S. AITA, E. HAUG, F. EL KHALDI, D. LEFEBVRE and E. DI PASQUALE
A sheet metal forming simulation code has been developed, based on the explicit time integration scheme and Mindlin shell theory. It has been used for the analysis of a number of…
Abstract
A sheet metal forming simulation code has been developed, based on the explicit time integration scheme and Mindlin shell theory. It has been used for the analysis of a number of industrial parts. After recalling some modelling issues, this paper describes an industrial methodology based on the experience of those analyses. The aim of the methodology is to provide, at early design stage, information on the product formability with a workload and lead time adapted to the design delays. Concurrently 2D analyses, critical zones studies and coarse mesh global investigations can be used, with a flexible number of iterations, prior to full refined analyses of the forming process. The application of the methodology on several industrial examples is discussed.
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Karen Hammerness and Kirsti Klette
In the United States, policy discussions of teacher education in relationship to teacher quality have tended to focus more closely around debates about the nature of teacher…
Abstract
In the United States, policy discussions of teacher education in relationship to teacher quality have tended to focus more closely around debates about the nature of teacher preparation and the need for quality teachers to possess advanced degrees or certification. The field is in need of an array of indicators – a set of powerful, well-researched indicators that can be applied to large public universities as well as small regional private colleges, from university-based programs to “alternative” programs and to more “hybrid” programs. These indicators need to be relevant for teacher certification across a variety of age-ranges and developmental stages. In this chapter, we build on a growing conversation about practice in teacher education and efforts on the part of researchers to identify key features of powerful teacher education. We propose that quality teacher education is designed around a clear and shared vision of good teaching; it is coherent in that it links theory with practice and offers opportunities to learn that are aligned with the vision of good teaching; and it offers opportunities to enact teaching. While these features are supported for the most part by growing consensus in the literature (National Research Council, 2010; NCATE, 2010), there is also an emerging empirical base that provides support for the value of these features as well.
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KJELL MAGNE MATHISEN and PÅL G. BERGAN
This paper discusses algorithms for large displacement analysis of interconnected flexible and rigid multibody systems. Hydrostatic and hydrodynamic loads for systems being…
Abstract
This paper discusses algorithms for large displacement analysis of interconnected flexible and rigid multibody systems. Hydrostatic and hydrodynamic loads for systems being submerged in water are also considered. The systems may consist of cables and beams and may combine very flexible parts with rigid parts. Various ways of introducing structural joints are discussed. A special implementation of the Hilber‐Hughes‐Taylor time integration scheme for constrained non‐linear systems is outlined. The formulation is general and allows for displacements and rotational motion of unlimited size. Aspects concerning efficient solution of constrained dynamic problems are discussed. These capabilities have been implemented in a general purpose non‐linear finite element program. Applications involving static and dynamic analysis of a bi‐articulated tower and a floating tripod platform kept in place by three anchor lines are discussed.
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João Amaro de Matos, Rui Dilão and Bruno Ferreira
The purpose of this paper is to present an arbitrarily accurate approximation for the value of European options written on a Black‐Scholes stock paying a discrete dividend.
Abstract
Purpose
The purpose of this paper is to present an arbitrarily accurate approximation for the value of European options written on a Black‐Scholes stock paying a discrete dividend.
Design/methodology/approach
The proposed method is a computational method for the analytical solution of the problem.
Findings
It was found that the proposed method is computationally faster than any other exact computational available method, including Monte‐Carlo simulations.
Research limitations/implications
The method is applied for a single dividend payment, but can be extended for several payments. The exact amount of the dividend must be known ex‐ante, as well as the precise date of payment.
Practical implications
The paper provides the most efficient way to compute with absolute precision the value of European options on dividend‐paying assets, under the Black‐Scholes assumption.
Originality/value
The computing time in the approach is several orders of magnitude faster than with traditional Monte Carlo methods, for the same desired accuracy.
Shirani Ranasinghe, Thilak Jayalath, Sampath Thennakoon, Ranjith Jayasekara, Ran Shiva and Tharanga Bandara
Purpose of this study is to measure the Vitamin D status of healthy adults and to correlate with their lifestyle and feeding habits. Plasma 25-Hydroxyvitamin D (25(OH)D) is the…
Abstract
Purpose
Purpose of this study is to measure the Vitamin D status of healthy adults and to correlate with their lifestyle and feeding habits. Plasma 25-Hydroxyvitamin D (25(OH)D) is the most common marker of vitamin D status of an individual. Deficiency of vitamin D is defined as the serum level less than 20 ng/mL and insufficiency as 30 ng/mL which can be prevented.
Design/methodology/approach
Vitamin D status of healthy adults (n = 82), both male and females between the age of 18 – 50 years who were attending to the National Transport Authority, Kandy, Sri Lanka from February to March 2016, was measured and correlated with their lifestyle, feeding habits, etc.
Findings
The mean total serum D (25(OH)D in this study was 40.15 ± 3.74 nmol/l with the mean value of 42.8 ± 28.8 and 37.5 ± 16.6 for women and men, respectively. The serum calcium levels of both female and male were around 8 mg/dl and the serum total protein was 6.5 and 7 g/dl in women and men, respectively. The serum Vitamin D, calcium and total protein were not statistically significantly different between the sexes. In this study, 84 per cent of the total subjects were normocalcemic, and there was no significant relationship between vitamin D levels and their calcium levels.
Research limitations/implications
This study demonstrates that there was no statistically significant correlation between the serum vitamin D with age, serum calcium or total proteins. The majority of participants who had exposure to the sunlight more than 30 mins/day had sufficient level of vitamin D and less than 30 min/day exposure had deficiency of vitamin D. Daily intake of multivitamin influenced vitamin D status of the study group.
Practical implications
These findings will implicate the importance of cultural, feed and social habits for the nutritional status of an individual.and there are no reported studies on vitamin D status with reference to the variation of life style.
Social implications
It is very important to investigate the factors affecting to the vitamin D status of a population as such, vitamin D insufficiency or deficiency can be prevented. In Sri Lanka, the population is consisting with many ethnic groups, different ethnic groups may find some nutritional problems according to their main cultural habits.
Originality/value
The objectives of this study are to evaluate the Vitamin D status in a group of healthy adults between 20 and 50 years in both men and women and to find out the correlation of their vitamin D status with their lifestyle and feeding habits, etc.
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Torill Larsen, Aurelie Van Hoye, Hege Eikeland Tjomsland, Ingrid Holsen, Bente Wold, Jean-Philippe Heuzé, Oddrun Samdal and Philippe Sarrazin
The health promoting benefits of sport participation are under-utilized and should be further developed, particularly at the grassroots level. The purpose of this paper is to…
Abstract
Purpose
The health promoting benefits of sport participation are under-utilized and should be further developed, particularly at the grassroots level. The purpose of this paper is to examine how grassroots coaches in youth football perceive their coaching practices after participating in a community-based coach education program aimed at optimizing their experiences in youth sport, namely the Empowering Coaching™ training program, based on self-determination theory (SDT) and achievement goal theory (AGT). It compares French and Norwegian coaches to suggest whether the principles of the Empowering Coaching™ training program can be applied successfully in the two countries.
Design/methodology/approach
The Empowering Coaching™ training program is a six hour workshop and was delivered at the beginning of the 2011 football season. At the end of the season, the grassroots coaches’ reflections on their coaching practices were examined through a qualitative approach with in-depth interviews of 18 coaches in France and Norway, applying a hybrid analyses and comparing country-wise.
Findings
All coaches expressed the intention to embrace the philosophy of the program, and to apply several of the strategies they had learnt during the workshop. The coaches perceived that the program supported their efforts to develop and implement strategies to stimulate intrinsic motivation, enjoyment and long-term participation among the players. There were some differences between coaches from France and Norway (e.g. rules and involvement), but the similarities were more evident, supporting the universality of applying SDT in the youth sport setting.
Social implications
The findings are encouraging for sport as a health promoting setting and for the development of the personal skills in grassroot coaches, as they imply that coaches who feel competent in how to structure practices and matches that provide the players with positive sport experiences are likely to enable players to feel supported and motivated.
Originality/value
This study explores qualitatively the impact of an intervention based on SDT and AGT, focussing on football coaches’ reflections on their coaching practices.
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Nielen Stander and Erwin Stein
Using examples of flexible mechanisms, demonstrates that while the Newmark method is unstable for nonlinear dynamics, time step refinement could in some cases lead to even earlier…
Abstract
Using examples of flexible mechanisms, demonstrates that while the Newmark method is unstable for nonlinear dynamics, time step refinement could in some cases lead to even earlier onset of instability in the form of a blown‐up response. As a remedy, develops a plane finite beam element based on the Simo‐Vu Quoc formulation for dynamics and integrates it with an energy‐conserving midpoint time‐stepping rule for solving problems in nonlinear dynamics. Shows that this combination produces a consistently stable and accurate dynamic analysis method even for large time steps.
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Nale Lehmann-Willenbrock, Joseph A. Allen and Mark van Vugt
Teams in organizations have weekly – or even daily – meetings to exchange information, generate ideas, solve problems, and make decisions. Yet, many team meetings are described as…
Abstract
Teams in organizations have weekly – or even daily – meetings to exchange information, generate ideas, solve problems, and make decisions. Yet, many team meetings are described as ineffective by the participants, due to either their design or dysfunctional communication practices within the meeting. To gain new insights into addressing these issues, this chapter goes back deep in history and discusses the origins and functions of group meetings. Building upon evolutionary theories of human behavior, the authors examine the evolutionary significance of meetings and the ways in which they were adaptive for our human ancestors. Drawing from this evolutionary perspective, we then compare meetings in ancestral times with their modern-day counterparts. Using evidence from (a) ethnographic studies of small-scale societies that model ancestral group life and (b) organizational and team science, we contrast the typical workplace meeting with its ancient counterpart. In this review of ancient and modern meetings, we identify meeting characteristics that have been maintained through time as well as those that are unique/new in the modern time. In doing so, we inspect to what extent meeting practices in ancestral environments are aligned or at odds with meeting practices in contemporary organizations (the notion of mismatch). From these similarities and differences, we derive novel theoretical insights for the study of workplace meetings as well as suggestions for improving contemporary meeting practice. We also include a series of testable propositions that can inform future research on team meetings in organizations.
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Margaret L. Søvik, Torill Larsen, Hege Tjomsland and Oddrun Samdal
The purpose of this paper is to explore the implementation of a theoretically grounded coach education training programme for youth football coaches in Norway, through…
Abstract
Purpose
The purpose of this paper is to explore the implementation of a theoretically grounded coach education training programme for youth football coaches in Norway, through observational methods. In particular, it focuses on implementation fidelity and programme adaptation, and possible differences between the coach educators (CEs) according to their level of experience.
Design/methodology/approach
Implementation fidelity and programme adaptations for seven CEs were explored through the use of a fidelity scale and in-depth qualitative analyses. Participant responsiveness was applied to inform the observational analyses.
Findings
Results showed that most of the programme was implemented with moderate to high fidelity, and that it was adapted when delivered. Most of the adaptations seemed to be positive, aligning with the programme’s theoretical foundation and goals. A few negative and neutral adaptations also occurred. The most experienced CEs seemed to deliver the programme with highest fidelity and they also made most positive adaptations. The findings, supported by the participants’ evaluation of the programme delivery, indicate that these CEs also delivered the programme with high quality.
Research limitations/implications
In the field of implementation research there is a need for further studies applying observational methods to explore programme effectiveness in relation to implementation fidelity, adaptations made and the quality of programme delivery.
Originality/value
This study applies observational methods to evaluate the fidelity of implementation and adaptations made when implementing a coach education programme, and based on these findings quality of delivery is discussed.
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Pamela Wicker, Kirstin Hallmann and Christoph Breuer
Sport participation is not exclusively determined by individual socio‐demographic factors (micro level) since infrastructure factors such as the availability of sport facilities…
Abstract
Purpose
Sport participation is not exclusively determined by individual socio‐demographic factors (micro level) since infrastructure factors such as the availability of sport facilities and sport programmes (macro level) can also play a role in this regard. The purpose of this paper is to provide evidence for these determinants of sport participation using multi‐level analyses.
Design/methodology/approach
A survey among the resident population in the city of Munich was carried out in 2008 (n=11,715). Furthermore, secondary data on the available sport infrastructure in every urban district of Munich (n=25) were collected. Multi‐level analyses were conducted to find the micro and macro level determinants of sport participation.
Findings
The results show that aside from micro level factors, the availability of swimming pools and parks is especially important for residents’ sport activity. Moreover, sport activity in non‐profit sport clubs can be enhanced by both a good supply of sport programmes offered by sport clubs as well as a poor supply of programmes from commercial sport providers and the municipality.
Research limitations/implications
Multi‐level analyses can be recommended for future research on sport participation. The use of GIS data would be fruitful in this regard.
Practical implications
It can be recommended that municipalities invest in the construction of swimming pools and parks.
Originality/value
The paper shows that multi‐level analyses are a relatively new method of analysis for research on sport participation and that they represent the most suitable approach for analysing multi‐level data.