Automatic Power Backup System for Industrial Networks

Tato práce se zabývá problematikou automatického přepínání zdrojů v průmyslových sítích. Seznámíme se s touto problematikou a blíže se podíváme na to, proč je nepřetržitost dodávky elektrické energie ve světě velmi důležitým faktorem. Automatické přepínání zdrojů je klíčové pro zajištění kontinuity napájení v kritických aplikacích, kde je důležité zachovat nepřerušený provoz i v případě výpadku primárního zdroje energie. V následujících kapitolách jsou rozepsány různé způsoby zajištění kontinuity dodávky elektrické energie a problematika samotného automatického záskoku. Poslední sekce jsou věnovány návrhu a samotné konstrukci rozvaděče, který bude ve společnosti ABB s.r.o využíván pro vzdělávání zaměstnanců v oblasti této problematiky.This diploma thesis deals with the problem of automatic source switching in industrial networks. We will introduce this issue and take a closer look at why continuity of power supply is a very important factor in the world. Automatic switching of power sources is key to ensure power continuity in critical applications where it is important to maintain uninterrupted operation even in the event of a failure of the primary power source. In the following chapters, the different ways of ensuring continuity of power supply and the issue of automatic standby power itself are described. The last sections are devoted to the construction of a switchboard that will be used in ABB s.r.o. for training employees in this field.410 - Katedra elektroenergetikyvýborn

PID Controller Design for Two Tanks Liquid Level Control System Using Matlab

The industrial application of Coupled Tank System (CTS) is widely used especially in chemical process industries. The control of liquid level in tanks and flow between tanks is a problem in the process technologies. The process technologies require liquids to be pumped, stored in tanks, and then pumped to another tank systematically. This paper presents development of Proportional-Integral-Derivative (PID) controller for controlling the desired liquid level of the CTS. Various conventional techniques of PID tuning method will be tested in order to obtain the PID controller parameters. Simulation is conducted within MATLAB environment to verify the performances of the system in terms of Rise Time (Ts), Settling Time (Ts), Steady State Error (SSE) and Overshoot (OS). The trial and error method of tunning will be implemented and all the performance results will be analyzed using MATLAB. It has been demonstrated that performances of CTS can be improved with appropriate technique of PID tuning methods

Hydrogen technologies utilization in the area of energetics

Táto bakalárska práca sa zaoberá analýzou súčasného stavu využitia technológií ktoré pracujú na báze vodíka. Zoznámime sa s týmto prvkom a priblížime si bližšie jeho použitie v dnešnej dobe ale aj jeho potenciál v budúcnosti, či už ako záložný zdroj, palivo, alebo v domácnosti. V nasledujúcich kapitolách sú rozpísané rôzne využitia vodíkových technológií ktoré výrazne prispievajú rôznym odvetviam techniky. Rozdelíme si výrobu vodíka podľa farieb, popíšeme si jeho využitia ako záložný zdroj, jeho použitie v kogenerácií a výrobu alternatívnych palív kde vodík taktiež hrá rolu. Neskôr si povieme o situácií v Ostrave a možné využitia vodíka v tomto regióne. V posledných kapitolách sú popísané budúce plány v rámci Európskej únie.This bachelor thesis deals with the analysis of the current state of use technologies that work on the basis of hydrogen. We will get acquainted with this element and take a closer look at its use today, but also its potential in the future, whether as a backup source, fuel, or in the home. The following chapters describe the various uses of hydrogen technologies that make a significant contribution to various industries. We will divide the production of hydrogen according to colors, describe its use as a backup source, its use in cogeneration and the production of alternative fuels where hydrogen also plays a role. We will also talk about the situations in Ostrava and the possible use of hydrogen in this region. The latest chapters describe further plans within European Union.410 - Katedra elektroenergetikyvelmi dobř

Character marking in children's narratives

U logopedskom istraživačkom i kliničkom radu, pripovijedanje je jedna od mjera pragmatičke sposobnosti. Polazište u ovom radu analiza je na mikrostrukturalnoj razini, kojom se željelo utvrditi što vrste riječi, koje djeca prilikom pripovijedanja koriste za označavanje likova, govore o njihovim pragmatičkim sposobnostima. U tu svrhu, promatralo se kojim riječima djeca u usporedbi s odraslima uvode likove u priču i uspostavljaju anaforičke odnose. U istraživanju su sudjelovale tri skupine ispitanika: djeca predškolske dobi (5;04-6;05 godina), djeca rane školske dobi (6;06-7;06 godina) te odrasli govornici kao kontrolna skupina. Za potrebe istraživanja odabrana je metoda pripovijedanja na temelju slikovnog materijala iz hrvatske inačice MAIN-a: Višejezičnog instrumenta za ispitivanje pripovijedanja. Promatralo se kako ispitanici označavaju svih pet likova u priči Koze. Kako bi se tri skupine ispitanika usporedile, provedena je neparametrijska statistička analiza. Statistički značajne razlike između dvije skupine djece i odraslih pronađene su na svim ispitanim mjerama: uvođenju likova u priču, ponovnom uvođenju likova i održavanju likova u priči te u broju nepravilnih označavanja likova. Podaci također pokazuju da postoji razvojna putanja u ovladavanju uspješnim označavanjem likova kod djece. Statistički značajna razlika između sve tri skupine ispitanika pokazala se u broju nepravilnih označavanja likova. Mlađa djeca pokazala su manju uspješnost u označavanju likova na pravilan način od starije djece. To je jasan pokazatelj da djeca nisu dostigla razinu pragmatičkih sposobnosti i osjetljivosti na perspektivu sugovornika kakvu imaju odrasli govornici. Zanimljiv je podatak da u malom broju slučajeva i odrasli ispitanici griješe, što se može objasniti složenošću priče koja je odabrana za poticanje pripovijedanja.In the speech - language pathology research and clinical work, narration is one of the measures of pragmatic abilities. The starting point of this thesis is the analysis on the microstructural level, which was used to determine what the types of words used by children for character reference in narration say about their pragmatic abilities. For this purpose, the words that children use to introduce characters to the narrative and establish anaphoric reference were observed in comparison with the words used by adults. The research involved three groups of subjects: preschool-age children (5;04-6;05 years old), early school-age children (6;06-7;06 years old) and adult speakers as the control group. The storytelling method selected for the purposes of the research is based on the pictorial material from the Croatian version of MAIN: Multilingual Assessment Instrument for Narratives. What was observed is the way in which subjects refer to the five characters in the story Goats. In order to compare the three groups of subjects, a nonparametric statistical analysis was conducted. Statistically significant differences between the two groups of children and the group of adults were found in all of the tested variables: the introduction of the characters to the narrative, the reintroduction of the characters and their maintenance in the narrative, as well as the number of ambiguous character references. The data also indicate that there is a development path in mastering how to refer to characters in an unambiguous way. A statistically significant difference between the three groups of subjects was found in the number of ambiguous character references. This is a clear indication that the children have not reached the same level of pragmatic abilities and sensitivity to the interlocutor’s perspective as adult speakers. Younger children demonstrated a lower success rate in the unambiguous character reference than older children. It is interesting to note that in a small number of cases adult subjects also made mistakes. This can be explained by the complexity of the story chosen for narrative elicitation

Vitamin D3-loaded electrospun cellulose acetate/polycaprolactone nanofibers: Characterization, in-vitro drug release and cytotoxicity studies

Vitamin D deficiency is nowa global health problem; despite several drug delivery systems for carrying vitaminD due to low bioavailability and loss bioactivity. Developing a new drug delivery system to deliver vitamin D3 is a strong incentive in the current study. Hence, an implantable drug delivery system (IDDS) was developed from the electrospun cellulose acetate (CA) and ε-polycaprolactone (PCL) nanofibrous membrane, in which the core of implants consists of vitamin D3-loaded CA nanofiber (CAVD) and enclosed in a thin layer of the PCL membrane (CAVD/PCL). CA nanofibrousmat loadedwith vitaminD3 at the concentrations of 6, 12, and 20% (w/w) of vitamin D3 were produced using electrospinning. The smooth and bead-free fibers with diameters ranged from 324 to 428 nm were obtained. The fiber diameters increased with an increase in vitamin D3 content. The controlled drug release profile was observed over 30-days, which fit with the zero-order model (R2 > 0.96) in the first stage. The mechanical properties of IDDS were improved. Young's modulus and tensile strength of CAVD/PCL (dry) were161 ± 14 and 13.07 ± 2.5 MPa, respectively. CA and PCL nanofibers are non-cytotoxic based on the results of the in-vitro cytotoxicity studies. This study can further broaden in-vivo study and provide a reference for developing a new IDDS to carry vitamin D3 in the future

Little steps to interesting results: how the Creative World of Stories was started in Ivan Goran Kovačić Public Library, Zagreb City Libraries

Kreativni svijet priča ciklus je radionica u Knjižnici Ivana Gorana Kovačića koji je pokrenut 2017. godine povodom 60. obljetnice knjižnice. Cilj programa poticanje je aktivnog i kritičkog čitanja te čitanja s razumijevanjem, a namijenjen je djeci od tri do devet godina. Program uključuje čitanje odabranih preporučenih slikovnica ili slikovnica po vlastitom izboru, jezične i misaone igre te kreativno izražavanje. Usmjeren je na razvoj socijalnih vještina i empatije, jačanje komunikacijskih sposobnosti i obogaćivanje vokabulara

Preanalytics of urine sediment examination: effect of relative centrifugal force, tube type, volume of sample and supernatant removal

Introduction: Laboratories often modify procedures recommended by the European Urinalysis Guidelines for urine sediment analysis. The aim of this study was to compare the recommended protocol with our routine laboratory procedure and to evaluate the possible impact of modifications in the relative centrifugal force, type of tube, method of supernatant aspiration and urine volume on patient’s results. Material and methods: Firstly, relative centrifugal force was investigated using 20 pairs of samples examined after centrifugation at 400xg and 1358xg. In phase two, 110 samples were examined, paired as: round bottom vs conical tube (N = 46), decanting vs suction of supernatant (N = 100) and 10 mL vs 5 mL of urine sample (N = 101). Results: The number of erythrocytes, leukocytes and squamous epithelial cells was significantly lower after centrifugation at 400xg (P = 0.001, 0.002 and 0.004, respectively). The number of leukocytes was significantly lower in conical tubes (P = 0.010), after the suction of supernatant (P = 0.045) and in 5 mL urine (P < 0.001). The number of squamous epithelial cells was significantly lower after the suction of supernatant (P < 0.001) and in 5 mL urine (P < 0.001). The number of erythrocytes (P < 0.001), total non-hyaline casts (P < 0.001) and the frequency of granular casts (P = 0.039) was significantly lower in 5 mL urine. Conclusion: Lower results of leukocytes, erythrocytes, squamous cells and non-hyaline casts were recorded in recommended procedures (centrifugation at 400xg, suction of supernatant, conical tube, 5 mL of sample) than in routine procedure (centrifugation at 1358xg, decanting of supernatant, round bottom tube, 10 mL) used in our laboratory