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APPLICATION OF UNMANNED AIRCRAFT IN FOREST FIRE PROTECTION
No full textU ovom radu dan je pregled upotrebe bespilotnih letjelica u funkciji zaštite šuma od požara. Objašnjene su različite strategije upotrebe bespilotnih letjelica, koordinacije i ključni instrumenti detekcije u području zaštite šuma od požara. Suzbijanje šumskih požara velikih razmjera može imati velike koristi od upotrebe bespilotnih letjelica. Autonomija, pouzdanost i otpornost na pogreške neka su od preostalih ograničenja u Hrvatskoj i svijetu. Bespilotne letjelice koja prevoze vodu i sredstva za usporavanje požara izložene su opasnosti od izgaranja, pada i pogrešaka što izaziva zabrinutost u pogledu sigurnosti. Unatoč tome, postoji mnogo prednosti korištenja bespilotnih letjelica i moglo bi potaknuti nove ideje za rješavanje ovih problema.This paper provides an overview of the use of unmanned aerial vehicles in the function of forest fire protection. Various strategies for the use of unmanned aerial vehicles, coordination and key detection instruments in the field of forest fire protection are explained. Suppression of large-scale forest fires can greatly benefit from the use of drones. Autonomy, reliability and resistance to errors are some of the remaining limitations in Croatia and the world. Unmanned aerial vehicles carrying water and fire retardants are exposed to the risk of burning, crashing and malfunctioning, raising safety concerns. Nevertheless, there are many advantages to using drones and it could spark new ideas to solve these problems
TEST RIG FOR HIGH PERFORMANCE PUMPS
No full textOvaj diplomski rad sastoji se od dva dijela, teorijskog i eksperimentalnog. U teorijskom dijelu je opisana osnovna podjela pumpi, njihove karakteristike te područja u kojima se koriste. Opisane su veličine koje određuju karakteristiku svake pumpe, a to su protok, visina dobave, snaga i efikasnost. Još su navedene greške koje se javljaju, vrste održavanja pumpi te karakteristike pumpi za rad u ekstremnim uvjetima. U eksperimentalnom dijelu je opisan odabir materijala i elektomotora za pumpu za rad u ekstremnim uvjetima. Opisana su mehanička opterećenja, vibracije te uzroci vibracija. Prikazan je postupak računanja debljine izolacije cjevovoda. Nadalje, u programu SolidWorks prikazana je analiza naprezanja spiralnog kućišta. Na kraju je ispitana pumpa IRP S6 80-200 F12 te prikazano idejno rješenje za ispitivanje pumpe u stvarnim uvjetima.This graduation thesis consists of two theoretical and one experimental. The theoretical part describes the basic division of pumps, their characteristics and the areas in which they are used. Sizes that determine the characteristics of each pump are described, namely flow, delivery height, power and efficiency. Errors that occur, types of pump maintenance and pump characteristics for working in extreme conditions are also described. In the experimental part, the selection of materials and electric motor for the pump for operation in extreme conditions is described. Mechanical loads and causes of vibrations are described. The procedure for calculating the thickness of the pipeline insulation is presented. Furthermore, the SolidWorks program shows the stress analysis of the spiral casing. At the end, the IRP S6 80-200 F12 pump was tested, and the conceptual solution for testing the pump in real conditions was presented
FIRE PROTECTION SYSTEM AT ZAGREB AIRPORT
No full textAerodromski priručnik Međunarodne zračne Luke Zagreb d.d. (i daljnjem tekstu: Operator aerodroma) jasno i sažeto opisuje radne aktivnosti Operatora aerodroma usmjerene na sigurno i učinkovito upravljanje Zračnom lukom. Aerodromski priručnik vlasništvo je: - Međunarodna zračna luka Zagreb d.d. - Ulica Rudolfa Fizira 1, Grad Velika Gorica, 10410 Velika Gorica, RH Aerodromski priručnik u cijelosti je usklađen sadržajno sa Zakonom o zračnom prometu, Uredbom (EU) 2018/1139 o primjenjivim odredbama Uredbe (EU) 139/2014, a formom s dokumentom ,,Postupak upravljanja dokumentima i zapisima- CC-IMS-PR-01“ Primjena operativnih postupaka sadržanih u Aerodromskom priručniku obvezna je za sve zaposlenike Operatora aerodroma. Sve pravne i fizičke osobe koje obavljaju gospodarske, administrativne ili neke druge aktivnosti na području Zračne luke su obavezne svoje aktivnosti uskladiti s odredbama ovog Priručnika.Airport manual of Zagreb International Airport d.d. (and hereinafter: Airport Operator) clearly and concisely describes the work activities of the Airport Operator aimed at the safe and efficient management of the Airport. The airport manual is the property of: - Zagreb International Airport d.d. - Rudolfa Fizira Street 1, City of Velika Gorica, 10410 Velika Gorica, Republic of Croatia The airport manual is fully harmonized in content with the Air Traffic Act, Regulation (EU) 2018/1139 on the applicable provisions of Regulation (EU) 139/2014, and in form with the document "Procedure for managing documents and records - CC-IMS-PR-01 " Application of operational procedures contained in the Airport Manual is mandatory for all employees of the Airport Operator. All legal and natural persons who perform economic, administrative or other activities in the area of the Airport are obliged to harmonize their activities with the provisions of this Manual
DESING OF THE CLAMPING DEVICE FOR DRILLING THE SHUTTER CARRIER GUIDE VHS-2/HELLION
No full textOvaj završni rad bavi se temom projektiranja, konstrukcije i analize stezne naprave za bušenje vodilice nosača zatvarača VHS-2 / Hellion. Stezne naprave služe za fiksiranje obratka u stroju prilikom različitih operacija obrade, odnosno tijekom operacija tokarenja, glodanja ili u ovom slučaju bušenja obratka, kako bi se osigurala što veća preciznost izvođenja te rad na siguran način. U prvom dijelu završnog rada obrađena je osnovna teorija steznih naprava općenito, njihova konstrukcija te osnovne skupine steznih naprava kao i specijalizirane naprave u proizvodnji oružja. Drugi dio rada sadrži postupak projektiranja i same konstrukcije stezne naprave. Detaljno su opisani svi koraci projektiranja, od definiranja zahtjeva i specifikacija za napravu, preko izrade tehničke dokumentacije, do odabira materijala i tehnologije obrade te analiza grešaka u koracima konstrukcije i proizvodnje. U završnom dijelu rada obuhvaća se praktična primjena naprave, uključujući testiranje i procjenu njezine učinkovitosti u stvarnim uvjetima odnosno u radu na stroju HAAS VF-3SS u pogonu cijevi tvrtke HS Produkt.This final paper deals with the topic of design, construction and analysis of the clamping device for drilling the shutter carrier guide VHS-2 / Hellion. Clamping devices are used to fix the workpiece in the machine during various processing operations, i.e. during turning, milling or, in this case, drilling of the workpiece, in order to ensure the highest possible precision of execution and work in a safe manner. In the first part of the final thesis, the basic theory of clamping devices in general, their construction and the basic groups of clamping devices as well as specialized devices in the production of weapons are dealt with. The second part of the work contains the design process and the construction of the clamping device itself. All design steps are described in detail, from defining the requirements and specifications for the device, through the creation of technical documentation, to the selection of materials and processing technology, and the analysis of errors in the construction and production steps. The final part of the work includes the practical application of the device, including testing and evaluating its effectiveness in real conditions, i.e. in work on the HAAS VF-3SS machine in the HS Produkt compan
MARKETING ON SOCIAL NETWORKS ON THE EXAMPLE OF SWEET CALIFORNICATION
No full textDruštvene mreže su postale ključni fenomen digitalnog doba, oblikujući način na koji se pojedinci i zajednice povezuju, komuniciraju i razmjenjuju informacije. Sveprisutnost ovih platformi donijela je brojne prednosti, ali i izazove, posebice u kontekstu privatnosti, sigurnosti i utjecaja na društveno ponašanje. Cilj ovog rada je istražiti utjecaj društvenih mreža na suvremeno društvo, analizirajući njihove koristi, rizike, te njihovu ulogu u poslovnim strategijama i oblikovanju javnog mišljenja. Rad se temelji na analizi sekundarnih izvora podataka, uključujući znanstvene članke, izvještaje i istraživanja vezana za društvene mreže. Pregledom literature obuhvaćeni su ključni aspekti povijesnog razvoja, trenutno najpopularnije platforme i njihova sve veća primjena u poslovnom sektoru. Analiza također uključuje studiju slučaja kompanije na društvenoj mreži Instagram, s ciljem razumijevanja angažmana korisnika i poslovnih strategija na društvenim platformama. Rezultati istraživanja pokazuju kako društvene mreže igraju značajnu ulogu u povezivanju korisnika, razvoju digitalnih zajednica, ali i stvaranju informativnih i oglašivačkih platformi koje utječu na društvene norme i individualne percepcije. No, prisutni su i izazovi poput dezinformacija, narušavanja privatnosti te negativnog utjecaja na mentalno zdravlje korisnika. Naglašena je potreba za daljnjim istraživanjem i reguliranjem društvenih mreža kako bi se maksimizirale njihove prednosti, a minimalizirali rizici po korisnike i društvo u cjelini.II SUMMARY Social networks have become a key phenomenon of the digital age, shaping the way individuals and communities connect, communicate, and exchange information. The ubiquity of these platforms has brought numerous advantages but also challenges, particularly in the context of privacy, security, and their impact on social behavior. The aim of this paper is to explore the impact of social networks on contemporary society, analyzing their benefits, risks, and their role in business strategies and shaping public opinion. The paper is based on an analysis of secondary data sources, including scientific articles, reports, and research related to social networks. The literature review covers key aspects of historical development, currently most popular platforms, and their increasing application in the business sector. The analysis also includes a case study of a company on the social network Instagram, with the goal of understanding user engagement and business strategies on social platforms. The research results show that social networks play a significant role in connecting users, developing digital communities, as well as creating informative and advertising platforms that influence social norms and individual perceptions. However, there are also challenges such as misinformation, privacy breaches, and negative impacts on users' mental health. There is an emphasized need for further research and regulation of social networks to maximize their benefits while minimizing risks for users and society as a whole
REACTIVE MAINTENANCE OF MECHINING CENTER
No full textU ovom radu opisan je opći postupak održavanja i detaljan postupak održavanja više- operacijskog obradnog centra. Navedeni su svi dnevni, tjedni, mjesečni, tromjesečni, polugodišnji, godišnji i dvogodišnji postupci održavanja, čišćenja i provjera. Projektirana su dva tehnološka postupka izrade vrlo složenog strojnog dijela: jedan tehnološki postupak za izradu na više-operacijskom obradnom centru, a drugi na klasičnim alatnim strojevima. Postupci su međusobno komparirani te su analizirani dobiveni podatci. U praktičnom dijelu opisano je interventno održavanje više-operacijskog obradnog centra kojem je detektirano oštećenje na kuglično navojnom vretenu „X“ osi, zbog kojeg daljnji rad u zadanoj točnosti nije bio moguć. Jedino moguće rješenje je interventno popraviti obradni centar. Opisan je postupak podešavanja geometrije i laserskog umjeravanja stroja, te je uspoređen mjerni protokol izrađevine prije i poslije interventnog zahvata.This thesis describes the general maintenance procedure and the detailed maintenance procedure of a multi-operation machining center. All daily, weekly, monthly, quarterly, semi- annual, annual, and biannual maintenance, cleaning, and inspection procedures are listed. Two technological processes for the production of a very complex machine part were designed: one manufacturing process for production on a multi-operation machining center and the other on conventional machining tools. The procedures were compared with each other, and the obtained data was analyzed. The practical part describes the reactive maintenance of a multi-operational machining center in which the damage on the ball screw spindle of the "X" axis was detected, due to which further work with the specified accuracy was not possible. The only possible solution is reactive maintenance of the machining center. The procedure for adjusting the geometry and laser calibration of the machine is described, and the measurement protocol of the product before and after the maintenance is compared
SAFE FORKLIFT MAINTENANCE
No full textOvaj rad opisuje radni stroj viličar te siguran način rada na održavanju viličara, postupci
pregleda i održavanja viličara, rad na siguran način pri rukovanju viličarom te postupke i
mjere za sprječavanje ozljeda na radu. Opisat će se osnovni dijelovi viličara, opasnosti
koje prijete kod rukovanja viličarom te postupci koji se moraju provoditi prije, tijekom i
nakon završetka korištenja viličara.This paper describes the forklift machine and safe forklift maintenance, safe forklift
handling, and the procedures and measures to aviod injuries during work. Main forklift
parts will be described, as well as dangers that may occur during forklift handling and the
procedures which should be done before, during, and after forklift usage
FOOD PROCESSING AND NUTRITIONAL NEEDS OF YOUNG HANDBALL PLAYERS
No full textPodručje sportske prehrane tema je kojom se bavi premalo stručnjaka. Posebice je slabo zastupljeno područje prehrane mlađih dobnih kategorija sportaša. Pristup prehrani sportaša treba biti gotovo pa individualan, odnosno ovisi o sportu, dobi i broju treninga. Danas, u mlađim dobnim kategorijama sportaša, informacije o prehrani moguće je dobiti samo preko eventualno educiranih trenera ili edukacijom na internetu, što nije kontrolirano. Stoga može se ustanoviti kako je provedba edukacije na svim razinama društva ili sportskih klubova poželjna odnosno nužna i treba postati obavezna. Cilj predmetnog rada bio je provesti istraživanje po pitanju prehrane mladih rukometaša i utjecaj prehrane na njihovu spremnost za intenzivne treninge, te koja prerađena hrana je poželjna na jelovnicima kako bi se zadovoljile nutritivne i energetske potrebe uz eventualne dodatke prehrani.The field of sports nutrition is a topic that is dealt with by too few experts. The area of nutrition for younger age categories of athletes is particularly poorly represented. The approach to nutrition for athletes should be almost individual, that is, it depends on the sport, age and number of training sessions. Today, in the younger age categories of athletes, information about nutrition can only be obtained through possibly educated trainers or through education on the Internet, which is not controlled. Therefore, it can be established that the implementation of education at all levels of society or sports clubs is desirable or necessary and should become mandatory. The aim of the subject work was to conduct research on the nutrition of young handball players and the influence of nutrition on their readiness for intensive training, and which processed foods are preferred on menus in order to meet nutritional and energy needs with possible nutritional supplements
RADIOACTIVITY AND IONIZING RADIATION
No full textU ovome radu ću objasniti što je ionizirajuće zračenje, kako ono utječe na čovjeka, iz kojih izvora dolazi, vrste zračenja te način prolaska kroz materiju kako zbrinjavamo radioaktivni otpad i kako računamo radioaktivni raspad. Spomenuti ćemo i neke bolesti ili ozljede uzrokovane zračenjem te naprave za otkrivanje zračenja ( detektori).The final paper will explain ionizing radiation, its discovery and action, types of radiation and the passage of radiation through matter. It will describe how to calculate the number of nuclei that will disintegrate after a certain lapse of time and about the impact of radiation on humans and possible injuries caused by ionizing radiation. It will also be written about ionizing radiation detectors and their application
ELEMENTS OF CONTRACTUAL RELATIONS OF STAKEHOLDERS IN CONSTRUCTION WORKS
No full textUgovor o građenju je pravni dokument koji regulira proces izgradnje objekta. Bitni sastojci ugovora uključuju detaljan opis radova, utvrđenu cijenu, rokove izvođenja te obvezu izvođača. Vrste ugovora mogu biti fiksne ili otvorene, ovisno o tome da li cijena i rokovi ostaju nepromijenjeni ili se prilagođavaju tijekom izvođenja radova Dijelovi ugovora obuhvaćaju investitora (naručitelja) koji je vlasnik ili investitor objekta, te izvođača radova koji je odgovoran za izgradnju prema dogovorenim uvjetima. Ugovor o građenju obilježen je visokim rizikom zbog mnogih nepredvidivih čimbenika koji mogu utjecati na tijek i ishod izgradnje. Jamstveni rok predstavlja period tijekom kojeg izvođač odgovara za eventualne nedostatke ili kvarove na izgrađenom objektu i obvezan ih je otkloniti. Raskid ugovora može se dogoditi uz ili bez naknadu štete, ovisno o uvjetima predviđenim u samom ugovoru. Sporovi koji nastaju u vezi s izvođenjem radova često se rješavaju putem arbitraže ili sudskom tužbom, kako bi se odlučilo o eventualnim nesuglasicama i sporovima između ugovornih strana.The construction contract regulates the construction of a building, and its essential elements include the description of works, price, deadlines, and the contractor's obligations. The types of contracts can be fixed or open, depending on whether the price and deadlines remain unchanged or are adjusted during the execution of the works. The participants in the contract include the investor (client) who owns or invests in the project, and the contractor who is responsible for the construction according to the agreed terms. The construction contract is characterized by high risk due to many unpredictible factors that can influence the progress and outcome of the construction. The warranty period represents the time during which the contractor is liable for any defects or faults in the constructed building and is obligated to rectify them. The contract may be terminated with or without compensation, depending on the conditions specifiled in the contract itself. Disputes arising from the execution of the works are often resolved through arbitration or by filing a lawsuit, in order to decide on any disagreements and disputes between the contracting parties