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Dissertations / Theses on the topic 'Radost'
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1
Rohanová, Lucie. "Consolatio vacui/Radost z prázdna." Master's thesis, Vysoké učení technické v Brně. Fakulta výtvarných umění, 2012. http://www.nusl.cz/ntk/nusl-232337.
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Consolatio vacui (joy, deligt, consolation of void) is a conceptual piece exploring the idea of void and emptiness in contrast to the concept „horror vacui,“ which is wide-spread in the subconsciousness of the west culture. The piece deals with void as a field of possibilities, as a space without which there were no particular things. These questions are examined first in general, then in the field of objects and eventually in the specific field of book, asking the questions of ways and effects of communication, relationship of sign and void, purpose of empty space in the book (and in general). The piece consists of 24 books, 99 mostly empty pages each, which symbolizes the wide field of possible consideration of the issues solved in each book on one or a few pages. The 24th book is a summary of all the ideas with commentary.
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Heclová, Hana. "Návrh webové prezentace a informačního systému pro Penzion Radost." Master's thesis, Vysoké učení technické v Brně. Fakulta podnikatelská, 2015. http://www.nusl.cz/ntk/nusl-225259.
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This thesis deals with creating a draft website and information system for the Pension Radost and its realization. Defines theoretical basis necessary for the creation of websites and information systems, analyzes the current status and requirements. The work also includes a survey. Based on the findings and proposal requirements are designed website and information system and their evaluation in terms of time and cost.
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Olivová, Kateřina. "Radost je cesta domů. Mohla bych i plakat, kdybych opravdu chtěla." Master's thesis, Vysoké učení technické v Brně. Fakulta výtvarných umění, 2012. http://www.nusl.cz/ntk/nusl-232341.
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Adamová, Sofia. "Herec a improvizace." Master's thesis, Akademie múzických umění v Praze.Divadelní fakulta. Knihovna, 2014. http://www.nusl.cz/ntk/nusl-202446.
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The subject of this thesis is to assess a theatrical improvisation and to
present it from many different points of view. It contains a
cmprehensive description of improvisation and it is also presented as a
specific way of thinking and acting. An The act of dramatical
improvisation is also shown as one of the posibilities how to invent a
concrete dramatic character.
It also analyze some of its components which includes fear,
happyness, the present moment etc.
Eventually the author elaborates the issue subjectively. Therefore,
there are mainly reflected and submitted author's experiences and
thoughts.
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Pártlová, Zuzana. "Autorské herectví jako (ne)výchova k osobnosti." Doctoral thesis, Akademie múzických umění v Praze.Divadelní fakulta. Knihovna, 2018. http://www.nusl.cz/ntk/nusl-391705.
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This doctoral thesis explores the potential of authorial acting as a tool for open-ended
self-education. It focuses on the properties and the process of acquiring psychosomatic
capacity for presentation in front of an audience as a means of self-discovery and
self-realization through play (Dialogical Acting with the Inner Partner) and other
preparatory psychosomatic drama disciplines. The secondary subject of this thesis is
the relevance of this capacity to teachers and educators.
In the theoretical section, I present the essential terms and concepts as well as the
basis of my research. I explain why I use the expression "(non)education towards a
self” rather than "personal education” and how one's holistic and creative conditioning
relates to the skills of a pedagogue or educator in the broadest sense of the word. The
qualitative research section consists of three parts which correspond to three research
projects. The first part explores the "personal trajectories" of students of the two-year
“Creative Pedagogy-Pedagogical Condition” (CP-PC) study program. The exploration is
based on written reflections and a two-day encounter devoted to discussion and
creative work. The encounter involved practical workshops as well as talks with
I. Vyskočil and E. Vyskočilová and student discussions. The aim was to explore the
development of the individual psychosomatic “fitness" by means that go beyond
written subjective reflections and offer live confrontations with oneself and others in
workshops and discussions. The second part focuses on the issue of authenticity and
the triple actor-viewer-assistant relation. Using simultaneous recording with two
cameras and focus groups, we tried to analyze the moments of spontaneity during the
experimentation and to identify the essential features of authentic expression.
The themes that significantly emerged from the research were the theme of inner and
outer spectator and of body resonance and joy as main characteristics of authentic
presence.
In the third section, I followed up on the findings of the previous sections in 16 semistructured
interviews with students of the CP-PC program as well as regular and
external students at the department. These interviews were analyzed using the
method of open coding combining two perspectives: a broader, theme-focused
perspective and a narrower, notional one.
This research reveals the complexity of tacit learning processes which, in the context of
play and psychosomatics, foster a personal evolution towards an original, creative
personality, i.e. "becoming one's self”. Simultaneously, this research attempts to define
the essential "virtues” of authentic acting and outlines the benefits of Vyskočil´s
pedagogy for education of educators.
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Buday, Ondřej. "Rozpoznávání a klasifikace emocí na základě analýzy textových zpráv." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2011. http://www.nusl.cz/ntk/nusl-219189.
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Main objective of this graduation thesis is clarification of informations about human emontions and its recognition and classification on basis of generally known methods. Among generally known methods belongs classification based on mimic and pantomimic expression basis and on voice tone basis. This graduation thesis is primary focused on human emotions recoginition and classification on text messages analysis. Specifically anger and joy. A Czech database in lemma form was crated for this method and it contains emotion functional words. It was made by translation of English emotion functional words and it is divided to emotion key words, emotion modification words and emotion phrases. Also was made special database of neutral words, which are removed from emotions classification except emotion phrases comparation. A degrees were assigned to emotion key words and phrases and this assignment was made by more people. That guarantee better objectivity of the database. Values of single emotion words and phrases might be influenced by emotion modification words, words that contains gradation, negation or punctuation. Output of this graduation thesis is application in JAVA language. That application after insertion input text message compare single words with all available databases and count resultant emotion rate for joy and anger emotions. Evaluation involve also single words, sentences and paragraphs. Application was designed in NetBeans with Swing GUI Builder.
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Robert, Lakatoš. "Primena i razvoj metoda za određivanje radona i torona u zemljištu i vazduhu radi procene radonskog potencijala." Phd thesis, Univerzitet u Novom Sadu, Prirodno-matematički fakultet u Novom Sadu, 2019. https://www.cris.uns.ac.rs/record.jsf?recordId=110569&source=NDLTD&language=en.
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U okviru ove disertacije razvijena je i verifikovana metoda za direktno merenje koncentracije toronovih potomaka u vazduhu i određivanje toronske ravnoteže. Pouzdanost i primenljivost predloženog GAMA metoda proverena je sveobuhvatnom studijom koncentracija radona, torona i svih parametara koji doprinose ovim koncentracijama na 16 različitih lokacija na području Srbije odabranih na osnovugeomorfologije terena i prethodnih merenja. Iznalaženjem najznačajnijih statističkih korelacija i primenom jedne od predloženih metoda iz korišćene naučne literature za procenu geogenog radonskog potencijala identifikovani su prediktori koji utiču na koncentraciju radona u zemljištu i vazduhu zatvorenih prostorija. Pored toga studijom slučaja u jednoj porodičnoj kući potvrđena je primenljivost i podobnost aktivnih monitora za određivanje radonske i toronske ravnoteže, praćenje varijacija, kao i neophodnost njihove primene u procesu remedijacije objekata sapovišenom koncentracijom radona.Within this dissertation, a method for the direct measurement of indoor thoron progeny concentrations and determination of the thoron equilibrium was developed and verified. The reliability and applicability of the proposed GAMA method was proved by a comprehensive study of radon, thoron and all parameters that contribute to these concentrations at 16 different locations in the territory of Serbia selected based on geomorphology of the terrain and previous measurements. Based on the most significant statistical correlations between all examined parameters and using one of the proposed methods from the literaturegeogenic radon potential was estimated with identification of the predictors which significantly affect radon concentrations in air and soil. In addition, a case study in one family house confirmed the suitability of active radon monitors for determination of the radon and thoron equilibrium, monitoring of time variations and also the necessity of their application in the remediation of objects with elevated radon.
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Suokas, T. (Tero). "Permutaatioryhmien radoista." Master's thesis, University of Oulu, 2015. http://urn.fi/URN:NBN:fi:oulu-201503141171.
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Tässä työssä johdatetaan lukija permutaatioiden maailmaan. Tarkoituksena on esitellä lukijalle permutaatioiden sekä niiden muodostaman ryhmän ominaisuuksia ja käyttömahdollisuuksia. Lopussa syvennytään tutkimaan permutaatioryhmien ratoja ja lasketaan niiden avulla joitakin esimerkkejä. Tutkielmassa on käytetty lähteinä pääasiassa I. N. Hersteinin kirjaa Abstract Algebra sekä Joseph J. Rotmanin teosta A First Course in Abstract Algebra. Tutkielman rakenne ja tulosten esitysjärjestys noudattaa pitkälti Markku Niemenmaan kurssin Algebra II luentomonistetta ja muistiinpanoja.
Työn alkuosa kertaa ryhmäteorian perustuloksia. Sen jälkeen tutustutaan permutaatioihin, permutaatioryhmiin sekä permutaatioiden merkitsemistä helpottaviin sykleihin. Ohessa tarkastellaan myös Arthur Cayleyn teoreemaa, jonka mukaan jokainen ryhmä on isomorfinen jonkin permutaatioryhmän kanssa.
Neljännessä luvussa tutkitaan permutaatioiden konjugointia ja niiden muodostamia konjugointiluokkia. Luku 5 aloitetaan määrittelemällä permutaatioille parillisuus ja myöhemmin nähdään, että parilliset permutaatiot muodostavat ryhmän, jota kutsutaan alternoivaksi ryhmäksi. Tämän jälkeen esitetään vaiheittain todistus alternoivan ryhmä yksinkertaisuudelle. Tulos on mielenkiintoinen, koska viime vuosituhannella matemaatikot ympäri maailman yhdessä luokittelivat kaikki äärelliset yksinkertaiset ryhmät, joista yksi tapaus on siis alternoivat ryhmät.
Tutkielman kuudennessa luvussa tarkastellaan permutaatioryhmien ratoja ja osoitetaan erittäin hyödyllinen ei-Burnsiden lemma, jota voidaan käyttää avuksi laskettaessa ratojen lukumääriä. Viimeinen luku käsittelee esimerkkejä ja sovelluksia permutaatioryhmien ratojen ja erityisesti ei-Burnsiden lemman käytöstä.
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Štěpánová, Lucie. "Význam Cen Alfréda Radoka a zhodnocení činnosti Nadačního fondu Cen Alfréda Radoka." Master's thesis, Vysoká škola ekonomická v Praze, 2012. http://www.nusl.cz/ntk/nusl-194136.
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The Master thesis discusses the origin, development and termination of Alfred Radok's foundation. Furthermore the thesis deals with Alfred Radok's award endowment fund, which was focusing on the presentation of Alfred Radok's award. The aim of this thesis is to assess the activities of the foundation and of the endowment fund with a special focus on issues Alfred Radok's awards ceremony during its 23-year's operation. A great benefit of the thesis is information which is not going to be accessible anymore due to the end of Alfred Radok's awards. Alfred Radok's awards were composed of two parts. First part was an anonymous dramatic competition which awards the best script of an original Czech theatre play. And the second part was awarding of a production categories. Results of the production categories were based on a theatre critic's survey. The aim was to find out how are the critics and publicists satisfied with this survey. The method of the research was qualitative investigation based on semi-structured interviews. In conclusion, the data was evaluated and interpreted.
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Kievinas, Remigijus. "Radono tūrinio aktyvumo patalpose kaitos tyrimai ir radono sąlygotos dozės gyvenamosiose patalpose įvertinimas." Master's thesis, Lithuanian Academic Libraries Network (LABT), 2009. http://vddb.library.lt/obj/LT-eLABa-0001:E.02~2009~D_20090630_094828-98467.
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Norint išvengti apšvitos nuo pavojingo žmogaus sveikatai radono ir jo skilimo produktų, reikia daugybės tyrimų, kurie nustatytų radono tūrinį aktyvumą mus supančioje aplinkoje, gyvenamosiose patalpose. Radonas patalpose atsiranda iš įvairių šaltinių: grunto, statybinių medžiagų, vandens. Radono tūrinis aktyvumas labai priklauso nuo namo konstrukcijos, vėdinimo ir nuo grunto, ant kurio jis pastatytas. Nors darbų skaičius, nagrinėjantis šią problemą, yra didelis, vienas iš faktorių, kuris sąlygoja radono tūrinius aktyvumus gyvenamojoje aplinkoje, yra regiono, kuriame radono tūrinis aktyvumas matuojamas, ypatumai – grunto sudėtis, poringumas, namo konstrukcijų tipai ir kiti. Nėra visiškai aišku, kurie iš faktorių lemia radono tūrinio aktyvumo kitimą pastatuose konkrečioje vietoje. Šio darbo tikslas – ištirti, kokį sąryšį radono tūrinis aktyvumas turi grunto ore, geriamajame vandenyje ir radono tūrinis aktyvumas patalpose, tyrimams pasirenkant palyginti nedidelį regioną – šalies pietryčiuose esančios Vilniaus apskrities Vilniaus, Šalčininkų ir Širvintų rajonus. Palyginimui naudotas radono tūrinis aktyvumas, tirtas pastatuose kituose šalies regionuose. Taip pat įvertinta radono tūrinio aktyvumo kaita skirtingais metų sezonais gyvenamajame pastate, kiek aktyvumui įtakos daro grunto pralaidumas ir namo sandarinimo ypatybės.Indoor radon is most important expose for human population. It is necessary to investigate reasons of increasing of radon concentration. It is known that radon concentrations are highly variable within a region. This work deals with the investigations of indoor radon and radon in water in dwellings of Vilnius region. Measurements of radon in soil ware performed as well. Measurements were made at 22 private dwellings and surrounding off them in 2008 year. Statistically estimated that this region is not different from others Lithuanian districts. Effective dose for public due to indoor radon and radon in water were estimated. Results showed that the highest effective dose due to the indoor radon for public in Vilnius region is 2.1 mSv per year, highest effective dose due to radon in drinking water 5.7 μSv per year. No correlation funded between radon in soil and indoor radon in may investigation. So there are other factors that influence increase of radon concentration in buildings: engineering barrier, air conditions and others. Variation of indoor radon concentrations in a dwelling survey has been carried out in Panevezys districts in the village of Pinava. Indoor radon levels were measured in selected dwelling in autumn, winter, spring and summer seasons using radon monitor AlphaGuard. The average radon concentrations vary from 52 Bq/m3 in summer to 289 Bq/m3 in winter. Relation between first and second flour was estimated, its shows that radon concentrations on first flour... [to full text]
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Willenius, Ann-Christin. "Radon i flerbostadshus : Kartläggning av fastighetsförvaltarnas egenkontroll avseende radon." Thesis, Mälardalen University, School of Sustainable Development of Society and Technology, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-9955.
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Radon is a hazardous substance that cannot be perceived by our senses. It has long been known that exposure to high radon levels for a long period of time will ultimately cause lung cancer. The Swedish Radiation Safety Authority estimates that 500 people die annually due to this. Although most of them are smokers, even non-smokers suffer from lung cancer caused by radon. The statutory value for radon in homes today is 200 Bq/m³. Several years of research points to the fact that 63% of all those who develop lung cancer have been exposed to radon levels between 100-200 Bq/m³. This is why the WHO has lowered the recommended value to 100 Bq/m³, and The Radiation Safety Authority of Sweden also has the same recommendation today. This study has been rendered to the Municipality of Eskilstuna, and its environmental and emergency management. The study has identified 72 % of the rental properties for radon measurements and action through personal visits to 14 large and medium-sized property managers in Eskilstuna. Several conclusions can be made from the study. Generally, very few measurements have been made and these have shown 6 % of high radon levels. The various property managers are at very different levels regarding their work with radon and there are very big differences amongst them as regards giving priority to the issue with radon. In 2020, the Swedish parliament has decided that no one should be exposed to radon levels above 200 Bq/m³ in their homes. Today there is legislation that applies against radon in apartment buildings as well as effective methods to reduce radon levels. However, the problem is instead the fact that there is a lack of resources at hand for the public health inspectors. Consequently, it seems rather impossible achieving the goal set for 2020. Thus it is of utmost interest to highlight this problem for the politicians that ultimately set the budget for the services in the municipality.
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Golightly, John. "Characterization of a carbon radon filter and Radon detection." Thesis, Kingston, Ont. : [s.n.], 2008. http://hdl.handle.net/1974/1397.
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Kataria, Amit. "Cognitive radios spectrum sensing issues /." Diss., Columbia, Mo. : University of Missouri-Columbia, 2007. http://hdl.handle.net/10355/5047.
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Thesis (M.S.)--University of Missouri-Columbia, 2007.The entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file. Title from title screen of research.pdf file (viewed on March 28, 2008) Includes bibliographical references.
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Sharma, Gaurav. "Adaptive modulation for cognitive radios." Diss., Rolla, Mo. : University of Missouri--Rolla i.e. [Missouri University of Science and Technology], 2008. http://scholarsmine.mst.edu/thesis/pdf/Sharma_09007dcc8046bf0b.pdf.
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Thesis (M.S.)--Missouri University of Science and Technology, 2008.Vita. The entire thesis text is included in file. Title from title screen of thesis/dissertation PDF file (viewed February 13, 2008) Degree granted by Missouri University of Science and Technology, formerly known as University of Missouri--Rolla. Includes bibliographical references (p. 44-45).
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Guidotti, Alessandro <1983>. "Spectrum Management and Cognitive Radios." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2012. http://amsdottorato.unibo.it/4335/.
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The ever increasing demand for new services from users who want high-quality broadband services while on the move, is straining the efficiency of current spectrum allocation paradigms, leading to an overall feeling of spectrum scarcity. In order to circumvent this problem, two possible solutions are being investigated: (i) implementing new technologies capable of accessing the temporarily/locally unused bands, without interfering with the licensed services, like Cognitive Radios; (ii) release some spectrum bands thanks to new services providing higher spectral efficiency, e.g., DVB-T, and allocate them to new wireless systems. These two approaches are promising, but also pose novel coexistence and interference management challenges to deal with. In particular, the deployment of devices such as Cognitive Radio, characterized by the inherent unplanned, irregular and random locations of the network nodes, require advanced mathematical techniques in order to explicitly model their spatial distribution. In such context, the system performance and optimization are strongly dependent on this spatial configuration. On the other hand, allocating some released spectrum bands to other wireless services poses severe coexistence issues with all the pre-existing services on the same or adjacent spectrum bands.
In this thesis, these methodologies for better spectrum usage are investigated. In particular, using Stochastic Geometry theory, a novel mathematical framework is introduced for cognitive networks, providing a closed-form expression for coverage probability and a single-integral form for average downlink rate and Average Symbol Error Probability. Then, focusing on more regulatory aspects, interference challenges between DVB-T and LTE systems are analysed proposing a versatile methodology for their proper coexistence. Moreover, the studies performed inside the CEPT SE43 working group on the amount of spectrum potentially available to Cognitive Radios and an analysis of the Hidden Node problem are provided. Finally, a study on the extension of cognitive technologies to Hybrid Satellite Terrestrial Systems is proposed.
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Rivadeneyra, Carlos. "Las radios en el Perú." Canalé, 2017. http://repositorio.pucp.edu.pe/index/handle/123456789/114080.
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La radio peruana revela una enorme diversidad, la que está en proporción directa con su multiculturalidad. Ambas características descubren un proceso en el que diversos actores sociales despliegan sus marcadas influencias y configuran un escenario complejo, pleno de oportunidades y retos. Más allá de la gran radio comercial capitalina están las otras radios: pequeñas empresas, provincianas, las pertenecientes a la iglesia o a los alcaldes e inclusive a micro empresarios, hijos de la melomanía folklórica. Las múltiples motivaciones producen un panorama con muchos tipos de radio que es preciso comenzar a conocer.
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Lásková, Petra. "Dramatická soutěž Cen Alfréda Radoka." Master's thesis, Akademie múzických umění v Praze.Divadelní fakulta. Knihovna, 2015. http://www.nusl.cz/ntk/nusl-202964.
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This master thesis introduces the origins of the Alfréd Radok Awards Foundation and briefly explains evolution of the contest the Foundation has run for the past twenty two years. It focuses mainly on the Alfréd Radok Awards Drama Contest which introduced the best original and unperformed Czech or Slovakian plays.
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Kaminski, Nicholas James. "Performance Evaluation of Cognitive Radios." Thesis, Virginia Tech, 2012. http://hdl.handle.net/10919/32092.
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This thesis presents a performance evaluation system for cognitive radio. It considers per-
formance as a complex, multi-dimensional function. Typically such a function would take
some record of actions as an argument; however, a key contribution of this work is the
addition of background information to the domain of the performance function. Including
this information generalizes the performance function across many radios and applications,
with the additional cost of complicating the domain. Thus the presented evaluation system
organizes the domain information into sets. These sets are divided into two categories, one
capturing necessary information that is external to the radio and on capturing necessary
information that internal to the radio. These categories highlight the fact that neither the
true actions nor the true performance is directly observable at the onset of evaluation. This
arises because a cognitive radio can only express its actions in terms of the available knobs
and meters, which together form the radioâ s language. Some understanding of this language
and its limitations is required to fully understand the radioâ s expression of its actions. This
parallelism of actions and performance suggests implementing the evaluation method as a
composite form of the performance function. The composite performance function is made
up of two sub-functions, one of which producing action information and one of which pro-
ducing performance information. Specifically, the first sub-function is used to determine
general measures of the actionsâ influence on performance; these are labeled Measures of Effectiveness. The second sub-function uses these Measures of Effectiveness to determine
application specific performance values, called Measures of Performance. This work covers
both these measures in detail. Each measure is determined as the result of a neural network
based interpolation. This thesis also provides an examination of artificial neural networks
in the scope of performance evaluation. Once these concepts are explored, a walk-through
evaluation is presented. The four phases are the Setup Phase, the Logging Phase, the Train-
ing Phase, and the Evaluation Phase. Each phase is structured to provide the information
necessary to determine the final performance. These phases detail the process of evaluation
and discuss the realization of concepts explored earlier. This work concludes with a compar-
ative evaluation example that proves the worth of the presented approach. A full evaluation
system is outlined by this thesis and the foundational details for the system are explored in detail.Master of Science
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Kaminski, Nicholas James. "Social Intelligence for Cognitive Radios." Diss., Virginia Tech, 2014. http://hdl.handle.net/10919/25786.
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This dissertation introduces the concept of an artificial society based on the use of an action based social language combined with the behavior-based approach to the construction of multi-agent systems to address the problem of developing decentralized, self-organizing networks that dynamically fit into their environment. In the course of accomplishing this, social language is defined as an efficient method for communicating coordination information among cognitive radios inspired by natural societies. This communication method connects the radios within a network in a way that allows the network to learn in a distributed holistic manner. The behavior-based approach to developing multi-agent systems from the field of robotics provides the framework for developing these learning networks. In this approach several behaviors are used to address the multiple objectives of a cognitive radio society and then combined to achieve emergent properties and behaviors. This work presents a prototype cognitive radio society.
This society is implemented, using low complexity hardware, and evaluated. The work does not focus on the development of optimized techniques, but rather the complementary design of techniques and agents to create dynamic, decentralized self-organizing networksPh. D.
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Nono, Njepang Luidor. "Les radios communautaires au Cameroun." Thesis, Paris 2, 2012. http://www.theses.fr/2012PA020051.
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L’ouverture du secteur audiovisuel camerounais a consacré l’avancée du processus d’acquisition et de l’octroi des libertés individuelles commencé autour des années 1990. Le décret d’application d’avril 2003 a entériné une dizaine d’années plus tard, le dispositif enclenché par la loi n°90-052 du 19 décembre 1990 relative à la liberté de communication sociale. Depuis lors, organes de presse et audiovisuels se côtoient et se heurtent à des pesanteurs susceptibles de limiter leur efficacité, en tant qu’outils et moyens de communication de proximité. Leur jeunesse, les problèmes endogènes et exogènes au paysage médiatique camerounais justifierait une étude sur l’existence et la manière dont les organes de communication sociale produisent et diffusent informations et nouvelles en direction des populations ciblées. A ce sujet, la radio communautaire, tout en cherchant à les impliquer et à les faire participer à cet objectif de communication sociale, promeut par ses programmes, la propre image des populations à laquelle elle est destinée. Il ne reste qu’à garantir les modalités pratiques, les conditions nécessaires pour une participation transparente des différents acteurs à la gestion et au fonctionnement de la radio. Pour une grande part, les populations sont prêtes à soutenir les projets de radios communautaires qui s’installent dans les localités. Les différentes techniques d’appropriation et d’usage des médias permettent d’appréhender de l’extérieur les différents enjeux qui se tissent. Elles permettent d’observer les pratiques mises en place et les conditions d’engagement des acteurs sociaux pour garantir, une longue vie à la radioThe opening of the Cameroonian audiovisual sector dedicated the overhang of the process of acquisition and the granting of the personal freedoms begun around 1990s. The application decree of April, 2003 confirmed a decade later, the plan engaged by the law 90/052 of December 19th, 1990 relative to the freedom of social communication. Since then, newspapers and broadcasting mix and come up against gravities susceptible to limit their efficiency, as tools and means of communication of nearness. Their youth, the endogenous and exogenous problems in the Cameroonian media landscape justify a study on the existence and the way the organs of social communication produce and broadcast information and news in the direction of the targeted populations. For this subject, the community radio, while trying to imply them and to make them participate in this objective of social communication, promotes by its programs, the own image of the populations for which is intended. It remains only to guarantee the practical methods, the necessary conditions for a transparent participation of the various actors in the management and in the functioning of the radio. Mostly, the populations are ready of supporting the projects of community radios which settle down in villages. The various techniques of appropriation and uses of the media allow dreading from the outside the various stakes which weave. They allow observing the organized practices and the conditions of commitment of the civil society to guarantee, a long life on the radio
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Jia, Di, and 賈地. "A radon chamber and its role in a radon survey." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1992. http://hub.hku.hk/bib/B31210818.
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Jia, Di. "A radon chamber and its role in a radon survey /." [Hong Kong : University of Hong Kong], 1992. http://sunzi.lib.hku.hk/hkuto/record.jsp?B13385379.
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Karollil, Anoop. "RadFS - virtualizing filesystems." Thesis, University of British Columbia, 2008. http://hdl.handle.net/2429/5749.
Full textAbstract:
Efficient disk space usage and quick deployment are important storage mechanism
requirements in a virtualized environment. In a virtual machine farm, there is good
potential for saving disk space as virtual machines are based off file system images
that usually have a lot in common. Deploying virtual machines on demand should
also be as quick as possible - close to or faster than the time taken in powering on
and booting up a real machine.
We introduce RadFS, a shared root filesystem for virtual machines based on
copy-on-write semantics. Creating a new root file system for deploying a virtual
machine is instantaneous, with the ability to base the new file system on the clone
of a previous file system or a snapshot of an existing file system. Disk space us
age efficiency is guaranteed initially by the COW semantics and later by transparent
file-system ‘merges’ based on content hashing. Thus any file that is identical
among the file systems of the various virtual machines hosted off our file system
will be shared which leads to large savings in disk space with increased provisioning
of virtual machines running similar operating systems or applications that
use similar sets of files. Live instantaneous snapshots of existing file systems also
ensure easy backups or new bases for other virtual machines.
The filesystem or name space virtualization is implemented in user-space using
FUSE and backed by a content hashing module to take care of merges.
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Pinto, Junior Dorival Leão. "Espaços de Radon." [s.n.], 1999. http://repositorio.unicamp.br/jspui/handle/REPOSIP/260978.
Full textAbstract:
Orientadores: Marcelo Dutra Fragoso, João Bosco Ribeiro do ValTese (doutorado) - Universidade Estadual de Campinas, Faculdade de Engenharia Eletrica e de Computação
Made available in DSpace on 2018-07-25T22:55:58Z (GMT). No. of bitstreams: 1 PintoJunior_DorivalLeao_D.pdf: 5643732 bytes, checksum: c5a4b61a72264e2ac9ae48bdf0697bf0 (MD5) Previous issue date: 1999
Resumo: Assumindo apenas hipóteses sobre o espaço amostral 'ômega¿ e a 'sigma¿-álgebra F associada, vamos caracterizar a classe mais geral de espaços mensuráveis ('ômega¿, F), tal que para toda probabilidade P sobre ('ômega¿, F),o espaço de probabilidade ('ômega¿, F, P): a. Admite Probabilidade Condicional Regular; b. é Compacto no sentido de Marczewski (1954); c. é Perfeito no sentido de Gnedenko e Kolmogorov (1949); d. é Lebesgue no sentido de Rohlin (1949); entre outras equivalências apresentadas nesta tese... Observação: O resumo, na íntegra, poderá ser visualizado no texto completo da tese digital
Abstract: Assuming hypothesis only on the measurable space ('ômega¿, F) we characterize the most general class of measurable spaces, that for all probability P on ('ômega¿, F), the probability space ('ômega¿, F, P): a. admits regular conditional probability; b. is compact in the Marczewski (1954) sense; c. is perfect in the Gnedenko and Kolmogorov (1949) sense; d. is Lebesgue in the Rohlin (1949) sense; among others equvialences established in this thesis... Note: The complete abstract is available with the full electronic digital thesis or dissertations
Doutorado
Doutor em Engenharia Elétrica
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Faessel, Nicole. "Contribution à l'étude des radios locales privées en France : l'expérience des radios locales privées en Lorraine." Nancy 2, 1987. http://www.theses.fr/1987NAN20002.
Full textAbstract:
Cette these est consacree a l'etude de l'application, en lorraine, des lois concernant les radios locales privees. Emettant en marge du monopole etatique, dans l'anarchie la plus complete, les stations dites "libres", puis "locales privees", ne furent reconnues qu'apres l'election presidentielle de 1981 et la designation d'un gouvernement a majorite socialiste. Les obligations diverses qui pesaient sur elles (techniques ou de programme) les accablaient de difficultes financieres. Une fois autorisees par la haute autorite de la communication audiovisuelle, elles recurent des subventions par le canal d'un fonds de soutien a l'expression radiophonique locale, cree a cet effet. La publicite leur etant legalement interdite, elles imaginerent, pour survivre, divers moyens de financement propre. La loi du 1er aout 1984 finit pourtant par leur accorder le droit a la publicite, a condition qu'elles se constituent en petites et moyennes entreprises. Mais le secteur associatif continuait d'exister et, face a un vide juridique, une troisieme categorie naquit, de type mi-associatif, mi-commercial. L'election en mars 1986, d'une assemblee nationale a majorite de droite (udf rpr), entraina le vote, le 30 septembre 1986, de la loi leotard. Celle-ci, entre autres, remplace la haute autorite par la commission nationale de la communication et des libertes. La volonte d'organiser la liberte de la communication audiovisuelle continue neanmoins de se heurter a une difficulte fondamentale : comment concilier la liberte des stations emettrices avec celle des auditeurs qui ont droit au "confort d'ecoute" maximal, "materiel et moral" ?This thesis is a study on the application in lorraine of the laws concerning private local radios. After having broadcasting in parallel to the state monopoly, and this in total anarchy, the so-called "free" radio stations were legally acknowledged only after the presidential elections of 1981, when a government with a socialist majority was appointed. The diverse obligations that they were imposed (either technical or concerning their programs) overwhelmed them with financial difficulties. As soon as the haute autorite (high authorities) of audiovisual communications authorized it, they received subsidies through the fonds de soutien a l'expression radiophonique locale (support funds for local radio expression) that was created to this effect. Advertising was legally forbidden, so they found different ways to finance themselves in order to survive. The law passed the 1st of august 1984 finnaly accorded them the right to advertise, but only if they set themselves up in small or average sized fims. But the partnership sector continued to exist, and, in the face of this legal emptiness, a third category devleopped, part-partnership, part-firm. The election in march 1986 of an assemblee nationale (national parliament) with a reght-wing majority (udf rpr) saw through the voting on the 30 th of september 1986 of the leotard law. Amongst other things, it replaced the haute autorite by the commission nationale de la communication et des libertes (national communication and rights commission). The will to organize the freedom of audiovisual communication still comes up against a fundamental difficulty : how to reconcile the freedom of the broadcasting stations with the freedom of the listeners, who have a right to maximum "listening comfort", both "materially and morally" ?
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Uthus, Kristen Lynn. "The potential for introgression of cultivated radish (Raphanus sativus) alleles into wild radish (R. raphanistrum) populations /." The Ohio State University, 2001. http://rave.ohiolink.edu/etdc/view?acc_num=osu1486401895208824.
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Raghavan, Anand. "Interference cancellation for collocated wireless radios." Diss., Available online, Georgia Institute of Technology, 2007, 2007. http://etd.gatech.edu/theses/available/etd-06272007-234911/.
Full textAbstract:
Thesis (Ph. D.)--Electrical and Computer Engineering, Georgia Institute of Technology, 2008.Laskar, Joy, Committee Chair ; Cressler, John, Committee Member ; Kornegay, Kevin, Committee Member ; Tentzeris, Emmanouil, Committee Member ; Lee, Chang-Ho, Committee Member.
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Kean, Simon Ralph. "Acoustics of hand portable mobile radios." Thesis, University of Canterbury. Department of Mechanical Engineering, 2005. http://hdl.handle.net/10092/2219.
Full textAbstract:
The aim of the project was to investigate the acoustics of hand portable radios identifying key
parameters contributing to their performance and from these findings develop a design guide.
A systems engineering approach was taken with the project focus on internal and external
acoustic and vibration interactions.
The internal interactions investigated were between electrical and mechanical systems while
the external interactions included the influence of the user and environment on the radio
performance. The interactions provided quantitative verification of the Orca's perceived poor
audio performance and enabled a design guide to be developed to prevent the issues from
recurring.
A significant proportion of the work was experimentally based and provides methodology to
aid future analysis of other products. Commercially available software, LMS SYSNOISE, was
utilised to implement a vibro-acoustic finite and boundary element model of the radio. The
results were verified against experimental measurements. It was found that SYSNOISE was
suitable as a design tool for predicting modes and trends but was unsuccessful at predicting
the magnitude of acoustic radiation. The reason for this was attributed to difficulties in
modelling damping.
The design guide contains a design procedure and recommendations for acoustic information
management. To realise the full benefit of acoustic analysis procedures need to be
implemented to incorporate the information into mechanical design, electrical design and also
sales and marketing.
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Radolf, Stefan [Verfasser]. "Immundepression nach aneurysmatischer Subarachnoidalblutung / Stefan Radolf." Berlin : Medizinische Fakultät Charité - Universitätsmedizin Berlin, 2016. http://d-nb.info/1082537969/34.
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Dickins, Alastair Martin. "New nitrogen ceramics for radome applications." Thesis, University of Newcastle Upon Tyne, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.481632.
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Cheval, Jean-Jacques. "Les Radios locales privées en Gironde." Lille 3 : ANRT, 1988. http://catalogue.bnf.fr/ark:/12148/cb37596673c.
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Rammal, Ali. "Radios et information radiophonique au Liban." Lille 3 : ANRT, 1988. http://catalogue.bnf.fr/ark:/12148/cb376178830.
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Cheval, Jean-Jacques. "Les radios locales privées en Gironde." Bordeaux 3, 1986. http://www.theses.fr/1986BOR30038.
Full textAbstract:
Les experiences de radios libres peu nombreuses en gironde sont pourtant a l'origine d'un mouvement plus vaste qui donne naissance a plusieurs dizaine de radios dont 44 seront autorisees legalement a emettre entre 1983 et 1986; elles prennent alors l'appellation de radios locales privees. Elles concernent en gironde, plus de 1500 personnes en 1984. Le developpement de ces radios en gironde, comme au niveau national, se fait dans un cadre legislatif remanie a diverses reprises mais n'est pas applique. Le phenomene social marginal et contestataire des radios libres marque par sa forte anomie retrouve rapidement ses propres lois de regulation qui sont essentiellement economiques. L'autorisation faite aux radios de recourir au financement publicitaire accelere le processus. Aux experiences de radios associatives succedent les experiences de radios commerciales avec une tres nette tendance a la concentration par la prise du controle des radios dans des reseaux nationaux. Les radios locales privees s'organisent egalement par rapport a la presse locale et aux municipalites. L'information locale est traitee par un nombre restreint de radios. Les programmes a l'origine generalistes ou thematiques et communautaires deviennent de plus en plus musicaux centres sur un public jeune. Les radios locales privees obtiennent une audience consequente en gironde qui s'evalue a environ un tiers de l'auditoire global de la radio. L'examen du cas girondin en matiere de radios locales privees presente peu d'originalite mais permet de mieux comprendre leur histoire en franceThe experiences of the few "free radios" in gironde are however at the beginning of a largest movement which gives rise to several tens of radios from which 44 will be legaly authorized to emit between 1983 and 1986; then they take name of " prived local radios". They concern in gironde more than 1500 persons in 1984. The development of these radios in gironde, as at the national level, is done in a legislative context altered on several occasion but which is not used. The social phenomenon, marginal and claimant of the "free radios" offering an anarchic character rediscovers quickly its proper laws of regulation which are essentially economics. The authorisation for the radios to have recourse to advertising's financing accelerates the process. At the experiences of associatives radios succeed the experiences of business radios with a very clear tendancy at the concentration by the integration of the radios in national networks. The prived local radios get also settle with regard to the local press and to the local administrative areas. The local information is treated by a limited number of radios. At the begining, the programms either generals or thematics and for community become more and more musicals for a young public. The local prived radios get a consistent hearing in gironde wich is estimated at one third of the total audience of the radio. The investigation of the girondin's case concerning prived local radios present little originality but allows to better understand their history in france
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Dramé, Seydou. "Les radios locales au Burkina Faso." Paris 2, 2007. http://www.theses.fr/2007PA020014.
Full textAbstract:
Cette thèse présente le fonctionnement actuel des radios locales au Burkina Faso, le processus de création de ces médias de proximité, leur historique et les problèmes vécus par leurs promoteurs et les stations elles-mêmes, les radios locales sont étudiées comme des outils de développement et d'épanouissement des populations locales, surtout rurales
35
Silva, Nelson José Valente da. "Reconfigurable transmitters for software-defined radios." Doctoral thesis, Universidade de Aveiro, 2013. http://hdl.handle.net/10773/11788.
Full textAbstract:
Doutoramento em Engenharia ElectrotécnicaFlexible radio transmitters based on the Software-Defined Radio (SDR) concept are gaining an increased research importance due to the unparalleled proliferation of new wireless standards operating at different frequencies, using dissimilar coding and modulation schemes, and targeted for different ends. In this new wireless communications paradigm, the physical layer of the radio transmitter must be able to support the simultaneous transmission of multi-band, multi-rate, multi-standard signals, which in practice is very hard or very inefficient to implement using conventional approaches. Nevertheless, the last developments in this field include novel all-digital transmitter architectures where the radio datapath is digital from the baseband up to the RF stage. Such concept has inherent high flexibility and poses an important step towards the development of SDR-based transmitters. However, the truth is that implementing such radio for a real world communications scenario is a challenging task, where a few key limitations are still preventing a wider adoption of this concept. This thesis aims exactly to address some of these limitations by proposing and implementing innovative all-digital transmitter architectures with inherent higher flexibility and integration, and where improving important figures of merit, such as coding efficiency, signal-to-noise ratio, usable bandwidth and in-band and out-of-band noise will also be addressed. In the first part of this thesis, the concept of transmitting RF data using an entirely digital approach based on pulsed modulation is introduced. A comparison between several implementation technologies is also presented, allowing to state that FPGAs provide an interesting compromise between performance, power efficiency and flexibility, thus making them an interesting choice as an enabling technology for pulse-based all-digital transmitters. Following this discussion, the fundamental concepts inherent to pulsed modulators, its key advantages, main limitations and typical enhancements suitable for all-digital transmitters are also presented. The recent advances regarding the two most common classes of pulse modulated transmitters, namely the RF and the baseband-level are introduced, along with several examples of state-of-the-art architectures found on the literature. The core of this dissertation containing the main developments achieved during this PhD work is then presented and discussed. The first key contribution to the state-of-the-art presented here consists in the development of a novel ΣΔ-based all-digital transmitter architecture capable of multiband and multi-standard data transmission in a very flexible and integrated way, where the pulsed RF output operating in the microwave frequency range is generated inside a single FPGA device. A fundamental contribution regarding the simultaneous transmission of multiple RF signals is then introduced by presenting and describing novel all-digital transmitter architectures that take advantage of multi-gigabit data serializers available on current high-end FPGAs in order to transmit in a time-interleaved approach multiple independent RF carriers. Further improvements in this design approach allowed to provide a two-stage up-conversion transmitter architecture enabling the fine frequency tuning of concurrent multichannel multi-standard signals. Finally, further improvements regarding two key limitations inherent to current all-digital transmitter approaches are then addressed, namely the poor coding efficiency and the combined high quality factor and tunability requirements of the RF output filter. The followed design approach based on poliphase multipath circuits allowed to create a new FPGA-embedded agile transmitter architecture that significantly improves important figures of merit, such as coding efficiency and SNR, while maintains the high flexibility that is required for supporting multichannel multimode data transmission.
Transmissores de rádio flexíveis baseados no conceito do Rádio Definido por Software (SDR) estão a receber uma crescente importância de investigação essencialmente devido à proliferação sem precedentes de novos standards de comunicações wireless que trabalham em frequências diferentes, usando esquemas de modulação e codificação dissimilares, estando direcionados para os mais diversos fins. Neste novo paradigma de comunicações wireless, a camada física do transmissor rádio tem de ser capaz de suportar a transmissão simultânea de sinais provenientes de diferentes standards, operando em diferentes bandas de frequências e com diferentes ritmos de transmissão, o que na prática é muito difícil ou muito ineficiente de implementar utilizando abordagens convencionais. Contudo, os últimos desenvolvimentos nesta área incluem novas arquiteturas de transmissão inteiramente digitais onde o datapath do rádio é digital desde a banda base até ao RF. Tal conceito tem uma elevada flexibilidade e representa um passo importante para o desenvolvimento de transmissores baseados em SDR. No entanto, a implementação de tal rádio para cenários de comunicação reais é uma tarefa desafiadora, onde algumas limitações chave estão ainda impedindo uma maior adopção deste conceito. Esta tese tem como principal objetivo o de investigar algumas destas limitações, propondo e implementando arquiteturas inovadoras de transmissão inteiramente digitais com inerente elevada flexibilidade e integração, e onde melhorar importantes figuras de mérito, tais como a eficiência de codificação, a relação sinal-ruído, a largura de banda utilizável e o ruído dentro e fora da banda também serão abordadas. Na primeira parte deste trabalho é introduzido o conceito de transmissão de dados RF utilizando uma abordagem totalmente digital, baseada em modulação por impulsos. Uma comparação entre diversas tecnologias de implementação é também apresentada, permitindo afirmar que as FPGAs actuais oferecem um compromisso interessante entre desempenho, eficiência de energia e flexibilidade, tornando-as uma escolha interessante como uma tecnologia de implementação com elevado potencial para transmissores completamente digitais baseados em moduladores pulsados. Após esta discussão são apresentados os conceitos fundamentais inerentes aos moduladores pulsados e introduzidos os avanços relativos a transmissores RF modulados por pulsos, juntamente com vários exemplos de arquiteturas do estado da arte encontrados na literatura. Em seguida, o núcleo desta tese contendo os principais desenvolvimentos alcançados durante este trabalho de doutoramento é apresentado e discutido. O primeiro contributo fundamental para o estado da arte aqui apresentado consiste no desenvolvimento e integração em FPGA de uma nova arquitetura de transmissão inteiramente digital, baseada em moduladores ΣΔ e dotada de uma elevada flexibilidade e integração, sendo capaz de transmitir dados de multiplos standards e em multiplas bandas de RF. Uma segunda contribuição chave relativa à transmissão simultânea de vários sinais RF é então introduzida, sendo apresentadas e descritas novas arquiteturas de transmissão de sinal RF inteiramente digitais, as quais tiram proveito de serializadores de dados multi-gigabit disponíveis em FPGAs atuais de alto desempenho. Melhorias adicionais a esta abordagem permitiram desenvolver uma arquitetura de transmissão com duas fases de conversão na frequência, a qual permite a transmissão concorrente de sinais multistandard e multicanal com ajuste fino na frequência. Por ultimo, foram ainda investigadas diversas técnicas que visam reduzir duas limitações fundamentais inerentes aos actuais transmissores completamente digitais, nomeadamente, a baixa eficiência de codificação dos moduladores pulsados e o elevado fator de qualidade combinado com elevados requisitos de adaptabilidade na frequencia do filtro de reconstrução do sinal RF a transmitir. A abordagem seguida baseada em multiplos caminhos polifásicos permitiu desenvolver uma nova arquitetura de transmissão integrada em FPGA que melhora de forma significativa importantes figuras de mérito, tais como a eficiência de codificação e SNR, enquanto mantém a elevada flexibilidade que é necessária para suportar a transmissão de dados multimodo e multicanal.
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Deshpande, Amol Anant. "Policy Reasoning for Spectrum Agile Radios." Thesis, Virginia Tech, 2010. http://hdl.handle.net/10919/32396.
Full textAbstract:
DARPAâ s neXt Generation (XG) communication program proposes the use of Dynamic Spectrum
Access (DSA) wherein intelligent radios can realize opportunistic usage of frequency
bands by identifying the under-utilized spectrum and reasoning about it. Implementing such
a flexible scheme requires changes in the current static spectrum management approach. As
a result, declarative spectrum management through policy-based dynamic spectrum access
has garnered significant attention recently.
Policy-based dynamic spectrum access decouples the Spectrum Access Policies and Policy
Processing Components from the Radio Platform. The Policies define conditions under which
the radios are allowed to transmit in terms of frequencies used, geographic locations, time etc.
The Policy Processing Components include a reasoning engine called the Policy Reasoner,
which is responsible for enforcing these policies.
This thesis describes the design and implementation of a novel policy reasoner called Bi-
nary Decision Diagram based Reasoner for processing Spectrum Access Policies (BRESAP).
BRESAP processes spectrum policies efficiently by reframing the policy reasoning problem
as a graph based Boolean function manipulation problem. BRESAP uses Binary Decision
Diagrams (BDDs) to represent, analyze and process the policies. It uses a set of efficient
graph-theoretic algorithms to merge these policies into a single meta-policy and compute
opportunity constraints.
Our policy reasoner has the capability to respond to invalid and under-specified transmission
requests sent by the System Strategy Reasoner (SSR). In case of invalid or under-specified
transmission requests, BRESAP returns a set of opportunity constraints which inform the
SSR of the changes needed to the transmission parameters in order to make them conform
to the policies. We also propose three algorithms for computing the opportunity constraints.
The complexity of the first algorithm is proportional to the number of variables in the metapolicy
BDD, while the complexities of the second and third algorithms are proportional to
sum of number of variables and the size (i.e., number of nodes) of the meta-policy BDD.Master of Science
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Newton, Todd A., M. Wayne Timme, and Ben A. Abbott. "EXPLORING MESH NETWORKS WITH INET RADIOS." International Foundation for Telemetering, 2016. http://hdl.handle.net/10150/624229.
Full textAbstract:
The integrated Network Enhanced Telemetry (iNET) radios provide a two-way telemetry link
that interconnects the airborne instrumentation system with ground-based systems. This
capability brings the flight test telemetry domain into the realm of the more classic mesh
networks in a mobile ad-hoc environment. The underlying radio frequency (RF) communication
protocols defined in the iNET standards support a variety of classic networking protocols. The
scheduling algorithms between Link Managers and radios can operate as a collision network, like
classic Ethernet. This paper describes the communication protocols and scheduling algorithms
of the iNET radios, and it provides results of their use in a self-scheduling algorithm such as a
classical token ring network.
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Lessinnes, Mathieu. "Resource allocation for cooperative cognitive radios." Doctoral thesis, Universite Libre de Bruxelles, 2014. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/209352.
Full textAbstract:
Resource allocation consists in allocating spectrum and power on every link of a network, possibly under power and rate requirements. In the context of cognitive radios, almost 15 years of research produced an impressive amount of theoretical contributions, exploring a wide range of possibilities. However, despite the ever-growing list of imaginable scenarios, we observe in Chapter 2 that most of these studies are based on similar working hypotheses. Our first contribution is to challenge some of these hypotheses, and propose a novel resource allocation scheme. Sticking to realistic assumptions, we show how our scheme reduces both computational complexity and control traffic, compared to other state-of-the-art techniques.Due to a majority of the abovementioned studies making some constraining assumptions, realistic system designs and experimental demonstrations are much more quiet and unharvested fields. In an effort to help this transition from theory to practice, our second contribution is a four-nodes cognitive network demonstrator, presented in Chapter 3. In particular, we aim at providing a modular platform available for further open collaboration: different options for spectrum sensing, resource allocation, synchronisation and others can be experimented on this demonstrator. As an example, we develop a simple protocol to show that our proposed resource allocation scheme is fully implementable, and that primary users can be avoided using our approach.
Chapter 4 aims at removing another working hypothesis made when developping our resource allocation scheme. Indeed, resource alloca- tion is traditionally a Media Access Control (MAC) layer problem. This means that when solving a resource allocation problem in a network, the routing paths are usually assumed to be known. Conversely, the routing problem, which is a network layer issue, usually assumes that the available capacities on each link of the network (which depend on resource allocation) are known. Nevertheless, these two problems are mathematically entangled, and a cross-layer allocation strategy can best decoupled approaches in several ways, as we discuss in Chapter 4. Accordingly, our third and last contribution is to develop such a cross-layer allocation scheme for the scenario proposed in previous chapters.
All conclusions are summarised in Chapter 5, which also points to a few tracks for future research.
Doctorat en Sciences de l'ingénieur
info:eu-repo/semantics/nonPublished
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Heidernätsch, Mario [Verfasser], Günter [Akademischer Betreuer] Radons, Günter [Gutachter] Radons, and Borczyskowski Christian [Gutachter] von. "On the diffusion in inhomogeneous systems / Mario Heidernätsch ; Gutachter: Günter Radons, Christian von Borczyskowski ; Betreuer: Günter Radons." Chemnitz : Universitätsbibliothek Chemnitz, 2015. http://d-nb.info/1213812887/34.
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Albers, Tony [Verfasser], Günter [Akademischer Betreuer] Radons, Günter [Gutachter] Radons, and Karl Heinz [Gutachter] Hoffmann. "Weak nonergodicity in anomalous diffusion processes / Tony Albers ; Gutachter: Günter Radons, Karl Heinz Hoffmann ; Betreuer: Günter Radons." Chemnitz : Universitätsbibliothek Chemnitz, 2016. http://d-nb.info/1214305571/34.
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Gehre, Nico [Verfasser], Günter [Akademischer Betreuer] Radons, Günter [Gutachter] Radons, and Karl Heinz [Akademischer Betreuer] Hoffmann. "Lösungsoperatoren für Delaysysteme und Nutzung zur Stabilitätsanalyse / Nico Gehre ; Gutachter: Günter Radons ; Günter Radons, Karl Heinz Hoffmann." Chemnitz : Technische Universität Chemnitz, 2018. http://d-nb.info/1214819168/34.
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Mvelase, Mashinga Johannes. "Radon escape from water." Thesis, University of the Western Cape, 2010. http://etd.uwc.ac.za/index.php?module=etd&action=viewtitle&id=gen8Srv25Nme4_3869_1307688700.
Full textAbstract:
This thesis aims to measure the rate of radon loss from water in a systematic way. The dependence on surface area, temperature and concentration will be investigated. The experiments were done at UWC by creating radon using radium sources and then measuring the radon concentrations inside a vacuum chamber to obtain the speed of radon escape from the water. The results are compared to a model [Cal 2002] where the radon concentration in the air and hence the transfer rate is measured using a RAD7 radon detector. Since the equations cannot be solved analytically, a numerical solution is employed. The radon transfer velocity coefficient is found to be (1.9±
0.5)×
10-6m/s. This value indicates that the escape of radon should not be a problem when a sample is open to the air for a minute or two.
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Gaskin, Janet. "Radon and Lung Cancer." Thesis, Université d'Ottawa / University of Ottawa, 2019. http://hdl.handle.net/10393/39003.
Full textAbstract:
Background: Lung cancer was the fifth leading cause of mortality globally in 2010, and the leading cause of cancer mortality in Canada, representing 26% of all cancer deaths for both men and women in 2017. Radon is a very modifiable environmental exposure that is the second most important cause of lung cancer.
Objectives: The objectives of this thesis are to quantify the lung cancer burden associated with residential radon and to identify the most cost effective mitigation options to reduce residential radon in Canada.
Methods: The global burden of lung cancer mortality attributable to radon in 2012 was estimated from the 66 countries for which a representative national radon survey was available, using several different models for excess relative risk (ERR) of lung cancer from radon studies. Cost-utility analyses are conducted for 20 practical radon interventions scenarios to reduce residential radon exposures in new and existing housing in Canada, each province/territory and 17 census metropolitan areas. A societal perspective and a lifetime horizon are adopted. A Markov cohort model and a discrete event simulation are used to model residents by household, based on a period-life table analysis, at a discount rate of 1.5%.
Results: The estimates of the global median PAR were consistent, ranging from 16.5% to 13.6% for the three ERR models based on miners, and the mean estimates of PAR for Canada ranged from 16.3% to 14.6%. It is very cost effective to install radon preventive measures in new construction compared to no radon control in all regions across Canada. At a radon mitigation threshold of 100 Bq/m3, the sequential analysis recommends the combination of the activation of preventive measures in new housing with the mitigation of existing housing at current testing and mitigation rates for cost effectiveness thresholds between 51,889 and 92,072 $/QALY for Canada, between 27,558 and 85,965 $/QALY for Manitoba, and between 15,801 and 36,547 $/QALY for the Yukon. The discounted ICER for screening and mitigation of existing housing at current rates relative to no radon control measures is 62,451 (66,421) $/QALY using a Markov cohort model (discrete event simulation model) for mitigation of housing above a threshold of 200 Bq/m3, and is 58,866 (59,556) $/QALY using a Markov cohort model (discrete event simulation model) for mitigation of housing above a threshold of 100 Bq/m3.
Conclusions: Cost effective residential radon interventions should be implemented across Canada to reduce exposures to this very modifiable cause of lung cancer and to help reduce the increasing lung cancer burden in an ageing Canadian population.
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Dabrowski, Damian. "Rectifiability of Radon measures." Doctoral thesis, Universitat Autònoma de Barcelona, 2021. http://hdl.handle.net/10803/672535.
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Aquesta tesi es dedica a l’estudi de mesures rectificables, de rectificabilitat quantitativa i, en menor grau, del límit dels operadors integrals singulars definits respecte a mesures amb creixement polinòmic.Esta tesis está dedicada al estudio de medidas rectificables, rectificabilidad cuantitativa y, en menor grado, la acotación de operadores integrales singulares definidos respecto a medidas con crecimiento polinomial.
This thesis is dedicated to the study of rectifiable measures, quantitative rectifiability, and to a lesser degree, the boundedness of singular integral operators defined with respect to measures with polynomial growth.
Universitat Autònoma de Barcelona. Programa de Doctorat en Matemàtiques
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Hung, Ling-chun. "The radioisotope unit radon analysis laboratory and its application to radon mitigation studies /." Hong Kong : University of Hong Kong, 1999. http://sunzi.lib.hku.hk/hkuto/record.jsp?B20897480.
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Hyland, Robert Quentin Thomas. "Spatial and temporal variations of radon and radon daughter concentrations within limestone caves." Thesis, University of Huddersfield, 1995. http://eprints.hud.ac.uk/id/eprint/4839/.
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This thesis outlines results from an investigation of radon and radon daughter concentrations in limestone caves, from a geographical and geological perspective Investigations were conducted at all geographical scales, ranging from a national investigation in the four major caving regions of England and Wales to a detailed survey within a single cave in the Peak District. The measured radon concentrations in some limestone caves in England and Wales are amongst the highest ever recorded in the world Significant spatial and temporal variations were recorded m concentrations at all scales, within a single cave, between caves in the same region and between different regions Additionally, seasonal and diurnal variations in concentrations were highlighted. External climatic variables and the cave radon budget were demonstrated to account for variations in cave radon concentrations Within limestone caves seven primary sources of radon were identified and the relative importance of each to the overall radon budget was determined Sediments and the contaming limestone rock were the major sources although in certain cases water and the soil were demonstrated to be influential Models were developed to predict cave radon concentrations within a single cave However, these could not be transposed to predict radon concentrations in other caves in the same region or other regions The users of limestone caves were identified, their potential exposure times were examined and legislation concerning their exposure was discussed Four groups were identified as being at risk from radon while underground, and three groups were identified as bemg at little risk Methods by which the risk from radon exposure can be reduced were examined
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Guiseppe, Vincente E. "Radon in Ground Water: A Study of the Measurement and Release of Waterborne Radon and Modeling of Radon Variation in Bedrock Wells." Fogler Library, University of Maine, 2006. http://www.library.umaine.edu/theses/pdf/GuiseppeVE2006.pdf.
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Jia, Peng. "Spectrum-sensing threshold designs for cognitive radios." Thesis, McGill University, 2011. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=97121.
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This thesis presents a study of optimal threshold designs for energy-detection based spectrum sensing in a cognitive-radio network with a pair of Primary-User (PU) transmitter-receiver and a pair of Secondary-User (SU) transmitter-receiver uniformly distributed in their corresponding transmission and interference ranges. Both large-scale path-loss and small-scale fading are considered in the wireless channel model. At first, the optimization problems under three criteria: Risk Minimization, Cost Minimization, and Capacity Maximization are formulated for SU with narrowband sensing capability. Derived under Bayesian framework, Risk Minimization threshold aims to minimize the sum of the miss detection and false alarm probabilities while Cost Minimization threshold considers minimizing the losses in PU and SU link rates due to miss detection and false alarm. On the other hand, Capacity Maximization thresholds are derived to achieve the maximum weighted sum of the PU and SU link rates. The performance of the derived optimal sensing thresholds is investigated and compared in terms of the achieved PU, SU link rates, and the sum capacity of the network for different PU transmission activity factors. Advantages of knowledge of PU and SU locations are also evaluated. Illustrative results show that SU opportunistic capacity can be obtained at the costs of some degradation in the PU link rate. In the narrowband sensing case, the Bayesian-based Risk Minimization and Cost Minimization thresholds are found to be more PU-link protective (i.e., introduce less degradation in PU link rate, especially at high PU transmission activity factor) while Capacity Maximization threshold can achieve the highest sum capacity of the network. The optimal threshold designs for narrowband sensing are further examined to include the constraint on guaranteed minimum degradation in the achieved PU rate. Under this constraint, the advantage in protecting the PU link of the Bayesian-based thresholds is no longer useful, and Capacity Maximization threshold is the better choice as it offers higher SU link rate and sum capacity. Furthermore, the study of optimum sensing thresholds for three criteria and without and with constraint is extended to consider the case of SU with wideband sensing capability along with a spectrum access algorithm, aiming at reducing the miss detection probability. Results show that, compared to the narrowband sensing, for all three criteria, the wideband sensing approach offers much better SU and PU link rates over the whole range of PU transmission activity factor and the resulting sum rate increases monotonically with the number of subcarriers. It is also confirmed that, for wideband sensing, Capacity Maximization threshold again outperforms the Bayesian-based thresholds to meet a much more stringent constraint on guaranteed PU rates while providing better SU link rates and sum rates.Ce mémoire présente une étude de la conception de seuils optimaux pour les méthodes de perception du spectre basées sur le test d'énergie dans un réseau de radio cognitive, dans lequel se trouve une paire émetteur-récepteur pour l'Utilisateur Primaire (PU) et une paire émetteur-récepteur pour l'Utilisateur Secondaire (SU) uniformément distribuées dans leurs plages de transmission et d'interférence respectives. L'affaiblissement de propagation et l'évanouissement à petite échelle sont tous deux considérés dans le modèle du canal sans fil. En premier lieu, les problèmes d'optimisation sont formulés pour le PU avec possibilité de perception du spectre en bande étroite selon trois critères: minimisation du risque, minimisation du coût et maximisation de capacité. Obtenus grâce à un cadre bayésien, le seuil de minimisation du risque cherche à minimiser la somme des probabilités de détection manquée et de fausse alerte tandis que le seuil de minimisation du coût considère les pertes de débit du PU et SU dues à la détection manquée et à la fausse alerte. En revanche, les seuils de maximisation de capacité sont dérivés pour atteindre la somme pondérée maximum de débit du PU et SU. La performance des seuils optimaux dérivés est enquêtée et comparée selon le débit atteint par le PU et SU, ainsi que la somme des débits du réseau pour différents facteurs d'activités de transmission pour le PU. Les avantages apportés par la connaissance de la localisation du SU sont aussi évalués. Les résultats illustratifs démontrent que la capacité opportuniste du SU peut être obtenue au détriment du débit du PU. Dans le cas d'écoute en bande étroite, les seuils bayésiens obtenus avec la minimisation du risque et la minimisation du coût protègent mieux le PU (i.e., introduisent moins de dégradation du débit du PU, en particulier lorsque le facteur d'activité du PU est élevé) tandis que les seuils de maximization de capacité peuvent atteindre la plus haute capacité combinée du réseau. La conception de seuils optimaux pour la perception du spectre en bande étroite est examinée d'avantage pour inclure la contrainte qui garantit la dégradation minimale du débit atteignable du PU. Avec cette contrainte, il n'est plus avantageux de protéger le lien du PU des seuils bayésiens, et le seuil de maximisation de capacité représente un meilleur choix puisqu'il offre un plus haut débit pour le SU ainsi qu'une capacité combinée augmentée. De plus, l'étude des seuils optimaux pour les trois critères, avec et sans contrainte, est étendue pour considérer le cas du SU avec possibilité de perception du spectre en bande large ainsi qu'un algorithme pour accéder au spectre, visant à réduire la probabilité de détection manquée. Les résultats démontrent que, comparée à la perception du spectre en bande étroite, la perception du spectre en bande large offre de meilleurs débits aux SU et PU sur toute la plage de facteurs d'activité du PU et le débit combiné est en augmentation monotonique avec le nombre de sous-porteurs. Il est aussi confirmé que, pour la perception du spectre en bande large, le seuil pour la maximisation de capacité est plus performant que les seuils bayésiens pour permettre une contrainte beaucoup plus stricte sur les débits guarantis au PU tout en fournissant de meilleurs débits au PU et SU.
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Tang, Liang. "Performance analyses and design for cognitive radios." Thesis, University of Warwick, 2012. http://wrap.warwick.ac.uk/56288/.
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Cognitive radio has been proposed as a promising solution to the conflict between the spectrum scarcity and spectrum under-utilization. As the demand increases for wireless communication services, cognitive radio technology attracts huge attention from both commercial industries and academic researches. The purpose of this thesis is to provide an analytical evaluation of the cognitive radio system performance while taking into consideration of some realistic conditions. Several problems are investigated in this thesis. First, by adopting a dynamic primary user traffic model with one primary user occupancy status change and exponentially distributed channel holding times, its effect on the cognitive radio system performance is evaluated. In the evaluation, the sensing-throughput tradeoff of the cognitive radio is used as the examination criteria, while energy detection is applied during the spectrum sensing. The thesis then takes the investigation further by establishing a primary user multiple changes traffic model which considers multiple primary user occupancy status changes and any reasonable channel holding time distributions. The effect of the primary user multiple changes traffic on the spectrum sensing performance is investigated while the channel holding times are assumed to be exponential, Gamma, Erlang and log-normal distributed. The analytical evaluation of cognitive radio is also carried out from the secondary user transmission perspective, where the performance of the adaptive modulation in cognitive radio system is investigated. The effect of the cognitive radio distinctive features on the performance of both the adaptive continuous rate scheme and the adaptive discrete rate scheme of the adaptive modulation are examined. The BER performance and the link spectral efficiency performance are derived for both schemes. A novel frame structure where the spectrum sensing is performed by using the recovered received secondary frames is also evaluated in this thesis. A realistic scenario which considers the secondary user signal decoding errors is examined for the novel structure, while an ideal upper bound performance is given when the decoding process is assumed perfect. By extending the system to include multiple consecutive secondary frames, the performance of the novel structure is compared to the performance of the traditional frame structure proposed by the IEEE 802.22 WRAN standard. The effect of the primary user multiple changes traffic is also examined for the novel structure. Several major findings are made from the analytical evaluations presented in this thesis. Through numerical examinations, it was shown that, first, the dynamic primary user traffic degrades the performance of cognitive radio systems. Second, the degree of the performance degradation of the cognitive radio systems is related to the number of primary user status changes and the primary user traffic intensity. Different primary user channel holding times distributions also lead to different sensitivities of the system performance to the primary user traffic. Third, cognitive radio distinctive features degrades the performance of the adaptive modulation. When the novel structure is applied for cognitive radio, a higher secondary achievable throughput can be obtained with a limited saturation threshold.
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Chehrazi, Saeed. "Broadband front-ends for software-defined radios." Diss., Restricted to subscribing institutions, 2008. http://proquest.umi.com/pqdweb?did=1692688421&sid=1&Fmt=2&clientId=1564&RQT=309&VName=PQD.
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