Leonid V Stoimenov

Leonid V Stoimenov
University of Niš | NIS · Department of Computer Science

PhD

About

115
Publications
26,624
Reads
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874
Citations
Citations since 2016
30 Research Items
506 Citations
2016201720182019202020212022020406080
2016201720182019202020212022020406080
2016201720182019202020212022020406080
2016201720182019202020212022020406080
Additional affiliations
April 2014 - present
University of Niš
Position
  • Professor (Full)

Publications

Publications (115)
Article
Full-text available
Transparency evaluation in open government is a process of measuring the extent of transparency against a predefined set of indicators. In this paper, we address the existing initiatives regarding data and government transparency evaluation as two separate indicators and present the analysis of their advantages and drawbacks. Based on that analysis...
Article
Under influence of data transparency initiatives, a variety of institutions have published a significant number of datasets. In most cases, data publishers take advantage of open data portals (ODPs) for making their datasets publicly available. To improve the datasets' discoverability, open data portals (ODPs) group open datasets into categories us...
Article
Openness and transparency initiatives are not only milestones of science progress but have also influenced various fields of organization and industry. Under this influence, varieties of government institutions worldwide have published a large number of datasets through open data portals. Government data covers diverse subjects and the scale of ava...
Chapter
This paper focuses on real-time monitoring of open data in the Western Balkan countries and assessment of dataset quality using five star methodology introduced by Berners-Lee. We have designed a framework and an application prototype that uses existing Application Programming Interfaces (API) of open data portals to collect information in real-tim...
Article
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Big data analytics (BDA) in healthcare has made a positive difference in the integration of Artificial Intelligence (AI) in advancements of analytical capabilities, while lowering the costs of medical care. The aim of this study is to improve the existing healthcare eSystem by implementing a Big Data Analytics (BDA) platform and to meet the require...
Preprint
Full-text available
Big data in healthcare has made a positive difference in advancing analytical capabilities and lowering the costs of medical care. In addition to providing analytical capabilities on platforms supporting current and near-future AI with machine-learning and data-mining algorithms, there is also a need for ethical considerations mandating new ways to...
Article
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This article describes the low-voltage distribution network monitoring system developed for the Electric Power Industry of Serbia electricity distribution company. The implemented system is deployed in two different regional centers of the Electric Power Industry of Serbia and is being used in production for the past 4 years. During this period, it...
Article
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This paper describes the enhanced LIRE (LInked RElations) architecture for creating relations between datasets available on open government portals. The architecture is improved to be applicable on different open government data platforms using minimal configuration at the Data processing layer. We evaluated the applicability of enhanced LIRE, its...
Conference Paper
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Observation of air pollution levels at certain points in space and time is done by using mobile and static sensor networks. The values of air pollution levels at points where no measurements were made are mostly assumed by numerous types of interpolation between known values at measured points. The authors of this paper propose techniques for predi...
Article
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Along teaching scientific research is second most important task for every university and faculty member. Research results are commonly published as journal papers, book chapters or as conference proceedings with the purpose to communicate the findings in academic circles, serve as promotion, or be used for tenure or reapplication. Maintaining the...
Article
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Interdependency of electric power grids and information and communication technology is a rapidly growing topic. With the introduction of Smart Grid, handling dynamic load tracking, dynamic tariffs, clients that can consume but also produce electricity that can be delivered to the grid has become a part of everyday operational cycles within power s...
Article
Government institutions have released a large number of datasets on their open data portals, which are in line with the data transparency and open government initiatives. With the purpose of making it more accessible and visible, these portals categorize datasets based on different criteria like publishers, categories, formats, and descriptions. Ho...
Article
The national e-health systems implemented in Serbia as ”MojDoktor” (MyDoctor) and in Macedonia as ”MojTermin” (MyAppointment) are based on the same integrated health information platform. Its architecture was designed to allow for process oriented development with agile methodologies. This methodology allowed for fast deployment and adoption, but a...
Conference Paper
The paper considers mining and analyzing data generated by Twitter social network, regarding content classification, language determination and sentiment analysis of tweets. Analyzes are based on geospatial tweets collected in timespan of four months within region Vračar in Belgrade, Serbia. All of collected data is first being preprocessed, filter...
Chapter
Full-text available
Connecting data that government releases in diverse domains, such as economy, statistics, environment, transportation, and medicine, as open data available on the web by using semantic web technologies, leads to linked open government data (LOGD). LOGD supports development of innovative, intelligent applications that improve openness and transparen...
Conference Paper
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Recently a new option that enables contributors to ask for review of their mapping was introduced into the iD editor in OpenStreetMap (OSM). In this paper we analyse changesets containing this review_requested=yes tag. All such changesets that were created in the first two weeks after the option was introduced were analysed. Given that the main rev...
Article
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Lightning detection networks installed throughout the world provide data for obtaining flash density maps and information about lightning discharges characteristics. According to the IEC 62858 Standard, lightning data for at least ten years is required to ensure that short time scale variations in lightning parameters are accounted for. LINET (Euro...
Article
E-government open data platforms use metadata to provide an adequate environment for the consumption of data released on these platforms. Metadata enable the machine processing of information in a structured manner. Given that it reveals details and context about data, metadata allow interpretation in unique way and offer semantics for open governm...
Article
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Being a part of civil engineering, limit state analysis represents a structural analysis with a goal of developing efficient methods to directly estimate collapse load for a particular structural model. As a theoretical foundation, limit state analysis uses a set of bound (limit) theorems. Limit theorems are based on the law of conservation of ener...
Conference Paper
Data in the healthcare industry is overwhelming, not only because of its volume but also because of its variety. In order to use such data, it needs to be pre-processed and integrated first. An additional problem is the visualization of such big data and making it valuable, readable and easier to come to the conclusions. This paper presents a syste...
Chapter
The implementation of e-Health or EHR systems at national level is a major challenge for any country in the world. This is due to complexity of the architecture of the technical solution, significant number of involved parties – institutions, professionals, patients, etc., but also because of the great changes that are made with the introduction of...
Conference Paper
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Different techniques can be used to detect plagiarism in the source code. However, they do not always give good results, especially when the code is deliberately altered to disguise the copied parts from different sources. This paper describes an approach that uses the syntax and semantic analysis of the code to perform the necessary pre-processing...
Conference Paper
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The e-health platform Pinga is an integrated health information system represents a central electronic system, in which all medical and health related information about patients, health workers, facilities, documents, and procedures is stored and processed. The platform is implemented in Serbia as MojDoktor (My Doctor), and Macedonia as MojTermin (...
Article
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In Volunteered Geographic Information (VGI) projects, the tagging or annotation of objects is usually performed in a flexible and non-constrained manner. Contributors to a VGI project are normally free to choose whatever tags they feel are appropriate to annotate or describe a particular geographic object or place. In OpenStreetMap (OSM), the Map F...
Conference Paper
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One of the most popular contemporary implementations of the Voluntary Geographic Information (VGI) paradigm is OpenStreetMap (OSM). OSM is a very popular project worldwide and is based on a large mapping community. The number of mapped objects and the level of details with which these objects are represented depends on a number of factors including...
Conference Paper
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Named entity recognition is a widely used task to extract various kinds of information from unstructured text. Medical records, produced by hospitals every day contain huge amount of data about diseases, medications used in treatment and information about treatment success rate. There are a large number of systems used in information retrieval from...
Article
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This paper proposes a new model of switching scalar quantization that besides the usual adaptation to the variance uses a switching technique for adaptation to the distribution of the speech signal source. By applying the new model a smaller quantization errors achieved in comparison to the conventional models with a usual adaptation.
Article
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The web has penetrated just about every sphere of human interest and using information from the web has become ubiquitous among different categories of users. Medicine has long being using the benefits of modern technologies and without them it cannot function. This paper offers a proposal of use and mutual collaboration of several modern technolog...
Conference Paper
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Linking open data in government domain, can lead to creation of new services and information as well as discovery of new ways to perform queries and get results in accessible, machine processable and structured manner. To reach the full potential of open government data more relations between data should be discovered. The interconnection of open g...
Article
Throughout the years, electric power utility companies have been relying on their massive multibillion worth infrastructure in the form of electric power network. Control and maintenance of the network has been usually done through a set of isolated systems where each one of them was in charge for their own subset of data. Latest changes in the mar...
Conference Paper
Full-text available
Student obligations imply writing a large number of homework assignments and term papers. Usually, they are submitted in electronic form. Checking papers for plagiarism isn’t an easy task. Quantity prevents teachers and professors to check all of them by hand. Therefore, there is a need for a system that will perform this task automatically. This p...
Article
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In this paper we will define and describe a novel approach for the development of context-driven Web Map solutions. Our approach relies on an architecture we define and present in this paper as an enhancement of GIS application interoperability platforms. The enhancement is performed through introduction of a specific architectural layer which enab...
Article
Due to advances in information, communication and sensing technologies, the amount of generated geospatial information is constantly growing. Since geospatial information is generated and made available over the Internet by different stakeholders, heterogeneity of geospatial data and geospatial data sources becomes inevitable. This heterogeneity of...
Conference Paper
Facebook has introduced a new ways for people to communicate and, at the same time, to share stories and experiences. Therefore, its usage in the area of e-Government becomes every day more and more important. In this paper we will give an overview of an application for collecting data from e-Government Facebook pages of Republic of Ser-bia which w...
Article
This paper presents a benchmark proposal for the Open Government and its application from the open data perspective using data available on the U.S. government's open data portal (data.gov). The benchmark is developed over the adopted Open Government conceptual model, which describes Open Government through data openness, transparency, participatio...
Chapter
Growing open data initiatives are offering different solutions for opening governmental data to the public. Open data platform solutions provide simple tools for enriching governmental portals with a data dimension. The new data-oriented shape of government inevitably imposes the need for the evaluation of government efficiency in light of open dat...
Conference Paper
Sentiment classification has various applications and information from social networks can be especially useful. In this paper we perform sentiment classification of Twitter messages, so called tweets. We compare several machine learning classification algorithms and try to improve results by using processing pipes that extract meaningful features...
Article
Full-text available
Electric power supply companies increasingly rely on enterprise IT systems to provide them with a comprehensive view of the state of the distribution network. Within a utility-wide network, enterprise IT systems collect data from various metering devices. Such data can be effectively used for the prediction of power supply network vulnerability. Th...
Conference Paper
Full-text available
VGI concept has been thoroughly explored in last few years, emphasizing its enormous capacities. Communities of volunteers are making contributions on daily bases, thus increasing the quantity as well as the quality of published data. Even more, through commenting, tagging, liking and recommending they leave valuable subjective data descriptions th...
Conference Paper
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Introduction Lately, the geo-data collection process based on the concept of Volunteered Geo Information (VGI)[4] is massively exploited by all relevant stakeholders in the field of GIScience including private companies, Non-Government and even Government sector. It can be said that the current development in the field of Web and mobile technologie...
Article
In this paper, we introduce our solution for mapping local ontologies to relational and object‐oriented representations. This solution is part of the GeoNis framework for the interoperability of geo‐information systems applications in a local community environment. The GeoNis framework is based on a hybrid ontology approach for data integration. Th...
Chapter
Attaining highly efficient e-Government in developing countries is a true challenge. These countries are struggling with many internal issues that are preventing them from providing budgetary resources for investing in ICT infrastructure and staff education, developing strategies and enacting laws and policies. However, having in mind the benefits...
Conference Paper
Full-text available
Introduction Nowadays, most people usually carry sophisticated sensing devices which can be utilized in order to extend existing and create new sensor networks [1]. These sensing devices are mobile phones which become the most used mobile devices for fulfilling everyday computing and communication needs. Mobile phones are lately equipped with a ric...
Conference Paper
Full-text available
Data mining in e-government is the process of translating data from government web site in useful knowledge that can provide various types of support in decision making. Data mining can be applied to any type of data, but we have chosen to use this technique on open government data. Open data is a new concept in the development of e-government. It...
Article
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This paper deals with representation of scientific references' data and visual analysis of this data using web based scientific reference management software. The Reference application, is a web based reference management software, that enables easy administration and management of authors and scientific references. Similar web based reference mana...
Chapter
The new technological era is imposing new rules and challenges in e-society, dramatically changing the structure and organization of e-communication. These challenges are not meant to be an obstacle but a way for introducing new and better environment for the involvement of citizens and their participation in diverse areas of public interest, inclu...
Article
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This paper tracks the development of e-government towards the e-government 2.0 concept under the influence of WWW innovations and provides insight in how strategic goals of e-government 2.0 can be achieved in the Web 2.0 era. Although Western countries progress rapidly in achieving more open, participatory and transparent relations with users, by a...
Article
This paper presents extended GinisSense architecture applied for the prediction of electric power supply system behaviour. The original Ginis- Sense architecture is a Sensor Web based architecture for collecting, processing, analyzing, decision making and alerting based on the data received from heterogeneous data sources. This architecture was ext...
Article
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Traditional configuration-based product family modeling techniques do not yield favorable solutions for modeling the product families with the dominant product topology variations. This paper presents the case study for the modeling of variations of the product configuration, parameters, and topologies in mass production of custom windows and doors...
Article
The Internet as we know it today is not just a static source of information in which users are consumers only. It represents a more active and interactive service whose users have become major designers of the contents since they can control the development of this incredible resource. Blogs, social networks, video hosting services, wiki services,...
Article
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In this paper we present a concept and potential benefits of the symbiosis between a long-term personalized health monitoring system and the web based geographic information systems. Big data collected during employment of a long-term personalized health monitoring systems enables the prediction of individuals' health trends. The personalized healt...
Conference Paper
Full-text available
E-government, as a product of information technology, enables more efficient delivery of government services and contributes to better transparency and accountability of the government administration. One of the main tasks of government is to introduce a platform with high efficiency and good performance that will provide access to information of p...
Article
This paper analyzes the switched models of the nonuniform scalar quantization of a speech signal adapted to the average power of a signal. A comparision of the proposed switched quantizers' performances for the forward and the backward techniques of adaptation in a wide range of signal variance is also presented in the paper. An analysis of the exp...
Conference Paper
University and faculty members spend much of their time on scientific discovery and research. Scientific papers, as product of their extensive work, are used not only for their acknowledgement in academic circles, but also as a term of their promotion, tenure or reapplication. Most of the time, composing the list of references on published work tur...
Conference Paper
Full-text available
Modern societies are based on knowledge and constant improvement and learning are necessary for person to keep track with civilization development. Today, people are more mobile, spending more time in transportation, changing places constantly. The way of life dictates the way we learn. Therefore, education methods evolve and new technology provide...
Conference Paper
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Data fusion has been important field of exploration, brought to light under the influence of new technologies and the emerging need for information integration and knowledge extraction from heterogeneous data sources. The main focus of this paper will be set particularly on sensor data fusion. Our current focus is on designing and developing an int...
Conference Paper
Company’s geospatial data precision is the key issue for analysis, decision making and management using Geographic Information Systems (GIS). Mobile GIS applications should provide increased precision of geospatial data acquisition transferring acquisition process directly in the field. Increased geospatial data quality during acquisition could be...
Conference Paper
Full-text available
This paper presents GinisED – geo-information system which is developed to support control and management of electric low-power supply network. But introducing a GIS into a business process of utility company will not cause change to occur if it is viewed merely as a replacement for manually drawn circuit maps. Besides describing standard GIS tool,...
Conference Paper
Full-text available
Retrieving and managing data in real time from Supervisory Control and Data Acquisition (SCADA) systems through Web GIS applications has become a necessity for every power supply company. This paper presents one way of dealing with these requests using Sensor Web concept. The solution is given as integration of GINISED and GINISSENSE systemsinto a...
Article
Full-text available
Significance of business and technical information system integration in distribution utility using geographical information system (GIS) is presented in this paper. Motives for GIS base creation are depicted as basis for network operation improvement and loss reduction. Improvements of software for network planning and analysis that include GIS el...
Article
The implementation of eLearning systems, based on Community of practice, is recognized as a significant potential that can lead to effective social learning. In order to investigate the effects of social learning and the relationship between technology of social software and eLearning, we have created Scope - the project of developing Student Commu...
Article
The increased use of spatial data in the Internet has led to the emergence of a series of APIs/frameworks used for the development of different types of GIS systems. These solutions enable an effective implementation of the future GIS solution's basic structure to users who understand characteristics of each of APIs/frameworks. Therefore, this appr...
Conference Paper
In recent years, due to advances in science and technology, environmental issues have been rising, constantly requiring additional attention. Fumes, waste water, air pollution are just some of many problems the society’s dealing with today. We are now in position to use the same technology, that threatens to destroy basic environmental resources ne...
Conference Paper
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