M.A. thesis: Jāmiʻat al-Qāhirah, Qism al-Lughah al-ʻArabīyah, 1978. / Reproduced from typescript copy.

Inaug. Diss.--Giessen.

Partial contents of the author's thesis (doctoral--Jāmiʻat Muḥammad ibn Saʻūd al-Islāmīyah, Riyadh) presented under title: al-Mutanabbī al-insān wa-al-shāʻir bayna Abī Tammām wa-Abī Firās. / Includes bibliographical references (p. [171]-186).

Thesis (master's)--Jāmiʻat Ṭanṭā, 1989. / Includes bibliographical references (p. 539-570).

Thesis (M.A. in Security Studies (Combating Terrorism: Policy and Strategy))--Naval Postgraduate School, June 2010. / Thesis Advisor(s): Denning, Dorothy ; Russell, James. "June 2010." Description based on title screen as viewed on July 13, 2010. Author(s) subject terms: Cyber attack, international law, China, Russia, United States, al Qaeda, Hamas, Hezbollah, FARC, Botnet, worm, virus, malicious code, hack, jus in bello, jus ad bellum, Law of Armed Conflict (LOAC), laws of war, counterterrorism operations (CT), cyber strategy, military strategy, foreign policy, national policy, use of force, armed attack, enforcement, evaluation Includes bibliographical references (p. 55-60). Also available in print.

Berlin, Freie Univ., Diss., 2004. / Dateiformat: zip, dateien im PDF-Format

Bochum, Univ., Diss., 2003.

Les alliages Ti-Al sont depuis peu utilisés industriellement dans le domaine aéronautique. Il est nécessaire d’affiner les grains dans ces alliages en évitant la formation des précipités. Une nouvelle méthode d’inoculation appelée inoculation isomorphe a été développée où les particules agissent comme des sites de croissance plutôt que comme des sites de germination, évitant ainsi la barrière d’énergie pour la germination. Trois alliages inoculants ont été développés, les deux premiers, Ti-10Al-25Nb et Ti-25Al-10Ta, allient une bonne cohérence du paramètre de maille avec l’alliage de base et une bonne stabilité dans le liquide. Le troisième, Ti-47Ta, met en avant l’aspect stabilité. Les coulées ont montré que les premiers deux alliages ont affiné les grains sans laisser de particules hétérogènes. L’alliage binaire Ti-Ta a une densité trop importante et les particules ont sédimentées dans le lingot où elles n’ont pas pu jouer leur rôle. L’efficacité des inoculants est supérieure à l’unité, chaque particule étant responsable de la formation de plus d’un nouveau grain. Ce dernier effet est attribué à la polycristallinité des inoculants qui peuvent se fragmenter par dissolution préférentielle aux joints de grains. Les calculs prenant en compte la fragmentation et la dissolution indiquent des efficacités proches de l’unité, ce qui confirme les valeurs expérimentales d’efficacité anormalement élevées / Ti-Al alloys are an important material for aerospace applications. In order to implement them in more applications it is important to develop a method of grain refinement which can avoid precipitates. A new method of inoculation called isomorphic inoculation was developed where inoculant particles act as direct centers of growth rather than nucleation sites, avoiding the energy barrier required for nucleation. Three inoculant alloys were tested, two which balanced lattice matching between the inoculant and bulk alloy and the inoculant stability in the liquid melt, Ti-10Al-25Nb and Ti-25Al-10Ta, and one which prioritized stability, Ti-47Ta. Casting trials were carried out which showed the balanced alloys sucessfully grain refined the as-cast structure without leaving any heterogeneous particles in the structure. The binary Ti-Ta alloy was not successful due to its high density which caused the particles to settle to the bottom of the ingots where they could not participate in solidification. The inoculants were found to have an efficiency greater than one, meaning each particle was responsible for more than one new grain forming in the cast structure. This was attributed to the polycrystalline nature of the partciles which may break up into multiple particles by preferential dissolution or wetting of the grain boundaries during interaction with the melt. Calculations showed that taking into account particle break up and dissolution the efficiencies approached one, indicating this mechanism is responsible for the anomalously high efficiencies observed

Ce travail est consacré à la conception, l'analyse et l'optimisation des codes correcteurs d'effacements de niveau applicatif (AL-FEC). Nous nous intéressons à une famille des codes LDPC généralisés (GLDPC), nommés les codes GLDPC-Staircase, qui sont composé d'un code LDPC-Staircase code de base ainsi que des codes Reed-Solomon (RS) (codes externes). Dans la première partie de cette thèse, nous commençons par montrer que les codes RS ayant une construction basée sur la matrice "quasi" Hankel sont les codes MDS les plus appropriés pour obtenir la structure des codes GLDPC-Staircase. Ensuite, nous proposons un nouveau type de décodage à ces codes, baptisé décodage hybride (IT/RS/ML), pour atteindre les capacités de correction du décodage par maximum de vraisemblance (ML) avec de faible complexité. Afin d'étudier l'impact de la structure des codes GLDPC-Staircase sur le décodage, nous proposons une autre construction : ils diffèrent sur la nature des symboles de redondance LDPC générés. Puis, pour prédire le seuil de décodage et les écarts par rapport à la limite de Shannon des codes GLDPC-Staircase, nous élaborons une analyse asymptotique en fonction de la technique d'évolution de densité (DE), les technique EXIT (Extrinsic Information Transfer) et la théorème d'air. Finalement, en se basant sur l'analyse à taille finie et l'analyse asymptotique, nous réglons les importants paramètres internes de ces codes pour obtenir la configuration optimale sous le décodage hybride (IT/RS/ML). La deuxième partie de la thèse est consacrée à l'étude des codes GLDPC-Staircase dans diverses situations. Tout d'abord, nous montrons que ces codes ont des performances asymptotiquement très proches des limites théoriques de Shannon. En plus, à taille fini, ils permettent d'atteindre d'excellentes capacités de correction d'effacements (i.e., très proches de celle des codes MDS idéal) peu importe la taille des objets : très faible overhead de décodage, faible plancher d'erreur, et une zone ``waterfull'' raide. Nous montrons aussi que ces codes surpassent les codes Raptor, les codes LDPC-Staircase, et un autre code GLDPC avec une construction differente. Finallement, nous proposons une méthodologie générale pour régler le problème de l'impact de l'ordonnancement des paquets sur les performance des codes GLDPC-Staircase sur un grand nombre des canaux à effacements (avec perte en rafale ou pas). Cette étude montre le meilleur ordonnancement de paquets. Tous les résultats mentionnés ci-dessus montrent que les codes GLDPC-Staircase peuvent considérés comme des codes FEC de niveau applicatif (AL-FEC) universelle. / This work is dedicated to the design, analysis and optimization of Application-Level Forward Erasure Correction (AL-FEC) codes. In particular, we explore a class of Gen- eralized LDPC (GLDPC) codes, named GLDPC-Staircase codes, involving the LDPC- Staircase code (base code) as well as Reed-Solomon (RS) codes (outer codes). In the first part of this thesis, we start by showing that RS codes having “quasi” Han- kel matrix-based construction are the most suitable MDS codes to obtain the structure of GLDPC-Staircase codes. Then, we propose a new decoding type, so-called hybrid (IT/RS/ML) decoding, for these codes to achieve Maximum Likelihood (ML) correction capabilities with a lower complexity. To investigate the impact of the structure of GLDPC- Staircase codes on decoding, we propose another construction: they differ on the nature of generated LDPC repair symbols. Afterwards, to predict the capacity approaching GLDPC- Staircase codes, we derive an asymptotic analysis based on DE, EXIT functions, and area theorem. Eventually, based on finite length analysis and asymptotic analysis, we tune important internal parameters of GLDPC-Staircase codes to obtain the best configuration under hybrid (IT/RS/ML) decoding. The second part of the thesis benchmarks GLDPC-Staircase codes in various situations. First, we show that these codes are asymptotically quite close to Shannon limit performance and achieve finite length excellent erasure correction capabilities very close to that of ideal MDS codes no matter the objects size: very small decoding overhead, low error floor, and steep waterfall region. Second, we show that these codes outperform Raptor codes, LDPC- Staircase codes, other construction of GLDPC codes, and have correction capabilities close to that of RaptorQ codes. Last but not least, we propose a general-methodology to address the problem of the impact of packet scheduling on GLDPC-Staircase codes for a large set of loss channels (with burst loss or not). This study shows the best packet scheduling. All the aforementioned results make GLDPC-Staircase codes an ubiquitous Application-Level FEC (AL-FEC) solution.

Dissertação (mestrado)—Universidade de Brasília, Programa Multiinstitucional e Inter-Regional de Pós-graduação em Ciências Contábeis UnB/UFPB/UFPE/UFRN, 2006. / Submitted by Alexandre Marinho Pimenta (alexmpsin@hotmail.com) on 2009-11-14T18:20:26Z No. of bitstreams: 1 2006_MárciaMariaSilvadeLima.pdf: 295740 bytes, checksum: 297f973bd66e25d34de75a3c6bfb5fc0 (MD5) / Approved for entry into archive by Gomes Neide(nagomes2005@gmail.com) on 2010-12-16T18:23:02Z (GMT) No. of bitstreams: 1 2006_MárciaMariaSilvadeLima.pdf: 295740 bytes, checksum: 297f973bd66e25d34de75a3c6bfb5fc0 (MD5) / Made available in DSpace on 2010-12-16T18:23:02Z (GMT). No. of bitstreams: 1 2006_MárciaMariaSilvadeLima.pdf: 295740 bytes, checksum: 297f973bd66e25d34de75a3c6bfb5fc0 (MD5) Previous issue date: 2006 / Este estudo tem como objetivo a discussão e reflexão sobre a forma como as informações contábeis na área gerencial são utilizadas pelas indústrias sucroalcooleiras, localizadas no Estado de Alagoas, visando identificar se aquelas atendem às expectativas dos gestores no processo de tomada de decisão. Diante do universo de 27 (vinte e sete) empresas cadastradas no banco de dados do Sindicato da Indústria do Açúcar e do Álcool no Estado de Alagoas – SINDAÇÚCAR – AL, foram coletados 14 (quatorze) questionários que deram suporte à presente pesquisa classificada como exploratória e descritiva. A junção desses dois tipos de pesquisa resultou na análise quantitativa e perceptiva da utilização das informações contábeis no processo de tomada de decisão dos gestores das indústrias sucroalcooleiras de Alagoas. Os resultados demonstrados nesta pesquisa indicam que, apesar dos gestores considerarem relevantes as informações na área de custos, os mesmos não as utilizam no processo decisório. Os relatórios emitidos pela contabilidade são apenas de natureza financeira, tais como balanços, demonstração do resultado do exercício, fluxo financeiro, entre outros. O grau de importância que os gestores dão à informação contábil e o tipo de informação que utilizam no processo decisório não indicam que eles utilizam a contabilidade em nível gerencial. A análise estatística dos dados coletados permite inferir que as informações fornecidas pela contabilidade são consideradas importantes, porém são pouco utilizadas no processo de gestão. _______________________________________________________________________________ ABSTRACT / This study has the purpose of discussion and reflection of how the accounting information in the managemental area are used by the sugar & alcohol industry, located at State of Alagoas, aiming to identify if them please their managers expectations in the process of taking decision. Ahead of an existent universe of 27 (twenty seven) companies registered at the Sugar & Alcohol Labor Union of State of Alagoas – SINDAÇUCAR – files, were collected 14 (fourteen) questionnaires to support the current research classified as explorative and descriptive. The junction of these two kinds of research resulted in a quantitative and perceptive analysis of the use of the accounting information in the process of taking decision of the Sugar & Alcohol industry in Alagoas. The results demonstrated in this research indicate that, although the managers consider relevant the information at cost area, they do not use them in the process of taking decision. The reports emitted by accountancy are only financial, such as balance sheets, income statement, financial flow, among others factors. The importance order that the managers give to the accounting information and the kind of information that they use in the process of taking decision do not indicates that they use the accountancy in administration level. The statistics analysis of the files collected allows infer that the information provided by accountancy are considered important, however are few used at the manager process.