cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
title: Αστικό Bricollage. Μονάδες ενεργοποίησης του Ελαιώνα.

title: Urban Bricollage. Activation units of Elaionas area

Creators: name: Κουτσουδη Σμαραγδα
name: Τζανετη Μαρια-Ιωαννα
Publisher: name: Technical University of Crete
Year: 2024

description: Η παρούσα διπλωματική εργασία, αφορά ένα κέντρο καλλιέργειας που αποσκοπεί στην ενεργοποίηση της περιοχής του Ελαιώνα.
Η περιοχή του Ελαιώνα γίνεται αντιληπτή ως αστικό κενό, ως τόπος που παρασιτεί στο κατά τα άλλα σαφώς δομημένο λεκανοπέδιο της Αττικής, καθώς και ως πεδίο που διαγράφονται καθαρά σε αυτό ποικίλα κοινωνικά φαινόμενα.
Οι παραπάνω λόγοι αποτέλεσαν αφορμή για την διερεύνηση σχεδιαστικών εργαλείων που θα ενθαρρύνουν τον ανοιχτό διάλογο μεταξύ αρχιτεκτονικής και τόπου.
Ο Ελαιώνας αναλύθηκε ως προς την ιστορική του εξέλιξη, τις τυπολογίες και αντιθέσεις που παρατηρούνται εντός των ορίων του αλλά και σε σχέση με τις περιοχές που γειτνιάζει.
Στη συνέχεια και με βάσει τις ποιότητες που εντοπίστηκαν, προτείνεται μια μονάδα που αποσκοπεί στην συσχέτιση και ενεργοποίηση στοιχείων του τόπου. Πιο συγκεκριμένα, η μονάδα έχει ως κυρίαρχη χρήση την καλλιέργεια και υποστηρικτικές χρήσεις γύρω από αυτή. Συνομιλώντας με το γεωπονικό πανεπιστήμιο, η μονάδα διαθέτει ακόμα εργαστήρια και χώρους μελέτης.
Επιπλέον διαθέτει βιβλιοθήκη, αμφιθέατρα και χώρους που μπορούν να στεγάσουν εγχειρήματα όπως συλλογική κουζίνα, αγορά και maker space. Όλες αυτές οι χρήσεις διαρθρώνονται γύρο από τέσσερα αίθρια, που με την σειρά τους αποτελούν αντίκρισμα αυτών. Η πορεία ξεκινάει από τους χώρους με δημόσιο χαρακτήρα και καταλήγει σταδιακά σε ιδιωτικούς.
description: The present thesis concerns a cultivation centre aimed at activating Elaionas area in Athens.  The area of Elaionas is perceived as an urban void, as a place that stalks the otherwise clearly structured Attica basin, as well as a field where various social phenomena are clearly outlined. The above reasons prompted the exploration of design tools that would encourage an open dialogue between architecture and place.
The Elaionas was analysed in terms of its historical evolution, the typologies and contrasts observed within its boundaries and in relation to the areas it adjoins. Subsequently, and based on the qualities identified, a unit is proposed that aims to relate and activate elements of place.
More specifically, the unit has a dominant use of cultivation and supporting uses around it. In conversation with the agricultural university, the unit still has laboratories and study areas. In addition, it has a library, auditoriums and spaces that can house ventures such as a market and maker space. All of these uses are structured around four atriums, which in turn are an impact of these. The path starts from the public spaces and gradually leads to private spaces.
Moral identity and ethical decision making
Creators: name: Noja, Marcelle Maria
Publisher: name: The Australian National University
Year: 2013
Subjects: subject: BJ1419.N65 2013
subject: Identity (Psychology)
subject: Decision making Moral and ethical aspects

description: Four studies were undertaken to assess the role of moral identity in ethical decision making. The first two studies attempted to use two primes of moral identity to determine whether, when a person's moral identity is threatened, they undertake moral cleansing or compensatory behaviour, whereas where a person's moral identity is salient they have a strong self-worth and will consequently use moral licensing to act less ethically. Both studies were unsuccessful in supporting this hypothesis. Discussion of the results suggested that the approach within the research methodology was too complex. Based on this result, a third study attempted a simplified approach to assessing influences on ethical decision making. Specifically, Study 3 assessed the role of in-group and out-group judgements comparative to judgments of the self. The results suggested that in some circumstances, a person may change their own behaviour depending on what a colleague or non-colleague might do. The final study used this result to assess the impact of an observer on participants' ethical decision making. The results confirmed that the value of donations to charity could be influenced by both the presence of another person and that person's status relative to the participant. The implications for the ethical decision making field, along with future research in this area, are discussed.
WoodCircus Good Practice: Upcycling sawmill residues to value-added fibre products
Creators: name: Partanen, Asta
name: Piltz, Gunilla
name: vom Berg, Christopher
Publisher: name: Zenodo
Year: 2021

description: Description of the Upcycling sawmill residues to value-added fibre products good practice identified in the WoodCircus project. Page 9 of the Good Practice Catalogue.
Application of reliability theory to highway geometric design
Creators: name: Zheng, Zhimei Ronda
Publisher: name: University of British Columbia
Year: 2009

description: To improve road safety and to reduce accident costs, roadway geometries are frequently modified based on the relationship between deficient geometric elements and the recorded accidents. This remedial approach requires fatalities and injuries to occur before the needs and priorities of roadway improvements may be identified. Rather than adopt this approach, the present research took a preventive initiate in highway geometric design stage to detect, quantify and correct hazards prior to their being constructed. Highway geometric design is proposed to be performed in relation to vehicle dynamics. This is a major contribution from this research. The methodology was a reliability-based highway geometric design, similar to "limit state" design in structural engineering. It used probability of non-compliance with design criteria to identify drivers' behaviour responses to different design alternatives. This research focused on the development of a more correct representation of the driver-vehicle-roadway interaction - the Moving Coordinate System Design (MCSD) model, the establishment of an evaluation process for the safety level of an entire highway, the application of the "racing car model" as the upper operating limit, the development of VHVIS.PAC algorithm to utilize photolog data as the geometric design input for reliability analysis, and the incorporation of the growing knowledge of human factors into highway geometric design. The research applied reliability theory to geometric design for an entire highway by incorporating vehicle dynamic characteristics, operational experience, human factor consideration and the ultimate limit of road-vehicle interaction. It provides the designers with opportunities to visualize as quantitatively as possible how the design will be experienced by individual drivers under the range of speeds and other operating conditions that will occur when the highway is actually built and put into use. The resulting safety performance measures from all available design alternatives could eventually lead to a cost-effective geometric design process. The following questions are addressed by this research: • How do different groups of drivers, such as design drivers, normal drivers and expert drivers operate on the same roadway? What kind of safety performance can be expected from each group? • Is the difference in the margin of safety among different driver groups significant? • What is the cost-effectiveness associated with each modification of a particular design? • What is the connection between design and traffic operation criteria? How does every design criterion reflect the anticipated operation of the highway? How does the proposed model fit into the existing geometric design process?
On Spectral Triples in Quantum Gravity II
Creators: name: Aastrup, Johannes
name: Grimstrup, Jesper M.
name: Nest, Ryszard
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: A semifinite spectral triple for an algebra canonically associated to canonical quantum gravity is constructed. The algebra is generated by based loops in a triangulation and its barycentric subdivisions. The underlying space can be seen as a gauge fixing of the unconstrained state space of Loop Quantum Gravity. This paper is the second of two papers on the subject.
description: 43 pages, 1 figure
Branching processes with immigration and related topics
Creators: name: Li, Zenghu
Publisher: name: arXiv
Year: 2006
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics
subject: 60J80

description: This is a survey on recent progresses in the study of branching processes with immigration, generalized Ornstein-Uhlenbeck processes and affine Markov processes. We mainly focus on the applications of skew convolution semigroups and the connections in those processes.
Self-organization with equilibration: a model for the intermediate phase in rigidity percolation
Creators: name: Chubynsky, M. V.
name: Briere, M. -A.
name: Mousseau, N.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Recent experimental results for covalent glasses suggest the existence of an intermediate phase attributed to the self-organization of the glass network resulting from the tendency to minimize its internal stress. However, the exact nature of this experimentally measured phase remains unclear. We modify a previously proposed model of self-organization by generating a uniform sampling of stress-free networks. In our model, studied on a diluted triangular lattice, an unusual intermediate phase appears, in which both rigid and floppy networks have a chance to occur, a result also observed in a related model on a Bethe lattice by Barre et al. [Phys. Rev. Lett. 94, 208701 (2005)]. Our results for the bond-configurational entropy of self-organized networks, which turns out to be only about 2% lower than that of random networks, suggest that a self-organized intermediate phase could be common in systems near the rigidity percolation threshold.
description: 9 pages, 6 figures
Near ML detection using Dijkstra's algorithm with bounded list size over MIMO channels
Creators: name: Okawado, Atsushi
name: Matsumoto, Ryutaroh
name: Uyematsu, Tomohiko
Publisher: name: arXiv
Year: 2008
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: We propose Dijkstra's algorithm with bounded list size after QR decomposition for decreasing the computational complexity of near maximum-likelihood (ML) detection of signals over multiple-input-multiple-output (MIMO) channels. After that, we compare the performances of proposed algorithm, QR decomposition M-algorithm (QRD-MLD), and its improvement. When the list size is set to achieve the almost same symbol error rate (SER) as the QRD-MLD, the proposed algorithm has smaller average computational complexity.
description: 8 pages, two column, 14 figures, LaTeX2e
Visualizing the multifractal wavefunctions of a disordered two-dimensional electron gas
Creators: name: Jäck, Berthold
name: Zinser, Fabian
name: onig, Elio J. K\"
name: Wissing, Sune N. P.
name: Schmidt, Anke B.
name: Donath, Markus
name: Kern, Klaus
name: Ast, Christian R.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: The wavefunctions of a disordered two-dimensional electron gas at the quantum-critical Anderson transition are predicted to exhibit multifractal scaling in their real space amplitude. We experimentally investigate the appearance of these characteristics in the spatially resolved local density of states of a two-dimensional mixed surface alloy Bi_xPb_{1-x}/Ag(111), by combining high-resolution scanning tunneling microscopy with spin and angle-resolved inverse-photoemission experiments. Our detailed knowledge of the surface alloy electronic band structure, the exact lattice structure and the atomically resolved local density of states enables us to construct a realistic Anderson tight binding model of the mixed surface alloy, and to directly compare the measured local density of states characteristics with those from our model calculations. The statistical analyses of these two-dimensional local density of states maps reveal their log-normal distributions and multifractal scaling characteristics of the underlying wavefunctions with a finite anomalous scaling exponent. Finally, our experimental results confirm theoretical predictions of an exact scaling symmetry for Anderson quantum phase transitions in the Wigner-Dyson classes.
description: 10 pages, 7 figures
Bayesian variable selection and data integration for biological regulatory networks
Creators: name: Jensen, Shane T.
name: Chen, Guang
name: Stoeckert,, Christian J.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Statistics Theory (math.ST)
subject: Molecular Networks (q-bio.MN)
subject: Applications (stat.AP)
subject: FOS: Mathematics
subject: FOS: Biological sciences
subject: FOS: Computer and information sciences

description: A substantial focus of research in molecular biology are gene regulatory networks: the set of transcription factors and target genes which control the involvement of different biological processes in living cells. Previous statistical approaches for identifying gene regulatory networks have used gene expression data, ChIP binding data or promoter sequence data, but each of these resources provides only partial information. We present a Bayesian hierarchical model that integrates all three data types in a principled variable selection framework. The gene expression data are modeled as a function of the unknown gene regulatory network which has an informed prior distribution based upon both ChIP binding and promoter sequence data. We also present a variable weighting methodology for the principled balancing of multiple sources of prior information. We apply our procedure to the discovery of gene regulatory relationships in Saccharomyces cerevisiae (Yeast) for which we can use several external sources of information to validate our results. Our inferred relationships show greater biological relevance on the external validation measures than previous data integration methods. Our model also estimates synergistic and antagonistic interactions between transcription factors, many of which are validated by previous studies. We also evaluate the results from our procedure for the weighting for multiple sources of prior information. Finally, we discuss our methodology in the context of previous approaches to data integration and Bayesian variable selection.
description: Published in at http://dx.doi.org/10.1214/07-AOAS130 the Annals of Applied Statistics (http://www.imstat.org/aoas/) by the Institute of Mathematical Statistics (http://www.imstat.org)
Polarization of hot Jupiter systems: a likely detection of stellar activity and a possible detection of planetary polarization
Creators: name: Bailey, Jeremy
name: Bott, Kimberly
name: Cotton, Daniel V.
name: Kedziora-Chudczer, Lucyna
name: Zhao, Jinglin
name: Evensberget, Dag
name: Marshall, Jonathan P.
name: Wright, Duncan
name: Lucas, P. W.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We present high-precision linear polarization observations of four bright hot Jupiter systems ($τ$ Boo, HD 179949, HD 189733 and 51 Peg) and use the data to search for polarized reflected light from the planets. The data for 51 Peg are consistent with a reflected light polarization signal at about the level expected with 2.8$σ$ significance and a false alarm probability of 1.9 per cent. More data will be needed to confirm a detection of reflected light in this system. HD 189733 shows highly variable polarization that appears to be most likely the result of magnetic activity of the host star. This masks any polarization due to reflected light, but a polarization signal at the expected level of $\sim$20 ppm cannot be ruled out. $τ$ Boo and HD 179949 show no evidence for polarization due to reflected light. The results are consistent with the idea that many hot Jupiters have low geometric albedos. Conclusive detection of polarized reflected light from hot Jupiters is likely to require further improvements in instrument sensitivity.
description: 16 pages, 8 figures, accepted by MNRAS
Death ex machina? : the use of technology and its impact on genocide and prevention
Creators: name: Macgregor, Isabelle
Publisher: name: The Australian National University
Year: 2013
Subjects: subject: Genocide Prevention
subject: Technology Social aspects.
subject: Technology Moral and ethical aspects.
subject: Social media
subject: Citizen journalism

description: The rapid pace of technology's evolution and uptake since the end of the Cold War, coupled with its role as a driver of many recent political changes, suggests that some uses of technology might contribute to genocide. Technological change and new developments in its use can redistribute power and impact the global environment, as well as reshaping the dynamics of local natural, political and social environments. Use of new media, including the internet, social media and mobile phones, promotes "citizen journalism", in which news and video footage is gathered and disseminated by amateurs. Citizen journalism is increasing during times of conflict and there exists a hotly contested "arms race" for control of these fora between genocidal governments, resistance groups and foreign governments and their citizens. By democratising control of communication, use of new media might shift the balance of power toward those who would resist, or prevent, genocide. An increasing and unsustainable use of technology has contributed to climate change. Climate change will likely enhance genocide risk through a number of causal pathways including resource scarcity, inequality and reduced economic growth. Implications for prevention are assessed with a focus on the doctrine of the Responsibility to Protect (R2P). This thesis works toward filling a major policy gap in R2P, in which international responsibility to prevent and intervene in genocide remains diffuse, allowing for inaction. Rather than weakening the doctrine, linking genocide prevention with action to mitigate climate change would strengthen its standing as an international norm. The insight that technology use can influence genocide is applied to genocide prevention. Evidence suggests that aspects of technology use can be harnessed for prevention, and these are often most effectively used "upstream", well before genocide is imminent.
Exact Multivariate Amplitude Distributions for Non-Stationary Gaussian or Algebraic Fluctuations of Covariances or Correlations
Creators: name: Guhr, Thomas
name: Schell, Andreas
Publisher: name: arXiv
Year: 2020
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Mathematical Physics (math-ph)
subject: Risk Management (q-fin.RM)
subject: FOS: Physical sciences
subject: FOS: Economics and business

description: Complex systems are often non-stationary, typical indicators are continuously changing statistical properties of time series. In particular, the correlations between different time series fluctuate. Models that describe the multivariate amplitude distributions of such systems are of considerable interest. Extending previous work, we view a set of measured, non-stationary correlation matrices as an ensemble for which we set up a random matrix model. We use this ensemble to average the stationary multivariate amplitude distributions measured on short time scales and thus obtain for large time scales multivariate amplitude distributions which feature heavy tails. We explicitly work out four cases, combining Gaussian and algebraic distributions. The results are either of closed forms or single integrals. We thus provide, first, explicit multivariate distributions for such non-stationary systems and, second, a tool that quantitatively captures the degree of non-stationarity in the correlations.
description: 39 pages, 6 figures
Formation of interstellar complex polycyclic aromatic hydrocarbons: Insights from molecular dynamics simulations of dehydrogenated benzene
Creators: name: Hanine, Meriem
name: Meng, Zhisen
name: Lu, Shiru
name: Xie, Peng
name: Picaud, Sylvain
name: Devel, Michel
name: Wang, Zhao
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Small organic molecules are thought to provide building blocks for the formation of complex interstellar polycyclic aromatic hydrocarbons (PAHs). However, the underlying chemical mechanisms remain unclear, particularly concerning the role of interstellar dust. Using molecular dynamics, we simulate the chemical reaction between dehydrogenated benzene molecules in the gas phase or on the surface of an onion-like carbon nanoparticle (NP). The reaction leads to the formation of PAHs of complex structures. The size of the formed molecules is found to roughly increase with increasing temperature up to 800 K, and to be correlated with the level of dehydrogenation. Morphology analysis features the formation of large rings that contain up to 32 carbon atom at high temperature. Density functional theory (DFT) calculations are performed to search the fundamental energetic reaction pathways. The DFT results quantitatively confirm the correlation between the reactivity and the dehydrogenation level, and the formation of stable C-8 rings. Moreover, the nanostructures formed on the NP surface point to a possible layer-by-layer formation mechanism for interstellar fullerene and carbon onions.
description: 9 figures
Software must be recognised as an important output of scholarly research
Creators: name: Jay, Caroline
name: Haines, Robert
name: Katz, Daniel S.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computers and Society (cs.CY)
subject: Digital Libraries (cs.DL)
subject: FOS: Computer and information sciences

description: Software now lies at the heart of scholarly research. Here we argue that as well as being important from a methodological perspective, software should, in many instances, be recognised as an output of research, equivalent to an academic paper. The article discusses the different roles that software may play in research and highlights the relationship between software and research sustainability and reproducibility. It describes the challenges associated with the processes of citing and reviewing software, which differ from those used for papers. We conclude that whilst software outputs do not necessarily fit comfortably within the current publication model, there is a great deal of positive work underway that is likely to make an impact in addressing this.
description: 6 pages. Submitted to IJDC
Competition of inhomogeneous chiral phases and two-flavor color superconductivity in the NJL model
Creators: name: Lakaschus, Phillip
name: Buballa, Michael
name: Rischke, Dirk H.
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We study the phase structure of the two-flavor Nambu--Jona-Lasinio (NJL) model in the chiral limit, extending a previous study of the competition of an inhomogeneous chiral phase and a two-flavor color-superconducting (2SC) phase [1, 2]. There, an analytic expression for the dispersion relations for quasiparticle excitations in the presence of both a particular inhomogeneous chiral condensate, the so-called chiral density wave (CDW), and a homogeneous 2SC condensate was found. In this work we show how to determine the dispersion relations for arbitrary modulations of the chiral condensate in the presence of a homogeneous 2SC condensate, if the dispersion relations in the absence of color superconductivity are known. In our calculations, we employ two different Ansätze for the inhomogeneous chiral condensate, the CDW as well as the real-kink crystal (RKC). Depending on the value of the diquark coupling we find a region of the phase diagram where the inhomogeneous chiral and the 2SC condensates coexist, confirming results of Refs. [1, 2]. Decreasing the diquark coupling favors the inhomogeneous phase over the coexistence phase. On the other hand, increasing the diquark coupling leads to a larger 2SC phase, while the inhomogeneous chiral and the coexistence phases become smaller. In agreement with previous studies the RKC Ansatz is energetically preferred over the CDW Ansatz. Both Ansätze lead to a qualitatively similar phase diagram, however the coexistence phase is smaller for the RKC Ansatz.
description: contains ancillary files with plot data
Meaning in Animal Communication: Varieties of meaning and their roles in explaining communication
Creators: name: Kalkman, David
Publisher: name: The Australian National University
Year: 2019

description: Why explain the communicative behaviours of animals by invoking the information/meaning 'transmitted' by signals? Why not explain communication in purely causal/functional terms? This thesis addresses active controversy regarding the nature and role of concepts of information, content and meaning in the scientific explanation of animal communication. I defend the methodology of explaining animal communication by invoking the 'meaning' of signals, and responds to worries raised by sceptics of this methodology in the scientific and philosophical literature. This task involves: showing what facts about communication non-informational methodology leaves unexplained; constructing a well-defined theory of content (or 'natural meaning') for most animal signals; and getting clearer on what cognitive capacities, if any, attributing natural meaning to signals implies for senders and receivers. Second, it weighs into comparative debates on human-nonhuman continuity, arguing that there are, in fact, different notions of meaning applicable to human communication that have different consequences for how continuous key aspects of human communication are with other species.
Reproductive and behavioural effects of a GnRH-Targeted immunocontraceptive vaccine in macropodids
Creators: name: Snape, Melissa Alice
Publisher: name: The Australian National University
Year: 2012
Subjects: subject: Macropodidae Reproduction Regulation
subject: Macropus eugenii Behavior
subject: Eastern grey kangaroo Behavior
subject: Luteinizing hormone releasing hormone

description: GnRH-targeted immunocontraception has potential as a non-lethal means of managing overabundant native species in Australia, and also represents a useful tool for studying the key processes within the reproductive endocrine axis. In this thesis, the effects of the GnRH vaccine 'GonaCon(TM)' on peri-pubertal development, growth, adult fertility and social behaviour are examined in two model macropodid species, the tammar wallaby, Macropus eugenii and the eastern grey kangaroo, M. giganteus. Vaccination against GnRH in adult male tammars resulted in rapid testicular atrophy and a loss of fertility for a minimum of two years in association with the production of significant GnRH antibody titres. Puberty was also delayed for a minimum of two years following vaccination of immature males of this species. Male-type growth rates were suppressed in association with depressed testosterone production in males of both age groups, and significant interruptions to both sexual and agonistic behaviours were observed in both adult- and juvenile-treated males. In females, GnRH vaccination effectively suppressed reproduction in 100% of adult female tammars over 5 breeding seasons. Treatment had no apparent effect on lactation but inhibited the production of young from diapausing blastocysts in this group, possibly by via some effect on the corpus luteum of pregnancy. Vaccinated sub-adult female eastern grey kangaroos failed to undergo normal peripubertal development (based on observations of pouch condition) and remained reproductively inactive for the duration of the study (2 1/2 years) - unlike Controls which all produced pouch young. No significant impacts on animal health or welfare were observed during this study however the effects of altered behavioural interactions will need to be re-evaluated on a larger scale to ascertain the potential for any negative impacts on animal welfare or the attainment of management objectives. Based on the long-lasting and highly efficacious results observed, GnRH-targeted immunocontraception would likely be a useful means of managing urban macropodid populations.
Matrix Moments in a Real, Doubly Correlated Algebraic Generalization of the Wishart Model
Creators: name: Guhr, Thomas
name: Schell, Andreas
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mathematical Physics (math-ph)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: The Wishart model of random covariance or correlation matrices continues to find ever more applications as the wealth of data on complex systems of all types grows. The heavy tails often encountered prompt generalizations of the Wishart model, involving algebraic distributions instead of a Gaussian. The mathematical properties pose new challenges, particularly for the doubly correlated versions. Here we investigate such a doubly correlated algebraic model for real covariance or correlation matrices. We focus on the matrix moments and explicitly calculate the first and the second one, the computation of the latter is non-trivial. We solve the problem by relating it to the Aomoto integral and by extending the recursive technique to calculate Ingham-Siegel integrals. We compare our results with the Gaussian case.
description: 21 pages, no figures
Boyajian's Star B: The co-moving stellar companion to KIC 8462852
Creators: name: Pearce, Logan A.
name: Kraus, Adam L.
name: Dupuy, Trent J.
name: Mann, Andrew W.
name: Huber, Daniel
Publisher: name: arXiv
Year: 2021
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: The light curve of KIC 8462852, a.k.a Boyajian's Star, undergoes deep dips the origin of which remains unclear. A faint star $\approx$2\arcsec to the east was discovered in Keck/NIRC2 imaging in Boyajian et al. (2016), but its status as a binary, and possible contribution to the observed variability, was unclear. Here, we use three epochs of Keck/NIRC2 imaging, spanning five years, in JHK near-infrared bands to obtain 1-mas precision astrometry. We show that the two objects exhibit common proper motion, measure a relative velocity of $μ=0.14\pm0.44$ mas yr$^{-1}$ ($μ=0.30\pm0.93$ km s$^{-1}$) and conclude that they are a binary pair at $880\pm10$ AU projected separation. There is marginal detection of possible orbital motion, but our astrometry is insufficient to characterize the orbit. We show that two other point sources are not associated with KIC 8462852. We recommend that attempts to model KIC 8462852 A's light curve should revisit the possibility that the bound stellar companion may play a role in causing the irregular brightness variations, for example through disruption of the orbits of bodies around the primary due to long-term orbital evolution of the binary orbit.
description: 11 pages, 7 figures, 2 tables Accepted for publication in ApJ
Coherent amplification and lasing of weak surface-plasmon polaritons in a negative-index metamaterial with a resonant atomic medium
Creators: name: Asgarnezhad-Zorgabad, Saeid
Publisher: name: arXiv
Year: 2020
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Surface plasmon polaritons (SPPs) lasing requires population inversion, it is inefficient and possesses poor spectral properties. We develop an inversion-less concept for a quantum plasmonic waveguide that exploits unidirectional superradiant SPP emission of radiation to produce intense coherent surface plasmon beams. Our scheme includes a resonantly driven cold atomic medium in a lossless dielectric situated above an ultra-low loss negative index metamaterial~(NIMM) layer. We propose generating unidirectional superradiant radiation of the plasmonic field within an atomic medium and a NIMM layer interface and achieve amplified SPPs by introducing phase-match between the superradiant SPP wave and coupled laser fields. We also establish a parametric resonance between the weak modulated plasmonic field and the collective oscillations of the atomic ensemble, thereby suppressing decoherence of the stably amplified directional polaritonic mode. Our method incorporates the quantum gain of the atomic medium to obtain sufficient conditions for coherent amplification of superradiant SPP waves, and we explore this method to quantum dynamics of the atomic medium being coupled with the weak polaritonic waves. Our waveguide configuration acts as a surface plasmon laser and quantum plasmonic transistor and opens prospects for designing controllable nano-scale lasers for quantum and nano-photonic applications.
The effect of geometry on charge confinement in three dimensions
Creators: name: Sadjadi, H. Mohseni
Publisher: name: arXiv
Year: 2006
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We show that, in contrast to the flat case, the Maxwell theory is not confining in the background of the three dimensional BTZ black-hole (covering space). We also study the effect of the curvature on screening behavior of Maxwell-Chern-Simons model in this space-time.
description: 8 pages. To be published in Europhysics Letters
Formation of Temporally Shaped Electron Bunches for Beam-Driven Collinear Wakefield Accelerators
Creators: name: Tan, Wei-Hou
name: Piot, Philippe
name: Zholents, Alexander
Publisher: name: arXiv
Year: 2021
Subjects: subject: Accelerator Physics (physics.acc-ph)
subject: FOS: Physical sciences

description: Beam-driven collinear wakefield accelerators (CWAs) that operate by using slow-wave structures or plasmas hold great promise toward reducing the size of contemporary accelerators. Sustainable acceleration of charged particles to high energies in the CWA relies on using field-generating relativistic electron bunches with a highly asymmetric peak current profile and a large energy chirp. A new approach to obtaining such bunches has been proposed and illustrated with the accelerator design supported by particle tracking simulations. It has been shown that the required particle distribution in the longitudinal phase space can be obtained without collimators, giving CWAs an opportunity for employment in applications requiring a high repetition rate of operation.
description: 15 pages, 20 figures
Superscaling and neutral current quasielastic neutrino-nucleus scattering
Creators: name: Amaro, J. E.
name: Barbaro, M. B.
name: Caballero, J. A.
name: Donnelly, T. W.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Nuclear Theory (nucl-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The superscaling approach is applied to studies of neutral current neutrino reactions in the quasielastic regime. Using input from scaling analyses of electron scattering data, predictions for high-energy neutrino and antineutrino cross sections are given and compared with results obtained using the relativistic Fermi gas model. The influence of strangeness content inside the nucleons in the nucleus is also explored.
description: 28 pages, 8 figures, accepted for publication in Phys.Rev.C
The effect of zinc orthophosphate and pH/alkalinity adjustment on copper and lead levels in drinking water
Creators: name: Churchill, Diane M.
Publisher: name: University of British Columbia
Year: 2009

description: A twelve month pilot plant study was conducted to evaluate the relative ability of various corrosion control treatments to reduce metal leaching from typical household plumbing materials. A pipe loop system with seven loops, each consisting of lead/tin soldered copper piping, coils of lead/tin solder material and brass faucets, was used to test six treatment options and a control. pH and alkalinity were adjusted by the addition of lime (Ca(OH)2) and sodium bicarbonate (NaHC03) respectively, and two different doses of zinc orthophosphate were tested. Treated water samples, that had been left standing in the pipe loop system for a predetermined time period of eight or sixteen hours, were drawn at regular intervals and measured for lead, copper, and zinc. The results led to the following conclusions. There were some small reductions of lead and copper in the pH/alkalinity loops; however, overall, when compared to the control loop, pH/alkalinity treatment appeared to exacerbate metal leaching in standing samples. Metal levels in the treated loops were very unstable, with some spikes of very high concentrations. It is thought that these high spikes were a result of, not just leached metals, but sloughing off the scale that forms during flowing conditions. The instability of the scale may be related to the high variability of the pH that occurred in the treated loops. The control loop which had relatively stable metal concentrations and no episodes of extremely high metal spiking, maintained a relatively stable pH. The zinc orthophosphate showed good results and was consistently effective at reducing lead and copper levels to below that of the control. The two different standing times showed little difference in the levels of metals that were leached into the water from the pH/alkalinity loops and the lower dose zinc orthophosphate loop. The exception to this, however, was the higher dose zinc orthophosphate loop, which had higher copper and zinc levels at the longer standing time.
Stochastic processes in magnetization reversal involving domain wall motion in magnetic memory elements
Creators: name: Bouquin, Paul
name: Kim, Joo-Von
name: Bultynck, Olivier
name: Rao, Siddharth
name: Couet, Sebastien
name: Kar, Gouri Sankar
name: Devolder, Thibaut
Publisher: name: arXiv
Year: 2020
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: We show experimentally through time-resolved conductance measurements that magnetization reversal through domain wall motion in sub-100 nm diameter magnetic tunnel junctions is dominated by two distinct stochastic effects. The first involves the incubation time related to domain wall nucleation, while the second results from stochastic motion in the Walker regime. Micromagnetics simulations reveal several contributions to temporal pinning of the wall near the disk center, including Bloch point nucleation and wall precession. We show that a reproducible ballistic motion is recovered when Bloch and Néel wall profiles become degenerate in energy in optimally sized disks, which enables quasi-deterministic motion.
Galaxy in public health – the microbial genomics virtual laboratory
Creators: name: Gladman, Simon
name: Nuwan Goonasekera
name: Sloggett, Clare
name: Bulach, Dieter
name: Seemann, Torsten
name: Lonie, Andrew
Publisher: name: F1000Research
Year: 2015

description: Poster describes the Microbial Genomics Virtual Laboratory designed for instantiation on various Cloud architectures. The mGVL image includes: Galaxy, Jupyter Hub, R Studio, Linux command line and Linux virtual desktop. All fully configured for Microbial Genomics. See genome.edu.au for details.
Law and love : the (in)visibility of romantic love in the legal discourse of modern Australian marriage
Creators: name: Grossi, Renata
Publisher: name: The Australian National University
Year: 2018
Subjects: subject: KN172.G76 2011 ANU
subject: Marriage
subject: Marriage law

description: This thesis is about how love, perceived as one of humanity's most powerful emotions, is reflected in law - one of society's most important social discourses. The specific context of this inquiry will be marriage. In the popular discourse of western societies, marriage is steeped in the ideology of romantic love, but to what extent is this view replicated in the legal meaning of marriage? This thesis interrogates four legal episodes which have significantly challenged traditional meanings of marriage in modern Australia, and asks to what extent, and in what form, romantic love features in the construction of those meanings. Marriage has conventionally been understood as a heterosexual relationship between one man and one woman, which has as one of its primary functions the procreation of children. Marriage has also been understood as an economic unit. As such sex, gender, sexuality, procreation, family and economics are all central ideas in marriage. This thesis takes four episodes which question whether sex is part of marriage (R v L); what the relationship between domestic and commercial arrangements are (Garcia); and whether sexual identity, gender and sexuality define marriage (Re Kevin and the same-sex marriage debate). This analysis will show that while romantic love is not altogether invisible in that legal discourse, it does not displace the traditional association of marriage with family, sexual access, procreation and economics. Furthermore when love is visible it is not the liberating, anti-traditional, progressive, radical phenomenon romantic love is often claimed to be; instead we see that love, as per the feminist and queer critiques, is mostly understood as being embedded in very traditional discourses of nature, procreation, domesticity and heterosexuality. Thinking about marriage in the context of love is not a typical legal exercise. Emotions are not usually regarded as relevant for the discipline of law; as such this thesis challenges the positivist rhetoric of law which persistently argues that law is and ought to be separate from emotion. This thesis will show that an emotional inquiry adds much both to the law's understanding of the institution of marriage and to our understanding of the law. This in turn better informs the law to fulfil its regulatory and conflict resolution functions; adds much to our understanding of how law thinks, operates and attributes meanings to social and cultural behaviour; and adds much to the effectiveness of law and its relevance to humanity.
Replication Kit for Bachelor thesis: Usability Evaluation of Car Infotainment in Virtual Reality
Creators: name: Adrian-Luca Stehr
Publisher: name: Zenodo
Year: 2019

description: The zip contains: A readme for important information My Unity project "VehicleProject" My collected XML_A and XML_B for each approach My questionnaire A and questionnaire B My data transferred to Excel My evaluation of the questionnaire in Excel My code to process the XML data + the compiled .class
Negative Longitudinal Magneto-Thermoelectric Power in a Semiconductor Parabolic Quantum Well
Creators: name: Hashimzade, Firudin M.
name: Babayev, Mirbaba M.
name: Hasanov, Khanlar A.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We present a theoretical study of the electronic thermoelectric power of a semiconductor parabolic quantum well in a magnetic field. The case of a longitudinal magnetic field, with respect to the temperature gradient, has been considered. The calculations were carried out taking into account spin-splitting of the dimensionally quantized electronic energy levels. It has been shown that in the region of strong confinement the thermoelectric power decreases with increasing magnetic field, which is related to the downward shift of the lower Zeeman-split spin subband.
description: 11 pages, 1 figire, MISHT-2007 The First International Conference on Material and Information Sciences in High Technologies, Baku, Azerbaijan, September 26-29, 2007
Multi-Modal Saliency Fusion for Illustrative Image Enhancement
Creators: name: Morris, Christopher J.
Publisher: name: Maryland Shared Open Access Repository
Year: 2014
Subjects: augmented reality
computer graphics
image processing
non-photorealistic rendering
visualization

description: Digitally manipulated or augmented images are increasingly prevalent. Multi-sensor systems produce augmented images that integrate data into a single context. Mixed-reality images are generated from the insertion of computer generated objects into a natural scene. Digital processing for application-specific tasks (e.g., compression, network transmission) can create images distorted with processing artifacts. Augmentation of digital images can lead to the inclusion of artifacts that influence the perception of the image. In an augmented image, visual cues (e.g., depth or size cues) may be perceptually inconsistent. A feature deemed important in its local context may not be as important in the broader integrated context. Inserted synthetic objects may not possess the appropriate visual cues for proper perception of the overall scene. In compressed images, finer cues that distinguish critical features may be lost. Enhancing augmented images to add or restore visual cues can improve the image's perceptibility. This dissertation presents a framework for illustrating images to enhance critical features. The enhancements, inspired by an analysis of artists' techniques, bolster the features' perceptual cues and improve the comprehension of the augmented image. The framework uses a linear combination of image (2D), surface topology (3D), and task based saliency measures to identify the critical features in the image. Upon identification, the features are interactively enhanced using a non-photorealistic rendering (NPR) deferred illustration technique. The use of multi-modal saliency allows a visualization designer to adjust the definition of critical features. The proposed framework provides a generalized, flexible, and extensible approach to enhancing salient features in an augmented image. The framework describes a metric, the Saliency Similarity Metric (SSM), for providing feedback on how closely the salient features of the enhanced image match those of the reference image. This feedback can be used for making informed decisions on tuning the visualization. The benefits of the framework are analyzed through objective and subjective evaluations. The evaluations reveal that illustrative enhancements must be carefully applied for perceptual improvement. The framework provides the flexibility necessary to effectively tune the enhancements to a particular task, data set, or user.