Valentina Janev | University of Belgrade (original) (raw)

Papers by Valentina Janev

Abstract. This paper introduces and compares two innovative tools aimed at enhancing the collabor... more Abstract. This paper introduces and compares two innovative tools aimed at enhancing the collaborative work of the researchers and professionals from the West Balkan countries in the Semantic Web field. The first tool, the Alfresco system, is a version controlled content repository designed in REST architectural style and based on a set of document management and collaboration services. The Alfresco workflow engine enables organization and automation of the process activities. The second tool, the Semantic MediaWiki portal, is a semantic collaboration tool and knowledge management system that leverages the latest Semantic Web (SW) technologies and standards. By using semantic annotations, it enriches the Web contents with semantics and makes the knowledge explicit. Thus, it provides structured access to information and accurate and precise knowledge retrieval. This paper discusses the customization of these tools and their utilization in the Web Technologies for West Balkan countrie...

Semantic Web (SW) is an emerging research field that has application in different domains such as... more Semantic Web (SW) is an emerging research field that has application in different domains such as e-government services, richly interlinked library systems, Web search engines, enterprise knowledge stores, and other. The term “Semantic Web” refers to the World Wide Web Consortium’s (W3C) vision of the Web of linked data (called also the Web of Data) as “...an extension of the current Web in which information is given a well-defined meaning, better enabling computers and people to work in cooperation” (Berners-Lee, Hendler, & Lassila, 2001). Since then, many specifications, guidelines, languages, and tools have been developed that facilitate software development, improve performance and create new business opportunities.

e-drustvo.org

Page 1. PUBLIKOVANJE STATISTIČKIH PODATAKA KAO LINKED OPEN DATA PUBLISHING STATISTICAL DATA AS LI... more Page 1. PUBLIKOVANJE STATISTIČKIH PODATAKA KAO LINKED OPEN DATA PUBLISHING STATISTICAL DATA AS LINKED OPEN DATA Uroš Milošević, Valentina Janev, Mirko Spasić1, Jelena Milojković2 , Sanja Vraneš1 ...

The goal of this chapter is to shed light on different types of big data applications needed in v... more The goal of this chapter is to shed light on different types of big data applications needed in various industries including healthcare, transportation, energy, banking and insurance, digital media and e-commerce, environment, safety and security, telecommunications, and manufacturing. In response to the problems of analyzing large-scale data, different tools, techniques, and technologies have bee developed and are available for experimentation. In our analysis, we focused on literature (review articles) accessible via the Elsevier ScienceDirect service and the Springer Link service from more recent years, mainly from the last two decades. For the selected industries, this chapter also discusses challenges that can be addressed and overcome using the semantic processing approaches and knowledge reasoning approaches discussed in this book.

Energies

This paper analyzes the challenges and requirements of establishing energy data ecosystems (EDEs)... more This paper analyzes the challenges and requirements of establishing energy data ecosystems (EDEs) as data-driven infrastructures that overcome the limitations of currently fragmented energy applications. It proposes a new data- and knowledge-driven approach for management and processing. This approach aims to extend the analytics services portfolio of various energy stakeholders and achieve two-way flows of electricity and information for optimized generation, distribution, and electricity consumption. The approach is based on semantic technologies to create knowledge-based systems that will aid machines in integrating and processing resources contextually and intelligently. Thus, a paradigm shift in the energy data value chain is proposed towards transparency and the responsible management of data and knowledge exchanged by the various stakeholders of an energy data space. The approach can contribute to innovative energy management and the adoption of new business models in future ...

2020 28th Telecommunications Forum (TELFOR)

The European electricity system undergoes significant changes driven by the EU common rules for t... more The European electricity system undergoes significant changes driven by the EU common rules for the internal market for electricity, as well as by the climate action agenda. In addition to the balancing pan-European platforms that are under development, the European Commission supports different innovation initiatives for Smart Grids. In this paper some initial results from the PLATOON (Digital PLAtform and analytical TOOls for eNergy) projects are presents based on the specific objectives for supporting the modernization of electricity balancing services in Serbia. Main contribution of the study is the design of analytical services for more accurate load forecasting (as a central and integral process for planning), renewable energy sources production forecasting and calculation of effects of renewable energy sources integration.

Abstract. In the last few years, with the rise of the open data movement, a large and increasing ... more Abstract. In the last few years, with the rise of the open data movement, a large and increasing number of governments and organizations have started to make information freely available and easily accessible online. Additionally, in order to increase transparency and improve interoperability and interaction with citizens and society as a whole, but also create new businesses and job opportunities, national governments publish their data in a machine-readable and future-proof format. In this paper we present the LOD2 Statistical Workbench, an integrated set of professional tools for accessing, manipulating, exploring and publishing statistical data. The data representation and processing is based on the W3C standard vocabularies (RDF Data Cube as a main model) and open source components delivered by the LOD2 consortium. The system meets the needs of both pub-lishers and consumers of statistical data and directs the potential of the LOD2 tools to the specific domain of the statistica...

Second International Conference on Advances in Management, Economics and Social Science - MES 2015, 2015

At current, according to the precepts that govern our country, we have the Republic Constitution ... more At current, according to the precepts that govern our country, we have the Republic Constitution that has indicated that we live in a Rights and Justice Constitutional State, and with that Constitutional postulate we have article 33 where they mentioned legal text that refers that the work is a right and a social duty, so the work has been categorized in the right range so it is the State through its different functions that must guarantee all its inhabitants the right to have a job, either autonomous way or under dependency relationship as stated in Article 325 ibid. Already entering the subject article 326 from Ecuador Republic Constitution in its fifth paragraph provides that any person rehabilitated after an accident or illness, will have the right to be reinstated to work and maintain the employment relationship. Field research has shown that the right to maintain the employment relationship of a person rehabilitated after an accident at work or illness, has been constantly breached since at least the employer is to comply with the previously invoked Constitutional precept and this is where the present research project focuses on problem encountered evidence. The present research will be descriptive and bibliographical, because it is aimed at indicating how the variables are disaggregated, and at the same time it will be objectively applicable to offer a different and feasible proposal, applied to the situation of the problem raised. The research project is not only exhaustive with finding and highlighting the problem, but goes further, to the point of proposing a solution through a reformatory Bill to Article 195.1 of the Labor Code so that the same rules on the ineffective dismissal are applicable to the worker who has been rehabilitated after an accident at work or illness and does not want to be reinstated to work by his employer or his employer because of the constitutional principle of maintaining the employment relationship.

Data in the energy domain grows at unprecedented rates. Despite the great potential that IoT plat... more Data in the energy domain grows at unprecedented rates. Despite the great potential that IoT platforms and other big data-driven technologies have brought in the energy sector, data exchange and data integration are still not wholly achieved. As a result, fragmented applications are developed against energy data silos, and data exchange is limited to few applications. Therefore, this paper identifies semantic models that can be reused for building interoperable energy management services and applications. The ambition is to innovate the Institute Mihajlo Pupin proprietary SCADA system and to enable integration of the Institute Mihajlo Pupin services and applications in the European Union (EU) Energy Data Space. The selection of reusable models has been done based on a set of scenarios related to electricity balancing services, predictive maintenance services, and services for the residential, commercial and industrial sectors.

The Government 3.0 paradigm for government operations aims at making the public administration sy... more The Government 3.0 paradigm for government operations aims at making the public administration systems more service-oriented and delivering customised public services by opening and sharing government-owned data to the public and businesses. In the last five years many European countries put forward Government 3.0 as a new paradigm, and as a result, improved efficiency in the provision of public services, increased transparency and interaction with citizens and society as a whole, but also created new businesses across Europe. This study is motivated by the need to find better strategies for delivering the data from both local and national governments to the public in a powerful, machine-readable and future-proof format. We examine the case of Serbia, give an insight into the current state of affairs in the country, and discuss how both governmental agencies and the citizens of Serbia can benefit from the Directive on the re-use of Public Sector Information (2013/37/EU). We explore ...

ig Data Analytics is a crucial component of the Big Data paradigm and corresponds to the knowledg... more ig Data Analytics is a crucial component of the Big Data paradigm and corresponds to the knowledge extraction from an enormous amount of data. As the number of Big Data related methods, tools, frameworks and solutions is growing, there is a need to systematize the knowledge about the domain. Hence, in the LAMBDA project framework, an effort was made to develop a new set of lectures based on the education materials and courses offered by the University of Bonn and University of Oxford. This paper provides an overview of the LAMBDA training infrastructure and the open education contents developed so far, as well as initial evaluation about the possibilities for adoption of lectures at high-education institutions in the West Balkan countries.

2021 29th Telecommunications Forum (TELFOR), 2021

Lecture Notes in Computer Science, 2016

The Linked Data approach, based on principles defined back in 2006 and best practices for publish... more The Linked Data approach, based on principles defined back in 2006 and best practices for publishing and connecting structured data on the Web elaborated by ICT experts, can play an important role in the domain of semantic interoperability of government services. Therefore, this paper explores the technical aspects and challenges of implementation of the revised European Directive on the Public Sector Information (2013/37/EU) emphasizing the role of Linked Data approach for improved interoperability and re-use. Referring to state-of-the-art approaches in EU member states, the paper proposes a framework for implementing the PSI Directive in Serbia.

Web Semantics: Science, Services and Agents on the World Wide Web, 2016

Publishing and sharing open government data in Linked Data format provides many opportunities in ... more Publishing and sharing open government data in Linked Data format provides many opportunities in terms of data aggregation/integration and creation of information mashups. Statistical data, that contains various performance indicators and their evolution through time, is an example of data that can be used as the foundation for policy prediction, planning and adjustments, and can be re-used in different applications. However, due to Linked Data being relatively a new field, currently there is a lack of tools that enable efficient exploration and analysis of linked geospatial statistical datasets. Therefore, ESTA-LD (Exploratory Spatio-Temporal Analysis) tool was developed to address some of the Linked statistical Data management issues, such as crossing the statistical and the geographical dimensions, producing statistical maps, visualizing different measures, and comparing statistical indicators of different regions through time. This paper discusses the modeling approach that was adopted so that the published data conform to the established standards for representing statistical, spatial and temporal data in Linked Data format. The main contribution is related to the delivery of state-of-the-art open-source tools for retrieving, quality assessment, exploration and analysis of statistical Linked Data that is made available through a SPARQL endpoint.

2016 24th Telecommunications Forum (TELFOR), 2016

Big Data refers to data volumes in the range of Exabyte (1018) and beyond. Such volumes exceed th... more Big Data refers to data volumes in the range of Exabyte (1018) and beyond. Such volumes exceed the capacity of current on-line storage and processing systems. With characteristics like volume, velocity and variety big data throws challenges to the traditional IT establishments. Computer assisted innovation, real time data analytics, customer-centric business intelligence, industry wide decision making and transparency are possible advantages, to mention few, of Big Data. There are many issues with Big Data that warrant quality assessment methods. The issues are pertaining to storage and transport, management, and processing. This paper throws light into the present state of quality issues related to Big Data. It provides valuable insights that can be used to leverage Big Data science activities.

In order to improve efficiency in the provision of public services, increase transparency and int... more In order to improve efficiency in the provision of public services, increase transparency and interaction with citizens and society as a whole, but also create new businesses and job opportunities, both local and national governments need to find better strategies for delivering their data to the public in a powerful, machine-readable and future-proof format. We examine the case of Serbia, give an insight into the current state of affairs in the country, and show how both governmental agencies and the citizens of Serbia can benefit from Linked Open Data, a state of the art web-based technology that is promising to reshape the web itself. A working approach to publishing government data as Linked Data is demonstrated on the case of one of the largest data providers in the country, the Statistical Office of the Republic of Serbia. By cataloging the results in a local metadata repository, and scheduling periodical “harvesting” at an international level, both transparency and public ser...

e-drustvo.org

Energies

2020 28th Telecommunications Forum (TELFOR)

Second International Conference on Advances in Management, Economics and Social Science - MES 2015, 2015

2021 29th Telecommunications Forum (TELFOR), 2021

Lecture Notes in Computer Science, 2016

Web Semantics: Science, Services and Agents on the World Wide Web, 2016

2016 24th Telecommunications Forum (TELFOR), 2016

Proc. of 23rd Telecommunications Forum, TELFOR 2015, 2015

This paper addresses the technical aspects and challenges of implementation of the revised Europe... more This paper addresses the technical aspects and challenges of implementation of the revised European Directive on the Public Sector Information (2013/37/EU), emphasizing the role of Linked Data approach for improved interoperability and re-use. It points to several tools that have been developed at the Mihajlo Pupin Institute to support the implementation process i.e. the Serbian CKAN that can be used for cataloguing of open data, the RDF Data Cube Validation tool and the Exploratory Spatio-Temporal Analysis of Linked Data component for publishing and consuming of statistical data. The paper places a particular emphasis on the lessons learned and proposes recommendations for improving the interoperability of e-government services in Serbia.