Symplectic Analysis for Wrinkles: A Case Study of Layered Neo-Hookean Structures

2017 ◽  
Vol 84 (7) ◽  
Author(s):  
Teng Zhang
Keyword(s):  
Finite Element ◽  
Symplectic Structure ◽  
Eigenvalue Problems ◽  
Stretchable Electronics ◽  
Analysis Framework ◽  
Engineering Structures ◽  
Triple Layer ◽  
Layer Structures ◽  
Shed Light

Wrinkles are widely found in natural and engineering structures, ranging from skins to stretchable electronics. However, it is nontrivial to predict wrinkles, especially for complicated structures, such as multilayer or gradient structures. Here, we establish a symplectic analysis framework for the wrinkles and apply it to layered neo-Hookean structures. The symplectic structure enables us to accurately and efficiently solve the eigenvalue problems of wrinkles via the extended Wittrick–Williams (w–W) algorithm. The symplectic analysis is able to exactly predict wrinkles in bi- and triple-layer structures, compared with the benchmark results and finite element simulations. Our findings also shed light on the formation of hierarchical wrinkles

scholarly journals Participative decision making in schools in individualist and collectivist cultures: The micro-politics behind distributed leadership

2021 ◽  
pp. 174114322110013
Author(s):  
Mor Hodaya Or ◽  
Izhak Berkovich
Keyword(s):  
Decision Making ◽  
Distributed Leadership ◽  
Multiple Case Study ◽  
Extreme Case ◽  
Public High Schools ◽  
Case Study Method ◽  
Case Selection ◽  
Multiple Case ◽  
Shed Light

Despite the popularity of distributed leadership theory, the investigation of the micro-political aspects of such models have scarcely been explored, and insights on the cultural variety of distributed practices in schools are limited. The present study aimed to explore what micro-political aspects emerge in participative decision making in collectivist and individualist cultures. To this end, a multiple case study method was adopted, focusing on four Israeli public high schools. Schools were chosen to represent an ‘extreme’ case selection rationale: two non-religious urban schools representing individualist cases, and two communal schools in religious kibbutzim representing communal schools. The analysis shed light on three micro-political points of comparison between the prototypes of participative decision making in collectivist and individualist cultures related to control, actors, and stage crafting. The findings and implications are discussed.

scholarly journals Towards DC Energy Efficient Homes

2021 ◽  
Vol 11 (13) ◽  
pp. 6005
Author(s):  
Daniel Villanueva ◽  
Moisés Cordeiro-Costas ◽  
Andrés E. Feijóo-Lorenzo ◽  
Antonio Fernández-Otero ◽  
Edelmiro Miguez-García
Keyword(s):  
Energy Efficiency ◽  
Electric Vehicles ◽  
Energy Efficient ◽  
Electricity Consumption ◽  
Real Data ◽  
Mean Values ◽  
Led Lighting ◽  
Shed Light

The aim of this paper is to shed light on the question regarding whether the integration of an electric battery as a part of a domestic installation may increase its energy efficiency in comparison with a conventional case. When a battery is included in such an installation, two types of electrical conversion must be considered, i.e., AC/DC and DC/AC, and hence the corresponding losses due to these converters must not be forgotten when performing the analysis. The efficiency of the whole system can be increased if one of the mentioned converters is avoided or simply when its dimensioning is reduced. Possible ways to achieve this goal can be: to use electric vehicles as DC suppliers, the use of as many DC home devices as possible, and LED lighting or charging devices based on renewables. With all this in mind, several scenarios are proposed here in order to have a look at all possibilities concerning AC and DC powering. With the aim of checking these scenarios using real data, a case study is analyzed by operating with electricity consumption mean values.

scholarly journals Becoming a Crorepati: From Glocal TV Game to Grobal Fiction

2020 ◽  
Vol 73 (3) ◽  
pp. 497-520
Author(s):  
Nicola Pozza
Keyword(s):  
Effective Means ◽  
The Novel ◽  
Cultural Products ◽  
Slumdog Millionaire ◽  
Interactive Nature ◽  
Tv Show ◽  
Shed Light ◽  
The Way

AbstractNumerous studies have dealt with the process of globalization and its various cultural products. Three such cultural products illustrate this process: Vikas Swarup’s novel Q and A (2005), the TV quiz show Kaun banega crorepati? (Who Wants to Be a Millionaire?), and Danny Boyle’s film Slumdog Millionaire (2008). The novel, the TV show and the film have so far been studied separately. Juxtaposing and comparing Q and A, Kaun banega crorepati, and Slumdog Millionaire provides an effective means to shed light on the dialogic and interactive nature of the process of globalization. It is argued through this case study that an analysis of their place of production, language and content, helps clarify the derivative concepts of “glocalization” and “grobalization” with regard to the way(s) contemporary cultural products respond to globalization.

scholarly journals Education for Social Change: The Case of Teacher Education in Wales

2021 ◽  
Vol 13 (15) ◽  
pp. 8574
Author(s):  
Rebecca Weicht ◽  
Svanborg R. Jónsdóttir
Keyword(s):  
Teacher Education ◽  
Social Change ◽  
Teacher Educators ◽  
Entrepreneurial Education ◽  
Constructive Learning ◽  
Study Approach ◽  
The University ◽  
Action Competence ◽  
Shed Light

Entrepreneurial education offers valuable opportunities for teachers to foster and enhance creativity and action competence, which are also important for sustainability education. The University of Wales Trinity Saint David (UWTSD) is a leader in the development of entrepreneurial education in teacher education both in Wales and internationally. The objective of this article is to shed light on how an entrepreneurial education approach can help foster social change. The aim of this study is to learn from teacher educators at UWTSD about how they support creativity, innovation, and an enterprising mindset in their learners. A case study approach is applied. By analysing documentary evidence such as module and assignment handbooks, we explore how teacher educators at UWTSD deliver entrepreneurial education for social change. Our findings indicate that UWTSD’s development of entrepreneurial education in teacher training has enabled constructive learning, cultivating creativity and action competence. We provide examples that display how the intentions of the Curriculum for Wales and entrepreneurial education approaches of the UWTSD emerge in practice. These examples show outcomes of the entrepreneurial projects that evince the enactment of social change. The findings also show that the educational policy of Wales supports entrepreneurial education throughout all levels of the educational system.

scholarly journals Stability charts based on the finite element method for underground cavities in soft carbonate rocks: validation through case-study applications

2019 ◽  
Vol 19 (10) ◽  
pp. 2079-2095 ◽  
Author(s):  
Michele Perrotti ◽  
Piernicola Lollino ◽  
Nunzio Luciano Fazio ◽  
Mario Parise
Keyword(s):  
Finite Element ◽  
Safety Margin ◽  
Structural Elements ◽  
The Finite Element Method ◽  
Geometrical Features ◽  
Overall Stability ◽  
Underground Cavities ◽  
The Stability ◽  
Rock Mechanical Properties

Abstract. The stability of man-made underground cavities in soft rocks interacting with overlying structures and infrastructures represents a challenging problem to be faced. Based upon the results of a large number of parametric two-dimensional (2-D) finite-element analyses of ideal cases of underground cavities, accounting for the variability both cave geometrical features and rock mechanical properties, specific charts have been recently proposed in the literature to assess at a preliminary stage the stability of the cavities. The purpose of the present paper is to validate the efficacy of the stability charts through the application to several case studies of underground cavities, considering both quarries collapsed in the past and quarries still stable. The stability graphs proposed by Perrotti et al. (2018) can be useful to evaluate, in a preliminary way, a safety margin for cavities that have not reached failure and to detect indications of predisposition to local or general instability phenomena. Alternatively, for sinkholes that already occurred, the graphs may be useful in identifying the conditions that led to the collapse, highlighting the importance of some structural elements (as pillars and internal walls) on the overall stability of the quarry system.

Linguistic Evidence for ‘Romanization’: Continuity and Change in Romano-British Onomastics: A Study of the Epigraphic Record with Particular Reference to Bath

Britannia ◽  
2007 ◽  
Vol 38 ◽  
pp. 35-61 ◽  
Author(s):  
Alex Mullen
Keyword(s):  
Online Database ◽  
Personal Names ◽  
Archaeological Material ◽  
Continuity And Change ◽  
Introductory Section ◽  
Literary Sources ◽  
Linguistic Evidence ◽  
Roman Culture ◽  
Shed Light

Based on a new online database of Celtic personal names, this research demonstrates how the study of Romano-British onomastics can shed light on the complexities of linguistic and cultural contacts, complementing archaeological material and literary sources. After an introductory section on methodology, Part One analyses naming formulae and expressions of filiation as evidence for both continuity and change dependent on social and geographical factors. Confusion and contamination between the Latin and Celtic systems proved much less common than on the Continent, where earlier contact with Roman culture and the written tradition for Continental Celtic occasionally facilitated an unusual form of syncretism. Part Two examines the naming formulae attested at Roman Bath and the mechanisms by which Celts adopted Latin names. The case-study of Bath relates continuity and change in both naming formulae and nomenclature to an acceptance of, or resistance to, ‘Romanization’ in Britain.

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