Utilização do granodiorito gnáissico como fonte de potássio na produção de morango/ Utilization of granodiorito gnáissico as potassium source in strawberry production

A produtividade dos frutos do morangueiro é extremamente influenciada pelas práticas de manejo, destacando-se a adubação potássica. A utilização da rochagem pode ser uma alternativa à utilização de adubos químicos solúveis. Dentre as rochas fornecedoras de potássio, destaca-se o granodiorito gnáissico. Em função do exposto, o trabalho foi realizado com o objetivo de avaliar a utilização do granodiorito gnáissico como fonte de potássio para o cultivo do morango. Os tratamentos consistiram das seguintes doses do granodioritio gnáissico: 0; 3; 6; 12; 18 g vaso-1. As características das avaliadas foram as seguintes: produção de frutos; teor de potássio, cálcio e magnésio no tecido vegetal, teor de potássio no solo e teor de potássio no fruto. Os resultados demonstraram que houve uma resposta quadrática da produção de morango às doses de granodiorito gnáissico atingindo uma dose de máxima eficiência técnica de 11,7 g vaso-1. A aplicação do granodiorito gnáissico promoveu aumento nos teores de K no solo, no tecido vegetal e nos frutos do morango. Conclui-se que o granodiorito gnáissico pode ser utilizado como fonte potássica para o cultivo de morango

Pocket Rehab - mHealth-based rehabilitation program for patients with cardiovascular disease as a prevention and treatment strategy for COVID-19 victims : an international multicentric collaborative study

Pacientes com doença cardiovascular e fatores de risco para doença cardiovascular (DCV) têm sido afetados com mais frequência e mais gravemente pelo novo coronavírus. Isso agravou o cenário anterior de subutilização dos programas de reabilitação cardiovascular (RCV) antes da pandemia, exigindo alternativas otimizadas de RCV, como por exemplo aquelas baseadas em aplicativos móveis (mHeath), não apenas por gerar benefícios bem estabelecidos, mas agora também para manter esses pacientes clinicamente estáveis, diminuindo a chance de eventos cardiovasculares e risco de contaminação naqueles não infectados pelo vírus, bem como tratando dos sobreviventes da COVID-19, tendo em vista as disfunções adicionais que tem sido descritas nos sistemas respiratório, cardiovascular e muscular. Serão realizados dois estudos: o estudo 1, qualitativo, de concordância e reprodutibilidade. Criação aplicativo baseado em tecnologia móvel (mHealth), para dar suporte a um programa otimizado (capaz de avaliar após COVID-19) de reabilitação cardiovascular (RCV) em ambiente domiciliar, desenvolvido pela Universidade do Luxemburgo (Centro 4), integrando instrumentos reconhecidos internacionalmente, como o EXPERT Tool, Hasselt University (Centro 3) e PACERProject, University of Miami (Centro 2). O aplicativo será testado e avaliado por profissionais de saúde nos dois centros colaboradores do estudo (Centro 2 e Centro 3) e na instituição executora - Universidade de Brasília (Centro 1)

Secure Architectures for Mobile Financial Applications

This thesis examines the impact of the security and privacy challenges of mobile applications on software engineering paradigms. As mobile apps become central to daily activities, they increase the potential for data breaches and privacy concerns, especially with the rise of services offered through these apps and the use of REST APIs. This work identifies key issues in mobile application ecosystems, such as securing communication channels, protecting data from unauthorized access, and ensuring proper governance over sensitive information shared with third parties. To address these challenges, the thesis proposes leveraging privacy-enhancing technologies, including Trusted Execution Environments (TEE) and Blockchain technology, to secure data transactions and processing. It presents novel methods for analyzing user behavior and detecting anomalies without compromising personal identity, aiming to enhance security and privacy in mobile applications. Key contributions include developing a secure communication channel between mobile apps and TEEs, detecting interests and anomalies in app usage, and conceptualizing a privacy-preserving decentralized super app to improve data governance and privacy. The research underscores the importance of maintaining high security standards in the face of increasing app complexity and user reliance on digital services, offering innovative solutions to enhance privacy and security in the mobile app ecosystem

Autenticação de dispositivos móveis usando NFC

O desenvolvimento de tecnologias móveis tem criado oportunidades para uso de aplicações remotas executando em dispositivos como smartphones. Para algumas dessas aplicações é essencial que a autenticação seja feita de modo seguro e eficiente. Nesse sentido surge o uso da tecnologia NFC (Near Field Communication) para obter segurança para transações executadas em aplicativos móveis. Esse tipo de aplicação é bastante interessante para a realização de comércio eletrônico, bem como controle de acesso a informações sigilosas, como dados bancários, por exemplo. Neste trabalho, apresentam-se dois protocolos para fazer a autenticação de dispositivos através de etiquetas NFC, com técnicas de criptografia assimétrica usando algoritmos de curvas elípticas. Ao longo do texto são apresentados os principais conceitos sobre NFC, criptografia e a classe de web services REST (Representational State Transfer), que serve como padrão para a construção dos protótipos dos protocolos Protecting Touch aqui desenvolvidos. Os detalhes sobre a implementação desses protocolos são também apresentados, assim como resultados de experimentos para sua avaliação.The appearance of mobile technologies created opportunities for remote applications running in devices such as smartphones. In some of these applications it is essential that authentication have to be performed in a secure and e!cient way. In this sense the use of NFC (Near Field Communication) technology came to provide safety to transactions executed through mobile applications. This kind of application is rather attractive to perform electronic commerce, as well as access control for sensitive data, such as banking accounts. In this work it is presented two protocols for user authentication through NFC tags, using asymmetric cryptography by elliptic curves. Throughout the text we present the main concepts about NFC, cryptography and the web services REST (Representational State Transfer), which is used as the building framework for the prototypes of the Protecting Touch protocols presented here. Details about the protocols implementation are also presented, as well as results from the evaluation experiments of these protocols

Towards Privacy Preserving Data Centric Super App

The number of smartphone users recently surpassed the numbers of desktop users on Internet, and opened up countless development challenges and business opportunities. Not only the fact that the majority of users are connected using their smartphones, but the number of Internet users in general has popularized the massive use of data-driven applications. In this context, the concept of super apps seems to be the next game-changer for the mobile apps industry, and the challenges related to security and privacy are key aspects for keeping user data safe. Thus, by combining different components for provisioning, authentication, membership and others, we propose a novel framework that enables the creation of a super app using privacy by design principles

Mobile App to SGX Enclave Secure Channel

The current challenge for several applications is to guarantee the user’s privacy when using personal data. The broader problem is to transfer and process the data without exposing the sensitive content to anyone, including the service provider(s). In this paper, we address this challenge by proposing a protocol to combine secure frameworks in order to exchange and process sensitive data, i.e. respecting user’s privacy. Our contribution is a protocol to perform a secure exchange of data between a mobile application and a trusted execution environment. In our experiments we show independent implementations of our protocol using three different encryption modes (i.e., CBC, ECB, GCM encryption). Our results support the feasibility and importance of an end-to-end secure channel protocol

Event-Driven Interest Detection for Task-Oriented Mobile Apps

Mobile applications became the main interaction channel in several domains, such as banking. Consequently, understanding user behaviour on those apps has drawn attention in order to extract business-oriented outcomes. By combining Markov Chain and graph theory techniques, we successfully developed a process to model the app, to extract the click high utility events, to score the interest on those events and cluster the groups of interest. We tested our approach on an European bank dataset with over 3.5 millions of user's session. By implementing our approach, analysts can gain knowledge of user behaviour in terms of events that are important to the domain

Integrated use of plant growth-promoting bacteria and nano-zinc foliar spray is a sustainable approach for wheat biofortification, yield, and zinc use efficiency

Introduction and aimsThe intensive cropping system and imbalance use of chemical fertilizers to pursue high grain production and feed the fast-growing global population has disturbed agricultural sustainability and nutritional security. Understanding micronutrient fertilizer management especially zinc (Zn) through foliar application is a crucial agronomic approach that could improve agronomic biofortification of staple grain crops. The use of plant growth-promoting bacteria (PGPBs) is considered as one of the sustainable and safe strategies that could improve nutrient acquisition and uptake in edible tissues of wheat to combat Zn malnutrition and hidden hunger in humans. Therefore, the objective of this study was to evaluate the best-performing PGPB inoculants in combination with nano-Zn foliar application on the growth, grain yield, and concentration of Zn in shoots and grains, Zn use efficiencies, and estimated Zn intake under wheat cultivation in the tropical savannah of Brazil.MethodsThe treatments consisted of four PGPB inoculations (without inoculation, Azospirillum brasilense, Bacillus subtilis, and Pseudomonas fluorescens, applied by seeds) and five Zn doses (0, 0.75, 1.5, 3, and 6 kg ha−1, applied from nano ZnO in two splits by leaf).ResultsInoculation of B. subtilis and P. fluorescens in combination with 1.5 kg ha−1 foliar nano-Zn fertilization increased the concentration of Zn, nitrogen, and phosphorus in the shoot and grain of wheat in the 2019 and 2020 cropping seasons. Shoot dry matter was increased by 5.3% and 5.4% with the inoculation of P. fluorescens, which was statistically not different from the treatments with inoculation of B. subtilis as compared to control. The grain yield of wheat was increased with increasing nano-Zn foliar application up to 5 kg Zn ha−1 with the inoculation of A. brasilense in 2019, and foliar nano-Zn up to a dose of 1.5 kg ha−1 along with the inoculation of P. fluorescens in the 2020 cropping season. The zinc partitioning index was increased with increasing nano Zn application up to 3 kg ha−1 along with the inoculation of P. fluorescens. Zinc use efficiency and applied Zn recovery were improved at low doses of nano-Zn application in combination with the inoculation of A. brasilense, B. subtilis, and P. fluorescens, respectively, as compared to control.DiscussionTherefore, inoculation with B. subtilis and P. fluorescens along with foliar nano-Zn application is considered a sustainable and environmentally safe strategy to increase nutrition, growth, productivity, and Zn biofortification of wheat in tropical savannah