Space-filling visualization techniques have proved their capability in visualizing large hierarchical structured data. However, most existing techniques restrict their partitioning process in vertical and horizontal d...
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It is challenging to optimize GPU kernels because this progress requires deep technical knowledge of the underlying hardware. Modern GPU architectures are becoming more and more diversified, which further exacerbates ...
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Service selection is a key step in the service composition process. The selection mainly depends on the search function of UDDI. However, UDDI provides poor search facilities: It allows only a keyword based search of ...
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Context: Research shows that one of the main reasons of project failure is changing requirements. The success or failure of software projects largely depends upon how we respond to changing requirements. The knowledge...
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ISBN:
(纸本)9781849195416
Context: Research shows that one of the main reasons of project failure is changing requirements. The success or failure of software projects largely depends upon how we respond to changing requirements. The knowledge about the causes of requirements change can improve our ability to make better decisions and manage changing requirements effectively. Objective: In this paper we present findings from an empirical study that was aimed at identifying the causes of requirement change and the frequency of these causes in different software development phases. Methods: We performed a systematic literature review and went through all the stages required by the process. Although our search strings yielded a large amount of papers but after careful filtration we were left with only five papers (six studies) which reported empirical knowledge about the causes of requirement change. Results: We have identified different causes and their frequency in software development phases. We have classified the extracted causes of requirements change into two major types i.e., essential and accidental causes. Conclusions: It is surprising to find little empirical evidence on the causes of requirements change as requirements change has been widely quoted as one of the major challenges faced by requirements engineers. With this small number of evidences, it is hard to generalize the research results. There is a need for further empirical research to identify and fully understand the causes of requirement change.
Replica is better than erasure coding when managing the redundancy of a storage system under high *** needs extra network communication to keep the target *** classifying the hosts into different categories of availab...
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Replica is better than erasure coding when managing the redundancy of a storage system under high *** needs extra network communication to keep the target *** classifying the hosts into different categories of availability and placing the data replicas carefully may reduce the maintenance *** a globe scale P2P system,the time-zoned multilayer Chord divides the hosts into 24 categories according to the time zone where they *** the hosts are belongs to a Main Chord which consisted of all the hosts and one Local Chord which consisted of the hosts located in the same time *** of the daily behavior of the people in same time zone are nearly similar,which means their computers are more likely to be available in the daytime and less likely to be available in the ***,for a certain time,there is nearly half of the hosts get higher availability than the other *** the hosts in the same time zone are considered,their availability evaluated by the system is shifting periodically in a 24 hours *** give a carefully placement of the data replicas on this two layered Chord,the less communication is needed to maintain the same target *** experiments show that dividing hosts by location of time zone might reduce the overhead of redundancy management.
This paper presents the results of a project on neural network-based data analysis for knowledge clustering in a second-year course on medical-surgical nursing. Data was collected from 208 nursing students which perfo...
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This paper presents the results of a project on neural network-based data analysis for knowledge clustering in a second-year course on medical-surgical nursing. Data was collected from 208 nursing students which performed one Multiple Choice Question (MCQ) test at the end of the first term. A total of 23 pattern groups were created using snap-drift. Data obtained can be integrated with an on-line MCQ system for training purposes. Findings about how students are classified suggest that the level of knowledge of the individuals can be addressed by customized feedback to guide them towards a greater understanding of particular concepts.
We apply topic modelling to automatically induce word senses of a target word, and demonstrate that our word sense induction method can be used to automatically detect words with emergent novel senses, as well as toke...
Probabilistic XML data is widely used in many web applications. Recent work has been mostly focused on structured query over probabilistic XML data. A few of work has been done about keyword query. However only the in...
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The main objective of the Service Level Management process is to ensure that an agreed level of IT service is provided for all current IT services and that future services are delivered to agreed achievable targets. T...
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The main objective of the Service Level Management process is to ensure that an agreed level of IT service is provided for all current IT services and that future services are delivered to agreed achievable targets. The number of agreed SLAs has rapidly increased in the IT industry while more and more IT customers have become aware of Service Level Management best practices. IT Infrastructure Library (ITIL) is the most widely used IT service management framework that provides best practices for implementing IT service management processes including Service Level Management. The research problem of this study is: how Service Level Agreements can be implemented with an IT service management tool. We use a combination of IT service management and knowledge management approach to study the problem. The main contribution of this paper is to present results of a case study that focused on improving Service Level Management practices in a Finnish IT service provider company Tieto.
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