Nonlinear FEM based high-speed shell shattering simulation for shelled edible agricultural products:Pecan fruit shattering

This paper introduces an advanced engineering simulation procedure for the nonlinear finite element method (FEM) based high-speed shattering case of shelled edible agricultural products. A high-speed impactor which is targeted at the Pecan fruit (kernel-in-shell) was considered in this case study. Physical compression tests were conducted on Pecan fruit specimens and experimental deformation characteristics were utilized to describe realistic material models in the FEM based engineering simulation. Subsequently, a reverse engineering approach was employed in the solid modeling stage and the Pecan shell shattering case under high-speed loading was simulated, considering the explicit dynamics approach. The effect of the high loading rate on the deformation characteristics of the Pecan fruit components was observed. Visual outputs from the simulation revealed the shattering behavior of the Pecan fruit components under defined boundary conditions. In addition to useful visual simulation outputs, time-dependant stress distributions on the Pecan fruit under high-speed loading rates were represented using graphs. Simulation results have revealed that maximum equivalent stress values were 7.1 (MPa), 5.1 (MPa), and 0.336 (MPa) for shell, packing material, and kernel, respectively. Maximum reaction force at impact was calculated as 996,000 (N). This work contributes to further research into the use of nonlinear numerical method based high-speed deformation simulation studies for shelled edible agricultural products

No Tunes Chime Amidst the Bones: A Zooarchaeological Analysis of Saltpeter Cave (3NW29), an Ozarchaic Bluffshelter in Northwest Arkansas

The Southeastern Ozarks region is a karst limestone environment featuring many sheltered sites, including Saltpeter Cave in Newton County, Arkansas. Early and Middle Archaic components of this site assemblage contain abundant faunal materials that illustrate how Ozarchaic peoples modified their subsistence strategies to accommodate significant climate change that began ~10,000 years ago. I have employed several quantitative techniques, including, density-mediated attrition analysis, diet breadth models, and bone fragmentation patterns to investigate the hunting and trapping practices at this southern Ozarchaic site. I have also employed small mammal representation and correspondence analysis using datasets from Dust Cave, Modoc Rock Shelter, and Little Freeman Cave in Alabama, Illinois, and Missouri respectively to contextualize these practices in a broader landscape. While people living in other regions of the Eastern Woodlands appear to have altered their species selection patterns to cope with these changes, the people occupying Saltpeter Cave retained a selective concentration on forested patches which they quarried for game in what must have been a diverse mosaic landscape between 10,000 and 4,000 cal BP

Study on the Walnut Mechanical Characteristics and Shucking Technology Based on Finite Element Analysis

Part 1: GIS, GPS, RS and Precision FarmingInternational audienceIn order to investigate the shucking technology and design the efficient Sheller, it’s highly significant to study on the mechanical characteristics of walnut. The Pro/E software and finite element method was adopted to build the geometry and finite element model of walnut. Afterwards, the walnut stress distribution with different loads was analyzed to seek the optimum force-applying forms which usually produce the smaller deformation of walnut shell and more local crackles with better expansibility. The results show that the walnut shell can be shelled from the kernel easily when applied with the uniform and linear loads in the direction of shorter axis

2022, UMaine News Press Releases

This is a catalog of press releases put out by the University of Maine Division of Marketing and Communications between January 3, 2022 and October 17, 2022

A New Technological Era for American Agriculture

The report concludes that these technologies have the potential to provide new solutions to many agricultural problems. The challenge, however, will be whether government, industry, and the public can strike the proper balance of direction, oversight, and use to allow these technologies to flourish. Congress will be faced with many issues and choices as American agriculture moves into this new era

Robert Penn Warren: Critical Perspectives

Long recognized as one of America’s foremost men of letters, Robert Penn Warren continues to dazzle us with his many-sided genius. In the haunting images of his poetry, the narrative power of his fiction, the revealing insights of his essays, we find literary achievement of the highest order. Warren’s writing has merited the close attention of literary critics. In this book Neil Nakadate brings together the most important critical essays, including a new essay written for this volume, to give a comprehensive view of the range of Warren’s work. A list of Warren’s published works, 1929-1980, and a useful checklist of critical works on Warren’s writing supplement this rich and balanced collection of essays. Contributors: A.L. Clements, Chester E. Eisinger, Norton R. Girault, Robert B. Heilman, H.P. Heseltine, James H. Justus, Richard Law, Frederick P.W. McDowell, Neil Nakadate, Ladell Payne, M. Bernetta Quinn, John Crowe Ransom, Victor Strandberg, Walter Sullivan, William Tjenos, Simone Vauthier, and Robert Penn Warren Neil Nakadate teaches English at Iowa State University. Useful and engaging. —Sewanee Review A magnificent collection not only as a tribute to Warren, but also as a significant statement of literary trends today. . . . Really invaluable to present and future Warren readers. —Liberal and Fine Arts Reviewhttps://uknowledge.uky.edu/upk_english_language_and_literature_north_america/1037/thumbnail.jp

Federal Register

Daily publication of the U.S. Office of the Federal Register contains rules and regulations, proposed legislation and rule changes, and other notices, including "Presidential proclamations and Executive Orders, Federal agency documents having general applicability and legal effect, documents required to be published by act of Congress, and other Federal agency documents of public interest" (p. ii). Table of Contents starts on page iii

Proceedings of the Sixth Caldwell Conference, St. Catherines Island, Georgia, May 20-22, 2011.

494 pages : illustrations (some color), maps (some color) ; 26 cm. Conference sponsored by the American Museum of Natural History and the St. Catherines Island Foundation.Although this volume covers a broad range of temporal and methodological topics, the chapters are unified by a geographic focus on the archaeology of the Georgia Bight. The various research projects span multiple time periods (including Archaic, Woodland, Mississippian, and contact periods) and many incorporate specialized analyses (such as petrographic point counting, shallow geophysics, and so forth). The 26 contributors conducting this cutting-edge work represent the full spectrum of the archaeological community, including museum, academic, student, and contract archaeologists. Despite the diversity in professional and theoretical backgrounds, temporal periods examined, and methodological approaches pursued, the volume is unified by four distinct, yet interrelated, themes. Contributions in Part I discuss a range of analytical approaches for understanding time, exchange, and site layout. Chapters in Part II model coastal landscapes from both environmental and social perspectives. The third section addresses site-specific studies of late prehistoric architecture and village layout throughout the Georgia Bight. Part IV presents new and ongoing research into the Spanish mission period of this area. These papers were initially presented and discussed at the Sixth Caldwell Conference, cosponsored by the American Museum of Natural History and the St. Catherines Island Foundation, held on St. Catherines Island, Georgia, May 20-22, 2011. TABLE OF CONTENTS: Revising the ¹⁴C reservoir correction for St. Catherines Island, Georgia / David Hurst Thomas, Matthew C. Sanger, and Royce H. Hayes -- An assessment of coastal faunal data from Georgia and northeast Florida / Alexandra L. Parsons and Rochelle A. Marrinan -- Archaeological geophysics on St. Catherines Island : beyond prospection / Ginessa J. Mahar -- Paste variability and clay resource utilization at the Fountain of Youth site, St. Augustine, 8SJ31 / Ann S. Cordell and Kathleen A. Deagan -- Petrographic analysis of pottery and clay samples from the Georgia Bight : evidence of regional social interactions / Neill J. Wallis and Ann S. Cordell -- Past shorelines of the Georgia coast / Chester B. DePratter and Victor D. Thompson -- Coastal landscapes and their relationship to human settlement on the Georgia coast / John A. Turck and Clark R. Alexander -- The role of small islands in foraging economies of St. Catherines Island / Matthew F. Napolitano -- Ever-shifting landscapes : tracking changing spatial usage along coastal Georgia / Matthew C. Sanger -- A paleoeconomic model of the Georgia coast (4500-300 B.P.) / Thomas G. Whitley -- A survey of Irene phase architecture on the Georgia coast / Deborah A. Keene and Ervan G. Garrison -- Life and death on the Ogeechee : a view from the Redbird Creek village / Ryan O. Sipe -- Mission San Joseph de Sapala : mission-period archaeological research on Sapelo Island / Richard W. Jefferies and Christopher R. Moore -- The Guale landscape of Mission Santa Catalina de Guale : 30 years of geophysics at a Spanish colonial mission / Elliot H. Blair -- Missions San Buenaventura and Santa Cruz de Guadalquini : retreat from the Georgia coast / Keith H. Ashley, Vicki L. Rolland, and Robert L. Thunen -- Entangling events : the Guale coastal landscape and the Spanish missions / Victor D. Thompson, John A. Turck, Amanda D. Roberts Thompson, and Chester B. DePratter -- Island and coastal archaeology on the Georgia Bight / Scott M. Fitzpatrick

Maine State Government Administrative Report 1981-1982

https://digitalmaine.com/me_annual_reports/1008/thumbnail.jp