cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Efficient Auto-Vectorization for Control-flow Dependent Loops through Data Permutation
Creators: Paktinatkeleshteri, Rouzbeh
Publisher: name: University of Alberta Library
Year: 2023

The presence of control-flow divergence in loops can either hinder or impede auto-vectorization as a compiler transformation to exploit parallelism enabled by Single-Instruction Multiple-Data (SIMD) instructions. A solution is to linearize control flow through the use of predicated execution. However, computation resources are wasted when predicated instructions are executed but not committed because of a false predicate. Alternative approaches optimisticallyavoid predicated instructions when all conditions in a vectorized loop iteration evaluate to the same value. However, dynamic uniformity is less frequent in long vectors. Active-Lane-Consolidation (ALC) was proposed to form uniformvectors dynamically by merging active elements from different iterations. In its seminal presentation, ALC was only evaluated in a simulated environment through hand-modified programs. This thesis presents the first performance evaluation of ALC on real hardware which reveals that the original design of ALC indeed reduces the number of executed instructions, but it fails to provide speedup over auto-vectorized code. It then presents a change to the design of ALC that results in it outperforming auto-vectorized code and describes the first compiler-enabled transformation that applies ALC as a compiler optimization pass. The experimental results show that compiler-generated ALC codeoutperforms auto-vectorized code, produced by state-of-the-art compilers, by up to 79%.
Sonnenfleckenzeichnung Nr. 243.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 17.11.2015, 10:30, erstellt von Sergio Cortesi
Creators: name: Observatorium Specola Solare Ticinese Locarno (1957 bis 1980 Teil der Eidgenössischen Sternwarte der ETH Zürich)
Publisher: name: [s.n.]
Year: 2015

description: Bleistiftzeichnung mit schwarzer Farbe und Bleistift, erstellt als Projektionsbildzeichnung für die Beobachtungen in Locarno-Monti auf einem eigenen Vordruck. Instrument: Zeiss-Coudé-Refraktor mit 15 cm Öffnung und 225 cm Brennweite. Bildqualität (SIDC): 2.
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden auf dem Vordruck eingetragen. Zusätzlich sind zuhanden der späteren statistischen Verarbeitung die Angaben für die Bestimmung der Fleckenrelativzahl notiert.
Beobachtungstätigkeit unter eigenständiger Leitung (Associazione Specola Solare Ticinese ASST)
Multilayer Networks
Creators: name: Kivelä, Mikko
name: Arenas, Alexandre
name: Barthelemy, Marc
name: Gleeson, James P.
name: Moreno, Yamir
name: Porter, Mason A.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Physics and Society (physics.soc-ph)
subject: Social and Information Networks (cs.SI)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: In most natural and engineered systems, a set of entities interact with each other in complicated patterns that can encompass multiple types of relationships, change in time, and include other types of complications. Such systems include multiple subsystems and layers of connectivity, and it is important to take such "multilayer" features into account to try to improve our understanding of complex systems. Consequently, it is necessary to generalize "traditional" network theory by developing (and validating) a framework and associated tools to study multilayer systems in a comprehensive fashion. The origins of such efforts date back several decades and arose in multiple disciplines, and now the study of multilayer networks has become one of the most important directions in network science. In this paper, we discuss the history of multilayer networks (and related concepts) and review the exploding body of work on such networks. To unify the disparate terminology in the large body of recent work, we discuss a general framework for multilayer networks, construct a dictionary of terminology to relate the numerous existing concepts to each other, and provide a thorough discussion that compares, contrasts, and translates between related notions such as multilayer networks, multiplex networks, interdependent networks, networks of networks, and many others. We also survey and discuss existing data sets that can be represented as multilayer networks. We review attempts to generalize single-layer-network diagnostics to multilayer networks. We also discuss the rapidly expanding research on multilayer-network models and notions like community structure, connected components, tensor decompositions, and various types of dynamical processes on multilayer networks. We conclude with a summary and an outlook.
description: Working paper; 59 pages, 8 figures
Theory of metal-intercalated phenacenes: Why molecular valence 3 is special
Creators: name: Dutta, Tirthankar
name: Mazumdar, Sumit
Publisher: name: arXiv
Year: 2013
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We develop a correlated-electron minimal model for the normal state of charged phenanthrene ions in the solid state, within the reduced space of the two lowest antibonding molecular orbitals of phenanthrene. Our model is general and can be easily extended to study the normal states of other polycyclic aromatic hydrocarbon superconductors. The main difference between our approach and previous correlated-electron theories of phenacenes is that our calculations are exact within the reduced basis space, albeit for finite clusters. The enhanced exchange of electron populations between these molecular orbitals, driven by Coulomb interactions over and above the bandwidth effects, gives a theoretical description of the phenanthrene trianions that is very different from previous predictions. Exact many-body finite cluster calculations show that while the systems with molecular charges of $-$1 and $-$2 are one- and two-band Mott-Hubbard semiconductors, respectively, molecular charge $-$3 gives two nearly $\frac{3}{4}$-filled bands, rather than a completely filled lower band and a $\frac{1}{2}$-filled upper band. The carrier density per active molecular orbital is thus nearly the same in the normal state of the superconducting aromatics and organic charge-transfer solids, and may be the key to understanding unconventional superconductivity in these molecular superconductors.
description: Published in Phys. Rev. B. Title changed on editorial request. In all, 13 pages, 14 captioned figures, and 2 tables
Sonnenfleckenzeichnung Nr. 206.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 04.10.2015, 11:00, erstellt von Sergio Cortesi
Creators: name: Observatorium Specola Solare Ticinese Locarno (1957 bis 1980 Teil der Eidgenössischen Sternwarte der ETH Zürich)
Publisher: name: [s.n.]
Year: 2015

description: Bleistiftzeichnung mit schwarzer Farbe und Bleistift, erstellt als Projektionsbildzeichnung für die Beobachtungen in Locarno-Monti auf einem eigenen Vordruck. Instrument: Zeiss-Coudé-Refraktor mit 15 cm Öffnung und 225 cm Brennweite. Bildqualität (SIDC): 3.
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden auf dem Vordruck eingetragen. Zusätzlich sind zuhanden der späteren statistischen Verarbeitung die Angaben für die Bestimmung der Fleckenrelativzahl notiert.
Beobachtungstätigkeit unter eigenständiger Leitung (Associazione Specola Solare Ticinese ASST)
A measurement of the surface radioactivity and its time dependence in the SNO+ detector
Creators: Yazigi, Karl
Publisher: name: University of Alberta Library
Year: 2023

This thesis provides an investigation of various aspects of the major background in

the SNO+ experiment and its associated detector.

The initial chapters present an overview of neutrino physics and the SNO+ detector, providing relevant background information.

The impact of light reflection on the detector surface and its influence on event

position reconstruction is investigated. A novel methodology is introduced to detect

mis-reconstructed events, effectively mitigating the issue. Mis-reconstruction is eliminated within a radius of 5.1m from the detector center and significantly reduced by

a factor of 400 within a radius of 5.5m.

The flow patterns of unmixed 210Po within the detector are investigated, and the

volume flow rate of this material is estimated to be V

t = 0.11±0.019 m3

h

. The origin of

this material is traced to approximately 10cm from the surface of the detector using

the authors mis-reconstruction detection algorithm.

The thesis also focuses on the examination and separation of individual event rates

for major backgrounds on the detector surface: 210Po, 210Bi, and 14C. A theoretical

simulation of the 210Bi energy spectrum is employed, which is then compared to the

observed energy spectrum within the detector. Through analysis, separate event

rates for each isotope are determined. Rates of 210Po and 210Bi are found to be in

equilibrium.
Exploding Core-Collapse Supernovae by Jets-Driven Feedback Mechanism
Creators: name: Papish, Oded
name: Soker, Noam
Publisher: name: arXiv
Year: 2013
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We study the flow structure in the jittering-jets explosion model of core-collapse supernovae (CCSNe) using 2.5D hydrodynamical simulations and find that some basic requirements for explosion are met by the flow. In the jittering-jets model jets are launched by intermittent accretion disk around the newly born neutron star and in stochastic directions. They deposit their kinetic energy inside the collapsing core and induce explosion by ejecting the outer core. The accretion and launching of jets is operated by a feedback mechanism: when the jets manage to eject the core, the accretion stops. We find that even when the jets' directions are varied around the symmetry axis they inflate hot bubbles that manage to expel gas in all directions. We also find that although most of the ambient core gas is ejected outward, sufficient mass to power the jets is accreted (0.1Mo), mainly from the equatorial plane direction. This is compatible with the jittering jets explosion mechanism being a feedback mechanism.
description: Accepted to publication in MNRAS
Competing Demands in Times of Crisis: The Effects of the COVID-19 Pandemic on the Lives of Graduate Student Mothers
Creators: DeKeseredy, Andrea
Publisher: name: University of Alberta Library
Year: 2023

This thesis explores how the lives of graduate student mothers at the University of Alberta changed during the outbreak of the coronavirus disease, COVID-19. Using a qualitative descriptive approach, I interviewed 19 graduate student mothers from various programs using a maximum variation strategy to recruit participants from a diverse set of backgrounds. A critical, reflexive thematic analysis revealed that the COVID-19 pandemic led to a loss of control in graduate student mothers' lives due to a decrease in childcare and new ways of responding to common illness. Institutional decisions from the government and the university influenced the loss of control through negatively perceived government policy and the simultaneous restructuring of the University of Alberta, exacerbating relational inequality and reinforcing inequality regimes. Predictability and planning are needed to balance the competing role of mother and student, and the loss of control from the pandemic resulted in mothers having to readjust their academic goals and extend the amount of time needed to complete their degrees. The forced readjustment of mothers’ goals was shaped through an organizational context which constrained the options available to them and increased their difficulty in accessing organizational resources. For some participants the shift to online learning was a benefit, allowing them to reduce their work-family-conflict. The findings of this thesis inform a definition of the “ideal graduate student”, someone who can meet the requirements of graduate work in a neoliberalized university with dwindling resources. Finally, this thesis puts forward suggestions that would resist inequality regimes in the academy and assist graduate student mothers in achieving their academic goals. The findings are useful to policymakers and activists working towards gender equity in academia and other institutions that share similar organizational patterns.
Acyclic, connected and tree sets
Creators: name: Berthé, Valerie
name: De Felice, Clelia
name: Dolce, Francesco
name: Leroy, Julien
name: Perrin, Dominique
name: Reutenauer, Christophe
name: Rindone, Giuseppina
Publisher: name: arXiv
Year: 2013
Subjects: subject: Combinatorics (math.CO)
subject: Formal Languages and Automata Theory (cs.FL)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences

description: Given a set $F$ of words, one associates to each word $w$ in $F$ an undirected graph, called its extension graph, and which describes the possible extensions of $w$ on the left and on the right. We investigate the family of sets of words defined by the property of the extension graph of each word in the set to be acyclic or connected or a tree. We prove that in a uniformly recurrent tree set, the sets of first return words are bases of the free group on the alphabet. Concerning acyclic sets, we prove as a main result that a set $F$ is acyclic if and only if any bifix code included in $F$ is a basis of the subgroup that it generates.
description: arXiv admin note: substantial text overlap with arXiv:1305.0127, arXiv:1011.5369, Monatsh. Math. (2015)
Sonnenfleckenzeichnung Nr. 16.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 24.01.2015, 09:00, erstellt von Sergio Cortesi
Creators: name: Observatorium Specola Solare Ticinese Locarno (1957 bis 1980 Teil der Eidgenössischen Sternwarte der ETH Zürich)
Publisher: name: [s.n.]
Year: 2015

description: Bleistiftzeichnung mit schwarzer Farbe und Bleistift, erstellt als Projektionsbildzeichnung für die Beobachtungen in Locarno-Monti auf einem eigenen Vordruck. Instrument: Zeiss-Coudé-Refraktor mit 15 cm Öffnung und 225 cm Brennweite. Bildqualität (SIDC): 3.
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden auf dem Vordruck eingetragen. Zusätzlich sind zuhanden der späteren statistischen Verarbeitung die Angaben für die Bestimmung der Fleckenrelativzahl notiert.
Beobachtungstätigkeit unter eigenständiger Leitung (Associazione Specola Solare Ticinese ASST)
Sonnenfleckenzeichnung Nr. 105.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 29.05.2015, 08:30, erstellt von Marco Cagnotti
Creators: name: Observatorium Specola Solare Ticinese Locarno (1957 bis 1980 Teil der Eidgenössischen Sternwarte der ETH Zürich)
Publisher: name: [s.n.]
Year: 2015

description: Bleistiftzeichnung mit schwarzer Farbe und Bleistift, erstellt als Projektionsbildzeichnung für die Beobachtungen in Locarno-Monti auf einem eigenen Vordruck. Instrument: Zeiss-Coudé-Refraktor mit 15 cm Öffnung und 225 cm Brennweite. Bildqualität (SIDC): 4.
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden auf dem Vordruck eingetragen. Zusätzlich sind zuhanden der späteren statistischen Verarbeitung die Angaben für die Bestimmung der Fleckenrelativzahl notiert.
Beobachtungstätigkeit unter eigenständiger Leitung (Associazione Specola Solare Ticinese ASST)
Pressure dependent relaxation in the photo-excited Mott insulator ETF2TCNQ: Influence of hopping and correlations on quasiparticle recombination rates
Creators: name: Mitrano, M.
name: Cotugno, G.
name: Clark, S. R.
name: Singla, R.
name: Kaiser, S.
name: Staehler, J.
name: Beyer, R.
name: Dressel, M.
name: Baldassarre, L.
name: Nicoletti, D.
name: Perucchi, A.
name: Hasegawa, T.
name: Okamoto, H.
name: Jaksch, D.
name: Cavalleri, A.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Femtosecond relaxation of photo-excited quasiparticles in the one dimensional Mott insulator ET-F2TCNQ are measured as a function of external pressure, which is used to tune the electronic structure. By fitting the static optical properties and measuring femtosecond decay times at each pressure value, we correlate the relaxation rates with the electronic bandwidth t and on the intersite correlation energy V. The scaling of relaxation times with microscopic parameters is different than for metals and semiconductors. The competition between localization and delocalization of the Mott-Hubbard exciton dictates the efficiency of the decay, as exposed by a fit based on the solution of the time-dependent extended Hubbard Hamiltonian.
description: 24 pages, 7 figures, final version including supplementary materials
Sonnenfleckenzeichnung Nr. 112.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 06.06.2015, 10:00, erstellt von Andrea Manna
Creators: name: Observatorium Specola Solare Ticinese Locarno (1957 bis 1980 Teil der Eidgenössischen Sternwarte der ETH Zürich)
Publisher: name: [s.n.]
Year: 2015

description: Bleistiftzeichnung mit schwarzer Farbe und Bleistift, erstellt als Projektionsbildzeichnung für die Beobachtungen in Locarno-Monti auf einem eigenen Vordruck. Instrument: Zeiss-Coudé-Refraktor mit 15 cm Öffnung und 225 cm Brennweite. Bildqualität (SIDC): 3.
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden auf dem Vordruck eingetragen. Zusätzlich sind zuhanden der späteren statistischen Verarbeitung die Angaben für die Bestimmung der Fleckenrelativzahl notiert.
Beobachtungstätigkeit unter eigenständiger Leitung (Associazione Specola Solare Ticinese ASST)
Outer Billiards and Tilings of the Hyperbolic Plane
Creators: name: Dogru, FIliz
name: Fischer, Emily
name: Munteanu, Cristian Mihai
Publisher: name: arXiv
Year: 2013
Subjects: subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics
subject: 37E15

description: In this paper we present new results regarding the periodicity of outer billiards in the hyperbolic plane around polygonal tables which are tiles in regular two-piece tilings of the hyperbolic plane.
description: 15 pages, 7 figures. The paper is presenting results obtained during the REU program Summer@ICERM Brown University 2013
Elliptic genera and real Jacobi forms
Creators: name: Ashok, Sujay K.
name: Troost, Jan
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We construct real Jacobi forms with matrix index using path integrals. The path integral expressions represent elliptic genera of two-dimensional N=(2,2) supersymmetric theories. They arise in a family labeled by two integers N and k which determine the central charge of the infrared fixed point through the formula c=3N(1+ 2N/k). We decompose the real Jacobi form into a mock modular form and a term arising from the continuous spectrum of the conformal field theory. We argue that the Jacobi form represents the elliptic genus of a theory defined on a 2N dimensional background with U(N) isometry, containing a complex projective space section, a circle fiber and a linear dilaton direction. We also present formulas for the elliptic genera of orbifolds of these models.
description: 32 pages
Sonnenfleckenzeichnung Nr. 271.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 18.12.2015, 09:15, erstellt von Sergio Cortesi
Creators: name: Observatorium Specola Solare Ticinese Locarno (1957 bis 1980 Teil der Eidgenössischen Sternwarte der ETH Zürich)
Publisher: name: [s.n.]
Year: 2015

description: Bleistiftzeichnung mit schwarzer Farbe und Bleistift, erstellt als Projektionsbildzeichnung für die Beobachtungen in Locarno-Monti auf einem eigenen Vordruck. Instrument: Zeiss-Coudé-Refraktor mit 15 cm Öffnung und 225 cm Brennweite. Bildqualität (SIDC): 3.
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden auf dem Vordruck eingetragen. Zusätzlich sind zuhanden der späteren statistischen Verarbeitung die Angaben für die Bestimmung der Fleckenrelativzahl notiert.
Beobachtungstätigkeit unter eigenständiger Leitung (Associazione Specola Solare Ticinese ASST)
Critical behavior of the contact process on small-world networks
Creators: name: Ferreira, Ronan S.
name: Ferreira, Silvio C.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Physics and Society (physics.soc-ph)
subject: FOS: Physical sciences

description: We investigate the role of clustering on the critical behavior of the contact process (CP) on small-world networks using the Watts-Strogatz (WS) network model with an edge rewiring probability p. The critical point is well predicted by a homogeneous cluster-approximation for the limit of vanishing clustering (p close to 1). The critical exponents and dimensionless moment ratios of the CP are in agreement with those predicted by the mean-field theory for any p > 0. This independence on the network clustering shows that the small-world property is a sufficient condition for the mean-field theory to correctly predict the universality of the model. Moreover, we compare the CP dynamics on WS networks with rewiring probability p = 1 and random regular networks and show that the weak heterogeneity of the WS network slightly changes the critical point but does not alter other critical quantities of the model.
description: 07 pages, 06 figures
Maximal bifix decoding
Creators: name: Berthé, Valérie
name: De Felice, Clelia
name: Dolce, Francesco
name: Leroy, and Julien
name: Perrin, Dominique
name: Reutenauer, Christophe
name: Rindone, Giuseppina
Publisher: name: arXiv
Year: 2013
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics

description: We introduce a class of sets of words which is a natural common generalization of Sturmian sets and of interval exchange sets. This class of sets consists of the uniformly recurrent tree sets, where the tree sets are defined by a condition on the possible extensions of bispecial factors. We prove that this class is closed under maximal bifix decoding. The proof uses the fact that the class is also closed under decoding with respect to return words.
description: arXiv admin note: text overlap with arXiv:1305.0127
Teachers’ Emotional Experiences during COVID-19: A Narrative Inquiry
Creators: Wells, Kendra L
Publisher: name: University of Alberta Library
Year: 2023

Teaching became harder during the pandemic. More specifically, elementary teachers were expected to monitor student health on top of teaching curriculum, they were required to find creative ways to maintain relationships with students, and they needed to coach parents on implementing daily lessons. Changes to the profession such as these are likely to bring up emotions in teachers. Indeed, teachers who taught virtually during the pandemic were more anxious than in-person teachers. Teachers also reported feeling uncertainty and emotional exhaustion during the pandemic. Therefore, the pandemic was clearly an emotional experience for some teachers. However, pandemic research to date has focused on emotion-adjacent outcomes such as efficacy or identity, or has a narrow scope of emotion data due to quantitative methodology. This omission led me to select an open-ended methodology, narrative inquiry, that allowed me to dive deep into teachers’ emotions and the experiences and context surrounding them. Precisely, I conducted a narrative inquiry to tell the stories of three Alberta elementary teachers' emotional experiences during the pandemic. In this thesis, I incorporated elements of Labov’s structural episodic analysis and Clandinin and Connelly’s restorying thereby creating an integrated analysis framework that allowed me to both deconstruct participants' narratives into their structural components and reconstruct them into restoried narratives as a process of meaning-making. I situate these findings in existing psychological literature and discuss methodological and practical implications.
Symptoms and Experiences of Chest Binding: A Cross-Sectional Survey Using a Patient Oriented, Harm Reduction Approach
Creators: Peters, Meaghan R
Publisher: name: University of Alberta Library
Year: 2023

Objective: People bind their chest to relieve gender dysphoria and most people that bind experience negative physical symptoms as a result. The purpose of the current research is to: 1) explore the incidence, overall impact, and level of concern of adverse symptoms related to chest binding, and 2) describe the experiences of chest binding-related symptoms that would be most likely seen by health care providers.

Methods: A cross-sectional, online, purpose-made survey was conducted using a patient engaged, harm reduction approach. The survey asked about binding history, symptom experiences, and demographics. Twenty-nine symptoms from seven physiological categories were included.

Results: 356 people responded to the survey, which represents 1.1% of the target population. Symptom incidence, overall impact, and level of concern were used to calculate an importance rating for each symptom. The symptoms rated as most important were shortness of breath, overheating, and chest pain. Back pain, chest pain, shoulder pain, shortness of breath, shoulder instability, and rib and spine changes are most likely to be seen by general care providers in relation to chest binding. The frequency and intensity of these symptoms was less when not binding but was still present and impacted social/recreational activities. Despite moderate frequency and intensity of these symptoms, participants rarely modified their binding habits.

Conclusion: Patterns of symptom presentation suggest underlying physiological changes from chest binding. Chest binding was important enough to participants to warrant enduring significant discomfort. Treatment should focus on symptom management and minimizing the physiological effects without suggesting or requiring modifications to binding behaviours. Treatment can include education on clinically concerning symptoms and screening for symptoms that are most important to patients.

Research Impact: We provide a novel and detailed exploration of chest binding related symptoms, especially focusing on symptom management. Findings give HCPs clear guidance on what to look for and how to address symptoms with patients who bind their chest.
Sonnenfleckenzeichnung Nr. 262.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 09.12.2015, 10:00, erstellt von Marco Cagnotti
Creators: name: Observatorium Specola Solare Ticinese Locarno (1957 bis 1980 Teil der Eidgenössischen Sternwarte der ETH Zürich)
Publisher: name: [s.n.]
Year: 2015

description: Bleistiftzeichnung mit schwarzer Farbe und Bleistift, erstellt als Projektionsbildzeichnung für die Beobachtungen in Locarno-Monti auf einem eigenen Vordruck. Instrument: Zeiss-Coudé-Refraktor mit 15 cm Öffnung und 225 cm Brennweite. Bildqualität (SIDC): 3.
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden auf dem Vordruck eingetragen. Zusätzlich sind zuhanden der späteren statistischen Verarbeitung die Angaben für die Bestimmung der Fleckenrelativzahl notiert.
Beobachtungstätigkeit unter eigenständiger Leitung (Associazione Specola Solare Ticinese ASST)
RESEARCH ON THE AMOUNT OF FIBROUS WASTES RELEASED INTO THE ATMOSPHERE
Creators: name: Karimov, Javlonbek
Publisher: name: Zenodo
Year: 2023

description: The rapid development of science and technology, the growth of industrial production and the increasing anthropogenic impact on the environment around us negatively affect its ability to self-govern. Therefore, protecting the environment, and therefore the health of current and future generations, is one of the most important issues.
Sonnenfleckenzeichnung Nr. 30.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 12.02.2015, 09:15, erstellt von Marco Cagnotti
Creators: name: Observatorium Specola Solare Ticinese Locarno (1957 bis 1980 Teil der Eidgenössischen Sternwarte der ETH Zürich)
Publisher: name: [s.n.]
Year: 2015

description: Bleistiftzeichnung mit schwarzer Farbe und Bleistift, erstellt als Projektionsbildzeichnung für die Beobachtungen in Locarno-Monti auf einem eigenen Vordruck. Instrument: Zeiss-Coudé-Refraktor mit 15 cm Öffnung und 225 cm Brennweite. Bildqualität (SIDC): 4.
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden auf dem Vordruck eingetragen. Zusätzlich sind zuhanden der späteren statistischen Verarbeitung die Angaben für die Bestimmung der Fleckenrelativzahl notiert.
Beobachtungstätigkeit unter eigenständiger Leitung (Associazione Specola Solare Ticinese ASST)
Gravitational Collapse of a Homogeneous Scalar Field in Deformed Phase Space
Creators: name: Rasouli, S. M. M.
name: Ziaie, A. H.
name: Marto, J.
name: Moniz, P. V.
Publisher: name: arXiv
Year: 2013
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We study the gravitational collapse of a homogeneous scalar field, minimally coupled to gravity, in the presence of a particular type of dynamical deformation between the canonical momenta of the scale factor and of the scalar field. In the absence of such a deformation, a class of solutions can be found in the literature [R. Goswami and P. S. Joshi, arXiv:gr-qc/0410144], %\cite{JG04}, whereby a curvature singularity occurs at the collapse end state, which can be either hidden behind a horizon or be visible to external observers. However, when the phase-space is deformed, as implemented herein this paper, we find that the singularity may be either removed or instead, attained faster. More precisely, for negative values of the deformation parameter, we identify the emergence of a negative pressure term, which slows down the collapse so that the singularity is replaced with a bounce. In this respect, the formation of a dynamical horizon can be avoided depending on the suitable choice of the boundary surface of the star. Whereas for positive values, the pressure that originates from the deformation effects assists the collapse toward the singularity formation. In this case, since the collapse speed is unbounded, the condition on the horizon formation is always satisfied and furthermore the dynamical horizon develops earlier than when the phase-space deformations are absent. These results are obtained by means of a thoroughly numerical discussion.
description: 17 pages, 17 figures
Demographic changes in a large motor neuron disease cohort in Portugal: a 27 year experience
Creators: name: Alves, Inês
name: Gromicho, Marta
name: Santos, Miguel Oliveira
name: Pinto, Susana
name: Pronto-Laborinho, Ana
name: Swash, Michael
name: de Carvalho, Mamede
Publisher: name: Taylor & Francis
Year: 2023
Subjects: subject: Medicine
subject: Cell Biology
subject: Neuroscience
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: 110309 Infectious Diseases
subject: FOS: Health sciences

description: Objective: Motor Neuron Diseases (MND) have a large clinical spectrum, being the most common amyotrophic lateral sclerosis (ALS) but there is significant clinical heterogeneity. Our goal was to investigate this heterogeneity and any potential changes during a long period. Methods: We performed a retrospective cohort study among a large Portuguese cohort of MND patients (n = 1550) and investigated changing patterns in clinical and demographic characteristics over the 27-year period of our database. With that aim, patients were divided into three 9-year groups according to the date of their first visit to our unit: P1, 1994–2002; P2, 2003–2011; P3, 2012–2020. Results: The overall cohort’s clinical and demographic characteristics are consistent with clinical experience, but our findings point to gradual changes over time. Time pattern analysis revealed statistically significant differences in the distribution of clinical phenotypes, the average age of onset, diagnostic delay, the proportin of patients using respiratory support with noninvasive ventilation (NIV), time to NIV, and survival. Across time, in the overall cohort, we found an increasing age at onset (p = 0.029), a decrease of two months in diagnostic delay (p < 0.001) and a higher relative frequency of progressive muscular atrophy patients. For ALS patients with spinal onset, from P1 to P2, there was a more widespread (54.8% vs 69.4%, p = 0.005) and earlier (36.9 vs 27.2 months, p = 0.05) use of NIV and a noteworthy 13-month increase in median survival (p = 0.041). Conclusions: Our results probably reflect better comprehensive care, and they are relevant for future studies exploring the impact of new treatments on ALS patients.
Star Formation Quenching in High-redshift Large-scale Structure: Post-starburst Galaxies in the Cl1604 Supercluster at $z \sim 0.9$
Creators: name: Wu, Po-Feng
name: Gal, Roy R.
name: Lemaux, Brian C.
name: Kocevski, Dale D.
name: Lubin, Lori M.
name: Rumbaugh, Nicholas
name: Squires, Gordon K.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: The Cl1604 supercluster at $z \sim 0.9$ is one of the most extensively studied high redshift large scale structures, with more than 500 spectroscopically confirmed members. It consists of 8 clusters and groups, with members numbering from a dozen to nearly a hundred, providing a broad range of environments for investigating the large scale environmental effects on galaxy evolution. Here we examine the properties of 48 post-starburst galaxies in Cl1604, comparing them to other galaxy populations in the same supercluster. Incorporating photometry from ground-based optical and near-infrared imaging, along with $Spitzer$ mid-infrared observations, we derive stellar masses for all Cl1604 members. The colors and stellar masses of the K+A galaxies support the idea that they are progenitors of red sequence galaxies. Their morphologies, residual star-formation rates, and spatial distributions suggest galaxy mergers may be the principal mechanism producing post-starburst galaxies. Interaction between galaxies and the dense intra-cluster medium is also effective, but only in the cores of dynamically evolved clusters. The prevalence of post-starburst galaxies in clusters correlates with the dynamical state of the host cluster, as both galaxy mergers and the dense intra-cluster medium produce post-starburst galaxies. We also investigate the incompleteness and contamination of K+A samples selected by means of H$δ$ and [OII] equivalent widths. K+A samples may be up to $\sim50\%$ incomplete due to the presence of LINER/Seyferts and up to $\sim30\%$ of K+A galaxies could have substantial star formation activity.
description: 19 pages, 13 figures, accepted by ApJ
Application of Propensity Score Adjustment to Reduce the Survivorship Bias  in Assessing Neurocognitive and Functional Outcomes of Children after Early  Cardiac Surgery for Congenital Heart Disease
Creators: Amiri, Sara
Publisher: name: University of Alberta Library
Year: 2023

Adjusting for survivorship bias for neurocognitive and functional outcome using propensity score and k-means clustering methodDescriptionIn recent years, the number of congenital heart disease survivors has increased with cardiac detection and surgery and perioperative care improvements. However, some survivors may experience poor neurocognitive and functional outcomes after complex cardiac surgery.It could be related to underestimating survivor outcomes due to a lack of practical statistical methods. We proposed an analytical approach to adjust for the severity of illness, using pre-operative and intra-operative differences among children to develop a propensity score and k-means clustering.The propensity score and k-means clustering were used to assess the impact of the severity of illness confounders and compare them with crude results.The analysis included n=235 children with single ventricle congenital heart disease registered at age ≤ 6 weeks in the Western Canadian Complex Pediatric Therapies Follow-up Program between 1997 and 2016.Preoperative, intraoperative, and postoperative variables were collected. The severity of illness propensity score was calculated based on selected variables. Then, a logistic regression model was set up accordingly. Neurocognitive and functional outcomes’ linear time trends showed that 4.5 years after surgery, FSIQ scores stayed the same, VMI scores increased, and ABAS scores decreased over time in high-risk children.Using propensity score adjustment helps clarify the actual trend of neurocognitive and functional outcomes in babies with complex conditions.
Sonnenfleckenzeichnung Nr. 280.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 30.12.2015, 09:30, erstellt von Marco Cagnotti
Creators: name: Observatorium Specola Solare Ticinese Locarno (1957 bis 1980 Teil der Eidgenössischen Sternwarte der ETH Zürich)
Publisher: name: [s.n.]
Year: 2015

description: Bleistiftzeichnung mit schwarzer Farbe und Bleistift, erstellt als Projektionsbildzeichnung für die Beobachtungen in Locarno-Monti auf einem eigenen Vordruck. Instrument: Zeiss-Coudé-Refraktor mit 15 cm Öffnung und 225 cm Brennweite. Bildqualität (SIDC): 3.
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden auf dem Vordruck eingetragen. Zusätzlich sind zuhanden der späteren statistischen Verarbeitung die Angaben für die Bestimmung der Fleckenrelativzahl notiert.
Beobachtungstätigkeit unter eigenständiger Leitung (Associazione Specola Solare Ticinese ASST)
Towards More Efficient and Economical Phosphorus and Bioenergy Recovery from Source-Diverted Blackwater
Creators: Sun, Huijuan
Publisher: name: University of Alberta Library
Year: 2023

Decentralized source-diverted blackwater resource recovery represents an attractive wastewater management approach. Source-diverted blackwater refers to toilet wastewater, with or without kitchen wastewater, containing over half of the domestic biochemical oxygen demand (BOD) load and over 90% of PO4-P and NH4-N contents. Blackwater has strong buffering capacity as a result of high alkalinity and high pH close to 9. Without the addition of waste streams collected from laundry, washing, showering, and other household wastewaters (i.e., grey water), source-diverted blackwater, especially concentrated blackwater collected from low-flush vacuum toilet systems, is ideal for nutrient and energy recovery. In particular, phosphorus (P) recovery from blackwater helps relieve the dependence on phosphate rock reserves, which is becoming crucial for sustainable waste management in the context of both environment protection and future availability of P. Biogas recovery from blackwater represents a source of renewable energy, which helps increase energy security, reduce the reliance on non-renewable energy, and reduce greenhouse gas emission from non-renewable energy utilization.

This thesis aims to evaluate, develop, and optimize biological and chemical processes to achieve enhanced P and biomethane recovery from source-diverted blackwater. Specifically, this thesis focuses on three aspects: (i) assessing and developing cost-effective and efficient P recovery from raw blackwater without chemical addition, (ii) evaluating and modelling the role of bioreactor microbiome on biomethane recovery from blackwater; and (iii) developing and optimizing bioreactors for simultaneous P and biomethane recovery from blackwater.

This thesis successfully demonstrated the feasibility of P recovery through high-quality struvite precipitation from raw concentrated blackwater, which achieved >90% P recovery without any alkali addition. Operational conditions for blackwater biomethane recovery from upflow anaerobic sludge blanket (UASB) reactors were optimized, and the importance of low-abundance microorganisms in UASB reactors was demonstrated. Lastly, simultaneous P and biomethane recovery from source-diverted blackwater was demonstrated, and the mechanisms involved in P precipitation in bioreactors were clarified. Overall, this research developed and optimized blackwater P and biomethane recovery technologies and contributed to the development of more sustainable resource recovery-based wastewater management.
Sonnenfleckenzeichnung Nr. 185.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 30.08.2015, 10:30, erstellt von Andrea Manna
Creators: name: Observatorium Specola Solare Ticinese Locarno (1957 bis 1980 Teil der Eidgenössischen Sternwarte der ETH Zürich)
Publisher: name: [s.n.]
Year: 2015

description: Bleistiftzeichnung mit schwarzer Farbe und Bleistift, erstellt als Projektionsbildzeichnung für die Beobachtungen in Locarno-Monti auf einem eigenen Vordruck. Instrument: Zeiss-Coudé-Refraktor mit 15 cm Öffnung und 225 cm Brennweite. Bildqualität (SIDC): 3.
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden auf dem Vordruck eingetragen. Zusätzlich sind zuhanden der späteren statistischen Verarbeitung die Angaben für die Bestimmung der Fleckenrelativzahl notiert.
Beobachtungstätigkeit unter eigenständiger Leitung (Associazione Specola Solare Ticinese ASST)
Integrated System Design for Intelligent Subterranean Exploration using Experimental UAVs
Creators: Allan, Shane
Publisher: name: University of Alberta Library
Year: 2023

Unique challenges arise when attempting to navigate unknown GPS-denied subterranean environments. To successfully explore these environments a vehicle much be able to reconcile the nonlinear dynamics of motion, accommodate for diverse terrain, adjust to static and moving obstacles, combat degraded sensor conditions, and transmit high quality information. Each of these fields have been investigated independently, however within the scope of this research these challenges are addressed collectively by a prototype unmanned aerial vehicle (UAV) which utilizes a sophisticated motion planner, customized hardware, and artificial intelligence-based image enhancement.

A motion planner suitable for the described challenges addresses a four-part problem. Generation of a high-fidelity map, exploratory motivation, a global navigational strategy, and an optimized and adaptable local trajectory planner. Each of these sub-tasks are addressed by implementing the Fast Autonomous UAV Exploration (FUEL) algorithm into the prototype platform.

Limitations to hardware systems present unique boundaries to efficient flight performance. Consumers typically address these issues through costly performance up- grades of existing components. However, when the flight terrain is predetermined, slight geometric modifications to the airframe can be implemented to optimize efficiency. Within this research, the vehicle uses custom-designed twisted rotor arms. This strategy is used to redirect a portion of the vertical thrust to produce greater yaw authority.

Arguably, the main value of a UAV is measured by the information it transmits to remote operators. Motivated by this, five convolutional neural networks tasked with enhancing degraded low light images are implemented onboard the vehicle. Each of these networks are tested in real-time experiments to quantify their performance and their net benefits to the operator.

The ultimate goal of this research is to experimentally validate all presented design selections, specifically to understand the limitations and real-world performance of the systems and algorithms used.
DASS: Dynamic Adaptive Sub-Target Specialization
Creators: Gobran, Tyler
Publisher: name: University of Alberta Library
Year: 2023

A new microprocessor within a given processor architecture may introduce performance-improving features that either can only be accessed through novel instructions or require new code-generation techniques to be beneficial. In response, compilers must be extended/improved to make use of these new instructions and to generate better schedules for the new hardware. The compiler improvements that enable these specializations can take significant time to develop, thus applications compiled Ahead-Of-Time (AOT) will often

not benefit from code specialization without later recompilation. Furthermore, code compiled for a specific hardware sub-target lacks performance portability, thus, for better performance, there is a need to maintain multiple builds for each processor architecture leading to significant development and maintenance costs. This thesis provides an overview of existing sub-target specialization methods and demonstrates that challenges to existing methods can be overcome by applying code specialization only to a small percentage of the code in a program. Moreover, it proposes DASS, a novel Dynamic Adaptive Sub-Target Specialization technique to recompile selected parts of a program at runtime. Empirical evidence indicates that selective specialization can achieve up to 93% of whole-program specialization speedup by statically specializing less than 1.5% of the application code. Furthermore, DASS can dynamically achieve performance close to that of static specialization, reaching up to 83% of statically attainable speedup while performing recompilation and redirection during execution.
Sonnenfleckenzeichnung Nr. 9.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 09.01.2015, 09:15, erstellt von Marco Cagnotti
Creators: name: Observatorium Specola Solare Ticinese Locarno (1957 bis 1980 Teil der Eidgenössischen Sternwarte der ETH Zürich)
Publisher: name: [s.n.]
Year: 2015

description: Bleistiftzeichnung mit schwarzer Farbe und Bleistift, erstellt als Projektionsbildzeichnung für die Beobachtungen in Locarno-Monti auf einem eigenen Vordruck. Instrument: Zeiss-Coudé-Refraktor mit 15 cm Öffnung und 225 cm Brennweite. Bildqualität (SIDC): 3.
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden auf dem Vordruck eingetragen. Zusätzlich sind zuhanden der späteren statistischen Verarbeitung die Angaben für die Bestimmung der Fleckenrelativzahl notiert.
Beobachtungstätigkeit unter eigenständiger Leitung (Associazione Specola Solare Ticinese ASST)
Generation of rising-tone chorus in a two-dimensional mirror field by using the general curvilinear PIC code
Creators: name: Ke, Yangguang
name: Gao, Xinliang
name: Lu, Quanming
name: Wang, Xueyi
name: Wang, Shui
Publisher: name: American Geophysical Union
Year: 2017
Subjects: whistler-mode waves
radiation-belt electrons
storm-time chorus
VLF emissions
magnetospheric chorus
resonant diffusion

description: Recently, the generation of rising-tone chorus has been implemented with one-dimensional (1-D) particle-in-cell (PIC) simulations in an inhomogeneous background magnetic field, where both the propagation of waves and motion of electrons are simply forced to be parallel to the background magnetic field. In this paper, we have developed a two-dimensional (2-D) general curvilinear PIC simulation code and successfully reproduced rising-tone chorus waves excited from an anisotropic electron distribution in a 2-D mirror field. Our simulation results show that whistler waves are mainly generated around the magnetic equator and continuously gain growth during their propagation toward higher-latitude regions. The rising-tone chorus waves are observed off the magnetic equator, which propagate quasi-parallel to the background magnetic field with the wave normal angle smaller than 25 degrees. Due to the propagating effect, the wave normal angle of chorus waves is increasing during their propagation toward higher-latitude regions along an enough curved field line. The chirping rate of chorus waves is found to be larger along a field line with a smaller curvature.