Robert M W Ferguson

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Any opinions, findings and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflect the views of the United States Department of Defense. INFRINGEMENT. This material has been approved for public release and unlimited distribution except as restricted below. Internal use:* Permission to reproduce(More)
The quality of software products depends on the quality of the requirements used to create them. Expressiveness (i.e., the ability to convey the intended meaning by avoiding ambiguities and readability problems) is an important quality characteristic of natural language requirements. This paper describes an empirical study that used data from an industrial(More)
R ecent military operations around the world demonstrate the superiority of U.S. weapon systems developed by the Department of Defense (DoD). Furthermore, an ever-increasing percentage of the weapon systems' functionality is provided by software, which constantly becomes more sophisticated and complex. While the DoD has risen to the challenge, cost overruns(More)
Most software systems have some " defects " that are identified by users. Some of these are truly defects in that the requirements were not properly implemented; some are caused by changes made to other systems; still others are requests for enhancement – improvements that would improve the users' experience. These " defects " are generally stored in a(More)
Requirements analysis is a nontrivial, tedious, error prone and time consuming process. This paper describes a tool that automates identification of requirements defects that exist because of inadequate use of language for the purpose intended. The paper also describes results of using the tool on actual requirements documents from different industries. Our(More)
This study investigated the effect of changes in organic loading rate (OLR) and feedstock on the volatile fatty acids (VFAs) production and their potential use as a bioengineering management tool to improve stability of anaerobic digesters. Digesters were exposed to one or two changes in OLR using the same or different co-substrates (Fat Oil and Grease(More)
In this study, the effects, fate and transport of ENPs in wastewater treatment plants (WWTP) were investigated using three parallel pilot WWTPs operated under identical conditions. The WWTPs were spiked with (i) an ENP mixture consisting of silver oxide, titanium dioxide and zinc oxide, and (ii) bulk metal salts. The third plant served as control(More)