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Manhattan Area Habitat for Humanity’s Women Build Project – Rebuilding a community one person and one home at a time.
Get PDFIn May 2019, the Morse Family Scholarship aided me in spearheading Manhattans first-ever Women Build – a community-inclusive event designed to garner community support, specifically women, for the restoration of Habitat homes throughout the Manhattan area. Sixty women volunteers gathered over four days across Manhattan to partake in Women Build restoration activities.
This project was mutually beneficial for the Manhattan community and organization due to the lack of women volunteers on Habitats construction sites. This lapse comes from women not feeling comfortable taking on male-dominated roles. Statistically speaking, women only constitute 9% of all construction-related jobs and projects within the United States (Women in the labor force: a databook, 2018). We wanted the Women Build project to help women in our community feel more comfortable with their hands-on abilities by breaking the stigma that women are incapable of occupying spaces in male-dominated roles. The Women Build project was also a great catalyst to disseminate information and raise awareness about Manhattan Area Habitat for Humanity’s mission and purpose within this community
Examining Students’ Epistemological Views of Engineering among First Year Engineering Students
Get PDFThis is a complete research paper. The research interest in engineering epistemology is growing as more engineering education researchers consider that students’ beliefs about the nature of engineering is essential to how they learn, which influences their professional preparation [1]. Epistemology refers to how individuals view the nature of knowledge and knowing in a particular domain, in this case, engineering [2]
Pulse-duration dependence of the double-to-single ionization ratio of Ne by intense 780-nm and 800-nm laser fields: Comparison of simulations with experiments
No full textAccurate ab initio calculations of the ratio of double-to-single ionization of Ne atoms in strong laser fields are difficult due to the many-electron nature of the target. Here, with accurate total cross sections carefully evaluated by using the state-of-the-art many-electron R-matrix theory for both electron-impact ionization and electron-impact excitation of Ne+, we simulate the total double-ionization yields of Ne2+ in strong laser fields at 780 and 800 nm for pulse durations in the range from 7.5 to 200 fs based on the improved quantitative rescattering model. The corresponding single-ionization yields of Ne+ are calculated within the nonadiabatic tunneling model of Perelomov, Popov, and Terent'ev. The ratio of double-to-single ionization of Ne is then obtained from the calculated double- and single-ionization yields. By normalizing the ratio to the one calculated from solving the time-dependent Schrödinger equation for a short few-cycle pulse, we make quantitative comparisons of our results with experimental data to show that our model predicts the experimental findings very well. Finally, we analyze the pulse-duration dependence of the double-to-single ionization ratio
Terahertz-Field-Induced Time Shifts in Atomic Photoemission
Get PDFTime delays for atomic photoemission obtained in streaking or reconstruction of attosecond bursts by interference of two-photon transitions experiments originate from a combination of the quantum mechanical Wigner time and the Coulomb-laser coupling. While the former was investigated intensively theoretically as well as experimentally, the latter attracted less interest in experiments and has mostly been subject to calculations. Here, we present a measurement of the Coulomb-laser coupling-induced time shifts in photoionization of neon at 59.4 eV using a terahertz (THz) streaking field (λ=152 μm). Employing a reaction microscope at the THz beamline of the free-electron laser in Hamburg (FLASH), we have measured relative time shifts of up to 70 fs between the emission of 2p photoelectrons (∼38 eV) and low-energetic (<1 eV) photoelectrons. A comparison with theoretical predictions on Coulomb-laser coupling reveals reasonably good agreement
A coincidence velocity map imaging spectrometer for ions and high-energy electrons to study inner-shell photoionization of gas-phase molecules
Get PDFWe report on the design and performance of a double-sided coincidence velocity map imaging spectrometer optimized for electron-ion and ion-ion coincidence experiments studying inner-shell photoionization of gas-phase molecules with soft X-ray synchrotron radiation. The apparatus employs two microchannel plate detectors equipped with delay-line anodes for coincident, time- and position-resolved detection of photoelectrons and Auger electrons with kinetic energies up to 300 eV on one side of the spectrometer and photoions up to 25 eV per unit charge on the opposite side. We demonstrate its capabilities by measuring valence photoelectrons and ion spectra of neon and nitrogen and by studying channel-resolved photoelectron and Auger spectra along with fragment-ion momentum correlations for chlorine 2p inner-shell ionization of cis- and trans-1,2-dichloroethene
Evidence of Extreme Ultraviolet Superfluorescence in Xenon
Get PDFWe present a comprehensive experimental and theoretical study on superfluorescence in the extreme ultraviolet wavelength regime. Focusing a free-electron laser pulse in a cell filled with Xe gas, the medium is quasi-instantaneously population inverted by 4d-shell ionization on the giant resonance followed by Auger decay. On the timescale of ∼10 ps to ∼100 ps (depending on parameters) a macroscopic polarization builds up in the medium, resulting in superfluorescent emission of several Xe lines in the forward direction. As the number of emitters in the system is increased by either raising the pressure or the pump-pulse energy, the emission yield grows exponentially over four orders of magnitude and reaches saturation. With increasing yield, we observe line broadening, a manifestation of superfluorescence in the spectral domain. Our novel theoretical approach, based on a full quantum treatment of the atomic system and the irradiated field, shows quantitative agreement with the experiment and supports our interpretation
Simple to Complex- Keys to Musical Growth in a High School Band Class: Supplemental Files
No full textIn the spring of 2019, I implemented a study of key signatures with my high school band to create better theoretical musical understanding amongst my students and create opportunities for individual technical improvement. The goal was to have each student create a personal relationship with every key signature, starting with sound and experience first and notation later. We started with 3 keys: one flat, one sharp, and no flats or sharps. Each week we would add one more flat and sharp to our key signatures. To demonstrate their understanding of a key, students would perform a key signature’s major, natural minor, harmonic minor and melodic minor scales without looking at musical notation.
The process of getting my master’s degree has helped me to continue to grow and change as a music educator over time. It has pushed me out of my comfort zone and helped me take risks. I have added more compositional elements to my classes at all levels. I also took a hard look at my literature selections for my concert group. I was empowered to go look for composers outside the mainstream publishers and found great original works for my group to perform that created conversations about musical styles, and the history of concert bands. The creation of my personal music teaching theory helped clarify and solidify my teaching practice grades 5-12. I have a clear purpose to my methodology that is grounded in solid educational theory and experiences beyond my own classroom walls
Effects of medium chain fatty acids to replace zinc oxide and carbadox in nursery pig diets
Get PDFIncreasing regulatory and consumer pressure to reduce antimicrobial use in swine diets is creating a push in finding an alternative product. The objective of this study was to observe the effects of adding dietary amount of zinc oxide, carbodox, and medium chain fatty acids on nursery pig performance. A completely randomized design was conducted with 360 pigs (DNA 200x400; 5.4 ± 0.07 kg; 21 d of age) in a 35-d experiment with 6 pigs/pen and 10 replicate pens/treatment that were fed one of 6 treatments. The treatments were: 1) control; 2) 3,000 ppm ZnO in phase 1 and 1,500 ppm ZnO in phase 2; 3) 50g/ton carbadox; 4) 1% blend of C6:C8:C10; 5) 1% Feed Energy R2 (Feed Energy, Iowa City, IA); 6) 1% FORMI GML (ADDCON, Bitterfeld-Wolfen, Germany). Treatments diets were fed in two phases from weaning to d 19 and a common diet fed as phase 3 from d 20 to 35. With the pen as the experimental unit, data was analyzed using PROC GLIMMIX (SAS version 9.4: Cary, NC). From d 0 to d 19 period, pigs fed ZnO or carbadox had improved (P<0.05) ADG relative to pens with the negative control or R2 diets. While FORMI saw similar results in growth to carbodox with the other MCFA treatments being intermediate. ADFI was higher (P<0.05) for pens fed ZnO relative to the control, C6:C8:C10, or R2 while others were intermediate. Little significance in G:F came from treatment differences (P=0.078). Results of this study suggest ZnO and carbadox are still viable options that producers can use to maximize growth performance in early stages post weaning while FORMI GML can achieve similar growth, whereas other MCFA-based feeds produce variable performance. Therefore, further research must be conducted on other variations of MCFAs to replace ZnO or feed-based antimicrobials
The ability of medium chain fatty acids (MCFA) to replace zinc oxide (ZnO) and common antimicrobials in nursery pig diets
Get PDFThere is increasing consumer pressure to limit the use of antimicrobials and ZnO in nursery pig diets. Studies have shown that medium chain fatty acids (MCFA) may be an effective alternative to replace ZnO and common antimicrobials. In this experiment, 360 weanling pigs (DNA 200 x 400; BW=5.4 0.07 kg) were used in a 35-d experiment to test the effects of ZnO, carbadox and MCFA on nursery pig growth performance. There were 6 pigs per pen (EU) and 10 pens per treatment. Pigs were assigned to pens in a completely randomized design. The dietary treatments were: 1) negative control; 2) carbadox (50g/ton) 3) 3,000 ppm ZnO in phase 1 and 1,500 ppm ZnO in phase 2; 4) 1% C6:C8:C10 (MCFA blend); 5) 1% Feed Energy R2 (Feed Energy Corp, Des Moines, IA); 6) 1% FORMI GML (ADDCON; Bitterfeld-Wolfen, Germany). Individual pig weights and feeder weights were taken weekly to calculate ADG, ADFI, and G:F. Treatments were fed in two phases (d 0 to 7 and d 7 to 19) while a common phase 3 diet was fed (d 20 to 35). Overall, body weights did not differ between treatments (P=0.06). During the treatment phases, pigs fed ZnO and carbadox had increased (P0.05) ADG to pigs fed carbadox. Pigs fed ZnO had higher (P=0.0004) ADFI than those fed the control, C6:C8:C10 and R2 diets while pigs fed the FORMI GML had no significant difference (P0.05) in growth performance between the 6 dietary treatments and therefore, further research on MCFA in nursery pig diets is recommended
Effect of forage type on cecal and fecal fermentation parameters in the horse
Get PDFIt is well documented that the microbiota of the equine hindgut is easily modified by dietary changes. However, the effect of forage type on the cecal environment is relatively unknown. Therefore, the purpose of this study was to evaluate the effects of forage type on fermentation parameters within the hindgut of horses. Six cecally-cannulated horses (527 ± 56.6 kg BW; 12 ± 2.04 yr) were used in a crossover, split-plot design with treatment consisting of ad libitum access to Smooth Bromegrass hay (brome) or alfalfa hay. Subplots consisted of time and location within horse (cecum vs rectum). Horses were acclimated to their respective treatment for 21 d followed by a 24 h collection period. Horses were then switched to their subsequent diet and the protocol repeated. During the collection period, fecal and cecal samples were collected every 3 h and analyzed for pH and volatile fatty acids (VFA). Data were analyzed using the GLIMMIX procedure in SAS 9.4 with fixed effects of forage, location, and time and random effect of horse and period. Fecal pH of alfalfa-fed horses was greater (P0.10) of location on VFA concentration or pH was found with horses consuming brome. Horses consuming alfalfa had greater (P<0.05) VFA concentrations in the cecum compared to the rectum. Alfalfa provided greater VFA for energy utilization