Decision making in areas such as production planning, distribution and grid management, logistics or financial portfolio management is usually based on mathematical models, mathematical optimization themselves. Let us assume that we have to take a decision of how many units to produce of two products A and B. The production system is common and has […]
We shall close with this entry our series (I, II, III) about the origins of Islam, indicating some further interesting facts about the Qur’an. 4) By Muhammad’s time, the Arabic alphabet contained no marks for vowels; furthermore, some groups of consonants were written with exactly the same character (e.g., the symbols for sounds b, t […]
Entanglement is a fundamental tool in quantum computing and several quantum information protocols, such as quantum teleportation, quantum cryptography and quantum key distribution. The basic unit of entanglement is the entangled bit ( ebit ), represented by a maximally entangled state of two qubits (quantum bits). Entanglement can also be implemented in a higher dimensional […]
A complex myriad of factors, many of them related with the global economic crisis, have given rise to a large number of social movements in the latest years. From the Occupy movement to the Arab Spring, or the more recent Turkish protests, most of these phenomena share a notorious fact: having the social networking and […]
A naïve application of simple economic models will predict that, as immigrants enter, the wages or the employment rate of native workers decrease. However, immigrants are not only workers, and they may bring with them entrepreneurship skills, so that they influence not only the supply side of the labor market, but the demand as well […]
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The mad hatterpillar These caterpillars are native to Australia and eat eucalyptus trees. Why do they build themselves a hat? No one really seems to know why the caterpillars keep their old heads hanging around. Bug Girl’s Blog When Cleaning fMRI Data is a Nuisance A flaw in data processing could be leading to biases […]
Among his around 1525 papers, Paul Erdős considered On sets of distances of n points as his most important contribution to discrete geometry. There, he stated: On the boundary of every convex body, there exists a point P such that every circle with center P intersects that boundary in at most 2 points. (Note that […]
The word “species” is one of the most relevant and controversial in the history of Biology and has often become the main topic of many books and articles. It seems that biologists can do their job quite well and understand each other as if all of them shared a tacit agreement on the meaning of […]
Now that Saturn is visible in the sky at dusk, it is fairly easy to spot its biggest satellite Titan with a small telescope. Don’t expect nothing more than a bright point in the sky but it is provocative to imagine the Huygens probe descending into its thick atmosphere in the beginning of 2005. It […]
In the last entries of our series on the origins of Islam we shall explore some of the information contained in or directly connected to the Qur’an itself. As I explained in the previous article, the Holy Qur’an is the only important Arabic written document from the VIIth century. Even stone inscriptions in Arabic are […]