Browsing by Author "Quayson, Ebenezer"

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    Enhancing Digital Forensic Model Using Desktop Virtualization
    (MAY 2016) Quayson, Ebenezer
    The internet and advanced technologies have been used as tools by criminals these days to perpetrate diverse forms of crime and the digital world is exploited to facilitate crimes which are mostly technology driven. The evidence of such crimes which are technologically driven are in digital form hence the need to employ techniques, procedures, and methodologies that are technology inclined to reconstruct events and uncover evidence that are admissible in court. Digital forensics therefore provides the investigative techniques, scientifically derived and proven methods for preserving, collecting, validating, identifying, analyzing, interpreting and presenting admissible digital evidence derived from digital source(s). The development of several forensics investigation models by digital forensic researchers are designed to provide a well-tailored, accurate and efficient means of acquiring, authenticating and analyzing digital evidence while ensuring the integrity and sanctity of the evidence to make it admissible in court of law. However, these models are not without some inherent shortfalls whilst majority of them seems not to cater for investigation processes or activities done on the virtual environment. Virtualization is a proven software technology that is rapidly transforming the hosting landscape and fundamentally changing the way that businesses compute. In this research, some digital forensic process models were reviewed, digital forensic investigative platform setup up on a virtual desktop environment to allow digital forensics investigations to be conducted on the virtual environment. The results of this implementations were recorded, analyzed and used to improve a digital forensic investigation process model.
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    Partial replacement of phenol in phenol-formaldehyde adhesive with tannin and cost performance of imported adhesives in local plywood industry
    (1997) Quayson, Ebenezer
    Tannin extracted from Acacia nilotica, a local plant species was used to prepare Tannin-Phenol-formaldehyde resin, a phenolic adhesive in which Phenol has been partially substituted. The bonding strength of the adhesive was compared with Urea-Formaldehyde (UF) and Phenol- Formaldehyde (PF) which are currently being imported for commercial production of plywood locally at very high cost. The objective of this study is to promote the industrial production of T.P.F. to replace PF resin in the manufacture of exterior grade plywood locally which is expected to be relatively cheaper. The current percentage cost of adhesive in local plywood manufacture and consumption level of adhesive were also assessed. The TPF resin formed hot pressed bond that was superior to UF and comparable to that of PF. The percentage cost of adhesive in local plywood manufacture was observed to have increased approximately from 51.7% in 1992 to 60.7% in 1994. The current consumption of resin was observed to be approximately 1605 tonnes costing about 6.6 billion Cedis for UF and 14.5 billion Cedis in the case of PF.