segunda-feira, 27 de agosto de 2012

Bicicleta Voadora pode alcançar até 5 metros

  
Under each side propeller unit is a telescopic damper that extends before take-off and at ...
Um protótipo virtual da bicicleta voadora foi apresentado nesta quinta-feira (24/05/2012) em Praga. De acordo com o projeto em 3D, a invenção desenvolverá uma potência de 47 quilowatts a cada pedalada e chegará a uma altura máxima de cinco metros. O peso da bicicleta será de 85 kg sem o piloto e a carga máxima 170 kg. O tempo de voo previsto é de três a cinco minutos, e a velocidade máxima alcançará 50 km/h. O modelo será apresentado em setembro na Feira Internacional de Maquinaria de Brno (República Tcheca). 

Early climb-in frame design that was abandoned due to problems with rider/pilot position a...












Fonte:  UOL Notícias -

Voo de Batman é fisicamente impossível


Estudos indicam que Batman morreria ao pousar com sua capa. 

Uso de paraquedas seria uma alternativa



por Redação Galileu
Editora Globo
Batman Fail: apesar de elegante, o voo de Bruce Wayne resultaria em uma morte certeira //Crédito: Universidade de Leicester
Batman - O Cavaleiro das Trevas Ressurge é um dos filmes mais aguardados de 2012. Enquanto o dia da estreia não chega – a produção deve ser lançada no Brasil dia 27 de julho – seus fãs vão matando a ansiedade do jeito que dá. Isso inclui estudantes de física esmiuçando a veracidade das acrobacias do homem-morcego. E chegando à conclusão: o Batman morreria toda vez que aciona sua capa.
Ok, se trata de uma ficção. Em nenhum momento o filme se propõe a traçar o retrato fiel de um milionário complexado que usa uma armadura para combater o crime. Quem vai ao cinema sabe que é tudo de mentirinha. Mas é aí que está a graça da empreitada dos estudantes da Universidade de Leicester: analisando, medindo e calculando o voo do Batman, dá pra ter uma ideia do que aconteceria na vida real se ele tentasse fazer o mesmo. E do quanto falta para aquelas cenas fantásticas se tornarem realidade fora da telona.
Eis o cálculo: a envergadura da capa é de 4,7 metros. Parece bastante, mas é mais ou menos metade do tamanho de uma asa-delta. Se ele saltasse de um edifício de 150 metros – quem já leu as HQ´s ou viu os filmes sabe que Gotham City é cheia de prédios desse porte – ele conseguiria plainar por cerca de 350 metros. Ele voaria tranquilamente, o problema é a hora de pousar. A velocidade da queda começaria em 109km/h e diminuiria aos poucos. No final das contas, seria como se um carro a 80km/h batesse de frente com o Cavaleiro das Trevas. No estudo, os estudantes sugerem que o super-herói carregue um paraquedas, utilize um wingsuit ou aumente o tamanho da capa para pousar com segurança.

BICICLETA DE PAPELÃO


Israelense desenvolve bicicleta de papelão

por motonline | 03.08.2012

 Projeto pode revolucionar mercado de bikes

Uma bicicleta diferente, feita de papelão, funcional e resistente, pode transformar a indústria ciclística. O projeto é do israelense Izhar Gafni,  que criou uma versão própria para o veículo mais vendido em sua comunidade, Bror Hayil, usando uma base de papelão reciclado.
O projetista construiu uma bicicleta 100% ecológica, que custa entre US$ 9 a US$ 12 para ser produzida, e que tem potencial para custar até US$ 90 no varejo.  A bike de papelão é resistente e pode carregar pessoas de até 140kg. O design também é atraente. Bom negócio para investidores e consumidores, a bicicleta de papelão se encaixa perfeitamente no conceito de sustentabilidade. Izhar Gafni conta que todos achavam sua ideia impossível de ser concretizada.
Preço da bike de papelão chega a U$90
Preço da bike de papelão chega a U$90
“Quando comecei a perguntar para engenheiros sobre a possibilidade de produzir uma bike de papelão, todos me mandaram embora dizendo que era impossível. Um dia, assistindo a um documentário sobre a construção do primeiro avião Jumbo, vi que diziam para o engenheiro chefe do projeto que aquela construção também era impossível. Isso me motivou a experimentar diferentes tipos de papelão”, explica o criador da bicicleta.
Izhar Gafni ainda não tem data para começar a produzir as bicicletas em série, mas já conversa com investidores para concretizar seu sonho. Em cidades onde a necessidade por bikes cresce a cada dia, um projeto como esse pode transformar a vida de muitas pessoas vivendo em médias e grandes cidades do planeta.
Fonte: Centro de Mídia Brasil-Israel
 




quarta-feira, 1 de agosto de 2012

DESAFIO







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ACESSE TAMBÉM: http://www.smh.com.au/technology/technology-news/facebooks-privacy-lie-aussie-exposes-tracking-as-new-patent-uncovered-20111004-1l61i.html

"Options for users to preserve the privacy standards they have established have become confusing, impractical and unfair". 

Facebook founder shows off the new Facebook profiles at the F8 conference last week.
  
 
Copyright 2011 Richard Stallman

Facebook 


Facebook is not your friend. Its "real name" policy is enough reason to refuse to use it, but there is so much more nastiness in Facebook. I don't use it, and you shouldn't either.

Facebook makes a practice of telling users to rat on their friends who use aliases.
I think we can formulate the principle that any social network that asks its members for information about other people is abusive.

Unfriend Facebook now — you are its product, not its customer.

Facebook says that a user can't have Facebook's data about him, because it's a trade secret.

Pages that contain Facebook "like" buttons enable Facebook to track visitors to those pages. Facebook tracks the users that see 'like' buttons, even users who never visited facebook.com and never click on those buttons.
The ACLU has a way of enabling users to click a Facebook "like" button, which avoids this problem. Its pages have a link called "like us on Facebook" that leads to a Facebook page where it is possible to push a "like" button for the ACLU. But if you don't follow that link, Facebook gets no information about your visit to the ACLU page.
Here's an example of the practice.

Facebook exploits its users by conscripting them for ads.
Facebook settled a lawsuit by promising users will be able to "limit" this use of their names and photos in ads shown to other users. However, since this is "opt-out", by default users will still be exploited. What's more, it may not even be a complete opt-out.

Don't depend on Facebook to store any data that you might miss if Facebook takes it away from you.

A German regulator says that Facebook's face recognition is illegal.

Social networks, for lonely people, may only show them how lonely they are.

Facebook blocked links to the humor site lamebook which facebook is trying to crush.
This shows how it is a bad thing that so many people use facebook pages instead of setting up their own sites using many different providers.
Facebook messaging further threatens user privacy.

Don't use Facebook. Facebook permanently records everything you do, even what you look at, even items that are "deleted". And presumably gives them to the CIA. A timeline shows how Facebook has increasingly shown contempt for privacy.
EFF says that "the answer" is to complain to Facebook. I suggest another answer: don't put your personal information in Facebook. If you use Facebook at all, just tell people how to contact you in other ways.

A convicted blackmailer who helped Putin crush independent media in Russia now owns a large stake in Facebook.

Facebook deleted a statement by a human rights group, then said that was a mistake.
That Facebook invited the group to post the statement again — instead of undoing the deletion — demonstrates arrogance.
However, the problem here goes deeper. It is not good for human rights groups (or anyone's) statements to be posted using a platform where statements are censored.

Facebook deleted a photo of two men kissing, which was used to support a kiss-in in a pub that had shown bias against gays.
The person who posted it thinks that Facebook is not anti-gay, but rather than it is quick to censor whatever someone complains about.
While it might seem that the former would be worse, I think the latter makes facebook really dangerous. Don't use Facebook as a substitute for your own web site!

Facebook has mysteriously closed several pages of anti-budget-cut activists in the UK.

Facebook has turned on automatic face recognition on photos.
Facebook says that it only suggests identifications for faces in photos for people who are the user's friends. However, it might run the algorithm over every photo posted and not publicly announce the results.
I ask people not to post photos of me on Facebook.

Now Facebook tells your "friends" everything that you do using a large collection of other network services.
This will at least give people an idea of how much information those services tell Big Brother about all their users.

Facebook asks its users to provide their entire list of other people's email addresses.
This by itself is surveillance of those other people, but Facebook uses it to go further and try to guess the relationships of people who are not Facebook users.
That information must be worth some money to companies. It is surely worth money to the secret police of any country that isn't democratic enough.
However, principal wrong here is not that Facebook can guess which non-users know you or me. It is that Facebook collects information from its users about whether they know you or me.
I think we can formulate the principle that any social network that asks its members for information about other people is abusive.

Facebook apps have access to that user's information — and the users' ffiends' information, too. Thus, if you make the mistake of using Facebook, even if you let a company access your data, any of your ffiends can give the company access to your data.
(Although Facebook uses the term "friends", that is an abuse of language; a user's "friends" are often not really friends, and being "friends" on Facebook is not the way to treat a friend anyway. Therefore I propose the replacement term "ffiends", replacing the "r" with the "f" of Facebook.)

"Logging out" of Facebook does little to stop its surveillance.
In particular, every page with a "like" button still knows who you are.
Facebook made changes in response to this article, to delete one cookie that identified the users. It seems there are two other cookies which also identify the user, but Facebook says users should not object to them because they are made for benign purposes.
If that is true, so what? They still track you, unless you stop using Facebook, and delete all its cookies for good and all.
But Facebook can track you through your IP address too, if you don't use TOR to disguise that. To avoid being tracked by Facebook "like" buttons, you need to block your browser from showing them or accessing the Facebook page that generates them. This is necessary if you ever used Facebook from that IP address, even if you stop using Facebook, and delete all its cookies for good and all.

This page gives details about how much facebook tracks users' browsing, which applies even to users that don't have facebook accounts.

Facebook tries to discourage users from visiting other web sites.
(This article uses the word "content" to refer to published works. I think that is a bad practice since that term disparages the works. See.)

More on how much facebook tracks users.

The US Federal Trade Commission ruled that Facebook's violation of its stated privacy policies was illegal.
It is proper to make Facebook keep its promises, but this does not go far enough to make Facebook acceptable to use. It does not limit Facebook's data collection — for instance, it doesn't stop Facebook from collecting of data about browsing through "Like" buttons. It only limits what Facebook can do with that data, and certainly does not stop Facebook from handing it over to Big Brother under the U SAP AT RIOT act.

Facebook in Europe may be required to discard some user data after a time, without sending it to the US.
This may reduce the harm that Facebook does, but is not even close to enough to make it ethically acceptable. Most of the criticisms reported in this site remain valid.

Anyone can get a Facebook user's personal information by buying ads on Facebook.

It appears Facebook spontaneously sends phone messages to people in India who have had no connection with Facebook. This user is trying to find out why.

Facebook is not just surveillance. It also does censorship of photos based on prudish criteria.

Number of friends on Facebook measures narcissism.

Facebook has put an outrageous trademark claim on the word "book" into its terms of service.
To be dependent on Facebook, or any other specific company you could not replace with another, is to make yourself vulnerable to unbounded legal aggression. Don't be a fool — unfriend Facebook today rather than accept these terms.

Facebook "apps" that some persons run get access to everything their "friends" make visible to them, and may hand all that info to a company.
While this article shows that there is currently a way to turn that off, I expect that Facebook will take any necessary steps to ensure that most users don't do so. The purpose of those apps is to get access to that data, and I'm pretty sure that benefit figures, to Facebook's advantage, into the financial arrangements between the app developer and Facebook. Facebook will make sure it does not lose that advantage.

Facebook has a history of blocking the posting of links about certain controversial political issues.
Facebook sends political messages as coming from people who have clicked Like buttons.
Facebook recently settled a lawsuit, promising to stop a very similar practice involving ads, but these political messages are not considered "ads" and Facebook continues to send them.

A credit agency in Germany plans to evaluate people's creditworthiness by who their “friends” are on facebook.
The lesson is that we should make sure that no activities collect information about lots of people's social networks.

Facebook is sneakily leading users to send email to other users via facebook.

Facebook has automatically pushed users' @facebook.com email addresses (which they never asked for) into the contact lists in other people's phones.
The lesson here is that it is a fundamental mistake to trust a company such as Facebook to give anyone data about you. It will give them the data it wants them to have, not the data you want to give them.

Facebook: the most congenitally dishonest company in America.

Copyright 2011 Richard Stallman released under Creative Commons Attribution Noderivs 3.0 unported



 http://owni.eu/2012/07/24/facebook-added-informant/
http://www.smh.com.au/technology/technology-news/facebooks-privacy-lie-aussie-exposes-tracking-as-new-patent-uncovered-20111004-1l61i.html



"Jin Ji Du Li" - Uma prática para prevenir o envelhecimento e perda de memória


Eis o exercício:
Fique sobre uma só perna, com os seus olhos abertos. É só isso.
Parece fácil, certo?

Experimente agora fechar os olhos.

Se você não for capaz de ficar em pé por pelo menos 10 segundos seguidos, significa que seu corpo se degenerou ao nível de 60 a 70 anos de idade. Em outras palavras, você pode ter apenas 40 anos de idade, mas seu corpo envelheceu muito mais rápido.

Ficar sobre um pé com os olhos abertos, é uma coisa e  fazer o mesmo com os olhos fechados ... a história é outra!

Não precisa levantar muito a perna. Se os seus órgãos internos estão fora de sincronia, mesmo levantando a perna um pouco vai fazer você perder o seu equilíbrio.

A prática frequente e regular do "Jin Ji Du Li", pode ajudar a restaurar o sentido de equilíbrio. Na verdade, os especialistas chineses sugerem que a prática diária por 1 minuto, ajuda a prevenir a demência.

Não recomendado para pessoas cujas pernas são fracas e não podem ficar por longos períodos em pé.

Fonte: arquivo recebido da Aliene.