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Prevention from Cyberattacks
Published in Kutub Thakur, Al-Sakib Khan Pathan, Cybersecurity Fundamentals, 2020
Kutub Thakur, Al-Sakib Khan Pathan
Mac computers are brand names of Apple Inc. Mac computer runs on operating systems called OS X and macOS. The Apple computers’ operating system evolved from its OS X 10 beta release in 2000. From there on, the OS X 10 releases continued till OS X 10.11 commonly known as El Capitan (Gala), which was released in the month of September, 2015.
Vehicle-ride sensation sharing system with stereoscopic 3D visual perception and vibro-vestibular feedback for immersive remote collaboration
Published in Advanced Robotics, 2022
Vibol Yem, Reon Nashiki, Tsubasa Morita, Yasushi Ikei
To provide vibration and acceleration sensation to the whole body, we modified the wheelchair by attaching two DC motors, enabling the motion simulator to be low-cost and lightweight. The frequency response results in Figure 4 showed that the modified wheelchair could provide acceleration at the armrest with the amplitude of over 4 G when the frequency was at 10 Hz, hence providing sufficient vibration sensation to the users. Although our algorithm makes the wheelchair move in a limited space, mounting the wheelchair with sensors to detect the obstacles is required for safety hazards. In our prototype system, we used two Mac Pro PCs for live video transmission because it was compatible with the 360-degree cameras made by Ricoh Company. However, laptop PCs made the vehicle system look large and unsuitable for practical use. Currently, Ricoh issued the SDK that allowed the Linux PC to control the camera via C/C++ programming. Therefore, we started using a Jetson Xavier NX, a small-embedded PC manufactured by NVIDIA Corp., for live video transmission, allowing this setup to make our current vehicle system more compact and suitable for practice.
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.
Fast Computation of Exact G-Optimal Designs Via Iλ-Optimality
Published in Technometrics, 2018
Lucia N. Hernandez, Christopher J. Nachtsheim
It is worth mentioning that these designs were constructed using 200 random starts in 20.13 and 25.07 hr, respectively, on a Mac Pro 2.7 GHz computer. This translates to roughly 6.0 and 7.5 min per random start. We attempted to construct designs for these problems using G-CEXCH as well, but computational times would have been simply prohibitive. For instance, for four factors with 17 runs, the G-CEXCH algorithm performed 1.6 · 107 function evaluations with only one random start. This took 3 hr using the computer already mentioned. Since we required 200 random starts for both G-CEXCH and G(Iλ)-CEXCH, it would take about 25 days to obtain the final design. For five factors with 23 runs, one random start of the G-CEXCH algorithm required 8 · 107 function evaluations and about 20 hr; 200 random starts would have required about 166 days.