cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Retrofitting for resilience: A multi-hazard approach
Creators: name: Shamout, Sameh
name: Boarin, Paola
name: Sandeeka Mannakkara
Publisher: name: The University of Auckland
Year: 2021
Subjects: subject: 120101 Architectural Design
subject: FOS: Arts (arts, history of arts, performing arts, music)
subject: 120104 Architectural Science and Technology (incl. Acoustics, Lighting, Structure and Ecologically Sustainable Design)
subject: FOS: Civil engineering

description: This item is part of: Boarin, P., Haarhoff, E., Manfredini, M., Mohammadzadeh, M., Premier, A., (2021). Rethinking Sustainable Pacific Rim Territories. Proceedings of the 2020 APRU Sustainable Cities and Landscapes Hub PhD Symposium, Future Cities Research Hub, School of Architecture and Planning of the University of Auckland. ISBN: 978-0-473-53616-9
ABSTRACTResilience has received increased attention in urban-related research, policies and practice in recent years. Many urban development-related international initiatives have been established, such as the Making Cities Resilient Campaign and 100 Resilient Cities Programme, aiming to assist governments in enhancing urban resilience. Although the building stock is a significant component of the built environment, little work has been done on the scale of buildings compared to the work developed for the city scale. Resilient buildings can deliver their functions in the face of stresses and shocks, which are the converse of buildings that are vulnerable to the city's weaknesses and hazards. Enhancing the resilience of buildings boosts the urban fabric's resilience at a larger scale. This paper discusses what defines resilient buildings, focusing on existing building retrofits as it offers great opportunity to enhance the resilience of the built environment on a larger scale. It establishes a comprehensive understanding of resilience in buildings that consider both stresses and shocks threatening the built environment. Since resilience is a context-specific approach, the study also takes Jordan as an example and identifies the resilience challenges of its buildings according to 200 local professionals' perception who responded to an online questionnaire.
Aggregation and the energetics of the barnacle Balanus glandula Darwin
Creators: name: Wu, Shiu-Sun
Publisher: name: University of British Columbia
Year: 2010

description: Barnacles (Balanus glandula) were allowed to settle in 5 pre-determined patterns with an increasing degree of aggregation (i. e. isolated individuals, paired individuals, 9 individuals in a group, 81 individuals in a group and 'crowded' individuals with number > 12295 m⁻²). The energy budget:-C = P.BT. + P.E. + H.AQ. + R.AER. + M + F (Where :- C=Consumption, P.BT.=Production of body tissue, P.E.=Production of egg, R.AQ.=Aquatic respiration, R.AER.=Aerial respiration, H=Molting, F=Faecal production) was constructed for barnacle individuals for the first year settlement of each of the above 5 patterns. All the budget items on the right hand side of the equation were measured and consumption was found by their summation. Laboratory feeding experiments showed that consumption values derived from the summation method balanced closely with those obtained from feeding experiments. B. glandula had a very high assimilation efficiency (91.8 to 99.4 %) but a low gross production efficiency (22.8 to 26.4 %) and net production efficiency (24.7 to 28.6 %). A large proportion of energy intake (64.8 to 67.7 J) was lost in respiration. The second most important budget item was egg production (12.3 to 15.3 %); followed in decreasing order by shell production (6.1 to 7.2 %) > body tissue production (3.9 to 4.6 %) > molting (1.1 to 2.3 %). Aggregation significantly reduces the consumption, assimilation, production, as well as the energy standing crop of body tissue, egg and shell of an individual barnacle. Among these, egg production appears to be most sensitive to crowding. When comparing the egg: body tissue ratio and shell: tissue ratio between crowded and uncrowded individual barnacles, a decrease in degree of crowding was associated with: (1) an increase in the egg: body tissue ratio and (2) a decrease in shell: tissue ratio of the individuals. This appears to suggest a difference in energy partition in the barnacles with different degrees of crowding. Uncrowded individuals acquiring an adequate amount of energy, could afford to channel more energy into egg output and hence produce more progeny. On the other hand, crowded individuals acquire a limited amount of energy and apparently conserve a larger proportion of their energy in (1) building body tissue rather than egg and (2) building a taller shell so as to increase the general feeding area of the population. Finally, the energetics of a natural barnacle (B. glandula) population was studied. The consumption, energy flow (assimilation) , production and mortality were found to be : 6844.9, 6666.6 , 2897.1 and 2518.1 Kcal m⁻² yr⁻¹, respectively. The energy flow and production values are among the highest when compared with that of other animal populations and therefore strongly suggest the functional importance of B. glandula in the littoral system. The young age groups (< 1 year settlements) were most important in contributing to the population energy flow and production .
Influence of hyperon-hyperon interaction on the properties of neutron stars
Creators: name: Aguirre, R. M.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Nuclear Theory (nucl-th)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The properties of neutron stars are studied in a composite model of the strong interaction. In the regime of low to medium baryonic densities a covariant hadronic model is adopted which includes an exclusive channel for the hyperon-hyperon interaction mediated by hidden strangeness mesons, which in turn couple to other mesons through polynomial vertices. The new coupling constants are subject to phenomenological constraints. The presence of free quarks in the core of the star is considered by using the Nambu-Jona Lasinio model supplemented with a vector interaction. The deconfinement process is described by a continuous coexistence of phases. Several structure parameters of neutron stars, such as mass-radius relation, moment of inertia, tidal deformability, and the propagation of nonradial f and g-modes within the relativistic Cowling approximation are studied. The predictions of the model are in good agreement with recent observational data, in particular the maximum inertial mass is greater than the observational lower limit of two solar masses.
description: Accepted for publication in Journal of Physics G. The present version matches the accepted for publication manuscript. The title has been changed. This Accepted Manuscript is available for reuse under a CC BY-NC-ND licence after the 12 month embargo period provided that all the terms and conditions of the licence are adhered to
Unfrustrated Qudit Chains and their Ground States
Creators: name: Movassagh, Ramis
name: Farhi, Edward
name: Goldstone, Jeffrey
name: Nagaj, Daniel
name: Osborne, Tobias J.
name: Shor, Peter W.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Quantum Physics (quant-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We investigate chains of 'd' dimensional quantum spins (qudits) on a line with generic nearest neighbor interactions without translational invariance. We find the conditions under which these systems are not frustrated, i.e. when the ground states are also the common ground states of all the local terms in the Hamiltonians. The states of a quantum spin chain are naturally represented in the Matrix Product States (MPS) framework. Using imaginary time evolution in the MPS ansatz, we numerically investigate the range of parameters in which we expect the ground states to be highly entangled and find them hard to approximate using our MPS method.
description: 5 pages, 5 figures. Typos corrected
Longitudinal coupling between a Si/SiGe quantum dot and an off-chip TiN resonator
Creators: name: Corrigan, J.
name: Harpt, Benjamin
name: Holman, Nathan
name: Ruskov, Rusko
name: Marciniec, Piotr
name: Rosenberg, D.
name: Yost, D.
name: Das, R.
name: Oliver, William D.
name: McDermott, R.
name: Tahan, Charles
name: Friesen, Mark
name: Eriksson, M. A.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Superconducting cavities have emerged as a key tool for measuring the spin states of quantum dots. So far however, few experiments have explored longitudinal couplings between dots and cavities, and no solid-state qubit experiments have explicitly probed the "adiabatic" regime, where the Purcell decay is strongly suppressed. Here, we report measurements of a double-quantum-dot charge qubit coupled to a high-impedance resonator via a "flip-chip" design geometry. By applying an adiabatic ac drive to the qubit through two different channels, and studying the effects of qubit energy detuning, interdot tunneling, and driving strength, we are able to unequivocally confirm the presence of a longitudinal coupling between the qubit and cavity, while the qubit remains in its ground state. Since this coupling is proportional to the driving amplitude, and is therefore switchable, it has the potential to become a powerful new tool in qubit experiments.
description: Main text and Supplementary Materials, 16 pages, 10 figures
Retrofitting for resilience: A multi-hazard approach
Creators: name: Premier, Alessandro
Publisher: name: The University of Auckland
Year: 2021
Subjects: subject: 120105 Architecture Management
subject: FOS: Civil engineering
subject: 120199 Architecture not elsewhere classified

description: vThis item was presented in Auckland at the: Rethinking Sustainable Pacific Rim Territories. Proceedings of the 2020 APRU Sustainable Cities and Landscapes Hub PhD SymposiumDate: 14-18/12/20Editors: Paola Boarin, Errol Haarhoff, Manfredo Manfredini, Mohsen Mohammadzadeh, Alessandro Premier

ISBN: 978-0-473-53616-9
ABSTRACTResilience has received increased attention in urban-related research, policies and practice in recent years. Many urban development-related international initiatives have been established, such as the Making Cities Resilient Campaign and 100 Resilient Cities Programme, aiming to assist governments in enhancing urban resilience. Although the building stock is a significant component of the built environment, little work has been done on the scale of buildings compared to the work developed for the city scale. Resilient buildings can deliver their functions in the face of stresses and shocks, which are the converse of buildings that are vulnerable to the city's weaknesses and hazards. Enhancing the resilience of buildings boosts the urban fabric's resilience at a larger scale. This paper discusses what defines resilient buildings, focusing on existing building retrofits as it offers great opportunity to enhance the resilience of the built environment on a larger scale. It establishes a comprehensive understanding of resilience in buildings that consider both stresses and shocks threatening the built environment. Since resilience is a context-specific approach, the study also takes Jordan as an example and identifies the resilience challenges of its buildings according to 200 local professionals' perception who responded to an online questionnaire.
Optical secret sharing with cascaded metasurface holography
Creators: name: Georgi, Philip
name: Wei, Qunshuo
name: Sain, Basudeb
name: Schlickriede, Christian
name: Wang, Yongtian
name: Huang, Lingling
name: Zentgraf, Thomas
Publisher: name: arXiv
Year: 2021
Subjects: subject: Optics (physics.optics)
subject: Cryptography and Security (cs.CR)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: Secret sharing is a well-established cryptographic primitive for storing highly sensitive information like encryption keys for encoded data. It describes the problem of splitting a secret into different shares, without revealing any information about the secret to its shareholders. Here, we demonstrate an all-optical solution for secret sharing based on metasurface holography. In our concept, metasurface holograms are used as spatially separable shares that carry an encrypted message in form of a holographic image. Two of these shares can be recombined by bringing them close together. Light passing through this stack of metasurfaces accumulates the phase shift of both holograms and can optically reconstruct the secret with high fidelity. On the other hand, the holograms generated by the single metasurfaces can be used for identifying each shareholder. Furthermore, we demonstrate that the inherent translational alignment sensitivity between the two stacked metasurface holograms can be used for spatial multiplexing, which can be further extended to realize optical rulers.
An Asymptotic-Preserving Scheme for Isentropic Flow in Pipe Networks
Creators: name: Redle, Michael
name: Herty, Michael
Publisher: name: RWTH Aachen University
Year: 2024
Subjects: Isentropic Euler equations
all-speed scheme
asypmtotic-preserving scheme
central-upwind scheme
flux splitting
implicit-explicit approach
low Mach limit on pipe networks
non-conservative hyperbolic systems of nonlinear PDEs
pipe networks

description: 26 Seiten (2024). doi:10.48550/arXiv.2411.09162
Adapting to climate change through the strengthening of asset management practices in Kiribati: Examples from the water sector
Creators: name: Reenate Willie
name: Theuns Henning
name: Sandeeka Mannakkara
Publisher: name: The University of Auckland
Year: 2021
Subjects: subject: 60306 Evolutionary Impacts of Climate Change
subject: FOS: Biological sciences
subject: 40104 Climate Change Processes
subject: FOS: Earth and related environmental sciences
subject: 90505 Infrastructure Engineering and Asset Management
subject: FOS: Civil engineering

description: This item is part of: Boarin, P., Haarhoff, E., Manfredini, M., Mohammadzadeh, M., Premier, A., (2021). Rethinking Sustainable Pacific Rim Territories. Proceedings of the 2020 APRU Sustainable Cities and Landscapes Hub PhD Symposium, Future Cities Research Hub, School of Architecture and Planning of the University of Auckland. ISBN: 978-0-473-53616-9
ABSTRACTKiribati is representative of a Pacific Island nation, which is both a Small Island Developing State and Least Developing Country with very real climate change challenges and weaknesses in asset management. Climate change adaptation and infrastructure development in this nation are already intricately linked. Despite this, Kiribati is still heavily hampered with the build neglect paradigm which impacts on both development and adaptation efforts. Furthermore, the parallels between climate change adaptation programmes or projects and infrastructure development has become increasingly hazy and given rise to a growing dependency on external funding. This paper aims to understand the role of asset management in this ongoing paradigm. Consideration is given on how asset management practices could be strengthened for effective adaptation to climate change in Kiribati, with specific examples from the water sector. Further understanding of how asset management works in this context is important including more support for its ongoing implementation and sustainable funding. The methodology employed for this research include, literature review, document analysis and interview with the Government of Kiribati Ministry staff.
Radiation pressure confinement -- V. The predicted free-free absorption and emission in active galactic nuclei
Creators: name: Baskin, Alexei
name: Laor, Ari
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The effect of radiation pressure compression (RPC) on ionized gas in Active Galactic Nuclei (AGN) likely sets the photoionized gas density structure. The photoionized gas free-free absorption and emission are therefore uniquely set by the incident ionizing flux. We use the photoionization code Cloudy RPC model results to derive the expected relations between the free-free emission and absorption properties and the distance from the AGN centre, for a given AGN luminosity. The free-free absorption frequency of RPC gas is predicted to increases from $\sim$100 MHz on the kpc scale, to $\sim$100 GHz on the sub-pc scale, consistent with observations of spatially resolved free-free absorption. The free-free emission at 5 GHz is predicted to yield a radio loudness of $R\sim 0.03$, below the typical observed values of $R\sim 0.1-1$ in radio-quiet AGN. However, the flat free-free radio continuum may become dominant above 100 GHz. The suggested detection of optically thin free-free emission in NGC 1068, on the sub pc torus scale, is excluded as the brightness temperature is too high for optically thin free-free emission. However, excess emission observed with ALMA above 150 GHz in NGC 1068, is consistent with the predicted free-free emission from gas just outside the broad line region, a region which overlaps the hot dust disc resolved with GRAVITY. Extended $\sim$100 pc scale free-free emission is also likely present in NGC 1068. Future sub mm observation of radio quiet AGN with ALMA may allow to image the free-free emission of warm photoionized gas in AGN down to the 30 mas scale, including highly absorbed AGN.
description: 18 pages, 13 figures; accepted for publication in MNRAS
Cooling and Near-equilibrium Dynamics of Atomic Gases Across the Superfluid-Mott Insulator Transition
Creators: name: Hung, Chen-Lung
name: Zhang, Xibo
name: Gemelke, Nathan
name: Chin, Cheng
Publisher: name: arXiv
Year: 2009
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: We study near-equilibrium thermodynamics of bosonic atoms in a two-dimensional optical lattice by ramping up the lattice depth to convert a superfluid into an inhomogeneous mixture of superfluid and Mott insulator. Detailed study of in situ density profiles shows that, first, locally adiabatic ramps do not guarantee global thermal equilibrium. Indeed, full thermalization for typical parameters only occurs for experiment times which exceed one second. Secondly, ramping non-adiabatically to the Mott insulator regime can result in strong localized cooling at short times and global cooling once equilibrated. For an initial temperature estimated as 20 nK, we observe local temperatures as low as 1.5 nK, and a final global temperature of 9 nK. Possible cooling mechanisms include adiabatic decompression, modification of the density of states near the quantum critical regime, and the Joule-Thomson effect. **NOTE: Following submission of arXiv:0910.1382v1, a systematic correction was discovered in the density measurement, stemming from three-body losses during the imaging process. New measurements were performed, and the result is in support of the claim on the slow global dynamics. Due to the substantially altered methods and analysis, a new text has been posted as arXiv:1003.0855.
description: This paper has been withdrawn by the authors. See NOTE.
Feeding SMBHs through supersonic turbulence and ballistic accretion
Creators: name: Hobbs, Alexander
name: Nayakshin, Sergei
name: Power, Chris
name: King, Andrew
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: It has long been recognised that the main obstacle to accretion of gas onto supermassive black holes (SMBHs) is large specific angular momentum. It is feared that the gas settles in a large scale disc, and that accretion would then proceed too inefficiently to explain the masses of the observed SMBHs. Here we point out that, while the mean angular momentum in the bulge is very likely to be large, the deviations from the mean can also be significant. Indeed, cosmological simulations show that velocity and angular momentum fields of gas flows onto galaxies are very complex. Furthermore, inside bulges the gas velocity distribution can be further randomised by the velocity kicks due to feedback from star formation. We perform hydrodynamical simulations of gaseous rotating shells infalling onto an SMBH, attempting to quantify the importance of velocity dispersion in the gas at relatively large distances from the black hole. We implement this dispersion by means of a supersonic turbulent velocity spectrum. We find that, while in the purely rotating case the circularisation process leads to efficient mixing of gas with different angular momentum, resulting in a low accretion rate, the inclusion of turbulence increases this accretion rate by up to several orders of magnitude. We show that this can be understood based on the notion of "ballistic" accretion, whereby dense filaments, created by convergent turbulent flows, travel through the ambient gas largely unaffected by hydrodynamical drag. We derive a simple analytical formula that captures the numerical results to within a factor of a few. Rescaling our results to astrophysical bulges, we argue that this "ballistic" mode of accretion could provide the SMBHs with a sufficient supply of fuel without the need to channel the gas via large-scale discs or bars, and therefore that star formation in bulges can be a strong catalyst for SMBH accretion.
description: 21 pages, 21 figures. Accepted and published by MNRAS
Gnotus chionops
Creators: name: Riedel
name: Pénigot
name: Schwarz
name: Diller
name: Johansson
name: Japoshvili, G.
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Ichneumonidae
Gnotus
Gnotus chionops

description: Gnotus chionops (GRAVENHORST, 1829), det. Schwarz
M a t e r i a l e x a m i n e d: Trap 7: 1♀ 23.iv.-5.v.
D i s t r i b u t i o n: Western Palaearctic and Nearctic, new record for Georgia and the Caucasus region.
description: Published as part of Riedel, Pénigot, Schwarz, Diller, Johansson & Japoshvili, G., 2023, Darwin wasps (Hymenoptera, Ichneumonidae) of the Kintrishi National Park, Sakartvelo (Georgia), with descriptions of six new species, pp. 61-153 in Linzer biologische Beiträge 55 (1) on page 122, DOI: 10.5281/zenodo.10415120
Hall map and breakdown of Fermi liquid theory in the vicinity of a Mott insulator
Creators: name: Khait, Ilia
name: Bhattacharyya, Sauri
name: Samanta, Abhisek
name: Auerbach, Assa
Publisher: name: arXiv
Year: 2022
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: The Hall coefficient exhibits anomalous behavior in lightly doped Mott insulators. For strongly interacting electrons its computation has been challenged by analytical and numerical obstacles. We calculate the leading contributions in the recently derived thermodynamic formula for the Hall coefficient. We obtain its doping and temperature dependence for the square lattice tJ-model at high temperatures. The second order corrections are evaluated to be negligible. Quantum Monte Carlo sampling extends our results to lower temperatures. We find a divergence of the Hall coefficient toward the Mott limit and a sign reversal relative to Boltzmann equation's weak scattering prediction. The Hall current near the Mott phase is carried by a low density of spin-entangled vacancies, which should constitute the Cooper pairs in any superconducting phase at lower temperatures.
Prospects for studying the solar CNO cycle by means of a lithium neutrino detector
Creators: name: Kopylov, A.
name: Petukhov, V.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Lithium detectors have a high sensitivity to CNO neutrinos from the Sun. The present experimental data and prospects for future experiments on the detection of CNO neutrinos are discussed. A nonstationary case is considered when the flux of 13N neutrinos is higher than the standard solar model predicts due to the influx of fresh material from the peripheral layers to the solar core.
description: 12 pages, 5 figures, a thoroughly revised version, reported at International Symposium "Physics of Massive Neutrinos" at MILOS (Greece) 19-23 May 2008
Hartwin BRANDT, Die Kaiserzeit. Römische Geschichte von Octavian bis Diocletian, 31 v. Chr. – 284 n. Chr.
Creators: name: Klär, Timo
Publisher: name: Göttinger Forum für Altertumswissenschaft
Year: 2024

description: Rezension zu: Hartwin Brandt, Die Kaiserzeit. Römische Geschichte von Octavian bis Diocletian, 31 v. Chr. – 284 n. Chr. Handbuch der Altertumswissenschaft, 3. Abteilung, Bd. 11. München: C.H. Beck 2021, 707 S., EUR 98,00. ISBN 978-3-406-77502-4
description: Göttinger Forum für Altertumswissenschaft, Bd. 26 (2023): Göttinger Forum für Altertumswissenschaft
Adapting to climate change through the strengthening of asset management practices in Kiribati: Examples from the water sector
Creators: name: Premier, Alessandro
Publisher: name: The University of Auckland
Year: 2021
Subjects: subject: 120105 Architecture Management
subject: FOS: Civil engineering
subject: 120199 Architecture not elsewhere classified

description: This item was presented in Auckland at the: Rethinking Sustainable Pacific Rim Territories. Proceedings of the 2020 APRU Sustainable Cities and Landscapes Hub PhD SymposiumDate: 14-18/12/20Editors: Paola Boarin, Errol Haarhoff, Manfredo Manfredini, Mohsen Mohammadzadeh, Alessandro Premier

ISBN: 978-0-473-53616-9
ABSTRACTKiribati is representative of a Pacific Island nation, which is both a Small Island Developing State and Least Developing Country with very real climate change challenges and weaknesses in asset management. Climate change adaptation and infrastructure development in this nation are already intricately linked. Despite this, Kiribati is still heavily hampered with the build neglect paradigm which impacts on both development and adaptation efforts. Furthermore, the parallels between climate change adaptation programmes or projects and infrastructure development has become increasingly hazy and given rise to a growing dependency on external funding. This paper aims to understand the role of asset management in this ongoing paradigm. Consideration is given on how asset management practices could be strengthened for effective adaptation to climate change in Kiribati, with specific examples from the water sector. Further understanding of how asset management works in this context is important including more support for its ongoing implementation and sustainable funding. The methodology employed for this research include, literature review, document analysis and interview with the Government of Kiribati Ministry staff.
Combinatorial reciprocity for non-intersecting paths
Creators: name: Hopkins, Sam
name: Zaimi, Gjergji
Publisher: name: arXiv
Year: 2023
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics

description: We prove a combinatorial reciprocity theorem for the enumeration of non-intersecting paths in a linearly growing sequence of acyclic planar networks. We explain two applications of this theorem: reciprocity for fans of bounded Dyck paths, and reciprocity for Schur function evaluations with repeated values.
description: 18 pages, 8 figures; v2: final version to appear in "Enumerative Combinatorics and Applications"
Gaussian fluctuations in the Equipartition Principle for Wigner matrices
Creators: name: Cipolloni, Giorgio
name: Erdős, László
name: Henheik, Joscha
name: Kolupaiev, Oleksii
Publisher: name: arXiv
Year: 2023
Subjects: subject: Mathematical Physics (math-ph)
subject: Probability (math.PR)
subject: FOS: Physical sciences
subject: FOS: Mathematics
subject: 60B20, 82B10, 58J51

description: The total energy of an eigenstate in a composite quantum system tends to be distributed equally among its constituents. We identify the quantum fluctuation around this equipartition principle in the simplest disordered quantum system consisting of linear combinations of Wigner matrices. As our main ingredient, we prove the Eigenstate Thermalisation Hypothesis and Gaussian fluctuation for general quadratic forms of the bulk eigenvectors of Wigner matrices with an arbitrary deformation.
description: 34 pages, 1 figure; final version
Metastable superfluidity of repulsive fermionic atoms in optical lattices
Creators: name: Rosch, Achim
name: Rasch, David
name: Binz, Benedikt
name: Vojta, Matthias
Publisher: name: arXiv
Year: 2008
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: In the fermionic Hubbard model, doubly occupied states have an exponentially large lifetime for strong repulsive interactions U. We show that this property can be used to prepare a metastable s-wave superfluid state for fermionic atoms in optical lattices described by a large-U Hubbard model. When an initial band-insulating state is expanded, the doubly occupied sites Bose condense. A mapping to the ferromagnetic Heisenberg model in an external field allows for a reliable solution of the problem. Nearest-neighbor repulsion and pair hopping are important in stabilizing superfluidity.
description: 4 pages, 3 figs; (v2) final version as published
Social capital in community response after Cyclone Winston: Case study of three different communities in Fiji
Creators: name: Sainimere Veitata
name: Miyaji, Mari
name: Fujieda, Ayako
name: Kobayashi, Hirohide
Publisher: name: The University of Auckland
Year: 2021
Subjects: subject: 60202 Community Ecology (excl. Invasive Species Ecology)
subject: FOS: Biological sciences
subject: 50101 Ecological Impacts of Climate Change
subject: FOS: Earth and related environmental sciences
subject: 60306 Evolutionary Impacts of Climate Change

description: This item is part of: Boarin, P., Haarhoff, E., Manfredini, M., Mohammadzadeh, M., Premier, A., (2021). Rethinking Sustainable Pacific Rim Territories. Proceedings of the 2020 APRU Sustainable Cities and Landscapes Hub PhD Symposium, Future Cities Research Hub, School of Architecture and Planning of the University of Auckland. ISBN: 978-0-473-53616-9
ABSTRACTThis paper examines the roles of communities’ response to Tropical Cyclone (TC) Winston in 2016. The paper will aim to understand how communities responded to TC Winston and to analyze social capital in their response activities. The study investigates three community case studies in Fiji where community prioritization of activities and community responses used both bonding and bridging social capital. The data was collected by using household interviews, focus group discussions and key informant interview. This study highlights that communities in Fiji have potential to coordinate response activities internally before external sources of assistance or aid is given. Strong family networks, community cooperation (solesolevaki), existing governance structure for good leadership and the interactions with religious organizations in the communities are several factors that contribute to effective community response. Strengthening social capital in communities in Fiji has the potential to form a safety net for all communities whilst waiting for government assistance and other relief organization to arrive. Findings from this research highlights the community’s capacity in relation to social capital and contributions towards strengthening linkage between government and community in Fiji.
Optimal Location of Sources in Transportation Networks
Creators: name: Yeung, C. H.
name: Wong, K. Y. Michael
Publisher: name: arXiv
Year: 2010
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We consider the problem of optimizing the locations of source nodes in transportation networks. A reduction of the fraction of surplus nodes induces a glassy transition. In contrast to most constraint satisfaction problems involving discrete variables, our problem involves continuous variables which lead to cavity fields in the form of functions. The one-step replica symmetry breaking (1RSB) solution involves solving a stable distribution of functionals, which is in general infeasible. In this paper, we obtain small closed sets of functional cavity fields and demonstrate how functional recursions are converted to simple recursions of probabilities, which make the 1RSB solution feasible. The physical results in the replica symmetric (RS) and the 1RSB frameworks are thus derived and the stability of the RS and 1RSB solutions are examined.
description: 38 pages, 18 figures
Graphene nanoribbons for quantum electronics
Creators: name: Wang, Haomin
name: Wang, Hui Shan
name: Ma, Chuanxu
name: Chen, Lingxiu
name: Jiang, Chengxin
name: Chen, Chen
name: Xie, Xiaoming
name: Li, An-Ping
name: Wang, Xinran
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Graphene nanoribbons (GNRs) are a family of one-dimensional (1D) materials carved from graphene lattice. GNRs possess high mobility and current carrying capability, sizable bandgap, and versatile electronic properties tailored by the orientations and open edge structures. These unique properties make GNRs promising candidates for prospective electronics applications including nano-sized field-effect transistors (FETs), spintronic devices, and quantum information processing. To fully exploit the potential of GNRs, fundamental understanding of structure-property relationship, precise control of atomic structures and scalable production are the main challenges. In the last several years, significant progress has been made toward atomically precise bottom-up synthesis of GNRs and heterojunctions that provide an ideal platform for functional molecular devices, as well as successful production of semiconducting GNR arrays on insulating substrates potentially useful for large-scale digital circuits. With further development, GNRs can be envisioned as a competitive candidate material in future quantum information sciences (QIS). In this Perspective, we review recent progress in GNR research and identify key challenges and new directions likely to develop in the near future.
description: 22 pages, 3 figures, 1 box
Mechanism of delayed hypersensitivity reactions : in vitro and in vivo studies of the possible role of certain lymphokines in the development of delayed hypersensitivity reactions
Creators: name: Wong, Fook Chuen
Publisher: name: University of British Columbia
Year: 2010

description: The aim of the present study was to determine how lymphokines could exert their biological action on the skin during the course of the delayed hypersensitivity reactions. Four groups of experiments were conducted to investigate: (1) The production and the separation of lymphokines, (2) the protease activity of lymphokines and the effect of lymphokines on the kinin-forming system, (3) the effect of lymphokines on mast cells and platelets, and (4) the effect of enzyme-treated lymphokines on the skin inflammatory reaction. Guinea pig lymph node lymphocytes, stimulated by either the specific antigen DNP-BGG or by concanavalin A, were used to generate lymphokines. Parameters for testing lymphokine activities were those of migration inhibitory factor (MIF) and skin reactive factor (SRF). Separation of MIF and SRF from the lymphokine preparation by gel filtration, electrophoresis and fractional precipitation with ammonium sulphate was unsuccessful, which indicated that the physical properties of MIF and SRF were similar. Lymphokine preparations contained little or no neutral and acidic protease activities.
Graph-Theoretic Approach for Manufacturing Cybersecurity Risk Modeling and Assessment
Creators: name: Rahman, Md Habibor
name: Hamedani, Erfan Yazdandoost
name: Son, Young-Jun
name: Shafae, Mohammed
Publisher: name: arXiv
Year: 2023
Subjects: subject: Cryptography and Security (cs.CR)
subject: Systems and Control (eess.SY)
subject: Optimization and Control (math.OC)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Mathematics

description: Identifying, analyzing, and evaluating cybersecurity risks are essential to assess the vulnerabilities of modern manufacturing infrastructures and to devise effective decision-making strategies to secure critical manufacturing against potential cyberattacks. In response, this work proposes a graph-theoretic approach for risk modeling and assessment to address the lack of quantitative cybersecurity risk assessment frameworks for smart manufacturing systems. In doing so, first, threat attributes are represented using an attack graphical model derived from manufacturing cyberattack taxonomies. Attack taxonomies offer consistent structures to categorize threat attributes, and the graphical approach helps model their interdependence. Second, the graphs are analyzed to explore how threat events can propagate through the manufacturing value chain and identify the manufacturing assets that threat actors can access and compromise during a threat event. Third, the proposed method identifies the attack path that maximizes the likelihood of success and minimizes the attack detection probability, and then computes the associated cybersecurity risk. Finally, the proposed risk modeling and assessment framework is demonstrated via an interconnected smart manufacturing system illustrative example. Using the proposed approach, practitioners can identify critical connections and manufacturing assets requiring prioritized security controls and develop and deploy appropriate defense measures accordingly.
description: 25 pages, 10 figures
Creating a supersolid in one-dimensional Bose mixtures
Creators: name: Mathey, L.
name: Danshita, Ippei
name: Clark, Charles W.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: We identify a one-dimensional supersolid phase in a binary mixture of near-hardcore bosons with weak, local inter-species repulsion. We find realistic conditions under which such a phase, defined here as the coexistence of quasi-superfluidity and quasi-charge density wave order, can be produced and observed in finite ultra-cold atom systems in a harmonic trap. Our analysis is based on Luttinger liquid theory supported with numerical calculations using the time-evolving block decimation method. Clear experimental signatures of these two orders can be found, respectively, in time-of-flight interference patterns, and the structure factor S(k) derived from density correlations.
description: 4 pages, 5 figures, changed Fig. 4, and minor edits
Social capital in community response after Cyclone Winston: Case study of three different communities in Fiji
Creators: name: Premier, Alessandro
Publisher: name: The University of Auckland
Year: 2021
Subjects: subject: 120105 Architecture Management
subject: FOS: Civil engineering
subject: 120199 Architecture not elsewhere classified

description: This item was presented in Auckland at the: Rethinking Sustainable Pacific Rim Territories. Proceedings of the 2020 APRU Sustainable Cities and Landscapes Hub PhD SymposiumDate: 14-18/12/20Editors: Paola Boarin, Errol Haarhoff, Manfredo Manfredini, Mohsen Mohammadzadeh, Alessandro Premier

ISBN: 978-0-473-53616-9
ABSTRACTThis paper examines the roles of communities’ response to Tropical Cyclone (TC) Winston in 2016. The paper will aim to understand how communities responded to TC Winston and to analyze social capital in their response activities. The study investigates three community case studies in Fiji where community prioritization of activities and community responses used both bonding and bridging social capital. The data was collected by using household interviews, focus group discussions and key informant interview. This study highlights that communities in Fiji have potential to coordinate response activities internally before external sources of assistance or aid is given. Strong family networks, community cooperation (solesolevaki), existing governance structure for good leadership and the interactions with religious organizations in the communities are several factors that contribute to effective community response. Strengthening social capital in communities in Fiji has the potential to form a safety net for all communities whilst waiting for government assistance and other relief organization to arrive. Findings from this research highlights the community’s capacity in relation to social capital and contributions towards strengthening linkage between government and community in Fiji.
The Void Abundance with Non-Gaussian Primordial Perturbations
Creators: name: Kamionkowski, Marc
name: Verde, Licia
name: Jimenez, Raul
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We use a Press-Schechter-like calculation to study how the abundance of voids changes in models with non-Gaussian initial conditions. While a positive skewness increases the cluster abundance, a negative skewness does the same for the void abundance. We determine the dependence of the void abundance on the non-Gaussianity parameter fnl for the local-model bispectrum-which approximates the bispectrum in some multi-field inflation models-and for the equilateral bispectrum, which approximates the bispectrum in e.g. string-inspired DBI models of inflation. We show that the void abundance in large-scale-structure surveys currently being considered should probe values as small as fnl < 10 and fnl^eq < 30, over distance scales ~10 Mpc.
description: Submitted to JCAP
Lyman-Alpha-Emitting Galaxies at z = 2.1 in ECDF-S: Building Blocks of Typical Present-day Galaxies?
Creators: name: Guaita, L.
name: Gawiser, E.
name: Padilla, N.
name: Francke, H.
name: Bond, N. A.
name: Gronwall, C.
name: Ciardullo, R.
name: Feldmeier, J. J.
name: Sinawa, S.
name: Blanc, G. A.
name: Virani, S.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We discovered a sample of 250 Ly-Alpha emitting (LAE) galaxies at z=2.1 in an ultra-deep 3727 A narrow-band MUSYC image of the Extended Chandra Deep Field-South. LAEs were selected to have rest-frame equivalent widths (EW) > 20 A and emission line fluxes > 2.0 x 10^(-17)erg /cm^2/s, after carefully subtracting the continuum contributions from narrow band photometry. The median flux of our sample is 4.2 x 10^(-17)erg/cm^2/s, corresponding to a median Lya luminosity = 1.3 x 10^(42) erg/s at z=2.1. At this flux our sample is > 90% complete. Approximately 4% of the original NB-selected candidates were detected in X-rays by Chandra, and 7% were detected in the rest-frame far-UV by GALEX. At luminosity>1.3 x 10^42 erg/s, the equivalent width distribution is unbiased and is represented by an exponential with scale-length of 83+/-10 A. Above this same luminosity threshold, we find a number density of 1.5+/-0.5 x 10^-3 Mpc^-3. Neither the number density of LAEs nor the scale-length of their EW distribution show significant evolution from z=3 to z=2. We used the rest frame UV luminosity to estimate a median star formation rate of 4 M_(sun) /yr. The median rest frame UV slope, parametrized by B-R, is that typical of dust-free, 0.5-1 Gyr old or moderately dusty, 300-500 Myr old populations. Approximately 40% of the sample occupies the z~2 star-forming galaxy locus in the UVR two color diagram. Clustering analysis reveals that LAEs at z=2.1 have r_0=4.8+/-0.9 Mpc and a bias factor b=1.8+/-0.3. This implies that z=2.1 LAEs reside in dark matter halos with median masses Log(M/M_(sun))=11.5^(+0.4)_(-0.5), which are among of the lowest-mass halos yet probed at this redshift. We used the Sheth-Tormen conditional mass function to study the descendants of these LAEs and found that their typical present-day descendants are local galaxies with L* properties, like the Milky Way.
description: 35 pages, 9 figures, ApJ, in press
M5.5 - Initial repository registry support for discovery of repositories, policies, and interfaces
Creators: name: Ulrich, Robert
name: Verburg, Maaike
name: Priddy, Mike
name: Huber, Robert
name: L'Hours, Hervé
name: Neidiger, Charlotte
name: Meijas, Gabriela
name: Davidson, Joy
Publisher: name: Zenodo
Year: 2024
Subjects: FAIR
Transparency
Prototype
Trustworthiness
FAIR assessment
Registry
DCAT

description: The purpose of this Milestone is to initiate the prototyping phase, embodying FAIR-IMPACT’s approach to implementing the principles outlined in the initial version of the “Guidelines for repositories and registries on exposing repository trustworthiness status and FAIR data assessments outcomes” (Milestone 5.2). The proposed standards and technology stack are based on insights gathered through the activities in the earlier project FAIRsFAIR “Fostering FAIR Data Practices In Europe” and cross-work package collaboration and exchange among the FAIR-IMPACT project partners. This application of this stack is aimed at complementing the guidelines' technology and tool-agnostic character by establishing an initial linking and information structure for the prototype to be developed. It is intended to bridge repositories with registries and discovery services, thereby facilitating the better exposure and discovery of repository information. The registry role within the prototype will be covered by re3data - registry of research data repositories. In addition, it will enable the provision of information on the object level as well as quality measures due to the extensibility of the chosen technology stack. This work will serve as the foundation for the development of future guideline versions. Suggestions collected from the community will be used for revising, extending, and refining the transparent exposure of repository information and its support in registries like re3data as well as other services, such as F-UJI and CoreTrustSeal. Thus the approach is similar to the development of the guidelines and ensures that not only the prototype but also guidelines themselves remain responsive to the needs and insights of stakeholders.
Entanglement and symmetry in permutation symmetric states
Creators: name: Markham, Damian J. H.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We investigate the relationship between multipartite entanglement and symmetry, focusing on permutation symmetric states. We use the Majorana representation, where these states correspond to points on a sphere. Symmetry of the representation under rotation is equivalent to symmetry of the states under products of local unitaries. The geometric measure of entanglement is thus phrased entirely as a geometric optimisation, and a condition for the equivalence of entanglement measures written in terms of point symmetries. Finally we see that different symmetries of the states correspond to different types of entanglement with respect to SLOCC interconvertibility.
description: 4 pages, 2 figures. Preliminary versions of some of these results were presented in the QIT 16 workshop in Japan, D. Markham, Proceedings of QIT 16, Japan (2007). Updated to reflect changes for publication: expanded proofs and some new examples given