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Engaging All Mathematical Learners Through Project-Based Design
Get PDFThe authors describe a project-based activity using TI calculators or Desmos within a high schoolmathematics classroom. As students learn about functions with technology using a project-based approach, they make connections between school mathematics and topics of personal interest
Formulas! Formulas! Everywhere! A few activities to introduce area
No full textThis article describes activities that can be used to introduce the concepts of perimeter and area with conceptual understanding for students in grades 4 through 9. The transformations of reflection and rotation are used to build this understanding
Sitting Meditation (Mindfulness) and Music Meditation Effects on Overall Anxiety and Test Anxiety in a College Student Population
Get PDFBackground: Research shows that mindfulness interventions for test anxiety in a college student population are beneficial (Lothes, Mochrie, Wilson, & Hakan, 2021). This study expands on the existing literature by examining how distance learning mindfulness practices may affect anxiety in college students.
Aim: This study assessed the effects of online mindfulness practices over a five-week period on test anxiety in college students.
Method: Participants included 31 college students that were randomly assigned to either a sitting meditation or music meditation condition. The two groups were also split in half to add a wait list control condition. A weekly schedule of mindfulness practices was given to participants to complete on their own.
Results: Participants in the sitting meditation condition showed significant within-group reductions in test anxiety, overall anxiety, and mindfulness from start to finish. The music meditation group showed no changes in test anxiety. However, overall anxiety showed decreases in scores, and overall mindfulness did show significant increases for this group.
Conclusion: Mindfulness may play a role in the reduction of anxiety and test anxiety. Further research is needed to more definitively assess how music meditation may impact anxiety
Dance as a Means of Introducing Asymmetrical Meter
No full textIn this essay, I offer resources for teaching two contemporary folk dances from southeastern Europe, taking advantage of students' capacity for imitation and embodiment to introduce skills and concepts connected with asymmetrical meter. After a few preliminary notes about meter, I describe how an instructor could go about teaching pravoto, a dance from North Macedonia, and then suggest several options for continuing the lesson
Enzyme Kinetics of Recombinant Dihydroorotase from Methanococcus jannaschii
Get PDFDihydroorotase (DHOase) catalyzes the reversible cyclization of N-carbamoyl-L aspartate (CA) to L-dihydroorotate (DHO) in the third step of de novo pyrimidine biosynthesis. The reaction is pH dependent; at low pH the biosynthetic reaction is favored (CA to DHO) and at high pH the degradative reaction is favored (DHO to CA). Even though DHOases share a common catalytic mechanism, they form a very diverse family of proteins. Methanococcus jannaschii is a hyperthermophilic and barophilic archaeon and its DHOase (Mj DHOase) is the first archaeal one that is being studied. A previously conducted physicochemical characterization of Mj DHOase gave information into its similarities and differences from the other known DHOases. In that study, enzyme kinetics were only analyzed in the degradative direction. The purpose of the current work is to further characterize Mj DHOase by studying the kinetics in the biosynthetic direction and the dependence of the reaction on pH in both directions. The properties obtained are compared with other known DHOases. The specific activity of Mj DHOase in the biosynthetic direction is approximately half the specific activity in the degradative direction, similar to human DHOase. Mj DHOase exhibits the characteristic pH dependence of the reaction
Proof Without Words : The Sum of the First n Odd Integers is a Perfect Square
Get PDFIn this proof without words, we prove wordlessly the identity 1+3+5+...+(2n-1)=n^2
Introduction: Beyond Western Musicalities
No full textIt has become increasingly clear that the way we teach music theory is not only incomplete, it is insufficient, even irresponsible. This introduction elucidates some of the key issues around diversifying and decolonizing music theory classrooms. Following a brief framing of the issues, a triptych of short thought pieces examines the contexts and implications of such questions. Dylan Robinson locates core curricula as a "ground" upon which music programs are built and which might be "given back" to BIPOC scholars to re-define; Anna Yu Wang advocates for classroom methodologies which center diverse modes of listening as foundations for music theorizing; and Maya Cunningham considers how Western music theory systems and training are historically colonial and continue to be driven by cultural and economic bias and inequity. Finally, in an ambitious co-authored work, Chris Stover, Leslie Tilley, and Anna Yu Wang organize, synthesize, and extrapolate from survey responses by twenty-four music scholar-pedagogues to offer a panoramic view on diversifying and decolonizing efforts. The essay addresses challenges, disagreements, goals, and possible ways forward, and through its explorations encourages sustained reflection, accountability, and change
Subsurface Relationships between the Sebree Trough and Carbonate-Siliciclastic Mixing in the Upper Ordovician Lexington-Trenton and Point Pleasant-Utica Intervals in Ohio, USA, using Multivariate Statistical Well Log Analysis
Get PDFThe Upper Ordovician (lower Katian; upper Chatfieldian-lower Edenian) Lexington-Trenton limestone and Point Pleasant-Utica shale intervals are important subsurface stratigraphic units across Ohio as they are the sources of significant conventional and unconventional hydrocarbon resources. However, both units exhibit anomalous distributions across the state and heterogeneous relationships, especially in areas where they intertongue. The limestone units show a peculiar SW-NE thinning trend across Ohio, whereas the overlying shale units show an anomalous thickening along the same trend—a trend associated with the poorly understood Sebree Trough, a supposed Late Ordovician paleobathymetric low related to the coeval Taconic Orogeny. To explore relationships amon Lexington-Trenton carbonates, Point Pleasant-Utica shales, and the presumed Sebree Trough, multivariate statistical analysis was used to compare geophysical well logs across the state with well logs referenced to the mineral content of 4 Lexington-Trenton-Point Pleasant-Utica cores. Comparing well-log responses with the mineral content of the reference cores allowed the discernment of 10 electrofacies, keyed to lithofacies in the cores. Software analysis of many other well logs across the state then made electrofacies assignments by comparing well-log responses from the other wells with well-log responses from the reference cores preset into the software. Electrofacies responses were color-coded, mapped in wells at 0.6 m (2 ft) resolution, and used to make section lines and isopach maps of similar electrofacies. Isopach maps and cross sections confirm the presence of the Sebree Trough across Ohio, with trends that parallel existing and projected basement structures. This suggests that the Sebree Trough in Ohio was a bathymetric low, which was, at least in part, controlled by reactivation of basement structures due to far-field Taconic stresses
A Demographic Profile of the Elkhart-LaGrange Old Order Amish Settlement
Get PDFIn 1970, Johns Hopkins University produced the first Indiana Amish directory. Its goals were narrowly related to genetic research, and it opened a window into a nearly complete census of this settlement. It is rare in social science to have such a complete picture of any population. A decade later, the second directory was published. The Amish decided to put their own energy into producing this compendium of birth dates, family size, district maps, and detailed information on the ministerial history of the settlement.
Using the data from eight directories, we can provide a nearly complete analysis of demographic change in the third largest Amish settlement in the world. In this study, we look at growth in settlement size, changes in family size, migration in and out of the settlement, defection and retention of Amish young people, the growth in nonfarm occupations over time, and the frequency of prominent family names
