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Određivanje koeficijenta prolaska topline
No full textDanas je mjerenje toplinskih svojstava postalo sve bitnije u svjetlu razvoja industrije i tehnologije. U radu su analizirani načini prijelaza topline kako bi se lakše mogli shvatiti i primijeniti na mjerenje toplinskih svojstava materijala, odnosno konkretno u ovom radu koeficijenta prolaska topline koji je najvažniji parametar pri ocjeni energetske učinkovitosti objekata. Predstavljeni su načini mjerenja koeficijenta prolaska topline u laboratoriju, kao i načini mjerenja na terenu - in situ. Pažnja je dana i normi ISO 9869 koja standardizira provedbu in situ mjerenja radi dobivanja što točnijih podataka.Nowadays measuring thermal properties is becoming even more important in the terms of industrial and technological development. This paper analyses means of heat transfer in order to understand them easier and apply them while measuring thermal properties of materials, or in this case, thermal transmittance, which is the most important parameter when evaluating energy efficiency of buildings. Various ways of laboratory thermal transmittance determination are presented, as well as in situ determination. Emphasis is given to ISO 9869 norm that standardizes conducting in situ determination for obtaining as accurate results as possible
Economics enterprise "Children's resort Slavonski Brod"
No full textU radu su obrađeni ekonomijski pokazatelji „Dječjeg odmarališta Slavonski Brod“ na otoku Hvaru. Objašnjeni su ključni pojmove ekonomike poduzeća koja kao ekonomska grana obuhvaća brojna pitanja korištenja ekonomskih resursa, vrsta, dinamike i kalkulacije troškova. Pritom naglasak je stavljen na primjeni temeljnih ekonomskih načela i praktičnih metoda za pripremu poslovnih odluka u poduzeću.
Osim ljetovanja, „Dječje odmaralište Slavonski Brod“ u svojoj ponudi pruža usluge ekskurzije za učenike, višednevne izlete, terensku nastavu, maturalna i apsolventska putovanja. Sadržajan i zabavan program, uz igru i mnogo kupanja u moru, pod stručnim vodstvom, kratak je opis ponude „Dječjeg odmarališta Slavonski Brod“ namijenjene djeci i mladima.The paper deals from economic indicators Children's resort Slavonski Brod resorts on the island Hvar. It explains the key concepts of economics enterprises which as an economic group includes a number of questions the use of economic resources, species, and dynamics and cost calculations. The emphasis is placed on the application of basic economic principles and practical methods for the preparation of business decisions in the company.
In addition to holidays, Children's resort Slavonski Brod in its offer provides excursions for pupils, multi-day trips, field work, graduation and advanced university student travel. Eventful and entertaining program, with the game and a lot of swimming in the sea, under the expert guidance, a brief description of the offer Children's resort Slavonski Brod intended for children and young people
Technical process of the top plate for the fireplace D1 model
No full textU radu je opisan tehnološki postupak izrade gornje ploče kod kamina "D" modela .U postupcima su opisani načini u kojima je došlo do izrade i montaže pojedinog dijela u potpuni sklop koji se na kraju montiranja na kamin.. Također su u radu objašnjene i analizirane obrade isjecanja, savijanja, tokarenja brušenja, zavarivanja, pjeskarenja i na kraju lakiranja. Prikazani su isto primjeri u proizvodnji gornje ploče koji se koriste.In this work the technological process of the production the top plate of the fireplace is described.. The top plate has been described- in the different ways and the installation procedure of each part in assembly at the end of the installation on the fireplace . Also, the work has been explained and analyzed in the work abrasion, bending, turning, welding, sandblasting and finishing. The same were examples of top plate manufacturing used in practice
Extraordinary dealers with special audit on the foreign agent
No full textVanjska trgovina je gospodarska djelatnost koja obuhvaća razmjenu roba i usluga sa inozemstvom, odnosno obuhvaća sveukupnu razmjenu materijalnih i ne materijalnih dobara između jedne ili više zemalja. Razmjena se može obaviti putem posrednika ili putem samostalnih poduzeća odnosno trgovaca. Danas je razmjena vrlo bitna za svaku zemlju i za cijeli svijet jer omogućava prodor zemalja u inozemstvo i dostupnost roba, usluga ili materijala koja neka zemlja ne posjeduje. Posrednici posluju za svoje ime ili račun ili za tuđe ime i račun uz određenu dogovorenu proviziju koja se dogovara ugovorima. Neki od posrednika jesu brokeri, faktori, dileri, komprador, biroi, CIF agent i ostali. Ali je najzastupljeniji korišteni posrednik inozemni posrednik. On je po kontinentalnom pravu, tvrtka, fizička osoba koja radi za ime i račun svoga nalogodavca kojeg stalno i javno zastupa na tržištu koji nalogodavac traži.Foreign trade is an economic activity that involves the exchange of goods and services abroad, is covers the total exchange of material and non-material goods between one or more countries. Exchange can be done through intermediaries or through independent companies or traders. Today, exchange is very important for every country and for the whole world as it allows the penetration of countries abroad and the availability of goods, services or materials that some country does not own. Agents act for their name or account or for someone else's name and account with a certain agreed contract that is contracted. Some of the brokers are brokers, factors, dealers, distributors, brokers, CIF agents and others. But the most widely used mediator is an international broker. He is a continental right, a company, a natural person who works for the name and account of his principal who is constantly and publicly represented on the market that the originator is seeking
Production of a conical flat toothed gear
No full textRad opisuje izradu zupčanika s ravnim zubima. U uvodnom dijelu rada opisan je općeniti dio stoţastih zupčanika, gdje se primjenjuju, kakve vrste postoje, prednosti i nedostatci stoţastih zupčanika. Opisani su i svi postupci obrade odvajanjem čestica koji su korišteni pri izradi. Opisan je slijed tehnoloških operacija kojima se od početnog materijala (šipke) dolazi do stoţastog zupčanika. Navedena je toplinska obrada koja je upotrijebljena za izradu stoţastog zupčanika s ravnim zubima.
Eksperimentalnim putem utvrĎeno je kako izrada stoţnika s ravnim zubima zahtjeva dosta vremena za odabir materijala i njegovu izradu.This paper describes production procedure of a conical flat toothed gear. Introduction part of this paper describes conical gears in general, describes where conical gears are used, what types exist and what are their advantages and disadvantages. Next chapter describes all types of metal cutting procedures used in production of conical flat toothed gear. Sequence of all technological operations used in order to get a conical gear from raw material (rod) is also described. Heat treatment used to get final product is mentioned next.
Using experimental procedure it was identified that production of a conical flat toothed gear takes a lot of time for selecting right materials and for the production
Engine cooling system
No full textPregrijavanje motora, odnosno nedozvoljena visoka temperatura njegovih pojedinih dijelova,
može prouzročiti prijevremeno paljenje radne smjese kod otto-motora (od usijanih elektroda
svjećica, čestica gareži,..) kao i pojavu detonacijskog izgaranja. Kod svih vrsta motora
prekomjerna temperatura motora može prouzročiti havariju motora. Održavanje temperature u
određenom području povezano je i s dozvoljenom temperaturom ulja (manja od 250 °C) , kao i
osobinama rashladnog fluida.
Zbog navedenih razloga motor se mora hladiti, njegova temperatura održavati u odgovarajućim
radnim granicama. Hlađenje motora može biti tekućinom ili zrakom.Overheating of motors (excessively high temperature of certain parts inside) can cause early
ignition of working mixture with otto-motors (caused by red hot electrodes, spark plugs and
other particles,.) as well as detonation combustion. In other words, overheating of any type of
motors can cause malfunctions. Keeping the temperature at a certain level is tightly connected to
the allowed oil temperature (less than 250 celsius) as well as the properties of the coolant fluid.
Due to the reasons stated above, motors must be cooled and its temperature must be kept at
appropriate working conditions. Engine cooling can be done with either air or fluids
The meaning of fresh fruits and vegetables for health
No full textCilj ovog istraživanja je probuditi svijest o zdravoj prehrani i njezinom utjecaju na zdravlje. U današnje vrijeme, ljudi su izloženi stresnim situacijama i ubrzanom načinu života, s jako lošom prehranom koja je uglavnom bogata ugljikohidratima, zasićenim masnim kiselinama, rafiniranim šećerima, uljima i tako dalje. Pritom ne shvaćaju kako veliki utjecaj prehrana ima na zdravlje. Upravo ovim jednostavnim načinom pripreme moguće je ljudima probuditi svijest o važnosti sirove prehrane. Razne vrste voća i lisnatog povrća, koje je prikazano na slikama, omogućuju sav potreban unos hranjivih tvari za ljudski organizam. Na ovakav način je prikazana sva ljepota prirodnih proizvoda, ljekovitih sastojaka, koji pomažu u svim bolestima kao i u prevenciji od tumora i ostalih ozbiljnih bolesti. Gledano u cjelini usporedbe nutritivnih vrijednosti između tamnozelenog lisnatog povrća i bilo koje druge svježe biljne hrane, ili hrane životinjskog porijekla, ono je prepuno svih vitamina i minerala koji su nam potrebni, i to u najvećoj količini. Precizno i stručno su analizirani svi važni hranjivi elementi tamno zelenog lisnatog povrća, kemijski sastav i također usporedba s korjenastim i ostalim povrćem. U zadnjem dijelu rada objašnjena su ljekovita svojstva lisnatog povrća, zašto su miksani sokovi u prednosti od cijeđenih, i zašto je ljudskom tijelu uopće potrebno zelene povrće.The aim of this research is to awaken the awareness about healthy diet and it's impact on health. Nowadays, people are exposed to stressful situations and hectic lifestyle, with very poor diet which is mostly rich with carbohydrates, saturated fatty acids, refined sugars, oils and so on. While they don't realize how their diet has a great influence on their health. With this simple way of preparation, it is possible for people to awake the awareness about importance of raw food. Different kind of fruit and green leafy vegetables, shown on the photos, provide all needed nutrients for human organism. In this way, all the beauty of natural products, healing remedies, that help in lots of illnesses as well as in the prevention of tumors and other sereious diseases was shown. Looking at the overall, comparaton of nutritive values between dark-green leafy vegetables and any other fresh vegetable food or animal food, leafy vegetables are full with all vitamnis and minerals that we need in the greatest amount. Every nutrient of dark-green leafy vegetables is precisely and professionally analyzed, and also chemical content and comparison with root crops and other vegetables. In the last part of this paper, healing properties of dark-green leafy vegetables were explained, why are mixed juices in advantageous in front of squeezed juices and why do we need green vegetables after all
3D model turbine tool with a turbine door
No full textModeliranje je važan dio u proizvodnji nekog novog proizvoda ili usavršavanju tog proizvoda. Tako ovaj rad opisuje modeliranje turbinskog ležaja i brtve turbinskog vratila prema dobivenoj tehničkoj dokumentaciji u 3D model pomoću Solidworks programa gdje su prikazani svi dijelovi pojedinačno s ciljem poboljšavanja određenih sklopova. Pri izradi govori se o 3D modeliranju te hidroelektranama na rijeci Dravi, a posebice o hidroelektrani Čakovec i njezinim specifičnostima. Nakon kratkog uvoda prelazi se na glavnu temu ovog rada što je turbinski ležaj i brtva turbinskog vratila. Sve je to obrazloženo i izmodelirano u 3D programu. Pri završetku rada govori se i o renderiranju koje je korišteno pri izradi slika radi lakšeg uvida u sklopove.3D designing is an important aspect of manufacturing a product or perfecting on. This assignment describes 3D designing of a turbine bearing whit a turbine shaft seal according to a given technical drawing into a 3D model using Solidworks, where all individual parts are shown whit goal of improving specific assemblies. We talk about 3D designing and hydroelectric power stations on the river “Drava” and especially about the hydroelectric power station “Čakovec” and its specifications. After the short introduction we come to the main subject of the assignment, which are turbine bearings and turbine shaft seals. It’s all explained and designed in the 3D program. At the end of the assignment we talk about rendering which is used in the making of images for easier insight on the assemblies
Construction of cleaning and roofing devices
No full textDanas je velika primjena vozila i priključnih sredstava, kako teretnih, tako i poljoprivrednih u razne svrhe obavljanja poslova. Tim radom se njihovi kotači ne namjerno prljaju i izlaze na prometnice. S obzirom na zakon o zabrani iznošenja blata na prometnice važno je očistiti kotače, u suprotnom je kažnjivo.
Uzimajući u obzir zakon i problem današnjice u prometu, ideja vodilja je bila napraviti uređaj kojemu je svrha čišćenje kotača prije izlaska na prometnice, vodeći se tom idejom krenulo se sa konstruiranjem i proračunom uređaja za pranje kotača koji bi omogućio radnicima lakše i brže pranje i čišćenje te ujedno i poštivanje zakona i sigurnosti u prometu.
Ideja o uređaju je da bude dostupan uvijek i svugdje. Vodeći se prema toj ideji zaključeno je da uređaj za pranje mora biti na samom vozilu. Stoga se modelirao uređaj, te izvršio proračun kako bi se uređaj mogao montirati na vozilo, a pri tome ne ometati njegovu glavnu namjenu.
Kroz završni rad biti će objašnjeno konkretno idejno rješenje jednog prototipa uređaja za pranje i čišćenje kotača.Today, there is a great application of vehicles and connecting means, both freight and agricultural, for various purposes of doing business. With this work, their wheels unintentionally toss, and go to the roads. With regard to the law on prohibition of mud removal on roads, it is important to clean the wheels, otherwise is punishable.
Taking into account the law and the problem of today, I started with the idea of a device that was intended to clean the driver before going on the road, taking this idea I started with the conditioning and calculation of the washing machine that would allow the workers easier and quicker washing and cleaning and at the same time respect law.
The idea of the device is to always be available everywhere, so I decided that the washing machine had to be on the vehicle itself, so I modeled the device as well and budgeted so that it could be mounted on the vehicle and not hindered its main purpose. Through the final work I will try to explain the concrete conceptual design of a prototype of the washing and cleaning wheel
The major economic crisis in the United States
No full textKriza označava nepovoljno, neželjeno, loše stanje koje karakterizira manjak radnih mjesta, visoka stopa nezaposlenosti, nizak životni standard, nezadovoljstvo. Temeljni uzroci koji dovode do ovakvoga stanja su pogreške menadžmenta, gubitak tržišta, financiranje, konkurencija, loši krediti. Nastalu krizu treba rješavati krizni menadžment (ljudi sa dovoljno snage i znanja da sa svojim odlukama promijene krizno stanje). Sjedinjene Američke Države svoj zlatni vijek proživljavaju od 1920. do 1925. godine. Velika gospodarska kriza službeno je započela slomom burze 24. listopada 1929. u New Yorku na tzv. „crni četvrtak“, a do konačne katastrofe je došlo nakon par dana, na „crni utorak“. Glavni problemi i posljedice ove ekonomske krize su bili nezaposlenost, siromaštvo. Franklin D. Roosevelt i John M. Keynes osmislili su program New Deal kako bi se svladale posljedice velike depresije koja je izbila 1929. Vođeni tim programom, Sjedinjene Američke Države nakon nekoliko godina izlaze iz krize i postaju vodećom svjetskom velesilom na većini područja.The crisis indicates negative, unwanted, bad condition characterized by a lack of jobs, high unemployment, low living standard, dissatisfaction. The fundamental causes of this situation are errors of management, loss of markets, financing, competition, bad loans. The resulting crisis should be dealt with crisis management (people with enough power and knowledge that with your decisions change the state of crisis). United States its golden age experiencing from 1920 to 1925. Great economic crisis officially began the collapse of the stock market October 24, 1929 in New York at the so-called. "Black Thursday", and to the final disaster occurred a few days after, on "Black Tuesday". The main problems and consequences of the economic crisis were unemployment, poverty. Franklin D. Roosevelt and John M. Keynes was designed by the New Deal program to overcome the consequences of the great depression which broke out in 1929. Guided by this program, the United States after several years out of the crisis and become a leading world power in most areas