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As particulate systems evolve, sliding, rolling and collision contacts all produce forces that discrete element method (DEM) methods aim to predict. Verification of friction rarely takes high priority in validation studies even though friction plays a very important role in applications and in mathematical models for numerical simulation. The purpose of this paper is to address sliding friction in finite element method (FEM)/DEM and rolling friction in DEM.

Analytical solutions for “block sliding” were used to verify the authors' tangential contact force implementation of 2D FEM/DEM. Inspired by the kinetic art work Liquid Reflections by Liliane Lijn, which consists of free balls responding within a rotating shallow dish, DEM was used to simulate rolling, sliding and state‐of‐rest of spherical particles relative to horizontal and inclined, concave and flat spinning platforms. Various material properties, initial and boundary conditions are set which produce different trajectory regimes.

Simulation output is found to be in excellent agreement when compared with experimental results and analytical solutions.

The more widespread use of analytically solvable benchmark tests for DEM and FEM/DEM codes is recommended.

We live in the Age of Knowledge, which is impelling us towards the Age of Imagination. The technological wave rises and with it rises a wave of change that will affect both the economy and society. When these two waves will reach the coast where knowledge meets ignorance, and how to ride them, are questions that require us to imagine the future. We must, therefore, embark on the vessel of imagination, leaving behind us the baggage of what we know and understand. Imagination is not just the springboard for ideas; it also acts to connect ideas in different ways that may blossom in the garden of an entrepreneurial renaissance. Symbols, metaphors and concepts that belong to our tacit knowledge come to light in our memory. It is from here that the imagination draws its lifeblood, broadening our horizons, inducing us to interact with others who may be the bearers of other cultures. Are we ready to engage in an imaginative learning process to join business with innovation and art? Are we prepared to design a wide-open white space where the actors of entrepreneurship, innovation and art can generate a constructive tension that will sweep away what appears to be mutual antagonism or incompatibility?

In the century from 1868 to 1969, over 105,000 children were detained in industrial schools in Ireland, having been committed by the courts. The purpose of this paper is to examine, and offer suggestions regarding the contexts of the peer physical and sexual abuse and bullying that went on in the industrial schools.

This paper draws on the accounts of survivors, the results of research conducted by academics and journalists and recent reports compiled by legislative enquiries into industrial schools in Ireland, with particular reference being made to the the six industrial schools run by the Christian Brothers.

The specific parameters of how the industrial school system developed in Ireland rendered detainees powerless and voiceless, and these factors also facilitated the physical and sexual abuse of child and adolescent detainees by adults in this institutions. Serious instances of peer physical and sexual abuse also went on in these schools. It is argued that such patterns of peer abuse are best understood as occurring within the psychosocial contexts of primary adjustment, collaboration and re-enactment.

It is suggested that the context of peer abuse in institutions is important for researchers and practitioners to attend to.

The realities of life in industrial schools in Ireland has been slow to emerge, due to the secrecy with which those institutions have been surrounded. Most accounts have focused on abuse at the hands of adults; this examines peer abuse in those institutions in context.

Two questions broadly drove this research: Donald Trump promised to fix the economy and create jobs, and he is ending or renegotiating trade treaties. Is he creating more jobs? How can Trump create a more inclusive economy? The paper aims to discuss these issues.

This paper closely examines Trump’s economic policies and draws from past Democratic and Republication track records to explain how Trump’s policies will contribute to greater income inequality.

By all measures, President Trump fails on measures of equality, diversity, and inclusion.

This original paper examines the implications of the Trump administration’s policies in the areas of tax cuts (for small- and medium-sized enterprises rather than large corporations), incentives to support small business growth, entrepreneurship training, education and skills training (to retool Americans), and infrastructure spending.