String Sinfonia, June 3, 2019, Program Notes

Videos of Mika Armaly’s two recitals are available at the bottom of this page. This document includes the video recording of and the program notes for Mika Armaly\u27s graduate recital and the final String Sinfonia concert of Spring Quarter 2019 held on June 3rd. The recital included the following works and corresponding program notes: Adagio and Fugue in C minor, K. 546 by W. A. Mozart Suite for String Orchestra by John Rutter Rumanian Folk Dances by Béla Bartók, arranged by Arthur Willner Concerto in C Major, Hob. VIIb:1 by Franz Joseph Hayd

Why an attack on the Supreme Court by Donald Trump could hurt its reputation in the eyes of his supporters

During the 2016 election campaign and the early stages of his presidency, Donald Trump made repeated attacks on the integrity of federal judges. If his belligerence were to turn to the US Supreme Court, would the trust that Americans feel in that institution protect its reputation? In new research which examines how people's views of the Court are affected by partisan attacks and praise, Miles T. Armaly finds that, in the face of such attacks, the reputation of the Court could be undermined among those who already support Donald Trump. People’s feelings about a particular politician who makes negative statements – not about the Court itself – he writes, are the main determinant of how effective these statements are

Continuum Absorption Coefficient of Atoms and Ions

The rate of heat transfer to the heat shield of a Jupiter probe has been estimated to be one order of magnitude higher than any previously experienced in an outer space exploration program. More than one-third of this heat load is due to an emission of continuum radiation from atoms and ions. The existing computer code for calculating the continuum contribution to the total load utilizes a modified version of Biberman's approximate method. The continuum radiation absorption cross sections of a C - H - O - N ablation system were examined in detail. The present computer code was evaluated and updated by being compared with available exact and approximate calculations and correlations of experimental data. A detailed calculation procedure, which can be applied to other atomic species, is presented. The approximate correlations can be made to agree with the available exact and experimental data

When the Senate plays politics with Supreme Court vacancies this hurts the public’s perceptions of the Court

The recent US Senate confirmation of Judge Ketanji Brown Jackson for the Supreme Court has shown how politicized such hearings have become. But how do these more contentious hearings influence how the American public thinks about the Supreme Court itself? In new survey research, Miles T. Armaly and Elizabeth A. Lane examine reactions to the US Senate’s approach to filling Justice Ruth Bader Ginsburg’s Supreme Court seat. They find that respondents who were told about the politicization of a past vacancy were less likely to express support for the Supreme Court and to favor reforms which would reduce its power

Authoritarian populist Americans who feel a sense of victimhood and white identity are most likely to support political violence

The capitol insurrection of January 6, 2021 brought the rise of political violence in America into sharp focus. But who supports the use of violence to achieve their political goals? In new survey research, Miles T. Armaly and Adam M. Enders find that feelings of victimhood, authoritarian and populist sentiments and white identity have the strongest link to support for political violence. They also find that support for political violence is not closely linked to support for a political party, nor is it widespread, with only 13 percent of respondents supporting it

Heat Transfer From An Oscillating Horizontal Wire

The effect of vibration on heat transfer by natural convection has been investigated experimentally using a thin wire, 0.010 in. in diameter, and air as a convection medium. Horizontal reciprocating motion of varying amplitudes, peak-to-peak values of 0-2.655 in., and frequencies, 0-20 cps, was applied to an electrically heated horizontal wire. The average wire velocity (frequency times total path length traveled per cycle by the wire) was used to correlate and predict the experimental results. © 1971 by ASME

Convection Heat Transfer in Three-Dimensional Turbulent Separated/Reattached Flow

The measurements and the simulation of convective heat transfer in separated flow have been a challenge to researchers for many years. Measurements have been limited to two-dimensional flow and simulations failed to predict accurately turbulent heat transfer in the separated and reattached flow region (prediction are higher than measurements by more than 50%). A coordinated experimental and numerical effort has been initiated under this grant for examining the momentum and thermal transport in three-dimensional separated and reattached flow in an effort to provide new measurements that can be used for benchmarking and for improving the simulation capabilities of 3-D convection in separated/reattached flow regime. High-resolution and non-invasive measurements techniques are developed and employed in this study to quantify the magnitude and the behavior of the three velocity components and the resulting convective heat transfer. In addition, simulation capabilities are developed and employed for improving the simulation of 3-D convective separated/reattached flow. Such basic measurements and simulation capabilities are needed for improving the design and performance evaluation of complex (3-D) heat exchanging equipment. Three-dimensional (3-D) convective air flow adjacent to backward-facing step in rectangular channel is selected for the experimental component of this study. This geometry is simple but it exhibits all the complexities that appear in any other separated/reattached flow, thus making the results generated in this study applicable to any other separated and reattached flow. Boundary conditions, inflow, outflow, and wall thermal treatment in this geometry can be well measured and controlled. The geometry can be constructed with optical access for non-intrusive measurements of the flow and thermal fields. A three-component laser Doppler velocimeter (LDV) is employed to measure simultaneously the three-velocity components and their turbulent fluctuations. Infrared thermography is utilized to measure the wall temperature and that information is used to determine the local convective heat transfer coefficient. FLUENT – CFD code is used as the platform in the simulation effort and User Defined Functions are developed for incorporating advanced turbulence models into this simulation code. Predictions of 3-D turbulent convection in separated flow, using the developed simulation capabilities under this grant, compared well with measured results. Results from the above research can be found in the seventeen refereed journal articles, and thirteen refereed publications and presentations in conference proceedings that have been published by the PI during the this grant period. The research effort is still going on and several publications are being prepared for reporting recent results

Motor Control System for Near-Resonance High-cycle Fatigue Testing

This research project develops a low-cost high-cycle fatigue (HCF) testing system comprised of an AC motor, variable frequency drive (VFD), eccentric cam, and feedback controller. The system acts as a forced harmonic oscillator leveraging mechanical resonance to vibrate a specimen at a frequency required to induce the testing\u27s strain amplitudes. This system depends highly on the material being tested. As such, the controller incorporates material characteristics. A frequency sweep measures the strain amplitude to characterize the specimen. Additionally, other measurements such as acceleration can be used as a proxy control variables for strain. A function converts the control variable to frequency. This function tunes a proportional integral derivative (PID) controller to emphasize stable control. This function, coupled with a tuned PID controller, converts the correction update into a voltage signal that commands a motor speed to reach the desired strain amplitude. Testing showed that a longer feedback loop time of 5 seconds was necessary to adequately control the system since the control variables are oscillatory by nature and need to be averaged over time to estimate accurate updates. Also, specimens with low damping are more subject to transient effects; consequently, rapid updates degrade system performance. Overall, the system tested over 250,000 cycles and various specimens. The main limitation of the system is a maximum strain amplitude limited by the specific specimen resonant peak. However, adjusting the system\u27s fixed displacement enables transferring more force to the specimen, changing the shape of the resonant peak