7,168 research outputs found
2021 Home Grounds and Animals PMG - Author Contact List
No full textThis is a chapter of the 2021 Home Grounds and Animals PMG. This 2021 Virginia Pest Management Guide provides the latest recommendations for controlling diseases, insects, and weeds for home grounds and animals. This publication contains information about prevention and nonchemical control as alternatives to chemical control or as part of an integrated pest management approach. The chemical controls in this guide are based on the latest pesticide label information at the time of writing. Because pesticide labels change, read the label directions carefully before buying and using any pesticide. Regardless of the information provided here, always follow the latest product label instructions when using any pesticide. Commercial products are named in this publication for informational purposes only. Virginia Cooperative Extension does not endorse these products and does not intend discrimination against other products that also may be suitable.Peer reviewe
Variability in the Pinna Motions of Hipposiderid Bats, Hipposideros Pratti
No full textBats are known for their highly capable biosonar systems which make them be able to navigate and forage in dense vegetation. Their biosonar system consists of one emitter (nose or mouth) and two receivers (ears). Some bat species, e.g. in the rhinolophid and hipposiderid families, have complicated pinna motion patterns. It has been shown that these pinna motion patterns fall into two distinct categories: rigid motions and non-rigid motions. In the current work, the pinna of Pratt's leaf-nosed bat (Hipposideros pratti) was used as a biological model system to understand how a sensor could benefit from variability. Hence, the variability in the rigid pinna motions and in the non-rigid pinna motions has been investigated by tracking a dense set of landmarks on the pinna surface with stereo vision. Axis-angle representations have shown that the rigid pinna motions exhibited a large continuous variation with rotation axes covering 180 degrees in azimuth and elevation. Distributions of clusters of the landmarks on the pinna surface have shown that the non-rigid pinna motions fall into at least two subgroups. Besides, the acoustic impact of the rigid pinna motions have been investigated using a biomimetic pinna. Normalized mutual information between the acoustic inputs with different rotation axes has shown that different rotation axes can provide at least 50% new sensory information. These results demonstrate that the variability in the pinna motions is an interesting concept for sensor, and how the bats approach that needs to be further investigated.Master of ScienceSensors have been developed for a long time, and they can be used to detect the environments and then deliver the required sensing information. There are many different types of sensors, such as vision-based sensors (infrared camera and laser scanner) and sound-based sensors (sonar and radar). Ultrasonic transducers are one of the sound-based sensors, and they are more stable and reliable in environments where smoke or steam is present. Similar to human-made ultrasonic transducers, bats have developed highly capable biosonar systems that consist of one ultrasonic emitter (nose or mouth) and two ultrasonic receivers (ears), and these biosonar systems enable them to fly and hunt in cluttered environments. Some bats, e.g. rhinolophid and hipposiderid bats, have dynamic noseleaves (elaborate baffle shapes surrounding the nostrils) and pinna (outer ear), and these could enhance the sensing abilities of bats. Hence, the purpose of this thesis has been to investigate this variability to improve the human-made sensors by focusing on the dynamic pinna of the bats. It has been shown that bats have two distinct categories of pinna motions: rigid motions which change only the orientation of the pinna, and non-rigid motions which change also the shape of the pinna. However, the variability within the rigid and non-rigid pinna motions has received little attention. Therefore, the present work has investigated the variability in the rigid pinna motions and in the non-rigid pinna motions. Landmark points were placed on the pinna of certain bats and the pinna motions were tracked by high-speed video cameras. The rigid pinna motions exhibit a large continuous variation in where the pinna is orientated during rotation. Distributions of clusters of the landmarks on the pinna have shown that the non-rigid pinna motions fall into at least two subgroups. The acoustic impacts of the rigid pinna motions have been studied by a biomimetic pinna which reproduced the observed range of the rigid pinna motions. Ultrasonic signals mimicking the bats were emitted to be received by the biomimetic pinna. Based on these signals, it has been shown that different rotation axes and even small changes can provide over 50% new sensory information. These findings give engineers a potential way to improve the human-made sensors
Author Checklist
No full textProvides a checklist to review manuscripts, for content, format, structure of tables, graphs and figures, text citations and references, and other concerns
National bestselling author Barbara Kingsolver to present on local dining at Virginia Tech
No full textAuthor Barbara Kingsolver will visit campus Tuesday, Sept. 14 to present her recent bestseller and this year's Virginia Tech Common Book about eating local food: Animal, Vegetable, Miracle.</p
Award-winning poet and author Jeff Mann to read from his works at Virginia Tech
No full textAward-winning poet and author Jeff Mann of the Virginia Tech Department of English will be reading from his works at the Volume II bookstore on April 8 at 7: p.m
2021 Horticultural and Forest PMG - Authors
No full textHorticultural and Forest Crops 2021 Author Contact ListPeer reviewe
Draft notes on the Seminole Trail (U.S. 29) in Virginia.
No full textNotes on the attempt by the author to find documentation for the origin and validity of the designation of Route 29 in Virginia as the "Seminole Trail"
Investigating beef cattle prices for short time periods
No full textAuthor attempts to add to the knowledge of beef cattle prices. Additional price knowledge should lead to more efficient resource use by those in the beef cattle industryResearch Division Repor
Voices of Virginia: An Auditory Primary Source Reader
No full textVoices of Virginia pulls together stories from oral history collections from across decades and archives to create an all-audio source companion for Virginia’s high school and college students. The "album" is only two hours long, but contains dozens of short oral histories from eyewitnesses to key moments in American history, from the end of the Civil War to the 1980s. The excerpts are downloadable, accessible by smartphone, and accompanied by a transcript. Audio clips are also available on Soundcloud. You’ll also find a brief introduction to each narrator, historical context adapted from experts at Encyclopedia Virginia, American Yawp, and Public Domain sources, and helpful classroom tools like discussion questions, activities, and lesson plans that fit into both the Virginia high school and college U.S. History curriculum. By following the larger national story with narratives from across the Commonwealth, Voices of Virginia grounds students in how history guides and is guided by everyday people and their experiences.
Voices of Virginia is a winner of the 2020 Mason Multi-Media Award from the Oral History Association.
Over twenty archives across Virginia and beyond have generously donated segments, and granted permission for their oral histories to be reproduced and publicly shared under a CC BY NC SA 4.0 license, which ensures that the content remains free to use and re-purpose for all listeners. These archives include:
- African American Historical Society of Portsmouth
- Amherst Glebe Arts Response
- Archives of Appalachia (Eastern Tennessee State University)
- Cape Charles Rosenwald Initiative
- Center for Documentary Studies and the David M. Rubenstein Rare Book and Manuscript Library (Duke University)
- Charles City County Richard M. Bowman Center for Local History
- Chuck Mauro, private collection (Herndon, VA)
- Clarence Dunnaville (American Civil War Museum)
- Desegregation of Virginia Education Project (Old Dominion University)
- Digital Library of Appalachia (Appalachian College Association)
- Eastern Shore of Virginia Barrier Islands Center
- Friends of the Rappahannock
- George Mason University
- Grayson County Historical Society
- Greene County Historical Society
- Mountain Home Center (Bland County Public Schools)
- Old Dominion University Libraries Special Collections and University Archives
- Oral History Archives at Columbia (Columbia University)
- Roanoke Public Library (Southwest Virginia LGBTQ+ History Project)
- Samuel Proctor Oral History Program (University of Florida)
- Southern Foodways Alliance (University of Mississippi)
This material is aligned to the History and Social Science Standards for Virginia Public Schools - March 2015.
The collection was curated by Jessica Taylor, Ph.D. with Emily Stewart.
Feedback regarding this collection is welcome at https://bit.ly/VoicesOfVirginia
This work was made possible in part by a grant from University Libraries at Virginia Tech’s Open Education Initiative.
About the editors
Jessica Taylor is the Director of Public History and an Assistant Professor of Early American and Oral History in the History Department at Virginia Polytechnic Institute & State University (Virginia Tech) where she has been a faculty member since 2018. Jessica completed her Ph.D. in History at the University of Florida and her undergraduate and master's studies at the College of William and Mary. Her research and work focuses on the history of social change in Virginia and the American South, from the colonial period to the present day. Dr. Taylor collaborates with preservation and historical groups across the South to collect and share oral histories, teaches Public History and Native History classes, and is the author of multiple journal articles about historical memory in the South. Her manuscript, Certaine Boundes: Borders and Movement in the Native Chesapeake, explores the lives of Indians and non-elites in seventeenth-century Virginia. Beyond writing, she works to provide opportunities for and be a better teacher to every kind of student. She is always looking for hands-on experiences and conversations about activism, history, archaeology, preservation, museums, and liberal arts education.
Emily Stewart is a student in Virginia Tech's History MA program. She will earn her Master's degree in May, 2020. Emily completed her undergraduate studies at Virginia Tech where she majored in History. Her current research focuses on Virginia educational history in the twentieth century. Her master's thesis focuses on the relationship between standardization and segregation of Virginia public education in the early twentieth century. Throughout her studies at Virginia Tech, Emily has always been interested in oral histories. The Voices of Virginia project presented her with an ideal opportunity to further cultivate her interest in the field of oral and public history.Virginia Tech Open Education Initiative Faculty Grant https://guides.lib.vt.edu/oer/grant
Professor seeks additional nominations for remarkable trees of Virginia project
No full textVirginia Tech forestry professor and Extension specialist Jeffrey Kirwan and outdoor author/lecturer Nancy Ross Hugo will publish a book in 2008 about remarkable trees in Virginia that will commemorate Virginia's first Arbor Day in 1908. They have been seeking nominations from citizens and to date have more than 480 nominations
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