cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
title: The application of performance indicators to quality assessment and audit in higher education
Creators: name: Clare, Christopher Philip
Publisher: name: The Open University
Year: 2005

description: This report describes research to investigate whether the use of performance indicators could improve, enrich or enhance the process of academic quality review. It uses a new technique based on soft systems methodology and developed by researchers at London South Bank University. This technique, referred to as the Holon methodology, has been adapted from the domain of software quality assurance and can be used to help develop performance indicators from successive refinement of the vision of a "desired state" of various stakeholders within a system. The research does not assume the existence of any particular system of quality assessment or audit but starts from first principles, through a literature review of work on both quality assessment and audit, and on the use of performance indicators in higher education. The main phase of the research is a series of interviews with academic staff and students to elicit views on what constitutes a high quality student experience. Seven performance indicators are produced and the research also addresses the use of quality assurance terms and techniques from outside higher education. The suitability and limitations of the methodology are also discussed.
An analytic treatment of the Gibbs-Pareto behavior in wealth distribution
Creators: name: Das, Arnab
name: Yarlagadda, Sudhakar
Publisher: name: arXiv
Year: 2004
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Other Condensed Matter (cond-mat.other)
subject: General Finance (q-fin.GN)
subject: FOS: Physical sciences
subject: FOS: Economics and business

description: We develop a general framework, based on Boltzmann transport theory, to analyze the distribution of wealth in societies. Within this framework we derive the distribution function of wealth by using a two-party trading model for the poor people while for the rich people a new model is proposed where interaction with wealthy entities (huge reservoir) is relevant. At equilibrium, the interaction with wealthy entities gives a power-law (Pareto-like) behavior in the wealth distribution while the two-party interaction gives a Boltzmann-Gibbs distribution.
description: 5 pages, 3 figures, accepted in Physica A
H I gas in higher density regions of the intergalactic medium
Creators: name: Misawa, T.
name: Tytler, D.
name: Iye, M.
name: Paschos, P.
name: Norman, M.
name: Kirkman, D.
name: O'Meara, J.
name: Suzuki, N.
name: Kashikawa, N.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Using H I absorption alone, we attempt to separate H I absorption lines in quasar spectra into two categories; HDLs (Higher Density Lines) and LDLs (Lower Density Lines), and we discuss the difference in their physical properties. We deblend and fit all H I lines with Voigt profiles, and make an unbiased sample of H I lines covering a wide column density range (12 < log N_HI < 19 cm^-2). To reduce the influence of line blending, we simultaneously fit several Lyman series lines. As a result of a two-point correlation analysis, we found that higher column density H I lines are clustering at $Δ$ v < 200 km/s, while lower ones at $Δ$ v < 100 km/s. We define HDLs as H I lines with 15 < log N_HI < 19 cm^-2 and all H I lines within +/- 200 km/s of a line with log N_HI > 15 cm^-2, and LDLs as others with 12 < log N_HI < 15 cm^-2. We found that the HDLs have smaller minimum b-values for a given column density than the LDLs. This difference is successfully reproduced by our Hydrodynamic simulation. The LDLs seem to be cool or shock-heated diffuse IGM gas, while the HDLs are likely to be cooler dense gas near to galaxies.
description: 22 pages, 7 figures, accepted for publication in the Astronomical Journal
title: Talking about science? A study of the nature of discussion carried out when students work in small groups in the secondary science classroom
Creators: name: Tinker, Jane Marie
Publisher: name: The Open University
Year: 2006

description: This research focuses on small group work and talk in the science classroom. Peer collaboration is considered important in supporting learning and as a means of generating cognitive conflict in the science classroom for the individual; often the social aspects of this collaboration are overlooked. There is little practitioner research in this area and this project seeks to describe, in detail, the classroom talk carried out by two groups: Group A, a single sex group of boys and Group B, a mixed sex group. It focuses on the type of talk carried out by the students using the categories of. exploratory, cumulative, disputational, off task and technical talk and examines the impact that these have on learning and group relationships. Social roles and their impact on classroom talk and learning are also examined; adopting different social roles being the means by which differential expertise and scaffolding develops within the groups. Gender issues are also examined when students work in small groups in the classroom. All of the above analysis helps to describe these groups in detail and go on to put together a framework of advice for teachers in the classroom on the setting up and monitoring of small group work to maximise the potential, small group work has, for the development of conceptual understanding in science.
title: 02_0091
Creators: name: Wesley Baldwin, John
name: Baldwin, John W.
Publisher: name: NAKALA - https://nakala.fr (Huma-Num - CNRS)
publisherIdentifier: https://ror.org/04ces3204
publisherIdentifierScheme: ROR
Year: 2018
Subjects: subject: LaMOP
subject: Laboratoire de Médiévistique Occidentale de Paris

description: L'ensemble de ces notes ont été crée par John Baldwin lors d'une de ses premières périodes de résidence à Paris. Ces documents comprennent tous les magistri qu’il avait pu rencontrer dans ses sources. Aux XIIème et XIIIème siècles, les universités n'existant pas encore, le titre de magister s'il évoque certainement une compétence n'est pas rattaché de façon systématique au passage par les écoles. De surcroît, les magistris sont le plus souvent désignés par leur seul prénom. La lecture de ces données est donc difficile et suppose un long travail pour tenter d'identifier un individu auquel on pourrait rattacher plusieurs mentions. John Baldwin avait donc renoncé à utiliser ces données pour donner un prolongement à sa magnifique étude sur les gradués d'université et leur emploi par les Capétiens et les Plantagenêts. Néanmoins, il a conservé ces données et elles sont potentiellement très utile dans le cadre de Studium, comme le sont toutes les mentions dans les volumes des Fasti Ecclesiae Gallicanae de chanoines portant ce titre de magister sans autres précisions. L'ampleur des dépouillements rend ces données très utiles et nous devons une grande reconnaissance à John Baldwin pour avoir pris la peine de faire photocopier ses fiches et de nous les avoir transmises amicalement.
Les données ainsi que les images des fiches sont accessibles sur le site Internet à l'adresse suivante : http://studium-baldwin.lamop.fr/.
Les transcriptions des fiches ont été effectuées par des étudiants de Paris 1 Panthéon - Sorbonne mais elles n'ont pas été corrigées par la suite.
description: Relation: https://lamop.hypotheses.org/
Probing neutrino quantum decoherence at reactor experiments
Creators: name: de Gouvêa, André
name: De Romeri, Valentina
name: Ternes, Christoph A.
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We explore how well reactor antineutrino experiments can constrain or measure the loss of quantum coherence in neutrino oscillations. We assume that decoherence effects are encoded in the size of the neutrino wave-packet, $σ$. We find that the current experiments Daya Bay and the Reactor Experiment for Neutrino Oscillation (RENO) already constrain $σ>1.0\times 10^{-4}$ nm and estimate that future data from the Jiangmen Underground Neutrino Observatory (JUNO) would be sensitive to $σ<2.1\times 10^{-3}$ nm. If the effects of loss of coherence are within the sensitivity of JUNO, we expect $σ$ to be measured with good precision. The discovery of nontrivial decoherence effects in JUNO would indicate that our understanding of the coherence of neutrino sources is, at least, incomplete.
description: 11 pages, 8 figures, Version 2, matches published version
title: Improving the management of prison-based education staff through an examination of multi-agency psychological contracts
Creators: name: Mills, Julie
Publisher: name: The Open University
Year: 2006

description: This study is set in the context of prison education. Contracted-out employment arrangements are becoming increasingly common and prison education services were put out to tender in 1993. Currently 27 contractors are responsible for education provision within the 138 state run prisons in England and Wales. One consequence of this employment arrangement is that prison-based education staff, working often exclusively within a prison, are employed by an organisation that is not necessarily geographically close to the prison in which they work. This study explores this employment relationship in the context of the psychological contract through investigating the contents of the psychological contracts of prison-based education staff perceived with their employer and with the host prison. Eighty-five semi-structured interviews, carried out across eleven prisons, used the critical incident technique to uncover prison-based education staff's perceptions of the obligations owed to them by their employer and by the host prison along with their perceptions of the obligations owed by themselves to their employer and to the host prison. Content analysis was carried out on the interview transcripts to reveal a hybrid psychological contract including relational and transactional items with both the employer and the host prison. The results suggest that prison-based education teams develop a strong sense of team identity and demonstrate their commitment to the team through pro-social behaviour in the form of team citizenship. There is also evidence that suggests prison-based education teams operate in a culture of intergroup differentiation which has implications for the way in which prison-education teams are managed. The academic contributions made by the study along with strategic implications for organisations employing prison-based education teams are discussed and recommendations for practice, both strategic and operational are made.
Investigation of Quantum Droplet: An Analytical Approach
Creators: name: Debnath, Argha
name: Khan, Ayan
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Pattern Formation and Solitons (nlin.PS)
subject: FOS: Physical sciences

description: Recent observations of droplets in dipolar and binary Bose-Einstein condensate (BEC) motivates us to study the theory of droplet formation in detail. Precisely, we are interested in investigating the possibility of droplet formation in a quasi-one-dimensional geometry. The recent observations have concluded that the droplets are stabilized by the competition between effective mean-field and beyond mean-field interaction. Hence, it is possible to map the effective equation of motion to a cubic-quartic nonlinear Schrödinger equation (CQNLSE). We obtain two analytical solutions of the modified Gross-Pitaevskii equation or CQNLSE and verified them numerically. Based on their stability we investigate the parameter regime for which droplets can form. The effective potential allows us to conclude about the regions of soliton domination and self-bound droplet formations.
description: To appear in Annalen der Physik
Deconfinement and Chiral Restoration in Hot and Dense Matter
Creators: name: Fukushima, Kenji
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: We propose a picture that the chiral phase transition at zero quark mass and the deconfinement transition at infinite quark mass are continuously connected. This gives a simple interpretation on the coincidence of the pseudo-critical temperatures observed in lattice QCD. We discuss a possible dynamical mechanism behind the simultaneous crossovers and show the results in a model study.
description: Contributed to the XXII International Symposium on Lattice Field Theory (Lattice2004(nonzero)), Batavia, Illinois, Jun 21-26, 2004
title: The construction of a model of qualitative evaluation to support the development of the policy and practice of measuring student satisfaction in a higher education institution
Creators: name: Townley, Peter
Publisher: name: The Open University
Year: 2005

description: The dissertation is an analysis of the methods used for the measurement of student satisfaction in Higher Education (HE) in the United Kingdom and draws on evidence from Europe, Australia and the USA. The prevalent measurement system is quantitative via the application of surveys. This predominance has been influenced by developments as indicated in marketing literature and adopted widely by manufacturing and service businesses. It is considered appropriate, according to this model, to consider students as customers of the service - HE. There is increasing formalisation of the survey system because of its adoption as part of audit procedures set up by the QAA. This formalisation is raising the status of student satisfaction on the quality agenda of HE managers. The research study was designed to establish whether it is practicable to develop a qualitative based evaluation model. The model was developed using a grounded theory methodology. The application of grounded theory is problematic because of its complexity and the variety of interpretations as indicated by academic literature. The issues concerned in adapting the methodology are considered as part of the methodological literature review. The process of adaptation was both iterative and evolutionary in nature. Field research involving the application of the model was undertaken in two separate HE institutions - Colleges A and B. The research in College A was completed over a two-year period. Grounded theory techniques were trialled but were judged incomplete. The research in College B was undertaken in a much shorter time of two months and involved the application of a fully developed grounded theory technique. In both colleges, reports were produced for the consideration of senior managers in each college. The grounded theory analysis revealed two separate but related core categories. In College A, the core was Communication Problems and in College B, Issues relating to Empathy with Students. The cores were derived from an analysis that made use of a constant comparative method of examining themes and categories to produce an integrative category that explained the main determinant(s) of student satisfaction. The methodology, through adaptation provides information that allows HE managers to understand how students experience service quality. In this respect, it has the potential to explain the statistics generated by satisfaction surveys. The study culminated in the production of The Student Satisfaction Evaluation Tool (SSET). This tool was developed from an adaptation of grounded theory techniques.
Synthesizing Optimal Collective Algorithms
Creators: name: Cai, Zixian
name: Liu, Zhengyang
name: Maleki, Saeed
name: Musuvathi, Madan
name: Mytkowicz, Todd
name: Nelson, Jacob
name: Saarikivi, Olli
Publisher: name: arXiv
Year: 2020
Subjects: subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: FOS: Computer and information sciences

description: Collective communication algorithms are an important component of distributed computation. Indeed, in the case of deep-learning, collective communication is the Amdahl's bottleneck of data-parallel training. This paper introduces SCCL (for Synthesized Collective Communication Library), a systematic approach to synthesize collective communication algorithms that are explicitly tailored to a particular hardware topology. SCCL synthesizes algorithms along the Pareto-frontier spanning from latency-optimal to bandwidth-optimal implementations of a collective. The paper demonstrates how to encode SCCL's synthesis as a quantifier-free SMT formula which can be discharged to a theorem prover. We further demonstrate how to scale our synthesis by exploiting symmetries in topologies and collectives. We synthesize and introduce novel latency and bandwidth optimal algorithms not seen in the literature on two popular hardware topologies. We also show how SCCL efficiently lowers algorithms to implementations on two hardware architectures (NVIDIA and AMD) and demonstrate competitive performance with hand optimized collective communication libraries.
description: Both Zixian Cai and Zhengyang Liu contributed equally to the paper. The work was done during internships at Microsoft Research. To appear at PPoPP 2021
Actancial Matrices
Creators: name: Carlos Mario, Betancurth Becerra
name: Paula Andrea, Rendón Cardona
Publisher: name: Zenodo
Year: 2024

description: These schemes emphasize lexicometric positioning as preparation for conducting a narrative analysis based on the Greimas schema, establishing a narrative transition from the speakers' intentions to the actants.

The funding for this research, carried out by the Universidad Católica de Pereira, was supported by the Ministry of Science, Technology, and Innovation (MinCiencias) and the Commission for Communications Regulation (CRC). This support is framed within the scope of Call 908 of 2021, titled "New knowledge, technological development, and innovation for the strengthening of the ICT, postal, and audiovisual content sectors."
Early-type galaxies in the Coma cluster: a new piece in the calcium puzzle
Creators: name: Cenarro, A. J.
name: Sanchez-Blazquez, P.
name: Cardiel, N.
name: Gorgas, J.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present measurements of the CaII triplet and the Ca4227 Lick-index for a sample of early-type galaxies in the Coma cluster, deriving, for the first time, their corresponding relationships with velocity dispersion. Compared with a similar subsample of ellipticals in the field, Coma galaxies with velocity dispersions in the range ~ 180-270 km/s exhibit significant differences in the strengths of the Ca features, suggesting an influence of the environment on the star formation histories of these galaxies. We argue that the main scenarios previously proposed to explain the relatively low CaII triplet of galaxies are not able by themselves to simultaneously reconcile the strengths of the two Ca indices in both environments.
description: 6 pages including 2 figures. Accepted for publication in ApJL. For associated data tables see http://www.ucm.es/info/Astrof/ellipt/CATRIPLET.html
Topological susceptibility with three flavors of staggered quarks
Creators: name: Aubin, C.
name: Bernard, C.
name: Billeter, Brian
name: DeTar, C.
name: Gottlieb, Steven
name: Gregory, E.
name: Heller, U. M.
name: Hetrick, J. E.
name: Osborn, J.
name: Sugar, R. L.
name: Toussaint, D.
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: As one test of the validity of the staggered-fermion fourth-root determinant trick, we examine the suppression of the topological susceptibility of the QCD vacuum in the limit of small quark mass. The suppression is sensitive to the number of light sea quark flavors. Our study is done in the presence of 2+1 flavors of dynamical quarks in the improved staggered fermion formulation. Variance-reduction techniques provide better control of statistical errors. New results from staggered chiral perturbation theory account for taste-breaking effects in the low-quark mass behavior of the susceptibility, thereby reducing scaling violations from this source. Measurements over a range of quark masses at two lattice spacings permit a rough continuum extrapolation to remove the remaining lattice artifacts. The results are consistent with chiral perturbation theory with the correct flavor counting.
description: Lattice2004(topology)
title: Becoming a different person in the zone of proximal development : a case study of sixth form students making career and HE choices
Creators: name: Bassot, Barbara
Publisher: name: The Open University
Year: 2005

description: During the last decade there has been a significant expansion in higher education (HE) in the UK, and widening participation is high on the government's agenda, as it is seen as one means of achieving a better-qualified workforce. In their work with clients, Careers Advisers are required to promote equality of opportunity, which becomes problematic when studies show the HE system in the UK to be segregated along racial lines (Ball et al, 2002; Reay et al, 2001), with students from ethnic minorities much more likely to study in new universities in metropolitan areas, than in older, more established institutions. This study seeks to explore the ways in which Careers Advisers can promote equality of opportunity effectively, and critically evaluates the possible application of collectivist interpretations of the zone of proximal development, situated approaches and activity theory, to career guidance practice. The methodology chosen is that of social constructivism, and the study focuses on a small number of students (most of whom are from ethnic minorities) from a sixth form college in inner London who are making their HE choices. The method of enquiry adopted is one of a qualitative case study (Bassey, 1999), through which the stories of the students are interpreted. This study shows that whilst agency on the part of the individual may by itself not be enough to widen participation into HE, the opportunity for sixth formers to participate in the community of practice of HE, together with a level of openness to their participation on the part of HE systems could do much to bring about transformatory change in the HE system from within via expansive learning (Engeström, 2001). The work highlights a role for Careers Advisers in promoting individual agency, and in fostering a culture of participation in career guidance.
Pronounced enhancement of the lower critical field and critical current deep in the superconducting state of PrOs$_4$Sb$_{12}$
Creators: name: Cichorek, T.
name: Mota, A. C.
name: Steglich, F.
name: Frederick, N. A.
name: Yuhasz, W. M.
name: Maple, M. B.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We have observed an unexpected enhancement of the lower critical field $H_{c1}(T)$ and the critical current $I_{c}(T)$ deep in the superconducting state below $T \approx 0.6$ K ($T/T_{c} \approx 0.3$) in the filled skutterudite heavy fermion superconductor PrOs$_4$Sb$_{12}$. From a comparison of the behavior of $H_{c1}(T)$ with that of the heavy fermion superconductors U$_{1-x}$Th$_x$Be$_{13}$ and UPt$_3$, we speculate that the enhancement of $H_{c1}(T)$ and $I_{c}(T)$ in PrOs$_4$Sb$_{12}$ reflects a transition into another superconducting phase that occurs below $T/T_{c} \approx 0.3$. An examination of the literature reveals unexplained anomalies in other physical properties of PrOs$_4$Sb$_{12}$ near $T/T_{c} \approx 0.3$ that correlate with the features we have observed in $H_{c1}(T)$ and $I_{c}(T)$.
description: 4 pages, 3 figures, submitted to Physical Review Letters. v2: small corrections to references, updated figure 3
Phases of massive gravity
Creators: name: Dubovsky, S. L.
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Astrophysics (astro-ph)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We systematically study the most general Lorentz-violating graviton mass invariant under three-dimensional Eucledian group using the explicitly covariant language. We find that at general values of mass parameters the massive graviton has six propagating degrees of freedom, and some of them are ghosts or lead to rapid classical instabilities. However, there is a number of different regions in the mass parameter space where massive gravity can be described by a consistent low-energy effective theory with cutoff $\sim\sqrt{mM_{Pl}}$ free of rapid instabilities and vDVZ discontinuity. Each of these regions is characterized by certain fine-tuning relations between mass parameters, generalizing the Fierz--Pauli condition. In some cases the required fine-tunings are consequences of the existence of the subgroups of the diffeomorphism group that are left unbroken by the graviton mass. We found two new cases, when the resulting theories have a property of UV insensitivity, i.e. remain well behaved after inclusion of arbitrary higher dimension operators without assuming any fine-tunings among the coefficients of these operators, besides those enforced by the symmetries. These theories can be thought of as generalizations of the ghost condensate model with a smaller residual symmetry group. We briefly discuss what kind of cosmology can one expect in massive gravity and argue that the allowed values of the graviton mass may be quite large, affecting growth of primordial perturbations, structure formation and, perhaps, enhancing the backreaction of inhomogeneities on the expansion rate of the Universe.
description: 36 pages, 1 figure
High-quality electrical transport using scalable CVD graphene
Creators: name: Pezzini, Sergio
name: Mišeikis, Vaidotas
name: Pace, Simona
name: Rossella, Francesco
name: Watanabe, Kenji
name: Taniguchi, Takashi
name: Coletti, Camilla
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Producing and manipulating graphene on fab-compatible scale, while maintaining its remarkable carrier mobility, is key to finalize its technological application. We show that a large-scale approach (chemical vapor deposition on Cu followed by polymer-mediated semi-dry transfer) yields single-layer graphene crystals fully comparable, in terms of electronic transport, to micro-mechanically exfoliated flakes. hBN is used to encapsulate the graphene crystals $-$ without taking part to their detachment from the growth catalyst $-$ and study their intrinsic properties in field-effect devices. At room temperature, the electron-phonon coupling sets the mobility to $\sim1.3 \times10^5$ cm$^2$V$^{-1}$s$^{-1}$ at $\sim10^{11}$ cm$^{-2}$ concentration. At cryogenic temperatures, the mobility ($ > 6\times10^5$ cm$^2$V$^{-1}$s$^{-1}$ at $\sim10^{11}$ cm$^{-2}$) is limited by the devices' physical edges, and charge fluctuations $ < 7\times10^9$ cm$^{-2}$ are detected. Under perpendicular magnetic fields, we observe early onset of Landau quantization ($B\sim50$ mT) and signatures of electronic correlation, including the fractional quantum Hall effect.
description: This is the unedited authors' version of the submitted article; 24 pages, 4 figures and supplementary information
The Delta(1232) at RHIC
Creators: name: van Hees, H.
name: Rapp, R.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We investigate properties of the Delta(1232) and nucleon spectral functions at finite temperature and baryon density within a hadronic model. The medium modifications of the Delta consist of a renormalization of its pion-nucleon cloud and resonant pi-Delta scattering. Underlying coupling constants and form factors are determined by the elastic π-N scattering phase shift in the isobar channel, as well as empirical partial decay widths of excited baryon resonances. For cold nuclear matter the model provides reasonable agreement with photoabsorption data on nuclei in the Delta-resonance region. In hot hadronic matter typical for late stages of central Au-Au collisions at RHIC we find the Delta-spectral function to be broadened by $\sim$65 MeV together with a slight upward mass shift of 5-10 MeV, in qualitative agreement with preliminary data from the STAR collaboration.
description: 7 pages, 4 figures, Talk given at the Hot Quarks 2004 Workshop, Taos,NM, July 18-24 2004, v3: typos corrected
title: Reflections on learning in a transnational context : a study of personal and professional development amongst Open University graduates living in Belgium, Greece and Spain
Creators: name: Bennison, Charlotte Hilary
Publisher: name: The Open University
Year: 2005

description: This study is an investigation into what it means to be a learner in a transnational context. The research focuses on a cohort of graduates who studied with the Open University whilst living in Belgium, Greece and Spain. The impact of nationality, language and previous educational background on the experience of borderless education is explored, as well as the outcomes in terms of personal and professional development. Set within the wider framework of the development of the European Higher Education Area, the debate over the declining power of the nation-state, the growth of crossborder education and the increased use of English as a global language, the graduates in this survey are identified as both responding and contributing to the forces of globalisation within higher education.

Using a multiple research strategy including a focus group, a questionnaire and a small sample of semi-structured in-depth interviews, this study adopts an interpretative and cross-cultural approach to represent the national, cultural and linguistic diversity of the participants, and to give a voice to the plurality of their experiences.

Although this study was carried out with graduates from the Open University, the findings are of relevance to academic, administrative and student support staff in any university that offers its courses in a transnational setting.
Analysis of developmentally programmed changes in hematopoietic stem cells
Creators: name: Bowie, Michelle Beatrice
Publisher: name: University of British Columbia
Year: 2010

description: To characterize the extent and timing of changes in hematopoietic stem cell (HSC) properties during ontogeny, experimental strategies were developed to allow quantitative assessment of their proliferative activity, self-renewal potential and differentiation behaviour in vivo. All HSCs in the fetal liver [i.e. foetal liver] were found to be cycling and following their transplantation into irradiated adult hosts, they rapidly generated daughter HSCs and produced large numbers of granulopoietic progeny. In contrast, adult HSCs, which are predominantly quiescent, regenerated new HSCs more slowly and produced fewer granulopoietic progeny. They also showed a coordinated change in expression of several transcription factors that regulate HSC functions. Interestingly, HSCs retained a fetal phenotype with respect to all these features until 3 weeks after birth and then, within one week, acquired an adult HSC phenotype. Additional studies of serially transplanted HSCs indicated that this switch also took place within the same time frame in adult mice reconstituted with fetal or 3-week post-natal HSCs, suggesting the switch is intrinsically programmed. To further investigate the mechanism of this switch, an in vitro model suitable for monitoring the survival, proliferation and self-renewal activity of highly purified fetal liver HSCs was developed. Using this model, I found that the cell cycle transit time of optimally stimulated fetal HSCs and adult HSCs is the same, but with lower Steel factor requirements for fetal HSCs. This suggested that the fetal-to-adult switch involves a decreased response to c-Kit activation. Interestingly, the self-renewal behaviour of fetal HSCs expressing a defective form of c-Kit mimicked adult +/+ HSCs, both in vitro and in vivo, but showed no difference in cycling activity, suggesting that Steel factor responsiveness specifically regulates HSC self-renewal responsiveness in vivo. Future studies of changes in gene expression during the switch, including analyses of c-Kit-defective HSCs as well as normal HSCs, may help to link the observed changes in Steel factor responsiveness to the molecular mechanisms that control changes in HSC self-renewal and cycling control during ontogeny.
Size-Dependent Bruggeman Approach for Dielectric-Magnetic Composite Materials
Creators: name: Lakhtakia, A.
name: Mackay, T. G.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Classical Physics (physics.class-ph)
subject: FOS: Physical sciences

description: Expressions arising from the Bruggeman approach for the homogenization of dielectric-magnetic composite materials, without ignoring the sizes of the spherical particles, are presented. These expressions exhibit the proper limit behavior. The incorporation of size dependence is directly responsible for the emergence of dielectric-magnetic coupling in the estimated relative permittivity and permeability of the homogenized composite material.
description: 4 pages, accepted for publication in AEUe
Poynting-Robertson effect as a dissipative system in general relativity
Creators: name: De Falco, Vittorio
name: Battista, Emmanuele
Publisher: name: arXiv
Year: 2020
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We determine for the first time in the literature the analytic form of the Rayleigh potential of the general relativistic Poynting-Robertson effect. The employed procedure is based on the use of an integrating factor and a new integration strategy where the test particle's dissipated energy represents the fundamental variable. The obtained results and their implications are discussed. Finally, concluding remarks and future projects are drawn.
description: 13 pages, 3 figures; Accepted on Physical Review D. Much of this work appeared previously as arXiv:1911.03197, which remains un-published
Investigating Data and Software Sharing Practices Across AGU
Creators: name: Vrouwenvelder, Kristina
Publisher: name: Zenodo
Year: 2024
Subjects: data sharing
open science
software sharing
earth and space science

description: Poster on data and software sharing by authors in American Geophysical Union journals. Presented on 1/24/2024 at the Earth Science Information Partners January 2024 Research Showcase.
The Latest Work from the SEI
Creators: name: Schmidt, Douglas
Publisher: name: Carnegie Mellon University
Year: 2024
Subjects: Software Engineering

description: As part of an ongoing effort to keep you informed about our latest work, this blog post summarizes some recent publications from the SEI in the areas of supply chain risk management, technical debt, large language models, quantum computing, acquisition, and trustworthiness in AI systems.  These publications highlight the latest work of SEI technologists in these areas. This post includes a listing of each publication, author(s), and links where they can be accessed on the SEI website.
Characteristic classes of foliated surface bundles with area-preserving holonomy
Creators: name: Kotschick, D.
name: Morita, S.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Symplectic Geometry (math.SG)
subject: Algebraic Topology (math.AT)
subject: Geometric Topology (math.GT)
subject: FOS: Mathematics
subject: 57R17; 57R50; 57M99

description: Making use of the extended flux homomorphism on the group of symplectomorphisms of a closed oriented surface of genus at least 2, we introduce new characteristic classes of foliated surface bundles with symplectic, equivalently area-preserving, total holonomy. These characteristic classes are stable with respect to the genus and we show that they are highly non-trivial. We also prove that the second homology of the group of Hamiltonian symplectomorphisms equipped with the discrete topology is very large.
description: minor improvements to the exposition; to appear in Journal of Differential Geometry
Almost Periodic Solutions and Global Attractors of Non-autonomous Navier-Stokes Equations
Creators: name: Cheban, David
name: Duan, Jinqiao
Publisher: name: arXiv
Year: 2004
Subjects: subject: Dynamical Systems (math.DS)
subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics
subject: primary:34C35, 34D20, 34D40, 34D45, 58F10, 58F12

description: The article is devoted to the study of non-autonomous Navier-Stokes equations. First, the authors have proved that such systems admit compact global attractors. This problem is formulated and solved in the terms of general non-autonomous dynamical systems. Second, they have obtained conditions of convergence of non-autonomous Navier-Stokes equations. Third, a criterion for the existence of almost periodic (quasi periodic,almost automorphic, recurrent, pseudo recurrent) solutions of non-autonomous Navier-Stokes equations is given. Finally, the authors have derived a global averaging principle for non-autonomous Navier-Stokes equations.
description: J. Dynamics and Diff. Eqns., in press, 2004
Diffusive Shock Acceleration of High Energy Cosmic Rays
Creators: name: Baring, Matthew G.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The process of diffusive acceleration of charged particles in shocked plasmas is widely invoked in astrophysics to account for the ubiquitous presence of signatures of non-thermal relativistic electrons and ions in the universe. A key characteristic of this statistical energization mechanism is the absence of a momentum scale; astrophysical systems generally only impose scales at the injection (low energy) and loss (high energy) ends of the particle spectrum. The existence of structure in the cosmic ray spectrum (the "knee") at around 3000 TeV has promoted contentions that there are at least two origins for cosmic rays, a galactic one supplying those up to the knee, and even beyond, and perhaps an extragalactic one that can explain even the ultra-high energy cosmic rays (UHECRs) seen at 1-300 EeV. Accounting for the UHECRs with familiar astrophysical sites of acceleration has historically proven difficult due to the need to assume high magnetic fields in order to reduce the shortest diffusive acceleration timescale, the ion gyroperiod, to meaningful values. Yet active galaxies and gamma-ray bursts remain strong and interesting candidate sources for UHECRs, turning the theoretical focus to relativistic shocks. This review summarizes properties of diffusive shock acceleration that are salient to the issue of UHECR generation. These include spectral indices, acceleration efficencies and timescales, as functions of the shock speed and mean field orientation, and also the nature of the field turbulence. The interpretation of these characteristics in the context of gamma-ray burst models for the production of UHECRs is also examined.
description: 10 pages, 2 embedded figures, To appear in Nuclear Physics B, Proceedings Supplements, as part of the volume for the CRIS 2004, Cosmic Ray International Seminar: "GZK and Surroundings."
title: Τεχνικές ολοκλήρωσης σημασιολογικών γεωχωρικών δεδομένων
titleType: AlternativeTitle
Creators: name: Maroulis, Thomas D.
Publisher: name: National Technological University of Athens
Year: 2015
Subjects: RDF
GeoSPARQL
Γεωχωρικά δεδομένα
Μετασχηματισμοί δεδομένων
Διασύνδεση
Geospatial data
Data transformations
Interlinking

description: 95 σ.
description: Στόχος της διπλωματικής ήταν πρώτον ο μετασχηματισμός δεδομένων γεωχωρικού χαρακτήρα σε RDF και δεύτερον η ανάπτυξη τεχνικών διασύνδεσης σημασιολογικών γεωχωρικών δεδομένων. Στο πλαίσιο του πρώτου στόχου αναπτύξαμε το Geosm, ένα εργαλείο για το μετασχηματισμό δεδομένων χαρτογράφησης από το OpenStreetMap σε RDF γράφους σε συμφωνία με το OGC GeoSPARQL πρότυπο. Για την ανάπτυξη του εργαλείου βασιστήκαμε στο υπάρχον εργαλείο Osmosis και στη βιβλιοθήκη Apache Jena, ενώ για τη διατήρηση της συμβατότητας με το LinkedGeoData project κάναμε χρήση των ίδιων RDF λεξιλογίων. Στο πλαίσιο του δεύτερου στόχου αναλύσαμε το θέμα της διασύνδεσης γεωχωρικών σημασιολογικών δεδομένων, εξετάζοντας τις δυνατότητες υπαρχόντων μετρικών ομοιότητας συμβολοσειρών, σχεδιάζοντας νέες μετρικές ομοιότητας γεωμετριών προσαρμοσμένες στις απαιτήσεις των δεδομένων μας και τέλος εκτελώντας ένα ευρύ φάσμα πειραμάτων σε δεδομένα που συλλέξαμε για την ανάλυση της επίδοσης των μετρικών και την εξαγωγή συμπερασμάτων.
description: The objective of this thesis was firstly the transformation of geospatial data to RDF and secondly the development of techniques for the interlinking of semantic geospatial data. In the context of the first goal we developed Geosm, a tool for the transformation of mapping data from OpenStreetMap to RDF graphs in compliance with the OGC GeoSPARQL standard. For the development of the tool we made use of the existing tool Osmosis and of the library Apache Jena, while to ensure compatibility with LinkedGeoData project we made use of the same RDF vocabularies. In the context of the second goal we explored the issue of interlining semantic geospatial data by examining the capabilities of existing string similarity metrics, by designing new metrics for the similarity of geometries in concert to the requirements imposed by our data and lastly by executing a wide range of experiments on data we collected for this purpose in order to analyse the quality of the metrics and draw conclusions concerning their optimal use.
Spin order in the one-dimensional Kondo and Hund lattices
Creators: name: Garcia, D. J.
name: Hallberg, K.
name: Alascio, B.
name: Avignon, M.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We study numerically the one-dimensional Kondo and Hund lattices consisting of localized spins interacting antiferro or ferromagnetically with the itinerant electrons, respectively. Using the Density Matrix Renormalization Group we find, for both models and in the small coupling regime, the existence of new magnetic phases where the local spins order forming ferromagnetic islands coupled antiferromagnetically. Furthermore, by increasing the interaction parameter $|J|$ we find that this order evolves toward the ferromagnetic regime through a spiral-like phase with longer characteristic wave lengths. These results shed new light on the zero temperature magnetic phase diagram for these models.
description: PRL, to appear
Bayesian optimal control of GHZ states in Rydberg lattices
Creators: name: Mukherjee, Rick
name: Xie, Harry
name: Mintert, Florian
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: Atomic Physics (physics.atom-ph)
subject: Machine Learning (stat.ML)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: The ability to prepare non-classical states in a robust manner is essential for quantum sensors beyond the standard quantum limit. We demonstrate that Bayesian optimal control is capable of finding control pulses that drive trapped Rydberg atoms into highly entangled GHZ states. The control sequences have a physically intuitive functionality based on the quasi-integrability of the Ising dynamics. They can be constructed in laboratory experiments resulting in preparation times that scale very favourably with the system size.
description: 4+2 pages, 5+2 figures
Weak Lensing Analysis of the z~0.8 cluster CL 0152-1357 with the Advanced Camera for Surveys
Creators: name: Jee, M. J.
name: White, R. L.
name: Benitez, N.
name: Ford, H. C.
name: Blakeslee, J. P.
name: Rosati, P.
name: Demarco, R.
name: Illingworth, G. D.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present a weak lensing analysis of the X-ray luminous cluster CL 0152-1357 at z~0.84 using HST/ACS observations. The unparalleled resolution and sensitivity of ACS enable us to measure weakly distorted, faint background galaxies to the extent that the number density reaches ~175 arcmin^-2. The PSF of ACS has a complicated shape that also varies across the field. We construct a PSF model for ACS from an extensive investigation of 47 Tuc stars in a modestly crowded region. We show that this model PSF excellently describes the PSF variation pattern in the cluster observation when a slight adjustment of ellipticity is applied. The high number density of source galaxies and the accurate removal of the PSF effect through moment-based deconvolution allow us to restore the dark matter distribution of the cluster in great detail. The direct comparison of the mass map with the X-ray morphology from Chandra observations shows that the two peaks of intracluster medium traced by X-ray emission are lagging behind the corresponding dark matter clumps, indicative of an on-going merger. The overall mass profile of the cluster can be well described by an NFW profile with a scale radius of r_s =309+-45 kpc and a concentration parameter of c=3.7+-0.5. The mass estimates from the lensing analysis are consistent with those from X-ray and Sunyaev-Zeldovich analyses. The predicted velocity dispersion is also in good agreement with the spectroscopic measurement from VLT observations. In the adopted WMAP cosmology, the total projected mass and the mass-to-light ratio within 1 Mpc are estimated to be 4.92+-0.44 10^14 solar mass and 95+-8 solar mass/solar luminosity, respectively.
description: Accepted for publication in Astrophysical Journal. 58 pages, 26 figures. Figures have been degraded to meet size limit; a higher resolution version available at http://acs.pha.jhu.edu/~mkjee/ms_cl0152.pdf
Exponential Stability Of The Quasigeostrophic Equation Under Random Perturbations
Creators: name: Duan, Jinqiao
name: Kloeden, Peter E.
name: Schmalfuss, Bjorn
Publisher: name: arXiv
Year: 2004
Subjects: subject: Analysis of PDEs (math.AP)
subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics
subject: Primary 60H25, 47H10; Secondary 34D35

description: he quasigeostrophic model describes large scale and relatively slow fluid motion in geophysical flows. We investigate the quasigeostrophic model under random forcing and random boundary conditions. We first transform the model into a partial differential equation with random coefficients. Then we show that, under suitable conditions on the random forcing, random boundary conditions, viscosity, Ekman constant and Coriolis parameter, all quasigeostrophic motion approach a unique stationary state exponentially fast. This stationary state corresponds to a unique invariant Dirac measure
Black Holes from Colliding Wavepackets
Creators: name: Giddings, Steven B.
name: Rychkov, Vyacheslav S.
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Arguments for black hole formation in collisions of high-energy particles have rested on the emergence of a closed trapped surface in the classical geometry of two colliding Aichelburg-Sexl solutions. Recent analysis has, however, shown that curvatures and quantum fluctuations are large on this apparent horizon, potentially invalidating a semiclassical analysis. We show that this problem is an artifact of the unphysical classical point-particle limit: for a particle described by a quantum wavepacket, or for a continuous matter distribution, trapped surfaces indeed form in a controlled regime.
description: 6 pages