183 research outputs found

    Design and Fabrication of a Roller Imprinting Device for Microfluidic Device Manufacturing

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    Microfluidic devices are gaining popularity in a variety of applications, ranging from molecular biology to bio-defense. However, the widespread adoption of this technology is constrained by the lack of efficient and cost-effective manufacturing processes. This paper focuses on the roller imprinting process, which is being developed to rapidly and inexpensively fabricate micro-fluidic devices. In this process, a cylindrical roll with raised features on its surface creates imprints by rolling over a fixed workpiece substrate and mechanically deforming it. Roller imprinting aims to replace processes that were developed for laboratory scale prototyping which tend to not be scalable and have high equipment requirements and overheads. We discuss the limitations of PDMS soft lithography in large-scale manufacture of microfluidic devices. We also discuss the design, fabrication, and testing of a simple roller imprinting device. This imprinter has been developed based on the principles of precision machine design and is implemented using a three-axis machine tool for actuation and position measurement. A framework for the micromachining of precision imprint rolls is also presented

    Proceedings of the 2021 DigitalFUTURES

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    This open access book is a compilation of selected papers from 2021 DigitalFUTURES—The 3rd International Conference on Computational Design and Robotic Fabrication (CDRF 2021). The work focuses on novel techniques for computational design and robotic fabrication. The contents make valuable contributions to academic researchers, designers, and engineers in the industry. As well, readers encounter new ideas about understanding material intelligence in architecture

    Participatory Planning for a Promised Land: Citizen-Led, Comprehensive Land Use Planning in New York’s Adirondack Park

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    New York’s Adirondack Park is internationally recognized for its biological diversity. Greater in size than Yellowstone, Everglades, Glacier, and Grand Canyon National Park combined, the Adirondacks are the largest protected area within the Northern Appalachian/Acadian Eco-Region and within the contiguous United States. Ecologists, residents of the Park, and others are concerned about rapid land use change occurring within the borders of the Park. Almost half of the six million acres encompassed by the Park boundary is privately-owned, where 80% of land use decisions fall within the jurisdiction of local governments. The comprehensive planning process of one such local government, the Town of Willsboro, New York, was the focus of a Participatory Action Research (PAR), single case study. Using a PAR, mixed methods approach, community-led comprehensive planning integrated natural science, technology and citizen participation. I evaluated the role of PAR in helping to transform conventional land use planning practice into a more democratic, environmentally conscious, and durable civic responsibility. Stakeholder viewpoints about the local environmental setting revealed deep connections to nature. Findings of the research indicate that comprehensive land use planning capacity increases when citizens increase their scientific and ecological literacy, especially when tools such as Geographic Information Systems (GIS) are used for data collection and analysis. Applying ecologically-based comprehensive planning utilizing a PAR framework improved citizen’s confidence in land use decision-making and also expanded science literacy. PAR holds great promise as a methodological framework to bring together ecologically-focused natural science with citizen-led collaborative land use planning. Areas of further research identified during this study include assessing age-specific gaps in stakeholder participation, evaluating the relationship between plan recommendations and regulatory implementation, and investigating factors that contribute to a culture of community engagement. Local land use planning decisions have important cumulative impacts on protected area land development at the local and regional scale. A comprehensive plan can reflect an emergent process, where the primacy of community self-determination and consensus-building yields recognition of the link between, and sanctity of, nature, home, and homeland

    May 4, 1996 (Pages 2081-2156)

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    Association of Architecture Schools in Australasia

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    "Techniques and Technologies: Transfer and Transformation", proceedings of the 2007 AASA Conference held September 27-29, 2007, at the School of Architecture, UTS

    Digital Image Processing

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    This book presents several recent advances that are related or fall under the umbrella of 'digital image processing', with the purpose of providing an insight into the possibilities offered by digital image processing algorithms in various fields. The presented mathematical algorithms are accompanied by graphical representations and illustrative examples for an enhanced readability. The chapters are written in a manner that allows even a reader with basic experience and knowledge in the digital image processing field to properly understand the presented algorithms. Concurrently, the structure of the information in this book is such that fellow scientists will be able to use it to push the development of the presented subjects even further

    Standard Specifications for Road and Bridge Construction, January 1, 2021

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    https://digitalcommons.memphis.edu/govpubs-tn-dept-transportation-standard-specifications/1000/thumbnail.jp

    Systems Engineering

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    The book "Systems Engineering: Practice and Theory" is a collection of articles written by developers and researches from all around the globe. Mostly they present methodologies for separate Systems Engineering processes; others consider issues of adjacent knowledge areas and sub-areas that significantly contribute to systems development, operation, and maintenance. Case studies include aircraft, spacecrafts, and space systems development, post-analysis of data collected during operation of large systems etc. Important issues related to "bottlenecks" of Systems Engineering, such as complexity, reliability, and safety of different kinds of systems, creation, operation and maintenance of services, system-human communication, and management tasks done during system projects are addressed in the collection. This book is for people who are interested in the modern state of the Systems Engineering knowledge area and for systems engineers involved in different activities of the area. Some articles may be a valuable source for university lecturers and students; most of case studies can be directly used in Systems Engineering courses as illustrative materials

    Recovering the wall : enclosure, ethics and the American landscape

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    Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Urban Studies and Planning, 2008.Includes bibliographical references (leaves 211-219).The modern world is marked by legal and political boundaries at all scales; the meeting of two territories is a condition so common as to escape notice in everyday life. Yet the nature of the relationship between these divisions and real things is rarely considered: a barrier at the edge of a territory is taken to embody legal, political, or social difference in simple and transparent ways. This assumption has profound implications for the material and social landscape. Beginning to question it, and suggesting practice in light of these questions, is the goal of this essay. The essay is divided into three parts. The first considers allotment in several ancient, medieval, and early modern societies. It argues that the practice of dividing land was marked over time by growing tensions between law and matter, and that the European settlement of North America was a quantitatively and qualitatively new stage in this process. The second chapter traces these tensions in the domestic and public landscapes of the United States since the nineteenth century, and argues that they present a practical challenge to design and building. The third chapter responds to this challenge. It returns to the wider geography of the first part to find examples of physical boundaries --'walls' -- that not only express territorial difference but stage an array of social and ecological interactions. These examples form the basis for re conceiving the marking of territory: for an ethics of enclosure in the modern landscape.by Brian Thomas Oles.Ph.D

    Historic Conservation Landscapes on Fort Hood, Texas: The Civilian Conservation Corps and Cultural Landscape Change in Central Texas

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    The Civilian Conservation Corps (CCC) was probably the most popular of President Franklin D. Roosevelt's New Deal programs. Many studies have examined the contribution of the CCC in national and state parks and forests, but less attention has been directed towards soil conservation work performed by enrollees on farms and ranches across the country. This dissertation examines cultural landscapes created by the CCC on farms and ranches in Central Texas that are now part of the Fort Hood Military Reservation. Cultural landscapes created by the CCC in the 1930s are significant because they represent large-scale federal government intervention into farming practices and planning on private land. Dramatic transformations occurred in both the conservation movement and on the land itself. This can be investigated through archaeological sites associated with activities of the CCC on Fort Hood from its period of operation (i.e., from 1933 to 1942). The significance of identified archaeological sites is evaluated based on the Secretary of the Interior's guidelines for evaluating archaeological sites for inclusion in the National Register of Historic Places. Through the CCC, America's civilians transformed millions of acres of land across the United States from 1933 to 1942 in an effort to conserve natural resources that had been severely overexploited in preceding decades. Soil conservation and other New Deal agricultural programs primarily benefited land owners, but research on Fort Hood suggests that some tenants and sharecroppers benefited as well. Soil conservation work performed by the CCC on private land changed the way America's farming population operated their farms and included ordinary farmers in the conservation movement. Conservation was no longer the sole concern of academics, but through the efforts of federal, state, and local governments, became a major concern of ordinary farmers. This study also explores how rural planning efforts involved farmers in the decision-making process more than ever before. The reorganization of the rural landscape of Central Texas attests to the degree to which conservation measures were accepted by individual farmers
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