Heart disease is one of the leading causes of deaths worldwide. Several methods have been developed by researchers to support medical diagnosis of heart disease, including artificial intelligence methods. In the past, committee machines have been shown to achieve higher classification accuracy than a single classifier. This study uses a committee of classifiers consisting of a combination of feed-forward multi layer perceptron (MLP) and radial basis functions neural networks (RBF) to diagnose heart disease. The output of the committee has been obtained based on majority voting. Several MLP training algorithms have been analyzed from the viewpoint of learning performance based on the network topology to find the network with the best prediction results. Cleveland heart disease dataset has been used throughout the experiments. The results show that the committee machine approach gives significantly better results than a single neural network. The classification accuracy obtained by the proposed method achieves a high accuracy rate of 95,4545%. This result is better than the results achieved by other methods that use Cleveland dataset reported in literature to this date.
Industrial heritage has a great importance in development of tourism of Tuzla Canton because this is a region which had well developed industry in the past. Major part of this industry has been destroyed and now can be used for touristic purposes Besides this function, industrial plants can be used for development of culture, education, etc., and we already have such positive examples in wealthier European countries. The aim of the survey was to examine the opinion of tourist agencies, which are providers of tourist services, on further development of tourism in the region of Tuzla Canton, with special emphasis on industrial tourism, because tourist agencies are one of the key factors in creation of tourism development. Methods used for data collecting, processing and analysis are: historical, descriptive, comparative, case study, survey (SPSS version 20). Elements that need improving and further development are highlighted. The research results can help the tourist destination management, in this case TC, but also all segments of the tourism industry of TC, improve their offer and communication with a potential tourism market.
Tuzla Canton (TC) has experienced a certain economic transformation and gradually started turning from an industrial region into a region of tertiary and quaternary activities, also notable in the strategic documents of the Canton. The present research was conducted during the years 2012 and 2013 with the aim of determining the attitudes of employees in the tourism sector of TC regarding the condition, i.e. the prospects of TC tourism. In July of 2012, using a structured questionnaire, persons employed in travel agencies and TC hotels were surveyed in relation to the following issues: what is, in their own opinion, the determining factor for a tourist in choosing a tour package in TC as a destination; how would they assess the tourist’s motives for choosing TC as a destination; how would they characterize (assess) the value factors of the TC tourist offer. The conducted research indicates that employees in the tourism industry have formed perceptions of TC as a tourist destination: it is a destination where tourists feel pleasant and happy to stay at; it has outstanding natural attractions, a welcoming environment and solid accommodation and catering potentials. However, elements that need improving and further development are highlighted as well. Methods used for collecting, processing and analyzing data are: historical, descriptive, comparative. Frequency analysis was conducted using the SPSS statistical program (version 20). The research results can help the tourist destination management, in this case TC, but also all segments of the tourism industry of TC, improve their offer and communication with a potential tourism market.
Koronarna srcana bolest (KSB) cesto se javlja u odrasloj populaciji. Osim sto predstavlja životno ugrožavajucu bolest, ona cesto nosi i rizik od razvoja stanja kao sto su kserostomija i stomatopiroza ; kserostomija uz to predstavlja i faktor rizika za naseljavanje gljive Candida albicans. Cilj ovog istraživanja bilo je utvrditi incidenciju kserostomije, stomatopiroze i infekcije Candidom albicans u skupini oboljelih od KSB, te rezultate usporediti sa zdravim kontrolama. Istraživanje je provedeno na uzorku od ukupno 292 pacijenta, 149 kontrola i 143 ispitanika u testnoj skupini. Procjenjivala se kolicina izlucene sline (stimulirane i nestimulirane), prisutnost stomatopiroze, te stupanj infekcije Candidom albicans, a dobiveni su i podaci o uzimanju lijekova. Kserostomija i stomatopiroza znacajno su se cesce javljale u skupini oboljelih, a njihova je incidencija bila vrlo visoka ; također u istoj skupini cesce su bile i infekcije Candidom albicans, no bez statisticke znacajnosti. Infekcija Candidom albicans bila je u skupini oboljelih od KSB znacajno povezana sa kserostomijom. Uzimanje određenih lijekova može objasniti pojavu kserostomije i stomatopiroze, ali samo u određenom postotku slucajeva. U svakodnevnoj praksi neophodno je uputiti pacijente i njihove lijecnike na mogucnosti dijagnoze i lijecenja navedenih patoloskih stanja.
This chapter describes the development of voltage control system of a synchronous generator based on neural networks. Recurrent (dynamic) neural networks are used, as a type that has great capabilities in approximation of dynamic systems. Two algorithms are used for training – Dual Heuristic Programming (DHP) and Globalized Dual Heuristic Programming (GDHP). The algorithms have been developed for the optimal control of nonlinear systems using dynamic programming principles.
Cilj: Mnoga objavljena istraživanja su dokazala umjerenu povezanost između pretilosti i parodontitisa. No, vecina ih je ukljucivala dijabeticare i pusace, te nijedna nije provedena na podrucju istocne Europe. Cilj ovog istraživanja bio je procijeniti povezanost između pretilosti i parodontitisa na uzorku pacijenata bez dijabetesa te nepusaca starosti 31-75 godina. Studija je bila presjecna. Metode: Ukupno je regrutirano 320 pacijenata Klinike za dentalnu medicinu Klinickog bolnickog centra Rijeka. Potpuni parodontni status uzet je za 292 osobe ; parodontitis je kategoriziran kao pocetni, umjereni i uznapredovali. Za svakog pacijenta su zabilježeni dob i spol, visina, težina, te razina obrazovanja. Parodontitis je bio uzet kao nezavisna varijabla dok je indeks tjelesne mase (engl. bodymassindex, BMI) bio zavisna varijabla. Rezultati: Parodontitis nije znacajno korelirao s BMI. No, analizom logisticke regresije dokazano je da pretile žene nižeg stupnja obrazovanja starosti 36-55 godina imaju 5-6 puta veci rizik od razvoja teskih oblika parodontalne bolesti. Zakljucak: Pretilost i parodontitis mogu biti povezani, i to u skupini slabo obrazovanih žena od 36 do 55 godina starosti. Istraživanje je provedeno u sklopu projekta financiarnog od strane Ministarstva znanosti, obrzovanja i sporta RH „Bioloski ucinci stomatoloskih materijala” broj 062-0650444-0442.
Cilj: Izmjeriti razliku elektricnog potencijala i pH u usnoj supljini pacijenata s erozivnim i neerozivnim oralnim lihen planusom (OLP) koji istovremeno u ustima imaju vise razlicitih dentalnih legura. Metode: U studiji je sudjelovalo 10 pacijenata s erozivnim OLP-om, 22 pacijenta s neerozivnim OLP-om i 29 kontrolnih ispitanika bez OLP-a. Svi ispitanici u usnoj supljini trebali su imati najmanje 2 razlicite legure – minimalno jedan amalgamski ispun i neku drugu dentalnu leguru. Razlika elektricnog potencijala mjerena je uporabom kompjutorski kontroliranog milivoltmetra, a pH sline uporabom pH indikatorskih papirica. Rezultati: Razlika elektricnog potencijala u pacijenata s erozivnim OLP-om iznosila je 120 (45 – 275) mV, u pacijenata s neerozivnim OLP- om 153 (45 – 230) mV, a u kontrolnih ispitanika 140 (45 – 265) mV. Kruskal-Wallisovim testom nije utvrđena statisticki znacajna razlika između skupina u razlici elektricnog potencijala (P = 0, 689). Između skupina nije utvrđena znacajna razlika u pH sline (P = 0, 322). Rasprava i zakljucak: Vrijednosti razlike elektricnog potencijala i pH sline u pacijenata s erozivnim i neerozivnim oblikom OLP-a ne razlikuju se od pacijenata koji ne boluju od OLP-a, sto sugerira da kod OLP-a nije potrebna zamjena amalgama.
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