Micropost

Academic researchers have improved wireless bandwidth by an order of magnitude”not by adding base stations, tapping more spectrum, or cranking up transmitter wattage, but by using algebra to eliminate the network-clogging task of resending dropped packets of data. By providing new ways for mobile devices to solve for missing data, the technology not only eliminates this wasteful process but also can seamlessly weave data streams from Wi-Fi and LTE”a leap forward from other approaches that toggle back and forth. ”Any IP network will benefit from this technology,” says Sheau Ng, vice president for research and development at NBC Universal. ...

Linux kernel developer Theodore ”Ted” Ts’o has released a series of patches for what he has called ”a Lance Armstrong bug” in the kernel, meaning behaviour that does not trip up tests but nevertheless makes the kernel work differently than intended. A user had reported a problem that caused data loss; the kernel developers quickly narrowed this down to a fault in the ext4 implementation that was introduced with the release of Linux 3.6.2 just over a week ago. Apparently, the data corruption bug was hard to track down as it only manifests itself if a system is rebooted twice in a relatively short period of time. ...

Cuando observamos el mundo físico que nos rodea, nos maravillamos de su extrema variedad y complejidad. Al examinar el mundo vivo no deja de sorprendernos la riqueza de animales y plantas que encontramos por doquier. Sería iluso pretender leer los libros que se han escrito en la historia. La música ofrece una enorme repertorio de temas que escuchar. Y el mundo digital sorprende por la desbordante cantidad de contenidos que nos presenta. Pero todos estos complejos mundos tienen algo en común: están compuestos por una pequeña cantidadde elementos combinados en gigantescos números. ...

This graphic chronicles the history of feature films from the origins in the 1910s until the present day. More than 2000 of the most important feature-length films are mapped into 20 genres spanning 100 years. Films selected to be included have: won important awards such as the best picture Academy Award; achieved critical acclaim according to recognized film critics; are considered to be key genre films by experts; and/or attained box office success. The History of Film was created by Larry Gormley, an award winning designer. ...

Supongo que todos estáis al tanto de la hazaña de Felix Baumgartner, el hombre que ha saltado desde una altura de más de 120000 pies desde un globo, convirtiéndose en el hombre que más alto ha saltado y el que ha alcanzado la mayor velocidad sin ayuda mecánica como parte de la misión Red Bull Stratos. En Pybonacci somos tan frikis, que vamos a visualizar el salto supersónico de Baumgartner como mejor se nos da: con Python ;) Nota: Esto es un artículo recreativo que he escrito en un par de horas y he hecho unas cuantas suposiciones que no tienen porqué coincidir con la realidad. Tómese esto en cuenta a la hora de valorar los resultados. ...

CSS was meant to style academic documents and simple sites (eg. wiki, blogs) where the cascade and descendant selectors makes a lot of sense. Unfortunately many sites we build nowadays are way more complex than that, and what used to work on simple projects doesn’t scale very well. We need to find smarter ways to code CSS to avoid the common issues and re-think the way we do our work. We should learn from the experience of other devs working in different domains, and apply into our own domain. Things like separation of concerns, modularity, encapsulation, DRY can (and should) be applied to large scale CSS projects as well. The main problem is that most people who are good at CSS doesn’t necessarily have a Computer Science background, most of them started as designers and learned CSS by themselves (that was my case¦). That’s the main reason why I’m writing this post. I won’t get into too much details/examples but will try to explain briefly each concept. Some of the SOLID principles are open to multiple interpretations on the CSS context - since we are shoehorning the concepts - that’s one of the reasons why I decided to not give detailed examples. I also think we should understand the idea and not be tied to a specific implementation. ...

Apple tomó muchas decisiones técnicas con el objetivo de mejorar la ”experiencia de usuario”, pero por sí mismas serían inútiles -o más perjudiciales- si no van acompañadas de medidas de control estrictas. Es fundamental el papel de los controles de las aplicaciones en el App Store (¡ojo! no los justifico). Independientemente de otras consideraciones políticas, dado su simplicidad y soluciones ad hoc, el iOS sería muy fácil de ”abusar” por los desarrolladores y aplicaciones. Por el contrario, Android es una plataforma abierta que puede user cualquier fabricante, que permite la instalación de cualquier aplicación. El control de aplicaciones del Market por parte de Google es prácticamente inexistente. Esto hace que no valgan soluciones ad hoc, obliga a implementar en el sistema operativo medidas de seguridad y control ”canónicas”, en el sentido que mantenga las condiciones fundamentales de todo sistema operativo de propósito general: eficiencia, equidad (fairness) y seguridad. ...

Working with redirections in bash is really easy once you realize that it’s all about manipulating file descriptors. When bash starts it opens the three standard file descriptors: stdin (file descriptor 0), stdout (file descriptor 1), and stderr (file descriptor 2). You can open more file descriptors (such as 3, 4, 5, …), and you can close them. You can also copy file descriptors. And you can write to them and read from them. File descriptors always point to some file (unless they’re closed). Usually when bash starts all three file descriptors, stdin, stdout, and stderr, point to your terminal. The input is read from what you type in the terminal and both outputs are sent to the terminal. ...

Have you ever tried to add a footnote to a table inside the tabular environment? Even though the index is printed, the search for the actual footnote will be in vain. » Tom | texblog.org

This course details the exploitation of SQL injection in a PHP based website and how an attacker can use it to gain access to the administration pages. Then, using this access, the attacker will be able to gain code execution on the server. The attack is divided into 3 steps: Fingerprinting: to gather information on the web application and technologies in use. Detection and exploitation of SQL injection: in this part, you will learn how SQL injections work and how to exploit them in order to retrieve information. Access to the administration pages and code execution: the last step in which you will access the operating system and run commands. » pentesterlab.com