The Experts below are selected from a list of 112716 Experts worldwide ranked by ideXlab platform
Quan Yuan - One of the best experts on this subject based on the ideXlab platform.
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Evaluation on the Man-Machine-Environment System of University Library
Man–Machine–Environment System Engineering, 2020Co-Authors: Kunzhu Zhang, Xinpo Wei, Quan Yuan, Jingyi LiuAbstract:Based on the theory of man-Machine-Environment system, this study establishes a comfort evaluation framework for university libraries, which include three aspects: workspace Environment, physical Environment, and humanity Environment. Among these factors, physical Environment is divided into light, thermal, acoustic, and air dimensions. Referring to the relevant national standards, this study conducts a questionnaire survey for the library readership in the main libraries of Tsinghua University, so as to test the feasibility of the evaluation framework. The survey results are in good agreement with those obtained by the established system. Thus, the man-Machine-Environment system of university libraries can be examined through this framework, which can provide an important reference for the comfort improvement of libraries.
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Study of Man–Machine–Environment System Engineering on University Library Under Internet Condition
Man–Machine–Environment System Engineering, 2018Co-Authors: Kunzhu Zhang, Quan YuanAbstract:The library plays an important role in the education and research of higher education. An effective man–Machine–Environment system (MMES) can guarantee the full and efficient use of the library information resources by the teachers and students. Based on the ergonomics theory, this paper investigates the composition factors of the MMES of the university library and its interrelations, analyzes the typical man–Machine interface and the main humanistic function of the library in current Internet conditions, and discusses the optimization method of the MMES. The results show that in the network Environment, the man–Machine–Environment system of university library contains many virtual man–Machine interfaces and the man–Machine interaction factors. Internet-based applications are the characteristics of the current university library, and the university library in the network Environment should pay attention to man–Machine interaction interface construction and humanized self-service function promotion. The conclusions may provide some implications for network-based and human-oriented improvement of the university library.
Kunzhu Zhang - One of the best experts on this subject based on the ideXlab platform.
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Evaluation on the Man-Machine-Environment System of University Library
Man–Machine–Environment System Engineering, 2020Co-Authors: Kunzhu Zhang, Xinpo Wei, Quan Yuan, Jingyi LiuAbstract:Based on the theory of man-Machine-Environment system, this study establishes a comfort evaluation framework for university libraries, which include three aspects: workspace Environment, physical Environment, and humanity Environment. Among these factors, physical Environment is divided into light, thermal, acoustic, and air dimensions. Referring to the relevant national standards, this study conducts a questionnaire survey for the library readership in the main libraries of Tsinghua University, so as to test the feasibility of the evaluation framework. The survey results are in good agreement with those obtained by the established system. Thus, the man-Machine-Environment system of university libraries can be examined through this framework, which can provide an important reference for the comfort improvement of libraries.
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Evaluation on the Design of Man-Machine-Environment System of Interactive Experience Space in Library
Man-Machine-Environment System Engineering, 2018Co-Authors: Kunzhu Zhang, Liyan Tan, Yang LiuAbstract:In order to evaluate the design of man-Machine-Environment system of interactive experience space of Tsinghua University Library, this paper establishes an evaluation system based on user survey method and 13 classical principles of human factors. All the factors are divided into two categories: interface and non-interface. The Space arrangement, size layout, display design, and features of human–Machine interaction are examined to evaluate the comfort, convenience, accessibility, and visibility, and to find possible improvements. The established evaluation methods and analysis results may provide certain reference for the humanized enhancement of the interactive experience space of library.
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Study of Man–Machine–Environment System Engineering on University Library Under Internet Condition
Man–Machine–Environment System Engineering, 2018Co-Authors: Kunzhu Zhang, Quan YuanAbstract:The library plays an important role in the education and research of higher education. An effective man–Machine–Environment system (MMES) can guarantee the full and efficient use of the library information resources by the teachers and students. Based on the ergonomics theory, this paper investigates the composition factors of the MMES of the university library and its interrelations, analyzes the typical man–Machine interface and the main humanistic function of the library in current Internet conditions, and discusses the optimization method of the MMES. The results show that in the network Environment, the man–Machine–Environment system of university library contains many virtual man–Machine interfaces and the man–Machine interaction factors. Internet-based applications are the characteristics of the current university library, and the university library in the network Environment should pay attention to man–Machine interaction interface construction and humanized self-service function promotion. The conclusions may provide some implications for network-based and human-oriented improvement of the university library.
Remzi H Arpacidusseau - One of the best experts on this subject based on the ideXlab platform.
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geiger monitoring the buffer cache in a virtual Machine Environment
Architectural Support for Programming Languages and Operating Systems, 2006Co-Authors: Stephen Jones, Andrea C Arpacidusseau, Remzi H ArpacidusseauAbstract:Virtualization is increasingly being used to address server management and administration issues like flexible resource allocation, service isolation and workload migration. In a virtualized Environment, the virtual Machine monitor (VMM) is the primary resource manager and is an attractive target for implementing system features like scheduling, caching, and monitoring. However, the lackof runtime information within the VMM about guest operating systems, sometimes called the semantic gap, is a significant obstacle to efficiently implementing some kinds of services.In this paper we explore techniques that can be used by a VMM to passively infer useful information about a guest operating system's unified buffer cache and virtual memory system. We have created a prototype implementation of these techniques inside the Xen VMM called Geiger and show that it can accurately infer when pages are inserted into and evicted from a system's buffer cache. We explore several nuances involved in passively implementing eviction detection that have not previously been addressed, such as the importance of tracking disk block liveness, the effect of file system journaling, and the importance of accounting for the unified caches found in modern operating systems.Using case studies we show that the information provided by Geiger enables a VMM to implement useful VMM-level services. We implement a novel working set size estimator which allows the VMM to make more informed memory allocation decisions. We also show that a VMM can be used to drastically improve the hit rate in remote storage caches by using eviction-based cache placement without modifying the application or operating system storage interface. Both case studies hint at a future where inference techniques enable a broad new class of VMM-level functionality.
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antfarm tracking processes in a virtual Machine Environment
USENIX Annual Technical Conference, 2006Co-Authors: Stephen Jones, Andrea C Arpacidusseau, Remzi H ArpacidusseauAbstract:In a virtualized Environment, the VMM is the system's primary resource manager. Some services usually implemented at the OS layer, like I/O scheduling or certain kinds of security monitoring, are therefore more naturally implemented inside the VMM. Implementing such services at the VMM layer can be complicated by the lack of OS and application-level knowledge within a VMM. This paper describes techniques that can be used by a VMM to independently overcome part of the "semantic gap" separating it from the guest operating systems it supports. These techniques enable the VMM to track the existence and activities of operating system processes. Antfarm is an implementation of these techniques that works without detailed knowledge of a guest's internal architecture or implementation. An evaluation of Antfarm for two virtualization Environments and two operating systems shows that it can accurately infer process events while incurring only a small 2.5% runtime overhead in the worst case. To demonstrate the practical benefits of process information in a VMM we implement an anticipatory disk scheduler at the VMM level. This case study shows that significant disk throughput improvements are possible in a virtualized Environment by exploiting process information within a VMM.
Min-hui Kuo - One of the best experts on this subject based on the ideXlab platform.
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A predictive man-Machine Environment for training and evaluating control operators
Engineering Applications of Artificial Intelligence, 1992Co-Authors: Nicholas V. Findler, Congyun Luo, Min-hui KuoAbstract:Abstract After a brief discussion of decision support systems and the problems of Air Traffic Control (ATC), the design and implementation of a Predictive Man-Machine Environment (PMME) are described that can in general be used in the automatic training and evaluation of control operators, as well as serve as the basis of their routine planning and decision-making activity. PMME works with two connected workstations, one of which displays the essential features of the Current World and the other those of the Extrapolated World. The latter predicts the future consequences of the control operator's tentative decisions made in responding to the Current World. If the operator is satisfied with the consequences, he finalizes his decisions; otherwise, he modifies the tentative decision and, time permitting, goes through this cycle as many times as necessary. A simulated air traffic control Environment for the PMME has also been implemented and two sets of experiments in it performed with tasks of equal complexity—one with and the other without the extrapolation facility. A statistically significant improvement has been shown in the ATC operations that rely on the extrapolation facility. It can be said in general that the PMME increases the effectiveness and efficiency of human judgmental processes by extending their range, capabilities and speed.
Stephen Jones - One of the best experts on this subject based on the ideXlab platform.
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geiger monitoring the buffer cache in a virtual Machine Environment
Architectural Support for Programming Languages and Operating Systems, 2006Co-Authors: Stephen Jones, Andrea C Arpacidusseau, Remzi H ArpacidusseauAbstract:Virtualization is increasingly being used to address server management and administration issues like flexible resource allocation, service isolation and workload migration. In a virtualized Environment, the virtual Machine monitor (VMM) is the primary resource manager and is an attractive target for implementing system features like scheduling, caching, and monitoring. However, the lackof runtime information within the VMM about guest operating systems, sometimes called the semantic gap, is a significant obstacle to efficiently implementing some kinds of services.In this paper we explore techniques that can be used by a VMM to passively infer useful information about a guest operating system's unified buffer cache and virtual memory system. We have created a prototype implementation of these techniques inside the Xen VMM called Geiger and show that it can accurately infer when pages are inserted into and evicted from a system's buffer cache. We explore several nuances involved in passively implementing eviction detection that have not previously been addressed, such as the importance of tracking disk block liveness, the effect of file system journaling, and the importance of accounting for the unified caches found in modern operating systems.Using case studies we show that the information provided by Geiger enables a VMM to implement useful VMM-level services. We implement a novel working set size estimator which allows the VMM to make more informed memory allocation decisions. We also show that a VMM can be used to drastically improve the hit rate in remote storage caches by using eviction-based cache placement without modifying the application or operating system storage interface. Both case studies hint at a future where inference techniques enable a broad new class of VMM-level functionality.
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antfarm tracking processes in a virtual Machine Environment
USENIX Annual Technical Conference, 2006Co-Authors: Stephen Jones, Andrea C Arpacidusseau, Remzi H ArpacidusseauAbstract:In a virtualized Environment, the VMM is the system's primary resource manager. Some services usually implemented at the OS layer, like I/O scheduling or certain kinds of security monitoring, are therefore more naturally implemented inside the VMM. Implementing such services at the VMM layer can be complicated by the lack of OS and application-level knowledge within a VMM. This paper describes techniques that can be used by a VMM to independently overcome part of the "semantic gap" separating it from the guest operating systems it supports. These techniques enable the VMM to track the existence and activities of operating system processes. Antfarm is an implementation of these techniques that works without detailed knowledge of a guest's internal architecture or implementation. An evaluation of Antfarm for two virtualization Environments and two operating systems shows that it can accurately infer process events while incurring only a small 2.5% runtime overhead in the worst case. To demonstrate the practical benefits of process information in a VMM we implement an anticipatory disk scheduler at the VMM level. This case study shows that significant disk throughput improvements are possible in a virtualized Environment by exploiting process information within a VMM.