Navigating Boundaries: The Development of Lewis, Clark and Pike in the Historic Consciousness

This papers seeks to evaluate modern conceptions that have emerged regarding the Expeditions of Lewis and Clark, and Zebulon Pike. Instead of being thought as separate enterprises, the article argues that these two expeditions should be jointly considered as outgrowths of an American expansionist ideology and that the expeditions are examples of this growing national interest in the West

Performance prediction evaluation of ceramic materials in point-focusing solar receivers

A performance prediction was adapted to evaluate the use of ceramic materials in solar receivers for point focusing distributed applications. System requirements were determined including the receiver operating environment and system operating parameters for various engine types. Preliminary receiver designs were evolved from these system requirements. Specific receiver designs were then evaluated to determine material functional requirements

Effects of Movement, Growth Mindset and Math Talks on Math Anxiety

Mathematical anxiety is prevalent in our schools. This research provides insight into how mathematical anxiety develops and how it affects students throughout their lives. This study focuses on the mathematical anxiety and mathematical self-concept of five second grade classes at an economically disadvantaged school in rural North Texas. The study looked to see if adding the interventions of movement, mathematical growth mindset and math talks to a classroom would improve the mathematical self-concept of the children in the classrooms which participated. The study contained three classrooms of students who participated in the interventions and two classrooms which were used as a control group. All five second grade classrooms completed a pre and post-intervention survey of mathematical self-concepts. The three main categories measured by the survey were math self-concept, comfort using different mathematical strategies and comfort level with discussing and using math concepts in front of peers. The children received mathematical movement lessons on Mondays, growth mindset journaling and discussions on Tuesdays and mental math number talks on Wednesdays. After the four-week study, the results showed an overall gain in positive responses for the three categories, which were measured for this study in the intervention group. The control group did not show as much of a positive gain as the intervention group did, and in some cases actually went down in positive responses

Velocity map imaging of the dynamics of the CH3 + HCl -> CH4 + Cl reaction using a dual molecular beam method

International audienceThe reactions CH3 + HCl → CH4 + Cl(²P_3/2) and CD₃ + HCl → CD₃H + Cl(²P_3/2) have been studied by photo-initiation (by CH₃I or CD₃I photolysis at 266 nm) in a dual molecular beam apparatus. Product Cl(²P</sub>3/2</sub>) atoms were detected using resonance enhanced multi-photon ionisation and velocity map imaging, revealing product translational energy and angular scattering distributions in the centre-of-mass frame. Image analysis is complicated by the bimodal speed distribution of CH₃ (and CD₃) radicals formed in coincidence with I(²P_3/2) and I(²P_1/2) atoms from CH₃I (CD₃I) photodissociation, giving overlapping Newton diagrams with displaced centre of mass velocities. The relative reactivities to form Cl atoms are greater for the slower CH₃ speed group than the faster group by factors of ~1.5 for the reaction of CH₃ and ~2.5 for the reaction of CD₃, consistent with the greater propensity of the faster methyl radicals to undergo electronically adiabatic reactions to form Cl(²P_1/2). The average fraction of the available energy becoming product translational energy is = 0.48 ± 0.05 and 0.50 ± 0.03 for reaction of the faster and slower sets of CH₃ radicals, respectively. The Cl atoms are deduced to be preferentially forward scattered with respect to the HCl reagents, but the angular distributions from the dual beam imaging experiments require correction for under-detection of forward scattered Cl products

REMOTE SENSING APPROACH FOR TERRAMECHANICS APPLICATIONS UTILIZING MACHINE AND DEEP LEARNING

Terrain traversability is critical for developing Go/No Go maps, significantly impacting a mission\u27s success. To predict the mobility of a vehicle over a terrain, one must understand the soil characteristics. In situ measurements performed by soldiers in the field are the current method of collecting this information, which is time-consuming, are only point measurements, and can put soldiers in harm\u27s way. Therefore, this study investigates using remote sensing as an alternative approach to characterize terrain properties. This approach will explore the relationships between electromagnetic radiation and soil types with varying properties. Optical, thermal, and hyperspectral sensors will be used to collect remote data and compare it against ground truth measurements for validation. Machine learning (linear, ridge, lasso, partial least squares, support vector machines, and k nearest neighbors) and deep learning (multi-layer perceptron and convolutional neural network) algorithms will be used to build prediction models. Results showed that soil properties such as soil gradation, moisture content, and soil strength measured by a geogauge and averaged cone penetrometer for 0-6” and 0-12” (CP06 and CP12) can be estimated remotely. Deep learning provides the best models for estimating terrain characteristics compared to machine learning. It is shown that this method can produce much finer spatial resolution coverage than traditional geospatial point-based interpolation approaches and yield a higher prediction accuracy. Predictions maps can be used to generate threshold-based Go / No Go maps using a vehicle cone index or as a cost map for vehicle performance. A Polaris MRZR vehicle was used to test the application of these prediction maps for mobility purposes, and correlations were observed between the CP06 and rear wheel slip and CP12 and vehicle speed. This study demonstrates the potential of using remote sensing data for more rapid and finer spatial resolution predictions of terrain properties with higher accuracies compared to traditional in situ mapping methods implementing machine and deep learning algorithms. The remote sensing approach allows the generation of Go/No Go and vehicle cost maps and, most importantly, provides a safe alternative to keep soldiers out of harm’s way

An historical review of the experiences of Eastern Washington University African-American male athletes from the 1960\u27s to the 1970\u27s

This study provided an historical examination of experiences of Eastern Washington University African-American Athletes, as well as their Coaches, and Athletic Directors. The interviewees all attended Eastern during the 60\u27s and 70\u27s. Three African-American players, four coaches who coached them, and three Athletic Director\u27s were interviewed in the study. This study examines how African-American athletes at Eastern were influenced by other African-American athletes or leaders from the 60\u27s through the early 70\u27s. The study also investigates whether or not the Cheney Community was directly affected by these changes that occurred in the 60\u27s through the early 70\u27s. This study shows that Eastern Washington University was directly affected by the civil unrest that was occurring in the United States. This study also identified many protests which took place at Eastern, and one in particular a clinched fist incident that rivaled Tommie Smith\u27s and John Carlos clinched fist in the 1968 Olympic games in Mexico. There is evidence in this study that there were some racial tensions throughout the 60\u27s and 70\u27s, which Coaches, and Athletic Directors had to deal with