Love Poem

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Factors Affecting One-Way Hashing of CD-R Media

While conducting a validation study of proficiency test media we found that applying the same hash algorithm against a single CD using different forensic applications resulted in different hash values. We formulated a series of experiments to determine the cause of the anomalous hash values. Our results suggest that certain write options cause forensic applications to report different hash values. We examine the possible consequences of these anomalies in legal proceedings and provide best practices for the use of hashing procedures

Predicting individual and team performance through personality traits, cohesion, and mental models

Includes bibliographical references (pages [246]-258).Previous research has examined the effects of personality on performance but has neglected the effects of individual traits on mental model development. The present study made predictions regarding personality traits (i.e., conscientiousness, agreeableness, extraversion, and emotional stability) and team cohesion (i.e., task and social) in the development of similar and accurate task and team mental models. Direct and indirect effects of these variables were further hypothesized to influence performance outcomes. Interactions were also predicted between personality traits at the individual and team levels and between the similarity and accuracy of mental models at the team level. Participants from classroom teams completed personality and cohesion measures that were examined at the individual and team levels. Similarity and accuracy of task and team mental models were assessed through concept ratings that were compared to teammates and professor ratings. Performance measures were based upon course grades and professor ratings. Data were analyzed through mediational and hierarchical regression using SPSS and structural equation modeling using LISREL. Several direct effects were found between personality traits, cohesion, mental model accuracy and similarity, and performance at individual and team levels. A specific mediation of task cohesion in the relationship between conscientiousness and individual professor ratings was found. At the team level, interactions were found between conscientiousness and emotional stability in predicting task mental models and between extraversion and agreeableness in predicting team mental models. Other team-level interactions were found between task mental model similarity and task mental model average accuracy and between task mental model professor accuracy and task mental model similarity in predicting individual grades. Individual-level interactions were also found between extraversion and emotional stability and between emotional stability and agreeableness in predicting individual professor ratings. The best-fitting LISREL indices were found for individual and team models that involved team performance. Team models that included both implicit and explicit mental models exhibited a slightly better fit for the implicit models. Both team and task models indicated the highest degree of fit over all variable models at the individual level.Ph.D. (Doctor of Philosophy

Analyzing the Impact of a Virtual Machine on a Host Machine

As virtualization becomes more prevalent in the enterprise and in personal computing, there is a great need to understand the technology as well as its ramifications for recovering digital evidence. This paper focuses on trace evidence related to the installation and execution of virtual machines (VMs) on a host machine. It provides useful information regarding the types and locations of files installed by VM applications, the processes created by running VMs and the structure and identity of VMs, ancillary files and associated artifacts

Forensic Analysis of the Sony Playstation Portable

The Sony PlayStation Portable (PSP) is a popular portable gaming device with features such as wireless Internet access and image, music and movie playback. As with most systems built around a processor and storage, the PSP can be used for purposes other than it was originally intended – legal as well as illegal. This paper discusses the features of the PSP browser and suggests best practices for extracting digital evidence

Peripheral quantitative computed tomography (pQCT) predicts humeral diaphysis torsional mechanical properties with good short-term precision.

Peripheral quantitative computed tomography (pQCT) is a popular tool for non-invasively estimating bone mechanical properties. Previous studies have demonstrated pQCT provides precise estimates that are good predictors of actual bone mechanical properties at popular distal imaging sites (tibia and radius). The predictive ability and precision of pQCT at more proximal sites remains unknown. The aim of the current study was to explore the predictive ability and short-term precision of pQCT estimates of mechanical properties of the midshaft humerus, a site gaining popularity for exploring the skeletal benefits of exercise. Predictive ability was determined ex vivo by assessing the ability of pQCT-derived estimates of torsional mechanical properties in cadaver humeri (density-weighted polar moment of inertia [IP] and polar Strength Strain Index [SSIP]) to predict actual torsional properties. Short-term precision was assessed in vivo by performing six repeat pQCT scans at the level of the midshaft humerus in 30 young, healthy individuals (degrees of freedom = 150), with repeat scans performed by the same and different testers and on the same and different days to explore the influences of different testers and time between repeat scans on precision errors. IP and SSIP both independently predicted at least 90% of the variance in ex vivo midshaft humerus mechanical properties in cadaveric bones. Overall values for relative precision error (root mean squared coefficients of variation) for in vivo measures of IP and SSIP at the midshaft humerus were less than 1.5% and were not influenced by pQCT assessments being performed by different testers or on different days. These data indicate that pQCT provides very good prediction of midshaft humerus mechanical properties with good short-term precision, with measures being robust against the influences of different testers and time between repeat scans

Fluid lavage in patients with open fracture wounds (FLOW): an international survey of 984 surgeons

<p>Abstract</p> <p>Background</p> <p>Although surgeons acknowledge the importance of irrigating open fracture wounds, the choice of irrigating fluid and delivery pressure remains controversial. Our objective was to clarify current opinion with regard to the irrigation of open fracture wounds.</p> <p>Methods</p> <p>We used a cross-sectional survey and a sample-to-redundancy strategy to examine surgeons' preferences in the initial management of open fracture wounds. We mailed this survey to members of the Canadian Orthopaedic Association and delivered it to attendees of an international fracture course (AO, Davos, Switzerland).</p> <p>Results</p> <p>Of the 1,764 surgeons who received the questionnaire, 984 (55.8%) responded. In the management of open wounds, the majority of surgeons surveyed, 676 (70.5%), favoured normal saline alone. Bacitracin solution was used routinely by only 161 surgeons (16.8%). The majority of surgeons, 695 (71%) used low pressures when delivering the irrigating solution to the wound. There was, however considerable variation in what pressures constituted high versus low pressure lavage. The overwhelming majority of surgeons, 889 (94.2%), reported they would change their practice if a large randomized controlled trial showed a clear benefit of an irrigating solution – especially if it was different from the solution they used.</p> <p>Conclusion</p> <p>The majority of surgeons favour both normal saline and low pressure lavage for the initial management of open fracture wounds. However, opinions varied as regards the comparative efficacy of different solutions, the use of additives and high versus low pressure. Surgeons have expressed considerable support for a trial evaluating both irrigating solutions and pressures.</p

The kinetics of cumene hydroperoxide decompisition as catalyzed by acid ion exchange resin

http://deepblue.lib.umich.edu/bitstream/2027.42/6459/5/bac8021.0001.001.pdfhttp://deepblue.lib.umich.edu/bitstream/2027.42/6459/4/bac8021.0001.001.tx