Nikos Kalatzis

• Master of Science
• Research Associate at National Technical University of Athens

The technologies associated with the Internet of Things have great potential for application in the domain of food and agriculture, especially in view of the societal and environmental challenges faced by this sector. From farm to fork, IoT technologies could transform the sector, contributing to food safety, and the reduction of agricultural input...

One of the main obstacles towards the promotion of IoT adoption and innovation is data interoperability. Facilitating cross-domain interoperability is expected to be the core element for the realisation of the next generation of the IoT computing paradigm that is already taking shape under the name of Internet of Everything (IoE). In this article,...

Among the most important challenges towards the digitisation of agriculture is the high cost of technical equipment and the lack of smart farming systems’ capability to interoperate. This paper presents the gaiasenseTM solution which follows an innovative approach in offering smart-farming services as an inexpensive service with zero technological...

Smart farming based on Internet of Things (IoT) technologies enables crop farmers to collect real-time data related to irrigation and plant protection processes, aiming to increase production volume, improve product quality, and predict diseases, while optimizing resources and farming processes. IoT devices can collect vast amounts of environmental...

The increased use of pesticides across the globe has a major impact on public health. Advanced sensing methods are considered of significant importance to ensure that pesticide use on agricultural products remains within safety limits. This study presents the experimental testing of a hybrid, nanomaterial based gas-sensing array, for the detection...

This study introduces a geospatial comprehensive methodological system aimed at evaluating the suitability and need for agricultural digital solutions (ADSs) across Europe. This system integrates a diverse range of factors, including geophysical characteristics, climate patterns, and socioeconomic conditions, evaluated at regional- and farm-specifi...

The agrifood system faces a great many economic, social and environmental challenges. One of the biggest practical challenges has been to achieve greater data sharing throughout the agrifood system and the supply chain, both to inform other stakeholders about a product and equally to incentivise greater environmental sustainability. In this paper,...

This paper provides a short analysis on how and in what extend the satellite-based technologies and smart farming systems can act as new sources of information towards the realization of future CAP objectives. The report focuses on the integration of these new technologies in support of advanced decision making for the regional/national Integrated...

There is a growing need for remote identification of the crop types, which is a serious issue for policy makers and statistical accountants (i.e., agricultural inspectors and government agencies), for verifying the degree of validity of the information concerning the area and the type of each crop being cultivated. In this work, remote Sentinel-2 i...

Nowadays, peach farms, and agriculture in general, face intensified challenges linked to pest control and irrigation needs, due to the effects of climate change. A contemporary and effective approach to these challenges is presented herein, which is based on the utilization of a smart farming system specialized in peach cultivation, in the framewor...

This study presents the experimental testing of a gas-sensing array, for the detection of two commercially available pesticides (i.e., Chloract 48 EC and Nimrod), towards its eventual use along a commercial smart-farming system. The array is comprised of four distinctive sensing devices based on nanoparticles, each functionalized with a different g...

Recent market research has revealed a globally growing interest on documentaries that have now become one of the biggest content-wise genre in the movie titles catalog, surpassing traditionally popular genres such as comedy or adventure films. At the same time, modern audiences appear willing to immerse into more interactive and personalized viewin...

As part of its ongoing move to simplify and modernise the EU’s Common Agricultural Policy (CAP), the European Commission isadoptingnew rules that will for the first time expressly allow a range of modern technologies to be used when carrying out checks for area-based CAP payments. This includes the possibility to completely replace physical checks...

A Cyber-Physical Social System (CPSS) tightly integrates computer systems with the physical world and human activities. In this article, a three-level CPSS for early fire detection is presented to assist public authorities to promptly identify and act on emergency situations. At the bottom level, the system’s architecture involves IoT nodes enabled...

The more information users disclose to pervasive systems or social media, the better quality and enhanced experience they enjoy for a wider variety of personalised services. However, the privacy concerns of individuals that use such systems have dramatically risen the last years, especially after several events of massive security breaches in vario...

How time-series measurement of vegetation indices supports the provision of smart farming and agricultural monitoring services for Greek farmers and policymakers.

In recent years, there have been various research efforts aiming to investigate how social media are used to express or influence TV audiences and if possible to estimate TV ratings through the analysis of user interactions via social media. Given that, these efforts are still in their infancy, there is a lack of an established methodology for desi...

The importance of addressing interoperability challenges in Internet of Things (IoT) ecosystems is widely acknowledged. Inspired by the "experimentally-driven research" paradigm, this paper proposes a lightweight data interoperability mechanism the performance and efficiency of which are evaluated via experiments carried out on top of FIRE testbeds...

Unmanned Aerial Vehicles (UAV) facilitate the development of Internet of Things (IoT) ecosystems for smart city and smart environment applications. This paper proposes the adoption of Edge and Fog computing principles to the UAV based forest fire detection application domain through a hierarchical architecture. This three-layer ecosystem combines t...

The proliferation of social media enables the development of innovative services for extracting insights about audience behaviour dynamics. Social media analytics allow the identification of demographics and interests of audiences that are valuable data considered by content producers, in principle driving the overall multimedia production process....

Recent market research has revealed a globally growing interest on documentaries that have now become one of the most populated content-wise genre in the movie titles catalog, surpassing traditionally popular genres such as comedy or adventure films. At the same time, modern audiences appear willing to immerse into more interactive and personalized...

The more information users disclose to pervasive systems or social media, the better quality and enhanced experience they enjoy for a wider variety of personalised services. However, the privacy concerns of individuals that use such systems have dramatically risen the last years, especially after several events of massive security breaches in vario...

Testbeds and experimental network facilities accelerate the expansion of disruptive Internet services and support their evolution. The integration of IoT technologies in the context of Unmanned Vehicles (UxVs) and their deployment in federated, real–world testbeds introduce various challenging research issues. This paper presents the Semantic Aggre...

Testbeds and experimental network facilities accelerate the expansion of disruptive Internet services and support their evolution. The integration of IoT technologies in the context of Unmanned Vehicles (UxVs) and their deployment in federated, real–world testbeds introduce various challenging research issues. This paper presents the Semantic Aggre...

The more information users disclose to pervasive systems or social media, the better quality and enhanced experience they enjoy for a wider variety of personalised services. However, the privacy concerns of individuals that use such systems have dramatically risen the last years, especially after several events of massive security breaches in vario...

The convergence between mobile telecommunications and the Future Internet opened the way for the development of innovative pervasive computing services. The self-improving Personal Smart Spaces (PSSs) are coupling next generation mobile communications facilities with the features provided by the static smart spaces to support a more ubiquitous, mob...

Social networking is a dominant computing paradigm of the last decade that enables users to virtually interact and socialise, to collaborate and to share any kind of content. A drawback in current social networking systems is that they integrate poorly with the wealth of hardware and software resources that the users have access to locally or remot...

Proactive behaviour of pervasive computing systems cannot be realised without the establishment of suitable and reliable user intent prediction facilities. Most of the existing approaches focus on an individual end-user’s history of interactions and context in order to estimate future user behaviour. Recent trends in pervasive systems allow users t...

Pervasive computing and social computing are two major computing paradigms of this decade, which have evolved more or less in isolation from each other. Integrating pervasive systems with social media can enhance the users' experience and enable them to form pervasive communities with others that share similar interests, habits, profile, behaviour,...

During the last decade, social media have enjoyed meteoric success in bringing people together online. On the other hand, pervasive computing assists users in their everyday tasks, in a seamless unobtrusive manner exploiting the resources available in the user’s environments focusing on the needs of individuals. The time is ripe for the two paradig...

Context-awareness is one of the main aspects of pervasive computing environments. Recently, some social networking systems have also started to exploit context information. These two paradigms serve different purposes. Pervasive computing systems have been designed mainly to address the needs of individual users, thus neglecting the social nature o...

Recently, social networks have become the most prevalent IT paradigm in a way that the vast majority of Internet users maintain one or multiple social networking accounts. These accounts, irrespectively of the underlying service, contain rich information and data for the owner’s preferences, social skills, everyday activities, beliefs and interests...

The provision of pervasive computing services is a challenging research area. This paper elaborates on the notion of Personal Smart Spaces (PSSs) that allows the delivery of pervasive services to mobile users. PSSs aim to couple the facilities offered by next generation mobile communications with the features provided by the static smart spaces to...

The inherent context-awareness properties of pervasive computing and the need for efficient user profiling and location information management quickly made it obvious that context management would become a top priority requirement in telecommunications service platforms. What we now call social networking was ¿born¿ around the early-mid `00s, a tim...

Traditionally, pervasive systems are designed with a focus on the individual, offering services that take advantage of their physical environment and provide a context-aware, personalised user experience. On the other hand, social computing is centred around the notion of a community, leveraging the information about the users and their social rela...

Current research on pervasive computing is opening the way for convergence between mobile telecommunications and the Future Internet. This chapter introduces a novel approach to this convergence in the form of the self-improving Personal Smart Spaces (PSSs). PSSs aim to couple the facilities offered by next generation mobile communications with the...

One of the key objectives of a pervasive computing system is to provide appropriate support to enable the user to manage the increasingly complex environment surrounding her. This includes managing the ever-increasing number of devices which can be accessed wirelessly as well as the vast range of services at her disposal. The aim of the Persist pro...

Context management systems are expected to administrate large volumes of spatial and non-spatial information in geographical disperse domains. In particular, when these systems cover wide areas such as cities, countries or even the entire planet, the design of scalable storage, retrieval and propagation mechanisms is paramount. This paper elaborate...

Current research in pervasive computing, as well as in the fields of mobile telecommunications and device manufacture are opening the way for convergence between mobile telecommunications and the traditional Internet towards the Future Internet. The ubiquitous computing paradigm integrates information processing into the objects that surround us in...

This work gives an overview over the challenges for context management systems in Ubiquitous Computing frameworks or Personal Smart Spaces. Focused on the integration of context inference in today’s context management systems (CMSs) we address important design decisions for future frameworks. The inference system we have in mind is probabilistic an...

In a pervasive system it is essential to understa nd the intent of the user in order to predict his/her futu re behaviour. This in turn will help to minimise the user's admin istrative overheads and assist the user to achieve his/her go als. The aim of this paper is to present some aspects of how user i ntent may be handled. It focuses on the archi...

Pervasive computing [1] or as otherwise called Ambient Intelligence [2] aims to assist users in their everyday tasks in a seamless unobtrusive manner. In this framework, there have been various research initiatives aiming towards the design and realization of smart spaces [3] in homes, offices, universities, schools, hospitals, hotels, museums, and...

Pervasive computing envisions a world where people are surrounded by numerous communication and computing interconnected devices that are invisible and assist users in their everyday tasks in a seamless unobtrusive manner. Most pervasive computing research initiatives aim towards the realization of smart spaces, i.e. fixed spaces that provide perva...

In ubiquitous computing environments, context management systems are expected to administrate large volumes of spatial and non-spatial information in geographical disperse domains. In particular, when these systems cover wide areas such as cities, countries or even the entire planet, the design of scalable storage, retrieval and propagation mechani...

Pervasive computing systems need to be strongly proactive. Context-awareness contributes to this, thus minimizing human-machine interaction. Context-aware systems are greatly enhanced by the utilization of recorded history of the users' situations and interactions. In this paper, an approach is proposed for modelling, storing and exploiting history...

The emerging pervasive computing services will eventually lead to the establishment of a context marketplace, where context consumers will be able to obtain the information they require by a plethora of context providers. In this marketplace, several aspects need to be addressed, such as: support for flexible federation among context stakeholders e...

Context awareness is an essential cornerstone in future pervasive computing systems. It has the potential to greatly reduce the user attention and interaction bottlenecks, to give humans the impression that services fade into the background, and to support intelligent personalization features. Nevertheless, in order to create such an environment, a...