A Facebook event collector framework for profile monitoring purposes

Social networks have recently emerged to become vital tools for information and content dissemination among connections. Indeed, the immense increase of number of users of Facebook made it rise to become the largest existing social network with more than 1.2 billion active users. However, these numbers also rose the attention of hackers and attackers who aim at propagating malware and viruses for obtaining confidential information regarding social network users. In this manner, it is crucial that each Facebook user is able to easily access, control and analyse the information shared on the corresponding profile so that profile usage deviations can be more efficiently detected. However, despite the fact that Facebook allows an analysis of all user actions through the Timeline Review, this information is not comprehensively organized and there is no statistical analysis of the user generated data. In this paper, we propose a novel framework comprising a Facebook event collector, which by being provided with an authentication token for a user profile obtained through a Facebook application developed for this purpose, collects all the corresponding posted information and stores it in a relational database for \textit{a posteriori} analysis. Through the graphical interface of the developed application, users can access all stored information in a comprehensible manner, according to the type of event, thus facilitating the analysis of user behaviour. By storing each event with the corresponding timestamp, we are able to perform an efficient and comprehensive analysis of all posted contents and compute statistical models over the obtained data. In this manner, we can create a notion of normal usage profile and detect possible deviations which may be indicative of a compromised user account

Algorithmic Trading Using Long Short-Term Memory Network and Portfolio Optimization

Investors typically rely on a mix of experience, intuition, knowledge of economic fundamentals and real-time information to make informed choices and try to get as high a rate of return as possible. Their decisions are customarily more instinct-driven than methodical. Propelled by the need for numerically inspired judgments, ever stronger within the financial community, in recent years the usage of computational and mathematical tools has been taking root. In this work we used a Long Short-Term Memory (LSTM) Network trained on historical prices to predict future daily closing prices of several stocks listed on the Standard & Poor 500 (S&P500) index. We compared the predictions of our LSTM network with those produced by another state-of-the-art approach, the Hidden Markov Model (HMM), in order to validate our findings. We then fed our forecasts into aMarkowitz Portfolio Optimization (PO) procedure to identify the best trading strategy. The purpose of PO, which allows for simultaneous and optimal trading of multiple stocks, is to compute a set of daily weights representing the portion of initial capital to be invested in each company. Our empirical results highlight two facts: Firstly, our LSTM model achieves higher accuracy than the standard HMM approach. Secondly, by trading various stocks at the same time we can obtain a higher rate of return than is possible by using the single stock strategy, while also greatly enhancing the real-world applicability of our model

A facile way to produce epoxy nanocomposites having excellent thermal conductivity with low contents of reduced graphene oxide

A well-dispersed phase of exfoliated graphene oxide (GO) nanosheets was initially prepared in water. This was concentrated by centrifugation and was mixed with a liquid epoxy resin. The remaining water was removed by evaporation, leaving a GO dispersion in epoxy resin. A stoichiometric amount of an anhydride curing agent was added to this epoxy-resin mixture containing the GO nanosheets, which was then cured at 90 C for 1 h followed by 160 C for 2 h. A second thermal treatment step of 200 C for 30 min was then undertaken to reduce further the GO in situ in the epoxy nanocomposite. An examination of the morphology of such nanocomposites containing reduced graphene oxide (rGO) revealed that a very good dispersion of rGO was achieved throughout the epoxy polymer. Various thermal and mechanical properties of the epoxy nanocomposites were measured, and the most noteworthy finding was a remarkable increase in the thermal conductivity when relatively very low contents of rGO were present. For example, a value of 0.25 W/mK was measured at 30 C for the nanocomposite with merely 0.06 weight percentage (wt%) of rGO present, which represents an increase of *40% compared with that of the unmodified epoxy polymer. This value represents one of the largest increases in the thermal conductivity per wt% of added rGO yet reported. These observations have been attributed to the excellent dispersion of rGO achieved in these nanocomposites made via this facile production method. The present results show that it is now possible to tune the properties of an epoxy polymer with a simple and viable method of GO addition. A

A single prior course of BCNU-cisplatin chemotherapy has a significant deleterious effect on mobilization kinetics of otherwise untreated patients

Extensive prior treatment with cytotoxic agents is associated with impaired mobilization of hematopoietic cells. To assess the effect of a single course of standarddose chemotherapy (CT), we compared the results of filgrastim-induced mobilization among two sequential groups of grade III–IV malignant glioma patients included in a hematopoietic transplantation program. The first group (21 patients) had never been treated with CT until 2 days after surgery, when they received a course of 100 mg/m2 BCNU (IV) and 100 mg intracarotid cisplatin for cytoreduction (not for mobilization). At 1 month after this CT, they were mobilized with 12 lg/kg filgrastim. The second group (22 patients) was mobilized with the same dose of filgrastim directly after the surgery, without having ever received any prior CT. The blood level of CD34þ cells was significantly lower in the CT-treated patients, both on the fourth day of filgrastim (15 vs 36 cells 106/l; P¼0.01) and on the fifth (25 vs 58 cells 106/l; P¼0.003), as it was the number of CD34þ cells collected per apheresis (1.3 vs 3.5 106/l; Po0.0005). The toxic effect of a single course of BCNUcisplatin CT led to significant impairment of the filgrastim-induced mobilization response. Bone Marrow Transplantation advance onlin

Acquired potential N-glycosylation sites within the tumor-specific immunoglobulin heavy chains of B-cell malignancies

Background and Objectives. Among B-cell malignancies, follicular lymphomas (FL) more frequently show acquired, potential N-glycosylation sites (AGS) within tumor-specific immunoglobulin. The aim of this study was to extend this observation and to evaluate the pattern of presentation of AGS within five different forms of B-cell lymphoma. Design and Methods. We sequenced the tumor-specific immunoglobulin heavy chain variable region fragment, including complementarity-determining regions 2 and 3, of forty-seven consecutive patients with a B-cell malignancy enrolled in idiotype vaccine clinical trials. This sequencing approach is known to allow the identification of most AGS. We then statistically analyzed differences in presentation pattern, in terms of tumor histology, immunoglobulin isotype, AGS location and amino acid composition. Results. All twenty-four FL cases presented with at least one AGS, whereas the vast majority of four B-cell lymphoma types other than FL did not. The non- FL group of tumors included four cases of Burkitt’s lymphoma, six of diffuse large cell lymphoma, seven mantle cell lymphomas and six small lymphocytic lymphomas. Most IgM-bearing follicular lymphoma cases featured their AGS within complementarity-determining region 2, as opposed to those bearing an IgG, which mostly displayed the AGS within complementarity- determining region 3. The vast majority of AGS located within either complementarity- determining region ended with a serine residue, whereas those located within framework regions mostly featured threonine as the last amino acid residue. Interpretation and Conclusions. In our series, all cases of FL had AGS within their tumor-specific immunoglobulin heavy chain variable regions. In contrast, most B-cell malignancies other than FL did not. Further studies are warranted in order to establish the possible meaning of these findings in terms of disease pathogenesis, their diagnostic value in doubtful cases and their potential implications for immunotherapy

Comportamento fenológico de acessos de cambuizeiro em zona de tabuleiros costeiros de Alagoas

O cambuí é uma fruteira nativa do Brasil pertencente à família Myrtaceae de elevado valor econômico potencial que merece estudos de preservação, bem como o desenvolvimento de tecnologias que possibilitem o seu cultivo comercial.  A caracterização de acessos de Myrciaria floribunda O. Berg poderia auxiliar o processo de domesticação e possibilitar a seleção de plantas com características agronômicas desejáveis. Este trabalho teve o objetivo de estudar o comportamento fenológico de 195 acessos de cambuizeiros, quanto à variabilidade genética da população, que possam ser empregados em programas de melhoramento genético da espécie. A emissão de novas folhas foi continua durante todo o período de avaliação, sendo mais intensa no final da estação chuvosa e início da estação seca, com maiores intensidades nos meses de julho e outubro, sempre acompanhada da abscisão de folhas velhas. Por outro lado, a frutificação ocorreu nos meses de maiores índices pluviométricos, com maior intensidade em maio com 87,69% dos indivíduos frutificando. A população de plantas apresentou-se altamente sincrônica em todas as fenofases estudadas, tendo em vista que apresentou índices de atividade superiores a 60%. A floração acompanhou a sazonalidade climática influenciada pelo aumento da temperatura e da baixa precipitação pluviométrica. Com relação à frutificação ela é rápida, porém, ocorre de duas a três vezes ao ano, no período de maior precipitação. Os acessos apresentaram variabilidade considerável em relação aos caracteres morfológicos botânicos, mostrando potencial da população para a seleção de materiais com características desejáveis

Recuperación y revalorización de parcelas abandonadas en los regadíos tradicionales de ribera turolenses (RegATeA)

Financiado por Gobierno de Aragón, a través del Fondo de Inversiones de Teruel (años 2019 y 2020), con la participación del Gobierno de España (Ministerio de Política Territorial

TECNOLOGÍAS DE LA INFORMACIÓN Y LA COMUNICACIÓN: LA PERSPECTIVA DE LOS PROFESIONALES DEL SERVICIO MÓVIL DE URGENCIAS Y EMERGENCIAS

Objetivo: evaluar el interés, acceso y conocimiento de los profesionales del Servicio Móvil de Urgencias y Emergencias en relación con las Tecnologías de la Información y la Comunicación en dicho servicio.Método: estudio descriptivo y transversal realizado con profesionales (médicos, enfermeros, técnicos de enfermería y choferes) del Servicio Móvil de Atención de Urgencias del noroeste de Paraná, Brasil, en los meses de septiembre y octubre de 2020. Los datos se recolectaron por medio de un instrumento estructurado y se los analizó a través de estadística descriptiva.Resultados: de los 30 profesionales participantes, el 80% informó tener acceso solamente a un celular simple y el 86,7% cree en la viabilidad de un sistema informatizado que asista en la atención y en el tiempo de respuesta ante el evento.Conclusión: a pesar de la falta de tecnologías dentro del servicio investigado y la insatisfacción de estos profesionales, anhelan tecnologías que agilicen el servicio, generando una reducción en el tiempo de respuesta ante el evento. De esta manera, los resultados pueden sustentar la gestión de los servicios y contribuir en forma positiva a la práctica profesional del equipo del SAMU

TECNOLOGIAS DA INFORMAÇÃO E COMUNICAÇÃO: VISÃO DOS PROFISSIONAIS DO ATENDIMENTO MÓVEL DE URGÊNCIA E EMERGÊNCIA

Objetivo: avaliar o interesse, acesso e conhecimento dos profissionais do Atendimento Móvel de Urgência e Emergência em relação às Tecnologias da Informação e Comunicação no Serviço.Método: estudo descritivo e transversal realizado com profissionais (médicos, enfermeiros, técnicos de enfermagem e condutores) do Serviço de Atendimento Móvel de Urgência do noroeste do Paraná, Brasil, em setembro e outubro de 2020. Os dados foram coletados por meio de instrumento estruturado e analisados por estatística descritiva.Resultados: dos 30 profissionais participantes, 80% relataram acesso apenas a um celular simples e 86,7% acreditam na viabilidade de um sistema informatizado que auxilie no atendimento e no tempo/resposta da ocorrência.Conclusão: apesar do déficit de tecnologias dentro do serviço pesquisado e da insatisfação desses profissionais, estes anseiam por tecnologias que agilizem o atendimento gerando diminuição do tempo/resposta da ocorrência. Assim, os resultados podem subsidiar a gestão dos serviços e contribuir positivamente para a prática profissional da equipe do SAMU