Prediction of time series data for chaotic and web driven business transactions. Prediction technologies: linear regression, artificial neural networks, genetic algorithms and Quacol algebra. Dilemma in prediction technique: functional or... more
Prediction of time series data for chaotic and web driven business transactions. Prediction technologies: linear regression, artificial neural networks, genetic algorithms and Quacol algebra. Dilemma in prediction technique: functional or stochastic model. Fit composition of prediction functions – Quacol predictor model. Elaboration on rank exclusivity, on continuity of n-point graph and theorem on sign independent algebraic operations. Practical prediction data from chaotic behavior in a ferroresonant circuit. Elaboration on prediction of web driven trading process. Modeling prediction error in Quacol algebra using triangle inequality.
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In this paper, the transient stability of synchhronous generator installed in "Termoelektrana-Toplana" Osijek power plant in island and parallel network operatio is analyzed using "Transmission 2000" software. By... more
In this paper, the transient stability of synchhronous generator installed in "Termoelektrana-Toplana" Osijek power plant in island and parallel network operatio is analyzed using "Transmission 2000" software. By combining the matematical models of synchronous machine, turbine, regulation and protection system, as well as the parts of surrounding transmission and distribution networks, the system analysis using determined criteria is enabled, with results presented graphically.
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Prikazani izum je algoritam za izradu analitičkog modela procesa koji služi za otkrivanje jedne ili više skrivenih procesnih veličina. Iz ulaznih mjernih veličina procesa izdvajaju oni procesni modeli koji ukazuju na vodeće procesne... more
Prikazani izum je algoritam za izradu analitičkog modela procesa koji služi za otkrivanje jedne ili više skrivenih procesnih veličina. Iz ulaznih mjernih veličina procesa izdvajaju oni procesni modeli koji ukazuju na vodeće procesne veličine tako da se ispituje njihova kompatibilnost sa skrivenom procesnom varijablom. Izbacivanjem te vodeće procesne veličine postupkom renormalizacije ulaznih i referentnih ili ciljnih podataka dobivaju se rekombinacijom složeni modeli koji imaju to bolju kvalitativnu korelaciju sa skrivenom varijablom, što je poremećajna funkcija izrazitija
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Prikazan je algoritam za izradu nelinearnog analitičkog modela procesa. Konvergenciju modela osigurava postupak skaliranja procesnih varijabli, konačni broj ponavljanja uz ispitivanje konvergencije u kvantitativnom obliku. Konačni model... more
Prikazan je algoritam za izradu nelinearnog analitičkog modela procesa. Konvergenciju modela osigurava postupak skaliranja procesnih varijabli, konačni broj ponavljanja uz ispitivanje konvergencije u kvantitativnom obliku. Konačni model dobiva se pretvorbom varijabli iz kvalitativnog u kvantitativni oblik
Product quality concept in a ceramic tile plant is presented. Entropy and information content of measurement data is calculated. Several entropy concepts have been elaborated: Shannon entropy, 1D and 2D Carnap entropy. Because of plant... more
Product quality concept in a ceramic tile plant is presented. Entropy and information content of measurement data is calculated. Several entropy concepts have been elaborated: Shannon entropy, 1D and 2D Carnap entropy. Because of plant informational macrodynamics the dominance of 1D Carnap entropy of process data sources has been argued on measurement data of the kiln temperature profiles and press control parameter data. Obtained process entropies have been compared to normalized process data distributions such as Gaussian and uniform distribution.
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Ontologies of the dynamic distributed Web enterprises differ. Ontology engineers need a tool for ontology updating that is swift and simple. Therefore a simplistic distributed semantic web model (SDSW) is proposed. Added to the model is... more
Ontologies of the dynamic distributed Web enterprises differ. Ontology engineers need a tool for ontology updating that is swift and simple. Therefore a simplistic distributed semantic web model (SDSW) is proposed. Added to the model is an extension of the primary logic operators. Logic operators are viable on domain variables and describe the formation, evolution and updates of the ontologies with conflicting information. Knowledge Base over a specific conflict is formed that uses expert information in order to cover for the logic consistency. The measure of logic consistency is obtained which is based on the extension set of the primary logic operators. Algorithms for checking consistency are thus drastically shortened in the case of large number of object ontology variables.
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Role of quality control in industry, software engineering and government. Control schemes: measurement and actuator signals. Process time constants: material balance control, production control, quality control. The concept of quality... more
Role of quality control in industry, software engineering and government. Control schemes: measurement and actuator signals. Process time constants: material balance control, production control, quality control. The concept of quality assurance and quality culture. Control system as a simple teleonomic, purposeful, system. Kolmogorov definition of teleonomic entropy. Realization restrictions in Kolmogorov entropy calculation. Shannon entropy as system uncertainty measure. Carnap entropy measure by calculating Voronoi diagram of respective signal. Introducing one-dimensional Carnap entropy measure of quantitative signals. Pragmatic question in calculating Shannon entropy: lack of data in some data classes. Problems of Carnap 2D entropy: multiple data points, split-down of signal space, data resolution and calculation duration, interpretation of obtained results. Pragmatic questions in calculating ne-dimensional Carnap entropy of control signals: equivalency of entropy measures for sl...
The problem of ICT profit. Soul symptoms and technological transformations. The rise of new personal infrastructure. Denaturation of everyday life through different infrastructure types: a life dependent on the technology. Myths of... more
The problem of ICT profit. Soul symptoms and technological transformations. The rise of new personal infrastructure. Denaturation of everyday life through different infrastructure types: a life dependent on the technology. Myths of family, narcissism and love. Raised or educated computers: reanimation in the world of technology. Personal and holistic ICT.
Information and communication technology (ICT) is the technology area with the fastest knowledge doubling and this sector is the most propulsive of all human activities. At the same time ICT is an infrastructure support for all business,... more
Information and communication technology (ICT) is the technology area with the fastest knowledge doubling and this sector is the most propulsive of all human activities. At the same time ICT is an infrastructure support for all business, scientific and other public and social activities, thus it influences the technical progress and business development of all of these human activities. This paper compares data on ICT literacy in Croatia with those in EU countries. The focuses is on thorough exposition of the ICT sector in the region of Slavonia and Baranja compared with Zagreb and overall ICT sector in the Republic of Croatia that is growing over 7% in the long-term period. The measures are proposed for improvement of operations and better development of ICT sector in the Slavonia and Baranja region. The model is feasible for other Croatian regions.
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The problem of spam has great impact on the Internet users, it questions safety and usefulness of the use of electronic mail, its cost and time consuming, as well as the effectiveness of the Internet in general. In this work authors... more
The problem of spam has great impact on the Internet users, it questions safety and usefulness of the use of electronic mail, its cost and time consuming, as well as the effectiveness of the Internet in general. In this work authors analyze cost of spam and its law regulations (in Croatia and Europe) and with case report and simulation they
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Information and Communication Technology system’s user should be considered as system’s component, because user’s behaviour can significantly affect the system’s security level. The aim of this paper is to develop an assessment method for... more
Information and Communication Technology system’s user should be considered as system’s component, because user’s behaviour can significantly affect the system’s security level. The aim of this paper is to develop an assessment method for user’s potentially risky behaviour. Ontology and OWL symbolic language have been chosen in order to define the semantic model and to formalize the knowledge of the domain on "user’s potentially risky behaviour". The Evidential Reasoning algorithm has been chosen for assessment of user’s behaviour. The normalized results for assessment on user’s behaviour give an interval ranging from 0,066 for the "naïve" user to 1,000 for the "paranoid" system’s user which can be used for reference in future work. This paper shows how to use the Evidential Reasoning algorithm to evaluate the human part of a technical system, how to evaluate a group of users instead of an individual evaluation. Furthermore, conditions required to map t...
On line acces for free on (in Croatian): http://hrcak.srce.hr/index.php?show=toc&id_broj=2487 A presentation of genetic algorithm for solving the optimization problem of capacitor banks displacement in the power network has been given.... more
On line acces for free on (in Croatian): http://hrcak.srce.hr/index.php?show=toc&id_broj=2487 A presentation of genetic algorithm for solving the optimization problem of capacitor banks displacement in the power network has been given. Optimal displacement of capacitor banks is obtained using the criterium of minimal active power losses in network lines for existing capacitor banks. The proposed genetic algorithm has been adjusted for the optimization problem. An adaption of genetic algorithm has been done by more efficient individuals coding, by simplifying the selection type and by synergy of genetic crossover and mutation operators.
A presentation of genetic algorithm for solving the optimization problem of capacitor banks displacement in the power network has been given. Optimal displacement of capacitor banks is obtained using the criterium of minimal active power... more
A presentation of genetic algorithm for solving the optimization problem of capacitor banks displacement in the power network has been given. Optimal displacement of capacitor banks is obtained using the criterium of minimal active power losses in network lines for existing capacitor banks. The proposed genetic algorithm has been adjusted for the optimization problem. An adaption of genetic algorithm has been done by more efficient individuals coding, by simplifying the selection type and by synergy of genetic crossover and mutation operators.
The problem of ICT profit. Soul symptoms and technological transforma-tions. The rise of new personal infrastructure. Denaturation of everyday life through dif-ferent infrastructure types: a life dependent on the technology. Myths of... more
The problem of ICT profit. Soul symptoms and technological transforma-tions. The rise of new personal infrastructure. Denaturation of everyday life through dif-ferent infrastructure types: a life dependent on the technology. Myths of family, narcis-sism and love. Raised or educated computers: reanimation in the world of technology. Personal and holistic ICT. Keywords: quality of life, qualitative measure, personalized interface, computer educa-tion 1. ICT FRAMEWORK The huge world economy is constantly running after money. In order to survive managers think about being more competitive than their particular rivals. So they spend among other on computers and telecommunications. They have been told to do so by equipment providers. Every year companies all around the world spend more than $2 trillion on computer and communications equipment and services (ICT). Sooner or later they repeatedly conclude that their competitiveness is not ICT critical (Carr, 2004). It is only their fiction. ...
The paper describes two successive sets of experiments of low-power diode laser treatment of corn kernels and wheat seeds. First experiment was conducted by use of laser beam for excessive moisture removing from corn kernels. Second... more
The paper describes two successive sets of experiments of low-power diode laser treatment of corn kernels and wheat seeds. First experiment was conducted by use of laser beam for excessive moisture removing from corn kernels. Second experiment was conducted to determine influence of low power laser beam on mycotic population on wheat seeds. For proper doses indication seeds were artificially infected with various fungi, such as Penicillium, Fusarium, Alternaria, etc. in two intensities (high, low). The experiment was planned to establish the effect of laser treatment as compared to chemical treatment on sprouting efficiency, defined as percentage of total kernels that sprout after a specific incubation time, and on fungus survival, expressed as level of infection. An experimental conveyor belt system was build to expose the kernels / seeds to laser light in the latter case. Laser treatment was to some extent effective in increasing sprout efficiency and reducing fungus survival, alt...
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Product quality concept in a ceramic tile plant is presented. Entropy and information content of measurement data is calculated. Several entropy concepts have been elaborated: Shannon entropy, 1D and 2D Carnap entropy. Because of plant... more
Product quality concept in a ceramic tile plant is presented. Entropy and information content of measurement data is calculated. Several entropy concepts have been elaborated: Shannon entropy, 1D and 2D Carnap entropy. Because of plant informational macrodynamics the dominance of 1D Carnap entropy of process data sources has been argued on measurement data of the kiln temperature profiles and press control parameter data. Obtained process entropies have been compared to normalized process data distributions such as Gaussian and uniform distribution.
ABSTRACT The article presents measurement data of the municipal heating process. A definition of process target function with respect to total heating comfort by information synthesis is given. Modeling of the target function by means of... more
ABSTRACT The article presents measurement data of the municipal heating process. A definition of process target function with respect to total heating comfort by information synthesis is given. Modeling of the target function by means of a circular explicit AI tool is described. A decision on meaningful models by the consistency of the physical set-up is discussed.
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Abstract - This paper presents a method for detecting the small changes in image patterns applied on ceramic tiles using differential digital holography. Holograms are constructed from tile images using composition of spherical waves. One... more
Abstract - This paper presents a method for detecting the small changes in image patterns applied on ceramic tiles using differential digital holography. Holograms are constructed from tile images using composition of spherical waves. One hologram is created from ceramic tile with ...
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To assess the prevalence of injuries in elementary schools and determine specific risk groups of school-age children. According to the 1991 census, there were 6,398 children between 7 and 14 years of age in the study area of the former... more
To assess the prevalence of injuries in elementary schools and determine specific risk groups of school-age children. According to the 1991 census, there were 6,398 children between 7 and 14 years of age in the study area of the former Koprivnica district. During the 1992-1997 period, 354 children were injured in school. The registration of injured children was performed via structured questionnaires filled out at the emergency clinic and outpatient surgical clinic of the General Hospital in Koprivnica. The mechanism of accident and activities preceding it were categorized according to the Nordic Medico-Statistical Committee classification. Chi-square test was used to determine groups of school children at specific risk and a classification tree was made on the basis of minimum entropy values for age, sex, activity, and mechanism of injury. The highest injury rate of was recorded in 12-year-olds (21.7%). Upper extremities were most common site of injury (52.8%), whereas the most com...
Research Interests: Risk assessment, Adolescent, Probability, Schools, Humans, and 15 moreChild, Female, Croatia, Male, Risk factors, Prevalence, School health services, Chi Square Distribution, Risk Factors, Risk Assessment, Injury Severity Score, Child preschool, Rural Population, Medical and Health Sciences, and Population surveillance
Research Interests: Information Theory, Data Mining, Signal Processing, Time Series, Statistical Analysis, and 12 moreProcess Control, Statistical Process Control, Time series analysis, Decision Trees, Image Classification, Frequency, Feature Extraction, Decision Tree, Shape, Pattern Classification, Qualitative Analysis, and Control chart
Today, within the engineering design process, we have interactions between different design teams, where each team has its own design objective and continuous need to present and share results with other groups. Common engineering... more
Today, within the engineering design process, we have interactions between different design teams, where each team has its own design objective and continuous need to present and share results with other groups. Common engineering environments are equipped with ...
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The problem of spam has great impact on the Internet users, it questions safety and usefulness of the use of electronic mail, its cost and time consuming, as well as the effectiveness of the Internet in general. In this work authors... more
The problem of spam has great impact on the Internet users, it questions safety and usefulness of the use of electronic mail, its cost and time consuming, as well as the effectiveness of the Internet in general. In this work authors analyze cost of spam and its law regulations (in Croatia and Europe) and with case report and simulation they
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I. INTRODUCTION Digital holography has many aspects of applications [1-3]. The specific area of application that is of interest to us is the possible amplification of small differences between two image patterns. We have named this method... more
I. INTRODUCTION Digital holography has many aspects of applications [1-3]. The specific area of application that is of interest to us is the possible amplification of small differences between two image patterns. We have named this method differential digital holography (DDH). ...
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This paper presents the analysis of relationships between relative water levels on Drava and Danube river and water level inside the Nature park "Kopacki rit" during the summer 2002. Due to high complexity of complete system... more
This paper presents the analysis of relationships between relative water levels on Drava and Danube river and water level inside the Nature park "Kopacki rit" during the summer 2002. Due to high complexity of complete system under study, usual quantitative techniques couldn't be applied. Qualitative-quantitative analysis has set up some basic relationships and showed possibilities in dealing with complex water flooding systems. For the modelling procedure AI identification tool was used, based on circular qualitative-quantitative algebra.
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One way to enhance security, increase functionality and reduce costs of maintenance of the IT system is to reduce its complexity. In this work authors used Roger Sessions' methodology for complexity reduction of the enterprise... more
One way to enhance security, increase functionality and reduce costs of maintenance of the IT system is to reduce its complexity. In this work authors used Roger Sessions' methodology for complexity reduction of the enterprise architecture and by adapting it they develop methodology for complexity reduction of the IT system. One of the aims of the enterprise architecture is to maximize the business value delivered by the IT investment so it focuses on the relationship between an organization's IT architecture and its business architecture. Because of this tight relationship between enterprise and its IT system the adjustment of this methodology is possible. Three basic steps for the SIP (Simple Iterative Partitions) process are: partitioning of the system; simplification of the system and iteration between subsets of the system. Basics, importance and methodology of this method are more understandable to the technical engineers than to the different level managers. That is...