Search results for "Dynamic"
showing 10 items of 12329 documents
Open-source QCD analysis of nuclear parton distribution functions at NLO and NNLO
2019
We present new sets of nuclear parton distribution functions (nPDFs) at next-to-leading order (NLO) and next-to-next-to-leading order (NNLO). Our analyses are based on deeply inelastic scattering data with charged-lepton and neutrino beams on nuclear targets. In addition, a set of proton baseline PDFs is fitted within the same framework with the same theoretical assumptions. The results of this global QCD analysis are compared to existing nPDF sets and to the fitted cross sections. Also, the uncertainties resulting from the limited constraining power of the included experimental data are presented. The published work is based on an open-source tool, xFitter, which has been modified to be ap…
Next-to-leading order Balitsky-Kovchegov equation beyond large Nc
2020
We calculate finite-Nc corrections to the next-to-leading order (NLO) Balitsky-Kovchegov (BK) equation. We find analytical expressions for the necessary correlators of six Wilson lines in terms of the two-point function using the Gaussian approximation. In a suitable basis, the problem reduces from the diagonalization of a six-by-six matrix to the diagonalization of a three-by-three matrix, which can easily be done analytically. We study numerically the effects of these finite-Nc corrections on the NLO BK equation. In general, we find that the finite-Nc corrections are smaller than the expected 1/N2c∼10%. The corrections may be large for individual correlators, but have less of an influence…
Computational Fluid Dynamics (CFD) and Finite Element Analysis (FEM) of a Customized Stent-Graft for Endovascular (EVAR) Treatment of Abdominal Aorti…
2023
Background: The treatment of abdominal aortic aneurysm (AAA) is today commonly treated by inserting a stent-graft by the endovascular route, without resorting to open surgery. However, some clinical cases do not allow this less invasive approach, meaning that the stent-graft cannot be inserted and open surgery is used. Methods: In the study, we propose a fluid–structure interaction (FSI) analysis of an aneurysmatic aorta that could not be treated with Endovascular Aneurysm Repair (EVAR). The vessel is reconstructed through segmentation from CT scans and subsequently modeled on CAD software to create the surface and thickness of the vessel itself. Subsequently, we proceeded to carry out Comp…
“Dealing With Patients’ Mobility Issues: An Inter-Institutional Perspective To Analyze The Phenomenon And To Support Sustainable Policy Making In Sic…
2014
Nowadays many Italian policy makers, both at a national and regional level, are devoting a growing attention to the phenomenon of patients’ movements seeking public healthcare treatments out of the territorial jurisdiction. This paper presents the main features of a research project being carried out to analyze the mobility flows of Sicilian patients towards other Italian Regions in order to support the design of sustainable related policies. Such study adopts an inter-institutional perspective as the design of sustainable mobility-related policies requires a coordination effort of the Regional Healthcare Department, the Local Health Authorities and the Healthcare providers. The main outcom…
Reconceptualising the Role of Talk in CLIL
2011
This theoretical paper offers a reconceptualisation of talk in CLIL based on sociocultural and dialogic theories of education. Building on these educational theories and the experiences of an on-going CLIL project, this paper presents a pedagogical model for the navigation of the ‘talkscape’ of the CLIL classroom. This model comprises a total of seven talk-types: organisational, social, critical, expert, exploratory, meta and pedagogic. In addition to these talk-types, the paper introduces the notion of a ‘transitional dynamic’. This notion aims to capture the transition from first language to foreign language use in CLIL both within the context of individual courses and across a broader CL…
Constructing a pedagogical practice across disciplines in pre-service teacher education
2019
In this paper we report a qualitative case study of a teaching intervention in which a pre-service subject teacher pair planned and conducted a course integrating Finnish language and ethics in a multilingual setting. Audio-recorded planning sessions and interviews including learning diaries were analysed using qualitative content analysis to identify the dynamics of collaborative cross-curricular pedagogical practice development and pedagogical language knowledge. The analysis revealed tensions in crossing the boundary between language and content knowledge. The study suggests that when creating cross-curricular practices, student teachers benefit from longer-term processes and theory-base…
An Ecological Conceptualization of Extreme Sports
2018
Currently, there are various definitions for extreme sports and researchers in the field have been unable to advance a consensus on what exactly constitutes an ‘extreme’ sport. Traditional theory-led explanations, such as edgeworks, sensation seeking and psychoanalysis, have led to inadequate conceptions. These frameworks have failed to capture the depth and nuances of experiences of individuals who refute the notions of risk-taking, adrenaline- and thrill-seeking or death-defiance. Instead, participants are reported to describe experiences as positive, deeply meaningful and life-enhancing. The constant evolution of emerging participation styles and philosophies, expressed within and across…
Diversifying crop rotations with temporary grasslands: potentials for weed management and farmland biodiversity
2010
Fruchtfolgen können dazu dienen, die kontinuierliche Selektion von Unkrautarten zu verhindern, die an eine bestimmte Kultur angepasst sind. Dies könnte dem Unkrautmanagement, der Einsparung von Herbiziden, und der Biodiversität dienen. Heutige, sehr einfache Furchtfolgen könnten durch mehrjährige Futterkulturen diversifiziert werden. Die Einflüsse solcher mehrjähriger Kulturen auf Unkräuter wurden in vier Ansätzen untersucht : 1) Vegetationsaufnahmen auf 632 Feldern in Westfrankreich zeigten, dass die Unkrautzusammensetzung zwischen mehrjährigen Futterkulturen und einjährigen Kulturen stark variiert. Der Vergleich von Feldern vor, während und nach mehrjährigen Futterkulturen legte nahe, das…
System Dynamics Models To Support Health Care Companies In Managing Clinical Risk
2011
Clinical risk management has gained an increasing relevance because of the higher monetary and no monetary effects of clinical errors on health care companies' performance. For this reason, different risk management techniques from the industrial sector have been adopted by managers of health care companies in order to reduce the occurrences of errors and their relative impacts. However, these methods, based on a linear and static perspective, do not properly support the health care companies' management in the identification and assessment of policies aimed at improving the clinical risk profile without reducing financial performances. Therefore, it is necessary to adopt a systemic and mul…