cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
RGB-Depth Camera-Based Assessment of Motor Capacity: Normative Data for Six Standardized Motor Tasks
Creators: name: Röhling, Hanna Marie
name: Otte, Karen
name: Rekers, Sophia
name: Finke, Carsten
name: Rust, Rebekka
name: Dorsch, Eva-Maria
name: Behnia, Behnoush
name: Paul, Friedemann
name: Schmitz-Hübsch, Tanja
Publisher: name: Charité - Universitätsmedizin Berlin
Year: 2022
Subjects: subject: instrumental motion analysis
subject: normative data
subject: RGB-Depth camera
subject: Microsoft Kinect v2
subject: gait analysis
subject: tandem gait
subject: postural control
subject: stepping in place
subject: standing up and sitting down
subject: 600 Technik, Medizin, angewandte Wissenschaften::610 Medizin und Gesundheit::610 Medizin und Gesundheit

description: Background: Instrumental motion analysis constitutes a promising development in the assessment of motor function in clinical populations affected by movement disorders. To foster implementation and facilitate interpretation of respective outcomes, we aimed to establish normative data of healthy subjects for a markerless RGB-Depth camera-based motion analysis system and to illustrate their use. Methods: We recorded 133 healthy adults (56% female) aged 20 to 60 years with an RGB-Depth camera-based motion analysis system. Forty-three spatiotemporal parameters were extracted from six short, standardized motor tasks-including three gait tasks, stepping in place, standing-up and sitting down, and a postural control task. Associations with confounding factors, height, weight, age, and sex were modelled using a predictive linear regression approach. A z-score normalization approach was provided to improve usability of the data. Results: We reported descriptive statistics for each spatiotemporal parameter (mean, standard deviation, coefficient of variation, quartiles). Robust confounding associations emerged for step length and step width in comfortable speed gait only. Accessible normative data usage was lastly exemplified with recordings from one randomly selected individual with multiple sclerosis. Conclusion: We provided normative data for an RGB depth camera-based motion analysis system covering broad aspects of motor capacity.
Flavor Mixing in Gauge-Higgs Unification
Creators: name: Adachi, Yuki
name: Kurahashi, Nobuaki
name: Lim, C. S.
name: Maru, Nobuhito
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We discuss flavor mixing and resultant flavor changing neutral current processes in the SU(3) \otimes SU(3)_\text{color} gauge-Higgs unification scenario. To achieve flavor violation is a challenging issue in the scenario, since the Yukawa couplings are originally higher dimensional gauge interactions. We argue that the presence of Z_2-odd bulk masses of fermions plays a crucial role as the new source of flavor violation. Although introducing brane-localized mass terms in addition to the bulk masses is necessary to realize flavor mixing, if the bulk masses were universal among generations, the flavor mixing and flavor changing neutral current processes are known to disappear. We also discuss whether natural flavor conservation is realized in the scenario. It is shown that the new source of flavor violation leads to flavor changing neutral current processes at the tree level due to the exchange of non-zero Kaluza-Klein gauge bosons. As a typical example we calculate the rate of K^0 - \bar{K}^0 mixing due to the non-zero Kaluza-Klein gluon exchange at the tree level. The obtained result for the mass difference of neutral kaon is suppressed by the inverse powers of the compactification scale. By comparing our prediction with the data we obtain the lower bound of the compactification scale as a function of one unfixed parameter of the theory, which is of {\cal O}(10) TeV, except for some extreme cases. We argue that the reason to get such rather mild lower bound is the presence of "GIM-like" mechanism, which is a genuine feature of GHU scenario.
description: 20 pages, 5 eps files, discussion and numerical analysis under the general parameterization of flavor mixings added, minor changes for numerical calculation but results unchanged
Robust coherence and entanglement creation in trapped ions
Creators: name: Lishman, Jake
Publisher: name: Imperial College London
Year: 2022

description: Both entanglement and coherence are key resources for all applications of quantum technologies, from the well-known efforts to create a quantum computer, to research into thermodynamic work extraction. Trapped ions are one of the leading platforms for scalable quantum computing, as the site of many of the earliest quantum logic gates, and now boast the current highest-fidelity gates and longest coherence times of their qubits. This thesis presents three strands of work surrounding the creation, manipulation and verification of coherence and entanglement in trapped ions. Coherence is classified into differing ranks, to better represent the structure of multiple-component superpositions. A certifier for these different levels, analogous to an entanglement witness, is derived from a one-dimensional interference pattern in a generalisation of the Ramsey scheme. This metric cannot produce false positives for high-order coherence, even when the coherence basis cannot be measured directly. It requires significantly fewer experimental resources than alternate schemes that have been proposed, and a demonstration in the motional mode of a single trapped ion is presented, verifying that 3-coherence was created. The Mølmer–Sørensen Bell-state-creation gate in trapped ions is then examined, and its principal sources of frequency errors investigated. A multi-tone extension of the gate is presented, which is numerically optimised to make its entanglement generation robust against errors in the qubit and driving frequencies. This analysis produces a gate that is specifically optimised for the estimated error distributions of the target experiment. Finally, the same Mølmer–Sørensen gate is taken outside the weak-coupling approximation in which it has hitherto been confined. A new method of perturbative expansion is introduced and used to calculate functional constraints on the applied driving fields that can be satisfied to cancel unwanted non-linear terms from the dynamics order-by-order. This new strategy removes a previously fundamental limitation on the speed of trapped-ion entangling gates, and severely relaxes the cooling requirements on the motional modes.
On Hybrid (Topologically) Massive Supergravity in Three Dimensions
Creators: name: Lu, Hong
name: Pang, Yi
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: A class of hybrid (topologically) massive off-shell supergravities coupled to an on-shell matter scalar multiplet was recently constructed. The auxiliary field in the off-shell multiplet is dynamical for generic values of the eight parameters. We find that by choosing the parameters appropriately, it remains non-dynamical. We perform linearized analysis around the supersymmetric AdS3 vacuum and its Minkowski limit. The ghost-free condition for the Minkowski vacuum is explored. For the AdS3 vacuum, we obtain the criticality condition and find that at the critical points, one of the two massive gravitons becomes pure gauge and decouples from the bulk physics, whilst the other has positive energy. We demonstrate that the mass of the BTZ black hole is non-negative at the critical points. We also investigate general BPS solutions. For certain parameter choices, we obtain exact solutions. In particular, we present the BPS string (domain-wall) solution that is dual to certain two-dimensional quantum field theory with an ultra-violet conformal fixed point.
description: 29 pages. Typos corrected
title: Zweite Satzung zur Änderung der Prüfungsordnung für den Bachelorstudiengang Elektrotechnik der Fakultät für Elektrotechnik, Informatik und Mathematik an der Universität Paderborn
title: vom 12. November 2018
titleType: Subtitle
Creators: name: Universität Paderborn
Publisher: name: UB-PAD - Paderborn University Library
Year: 2018

description: Amtliche Mitteilungen / Universität Paderborn
Intelligent Differential Ion Mobility Spectrometry (iDMS): A Machine Learning Algorithm that Simplifies Optimization of Lipidomic Differential Ion Mobility Spectrometry Parameters
Creators: name: Shi, Xun Xun
Publisher: name: Université d'Ottawa / University of Ottawa
Year: 2021
Subjects: subject: Lipidomics
subject: Bioinformatics
subject: FOS: Computer and information sciences
subject: Machine Learning
subject: Metabolomics
subject: Digital Twin
subject: Neural Network

description: Glycosphingolipids such as α- and β-glucosylceramides (GlcCers) and α- and β- galactosylceramides (GalCers) are stereoisomers differentially synthesized by gut bacteria and their mammalian hosts in response to environmental insult. Thus, lipidomic assessment of α- and β-GlcCers and α- and β-GalCers is crucial for inferring biological functions and biomarker discovery. However, simultaneous quantification of these stereoisomeric lipids is difficult due to their virtually identical structures. Differential mobility mass spectrometry (DMS), as an orthogonal separation to high performance liquid chromatography used in electrospray ionization, tandem mass spectrometry (LC-ESI-MS/MS), can be used to separate stereoisomeric lipids. Generating LC-ESI-DMS-MS/MS methods for lipidomic analyses is exceedingly difficult demanding intensive manual optimization of DMS parameters that depend on the availability of synthetic lipid standards. Where synthetic standards do not exist, method development is not possible. To address this challenge, I developed a supervised in silico machine learning approach to accelerate method development for ion mobility-based quantification of lipid stereoisomers. I hypothesized that supervised neural network models could be used to learn the relationships between lipid structural characteristics and optimal DMS machine parameter values thereby reducing the total number of empirical experiments required to develop a DMS method and enabling users to “predict” DMS parameters for analytes that lack synthetic standards. Specifically, this thesis describes a supervised learning approach that learns the relationship between two DMS machine parameter values (separation voltage and compensation voltage) and two lipid structural features (N-Acyl chain length and degree of unsaturation). I describe here, iDMS, an algorithm that was trained on 17 lipid species, and can further simulate results of DMS manual method development and suggest optimal parameter values for 47 lipid species. This approach promises to greatly accelerate the development of assays for the detection of lipid stereoisomers in biological samples.
Ibn al-Mukhayem: esclusione e soggettività dei rifugiati palestinesi in Cisgiordania
Creators: name: Ferino, Mattia
Publisher: name: Medea
Year: 2020

description: ‘Il campo’ è un’eterogeneità di forme di alloggio/reclusione situate in contesti estremamente diversificati e gestiti da istituzioni dissimili tra loro. I campi sono un luogo caratteristico della modernità, eccedenza dell’ordine nazionale delle cose. Il campo e i suoi abitanti sono una chimera, materia viva che sfugge alla rappresentazione del reale in quanto razionale: in divenire fluido, attraversato dai corpi che lo plasmano ma luogo dove si vive in uno stato di liminalità per un tempo incerto. La domanda centrale che si pone il testo è quali siano le condizioni di vita del campo profughi in relazione al ‘fuori’. Attraverso un’etnografia comparata vengono tracciate alcune linee di continuità e discontinuità tra il ‘dentro’ e il ‘fuori’ dello spazio campo profughi in Cisgiordania, in relazione alle condizioni esistenziali legate alla terra, all’espropriazione e all’abitare entro le quali si articolano ed intersecano le possibilità dei discorsi, delle identità, delle tecniche, dei saperi e delle forme della politica.
description: Medea, Vol 6 No 1 (2020): Stato di liminalità
Stability conditions and canonical metrics
Creators: name: McCarthy, John Benjamin
Publisher: name: Imperial College London
Year: 2022

description: In this thesis we study the principle that extremal objects in differential geometry correspond to stable objects in algebraic geometry. In our introduction we survey the most famous instances of this principle with a view towards the results and background needed in the later chapters. In Part I we discuss the notion of a Z-critical metric recently introduced in joint work with Ruadhaí Dervan and Lars Martin Sektnan. We prove a correspondence for existence with an analogue of Bridgeland stability in the large volume limit, and study important properties of the subsolution condition away from this limit, including identifying the analogues of the Donaldson and Yang-Mills functionals for the equation. In Part II we study the recent theory of optimal symplectic connections on Kähler fibrations in the isotrivial case. We prove a correspondence with the existence of Hermite-Einstein metrics on holomorphic principal bundles.
A Dichotomy Theorem for the Approximate Counting of Complex-Weighted Bounded-Degree Boolean CSPs
Creators: name: Yamakami, Tomoyuki
Publisher: name: arXiv
Year: 2010
Subjects: subject: Computational Complexity (cs.CC)
subject: FOS: Computer and information sciences

description: We determine the computational complexity of approximately counting the total weight of variable assignments for every complex-weighted Boolean constraint satisfaction problem (or CSP) with any number of additional unary (i.e., arity 1) constraints, particularly, when degrees of input instances are bounded from above by a fixed constant. All degree-1 counting CSPs are obviously solvable in polynomial time. When the instance's degree is more than two, we present a dichotomy theorem that classifies all counting CSPs admitting free unary constraints into exactly two categories. This classification theorem extends, to complex-weighted problems, an earlier result on the approximation complexity of unweighted counting Boolean CSPs of bounded degree. The framework of the proof of our theorem is based on a theory of signature developed from Valiant's holographic algorithms that can efficiently solve seemingly intractable counting CSPs. Despite the use of arbitrary complex weight, our proof of the classification theorem is rather elementary and intuitive due to an extensive use of a novel notion of limited T-constructibility. For the remaining degree-2 problems, in contrast, they are as hard to approximate as Holant problems, which are a generalization of counting CSPs.
description: A4, 10pt, 20 pages. This revised version improves its preliminary version published under a slightly different title in the Proceedings of the 4th International Conference on Combinatorial Optimization and Applications (COCOA 2010), Lecture Notes in Computer Science, Springer, Vol.6508 (Part I), pp.285--299, Kailua-Kona, Hawaii, USA, December 18--20, 2010
Scene understanding for 3D multi-object scenes: labelling, reasoning and decomposing
Creators: name: Landgraf, Zoe
Publisher: name: Imperial College London
Year: 2022

description: Scene understanding is a crucial component for intelligent computer vision systems, which are an integral part of most robotic devices, including augmented reality glasses, autonomous cars and future household robots. With the tremendous progress computer vision methods have experienced since the introduction of machine learning and in particular, deep learning techniques to the field, intelligent vision systems seem to be within reach. Some successful applications such as face detection and augmentation have already found their way into our smartphones. However, many challenges remain unsolved, especially in the 3D domain. This thesis addresses three areas of 3D scene understanding with a focus on scenes composed of multiple small objects, which can pose particular challenges and are overall less explored. \textit{Labelling} In a first study, two common deep learning based methods to add semantic labels to a 3D reconstruction in real-time SLAM are compared and evaluated, providing valuable insights on the settings which favour one or the other approach. The experiments are conducted for a table-top setting of small objects and under the assumption, that a mobile device can extensively scan the scene. \textit{Reasoning} However, such an ideal setting is not always possible and the second challenge addressed in this thesis, is that of estimating the content of multi-object scenes when only one or few views are available. To this end, a novel, generative neural network architecture is proposed which can generate the full 3D shape and instance segmentation of a scene from a single depth image. \textit{Decomposing} The method proposed in the second study encodes all features jointly, which leaves no room for scene manipulation within the representation itself. The last experiments explore the question on how to best represent 3D scenes in a compositional way. Compositional, object-level encodings have several advantages including the control over individual features and objects within a scene, the ability to produce novel compositions, as well as a suitable structure to model interactions between scene components. To this end, a novel method to generate a factorised latent representation is proposed, which encodes a scene into a set of per-object latent codes. The proposed method is able to decompose a scene of convex shapes into its components, even from a single viewpoint. We hope that the research results of this thesis can provide insights for solving some of the open problems of 3D scene understanding and that the proposed solutions are relevant for future work and applications.
title: Satzung zur Änderung der Prüfungsordnung für den Masterstudiengang Electrical Systems Engineering der Fakultät für Elektrotechnik, Informatik und Mathematik an der Universität Paderborn
title: vom 12. November 2018
titleType: Subtitle
Creators: name: Universität Paderborn
Publisher: name: UB-PAD - Paderborn University Library
Year: 2018

description: Amtliche Mitteilungen / Universität Paderborn
Fundamental Formation mechanisms of the MAX phase Zr3AlC2 and small scale mechanical properties of the MAX phases
Creators: name: Lyons, Jack
Publisher: name: Imperial College London
Year: 2022

description: Herein we report the details of attempts to produce phase pure Zr3AlC2. Though previous methods have reportedly produced > 80% phase purity, through the addition of extra elements. It is not consistent with cases of samples containing as low as 4 % MAX phase content using the same method and elemental powders. It was determined through this work that the loss of aluminium through potential evaporation is one of the major causes of poor MAX phase yield. Therefore modifications to the heating regime were attempted to try and limit the rate of aluminium loss, so far this has guaranteed > 70% phase purity consistently. Phase composition was measured through XRD at different stages of heating and showed that there are key Zr-Al based intermetallics that form at lower temperatures (600-700 ◦C), suggesting that the reaction pathway does not involve carbon until higher temperatures. The production of phase pure material is desired so that the materials properties can be directly studied. Of particular interest is the relationship between structure and strain partitioning within the unit cell. This is complex to measure but Raman spectroscopy, is sensitive to even slight changes in bond lengths. Therefore it allows a potential method to measure these properties and has been explored here. It is possible to relate stresses in materials to peak shifts observed. The MAX phases show peaks representative of shear and vibrations along C, for both the M-A and M-X layers. Allowing for specific analysis of the strain in the individual layers. Investigations were performed on the MAX phase T i3SiC2 as a common MAX phase, with stress introduced through nano-indentation and compression. Currently this can only produce qualitative results, however, it shows a far greater peak shift for the M-X layers which was not expected as it is the less ductile of the two layers.
Leopardi in limba ‘e Logudoro
Creators: name: Irde, Gian Gavino
Publisher: name: Medea
Year: 2020

description: Due canti di Giacomo Leopardi, A se stesso e Canto notturno di un pastore errante dell'Asia, tradotti in logudorese.
description: Medea, Vol 6 No 1 (2020): Stato di liminalità
Novel approaches to study the design principles of turing patterns
Creators: name: Leyshon, Thomas J.
Publisher: name: Imperial College London
Year: 2021

description: A fundamental concern in biology is the origins of, and the mechanisms responsible for the structures and patterns observed within, organisms [1]. Turing patterns and the Turing mechanism may explain the processes behind biological pattern formation. Theoretical studies of the Turing mechanism show that it is highly sensitive to fluctuations and variations in kinetic parameters. Various experiments have shown that biochemical processes in living cells are inherently noisy systems, they are subjected to a diverse range of fluctuations. This ‘robustness problem’ raises the question of how such a seemingly sensitive mechanism could produce robust patterns amidst noise [2]. Recent computational advances allow for large-scale explorations of the design space of regulatory networks underpinning pattern production. Such explorations generate insights into the Turing mechanism’s robustness and sensitivity. Part 1 of the thesis performs a large-scale exploration within a discrete modelling framework, identifying the same pattern producing network types identified within previous studies. The equivalence we find across modelling frameworks suggests that a deeper underlying principle of these Turing mechanisms exist. In contrast to the continuous case , networks appear to be more robust in the discrete framework we explore here, suggesting that these networks might be more robust than previously thought. Part 2 of the thesis focuses on Turing patterns as a inverse problem: is it possible to infer the parameters that most likely produced a given pattern? Here, we distill the information of a pattern into a one-dimensional representation based on resistance distances, a concept from electrical networks [3]. We shown this representation to be robust against fluctuations in the pattern stemming from random initial conditions, or stochasticity of the model, and therefore permits the application of machine learning methods such as neural networks and support vector regression for parameter inference. We apply this method to infer one and three parameters for both deterministic and stochastic models of the Gierer-Meinhardt system. We show that the ’resistance distance histogram’ method is more robust to noise, and performs better for limited number of data samples than a vanilla convolutional neural network approach. Robustness of parameter inference with respect to noise and limited data samples is of particular importance when considering real experimental data. Overall, this thesis advances our understanding on the design principles of pattern formation, and provides insight into possible methods for inferring details of regulatory networks behind experimental evidence of Turing patterns.
Verhältnis von Bodentemperatur und Bodenfeuchte in einem renaturierten Augebiet
Creators: name: Krampl, Nicole
name: Lindenberger, Anna
Publisher: name: Zenodo
Year: 2025

description: This study investigates the correlation between soil moisture and soil temperature in a renaturalised floodplain, taking into account topographical and seasonal influences. The aim is to analyse the reciprocal relationships between the two parameters. The data, consisting of half-hourly measurements at two locations, were analysed using statistical methods such as the Pearson correlation coefficient and Convergent Cross Mapping (CCM). The results show a significant negative correlation between soil temperature and soil moisture. Temperature has a stronger influence on moisture than vice versa. The measurements show variations at the two measurement points; topography and vegetation have a decisive influence on moisture and temperature dynamics.The results provide valuable insights into the interactions between soil moisture and soil temperature in renaturalised floodplain areas and could contribute to the optimisation of renaturation measures.
description: Diese Arbeit untersucht die Korrelation zwischen Bodenfeuchte und Bodentemperatur in einem renaturierten Auengebiet unter Berücksichtigung topografischer und saisonaler Einflüsse. Ziel ist es, die wechselseitigen Beziehungen der beiden Parameter zu analysieren. Die Daten, bestehend aus halbstündlichen Messungen an zwei Standorten, wurden mit statistischen Methoden wie dem Pearson-Korrelationskoeffizienten und Convergent Cross Mapping (CCM) analysiert. Die Ergebnisse zeigen eine signifikante negative Korrelation zwischen Bodentemperatur und Bodenfeuchte. Die Temperatur beeinflusst die Feuchte stärker als umgekehrt. Die Messungen zeigen Variationen an den beiden Messpunkten, Topografie und Vegetation beeinflussen die Feuchte- und Temperaturdynamik entscheidend.Die Ergebnisse liefern wertvolle Erkenntnisse über die Wechselwirkungen zwischen Bodenfeuchte und Bodentemperatur in renaturierten Auengebieten und könnten zur Optimierung von Renaturierungsmaßnahmen beitragen.
Cos4Env system and user guide: a Cos4Cloud service training and capacity building resource
Creators: name: Ansine, Janice
name: Martínez de la Riva, Santiago
name: Parrilla, Marisol
name: Ribera, Robin Giles
Publisher: name: Zenodo
Year: 2023
Subjects: training resources
citizen observatories
services

description: This is a system and user guide to Cos4Env a service that integrates environmental observations from multiple citizen observatories saving time by providing easier access to a wide environmental data in one place. Cos4Env is one of the technological services developed in the Cos4Cloud project framework by Bineo Consulting. More information: https://cos4cloud-eosc.eu/cos4env/. This system and user guide is one of the Cos4Cloud Training and Capacity Building Resources developed by The Open University (OU), in collaboration with project partners, for the Cos4Cloud Toolbox & Evidence Hub. System and user guide designer: Harriett Cornish, OU. Contact: cos4cloud-toolbox@open.ac.uk
Angular Momentum Transfer in Vela-like Pulsar Glitches
Creators: name: Pizzochero, Pierre M.
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The angular momentum transfer associated to Vela-like glitches has never been calculated {\em directly} within a realistic scenario for the storage and release of superfluid vorticity; therefore, the explanation of giant glitches in terms of vortices has not yet been tested against observations. We present the first physically reasonable model, both at the microscopic and macroscopic level (spherical geometry, n=1 polytropic density profile, density-dependent pinning forces compatible with vortex rigidity), to determine where in the star the vorticity is pinned, how much of it, and for how long. For standard neutron star parameters ($M=1.4 M_{\odot}, R_s=10$ km, $\dotΩ=\dotΩ_{\rm Vela}=-10^{-10}$ Hz s$^{-1}$), we find that maximum pinning forces of order $f_m\approx10^{15}$ dyn cm$^{-1}$ can accumulate $ΔL_{\rm gl}\approx10^{40}$ erg s of superfluid angular momentum, and release it to the crust at intervals $Δt_{\rm gl}\approx3$ years. This estimate of $ΔL_{\rm gl}$ is one order of magnitude smaller than what implied indirectly by current models for post-glitch recovery, where the core and inner-crust vortices are taken as physically disconnected; yet, it successfully yields the magnitudes observed in recent Vela glitches for {\em both} jump parameters, $ΔΩ_{\rm gl}$ and $Δ\dotΩ_{\rm gl}$, provided one assumes that only a small fraction ($<10%$) of the total star vorticity is coupled to the crust on the short timescale of a glitch. This is reasonable in our approach, where no layer of normal matter exists between the core and the inner-crust, as indicated by existing microscopic calculation. The new scenario presented here is nonetheless compatible with current post-glitch models.
description: 11 pages, 4 figures
Dyson-Schwinger Equations with a Parameterized Metric
Creators: name: Yuan, Wei
name: Qin, Si-xue
name: Chen, Huan
name: Liu, Yu-xin
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We construct and solve the Dyson-Schwinger equation (DSE) of quark propagator with a parameterized metric, which connects the Euclidean metric with the Minkowskian one. We show, in some models, the Minkowskian vacuum is different from the Euclidean vacuum. The usual analytic continuation of Green function does not make sense in these cases. While with the algorithm we proposed and the quark-gluon vertex ansatz which preserves the Ward-Takahashi identity, the vacuum keeps being unchanged in the evolution of the metric. In this case, analytic continuation becomes meaningful and can be fully carried out.
description: 10 pages, 7 figures. To appear in Physical Review D
Un crocevia di generi e forme: il graphic novel di Gipi incontra la finzione post-apocalittica
Creators: name: Cannas, Andrea
Publisher: name: Medea
Year: 2020

description: La terra dei figli è un graphic-novel che incontra consapevolmente la finzione post-apocalittica: Gipi propone ai suoi lettori un racconto del mondo vergato oltre la fine del mondo, inserendosi in un ambito fra i più popolari degli ultimi decenni ‒ forse il genere letterario e cinematografico con la più spiccata tendenza a intrattenere con il pubblico un discorso “politico”. L’autore lo fa in modo originale, con gli strumenti tipici del fumetto, confrontandosi tuttavia con archetipi che non appartengono più solo alla finzione apocalittica, ma alla fiaba e al racconto di formazione.
description: Medea, Vol 6 No 1 (2020): Stato di liminalità
title: Zweite Satzung zur Änderung der Prüfungsordnung für den Masterstudiengang Elektrotechnik der Fakultät für Elektrotechnik, Informatik und Mathematik an der Universität Paderborn
title: vom 12. November 2018
titleType: Subtitle
Creators: name: Universität Paderborn
Publisher: name: UB-PAD - Paderborn University Library
Year: 2018

description: Amtliche Mitteilungen / Universität Paderborn
Too Masculine for words. Masculinity and Leadership in post-apartheid South Africa
Creators: name: Ortu, Claudia
Publisher: name: Medea
Year: 2020

description: The article looks at the relationship between masculinities and power in post-apartheid South Africa through the lenses of social semiotics. The way in which former President of the Republic of South Africa Jacob Zuma construed and performed his own masculinity throughout his period in office will be contrasted with the criticism of his behaviour in editorial cartoons and paintings.
description: Medea, Vol 6 No 1 (2020): Stato di liminalità
Scattering by coupled resonating elements in air
Creators: name: Krynkin, Anton
name: Umnova, Olga
name: Chong, Alvin Y. B.
name: Taherzadeh, Shahram
name: Attenborough, Keith
Publisher: name: arXiv
Year: 2011
Subjects: subject: Mathematical Physics (math-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Scattering by (a) a single composite scatterer consisting of a concentric arrangement of an outer N-slit rigid cylinder and an inner cylinder which is either rigid or in the form of a thin elastic shell and (b) by a finite periodic array of these scatterers in air has been investigated analytically and through laboratory experiments. The composite scatterer forms a system of coupled resonators and gives rise to multiple low frequency resonances. The corresponding analytical model employs polar angle dependent boundary conditions on the surface of the N-slit cylinder. The solution inside the slits assumes plane waves. It is shown also that in the low-frequency range the N-slit rigid cylinder can be replaced by an equivalent fluid layer. Further approximations suggest a simple square root dependence of the resonant frequencies on the number of slits and this is confirmed by data. The observed resonant phenomena are associated with Helmholtz-like behaviour of the resonator for which the radius and width of the openings are much smaller than the wavelength. The problem of scattering by a finite periodic array of such coupled resonators in air is solved using multiple scattering techniques. The resulting model predicts band-gap effects resulting from the resonances of the individual composite scatterers below the first Bragg frequency . Predictions and data confirm that use of coupled resonators results in substantial insertion loss peaks related to the resonances within the concentric configuration. In addition, for both scattering problems experimental data, predictions of the analytical approach and predictions of the equivalent fluid layer approximations are compared in the low-frequency interval.
Franke, Wolfgang: Nutzpflanzenkunde. Nutzbare Gewächse der gemässigten Breiten, Subtropen und Tropen.
Creators: name: Bockemühl, Jochen
Publisher: name: Naturwissenschaftliche Sektion am Goetheanum, Elemente der
 Naturwissenschaft
Year: 1977

description: Wer eine kurze und gute, weltweite Übersicht über die vom Menschen für Ernährung, Genuss oder technische Zwecke genutzten Pflanzen sucht, kann nach diesem Büchlein greifen. [...]
description: Wer eine kurze und gute, weltweite Übersicht über die vom Menschen für Ernährung, Genuss oder technische Zwecke genutzten Pflanzen sucht, kann nach diesem Büchlein greifen. [...]
description: Elemente der Naturwissenschaft 27, p. 50-50.
Tra mura reali e confini immaginari: l’isola di Leros nella poetica di Simona Vinci
Creators: name: Cardia, Cristina
Publisher: name: Medea
Year: 2020

description: In una fase storica nella quale sembra che i Paesi europei si impegnino a mettere un punto alle tragedie che decenni addietro si sono consumate nei manicomi, La prima verità di Simona Vinci invita a non dimenticare quanto accaduto in passato e analizza con lucida oggettività i nuovi mali che consumano il mondo moderno.
description: Medea, Vol 6 No 1 (2020): Stato di liminalità
Value creation from internalizing non-technical risks in projects : mining sector case
Creators: name: De Mello, Livia Barros Figueira
Publisher: name: University of British Columbia
Year: 2020

description: The mining sector faces both technical and non-technical risks (NTRs). Technical risks are defined as engineering-related risks whereas NTRs emerge primarily due to inadequate management of social and environmental issues. Research shows that mining projects are mostly designed with a focus on technical risks. This is surprising because there is evidence that the main causes of project capital overruns and delays arise from the less tangible non-technical risks, either real or perceived,. Furthermore, industry surveys in both 2019 and 2020 have identified social license to operate as the number one business risk facing the mining sector. Through direct engagement with industry practitioners, this thesis investigates differences in perceptions about the definition of NTRs, considers the extent to which NTRs are currently integrated into project assessments and identifies reasons for the neglect or undervaluation of NTRs in global mining projects. The research is informed by primary data collection in accordance with the grounded theory approach, which was employed for the study design. An exploratory and qualitative approach is adopted, comprising of semi-structured interviews with 20 professionals working for mining companies who are recognized as leading players in sustainable development performance. The research focus is fine-tuned from “infrastructure projects” to “large capital projects” to “mining” to “ESG leaders” to “project stage” (pre-feasibility stage). NTRs are currently undervalued in the decision-making processes of major mining companies. This is concerning. It suggests that projects assessments are not undergoing a complete risk analysis because projects are designed with a focus on mitigating “risks to the project” instead of “risks to people”. Project professionals demonstrate high motivation to integrate NTR into projects appraisals, but they face disincentives from corporate short-termism perspectives, decision bias, lack of expertise and miscommunications across departments. Structurally, Chapter one provides an introduction, Chapter Two discusses the main findings of the literature review, Chapter Three explains the research design and methodology, and Chapter Four presents the research results, Chapter Five discusses and analyzes key data outcomes, and Chapter Six identifies recommendations for decision-makers, and notes both academic contributions and opportunities for future research.
title: Obstructed biliopancreatic limb: A worrisome late complication of biliopancreatic diversion
Creators: name: Qamar, Adeel
Publisher: name: EURORAD
Year: 2022
Subjects: subject: Abdominal imaging
subject: Abdomen
subject: CT
subject: Clinical Cases

description: Clinical History: A 47-year-old male presented with severe diffuse abdominal pain more centred at central region that gradually progressed over a period of one week. On examination, the abdomen was tender and rigid. Laboratory tests revealed leukocytosis and elevated liver and pancreatic enzymes. Patient gave history of bariatric surgery 10 years ago.

description: 47 years, male
Consistent Scenarios for Cosmic-Ray Excesses from Sommerfeld-Enhanced Dark Matter Annihilation
Creators: name: Finkbeiner, Douglas P.
name: Goodenough, Lisa
name: Slatyer, Tracy R.
name: Vogelsberger, Mark
name: Weiner, Neal
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Anomalies in direct and indirect detection have motivated models of dark matter consisting of a multiplet of nearly-degenerate states, coupled by a new GeV-scale interaction. We perform a careful analysis of the thermal freezeout of dark matter annihilation in such a scenario. We compute the range of "boost factors" arising from Sommerfeld enhancement in the local halo for models which produce the correct relic density, and show the effect of including constraints on the saturated enhancement from the cosmic microwave background (CMB). We find that boost factors from Sommerfeld enhancement of up to ~800 are possible in the local halo. When the CMB bounds on the saturated enhancement are applied, the maximal boost factor is reduced to ~400 for 1-2 TeV dark matter and sub-GeV force carriers, but remains large enough to explain the observed Fermi and PAMELA electronic signals. We describe regions in the DM mass-boost factor plane where the cosmic ray data is well fit for a range of final states, and show that Sommerfeld enhancement alone is enough to provide the large annihilation cross sections required to fit the data, although for light mediator masses (less than ~200 MeV) there is tension with the CMB constraints in the absence of astrophysical boost factors from substructure. Additionally, we consider the circumstances under which WIMPonium formation is relevant and find for heavy WIMPs (greater than ~2 TeV) and soft-spectrum annihilation channels it can be an important consideration; we find regions with dark matter mass greater than 2.8 TeV that are consistent with the CMB bounds and have ~600-700 present-day boost factors.
description: Related web application at http://astrometry.fas.harvard.edu/mvogelsb/sommerfeld . v2: added brief clarification regarding propagation parameters, plots now show effect of relaxing CMB bounds. 35 pages in JCAP format, 4 figures. Accepted for publication in JCAP
Esperienze musicali nel Circo Paniko
Creators: name: Pisu, Giulia
name: Coni, Irene
Publisher: name: Medea
Year: 2020

description: Il progetto di ricerca sulla musica nel circo contemporaneo, con un focus sul Circo Paniko, nasce nel 2018 quando il collettivo nomade approda a Cagliari. Tale ricerca ha seguito la metodologia della ricerca sul campo di stampo etnomusicologico, utilizzando la registrazione audiovisiva e successivamente la stesura di un articolo col fine di comprendere il modo attraverso il quale la compagnia sviluppa le proprie creazioni artistiche - con particolare interesse alla sfera musicale - di indagare sull’esistenza di uno o più stili musicali loro caratteristici e per analizzare la performance nel suo intero come evento collettivo e condiviso. Quest’ultima è stata scomposta tramite l’analisi frame by frame di un numero di danza aerea sui tessuti presente sia all’interno del Cabaret rappresentato a Cagliari (2018/2019), sia in Panikyuuri, messo in scena ad Assemini (2019/2020).
description: Medea, Vol 6 No 1 (2020): Stato di liminalità
Otto Prokop und Wolf Wimmer: Wünschelrute, Erdstrahlen, Radiästesie. Die okkulten Strahlenfühligkeitslehren im Lichte der Wissenschaft.
Creators: name: Maier, Georg
Publisher: name: Naturwissenschaftliche Sektion am Goetheanum, Elemente der
 Naturwissenschaft
Year: 1985

description: Wie im Titel schon angetönt, spricht hier die Wissenschaft noch im Vollgefühl der Autorität, welche sie im vorigen Jahrhundert eher noch als heute besaß. Und aus dieser Position, nämlich der vermeintlichen Überlegenheit, wird das gesamte Feld eindeutig als Schwindel «entlarvt». Sieht man vom nicht mehr zeitgemäßen Ton ab, so ist in dem Taschenbuch eine Fülle von Material zur Geschichte der Rutengängerei durchaus beachtenswert. Auch wird der Versuch gemacht, dem Zustandekommen der Anzeige nachzugehen. Der Band kann heute als «Gegengewicht» gegenüber der überall anzutreffenden, arglosen Anwendung von «Entstörungssystemen» dienen. [...]
description: Wie im Titel schon angetönt, spricht hier die Wissenschaft noch im Vollgefühl der Autorität, welche sie im vorigen Jahrhundert eher noch als heute besaß. Und aus dieser Position, nämlich der vermeintlichen Überlegenheit, wird das gesamte Feld eindeutig als Schwindel «entlarvt». Sieht man vom nicht mehr zeitgemäßen Ton ab, so ist in dem Taschenbuch eine Fülle von Material zur Geschichte der Rutengängerei durchaus beachtenswert. Auch wird der Versuch gemacht, dem Zustandekommen der Anzeige nachzugehen. Der Band kann heute als «Gegengewicht» gegenüber der überall anzutreffenden, arglosen Anwendung von «Entstörungssystemen» dienen. [...]
description: Elemente der Naturwissenschaft 43, p. 68-68.
Topological Phases of One-Dimensional Fermions: An Entanglement Point of View
Creators: name: Turner, Ari M.
name: Pollmann, Frank
name: Berg, Erez
Publisher: name: arXiv
Year: 2010
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The effect of interactions on topological insulators and superconductors remains, to a large extent, an open problem. Here, we describe a framework for classifying phases of one-dimensional interacting fermions, focusing on spinless fermions with time-reversal symmetry and particle number parity conservation, using concepts of entanglement. In agreement with an example presented by Fidkowski \emph{et. al.} (Phys. Rev. B 81, 134509 (2010)), we find that in the presence of interactions there are only eight distinct phases, which obey a $\mathbb{Z}_8$ group structure. This is in contrast to the $\mathbb{Z}$ classification in the non-interacting case. Each of these eight phases is characterized by a unique set of bulk invariants, related to the transformation laws of its entanglement (Schmidt) eigenstates under symmetry operations, and has a characteristic degeneracy of its entanglement levels. If translational symmetry is present, the number of distinct phases increases to 16.
description: 12 pages, 1 figure; journal ref. added
Extreme non-linear response of ultra-narrow optical transitions in cavity QED for laser stabilization
Creators: name: Martin, M. J.
name: Meiser, D.
name: Thomsen, J. W.
name: Ye, Jun
name: Holland, M. J.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Quantum Physics (quant-ph)
subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: We explore the potential of direct spectroscopy of ultra-narrow optical transitions of atoms localized in an optical cavity. In contrast to stabilization against a reference cavity, which is the approach currently used for the most highly stabilized lasers, stabilization against an atomic transition does not suffer from Brownian thermal noise. Spectroscopy of ultra-narrow optical transitions in a cavity operates in a very highly saturated regime in which non-linear effects such as bistability play an important role. From the universal behavior of the Jaynes-Cummings model with dissipation, we derive the fundamental limits for laser stabilization using direct spectroscopy of ultra-narrow atomic lines. We find that with current lattice clock experiments, laser linewidths of about 1 mHz can be achieved in principle, and the ultimate limitations of this technique are at the 1 $μ$ Hz level.
description: 5 pages, 4 figures
Learning sparse representations of depth
Creators: name: Tosic, Ivana
name: Olshausen, Bruno A.
name: Culpepper, Benjamin J.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: This paper introduces a new method for learning and inferring sparse representations of depth (disparity) maps. The proposed algorithm relaxes the usual assumption of the stationary noise model in sparse coding. This enables learning from data corrupted with spatially varying noise or uncertainty, typically obtained by laser range scanners or structured light depth cameras. Sparse representations are learned from the Middlebury database disparity maps and then exploited in a two-layer graphical model for inferring depth from stereo, by including a sparsity prior on the learned features. Since they capture higher-order dependencies in the depth structure, these priors can complement smoothness priors commonly used in depth inference based on Markov Random Field (MRF) models. Inference on the proposed graph is achieved using an alternating iterative optimization technique, where the first layer is solved using an existing MRF-based stereo matching algorithm, then held fixed as the second layer is solved using the proposed non-stationary sparse coding algorithm. This leads to a general method for improving solutions of state of the art MRF-based depth estimation algorithms. Our experimental results first show that depth inference using learned representations leads to state of the art denoising of depth maps obtained from laser range scanners and a time of flight camera. Furthermore, we show that adding sparse priors improves the results of two depth estimation methods: the classical graph cut algorithm by Boykov et al. and the more recent algorithm of Woodford et al.
description: 12 pages
«Fascismo antico». Alcune note a margine di una conferenza salernitana di Emanuele Ciaceri
Creators: name: Giuman, Marco
Publisher: name: Medea
Year: 2020

description: Nel 1933, nel corso di una conferenza prolusa presso l’Istituto fascista di cultura di Salerno, Emanuele Ciaceri, professore di Storia Antica presso l’Università degli Studi di Napoli, propone un singolare raffronto tra Pitagorismo e Fascismo, ipotizzando che i pitagorici potessero aver costituito una forma antesignana del movimento mussoliniano.
description: Medea, Vol 6 No 1 (2020): Stato di liminalità