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Introduction to Computer Based Manufacturing Systems
Published in John Gaylord, Factory Information Systems, 2020
Today the most cost effective drafting systems are implemented using time-sharing. Time-sharing permits many user terminals to be operated from a single computer. This is possible because there are significant intervals when a draftsman or designer is not actively using computer resources. These unused resource intervals may be shared by queueing up computing tasks from many users thus improving system utilization. If too many terminals are used, the responsiveness of the system decreases. Each user must wait for the computer to process the tasks in the queue before it can respond to a request. About 3 seconds is the human tolerance limit for waiting. Multiple time-sharing workstations connected to a minicomputer are shown in Figure 1.7.
Information Technologies of Randomized Machine Learning
Published in Yuri S. Popkov, Alexey Yu. Popkov, Yuri A. Dubnov, Alexander Yu. Mazurov, Entropy Randomization in Machine Learning, 2023
Yuri S. Popkov, Alexey Yu. Popkov, Yuri A. Dubnov, Alexander Yu. Mazurov
Note that multitasking can be implemented with a single computing device, e.g., based on time sharing: an operating system executes each process during a fixed period of time, then suspends it and switches to another process. Clearly, this approach gives no real increase in performance, and the advantages of parallelism are not gained.
Dynamic Resource Allocation Using Improved Firefly Optimization Algorithm in Cloud Environment
Published in Applied Artificial Intelligence, 2022
Simin Abedi, Mostafa Ghobaei-Arani, Ehsan Khorami, Musa Mojarad
Cloud computing is a general term for anything that includes the provision of internet-hosted services (Naha et al. 2020). For example, such as digital marketing and e-mail marketing (Pawar and Wagh 2012). In addition, cloud computing can be introduced as providing computer services such as storage, database, software, networking and analytics that provide more flexible resources (Rezaeipanah, Mojarad, and Fakhari 2022). In this technology, the user does not have access to technical details and only sees its appearance (Liu et al. 2022). The logic behind cloud computing is time sharing. In other words, different computer resources are shared between multiple users using multi-programming and multi-tasking mechanisms. This approach was first used in the 1950s (Berahmand et al. 2021). At this time, several users shared its services with access to a central computer, because of the high price and large size of central computers, it was not possible to provide an independent system for each user. Thus, cloud services can be considered as a way to share computers in the 1950s (Wang et al. 2015).