Digital Commons Network^™

Cultural Values And Happiness, Timothy B. Smith

Faculty Publications

Csikszentmihalyi (1999) has reminded us that social scientists cannot shrink from challenging the validity of our most cherished values, including the fundamental nature of happiness. He cites research affirming that material wealth does not correlate with happiness and then presents data correlating happiness with the experience of flow. However, in making this leap Csikszentmihalyi confuses correlation with causation. Because losing oneself in a project, relationship, or dream is followed by a very positive condition does not mean that the experience itself caused happiness. It is equally likely that losing one self is the causative factor. In looking at his data …

Modeling High Pressure Char Oxidation Using Langmuir Kinetics With An Effectiveness Factor, Jianhui Hong, William C. Hecker, Thomas H. Fletcher

Faculty Publications

The global nth order rate equation has been criticized for lack of theoretical basis and has been shown to be inadequate for modeling char oxidation rates as a function of total gas pressure. The simple Langmuir rate equation is believed to have more potential for modeling high pressure char oxidation. The intrinsic Langmuir rate equation is applied to graphite flake oxidation data and agrees well with reaction rates at three temperatures over the entire range of oxygen pressure (1–64 atm). It also explains the change of reaction order with temperature. In this work, the intrinsic Langmuir rate equation is combined …

The Use Of Two Mixture Fractions To Treat Coal Combustion Products In Turbulent Pulverized-Coal Flames, Daniel V. Flores, Thomas H. Fletcher

Faculty Publications

Previous coal combustion models using assumed-shape PDF's to treat turbulence-chemistry interactions have used only one progress variable to treat products from coal reactions. This assumes that the products of all coal reactions have the same composition. However. the composition of the combustion products of coal particles is known to vary with burnout, especially between devclatilization and char oxidation. In this work, two progress variables were implemented which distinguish between the products of devolatilization and those of char oxidation. This new approach requires as input the specified volatile content and elemental release during devolatilization. The values for these parameters were estimated …

Improving The Accuracy Of Predicting Effectiveness Factors For Mth Order And Langmuir Rate Equations In Spherical Coordinates, Jianhui Hong, William C. Hecker, Thomas H. Fletcher

Faculty Publications

Char oxidation is often modeled using an mth order intrinsic reaction rate in conjunction with an effectiveness factor to account for intraparticle diffusion of gas species. This approach involves the use of a general modulus (M_T) and using the first-order curve of effectiveness factor vs M_T. This method was originally referred to as the general asymptotic solution. It has been suggested that a simple Langmuir rate equation is more suitable for modeling the effects of pressure on char reactivity. Therefore, several methods of developing general moduli for the Langmuir rate expression are shown. The general asymptotic …

Leveraging Analysis Operators In Incremental Generation, Deryle W. Lonsdale

Faculty Publications

This paper discusses the integration of an operator-based generation component with a similarly-designed natural-language comprehension system. It begins by sketching the cognitive theory and modeling system that frame both systems. A brief summary of the comprehension system and its characteristics follows, including the relevant operators. The generation system with its own operators and processing stages is then introduced. The degree to which these two systems exhibit shared functionality is then explored, and ongoing work is mentioned.

Personal Values And Work Satisfaction Of Registered Nurses Working In Hospitals, Marie M. Prothero, Elaine S. Marshall, Donna M. Fosbinder, Leland J. Hendrix

Faculty Publications

Personal values are increasingly recognized as important factors in work environments, including health care systems (Cameron & Whetten, 1995; Covey, Merrill, & Merrill, 1995; Fagermoen, 1997). The personal values of nursing students have been explored (Eddy, Elfrink, Weis, & Schank, 1994; Sivberg & Petersson, 1997) as have those of nurses, in the context of work design (Koerner, 1993 ). Factors of nurses' work satisfaction have also been studied extensively (Avallone & Gibbon, 1998; Brown, Naughton, & Nolan, 1998; Johnston,1997; Kangas, Kee, & McKee-Waddle,1999; Seymour & Buscherhof,1990). However, little is known about the personal values of nurses as they relate to …

4q466, Text Mentioning ‘Congregation Of The Lord’, Dana M. Pike

Faculty Publications

THIS small fragment (olim 4Q576) is light brown in colour, and the ink is well preserved. It measures 4 cm by 2.5 cm. The writing is legible and preserves portions of five lines of text. The distance between each of lines 1-3 is 5 mm, while lines 3-5 are spaced 3 mm apart. The letters are 2-3 mm in height. The orthography is full, as evidenced by the use of waw as a mater lectionis three times ('ili'?~ once and '?i:, twice).

‘A Light To Jacob’ And Other Interesting Finds In 4qmiscellaneous, Dana M. Pike, Andrew C. Skinner

Faculty Publications

One purpose of our paper is to present a final pre-publication report on our efforts to publish the approximately 2900 fragments from Qumran Cave 4 that comprise our allotment, designated "4QMiscellaneous and Unidentified." These fragments are found on 40 PAM plates, 43.660-43.686, and 43.688-43.701. We have examined all of the plates in the Rockefeller Museum that contain our fragments, have compared them with the PAM photographic plates received from the Israel Antiquities Authority, and are now working to finish preparing our transcriptions of and notes on these fragments. We will submit our work for publication in DJD XXXIII in 1999.

An Investigation Of The Effects Of Subthalamic Nucleus Stimulation On Acoustic Measures Of Voice, Christopher Dromey, Rajeev Kumar, Anthony E. Lang, Andres M. Lozano

Faculty Publications

Summary: Seven patients with Parkinson’s disease were implanted with deep brain stimulators to provide chronic electrical stimulation to the subthalamic nucleus bilaterally. Acoustic recordings and neurologic assessments were undertaken before surgery in the medication-off and medication-on conditions and after surgery with and without electrical stimulation in the medication off and medication-on conditions. The data showed significant improvements in limb motor performance in response to medication before surgery and when the subthalamic nucleus was stimulated after surgery. Six months after surgery, there were small but statistically significant increases in sound pressure level and fundamental frequency variability in response to stimulation in …

The Treatment Of Essential Voice Tremor With Botulinum Toxin A: A Longitudinal Case Report, Christopher Dromey, Paul Warrick, Jonathan Irish, Lisa Durkin

Faculty Publications

Summary: The purpose of this study was to evaluate the effects of bilateral botulinum toxin injection into the thyroarytenoid (TA) muscles of a patient with essential voice tremor. Acoustic and aerodynamic data were collected weekly over a 16-week period. Flexible nasolaryngoscopy was performed prior to injection and 2, 6, 10, and 16 weeks post injection. Perceptual analyses of the acoustic and nasolaryngoscopic data were performed. A reduction in frequency tremor and, to a lesser extent, amplitude tremor was observed during the 1-10 week period. Estimated laryngeal resistance decreased after injection and was accompanied in perceptual measures by a reduction in …

Proclamation-Based Principles Of Parenting And Supportive Scholarship, Craig H. Hart, Lloyd D. Newell, Lisa L. Sine

Faculty Publications

How parents view the nature of a child and their own role as parents has great influence over the life of that child. Many perspectives about the nature of children have arisen in the course of Western Civilization that have shaped childrearing practices for centuries, including the increasingly accepted scholarly view that parents matter relatively little in children’s lives. (2) This chapter emphasizes inspired, eternal principles that are supported by empirical and conceptual scholarship, which suggests that optimal parenting does indeed matter in children’s lives.

Threatened Fishes Of The World: Chasmistes Liorus Jordan, 1878 (Catostomidae), Mike Whitney, Mark C. Belk

Faculty Publications

Common name: June sucker.

Caregivers Locus Of Control For Child Improvement, Timothy B. Smith

Faculty Publications

A potentially important variable that has received little attention in the disabilities literature is the caregiver's locus of control beliefs for child improvement as they relate to treatment compliance and actual child improvement. To evaluate the construct's utility in a practice setting, 131 caregiver-child dyads were assessed twice, twelve months apart. Children were an average of approximately four years old at the first assessment, and all of them had mild to severe developmental disabilities. Aspects of caregiver compliance to treatment were rated, and measures of child development status, family functioning, and caregiver locus of control were administered. Results indicated that …

Creation Of An Ultracold Neutral Plasma, Scott D. Bergeson, T. C. Killian, S. Kulin, L. A. Orozco, C. Orzel, S. L. Rolston

Faculty Publications

We report the creation of an ultracold neutral plasma by photoionization of laser-cooled xenon atoms. The charge carrier density is as high as 2×10^9 cm^-3, and the temperatures of electrons and ions are as low as 100 mK and 10 uK, respectively. Plasma behavior is evident in the trapping of electrons by the positive ion cloud when the Debye screening length becomes smaller than the size of the sample. We produce plasmas with parameters such that both electrons and ions are strongly coupled.

Class Ethos And The Politics Of Inquiry: What The Barroom Can Teach Us About The Classroom, Julie Lindquist

Faculty Publications

No abstract provided.

Majority Rule Or Minority Will: Adherence To Precedent On The Us Supreme Court By Harold J. Spaeth And Jeffrey A. Segal, Donald R. Songer

Faculty Publications

No abstract provided.

Dual Function Euv Multilayer Mirrors For The Image Mission, David D. Allred, R. Steven Turley, Matthew B. Squires

Faculty Publications

We have developed a new family of EUV multilayer mirror coatings using uranium. Using this approach we have coated a set of six mirrors for the EUV Imager, a component of the IMAGE mission. This mission is a Medium Explorer (MIDEX) program, which is scheduled for launch early in 2000. The EUV Imager will study the distribution of He+ in the Earth's plasmasphere by detecting its resonantly scattered emission at 30.4 nm (41 eV) and will produce images of the structure and dynamics of the cold plasma on a global scale. There is, however, a bright at 58.4 nm (21 …

Simulation And Density Functional Study Of A Simple Membrane Separating Two Restricted Primitive Model Electrolytes, Richard L. Rowley, Dezso Boda, Douglas Henderson, Stefan Sokolowski

Faculty Publications

A simple membrane, supporting charge densities on its inner and outer surfaces, is considered. In addition to the electrostatic potential, the membrane interacts with the surrounding fluid by a short range van der Waals-like potential. The fluid beyond the outer surface is a three-component restricted primitive electrolyte consisting of two cations and one anion. The membrane is impermeable to one of the cations so that the fluid in the membrane and beyond the inner surface is a two-component restricted primitive electrolyte. We use Monte Carlo simulations and density functional theory to study the density profiles of the electrolyte and the …

Selective Excitation And Thermal Quenching Of The Yellow Luminescence Of Gan, John S. Colton, P. Y. Yu, K. L. Teo, E. R. Weber, P. Perlin, I. Grzegory, K. Uchida

Faculty Publications

We report the observation of narrower structures in the yellow luminescence of bulk and thin-film n-type GaN, using the technique of selective excitation. These fine structures exhibit thermal quenching associated with an activated behavior. We attribute these fine structures to phonons and electronic excitations of a shallow donor-deep acceptor complex, and determine its activation energy for delocalization. Our results suggest that in addition to distant donor-acceptor pairs, the yellow luminescence can also involve emission complexes of shallow donors and deep acceptors.

Tracking Of Physical Activity, Physical Inactivity, And Health-Related Physical Fitness In Rural Youth, Russell R. Pate, Stewart G. Trost, Marsha Dowda, Alise E. Ott, Dianne S. Ward, Ruth P. Saunders, Gwen A. Felton

Faculty Publications

This study examined the tracking of selected measures of physical activity, inactivity, and fitness in a cohort of rural youth. Students (N=181, 54.7% female, 63.5% African American) completed test batteries during their fifth- (age=10.7±0.7 years), sixth-, and seventh-grade years. The Previous Day Physical Activity Recall (PDPAR) was used to assess 30-min blocks of vigorous physical activity (VPA), moderate-to-vigorous physical activity (MVPA), TV watching and other sedentary activities, and estimated energy expenditure (EE). Fitness measures included the PWC 170 cycle ergometer test, strength tests, triceps skinfold thickness, and BMI. Intraclass correlation coefficients (ICCs) for VPA, MVPA, and after-school EE …

Accuracy Of Scatterometer-Derived Winds Using The Cramer-Rao Bound, David G. Long, Travis E. Oliphant

Faculty Publications

A wind scatterometer makes measurements of the normalized radar-backscatter coefficient O of the ocean surface. To retrieve the wind, a geophysical model function (GMF), which relates O to the near-surface wind, is used. The wind vector can be estimated using maximum-likelihood techniques from several O measurements made at different azimuth angles. The probability density of the measured O is assumed to be Gaussian with a variance that depends on the true O and therefore, depends on the wind through the GMF. With this model for wind estimation, the Cramer-Rao (C-R) bound is derived for wind estimation, and its implications for …

Annotated Bibliography Of Research In The Teaching Of English, Deborah Brown, Wayne Martino, Gert Rijlaarsdam, Anne D'Antonio Stinson, Melissa E. Whiting

Faculty Publications

Twice a year in die May and November issues, RTE publishes a selected bibliography of recent research in the teaching of English. Most of the studies appeared during the six-month period preceding the compilation of the bibliography (January through June, 1999, for the present bibliography), but some studies that appeared earlier are occasionally included. The listing is selective; we make no attempt to include all research and research-related articles that appeared in the period tinder review Comments on the bibliography and suggestions about items for inclusion may be directed to the bibliography editors. We encourage you to send your suggestions …

Validity Of The Previous Day Physical Activity Recall (Pdpar) In Fifth-Grade Children, Stewart G. Trost, Dianne S. Ward, Ben Mcgraw, Russell R. Pate

Faculty Publications

This study evaluated the validity of the Previous Day Physical Activity Recall (PDPAR) self-report instrument in quantifying after-school physical activity behavior in fifth-grade children. Thirty-eight fifth-grade students (mean age, 10.8 ± 0.1; 52.6%; female; 26.3% African American) from two urban elementary schools completed the PDPAR after wearing a CSA WAM 7164 accelerometer for a day. The mean within-subject correlation between self-reported MET level and total counts for each 30-min block was 0.57 (95% C.I., 0.51-0.62). Self-reported mean MET level during the after-school period and the number of 30-min blocks with activity rated at > 6 METs were significantly correlated with the …

America's Uneasy Relationship With The Working Poor, A. Mechele Dickerson

Faculty Publications

No abstract provided.

Intersecting Chains In Finite Vector Spaces, Eva Czabarka

Faculty Publications

We prove an Erdős–Ko–Rado-type theorem for intersecting k-chains of subspaces of a finite vector space. This is the q-generalization of earlier results of Erdős, Seress and Székely for intersecting k-chains of subsets of an underlying set. The proof hinges on the author's proper generalization of the shift technique from extremal set theory to finite vector spaces, which uses a linear map to define the generalized shift operation. The theorem is the following.

For c = 0, 1, consider k-chains of subspaces of an n-dimensional vector space over GF(q), such that the smallest subspace in any chain has dimension at least …

Piezoelectric Doping In Alingan/Gan Heterostructures, M. Asif Khan, J. W. Yang, Grigory Simin, R. Gaska, M. S. Shur, A. D. Bykovski

Faculty Publications

We report on the piezoelectricdoping and two-dimensional (2D) electron mobility in AlInGaN/GaN heterostructures grown on 6H–SiC substrates. The contribution of piezoelectricdoping to the sheet electron density was determined using an In-controlled built-in strain-modulation technique. Our results demonstrate that in strained AlGaN/GaN heterostructures, the piezoelectric field generates at least 50% of the 2D electrons. The strain modulation changes the potential distribution at the heterointerface, which, in turn, strongly affects the 2D electron mobility, especially at cryogenic temperatures. The obtained results demonstrate the potential of strain engineering and piezoelectricdoping for GaN-based electronics.

Low-Frequency Noise In N-Gan With High Electron Mobility, M. E. Levinshtein, S. L. Rumyantsev, D. C. Look, R. J. Molnar, M. Asif Khan, Grigory Simin, V. Adivarahan, M. S. Shur

Faculty Publications

We report on the results of measurements of low frequency noise in n-type gallium nitride (GaN) grown on sapphire with 300 K electron mobility of 790 cm²/V s. The noise spectra have the form of 1/f noise with a Hooge parameter α of approximately 5×10⁻². This value of α is two orders of magnitude smaller than that observed before in n-GaN. The obtained results show that the level of flicker noise in GaN, just like that in GaAs and Si, strongly depends on the structural perfection of the material (the amplitude of the 1/f …

Phonon And Elastic Instabilities In Moc And Mon, Gus L. W. Hart, Barry M. Klein

Faculty Publications

We present several results related to the instability of MoC and MoN in the B1 (sodium chloride) structure. These compounds were proposed as potential superconductors with moderately high transition temperatures. We show that the elastic instability in B1-structure MoN, demonstrated several years ago, persists at elevated pressures, thus offering little hope of stabilizing this material without chemical doping. For MoC, another material for which stoichiometric fabrication in the B1 structure has not proven possible, we find that all of the cubic elastic constants are positive, indicating elastic stability. Instead, we find X-point phonon instabilities in MoC (and in MoN as …

High Crimes And Misdemeanors: Defining The Constitutional Limits On Presidential Impeachment, Frank O. Bowman Iii, Stephen L. Sepinuck

Faculty Publications

This Article had its genesis in a statement by the authors submitted to the House Judiciary Committee during its proceedings regarding the impeachment of President Clinton. This final much expanded version appears after the conclusion of the Clinton impeachment proceedings in the Senate, and it is certainly informed by the course those proceedings took. Strictly speaking, however, this is not an article “about” the Clinton impeachment. Although this Article draws some conclusions from the treatment by the House and Senate of the fundamental allegations against President Clinton, it does not address in detail the specific facts underlying those allegations. The …

The Premature Belatedness Of Victorianism's Boyhood: Clough And The Rugby Magazine, 1835-1837, Patrick G. Scott

Faculty Publications

Explores the attitudes and pressures on early Victorian teenagers through an examination of contributions by the poet Arthur Hugh Clough and other students at Rugby School to a short-lived quarterly, the Rugby Magazine (1835-1837). Originally presented at the Victorians Institute conference, Richmond, VA, 1999.