Repository of the University of Rijeka, Faculty of Maritime Studies
Not a member yet
3513 research outputs found
Sort by
The ecological impact of marinas on the marine environment
No full textTurizam je gospodarska grana koja je izuzetno osjetljiva na degradaciju okoliša jer su prirodne ljepote i bogata kulturna baština glavni faktori privlačnosti turista u Hrvatsku. Dio turističke ponude su i luke nautičkog turizma koje označavaju sve poslove vezane za prihvat i pružanje usluga nautičarima i njihovim plovilima. Razvoj i širenje turizma, ali i marina stvara pritiske na morski okoliš, dovodi do onečišćenja i iscrpljivanja prirodnih resursa. Kako bi se negativne posljedice na okoliš smanjile donose se brojne mjere i strategije koje bi uz primjenu koncepta održivog razvoja trebale smanjiti problem onečišćenja okoliša. Dugoročno promatrano najveća prijetnja turizmu je daljnji nekontrolirani razvoj koji obezvrjeđuje prirodnu osnovu i zbog toga se prilikom provođenja svake aktivnosti treba razmisliti kakve posljedice ona ostavlja na okolišu.Tourism is an economic branch that is extremely sensitive to environmental degradation, natural beauty and rich cultural heritage are the main factors that attract tourists to Croatia. Ports of nautical tourism are also part of the tourist offer, which indicate all jobs related to the reception and provision of services to sailors and their vessels. The development and expansion of tourism, as well as the marina, creates pressure on the marine environment, leads to pollution and depletion of natural resources. In order to reduce the negative consequences on the environment, numerous measures and strategies are adopted which, along with the application of the concept of sustainable development, should reduce the problem of environmental pollution. From a long-term perspective, the biggest threat to tourism is further uncontrolled development that devalues the natural base, and for this reason, when carrying out any activity, it is necessary to think about what consequences it leaves on the environment
Selective catalytic reactor on two-stroke engines driven by natural gas
No full textEmisije štetnih plinova s brodova odnosno iz dvotaktnih motora koji se pokreću prirodnim plinom znatno doprinose koncentracijama štetnih supstanci koji zagađuju zrak. No postoje tehnička sredstva i metode pomoću kojih se emisija ovih kemijskih spojeva u značajnoj mjeri može smanjiti u cilju očuvanja zdravlja kao i životne sredine i kao bi se brodski prijevoz razvijao kao održiviji oblik prijevoza.
Pod pojmom štetnih emisija s brodova uglavnom podrazumijevamo sumporne i dušikove okside nesagorene čestice kao i staklenički plinovi. Međutim količina emisija ovisi o tipu goriva pa teško gorivo emitira više zagađajućih materija od lakših derivata nafte. Zbog porasta sve strožijih regulacija koje se tiču tih emisija proizvođači brodskih motora pribjegavaju primjeni novih metoda kao što su primarne ili sekundarne metode poput SCR sustava. Pa ipak cijena je odlučujući faktor u odlučivanju koje će se gorivo i sustav primijeniti u cilju usuglašavanja sa regulacijama emisija.
U ovom završnom radu biti će govora o ispušnim brodskim plinovima, o njihovoj kompoziciji i štetnim supstancama koje se tiču tih emisija kao i načini pomoću kojih se problem emisija može riješiti.Emissions of harmful gases from ships or from two-stroke engines powered by natural gas contribute significantly to the concentrations of harmful substances that pollute the air. However, there are technical means and methods by which the emission of these chemical compounds can be significantly reduced in order to preserve health as well as the environment and as ship transport would develop as a more sustainable form of transport.
By the term harmful emissions from ships, we mainly mean sulfur and nitrogen oxides, unburned particles, as well as greenhouse gases. However, the amount of emissions depends on the type of fuel, so heavy fuel emits more pollutants than lighter oil derivatives. Due to the increase in ever stricter regulations concerning these emissions, the manufacturers of bros engines are resorting to the application of new methods such as primary or secondary methods such as the SCR system. And yet the price is a decisive factor in deciding which fuel and system will be used in order to comply with emission regulations.
In this final paper, we will talk about ship exhaust gases, their composition and harmful substances related to these emissions, as well as the ways in which the problem of emissions can be solved
Implementation of GTFS for maritime public transport
No full textZavršni rad istražuje primjenu General Transit Feed Specification (GTFS) standarda za integraciju pomorskog javnog prijevoza s kopnenim uslugama na području sjevernog Jadrana. U uvodnom dijelu rada naglašava se važnost mobilnosti ljudi u današnjem društvu te se opisuje kako tehnologija, poput Google Maps, olakšava planiranje putovanja i pruža informacije o javnom prijevozu. Glavni dio rada detaljno analizira GTFS standard, pružajući opise i značenje svake komponente tog formata podataka, uključujući podatke o prijevozniku, stajalištima, linijama, vožnjama, redoslijedu vožnje i kalendaru. Također se objašnjava razlika između statičkog i dinamičkog GTFS-a. Dalje, rad opisuje metodologiju izrade GTFS-a za pomorski javni prijevoz. Objašnjava se kako se prikupljaju podaci, kako se kreira struktura baze i unose podaci te naglašava važnost provođenja validacije podataka kako bi GTFS bio točan i pouzdan. Nadalje, istražuje se integracija GTFS-a s prometnim modelom na primjeru mreže javnog pomorskog prijevoza na području sjevernog Jadrana. Kroz primjenu ovog modela, moguće je analizirati i predvidjeti učinke integriranih usluga na promet i putovanja. Cilj ovog rada je testirati funkcionalnost modela i dobiti rezultate koji će pomoći u boljem razumijevanju i planiranju javnog prijevoza na području sjevernog Jadrana. Implementacija GTFS-a u pomorski javni prijevoz omogućila bi putnicima da dobiju točne informacije o brodskim linijama, rutama, stajalištima i voznim redovima, čime bi se poboljšalo iskustvo putovanja i olakšalo planiranje putovanja korisnicima javnog prijevoza.This final thesis explores and applies the General Transit Feed Specification (GTFS) standard for integrating maritime public transportation with land services in the northern Adriatic region. The introductory part emphasizes the importance of mobility in today's society and describes how technology, such as Google Maps, facilitates trip planning and provides information about public transportation. The main part of the thesis thoroughly analyzes the GTFS standard, providing descriptions and meanings of each component of this data format, including carrier information, stops, routes, trips, trip sequences, and the calendar. The difference between static and dynamic GTFS is also explained. Furthermore, the thesis describes the methodology of creating GTFS for maritime public transportation. It explains how data is collected, how the database structure is created, and data is entered, emphasizing the importance of data validation to ensure the accuracy and reliability of GTFS. Moreover, the integration of GTFS with the traffic model is explored using the example of the public maritime transportation network in the northern Adriatic region. Through the application of this model, it is possible to analyze and predict the effects of integrated services on traffic and travel. The goal of this work is to test the functionality of the model and obtain results that will aid in better understanding and planning of public transportation in the northern Adriatic region. Implementing GTFS in maritime public transportation would allow passengers to access accurate information about ship lines, routes, stops, and schedules, thereby improving the travel experience and facilitating trip planning for public transportation users
Application of the 5S method in warehouse operations
No full textOvaj rad detaljno analizira načela i utjecaj 5S metode na organizaciju rada skladišta, pristup, robi, smanjenje gubitaka i poboljšanje sigurnosti na radnom mjestu. U radu su kroz izrađenu SWOT analizu prikazane prednosti, nedostatci, prijetnje i prilike primjene 5S metode u radu skladišta. Rezultati SWOT analize ukazuju na to da 5S metoda ima pozitivan utjecaj na organizaciju skladišta i radne procese. Nadalje, povećava zadovoljstvo radnika i smanjuje nepotrebne troškove, čineći je vrijednim alatom za optimizaciju skladišnih operacija i postizanje boljih poslovnih rezultata. Ovaj rad pruža dublje razumijevanje implementacije 5S metode u kontekstu skladišnih aktivnosti i potvrđuje njezinu korisnost u suvremenom skladišnom okruženju.This paper provides a detailed analysis od the principles and impact of the 5S method on warehouse operations, access, inventory, waste reduction, and workplace safety. Through a conducted SWOT analysis, the advantages, disadvantages, threats, and opportunities of implementing the 5S method in warehouse operations are presented. The results of the SWOT analysis indicate that the 5S method has a positive influence on warehouse organization and operation processes. Furthermore, it enhances employee satisfaction and reduces unnecessary costs, making it a valuable tool for
optimizing warehouse operations and achieving improved business outcomes. This paper offers a deeper understanding of the implementation of the 5S method within the context of warehouse activities and confirms its utility in the contemporary warehouse environments
Ecological logistics
No full textFokus ovog završnog rada bit će utjecaji i načini sprječavanja logističkih procesa na
kvalitetu društva, života i okoliša. Tradicionalna logistika štetno utječe na društvo i okoliš, ali
zato postoje podsustavi poput zelene i povratne logistike kojima se teži smanjiti iste koliko je
god moguće, a sve radi kvalitetnog života sadašnjih i budućih generacija. Ekološka logistika
teži obuhvatiti ekološke i ekonomske aspekte i pronaći valjani balans kako bi postojao profit, a
sve u cilju maksimalne ekološke osviještenosti.The focus of this final paper will be the impact and ways of preventing logistics
processes on the quality of society, life and the environment. Traditional logistics have a
harmful effect on society and the environment, but that's why there are subsystems such as
green and reverse logistics, which aim to reduce them as much as possible, all for the sake of
quality life for current and future generations. Ecological logistics aims to encompass
ecological and economic aspects and find a valid balance in order to make a profit, all with the
aim of maximum ecological awareness
Autonomous vehicles in logistics
No full textRazvoj vozila u svrhu ispunjenja ljudskih potreba za prijevozom započinje izumom kotača, a dobiva glavni veliki uzlet u prvoj industrijskoj revoluciji izumom motornog, parnog pogona. Postepeni daljnji razvoj rezultira velikim brojem visoko naprednih vozila, koja sadrže inteligentne informatičke sustave koji se oslanjaju na umjetnu inteligenciju. Tako nastaje i ideja autonomnih vozila koja mogu samostalno voziti bez vozača, oslanjajući se na vlastite sustave navođenja. Istodobno se razvija inteligentni transportni sustav u kojem je jedna od bitnih sastavnica upravo komunikacija s navedenim inteligentnim vozilima. Time se povećavaju sigurnost i brzina odvijanja prometa, kao i njegova funkcionalnost u cjelini, što predstavlja odgovor na povećane potrebe moderne logistike za prijevozom robe i putnika. Kroz devet poglavlja obraditi će se nastanak i razvoj autonomnih vozila od same ideje, pa do stupnja razvijenosti u kojem se danas nalaze.The development of vehicles for the purpose of fulfilling human needs for transportation begins with the invention of the wheel, and gets its main big takeoff in the first industrial revolution with the invention of the motor, steam drive. Gradual further development results in many highly advanced vehicles, which contain intelligent IT systems that rely on artificial intelligence. This is how the idea of autonomous vehicles that can drive independently without a driver, relying on their own guidance systems, is born. At the same time, an intelligent transport system is being developed in which one of the essential components is communication with the mentioned intelligent vehicles. This increases the safety and speed of traffic, as well as its functionality, which is a response to the increased needs of modern logistics for the transport of goods and passengers. Through nine chapters, the origin and development of autonomous vehicles will be covered from the idea, up to the level of development in which they are today
Review and assessment of methods for monitoring and collecting of floating litter from the sea
No full textNadzor i prikupljanje otpada s morske površine ključni su aspekti očuvanja morskih ekosustava i zaštite morskog okoliša od onečišćenja. Postoji niz metoda koje se koriste za rješavanje ovog problema te su u ovom radu detaljno opisane i analizirane primjenom SWOT analize. SWOT analiza metoda nadzora i prikupljanja otpada sa morske površine istaknula je niz ključnih aspekata koji su od važnosti za očuvanje morskog okoliša. Snage ovih metoda, uključujući preciznost identifikacije većih otpadaka putem naprednih tehnologija te mogućnost praćenja potencijalnih nakupina otpada, pružaju temelj za brzu i ciljanu intervenciju. S druge strane, slabosti poput nedostatka preciznosti kod manjih otpadaka i ovisnosti o povoljnim vremenskim uvjetima ukazuju na potrebu za daljnjim tehničkim i tehnološkim unapređenjima. Prilike poput razvoja autonomnih čistača i primjene umjetne inteligencije za dubinsku analizu podataka otvaraju nove perspektive u borbi protiv onečišćenja. U radu je opisano nekoliko inovativnih metoda i uređaja koji se koriste za uklanjanje otpada s površine mora u lukama i marinama. Između navedenih metoda, nadzor plutajućeg otpada iz zraka ističe se kao posebno učinkovit, budući da omogućuje otkrivanje većih objekata i pregled šireg područja. Upotreba bespilotnih letjelica (dronova), zračnih patrola, satelita visoke rezolucije i tehnike automatiziranog prepoznavanja objekata pruža različite mogućnosti za precizno identificiranje i praćenje otpada na morskoj površini. Budući tehnološki napredak otvara prilike za unapređenje tih metoda.Monitoring and collecting marine litter from the sea surface are key aspects of preserving marine ecosystems and protecting the marine environment from pollution. There are a number of methods that are used to solve this problem, and in this paper they are described in detail and analyzed using a SWOT analysis. The SWOT analysis of methods of monitoring and collecting marine litter from the sea surface highlighted a number of key aspects that are important for the preservation of the marine environment. The strengths of these methods, including the precision of identification of larger debris through advanced technologies and the ability to monitor potential debris accumulations, provide the basis for rapid and targeted intervention. On the other hand, weaknesses such as the lack of precision with smaller scraps and the dependence on favorable weather conditions point to the need for further technical and technological improvements. Opportunities such as the development of autonomous cleaners and the application of artificial intelligence for in-depth data analysis open up new perspectives in the fight against pollution. The paper describes several innovative methods and devices used to remove marine litter from the sea surface in ports and marinas. Among the mentioned methods, the monitoring of floating marine litter from the air stands out as particularly effective, since it enables the detection of larger objects and the inspection of a wider area. The use of unmanned aerial vehicles (drones), aerial patrols, high-resolution satellites and automated object recognition techniques provide various opportunities for precise identification and monitoring of debris on the sea surface. Future technological progress opens up opportunities for improvement of these methods
Harmful impact of ballast water on the marine environment
No full textBalastne vode predstavljaju važan aspekt u pomorskom sektoru, omogućujući stabilnost i sigurnost brodova tijekom putovanja. Međutim, njihovo otpuštanje u lučkim područjima može uzrokovati unošenje invazivnih vrsta koje ugrožavaju morski ekosustav. Ovaj rad istražuje različite aspekte povezane s balastnim vodama, uključujući njihovu povijest, funkcije, utjecaj na okoliš te tehnološke metode tretiranja. Pravna regulativa, posebno Međunarodna konvencija o nadzoru i upravljanju brodskim balastnim vodama, igra središnju ulogu u usklađivanju pomorskog sektora s ciljevima zaštite okoliša. Tehnološki razvoj brodova bez balastnih tankova predstavlja inovativan smjer u smanjenju ekoloških rizika. Kroz sveobuhvatan pristup, ovaj rad analizira važnost i izazove upravljanja balastnim vodama, te naglašava potrebu za odgovornim i održivim pristupom kako bi se sačuvao morski okoliš.Ballast water is an important aspect of maritime transport because it provides stability and safety for ships during voyages. However, the discharge of ballast water into port areas can lead to the introduction of invasive species that threaten marine ecosystems. This paper examines various aspects of ballast water, including its history, functions, environmental impacts, and technical treatment methods. Legal regulations, particularly the International Convention for the Control and Management of Ships' Ballast Water and Sediments, play a central role in aligning the maritime sector with environmental protection goals. Technological advances in ballast-free ship designs represent an innovative way to reduce ecological risks. Through a comprehensive approach, this paper analyzes the importance and challenges of ballast water management and highlights the need for responsible and sustainable practices to protect the marine environment
The North Adadriatic traffic direction as a hub of global transport flows
No full textLučki sustavi i luke imaju ključnu ulogu u povezivanju različitih prometnica i omogućuju globalnu trgovinu. U današnjem svijetu, uspješno poslovanje na području transporta zahtijeva visoku razinu učinkovitosti u izgradnji infrastrukture i organizaciji logističkih procesa. Razvoj lučkih sustava zahtijeva kontinuirano ulaganje truda i resursa kako bi se prilagodili brzim promjenama i implementirale nove tehnologije s ciljem održavanja konkurentske pozicije na globalnom tržištu. Integracija luka s prometnom infrastrukturom i ključnim prometnim koridorima ključna je za stvaranje visokokvalitetnog i efikasnog lučkog sustava.
Luke su ishodišna i odredišna mjesta za obavljanje djelatnosti na moru i njihova namjena je transport tereta, iskrcaj ili ukrcaj putnika, obnova zaliha za brod i sl. Trgovačke luke se međusobno razlikuju iako obavljaju iste djelatnosti. Kako bi se pojedine luke mogle istaknuti i biti konkurentne na svjetskom tržištu potrebno je slijediti trendove, unaprjeđivati i obnavljati infrastrukturu, pronaći kvalitetnu radnu snagu i omogućiti dobru radnu okolinu.
Ključna središta za kretanje robe i prometnih ruta su luke, koje danas igraju ključnu ulogu u povezivanju svih zemalja svijeta kroz trgovinske aktivnosti. Unutar morskih luka razvijaju se kontejnerski terminali, koji služe kao glavna čvorišta za transport većeg dijela svjetske robe.
Sjevernojadranski prometni pravac je najkraći i najekonomičniji put koji povezuje Europu s Sredozemljem, omogućujući i plovidbu prema Sueskom kanalu te većini zemalja u Aziji, Africi i Australiji. Ovaj prometni pravac stvara spoj između dva različita ekonomska svijeta: razvijenih zemalja u zapadnoj Europi s razvijenom industrijom i azijsko-afričkih zemalja u razvoju, posebno istaknutih zemalja s velikim gospodarskim potencijalom, kao što su Kina, Južna Koreja i Japan. U ovom radu će se opisati uloga luka Rijeka, Trst i Kopar kao čvorišta transportnih tokova na sjevernojadranskom prometnom pravcu.Port systems and ports play a key role in connecting different roads and enabling global trade. In today's world, successful business in the field of transport requires a high level of efficiency in building infrastructure and organizing logistics processes. The development of port systems requires continuous investment of effort and resources in order to adapt to rapid changes and implement new technologies with the aim of maintaining a competitive position in the global market. The integration of ports with transport infrastructure and key transport corridors is essential for creating a high-quality and efficient port system.
Ports are places of origin and destination for carrying out activities at sea and their purpose is to transport cargo, disembark or embark passengers, replenish supplies for the ship, etc. Commercial ports differ from each other even though they perform the same activities. In order for individual ports to stand out and be competitive on the world market, it is necessary to follow trends, improve and renew infrastructure, find quality workforce and provide a good working environment.
Key centers for the movement of goods and transport routes are ports, which today play a key role in connecting all countries of the world through trade activities. Within seaports, container terminals are being developed, which serve as the main hubs for the transportation of most of the world's goods.
The Northern Adriatic traffic route is the shortest and most economical route that connects Europe with the Mediterranean, enabling navigation to the Suez Canal and most countries in Asia, Africa and Australia. This transport route creates a connection between two different economic worlds: developed countries in Western Europe with developed industry and Asian-African developing countries, especially prominent countries with great economic potential, such as China, South Korea and Japan. This paper will describe the role of the ports of Rijeka, Trieste and Kopar as hubs of transport flows on the northern Adriatic traffic route
Terminal planning as a function of mobility an example of a micro model
No full textU radu je izrađen mikrosimulacijski model koji prikazuje mogućnosti korištenja
mikrosimulacija za analizu urbane mobilnosti. Model prikazuje hipotetsko urbano središte s 2
terminala, autobusnim i željezničkim, te različitim opcijama za ostvarivanje mobilnosti. Urbana
mobilnost ostvaruje se odabirom različitih načina prijevoza i prijevoznih sustava pri čemu se
izdvajaju: privatni prijevoz (automobili), javni prijevoz (cestovni i željeznički) te oblici dijeljene
mobilnosti (ride-sharing, car-sharing, prijevoz na zahtjev i na temelju potražnje, itd.). Za izradu
modela korišten je alat PTV Vissim. Upotrebljene su dvije vrste metoda odabira rute, statička i
dinamička. Statička se koristila kod javnog prijevoza za definiranje linija i smjerova putovanja, a
dinamička kod privatnog prijevoza za odabir odredišnih zona putovanja na temelju funkcije
korisnosti gdje su prikazane mogućnosti utjecaja pojedinih veličina na odabir destinacije.
Realizacija se ostvaruje prikazom 5 različitih modova: osobni automobil, autobus, vlak, shuttle
prijevoz, mini bus. Kroz odabrane rezultate simulacije prikazane su mogućnosti
mikrosimulacijskog modela za potrebe detaljnije analize u zoni oba terminala, namjenskih
površina i prostora gdje se putnici kreću, čekaju ili pripremaju na transfer, ukrcaj ili iskrcaj s
prijevoznog sredstva.A model has been developed to represent the use of mobility with 2 terminals, bus and train. Mobility, as the movement of people, is achieved through various modes of transportation, and the use of different transportation systems: private, public, and shared mobility. The model employs two types of route selection methods, static and dynamic. Implementation is realized by depicting 5 different modes: personal car, bus, train, shuttle transport, and mini-bus. By using various methods and forms of transportation, the traffic model enables system analysis