Vassilis Kostakos

Information flow and cognition affect each other: Evidence from digital learning

K Sharma, K Mangaroska, NV Berkel, M Giannakos, V Kostakos

Journal article  |  2021  |  International Journal of Human-Computer Studies

Application of miniaturized near-infrared spectroscopy in pharmaceutical identification

Y Chen, N van Berkel, C Luo, Z Sarsenbayeva, V Kostakos

Journal article  |  2020  |  Smart Health

NIRS is a spectroscopic method that propagates near-infrared waves through objects and measures the absorbance by diffuse reflecti..

Measuring Mobility and Room Occupancy in Clinical Settings: System Development and Implementation

Gabriele Marini, Benjamin Tag, Jorge Goncalves, Eduardo Velloso, Raja Jurdak, Daniel Capurro, Clare McCarthy, William Shearer, Vassilis Kostakos

Journal article  |  2020  |  JMIR mHealth and uHealth

BACKGROUND: The use of location-based data in clinical settings is often limited to real-time monitoring. In this study, we aim to..

CrowdCog:ACognitive Skill basedSystem for Heterogeneous Task Assignment and Recommendation in Crowdsourcing

D Hettiachchi, N Van Berkel, V Kostakos, J Goncalves

Conference Proceedings  |  2020  |  Proceedings of the ACM on Human-Computer Interaction

Will You Come Back/Check-in Again? Understanding Characteristics Leading to Urban Revisitation and Re-check-in

Z Chen, H Cao, H Wang, F Xu, V Kostakos, Y Li

Journal article  |  2020  |  Proceedings of the ACM on Interactive, Mobile, Wearable and Ubiquitous Technologies

Recent years have witnessed much work unraveling human mobility patterns through urban visitation and location check-in data. Trad..

Assessing Cognitive Performance Using Physiological and Facial Features

K Sharma, E Niforatos, M Giannakos, V Kostakos

Journal article  |  2020  |  Proceedings of the ACM on Interactive, Mobile, Wearable and Ubiquitous Technologies

Sensing and machine learning advances have enabled the unobtrusive measurement of physiological responses and facial expressions s..

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..

Personalized Pervasive Health

Oliver Amft, Jesus Favela, Stephen Intille, Micro Musolesi, Vassilis Kostakos

Journal article  |  2020  |  IEEE Pervasive Computing

The articles in this special section focus on personalized pervasive health. For over more than two decades, mobile, wearable, and..

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..

A multi-agent system for distributed smartphone sensing cycling in smart cities

T Anagnostopoulos, C Luo, J Ramson, K Ntalianis, V Kostakos, C Skourlas

Journal article  |  2020  |  Journal of Systems and Information Technology

Purpose: The purpose of this paper is to propose a distributed smartphone sensing-enabled system, which assumes an intelligent tra..