Evangelos Niforatos

Delft University of Technology | TU · Sustainable Design Engineering

The fast evolving Large language Models (LLMs), powered by Generative Pre-Trained Transformers (GPT), have shown revolutionary potential to transform many fields beyond natural language processing. They generate new opportunities for innovation in engineering design and manufacturing. Design and manufacturing represent critical research domains whe...

Ideation is a critical component of video-based design (VBD), where videos serve as the primary medium for design exploration and inspiration. The emergence of generative AI offers considerable potential to enhance this process by streamlining video analysis and facilitating idea generation. In this paper, we present DesignMinds, a prototype that i...

In the shift towards human-centered manufacturing, our two-year longitudinal study investigates the real-world impact of deploying Cognitive Assistants (CAs) in factories. The CAs were designed to facilitate knowledge sharing among factory operators. Our investigation focused on smartphone-based voice assistants and LLM-powered chatbots, examining...

Recent advances in natural language processing enable more intelligent ways to support knowledge sharing in factories. In manufacturing, operating production lines has become increasingly knowledge-intensive, putting strain on a factory's capacity to train and support new operators. This paper introduces a Large Language Model (LLM)-based system de...

ChatGPT and other large language models (LLMs) have proven useful in crowdsourcing tasks, where they can effectively annotate machine learning training data. However, this means that they also have the potential for misuse, specifically to automatically answer surveys. LLMs can potentially circumvent quality assurance measures, thereby threatening...

Operating a complex and dynamic system, such as an agile manufacturing line, is a knowledge-intensive task. It imposes a steep learning curve on novice operators and prompts experienced operators to continuously discover new knowledge, share it, and retain it. In practice, training novices is resource-intensive, and the knowledge discovered by expe...

Incentives and peer competition have so far been employed independently for increasing physical activity. In this paper, we introduce Goalkeeper, a mobile application that utilizes deposit contracts for motivating physical activity in group settings. Goalkeeper enables one to set up a physical exercise challenge with a group of peers that deposit a...

Evolution has always been the main driving force of change for both the human body and brain. Presently, in the Information era, our cognitive and perceptual capacities cannot merely rely on natural evolution to keep up with the immense advancements in modern technologies. But systems we use daily (e.g. computers, smartphones, etc.) remain mostly u...

Humans have an ingenious ability to shape the environment we live in. Twenty thousand years ago, this started with simple shelters and has now advanced to manipulation on a planetary scale. Human abilities are tightly linked to the tools and technologies we have at hand. Nearly nothing that surrounds us in a modern world can be created without soph...

Tools and technologies have long complemented and extended our physical abilities: from pre-historic spearheads to steam-propelled ploughs and high-tech prosthetics. While the development of lenses granted us insights into the micro and macrocosms, new sensors and technologies increasingly augment our cognitive abilities, including memory and perce...

A mobile device, system and method for controlling a heads-up display device is provided. A mobile device is in communication with a heads-up display (HUD) device. The mobile device is enabled to: transmit a portion of display data to the HUD device for display thereupon, rather than provide the portion to a display of the mobile device; and displa...

Sensing and machine learning advances have enabled the unobtrusive measurement of physiological responses and facial expressions so as to estimate one's cognitive performance. This often boils down to mapping the states of the cognitive processes underpinning human cognition: physiological responses (e.g., heart rate) and facial expressions (e.g.,...

Systems, devices, and methods for providing assistance in human-to-human interactions are described. When it is determined that a user of a wearable heads-up display is interacting with another human, interaction assistance information can be presented to the user, such as biographic information relating to the other human, indication of emotional...

The EEGlass prototype is a merger between a Head-Mounted Display (HMD) and a brain-sensing platform with a set of electroencephalography (EEG) electrodes at the contact points with the skull. EEGlass measures unobtrusively the activity of the human brain facilitating the interaction with HMDs for augmenting human cognition. Among others, EEGlass is...

A moral dilemma is a decision-making paradox without un-ambiguously acceptable or preferable options. This paper investigates if and how the virtual enactment of two renowned moral dilemmas-the Trolley and the Mad Bomber-influence decision-making when compared with mentally visualizing such situations. We conducted two user studies with two gender-...

Distractions and interruptions often disrupt mobile learners. Luckily, task resumption (memory) cues can support users in resuming a learning task. These cues can have multiple forms and designs, but their effectiveness depends heavily on their adaptation to the specific learning use case. This work explores the causes of interruptions during mobil...

Contemporary Head-Mounted Displays (HMDs) are progressively becoming socially acceptable by approaching the size and design of normal eyewear. Apart from the exciting interaction design prospects, HMDs bear significant potential in hosting an array of physiological sensors very adjacent to the human skull. As a proof of concept, we illustrate EEGla...

Games are nowadays used to enhance different learning and teaching practices in institutions, companies and other venues. Factors that increase the adoption and integration of learning games have been widely studied in the past. However, the effect of different backgrounds and designs on learners'/players' electroencephalographic (EEG) signals duri...

Head-mounted displays (HMDs) are expected to dominate the market of wearable electronics in the next 5 years. This foreseen proliferation of HMDs yields a plethora of design opportunities for revolutionizing everyday life via novel use cases, but also generates a considerable number of substantial safety implications. In this work, we systematicall...

Designing engaging virtual-reality (VR) experiences to promote a tourist destination is a challenge for destination managers. There is still limited research on which VR characteristics (i.e., format, field of view, presence of animated elements, presence of sound effects, and perceived realness/vividness) have greater impacts on memory recall (i.e...

The proliferation of ubiquitous technologies has allowed us to capture increasing amounts of our daily life in digital format ("lifelogging"). While much work in lifelogging has focused on augmenting human memory in clinical settings, e.g., for people with dementia, the ability to recall our past obviously has also importance in one's work life. Be...

Evolution has always been the main driving force of change for both the human body and brain. Presently, in the Information era, our cognitive capacities cannot simply rely on natural evolution to keep up with the immense advancements in the field of Ubiquitous technologies , which remain largely uninformed about our cognitive states. As a result,...

The growing popularity of winter sports, as well as the trend towards high speed carving skis, have increased the risk of accidents on today's ski slopes. While many skiers now wear ski helmets, their bulk might in turn lower skiers' ability to sense their surroundings, potentially leading to dangerous situations. In this paper, we describe our "Sm...

Since brain-computer interface (BCI) systems have moved outside the laboratory settings, their use in virtual reality and games promised to offer a more compelling experience to the user. BCI for entertainment yields interesting applications with the main purpose to create positive experiences that enrich our lives. However, the main challenge in t...

Today's abundance of cheap digital storage in the form of tiny memory cards put literally no bounds on the number of images one can capture with one's digital camera or smartphone during an event. However, prior work has shown that taking many pictures may actually make us remember less of a particular event. Does automated picture taking (lifelogg...

We propose to design playful solutions to help young people better understand the consequences of their use of language in a community of peers. Our system, CARE, will analyse the content of their messages and extract the emotions they are charged with, both in terms of strength (arousal) and valence (negative or positive). Their effects will be tr...

Tourism is among the domains that might see in Virtual reality (VR) several advances for promoting its products and services. This study is one of the first that proposes the use of biophysical data for investigating the media effects of a tourism-related VR experience and discusses the use of such technique for studying media effects in VR setting...

Winter sports like skiing and snowboarding are often group activities. Groups of skiers and snowboarders traditionally use paper maps or board-mounted larger-scale maps near ski lifts to aid decision making: which slope to take next, where to have lunch, or what hazards to avoid when going off-piste. To enrich those static maps with personal conten...

Today's mobile app economy has greatly expanded the types of " things " people can share – spanning from new types of digital content like physiological data (e.g., workouts) to physical things like apartments and work tools (" sharing economy "). To understand whether mobile platforms provide adequate support for such novel sharing services, we su...

Reliable weather estimation traditionally requires a dense network of meteorological measurement stations. The concept of participatory sensing promises to alleviate this requirement by crowdsourcing weather data from an ideally very large set of participating users instead. Participation may involve nothing more than downloading a corresponding ap...

In recent years there has been a growing interest in augmenting human cognition (attention, engagement, memory, learning, etc.) through ubiquitous technologies. With the ongoing research and development of near-constant capture devices, unlimited storage, and algorithms for retrieval, the resulting personal data has opened the door to a vast range...

Recent technological improvements allow us to capture an increasing share of our everyday experiences, e.g. holi- days, shopping routines, or sports activities, and store them in a digital format. An interesting avenue to explore in this context is how reviewing such captured content can im- prove one’s memories of the original events. In this posi...

Contemporary public display systems hold a significant potential to contribute to in situ crowdsourcing. Recently, public display systems have surpassed their traditional role as static content projection hotspots by supporting interactivity and hosting applications that increase overall perceived user utility. As such, we developed WeatherUSI, a w...

Technology has always had a direct impact on what humans remember. In the era of smartphones and wearable devices, people easily capture information, such as pictures and videos, on a daily basis. The so-called "quantified self" movement focuses on using such captured multimedia information, often in combination with additional contextual data (suc...

Winter sports like skiing and snowboarding are often group activities. Groups of skiers and snowboarders traditionally use folded paper maps or board-mounted larger-scale maps near ski lifts to aid decision making: which slope to take next, where to have lunch, or what hazards to avoid when going off-piste. To enrich those static maps with personal...

The growing popularity of winter sports, as well as the trend towards high speed carving skies, have increased the risk of accidents on today's ski slopes. While many skiers now wear ski helmets, their bulk might in turn lower a skier's ability to sense their surroundings, potentially leading to dangerous situations. In this demo paper, we describe...

Several mobile and social media weather apps support the incorporation of human input in increasing their coverage and accuracy of current weather conditions. This practice is also known as participatory sensing: the act of using sensors (i.e. smartphones) carried by volunteers to acquire highly localized measurements of physical phenomena. In orde...

In this position paper, we propose a public display app that runs on a University's public display network, for gathering information on student wellbeing, as derived from measuring in-situ heart rate levels. Using a fun on-screen interface, passers-by are invited to measure and anonymously report their stress level. The stress level is measured in...

Today, a wide variety of technologies and devices are available for skiers. Those gadgets perform a number of tasks to improve the overall skiing experience, such as collecting personal performance data, recording memorable moments, or assisting in communication with group members. In this position paper we outline our empirical findings from unstr...

This paper presents insights on driver’s User Experience (UX) in terms of systematically investigating predicted experience, actual experience, and recalled experience. By conducting a three-week field study with car commuters in two countries, we studied how frustration and anger differentiate in prediction, actual experience, and recall. Our resu...

Well-established self-reporting methods in HCI such as the Experience Sampling Method (ESM) prove rather limited for sampling in-car experiences, as they distract the driver from the primary task of driving. In this work we present eMotion, a mobile application that provides a lightweight alternative to Experience Sampling. eMotion uses the front a...

Life logging emerged as a way to capture and remember more mainly through pictures. However, as life logging becomes increasingly mainstream, the volume of captured content also increases but our capacity for reviewing diminishes. In order to limit picture taking on such devices to only the most memorable moments, we propose a biophysical driven ca...

With the mobile phone turning into a lifelogging device alongside with the prevalence of wearables, people are able to record, store, and make sense of their daily activities. Using such insights, applications can help monitor physiological data, motivate behavior change, but also create new ways to aid human memory: mobile devices not only allow u...

Contemporary psychology theory emphasizes that people are more likely to achieve planned behavior if they are reminded of previous good experiences of that behavior. In this position paper we describe the results of a pilot study exploring the experimental in-the-wild validation of these findings in the context of run exercises. Based on today's te...

In order to make public displays more attractive, recent work has begun to explore the concept of multi-application systems that allow passers-by to interactively choose from a set of display applications. However, the use of traditional desktop approaches (e.g., menus or tiles) for choosing an application in such circumstances is limiting, in part...

Motivated by the opportunity of using public displays to contribute to crowdsourcing, we developed WeatherUSI – an application that allows passers-by to provide subjective information about the weather, both currently and in the near future. In contrast to the input collected by an already fielded mobile app called Atmos, we envision the public dis...

Motivated by the novel paradigm of participatory sensing in collecting in situ automated data and human input we introduce the Atmos platform. Atmos leverages a crowd-sourcing network of mobile devices for the collection of in situ weather related sensory data, provided by available on-board sensors, along with human input, to generate highly local...

Today's abundance of cheap digital storage in the form of tiny memory cards put literally no bounds on the number of images one can capture with one's digital camera or camera phone during an event. However, studies have shown that taking many pictures may actually make us remember less of a particular event. In this position paper, we propose to r...

We introduce EmoSnaps, a mobile application that captures unobtrusively pictures of one’s facial expressions throughout the day and uses them for later recall of her momentary emotions. We describe two field studies that employ EmoSnaps in an attempt to investigate if and how individuals and their relevant others infer emotions from self-face and f...

While the Experience Sampling Method is considered the gold standard of in-situ measurement, researchers have highlighted its drawbacks, in disrupting participants' activities and providing limited insights to the remote researcher. We propose a mixed approach that combines field studies with systematic lab-based Experience Sampling in four steps:...

We introduce a platform for the rapid prototyping of proactive location-based service discovery, proactive location-based services are conceptual-ised along three broad categories: location-triggered services chain-triggered services, proximity-triggered services, and illustrated through a number of usage scenarios. We report on a workshop with des...

This paper introduces the use of electroencephalography (EEG) and eye tracking in exploring customer experiences in service design. These tools are expected to allow designers to generate customer journeys from empirical data leading to new visualization methods and therefore improvements in service design deliverables.

With the increasing emphasis on how mobile technologies are experienced in everyday life, researchers are increasingly emphasizing the use of in-situ methods such as Experience Sampling and Day Reconstruction. In our line of research we explore the concept of Technology-Assisted Reconstruction, in which passively logged behavior data assist in the...

a b s t r a c t With the increasing sophistication of mobile computing, a growing interest has been paid to locative media that aim at providing immersive experiences. Location aware narratives are a particular kind of locative media that aim at ''telling stories that unfold in real space''. This paper presents a study that aimed at assessing an un...

Current customer journeys only rely on qualitative data. The aim of this paper is to introduce quantitative measures of customer experiences for Service Design. An EEG and eye tracker to measure attention levels and eye behaviour were used in a case study to compare two scenarios of a customer journey. Although more research needs to be conducted,...