351 research outputs found
Conventional QT variability measurement vs. template matching techniques: comparison of performance using simulated and real ECG
No full textIncreased beat-to-beat variability in the QT interval (QTV) of ECG has been associated with increased risk for sudden cardiac death, but its measurement is technically challenging and currently not standardized. The aim of this study was to investigate the performance of commonly used beat-to-beat QT interval measurement algorithms. Three different methods (conventional, template stretching and template time shifting) were subjected to simulated data featuring typical ECG recording issues (broadband noise, baseline wander, amplitude modulation) and real short-term ECG of patients before and after infusion of sotalol, a QT interval prolonging drug. Among the three algorithms, the conventional algorithm was most susceptible to noise whereas the template time shifting algorithm showed superior overall performance on simulated and real ECG. None of the algorithms was able to detect increased beat-to-beat QT interval variability after sotalol infusion despite marked prolongation of the average QT interval. The QTV estimates of all three algorithms were inversely correlated with the amplitude of the T wave. In conclusion, template matching algorithms, in particular the time shifting algorithm, are recommended for beat-to-beat variability measurement of QT interval in body surface ECG. Recording noise, T wave amplitude and the beat-rejection strategy are important factors of QTV measurement and require further investigation.Mathias Baumert, Vito Starc and Alberto Port
THE MYSTICISM OF FIGURES IN MUSICAL WORKS
No full textV diplomskem delu z naslovom Mistika števil v glasbenih delih je predstavljena povezava med dvema izmed najstarejših ved, matematiko in glasbo. Raziskana in opisana je uporaba števil, simbolov in matematičnih zakonitosti v posameznih glasbenih delih.
Predstavljeno je tudi življenje in delo skladateljev Györgyja Ligetija, Béla Bartóka, Pierra Bouleza in Johanna Sebastiana Bacha. Poseben poudarek pa je namenjen obravnavi mistike števil v Ligetijevih, Bartókovih, Boulezovih in Bachovih glasbenih delih.
V diplomski nalogi je uporabljena deskriptivna in zgodovinska metoda analize primarnih in sekundarnih virov.In the thesis titled “The mysticism of figures in musical works” the connection between two of the oldest sciences, i.e. the mathematics and music, is presented. The use of figures, symbols and mathematical laws in individual musical works is researched and described.
The lives and work of the composers György Ligeti, Béla Bartók, Pierre Boulez and Johann Sebastian Bach are also presented. A special emphasis is given to the discussion of mysticism of figures in the musical works of Ligeti, Bartók, Boulez and Bach.
In the thesis a descriptive as well as historical method of primary and secondary sources analysis are used
Lindelöf spaces
No full textLindelöfovi prostori so regularni topološki prostori, katerih vsako odprto pokritje vsebuje števno podpokritje. Lindelöfova lastnost je poslošitev bolj znanega pojma kompaktnosti, ki zahteva obstoj končnega podpokritja.
V diplomskem delu so zajete lastnosti Lindelöfovih prostorov, opisani so njihovi osnovni primeri in izreki.
V prvem delu so navedeni osnovni pojmi, ki jih potrebujemo pri opisovanju Lindelöfovih prostorov. Drugi del obravnava pojem kompaktnosti. V tretjem delu je opisano kaj so Lindelöfovi prostori, njihove lastnosti, primeri in kaj velja za produkt Lindelöfovih prostorov.
Na koncu se diplomsko delo dotakne še zgodovine Lindelöfovih prostorov.
Končna ugotovitev kaže na to, da določene lastnosti kompaktnih prostorov veljajo tudi za
Lindelöfove prostore. Na primer, da je vsak 2-števen prostor Lindelöfov in da je vsak
Lindelöfov prostor normalen. Tudi zvezna preslikava ohranja Lindelöfovo lastnost, kar pa ne velja za produkt, saj niti produkt dveh Lindelöfovih prostorov ni nujno Lindelöfov.Lindelöf spaces are regular topological spaces such that each of their open covers contains a countable subcover. The Lindelöf spaces are a generalization of the notion of compact spaces, which require the existence of a finite subcover.
In the Graduation Thesis, the basic properties of Lindelöf spaces are given. We also produce many useful examples.
In the first part of the thesis, we introduce the basic concepts that are needed to describe the Lindelöf spaces. In the second part we discuss the notion of compactness, and, finally in the third part, we introduce the Lindelöf spaces, describe many of their properties, and produce many examples. We also give a special emphasis to the product of the Lindelöf spaces. At the end of the thesis we give a historic overview on the Lindelöf spaces.
As a final finding we may conclude that certain properties of compact spaces also apply to the Lindelöf spacesfor example, every second-countable space is a Lindelöf space and every Lindelöf space is normal. Even more, every continuous map is the Lindelöf property preserving map. However, the product of two Lindelöf spaces is not necessarily a Lindelöf space
Dejavniki spolnega zadovoljstva v Sloveniji
No full textV primeru znanstvene monografije Dejavniki spolnega zadovoljstva v Sloveniji, avtorjev Andrej Starc, Raja Dahmane Gošnak, Branko Gabrovec gre za obsežno in zahtevno delo, v katerem so avtorji podrobno predstavili dejavnike spolnega zadovoljstva ter rezultate raziskave, v okviru katere so proučevali značilnosti spolnega zadovoljstva med prebivalci v Sloveniji. Analiza temelji na odgovorih, ki so jih je posredovali 6903 udeleženci raziskave z izpolnitvijo mednarodno validiranega vprašalnika
Using the method of support vektor machine for predicting changes in exchange rates of stock index
No full textThe importance of a personal relationship between the user and their personal assistant
No full textOsebna asistenca je storitev, namenjena osebam, ki za neodvisno življenje potrebujejo pomoč drugega. Zagotavlja jim pomoč pri dnevnih opravilih in v gospodinjstvu, spremstvo, pomoč pri izobraževanju ali na delovnem mestu ter pomoč v komunikaciji. Temelj storitve osebne asistence je, da uporabnik v sodelovanju z osebnim asistentom samostojno upravlja odločitve, povezane s svojim življenjem. Osebna asistenca zahteva spoštovanje dostojanstva in neodvisnosti uporabnika, njihove svobodne odločitve izbire izvajalca osebne asistence, osebnih asistentov in načina izvajanja osebne asistence. Zagotavljanje osebne asistence stremi k omogočanju uporabnikom vključenost v družbo in zagotavljanju enakih možnosti.
V raziskavi smo se posvetili uporabniški perspektivi doživljanja odnosa z osebnimi asistenti z vidika intimnosti in zaupanja. V raziskavo smo na podlagi tega vključili devet uporabnikov osebne asistence, ki svojo pravico do te uveljavljajo najmanj eno leto. S fenomenološko metodo smo raziskovali, kako doživljajo storitev osebne asistence, kaj jim ta v življenju pomeni, kako doživljajo odnos z osebnimi asistenti ter predvsem, kako doživljajo svoj intimni prostor v tem odnosu, kakšne so njegove meje in temeljne komponente za zagotavljanje zaupanja.
Večina udeležencev odnos z osebnimi asistenti doživlja pozitivno in se v svojem intimnem prostoru počuti varno. Ključ do varnega intimnega prostora in prisotnosti zaupanja v odnosu pa se skriva v medsebojnem spoštovanju in sodelovalnem pristopu, asistentovem upoštevanju navodil uporabnika vključno z željo po zasebnosti ter v spoštovanju uporabnikove pravice, da o svojem načinu življenju in delovanju odloča sam.Personal assistance is a service intended for people who need the help of others to live independently. It provides them with help in daily tasks and the household, accompaniment, education or at the workplace, and communication. The basis of the personal assistance service is that the user independently manages decisions related to his life in cooperation with the personal assistant. Personal assistance requires respect for the user’s dignity and independence, his free decision in the selection of the provider of personal assistance, personal assistants, and the method of providing personal assistance. The provision of personal assistance strives to enable users to be included in society and to provide equal opportunities.
In the research, we focused on the user\u27s perspective of experiencing a relationship with personal assistants from the point of view of intimacy and trust. Based on this, we included 9 users of personal assistance in the research. They have been exercising their right to personal assistance for at least one year. Using the phenomenological method, we investigated how they experience the personal assistance service, what it means to them in their lives, how they experience their relationship with personal assistants, and, especially, how they experience their intimate space in this relationship, and what are its boundaries and the fundamental components for ensuring trust.
Most participants experience the relationship with personal assistants positively and feel safe in their intimate space. The key to a safe intimate space and the presence of trust in the relationship lies in mutual respect and a cooperative approach, the assistant\u27s compliance with the user\u27s instructions, including the desire for privacy, and respecting the user\u27s right to decide on his way of life and work
Seismic stress test of the building stock of the University of Ljubljana
No full textNezanimanje ljudi in državnih organov za krepitev potresne odpornosti objektov je posledica pomanjkanja lastnih izkušenj s katastrofalnimi naravnimi pojavi. Varljiv je predvsem občutek varnosti v primeru potresov, saj so močni potresi redki, vendar pa je njihov potencial za negativne posledice zelo visok. Da bi med študentkami in študenti vzpostavili nepristransko dojemanje potresnega tveganja, smo izvedli seizmični stresni test stavbnega fonda Univerze v Ljubljani. Podatke za namen raziskave nam je v večji meri zagotovila Univerza v Ljubljani. Dodatne informacij smo pridobili s pregledom stavb in projektne dokumentacije ter na osnovi že opravljenih analiz. Na ta način smo razvili model izpostavljenosti stavbnega fonda ter ga nato dopolnili z modelom potresne nevarnosti, modelom potresne ranljivosti in modelom posledic potresa na stavbe in ljudi. Vse modele smo nato vključili v analizo potresnega tveganja. V okviru magistrske naloge smo razvili parametričen model za oceno potisnih krivulj stavb, kar omogoča oceno potresne ranljivosti stavbe na osnovi nelinearnih dinamičnih analiz poenostavljenega nelinearnega modela stavbe. Rezultati študije kažejo, da je ogroženost človeških življenj na Univerzi v Ljubljani zaradi nevarnosti potresov previsoka. Srednja letna povratna doba za pojav izgube življenja med študenti zaradi potresov znaša le 6 let, kar presega sprejemljivo potresno tveganje za izgubo življenja v primeru posodobljenega stavbnega fonda za faktor 26. Poleg tega so previsoke tudi finančne izgube, saj smo ocenili, da znaša pričakovani letni strošek za odpravo škode na stavbnem fondu 1.040.000 EUR, kar je skoraj četrtina vseh sredstev iz razvojnega stebra za financiranje Univerze v Ljubljani.The lack of interest on the part of the population and the national authorities in strengthening the earthquake resistance of buildings is a consequence of the lack of their own experience with catastrophic natural phenomena. The feeling of safety in the event of earthquakes is particularly deceptive because strong earthquakes are rare, but their potential for adverse effects is very high. In order to establish an unbiased perception of seismic risk among students, we conducted a seismic stress test of the building stock of the University of Ljubljana. The data for the purposes of this study was mainly provided by the University of Ljubljana, and some of the information was also obtained by inspecting the buildings and project documentation and on the basis of previous analyses. We developed an exposure model for the building stock, which was supplemented by a seismic hazard model, a seismic fragility model and an earthquake impact model for buildings and people. All models were then included in the seismic risk analysis. We developed a parametric model for estimating the pushover curves of buildings, which allows to analyse the seismic fragility of a single building by nonlinear dynamic analyses of a simplified nonlinear building model. The results of the study show that the seismic fatality risk at the University of Ljubljana is too high. The average annual return period for loss of life among students is only 6 years, which exceeds the acceptable fatality risk for an updated building stock by a factor of 26. Moreover, the financial losses are too high. The annual cost of repairing seismic damage to the building stock was estimated at EUR 1,040,000, which represents almost a quarter of all funds allocated to the University of Ljubljana from the Development of Funding pillar
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