Arquivo para a ‘[:pt]Dispositivos[:en]Devices[:es]Dispositivos[:]’ Categoria

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


They aren´t deaf but not listen

04 Apr

The physiological fact of listening can be in contrast with the apprehension of the content in the human brain, that is, one can have a suitable hearing aid or even artifacts that help, but even listening, do not listen, that is, they do not apprehend the content.
McLuhan’s view that communication as a medium tends to be defined as transparent, innocuous, unable to determine what are the communicative contents that are conveyed.
Its only effect on the artifact, whatever it was, in the communication process would be negative, due to noises or obstacles in the delivery of the message, this was already the preoccupation as a device of Claude Shannon, but now McLuhan calls either the message made orally or in writing, be it transmitted by radio, television, puts in play new structures being artifacts intended to broaden the senses highlighting contours and other nuances of what is communicated, in this work relates to the artist who wishes to highlight something.
Put more directly, for McLuhan, the medium, the cane (terms more appropriate for Shannon), the technology artifacts that communication establishes, is not only a form of communication, but will ultimately determine the own content.
What McLuhan points out is the fact that a message delivered both orally as in writing, when broadcasting on the radio or television sets the content.
Their central thesis is that there is a double operation: 1) to study the evolution of the communal media used by men throughout their history, and 2) to identify the specific characteristics of each of these different media / communication artifacts .
These are two central points of his investigation that are at the root of one of his fundamental works, namely Understanding Media, of 1964.
Thus develops three galaxies, when only one is remembered, the Gutenberg Galaxy, which is typical of the written culture and then printed with the possibilities of reproducibility, but there is the oral or acoustic cultural that is previous, where the question of listening is fundamental (orally speaking), oracles and prophets occupy a central role, and the present one that McLuhan called electronic, but it is possible as an extension to speak of a digital galaxy in network, where there are media of networks that do not must be confused with the networks, since they exist in the previous galaxies.
So those who are trapped in the Gutenberg galaxy do not listen to oral culture, and those who are trapped in the culture of pure technology do not listen to oral and written culture


Codified: For a Design Philosophy

22 Mar

Vilém Flusser was a Czech, brazilian citizen naturalized, died in 1991, who worked for about 20 years as professor of philosophy, journalist, lecturer and writer in Brazil and then back in his country of birth to the Czech Republic.
His books are being republished in Brazil, including all his writings, and I began rereading The Coded World – for a philosophy of Design.
His work goes beyond the influences he received from Roland Barthes, Marshall McLuhan, because his philosophy is itself with elements of phenomenology and existentialism.
Rafael Cardoso’s introduction to the book highlights his change of thinking about the modern media he just saw born: “unlike most modern philosophers, who tend to focus their analysis on verbal language or mathematical codes, Flusser part of its gigantic power of reflection to images and artifacts, laying the foundation for a legitimate philosophy of design and communication. “(Flusser, 2017, p.10)
He asked deep questions about the virtual world: “If a tree falls into virtual space, and there is no one online, does it generate a warning message?” Returning to the famous question of the tree falling in the forest, the difference between the material and the immaterial? Can we exchange things for not things? “(Ibid.) And concludes with an even more fundamental question:” What destination should we reserve for the detritus generated by our frantic activity of transforming nature into culture? “(FLUSSER, 2017)
It approaches the paradigm of information, an essential basis for knowledge and education, “the end of history seems to be the end of our collective ability to fight against entropy, against the breakdown of meaning and form. If the basis of what we understand by culture resides in the action of in + form, then is not it paradoxical that the excess of information leads us to the breakdown of meaning? “(Idem)
The importance of the “concept of virtuality is perhaps the best and most elegant proof of how well Flusser was right.” (Ibid.), And can no longer escape this question, use in various forms of information, communication and the arts requires opening of this “black box”, the name of an essay published in the year 1985.
Flusser, unlike apocalyptics, admits that “at least in thesis,” which should become human well-being, becomes a slave to the forces of another “nature” which it helped to artificially generate. ”
Aspects of virtuality and a codified world are uniquely developed by the author and contribute to a more serene debate on new media.

FLUSSER, V. (2013) Shape of Things: A philosophy of Design, Reaktion Books, 2013. (pages and year em Brazilian edition).


Princess Leia: Back to the Future

03 Feb

I know, it’s two distinct films, but Brigham Young University (BYU) seems to return to theaPrincesaLeia path of broadcasting and projecting 3D holographic images into the air.
“Our team’s mission is to make the 3D holograms of science fiction a reality,” said Daniel Smalley, a professor of computational engineering and computer science, a holography expert who recently published an article in Nature magazine.
The technique he developed is based on the phenomenon of photophoresis, in which particles suspended in the medium of a gaseous liquid (there are experiments with droplets of water that forces it to be sucked into the air), it can be the particles that are in the air, which need to be moved by thermal gradients and can be done by laser beams, explains Smalley, “these screens are capable of producing images in a ‘fine beam’ that are visible from any direction and are not subject to cutouts,” ie seen from any position of the viewer.
The technical name of this effect is more precisely: “photophoretic-trap volumetric display”, and is superior to old techniques that could not capture light through the air to create a virtual object with the same notion of depth as the actual object.
But the most spectacular is the possibility of RGB projection (Red-Green-Blue, the three primary colors that composed were the visible spectrum by the human being) as the point of light is able to move quickly and thus the point of light produces the color, the projection of the green, red and blue laser radios produce the visual effect of the color.
The color image in three-dimensional volumetric (3D), will have the resolution of 10-micrometer (10 ^ -6 of the meter or 10 ^ -4 of the centimeter), this means to produce 10 thousand voxels (Pixels volumétricos) by centimeter or one million by meter cubic.
In a short time the communication has changed, in 10 years we have spoken through the Web in visual interaction, thanks to VoIP (voice over Internet), now the volumetric interaction in holograms, or also, to watch images of objects and people around us that are thousands of miles of distances, or simply in filming from other times, we are back in the future.


Heidegger and the Glade

08 Jan

The term is recurrent in philosophy, Plato spoke of leaving the cave to the light,aClareira in modernity appeared the Enlightenment, and more recently Heidegger spoke of the clearing (or Glade), meaning an opening in the middle of the forest, therefore, the question of the lack of light and dark night it is not new.
But by studying the etymology of the Clearing, removing it from Heidegger’s philosophy, it comes from the German word Lichtung, where in addition to the meaning of a clearing in the forest (he himself lived a few years in the black forest of Germany), while Licht is the word for light , will mean hidden things, or entities whose truth must come to the surface, so some translators use unveiling.
The clearing is in this context what is hidden within a whole, where the being must emerge, and this seems more appropriate to modernity, since the fragmentation where only the part emerges is most often opposed to the whole to which the being belongs, thus the question of Being.
Thus the truth, for the present day, exists in the opening of the part to the whole, and the total closure of the part to the whole is sensed, not only as context, but as an integral part of Being, and to which openness is necessary to arrive the truth, not the affirmation concerning the object, but the primordial notion of the truth which is the discovery of the being in itself.
The entity that is discovered, stated Heidegger himself: “let it be seen in his being and being discovered. The truth-being (truth) of the statement must be understood in the sense of being a discoverer “(Heidegger, 1986, 219).
First we see this ontological truth as Being, and no longer as logic, as we see this relation between knowing the object and the relation to Being itself, which in modern philosophy could be called subjectivity, but it is not because they are not separate instances.
What is theorized here, in accordance with the anthropophysical theory in extension to sociotechnical, is that instead of treating the difference between thinking man as being that has “objects” in the sense of being possessed as the capacity to speak, and to construct “external” objects, the ontological conception that man thinks of as “being” through objects (the language and the production of his own life and the means necessary for it) allows us to understand all means not only as a vehicle for transmission of information, but as the mode in which human existence itself manifests itself, we call it onto-anthropothecnical.
In the photo, Andrew Kessel’s article for the magazine SingularityHub, experiments on real-life re-creation of computers by computers in 3D printers.

HEIDEGGER, M. Sein und Zeit. 17 ed. Tübingen, Niemeyer, 1986


Technology and bad news in 2017

27 Dec

The brazilian Minister of Technologies Gilberto Kassab announced inGoProFusion January this year that broadband would have limited data, and mobilization of users and even Anatel was immediate, also this month the good old Nokia (now global HMD) announced its membership in the Android system, which is becoming more universal.
In January South Korean Samsung admitted the problems of explosions with Galaxy Note 7.
February was marked by a series of smartphones, such as the revived design of the Nokia 3310, without the same immediate success of the first generation the Pokemon Go hit the market.
In March Nintendo released the console Switch, the ZenFone 3 Zoom is released in Brazil, as well as the Galaxys S8 and S8+.
April was the month of the alert, the play of bad taste Blue Whale began to proliferate, there was also the case of the boy from Acre who left encrypted messages and disappeared.
May was the month of the ransomware virus WannaCry, which affected Telefonica Compay and FedEx, in 3 days the virus was neutralized, but the collection of bitcoins for captured files yielded a million probably the author has not yet been identified.
In June variations of the WannaCry affected possibly the origin has been in Russia.
In July, the virtual mural application Sarahah appears, the app is controversial because different from the spinners (virtual ads), allows the anonymity that can be source of blows.
In August Andy Rubin, considered the father of Android, launches the concept of Essential Phone, but like most Big Thing projects in the digital world, still lacks evolutions.
September was the same as the iPhone 8 and 8 Plus, as well as a commemorative edition of the iPhone X version ten years ago, but the Chinese Xiomi with Mi Mix 2 and ZenFone 4 appeared on the market.
September was the same as the iPhone 8 and 8 Plus, as well as a commemorative edition of the iPhone X version ten years ago, but the Chinese Xiomi with Mi Mix 2 and ZenFone 4 appeared on the market.
A new attempt at a revolutionary model was the GoPro Fusion (Picture), with a 360 degree camera.
October Google launches Pixel 2 and Pixel 2XL after the purchase of the HTC division.
November launched them to begin to rarify, but Razer launched the Razer Phone, and Tesla launched the semi-automatic and electric truck, but still subject to evolutions.
December brings the worst news, Trump’s idea of taking away the neutrality of the internet (companies would have more “band”) begins to thrive, would the end and total commodification be? we hope not, while technology fear is advanced, monopolies make the party.


The future of thinking machines

05 Oct

We made a point of making the classifications (post) between cyborgues, aRayKuzweilandroids and humanoids, showing that the hybrids are still a fiction for some and a delirium for others, as our view is the point of singularity of Raymond Kurzweil.
Points of singularity m (it is good to say technological, since there are others) would be that point where there would be a surpassing of biological human to a post-human technological, of silicon or even something more futuristic, photonic or neo-biological (biological chips, for example ).
Raymond Kurzweil’s definitions are clearer and more precise, he wrote in 1987 The Age of Intelligent Machines and then in an even greater delirium an update to The Age of Spiritual Machines where he seeks to find where the so-called Transcedent Man (documentary 2009), and then we can outline his ideas.
You can delineate your ideas in 4 points: technological evolution up to its definition of singularity is one of the tangible objectives of humanity (will be?) By exponential progression, the functionality of the human brain is quantifiable in terms of technology and can be built in a near future (but only functional); average advances can keep a significant amount of their generation alive enough for the increase in technology to pass human brain processing (one thing does not imply the other, could be done with future generations), and a point that is socially interesting that the theory of accelerated evolutions.
This theory says that the theory of accelerated change refers to the increase in the rate of technological innovation (and sometimes it may be accompanied by social and cultural evolution) and is always present in history, which may suggest faster and deeper change in future, although this is true how much accelerated depends on the historical perspective.
We define this evolution as the noosphere, a sphere of mind or spirit, based on the idea of John Searle, that the mental “real and ontologically irreducible” to the physical, and that technologies evolve and accelerate human growth but are separated by what Juergen Schmidhuber calls “uniqueness of the omega”, something at once similar and different from the omega of Gregory Chaitin, because it is not a number or a number, but what Teilhar Chadin (1916) defines in his noosphere as the beginning and end of the human , but wrapped in a connection of minds and spirits as if they were communicating vessels.
For Juergen Schmidhuber, the next Omega – 2040 (there was no film Blade Runner 2049) from his series Omega – 2 ^n human lives (n <10; human lives (n <10; a life – 80 years) about major stages of events would occur in human history.
He questioned the validity of such changes by suggesting that they merely reflect a general rule for “both the individual memory of the single human being and the collective memory of whole societies and their history books: constant amounts of memory space allocated to get exponentially greater, adjacent time slots more and more into the past, “and it is memory and not Moore’s law that speaks of the growth of digital memories.
His suggestion is that “the reason why there has never been a shortage of prophets predicting that the end is near – important events according to their own vision of the past always seem to accelerate exponentially,” so both ancient and modern prophecies are no longer that oracles that establish this reconnection between the “omega” of the beginning and end, announcing great changes and at the same time connected to them.
There is a very clear example of Jürgen Schmidhuber’s acceleration, given in Wurman’s book, “Information Anxiety” (1991), where he says that a person who read the New York Times for a year read more than the best of the men of the eighteenth and earlier centuries, then of course there is more reading today than in previous centuries, but thinking … need evolution.


Autonomous robots?

03 Oct

Autonomous robots are a denomination for those who are within the environmentalautonomousRobot limits, can achieve the desired goals (by humans or by tasks organized in an algorithm) in these unstructured environments without a human help, by this they are in certain levels.
For example, within a factory where mechanical tasks are performed, to avoid accidents, their geographic space is limited and deficient to detect the defect that can be fulfilled by a forged task, since a space robot should have fewer limits and be the most autonomous autonomous, for being without possibility of direct human action and having communication difficulties due to a distance.
The project called SWARM, funded by the European Union and we have already made a post, now has the first multi-robot system of autonomous assembly that has sensory-motor coordination observing similar robots around them, they will vary in shape and height in white according to a task and / or work environment.
A central “cerebral” central coordinating system, all of us, through a system called MNS (Mergeable Nervous System), and thus are reconfigured observing different capacities but combined by a single central controller.
They can also split up and perform self-repair tasks, eliminating defective body parts, including a brain unit with some defect, of course, one can define which are defeats and self-repairs.
In autonomous robots, learning and strategy according to the environment, what you can do with your autonomy increases, but for what you can print, the article is still not the case.
The current model has 10 units, and the authors point out without paper published in Nature Communications, claim that the Project is scalable, both in terms of computational resources for robotic control and time of reaction to stimulus, whithin the system.