Hemeroteca del mes agosto, 2014

US slouches toward Syria, again (I). A war by some other name

Por • 28 ago, 2014 • Category: Internacionales

The US’ regional allies were in a de facto alliance with the extremist groups affiliated with the ISIL in a master plan with the principal objective of forcing ‘regime change’ in Syria. There is deep irony here that Qatar used its good offices just this week to engineer the release of an American freelance journalist who was being held by a jihadist group in Syria. Quite obviously the nexus between the Syrian jihadists groups and the Gulf Arab petrodollar states such as Qatar is very much continuing. And now, despite all that, to associate and co-opt these very same ‘ regional allies’ today in the upcoming Syria project as key partners raises suspicions about the real American intentions.



Two new kinds of numbers and their arithmetic properties

Por • 27 ago, 2014 • Category: Opinion

We introduce two new kinds of numbers given by
R n =∑ k=0 n (n k )(n+k k )1 2k−1 (n=0,1,2,…)
and
S n =∑ k=0 n (n k ) 2 (2k k )(2k+1) (n=0,1,2,…).
We find that such numbers have many interesting arithmetic properties. For example, if p≡1(mod4) is a prime with p=x 2 +y 2 (where x≡1(mod4) and y≡0(mod2) ), then
R (p−1)/2 ≡p−(−1) (p−1)/4 2x(modp 2 ).
Also,
1 n 2 ∑ k=0 n−1 S k ∈Z and 1 n ∑ k=0 n−1 S k (x)∈Z[x]for all n=1,2,3,…,
where S k (x)=∑ k j=0 (k j ) 2 (2j j )(2j+1)x j . We also pose several conjectures for further research.



Entendiendo la cuestión de Ucrania en quince minutos

Por • 27 ago, 2014 • Category: Política

El mundo actual está pasando por una superposición de toda una serie de crisis cíclicas. La más grave de ellas es una crisis tecnológica que va asociada con cambios en las longitudes de onda del desarrollo económico. Estamos viviendo un período en el que está cambiando la estructura de la economía. La estructura económica que ha estado impulsando el crecimiento en los últimos treinta años está agotada. Tenemos que hacer una transición a un nuevo sistema de tecnologías. Este tipo de transiciones, por desgracia, siempre ha pasado por una guerra. Así ocurrió en la década de los treinta cuando la Gran Depresión dio paso a una carrera armamentística y después a la II Guerra Mundial. Igual sucedió durante la Guerra Fría, cuando la carrera de armamento en el espacio facilitó la aparición de complejas tecnologías de la información y comunicación que se han convertido en la base de una estructura tecnológica que ha impulsado la economía mundial durante los últimos treinta años. Ahora nos enfrentamos a una crisis similar. El mundo está cambiando a un nuevo sistema tecnológico.



Aristotle’s Philosophy of Mathematics

Por • 26 ago, 2014 • Category: Filosofía

Historically, the philosophy of mathematics is a strange tale of a science which initiated the scientific method, soon became the queen of the sciences by claiming philosophical supremacy, took one step backwards when its limitations were pointed out, continued spectacularly its technical advance for over 2000 years, but lately suffered a split personality because mathematicians were gradually paying less attention to the philosophy of mathematical objects and practically no attention to the contribution of the past.



Temporal Evolution of Social Innovation

Por • 26 ago, 2014 • Category: sociologia

Acceptance of an innovation can occur through mutliple exposures to individuals who have already accepted it. Presented here is a model to trace the evolution of an innovation in a social network with a preference λ , amidst topological constraints specified mainly by connectivity, k and population size, N k . With the interplay between properties of innovation and network structure, the model attempts to explain the variations in patterns of innovations across social networks. Time in which the propagation attains highest velocity depends on λ −2 k −2 N 1/2 k . Dynamics in random networks may lead or lag behind that in scale-free networks depending on the average connectivity.



Declaración Política

Por • 25 ago, 2014 • Category: Nacionales


Con el debido respeto

Por • 25 ago, 2014 • Category: Nacionales

La estrategia a seguir es clarísima: liberación cambiaria, flexibilización de precios



El califato contra todos los demás

Por • 25 ago, 2014 • Category: Internacionales

En los interminables realineamientos geopolíticos de Medio Oriente, el califato del Estado Islámico (antes Isis o Isil) parece haber amedrentado al resto de los grupos involucrados en la política de Medio Oriente, orillándolos a formar una alianza geopolítica de facto. Repentinamente, encontramos a Irán y a Estados Unidos, a los kurdos (tanto en Siria como en Irak) y a Israel, a Turquía y al gobierno sirio de Bashar al Assad, a Europa occidental (Gran Bretaña, Francia y Alemania) y a Rusia persiguiendo, por diferentes vías, un mismo objetivo: impedir que el califato se expanda y se consolide.



The Function of the Second Postulate in Special Relativity

Por • 24 ago, 2014 • Category: Opinion

Many authors noted that the principle of relativity together with space-time homogeneity and isotropy restrict the form of the coordinate transformations from one inertial frame to another to being Lorentz-like. A free parameter in these equations, k , plays the part of c−2 in special relativity. It is usual to claim that k is determined by experiment and hence, that special relativity does not need the postulate of constancy of the speed of light. I analyze how one would go about determining k empirically and find that all methods suffer from severe problems without further assumptions, none as simple and elegant as the postulate of constancy of the speed of light. I conclude that while the formal structure of the transformation equations can be determined without appeal to the second postulate, the theory is left without physical content if we ignore this postulate.



DPR army encircles large Kiev military grouping

Por • 24 ago, 2014 • Category: Política

The army of the self-proclaimed Donetsk People’s Republic (DPR) has blocked completely a large grouping of Kiev military forces in six republican settlements on Sunday. The headquarters of the 8th army corps, 28th and 30th motor rifle brigades, 95th Ukrainian air mobile brigade, punitive battalions Aidar, Donbass and Shakhtersk were entrapped, the DPR army headquarters said citing reconnaissance data. “Around five thousand servicemen with weapons and around 50 tanks, more than 200 combat armoured vehicles, about 50 multiple launch rocket systems Grad and Uragan, more than 100 artillery guns and mortars were blocked in the trap,” the army headquarters said.