112 research outputs found
Magnetic Properties of the Metamagnet Ising Model in a three-dimensional Lattice in a Random and Uniform Field
By employing the Monte Carlo technique we study the behavior of Metamagnet
Ising Model in a random field. The phase diagram is obtained by using the
algorithm of Glaubr in a cubic lattice of linear size with values ranging
from 16 to 42 and with periodic boundary conditions.Comment: 4 pages, 6 figure
An SFC-enabled approach for processing SSL/TLS encrypted traffic in future enterprise networks
In this paper, we propose an architecture based on NFV and SDN which allows to balance traffic analysis techniques using a Classifier. It steers flows to the appropriate Service Function Chaining (to open traffic or not) according to network requirements (such as, effectiveness, flexibility, scalability, performance, and privacy). The SSL/TLS traffic processing is carried-out by the centerpiece of this work, the SFC-enabled MITM. A Proof-of-Concept was conducted (focusing on our SFC-enabled MITM) which showed that functionalities lost due to encryption (Content Optimization, Caching, Network Anti-virus, and Content Filter) were recovered when processing opened traffic within its Service Function Chains. We also evaluated its impact on performance. The results show that cipher suite overhead plays a role but can be mitigated, the Classifier can alleviate the performance overhead of different traffic analysis techniques, network functions have lower impact to performance, and Service Function Chaining length influences page load time.publishe
Orchestrating an SFC-enabled SSL/TLS traffic processing architecture using MANO
The heterogeneity of 5G requirements commands
more complex network architectures, imposing the need for
network orchestration. ETSI NFV MANO is the standard which
defines a common framework for vendors and operators to
integrate their orchestration efforts. In this paper, we evaluated
how an ETSI NFV MANO compliant orchestrator (OSM) fares
while orchestrating an SFC-enabled SSL/TLS encrypted traffic
processing architecture, which supports both edge and cloud
deployments. A quantitative evaluation was carried-out, which
assessed the responsiveness and overheads of OSM, as well as the
actual functionality of our SSL/TLS processing architecture (with
edge computing components). A qualitative evaluation was also
carried-out, providing insight into the maturity of the current
OSM release, what works well, what requires workarounds,
and the actual limitations. A demonstration of the architecture
evaluated in this work was accepted as a contribution to the
ETSI OSM PoC Framework.publishe
O mártir, o humanista, o pedagogo: a contemporaneidade de Rui Barbosa e a educação nas comemorações do centenário de seu nascimento (1949)¹
Diversity of lactic acid bacteria of the bioethanol process
<p>Abstract</p> <p>Background</p> <p>Bacteria may compete with yeast for nutrients during bioethanol production process, potentially causing economic losses. This is the first study aiming at the quantification and identification of Lactic Acid Bacteria (LAB) present in the bioethanol industrial processes in different distilleries of Brazil.</p> <p>Results</p> <p>A total of 489 LAB isolates were obtained from four distilleries in 2007 and 2008. The abundance of LAB in the fermentation tanks varied between 6.0 × 10<sup>5 </sup>and 8.9 × 10<sup>8 </sup>CFUs/mL. Crude sugar cane juice contained 7.4 × 10<sup>7 </sup>to 6.0 × 10<sup>8 </sup>LAB CFUs. Most of the LAB isolates belonged to the genus <it>Lactobacillus </it>according to rRNA operon enzyme restriction profiles. A variety of <it>Lactobacillus </it>species occurred throughout the bioethanol process, but the most frequently found species towards the end of the harvest season were <it>L. fermentum </it>and <it>L. vini</it>. The different rep-PCR patterns indicate the co-occurrence of distinct populations of the species <it>L. fermentum </it>and <it>L. vini</it>, suggesting a great intraspecific diversity. Representative isolates of both species had the ability to grow in medium containing up to 10% ethanol, suggesting selection of ethanol tolerant bacteria throughout the process.</p> <p>Conclusions</p> <p>This study served as a first survey of the LAB diversity in the bioethanol process in Brazil. The abundance and diversity of LAB suggest that they have a significant impact in the bioethanol process.</p
Germinação de sementes e crescimento inicial de maracujazeiros irrigados com água salina em diferentes volumes de substrato
Soil maps, field knowledge, forest inventory and Ecological-Economic Zoning as a basis for agricultural suitability of lands in Minas Gerais elaborated in GIS
Prediction of hybrid means from a partial circulant diallel table using the ordinary least square and the mixed model methods
Funções e ordem da razão dos nutrientes no estabelecimento de normas DRIS em laranjeira 'Valência'
- …