Si Yuan, Kangsheng Ye, Yongliang Wang, David Kennedy and Frederic W. Williams
The purpose of this paper is to present a numerically adaptive finite element (FE) method for accurate, efficient and reliable eigensolutions of regular second- and fourth-order…
Abstract
Purpose
The purpose of this paper is to present a numerically adaptive finite element (FE) method for accurate, efficient and reliable eigensolutions of regular second- and fourth-order Sturm–Liouville (SL) problems with variable coefficients.
Design/methodology/approach
After the conventional FE solution for an eigenpair (i.e. eigenvalue and eigenfunction) of a particular order has been obtained on a given mesh, a novel strategy is introduced, in which the FE solution of the eigenproblem is equivalently viewed as the FE solution of an associated linear problem. This strategy allows the element energy projection (EEP) technique for linear problems to calculate the super-convergent FE solutions for eigenfunctions anywhere on any element. These EEP super-convergent solutions are used to estimate the FE solution errors and to guide mesh refinements, until the accuracy matches user-preset error tolerance on both eigenvalues and eigenfunctions.
Findings
Numerical results for a number of representative and challenging SL problems are presented to demonstrate the effectiveness, efficiency, accuracy and reliability of the proposed method.
Research limitations/implications
The method is limited to regular SL problems, but it can also solve some singular SL problems in an indirect way.
Originality/value
Comprehensive utilization of the EEP technique yields a simple, efficient and reliable adaptive FE procedure that finds sufficiently fine meshes for preset error tolerances on eigenvalues and eigenfunctions to be achieved, even on problems which proved troublesome to competing methods. The method can readily be extended to vector SL problems.
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Graduate students of the University of New England (U.N.E.) during the period 1970–1984 wrote one hundred dissertations on morale in a wide variety of educational institutions…
Abstract
Graduate students of the University of New England (U.N.E.) during the period 1970–1984 wrote one hundred dissertations on morale in a wide variety of educational institutions. The Staff Morale Questionnaire (S.M.Q.) developed and progressively refined at U.N.E. was extensively used in these and other studies in Australia. The project's greatest value lay in the way it enabled external (i.e. off‐campus) students to develop their academic critical abilities in a guided research effort, and in the ripple effect which has enabled numerous administrators in Australian schools to gain some sensitisation to and understanding of the importance of organisational morale.
Darren C. Treadway, Emily D. Campion and Lisa V. Williams
In a world that glorifies power, the lives of the powerless serve as context for testimonies of salvation that in their pretentiousness more often reinforce the reputation and…
Abstract
In a world that glorifies power, the lives of the powerless serve as context for testimonies of salvation that in their pretentiousness more often reinforce the reputation and self-esteem of the powerful hero than transform the lives of the oppressed. Whereas these types of popular human-interest stories may raise awareness of the conditions surrounding the powerless, they do little more than advance the notion that these individuals are without hope and must rely solely on the generosity, resources, and leadership of the powerful populations by which they are exploited. We seek to offer a contrasting perspective in this chapter. That is, we present a framework that challenges messianic notions of leaders of ineffectual populations and presses forth with the idea that powerlessness is a more common condition than feeling powerful and that only the powerless can alter their destiny.
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David A. Askay, Anita Blanchard and Jerome Stewart
This chapter examines the affordances of social media to understand how groups are experienced through social media. Specifically, the chapter presents a theoretical model to…
Abstract
Purpose
This chapter examines the affordances of social media to understand how groups are experienced through social media. Specifically, the chapter presents a theoretical model to understand how affordances of social media promote or suppress entitativity.
Methodology
Participants (N=265) were recruited through snowball sampling to answer questions about their recent Facebook status updates. Confirmatory factor analysis (CFA) was used to examine the goodness of fit for our model.
Findings
We validate a model of entitativity as it occurs through the affordances offered by social media. Participant’s knowledge that status update responders were an interacting group outside of Facebook affected their perceptions of interactivity in the responses. Interactivity and history of interactions were the strongest predictors of status update entitativity. Further, status update entitativity had positive relationships with overall Facebook entitativity as well as group identity.
Practical implications
To encourage group identity through social media, managers need to increase employees’ perceptions of entitativity, primarily by enabling employees to see the interactions of others and to contribute content in social media platforms.
Originality/value
This is the only study we know of that empirically examines how groups are experienced through social media. Additionally, we draw from an affordance perspective, which helps to generalize our findings beyond the site of our study.
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S.A.M. Ghannadpour and H.R. Ovesy
The purpose of this paper is to develop and apply an exact finite strip (F‐a FSM) for the buckling and initial post‐buckling analyses of box section struts.
Abstract
Purpose
The purpose of this paper is to develop and apply an exact finite strip (F‐a FSM) for the buckling and initial post‐buckling analyses of box section struts.
Design/methodology/approach
The Von‐Karman's equilibrium equation is solved exactly to obtain the buckling loads and deflection modes for the struts. The investigation is then extended to an initial post‐buckling study with the assumption that the deflected form immediately after the buckling is the same as that obtained for the buckling. Through the solution of the Von‐Karman's compatibility equation, the in‐plane displacement functions are developed in terms of the unknown coefficient. These in‐plane and out‐of‐plane deflected functions are then substituted in the total strain energy expressions and the theorem of minimum total potential energy is applied to solve for the unknown coefficient.
Findings
The F‐a FSM is applied to analyze the buckling and initial post‐buckling behavior of some representative box sections for which the results were also obtained through the application of a semi‐energy finite strip method (S‐e FSM). For a given degree of accuracy in the results, however, the F‐a FSM analysis requires less computational effort.
Research limitations/implications
In the present F‐a FSM, only one of the calculated deflection modes is used for the initial post‐buckling study.
Practical implications
A very useful and computationally economical methodology is developed for the initial design of struts which encounter post‐buckling.
Originality/value
The originality of the paper is the fact that by incorporating a rigorous buckling solution into the Von‐Karman's compatibility equation, and solving it, a fairly efficient method for post‐buckling stiffness calculation is achieved.
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This paper reports on the construct validity of an instrument initially developed to measure five dimensions of morale among Australian teachers. Using factor analysis, the…
Abstract
This paper reports on the construct validity of an instrument initially developed to measure five dimensions of morale among Australian teachers. Using factor analysis, the authors confirm earlier findings that this instrument (the Staff Morale Questionnaire) taps only three dimensions—cohesive pride, leadership synergy, and personal challenge. The dimensional structure appears also to be stable across different samples of teachers.
A.Z. Keller and A. Kazazi
Examines Just‐in‐Time (JIT) from its evolution as a Japaneseconcept through to a review of its philosophy and implementation. Citesseveral techniques of implementation. Includes a…
Abstract
Examines Just‐in‐Time (JIT) from its evolution as a Japanese concept through to a review of its philosophy and implementation. Cites several techniques of implementation. Includes a review of the early work of various researchers and practitioners. Concludes that JIT is a very effective manufacturing philosophy which is universal in nature encompassing all aspects of manufacturing. Suggests a few deficiencies in current literature.
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An attempt is made to relate a morale model developed by Stogdill to the three factors identified in 1972 by Smith, Bonnett and Smith and recently confirmed by Williams and Lane…
Abstract
An attempt is made to relate a morale model developed by Stogdill to the three factors identified in 1972 by Smith, Bonnett and Smith and recently confirmed by Williams and Lane. Morale is perceived as being at least a three‐dimensional group output which, like productivity, contributes to individual inputs, expectations, interactions and performance. It is suggested that the intervening variables of leadership, purpose, task, and role perceptions may cause changes in output without any change in individual inputs at a given time. Morale surveys are pertinent to a specific place and specific time: they do not readily lend themselves to prediction.
Pingjun Jiang and Bert Rosenbloom
This research reviews numerous studies of the relationship between consumer knowledge and external search in conventional marketing channels to investigate differences among these…
Abstract
Purpose
This research reviews numerous studies of the relationship between consumer knowledge and external search in conventional marketing channels to investigate differences among these studies that have produced conflicting results. The findings provide a benchmark for future researchers and practitioners seeking to gain insight into consumer information search processes unfolding in the new environment of online, mobile, and social networking channels.
Methodology
A meta-analysis of an extensive array of empirical studies of the relationship between consumer knowledge and external information search was conducted. Regression analysis was used to test whether certain characteristics in the studies can explain variability in the effect sizes in which effect sizes are entered as dependent variables and moderators as independent variables.
Findings
Objective and subjective knowledge tend to increase search, while direct experience tends to reduce search. Consumers with higher objective knowledge search more when pursuing credence products. However, they search relatively less when pursuing search products. Consumers with higher subjective knowledge are much more likely to search in the context of experience products, but as is the case for objective knowledge having little effect on search for experience products, subjective knowledge has no significant effect on information seeking for search products. In addition, objective knowledge facilitates more information search in a complex decision-making context while higher subjective knowledge fosters more external information search in a simple decision-marketing context. Finally, the findings indicate that the knowledge search relationship reflects strong linkage in the pre-Internet era.
Originality
Relatively little is known about how the relationship between knowledge and information search varies across different types of products in simple or complex decision-making contexts. This study begins to fill this gap by providing insight into the relative importance of objective knowledge, subjective knowledge, and direct experience in influencing consumer information search activities for search, experience, and credence products in simple or complex decision-making contexts.