Hemeroteca del mes agosto, 2015

The Past and Future of Meaning

Por • 30 ago, 2015 • Category: Opinion

Jaroslav Peregrin For many centuries, a predominant view of meaning was that the meaning of a word is some kind of chunk of mind-stuff («idea») glued to the word and animating it. However, while the traditional view was that we must first understand meaning, which enables us to understand language and hence our linguistic practices, […]

Las críticas de Aristóteles a Platón en Metafísica I,9

Por • 30 ago, 2015 • Category: Crítica

The use of critical exposition of previous doctrines is a methodological procedure usual in Aristotle. But the distinctive characteristic of Book I of the <em>Metaphysics</em> is that, rather than to establish a new doctrine, a review of&nbsp; predecessors serves to confirm the own concepts to be used in the evaluation of the doctrines examined. This imposition of own terms has cost him the charge of distorting historical understanding. With the detailed analysis of the criticisms of Plato’s theory of Ideas in <em>Metaphysics</em> I, 9, we intend to show a) that the criticism of manipulation and distortion of his predecessors’ views overshadow the degree to which Aristotle’s own positions emerge from a critical review of previous thought and b) that the imposition of own terms does not suppose a distortion but a proposal of solution to the problems that previous theories have left unresolved.

Categoricity and infinitary logics

Por • 30 ago, 2015 • Category: Filosofía

We use model-theoretic forcing to show: Theorem Let K be an abstract elementary class categorical in unboundedly many cardinals. Then there exists a cardinal λ such that whenever M,N∈K have size at least λ , M≤N if and only if M⪯L∞,LS(K)+N . This fixes a gap in Shelah’s proof of the following result: Theorem Let K be an abstract elementary class categorical in unboundedly many cardinals. Then the class of λ such that: 1) K is categorical in λ ; 2) K has amalgamation in λ ; and 3) there is a good λ -frame with underlying class Kλ is stationary.

Weighing Coins and Keeping Secrets

Por • 30 ago, 2015 • Category: sociologia

In this expository paper we discuss a relatively new counterfeit coin problem with an unusual goal: maintaining the privacy of, rather than revealing, counterfeit coins in a set of both fake and real coins. We introduce two classes of solutions to this problem — one that respects the privacy of all the coins and one that respects the privacy of only the fake coins — and give several results regarding each. We describe and generalize 6 unique strategies that fall into these two categories. Furthermore, we explain conditions for the existence of a solution, as well as showing proof of a solution’s optimality in select cases. In order to quantify exactly how much information is revealed by a given solution, we also define the revealing factor and revealing coefficient; these two values additionally act as a means of comparing the relative effectiveness of different solutions. Most importantly, by introducing an array of new concepts, we lay the foundation for future analysis of this very interesting problem, as well as many other problems related to privacy and the transfer of information.

The (in)visible hand in the Libor market: an Information Theory approach

Por • 30 ago, 2015 • Category: Economía

This paper analyzes several interest rates time series from the United Kingdom during the period 1999 to 2014. The analysis is carried out using a pioneering statistical tool in the financial literature: the complexity-entropy causality plane. This representation is able to classify different stochastic and chaotic regimes in time series. We use sliding temporal windows to assess changes in the intrinsic stochastic dynamics of the time series. Anomalous behavior in the Libor is detected, especially around the time of the last financial crisis, that could be consistent with data manipulation.

Washington hawks hype up Beijing parade

Por • 28 ago, 2015 • Category: sociologia

China’s upcoming parade for the 70th anniversary of the end of WWII has raised quite a few controversies in the Western hemisphere. Lively debates focus on how many global leaders will show up at the commemorative event, a sign believed to measure China’s political leverage, and how many new weapons will make their debut in the parade, which is a standard way to interpret China’s military prowess. The National Interest said on Monday that the missile technology China is about to display aims to «sink the US Navy.» Meanwhile, former director of the US Missile Defense Agency Trey Obering warned that China is playing catch-up and has shaken the three major foundations on which US military superiority relies, which are «superior strategic intelligence, surveillance and reconnaissance capabilities; the ability to project power globally; and an overwhelming dominant technological advantage across a spectrum of conflict.»

Assessing North Korea’s ‘Ground Game’ with China

Por • 28 ago, 2015 • Category: Internacionales

A recent Global Times editorial, from August 24, captures China’s displeasure with North Korea’s behavior in the loudspeaker crisis, and the Kim regime’s deaf ear to Beijing’s needs. In fact, the Chinese version of the editorial was far more severe in its criticism, taking on an overtly frustrated and threatening tone toward North Korea. Author Mao Kaiyun’s August 23 editorial in another CCP newspaper, Youth Daily, voiced a similar set of concerns, saying that even “if North Korea doesn’t pay heed to China, China still needs to undertake its responsibility as a great power … being adjacent to the Korean peninsula, China certainly cannot permit any country to unleash trouble on its doorstep.”

The Political Economy of Technoscience: An Emerging Research Agenda

Por • 28 ago, 2015 • Category: Educacion

This short essay presents the case for a renewed research agenda in STS focused on the political economy of technoscience. This research agenda is based on the claim that STS needs to take account of contemporary economic and financial processes and how they shape and are shaped by technoscience. This necessitates understanding how these processes might impact on science, technology and innovation, rather than turning an STS gaze on the economy.

Physics and Philosophy

Por • 28 ago, 2015 • Category: Leyes

Although a great deal has recently been written about the bizarre conceptual foundations of quantum mechanics, special importance must be attached to these deliberations of one of the principal architects of the theory. Right up to his death in 1976 Heisenberg retained a deep interest in the nature of the quantum universe and the profound philosophical implications that flow from it. The exposition that follows is a sweeping survey of these ideas, together with an appraisal. True revolutions in science involve more than spectacular discoveries and rapid advances in understanding. They also change the concepts on which the subject is based. Such afundamental transformation took place in physics during the first thirty years of this century, culminating in what has been called the Golden Age of Physics. As a result the physicist’s world view has been radically and irreversibly altered.

Arreaza anuncia nuevas acciones en la frontera: «Esto no es guachafita»

Por • 28 ago, 2015 • Category: Nacionales

ÚN.- 28/08/2015. «Vienen nuevas decisiones, nuevas acciones en la frontera», destacó el vicepresidente de la República, Jorge Arreaza, en la marcha que se realiza en Caracas por la paz y contra el paramilitarismo. De igual manera aseguró, «esto no es una guachafita, vamos a construir una frontera de paz, justicia y ley (…) el Gobierno venezolano […]