scholarly journals Extensive CGMD Simulations of Atactic PS Providing Pseudo Experimental Data to Calibrate Nonlinear Inelastic Continuum Mechanical Constitutive Laws

Polymers ◽  
2019 ◽  
Vol 11 (11) ◽  
pp. 1824 ◽  
Author(s):  
Maximilian Ries ◽  
Gunnar Possart ◽  
Paul Steinmann ◽  
Sebastian Pfaller

In this contribution, we present a characterization methodology to obtain pseudo experimental deformation data from CG MD simulations of polymers as an inevitable prerequisite to choose and calibrate continuum mechanical constitutive laws. Without restriction of generality, we employ a well established CG model of atactic polystyrene as exemplary model system and simulate its mechanical behavior under various uniaxial tension and compression load cases. To demonstrate the applicability of the obtained data, we exemplarily calibrate a viscoelastic continuum mechanical constitutive law. We conclude our contribution by a thorough discussion of the findings obtained in the numerical pseudo experiments and give an outline of subsequent research activities. Thus, this work contributes to the field of multiscale simulation methods and adds a specific application to the body of knowledge of CG MD simulations.

2019 ◽  
Vol 11 (1) ◽  
pp. 9
Author(s):  
Neno Ruseno ◽  
Mahardi Sadono

Air Traffic Management (ATM) is a discipline that manages the movement of flights in the air and on the ground. Its functions are to maintain the safety level required by the authority and to provide the capacity required by the airlines. The challenges in ATM come from the in-balance between the market growth and the available infrastructure and also the gap between the regulations and the technology. The research in ATM provides the solutions by introducing new methods or technologies to cope with those challenges.  The effort in organizing and cataloging the Body of Knowledge (BOK) in research of ATM is presented in this report. This BOK is a complete set of research concepts and activities in term of managing the air traffic to improve the air transportation safety and its capacity. Considering the latest publications in the last 5 years, the BOK consists of five areas of operation which are enroute, arrival, terminal, departure and connectivity. Each area of operations consists of several knowledge units that contain several research topics. In this report, a special attention is given to the development of ATM research in Indonesian. It characterizes with the challenges that commonly faced in Indonesia such as high density air traffic, in-sufficient infrastructure/technology, in-balance demand and supply during peak hours and major disruption by natural disasters (volcanoes and earth quakes).The report summarizes that the trend of ATM research in Indonesia is in the knowledge unit of capacity optimization. Additionally, it recommends to explore research activities by implementing new air traffic concepts such as the trajectory based operation and the integrated of departure and arrival management to improve capacity, efficiency and safety.


2016 ◽  
Vol 861 ◽  
pp. 137-140
Author(s):  
Enrique Gil ◽  
Jose Vercher ◽  
Carlos Lerma ◽  
Ángeles Mas ◽  
Quiteria Angulo

Nowadays, the rehabilitation of buildings takes more importance due to sustainability reasons. This involves working with existing building structures and the precise calculus of the building to guarantee the adequate strength and safety, from structures with change of use to deteriorated or damaged structures. Concrete is the most common material in building structures, but it is a heterogeneous and non-linear material. The concrete constitutive law, relation between strains and stresses in different directions, is very complex, and different in tension and compression. In the case of new construction project, the linear relationship between stress and strain has been proved safe enough, but it is unable to simulate the behaviour of used and damaged structures, where it is necessary to study the entire load range. In this work, the most widely used constitutive laws of concrete are compared, parameterizing the necessary constants for their professional application in advanced simulation structures software. Some of the evaluated constants are the Young's modulus, Poisson's ratio, stress cracking and crushing, failure energy or the law of damage evolution. Linear-multilinear behaviour, Willam-Warnke crushing and cracking criteria, continuum damage and microplane options are the assessed constitutive laws, showing the differences between the behaviour models and the tightest values of these material constants along the entire load range.


2020 ◽  
Vol 8 (4) ◽  
pp. 79-88
Author(s):  
Teresita Villa G. Lacaba ◽  
Alvin B. Lacaba ◽  
Mamerto A. Caliwan

Teaching is an emotionally demanding work.  To teach, and to teach at one’s best over time, has always required resilience, otherwise conflict within the self and classroom routine will set in.  Anchored on the theories of resilience, motivation, self-determination, personal values, and capability approach, this case study will describe on the consequences of teachers’ resilience on its commitment and effectiveness to teaching.  Eight teachers of the Department of Education assigned in island schools in Guiuan, Eastern Samar will comprise as the participants.  Data generated through in-depth interview, using a semi-structured interview guide will be used and will be kept strictly confidential.  Data generated from the participants will be transmitted verbatim, in-vivo coded and will be compared and contrasted with previous research and theory based literature for triangulation of findings that will add to the body of knowledge and directions for future research activities.


Politeia ◽  
2018 ◽  
Vol 37 (2) ◽  
Author(s):  
Ashanti Kunene

#FeesMustFall was a movement whose maxim was, “This revolution will be intersectional, or it will be bullshit.” This article is a self-reflection on my participation as a so-called radical black intersectional feminist in the #FeesMustFall movement at Stellenbosch University. It is also an attempt to provide evidence of the double erasures taking place in the mainstream patriarchal narratives about the #FeesMustFall movement. My story bears witness to the fact that queer black womxn were the backbone of the movement and that #FeesMustFall did indeed occur at Stellenbosch University. These constitute the double erasures taking place in terms of what is and can be known about the #FeesMustFall movement. My reflections serve to make a much-needed contribution to the body of knowledge produced about the #FeesMustFall movement.


2021 ◽  
pp. 002087282096742
Author(s):  
Emmison Muleya

Successful social reintegration is critical if we are to reduce recidivism and crime in general. This voice of people article presents a background case for why effective offender reintegration services are key in South Africa, and the Eastern Cape in particular, through an example of the Offender Reintegration programme rendered by the National Institute of Crime Prevention and Reintegration of Offenders (NICRO). Apart from the paucity of literature on offender reintegration, very few voices from people working directly with these former offenders are ever heard. Therefore, this article seeks to address this gap by contributing to the body of knowledge on offender social reintegration.


2020 ◽  
Vol 13 (1) ◽  
pp. 96
Author(s):  
Carmen Bălan

The academic literature on consumer engagement and sustainable consumption has developed gradually over the last two decades. The body of knowledge related to the role of food and non-food retailers in this context, however, is only beginning to develop. The purpose of this systematic review is to analyse the existing literature on how retailers fulfil their role in engaging consumers in sustainable consumption. The need for a study with this purpose is proven by the fact that academic literature lacks a systematic review on this topic, despite the ascending trend in the number of published articles in the field. This systematic review is based on a five-step process to ensure quality, replicability, transparency, and reliable conclusions. The reviewed articles were published relatively recently in academic journals from different domains. This review identified seven distinct types of retail marketing interventions (involvement of retailers in marketing actions with the aim to engage consumers in sustainable consumption), 30 types of retail marketing mechanisms (consisting in marketing strategies, techniques, tools, and channels used by retailers), and 14 distinct types of consumer engagement in sustainable consumption patterns. The review suggests an agenda for further research and identifies practical implications for retail management.


Libri ◽  
2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Glenrose Jiyane

Abstract The fourth industrial revolution (4IR) marks the new, advanced era of development in humankind, and globally countries are in the process of ensuring their citizenry’s readiness. In South Africa, various governmental departments, organizations, non-governmental organizations (NGOs) and non-profit organisations (NPOs) are making efforts, through their plans, talks and actions, to attain this status for all her people, particularly women in rural areas. However, the development of women in the rural areas for empowerment remains a concern in developing countries. Consequently, there is a dire need to ensure the developmental status for women in rural areas in the advent of the 4IR, and this paper seeks to demonstrate that information and knowledge may be instrumental in empowering women in rural areas to strive in the 4IR. Accordingly, information and knowledge are a critical resource contributing to the empowerment of women in rural areas for their development. An exploratory question is raised to determine whether South Africa is ready for Fourth Industrial Revolution. The outcome of this paper will contribute to the body of knowledge advocating the importance of information and knowledge in the empowerment of women in rural areas. Significantly, it will generate insights for policymakers on the important role of information and knowledge for women’s development.


2018 ◽  
Vol 25 (4) ◽  
pp. 373-389 ◽  
Author(s):  
Jurandir Peinado ◽  
Alexandre Reis Graeml ◽  
Fernando Vianna

Purpose The purpose of this paper is to assess the differences in importance assigned by manufacturing or service organizations to topics related to operations management and its attendant body of knowledge. Design/methodology/approach The authors did this by cataloguing and analyzing vacancy announcements related to operations management, presented by manufacturing and services companies in major Brazilian human resources websites. Findings The results show that manufacturing companies primarily hire personnel with skills in routine process management, quality management, lean manufacturing, ergonomics and work organization. Service companies generally seek professionals with knowledge and experience in logistics, supply chain management and project management. Research limitations/implications This study presents some limitations that reduce the power of its conclusions. There is some degree of subjectivity in the interpretation of the contents of the analyzed ads. In order to reduce this problem, the authors who did the tabulation of data marked the situations for which there were some doubts about the classification, discussing them with the other author, until they reached a consensus on the best way to classify each one. Originality/value The discussion about the importance assigned by manufacturing and service companies to the topics of operations management is crucial for not only the results obtained, but also to stimulate the debate on topics that comprise or should comprise the body of knowledge of operations management, and the way they are incorporated into business practice. This provides an additional opportunity to reflect on the potential of operations management in supporting business managers now and in the future.


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