cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
A case study of teachers' perceptions in a culture of change
Creators: name: Percy, John
Publisher: name: Australian Catholic University
Year: 1997

description: The purpose of this research is to examine the effects of ongoing educational change that has occurred at a particular school. It attempts to identify the thoughts of teachers as they work within this culture of change and link them to the literature on what change looks like from the position of teaching. Unless the experience of teaching is considered from the perspective of teachers, educational change could become professional rhetoric. The research seeks to understand why some educational changes are perceived by teachers as being more effective than others in improving the teaching – learning interface at a particular secondary college. It explores why the staff have been influenced or not by the ongoing educational change over the past five years. In designing research to respond to teacher’s perceptions, an interpretive paradigm using ethnographic and case study principles was used. The following research questions emerged to focus the research: 1. What influences have produced a change in the way teachers do things at the teaching – learning interface? 2. What factors made the changes difficult or easy to implement? 3. What contributed to or detracted from the personal motivation and energy of teachers to participate in the change process? 4. How have teachers been able to manage the time available for change? 5. What are some of the ways teachers have changed their thinking and doing with regards to teaching and learning? 6. What is the nature of relationships that have influenced the teacher to change? The study concluded that the successful implementation of continual renewal of what we do in the classroom comes from within the community and from the individual and not by the hierarchical passing down of rules and regulations. Moreover it is concluded that, for successful educational change, the staff and college need a clearly articulated and agreed focus and vision for what they are doing.
Characterizing M-estimators
Creators: name: Dimitriadis, Timo
name: Fissler, Tobias
name: Ziegel, Johanna
Publisher: name: arXiv
Year: 2022
Subjects: subject: Statistics Theory (math.ST)
subject: Econometrics (econ.EM)
subject: FOS: Mathematics
subject: FOS: Economics and business

description: We characterize the full classes of M-estimators for semiparametric models of general functionals by formally connecting the theory of consistent loss functions from forecast evaluation with the theory of M-estimation. This novel characterization result opens up the possibility for theoretical research on efficient and equivariant M-estimation and, more generally, it allows to leverage existing results on loss functions known from the literature of forecast evaluation in estimation theory.
description: arXiv admin note: substantial text overlap with arXiv:2010.14146
Solving the Cold-Start Problem in Recommender Systems with Social Tags
Creators: name: Zhang, Zi-Ke
name: Liu, Chuang
name: Zhang, Yi-Cheng
name: Zhou, Tao
Publisher: name: arXiv
Year: 2010
Subjects: subject: Information Retrieval (cs.IR)
subject: Physics and Society (physics.soc-ph)
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences

description: In this paper, based on the user-tag-object tripartite graphs, we propose a recommendation algorithm, which considers social tags as an important role for information retrieval. Besides its low cost of computational time, the experiment results of two real-world data sets, \emph{Del.icio.us} and \emph{MovieLens}, show it can enhance the algorithmic accuracy and diversity. Especially, it can obtain more personalized recommendation results when users have diverse topics of tags. In addition, the numerical results on the dependence of algorithmic accuracy indicates that the proposed algorithm is particularly effective for small degree objects, which reminds us of the well-known \emph{cold-start} problem in recommender systems. Further empirical study shows that the proposed algorithm can significantly solve this problem in social tagging systems with heterogeneous object degree distributions.
Additional file 5: of Transcriptome analysis reveals the mechanism by which spraying diethyl aminoethyl hexanoate after anthesis regulates wheat grain filling
Creators: name: Wen, Daxing
name: Li, Yan
name: He, Lifeng
name: Zhang, Chunqing
Publisher: name: figshare
Year: 2019
Subjects: subject: Microbiology
subject: FOS: Biological sciences
subject: Cell Biology
subject: Genetics
subject: Molecular Biology
subject: Evolutionary Biology
subject: Environmental Sciences not elsewhere classified
subject: Chemical Sciences not elsewhere classified
subject: Biological Sciences not elsewhere classified
subject: Information Systems not elsewhere classified
subject: Developmental Biology
subject: Marine Biology
subject: Infectious Diseases
subject: FOS: Health sciences
subject: Plant Biology
subject: Computational Biology

description: Table S2 List of selected genes for KEGG pathways in L6vsL0. (DOCX 14 kb)
Analysis and Optimisation of Network Parameters in Deep Learning Based Neural Networks
Creators: name: Sinha, Toshi
Publisher: name: Central Queensland University
Year: 2018
Subjects: Deep learning
Convolutional neural networks
Optimization
Particle swarm optimization
Image classification
Parameter selection

description: Deep learning neural networks, or, more precisely, Convolutional Neural Networks (CNNs), have demonstrated great potential in terms of their treatment of complex image classification problems over the past few years. CNNs have a large number of parameters and the system accuracy depends directly on the selection of these parameters. Despite CNNs’ recent successes, the diverse numbers of parameters and the impact and values of those parameters in deep learning are still unknown. Due to the unknown impacts and values of these deep learning parameters, many trial-and-error or ad hoc methods are used to configure deep learning systems, which increase training time, reduce performance and result in lower classification accuracies, especially when applied to complex real-world applications. In practice, optimal parameter selection remains the biggest obstacle when designing a real-world application using CNNs. This research has investigated the impact of deep learning parameters on classification accuracy and their applicability in real-world applications, such as scene parsing. In particular, this research has focused on the impact of changing the input window size, the filter size, the number of layers and the number of filters. A methodology based on repeated measures and an evolutionary algorithm to obtain the optimal values for the network parameters has been developed; additionally, a large number of experiments using the developed methodology and benchmark datasets were conducted. Finally, a comparative analysis of the results was presented and discussed.The original contributions of this thesis are Grid and Particle Swarm Optimisation (PSO) based methods for optimising and determining the impact of network parameters in deep learning-based real-world applications. The experimental analysis has shown that the PSObased method has achieved 81.47% and 88.3% accuracies for CIFAR-10 and RSVD datasets respectively, which are better than the accuracies obtained using grid based parameter optimisation and other existing approaches.
title: The development and characterization of bile acid-derived agonists of FXR towards NASH treatment
Creators: name: Kydd-Sinclair, Dannielle
Publisher: name: University of Reading
Year: 2025

description: Over the last few decades, bile acids (BAs) have emerged as important hormone-like signalling molecules. Bile acids have been shown to exert their effects through the binding and activation of the Farnesoid X Receptor (FXR), which regulates various pleiotropic target genes underlying bile acid homeostasis, inflammation and lipid, glucose and cholesterol metabolism. FXR plays a pivotal role in the aetiology of various liver pathologies and metabolic syndromes and, as such, is an attractive therapeutic target. Use of the semi-synthetic BA analogue drug, obeticholic acid (OCA), has been impeded due to its activation of other BA receptors, and due to the promiscuity of systemic FXR activation, which leads to unfavourable and counterintuitive effects. Work described here exploited structural data about the ligand binding domain (LBD) of FXR to design novel, BA-derived agonists. Computational molecular docking approaches were used to determine the putative binding mechanisms of novel compounds, and with supplementary biological activity data, it was postulated that lead candidates implement a unique binding mode. Efforts were devoted to obtaining a 3D structure of the LBD in complex with lead novel compounds and associated cofactors in an effort to validate ligand binding interactions, and to gain further insight into how ligand-mediated structural conformations determine functional activation of FXR. Two lead novel compounds were confirmed as bona fide agonists of FXR, with improved potency compared to OCA, and these were able to recruit coactivators essential for transcriptional activity. Furthermore, these novel agonists were shown to regulate the expression of genes targeted by FXR, both in vitro and in vivo. Taken collectively, the results presented herein suggested that one of the lead compounds may achieve some FXR-target selectivity by its ability to induce conformations of FXR that preferentially recruit specific coactivators. Despite their common BA scaffold, the two lead compounds displayed differential regulation of target genes in vivo compared to OCA and, importantly, this work supports scope for these compounds to be further developed as pharmacological agents for certain diseases.
title: English to Malay and back again: an analysis of lecturers' code switching in English classrooms
Creators: name: Majid, Sheikha
Publisher: name: University of Reading
Year: 2022

description: Bilingual speakers often engage in code mixing, that is the use of lexical items and grammatical features from two languages in one sentence (Muysken, 2000, p. 1). Malaysia is no stranger to the phenomenon of code switching1 as it is a multilingual country. The study offers a new perspective on code switching focusing on Muysken’s (2015) code mixing typology and filled an important gap in our knowledge about code switching in education settings, as this study is the first to apply this typology to classroom settings in Malaysia. The second focus of this study was the functions of code mixing used by the participants. The functions identified were based on available works of literature, however, there are two new functions identified in the current study namely the ‘technical vocabulary’ function and the ‘verbal cue’ function. The third aim of this study was to investigate the lecturers’ perceptions regarding the use of code switching. This is a mixed methods study and the data was obtained from the recordings of two English lecturers, Azma and Ali, in Malaysia who were observed for seven weeks. The classroom recordings were transcribed and the types of code mixing were calculated using the Computerized Language Analysis (CLAN) programme (MacWhinney, 2000). The functions of code mixing were analysed and calculated using Microsoft Excel. The interview recordings were transcribed and analysed by thematic analysis using NVivo. The overall results for the types of code mixing showed that the most frequent type of code mixing was insertion (32.9%) followed with congruent lexicalization (30.7%), alternation (24.8%) and back-flagging (11.6%). The results of Azma’s and Ali’s data revealed nine and eight functions of code mixing respectively. ‘Explanation and clarifying subject matter’ was the most prevalent function of code mixing with 58.5% (Azma) and 39.9% (Ali) and 1Code switching is used as a generic term for the usage of two languages interchangeably. ‘imperative function’, the least function applied with 0.5% (Azma) and 0.3% (Ali). The interviews provided insight on the lecturers’ awareness on the functions of code mixing in which their statements did not reflect their practice in the classroom. The interviews also revealed that Azma had mixed feelings on the use of code switching while Ali fully supported the use of code switching in the classroom.
The collaborative role of parental participation in school policy development: A case study
Creators: name: Creevey, Mark
Publisher: name: Australian Catholic University
Year: 1994

description: This case study is centred on the examination of the role of parental involvement in school policy development. It documents the collaborative process of school policy development in the field of Computer and Technology Education. Examination of the process of school policy formation was undertaken in a qualitative manner, by the recording of a journal, interviews with committee members, and comparative questionnaires conducted with staff and parents eliciting attitudinal data with a view to refining this process for subsequent school policy development opportunities. The following research questions were generated on an apriori basis. - Do parents wish to be involved in the collaborative development of school policy design and in what capacity? - What are the factors and conditions that need to be present to promote parental involvement? - What are the barriers and obstacles that impede the involvement of parents in policy development? - What are the benefits to the school community of parental involvement in school policy making? Whilst the particular task of this study was to develop a school Computer and Technology policy the process undertaken by staff, parents and administration personnel was within the scope and design of an action research project. This project commenced with the formation of a committee comprised of staff, parent and administration representatives. The committee developed a.strategy that was collaborative in nature within the relationships of the working party, yet consultative with the wider respective communities namely the school parent body and the teaching staff. The findings of the case study revealed that parents generally sought to be involved in school policy development particularly in the non-academic domain. The factors that promoted this parental involvement in policy development were the existence of a conducive atmosphere, role of the Principal, open channels of communication, a consultative process, the existence of a suitable incentive for parents, and external factors such as government and /or systemic policies. There were some identified barriers to this collaborative policy formation. These included available parental time, parental feelings of inadequacy, expressions of apathy, the use of technical language or jargon by teachers, and the presence of some negative parental energies that hindered the process. Finally the case study identified the benefits of the collaborative involvement of parents in school policy development as the establishment of a constructive partnership between parents and teachers, comprehensive policy development, and the increased level of ownership and commitment exhibited by staff and parents.
What Tobacco Farming Means to Local Economies
Creators: name: Gale, Fred
name: Gale, Fred
Publisher: name: Unknown
Year: 1994
Subjects: subject: Community/Rural/Urban Development
subject: Crop Production/Industries
subject: Labor and Human Capital
subject: Tobacco industry
subject: economic impacts
subject: input-output models
subject: regional economies

description: Consumers spent over $45 billion on tobacco products in 1991, generating income and employment in wholesale and retail trade, manufacturing, sales, distribution, storage, and tobacco farming. Tobacco farms are a small part of the tobacco industry, with the domestic farm value of tobacco accounting for about 3 cents per dollar spent on tobacco products in the United States. Tobacco farms play a modest role in most local economies. The estimated impact of tobacco production in 1990 ranged from 0.5 to 15 percent of personal income and from 0.5 to 10.9 percent of employment in tobacco-growing areas.
A Multimodal Transformer: Fusing Clinical Notes with Structured EHR Data for Interpretable In-Hospital Mortality Prediction
Creators: name: Lyu, Weimin
name: Dong, Xinyu
name: Wong, Rachel
name: Zheng, Songzhu
name: Abell-Hart, Kayley
name: Wang, Fusheng
name: Chen, Chao
Publisher: name: arXiv
Year: 2022
Subjects: subject: Computation and Language (cs.CL)
subject: FOS: Computer and information sciences

description: Deep-learning-based clinical decision support using structured electronic health records (EHR) has been an active research area for predicting risks of mortality and diseases. Meanwhile, large amounts of narrative clinical notes provide complementary information, but are often not integrated into predictive models. In this paper, we provide a novel multimodal transformer to fuse clinical notes and structured EHR data for better prediction of in-hospital mortality. To improve interpretability, we propose an integrated gradients (IG) method to select important words in clinical notes and discover the critical structured EHR features with Shapley values. These important words and clinical features are visualized to assist with interpretation of the prediction outcomes. We also investigate the significance of domain adaptive pretraining and task adaptive fine-tuning on the Clinical BERT, which is used to learn the representations of clinical notes. Experiments demonstrated that our model outperforms other methods (AUCPR: 0.538, AUCROC: 0.877, F1:0.490).
description: AMIA Annual Symposium Proceedings 2022
title: Ð¢ÑÑÐ±Ð¾Ð²Ð°Ð»ÑÐ½ÑÐ¹ Ð°Ð²Ð¸Ð°ÑÐ¸Ð¾Ð½Ð½ÑÐ¹ Ð´Ð²Ð¸Ð³Ð°ÑÐµÐ»Ñ Ð¼Ð¾ÑÐ½Ð¾ÑÑÑÑ 1,3 ÐÐÑ
title: Ð²ÑÐ¿ÑÑÐºÐ½Ð°Ñ ÐºÐ²Ð°Ð»Ð¸ÑÐ¸ÐºÐ°ÑÐ¸Ð¾Ð½Ð½Ð°Ñ ÑÐ°Ð±Ð¾ÑÐ° Ð±Ð°ÐºÐ°Ð»Ð°Ð²ÑÐ°
titleType: Subtitle
title: Turbo-shaft aircraft installation 1,3 MW
Creators: name: ÐÐ¸ÐºÐ¼ÑÐ»Ð¸Ð½, ÐÐ½Ð´ÑÐµÐ¹
Publisher: name: Ð¡Ð°Ð½ÐºÑ-ÐÐµÑÐµÑÐ±ÑÑÐ³ÑÐºÐ¸Ð¹ Ð¿Ð¾Ð»Ð¸ÑÐµÑÐ½Ð¸ÑÐµÑÐºÐ¸Ð¹ ÑÐ½Ð¸Ð²ÐµÑÑÐ¸ÑÐµÑ ÐÐµÑÑÐ° ÐÐµÐ»Ð¸ÐºÐ¾Ð³Ð¾
Year: 2022
Subjects: ÑÑÑÐ±Ð¾Ð²Ð°Ð»ÑÐ½ÑÐ¹ Ð°Ð²Ð¸Ð°ÑÐ¸Ð¾Ð½Ð½ÑÐ¹ Ð´Ð²Ð¸Ð³Ð°ÑÐµÐ»Ñ
ÐºÐ¾Ð¼Ð¿ÑÐµÑÑÐ¾Ñ
ÑÑÑÐ±Ð¸Ð½Ð°
Ð»Ð¾Ð¿Ð°ÑÐºÐ°
Ð´Ð¸ÑÐº
ÑÐ¾ÑÐ¾Ñ
turbo-shaft aircraft engine
compressor
turbine
disÑ
rotor

description: Ð¢ÐµÐ¼Ð° Ð²ÑÐ¿ÑÑÐºÐ½Ð¾Ð¹ ÐºÐ²Ð°Ð»Ð¸ÑÐ¸ÐºÐ°ÑÐ¸Ð¾Ð½Ð½Ð¾Ð¹ ÑÐ°Ð±Ð¾ÑÑ: Â«Ð¢ÑÑÐ±Ð¾Ð²Ð°Ð»ÑÐ½ÑÐ¹ Ð°Ð²Ð¸Ð°ÑÐ¸Ð¾Ð½Ð½ÑÐ¹ Ð´Ð²Ð¸Ð³Ð°ÑÐµÐ»Ñ Ð¼Ð¾ÑÐ½Ð¾ÑÑÑÑ 1,3 ÐÐÑÂ».Ð Ð´Ð°Ð½Ð½Ð¾Ð¹ ÑÐ°Ð±Ð¾ÑÐµ Ð¿ÑÐ¾Ð¸Ð·Ð²ÐµÐ´ÐµÐ½ ÑÐ°ÑÑÐµÑ ÑÑÑÐ±Ð¾Ð²Ð°Ð»ÑÐ½Ð¾Ð³Ð¾ Ð°Ð²Ð¸Ð°ÑÐ¸Ð¾Ð½Ð½Ð¾Ð³Ð¾ Ð´Ð²Ð¸Ð³Ð°ÑÐµÐ»Ñ Ð¼Ð¾ÑÐ½Ð¾ÑÑÑÑ 1,3 ÐÐÑ Ð¿Ð¾ Ð¿ÑÐ¾ÑÐ¾ÑÐ¸Ð¿Ñ ÐÐ-2500.Ð ÑÐ°Ð±Ð¾ÑÐµ Ð²ÑÐ¿Ð¾Ð»Ð½ÐµÐ½ ÑÐ°ÑÑÐµÑ ÑÐµÐ¿Ð»Ð¾Ð²Ð¾Ð¹ ÑÑÐµÐ¼Ñ, Ð¿ÑÐ¸Ð±Ð»Ð¸Ð¶ÐµÐ½Ð½ÑÐ¹ ÑÐ°ÑÑÐµÑ ÐºÐ¾Ð¼Ð¿ÑÐµÑÑÐ¾ÑÐ°, ÑÐ°ÑÑÐµÑ ÐºÐ°Ð¼ÐµÑÑ ÑÐ³Ð¾ÑÐ°Ð½Ð¸Ñ, ÑÐ°ÑÑÐµÑ ÑÑÑÐ±Ð¸Ð½Ñ ÐºÐ¾Ð¼Ð¿ÑÐµÑÑÐ¾ÑÐ° Ð¸ ÑÐ¸Ð»Ð¾Ð²Ð¾Ð¹ ÑÑÑÐ±Ð¸Ð½Ñ, Ð¿ÑÐ¾ÑÐ½Ð¾ÑÑÐ½Ð¾Ð¹ ÑÐ°ÑÑÐµÑ Ð»Ð¾Ð¿Ð°ÑÐºÐ¸, Ð´Ð¸ÑÐºÐ° Ð¸ ÑÐ¾ÑÐ¾ÑÐ° ÑÐ¸Ð»Ð¾Ð²Ð¾Ð¹ ÑÑÑÐ±Ð¸Ð½Ñ, Ð¾Ð¿Ð¸ÑÐ°Ð½Ð° ÐºÐ¾Ð½ÑÑÑÑÐºÑÐ¸Ñ ÑÑÑÐ°Ð½Ð¾Ð²ÐºÐ¸. Ð¢Ð°ÐºÐ¶Ðµ ÑÐ°ÑÑÐ¼Ð¾ÑÑÐµÐ½Ð¾ Ð²Ð»Ð¸ÑÐ½Ð¸Ðµ Ð²ÑÑÐ¾ÐºÐ¾ÑÐµÐ¼Ð¿ÐµÑÐ°ÑÑÑÐ½Ð¾Ð¹ ÐºÐ¾ÑÑÐ¾Ð·Ð¸Ð¸ Ð½Ð° Ð¿ÑÐ¾ÑÐ½Ð¾ÑÑÑ ÑÐ°Ð±Ð¾ÑÐ¸Ñ Ð»Ð¾Ð¿Ð°ÑÐ¾Ðº Ð¿Ð¾ÑÐ»ÐµÐ´Ð½ÐµÐ¹ ÑÑÑÐ¿ÐµÐ½Ð¸ ÑÐ²Ð¾Ð±Ð¾Ð´Ð½Ð¾Ð¹ ÑÑÑÐ±Ð¸Ð½Ñ.
description: Theme of final qualification work: Â«Turbo-shaft aircraft installation 1,3 MWÂ»In this work, the calculation of a turbo-shaft aircraft installation with a capacity of 1,3 MW. As a prototype, the gas turbine engine VK-2500 is used.The work presents the calculation of thermal scheme, approximate calculation of the compressor, calculation of the turbine, the calculations of the combustion chamber, the strength calculation of the blade, disk and rotor of the power turbine, the description of the installation design is performed. The influence of high-temperature corrosion on the blades of impeller of the last stage of a free turbine is also considered.
Constraints on standard and non-standard early Universe models from CMB B-mode polarization
Creators: name: Ma, Yin-Zhe
name: Zhao, Wen
name: Brown, Michael L.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We investigate the observational signatures of three models of the early Universe in the $B$-mode polarization of the Cosmic Microwave Background (CMB) radiation. In addition to the standard single field inflationary model, we also consider the constraints obtainable on the loop quantum cosmology model (from Loop Quantum Gravity) and on cosmic strings, expected to be copiously produced during the latter stages of Brane inflation. We first examine the observational features of the three models, and then use current $B$-mode polarization data from the BICEP and QUaD experiments to constrain their parameters. We also examine the detectability of the primordial $B$-mode signal predicted by these models and forecast the parameter constraints achievable with future CMB polarization experiments. We find that: (a) these three models of the early Universe predict different features in the CMB B-mode polarization power spectrum, which are potentially distinguishable from the CMB experiments; (b) since $B$-mode polarization measurements are mostly unaffected by parameter degeneracies, they provide the cleanest probe of these early Universe models; (c) using the BICEP and QUaD data we obtain the following parameter constraints: $r=0.02^{+0.31}_{-0.26}$ ($1σ$ for the tensor-to-scalar ratio in the single field inflationary model); $m < 1.36\times 10^{-8} \text{M}_{\text{pl}}$ and $k_{*} < 2.43 \times 10^{-4} \text{Mpc}^{-1}$ ($1σ$ for the mass and scale parameters in the loop quantum cosmology model); and $Gμ< 5.77 \times 10^{-7}$ ($1σ$ for the cosmic string tension); (d) future CMB observations (both satellite missions and forthcoming sub-orbital experiments) will provide much more rigorous tests of these early Universe models.
description: 41 pages, 23 figures, JCAP in Press
title: Uncertainty in GB electricity grid carbon intensity and its implications for carbon accounting and reporting
Creators: name: Papaioannou, Vasiliki
Publisher: name: University of Reading
Year: 2020

description: The electricity sector is one of the largest sources of greenhouse gas emissions and the study of electricity grid carbon intensity has a key role in meeting the Climate Change targets. Evaluation of grid carbon intensity, typically measured in gCO2eq/kWh, is fundamental to footprint calculation. The UK government (DEFRA) provides guidelines and annual grid carbon intensity figures for companies to report their emissions, but the use of a single annual value for grid carbon intensity introduces several key uncertainties into carbon assessment. This study examines the uncertainties that arise from using single annual values for carbon accounting and reporting purposes. Half-hourly UK grid carbon intensity values have been calculated and analysed for the years 2009-2017. Additionally, a power system (UC / ED) model of the GB power grid has been built. This model is being used to explore the sensitivities of grid carbon intensity to variable renewable energy and capacity assumptions. Grid carbon intensity is shown to widely vary not only inter-annually and intra-annually but also from one hour of generation to the next. Hence, the use of a single annual average figure raises doubts over the accuracy of the estimations. Finally, high resolution grid carbon intensity is being used to inform demand side management schemes and identify potential carbon benefits on the domestic and business level.
Proof of some conjectures of Z.-W. Sun on congruences for Apery polynomials
Creators: name: Guo, Victor J. W.
name: Zeng, Jiang
Publisher: name: arXiv
Year: 2011
Subjects: subject: Number Theory (math.NT)
subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 11A07, 11B65, 05A10, 05A19

description: The Apery polynomials are defined by $A_n(x)=\sum_{k=0}^{n}{n\choose k}^2{n+k\choose k}^2 x^k$ for all nonnegative integers $n$. We confirm several conjectures of Z.-W. Sun on the congruences for the sum $\sum_{k=0}^{n-1}(-1)^k(2k+1) A_k(x)$ with $x\in Z$.
description: 11 pages, to appear in Journal of Number Theory
Improving the methods to measure work productivity loss in caregivers
Creators: name: Gelfand, Aaron
Publisher: name: University of British Columbia
Year: 2021

description: This study aimed to: (a) adapt the previously validated Valuation of Lost Productivity (VOLP) questionnaire for people with health problems, to a caregiver version to measure work productivity loss associated with caregiving responsibilities, (b) evaluate measurement feasibility and validity of an online version of the caregiver VOLP questionnaire, and (c) compare two caregiver populations based on whether they worked from home. A mixed methods design was utilized. Qualitative methods were used for VOLP adaptation and online conversion. Quantitative methods were used to evaluate feasibility and validity of the online VOLP and compare the two caregiver groups. The Work Productivity and Activity Impairment (WPAI) questionnaire for caregivers was included to compare its outcomes and their correlations with VOLP outcomes. When adapting the VOLP for caregivers, our qualitative analysis showed the importance of adding three major components: caregiving time, work productivity loss related to volunteer activities and caregivers’ lost job opportunities. A total of 382 caregivers who completed online survey were included in our final quantitative analysis. We found small Spearman rank correlations between VOLP and WPAI, observing a larger correlation between absenteeism [r = 0.49 (95% confidence interval: 0.37–0.60)] than presenteeism [r = 0.36 (0.24–0.47)]. Correlations between VOLP outcomes and total caregiving hours were larger for absenteeism [r = 0.38 (0.27–0.47)] than presenteeism [r = 0.22 (0.10–0.34)]. Correlations between WPAI outcomes and total caregiving hours were smaller for absenteeism [r = 0.27 (0.15–0.38)] than presenteeism [r = 0.35 (0.23–0.46)]. When comparing caregivers who are working from home and those not working from home, differences in education, occupations and caregiver health status were observed. The VOLP absenteeism and presenteeism outcomes were significantly higher in caregivers working from home than caregivers not working from home, with small effect sizes from 0.16 to 0.19. This was not the case with the WPAI outcomes. The study provides evidence of the feasibility and preliminary validity evidence of the adapted VOLP caregiver questionnaire in measuring work productivity loss due to caregiving responsibilities, when compared with the results for WPAI and results from the previous patient-VOLP validation study.
Giant superlinear power dependence of photocurrent based on layered Ta$_2$NiS$_5$ photodetector
Creators: name: Meng, Xianghao
name: Du, Yuhan
name: Wu, Wenbin
name: Joseph, Nesta Benno
name: Deng, Xing
name: Wang, Jinjin
name: Ma, Jianwen
name: Shi, Zeping
name: Liu, Binglin
name: Ma, Yuanji
name: Yue, Fangyu
name: Zhong, Ni
name: Xiang, Ping-Hua
name: Zhang, Cheng
name: Duan, Chun-Gang
name: Narayan, Awadhesh
name: Sun, Zhenrong
name: Chu, Junhao
name: Yuan, Xiang
Publisher: name: arXiv
Year: 2022
Subjects: subject: Applied Physics (physics.app-ph)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Photodetector based on two-dimensional (2D) materials is an ongoing quest in optoelectronics. These 2D photodetectors are generally efficient at low illuminating power but suffer severe recombination processes at high power, which results in the sublinear power dependence of photoresponse and lower optoelectronic efficiency. The desirable superlinear photocurrent is mostly achieved by sophisticated 2D heterostructures or device arrays, while 2D materials rarely show intrinsic superlinear photoresponse. Here, we report the giant superlinear power dependence of photocurrent based on multi-layer Ta$_2$NiS$_5$. While the fabricated photodetector exhibits good sensitivity ($3.1 mS/W$ per square) and fast photoresponse ($31 μ$$s$), the bias-, polarization-, and spatial-resolved measurements point to an intrinsic photoconductive mechanism. By increasing the incident power density from $1.5 μ$W/$μ$$m^{2}$ to $200 μ$W/$μ$$m^{2}$, the photocurrent power dependence varies from sublinear to superlinear. At higher illuminating conditions, a prominent superlinearity is observed with a giant power exponent of $γ=1.5$. The unusual photoresponse can be explained by a two-recombination-center model where the distinct density of states of the recombination centers effectively closes all recombination channels. The fabricated photodetector is integrated into camera for taking photos with enhanced contrast due to the superlinearity. Our work provides an effective route to enable higher optoelectronic efficiency at extreme conditions.
title: Long-term impacts of mid-Holocene drier climatic conditions on Bolivian tropical dry forests
Creators: name: Plumpton, Heather
Publisher: name: University of Reading
Year: 2020

description: Dry forests are the most threatened tropical biome in South America, with only 10% of their original cover remaining. Chapter 1 reviews literature on tropical dry forests and palaeoecology to demonstrate why the impact of the drier climatic conditions predicted for much of South America in the coming century on these forests is uncertain. This thesis uses the mid-Holocene (6000 years BP) drier climatic period to provide insight into the long-term ecological responses of tropical dry forest to drier conditions. One of the reasons for uncertainty over the impacts of the mid-Holocene drier climate on these forests is the lack of large lakes from which to draw palaeoecological records. The large lakes that do exist within the dry forest biome in Bolivia are situated in complex catchments with hydrological connections to tropical wetlands. In this thesis we therefore first develop our understanding of a relatively new palaeoecological proxy –phytoliths –to assist in our interpretation of the mid-Holocene palaeo-vegetation record. Chapter 2 demonstrates the palaeoecological potential of phytoliths from lake sediments, including the first empirical evidence that phytoliths from lakes most strongly represent local vegetation. Chapter 3 builds on these findings to investigate the sensitivity of phytoliths to vegetation changes within key Bolivian ecosystems, and compares it to pollen, showing that phytoliths are most sensitive to changes within ecosystems with strong herbaceous components such as forest understories. Chapter 4 uses the results of the previous chapters to investigate the response of the Bolivian dry forest to mid-Holocene drier climatic conditions, demonstrating resilience of the dry forest as a biome, with a shift in composition towards more drought-tolerant taxa. However, savannah encroachment did occur at the ecotone during the mid-Holocene, with fire identified as potentially reinforcing the ecotone shift. The vulnerability of tropical dry forests to future climate change will therefore depend on complex interactions between climate, fire and human land-use.
title: ÐÑÐ¾ÐµÐºÑ Ð²Ð½ÐµÐ´ÑÐµÐ½Ð¸Ñ CRM-ÑÐ¸ÑÑÐµÐ¼Ñ Ð´Ð»Ñ Ð¿ÑÐµÐ´Ð¿ÑÐ¸ÑÑÐ¸Ñ ÑÐ»ÐµÐºÑÑÐ¾ÑÐµÑ Ð½Ð¸ÑÐµÑÐºÐ¾Ð¹ Ð¾ÑÑÐ°ÑÐ»Ð¸
title: Ð²ÑÐ¿ÑÑÐºÐ½Ð°Ñ ÐºÐ²Ð°Ð»Ð¸ÑÐ¸ÐºÐ°ÑÐ¸Ð¾Ð½Ð½Ð°Ñ ÑÐ°Ð±Ð¾ÑÐ° Ð±Ð°ÐºÐ°Ð»Ð°Ð²ÑÐ°
titleType: Subtitle
title: CRM-system implementation project for an enterprise electrical industry
Creators: name: ÐÐ¾Ð»Ð¸Ð½ÑÐºÐ¸Ð¹, ÐÐ¸ÑÐ°Ð¸Ð»
Publisher: name: Ð¡Ð°Ð½ÐºÑ-ÐÐµÑÐµÑÐ±ÑÑÐ³ÑÐºÐ¸Ð¹ Ð¿Ð¾Ð»Ð¸ÑÐµÑÐ½Ð¸ÑÐµÑÐºÐ¸Ð¹ ÑÐ½Ð¸Ð²ÐµÑÑÐ¸ÑÐµÑ ÐÐµÑÑÐ° ÐÐµÐ»Ð¸ÐºÐ¾Ð³Ð¾
Year: 2023
Subjects: CRM-ÑÐ¸ÑÑÐµÐ¼Ð°
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CRM-system
implementation project
comprehensive assessment of indicators
automation
customer-oriented system

description: Ð Ð°Ð·ÑÐ°Ð±Ð¾ÑÐ°Ð½ Ð¿ÑÐ¾ÐµÐºÑ Ð²Ð½ÐµÐ´ÑÐµÐ½Ð¸Ñ CRM-ÑÐ¸ÑÑÐµÐ¼Ñ Ð´Ð»Ñ Ð¿ÑÐµÐ´Ð¿ÑÐ¸ÑÑÐ¸Ñ ÑÐ»ÐµÐºÑÑÐ¾ÑÐµÑÐ½Ð¸ÑÐµÑÐºÐ¾Ð¹ Ð¾ÑÑÐ°ÑÐ»Ð¸ Ñ ÑÐµÐ»ÑÑ ÑÐ¾ÐºÑÐ°ÑÐµÐ½Ð¸Ñ Ð²ÑÐµÐ¼ÐµÐ½Ð¸ Ð¾Ð±ÑÐ»ÑÐ¶Ð¸Ð²Ð°Ð½Ð¸Ñ ÐºÐ»Ð¸ÐµÐ½ÑÐ¾Ð² Ð¸ Ð½ÐµÑÐ°ÑÐ¸Ð¾Ð½Ð°Ð»ÑÐ½Ð¾Ð³Ð¾ Ð¸ÑÐ¿Ð¾Ð»ÑÐ·Ð¾Ð²Ð°Ð½Ð¸Ñ Ð¸Ð½ÑÐ¾ÑÐ¼Ð°ÑÐ¸Ð¸. ÐÐ°Ð½Ð° ÑÐ°ÑÐ°ÐºÑÐµÑÐ¸ÑÑÐ¸ÐºÐ° Ð¿ÑÐµÐ´Ð¿ÑÐ¸ÑÑÐ¸Ñ, Ð¿ÑÐ¾Ð²ÐµÐ´ÑÐ½ ÑÑÑÐ°ÑÐµÐ³Ð¸ÑÐµÑÐºÐ¸Ð¹ Ð°Ð½Ð°Ð»Ð¸Ð· Ð¸ Ð²ÑÑÐ²Ð»ÐµÐ½Ñ Ð¾ÑÐ½Ð¾Ð²Ð½ÑÐµ Ð¿ÑÐ¾Ð±Ð»ÐµÐ¼Ñ. ÐÐ»Ñ ÑÐµÑÐµÐ½Ð¸Ñ Ð¿ÑÐ¾Ð±Ð»ÐµÐ¼ Ð¿ÑÐµÐ´Ð»Ð¾Ð¶ÐµÐ½ Ð¿ÑÐ¾ÐµÐºÑ Ð²Ð½ÐµÐ´ÑÐµÐ½Ð¸Ñ CRM-ÑÐ¸ÑÑÐµÐ¼. Ð Ð°ÑÑÐ¼Ð¾ÑÑÐµÐ½Ñ Ð¾Ð±ÑÐ¸Ðµ Ð¿Ð¾Ð½ÑÑÐ¸Ñ Ð¸ ÐºÐ»Ð°ÑÑÐ¸ÑÐ¸ÐºÐ°ÑÐ¸Ð¸ CRM-ÑÐ¸ÑÑÐµÐ¼, Ð²ÑÑÐ²Ð»ÐµÐ½Ñ ÑÑÐµÐ±Ð¾Ð²Ð°Ð½Ð¸Ñ Ðº CRM-ÑÐ¸ÑÑÐµÐ¼Ðµ Ð¸ Ð¿ÑÐ¾Ð²ÐµÐ´ÐµÐ½ Ð¸Ñ Ð°Ð½Ð°Ð»Ð¸Ð·. ÐÑÐ±ÑÐ°Ð½Ð° CRM-ÑÐ¸ÑÑÐµÐ¼Ð° Ð´Ð»Ñ Ð²Ð½ÐµÐ´ÑÐµÐ½Ð¸Ñ Ñ Ð¿Ð¾Ð¼Ð¾ÑÑÑ Ð¾ÑÐµÐ½ÐºÐ¸ ÐºÐ¾Ð¼Ð¿Ð»ÐµÐºÑÐ½ÑÑ Ð¿Ð¾ÐºÐ°Ð·Ð°ÑÐµÐ»ÐµÐ¹, Ð° ÑÐ°ÐºÐ¶Ðµ Ð¿ÑÐµÐ´ÑÑÐ°Ð²Ð»ÐµÐ½Ð¾ ÐµÐ³Ð¾ ÑÐ¸Ð½Ð°Ð½ÑÐ¾Ð²Ð¾Ðµ Ð¾Ð±Ð¾ÑÐ½Ð¾Ð²Ð°Ð½Ð¸Ðµ. ÐÑÐ¿Ð¾Ð»Ð½ÐµÐ½ Ð»Ð¾Ð³Ð¸ÐºÐ¾-ÑÑÑÑÐºÑÑÑÐ½ÑÐ¹ Ð°Ð½Ð°Ð»Ð¸Ð· Ð¿ÑÐ¾ÐµÐºÑÐ°. ÐÑÐ¿Ð¾Ð»Ð½ÐµÐ½ Ð°Ð½Ð°Ð»Ð¸Ð· ÑÐ¸ÑÐºÐ¾Ð² Ð¿ÑÐ¾ÐµÐºÑÐ° Ð¸ Ð¿ÑÐµÐ´ÑÑÐ°Ð²Ð»ÐµÐ½Ð¾ ÐµÐ³Ð¾ ÑÐ¸Ð½Ð°Ð½ÑÐ¾Ð²Ð¾Ðµ Ð¾Ð±Ð¾ÑÐ½Ð¾Ð²Ð°Ð½Ð¸Ðµ.
description: A project has been developed for the implementation of a CRM system for an electrical engineering enterprise in order to reduce customer service time and waste of information. The characteristics of the enterprise are given, a strategic analysis is carried out and the main problems are identified. To solve the problems, a project for the implementation of CRM systems was proposed. The general concepts and classifications of CRM-systems are considered, the requirements for the CRM-system are identified and their analysis is carried out. A CRM system was selected for implementation by assessing complex indicators, and its financial justification was also presented. A logical and structural analysis of the project was carried out. The risk analysis of the project has been carried out and its financial justification has been presented.
Alpha Antihydrogen Experiment
Creators: name: ALPHA Collaboration
name: Fujiwara, M. C.
name: Andresen, G. B.
name: Ashkezari, M. D.
name: Baquero-Ruiz, M.
name: Bertsche, W.
name: Bray, C. C.
name: Butler, E.
name: Cesar, C. L.
name: Chapman, S.
name: Charlton, M.
name: Cesar, C. L.
name: Fajans, J.
name: Friesen, T.
name: Gill, D. R.
name: Hangst, J. S.
name: Hardy, W. N.
name: Hayano, R. S.
name: Hayden, M. E.
name: Humphries, A. J.
name: Hydomako, R.
name: Jonsell, S.
name: Kurchaninov, L.
name: Lambo, R.
name: Madsen, N.
name: Menary, S.
name: Nolan, P.
name: Olchanski, K.
name: Olin, A.
name: Povilus, A.
name: Pusa, P.
name: Robicheaux, F.
name: Sarid, E.
name: Silveira, D. M.
name: So, C.
name: Storey, J. W.
name: Thompson, R. I.
name: van der Werf, D. P.
name: Wilding, D.
name: Wurtele, J. S.
name: Yamazaki, Y.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: High Energy Physics - Experiment (hep-ex)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Atomic Physics (physics.atom-ph)
subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: ALPHA is an experiment at CERN, whose ultimate goal is to perform a precise test of CPT symmetry with trapped antihydrogen atoms. After reviewing the motivations, we discuss our recent progress toward the initial goal of stable trapping of antihydrogen, with some emphasis on particle detection techniques.
description: Invited talk presented at the Fifth Meeting on CPT and Lorentz Symmetry, Bloomington, Indiana, June 28-July 2, 2010
title: Suiting the action to the word: examining genre film remediations of Shakespeare’s plays
Creators: name: Pope, Lucinda
Publisher: name: University of Reading
Year: 2022

description: My research is interested in examining the remediated forms of the Shakespeare genre film. In order to achieve this, my thesis asks the following question: “Why Shakespeare in this Form?” The research question interrogates how the adaptation of Shakespeare’s playtexts speaks through the iconographic codes and conventions of cinematic genres, and why the genre film provides such a rich vehicle for Shakespeare. It is my purpose to examine and establish the artistic, narrative and structural correlations between Shakespeare’s dramatic form (the narrative and theatrical codes, and conventions) and those popular cinema genres which remediate Shakespeare’s narratives (visual icons, narrative tropes, conventions which travel across media boundaries). Representing the playtexts through the narrative codes, conventions and iconography of popular Hollywood film genres, the remediated Shakespeare genre film produces, in Neale’s words, a ‘multi-faceted phenomenon’ (2000: 25). Directing the players newly arrived in Elsinore, Hamlet advises that their performance should ‘Suit the action to the word, the word to the action’ (H.III.ii.17-18). This thesis examines how the reflexively remediated Shakespeare genre film responds to questions of suiting the iconographies of the action of cinema to the words and verbal imagery of Shakespeare’s playtexts. Direction for this research is provided by examinations focusing upon sequences of demonstrable depicted action (scenes of gestural movement), described action (the transposition of verbal imagery into genre convention), iconographic themes or leitmotifs (devices representative of narrative meaning), and plot (or narrative). What transpires is the result of merging early modern dramatic traditions with cinematic conventions of filmic narrativity and exploits the capabilities of the cinematic medium to produce a spectacle of remediation. Examining the narrative and audio-visual correlations between Shakespeare’s plays and their remediated genre vehicles involves analysing the dynamism of performed action, the aestheticism of narrative action, and the entertainment contexts in which the adaptations were made, as well as engaging with scholarly debates about the same.
title: Fast retrieval of weather analogues in a multi-petabyte meteorological archive
Creators: name: Raoult, Baudouin
Publisher: name: University of Reading
Year: 2020

description: The European Centre for Medium-Range Weather Forecasts (ECMWF) manages the largest archive of meteorological data in the world. At the time of writing, it holds around 300 petabytes and grows at a rate of 1 petabyte per week. This archive is now mature, and contains valuable datasets such as several reanalyses, providing a consistent view of the weather over several decades. Weather analogue is the term used by meteorologists to refer to similar weather situations. Looking for analogues in an archive using a brute force approach requires data to be retrieved from tape and then compared to a user-provided weather pattern, using a chosen similarity measure. Such an operation would be very long and costly. In this work, a wavelet-based fingerprinting scheme is proposed to index all weather patterns from the archive, over a selected geographical domain. The system answers search queries by computing the fingerprint of the query pattern and looking for close matched in the index. Searches are fast enough that they are perceived as being instantaneous. A web-based application is provided, allowing users to express their queries interactively in a friendly and straightforward manner by sketching weather patterns directly in their web browser. Matching results are then presented as a series of weather maps, labelled with the date and time at which they occur. The system has been deployed as part of the Copernicus Climate Data Store and allows the retrieval of weather analogues from ERA5, a 40-years hourly reanalysis dataset. Some preliminary results of this work have been presented at the International Conference on Computational Science 2018 (Raoult et al. (2018)).
“I would prefer not to” : nonhuman animal resistance and the language of speciesism
Creators: name: Wafler, Leah
Publisher: name: University of British Columbia
Year: 2021

description: Substantial scholarship on nonhuman cognition suggests that the animals we exploit are consciously aware of their own experiences, whether they be of pain or pleasure. Yet, there is a prevailing assumption that these beings are not aware of and do not resist against their own abuse, which provides convenient language for justifying the atrocities of the factory farming and animal entertainment industries. Through disingenuous public relations strategies, these industries convince the public all is well, while the animals themselves, and their agencies, are concealed from view. However, when nonhumans escape, attack, or even kill humans complicit in their domination, cognitive hoop jumping becomes evident, illustrating distinct conceptual difficulties in consolidating visibly agential actions of animals with their dominant representations as passive and disinterested in their exploitation. In this way, nonhumans’ resistant actions bring to light vulnerabilities in the Western status quo’s speciesist visage. Firmly situated in the field of Critical Animal Studies (CAS), my thesis engages with several case studies of nonhumans who escape captivity or attack humans to argue that not only do animals resist agentially but also that the dominant language used to represent their resistance is speciesist and must be problematized by a purposeful recognition of nonhuman agency. First, I analyze three cases of escaped cows in terms of the distancing strategies at play in the media and public response. Following, I explore the discourse of captive animal resistance by looking at the controversy surrounding Tilikum the orca and his involvement in the deaths of three humans. Ultimately, this thesis demonstrates the significance of and acts as a starting point for tracking the various distancing strategies and narratives in Western discourses on nonhuman resistance.
Quiver Yangians and $\mathcal{W}$-Algebras for Generalized Conifolds
Creators: name: Bao, Jiakang
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We focus on quiver Yangians for most generalized conifolds. We construct a coproduct of the quiver Yangian following the similar approach by Guay-Nakajima-Wendlandt. We also prove that the quiver Yangians related by Seiberg duality are indeed isomorphic. Then we discuss their connections to $\mathcal{W}$-algebras analogous to the study by Ueda. In particular, the universal enveloping algebras of the $\mathcal{W}$-algebras are truncations of the quiver Yangians, and therefore they naturally have truncated crystals as their representations.
description: 67 pages; v3: minor corrections
title: What is the effect of contextualised grammar teaching using Functional Linguistics strategies on the understanding of Year 9 learners in writing tasks?
Creators: name: Speed, Harriet
Publisher: name: University of Reading
Year: 2020

description: This thesis presents an investigation into the effects of teaching grammar in a contextualised manner on the writing of Year 9 pupils. It explores the ways in which grammar can be taught as part of a pedagogy which seeks to use Functional Linguistics, more specifically Systemic Functional Linguistics and Cognitive Grammar, as an accessible pedagogy in the classroom. The study used a case-study methodology to explore the impact of teaching grammar using Functional Linguistics strategies on the writing of Year 9 pupils. The study focused on two intervention lessons which introduced grammatical concepts in a contextualised manner. These lessons were recorded and analysed according to the links that participants made between the intervention lessons and the writing which they completed post-intervention. Participants from a whole year group from the target site were included in the section of the study which analysed writing samples. A smaller sample of participants also took part in a ‘think aloud’ section of the study which included recording these participants as they were verbally considering how to construct their pieces of writing. These data were analysed to explore the impact of the teaching strategies used on participants’ metalinguistic understanding. The findings are presented using Systemic Functional Linguistics as a model which explores the participants’ understanding of the writing task. The study is significant in considering how the metalinguistic understanding of pupils can be enhanced using pedagogies related to Functional Linguistics. It also provides a current method of teaching grammar using a pedagogy which is multifaceted and responds to teachers’ calls for the further provision of accessible grammatical pedagogies. It also allows for suggestions to be made as to further advancements which are required in policy and training.
Photospheric activity, rotation, and star-planet interaction of the planet-hosting star CoRoT-6
Creators: name: Lanza, A. F.
name: Bonomo, A. S.
name: Pagano, I.
name: Leto, G.
name: Messina, S.
name: Cutispoto, G.
name: Moutou, C.
name: Aigrain, S.
name: Alonso, R.
name: Barge, P.
name: Deleuil, M.
name: Fridlund, M.
name: Silva-Valio, A.
name: Auvergne, M.
name: Baglin, A.
name: Cameron, A. Collier
Publisher: name: arXiv
Year: 2010
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: The CoRoT satellite has recently discovered a hot Jupiter that transits across the disc of a F9V star called CoRoT-6 with a period of 8.886 days. We model the photospheric activity of the star and use the maps of the active regions to study stellar differential rotation and the star-planet interaction. We apply a maximum entropy spot model to fit the optical modulation as observed by CoRoT during a uninterrupted interval of about 140 days. Photospheric active regions are assumed to consist of spots and faculae in a fixed proportion with solar-like contrasts. Individual active regions have lifetimes up to 30-40 days. Most of them form and decay within five active longitudes whose different migration rates are attributed to the stellar differential rotation for which a lower limit of ΔΩ/ Ω= 0.12 \pm 0.02 is obtained. Several active regions show a maximum of activity at a longitude lagging the subplanetary point by about 200 degrees with the probability of a chance occurrence being smaller than 1 percent. Our spot modelling indicates that the photospheric activity of CoRoT-6 could be partially modulated by some kind of star-planet magnetic interaction, while an interaction related to tides is highly unlikely because of the weakness of the tidal force.
description: 9 pages, 7 figures, accepted to Astronomy & Astrophysics
Dynamic population of multiexcitation subradiant states in incoherently excited atomic arrays
Creators: name: Rubies-Bigorda, Oriol
name: Ostermann, Stefan
name: Yelin, Susanne F.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The deterministic generation of multiexcitation subradiant states proves to be challenging. Here, we present a viable path towards their transient generation in finite-sized ordered arrays of dipole-dipole coupled quantum emitters, based on incoherent driving of the atomic ensemble. In particular, we show that a maximal coupling to long-lived subradiant states is achieved if only half of the atoms are initially excited. We characterize the nature of the resulting states by calculating the dynamic fluorescence spectrum of the emitted light. Finally, we elucidate the role of coherent interactions during the decay process of sufficiently dense atomic arrays, which result in a coherently driven radiation burst that leads to a subsequent reduction of the chances to prepare multiexcitation subradiant states.
description: Main text: 6 pages, 3 figures. Supplemental material: 6 pages, 5 figures