246 research outputs found
The Khozhenie za tri morya of Afanasy Nikitin: a critical edition
Get PDFThe subject of this thesis is the Khozhenie za tri morya, an account of a journey to India by a 15th century Russian merchant, Afanasy Nikitin, of his sojourn there and of his return thence. After a brief introduction the author examines the history of this document both with regard to early copies of the text and to more recent attitudes towards the work. The second section consists of a translation into English of the fullest version of the text which has been obtained by taking the fullest extant copy and adding to it various words, phrases and passages which only occur in other versions. The third section of the work consists of commentary notes on the translation with particular emphasis on the vocabulary used by Nikitin and on points of general interest. In the fourth section, "Notes on the Historical and Geographical Background to the Khozhenie", the author examines the history of the various regions through which Nikitin passed, thereby building up a picture of the conditions which he encountered. There are notes on the location and character of the various towns through which he passed. The next section, "Russian Awareness of India before Nikitin", examines the question of how much was known of India in medieval Russia. The author makes the point that it was not an entirely unknown land and that certain connections had existed between the two countries prior to Nikitin's visit. In the sixth section, "Nikitin - a Traveller among Travellers", Nikitin's work is contrasted with the works of other travellers to the East who had preceded him. It is pointed out that, whilst his account is perhaps less important than some Russian commentators maintain, it is worthy of more consideration than it has generally been granted in the West. A reference section, bibliography and glossary complete the original work in this thesis. Copies of several versions of the text are included in the appendices, as is a map showing Nikitin's route
Poems selected from Karamzin, Pushkin, Tyutchev, Lermontov, Count A. Tolstoy, Nikitin, Pleshcheyev, Nadson, and Sologub.
No full textAdded t.p. in Russian.Eight pages at end, with running title: Dlia zamietok.Poems in Russian, grouped under author; English translations follow each group.--Karamzin. --Pushkin. --Tyutchev. --Lermontov. --Count A. Tolstoy. -- Nikitin. -- Pleshcheyev. --Nadson. --Sologub.Mode of access: Internet
Numerical investigation of localized exact solutions of the Navier-Stokes equations in pipe flow
No full textThe edge state solution in pipe flow at Re=2200 is calculated numerically. The solution has the form of spatially localized puff-like structure drifting downstream. In the moving frame it is represented by a steady average flow and time-periodic pulsation flow. It is shown, that the Kelvin-Helmholtz instability mechanism is not valid for pulsation generation in the edge state flow
‘Revoljucija že byla prekrasna, stichijna'. Noč' di Nikolaj Nikitin
Get PDFDespite being one of the lesser known Serapion Brothers, Nikolaj Nikitin had a brilliant early career. He was acclaimed by M. Gorkij and the critic A. Voronskij as a very promising writer, able to convey the spirit of the post-revolutionary period, also in light of his personal experience as a volunteer in the Red Army. The frst phase of his literary production dates from 1922 to 1924. In the texts of this period the thematic focus is mainly on the experience of the revolution, while, stylistically, they are characterized by a highly evocative and musical language that reveals the infuence of A. Belyj's Simfonii. The article focuses on the long story (povest') Not", edited and redacted three times during 1923, more than any of Nikitin's novels. Being the most redacted and revised piece of Nikitin's long fction, the povest' ofers the possibility to investigate the relationship between the author and Voronskij who, more than anyone else, had a great impact on the young writer. The povest' focuses on the battle between two trains, one white (called "L.G. Kornilov") and one red (the "N. 14-7, Béla Kun"). In the frst edition, the result of the battle is not conveyed to the reader; the only outcome is destruction and pain, and this caused a very negative and passionate reaction from critics and readers. The comparison of the three redactions of the povest' shows the direction of the revisions, which started from a merely stylistic point of view and then moved to a more ideological layer, clarifying the result of the battle (now undoubtedly assigned to the Red Army) and highlighting the stichijnyj but deeply legitimate character of the Revolution itself. Starting from 1924, Nikitin will no longer participate in the meetings of the Serapion Brothers, and his poetics and chosen topics will change as well, moving in the stylistic and ideological direction that will be formalized in 1934 under the name of Socialist Realism
Physics demonstrations for upper secondary school students - a video study
Get PDFNázev práce: Fyzikální pokusy pro střední školy - videostudie Autor: Bc. Alexandr Nikitin Katedra / Ústav: Katedra didaktiky fyziky Vedoucí diplomové práce: RNDr. Marie Snětinová, Ph.D., Katedra didaktiky fyziky Abstrakt: Experiment je základním prvkem nejen ve fyzice jako vědě, ale také ve výuce fyziky. Přestože je poslední dobou více pozornosti věnováno samostatnému experimentování žáků, významnou roli ve školách stále hraje demonstrační experiment. Na katedře didaktiky fyziky MFF UK má projekt předvádění demonstračních experimentů pro studenty středních škol tradici více než 30 let a v současné době nabízí celkem sedm tematických celků. Předchozí výzkum provedený na vzorku cca 5100 studentů však ukázal, že tyto tematické celky jsou studenty vnímány poměrně odlišně zejména z hlediska jejich zájmu, vnitřní motivace a subjektivně vnímané užitečnosti a hodnoty. Nabízí se tedy otázka, zda existují parametry, které předurčují pozitivní vnímání demonstračních pokusů studenty - ať už by mělo jít o požadavky na lektora, o způsob práce s publikem či o výběr jednotlivých experimentů. Cílem této práce je představit videostudii zabývající se analýzou těchto vystoupení, jejíž výsledky poslouží k hledání předestřených parametrů. V práci je popsána metodologie tvorby kategoriálního systému užitého ve videostudii,...Title: Physics demonstrations for upper secondary school students - video study Author: Bc. Alexandr Nikitin Department: Department of Physics Education Supervisor: RNDr. Marie Snětinová, Ph.D., Department of Physics Education Abstract: Experiment is a key element not only for physics as science, but also for physics education. Even though attention has been lately focused more on students' hands-on experiments, demonstration experiments still play an important role in today's education. Department of Physics Education (Charles University, Faculty of Mathematics and Physics) has been performing physics demonstrations for upper secondary school students for more than 30 years. Seven different topics are currently offered by the Department. A survey conducted on a population of est. 5,100 students showed that the perception of these topics by students varies quite significantly, especially considering their intrinsic motivation and subjectively perceived value and usefulness of a given topic. The questions at hand are whether parameters that influence students' perception in negative or positive way do exist and how they are related to the choice of the experiments themselves or the lecturer's work with the audience. Aim of this thesis is to present a video study conducted on video recordings of all seven...Department of Physics EducationKatedra didaktiky fyzikyMatematicko-fyzikální fakultaFaculty of Mathematics and Physic
Physics demonstrations for upper secondary school students - a video study
Get PDFNázev práce: Fyzikální pokusy pro střední školy - videostudie Autor: Bc. Alexandr Nikitin Katedra / Ústav: Katedra didaktiky fyziky Vedoucí diplomové práce: RNDr. Marie Snětinová, Ph.D., Katedra didaktiky fyziky Abstrakt: Experiment je základním prvkem nejen ve fyzice jako vědě, ale také ve výuce fyziky. Přestože je poslední dobou více pozornosti věnováno samostatnému experimentování žáků, významnou roli ve školách stále hraje demonstrační experiment. Na katedře didaktiky fyziky MFF UK má projekt předvádění demonstračních experimentů pro studenty středních škol tradici více než 30 let a v současné době nabízí celkem sedm tematických celků. Předchozí výzkum provedený na vzorku cca 5100 studentů však ukázal, že tyto tematické celky jsou studenty vnímány poměrně odlišně zejména z hlediska jejich zájmu, vnitřní motivace a subjektivně vnímané užitečnosti a hodnoty. Nabízí se tedy otázka, zda existují parametry, které předurčují pozitivní vnímání demonstračních pokusů studenty - ať už by mělo jít o požadavky na lektora, o způsob práce s publikem či o výběr jednotlivých experimentů. Cílem této práce je představit videostudii zabývající se analýzou těchto vystoupení, jejíž výsledky poslouží k hledání předestřených parametrů. V práci je popsána metodologie tvorby kategoriálního systému užitého ve videostudii,...Title: Physics demonstrations for upper secondary school students - video study Author: Bc. Alexandr Nikitin Department: Department of Physics Education Supervisor: RNDr. Marie Snětinová, Ph.D., Department of Physics Education Abstract: Experiment is a key element not only for physics as science, but also for physics education. Even though attention has been lately focused more on students' hands-on experiments, demonstration experiments still play an important role in today's education. Department of Physics Education (Charles University, Faculty of Mathematics and Physics) has been performing physics demonstrations for upper secondary school students for more than 30 years. Seven different topics are currently offered by the Department. A survey conducted on a population of est. 5,100 students showed that the perception of these topics by students varies quite significantly, especially considering their intrinsic motivation and subjectively perceived value and usefulness of a given topic. The questions at hand are whether parameters that influence students' perception in negative or positive way do exist and how they are related to the choice of the experiments themselves or the lecturer's work with the audience. Aim of this thesis is to present a video study conducted on video recordings of all seven...Katedra didaktiky fyzikyDepartment of Physics EducationMatematicko-fyzikální fakultaFaculty of Mathematics and Physic
Structuring of plasma polymers: new methods for fabrication of nano-architectured thin films
No full textTitle: Structuring of plasma polymers: new methods for fabrication of nano-architectured thin films Author: Daniil Nikitin Department / Institute: Department of Macromolecular Physics/Charles University Supervisor of the doctoral thesis: Doc. Ing. Andrey Shukurov, PhD, Department of Macromolecular Physics/Charles University Abstract: The PhD thesis aims at the investigation of nanostructures based on plasma polymers. The main attention is paid to the combination of a gas aggregation cluster source with plasma-assisted vapor phase deposition for the fabrication of metal-polymer nanocomposites with bactericidal potential. Copper nanoparticles were incorporated into a biocompatible matrix of plasma polymerized poly(ethylene oxide) (ppPEO). The efficiency of such nanocomposite against multi-drug resistant bacteria was demonstrated. It was found that the segmental dynamics of the plasma polymer significantly changed in the presence of nanoparticles as revealed by the measurements of the dynamic glass transition temperature. The nanoscale confinement crucially influences the non-fouling properties of poly(ethylene oxide). A separate chapter is dedicated to the examination of the nanoparticle formation, growth and transport inside the source. Copper and silver nanoparticles were detected in situ in the gas phase..
Strukturování plazmových polymerů: nové metody přípravy tenkých vrstev s nano-architekturou
Get PDFNázev práce: Strukturování plazmových polymerů: nové metody přípravy tenkých vrstev s nano-architekturou Autor: Daniil Nikitin Katedra/Ústav: Katedra Makromolekulární Fyziky/Univerzita Karlova Vedoucí doktorské práce: Doc. Ing. Andrey Shukurov, PhD Abstrakt: Disertační práce je zaměřena na studium nanostruktur na bázi plazmových polymerů. Hlavní pozornost je věnována přípravě antibakteriálních nanokompozitních vrstev kov/polymer za použití plynového agregačního zdroje nanočástic a plazmatem asistované depozice z plynné fáze. Do biokompatibilní matrice plazmového polymeru poly(ethylen oxidu) (ppPEO) byly začleněny měděné nanočástice. Byla prokázána účinnost těchto nanokompozitů proti multi-rezistentním bakteriím. Pomocí měření dynamické teploty skelného přechodu bylo zjištěno, že se v přítomnosti nanočástic významně změnila segmentová dynamika plazmového polymeru. To zásadně ovlivnilo bio-rezistentní vlastnosti poly(ethylen oxidu). Samostatná kapitola je věnována studiu vzniku, růstu a transportu nanočástic uvnitř zdroje. Měděné a stříbrné nanočástice byly detekovány in situ v plynné fázi buďto pomocí maloúhlového rozptylu rentgenového záření, nebo pomocí UV-Vis spektroskopie. Vůbec poprvé bylo zjištěno zachytávání kovových nanočástic v plazmatu. Navíc byla potvrzena částečná re-depozice nanočástic na terč a...Title: Structuring of plasma polymers: new methods for fabrication of nano-architectured thin films Author: Daniil Nikitin Department / Institute: Department of Macromolecular Physics/Charles University Supervisor of the doctoral thesis: Doc. Ing. Andrey Shukurov, PhD, Department of Macromolecular Physics/Charles University Abstract: The PhD thesis aims at the investigation of nanostructures based on plasma polymers. The main attention is paid to the combination of a gas aggregation cluster source with plasma-assisted vapor phase deposition for the fabrication of metal-polymer nanocomposites with bactericidal potential. Copper nanoparticles were incorporated into a biocompatible matrix of plasma polymerized poly(ethylene oxide) (ppPEO). The efficiency of such nanocomposite against multi-drug resistant bacteria was demonstrated. It was found that the segmental dynamics of the plasma polymer significantly changed in the presence of nanoparticles as revealed by the measurements of the dynamic glass transition temperature. The nanoscale confinement crucially influences the non-fouling properties of poly(ethylene oxide). A separate chapter is dedicated to the examination of the nanoparticle formation, growth and transport inside the source. Copper and silver nanoparticles were detected in situ in the gas phase...Katedra makromolekulární fyzikyDepartment of Macromolecular PhysicsMatematicko-fyzikální fakultaFaculty of Mathematics and Physic
Suitability analysis of the robotic welding station for Estanc AS
No full textIgal aastal kasvab ettevõtetesse paigaldatud tööstusrobotite arv pidevalt. Selle põhjuseks on
eelkõige uuenduslikud saavutused tehisintellekti ja mehhatroonika vallas. Kaasaegsed
tööstusrobotid on väga töökindlad, autonoomsed ja multifunktsionaalsed, mis paneb ettevõtted
nende vastu huvi tundma, et tõsta toodangu kvaliteeti ja ettevõte tootlikkust.
Käesoleva lõputöö eesmärgiks oli hinnata keevituskomplekti sobivust ettevõttele Estanc AS.
Uurimise käigus hinnati roboti mõju tootlikkuse tõstmisele ja keevitatud toodete kvaliteedi
parandamisele. Kahes ettevõttes läbiviidud keevituskatsete tulemuste põhjal selgus, et robotiga
keevitusprotsess võib olla keskmiselt kaks korda kiirem võrreldes ainult käsitsi keevitusega. See
omakorda hoiab kokku raha ja muudab tooted odavamaks, mis omakorda tõstab konkurentsieelist.
Töös on tehtud ülevaade keevitusjaama komplekteerimisest ja keevituseks robotiga planeeritud
toodetest. Viimase kahe aasta projektide mitmekesisuse ja arvu põhjal on võimalik kompleksi
käivitada kahes vahetuses, osalise koormusega kolmandas vahetuses, mis peaks andma positiivse
mõju projekti tasuvusele.
Majanduslikus mõttes kompleksi tasuvusaeg on arvutatud keevituskatsete võrdlemisel saadud aja
erinevuse põhjal. Projekti tasuvusaeg on 9,8 kuni 14,6 aastat, mis on üsna pikk ajavahemik teatud
riskidega.
Praeguses keerulises majandusolukorras on raske prognoosida mitme aasta töömahtu ette. Ja pole
mingit garantiid, et seda kompleksi on võimalik nii pikaks ajaks tööga koormata. Vaatamata sellele,
et see jaam on produktiivne ja multifunktsionaalne, võib probleeme tekkida ka operaatorite
värbamisega. Arvestades töö spetsiifikat, eelistatakse operaatorina kohalikke keevituskogemusega
töötajaid, kellel lihtsalt ei pruugi olla soovi midagi uut õppida.
Antud keevituskompleksi hind on üle miljoni euro ja arvestades, et ettevõttel Estanc AS puudub
kogemus sarnase tüüpi keevitusrobotite osas, ehk tasub kaaluda odavamat ja lühema tasuvusajaga
varianti.
Ülaltoodud kokkuvõttes võib järeldada, et lõputöö püstitatud eesmärk on saavutatud.
Keevituskompleks sobib Estanc AS ettevõttele, kuid tänaseks on majanduslike tegurite mõjul antud
projekt investeeringuna edasi lükkunud.The number of industrial robots installed in companies is constantly growing every year. This is mainly due to innovative achievements in the field of artificial intelligence and mechatronics. Modern industrial robots are highly reliable, autonomous and multifunctional, which makes companies interested in them in order to increase the quality of production and the productivity of the company.
The aim of this thesis was to evaluate the suitability of the welding station for Estanc AS. The study assessed the impact of the robot on increasing productivity and improving the quality of welded products. The results of welding tests carried out in two companies show that the welding process with a robot can be on average twice as fast as with manual welding alone. This in turn saves money and makes products cheaper, which in turn increases the competitive advantage.
An overview of the assembly of the welding station and the products planned for welding with a robot is made in the work. Based on the diversity and number of projects in the last two years, it is possible to charge the complex in two shifts, part-time in the third shift, which should have a positive impact on the profitability of the project.
In economic terms, the payback time of the complex is calculated on the basis of the time difference obtained by comparing the welding tests. The payback period of the project is 9,8 to 14,6 years, which is quite a long period with certain risks.
In the current difficult economic situation, it is impossible to predict the volume of work in several years. And there is no guarantee, that this complex can be loaded with work for such a long time. Although this station is productive and multifunctional, there may be problems in recruiting operators. Given the specifics of the job, local workers with welding experience are preferred as operators, who simply may not want to learn anything new.
The price of this welding complex is over one million euros, and considering that the company Estanc AS has no experience with similar types of welding robots, it is worth considering a cheaper and shorter payback option.
In the above summary, it can be concluded that the goal of the dissertation has been achieved. The welding complex is suitable for Estanc AS production, but due to economic factors, the project has been postponed as an investment
Spring Graduation 2018 - Commencement 8:30am
No full textPublished on Jun 19, 2018 Commencement service for students from the Seventh-day Adventist Theological Seminary and School of Education. Dr. Vonda Douglas-Nikitin, member of the Andrews University Board of Trustees presented the address titled: The Time Is Now Calvin B. Rock, retired general vice president for General Conference of Seventh-day Adventists, pastor, and author received an honorary degree.https://digitalcommons.andrews.edu/auvideo/1011/thumbnail.jp
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