Improving Presentation Attack Detection for ID Cards on Remote Verification Systems

In this paper, an updated two-stage, end-to-end Presentation Attack Detection method for remote biometric verification systems of ID cards, based on MobileNetV2, is presented. Several presentation attack species such as printed, display, composite (based on cropped and spliced areas), plastic (PVC), and synthetic ID card images using different capture sources are used. This proposal was developed using a database consisting of 190.000 real case Chilean ID card images with the support of a third-party company. Also, a new framework called PyPAD, used to estimate multi-class metrics compliant with the ISO/IEC 30107-3 standard was developed, and will be made available for research purposes. Our method is trained on two convolutional neural networks separately, reaching BPCER\textsubscript{100} scores on ID cards attacks of 1.69\% and 2.36\% respectively. The two-stage method using both models together can reach a BPCER\textsubscript{100} score of 0.92\%

Dissociation and interpersonal autonomic physiology in psychotherapy research: an integrative view encompassing psychodynamic and neuroscience theoretical frameworks

Interpersonal autonomic physiology is an interdisciplinary research field, assessing the relational interdependence of two (or more) interacting individual both at the behavioral and psychophysiological levels. Despite its quite long tradition, only eight studies since 1955 have focused on the interaction of psychotherapy dyads, and none of them have focused on the shared processual level, assessing dynamic phenomena such as dissociation. We longitudinally observed two brief psychodynamic psychotherapies, entirely audio and video-recorded (16 sessions, weekly frequency, 45 min.). Autonomic nervous system measures were continuously collected during each session. Personality, empathy, dissociative features and clinical progress measures were collected prior and post therapy, and after each clinical session. Two-independent judges, trained psychotherapist, codified the interactions\u2019 micro-processes. Time-series based analyses were performed to assess interpersonal synchronization and de-synchronization in patient\u2019s and therapist\u2019s physiological activity. Psychophysiological synchrony revealed a clear association with empathic attunement, while desynchronization phases (range of length 30-150 sec.) showed a linkage with dissociative processes, usually associated to the patient\u2019s narrative core relational trauma. Our findings are discussed under the perspective of psychodynamic models of Stern (\u201cpresent moment\u201d), Sander, Beebe and Lachmann (dyad system model of interaction), Lanius (Trauma model), and the neuroscientific frameworks proposed by Thayer (neurovisceral integration model), and Porges (polyvagal theory). The collected data allows to attempt an integration of these theoretical approaches under the light of Complex Dynamic Systems. The rich theoretical work and the encouraging clinical results might represents a new fascinating frontier of research in psychotherapy

The Human Use of the Human Face: The Photographic Self-­Portrait in the Age of the Selfie

Karen Ann Donnachie's research explores the phenomenon of the selfie as a vehicle for the mass projection of self and the effect it has on contemporary notions of identity, society and photography. During her practice-led research, Donnachie created electronic, algorithmic and Internet artworks including self-made and self-programmed ‘selfie’ cameras. This thesis maps the complex genre of the selfie between performance, narcissism, social tic, intrinsic desire for self-projection and a quest for authenticity and human connection

Adolescents’ engagement with social media

Social media plays an increasingly important role in the daily lives of adolescents. Yet evidence of its effects are mixed, and the field lacks underlying theory to guide more nuanced research. This study explored the psychosocial processes underpinning adolescent engagement with social media. Adolescents (n = 28) were interviewed regarding their experiences of social media, and interview transcripts were analysed using grounded theory methodology. The emergent theory describes a cyclical process of evaluating the risks vs rewards of social media use, experimenting, learning from experiences, and re-calibrating one’s stance towards social media. Two styles of use, active and passive, became apparent, each maintained and defended by numerous strategies employed consciously and unconsciously, with the overarching goal of maintaining a sense of safety regarding their sense of self and status within their social hierarchy. This study depicts a complex, nuanced picture of adolescent engagement with SM, one that encompasses both positive and negative experiences. The model points to the importance of identity and social identity theories, and raises important questions about identity development in this evolving context

Screenomics : a new approach for observing and studying individuals' digital lives

This study describes when and how adolescents engage with their fast-moving and dynamic digital environment as they go about their daily lives. We illustrate a new approach—screenomics—for capturing, visualizing, and analyzing screenomes, the record of individuals’ day-to-day digital experiences. Sample includes over 500,000 smartphone screenshots provided by four Latino/Hispanic youth, age 14 to 15 years, from low-income, racial/ethnic minority neighborhoods. Screenomes collected from smartphones for 1 to 3 months, as sequences of smartphone screenshots obtained every 5 seconds that the device is activated, are analyzed using computational machinery for processing images and text, machine learning algorithms, human labeling, and qualitative inquiry. Adolescents’ digital lives differ substantially across persons, days, hours, and minutes. Screenomes highlight the extent of switching among multiple applications, and how each adolescent is exposed to different content at different times for different durations—with apps, food-related content, and sentiment as illustrative examples. We propose that the screenome provides the fine granularity of data needed to study individuals’ digital lives, for testing existing theories about media use, and for generation of new theory about the interplay between digital media and development

The highlight reel and the real me: how adolescents construct the Facebook fable

Facebook is framed as a dangerous tool or at best, a colossal waste of time for adolescents. Stories of bullying, sexual exploitation, and adolescent idiocy dominate the mainstream and sociological narrative. Yet, there are few sociological studies of 13-18 year olds' social media experience. Available research on this age group is presented from the perspectives of adults or focused on college students. This dissertation seeks to address this gap in the literature by presenting the Facebook stories of 26 adolescents (13-18). It reveals a more contemplative and positive story of adolescent Facebook use than that described in the literature. To capture their lived experience I developed a social media ethnography, including a survey, focus groups, observation of Facebook images, and follow up interviews. These data show that while adolescents spend considerable effort on their impression management work to "document us being awesome," they also want to present an authentic self. When this visual self presentation enters the public realm of Facebook it is altered by the awareness of an audience, and thus their authenticity is bounded by gendered social media rules that highlight masculinity/femininity. Simultaneously they also engage in significant back stage work to evaluate how this presentation aligns with the "real me now." Facebook provides a public space for this self reflection; it allows them to visualize the presentation of self and the feedback they receive on it. Over time these micro interactions and moments of self reflection work to constitute the evolving self. This multi-method study offers media studies a new framework from which to consider the deeper meanings that adolescents make and take from social media. It presents an example of thoughtful decision making that may challenge brain development research indicating that adolescents struggle with impulse control. It also addresses a significant gap in the adolescent development literature by suggesting that work normally done internally to craft the self narrative now has a public presentation. Adolescents are forging a new path to development, and impressively they are taking control of social media technology to do so in a way that is both complicated and potentially helpful

Self-Representation in an Expanded Field

Defined as a self-image made with a hand-held mobile device and shared via social media platforms, the selfie has facilitated self-imaging becoming a ubiquitous part of globally networked contemporary life. Beyond this selfies have facilitated a diversity of image making practices and enabled otherwise representationally marginalized constituencies to insert self-representations into visual culture. In the Western European and North American art-historical context, self-portraiture has been somewhat rigidly albeit obliquely defined, and selfies have facilitated a shift regarding who literally holds the power to self-image. Like self-portraits, not all selfies are inherently aesthetically or conceptually rigorous or avant-guard. But, –as this project aims to do address via a variety of interdisciplinary approaches– selfies have irreversibly impacted visual culture, contemporary art, and portraiture in particular. Selfies propose new modes of self-imaging, forward emerging aesthetics and challenge established methods, they prove that as scholars and image-makers it is necessary to adapt and innovate in order to contend with the most current form of self-representation to date. The essays gathered herein will reveal that in our current moment it is necessary and advantageous to consider the merits and interventions of selfies and self-portraiture in an expanded field of self-representations. We invite authors to take interdisciplinary global perspectives, to investigate various sub-genres, aesthetic practices, and lineages in which selfies intervene to enrich the discourse on self-representation in the expanded field today. Ace LehnerEdito

The Cowl - v.78 - n.19 - Mar 27, 2014

The Cowl - student newspaper of Providence College. Volume 78 - No. 19 - March 27, 2014. 24 pages