1,721,266 research outputs found
MAIN WATERWORKS FROM CONCEPT TO EXPLOITATION
Full text linkTo diplomsko delo obravnava magistralne cevovode, ki so opisani skozi zgodovino, njihove splošne karakteristike, značilnosti in primere na obalno kraškem območju in delno v hrvaški Istri. Projektiranje omenjenih cevovodov je redek izziv projektanta, zato so pa tudi možne napake, ki lahko nastanejo kljub poznavanju vodovodnih naprav in hidravlike. Diplomska naloga vsebuje nekaj zanimivih podatkov, ki so se nabrali z dolgoletnim delom avtorja na Rižanskem vodovodu Koper in so tu predstavljeni. Razumevanje dobrih in slabih lastnosti delovanja obstoječih naprav pripomore k dopolnjevanju znanja na tem področju gradbeništva.This bachelor\u27s dissertation deals with the history of magistral pipelines , their general characteristics and properties as well as with the description of some examples built in the carsic region and in the croatian Istria. The design of magistral pipelines is a rare challenge in everyday\u27s life and therefore mistakes in their design can occur, no matter how experienced the projecting engineer may be. In the bachelor\u27s dissertation some interesting information collected by the author through his years of work at "Rižanski vodovod Koper" is reported. The author believes that a thorough understanding of good and bad aspects in the functioning of existing devices can help to improve the knowledge in this field of civil engineering
Phase transitions in the public goods game on networks
Full text linkV magistrskem delu preučujemo evolucijo kooperacije v igri javnih dobrin na dveh kvalitativno različnih interakcijskih mrežah ob različnih začetnih pogojih. S pomočjo numeričnih simulacij, minimalističnih modelnih pristopov in metode Monte Carlo se osredotočimo na efekte, ki so odvisni od različne velikosti skupin agentov in različnega sinergijskega faktorja. Modelu dodamo še dodatne strategije individualnega kaznovanja in nagrajevanja, pri čemer nas zanima kako vrednost kazni ali nagrade ter cena kazni ali nagrade vpliva na evolucijo strategij. Da raziščemo robustnost kooperacije med agenti prikažemo časovni potek evolucije igre javnih dobrin na 2D krajevnih slikah in tudi fazne diagrame s katerimi področja strategij natančneje opredelimo. Fazne prehode med čistimi in mešanimi strategijami kvalitativno določimo in napovemo zveznost ali nezveznost le teh. Rezultati in ugotovitve študije takšnega socio-ekonomskega problema kažejo na primernost metod statistične fizike in teorije grafov na raziskovanje izven meja splošne fizike.In this thesis, we study the evolution of cooperation in the public goods game in two qualitatively different interaction networks, and with different initial conditions. By means of Monte Carlo numerical simulations, we focus on the effects that are brought about by different group sizes of agents and by different enhancement factors that govern the multiplication of accumulated public goods. We also consider the public goods game with punishment and reward, and in particular on the impact of these additional strategies on the outcome of the evolutionary game. To investigate the evolution of cooperation, we present time courses of the spatial distribution of strategies and phase diagrams, in which we precisely define the various stable phases in different regions of the parameter space. We determine the properties of the phase transitions between pure and mixed strategies in terms of their continuity in dependence on the parameter change. We conclude that the study of socio-economic problems in general can benefit significantly from the application of methods of statistical physics
Metode linearne in nelinearne analize časovnih vrst pri vrednostnih papirjih in vrednotenje naložbenih življenjskih zavarovanj
No full textEVOLUTIONARY GAME THEORY AS A SPIN SYSTEM
Full text linkOčitno je, da se naše podnebje spreminja in s tem ustvarja globalni problem, s katerim se moramo spopasti na mednarodni ravni. Podnebne spremembe so zato obravnavane kot primer največje socialne dileme, s katero se človeštvo sooča. Zakaj? Učinki podnebnih sprememb niso enakomerno razporejeni po celem svetu. Rezultat je klasičen problem, ki se ustvari kadar imamo opravka z javnimi dobrinami. Globalno-podnebni problem lahko uspešno rešimo samo na način, ki bo zagotovil mednarodno koordinacijo skupnih aktivnosti, kjer bodo sodelovale vse države sveta. Stroški posamezne države se lahko kaj hitro izračunajo, medtem ko bodo koristi porazdeljene med vse "igralce", neodvisno od njihovih dejanskih prispevkov k trajnostnemu razvoju. Evolucijska teorija iger je eno izmed najprimernejših teoretičnih orodij za preučevanje izzivov na področju podnebnih sprememb, s pomočjo katere bomo definirali glavne kriterije za evolucijo uspešnega sodelovanja. Svet je spoznal, da obvladovanje podnebnih sprememb povzroča stroške in zato bo nagnjenost k onesnaževanju vedno prisotna. Zato se vprašamo, ali lahko stohastični vplivi, kompleksne interakcijske mreže in koevolucija v podnebni igri zvišajo verjetnost prevzema čistejše strategije? Uporabljene so metode statistične fizike, Monte Carlo simulacije in igra zapornikove dileme z namenom podati nove odgovore na vprašanje kako rešiti naše podnebje in zaustaviti globalno segrevanje. Zapornikova dilema je še posebej primerna, saj proučuje evolucijo sodelovanja med sebičnimi posamezniki, kjer je kooperacija vprašljiva zaradi mamljivosti izbire strategije defekcije, hkrati pa lahko dilemo obravnavamo kot spinski sistem, in na ta način vpeljemo fizikalni pristop obravnave podnebnega problema.It is obvious that the climate change is underway, constituting a pressing global problem that needs to be dealt with at the global level. Tackling climate change means tackling the biggest social dilemma in the human history. Why? Because the adverse effects of climate change are not equally distributed across the world, the result being that this is a classical problem of dealing with global goods on a massive scale. Climate change mitigation can be successful only if the whole world will undertake an internationally coordinated collective action. Costs to reduce emissions of greenhouse gases can be easily calculated for each individual, but benefits of the successful reduction will be distributed among all the "players", independently of their actual contributions to sustainable development. Evolutionary game theory provides a suitable theoretical framework for studying the challenges of climate change, and we will reveal the main criteria for the successful evolution of cooperation. It has namely become painfully obvious that alleviating the negative consequences of the climate change will be costly, and accordingly, the temptations to pollute will always be present. Thus, we ask whether unpredictability, complex interaction networks and coevolution can increase the probability of adopting the cleaner strategy? We employ methods of statistical physics, Monte Carlo simulations and the spatial prisoner\u27s dilemma game in order to provide new insights and answers that may help us to save our climate by stopping the adverse changes. The prisoner\u27s dilemma game is particularly suited as it captures the essence of the problem when cooperative individuals are faced with temptations to resorting to the defective strategy, while at the same time the dilemma can be treated as a spin system, thus enabling a physics-inspired treatment of the climate problem
Effects of mixing and complex interactions on the evolution of cooperation in the public goods game
Full text linkRazumevanje razvoja sodelovanja med posamezniki, ki so v osnovi sebični, je eden najpomembnejših izzivov današnjega časa, ki vzbuja zanimanje raziskovalcev iz različnih področij. V ta namen znanstveniki integrirajo evolucijsko teorijo iger z naprednimi metodami s področja znanosti o omrežjih in metodami statistične fizike. V doktorski disertaciji smo s pomočjo takega interdisciplinarnega pristopa raziskali, kako različni tipi mobilnosti oziroma mešanj igralcev na različnih interakcijskih mrežah vplivajo na evolucijo in promocijo sodelovanja v igri javnih dobrin. V ta namen smo raziskovalno delo razdelili v štiri sklope. V prvem delu smo pokazali, da uvedba mešanja igralcev v igri javnih dobrin na regularnem omrežju omogoči prehod iz stanja sistema vpetega v prostorsko mrežo v stanje dobro mešane populacije, kjer struktura interakcijske mreže več nima bistvenega pomena na evolucijsko dinamiko. Izkaže se, da je v primeru mešanja najbližjih sosedov za to potrebna večja frekvenca mešanja kot pri mešanju naključnih igralcev. Nadalje smo pokazali, da oba načina mešanja zavirata evolucijski uspeh kooperatorjev. V nadaljevanju smo raziskavo razširili na področje kompleksnih omrežij, ki podajajo realnejši opis interakcij med posamezniki. V drugem delu doktorske disertacije smo tako igro javnih dobrin postavili na naključno omrežje, vpeto v hiperbolični prostor in v model vključili asortativno in disasortativno mešanje igralcev. Ugotovili smo, da oba tipa mešanja zavirata razvoj sodelovanja ne glede na arhitekturo omrežja, a je vpliv disasortativnega mešanja večji v primerjavi z asortativnim mešanjem. Naslednji tip interakcijske mreže, s katerim se še boljše opišemo realne interakcije, so večplastna soodvisna omrežja, ki smo jih v raziskave vključili v naših naslednjih dveh raziskavah. Soodvisnost med dvema omrežjema smo vpeljali s koristnostno funkcijo in pokazali, da lahko parameter pristranskosti učinkovito vpliva na raven sodelovanja. Pokazali smo, da asortativne medmrežne povezave med dvema skalno neodvisnima omrežjema spodbujajo kooperacijo v igri javnih dobrin v nekoliko večji meri kot naključne in disasortativne povezave. V zadnjem sklopu raziskav smo prišli do presenetljivih zaključkov. Rezultati mešanja na dvoplastnem soodvisnem omrežju, kjer posamezna plast predstavlja naključno omrežje, vpeto v hiperbolični prostor, kažejo, da lahko mešanje znotraj posamezne plasti omrežja, kjer je sodelovanje prvotno uspešno, močno oslabi evolucijsko uspešnost kooperatorjev na tej plasti, medtem ko jo za določene vrednosti normaliziranega sinergijskega faktorja spodbuja sodelovanje na drugi plasti omrežja. Rezultati doktorske disertacije predstavljajo pomemben prispevek k znanstvenemu raziskovanju na področju razumevanja razvoja in vzdrževanja sodelovanja, s poudarkom na uporabi evolucijske teorije iger, kompleksnih omrežij in mobilnosti igralcev.Understanding the evolution of cooperation among otherwise selfish individuals is one of the most significant challenges of our time, attracting researchers from various fields. To address this, scientists integrate evolutionary game theory with advanced methods from network science and statistical physics. In the doctoral dissertation, we utilize such an interdisciplinary framework to explore the impact of various player mobilities or mixtures on different interaction networks on the evolution and promotion of cooperation in a public goods game. For this purpose, our research was divided into four sections. In the first part, we showed that introducing mixing of players in public goods games on a regular network facilitates a transition from a system embedded in a spatial network to a state of a well-mixed population, where the structure of the interaction network no longer significantly affects the evolutionary dynamics. Notably, we find that for nearest-neighbor mixing, a higher mixing frequency is required compared to random mixing. Moreover, both types of mixing hinder the evolutionary success of cooperators. Subsequently, our focus shifts to complex networks, effectively capturing essential structural properties of real-world interactions. In the second part of the doctoral dissertation, we thus placed the public goods game on random geometric graphs embedded into hyperbolic spaces and incorporated assortative and disassortative mixing of players into the model. Results indicate that both types of mixing impair the evolution of cooperation regardless of the network architecture. Furthermore, disassortative mixing is more detrimental for cooperation compared with assortative mixing. The next type of interaction networks that closely approximate real interactions are multilayer interdependent networks, which we included in our next two studies. We introduced interdependence between two networks using a utility function and showed that the bias parameter effectively influences the level of cooperation. We demonstrated that assortative linking between two scale-free networks promote cooperation in public goods games with a relatively modest margin in comparison to random and disassortative matching between the two layers. In the last part of our research, we have drawn noteworthy and unexpected conclusions. The outcomes of mixing on a two-layer interdependent network, where each layer represents a random geometric graph in hyperbolic space, reveal that mixing on a network where cooperation is primary successful, impairs the evolutionary success of cooperators on the same network layer. However, for certain values of the normalized synergy factor, it promotes cooperation on the other network layer. The results of the doctoral dissertation constitute a substantial contribution to scientific research in understanding the evolution and maintenance of cooperation, emphasizing the utilization of evolutionary game theory, complex networks, and the mobility of players
Construction of sanitary and stormwater sewer system in the Brda area
No full textV diplomskem delu je predstavljena zasnova in izvedba ločenega kanalizacijskega sistema za naselje Brda, ki vključuje gradnjo komunalne in meteorne kanalizacije. Namen projekta je odprava pomanjkljivosti obstoječega neurejenega stanja, kjer komunalne odpadne vode še vedno odtekajo v greznice, meteorna voda pa se odvaja površinsko ali neposredno v teren. Nova komunalna kanalizacija bo priključena na obstoječi kanalizacijski sistem, povezan s Centralno čistilno napravo Koper, kar bo omogočilo ukinitev greznic in zagotovilo varno ter okolju prijazno odvajanje odpadnih voda.
Meteorna kanalizacija bo prevzemala odvodnjavanje streh objektov in odvajala padavinsko vodo neposredno v vodotok Vrgalovec, s čimer se zmanjšuje možnost zastajanja vode in poškodb površin. Analiza je pokazala, da trenutna rešitev ne vključuje cestnih površin, zato se kot izboljšava predlaga razširitev sistema na te odseke, kar bi še dodatno zmanjšalo vplive večjih padavinskih dogodkov. Predlagani sistem bo pomembno prispeval k izboljšanju komunalne infrastrukture, kakovosti bivanja in prostorskemu razvoju območja Brda.The thesis presents the design and implementation of a separate sewerage system for the settlement of Brda, which includes the construction of sanitary and stormwater sewer networks. The aim of the project is to address the shortcomings of the existing unregulated system, where sanitary wastewater still flows into septic tanks and stormwater is discharged overland or directly into the ground. The new sanitary sewer will be connected to the existing sewerage network linked to the Central Wastewater Treatment Plant Koper, enabling the elimination of septic tanks and ensuring safe and environmentally friendly wastewater disposal.
The stormwater sewer will collect rainwater from building roofs and discharge it directly into the Vrgalovec stream, thereby reducing the risk of water stagnation and surface damage. The analysis showed that the current solution does not include road surfacestherefore, as an improvement, the extension of the system to these sections is proposed, which would further reduce the impacts of major rainfall events. The proposed system will significantly contribute to the improvement of communal infrastructure, quality of life, and spatial development in the Brda area
DONAT MG - FROM THE PAST TO THE PRESENT
Full text linkNamen diplomskega dela je prikazati Donat Mg skozi zgodovino in v sedanjosti, in sicer skozi oči gradbenikov. Za pridobivanje naravne mineralne vode potrebujemo tudi gradbeništvo. Od gradbeništva so odvisne vrtine, izkopi, cevovodi itd.
V diplomskem delu so opisani postopki vrtanja, vodnjaki, izdelavo vodovodnih omrežij, polaganja cevovodov, vzdrževanje le-teh, polnjenje same vode itd.The purpose of the diploma thesis is to show Donat Mg througout history and the present through the eyes of constructors. To obtain natural mineral water we also need civil engineering. It is up to civil engineering to provide boreholes, excavations, pipelines, etc.
The diploma thesis presents the processes of drilling, wells, construction of water distribution networks, pipe laying, their maintenance, bottling of the water itself, etc
SMALL HYDROPOWER PLANT MLAČNIK, FEASIBILITY STUDY
Full text linkDiplomsko delo Mala hidroelektrarna Mlačnik, presoja izvedljivosti je izdelano z namenom in ciljem ugotoviti rentabilnost obnove obstoječe Francisove turbine in možnost pridobivanja električne energije iz vodne energije. Izbira in obdelava te teme nas je pritegnila, ker je na tem mestu dobrih 50 let obratovala žaga, ki jo je poganjala Francisova turbina.
V delu je najprej predstavljeno delovanje dveh malih hidroelektrarn z različnima turbinama, nato pa je analizirana tehnična in ekonomska možnost obnove male hidroelektrarne na potoku Ljubija.The Thesis titled The Small Hydroelectric Plant Mlačnik – Feasibility study was written with the purpose and goal of assessing the cost-effectiveness of refurbishing the existing Francis turbine and producing electricity from the power of flowing water. This particular topic was of interest to us because a sawmill – powered by a Francis turbine – has been operating at this location for over 50 years.
First, the operation of two small hydroelectric plants with different turbines is outlined, and then the technical and economical feasibility of refurbishing a small hydroelectric plant on the Ljubija brook is analysed
HANDLING OVERVIEW OF RENDUNDANT SEWAGE SLUDGE, SAND AND FAT FROM WASTEWATER TREATMENT PLANT
Full text linkOdvečno blato, ki nastaja pri procesu čiščenja odpadnih voda, predstavlja snovni in energetski potencial. Tematika diplomskega dela je izbrana z namenom prepoznati kakšno je nadaljnje ravnanje z odvečnim blatom iz bioloških čistilnih naprav (BČN) v Sloveniji, ter predstaviti nekatere možnosti ravnanja, ki jih ponuja slovensko tržišče.
V diplomskem delu so opisane osnove odpadnih voda in osnove obdelave odvečnega blata. Opisane so nekatere možnosti končne obdelave, predelave in uporabe odvečnega blata. V nadaljevanju so opisani trije primeri nadaljnjega ravnanja z odvečnim blatom v posameznih podjetjih. Končni del diplomskega dela predstavlja kratka raziskava ravnanja z odvečnim blatom, mulji, peski in maščobami.Sewage sludge which is produced as a by-product during wastewater treatment represents a substantial potential as well as potential energy. The present thesis was selected with the purpose to present the further usage of sewage sludge from biological wastewater treatment plant in Slovenia and present some usage possibilities, which are offered by the Slovenian market.
The diploma thesis describes the basics of wastewater and the basics of sewage sludge treatment. It describes some possibilities of final treatment, processing and the usage of sewage sludge. Moreover, three examples of further sewage sludge usage in different companies are described. The final part of diploma thesis presents a brief research of sewage sludge, silt, sand and fat treatment
Sanation of constructed wetland waste water treatment plant Motovilci
Full text linkDiplomsko delo se osredotoča na dejanski primer sanacije rastlinske čistilne naprave v kraju Motovilci. Predstavljen bo nastanek odpadnih vod, njihove značilnosti in čiščenje le-teh. Podrobno bom predstavil tudi delovanje rastlinske čistilne naprave v odvisnosti od toka vode skozi njih ter bolj podrobno horizontalni, vertikalni ter kombinirani sistem podpovršinskega toka vode, ki se nanaša na dejanski primer nadgradnje horizontalnega toka z vertikalnim na rastlinski čistilni napravi Motovilci. V sami sanaciji si bomo ogledali problematiko dosedanjega stanja in rešitve, vezane na kanalizacijsko omrežje, kot tudi samo rastlinsko čistilno napravo. S slikovnim gradivom bomo dodobra prikazali način gradnje grede z vertikalnim tokom, z rezultati prvih meritev pa izsledke sposobnosti sanirane rastlinske čistilne naprave.The diploma focuses on the factual case of remediating the constructed wetland for waste water treatment in Motovilci, Slovenia. The production of waste water, its characteristics and the procedure of purifying it, is the core focus in the presentation. The operation of the constructed wetland is presented independently of the flow of water passing through the treatment facility. The horizontal, vertical and combined subsurface flow system described, refers to the upgrade of the horizontal and vertical system flow of the constructed wetland in question. In the remediation process, the challenges in the current state and the solutions connected to the sewage system are examined along with the entire constructed wetland as a whole. Using visual material, we demonstrate how to construct a vertical flow bed. The results of the initial measurements, the findings of the performance, pre and post the sanation of the constructed wetland are to be presented in the final case study
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