cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Constraints on order and disorder parameters in quantum spin chains
Creators: name: Levin, Michael
Publisher: name: arXiv
Year: 2019
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Mathematical Physics (math-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We derive general constraints on order and disorder parameters in Ising symmetric spin chains. Our main result is a theorem showing that every gapped, translationally invariant, Ising symmetric spin chain has either a nonzero order parameter or a nonzero disorder parameter. We also prove two more constraints on order and disorder parameters: (i) it is not possible for a gapped, Ising symmetric spin chain to have both a nonzero order parameter and a nonzero disorder parameter; and (ii) it is not possible for a spin chain of this kind to have a nonzero disorder parameter that is odd under the symmetry. These constraints have an interesting implication for self-dual Ising symmetric spin chains: every self-dual spin chain is either gapless or has a degenerate ground state in the thermodynamic limit. All of these constraints generalize to spin chains without translational symmetry. Our proofs rely on previously known bounds on entanglement and correlations in one dimensional systems, as well as the Fuchs-van de Graaf inequality from quantum information theory.
description: 28 pages, 2 figures, published version
Alepidea peduncularis A. Rich.
Creators: name: Zhou, Ya-Dong
name: Mwachala, Geoffrey
name: Hu, Guang-Wan
name: Wang, Qing-Feng
Publisher: name: Zenodo
Year: 2022
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Magnoliopsida
Apiales
Apiaceae
Alepidea
Alepidea peduncularis

description: Alepidea peduncularis Steud. ex A.Rich.  —
Habit: Herb.
Habitat: LMWF, LMDF, BZ, UMF, HZ; up to 3 600 m. Distribution: II.
 Voucher: Chogoria Roadhead, Alt. 3 211 m, 25 Jan. 2015, SAJIT 002838 (HIB).
References: Fries & Fries (1927a), Townsend (1989), Bussmann (1993, 1994), Agnew (2013).
description: Published as part of Zhou, Ya-Dong, Mwachala, Geoffrey, Hu, Guang-Wan & Wang, Qing-Feng, 2022, Annotated checklist of the vascular plants of Mount Kenya, East Africa, pp. 1-108 in Phytotaxa 546 (1) on page 99, DOI: 10.11646/phytotaxa.546.1.1, http://zenodo.org/record/6550464
Фур'є-спектри хаотичного аттрактора для неоднорідних систем, що описуються функціоналом вільної енергії, за умови існування інваріанта Ліфшиця
Creators: name: , Лозован
name: Сокульський
name: Свелеба
name: Катеринчук
name: Куньо
name: Карпа
name: Шмигельський
Publisher: name: Zenodo
Year: 2019
Subjects: Фазові портрети
Фур"є-спектри
Інформаційні технології
Рунге-Кутта 4-ого порядку
Математична модель

description: В. Лозован, В. Сокульського, С. Свелеба, І. Катеринчук, І. Куньо, І. Карпа, Я. Шмигельський // Фур'є-спектри хаотичного аттрактора для неоднорідних систем, що описуються функціоналом вільної енергії, за умови існування інваріанта Ліфшиця // Електроніка та інформаційні технології // IX-ої Українсько-польська науково - практична конференція 28–31 серпня 2017 р. // Львів – Чинадієво, Україна. С. 167-170. DOI: http://doi.org/10.5281/zenodo.3435473
For How Long Is It Possible To Quantum Compute?
Creators: name: Mucciolo, Eduardo
Publisher: name: The University of British Columbia
Year: 2016

description: One of the key problems in quantum information processing is to understand the physical limits to quantum computation. Several strategies have been proposed to attenuate errors caused by the interaction of the computer with its surrounding environment and quantum error correction (QEC) is likely the most versatile. A large effort has been devoted to proving that resilience can be achieved by concatenating QEC codes in logical structures. In our work we look into this question at a different angle: we provide an upper bound on the time available to computation given a certain computer, a QEC code, and a decohering environment. We consider a broad class of environments, including those where correlation effects can be induced by gapless modes. Our approach is based on a Hamiltonian formulation where we use coarse graining in time to derive an explicit quantum evolution operator for the logical qubits, taking into account the QEC code. We show that this evolution operator has the same form as that for the original physical qubits, except for a reduced coupling to the environment which can be evaluated systematically for a given geometry and QEC code structure. To quantify the effectiveness of QEC, we compute the trace distance between the real and ideal states of a logical qubit after an arbitrary number of QEC cycles. We derive expressions for the long-time trace distance for several for super-ohmic-, ohmic-, and sub-ohmic-like baths. Given a confidence threshold for the trace distance, we establish the maximum time available for computation in those three cases. This maximum time is controlled by an exponent related to the spatial dimensions and other characteristics of the computer and the environment. For the super-ohmic regime, we find that computation can continue indefinitely, while in the other regimes the maximum time depends strongly on the QEC code, on the number of logical qubits, and on the original environment-computer strength interaction.
Tenthredo nigroclypeata Mocsary 1909
Creators: name: Taeger, Andreas
Publisher: name: Zenodo
Year: 2013
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Tenthredinidae
Tenthredo
Tenthredo nigroclypeata

description: Tenthredo nigroclypeata Mocsáry, 1909
A junior subjective synonym of Tenthredo (Tenthredella) albopicta Puls, 1870. Synonymy by Enslin (1920).
TYPES. Tenthredo nigroclypeata Mocsáry, 1909: 38 –39. Syntype (s) Ƥ. Type locality: “Caucasus: Territorium Kubanense” [= Russia, Krasnodarskiy Kray]. 1 Ƥ syntype examined.
DISCUSSION. The examined syntype bears no locality label.
description: Published as part of Taeger, Andreas, 2013, The type specimens of Tenthredo Linnaeus, 1758 (Hymenoptera: Tenthredinidae) deposited in the Hungarian Natural History Museum, pp. 201-244 in Zootaxa 3626 (2) on page 223, DOI: 10.11646/zootaxa.3626.2.1, http://zenodo.org/record/248049
A trajectory-based framework for data-driven system analysis and control
Creators: name: Berberich, Julian
name: Allgöwer, Frank
Publisher: name: arXiv
Year: 2019
Subjects: subject: Systems and Control (eess.SY)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: The vector space of all input-output trajectories of a discrete-time linear time-invariant (LTI) system is spanned by time-shifts of a single measured trajectory, given that the respective input signal is persistently exciting. This fact, which was proven in the behavioral control framework, shows that a single measured trajectory can capture the full behavior of an LTI system and might therefore be used directly for system analysis and controller design, without explicitly identifying a model. In this paper, we translate the result from the behavioral context to the classical state-space control framework and we extend it to certain classes of nonlinear systems, which are linear in suitable input-output coordinates. Moreover, we show how this extension can be applied to the data-driven simulation problem, where we introduce kernel-methods to obtain a rich set of basis functions.
Data Cleaning Code; Cannabis and Depression in UKB
Creators: name: Hodgson, Karen
Publisher: name: figshare
Year: 2019
Subjects: subject: Genetics
subject: FOS: Biological sciences
subject: 111714 Mental Health
subject: FOS: Health sciences
subject: 110319 Psychiatry (incl. Psychotherapy)
subject: FOS: Clinical medicine

description: Code for deriving phenotypic and genetic data, as described in manuscript entitled "Cannabis use, depression and self-harm: phenotypic and genetic relationships."
Gravitational waves from binary systems in circular orbits: Convergence of a dressed multipole truncation
Creators: name: Leonard, Stephen W.
name: Poisson, Eric
Publisher: name: arXiv
Year: 1997
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The gravitational radiation originating from a compact binary system in circular orbit is usually expressed as an infinite sum over radiative multipole moments. In a slow-motion approximation, each multipole moment is then expressed as a post-Newtonian expansion in powers of v/c, the ratio of the orbital velocity to the speed of light. The bare multipole truncation of the radiation consists in keeping only the leading-order term in the post-Newtonian expansion of each moment, but summing over all the multipole moments. In the case of binary systems with small mass ratios, the bare multipole series was shown in a previous paper to converge for all values v/c < 2/e, where e is the base of natural logarithms. In this paper, we extend the analysis to a dressed multipole truncation of the radiation, in which the leading-order moments are corrected with terms of relative order (v/c)^2 and (v/c)^3. We find that the dressed multipole series converges also for all values v/c < 2/e, and that it coincides (within 1%) with the numerically ``exact'' results for v/c < 0.2.
description: 9 pages, ReVTeX, 1 postscript figure
The Effect of Explicit Teaching of Comprehension Strategies on Reading Comprehension in Elementary School
Creators: Atkins, James Grant
Publisher: name: Columbia University
Year: 2013
Subjects: Educational psychology
Reading

description: This study investigated the effect of explicit teaching of comprehension strategies on the comprehension performance of elementary school students. Two schools with similar demographics, including a significant proportion of students at risk for reading failure, participated in the study. One school utilized an explicit comprehension strategy instruction program while the other school utilized traditional comprehension programs. A quasi-experimental mixed methods design was employed; standardized and researcher-developed pretests and posttests were administered and observations were conducted over a two-year period. Analyses of covariance that treated the pretests as covariates resulted in significant differences between the schools on several measures, but the overall results did not favor either school. Significantly more instances of explicit instruction were demonstrated by teachers using the explicit program than teachers using the traditional programs. Differences in the number of instances of explicit instruction were most substantial during the student practice and feedback sections of the lessons. Correlations between teacher explicitness scores and student achievement scores and a comparison of the achievement scores of high-explicit and low-explicit teachers (regardless of the school's program) did not demonstrate a significant relationship between explicit instruction and student performance. However, teachers using the explicit program for their second year demonstrated more explicit instruction than teachers using the program for their first year. Students in the second-year teachers' classrooms demonstrated superior performance on a passage comprehension assessment compared to students in the first-year teachers' classrooms. Also, a comparison of the students who had been exposed to the explicit program for two consecutive years and the students who had been exposed to the traditional program for two consecutive years found that second-grade students exposed to the explicit program outperformed their counterparts on most assessments. These results did not indicate an overall relationship between teacher explicitness and student performance. The results do indicate, however, that an explicit comprehension program can result in more explicit instruction in the classroom and that instances of explicit instruction increase when teachers have more experience teaching such a program. Moreover, there is evidence that among experienced teachers, there is a positive relationship between teacher explicitness and student performance.
The approach to thermal equilibrium in quantized chaotic systems
Creators: name: Srednicki, Mark
Publisher: name: arXiv
Year: 1998
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: We consider many-body quantum systems that exhibit quantum chaos, in the sense that the observables of interest act on energy eigenstates like banded random matrices. We study the time-dependent expectation values of these observables, assuming that the system is in a definite (but arbitrary) pure quantum state. We induce a probability distribution for the expectation values by treating the zero of time as a uniformly distributed random variable. We show explicitly that if an observable has a nonequilibrium expectation value at some particular moment, then it is overwhelmingly likely to move towards equilibrium, both forwards and backwards in time. For deviations from equilibrium that are not much larger than a typical quantum or thermal fluctuation, we find that the time dependence of the move towards equilibrium is given by the Kubo correlation function, in agreement with Onsager's postulate. These results are independent of the details of the system's quantum state.
description: 15 pages, no figures; some arguments are clarified in the revised version
Cuaderno de Investigación 70 "Análisis de las cláusulas de género negociadas colectivamente en Chile: La igualdad que promueven y los derechos que reivindican"
Creators: name: Dirección del Trabajo
Publisher: name: Dirección del Trabajo de Chile
Year: 2024

description: Este estudio describe el tratamiento de medidas que contribuyen a la igualdad de género en los instrumentos colectivos vigentes en Chile. A partir de la revisión de 85 contratos y convenios suscritos por sindicatos de diferentes ramas de actividad económica, ofrece un amplio repertorio de cláusulas ordenadas temáticamente. Además, plantea recomendaciones para las dirigencias sindicales interesadas en promover la igualdad de género en el ámbito laboral.
description: This study examines the treatment of measures aimed at promoting gender equality within current collective bargaining instruments in Chile. Based on an analysis of 85 contracts and agreements negotiated by unions across various sectors of economic activity, it presents a comprehensive repertoire of thematically organized clauses. Furthermore, it offers a set of recommendations for union leaderships seeking to advance gender equality in the workplace.
Quantum phases and topological properties of interacting fermions in one-dimensional superlattices
Creators: name: Stenzel, Leo
name: Hayward, Andrew L. C.
name: Hubig, Claudius
name: Schollwöck, Ulrich
name: Heidrich-Meisner, Fabian
Publisher: name: arXiv
Year: 2019
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The realization of artificial gauge fields in ultracold atomic gases has opened up a path towards experimental studies of topological insulators and, as an ultimate goal, topological quantum matter in many-body systems. As an alternative to the direct implementation of two-dimensional lattice Hamiltonians that host the quantum Hall effect and its variants, topological charge-pumping experiments provide an additional avenue towards studying many-body systems. Here, we consider an interacting two-component gas of fermions realizing a family of one-dimensional superlattice Hamiltonians with onsite interactions and a unit cell of three sites, whose groundstates would be visited in an appropriately defined charge pump. First, we investigate the grandcanonical quantum phase diagram of individual Hamiltonians, focusing on insulating phases. For a certain commensurate filling, there is a sequence of phase transitions from a band insulator to other insulating phases (related to the physics of ionic Hubbard models) for some members of the manifold of Hamiltonians. Second, we compute the Chern numbers for the whole manifold in a many-body formulation and show that, related to the aforementioned quantum phase transitions, a topological transition results in a change of the value and sign of the Chern number. We provide both an intuitive and conceptual explanation and argue that these properties could be observed in quantum-gas experiments.
description: Added plotted data in json format as ancillary files
EOSC Pillar - Understanding the complex national and transnational environment
Creators: name: Le Franc, Yann
Publisher: name: Zenodo
Year: 2019
Subjects: EOSC
EOSC Pillar

description: Workshop abstract Are you establishing and integrating EOSC activities within your country? Do you need more support and opportunities to swap experiences on how embark on an EOSC action plan and how to reach out effectively to research communities about EOSC services? EOSC is gathering a huge momentum, and how this new research support network is established at national level is now at a critical stage, aspects of which are ongoing at a variety of implementation levels in some member states. While activities are different in each country, they could benefit from and be supported by alignment and good practice exchange. This workshop initiated by OpenAIRE, EOSC hub, and RDA-Europe will explore, with the support of the recently funded EOSCsecretariat.eu project, two areas of implementing EOSC at national level: Establishing national action plans and working with research groups and libraries to raise awareness about EOSC. In particular the workshop will touch on how to set up national action plans, set priorities especially at governance level, how to establish coordinated commitment from key stakeholders and to develop value added support and commitments for local infrastructure within the EOSC vision. Another aspect will be that of serving local research groups and how to target specific EOSC services to them, which is a challenging part of EOSC implementation. This session will be structured in a way that will showcase regional examples of EOSC implementation and good practice. The breakout sessions will be grouped at a regional level in order to identify common threads. This workshop will also provide a perfect setting to meet and network with national counterparts and help prepare and pave the way to set up EOSC and a better understanding of how EOSC works at the national level.
The Effect of Education on Earnings and Employment in the Informal Sector in South Africa
Creators: Yamasaki, Izumi
Publisher: name: Columbia University
Year: 2012
Subjects: Economics
Education and state
School management and organization

description: This dissertation analyzes the effects of schooling on earnings and employment in the informal private sector, compared with those in the public and formal private sectors, in South Africa. The estimations are conducted by race and gender as well to examine the difference between various subgroups. The research also examines the heterogeneity in returns to schooling. The returns to schooling are estimated using two-stage least squares with multinomial two-step selection corrections to control for both endogeneity of schooling and sector sample selection bias. Quantile regression and piecewise linear spline function methods were applied to deal with the heterogeneity of the returns to schooling. Moreover, the Blinder-Oaxaca decomposition method was conducted to explore the contribution of returns to schooling and educational endowments to wage differentials between sectors. To analyze the effects of schooling on the probability of employment in different sectors of the economy, multinomial logit and probit models were estimated. The instrumental variable probit model was also used to control for the endogeneity of schooling. Even after controlling for both endogeneity of schooling and sample selection bias, a significant difference was found in returns to schooling between the formal and informal private sectors. Returns to schooling in the formal private sector are higher than those in the informal private sector in general. These findings apply across race and gender, except for Whites and Asians whose sample size in the informal sector was too small. They were robust even after controlling for district, industry, and occupation, and using different definitions of the informal sector. Therefore, the dissertation concludes that formal private and informal private labor markets are segmented in terms of returns to schooling in South Africa. The study also showed a positive effect of schooling on employment in the public and formal private sectors versus employment in the informal private sector. The effect of schooling on employment in the formal private sector - when compared to that in the informal sector - was much stronger for females than males, except for Whites and Asians. The findings were robust after controlling for district and using different definitions of the informal sector.
Evanescent Gravitational Waves
Creators: name: Golat, Sebastian
name: Lim, Eugene A.
name: Rodríguez-Fortuño, Francisco J.
Publisher: name: arXiv
Year: 2019
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We describe the properties of evanescent gravitational waves (EGWs)---wave solutions of Einstein equations which decay exponentially in some direction while propagating in another. Evanescent waves are well-known in acoustics and optics and have recently received much attention due to their extraordinary properties such as their transverse spin and spin-momentum locking. We show that EGWs possess similarly remarkable properties, carrying transverse spin angular momenta and driving freely falling test masses along in elliptical trajectories. Hence, test masses on a plane transverse to the direction of propagation exhibit correlated vector and scalar-like deformation---correlations which can be used to distinguish it from modified gravity. We demonstrate that EGWs are present and dominant in the vicinity of sub-wavelength sources such as orbiting binaries.
description: 13 pages, movie link https://youtu.be/DB7mHGqsrLk
Cantorian Fractal Spacetime and Quantum-like Chaos in Neural Networks of the Human Brain
Creators: name: Selvam, A. M.
Publisher: name: arXiv
Year: 1998
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: The neural networks of the human brain act as very efficient parallel processing computers co-ordinating memory related responses to a multitude of input signals from sensory organs. Information storage, update and appropriate retrieval are controlled at the molecular level by the neuronal cytoskeleton which serves as the internal communication network within neurons. Information flow in the highly ordered parallel networks of the filamentous protein polymers which make up the cytoskeleton may be compared to atmospheric flows which exhibit long-range spatiotemporal correlations, i.e. long-term memory. Such long-range spatiotemporal correlations are ubiquitous to real world dynamical systems and is recently identified as signature of self-organized criticality or chaos. The signatures of self-organized criticality i.e. long-range temporal correlations have recently been identified in the electrical activity of the brain. A recently developed non-deterministic cell dynamical system model for atmospheric flows predicts the observed long-range spatiotemporal correlations as intrinsic to quantum-like mechanics governing flow dynamics. The model visualises large scale circulations to form as the result of spatial integration of enclosed small scale perturbations with intrinsic two-way ordered energy flow between the scales. Such a concept maybe applied for the collection and integration of a multitude of signals at the cytoskeletal level and manifested in activation of neurons in the macroscale. The cytoskeleton networks inside neurons may be the elementary units of a unified dynamic memory circulation network with intrinsic global response to local stimuli.
description: 16 Pages. Submitted for consideration of publication in "Chaos, Solitons and Fractals"(1998)
The Effect of Father Involvement on Child Sexual Decision Making
Creators: Haldane, Eva Cherie
Publisher: name: Columbia University
Year: 2018
Subjects: Social service
Social capital (Sociology)
Teenagers--Sexual behavior
Father and child
Education--Parent participation

description: Using the National Longitudinal Study of Adolescent Health (Add Health), this dissertation explores whether fathers talking to their children about dating affects the odds of their children having unprotected sex when they are emerging adults. Logistic regressions were used to analyze the relationship between one measure of father engagement, talking to the child about dating, and sexual risk taking, operationalized as having unprotected sex.  Utilizing social capital theory and Lamb, Pleck, Charnov and Levine’s (1985, 1987) conceptualization of fatherhood, this paper explored the possibility that father involvement could either increase or decrease child’s sexual risk.  Results from the first model indicate that talking to the father about dating increases the odds of children having unprotected sex.  The results also showed that feeling close to the father was not a moderator.  The second model investigated if there is a difference in the effect of father involvement by gender.  Talking to the father about dating increased the odds of nonresident daughters and resident sons having unprotected sex.  Feeling close to the father was not a moderator.  The third model explored if there was a difference in the effects of father involvement by race and did find a difference.  White resident children had increased odds of having unprotected sex if they talked to their fathers about dating.  Feeling close to the father was not a moderator in this chapter.  These results challenge the prominent narrative in the literature that father involvement is an unmitigated good influence in the child’s life; instead, these results show that for some children father involvement can create more harm than good.  It is important to note that most fathers did not talk to their children about dating and that the specific content and tone of the conversations these fathers had with their children is unknown.  There is space in the literature to explore how specific messages fathers give their children influence their sexual risk decisions in the future.  There is also space for the creation of feminist focused fatherhood programs to help fathers talk to their children about dating and sex in a way that reduces child risk taking when they are older.
The Gowdy T3 Cosmologies revisited
Creators: name: Hern, S. D.
name: Stewart, J. M.
Publisher: name: arXiv
Year: 1997
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We have examined, repeated and extended earlier numerical calculations of Berger and Moncrief for the evolution of unpolarized Gowdy T3 cosmological models. Our results are consistent with theirs and we support their claim that the models exhibit AVTD behaviour, even though spatial derivatives cannot be neglected. The behaviour of the curvature invariants and the formation of structure through evolution both backwards and forwards in time is discussed.
description: 11 pages, LaTeX, 6 figures, results and conclusions revised and (considerably) expanded
D2.2 User and Stakeholder Requirements
Creators: name: Peter Fröhlich
Publisher: name: Zenodo
Year: 2021

description: Deliverable 2.2 presents a systematic analysis of user and stakeholder requirements for comprehensive automated ground goods transportation system (AGTS) technology, which is developed within the project AWARD. The goal of this project is to pave the way for the roll-out of driverless transportation, whatever the weather conditions are. It will deploy safe and efficient connected and automated heavy-duty vehicles in real-life logistics operations. The results delivered by this report comprise an acceptance and expectations analysis and an aggregated list of 26 user and stakeholder requirements, covering aspects like vehicle fleet operation, reliability, job and workforce, conditions, business modelling, as well as ethical aspects.
Experimental demonstration of switching entangled photons based on the Rydberg blockade effect
Creators: name: Yu, Yi-Chen
name: Dong, Ming-Xin
name: Ye, Ying-Hao
name: Guo, Guang-Can
name: Ding, Dong-Sheng
name: Shi, Bao-Sen
Publisher: name: arXiv
Year: 2019
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The long-range interaction between Rydberg-excited atoms endows a medium with large optical nonlinearity. Here, we demonstrate an optical switch to operate on a single photon from an entangled photon pair under a Rydberg electromagnetically induced transparency configuration. With the presence of the Rydberg blockade effect, we switch on a gate field to make the atomic medium nontransparent thereby absorbing the single photon emitted from another atomic ensemble via the spontaneous four-wave mixing process. In contrast to the case without a gate field, more than 50% of the photons sent to the switch are blocked, and finally achieve an effective single-photon switch. There are on average 1-2 gate photons per effective blockade sphere in one gate pulse. This switching effect on a single entangled photon depends on the principal quantum number and the photon number of the gate field. Our experimental progress is significant in the quantum information process especially in controlling the interaction between Rydberg atoms and entangled photon pairs.
description: 9 pages, 8 figures
Modified perturbation theory approach for tt-bar production and decay
Creators: name: Nekrasov, M. L.
Publisher: name: arXiv
Year: 2002
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The modified perturbation theory (MPT), based on direct expansion of probabilities instead of amplitudes, allows one to avoid divergences in the phase-space integrals resulting from production and decay of unstable particles. In the present paper the range of applicability of MPT is determined numerically in the case of the process $e^+e^- \to (γ,Z) \to t\bar t \to W^{+}b:W^{-}\bar b$. It is shown that with the complete expansion in powers of the coupling constant (without Dyson resummation) MPT operates best at the energies located near the maximum of the cross-section and slightly above the maximum. In this region the MPT expansion within the next-to-leading order considerably exceeds in accuracy well-known DPA approach.
description: LaTeX, 11 pages, 3 eps figures
On the Sperner property for the absolute order on complex reflection groups
Creators: name: Gaetz, Christian
name: Gao, Yibo
Publisher: name: arXiv
Year: 2019
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics

description: Two partial orders on a reflection group, the codimension order and the prefix order, are together called the absolute order when they agree. We show that in this case the absolute order on a complex reflection group has the strong Sperner property, except possibly for the Coxeter group of type $D_n$, for which this property is conjectural. The Sperner property had previously been established for the noncrossing partition lattice $NC_W$, a certain maximal interval in the absolute order, but not for the entire poset, except in the case of the symmetric group. We also show that neither the codimension order nor the prefix order has the Sperner property for general complex reflection groups.
description: 12 pages, comments welcome; v2: minor edits and journal reference
Anthriscus sylvestris (L.) Hoffm.
Creators: name: Zhou, Ya-Dong
name: Mwachala, Geoffrey
name: Hu, Guang-Wan
name: Wang, Qing-Feng
Publisher: name: Zenodo
Year: 2022
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Magnoliopsida
Apiales
Apiaceae
Anthriscus
Anthriscus sylvestris

description: Anthriscus sylvestris (L.) Hoffm.  —
Habit: Herb.
Habitat: LMWF, LMDF, BZ, UMF, HZ; 1 700–4 000 m. Distribution: I.
 Voucher: Near Meru Bandas, Alt. 2 994 m, 21 Jul. 2014, SAJIT 001947 (HIB).
References: Fries & Fries (1927a), Townsend (1989), Bussmann (1993, 1994, 2006), Bussmann & Beck (1995a, 1998, 1999), Agnew (2013).
description: Published as part of Zhou, Ya-Dong, Mwachala, Geoffrey, Hu, Guang-Wan & Wang, Qing-Feng, 2022, Annotated checklist of the vascular plants of Mount Kenya, East Africa, pp. 1-108 in Phytotaxa 546 (1) on page 99, DOI: 10.11646/phytotaxa.546.1.1, http://zenodo.org/record/6550464
Allantus obesus Mocsary 1880
Creators: name: Taeger, Andreas
Publisher: name: Zenodo
Year: 2013
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Tenthredinidae
Allantus
Allantus obesus

description: Allantus obesus Mocsáry, 1880
A senior objective synonym of Tenthredo (Cephaledo) neobesa Zombori, 1980.
TYPES. Allantus obesus Mocsáry, 1880: 271. Syntype (s) Ƥ, “In Alto-Balkan Bulgariae”. Primary homonym of Allantus obesus Norton, 1860 [= Eriocampa juglandis (Fitch, 1857)]. Lectotype Ƥ, hereby designated (Fig. 30). Type locality: “Balkan” [= Bulgaria: Stara planina].
= Tenthredo neobesa Zombori, 1980: 184. Replacement name for Allantus obesus Mocsáry, 1880.
DISCUSSION. Zombori (1977) and Taeger (1985) wrongly considered the only syntype specimen in the HNHM to be the holotype. Mocsáry (1880) did not state the number of the specimens in his description; thus, this specimen is considered to be a syntype. This specimen is hereby designated as lectotype (Fig. 30). Based on Mocsáry’s original description, Blank & Taeger (1998) discussed the confusion surrounding T. pseudorossii Taeger, 1985, T. neobesa and T. jelochovcevi. Tenthredo obesa sensu Zombori, 1977 and Tenthredo neobesa sensu Taeger, 1985 represent Tenthredo jelochovcevi Vassilev, 1971. The proposed synonymy of T. pseudorossii is hereby confirmed.
description: Published as part of Taeger, Andreas, 2013, The type specimens of Tenthredo Linnaeus, 1758 (Hymenoptera: Tenthredinidae) deposited in the Hungarian Natural History Museum, pp. 201-244 in Zootaxa 3626 (2) on page 223, DOI: 10.11646/zootaxa.3626.2.1, http://zenodo.org/record/248049
Entropy functionals and thermodynamics of relativistic geometric flows, stationary quasi-periodic Ricci solitons, and gravity
Creators: name: Bubuianu, Iuliana
name: Vacaru, Sergiu I.
name: Veliev, Elşen Veli
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 investigate gravity models emerging from nonholonomic (subjected to non-integrable constraints) Ricci flows. Considering generalizations of G. Perelman's entropy functionals, relativistic geometric flow equations, nonholonomic Ricci soliton, and equivalent (modified) Einstein equations are derived. There are studied nonholonomic configurations that allow explicit modeling of entropic scenarios for gravity and dark matter (in the E. Verlinde approach and/or other variants). It is shown that using the anholonomic frame deformation method, the systems of nonlinear partial differential equations for geometric flow evolution of nonlinear stationary gravitations systems can be decoupled and integrated in general forms. In this and a series of partner works, we elaborate on stationary models of emergent gravity with quasi-periodic gravitational, matter fields and dark energy/matter structure. Such configurations cannot be described thermodynamically using the concept of Bekenstein-Hawking entropy if area-entropy, holographic or duality relations are not involved. Nevertheless, generalizing G. Perelman statistic thermodynamic approach to models of relativistic Ricci flows and nonholonomic solitons, we can compute respective thermodynamic variables for all types of gravitational and matter field configurations and their geometric evolution. Nonholonomic deformations of the F- and W-entropy considered and relativistic thermodynamic models are studied in more general cases when physically important solutions with quasi-periodic and pattern forming structure are found in modified gravity theories (MGT) and general relativity (GR).
description: latex2e 11pt, 23 pages, v5 accepted to Annals Phys. NY, substantially modified following requests of editor and referee
The Effect of Maternal Depression on Birth Outcome and Child Obesity Risk: A Proposal to the National Institute of Health
Creators: Kumar, Sonal
Publisher: name: Columbia University
Year: 2011
Subjects: subject: Psychology
subject: FOS: Psychology

description: There is a large body of research on the cognitive, emotional, and
behavioral outcomes of children of depressed mothers. However, little research has been done on whether maternal perinatal depression
affects child obesity. Thus, the proposed study will be critically relevant to the
current public health epidemic of obesity. The objective of the proposed study will
be to examine the correlation between maternal depression and child obesity risk.
Centella asiatica (L.) Urb.
Creators: name: Zhou, Ya-Dong
name: Mwachala, Geoffrey
name: Hu, Guang-Wan
name: Wang, Qing-Feng
Publisher: name: Zenodo
Year: 2022
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Magnoliopsida
Apiales
Apiaceae
Centella
Centella asiatica

description: Centella asiatica (L.) Urb.  —
Habit: Herb.
Habitat: LMWF, LMDF; up to 3 900 m. Distribution: I.
 Voucher: Naro Moru Track, Alt. 2 546 m, 23 Jul. 2014, SAJIT 002049 (HIB).
References: Fries & Fries (1927a), Bussmann (1993), Bussmann & Beck (1995a), Agnew (2013).
description: Published as part of Zhou, Ya-Dong, Mwachala, Geoffrey, Hu, Guang-Wan & Wang, Qing-Feng, 2022, Annotated checklist of the vascular plants of Mount Kenya, East Africa, pp. 1-108 in Phytotaxa 546 (1) on page 99, DOI: 10.11646/phytotaxa.546.1.1, http://zenodo.org/record/6550464
Cosmic-ray propagation around the Sun: investigating the influence of the solar magnetic field on the cosmic-ray Sun shadow
Creators: name: Tjus, Julia Becker
name: Desiati, Paolo
name: Döpper, Niklas
name: Fichtner, Horst
name: Kleimann, Jens
name: Kroll, Mike
name: Tenholt, Frederik
Publisher: name: arXiv
Year: 2019
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The cosmic-ray Sun shadow, which is caused by high-energy charged cosmic rays being blocked and deflected by the Sun and its magnetic field, has been observed by various experiments, such as Argo-YBJ, HAWC, Tibet, and IceCube. Most notably, the shadow's size and depth was recently shown to correlate with the 11-year solar cycle. The interpretation of such measurements, which help to bridge the gap between solar physics and high-energy particle astrophysics, requires a solid theoretical understanding of cosmic-ray propagation in the coronal magnetic field. It is the aim of this paper to establish theoretical predictions for the cosmic-ray Sun shadow in order to identify observables that can be used to study this link in more detail. To determine the cosmic-ray Sun shadow, we numerically compute trajectories of charged cosmic rays in the energy range of 5-316 TeV for five different mass numbers. We present and analyze the resulting shadow images for protons and iron, as well as for typically measured cosmic-ray compositions. We confirm the observationally established correlation between the magnitude of the shadowing effect and both the mean sunspot number and the polarity of the magnetic field during the solar cycle. We also show that during low solar activity, the Sun's shadow behaves similarly to that of a dipole, for which we find a non-monotonous dependence on energy. In particular, the shadow can become significantly more pronounced than the geometrical disk expected for a totally unmagnetized Sun. For times of high solar activity, we instead predict the shadow to depend monotonously on energy, and to be generally weaker than the geometrical shadow for all tested energies. These effects should become visible in energy-resolved measurements of the Sun shadow, and may in the future become an independent measure for the level of disorder in the solar magnetic field.
description: 18 pages, 88 figures
The Effect of Instructional Embodiment Designs on Chinese Language Learning: The Use of Embodied Animation for Beginning Learners of Chinese Characters
Creators: Lu, Ming-Tsan Pierre
Publisher: name: Columbia University
Year: 2011
Subjects: Educational psychology
Cognitive psychology

description: The focus of this study was an investigation of the effects of embodied animation on the retention outcomes of Chinese character learning (CCL) for beginning learners of Chinese as a Foreign Language (CFL). Chinese characters have three main features: semantic meaning, pronunciation, and written form.  Chinese characters are different from English words in that they are non-alphabetic orthographies.  Though popular, they are deemed very hard to learn.  However, Chinese character processing is found to be neurologically related to human body movements, or at least the imagination of them.  Literature also indicated the importance of embodied cognition, imagination, and technology use in human language memory and learning.  The design of embodied animation for a computer-based CCL program is developed which consists of three types of characters. The study used Between-Subject Post-test Only Control Group experimental design with sixty-nine adults.  The study compared five learning conditions: embodied animation learning (EAL), human-image animation learning (HAL), object-image animation learning, no-animation etymology learning, and traditional learning (serving as a control group).  Participants in the EAL group perceived the character etymological animation, and then a video clip depicting the moving actions of human body movements and/or gestures which show the semantic meaning and the written form of the character. The study found that the EAL group outperformed the other learning groups with medium to large effects.  Specifically, after one week of learning, the EAL group outperformed the other groups in terms of learners' free recall of Chinese characters, in characters' meaning-form mappings, and in characters' form-meaning and-sound mappings.  Furthermore, the EAL group performed better than the other groups in the retention of all three types of characters (i.e., pictograph, indicative, and ideograph).  Therefore, findings revealed the positive effects of embodied animation on CCL.  In addition, the HAL group showed promising retention rate by constantly performing the second best in all tasks.  The study also revealed that pictographs and indicatives were better learned than ideographs across groups.  Drawing from the study, the use of embodied animation in a computer-based program is suggested to be effective on character learning for beginning learners of CFL.
Feminine identity and functional benefits are key factors in women’s decision making about upper limb prostheses: a case series
Creators: name: Resnik, Linda
name: Klinger, Shana
name: Anisha Gill
name: Biester, Sarah Ekerholm
Publisher: name: Taylor & Francis
Year: 2019
Subjects: subject: Medicine
subject: Biotechnology
subject: Sociology
subject: FOS: Sociology
subject: Cancer
subject: Science Policy
subject: 110309 Infectious Diseases
subject: FOS: Health sciences

description: Purpose: Although the DEKA Arm promises new abilities, it is unclear if women with upper limb amputation are willing to avail themselves of this new technology. The study purpose was to understand key factors and tradeoffs that shape women’s attitudes towards the DEKA Arm. Methods: This case series includes three women with transradial amputation. Structured surveys and semi-guided interviews were administered after completion of in-laboratory training and a home trial of the DEKA Arm. A constant comparative method with a grounded theory approach was used to generate a model describing women’s decision-making related to the DEKA Arm. Quantitative data on prosthetic satisfaction was used to triangulate findings. Results: Factors that enhanced desirability of the DEKA Arm were improved functionality, increased abilities and the availability of someone to service the prosthesis. Factors that detracted from desirability of the device were its appearance, conspicuousness, lifestyle incompatibility, weight, need for service and difficulty of use. Each woman weighted these factors within the larger context of the capabilities of and satisfaction with her personal prostheses, her self-concept and lifestyle needs. Situational demands, particularly the desire to appear feminine and professional or need to perform certain activities, also altered the valuation of these priorities. Conclusion: Findings strongly suggest that advanced upper limb prosthetic technologies, like the DEKA Arm, will be better accepted by women if appropriately gendered in appearance and designed with women’s priorities in mind.Implications for RehabilitationWomen should be able to derive the functional benefits of advances in upper limb technology without needing to compromise their feminine identity and lifestyle preferences.Advanced upper limb prosthetic technologies will be better accepted by women if they are appropriately gendered. Women should be able to derive the functional benefits of advances in upper limb technology without needing to compromise their feminine identity and lifestyle preferences. Advanced upper limb prosthetic technologies will be better accepted by women if they are appropriately gendered.
A Numerical Quantum and Classical Adversary
Creators: name: Mullan, Michael
Publisher: name: The University of British Columbia
Year: 2016

description: The Quantum Adversary Method has proven to be a successful technique for deriving lower bounds on a wide variety of problems. However, it assumes perfect quantum computation, which in most modern devices, is unrealistic. Here, we develop a generalization of this technique without this assumption, which can be applied to arbitrary small problems automatically. To do this, we start by reformulating the objective value of the semidefinite program of the spectral adversary method. By relating the final measurement stage of a quantum computation to remote state preparation, we prove that the optimal value of the new objective corresponds to the probability that the quantum computer will output the correct value after a specified number of queries. Once in this framework, the addition of decoherence is natural. In particular, the optimum probability of success can be determined for any probability of phase error. In the limit of complete phase decoherence, we recover the optimal p! robability of success for a classical computation. Our semidefinite programming formulation is suitably general, and so has application outside that of algorithms. In particular, we apply it to the optimization of quantum clocks.
Spectral properties of non-hydrogenic atoms in weak external fields
Creators: name: Jonckheere, T.
name: Gremaud, B.
name: Delande, D.
Publisher: name: arXiv
Year: 1998
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: We study how the ionic core in a non-hydrogenic atom modifies the dynamics of a Rydberg electron in the presence of a weak static external field. We show that such a system is neither regular nor chaotic: its energy levels display unusual statistical properties, intermediate between the standard Poisson and Random Matrix ones. The ionic core acts as a scatterer whose size is comparable to the de Broglie wavelength of the electron, inducing specific quantum effects.
description: 5 pages, 4 figures. To appear in Physical Review Letter