Mogućnosti kompjuterske simulacije ortognatske hirurške procedure u terapiji nepravilnosti II skeletne klase

Aim: The aim of this study was to investigate the possibilities for computer-aided orthognathic surgery in the treatment of class II malocclusions. Materials and methods: Twelve patients treated at the Dept. of Orthodontics, School of Dentistry, Belgrade, were included in the study. Profile cephalometric analyses of all patients were conducted before and after the treatment. The first step was the profile cephalometric analysis before the treatment using the computer software Nemotec dental studio NX2005 and the second step was the computer-aided simulation using the same software. Results: The difference in the results was found in the soft-tissue analysis, which can be explained by the possibility of observing the instant changes in patients' profiles during the simulation of surgical treatment. Conclusion: Based on the results of the present study, it can be concluded that the computer-aided simulation provides a faster approach, a possibility to educate patients before the surgical treatment and a better clinician-patient communication.Cilj: Cilj ovog istraživanja je bio da se ispitaju mogućnosti kompjuterske simulacije hirurške procedure u terapiji nepravilnosti II skeletne klase. Materijal i metod: U ovom istraživanju obuhvaćeno je 12 pacijenata Klinike za Ortopediju vilica, Stomatološkog fakulteta u Beogradu. Korišćene su fotografije i profilni snimci glave svih pacijenata pre i posle završene terapije. Prva faza istraživanja podrazumevala je analiziranje profilnih snimaka glave pre terapije pomoću kompjuterskog programa Nemotec dental studio NX2005, a druga faza istraživanja podrazumevala je simulaciju hirurške terapije pomoću jedne od opcija koje ovaj kompjuterski program nudi. Rezultati: Razlika u rezultatima pre i posle kompjuterske simulacije dobijena je u analizi mekotkivnog profila upravo zbog mogućnosti posmatranja promena pacijentovog profila tokom simulacije hirurške metode. Zaključak: Na osnovu dobijenih rezultata može se zaključiti da kompjuterska simulacija pruža brži pristup informacijama, korisna je za edukaciju pacijenata sa mogućnostima hirurške intervencije i naravno, poboljšava komunikaciju kliničara sa pacijentima

Simulation of behaviour dynamics of the system for conversion of flow gas energy

Sustavno dinamičko simulacijsko modeliranje jedan je od najprimjerenijih i najdjelotvornijih znanstvenih načina modeliranja dinamike složenih, nelinearnih, prirodnih, tehničkih i organizacijskih sustava. Ta se metodologija u dosadašnjoj praksi pokazala valjanom pri rješavanju problematike upravljanja, osjetljivosti i fleksibilnosti dinamike ponašanja sustava koji imaju visoki stupanj složenosti, i to kompjutorskim simuliranjem, to jest “laboratorijski”, što znači bez opasnosti za promatrane realitete. Ovaj rad opisuje istraživanje dinamičkog procesa turbine koju pokreću plinovi i radne jedinice pumpe te je simulirana transformacija energije plinova u hidrauličnu energiju. Također se istražuje i matematički model sustava (turbine pokretane plinovima – centrifugalne pumpe – sustava tlaka u cjevovodu – spremišnog tanka).Systematic dynamic simulation modelling is one of the most adequate and the most successful scientific method for modelling dynamics of complex, non-linear, natural, technical and organizational systems. In former practice methodology of its work appeared to be an efficient means for solving problems regarding operation, behaviour, sensibility, flexibility of dynamics of system behaviour, having a high level of complexity, namely by a computer simulation, i.e. “in laboratory”, what actually means without endangering observed objects. This article deals with research of dynamic process in turbine, drivenby gases and in operating mechanical units of hydraulic pump and thus the transformation of gas energy into hydraulic energy, has been simulated. In this work, mathematical model of the system (turbine driven by gases – centrifugal pump – piping pressure system – holding tank), has been explored

SYSTEM DYNAMIC MODEL OF MARKETING IN HOTEL COMPANY

The subject of this paper is qualitative as well as quantitative system dynamics modeling of the marketing department in a hotel company. It is known that there is an increasing number of tourists in Croatia and also that in some regions hotel capacities are insufficient so hotel management has a major challenge to make decisions about increasing hotel capacities. The dynamic model, in this study, is oriented towards building new hotel capacities according to the increased demand. The paper describes a dynamic model of the marketing department of the hotel company that allows simulation of its dynamic behavior. The dynamics of events and the complexity of the process in the hotel company and the marketing department are shown with mathematical model, mental-verbal model and flow charts. The graphic of the system dynamic structural model of marketing department illustrates the important factors influencing the discrepancy between the desired and actual hotel capacity and between supply and demand for hotel capacities. The mathematical model enables practical insight into the dynamic behavior of the observed system, i.e. the analysis of the marketing department of hotel company and observation of mutual correlation between input, output and internal variables of processes occurring in the observed system

System Dynamics Simulation Modelling of the Impact of Technology Capital on Economic Growth of the Republic of Croatia

Razvoj znanosti i tehnologije ima veliku ulogu u ekonomskom rastu. U nekim razvijenim zemljama utjecaj tehnološkog rasta dosegnuo je 60 - 70% izmjereno u postotku u usporedbi s drugim čimbenicima. Tehnologija postaje glavna snaga ekonomskoga rasta. Znanost i tehnika, teorija i praksa sve se više povezuju u jedinstveni lanac što potiče daljnji razvitak tehnike i tehnologije, dakle stvara potrebu trajne inventivnoinovacijske aktivnosti. Globalizacija, a posebno globalizacija gospodarstva, izravan je rezultat znanstvenotehnološke revolucije. Njome se stvaraju veze i prostor za dalji razvitak proizvodnih snaga. Glavna je osnovica globalizacije tehnološki razvitak kojim se svijet prostorno i vremenski smanjuje uz kvalitativne i kvantitativne promjene u ekonomskom, političkom i kulturnom području.Sistemskodinamičko simulacijsko modeliranje jedan je od najprimjerenijih i najuspješnijih znanstvenih načina modeliranja dinamike složenih, nelinearnih, prirodnih, gospodarskih i tehničkih sustava. Ono omogućuje praćenje i procjenu utjecaja tehnološkog kapitala na gospodarski rast. Pri izradi sistemskodinamičkog simulacijskog modela utjecaja tehnološkog kapitala na gospodarski rast Republike Hrvatske izrađeni su: strukturni dijagram, mentalnoverbalni model i matematički model za vremensko razdoblje od 1999. do 2009. Budući da istemskodinamički simulacijski model omogućuje dobivanje odgovora na pitanja “što-ako”, postavljena su dva scenarija prema kojima se analizira gospodarski rast pod utjecajem promjene tehnološkog kapitala. Prvi scenarij daje odgovor na pitanje što bi se dogodilo s gospodarskim rastom Hrvatske u promatranom razdoblju da je bio prisutan stalni porast ulaganja u razvoj i istraživanje, u implementiranje tehnologije naprednih zemalja i u investicije.Drugi scenarij daje odgovor na pitanje što bi se dogodilo s gospodarskim rastom Hrvatske da je udio tehnološkog kapitala u ostvarenom gospodarskom rastu umjesto 0,1 (kakav je u Hrvatskoj) 0,39.The development of science and technology plays a major role in economic growth. In some developed countries, the impact of technological advancement has reached 60-70% relative to other factors. Technology has become the main force in economic growth. Science and technology, theory and practice have become increasingly linked forming a single chain, promoting further development of technology, thus creating a need for continuous innovation and invention activities. Globalization, in particular the globalization of the economy, is a direct result of the scientific and technological revolution which creates links and scope for further development of the productive forces. The underlying driving force of globalization is technological development which makes the world a smaller place, both in terms of space and time, bringing qualitative and quantitative changes to the economic, political and cultural fields. System dynamics simulation modelling is one of the most suitable and effective scientific methods for modelling the dynamics of complex, non-linear natural, economic and technical systems. It enables monitoring and assessment of the impact of technology capital on economic growth. In creating a system dynamics simulation model of the impact of technology capital on economic growth of the Republic of Croatia we have created a structure diagram, mental-verbal model and mathematical model for the period between 1999 and 2009. Since system dynamics simulation model provides answers to the “what if” questions, two scenarios were constructed to analyse the economic growth influenced by technology capital change. The first scenario gives an answer to the question what would have happened to the economic growth of Croatia in the relevant period had there been a steady increase in investment in research and development, the implementation of advanced technology and investment in general. The second scenario gives an answer to the question what would have happened to the economic growth of Croatia had the share of the technology capital in the achieved economic growth been 0.39 instead of 0.1 (as recorded in Croatia)

The Dynamic Management Model of Marine Engineers Educational System

Ovim radom predstavljen je simulacijski model edukacijskog sustava brodostrojara u svrhu lakšeg upravljanja razvojem. On je rezultat početnog istraživanja na znanstvenom projektu "Računarski simulacijski model pomorskog edukativnog sustava Hrvatske". Modelom je opisana njegova dinamika i utjecaj na okolinu, na osnovi kojeg se mogu izraditi scenariji razvoja. Ovako izrađen model, moguće je, uz male dorade, primijeniti i na druge edukacijske sustave koji imaju sličnu strukturu. Iz navedenog je vidljiva važnost izrade modela cjelokupnog visokog školstva pomoraca, a samim tim i cjelokupnog projekta.The paper presents the simulation model of marine engineers educational system in order to facilitate the development management. The paper has been the result of the preliminary research work "Computer Simulation Model of Croatian Maritime Educational System". The model describes its dynamic and the effects on the environment. This model (with small adaptation) can be applied to other educational systems with similar structures. All the above mentioned emphasizes the necessity to create the higher school maritime educational model together with the entire project

The Dynamic Management Model of Marine Engineers Educational System

Ovim radom predstavljen je simulacijski model edukacijskog sustava brodostrojara u svrhu lakšeg upravljanja razvojem. On je rezultat početnog istraživanja na znanstvenom projektu "Računarski simulacijski model pomorskog edukativnog sustava Hrvatske". Modelom je opisana njegova dinamika i utjecaj na okolinu, na osnovi kojeg se mogu izraditi scenariji razvoja. Ovako izrađen model, moguće je, uz male dorade, primijeniti i na druge edukacijske sustave koji imaju sličnu strukturu. Iz navedenog je vidljiva važnost izrade modela cjelokupnog visokog školstva pomoraca, a samim tim i cjelokupnog projekta.The paper presents the simulation model of marine engineers educational system in order to facilitate the development management. The paper has been the result of the preliminary research work "Computer Simulation Model of Croatian Maritime Educational System". The model describes its dynamic and the effects on the environment. This model (with small adaptation) can be applied to other educational systems with similar structures. All the above mentioned emphasizes the necessity to create the higher school maritime educational model together with the entire project

MATEJUŠKA

Tekst obrađuje povijesno značenje i prostorni smještaj prirodne uvale i spruda Matejuške. Analiziraju se sadržaji, uređenja, građenja i planovi koji su se u posljednja dva stoljeća događali na tom lokalitetu. Posebno se obrađuju aktivnosti u posljednjih deset godina, koje su rezultirale konačnim uređenjem tog prostora.The location and the historic importance of Matejuška for the city of Split is discussed in this paper. Matejuška is a small cove situated in the norht-west part of the Split harbour. The cove was formed between two reefs descending from the slopes of the Marjan hill towards the east. For a long time the cove has shielded fishermen’s boats against wind and waves.Despite the development and expansion of the city, Matejuška has preserved its traditions and held a special place in the hearts of the citizens of Split. This paper also analyzes all the activities, reconstructions and building plans that were carried out in Matejuška over the last two centuries. The particular attention is given to the activities carried out in the last ten years that resulted in the final reconstruction of the area. The sequence of events that eventually led to the final appearance of the area, is presented in the paper, as follows: failed tenders, conceptual plans, a conceptual design study and a reconstruction study of the area. The particular attention is given to the recent reconstruction work and various related issues. The entire area of Matejuška, from Tomića stine, Trumbićeva obala, the cove, the park, to the big and small pier, has been recently reconstructed. The surface of the entire area is 4,700 m2. In a smaller part of the area a small harbour for fishing boats and all related sport fishing activities is situated. Swimming and sport fishing club Lubin has been on this location since 1948. The remaining part belongs to the city of Split. The newly constructed plateau on the south side of the big pier, with the surface of 1,220 m2, is located in the very heart of the city harbour. The plateau offers a spectacular view of the city: the Split Riva, Diocletian’s Palace and the bell tower of the Cathedral of St. Duje, the patron saint of Split. It is designed to be a multi-purpose public area