Analyzing Peer Selection Policies for BitTorrent Multimedia On-Demand Streaming Systems in Internet

The adaptation of the BitTorrent protocol to multimedia on-demand streaming systems essentially lies on the modification of its two core algorithms, namely the piece and the peer selection policies, respectively. Much more attention has though been given to the piece selection policy. Within this context, this article proposes three novel peer selection policies for the design of BitTorrent-like protocols targeted at that type of systems: Select Balanced Neighbour Policy (SBNP), Select Regular Neighbour Policy (SRNP), and Select Optimistic Neighbour Policy (SONP). These proposals are validated through a competitive analysis based on simulations which encompass a variety of multimedia scenarios, defined in function of important characterization parameters such as content type, content size, and client interactivity profile. Service time, number of clients served and efficiency retrieving coefficient are the performance metrics assessed in the analysis. The final results mainly show that the novel proposals constitute scalable solutions that may be considered for real project designs. Lastly, future work is included in the conclusion of this paper.Comment: 19 PAGE

Improving BitTorrent's Peer Selection For Multimedia Content On-Demand Delivery

The great efficiency achieved by the BitTorrent protocol for the distribution of large amounts of data inspired its adoption to provide multimedia content on-demand delivery over the Internet. As it is not designed for this purpose, some adjustments have been proposed in order to meet the related QoS requirements like low startup delay and smooth playback continuity. Accordingly, this paper introduces a BitTorrent-like proposal named as Quota-Based Peer Selection (QBPS). This proposal is mainly based on the adaptation of the original peer-selection policy of the BitTorrent protocol. Its validation is achieved by means of simulations and competitive analysis. The final results show that QBPS outperforms other recent proposals of the literature. For instance, it achieves a throughput optimization of up to 48.0% in low-provision capacity scenarios where users are very interactive.Comment: International Journal of Computer Networks & Communications(IJCNC) Vol.7, No.6, November 201

Terrain Database Correlation Assessment Using an Open Source Tool

Configuring networked simulators for training military teams in a distributed environment requires the usage of a set of terrain databases to represent the same training area. The results of simulation exercises can be degraded if the terrain databases are poorly correlated. A number of methodologies for determining the correlation between terrain databaHowever, there are few computational tools for this task and most of them were developed to address government needs, have limited availability, and handle specific digital formats. The goal of this paper is thus to present a novel open source tool developed as part of an academic research project.Comment: 12 pages, I/ITSEC 201

On the Optimization of BitTorrent-Like Protocols for Interactive On-Demand Streaming Systems

This paper proposes two novel optimized BitTorrent-like protocols for interactive multimedia streaming: the Simple Interactive Streaming Protocol (SISP) and the Exclusive Interactive Streaming Protocol (EISP). The former chiefly seeks a trade-off between playback continuity and data diversity, while the latter is mostly focused on playback continuity. To assure a thorough and up-to-date approach, related work is carefully examined and important open issues, concerning the design of BitTorrent-like algorithms, are analyzed as well. Through simulations, in a variety of near-real file replication scenarios, the novel protocols are evaluated using distinct performance metrics. Among the major findings, the final results show that the two novel proposals are efficient and, besides, focusing on playback continuity ends up being the best design concept to achieve high quality of service. Lastly, avenues for further research are included at the end of this paper as well.Comment: 20 page

Antibody-cytokeratin marker 34βe12 In prostate cancer detection

The histological diagnosis of prostate cancer is commonly based on morphological patterns. The presence of malignant tissue mixed with benign tissue, or the presence of carcinoma that mimics benignity may generate difficulty in the diagnostic elucidation. Therefore, the application of immunohistochemistry contributes its diagnostic value. Objectives: To evaluate the 34βE12 marker in the detection of adenocarcinoma (ADn), atypical small acinar proliferation (ASAp), regular prostatic tissue (RPT) and regular prostatic tissue alternated by atrophy spotlights (RPTa) in transrectal biopsy guided by ultrasonography of patients with suspected prostate cancer. Method: Analysis of 34 patients who underwent ultrasound-guided transrectal biopsy with subsequent analysis by H&E staining and 34βE12 labeling for elucidation of neoplasms or diseased tissues with doubtful diagnosis. Results: The marker 34βE12 showed negativity in 100% of the neoplasms ADn, positivity in 100% of the benign prostatic tissues (RPT and RPTa); the patients with ASAp presented positivity (20%) and negativity (80%). The chi-square test (χ)² showed that there is an association (χ ²= 29.55 and p < 0.0001) between the groups, that is, the 34βE12 marker has a significant value (p < 0.0001) in the elucidation of patients with prostatic neoplasia and benign prostatic tissues. Discussion and Conclusion: With the early screening of prostate cancer in the modern era, pathologists have become increasingly challenged to diagnose small outbreaks of cancer when only a few atypical glands are present in transrectal biopsy-guided ultrasonography. The 34βE12 marker becomes an important tool in elucidating diagnoses such as ADn and ASAp

The Europeanization of Third Country Judiciaries through the Application of the EU Acquis: the Cases of Russia and Ukraine

The aim of this article is to look at the phenomenon of Europeanization of judiciaries of third countries through the prism of EU external policy. It is argued that external factors (objectives of EU external policies, EU soft law, EU technical and financial assistance, favourable interpretation of EU law by the ECJ towards third country nationals) play important role in persuading third country judiciaries to apply the EU acquis in their judgments. The similar pattern can be envisaged with regard to Russia and Ukraine. Case study shows that EU policies towards these countries led to generally favourable attitude towards applying the EU acquis by Russian and Ukrainian courts, though mainly as a persuasive source of law. However, problems linked to effectiveness, independence and fight with corruption hinder further Europeanization of judiciaries in Russia and Ukraine

Ações de marketing cultural e esportivo: são realmente reforços à imagem institucional? O caso Correios e Telégrafos

Considerando que as modificações ocorridas no mercado consumidor, com a mudança de foco no produto para o foco no consumidor, houve uma preocupação das empresas em buscarem diferenciais como a agregação de valor a marcas, produtos e/ou serviços para se manterem ativas em meio a crescente concorrência. Com isso tornou-se crescente por parte das empresas o investimento em Marketing Cultural e Esportivo. O Patrocínio, seja ele cultural, social, educacional, ambiental ou esportivo, tornou-se uma ferramenta indispensável na estratégia de comunicação das marcas, cumprindo uma função muito importante no planejamento de comunicação das empresas. Por intermédio do patrocínio, a marca pode concretizar a transmissão dos seus atributos e envolver, com muito mais força, o coração e a mente dos seus públicos-alvos

O mercado de moda/vestuário feminino em Brasília

A monografia tem como objetivo analisar, de forma exploratória, o contexto do setor de vestuário no Brasil, identificando as vantagens e desvantagens de iniciar um empreendimento do segmento de moda/ vestuário na cidade de Brasília. Foram realizadas entrevistas com empresas do segmento de vestuário feminino, em que foi feita uma análise de como se encontra o mercado de moda em Brasília. Como principal resultado, identifica-se uma evolução do setor, porém a característica que Brasília tem, de ser uma cidade tipicamente política e administrativa, tem atrasado o desenvolvimento desse segmento na cidade. Dificuldades relacionadas à organização do setor e atuação do governo também foram apontadas como pontos de estagnação do ramo, mas isso não tem impedido de empresários da moda estarem demandando mais investimentos em seus negócios e expandido-os pela cidade, confiantes na prosperidade e no retorno financeiro positivos