14 results on '"Konstantas, Dimitri"'
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2. A comparative analysis of simple ranking process and faire un Choix Adéquat method
- Author
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Zakeri, Shervin, Chatterjee, Prasenjit, Konstantas, Dimitri, and Ecer, Fatih
- Abstract
This paper focuses on a comparative analysis between two multi-criteria decision-making (MCDM) methods, called the Simple Ranking Process (SRP) and Faire Un Choix Adéquat (FUCA). Two examples are used to reveal the similarities and differences between these two methods. The findings established that both methods share the use of an internal ranking system as a fundamental procedure. However, beyond this commonality, significant differences distinguish these methods from each other. These differences include variations in the number of steps within their algorithms, distinct approaches used in executing the internal ranking system, discrepancies in the alternative scores, different behavior when dealing with complex decision-making problems, and differences in the generated rankings.
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- 2024
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3. Enhance daily live and health of elderly people.
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Kostopoulos, Panagiotis, Kyritsis, Athanasios I., Ricard, Vincent, Deriaz, Michel, and Konstantas, Dimitri
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HEALTH of older people ,EVERYDAY life ,PHYSICAL activity ,MENTAL illness ,WORK environment ,MOTIVATION (Psychology) - Abstract
As people get older, they tend to become more and more vulnerable to physical disabilities and mental illnesses. In order to prevent the deterioration of their quality of life we have created a system that helps elderly to sustain and extend their activities of daily living (ADL). Older people, especially those who may have just left the working environment, can suffer a sense of loss, particularly of value, purpose, confidence. This can lead to mood swings, isolation and possibly depression. The EDLAH2 (Enhance Daily Live And Health) project tries to combat these negative experiences of elderly people and give the opportunity for a fuller lifestyle. These older adults have a determination to live in their homes and enjoy living in their homes for as long as they can. The idea of the system presented in this paper is to bring an increased level of motivation, interest and engagement into areas that may be important but mundane. This results in a greater drive to be involved in this area of action and a positive feeling when rewards are achieved. EDLAH2 enables the continuity of motivation for elderly people. We set goals and achievements in line with realistic expectations for the older adults and importantly, we provide a guide to their well being improvement. Finally we utilize gamification in order to reinforce the elderly people to stay active and improve their well-being. [ABSTRACT FROM AUTHOR]
- Published
- 2018
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4. UltraSense: A Self-Calibrating Ultrasound-Based Room Occupancy Sensing System.
- Author
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Hammoud, Abbass, Deriaz, Michel, and Konstantas, Dimitri
- Subjects
INTELLIGENT sensors ,LINE-of-sight radio links ,ULTRASONIC imaging ,INTERNET of things ,INFORMATION technology - Abstract
Abstract: Smart sensing technologies play a key role in the core of smart systems, which form the rapidly evolving internet of things. In this context, buildings’ occupancy information is an important input that allows smart systems to be seamlessly aware of and responsive to the inhabitants, thus ensuring their comfort. In this paper we present UltraSense , an ultrasound-based room occupancy sensing system that relies on unsupervised learning, to automatically calibrate its parameters according to the room's environment. This ability avoids the need for manual calibration of the sensing system for each new environment. While commonly available occupancy detection technologies are limited to line-of-sight (LOS) conditions, UltraSense also operates in non line-of-sight (NLOS) scenarios. The proposed system was implemented and tested in order to characterize its performance. UltraSense was developed for the European research project SmartHeat in the frame of ambient assisted living. [ABSTRACT FROM AUTHOR]
- Published
- 2017
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5. Adaptive power switching technique for ultrasonic motion sensors
- Author
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Hammoud, Abbass, Deriaz, Michel, and Konstantas, Dimitri
- Abstract
Smart sensing technologies play a key role in the core of smart systems, which form the rapidly evolving internet of things. In this context, buildings’ occupancy information is an important input that allows smart systems to be seamlessly aware of and responsive to the inhabitants, thus ensuring their comfort. Ultrasonic motion sensors are used to obtain occupancy information of indoor spaces. Although they provide a high accuracy as compared to other sensors, like Passive InfraRed, they require a higher power consumption. In this work, we propose an adaptive power switching technique, which we call power hopping. This technique allows ultrasound motion sensors to optimize their transmitter power level, in order to best fit their surrounding environment. The objective is to reduce the overall energy consumption of these sensors. We have tested our method using a sensor prototype, and the results show that, depending on the sensor’s environment, a possible saving in the transmitter power can be achieved, which reached up to 78% in our experiments. We also derive an upper bound limit of the method’s convergence time, and we propose an automatic sensing method to detect potential changes in the sensor’s environment.
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- 2018
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6. F2D: A Location Aware Fall Detection System Tested with Real Data from Daily Life of Elderly People.
- Author
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Kostopoulos, Panagiotis, Kyritsis, Athanasios I., Deriaz, Michel, and Konstantas, Dimitri
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WIRELESS localization ,EVERYDAY life ,OLDER people ,USER interfaces ,COMMERCIALIZATION - Abstract
Falls among older people remain a very important public healthcare issue. In the majority of fall events external support is imperative in order to avoid major consequences. Therefore, the ability to automatically detect these fall events could help reducing the response time and significantly improve the prognosis of fall victims. This paper presents a practical real time fall detection system running on a smartwatch (F2D). A decision module takes into account the rebound after the fall and the residual movement of the user, matching a detected fall pattern to an actual fall. The last module of F2D is the location module which makes our system very useful for nursing homes that host elderly people. The fall detection algorithm has been tested by Fondation Suisse pour les Téléthèses (FST), the project partner who is responsible for the commercialization of our system. By testing with real data and achieving an accuracy of 96.01% we have a fall detection system ready to be deployed on the market and by adding the location module we can provide it to nursing homes for elderly people. [ABSTRACT FROM AUTHOR]
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- 2016
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7. Remote Monitoring for Healthcare and for Safety in Extreme Environments.
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Micheli-Tzanakou, Evangelia, Istepanian, Robert S. H., Pattichis, Constantinos S., Laxminarayan, Swamy, Nugent, Chris D., Jones, Val, Shashar, Nadav, Shaphrut, Oded Ben, Lavigne, Kevin, Rienks, Rienk, Bults, Richard, Konstantas, Dimitri, Vierhout, Pieter, Peuscher, Jan, Halteren, Aart, Herzog, Rainer, and Widya, Ing
- Abstract
The use of Body Area Networks together with various wireless communication technologies offers one approach for remote monitoring. Convergence of communication and computation functionality, specifically seen in programmable cell phones and in pocket computers with telephony functionality, gives a choice of implementation platforms for Body Area Networks with extra BAN communications carried over (terrestrial) wireless telephony or via satellite links. As sensors get smaller and cheaper and self-powering devices become a reality, telemedicine services based on these technologies will become more viable and more convenient to use. As well as serving patients in ordinary circumstances, remote monitoring has a special role to play in helping to maintain health, and even save life, for people who happen to live, work or play in various extreme environments. [ABSTRACT FROM AUTHOR]
- Published
- 2006
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8. Telematic Requirements for Emergency and Disaster Response Derived from Enterprise Models.
- Author
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Micheli-Tzanakou, Evangelia, Istepanian, Robert S. H., Pattichis, Constantinos S., Laxminarayan, Swamy, Nugent, Chris D., Widya, Ing, Vierhout, Pieter, Jones, Val M., Bults, Richard, Halteren, Aart, Peuscher, Jan, and Konstantas, Dimitri
- Published
- 2006
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9. Mobihealth: Mobile Health Services Based on Body Area Networks.
- Author
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Micheli-Tzanakou, Evangelia, Istepanian, Robert S. H., Pattichis, Constantinos S., Laxminarayan, Swamy, Lymberis, Andreas, Jones, Val, Halteren, Aart, Widya, Ing, Dokovsky, Nikolai, Koprinkov, George, Bults, Richard, Konstantas, Dimitri, and Herzog, Rainer
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- 2006
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10. Mobihealth: Mobile Services for Health Professionals.
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Micheli-Tzanakou, Evangelia, Istepanian, Robert S. H., Pattichis, Constantinos S., Laxminarayan, Swamy, Lymberis, Andreas, Jones, Val, Halteren, Aart, Dokovsky, Nikolai, Koprinkov, George, Peuscher, Jan, Bults, Richard, Konstantas, Dimitri, Widya, Ing, and Herzog, Rainer
- Abstract
The MobiHealth project ran for 22 months from May 2002. The main development focus was on the architecture, design and implementation of an m-health service platform to support mobile services for patients. The objective was to test out the potential of 2.5 and 3G communications to support mobile services. In the relatively short time of the project the phases covered were: user requirements, design and implementation of a generic health BAN including several specialisations of the BAN, and architecting of a generic m-health service platform. In addition trials and evaluation were conducted. At the time of writing the results of the evaluation are being compiled. Regarding mobile services for the professional user, the experience has demonstrated that the generic MobiHealth concept can be applied for the mobile professional user as well as for the patient user. Further development continues, targeted at a fully generic and evolvable m-health service platform supporting mobility for both patients and professionals and supporting personalised and evolvable services adaptable to the needs of different categories of users operating in dynamically changing contexts. [ABSTRACT FROM AUTHOR]
- Published
- 2006
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11. PlayMancer: Games for Health with Accessibility in Mind.
- Author
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KALAPANIDAS, Elias, DAVARAKIS, Costas, FERNÁNDEZ-ARANDA, Femando, JIMÉNEZ-MURCIA, Susana, KOCSIS, Otilia, GANCHEV, Todor, KAUFMANN, Hannes, LAM, Tony, and KONSTANTAS, Dimitri
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VIDEO games ,VIDEO games & children ,EDUCATIONAL technology ,MARKETING ,ADVERTISING ,LEARNING - Abstract
The term Serious Games has been used to describe computer and video games used as educational technology or as a vehicle for presenting or promoting a point of view. Serious games can be of any genre and many of them can be considered a kind of edutainment. Serious games are intended to provide an engaging, self-reinforcing context in which to motivate and educate the players towards knowledgeable processes, including business operations, training, marketing and advertisement. Serious games can be compelling, educative, provocative, disruptive and inspirational. The potential of games for entertainment and learning has been demonstrated thoroughly from both research and market. Unfortunately, the investments committed to entertainment dwarf what is committed for more serious purposes. In this feature, we will argue that the motives, incentives and expectations of the computer game industry differ from one cultural and economic environment to another. As the game industry is dominated by US companies, computer game products are targeting user groups mostly informed by the marketing departments of those companies. This process creates marginalised user groups and game types that are not addressed effectively by the computer game market. Accessible games and games for health comprise this underdeveloped niche. Research project PlayMancer is a multi-partner effort to tackle both of those issues in a coherent way. [ABSTRACT FROM AUTHOR]
- Published
- 2009
12. An application of augmented MDA for the extended healthcare enterprise
- Author
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Jones, Valerie M., Van Halteren, Aart, Konstantas, Dimitri, and Widya, Ing
- Abstract
Mobile health systems extend the Enterprise Computing System (ECS) of the healthcare provider by bringing services to the patient any time and anywhere. We propose a methodology for the development of such extended ECSs which applies a model-driven design and development approach augmented with formal Validation and Verification (V&V) to address quality and correctness and to support model transformation. At the University of Twente we develop context aware m-health systems based on Body Area Networks (BANs). A set of deployed BANs are supported by a server. We refer to this distributed system as a BAN System. Development of such distributed m-health systems requires a sound software engineering approach and this is what we target with the proposed methodology. The methodology is illustrated with reference to modelling activities targeted at real implementations. BAN implementations are being trialled in a number of clinical settings including epilepsy management and management of chronic pain.
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- 2007
13. Commercialization of Electronic Information
- Author
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Morin, Jean-Henry and Konstantas, Dimitri
- Abstract
Information dissemination is slowly moving from printed media to electronic media. However this step cannot be completed if the electronic commercialization of information does not provide the same guarantees against copyright infringement as with the printed media. In this paper we present the major requirement for the commercialization of electronic information and describe Hep, an agent-based framework we developed for the commercialization of arbitrary electronic documents over open networks. The Hep electronic document commercialization model follows the secure content encapsulation model and regards documents as programs (agents) that need to be executed in order to reveal their contents. This way the document provider can include arbitrary checks and controls against possible copyright infringement attempts.
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- 2000
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14. Physiological and Brain Activity After a Combined Cognitive Behavioral Treatment Plus Video Game Therapy for Emotional Regulation in Bulimia Nervosa: A Case Report.
- Author
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Fagundo, Ana Beatriz, Via1, Esther, Sánchez, Isabel, Jiménez-Murcia, Susana, Forcano, Laura, Soriano-Mas, Carles, Giner-Bartolomé, Cristina, SantamarÜa, Juan J, Ben-Moussa, Maher, Konstantas, Dimitri, Lam, Tony, Lucas, Mikkel, Nielsen, Jeppe, Lems, Peter, Cardoner, NarcÜs, Menchón, Jose M, Torre, Rafael de la, Fernandez-Aranda, Fernando, and Beatriz Fagundo, Ana
- Subjects
BRAIN physiology ,COGNITIVE ability ,BULIMIA ,VIDEO games ,BORDERLINE personality disorder ,DECISION making - Abstract
Background: PlayMancer is a video game designed to increase emotional regulation and reduce general impulsive behaviors, by training to decrease arousal and improve decision-making and planning. We have previously demonstrated the usefulness of PlayMancer in reducing impulsivity and improving emotional regulation in bulimia nervosa (BN) patients. However, whether these improvements are actually translated into brain changes remains unclear. Objective: The aim of this case study was to report on a 28-year-old Spanish woman with BN, and to examine changes in physiological variables and brain activity after a combined treatment of video game therapy (VGT) and cognitive behavioral therapy (CBT). Methods: Ten VGT sessions were carried out on a weekly basis. Anxiety, physiological, and impulsivity measurements were recorded. The patient was scanned in a 1.5-T magnetic resonance scanner, prior to and after the 10-week VGT/CBT combined treatment, using two paradigms: (1) an emotional face-matching task, and (2) a multi-source interference task (MSIT). Results: Upon completing the treatment, a decrease in average heart rate was observed. The functional magnetic resonance imaging (fMRI) results indicated a post-treatment reduction in reaction time along with high accuracy. The patient engaged areas typically active in healthy controls, although the cluster extension of the active areas decreased after the combined treatment. Conclusions: These results suggest a global improvement in emotional regulation and impulsivity control after the VGT therapy in BN, demonstrated by both physiological and neural changes. These promising results suggest that a combined treatment of CBT and VGT might lead to functional cerebral changes that ultimately translate into better cognitive and emotional performances. [ABSTRACT FROM AUTHOR]
- Published
- 2014
- Full Text
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