T his is a closed-book quiz. Quick, now— what percentage of software projects fail? Let me hazard a guess as to your answer. Odds are, you said something like " 70 percent. " Am I right? Now, I want to analyze why you said whatever you said. A friend of mine, Nicholas Zvegintzov (the Chief Guru of software maintenance), likes to say that, if you track down the sources of the things we " know " ...

Planck Spectroscopy Existing spectrometers rely on wavelength-selective optical components such as gratings or prisms. As featured the cover, a new spectroscopic technique–Planck spectroscopy–that does not require any is demonstrated in article number 2100121 by Mikhail A. Kats and co-workers. The technique relies fundamental relationship that relates temperature to spectrum of blackbody radiat...

Tandem computers are employed extensively in heavy volume, OnLine Transaction Processing environments. Tandem systems can be found in 24 of the top 25 US banks; 32 of the top 50 European banks; 250 brokerage and security firms; 60 major insurance companies; and in 40of the world s busiest stock and commodities exchanges. Tandem computers run 75% of all automated teller machine transactions, 66%...

Aneurysms need accurate millimeters (mm). Direct millimeters were lost with digital subtraction angiography (DSA) years ago, with measurements in pixels. Advances in DSA can now give inherent millimeters. The Cerecyte aneurysm coiling trial's angiographic core lab assesses images from compact disc (CD). External fiducials for millimeter calibration are required. Of 25 cases with two 10 mm fiduc...

In this work, we have tested 30 different adsorption situations in several coverage scenarios for the 1-amino-3-cyclopentene (ACP) molecule on the Si(100) surface. We have used a five-spot testing zone inserted in the high-level part of a quantum-mechanical/quantum-mechanical study performed in a big cluster. By defining several different scenarios, each one with a typical adsorption energy, we...

The absorption of NO(3) (-) was characterized in six regions of a 7-d-old corn root (Zea mays L. cv W64A x W182E) growing in a complete nutrient solution. Based on changing rates of (15)N accumulation during 15-min time courses, translocation of the concurrently absorbed N through each region of the intact root was calculated and distinguished from direct absorption from the medium. Of the (15)...