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21 May 15:27

Navegando sin GPS

by Web oficial de Arturo Pérez Reverte

El otro día, en el mar, se fueron todos los instrumentos al carajo. Era de noche, estábamos en viaje de vuelta, en mitad de una niebla espesa, y yo acababa de fondear el velero en cuatro metros de sonda con treinta y cinco de cadena. Si la avería, o lo que fuera, llega a ocurrir media hora antes, las habría pasado mortales: no habría tenido más remedio que mantenerme al pairo lejos de la costa, esperando que con el día levantase la niebla, con cuanta luz a bordo pudiera tener encendida, haciendo sonar la bocina de vez en cuando y rezando, o lo que equivalga a eso, para que no apareciera de la nada otro barco y me metiera la proa en el través.

El caso es que, como digo, mientras a la luz de la mesa de cartas anotaba las incidencias en el cuaderno de bitácora, comprobé que las pantallas de los instrumentos no marcaban nada, y que el GPS que proporciona al barco la latitud y la longitud se había vuelto majara; daba posiciones imposibles, el AIS tenía errores y las cartas electrónicas me situaban, como a Tintín y al profesor Tornasol en El tesoro de Rackham el Rojo, a veces en la ciudad del Vaticano, y otras en Australia o en el Caribe. Resumiendo: no había un maldito aparato de ayuda a la navegación que funcionara, excepto, comprobé con alivio, la radio y el piloto automático. Eso era importante, pues antes del amanecer yo debía levar ancla de nuevo. Si el piloto funcionaba, no habría problema ninguno, me dije. Todo era cuestión, si los satélites seguían funcionando con normalidad en el cielo, de sacar el GPS portátil que llevo en la bolsa Mayday, con el equipo de supervivencia por si un día vienen mal dadas.

Lo hice. Aparté la baliza, las bengalas, la linterna, el cuchillo, y encontré el pequeño aparato. Pero al ir a encenderlo se me heló la sangre: no funcionaba. Lo abrí, inquieto, y comprobé que se habían sulfatado las pilas, dejándolo inservible. Maldiciendo mi torpeza, intenté limpiarlo y despejar los contactos, sin éxito. Estaba tan muerto como mi abuela. Recordé entonces que a bordo llevo un tercer GPS de modelo muy antiguo, trofeo de un antiguo reportaje para la tele, cuando perseguía planeadoras con la gente de Vigilancia Aduanera y, tras una movida algo particular, mi compadre Javier Collado, piloto del helicóptero Argos, me regaló el aparato con el que se guiaban los malos. Lo encontré en un cajón de la camareta, le puse pilas, y tampoco. Demasiado tiempo, quizás. Demasiado viejo, casi treinta años después. A mi latitud y longitud -las presentes las conocía, me preocupaban las futuras- las había mirado un tuerto electrónico. Así que subí a cubierta y, rodeado de...

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13 May 21:34

MENSAJE

by MEL

13 May 12:36

Chim-pum

by MEL

13 May 12:27

Photo





13 May 10:22

Old Files

Wow, ANIMORPHS-NOVEL.RTF? Just gonna, uh, go through and delete that from all my archives real quick.
09 May 14:03

Train

Trains rotate the Earth around various axes while elevators shift its position in space.
08 May 10:21

[Video] F/A-18B Hornet jets take off in 30 – 40 knot crosswind

by David Cenciotti

Two Royal Australian Air Force F/A-18 Hornet jets take off in 30 – 40 knot crosswind from Illawarra Regional Airport in Australia

Filmed at Wing Over Illawarra airshow 2014, at Illawarra Regional Airport, in New South Wales, on May 4, the following footage shows two RAAF F/A-18B Hornets taking off in strong crosswinds from the airfield located about 50 kilometers to the southeast of Sydney, Australia.

Strong crosswinds prevented the majority of aerobatic displays at WOI airshow. Nevertheless, the two Hornets were able to launch, even if sensibly shaken by the 30 – 40 knot crosswind!

Note the skid marks (or tracks left in the dust) left on the runway by two Hornets!

 

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30 Apr 14:15

El portal porno PornHub quiere reforestar la tierra: plantará un árbol por cada cien vídeos vistos

Curiosa iniciativa la del portal de vídeos porno PornHub. El conocido "YouTube del porno" ha decidido celebrar el Día del Árbol plantando un árbol por cada cien vídeos vistos de la categoría "Big Dick" de su amplio "catálogo". Desde que comenzó la campaña llevan más de 12.000 árboles plantados, lo que significa más de un millón de vídeos vistos.


El Arbor Day, el día del árbol en EE.UU., se celebra el último viernes del mes de abril y tiene por costumbre que cada persona plante un árbol. Veremos si a alguno de estos árboles le da por crecer como el de la foto.

El portal porno PornHub quiere reforestar la tierra: plantará un árbol por cada cien vídeos vistos
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28 Apr 08:31

¿INQUIETUD?

by MEL

23 Apr 11:38

Curso Interactivo de Física en Internet de la universidad del Pais Vasco

by Julio Sanchez

Curso Interactivo de Física en Internet de la universidad del Pais Vasco

 http://www.sc.ehu.es/sbweb/fisica_/index.html

Hace tiempo os traje el canal de youtube dedicado a las Matemáticas ( ¿tienes problemas con las #matemáticas? Aqui esta la solución.), ahora os traigo una web dedicada a la Física para todos los niveles. 

Su autor es Ángel Franco García, y describe esta web así:


"El Curso Interactivo de Física en Internet, es un curso de Física general que trata desde conceptos simples como el movimiento rectilíneo hasta otros más complejos como las bandas de energía de los sólidos. La interactividad se logra mediante los 646 applets insertados en sus páginas webs que son simulaciones de sistemas físicos, prácticas de laboratorio, experiencias de gran relevancia histórica, problemas interactivos, problemas-juego, etc.
El Curso Interactivo de Física en Internet cambia de estructura y de presentación e incorpora nuevos contenidos: problemas resueltos, clips de vídeo y fotografías de prácticas de laboratorio y demostraciones de aula. Utiliza CSS para dar formato a las páginas, MathML para las fórmulas matemáticas, Flash 8 de Adobe para el vídeo interactivo.
Para ver los contenidos multimedia del Curso, su navegador tiene que tener instalados los siguientes componentes adicionales: la Máquina Virtual Java para correr los applets, FlashPlayer, para el vídeo interactivo y animaciones Flash.
Las fórmulas matemáticas se han representado en las páginas web mediante código MathML. Para visualizar las fórmulas matemáticas en todos los navegadores se utiliza Mathjax. Habitualmente, los navegadores utilizan la opción MathRenderer/HTML-CSS, salvo Internet Explorer que utiliza la opción MathML ejecutando el programa MathPlayer.Si las fórmulas matemáticas aparecen en su navegador demasiado grandes puede reducirlas de tamaño, pulsando el botón derecho del ratón y accediendo a la opción del menú Math Settings/Scale All Math/.., tal como se aprecia en la figura"


Es una web muy completa, aquí  pongo el indice general de los temas tratados:


  1. Unidades y medidas
  2. Cinemática
  3. Dinámica
  4. Dinámica Celeste
  5. Sólido Rígido
  6. Oscilaciones
  7. Movimiento Ondulatorio
  8. Fluidos
  9. Fenómenos de transporte
  10. Física estadística y Termodinámica
  11. Electromagnetismo
  12. Mecánica cuántica


Dentro de este indice general, hay otro subindice, por ejemplo, en el de Dinámica:
Y dentro de este subindice hay otro que ya trata del tema en cuestión, por ejemplo en Fuerza de rozamiento:
  1. El rozamiento por deslizamiento
  2. Medida del coeficiente de rozamiento por deslizamiento
  3. Fuerza de rozamiento en un plano inclinado
  4. El mejor ángulo para arrastrar un bloque
  5. Medida del coeficiente de rozamiento estático
  6. Una barra horizontal apoyada sobre dos puntos móviles.
  7. Oscilaciones de una placa horizontal apoyada en dos ruedas que giran
  8. Movimiento de dos bloques superpuestos(I)
  9. Movimiento de dos bloques superpuestos (II)



Ejemplo de la explicaciones de teoría:
http://www.sc.ehu.es/sbweb/fisica_/dinamica/cohetes/cohete/cohete.html



Ejemplos interactivos:
El juego del baloncesto: Tiros frontales a canasta
http://www.sc.ehu.es/sbweb/fisica_/cinematica/curvilineo/baloncesto/balonces.html

Simulador: Descenso del módulo lunar
Simulador de mareas teniendo en cuenta atracción lunar y el sol
http://www.sc.ehu.es/sbweb/fisica_/celeste/mareas/mareas.html

Una ayuda inestimable para los que estudian Física, o estén interesados en ella.
 ¡¡ me hubiera venido de perlas, cuando estudiaba!!!


 Nota:
Aconsejo usar Chrome y tener activado Java, para poder ver los programas de ejemplo (son applets de java).

20 Apr 20:46

No supieron morir de otra manera

by Web oficial de Arturo Pérez Reverte

Me quedan vivos un par de amigos espías, o que lo fueron, o están a pique de dejar de serlo. Espías de verdad, quiero decir, de los de antes, con alguno de los cuales comparto intensos recuerdos africanos que, hace ya diez o quince años, mencioné por encima en esta misma página. Con otro de ellos, más reciente, comí hace poco para charlar de nuestras cosas; y en el transcurso de la conversación me pidió que algún domingo dedicara un recuerdo a los siete compañeros que -noviembre de 2003, hace poco se cumplieron diez años- murieron en el combate de Latifiya, Iraq. Y aquí me tienen ustedes. Cumpliendo.

Eran espías de verdad, no hurones de cloaca especialistas en Corinnas, Bárbaras y braguetas reales. Tengo ante mí en este momento la carta de uno de ellos a su familia; y yo mismo, que vivo de contar historias, no podría narrar mejor lo que aquellos siete compatriotas nuestros, más el que sobrevivió del grupo, hacían allí, en un podrido rincón del mundo. Si han visto ustedes aquella película -buenísima- de Leonardo DiCaprio y Russell Crowe sobre agentes en Iraq, dejarán poco espacio a la imaginación: hacían exactamente lo mismo, con la diferencia de que, en vez de tener detrás el respaldo de la nación más poderosa del mundo, tenían lo que ustedes y yo tenemos aquí. Fotografiaban a miembros de Al Qaeda cuando salían de las mezquitas, se entrevistaban con líderes chiítas radicales, vestían como árabes, trataban con traficantes de armas y asesinos, falsificaban los documentos de sus propios coches, bebían cerveza camuflada en latas de refresco, dormían con una pistola debajo de la almohada y salían cada día a la calle, a hacer su trabajo -eran humildes soldados de España, sin uniforme, en misión en el extranjero- pensando que quizá ése iba a ser el día en que los secuestraran y llevaran a una casa remota, escondida; y allí, donde nadie pudiera oír sus gritos, los torturaran durante días, como a bestias, antes de degollarlos ante una cámara de vídeo para que sus padres, mujeres e hijos pudieran verlo a gusto en Internet. Hacían todo eso que dije antes, cada día, recorriendo Bagdad, tragándose el miedo mientras escuchaban canciones de Sabina en el radiocasete del coche, o como se llame eso ahora. Hacían su trabajo con valor y decencia. Se ganaban el jornal. Hasta que un día, en la ruleta de la suerte, o de la vida, salió su número.

Hay por ahí unos viejos versos un poco cursis, pero cuyo final es hermoso: No supieron querer otra bandera / no supieron morir de otra manera. Y así sucedieron las...

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19 Apr 08:36

El cura cantante

by victor@helektron.com (Helektron)

Atentos a este cura que se clavó una canción como Dios manda en la celebración de una boda.

el cura cantante 150x150 El cura cantante

el cura cantante

La canción en este caso fue la de Leonard Cohen “Hallelujah” donde se modificó ligeramente la canción, pero a decir verdad es impresionante. Pasen y vean:

el cura cantante El cura cantante

La entrada El cura cantante aparece primero en Helektron.com.

17 Apr 10:32

Amelymeloptical Illusion, a seemingly simple yet enthralling...

by rion


Amelymeloptical Illusion, a seemingly simple yet enthralling rings performance from French juggler Lindzee Poi.

Next, watch French “magic” champ Yann Frisch and Sylvain’s bulles de savon géantes.

via Daily Picks and Flicks.

13 Apr 11:16

PISA (again)

by MEL

11 Apr 09:11

Heartbleed Explanation

Are you still there, server? It's me, Margaret.
08 Apr 15:02

Heroes of Hardware Revolution: Bob Widlar

by Aleksandar Bradic

Bob Widlar (1937-1991) is without a doubt one of the most famous hardware engineers of all time.  In fact, it would not be an exaggeration to say that he is the person who single-handedly started the whole Analog IC Industry. Sure, it’s Robert Noyce and Jack Kilby who invented the concept of Integrated Circuits, but it’s Widlar’s genius and pragmatism that brought it to life. Though he was not first to realize the limitations of planar process and designing ICs like discrete circuits, he was the first one to provide an actual solution - µA702, the first linear IC Operational Amplifier. Combining his engineering genius, understanding of economic aspects of circuit design and awareness of medium and process limitations, he and Dave Talbert ruled the world of Analog ICs throughout the 60s and 70s. For a significant period of time, they were responsible more than 80 percent of all linear circuits made and sold in the entire world.

Bob Widlar

 

The list of his designs includes gems such as µA709, improvement over original µA702 and a Fairchild’s flagship product for years, µA723 – first integrated voltage regulator and LM10 — the first ultra-low-voltage opamp, which is still in production today. Students usually learn about Widlar via the textbook-classic: Widlar Current Source, a key piece in many of his designs, and the Bandgap Voltage Reference - both of which provide an infinite supply of mind-boggling exam problems. If there is one theme that’s common across all of Widlar’s designs, it’s that he has never designed an obvious circuit in his life. Every Widlar design comes with a twist, a unique idea and very often, a prank. A classic example of this is the story of LM109, the industry’s first three-terminal adjustable voltage regulator. In 1969, Widlar wrote a paper in which he argued against feasibility of monolithic voltage regulators due to temperature swings and packaging limitations. Since he was already an engineering legend by that time, the industry took it seriously and people gave up trying to pursue such devices. Then in 1970, he presented a circuit – LM109 – which used his bandgap voltage reference to achieve exactly such “impossible” functionality. It is most likely that he submitted both works within days from one another.

500004851-03-01

In addition to being a brilliant designer, Widlar was a personification of an age to come in Sillicon Valley, combining counter-cultural and in-your-face attitude with entrepreneurial passion and desire to build products that people love. He worked directly with customers and wrote his own app notes and data sheets. In fact, Widlar’s µA702 laid out the blueprint for how all analog IC data sheets are to be written in the future. His principle was “designing for minimum phone calls” and “if you make a million ICs; you get half a million phone calls if they don’t work right”. He was both destroyer of the worlds and creator of new markets; he came into Fairchild claiming that “what they do in analog is BS”, but left the company as a dominant player in linear IC for years to come, mostly on the wings of his designs. He then moved to Molectro (owned by National) but quickly ended up turning the parent company upside down and making into an Analog powerhouse. At the age of 33 he cashed out and retired in Mexico. But his hands couldn’t stay idle for too long. He soon came back as a contractor for National and, in 1980, ended up founding Linear Technology with Robert Swanson and Bob Dobkin,

National Semiconductor (Widlar's Idea)

Still, he always remained a troublemaker, free thinker, and an HR nightmare… closer in spirit to someone like Hemingway than a fellow “professional” engineer. Such attitude was contagious and it inspired a whole new wave of “prankster” analog geniuses like Bob Pease and Jim Williams. Widlar’s pranks are too many to count and it’s really hard to pick one that captures the spirit of the times the best. Maybe it’s when Widlar brought sheep to the front of National as a reaction to the firm not mowing the lawns due to cost-cutting (he really just needed an excuse to annoy the upper management). Or when he cherry-bombed the intercom speaker, again, just to upset one of National’s Vice Presidents. Some of the pranks were actual hardware, like a “hassler” circuit he built to detect audio, convert it to a very high audio frequency and play back the converted sound. The net effect of such a design was that the louder someone talked in the office, the more annoying the “ringing” effect caused by the feedback was. As a person would stop shouting to hear what’s causing the ringing, the effect would disappear as well. This way, he managed to get everyone in the office into speaking quietly, Pavlov-style.

Widlar and the Sheep : A Performance Piece

Widlar passed away in 1991 but his legacy lives on. He truly was the original hardware hacker and more than just an engineer – he was an Artist. It’s because of guys like him that Analog still has that special feel and is more about “invention” than just following the straightforward path between A and B. And that is why Analog guys still greet everyone else with a “Widlar Salute”.

Widlar Salute

Now, when I have finished my inspection, and I am still mad as hell because I have wasted a lot of time being fooled by a bad component – what do I do? I usually WIDLARIZE it, and it makes me feel a lot better. How do you WIDLARIZE something? You take it over to the anvil part of the vice, and you beat on it with a hammer, until it is all crunched down to tiny little pieces, so small that you don’t even have to sweep it off the floor. It makes you feel better. And you know that that component will never vex you again. That’s not a joke, because sometimes if you have a bad pot or a bad capacitor, and you just set it aside, a few months later you find it slipped back into your new circuit and is wasting your time again. When you WIDLARIZE something, that is not going to happen. And the late Bob Widlar is the guy who showed me how to do it.

Bob Pease – Troubleshooting Analog Circuits

 References

[1] Bo Lojek – History of Semiconductor Engineering, Springer, 2007

[2] Bob Pease – Troubleshooting Analog Circuits, 1987

[3] http://en.wikipedia.org/wiki/Bob_Widlar

[4] http://readingjimwilliams.blogspot.com/2012/04/my-favorite-widlar-story.html

[5] http://analogfootsteps.blogspot.com/search/label/Bob%20Widlar

[6] http://electronicdesign.com/analog/what-s-all-widlar-stuff-anyhow

[7] http://silicongenesis.stanford.edu/transcripts/dobkinwilliams.htm

[8] http://edn.com/electronics-blogs/anablog/4311277/Bob-Widlar-cherry-bombs-the-intercom-speaker-item-2

 


Filed under: Featured, rants
01 Apr 09:50

CAMPAÑA

by MEL

29 Mar 21:34

UNA HORA MENOS

by MEL

26 Mar 15:53

A PROPÓSITO DE SUÁREZ

by MEL

26 Mar 11:05

22-M (día después)

by MEL

24 Mar 19:14

22-M

by MEL

21 Mar 18:08

Discriminación positiva (versión Beta)

by simpulso
FOTO: Evan Forester

FOTO: Evan Forester

Ernesto explotó en mi taxi: “No aguanto. Te juro que no aguanto. Siete años llevo sufriendo el acoso de mi exmujer. Y lo peor de todo es que utiliza a los niños, ¡a mis hijos! Mintió en el juicio, ¿sabes? Le dijo al juez que yo la maltrataba, que era un hombre violento con ella y con mis hijos, y dios sabe que eso no es verdad, ¡jamás le he puesto la mano encima a nadie! Lo dijo sin presentar parte médico ni nada y el juez la creyó. Orden de alejamiento y pensión alimentaria. Tampoco tengo régimen de visitas: no sé nada de mis hijos, y cada vez que intento acercarme a ellos, la muy bruja llama a la policía. Yo sólo quiero verlos crecer, ¡son mis hijos! También se quedó con el piso, claro. Y yo a la puta calle, a mis cuarenta y tres años y viviendo desde hace siete en un piso compartido con dos estudiantes y un parado. Con mi sueldo de conductor de autobuses, imagínate. Imposible rehacer mi vida. Normal que de vez en cuando me den crisis de ansiedad y tenga que ir a urgencias a que me den algo. Ahora mismo vengo de urgencias, y el médico me ha recomendado reposo. También quería darme la baja laboral durante un par de semanas, pero soy autónomo, y no me puedo permitir estar de baja. Me darían menos de lo que gano currando; igual que tú en tu taxi, supongo. Te juro que a veces me dan ganas de hacer una locura. No lo justifico en ningún caso, y menos cuando hay niños de por medio; me horripila la violencia, pero te juro que a veces entiendo a esos hombres que se lían a tiros por venganza y luego se quitan de en medio. Y que dios me perdone por lo que acabo de decir, que dios me perdone. Pero muchos en mi lugar, con lo que estoy pasando y sin esperanzas de nada, sin ayudas, sin ganas de seguir, ya lo habrían hecho”.

20 Mar 14:55

SEGA's Crazy Taxi Game is Free Today [Download]



SEGA is offering its Crazy Taxi game free today ahead of the official launch of the all-new Crazy Taxi: City Rush game.

Now FREE for a limited time. The all-new Crazy Taxi is coming soon. Download the original FREE today and play like crazy while you wait! Offer ends 3/19/2014.

Description:
Hey hey, come on over and have some fun with Crrrrrazy Taxi! Barrel through traffic packed streets, hurdle off parking garages, and crazy combo your way to crazy money in a wild frantic race to scare up the most fares. In Crazy Taxi, time is money, and only the craziest cabbies come out victorious.

Features:
TRANSPORT BACK TO 2000
-Remastered for mobile devices based on the hugely popular Dreamcast Classic
-Rock out to original music by The Offspring and Bad Religion

FIERCE ENVIRONMENTS TO MAKE YOUR PASSENGERS GO INSANE
-Extra large hills for extra long hang time
-Parked transporters with conveniently angled ramps
-Painfully slow buses and cable cars to frustrate and annoy
-Occasional deep sea exploration opportunities

DONT GET TOO DELIRIOUS
-Choose from 3, 5 or 10 minute game play in Arcade Mode and Original Mode
-Play in touch or tilt control modes





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11 Mar 22:53

What we know and what we don’t about the mysterious Malaysia Airlines MH370 disappearance

by David Cenciotti

Some 72 hours after contact with the Boeing 777 flying over the Gulf of Thailand was lost, what really happened to Malaysia Airlines MH370 flight remains a mystery.

It’s almost impossible to say what happened to Malaysia Airlines MH370 flight until the remains of the aircraft, its Flight Data Recorder and Cockpit Voice Recorder are found and analysed,  along with all the other data, by investigators.

That said, we can surely sum up what we currently know and what we still don’t know about the fate of the Boeing 777 9M-MRO flying from Kuala Lumpur to Beijing on Mar. 8, 2014.

Facts:

Malaysia Airlines flight MH370 has disappeared from radars about 40 minutes after take off from Kuala Lumpur. According to the ADS-B data the wide body was cruising at 35,000 feet at 471 knots. Last ADS-B data from the aircraft was collected at 17:21:03.

Weather was fairly good and no turbulence was reported before the aircraft was lost.

Between 17:19 and 17:20 the aircraft turned right, changing heading from 25 to 40 degrees. Someone said this is a sign the aircraft was turning back to Kuala Lumpur or had already experienced an in-flight problem. However, the change in heading was probably performed in accordance with the FPL (Flight Plane) as the plane did the same, at the same position, on Mar. 4, 2014.

The last location tracked by Flightradar24 is Lat: 6.97 Lon: 103.63.

The FR24 coverage in that area is good up to 30,000 feet: at lower altitudes, aircraft are invisible to the network’s receiving stations.

What happened after 17:21:03?

ADS-B transponders transmit data twice per second but FlightRadar24.com samples data (speed, position, altitude) every 10-60 second depending on altitude: MH370 data was collected every half minute during the last 10 minutes.

So, the receiving station was expecting to collect and store data from MH370 around 17:21:33. Since no data was saved past 17:21:03 there are three possibilities:

a) The aircraft disintegrated mid-air;

b) The aircraft plunged more than 5,000 feet in 30 seconds (from 35,000 to less than 30,000, where, as said, it was invisible to radars): a steep dive that would equal to 10,000 feet per minute rate of descent or more;

c) The aircraft onboard ADS-B transponder was switched off or failed.

What we don’t know yet:

Since no debris was found yet, we don’t know what happened aboard MH370. Actually, we can’t even be 100 percent sure it crashed (even if it is likely). As already explained, it may take days or weeks to find the debris at sea, months to recover parts of the plane from the sea (even though the Gulf of Thailand is not as deep as the Atlantic Ocean and recovery would be faster than that of AF447 which crashed in 2009).

It is still hard to say whether the two passengers using stolen passports had an active role in the mishap.

Several theories:

- Structural collapse: unlikely. The aircraft was flying at cruising altitude. No turbulence reported. Still, possible.

- Hijacking went wrong: the crew may have suffered a cockpit intrusion and the aircraft might have plunged because of a fight in the cockpit. Or the hijacking attempt may have been conducted by the pilot or copilot (as happened for recent Ethiopian airlines flight).

- Terrorist attack: possible, even if the lack of claim of responsibility makes it a bit less likely as time goes by.

- Suicide: unlikely, as suicide victim usually leaves a message behind.

- Uncommanded bomb detonation: terrorists were carrying a bomb to China, but the bomb detonated unexpectedly.

- Unknown aircraft system failure: a catastrophic failure to any on board system or the lack of cabin pressurization that forced the crew to perform a sudden steep descent but left the plane uncontrollable or the crew unconscious as is dived towards the sea. The fact that the crew did not radio any mayday is not relevant: “aviate, navigate, communicate” meaning that before using the radio pilots have to keep the aircraft in the air, navigate towards the nearest landing field and then communicate the emergency to the ATC (Air Traffic Control).

- Midair collision with another plane: much unlikely. At 35,000 feet both aircraft should have been under radar control or at least visible, unless it was some sort of military/stealth plane climbing to or descending from higher altitudes.

- Missile: fired from a ship or from another plane, by mistake or on purpose (unlikely).

Image credit: FR24

 

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11 Mar 22:40

Missing Drone Posters Are a Hilarious Look into the Future

by James Hobson

DroneMissing_1394080346156_3307703_ver1.0_640_480

Sure there are reward posters for missing cats, dogs, and other various pets — but now in Denver, a man named [Merrick] makes a plea for his $2400 missing drone.

We couldn’t help but chuckle at this news story because it could be the tip of the iceberg. As drones become more and more common place, seeing missing posters for them could become pretty normal! The problem is, when you’re using a long-range drone, and flying it in a city, it is very possible to lose your line of sight and lose the device altogether. That is exactly what happened to poor [Merrick] the other day. Thinking quickly, he started making lost drone posters, and after channel 7 news reported on it, it was discovered in an alleyway the following day. The person who found it thought it was government related and didn’t want to mess around with it — it’s a pretty serious looking drone.

The odd thing is, this type of drone has a homing feature that will automatically return the drone to its starting position in case of something like this happening — but for whatever reason, it didn’t work.

Personally if we were flying a drone worth the same amount as a decent used car… we’d throw a GPS tracker on it.

[Thanks for the tip Chips!]


Filed under: drone hacks
10 Mar 09:11

ACTITUD

by MEL

04 Mar 21:22

New video: Russian gunships cross the Strait of Kerch at low level during first phase of Crimea invasion

by David Cenciotti

Russian Mil Mi-24 Hind gunships entered the Ukrainian airspace flying at ultra-low level over the sea.

A new video taken on Feb. 28, during the opening phase of the Russian invasion of Crimea, shows Putin’s chopper armada crossing the Strait of Kerch at very low level, almost undetectable by Ukrainian Air Defense.

The Mi-24 and accompanying Mi-8/17 Hip helicopters were pivotal to the small scale “blitzkrieg” that enabled the Russian forces to occupy Ukraine’s Crimea peninsula and control some of its key installations, including Belbek airport.

 



H/T to Giuliano Ranieri for sending the link.

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04 Mar 21:20

[Video] Russian troops fire shots over the heads of Ukrainian air force personnel

by David Cenciotti

Russian troops fire shots over the heads of Ukrainian air force personnel near occupied airport Belbek Crimea.

This video shows the tense moment Russian troops met Ukrainian Air Force soldiers near the occupied airfield of Belbek, in Crimea.

“Are you going to shoot us?”… We carry the soviet flag…You would shoot the soviet flag” can be heard according to the translation provided by some media outlets.

H/T to Giuliano Ranieri for the heads-up

 

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03 Mar 20:32

[Photo] Ukrainian Air Force Su-27 Flanker heavily armed for Combat Air Patrol

by David Cenciotti

First image of Su-27 Flanker fighter jet “armed to the teeth” to perform Combat Air Patrol following the Russian invasion of Crimea.

An interesting image, showing a fully armed Ukrainian Air Force Su-27 has been published on Russianplanes.net.

Taken, on Mar. 1 by Andrey Rakul, at an undisclosed location (possibly, Mirgorod Air Base, the airbase hosting the only Ukrainian Air Force Flanker Squadron), it shows Su-27 “45 Blue” armed with 6 Vympel R-27 missiles (NATO reporting name AA-10 Alamo-C) semi-active-radar homing extended-range air-to-air missiles and 4 Vympel R-73 (AA-11 Archer), a configuration adopted for Combat Air Patrols (CAPs) established by Kiev after the Russian invasion of Crimea.

Image credit: Andrey Rakul

 

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28 Feb 20:27

Computers Playing Flappy Bird. Skynet Imminent. Humans Flapping Arms.

by Adam Fabio

flappy-double

After viral popularity, developer rage quits, and crazy eBay auctions, the world at large is just about done with Flappy Bird. Here at Hackaday, we can’t let it go without showcasing two more hacks. The first is the one that we’ve all been waiting for: a robot that will play the damn game for us. Your eyes don’t deceive you in that title image. The Flappy Bird bot is up to 147 points and going strong. [Shi Xuekun] and [Liu Yang], two hackers from China, have taken full responsibility for this hack. They used OpenCV with a webcam on Ubuntu to determine the position of both the bird and the pipes. Once positions are known, the computer calculates the next move. When it’s time to flap, a signal is sent to an Arduino Mega 2560. The genius of this hack is the actuator. Most servos or motors would have been too slow for this application. [Shi] and [Liu] used the Arduino and a motor driver to activate a hard drive voice coil. The voice coil was fast enough to touch the screen at exactly the right time, but not so powerful as to smash their tablet.

If you would like to make flapping a bit more of a physical affair, [Jérémie] created Flappy Bird with Kinect. He wrote a quick Processing sketch which uses the Microsoft Kinect to look for humans flapping their arms. If flapping is detected, a command is sent to an Android tablet. [Jérémie] initially wanted to use Android Debug Bridge (ADB) to send the touch commands, but found it was too laggy for this sort of hardcore gaming. The workaround is to use a serial connected Arduino as a mouse. The Processing sketch sends a ‘#’ to the Arduino via serial. The Arduino then sends a mouse click to the computer, which is running  hidclient.  Hidclient finally sends Bluetooth mouse clicks to the tablet. Admittedly, this is a bit of a Rube Goldberg approach, but it does add an Arduino to a Flappy Bird hack, which we think is a perfect pairing.

[Thanks Parker!]


Filed under: Android Hacks, Arduino Hacks, misc hacks