Getting closer: an empirical investigation of the proximity of user to their smart phones. - Anind K. Dey; Katarzyna Wac; Denzil Ferreira; Kevin Tassini; Jin-Hyuk Hong; Julian Ramos 001 (UbiComp, 2011)

Improving Users' Consistency When Recalling Location Sharing Preferences. - Jayant Venkatanathan; Denzil Ferreira; Michael Benisch; Jialiu Lin; Evangelos Karapanos; Vassilis Kostakos; Norman M. Sadeh; Eran Toch (INTERACT (1), 2011)

Understanding Human-Smartphone Concerns: A Study of Battery Life. - Denzil Ferreira; Anind K. Dey; Vassilis Kostakos (Pervasive, 2011)

UbiMI: ubiquitous mobile instrumentation. - Denzil Ferreira; Emiliano Miluzzo; Jonna Häkkilä; Tom Lovett; Vassilis Kostakos (UbiComp, 2012)

Web tool for traffic engineers: direct manipulation and visualization of vehicular traffic using Google maps. - Tomi Juntunen; Vassilis Kostakos; Mikko Perttunen; Denzil Ferreira (MindTrek, 2012)

Testdroid: automated remote UI testing on Android. - Jouko Kaasila; Denzil Ferreira; Vassilis Kostakos; Timo Ojala (MUM, 2012)

Towards multi-application public interactive displays. - Tomas Lindén; Tommi Heikkinen; Vassilis Kostakos; Denzil Ferreira; Timo Ojala (PerDis, 2012)

Lessons Learned from Large-Scale User Studies: Using Android Market as a Source of Data. - Denzil Ferreira; Vassilis Kostakos; Anind K. Dey (Int. J. Mob. Hum. Comput. Interact., 2012)

Revisiting human-battery interaction with an interactive battery interface. - Denzil Ferreira; Eija Ferreira; Jorge Gonçalves 001; Vassilis Kostakos; Anind K. Dey (UbiComp, 2013)

Ubiquitous mobile instrumentation. - Denzil Ferreira; Christian Koehler 002; Evangelos Karapanos; Vassilis Kostakos (UbiComp (Adjunct Publication), 2013)

Crowdsourcing on the spot: altruistic use of public displays, feasibility, performance, and behaviours. - Jorge Gonçalves 001; Denzil Ferreira; Simo Hosio; Yong Liu 010; Jakob Rogstadius; Hannu Kukka; Vassilis Kostakos (UbiComp, 2013)

HotCity: enhancing ubiquitous maps with social context heatmaps. - Andreas Komninos; Jeries Besharat; Denzil Ferreira; John D. Garofalakis (MUM, 2013)

AWARE:a mobile context instrumentation middleware to collaboratively understand human behavior. - Denzil Ferreira (2013)

Game of words: tagging places through crowdsourcing on public displays. - Jorge Gonçalves 001; Simo Hosio; Denzil Ferreira; Vassilis Kostakos (Conference on Designing Interactive Systems, 2014)

CHI 1994-2013: mapping two decades of intellectual progress through co-word analysis. - Yong Liu 010; Jorge Gonçalves 001; Denzil Ferreira; Bei Xiao; Simo Hosio; Vassilis Kostakos (CHI, 2014)

Projective testing of diurnal collective emotion. - Jorge Gonçalves 001; Pratyush Pandab; Denzil Ferreira; Mohammad Ghahramani; Guoying Zhao 001; Vassilis Kostakos (UbiComp, 2014)

Pulse: low bitrate wireless magnetic communication for smartphones. - Weiwei Jiang 001; Denzil Ferreira; Jani Ylioja; Jorge Gonçalves 001; Vassilis Kostakos (UbiComp, 2014)

Identity crisis of ubicomp?: mapping 15 years of the field's development and paradigm change. - Yong Liu 010; Jorge Gonçalves 001; Denzil Ferreira; Simo Hosio; Vassilis Kostakos (UbiComp, 2014)

Contextual experience sampling of mobile application micro-usage. - Denzil Ferreira; Jorge Gonçalves 001; Vassilis Kostakos; Louise Barkhuus; Anind K. Dey (Mobile HCI, 2014)

Mobile cloud storage: a contextual experience. - Karel Vandenbroucke; Denzil Ferreira; Jorge Gonçalves 001; Vassilis Kostakos; Katrien De Moor (Mobile HCI, 2014)

Situated crowdsourcing using a market model. - Simo Hosio; Jorge Gonçalves 001; Vili Lehdonvirta; Denzil Ferreira; Vassilis Kostakos (UIST, 2014)

The curse of quantified-self: an endless quest for answers. - Niels van Berkel; Chu Luo; Denzil Ferreira; Jorge Gonçalves 001; Vassilis Kostakos (UbiComp/ISWC Adjunct, 2015)

Bazaar: a situated crowdsourcing market. - Jorge Gonçalves 001; Simo Hosio; Denzil Ferreira; Theodoros Anagnostopoulos; Vassilis Kostakos (UbiComp/ISWC Adjunct, 2015)

Revisitation analysis of smartphone app use. - Simon L. Jones; Denzil Ferreira; Simo Hosio; Jorge Gonçalves 001; Vassilis Kostakos (UbiComp, 2015)

Understanding the Challenges of Mobile Phone Usage Data. - Karen Church; Denzil Ferreira; Nikola Banovic 001; Kent Lyons (MobileHCI, 2015)

Securacy: an empirical investigation of Android applications' network usage, privacy and security. - Denzil Ferreira; Vassilis Kostakos; Alastair R. Beresford; Janne Lindqvist; Anind K. Dey (WISEC, 2015)

AWARE: mobile context instrumentation framework. - Denzil Ferreira; Vassilis Kostakos; Anind K. Dey (Frontiers ICT, 2015)

The Rise of Ubiquitous Instrumentation. - Vassilis Kostakos; Denzil Ferreira (Frontiers ICT, 2015)

A Systematic Assessment of Smartphone Usage Gaps. - Niels van Berkel; Chu Luo; Theodoros Anagnostopoulos; Denzil Ferreira; Jorge Gonçalves 001; Simo Hosio; Vassilis Kostakos (CHI, 2016)

Monetary Assessment of Battery Life on Smartphones. - Simo Hosio; Denzil Ferreira; Jorge Gonçalves 001; Niels van Berkel; Chu Luo; Muzamil Ahmed; Huber Flores; Vassilis Kostakos (CHI, 2016)

3rd international workshop on ubiquitous mobile instrumentation. - Denzil Ferreira; Tadashi Okoshi; Yuuki Nishiyama; Christian Koehler 002; Jung Wook Park; Andrés Lucero (UbiComp Adjunct, 2016)

Social-aware device-to-device communication: a contribution for edge and fog computing? - Huber Flores; Denzil Ferreira; Chu Luo; Vassilis Kostakos; Pan Hui 001; Rajesh Sharma; Sasu Tarkoma; Yong Li 008 (UbiComp Adjunct, 2016)

Modelling smartphone usage: a markov state transition model. - Vassilis Kostakos; Denzil Ferreira; Jorge Gonçalves 001; Simo Hosio (UbiComp, 2016)

How to validate mobile crowdsourcing design? leveraging data integration in prototype testing. - Chu Luo; Miikka Kuutila; Simon Klakegg; Denzil Ferreira; Huber Flores; Jorge Gonçalves 001; Vassilis Kostakos; Mika Mäntylä (UbiComp Adjunct, 2016)

Contact lingo keyboard. - Ahsan Manzoor; Denzil Ferreira (UbiComp Adjunct, 2016)

Online?: a study of smartphone Internet availability. - Denzil Ferreira; Huber Flores; Karel Vandenbroucke; Aku Visuri (MUM, 2016)

Indoor light scavenging on smartphones. - Denzil Ferreira; Christian Schuss; Chu Luo; Jorge Gonçalves 001; Vassilis Kostakos; Timo Rahkonen (MUM, 2016)

Cyclist-aware traffic lights through distributed smartphone sensing. - Theodoros Anagnostopoulos; Denzil Ferreira; Alexander Samodelkin; Muzamil Ahmed; Vassilis Kostakos (Pervasive Mob. Comput., 2016)

Practical simulation of virtual crowds using points of interest. - Matti Pouke; Jorge Gonçalves 001; Denzil Ferreira; Vassilis Kostakos (Comput. Environ. Urban Syst., 2016)

Human Sensors on the Move. - Denzil Ferreira; Vassilis Kostakos; Immanuel Schweizer (Participatory Sensing, Opinions and Collective Awareness, 2017)

Human Sensors. - Vassilis Kostakos; Jakob Rogstadius; Denzil Ferreira; Simo Hosio; Jorge Gonçalves 001 (Participatory Sensing, Opinions and Collective Awareness, 2017)

Informing Caregivers Through an Assistive Tool: An Investigation of Elderly Care Metrics. - Simon Klakegg; Niels van Berkel; Aku Visuri; Chu Luo; Jorge Gonçalves 001; Simo Hosio; Hanna-Leena Huttunen; Denzil Ferreira (BCS HCI, 2017)

Challenges of Quantified-Self: Encouraging Self-Reported Data Logging During Recurrent Smartphone Usage. - Aku Visuri; Niels van Berkel; Chu Luo; Jorge Gonçalves 001; Denzil Ferreira; Vassilis Kostakos (BCS HCI, 2017)

Quantifying Sources and Types of Smartwatch Usage Sessions. - Aku Visuri; Zhanna Sarsenbayeva; Niels van Berkel; Jorge Gonçalves 001; Reza Rawassizadeh; Vassilis Kostakos; Denzil Ferreira (CHI, 2017)

Towards altruistic data quality assessment for mobile sensing. - Eija Ferreira; Denzil Ferreira (UbiComp/ISWC Adjunct, 2017)

Designing a context-aware assistive infrastructure for elderly care. - Simon Klakegg; Niels van Berkel; Aku Visuri; Hanna-Leena Huttunen; Simo Hosio; Chu Luo; Jorge Gonçalves 001; Denzil Ferreira (UbiComp/ISWC Adjunct, 2017)

Vision-based happiness inference: a feasibility case-study. - Zhanna Sarsenbayeva; Denzil Ferreira; Niels van Berkel; Chu Luo; Mikko Vaisanen; Vassilis Kostakos; Jorge Gonçalves 001 (UbiComp/ISWC Adjunct, 2017)

UbiMI'17: ubiquitous mobile instrumentation. - Aku Visuri; Denzil Ferreira; Susanna Pirttikangas; Vassilis Kostakos; Kåre Synnes; Janne Lindqvist; Yuuki Nishiyama (UbiComp/ISWC Adjunct, 2017)

Smartphone detection of collapsed buildings during earthquakes. - Aku Visuri; Zeyun Zhu; Denzil Ferreira; Shin'ichi Konomi; Vassilis Kostakos (UbiComp/ISWC Adjunct, 2017)

Understanding elderly care: a field-study for designing future homes. - Hanna-Leena Huttunen; Simon Klakegg; Niels van Berkel; Aku Visuri; Denzil Ferreira; Raija Halonen (iiWAS, 2017)

Predicting interruptibility for manual data collection: a cluster-based user model. - Aku Visuri; Niels van Berkel; Chu Luo; Jorge Gonçalves 001; Denzil Ferreira; Vassilis Kostakos (MobileHCI, 2017)

Exploring mobile ad formats to increase brand recollection and enhance user experience. - Aku Visuri; Simo Hosio; Denzil Ferreira (MUM, 2017)

Are Smartphones Ubiquitous?: An in-depth survey of smartphone adoption by seniors. - Anabela Berenguer; Jorge Gonçalves 001; Simo Hosio; Denzil Ferreira; Theodoros Anagnostopoulos; Vassilis Kostakos (IEEE Consumer Electron. Mag., 2017)

Detecting Drinking Episodes in Young Adults Using Smartphone-based Sensors. - Sangwon Bae 001; Denzil Ferreira; Brian Suffoletto; Juan C. Puyana; Ryan Kurtz; Tammy Chung; Anind K. Dey (Proc. ACM Interact. Mob. Wearable Ubiquitous Technol., 2017)

TestAWARE: A Laboratory-Oriented Testing Tool for Mobile Context-Aware Applications. - Chu Luo; Miikka Kuutila; Simon Klakegg; Denzil Ferreira; Huber Flores; Jorge Gonçalves 001; Mika Mäntylä; Vassilis Kostakos (Proc. ACM Interact. Mob. Wearable Ubiquitous Technol., 2017)

Donating Context Data to Science: The Effects of Social Signals and Perceptions on Action-Taking. - Yong Liu 010; Denzil Ferreira; Jorge Gonçalves 001; Simo Hosio; Pratyush Pandab; Vassilis Kostakos (Interact. Comput., 2017)

Where's everybody? Comparing the use of heatmaps to uncover cities' tacit social context in smartphones and pervasive displays. - Andreas Komninos; Jeries Besharat; Denzil Ferreira; John D. Garofalakis; Vassilis Kostakos (J. Inf. Technol. Tour., 2017)

Social-aware hybrid mobile offloading. - Huber Flores; Rajesh Sharma; Denzil Ferreira; Vassilis Kostakos; Jukka Manner; Sasu Tarkoma; Pan Hui 001; Yong Li 008 (Pervasive Mob. Comput., 2017)

Environmental exposure assessment using indoor/outdoor detection on smartphones. - Theodoros Anagnostopoulos; Juan Camilo Garcia; Jorge Gonçalves 001; Denzil Ferreira; Simo Hosio; Vassilis Kostakos (Pers. Ubiquitous Comput., 2017)

Enabling Mid-air Browser Interaction with Leap Motion. - Assam Boudjelthia; Sofeem Nasim; Janne Eskola; Joshua Muyiwa Adeegbe; Oula Hourula; Simon Klakegg; Denzil Ferreira (UbiComp/ISWC Adjunct, 2018)

STOP: A Smartphone-based Game for Parkinson's Disease Medication Adherence. - Valerii Kan; Dorina Rajanen; Kennedy Opoku Asare; Denzil Ferreira (UbiComp/ISWC Adjunct, 2018)

Ubiquitous Mobile Sensing: Behaviour, Mood, and Environment. - Aku Visuri; Kennedy Opoku Asare; Elina Kuosmanen; Yuuki Nishiyama; Denzil Ferreira; Zhanna Sarsenbayeva; Jorge Gonçalves 001; Niels van Berkel; Greg Wadley; Vassilis Kostakos; Sarah Clinch; Oludamilare Matthews; et al. (UbiComp/ISWC Adjunct, 2018)

S3: environmental fingerprinting with a credit card-sized NFC powered sensor board. - Kennedy Opoku Asare; Tore Leikanger; Christian Schuss; Simon Klakegg; Aku Visuri; Denzil Ferreira (MobileHCI Adjunct, 2018)

The gravity of thought: exploring positively surprising interactions. - Yazan Barhoush; Miikka Mustonen; Denzil Ferreira; Georgi V. Georgiev; Daniel Nguyen; Matti Pouke (MobileHCI Adjunct, 2018)

Senbay: a platform for instantly capturing, integrating, and restreaming of synchronized multiple sensor-data stream. - Yuuki Nishiyama; Anind K. Dey; Denzil Ferreira; Takuro Yonezawa; Jin Nakazawa (MobileHCI Adjunct, 2018)

Mobile-based Monitoring of Parkinson's Disease. - Elina Kuosmanen; Valerii Kan; Aku Visuri; Julio Vega; Yuuki Nishiyama; Anind K. Dey; Simon Harper; Denzil Ferreira (MUM, 2018)

Identifying bottlenecks in work processes: Elderly care. - Hanna-Leena Huttunen; Raija Halonen; Denzil Ferreira (SeGAH, 2018)

The Experience Sampling Method on Mobile Devices. - Niels van Berkel; Denzil Ferreira; Vassilis Kostakos (ACM Comput. Surv., 2018)

Assisted Medication Management in Elderly Care Using Miniaturised Near-Infrared Spectroscopy. - Simon Klakegg; Jorge Gonçalves 001; Chu Luo; Aku Visuri; Alexey Popov; Niels van Berkel; Zhanna Sarsenbayeva; Vassilis Kostakos; Simo Hosio; Scott Savage; Alexander Bykov; Igor V. Meglinski; et al. (Proc. ACM Interact. Mob. Wearable Ubiquitous Technol., 2018)

Context-Informed Scheduling and Analysis: Improving Accuracy of Mobile Self-Reports. - Niels van Berkel; Jorge Gonçalves 001; Peter Koval; Simo Hosio; Tilman Dingler; Denzil Ferreira; Vassilis Kostakos (CHI, 2019)

Towards early detection of depression through smartphone sensing. - Kennedy Opoku Asare; Aku Visuri; Denzil Ferreira (UbiComp/ISWC Adjunct, 2019)

Measuring Parkinson's disease motor symptoms with smartphone-based drawing tasks. - Elina Kuosmanen; Valerii Kan; Aku Visuri; Assam Boudjelthia; Lokmane Krizou; Denzil Ferreira (UbiComp/ISWC Adjunct, 2019)

Challenges of Parkinson's Disease: User Experiences with STOP. - Elina Kuosmanen; Valerii Kan; Julio Vega; Aku Visuri; Yuuki Nishiyama; Anind K. Dey; Simon Harper; Denzil Ferreira (MobileHCI, 2019)

Effect of experience sampling schedules on response rate and recall accuracy of objective self-reports. - Niels van Berkel; Jorge Gonçalves 001; Lauri Lovén; Denzil Ferreira; Simo Hosio; Vassilis Kostakos (Int. J. Hum. Comput. Stud., 2019)

Energy-efficient prediction of smartphone unlocking. - Chu Luo; Aku Visuri; Simon Klakegg; Niels van Berkel; Zhanna Sarsenbayeva; Antti Möttönen; Jorge Gonçalves 001; Theodoros Anagnostopoulos; Denzil Ferreira; Huber Flores; Eduardo Velloso; Vassilis Kostakos (Pers. Ubiquitous Comput., 2019)

Continuous Authentication of Smartphones Based on Application Usage. - Upal Mahbub; Jukka Komulainen; Denzil Ferreira; Rama Chellappa (IEEE Trans. Biom. Behav. Identity Sci., 2019)

Learning-Assisted Optimization in Mobile Crowd Sensing: A Survey. - Jiangtao Wang 001; Yasha Wang; Daqing Zhang 001; Jorge Gonçalves 001; Denzil Ferreira; Aku Visuri; Sen Ma (IEEE Trans. Ind. Informatics, 2019)

MEEC: First Workshop on Momentary Emotion Elicitation and Capture. - Abdallah El Ali; Monica Perusquía-Hernández; Pete Denman; Yomna Abdelrahman; Mariam Hassib; Alexander Meschtscherjakov; Denzil Ferreira; Niels Henze (CHI Extended Abstracts, 2020)

Let's Draw: Detecting and Measuring Parkinson's Disease on Smartphones. - Elina Kuosmanen; Valerii Kan; Aku Visuri; Simo Hosio; Denzil Ferreira (CHI, 2020)

IOS Crowd-Sensing Won't Hurt a Bit!: AWARE Framework and Sustainable Study Guideline for iOS Platform. - Yuuki Nishiyama; Denzil Ferreira; Yusaku Eigen; Wataru Sasaki; Tadashi Okoshi; Jin Nakazawa; Anind K. Dey; Kaoru Sezaki (HCI (23), 2020)

Using iOS for inconspicuous data collection: a real-world assessment. - Yuuki Nishiyama; Denzil Ferreira; Wataru Sasaki; Tadashi Okoshi; Jin Nakazawa; Anind K. Dey; Kaoru Sezaki (UbiComp/ISWC Adjunct, 2020)

When phones get personal: Predicting Big Five personality traits from application usage. - Ella Peltonen; Parsa Sharmila; Kennedy Opoku Asare; Aku Visuri; Eemil Lagerspetz; Denzil Ferreira (Pervasive Mob. Comput., 2020)

Assessing MyData Scenarios: Ethics, Concerns, and the Promise. - Andy Alorwu; Saba Kheirinejad; Niels van Berkel; Marianne Kinnula; Denzil Ferreira; Aku Visuri; Simo Hosio (CHI, 2021)

Me in the Wild: An Exploratory Study Using Smartphones to Detect the Onset of Depression. - Kennedy Opoku Asare; Aku Visuri; Julio Vega; Denzil Ferreira (MobiHealth, 2021)

Understanding usage style transformation during long-term smartwatch use. - Aku Visuri; Niels van Berkel; Jorge Gonçalves 001; Reza Rawassizadeh; Denzil Ferreira; Vassilis Kostakos (Pers. Ubiquitous Comput., 2021)

How Does Sleep Tracking Influence Your Life?: Experiences from a Longitudinal Field Study with a Wearable Ring. - Elina Kuosmanen; Aku Visuri; Saba Kheirinejad; Niels van Berkel; Heli Koskimäki; Denzil Ferreira; Simo Hosio (Proc. ACM Hum. Comput. Interact., 2022)

Mood ratings and digital biomarkers from smartphone and wearable data differentiates and predicts depression status: A longitudinal data analysis. - Kennedy Opoku Asare; Isaac Moshe; Yannik Terhorst; Julio Vega; Simo Hosio; Harald Baumeister; Laura Pulkki-Råback; Denzil Ferreira (Pervasive Mob. Comput., 2022)

AWARE-Light: a smartphone tool for experience sampling and digital phenotyping. - Niels van Berkel; Simon D'Alfonso; Rio Kurnia Susanto; Denzil Ferreira; Vassilis Kostakos (Pers. Ubiquitous Comput., 2023)

"Leave your smartphone out of bed": quantitative analysis of smartphone use effect on sleep quality. - Saba Kheirinejad; Aku Visuri; Denzil Ferreira; Simo Hosio (Pers. Ubiquitous Comput., 2023)

Exploring crowdsourced self-care techniques: A study on Parkinson's disease. - Elina Kuosmanen; Eetu Huusko; Niels van Berkel; Francisco Nunes; Julio Vega; Jorge Gonçalves 001; Mohamed Khamis; Augusto Esteves; Denzil Ferreira; Simo Hosio (Int. J. Hum. Comput. Stud., 2023)

Addressing Data Challenges to Drive the Transformation of Smart Cities. - Ekaterina Gilman; Francesca Bugiotti; Ahmed Khalid; Hassan Mehmood; Panos Kostakos 001; Lauri Tuovinen; Johanna Ylipulli; Xiang Su; Denzil Ferreira (ACM Trans. Intell. Syst. Technol., 2024)