The contents of Section 2.2 and Chapter 4 first appeared in proceedings of the 12th International Conference on Web Information Systems and Technologies, 2016 (www.webist.org). The contents of Section 2.3 and Chapter 5 first appeared in DBSJ Journal, vol. 14, article no. 2, March 2016. The contents of Section 2.5 and Chapter 7 first appeared in proceedings of the 11th Asia Information Retrieval Societies Conference, Lecture Notes in Computer Science, vol. 9460, pp. 188-200, 2015 (The final publication is available at link.springer.com). / 京都大学 / 0048 / 新制・課程博士 / 博士(情報学) / 甲第19854号 / 情博第605号 / 新制||情||105(附属図書館) / 32890 / 京都大学大学院情報学研究科社会情報学専攻 / (主査)教授 田島 敬史, 教授 田中 克己, 教授 吉川 正俊 / 学位規則第4条第1項該当 / Doctor of Informatics / Kyoto University / DFAM

Digital communications have now become a fundamental part of modern society. In communications, channel coding is an effective way to reduce the information rate down to channel capacity so that the information can be transmitted reliably through the channel. This thesis is devoted to studying the mathematical theory and analysis of channel codes that possess a useful diagonal structure in the parity-check and generator matrices. The first aspect of these codes that is studied is the ability to describe the parity-check matrix of a code with sliding diagonal structure using polynomials. Using this framework, an efficient new method is proposed to obtain a generator matrix G from certain types of parity-check matrices with a so-called defective cyclic block structure. By the nature of this method, G can also be completely described by a polynomial, which leads to efficient encoder design using shift registers. In addition, there is no need for the matrices to be in systematic form, thus avoiding the need for Gaussian elimination. Following this work, we proceed to explore some of the properties of diagonally structured lowdensity parity-check (LDPC) convolutional codes. LDPC convolutional codes have been shown to be capable of achieving the same capacity-approaching performance as LDPC block codes with iterative message-passing decoding. The first crucial property studied is the minimum free distance of LDPC convolutional code ensembles, an important parameter contributing to the error-correcting capability of the code. Here, asymptotic methods are used to form lower bounds on the ratio of the free distance to constraint length for several ensembles of asymptotically good, protograph-based LDPC convolutional codes. Further, it is shown that this ratio of free distance to constraint length for such LDPC convolutional codes exceeds the ratio of minimum distance to block length for corresponding LDPC block codes. Another interesting property of these codes is the way in which the structure affects the performance in the infamous error floor (which occurs at high signal to noise ratio) of the bit error rate curve. It has been suggested that “near-codewords” may be a significant factor affecting decoding failures of LDPC codes over an additive white Gaussian noise (AWGN) channel. A near-codeword is a sequence that satisfies almost all of the check equations. These nearcodewords can be associated with so-called ‘trapping sets’ that exist in the Tanner graph of a code. In the final major contribution of the thesis, trapping sets of protograph-based LDPC convolutional codes are analysed. Here, asymptotic methods are used to calculate a lower bound for the trapping set growth rates for several ensembles of asymptotically good protograph-based LDPC convolutional codes. This value can be used to predict where the error floor will occur for these codes under iterative message-passing decoding.

<p>Usled pojave novog nacina oblikovanja prostora naselja i uocenih osnovnih<br />tendencija transformacija, pri kojima se gube osnovne karakteristike tradicionalno<br />formiranih blokova, otpocelo je istraživanje uloge urbanog i ruralnog bloka u<br />formiranju strukture i identiteta naselja u Vojvodini. Osnovni cilj ove doktorske<br />disertacije je da se potvrdi da je blok oduvek bio sastavni, ponekad i neodvojivi, deo<br />strukture naselja, njegov prepoznatljiv element i znacajno mesto susedstva, pa da je,<br />zbog toga, bitno sacuvati njegove vrednosti i pri buducim intervencijama u naseljima.<br />Da bi se shvatio uzrok pojave nestajanja tradicionalnog bloka, istraživane su<br />njegove karakteristike u naseljima iz pro&scaron;losti, a prouceni su i stavovi o bloku svetski<br />poznatih autora iz oblasti urbanizma i arhitekture. Analiziranjem nacina razmi&scaron;ljanja<br />razlicitih autora i uocavanjem efekata njihovih stavova po pitanju organizacije,<br />funkcionisanja, ekologije i ostalih karakteristika blokova, do&scaron;lo se do novih saznanja<br />bitnih za dalje delovanje u oblastima planiranja, projektovanja, gra&eth;enja, za&scaron;tite i<br />edukacije. Detaljnim sagledavanjem bloka kao samostalnog elementa, ali i kao<br />elementa koji je u me&eth;udejstvu sa ostalim delovima naselja, istražene su sve<br />njegove vrednosti i dokazana je njegova uloga u formiranju strukture i identiteta<br />naselja.<br />Na primerima urbanih i ruralnih naselja iz Vojvodine i njenog okruženja<br />analizirane su i me&eth;usobno upore&eth;ene osnovne karakteristike centralnih i perifernih<br />blokava i dokazan je njihov uticaj na formiranje stukture i identiteta naselja.<br />Konstatovane su velike slicnosti izme&eth;u istraživanih blokova, ali i odre&eth;ene razlike.<br />Tokom istraživanja su konstatovane i slicnosti izme&eth;u razlicitih prostornih elemenata<br />kao npr. izme&eth;u naselja, bloka, objekta i predmeta. Na osnovu svega toga je<br />zakljuceno da je blok zaista jedan od osnovnih elemenata naselja, cijem oblikovanju i<br />rekonstrukciji, zbog toga, treba prilaziti veoma oprezno i sveobuhvatno.<br />Na osnovu sprovedenih istraživanja naselja i njihovih blokova, kako u<br />pro&scaron;losti, tako i u sada&scaron;njosti, naznacene su moguce vizije razvoja bloka. Sa<br />osnovnim ciljem da se sacuvaju vrednosti koje ima tradicionalno organizovan blok,<br />kao i da se ukaže na metode razvoja i transformacija blokova u buducnosti, do&scaron;lo se<br />do preporuka za njihovo: planiranje, projektovanje, gra&eth;enje, za&scaron;titu i edukaciju koja<br />se odnosi na blok. Teorijska istraživanja su konkretizovana kroz izradu modela<br />istraživanja naselja i blokova, data je i anketa za istraživanje socijalnih kontakata u<br />okviru blokova, a po formiranim modelima je sprovedeno istraživanje na 16 naselja i<br />32 bloka. Rezultati ove doktorske disertacije su formulisani u obliku preporuka za<br />intervenisanje u razlicitim oblastima ure&eth;enja prostora naselja. Pri tome se ocekuje<br />da se doprinese adekvatnijem ure&eth;enju blokova, a time i naselja.</p> / <p> Due to the appearance of the new manner of forming space in settlements and<br /> the observed basic tendencies of transformation, resulting in the loss of basic<br /> characteristics of traditional blocks, this research commenced with the role of urban<br /> and rural block in forming the structure and the identity of settlements in Vojvodina.<br /> The basic aim of this Doctoral dissertation is to confirm that the block has always<br /> been an incorporated and sometimes the inseparable segment of settlement<br /> structure, its recognisable element and an important place of neighbouring.<br /> Therefore, it has been essential to protect values of traditional blocks in future<br /> interventions in settlements.<br /> In order to understand the causes of traditional block disappearance, the<br /> dissertation deals with researching its characteristics historically, accompanying with<br /> studying the opinions on blocks by world-known authors in the field of urbanism and<br /> architecture. The analysis on the manner of thinking of various authors and the<br /> observations on the effects of their opinion on organization, function, ecology and<br /> other characteristics of blocks led to new knowledge essential for further work in<br /> planning, designing, construction, protection and education. Scanning a block as an<br /> individual element, yet an element in interaction with the other segments of<br /> settlement as well, all its values have been investigated and its role in forming the<br /> structure and the identity of settlements has been proven.<br /> Utilizing the examples from urban and rural settlements in Vojvodina and the<br /> surrounding regions, the basic characteristics of central and peripheral blocks have<br /> been analysed and mutually compared, and their influence on creating the structure<br /> and the identity of settlements has been proven. Extensive similarities among the<br /> examined blocks have been established, as well as certain differences. During the<br /> research, certain similarities between diverse spatial elements have been observed<br /> as well, such as between settlements, blocks, facilities and objects. Based on the<br /> above, it could have been concluded that the block is truly one of the basic elements<br /> of settlements; thus, it is necessary to approach its shape and reconstruction very<br /> carefully and thoroughly.<br /> Based on the conducted researches of settlements and their blocks, in the<br /> past as well as in the present, plausible visions of block&#39;s development have been<br /> specified. In order to preserve the values of traditionally organized blocks, as well as<br /> to indicate the methods of the block development and transformation in the future,<br /> the dissertation offers certain recommendations for their planning, designing,<br /> construction, building protection and education referring to blocks. The theoretical<br /> researches have been realized through making of research models of settlements<br /> and blocks. The dissertation also provides a questionnaire for the purpose of<br /> researching social contacts within blocks, while the formed models were utilized to<br /> conduct a research on 16 settlements and 32 blocks. The results of this Doctoral<br /> dissertation have been presented as recommendations for the interventions in<br /> diverse areas of settlement area arrangements. They are expected to contribute to<br /> more adequate arrangement of blocks and hence the settlements as well.</p>

No description available.

Zinc xanthates polymerize propylene oxide into high polymer (PPO) with coordination mechanism. In order to identify structure and stereoisomerisms of this polymer, PPO was subjected to thermal and column fractionation. Obtained fractions were characterized by end-group analysis, cryoscopy, viscometry, IR and 13C-NMR spectroscopy, melting temperature. PPO is composed of a high molecular weight, stereoregular, crystallizable polymer (K-polymer) with low molecular weight (=500 g/mol) D-polymer. Presence of double bonds and hydroxyl terminals was interpreted as the product of an anionic mechanism. K-Polymers can be thermally fractionated on the basis of their melting temperature (Tm) rather than molecular weight (Mwt). It&amp / #8217 / s found that higher Tm fractions have lower Mwt, but they precipitate at higher temperatures than higher Mwt but lower Tm fractions. In column fractionation, K-polymers were deposited on glass beads from isooctane solution in a narrow temperature interval. Then the precipitated samples were split into a number of fractions by using again isooctane but at a higher temperature than the precipitation temperature by increasing residence time from 5 minutes to several hours. It&amp / #8217 / s found that rate of solubility is not controlled by molecular weight, but controlled by percentage crystallinity and Tm. Highest Tm polymers, with relatively higher Mwt showed faster rate of solution than that of lower Tm, lower Mwt but higher percent crystalline fractions. This discrepancy was accounted by suggesting a stereo-block structure where tactic blocks are bound each other with non-crystallizable atactic blocks. The mechanism of polymerization was also discussed in some detail.

This diploma thesis deals with the static assessment of selected parts of the panel building of the former boarding school, for which adaptation to separate housing units and extension of one floor is planned. Upon the planned change of layout, extensions of the original door openings and new openings are proposed. The work assesses the object in its original state with the included unprofessional interference in statics during its use, and the object in the final state with planned modifications of the openings and proposes solutions to secure unsatisfactory areas to suit the new state loads

Made available in DSpace on 2015-04-11T14:02:59Z (GMT). No. of bitstreams: 1 Pedro Antonio Gonzales Sanchez.pdf: 1313238 bytes, checksum: 234b86be8198c8c3e01948d1e566aa19 (MD5) Previous issue date: 2013-07-17 / CNPq - Conselho Nacional de Desenvolvimento Científico e Tecnológico / Today, the Internet is considered a powerful tool of communication and information. Its impact on society is increasing more and more, which means that it is becoming indispensable. In this context information searching systems are becoming increasingly important. In this paper, we propose a new search method capable of learning ranking functions that explore Web pages structure in blocks, using genetic programming. Different from previous works, our method allows combining traditional evidence in information retrieval with evidence derived from the structure of Web pages. To validate the proposed method, we use three real collections of pages (IG, CNN and BLOG). Experimental results show that our approach is able to overcome the results of a baseline of information which uses blocks information without learning machine, presenting precision benefits (MAP) of 9.38% in the IG collection, from 7.13% in CNN, and 25.87% in collection BLOG. Regarding our second baseline, which uses genetic programming out of traditional evidence in information retrieval, our method achieved benefits of 5.25% in the IG collection, 10.37% and 4.37% on CNN in collection BLOG. / Na atualidade, a Internet é considerada uma poderosa ferramenta de comunicação e informação. Seu impacto na sociedade está aumentando cada vez mais, o que significa que está se tornando indispensável. Neste contexto, sistemas de busca por informação tornam-se cada vez mais importantes. Neste trabalho, propomos um novo método de busca capaz de aprender funções de ranking que exploram a estrutura em bloco das páginas Web, usando programação genética. Diferentemente de trabalhos anteriores, nosso método permite combinar evidências tradicionais em recuperação de informação com evidências derivadas da estrutura das páginas. Para validar o método proposto, utilizamos três coleções reais de páginas (IG, CNN e BLOG). Os resultados experimentais mostram que nossa abordagem é capaz de superar os resultados de um baseline que usa informações de blocos sem aprendizagem de máquina, apresentando ganhos de precisão (MAP) de 9,38% na coleção IG, de 7,13% na CNN, e 25,87% na coleção de BLOG. Em relação a nosso segundo baseline, que usa programação genética a partir de evidências tradicionais de recuperação de informação, nosso método conseguiu ganhos de 5,25% na coleção IG, 10,37% na CNN e 4,37% na coleção de BLOG.

The diploma thesis deals with a new development on the outskirts of Náměšť nad Oslavou in a locality behind the railway. The proposal addresses the possibility of connecting the area to the city, both road and pedestrian. The new development is located in a sloping terrain and complements the missing amenities in the area and adds new public spaces. in the area are designed houses, terraced houses and villa houses. The design respects the character of the place and the existing buildings in Náměšť nad Oslavou.

The residential area in Brno - Červený kopec is multifunctional new part of the city of Brno. Urban development based on the Žlutý kopec and Veveří. Historically, the studied area is located at the brickyard Kohn, who is now a brownfield site. The idea was to create a readable and clearly definable urban structure in relation to the proposed road network. The core area is dense five-storey mixed-use residential buildings with commercial parterre, which makes maximum use of space and brings order to the scattered houses in the area.

The theme of the diploma thesis „Brno brownfields by the Svitava River“ Is design of contemporary city structure in Brno Husovice. The theisis deals with the analysis of the current situation, definition of problems and opportunities in the location and the design, based on these researches. Studied area is located on the riverbank of the Svitava River and is defined by Provazníkova, Dukelská třída and Svitavské nábřeží streets. In these days there are mostly located brownfields of the previous industry parks, storage spaces and development of family houses. The design puts emphasis on the gentle merge with the urban structure of the old Husovice and focuses on using modern architectonic and urban approaches as well, for example on multifunctionality of buildings. The riverbank is revitalised and attractive features are designed here, like the footbridges conneting both river sides and sittable stairs. These designs provide space for leisure time and a water control during the floods as well. The traffic solution is concerned on the design of the new Nová Dukelská street, connecting formerly Zbrojovka industry park and Provazníkova street.