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Affichage des articles triés par pertinence pour la requête how to. Trier par date Afficher tous les articles

24 mai 2013

Éducation

L'éducation est un sujet qui prend de plus en plus de place dans ma tête. Je vais essayer de coucher quelques idées sur le sujet. Voici d'abord un petit vidéo d'Andreas Schleicher sur TED.

 

Voici quelques extraits qui me font réfléchir :
One way you can spend money is by paying teachers well, and you can see Korea investing a lot in attracting the best people into the teaching profession. And Korea also invests into long school days, which drives up costs further. Last but not least, Koreans want their teachers not only to teach but also to develop. They invest in professional development and collaboration and many other things. All that costs money. How can Korea afford all of this? The answer is, students in Korea learn in large classes. [...] You go to the next country on the list, Luxembourg, and you can see the red dot is exactly where it is for Korea, so Luxembourg spends the same per student as Korea does. But, you know, parents and teachers and policymakers in Luxembourg all like small classes. You know, it's very pleasant to walk into a small class. So they have invested all their money into there, and the blue bar, class size, is driving costs up. But even Luxembourg can spend its money only once, and the price for this is that teachers are not paid particularly well. Students don't have long hours of learning. And basically, teachers have little time to do anything else than teaching. So you can see two countries spent their money very differently, and actually how they spent their money matters a lot more than how much they invest in education.
Il semble que que la taille des classes ne soit pas un facteur aussi important qu'on pourrait le croire. C'est plus nuancé que ça. Pourrions-nous imaginer un modèle plus éclaté? Pas de classe? Des classes de 100000 étudiants? Toutes ces réponses?
Everybody agrees that education is important. Everybody says that. But the test of truth is, how do you weigh that priority against other priorities? How do countries pay their teachers relative to other highly skilled workers? Would you want your child to become a teacher rather than a lawyer? How do the media talk about schools and teachers? Those are the critical questions, and what we have learned from PISA is that, in high-performing education systems, the leaders have convinced their citizens to make choices that value education, their future, more than consumption today. And you know what's interesting? You won't believe it, but there are countries in which the most attractive place to be is not the shopping center but the school. Those things really exist.
J'espère que mes enfants vont grandir dans un monde où l'on valorise plus les enseignants que les avocats.
But placing a high value on education is just part of the picture. The other part is the belief that all children are capable of success. You have some countries where students are segregated early in their ages. You know, students are divided up, reflecting the belief that only some children can achieve world-class standards. But usually that is linked to very strong social disparities. If you go to Japan in Asia, or Finland in Europe, parents and teachers in those countries expect every student to succeed, and you can see that actually mirrored in student behavior. When we asked students what counts for success in mathematics, students in North America would typically tell us, you know, it's all about talent. If I'm not born as a genius in math, I'd better study something else. Nine out of 10 Japanese students say that it depends on my own investment, on my own effort, and that tells you a lot about the system that is around them.
Il suffit de lire Outliers de Malcolm Gladwell pour saisir l'impact d'une ségrégation. Je suis si heureux d'être né en février...
[...] what makes Finland so impressive is that only five percent of the performance variation amongst students lies between schools. Every school succeeds. This is where success is systemic. And how do they do that? They invest resources where they can make the most difference. They attract the strongest principals into the toughest schools, and the most talented teachers into the most challenging classroom.

Un pays où les plus forts choisissent les plus grands défis. Le Canada se classe bien en éducation comparativement aux autres pays. On a une bonne base, on est parmi les plus fort... il faut s'attaquer au défi de l'éducation!

12 mai 2010

How to Optimize Maturation in a Bioreactor for Vascular Tissue Engineering: Focus on a Decision Algorithm for Experimental Planning

Mon article "How to Optimize Maturation in a Bioreactor for Vascular Tissue Engineering: Focus on a Decision Algorithm for Experimental Planning" a été accepté dans la revue Annals of Biomedical Engineering. Vous pouvez le télécharger à cette adresse si vous êtes abonnés, par exemple via votre université ou bibliothèque ou ici sur pubmed.

Voici le résumé de l'article :

"Bioreactors may become essential tools for developing tissue-engineered organs from cells, with or without scaffolds. Cells seeded in these devices are expected to grow and form a tissue. Up to now, one of the main challenges to successfully develop functional organs is the structural organization of the cells into the scaffold during maturation in the bioreactor. The maturation step is affected by a set of highly interlinked dynamical variables (flow, stress, pH, temperature, and growth factors) in such a way that fixing the optimal environmental conditions becomes very complex. This work focuses on how the experimental parameters in the bioreactor can be optimized through numerical modeling to maximize tissue growth. Genetic programming (GP) and Markov decision processes (MDPs) were used in synergy to generate and take full advantage of a model of the vascular construct growth. The approach consists in formulating a model through GP to explain the growth of the construct and using MDPs to come up with a strategy to yield the best results in the experimental runs. Construct growth was improved, and the regeneration process was better understood in numerical simulations that relied on this control system. Therefore, an advanced numerical controller of this type could become an effective and inexpensive tool for planning experimental work in tissue engineering."


Essentiellement, je montre que l'on peut calculer les meilleures conditions de culture dans un bioréacteur pour le génie tissulaire en utilisant quelques méthodes mathématiques (1) pour planifier les expériences afin d'étudier le système et (2) prendre des décisions séquentielles concernant les conditions de culture. Ce que cela apporte à mon domaine, c'est l'idée de calculer mathématiquement plutôt que de poser arbitrairement les paramètres pour faire grandir les tissus en laboratoire. Finalement, je montre par des simulations numériques qu'en utilisant cette approche on obtient bel et bien une croissance plus rapide.



Publié par : Frédéric Couet

31 octobre 2007

Pourquoi les fils RSS?

Est-ce que les fils RSS sont faits pour vous?

Si vous aimez naviguer sur Internet, visiter des pages et faire des découvertes (bref surfer), alors les fils RSS ne sont pas faits pour vous. Si au contraire, vous trouvez que vous passer déjà beaucoup de temps à naviguer sur la toile et que vous aimeriez être plus efficace pour gagner quelques minutes chaque jour, alors les fils RSS sont pour vous.

Vous vous abonnez aux fils pour ne pas avoir à aller chercher l’information. Celle-ci vient à vous. Les fils RSS sont un outil efficace pour suivre un sujet scientifique (vous pouvez vous abonner aux fils des revues scientifiques), d’actualité ou les états d’âmes de vos amis. Toujours dans un esprit d’efficacité et de rapidité à assimiler la nouvelle.

Comment cela fonctionne?

Il suffit de se procurer un agrégateur, par exemple Google Reader, puis de s’abonner aux flux RSS qui nous intéressent. Les nouvelles seront récupérées par votre agrégateur. Vous pourrez les lire comme vos courriels. Vous n’aurez donc plus à visiter mon site chaque jour pour voir si j’y ai écrit un billet. Les billets seront envoyés directement chez vous!

Pour vous abonner à un flux, il suffit de trouver l'image suivante :




et de suivre les instructions.


♦ ♦ ♦

Are RSS feeds made for you?

If you like to “surf” on the net, discover some new pages; if Internet is an activity, then RSS is not made for you. On the other hand, if you believe you already take enough time on the net and would like to be more efficient, then RSS may be for you.

You subscribe to RSS because you want the information you seek on the net automatically delivered to you. This is a tool to quickly follow scientific evolution, news, or even the moods of your blogger friends.

How does it work?

You need a feed aggregator, for example Google Reader or FeedReader. Then you simply subscribe to the feed you are interested in. The articles you are eager to read will come directly to you.


To subscribe to the RSS, simply find and click the following image:




and follow instructions.


Publié par : Frédéric Couet

4 avril 2013

This is the root

"There are a thousand hacking at the branches of evil to one who is striking at the root."
 -Henry David Thoreau

J'ai écouté une présentation magistrale de Lawrence Lessig. Son style de présentation est magnifique. C'est l'état de l'art avec un mixte de rationnel et d'émotion. Des diapositives qui ont l'air faites par une équipe en communication. Un style où les diapos défilent rapidement pour créer un rythme entraînant. Un appel à l'action puissant. Bref, c'est très bien.

Dans la présentation, on discute du financement des partis politiques, un sujet assez chaud au Québec. «Larry» discute du cas des États-Unis. Ce qui m'accroche le plus, c'est ce passage où il explique la place de l'amour comme force motrice dans notre désir d'améliorer les choses, même lorsque tout semble sans espoir.

I spoke at Dartmouth once, and a woman stood up after I spoke, I write in my book, and she said to me, "Professor, you've convinced me this is hopeless. Hopeless. There's nothing we can do." When she said that, I scrambled. I tried to think, "How do I respond to that hopelessness? What is that sense of hopelessness?" And what hit me was an image of my six-year-old son. And I imagined a doctor coming to me and saying, "Your son has terminal brain cancer, and there's nothing you can do. Nothing you can do." So would I do nothing? Would I just sit there? Accept it? Okay, nothing I can do? I'm going off to build Google Glass. Of course not. I would do everything I could, and I would do everything I could because this is what love means, that the odds are irrelevant and that you do whatever the hell you can, the odds be damned.

Je pense qu'on choisit d'aimer. Quand on fait ce choix, ça change les gens et peut-être les sociétés.




Un autre passage intéressant, c'est lorsqu'il explique l'importance de son problème.

So it's not that mine is the most important issue. It's not. Yours is the most important issue, but mine is the first issue, the issue we have to solve before we get to fix the issues you care about. No sensible reform, and we cannot afford a world, a future, with no sensible reform.

Certains sujets sont importants simplement parce qu'ils représentent des fondations pour construire quelque chose de bien. Si le système est cassé, alors tous nos efforts peuvent paraître «definitely and finally salao».

13 avril 2009

In a dignified manner


"We have a habit in writing articles published in scientific journals to make the work as finished as possible, to cover all the tracks, to not worry about the blind alleys or to describe how you had the wrong idea first, and so on. So there isn't any place to publish, in a dignified manner, what you actually did in order to get to do the work, although, there has been in these days, some interest in this kind of thing."


Publié par : Frédéric Couet

14 septembre 2010

The scientific method (for higher education)

A quick search for "scientific method" on Google gives the following result :


No matter how hard I try to find some flowchart, hierachical chart, mindmap or diagram describing the real thing, I always find explanations for highschool... So I decided to make a more complex diagram. I used VUE (Visual Understanding Environment) to develop de diagram. Here is a preview of the file.



The chart is an ongoing project. You can download the PDF file which is more zoomable than the preview from Google. In the future, I would like to add a lot of details on motivation, team management, and communication. Finally note that I am not an expert in statistical tests and complex data analysis, therefore use this part of the mindmap with care!

Publié par : Frédéric Couet

10 juin 2010

Cinq kilomètres de course comme un bébé

Voici la petite histoire de l'une de mes courses racontée à travers mon iPod. D'abord, je suis au repos. Battement cardiaque... 70 BPM. C'est environ le rythme du coeur d'un embryon de 4 semaines. Je m'étire et je sors. C'est excellent de sentir les rayons du soleil à travers les arbres. Il faut dire que je descends une côte alors pour courir, c'est grisant.

It's a beautiful day, sky falls, you feel like t's a beautiful day, Don't let it get away.
U2 - All That You Can't Leave Behind - Beautiful Day

LA question qu'il faut toujours se poser : POURQUOI? Pourquoi cours-je? Pourquoi vais-je travailler? Pourquoi écris-je ces mots? (Toutes ces inversions sujet-verbe me rendent mal à l'aise!) C'est toujours la question la plus importante. Pourquoi concevoir un bioréacteur? Pourquoi faire un doctorat?

The goal is elevation U2 - All That You Can't Leave Behind - Elevation

140 BPM, je m'éloigne tranquillement de chez moi où se trouvent des gens que j'aime très fort!

My world crumbles when you are not near Macy Gray - On How Life Is - I Try

Seulement, je ne pars pas longtemps et je pense à eux...

I'm so glad you're here Macy Gray - Big - Glad You're Here

Je tourne un coin de rue. 155 BPM. Je prends ma vitesse d'allée. Mes jambes sont réchauffées et je pense de moins en moins!

The soul's escaping, through this hole that it's gaping. This world is mine for the taking. Make me king. Eminem - Curtain Call - The Hits (Deluxe Version) - Lose Yourself

165 BPM. C'est le rythme cardiaque d'un foetus de 20 à 40 semaines environ. Après la naissance, le rythme cardiaque va diminuer tranquillement. Un bébé, c'est curieux : ça fait chanter!

How the fuck can I raise a little girl. They say music can alter moods and talk to you Eminem - The Eminem Show - Sing for the Moment

Comment éduquer une petite fille? Comment faire plaisir aux gens que j'aime? Comment être heureux dans la vie? Comment ne pas me perdre?

Relax, take it easy Mika - Life In Cartoon Motion - Relax, Take It Easy

Ça va plutôt bien, au moins j'ai retrouvé mon chemin jusqu'à la maison et mon genou a survécu à un autre 5 km.

Publié par : Frédéric Couet