Thursday, October 9, 2014

Granny Smith by day, secret against obesity?

Granny Smith by day, secret against obesity?

Granny Smith green apples famous, would be among the most effective varieties to fight against obesity. According to an American study, the compounds they contain help the formation of a protective intestinal flora against this disease.

Granny Smith seems to have the right properties to help reduce weight gain.  © Lucky Business, Polyvore

Some indigestible compounds present in apples help to develop the intestinal flora which stabilizes the metabolism and creates a feeling of satiety.
These compounds are none other than fiber diet and polyphenols that can survive the process of digestion and assimilation. If you believe an American study on the subject, Granny Smith would record the best results among several varieties of apples .

"We know that in general, apples are a good source of indigestible compounds, but there are differences among varieties , explained Giuliana Noratto in charge of the study published in the journal Food Chemistry .  results this research will help consumers distinguish the varieties of apples that can help fight against the obesity . "

Thursday, August 14, 2014

One weak link in the chain of reasoning

In summary, it is whether these equations Mathematics - meant to describe fluid flow - always have a continuous 3D solution that does not end up becoming pathological adopting physically unrealistic features. This is a problem of mathematical physics whose solution would affect several branches of natural science, weather forecasting in the design of aircraft, for example, and perhaps even with the theory of black holes . Of course, as always in mathematics, it could also have unintended consequences in areas seemingly far removed from the theory of partial differential equations.

The mathematician Mukhtarbay Otelbayev spent 30 years working on the problem of the existence and uniqueness of solutions to the Navier-Stokes equations based on initial conditions.  This mathematical problem has many implications in fluid mechanics.

One weak link in the chain of reasoning

Several mathematicians talents were attacked and not just because the one who finds the solution would be given one of the Millennium Prize of Clay Mathematics Institute and the million dollars that goes with it. In 2006, the mathematician Penny Smith of Lehigh University in Bethlehem, Pennsylvania, thought he had found before Mukhtarbay Otelbaev the solution. She had become disillusioned and withdraw from arxiv article that she posted due to an error in his demonstration. The great mathematician Terence Tao there is also attacked with an innovative approach as he explains on his blog , though without conclusive results yet.

Colleagues of Otelbaev course have undertaken to verify its calculations. The task is difficult in itself and is added to the disadvantage that the Kazakh section of the researcher was written in Russian. Recently, Stephen Montgomery-Smith , a mathematician at the University of Missouri at Columbia who also embarked on the race for the Millennium Prize, sent an email to Mukhtarbay Otelbaev pointing him a problem. The Russian-speaking mathematician had to face the facts by answering: " To my shame, on page 56, the inequality (6.34) is incorrect so the 6.3 proposal is unproven (54 p.). I'm sorry ".

His argument therefore collapses. But the researcher does not abandon. He thinks he should be able to get around the obstacle in the next few months. A similar mishap had reached the British mathematician Andrew Wiles , a professor at Princeton University, best known for demonstrating's last theorem Fermat in 1994, Wiles was on the verge of abandonment after a year of work to correct them as a error in his argument when the path was suddenly opened before him.

Navier-Stokes equations: the problem of the Millennium Prize is not resolved

Navier-Stokes equations: the problem of the Millennium Prize is not resolved

The Millennium Prize of the Institute of Mathematics Clay on the Navier-Stokes Will he escape from the hands of mathematician Mukhtarbay Otelbayev? Kazakh detects an error in its mathematical demonstration but does not disarm either.

Although one can write in a condensed form (the last equation down the blackboard), the Navier-Stokes equations are somewhat complex, involving what is called the tensor ¤âij constraints.  These equations are of great importance for engineers, meteorologists and astrophysicists.  © Olivier Thual

In a previous article, Futura-Sciences leaned in detail resounding statement in January 2014 Mukhtarbay Otelbayev, Kazakh mathematician of the Eurasian National University in Astana, Kazakhstan. This brilliant researcher thought he had solved one of the problems of the Millennium Prize of the Institute of Mathematics Clay: demonstration or refutation, a theorem conjectured long for Navier-Stokes.

The Rose of Jericho belongs to sporophytes

The Rose of Jericho ( Selaginella lepidophylla) belongs to this type, and  the botanists "also called" resurrection plant " . During droughts, it is almost completely empty of its water and can lose up to 97% its mass. She abandons its color green and its cells then come into stasis, a kind of hibernation, maintained until the next rainfall. It can survive for several years.

In case of severe drought, it is detached from its roots and leaves are blowing in the wind in areas where rainfall may be higher. When again immersed in water, the leaves open and green again within hours. It's called the Rose of Jericho, in reference to the biblical town of the same name, again ravaged during the story and always rebuilt.

The Rose of Jericho belongs to sporophytes, it does not produce flowers or seeds but reproduces by spores. If the culture of the plant you are interested, know that you can easily find on the Internet .

The rose of Jericho grows easily on rocks or on a dry, acidic soil. © Sean Steininger

Video: the flower of resurrection is revealed in timelapse

Video: the flower of resurrection is revealed in timelapse

Drought and heat are major threats that face plants during the summer. The Rose of Jericho, also called flower of resurrection and living in the desert of Chihuahua, found a surprising way to remedy the problem.

Desert flora is sometimes surprising. A native of Chihuahua, the rose of Jericho is famous for its ability to survive despite an almost complete absence of water. This property makes it an easy plant to grow. Its main feature is that it folds and unfolds according to rainfall, a grandiose show, which you can enjoy in this timelapse.

Plants have many ways to survive the drought . Some store water in their bodies or sheets, other are covered with hair to reduce evaporation or to reduce the activity of their metabolism . Some plants will allow to dry, giving the impression of death.

A head-up display compatible with the OBD socket of the car

Navdy also will feature a microphone and speaker, allowing the use of its smartphone voice assistant like Google Voice and Apple Siri to dictate text messages , initiate a voice call or invoke a service (navigation assisted listening to music, etc.). Navdy is able to share the screen to manage multiple information simultaneously.  The driver can then make a voice of a hand gesture call while continuing to follow its GPS guidance.  © Navdy

A head-up display compatible with the OBD socket of the car

Yet if the voice interfaces allow drivers to keep their eyes on the road and hands on the wheel, they can be a source of potentially dangerous distraction when used for complex commands. This is also the finding of a study conducted by researchers led by Professor Brian Reimer of the Massachusetts Institute of Technology.

Last summer, Futura-Sciences presented the case head up display  created by Garmin, which projects the guiding GPS on the windshield. Navdy goes further by allowing the user to configure the box so that it displays notifications of their choice and disables others such as SMS, calendar reminders, Twitter , Facebook, WhatsApp, etc. The system is able to handle multiple events to present, for example, a route and share the screen when an incoming call arrives.

The device will also be compatible with taking diagnostic of the car (OBDI-II) for the projection of the speed, tachometer, fuel autonomy or pressure tires . For now, the company designs the applications internally, but plans to open its platform to third-party developers once the product is launched. The housing should be marketed worldwide beginning in 2015, but initially, the interface will be in English only. This is available for pre-order and costs 299 dollars (224 euros). Its price will rise to 499 dollars (373 euros) a month.

Project your smartphone on the windshield with Navdy

Project your smartphone on the windshield with Navdy

The start-up Navdy is preparing to market a high-head display system that interfaces with an Android or iOS smartphone to project all the features and applications on a transparent screen on the windshield of a car. The driver can then control all the voice and gestures.

The head-up display Navdy box connects via Bluetooth with an Android smartphone or iPhone.  It displays all the notifications received by the mobile and allows the driver to control functions through simple gestures and voice.  © Navdy

View their smartphone while driving is not only forbidden, but also very dangerous. However, the temptation to take a look fast on the screen when an alert signals the arrival of an email or a new message on her social network favorite ... Navdy , a start ( start-up ) North American, wants to allow drivers to enjoy the features of their devices without eyes off the road. Also she designed a box that connects wirelessly Bluetooth with smartphone Android or iOS .

This is a head-up display system that installs on the cap of the dashboard. A miniprojecteur disseminates information on a screen transparent 5.1 inch. With a camera infrared , the motorist can control the functions with very simple steps: scanning the index to the left to accept an incoming call even move to the right to refuse, even for the music player.