38,762 research outputs found
A Tripartite Post-Recession Rebalancing
No full textIn this latest Advance & Rutgers Report, entitled “A Tripartite Post-Recession Rebalancing,” Dean James W. Hughes and Professor Joseph J. Seneca deliver an incisive assessment of the current market conditions and obstacles in the path of our economic recovery. They offer a statistical cautionary tale that the private and public sector need to hear and acknowledge in order for the economy to make continued progress.This report was published as Issue Paper Number 7, November 2011, in Advance & Rutgers Report
Experimental Study of Impact-Damage Detection in Composite Laminates using a Cross-Modulation Vibro-Acoustic Technique
No full textThe paper demonstrates the application of cross-modulation vibro-acoustic technique for impact-damage detection in composite laminates. A composite plate is monitored for damage resulting from a low-velocity impact. The plate is excited simultaneously with two harmonic signals: a slow amplitude-modulated vibration pumping wave and a constant amplitude-probing wave. The frequency of both the excitation signals coincides with the resonances of the plate. An electromagnetic shaker is used to introduce the pumping wave to the plate. Two surface-bonded, low-profile piezoceramic transducers are used for probing-wave excitation and measurement. The wave modulation is transferred from the pumping wave to the probing wave in the presence of impact damage. This effect is exhibited in a power spectrum of the probing wave by a pattern of sidebands around the carrier harmonic. The results show that the amplitude of the sidebands is related to the severity of damage. The study also investigates also the effect of boundary conditions on the result
Impact damage detection in light composite sandwich panels
No full textThe paper presents a comparative study on impact damage detection in light composite sandwich panels. Three different nondestructive testing methods were used to characterize damage in a test specimen that resulted from a controlled low velocity impact event. The analyzed test methods include the ultrasonic c-scan, vibrothermography and shearography. All considered techniques were positively verified for detecting damage in a sandwich panel. The paper gives details about the experimental procedures and equipment required to perform the tests
The Receding Metropolitan Perimeter: A New Postsuburban Demographic Normal
No full textThe report traces population changes for two time periods: 1950 to 1980, reflecting the nation’s unprecedented postwar suburbanization, and 2010 to 2013, for the recovery period to date from aftershocks of the Great 2007-2009 Recession. The decades between the two time periods analyzed – the 1980s, 1990s, and 2000s – are also examined for the influence of overall regional growth, age-structure variations and immigration levels on population change.
Twenty-seven of the suburban-ring counties in the four states witnessed explosive growth in the 30-year period from 1950 to 1980, gaining more than 5.3 million residents, and nearly doubling their population. By contrast, the regional core of eight urban counties in New York and New Jersey contracted sharply during the same period, losing nearly a million people.
Then, during the 2010–2013 period, the trend reversed: the regional core grew at a rate more than double that of the suburban ring, adding 85,284 persons per year. The regional core accounted for most of the total population growth, a phenomenon unparalleled since World War II. All of the suburban counties with population losses were on the metropolitan outer ring with the exception of Monmouth County, which suffered impacts from Superstorm Sandy.
The authors insistently caution that this shift in population growth is not necessarily a long-term change since the latest time period is so limited. However, the data suggest a change of the crest of the wave nature indicating that the multidecade pattern of further growth on the perimeter of the region out has shifted.
The report also discusses the influence of young adults’ locational preferences for urban lifestyle and workplace choices post-2000 as one contributing factor to these shifting population patterns
Solar Power in the Garden State
No full textThis special issue on energy and solar power in New Jersey was made possible because of the extensive portfolio of research centers and institutes at the Edward J. Bloustein School of Planning and Public Policy. Dr. Frank A. Felder, an Associate Research Professor, has been director of the School’s Center for Energy, Economic & Environmental Policy (CEEEP) since 2006. Frank is a nuclear engineer with a PhD degree from MIT, and he, along with his CEEEP colleague, Shankar N. Chandramowli, coauthored the main article in this issue of the Advance & Rutgers Report. CEEEP has worked extensively with the New Jersey Board of Public Utilities on projects, including New Jersey’s current Energy Master Plan.Shining Brightly: Bloustein's Centers of Excellence / by James W. Hughes and Joseph S. Seneca -- Solar Power in the Garden States / by Shankar N. Chandramowli and Frank A. Felder.Guest contributors include Shankar N. Chandramowli and Frank A. Felder, PhD, Director—Center for Energy, Economic and Environmental Policy at the Edward J. Bloustein School of Planning and Public PolicyReports published as Issue Paper Number 5, May 2011, in Advance & Rutgers Report, Special Issue
Author Correction: Establishment and equilibrium levels of deleterious mutations in large populations (Scientific Reports, (2019), 9, 1, (10384), 10.1038/s41598-019-46803-7)
No full textThe original version of this Article contained errors. Affiliations 1 and 2 were reversed. Secondly, Affiliation 7 was incorrectly given as ‘Institute for Cellular and Molecular Medicine, Department of Immunology, and SAMRC Extramural Unit for Stem Cell Research and Therapy, Faculty of Health Sciences, University of Pretoria, Pretoria, 0084, South Africa’. Thirdly, an affiliation was omitted for the author Michael S. Pepper, which is now listed as Affiliation 8. Fourthly, Affiliation 1 was omitted for the author Johan W. Viljoen. Finally, Augustinus J. van Zyl was incorrectly affiliated with ‘Institute for Maternal and Child Health, IRCCS ‘Burlo Garofolo’, Trieste, Italy.’ The correct author affiliations are listed below: Affiliation 1: Department of Electrical, Electronic and Computer Engineering, EBIT, University of Pretoria, Pretoria 0028, South Africa Johan W. Viljoen and J. Pieter de Villiers Affiliation 2: Development, Research and Technology Department, Hensoldt Optronics, Centu..
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A Theory of Skilled Memory
No full textA theory of mnemonic expertise is outlined along
with findings from initial tests. The expertise belongs
to a nonnal adult ( D D ) w h o developed a digit-span of
104 through extended practice. The theory describes
h o w mechanisms consistent with the principles of
skilled m e m o r y (Chase & Ericsson, 1982; Ericsson
& Staszewski, 1989) and identified by analyses of
DD's behavior, support his skill. Implemented as a
computational model, the theory assumes that distinct
knowledge structures mediate both DD's encoding of
short segments of trial lists as elaborate, well-
structured L T M representations and their retrieval in
several recall tasks. Current testing investigates the
model's ability to generate contextual codes, a class of
patterned m e m o r y elaborations experimentally shown
to improve DD's serial recall (Staszewski, 1990).
Given the same lists D D received, it successfully
generates over 8 0 % of the contextual codes in his
verbal reports. Because successful simulation of
contextual codes entails accurate simulation of
operations performed by first-order coding
mechanisms, results support theoretical assumptions
about the knowledge underlying DD's coding
operations. The model's overly powerful coding
suggests that more stringent architectural constraint
must be incorporated to rigorouslydemonstrate h o w
skilled m e m o r y can increase working m e m o r y
capacity in a normal cognitive architecture and
support expertise
Mr. Melvin J. Collier, RWWL AUC, June 2011
No full textThis video is a conversation with Mr. Melvin J. Collier. Mr. Collier talks about his book, "From Mississippi to Africa: A Journey of Discovery". Daniel Le, AUC Woodruff Library, is the interviewer
Damage imaging in composites using nonlinear vibro‐acoustic wave modulations
No full textThe paper deals with the application of nonlinear vibro‐acoustic modulation technique for detection and localization of impact damage in a laminated composite plate. An imaging procedure—based on the nonlinear vibro‐acoustic modulation sidebands—is proposed. The procedure relies on simultaneous low‐frequency modal and high‐frequency ultrasonic excitations. Laser scanning vibrometry is used to analyze the amplitude of modulation sidebands in vibro‐acoustic responses. This analysis is performed for different positions on monitored structure to reveal the location and shape of damage. The method is illustrated using a simple example of impact damage detection in a composite plate. The experimental damage detection results are compared with the results obtained from the previously used approach on the basis of higher harmonic generation. The proposed method demonstrates better ability to locate damage in these comparative tests without the need to increase the measurement bandwidth to the higher harmonics regime. The work shows that the local defect resonance analysis can improve damage detection results of both compared approaches
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