Jorge Goncalves

Impact of contextual and personal determinants on online social conformity

S Wijenayake, N van Berkel, V Kostakos, J Goncalves

Journal article  |  2020  |  Computers in Human Behavior

Despite decades of research concerning social conformity and its effects on face-to-face groups, it is yet to be comprehensively i..

Quantifying the Effect of Social Presence on Online Social Conformity

S Wijenayake, N Van Berkel, V Kostakos, J Goncalves

Journal article  |  2020  |  Proceedings of the ACM on Human-Computer Interaction

Social conformity occurs when individuals in group settings change their personal opinion to be in agreement with the majority's p..

Human accuracy in mobile data collection

N van Berkel, J Goncalves, K Wac, S Hosio, AL Cox

Journal article  |  2020  |  International Journal of Human-Computer Studies

The collection of participant data ‘in the wild’ is widely employed by Human-Computer Interaction researchers. A variety of method..

“Hi! I am the Crowd Tasker” Crowdsourcing through Digital Voice Assistants

Danula Hettiachchi, Zhanna Sarsenbayeva, Fraser Allison, Niels van Berkel, Tilman Dingler, Gabriele Marini, Vassilis Kostakos, Jorge Goncalves

Conference Proceedings  |  2020  |  Proceedings of the 2020 CHI Conference on Human Factors in Computing Systems

Inspired by the increasing prevalence of digital voice assistants, we demonstrate the feasibility of using voice interfaces to dep..

Does Smartphone Use Drive our Emotions or vice versa? A Causal Analysis

Zhanna Sarsenbayeva, Gabriele Marini, Niels van Berkel, Chu Luo, Weiwei JIANG, Kangning YANG, Greg Wadley, Tilman Dingler, Jorge Goncalves, Vassilis Kostakos

Conference Proceedings  |  2020  |  Proceedings of the 2020 CHI Conference on Human Factors in Computing Systems

In this paper, we demonstrate the existence of a bidirectional causal relationship between smartphone application use and user emo..

Accurate Measurement of Handwash Quality Using Sensor Armbands: Instrument Validation Study

Chaofan Wang, Zhanna Sarsenbayeva, Xiuge Chen, Tilman Dingler, Jorge Goncalves, Vassilis Kostakos

Journal article  |  2020  |  JMIR mHealth and uHealth

BACKGROUND: Hand hygiene is a crucial and cost-effective method to prevent health care-associated infections, and in 2009, the Wor..

Crowdsourcing sensitive data using public displays-opportunities, challenges, and considerations

Andy Alorwu, Niels van Berkel, Jorge Goncalves, Jonas Oppenlaender, Miguel Bordallo Lopez, Mahalakshmy Seetharaman, Simo Hosio

Journal article  |  2020  |  Personal and Ubiquitous Computing

Engaging Participants during Selection Studies in Virtual Reality

Difeng Yu, Qiushi Zhou, Benjamin Tag, Tilman Dingler, Eduardo Velloso, Jorge Goncalves

Conference Proceedings  |  2020  |  2020 IEEE Conference on Virtual Reality and 3D User Interfaces (VR)

Selection studies are prevalent and indispensable for VR research. However, due to the tedious and repetitive nature of many such ..

A Survey of Context Simulation for Testing Mobile Context-Aware Applications

Chu Luo, Jorge Goncalves, Eduardo Velloso, Vassilis Kostakos

Journal article  |  2020  |  ACM Computing Surveys

Equipped with an abundance of small-scale microelectromechanical sensors, modern mobile devices such as smartphones and smartwatch..

Overcoming compliance bias in self-report studies: A cross-study analysis

Niels van Berkel, Jorge Goncalves, Simo Hosio, Zhanna Sarsenbayeva, Eduardo Velloso, Vassilis Kostakos

Journal article  |  2020  |  International Journal of Human-Computer Studies

A popular methodology used for in situ observations is the Experience Sampling Method (ESM), in which participants intermittently ..

Benchmarking commercial emotion detection systems using realistic distortions of facial image datasets

K Yang, C Wang, Z Sarsenbayeva, B Tag, T Dingler, G Wadley, J Goncalves

Journal article  |  2020  |  The Visual Computer

Currently, there are several widely used commercial cloud-based services that attempt to recognize an individual’s emotions based ..

Crowdsourcing Personalized Weight Loss Diets

SJ Hosio, N Van Berkel, J Oppenlaender, J Goncalves

Journal article  |  2020  |  Computer

The Diet Explorer is a lightweight system that relies on aggregated human insights for assessing and recommending suitable weight ..

Probing Sucrose Contents in Everyday Drinks Using Miniaturized Near-Infrared Spectroscopy Scanners

Weiwei Jiang, Gabriele Marini, Niels van Berkel, Zhanna Sarsenbayeva, Zheyu Tan, Chu Luo, Xin He, Tilman Dingler, Jorge Goncalves, Yoshihiro Kawahara, Vassilis Kostakos

Journal article  |  2019  |  Proceedings of the ACM on Interactive, Mobile, Wearable and Ubiquitous Technologies

Near-Infrared Spectroscopy (NIRS) is a non-invasive sensing technique which can be used to acquire information on an object's chem..

Towards effective crowd-powered online content moderation

D Hettiachchi, J Goncalves

Conference Proceedings  |  2019  |  OZCHI'19: Proceedings of the 31st Australian Conference on Human-Computer-Interaction

Crowdsourcing Perceptions of Fair Predictors for Machine Learning: A Recidivism Case Study

Niels van Berkel, Jorge Goncalves, Danula Hettiachchi, Senuri Wijenayake, Ryan Kelly, Vassilis Kostakos

Journal article  |  2019  |  Proceedings of the ACM on Human-Computer Interaction

The increased reliance on algorithmic decision-making in socially impactful processes has intensified the calls for algorithms tha..

Measuring the effects of gender on online social conformity

S Wijenayake, N Van Berkel, V Kostakos, J Goncalves

Journal article  |  2019  |  Proceedings of the ACM on Human-Computer Interaction

Social conformity occurs when an individual changes their behaviour in line with the majority’s expectations. Although social conf..

Towards context-free semantic localisation

Gabriele Marini, Jorge Gonçalves, Eduardo Velloso, Raja Jurdak, Vassilis Kostakos

Conference Proceedings  |  2019  |  Proceedings of the 2019 ACM International Joint Conference on Pervasive and Ubiquitous Computing and Proceedings of the 2019 ACM International Symposium on Wearable Computers - UbiComp/ISWC '19

We propose a context-free semantic localisation approach to visualise and analyse indoor movements. We focus on settings where ind..

Search Support for Exploratory Writing

Jonas Oppenlaender, Elina Kuosmanen, Simo Hosio, Jorge Goncalves

Conference Proceedings  |  2019  |  Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)

Writing articles involves searching, exploring, evaluating and reflecting upon different perspectives. To this end, online search ..

Effect of Ambient Light on Mobile Interaction

Zhanna Sarsenbayeva, Niels van Berkel, Weiwei Jiang, Danula Hettiachchi, Vassilis Kostakos, Jorge Goncalves

Conference Proceedings  |  2019  |  Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)

In this work we investigate the effect of ambient light on performance during mobile interaction. We evaluate three conditions of ..

Addressing Cooperation Issues in Situated Crowdsourcing

Jorge Goncalves, Simo Hosio, Niels van Berkel, Simon Klakegg

Book Chapter  |  2019

Situated crowdsourcing has been growing in popularity as an alternative way to collect complex and often creative crowd work. Howe..

Understanding smartphone notifications’ user interactions and content importance

Aku Visuri, Niels van Berkel, Tadashi Okoshi, Jorge Goncalves, Vassilis Kostakos

Journal article  |  2019  |  International Journal of Human-Computer Studies

We present the results of our experiment aimed to comprehensively understand the combination of 1) how smartphone users interact w..

Crowd-powered interfaces for creative design thinking

J Oppenlaender, N Shireen, M Mackeprang, H Erhan, J Goncalves, S Hosio

Conference Proceedings  |  2019  |  Proceedings of the 2019 on Creativity and Cognition

© 2019 Authors. Crowdsourcing is a powerful approach for tapping into the collective insights of diverse crowds. Thus, crowdsourci..

Fueling AI with public displays?: A feasibility study of collecting biometrically tagged consensual data on a university campus

S Hosio, A Alorwu, N Van Berkel, MB López, M Seetharaman, J Oppenlaender, J Goncalves

Conference Proceedings  |  2019  |  Proceedings of the 8th ACM International Symposium on Pervasive Displays

Interactive public displays have matured into highly capable two-way interfaces. They can be used for efficiently delivering infor..

(DCS2)-S-2: Designing Crowd-powered Creativity Support Systems

J Oppenlaender, A Khiat, J Goncalves, M Mackeprang, M Vuković, S Hosio

Conference Proceedings  |  2019  |  Extended Abstracts of the 2019 CHI Conference on Human Factors in Computing Systems

Supporting creativity has been considered as one of the grand challenges of Human Computer Interaction. All creativity lies within..

Addressing the challenges of situationally-induced impairments and disabilities in mobile interaction

GW Tigwell, BM Gorman, J Goncalves, JO Wobbrock, Z Sarsenbayeva, DR Flatla, Y Yesilada

Conference Proceedings  |  2019  |  Extended Abstracts of the 2019 CHI Conference on Human Factors in Computing Systems

© 2019 Copyright held by the owner/author(s). Situationally-induced impairments and disabilities (SIIDs) make it difficult for use..

CamTest: A laboratory testbed for camera-based mobile sensing applications

Chu Luo, Zewen Xu, Ruining Dong, Jorge Goncalves, Eduardo Velloso, Vassilis Kostakos

Journal article  |  2019  |  Pervasive and Mobile Computing

Effect of experience sampling schedules on response rate and recall accuracy of objective self-reports

Niels van Berkel, Jorge Goncalves, Lauri Loven, Denzil Ferreira, Simo Hosio, Vassilis Kostakos

Journal article  |  2019  |  International Journal of Human-Computer Studies

Verifying nondeterministic processes driven by broadcasts on Android

C Luo, X Ma, Y Tian, J Goncalves, E Velloso, V Kostakos

Conference Proceedings  |  2019  |  2019 IEEE 3rd Information Technology, Networking, Electronic and Automation Control Conference (ITNEC)

Broadcasts in Android facilitate inner-process and inter-process communications. Although broadcasts enable high scalability and l..

Energy-efficient prediction of smartphone unlocking

Chu Luo, Aku Visuri, Simon Klakegg, Niels van Berkel, Zhanna Sarsenbayeva, Antti Mottonen, Jorge Goncalves, Theodoros Anagnostopoulos, Denzil Ferreira, Huber Flores, Eduardo Velloso, Vassilis Kostakos

Journal article  |  2019  |  Personal and Ubiquitous Computing

Effect of Cognitive Abilities on Crowdsourcing Task Performance

Danula Hettiachchi, Niels van Berkel, Simo Hosio, Vassilis Kostakos, Jorge Goncalves

Conference Proceedings  |  2019  |  Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)

Matching crowd workers to suitable tasks is highly desirable as it can enhance task performance, reduce the cost for requesters, a..

Capturing contextual morality

Niels van Berkel, Simo Hosio, Benjamin Tag, Jorge Goncalves

Conference Proceedings  |  2019  |  Proceedings of the 2019 ACM International Joint Conference on Pervasive and Ubiquitous Computing and Proceedings of the 2019 ACM International Symposium on Wearable Computers - UbiComp/ISWC '19

In order to build more fair Artificial Intelligence applications, a thorough understanding of human morality is required. Given th..

Learning-Assisted Optimization in Mobile Crowd Sensing: A Survey

Jiangtao Wang, Yasha Wang, Daqing Zhang, Jorge Goncalves, Denzil Ferreira, Aku Visuri, Sen Ma

Journal article  |  2019  |  IEEE Transactions on Industrial Informatics

Measuring the Effects of Stress on Mobile Interaction

Zhanna Sarsenbayeva, Niels van Berkel, Danula Hettiachchi, Weiwei Jiang, Tilman Dingler, Eduardo Velloso, Vassilis Kostakos, Jorge Goncalves

Journal article  |  2019  |  Proceedings of the ACM on Interactive, Mobile, Wearable and Ubiquitous Technologies

Research shows that environmental factors such as ambient noise and cold ambience can render users situationally impaired, adverse..

Task routing and assignment in crowdsourcing based on cognitive abilities

J Goncalves, M Feldman, S Hu, V Kostakos, A Bernstein

Conference Proceedings  |  2019  |  Proceedings of the 26th International Conference on World Wide Web (WWW ’17)

Enabling Creative Crowd Work through Smart Speakers

Danula Hettiachchi, Niels van Berkel, Tilman Dingler, Fraser Allison, Vassilis Kostakos, Jorge Goncalves

Conference Proceedings  |  2019  |  ACM SIGCHI Conference on Human Factors in Computing Systems 2019 Extended Abstracts

Digital voice assistants or smart speakers have rapidly changed the landscape of voice user interfaces over the past few years. In..

Cognitive Aid: Task Assistance Based On Mental Workload Estimation

Qiushi Zhou, Joshua Newn, Namrata Srivastava, Tilman Dingier, Jorge Goncalves, Eduardo Velloso

Conference Proceedings  |  2019  |  Extended Abstracts of the 2019 CHI Conference on Human Factors in Computing Systems

Situationally-Induced Impairments and Disabilities Research

Z Sarsenbayeva, J Goncalves, V Kostakos

Conference Proceedings  |  2019  |  ACM SIGCHI Conference on Human Factors in Computing Systems 2019 Extended Abstracts

Research has shown that various environmental factors impact smartphone interaction and lead to Situationally-Induced Impairments ..

Context-Informed Scheduling and Analysis: Improving Accuracy of Mobile Self-Reports

Niels van Berkel, Jorge Goncalves, Peter Koval, Simo Hosio, Tilman Dingler, Denzil Ferreira, Vassilis Kostakos

Conference Proceedings  |  2019  |  Proceedings of the 2019 CHI Conference on Human Factors in Computing Systems - CHI '19

Mobile self-reports are a popular technique to collect participant labelled data in the wild. While literature has focused on incr..

Improving wearable sensor data quality using context markers

Chaofan Wang, Zhanna Sarsenbayeva, Chu Luo, Jorge Goncalves, Vassilis Kostakos

Conference Proceedings  |  2019  |  Proceedings of the 2019 ACM International Joint Conference on Pervasive and Ubiquitous Computing and Proceedings of the 2019 ACM International Symposium on Wearable Computers - UbiComp/ISWC '19

A major challenge in human activity recognition over long periods with multiple sensors is clock synchronization of independent da..

Contextual Morality for Human-Centered Machine Learning

Niels van Berkel, Jorge Goncalves, Benjamin Tag, Simo Hosio

Conference Proceedings  |  2019

Big data and the increased use of Artificial Intelligence (AI) and Machine Learning (ML) have opened many new opportunities for co..

Mobile Decision Support and Data Provisioning for Low Back Pain

Simo Hosio, Jaro Karppinen, Niels van Berkel, Jonas Oppenlaender, Jorge Goncalves

Journal article  |  2018  |  Computer

Kinship verification from facial images and videos: human versus machine

Miguel Bordallo Lopez, Abdenour Hadid, Elhocine Boutellaa, Jorge Goncalves, Vassilis Kostakos, Simo Hosio

Journal article  |  2018  |  Machine Vision and Applications

MHC '18-International Workshop on Mobile Human Contributions: Opportunities and Challenges

Niels van Berkel, Simo Hosio, Jorge Goncalves, Katarzyna Wac, Vassilis Kostakos, Anna Cox

Conference Proceedings  |  2018  |  International Joint Conference on Pervasive and Ubiquitous Computing

Ubiquitous Mobile Sensing: Behaviour, Mood, and Environment

Aku Visuri, Kennedy Opoku Asare, Elina Kuosmanen, Yuuki Nishiyama, Denzil Ferreira, Zhanna Sarsenbayeva, Jorge Goncalves, Niels van Berke, Greg Wadley, Vassilis Kostakos, Sarah Clinch, Oludamilare Matthews, Simon Harper, Amy Jenkins, Stephen Snow, MC Schraefel

Conference Proceedings  |  2018  |  International Joint Conference on Pervasive and Ubiquitous Computing

Inferring the Mood of a Community From Their Walking Speed: A Preliminary Study

Oludamilare Matthews, Zhanna Sarsenbayeva, Weiwei Jiang, Joshua Newn, Eduardo Velloso, Sarah Clinch, Jorge Goncalves

Conference Proceedings  |  2018  |  Proceedings of the 2018 ACM International Joint Conference and 2018 International Symposium on Pervasive and Ubiquitous Computing and Wearable Computers - UbiComp '18

Facilitating Collocated Crowdsourcing on Situated Displays

Simo Hosio, Jorge Goncalves, Niels van Berkel, Simon Klakegg, Shin'Ichi Konomi, Vassilis Kostakos

Journal article  |  2018  |  Human–Computer Interaction

Crowdsourcing Treatments for Low Back Pain

Simo Johannes Hosio, Jaro Karppinen, Esa-Pekka Takala, Jani Takatalo, Jorge Goncalves, Niels van Berkel, Shin'ichi Konomi, Vassilis Kostakos

Conference Proceedings  |  2018  |  Proceedings of the 2018 CHI Conference on Human Factors in Computing Systems - CHI '18

Assisted Medication Management in Elderly Care Using Miniaturised Near-Infrared Spectroscopy

S Klakegg, J Goncalves, A Visuri, C Luo, A Popov, N van Berkel, Z Sarsenbayeva, V Kostakos, S Hosio, S Savage, A Bykov, I Meglinski, D Ferreira

Journal article  |  2018  |  Proceedings of the ACM on Interactive, Mobile, Wearable and Ubiquitous Technologies

Near-infrared spectroscopy (NIRS) measures the light reflected from objects to infer highly detailed information about their molec..

Effect of Distinct Ambient Noise Types on Mobile Interaction

Z Sarsenbayeva, N van Berkel, E Velloso, V Kostakos, J Goncalves

Journal article  |  2018  |  Proceedings of the ACM on Interactive, Mobile, Wearable and Ubiquitous Technologies (IMWUT)

The adverse effect of ambient noise on humans has been extensively studied in fields like cognitive science, indicating a signific..

Improving Accuracy in Mobile Human Contributions: An Overview

Niels van Berkel, Matthias Budde, Senuri Wijenayake, Jorge Goncalves

Conference Proceedings  |  2018  |  Proceedings of the 2018 ACM International Joint Conference and 2018 International Symposium on Pervasive and Ubiquitous Computing and Wearable Computers - UbiComp '18

Informed Diet Selection: Increasing Food Literacy through Crowdsourcing

N van Berkel, S Hosio, J Goncalves, V Kostakos

Conference Proceedings  |  2018  |  ACM SIGCHI Conference on Human Factors in Computing Systems 2018 Extended Abstracts

Challenges of Situational Impairments during Interaction with Mobile Devices

Z Sarsenbayeva, N van Berkel, C Luo, V Kostakos, J Goncalves

Conference Proceedings  |  2017  |  Proceedings of the 29th Australian Conference on Computer-Human Interaction - OZCHI '17

User interaction with mobile devices can be negatively affected by contextual factors, known as situationally-induced impairments...

Gamification of Mobile Experience Sampling Improves Data Quality and Quantity

Niels van Berkel, Jorge Goncalves, Simo Hosio, Vassilis Kostakos

Journal article  |  2017  |  Proceedings of the ACM on Interactive, Mobile, Wearable and Ubiquitous Technologies (IMWUT)

CrowdPickUp

Jorge Goncalves, Simo Hosio, Niels van Berkel, Furqan Ahmed, Vassilis Kostakos

Journal article  |  2017  |  Proceedings of the ACM on Interactive, Mobile, Wearable and Ubiquitous Technologies (IMWUT)

TestAWARE: A Laboratory-Oriented Testing Tool for Mobile Context-Aware Applications

C Luo, M Kuutila, S Klakegg, D Ferreira, H Flores, J Goncalves, M Mäntylä, V Kostakos

Journal article  |  2017  |  Proceedings of the ACM on Interactive, Mobile, Wearable and Ubiquitous Technologies (IMWUT)

Sensing Cold-Induced Situational Impairments in Mobile Interaction Using Battery Temperature

Z Sarsenbayeva, N Van Berkel, A Visuri, S Rissanen, H Rintamaki, V Kostakos, J Goncalves

Journal article  |  2017  |  Proceedings of the ACM on Interactive, Mobile, Wearable and Ubiquitous Technologies (IMWUT)

Environmental exposure assessment using indoor/outdoor detection on smartphones

Theodoros Anagnostopoulos, Juan Camilo Garcia, Jorge Goncalves, Denzil Ferreira, Simo Hosio, Vassilis Kostakos

Journal article  |  2017  |  PERSONAL AND UBIQUITOUS COMPUTING

We present an energy-efficient method for Indoor/Outdoor detection on smartphones. The creation of an accurate environmental expos..

Towards commoditised near infrared spectroscopy

S Klakegg, J Goncalves, N Van Berkel, C Luo, S Hosio, V Kostakos

Conference Proceedings  |  2017  |  Proceedings of the 2017 Conference on Designing Interactive Systems

Near Infrared Spectroscopy (NIRS) is a sensing technique in which near infrared light is transmitted into a sample, followed by li..

Community Reminder: Participatory contextual reminder environments for local communities

Tomoyo Sasao, Shin'ichi Konomi, Vassilis Kostakos, Keisuke Kuribayashi, Jorge Goncalves

Journal article  |  2017  |  International Journal of Human-Computer Studies

Mobile and situated crowdsourcing

J Goncalves, S Hosio, M Vukovic, S Konomi

Journal article  |  2017  |  International Journal of Human-Computer Studies

Eliciting Structured Knowledge from Situated Crowd Markets

Jorge Goncalves, Simo Hosio, Vassilis Kostakos

Journal article  |  2017  |  ACM Transactions on Internet Technology

Tapping Task Performance on Smartphones in Cold Temperature

Jorge Goncalves, Zhanna Sarsenbayeva, Niels van Berkel, Chu Luo, Simo Hosio, Sirkka Risanen, Hannu Rintamazki, Vassilis Kostakos

Journal article  |  2017  |  Interacting with Computers

Donating Context Data to Science: The Effects of Social Signals and Perceptions on Action-Taking

Yong Liu, Denzil Ferreira, Jorge Goncalves, Simo Hosio, Pratyush Pandab, Vassilis Kostakos

Journal article  |  2017  |  Interacting with Computers

Quantifying Sources and Types of Smartwatch Usage Sessions

Aku Visuri, Zhanna Sarsenbayeva, Niels van Berkel, Jorge Goncalves, Reza Rawassizadeh, Vassilis Kostakos, Denzil Ferreira

Conference Proceedings  |  2017  |  Proceedings of the 2017 CHI Conference on Human Factors in Computing Systems - CHI '17

Rapid Clock Synchronisation for Ubiquitous Sensing Services Involving Multiple Smartphones

Chu Luo, Henri Koski, Mikko Korhonen, Jorge Goncalves, Theodoros Anagnostopoulos, Shin'Ichi Konomi, Simon Klakegg, Vassilis Kostakos

Conference Proceedings  |  2017  |  Proceedings of the 2017 ACM International Joint Conference on Pervasive and Ubiquitous Computing and Proceedings of the 2017 ACM International Symposium on Wearable Computers

Designing a Context-Aware Assistive Infrastructure for Elderly Care

Simon Klakegg, Chu Luo, Jorge Goncalves, Niels van Berkel, Denzil Ferreira, Aku Visuri, Hanna-Leena Huttunen, Simo Hosio

Conference Proceedings  |  2017  |  Proceedings of the 2017 ACM International Joint Conference on Pervasive and Ubiquitous Computing and Proceedings of the 2017 ACM International Symposium on Wearable Computers

Creator-Centric Study of Digital Art Exhibitions on Interactive Public Displays

H Kukka, J Ylipulli, J Goncalves, T Ojala, M Kukka, M Syrjälä

Conference Proceedings  |  2017  |  Proceedings of the 16th International Conference on Mobile and Ubiquitous Multimedia - MUM '17

We present a mixed-methods study aimed at assessing artists’ experiences of a digital art exhibition service, called StreetGallery..

Are Smartphones Ubiquitous? An in-depth survey of smartphone adoption by seniors

Anabela Berenguer, Jorge Goncalves, Simo Hosio, Denzil Ferreira, Theodoros Anagnostopoulos, Vassilis Kostakos

Journal article  |  2017  |  IEEE Consumer Electronics Magazine

Human Sensors

V Kostakos, J Rogstadius, D Ferreira, S Hosio, J Goncalves

Book Chapter  |  2017  |  Understanding complex systems

Informing caregivers through an assistive tool: An investigation of elderly care metrics

S Klakegg, N Van Berkel, A Visuri, C Luo, J Goncalves, S Hosio, HL Huttunen, D Ferreira

Conference Proceedings  |  2017  |  HCI 2017: Digital Make Believe - Proceedings of the 31st International BCS Human Computer Interaction Conference, HCI 2017

Predicting Interruptibility for Manual Data Collection: A Cluster-Based User Model

Aku Visuri, Niels van Berkel, Chu Luo, Jorge Goncalves, Denzil Ferreira, Vassilis Kostakos

Conference Proceedings  |  2017  |  Proceedings of the 19th International Conference on Human-Computer Interaction with Mobile Devices and Services

Challenges of quantified-Self: Encouraging self-Reported data logging during recurrent smartphone usage

A Visuri, N Van Berkel, C Luo, J Goncalves, D Ferreira, V Kostakos

Conference Proceedings  |  2017  |  HCI 2017: Digital Make Believe - Proceedings of the 31st International BCS Human Computer Interaction Conference, HCI 2017

Vision-Based Happiness Inference: A Feasibility Case-Study

Zhanna Sarsenbayeva, Denzil Ferreira, Niels van Berkel, Chu Luo, Mikko Vaisanen, Vassilis Kostakos, Jorge Goncalves

Conference Proceedings  |  2017  |  Proceedings of the 2017 ACM International Joint Conference on Pervasive and Ubiquitous Computing and Proceedings of the 2017 ACM International Symposium on Wearable Computers

Fragmentation or cohesion? Visualizing the process and consequences of information system diversity, 1993-2012

Yong Liu, Hongxiu Li, Jorge Goncalves, Vassilis Kostakos, Bei Xiao

Journal article  |  2016  |  European Journal of Information Systems

Worker Performance in a Situated Crowdsourcing Market

Jorge Goncalves, Simo Hosio, Yong Liu, Vassilis Kostakos

Journal article  |  2016  |  Interacting with Computers

Toward Meaningful Engagement with Pervasive Displays

Simo Hosio, Hannu Kukka, Jorge Goncalves, Vassilis Kostakos, Timo Ojala

Journal article  |  2016  |  IEEE Pervasive Computing

Practical simulation of virtual crowds using points of interest

Matti Pouke, Jorge Goncalves, Denzil Ferreira, Vassilis Kostakos

Journal article  |  2016  |  Computers, Environment and Urban Systems

Crowdsourcing Situated & Subjective Knowledge for Decision Support

S Hosio, J Goncalves, N van Berkel, S Klakegg

Conference Proceedings  |  2016  |  Proceedings of the 2016 ACM International Joint Conference on Pervasive and Ubiquitous Computing: Adjunct

Instrumenting Smartphones with Portable NIRS

Simon Klakegg, Chu Luo, Jorge Goncalves, Simo Hosio, Vassilis Kostakos

Conference Proceedings  |  2016  |  Proceedings of the 2016 ACM International Joint Conference on Pervasive and Ubiquitous Computing: Adjunct

Impact of Mood Changes on Application Selection

A Visuri, Z Sarsenbayeva, J Goncalves, E Karapanos, S Jones

Conference Proceedings  |  2016  |  Proceedings of the 2016 ACM International Joint Conference on Pervasive and Ubiquitous Computing: Adjunct

Leveraging Wisdom of the Crowd for Decision Support

S Hosio, J Goncalves, T Anagnostopoulos, V Kostakos

Conference Proceedings  |  2016  |  Proceedings of the 30th International BCS Human Computer Interaction Conference, HCI 2016

Indoor Light Scavenging on Smartphones

Denzil Ferreira, Christian Schuss, Chu Luo, Jorge Goncalves, Vassilis Kostakos, Timo Rahkonen

Conference Proceedings  |  2016  |  Proceedings of the 15th International Conference on Mobile and Ubiquitous Multimedia - MUM '16

Situational Impairments to Mobile Interaction in Cold Environments

Zhanna Sarsenbayeva, Jorge Goncalves, Juan García, Simon Klakegg, Sirkka Rissanen, Hannu Rintamäki, Jari Hannu, Vassilis Kostakos

Conference Proceedings  |  2016  |  Proceedings of the 2016 ACM International Joint Conference on Pervasive and Ubiquitous Computing

How to Validate Mobile Crowdsourcing Design? Leveraging Data Integration in Prototype Testing

Chu Luo, Miikka Kuutila, Simon Klakegg, Denzil Ferreira, Huber Flores, Jorge Goncalves, Vassilis Kostakos, Mika Mäntylä

Conference Proceedings  |  2016  |  Proceedings of the 2016 ACM International Joint Conference on Pervasive and Ubiquitous Computing: Adjunct

A Systematic Assessment of Smartphone Usage Gaps

Niels van Berkel, Chu Luo, Theodoros Anagnostopoulos, Denzil Ferreira, Jorge Goncalves, Simo Hosio, Vassilis Kostakos

Conference Proceedings  |  2016  |  Proceedings of the 2016 CHI Conference on Human Factors in Computing Systems

Utilizing Audio Cues to Raise Awareness and Entice Interaction on Public Displays

H Kukka, J Goncalves, K Wang, T Puolamaa, J Louis, M Mazouzi, LR Barco

Conference Proceedings  |  2016  |  Proceedings of the 2016 ACM Conference on Designing Interactive Systems - DIS '16

WMSC '16: Second Workshop on Mobile and Situated Crowdsourcing

Jorge Goncalves, Simo Hosio, Maja Vukovic, Shin'ichi Konomi, Uichin Lee

Conference Proceedings  |  2016  |  Proceedings of the 2016 ACM International Joint Conference on Pervasive and Ubiquitous Computing: Adjunct

Modelling Smartphone Usage: A Markov State Transition Model

Vassilis Kostakos, Denzil Ferreira, Jorge Goncalves, Simo Hosio

Conference Proceedings  |  2016  |  Proceedings of the 2016 ACM International Joint Conference on Pervasive and Ubiquitous Computing

A Data Hiding Approach for Sensitive Smartphone Data

Chu Luo, Angelos Fylakis, Juha Partala, Simon Klakegg, Jorge Goncalves, Kaitai Liang, Tapio Seppanen, Vassilis Kostakos

Conference Proceedings  |  2016  |  Proceedings of the 2016 ACM International Joint Conference on Pervasive and Ubiquitous Computing

Monetary Assessment of Battery Life on Smartphones

Simo Hosio, Denzil Ferreira, Jorge Goncalves, Niels van Berkel, Chu Luo, Muzamil Ahmed, Huber Flores, Vassilis Kostakos

Conference Proceedings  |  2016  |  Proceedings of the 2016 CHI Conference on Human Factors in Computing Systems

RDV: An Easy to Use Data Visualisation Tool for Reddit

J Goncalves

Conference Proceedings  |  2016  |  The 2016 Internet, Policy & Politics Conference

Crowdsourcing Queue Estimations in Situ

Jorge Goncalvesi, Hannu Kukka, Ivan Sanchez, Vassilis Kostakosi

Conference Proceedings  |  2016  |  Proceedings of the 19th ACM Conference on Computer-Supported Cooperative Work & Social Computing

Opportunistic at-glance information acquisition on interactive public displays

H Kukka, J Goncalves, A Samodelkin, T Ojala

Conference Proceedings  |  2015  |  Proceedings of the 14th International Conference on Mobile and Ubiquitous Multimedia

Motivating participation and improving quality of contribution in ubiquitous crowdsourcing

Jorge Goncalves, Simo Hosio, Jakob Rogstadius, Evangelos Karapanos, Vassilis Kostakos

Journal article  |  2015  |  Computer Networks

Workshop on mobile and situated crowdsourcing

J Goncalves, S Hosio, V Kostakos, M Vukovic, S Konomi

Conference Proceedings  |  2015  |  Proceedings of the 2015 ACM International Joint Conference on Pervasive and Ubiquitous Computing

Bazaar: A situated crowdsourcing market

J Goncalves, S Hosio, D Ferreira, T Anagnostopoulos, V Kostakos

Conference Proceedings  |  2015  |  Proceedings of the 2015 ACM International Joint Conference on Pervasive and Ubiquitous Computing

The curse of quantified-self: An endless quest for answers

N Van Berkel, C Luo, D Ferreira, J Goncalves, V Kostakos

Conference Proceedings  |  2015  |  Proceedings of the 2015 ACM International Joint Conference on Pervasive and Ubiquitous Computing

Touch OK to continue: Error messages and affective response on interactive public displays

H Kukka, J Goncalves, T Heikkinen, OP Suua, Y Zuo, H Raappana, M Abdellatif, O Okkonen, R Jiménez, T Ojala

Conference Proceedings  |  2015  |  Proceedings of the 4th International Symposium on Pervasive Displays

Crowdsourcing Public Opinion Using Urban Pervasive Technologies: Lessons From Real-Life Experiments in Oulu

Simo Hosio, Jorge Goncalves, Vassilis Kostakos, Jukka Riekki

Journal article  |  2015  |  Policy & Internet

Increasing the Reach of Government Social Media: A Case Study in Modeling Government-Citizen Interaction on Facebook

Jorge Goncalves, Yong Liu, Bin Xiao, Saad Chaudhry, Simo Hosio, Vassilis Kostakos

Journal article  |  2015  |  Policy & Internet

Revisitation analysis of smartphone app use

Simon Jones, Denzil Ferreira, Simo Hosio, Jorge Goncalves, Vassilis Kostakos

Conference Proceedings  |  2015  |  Proceedings of the 2015 ACM International Joint Conference on Pervasive and Ubiquitous Computing - UbiComp '15

Life through the lens: a qualitative investigation of human behaviour with an urban photography service

Simo Hosio, Richard Harper, Kenton O Hara, Jorge Goncalves, Vassilis Kostakos

Conference Proceedings  |  2015  |  Proceedings of the 2015 British HCI Conference on - British HCI '15

The proliferation of computation in our everyday environment enables new types of interaction and communication devices. Understan..

Situated Crowdsourcing: Feasibility, Performance and Behaviours

Jorge Goncalves

Thesis / Dissertation  |  2015

Online Disclosure of Personally Identifiable Information with Strangers: Effects of Public and Private Sharing

Jayant Venkatanathan, Vassilis Kostakos, Evangelos Karapanos, Jorge Goncalves

Journal article  |  2014  |  Interacting with Computers

An empirical investigation of mobile government adoption in rural China: A case study in Zhejiang province

Yong Liu, Hongxiu Li, Vassilis Kostakos, Jorge Goncalves, Simo Hosio, Feng Hu

Journal article  |  2014  |  Government Information Quarterly

Modeling What Friendship Patterns on Facebook Reveal About Personality and Social Capital

Yong Liu, Jayant Venkatanathan, Jorge Goncalves, Evangelos Karapanos, Vassilis Kostakos

Journal article  |  2014  |  ACM Transactions on Computer-Human Interaction

Citizen Motivation on the Go: The Role of Psychological Empowerment

Jorge Goncalves, Vassilis Kostakos, Evangelos Karapanos, Mary Barreto, Tiago Camacho, Anthony Tomasic, John Zimmerman

Journal article  |  2014  |  Interacting with Computers

Multipurpose Public Displays: Can Automated Grouping of Applications and Services Enhance User Experience?

Christos Katsanos, Nikolaos Tselios, Jorge Goncalves, Tomi Juntunen, Vassilis Kostakos

Journal article  |  2014  |  International Journal of Human-Computer Interaction

Projective testing of diurnal collective emotion

Jorge Goncalves, Pratyush Pandab, Denzil Ferreira, Mohammad Ghahramani, Guoying Zhao, Vassilis Kostakos

Conference Proceedings  |  2014  |  Proceedings of the 2014 ACM International Joint Conference on Pervasive and Ubiquitous Computing - UbiComp '14 Adjunct

CHI 1994-2013: Mapping two decades of intellectual progress through co-word analysis

Y Liu, J Goncalves, D Ferreira, B Xiao, S Hosio, V Kostakos

Conference Proceedings  |  2014  |  Proceedings of the SIGCHI Conference on Human Factors in Computing Systems

Situated Engagement and Virtual Services in a Smart City

Simo Hosio, Jorge Goncalves, Hannu Kukka

Conference Proceedings  |  2014  |  Service-Oriented Computing and Applications (SOCA), 2014 IEEE 7th International Conference on

Identity crisis of ubicomp?: mapping 15 years of the field’s development and paradigm change

Yong Liu, Jorge Goncalves, Denzil Ferreira, Simo Hosio, Vassilis Kostakos

Conference Proceedings  |  2014  |  Proceedings of the 2014 ACM International Joint Conference on Pervasive and Ubiquitous Computing - UbiComp '14 Adjunct

Voices in the Noise: Crowdsourcing Public Opinion using Urban Pervasive Technologies

Simo Hosio, Jorge Goncalves, Vassilis Kostakos, Jukka Riekki

Conference Proceedings  |  2014  |  The 2014 Internet, Policy & Politics Conference

What's in it for me: Exploring the real-world value proposition of pervasive displays

S Hosio, J Goncalves, H Kukka, A Chamberlain, A Malizia

Conference Proceedings  |  2014  |  Proceedings of the international symposium on pervasive displays

Eliciting situated feedback: A comparison of paper, web forms and public displays

Jorge Goncalves, Simo Hosio, Yong Liu, Vassilis Kostakos

Journal article  |  2014  |  Displays

Exploring civic engagement on public displays

S Hosio, J Goncalves, V Kostakos, J Riekki

Book Chapter  |  2014

Game of words: tagging places through crowdsourcing on public displays

Jorge Goncalves, Simo Hosio, Denzil Ferreira, Vassilis Kostakos

Conference Proceedings  |  2014  |  Proceedings of the 2014 conference on Designing interactive systems - DIS '14

Mobile cloud storage: a contextual experience

Karel Vandenbroucke, Denzil Ferreira, Jorge Goncalves, Vassilis Kostakos, Katrien De Moor

Conference Proceedings  |  2014  |  Proceedings of the 16th international conference on Human-computer interaction with mobile devices & services - MobileHCI '14

Tandem browsing toolkit: distributed multi-display interfaces with web technologies

Tommi Heikkinen, Jorge Goncalves, Vassilis Kostakos, Ivan Elhart, Timo Ojala

Conference Proceedings  |  2014  |  Proceedings of The International Symposium on Pervasive Displays - PerDis '14

We present the Tandem Browsing toolkit that allows developers to build multi-display and multi-user applications for pervasive dis..

Contextual experience sampling of mobile application micro-usage

Denzil Ferreira, Jorge Goncalves, Vassilis Kostakos, Louise Barkhuus, Anind K Dey

Conference Proceedings  |  2014  |  Proceedings of the 16th international conference on Human-computer interaction with mobile devices & services - MobileHCI '14

Pulse: low bitrate wireless magnetic communication for smartphones

Weiwei Jiang, Denzil Ferreira, Jani Ylioja, Jorge Goncalves, Vassilis Kostakos

Conference Proceedings  |  2014  |  Proceedings of the 2014 ACM International Joint Conference on Pervasive and Ubiquitous Computing - UbiComp '14 Adjunct

Situated crowdsourcing using a market model

Simo Hosio, Jorge Goncalves, Vili Lehdonvirta, Denzil Ferreira, Vassilis Kostakos

Conference Proceedings  |  2014  |  Proceedings of the 27th annual ACM symposium on User interface software and technology - UIST '14

A Case Study in Modelling Government-Citizen Interaction in Facebook

Jorge Goncalves, Yong Liu, Bin Xiao, Saad Chaudhry, Simo Hosio, Vassilis Kostakos

Conference Proceedings  |  2014  |  The 2014 Internet, Policy & Politics Conference

Exploring use and appropriation of a non-moderated community display

M Jurmu, J Goncalves, J Riekki, T Ojala

Conference Proceedings  |  2014  |  Proceedings of the 13th International Conference on Mobile and Ubiquitous Multimedia

Tending a virtual garden: Exploring connectivity between cities

M Pakanen, AM Polli, S Lee, J Lindley, J Goncalves

Conference Proceedings  |  2013  |  Proceedings of the 2013 ACM conference on Pervasive and ubiquitous computing adjunct publication

What makes you click: Exploring visual signals to entice interaction on public displays

H Kukka, H Oja, V Kostakos, J Goncalves, T Ojala

Conference Proceedings  |  2013  |  Proceedings of the SIGCHI Conference on Human Factors in Computing Systems - CHI '13

Where Am I? Location Archetype Keyword Extraction from Urban Mobility Patterns

Vassilis Kostakos, Tomi Juntunen, Jorge Goncalves, Simo Hosio, Timo Ojala

Journal article  |  2013  |  PLOS One

Multipurpose Public Displays: How Shortcut Menus Affect Usage

Vassilis Kostakos, Hannu Kukka, Jorge Goncalves, Nikolaos Tselios, Timo Ojala

Journal article  |  2013  |  IEEE Computer Graphics and Applications

Porting a 3D tablet interface onto a wall-sized display

Danielle Zanni, Toni Alatalo, Jorge Goncalves, Timo Ojala, Leena Arhippainen

Conference Proceedings  |  2013  |  CHI 2013 workshop POWERWALL - International Workshop on Interactive, Ultra-High-Resolution Displays, Paris, France.

Application discoverability on multipurpose public displays: popularity comes at a price

Simo Hosio, Jorge Goncalves, Vassilis Kostakos

Conference Proceedings  |  2013  |  Proceedings of the 2nd ACM International Symposium on Pervasive Displays - PerDis '13

Human interfaces for civic and urban engagement: HiCUE’13

Simo Hosio, Jorge Goncalves, Vassilis Kostakos, Keith Cheverst, Yvonne Rogers

Conference Proceedings  |  2013  |  Proceedings of the 2013 ACM conference on Pervasive and ubiquitous computing adjunct publication - UbiComp '13 Adjunct

Crowdsourcing on the spot: altruistic use of public displays, feasibility, performance, and behaviours

Jorge Goncalves, Denzil Ferreira, Simo Hosio, Yong Liu, Jakob Rogstadius, Hannu Kukka, Vassilis Kostakos

Conference Proceedings  |  2013  |  Proceedings of the 2013 ACM international joint conference on Pervasive and ubiquitous computing - UbiComp '13

Narrowcasting in social media: Effects and perceptions

Jorge Goncalves, Vassilis Kostakos, Jayant Venkatanathan

Conference Proceedings  |  2013  |  Proceedings of the 2013 IEEE/ACM International Conference on Advances in Social Networks Analysis and Mining - ASONAM '13

IncluCity: using contextual cues to raise awareness on environmental accessibility

Jorge Goncalves, Vassilis Kostakos, Simo Hosio, Evangelos Karapanos, Olga Lyra

Conference Proceedings  |  2013  |  Proceedings of the 15th International ACM SIGACCESS Conference on Computers and Accessibility - ASSETS '13

Revisiting human-battery interaction with an interactive battery interface

Denzil Ferreira, Eija Ferreira, Jorge Goncalves, Vassilis Kostakos, Anind K Dey

Conference Proceedings  |  2013  |  Proceedings of the 2013 ACM international joint conference on Pervasive and ubiquitous computing - UbiComp '13

A network science approach to modelling and predicting empathy

Jayant Venkatanathan, Evangelos Karapanos, Vassilis Kostakos, Jorge Gonçalves

Conference Proceedings  |  2013  |  Proceedings of the 2013 IEEE/ACM International Conference on Advances in Social Networks Analysis and Mining - ASONAM '13

Correlating Pedestrian Flows and Search Engine Queries

Vassilis Kostakos, Simo Hosio, Jorge Goncalves

Report  |  2012

Network, Personality and Social Capital

Jayant Venkatanathan, Evangelos Karapanos, Vassilis Kostakos, Jorge Goncalves

Conference Proceedings  |  2012  |  Proceedings of the 4th Annual ACM Web Science Conference

Sharing Ephemeral Information in Online Social Networks: Privacy Perceptions and Behaviours

Bernardo Reynolds, Jayant Venkatanathan, Jorge Goncalves, Vassilis Kostakos

Conference Proceedings  |  2011  |  IFIP Conference on Human-Computer Interaction

Groupster: Narrowcasting on social networking sites

Jorge Gonçalves

Thesis / Dissertation  |  2011