Proceedings of the European MOOC stakeholder summit 2015

RESCIF is a French-speaking network with 14 faculties of technology from the North and from the South. One of their research themes is water and four partner institutions decided to build together a MOOC as tentative tool for disseminating knowledge and contribute to education of southern engineers. This MOOC “Rivers and Men” is thus an example of collaborative work. The paper gives some facts about the building process and the success of the course. Some reflections are proposed about the target and the actual audience and some preliminary conclusions are drawn about advantages and limitations of such collaborative approach

The 3D printing of a polymeric electrochemical cell body and its characterisation

An undivided flow cell was designed and constructed using additive manufacturing technology and its mass transport characteristics were evaluated using the reduction of ferricyanide, hexacyanoferrate (III) ions at a nickel surface. The dimensionless mass transfer correlation Sh = aRebScdLee was obtained using the convective-diffusion limiting current observed in linear sweep voltammetry; this correlation compared closely with that reported in the literature from traditionally machined plane parallel rectangular flow channel reactors. The ability of 3D printer technology, aided by computational graphics, to rapidly and conveniently design, manufacture and re-design the geometrical characteristics of the flow cell ishighlighted

Matemática, Literatura & Aulas

A aprendizagem da Matemática não ocorre por mera transmissão de saberes do professor para os alunos. A ideia de que o conhecimento pode passar linearmente de uma cabeça – daquele que sabe – para outra(s) cabeça(s) – para aqueles que querem saber –, pelas palavras ditas e escritas, não tem qualquer correspondência com a realidade. A aprendizagem é um processo adaptativo, simultaneamente individual e coletivo, baseado na ação e na reflexão, no qual a comunicação tem um papel fundamental, na medida que permite estabelecer ligação entre as pessoas

Can Food Stamps Do More to Improve Food Choices? An Economic Perspective

Food stamp recipients, like other Americans, struggle with nutrition problems associated with choice of foods, as well as amounts. This series of Economic Information Bulletins compiles evidence to help answer the question of whether the Food Stamp Program can do more to improve the food choices of participants. It examines the role of affordability and price of healthful foods in influencing food choices and the likely success of any policy targeted at changing food choices through food stamp bonuses or restrictions. It also examines other approaches to changing food choices, including nutrition education and potential strategies drawn from behavioral economics literature. Meaningful improvements in the diets of food stamp recipients will likely depend on a combination of many tactics. Measuring the effect of any policy change on food choices and health outcomes remains a challenge.Food Stamp Program, food consumption, food prices, food expenditures, nutrition education, behavioral economics, food choices, diet, health, fruits and vegetables, Food Assistance and Nutrition Research Program, FANRP, ERS, USDA, Agricultural and Food Policy, Consumer/Household Economics, Food Consumption/Nutrition/Food Safety, Institutional and Behavioral Economics,

Identificação de deficiências nutricionais do guaraná.

Procuraram-se evidenciar os sintomas de deficiência nutricional do guaraná. Com este objetivo, plantas de guaraná foram cultivadas em substrato de areia lavada e supridas com solução nutritiva completa (todos os nutrientes) e com soluções de um elemento omitido para teste de deficiência. Quando os sintomas foram constatados, realizou-se a documentação fotográfica e a interpretação visual das deficiências. Assim, foi possível elaborar uma chave indicadora da carência de N, P, K, Ca, Mg, S, Cu, Mn, Zn, Fe, B e Mo em plantas de guaraná.bitstream/item/33534/1/CPATU-CirTec13.pd

Validating silicon polytrodes with paired juxtacellular recordings: method and dataset

Cross-validating new methods for recording neural activity is necessary to accurately interpret and compare the signals they measure. Here we describe a procedure for precisely aligning two probes for in vivo “paired-recordings” such that the spiking activity of a single neuron is monitored with both a dense extracellular silicon polytrode and a juxtacellular micropipette. Our new method allows for efficient, reliable, and automated guidance of both probes to the same neural structure with micrometer resolution. We also describe a new dataset of paired-recordings, which is available online. We propose that our novel targeting system, and ever expanding cross-validation dataset, will be vital to the development of new algorithms for automatically detecting/sorting single-units, characterizing new electrode materials/designs, and resolving nagging questions regarding the origin and nature of extracellular neural signals