Catalogue Search | MBRL
Are you sure you want to remove the book from the shelf?
{{itemTitle}}
2,890
result(s) for
"Ryan, John C"
Sort by:
Atlas of the 2016 elections
The 2016 election was one of the most dramatic upsets in US history. Explaining the surprising Trump victory, the leading scholars trace the entire gamut of the election. Illustrated with over 100 meticulous full-color maps, the atlas will be an essential reference and a fascinating resource for pundits, voters, campaign staffs, and political junkies.
Book
Post-Processing of 3D-Printed Polymers
Additive manufacturing, commonly known as 3D printing, is an advancement over traditional formative manufacturing methods. It can increase efficiency in manufacturing operations highlighting advantages such as rapid prototyping, reduction of waste, reduction of manufacturing time and cost, and increased flexibility in a production setting. The additive manufacturing (AM) process consists of five steps: (1) preparation of 3D models for printing (designing the part/object), (2) conversion to STL file, (3) slicing and setting of 3D printing parameters, (4) actual printing, and (5) finishing/post-processing methods. Very often, the 3D printed part is sufficient by itself without further post-printing processing. However, many applications still require some forms of post-processing, especially those for industrial applications. This review focuses on the importance of different finishing/post-processing methods for 3D-printed polymers. Different 3D printing technologies and materials are considered in presenting the authors’ perspective. The advantages and disadvantages of using these methods are also discussed together with the cost and time in doing the post-processing activities. Lastly, this review also includes discussions on the enhancement of properties such as electrical, mechanical, and chemical, and other characteristics such as geometrical precision, durability, surface properties, and aesthetic value with post-printing processing. Future perspectives is also provided towards the end of this review.
Journal Article
The Mind of Plants
The idea that plants have a mind of their own has been a prominent feature of some Indigenous narratives, literary works, and philosophical discourses. Recent scientific research in the field of plant cognition similarly highlights the capacity of botanical life to discern between options and learn from prior experiences or, in other words, to think. The Mind of Plants offers an accessible account of the idea of \"the plant mind\" by bringing together short essays and poems on plants and their interactions with humans. The texts interpret the theme broadly-from the ways that humans mind and unmind plants to the mindedness or unmindedness of plants themselves. Authors from the humanities, social sciences, and natural sciences have written about their personal connections to particular plants, reflecting upon their research on plant studies in a style amenable to a broad audience. Each of the authors has selected a plant that functions as a guiding thread to their interpretation of \"the mind of plants.\" From the ubiquitous rose to the ugly hornwort, from the Amazonian ayahuasca to tobacco, the texts reflect the multifarious interactions between humans and flora. These personal narratives, filled with anecdotes, experiences, and musings, offer cutting-edge insights into the different meanings and dimensions of \"the mind of plants.\" Contributors to The Mind of Plants are key figures in the fields of ethnobotany, ethnopharmacology, plant behavior and cognition, and critical plant studies. Included are simple, thumbnail-style, black-and-white illustrations of the plants to enhance readers' appreciation of the narratives.
eBook
Making Open Scholarship More Equitable and Inclusive
Democratizing access to information is an enabler for our digital future. It can transform how knowledge is created, preserved, and shared, and strengthen the connection between academics and the communities they serve. Yet, open scholarship is influenced by history and politics. This article explores the foundations underlying open scholarship as a quest for more just, equitable, and inclusive societies. It analyzes the origins of the open scholarship movement and explores how systemic factors have impacted equality and equity of knowledge access and production according to location, nationality, race, age, gender, and socio-economic circumstances. It highlights how the privileges of the global North permeate academic and technical standards, norms, and infrastructures. It also reviews how the collective design of more open and collaborative networks can engage a richer diversity of communities, enabling greater social inclusion, and presents key examples. By fostering dialogue with multiple stakeholders, more effective avenues for knowledge production and representation can be built based on approaches that are accessible, participatory, interactive, ethical, and transparent, and that reach a far broader public. This expansive vision of open science will lead to a more unified knowledge economy.
Journal Article
Additive manufacturing for COVID-19: devices, materials, prospects, and challenges
The current COVID-19 pandemic has caused the shortage of personal protective equipment (PPE) where improvised manufacturing in particular 3D printing has addressed many needs. This prospective discusses the current global crisis, then follows the wide interest in addressing the shortage of medical devices and PPEs used for treatment and protection against pathogens. An overview of the 3D printing process with polymer materials is given followed by the different 3D printing projects of PPEs and medical devices that emerged for the pandemic (including validation/testing). The potential for rapid prototyping with different polymer materials and eventual high-throughput production is emphasized.
Journal Article
Three-dimensional-printed molds and materials for injection molding and rapid tooling applications
This Prospective covers an overview of the injection molding process and the importance of mold design and tooling considerations, important material requirements and thermal properties for molds, polymer material requirements for injection molding, mold flow analysis, and the promise of using the 3D printing process for mold fabrication. The second part demonstrates the injection molding process using 3D-printed polymer molds and its suitability for low-run productions. 3D-printed molds using stereolithography and fused filament fabrication have been injected with polylactic acid, and the quality of the injected parts was assessed in terms of dimensional accuracy and the damage mechanisms during fabrication.
Journal Article
Thermo-mechanical and swelling properties of three-dimensional-printed poly (ethylene glycol) diacrylate/silica nanocomposites
Three-dimensional (3D) printed poly (ethylene glycol) diacrylate (PEGDA) objects have been reinforced with 1%, 3% and 5% silica (SiO2) nanoparticles. Rheological characterizations were conducted for each formulation and 3D-printed using a stereolithographic apparatus (SLA) 3D printer. The tensile and compressive properties of the as-printed nanocomposites were investigated and compared with unreinforced samples. Additionally, the mechanical properties of the objects before and after swelling the samples in deionized water were compared with as-printed ones. Adding SiO2 increased the tensile and compressive strengths of the 3D-printed PEGDA. The tensile and compressive strengths of swollen PEGDA/SiO2 nanocomposite specimens were generally higher than the unswollen specimens.
Journal Article
Cultural Botany: Toward a Model of Transdisciplinary, Embodied, and Poetic Research into Plants
Since the eighteenth century, the study of plants has reflected an increasingly mechanized and technological view of the natural world that divides the humanities and the natual sciences. In broad terms, this article proposes a context for research into flora through an interrogation of existing literature addressing a rapprochement between ways to knowledge. The natureculture dichotomy, and more specifically the plant-to-human sensory disjunction, follows a parallel course of resolution to the schism between objective (technical, scientific, reductionistic, visual) and subjective (emotive, artistic, relational, multi-sensory) forms of knowledge. The foundations of taxonomic botany, as well as the allied fields of environmental studies, ethnobotany and economic botany, are undergirded by universalizing, sensorylimited visual structuring of the natural world. As the study of everyday embodied interactions of humans with flora, expanding upon the lens of cultural ecology, \"cultural botany\" provides a transdisciplinary research approach. Alternate embodied cultural engagements with flora emerge through a syncretic fusion of diverse methodologies.
Journal Article
3D Printed Injection Molds Using Various 3D Printing Technologies
This paper explores the possibility of using different 3d printing methods and materials in the production of polymer molds for injection molding applications. A mold producing a cube was designed using a commercial software. Following the standard 3d printing process, injection molds which could produce a cube were printed using different 3d printing materials and 3d printing technologies. The 3d printing technologies used were Stereolithography (SLA), Polyjet and Fused Filament Fabrication (FFF). A bench-top injection molding machine was used to inject polylactic acid (PLA) in these molds. The quality of the injected parts in terms of dimensional accuracy has been investigated. In some cases, the damage mechanism of the polymer molds has also been observed.
Journal Article
