1,662 research outputs found
Beyond 3D Printing: The New Dimensions of Additive Fabrication
No full textAdditive fabrication, often referred to as 3D printing, is the construction of objects by adding material. This stands in contrast to subtractive methods, which involve removing material by means of milling or cutting. Although additive fabrication and 3D printing are thought of as synonymous, additive fabrication encompasses a far broader range of construction, and new dimensions are on the horizon, inspiring innovation across scales and applications. For instance, can you print a full-scale building? How can we structurally engineer color and alter on the nanoscale? If trees grow additively, can biology be designed for fabrication
Steven Yedinak Interview
No full textLTC (RET) Steven M. Yedinak commissioned in the U. S. Army Infantry in 1963 and subsequently spent 26 years in Special Forces and Airborne Infantry. He served two combat tours in Vietnam (1966-67 & 1971-1972), and started the Mobile Guerrilla Force. He is the author of Hard to Forget: An American with the Mobile Guerrilla Force in Vietnam (Random House, 1998). He retired from the Army in 1989
A Compound Arm Approach to Digital Construction
No full textWe introduce a novel large-scale Digital Construction Platform (DCP) for on-site sensing, analysis, and fabrication. The DCP is an in-progress research project consisting of a compound robotic arm system comprised of a 5-axis Altec hydraulic mobile boom arm attached to a 6-axis KUKA robotic arm. Akin to the biological model of human shoulder and hand this compound system utilizes the large boom arm for gross positioning and the small robotic arm for fine positioning and oscillation correction respectively. The platform is based on a fully mobile truck vehicle with a working reach diameter of over 80 feet. It can handle a 1,500 lb lift capacity and a 20 lb manipulation capacity. We report on the progress of the DCP and speculate on potential applications including fabrication of non-standard architectural forms, integration of real-time on-site sensing data, improvements in construction efficiency, enhanced resolution, lower error rates, and increased safety. We report on a case study for platform demonstration through large-scale 3D printing of insulative formwork for castable structures. We discuss benefits and potential future applications.National Science Foundation (U.S.) (Early Concept Grants for Exploratory Research (EAGER) Grant Award 1152550
Latitude 24
No full textNative Tan (Chapters 1 -11,) an excerpt of a novel. Philosopher's Stone, a short story. How Baby Bare Came to Ride a Cadillac Car to Fame, a short story.M.F.A.by John Steven Alli
Midwestern Advocate - Volume 2, No. 3 January 1975
No full textSelected Table of Contents The Rich Get Richer and the Poor Get Taxes / Freeman, Harrop Fair Trial and Free Press / Grant, Nathan Setback in Soviet-American Trade Arbitration / Ledray, Patrick W. Interview with Stephen F. Keating / Daffer, Steven Zeepsday / Dickson, Gordon R.
Editorial Board
Bernstein, Lewis S.; Veltman, R. Edward, Jr.; Liguori, John; Lanker, Gary; Drucker, Davidhttps://open.mitchellhamline.edu/husl-newspapers/1005/thumbnail.jp
Grown, Printed, and Biologically Augmented: An Additively Manufactured Microfluidic Wearable, Functionally Templated for Synthetic Microbes
No full textDespite significant advances in synthetic biology at industrial scales, digital fabrication challenges have, to date, precluded its implementation at the product scale. We present, Mushtari, a multimaterial 3D printed fluidic wearable designed to culture microbial communities. Thereby we introduce a computational design environment for additive manufacturing of geometrically complex and materially heterogeneous fluidic channels. We demonstrate how controlled variation of geometrical and optical properties at high spatial resolution can be achieved through a combination of computational growth modeling and multimaterial bitmap printing. Furthermore, we present the implementation, characterization, and evaluation of support methods for creating product-scale fluidics. Finally, we explore the cytotoxicity of 3D printed materials in culture studies with the model microorganisms, Escherichia coli and Bacillus subtilis. The results point toward design possibilities that lie at the intersection of computational design, additive manufacturing, and synthetic biology, with the ultimate goal of imparting biological functionality to 3D printed products.National Science Foundation (U.S.) (DGE1144152)United States. Department of Energy (DE-SC0012658
Novel applications of multipurpose robotic arms spanning design fabrication, utility, and art
No full textThesis (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2012.Cataloged from PDF version of thesis.Includes bibliographical references (p. 204-208).This work investigates, defines, and expands on the use of robotic arms in digital fabrication, design, and art through methods including 3D printing, milling, sculpting, functionally graded fabrication, construction-scale additive manufacturing, jammable granular system design, light painting, and volumetric sensing. While most current applications of robotics in manufacturing rely on repetitive automation and assembly tasks, the flexibility, dexterity, and precision of industrial robotic arms provide for design opportunities of multi-functionary roles. Through exploration and demonstration, a multipurpose fabrication platform was developed using a KUKA KR5 sixx R850 robotic arm. The platform is capable of conventional manufacturing techniques spanning the three traditional fabrication categories: additive, subtractive, and formative. Case studies and digital design fabrication protocols were developed as part of the robotic platform to demonstrate these three types of fabrication including 3D printing, multi-axis milling, and clay sculpting, respectively. Compound processes, such as combining 3D printing and milling, were developed that offer product-, and process-based improvements over standalone techniques. The benefits and drawbacks of a multi-fabrication platform are discussed, including cost, physical footprint, resolution, and flexibility. In addition to replicating conventional manufacturing techniques with a single robotic platform, several novel applications were developed which take advantage of the flexibility of an arm system. First, functionally graded 3D printing was explored using concrete through which density gradients were shown to achieve higher structural efficiency. A novel construction-scale additive manufacturing process capable of 3D printing building components was developed. Secondly, direct recycling 3D printing was developed where waste thermoplastic products are transformed into feedstock and printed into new components within a single operation. Work conducted on jammed granular structures, where external pressure controls system stiffness and strength, resulted in several new formative fabrication possibilities. Combined with robotics, waste-free digital casting using jammable materials was enabled along with a variety of design projects including the design of robotic arms themselves. Finally, the use of robotic arms for fabrication of material and environmental properties without mechanical force transfer was explored. Coined immaterial fabrication,t his fabrication category captures methods that do not fall within the definitions of additive, subtractive, or formative processes. Work produced in this area includes a volumetric sensing technique and robotic light paintings that reveal thermal, electromagnetic, and optical fields.by Steven J. Keating.S.M
From bacteria to buildings : additive manufacturing outside the box
No full textThesis: Ph. D., Massachusetts Institute of Technology, Department of Mechanical Engineering, 2016.Vita. Cataloged from PDF version of thesis.Includes bibliographical references (pages 238-242).Additive manufacturing has been hailed as the next fabrication revolution with visions of customization, decentralization, and rapid production. Yet with over three decades of progress, limitations associated with poor material properties, slow fabrication speeds, expensive cost, and volumetric size constraints continue to disappoint. How can we move beyond the current dimensional limits of additive manufacturing and escape the printer's 'box'? What are the routes to 3D print a house, a microfluidic system, or a biological scaffold? Can we produce an Additive Manufacturing Map? This thesis focuses on expanding the limits of additive manufacturing through novel experimental developments across material, spatial, and temporal dimensions. A dimensional additive manufacturing mapping methodology for plotting theoretical and experimental results is generated and discussed. Research into the material dimension resulted in new additive fabrication techniques for construction. Processes include printed insulated formwork, robotically welded metal chain, and techniques using locally sourced materials (sand, natural fibers, soil, and ice). Research into the spatial dimension includes the design, fabrication, and characterization of a mobile Digital Construction Platform capable of 3D printing architectural-scale structures. The platform has a diametrical reach of over 20 m through a compound arm system and can autonomously drive, gather local materials, self-charge via photovoltaics, and fabricate structures larger than itself. A 14.6 m by 3.7 m proof-of-concept structure was successfully 3D printed onsite with a machine manufacturing time under 13.5 hours. Research into microscopic scale fabrication produced a fractal glass electro-sintering technique and initial investigations into a combination one- and two-photon polymerization 3D printer. Research into the temporal dimension focused on fabrication techniques using biomaterials and living systems, such as thermal deposition of squid sucker ring teeth protein, and 3D printable microfluidics. Developments include printable structures to host cellular life, and the design and characterization of a multi-material microfluidic proportional valve. The projects were evaluated with a dimensional methodology workflow, generating an additive manufacturing map. With this mapping methodology, quantified queries, evaluations, and designs - for various additive fabrication tasks dependent on a value proposition - can be responded to, analyzed, and built.by Steven J. Keating.Ph. D
Changing patterns in vocational education
No full textOne of the long standing issues in education development has been productive job training in rapidly changing economies. The argument has been made that vocational secondary schools are not well equipped for this task. Although vocational and academic schooling often result in similar levels of education and employment, the higher costs of the vocational schooling makes it a less attractive alternative. In the past 23 years of Bank lending for vocational education and training, there has been a clear shift away from vocational secondary schools toward various forms of training, outside the formal education system. Although investment has been shifting into nonformal training, secondary education is in need of new directions. Diversified secondary schools have not provided that direction, leaving questions about how secondary schools might meet social objectives cost effectively.Tertiary Education,Teaching and Learning,Gender and Education,Primary Education,Curriculum&Instruction
Interview of Lou Heldman, Steven Hirsch, and David Williams by Tamar Chute
No full textAndy Axelrod: Student (p. 14) --
Jim Blue: Student (p. 15) --
Bill Caldwell: (p. 17) --
John Champlin: Assistant Professor, Political Science (p. 14) --
Lorraine Cohen: Graduate student (pp. 17, 21, 30) --
Jack Corbally: Provost (pp. 6, 24) --
Bill Caldwell: Vietnam Veterans Against the War leader and Graduate Student (p. 21) --
Novice Fawcett: University President (pp. 7, 9, 24, 29) --
Gene Garver: Student and member of the Student Marshals (pp. 11-12) --
E. Gordon Gee: University President (pp. 7, 29) --
Murray Goldwag: Graduate Student (p. 19) --
Woody Hayes: Head Football Coach (p. 13) --
Ron Hutchinson: Student (p. 17) --
David Kettler: Political Science Professor (p. 14) --
Steve Kling: Undergraduate Student Government President (pp. 3-4, 7-8, 19, 23) --
Jerome Lawrence: Co-author of the play "The Night Thoreau Spent in Jail" --
Robert E. Lee: Co-author of the play "The Night Thoreau Spent in Jail" --
Croff Macklin: OSU student (p. 15) --
John McElroy: Executive Assistant to Governor Rhodes (p. 24) --
John T. Mount: Vice President for Student Affairs (pp. 7-9) --
Arliss Rhoden: Dean of the Graduate School (pp. 5-6) --
James Rhodes: Ohio Governor in 1970 (pp. 8, 23-24) --
Jim Robinson: Vice President for Academic Affairs and Provost of the University (p. 24) --
Tim Sheeran: Undergraduate Student Government President (p. 3) --
Ira Sulley: Student (pp. 22, 30)The media can be accessed here: http://streaming.osu.edu/knowledgebank/university_archives/Heldman_Hirsch_and_Williams_062810.mp4David Williams grew up in Tiffin, Ohio; the first member of his family to attend college, Ohio State was the only school he ever considered. Lou Heldman grew up in Cincinnati, and was also the first of his family to attend college. He chose Ohio State for its Journalism program. Steven Hirsch grew up in Pittsburgh, and chose Ohio State because of family connections, a scholarship and the fact that Columbus was still relatively close to home. They all met at Ohio State and were witness to the events leading up to, and culminating in, the student riots in May, 1970. Each describes his own experiences with the demonstrations, including interactions with the University administrators, student government representatives, police and National Guardsmen, and Ohio leaders
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