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Requirements for the stability of passenger megaships for round trips
No full textIndustrija mega kruzera ne samo da se oporavlja od pandemije, već i nadmašuje rekordnu 2019.
godinu. Ovaj rast obilježen je izgradnjom većih, luksuznijih brodova te povećanjem broja
putnika. Prilagodljivost i otpornost industrije jasno su vidljivi u ovoj ekspanziji. Međutim, to
također zahtijeva dublje razumijevanje stabilnosti brodova, sigurnosti i utjecaja na okoliš. Ovaj
rad obrađuje te teme, istražujući zahtjeve za stabilnost putničkih brodova u neoštećenom i
oštećenom stanju, kao i napredne sustave stabilizacije koji su ugrađeni na ove brodove.The mega cruise ship industry is not just recovering from the pandemic, but also surpassing the
record year of 2019. This growth is marked by the construction of larger, more luxurious ships
and a surge in passenger numbers. The industry's adaptability and resilience are evident in this
expansion. However, it also necessitates a deeper understanding of ship stability, safety, and
environmental impact. This paper delves into these topics, exploring the stability requirements
for passenger ships in both intact and damaged conditions, and the advanced stabilization
systems installed on these ships
Knowledge of the forces of wind, waves and sea currents as a condition designing seaports
No full textU ovom radu su prikazani meteorološki (vjetar) i oceanografski elementi (morske struje i valovi) koji su sastavni dio pomorstva i esencijalni elementi za planiranje i projektiranje hidrotehničkih zahvata u morskoj luci ili na otvorenom moru. Morske luke daju sigurnosti i zaštićenost, međutim uvijek postoji utjecaj vanjskih sila prilikom uplovljavanja, isplovljavanja, manevra broda prilikom priveza i odveza te njegovog boravka u luci. Na osnovi dostupnih literatura, u radu je prikazan proračun prirodnih vanjskih sila odnosno sile vjetra, morskih struja i valova koje djeluju na brod M/V Dubrovnik koji je uglavnom privezan na Gatu sv. Petra u Gradskoj luci Split. Zaključeno je da sile vjetra imaju najveći utjecaj na sami brod u odnosu na sile morskih struja i valova. Sila morske struje nisu značajne osim u periodima orkanskog vjetra dok sila valova je najizraženija u vrijeme lebića premda njegova ekstremna pojava je na ovom području učestala svakih 10-15 godina.This paper presents meteorological (wind) and oceanographic elements (sea current and waves) which are an integral part of seafaring and essential elements for planning and designing hydrotehnical procedures in a seaport or on the open sea. Sea port provide security and protection, however, there are always the influence of external forces when arrival, departure, maneuvering the ship during bearthing and unberthing, and its stay in the port. Based on the available literature, the paper presents the calculation of natural external forces, the force of wind, sea currents and waves acting on the ship M/V Dubrovnik, which is mostly moored at St. Peter in the City Port of Split. It was concluded that wind forces have the greatest influence on the ship itself compared to the forces of sea current and waves. The force of the sea current is not significant except during periods of hurricane wind, while the force of the waves is most pronounced at the time of lebić, although its extreme occurance is frequent in this area every 10-15 years
Applied mathematics in maritime
No full textOvaj rad istražuje ključnu ulogu primijenjene matematike u pomorstvu i njen značaj za obrazovanje i osposobljavanje pomoraca. Primijenjena matematika nije samo alat za rješavanje konkretnih problema, već i sredstvo za njihovo otkrivanje i bolje razumijevanje uzoraka te predviđanje budućih trendova u pomorskoj industriji. Kroz povijesni pregled, rad naglašava dugogodišnju povezanost matematike i pomorstva, ističući njihov zajednički napredak. U fokusu rada su različite profesionalne domene u kojima se matematički modeli i analize koriste u svakodnevnim aktivnostima pomoraca, s naglaskom na operativne, obrazovne i poslovne aspekte. Rad također identificira specifična područja primjene matematike u pomorskim procesima i obrazovanju.This paper explores the key role of applied mathematics in the maritime industry and its significance for the education and training of seafarers. Applied mathematics is not only a tool for solving specific problems but also a means of discovering them, as well as better understanding patterns and predicting future trends in the maritime industry. Through a historical overview, the paper highlights the long-standing connection between mathematics and maritime navigation, emphasizing their mutual advancement. The focus is on various professional domains where mathematical models and analyses are used in the daily activities of seafarers, with an emphasis on operational, educational, and business aspects. The paper also identifies specific areas of mathematics applied in maritime processes and education
Sustainable development goals in the blue economy
No full textCilj ovoga rada je pružiti uvid u Ciljeve održivog razvoja (SDG) u Plavoj ekonomiji, s
fokusom na turizam. Koncept Plave ekonomije zalaže se za održivu upotrebu morskih resursa
kako bi se postigao gospodarski rast, poboljšala sredstva za život i radna mjesta uz očuvanje
zdravlja morskog ekosustava. Sedamnaest Ciljeva održivog razvoja Ujedinjenih naroda (UN
SDGs) predstavljaju smjernice za postizanje održive budućnosti, isprepliću se s Plavom
ekonomijom pružajući smjer za suočavanje s globalnim izazovima, promičući zaštitu obalnog
i morskog okoliša i ekonomski prosperitet. Međusobni uspjeh određen je zajedničkim
djelovanjem svih dionika, korištenjem inovativnih ideja i tehnologija, te strukturama
upravljanja koje balansiraju gospodarski rast s društvenom jednakošću i očuvanjem okoliša.
Prihvaćanje potencijala održive Plave ekonomije osnovica je za ostvarenje Ciljeva održivog
razvoja i osiguravanje održive budućnosti za obalne zajednice i cijeli planet. U radu je
provedeno primarno istraživanje SDG-a u kontekstu održivog turizma.The aim of the thesis was to provide insight into the Sustainable Development Goals (SDG)
in the Blue Economy. The Blue economy concept advocates for sustainable use of ocean
resources for economic growth, improved livelihoods and jobs while preserving the health of
the ocean ecosystem. The 17 Sustainable Development Goals, which represent guidelines for
achieving a more prosperous and sustainable future for all, are intertwined with the Blue
economy, providing direction for meeting global challenges by promoting coastal and marine
environmental protection and economic prosperity. Mutual success is achieved through the
joint action of all stakeholders, the use of innovative ideas and technologies and management
structures that balance economic growth with social equality and environmental protection.
Embracing the potential of the sustaianble Blue economy is the foundation for achieving
sustainable development goals and ensuring a sustainable future for coastal communities and
the entire planet in essence. In this thesis, research was carried out in the context of sustainable
tourism
Operational investigation in maritime
No full textRazvoj operacijskih istraživanja te njihova primjena u pomorstvu glavna je tema
ovog diplomskog rada. Povijest operacijskih istraživanja seže već u 18 st., ali službeni
početak se smatra 1939. godina objavom knjige Leonida Vitaljeviča Kantroviča na temu
operacijskih istraživanja. Metode operacijskih istraživanja koje su opisane u ovom radu su
vektori, linearno programiranje, simpleks metoda, problem transporta i distribucije, problem
trgovačkog putnika te optimalna asignacija. Operacijska istraživanja su složeno znanstveno
područje u kojima se primjenjuju matematički modeli i metode optimizacije u svrhu
nalaženja optimalnog rješenja nekog problema. Postupak operacijskih istraživanja mogao bi
se svesti na sljedeće korake: postavljanje granica sustava koji se istražuje (formulacija
problema), konstrukcija modela, modelsko računanje i primjena. Operacijska istraživanja se
primjenjuju u različitim područjima kao što su: proizvodnja, transport, graditeljstvo,
telekomunikacije, financijsko planiranje, zdravstvo, pomorstvo, vojska itd.This master's thesis will cover the development and application of operations
research in maritime operations. The history of operations research dates back to the 18th
century, but its official beginning is considered to be in 1939 with the publication of Leonid
Vitalyevich Kantorovich's book on the subject. The methods of operations research
described in this thesis include vectors, linear programming, simplex method, transportation
and distribution problem, traveling salesman problem, and optimal assignment. Operations
research is a complex scientific field that applies mathematical models and optimization
methods to find optimal solution through a scientific approach. The process of operations
research can be summarized into the following steps: setting the boundaries of the system
under investigation (problem formulation), model construction, computational modeling,
and application. Operations research is applied in various fields such as manufacturing,
transportation, construction, telecommunications, financial planning, healthcare, maritime
operations, military, etc
A PROACTIVE APROACH TO MAINTENANCE AND SPARE PARTS PLANNING FOR MARINE MECHANICAL SYSTEMS
No full textThe Maintenance Concept Adjustment and Design method primarily developed primarily for the maritime industry and for ships, with the aim of analysing and modelling technical systems from a maintenance point of view. The system was developed with the aim of analysing and optimizing maintenance and spare parts requirements and minimizing life cycle costs. In this study, several changes to the method are presented in order to make it more user-friendly. The first proposed change is the modification of the failure analysis method; instead of the Weibull process, the Power Law Process is introduced. The proposed change, which will simplify the failure analysis, was subjected to several suitability tests, the first being the Akaike Information Criterion test. The test showed that the Power Law Process model fits the analysed data better than the Weibull model. Next, the applicability was tested by comparing the results obtained with the Power Law Process analysis with previously published data using the Weibull method. After establishing the validity of the proposed changes, the functionality is tested on a new maintenance and spare parts optimization model, which is an extension of the model used in the Maintenance Concept Adjustment and Design method. In addition to simplifying the process, a further simplification is sought, namely the use of the brute force method to solve the optimization of maintenance and spare parts. The verification of the optimization results was carried out using Brent’s optimization method and the Limited memory Broyden–Fletcher–Goldfarb–Shanno method with Boundaries. Both methods confirmed the optimization results. Finally, the optimization results were verified using the Weibull model for failure data, which confirmed the validity of the proposal to modify the Maintenance Concept Adjustment and Design method in the failure data analysis and optimization method segment. Furthermore, this thesis deals with an additional modification of inventory policy in the maritime industry due to current laws and regulations, which has never been applied before. By introducing a safety critical spare parts minimum, a new safety barrier is created to prevent the consequences of a spare parts shortage. This new minimum is included in the optimization model and tested to see how this change affects maintenance and spare parts management. Initially, this will lead to additional costs for the company and increase the safety of the ship. Further analysis has shown that the cost of these spare parts is easily compensated by the avoidance of costs that may arise from the lack of spare parts.The Maintenance Concept Adjustment and Design method primarily developed primarily for the maritime industry and for ships, with the aim of analysing and modelling technical systems from a maintenance point of view. The system was developed with the aim of analysing and optimizing maintenance and spare parts requirements and minimizing life cycle costs. In this study, several changes to the method are presented in order to make it more user-friendly. The first proposed change is the modification of the failure analysis method; instead of the Weibull process, the Power Law Process is introduced. The proposed change, which will simplify the failure analysis, was subjected to several suitability tests, the first being the Akaike Information Criterion test. The test showed that the Power Law Process model fits the analysed data better than the Weibull model. Next, the applicability was tested by comparing the results obtained with the Power Law Process analysis with previously published data using the Weibull method. After establishing the validity of the proposed changes, the functionality is tested on a new maintenance and spare parts optimization model, which is an extension of the model used in the Maintenance Concept Adjustment and Design method. In addition to simplifying the process, a further simplification is sought, namely the use of the brute force method to solve the optimization of maintenance and spare parts. The verification of the optimization results was carried out using Brent’s optimization method and the Limited memory Broyden–Fletcher–Goldfarb–Shanno method with Boundaries. Both methods confirmed the optimization results. Finally, the optimization results were verified using the Weibull model for failure data, which confirmed the validity of the proposal to modify the Maintenance Concept Adjustment and Design method in the failure data analysis and optimization method segment. Furthermore, this thesis deals with an additional modification of inventory policy in the maritime industry due to current laws and regulations, which has never been applied before. By introducing a safety critical spare parts minimum, a new safety barrier is created to prevent the consequences of a spare parts shortage. This new minimum is included in the optimization model and tested to see how this change affects maintenance and spare parts management. Initially, this will lead to additional costs for the company and increase the safety of the ship. Further analysis has shown that the cost of these spare parts is easily compensated by the avoidance of costs that may arise from the lack of spare parts
Vibration measurment
No full textTema ovog rada je mjerenje vibracija koje je važno za sigurnost svih brodova,
putnika i posade. Opisano je kako nastaju vibracije, na koji način se mjere, te su navedeni
uređaji za mjerenje istih. Rad detaljno analizira osnove vibracija, uključujući definicije,
vrste i uzroke. Nadalje, obrađuju se različite metode mjerenja vibracija, vrste senzora,
analiza i obrada podataka. Cilj ovog rada je pobliže opisati i objasniti kada i zbog čega
nastaju vibracije na brodovima, te analizirati karakteristike i parametre nastalih vibracija
pomoću senzora. Na temelju prikupljenih informacija zaključeno je da vibracije imaju
štetan utjecaj na brod i posadu.The topic of this work is vibration measurement, which is important for the safety
of all ships, passengers and crew. It is described how vibrations are created, how they are
measured, and the devices for measuring them are listed. The paper analyzes the basics of
vibrations in detail, including definitions, types and causes. Furthermore, different
vibration measurement methods, sensor types, data analysis and processing are covered.
The aim of this paper is to describe and explain in detail when and why vibrations occur on
ships, and to analyze the characteristics and parameters of the resulting vibrations using
sensors. Based on the collected information it was concluded that the vibrations have a
harmful effect on the ship and the crew
Mental health stigma in the work place
No full textNedovoljna informiranost o mentalnim poteškoćama i stereotipi koji ih okružuju
glavni su temelj stigmatiziranja osoba s mentalnim poteškoćama u svakodnevnom životu,
pa tako i na radnom mjestu. Stigmatiziranje kolega s mentalnim poteškoćama može dovesti
do poteškoća prilikom zapošljavanja, smanjenja radne učinkovitosti, narušavanja timskog
rada i ukupne komunikacije. Glavni cilj je istražiti i analizirati problematiku stigme
mentalnog zdravlja na radnom mjestu putem istraživanja stavova radno aktivnog
stanovništva u Zagrebu i Splitu. Sama svrha rada jest provjeriti postoji li stigma prema
osobama s mentalnim poteškoćama u radnom okruženju u dva najveća grada Republike
Hrvatske. Prema rezultatima provedenog istraživanja može se zaključiti kako još uvijek
postoji stopa stigmatiziranja osoba s mentalnim poteškoćama na radnom mjestu u Republici
Hrvatskoj, kako ispitanici smatraju osobe s mentalnim poteškoćama opasnima za osobe u
radnom okruženju i neugodnima u socijalnim situacijama.Insufficient information about mental disabilities and the stereotypes that surround
them are the main basis for stigmatizing people with mental disabilities in everyday life,
including in the workplace. Stigmatizing colleagues with mental disabilities can lead to
difficulties in employment, reduced work efficiency, disruption of teamwork and overall
communication. The main goal is to investigate and analyze the issue of mental health stigma
in the workplace by means of researching the attitudes of the working population in Zagreb
and Split. The very purpose of the work is to check whether there is stigma towards people
with mental disabilities in the working environment in the two largest cities of the Republic
of Croatia. According to the results of the conducted research, it can be concluded that there
is still a rate of stigmatization of people with mental disabilities at the workplace in the
Republic of Croatia, as respondents consider people with mental disabilities dangerous for
people in the work environment and unpleasant in social situations
Maneuvering the ship during entry and departure from port
No full textUpravljanje brodom tijekom uplovljavanja i isplovljavanja iz luke je složen proces. U ovom radu su kronološkim slijedom prikazane faze tog procesa, od pripreme za uplovljavanje, dokazanih i prokušanih metoda izvođenja manevra pristajanja i isplovljanja, korištenja peljara i tegljača za pomoć pri navedenim manevrima, do rada s lučkim vlastima i samog isplovljavanja iz luke. Glavni čimbenici o kojima ovisi uspješnost navedenog pomorskog pothvata su brod i njegove manevarske sposobnosti, vanjske sile od kojih se ističu prije svega utjecaj vjetra i morske struje, te ljudski faktor koji je najpresudniji od svih čimbenika.Maneuvering a ship during port entry and departure is a complex process. This master work describes in chronological order the stages of this process, from the preparations for arrival at port, the proven and tried-and-tested methods of docking and undocking, the use of pilots and tugboats to assist in these maneuvers, to the work with the port authorities and leaving the port. The main factors that determine the success of this maritime endeavor are the ship and its maneuverability, external forces, notably the influence of the wind and sea currents, and the human factor, which is the most decisive of all
The role of management in the quality management system
No full textU ovom radu govori se o ulozi uprave u sustavu upravljanja kvalitetom. U prva dva
poglavlja obrađuje se povijesni razvoj pojma kvalitete i sustava upravljanja kvalitetom.
Zatim se obrađuje uloga uprave u sustavu upravljanja kvalitete što je i tema rada. U
posljednjem dijelu temi se pristupa sa stajališta pomorske industrije te se obrađuju
pojedinosti i izazovi pomorske industrije i uprave u sustavu upravljanja kvalitete u
pomorskim organizacijama. Izneseno je istraživanje na temu uloge uprave u sustavu
upravljanja kvalitetom, provedeno nad poslovnim subjektima u pomorskoj industriji koji
posluju na području Republike Hrvatske. Na kraju je obrađeno nekoliko primjera pomorskih
organizacija u kontekstu teme rada.This paper discusses the role of management in the quality management system.
The first two chapters deal with the historical development of the concept of quality and the
quality management system. Then the role of management in the quality management
system, which is the topic of the paper, is discussed. In the last part, the topic is approached
from the point of view of the maritime industry, and the details and challenges of the
maritime industry and administration in the quality management system in maritime
organizations are discussed. Research on the role of management in the quality management
system was presented, conducted on business entities in the maritime industry that operate
in the territory of the Republic of Croatia. At the end, several examples of maritime
organizations were discussed in the context of the topic of the paper