Search results

The purpose of the paper is to propose a homogenization-based topology optimization method to optimize the design of variable-density cellular structure, in order to achieve lightweight design and overcome some of the manufacturability issues in additive manufacturing.

First, homogenization is performed to capture the effective mechanical properties of cellular structures through the scaling law as a function their relative density. Second, the scaling law is used directly in the topology optimization algorithm to compute the optimal density distribution for the part being optimized. Third, a new technique is presented to reconstruct the computer-aided design (CAD) model of the optimal variable-density cellular structure. The proposed method is validated by comparing the results obtained through homogenized model, full-scale simulation and experimentally testing the optimized parts after being additive manufactured.

The test examples demonstrate that the homogenization-based method is efficient, accurate and is able to produce manufacturable designs.

The optimized designs in our examples also show significant increase in stiffness and strength when compared to the original designs with identical overall weight.

A discipline is bound by some combination of a shared subject matter, shared theory, and shared technique. Yet modern economics is seemingly without limit to its domain. As a discipline without a shared subject matter, what is the binding force of economics today? The authors combine topic modeling and text analysis to analyze different approaches to inquiry within the discipline of economics. The authors find that the importance of theory has declined as economics has increasingly become defined by its empirical techniques. The authors question whether this trajectory is stable in the long run as the binding force of the discipline.

The purpose of this chapter is to adopt and demonstrate the value of a political ecology approach in examining sport stadia, particularly stadia in the United States. We attempt to highlight how in the development of stadia key decision-makers sometimes overlook questions of community and environmental health and security.

We took an ontological approach in considering what it means for the stadium to exist in the current political ideological time period. For us, this meant raising questions about how we understand the varying human and nonhuman components of the stadium, and how they connect and influence one another. From there, we outline why political ecology is a useful framework for examining the environmental costs of stadia and their development. We utilize the city of Detroit's decision to provide funding for Little Caesars Arena – home to professional basketball and hockey competitions – to argue that investment in sport stadia creates environmental opportunity costs to the “host” community.

In the case of Detroit, we argue that private economic gain took precedence over community and environmental health and security when decisions were made on infrastructure. Specifically, despite the city going through bankruptcy and locking citizens out of water, the decision was made to provide millions of dollars for the construction of Little Caesars Arena and the development of the land immediately surrounding the arena. Through this, we suggest the need to produce informed case studies surrounding the environmental consideration.

The focus on community and environmental health and security is lacking from the discourse of stadia development in the United States. This chapter seeks to bring this consideration to the forefront by offering a way to examine these issues from a political ecological standpoint, and we urge researchers to conduct case studies using a political ecological framework with a community focus.

The purpose of this paper is to examine the impact of manager influence strategies and innovation attributes on employee attitudes and behaviors in innovation implementation.

Employees (n=237) in a manufacturing company in Taiwan which implemented an e-learning system participated in an online survey. System logs were used as behavioral outcome variables.

Persuasive strategy and relative advantage had a significant positive association with attitudes while relationship-based strategy and complexity had a significant negative association with attitudes. Assertive strategy and relative advantage had a significant positive association with use of the e-learning system, while persuasive strategy, relationship-based strategy, and complexity had a significant negative association with use of the e-learning system. Both relative advantage and complexity mediated the relationship between persuasive strategy and employee attitudes and behaviors. Complexity mediated the relationship between relationship-based strategy and employee attitudes and behaviors.

Managers should use persuasive strategy to inform employees regarding the benefits of the innovation and provide any assistance needed. Managers should be advised to not use relationship-based strategy as it can have an adverse employee impact.

The mediation model uses the diffusion of innovations model and the influence tactics literature to help explain the benefits of certain managerial practices.

The purpose of this essay is to highlight how the digital age makes visible community expression and organization on an international scale.

This project provides a rhetorical analysis of the sub-cultural twitter hashtag “#Palestine2Ferguson”. By focusing on #Palestine2Ferguson, this piece interrogates the ways groups that have been displaced by oppression can build bridges in the new digital age. Through the adaptation of Deluca and Peeples “public screen”, this project reveals how increased sophistication of discernment adds a new “touch” to the screen.

An analysis of #Palestine2Ferguson through the lens of “the public touchscreen” emboldens rhetorical studies understanding of how ethnic/racial minority individuals are capable of self-selecting their method and modes of self-expression when building community.

The transformation of life within the digital age has created an exigence for a reconsideration and expansion of Deluca and Peeples concept of “public screens”.

The theory of third order inference is a theory of how cultural beliefs influence individuals' decisions under conditions of interdependence and uncertainty. In this study, I build on prior work extending the theory to the role of third order information on social trust in public goods dilemmas. Namely, I argue that when second order information on the beliefs of those relevant to the group task are present, this information should influence decision-making over first and third order.

I test this argument in an experimental public goods game. After measuring first order social trust, participants are randomly sorted into one of four conditions – two that pair third and second order information on social trust as parallel and two that pair them as in conflict.

The results suggest that in the presence of second order information on social trust, third order information doesn't have an effect on cooperation.

The study extends the theory of third order inference to understanding the role of social trust at the first, second, and third levels in public goods dilemmas. It puts second order information in competition with third order in predicting cooperation. It suggests that resolving the uncertainty over the second order beliefs of a collective is key to preventing inefficient equilibriums when second and third order beliefs conflict.

This paper aims to present recently published resources on information literacy and library instruction through an extensive annotated bibliography of publications covering all library types.

This paper annotates English-language periodical articles, monographs, dissertations and other materials on library instruction and information literacy published in 2017 in over 200 journals, magazines, books and other sources.

The paper provides a brief description for all 590 sources.

The information may be used by librarians and interested parties as a quick reference to literature on library instruction and information literacy.

The Boulton Vibro Energy Fine Grinding Mill has a wide application in many industries but is of particular interest for the grinding of pigments, producing a rapid increase in the specific area by fine grinding particles to low micron sizes with a narrow band of particle size distribution.

This study examines the relationship between strategic entrepreneurial behaviors (SEBs) and the performance of small and medium-sized enterprises (SMEs) in an emerging market context. The authors expand upon prior work in this area by building and testing a model that assesses the moderating effect of CEOs’ narcissism and Machiavellianism on the relationship between SEBs and SME performance.

To test the authors’ theoretical model, the authors use the results of a larger data collection project in Russia to create a national random sample of 372 Russian SMEs that were approached between August and November 2019.

The authors found support for the positive relationship between SEBs and SME performance. Additionally, the authors found that CEO narcissism and Machiavellianism strengthen the relationship between SEBs and firm performance.

This study is an important step toward enriching the understanding of the role of CEO personality traits in shaping the efficiency of entrepreneurial behavior at the firm level. Extending previous research, the authors show that SEBs have a positive effect on firm performance in an emerging market context. Additionally, the authors contribute insight about how personality characteristics of CEOs, specifically narcissism and Machiavellianism, influence the relationship between entrepreneurial behavior and firm performance. Finally, the authors’ research contributes to the development of strategic leadership theory: the results offer insight to scholars regarding the potentially beneficial attributes of otherwise “dark” leaders.

It is well-known and documented that despite a plethora of efforts by institutions to broaden participation in engineering, the representation, retention, and degree completion of Black males in engineering continues to lag. Coupled with a lack of representation, there is also a dearth of research that has sought to understand the experiences of Black males in engineering. In this chapter, through the lens of Hildegard Peplau's (1991) interpersonal relations theory, we sought to explore the experiences of nine undergraduate Black male engineering majors with academic advisors. Academic advisors are strategically positioned in higher education settings as guides to help students navigate college culture, policies, and procedures. Using thematic analysis, three salient themes emerged: “spots are limited,” building their own “advising team,” and prescriptive perceptions. As institutions imagine routes for broadening participation in engineering, they might also consider how they support advisors and encourage relationship development between students and advisors.