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:
223
Year: 2008
Name: Charles Ashbacher
Institution: #none
Subject area(s): Recreational mathematics
Title of Talk: Computer Investigations of Problems in Pickover
Abstract: Clifford Pickover, who has been described as the
Year: 2008
Name: Charles Ashbacher
Institution: #none
Subject area(s): Recreational mathematics
Title of Talk: Computer Investigations of Problems in Pickover
Abstract: Clifford Pickover, who has been described as the
ID:
504
Year: 2018
Name: Charles Ashbacher
Institution: Charles Ashbacher Technologies
Subject area(s): Recreational mathematics
Title of Talk: Mathematical Venery and Other Humor
Abstract: In modern usage, the term “venery” refers to the pursuit of sexual pleasure, yet in medieval times it referred to the act of game hunting. The terms of venery refers to the rather unusual words used to describe a collection of animals of the same species. Charles W. Trigg composed a paper published in Journal of Recreational Mathematics that used this term to refer to the naming of collections of math people and objects. He listed some examples and this paper opens with additional examples created by the author. It concludes with some additional examples of mathematical humor.
Year: 2018
Name: Charles Ashbacher
Institution: Charles Ashbacher Technologies
Subject area(s): Recreational mathematics
Title of Talk: Mathematical Venery and Other Humor
Abstract: In modern usage, the term “venery” refers to the pursuit of sexual pleasure, yet in medieval times it referred to the act of game hunting. The terms of venery refers to the rather unusual words used to describe a collection of animals of the same species. Charles W. Trigg composed a paper published in Journal of Recreational Mathematics that used this term to refer to the naming of collections of math people and objects. He listed some examples and this paper opens with additional examples created by the author. It concludes with some additional examples of mathematical humor.
ID:
507
Year: 2018
Name: Charles Ashbacher
Institution: Charles Ashbacher Technologies
Subject area(s): Recreational mathematics
Title of Talk: Which Gender is Happier in the United States? What About Other Countries?
Abstract: For any number, if the sum of the squares of the digits is performed and then repeated, there are two possible outcomes. The process eventually terminates at 1 or goes into an infinite cycle. If the process terminates at 1, then the original number is said to be “happy.” For any word, if the letter assignments a = 1, b = 2, c = 3 and so on are done, then the word can be assigned a number. If the word is a name and the associated number is “happy,” then the name is said to be a “happy name.” In this presentation, the 100 most common male and female names in several countries are examined to determine which gender is “happier.”
Year: 2018
Name: Charles Ashbacher
Institution: Charles Ashbacher Technologies
Subject area(s): Recreational mathematics
Title of Talk: Which Gender is Happier in the United States? What About Other Countries?
Abstract: For any number, if the sum of the squares of the digits is performed and then repeated, there are two possible outcomes. The process eventually terminates at 1 or goes into an infinite cycle. If the process terminates at 1, then the original number is said to be “happy.” For any word, if the letter assignments a = 1, b = 2, c = 3 and so on are done, then the word can be assigned a number. If the word is a name and the associated number is “happy,” then the name is said to be a “happy name.” In this presentation, the 100 most common male and female names in several countries are examined to determine which gender is “happier.”
ID:
115
Year: 2005
Name: Mahmoud Almanassra
Institution: Wartburg College
Subject area(s):
Title of Talk: On the Negative Mass Assigned By the Univariate Zao-Tsiatis and Wang Estimators
Abstract: The Zhao-Tsiatis estimator, for the restricted quality adjusted lifetime (RQAL), is not a monotonic estimator and hence it is not a proper survival function. The Wang estimator, which is a modified version of the ZT-estimator, is also not a monotonic estimator. Both the ZT-estimator and the W-estimator are consistent and reasonably efficient estimators. The simple weighted estimator is monotonic and consistent, but it is less efficient than the other two estimators mentioned above. I will identify the jump points of the simple weighted estimator, the ZT-estimator and the W-estimator. I will also identify which of these points are assigned a negative mass by the estimator. Moreover, I will propose two new consistent estimators for the survival functions of the RQAL.
Year: 2005
Name: Mahmoud Almanassra
Institution: Wartburg College
Subject area(s):
Title of Talk: On the Negative Mass Assigned By the Univariate Zao-Tsiatis and Wang Estimators
Abstract: The Zhao-Tsiatis estimator, for the restricted quality adjusted lifetime (RQAL), is not a monotonic estimator and hence it is not a proper survival function. The Wang estimator, which is a modified version of the ZT-estimator, is also not a monotonic estimator. Both the ZT-estimator and the W-estimator are consistent and reasonably efficient estimators. The simple weighted estimator is monotonic and consistent, but it is less efficient than the other two estimators mentioned above. I will identify the jump points of the simple weighted estimator, the ZT-estimator and the W-estimator. I will also identify which of these points are assigned a negative mass by the estimator. Moreover, I will propose two new consistent estimators for the survival functions of the RQAL.
ID:
120
Year: 2005
Name: Jeremy Alm
Institution: Iowa State University
Subject area(s): Algebra, Logic
Title of Talk: Don't Be So Sensitive! --On the Definition(s) of a Group
Abstract: We have all seen different variations on the definition of a group, and we all know that each one admits "the same structures". There are, however, some subtle but important differences among them. The class of groups and the properties that it has are sensitive to the signature (or similarity type) in which the groups are defined. In particular, in some signatures equational definitions are possible and in others they are not.
Year: 2005
Name: Jeremy Alm
Institution: Iowa State University
Subject area(s): Algebra, Logic
Title of Talk: Don't Be So Sensitive! --On the Definition(s) of a Group
Abstract: We have all seen different variations on the definition of a group, and we all know that each one admits "the same structures". There are, however, some subtle but important differences among them. The class of groups and the properties that it has are sensitive to the signature (or similarity type) in which the groups are defined. In particular, in some signatures equational definitions are possible and in others they are not.
ID:
146
Year: 2006
Name: Jeremy Alm
Institution: Iowa State University
Subject area(s): mathematical logic, pedagogy
Title of Talk: Godel Disrobes: a naked approach to incompleteness
Abstract: I propose an alternate approach to the incompleteness theorems via the conceptually simpler \emph{abstract provability systems}, due to Raymond Smullyan. These systems have incompleteness theorems that are easy to prove, and whose hypotheses point to the important features of formal arithmetic.
Year: 2006
Name: Jeremy Alm
Institution: Iowa State University
Subject area(s): mathematical logic, pedagogy
Title of Talk: Godel Disrobes: a naked approach to incompleteness
Abstract: I propose an alternate approach to the incompleteness theorems via the conceptually simpler \emph{abstract provability systems}, due to Raymond Smullyan. These systems have incompleteness theorems that are easy to prove, and whose hypotheses point to the important features of formal arithmetic.
ID:
72
Year: 2004
Name: Daniel Alexander
Institution: Drake University
Subject area(s): History of mathematics
Title of Talk: Stefan Banach During World War II
Abstract: There is virtually no mention in mathematical literature of Stefan Banach's experience during World War II. This is unfortunate because not were his experiences fairly dramatic, but they are part of a greater story of the Polish Resistance during World War II. This presentation will discuss how Banach survived the Nazi occupation despite Nazi plans to annihilate the Polish intelligentsia. It will also discuss the role of a relatively unknown "Schindleresque"factory owner, Rudolf Stefan Weigl.
Year: 2004
Name: Daniel Alexander
Institution: Drake University
Subject area(s): History of mathematics
Title of Talk: Stefan Banach During World War II
Abstract: There is virtually no mention in mathematical literature of Stefan Banach's experience during World War II. This is unfortunate because not were his experiences fairly dramatic, but they are part of a greater story of the Polish Resistance during World War II. This presentation will discuss how Banach survived the Nazi occupation despite Nazi plans to annihilate the Polish intelligentsia. It will also discuss the role of a relatively unknown "Schindleresque"factory owner, Rudolf Stefan Weigl.
ID:
126
Year: 2005
Name: Dan Alexander
Institution: Drake University
Subject area(s): History of Mathematics
Title of Talk: The History of Complex Dynamics, Part II
Abstract: Part I was given to the Iowa section in 1994 and focused on the 1918 papers of Pierre Fatou and Gaston Julia on which the contemporary study of complex dynamics is based. In part II I will talk about both prior and subsequent developments in an attempt to put these 1918 papers in a more complete historical context. In particular, I will discuss some "new" influences on their works that I have recently been made aware of as well as discuss contemporaneous (that is, immediately following World War I) studies of complex dynamics around the world. I will also gladly review the works of Fatou and Julia for those who were not present for (or can't quite recall) Part I. This talk is based on collaborative research by Felice Iavernaro, Alessandro Rosa, and me.
Year: 2005
Name: Dan Alexander
Institution: Drake University
Subject area(s): History of Mathematics
Title of Talk: The History of Complex Dynamics, Part II
Abstract: Part I was given to the Iowa section in 1994 and focused on the 1918 papers of Pierre Fatou and Gaston Julia on which the contemporary study of complex dynamics is based. In part II I will talk about both prior and subsequent developments in an attempt to put these 1918 papers in a more complete historical context. In particular, I will discuss some "new" influences on their works that I have recently been made aware of as well as discuss contemporaneous (that is, immediately following World War I) studies of complex dynamics around the world. I will also gladly review the works of Fatou and Julia for those who were not present for (or can't quite recall) Part I. This talk is based on collaborative research by Felice Iavernaro, Alessandro Rosa, and me.
ID:
433
Year: 2015
Name: Dan Alexander
Institution: Drake University
Subject area(s):
Title of Talk: Innovation through Blunder (or the Unexpected Virtues of Non-Intentionality)
Abstract: "We all make mistakes." "There is no such thing as a dumb question." "You should embrace your mistakes and learn from them." These are all things that many of us tell our students. But do we believe it? More importantly, do we follow this advice in our own teaching? What I hope to do in this talk is explore the role of mistakes in teaching with the audience. In hopes of getting the conversation rolling, I will offer a few examples of mistakes, including several I have made. some of which have led to some drastic changes in my teaching.
Year: 2015
Name: Dan Alexander
Institution: Drake University
Subject area(s):
Title of Talk: Innovation through Blunder (or the Unexpected Virtues of Non-Intentionality)
Abstract: "We all make mistakes." "There is no such thing as a dumb question." "You should embrace your mistakes and learn from them." These are all things that many of us tell our students. But do we believe it? More importantly, do we follow this advice in our own teaching? What I hope to do in this talk is explore the role of mistakes in teaching with the audience. In hopes of getting the conversation rolling, I will offer a few examples of mistakes, including several I have made. some of which have led to some drastic changes in my teaching.
ID:
219
Year: 2008
Name: Haseena Ahmed
Institution: Iowa State University
Subject area(s): Applied Mathematics, Numerical Analysis
Title of Talk: Alternating evolution (AE) schemes for hyperbolic conservation laws
Abstract: An alternating evolution (AE) system is proposed which is an accurate approximation to systems of hyperbolic conservation laws. We develop a class of local Alternating Evolution (AE) schemes, where we take advantage of high accuracy of the proposed AE approximation. Our approach is based on a sliding average of the AE system over an interval of [x − \Delta x, x + \Delta x]. The numerical scheme is then constructed by sampling the averaged system over alternating grids. Higher order accuracy is achieved by a combination of high-order polynomial reconstruction from the obtained averages and a stable Runge-Kutta discretization in time. The AE schemes have the advantage of easier formulation and implementation, and efficient computation of the solution. For the first and second order local AE schemes applied to scalar laws, we prove the numerical stability in the sense of satisfying the maximum principle and total variation diminishing (TVD) property. Numerical tests for both scalar conservation laws and compressible Euler equations are presented to demonstrate the high order accuracy and capacity of these AE schemes.
Year: 2008
Name: Haseena Ahmed
Institution: Iowa State University
Subject area(s): Applied Mathematics, Numerical Analysis
Title of Talk: Alternating evolution (AE) schemes for hyperbolic conservation laws
Abstract: An alternating evolution (AE) system is proposed which is an accurate approximation to systems of hyperbolic conservation laws. We develop a class of local Alternating Evolution (AE) schemes, where we take advantage of high accuracy of the proposed AE approximation. Our approach is based on a sliding average of the AE system over an interval of [x − \Delta x, x + \Delta x]. The numerical scheme is then constructed by sampling the averaged system over alternating grids. Higher order accuracy is achieved by a combination of high-order polynomial reconstruction from the obtained averages and a stable Runge-Kutta discretization in time. The AE schemes have the advantage of easier formulation and implementation, and efficient computation of the solution. For the first and second order local AE schemes applied to scalar laws, we prove the numerical stability in the sense of satisfying the maximum principle and total variation diminishing (TVD) property. Numerical tests for both scalar conservation laws and compressible Euler equations are presented to demonstrate the high order accuracy and capacity of these AE schemes.
ID:
510
Year: 2018
Name: Anna Aboud
Institution: Iowa State University
Subject area(s): Undergraduate Mathematics Education
Title of Talk: Implementation of Team Based Learning at Iowa State University
Abstract: Team-Based Learning (TBL) is a specific form of active learning designed to collaboratively engage students in significant problem-solving tasks. By means of a flipped classroom, students are able to spend class time working in heterogeneous groups, applying fundamental concepts to a rich applied context. In recent years, the Team-Based Learning structure has been applied with much success to select Calculus sections at Iowa State University. Quantitative data has shown that the TBL students performed better on the midterm and final calculus exams, and gave higher quality explanations. A key component of the success of the TBL method is student attitudes. To this end, a qualitative study was performed in the spring of 2018, examining the mathematical mindsets which influence the experiences and attitudes of students in a TBL classroom. In this talk we will explain how the TBL structure was applied to the Calculus curriculum at Iowa State University, share samples of the rich mathematical tasks implemented, and present the results of quantitative and qualitative studies on the efficacy of this method.
Year: 2018
Name: Anna Aboud
Institution: Iowa State University
Subject area(s): Undergraduate Mathematics Education
Title of Talk: Implementation of Team Based Learning at Iowa State University
Abstract: Team-Based Learning (TBL) is a specific form of active learning designed to collaboratively engage students in significant problem-solving tasks. By means of a flipped classroom, students are able to spend class time working in heterogeneous groups, applying fundamental concepts to a rich applied context. In recent years, the Team-Based Learning structure has been applied with much success to select Calculus sections at Iowa State University. Quantitative data has shown that the TBL students performed better on the midterm and final calculus exams, and gave higher quality explanations. A key component of the success of the TBL method is student attitudes. To this end, a qualitative study was performed in the spring of 2018, examining the mathematical mindsets which influence the experiences and attitudes of students in a TBL classroom. In this talk we will explain how the TBL structure was applied to the Calculus curriculum at Iowa State University, share samples of the rich mathematical tasks implemented, and present the results of quantitative and qualitative studies on the efficacy of this method.