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Arquivo para a ‘Computer – Hardware’ Categoria

Make holograms real, fast and accurate

20 Jun

We have already mentioned the development of holograms in space without the need for devices that recreate the artifacts, now it is possible to do them in an ultra-fast and very precise way. Scientists at the Lawrence Livermore American Laboratory in California have developed a technique that can create complex objects in seconds, we can say using Shannon’s sampling theorem for imaging, now being three-dimensional.

This technique creates the objects in layers simultaneously, the details were published in the journal Science Advances in December 2017, there are two really important innovations there, the possibility of creating real images in ultra-fast mode using a photosensitive resin recreating 3D printing with a powerful laser which hardens this resin making it a plastic.

This can also be done with metals using electron beam and a metal powder instead of the resin, so does not need the numerous supports required for 3D printers. LLNL engineer Maxim Shusteff, who leads the study, told New Atlas: “The fact that you can make totally 3D parts, everything in one step really overcomes a problem in additive manufacturing”, now holograms can return to material parts.

Another option would be live tissue bio-printing: “We made a good first attempt,” Shusteff said, “but we have not yet taken it to the limit of its performance, so the space is open to us and others to demonstrate what this approach is able to do. “living tissue bioprinting. “We made a good first try,” said Shusteff,

If 3D printing was already heralded as a revolution, this new technique promises to further accelerate this process

 

The first quantum computer hub

30 May

The North Carolina State Unit was chosen by IBM to have the first Quantum Computing Hub (Q Hub that became part of IBM’s Network Q), as well as the first networks linking some universities.
On December 5, 1969, ARPANET joined the Research Agency of the US Department of Defense, the University of California, Los Angeles (UCLA), the Stanford Research Institute (SRI) at Menlo Park, the University of California, Santa Barbara (UCSB) and the University of Utah (photo).
Students, faculty and researchers will be able to access IBM’s 20-bit supercomputer to solve classic computing problems that would take a long time to process, now they will be done in a few minutes depending on the problem.
Bob Sutor of IBM Research said “we can not create a computer with 10% of the Earth’s atoms, but even so, with the quantum computer we can represent exactly this information”, according to a post on Techinician Online.
IBM’s plan is more audacious, with Fortune 500 companies and universities working to solve larger problems more quickly through the Q Network, while NC State will be collaborating with local organizations to solve complex equations.
NC State faculty are developing both undergraduate and graduate courses to use quantum computing to build their knowledge in anticipation of the hub’s operational debut this fall (in September).

 

Networks and global crises

22 May

Social networks are provoking an organic change in society as a whole, it is already more evident than it was ten years ago, but networking is still confused with decentralization and there are strong conservative forces calling for a new social “hierarchy”.

The perception that this or that country is a country in “crisis” more acute than others is valid, but the truth is that it is those who learn the most from the crisis that can get out of it faster, the first lesson is that there is a society more attentive, more diversified and less able to support centralized and authoritarian schemes, but why then this wave?
Precisely because the vast majority of the “silent” now reveal the true face, that of convenience and coexistence with values ​​that were only “supported” by those who suffered some form of exclusion, and I do not speak only financially, even if it is serious.
Edgar Morin points out that now the public space “gathers society in its diversity. The right, the left, the crazy people, the dreamers, the realists, the activists, the piadistas, the rebels – everyone. Abnormal would be legions in order, organized by a single flag and led by party bureaucrats. It is creative chaos, not the pre-established order. ”
All this can go back in a civil war, I agree with Manuel Castells: “civil war and social movements are incompatible!”, But social movements are now not only the masses maneuvered by unions and parties, this is what the caudillos fear, there is much distrust and according to Castells “parties are universally despised by most people,” because we know that we pay his salary (high) and do not do what they should do.
But it is necessary to save social values ​​so as not to fall into the temptation of violence and authoritarianism that is what the radicals and their masses want, Castells says “you need a lot more courage not to be violent. Being violent is easy. ”
I am in Portugal that experienced a deep crisis and still feel reflexes of it, but they learned to live together, to talk and to have a little more patience with serious social problems, but this weekend there was a mega manifestation of teachers who had salaries affected and retirement (reform here) delayed, some may be entitled only at 70´s years old.

 

Androids has dreams?

18 May

The two films of Blade Runner were inspired by the book Androids dream of electric sheep ? by Philip K Dick is reissued in 50-year commemorative edition (1968-2018) with unpublished writings: a letter from the author to the producers of Blade Runner in which prophesies the success of the production and the last interview granted by Dick, published in 1982 in the journal The Twilight Zone Magazine at the time of the launching of the film.
The exclusive preface signed by Argentine writer and journalist Rodrigo Frésan, a lover of science fiction and Dick’s work chronicling the troubled and impressive life of the author, and a brilliant scenarios they call “post-apocalyptic” by Douglas Kellner and Steven Best, professors respectively from the University of California and the University of Texas.
Add to this a postface written by the translator of the book, Ronaldo Bressane, who compares Androides with Blade Runner and comments on aspects of the work not explored in the cinema, such as environmental concern, besides the religious and metaphysical questions present in the text.
Religious and metaphysical issues are so current that they deserve an up-to-date view of what we think is our inner universe, our values and our relationship to the natural and yet transcendental world, in the non-immediate sense.
What is nature beyond nature and what is man beyond human is neither trans-nature nor trans-human only, but to look at it properly it will be necessary to have a transdisciplinary look, not to see from the side apocalyptic and pessimistic only.
Artificial Intelligence is undoubtedly an inspiration for the next few years, thinking of it is not thinking outside the spirit and human interiority, but it’s just questioning what it is, Blade Runner 2049 did this, but success was small, we preferred Robocop.
If inner life was reduced in modernity it is not due to current and upcoming advances, but due to the fact that sometimes we attribute to humans robots attitudes and not the opposite, because the current robots still have mechanical reasoning and a limited logic.

 

Agent environments and an example

17 May

The example that Norvig and Russel (2010) will give to describe what an environment in Artificial Intelligence is happy and unhappy at the same time, happy because it has become something real 8 years after the edition of the book, a taxi as a stand-alone vehicle, and unfortunate because there are already cases of accidents with autonomous vehicles.

What is called environment is described as PEAS (Performance, Environment, Actuators and Sensors) (figure on the side), whose first stage is to design the task environment.

The agent will be different from a software (a softbot or webcrawler), but it is didactic.

The suggested environment was a stand-alone taxi, which at the time was “little beyond the capabilities of existing technology,” but on page 28 will describe a robot with this function, the fortuitous side of the example as the authors say is a ” completely open” and “there is no limit to the new combinations of circumstance that may arise”. (Norvig, Russel, 2010: 40)

What performance measures will be desired: arrive at the correct destination, minimize the correct destination time, fuel consumption and wear, traffic violations, disturbances and safety to passengers and other drivers, and if there are conflicts make decisions (this is one of the reasons for the accident to protect the passengers caused a hit by a passer-by).

The next step is to map an autonomous car environment, it must deal with a variety of roads, from rural lanes and urban lanes to 3, 4 and up to 5 lanes, with lanes, other vehicles, road works, police cars, puddles, and potholes, and should interact with potential and actual passengers.

Actuators for an automated taxi include those available to a human driver: control over the engine through the throttle and control over steering and braking. some optional choices of communication with other vehicles with arrows and even horn, and with passengers who will need voice synthesizers.

The basic taxi sensors will include one or more controllable video cameras so they can see the road; you can increase them with infrared or sonar sensors to detect distances to other cars and obstacles.

The problems of safety and conviviality with human drivers is evident, but thanks to this example of success made in 2010, today we have maps, GPS, road signs, and many others advances.

NORVIG,  P.; RUSSEL, P. (2010) Artificial Intelligence: A Modern Approach 3nd ed., Upper Saddle River, New Jersey: Prentice Hall.

 

The singularity and the tecnoprofetas

09 May

Before Jean-Gabriel Ganascia talked about the Myth of Singularity, the idea that machines would surpass man in human capacity, had already been analyzed by Hans Moracev in his work: Men and Robots – the future of human interfaces and robotics, careful and ethical Ganascia did not fail to quote him.

There are groups that study the ethical issues that this involves as the Center for the study of existential risk at Cambridge University, but also groups engaged in this project with University of Singularity, with weight sponsors such as Google, Cisco, Nokia, Autodesk and many others, but there are also ethical studies such as the Institute for Ethics and Emerging Technologies that Ganascia participates in, and the Institute of Extropia.

In the account of technoprofetas, the word was coined by Ganascia, a genius prejudice Kurzweil is one of the most extravagant, injected drugs in the body preparing to receive the “computational mind”, but with prediction for 2024 already spoke and now it is for 2045 to 2049 , something that is incredible for someone who is said to have no beliefs, for this fact is very distant if it occurs.

Ganascia thinks this is a false prophecy and Moracev analyzes the difficult real possibilities.

The Gartner institute that works on forecasting predicts neural computing still crawling with predictions for 20 years from now, interfaces like Amazon’s Alexa and Hanson’s Sophia, are human interaction machines that learn things from everyday language but are far from the so-called machines of a general artificial intelligence, because human reasoning is not a set of propositional calculations as they think.

One can argue more this is because people are illogical, but this according to what logic, what we know is that men are not machines and what we ask if machines are men, is the essential question that inspired the series Blade Runner, the book of Philip K. Dick “Do androids skeep dream of electric sheep” from 1968, which inspired Blade Runner.

I think dreams, imagination and virtuality are faces of the human soul, robots have no soul.

 

World created beyond the imaginary

08 May

The story of Claude Shannon, who worked in a MIT laboratory of Vannevar Bush and Alain Turing crosses through World War II, while working on secret projects, which were two sides of the same coin, unaware of one another’s project, the idea of ​​passing the language to a human code, the System X that worked Shannon, and the one of Turing that was to decipher the code of the Machine Enigma capture of the German army.

Not being able to talk about his projects, speaking at lunches and gatherings in Gödel’s Incomplete Theorem, and the idea of ​​creating a machine that could encode human thought, he said in a joke, “could be a mundane brain like that of the president of Bell Laboratories”, place of secret projects in development.

Bell Labs began as an AT & departament in Washington and later of independent labo of the project’s development (photo above).

The major obstacles to innovation initiatives stem from the mental blocks caused by unproven beliefs, prejudices and perceptions about the possibilities of technology, which are not only strongly alienating, but are inhibitors of creativity and can condemn processes of poor mental development. In spite of the irony of Shannon and Turing with the president of Bell Laboratories, there developed from the first valves, the first transistor that was awarded a Nobel Prize, the telephone systems in their most diverse versions arriving the dialed line and the use of the network for transmission over the internet, and the optimal fiber system, whose first test was done in Georgia.

Also lines of radio and television handsets, the development of the Linux precursor UNIX system, the first solar cells, several Nobel prizes and famous students passed by.

The challenge of pioneers is never simple, critics are always willing to devalue the human effort of progress, Bell Laboratories and other study centers, such as CERN and Research Institute around the world, Brazil has some of them as INPE in São José dos Campos, are central drivers of human creativity and project the future of man.

 

 

 

History of the algorithm

07 May

The idea that we can solve problems by proposing a finite number of interactions between several tasks (or commands as they are called in computing languages) for several problems originates in Arithmetic.

Although the machine of Charles Babbage (1791-1871) and George Boole’s (1815-1864) Algebra make a huge contribution to modern computers, most logicians and historians of the birth of the digital world agree that the problem of fact was raised by David Hilbert’s second problem (1962-1943) at a 1900 conference in Paris.

Among 23 problems for mathematics to solve, some recently solved such as Goldbach’s Conjecture (see our post), and others to solve, the second problem was to prove that arithmetic is consistent, free from any internal contradiction.  

In the 1930s, two mathematical logicians, Kurt Gödel (1906-75) and Gerhard Gentzen (1909-1945) proved two results that called new attention to the problem proposed, both referring to Hilbert, so in fact, there is the origin of the question, roughly, if an enumerable problem is solved by a finite set of steps.

In fact, Gentzen’s solution was a proof of the consistency of Peano’s axioms, published in 1936, showing that the proof of consistency can be obtained in a system weaker than the Zermelo-Fraenkel theory, used axioms of primitive recursive arithmetic , and is therefore not general proof.

The proof of the inconsistency of arithmetic, called Gödel’s second incompleteness theorem, is more complete and shows that some proof of the consistency of Peano’s axioms can be developed without this arithmetic itself.

This theorem states: if the only acceptable proof procedures are those that can be formalized within arithmetic, then Hilbert’s problem can not be solved, in other more direct form, if the system is complete or consistent.

There are polemics raised about these results, such as Kreisel (1976) who argued that the proofs were syntactic for semantic problems, Detlefsen (1990) who says that the theorem does not prohibit the existence of a proof of consistency, and Dawson (2006) that the proof of consistency is erroneous using the evidence given by Gentzen and Gödel himself in 1958 work.

The controversies aside, Kurt Gödel’s participation in the important Vienna circle in the 1920´s before the war exploded, and the subsequent discussions of his theorem by Alain Turing (1912-1954) and Claude Shannon (1916-2001) underline its importance for the history of algorithms and modern digital computer.

 

A way forward in education

19 Apr

The basic basic education as stated in the first post of empathy, the ability to resolve conflicts and it will not be possible with online education reach the levels of schooling for the lower age groups, but from the first schooling.

I call this age up to 10 or 12 years, it is possible to observe that online education helps and can be of great advancement, especially for children living in peripheral countries have a school performance capacity above what would be appropriate for their age, of course this child should enjoy normal channels of empathy and sociability of his age.
But at the higher level we can have higher quality jumps and provide high schooling on a world scale, just to give an example, India that still has alarming levels of health and poverty is a country that generates brains and high school students.

Massive Open Online Curses (MOOCs) is a type of open course offered through virtual learning environments, Web 2.0 tools or social networks that aim to offer a large number of students the opportunity to attend without physical presence in universities and without costs of housing, transport, etc.

A fake News ran this universe saying that the MOOCs were born in 2012 and died in 2014, but this is not true, the numbers prove this: the current numbers according to the Central-Class site, the number of online students is 58 million distributed in more than 700 universities, in 6850 courses, also the graphics of this site show increasing values.

In Brazil, large universities already have online courses, for example: FEA, from USP, has a course on Fundamentals of Administration (FEA / USP), available on the Veduca online education platform in Brazil. who wants to learn how to manage, another course is Social Responsibility and Sustainability of Organizations (PUC / RS), a PUC course in Rio Grande do Sul available in Miríada X, the Physics of São Carlos has The Basic Physics course (IFSC / USP) the course has a workload of 59 hours divided into 26 classes and UNB has the Bioenergetics course (UNB), which allows the interested party to choose to attend classes or obtain the certificate.

 

The (in) visible relations and networks

09 Apr

One of the issues in focus today is social networks, they are not of today, the problem is that today they are in evidence, but they continue to keep certain aspects of invisibility, confused with virtuality, make a historical analysis.

The networks of commerce in antiquity, by sea and by land, the invisible colleges, defined by Solla Price in her work “The development of science: historical, philosophical, sociological and economic analysis” of 1976 (in Brazilian edition), calls the scientific networks of collaborative networks, where researchers communicate, exchange information and experiences, means that even in the absence, through printed works and conferences, authors collaborate.

Essentially, a network is a web of nodes and links between nodes, although these participants are autonomous, the consequences of network connections can exceed their own limits by connecting to “out” through weak links. In the analysis of networks can be identified only for didactic reasons, three types: ego networking, global networking networks and networks of actors relationships, called TAN (Theory Actor-Network) with origin in the works of Michel Callon.

Airport networks, container transport networks around the world, Global networks are strongly influenced by the media, and they create a certain amount of invisibility, since the collaborative networks of publications are also called invisible colleges by authors like Solla Price, but accelerated by the speed of the media, electronic media is larger speed of publication and communication that prints it, then blog, twitter and the social media media like Facebook occupy a new role at the present time, but are not in themselves networks, but networks media.

Several measures can be thought of, the centrality of closeness of an actor measures how close a node is to all others, the greater the proximity measure, the intermediation betweenness measures the importance of a node in the circulation of information. So, for information effect, betweenness is the measure of control that an actor holds in the flow of information and closeness is the facility that an actor has of access to information.

The invisibility, emphasizing present in the “invisible” colleges in modernity, is relative to the process of communication and information that can go beyond the actor actors along the network, virtuality in turn refers to the potentiality of increasing the capacity of the network