cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Exploring the Possibilities of Online Learning Experiences
Creators: Yang, Chia-ling
Publisher: name: Columbia University
Year: 2020
Subjects: Educational technology
Educational psychology
Web-based instruction
Classroom environment--Psychological aspects
Classroom environment--Social aspects

description: This reflective study, which explored how students learn in an online setting, involved an initial sample of 588 students who have taken the Health Education for Teachers course from fall 2013 to spring 2018 at Teachers College. A survey featuring open-ended questions were administered by email to the students, among whom 57 returned their questionnaires in June 2019. Of these participants, six agreed to be interviewed face to face or via Skype. The semi-structured interviews were conducted in July and August 2019, but when necessary, follow-up questions were asked in September and October that year. Professor Katherine Roberts, the instructor of the course, was also interviewed. The results showed that the students did not consider online discussions or email correspondence as interactions and desired more human exchanges. They decided on an online course for convenience and flexibility, but had they been given a choice, more of them would have opted for face-to-face settings. The themes emerging from the interview data were the necessity of flexibility and convenience rather than choice, the belief that flexibility is not beneficial to studying, and the difficulty of having a social presence. In recounting their learning experiences, the most memorable moments recalled by the students were places they have been to and people with whom they interacted. The interview with Professor Roberts revealed the difficulty of evaluating student progress in an online context and the importance of technical support from the institution. This research explored the validity of online communities, illuminated the significance of phatic communication, raised questions about educational costs, and identified the need for technical assistance from institutions. The findings suggested that instead of building an online community, which can rarely exist, educators should incorporate local community participation into educational programs. Finally, when institutions want to offer online courses, they should do so for pedagogical reasons and not solely for income. Educators need to continue exploring learning possibilities in both online and face-to-face avenues.
Off-diagonal cosmological solutions in emergent gravity theories and Grigory Perelman entropy for geometric flows
Creators: name: Vacaru, Sergiu I.
name: Veliev, Elşen Veli
name: Bubuianu, Laurenţiu
Publisher: name: arXiv
Year: 2019
Subjects: subject: General Physics (physics.gen-ph)
subject: FOS: Physical sciences
subject: 53C44, 53C50, 53C80, 82D99, 83C15, 83C55, 83C99, 83D99, 35Q75, 37J60, 37D35

description: We develop an approach to the theory of relativistic geometric flows and emergent gravity defined by entropy functionals and related statistical thermodynamics models. Nonholonomic deformations of G. Perelman's functionals and related entropic values are used for deriving relativistic geometric evolution flow equations. For self-similar configurations, such equations describe generalized Ricci solitons defining modified Einstein equations. We analyze possible connections between relativistic models of nonholonomic Ricci flows and emergent modified gravity theories. We prove that corresponding systems of nonlinear partial differential equations, PDEs, for entropic flows and modified gravity possess certain general decoupling and integration properties. There are constructed new classes of exact and parametric solutions for nonstationary configurations and locally anisotropic cosmological metrics in modified gravity theories and general relativity. Such solutions describe scenarios of nonlinear geometric evolution and gravitational and matter field dynamics with pattern-forming and quasiperiodic structure and various space quasicrystal and deformed spacetime crystal models. We analyze new classes of generic off-diagonal solutions for entropic gravity theories and show how such solutions can be used for explaining structure formation in modern cosmology. Finally, we speculate why the approaches with Perelman-Lyapunov type functionals are more general or complementary to the constructions elaborated using the concept of Bekenstein-Hawking entropy.
description: accepted to EPJC; latex2e 11pt, 35 pages with a table of contents; v3 is substantially modified with a new title and a new co-author
A Novel Terabit Grid-of-Beam Optical Wireless Multi-User Access Network with Beam Clustering
Creators: name: Kazemi, Hossein
name: Sarbazi, Elham
name: Crisp, Michael
name: El-Gorashi, Taisir E. H.
name: Elmirghani, Jaafar M. H.
name: Penty, Richard V.
name: White, Ian H.
name: Safari, Majid
name: Haas, Harald
Publisher: name: arXiv
Year: 2024
Subjects: subject: Signal Processing (eess.SP)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: In this paper, we put forward a proof of concept for sixth generation (6G) Terabit infrared (IR) laser-based indoor optical wireless networks. We propose a novel double-tier access point (AP) architecture based on an array of arrays of vertical cavity surface emitting lasers (VCSELs) to provide a seamless grid-of-beam coverage with multi-Gb/s per beam. We present systematic design and thorough analytical modeling of the AP architecture, which are then applied to downlink system modeling using non-imaging angle diversity receivers (ADRs). We propose static beam clustering with coordinated multi-beam joint transmission (CoMB-JT) for network interference management and devise various clustering strategies to address inter-beam interference (IBI) and inter-cluster interference (ICI). Non-orthogonal multiple access (NOMA) and orthogonal frequency division multiple access (OFDMA) schemes are also adopted to handle intra-cluster interference, and the resulting signal-to-interference-plus-noise ratio (SINR) and achievable data rate are derived. The network performance is studied in terms of spatial distributions and statistics of the downlink SINR and data rate through extensive computer simulations. The results demonstrate that data rates up to 15 Gb/s are achieved within the coverage area and a properly devised clustering strikes a balance between the sum rate and fairness depending on the number of users.
description: Author Accepted Manuscript (16 pages, 14 figures, 1 table)
title: Epilobium fleischeri
title: Fleischers Weidenröschen (Epilobium fleischeri)
titleType: AlternativeTitle
Creators: name: Schulz, Herbert
Publisher: name: Universitätsbibliothek Braunschweig
Year: 2006
Subjects: subject: Diasammlung Herbert Schulz
subject: 580

description: Enthält 12 Bilder des Fleischerschen Weidenröschens.
Set-Encoder: Permutation-Invariant Inter-Passage Attention for Listwise Passage Re-Ranking with Cross-Encoders
Creators: name: Schlatt, Ferdinand
name: Fröbe, Maik
name: Scells, Harrisen
name: Zhuang, Shengyao
name: Koopman, Bevan
name: Zuccon, Guido
name: Stein, Benno
name: Potthast, Martin
name: Hagen, Matthias
Publisher: name: arXiv
Year: 2024
Subjects: subject: Information Retrieval (cs.IR)
subject: FOS: Computer and information sciences

description: Existing cross-encoder models can be categorized as pointwise, pairwise, or listwise. Pairwise and listwise models allow passage interactions, which typically makes them more effective than pointwise models but less efficient and less robust to input passage order permutations. To enable efficient permutation-invariant passage interactions during re-ranking, we propose a new cross-encoder architecture with inter-passage attention: the Set-Encoder. In experiments on TREC Deep Learning and TIREx, the Set-Encoder is as effective as state-of-the-art listwise models while being more efficient and invariant to input passage order permutations. Compared to pointwise models, the Set-Encoder is particularly more effective when considering inter-passage information, such as novelty, and retains its advantageous properties compared to other listwise models. Our code is publicly available at https://github.com/webis-de/ECIR-25.
description: Accepted at ECIR'25
Algorithm Unfolding for Block-sparse and MMV Problems with Reduced Training Overhead
Creators: name: Hauffen, Jan Christian
name: Jung, Peter
name: Mücke, Nicole
Publisher: name: arXiv
Year: 2022
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: In this paper we consider algorithm unfolding for the Multiple Measurement Vector (MMV) problem in the case where only few training samples are available. Algorithm unfolding has been shown to empirically speed-up in a data-driven way the convergence of various classical iterative algorithms but for supervised learning it is important to achieve this with minimal training data. For this we consider learned block iterative shrinkage thresholding algorithm (LBISTA) under different training strategies. To approach almost data-free optimization at minimal training overhead the number of trainable parameters for algorithm unfolding has to be substantially reduced. We therefore explicitly propose a reduced-size network architecture based on the Kronecker structure imposed by the MMV observation model and present the corresponding theory in this context. To ensure proper generalization, we then extend the analytic weight approach by Lui et al to LBISTA and the MMV setting. Rigorous theoretical guarantees and convergence results are stated for this case. We show that the network weights can be computed by solving an explicit equation at the reduced MMV dimensions which also admits a closed-form solution. Towards more practical problems, we then consider convolutional observation models and show that the proposed architecture and the analytical weight computation can be further simplified and thus open new directions for convolutional neural networks. Finally, we evaluate the unfolded algorithms in numerical experiments and discuss connections to other sparse recovering algorithms.
Theory of high-gain twin-beam generation in waveguides: from Maxwell's equations to efficient simulation
Creators: name: Quesada, Nicolás
name: Triginer, Gil
name: Vidrighin, Mihai D.
name: Sipe, J. E.
Publisher: name: arXiv
Year: 2019
Subjects: subject: Quantum Physics (quant-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We provide an efficient method for the calculation of high-gain, twin-beam generation in waveguides derived from a canonical treatment of Maxwell's equations. Equations of motion are derived that naturally accommodate photon generation via spontaneous parametric down-conversion (SPDC) or spontaneous four-wave mixing (SFWM), and also include the effects of both self-phase modulation (SPM) of the pump, and of cross-phase modulation(XPM) of the twin beams by the pump. The equations we solve involve fields that evolve in space and are labelled by a frequency. We provide a proof that these fields satisfy bonafide commutation relations, and that in the distant past and future they reduce to standard time-evolving Heisenberg operators. Having solved for the input-output relations of these Heisenberg operators we also show how to construct the ket describing the quantum state of the twin-beams. Finally, we consider the example of high-gain SPDC in a waveguide with a flat nonlinearity profile, for which our approach provides an explicit solution that requires only a single matrix exponentiation.
title: Epilobium anagallidifolium
title: Gauchheilblättriges Weidenröschen (Epilobium anagallidifolium)
titleType: AlternativeTitle
Creators: name: Schulz, Herbert
Publisher: name: Universitätsbibliothek Braunschweig
Year: 2006
Subjects: subject: Alpen-Weidenröschen
subject: Epilobium alpinum
subject: Diasammlung Herbert Schulz
subject: 580

description: Enthält 12 Bilder des Gauchheilblättrigen Weidenröschens.
Supplemental data: Discussion
Creators: name: Sanjna Banerjee
name: Shrey Grover
name: Suhas Ganesh
name: Devarajan Sridharan
Publisher: name: figshare
Year: 2019
Subjects: Neuroscience

description: Supplemental data: Discussion section on “Distinction between response bias in 2-AFC tasks and choice bias in m-ADC tasks.
title: Epilobium alpestre
title: Quirlblättriges Weidenröschen (Epilobium alpestre)
titleType: AlternativeTitle
Creators: name: Schulz, Herbert
Publisher: name: Universitätsbibliothek Braunschweig
Year: 2006
Subjects: subject: Diasammlung Herbert Schulz
subject: 580

description: Enthält 7 Bilder des Quirlblättrigen Weidenröschens.
Effective aspect ratio of helices in shear flow
Creators: name: Rost, Brian W.
name: Stimatze, Justin T.
name: Egolf, David A.
name: Urbach, Jeffrey S.
Publisher: name: arXiv
Year: 2019
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We report the results of simulations of rigid colloidal helices suspended in a shear flow, using dissipative particle dynamics for a coarse-grained representation of the suspending fluid, as well as deterministic trajectories of non-Brownian helices calculated from the resistance tensor derived under the slender-body approximation. The shear flow produces nonuniform rotation of the helices, similarly to other high aspect ratio particles, such that more elongated helices spend more time aligned with the fluid velocity. We introduce a geometric effective aspect ratio calculated directly from the helix geometry and a dynamical effective aspect ratio derived from the trajectories of the particles and find that the two effective aspect ratios are approximately equal over the entire parameter range tested. We also describe observed transient deflections of the helical axis into the vorticity direction that can occur when the helix is rotating through the gradient direction and that depend on the rotation of the helix about its axis.
description: 9 pages, 8 figures. Supplements include interactive Mathematica notebook and static PDF version
Addendum: Chaos around a Hénon-Heiles-Inspired Exact Perturbation of a Black Hole
Creators: name: Vieira, Werner M.
name: Letelier, Patricio S.
Publisher: name: arXiv
Year: 1996
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: We find that the model of a black hole plus an exterior halo of quadrupoles and octopoles recently proposed by us is more chaotic than previously detected. In fact, the quadrupolar component gives rise also to a chaotic behavior, found after further numerical search. This fact reinforces even more the role of chaos in relativistic core--halo models.
description: 6 pages, REVTEX, two more references added, slight change in the figure scale
title: Epilobium nutans
title: Nickendes Weidenröschen (Epilobium nutans)
titleType: AlternativeTitle
Creators: name: Schulz, Herbert
Publisher: name: Universitätsbibliothek Braunschweig
Year: 2006
Subjects: subject: Diasammlung Herbert Schulz
subject: 580

description: Enthält 3 Bilder des Nickenden Weidenröschens.
Homologie et cohomologie de Hochschild de certaines algebres polynomiales classiques et quantiques
Creators: name: Richard, Lionel
Publisher: name: arXiv
Year: 2002
Subjects: subject: Quantum Algebra (math.QA)
subject: FOS: Mathematics
subject: 16E40,16S36,16S32,16W35

description: We study Hochschild homology and cohomology for some polynomial algebras mixing both ``classical'' relations ($XY-YX=1$) and ``quantum'' relations ($XY=łYX$). More specifically, we prove that the algebra of differential operators on any quantum affine space (quantum Weyl algebra) have the same Hochschild homology, and satisfy the same duality relation, as the classical Weyl algebra does.
description: 41 pages, article in french
Spacetime positive mass theorems for initial data sets with noncompact boundary
Creators: name: Almaraz, Sergio
name: de Lima, Levi Lopes
name: Mari, Luciano
Publisher: name: arXiv
Year: 2019
Subjects: subject: Differential Geometry (math.DG)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: In this paper, we define an energy-momentum vector at the spatial infinity of either asymptotically flat or asymptotically hyperbolic initial data sets carrying a non-compact boundary. Under suitable dominant energy conditions (DECs) imposed both on the interior and along the boundary, we prove the corresponding positive mass inequalities under the assumption that the underlying manifold is spin. In the asymptotically flat case, we also prove a rigidity statement when the energy-momentum vector is lightlike. Our treatment aims to underline both the common features and the differences between the asymptotically Euclidean and hyperbolic settings, especially regarding the boundary DECs.
description: 41 pages. Final version. Int. Math. Res. Notices 2020
title: Epilobium spec.
title: Weidenröschen (Epilobium spec.)
titleType: AlternativeTitle
Creators: name: Schulz, Herbert
Publisher: name: Universitätsbibliothek Braunschweig
Year: 2006
Subjects: subject: Diasammlung Herbert Schulz
subject: 580

description: Enthält 5 Bilder des Weidenröschens.
Stoner ferromagnetism in low-angle twisted bilayer graphene at three-quarters filling
Creators: name: Vidarte, Kevin J. U.
name: Riffo, Felipe Pérez
name: Morell, Eric Suárez
name: Lewenkopf, Caio
Publisher: name: arXiv
Year: 2024
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We present a theoretical investigation of the magnetic properties exhibited by twisted bilayer graphene (TBG) systems with small twist angles, where the appearance of flat minibands strongly enhances electron-electron interaction effects. We show that, at three-quarters filling of the conduction miniband, the Stoner mechanism induces a ferromagnetic polarization in the AA-stacking regions, which aligns with recent experimental observations. Our approach models the electronic properties by a tight-binding Hamiltonian combined with a Hubbard mean-field interaction term. We employ a real-space recursion technique to self-consistently calculate the system's local density of states and use our method to investigate the magnetic properties of small-angle TBG at three-quarters filling. The recursion method's $O({\cal N})$ efficiency makes it possible to address extremely large superlattices through a full real-space approach. We validate our procedure by comparing it with mean-field momentum-space calculations from the literature, which identify a magnetic phase in charge-neutral TBGs.
Exploring the Teaching Approaches Utilized by Educators of Returning Adult Students on Satellite Campuses and Community College Campuses: To What Extent Do Faculty Change Their Teaching Approaches to Meet the Needs of the Adult Learner?
Creators: Allen, Antija M.
Publisher: name: Columbia University
Year: 2018
Subjects: Adult education
Education, Higher
Adult education teachers
College branch campuses

description: There is a wealth of literature that provides faculty with effective teaching practices for educating returning adult students. Most of the literature focuses on online classes/institutions, community colleges, or the main campuses of four-year institutions. There is little to no literature, which explains what is actually taking place in the classroom on satellite campuses (also known as branch campuses, which consist almost entirely of returning adult students) of four-year institutions. With the projection of a continued increase in the number of returning adult students, it was important that this problem was addressed.
      Through in-depth interviews, the following was explored with seventeen Behavioral Science faculty: the unique challenges faced by faculty on satellite campuses, perceptions of returning adult students, whether faculty changed their teaching approaches with returning adult students, the teaching approaches utilized and if those teaching approaches were aligned with adult learning principles.
      The findings indicated that the satellite campus environment is unique as far as the student population and skills required to navigate the various difficulties one might encounter as a faculty member. Faculty recognize the differences between traditional and returning adult students. They are conscious of the challenges that their returning adult students face and modify their teaching approaches in order to meet their needs. And regardless of how faculty learn how to adapt to the needs of the returning adult students and no matter what principles guide their thinking, faculty try to meet their students’ needs. Additionally, whether faculty utilize formal course evaluations or gather feedback informally, feedback from students in any form hold value and can assist faculty in determining how to best modify their teaching approaches.
Additional file 22 of Resequencing of 388 cassava accessions identifies valuable loci and selection for variation in heterozygosity
Creators: name: Hu, Wei
name: Ji, Changmian
name: Liang, Zhe
name: Ye, Jianqiu
name: Ou, Wenjun
name: Ding, Zehong
name: Zhou, Gang
name: Tie, Weiwei
name: Yan, Yan
name: Yang, Jinghao
name: Ma, Liming
name: Yang, Xiaoying
name: Wei, Yunxie
name: Jin, Zhiqiang
name: Xie, Jianghui
name: Peng, Ming
name: Wang, Wenquan
name: Guo, Anping
name: Xu, Biyu
name: Guo, Jianchun
name: Chen, Songbi
name: Wang, Mingcheng
name: Zhou, Yang
name: Li, Xiaolong
name: Li, Ruoxi
name: Xiao, Xinhui
name: Wan, Zhongqing
name: An, Feifei
name: Zhang, Jie
name: Leng, Qingyun
name: Li, Yin
name: Shi, Haitao
name: Ming, Ray
name: Li, Kaimian
Publisher: name: figshare
Year: 2021
Subjects: subject: Genetics
subject: FOS: Biological sciences

description: Additional file 22: Fig. S1-S11. Fig. S1. Phylogeny of 388 cassava accessions generated using the neighbor-joining tree method with genome-wide SNPs. Fig S2. Linkage disequilibrium (LD) decay for different groups. Fig. S3. Manhattan plots for GWAS analysis of cassava agronomic traits. Fig. S4. Manhattan plots of two repeatedly observed MTAs for stem height and storage root number per plant. Fig S5. Comparison of SR epidermal types based on the non-synonymous SNPs in Sc10g012040. Fig. S6. Comparison of SR epidermal types based on the non-synonymous SNPs in Sc10g012050. Fig. S7. GWAS identification of Sc02g008280 as a candidate gene for SR endothelial color on chromosome 2. Fig. S8. Expression of candidate genes from GWAS analysis in different tissues and stages of storage root development.Fig. S9. Identification and screening of heterozygous blocks with high frequency in cultivars. Fig. S10. Transient overexpression and silencing of MeTIR1 affect starch content in leaves of four cassava cultivars (F1015, R72, 4363 and Baodao9-1).Fig. S11. Photos of cassava leaves transformed with pCAMBIA1304 (vector control, VC1), pCAMBIA1304::MeAHL17 (OE), pTRV (vector control, VC2) or pTRV::MeAHL17 (RNAi) in four cultivars at 0 and 6 days post inoculation.
title: Epilobium ciliatum
title: Drüsiges Weidenröschen (Epilobium ciliatum)
titleType: AlternativeTitle
Creators: name: Schulz, Herbert
Publisher: name: Universitätsbibliothek Braunschweig
Year: 2006
Subjects: subject: Epilobium adenocaule
subject: Diasammlung Herbert Schulz
subject: 580

description: Enthält 11 Bilder des Drüsigen Weidenröschens.
Nonvolatile Electrochemical Random-Access Memory Under Short Circuit
Creators: name: Kim, Diana
name: Watkins, Virgil
name: Cline, Laszlo
name: Li, Jingxian
name: Sun, Kai
name: Sugar, Joshua D.
name: Fuller, Elliot J.
name: Talin, A. Alec
name: Li, Yiyang
Publisher: name: arXiv
Year: 2022
Subjects: subject: Emerging Technologies (cs.ET)
subject: FOS: Computer and information sciences

description: Electrochemical random-access memory (ECRAM) is a recently developed and highly promising analog resistive memory element for in-memory computing. One longstanding challenge of ECRAM is attaining retention time beyond a few hours. This short retention has precluded ECRAM from being considered for inference classification in deep neural networks, which is likely the largest opportunity for in-memory computing. In this work, we develop an ECRAM cell with orders of magnitude longer retention than previously achieved, and which we anticipate to exceed 10 years at 85C. We hypothesize that the origin of this exceptional retention is phase separation, which enables the formation of multiple effectively equilibrium resistance states. This work highlights the promises and opportunities to use phase separation to yield ECRAM cells with exceptionally long, and potentially permanent, retention times.
description: 14 pages, 4 figures
Dirichlet problems associated to abstract nonlocal space-time differential operators
Creators: name: Willems, Joshua
Publisher: name: arXiv
Year: 2024
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics
subject: 35R11, 35E15 (Primary) 47D06, 47A60 (Secondary)

description: Let the abstract fractional space-time operator $(\partial_t + A)^s$ be given, where $s \in (0,\infty)$ and $-A \colon \mathsf{D}(A) \subseteq X \to X$ is a linear operator generating a uniformly bounded strongly measurable semigroup $(S(t))_{t\ge0}$ on a complex Banach space $X$. We consider the corresponding Dirichlet problem of finding a function $u \colon \mathbb{R} \to X$ such that $(\partial_t + A)^s u(t) = 0$ on $(t_0, \infty)$ and $u(t) = g(t)$ on $(-\infty, t_0]$, for given $t_0 \in \mathbb{R}$ and $g \colon (-\infty,t_0] \to X$. We define the concept of $L^p$-solutions, to which we associate a mild solution formula which expresses $u$ in terms of $g$ and $(S(t))_{t\ge0}$ and generalizes the well-known variation of constants formula for the mild solution to the abstract Cauchy problem $u' + Au = 0$ on $(t_0, \infty)$ with $u(t_0) = x \in \overline{\mathsf{D}(A)}$. Moreover, we include a comparison to analogous solution concepts arising from Riemann-Liouville and Caputo type initial value problems.
description: 25 pages
Two applications of instanton numbers
Creators: name: Gasparim, Elizabeth
Publisher: name: arXiv
Year: 2002
Subjects: subject: Algebraic Geometry (math.AG)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 14J60; 14H20

description: The two applications are: 1. sometimes instanton numbers stratify moduli of bundles better than Chern numbers. 2. sometimes instanton numbers distinguish singularities better than the classical numerical invariants.
On some Properties of Generalized Tribonacci Spinors
Creators: name: Cerda-Morales, Gamaliel
Publisher: name: arXiv
Year: 2024
Subjects: subject: General Mathematics (math.GM)
subject: FOS: Mathematics
subject: 11B39, 15A66, 11R52

description: Spinors are used in physics quite extensively. The goal of this study is also the spinor structure lying in the basis of the quaternion algebra. In this paper, first, we have introduced spinors mathematically. Then, we have defined Tribonacci spinors using the generalized Tribonacci quaternions. Later, we have established the structure of algebra for these spinors. Finally, we have proved some important formulas such as Binet and Cassini-like formulas which are given for some series of numbers in mathematics for Tribonacci spinors.
description: 12 pages
Exploring the String Landscape: The Dynamics, Statistics, and Cosmology of Parallel Worlds
Creators: Ahlqvist, Stein Pontus
Publisher: name: Columbia University
Year: 2013
Subjects: Physics

description: This dissertation explores various facets of the low-energy solutions in string theory known as the string landscape. Three separate questions are addressed - the tunneling dynamics between these vacua, the statistics of their location in moduli space, and the potential realization of slow-roll inflation in the flux potentials generated in string theory. We find that the tunneling transitions that occur between a certain class of supersymmetric vacua related to each other via monodromies around the conifold point are sensitive to the details of warping in the near-conifold regime. We also study the impact of warping on the distribution of vacua near the conifold and determine that while previous work has concluded that the conifold point acts as an accumulation point for vacua, warping highly dilutes the distribution in precisely this regime. Finally we investigate a novel form of inflation dubbed spiral inflation to see if it can be realized near the conifold point. We conclude that for our particular models, spiral inflation seems to rely on a de Sitter-like vacuum energy. As a result, whenever spiral inflation is realized, the inflation is actually driven by a vacuum energy.
title: Carex atrata
title: Schwarze Segge (Carex atrata)
titleType: AlternativeTitle
Creators: name: Schulz, Herbert
Publisher: name: Universitätsbibliothek Braunschweig
Year: 2006
Subjects: subject: Diasammlung Herbert Schulz
subject: 580

description: Enthält 17 Bilder der Schwarzen Segge.
Additional file 23 of Resequencing of 388 cassava accessions identifies valuable loci and selection for variation in heterozygosity
Creators: name: Hu, Wei
name: Ji, Changmian
name: Liang, Zhe
name: Ye, Jianqiu
name: Ou, Wenjun
name: Ding, Zehong
name: Zhou, Gang
name: Tie, Weiwei
name: Yan, Yan
name: Yang, Jinghao
name: Ma, Liming
name: Yang, Xiaoying
name: Wei, Yunxie
name: Jin, Zhiqiang
name: Xie, Jianghui
name: Peng, Ming
name: Wang, Wenquan
name: Guo, Anping
name: Xu, Biyu
name: Guo, Jianchun
name: Chen, Songbi
name: Wang, Mingcheng
name: Zhou, Yang
name: Li, Xiaolong
name: Li, Ruoxi
name: Xiao, Xinhui
name: Wan, Zhongqing
name: An, Feifei
name: Zhang, Jie
name: Leng, Qingyun
name: Li, Yin
name: Shi, Haitao
name: Ming, Ray
name: Li, Kaimian
Publisher: name: figshare
Year: 2021
Subjects: subject: Genetics
subject: FOS: Biological sciences

description: Additional file 23. Review history.
title: Carex norvegica
title: Norwegische Segge (Carex norvegica)
titleType: AlternativeTitle
Creators: name: Schulz, Herbert
Publisher: name: Universitätsbibliothek Braunschweig
Year: 2006
Subjects: subject: Diasammlung Herbert Schulz
subject: 580

description: Enthält 4 Bilder der Norwegischen Segge.
Ilex antiquorum Doweld 2022, nom. nov.
Creators: name: Doweld, Alexander B.
Publisher: name: Zenodo
Year: 2022
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Magnoliopsida
Aquifoliales
Aquifoliaceae
Ilex
Ilex antiquorum

description: Ilex antiquorum Doweld, nom. nov.
 ≡ Ilex antiqua Knobloch & Mai (1986: 112) non Ilex antiqua Heer (1882: 97).
 Type:—[fossil fruits (endocarps)] GERMANY. Saxony-Anhalt, Eisleben (holotype, #8494, Museum für Naturkunde, Berlin, Germany).
 Eponymy:—From antiquorum, most ancient.
 Occurrence:—Upper Cretaceous (Maastrichtian); Europe.
IFPNI: B33A6DAE-E2BA-E60B-8506-0ACF6D5814EA.
 Notes:—The fossil-species Ilex antiqua Knobloch & Mai (1986: 112) was based on the most anicent findings of Ilex -like fruits (endocarps) from the Upper Cretaceous (Maastrichtian) of Saxony-Anhalt, Germany. However, it is a later homonym of the fossil-species Ilex antiqua Heer (1882: 97), based on the fossil leaves of the Upper Cretaceous of Atanikerdluk [= Atanekerdluk], Southern Nuussuaq peninsula of Greenland. Therefore, a new replacement name is needed for the fossilspecies based on fruits.
description: Published as part of Doweld, Alexander B., 2022, New names of Ilex and Ilexpollenites (Aquifoliaceae), extant and fossil: Addendum Notulae Systematicae ad Palaeofloram Europaeam spectantes II. Aquifoliaceae, pp. 143-146 in Phytotaxa 531 (2) on page 143, DOI: 10.11646/phytotaxa.531.2.7, http://zenodo.org/record/5869344
title: Carex echinata
title: Igel-Segge (Carex echinata)
titleType: AlternativeTitle
Creators: name: Schulz, Herbert
Publisher: name: Universitätsbibliothek Braunschweig
Year: 2006
Subjects: subject: Stern-Segge
subject: Diasammlung Herbert Schulz
subject: 580

description: Enthält 5 Bilder der Igel-Segge.
Conditioning and Sampling in Variational Diffusion Models for Speech Super-Resolution
Creators: name: Yu, Chin-Yun
name: Yeh, Sung-Lin
name: Fazekas, György
name: Tang, Hao
Publisher: name: arXiv
Year: 2022
Subjects: subject: Audio and Speech Processing (eess.AS)
subject: Sound (cs.SD)
subject: Signal Processing (eess.SP)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences

description: Recently, diffusion models (DMs) have been increasingly used in audio processing tasks, including speech super-resolution (SR), which aims to restore high-frequency content given low-resolution speech utterances. This is commonly achieved by conditioning the network of noise predictor with low-resolution audio. In this paper, we propose a novel sampling algorithm that communicates the information of the low-resolution audio via the reverse sampling process of DMs. The proposed method can be a drop-in replacement for the vanilla sampling process and can significantly improve the performance of the existing works. Moreover, by coupling the proposed sampling method with an unconditional DM, i.e., a DM with no auxiliary inputs to its noise predictor, we can generalize it to a wide range of SR setups. We also attain state-of-the-art results on the VCTK Multi-Speaker benchmark with this novel formulation.
description: Published at ICASSP 2023
Ilex breddinii Doweld 2022, comb. nov.
Creators: name: Doweld, Alexander B.
Publisher: name: Zenodo
Year: 2022
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Magnoliopsida
Aquifoliales
Aquifoliaceae
Ilex
Ilex breddinii

description: Ilex breddinii (Weyland) Doweld, comb. nov.
 ≡ Kadsura breddinii Weyland (1934: 68) ≡ Symplociphyllum breddinii (Weyland) Juchniewicz (1975: 89, 124), comb. inval. (no basionym cited).
 Type:—[fossil leaves] Kreuzau, district of Düren, North Rhine-Westphalia, Germany (lectotype (designated by Palamarev & Petkova 1987: 33), Weyland Collection: MB.Pb.1981/0075, Museum für Naturkunde, Berlin, Germany).
 Occurrence:—Miocene; Europe.
IFPNI: 71995DC8-EBB9-F1EB-B03A-C5E70909FFE6.
 Notes:—The fossil-species Kadsura breddinii Weyland was re-studied by Ferguson (1971) who found that there is no similarity with extant species of Kadsura. Juchniewicz (1975) suggested that fossil-species might be transferred to fossilgenus Symplociphyllum, showing some resemblance with the leaves of extant Symplocos brandii Elm. However, this suggestion was not based on the study of the original materials of Weyland (1934), but based on the fossil remains from the different locality near Turów (Bogatynia, Poland). Since the lectotype of Kadsura breddinii is coming from Kreuzau, and has a similarity with extant Ilex (vide Ferguson, 1971), the fossil-species is re-combined to Ilex.
description: Published as part of Doweld, Alexander B., 2022, New names of Ilex and Ilexpollenites (Aquifoliaceae), extant and fossil: Addendum Notulae Systematicae ad Palaeofloram Europaeam spectantes II. Aquifoliaceae, pp. 143-146 in Phytotaxa 531 (2) on page 143, DOI: 10.11646/phytotaxa.531.2.7, http://zenodo.org/record/5869344
title: Carex curvula
title: Krumm-Segge (Carex curvula)
titleType: AlternativeTitle
Creators: name: Schulz, Herbert
Publisher: name: Universitätsbibliothek Braunschweig
Year: 2006
Subjects: subject: Diasammlung Herbert Schulz
subject: 580

description: Enthält 3 Bilder der Krumm-Segge.
Ladder relations for a class of matrix valued orthogonal polynomials
Creators: name: Deaño, Alfredo
name: Eijsvoogel, Bruno
name: Román, Pablo
Publisher: name: arXiv
Year: 2019
Subjects: subject: Classical Analysis and ODEs (math.CA)
subject: FOS: Mathematics

description: Using the theory introduced by Casper and Yakimov, we investigate the structure of algebras of differential and difference operators acting on matrix valued orthogonal polynomials (MVOPs) on $\mathbb{R}$, and we derive algebraic and differential relations for these MVOPs. A particular case of importance is that of MVOPs with respect to a matrix weight of the form $W(x)=e^{-v(x)}e^{xA} e^{xA^\ast}$ on the real line, where $v$ is a scalar polynomial of even degree with positive leading coefficient and $A$ is a constant matrix.
Neutrino Oscillations in a Quantum Processor
Creators: name: Argüelles, C. A.
name: Jones, B. J. P.
Publisher: name: arXiv
Year: 2019
Subjects: subject: Quantum Physics (quant-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Quantum computing technologies promise to revolutionize calculations in many areas of physics, chemistry, and data science. Their power is expected to be especially pronounced for problems where direct analogs of a quantum system under study can be encoded coherently within a quantum computer. A first step toward harnessing this power is to express the building blocks of known physical systems within the language of quantum gates and circuits. In this paper, we present a quantum calculation of an archetypal quantum system: neutrino oscillations. We define gate arrangements that implement the neutral lepton mixing operation and neutrino time evolution in two-, three-, and four-flavor systems. We then calculate oscillation probabilities by coherently preparing quantum states within the processor, time evolving them unitarily, and performing measurements in the flavor basis, with close analogy to the physical processes realized in neutrino oscillation experiments, finding excellent agreement with classical calculations. We provide recipes for modeling oscillation in the standard three-flavor paradigm as well as beyond-standard-model scenarios, including systems with sterile neutrinos, non-standard interactions, Lorentz symmetry violation, and anomalous decoherence.
description: 11 pages, 4 figures. Updated version to match the published version
Projections of Hopf braces
Creators: name: Vilaboa, José Manuel Fernández
name: Rodríguez, Ramón González
name: Pérez, Brais Ramos
name: Raposo, Ana Belén Rodríguez
Publisher: name: arXiv
Year: 2024
Subjects: subject: Rings and Algebras (math.RA)
subject: Category Theory (math.CT)
subject: FOS: Mathematics

description: This paper is devoted to the study of Hopf braces projections in a monoidal setting. Given a cocommutative Hopf brace ${\mathbb H}$ in a strict symmetric monoidal category ${\sf C}$, we define the braided monoidal category of left Yetter-Drinfeld modules over ${\mathbb H}$. For a Hopf brace ${\mathbb A}$ in this category, we introduce the concept of bosonizable Hopf brace and we prove that its bosonization ${\mathbb A}\blacktriangleright\hspace{-0.15cm}\blacktriangleleft {\mathbb H}$ is a new Hopf brace in ${\sf C}$ that gives rise to a projection of Hopf braces satisfying certain properties. Finally, taking these properties into account, we introduce the notions of v$_{i}$-strong projection over ${\mathbb H}$, $i=1,2,3,4$, and we prove that there is a categorical equivalence between the categories of bosonizable Hopf braces in the category of left Yetter-Drinfeld modules over ${\mathbb H}$ and the category of v$_{4}$-strong projections over ${\mathbb H}$.
title: Carex rostrata
title: Schnabel-Segge (Carex rostrata)
titleType: AlternativeTitle
Creators: name: Schulz, Herbert
Publisher: name: Universitätsbibliothek Braunschweig
Year: 2006
Subjects: subject: Diasammlung Herbert Schulz
subject: 580

description: Enthält 5 Bilder der Schnabel-Segge.
Additional file 1: of Post - effects of obstetric fistula in Uganda; a case study of fistula survivors in KITOVU mission hospital (MASAKA), Uganda
Creators: name: Bomboka, John Bosco
name: N-Mboowa, Mary Gorrethy
name: Nakilembe, Jennifer
Publisher: name: figshare
Year: 2019
Subjects: subject: Medicine
subject: Cell Biology
subject: Sociology
subject: FOS: Sociology
subject: Cancer
subject: 110309 Infectious Diseases
subject: FOS: Health sciences
subject: 60506 Virology
subject: FOS: Biological sciences

description: Interview guide - Post effects of Fistula among Fistula Survivors. (PDF 115 kb)
Additional file 2: of The effects of spinal manipulation on performance-related outcomes in healthy asymptomatic adult population: a systematic review of best evidence
Creators: name: Corso, Melissa
name: Mior, Silvano
name: Batley, Sarah
name: Tuff, Taylor
name: Silva-Oolup, Sophia Da
name: Howitt, Scott
name: Srbely, John
Publisher: name: figshare
Year: 2019
Subjects: subject: Medicine
subject: Sociology
subject: FOS: Sociology
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: Developmental Biology
subject: Science Policy

description: Appendix II. References for high risk of bias studies not included in this review. (DOCX 17 kb)
title: Carex hordeistichos
title: Gersten-Segge (Carex hordeistichos)
titleType: AlternativeTitle
Creators: name: Schulz, Herbert
Publisher: name: Universitätsbibliothek Braunschweig
Year: 2006
Subjects: subject: Diasammlung Herbert Schulz
subject: 580

description: Enthält 7 Bilder der Gersten-Segge.
Quantum Systems at The Brink
Creators: name: Hundertmark, Dirk
name: Jex, Michal
name: Lange, Markus
Publisher: name: arXiv
Year: 2022
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences
subject: 81Q05, 35Q40, 81V45

description: We present a method to calculate the asymptotic behavior of eigenfunctions of Schrödinger operators that also works at the threshold of the essential spectrum. It can be viewed as a higher order correction to the well-known WKB method which does need a safety distance to the essential spectrum. We illustrate its usefulness on examples of quantum particles in a potential well with a long-range repulsive term outside the well.
description: arXiv admin note: substantial text overlap with arXiv:2012.12748
title: Carex hirta
title: Behaarte Segge (Carex hirta)
titleType: AlternativeTitle
Creators: name: Schulz, Herbert
Publisher: name: Universitätsbibliothek Braunschweig
Year: 2006
Subjects: subject: Diasammlung Herbert Schulz
subject: 580

description: Enthält 15 Bilder der Behaarten Segge.
Antiresonance and Localization in Quantum Dynamics
Creators: name: Dana, I.
name: Eisenberg, E.
name: Shnerb, N.
Publisher: name: arXiv
Year: 1996
Subjects: subject: Condensed Matter (cond-mat)
subject: Chaotic Dynamics (nlin.CD)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The phenomenon of quantum antiresonance (QAR), i.e., exactly periodic recurrences in quantum dynamics, is studied in a large class of nonintegrable systems, the modulated kicked rotors (MKRs). It is shown that asymptotic exponential localization generally occurs for $η$ (a scaled $\hbar$) in the infinitesimal vicinity of QAR points $η_0$. The localization length $ξ_0$ is determined from the analytical properties of the kicking potential. This ``QAR-localization" is associated in some cases with an integrable limit of the corresponding classical systems. The MKR dynamical problem is mapped into pseudorandom tight-binding models, exhibiting dynamical localization (DL). By considering exactly-solvable cases, numerical evidence is given that QAR-localization is an excellent approximation to DL sufficiently close to QAR. The transition from QAR-localization to DL in a semiclassical regime, as $η$ is varied, is studied. It is shown that this transition takes place via a gradual reduction of the influence of the analyticity of the potential on the analyticity of the eigenstates, as the level of chaos is increased.
description: To appear in Physical Review E. 51 pre-print pages + 9 postscript figures
Ilex myricina Doweld 2022, nom. nov.
Creators: name: Doweld, Alexander B.
Publisher: name: Zenodo
Year: 2022
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Magnoliopsida
Aquifoliales
Aquifoliaceae
Ilex
Ilex myricina

description: Ilex myricina Doweld, nom. nov.
 ≡ Ilex myricoides Massalongo (1858: 110) non Ilex myricoides Kunth (1824: 71).
 Type:—[fossil leaves] ITALY. Senigallia, Marche region, province of Ancona (holotype, not found [lost]).
 Eponymy:—From Myrica L.
 Occurrence:—Upper Miocene (Messinian); Europe.
IFPNI: 11B0D654-7DF3-A192-32AD-54A92B72DBB5.
 Notes:—The fossil-species Ilex myricoides Massalongo (1858) was based on the fossil leaves from the Upper Miocene (Messinian) of Italy. However, it is a later homonym of the extant Ilex myricoides Kunth (1824). Therefore, a new replacement name is validated for the fossil-species.
description: Published as part of Doweld, Alexander B., 2022, New names of Ilex and Ilexpollenites (Aquifoliaceae), extant and fossil: Addendum Notulae Systematicae ad Palaeofloram Europaeam spectantes II. Aquifoliaceae, pp. 143-146 in Phytotaxa 531 (2) on page 144, DOI: 10.11646/phytotaxa.531.2.7, http://zenodo.org/record/5869344
Sensitivity bounds on heavy neutrino mixing $|U_{μN}|^2$ and $|U_{τN}|^2$ from LHCb upgrade
Creators: name: Cvetic, Gorazd
name: Kim, C. S.
Publisher: name: arXiv
Year: 2019
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Decays of heavy pseudoscalar mesons $B$, $B_c$, $B_s$ and $D_s$ at LHCb upgrade are considered, which produce either two equal sign muons or taus. In addition, we consider the analogous decays with opposite sign muons or taus. All these decays are considered to be mediated by a heavy on-shell neutrino $N$. Such decays of $B$ mesons, if not detected, will give in general stringent upper bounds on the heavy-light mixing parameter $|U_{μN}|^2$ as a function of the neutrino mass $M_N \sim 1$ GeV, principally due to the large expected number of produced mesons $B$. While some of the decays of the other mentioned mesons are attractive due to a weaker CKM-suppression, the expected produced number of such mesons is significantly smaller that that of $B$'s; therefore, the sensitivity bounds from such decays are in general comparable or less restrictive. When $τ$ pairs are produced, only two types of such decays are significant: $B^{\pm}, B_{c}^{\pm} \to τ^{\pm} τ^{\pm} π^{\mp}$ (and $τ^{\pm} τ^{\mp} π^{\pm}$), giving us stringent upper bounds on $|U_{τN}|^2$; the other decays with a pair of $τ$, such as $B^0 \to D^{(*)-} τ^+ τ^+ π^-$ (and $D^{(*)-} τ^+ τ^- π^+$), are prohibited or very suppressed by kinematics.
description: 13 pages, 4 figures; the paper is a continuation of our work arXiv:1705.09403; v4: improved legends in Fig.2
Correlation functions of the XXZ Heisenberg spin-1/2 chain in a magnetic field
Creators: name: Kitanine, N.
name: Maillet, J. M.
name: Terras, V.
Publisher: name: arXiv
Year: 1999
Subjects: subject: Mathematical Physics (math-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: High Energy Physics - Theory (hep-th)
subject: Quantum Algebra (math.QA)
subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Physical sciences
subject: FOS: Mathematics
subject: 82B23, 82B20, 81R50

description: Using the algebraic Bethe ansatz method, and the solution of the quantum inverse scattering problem for local spins, we obtain multiple integral representations of the $n$-point correlation functions of the XXZ Heisenberg spin-$1 \over 2$ chain in a constant magnetic field. For zero magnetic field, this result agrees, in both the massless and massive (anti-ferromagnetic) regimes, with the one obtained from the q-deformed KZ equations (massless regime) and the representation theory of the quantum affine algebra ${\cal U}_q (\hat{sl}_2)$ together with the corner transfer matrix approach (massive regime).
description: Latex2e, 26 pages