102 research outputs found
Synthesis of tri-aryl ketone amine isomers and their cure with epoxy resins
No full textIsomeric tri-aryl ketone amines, 1,3-bis(3-aminobenzoyl)benzene (133 BABB), 1,3-bis(4-aminobenzoyl)benzene (134 BABB), and 1,4-bis(4-aminobenzoyl)benzene (144 BABB) are synthesized and cured with diglycidyl ether of bisphenol A and diglycidyl ether of bisphenol F in this work. Differential scanning calorimetry and near-infrared spectroscopy reveal higher rate constants and enhanced secondary amine conversion with increasing para substitution attributed to resonance effects and the electron withdrawing nature of the carbonyl linkages. Glass transition temperatures increase from 133 BABB to 134 BABB, but decrease modestly for the 144 BABB hardener. With increasing para substitution, the flexural modulus and strength both decrease while the strain to failure increases but all BABB amines displaying higher mechanical properties than the corresponding 4,4-diaminodiphenyl sulfone (44 DDS) networks. The thermal stability of the BABB networks is found to be modestly lower than 44 DDS, but char yields are significantly higher. Changes in thermal and mechanical properties are described in terms of molecular structure and equilibrium packing density.Novel Aerospace Material
Modification of Cortical Evoked Potential During Induced and Natural Behavioural States in the Hooded Rat
No full textTitle: Modification of Cortical Evoked Potential During Induced and Natural Behavioural States in the Hooded Rat, Author: Thomas L. Babb, Location: ThodeCortical potentials evoked by flashes or clicks were studied in the CER situation and found to increase by over 200% when these evoking stimuli served as conditional stimuli (classical conditioning), when neutral flashes were paired with click CS's (compound conditioning), and when flashes followed painful shock (backward conditioning) which sometimes suppressed bar pressing. Similar increases were evoked in other animals during high voltage slow electroencephalographic sleep or drowsiness. Only cortical components (not afferent activity) of the evoked response were found to increase with these different behavioral conditions, but the changes are not attributed to conditioning per se or dependent on immobility.ThesisMaster of Arts (MA
Reticular Control of Cortical Unit Activity in the Cat
No full textTitle: Reticular Control of Cortical Unit Activity in the Cat, Author: Thomas L. Babb, Location: ThodeExtracellular action potentials were recorded from the suprasylvian gyrus of the cat and compared with slow potentials derived from the overlaying cortical surface in experiments designed to investigate the influences of potine reticular formation on these fast and slow voltage transients. When pontine afferents were blocked by mid-pontine lesion or reversible cooling, the number of recordedable spontaneous and injury discharges was reduced as compared to that recorded from preparations with lower pontine, post-trigeminal, lesions. Bilateral gasserectomies in post-trigeminal preparations did not reduce unit activity. However, the mean and median average firing rates and the patterns of spontaneously-active cells were not demonstrably different fro high and low pontine preparations. Either EEG synchrony or desynchronization was found to co-0exist with either high or low levels of unit activity.ThesisDoctor of Philosophy (PhD
Increasing Cervical Cancer Screening in a Federally Qualified Health Center
No full textabstract: Routine cervical cancer screening has significantly decreased the mortality rate of cervical cancer. Today, cervical cancer predominantly affects those who are rarely or never screened. Government programs are in place to provide cervical cancer screening at little to no cost, yet screening rates remain suboptimal. This project evaluated an evidence-based intervention to increase cervical cancer screening among underserved women in a federally qualified health center (FQHC). Female patients ages 21 to 65 years without history of hysterectomy (n=1,710) were sent reminders to their phones through the electronic health record (EHR). The message included educational material about the screening process and an announcement regarding government aid for free or reduced cost screening. The number of patients who made an appointment after receiving the message was assessed two months later. In total, 156 responses were collected, and 28 patients made an appointment for screening. The most frequently observed category of Ethnicity was Hispanic/Latina (n = 24, 86%). The most frequently observed category of Insurance was Title X (n = 13, 46%). The observations for Age had an average of 41.04 (SD = 9.93). Using an EHR communication function to send motivational reminders has shown some promise for increasing cervical cancer screening, thereby reducing cervical cancer mortality among the underserved
Phyllodoce caerulea (Mountain Heath) : Mountain Heath
No full textClass: Dicotyledoneae
Family: Ericaceae
Genus: Phyllodoce
Species: caerule
A long way from home : the West Gulf Blockading Squadron and Union naval logistics in the Civil War
No full textRecommended from our members
Selected Poems, with a Comparison of Religious Sonnets of Donne and Hopkins
No full textThis thesis presents original poems by the author, as well as a comparison of the religious sonnets by John Donne and Gerard Manley Hopkins
An assessment of premarital counseling practices of pastors of the Wesleyan Church
No full textThis study investigated the premarital counseling practices of pastors of the Wesleyan Church in the United States. Its purpose was to ascertain the practices of pastors regarding the provision of premarital counseling services to members of the church they serve and to draw implications from the findings regarding the need to modify and/or develop premarital counseling services within the Wesleyan Church.Two instruments were constructed by the writer, the Wesleyan Church Pastor's Descriptive Data Profile (WCPDDP) rand the Pastoral Pre-Marital Counseling Inventory (PPMCI), to elicit data used to address three research questions. They focused on the extent to which premarital counseling programs of study respondents paralleled typical premarital counseling programs outside the Wesleyan Church in terms of content, practices, and policy. Study respondents were 538 ordained pastors randomly selected from names provided by the Wesleyan Church International Center in Indianapolis, Indiana. Of this number, 386 (79.8%) returned by mail usable sets of study materials. Respondents had a church assignment in September 1990. They were essentially male (98.2%), married (98.2%), over age 35 (79.2%), and provided premarital counseling to at least four couples each year for the past ten years.Study findings indicated that 15 of 21 topics, considered as part of a typical premarital counseling program, were included by more than one-half of the pastors in the study sample. Just six of these topics were included by more than 80% of the respondents in marriage preparation programs. Only 40 respondents (10.6%) agreed that the ordination requirements in the Wesleyan Church provide adequate training for effective premarital counseling.Study findings support the conclusion that the emphasis and priorities given to both the content and practices of premarital counseling vary substantially among Wesleyan pastors. The implication is that the Church should provide more structure with regard to the topics included in marriage preparation as well as the practices of premarital counseling. The finding that most pastors believe their training has not adequately prepared them for premarital counseling seems to support the conclusion that the Church must take steps to modify college programs in pastoral preparation for the ministry to include more attention to premarital counseling.Source: Dissertation Abstracts International, Volume: 52-10, Section: A, page: 3527.Ph.D. American University 1991.Englis
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