scholarly journals Effect of Material and Process Specific Factors on the Strength of Printed Parts in Fused Filament Fabrication: A Review of Recent Developments

Materials ◽  
2019 ◽  
Vol 12 (10) ◽  
pp. 1664 ◽  
Author(s):  
Muhammad Harris ◽  
Johan Potgieter ◽  
Richard Archer ◽  
Khalid Mahmood Arif
Keyword(s):  
Low Cost ◽  
High Strength ◽  
Future Research ◽  
Fused Filament Fabrication ◽  
Recent Developments ◽  
Future Research Directions ◽  
Specific Factors ◽  
Process Factors ◽  
The Relationship ◽  
Strength And Ductility

Additive manufacturing (AM) is rapidly evolving as the most comprehensive tool to manufacture products ranging from prototypes to various end-user applications. Fused filament fabrication (FFF) is the most widely used AM technique due to its ability to manufacture complex and relatively high strength parts from many low-cost materials. Generally, the high strength of the printed parts in FFF is attributed to the research in materials and respective process factors (process variables, physical setup, and ambient temperature). However, these factors have not been rigorously reviewed for analyzing their effects on the strength and ductility of different classes of materials. This review systematically elaborates the relationship between materials and the corresponding process factors. The main focus is on the strength and ductility. A hierarchical approach is used to analyze the materials, process parameters, and void control before identifying existing research gaps and future research directions.

Murder-suicide: bridging the gap between mass murder, amok, and suicide

2015 ◽  
Vol 7 (3) ◽  
pp. 179-186 ◽  
Author(s):  
Christopher Ryan Hagan ◽  
Matthew C Podlogar ◽  
Thomas E Joiner
Keyword(s):  
Psychological Research ◽  
Research Literature ◽  
Mass Murder ◽  
Future Research ◽  
Research Directions ◽  
Content Type ◽  
Recent Developments ◽  
Future Research Directions ◽  
Relationship Of ◽  
The Relationship

Purpose – The purpose of this paper is to review the existing literature on mass murder and amok, and the relationship of these phenomena to murder-suicide as well as to determine future research directions. Design/methodology/approach – Research literature on mass murder, amok, and murder-suicide was reviewed in the context of recent developments in the understanding of suicide, aggressive behavior, and psychiatric diagnostics. Findings – Amok, typically viewed as a culture-bound disorder, occurs throughout the world and is best characterized as mass murder, similar to school shootings. Additionally, the phenomenon of mass murder may be best understood as a form of murder-suicide, related to the phenomenon of suicide-by-cop. Originality/value – This paper provides a review of the literature on murder-suicide, mass murder, and amok spanning over 110 years in the context of modern psychological research, new insights into the possible motivations of those who “run amok” and commit mass murder and provides future research directions for this important phenomenon.

The Entrepreneurship Educator: Understanding Role Identity

2020 ◽  
pp. 251512742097966
Author(s):  
Birgitte Wraae ◽  
Candida Brush ◽  
Shahrokh Nikou
Keyword(s):  
Role Identity ◽  
Future Research ◽  
Analysis Tool ◽  
Perceptions Of Students ◽  
Significant Research ◽  
Future Research Directions ◽  
The Relationship ◽  
Role Identity Theory ◽  
Depth Interviews

Significant research explores effectiveness of entrepreneurial curriculum, teaching innovations and programs, but less often studied is the role of entrepreneurship educators. The way that the educator sees his or her role relative to the students is of critical importance because this directly influences pedagogy choices, expectations for students and learning outcomes, as well as job satisfaction. While recent studies propose typologies characterizing pedagogical approaches of educators, few of these are based on the data from entrepreneurship educators. Framed within role identity theory, we conducted 13 in–depth interviews to examine how entrepreneurship educators perceive their role. Using the qualitative data analysis tool (NVivo), we analyzed how the relationship between their perceptions of their role and core value orientation is connected to teaching approaches. Results show that these educators view their roles as teacher-focused, network-focused, or student-focused and that these perspectives are associated with different perceptions of students’ role and learning objectives. Further, we find different levels of emphasis on roles and that personal core values are differentially linked to these roles. Implications and future research directions are discussed.

Frontiers in Service Science: Fintech Operations—An Overview of Recent Developments and Future Research Directions

2021 ◽  
Vol 13 (1) ◽  
pp. 19-35
Author(s):  
Baile Lu ◽  
Shuai Hao ◽  
Michael Pinedo ◽  
Yuqian Xu
Keyword(s):  
Future Research ◽  
Algorithmic Trading ◽  
Payment Systems ◽  
Research Directions ◽  
Operational Risks ◽  
Technology Industry ◽  
Recent Developments ◽  
Future Research Directions ◽  
Conclusion Section ◽  
Financial Technology

In this paper, we provide a survey of recent developments in the fintech (financial technology) industry, focusing on the operational structures, the technologies involved, and the operational risks associated with the new systems. In particular, we discuss payment systems, algorithmic trading, robo-advisory, crowdfunding, and peer-to-peer lending. In the conclusion section, we discuss various promising research directions.

Nonlinear Vibrations of Plates: An Update of Recent Research Developments

1996 ◽  
Vol 49 (10S) ◽  
pp. S55-S62 ◽  
Author(s):  
M. Sathyamoorthy
Keyword(s):  
Nonlinear Vibrations ◽  
Laminated Composite ◽  
Composite Plates ◽  
Future Research ◽  
Research Directions ◽  
Inertia Effects ◽  
Vibration Behavior ◽  
Recent Developments ◽  
Complicating Factors ◽  
Future Research Directions

This paper comprises a survey on the nonlinear vibration analysis of plates, with emphasis on research carried out since 1987. Most of the research reviewed here deals with the effects of geometric nonlinearity on the vibration behavior of plates. Complicating factors such as material nonlinearity, geometric imperfections, transverse shear and rotatory inertia effects, and magnetic fields on the vibration behavior are included. Recent developments in the analytical and numerical methods of solution of isotropic, orthotropic as well as laminated, composite plates are presented. Experimental, analytical, and numerical investigations are included for all the cases reviewed and some general remarks are presented along with suggestions for future research directions.

scholarly journals Challenges and Opportunities in Robotic Food Handling: A Review

2022 ◽  
Vol 8 ◽  
Author(s):  
Zhongkui Wang ◽  
Shinichi Hirai ◽  
Sadao Kawamura
Keyword(s):  
Low Cost ◽  
Food Products ◽  
Future Research ◽  
Food Handling ◽  
Research Directions ◽  
Fundamental Information ◽  
Food Recognition ◽  
Challenges And Opportunities ◽  
Future Research Directions ◽  
End Effectors

Despite developments in robotics and automation technologies, several challenges need to be addressed to fulfill the high demand for automating various manufacturing processes in the food industry. In our opinion, these challenges can be classified as: the development of robotic end-effectors to cope with large variations of food products with high practicality and low cost, recognition of food products and materials in 3D scenario, better understanding of fundamental information of food products including food categorization and physical properties from the viewpoint of robotic handling. In this review, we first introduce the challenges in robotic food handling and then highlight the advances in robotic end-effectors, food recognition, and fundamental information of food products related to robotic food handling. Finally, future research directions and opportunities are discussed based on an analysis of the challenges and state-of-the-art developments.

scholarly journals The Next Generation

2011 ◽  
pp. 57-78 ◽  
Author(s):  
Agnes Kukulska-Hulme ◽  
Chris Jones
Keyword(s):  
Future Research ◽  
Net Generation ◽  
Educational Systems ◽  
Recent Experience ◽  
Place And Space ◽  
Pedagogical Design ◽  
Design For Learning ◽  
Future Research Directions ◽  
The Relationship

Focusing on intermediate and institutional levels of design for learning, this chapter explores how institutional decisions relate to design, using recent experience at The Open University as a case study. To illuminate the relationship between institutional decisions and learner-focused design, we review and bring together some of the research on learner practices in mobile and networked learning. We take a critical stance in relation to the concept of generation, which has been applied to understanding learners of different ages using terms such as net generation and digital natives. Following on from this, we propose an integrated pedagogical design approach that takes account of learner practices, spaces for learning, and technologies. The chapter also proposes future research directions focused on the changing context for learning, a distinction between place and space and an understanding of how the different levels of educational systems interact with mobile and networked technologies.

Tensile properties of the FFF-processed thermoplastic polyurethane (TPU) elastomer

2021 ◽  
Author(s):  
Budi Arifvianto ◽  
Teguh Nur Iman ◽  
Benidiktus Tulung Prayoga ◽  
Rini Dharmastiti ◽  
Urip Agus Salim ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Low Cost ◽  
Thermoplastic Polyurethane ◽  
High Strength ◽  
Tensile Tests ◽  
Uniaxial Tensile ◽  
Fused Filament Fabrication ◽  
Raster Angle ◽  
Manufacturing Techniques

Abstract Fused filament fabrication (FFF) has become one of the most popular, practical, and low-cost additive manufacturing techniques for fabricating geometrically-complex thermoplastic polyurethane (TPU) elastomer. However, there are still some uncertainties concerning the relationship between several operating parameters applied in this technique and the mechanical properties of the processed material. In this research, the influences of extruder temperature and raster orientation on the mechanical properties of the FFF-processed TPU elastomer were studied. A series of uniaxial tensile tests was carried out to determine tensile strength, strain, and elastic modulus of TPU elastomer that had been printed with various extruder temperatures, i.e., 190–230 °C, and raster angles, i.e., 0–90°. Thermal and chemical characterizations were also conducted to support the analysis in this research. The results obviously showed the ductile and elastic characteristics of the FFF-processed TPU, with specific tensile strength and strain that could reach up to 39 MPa and 600%, respectively. The failure mechanisms operating on the FFF-processed TPU and the result of stress analysis by using the developed Mohr’s circle are also discussed in this paper. In conclusion, the extrusion temperature of 200 °C and raster angle of 0° could be preferred to be applied in the FFF process to achieve high strength and ductile TPU elastomer.

A Cross-Cultural Review of Workplace Deviance Research

2020 ◽  
pp. 23-46
Author(s):  
Selcen Kılıçaslan Gökoğlu ◽  
Engin Bağış Öztürk
Keyword(s):  
Cultural Differences ◽  
Cross Cultural ◽  
Workplace Deviance ◽  
Future Research ◽  
Moderator Variable ◽  
Negative Behaviors ◽  
Deviant Behaviors ◽  
Cross Cultural Differences ◽  
Recent Developments ◽  
Future Research Directions

In the last two decades, workplace deviance becomes one of the most important topics to understand negative behaviors at work. However, many of the studies that examine deviance take a universal perspective and undermine cross-cultural differences. To address this gap, this chapter focuses on cross-cultural differences and its relationship with deviant workplace behaviors. The authors claim that cross-cultural differences can play an important role as an antecedent and/or moderator variable in influencing deviant behaviors. In order to discuss these effects, they first summarize recent developments in individualism-collectivism, tightness-looseness, and honor cultures. Based on their interpretations, target-oriented deviance might be highly contextualized in collectivist cultures, form of deviance and contents of deviance could be different from honor to dignity cultures. In addition, deviant behaviors as responses to specific events might differ whether a person belongs in a tight culture or not. The implications of our arguments and future research directions are discussed.

Personal Digital Collections

2011 ◽  
pp. 285-304 ◽  
Author(s):  
Paul F. Marty ◽  
Scott Sayre ◽  
Silvia Filippini Fantoni
Keyword(s):  
Cultural Heritage ◽  
System Design ◽  
Lessons Learned ◽  
Future Research ◽  
Digital Collections ◽  
Research Directions ◽  
Digital Collection ◽  
Future Research Directions ◽  
Museum Websites ◽  
The Relationship

Personal digital collections systems, which encourage visitors to museum websites to create their own personal collections out of a museum’s online collections, are the latest trend in personalization technologies for museums and other cultural heritage organizations. This chapter explores the development, implementation, and evaluation of different types of personal digital collection interfaces on museum websites, from simple bookmarking applications to sophisticated tools that support high levels of interactivity and the sharing of collections. It examines the potential impact of these interfaces on the relationship between museums and their online visitors, explores the possible benefits of involving users as co-creators of digital cultural heritage, and offers an analysis of future research directions and best practices for system design, presenting lessons learned from more than a decade of design and development of personal digital collections systems on museum websites.

Hacia una conclusión

2020 ◽  
pp. 322-330
Author(s):  
Allison Margaret Bigelow
Keyword(s):  
Research Ethics ◽  
Indigenous Studies ◽  
Future Research ◽  
Research Directions ◽  
Theoretical Approaches ◽  
Colonial Archives ◽  
History Of ◽  
Future Research Directions ◽  
Historical Silences ◽  
The Relationship

This chapter reviews the major methodological and theoretical approaches used in Mining Language, at once concluding the book and gesturing toward future research directions in the fields of history of colonial science and technology and Indigenous Studies. Specifically, it reflects on the relationship between history and literary studies within these intersecting fields. By reflecting on what colonial archives say and do not say, the conclusion argues for the importance of research ethics and methods that confront, acknowledge, and respond to historical silences.

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