Open Access. Powered by Scholars. Published by Universities.®
Physical Sciences and Mathematics Commons™
Open Access. Powered by Scholars. Published by Universities.®
- Discipline
- Keyword
-
- Acoustics (1)
- Carbon monoxide (1)
- Carbon monoxide insertion (chemistry) (1)
- Carbonyl insertion (1)
- Chemistry (1)
-
- Cosmology (1)
- Gender (1)
- Graphene (1)
- HI (1)
- Holmberg effect (1)
- Hydrogen (1)
- Impatiens pallida (1)
- Inorganic (1)
- Lithography (1)
- Organic chemistry mechanism (1)
- Organometallic compounds (1)
- Pedagogy (1)
- Platinum (1)
- Quantum mechanics (1)
- Ring catalog (1)
- Ring galaxies (1)
- Spiral galaxies (1)
- Throat-singing (1)
- Tilted ring model (1)
- Video analysis (1)
- Vocal tract (1)
- Publication
Articles 1 - 7 of 7
Full-Text Articles in Physical Sciences and Mathematics
The Biomechanics Of Ballistochory In Impatiens Pallida, Lua Del Campo
The Biomechanics Of Ballistochory In Impatiens Pallida, Lua Del Campo
Pomona Senior Theses
This research is an analysis of the explosive seed dispersal of Impatiens pallida fruit. Data was taken using high-speed video and analyzed using LoggerPro video analysis software. From the videos we discerned a qualitative model for dehiscence, a description of how the process unfolds, and from our data we deduced quantitative values for the velocity, momentum, and energy of the system. We were also able to glean a lower bound of Young’s modulus E of the fruit tissue. These results and the tools of analysis that generate them are the foundation for the development of a theoretical model of the …
H I Line Profiles Of Galaxies: Tilted Ring Models, Erica Nelson
H I Line Profiles Of Galaxies: Tilted Ring Models, Erica Nelson
Pomona Senior Theses
Two-dimensional information on the kinematics and spatial distribution of gas in spiral galaxies is encoded in radio observations of their one-dimensional 21-cm neutral hydrogen (HI) line profiles. More than ten thousand HI profiles have been published and are publicly available. In order to explore the parameter space mapped out by the 21-cm neutral hydrogen line pro file, we have modified and run a FORTRAN-based computer simulation code. We have identified 7 control parameters that define the morphology of the modelled galaxy: they describe the neutral hydrogen gas distribution (density and spatial location of the gas), characteristics of its rotation curve, …
A Study Of Interacanding And Companion Galaxies: Implications For Cosmology, Kristen Petrillo
A Study Of Interacanding And Companion Galaxies: Implications For Cosmology, Kristen Petrillo
Pomona Senior Theses
This paper examined a few different types of interacting galaxies and the implications the data has on cosmological theories. An analysis of the Holmberg Effect, Holmberg (1969)’s observation that companion galaxies tend to be near the poles of edge-on galaxies rather than in the planes, was done by reexamining the spirals viewed by Holmberg. Only using radial velocity confirmed companions to test for this effect showed that if anything, the opposite of the Holmberg effect is true. However, due to small number statistics, more edge-on spirals and their companions would have to be viewed in order to determine if this …
Shaping Graphene: An Alternative Approach, Ian W. Frank
Shaping Graphene: An Alternative Approach, Ian W. Frank
Pomona Senior Theses
With experimentation on graphene (an atomic layer of graphite) becoming more and more common it is imperative that we have the capability to shape the material beyond the random manner in which it is deposited by mechanical exfoliation. This capability would be invaluable not only for the interesting electronic and optical properties that can be obtained, but also potentially for characterizing the mechanical resonators that we have been able to fabricate here at Pomona College by suspending few-layer graphene sheets over trenches in SiO2. We propose novel methods for etching graphene that should allow us to shape the material when …
Reactivity Of Ptii "Pincer" Complexes With Carbon Monoxide, Margaret L. Scheuermann
Reactivity Of Ptii "Pincer" Complexes With Carbon Monoxide, Margaret L. Scheuermann
Scripps Senior Theses
ABSTRACT Upon addition of carbon monoxide (CO) to a solution of (k-N, C, N-2, 6-bis(diethylaminomethyl)-phenyl)methyl platinum(II),[NCN]PtMe,(1), a ligand arm is displaced to form [SP-4-2] ((k-N,C-2,6-bis(diethylaminomethyl)-phenyl) carbonmethyl platinum(II), N[CN]Pt(CO)(Me),(2). Addition of CO to a THF solution of 2 results in the formation of [SP-4-3]((k-N,C-2,6-bis(diethylaminomethyl)-phenyl)acylcarbonyl platinum(II),N[CN]pt(Ac)(CO),(3). In THF ,2 partially isomerizes in the presence of CO to form [SP-4-4]((k-N,C-2,6-bis(diethylaminomethyl)-phenyl)carbonylmethyl platinum(II), N[CN]Pt(Me)(CO).(2’).in equilibrium with 2(K=ca.2 at 100 degree celcius). In the absence of CO, only trace isomerization was observed. Thermolysis of 3 results in the formation of 2 and 2’ , while a reaction of 3 with trimethylamine N-oxide results exclusively in the …
Bridging The Gender Gap In Quantum Physics, Gordon Stecklein
Bridging The Gender Gap In Quantum Physics, Gordon Stecklein
Pomona Senior Theses
Why is it important to study the gender gap in physics? Despite entering the workforce in increasing numbers over the last fifty years, women remain severely underrepresented in science and technology-related careers, particularly in positions of authority. Simultaneously, numerous studies verify that women have the ability to perform as well as – or better than – males in physics, and, when presented in certain lights, as many women as men show an interest in physics. Changes must be made in order to strive for equality and, given the changing demographic of the workforce, increase our country’s diminishing scientific prowess.
Acoustical Measurement Of The Human Vocal Tract: Quantifying Speech & Throat-Singing, Bryant R. Foresman
Acoustical Measurement Of The Human Vocal Tract: Quantifying Speech & Throat-Singing, Bryant R. Foresman
Pomona Senior Theses
The field of biological acoustics has witnessed a steady increase in the research into overtone singing, or “throat-singing,” in which a singer utilizes resonance throughout the vocal tract to sing melodies with the overtones created by a vocal drone. Recent research has explored both how a singer vocalizes in order to obtain rich harmonics from a vocal drone, as well as how further manipulations of the vocal apparatus function to filter and amplify selected harmonics. In the field of phonetics, vowel production is quantified by measuring the frequencies of vocal tract resonances, or formants, which a speaker manipulates to voice …