Arquivo para a ‘Tecnology’ Categoria
Nature and a cure for cancer
25
Nov
The brazilian social debate after a court order requiring the USP to provide a
miracle cure for cancer healing, phosphoethanolamine, the USP contested, now comes the prestigious scientific journal Nature, which defends the position of USP.
The last issue of the magazine brings along with an paper, the reconstitution of the way of the substance, from its preparation and an alleged efficacy, yet inconclusive tests until its unofficial distribution and because the Brazilian court decided to intervene to limit their circulation due to clinical tests are required to be distributed.
The compound, phosphoethanolamine f, has been shown to kill tumour cells only in lab dishes and in mice (A. K. Ferreira et al. Anticancer Res. 32, 95–104; 2012). Drugs that seem promising in lab and animal studies have a notoriously high failure rate in human trials.
Despite this, some chemists at the University of São Paulo’s campus in São Carlos have manufactured the compound for years and distributed it to people with cancer. A few of those patients have claimed remarkable recoveries, perpetuating the compound’s reputation as a miracle cure.
Some of these patients have claimed remarkable recoveries, perpetuating the reputation of the compound as a miracle cure, but scientifically
The three weeks of COP 21
13
Nov
The three weeks of the opening of the Paris conference, already held the Pre-COP,
attended by about 70 countries and chaired by Manuel Pulgar Vidal – Minister of Peru’s environment and president of COP20, the previous conference.
On the agenda were four central themes: the ambition of the agreement, its equity, the concrete actions to be taken before 2020 and the financing to be mobilized after 2020.
The French Minister of Foreign Affairs and International Development, Laurent Fabius, who is the president of cop21, showed the press the main objectives of this preparatory ministerial meeting.
Laurent Fabius said: “” We have had to the pre-COP an important step before Paris, but we are more than ever and mobilize the task that remains is considerable, “summed up in the press conference.
Brazil although the has a bold proposal for contribution in INDC (Intended Nationally Determined Contribution , the acronym in English), which would be 43% (the official website of the event registers 37%) involve illegal deforestation, reforesting 12 million hectares the recovery of 15 million degraded pastures and integration of 5 million hectares of crops, livestock and forests.
But we have in Brazil an extremely dirty matrix (hydroelectric being privatized and expensive nuclear power plants already tried to hang), and goals here are not serious, see the goals of economy and respect for labor achievements
Copyright Street photos
09
Nov
I had a friend with seized smartphone and after
undergoing a humiliation at the police station, thinking that it was sexy photos or something, had his phone confiscated and the girl who found herself offended by his image rights sued.
The subject is intriguing and thought the matter in LibraryCruch site that referred to a public discussion on the subject on the site that made a series of questions related to the copyright of a G + community called Street Focus, including the photographer Jack Reznichi and lawyer Defense Ed Greenberg, who discussed the law SB 79 Arkansas, “the Personal Rights Protection Act,” about how they are treated by police photographers in public spaces.
The two authors of the original article that appeared in Copright Zone, recognize the importance of copyrighting the images, how to deal with model releases, and more!
The authors describe in ThisWeekInPhoto four scenarios:
Scenario 1) – Shooter takes a walk through the zoo, photographing what catches the eye. The wild kids, the tame animals, the monkey house, and the cotton candy.
You can shoot all you can see. But what you can use it for becomes the fodder that photographers argue about endlessly and what lawyers litigate.
Scenario 2) A bride and groom’s first date was at the zoo and they want you to shoot the wedding party there. This is easy. Do not try and go commando. Do not just show up at the zoo and shoot away
It’s an easy phone call to the zoo’s public relations office. You’ll find out exactly what its policy and rules are. You may find out that they love doing photo ops like having twenty people at the zoo doing their wedding photos. There may be a fee or a donation/contribution to the zoo, likely tax deductible, required or suggested. A donation may buy you priceless cooperation beyond your dreams.
Scenario 3) You are a photojournalist with real press credentials. And we mean real and legitimate press credentials, from a real news organization. Not press credentials that came from the back pages of a comic book. You can photograph and use anything in a story that is news worthy or of public interest.
Scenario 4) You have a commercial assignment that needs to be shot at a zoo. Simple. Anything short of a written, comprehensive agreement specifying date, time, location, insurance, etc. signed by the parties will not suffice-period.
Hopefully this information will keep you from messing your shoes in elephant poop.
The electric car batteries evolve
04
Nov
The lithium ions are those that feed many mobile
devices, but use this technology in automobiles has proved difficult, and the current batteries in electric car have little autonomy (80 to 100 km only).
Now researchers at the University of Cambridge are researching a kind of battery called lithium-air or lithium-oxygen, which can provide 10 times more energy, and even sufficient power to compare with gasoline, but it still involves some problems practical.
Now researchers at Cambridge University say they have patented a technology that overcomes some of the main obstacles, according to Clare Grey, project researcher and chemistry professor at the University of Cambridge, now “a significant achievement” of his team already has progress towards high capacity “as we take efficiency to numbers that compete with the current lithium-ion technology.”
With an efficiency of up to 93%, and does so using a different chemical from that used in previous attempts: employing lithium hydroxide (LiOH) in place of lithium peroxide (Li2O2), and also using carbon electrode in the base of the graphene and “additives that alter the chemical reactions at work on the battery, making it more stable and more efficient,” said the researcher.
The result is published in the journal Science.
200 years of George Boole
02
Nov
Born November 2, 1815, Algebra which created was instrumental in
the birth of digital logic (0 and 1, or F=false and V=True), and later at MIT, Vannevar Bush suggested to Claude Shannon who was to become one of the foundations of modern digital computing .
The development of Boole became one of the important mathematical schools, which would influence the philosopher Bertrand Russerl, who wrote; “Pure mathematics was discovered by Boole in his work ‘Laws of Thought’ ‘which was published in 1850.
Although this is a mistake, because the thought does not move for binary laws, Yes and No, as there is perhaps the power and an endless variety of possibilities, Boole later did important work called invariant (or calculus of variations) , which influenced the Theory of Relativity of Albert Einstein.
In 1838, he published a pamphlet called The Mathematical Analysis of Logic, which influenced De Morgan who made a number of simplifications to make the laws of Algebra Boole more simple and easy to be “adopted” in mechanical, electromechanical processes (relays that have emerged more afternoon) and all digital devices that have emerged from these “laws”.
Although it has already died with great respect, it was Whitehead and Russell work Principia Mathematica (1910-1913) who convinced mathematicians that symbolic logic should receive your serious attention.
4K TVs or OLED?
28
Oct
The new TVs that star in the market are OLED (Organic LED – Light Emitting Diode)
and UHD (ultra) 4K (resolution 3840 × 2160 points), which in fact is the advantage of each?
When released the prices were prohibitive in Brazil but already falling approach of Full HD TVs and promise to retire them, perhaps along with the analog to be disabled already from next year.
Experts 4K is a noticeable limit to another human.
The TV 4K is an increment (update) in the technology of digital TVs with the increment of pixels (picture elements), or points on the screen, the miniaturization technology, while the OLED is in fact a new technology does not require ” Rear little lights “because they are LEDs.
With this the OLED screen and the TV thus are thinner, also allow curved screens such as LG, announced in 2014 in this blog site as the first in Brazil.
The “organic” of the OLED is formed by carbon compounds, emitting its own light and therefore are mild and well final.
The OLED may have to 4K resolution and therefore is competitive, and is expected to soon we have already OLED 8K, but the fight is on price, screen OLEDs curve 55 “are between 5000 and 10,000 reais ( or more), the 4K 2,900 reais to 7,000 reais
