As an innovative software application mode,Software as a service(SaaS) shows many attractive advantages.Migrating legacy system to SaaS can make outdated systems revived.In the process of migration,the existing valuab...As an innovative software application mode,Software as a service(SaaS) shows many attractive advantages.Migrating legacy system to SaaS can make outdated systems revived.In the process of migration,the existing valuable components need to be discovered and reused in order that the target system could be developed/integrated more efficiently.An innovative approach is proposed in this paper to extract the reusable components from legacy systems.Firstly,implementation models of legacy system are recovered through reverse engineering.Secondly,function models are derived by vertical clustering,and then logical components are discovered by horizontal clustering based on the function models.Finally,the reusable components with specific feature descriptions are extracted.Through experimental verification,the approach is considered to be efficient in reusable component discovery and to be helpful to migrating legacy system to SaaS.展开更多
Heroin is considered potent and addictive and users are often stigmatised as the other. On the internet, however, hegemonic ideas about drugs can be resisted. This study elucidates how efforts to uormalise and demonis...Heroin is considered potent and addictive and users are often stigmatised as the other. On the internet, however, hegemonic ideas about drugs can be resisted. This study elucidates how efforts to uormalise and demonise heroin meet at a Swedish online message board （Flashback Forum）. The study aims at analysing how heroin use is given meaning by discussants in a thread called ＂I will start with heroin＂. The data were perceived and structured as a collaborative, overarching narrative about when, why, and for whom heroin use can make sense. Discussants used stories about pleasure-seekers, miserable junkies, and self-medicating addicts to depict the activity as unproblematic and rational, problematic and irrational, or as problematic and rational. No stories about heroin use departed from the plot-lines of pleasure maximisation and pain minimisation. Results elucidate a discursive battle in which： （1） heroin use as minimisation of pain ＂wins＂ over heroin use as maximisation of pleasure; and （2） there is a general agreement that heroin use cannot be irrational and unproblematic at the same time. It is suggested that these features are central to contemporary drug discourse, and that they probably hinder public understanding of why people use heroin and therefore contribute to keep users stigmatised.展开更多
基金supported by National Natural Science Foundation of China(No.61262082,No.61462066)Key Project of Chinese Ministry of Education(No.212025)+1 种基金Inner Mongolia Science Foundation for Distinguished Young Scholars(No.2012JQ03)Inner Mongolia Natural Science Foundation of Inner Mongolia(No.2012MS0922)
文摘As an innovative software application mode,Software as a service(SaaS) shows many attractive advantages.Migrating legacy system to SaaS can make outdated systems revived.In the process of migration,the existing valuable components need to be discovered and reused in order that the target system could be developed/integrated more efficiently.An innovative approach is proposed in this paper to extract the reusable components from legacy systems.Firstly,implementation models of legacy system are recovered through reverse engineering.Secondly,function models are derived by vertical clustering,and then logical components are discovered by horizontal clustering based on the function models.Finally,the reusable components with specific feature descriptions are extracted.Through experimental verification,the approach is considered to be efficient in reusable component discovery and to be helpful to migrating legacy system to SaaS.
文摘Heroin is considered potent and addictive and users are often stigmatised as the other. On the internet, however, hegemonic ideas about drugs can be resisted. This study elucidates how efforts to uormalise and demonise heroin meet at a Swedish online message board （Flashback Forum）. The study aims at analysing how heroin use is given meaning by discussants in a thread called ＂I will start with heroin＂. The data were perceived and structured as a collaborative, overarching narrative about when, why, and for whom heroin use can make sense. Discussants used stories about pleasure-seekers, miserable junkies, and self-medicating addicts to depict the activity as unproblematic and rational, problematic and irrational, or as problematic and rational. No stories about heroin use departed from the plot-lines of pleasure maximisation and pain minimisation. Results elucidate a discursive battle in which： （1） heroin use as minimisation of pain ＂wins＂ over heroin use as maximisation of pleasure; and （2） there is a general agreement that heroin use cannot be irrational and unproblematic at the same time. It is suggested that these features are central to contemporary drug discourse, and that they probably hinder public understanding of why people use heroin and therefore contribute to keep users stigmatised.
