cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
An improved quantum-inspired algorithm for linear regression
Creators: name: Gilyén, András
name: Song, Zhao
name: Tang, Ewin
Publisher: name: arXiv
Year: 2020
Subjects: subject: Data Structures and Algorithms (cs.DS)
subject: Quantum Physics (quant-ph)
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences

description: We give a classical algorithm for linear regression analogous to the quantum matrix inversion algorithm [Harrow, Hassidim, and Lloyd, Physical Review Letters'09, arXiv:0811.3171] for low-rank matrices [Wossnig, Zhao, and Prakash, Physical Review Letters'18, arXiv:1704.06174], when the input matrix $A$ is stored in a data structure applicable for QRAM-based state preparation. Namely, suppose we are given an $A \in \mathbb{C}^{m\times n}$ with minimum non-zero singular value $σ$ which supports certain efficient $\ell_2$-norm importance sampling queries, along with a $b \in \mathbb{C}^m$. Then, for some $x \in \mathbb{C}^n$ satisfying $\|x - A^+b\| \leq \varepsilon\|A^+b\|$, we can output a measurement of $|x\rangle$ in the computational basis and output an entry of $x$ with classical algorithms that run in $\tilde{\mathcal{O}}\big(\frac{\|A\|_{\mathrm{F}}^6\|A\|^6}{σ^{12}\varepsilon^4}\big)$ and $\tilde{\mathcal{O}}\big(\frac{\|A\|_{\mathrm{F}}^6\|A\|^2}{σ^8\varepsilon^4}\big)$ time, respectively. This improves on previous "quantum-inspired" algorithms in this line of research by at least a factor of $\frac{\|A\|^{16}}{σ^{16}\varepsilon^2}$ [Chia, Gilyén, Li, Lin, Tang, and Wang, STOC'20, arXiv:1910.06151]. As a consequence, we show that quantum computers can achieve at most a factor-of-12 speedup for linear regression in this QRAM data structure setting and related settings. Our work applies techniques from sketching algorithms and optimization to the quantum-inspired literature. Unlike earlier works, this is a promising avenue that could lead to feasible implementations of classical regression in a quantum-inspired settings, for comparison against future quantum computers.
description: 21 pages, v4 journal version, v2 bug fixed
Sonnenfleckenzeichnung Nr. 13196.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 18.12.1935, erstellt von William Otto Brunner
Creators: name: Eidgenössische Sternwarte in Zürich (ETH Zürich bzw. vor 1911 Polytechnikum)
Publisher: name: [s.n.]
Year: 1935

description: Bleistiftzeichnung mit Tinte und Farbstift überschrieben, erstellt als Projektionsbildzeichnung in der Eidgenössischen Sternwarte Zürich, später ergänzt mit einer kleinen Tabelle für die Auszählung der Flecken nach ihrer Verteilung auf Abschnitte der sichtbaren Sonnenhälfte, nach Quadrant bzw. nach Halbkugel (N, S, W, E). Instrument: Kern-Merz-Refraktor.
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden mit Bleistift auf einem Vordruck eingetragen. Zugeordnete numerische Werte wurden in einer separat geführten, chronologischen Tabelle erfasst. Unter Umständen sind tabellarisch notierte Werte, die für Protuberanzen mit rot geschrieben wurden, direkt auf der Fleckenzeichnung vermerkt
description: ETH-Bibliothek
Experiences of Instructors in Online Learning Environments: Regulating Our Emotions to Enhance Instruction
Creators: name: Hudson Baker, Pamela
name: Evmenova, Anya
name: Regan, Kelley
Publisher: name: Innovations in Teaching & Learning Conference Proceedings
Year: 2011
Subjects: teaching online; digital pedagogy; digital tools; mindfulness; well-being;

description: Like students, instructors often feel anxious and isolated teaching in an online environment. Our concerns include workload, quality of instruction, technology skills, and accessibility. This interactive session will share the results of a focus group study involving six university faculty members with varied experiences teaching in on-line learning environments (synchronous and asynchronous). The overarching themes from the preliminary analysis include faculty emotions of feeling (a) restricted, (b) stressed, (c) devalued, (d) validated, (e) intrigued and liberated. Specific examples representative of these themes will be shared. We will also emphasize the practical management strategies which participants reportedly used to regulate emotions and enhance online instruction. A consensus among all participants was that continuous dialogue in a community of practice about strategies to enhance on-line learning environments is needed. This session will act as a forum for extending this dialogue.
description: Innovations in Teaching & Learning Conference Proceedings, Vol 3 (2011): Building Bridges Through Innovative Teaching
Sonnenfleckenzeichnung Nr. 13155.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 02.11.1935, erstellt als Zürcher Tagesaufnahme von William Otto Brunner
Creators: name: Eidgenössische Sternwarte in Zürich (ETH Zürich bzw. vor 1911 Polytechnikum)
Publisher: name: [s.n.]
Year: 1935

description: Bleistiftzeichnung mit Tinte und Farbstift überschrieben, erstellt als Projektionsbildzeichnung in der Eidgenössischen Sternwarte Zürich, später ergänzt mit einer kleinen Tabelle für die Auszählung der Flecken nach ihrer Verteilung auf Abschnitte der sichtbaren Sonnenhälfte, nach Quadrant bzw. nach Halbkugel (N, S, W, E). Instrument: Kern-Merz-Refraktor.
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden mit Bleistift auf einem Vordruck eingetragen. Zugeordnete numerische Werte wurden in einer separat geführten, chronologischen Tabelle erfasst. Unter Umständen sind tabellarisch notierte Werte, die für Protuberanzen mit rot geschrieben wurden, direkt auf der Fleckenzeichnung vermerkt
description: ETH-Bibliothek
Evaluating the structure-coefficient theorem of evolutionary game theory
Creators: name: McAvoy, Alex
name: Wakeley, John
Publisher: name: arXiv
Year: 2020
Subjects: subject: Populations and Evolution (q-bio.PE)
subject: FOS: Biological sciences

description: In order to accommodate the empirical fact that population structures are rarely simple, modern studies of evolutionary dynamics allow for complicated and highly-heterogeneous spatial structures. As a result, one of the most difficult obstacles lies in making analytical deductions, either qualitative or quantitative, about the long-term outcomes of evolution. The "structure-coefficient" theorem is a well-known approach to this problem for mutation-selection processes under weak selection, but a general method of evaluating the terms it comprises is lacking. Here, we provide such a method for populations of fixed (but arbitrary) size and structure, using easily interpretable demographic measures. This method encompasses a large family of evolutionary update mechanisms and extends the theorem to allow for asymmetric contests to provide a better understanding of the mutation-selection balance under more realistic circumstances. We apply the method to study social goods produced and distributed among individuals in spatially-heterogeneous populations, where asymmetric interactions emerge naturally and the outcome of selection varies dramatically depending on the nature of the social good, the spatial topology, and frequency with which mutations arise.
description: 52 pages; final version
Engaging Students Through Role Plays
Creators: name: Cerasani, Gina
name: Finley, Ethan
name: Hirsch, Susan
name: Schoeny, Mara
Publisher: name: Innovations in Teaching & Learning Conference Proceedings
Year: 2011
Subjects: student engagement; student motivation; pedagogy; mindfulness;

description: Role plays may be used in the classroom as a way of enhancing student engagement. However, we know little about specifically how role plays increase student engagement, whether some types of role play activities work better than others, and how teachers can effectively use role plays to encourage various forms of student engagement. This session presents research findings on studentsâ€™ empathy for characters in a role play as a form of engagement, achieving â€œflowâ€ through role play, and studentsâ€™ selfreports of engagement during role play. Session participants will be encouraged to consider the types of role plays they might use to enhance engagement in their classrooms. This presentation highlights findings
from a FIPSE-funded project titled â€œLinking Theory to Practice: ConflictAnalysis and Resolution Pedagogyâ€ that includes research conducted in Mason classrooms.
description: Innovations in Teaching & Learning Conference Proceedings, Vol 3 (2011): Building Bridges Through Innovative Teaching
title: Discrepancies Between Parent- and Child-Reported Anxiety Symptoms in Autistic and Non-Autistic Youth
Creators: name: Resnick, Rachel
Publisher: name: Digital Repository at the University of Maryland
Year: 2025
Subjects: subject: Psychology
subject: FOS: Psychology
subject: BSOS
subject: Autism
subject: Anxiety

description: Anxiety is one of the most common co-occurring conditions in youth on the autism spectrum (ASD) and can manifest differently compared to non-ASD youth, making it difficult to identify anxiety in ASD youth. The Screen for Child Anxiety-Related Emotional Disorders (SCARED; Birhmaher et al., 1997) is a gold-standard measurement tool that aims to provide a dual-informed perspective of anxiety symptoms (Behrens et al., 2020). However, discrepancies between parent and child reports have been observed, suggesting a need for further analysis of whether discrepancies vary by diagnostic group (ASD or non-ASD). This study aimed to determine if discrepancies existed between parent- and self-reported anxiety symptoms and if there was a difference between diagnostic groups. Data were obtained from a larger study examining anxiety and heart rate variability in youth. Results of a correlation test showed that parent and child-reported anxiety symptoms scores were not statistically significantly correlated (r = 0.33, p = .07). An independent samples t-test indicated that there was a significant difference between parent-reported and child-reported anxiety symptoms (t = - 3.00, p = .01), such that parent anxiety symptom ratings were 7.4 points lower than child anxiety symptoms (95% CI [-13.33, -2.5]). There was a significant mean difference between the discrepancies for the ASD and non-ASD groups (t = -3.41, p = .001) with a higher rate of discrepancy in the non-ASD group (95% CI [-15.44, 0.07]). These results indicate that parents of non-ASD youth are more likely to underreport their child’s anxiety symptoms, while parents of ASD youth are more likely to align with their child’s report.
Sonnenfleckenzeichnung Nr. 13166.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 13.11.1935, erstellt von William Brunner, Assistent
Creators: name: Eidgenössische Sternwarte in Zürich (ETH Zürich bzw. vor 1911 Polytechnikum)
Publisher: name: [s.n.]
Year: 1935

description: Bleistiftzeichnung mit Tinte und Farbstift überschrieben, erstellt als Projektionsbildzeichnung in der Eidgenössischen Sternwarte Zürich, später ergänzt mit einer kleinen Tabelle für die Auszählung der Flecken nach ihrer Verteilung auf Abschnitte der sichtbaren Sonnenhälfte, nach Quadrant bzw. nach Halbkugel (N, S, W, E). Instrument: Kern-Merz-Refraktor.
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden mit Bleistift auf einem Vordruck eingetragen. Zugeordnete numerische Werte wurden in einer separat geführten, chronologischen Tabelle erfasst. Unter Umständen sind tabellarisch notierte Werte, die für Protuberanzen mit rot geschrieben wurden, direkt auf der Fleckenzeichnung vermerkt
description: ETH-Bibliothek
Sonnenfleckenzeichnung Nr. 5745.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 19.03.1958, erstellt von Sergio Cortesi, Sonnenobservatorium Specola Solare Ticinese in Locarno
Creators: name: Observatorium Specola Solare Ticinese Locarno (1957 bis 1980 Teil der Eidgenössischen Sternwarte der ETH Zürich)
Publisher: name: [s.n.]
Year: 1958

description: Bleistiftzeichnung mit Tinte und Farbstift, erstellt als Projektionsbildzeichnung für die Beobachtungen in Locarno-Monti auf dem Vordruck der Eidgenössischen Sternwarte Zürich. Instrument: Zeiss-Coudé-Refraktor mit 15 cm Öffnung und 225 cm Brennweite.
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
description: ETH-Bibliothek
Sonnenfleckenzeichnung Nr. 5742.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 14.03.1958, erstellt von Sergio Cortesi, Sonnenobservatorium Specola Solare Ticinese in Locarno
Creators: name: Observatorium Specola Solare Ticinese Locarno (1957 bis 1980 Teil der Eidgenössischen Sternwarte der ETH Zürich)
Publisher: name: [s.n.]
Year: 1958

description: Bleistiftzeichnung mit Tinte und Farbstift, erstellt als Projektionsbildzeichnung für die Beobachtungen in Locarno-Monti auf dem Vordruck der Eidgenössischen Sternwarte Zürich. Instrument: Zeiss-Coudé-Refraktor mit 15 cm Öffnung und 225 cm Brennweite.
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
description: ETH-Bibliothek
Transverse instability and universal decay of spin spiral order in the Heisenberg model
Creators: name: Rodriguez-Nieva, Joaquin F.
name: Schuckert, Alexander
name: Sels, Dries
name: Knap, Michael
name: Demler, Eugene
Publisher: name: arXiv
Year: 2020
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We analyze the stability of spin spiral states in the two-dimensional Heisenberg model. Our analysis reveals that the SU(2) symmetric point hosts a dynamic instability that is enabled by the existence of energetically favorable transverse deformations---both in real and spin space---of the spiral order. The instability is universal in the sense that it applies to systems with any spin number, spiral wavevector, and spiral amplitude. Unlike the Landau or modulational instabilities which require impurities or periodic potential modulation of an optical lattice, quantum fluctuations alone are sufficient to trigger the transverse instability. We analytically find the most unstable mode and its growth rate, and compare our analysis with phase space methods. By adding an easy plane exchange coupling that reduces the Hamiltonian symmetry from SU(2) to U(1), the stability boundary is shown to continuously interpolate between the modulational instability and the transverse instability. This suggests that the transverse instability is an important mechanism that hinders the formation of a spin superfluid, even in the presence of strong exchange anisotropy.
description: 6+5 pages, 3+3 figures
Students as Scholars: Integrating Independent Research into Undergraduate Education
Creators: name: Portillo, Shannon
name: Rudes, Danielle
Publisher: name: Innovations in Teaching & Learning Conference Proceedings
Year: 2011
Subjects: research experiences for undergraduates; student writing; self-regulated study; critical thinking; evidence-based practices; experiential learning

description: Undergraduate programs across the country are working to develop students as scholars, integrating independent scholarly experiences into traditional undergraduate classroom environments (see for example GMUâ€™s QEP). However, there is little empirical work exploring how students adapt to their new role as scholars. How do students integrate research into their undergraduate classroom experience? Based on teaching experience, participant observation and preâ€ and postâ€semester survey data, we discuss the process of students as scholars. We focus on how students analyze the data they gather and integrate their research experience into their overall learning for the course.
description: Innovations in Teaching & Learning Conference Proceedings, Vol 3 (2011): Building Bridges Through Innovative Teaching
Sonnenfleckenzeichnung Nr. 5732.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 03.03.1958, erstellt von Sergio Cortesi, Sonnenobservatorium Specola Solare Ticinese in Locarno
Creators: name: Observatorium Specola Solare Ticinese Locarno (1957 bis 1980 Teil der Eidgenössischen Sternwarte der ETH Zürich)
Publisher: name: [s.n.]
Year: 1958

description: Bleistiftzeichnung mit Tinte und Farbstift, erstellt als Projektionsbildzeichnung für die Beobachtungen in Locarno-Monti auf dem Vordruck der Eidgenössischen Sternwarte Zürich. Instrument: Zeiss-Coudé-Refraktor mit 15 cm Öffnung und 225 cm Brennweite.
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
description: ETH-Bibliothek
Simplicial homeomorphs and trace-bounded hypergraphs
Creators: name: Long, Jason
name: Narayanan, Bhargav
name: Yap, Corrine
Publisher: name: arXiv
Year: 2020
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: Primary 05E45, Secondary 05C65, 05C35

description: Our first main result is a uniform bound, in every dimension $k \in \mathbb N$, on the topological Turán numbers of $k$-dimensional simplicial complexes: for each $k \in \mathbb N$, there is a $λ_k \ge k^{-2k^2}$ such that for any $k$-complex $\mathcal{S}$, every $k$-complex on $n \ge n_0(\mathcal{S})$ vertices with at least $n^{k+1 - λ_k}$ facets contains a homeomorphic copy of $\mathcal{S}$. This was previously known only in dimensions one and two, both by highly dimension-specific arguments: the existence of $λ_1$ is a result of Mader from 1967, and the existence of $λ_2$ was suggested by Linial in 2006 and recently proved by Keevash-Long-Narayanan-Scott. We deduce this geometric fact from a purely combinatorial result about trace-bounded hypergraphs, where an $r$-partite $r$-graph $H$ with partite classes $V_1, V_2, \dots, V_r$ is said to be $d$-trace-bounded if for each $2 \le i \le r$, all the vertices of $V_i$ have degree at most $d$ in the trace of $H$ on $V_1 \cup V_2 \cup \dots \cup V_i$. Our second main result is the following estimate for the Turán numbers of degenerate trace-bounded hypergraphs: for all $r \ge 2$ and $d\in\mathbb N$, there is an $α_{r,d} \ge (5rd)^{1-r}$ such that for any $d$-trace-bounded $r$-partite $r$-graph $H$, every $r$-graph on $n \ge n_0(H)$ vertices with at least $n^{r - α_{r,d}}$ edges contains a copy of $H$. This strengthens a result of Conlon-Fox-Sudakov from 2009 who showed that such a bound holds for $r$-partite $r$-graphs $H$ satisfying the stronger hypothesis that the vertex-degrees in all but one of its partite classes are bounded (in $H$, as opposed to in its traces).
description: 12 pages
Constraining modified gravity with quantum optomechanics
Creators: name: Qvarfort, Sofia
name: Rätzel, Dennis
name: Stopyra, Stephen
Publisher: name: Humboldt-Universität zu Berlin
Year: 2022
Subjects: subject: optomechanics
subject: quantum metrology
subject: modified gravity
subject: 530 Physik

description: We derive the best possible bounds that can be placed on Yukawa- and chameleon-like modifications to the Newtonian gravitational potential with a cavity optomechanical quantum sensor. By modelling the effects on an oscillating source-sphere on the optomechanical system from first-principles, we derive the fundamental sensitivity with which these modifications can be detected in the absence of environmental noise. In particular, we take into account the large size of the optomechanical probe compared with the range of the fifth forces that we wish to probe and quantify the resulting screening effect when both the source and probe are spherical. Our results show that optomechanical systems in high vacuum could, in principle, further constrain the parameters of chameleon-like modifications to Newtonian gravity.
Balaenopteridae Gray 1864
Creators: name: Russell A. Mittermeier
name: Don E. Wilson
Publisher: name: Lynx Edicions
Year: 2014
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Mammalia
Cetacea
Balaenopteridae

description: Family BALAENOPTERIDAE
(RORQUALS)
• Extremely large baleen whales with streamlined bodies, longitudinally furrowed undersides, small dorsal fin, four-digit slender pectoral flippers, and broad propulsive caudal flukes; filterfeeding specialists.
• 750-3200 cm.
• Cosmopolitan, inhabiting all the world's oceans.
• (Coastal to pelagic waters from surface to depths greater than 300 m.
• 2 genera, 8 species, 13 taxa.
• 3 species. Endangered; none Extinct. since. 1600
description: Published as part of Russell A. Mittermeier & Don E. Wilson, 2014, Balaenopteridae, pp. 242-299 in Handbook of the Mammals of the World – Volume 4 Sea Mammals, Barcelona :Lynx Edicions on page 242, DOI: 10.5281/zenodo.6596011
Sonnenfleckenzeichnung Nr. 5726.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 23.02.1958, erstellt von Sergio Cortesi, Sonnenobservatorium Specola Solare Ticinese in Locarno
Creators: name: Observatorium Specola Solare Ticinese Locarno (1957 bis 1980 Teil der Eidgenössischen Sternwarte der ETH Zürich)
Publisher: name: [s.n.]
Year: 1958

description: Bleistiftzeichnung mit Tinte und Farbstift, erstellt als Projektionsbildzeichnung für die Beobachtungen in Locarno-Monti auf dem Vordruck der Eidgenössischen Sternwarte Zürich. Instrument: Zeiss-Coudé-Refraktor mit 15 cm Öffnung und 225 cm Brennweite.
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
description: ETH-Bibliothek
Enhancing College Students’ Learning Through Action Research and Collaborative Inquiry
Creators: name: Sklarew, Dann
name: Coolidge, Joan
name: Stribling, Stacia
name: Wagner, Wendy
Publisher: name: Innovations in Teaching & Learning Conference Proceedings
Year: 2011
Subjects: collaborative learning; active learning; team-based learning; research experiences for undergraduates

description: What is action research and how can it be applied in the college course context? Per NCREL, "Action research is inquiry or research in the context of focused efforts to improve the quality of an organization and its performance... Action research can be done by individuals or by teams of colleagues. The team approach is called collaborative inquiry." What are the steps in this applied scholarship and how can it be implemented in the context of education at Mason? This process is presented with illustration from a new undergraduate capstone course in sustainability studies. Other examples may be provided or opportunities explored by participants.
description: Innovations in Teaching & Learning Conference Proceedings, Vol 3 (2011): Building Bridges Through Innovative Teaching
Building and Assessing an Effective Distance Education Course
Creators: name: Anderson, David
name: Hanfman, Elizabeth
name: Norden, Luanne
Publisher: name: Innovations in Teaching & Learning Conference Proceedings
Year: 2011
Subjects: pedagogy; hybrid courses; teaching online; digital pedagogy; assessment

description: Discover the impact of two different teaching methodologies of the same courseâ€”a face-to-face section and a distance education sectionâ€”through a summary of survey results and a discussion on the effective textbook publisher resources utilized in the distance education section
description: Innovations in Teaching & Learning Conference Proceedings, Vol 3 (2011): Building Bridges Through Innovative Teaching
Möbius disjointness for a class of exponential functions
Creators: name: Gu, Weichen
name: Wei, Fei
Publisher: name: arXiv
Year: 2020
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics

description: A vast class of exponential functions are shown to be deterministic. This class includes functions whose exponents are polynomial-like or "piece-wise" close to polynomials after differentiation. Many of these functions are proved to be disjoint from the Möbius function.
description: 37 pages. To better understand the main results of this paper, we split it into two independent papers. The second paper is arXiv:2101.10134. The paper is accepted by The Quarterly Journal of Mathematics at https://doi.org/10.1093/qmath/haac009
Non-Equilibrium Dynamics of a Dissipative Two-Site Hubbard Model Simulated on IBM Quantum Computers
Creators: name: Tornow, Sabine
name: Gehrke, Wolfgang
name: Helmbrecht, Udo
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Many-body physics is one very well suited field for testing quantum algorithms and for finding working heuristics on present quantum computers. We have investigated the non-equilibrium dynamics of one- and two-electron systems, which are coupled to an environment that introduces decoherence and dissipation. In our approach, the electronic system is represented in the framework of a two-site Hubbard model while the environment is modelled by a spin bath. To simulate the non-equilibrium population probabilities of the different states on a quantum computer we have encoded the electronic states and environmental degrees of freedom into qubits and ancilla qubits (bath), respectively. The total evolution time was divided into short time intervals, during which the system evolves. After each of these time steps, the system interacts with ancilla qubits representing the bath in thermal equilibrium. We have specifically studied spin baths leading to both, unital and non-unital dynamics of the electronic system and have found that electron correlations clearly enhance the electron transfer rates in the latter case. For short time periods, the simulation on the quantum computer is found to be in very good agreement with the exact results if error mitigation methods are applied. Our method to simulate also non-unitary time-evolution on a quantum computer can be well extended to simulate electronic systems in correlated spin baths as well as in bosonic and fermionic baths.
Mapping Impervious Surface Using Phenology-Integrated and Fisher Transformed Linear Spectral Mixture Analysis
Creators: name: Ouyang, Linke
name: Wu, Caiyan
name: Li, Junxiang
name: Liu, Yuhan
name: Wang, Meng
name: Han, Ji
name: Song, Conghe
name: Yu, Qian
name: Haase, Dagmar
Publisher: name: Humboldt-Universität zu Berlin
Year: 2022
Subjects: subject: impervious surface area
subject: phenology information
subject: Fisher transformation
subject: linear spectral mixture analysis
subject: endmember variability
subject: Google Earth Engine
subject: seasonally exposed soil
subject: VIS model
subject: Shanghai
subject: Landsat
subject: 333.7 Landflächen, Naturräume für Freizeit und Erholung, Naturreservate, Energie

description: The impervious surface area (ISA) is a key indicator of urbanization, which brings out serious adverse environmental and ecological consequences. The ISA is often estimated from remotely sensed data via spectral mixture analysis (SMA). However, accurate extraction of ISA using SMA is compromised by two major factors, endmember spectral variability and plant phenology. This study developed a novel approach that incorporates phenology with Fisher transformation into a conventional linear spectral mixture analysis (PF-LSMA) to address these challenges. Four endmembers, high albedo, low albedo, evergreen vegetation, and seasonally exposed soil (H-L-EV-SS) were identified for PF-LSMA, considering the phenological characteristic of Shanghai. Our study demonstrated that the PF-LSMA effectively reduced the within-endmember spectral signature variation and accounted for the endmember phenology effects, and thus well-discriminated impervious surface from seasonally exposed soil, enhancing the accuracy of ISA extraction. The ISA fraction map produced by PF-LSMA (RMSE = 0.1112) outperforms the single-date image Fisher transformed unmixing method (F-LSMA) (RMSE = 0.1327) and the other existing major global ISA products. The PF-LSMA was implemented on the Google Earth Engine platform and thus can be easily adapted to extract ISA in other places with similar climate conditions.
Generating Interactive Study Among Undergraduates
Creators: name: Uhen, Mark
Publisher: name: Innovations in Teaching & Learning Conference Proceedings
Year: 2011
Subjects: research experiences for undergraduates; collaborative learning; team-based learning

description: Find out about two new approaches to teaching a class in vertebrate paleontology to encourage cooperative learning among students: a Wiki site and a course research project.
description: Innovations in Teaching & Learning Conference Proceedings, Vol 3 (2011): Building Bridges Through Innovative Teaching
Sonnenfleckenzeichnung Nr. 13175, einen Zürcher Lückentag ergänzend.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 23.11.1935, erstellt von Friedrich Buser in der privaten Beobachtungsstation im Prätschli in Arosa
Creators: name: Buser, Friedrich
Publisher: name: [s.n.]
Year: 1935

description: Bleistiftzeichnung mit Tinte und Farbstift überschrieben, erstellt als Projektionsbildzeichnung in der privaten Beobachtungsstation Prätschli in Arosa, später ergänzt mit einer kleinen Tabelle für die Auszählung der Flecken nach ihrer Verteilung auf Abschnitte der sichtbaren Sonnenhälfte, nach Quadrant bzw. nach Halbkugel (N, S, W, E). Instrument: 15-cm-Zeiss-Refraktor.
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden mit Bleistift auf einem Vordruck eingetragen. Unter Umständen sind tabellarisch notierte Werte, die für Protuberanzen mit rot geschrieben wurden, direkt auf der Fleckenzeichnung vermerkt
description: ETH-Bibliothek
A game of quantum advantage: linking verification and simulation
Creators: name: França, Daniel Stilck
name: Garcia-Patron, Raul
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We present a formalism that captures the process of proving quantum superiority to skeptics as an interactive game between two agents, supervised by a referee. Bob, is sampling from a classical distribution on a quantum device that is supposed to demonstrate a quantum advantage. The other player, the skeptical Alice, is then allowed to propose mock distributions supposed to reproduce Bob's device's statistics. He then needs to provide witness functions to prove that Alice's proposed mock distributions cannot properly approximate his device. Within this framework, we establish three results. First, for random quantum circuits, Bob being able to efficiently distinguish his distribution from Alice's implies efficient approximate simulation of the distribution. Secondly, finding a polynomial time function to distinguish the output of random circuits from the uniform distribution can also spoof the heavy output generation problem in polynomial time. This pinpoints that exponential resources may be unavoidable for even the most basic verification tasks in the setting of random quantum circuits. Beyond this setting, by employing strong data processing inequalities, our framework allows us to analyse the effect of noise on classical simulability and verification of more general near-term quantum advantage proposals.
description: 44 pages, to be published in Quantum. New version is substantially extended and contains new connections between previous results and the linear cross entropy
Promoting Critical Thinking Through a Project Planning and Implementation Assignment
Creators: name: Davis, Molly
Publisher: name: Innovations in Teaching & Learning Conference Proceedings
Year: 2011
Subjects: critical thinking; digital tools;

description: Hear about an assignment that is designed to teach students skills in project planning and implementation using an e-portfolio to chronicle their learning and use of critical thinking skills.
description: Innovations in Teaching & Learning Conference Proceedings, Vol 3 (2011): Building Bridges Through Innovative Teaching
Sonnenfleckenzeichnung Nr. 13151, einen Zürcher Lückentag ergänzend.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 26.10.1935, erstellt von Friedrich Buser in der privaten Beobachtungsstation im Prätschli in Arosa
Creators: name: Buser, Friedrich
Publisher: name: [s.n.]
Year: 1935

description: Bleistiftzeichnung mit Tinte und Farbstift überschrieben, erstellt als Projektionsbildzeichnung in der privaten Beobachtungsstation Prätschli in Arosa, später ergänzt mit einer kleinen Tabelle für die Auszählung der Flecken nach ihrer Verteilung auf Abschnitte der sichtbaren Sonnenhälfte, nach Quadrant bzw. nach Halbkugel (N, S, W, E). Instrument: 15-cm-Zeiss-Refraktor.
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden mit Bleistift auf einem Vordruck eingetragen. Unter Umständen sind tabellarisch notierte Werte, die für Protuberanzen mit rot geschrieben wurden, direkt auf der Fleckenzeichnung vermerkt
description: ETH-Bibliothek
Discovery Learning for Digital Natives in Class and Online
Creators: name: Muir, Janette
name: Muir, Star
Publisher: name: Innovations in Teaching & Learning Conference Proceedings
Year: 2011
Subjects: digital tools; digital pedagogy; student engagement;

description: Empowering todayâ€™s students to bridge the external world and the internal dynamic of a classroom community is demonstrated here through strategies to encourage informationâ€ and technologyâ€rich interactions within classroom discussion and to create opportunities for coâ€creation of Action Research goals, procedures and outcomes using a wiki. Illustrating techniques for encouraging the use of student mobile technologies within class as a means of fostering discovery learning (and avoiding linear transmission lectures), this session will include attitudeâ€framing technology etiquette statements for syllabi and â€œplaysheetâ€ challenges motivating student engagement. These techniques and additional strategies are then applied to student discovery via Action Research in the field with a student authored and coâ€created wiki. Attendees will briefly experience a discovery process, receive assignment handouts, discuss lessons learned, and be prepared to integrate such activities in their own coursework.
description: Innovations in Teaching & Learning Conference Proceedings, Vol 3 (2011): Building Bridges Through Innovative Teaching
Clustering with Semidefinite Programming and Fixed Point Iteration
Creators: name: Felzenszwalb, Pedro
name: Klivans, Caroline
name: Paul, Alice
Publisher: name: arXiv
Year: 2020
Subjects: subject: Optimization and Control (math.OC)
subject: Data Structures and Algorithms (cs.DS)
subject: Machine Learning (cs.LG)
subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences

description: We introduce a novel method for clustering using a semidefinite programming (SDP) relaxation of the Max k-Cut problem. The approach is based on a new methodology for rounding the solution of an SDP relaxation using iterated linear optimization. We show the vertices of the Max k-Cut relaxation correspond to partitions of the data into at most k sets. We also show the vertices are attractive fixed points of iterated linear optimization. Each step of this iterative process solves a relaxation of the closest vertex problem and leads to a new clustering problem where the underlying clusters are more clearly defined. Our experiments show that using fixed point iteration for rounding the Max k-Cut SDP relaxation leads to significantly better results when compared to randomized rounding.
Triaxiality in galaxy clusters: Mass versus Potential reconstructions
Creators: name: Stapelberg, Sebastian
name: Tchernin, Céline
name: Hug, Damaris
name: Lau, Erwin T.
name: Bartelmann, Matthias
Publisher: name: arXiv
Year: 2020
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Accounting for the triaxial shapes of galaxy clusters will become important in the context of upcoming cosmological surveys. We show that, compared to the gas density distribution, the cluster gravitational potential can be better characterised by a simple 3D model and is more robust against fluctuations. Perturbations in the gas density distribution can have a substantial influence on the derived thermodynamic properties, while cluster potentials are smooth and well-approximated by a spheroidal model. We use a statistical sample of 85 galaxy clusters from a large cosmological hydrodynamical simulation to investigate cluster shapes as a function of radius. In particular, we examine the shape of isodensity and isopotential shells and analyze how it is affected by the choice of component (gas vs. potential), substructure removal (for the gas density) and the definition of the computation domain (interior vs. shells). We find that the orientation and axis ratios of gas isodensity contours are degenerate with the presence of substructures and unstable against fluctuations. We observe that, as the derived cluster shape depends on the method used for removing the substructures, thermodynamic properties extracted from e.g. X-ray emissivity profiles suffer from this additional, often underestimated bias. In contrast, the shape reconstruction of the potential is largely unaffected by these factors and converges towards simple geometric models for both relaxed and dynamically active clusters. The observation that cluster potentials are better represented by simple geometrical models and reconstructed with a low level of systematics for both dynamically active and relaxed clusters suggests that by characterising galaxy clusters by their potential rather than by their mass, dynamically active and relaxed clusters could be combined in cosmological studies, improving statistics and lowering scatter.
description: Updated with referee's comments, revised version submitted to A&A, 16 pages, 14 figures
Editorial Information
Creators: name: Stearns Center, Stearns Center
Publisher: name: Innovations in Teaching & Learning Conference Proceedings
Year: 2012

description: Conference Co-Director:

Kimberly Eby

Conference Co-Director:

Joshua Eyler

Conference Co-Director:

Katrina Joseph

Conference Coordinator:

Ashleen Gayda

Advisory Committee:

Sarah Baker

Dawn Fels

Goodlett McDaniel

Janette Muir

John Oâ€™Connor

Joy Taylor

Bethany Usher

Terry Zawacki

Logistical Coordination:

Karen Tai (Office of Events Management)

Logistical Support:

Events Production

Rebecca Jones

Sabrina Lunin

Lindsey Lowenberg

John O'Connor

Denise Nazaire

Dave Petty

Shelley Reid

Shawn Lee's TOUR 440 Students

The Writing Center Tutors

Co-sponsors:

Bedford/St. Martin's; Center for the Arts; College of Education and Human Development; College of Health and Human Services; College of Humanities and Social Sciences; College of Science; College of Visual and Performing Arts; Division of Instructional Technology; Higher Education Program; Hylton Performing Arts Center; Office of Student Scholarship; Creative Activities, and Research; Mason Inn Conference Center & Hotel; Online Education; Patriot Computers; School for Conflict Analysis and Resolution; School of Management; School of Public Policy; University Libraries; University Life; Volgenau School of Engineering; Writing Across the Curriculum; and The Writing Center.
description: Innovations in Teaching & Learning Conference Proceedings, Vol 4 (2012): Becoming a Skillful Teacher
Sonnenfleckenzeichnung Nr. 5728.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 27.02.1958, erstellt von Sergio Cortesi, Sonnenobservatorium Specola Solare Ticinese in Locarno
Creators: name: Observatorium Specola Solare Ticinese Locarno (1957 bis 1980 Teil der Eidgenössischen Sternwarte der ETH Zürich)
Publisher: name: [s.n.]
Year: 1958

description: Bleistiftzeichnung mit Tinte und Farbstift, erstellt als Projektionsbildzeichnung für die Beobachtungen in Locarno-Monti auf dem Vordruck der Eidgenössischen Sternwarte Zürich. Instrument: Zeiss-Coudé-Refraktor mit 15 cm Öffnung und 225 cm Brennweite.
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
description: ETH-Bibliothek
The $3$-closure of a solvable permutation group is solvable
Creators: name: O'Brien, E. A.
name: Ponomarenko, I.
name: Vasil'ev, A. V.
name: Vdovin, E.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Group Theory (math.GR)
subject: FOS: Mathematics
subject: 20B05

description: Let $m$ be a positive integer and let $Ω$ be a finite set. The $m$-closure of $G\leq\operatorname{Sym}(Ω)$ is the largest permutation group on $Ω$ having the same orbits as $G$ in its induced action on the Cartesian product $Ω^m$. The $1$-closure and $2$-closure of a solvable permutation group need not be solvable. We prove that the $m$-closure of a solvable permutation group is always solvable for $m\geq3$.
Sonnenfleckenzeichnung Nr. 5738.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 09.03.1958, erstellt von Sergio Cortesi, Sonnenobservatorium Specola Solare Ticinese in Locarno
Creators: name: Observatorium Specola Solare Ticinese Locarno (1957 bis 1980 Teil der Eidgenössischen Sternwarte der ETH Zürich)
Publisher: name: [s.n.]
Year: 1958

description: Bleistiftzeichnung mit Tinte und Farbstift, erstellt als Projektionsbildzeichnung für die Beobachtungen in Locarno-Monti auf dem Vordruck der Eidgenössischen Sternwarte Zürich. Instrument: Zeiss-Coudé-Refraktor mit 15 cm Öffnung und 225 cm Brennweite.
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
description: ETH-Bibliothek
Sonnenfleckenzeichnung Nr. 5737.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 08.03.1958, erstellt von Sergio Cortesi, Sonnenobservatorium Specola Solare Ticinese in Locarno
Creators: name: Observatorium Specola Solare Ticinese Locarno (1957 bis 1980 Teil der Eidgenössischen Sternwarte der ETH Zürich)
Publisher: name: [s.n.]
Year: 1958

description: Bleistiftzeichnung mit Tinte und Farbstift, erstellt als Projektionsbildzeichnung für die Beobachtungen in Locarno-Monti auf dem Vordruck der Eidgenössischen Sternwarte Zürich. Instrument: Zeiss-Coudé-Refraktor mit 15 cm Öffnung und 225 cm Brennweite.
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
description: ETH-Bibliothek
Sonnenfleckenzeichnung Nr. 5731.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 02.03.1958, erstellt von Sergio Cortesi, Sonnenobservatorium Specola Solare Ticinese in Locarno
Creators: name: Observatorium Specola Solare Ticinese Locarno (1957 bis 1980 Teil der Eidgenössischen Sternwarte der ETH Zürich)
Publisher: name: [s.n.]
Year: 1958

description: Bleistiftzeichnung mit Tinte und Farbstift, erstellt als Projektionsbildzeichnung für die Beobachtungen in Locarno-Monti auf dem Vordruck der Eidgenössischen Sternwarte Zürich. Instrument: Zeiss-Coudé-Refraktor mit 15 cm Öffnung und 225 cm Brennweite.
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
description: ETH-Bibliothek
SimBricks: End-to-End Network System Evaluation with Modular Simulation
Creators: name: Li, Hejing
name: Li, Jialin
name: Kaufmann, Antoine
Publisher: name: arXiv
Year: 2020
Subjects: subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: Networking and Internet Architecture (cs.NI)
subject: Operating Systems (cs.OS)
subject: FOS: Computer and information sciences

description: Full system "end-to-end" measurements in physical testbeds are the gold standard for network systems evaluation but are often not feasible. When physical testbeds are not available we frequently turn to simulation for evaluation. Unfortunately, existing simulators are insufficient for end-to-end evaluation, as they either cannot simulate all components, or simulate them with inadequate detail. We address this through modular simulation, flexibly combining and connecting multiple existing simulators for different components, including processor and memory, devices, and network, into virtual end-to-end testbeds tuned for each use-case. Our architecture, SimBricks, combines well-defined component interfaces for extensibility and modularity, efficient communication channels for local and distributed simulation, and a co-designed efficient synchronization mechanism for accurate timing across simulators. We demonstrate SimBricks scales to 1000 simulated hosts, each running a full software stack including Linux, and that it can simulate testbeds with existing NIC and switch RTL implementations. We also reproduce key findings from prior work in congestion control, NIC architecture, and in-network computing in SimBricks.
description: 17 pages, 13 figures, appeared in In Proceedings of ACM SIGCOMM 2022 Conference (SIGCOMM '22), August 22-26, 2022, Amsterdam, Netherlands
Sonnenfleckenzeichnung Nr. 5744.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 16.03.1958, erstellt von Sergio Cortesi, Sonnenobservatorium Specola Solare Ticinese in Locarno
Creators: name: Observatorium Specola Solare Ticinese Locarno (1957 bis 1980 Teil der Eidgenössischen Sternwarte der ETH Zürich)
Publisher: name: [s.n.]
Year: 1958

description: Bleistiftzeichnung mit Tinte und Farbstift, erstellt als Projektionsbildzeichnung für die Beobachtungen in Locarno-Monti auf dem Vordruck der Eidgenössischen Sternwarte Zürich. Instrument: Zeiss-Coudé-Refraktor mit 15 cm Öffnung und 225 cm Brennweite.
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
description: ETH-Bibliothek
Electrical Control of Surface Acoustic Waves
Creators: name: Shao, Linbo
name: Zhu, Di
name: Colangelo, Marco
name: Lee, Dae Hun
name: Sinclair, Neil
name: Hu, Yaowen
name: Rakich, Peter T.
name: Lai, Keji
name: Berggren, Karl K.
name: Loncar, Marko
Publisher: name: arXiv
Year: 2021
Subjects: subject: Applied Physics (physics.app-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Acoustic waves at microwave frequencies have been widely used in wireless communication and recently emerged as versatile information carriers in quantum applications. However, most acoustic devices are passive components, and dynamic control of acoustic waves in a low-loss and scalable manner remains an outstanding challenge, which hinders the development of phononic integrated circuits. Here we demonstrate electrical control of traveling acoustic waves on an integrated lithium niobate platform at both room and millikelvin temperatures. We modulate the phase and amplitude of the acoustic waves and demonstrate an acoustic frequency shifter by serrodyne phase modulation. Furthermore, we show reconfigurable nonreciprocal modulation by tailoring the phase matching between acoustic and quasi-traveling electric fields. Our scalable electro-acoustic platform comprises the fundamental elements for arbitrary acoustic signal processing and manipulation of phononic quantum information.