Dejan Lavbič

Dejan Lavbič
University of Ljubljana · Faculty of Computer and Information Science

PhD

About

38
Publications
11,902
Reads
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179
Citations
Additional affiliations
October 2013 - present
University of Ljubljana
Position
  • Professor (Assistant)
Description
  • Introduction to Information Systems
February 2010 - present
University of Ljubljana
Position
  • Research Assistant
Description
  • Introduction to databases
Education
October 2004 - March 2010
University of Ljubljana
Field of study
  • Rapid ontology development model based on rule management approach in business applications

Publications

Publications (38)
Article
Full-text available
Purpose The purpose of this empirical research is to investigate the impact of cooperative principle on information quality by making objects more relevant for consumer needs, in particular case Wikipedia articles for students. Design/methodology/approach We performed a quantitative study with participants being invited to complete an online sur...
Article
Full-text available
Today’s software industry requires individuals who are proficient in as many programming languages as possible. Structured query language (SQL), as an adopted standard, is no exception, as it is the most widely used query language to retrieve and manipulate data. However, the process of learning SQL turns out to be challenging. The need for a compu...
Article
Full-text available
The prevalence of different kinds of electronic devices and the volume of content on the Web have increased the amount of plagiarism, which is considered an unethical act. If we want to be efficient in the detection and prevention of these acts, we have to improve today's methods of discovering plagiarism. The paper presents a research study where...
Article
Full-text available
The traditional approach used to implement a business process (BP) in today's information systems (IS) no longer covers the actual needs of the dynamically changing business. Therefore, a necessity for a new approach of dynamic business process (DBP) modelling and simulation has arisen. To date, existing approaches to DBP modelling and simulation h...
Conference Paper
Full-text available
This article will discuss ongoing research about Information Quality (IQ). Raters evaluating various IQ dimensions (accuracy, completeness, objec-tivity…) of same object showed low agreement level, therefore making IQ not measurable. Increase of IQ measurability to sufficient level would present an opportunity for guidelines to replace information...
Article
Various smart applications, such as in the domain of smart construction, require the use of artificial intelligence (AI) based services. In order to support such environments, various AI/knowledge service provider and consumer ecosystems have started to emerge. Within such ecosystems, the goals are to improve the quality, reliability, dependability...
Article
Full-text available
Digital information exchange enables quick creation and sharing of information and thus changes existing habits. Social media is becoming the main source of news for end-users replacing traditional media. This also enables the proliferation of fake news, which misinforms readers and is used to serve the interests of the creators. As a result, autom...
Preprint
Full-text available
Digital information exchange enables quick creation and sharing of information and thus changes existing habits. Social media is becoming the main source of news for end-users replacing traditional media. This also enables the proliferation of fake news, which misinforms readers and is used to serve the interests of the creators. As a result, autom...
Article
Full-text available
In this crowdsourced initiative, independent analysts used the same dataset to test two hypotheses regarding the effects of scientists' gender and professional status on verbosity during group meetings. Not only the analytic approach but also the operationalizations of key variables were left unconstrained and up to individual analysts. For instanc...
Article
Od razvoja tehnologije veriženja blokov ter pristopov, kot so pametne pogodbe, je zanimanje za vključitev tovrstnih pristopov v obstoječe arhitekture računalništva v oblaku v vzponu. Pametne pogodbe so v splošnem porazdeljene aplikacije, ki omogočajo prenos digitalnih sredstev med pogodbenimi strankami po vnaprej dogovorjenih pogojih, so se izkazal...
Book
Full-text available
Stock prediction has always been attractive area for researchers and investors since the financial gains can be substantial. However, stock prediction can be a challenging task since stocks are influenced by a multitude of factors whose influence vary rapidly through time. This paper proposes a novel approach (Word2Vec) for stock trend prediction c...
Conference Paper
Full-text available
Stock prediction is a challenging and chaotic research area where many variables are included with their effects being complex to determine. Nevertheless, stock value prediction is still very appealing for researchers and investors since it might be profitable, yet the number of published research papers remains to be relatively small. The employme...
Preprint
Full-text available
Today, container-based virtualization is very popular due to the lightweight nature of containers and the ability to use them flexibly in various heterogeneously composed systems. This makes it possible to collaboratively develop services by sharing various types of resources, such as infrastructures, software and digitalized content. In this work,...
Article
Full-text available
Na spletu je veliko podatkov, ki so objavljeni na različnih mestih v različnih, nezdružljivih oblikah. Zaradi tega nad njimi ne moremo izvajati poizvedb. Iskanje odgovora na specifično vprašanje ponavadi terja iskanje po ključnih besedah, branje in tolmačenje vsebine. To lahko rešimo tako, da uporabimo povezane podatke. Problem pri tem je dostopnos...
Preprint
Full-text available
Due to numerous public information sources and services, many methods to combine heterogeneous data were proposed recently. However, general end-to-end solutions are still rare, especially systems taking into account different context dimensions. Therefore, the techniques often prove insufficient or are limited to a certain domain. In this paper we...
Article
Na spletu je veliko podatkov, ki so objavljeni na različnih mestih v različnih, nezdružljivih oblikah. Zaradi tega nad njimi ne moremo izvajati poizvedb. Iskanje odgovora na specifično vprašanje ponavadi terja iskanje po ključnih besedah, branje in tolmačenje vsebine. To lahko rešimo tako, da uporabimo povezane podatke. Problem pri tem je dostopnos...
Conference Paper
Full-text available
Plagiarism is considered as an unethical act. Over the past few years its rate has increased considerably due to a widespread access to electronic docu‐ ments on the Web. Existing tools for plagiarism detection are not efficient enough and if we want to successfully prevent these kind of acts we must improve today's plagiarism detection approaches....
Conference Paper
Full-text available
Event-driven architecture and complex event processing have become important topics in achieving business reactivity and proactivity. Even though many technologies to support this have been developed, there is still a need for providing support for complex events based on different levels of required expressivity. On the other hand, semantic techno...
Conference Paper
Full-text available
One of the goals of every news publisher is to prolong users' browsing sessions by convincing them to read additional content besides the initially requested. Consequently, most news publishers use recommendation engines to keep users engaged by recommending them content which they might like to read next. In this paper we present how to improve an...
Book
Full-text available
There are several data silos containing information about business entities and people but are not semantically connected. If in integration process of data sources trust management is also employed than we can expect much higher success rate in relations discovery among entities. Majority of current mash -up approaches that deal with integration o...
Conference Paper
Traditional information extraction (IE) tasks roughly consist of named-entity recognition, relation extraction and coreference resolution. Much work in this area focuses primarily on separate subtasks where best performance can be achieved only on specialized domains. In this paper we present a collective IE approach combining all three tasks by em...
Article
Full-text available
The lack of rapid approaches in ontology development led us to define Rapid Ontology Development (ROD) approach. The following approach includes the development process and constant evaluation of the steps in the process. The ROD approach was then applied to development of Financial Instruments and Trading Strategies (FITS) ontology. We pointed out...
Article
Full-text available
In this paper rapid ontology development with emphasis on facilitating development with constant evaluation of steps in the process of ontology development is presented. The review of related work pointed out that existing methodologies for ontology development are complex and high level of technical knowledge is required. Business users and develo...
Conference Paper
Full-text available
In this paper we employ Rapid Ontology Development approach (ROD) with constant evaluation of steps in the process of ontology construction for development of Financial Instruments and Trading Strategies (FITS) ontology. We show that ontology development process does not conclude with successful definition of schematic part of ontology but we conti...
Article
Full-text available
Current practice of backing up data is based on using backup tapes and remote locations for storing data. Nowadays, with the advent of cloud computing a new concept of database backup emerges. The paper presents the possibility of making backup copies of data in the cloud. We are mainly focused on performance and economic issues of making backups i...
Article
Full-text available
The increasing amount of information and the absence of an effective tool for assisting users with minimal technical knowledge lead us to use associative thinking paradigm for implementation of a software solution - Panorama. In this study, we present object recognition process, based on context + focus information visualization techniques, as a fo...
Article
Full-text available
For some decision processes a significant added value is achieved when enterprises’ internal Data Warehouse (DW) can be integrated and combined with external data gained from web sites of competitors and other relevant Web sources. In this paper we discuss the agent‐based integration approach using ontologies (DSS‐MAS). In this approach data from i...
Article
Full-text available
In this paper we propose facilitating ontology development by constant evaluation of steps in the process of ontology development. Existing methodologies for ontology development are complex and they require technical knowledge that business users and developers don't poses. By introducing ontology completeness indicator developer is guided through...
Article
Full-text available
Business decisions must rely not only on organisation’s internal data but also on external data from competitors or relevant events. This information can be obtained from the Web but must be integrated with the data in an organisation’s Data Warehouse (DW). In this paper we discuss the agent-based integration approach using ontologies. To enable co...
Conference Paper
Full-text available
Decision support in enterprises is gaining its importance in the age of Internet and e-business. While dealing with the need for fast response in the dynamic competitive environments and rapid increase of information available on various networks we propose multi-agent system approach to backend decision support. Research case study presented in th...
Article
Semantic Web rule languages play an important role in making Semantic Web valued and are gaining support. Rules can be used for describing declarative knowledge of ontology languages and to express restrictions or transformations that can include the portion of description logic. On the other hand rules can express policy enforcement, define respon...
Article
Full-text available
Matching and merging of data from heterogeneous sources is a common need in various scenarios. Despite numerous algorithms proposed in the recent literature, there is a lack of general and complete solutions combining different dimensions arising during the matching and merging execution. We propose a general framework, and accompanying algorithms,...

Questions

Question (1)
Question
The goal is to create kind of semantic web service solution that enables traversing HTML web page and give structured results in RDF.

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