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This paper aims to describe the obtainment of Ti-6Al-4V parts with a hierarchical arrangement of pores by additive manufacturing, aiming at designing orthopedic implants.

The experimental methodology compares microstructural and mechanical properties of Menger pre-fractal sponges of Ti-6Al-4V alloy, manufactured by laser powder bed fusion (LPBF) and electron beam powder bed fusion (EBPBF), with three different porosity volumes. The pore arrangement followed the formation sequence of the Menger sponge, with hierarchical order from 1 to 3.

The LPBF parts presented a martensitic microstructure, while the EBPBF parts presented an α + ß microstructure, independently of its wall thickness. The LPBF parts presented higher mechanical resistance and effective stiffness than the EBPBF parts with similar porosity volume. The stiffness values of the Menger pre-fractal sponges of Ti-6Al-4V alloy, between 4 and 29 GPa, are comparable to those of the cortical bone. Furthermore, the deformation behavior presented by the Menger pre-fractal sponges of Ti-6Al-4V alloy did not follow the Gibson and Ashby model's prediction.

To the best of the authors' knowledge, this is the first study to obtain Menger pre-fractal sponges of Ti-6Al-4V alloy by LPBF and EBPBF. The deformation behavior of the obtained porous parts was contrasted with the Gibson and Ashby model's prediction.

Fractal geometry can be used to model natural objects which cannot be easily represented by the euclidean geometry. However, contemporary computer‐aided design (CAD) and computer‐aided manufacturing (CAM) systems cannot be used to model a fractal object efficiently. In a general layer manufacturing (LM) workflow, a model described by the euclidean geometry is required in order to generate the necessary toolpath information. So this workflow cannot be applied for a fractal object. In this paper, to realize the fabrication of a fractal represented object by the LM technology, a methodology is proposed.

In the proposed methodology, a slab grid is generated in each layer of the object and it consists of a number of pixels. The interior property (corresponding to the fractal object) of each pixel in the slab grid is checked so that slab models of the fractal are created. The boundary of each slab is traced and refined so that the toolpath of the object can be generated from these boundaries.

Applying the proposed methodology, the LM toolpath information can be extracted from the mathematical model of the fractal and the tessellating or slicing processes are not needed to be performed. The problem of representing a fractal in a CAD platform can be eliminated.

The proposed methodology can be applied to iterative function system (IFS) or complex fractal. However, for some fractals constructed from more than one kind of fractal objects, such as multi‐IFS fractals, the methodology must be further developed.

The proposed methodology is a novel development for realizing the fabrication of fractal objects by the LM technology.

The purpose of this paper is to evaluate the sustainability of an academic library 3D printing service. Originally intended to introduce students to an emerging technology, the 3D printing service at the University of Florida (UF) libraries expanded to support teaching, learning and research, allowing faculty, staff and students to engage in the maker movement.

This paper analyzed usage data collected by the library’s 3D printing service from April 2014 through March 2018. These data include the number of prints produced, amount of filament consumed, user academic demographics and whether it is for academic assignments, research or personal projects.

The data show that the initial 3D printing service users were predominantly engineering students; however, over the four-year period, the service has built up a consistent and diverse user base and expanded the number and types of printers. With grants covering the purchase of the 3D printers and a modest charge for printing ($0.15 per gram of model weight), the 3D printing service has achieved a sustainable level.

UF was one of the first academic libraries to offer 3D printing services and has collected four years of data to evaluate the sustainability of the service. These data demonstrate that the service is a valuable and sustainable asset, allowing students and researchers to visualize and innovate in such diverse fields as anthropology, archaeology, art, biology, chemistry and mathematics.

The purpose of this paper is to discuss the changing role of the academic library, in relation to technology support services. It proposes that library technology services should expand to take a central role in developing student academic technology skills, and shows how moving into non-traditional areas of technology support can expand a library’s operation capabilities to include entrepreneurship and innovation for faculty, staff and students.

The paper outlines how our library expanded its technology services to include course management support, technical literacy training and three-dimensional (3D) printing, and details future developments into robotics and software development. It details the authors initial objectives, the issues encountered, the improvements made in response and what the authors hope to do in the future.

We are at a time when technology has made innovation and creation available to many. Academic libraries should take on this opportunity of repositioning technology services to provide and promote technical applications, becoming a central point for library users to share ideas and collaborate on projects. As a result of the interdisciplinary nature of academic libraries, the authors are in the best position to make this happen on campus.

Even though continual change has been a theme in the development of libraries, very little has been written on the role of technology support services. This paper sets the foundation for further exploration in how taking on academic technology support services, 3D printing and makerspaces could be a part of library services.