4-5 pm in Williams 320 (unless otherwise indicated)

Date | Speaker | Title | Abstract |
---|---|---|---|

2/5/24 | Megan Martinez @ Provost's Colloquium, Clark Lounge, Campus Center, 4-5:30pm | The Mathematics of Hitomezashi Sashiko Embroidery | --- |

2/19/24 | Pete Maceli, Ithaca College | Self-complementary graphs | A graph is just a bunch of dots called vertices, together with lines called edges, joining certain pairs of vertices. The general nature of graphs lends them to efficiently model pairwise interactions amongst any set of objects. Important real world applications of graph theory abound in fields such as network science, economics, computer engineering and operations research. In this talk, we will look at the highly symmetric class of self-complementary graphs, which is structurally and algorithmically very rich. |

3/4/24 | Whalen Center for Music, Room 2105 (Iger Lecture Hall) Joint colloquium: Music and Math Mike Caporizzo (Music) and Dan Visscher (Math) | Can you hear the shape of an ear? Examining immersive audio and the effects of personal geometry on our perception | Dolby Atmos. Sony 360. Spatial Audio. Immersive Sound. These are terms that one may recognize as recent entries into spec sheets and promotional materials on music, video, and media equipment, and they all refer to the latest generation of surround sound formats in music, film, and television. Whereas most recorded music over the past half-century has been distributed in a stereo (2-channel) format, immersive audio creates a 3-dimensional aural environment where sound can be localized from above, behind, or even below the listener. Unlike earlier generations of surround sound (quadrophonic or Dolby 5.1, for example), modern immersive formats can be heard on multi-speaker arrays or just simple pair of headphones, and the average listener may have all the necessary hardware right in their pocket. But how can a pair of earbuds create an immersive environment, and what is required to do this convincingly? The mechanisms of this process are highly dependent on the geometry of ones’ ears, and so your brain has actually learned to decode the spatial data in your hearing in a very individualized system. This presentation will explore the fundamental concepts of sound localization in the human auditory system and their implications for both conventional stereo and modern immersive audio formats. We will investigate the theory of how simple differences in geometry can change the sound profile localization process, consider the complexity of modeling the acoustics of spatial hearing, and unpack data collected from individuals in practice. Audio demonstrations of these phenomena will be given as we examine some of the tools used to simulate spatialization in headphone playback. |

3/25/24 | Daniel Tjie, Alumnus Recording: | Working Full-Time While Going to Graduate School | Daniel Tjie graduated in May 2017 with a Bachelor of Mathematics and Bachelor of Economics from Ithaca College. Daniel has been working as an Economic Database Manager at Haver Analytics in New York City for the past 6 years. While working full-time, Daniel earned his MBA from Fairleigh Dickinson University. Daniel will go discuss the financial process and the experience and answer any questions students may have. On ZOOM (and simulcast with cookies in Williams 320): https://ithaca.zoom.us/j/91269933675?pwd=QkY4TGlFZ0IvSytrZlQ1VDhBUndYUT09 Meeting ID: 912 6993 3675 |

4/22/24 | Susanne Pumpluen, University of Nottingham Recording: | Nonassociative algebras, applications to coding theory, and how I got there… | It is well known that the complex numbers can be constructed from the real numbers: they can be viewed as pairs of real numbers, together with a suitable multiplication. We will look at this construction and play with it a bit. What happens if we use the same multiplication, or a similar one, and instead multiply pairs of complex numbers? In the process we introduce the concept of algebras, which are vector spaces with some multiplication on them that allows two elements in the vector space to be "multiplied" with each other. We will meet quaternion algebras, cyclic algebras, and generalisations of them. Some of these algebras are employed to build codes used for wireless digital data transmission, e.g. in mobile phones, laptops or portable TVs, or in other areas of coding theory. We will explain how some of these codes work. I will also tell you a bit about how I ended up studying these particular nonassociative algebras, and their applications, over the last 10 years. On ZOOM (and simulcast with cookies in Williams 320): https://ithaca.zoom.us/j/91269933675?pwd=QkY4TGlFZ0IvSytrZlQ1VDhBUndYUT09 Meeting ID: 912 6993 3675 |