Factors Affecting Variability in Strategic Highway Research Program Binder Tests

Author(s):  
David A. Anderson ◽  
Mihai O. Marasteanu ◽  
James M. Mahoney ◽  
Jack E. Stephens

Two binder technician workshops were held in January 1998, one at the Connecticut Advanced Pavement Laboratory at the University of Connecticut and one at the Northeast Center of Excellence for Paving Technology at Pennsylvania State University. These workshops were followed by a second set in 1999. The overall objective was to improve the repeatability of the test methods used to grade Superpave® asphalt binders. During the workshops, participants demonstrated and discussed the techniques used in their own laboratories. A document, Manual of Practice for Testing Asphalt Binders in Accordance with the Superpave PG Grading System, was developed for use by asphalt binder technicians and as a training aid for a proposed binder technician certification program. The results of the discussions that were held during the workshops and the items that are presented in the manual of practice are summarized. The results were grouped into four main categories: ( a) handling, sampling, and sample preparation; ( b) temperature measurements; ( c) equipment calibration; and ( d) testing procedures. The items discussed here and in the manual of practice supplement and clarify the current AASHTO test methods. The test methods in themselves are not sufficient to ensure uniformity in testing practice from one laboratory to the other.

Author(s):  
Rodney R. White

The author is a Professor of Geography at the University of Toronto and former Director of the Institute for Environmental Studies. His research interests are in urban environmental management/urban infrastructure; adaptation to climate change; catastrophes, environmental liability and the insurance industry; and risk analysis and environmental finance. He has extensive overseas experience, especially in Africa and China. He was the Principal Investigator for the GIS-based Soil Erosion Management Project in North China and for the Toronto component of the Sustainable Water Management Project in the Beijing-Tianjin Region, both funded by CIDA. He has held teaching appointments at North-western University, McMaster University and Ibadan University, and has also taught short courses in Senegal, Malawi and Vietnam. He holds degrees in geography from Oxford (B.A., 1965), Pennsylvania State University (M.Sc., 1967) and Bristol University (Ph.D, 1971). His most recent books are Building the Ecological City, published by Woodhead Publishing in 2002 and Environmental Finance: A Guide to Environmental Risk Assessment and Financial Products (with Sonia Labatt) published by Wiley in 2002. The text that follows is an edited version of a paper presented at the international symposion on "The Natural City," Toronto, 23-25 June, 2004, sponsored by the University of Toronto's Division of the Environment, Institute for Environmental Studies, and the World Society for Ekistics.


Author(s):  
Shanique Grant ◽  
Alicia Marshalleck

Increasing energy demands and diminishing fuel supplies have left nations desirous of avenues to minimize their reliance on traditional energy sources and a need to infuse supplementary technologies. Biogas technology is one such trajectory that can contribute to the reduction of dependency on fossil fuel as well as allay environmentally problems. The University of Technology, Jamaica (UTech) and Pennsylvania State University (PSU), in pursuit of investigating the potential of biogas in the agricultural sectors of Jamaica and Pennsylvania, United States, sought to use biogas generated from livestock (chicken, swine and cow) waste as an alternative energy source. A 32 factorial design resulted in the construction of seven (7) laboratory scale biodigesters, each with a volumetric capacity of 8 L. Variations of the ratio, (i.e. chicken manure in combination with pig or cow manure) and retention time enabled the monitoring of biogas flow-rates, temperature, pH, residual mass along with percentage methane production. From the data collected mathematical models relating the flow-rate and percentage methane concentration were deduced in order to facilitate the design of a pilot scale digester on the Silverdene poultry farm in the Parish of St. Catherine, Jamaica.


2006 ◽  
Vol 1 (1) ◽  
pp. 85-88 ◽  
Author(s):  
Lynne M. Borden ◽  
Daniel F. Perkins ◽  
Margaret Stone

Online surveys are increasingly viewed as a method to expand research and evaluation capacity. This article focuses on a case study utilizing online surveys for data collection conducted by researchers at the Pennsylvania State University and the University of Arizona. The National Youth Participation Study makes use of computer technology and the interest youth have in such technology. Online methods, survey design, techniques when surveying youth and lessons learned in developing the online study are shared by the authors.


2000 ◽  
Vol 10 (3) ◽  
pp. 631-636 ◽  
Author(s):  
Jennifer Campbell Bradley ◽  
Tammy Kohlleppel ◽  
Tina M. Waliczek ◽  
Jayne M. Zajicek

Researchers at the University of Florida and Texas A&M University developed a survey to gain insight into demographic and educational influences on undergraduate students who major in horticulture. Five universities participated in the study of undergraduate horticulture programs. These included the University of Florida, Texas A&M University, Oklahoma State University, University of Tennessee, and Kansas State University. About 600 surveys were sent to schools during the 1997 fall semester. The questionnaires were completed by horticulture majors and nonmajors taking classes in horticulture departments. The survey consisted of two main sections. The first section, which was completed by all students, explored student demographic information, high school history, university history, and horticulture background. Only horticulture majors completed the second section, which examined factors influencing choice of horticulture as a major. Statistically significant differences were found between horticulture majors and nonmajors when comparing the two groups on the variables of transfer status, gardening experiences, and the importance of gardening. There was a significantly higher percentage of transfer students among horticulture majors. The decision to major in horticulture occurred somewhat early in academic programs, with the largest representations in high school or early in college. Overall, majors had more gardening experience than nonmajors and considered the hobby of gardening as a strong influence in choosing their major. This information should be considered in recruitment efforts since students reported that this interest fostered in them a desire to pursue horticulture as a major. School garden programs at the primary level and horticulture classes at the high school level could possibly influence more students to choose horticulture as a major at the college level. Currently, trends in recruiting efforts in academic programs at the university level are intense and competitive, as students are given more and more career option information. Consequently, data from this study may be useful for horticulture departments developing targeted recruiting programs.


2021 ◽  
Vol 8 (1) ◽  
Author(s):  
Rebecca E. Dutch ◽  
Anna E. Whitfield

Michael M. Goodin, a distinguished plant virologist who was a Professor of Plant Pathology at the University of Kentucky, passed away on December 12, 2020, in Lexington, Kentucky, at the age of 53. Michael was born in Jamaica. He was an undergraduate at Brock University in Canada, where he received degrees in both Biology and Chemistry in 1989. He then moved to Pennsylvania State University, where he trained with C. P. Romaine and received MS and PhD degrees in Plant Pathology. He was a postdoctoral fellow with Andy Jackson at the University of California, Berkeley, from 1996 to 2002 and then joined the faculty in the Department of Plant Pathology at the University of Kentucky in 2002. His strong research record, outstanding work as an educator, and dedication to university, professional scientific, and community service led to his advancement to Professor in 2017. Michael was known throughout the virology community as a passionate scientist who believed in the power of research and education to change the world, as well as a kind, engaged, energetic, and highly interactive colleague. He will be profoundly missed.


1990 ◽  
Vol 19 (1) ◽  
pp. 3-4
Author(s):  
Harvey Glickman

This ISSUE is almost totally comprised of the first half of a two part publication series that relates Africanists to the Africa policy of the U.S. government. As a whole, the two parts—in this and the next ISSUE —review the relationship of the opinions and the activities of the Africanist community outside the U.S. government (mainly academics) to the thrust and substance of policy and the process of policy-making inside the U.S. government. The two major articles in the present ISSUE—on Africanists and U.S. foreign and national security policy by Larry Bowman of the University of Connecticut, and on Africanists and U.S. economic assistance policy by Michael Bratton of Michigan State University—represent the first part.


Author(s):  
Douglass F. Taber

John F. Hartwig of the University of California, Berkeley showed (Nature 2012, 483, 70) that intramolecular C–H silylation of 1 selectively gave, after oxidation and acetylation, the bis acetate 2. Gong Chen of Pennsylvania State University coupled (J. Am. Chem. Soc. 2012, 134, 7313) 3 with 4 to give the ether 5. M. Christina White of the University of Illinois effected (J. Am. Chem. Soc. 2012, 134, 9721) selective oxidation of the taxane derivative 6 to the lactone 7. Most of the work on C–H functionalization has focused on the formation of C–C, C–O, and C–N bonds. Donald A. Watson of the University of Delaware developed (Angew. Chem. Int. Ed. 2012, 51, 3663) conditions for the complementary conversion of an alkene 8 to the allyl silane 9, a powerful and versatile nucleophile. Kilian Muniz of ICIQ Tarragona oxidized (J. Am. Chem. Soc. 2012, 134, 7242) the enyne 10 selectively to the amine 11. Phil S. Baran of Scripps/La Jolla devised (J. Am. Chem. Soc. 2012, 134, 2547) a protocol for the OH-directed amination of 12 to 13. Professor White developed (J. Am. Chem. Soc. 2012, 134, 2036) a related OH-directed amination of 14 to 15 that proceeded with retention of absolute configuration. Tom G. Driver of the University of Illinois, Chicago showed (J. Am. Chem. Soc. 2012, 134, 7262) that the aryl azide 16 could be cyclized directly to the amine, which was protected to give 17. As illustrated by the conversion of 18 to 20 devised (Adv. Synth. Catal. 2012, 354, 701) by Martin Klussmann of the Max-Planck-Institut, Mülheim, C–H functionalization can be accomplished by hydride abstraction followed by coupling of the resulting carbocation with a nucleophile. Olafs Daugulis of the University of Houston used (Angew. Chem. Int. Ed. 2012, 51, 5188) a Pd catalyst to couple 21 with 22 to give 23 with high diastereocontrol. Yoshiji Takemoto of Kyoto University cyclized (Angew. Chem. Int. Ed. 2012, 51, 2763) the chloroformate 24 directly to the oxindole 25.


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