The Use of Reference Models in Business Process Renovation

Enterprise resource planning (ERP) systems are often used by companies to automate and enhance their business processes. The capabilities of ERP systems can be described by best-practice reference models. The purpose of the article is to demonstrate the business process renovation approach with the use of reference models. Although the use of reference models brings many positive effects for business, they are still rarely used in Slovenian small and medium-sized companies. The reasons for this may be found in the reference models themselves as well as in project implementation methodologies. In the article a reference model based on Microsoft Dynamics NAV is suggested. The reference model is designed using upgraded BPMN notation with additional business objects, which help to describe the models in more detail.ERP solution, reference model, businessprocess renovation, Microsoft Dynamics NAV, BPMN

The influence of different grinding aids on the characteristics of cement CEM V/A (S-V-P) 42,5 N LH

The graduation thesis is composed of two parts. In the first part a short description of cement manufacturing through history is presented. Technological process of cement manufacturing in the cement plant Lafarge Cement cementarna Trbovlje is shown, starting with separate extraction of limestone and marl in the Plesko quarry. This is followed by grinding of raw materials, burning of clinker, cement grinding and its distribution. Burning process is summed up and divided into individual processes of dehydration, decarbonization, precalcination, calcination, sintering and cooling. In addition to basic components pozzolanic additives, fly ash, calcined slate and water are also discussed here. Individual phases of the hydration process, which is a complex chemical and physical process of binding water and cement, are explained, in addition to the process of forming of clinker minerals and theivs influence on setting and hardening rate of cement paste. All cement types produced by the cement plant Lafarge Cement Trbovlje are also presented. The emphasis of this thesis is on the use of grinding aids – additives, which can improve the quality of cement and consequently its use. Grinding aids are divided into two groups, Process grinding aids (PGA), used for improving grinding efficiency, and Enhancing grinding aids (EGA), used for enhancing cement performance in addition to improving grinding efficiency. In the second part of the thesis, experimental work is presented. As the basis CEM V/A (S-V- L) 42,5 N LH type of cement or étalon, was used. A comparison of 13 grinding aids of different manufacturers was conducted. The following characteristics were tested: “ specific surface and fineness of cement, workability of cement paste, standard consistency, initial and final setting time, soundness of cement paste, early and late (after 28 days) flexuval and bending strength”. According to the results of the test, three of the best grinding aids were selected on the basis of effect versus price ratio

Web-based image editor

Images are made every day to keep memories, moments and share things we like. Individuals need to edit, change or add an artistic touch to a photo many times, but they can't seem to find an image editing application in order to do it. A web based image editing application was created for that purpose so that we can use it on any computer in order to quickly and effectively edit photos. The thesis describes the implementation of a web based image editing application with technology WebGL, which was used for better and faster image processing. The main topic of the paper describes the creation of a simple library for easier interaction with WebGL, which serves as a base for implementing the main part of the application. After basics are covered, the application architecture and data structures are described and the tools that manipulate those data structures are presented. With the help of implemented tools the user can change and edit images inside the browser