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Implementação inicial da RFC 6897
(Universidade Federal de São Carlos, 2016-12-06) Silva, Alan Castro; Verdi, Fábio Luciano; https://lattes.cnpq.br/9143186843657940; https://lattes.cnpq.br/6695358074494763
The Multipath TCP (MPTCP) protocol allows applications to better explore the network resources available to multi-connected devices such as mobile phones or multi-homed systems. Here, some advantages are envisioned: bandwidth aggregation, the ability to maintain the connection, if one of the network path fails and the use of multiple paths. To extend these capabilities to the application, RFC 6897 defines an API to better control each of MPTCP’s subflows, so that these can be added or removed as needed. This work presents an initial API implementation as defined in RFC 6897. We implemented some functions described in the document, such as protocol on/o, check existent subflows and add new subflows. To test the API and validate our implementation we built an HTTP application that detects elephant flows and uses the API for open new subflows using the original TCP connection. Some tests were performed in a network using a cubic topology and showed that the API utilization decreased the Flow Completion time of TCP connections.
Sondagem de relações entre variáveis paternas, problemas de comportamento e desempenho acadêmico de pré-escolares
(Universidade Federal de São Carlos, 2016-12-06) Fantinato, Aline Costa; Cia, Fabiana; https://lattes.cnpq.br/5999108571365402; https://lattes.cnpq.br/4655774422303804
The role that the father plays in the family context is in the process of transformation, becoming a figure of greater affective involvement with the children. The father as well as the mother are important figures for the child, but there are few studies that investigate the father under his own eyes. Thus, the present study aimed to: (a) compare educational social skills, the characteristics of the marital relationship, the abuse potential for child maltreatment, according to the father's opinion, among the parents groups of preschool children who Present behavioral problems, low academic performance or typical development; (B) compare the index of behavioral problems according to the father's opinion among groups of preschoolers with behavioral problems, low academic performance or typical development, and (c) relate the variables. 105 men participated in the study, 45 parents of children with typical development; 29 parents of children with behavioral problems, and 31 parents of children with low academic achievement, and their children's teachers (N = 26). To achieve the goals: (a) parents responded to the Social Skills Inventory, Conjugal Relationship Questionnaire and Abuse Potential Inventory, and (b) teachers and parents answered the Skills and Difficulties Questionnaire (SDQ). The data obtained in the teachers' evaluation for the SDQ and the academic part of the Social Skills Rating System (SSRS) were used to divide the groups. To compare the results of the three groups, we used the t test, considering the comparison of two groups separately and to evaluate the relationships between the variables, the Pearson correlation test was used. The results showed statistically significant differences between the groups, and parents of children with typical development showed a better repertoire of educational social skills, more positive characteristics in the marital relationship and less potential for abuse. The parents of children with behavioral problems and low academic performance seemed to have more difficulties in the marital relationship, as well as in the interaction with the offspring, specifically on the social educational abilities, it was noticed that the parents of children with behavioral problems had the lowest averages. The correlations between the variables showed significant relationships between the adequate behaviors of parents and children; On the other hand, a poor repertoire of educational social skills was related to the behavioral problems of children. There were positive relationships between educational social skills and the positive characteristics of the marital relationship and negative relationships between educational social skills and the potential for paternal abuse. It is concluded that the positive interaction of the father with the offspring constitutes a mechanism of protection to the child development, besides the data of this study point to the influence of the marital relation with the way that the parents interact with the children, emphasizing the importance of the Positive interaction of the father with the children and of a family environment that promotes positive interactions among its members.
Ligação covalente coordenada boro-nitrogênio : um estudo comparativo entre moléculas derivadas do etano, eteno e etino orgânicos e inorgânicos
(Universidade Federal de São Carlos, 2016-12-06) Pupim, Carina Fernanda; López-Castillo, Alejandro; https://lattes.cnpq.br/2599181118729458; https://lattes.cnpq.br/5648050749050230
This work consists in the theoretical analysis and comparison of some organic compounds and its similar inorganics, through the change of the BN pair, and, in some cases, the BP pair, in the place of CC pair. First, ethane, ethene and ethine molecules, organic (with CC pair) and inorganic (with BN and BP pairs), were analysed; they worked as reference for the analysis of organic and inorganic (here, just BN pair) functionalized molecules (ethanol, ethenol and ethanal, ethanoic acid and ethenediol, ethylamine, ethylbenzene, propane and fluoroethane). For ethane, ethene and ethine molecules, dipole moment, population analysis, energy, bond length and molecular orbitals were analysed. In this case, the DFT method (with b3- lyp and pwlda functionals) and HF method were used. For the molecules with functional group (CC and BN), energy, bond length, bond order and a comparison between isomers were done. Here, DFT (b3-lyp) and CC2 methods were used. For all calculations we used TURBOMOLE. So, it was verified that the dipole moment of the reference molecules follows the same tendency of the Löwdin population analysis (corroborating with the idea of the donation of the electrons pair from the basis to the acid – Lewis acid/basis). This analysis presents results coherent with the chemical feeling, although it has limitations because it concentrates the charges over the atoms. For the molecules with functional groups, we verify a bigger bond length, smaller bond energy and smaller bond order (“main” bond) for the inorganic molecules (dative bond) when comparing to organic molecules (common covalent bond). Besides that, BN molecules are more stable than NB ones, although the bond energy of BN molecules is smaller than of the NB ones. And, also, the analysis of bond strength, bond energy and bond order for the B-N bond showed that the functional groups sequence is different according with each inorganic isomer (BN or NB). So, just the analysis of the electronegativity or bond strength doesn’t necessarily lead to correct values of acidity.