ACM ​Faculty Talk

Mixed Membership Word Embeddings for Computational Social Science

​Dr. James Foulds, Information Systems, UMBC

12:00-1:00pm ​Thursday​,​ 5 ​April​ 2018, ITE​459,​ UMBC

Word embeddings improve the performance of natural language processing (NLP) systems by revealing the hidden structural relationships between words. Despite their success in many applications, word embeddings have seen very little use in computational social science NLP tasks, presumably due to their reliance on big data, and to a lack of interpretability. I propose a probabilistic model-based word embedding method which can recover interpretable embeddings, without big data. The key insight is to leverage mixed membership modeling, in which global representations are shared, but individual entities (i.e., dictionary words) are free to use these representations to uniquely differing degrees. I show how to train the model using a combination of state-of-the-art training techniques for word embeddings and topic models. The experimental results show an improvement in predictive language modeling of up to 63% in MRR over the skip-gram, and demonstrate that the representations are beneficial for supervised learning. I illustrate the interpretability of the models with computational social science case studies on State of the Union addresses and NIPS articles.

James (a.k.a. Jimmy) Foulds is an assistant professor in the Department of Information Systems at UMBC. His research interests are in both applied and foundational machine learning, focusing on probabilistic latent variable models and the inference algorithms to learn them from data. His work aims to promote the practice of latent variable modeling for multidisciplinary research in areas including computational social science and the digital humanities. He earned his Ph.D. in computer science at the University of California, Irvine, and was a postdoctoral scholar at the University of California, Santa Cruz, followed by the University of California, San Diego. His master’s and bachelor’s degrees were earned with first class honours at the University of Waikato, New Zealand, where he also contributed to the Weka data mining system.

The post 🗣 talk: Mixed Membership Word Embeddings for Computational Social Science, 12pm Thr 4/5 appeared first on Department of Computer Science and Electrical Engineering.

Hey all,

Due to the time window issued to us by the campus print shop we need everyone that wants a nametag to VERIFY their RSVP sign-up by 9:00 AM tomorrow morning. The printshop has many other orders to fulfill and if we want ISCOM's done as well, we need you to verify ASAP. Please do so by

·       Typing ‘YES’ or ‘NO’ next to your name in the Googlesheet, linked above

OR       

·       If you can’t find yourself, ADD YOUR NAME and type ‘YES’ or ‘NO’!

If you are not able to verify by then, you are still welcome to the event- we just won't be able to give you a nametag to help you stand out from the 130 other students attending (new set of unverified RSVP'd people have been added to the G-Sheet).

No one else will be issuing nametags to help students stand out, so please verify, wear business casual, and feel free to attend as many events as you can!

See you there,

Your ISCOM Executive Board

The forecast looks dreary but ice cream is yummy rain or shine! Just pop in to the Ice Cream Cottage and grab some cappuccino crunch or some chocolate moose tracks, you earned it! Well, maybe you didn't, but we'll let it slide just this once. A portion of your purchase will help a community in need get better access to safe drinking water! The Ice Cream Cottage located super close to campus at 

and they're open from 11am-9:30pm

You don't need a flier or anything, you can tell the people you're there for the fundraiser. (but you don't have to say anything)

April is Sexual Assault Awareness Month, and the Women’s Center is hosting its 6th consecutive Take Back the Night on Thursday, April 12th. Over the years, we’ve had a lot of questions about what Take Back the Night exactly is, why it looks the way it does, and how students can get involved. To help get those questions answered we started the “What You Need to Know” series focused on TBTN last year and are continuing on the tradition, so stay tuned for more posts over the next couple of weeks. This blog focuses on the evening’s campus march against sexual violence.

1,2,3,4 WE WON’T TAKE IT ANYMORE

 5,6,7,8 NO MORE VIOLENCE! NO MORE HATE!

As a survivor of sexual assault, the Take Back The Night march reminds me that I’m not alone.

Mariana De Matos Medeiros, ’16, and former student staff member at the Women’s Center, said “To me, having the opportunity to speak and march at TBTN last year reminded me that I am not alone and that I can stand in my power to speak about my experience. It took me 3 years to finally speak about my assault and one of the very first times was at TBTN last year. Seeing so many gathered to support allowed me to speak and speaking has allowed me to heal.”

It can be easy to blame yourself, isolate yourself, and feel like you’re the only person struggling with your healing; However, the march lets you connect with people who support you and believe you.

Sarah Lilly, a 2016 and 2017 Take Back The Night student leader says “Marching is us showing that solidarity is a verb, and it brings me great pride to feel so supported by my local UMBC community and to see the unconditional support for everyone else in our community.”

In an open letter in her school’s newspaper, survivor and student activist, Angie Epifano, recounted the aftermath of her sexual assault, namely her experience with institutional betrayal. She ended the letter with, “Silence has the rusty taste of shame.” Due to rape culture, victim blaming, a lack of support for survivors, and more, it is understandable that many survivors do not disclose their experience and sexual assault is rarely spoke of in public.

Much like the Baltimore-based Monument Quilt is creating and demanding public space for survivors to heal, Take Back the Night demands for space in which we will not be shamed into silence. Activists like Angie, the Monument Quilt creators, and YOU during the march are creating a new culture where survivors are publicly supported, rather than publicly shamed. Come see the Monument Quilt at UMBC on Tuesday, April 17th.

Here’s some helpful information about the campus march against sexual violence to those attending Take Back the Night at UMBC: 

• The survivor speak-out is intended to center the voices and experience of survivors (of all identities) of sexual violence. The speak-out is for allies to listen and survivors to break their silence but the march is for EVERYONE to GET LOUD! 
• We encourage individuals and groups to make rally signs ahead of time. Signs are a great way to show your solidarity and support while also representing your student orgs, res hall communities, and frats/sororities.
• We’ll line everyone up in the march in waves. Survivors wanting to march up front with other survivors are invited to line up first along with other community members needed to take an accessible route march. Everyone else will then line up as survivors begin to march towards the south exit of The Commons.
• As we march, walk slowly and stay together. Try to avoid large gaps in the line.
• Due to construction, there will be a change in the march route this year. As we make out way through the new route we will stop midway through the march and hold our first Survivor Circle.
  • The Survivor Circle is a chance for survivors who may or may not have shared their story during the speak out to be recognized, come together, and be surrounded in support and healing by those attending the march. This is an opportunity for those who identify as survivors to come together without having to speak out or share their story if they do not wish to do so.
• The march will end back on Main Street where the space will be ready for the evening’s resource fair and craftivism. As you’re heading back into The Commons, come all the way into Main Street so everyone else behind you can get into the space as well.
• There will be one more chance to share your experience as a survivor post-march at a survivor discussion group led by the student organization We Believe You in the Women’s Center. (This event will be private and for survivors only).
• Counselors-On-Call will be available throughout the evening. Any one needing additional support or simply needs to take a break are invited to visit the self-care station that will be set up in the Commuter Lounge.

For more information about UMBC’s TBTN (check out Facebook, Instagram, and Twitter too by searching the hashtag #UMBCTBTN):

• Stop by the Women’s Center the week leading up to TBTN to make a rally sign for the march on April 9th, 10th, or 11th.
• A blog post about UMBC’s 2005 TBTN march written by alum, Dr. Grollman.
• Speak: Knowing a Survivor Without Knowing Their Story – a blog post on cultivating a survivor-responsive campus
• Register for and attend an upcoming Supporting Survivors of Sexual Violence workshop. Click here for more details on the students workshop.
• The Women’s Center 2017 TBTN roundup
  

Stay tuned for the next installment of what you need to know about TBTN 2018!