Alan Gene Holt
Research interests
-
InterestsWireless Mesh Networks, World Wide Web, Internet, Grid Computing, Wireless Computing (Mobile Computing), Computational Mathematics, 802.11, Network performance.
Publications
-
0.75Impact points
Performance analysis of mobile agents
Communications, IET. 07/2007;
The results of a performance analysis of mobile agents in a distributed network environment are presented. Analytical models are developed and used to compare the performance of carrying out a simple management function with mobile agents (MA) or SNMP (simple network management protocol). An examina... [more] The results of a performance analysis of mobile agents in a distributed network environment are presented. Analytical models are developed and used to compare the performance of carrying out a simple management function with mobile agents (MA) or SNMP (simple network management protocol). An examination is made of how delay is affected by the size of the management domain and how each method behaves in both a local area network (LAN) and wide area network (WAN) environment. For large domains, optimal performance is obtained if the mobile agents' size is bounded, and this may require sharing the management task among a small number of mobile agents
-
An integrated manufacturing network management framework by using mobile agent
The International Journal of Advanced Manufacturing Technology. 01/2007; 32:822.
The growth in the development of distributed manufacturing systems necessitates increases in efficient technologies in order to facilitate management of the networked resources. Systems such as manufacturing automation protocol (MAP) already exist which were specifically designed for managing networ... [more] The growth in the development of distributed manufacturing systems necessitates increases in efficient technologies in order to facilitate management of the networked resources. Systems such as manufacturing automation protocol (MAP) already exist which were specifically designed for managing networked manufacturing devices. However, MAP has been criticised for being over-complex and expensive for small–medium sized enterprises. The simple network management protocol (SNMP) was designed for managing TCP/IP networks, and we argue that it can also be used for managing networked manufacturing devices. However, SNMP, like MAP, is based upon a client/server architecture, and both have scalability issues. We also investigate the use of mobile agent (MA) technology as a means of managing a domain of manufacturing devices. An integrated network management framework based on MA technology is developed to direct the research into the investigation of aligning network management paradigm to the strategic management decision.
-
0.97Impact points
World-Wide Web mirrors: likelihood of stale content
Electronics Letters. 02/2006;
Mirroring is common practice for popular sites. Geographically distributed mirrors help to load-balance network traffic. Furthermore, content downloads are faster for users accessing a nearby mirror. Users, however, may value up-to-date content over performance and network optimality, so it is impor... [more] Mirroring is common practice for popular sites. Geographically distributed mirrors help to load-balance network traffic. Furthermore, content downloads are faster for users accessing a nearby mirror. Users, however, may value up-to-date content over performance and network optimality, so it is important to ensure that revisions are propagated to mirrors regularly. Triggered or frequently scheduled updates can place heavy loads on the network. Furthermore, content providers may wish to schedule mirror updates during off-peak times in order to take advantage of less than best effort services. The trade-off between update frequencies of mirror sites and the likelihood of stale content is explored
-
0.32Impact points
Theoretical performance analysis of mirroring World Wide Web sites
Communications, IEE Proceedings-. 09/2003;
Popular World Wide Web sites can often cause congestion hot spots in the network, resulting in degradation of performance. Typically, such sites are mirrored in order to alleviate bottlenecks. This presents users of these sites with a choice of where to access their documents. Using a theoretical We... [more] Popular World Wide Web sites can often cause congestion hot spots in the network, resulting in degradation of performance. Typically, such sites are mirrored in order to alleviate bottlenecks. This presents users of these sites with a choice of where to access their documents. Using a theoretical Web access delay model, a performance analysis is carried out which shows the effects of mirror location and communication facility speed. The analysis shows the conflict of interest between the network operator trying to optimise aggregate data rates and that of the users trying to maximise their own individual data rates. The results reflect upon the load balancing policies for optimal network performance.
-
0.32Impact points
Long-range dependence and self-similarity in World Wide Web proxy cache references
Communications, IEE Proceedings-. 01/2001;
The existence of long-range dependence and self-similarity properties within World Wide Web proxy cache references is reported. Fractional ARIMA processes are used to generate long-range dependent cache hit/miss sequences in order to model the growth in cache occupancy. This model was compared to a ... [more] The existence of long-range dependence and self-similarity properties within World Wide Web proxy cache references is reported. Fractional ARIMA processes are used to generate long-range dependent cache hit/miss sequences in order to model the growth in cache occupancy. This model was compared to a model using independent cache hit/miss sequences and it was found that the results predicted by these models differed significantly. However, the results of the fractional ARIMA model resembled the growth of an actual cache. Trace simulations were carried out in order to investigate the effects of long-range dependence and self-similarity on cache replacement and garbage collection policies
-
Prisoners, chickens, volunteers, free riders and suckers: dilemmas on the Internet
IEE Engineering, Science and Education Journal. 01/1997; 6:73.
The World Wide Web enables users to access a variety of multimedia resources distributed around the world. Its ease of use has attracted many new users to the Internet and the emergence of commercial Internet providers has facilitated this growth. Although most people welcome the breakdown of elitis... [more] The World Wide Web enables users to access a variety of multimedia resources distributed around the world. Its ease of use has attracted many new users to the Internet and the emergence of commercial Internet providers has facilitated this growth. Although most people welcome the breakdown of elitist access to the Internet, it has had an impact on the performance experienced by the individual user. `Game theory' is used to examine the conflict of self interest versus group interest within a shared network environment like the Internet
-
Do disk drives dream of buffer cache hits?
ACM Proceedings of the conference on Ethics in the computer age, Galtinburg Tennessee USA; 01/1994
G.E. Moore, in his book Principia Ethica, examines the popular view of ethics that deals with “what we ought to do” as well as using ethics to cover the general inquiry: “what is good?”This paper utilises Moore's view of Ethics to examine computer systems performance. Moore asserts that “good” i... [more] G.E. Moore, in his book Principia Ethica, examines the popular view of ethics that deals with “what we ought to do” as well as using ethics to cover the general inquiry: “what is good?”This paper utilises Moore's view of Ethics to examine computer systems performance. Moore asserts that “good” in itself is indefinable. It is argued in this report that, although we describe computer systems as good (or bad) a computer system cannot be good in itself, rather a means to good!In terms of “what we ought to do” this paper looks at what actions (would) bring about good computer system performance according to computer science and engineering literature. In particular we look at duties, responsibilities and “to do what is right” in terms of system administration, design and usage.We further argue that in order to first make ethical observations with respect computer system performance and then apply them, requires technical knowledge which is typically limited to industry specialists and experts.
-
Monitoring large management domains with mobile agents
In this paper, we consider the use of Mobile Agent (MA) technology for managing large domains of networked devices. We present a performance analysis of mobile agents in a distributed network environment. In particular we consider both reliable (such as wired Ethernet networks) and an unreliable net... [more] In this paper, we consider the use of Mobile Agent (MA) technology for managing large domains of networked devices. We present a performance analysis of mobile agents in a distributed network environment. In particular we consider both reliable (such as wired Ethernet networks) and an unreliable network environments (such as wireless networks). The performance of MAs directly affects their ability to monitor the management domain. Measurement readings of the domain state are only useful if they can be collected and delivered to management stations in a timely manner. In this paper, MA performance is analysed as a function domain size. Moreover, methods for improving MA performance in large domains are investigated.
-
The application of dependency management in an integrated manufacturing network framework
Research into the effectiveness and performance of the mobile agent (MA)technology as a means of managing a domain of manufacturing devices has been conducted. However, it has been shown that MAs are not without their scalability issues. A strategic agent travelling algorithm will bring performance ... [more] Research into the effectiveness and performance of the mobile agent (MA)technology as a means of managing a domain of manufacturing devices has been conducted. However, it has been shown that MAs are not without their scalability issues. A strategic agent travelling algorithm will bring performance improvement as it allows agents to identify the best migration path in order to minimise the total expected time of searching for the desired information. The applications of process-driven dependency management along with MA techology are examined as methods for optimising the effiency of retrieving critical information in the manufacturing environment. An integrated framework is developed to investigate the alignment of network management paradigm to the strategic management decision.
Following (2)
-
Sumit Singh
Vellore Institute of Technology -
Dr. jyoti Chaudhary
high performance computing research lab
Topics (5)
