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Salt Lake City, UT, United States

Vogt A.P.,Salt Lake Community College
ASEE Annual Conference and Exposition, Conference Proceedings | Year: 2015

Teaching fundamentals of engineering Strength of Materials (also called Mechanics of Materials) is challenging as a semester long course because there are nine chapters of required content. This article discusses new hybrid classroom methods and survey results implemented in the spring of 2015 at Salt Lake Community College. The hybrid classroom uses lecture videos, which students are to review outside of class, to present theoretical principles and simple examples; this allows for more class time to spend working on more complicated applications. These videos provide students another way to see theoretical principles prior to lecture. Students can play the videos multiple times before lecture so they are better prepared interact with other students in class. We anticipate these techniques will increase the efficiency of learning course materials presented in class and enable more advanced discussion and topics to be covered. In addition to standard teaching evaluations the flipping techniques are evaluated based on an extensive array of survey questions. These questions will ask students for numerical reflective evaluations on their learning and retention of class materials. © American Society for Engineering Education, 2015. Source

McNamara D.H.,Brigham Young University | Barnes J.,Salt Lake Community College
Astronomical Journal | Year: 2014

We demonstrate that the Oosterhoff II (Oo II) RR Lyrae ab variables are hotter by 270 K, at the same period, than Oo I variables. Or, at the same (〈B〉-〈V〉)0 value the Oo II variables have larger radii than Oo I variables. This accounts for the reason Oo II variables are brighter (0.12-0.20 mag) than Oo I variables. The dependence of the light amplitude of RR Lyrae variables on temperature is independent of Oo type. This makes it possible to derive an accurate set of equations to relate intrinsic (B-V)0 color indices to light amplitudes, which in turn can be used to determine the interstellar reddening (E (B-V)). With just a few variables (5), it is possible to determine the E (B-V) to an accuracy of <0.01 mag in the absence of systematic photometric errors. We discuss the errors introduced in color excess determinations by including the Blazhko stars in a solution. A comparison of color excess values of 23 globular clusters and two regions of the Large Magellanic Cloud (LMC), determined with the aid of our newly developed equations, are found to compare favorably (0.01 mag) with color excess values found in the literature. Four new Oo III variables, some found in metal-poor clusters, are discussed. An analysis of the galactic-field variables indicates the majority are Oo I and Oo II variables, but a few short-period (log P < -0.36) metal-strong variables, so far not found in galactic globular clusters are evidently 0.30 mag fainter than Oo I variables. Oo III variables may also be present in the field. We conclude that the RR Lyrae ab variables are primarily restricted to four sequences or groups. If we assume that the Oo I variables' mean absolute magnitude is Mv = 0.61, the mean absolute magnitudes of the other three sequences are: short-period variables Mv0.89 mag, Oo II Mv0.43 mag, and Oo III Mv0.29 mag. The Oo I fundamental RR Lyrae ab red edge (FRE) and fundamental blue edge (FBE) occur at approximately the following temperatures: FRE T6180 K and FBE T6750 K. There is a strong dependence of Mv on [Fe/H] as we proceed from the short-period variables to the Oo I variables and to the Oo II variables, but there seems to be little or no dependence of Mv on [Fe/H] for stars within a group, at least for the Oo I and Oo II groups. The Oo II variables exhibit a weak period luminosity relation in V in many globular clusters unlike the Oo II-like variables in Oo I clusters which do not exhibit a P-L relation. The properties of some intermediate LMC clusters are discussed. © 2014. The American Astronomical Society. All rights reserved. Source

This study examines variation in brain growth relative somatic growth in four hominoids and three platyrrhines to determine whether there is a trade-off during ontogeny. I predicted that somatic growth would be reduced during periods of extensive brain growth, and species with larger degrees of encephalization would reach a smaller body size at brain growth completion because more energy is directed towards the brain. I measured cranial capacity and skeletal size in over 500 skeletal specimens from wild populations. I calculated nonlinear growth curves and velocity curves to determine brain/body growth allometry during ontogeny. In addition, I calculated linear regressions to describe the brain/body allometry during the postnatal period prior to brain size reaching an asymptote. The results showed that somatic growth is not substantially reduced in species with extensive brain growth, and body size at brain growth completion was larger in species with greater degrees of encephalization. Furthermore, large body size at brain growth completion was not correlated with interbirth interval, but was significantly correlated with prolonged juvenile periods and late age at maturity when data were corrected for phylogeny. These results indicate that neither reduction in body growth nor reproductive rate are compensatory mechanisms for the energetic costs of brain growth. Other avenues for meeting energetic costs must be in effect. In addition, the results show that somatic growth in encephalized species is particularly slow during the juvenile period after brain growth at or near completion, suggesting that these growth patterns are explained by reasons other than energetic costs. © 2015, Springer Science+Business Media New York. Source

Sanders W.C.,Salt Lake Community College
Journal of Chemical Education | Year: 2015

This paper describes a laboratory exercise that provides students enrolled in introductory nanotechnology courses with an opportunity to synthesize polymer structures with micro- and nanoscale dimensions. Polyvinylpyrrolidone (PVP) films deposited on corrugated PDMS stamps using student-built spin coaters were transferred to clean, dry substrates via microcontact printing. The microscale dimensions of the resulting patterns were characterized in class using optical microscopy. Characterization with atomic force microscopy (AFM) was used for visualization of nanoscale vertical dimensions of the structures. This laboratory investigation highlights the following concepts often associated with polymer nanostructure fabrication: polymer synthesis, surface chemistry, soft lithography, and contact angle. It is noteworthy to mention that this laboratory exercise demonstrates the feasibility of utilizing nontoxic, cost-effective, bench-top materials to teach and investigate fundamentals associated with fabrication of polymer nanomaterials. © 2015 The American Chemical Society and Division of Chemical Education, Inc. Source

Agency: NSF | Branch: Continuing grant | Program: | Phase: | Award Amount: 909.44K | Year: 2010

This project is creating a faculty and industry mentored, student-run contract manufacturing organization known as STUDENTfacturED. Through this organization, students master competencies essential to biomanufacturing by preparing products that are needed by the community college biotechnology program, and neighboring high school biology and biotechnology programs. Both high school biotechnology and community college students, and students in the community colleges School of Business work within this organization. Mixing students from the Biomanufacturing programs with students from the School of Business allow each set to learn from the other, thereby deepening the learning of all involved.

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