20 research outputs found
Child Sexual Abuse In the Media: Is Institutional Failure to Blame?
This thesis presents a longitudinal content analysis study of child sexual abuse (CSA) in the United States national news media from 2002 through 2012. It finds that the U.S. national news media have shifted their focus from individual level causes to societal level causes for CSA. This shift has implications for changes in institutional policies and child protection laws throughout the country
Effects of denervation on 3 H-fucose incorporation by odontoblasts in the mouse incisor
The present study was designed to determine the effects of denervation on glycoprotein synthesis in the predentinal matrix of the mouse incisor. The inferior alveolar nerve (IAN), superior cervical ganglion (SCG) or both (IAN+SCG) were unilaterally resected in adult mice with the contralateral side remaining intact as a control. Fourteen days after surgery and 4 h prior to killing, 0.2 mCi of 3 H-fucose was injected intravenously and mandibles were processed for standard histological and autoradiographic techniques. Silver halide grains were counted over the predentin matrix for 2000 ÎĽm per tooth. The results showed that the IAN and SCG resection affected 3 H-fucose incorporation into the predentinal matrix; however, the highest absolute mean grain counts occurred after IAN+SCG resection. SCG resection increased the amount of 3 H-fucose incorporated into the predentinal matrix by 48%, that of IAN by 24% and that of IAN+SCG by 14% as compared to contralateral controls. These data indicate a regulatory role for the nervous system and a possible interaction of neural components in the control of glycoprotein synthesis by odontoblasts in the mouse incisor.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/47677/1/441_2004_Article_BF00216039.pd
Providing Prevention Education About Child Sexual Abuse to Parents: Testing Media Effects on Knowledge, Behavioral Intentions and Outcomes
For over thirty years, efforts have been made by child sexual abuse (CSA) advocates to attract and engage parents in child sexual abuse prevention education programs. This study provided parents with CSA prevention education about how to talk to their children about CSA and assessed their attitudes, subjective norms, perceived behavioral control, and behavioral intentions to perform this behavior utilizing the Theory of Planned Behavior. A follow-up survey was conducted to find out if the parents actually performed the behavior of talking to their children and what they talked to them about. The results were 1) that all of the parents displayed high levels of intentions to talk to their children and that 2) they had a discussion with their children using many of the suggestions and language recommended in the intervention program
Morphological studies of the altered pulps of the New Zealand white rabbit after resection of the inferior alveolar nerve and/or the superior cervical ganglion This research was supported by U.S.P.H.S. Research grant DE-01604 from the National Institute of Dental Research, National Institutes of Health, Bethesda, Md.
This study was carried out to determine the effects of denervation of the pulp organs of teeth, particularly on the odontoblasts and their processes. Therefore, resection of the inferior alveolar, cervical sympathetic, or a combination of both types of nerves supplying the mandibular incisor teeth of New Zealand white rabbits was performed and the results compared to adjacent, unaltered teeth. Neural stains were used to evaluate the presence or absence of nerve elements, while histochemical and titrametric methods were employed to determine the presence, location and concentration of cholinesterase enzymes in these teeth. Dilation of blood vessels was noted after cervical sympathetic resection and larger nerve trunks as well as peripherally located fine fibers were absent in the pulps following inferior alveolar nerve resection. Further, irregular dentin formation and associated small openings in the tips of the teeth were observed after nerve resection. Titrametric analysis indicated a significant decrease in the concentration of cholinesterase in the pulp organ of incisors 15–19 days after resection of either the inferior alveolar nerve or both inferior alveolar and cervical sympathetic nerves. Only a slight decrease in the concentration of cholinesterase was noted after removal of the cervical sympathetic nerve alone. Histochemical results confirmed a decrease in cholinesterase after resection of the inferior alveolar, cervical sympathetic or both nerves. The concentration of the oxidative enzyme, succinic dehydrogenase, however, increased after all three types of nerve resection. This increase was apparent particularly in the odontoblastic cells underlying the predentin.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/49823/1/1091710406_ftp.pd
Personal Papers (MS 80-0002)
Letter from Preston A. Weatherred to I. H. Kempner asking Kempner to attend the Convention of the Southwestern Ice Manufacturers' Association and give an address at the event
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A Comparison of Bus and Town Pupils in Educational Progress
The problem of this thesis is to determine the progress made by a group of bus and town pupils in the second grade and should indicate whether or not riding the school bus is detrimental to the academic achievement, behavior development, and personality development of the individual
Nonreciprocal low-noise acoustoelectric microwave amplifiers with net gain in continuous operation
Over sixty years ago, it was hypothesized that specially designed acoustic
systems that leveraged the acoustoelectric effect between phonons and charge
carriers could revolutionize radio frequency electronic systems by allowing
nonlinear and nonreciprocal functionalities such as gain and isolation to be
achieved in the acoustic domain. Despite six decades of work, no
acoustoelectric amplifier has been produced that can achieve a large net
(terminal) gain at microwave frequencies with low power consumption and noise
figure. Here we demonstrate a novel three-layer acoustoelectric heterostructure
that enables the first-ever continuously operating acoustoelectric amplifier
with terminal gain at gigahertz frequencies. We achieve a terminal gain of
11.25 dB in a 500 micron long device, operating at 1 GHz with a DC power
dissipation of 19.6 mW. We also realize broadband gain from 0.25-3.4 GHz and
nonreciprocal transmission exceeding 44 dB at 1 GHz. Our acoustic noise figure
is 2.8 dB, which is the lowest-ever demonstrated noise figure for an
acoustoelectric amplifier. We discuss generally how to optimize these
acoustoelectric heterostructures and show that it should be immediately
achievable to produce devices with even larger gain in shorter lengths while
simultaneously having lower power consumption and noise figure
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Non-reciprocal acoustoelectric microwave amplifiers with net gain and low noise in continuous operation
Piezoelectric acoustic devices that are integrated with semiconductors can leverage the acoustoelectric effect, allowing functionalities such as gain and isolation to be achieved in the acoustic domain. This could lead to performance improvements and miniaturization of radio-frequency electronic systems. However, acoustoelectric amplifiers that offer a large acoustic gain with low power consumption and noise figure at microwave frequencies in continuous operation have not yet been developed. Here we report non-reciprocal acoustoelectric amplifiers that are based on a three-layer heterostructure consisting of an indium gallium arsenide (In0.53Ga0.47As) semiconducting film, a lithium niobate (LiNbO3) piezoelectric film, and a silicon substrate. The heterostructure can continuously generate 28.0 dB of acoustic gain (4.0 dB net radio-frequency gain) for 1 GHz phonons with an acoustic noise figure of 2.8 dB, while dissipating 40.5 mW of d.c. power. We also create a device with an acoustic gain of 37.0 dB (11.3 dB net gain) at 1 GHz with 19.6 mW of d.c. power dissipation and a non-reciprocal transmission of over 55 dB.DOE | LDRD | Sandia National LaboratoriesOpen access articleThis item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at [email protected]