cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
title: Inventarisation. Zur Feststellung von Kulturdenkmalen
Creators: name: Osteneck, Volker
Publisher: name: University Library Heidelberg
Year: 2014

description: Denkmalpflege in Baden-Württemberg – Nachrichtenblatt der Landesdenkmalpflege, Bd. 14, Nr. 1 (1985), Beginn und Erscheinungsfrequenz: Ausgaben pro Band: 4
Targeted Search Control in AlphaZero for Effective Policy Improvement
Creators: Trudeau, Alexandre
Publisher: name: University of Alberta Library
Year: 2023

AlphaZero is a self-play reinforcement learning algorithm that achieves superhuman play in the games of chess, shogi, and Go via policy iteration. To be an effective policy improvement operator, AlphaZero’s search needs to have accurate value estimates for the states that appear in its search tree. The accuracy of AlphaZero's value function depends upon the distribution of states encountered and trained upon. AlphaZero begins its self-play training matches from the initial state of a game and only samples actions over the first few moves, limiting its exploration of states deeper in the game tree. In this thesis, I introduce Go-Exploit, a novel search control strategy for AlphaZero. Go-Exploit samples the start state of its self-play trajectories from an archive of states of interest. Beginning self-play trajectories from states throughout the game tree enables Go-Exploit to more effectively explore the game tree and to learn a value function that generalizes better. Producing shorter self-play trajectories allows Go-Exploit to train upon more independent value targets, further improving value training. Finally, the exploration inherent in Go-Exploit reduces its need for exploratory actions, enabling it to train under more exploitative policies. In the games of Connect Four and 9x9 Go, I show that Go-Exploit learns with a greater sample efficiency than standard AlphaZero, resulting in stronger performance against reference opponents and in head-to-head play. I also compare Go-Exploit to KataGo, a more sample efficient reimplementation of AlphaZero, and show that Go-Exploit’s search control strategy exhibits a greater sample efficiency than KataGo’s. Furthermore, Go-Exploit’s sample efficiency improves when KataGo’s other innovations are incorporated.
Computing one-loop radiative corrections in $τ\to π(K) ν[γ]$ and testing new physics
Creators: name: Rosell, Ignasi
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Without a doubt the ratios $R_{τ/ P}\equiv Γ\left( τ\to P ν_τ[γ] \right) / Γ\left(P\to μν_μ[γ]\right)$ ($P=π,K$) give a convenient scenario to test the lepton universality, the CKM unitarity and to search for non-standard interactions in $τ$ decays. Moreover, the previous theoretical estimation of these observables is more than twenty-five years old and some assumptions of that estimation are unrealistic. Therefore, an update of $R_{τ/ P}$ was timely. The one-loop radiative corrections have been computed by considering an expansion of Chiral Perturbation Theory including the lightest spin-one resonances and respecting the short-distance behavior dictated by QCD. We have reported $δR_{τ/π}=(0.18\pm 0.57 )\%$ and $δR_{τ/K}=(0.97\pm 0.58 )\%$, where the uncertainties have been induced fundamentally by the estimation of the counterterms. We have tested the lepton universality, the CKM unitarity and have searched for new physics in $τ$ decays. As a by-product, we have also determined the theoretical radiative corrections to the $τ\to P ν_τ[γ]$ decay rates, $δ_{τπ} = -(0.24 \pm 0.56) \%$ and $δ_{τK} = -(0.15 \pm 0.57) \%$
description: Talk given at the 10th International Workshop on QCD: Theory and Experiment (QCD@work 2022), 27-30 June (2022), Lecce (Italy). 7 pages, 2 tables
title: Restaurierung: Eine Frage der Konzeption. Zur Restaurierungspraxis und ihren Maßgaben
Creators: name: Grunsky, Eberhard
Publisher: name: University Library Heidelberg
Year: 2014

description: Denkmalpflege in Baden-Württemberg – Nachrichtenblatt der Landesdenkmalpflege, Bd. 14, Nr. 1 (1985), Beginn und Erscheinungsfrequenz: Ausgaben pro Band: 4
Estimating the mass of the hidden charm $1^+(1^{+})$ tetraquark state via QCD sum rules
Creators: name: Qiao, Cong-Feng
name: Tang, Liang
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: By using QCD sum rules, the mass of the hidden charm tetraquark $[cu][\bar{c}\bar{d}]$ state with $I^{G} (J^{P}) = 1^+ (1^{+})$ (HCTV) is estimated, which presumably will turn out to be the newly observed charmonium-like resonance $Z_c^+(3900)$. In the calculation, contributions up to dimension eight in the operator product expansion(OPE) are taken into account. We find $m_{1^+}^c = (3912^{+306}_{-153}) \, \text{MeV}$, which is consistent, within the errors, with the experimental observation of $Z_c^+(3900)$. Extending to the b-quark sector, $m_{1^+}^b = (10561^{+395}_{-163}) \,\text{MeV}$ is obtained. The calculational result strongly supports the tetraquark picture for the "exotic" states of $Z_c^+(3900)$ and $Z_b^+(10610)$.
description: 13 pages,3 figures, 1 table, version to appear in EPJC
title: Veröffentlichungen des Landesdenkmalamtes
Creators: name: Redaktion, Die
Publisher: name: University Library Heidelberg
Year: 2014

description: Denkmalpflege in Baden-Württemberg – Nachrichtenblatt der Landesdenkmalpflege, Bd. 14, Nr. 1 (1985), Beginn und Erscheinungsfrequenz: Ausgaben pro Band: 4
title: Veröffentlichungen des Landesdenkmalamtes
Creators: name: Redaktion, Die
Publisher: name: University Library Heidelberg
Year: 2014

description: Denkmalpflege in Baden-Württemberg – Nachrichtenblatt der Landesdenkmalpflege, Bd. 15, Nr. 2 (1986), Beginn und Erscheinungsfrequenz: Ausgaben pro Band: 4
Cycle-maximal triangle-free graphs
Creators: name: Durocher, Stephane
name: Gunderson, David S.
name: Li, Pak Ching
name: Skala, Matthew
Publisher: name: arXiv
Year: 2013
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 05C38, 05C35

description: We conjecture that the balanced complete bipartite graph $K_{\lfloor n/2 \rfloor,\lceil n/2 \rceil}$ contains more cycles than any other $n$-vertex triangle-free graph, and we make some progress toward proving this. We give equivalent conditions for cycle-maximal triangle-free graphs; show bounds on the numbers of cycles in graphs depending on numbers of vertices and edges, girth, and homomorphisms to small fixed graphs; and use the bounds to show that among regular graphs, the conjecture holds. We also consider graphs that are close to being regular, with the minimum and maximum degrees differing by at most a positive integer $k$. For $k=1$, we show that any such counterexamples have $n\le 91$ and are not homomorphic to $C_5$; and for any fixed $k$ there exists a finite upper bound on the number of vertices in a counterexample. Finally, we describe an algorithm for efficiently computing the matrix permanent (a #P-complete problem in general) in a special case used by our bounds.
description: 32 pages, 6 figures, authors' accepted manuscript; corrections to integer-sequence lemma
title: Ansprache
Creators: name: Schlee, Dietmar
Publisher: name: University Library Heidelberg
Year: 2014

description: Denkmalpflege in Baden-Württemberg – Nachrichtenblatt der Landesdenkmalpflege, Bd. 16, Nr. 1 (1987), Beginn und Erscheinungsfrequenz: Ausgaben pro Band: 4
Approximation Schemas for the Min Sum k-Clustering Problem
Creators: Naderi Beni, Ismail
Publisher: name: University of Alberta Library
Year: 2023

In this thesis, we present Approximation Schemes for the Min Sum k Clustering problem on a number of classes of graph metrics. In Min Sum k Clustering problem introduced by Sahni and Gonzalez [22] in 1976, given a graph G(V, E) with metric edge costs and parameter k, we are asked to partition V (i.e. assume all V must be clustered) into clusters C1, C2, · · · , Ck such that the sum of pairwise distances of points in the same cluster is minimized. This is a generalization of k-median clustering with avoiding unbalanced cluster sizes. The best known algorithm for Min Sum k Clustering by Behsaz, Friggstad, Salavatipour and Sivakumar [6] on metric spaces is an O(log n) approximation algorithm. Even for the case of trees, the best approximation factor given by the same authors is 2 + ε . Cohen-Addad, Karthik, and Lee [11] proved that min sum k clustering is APX-Hard on Metric spaces, i.e. there isn’t any PTAS unless P=NP. In this work, we will make an improvement on this problem by presenting the first Quasi Polynomial Time Approximation Schemes for several graph metrics: graphs of bounded treewidth, graphs of bounded highway dimension, and graphs of bounded doubling dimensions.
title: Mitteilungen
Creators: name: Redaktion, Die
Publisher: name: University Library Heidelberg
Year: 2014

description: Denkmalpflege in Baden-Württemberg – Nachrichtenblatt der Landesdenkmalpflege, Bd. 16, Nr. 2 (1987), Beginn und Erscheinungsfrequenz: Ausgaben pro Band: 4
title: Die Dienststellen des Landesdenkmalamtes
Creators: name: Redaktion, Die
Publisher: name: University Library Heidelberg
Year: 2014

description: Denkmalpflege in Baden-Württemberg – Nachrichtenblatt der Landesdenkmalpflege, Bd. 16, Nr. 2 (1987), Beginn und Erscheinungsfrequenz: Ausgaben pro Band: 4
The Active Chromospheres of Lithium-Rich Red Giant Stars
Creators: name: Sneden, Christopher
name: Afsar, Melike
name: Bozkurt, Zeynep
name: Adamow, Monika
name: Mallick, Anohita
name: Reddy, Bacham E.
name: Janowiecki, Steven
name: Mahadevan, Suvrath
name: Bowler, Brendan P.
name: Hawkins, Keith
name: Lind, Karin
name: Dupree, Andrea K.
name: Ninan, Joe P.
name: Nagarajan, Neel
name: Topcu, Gamze Bocek
name: Froning, Cynthia S.
name: Bender, Chad F.
name: Terrien, Ryan
name: Ramsey, Lawrence W.
name: Mace, Gregory N.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We have gathered near-infrared $zyJ$-band high resolution spectra of nearly 300 field red giant stars with known lithium abundances in order to survey their \species{He}{i} $λ$10830 absorption strengths. This transition is an indicator of chromospheric activity and/or mass loss in red giants. The majority of stars in our sample reside in the red clump or red horizontal branch based on their $V-J,M_V$ color-magnitude diagram and their Gaia \teff, \logg\ values. Most of our target stars are Li-poor in the sense of having normally low Li abundances, defined here as \eps{Li}~$<$~1.25. Over 90\% of these Li-poor stars have weak $λ$10830 features. But more than half of the 83 Li-rich stars (\eps{Li}~$>$~1.25) have strong $λ$10830 absorptions. These large $λ$10830 lines signal excess chromospheric activity in Li-rich stars; there is almost no indication of significant mass loss. The Li-rich giants also may have a higher binary fraction than do Li-poor stars, based on their astrometric data. It appears likely that both residence on the horizontal branch and present or past binary interaction play roles in the significant Li-He connection established in this survey.
description: Astrophysical Journal, in press
ELECTROCHROMISM FOR LINEAR AND NONLINEAR NANOPLASMONIC AND DIELECTRIC NANOPHOTONIC DEVICES
Creators: Hopmann, Eric
Publisher: name: University of Alberta Library
Year: 2023

The electrochromic (EC) effect has attracted constant research efforts since it was first described in the early 19th century. Conventionally, EC oxides (e.g., WO3, MoO3, V2O5, and NiO) are employed to modulate light transmittance in smart windows, which allow for up to 80% optical transmission modulation in several seconds. Recently, research in EC materials, in particular the optical properties of EC oxides, has led to novel functionalities transcending beyond their typical applications in smart windows. In a typical EC device light transmittance control is realized upon reversible ion intercalation, wherein resulting in modifying the real and imaginary parts of the refractive index. Dynamically altering the dielectric properties of an EC material gives direct control over the properties of nanophotonic devices. Furthermore, merging nanoplasmonics and nanophotonics with EC materials provides an additional degree of freedom and a new avenue to active control. Such an intriguing platform offers novel functionalities, such as dynamic high optical transmission modulation, structural color generation, and metasurface tunability at a low power consumption.

This thesis investigates the possibilities of integrating electrochromic WO3 into nanophotonic and nanoplasmonic devices. First, long lifetime ionic conductors are evaluated for use in EC devices. Common ion conductors are liquids or polymers, as well as amorphous crystals, which contain ionic species such as H+ or Li+. Here, a polymeric poly acrylamide ion conductor is modified via simple chemical methods to increase its lifetime. Further, solid-state LiNbO3 processing for ionic conduction is investigated and tailored as potential solid-state ion source in nanofabricated devices. Second, these ion conductors are integrated in plasmonic, electrochromic (i.e., plasmochromic) color and optical transmission modulation devices, for full color plasmonic display applications and ultra-high optical transmission modulation. Last, WO3 is utilized in combination with a plasma-enhanced chemical vapor deposition (PECVD) Silicon Nitride waveguide platform to create novel functionalities, such as ultra-high transmission modulation sensor applications and dynamic phase tuning. Through the EC modulation layer, we create a novel nonlinear photonic structure with the ability to dynamically and reversibly tune the second harmonic wavelength generated in a SiNx waveguide.
Quantization of unstable linear scalar fields in static spacetimes
Creators: name: Lima, William C. C.
Publisher: name: arXiv
Year: 2013
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We discuss the quantization of an unstable field through the construction of a "one-particle Hilbert space." The system considered here is a neutral scalar field evolving over a globally hyperbolic static spacetime and subject to a stationary external scalar potential. In order to prove our results we assume spacetimes without horizons and that the theory possess a "mass gap." Our strategy consists in building a complex structure, which arises from a suitable positive bilinear form defined over the space of classical solutions of the field equation. Once the space of states of the quantum field has been set, it is possible to study the effect of the time translation symmetry on it. From the time translation operator we obtain an expression for the Hamiltonian operator associated with the unstable sector of the field. This last result coincides with findings from long ago showing that the unstable degrees of freedom of the field behave as non-relativistic particles in a parabolic potential barrier.
description: 14 pages. Rectification of the statement at the end of the Sec. III B of the published version. All other results unchanged
Ecotones and LiDAR in tropical dry forests
Creators: Duan, Menglei
Publisher: name: University of Alberta Library
Year: 2023

Secondary succession is defined as natural regeneration following complete forest clearance from anthropogenic or natural disturbances. Traditional strategies aimed to map and characterize secondary succession using remote sensing are usually based on deterministic approaches, where transitions between successional stages are not considered. These transitions represent rich environments between successional stages and play a key role in ecosystem regeneration. Here, we evaluate the use of the Full-waveform Airborne LiDAR to characterize changes in forest structure between the transition of early-to-intermediate and intermediate-to-late forest succession at the Santa Rosa National Park Environmental Monitoring Super Site (SRNP-EMSS),

Guanacaste, Costa Rica. The vertical forest structure was analyzed on twenty cross-sections selected between forest transitions previously mapped using machine learning; leaf area density (LAD) and waveform metrics were studied based on the waveform profile derived from twenty-seven plots distributed in different successional forest patches. Results suggest that LiDAR techniques can identify forest structure differences between successional stages and their transitions. The significance proves that transitions exist, highlights the unique transitional characteristics between intermediate and late successional stages and contributes to understanding the

significance of inter-successional stages (transitions) in secondary dry forests.
The dust sublimation region of the Type 1 AGN NGC4151 at a hundred micro-arcsecond scale as resolved by the CHARA Array interferometer
Creators: name: Kishimoto, Makoto
name: Anderson, Matt
name: Brummelaar, Theo ten
name: Farrington, Christopher
name: Antonucci, Robert
name: Hoenig, Sebastian
name: Millour, Florentin
name: Tristram, Konrad
name: Weigelt, Gerd
name: Sturmann, Laszlo
name: Sturmann, Judit
name: Schaefer, Gail
name: Scott, Nic
Publisher: name: arXiv
Year: 2022
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The nuclear region of Type 1 AGNs has only been partially resolved so far in the near-infrared (IR) where we expect to see the dust sublimation region and the nucleus directly without obscuration. Here we present the near-IR interferometric observation of the brightest Type 1 AGN NGC4151 at long baselines of ~250 m using the CHARA Array, reaching structures at hundred micro-arcsecond scales. The squared visibilities decrease down to as low as ~0.25, definitely showing that the structure is resolved. Furthermore, combining with the previous visibility measurements at shorter baselines but at different position angles, we show that the structure is elongated *perpendicular* to the polar axis of the nucleus, as defined by optical polarization and a linear radio jet. A thin-ring fit gives a minor/major axis ratio of ~0.7 at a radius ~0.5 mas (~0.03 pc). This is consistent with the case where the sublimating dust grains are distributed preferentially in an equatorial plane in a ring-like geometry, viewed at an inclination angle of ~40 deg. Recent mid-IR interferometric finding of polar-elongated geometry at a pc scale, together with a larger-scale polar outflow as spectrally resolved by the HST, would generally suggest a dusty, conical and hollow outflow being launched presumably in the dust sublimation region. This might potentially lead to a polar-elongated morphology in the near-IR, as opposed to the results here. We discuss a possible scenario where an episodic, one-off anisotropic acceleration formed a polar-fast and equatorially-slow velocity distribution, having lead to an effectively flaring geometry as we observe.
description: Accepted for publication in ApJ
title: Die Heizanlage unter dem Parlatorium im Kloster Bebenhausen
Creators: name: Scholkmann, Barbara
Publisher: name: University Library Heidelberg
Year: 2014

description: Denkmalpflege in Baden-Württemberg – Nachrichtenblatt der Landesdenkmalpflege, Bd. 17, Nr. 4 (1988), Beginn und Erscheinungsfrequenz: Ausgaben pro Band: 4
Matrix group structure and Markov invariants in the strand symmetric phylogenetic substitution model
Creators: name: Jarvis, Peter D
name: Sumner, Jeremy G
Publisher: name: arXiv
Year: 2013
Subjects: subject: Populations and Evolution (q-bio.PE)
subject: Representation Theory (math.RT)
subject: Statistics Theory (math.ST)
subject: Quantitative Methods (q-bio.QM)
subject: FOS: Biological sciences
subject: FOS: Mathematics

description: We consider the continuous-time presentation of the strand symmetric phylogenetic substitution model (in which rate parameters are unchanged under nucleotide permutations given by Watson-Crick base conjugation). Algebraic analysis of the model's underlying structure as a matrix group leads to a change of basis where the rate generator matrix is given by a two-part block decomposition. We apply representation theoretic techniques and, for any (fixed) number of phylogenetic taxa $L$ and polynomial degree $D$ of interest, provide the means to classify and enumerate the associated Markov invariants. In particular, in the quadratic and cubic cases we prove there are precisely 1/3$(3^L+(-1)^L)$ and $6^{L-1}$ linearly independent Markov invariants, respectively. Additionally, we give the explicit polynomial forms of the Markov invariants for (i) the quadratic case with any number of taxa $L$, and (ii) the cubic case in the special case of a three-taxa phylogenetic tree. We close by showing our results are of practical interest since the quadratic Markov invariants provide independent estimates of phylogenetic distances based on (i) substitution rates within Watson-Crick conjugate pairs, and (ii) substitution rates across conjugate base pairs.
description: v2: Major revision now includes explicit forms for quadratic and cubic Markov invariants
title: Berghülen - Asch - Sonderbuch. Zur Entstehung einer archäologischen Fundlandschaft auf der Blaubeurer Alb
Creators: name: Kreutle, Rainer
Publisher: name: University Library Heidelberg
Year: 2014

description: Denkmalpflege in Baden-Württemberg – Nachrichtenblatt der Landesdenkmalpflege, Bd. 17, Nr. 4 (1988), Beginn und Erscheinungsfrequenz: Ausgaben pro Band: 4
title: Personalia
Creators: name: Redaktion, Die
Publisher: name: University Library Heidelberg
Year: 2014

description: Denkmalpflege in Baden-Württemberg – Nachrichtenblatt der Landesdenkmalpflege, Bd. 17, Nr. 4 (1988), Beginn und Erscheinungsfrequenz: Ausgaben pro Band: 4
Searching for $ X_{0}(2900) $ and $ X_{1}(2900) $ through the kaon induced reactions
Creators: name: Lin, Qing-Yong
name: Wang, Xiao-Yun
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: The productions of the exotic states $ X_0(2900) $ and $ X_1(2900) $ in $K^{+}p \to Σ_{c}^{++}X_{0}(2900)$ and $K^{+}p \to Σ_{c}^{++}X_{1}(2900)$ reactions are studied within an effective Lagrangian approach. The $t-$channel Born term is included to calculate the production cross sections. The numerical results show that the total cross section may reach up to about 0.5 nb and 25 nb for the production of $ X_0(2900) $ and $ X_1(2900) $, respectively. The predicted differential cross sections are sensitive to the scattering angles and have strong forward enhancements. The cross sections for the $K^{+}n \to Λ_{c}^{+}X_{0,1}$ are also calculated and found to be larger than that in $K^{+}p$ collisions by more than one order of magnitude. The results are helpful to the possible experiments at J-PARC and COMPASS.
description: 5 pages, 5 figures
title: Inhalt
Creators: name: Redaktion, Die
Publisher: name: University Library Heidelberg
Year: 2014

description: Denkmalpflege in Baden-Württemberg – Nachrichtenblatt der Landesdenkmalpflege, Bd. 24, Nr. 2 (1995), Beginn und Erscheinungsfrequenz: Ausgaben pro Band: 4
Differential operators admitting various rates of spectral projection growth
Creators: name: Mityagin, Boris
name: Siegl, Petr
name: Viola, Joe
Publisher: name: arXiv
Year: 2013
Subjects: subject: Spectral Theory (math.SP)
subject: Mathematical Physics (math-ph)
subject: Functional Analysis (math.FA)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 47A55, 34L10

description: We consider families of non-self-adjoint perturbations of self-adjoint harmonic and anharmonic oscillators. The norms of spectral projections of these operators are found to grow at intermediate rates from arbitrarily slowly to exponentially rapidly.
description: 35 pages, significant revisions, accepted version (published version may differ)
Massive MIMO for Future Wireless Networks: Energy Efficiency, Interference Management and Symbiotic IoT Networks
Creators: Ataeeshojai, Mahtab
Publisher: name: University of Alberta Library
Year: 2023

Due to the dramatic increase in wireless data traffic and the energy consumption of wireless networks, spectral- and energy-efficient wireless networks are imperative. Using multiple-input multiple-output (MIMO) transceiver structures and cell den- sification through small cell (SC) deployment increases both spectral efficiency and energy efficiency significantly and meets future network requirements, but also brings new challenges. These are severe interference, limited fronthaul capacity, computa- tional complexity, cost, and power consumption. Promisingly, radio frequency (RF) energy harvesting, that helps technologies such as Internet of things (IoT) to further reduce the power consumption of devices while providing the desired quality of service (QoS), can benefit from MIMO systems in an overlaying network. This thesis designs high spectrum and energy-efficient cellular networks via three main objectives: 1) design and performance evaluation of an energy-efficient network by integrating MIMO and SC deployments with well-designed interference management and resource allocation methods; 2) design and performance evaluation of computa- tionally efficient precoding algorithms for co-located and cell-free (CF) massive MIMO (mMIMO) systems; 3) design and performance evaluation of energy-harvesting IoT networks underlying and symbiotic with massive MIMO cellular networks. First, we focus on maximizing the energy efficiency of a MIMO-enabled heterogeneous cloud radio access network (H-CRAN) as a candidate architecture for beyond 5G cellular systems. A joint radio resource block allocation and antenna selection algorithm is proposed for the SCs, and a single RF chain structure is considered for the mMIMO macro base station (BS). Moreover, while coordinating transmissions between cells subject to user-centric clustering, an energy-efficient beamforming design, and power allocation optimization problem is formulated and its solution is proposed. Second, we address the implementation complexity of matrix inversion associated with precoding in mMIMO systems. We investigate the convergence of different iterative matrix inversion methods in the presence of small-scale fading, large-scale fading, and spatial correlation and compare their performance and complexity. Third, by considering the coexistence of CF mMIMO and symbiotic backscatter communication and deriving the upper bound for signal-to-interference-plus-noise ratios (SINRs) and also the average harvested power, we provide a novel insight toward efficient implementation of massive machine-type communications (mMTC) use case of 5G and beyond cellular networks.
Cosmological Constraints on Bose-Einstein-Condensed Scalar Field Dark Matter
Creators: name: Li, Bohua
name: Rindler-Daller, Tanja
name: Shapiro, Paul R.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: (Abridged) Despite the success of Cold Dark Matter (CDM) in explaining a wide range of observations, the microscopic nature of dark matter is still unknown. Attempts to detect WIMPs, the most commonly studied form, have not yet succeeded. Some predictions are even in apparent conflict with observations (e.g. cuspy-cored halos and `missing satellite problem'). Therefore, it is important to consider different forms of CDM. We focus on dark matter comprised of ultralight bosons that form a Bose-Einstein Condensate (BEC), described by a complex scalar field, and solve the Klein-Gordon and Einstein field equations to evolve the Friedmann-Robertson-Walker universe. We find, in addition to phases of radiation-, matter- and Λ-domination, an earlier phase of scalar-field-domination. Moreover, while WIMP CDM is non-relativistic at all times after it decouples, BEC scalar field dark matter (SFDM) is relativistic at early times, evolving from stiff to radiation-like, before it becomes non-relativistic (CDM-like) at late times. The timing of transitions between these phases yields fundamental constraints on SFDM model parameters, particle mass m and self-interaction coupling strength λ. We derive the range of particle parameters required to match observations of the evolving background universe, including the CMB and abundances of light elements produced by BBN, characterized by N_eff, the effective number of neutrino species, and the epoch of matter-radiation equality z_eq. This yields m >= 2.4*10^{-21} eV/c^2 and 9.5*10^{-19} eV^{-1}cm^3 <= λ/(mc^2)^2 <= 4*10^{-17} eV^{-1}cm^3. Our model accommodates current observations in which N_eff at BBN is higher than at z_eq, as probed by the CMB, otherwise unexplained by WIMP CDM. SFDM without self-interaction (`Fuzzy Dark Matter') cannot satisfy current BBN constraints within 68% confidence and is therefore disfavored.
description: 21 pages, 6 figures, minor updates to accord with the published version in Phys. Rev. D
The phase diagram of $T\bar{T}$-deformed Yang-Mills theory on the sphere
Creators: name: Griguolo, Luca
name: Panerai, Rodolfo
name: Papalini, Jacopo
name: Seminara, Domenico
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study the large-$N$ dynamics of $T\bar{T}$-deformed two-dimensional Yang-Mills theory at genus zero. The 1/$N$-expansion of the free energy is obtained by exploiting the associated flow equation and the complete phase diagram of the theory is derived for both signs of the rescaled deformation parameter $τ$. We observe a third-order phase transition driven by instanton condensation, which is the deformed version of the familiar Douglas-Kazakov transition separating the weakly-coupled from the strongly-coupled phase. By studying said phases, we compute the deformation of both the perturbative sector and the Gross-Taylor string expansion. Nonperturbative corrections in $τ$ drive the system into an unexplored disordered phase separated by a novel critical line meeting tangentially the Douglas-Kazakov one at a tricritical point. The associated phase transition is induced by the collision of large-$N$ saddle points, determining its second-order character.
description: 25 pages, 3 figures
Evaluating Software Documentation Quality
Creators: Tang, Henry K
Publisher: name: University of Alberta Library
Year: 2023

Software libraries provide reusable code that allow developers to include needed functionality without committing time and effort to develop the functionality themselves. To benefit from the code reuse, developers first compare multiple libraries that offer the needed functionality and spend time learning how to use the library. This is typically done through a combination of trying the library, as well as reading the library's documentation. However, ``bad quality'' documentation is not only ineffective in aiding developers learn a library, but may even be detrimental if there is incorrect information. Thus, it would be useful if developers already had an idea about the documentation quality of a library before they invest time in exploring it.

In this thesis, we investigate a metric-based evaluation of software documentation quality. We start by exploring the literature to confirm the importance of documentation when learning a software library, before finding descriptions of documentation aspects, as well as previous attempts to evaluate documentation quality. We summarize the different quality aspects of documentation, then narrow our focus to six different documentation aspects: Code Examples, Completeness, Ease of Use, Readability, and Up-to-date. From these documentation quality aspects, we utilize the Goal-Question-Metric paradigm to determine the metrics that can be used to measure them. We validate these initial metrics through an interview study of three industry professionals, where we integrate the feedback back into our metrics. After incorporating the interview feedback, we create a summary tool presenting each of our metrics for a given library and conduct a survey with 25 developers on the usefulness of our tool and metrics. Participants found our documentation quality summary useful with a median score of four on a five-point Likert scale rating system. Participants especially found the metrics relating to text readability and code example readability as useful documentation quality metrics. We also discuss opportunities and future applications of our work.
Granular discharge rate for submerged hoppers
Creators: name: Wilson, T. J.
name: Pfeifer, C. R.
name: Mesyngier, N.
name: Durian, D. J.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: The discharge of spherical grains from a hole in the bottom of a right circular cylinder is measured with the entire system underwater. We find that the discharge rate depends on filling height, in contrast to the well-known case of dry non-cohesive grains. It is further surprising that the rate increases up to about twenty five percent, as the hopper empties and the granular pressure head decreases. For deep filling, where the discharge rate is constant, we measure the behavior as a function of both grain and hole diameters. The discharge rate scale is set by the product of hole area and the terminal falling speed of isolated grains. But there is a small-hole cutoff of about two and half grain diameters, which is larger than the analogous cutoff in the Beverloo equation for dry grains.
Asymptotic eigenfunctions for Schrödinger operators on a vector bundle
Creators: name: Ludewig, Matthias
name: Rosenberger, Elke
Publisher: name: arXiv
Year: 2013
Subjects: subject: Mathematical Physics (math-ph)
subject: Analysis of PDEs (math.AP)
subject: Differential Geometry (math.DG)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: In the limit $\hbar\to 0$, we analyze a class of Schrödinger operators $H_\hbar = \hbar^2 L + \hbar W + V\cdot \mathrm{id}$ acting on sections of a vector bundle $\mathcal{Eh}$ over a Riemannian manifold $M$ where $L$ is a Laplace type operator, $W$ is an endomorphism field and the potential energy $V$ has a non-degenerate minimum at some point $p\in M$. We construct quasimodes of WKB-type near $p$ for eigenfunctions associated with the low lying eigenvalues of $H_\hbar$. These are obtained from eigenfunctions of the associated harmonic oscillator $H_{p, \hbar}$ at $p$, acting on smooth functions on the tangent space.
description: 29 pages, minor mistakes corrected
A Deep View into the Nucleus of the Sagittarius Dwarf Spheroidal Galaxy with MUSE. III. Discrete multi-component population-dynamical models based on the Jeans equations
Creators: name: Kacharov, Nikolay
name: Alfaro-Cuello, Mayte
name: Neumayer, Nadine
name: Lützgendorf, Nora
name: Watkins, Laura L.
name: Mastrobuono-Battisti, Alessandra
name: Kamann, Sebastian
name: van de Ven, Glenn
name: Seth, Anil C.
name: Voggel, Karina T.
name: Georgiev, Iskren Y.
name: Leaman, Ryan
name: Bianchini, Paolo
name: Böker, Torsten
name: Mieske, Steffen
Publisher: name: arXiv
Year: 2022
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present comprehensive multi-component dynamical models of M54 (NGC6715), the nuclear star cluster of the Sagittarius dwarf galaxy (Sgr), which is undergoing a tidal disruption in the Milky Way halo. Previous papers in the series used a large MUSE mosaic data set to identify multiple stellar populations in the system and study their kinematic differences. Here we use Jeans-based dynamical models that fit the population properties (mean age and metallicity), spatial distributions, and kinematics simultaneously. They provide a solid physical explanation to our previous findings. The population-dynamical models deliver a comprehensive view of the whole system, and allow us to disentangle the different stellar populations. We explore their dynamical interplay and confirm our previous findings about the build-up of Sgr's nuclear cluster via contributions from globular cluster stars, Sgr inner field stars, and in-situ star formation. We explore various parameterisations of the gravitational potential and show the importance of a radially varying mass-to-light ratio for the proper treatment of the mass profile. We find a total dynamical mass within M54's tidal radius ($\sim75$ pc) of $1.60\pm0.07\times10^6$ Msun in excellent agreement with $N$-body simulations. The metal-poor globular cluster stars contribute about $65\%$ of the total mass or $1.04\pm0.05\times10^6$ Msun. The metal-rich stars can be further divided into young and intermediate age populations that contribute $0.32\pm0.02\times10^6$ Msun ($20\%$) and $0.24\pm0.02\times10^6$ Msun ($15\%$), respectively. Our population-dynamical models successfully distinguish the different stellar populations in Sgr's nucleus because of their different spatial distributions, ages, metallicities, and kinematic features.
description: Accepted for publication in ApJ
How learn the branching ratio X(3872)\to D^{*0}\bar D^0 + c.c
Creators: name: Achasov, N. N.
name: Rogozina, E. V.
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Enfant terrible of charmonium spectroscopy, the resonance $X(3872)$, generated a stream of interpretations and ushered in a new exotic $XYZ$ spectroscopy. In th meantime, many (if not all) characteristics of $X(3872)$ are rather ambiguous. We construct spectra of decays of the resonance $X(3872)$ with good analytical and unitary properties which allows to define the branching ratio of the $X(3872) \to D^{*0}\bar D^0 + c.c.$ decay studying only one more decay, for example, the $X(3872)\toπ^+π^- J/ψ(1S)$ decay. We next define the range of values of the coupling constant of the $X(3872)$ resonance with the $D^{*0}\bar D^0$ system. Finally, we show that our spectra are effective means of selection of models for the resonance $X(3872)$.
description: 8 pages, 4 figures,the published variant
Decay of the $Λ(1405)$ Hyperon to $Σ^0π^0$ Measured at GlueX
Creators: name: Wickramaarachchi, Nilanga
name: Schumacher, Reinhard A.
name: Kalicy, Grzegorz
Publisher: name: arXiv
Year: 2022
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: High Energy Physics - Experiment (hep-ex)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Among the light baryons, the $J^π= \frac{1}{2}^-$ $Λ(1405)$ hyperon is an important special case as it sits just below the $N\bar{K}$ threshold and decays almost exclusively to $Σπ$. Some long-standing hypotheses for $Λ(1405)$ are that it could be a $N\bar{K}$ bound state or a $Σπ$ continuum resonance. It may also be considered as a simple quark-model resonance, the $P$-wave companion of the $Λ(1520)$. In recent years chiral unitary models have suggested that there are two isospin zero poles present in this mass region, and that the "line shape" of the $Λ(1405)$ depends to what extent each of the two poles are stimulated in a given reaction. Below the $N\bar{K}$ threshold, the $Λ(1405)$ decays to the three $Σπ$ charge combinations. The $Σ^{0}π^{0}$ mode is purely $I=0$ and it is uncontaminated by complications arising from $I=1$ scattering processes contributing to the reaction mechanism in the $Σ^{+}π^{-}$ and $Σ^{-}π^{+}$ decays. It is also not affected from production and decay of the nearby $Σ^{0}(1385)$ hyperon. The GlueX experiment at Jefferson Lab has been used to study the $Λ(1405) \to Σ^{0}π^{0}$ decay mode. We focus on the preliminary results of $dσ/dM_{Σ^{0}π^{0}}$ and fits to the line shape of the $Λ(1405)$ region in the $-(t-t_{min})$ range 0 - 1.5 GeV$^2$ from analyzing the reaction $γp \to K^{+}Λ^*$ using the data collected during the first phase of the GlueX program.
description: 6 pages, 4 figures, Proceedings of the 14th International Conference on Hypernuclear and Strange Particle Physics (HYP2022), 27 June to 1 July 2022
Tracing Interstellar Heating: An ALCHEMI Measurement of the HCN Isomers in NGC 253
Creators: name: Behrens, Erica
name: Mangum, Jeffrey G.
name: Holdship, Jonathan
name: Viti, Serena
name: Harada, Nanase
name: Martin, Sergio
name: Sakamoto, Kazushi
name: Muller, Sebastien
name: Tanaka, Kunihiko
name: Nakanishi, Kouichiro
name: Herrero-Illana, Ruben
name: Yoshimura, Yuki
name: Aladro, Rebeca
name: Colzi, Laura
name: Emig, Kimberly L.
name: Henkel, Christian
name: Huang, Ko-Yun
name: Humire, P. K.
name: Meier, David S.
name: Rivilla, Victor M.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We analyze HCN and HNC emission in the nearby starburst galaxy NGC 253 to investigate its effectiveness in tracing heating processes associated with star formation. This study uses multiple HCN and HNC rotational transitions observed using ALMA via the ALCHEMI Large Program. To understand the conditions and associated heating mechanisms within NGC 253's dense gas, we employ Bayesian nested sampling techniques applied to chemical and radiative transfer models which are constrained using our HCN and HNC measurements. We find that the volume density $n_{\text{H}_{2}}$ and cosmic ray ionization rate (CRIR) $ζ$ are enhanced by about an order of magnitude in the galaxy's central regions as compared to those further from the nucleus. In NGC 253's central GMCs, where observed HCN/HNC abundance ratios are lowest, $n \sim 10^{5.5}$ cm$^{-3}$ and $ζ\sim 10^{-12}$ s$^{-1}$ (greater than $10^4$ times the average Galactic rate). We find a positive correlation in the association of both density and CRIR with the number of star formation-related heating sources (supernova remnants, HII regions, and super hot cores) located in each GMC, as well as a correlation between CRIRs and supernova rates. Additionally, we see an anticorrelation between the HCN/HNC ratio and CRIR, indicating that this ratio will be lower in regions where $ζ$ is higher. Though previous studies suggested HCN and HNC may reveal strong mechanical heating processes in NGC 253's CMZ, we find cosmic ray heating dominates the heating budget, and mechanical heating does not play a significant role in the HCN and HNC chemistry.
description: 33 pages, 23 figures, accepted for publication by the Astrophysical Journal
Dynamics of bubble walls at the electroweak phase transition
Creators: name: De Curtis, Stefania
name: Rose, Luigi Delle
name: Guiggiani, Andrea
name: Muyor, Ángel Gil
name: Panico, Giuliano
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: First order phase transitions in the early universe naturally lead to the production of a stochastic background of gravitational waves and to the generation of a matter-antimatter asymmetry. The dynamics of the phase transition is affected by the density perturbations in the hot plasma. We address this topic by providing, for the first time, a full numerical solution to the linearized Boltzmann equation for the top quark species coupled to the Higgs field during a first order phase transition at the electroweak scale. Differently from the traditional approaches, our results do not depend on any ansatz and can fully describe the non-equilibrium distribution functions of the particle species in the plasma.
description: 7 pages, 2 figures, presented by Luigi Delle Rose at QCD@Work-International Workshop on QCD - Theory and Experiment, 27-30 June 2022
Short range order and topology of binary Ge-S glasses
Creators: name: Pethes, Ildikó
name: Jóvári, Pál
name: Michalik, Stefan
name: Wagner, Tomas
name: Prokop, Vit
name: Kaban, Ivan
name: Száraz, Dániel
name: Hannon, Alex
name: Krbal, Milos
Publisher: name: arXiv
Year: 2022
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Short range order and topology of Ge$_x$S$_{100-x}$ glasses over a broad composition range (20 $\le$ x $\le$ 42 in at%) was investigated by neutron diffraction, X-ray diffraction, and Ge K-edge extended X-ray absorption fine structure (EXAFS) measurements. The experimental data sets were fitted simultaneously in the framework of the reverse Monte Carlo simulation method. It was found that both constituents (Ge and S) satisfy the Mott-rule in all investigated glasses: Ge and S atoms have 4 and 2 neighbours, respectively. The structure of these glasses can be described with the chemically ordered network model: Ge-S bonds are preferred, S-S bonds are present only in S-rich glasses. Dedicated simulations showed that Ge-Ge bonds are necessary in Ge-rich glasses. Connections between Ge atoms (such as edge-sharing GeS$_{4/2}$ tetrahedra) in stoichiometric and S-rich glasses were analysed. The frequency of primitive rings was also calculated.
description: published in Journal of Alloys and Compounds
Functional genomic characterization of the Arabidopsis circadian circuit in the plant osmoregulatory and nutrient stress responses
Creators: Khodabocus, Ibrahim
Publisher: name: University of Alberta Library
Year: 2023

Plants require periods of light and darkness to grow and develop properly. In plants, the timing of daily events is facilitated by the circadian clock. Most eukaryotes possess a circadian circuit that is entrained by different inputs such as light and temperature. Here, I show that the only elucidated activator of the circadian clock, RVE8, and its two homologs, RVE4 and RVE6 are required for plants to confer osmotolerance. I show that wild-type (WT) plants perform better than rve 4 6 8 plants by examining primary roots under osmotic and salt stress. Subsequent total proteome analyses between WT and rve 4 6 8 whole seedlings at zeitgeber (ZT)11 and ZT23 illustrate that WT plants have differentially abundant proteins which aid in osmoprotection. Next, I surveyed the circadian clock for its role in regulating nutrient acquisition by utilizing a series of plant lines deficient in different core circadian clock transcription factors. Here, I show that the circadian clock has disparate roles in the regulation of nitrogen (N), phosphorus (P), and sulfur (S) nutrition, through the observation of nutrient-dependent primary root and hypocotyl etiolation phenotypes. After screening a compendium of circadian clock deficient mutants, I undertook a focused characterization of the prr5-11 prr7-11, prr5-11, and prr7-11 mutant plants at zeitgebers ZT0, ZT4, ZT8, and ZT12, under control (CTL), -N, -P, and -S conditions, as these mutant lines exhibited the greatest phenotypic differences under nutrient starvation. Using gas chromatography mass spectrometry (GC-MS), I found that the metabolite pool largely differs within each genotype and across different nutrient regiments, implicating both PRR5 and PRR7 proteins in the regulation of nutrient-mediated outputs in Arabidopsis thaliana. Research conducted throughout my thesis finds that the circadian clock has wide-ranging roles in regulating the osmoregulatory and nutrient stress responses, laying a foundation for future experimentation aimed at further exploring the interplay between the circadian clock and drought or plant nutrition.