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Daniel Gatica-Perez

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Publications associées (115)

Evaluation of 1-Year in-Home Monitoring Technology by Home-Dwelling Older Adults, Family Caregivers, and Nurses

Philipp Buluschek, Daniel Gatica-Perez, Bruno Pais

Introduction:Population aging is increasing the needs and costs of healthcare. Both frailty and the chronic diseases affecting older people reduce their ability to live independently. However, most older people prefer to age in their own homes. New develop ...

2020

Protecting Mobile Food Diaries from Getting too Personal

Daniel Gatica-Perez, Lakmal Buddika Meegahapola

Smartphone applications that use passive sensing to support human health and well-being primarily rely on: (a) generating low-dimensional representations from high-dimensional data streams; (b) making inferences regarding user behavior; and (c) using those ...

Association for Computing Machinery2020

Learning Urban Nightlife Routines from Mobile Data

Daniel Gatica-Perez, Thanh Trung Phan

The use of smartphone sensing for public health studies is appealing to understand routines. We present an approach to learn nightlife routines in a smartphone sensing dataset volunteered by 184 young people (1586 weekend nights with location data captured ...

ACM2020

BookTubing Across Regions: Examining Differences based on Nonverbal and Verbal Cues

Daniel Gatica-Perez, Dinesh Babu Jayagopi

BookTubers are a rapidly growing community in YouTube who shares content related to books. Previous literature has addressed problems related to automatically analyzing opinions and mood of video logs (vlogs) as a generic category in YouTube. Unfortunately ...

ASSOC COMPUTING MACHINERY2019

Mi Casa es su Casa? Examining Airbnb Hospitality Exchange Practices in a Developing Economy

Laurent Son Nguyen, Daniel Gatica-Perez

2019

Drinks & Crowds: Characterizing Alcohol Consumption through Crowdsensing and Social Media

Daniel Gatica-Perez, Skanda Muralidhar, Thanh Trung Phan

2019

My Own Private Nightlife: Understanding Youth Personal Spaces from Crowdsourced Video

Daniel Gatica-Perez, Thanh Trung Phan

2019

Discovering Eating Routines in Context with a Smartphone App

Daniel Gatica-Perez, Joan Isaac Biel Tres

In everyday life, eating follows patterns and occurs in context. We present an approach to discover daily eating routines of a population following a multidimensional representation of eating episodes, using data collected with the Bites'n'Bits smartphone ...

ASSOC COMPUTING MACHINERY2019

Validity of pervasive computing based continuous physical activity assessment in community-dwelling old and oldest-old

Philipp Buluschek, Daniel Gatica-Perez, Bruno Pais

In older adults, physical activity is crucial for healthy aging and associated with numerous health indicators and outcomes. Regular assessments of physical activity can help detect early health-related changes and manage physical activity targeted interve ...

Nature Research2019

How to Tell Ancient Signs Apart? Recognizing and Visualizing Maya Glyphs with CNNs

Jean-Marc Odobez, Daniel Gatica-Perez, Gülcan Can

Thanks to the digital preservation of cultural heritage materials, multimedia tools (e.g., based on automatic visual processing) considerably ease the work of scholars in the humanities and help them to perform quantitative analysis of their data. In this ...

2018

Vlogging Over Time: Longitudinal Impressions and Behavior in YouTube

Daniel Gatica-Perez, Dinesh Babu Jayagopi, Dairazalia Sanchez Cortes

YouTube vlogging, as a popular genre of ubiquitous social video, engages people in entertainment, civic, and social activities. Although several aspects of vlogging have been studied in media studies and multimedia analysis, the longitudinal angle of vlogg ...

ASSOC COMPUTING MACHINERY2018

Facing Employers and Customers: What Do Gaze and Expressions Tell About Soft Skills?

Jean-Marc Odobez, Daniel Gatica-Perez, Rémy Alain Siegfried, Skanda Muralidhar

Eye gaze and facial expressions are central to face-to-face social interactions. These behavioral cues and their connections to first impressions have been widely studied in psychology and computing literature, but limited to a single situation. Utilizing ...

ASSOC COMPUTING MACHINERY2018

Ambiance in Social Media Venues: Visual Cue Interpretation by Machines and Crowds

Daniel Gatica-Perez, Yassir Benkhedda, Gülcan Can

We study the perception of ambiance of places captured in social media images by both machines and crowdworkers. This task is challenging due to the subjective nature of the ambiance construct as well as the large variety in layout, style, and visual chara ...

IEEE2018

A Tale of Two Interactions: Inferring Performance in Hospitality Encounters from Cross-Situation Social Sensing

Daniel Gatica-Perez, Skanda Muralidhar

2018

Looking South: Learning Urban Perception in Developing Cities

Daniel Gatica-Perez, Darshan Santani

2018

Check Out This Place: Inferring Ambiance from Airbnb Photos

Laurent Son Nguyen, Daniel Gatica-Perez

Airbnb is changing the landscape of the hospitality industry. For guests, the process of selecting a place to stay is a type of zero-acquaintance situation, and to this day little is known about the inferences that guests make about Airbnb listings. Enviro ...

2018

Maya Codical Glyph Segmentation: A Crowdsourcing Approach

Jean-Marc Odobez, Daniel Gatica-Perez, Gülcan Can

This paper focuses on the crowd-annotation of an ancient Maya glyph dataset derived from the three ancient codices that survived up to date. More precisely, non-expert annotators are asked to segment glyph-blocks into their constituent glyph entities. As a ...

2018

DrinkSense: Characterizing Youth Drinking Behavior using Smartphones

Daniel Gatica-Perez, Darshan Santani

Alcohol consumption is the number one risk factor for morbidity and mortality among young people. In late adolescence and early adulthood, excessive drinking and intoxication are more common than in any other life period, increasing the risk of adverse phy ...

2018

Modeling Dyadic and Group Impressions with Inter-Modal and Inter-Person Features

Laurent Son Nguyen, Daniel Gatica-Perez, Oya Aran

This article proposes a novel feature-extraction framework for inferring impression personality traits, emergent leadership skills, communicative competence, and hiring decisions. The proposed framework extracts multimodal features, describing each partici ...

2018

Insiders and Outsiders: Comparing Urban Impressions between Population Groups

Daniel Gatica-Perez, Darshan Santani

There is a growing interest in social and urban computing to employ crowdsourcing as means to gather impressions of urban perception for indoor and outdoor environments. Previous studies have established that reliable estimates of urban perception can be o ...

ACM2017

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