The aqueous extract of the Helichrysum italicum leaves (HI) is tested as a corrosion inhibitor of an iron in a simulated acid rain using potentiodynamic polarisation, cyclic voltammetry and electrochemical impedance spectroscopy. Results of all electrochemical methods indicate an increase of a corrosion inhibition efficiency of the iron with the HI extract concentration. Maximum inhibition efficiency (~ 50 %) is obtained at 2.0 g L–1 HI extract. The inhibitive action is assumed to occur via an adsorption of the HI extract on the iron surface. Results indicate that the adsorption process is spontaneous and follows the Freundlich adsorption isotherm. According to the calculated ΔG value (~ 15 kJ mol–1), the corrosion inhibition of the iron occurs predominantly via a physisorption of the HI extract. The concentration of iron ions released into a solution, measured by atomic absorption spectrometry, is in accordance with the electrochemical results.

both in the prenatal and postnatal period2. The syndrome is like a big puzzle whose parts need to be carefully assembled to get a whole picture.2 Good multidisciplinary approach, proper communication and collaboration with parents and all physician’s involved are required in the diagnostic process. All available resources and tools are needed to increase diagnostic precision in the prenatal diagnosis of fetal syndromes.4

A voltage-controlled current amplifier/attenuator in a standard 0.35-<inline-formula> <tex-math notation="LaTeX">${\mu }\text{m}$ </tex-math></inline-formula> CMOS technology is presented. It is based on the resistive mirror method, using non-saturated MOSFETs. An open-loop design with no compensation capacitors provides a high stability and a small occupied chip area of 0.0126 mm². A current gain dynamic range of 513 (54.2 dB), a gain-bandwidth product of 1.78 GHz at the largest current gain of 35.9 dB, and a maximum power consumption of 250 <inline-formula> <tex-math notation="LaTeX">${\mu }\text{W}$ </tex-math></inline-formula> with a single supply voltage of 1.3 V are achieved. In addition, an AC current source has been designed, integrated on the same chip, and used as the input of the proposed voltage-controlled amplifier/attenuator.

Existing approaches to business process model-driven synthesis of data models are characterized by a direct synthesis of a target model based on source models represented by concrete notations, where the synthesis is supported by monolithic (semi)automatic transformation programs. This article presents an approach to automated two-phase business process model-driven synthesis of conceptual database models. It is based on the introduction of a domain specific language (DSL) as an intermediate layer between different source notations and the target notation, which splits the synthesis into two phases: (i) automatic extraction of specific concepts from the source model and their DSL-based representation, and (ii) automated generation of the target model based on the DSL-based representation of the extracted concepts. The proposed approach enables development of modular transformation tools for automatic synthesis of the target model based on business process models represented by different concrete notations. In this article we present an online generator, which implements the proposed approach. The generator is implemented as a web-based, service-oriented tool, which enables automatic generation of the initial conceptual database model represented by the UML class diagram, based on business models represented by two concrete notations.

New technologies are leading to changes in business models. Skills needed to perform most jobs are changing profoundly. Their acquisition and development are becoming crucial for the success and modernization of the labour market offering new forms of flexibility and security for job seekers, employees and employers. The era of automation necessitates the development of not only digital, but also social and emotional skills. Development of creativity, innovation, analytical and critical thinking, communication, negotiation and decision-making skills are gaining in importance. These skills, an integral part of entrepreneurship competence, are developed through entrepreneurship education. In today's world, this form of education is approached not only in the narrow sense, as a process of preparing for business creation, but also in a wider context, as a process of developing entrepreneurial mindset and skills and personal qualities that have universal application. There are several approaches, methods and models of entrepreneurship education. Serbia does not yet have a clearly defined strategy for developing this type of education. Aimed at providing recommendations for the selection of optimal solutions, an assessment study of the effects of the 'Student Company' method of entrepreneurship education, recognized globally as a model of good practice, was carried out within our education system. The research has shown that, according to the assessment of 175 teachers involved in the programme, the 'Student Company' method also gives excellent results in our country. This speaks in favour of its inclusion in all secondary schools in Serbia as an informal type of education.