Progetto di un amplificatore operazionale di transconduttanza di tipo current mirror

Studio e progettazione di un OTA current mirror in tecnologia CMOS. Simulazione del circuito per la verifica della funzionalità e del rispetto delle specificheope

Educação Estatística no Ensino Médio: A Leitura de Gráficos

Neste artigo, apresentamos um estudo sobre a leitura de gráficos estatísticos em uma sala de aula com o objetivo de analisar a produção de significados dos alunos envolvidos na resolução de tarefas. A investigação de cunho qualitativo foi referenciada teoricamente pelo Modelo dos Campos Semânticos, que possibilitou a análise das ações enunciativas dos estudantes do ensino médio de uma escola pública da rede estadual na cidade de Juiz de Fora (MG). A análise evidenciou que as tarefas cumpriram a função de estimular os estudantes a produzir significados indicando um processo de aprendizagem que foi desencadeado a partir da leitura de dados estatísticos expressos por gráficos

Synthesis and electrochemical characterization of Si/TiO2/Au composite anode: Efficient oxygen evolution and hydroxyl radicals generation

This paper describes the photoelectrochemical properties of a novel composite anode composed of a 200 nm Au-Sb ohmic contact/300 μm n-Si wafer/20 nm TiO2 /120 nm Au grid. By connecting the Au ohmic contact to the gold grid via a power supply, holes thermally or photochemically generated in the Si are launched to the TiO2 surface where they are converted to •OH radicals. We show that the Si/TiO2/Au composite anode can be efficiently employed in the oxygen evolution reaction and prove that the anode generates hydroxyl radicals (using p-nitrosodimethylaniline as a probe). Potential applications include the photoelectrocatalytic oxidation of organic contaminants, water splitting, and organic electro-synthesis

Accesible co-creation tools for people with intellectual disabilities: working for and with end-users

[EN] In a world defined by rapid change, the search for solutions to societal challenges has become more complex calling for new paradigms of innovation focused on collaborations with the community and users. Cocreation approaches in the design and production of a service or product can bring low-cost innovation and unique and personalized customer experiences leading to user acceptance of a product or service. Under a co-creation perspective, the participatory approach developed in the MINDInclusion project aims to improve the inclusion of people with intellectual disabilities into public places and society by using a co-created online tool based on personal experiences of people with disabilities. Paying special attention to the Design thinking method, the main goal of this experience was to co-create cognitive accessible design tools that guide the collection of users and other stakeholders experiences in the process of defining problems and solutions. To this end, 14 researchers and educators worked defining together a set of guiding exercises and design thinking methods for the 4 co-design cycles. As a result two tools were developed to gather information to recreate as a final output “personas scenarios”, an “empathy map” and expected “use scenarios”. The former was an adapted game board about public places based on the traditional monopoly game and the latter a diary with a set of activities that will facilitate the collection of contextual information. Previous experiences have shown that co-design process can promote greater social cohesion, acceptance and empowerment. Working with people with intellectual disability presents several challenges since the co-creation process needs to be cognitive accessible. However, the tools created under this experience can be extrapolated to other contextsAlmeida, R.; Losada Durán, R.; Cid Bartolomé, T.; Giaretta, A.; Segalina, A.; Bessegato, A.; Visentin, S.... (2020). Accesible co-creation tools for people with intellectual disabilities: working for and with end-users. Editorial Universitat Politècnica de València. 53-61. https://doi.org/10.4995/INN2019.2019.10086OCS536

Fermented beverage based on water-soluble soybean extract

Functional foods are those that, beyond basic nutrition, promote health benefits. This study aimed to produce a fermented beverage from a water-soluble soybean extract and low-lactose semi-skimmed milk. The beverage was prepared using a blend (v/v) containing 62% water-soluble soybean extract, 33% low-lactose semi-skimmed milk, and 5% of an inoculum containing Lactobacillus delbrueckii subsp. bulgaricus and Streptococcus salivarius subsp. thermophilus. The fermentation was carried out with monitoring of the lactic acid bacteria (LAB) counts, pH, and titrable acidity (% lactic acid). The consumption-ready fermented beverage was added  of strawberry syrup and posteriorly characterized by its centesimal composition and sensory attributes as appearance, aroma, flavour, texture, overall impression, and purchase intent. Additionally, the LAB count and presence of pathogens in the final product were evaluated. After 14 h of fermentation, the refrigerated product presented L. bulgaricus and S. thermophilus counts of 8.5 × 103 and 7.4 × 107 CFU/mL, respectively. The product contained 14.93% carbohydrates, 0.76% fats, 0.96% ash, 22.76% total solids, and 2.19% protein. Because the product did not present any pathogens, it was adequate according to the standards of microbiological safety determined by Brazilian legislation. Regarding the sensory evaluation, the panelists assigned a mean score of 7.0 for the attributes evaluated, indicating ‘liked moderately’ to the drink. In addition, 61% of the evaluators responded that they ‘certainly or probably would buy’ the product if it were available on the market

Progetto di un amplificatore operazionale di transconduttanza di tipo current mirror

Studio e progettazione di un OTA current mirror in tecnologia CMOS. Simulazione del circuito per la verifica della funzionalità e del rispetto delle specifich