Ariane 5

During Ariane 5 launch, the software failure occurred when an attempt to convert a 64-bit floating point number to convert a 64-bit floating point number representing the horizontal velocity to a signed/fixed 16-bit integer caused the number to overflow (become too big). The floating point number was too large to be represented in 16-bit (i.e. Ariane 4 software) and this hence caused a numeric overflow. The maximum value that can be represented in 16-bit is 32768. And the horizontal velocity which

exhaustive test set is in detecting possible faults in the circuit under test (CUT). Example: SRT Algorithm. [3] System Design Failure are failures in a design, a manufacturing or an assembly process, or a product or service. The Pentium Bug and Ariane 5 Disaster are some of the system design failures. The Pentium Bug: THE ISSUE: The Pentium bug or Pentium FDIV bug was a computer arithmetic bug that affected the floating point unit (FPU) instruction set of

# P1 - Q26 ###Therac-25 The Therac-25 incident is one of the more difficult to understand. AECL, the company which designed and manufactured Therac-25 is opaque, and gives little to no information on how the software was developed. There is no one incident report, as this took place over two years and 6 unrelated accidents. Many institutions did not even realize the cause patients’ radiation burns and later medical issues until months after. Most of what follows is based on a paper by Nancy Leveson

system. 4. Not planning and designing for unexpected inputs or circumstances. 5. Insufficient testing. 6. Reuse of software from another system without adequate checking. 7. Overconfidence in software. 8. Carelessness. · Management and use 1. Data-entry errors. 2. Inadequate training of users. 3. Errors in interpreting results or output. 4. Failure to keep information in databases up to date. 5. Overconfidence in software by users. 6. Insufficient planning for failures

Araine 5 was a rocket designed by the European Space Agency. The rocket was set to launch on June 4, 1996 in Guyana. However, due to the carelessness of the designers, the rocket only lasted for thirty-seven seconds before it had to be destroyed. The cause of this malfunction was due to software errors that were not previously tested. A rocket requires the accuracy of a computer to generate calculations and corrections several times in a second. This accuracy is computed from an inertial navigation

classified as a requirements error rather than a programming error. The program was written against Ariane 4 requirements; these requirements were not transferred to the Ariane 5 requirements spec; the Ariane 5 requirements therefore did not state the range requirement; the (implicit in Ariane 5) range requirement was in conflict with the behavior of Ariane 5 (as in fact explicated in other Ariane 5 requirements); requirements came up against behavior and the rocket was destroyed. (It is not surprising

Academia.edu,….. “the failures of Ariane 5 include the following 1) It was a software failure, which could have been revealed with more extensive testing. This is true: the committee investigating the event managed to expose the failure using extensive simulations. 2) The failure was caused by reusing a flawed component. This is true as well but, because of physical characteristics of the Ariane 4, this flaw had never become apparent. There had been many successful Ariane 4 flights, using essentially

Captivating, peculiar and haunting; the production of ‘Les Ephemeres’ by French theatrical troupe Theatre Du Soleil is directed by the company's artistic director Ariane Mnouchkine. Ms Mnouchkine, along with her theatre company, together present us with perfect naturalism, in the way they move, express emotional and their high attention to detail. The nearly five and a half hour show, makes for a jaw dropping night at the theatre for a mature audience. The production is comprised of dozens of vignettes

So You’ve Decided to visit Earth. Pamphlet with 10 simple rules to aid your survival on the world of this up and coming hostile species Paid for by the Galactic Confederation. Rule Number 1: Eavesdrop, Eavesdrop, Eavesdrop. The gateway to understanding human mind is spending time reviewing their transmissions. Remarkably un-shy and very gregarious, they have been broadcasting both their audio and visual entertainment for decades much to the annoyance of other neighboring, less chatty species

If,for the same work,women make only 77 cents for every dollar a man makes, why don’t business hire only women? Wages are the biggest expense for most. So, hiring only women would reduce costs by nearly a quarter and that would go right to the bottom line. Don’t business want to be profitable. Or, are they just really bad at math? Well,actually,it’s the feminists,celebrities and politicians spreading this wage gap myth who have the math problem. Here’s why. The 77-cents-on-the-dollar statistic is