Relevant bibliographies by topics / Prehľad

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Prehľad'

Author: Grafiati
Published: 28 June 2021
Last updated: 2 February 2022

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Journal articles on the topic "Prehľad"

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Kačalová, Katarína, and Katarína Žiaková. "The issue of documenting pressure ulcers: literary review." Kontakt 21, no. 3 (September 18, 2019): 254–62. http://dx.doi.org/10.32725/kont.2019.034.

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ŠTURDÍK, E., and R. KOLÁR. "Total fractionation of yeast. I. Literature review." Kvasny Prumysl 34, no. 4 (April 1, 1988): 107–10. http://dx.doi.org/10.18832/kp1988017.

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Hajnalová Buvalová, Ľubica. "Overview of research students study ethics." e-Pedagogium 14, no. 1 (February 1, 2014): 56–67. http://dx.doi.org/10.5507/epd.2014.005.

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Sotak, Štefan. "Acute kidney injury: a current comprehensive overview." Vnitřní lékařství 63, no. 2 (February 1, 2017): 93–97. http://dx.doi.org/10.36290/vnl.2017.020.

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Kollerová, Jana, Ján Malina, Andrej Šteňo, Pavol Povinec, and Juraj Payer. "Cyclic Cushing's syndrome: a case study and overview." Vnitřní lékařství 64, no. 4 (April 1, 2018): 450–56. http://dx.doi.org/10.36290/vnl.2018.064.

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Dudáš, Tomáš. "THE CRITICAL REVIEW OF DEVELOPMENT THEORIES OF FOREIGN DIRECT INVESTMENT." Acta academica karviniensia 14, no. 3 (September 30, 2014): 30–38. http://dx.doi.org/10.25142/aak.2014.045.

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Szántová, Mária, Jozef Sedlačko, and Martina Jakabovičová. "Drug and herbal hepatotoxicity: an overview of clinical classifications." Vnitřní lékařství 64, no. 4 (April 1, 2018): 384–93. http://dx.doi.org/10.36290/vnl.2018.057.

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Nehaj, František, Marianna Kubašková, Michal Mokáň, Juraj Sokol, Vladimír Nosáľ, Kamil Zeleňák, and Marián Mokáň. "Unusual history of Wilson disease: a case report and review of the literature." Vnitřní lékařství 63, no. 12 (December 1, 2017): 980–86. http://dx.doi.org/10.36290/vnl.2017.178.

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Tonková, Mária. "Prehľad využitia progresívnych metód v historickej antropológii v podmienkach Slovenska." Studia Historica Nitriensia 20, no. 1 (June 30, 2016): 282–89. http://dx.doi.org/10.17846/shn.2016.20.1.282-289.

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Zouhar, Jakub. "The Survey of Church Historiography in the Czech Republic in the New Millennium." Konštantínove listy/Constantine's Letters 7, no. 1 (June 30, 2014): 73–89. http://dx.doi.org/10.17846/cl.2014.7.1.73-89.

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Dissertations / Theses on the topic "Prehľad"

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Zembjaková, Martina. "Prieskum a taxonómia sieťových forenzných nástrojov." Master's thesis, Vysoké učení technické v Brně. Fakulta informačních technologií, 2021. http://www.nusl.cz/ntk/nusl-445488.

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Táto diplomová práca sa zaoberá prieskumom a taxonómiou sieťových forenzných nástrojov. Popisuje základné informácie o sieťovej forenznej analýze, vrátane procesných modelov, techník a zdrojov dát používaných pri forenznej analýze. Ďalej práca obsahuje prieskum existujúcich taxonómií sieťových forenzných nástrojov vrátane ich porovnania, na ktorý naväzuje prieskum sieťových forenzných nástrojov. Diskutované sieťové nástroje obsahujú okrem nástrojov spomenutých v prieskume taxonómií aj niektoré ďalšie sieťové nástroje. Následne sú v práci detailne popísané a porovnané datasety, ktoré sú podkladom pre analýzu jednotlivými sieťovými nástrojmi. Podľa získaných informácií z vykonaných prieskumov sú navrhnuté časté prípady použitia a nástroje sú demonštrované v rámci popisu jednotlivých prípadov použitia. Na demonštrovanie nástrojov sú okrem verejne dostupných datasetov použité aj novo vytvorené datasety, ktoré sú detailne popísane vo vlastnej kapitole. Na základe získaných informácií je navrhnutá nová taxonómia, ktorá je založená na prípadoch použitia nástrojov na rozdiel od ostatných taxonómií založených na NFAT a NSM nástrojoch, uživateľskom rozhraní, zachytávaní dát, analýze, či type forenznej analýzy.
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Downey, Imelda Louise. "Fouling of crude oil refinery preheat exchangers." Thesis, University of Bath, 1993. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.760645.

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Ishiyama, Edward Masato. "Modelling crude oil preheat networks subject to fouling." Thesis, University of Cambridge, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.611842.

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Håkansson, Kenneth. "Weld Metal Properties for Extra High Strength Steels." Doctoral thesis, KTH, Production Engineering, 2002. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-3403.

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Kochar, Yash N. "Laminar flame speed and stretch sensitivity of hydrocarbon fuels at high preheat, pressure and vitiation." Diss., Georgia Institute of Technology, 2014. http://hdl.handle.net/1853/52216.

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This thesis investigates the laminar flame speed of C₁-C₃ alkanes and their binary mixtures at conditions of interest in natural gas based gas turbines viz. high temperature, pressure and dilution. Laminar flame speed has been found useful not only for validating chemical kinetics mechanisms but also for developing empirical scaling laws for practical combustion systems. The thesis addresses the lack of laminar flame speed data of C₁-C₃ alkanes at preheat (300-650 K), pressure (1-10 atm) and significant oxidizer dilution (15-21 vol% O₂). Over 400 measurements are reported over a wide range of conditions along with comparison to predictions from leading chemical mechanisms. Unstretched flame speed measurements were performed using a modified Bunsen flame technique based on reaction zone area from chemiluminescence imaging, whereas the strain sensitivity measurements were performed using a bluff-body stabilized stagnation flame with high resolution PIV. These measurements are used to: (i) discern the uncertainties associated with the measurements, (ii) understand the effect of fuel mixture and vitiation on flame speed, and (iii) validate the performance of the leading chemical kinetics mechanisms. Extensive testing shows the unstretched flame speed measurements from the modified Bunsen technique are reasonably accurate. Vitiation studies for methane and propane flames at high preheat show the reduction in flame speed results primarily from the thermal effect of the diluent and that the relative change in flame speed from the undiluted mixture is well correlated to the fractional change in the adiabatic flame temperature over a range of conditions. Significant difference in the measured and predicted flame speeds were observed for rich, atmospheric pressure, propane and lean, high pressure, methane/ethane mixtures with dilution. This highlights possible avenues for improvements in the chemical kinetics mechanisms. Systematic errors were also identified in the Bunsen flame measurements at certain conditions, such as for rich flames with dilution, indicating a need for better understanding of the Bunsen flame technique at these conditions. The difference in the measured and predicted flame speed does not show any clear correlation with the flame height or the strain sensitivity of the mixture. Finally previously proposed mixing rules for estimating flame speed of fuel mixtures from pure fuel components are shown to be reasonably accurate over a range of pressure, reactant temperature and dilution conditions.
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Wu, Yi. "Experimental investigation of laminar flame speeds of kerosene fuel and second generation biofuels in elevated conditions of pressure and preheat temperature." Thesis, Rouen, INSA, 2016. http://www.theses.fr/2016ISAM0011/document.

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La vitesse de flamme laminaire représente une grandeur physique clé à mesurer car elle permet d'obtenir des données fondamentales sur la réactivité, la diffusivité et l'exothermicité du carburant. Elle est également un des paramètres utilisés pour le développement et la validation des mécanismes réactionnels détaillés ainsi que pour la modélisation de la combustion turbulente. Bien que cette grandeur physique ait fait l'objet de nombreuses études expérimentales depuis plusieurs décennies, sa méconnaissance sur des carburants multi-composant dans des conditions haute-pression et haute-température similaires à celles existantes dans les chambres de combustion reste un sujet d'actualité pour les industriels des secteurs automobile et aéronautique. Au cours de cette thèse, un brûleur de configuration bec Bunsen fonctionnant avec un prémélange gazeux combustible/air a été conçu pour produire une flamme laminaire à pression élevée tout en permettant la mesure par voie optique de la vitesse de flamme laminaire de carburants multi-composant (kérosène, biocarburants de seconde génération...). La mesure est basée sur la détection du contour de flamme par diverses diagnostics optiques comme la chimiluminescence OH*, la PLIF-OH et la PLIF-acétone/aromatique. En premier lieu, les mélanges de carburants purs gazeux (CH4) ou liquide (acétone) avec de l'air ont été étudiés pour valider le brûleur expérimental et la méthodologie de mesure de la vitesse de flamme laminaire par voie optique. Les évolutions de la vitesse de flamme laminaire pour des carburants de type kérosène (composants purs, surrogate LUCHE et Jet A-1) en fonction de la pression, température de préchauffage et richesse ont été ensuite étudiées et comparées avec des simulations numériques utilisant un mécanisme réactionnel détaillé. La dernière partie de la thèse est consacrée à l'étude de l'influence des composés oxygénés présents dans un biocarburant de seconde génération de type d'essence sur la vitesse de flamme laminaire. Après avoir mesuré la vitesse de flamme laminaire de différentes molécules oxygénées, les effets d'addition de ces composés oxygénés dans le carburant ont été quantifiés
Laminar flame speed is one of the key parameters for understanding reactivity, diffusivity and exothermicity of fuels. It is also useful to validate both the kinetic chemical mechanisms as well as turbulent models. Although laminar flame speeds of many types of fuels have been investigated over many decades using various combustion methodologies, accurate measurements of laminar flame speeds of multicomponent liquid fuels in high-pressure and high-temperature conditions similar to the operating conditions encountered in aircraft/automobile combustion engines are still required. In this current study, a high-pressure combustion chamber was specifically developed to measure the laminar flame speed of multicomponent liquid fuels such as kerosene and second generation of biofuels. The architecture of the burner is based on a preheated premixed Bunsen flame burner operated in elevated pressure and temperature conditions. The optical diagnostics used to measure the laminar flame speed are based on the detection of the flame contour by using OH* chemiluminescence, OH- and acetone/aromatic- Planar laser induced fluorescence (PLIF). The laminar flame speed of gaseous CH4/air and acetone/air premixed laminar flames were first measured for validating the experimental setup and the measurement methodologies. Then, the laminar flame speeds of kerosene or surrogate fuels (neat kerosene compounds, LUCHE surrogate kerosene and Jet A-1) were investigated and compared with simulation results using detailed kinetic mechanisms over a large range of conditions including pressure, temperature and equivalence ratio. The last part of the thesis was devoted to study the effect of oxygenated compounds contained in the second generation of biofuels on the laminar flame speeds. After measuring the laminar flame speeds of various oxygenated components present in partially hydro-processed lignocellulosic biomass pyrolysis oils, the effect of these oxygenates on the flame speeds of these fuels were quantitatively investigated
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Vlach, Jan. "Vliv svařovacích parametrů na kvalitu a mechanické vlastnosti svarového spoje." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2019. http://www.nusl.cz/ntk/nusl-402552.

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The Master´s thesis focuses on the possibilities of using MAG welding on carbon steel 1.1221(C60E) without using preheating. It researches the effect of basic welding parameters on the final characteristics with the goal being to find a welding seam without defects, without using preheating.
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Nöbauer, Henrik. "En utvärdering av metoder för att bestämma den förhöjda arbetstemperaturen vid svetsning av S355J2." Thesis, Karlstads universitet, Fakulteten för hälsa, natur- och teknikvetenskap (from 2013), 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-36702.

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En vanlig orsak till brott i svetsade kolstålskonstruktioner kan härledas till små sprickbildningar som uppstår i svetsgodset eller det område av grundmaterialet som har påverkats strukturellt av energin från svetsprocessen, även kallad HAZ. Dessa sprickor uppstår ofta timmar eller dagar efter avslutad svetsning och beror på en kombination av väte, en hård och spröd mikrostruktur och närvaro av spänningar. För att undvika dessa sprickor kan man förvärma materialet innan svetsning. Den förhöjda arbetstemperaturen ger en långsammare svalning vilken minskar risken för martensitbildning och låter väte diffundera ut från svetsförbandets kritiska delar. Det finns olika beräkningsmodeller för att räkna ut den förvärmningstemperatur som krävs för att motverka dessa sprickor. De flesta av dem är grafiska men försök har gjorts att översätta dessa till matematiska algoritmer. Beräkningsmodellerna kan ge väldigt varierande temperaturer och olika modeller kan anses vara bäst tillämpade till olika stål. I denna rapport har det undersökts vilken beräkningsmodell som är bäst lämpad för konstruktionsstålet S355J2. Modellerna som har använts är den matematiska CET, de grafiska CEIIW och CEN samt matematiska tolkningar av de två sistnämnda. Utvärderingen har gjorts genom att svetsa upp prover på plåtar med en godstjocklek på 30 mm med en stegvis ökande förhöjd arbetstemperatur. Dessa prover har sedan genomgått både oförstörande och förstörande provning för att undersöka hur sprickbenägna de är. En analys av svetsförbandets mikrostruktur har också genomförts för att identifiera de mest kritiska zonerna. Det visade sig att de matematiska tolkningarna av de grafiska metoderna skiljde sig såpass mycket från sina grafiska motsvarigheter att de inte kan rekommenderas för användning. Det visade sig även att det inte fanns en beräkningsmodell av ursprungsmodellerna som var bäst lämpad för S355J2 utan valet berodde helt och hållet på vilken sträckenergi som användes då modellerna tar olika mycket hänsyn till denna. För en sträckenergi på över 1,6 kJ/mm rekommenderas CET-metoden som beräknade en temperatur som gav goda materialparametrar. För sträckenergier under 0,9 kJ/mm beräknar ingen metod en tillräckligt hög temperatur, men CEIIW är den som beräknar den högsta förhöjda arbetstemperaturen och rekommenderas därför för användning. Man bör dock ha i åtanke att den inte var tillräckligt hög och bör därför ses som en lågt räknad rekommendation. Mellan 0,9 kJ/mm och 1,6 kJ/mm har inga prover svetsats men rekommendationen är att använda sig av CET-metoden då den är enkel och beräknar högst temperatur. Vad det gäller svetsförbandets kritiska zoner så visade det sig att korntillväxtzonen var området där vätesprickor har störst förutsättningar för att uppstå.
One of the most common causes of failure in welded carbon steel constructions can be traced to small cracks that occur in the weld metal or in the area of the base metal that has been affected structurally by the energy from the welding process, also known as HAZ. These cracks can occur hours or days after the welding is completed and do so due to a combination of hydrogen that has penetrated the metal during the weld process, a hard and brittle microstructure and tensile stresses acting on the weld. A method to avoid these cracks is to preheat the material before welding. The increased temperature results in a slower cooling which reduces the risk of a martensitic microstructure and allow hydrogen to diffuse out of the most critical zones of the welded joint. There are many different methods for calculating the preheat temperature needed to counter these cracks. Most of them are solved graphically but attempts have been made to translate them into mathematical algorithms to facilitate calculations. The outcome of the methods may vary and different methods can be considered to be best applied to various steel. The purpose of this study is to investigate which method is best suited to determine the preheat temperature to eliminate the risk of hydrogen cracking for the structural steel S355J2. The methods used in this study was the mathematical CET, the graphic CEIIW and CEN and mathematical interpretations of the latter two. The evaluation was made by welding samples of plates with a thickness of 30 mm and with an incrementally increased preheat temperature. These samples were then subjected to both non-destructive and destructive testing to examine how prone they were to crack. An analysis of the weld microstructure was also conducted to identify the most critical zones. It turned out that the mathematical interpretations of the graphic methods differed so much from their graphical equivalent that they can not be recommended for use. It was also found that none of the original methods can be said to be best suited for S355J2 but the choice depended entirely on the heat input. For a heat input over 1.6 kJ/mm it is recommended to use the CET-method which estimated a temperature that gave good material parameters. For a heat input below 0.9 kJ/mm no method calculates a sufficiently high temperature, but the CEIIW-method is calculating the highest temperature and is therefore recommended for use. However, one should keep in mind that it was not sufficient and should therefore be seen as a conservative recommendation. No samples were welded between 0.9 kJ/mm and 1.6 kJ/mm but the recommendation is to use the CET- method because it is simple and calculates the maximum temperature. It was also found that the coarse grain zone was the area where hydrogen cracking is most likely to occur.
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Natarajan, Jayaprakash. "Experimental and numerical investigation of laminar flame speeds of H₂/CO/CO₂/N₂ mixtures." Diss., Georgia Institute of Technology, 2008. http://hdl.handle.net/1853/22685.

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Coal derived synthetic gas (syngas) fuel is a promising solution for today s increasing demand for clean and reliable power. Syngas fuels are primarily mixtures of H2 and CO, often with large amounts of diluents such as N2, CO2, and H2O. The specific composition depends upon the fuel source and gasification technique. This requires gas turbine designers to develop fuel flexible combustors capable of operating with high conversion efficiency while maintaining low emissions for a wide range of syngas fuel mixtures. Design tools often used in combustor development require data on various fundamental gas combustion properties. For example, laminar flame speed is often an input as it has a significant impact upon the size and static stability of the combustor. Moreover it serves as a good validation parameter for leading kinetic models used for detailed combustion simulations. Thus the primary objective of this thesis is measurement of laminar flame speeds of syngas fuel mixtures at conditions relevant to ground-power gas turbines. To accomplish this goal, two flame speed measurement approaches were developed: a Bunsen flame approach modified to use the reaction zone area in order to reduce the influence of flame curvature on the measured flame speed and a stagnation flame approach employing a rounded bluff body. The modified Bunsen flame approach was validated against stretch-corrected approaches over a range of fuels and test conditions; the agreement is very good (less than 10% difference). Using the two measurement approaches, extensive flame speed information were obtained for lean syngas mixtures at a range of conditions: 1) 5 to 100% H2 in the H2/CO fuel mixture; 2) 300-700 K preheat temperature; 3) 1 to 15 atm pressure, and 4) 0-70% dilution with CO2 or N2. The second objective of this thesis is to use the flame speed data to validate leading kinetic mechanisms for syngas combustion. Comparisons of the experimental flame speeds to those predicted using detailed numerical simulations of strained and unstrained laminar flames indicate that all the current kinetic mechanisms tend to over predict the increase in flame speed with preheat temperature for medium and high H2 content fuel mixtures. A sensitivity analysis that includes reported uncertainties in rate constants reveals that the errors in the rate constants of the reactions involving HO2 seem to be the most likely cause for the observed higher preheat temperature dependence of the flame speeds. To enhance the accuracy of the current models, a more detailed sensitivity analysis based on temperature dependent reaction rate parameters should be considered as the problem seems to be in the intermediate temperature range (~800-1200 K).
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Bertok, Tibor. "Problematika zavádění ADS-B ve vzdušném prostoru Evropy a České republiky." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2014. http://www.nusl.cz/ntk/nusl-231049.

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This diploma thesis focuses on implementation issues of ADS-B in the airspace of Czech republic and Europe. Our introduction contains a review of necessity of this system and describes ADS-B. The next part addresses the legislation of this system in detail, also sums up the state of its implementation and the plan of implementation. Our conclusion shows the problems connected with the system , offers their solution and views for the future.
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Books on the topic "Prehľad"

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Gombač, Borut. Prehod. 2nd ed. Maribor: Založba Pivec, 2013.

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Kačala, Ján. Prehl̕ad dejín spisovnej slovenčiny. Martin: Matica slovenská, 2006.

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Májovský, Jozef. Karyotaxonomický prehl̕ad flóry Slovenska. Bratislava: Veda, 1987.

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Kadlec, Jaroslav. Prehled ceskych cirkevnich dejin. Vol. 2. Praha: ZVON, Ceske katolicke nakladatelstvi, 1991.

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Kadlec, Jaroslav. Prehled ceskych cirkevnich dejin. Vol. 1. Praha: ZVON, Ceske katolicke nakladatelstvi, 1991.

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David, Bordwell, ed. Dejiny filmu: Prehled svetove kinematografie. 2nd ed. Praha: AMU, 2007.

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Junas, Ján. Dejiny medicíny a zdravotníctva: Prehl̓ad. Martin: Vydavatel̕stvo Osveta, 1985.

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Bučar, France. Prehod čez rdeče morje. Ljubljana: Založba Mihelač, 1993.

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Potemra, Michal. Školstvo na Slovensku v rokoch 1901-1918: Bibliografický prehlad. Košice: Štátna vedecká knižnica v Košiciach, 2000.

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Andruška, Peter. Krajanská literatúra a kultúra: Krátky prehla̕d. Nitra: Univerzita Konštantína. Filozofická fakulta. Katedra kulturológie, 2003.

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Book chapters on the topic "Prehľad"

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Gooch, Jan W. "Preheat Roll." In Encyclopedic Dictionary of Polymers, 584–85. New York, NY: Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4419-6247-8_9391.

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Pritchard, David, and Shaik Feroz. "Compression, Preheat and Desulphurisation." In Mass and Energy Balancing, 67–77. First edition. | Boca Raton, FL : CRC Press, 2021.: CRC Press, 2021. http://dx.doi.org/10.1201/9781003149200-4.

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Rye, Ketil Å. "Cell Preheat/Start-up and Early Operation." In Essential Readings in Light Metals, 718–22. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-48156-2_107.

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Rye, Ketil Å. "Cell Preheat/Start-up and Early Operation." In Essential Readings in Light Metals, 718–22. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2013. http://dx.doi.org/10.1002/9781118647851.ch107.

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McEwan, W., M. Abou-Ali, and C. Irgens. "A Knowledge Based System for Material Preheat in Welding." In Applications of Artificial Intelligence in Engineering VI, 329–41. Dordrecht: Springer Netherlands, 1991. http://dx.doi.org/10.1007/978-94-011-3648-8_22.

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Fearn, Jon, Chris Pearce, Bas Pijnenburg, and James Calder. "Prevention Strategies and Prehab for Lateral Ankle Instability." In Lateral Ankle Instability, 85–92. Berlin, Heidelberg: Springer Berlin Heidelberg, 2021. http://dx.doi.org/10.1007/978-3-662-62763-1_9.

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Alzarooni, Abdalla, Nadia Ahli, Alexander Arkhipov, Sajid Hussain, Lalit Mishra, Sergey Akhmetov, and Kamel Alaswad. "DX+ Ultra Industrial Version: Preheat Start Up and Early Operation." In The Minerals, Metals & Materials Series, 721–29. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-72284-9_93.

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Parris, N., J. H. Woychik, and P. Cooke. "Effect of Preheat Temperature on the Hydrophobic Properties of Milk Proteins." In ACS Symposium Series, 25–41. Washington, DC: American Chemical Society, 1991. http://dx.doi.org/10.1021/bk-1991-0454.ch003.

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Lim, Seong Taek, Yong Yun Lee, and Il Sang Eun. "Microstructural Evolution during Ingot Preheat in 7xxx Aluminium Alloys for Thick Semiproduct Applications." In Materials Science Forum, 549–54. Stafa: Trans Tech Publications Ltd., 2006. http://dx.doi.org/10.4028/0-87849-408-1.549.

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Johnson, R. R. "The Achievement of Adiabatic Compression of D-T Fuel as a Result of Reducing Preheat." In Laser Interaction and Related Plasma Phenomena, 477–93. Boston, MA: Springer US, 1986. http://dx.doi.org/10.1007/978-1-4615-7335-7_34.

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Conference papers on the topic "Prehľad"

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Scott, James, A. J. Bernheim Brush, John Krumm, Brian Meyers, Michael Hazas, Stephen Hodges, and Nicolas Villar. "PreHeat." In the 13th international conference. New York, New York, USA: ACM Press, 2011. http://dx.doi.org/10.1145/2030112.2030151.

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ISTÓK, Vojtech. "PREHĹAD INTERNETOVEJ JAZYKOVEDY V MEDZINÁRODNEJ A MAĎARSKEJ ODBORNEJ LITERATÚRE." In 11th International Conference of J. Selye University. J. Selye University, Komárno, Slovakia, 2019. http://dx.doi.org/10.36007/3310.2019.89-104.

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Larsen, Jon T., Roy R. Johnson, and KMS Fusion. "The KMSF low preheat implosion experiments." In Conference on Lasers and Electro-Optics. Washington, D.C.: OSA, 1986. http://dx.doi.org/10.1364/cleo.1986.thp3.

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Lambourn, Gerald A., and Marc Durrieu. "FOULING IN CRUDE OIL PREHEAT TRAINS." In Archives of Heat Transfer. Washington: Hemisphere, 1988. http://dx.doi.org/10.1615/ichmt.1988.20thaht.280.

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Lambourn, Gerald A., and Marc Durrieu. "FOULING IN CRUDE OIL PREHEAT TRAINS." In Archives of Heat Transfer. Connecticut: Begellhouse, 1988. http://dx.doi.org/10.1615/ichmt.1988.aht.280.

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Larsen, Jon T., and Roy R. Johnson. "The KMSF low preheat implosion experiments." In AIP Conference Proceedings Volume 160. AIP, 1987. http://dx.doi.org/10.1063/1.36759.

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King, Graeme, Ian Phiri, and John Greenslade. "Strain Based Design Versus Preheat for Hotbit Pipelines." In 2014 10th International Pipeline Conference. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/ipc2014-33289.

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The first buried hot bitumen (hotbit) pipeline is now operating successfully in the Alberta oil sands north of Fort McMurray and more are on the way. These hotbit pipelines are designed to transport raw, undiluted bitumen to a central refining plant at temperatures up to 140°C. They are constructed in winter when the ground is frozen allowing heavy construction equipment to travel across the watery muskeg terrain without sinking. Construction continues even when atmospheric temperatures fall as low as −30°C. Hotbit pipelines are buried with more than 1.2 m of cover, which can prevent them from expanding when they are heated from their locked-in installation temperature to their operating temperature of 140°C. Large longitudinal compressive stresses induced by this restrained thermal expansion combined with high hoop tensile stresses due to internal pressure produce stresses in the pipe wall that exceed the maximum allowable combined stress of 90%SMYS specified in North American pipeline codes (ASME B31.4 and CSA Z662). Two methods are available to handle these high combined stresses in hotbit pipelines. The first method is to expand the pipe during construction by preheating it to a temperature of approximately 90°C and then locking in the expansion by backfilling the pipeline trench before the pipe has had a chance to cool. By limiting the positive temperature differential between installation and operation to approximately 50°C, this method keeps thermally induced axial compressive stresses low enough that the combined stress does not exceed the allowable limit of 90%SMYS specified by pipeline codes. In the second method, the pipeline is still constructed in winter but without preheating. Temperature differentials and thermally induced axial compressive forces are much higher than in the first method and carefully engineered restraint is require to prevent the pipe from failing by pushing out of the ground at bends or by either lateral or upheaval buckling of long straight sections in muskeg swamps and bogs. This method requires strain-based design principles to show that, when the pipeline is first heated to its operating temperature, large thermally induced compressive stresses in the pipe wall are acceptable because they dissipate without causing failure when the pipe steel yields. Both methods are technically acceptable but require specialized pipeline engineering skills to implement them successfully. The first method incurs the cost of preheating and increased construction costs due to reduced pipe lay rates while the second method incurs the cost of more robust restraint systems, particularly at bends. Details of both methods are presented and discussed to determine which of the two methods has the least cost and the least risk.
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Zagernik, Sara, and Saša Pipan. "Prehod iz šolskih klopi v delovno okolje." In 37. mednarodna konferenca o razvoju organizacijskih znanosti, Portorož, Slovenija/ 37th International Conference on Organizational Science Development, Portorož, Slovenia. Univerzitetna založba Univerze v Mariboru / University of Maribor Press, 2018. http://dx.doi.org/10.18690/978-961-286-146-9.95.

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Juršnik, Luka, and Gordana Budimir. "Prehod aplikacij z ogrodja angularjs na angular." In Sodobne tehnologije in storitve. University of Maribor Press, 2017. http://dx.doi.org/10.18690/978-961-286-040-0.5.

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Fridlyand, Aleksandr, Brian Sutherland, and Paul Glanville. "Preheat Limits in Practical Combustor Design: Experiments and Simulations." In ASME 2018 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/imece2018-88111.

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Autoignition in commercial and residential gas appliances is typically a phenomenon to be avoided. The autoignition temperature for a particular fuel, defined as the minimum temperature at which spontaneous ignition will occur without an external source of energy, is often used to characterize this phenomenon. In the design of combustion systems, it is used to demarcate conditions where autoignition may occur. In an emerging class of residential and commercial heating, cooling, and power generation appliances, preheating air and fuel can provide an effective means of boosting the overall energy efficiency by recuperating residual energy in the exhaust and reinvesting it back into the thermodynamic process. In such applications, the design question to answer is: How much can the air and fuel be preheated without autoignition? The autoignition temperature, often determined experimentally and can vary as much as 100°C for methane, may not be the most useful metric in this context. This work describes the results of a recent experimental investigation into the preheat limits for autoignition of air and natural gas with the aim of recuperating as much heat as possible in a heat pump. The experimental apparatus consisted of an air-fuel mixer supplying preheated mixture to a radiant burner. The air was first heated in excess of 750°C, cool natural gas was injected into and mixed with the hot-air stream, and all while avoiding autoignition. The current capability to predict autoignition in such applications a priori was also assessed using available chemical kinetic models and numerical simulations.
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Reports on the topic "Prehľad"

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Energy & Environmental Resources, Inc. Batch Preheat for glass and related furnace processing operations. Office of Scientific and Technical Information (OSTI), August 2002. http://dx.doi.org/10.2172/816025.

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Slutz, Stephen A. On the Feasibility of Charged Particle-Beam Preheat for MagLIF. Office of Scientific and Technical Information (OSTI), March 2015. http://dx.doi.org/10.2172/1172476.

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Harvey-Thompson, Adam James, Matthias Geissel, Adam B. Sefkow, and Taisuke Nagayama. Investigating Laser Preheat and Applied Magnetic Fields Relevant to the MagLIF Fusion Scheme. Office of Scientific and Technical Information (OSTI), October 2016. http://dx.doi.org/10.2172/1562839.

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Slutz, Stephen A. Simulation of MagLIF laser preheat experiments using 1 Quad of the NIF: a starting. Office of Scientific and Technical Information (OSTI), December 2014. http://dx.doi.org/10.2172/1173207.

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Wallace, Sean, Scott Lux, Constandinos Mitsingas, Irene Andsager, and Tapan Patel. Performance testing and modeling of a transpired ventilation preheat solar wall : performance evaluation of facilities at Fort Drum, NY, and Kansas Air National Guard, Topeka, KS. Engineer Research and Development Center (U.S.), September 2021. http://dx.doi.org/10.21079/11681/42000.

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This work performed measurement and verification of installed, operational solar wall systems at Fort Drum, NY, and Forbes Field, Air National Guard, Topeka, KS. Actual annual savings were compared estimated savings generated by a solar wall modeling tool (RETScreen). A comparison with the RETScreen modeling tool shows that the measured actively heated air provided by the solar wall provides 57% more heat than the RETScreen tool predicted, after accounting for boiler efficiency. The solar wall at Fort Drum yields a net savings of $851/yr, for a simple payback of 146 years and a SIR of 0.16. RETScreen models indicate that the solar wall system at Forbes Field, Kansas Air National Guard, Topeka, KS saves $9,350/yr, for a simple payback of 58.8 years and a SIR of 0.34. Although results showed that, due to low natural gas prices, the Fort Drum system was not economically viable, it was recommended that the system still be used to meet renewable energy and fossil fuel reduction goals. The current system becomes economical (SIR 1.00) at a natural gas rate of $16.00/MMBTU or $1.60 /therm.
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System Performance Measurement Supports Design Recommendations for Solar Ventilation Preheat System (Brochure). Office of Scientific and Technical Information (OSTI), August 2011. http://dx.doi.org/10.2172/1021804.

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