cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
The Lieb-Schultz-Mattis Theorem: A Topological Point of View
Creators: name: Tasaki, Hal
Publisher: name: arXiv
Year: 2022
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Mathematical Physics (math-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We review the Lieb-Schultz-Mattis theorem and its variants, which are no-go theorems that state that a quantum many-body system with certain conditions cannot have a locally-unique gapped ground state. We restrict ourselves to one-dimensional quantum spin systems and discuss both the generalized Lieb-Schultz-Mattis theorem for models with U(1) symmetry and the extended Lieb-Schultz-Mattis theorem for models with discrete symmetry. We also discuss the implication of the same arguments to systems on the infinite cylinder, both with the periodic boundary conditions and with the spiral boundary conditions. For models with U(1) symmetry, we here present a rearranged version of the original proof of Lieb, Schultz, and Mattis based on the twist operator. As the title suggests we take a modern topological point of view and prove the generalized Lieb-Schultz-Mattis theorem by making use of a topological index (which coincides with the filling factor). By a topological index, we mean an index that characterizes a locally-unique gapped ground state and is invariant under continuous (or smooth) modification of the ground state. For models with discrete symmetry, we describe the basic idea of the most general proof based on the topological index introduced in the context of symmetry-protected topological phases. We start from background materials such as the classification of projective representations of the symmetry group. We also review the notion that we call a locally-unique gapped ground state of a quantum spin system on an infinite lattice and present basic theorems. This notion turns out to be natural and useful from the physicists' point of view. We have tried to make the present article readable and almost self-contained. We only assume basic knowledge about quantum spin systems.
description: 28 pages, 8 figures, this is the final version
High definition magnetic and gravity prospecting at Fosterville
Creators: name: Gozlan, Eric .
Publisher: name: Monash University
Year: 2022

description: This thesis was scanned from the print manuscript for digital preservation and is copyright the author.
 Researchers can access this thesis by asking their local university, institution or public library to
 make a request on their behalf. Monash staff and postgraduate students can use the link in the References field.
Warm dark matter sterile neutrinos in electron capture and beta decay spectra
Creators: name: Moreno, O.
name: de Guerra, E. Moya
name: Medrano, M. Ramón
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We briefly review the motivation to search for sterile neutrinos in the keV mass scale, as dark matter candidates, and the prospects to find them in beta decay or electron capture spectra, with a global perspective. We describe the fundamentals of the neutrino flavor-mass eigenstate mismatch that opens the possibility of detecting sterile neutrinos in such ordinary nuclear processes. Results are shown and discussed for the effect of heavy neutrino emission in electron capture in Holmium 163 and in two isotopes of Lead, 202 and 205, as well as in the beta decay of Tritium. We study the de-excitation spectrum in the considered cases of electron capture and the charged lepton spectrum in the case of Tritium beta decay. For each of these cases, we define ratios of integrated transition rates over different regions of the spectrum under study, and give new results that may guide and facilitate the analysis of possible future measurements, paying particular attention to forbidden transitions in Lead isotopes.
description: 13 pages, 4 figures, 2 tables
State Reproductive Coercion As Structural Violence
Creators: name: DeJoy, Gianna
Publisher: name: Columbia Social Work Review
Year: 2019

description: Violence against women and other marginalized groups takes many forms among individuals and in society. The coexistence of interpersonal and structural violence is especially pronounced in the realm of reproductive autonomy. Reproductive coercion, a form of intimate partner violence,nds its structural-level twin in state policies on reproductive health carethat are coercive in impact. Communities that are already underservedby the health care system and disproportionately a ected by anti-choicereproductive health policies—including women of color, young women, low- income women, and undocumented women—are also the most at risk of reproductive coercion (Katz & Tirone, 2015).
description: Columbia Social Work Review, Vol 17 No 1 (2019)
Exponential BGK Integrator for Multi-Scale Particle-Based Kinetic Simulations
Creators: name: Pfeiffer, Marcel
name: Garmirian, Félix
name: Gorji, M. Hossein
Publisher: name: arXiv
Year: 2022
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: Despite the development of an extensive toolbox of multi-scale rarefied flow simulators, such simulations remain challenging due to the significant disparity of collisional and macroscopic spatio-temporal scales. Our study offers a novel and consistent numerical scheme for a coupled treatment of particles advection and collision governed by the BGK evolution, honouring positivity of the velocity distribution. Our method shares its framework, in spirit, with the unified gas kinetic class of multi-scale schemes. Yet it provides attractive features for particle-based stochastic simulations, readily implementable to existing direct simulation Monte-Carlo codes. We demonstrate accuracy and performance of the devised scheme for prototypic gas flows, over a wide-range of rarefaction parameters. Due to the resulting robustness and flexibility of the devised exponential BGK integrator, the scheme paves the way towards more affordable simulations of large- and multi-scale rarefied gas phenomena.
Dance for Life
Creators: name: Richter, Cora B.
name: Coley, Kimone C.
Publisher: name: Columbia Social Work Review
Year: 2019

description: A substantial majority of women—some 69–84% in the United States— experience body image dissatisfaction (Runfola et al., 2013), often beginning from a young age. Body image dissatisfaction is an empirically supported predictor of maladaptive eating behaviors such as dieting, bulimic behaviors, and weight gain (Bucchianeri, Arikan, Hannan, Eisenberg, & Neumark- Sztainer, 2013). It is also a risk factor for depression (Paxton, Neumark- Sztainer, Hannan, & Eisenberg, 2006) and a mediator of the relationship between body mass index and self-esteem (Bucchianeri et al., 2013). Accordingly, there is an urgent need for preventative interventions and programs where girls can develop the resilience to maintain healthy body image.
description: Columbia Social Work Review, Vol 17 No 1 (2019)
Semi-Infinite Quasi-Toeplitz Matrices with Applications to QBD Stochastic Processes
Creators: name: Bini, Dario A.
name: Massei, Stefano
name: Meini, Beatrice
Publisher: name: arXiv
Year: 2016
Subjects: subject: Numerical Analysis (math.NA)
subject: Rings and Algebras (math.RA)
subject: FOS: Mathematics

description: Denote by $\mathcal{W}_1$ the set of complex valued functions of the form $a(z)=\sum_{i=-\infty}^{+\infty}a_iz^i$ which are continuous on the unit circle, and such that $\sum_{i=-\infty}^{+\infty}|ia_i|
How Long Must They Be Alone?
Creators: name: Olsen, Ellen
Publisher: name: Columbia Social Work Review
Year: 2008

description: Unaccompanied minors often face severe trauma during their preflight lives as well as during the course of their migration. These traumatic experiences can have negative psychosocial impacts on the minors, and hostile reception policies in destination countries exacerbate their hardships. Though social work services are traditionally undervalued in the areas of asylum and resettlement, the discipline has much to offer in terms of practice, programming, and policy. The complexity of circumstances in which children become unaccompanied, as well as the diverse needs of the children themselves, mean that no single country, discipline, or agency can solve the problem individually. Complementary skills should be coordinated and international mandates must be established in a concerted effort to respond to this issue. There is a need for more research to determine the psychosocial issues of unaccompanied minors and identify best practices for social workers in destination countries to provide direct services and advocacy for this population.
description: Columbia Social Work Review, Vol 6 No 1 (2008)
Vortex Shedding from an Object Moving in Superfluid $^4$He at mK Temperatures and in a Bose-Einstein Condensate
Creators: name: Schoepe, Wilfried
Publisher: name: arXiv
Year: 2016
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: Vortex shedding from a microsphere oscillating in superfluid $^4$He at mK temperatures is compared with that from a laser beam moving in a Bose-Einstein condensate (BEC) as observed by other authors. In particular, in either case a linear dependence of the shedding frequency $f_v$ on $Δv = v - v_c$ is observed, where $v$ is the velocity amplitude of the sphere or the constant velocity of the laser beam above a critical velocity $v_c$ for the onset of turbulent flow: $f_v = a \,Δv$, where the coefficient $a$ is proportional to the oscillation frequency $ ω$above some characteristic frequency $ω_k$ and assumes a finite value for steady motion $ω\rightarrow 0$.
description: 6 pages, 3 figures
Three-dimensional geological and geophysical modelling of the Cannington Deposit, NW Queensland, Australia
Creators: name: Huynh, Thong H. .
Publisher: name: Monash University
Year: 2022

description: This thesis was scanned from the print manuscript for digital preservation and is copyright the author.
 Researchers can access this thesis by asking their local university, institution or public library to
 make a request on their behalf. Monash staff and postgraduate students can use the link in the References field.
Linear mode analysis from spin transport equation
Creators: name: Hu, Jin
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We provide a linear analysis on normal modes of the spin Boltzmann equation proposed in \cite{Weickgenannt:2021cuo}, where the non-diagonal or polarized part of the transition rate is neglected to ensure the Hermitian property of linearized collision operator. As an instrumental element of spin kinetic theory, the conservation of total angular momentum is explicitly considered, thus our analysis is relevant to the recent investigation on the issue of local spin polarization. By treating the linearized collision operator as an evolution operator, solving the normal modes turns out a degenerate perturbation problem in quantum mechanics. The dispersion relations of spinless modes are in accordance with well-known calculations, while the frequencies of spin modes are also determined up to second-order in wave vector and the second order expressions are only formal solutions to be further determined. Moreover, the relaxation of spin density is related to our linear mode analysis, which shall play a big role in investigating the issues of the local spin polarization in the relativistic heavy-ion collisions.
Knabenwohlbeschneidung? Eine explorative Forschung über mögliche Auswirkungen der religiöskulturellen Praktik der Beschneidung auf die Betroffenen: Relevanz und Möglichkeit zur Umsetzung der Ergebnisse in der Sozialen Arbeit.
Creators: name: Bodur, Kerem
name: Kipfer, Michèle
Publisher: name: Zenodo
Year: 2023

description: Die Knabenbeschneidung ist eine weitverbreitete Praktik. Weltweit ist schätzungsweise ein Drittel der männlichen Bevölkerung beschnitten. Der Eingriff wird medizinisch, ästhetisch, religiös und kulturell begründet. Die vorliegende Arbeit geht der religiös-motivierten Beschneidung nach und konzentriert sich dabei auf die Auswirkungen auf biologischer, emotionaler, sozialer und rechtlicher Ebene der Betroffenen. Ziel der Forschung ist, einen Überblick über die verschiedenen Dimensionen dieser Praktik zu gewinnen und deren Folgen für Betroffene zu analysieren. Hierfür werden rechtliche, soziologische und ethische Perspektiven aufgegriffen und Kontroversen um die medizinische Notwendigkeit beleuchtet. Internationale Menschenrechtsstandards sowie nationale Gesetze in Zusammenhang mit der Praktik werden hinzugezogen. Dabei wird sich zeigen, dass die Beschneidung in einem Spannungsfeld zwischen dem Recht auf Selbstbestimmung der Knaben sowie der Religionsfreiheit und Erziehungshoheit der Eltern steht. Daneben werden andere Faktoren wie kulturelle oder soziokulturelle Einflüsse beleuchtet, die zur Aufrechterhaltung der Praktik beitragen. Welche Rolle dabei die Religion und Tradition, geltende Männerbilder oder die Gemeinschaft spielen, wird geklärt. Die Ergebnisse werden zeigen, dass das Alter zum Zeitpunkt der Beschneidung und deren Kontext enormen Einfluss auf mögliche Folgen für die Betroffenen haben und diese bis ins Erwachsenenalter Probleme bereiten können. Dadurch kann das Wohl der Knaben gefährdet sein. Durch die multidimensionale Analyse der Auswirkungen trägt diese Forschungsarbeit dazu bei, ein vertieftes Verständnis der Praktik der Beschneidung zu gewinnen. Die neuen Erkenntnisse können einerseits die Debatte mit Wissen zur Rechtmässigkeit, ethischen Implikationen und gesundheitlichen Aspekten der Knabenbeschneidung anreichern und künftige Entscheidungsfindungen auf politischer und gesellschaftlicher Ebene unterstützen. Andererseits tragen sie dazu bei, das Wohlergehen und die Rechte der betroffenen Personen zu stärken.
description: + Code Diss LU: hslusa basa be + Fussnote: Bachelor-Arbeit, Hochschule Luzern – Soziale Arbeit, Studienrichtung Sozialarbeit, 2023 + NL-Code: NLLUHSA202309
Qualitative and quantitative characteristics of xylazine-associated deaths detected using a post-mortem toxicology testing program
Creators: name: Vohra, Varun
name: Stroh-Steiner, Gabrielle K.
name: Jones, Prentiss
Publisher: name: Taylor & Francis
Year: 2023
Subjects: subject: Biochemistry
subject: Medicine
subject: Neuroscience
subject: Pharmacology
subject: Biotechnology
subject: Sociology
subject: FOS: Sociology
subject: Biological Sciences not elsewhere classified
subject: Cancer
subject: Mental Health
subject: Virology
subject: Computational Biology

description: The United States drug overdose crisis continues to evolve. Xylazine has been increasingly identified as an adulterant in illicit opioid supplies. The incorporation of novel adulterants, like xylazine, into the illicit drug supply adds complexity to post-mortem toxicology testing, public health messaging, substance use mitigation, and the treatment of people who use drugs. We assessed trends, decedent characteristics, drug co-detection, and blood concentrations of xylazine-positive post-mortem cases in Michigan. We utilized a toxicology testing program capable of detecting several opioids and non-opioids in post-mortem blood samples within 72 hours. A total of 279 deaths were xylazine-positive between October 2019 and June 2023, with 100 percent positive for fentanyl. Only 30 percent of xylazine-involved samples were positive for naloxone, while 21.2 percent of xylazine-negative and opioid-positive samples were positive for naloxone. The percentage of xylazine-positive deaths increased from 3.2 percent in 2021 to 4.7 percent in January–June 2023. A median of five total drug groups were present among xylazine-positive deaths. Post-mortem xylazine concentrations for 55 decedent blood samples ranged from 5.2 to 200 µg/L. Our study demonstrated increases in xylazine detection among post-mortem cases. Our findings are consistent with national trends of increasing xylazine presence among drug-involved deaths. Our range of detected post-mortem xylazine blood concentrations was consistent with what has been reported in previous literature. Fentanyl was detected in 100 percent of xylazine-positive overdose deaths. Naloxone detection was relatively low, highlighting the continued importance of increasing naloxone access and distribution. Deaths associated with xylazine often involved multiple other drugs. Limited human clinical xylazine research precludes accurate interpretation and attribution of causality from these data. Overdose-related deaths with xylazine detection are increasing in Michigan and across the United States. Further clinical and toxicological research can help contextualize the clinical significance of xylazine in opioid overdose, clarify epidemiologic and clinical research, and inform appropriate public health messaging.
Resonant phase lags of a Duffing oscillator
Creators: name: Volvert, Martin
name: Kerschen, Gaetan
Publisher: name: arXiv
Year: 2022
Subjects: subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics

description: This paper revisits the resonant behavior of a harmonically-forced Duffing oscillator with a specific attention to phase resonance and to its relation with amplitude resonance. To this end, the different families of resonances, namely primary (1:1), superharmonic (k:1), subharmonic (1:ν) and ultra-subharmonic (k:ν) resonances are carefully studied using first and higher-order averaging. When the phase lag is calculated between the k-th harmonic of the displacement and the harmonic forcing, this study evidences that phase resonance occurs when the phase lag is equal to either π/2 (phase quadrature) or 3π/4ν.
description: 16 Pages, 8 figures
On the greatest common divisor of the value of two polynomials
Creators: name: Frenkel, Péter E.
name: Pelikán, József
Publisher: name: arXiv
Year: 2016
Subjects: subject: Number Theory (math.NT)
subject: Commutative Algebra (math.AC)
subject: FOS: Mathematics
subject: 11N32, 11C08, 11C20, 11A05, 13P15, 12E05, 15A03, 15A21

description: We show that if two monic polynomials with integer coefficients have square-free resultant, then all positive divisors of the resultant arise as the greatest common divisor of the values of the two polynomials at a suitable integer.
description: 6 pages
An evaluation of the Boyer Paper Mill ecological risk assessment process
Creators: name: San Felipe, Zenaida T.
Publisher: name: Monash University
Year: 2022

description: This thesis was scanned from the print manuscript for digital preservation and is copyright the author.
 Researchers can access this thesis by asking their local university, institution or public library to
 make a request on their behalf. Monash staff and postgraduate students can use the link in the References field.
A GPU-Based Genetic Algorithm for the P-Median Problem
Creators: name: AlBdaiwi, Bader F.
name: AboElFotoh, Hosam M. F.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: FOS: Computer and information sciences

description: The p-median problem is a well-known NP-hard problem. Many heuristics have been proposed in the literature for this problem. In this paper, we exploit a GPGPU parallel computing platform to present a new genetic algorithm implemented in Cuda and based on a Pseudo Boolean formulation of the p-median problem. We have tested the effectiveness of our algorithm using a Tesla K40 (2880 Cuda cores) on 290 different benchmark instances obtained from OR-Library, discrete location problems benchmark library, and benchmarks introduced in recent publications. The algorithm succeeded in finding optimal solutions for all instances except for two OR-library instances, namely pmed30 and pmed40, where better than 99.9\% approximations were obtained.
Begleitung von Eltern bei einem Kindsverlust: Zuständigkeitsbereiche und Handlungspotenziale der Sozialen Arbeit
Creators: name: Brand, Janine
name: Pfyffer, Nadine
Publisher: name: Zenodo
Year: 2023

description: Die vorliegende Bachelorarbeit mit dem Titel «Begleitung von Eltern bei einem Kindsverlust». Zuständigkeitsbereiche und Handlungspotenziale der Sozialen Arbeit» ist eine Literaturarbeit und gibt einen detaillierten Einblick in das tabuisierte Thema des Kindsverlusts. Wenn Eltern ein Kindsverlust erleben, sind sie mit diversen Herausforderungen konfrontiert. Durch fehlende Anerkennung des Elternseins und der entrechteten Trauer wird die Bewältigung umso mehr erschwert. Der Schlussbericht der Studie von Meier Magistretti et al. (2019) zeigt diverse Lücken in der Begleitung von betroffenen Eltern auf. Um diese Lücken zu schliessen, leiten Janine Brand und Nadine Pfyffer die Zuständigkeit der Sozialen Arbeit her. Durch das dritte Mandat der Profession kann sich die Soziale Arbeit selbst den Auftrag erteilen, im Thema Kindsverlust tätig zu werden. Die klinische Sozialarbeit als Fachsozialarbeit mit ihrer psychosozialen Perspektive und dem Fokus auf die soziale Dimension im Gesundheitswesen kann durch spezifische Interventionen einen optimalen Beitrag zur Unterstützung von betroffenen Eltern leisten. Es besteht grosses Handlungspotenzial die ambulante Begleitung durch die klinische Sozialarbeit auszubauen und in bestehende Organisationen zu integrieren. Das Potenzial liegt konkret in der Förderung der interprofessionellen Kooperation, der Sicherstellung eines lückenlosen Informations-flusses und der öffentlichen Sensibilisierungsarbeit. Dadurch besteht die Möglichkeit, eine ganzheitliche Begleitung der Eltern zu gewährleisten. Sozialarbeitende müssen spezifische Kompetenzen erwerben, um wichtige Aufgaben als Berater:in, Netzwerker:in und Trauerbegleiterin:in zu übernehmen.
description: + Code Diss LU: hslusa basa be + Fussnote: Bachelor-Arbeit, Hochschule Luzern – Soziale Arbeit, Studienrichtung Sozialarbeit, 2023 + NL-Code: NLLUHSA202309
Winter (or delta-shell) Model at Small and Intermediate Volumes
Creators: name: Aglietti, U. G.
name: Cubeddu, A.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We consider Winter (or delta-shell) model at finite volume, describing a small resonating cavity weakly coupled to a large one, for small and intermediate volumes (lengths). By defining N as the ratio of the length of the large cavity over the small one, we study the symmetric case N=1, in which the two cavities actually have the same length, as well as the cases N=2,3,4. By increasing N in the above range, the transition from a simple quantum oscillating system to a system having a resonance spectrum is investigated. We find that each resonant state is represented, at finite volume, by a cluster of states, each one resonating in a specific coupling region, centered around a state resonating at very small couplings. We derive high-energy expansions for the particle momenta in the above N cases, which (approximately) resum their perturbative series to all orders in the coupling among the cavities. These new expansions converge rather quickly with the order, provide, surprisingly, a uniform approximation in the coupling and also work, again surprisingly, at low energies. We construct a first resummation scheme having a clear physical picture, which is based on a function-series expansion, as well as a second scheme based on a recursion equation. The two schemes coincide at leading order, while they differ from next-to-leading order on. In particular, the recursive scheme realizes an approximate resummation of the function-series expansion generated within the first scheme.
description: LaTeX file, 97 pages, 10 figures
The validation of the Millijet instrument use in ethanol analysis for wines
Creators: name: Wang, Jibo.
Publisher: name: Monash University
Year: 2022

description: This thesis was scanned from the print manuscript for digital preservation and is copyright the author.
 Researchers can access this thesis by asking their local university, institution or public library to
 make a request on their behalf. Monash staff and postgraduate students can use the link in the References field.
X-ray Background at High Redshifts from Pop III Remnants: Results from Pop III star formation rates in the Renaissance Simulations
Creators: name: Xu, Hao
name: Ahn, Kyungjin
name: Norman, Michael L
name: Wise, John H
name: O'Shea, Brian W
Publisher: name: arXiv
Year: 2016
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Due to their long mean free paths, X-rays are expected to have many significant impacts globally on the properties of the intergalactic medium (IGM) by their heating and ionizing processes on large scales. At high redshifts, X-rays from Population (Pop) III binaries might have important effects on cosmic reionization and the Lyman alpha forest. As a continuation of our previous work on Pop III binary X-rays (Xu et al. 2014), we use the Pop III distribution and evolution from the Renaissance Simulations, a suite of self-consistent cosmological radiation hydrodynamics simulations of the formation of the first galaxies, to calculate the X-ray luminosity density and background over the redshift range 20 > z > 7.6. As we find that Pop III star formation continues at a low, nearly constant rate to the end of reionization, X-rays are being continuously produced at significant rates compared to other possible X-ray sources, such as AGNs and normal X-ray binaries during the same period of time. We estimate that Pop III binaries produce approximately 6 eV of energy in the X-rays per hydrogen atom. We calculate the X-ray background for different monochromatic photon energies. KeV X-rays redshift and accumulate to produce a strong X-ray background spectrum extending to roughly 500 eV. The X-ray background is strong enough to heat the IGM to ~ 1000 K and to ionize a few percent of the neutral hydrogen. These effects are important for an understanding of the neutral hydrogen hyperfine transition 21-cm line signatures, the Ly alpha forest, and optical depth of the CMB to Thomson scattering.
description: 6 pages, 5 figures, Astrophysical Journal Letters accepted
Modification of rosin by reaction with maleic anhydride and esterification of modified rosin
Creators: name: Li, Xun.
Publisher: name: Monash University
Year: 2022

description: This thesis was scanned from the print manuscript for digital preservation and is copyright the author.
 Researchers can access this thesis by asking their local university, institution or public library to
 make a request on their behalf. Monash staff and postgraduate students can use the link in the References field.
Mobile impurity in a one-dimensional gas at finite temperatures
Creators: name: Gamayun, Oleksandr
name: Panfil, Miłosz
name: Sant'Ana, Felipe Taha
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Mathematical Physics (math-ph)
subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Physical sciences

description: We consider the McGuire model of a one-dimensional gas of free fermions interacting with a single impurity. We compute the static one-body function and momentum distribution of the impurity at finite temperatures. The results involve averages over Fredholm determinants that we further analyse using the effective form factors approach. With this approach, we derive the large-distance behaviour of the one-body function, which takes the form of an averaged exponential decay. This method allows us to study an experimentally important regime of small momenta of the impurity's momentum distribution. We also consider the one-body function at short distances and compute finite temperature Tan's contact.
Gold mineralisation in Walhalla, Victoria : geochemistry of turbidites and quartz veins and the degree of fluid-rock interaction during vein formation
Creators: name: Colebatch, Jutta Camilla.
Publisher: name: Monash University
Year: 2022

description: This thesis was scanned from the print manuscript for digital preservation and is copyright the author.
 Researchers can access this thesis by asking their local university, institution or public library to
 make a request on their behalf. Monash staff and postgraduate students can use the link in the References field.
The 3XMM/SDSS Stripe 82 Galaxy Cluster Survey: Cluster catalogue and discovery of two merging cluster candidates
Creators: name: Takey, Ali
name: Durret, Florence
name: Mahmoud, Eman A.
name: Ali, Gamal B.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present a galaxy cluster survey based on XMM-Newton observations that are located in Stripe 82 of the Sloan Digital Sky Survey (SDSS). The survey covers an area of 11.25 deg$^2$. The X-ray cluster candidates were selected as serendipitously extended detected sources from the third XMM-Newton serendipitous source catalogue (3XMM-DR5). A cross-correlation of the candidate list that comprises 94 objects with recently published X-ray and optically selected cluster catalogues provided optical confirmations and redshift estimates for about half of the candidate sample. We present a catalogue of X-ray cluster candidates previously known in X-ray and/or optical bands from the matched catalogues or NED. The catalogue consists of 54 systems with redshift measurements in the range of 0.05-1.19 with a median of 0.36. Of these, 45 clusters have spectroscopic confirmations as stated in the matched catalogues. We spectroscopically confirmed another 6 clusters from the available spectroscopic redshifts in the SDSS-DR12. The cluster catalogue includes 17 newly X-ray discovered clusters, while the remainder were detected in previous XMM-Newton and/or ROSAT cluster surveys. Based on the available redshifts and fluxes given in the 3XMM-DR5 catalogue, we estimated the X-ray luminosities and masses for the cluster sample. We also present the list of the remaining X-ray cluster candidates (40 objects) that have no redshift information yet in the literature. Of these candidates, 25 sources are considered as distant cluster candidates beyond a redshift of 0.6. We also searched for galaxy cluster mergers in our cluster sample and found two strong candidates for newly discovered cluster mergers at redshifts of 0.11 and 0.26. The X-ray and optical properties of these systems are presented.
description: 17 pages, 12 figures, accepted for publication in A&A, revised version after language editing
Search for invisible Higgs-boson decays in events with vector-boson fusion signatures using 139 $\text{fb}^{-1}$ of proton-proton data recorded by the ATLAS experiment
Creators: name: ATLAS Collaboration
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: A direct search for Higgs bosons produced via vector-boson fusion and subsequently decaying into invisible particles is reported. The analysis uses 139 $\text{fb}^{-1}$ of $pp$ collision data at a centre-of-mass energy of $\sqrt{s}$=13 $\text{TeV}$ recorded by the ATLAS detector at the LHC. The observed numbers of events are found to be in agreement with the background expectation from Standard Model processes. For a scalar Higgs boson with a mass of 125 $\text{GeV}$ and a Standard Model production cross section, an observed upper limit of $0.145$ is placed on the branching fraction of its decay into invisible particles at 95% confidence level, with an expected limit of $0.103$. These results are interpreted in the context of models where the Higgs boson acts as a portal to dark matter, and limits are set on the scattering cross section of weakly interacting massive particles and nucleons. Invisible decays of additional scalar bosons with masses from 50 $\text{GeV}$ to 2 $\text{TeV}$ are also studied, and the derived upper limits on the cross section times branching fraction decrease with increasing mass from 1.0 $\text{pb}$ for a scalar boson mass of 50 $\text{GeV}$ to 0.1 $\text{pb}$ at a mass of 2 $\text{TeV}$.
description: 63 pages in total, author list starting page 48, 14 figures, 9 tables, published in JHEP 08 (2022) 104. All figures including auxiliary figures are available at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/EXOT-2020-11
Soziale Landwirtschaft: Eine Forschungsarbeit zur Begleitung und Betreuung erwachsener Menschen in der Landwirtschaft
Creators: name: Brunner, Laura
Publisher: name: Zenodo
Year: 2023

description: Soziale Landwirtschaft bezeichnet soziale Dienstleistungen, in denen landwirtschaftliche Ressourcen zur Förderung der Entwicklung von Menschen mit Betreuungsbedarf und zur Steigerung deren Wohlbefinden genutzt werden. Die vorliegende Arbeit befasst sich mit Betreuungsangeboten für Erwachsene in landwirtschaftlichen Familienbetrieben im Kanton Bern, welche im Rahmen von Netzwerkorganisationen [NWO] von der Sozialen Arbeit in Zusammenarbeit mit der Landwirtschaft erbracht werden. Die Arbeit befasst sich mit der Frage, wie Angebote im Rahmen von NWO funktionieren und ob sich diese unter der Perspektive professioneller Sozialer Arbeit in der Praxis bewähren. Mittels qualitativer Interviews mit Fachpersonen zweier NWO und vier landwirtschaftlicher Gastfamilien werden die Funktionsweise der Angebote und die Begleitung der Klientel durch die Gastfamilien untersucht sowie Spannungsfelder zwischen den Aussagen der Fachpersonen und der Gastfamilien herausgearbeitet. In der Diskussion werden die Ergebnisse den berufsethischen Grundsätzen der Sozialen Arbeit aus deren Berufskodex (AvenirSocial, 2010) gegenübergestellt und es wird gezeigt, dass die Begleitung der Klientel durch die Gastfamilien weitgehend professionellen Grundsätzen entspricht. Dennoch kann aus der Perspektive der professionellen Sozialen Arbeit Handlungsbedarf für den Bereich der Sozialen Landwirtschaft festgestellt werden. Die vorliegende Arbeit schliesst daher mit Handlungsempfehlungen für die Soziale Arbeit als Disziplin und Profession.
description: + Code Diss LU: hslusa basp be + Fussnote: Bachelor-Arbeit, Hochschule Luzern – Soziale Arbeit, Studienrichtung Sozialpädagogik, 2023 + NL-Code: NLLUHSA202309
Nonlinear currents in a ring-shaped waveguide with balanced gain and dissipation
Creators: name: Zezyulin, Dmitry A.
name: Konotop, Vladimir V.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Pattern Formation and Solitons (nlin.PS)
subject: FOS: Physical sciences

description: We describe linear and nonlinear modes in a ring-shaped waveguide with localized gain and dissipation modeled by two Dirac $δ$ functions located symmetrically. The strengths of the gain and dissipation are equal, i.e., the system obeys the parity-time symmetry. This configuration describes atomic Bose-Einstein condensates with local loading and local elimination of atoms, polaritonic condensates, or optical ring resonators with local pump and absorption. We discuss the linear spectrum of such a system and show if the location of the $δ$ functions is slightly asymmetric, then the system can be driven through a series of exceptional points by the change of the gain-and-loss coefficient. In the nonlinear case, the system admits solutions with spatially constant and periodic densities which are presented in the exact analytical form. These solutions are supported by the current directed from the gain potential towards the absorbing potential. The system also admits currentless solutions. Stability and bifurcations of nonlinear solutions are also described.
description: 11 pages, 9 figures; accepted to Phys. Rev. A
Simulations of F- to A-type main-sequence and sub-giant stars
Creators: name: Fabbian, Damian
name: Caldiroli, Andrea
name: Kupka, Friedrich
name: Montgomery, Mike H.
name: Muthsam, Herbert J.
Publisher: name: Zenodo
Year: 2023

description: We carry out two-dimensional (2-D) and three-dimensional(3-D) radiation-hydrodynamics (RHD) simulations of surface convection in stellar atmospheres warmer than the Sun (namely, with effective temperatures spanning 6600−9000 K) using the ANTARES numerical code. The resulting datasets will be
 used: 1) as benchmark to improve multi-dimensional atmospheric models for this type of stellar objects; 2) as the basis for computing synthetic spectra and other observable signatures (e. g. for asteroseismology applications) of the physical properties of relevant target stars; and 3) to investigate the stability of stellar irradiance on the time scales spanned by our simulations. We will continue extending the simulations to cover a time duration of up to several stellar days to study p-mode excitation and damping processes. Here, we present the planned grid of simulations and first results.
Controls on groundwater chemistry and hydrogeology at the Lyndhurst Landfill, Victoria
Creators: name: Gedge, Lee.
Publisher: name: Monash University
Year: 2022

description: This thesis was scanned from the print manuscript for digital preservation and is copyright the author.
 Researchers can access this thesis by asking their local university, institution or public library to
 make a request on their behalf. Monash staff and postgraduate students can use the link in the References field.
Complementarity of Resonant Scalar, Vector-Like Quark and Superpartner Searches in Elucidating New Phenomena
Creators: name: Biekötter, Anke
name: Hewett, JoAnne L.
name: Kim, Jong Soo
name: Krämer, Michael
name: Rizzo, Thomas G.
name: Rolbiecki, Krzysztof
name: Tattersall, Jamie
name: Weber, Torsten
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The elucidation of the nature of new phenomena requires a multi-pronged approach to understand the essential physics that underlies it. As an example, we study the simplified model containing a new scalar singlet accompanied by vector-like quarks, as motivated by the recent diphoton excess at the LHC. To be specific, we investigate three models with $SU(2)_L$-doublet, vector-like quarks with Yukawa couplings to a new scalar singlet and which also couple off-diagonally to corresponding Standard Model fermions of the first or third generation through the usual Higgs boson. We demonstrate that three classes of searches can play important and complementary roles in constraining this model. In particular, we find that missing energy searches designed for superparticle production, supply superior sensitivity for vector-like quarks than the dedicated new quark searches themselves.
description: References added; small bug found in model and analysis implementation, numerical results slightly modified, conclusions unchanged
Electrically driven robust tuning of lattice thermal conductivity
Creators: name: Zhou, E
name: Wei, Donghai
name: Wu, Jing
name: Qin, Guangzhao
name: Hu, Ming
Publisher: name: arXiv
Year: 2022
Subjects: subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: Two-dimensional (2D) materials represented by graphene stand out in future electrical industry and have been widely studied. As a commonly existing factor in electronic devices, the electric field has been extensively utilized to modulate the performance. However, how the electric field regulates thermal transport is rarely studied. Herein, we investigate the modulation of thermal transport properties by applying the external electric field ranging from 0 to 0.4 VA-1, with bilayer graphene, monolayer silicene, and germanene as study cases. The monotonic decreasing trend of thermal conductivity of all the three materials is revealed. The significant effect on the scattering rate is found to be responsible for the decreased thermal conductivity by electric field. Further evidences show that the reconstruction of internal electric field and the generation of induced charges lead to the increased scattering rate from strong phonon anharmonicity. Thus, the ultra-low thermal conductivity emerges with external electric field applied. Applying external electric field to regulate thermal conductivity enlightens the constructive idea for high-efficient thermal management.
Photon frequency diffusion process
Creators: name: Oliveira, Guilherme Eduardo Freire
name: Maes, Christian
name: Meerts, Kasper
Publisher: name: arXiv
Year: 2022
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We introduce a stochastic multi-photon dynamics on reciprocal space. Assuming isotropy, we derive the diffusion limit for a tagged photon to be a nonlinear Markov process on frequency. The nonlinearity stems from the stimulated emission. In the case of Compton scattering with thermal electrons, the limiting process describes the dynamical fluctuations around the Kompaneets equation. More generally, we construct a photon frequency diffusion process which enables to include nonequilibrium effects. Modifications of the Planck Law may thus be explored, where we focus on the low-frequency regime.
description: 30 pages, 8 figures
Hydrogeochemical and geophysical investigations into the environmental impact of the overburden pile at the Loy Yang Coal Mine, Australia
Creators: name: Elders, Julie A.
Publisher: name: Monash University
Year: 2022

description: This thesis was scanned from the print manuscript for digital preservation and is copyright the author.
 Researchers can access this thesis by asking their local university, institution or public library to
 make a request on their behalf. Monash staff and postgraduate students can use the link in the References field.
Constant-$r$ geodesics in the Painleve-Gullstrand form of Lense-Thirring spacetime
Creators: name: Baines, Joshua
name: Berry, Thomas
name: Simpson, Alex
name: Visser, Matt
Publisher: name: arXiv
Year: 2022
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Herein we explore the non-equatorial constant-$r$ ("quasi-circular") geodesics (both timelike and null) in the Painleve-Gullstrand variant of the Lense-Thirring spacetime recently introduced by the current authors. Even though the spacetime is not spherically symmetric, shells of constant-$r$ geodesics still exist. Whereas the radial motion is (by construction) utterly trivial, determining the allowed locations of these constant-$r$ geodesics is decidedly non-trivial, and the stability analysis is equally tricky. Regarding the angular motion, these constant-$r$ orbits will be seen to exhibit both precession and nutation -- typically with incommensurate frequencies. Thus this constant-$r$ geodesic motion, though integrable in the precise technical sense, is generically surface-filling, with the orbits completely covering a symmetric equatorial band which is a segment of a spherical surface, (a so-called "spherical zone"), and whose latitudinal extent is governed by delicate interplay between the orbital angular momentum and the Carter constant. The situation is qualitatively similar to that for the (exact) Kerr spacetime -- but we now see that any physical model having the same slow-rotation weak-field limit as general relativity will still possess non-equatorial constant-$r$ geodesics.
description: Note change in article title! V1: 24 pages, 0 figures. V2: added 1 reference; no physics changes; V3: now 26 pages; 4 figures; 2 more references; terminology and presentation improved; some bug fixes, but physics conclusions unchanged. This version accepted for publication in General Relativity and Gravitation
High Performance Inverted Organic Photovoltaics Without Hole Selective Contact
Creators: name: Savva, Achilleas
name: Burgues-Ceballos, Ignasi
name: Papazoglou, Giannis
name: Choulis, Stelios A.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: A detailed investigation of the functionality of inverted organic photovoltaics (OPVs) using bare Ag contacts as top electrode is presented. The inverted OPVs without hole transporting layer (HTL) exhibit a significant gain in hole carrier selectivity and power conversion efficiency (PCE) after exposure in ambient conditions. Inverted OPVs comprised of ITO/ZnO/poly(3-hexylthiophene-2,5-diyl):phenyl-C61-butyric acid methyl ester (P3HT:PCBM)/Ag demonstrate over 3.5% power conversion efficiency only if the devices are exposed in air for over 4 days. As concluded through a series of measurements, the oxygen presence is essential to obtain fully operational solar cell devices without HTL. Moreover, accelerated stability tests under damp heat conditions (RH=85% and T=65oC) performed to non-encapsulated OPVs demonstrate that HTL-free inverted OPVs exhibit comparable stability to the reference inverted OPVs. Importantly, it is shown that bare Ag top electrodes can be efficiently used in inverted OPVs using various high performance polymer:fullerene bulk heterojunction material systems demonstrating 6.5% power conversion efficiencies.
BREWSTER-LIKE REFLECTIONLESS TRANSMISSION OF EVANESCENT WAVES THROUGH A PLANE TWO-MEDIA INTERFACE
Creators: name: Ignatov, A.I.
name: Merzlikin, A.M.
Publisher: name: Современная электродинамика
Year: 2023
Subjects: BREWSTER EFFECT
EVANESCENT WAVE
NEAR FIELD
MAGNETODIELECTRIC
SURFACE WAVE

description: We propose a Brewster-like reflectionless transmission effect of evanescent waves: no evanescent reflected waves are observed at evanescent wave incidence on a plane interface of two media. Similar to the well-known Brewster effect for propagating waves, the proposed Brewster-like effect for evanescent waves occurs when surface impedances of waves in the neighboring media are equal. Contrary to the known Brewster effect for complex incidence angles related to the existence of some surface wave (when surface impedances are equal for evanescent waves to both sides of the two-media interface decaying in the directions away from the interface), the proposed Brewster-like reflectionless transmission corresponds to the surface impedances equality for evanescent waves decaying in the same direction. It was shown that the proposed Brewster-like effect for evanescent waves can occur for both (𝑝- and 𝑠-) polarizations and only for magnetic media (𝜇 not equal 1 for at least one of the two neighboring media). Based on the proposed Brewster-like reflectionless transmission of evanescent waves, we suggest a method of a totally-reflected-wave’s phase patterning with a pattern vanishing exactly at Brewster’s angle.
Design for implementation of discrete-time quantum walk with circulant matrix on graph by optical polarizing elements
Creators: name: Mizutani, Yusuke
name: Segawa, Etsuo
name: Higuchi, Yusuke
name: Matsuoka, Leo
name: Horikiri, Tomoyuki
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: In this paper, we introduce a quantum walk whose local scattering at each vertex is denoted by a unitary circulant matrix; namely the circulant quantum walk. We also introduce another quantum walk induced by the circulant quantum walk; namely the optical quantum walk, whose underlying graph is a $2$-regular directed graph and obtained by blowing up the original graph in some way. We propose a design of an optical circuit which implements the stationary state of the optical quantum walk. We show that if the induced optical quantum walk does not have $+1$ eigenvalue, then the stationary state of the optical quantum walk gives that of the original circulant quantum walk. From this result, we give a useful condition for the setting of the circulant quantum walks which can be implemented by this optical circuit.