Proposals
Below are some proposals for talks from the past (and current). By clicking on the ID number, more details are shown. By default, these are sorted chronologically (recent first) and by then by last name. The data can be sorted by alternate means by using the links at the top right, each allowing ascending or descending orders.
Displaying 461-471 of 471 results.
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ID:
566
Year: 2021
Name: Zonghao Zou
Institution: Santa Clara University
Subject area(s):
Title of Talk: Helical trajectories of swimming cells with a flexible flagellar hook
Abstract: The flexibility of the bacterial flagellar hook is believed to have substantial consequences for microorganism locomotion. Using a simplified model of a rigid flagellum and a flexible hook, we show that the paths of axisymmetric cell bodies driven by a single flagellum in Stokes flow are generically helical. Phase-averaged resistance and mobility tensors are produced to describe the flagellar hydrodynamics, and a helical rod model which retains a coupling between translation and rotation is identified as a distinguished asymptotic limit. A supercritical Hopf bifurcation in the flagellar orientation beyond a critical ratio of flagellar motor torque to hook bending stiffness, which is set by the spontaneous curvature of the flexible hook, the shape of the cell body, and the flagellum geometry, can have a dramatic effect on the cell's trajectory through the fluid. Although the equilibrium hook angle can result in a wide variance in the trajectory's helical pitch, we find a very consistent prediction for the trajectory's helical amplitude using parameters relevant to swimming P. aeruginosa cells.
Year: 2021
Name: Zonghao Zou
Institution: Santa Clara University
Subject area(s):
Title of Talk: Helical trajectories of swimming cells with a flexible flagellar hook
Abstract: The flexibility of the bacterial flagellar hook is believed to have substantial consequences for microorganism locomotion. Using a simplified model of a rigid flagellum and a flexible hook, we show that the paths of axisymmetric cell bodies driven by a single flagellum in Stokes flow are generically helical. Phase-averaged resistance and mobility tensors are produced to describe the flagellar hydrodynamics, and a helical rod model which retains a coupling between translation and rotation is identified as a distinguished asymptotic limit. A supercritical Hopf bifurcation in the flagellar orientation beyond a critical ratio of flagellar motor torque to hook bending stiffness, which is set by the spontaneous curvature of the flexible hook, the shape of the cell body, and the flagellum geometry, can have a dramatic effect on the cell's trajectory through the fluid. Although the equilibrium hook angle can result in a wide variance in the trajectory's helical pitch, we find a very consistent prediction for the trajectory's helical amplitude using parameters relevant to swimming P. aeruginosa cells.
ID:
567
Year: 2021
Name: Billy Jackson
Institution: University of Wisconsin, Madison
Subject area(s): Undergraduate Mathematics Education
Title of Talk: Using Task Based Learning in Undergraduate Math Classes
Abstract: Task-based learning (TBL) has been used in K-12 education for quite some time. Although it is common in courses for elementary teachers, it is not regularly seen in other undergraduate courses. In this talk, I will present a working definition of TBL and provide examples of tasks in various introductory undergraduate math classes from College Algebra through Calculus. I will share examples of student comments and situations from my own courses that demonstrate just how powerful a tool TBL can be for instructors.
Year: 2021
Name: Billy Jackson
Institution: University of Wisconsin, Madison
Subject area(s): Undergraduate Mathematics Education
Title of Talk: Using Task Based Learning in Undergraduate Math Classes
Abstract: Task-based learning (TBL) has been used in K-12 education for quite some time. Although it is common in courses for elementary teachers, it is not regularly seen in other undergraduate courses. In this talk, I will present a working definition of TBL and provide examples of tasks in various introductory undergraduate math classes from College Algebra through Calculus. I will share examples of student comments and situations from my own courses that demonstrate just how powerful a tool TBL can be for instructors.
ID:
568
Year: 2021
Name: José Contreras
Institution: Ball State University
Subject area(s): Geometry
Title of Talk: The Power of GeoGebra to Investigate Converse Problems
Abstract: In this presentation, I illustrate how my students and I use GeoGebra to explore geometric converse problems. In particular, we use GeoGebra to gain insight into the solution to the following three problems: 1) Let ABCD be a quadrilateral with medial quadrilateral EFGH. If EFGH is a rectangle, what type of quadrilateral is ABCD? 2) Let E, F, G, and H be the midpoints of the consecutive sides of a quadrilateral ABCD. If EFGH is a rhombus, characterize quadrilateral ABCD. 3) E, F, G, and H are the midpoints of the consecutive sides of a quadrilateral ABCD. Name quadrilateral ABCD when EFGH is a square.
Year: 2021
Name: José Contreras
Institution: Ball State University
Subject area(s): Geometry
Title of Talk: The Power of GeoGebra to Investigate Converse Problems
Abstract: In this presentation, I illustrate how my students and I use GeoGebra to explore geometric converse problems. In particular, we use GeoGebra to gain insight into the solution to the following three problems: 1) Let ABCD be a quadrilateral with medial quadrilateral EFGH. If EFGH is a rectangle, what type of quadrilateral is ABCD? 2) Let E, F, G, and H be the midpoints of the consecutive sides of a quadrilateral ABCD. If EFGH is a rhombus, characterize quadrilateral ABCD. 3) E, F, G, and H are the midpoints of the consecutive sides of a quadrilateral ABCD. Name quadrilateral ABCD when EFGH is a square.
ID:
569
Year: 2021
Name: fpkonknrz uuEDLRaXwRxj
Institution: PiZiaywrPvCbUWk
Subject area(s): dyhNGEhkRvX
Title of Talk: PrnGztILsXtiHZgrG
Abstract: uQyxdz tcasmqfoyqzl, [url=http://yiemusmfoehv.com/]yiemusmfoehv[/url], [link=http://ribieozvmfqs.com/]ribieozvmfqs[/link], http://dojdkzctkcts.com/
Year: 2021
Name: fpkonknrz uuEDLRaXwRxj
Institution: PiZiaywrPvCbUWk
Subject area(s): dyhNGEhkRvX
Title of Talk: PrnGztILsXtiHZgrG
Abstract: uQyxdz tcasmqfoyqzl, [url=http://yiemusmfoehv.com/]yiemusmfoehv[/url], [link=http://ribieozvmfqs.com/]ribieozvmfqs[/link], http://dojdkzctkcts.com/
ID:
570
Year: 2021
Name: James Sellers
Institution: University of Minnesota - Duluth
Subject area(s):
Title of Talk: Revisiting What Euler and the Bernoullis Knew About Convergent Infinite Series
Abstract: All too often in first-year calculus classes, conversations about infinite series stop with discussions about convergence or divergence. Such interactions are, unfortunately, not often illuminating or intriguing. Interestingly enough, Jacob and Johann Bernoulli and Leonhard Euler (and their contemporaries in the early 18th century) knew quite a bit about how to find the *exact* values of numerous families of convergent infinite series. In this talk, I will show two sets of *exact* results in this vein. The talk will be accessible to anyone interested in mathematics.
Year: 2021
Name: James Sellers
Institution: University of Minnesota - Duluth
Subject area(s):
Title of Talk: Revisiting What Euler and the Bernoullis Knew About Convergent Infinite Series
Abstract: All too often in first-year calculus classes, conversations about infinite series stop with discussions about convergence or divergence. Such interactions are, unfortunately, not often illuminating or intriguing. Interestingly enough, Jacob and Johann Bernoulli and Leonhard Euler (and their contemporaries in the early 18th century) knew quite a bit about how to find the *exact* values of numerous families of convergent infinite series. In this talk, I will show two sets of *exact* results in this vein. The talk will be accessible to anyone interested in mathematics.
ID:
571
Year: 2021
Name: Angela Kohlhaas
Institution: Loras College
Subject area(s):
Title of Talk: What Does It Mean to Have a Vocation in Mathematics?
Abstract: "Vocation" can be a confusing and even divisive word, but at Loras College, we take the term to mean finding your life's purpose or your way of seeking the common good for society. How can mathematics help our students find purpose and meaning in life? Do our students see mathematics as a way of seeking the common good? Do we? How do we cultivate a sense of mathematical vocation in our students? How do we grow in our own mathematical vocation and share it with our students?
Year: 2021
Name: Angela Kohlhaas
Institution: Loras College
Subject area(s):
Title of Talk: What Does It Mean to Have a Vocation in Mathematics?
Abstract: "Vocation" can be a confusing and even divisive word, but at Loras College, we take the term to mean finding your life's purpose or your way of seeking the common good for society. How can mathematics help our students find purpose and meaning in life? Do our students see mathematics as a way of seeking the common good? Do we? How do we cultivate a sense of mathematical vocation in our students? How do we grow in our own mathematical vocation and share it with our students?
ID:
572
Year: 2021
Name: Catherine Hsu
Institution: Swarthmore College
Subject area(s):
Title of Talk: Projective and Non-Abelian SET
Abstract: Mathematicians love SET. On the surface, this classic game is a con test of pattern recognition, but it also presents an interesting way to visualize the geometry of a torus over a finite field. In this talk, we will discuss some of the mathematics connected to SET and then explore several new versions of the game, including one arising from projective geometry and one arising from non-abelian groups. In particular, we will see how these non-abelian variations on SET can give intuitive visualizations of abstract group structures.
Year: 2021
Name: Catherine Hsu
Institution: Swarthmore College
Subject area(s):
Title of Talk: Projective and Non-Abelian SET
Abstract: Mathematicians love SET. On the surface, this classic game is a con test of pattern recognition, but it also presents an interesting way to visualize the geometry of a torus over a finite field. In this talk, we will discuss some of the mathematics connected to SET and then explore several new versions of the game, including one arising from projective geometry and one arising from non-abelian groups. In particular, we will see how these non-abelian variations on SET can give intuitive visualizations of abstract group structures.
ID:
573
Year: 2021
Name: Amanda Matson
Institution: Clarke University
Subject area(s):
Title of Talk: Smiling While Grading: A Pursuit of a Paradox
Abstract: Dr. Matson will share the outcomes-based approach developed jointly with Dr. Kingston that ended with smiling while grading.
Year: 2021
Name: Amanda Matson
Institution: Clarke University
Subject area(s):
Title of Talk: Smiling While Grading: A Pursuit of a Paradox
Abstract: Dr. Matson will share the outcomes-based approach developed jointly with Dr. Kingston that ended with smiling while grading.
ID:
574
Year: 2021
Name: Sergio Loch
Institution: Grand View University
Subject area(s):
Title of Talk: Initial Report on work about Math Transition
Abstract: Approaching existing issues for the high school to college transition requires the collaboration of the players involved in this transition: students, parents, teachers, instructors, counselors, and all their institutions and professional organizations. IHEMTAC is attempting to develop and propose ideas in the crucial area of mathematics to facilitate this interaction.
Year: 2021
Name: Sergio Loch
Institution: Grand View University
Subject area(s):
Title of Talk: Initial Report on work about Math Transition
Abstract: Approaching existing issues for the high school to college transition requires the collaboration of the players involved in this transition: students, parents, teachers, instructors, counselors, and all their institutions and professional organizations. IHEMTAC is attempting to develop and propose ideas in the crucial area of mathematics to facilitate this interaction.
ID:
575
Year: 2022
Name: johnansog jVddjdweBkriNeLUdzZ
Institution: WqXQtgMknm
Subject area(s): UYENATbCZewLr
Title of Talk: kCogoGTpEOaLyGxek
Abstract: http://imrdsoacha.gov.co/silvitra-120mg-qrms
Year: 2022
Name: johnansog jVddjdweBkriNeLUdzZ
Institution: WqXQtgMknm
Subject area(s): UYENATbCZewLr
Title of Talk: kCogoGTpEOaLyGxek
Abstract: http://imrdsoacha.gov.co/silvitra-120mg-qrms
ID:
576
Year: 2022
Name: uaatmtxffx IXuZSWBijffvScmF
Institution: hZfHkLnweN
Subject area(s): uqJKXIEllzYMVERy
Title of Talk: fnZOTELxLsKibpvdNLR
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Year: 2022
Name: uaatmtxffx IXuZSWBijffvScmF
Institution: hZfHkLnweN
Subject area(s): uqJKXIEllzYMVERy
Title of Talk: fnZOTELxLsKibpvdNLR
Abstract: wL5CAp zwigtouwyijb, [url=http://xdsgjxqrkoje.com/]xdsgjxqrkoje[/url], [link=http://yazimtnofxob.com/]yazimtnofxob[/link], http://kkduhrmioscj.com/