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21.
Potencial lesne biomase za povečanje stopnje samooskrbe z gorivi v Sloveniji
Uroš Kobal, 2016, magistrsko delo

Opis: Energija je ključna dobrina našega obstoja, dela in ustvarjalnosti. Ker smo od nje tako zelo odvisni, ima pomembno vlogo njena varna, zanesljiva in konkurenčna dobava. In ker zaradi današnjih potreb ne želimo spodkopavati razvoja in okoljskih potreb zdajšnje in bodočih generacij, moramo energijo pridobivati v skladu s smernicami trajnostnega razvoja. Trenutno je velik del sveta odvisen od dobav fosilnih goriv, ki ne izpolnjujejo teh smernic. Države članice EU so si zato postavile ambiciozne cilje za povečanje rabe obnovljivih virov energije, ki bi to stanje izboljšali. Glede na to, da gozdovi pokrivajo 58,3% površine Slovenije, ima energija lesne biomase tu velik potencial. V magistrskem delu je na podlagi podatkov iz statističnih baz ocenjeno, da je vsako leto za energetsko izrabo na voljo čez 2.400.000 ton zračno suhe lesne biomase. Preko 1.600.000 ton se je že sedaj porabi v energetske namene, preostali del pa ostane neizkoriščen. Iz nje je mogoče preko enostavnejših ali bolj kompleksnih postopkov priti do trdnih, tekočih ali plinastih biogoriv, ki so uporabna v sektorju prometa in v proizvodnji električne energije ali toplote. Tehnologije, ki so poleg oksidacije trdnih lesnih goriv v nalogi predstavljene, so uplinjanje lesne biomase, soproizvodnja toplote in električne energije, proizvodnja vodika in bio zemeljskega plina, proizvodnja tekočih biogoriv s Fischer-Tropschevo sintezo, utekočinjanje lesa in depolimerizacija biomase z nadaljnjo sintezo tekočih biogoriv. Ocenjeno je, da bi lahko z implementacijo teh postopkov in uporabo domače lesne biomase na ravni države privarčevali preko 128 milijonov evrov letno, zmanjšali emisije CO2 v ozračje za skoraj 718.000 ton ter v kombinaciji z dobro delujočo lesno industrijo ustvarili 30.000 novih delovnih mest.
Ključne besede: Lesna biomasa, potencial lesne biomase, obnovljivi viri energije, biogoriva, uplinjanje biomase, utekočinjanje lesne biomase, soproizvodnja toplote in električne energije
Objavljeno: 06.12.2016; Ogledov: 857; Prenosov: 52
.pdf Polno besedilo (1,87 MB)

22.
Izbira hidravličnega cepilnika drv z večparametrskim vrednotenjem in finančno analizo
Jernej Ušaj, 2016, magistrsko delo

Opis: Magistrsko delo obravnava izbiro hidravličnega cepilnika drv z uporabo večparametrskega vrednotenja in finančne analize. Za ogrevanje hiše uporabljamo drva, ki jih samostojno pripravljamo in ročno cepimo s pomočjo cepilne sekire. Cepljenje zahteva veliko fizične moči in časa, zato želimo investirati v hidravlični cepilnik drv. V magistrskem delu smo želeli odgovoriti na vprašanja, ali je smiselno izdelati cepilnik doma ali ga raje kupiti ter kakšnega in katerega naj izberemo v primeru nakupa. Hidravlične cepilnike drv smo razdelili na skupino cepilnikov na tritočkovni priklop in skupino mobilnih cepilnikov. Izbrali smo deset najprimernejših cepilnikov drv in jih podrobno analizirali. Z uporabo večparametrske metode DEX in računalniškega orodja DEXi smo izdelali večparametrska odločitvena modela za vrednotenje obeh skupin cepilnikov drv. Največjo težo v modelu in samem vrednotenju so imeli sledeči kriteriji: cena cepilnika, cepilne karakteristike, lastnosti cilindra in konstrukcijske lastnosti. Rezultate vrednotenja cepilnikov drv smo med seboj primerjali in podali sklepne ugotovitve. Kot najprimernejši in najmanj tvegan nakup sta se izkazala cepilnika LANCMAN ST 17C na tritočkovni priklop in mobilni cepilnik LANCMAN STAW 17. Zaradi boljših konstrukcijskih lastnosti in nižje cene smo se odločili za prvega. Izdelali smo tudi več finančnih analiz za ugotovitev upravičenosti in smiselnosti investicije v hidravlični cepilnik drv. Primerjali smo stroške samostojne izdelave cepilnika drv, nakupa izbranega hidravličnega cepilnika drv in najema mobilnega cepilnika. Kratkoročno je najprimernejša izbira najem cepilnika, dolgoročno pa zaradi nižje cene samostojna izdelava cepilnika.
Ključne besede: ogrevanje prostorov, hidravlični cepilnik drv, večparametrsko odločanje, večprarametrsko modeliranje, računalniški program DEXi, vrednotenje variant, finančna analiza
Objavljeno: 06.12.2016; Ogledov: 936; Prenosov: 59
.pdf Polno besedilo (2,58 MB)

23.
Vrednotenje in izbira tehnoloških rešitev za proizvodnjo statorjev
Primož Pahor, 2016, magistrsko delo

Opis: Magistrska naloga obravnava vrednotenje in izbiro tehnoloških rešitev za izdelavo statorjev elektromotorja. Izbrano podjetje, s katerim smo sodelovali pri izdelavi magistrske naloge, se vse pogosteje sooča z izbiro tehnoloških rešitev za izdelavo elektromotorjev in njihovih podsestavov. Zato smo se odločili za snovanje odločitvenega modela, ki bo omogočal hitro in enostavno vrednotenje tehnoloških rešitev za izdelavo statorjev. V magistrski nalogi smo predstavili razvoj in delovanje odločitvenih modelov po kombinirani odločitveni metodi utežene vsote in odločitvenih dreves ter odločitveni metodi DEX. V nadaljavanju smo analizirali alternative, odločitvene modele in rezultate primerjali in ugotavljali njihovo skladnost. Odločitveni modeli po obeh metodah pomagajo ovrednotiti najboljšo tehnološko rešitev na nivoju dobavitelja tehnološke rešitve za izdelavo statorjev. V modelu, izdelanem po kombinirani metodi utežene vsote in odločitvenih dreves, smo upoštevali tudi verjetnost pojavitve napovedanih proizvodnih količin, s čimer smo poskusili izbiro še dodatno izboljšati in čim bolj zmanjšati odločitveno tveganje. Zaradi kompleksnosti odločitvenega problema smo odločanje pri obeh odločitvenih modelih razdelili na dve stopnji in tako dosegli boljšo strukturiranost in preglednost odločitvenega postopka. Iz obeh odločitvenih modelov smo dobili enako razvrstitev izbranih alternativ in tako ugotovili, da sta modela primerljiva. Najbolje ovrednoteni dobavitelj strojne opreme je z Japonske in se tudi v realnosti izkazuje kot najboljši izmed treh ponudnikov strojne opreme za izdelavo statorjev elektromotorjev. Iz tega lahko sklepamo, da sta odločitvena modela pravilna in primerna za realizacijo v praksi.
Ključne besede: elektromotor, stator, tehnologija proizvodnje, odločitveni model, vrednotenje, odločitvena metoda DEX, odločitvena metoda utežene vsote, metoda odločitvenih dreves
Objavljeno: 24.11.2016; Ogledov: 785; Prenosov: 52
.pdf Polno besedilo (2,25 MB)

24.
Brand introduction on the Slovenian market: case study Gurieli tea
Mariam Parekhelashvili, 2016, magistrsko delo

Opis: Human beings have always tried to create new, innovative things so as to gain profit out of them. Companies which are following the human beings nature strive to satisfy customers’ demand for high-quality products and services. Developing a new product is always a complex and experimental process. The process of introducing new products to an international market is as risky as it is vital for the long-term success of many companies. The number of new products introduced globally is increasing every year, but great majority of them fail. The main purpose of this thesis is to develop an effective marketing plan for the new product introduction to an international market - a successful launch of the Georgian Gurieli tea to the Slovenian market. Market research gave us a business view of the tea industry on the Slovenian market. By means of secondary research and market analysis, we identified potential customers, understood market conditions and competitive landscape. The main steps of proposed marketing strategy are segmentation, targeting and successful positioning (STP). STP focuses on commercial effectiveness, selecting the most valuable segments of the Slovenian market and developing the marketing mix and product positioning strategy for each recognized segment. Planned implementation of a subtle advertising campaign for the Gurieli tea would be a vital component of the strategy - through an innovative marketing communication mix the product would be successfully introduced and promoted to target customers.
Ključne besede: Product development, tea, brand introduction, segmentation, targeting, positioning, market research, international market, marketing mix, communication.
Objavljeno: 07.10.2016; Ogledov: 1209; Prenosov: 46
.pdf Polno besedilo (1,88 MB)

25.
THE ROLE OF SPECT/CT SCINTIGRAPHY IN LOCALIZATION OF PARATHYROID ADENOMAS
Sebastijan Rep, 2016, magistrsko delo

Opis: Parathyroid scintigraphy is based on the different accumulation and distribution of radiopharmaceutical 99mTc-MIBI (MIBI) in parathyroid and adjacent tissues. Different scintigraphic techniques can be used: subtraction scintigraphy is a combination of MIBI and 99mTc-pertehnetate (pertehnetate) scintigraphy; SPECT can be performed after intravenous injection of MIBI or in the combination with low-dose computerized tomography (SPECT/CT) which allows precise anatomical localization of enlarged parathyroid glands (EPG). The objectives of our study were: to assess diagnostic performance of preoperative localization of EPG (adenomas and hyperplasia) of the early, delayed and combined SPECT/CT and of subtraction scintigraphy in patients with biochemically proven primary hyperparathyroidism (PHP); to determine whether size of EPG, serum parathyroid hormone (PTH), calcium (Ca) and phosphate (P) correlate with successful localization; to assess radiation exposure of patients with early and late SPECT/CT and subtraction scintigraphy The study included 41 patients in whom early, delay SPECT/CT and subtraction scintigraphy were performed. For all scintigraphic methods sensitivity, specificity, positive predictive value, negative predictive value and accuracy were calculated. Receiver Operating Characteristic analysis was used to express relationship between scintigraphy results and size of the EPG and serum Ca, P and PTH levels. ImPACT CT Patient Dosimetry Calculator and weighting factors for radiopharmaceuticals (MIBI and pertechnetate) were used for calculating patient expose dose. Sensitivity and specificity were 51.1% and 98.3 for subtraction scintigraphy, 65.1% and 97.5% for early SPECT/CT and 65.1% and 95.5% for delay SPECT/CT. In combined early and delay SPECT/CT sensitivity and specificity were 74.4% and 95.1%.Only size of the EPG correlated with successful localization in our study (AUC of 0.791-0.810). The highest average ED per patient had subtraction scintigraphy (7.37±0.40 mSv), which was statistically significant higher in comparison to combined early and delayed SPECT/CT (6.81±0.44 mSv). The most sensitive and most accurate method of preoperative localization of EPG in patients with PHP is combined early and delayed SPECT/CT. Only size of the EPG correlates with successful localization. The highest radiation exposure is after subtraction scintigraphy.
Ključne besede: Enlarged parathyroid glands, early SPECT/CT, delayed SPECT/CT, combined SPECT/CT, subtraction scintigraphy, 99mTc-MIBI, 99mTc-pertechnetate, effective dose, serum parathyroid hormone, calcium, phosphate
Objavljeno: 03.10.2016; Ogledov: 1181; Prenosov: 48
.pdf Polno besedilo (1,03 MB)

26.
ASSESSMENT OF THE DEVELOPMENT POTENTIAL OF FOREST-WOOD PROCESSING CHAIN
Slavica Ilc, 2016, magistrsko delo

Opis: Slovenia is the third most forested country in Europe. Nevertheless, in the last twenty five years this natural wealth did not get the adequate role in national development strategies, which unnecessary reduced their sustainability potential and lead the Slovenian forest-wood industry in a very bad situation. The forest-based sector in Europe is in a period of profound structural changes, which requires reassessment of the wood-chain products outlook. In the master’s thesis, the importance of integration of forestry and wood industry has been evaluated with the meaningful connection of different analytical methods: material flow analysis (MFA), SWOT analysis and life cycle assessment (LCA). With comparison of the roundwood and sawnwood material flow in Slovenia, Italy and Austria, the critical points in the Slovenian forest-wood chain were identified. In contrast to Austria and Italy, where wood is intensively reworked, Slovenia exports large amounts of untreated roundwood. As a consequence, the gross value added (GVA) per employee of wood sector in Slovenia reaches only 40 % of GVA in Austria and 50 % of GVA in Italy. Not only MFA, but also the SWOT and LCA analyses show, that wood processing into finished products is important both in terms of the value added and the environmental impact, as well as for more decisive shift of the economy towards a low-carbon society. Slovenian economy could take advantage of its sustainable development potential to a great extent by increasing the level of raw material self-sufficiency and energy independency. It is essential to re-establish forest-wood processing chain, to rework wood at home into products with the highest added value, and to use wood residues as renewable feedstock in green chemistry industry and for transformation into energy with novel technologies. Slovenian vision of sustainable economy has great potential, but requires enhanced cross-sectoral integration of forestry, wood processing, construction, chemistry and energy.
Ključne besede: sustainability, forest-wood processing chain, development potential, material flow analysis (MFA), SWOT analysis, life cycle assessment (LCA)
Objavljeno: 30.09.2016; Ogledov: 1146; Prenosov: 58
.pdf Polno besedilo (1,77 MB)

27.
PREVENTION AND MANAGEMENT OF LEGIONELLA SPP. SPREAD IN HOSPITAL WATER SYSTEM (ESTABLISHING AN EFFECTIVE SYSTEM WITHOUT USING CHEMICALS IN UNIVERSITY CLINIC OF RESPIRATORY AND ALLERGIC DISEASES GOLNIK)
Mojca Novak, 2016, magistrsko delo

Opis: The hospital water system can be a causative agent for acquiring hospital-acquired infection. Many microorganisms can be detected in potable water and one of this is Legionella spp. These bacteria live also in nature, but are usually present in low numbers. When entering into the buildings and their water supply, Legionella finds ideal conditions to multiply, especially if this systems are extensive and old. To control the conditions in the levels that cannot harm humans, many procedures – physical and chemical – have been established. All of them have advantages as well as limitations. According to these facts, in University Clinic of Respiratory and Allergic Diseases Golnik we tried to reestablish the protocols that would keep us on the safe side and be environmentally and health friendly as well. We have been trying to use the protocol without added chemicals – just with maintaining proper temperatures, heat disinfection and flushing for many years now. With this study we wanted to extend our knowledge of our hospital water system, so we intensified the sampling and introduced extended measures. We found out that the presence of Legionella in water system is connected to moderate temperatures and it is present more frequently in high risk zones (inappropriate temperatures, dead legs, water stagnation). With constant measures, the Legionella can be controlled but not eradicated. To contain it on a safe level, the group of experts must work together and introduce procedures that will provide safe environment for the patients and employees.
Ključne besede: Legionella spp., hospital water system, prevention, temperature, flushing.
Objavljeno: 30.09.2016; Ogledov: 831; Prenosov: 62
.pdf Polno besedilo (2,81 MB)

28.
ASSESSMENT OF EFFECTIVE DOSES BASED ON VARIOUS RADON MEASURING TECHNIQUES
Nataša Smrekar, 2016, magistrsko delo

Opis: In my master's thesis, I have focused on radon gas in 43 buildings used for different purposes (23 schools, 3 kindergartens, 16 offices and a residential house) in which preliminary measurements had shown higher concentrations of radon gas. I carried out measurements of radon and short-lived radon products whilst simultaneously employing different measurement techniques. In all 43 buildings, I measured the instantaneous concentration of radon by using scintillation cells; in 18 buildings, I additionally measured the average concentration of radon by using solid state nuclear track detectors and in 10 buildings, I measured concentration retrospectively with solid state nuclear track detectors. In four selected buildings (a school, a kindergarten, an office and a residential house), I carried out the measurements by using all of the available equipment. I monitored the daily fluctuations of concentration of radon and short-lived radon products by using continuous monitors in 14 buildings. This is how I obtained the factor of radioactive equilibrium between radon and its short-lived products. Based on the results obtained, I calculated the effective doses. As the basis for calculating the doses, I used the instantaneous and average concentrations of radon and the equilibrium factor taken from literature (0.40) or own measurements. I compared the doses and critically evaluated them. In contrast to the previous research, I researched radon exclusively in areas with increased risk for radon. I studied the influence of the working regime on the concentration of radon in different working environments (i.e. a school, a kindergarten and an office).
Ključne besede: Radon, short-lived radon products, measurement technique, scintillation cell, solid-state nuclear track detector, retrospective detector, equilibrium factor, effective dose, comparison.
Objavljeno: 28.09.2016; Ogledov: 934; Prenosov: 76
.pdf Polno besedilo (1,86 MB)

29.
Poetični jezik in ponavljanje
Mojca Pretnar, 2016, magistrsko delo

Opis: Delo Poetični jezik in ponavljanje se loteva razmerja med poetičnim jezikom in navadnim jezikom skozi psihoanalitične koncepte. Poetični jezik, kakor ga vidi psihoanaliza, je neločljivi del jezika in temelji na prepletu Lacanovih treh registrov: simbolnega, imaginarnega in realnega - tudi poetični jezik strukturo boromejskega vozla. Poetični jezik, ki ga najdemo v poetičnih besedilih, v primerjavi z navadnim jezikom pomeni spremembo v kodu, ustvarja kršitve in se od navadnega jezika loči po večjem deležu realnega, ki proizvaja različne učinke, zaradi katerih posegamo po poetičnih besedilih. Jezik se konstituira skozi ponavljanje in ponavljanje je moč jezika. Ponavljanje je vse prej kot zaviralna sila, ravno ponavljanje ponuja možnost, da se ustvarja novo. Pretresanje poetičnega jezika skozi dva različna koncepta ponavljanja, ponavljanje, kakor ga vidita Lacanova psihoanaliza in Deleuzova filozofija, potrdi, da se poetični jezik konstituira skozi vse plati ponavljanja. Če poetični jezik proizvaja realne učinke in stvori umetniško poetično besedilo, sestoji iz ponavljanja v vseh treh registrih po Lacanovi tipologiji ali mora biti sklop vseh treh sintez po Deleuzovi tipologiji. To vednost mora v zakup vzeti tudi prevajanje poetičnih besedil, ki je tudi en primer ponavljanja.
Ključne besede: poetični jezik, jejezik, boromejski vozel, ponavljanje v psihoanalizi, Deleuzov koncept ponavljanja, objekt a, literarno prevajanje
Objavljeno: 28.09.2016; Ogledov: 829; Prenosov: 55
.pdf Polno besedilo (1,03 MB)

30.
Subverzivni elementi v (mladinskih) besedilih Andreja Rozmana Roze
Špela Brajer, 2016, magistrsko delo

Opis: V magistrkem delu kratko opredelim recepcijo mladinske književnosti v luči subverzije. Predstavim teorijo srednjeveške smehovne kulture in opišem njene elemente (karneval, parodija, jezik) ter pokažem, kako se subverzija navezuje na teorijo srednjeveške smehovne kulture, še posebej karnevala. V drugem, obsežnejšem delu magistrskega dela predstavim opus Andreja Rozmana Roze. V nadaljevanju s formalno in motivno-tematsko analizo ter interpretacijo prikažem, kako se elementi subverzije kažejo v vsaki skupini besedil posebej (otroška in mladinska besedila ter besedila za odrasle). Vsakega od treh elementov subverzije podrobneje razčlenim: pretiravanje, groteskno opisovanje telesa, karnevalski smeh (praznični in ambivalentni smeh ter ironijo), groteskni realizem ter obredne dogodke in utopijo. Dodam jim še jezikovne prvine, kot so frazemi, uporabo ljubkovalnic, olepševalnic, kletvic, zmerljivk ipd. Poleg tega analiziram poliglosijo in heteroglosijo ter neologizme, blizuzvočnice in oksimoron. Kot tretji element subverzije teoretiki navajajo parodijo, ki pa jo analiziram na nivoju celotnega besedila. Izsledke analize besedil interpretiram tako, da pokažem, kako se elementi pojavljajo skozi različne zvrsti in glede na tematiko.
Ključne besede: subverzija, subverzivni elementi, Andrej Rozman Roza, karneval, smehovna kultura
Objavljeno: 28.09.2016; Ogledov: 773; Prenosov: 52
.pdf Polno besedilo (585,47 KB)

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