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Virtualization
Published in Kirk Hausman, Sustainable Enterprise Architecture, 2011
Virtual appliances and PC-hosted virtual machines can also allow a single workstation to provide access to multiple computing platforms simultaneously. The popular Apple Macintosh system includes the Parallels virtualization environment, allowing native Windows functionality within a virtual PC hypervisor. Newer forms of Microsoft’s Windows platform include the Windows on Windows (WoW) virtual hypervisor for backwards compatibility in legacy applications. Use of a PC hypervisor such as the popular VMWare service can allow a single workstation to support as many different virtualized desktop configurations as system resources allow, together with options for capturing point-in-time snapshots for automatic rollback during testing and development. This can greatly reduce design time by eliminating the need to completely reload a test system each time a setting or application function is altered and by providing developers with multiple versions of operating systems, brows-ers, and application software suites with which to test the new application under development, without the need for individual physical hardware systems for each.
Hip biomechanical alterations during walking in chronic ankle instability patients: a cross-correlation analysis
Published in Sports Biomechanics, 2022
Alexandra F. DeJong, Rachel M. Koldenhoven, Jay Hertel
USI data processing followed the same procedures that have been described in previous studies, in which ground reaction force data referenced on the Motion Monitor computer monitor was used to identify initial contact timing (20-Newton threshold) for the USI videos (DeJong et al., 2019; DeJong et al., 2019b). The middle five strides of the USI videos were used to assess each participant’s gluteal muscle thickness data. The video clips were reduced to 11 still image frames per gait cycle using the Macintosh screenshot function (macOS High Sierra, Version 10.13.6, Apple Inc.©). Each image represented 10% intervals from 0–100% of each recorded gait cycle, resulting in 55 image frames per participant video, and 165 images per participant. Muscle thickness measures for both the gluteus maximus and gluteus medius were obtained through ImageJ software (ImageJ 1.50i, National Institutes of Health, USA) by measuring the distance in centimetres from the inferior to superior fascial borders of each muscle (DeJong et al., 2019; DeJong, Koldenhoven, Hart, et al., 2020; DeJong, Koldenhoven, & Hertel, 2020b). Muscle thickness measures during walking were normalised to the quiet standing muscle measurements (DeJong et al., 2019; Dieterich et al., 2014; DeJong et al., 2019b). Normalised USI muscle thickness measures were then interpolated between the 10% intervals to generate 101 data points to prepare for cross-correlation analyses between USI and the kinematic, kinetic, and sEMG data (DeJong, Koldenhoven, & Hertel, 2020b).
Trends in passenger exposure to carbon monoxide inside a vehicle on an arterial highway of the San Francisco Peninsula over 30 years: A longitudinal study
Published in Journal of the Air & Waste Management Association, 2019
Each field survey took advantage of technical advances made in personal exposure monitors and data logging systems over the course of the study. During Survey #1 (1980–1981), CO concentrations were measured using a General Electric CO “detector” (model 15ECS3CO1). Several early trips during this period used a high-time resolution ECOlyzer 9000 “dosimeter” made by Energetics Science, Inc. Data from both instruments were recorded on an Esterline-Angus “Miniservo” strip-chart recorder. The strip-chart data were later digitized manually at 12-sec intervals. During Survey #2 (1991–1992), the Langan L15 and Draeger 190 electrochemical CO monitors—each with internal data loggers—were used. The stored data from the Langan monitor were transferred by cable to a Macintosh personal computer using Sense-Your-World software supplied by the manufacturer. The Draeger monitor required an interface adapter attached to an IBM personal computer. Measuring low CO concentrations during Survey #3 (2001–2002) and Survey #4 (2010–2011) required two Langan T15n Enhanced CO Measurers with internal DataBear loggers (Langan Products, San Francisco, CA). The sampling rates of the instruments were set for once every 2 sec during Survey #2, once every 12 sec during Survey #3, and once every 10 sec during Survey #4. The Langan monitor uses an internal HOBO data logger (Onset Corp., Bourne, MA). The data were downloaded after each trip into spreadsheet files on a Mac personal computer for further analysis.
Is my AV crashing? An online photo-based experiment assessing whether shared intended pathway can help AV drivers anticipate silent failures
Published in Ergonomics, 2023
Ritwik Swain, Sherrie-Anne Kaye, Andry Rakotonirainy
Participants were recruited via word of mouth, social media posts (paid and unpaid), email lists, and the QUT SONA2 system. Participants were offered the chance to enter a prize draw to win one of three x $100 shopping vouchers. First year QUT psychology undergraduate students recruited via the SONA system had the option of receiving 0.5 partial course credit points or entry into the prize draw. Participants were required to live in Australia and hold a valid driving licence (Australian or overseas driving licence). The study received 586 responses of which 495 participants completed the online experiment. Forty-nine participants were excluded because they did not hold a valid licence and 47 participants were excluded as they reported that they held a learner’s permit. A total of 52 participants were removed as they had incorrectly or did not answer the verification questions. After exclusions, there were 394 participants. All participants reported being residents of Australia and their ages ranged from 17 to 85 years (M = 28.24 years, SD = 14.79). Two hundred and fifty-three participants were female, 136 male, and five other/non-binary. Most participants held an open/unrestricted Australian driver’s licence (n = 207), 57 held a provisional3 1 driver’s licence, 123 held a provisional 2 driver’s licence, and six participants reported holding an international driver’s licence. Most participants (n = 355) reported residing in Queensland, Australia. In terms of device used to complete the experiment, 89.3% of participants completed the online experiment via a personal computer (either Chrome, Windows, or Macintosh Operating Systems), 7.1% of participants completed the online experiment using a phone, and 3.6% of participants completed the experiment using an iPad.