Las 10 obras de ingeniería civil más impresionantes de todos los tiempos

Ingeniería en la Red

Estudiantes del Departamento de Ingeniería Civil de la Universidad de Norwich han creado una lista The Top 10 Most Impressive Civil Engineering Projects of All Time con las más impresionantes obras de ingeniería, desde el comienzo de la historia hasta nuestros días, además de una infografía con algunos datos sobre las mencionadas maravillas de la ingeniería civil.

El top 10 está formado por las siguientes construcciones, y que en Europa incluye al Acueducto de Segovia (acueducto romano que su constrcción data del siglo II d.C.) y el Eurotúnel (túnel ferroviario que cruza el canal de la Mancha y es el segundo túnel más largo del mundo).

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Wearable pineapple fibres could prove sustainable alternative to leather | Business | The Guardian

At weddings and formal events in the Philippines, men can often be seen wearing the Barong Tagalog, a thin and transparent embroidered garment worn over a shirt.One of the more surprising materials used in its manufacture are fibres from pineapple leaves – and long strands of the leaves could soon also be used to make a host of other products, from trainers and clothes to bags and car upholstery.Called Piñatex – piña is Spanish for pineapple – the new material was created by Carmen Hijosa, who worked as a consultant in the Philippines leather goods industry in the 1990s. She was unimpressed with the standard of goods produced and started to look for alternatives. It was the strength and the fineness of the pineapple leaf fibres used in the Barong Tagalog that first alerted her that there was another option: “I was looking for an alternative to leather. That was the beginning of my thinking. ‘What is going to be in these beautiful bags that is not leather?’,” the Spanish designer said.The breakthrough came when Hijosa realised that she could make a non-woven mesh – a fabric which is bonded together without knitting or weaving – from the long fibres, in a similar way to felt.The fibres that make up Piñatex are extracted from pineapple leaves on plantations by farmers before they are cut up and layered. They are then put through an industrial process at the end of which emerges the textile. A byproduct of the process is a biomass which can be converted into fertiliser, giving additional income to the farmers.

Source: Wearable pineapple fibres could prove sustainable alternative to leather | Business | The Guardian

7 Easy GIFs That Will Teach You All You Need To Know About Trigonometry In 5 Minutes – Via Business Insider

7 Animated GIFs That Will Make You Instantly Understand TrigonometryWalter Hickey May 13, 2013, 12:59 PM 227,380 20FACEBOOKLINKEDINTWITTEREMAILPRINTTrigonometry is the branch of math that studies triangles, with a particular focus on the relationships between angles and the lengths of corresponding sides.Interestingly enough, the trigonometric functions that define those relationships are also closely tied to circles.Needless to say, this makes trig one of the hardest topics in math for students to grasp intuitively.Part of that is the way it’s taught. Students are taught the “unit circle” and its relationship to trigonometry, but many fail to make the leap on how crucial circles are for trig functions.With static graphs and equations, it’s possible to get a handle on the rules of what various functions do and mean. However, it’s still hard to get an intuitive sense of the relationship between the circle and the trigonometric functions and the triangles.That all changes with animated GIFs. Change over time is crucial to understanding trig. With pictures like these — found on Imgur from an album linked in Reddit’s peerless Math subreddit — trig becomes a breeze.

Source: 7 Easy GIFs That Will Teach You All You Need To Know About Trigonometry In 5 Minutes – Business Insider