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Volatile compounds profile of scottish liqueuer Drambuie : diploma thesis
No full textDrambuie je tradicionalni liker od škotskog viskija, s dodatkom meda od vrijeska te začinskog i aromatičnog bilja. Receptura ovog likera odnosno udio pojedinih sastojaka je karakteristična za samog proizvođača. Specifičan okus i aroma ovog likera očituje se kroz posebnost korištenih sirovina, te niz biokemijskiih reakcija koje se odvijaju tijekom tehnološkog procesa proizvodnje posebice tijekom odležavanja i zrenja. Za izolaciju hlapljivih spojeva likera korištene su dvije metode: mikroekstrakcija vršnih para na krutoj fazi (HS-SPME) uz upotrebu tri vrste vlakana (plavo, roza i sivo) te ekstrakcija tekuće-tekuće pri čemu je korištena smjesa različitih organskih otapala (smjesa pentan:dietil-eter (1:2, v/v) i diklormetan). Analiza hlapljivih spojeva je izvršena vezanim sustavom plinska kromatografija-masena spektrometrija (GC-MS). Najzastupljeniji izolirani spojevi pripadaju višim alkoholima, esterima i terpenima.Drambuie is a traditional Scotch whisky liqueur, with the addition of heather honey and spices and aromatic herbs. The recipe of this liqueur, or the proportion of individual ingredients, is characteristic of the manufacturer. The specific taste and aroma of this liqueur is manifested through the uniqueness of the raw materials used, and a series of biochemical reactions that take place during the technological production process, especially during aging and ripening. Two methods were used to isolate the volatile compounds of the liqueur: headspace solid-phase microextraction method (HS-SPME) using three types of fibers (blue, pink and gray) and liquid-liquid extraction using a mixture of different organic solvents (a mixture of pentane:diethyl ether (1:2, v/v) and dichloromethane). The analysis of volatile compounds was performed using a coupled gas chromatography-mass spectrometry (GC-MS) system. The most abundant isolated compounds belong to higher alcohols, esters and terpenes
Contagion effect between fiat currency and cryptocurrency
No full textOvaj rad istražuje fenomen financijske zaraze, definirane kao povećanje povezanosti među tržištima nakon financijskog šoka, s fokusom na odnose između kriptovaluta i fiat valuta. S obzirom na globalnu povezanost ekonomija, razumijevanje širenja zaraze i njezinog utjecaja na financijsku stabilnost postaje sve važnije. Kriptovalute, kao novi financijski instrumenti, mogu značajno utjecati na globalne financijske tokove, čime istraživanje njihove povezanosti s fiat valutama postaje važnije. Iako se kriptovalute smatraju rizičnim investicijama, njihova uloga kao zaštitne imovine, diversifikatora ili sigurnog utočišta može varirati ovisno o tržišnim uvjetima.
Istraživanje se temelji na dnevnim podacima o cijenama Bitcoina i Ethereuma te indeksa fiat valuta USD-a, EUR-a i GBP-a u razdoblju od 2.1.2019. do 3.1.2023., s naglaskom na promjene prije i nakon početka pandemije COVID-19. Korištenjem DCC-MGARCH modela analizirane su dinamičke uvjetne korelacije dnevnih prinosa, dok je Kolmogorov-Smirnov test korišten za ispitivanje prisutnosti zaraze.
Rezultati su pokazali da su Bitcoin i Ethereum prije pandemije imali slabu negativnu korelaciju s USD-om, djelujući kao zaštita, dok su tijekom pandemije postali sigurnija utočišta. Prema EUR-u, korelacija je ostala blizu nule, što ih također pozicionira kao zaštitu. U odnosu na GBP, pokazali su slabe pozitivne korelacije, čineći ih diverzifikatorima.
Kolmogorov-Smirnov testovi su otkrili su dominaciju kriznog razdoblja nad pretkriznim za parove EUR-ETH, GBP-BTC i GBP-ETH, što ukazuje na prisutnost zaraze između ovih valuta. GBP-BTC je pokazao najizraženiju zarazu, dok su EUR-ETH i GBP-ETH imali manje izražene razlike u distribucijama, sugerirajući blagu zarazu. Suprotno tome, za parove USD-BTC, USD-ETH i EUR-BTC nije pronađena zaraza.This paper explores the phenomenon of financial contagion, defined as the increased interconnectedness among markets following a financial shock, with a focus on the relationships between cryptocurrencies and fiat currencies. Given the global interconnectedness of economies, understanding the spread of contagion and its impact on financial stability is becoming increasingly important. Cryptocurrencies, as new financial instruments, can significantly influence global financial flows, making the study of their connection with fiat currencies more crucial.
The research is based on daily price data of Bitcoin and Ethereum, as well as fiat currency indices USD, EUR, and GBP, from January 2, 2019, to January 3, 2023, with an emphasis on changes before and after the onset of the COVID-19 pandemic. Using the DCC-MGARCH model, dynamic conditional correlations of daily returns were analyzed, while the Kolmogorov-Smirnov test was used to examine the presence of contagion.
The results showed that before the pandemic, Bitcoin and Ethereum had a weak negative correlation with USD, acting as a hedge, while during the pandemic, they became safer havens. Against EUR, the correlation remained close to zero, also positioning them as a hedge. In relation to GBP, they exhibited weak positive correlations, making them diversifiers.
The Kolmogorov-Smirnov tests revealed the dominance of the crisis period over the pre-crisis period for the pairs EUR-ETH, GBP-BTC, and GBP-ETH, indicating the presence of contagion. GBP-BTC showed the most pronounced contagion, while EUR-ETH and GBP-ETH had less pronounced distribution differences, suggesting mild contagion. Conversely, no contagion was found for the pairs USD-BTC, USD-ETH, and EUR-BTC
Seismic Calculation for a Dry-stacked Tower in the Italian Province of Ferrera : Master's Thesis
No full textU ovom radu prikazan je razvoj numeričkog modela s ciljem analize ponašanja građevinske konstrukcije pod djelovanjem potresa. Za potrebe istraživanja uzet je u obzir značajan potresni događaj koji se desio 1979. godine u mjestu Petrovac, smještenom u Crnoj Gori. Istraživanje je usmjereno na temeljitu analizu suhozidane konstrukcije. Analitički proračuni temelje se na primjeni kombinirane metode konačno-diskretnih elemenata. Kroz provedeno istraživanje dobiveni su rezultati koji prikazuju krajnja stanja konstrukcije, uključujući fazu potpunog.This study presents the development of a numerical model aimed at analyzing the behavior of a structural construction under the influence of seismic forces. For the purpose of this research, a significant seismic event that occurred in 1979 in Petrovac, located in Montenegro, has been taken into consideration. The research is focused on an in-depth analysis of a dry-stone masonry construction. Analytical calculations are based on the application of a combined finite-discrete element method. Through the conducted research, results have been obtained that depict the ultimate states of the construction, including the phase of complete collapse
Seismic Analysis of the Masonry Tower Ficarolo in Italy Using the Finite-discrete Elements Method : Master's Thesis
No full textU radu je prikazana analiza ponašanja zidanog tornja izloženog potresnom opterećenju uporabom kombinirane metode konačno-diskretnih elemenata. Za proračun su korištena 3 stvarna potresa i 4 rubna uvjeta. Numeričkom analizom provjerava se seizmička otpornost građevine i utvrđuje koji je način oslanjanja na podlogu najpovoljniji.The paper presents an analysis of the behavior of a masonry tower exposed to seismic loading using the combined method of finite-discrete elements. 3 real earthquakes and 4 boundary conditions were used for the calculation. Numerical analysis checks the seismic resistance of the building and determines which type of support on the ground is the most favorable
Corrosion inhibition of titanium by propolis in simulated oral cavity conditions : diploma thesis
No full textTitanij (Ti) je zbog svoje visoke otpornosti na koroziju, izvanredne biokompatibilnosti, mogućnosti repasivacije i odgovarajućih mehaničkih svojstava postao standardni materijal za izradu dentalnih implantata. Korozijska otpornost ovog materijala povezana je s prisutnošću zaštitnog oksidnog sloja na površini. Međutim, usna šupljina predstavlja složenu sredinu koja može negativno utjecati na korozijsku otpornost, dugotrajnost i integritet titanijskih implantata. Jedna od često primjenjivanih metoda zaštite metala od korozije je zaštita metala inhibitorima korozije. U ovom radu istraživan je utjecaj etanolnog ekstrakta propolisa na korozijsko ponašanje titanija u simuliranim uvjetima usne šupljine pri različitim temperaturama. Istraživanja su provedena elektrokemijskim metodama (metoda mjerenja potencijala otvorenog kruga, metoda linearne polarizacije i potenciodinamička polarizacijska metoda). Nakon slijeda elektrokemijskih mjerenja površinski slojevi Ti analizirani su optičkim mikroskopom, a dodatna analiza elektrolitnih otopina i površinskih slojeva Ti provedena je infracrvenom spektroskopijom s Fourierovom transformacijom tehnikom univerzalne prigušene totalne refleksije (FTIR-UATR). Dobiveni rezultati pokazuju kako je etanolni ekstrakt propolisa mješoviti inhibitor korozije Ti u simuliranim uvjetima usne šupljine. Najveća inhibitorska djelotvornost 78 % postignuta je pri 36 °C, a povećanjem temperature inhibitorska djelotvornost se smanjuje. Izračunate energije aktivacije i termodinamički aktivacijski parametri ukazuju na to da se inhibicija korozije Ti etanolnim ekstraktom propolisa odvija fizisorpcijom, a proces adsorpcije je endoterman. Metodom FTIR-UATR u slojevima na površini uzoraka Ti identificirane su funkcionalne skupine prisutne u propolisu.Titanium (Ti) has become the standard material for dental implants due to its high corrosion resistance, excellent biocompatibility, repassivation ability, and suitable mechanical properties. The corrosion resistance of this material is related to the presence of a protective oxide layer on its surface. However, the oral cavity is a complex environment that can adversely affect titanium implants' corrosion resistance, longevity and integrity. One of the most commonly applied methods for protecting metals from corrosion is the use of corrosion inhibitors. In this study, the effect of ethanolic propolis extract on the corrosion behavior of titanium in simulated oral cavity conditions at different temperatures was investigated. The research was conducted using electrochemical methods (open circuit potential measurement method, linear polarization, and potentiodynamic polarization method). Following a sequence of electrochemical tests, an optical microscope was used to analyze the Ti surface layers. After that, the electrolyte solutions and the Ti surface layers were further examined using Fourier transform infrared spectroscopy employing universal attenuated total reflectance (FTIR-UATR). The results indicated that an ethanolic propolis extract acts as a mixed-type corrosion inhibitor for Ti under simulated conditions in the oral cavity. The maximum inhibitory efficiency of 78 % was achieved at 36 °C; the inhibitory efficiency decreases with increasing temperature. The determined activation energies and thermodynamic activation parameters show that an ethanolic propolis extract inhibits the corrosion of Ti by physisorption with an endothermic adsorption process. The functional groups present in the propolis were identified in the layers on the surface of the Ti samples using the FTIR-UATR method
Knowledge management in company X
No full textU radu je analizirano upravljanje znanjem u Poduzeću X sa ciljem ispitivanja njegovih utjecaja
na različite aspekte organizacije. Koristeći korelacijsku analizu, utvrđeno je da ocjena metoda
upravljanja znanjem pozitivno korelira s osobnim razvojem zaposlenika i prijenosom znanja
među odjelima. Iako su ti odnosi značajni, ne postoji snažna povezanost između upravljanja
znanjem i skraćenja vremena isporuke proizvoda, kao ni između sustava i poticanja
inovativnosti. Deskriptivna statistika pokazuje da gotovo polovica zaposlenika sustav
upravljanja znanjem ne koristi redovito, što sugerira da postoji prostor za poboljšanje u
njegovoj integraciji u svakodnevne aktivnosti. Na temelju rezultata, hipoteza da sustav
upravljanja znanjem značajno smanjuje gubitak intelektualnog kapitala prilikom odlaska
ključnih zaposlenika je potvrđena, dok je hipoteza da poboljšava operativne aktivnosti i
skraćuje vrijeme isporuke djelomično potvrđena.The paper analyzes knowledge management in Company X with the aim of examining its
impact on various organizational aspects. Correlation analysis reveals that the assessment of
knowledge management methods positively correlates with employee personal development
and knowledge transfer between departments. Although these relationships are significant,
there is no strong link between knowledge management and reduction in delivery time or
between the system and innovation encouragement. Descriptive statistics indicate that nearly
half of the employees do not regularly use the knowledge management system, suggesting
room for improvement in its integration into daily activities. Based on the results, the
hypothesis that the knowledge management system significantly reduces the loss of
intellectual capital when key employees leave was confirmed, while the hypothesis that it
improves operational activities and reduces delivery time was partially confirmed
IMPLEMENTATION OF HEX GAME AND RELATED AGENTS
No full textU okviru ovog rada je implementirana igra na ploči Hex i pripadajući agenti umjetne inteligencije. Agent donosi odluke algoritmom minimax sa alfa beta podrezivanjem i dubinskim produbljivanjem ili algoritmom Monte Carlo tree search (MCTS). Također su implementirane skripte koje vode statistike pobjeda raznih kombinacija agenata sa parametrima dubine, vremenskog ograničenja i istraživačkih konstanti. Implementirano je korisničko sučelje koristeći Pygame biblioteku. U teorijskom dijelu rada obuhvaćen je pregled samih agenta i njihovih algoritama, analiza efektivnosti samih algoritama u okviru igre, detalji igre i korisničkog sučelja.Within this thesis is the implementation of the board game Hex and its corresponding artificial intelligence agents. Agent does its decision making via the algorithm's minimax with alpha beta pruning or Monte Carlo tree search algorithm (MCTS). Scripts for tracking win rate statistics of various combinations of AI agents with depth parameters, time limitations and exploration constants are also implemented. A user interface is also implemented using the Pygame library. In the theoretical section of the thesis is a detailed explanation of the agents, their algorithms, effectivenss analysis of said algorithms within the scope of the game, details about the game and the implementation of the user interface
The application of the Big Data concept in the knowledge management process
No full textIzvlačenje važnog znanja i informacija iz masivnih baza podataka otvara nove mogućnosti za donositelje odluka i druge dionike u društvu. Velike baze podataka sadrže mnoštvo informacija koje se mogu koristiti za prepoznavanje trendova, dobivanje novih perspektiva i prikupljanje ključnih podataka za informirano donošenje odluka. Ovaj rad istražuje upoznatost organizacija s konceptom Big Data te kako korištenje Big Data tehnologija može doprinijeti razvoju procesa upravljanja znanjem. Svrha rada je istražiti doprinosi li analiza velikih podataka inovacijama i boljim poslovnim odlukama unutar organizacija. Bez znanja, veliki podaci i analitika će propasti jer je upravo znanje omogućilo rast i ostvarivanje stvarnog potencijala velikih podataka. Stručnost ljudi igra važnu ulogu u pravilnim pristupima korištenim za prikupljanje i obradu podataka. Rezultati istraživanja pokazali su da organizacije trebaju ulagati u obuku zaposlenika jer primjena informacija dobivenih iz velikih podataka u operativnim, taktičkim ili strateškim područjima uvelike ovisi o ljudskom razumijevanju.Extracting valuable knowledge and information from massive databases opens up new opportunities for decision-makers and other stakeholders in society. Large databases contain a wealth of information that can be utilized to identify trends, gain new perspectives, and gather key data for informed decision making. This paper explores organizations' familiarity with the concept of Big Data and how the use of Big Data technologies can contribute to the development of knowledge management processes. The purpose of the paper is to investigate whether Big Data analysis contributes to innovation and better business decisions within organizations. Without knowledge, big data and analytics will fail, as it is precisely knowledge that has enabled the growth and realization of the true potential of big data. People's expertise plays a crucial role in the proper approaches used for data collection and processing. The research results have shown that organizations need to invest in employee training because the application of information obtained from Big Data in operational, tactical, or strategic areas largely depends on human understanding
The Effect of Adding Pieces of Cotton Textile Waste on Properties of Light and Fine-Grained Plain Concrete : Master's Thesis
No full textProizvodnja pamučnog donjeg rublja stvara određenu količinu otpada od pletenih tkanina. U ovom radu je ispitana mogućnost upotrebe otpada od pletenih pamučnih tkanina u betonu. U tu svrhu je napravljeno pet mješavina koje su imale dodatak tekstilnog otpada u količini od 1.7 i 3.5% ukupnog volumena te referentna mješavina bez dodatka tkanine. Na uzorcima se u svježem stanju mjeri obradivost a u očvrstlom stanju čvrstoća na savijanje i tlak, dinamički modul elastičnosti, gustoća, kapilarno upijanje i apsorpcija. Prikazana je usporedba dobivenih rezultata s rezultatima koji su ranije izrađeni i ispitivani na Katedri za građevinske materijale.Cotton underwear manufacture produces a significant amount of knitted fabric waste. The aim of this study is to examine the possibility of using cotton knit fabric waste in concrete. Therefore, there have been made five different mixtures that have had from 1,7% to 3,5% of the total textile waste volume and a reference mixture without adding any fabric. Workability has been measured during the samples' plastic state, while flexural strength and compression, dynamic modulus of elasticity, density and capillary absorption during their hardened state. In this study it is presented the comparison of the results obtained with those previously examined and obtained in the Department of Materials
Association of lifestyle habits and knowledge with the prevention of microvascular and macrovascualr complications in patients with diabetes mellitus: Cross-sectional study
No full textUVOD: Šećerna bolest (diabetes mellitus) kronična je bolest koja može dovesti do ozbiljnih mikrovaskularnih i makrovaskularnih komplikacija. Ključnu ulogu u prevenciji ovih komplikacija imaju zdrave životne navike, uključujući pravilnu prehranu, tjelesnu aktivnost i higijenu, kao i adekvatna edukacija pacijenata. Medicinsko osoblje, posebice liječnici i medicinske sestre, ima važnu ulogu u pružanju točnih i pouzdanih informacija pacijentima kako bi ih motivirali na pravilnu brigu o vlastitom zdravlju. Kvalitetna edukacija pacijenata može značajno smanjiti rizik od komplikacija i poboljšati njihovu kvalitetu života.
CILJ: Glavni cilj ove studije je utvrditi povezanost između životnih navika i znanja o šećernoj bolesti s učestalosti pojave mikravosakularnih i makrovaskularnih komplikacija kod oboljelih od šećerne bolesti.
ISPITANICI I METODE: Ova presječna studija provedena je u KBC-u Split kako bi se ispitala povezanost životnih navika i znanja pacijenata sa šećernom bolešću u prevenciji vaskularnih komplikacija. Podaci su prikupljeni anonimnim anketama tijekom hospitalizacije ili pregleda, koristeći upitnike o demografiji, tjelesnoj aktivnosti, prehrani, znanju o bolesti i kvaliteti života. Studiju je odobrilo Etičko povjerenstvo KBC-a Split, a sudjelovanje ispitanika bilo je dobrovoljno i anonimno.
REZULTATI: U istraživanju je sudjelovalo 216 ispitanika, pri čemu su osobe s komplikacijama bile statistički značajno starije (p = 0,004), u mirovini (p = 0,011), živjele na otoku (p = 0,034) i imale drugu kroničnu bolest (p = 0,003). Nisu utvrđene statistički značajne razlike u pridržavanju mediteranske prehrane (p = 0,289). Nije uočena povezanost između komplikacija i pušenja (p = 0,180), konzumacije alkohola (p = 0,414) ili tjelesne aktivnosti (p = 0,213), ali je granična značajnost uočena za vrijeme provedeno sjedeći (5,0 ± 2,7 vs. 4,3 ± 2,7 sati dnevno, p = 0,051). Ispitanici bez komplikacija imali su bolje znanje o prehrani (prosječan broj točnih odgovora 4,3 ± 1,5 vs. 3,9 ± 1,6, p = 0,049), dok su ispitanici s komplikacijama bolje prepoznali oštećenja koja nisu povezana sa šećernom bolesti (94,9% vs. 85,7%, p = 0,041).
ZAKLJUČAK: Rezultati provedene studije ističu značaj kontinuirane edukacije pacijenata sa šećernom bolesti, s naglaskom na prehranu, tjelesnu aktivnost i identifikaciju rizičnih čimbenika za moguće komplikacije. Edukacijama bi se osiguralo dugotrajno održavanje i poboljšanje znanja, što bi pomoglo u smanjenju rizika od komplikacija i unapređenju kvalitete života oboljelih.INTRODUCTION: Diabetes mellitus is a chronic disease that can lead to serious microvascular and macrovascular complications. Healthy lifestyle habits, including proper nutrition, physical activity, and hygiene, as well as adequate patient education, play a key role in preventing these complications. Healthcare professionals, particularly doctors and nurses, have an important role in providing accurate and reliable information to patients to motivate them to take proper care of their health. Quality patient education can significantly reduce the risk of complications and improve their quality of life.
AIM: The main objective of this study is to determine the association between lifestyle habits and knowledge about diabetes with the frequency of microvascular and macrovascular complications in individuals with diabetes.
PARTICIPANTS AND METHODS: This cross-sectional study was conducted at the University Hospital Centre Split to examine the relationship between patients' lifestyle habits and knowledge about diabetes in the prevention of vascular complications. Data were collected through anonymous surveys during hospitalization or medical examinations, using questionnaires on demographics, physical activity, diet, knowledge about the disease, and quality of life. The study was approved by the Ethics Committee of the University Hospital Centre Split, and participants took part voluntarily and anonymously.
RESULTS: The study included 216 participants, with individuals experiencing complications being significantly older (p = 0.004), more often retired (p = 0.011), living on an island (p = 0.034), and having another chronic disease (p = 0.003). No significant differences were found in adherence to the Mediterranean diet (p = 0.289). There was no observed association between complications and smoking (p = 0.180), alcohol consumption (p = 0.414), or physical activity (p = 0.213), but a borderline significance was noted for time spent sitting (5.0 ± 2.7 vs. 4.3 ± 2.7 hours per day, p = 0.051). Participants without complications had better knowledge about nutrition (average number of correct answers 4.3 ± 1.5 vs. 3.9 ± 1.6, p = 0.049), whereas participants with complications were more likely to recognize conditions unrelated to diabetes (94.9% vs. 85.7%, p = 0.041).
CONCLUSION: The study's results highlight the importance of continuing education for patients with diabetes, emphasising nutrition and physical activity, and identifying risk factors for possible complications. Education would ensure long-term maintenance and improvement of knowledge, which would help reduce the risk of complications and improve patient's quality of life