cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Viele Wege führen in den Raum. Wie sich ein sozialräumliches Bildungsmonitoring entlang kommunaler Voraussetzungen planen lässt.
Creators: name: Hinzen, Anna
name: Förster, André
Publisher: name: Zenodo
Year: 2024
Subjects: Bildungsmonitoring
Bildungsmanagement
Sozialraum
Sozialraumanalyse
Sozialraummonitoring
Schuleingangsuntersuchung
Schleswig-Holstein
Mecklenburg-Vorpommern
Datenbasiertes Kommunales Bildungsmanagement
DKBM
Transferinitiative Kommunales Bildungsmanagement
Fachnetzwerk für kommunales Bildungsmanagement

description: Präsentation im Themenworkshop "Bildungsmonitoring in Stadt und Land - Potenziale sozialräumlicher Daten" der Transferagentur Nord-Ost am 30. November 2023
Minimum uncertainty states and completeness of non-negative quasi probability of finite-dimensional quantum systems
Creators: name: Hashimoto, T.
name: Hayashi, A.
name: Horibe, M.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We construct minimum-uncertainty states and a non-negative quasi probability distribution for quantum systems on a finite-dimensional space. We reexamine the theorem of Massar and Spindel for the uncertainty relationof the two unitary operators related by the discrete Fourier transformation. It is shown that some assumptions in their proof can be justified by the use of the Perron-Frobenius theorem. The minimum-uncertainty states are the ones that saturate this uncertainty inequality. The continuum limit is closely analyzed by introducing a scale factor in the limiting scheme. Using the minimum-uncertainty states, we construct a non-negative quasi probability distribution. Its marginal distributions are smeared out. However, we show that this quasi probability is optimal in the sense that there does not exist a non-negative quasi probability distribution with sharper marginal properties if the translational covariance in the phase space is assumed. Generally, it is desirable that the quasi probability is complete, i.e., it contains full information of the state. We show that the obtained quasi probability is indeed complete if the dimension of the state space is odd, whereas it is not if the dimension is even.
description: 12 pages, 3 figures; improved presentation, final version
Simplicial Palatini action
Creators: name: Khatsymovsky, V. M.
Publisher: name: arXiv
Year: 2017
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences
subject: 83C27, 53C05

description: We consider the piecewise flat spacetime and a simplicial analog of the Palatini form of the general relativity (GR) action where the discrete Christoffel symbols are given on the tetrahedra as variables that are independent of the metric. Excluding these variables classically gives exactly the Regge action. This paper continues our previous work. Now we include the parity violation term and the analogue of the Barbero-Immirzi parameter introduced in the orthogonal connection form of GR. We consider the path integral and the functional integration over connection. The result of the latter (for certain limiting cases of some parameters) is compared with the earlier found result of the functional integration over connection for the analogous {\it orthogonal} connection representation of Regge action. These results, mainly as some measures on the lengths/areas, are discussed for the possibility of the diagram technique where the perturbative diagrams for the Regge action calculated using the measure obtained are finite. This finiteness is due to these measures providing elementary lengths being mostly bounded and separated from zero, just as finiteness of a theory on a lattice with an analogous probability distribution of spacings.
description: 19 pages, discussion of the finite diagram technique is added
TOXICOLOGICAL PROFILE OF METHANOLIC EXTRACT OF Sterculia setigera FLOWERS ON BIOCHEMICAL PARAMETERS IN WISTAR RATS
Creators: name: Chinda, Bitrus
name: Babalola, Ibrahim Tijjani
name: El-Ishaq, Abubakar
Publisher: name: JSR Unimaid
Year: 2024

description: ABSTRACT

Sterculia setigera Del. is a plant used traditionally to treat different ailments. Presently, scanty information is available on the flower and its safety. The aim of this study is to determine the acute toxicity of the methanolic extract on vital organs and its associated biochemical indices. Fifteen female Wistar Albino rats were divided into five groups of three rats each. Group I served as control, group II, III, IV and V were orally administered daily of crude extract dissolved in distilled water at 5mg/kg BW, 50mg/kg BW, 300mg/kg BW and 1,000mg/kg BW. Rats were observed for 14 days and body weights were recorded. On day 15, the rats were sacrificed and blood samples were collected for biochemical and haematological analysis, while the livers and kidneys were sampled for histopathological examination. Body weight and haematology profile of treated rats showed significance difference (p˂0.05) among means of HCT, MCV, MCHC, PLT and WBC. Histopathology result showed that kidneys appeared normal while livers showed mild periportal infiltration by inflammatory cells and focal mild microvesicular steatosis. However, hepatic enzymes were not significantly affected and no histopathological harmful effects were observed in kidney. In conclusion, methanolic extracts of S. setigera are safe up to 1,000mg/kg BW. The result obtained could be used to justify the folkloric usage of the plant for the treatment of different ailments.

 

 Keywords: Pharmacological; Phytochemical; Medicine; Haematological; Herbal
Unitary Correlation Sets
Creators: name: Harris, Samuel J.
name: Paulsen, Vern I.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Operator Algebras (math.OA)
subject: FOS: Mathematics
subject: 47L25 (Primary), 46L99 (Secondary)

description: The unitary correlation sets defined by the first author in conjunction with tensor products of $\mathcal{U}_{nc}(n)$ are further studied. We show that Connes' embedding problem is equivalent to deciding whether or not two smaller versions of the unitary correlation sets are equal. Moreover, we obtain the result that Connes' embedding problem is equivalent to deciding whether or not two cross norms on $M_n \otimes M_n$ are equal for all $n \geq 2$.
description: 24 pages, fixed a small error in the proof of Theorem 5.3 (v2)
title: Graphic Social Futures
title: Developing Visual Tools for Futures Research
titleType: Subtitle
Creators: name: Pilling, Matthew
Publisher: name: Lancaster University
Year: 2023
Subjects: Social Futures
Design Fiction
Speculative Design
Additive Manufacturing
Visioning
Design Futures
Graphic Futures

description: This thesis seeks to understand how social futures research can be used to engage with, and subsequently involve the public in futures thinking. It has been argued that societies shape themselves partly through the images of the future that they construct. However, the creation of visions and visioning is frequently entangled with commercial and business strategy, and as a result often fails to represent the aspirations of a society. Therefore, what is needed are specific tools to help engage the public in futures research, to help guide discussions, and to reveal the existing underlying social structures, necessary to describe alternative social imaginaries. This research presents a methodology for the creation of graphic social futures, depictions of alternative imaginaries which are themselves socially constructed, using the lens of social futures as distinct from technological futures to engage with the public, to better facilitate discussions around the future of technology and its impact on society. In this instance 3D Printing technology has been used as a driver for change, providing a shared focus for discussions to explore alternative futures. Social futures is an emergent interdisciplinary field that aims to bring about, analyse and emphasise the ways in which social practices, institutes and social groups are organised and reorganised, by strongly emphasising and placing the social into futures thinking. Through the creation of alternative futures, visioning allows us to explore different options and, as a society, negotiate our values and preferences. Design Fiction offers a way of exploring alternative futures, free from commercial influences or constraints, although, these are frequently influenced and informed by those who are deemed to have ‘expertise’ – scientists and technologists, political scientists, economists, but rarely wider publics. Therefore, further work is needed in addressing the issue of how to better engage with the very public that this method is purported to be concerned with. This research contributes to the emergent field of social futures research, through the development and analysis of graphic social futures as a method to democratise the construction and discussion of possible futures. These graphic social futures work by exposing possible flawed futures, and provoking debate on how things could, or should be, and encourages consideration for how we get there.
Les Tatares de Crimée chez Mary Holderness et Lessia Oukraïnka : pour une comparaison des orientalismes au prisme de la question féminine
Creators: name: DZIUB, Nikol
Publisher: name: Zenodo
Year: 2024

description: Proposition de communication pour le colloque "Du grand tour à l’Orient-Express : curiosité, exploration, sociabilité" (From the Grand Tour to Orient-Express: Curiosity, Exploration, Sociability) qui se tiendra les 25 et 26 mars 2024 à l'Inalco.

 

 

Proposal part of the “Gender and Nation in the Biographical Interpretations of Lesya Ukrainka’s Life and Works: Ukraine-Russian Empire-USSR, 1898-2022” Project (Departement Geschichte, Bereich Osteuropäische Geschichte, University of Basel, SNSF Postdoctoral fellowship)
The waves of the hills: community and radio in the everyday life of a Brazilian favela
Creators: name: Medrado, Andrea
Publisher: name: University of Westminster
Year: 2010

description: This thesis is a study of the everyday listening to community radio by residents of Pau da Lima, a working class neighbourhood with several favela areas, located in Salvador, Brazil. Drawing from ethnographic data, this project aims at exploring residents’ listening experiences of community radio, focusing on how they use community radio programmes, assessing to what extent these programmes represent a public (social, political or familial) resource for its audiences. In order to privilege depth over breadth, as it is the case with ethnographic work, the fieldwork was carried out in one community: Pau da Lima. The focus has been laid on the community rather than on the radio stations, and on the audiences rather than the producers. This was informed by the recognition that little attention has been devoted to the listening dimension of community radio. Thus, my research offers an important contribution to knowledge by bridging this research gap. In addition, this research brings in a methodological innovation to the study of community radio. Being able to capture the richness of everyday life, it aims at offering a nuanced analysis of the place of community radio in the favela. The thesis explores the private and public dimensions of community radio listening, observing its use as a resource in the homes but also on the streets. In the context of the favelas, community radio programming is widely aired through street loudspeakers, making an interesting case study of radio’s use in public spaces and challenging the well-accepted perspective of the medium as being essentially individual and domestic. The cacophony of the densely populated favela implies that one needs to attend closely to the conditions of reception and, specifically, how listening to radio in this context, needs to be understood as part of a continuous and complex spectrum of auditory culture.
Factors Associated with Caregivers’ Responses to Individuals Affected by Eating Disorders
Creators: name: Rothwell, Emily
Publisher: name: Lancaster University
Year: 2023
Subjects: Eating disorders
Accommodation and enabling behaviours
Carer
Expressed emotion

description: Eating disorders can impact the whole family. Caregivers may engage in certain behaviours, termed accommodation and enabling behaviours, as an attempt to reduce conflict. Whilst understandable, the cognitive interpersonal maintenance model suggests that engaging in these behaviours may inadvertently maintain the eating disorder. This can become a vicious cycle. The emotional climate of families can be measured by the construct of expressed emotion (EE). High familial EE is associated with poorer treatment outcomes, as well as increased caregiver distress. It is therefore important to understand factors which are associated with accommodation and enabling behaviours, and EE, in families affected by eating disorders. Section One of this thesis is comprised of a systematic literature review, which explores the factors associated with/correlates of accommodation and enabling behaviours in caregivers of individuals affected by an eating disorder. Factors associated with both the caregiver and the person affected were identified, which can be used to identify caregivers who may be more vulnerable to engaging in accommodation. This provides valuable information regarding the targeting of support to relevant caregivers. Section Two reports an empirical study investigating the relationship between guilt, shame, blame, EE and self-compassion, in caregivers of those affected by eating disorders. It also examines whether self-compassion moderates the relationship between guilt/shame/blame and EE. Emotional overinvolvement (EOI), one component of EE, was positively associated with guilt and shame, and negatively associated with self-compassion. Guilt predicted EOI once other variables had been accounted for. Critical comments, a second component of EE, had a significant positive association with guilt, shame and blame. Blame was the only significant predictor of criticism when other factors had been accounted for. There were no significant moderating effects of self-compassion. Section Three considers the implications of these findings, and the importance of language when discussing these themes.
Le Holodomor, ou les angles morts des voyages et des reportages en URSS (Gide, Bourke-White, Abbe)
Creators: name: DZIUB, Nikol
Publisher: name: Zenodo
Year: 2024

description: Proposition de communication pour le colloque« Raconter et dire le Holodomor. Quand la littérature fait histoire »

 

Paper proposal for the conference"Telling the story of the Holodomor. When literature makes history".

 

 

Linked to the “Gender and Nation in the Biographical Interpretations of Lesya Ukrainka’s Life and Works: Ukraine-Russian Empire-USSR, 1898-2022” Project (Departement Geschichte, Bereich Osteuropäische Geschichte, University of Basel, SNSF Postdoctoral fellowship)
A note on the bijectivity of antipode of a Hopf algebra and its applications
Creators: name: Lv, Jiafeng
name: Oh, Sei-Qwon
name: Wang, Xingting
name: Yu, Xiaolan
Publisher: name: arXiv
Year: 2017
Subjects: subject: Rings and Algebras (math.RA)
subject: FOS: Mathematics
subject: 16E65, 16W30, 16W35

description: Certain sufficient homological and ring-theoretical conditions are given for a Hopf algebra to have bijective antipode with applications to noetherian Hopf algebras regarding their homological behaviors.
description: 14 pages
Separable equivalence, complexity and representation type
Creators: name: Peacock, Simon F
Publisher: name: arXiv
Year: 2017
Subjects: subject: Representation Theory (math.RT)
subject: FOS: Mathematics

description: We generalise the notion of separable equivalence, originally presented by Linckelmann (2011), to an equivalence relation on additive categories. We use this generalisation to show that from an initial equivalence between two algebras we may build equivalences between many related categories. We also show that separable equivalence preserves the representation type of an algebra. This generalises Linckelmann's result, where he showed this in the case of symmetric algebras. We use these theorems to show that the group algebras of several small cyclic groups cannot be separably equivalent. This gives several examples of algebras that have the same complexity but are not separably equivalent.
Faithful Actions from Hyperplane Arrangements
Creators: name: Hirano, Yuki
name: Wemyss, Michael
Publisher: name: arXiv
Year: 2016
Subjects: subject: Algebraic Geometry (math.AG)
subject: Algebraic Topology (math.AT)
subject: Representation Theory (math.RT)
subject: FOS: Mathematics

description: We show that if $X$ is a smooth quasi-projective $3$-fold admitting a flopping contraction, then the fundamental group of an associated simplicial hyperplane arrangement acts faithfully on the derived category of $X$. The main technical advance is to use torsion pairs as an efficient mechanism to track various objects under iterations of the flop functor (respectively, mutation functor). This allows us to relate compositions of the flop functor (respectively, mutation functor) to the theory of Deligne normal form, and to give a criterion for when a finite composition of $3$-fold flops can be understood as a tilt at a single torsion pair. We also use this technique to give a simplified proof of the result of Brav-Thomas for Kleinian singularities.
description: Example 2.15 corrected, plus other minor corrections. To appear G&T
TPS talk: Open Science should not be a hobby
Creators: name: Plomp, Esther
Publisher: name: Zenodo
Year: 2022
Subjects: Open Science
Inclusive Research Culture
Research Assesment
Open Research

description: Talk by Esther Plomp for the Tools, Practices and Systems programme on the 27th of October, 2022. This talk is based on a blogpost: 'Open Science should not be a hobby'.
Stability and sparsity in sets of natural numbers
Creators: name: Conant, Gabriel
Publisher: name: arXiv
Year: 2017
Subjects: subject: Logic (math.LO)
subject: Number Theory (math.NT)
subject: FOS: Mathematics

description: Given a set $A\subseteq\mathbb{N}$, we consider the relationship between stability of the structure $(\mathbb{Z},+,0,A)$ and sparsity of the set $A$. We first show that a strong enough sparsity assumption on $A$ yields stability of $(\mathbb{Z},+,0,A)$. Such sets include examples considered by Palacín and Sklinos and Poizat, many classical linear recurrence sequences (e.g. the Fibonaccci numbers), and any set in which the limit of ratios of consecutive elements diverges. Finally, we consider sparsity conclusions on sets $A\subseteq\mathbb{N}$, which follow from model theoretic assumptions on $(\mathbb{Z},+,0,A)$. We use a result of Erdős, Nathanson, and Sárközy to show that if $(\mathbb{Z},+,0,A)$ does not define the ordering on $\mathbb{Z}$, then the lower asymptotic density of any finitary sumset of $A$ is zero. Finally, in a theorem communicated to us by Goldbring, we use a result of Jin to show that if $(\mathbb{Z},+,0,A)$ is stable, then the upper Banach density of any finitary sumset of $A$ is zero.
description: 27 pages; final version incorporating referee comments
Super-Eddington Accretion onto the Neutron Star NGC 7793 P13: Broadband X-ray Spectroscopy and Ultraluminous X-ray Sources
Creators: name: Walton, D. J.
name: Fuerst, F.
name: Harrison, F. A.
name: Stern, D.
name: Bachetti, M.
name: Barret, D.
name: Brightman, M.
name: Fabian, A. C.
name: Middleton, M. J.
name: Ptak, A.
name: Tao, L.
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We present a detailed, broadband X-ray spectral analysis of the ULX pulsar NGC 7793 P13, a known super-Eddington source, utilizing data from the $XMM$-$Newton$, $NuSTAR$ and $Chandra$ observatories. The broadband $XMM$-$Newton+NuSTAR$ spectrum of P13 is qualitatively similar to the rest of the ULX sample with broadband coverage, suggesting that additional ULXs in the known population may host neutron star accretors. Through time-averaged, phase-resolved and multi-epoch studies, we find that two non-pulsed thermal blackbody components with temperatures $\sim$0.5 and $\sim$1.5 keV are required to fit the data below 10 keV, in addition to a third continuum component which extends to higher energies and is associated with the pulsed emission from the accretion column. The characteristic radii of the thermal components appear to be similar, and are too large to be associated with the neutron star itself, so the need for two components likely indicates the accretion flow outside the magnetosphere is complex. We suggest a scenario in which the thick inner disc expected for super-Eddington accretion begins to form, but is terminated by the neutron star's magnetic field soon after its onset, implying a limit of $B \lesssim 6 \times 10^{12}$ G for the dipolar component of the central neutron star's magnetic field. Evidence of similar termination of the disc in other sources may offer a further means of identifying additional neutron star ULXs. Finally, we examine the spectrum exhibited by P13 during one of its unusual 'off' states. These data require both a hard powerlaw component, suggesting residual accretion onto the neutron star, and emission from a thermal plasma, which we argue is likely associated with the P13 system.
description: 17 pages, 12 figures, accepted for publication in MNRAS
Hierarchical analysis of gravitational-wave measurements of binary black hole spin-orbit misalignments
Creators: name: Stevenson, Simon
name: Berry, Christopher P. L.
name: Mandel, Ilya
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Binary black holes may form both through isolated binary evolution and through dynamical interactions in dense stellar environments. The formation channel leaves an imprint on the alignment between the black hole spins and the orbital angular momentum. Gravitational waves from these systems directly encode information about the spin--orbit misalignment angles, allowing them to be (weakly) constrained. Identifying sub-populations of spinning binary black holes will inform us about compact binary formation and evolution. We simulate a mixed population of binary black holes with spin--orbit misalignments modelled under a range of assumptions. We then develop a hierarchical analysis and apply it to mock gravitational-wave observations of these populations. Assuming a population with dimensionless spin magnitudes of $χ= 0.7$, we show that tens of observations will make it possible to distinguish the presence of subpopulations of coalescing binary black holes based on their spin orientations. With $100$ observations it will be possible to infer the relative fraction of coalescing binary black holes with isotropic spin directions (corresponding to dynamical formation in our models) with a fractional uncertainty of $\sim 40\%$. Meanwhile, only $\sim 5$ observations are sufficient to distinguish between extreme models---all binary black holes either having exactly aligned spins or isotropic spin directions.
description: 12 pages, 9 figures. Updated to match version published in MNRAS as 10.1093/mnras/stx1764
Paradigms in Caribbean trade diplomacy: negotiating the CARIFORUM–EC Free Trade Agreement
Creators: name: Miller, Keste
Publisher: name: University of Westminster
Year: 2010

description: The CARIFORUM States in signing the Economic Partnership Agreement (EPA) with the European Community on the 15the October, 2008 in Bridgetown Barbados have demonstrated a bold step by a group of Small Developing Island States (SIDS) on the trail of the emerging global trade regime because, notwithstanding the levels of economic disparity between the two sides, the Caribbean accepted the unequal nature of the partnership in a pragmatic and constructive sense. The region’s negotiators skilfully used the asymmetry of power dynamics of the European Community and the global trade inertia to craft a deal and carved a way forward for themselves which gave practical application to the realist theory of International relations in the context of international bargaining with domestic constraints. They have illuminated a paradigm shift towards a new era in which small vulnerable developing states can become proactive in order to protect their vital commercial interests. The CARIFORUM-EU Economic Partnership is one of the most innovative and farreaching Free Trade Agreement ever entered into in the context of North-South relations. So unique and innovative are the arrangements that they now evidenced the new paradigm and a model for future Free Trade Agreement, not just between Europe and the rest of the developing world but, among developing countries themselves. It also has implications for the multilateral system in the context of the Doha Round of negotiation. The research contributes to knowledge by illustrating the application of an adapted combination of the classical co-operative and non- cooperative models of coalition bargaining developed by John Nash and the Thomas Schelling’s model analyzed in the context of Robert Putman’s games theory are very relevant in explaining the Paradigms in Caribbean trade diplomacy and how the regions succeeded in leveraging concessions in negotiating the CARIFORUM–EC Free Trade Agreement. The work places the asymmetric problems of the CARIFORUM States in the context of their need for a specific outcome in light of their national interests and the EC’s desire to negotiate a new trade arrangement in keeping with the demands of its own domestic constituents and their wider international trade agenda. Finally, the work challenges the assertions that the EC in International Trade Negotiations uses its superior negotiating machinery and strength of its markets as secured vehicles to influence and impose its external trade policies on developing countries and further that the ACP States are reactive in character.
In-vivo biomagnetic characterisation of the American cockroach
Creators: name: Kong, Ling-Jun
name: Crepaz, Herbert
name: Górecka, Agnieszka
name: Urbanek, Aleksandra
name: Dumke, Rainer
name: Paterek, Tomasz
Publisher: name: arXiv
Year: 2017
Subjects: subject: Biological Physics (physics.bio-ph)
subject: FOS: Physical sciences

description: We present a quantitative method, utilising a highly sensitive quantum sensor, that extends applicability of magnetorelaxometry to biological samples at physiological temperature. The observed magnetic fields allow for non-invasive determination of physical properties of magnetic materials and their surrounding environment inside the specimen. The method is applied to American cockroaches and reveals magnetic deposits with strikingly different behaviour in alive and dead insects. We discuss consequences of this finding to cockroach magneto-reception. To our knowledge, this work represents the first characterisation of the magnetisation dynamics in live insects and helps to connect results from behavioural experiments on insects in magnetic fields with characterisation of magnetic materials in their corpses.
description: 10 pages, 5 figures, published version
Recent Research in Humanities and Social Science
Creators: name: Prof. Jahan Ara
name: Dr. Mirza Mohammad Abu Tayyab
Publisher: name: Zenodo
Year: 2023

description: This Edited book “Recent Research in Humanities and Social Science” is based on the proceedings of the “2nd Online International Conference on Advance Interdisciplinary Research (ICAIR-2023)”, Jointly Organized by Digvijay Nath Post Graduate College, Gorakhpur, U.P. & Science-Tech Institute run by Manraj Kuwar Singh Educational Society, Lucknow, U.P. during April 07 -09, 2023. The aim of this conference was to bring together the young as well as experienced researchers on one platform to discuss the recent findings in the aforesaid areas of Physical and Chemical Sciences. After peer reviewing process, relevant research papers were finally included in this book as chapters. The present volume is based on the contributions made by various authors on different important topic of “Recent Research in Humanities and Social Science” and introduces the subject along the following topics: Semantics Cohesive Devices in Compositions: The case of Arab EFL learners; Indian Census 2021: Impact of COVID-19 on its Operation & Implementation; The Rising Effects of Social Media on Youth; Development of Modules for Understanding the Concept of Staff MEETING among B. Ed. Student-Teachers; Development of Co-operative Movement in India; Ideas for Humanism; within the Perspective of Buddhism; China and International Law and Order: A Case Study of South China Sea and Indian Ocean Region; The Mechanism of Aristotle’s Categories in the Study of Knowledge: An Epistemological Appraisal; Lived Experiences of Incarceration: A narrative review; and The Impact of Poverty on Education in India.
Reconfigurable cluster state generation in specially poled nonlinear waveguide arrays
Creators: name: Titchener, James G.
name: Solntsev, Alexander S.
name: Sukhorukov, Andrey A.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Optics (physics.optics)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We present a new approach for generating cluster states on-chip, with the state encoded in the spatial component of the photonic wavefunction. We show that for spatial encoding, a change of measurement basis can improve the practicality of cluster state algorithm implementation, and demonstrate this by simulating Grover's search algorithm. Our state generation scheme involves shaping the wavefunction produced by spontaneous parametric down-conversion in on-chip waveguides using specially tailored nonlinear poling patterns. Furthermore the form of the cluster state can be reconfigured quickly by driving different waveguides in the array.
description: 5 pages, 5 figures
SKA Aperture Array Verification System: Electromagnetic modeling and beam pattern measurements using a micro UAV
Creators: name: Acedo, E. de Lera
name: Bolli, P.
name: Paonessa, F.
name: Virone, G.
name: Colin-Beltran, E.
name: Razavi-Ghods, N.
name: Aicardi, I.
name: Lingua, A.
name: Maschio, P.
name: Monari, J.
name: Naldi, G.
name: Piras, M.
name: Pupillo, G.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: In this paper we present the electromagnetic modeling and beam pattern measurements of a 16-elements ultra wideband sparse random test array for the low frequency instrument of the Square Kilometer Array telescope. We discuss the importance of a small array test platform for the development of technologies and techniques towards the final telescope, highlighting the most relevant aspects of its design. We also describe the electromagnetic simulations and modeling work as well as the embedded-element and array pattern measurements using an Unmanned Aerial Vehicle system. The latter are helpful both for the validation of the models and the design as well as for the future instrumental calibration of the telescope thanks to the stable, accurate and strong radio frequency signal transmitted by the UAV. At this stage of the design, these measurements have shown a general agreement between experimental results and numerical data and have revealed the localized effect of un-calibrated cable lengths in the inner side-lobes of the array pattern.
description: 19 pages, 17 figures. Accepted in Experimental Astronomy
Weak amenability of Lie groups made discrete
Creators: name: Knudby, Søren
Publisher: name: arXiv
Year: 2016
Subjects: subject: Functional Analysis (math.FA)
subject: Group Theory (math.GR)
subject: Operator Algebras (math.OA)
subject: FOS: Mathematics

description: We completely characterize connected Lie groups all of whose countable subgroups are weakly amenable. We also provide a characterization of connected semisimple Lie groups that are weakly amenable. Finally, we show that a connected Lie group is weakly amenable if the group is weakly amenable as a discrete group.
description: Final version. To appear in Pacific Journal of Mathematics
Effects of boundary conditions and gradient flow in 1+1 dimensional lattice $ϕ^4$ theory
Creators: name: Harindranath, A.
name: Maiti, Jyotirmoy
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In this work we study the effects of gradient flow and open boundary condition in the temporal direction in 1+1 dimensional lattice $ϕ^4$ theory. Simulations are performed with periodic (PBC) and open (OPEN) boundary conditions in the temporal direction. The Effects of gradient flow and open boundary on the field $ϕ$ and the susceptibility are studied in detail along with the finite size scaling analysis. In both cases, at a given volume, the phase transition point is shifted towards a lower value of lattice coupling $λ_0$ for fixed $m_0^2$ in the case of OPEN as compared to PBC with this shift found to be diminishing as volume increases. We compare and contrast the extraction of the boson mass from the two point function (PBC) and the one point function (OPEN) as the coupling, starting from moderate values, approaches the critical value corresponding to the vanishing of the mass gap. In the critical region, boundary artifacts become dominant in the latter. Our studies point towards the need for a detailed finite volume (scaling) analysis of the effects of OPEN in the critical region.
description: 18 pages, 19 figures. Replaced with the published version
Localic completion of uniform spaces
Creators: name: Kawai, Tatsuji
Publisher: name: arXiv
Year: 2017
Subjects: subject: General Topology (math.GN)
subject: Logic in Computer Science (cs.LO)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences
subject: 03F60, 06D22, 54E45, 54E15

description: We extend the notion of localic completion of generalised metric spaces by Steven Vickers to the setting of generalised uniform spaces. A generalised uniform space (gus) is a set X equipped with a family of generalised metrics on X, where a generalised metric on X is a map from the product of X to the upper reals satisfying zero self-distance law and triangle inequality. For a symmetric generalised uniform space, the localic completion lifts its generalised uniform structure to a point-free generalised uniform structure. This point-free structure induces a complete generalised uniform structure on the set of formal points of the localic completion that gives the standard completion of the original gus with Cauchy filters. We extend the localic completion to a full and faithful functor from the category of locally compact uniform spaces into that of overt locally compact completely regular formal topologies. Moreover, we give an elementary characterisation of the cover of the localic completion of a locally compact uniform space that simplifies the existing characterisation for metric spaces. These results generalise the corresponding results for metric spaces by Erik Palmgren. Furthermore, we show that the localic completion of a symmetric gus is equivalent to the point-free completion of the uniform formal topology associated with the gus. We work in Aczel's constructive set theory CZF with the Regular Extension Axiom. Some of our results also require Countable Choice.
description: 39 pages
Conflict-Free Coloring of Planar Graphs
Creators: name: Abel, Zachary
name: Alvarez, Victor
name: Gour, Aman
name: Hesterberg, Adam
name: Demaine, Erik D.
name: Fekete, Sándor P.
name: Keldenich, Phillip
name: Scheffer, Christian
Publisher: name: arXiv
Year: 2017
Subjects: subject: Discrete Mathematics (cs.DM)
subject: Data Structures and Algorithms (cs.DS)
subject: Combinatorics (math.CO)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics
subject: G.2.2; F.2.2

description: A conflict-free k-coloring of a graph assigns one of k different colors to some of the vertices such that, for every vertex v, there is a color that is assigned to exactly one vertex among v and v's neighbors. Such colorings have applications in wireless networking, robotics, and geometry, and are well-studied in graph theory. Here we study the natural problem of the conflict-free chromatic number chi_CF(G) (the smallest k for which conflict-free k-colorings exist). We provide results both for closed neighborhoods N[v], for which a vertex v is a member of its neighborhood, and for open neighborhoods N(v), for which vertex v is not a member of its neighborhood. For closed neighborhoods, we prove the conflict-free variant of the famous Hadwiger Conjecture: If an arbitrary graph G does not contain K_{k+1} as a minor, then chi_CF(G) <= k. For planar graphs, we obtain a tight worst-case bound: three colors are sometimes necessary and always sufficient. We also give a complete characterization of the computational complexity of conflict-free coloring. Deciding whether chi_CF(G)<= 1 is NP-complete for planar graphs G, but polynomial for outerplanar graphs. Furthermore, deciding whether chi_CF(G)<= 2 is NP-complete for planar graphs G, but always true for outerplanar graphs. For the bicriteria problem of minimizing the number of colored vertices subject to a given bound k on the number of colors, we give a full algorithmic characterization in terms of complexity and approximation for outerplanar and planar graphs. For open neighborhoods, we show that every planar bipartite graph has a conflict-free coloring with at most four colors; on the other hand, we prove that for k in {1,2,3}, it is NP-complete to decide whether a planar bipartite graph has a conflict-free k-coloring. Moreover, we establish that any general} planar graph has a conflict-free coloring with at most eight colors.
description: 30 pages, 17 figures; full version (to appear in SIAM Journal on Discrete Mathematics) of extended abstract that appears in Proceeedings of the Twenty-Eighth Annual ACM-SIAM Symposium on Discrete Algorithms (SODA 2017), pp. 1951-1963
Operational Decision Tools for SMART Emergency Medical Services
Creators: name: Roa, Juan Camilo Paz
Publisher: name: Purdue University Graduate School
Year: 2023
Subjects: Industrial engineering

description: Smart and connected technology solutions have emerged as a promising way to enhance EMS services, particularly in areas where access to professional services is limited. However, a significant challenge for improving their implementation is determining which technologies to use and how they will change current logistic operations to enhance service efficiencies and expand access to care. In this context, this thesis explores opportunities for the smart and connected technology solutions. The first study explores the use of medically trained volunteers in the community, known as Citizen Responders (CRs). These individuals can be quickly notified of an EMS request upon its arrival via a mobile alert receiver, which allows them to provide timely and potentially life-saving assistance before an ambulance arrives. However, traditional EMS logistic decision platforms are not equipped to effectively leverage the sharing of the real-time CR information enabled by connected technologies, such as their location and availability. To improve coordination between CRs and ambulances, this study proposes two decision tools that incorporate real-time CR information: one for redeploying ambulances after they complete service and another for dispatching ambulances in response to calls. The redeployment procedure uses mixed-integer linear programming (MILP) to maximize patient survival, while the dispatch procedure enhances a locally optimal dispatch procedure by integrating real-time CR information for priority-differentiated emergencies. In the second study, a third decision tool was developed to take advantage of the increasing availability of feature information provided by connected technologies: an AI-enabled dispatch rule recommendation model that is more usable for dispatchers than black-box decision models. This is a model based on supervised learning that outputs a “promising” metric-based dispatch rule for the human decision-maker. The model maintains the usability of rules while enhancing the system’s performance and alleviating the cognitive burden of dispatchers. A set of experiments were performed on a self-developed simulator to assess the performance of all the decision tools. The findings suggest they have the potential to significantly enhance the EMS system performance.
Riemannian stochastic variance reduced gradient algorithm with retraction and vector transport
Creators: name: Sato, Hiroyuki
name: Kasai, Hiroyuki
name: Mishra, Bamdev
Publisher: name: arXiv
Year: 2017
Subjects: subject: Machine Learning (cs.LG)
subject: Optimization and Control (math.OC)
subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics

description: In recent years, stochastic variance reduction algorithms have attracted considerable attention for minimizing the average of a large but finite number of loss functions. This paper proposes a novel Riemannian extension of the Euclidean stochastic variance reduced gradient (R-SVRG) algorithm to a manifold search space. The key challenges of averaging, adding, and subtracting multiple gradients are addressed with retraction and vector transport. For the proposed algorithm, we present a global convergence analysis with a decaying step size as well as a local convergence rate analysis with a fixed step size under some natural assumptions. In addition, the proposed algorithm is applied to the computation problem of the Riemannian centroid on the symmetric positive definite (SPD) manifold as well as the principal component analysis and low-rank matrix completion problems on the Grassmann manifold. The results show that the proposed algorithm outperforms the standard Riemannian stochastic gradient descent algorithm in each case.
description: Published in SIAM Journal on Optimization. Extended and revised version of arXiv:1605.07367
Onset of many-body chaos in the $O(N)$ model
Creators: name: Chowdhury, Debanjan
name: Swingle, Brian
Publisher: name: arXiv
Year: 2017
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: High Energy Physics - Theory (hep-th)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The growth of commutators of initially commuting local operators diagnoses the onset of chaos in quantum many-body systems. We compute such commutators of local field operators with $N$ components in the $(2+1)$-dimensional $O(N)$ nonlinear sigma model to leading order in $1/N$. The system is taken to be in thermal equilibrium at a temperature $T$ above the zero temperature quantum critical point separating the symmetry broken and unbroken phases. The commutator grows exponentially in time with a rate denoted $λ_L$. At large $N$ the growth of chaos as measured by $λ_L$ is slow because the model is weakly interacting, and we find $λ_L \approx 3.2 T/N$. The scaling with temperature is dictated by conformal invariance of the underlying quantum critical point. We also show that operators grow ballistically in space with a "butterfly velocity" given by $v_B/c \approx 1$ where $c$ is the Lorentz-invariant speed of particle excitations in the system. We briefly comment on the behavior of $λ_L$ and $v_B$ in the neighboring symmetry broken and unbroken phases.
description: (1+55) pages, 13 figures; (v2) Final published version
Microbiological risk assessment of meat and seafoods
Creators: name: Sumner, JL
Publisher: name: University of Tasmania
Year: 2023

description: This thesis summarises elements of more than half a century of my work as an academic and as a consultant. It has been influenced by numerous events, responses and developments, to which I refer as footnotes. Of these, three developments have been pivotal: the Hazard Analysis Critical Control Point (HACCP) concept, Quality Assurance (QA) and Predictive Microbiology. These are key elements of the discipline of Risk Assessment, which is the subject of this thesis - my involvement with risk assessments for the seafood and meat industries. However, underpinning any credible risk estimate is knowledge of the food process, the supply chain and information about how pathogens behave through that chain. These are the"hard yards" of risk assessment, without which modelers must rely on assumptions which, as we saw with early estimates of Covid illness and death, may be orders of magnitude from reality.
A Unified Method of Detecting Core-Periphery Structure and Community Structure in Networks
Creators: name: Xiang, Bing-Bing
name: Bao, Zhong-Kui
name: Ma, Chuang
name: Zhang, Xingyi
name: Chen, Han-Shuang
name: Zhang, Hai-Feng
Publisher: name: arXiv
Year: 2016
Subjects: subject: Physics and Society (physics.soc-ph)
subject: Social and Information Networks (cs.SI)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: Core-periphery structure and community structure are two typical meso-scale structures in complex networks. Though the community detection has been extensively investigated from different perspectives, the definition and the detection of core-periphery structure have not received much attention. Furthermore, the detection problems of the core-periphery and community structure were separately investigated. In this paper, we develop a unified framework to simultaneously detect core-periphery structure and community structure in complex networks. Moreover, there are several extra advantages of our algorithm: our method can detect not only single but also multiple pairs of core-periphery structures; the overlapping nodes belonging to different communities can be identified; different scales of core-periphery structures can be detected by adjusting the size of core. The good performance of the method has been validated on synthetic and real complex networks. So we provide a basic framework to detect the two typical meso-scale structures: core-periphery structure and community structure.
description: 10 figures. Accepted by Chaos
Historic Emergence of Diversity in Painting: Heterogeneity in Chromatic Distance in Images and Characterization of Massive Painting Data Set
Creators: name: Lee, Byunghwee
name: Kim, Daniel
name: Sun, Seunghye
name: Jeong, Hawoong
name: Park, Juyong
Publisher: name: arXiv
Year: 2017
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Physics and Society (physics.soc-ph)
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences

description: Painting is an art form that has long functioned as a major channel for the creative expression and communication of humans, its evolution taking place under an interplay with the science, technology, and social environments of the times. Therefore, understanding the process based on comprehensive data could shed light on how humans acted and manifested creatively under changing conditions. Yet, there exist few systematic frameworks that characterize the process for painting, which would require robust statistical methods for defining painting characteristics and identifying human's creative developments, and data of high quality and sufficient quantity. Here we propose that the color contrast of a painting image signifying the heterogeneity in inter-pixel chromatic distance can be a useful representation of its style, integrating both the color and geometry. From the color contrasts of paintings from a large-scale, comprehensive archive of 179,853 high-quality images spanning several centuries we characterize the temporal evolutionary patterns of paintings, and present a deep study of an extraordinary expansion in creative diversity and individuality that came to define the modern era.
description: 11 pages, 7 figures