cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Complete set of quasi-conserved quantities for spinning particles around Kerr
Creators: name: Compère, Geoffrey
name: Druart, Adrien
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We revisit the conserved quantities of the Mathisson-Papapetrou-Tulczyjew equations describing the motion of spinning particles on a fixed background. Assuming Ricci-flatness and the existence of a Killing-Yano tensor, we demonstrate that besides the two non-trivial quasi-conserved quantities, i.e. conserved at linear order in the spin, found by Rüdiger, non-trivial quasi-conserved quantities are in one-to-one correspondence with non-trivial mixed-symmetry Killing tensors. We prove that no such stationary and axisymmetric mixed-symmetry Killing tensor exists on the Kerr geometry. We discuss the implications for the motion of spinning particles on Kerr spacetime where the quasi-constants of motion are shown not to be in complete involution.
description: Minor corrections and proof of triviality of all mixed-symmetry Killing tensor in Minkowski spacetime added
Harald Bruckert, Beschützer der Stadt bei Gott und in den Stürmen der Welt. Vergleichende Studien zur bischöflichen Herrschaft in Gallien und Italien im 4. und 5. Jahrhundert
Creators: name: Lambrecht, Ulrich
Publisher: name: Göttinger Forum für Altertumswissenschaft
Year: 2021

description: Rezension zu: Harald Bruckert, Beschützer der Stadt bei Gott und in den Stürmen der Welt. Vergleichende Studien zur bischöflichen Herrschaft in Gallien und Italien im 4. und 5. Jahrhundert. Studien zur Geschichtsforschung des Altertums 23. Hamburg: Verlag Dr. Kovač 2012, 558 S.
description: Göttinger Forum für Altertumswissenschaft, Bd. 16 (2013): Göttinger Forum für Altertumswissenschaft
Clustering instability in a freely falling granular jet
Creators: name: Möbius, Matthias E.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: This paper investigates a clustering instability of a freely falling granular jet composed of 100 micron glass spheres. The granular flow out of a circular nozzle starts out spatially uniform and then, further downstream, breaks up into well defined clusters. The role of air is investigated in this phenomenon by changing the ambient air pressure down to 1/5000th atm. An optical method is used that measures inhomogeneities in the flow in order to quantify the growth of the clusters. Clustering is observed down to the lowest pressure and the presence of air leads to larger drops but does not initiate the drop formation. The analysis shows that the drop size is set by fluctuations on the order of the size of the particles at the nozzle.
description: 10 pages, 12 figures, submitted to PRE
Constraints on chameleon gravity from the measurement of the electrostatic stiffness of the MICROSCOPE mission accelerometers
Creators: name: Pernot-Borràs, Martin
name: Bergé, Joël
name: Brax, Philippe
name: Uzan, Jean-Philippe
name: Métris, Gilles
name: Rodrigues, Manuel
name: Touboul, Pierre
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: This article is dedicated to the use the MICROSCOPE mission's data to test chameleon theory of gravity. We take advantage of the technical sessions aimed to characterize the electrostatic stiffness of MICROSCOPE's instrument intrinsic to its capacitive measurement system. Any discrepancy between the expected and measured stiffness may result from unaccounted-for contributors, i.e. extra-forces. This work considers the case of chameleon gravity as a possible contributor. It was previously shown that in situations similar to these measurement sessions, a chameleon fifth force appears and acts as a stiffness for small displacements. The magnitude of this new component of the stiffness is computed over the chameleon's parameter space. It allows us to derive constraints by excluding any force inconsistent with the MICROSCOPE data. As expected --since MICROSCOPE was not designed for the purpose of such an analysis--, these new bounds are not competitive with state-of-the-art constraints, but they could be improved by a better estimation of all effects at play in these sessions. Hence our work illustrates this novel technique as a new way of constraining fifth forces.
description: Submitted to PRD
Sandra K. Lucore – Monika Trümper (Hgg.), Greek Baths and Bathing Culture. New Discoveries and Approaches
Creators: name: Mania, Ulrich
Publisher: name: Göttinger Forum für Altertumswissenschaft
Year: 2021

description: Rezension zu: Sandra K. Lucore – Monika Trümper (Hgg.), Greek Baths and Bathing Culture. New Discoveries and Approaches. BABesch Suppl. 23. Löwen: Peeters Publishers 2013, VIII + 350 S.
description: Göttinger Forum für Altertumswissenschaft, Bd. 16 (2013): Göttinger Forum für Altertumswissenschaft
Renée Uccelini, L’arrivo di Achille a Sciro. Saggio di commento a Stazio 'Achilleide' 1,1-396
Creators: name: Jäger, Nils
Publisher: name: Göttinger Forum für Altertumswissenschaft
Year: 2021

description: Rezension zu: Renée Uccelini, L’arrivo di Achille a Sciro. Saggio di commento a Stazio 'Achilleide' 1,1-396. Pisa: Edizioni della Normale 2012, XXXIII + 288 S.
description: Göttinger Forum für Altertumswissenschaft, Bd. 16 (2013): Göttinger Forum für Altertumswissenschaft
A carbohydrate polymer is a critical variable in the formulation of drug nanocrystals: a case study of idebenone
Creators: name: Ma, Minchao
name: Zhang, Guangshuai
name: Li, Wen
name: Li, Mo
name: Fu, Qiang
name: He, Zhonggui
Publisher: name: Taylor & Francis
Year: 2019
Subjects: Biophysics
Biochemistry
Pharmacology
Cancer

description: Objective: Stabilizers, especially carbohydrate polymers, have been shown to be necessary for the stabilization of drug nanocrystals. However, the impacts of select stabilizers on the in vitro and in vivo efficacy of therapeutics have rarely been reported. The aim of this study was to evaluate the importance of stabilizers in the formulation of drug nanocrystals. Research design and methods: Idebenone nanocrystals (IDBNC) stabilized by various stabilizers were formulated using a milling method. The in vitro dissolution profiles in water and in situ absoprtion were compared. Finally, an in vivo pharmacokinetic study was performed. Results: The IDBNC profiles were found to have acceptable sizes and similar morphology and crystallinity. The dissolution profiles of IDBNC stabilized by different stabilizers were notably different, indicating the critical influence of stabilizers on the release rate of IDB. The Soluplus-stabilized IDBNC (IDBNC400 nm/Soluplus) achieved better absorption than HPMC stabilized IDBNC (IDBNC400 nm/HPMC). The pharmacokinetic study demonstrated that Soluplus-stabilized IDBNC had preferable kinetics, with an AUC0–24h of IDBNC400 nm/Soluplus (3.08-fold relative to IDB suspension), compared to IDBNC400 nm/HPMC (1.88-fold). Conclusions: Choice of stabilizer plays an important role in the formulation of IDBNC. We anticipate that the role of stabilizers in the pharmacokinetic disposition of IDBNC has significant implications for a wide range of other drug crystal formulations.
Towards a socio-technical understanding of police-citizen interactions
Creators: name: Zhang, Min
name: Bandara, Arosha K.
name: Philpot, Richard
name: Stuart, Avelie
name: Walkington, Zoe
name: Elphick, Camilla
name: Frumkin, Lara
name: Pike, Graham
name: Price, Blaine
name: Levine, Mark
name: Nuseibeh, Bashar
Publisher: name: University of Limerick
Year: 2024
Subjects: classificationCode: 40
subject: Engineering

description: The growing uptake of technology in policing provides the opportunity to revisit police-citizen interactions. This paper explores police-citizen interactions from a socio-technical systems perspective, drawing on community policing in the HCI literature, as well as the experience of both citizens and the police. For the latter, we report on a qualitative study with 29 participants including citizens, parish councillors, and police officers in England. Our findings use a socio-technical systems lens to highlight both social and technological challenges in police-citizen interactions, leading to several implications for practice and HCI design. These challenges include those arising from divergent viewpoints, power, and information imbalances between stakeholders, and technical systems that duplicate functionality or limit police-citizen interactions. Thus, our work contributes to extending HCI insights into the socio-technical infrastructure of policing contexts, and a better foundation for future research in the design and use of technologies to enhance community policing.
Acabonack Harbor Canoe Race Route Map with Markers
Creators: name: Springs Historical Society/Library
Publisher: name: Unknown
Year: 0
Subjects: Springs
East Hampton
Maps
Canoes
Regattas

description: This map shows the highlight route for the Great Bonac Canoe Race within Acabonack Harbor. There is a legend on the right hand side with color code that indicates the locations for the route, bouys, committee stations, and flag markers.
description: This material was lent to the Long Island Collection by the Springs Historical Society Library for digitization purposes.
U. Gehn, Ehrenstatuen in der Spätantike. Chlamydati und Togati
Creators: name: Leitmeir, Florian
Publisher: name: Göttinger Forum für Altertumswissenschaft
Year: 2021

description: Rezension zu: U. Gehn, Ehrenstatuen in der Spätantike. Chlamydati und Togati. Spätantike – Frühes Christentum – Byzanz, Kunst im ersten Jahrtausend – Reihe B, Bd. 34, Wiesbaden: Reichert Verlag 2012, 541 S., 46 s/w-Tafeln, 1 Farbtafel (zugl. Dissertation Berlin 2008)
description: Göttinger Forum für Altertumswissenschaft, Bd. 16 (2013): Göttinger Forum für Altertumswissenschaft
Dark QCD Matters
Creators: name: Garani, Raghuveer
name: Redi, Michele
name: Tesi, Andrea
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We investigate the nightmare scenario of dark sectors that are made of non-abelian gauge theories with fermions, gravitationally coupled to the Standard Model (SM). While testing these scenarios is experimentally challenging, they are strongly motivated by the accidental stability of dark baryons and pions, that explain the cosmological stability of dark matter (DM). We study the production of these sectors which are minimally populated through gravitational freeze-in, leading to a dark sector temperature much lower than the SM, or through inflaton decay, or renormalizable interactions producing warmer DM. Despite having only gravitational couplings with the SM these scenarios turn out to be rather predictive depending roughly on three parameters: the dark sector temperature, the confinement scale and the dark pion mass. In particular, when the initial temperature is comparable to the SM one these scenarios are very constrained by structure formation, $ΔN_{\rm eff}$ and limits on DM self-interactions. Dark sectors with same temperature or warmer than SM are typically excluded.
description: 34 pages, 3 figures. v2) gravity wave frequency from dark phase transition modified, refs added + minor changes
Dynamical renormalization group for mode-coupling field theories with solenoidal constraint
Creators: name: Cavagna, Andrea
name: di Carlo, Luca
name: Giardina, Irene
name: Grigera, Tomas S.
name: Pisegna, Giulia
name: Scandolo, Mattia
Publisher: name: arXiv
Year: 2021
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: The recent inflow of empirical data about the collective behaviour of strongly correlated biological systems has brought field theory and the renormalization group into the biophysical arena. Experiments on bird flocks and insect swarms show that social forces act on the particles' velocity through the generator of its rotations, namely the spin, indicating that mode-coupling field theories are necessary to reproduce the correct dynamical behaviour. Unfortunately, a theory for three coupled fields - density, velocity and spin - has a prohibitive degree of intricacy. A simplifying path consists in getting rid of density fluctuations by studying incompressible systems. This requires imposing a solenoidal constraint on the primary field, an unsolved problem even for equilibrium mode-coupling theories. Here, we perform an equilibrium dynamic renormalization group analysis of a mode-coupling field theory subject to a solenoidal constraint; using the classification of Halperin and Hohenberg, we can dub this case as a solenoidal Model G. We demonstrate that the constraint produces a new vertex that mixes static and dynamical coupling constants, and that this vertex is essential to grant the closure of the renormalization group structure and the consistency of dynamics with statics. Interestingly, although the solenoidal constraint leads to a modification of the static universality class, we find that it does not change the dynamical universality class, a result that seems to represent an exception to the general rule that dynamical universality classes are narrower than static ones. Our results constitute a solid stepping stone in the admittedly large chasm towards developing an off-equilibrium mode-coupling theory of biological groups.
Rate of Channel Hardening of Antenna Selection Diversity Schemes and Its Implication on Scheduling
Creators: name: Bai, Dongwoon
name: Mitran, Patrick
name: Ghassemzadeh, Saeed S.
name: Miller, Robert R.
name: Tarokh, Vahid
Publisher: name: arXiv
Year: 2007
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: For a multiple antenna system, we compute the asymptotic distribution of antenna selection gain when the transmitter selects the transmit antenna with the strongest channel. We use this to asymptotically estimate the underlying channel capacity distributions, and demonstrate that unlike multiple-input/multiple-output (MIMO) systems, the channel for antenna selection systems hardens at a slower rate, and thus a significant multiuser scheduling gain can exist - O(1/ log m) for channel selection as opposed to O(1/ sqrt{m}) for MIMO, where m is the number of transmit antennas. Additionally, even without this scheduling gain, it is demonstrated that transmit antenna selection systems outperform open loop MIMO systems in low signal-to-interference-plus-noise ratio (SINR) regimes, particularly for a small number of receive antennas. This may have some implications on wireless system design, because most of the users in modern wireless systems have low SINRs
description: 24 pages, 6 figures, 1table, Submitted to IEEE Transactions on Information Theory
Petra Linscheid, Frühbyzantinische textile Kopfbedeckungen. Typologie, Verbreitung, Chronologie und soziologischer Kontext nach Originalfunden
Creators: name: Angar, Mabi
Publisher: name: Göttinger Forum für Altertumswissenschaft
Year: 2021

description: Rezension zu: Petra Linscheid, Frühbyzantinische textile Kopfbedeckungen. Typologie, Verbreitung, Chronologie und soziologischer Kontext nach Originalfunden. Spätantike – Frühes Christentum – Byzanz Bd. 30. Wiesbaden: Reichert Verlag 2011, 368 S., 386 s/w-Abb., 20 farb. Abb., 71 Zeichnungen
description: Göttinger Forum für Altertumswissenschaft, Bd. 16 (2013): Göttinger Forum für Altertumswissenschaft
The "Supercritical Pile" GRB Model: Afterglows and GRB, XRR, XRF Unification
Creators: name: Kazanas, Demosthenes
name: Mastichiadis, Apostolos
name: Georganopoulos, Markos
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present the general notions and observational consequences of the "Supercritical Pile" GRB model; the fundamental feature of this model is a detailed process for the conversion of the energy stored in relativistic protons in the GRB Relativistic Blast Waves (RBW) into relativistic electrons and then into radiation. The conversion is effected through the $p γ\to p e^+e^-$ reaction, whose kinematic threshold is imprinted on the GRB spectra to provide a peak of their emitted luminosity at energy \Ep $\sim 1$ MeV in the lab frame. We extend this model to include, in addition to the (quasi--)thermal relativistic post-shock protons an accelerated component of power law form. This component guarantees the production of $e^+e^- -$pairs even after the RBW has slowed down to the point that its (quasi--)thermal protons cannot fulfill the threshold of the above reaction. We suggest that this last condition marks the transition from the prompt to the afterglow GRB phase. We also discuss conditions under which this transition is accompanied by a significant drop in the flux and could thus account for several puzzling, recent observations. Finally, we indicate that the same mechanism applied to the late stages of the GRB evolution leads to a decrease in \Ep $\propto Γ^2(t)\propto t^{-3/4}$, a feature amenable to future observational tests.
description: 8 pages, 4 figures
Jörn Lang, Mit Wissen geschmückt? Zur bildlichen Rezeption griechischer Dichter und Denker in der römischen Lebenswelt
Creators: name: Biedermann, David
Publisher: name: Göttinger Forum für Altertumswissenschaft
Year: 2021

description: Rezension zu: Jörn Lang, Mit Wissen geschmückt? Zur bildlichen Rezeption griechischer Dichter und Denker in der römischen Lebenswelt. Monumenta Artis Romanae 39. Wiesbaden: Reichert Verlag 2012, 278 S., 304 s/w-Abb., 13 farb. Abb., auf 52 s/w- und 2 Farbtafeln
description: Göttinger Forum für Altertumswissenschaft, Bd. 16 (2013): Göttinger Forum für Altertumswissenschaft
Multiband charge density wave exposed in a transition metal dichalcogenide
Creators: name: Pásztor, Árpád
name: Scarfato, Alessandro
name: Spera, Marcello
name: Flicker, Felix
name: Barreteau, Céline
name: Giannini, Enrico
name: van Wezel, Jasper
name: Renner, Christoph
Publisher: name: arXiv
Year: 2021
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: In the presence of multiple bands, well-known electronic instabilities may acquire new complexity. While multiband superconductivity is the subject of extensive studies, the possibility of multiband charge density waves (CDWs) has been largely ignored so far. Here, combining energy dependent scanning tunnelling microscopy (STM) topography with a simple model of the charge modulations and a self-consistent calculation of the CDW gap, we find evidence for a multiband CDW in 2H-NbSe$_2$. This CDW not only involves the opening of a gap on the inner band around the K-point, but also on the outer band. This leads to spatially out-of-phase charge modulations from electrons on these two bands, which we detect through a characteristic energy dependence of the CDW contrast in STM images.
Hilbert schemes of 8 points
Creators: name: Cartwright, Dustin A.
name: Erman, Daniel
name: Velasco, Mauricio
name: Viray, Bianca
Publisher: name: arXiv
Year: 2008
Subjects: subject: Algebraic Geometry (math.AG)
subject: Commutative Algebra (math.AC)
subject: FOS: Mathematics
subject: 14C05 (Primary) 13E10 (Secondary)

description: The Hilbert scheme H^d_n of n points in A^d contains an irreducible component R^d_n which generically represents n distinct points in A^d. We show that when n is at most 8, the Hilbert scheme H^d_n is reducible if and only if n = 8 and d >= 4. In the simplest case of reducibility, the component R^4_8 \subset H^4_8 is defined by a single explicit equation which serves as a criterion for deciding whether a given ideal is a limit of distinct points. To understand the components of the Hilbert scheme, we study the closed subschemes of H_n^d which parametrize those ideals which are homogeneous and have a fixed Hilbert function. These subschemes are a special case of multigraded Hilbert schemes, and we describe their components when the colength is at most 8. In particular, we show that the scheme corresponding to the Hilbert function (1,3,2,1) is the minimal reducible example.
description: 28 pages; Rewrote introduction and reorganized parts of the paper, some minor errors have been fixed
Nils Rücker, Ausonius an Paulinus von Nola. Textgeschichte und literarische Form der Briefgedichte 21 und 22 des Decimus Magnus Ausonius
Creators: name: Dräger, Paul
Publisher: name: Göttinger Forum für Altertumswissenschaft
Year: 2021

description: Rezension zu: Nils Rücker, Ausonius an Paulinus von Nola. Textgeschichte und literarische Form der Briefgedichte 21 und 22 des Decimus Magnus Ausonius. Hypomnemata, Bd. 190. Göttingen: Vandenhoeck & Ruprecht 2012, 376 S.
description: Göttinger Forum für Altertumswissenschaft, Bd. 16 (2013): Göttinger Forum für Altertumswissenschaft
Extrasolar planetary dynamics with a generalized planar Laplace-Lagrange secular theory
Creators: name: Veras, Dimitri
name: Armitage, Philip J.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The dynamical evolution of nearly half of the known extrasolar planets in multiple-planet systems may be dominated by secular perturbations. The commonly high eccentricities of the planetary orbits calls into question the utility of the traditional Laplace-Lagrange (LL) secular theory in analyses of the motion. We analytically generalize this theory to fourth-order in the eccentricities, compare the result with the second-order theory and octupole-level theory, and apply these theories to the likely secularly-dominated HD 12661, HD 168443, HD 38529 and Ups And multi-planet systems. The fourth-order scheme yields a multiply-branched criterion for maintaining apsidal libration, and implies that the apsidal rate of a small body is a function of its initial eccentricity, dependencies which are absent from the traditional theory. Numerical results indicate that the primary difference the second and fourth-order theories reveal is an alteration in secular periodicities, and to a smaller extent amplitudes of the planetary eccentricity variation. Comparison with numerical integrations indicates that the improvement afforded by the fourth-order theory over the second-order theory sometimes dwarfs the improvement needed to reproduce the actual dynamical evolution. We conclude that LL secular theory, to any order, generally represents a poor barometer for predicting secular dynamics in extrasolar planetary systems, but does embody a useful tool for extracting an accurate long-term dynamical description of systems with small bodies and/or near-circular orbits.
description: 14 pages, 12 figures, 1 table, accepted for publication in ApJ
Computational and Experimental Characterization of NF023, A Candidate Anticancer Compound Inhibiting cIAP2/TRAF2 Assembly
Creators: name: Cossu, Federica
name: Sorrentino, Luca
name: Fagnani, Elisa
name: Zaffaroni, Mattia
name: Milani, Mario
name: Giorgino, Toni
name: Mastrangelo, Eloise
Publisher: name: arXiv
Year: 2021
Subjects: subject: Biomolecules (q-bio.BM)
subject: FOS: Biological sciences

description: Protein-protein interactions are the basis of many important physiological processes and are currently promising, yet difficult, targets for drug discovery. In this context, inhibitor of apoptosis proteins (IAPs)-mediated interactions are pivotal for cancer cell survival; the interaction of the BIR1 domain of cIAP2 with TRAF2 was shown to lead the recruitment of cIAPs to the TNF receptor, promoting the activation of the NF-κB survival pathway. In this work, using a combined in silico-in vitro approach, we identified a drug-like molecule, NF023, able to disrupt cIAP2 interaction with TRAF2. We demonstrated in vitro its ability to interfere with the assembly of the cIAP2-BIR1/TRAF2 complex and performed a thorough characterization of the compound's mode of action through 248 parallel unbiased molecular dynamics simulations of 300 ns (totaling almost 75 μs of all-atom sampling), which identified multiple binding modes to the BIR1 domain of cIAP2 via clustering and ensemble docking. NF023 is, thus, a promising protein-protein interaction disruptor, representing a starting point to develop modulators of NF-κB-mediated cell survival in cancer. This study represents a model procedure that shows the use of large-scale molecular dynamics methods to typify promiscuous interactors.
Macroscopic Distinguishability Between Quantum States Defining Different Phases of Matter: Fidelity and the Uhlmann Geometric Phase
Creators: name: Paunkovic, Nikola
name: Vieira, Vitor Rocha
Publisher: name: arXiv
Year: 2007
Subjects: subject: Quantum Physics (quant-ph)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We study the fidelity approach to quantum phase transitions (QPTs) and apply it to general thermal phase transitions (PTs). We analyze two particular cases: the Stoner-Hubbard itinerant electron model of magnetism and the BCS theory of superconductivity. In both cases we show that the sudden drop of the mixed state fidelity marks the line of the phase transition. We conduct a detailed analysis of the general case of systems given by mutually commuting Hamiltonians, where the non-analyticity of the fidelity is directly related to the non-analyticity of the relevant response functions (susceptibility and heat capacity), for the case of symmetry-breaking transitions. Further, on the case of BCS theory of superconductivity, given by mutually non-commuting Hamiltonians, we analyze the structure of the system's eigenvectors in the vicinity of the line of the phase transition showing that their sudden change is quantified by the emergence of a generically non-trivial Uhlmann mixed state geometric phase.
description: 18 pages, 8 figures. Version to be published
title: Riding and remembrance: re-emplacement in a Canadian Forces Veterans motorcycle organization
Creators: name: Samuels, Karen Lynn
Publisher: name: Memorial University of Newfoundland
Year: 2020

description: This thesis explores the social processes of post-release dis-emplacement experienced by a community of Canadian Forces veterans who rode motorcycles together. Across a range of military experiences and careers, including dangerous overseas deployments and other international and domestic postings, veterans experience a profound sense of loss and isolation following their military release. In this thesis, I approach the military as a place. I contend that retirement from their military careers is a dis-emplacing experience for veterans, which severs them from their prior sense of military emplacement. For this group and other veterans, retirement from the military means veterans’ disconnection from familiar and empowering military lifeworlds, from a field of social relations that provide definitive narratives for self-identification, from predictable and regimented everyday activity, from a shared sense of purpose, and, from daily interaction with trusted individuals who were like family. I posit that veteran riding community members experienced grief as a result of the loss of their relationship with the military as a place. This thesis examines veterans’ release bereavement as one of three social processes that make up post-release dis-emplacement. Veterans additionally experienced as dis-emplacing the intrusion of military skills and habits into their post-release lives in civilian public and work places. Lastly, veterans experienced as dis-emplacing their struggles for improved acknowledgement and compensation–from the Government of Canada and from civilian Canadians–in exchange for risking their lives, bodies, and minds in military service to Canada. I argue that veteran riding community members learned to mitigate the wounding and sometimes harmful conditions of post-release dis-emplacement through their participation in a community of Canadian Forces veterans. As members of a community of Canadian Forces veterans, together, they rode motorcycles, raised money for other veterans and their families, and organized and took part in local remembrance events in attendance with civilians.
Natural Dark Matter from an Unnatural Higgs Boson and New Colored Particles at the TeV Scale
Creators: name: Pierce, Aaron
name: Thaler, Jesse
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The thermal relic abundance of Dark Matter motivates the existence of new electroweak scale particles, independent of naturalness considerations. However, most unnatural Dark Matter models do not ensure the presence of new particles charged under SU(3)_C, resulting in challenging LHC phenomenology. Here, we present a class of models with scalar electroweak doublet Dark Matter that require a host of colored particles at the TeV scale. In these models, the Higgs boson is apparently fine-tuned, but the Dark Matter doublet is kept light without any additional fine-tuning.
description: 1+22 pages, 5 figures. Added references. Minor clarifications
Peter Riedlberger, Domninus of Larissa. Encheiridion and spurious works. Introduction, critical text, English translation, and commentary
Creators: name: Brown, Peter G.
Publisher: name: Göttinger Forum für Altertumswissenschaft
Year: 2021

description: Rezension zu: Peter Riedlberger, Domninus of Larissa. Encheiridion and spurious works. Introduction, critical text, English translation, and commentary. Mathematica Graeca Antiqua Bd. 2. Pisa/Rom: Fabrizio Serra 2013, 279 S.
description: Göttinger Forum für Altertumswissenschaft, Bd. 16 (2013): Göttinger Forum für Altertumswissenschaft
Analytical investigation of pre-inflationary effects in the primordial power spectrum: From General Relativity to hybrid Loop Quantum Cosmology
Creators: name: Navascués, Beatriz Elizaga
name: Marugán, Guillermo A. Mena
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: This work is an analytical study of the main differences between classical inflationary effects of a fast-roll regime and imprints of hybrid Loop Quantum Cosmology (LQC) on the primordial power spectrum. Effective LQC solutions of phenomenological interest typically contain a classical period of kinetic dominance prior to slow-roll inflation, with consequences on the power spectrum that here we try and tell apart from those of phenomena occuring in the vicinity of a bounce in hybrid LQC. For this comparison, we use the same criterion for the choice of a vacuum state of the primordial perturbations, both in the context of relativistic cosmology and on the LQC cosmological background. As a first approximation to the problem, our study ignores the influence of a quasi-de Sitter evolution (rather than de Sitter) in the slow-roll inflationary regime, and of a typically short transition between the kinetically dominated era and the slow-roll period. Our results show that, while the two studied types of effects can lead to a drastic power suppression in the infrared sector of the spectrum, the mode scale at which this happens is much larger for LQC than for classical relativistic cosmology, the corresponding scales being related to the spacetime curvature at the bounce and at the onset of inflation, respectively.
description: This is the Accepted Manuscript version of an article accepted for publication in Journal of Cosmology and Astroparticle Physics. Neither SISSA Medialab Srl nor IOP Publishing Ltd is responsible for any errors or omissions in this version of the manuscript or any version derived from it. The Version of Record is available online at https://doi.org/10.1088/1475-7516/2021/09/030
Peter Riedlberger, Philologischer, historischer und liturgischer Kommentar zum 8. Buch der Johannis des Goripp nebst kritischer Edition und Übersetzung
Creators: name: Gärtner, Thomas
Publisher: name: Göttinger Forum für Altertumswissenschaft
Year: 2021

description: Rezension zu: Peter Riedlberger, Philologischer, historischer und liturgischer Kommentar zum 8. Buch der Johannis des Goripp nebst kritischer Edition und Übersetzung. Groningen: Egbert Forsten Publishing 2010, 503 S.
description: Göttinger Forum für Altertumswissenschaft, Bd. 16 (2013): Göttinger Forum für Altertumswissenschaft
A importância das universidades estaduais para o desenvolvimento local e regional no Estado da Bahia
Creators: name: Mota Júnior, Antônio de Macêdo
Publisher: name: figshare
Year: 2021
Subjects: subject: 130304 Educational Administration, Management and Leadership
subject: FOS: Educational sciences

description: Este trabalho aborda o tema da importância da educação superior para o desenvolvimento local e regional, no que diz respeito à inserção das Universidades Estaduais da Bahia (UEBA) no interior do território baiano. Esta pesquisa exploratório-descritiva, bibliográfica e documental tem o objetivo de contextualizar a origem e a importância das UEBA, abordando a contribuição dessa oferta pública de educação superior no interior baiano para o desenvolvimento local e regional do Estado. Os resultados demonstram que as UEBA podem ser consideradas grandes pontencializadoras no desenvolvimento local e regional do Estado da Bahia, principalmente em relação às localidades e adjacências onde se encontram inseridas, como formadoras de capital humano e da melhoria da qualidade de vida.
Late acceleration and $w=-1$ crossing in induced gravity
Creators: name: Apostolopoulos, Pantelis S.
name: Tetradis, Nikolaos
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Astrophysics (astro-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We study the cosmological evolution on a brane with induced gravity within a bulk with arbitrary matter content. We consider a Friedmann-Robertson-Walker brane, invariantly characterized by a six-dimensional group of isometries. We derive the effective Friedmann and Raychaudhuri equations. We show that the Hubble expansion rate on the brane depends on the covariantly defined integrated mass in the bulk, which determines the energy density of the generalized dark radiation. The Friedmann equation has two branches, distinguished by the two possible values of the parameter $\ex=\pm 1$. The branch with $\ex=1$ is characterized by an effective cosmological constant and accelerated expansion for low energy densities. Another remarkable feature is that the contribution from the generalized dark radiation appears with a negative sign. As a result, the presence of the bulk corresponds to an effective negative energy density on the brane, without violation of the weak energy condition. The transition from a period of domination of the matter energy density by non-relativistic brane matter to domination by the generalized dark radiation corresponds to a crossing of the phantom divide $w=-1$.
description: 7 pages, no figures, RevTex 4.0; (v2) new references are added, minor corrections and expanded discussion; (v3) additional comments at the end of section III, minor corrections and several new references are added, to match published version in Phys. Rev. D
Corrected Table for the Parametric Coefficients for the Optical Depth of the Universe to Gamma-rays at Various Redshifts
Creators: name: Stecker, F. W.
name: Malkan, M. A.
name: Scully, S. T.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Table 1 in our paper, ApJ 648, 774 (2006) entitled "Intergalactic Photon Spectra from the Far IR to the UV Lyman Limit for 0 < z < 6 and the Optical Depth of the Universe to High Energy Gamma-Rays" had erroneous numbers for the coefficients fitting the parametric form for the optical depth of the universe to gamma-rays. The correct values for these parameters as described in the original text are given here in a corrected table for various redshifts for the baseline model (upper row) and fast evolution (lower row) for each individual redshift. The parametric approximation is good for optical depths between 0.01 and 100 and for gamma-ray energies up to ~2 TeV for all redshifts but also for energies up to ~10 TeV for redshifts less than 1.
description: Table 1 corrected and new gamma-ray energy range of validity given
Gesture Recognition in Robotic Surgery: a Review
Creators: name: van Amsterdam, Beatrice
name: Clarkson, Matthew J.
name: Stoyanov, Danail
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Robotics (cs.RO)
subject: FOS: Computer and information sciences
subject: 68T40, 68T10, 68T07, 68T45

description: Objective: Surgical activity recognition is a fundamental step in computer-assisted interventions. This paper reviews the state-of-the-art in methods for automatic recognition of fine-grained gestures in robotic surgery focusing on recent data-driven approaches and outlines the open questions and future research directions. Methods: An article search was performed on 5 bibliographic databases with the following search terms: robotic, robot-assisted, JIGSAWS, surgery, surgical, gesture, fine-grained, surgeme, action, trajectory, segmentation, recognition, parsing. Selected articles were classified based on the level of supervision required for training and divided into different groups representing major frameworks for time series analysis and data modelling. Results: A total of 52 articles were reviewed. The research field is showing rapid expansion, with the majority of articles published in the last 4 years. Deep-learning-based temporal models with discriminative feature extraction and multi-modal data integration have demonstrated promising results on small surgical datasets. Currently, unsupervised methods perform significantly less well than the supervised approaches. Conclusion: The development of large and diverse open-source datasets of annotated demonstrations is essential for development and validation of robust solutions for surgical gesture recognition. While new strategies for discriminative feature extraction and knowledge transfer, or unsupervised and semi-supervised approaches, can mitigate the need for data and labels, they have not yet been demonstrated to achieve comparable performance. Important future research directions include detection and forecast of gesture-specific errors and anomalies. Significance: This paper is a comprehensive and structured analysis of surgical gesture recognition methods aiming to summarize the status of this rapidly evolving field.
description: in IEEE Transactions on Biomedical Engineering, 2021
Daniel Deerberg, Der Sturz des Judas. Kommentar (5,1-163) und Studien zur poetischen Erbauung bei Sedulius
Creators: name: Gärtner, Thomas
Publisher: name: Göttinger Forum für Altertumswissenschaft
Year: 2021

description: Rezension zu: Daniel Deerberg, Der Sturz des Judas. Kommentar (5,1-163) und Studien zur poetischen Erbauung bei Sedulius. Orbis Antiquus, Bd. 43. Münster: Aschendorff Verlag 2011, IX + 552 S.
description: Göttinger Forum für Altertumswissenschaft, Bd. 16 (2013): Göttinger Forum für Altertumswissenschaft
A surprising relation between double exchange and Heisenberg model spectra: Application to half-doped manganites
Creators: name: Bastardis, Roland
name: Guihery, Nathalie
name: Suaud, Nicolas
Publisher: name: arXiv
Year: 2006
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The Zener polarons recently found in half-doped manganites are usually seen as mixed valence entities ruled by a double exchange Hamiltonian involving only correlated electrons of the metals. They can however be considered as ferrimagnetic local units if the holes are localized on the bridging oxygen atoms as implicitely suggested by recent mean-field it ab initio calculations. In the latter case, the physics is ruled by a Heisenberg Hamiltonian involving magnetic oxygen bridges. This paper shows that the spectra resulting from the resolution of both models are analytically identical. This single resulting model spectrum accurately reproduces the spectrum of Zener polarons in Pr0.6Ca0.4MnO3 manganite studied by means of explicitely correlated ab initio calculations. Since the physics supported by each model are different, the analysis of the exact Hamiltonian ground state wave function should a priori enables one to determine the most appropriate model. It will be shown that neither the spectrum nor the wavefunction analysis bring any decisive arguments to settle the question. Such undecidability would probably be encountered in experimental information.
description: 4 pages, 2 figures
Karl-Ernst Georges, Der neue Georges. Ausführliches Handwörterbuch Lateinisch- Deutsch
Creators: name: Lindermann, Jens-Olaf
Publisher: name: Göttinger Forum für Altertumswissenschaft
Year: 2021

description: Rezension zu: Karl-Ernst Georges, Der neue Georges. Ausführliches Handwörterbuch Lateinisch- Deutsch. Bearbeitet von Thomas Baier, Redaktion Tobias Dänzer, mit einem neuen Vorwort von Thomas Baier, völlig neu bearb. auf d. Grundlage der 15. Aufl. (reprogr. Nachdr. der 8. Aufl. 1913/18). Darmstadt: Wissenschaftliche Buchgesellschaft 2013, 2 Bde., zus. 2368 S.
description: Göttinger Forum für Altertumswissenschaft, Bd. 16 (2013): Göttinger Forum für Altertumswissenschaft
A precise determination of alpha_s from LEP thrust data using effective field theory
Creators: name: Becher, Thomas
name: Schwartz, Matthew D.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Starting from a factorization theorem in Soft-Collinear Effective Theory, the thrust distribution in e+e- collisions is calculated including resummation of the next-to-next-to-next-to leading logarithms. This is a significant improvement over previous calculations which were only valid to next-to-leading logarithmic order. The fixed-order expansion of the resummed result approaches the exact fixed-order distribution towards the kinematic endpoint. This close agreement provides a verification of both the effective field theory expression and recently completed next-to-next-to-leading fixed order event shapes. The resummed distribution is then matched to fixed order, resulting in a distribution valid over a large range of thrust. A fit to ALEPH and OPAL data from LEP 1 and LEP 2 produces alpha_s(m_Z)= 0.1172 +/- 0.0010 +/- 0.0008 +/-0.0012 +/- 0.0012, where the uncertainties are respectively statistical, systematic, hadronic, and perturbative. This is one of the world's most precise extractions of alpha_s to date.
description: 37 pages, 12 figures; v2: hadronization discussion and appendices expanded
Magnetic field and thermal radiation induced entropy generation in a multiphase non-isothermal plane Poiseuille flow
Creators: name: Chaudhuri, Joydip
Publisher: name: arXiv
Year: 2021
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: The effect of radiative heat transfer on the entropy generation in a two-phase non-isothermal fluid flow between two infinite horizontal parallel plates under the influence of a constant pressure gradient and transverse non-invasive magnetic field have been explored. Both the fluids are considered to be viscous, incompressible, immiscible, Newtonian, and electrically conducting. The governing equations in Cartesian coordinate are solved analytically with the help of appropriate boundary conditions to obtain the velocity and temperature profile inside the channel. Application of transverse magnetic field is found to reduce the throughput and the temperature distribution of the fluids in a pressure-driven flow. The temperature and fluid flow inside the channel can also be non-invasively altered by tuning the magnetic field intensity, the temperature difference between the channel walls and the fluids, and several intrinsic fluid properties. The entropy generation due to the heat transfer, magnetic field, and fluid flow irreversibilities can be controlled by altering the Hartmann number, radiation parameter, Brinkmann number, filling ratio, and the ratios of fluid viscosities, thermal and electrical conductivities. The surfaces of the channel wall are found to act as a strong source of entropy generation and heat transfer irreversibility. The rate of heat transfer at the channel walls can also be tweaked by the magnetic field intensity, temperature differences, and fluid properties. The proposed strategies in the present study can be of significance in the design and development of gen-next microscale reactors, micro heat exchangers, and energy harvesting devices.
description: 19 Pages, 18 figures
Spitzer Limits On Dust Emission and Optical Gas Absorption Variability Around Nearby Stars with Edge-On Circumstellar Disk Signatures
Creators: name: Redfield, Seth
name: Kessler-Silacci, Jacqueline E.
name: Cieza, Lucas A.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present Spitzer observations and McDonald Observatory Smith Telescope and Anglo-Australian Telescope high spectral resolution optical observations of 4 nearby stars with variable or anomalous optical absorption, likely caused by circumstellar material. The optical observations of CaII and NaI cover a 2.8 year baseline, and extend the long term monitoring of these systems by previous researchers. In addition, mini-surveys of the local interstellar medium (LISM) around our primary targets provide a reconstruction of the intervening LISM along the line of sight. We confirm that the anomalous absorption detected toward alpha Oph is not due to circumstellar material, but to a small filamentary cloud <14.3 pc from the Sun. The three other primary targets, beta Car, HD85905, and HR10 show both short and long term variability, and little of the observed absorption can be attributed to the LISM along the line of sight. The Spitzer observations did not detect infrared excesses. We are able to place upper limits on any possible fractional infrared luminosity, which range from L_IR/L_star < 2-5 10^-6, for our three disk stars. No stable gas absorption component centered at the radial velocity of the star is detected for any of our targets. Based on simple assumptions of the variable gas absorption component, we estimate limits on the circumstellar gas mass causing the variable absorption, which range from 0.4-20 10^-8 M_Earth. These multiwavelength observations place strong limits on any possible circumstellar dust, while confirming variable circumstellar gas absorption, and therefore are interesting targets to explore the origins and evolution of variable circumstellar gas. (abridged)
description: 65 pages, 16 figures; Accepted for publication in ApJ
Heide Frielinghaus, Die Helme von Olympia. Ein Beitrag zu Waffenweihungen in griechischen Heiligtümern
Creators: name: Eder, Birgitta
Publisher: name: Göttinger Forum für Altertumswissenschaft
Year: 2021

description: Rezension zu: Heide Frielinghaus, Die Helme von Olympia. Ein Beitrag zu Waffenweihungen in griechischen Heiligtümern. Olympische Forschungen XXXIII. Berlin: De Gruyter 2011, XV + 599 S., 20 Abb., 131 s/w-Taf.
description: Göttinger Forum für Altertumswissenschaft, Bd. 16 (2013): Göttinger Forum für Altertumswissenschaft