Search results for "INTEGRATION"

Computation of form factors in massless QCD with finite master integrals

2016

We present the bare one-, two-, and three-loop form factors in massless Quantum Chromodynamics as linear combinations of finite master integrals. Using symbolic integration, we compute their $\epsilon$ expansions and thereby reproduce all known results with an independent method. Remarkably, in our finite basis, only integrals with a less-than-maximal number of propagators contribute to the cusp anomalous dimensions. We report on indications of this phenomenon at four loops, including the result for a finite, irreducible, twelve-propagator form factor integral. Together with this article, we provide our automated software setup for the computation of finite master integrals.

A quasi-finite basis for multi-loop Feynman integrals

2014

We present a new method for the decomposition of multi-loop Euclidean Feynman integrals into quasi-finite Feynman integrals. These are defined in shifted dimensions with higher powers of the propagators, make explicit both infrared and ultraviolet divergences, and allow for an immediate and trivial expansion in the parameter of dimensional regularization. Our approach avoids the introduction of spurious structures and thereby leaves integrals particularly accessible to direct analytical integration techniques. Alternatively, the resulting convergent Feynman parameter integrals may be evaluated numerically. Our approach is guided by previous work by the second author but overcomes practical …

Multi-boson block factorization of fermions

2017

The numerical computations of many quantities of theoretical and phenomenological interest are plagued by statistical errors which increase exponentially with the distance of the sources in the relevant correlators. Notable examples are baryon masses and matrix elements, the hadronic vacuum polarization and the light-by-light scattering contributions to the muon g-2, and the form factors of semileptonic B decays. Reliable and precise determinations of these quantities are very difficult if not impractical with state-of-the-art standard Monte Carlo integration schemes. I will review a recent proposal for factorizing the fermion determinant in lattice QCD that leads to a local action in the g…

Deep and Meaningful E-Learning with Social Virtual Reality Environments in Higher Education: A Systematic Literature Review

2021

Deep and meaningful learning (DML) in distant education should be an essential outcome of quality education. In this literature review, we focus on e-learning effectiveness along with the factors and conditions leading to DML when using social virtual reality environments (SVREs) in distance mode higher education (HE). Hence, a systematic literature review was conducted summarizing the findings from thirty-three empirical studies in HE between 2004 (appearance of VR) and 2019 (before coronavirus appearance). We searched for the cognitive, social, and affective aspects of DML in a research framework and studied their weight in SVREs. The findings suggest that the use of SVREs can provide aut…

ICT – the new frontier? Pushing the boundaries of careers practice

2014

Much progress has been made in integrating information and communications technology ICT into careers practice, but there is still room for improvement. An international lens is adopted to examine some key elements that contribute to the successful integration of information communications technology (ICT) into careers practice. We start by exploring the role of policy, using the UK as a case study. Next, the perceptions that Finnish career practitioners have of ICT are reviewed using research findings into the different ways they think about social media and its purpose in career services. Finally, lessons learned from the design and integration of online services within career development…

Teacher beliefs regarding learning, pedagogy, and the use of technology in higher education

2017

This study examines university teachers’ beliefs about the role of technology in achieving the pedagogical aims of learning within teaching development initiatives at a Finnish university. The initiatives targeted technology adoption in teaching and learning and were enhanced within teacher groups, with support from a university level network program. Thematic interviews were conducted with the members of 11 initiative groups, covering 18 teachers from various disciplines. The qualitative content analysis revealed diverse belief groups. Technology was perceived as a tool for: the promotion of self-paced studying without explicit learning aims; active and interactive learning; integrative le…

Verlaufsbeobachtung des Kollagen- und Knochenstoffwechsels bei Patienten mit zementfreier Hüfttotalendoprothese*

2008

Introduction This study investigated the influence of concentration and activity of several markers of the collagen and bone metabolism and their impact on ingrowth of non-cemented total hip arthroplasty. Methods 40 patients underwent an implantation of a ABG-prosthesis. Before surgery and 1, 2, 12 and 24 weeks after it serum concentrations of PICP, ICTP, IGF-1, ON, b-AP, Calcium, Phosphate, GPT and Creatinin were measured and a collagen ratio (CQ) was calculated. Results PICP decreased until 1st week, increased at 2nd week and decreased again after that time. ICTP increased significantly in 1st week, reached a maximum in 2nd week and decreased after that. b-AP decreased in 1st week but inc…

The EU-Eastern Partnership Countries: Association Agreements and Transdisciplinarity in Studies, Training and Research

2014

Abstract The European Union (EU) signed Association Agreements on 27 June 2014 with Georgia, the Republic of Moldova, and Ukraine. The Association Agreement (AA) is the EU’s main instrument to bring the countries in the Eastern Partnership (EaP) closer to EU standards and norms. For the citizens of the EaP countries to benefit from these agreements, a more in-depth knowledge of the EU and the EU Member States is required to be reflected in a comparative approach to European Union studies. We examine these implications on the need to expand and adapt, the content and approach to research and teaching European Union studies, with the transdisciplinary approach becoming increasingly dominant, …

Embracing values? The question of Finnish membership of the Council of Europe as a case of political value deliberation in European integration, 1987…

2016

Debating federal Europe in the British Parliament, c. 1940–49

2017

AbstractFederalism, or the fear of it, worked as a catalyst in the British pre-referendum debate on Brexit in June 2016. In this paper, we focus on the pre-European integration context and ask what kind of an alternative federalism was seen to afford in British politics during and after the Second World War. We limit our discussion to parliamentary debates, which have only rarely been used as primary sources for studying European integration history. The British Parliament was one of the key political arenas for debates on foreign policy, not just in terms of informing the party lines but also guiding the public discussion. In the early part of the 1940s, the British federalist movement was…