27 research outputs found
Non-leptonic B-decays in and beyond QCD factorisation
No full textThis thesis examines the non-leptonic B-decays within QCD factorization and beyond, to challenge the assumptions and limitations of the method. We analyse the treatment of the distribution amplitudes of light mesons and present a new model described by simple physical parameters. The leading twist distribution amplitudes of light mesons describe the leading non-perturbative hadronic contributions to exclusive QCD reactions at large energy transfer, for instance electromagnetic form factors. Importantly, they also enter into the two-body B decay amplitudes described by QCD factorisation. They cannot be calculated from first principles and are described by models based on a fixed-order conformal expansion, which is not always sufficient in phenomenological applications. We derive new models that are valid to all orders in the conformal expansion and characterised by a small number of parameters related to experimental observables. Motivated by the marginal agreement between the QCD factorisation results with the experimental data, in particular for B → ππ, we scrutinise the incalculable non-factorisable corrections to charmless non-leptonic decays. We use the available results on B → ππ, to extract information about the size and nature of the required non-factorisable corrections that are needed to reconcile the predictions and data. We find that the best-fit scenarios do not give reasonable agreement to 2a until at least a 40% non-factorisable contribution is added. Finally we consider the exclusive B → V γ decays, where we analyse the recently updated experimental data within QCD factorization and present constraints on generic super symmetric models using the mass insertion approximation
Discovering Emerging Trends and Challenges in Event Management in the Time of Pandemic
No full text<p><strong><span>Abstract:</span></strong><span> This study is focused on the challenges faced by event organizers as they adapt to new trends in hospitality management during the COVID-19 pandemic. It discusses the transformative impact of virtual event platforms and marking a significant shift in how event is organized and experienced. A 4-point likert scale is used in the research questionnaire to be answered by the study target respondents which is event management professionals managing events during the pandemic. With a total of 100 respondents the results show the respondents’ demographic profile in the terms of their age, gender, and length of service. The study also identified that the respondents influence of emerging trends and the intensity of challenges confronted in planning promotion, and preparation.</span></p>
<p><strong><span>Keywords:</span></strong><span> event organizers, hospitality management, COVID-19 pandemic, virtual event platforms.</span></p>
<p><strong><span>Title:</span></strong><span> Discovering Emerging Trends and Challenges in Event Management in the Time of Pandemic </span></p>
<p><strong><span>Author:</span></strong><span> Angelique N. Tasis, Larrylyn E. Berganio, Kervin Fritz P. Villaverde</span></p>
<p><strong><span>International Journal of Social Science and Humanities Research<span> </span></span></strong></p>
<p><strong><span>ISSN 2348-3156 (Print), ISSN 2348-3164 (online)</span></strong></p>
<p><strong><span>Vol. 12, Issue 2, April 2024 - June 2024</span></strong></p>
<p><strong><span>Page No: 202-215</span></strong></p>
<p><strong><span>Research Publish Journals</span></strong></p>
<p><strong><span>Website: www.researchpublish.com</span></strong></p>
<p><strong><span>Published Date: 01-</span></strong><strong><span>June</span><span>-2024</span></strong></p>
<p><strong><span>DOI: <a href="https://doi.org/10.5281/zenodo.11408711">https://doi.org/10.5281/zenodo.11408711</a></span></strong></p>
<p><strong><span>Paper Download Link (Source)</span></strong></p>
<p><strong><span><a href="https://www.researchpublish.com/papers/discovering-emerging-trends-and-challenges-in-event-management-in-the-time-of-pandemic-">https://www.researchpublish.com/papers/discovering-emerging-trends-and-challenges-in-event-management-in-the-time-of-pandemic-</a></span></strong></p>
IR SPECTROSCOPY STUDY ON THE (HCl)(HO) AGGREGATION IN HELIUM NANODROPLETS
No full textAuthor Institution: Department of Physical Chemistry II, Ruhr-Universitat Bochum, GermanyThe study of acid-water clusters is an active area of research due to its fundamental importance for chemistry, Int. Rev. Phys. Chem. 21, 277 (2002).}. In particular the (HCl)(HO) clusters have been extensively investigated both theoretically and experimentally as a benchmark system. Despite of the great effort devoted to its understanding HCl dissociation in water clusters is still not well understood. An IR-Spectroscopy study on (HCl)(HO) embedded in helium nanodroplets will be presented. The HOHO and isotopic substitution was used in the experiments to probe the bands in the 2650-2760 cm spectral range which has been object of some debate recently, Science 324, 1545 (2009).}, Phys. Chem. Lett. 1, 2233 (2010).}. The observed isotopic shifts for the different bands raise some new questions to be addressed
\'n Pragmatiese analise van die vertelsituasie in Verliesfontein
No full textThe writer, Karel Schoeman, is especially well known for his historiographical representations of the past, both in fiction and non-fiction, characteristically with the intention of presenting the past in an ideological perspective. Commentators have singled out his manner of narration in Verliesfontein (one of a trilogy) for particular scrutiny, concentrating on the authenticity or lack of authenticity of the narration. The trilogy clearly tries to recapture the past and present it with objective verisimilitude. In doing so, the three works give voice, almost exclusively, to persons previously marginalized, intending to redress a historical silence.Critics on the whole clearly interpret Verliesfontein politically and see the clear intention of the author to involve the reader politically as a prominent motivation of this type of literature. For this reason, one appropriate context for evaluating such works is that of language pragmatics: does the work fulfil the intention to involve through effective communication? Bluntly does the work convincingly get its message across\'? In view of the selection of speakers and the nature of the diologue, consideration of Verliesfontein in this context seems wholly appropriate. Verliesfontein has much of the typical quality that multiple first-person novels have of producing in the reader a notable sense of intimacy with the many I\' characters. The bulk of the text is filled with these promoted minor\' voices telling largely of the same events, but each from their personal perspective. However, because the first-person narrators share locutionary traits and ideology, they are not really distinguishable as individual characters in their own right: in effect, the characters are less distinguished by any individual qualities than they are by the purpose Schoeman has for each of them.The preceding comments provide the context from which the article is written. The authors\' intention was to determine how Schoeman utilizes speech strategies and the extent to which these speech strategies strengthen or undermine the ostensible over-arching voice of the novel.The main purpose of the article is to examine both the macro-structure of the novel, in particular the aspects of meta-fictional commentary and ideological utterance, and the micro-structural characteristics, in particular the inter-action markers, language accumulations and repetitions and lexicographical aspects of diction.Southern African Linguistics and Applied Language Studies 2004, 22(3&4): 19120
May the Choice Be with You? The Effects and Perceptions of Choice on Writing for College Students
No full textabstract: An explanatory sequence mixed methods design was used to examine the effects of choice on the writing performance and motivation of college students (n = 242). The randomized control trial was followed by semi-structured interviews to determine the perceptions students (n = 20) held on the experiment as well the importance of choosing writing topics in college writing assignments. The effects of choice were tested as part of a real writing assignment that was included in nine sections of an introductory special education course. Results from hierarchical linear modeling (HLM) analyses found choice had a statistically significant negative effect on holistic writing quality, number of words written, and intrinsic writing motivation. Findings from the semi-structured interviews provided context for understanding the unexpected quantitative results.Dissertation/ThesisDoctoral Dissertation Learning, Literacies and Technologies 201
Transgressive femininity: gender in the Scandinavian Modern Breakthrough
No full textThis PhD thesis deals with how new discourses on femininity and gender developed in
Scandinavian literature during the Modern Breakthrough, 1880-1909. Political,
economic and demographic changes in the Scandinavian societies put pressures on the
existing, conventional gender roles, which literature reflects; however, literature also
created and introduced new discourses on gender.
The main focus has been on transgressive female characters in Danish, Swedish
and Norwegian novels, which I have seen as indicators of emerging new forms of
femininity. The study shows how the transgression of gender boundaries is used in the
novels, when presenting their views on what femininity is, should be or could be. In
addition to analysing the textual strategies in the representation of these ‘deviant’
literary characters, I have examined how the relevant texts were received by critics and
reviewers at the time, as reviews are in themselves discursive constructs.
The theoretical basis of this study has mainly been Michel Foucault’s discourse
theory, Judith Butler’s theory of performativity and Yvonne Hirdman’s theory of
gender binarism. I have also used concepts from several (mainly Anglo-American and
Scandinavian) literary gender theorists and historians in the analyses.
The four novels analysed in this study are as follows: 1) Danish author Herman
Bang’s early decadence novel Haabløse Slægter (1880), where I use a queer theory
perspective. 2) Norwegian author Ragnhild Jølsen’s Rikka Gan (1904), where the
strong elements of pre-psychoanalysis are analysed. 3) Swedish author August
Strindberg’s Le Plaidoyer d’un fou (1887-88), where I make a narratological
examination of the narrative voice from a gender perspective. 4) Swedish author Annie
Quiding’s Fru Fanny (1904), analysed as an example of ‘negative’ New Woman
literature.
The thesis shows how literature of the time represented and introduced new forms
of femininity, often in the form of ambiguous female characters, and often to the
disapproval of the critics. It also shows that gender discourses were much alike within
Scandinavia. Furthermore, my study lays bare the skeleton of normative Breakthrough femininity, what can be called the dominant discourse on femininity at the time: a nonexisting
sexual desire, feminine immobility/containment in the home and an imperative,
self-sacrificing motherliness
What (actually) matters in literacy education: Contributions from community psychology
No full textThis paper describes the critical role community psychology theories played in reframing literacy research involving mainly Māori and Pacific peoples’ extended families and communities. Within a critical social constructionist paradigm, ecological systems theory and holistic, integrative theories of wellbeing brought much-needed new thinking to how family-focused adult literacy education might be theorised and practiced. This reframing marks a challenge to and movement away from still-dominant Western individualistic, behavioural orientated, skills-based and formal economy-focused ways of thinking about people’s literacy abilities. It highlights the important role of community psychology in developing theory, informing policy and enhancing practices in culturally diverse education settings to achieve both educational and quality of life aims. Improving quality of life is not possible through literacy education in and of itself, but rather through the inculcation in programme design and delivery of those things which are fundamental and critical to the participants’ overall wellbeing and welfare
Pandemics, Protests, and Pronouns:The Changing Landscape of Biomedical Visualisation and Education
No full textEvents in early 2020 changed the landscape of education for the foreseeable future, perhaps permanently. Three events had a significant impact; (1) the Coronavirus disease 2019 (COVID-19) pandemic, (2) the death of George Floyd, which resulted in the most recent Black Lives Matter (BLM) protests, and (3) the Twitter storm, the resultant societal fallout and freedom of speech campaigns, following comments made by author JK Rowling which many deemed transphobic. These events had a differential impact on biomedical sciences, when compared to other sectors. COVID-19 resulted in a global lockdown, with higher education institutions closing campuses and moving to online-only delivery. This rapid change required radical shifts in the use of technology, with mass delivery of teaching at short notice. The BLM protests further raised awareness of the inequalities within society, particularly those experienced by Black people and other oppressed groups. As a result, there have been calls for the decolonisation of the curriculum. The implications of these three key events have led institutions to rethink their policies, teaching delivery, assessment, curricula, and physical environments. This chapter considers (1) the implications of a swift change in the primary mode of curriculum delivery within Higher Education to online formats and (2) how recent adverse events have resulted in calls for much-needed changes in visual representations within biomedical sciences. Finally, we consider (3) the role of the hidden curriculum and the potential impact of visual representations in curricula on the delivery of healthcare and the fight against health inequalities, which are often as a result of implicit biases. The year 2020 has proven timely in presenting the opportunity for change, provided through the power of imagery.</p
Diagnostic performance of the ACR/EULAR 2010 criteria for rheumatoid arthritis and two diagnostic algorithms in an early arthritis clinic (REACH)
No full textIntroduction: An ACR/EULAR task force released new criteria to classify rheumatoid arthritis at an early stage. This study evaluates the diagnostic performance of these criteria and algorithms by van der Helm and Visser in REACH. Methods: Patients with symptoms ≤12 months from REACH were used. Algorithms were tested on discrimination, calibration and diagnostic accuracy of proposed cut-points. Two patient sets were defi ned to test robustness; undifferentiated arthritis (UA) (n=231) and all patients including those without synovitis (n=513). The outcomes evaluated were methotrexate use and persistent disease at 12 months. Results: In UA patients all algorithms had good areas under the curve 0.79, 95% CI 0.73 to 0.83 for the ACR/EULAR criteria, 0.80, 95% CI 0.74 to 0.87 for van der Helm and 0.83, 95% CI 0.77 to 0.88 for Visser. All calibrated well. Sensitivity and specifi city were 0.74 and 0.66 for the ACR/EULAR criteria, 0.1 and 1.0 for van der Helm and 0.59 and 0.93 for Visser. Similar results were found in all patients indicating robustness. Conclusion: The ACR/EULAR 2010 criteria showed good diagnostic properties in an early arthritis cohort refl ecting daily practice, as did the van der Helm and Visser algorithms. All were robust. To promote uniformity and comparability the ACR/EULAR 2010 criteria should be used in future diagnostic studies. Copyright Article author (or their employer) 2011
