Variation in pelvic radiography practice: Why can we not standardise image acquisition techniques?

Digital radiography image quality: image acquisition.

This article on digital radiography image acquisition is the first of two articles written as part of an intersociety effort to establish image quality standards for digital and computed radiography. The topic of the other paper is digital radiography image processing and display. The articles were developed collaboratively by the ACR, the American Association of Physicists in Medicine, and the...

Why We Can Not Surpass Capacity: The Matching Condition

We show that iterative coding systems can not surpass capacity using only quantities which naturally appear in density evolution. Although the result in itself is trivial, the method which we apply shows that in order to achieve capacity the various components in an iterative coding system have to be perfectly matched. This generalizes the perfect matching condition which was previously known f...

Why Can We See a Local Spread of Chikungunya Virus (CHIKV) Infection?

Why don’t we practice what we teach

The development process used by academic researchers often seems unsystematic. A Software Development Life Cycle (SDLC) is seldom considered, commenting is scarce, and external documentation consists of erasure marks left on whiteboards. Configuration management is paid lip-service, but is not standard practice. This paper examines reasons behind the apparent large-scale non-adoption of softwar...

Trustworthy Software: Why we need it, Why we don't have it, How we can get it

We have become increasingly dependent on a national technological fabric that contains software, computers, and communication networks as essential components. Unfortunately, our ability to build affordable software systems for which there exists compelling evidence that the systems delivers their services in a manner that satisfies certain critical properties has not kept pace with the importa...