FUZZY LOGIC-BASED CONTROL OF THREE-DIMENSIONAL CRANE SYSTEM

The control of three-dimensional (3D) crane system represents one of the most widely challenging control problems. 3D crane system is used for lifting and moving loads horizontally, as well as lowering and realizing the gripper to the original position. In this paper fuzzy logic-based control of three-dimensional crane (3D) system is presented. Hence the system produces oscillations during moving loads, the main objective of the designed controller is to control the swing angle. As a plant for controller design, the bond graph model of 3D crane system is used. To verify the effectiveness of the proposed control method, several digital simulations with concrete values of parameters are performed using Matlab. The simulations results show that the proposed fuzzy logic control produce better performance in regard to the reduction of undesired oscillations.Key words: bond graph, 3D crane, Dymola, fuzzy control, modeling and simulation, Matlab/Simulin

The politics of performance: transnationalism and its limits in former Yugoslav popular music, 1999–2004

This paper examines transnational relations between the Yugoslav successor states from the point of view of popular music, and demonstrates how transnational musical figures (such as Djordje Balaševi?, Mom?ilo Bajagi?-Bajaga and Ceca Ražnatovi?) are interpreted as symbolic reference points in national ethnopolitical discourse in the process of identity construction. Another symbolic function is served by Serbian turbofolk artists, who in Croatia serve as a cultural resource to distance oneself from a musical genre associated by many urban Croats with the ruralization (and Herzegovinization) of Croatian city space. In addition, value judgements associated with both Serbian and Croatian newly composed folk music provide an insight into the transnational negotiation of conflicting identities in the ex-Yugoslav context. Ultimately the paper shows how the ethnonational boundaries established by nationalizing ideologies created separate cultural spaces which themselves have been transnationalized after Yugoslavia's disintegration

The effect of low-temperature plasma pretreatment on wool printing

The application of radio-frequency capacitively coupled plasma for the treatment of wool was studied. The influence of plasma parameters on the printing and mechanical properties of wool was determined. Results after plasma treatment and after conventional chlorination were compared and the wetting and swelling properties as well as the whiteness of wool were determined. Plasma treatment improved wool hydrophilicity while mechanical properties somewhat worsened. Improved wetting and swelling properties lead to considerable increase in the color yield of wool prints

Poor life habits: Risk factors for formation osteoporosis

The use of bone density measurements is of central importance for diagnosis, prognosis end the assessment of treatment of patients with osteoorosis. Risk factors are variables which significantly change expected absolute risk, that is, the probability of variable disease in a certain population. Aging and smoking are the most common listed risk factors for the development of osteoporosis. The aim of our work was to confirm the most common risk factors for osteoporosis. In our research work has processed a total of 88 smokers were divided into groups according to the number of cigarettes smoked and the length of smokers. Results showed that risk factors: poor life habits (smoking and use of coffee), are significantly represented on patients with osteoporosis. In order to timely implement treatment, we concluded based on the results, that there is a need actively look for presence of risk factors responsible for osteoporosis in our patients

Experimental and modelling study on strontium removal from aqueous solutions by Lagenaria vulgaris biosorbent

The shell of Lagenaria vulgaris (LV) plant was used as biosorbent for strontium removal from aqueous solutions. Chemical structure of the biosorbent's surface was characterized by the means of FTIR and Boehm's titrations. SEM-EDX technique was used to study the morphology and elemental composition of the material. The analyses pointed out to abundance of acidic functional groups which are charged in solution and hence responsible for ionic exchange of Sr(II) ions. Sorption was examined by varying initial concentrations of Sr(II) in solutions, sorbent's loadings, pH, and contacting times. Equilibrium of the process was attained in the first 10 min of contacting and followed pseudo-second order and Chrastil's kinetic models. It was established that sorption onto aLVB was heterogenous by nature and fitted well to Freundlich and Sips isotherm models with maximum sorption capacity of 29.55 mg g(-1). Sorption potentail was kept high after six cycles when acidic desorbents were used