cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
A Multimodal Retinal Imaging System for the Delivery of Treatment Laser Radiation
Creators: Stolte, Wesley
Publisher: name: University of Alberta Library
Year: 2023

This thesis focuses on the development of a prototype ophthalmic device capable of

performing both diagnostic retinal imaging and the delivery of therapeutic lasers for the

treatment of ocular diseases in the posterior eye. Particularly for the treatment of Diabetic

retinopathy (DR), and age-related macular degeneration (AMD). DR is an eye disease

occurring in patients with diabetes, characterized by the leaking of blood onto the retina, which

often requires laser photocoagulation treatment to slow or halt patient vision loss. AMD is a

degenerative retinal condition which causes severe vision loss, currently there are limited

treatment options for its early and intermediate stages which are characterized by the growth

of drusen under the retina.

The first aim of the project was to develop an imaging system that could capture both

en-face and cross-sectional images of the retina. This was done by designing and building a

scanning laser ophthalmoscope (SLO) and integrating it with an optical coherence tomography

(OCT) device. The imaging system was evaluated using artificial, porcine, and human eyes.

Two configurations of the imaging system are described, going from a preliminary prototype

device to one suitable for use in clinical trials. The second aim of the project was to use the

imaging system to deliver a 532 nm laser light to the retina for the treatment of DR. This will

eventually allow for automated treatments which are expected to outperform traditional

treatments. A laser used for photocoagulation is fiber coupled to the imaging system and a lens

system is designed such that the resulting flat-top spot on the retina has a continuously variable

size. The delivery of this laser radiation was tested indirectly with a telecentric lens. The final

aim of the project was to deliver femtosecond laser pulse trains to an artificial retina, paving

the way for utilizing nonlinear absorption to perform ablation of drusen in early AMD. Here

the green laser source is removed and replaced with a Ti:Sapphire femtosecond laser source

centered at 780 nm. The femtosecond laser pulses are coupled into the device with a hollow

core photonic crystal fiber and delivered to the retina using close to the maximum numerical

aperture of the eye. The femtosecond pulse train was successfully delivered to the artificial

retina; however, due to limitations of the laser at the time of the experiment, sufficient

irradiance for nonlinear photoionization could not be delivered to the sample. Instead, the

artificial retina is evaluated without the delivery device. These measurements are then used to

determine the proper parameters for a laser to be used with the delivery system.
New Electron Beam-Dump Experiments to Search for MeV to few-GeV Dark Matter
Creators: name: Izaguirre, Eder
name: Krnjaic, Gordan
name: Schuster, Philip
name: Toro, Natalia
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: In a broad class of consistent models, MeV to few-GeV dark matter interacts with ordinary matter through weakly coupled GeV-scale mediators. We show that a suitable meter-scale (or smaller) detector situated downstream of an electron beam-dump can sensitively probe dark matter interacting via sub-GeV mediators, while B-factory searches cover the 1-5 GeV range. Combined, such experiments explore a well-motivated and otherwise inaccessible region of dark matter parameter space with sensitivity several orders of magnitude beyond existing direct detection constraints. These experiments would also probe invisibly decaying new gauge bosons ("dark photons") down to kinetic mixing of ε~ 10^{-4}, including the range of parameters relevant for explaining the (g-2)_μ discrepancy. Sensitivity to other long-lived dark sector states and to new milli-charge particles would also be improved.
description: 24 pages, 7 figures (v2: PRD version, references added, typos corrected, conclusions unchanged)
An Improved Temporal Formulation of Pupal Transpiration in Glossina
Creators: name: Childs, S. J.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Other Quantitative Biology (q-bio.OT)
subject: FOS: Biological sciences

description: The temporal aspect of a model of pupal dehydration is improved upon. The observed dependence of pupal transpiration on time is attributed to an alternation between two, essential modes, for which the deposition of a thin, pupal skin inside the puparium and its subsequent demise are thought to be responsible. For each mode of transpiration, the results of the Bursell (1958) investigation into pupal dehydration are used as a rudimentary data set. These data are generalised to all temperatures and humidities by invoking the property of multiplicative separability. The problem, then, is that as the temperature varies with time, so does the metabolism and the developmental stages to which the model data pertain, must necessarily warp. The puparial-duration formula of Phelps and Burrows (1969) and Hargrove (2004) is exploited to facilitate a mapping between the constant-temperature time domain of the data and that of some, more general case at hand. The resulting, Glossina morsitans model is extrapolated to other species using their relative surface areas, their relative protected and unprotected transpiration rates and their different fourth instar excretions (drawing, to a lesser extent, from the data of Buxton and Lewis, 1934). In this way the problem of pupal dehydration is formulated as a series of integrals and the consequent survival can be predicted. The discovery of a distinct definition for hygrophilic species, within the formulation, prompts the investigation of the hypothetical effect of a two-day heat wave on pupae. This leads to the conclusion that the classification of species as hygrophilic, mesophilic and xerophilic is largely true only in so much as their third and fourth instars are and, possibly, the hours shortly before eclosion.
description: 33 pages, 27 figures, 3 tables. arXiv admin note: text overlap with arXiv:0901.2470
On Anabelian Geometry of Mixed Characteristic Local Fields
Creators: Ge, Qi
Publisher: name: University of Alberta Library
Year: 2023

The aim of this thesis is to provide an exposition to Mochizuki and Hoshi's approach to birational anabelian geometry of mixed characteristic local fields.

In the introductory chapter, we begin by recalling the relevant backgrounds on the Grothendieck conjectures on the étale fundamental groups and their morphisms.

Next, we review mixed characteristic local fields and their local class field theory.

This leads us to derive that many invariants of a mixed characteristic local field can be reconstructed from its Galois group, but not the field itself.

We then set out to demonstrate that isomorphisms between mixed characteristic local fields, which preserve certain arithmetic structures such as the ramification filtration or the class of Hodge-Tate representation, are induced by isomorphisms between the fields.

We provide technical facts on Galois representations in support of this argument.
Additional file 1 of High-resolution magnetic resonance imaging-based radiomic features aid in selecting endovascular candidates among patients with cerebral venous sinus thrombosis
Creators: name: Chang, Yu-zhou
name: Zhu, Hao-Yu
name: Song, Yu-Qi
name: Tong, Xu
name: Li, Xiao-Qing
name: Wang, Yi-Long
name: Dong, Ke-Hui
name: Jiang, Chu-Han
name: Zhang, Yu-Peng
name: Mo, Da-Peng
Publisher: name: figshare
Year: 2023
Subjects: Biochemistry
Medicine
Cell Biology
Pharmacology
Biotechnology
Biological Sciences not elsewhere classified
Information Systems not elsewhere classified
Mathematical Sciences not elsewhere classified
Cancer

description: Supplementary Material 1
A Lower Bound on the Crossing Number of Uniform Hypergraphs
Creators: name: Anshu, Anurag
name: Shannigrahi, Saswata
Publisher: name: arXiv
Year: 2013
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics

description: In this paper, we consider the embedding of a complete $d$-uniform geometric hypergraph with $n$ vertices in general position in $\mathbb{R}^d$, where each hyperedge is represented as a $(d-1)$-simplex, and a pair of hyperedges is defined to cross if they are vertex-disjoint and contains a common point in the relative interior of the simplices corresponding to them. As a corollary of the Van Kampen-Flores Theorem, it can be seen that such a hypergraph contains $Ω(\frac{2^d}{\sqrt{d}})$ $n\choose 2d$ crossing pairs of hyperedges. Using Gale Transform and Ham Sandwich Theorem, we improve this lower bound to $Ω(\frac{2^d \log d}{\sqrt{d}})$ $n\choose 2d$.
A No-Scale Framework for Sub-Planckian Physics
Creators: name: Ellis, John
name: Nanopoulos, Dimitri V.
name: Olive, Keith A.
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We propose a minimal model framework for physics below the Planck scale with the following features: (i) it is based on no-scale supergravity, as favoured in many string compactifications, (ii) it incorporates Starobinsky-like inflation, and hence is compatible with constraints from the Planck satellite, (iii) the inflaton may be identified with a singlet field in a see-saw model for neutrino masses, providing an efficient scenario for reheating and leptogenesis, (iv) supersymmetry breaking occurs with an arbitrary scale and a cosmological constant that vanishes before radiative corrections, (v) regions of the model parameter space are compatible with all LHC, Higgs and dark matter constraints.
description: 6 pages, 2 figures, some minor corrections and additions. Final version
A high-throughput Computer Tomography-based Holographic Two-Photon Polymerization (TPP) method for Multi-Material (Wavelength-Selective/CurbCure/Upconversion) additive manufacturing under Continuous Phases (CT-MMW/CC-TPP4DAM-CP)
Creators: name: MENG, (Keys tiger) Hu
Publisher: name: figshare
Year: 2022
Subjects: subject: Additive Manufacturing
subject: 90606 Photonics and Electro-Optical Engineering (excl. Communications)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: A high-throughput Computer Tomography-based Holographic Two-Photon Polymerization (TPP) method for Multi-Material (Wavelength-Selective/CurbCure/Upconversion) additive manufacturing under Continuous Phases (CT-MMW/CC-TPP4DAM-CP)
Additional file 1 of Advanced lung cancer patient benefits from minimally invasive costal resection and reconstruction: an effective palliative approach for costal metastasis
Creators: name: Andreas, Marco N.
name: Böhmer, Dirk
name: Pratschke, Johann
name: Rückert, Jens C.
name: Elsner, Aron
Publisher: name: figshare
Year: 2023
Subjects: subject: Medicine
subject: Microbiology
subject: FOS: Biological sciences
subject: Biological Sciences not elsewhere classified
subject: Cancer
subject: Science Policy

description: Additional file 1: Table S1 Pre- and postoperative pain medication
Artificial Intelligence Approach to Analyse the Efficiency of Photosynthesis of Plants on the Biophysics Aspects of Agriculture
Creators: name: Dr. Anil Kumar
name: Kumar, Sandeep
name: Mrs Everest Shiwach
name: Dr Virendra Kumar Singh
name: Achyuta Basak
name: Dr. Shyamkant Shridhar Munje
name: Warghat, Anand Nagsen
name: Dr. Amanulla Khan
name: Dr Sumanta Bhattacharya
name: Pradip Kumar Saini
name: Dr.A.Sasi Kumar
name: Dr. Sushil Kumar
Publisher: name: Zenodo
Year: 2022

description: Artificial Intelligence Approach to Analyse the Efficiency of Photosynthesis of Plants on the Biophysics Aspects of Agriculture. (Patent Application No.202211065327). By Official Journal of the Patent Office India. The Patent Office Journal No. 48/2022 Dated: 02/12/2022 Page: 75884.
Transport properties of the Coulomb-Majorana junction
Creators: name: Zazunov, A.
name: Altland, A.
name: Egger, R.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We provide a comprehensive theoretical description of low-energy quantum transport for a Coulomb-Majorana junction, where several helical Luttinger liquid nanowires are coupled to a joint mesoscopic superconductor with finite charging energy. Including the Majorana bound states formed near the ends of superconducting wire parts, we derive and analyze the Keldysh phase action describing nonequilibrium charge transport properties of the junction. The low-energy physics corresponds to a two-channel Kondo model with symmetry group SO(M), where M is the number of leads connected to the superconductor. Transport observables, such as the conductance tensor or current noise correlations, display non-trivial temperature or voltage dependences reflecting non-Fermi liquid behavior.
description: 23 pages, 3 figures, final version to appear in New J. Phys. (one figure added)
Pollutants Level Identifying Device For Material Processing Site
Creators: name: Dr.Anthati Sreenivasulu
name: Dr. Amanulla Khan
name: Dr. Bharti Ghude
name: Dr Tarun Gehlot
name: Udit Mamodiya
Publisher: name: Zenodo
Year: 2023

description: Design Patent On “Pollutants Level Identifying Device For Material Processing Site” (Design Number: 378681-001. Application No.: 378681-001: Cbr Number: 201625). Accepted and Published, Journal No Is 16/2023 and Journal Date Is 21/04/2023. (Grant Certificate).
Self-consistent physical parameters for five intermediate-age SMC stellar clusters from CMD modelling
Creators: name: Dias, Bruno
name: Kerber, Leandro
name: Barbuy, Beatriz
name: Santiago, Basilio
name: Ortolani, Sergio
name: Balbinot, Eduardo
Publisher: name: arXiv
Year: 2013
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Context. Stellar clusters in the Small Magellanic Cloud (SMC) are useful probes for studying the chemical and dynamical evolution of this neighbouring dwarf galaxy, enabling inspection of a large period covering over 10 Gyr. Aims: The main goals of this work are the derivation of age, metallicity, distance modulus, reddening, core radius, and central density profiles for six sample clusters, in order to place them in the context of the Small Cloud evolution. The studied clusters are AM 3, HW 1, HW 34, HW 40, Lindsay 2, and Lindsay 3; HW 1, HW 34, and Lindsay 2 are studied for the first time. Methods: Optical colour-magnitude diagrams (V,B - V CMDs) and radial density profiles were built from images obtained with the 4.1 m Southern Astrophysical Research (SOAR) telescope, reaching V ~ 23. The determination of structural parameters were carried out by applying King profile fitting. The other parameters were derived in a self-consistent way by means of isochrone fitting, which uses likelihood statistics to identify the synthetic CMDs that best reproduce the observed ones. Membership probabilities were determined comparing the cluster and control field CMDs. Completeness and photometric uncertainties were obtained by performing artificial star tests. Results: The results confirm that these clusters (except HW 34, identified as a field fluctuation) are intermediate-age clusters, with ages between 1.2 Gyr (Lindsay 3) and ~5.0 Gyr (HW 1). In particular HW 1, Lindsay 2 and Lindsay 3 are located in a region that we called West Halo, where studies of ages and metallicity gradients are still lacking. Moreover, Lindsay 2 was identified as a moderately metal-poor cluster with [Fe/H] = -1.4 +/- 0.2 dex, lower than expected from the age-metallicity relation by Pagel & Tautvaisiene (1998). We also found distances varying from ~53 kpc to 66 kpc, compatible with the large depth of the SMC.
description: 14 pages, 15 figures; published in A&A
The 2:3:6 QPO structure in GRS 1915+105 and cubic subharmonics in the context of relativistic diskoseismology
Creators: name: Ortega-Rodríguez, Manuel
name: Solís-Sánchez, Hugo
name: López-Barquero, Vanessa
name: Matamoros-Alvarado, Bryan
name: Venegas-Li, Ariadna
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We propose a simple toy model to explain the 2:3:6 QPO structure in GRS 1915+105 and, more generally, the 2:3 QPO structure in XTE J1550-564, GRO J1655-40, and H 1743-322. The model exploits the onset of subharmonics in the context of diskoseismology. We suggest that the observed frequencies may be the consequence of a resonance between a fundamental g-mode and an unobservable p-wave. The results include the prediction that, as better data become available, a QPO with a frequency of twice the higher twin frequency and a large quality factor will be observed in twin peak sources, as it might already have been observed in the especially active GRS 1915+105.
description: 6 pages, 1 figure, accepted for publication in MNRAS
Sustaining the invisible contributions of women in small-scale fisheries
Creators: name: Fitzgerald, Maria
name: Hansen, Henry
name: Störmer, Maja
name: Sibanda, Arorisoe
Publisher: name: Zenodo
Year: 2023
Subjects: sustainable development goals
fisheries
gender equity

description: This policy brief aims to improve gender equality in small-
 scale fisheries by fostering quality educational initiatives, identifying
 barriers to gender equality and equity, and improving networking
 and policy implementations
Constraining the Source Craters of Unbrecciated Lunar Mare Basalt Meteorites
Creators: Mijajlovic, Tatiana
Publisher: name: University of Alberta Library
Year: 2023

MIL 05035, NWA 10597, NWA 8632, NWA 479 and NWA 4898 are all unbrecciated lunar mare basalt meteorites, interpreted to have individually experienced a single hypervelocity collision event that would have resulted in their ejection from the Moon. A comprehensive study of shock deformation and transformation effects constrain the upper and lower boundary limits of bulk shock pressures that would have been experienced during the ejection of each sample. Micro-Raman spectroscopy, electron imaging and optical properties were used characterize the structural state of calcic plagioclase (An80-90) within the meteorites, shock deformation and transformation in pyroxene and olivine, and the mineralogy and microtextures of shock melt within the samples. Confirmation of the partial or total amorphization of plagioclase feldspar to maskelynite constrains lower boundary ranges of 22 – 24 GPa for NWA 10597, 24 – 26 GPa for NWA 4898, and 25 – 27 GPa for MIL 05035, NWA 8632, and NWA 479. These pressures are associated with post-shock temperature increases < 200˚C. The shock deformation of olivine phenocrysts in the form of irregular fractures, weak mosaicism and planar fractures, accompanied by undulose extinction to weak mosaicism, and polysynthetic mechanical twinning of pyroxene phenocrysts constrain the upper limit of the shock pressure to 30 GPa for all five samples. High-pressure mineral investigations within the shock melt of the meteorites combined with Finite Element Heat Transfer (FEHT) modelling of cooling times provides constraints on the pressure-temperature-time history of each sample. This information then points the way for further determining the decay rate of the shock wave each sample experienced, the degree of adiabatic cooling involved in the post-shock environment and modelling the potential source crater diameters. These crater diameters in turn could be used as a potential parameter for constraining the geological unit from which these meteorites originated on the lunar surface.
Hopf Insulators and Their Topologically Protected Surface States
Creators: name: Deng, Dong-Ling
name: Wang, Sheng-Tao
name: Shen, Chao
name: Duan, Lu-Ming
Publisher: name: arXiv
Year: 2013
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Three-dimensional (3D) topological insulators in general need to be protected by certain kinds of symmetries other than the presumed $U(1)$ charge conservation. A peculiar exception is the Hopf insulators which are 3D topological insulators characterized by an integer Hopf index. To demonstrate the existence and physical relevance of the Hopf insulators, we construct a class of tight-binding model Hamiltonians which realize all kinds of Hopf insulators with arbitrary integer Hopf index. These Hopf insulator phases have topologically protected surface states and we numerically demonstrate the robustness of these topologically protected states under general random perturbations without any symmetry other than the $U(1)$ charge conservation that is implicit in all kinds of topological insulators.
description: 7 pages (including supplemental material), 4 figures
Table Union Search with Preferences
Creators: Mirzaei, Hamed
Publisher: name: University of Alberta Library
Year: 2023

We study the problem of Table Union Search (TUS) in the presence of preferences. Two tables are unionable if their column values are drawn from the same domains. This notion of unionability is too coarse to be effective in down-stream tasks.

The result of a table search for unionability is often less relevant to the needs of users, and selecting top few is subjective and depends on the follow-up operations.

This thesis introduces preferences for table unionability, as a way to reduce the search space and focus on rows and columns that are important for the follow-up operations. But, adding preferences introduces a few challenges to the process. Firstly, one may need extra information such as the relationship between webtables which TUS does not consider. Secondly, there is usually additional overload, which can be costly when searching a large set of webtables. We study a few approaches to address these challenges.

We evaluate the efficiency and effectiveness of preferences on three down-stream tasks, showing that adding preferences significantly improves the performance of these tasks.
title: Archäologie kann Jeder? Ein Situationsbericht zum schulischen Einsatz und der Lehrkraftausbildung in Bayern
Creators: name: Engelien-Schmidt, Isabella
Publisher: name: University Library Heidelberg
Year: 2013

description: Der Beitrag stellt eine Bilanz zur Umsetzung der Weißenburger Erklärung in Bayern dar. Er führt die vielen Unterrichtsmöglichkeiten an, die die Schulen in Bayern zwar bieten, die sich jedoch nur eingeschränkt umsetzen lassen, obwohl die Archäologie bei den Schülern und Lehrkräften Interesse weckt. Deshalb versucht der Beitrag die Gründe darzulegen und Lösungen aufzuzeigen. Abschließend wird Bezug auf die Ausbildung der Lehramtskandidaten genommen.
description: This paper presents an assessment on the implementation of the Weißenburger declaration in Bavaria. This cites the many teaching opportunities available to schools in Bavaria. However, implementation faces many restrictions, although the archeology arouses the students ‘and teachers’ interest. Therefore, this article identifies the reasons and attempts to offer solutions. Finally, reference is made to the training of teacher candidates.
title: „Archäologie im Museum“. Das Rheinische Landesmuseum Trier als Beispiel
Creators: name: Kurtze, Anne
Publisher: name: University Library Heidelberg
Year: 2013

description: Archäologie im Museum zu vermitteln ist eine besondere Aufgabe. Oft kommen gerade archäologische Herangehensweisen und Fragestellungen in der musealen Darstellung, die meist historisch-kontextualisierend ist und damit historische Ansätze wählt, zu kurz. Der Beitrag will auf diese Spannung in einem archäologischen Museum aufmerksam machen und zeigen, wie der bewusste Umgang mit Archäologie im Museum in unterschiedlichen Kontexten möglich ist. Dies geschieht anhand verschiedener Beispiele aus der museumsdidaktischen Arbeit des Rheinischen Landesmuseums Trier. Thematisiert werden Lösungen in der neu eingerichteten Dauerausstellung des Museums sowie bei Schulklassenführungen, weiterhin wird das „Archäologie-Mobil“ vorgestellt, das in Schulen, Bildungseinrichtungen und Veranstaltungen die archäologische Arbeit vermitteln soll.
description: Conveying archeology at the museum is a specific responsibility. Often museum presentation focuses on the historical context by choosing only an historical approach; archaeological approaches, questions and analysis are neglected. The following paper aims to raise awareness of this particular conflict in archeological museums and shows how the conscious use of archeology at the museum can be realized in different contexts. This is done by using various examples from the museum‘s educational work of the Rheinisches Landesmuseum in Trier. The permanent exhibition of the museum, educational activities for classes or groups and the “archeology-van” which presents archaeological work outside of the museum to the schools and educational institutions are analyzed and discussed in this
thesis.
Isovector and hidden-beauty partners of the X(3872)
Creators: name: Hogaasen, Hallstein
name: Kou, Emi
name: Richard, Jean-Marc
name: Sorba, Paul
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: The isovector partners of the X(3872), recently found at BES III, Belle and CLEO-c were predicted in a simple model based on the chromomagnetic interaction among quarks (H. Hogaasen, J-M. Richard and P. Sorba, Phys. Rev. D73, 054013, 2006). The extension to the hidden-beauty sector is discussed.
description: Some references added. More details on the width and decay modes. To appear in Phys. Lett. B
Control of Sensorless Articulated Manipulators using Vision-based Estimation Techniques
Creators: Singh, Charanjot
Publisher: name: University of Alberta Library
Year: 2023

Conventional control of an articulated manipulator such as robot arms involves the use of sensor measurements of joint values to calculate the position and orientation of the end-effector and to perform motion control. Conversely, in cases where direct sensing is not available, a vision-based method can prove to be advantageous. This thesis deals with one such system, an excavator used regularly at construction sites, with the long-term goal of enabling fully autonomous operation. For our hardware experiments, we used a scale excavator model inside a lab setting, using a single external monocular camera to estimate the joint states of the vehicle in real-time and using the resulting information to run motion planning.

Our solution employs a computer vision algorithm integrated with numerical optimization to perform 2D and 3D pose estimation, respectively, from single RGB image frames in real-time. We use a limited collection of real images for training, in contrast to other approaches presented in the literature which require a CAD model to generate a large set of synthetic data. We leverage geometric constraints of the manipulator and the camera's optical parameters within our iterative optimization step. We also build a custom microcontroller-based system to drive the scale excavator from a desktop computer. The experimental results are benchmarked against a high-fidelity optical motion capture system installed in our lab to quantify the accuracy of our estimates. Since our proposed method relies only on a small training dataset and geometric information about the manipulator, it can readily be ported onto larger manipulator systems, such as large industrial excavators or cranes found on real construction sites.
Assessing the station holding ability of three benthic fishes exposed to flow augmentation: Implications for a species at risk
Creators: MacLeod, Taylor (Macs) K.
Publisher: name: University of Alberta Library
Year: 2023

Flow augmentation forces Plains Sucker in the Milk River to adopt more efficient station holding mechanisms, which must be energetically costly as they are not maintained year-round. The station holding ability of Milk River Plains Sucker was measured using a Brett-style swim tunnel respirometer, and the results were compared to other catostomid species in the Milk River and to Plains Sucker caught in water bodies that remain unmodified year-round. Milk River Plains Sucker maintained a significantly

higher estimated marginal mean failure velocity (p < 0.0001) during augmentation (June-July) compared to natural flows (September-October). Catostomids in Milk River exhibited varying degrees of response; from no change in response to augmentation (Longnose Sucker, p = 0.5) to a significant shift (Plains Sucker and White Sucker p = 0.0001). Plains Sucker from unmodified water bodies demonstrated at most a minor change in performance between sampling periods (Battle Creek, p = 0.041; Caton Creek p = 0.068). The substantial energetic input into station holding may result in life history trade-offs impacting the populations’ continued existence in this part of its native range.
Multilayer wave functions: A recursive coupling of local excitations
Creators: name: Ramezanpour, A.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Finding a succinct representation to describe the ground state of a disordered interacting system could be very helpful in understanding the interplay between the interactions that is manifested in a quantum phase transition. In this work we use some elementary states to construct recursively an ansatz of multilayer wave functions, where in each step the higher-level wave function is represented by a superposition of the locally "excited states" obtained from the lower-level wave function. This allows us to write the Hamiltonian expectation in terms of some local functions of the variational parameters, and employ an efficient message-passing algorithm to find the optimal parameters. We obtain good estimations of the ground-state energy and the phase transition point for the transverse Ising model with a few layers of mean-field and symmetric tree states. The work is the first step towards the application of local and distributed message-passing algorithms in the study of structured variational problems in finite dimensions.
description: 23 pages, including 3 appendices and 6 figures. A shortened version published in EPL
Generalized effective hamiltonian for graphene under non-uniform strain
Creators: name: Mañes, Juan L.
name: de Juan, Fernando
name: Sturla, Mauricio
name: Vozmediano, María A. H.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We use a symmetry approach to construct a systematic derivative expansion of the low energy effective Hamiltonian modifying the continuum Dirac description of graphene in the presence of non-uniform elastic deformations. We extract all experimentally relevant terms and describe their physical significance. Among them there is a new gap-opening term that describes the Zeeman coupling of the elastic pseudomagnetic field and the pseudospin. We determine the value of the couplings using a generalized tight binding model.
description: 13 pages, 1 figure. Matches published version + 1 footnote added, typos corrected
UV Aging of Polyurethane Films and its Application for A Graphene-Based End-of-Life Sensor
Creators: Khemir, Marwa
Publisher: name: University of Alberta Library
Year: 2023

To improve the safety of workers in high-risk industries like firefighting, our research group at the University of Alberta has collaborated with industry partners to develop an end-of-life sensor. This sensor consists of three individual sensors - a heat sensor, a UV sensor, and a moisture sensor - designed to simulate the effects of specific conditions on the outer shell fabric of firefighter's protective garments. It includes a sacrificial polymer layer that degrades over time, in contact with a graphene conductive track. By monitoring the decrease in conductivity of the graphene track as the sacrificial layer degrades, we can predict the eventual loss of protective properties of the fabric, without destroying it. This non-destructive method can ensure the performance of protective clothing, and ultimately improve worker safety.

In this thesis, the sacrificial polymer for the UV-sensitive part of a graphene-based end-of-life sensor for fire-protective fabrics is investigated. A commercial 2-pack polyurethane (2-PUR) emerged as a favorable candidate, demonstrating a high degree of sensitivity to UV radiation, flexibility, durability. It can also be cast into a film form, and it is water-resistant. Moreover, it passed the NFPA 1971 heat resistance requirement for fire-fighting ensemble components. UV exposure on the 2-PUR makes the material increasingly brittle over time, leading to an eventual fractured. Notably, the kinetics of UV degradation of the 2-PUR was compared to that of a fabric used as an outer shell of fire-protective clothing. In addition, the activation energy, corresponding to the effect of temperature on the UV aging was computed using the combination of time-temperature-superposition principle and Arrhenius plot. When UV stabilizers were added to the 2-PUR, the degradation of the film was delayed, enabling us to tune the end-of-life sensor response to the degradation kinetics of various fire-protective fabrics used in firefighters’ protective clothing.

This study's results can provide practical guidelines for the use of a 2-PUR system as a sacrificial polymer layer to simulate the UV degradation of fire-resistant fabric in end-of-life UV sensors. The creation of the graphene-based end-of-life sensor for fire-protective fabrics represents a significant milestone for the protective clothing industry as a novel non-destructive method of assessing the fabric’s degradation, particularly for firefighters' safety.
High-Dimensional Random Fields and Random Matrix Theory
Creators: name: Fyodorov, Yan V
Publisher: name: arXiv
Year: 2013
Subjects: subject: Mathematical Physics (math-ph)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Probability (math.PR)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: Our goal is to discuss in detail the calculation of the mean number of stationary points and minima for random isotropic Gaussian fields on a sphere as well as for stationary Gaussian random fields in a background parabolic confinement. After developing the general formalism based on the high-dimensional Kac-Rice formulae we combine it with the Random Matrix Theory (RMT) techniques to perform analysis of the random energy landscape of $p-$spin spherical spinglasses and a related glass model, both displaying a zero-temperature one-step replica symmetry breaking glass transition as a function of control parameters (e.g. a magnetic field or curvature of the confining potential). A particular emphasis of the presented analysis is on understanding in detail the picture of "topology trivialization" (in the sense of drastic reduction of the number of stationary points) of the landscape which takes place in the vicinity of the zero-temperature glass transition in both models. We will reveal the important role of the GOE "edge scaling" spectral region and the Tracy-Widom distribution of the maximal eigenvalue of GOE matrices for providing an accurate quantitative description of the universal features of the topology trivialization scenario.
description: 40 pages; 2 figures; In this version the original lecture notes are converted to an article format, new Eqs. (82)-(85) and Appendix about anisotropic fields added, noticed misprints corrected, references updated. references updated
de Finetti reductions for correlations
Creators: name: Arnon-Friedman, Rotem
name: Renner, Renato
Publisher: name: arXiv
Year: 2013
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: When analysing quantum information processing protocols one has to deal with large entangled systems, each consisting of many subsystems. To make this analysis feasible, it is often necessary to identify some additional structure. de Finetti theorems provide such a structure for the case where certain symmetries hold. More precisely, they relate states that are invariant under permutations of subsystems to states in which the subsystems are independent of each other. This relation plays an important role in various areas, e.g., in quantum cryptography or state tomography, where permutation invariant systems are ubiquitous. The known de Finetti theorems usually refer to the internal quantum state of a system and depend on its dimension. Here we prove a different de Finetti theorem where systems are modelled in terms of their statistics under measurements. This is necessary for a large class of applications widely considered today, such as device independent protocols, where the underlying systems and the dimensions are unknown and the entire analysis is based on the observed correlations.
description: 5+13 pages; second version closer to the published one; new title
DSP-Based PWM Carrier Transition Technique for Parallel Connected Two-level VSCs
Creators: Yapa, Dohitha
Publisher: name: University of Alberta Library
Year: 2023

The developments in the field of electrical engineering over the years have expanded the types of electricity generation, distribution and utilization. With these developments, power conversion plays an important role. As the demand grows, higher power handling capacity is expected of the converters. Three-phase two level voltage source converters are connected in parallel to increase the current rating and thereby meet the increasing power handling requirement under restrained voltages. Interleaved switching of parallel converters improves the system performance and can be achieved using phase-shifted carrier-based PWM. The line-to-line voltage can be further improved by alternating between two sets of carriers, although it results in jumps in the circulating current and in the flux in the inductor cores between the parallel inverters.

A transition technique to switch between carriers is presented, which eliminates the jumps in the circulating currents and the flux. The technique uses high frequency transitional carriers to switch from one set of carriers to the other. This technique ensures that the output voltage is unaffected and the output current waveforms are glitch-free during the transitions, which is an important feature over the techniques in already existing literature. The high frequency carrier transition technique is generalized for an arbitrary number of parallel converters and is tested in a coupled inductor inverter with 2 inverter legs per phase connected in parallel. It is implemented in a low-cost DSP environment. Sawtooth carriers are used to transition between carriers with different frequencies easily and reliably. But to maintain the quality of the output similar to that of the triangular carriers, the reference and the PWM switching logic is manipulated appropriately.

The effectiveness of the developed PWM technique has been verified using simulations and experimental results obtained with a dc link voltage of 300 V. The performance of the technique is compared with regular phase-shifted PWM and enhanced phase-shifted PWM where carriers are changed instantaneously. The circulating currents, flux in the cores, line-to-line output voltages and load currents show significant improvement over the other techniques.
title: Frühes Rössen auf der Aldenhovener Platte – Datierung mittelneolithischer Keramik aus den Siedlungen „Aldenhoven 1“ und „Schleiden 3“
Creators: name: Matzerath, Simon
name: Pavlovic, Markus
Publisher: name: University Library Heidelberg
Year: 2013

description: Die Aldenhovener Platte ist ein traditionelles Forschungsgebiet für die Siedlungsarchäologie des Neolithikums. Bislang unveröffentlichte Altfunde aus Oberflächenbegehungen im Bereich der mittelneolithischen Fundstellen Aldenhoven 1 und Schleiden 3 ließen sich mithilfe einer neuen Datierungsgrundlage feinchronologisch einordnen. Dazu wurden die Verzierungsmotive der Gefäßeinheiten aufgenommen und ein Bezug zu vorhandenen Seriationswerten hergestellt. Die Gefäßeinheiten der Lesefunde aus Aldenhoven 1 weisen dabei die gleiche Datierung auf, wie die bei der Ausgrabung dieser Siedlung im Rahmen des Projektes „Siedlungsarchäologie des Neolithikums auf der Aldenhovener Platte“ (SAP) geborgene Keramik. Spannend ist die Einordnung der bislang undatierten Fundstelle Schleiden 3 in die Frühphase der Rössener Keramik im Rheinland. Aufgrund ihrer Größe und chronologischen Stellung kommt der Siedlung von Schleiden 3 eine wichtige Funktion innerhalb des Siedlungsgefüges der Rössener Keramik auf der Aldenhovener Platte zu.
description: By tradition the Aldenhovener Platte is a field of study for settlement archaeology of the Neolithic. Up to now unpublished finds from surveyings within the areas of the middle neolithic sites Aldenhoven 1 and Schleiden 3 could be dated rather precisely, based on a new fine chronology for the Rössen period in the Rhineland. For this purpose the patterns of decoration of separate vessel units were taken into record and combined with values of previous seriations. The vessel units composed by stray finds of Aldenhoven 1 confirmed the dating of the excavation finds from this settlement, recovered during the project “Siedlungsarchäologie des Neolithikums auf der Aldenhovener Platte” (Neolithic Settlement Archaeology on the Aldenhoven plain). Of special interest however is the allocation of the previously undated site Schleiden 3 into the early period of Rössen pottery in the Rhineland. Due to its size this settlement incorporates an important position within the arrangement of settlements with Rössen pottery on the Aldenhovener Platte.
title: Bein statt Stein – Knochenartefakte aus dem bolivianischen Amazonastiefland
Creators: name: Kühlem, Annette
Publisher: name: University Library Heidelberg
Year: 2013

description: Die Auswertung der beinernen Artefakte aus der Loma Salvatierra, einem großen Siedlungshügel im bolivianischen Amazonastiefland, erlaubte Einblicke in vielfältige Lebensbereiche der präspanischen Bewohner. Mit Knochenartefakten wurde ein breites Funktionsspektrum abgedeckt: Die große Anzahl an Projektilspitzen lässt darauf schließen, dass die Jagd für die Subsistenz eine große Rolle spielte, aufwändige Trachtbestandteile und Beigaben veranschaulichen den Wert der beinernen Rohstoffe, Flöten aus Vogelknochen deuten auf eine Nutzung in rituellem Kontext hin. Die diachrone Analyse zeigte sowohl Unterschiede in der Bedeutung der verschiedenen Typen im Laufe der Zeit als auch in der Verwendung verschiedener Tierarten für die Herstellung. Das Fehlen von lithischem Rohstoff in der Region wurde durch die vielfältige Nutzung von Knochen, Zahn, Geweih und Muschel kompensiert, was eine besondere Adaption an die Umweltbedingungen darstellt.
description: The analysis of bone artefacts from the Loma Salavatierra, a big settlement mound in the Bolivian Amazon basin, enabled insights into various aspects of life in prehispanic times. The artefacts from animal materials had a wide range of functions: The large number of projectile points shows the importance of hunting for subsistence, extraordinary and elaborate adornments and grave goods show that the material was greatly valued, flutes from bird bones indicate the use in ritual context. The diachronic evaluation showed that there are notable differences in the percental significance of certain tools types over time and a change in animal species used for the production of bone artefacts. The absence of lithic raw material in the region was compensated by using bone, teeth, antler and shell for the production of artefacts, thus adapting to the environmental challenges of the surroundings.
title: Museum oder außerschulischer Lernort bei straffem Lehrplan?
Creators: name: Engelien-Schmidt,
name: Flügel, Christof
name: Baumann, Maria
name: Lüning, Jens
Publisher: name: University Library Heidelberg
Year: 2013

description: Der Beitrag setzt sich mit den Umstrukturierungen an bayerischen Schulen, insbesondere der Gymnasien und außerschulischen Lernorte auseinander, durch die sich die Rahmenbedingungen für Besuche ändern. Verschiedene Möglichkeiten und Potenziale der außerschulischen Lernorte, um dennoch für die Schulen attraktiv zu bleiben, werden angeführt. Zusätzlich werden ausgewählte Museumskonzepte in Bayern vorgestellt, die dem Ansatz der ganzheitlichen Bildung entgegen kommen.
description: This article deals with the restructuring in Bavarian schools, especially secondary schools and after-school learning sites, through which the prerequisites for attendance have changed. Various possibilities and potential of after-school learning sites to keep up the interest in schools are explored and listed. In addition, selected Bavarian museum concepts are presented, thereby approaching the goal of holistic education.
Cosmological Fluid Mechanics with Adaptively Refined Large Eddy Simulations
Creators: name: Schmidt, W.
name: Almgren, A. S.
name: Braun, H.
name: Engels, J. F.
name: Niemeyer, J. C.
name: Schulz, J.
name: Mekuria, R. R.
name: Aspden, A. J.
name: Bell, J. B.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We investigate turbulence generated by cosmological structure formation by means of large eddy simulations using adaptive mesh refinement. In contrast to the widely used implicit large eddy simulations, which resolve a limited range of length scales and treat the effect of turbulent velocity fluctuations below the grid scale solely by numerical dissipation, we apply a subgrid-scale model for the numerically unresolved fraction of the turbulence energy. For simulations with adaptive mesh refinement, we utilize a new methodology that allows us to adjust the scale-dependent energy variables in such a way that the sum of resolved and unresolved energies is globally conserved. We test our approach in simulations of randomly forced turbulence, a gravitationally bound cloud in a wind, and the Santa Barbara cluster. To treat inhomogeneous turbulence, we introduce an adaptive Kalman filtering technique that separates turbulent velocity fluctuations on resolved length scales from the non-turbulent bulk flow. From the magnitude of the fluctuating component and the subgrid-scale turbulence energy, a total turbulent velocity dispersion of several 100 km/s is obtained for the Santa Barbara cluster, while the low-density gas outside the accretion shocks is nearly devoid of turbulence. The energy flux through the turbulent cascade and the dissipation rate predicted by the subgrid-scale model correspond to dynamical time scales around 5 Gyr, independent of numerical resolution.
description: 29 pages, 31 figures, revised version accepted for publication by MNRAS