ACM Trans. Manag. Inf. Syst.最新文献_第10页

The sustainability of corporate wikis: A time-series analysis of activity patterns 企业wiki的可持续性:活动模式的时间序列分析

ACM Trans. Manag. Inf. Syst. Pub Date : 2009-12-01 DOI: 10.1145/1877725.1877731

Ofer Arazy, A. Croitoru

{"title":"The sustainability of corporate wikis: A time-series analysis of activity patterns","authors":"Ofer Arazy, A. Croitoru","doi":"10.1145/1877725.1877731","DOIUrl":"https://doi.org/10.1145/1877725.1877731","url":null,"abstract":"While existing theoretical frameworks describe collective technology adoption patterns, they provide little insight regarding the expected patterns of wiki activity within projects. Another impediment to the study of wiki sustainability is the absence of time-series analysis methods that are suitable for the unique patterns of wiki activity logs. The primary goals of this study are to: (i) develop a novel method for analyzing wiki edit activity logs, (ii) reveal the temporal patterns of corporate wiki edit activity, and (iii) study the factors impacting wikis' sustainability. A validation of our proposed method demonstrates that it is superior to the baseline algorithm in the face of noisy data. Our empirical study combines wiki system edit activity logs with a survey of users' perceptions, and explores 33277 distinct wiki applications within one global organization over the first 5 years of wiki operation. Our results reveal six different prototypical wiki activity patterns, and show that most corporate wikis become inactive after a relatively short period. Findings from the user survey show that users of sustainable wikis are more satisfied with the wiki system and its contents, and feel that the wiki provides them with a sense of community and productivity enhancements.","PeriodicalId":178565,"journal":{"name":"ACM Trans. Manag. Inf. Syst.","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131698189","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 21

Modeling dynamics in agile software development 敏捷软件开发中的动态建模

ACM Trans. Manag. Inf. Syst. Pub Date : 2004-10-23 DOI: 10.1145/1877725.1877730

Lan Cao, B. Ramesh, T. Abdel-Hamid

{"title":"Modeling dynamics in agile software development","authors":"Lan Cao, B. Ramesh, T. Abdel-Hamid","doi":"10.1145/1877725.1877730","DOIUrl":"https://doi.org/10.1145/1877725.1877730","url":null,"abstract":"Changes in the business environment such as turbulent market forces, rapidly evolving system requirements, and advances in technology demand agility in the development of software systems. Though agile approaches have received wide attention, empirical research that evaluates their effectiveness and appropriateness is scarce. Further, research to-date has investigated individual practices in isolation rather than as an integrated system. Addressing these concerns, we develop a system dynamics simulation model that considers the complex interdependencies among the variety of practices used in agile development. The model is developed on the basis of an extensive review of the literature as well as quantitative and qualitative data collected from real projects in nine organizations. We present the structure of the model focusing on essential agile practices. The validity of the model is established based on extensive structural and behavioral validation tests. Insights gained from experimentation with the model answer important questions faced by development teams in implementing two unique practices used in agile development. The results suggest that due to refactoring, the cost of implementing changes to a system varies cyclically and increases during later phases of development. Delays in refactoring also increase costs and decrease development productivity. Also, the simulation shows that pair programming helps complete more tasks and at a lower cost. The systems dynamics model developed in this research can be used as a tool by IS organizations to understand and analyze the impacts of various agile development practices and project management strategies.","PeriodicalId":178565,"journal":{"name":"ACM Trans. Manag. Inf. Syst.","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125477464","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 64

Fast, Scalable, and Context-Sensitive Detection of Trending Topics in Microblog Post Streams 快速、可扩展、上下文敏感的微博帖子流趋势话题检测

ACM Trans. Manag. Inf. Syst. Pub Date : 1900-01-01 DOI: 10.1145/2407740.2407743

N. Pervin, Fang Fang, Anindya Datta, K. Dutta, Debra E. VanderMeer

引用次数: 34

Business Intelligence and Analytics: Research Directions 商业智能与分析:研究方向

ACM Trans. Manag. Inf. Syst. Pub Date : 1900-01-01 DOI: 10.1145/2407740.2407741

Ee-Peng Lim, Hsinchun Chen, Guoqing Chen

引用次数: 6

Product Comparison Networks for Competitive Analysis of Online Word-of-Mouth 在线口碑竞争分析的产品比较网络

ACM Trans. Manag. Inf. Syst. Pub Date : 1900-01-01 DOI: 10.1145/2407740.2407744

Zhu Zhang, Chenhui Guo, Paulo B. Góes

引用次数: 73

Automated Feature Selection for Anomaly Detection in Network Traffic Data 网络流量数据异常检测的自动特征选择

ACM Trans. Manag. Inf. Syst. Pub Date : 1900-01-01 DOI: 10.1145/3446636

Makiya Nakashima, A. Sim, Youngsoo Kim, Jong-Hoi Kim, Jinoh Kim

{"title":"Automated Feature Selection for Anomaly Detection in Network Traffic Data","authors":"Makiya Nakashima, A. Sim, Youngsoo Kim, Jong-Hoi Kim, Jinoh Kim","doi":"10.1145/3446636","DOIUrl":"https://doi.org/10.1145/3446636","url":null,"abstract":"\u0000 Variable selection (also known as\u0000 feature selection\u0000 ) is essential to optimize the learning complexity by prioritizing features, particularly for a massive, high-dimensional dataset like network traffic data. In reality, however, it is not an easy task to effectively perform the feature selection despite the availability of the existing selection techniques. From our initial experiments, we observed that the existing selection techniques produce different sets of features even under the same condition (e.g., a static size for the resulted set). In addition, individual selection techniques perform inconsistently, sometimes showing better performance but sometimes worse than others, thereby simply relying on one of them would be risky for building models using the selected features. More critically, it is demanding to automate the selection process, since it requires laborious efforts with intensive analysis by a group of experts otherwise. In this article, we explore challenges in the automated feature selection with the application of network anomaly detection. We first present our ensemble approach that benefits from the existing feature selection techniques by incorporating them, and one of the proposed ensemble techniques based on greedy search works highly consistently showing comparable results to the existing techniques. We also address the problem of when to stop to finalize the feature elimination process and present a set of methods designed to determine the number of features for the reduced feature set. Our experimental results conducted with two recent network datasets show that the identified feature sets by the presented ensemble and stopping methods consistently yield comparable performance with a smaller number of features to conventional selection techniques.\u0000","PeriodicalId":178565,"journal":{"name":"ACM Trans. Manag. Inf. Syst.","volume":"62 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125515526","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 10