The CWIT Treasure Chest is a prize-based program where you earn points for attending CWIT events and participating in different initiatives. These points will be counted up at the end of the semester and redeemable for different prizes. Check out the flyers below for more information on how to earn points and what prizes you could redeem them for at the end of the semester!

Earning Points

25 points:

• Fill out event/feedback surveys
• Apply to be a CWIT Lead (Spring only)
• Apply to be a CWIT Peer Mentor (Spring only)

Howdy, my name is Alex Getachew (he, his) and I am the Veteran Services Graduate Assistant here at Off Campus Student Services

I am currently a Ph.D. student in Public Policy. I enjoy various hobbies, interests, and passions, such as choral singing, poetry, philosophy, volunteering (in and out of my community), making new friends, and last but not least, imparting corny humor to unsuspecting humans.
My goal is to offer student veterans (and students who are dependents of veterans) opportunities to connect with all the resources UMBC has to offer them. I endeavor to make you feel welcome anytime you walk into our office for any reason whatsoever. Whether that be to inquire about a specific issue, drop in to say hello, have a quick chat, or even to make suggestions for future veterans’ related programming.
I will be on-campus in the office on Tuesday and Thursday this semester. You can reach me by email - agetach1@umbc.edu or Veterans@umbc.edu

Hello, my name is Grace De Oro (she, her) and I am the Adult Learner Graduate Assistant for Off-Campus Student Services. This August I celebrated 2 years of working alongside the Staff in OCSS.
I am a Ph.D. student in the School of Public Policy and recently graduated in May 2019 from UMBC with my Masters in Public Policy with a concentration in Environmental Policy. I will be hopefully defending my dissertation proposal this year. I am currently focusing my research on nonprofit organizations’ resilience through the COVID-19 Pandemic as well as their relationship to government. I commute from Woodbine, MD (Western Howard County), where I live on a small  5-acre farmincluding cats, horses, a miniature donkey, chickens, ducks, goats, snakes, and many, many dogs.
I will be on-campus in the office on Mondays and Wednesday this semester and working from home on Tuesdays. You can always reach me by email - degrac1@umbc.edu or Adultlearners@umbc.edu

Necessary and sufficient regressor conditions for the global asymptotic stability of recursive least squares

Abstract

In recursive least squares (RLS), a persistently exciting (PE) regressor guarantees global asymptotic stability (GAS) of the estimation error relative to the zero equilibrium, and hence convergence of the parameter estimates to their true values. It is known, however, that PE is sufficient but not necessary for GAS, and thus GAS might be achieved even if the regressor is not PE. Since analyses based on PE are ubiquitous in the recursive estimation literature, the existence of non-PE regressors that ensure GAS raises the question of how PE can be directly generalized into a necessary and sufficient condition for the GAS of RLS, and whether or not such a generalization would provide a simple characterization of non-PE regressors for which RLS is GAS. In this paper, we introduce WPE, a direct generalization of PE that is necessary and sufficient for GAS, and explain how it can be understood as a “non-uniform” extension of PE to specific classes of summation windows and lower bound sequences. Next, we show that WPE is equivalent to a condition that emerges from extending certain proofs of non-negative series divergence, such as Oresme’s divergence proof for the harmonic series, to sequences of real symmetric positive-semidefinite matrices.

Read the article here.