Category Archives: systems

Constructing a software design

There are two ways of constructing a software design: One way is to make it so simple that there are obviously no deficiencies, and the other way is to make it so complicated that there are no obvious deficiencies. C. A. R. Hoare

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More on Backwards Compatibility

Esta entrada pretende complementar la broma sobre Backwards Compatibility. Comenzamos. En mi Biblia de cabecera, una Biblia Devocional de Estudio editada por La Liga Bíblica, se presenta el Santo Evangelio según San Mateo como un vínculo entre el Antiguo Testamento y el Nuevo Testamento. Señala, literalmente: “Podemos decir, entonces, que el primer libro del Nuevo […]

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The Hobgoblin

Without a doubt, performance is a cornerstone of a great user experience. Like security, it is the most misunderstood and oft-used scapegoat of the software developer. It’s not uncommon to hear developers reject ideas with a flippant, “We can’t do that, it will negatively impact performance.” Rarely quantified and frequently cited, performance is the hobgoblin […]

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Instrucciones para Instrucciones

1. Nadie lee las instrucciones. 2. Toda excepción a (1) implica un desespero, una urgencia, una frustración. Las instrucciones, entonces, deben ser concisas, y organizadas de forma tal que el acceso a la información más importante resulte muy rápido e intuitivo.

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Modifying the TCP Acknowledgement Mechanism

El primer libro de un amigo mío, ya disponible en Amazon.com: Modifying the TCP Acknowledgement Mechanism: An Evaluation and Application to Wired and Wireless Networks by Andrés Arcia-Moret. Andrés es amigo, estudiante, docente, investigador, usuario de Mac, padre de familia, serio candidato a gurú universal de la computación. Doy fe de su calidad profesional y humana. […]

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Calculus of resonances in an uniform acoustic tube

We assume that the glottal end is closed, but the mouth is open. This is the configuration we are referring to: The acoustic tube is uniform, and its length is L. The glottis, located at x=-L, is closed (infinite impedance) and the mouth, located at x=0, is open (impedance zero). Now, pressure variation p(x) along […]

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Stub

What’s a stub? It obviously depends on the context. A Stub may even be a relative of the Danish poet Ambrosius Stub. After all, code is poetry. In computing, I know of 4 contexts where the word stub has a well-established meaning: Web Sites: A stub is a web page in progress, i.e., a page […]

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