Seismic Analysis of the Masonry Tower Ficarolo in Italy Using the Finite-discrete Elements Method : Master's Thesis

U 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

Statistical analysis of total water hardness data of the Jadro river : diploma thesis

U diplomskom radu izvršena je statistička analiza podataka o ukupnoj tvrdoći vode koristeći različite statističke metode. Cilj ovog diplomskog rada je primjenom različitih statističkih metoda analizirati podatke o ukupnoj tvrdoći vode na pojedinim lokacijama u gradu Splitu kao i na samom izvorištu rijeke Jadro. Na temelju prikupljenih podataka o ukupnoj tvrdoći vode na različitim lokacijama u području Splita te na izvoru rijeke Jadro, podaci su obrađeni pomoću deskriptivne statistike kako bi se dobio uvid u osnovne karakteristike uzoraka, poput srednje vrijednosti, standardne devijacije, raspona i drugih relevantnih statističkih parametara. Daljnja analiza uključivala je primjenu inferencijalne statistike s ciljem testiranja hipoteza i donošenja zaključaka o populaciji iz koje su uzorci uzeti. Korištene metode uključivale su T - test i F - test radi utvrđivanja značajnosti razlika i povezanosti među različitim skupinama podataka. Ovim istraživanjem istaknuta je važnost statističke obrade podataka u razumijevanju i interpretaciji ne samo mjerenja tvrdoće vode, već i brojnih drugih okolnosti iz svakodnevnog života.In this thesis, a statistical analysis of data on total water hardness was conducted using various statistical methods. The aim of this thesis is to analyze data on total water hardness at specific locations in the city of Split as well as at the Jadro River source using different statistical methods. Based on the collected data on total water hardness at different locations in the Split area and at the Jadro River source, the data were processed using descriptive statistics to gain insight into the basic characteristics of the samples, such as mean, standard deviation, range, and other relevant statistical parameters. Further analysis included the application of inferential statistics to test hypotheses and draw conclusions about the population from which the samples were taken. The methods used included the T - test and F - test to determine the significance of differences and relationships between different data groups. This research highlighted the importance of statistical data processing in understanding and interpreting not only measurements of water hardness but also numerous other circumstances from everyday life

Razvoj predloška za dizajn bočnog okvira karoserije automobila u ranoj fazi koncepta unutar CAD sustava CATIA V5

In this thesis main terms, vehicle frame components and development of template for automated design of automobile adapter model are described. Template is written in C# programming language with use of Visual Studio and used in Catia V5 design software. Program searches through all inputs provided inside Catia V5 document and in reference to them creates surfaces for positioning of vehicle components. Surfaces are placed in certain geometrical sets that have their own standardised structure inside structure tree. All components are connected parametrically and correspond with inputs. Testing was done on few different models and shorten design process time was achieved with reduced possibility of mistake due to size of data handled. Thesis resulted with automated design template for vehicle adapter model and showed possibilities of further development of this approach and implementation in different areas.U ovom radu glavni pojmovi, dijelovi bočnog okvira karoserije automobila i razvoj predloška za automatizirani dizajn adapter modela automobila su opisani. Predložak je pisan u C# programskom jeziku korištenjem Visual Studio programa i softvera za dizajn Catia V5. Program pretražuje sve ulazne podatke dane u Catia V5 dokumentu i stvara površine za pozicioniranje dijelova vozila s ulaznim podacima kao referencom. Površine su smještene u posebne geometrijske skupove koji imaju svoju standardiziranu strukturu unutar stabla značajki. Svi dijelovi su parametarski povezani međusobno i sa ulaznim podacima. Testiranje je izvršeno na više modela i postignuta su skraćena vremena dizajniranja su postignuta sa smanjenom mogućnošću pogreške s obzirom na količinu korištenih podataka. Rad je rezultirao predloškom za automatizirani dizajn adapter modela automobila i pokazao mogućnosti budućeg razvoja ovog pristupa i primjenu u drugim područjima

Spectroscopic determination of glucosinolates in plants Sinapis alba and Lepidium draba : diploma thesis

U ovom radu UHPLC-DAD-MS/MS analizom odreĎen je glukozinolatni profil različitih biljnih dijelova biljke Lepidium draba i nepoznatog biljnog uzorka te glukozinolatni profil sjemenki biljke Sinapis alba. Glukozinolati su iz uzoraka izolirani u desulfatiranome obliku modificiranom metodom ISO 9167-1. Dobiveni glukozinolatni profil biljke Lepidium draba usporeĎen je s glukozinolatnim profilom nepoznate biljne vrste kako bi se odredile kemotaksonomske značajke nepoznatog biljnog uzorka. U oba uzorka, najveći udio glukozinolata je pronaĎen u listu, a najmanji u stabljici. Pri tome, najzastupljeniji spoj u listu oba uzorka je glukorafanin (41,49 ± 4,05 μmol/g suhog biljnog materijala biljke Lepidium draba te 40,40 ± 3,62 μmol/g suhog biljnog materijala nepoznatog uzorka), a u cvatu pak glukosinalbin (32,03 ± 5,43 μmol/g u biljci Lepidium draba te 34,73 ± 0,76 μmol/g u nepoznatom uzorku). Najzastupljeniji glukozinolati u oba uzorka potječu od metionina. Na temelju znatne sličnosti glukozinolatnih profila uzoraka te UV i MS2 spektara, zaključeno je da nepoznatni uzorak vjerojatno pripada vrsti Lepidium draba. Obzirom da je glukozinolatni profil sjemenki biljke Sinapis alba bio uvelike jednostavniji od gore navedenih uzoraka, taj uzorak je posluţio za potvrdu strukture najzastupljenijeg spoja sjemenki - desulfoglukosinalbina. Struktura je potvrĎena NMR tehnikom te je utvrĎena β konfiguracija anomernog ugljikovog atoma glukozne jedinice glukosinalbina.In this paper, UHPLC-DAD-MS/MS analysis was used for determination of the glucosinolate profile of various plant parts of Lepidium draba and an unknown plant sample, as well as the glucosinolate profile of Sinapis alba seeds. Glucosinolates were isolated from the samples in their desulfated form using a modified ISO 9167-1 method. The obtained glucosinolate profile of Lepidium draba was compared with the glucosinolate profile of the unknown plant species in order to determine chemotaxonomic characteristics of the unknown plant sample. In both samples, the highest glucosinolate content was found in the leaves, while the lowest content was found in the stem. The most abundant compound in the leaves of both samples was glucoraphanin (41.49 ± 4.05 μmol/g dry plant material of Lepidium draba and 40.40 ± 3.62 μmol/g dry plant material of the unknown sample) and glucosinalbin in the inflorescence (32.03 ± 5.43 μmol/g in Lepidium draba and 34.73 ± 0.76 μmol/g in the unknown sample). The most abundant glucosinolates in both samples are derived from methionine. Based on the significant similarity in the glucosinolate profiles and UV and MS2 spectra of the samples, it was concluded that the unknown sample likely belongs to the Lepidium draba species. Since the glucosinolate profile of Sinapis alba seeds was much simpler than that of the above-mentioned samples, this sample was used for confirmation of the structure of the most abundant compound in the seeds - desulfoglucosinalbin. The structure was confirmed using NMR techniques, and the β configuration of the anomeric carbon atom of the glucose unit of glucosinalbin was determined

Retrospective analysis of the causes and course of rehabilitation of patients with total hip arthroplasty at the Department of Physical Medicine and Rehabilitation with Rheumatology at the Clinical Hospital Center Split

Ovaj završni rad bavi se retrospektivnom analizom uzroka i tijeka rehabilitacije pacijenata s ugrađenom totalnom endoprotezom (TEP) kuka na Zavodu za fizikalnu medicinu i rehabilitaciju s reumatologijom u Kliničkom bolničkom centru Split tijekom 2023. godine. Istraživanje je obuhvatilo 109 pacijenata, od kojih je 54 imalo ugrađenu totalnu endoprotezu kuka. Glavni uzroci za ugradnju TEP-a kuka su degenerativne bolesti, posebno koksartroza, dok su traumatske ozljede rjeđe, ali zahtijevaju složeniji rehabilitacijski postupak. Analiza je pokazala da su žene češće podvrgnute ovoj operaciji, što može biti povezano s različitim životnim navikama i drugim bolestima. Rehabilitacija se pokazala ključnom za uspješan oporavak pacijenata, pri čemu su pacijenti s traumatskim ozljedama imali dulji boravak u bolnici. Prosječne vrijednosti Barthelovog indeksa i opsega pokreta značajno su se poboljšale nakon rehabilitacije, što potvrđuje uspjeh rehabilitacijskih postupaka.This thesis presents a retrospective analysis of the causes and rehabilitation process of patients with total hip arthroplasty (THA) at the Department of Physical Medicine and Rehabilitation with Rheumatology at the Clinical Hospital Center Split during 2023. The study included 109 patients, of whom 54 underwent total hip arthroplasty. The main causes for THA were degenerative diseases, particularly coxarthrosis, while traumatic injuries were less common but required more complex rehabilitation. The analysis showed that women were more frequently subjected to this surgery, which can be related to different lifestyle habits and other diseases. Rehabilitation was found to be crucial for the successful recovery of patients, with those suffering from traumatic injuries having a longer hospital stay. The average values of the Barthel Index and range of motion significantly improved after rehabilitation, confirming the effectiveness of the rehabilitation procedures

Pervious Concrete Reinforced with Recycled Textile Fibers : Master's Thesis

Glavna uloga propusnih betona je propuštanje vode s betonske površine u donje slojeve, sprečavanje površinskog otjecanja i efikasnije dimenzioniranje sustava odvodnje oborina. Glavni cilj ovog istraživanja je pronaći mješavinu propusnog betona koja ima zadovoljavajuću propusnost ali i čvrstoću, te ispitati utjecaj dodavanja recikliranih pamučnih vlakana na svojstva betona. Napravljeno je osam različitih mješavina koje su se međusobno razlikovale po sadržaja pojedine frakcije agregata, te prisutnosti tekstilnih vlakana. Sve mješavine su se ugrađivale na jednak način. Svojstva mješavina su ispitana u svježem stanju metodom oblikovanja kuglice i metodom slijeganja. Svojstva mješavina u očvrslom stanju ispitana su na tlačnu čvrstoću, savojnu čvrstoću, poroznost i propusnost.The main role of pervious concrete is the leakage of water from the concrete surface into the lower layers, prevention of surface run-off and more efficient sizing of the precipitation drainage system. The main goal of this research is to find a mixture of pervious concrete that has satisfactory permeability but also strength, and to examine the impact of adding recycled cotton fibers on the properties of concrete. Eight different mixtures were made, which differed in the content of each aggregate fraction and the presence of textile fibers. All mixtures were compacted in the same way. The properties of the mixtures were tested in the fresh state by the stable ball forming method and the slump test. The properties of mixtures in the hardened state were tested for compressive strength, flexural strength, porosity and permeability

LEAD REMOVAL FROM WASTEWATER USING BY-PRODUCTS/WASTE FROM THE FOOD INDUSTRY : diploma thesis

Sve veći porast gradskog stanovništva, razvoj industrije i energetike, povećanje komunalnog otpada i razvoj masovnog turizma dovode do emisije štetnih metala u okoliš. Navedeni antropogeni izvori znatno onečišćuju vode u prirodi teškim metalima, stoga je neophodno razviti metode uklanjanja teških metala iz vode na siguran i ekološki prihvatljiv način. U ovom radu ispitana je učinkovitost uklanjanja teškog metala olova iz otpadne vode sorpcijom na nusproizvodima/otpadu iz prehrambene industrije (košticama maslina, peletu od komine maslina, ostacima hridinskog ježinca, košticama trešanja i košticama višanja). Sorpcija olova provedena je šaržnim postupkom iz otpadne vode koncentracije 0,5 mmol Pb/L i 1,5 mmol Pb/L. Svi ispitani biosorbensi pokazali su potencijal uklanjanja olova iz obiju otpadnih voda. Bolje uklanjanje olova postignuto je pri nižoj početnoj koncentraciji. Najveću učinkovitost pokazale su koštice višanja i to 83,65 % pri nižoj početnoj koncentraciji olova te 54,90 % pri višoj početnoj koncentraciji. Iako je postignuto prilično dobro uklanjanje olova iz otpadne vode, zaostala koncentracija olova bila je iznad zakonom propisanih vrijednosti za ispust efluenta u površinske vode i u sustav javne odvodnje. Stoga bi buduća istraživanja trebalo usmjeriti na modifikaciju ispitanih biosorbenasa radi povećanja njihove učinkovitosti u obradi voda onečišćenih olovom.Increase in the city's population, the development of industry and energetics, the increase in municipal waste and the development of mass tourism lead to the emission of harmful metals into the environment. The mentioned anthropogenic sources significantly pollute water in nature with heavy metals, thus it is necessary to develop methods of removing heavy metals from water in a safe and environmentally friendly manner. In this diploma thesis the effectiveness of lead removal from wastewater by sorption using by-products/waste from the food industry (olive pits, olive pomace pellets, residues of the sea urchin, cherry pits and sour cherry pits) was examined. Sorption of lead was carried out by a batch performance from wastewater containing 0.5 mmol Pb/L and 1.5 mmol Pb/L. All tested biosorbents showed the potential for lead removal from both wastewaters. Better removal was achieved at lower initial lead concentration. The highest efficiency of 83.65 % was obtained by sour cherry pits for lower initial lead concentration and 54.90 % for higher initial lead concentration. Although a good lead removal was achieved, the residual lead concentration was still above the prescribed value for discharge into the public sewage system and into the surface waters. Therefore, future research should be focused on the modification of the tested biosorbents in order to increase their efficiency in treatment of lead polluted water

Corrosion inhibition of titanium by propolis in simulated oral cavity conditions : diploma thesis

Titanij (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

Organizational culture and management of organizational changes in the company Jur Prom d.o.o.

U poduzeću Jur Prom d.o.o., organizacijska kultura ima ključnu ulogu u uspjehu upravljanja organizacijskim promjenama. Istraživanje je pokazalo da pozitivna organizacijska kultura značajno olakšava provedbu promjena i smanjuje otpor zaposlenika. Analiza korelacijskih podataka pokazuje statistički značajnu povezanost između organizacijske kulture i uspjeha u upravljanju promjenama. Više od polovice zaposlenika smatra da organizacijska kultura doprinosi uspjehu promjena i olakšava njihovu implementaciju. Pozitivna percepcija komunikacije i informiranosti zaposlenika dodatno potvrđuje da dobra organizacijska kultura može poboljšati proces promjena i smanjiti prepreke. Međutim, deskriptivni rezultati ukazuju na to da zaposlenici također osjećaju nesigurnost zbog nedostatka adekvatne komunikacije i informacija o razlozima i ciljevima promjena. Iako većina zaposlenika razumije nužnost promjena za uspjeh poduzeća, osjećaj nesigurnosti i stresa može utjecati na prihvaćanje i uspješnost tih promjena. Da bi se poboljšala učinkovitost upravljanja promjenama, preporučuje se da poduzeće uspostavi jasnije i učestalije komunikacijske kanale, osigura adekvatne informacije o razlozima i ciljevima promjena te aktivno uključi zaposlenike u procese odlučivanja i planiranja. Ove mjere mogu pomoći u smanjenju nesigurnosti i stresa povezanih s promjenama, te dodatno poboljšati njihovu učinkovitost i prihvaćenost među zaposlenicima. U konačnici, uspješno upravljanje organizacijskim promjenama u poduzeću Jur Prom d.o.o. ovisi o pozitivnoj organizacijskoj kulturi i kvaliteti komunikacije unutar organizacije.At Jur Prom d.o.o., organizational culture plays a crucial role in the success of managing organizational changes. The research has demonstrated that a positive organizational culture significantly facilitates the implementation of changes and reduces employee resistance. Correlational analysis reveals a statistically significant relationship between organizational culture and success in change management. More than half of the employees believe that organizational culture contributes to the success of changes and eases their implementation. The positive perception of communication and employee information further confirms that a strong organizational culture can enhance the change process and reduce barriers. However, descriptive results indicate that employees also experience insecurity due to inadequate communication and information regarding the reasons and goals of the changes. Although most employees understand the necessity of changes for the company’s success, feelings of insecurity and stress can impact the acceptance and effectiveness of these changes. To improve the effectiveness of change management, it is recommended that the company establish clearer and more frequent communication channels, provide adequate information about the reasons and goals of changes, and actively involve employees in decision-making and planning processes. These measures can help reduce insecurity and stress related to changes and further enhance their effectiveness and acceptance among employees. Ultimately, successful management of organizational changes at Jur Prom d.o.o. depends on a positive organizational culture and the quality of communication within the organization

Analysis of the Influence of the Interlayer on the Behaviour of Laminated Glass Beams Exposed to Bending : Master's Thesis

Ovaj diplomski rad analizira utjecaj izbora međusloja kod laminiranih staklenih nosača izloženih savijanju. U prvom dijelu rada opisani su različiti međuslojevi koji se koriste kod ovakvih nosača te navedene osnovne materijalne karakteristike potrebne za proračun. Proveden je analitički proračun laminiranih nosača izloženih savijanju prema prEN16612, te izvršena numerička analiza laminiranih nosača izloženih savijanju (fourpoint bending test) varirajući međuslojeve. Na kraju su dobiveni analitički i numerički rezultati uspoređeni s eksperimentalnim istraživanjima objavljenim u literaturi, te formulirani zaključci.This thesis analyses the influence of the interlayer choice in laminated glass beams exposed to bending. The first part of the paper describes the different interlayers used in such supports and lists the basic material characteristics required for the calculation. Analytical calculation of laminated beams exposed to bending according to prEN16612 was performed, and numerical analysis of laminated beams exposed to bending (fourpoint bending test) was performed, varying the interlayers. Finally, analytical and numerical results were obtained compared with experimental research published in the literature, and conclusions were formulated