Methods of Database Schema Transformations in Support of the Information System Reengineering Process

Cilj istraživanja realizovanih u ovom radu, bio je je da se formalno opišu mogući pristupi transformacijama različitih opisa baza podataka iz jednog modela podataka u drugi i praktično provere kroz njihovu implementaciju u okviru jednog CASE alata, namenjenog projektovanju informacionih sistema i baza podataka. U skladu sa postavljenim ciljem definisan je metodološki pristup i softversko okruženje IIS*Ree koje omogućava visok nivo automatizacije procesa reinženjeringa informacionih sistema. Okruženje IIS*Ree, zasnovano na MDSD principima, kao krajnji rezultat generiše šemu baze podataka u izabranom ciljnom, konceptualnom ili implementacionom modelu podataka, kao i prototip aplikacije.The goal of the research presented in this paper is to formally specify approaches to transformation of database specifications between different data models. The transformations are then to be implemented and tested using a CASE tool for modelling information systems and databases. Following this goal, a methodological approach is defined together with a software named IIS*Ree that provides a high level of automation of the information system reengineering process. The IIS*Ree software, developed in accordance to MDSD principles, generates database schemas specified in a target, conceptual or implementation data model, as well as application prototypes

Methods of Database Schema Transformations in Support of the Information System Reengineering Process

Cilj istraživanja realizovanih u ovom radu, bio je je da se formalno opišu mogući pristupi transformacijama različitih opisa baza podataka iz jednog modela podataka u drugi i praktično provere kroz njihovu implementaciju u okviru jednog CASE alata, namenjenog projektovanju informacionih sistema i baza podataka. U skladu sa postavljenim ciljem definisan je metodološki pristup i softversko okruženje IIS*Ree koje omogućava visok nivo automatizacije procesa reinženjeringa informacionih sistema. Okruženje IIS*Ree, zasnovano na MDSD principima, kao krajnji rezultat generiše šemu baze podataka u izabranom ciljnom, konceptualnom ili implementacionom modelu podataka, kao i prototip aplikacije.The goal of the research presented in this paper is to formally specify approaches to transformation of database specifications between different data models. The transformations are then to be implemented and tested using a CASE tool for modelling information systems and databases. Following this goal, a methodological approach is defined together with a software named IIS*Ree that provides a high level of automation of the information system reengineering process. The IIS*Ree software, developed in accordance to MDSD principles, generates database schemas specified in a target, conceptual or implementation data model, as well as application prototypes

"Thermal diffusivity and electron transport properties of NTC samples obtained by photoacoustic method

Poster presented at the Seventh Yugoslav Materials Research Society Conference - YUCOMAT 2005, Herceg Novi, Crna Gora, September 12-16, 2005

A DSL for EER Data Model Specification

In this paper we present a domain specific language (DSL) for Extended Entity-Relationship (EER) data model approach, named EERDSL. EERDSL is a part of our Multi-Paradigm Information System Modeling Tool (MIST) that provides EER database schema specification at the conceptual level and its transformation into a relational data model, or a class model. EERDSL modeling concepts are specified by Ecore, one of the commonly used approaches to create meta-models. In the paper we present both textual and graphical notations of EERDSL. Since only few modeling constraints may be described at the level of abstract syntax, we use Object Constraint Language (OCL) to specify complex validation rules for EER models

Economic Growth and Institutional Quality in South East Europe

The paper researched the causal relationship between institutional quality measures and real gross domestic product growth (GDP) on the South East European (SEE) countries in the period 1996-2016. To achieve the aim of this research the panel techniques (the Dumitrescu-Hurlin noncausality approach) were used. The SEE suffers from very poor control of corruption, as well as significant political instability, the weak rule of law and poor government effectiveness. Our results indicate that there is unidirectional homogeneous causality between political stability and real GDP growth. Control of corruption leads to government effectiveness. The rule of law leads to control of corruption, and government effectiveness to political stability. Additionally, there is a bidirectional homogeneous causality between the rule of law and political stability. Thus, the research found some empirical evidence that stronger institutional measures cause higher economic growth

"Thermal diffusivity and electron transport properties of NTC samples obtained by photoacoustic method

Poster presented at the Seventh Yugoslav Materials Research Society Conference - YUCOMAT 2005, Herceg Novi, Crna Gora, September 12-16, 2005

Spektrofotometrijsko ispitivanje kompleksa između titanil oksalata i 3-hidroksiflavona u vodeno-etanolnoj smeši

It has been established, by the application of suitable spectrophotometric methods and pH-metric measurements, that titanyl oxalate anion and 3-hydroxyflavone (3HF) form a [TiO(C2O4)2(C15H9O3)2]4- complex. The investigation of the composition and the concentration stability constant of the complex were carried out in a 50 % aqueous ethanol solution at room temperature (20 °C), in the pH range from 1.9 to 9.0. The concentration stability constant of the complex, log β2, ranged from 16.65 at pH 5.0 to 13.96 at pH 7.0. The conditions for the spectrophotometric determination of 3HF by means of the complex formation were investigated in the concentration range from 2.5 x 10-5 to 3.0 x 10-4 mol dm-3 3HF.Korišćenjem pogodnih spektrofotometrijskih i pH-metrijskih metoda utvrđeno je da titanil oksalat i 3-hidroksiflavon (3HF) grade [TiO(C2O4)2(C15H9O3)2]4- kompleks. Ispitivanje sastava i određivanje koncentracionih konstanti stabilnosti ovog kompleksa vršeno je u 50 % etanolnom rastvoru, na sobnoj temperaturi (20 °C), u oblasti pH od 1,9 do 9,0. Izračunate vrednosti koncentracione konstante stabilnosti kompleksa, log β2, su u intervalu od 16,65 pri pH 5,0 do 13,96 na pH 7,0. Određeni su i uslovi za spektrofotometrijsko određivanje 3HF korišćenjem nagrađenog kompleksa u koncentracionom intervalu od 2,5 x 10-5 do 3,0 x 10-4 mol dm-3

Spektrofotometrijsko ispitivanje kompleksa titanil oksalat-morin u 50% v/v etanolu

The composition of the titanyl oksalat-morin complex was determined by spectrophotometric method of variations of equimolar solutions and by the mole ratios method. The investigation of the composition and the concentration stability constant of the complex were carried out in a 50% V/V ethanol. It was found that titanyl oxalate ion and morin form 1:2 complex. The concentration stability constant of the complex, logβ2 was calculated for the pH=6,0 (5.83), pH=7,0 (6.40) andpH=8,0 (7.35).Sastav titanil oksalat-morin kompleksa određenje spektrofotometrijskom metodom varijacija ekvimolarnih rastvora i metodom molarnih odnosa. Ispitivanje sastava i određivanje koncentracionih konstanti stabilnosti ovog kompleksa vršeni su u 50% V/V etanolu. Nađeno je da se formira kompleks TiO(C2O4)22-: morin = 1:2. Određene su koncentracione konstante stabilnosti kompleksa: log β2 = 5,83 (pH = 6,0), log β2 =6,40 (pH = 7,0) i log β2 = 7,35 (pH =8,0)

Intrinsic resistivity of sintered nickel manganite vs. powder activation time and density

Poster presented at the conference Fizika i tehnologija materijala (Physics and Technology of Materials), FITEM '07, Čačak, Serbia, August 6-8, 2007.Paper: [https://hdl.handle.net/21.15107/rcub_dais_208]Final results were published in the article [http://dx.doi.org/10.2298/SOS0801027S

Changes of Structural, Optical and Electrical Properties of Nickel-Manganite Ceramics Induced by Additional Mechanical Activation

Poster presented at the 10th International Conference and Exhibition of the European Ceramic Society, Berlin, June 17-21, 200