and propose a new Stein identity which we use to derive information inequalities in terms of what we call the \emph{generalized Fisher information distance}. We provide explicit bounds on the constants appearing in these inequalities for several important cases. We conclude with a comparison between our results and known results in the Gaussian case, hereby improving on several known inequalities from the literature.
description: This is a revised version of our paper "On a connection between Stein characterizations and Fisher information" (arXiv reference : arXiv:1111.2368). Essential changes have been made. Certain elements of the previous version remain relevant to the literature and have not been included in the present version, therefore we upload this as a new arXiv submission
Römische Kriegsschiffe auf der Mosel ? : Schiffsarchäologisch-historische Betrachtungen zum "Neumagener Weinschiff"
Creators: name: Bockius, Ronald
Publisher: name: Funde und Ausgrabungen im Bezirk Trier
Year: 2019

description: [nicht vorhanden]
description: Funde und Ausgrabungen im Bezirk Trier, Bd. 40 (2008): Funde und Ausgrabungen im Bezirk Trier : Aus der Arbeit des Rheinischen Landesmuseums Trier
"Säulentrümmer, Statuen, Ruhebänke [...] in mannigfacher und angenehmer Mischung" : Konzeption und Ausstattung der Gartenanlage "Nells Ländchen" bei Trier um 1800
Creators: name: Seewaldt, Peter
Publisher: name: Funde und Ausgrabungen im Bezirk Trier
Year: 2019

description: [nicht vorhanden]
description: Funde und Ausgrabungen im Bezirk Trier, Bd. 41 (2009): Funde und Ausgrabungen im Bezirk Trier : Aus der Arbeit des Rheinischen Landesmuseums Trier
Inhalt
Creators: name: Redaktion, Die
Publisher: name: Funde und Ausgrabungen im Bezirk Trier
Year: 2019

description: -
description: Funde und Ausgrabungen im Bezirk Trier, Bd. 41 (2009): Funde und Ausgrabungen im Bezirk Trier : Aus der Arbeit des Rheinischen Landesmuseums Trier
Probing parity-odd bispectra with anisotropies of GW $V$ modes
Creators: name: Orlando, Giorgio
Publisher: name: arXiv
Year: 2022
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: It is well known that non-trivial squeezed tensor bispectra can lead to anisotropies in the inflationary stochastic gravitational wave (GW) background, providing us with an alternative and complementary window to primordial non-Gaussianities (NGs) with respect to the CMB. Previous works have highlighted the detection prospects of parity-even tensor NGs via the GW $I$-mode anisotropies. In this work we extend this by analysing for the first time the additional information carried by GW $V$-mode anisotropies due to squeezed NGs. We show that GW $V$ modes allow us to probe parity-odd squeezed $\langle \rm tts \rangle$ and $\langle \rm ttt \rangle$ bispectra. These bispectra break parity at the non-linear level and can be introduced by allowing alternative symmetry breaking patterns during inflation, like those comprised in solid inflation. Considering a BBO-like experiment, we find that a non-zero detection of squeezed $\langle \rm tts \rangle$ parity-odd bispectra in the $V$ modes dipole is possible without requiring any short-scale enhancement of the GW power spectrum amplitude over the constraints set by the CMB. We also briefly discuss the role of $V$-CMB cross-correlations. Our work can be extended in several directions and motivates a systematic search for polarized GW anisotropies in the next generations of GW experiments.
description: 50 pages, 4 figures. v3: references added, improved explanations and definitions. Results unchanged. Matched published version
Resource allocation within plants: Some theoretical and practical implications for control of plant development
Creators: name: Yang, Zongjian
Publisher: name: CQUniversity
Year: 2021
Subjects: classificationCode: 300406
subject: Crop and pasture improvement (incl. selection and breeding)

description: A degree of in-crop management could provide growers with the option to manipulate growth and development in line with ambient weather conditions. Studies presented in this thesis explored this opportunity, and data so far collected support the 'nutrient diversion' hypothesis that internal resource availability and allocation play important roles in regulation of growth partitioning and phenological development. Different levels of defoliation were conducted on maize and cotton plants growing under contrasting water conditions to measure the effect of partial defoliation on their growth and production. In the environment of water stress with low average control yield, defoliation significantly diminished the negative impact caused by water deficit and led to smaller water-deficit-induced decrease of grain yield of maize plants and harvestable product of cotton plants. The relative yield advantage of defoliated plants in the water deficit environment can be attributed to defoliation-induced improvement in water status later in the growth cycle as reflected in measures of photosynthetic rate and stomatal conductance. Early-stage defoliation, removing different parts of maize plants, resulted in varied developmental responses. Removing only the fully exposed leaf blades did not delay the onset of tassel initiation, but tassel initiation and tassel emergence were significantly delayed by either removal of all the shoot tissues above the second ligule or removal of only the expanding leaves at a height just above the soil surface(with the first three or four fully exposed leaves left intact). Continued removal of the expanding leaves delayed tassel initiation further. This indicates the important role that expanding leaves play in control of the transition to reproductive growth. The elongation rate of leaf primordia underwent a gradual decrease as maize plants increased in size with time. The gradual decrease in rate of leaf primordium elongation and the resultant change in shoot apical architecture (described by relative length of leaf primordia) were strongly associated with floral induction. It is proposed that plant internal resource competition lessened the nutrient supply to the shoot apices and, therefore, affected leaf primordium growth and meristem identity simultaneously. The dynamic competition and interdependency among various plant parts were explored using a dynamic model constructed to simulate resource allocation and growth partitioning at the whole plant level.
Eine Rekonstruktionszeichnung der römischen Gräberstraße und der Villenanlage von Duppach-Weiermühle, Landkreis Vulkaneifel : Zur Situation im 4. Jahrhundert n. Chr.
Creators: name: Henrich, Peter
Publisher: name: Funde und Ausgrabungen im Bezirk Trier
Year: 2019

description: [nicht vorhanden]
description: Funde und Ausgrabungen im Bezirk Trier, Bd. 42 (2010): Funde und Ausgrabungen im Bezirk Trier : Aus der Arbeit des Rheinischen Landesmuseums Trier
Finite-bias conductance anomalies at a singlet-triplet crossing
Creators: name: Stevanato, Chiara
name: Leijnse, Martin
name: Flensberg, Karsten
name: Paaske, Jens
Publisher: name: arXiv
Year: 2012
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Quantum dots and single-molecule transistors may exhibit level crossings induced by tuning external parameters such as magnetic field or gate voltage. For Coulomb blockaded devices, this shows up as an inelastic cotunneling threshold in the differential conductance, which can be tuned to zero at the crossing. Here we show that, in addition, level crossings can give rise to a nearly vertical step-edge, ridge or even a Fano-like ridge-valley feature in the differential conductance inside the relevant Coulomb diamond. We study a gate-tunable quasidegeneracy between singlet and triplet ground states, and demonstrate how these different shapes may result from a competition between nonequilibrium occupations and weak (spin-orbit) mixing of the states. Our results are shown to be in qualitative agreement with recent transport measurements on a Mn complex [E. A. Osorio, et al., Nano Lett. 10, 105 (2010)]. The effect remains entirely general and should be observable in a wide range of Coulomb blockaded devices.
description: 8 pages, 6 figures. Published version
Structure of faunal assemblages on rehabilitated land
Creators: name: Knight, Richard
Publisher: name: CQUniversity
Year: 2017
Subjects: classificationCode: 410206
subject: Landscape ecology
classificationCode: 401905
subject: Mining engineering

description: "The present study had three objectives : firstly to examine the success of rehabilitation efforts on post mining substrates by analysis of trappable small vertebrates recolonising rehabilitated areas compared to control unmined areas ; secondly to examine the relationship between small vertebrates and the availability of appropriate microclimates in the environment by assessing a series of vegetation and habitat variables ; and thirdly to provide a comprehensive non-avian vertebrate species for the Blair Athol Coal Mine Lease." -- abstract. The present study had three objectives: firstly to examine the success of rehabilitation efforts on post mining substrates by analysis oftrappable small vertebrates recolonising rehabilitated areas compared to control unmined areas; secondly to examine the relationship between small vertebrates and theavailability of appropriate microclimates in the environment by assessing a series of vegetation and habitat variables; and thirdly to provide a comprehensive non-avian vertebrate species list for the Blair Athol Coal Mine Lease. A total of76 native species were identified on the mining lease, including 17 species of frogs, 27 species oflizards, 11 species of snakes, 2 species ofturtles and 19 mammals. as well as 8 introduced species. This study recorded six vertebrate species not previously known from the Clermont region: Cyclorana platycephala, Limnodynastes convexiusculus, L. sa/mini. {Jperolia mimula. Varanus acanthurus, and lsoodon macrourus. Surveys were performed at 21 sites over four sampling periods, including 12 reference sites, and nine rehabilitation sites. Rehabilitation sites of various ages were comparable in terms of vegetation and abiotic factors, and were significantly different from control sites, however the 1984 rehabilitation area had species diversity, relative abundance of species and guild structure similar to control sites. A remnant patch ofvegetation was similar to control sites in terms of vegetation and abiotic factors, but had lower species diversity and different relative abundances of species; suggesting that assessment of an ecosystem on the basis ofstructural components of the vegetation and abiotic environment alone may not adequately reflect the presence ofa functional ecosystem because ofthe confounding problem ofecosystem fragmentation. As a consequence. studies based on vegetation or physical attributes may not be sufficient to judge the success ofrehabilitation with respect to vertebrate fauna. The results produced by analysis ofabundance and diversity of insectivorous reptiles was found to reflect the pattern produced by analysis of all data, and as such this group is considered an appropriate indicator of ecosystem health in this community.
Altstraße - Römerstraße? : Das Beispiel Farschweiler, Kreis Trier-Saarburg
Creators: name: Nortmann, Hans
Publisher: name: Funde und Ausgrabungen im Bezirk Trier
Year: 2019

description: [nicht vorhanden]
description: Funde und Ausgrabungen im Bezirk Trier, Bd. 44 (2012): Funde und Ausgrabungen im Bezirk Trier : Aus der Arbeit des Rheinischen Landesmuseums Trier
Turning to a Teacher for Timestamp Supervised Temporal Action Segmentation
Creators: name: Zhao, Yang
name: Song, Yan
Publisher: name: arXiv
Year: 2022
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Temporal action segmentation in videos has drawn much attention recently. Timestamp supervision is a cost-effective way for this task. To obtain more information to optimize the model, the existing method generated pseudo frame-wise labels iteratively based on the output of a segmentation model and the timestamp annotations. However, this practice may introduce noise and oscillation during the training, and lead to performance degeneration. To address this problem, we propose a new framework for timestamp supervised temporal action segmentation by introducing a teacher model parallel to the segmentation model to help stabilize the process of model optimization. The teacher model can be seen as an ensemble of the segmentation model, which helps to suppress the noise and to improve the stability of pseudo labels. We further introduce a segmentally smoothing loss, which is more focused and cohesive, to enforce the smooth transition of the predicted probabilities within action instances. The experiments on three datasets show that our method outperforms the state-of-the-art method and performs comparably against the fully-supervised methods at a much lower annotation cost.
description: 6 pages, ICME 2022 oral
Spiders in central Queensland mango orchards: Diversity, diel activity and impact of pesticides
Creators: name: Rayner, Donna
Publisher: name: CQUniversity
Year: 2017
Subjects: classificationCode: 300804
subject: Horticultural crop protection (incl. pests, diseases and weeds)
classificationCode: 300499
subject: Crop and pasture production not elsewhere classified
classificationCode: 300802
subject: Horticultural crop growth and development

description: Spiders are naturally occurring predators of insects in agroecosystems. The use of broad spectrum pesticides in agriculture is likely to disrupted spider communities and have a negative impact on their role as biocontrollers. The overall abundance, the species richness, diversity and guild structure of spiders in tropical mango orchards in central Queensland were investigated in this study. Experiments were performed to assess the potential of spiders as natural predators to pest insects in mango orchards. The effects of pesticides on the spider communities were assessed to establish the extent to which the communities were disrupted and the extent of recovery from this type of disturbance. The short term (acute) and long term (chronic) effects were investigated. The spiders in unsprayed mango orchards were relatively high in abundance, species richness and species diversity. Spiders were present in significant numbers at all sampling times,both day and at night, and during all seasons. The results suggest that spiders do not capture large numbers of prey. However spider exhibit a diversity of capturing techniques so that they capture a variety of insects. The most common guild was the orb-weavers. The spider abundance and diversity four days after spraying with methidathion suggested that recovery of spider after disruption such as the use of pesticides' occurs quickly. Presumably this recovery occurs due to spiders moving into the orchard from surrounding bush land. The long term use of pesticide does appear to disrupt the community and as evidenced by decreases in the abundance, species richness and diversity of spiders. While it is unlikely that pesticide usage will be eliminated in most commercial mango orchards, this study demonstrates that spiders are potentially important biocontrollers and that they are adversely affected by pesticide use. In the longer term, it will be desirable to develop IPM strategies to minimise pesticide use and maximise the role of spiders as biocontrollers. Such strategies will depend on studies such as this one and extensions of it.
Havilla University, Nde-Ikom, Cross River State (2025/2026),ADMISSION FORM Is Out Call (O9078816209). Dr Mrs. GRACE A.A. Also sales of Academic Session Direct Entry Form, JUPEB Form,IJMB Form,Master Degree Form, Postgraduate Degree Form, Sandwich Form, Change of Institution Form,Change Of Course Form,Part Time Form E.T.C Contact Office of the Admin on O9078816209 for more For Inquiry.
Creators: name: Admin
Publisher: name: Zenodo
Year: 2025

description: Havilla University, Nde-Ikom, Cross River State (2025/2026),ADMISSION FORM Is Out Call (O9078816209). Dr Mrs. GRACE A.A. Also sales of Academic Session Direct Entry Form, JUPEB Form,IJMB Form,Master Degree Form, Postgraduate Degree Form, Sandwich Form, Change of Institution Form,Change Of Course Form,Part Time Form E.T.C Contact Office of the Admin on O9078816209 for more For Inquiry.
Counting factorizations of Coxeter elements into products of reflections
Creators: name: Chapuy, Guillaume
name: Stump, Christian
Publisher: name: arXiv
Year: 2012
Subjects: subject: Combinatorics (math.CO)
subject: Representation Theory (math.RT)
subject: FOS: Mathematics
subject: 20F55 (Primary), 05E10 (Secondary)

description: In this paper, we count factorizations of Coxeter elements in well-generated complex reflection groups into products of reflections. We obtain a simple product formula for the exponential generating function of such factorizations, which is expressed uniformly in terms of natural parameters of the group. In the case of factorizations of minimal length, we recover a formula due to P. Deligne, J. Tits and D. Zagier in the real case and to D. Bessis in the complex case. For the symmetric group, our formula specializes to a formula of D. M. Jackson.
description: 38 pages, including 18 pages appendix. To appear in Journal of the London Mathematical Society. v3: minor changes and corrected references; v2: added extended discussion on the definition of Coxeter elements
Ein Grenzstein erzählt : Zur Geschichte des Kartäuserklosters in Trier
Creators: name: Mewes, Simon
Publisher: name: Funde und Ausgrabungen im Bezirk Trier
Year: 2019

description: [nicht vorhanden]
description: Funde und Ausgrabungen im Bezirk Trier, Bd. 44 (2012): Funde und Ausgrabungen im Bezirk Trier : Aus der Arbeit des Rheinischen Landesmuseums Trier
Fomalhaut b: Independent Analysis of the Hubble Space Telescope Public Archive Data
Creators: name: Galicher, Raphael
name: Marois, Christian
name: Zuckerman, Ben
name: Macintosh, Bruce
Publisher: name: arXiv
Year: 2012
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: The nature and even the existence of a putative planet-mass companion ("Fomalhaut b") to Fomalhaut has been debated since 2008. In the present paper we reanalyze the multi-epoch ACS/STIS/WFC3 Hubble Space Telescope (HST) optical/near infrared images on which the discovery and some other claims were based. We confirm that the HST images do reveal an object in orbit around Fomalhaut but the detailed results from our analysis differ in some ways from previous discussions. In particular, we do not confirm flux variability over a two-year interval at 0.6 microns wavelength and we detect Fomalhaut b for the first time at the short wavelength of 0.43 microns. We find that the HST image of Fomalhaut b at $0.8\,μ$m may be extended beyond the PSF. We cannot determine from our astrometry if Fomalhaut b will cross or not the dust ring. The optical through mid-infrared spectral energy distribution (SED) of Fomalhaut b cannot be explained as due to direct or scattered radiation from a massive planet. We consider two models to explain the SED: (1) a large circumplanetary disk around an unseen planet and (2) the aftermath of a collision during the past 50-150 years of two Kuiper Belt-like objects of radii 50 km.
description: 24 pages, 9 figures, 5 tables, accepted on April, 3rd, 2013
Zwischen Deutschland und Frankreich : Johann Baptist Keune (1858-1937) - ein moselländischer Archäologe in Metz und Trier
Creators: name: Trapp, Julien
name: Merten, Jürgen
Publisher: name: Funde und Ausgrabungen im Bezirk Trier
Year: 2019

description: [nicht vorhanden]
description: Funde und Ausgrabungen im Bezirk Trier, Bd. 44 (2012): Funde und Ausgrabungen im Bezirk Trier : Aus der Arbeit des Rheinischen Landesmuseums Trier
Werben für "Nero": Marketing für ein erfolgreiches Ausstellungsprojekt in Trier
Creators: name: Altmayer, Tina
name: Kurtze, Anne
Publisher: name: Funde und Ausgrabungen im Bezirk Trier
Year: 2019

description: [nicht vorhanden]
description: Funde und Ausgrabungen im Bezirk Trier, Bd. 48 (2016): Funde und Ausgrabungen im Bezirk Trier : Aus der Arbeit des Rheinischen Landesmuseums Trier
Quantum mechanics in fractional and other anomalous spacetimes
Creators: name: Calcagni, Gianluca
name: Nardelli, Giuseppe
name: Scalisi, Marco
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Mathematical Physics (math-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We formulate quantum mechanics in spacetimes with real-order fractional geometry and more general factorizable measures. In spacetimes where coordinates and momenta span the whole real line, Heisenberg's principle is proven and the wave-functions minimizing the uncertainty are found. In spite of the fact that ordinary time and spatial translations are broken and the dynamics is not unitary, the theory is in one-to-one correspondence with a unitary one, thus allowing us to employ standard tools of analysis. These features are illustrated in the examples of the free particle and the harmonic oscillator. While fractional (and the more general anomalous-spacetime) free models are formally indistinguishable from ordinary ones at the classical level, at the quantum level they differ both in the Hilbert space and for a topological term fixing the classical action in the path integral formulation. Thus, all non-unitarity in fractional quantum dynamics is encoded in a contribution depending only on the initial and final state.
description: 22 pages, 1 figure. v2: typos corrected
Multi-Octave Interference Detectors with Sub-Microsecond Response
Creators: name: Khater, Mohammad Abu
name: Peroulis, Dimitrios
Publisher: name: arXiv
Year: 2022
Subjects: subject: Signal Processing (eess.SP)
subject: Systems and Control (eess.SY)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: High-power interferers are one of the main hurdles in wideband communication channels. To that end, this paper presents a wideband interferer detection method. The presented technique operates by sampling the incoming signal as an input, and produces the frequency and the power readings of the detected interferer. The detection method relies on driving an open circuit stub, where the voltage is proportional to the power of the interferer, and the standing wave pattern is an indicator of its frequency. This approach is feasible over multi-octave bandwidth with a wide power dynamic range. The concept is analyzed for design and optimization, and a prototype is built for a proof-of-concept. The measured results demonstrate the ability to detect an interferer within the 1--16 GHz frequency range, with a power dynamic range between -20 to 20 dBm. The detection concept is also fitted with different types of tunable bandstop filters (BSFs) for automatic detection and suppression of the interferer if its power exceeds a programmable threshold. With a measured response time of 500 ns, the presented method is a technology enabler for wideband receivers.
David Breeze, Bearsden. A Roman Fort on the Antonine Wall
Creators: name: Rummel, Christoph
Publisher: name: Germania : Anzeiger der Römisch-Germanischen Kommission des Deutschen Archäologischen Instituts
Year: 2019

description: Rezension zu: David Breeze, Bearsden. A Roman Fort on the Antonine Wall. The Society for Antiquaries of Scotland, Edinburgh 2016. ISBN 978-1-90833-208-0. xxxii + 405 Seiten mit 277 Abbildungen und 59 Tafeln
description: Germania : Anzeiger der Römisch-Germanischen Kommission des Deutschen Archäologischen Instituts, Bd. 96 2018(2019)
Geometric structure of thermal cones
Creators: name: Junior, A. de Oliveira
name: Czartowski, Jakub
name: Życzkowski, Karol
name: Korzekwa, Kamil
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The second law of thermodynamics imposes a fundamental asymmetry in the flow of events. The so-called thermodynamic arrow of time introduces an ordering that divides the system's state space into past, future and incomparable regions. In this work, we analyse the structure of the resulting thermal cones, i.e., sets of states that a given state can thermodynamically evolve to (the future thermal cone) or evolve from (the past thermal cone). Specifically, for a $d$-dimensional classical state of a system interacting with a heat bath, we find explicit construction of the past thermal cone and the incomparable region. Moreover, we provide a detailed analysis of their behaviour based on thermodynamic monotones given by the volumes of thermal cones. Results obtained apply also to other majorisation-based resource theories (such as that of entanglement and coherence), since the partial ordering describing allowed state transformations is then the opposite of the thermodynamic order in the infinite temperature limit. Finally, we also generalise the construction of thermal cones to account for probabilistic transformations.
description: 22 pages, 16 figures. Published version
Anisotropic Spatial Entanglement
Creators: name: Patil, Satyajeet
name: Prabhakar, Shashi
name: Biswas, Ayan
name: Kumar, Ashok
name: Singh, R. P.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The photon-pairs generated through spontaneous parametric down-conversion (SPDC) possess strong correlations in their transverse position and momentum degrees of freedom. For such photon pairs, the transverse position correlation length depends on the crystal thickness and the pump wavelength, whereas the transverse momentum correlation length depends on the beam waist and spatial coherence length of the pump. By controlling these parameters, it is possible to engineer the spatial entanglement. Here, we utilize the circular asymmetry of the pump by using an elliptical-Gaussian beam to change the degree of entanglement in transverse directions, which we call anisotropic entanglement. We show the interrelation between the degree of anisotropic entanglement and the asymmetry in the beam width. In addition, we also show that for a highly asymmetric pump beam, the entanglement along the y-direction completely vanishes, whereas the entanglement in the x-direction remains intact.
Raymund Gottschalk, Spätrömische Gräber im Umland von Köln
Creators: name: Enckevort, Harry Van
Publisher: name: Germania : Anzeiger der Römisch-Germanischen Kommission des Deutschen Archäologischen Instituts
Year: 2019

description: Rezension zu: Raymund Gottschalk, Spätrömische Gräber im Umland von Köln. Rheinische Ausgrabungen Band 71. Philipp von Zabern, Darmstadt 2015. ISBN 978-3-8053-4956-7. XII + 402 pages, 174 figures, 5 tables, 157 plates
description: Germania : Anzeiger der Römisch-Germanischen Kommission des Deutschen Archäologischen Instituts, Bd. 96 2018(2019)
PT Metamaterials via Complex-Coordinate Transformation Optics
Creators: name: Castaldi, Giuseppe
name: Savoia, Silvio
name: Galdi, Vincenzo
name: Alu', Andrea
name: Engheta, Nader
Publisher: name: arXiv
Year: 2012
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We extend the transformation-optics paradigm to a complex spatial coordinate domain, in order to deal with electromagnetic metamaterials characterized by balanced loss and gain, giving special emphasis to parity-time (PT) symmetric metamaterials. We apply this general theory to complex-source-point radiation and anisotropic transmission resonances, illustrating the capability and potentials of our approach in terms of systematic design, analytical modeling and physical insights into complex-coordinate wave-objects and resonant states.
description: 5 pages, 3 figures; minor revisions in the text; supplementary material available online
Zoë L. Devlin / Emma-Jayne Graham (Hrsg.), Death Embodied
Creators: name: Augstein, Melanie
Publisher: name: Germania : Anzeiger der Römisch-Germanischen Kommission des Deutschen Archäologischen Instituts
Year: 2019

description: Rezension zu: Zoë L. Devlin / Emma-Jayne Graham (Hrsg.), Death Embodied. Archaeological Approaches to the Treatment of the Corpse. Studies in Funerary Archaeology Band 9. Oxbow Books, Oxford 2015. ISBN 978-1-78297-943-2. 174 Seiten mit 28 s/w-Abbildungen und einigen Tabellen
description: Germania : Anzeiger der Römisch-Germanischen Kommission des Deutschen Archäologischen Instituts, Bd. 96 2018(2019)
CRC806-Database: Integrating Typo3 with GeoNode and CKAN
Creators: name: Willmes, Christian
name: Yasa Yener
name: Gilgenberg, Anton
name: Bareth, Georg
Publisher: name: CRC806-Database
Year: 2015

description: This Poster contribution for the 2nd Research Data Management Workshop, held on November 27th and 28th at the University of Cologne, describes the advancements of the new CRC806-Databse frontend. It was decided to update the system with some major changes to the overall architecture, by preserving the current API functionality and the URLs of the datasets in the database. This paper describes the system architecture of the upcoming version of the CRC806-Database. The SDI part of the system is migrated from the current MapServer, GeoServer, MapProxy and pyCSW based implementation to a GeoNode based system. Additionally the Typo3 based frontend of the web portal is changed to use mostly server side Extbase & Fluid based content handling and rendering, instead of the current AgularJS based frontend. Due to stability and consistency difficulties of client side rendering we decided to build a more robust system and move to server side rendering.
Quasihomogeneity of curves and the Jacobian endomorphism ring
Creators: name: Granger, Michel
name: Schulze, Mathias
Publisher: name: arXiv
Year: 2012
Subjects: subject: Algebraic Geometry (math.AG)
subject: Commutative Algebra (math.AC)
subject: FOS: Mathematics
subject: 14H20 (Primary), 13B22, 13H10 (Secondary)

description: We give a quasihomogeneity criterion for Gorenstein curves. For complete intersections, it is related to the first step of Vasconcelos' normalization algorithm. In the process, we give a simplified proof of the Kunz-Ruppert criterion.
description: 9 pages
Markus Walz (ed.), Handbuch Museum. Geschichte – Aufgaben – Perspektiven
Creators: name: Schöbel, Gunter
name: Aitken, Isabel
name: Hämmerle, Sandy
Publisher: name: Germania : Anzeiger der Römisch-Germanischen Kommission des Deutschen Archäologischen Instituts
Year: 2019

description: Rezension zu: Markus Walz (ed.), Handbuch Museum. Geschichte – Aufgaben – Perspektiven. J. B. Metzler, Stuttgart 2016. ISBN 978-3-476-02375-9. 417 pages, 13 figures and graphic illustrations
description: Germania : Anzeiger der Römisch-Germanischen Kommission des Deutschen Archäologischen Instituts, Bd. 96 2018(2019)
Lost in translations: A socio-technical study of interactive videoconferencing at an Australian university
Creators: name: Luck, Jo-Anne
Publisher: name: CQUniversity
Year: 2023
Subjects: classificationCode: 441007
subject: Sociology and social studies of science and technology
classificationCode: 390405
subject: Educational technology and computing
classificationCode: 390201
subject: Education policy

description: "This thesis examines the socio-technical interplay that occurred during and after the introduction of an information and communication technology (ICT) specifically, interactive videoconferencing (IVC) into a contemporary university. It investigates the work and negotiations that transpired as a vision for a new multi-campus model of teaching was translated into reality and the subsequent translations that occurred after implementation. Based on the methodological principles of actor-network theory (ANT), the research design uses qualitative data collection and analysis techniques. Documents and other artefacts were gathered; participant observation notes were taken; and individual and focus group interviews were undertaken. The data analysis strategy is a process of initial data categorisation, followed by the use of Callons (1986b) concept of the Sociology of Translation as an analytical lens to interrogate the work and negotiations around IVC that unfolded over a sixteen year period (19922008). The thesis conceptualises change as an open-ended process of translations. The translations are a consequence of socio-technical negotiations that occur when a new technology is introduced into an organisation. Actors in the socially and technically mediated networks become lost in the many translations that occur during the life of the technology. The research design developed in this study, where ANT is deployed conceptually, methodologically and analytically, offers a valuable approach to investigating the translations that occur during the implementation and maintenance of an ICT in a university setting. A significant finding is a process of reviewing and reproblematising the technological innovation after its implementation. This negates the potential for acts of dissidence to adversely affect the innovation and associated work practices." -- abstract
A nonstandard proof of continuity of affine varieties
Creators: name: Nathanson, Melvyn B.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Algebraic Geometry (math.AG)
subject: Logic (math.LO)
subject: FOS: Mathematics
subject: 03H05, 03H15, 11G35, 12D10, 12E05, 12L15

description: Extending the classical result that the roots of a polynomial with coefficients in $\mathbf{C}$ are continuous functions of the coefficients of the polynomial, nonstandard analysis is used to prove that if $\mathcal{F} = \{f_λ :λ\in Λ\}$ is a set of polynomials in $\mathbf{C}[t_1,\ldots, t_n]$ and if $^*\mathcal{G} = \{g_λ :λ\in Λ\}$ is a set of polynomials in $^*\mathbf{C}_0[t_1,\ldots, t_n]$ such that $g_λ$ is an infinitesimal deformation of $f_λ$ for all $λ\in Λ$, then the nonstandard affine variety $^*V_0(\mathcal{G})$ is an infinitesimal deformation of the affine variety $V(\mathcal{F})$.
description: 8 pages; minor corrections
Restoration of a Spontaneously Broken Symmetry in an Euclidean Quantum $λφ^{4}_{d+1}$ model with Quenched Disorder
Creators: name: Heymans, G. O.
name: Svaiter, N. F.
name: Krein, G.
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: We investigate the low temperature behavior of a system in a spontaneously broken symmetry phase described by an Euclidean quantum $λφ^{4}_{d+1}$ model with quenched disorder. Using a series representation for the averaged generating functional of connected correlation functions in terms of the moments of the partition function, we study the effects of the disorder linearly coupled to the scalar field. To deal with the strongly correlated disorder in imaginary time, we employthe equivalence between the model defined in a $d$-dimensional space with imaginary time with the statistical field theory model defined on a space ${\mathbb R}^{d}\times S^{1}$ with anisotropic quenched disorder. Next, using fractional derivatives and stochastic differential equations we obtain at tree-level the Fourier transform of the correlation functions of the disordered system. In one-loop approximation, we prove that there is a denumerable collection of moments of the partition function that can develop critical behavior. Below the critical temperature of the pure system, with the bulk in the ordered phase, there are a large number of critical temperatures that take each of these moments from an ordered to a disordered phase. We show the emergence of generic scale invariance in the system.
description: 14 pages, 2 figures
How ornithopters can perch autonomously on a branch
Creators: name: Zufferey, Raphael
name: Barbero, Jesus Tormo
name: Talegon, Daniel Feliu
name: Nekoo, Saeed Rafee
name: Acosta, Jose Angel
name: Ollero, Anibal
Publisher: name: arXiv
Year: 2022
Subjects: subject: Robotics (cs.RO)
subject: FOS: Computer and information sciences

description: Flapping wings are a bio-inspired method to produce lift and thrust in aerial robots, leading to quiet and efficient motion. The advantages of this technology are safety and maneuverability, and physical interaction with the environment, humans, and animals. However, to enable substantial applications, these robots must perch and land. Despite recent progress in the perching field, flapping-wing vehicles, or ornithopters, are to this day unable to stop their flight on a branch. In this paper, we present a novel method that defines a process to reliably and autonomously land an ornithopter on a branch. This method describes the joint operation of a flapping-flight controller, a close-range correction system and a passive claw appendage. Flight is handled by a triple pitch-yaw-altitude controller and integrated body electronics, permitting perching at 3 m/s. The close-range correction system, with fast optical branch sensing compensates for position misalignment when landing. This is complemented by a passive bistable claw design can lock and hold 2 Nm of torque, grasp within 25 ms and can re-open thanks to an integrated tendon actuation. The perching method is supplemented by a four-step experimental development process which optimizes for a successful design. We validate this method with a 700 g ornithopter and demonstrate the first autonomous perching flight of a flapping-wing robot on a branch, a result replicated with a second robot. This work paves the way towards the application of flapping-wing robots for long-range missions, bird observation, manipulation, and outdoor flight.