ACM Trans. Manag. Inf. Syst.最新文献_第2页

High-Resolution Spatio-Temporal Model for County-Level COVID-19 Activity in the U.S 美国县级COVID-19活动的高分辨率时空模型

ACM Trans. Manag. Inf. Syst. Pub Date : 2020-09-15 DOI: 10.1145/3468876

Shixiang Zhu, Alexander W. Bukharin, Liyan Xie, M. Santillana, Shihao Yang, Yao Xie

{"title":"High-Resolution Spatio-Temporal Model for County-Level COVID-19 Activity in the U.S","authors":"Shixiang Zhu, Alexander W. Bukharin, Liyan Xie, M. Santillana, Shihao Yang, Yao Xie","doi":"10.1145/3468876","DOIUrl":"https://doi.org/10.1145/3468876","url":null,"abstract":"\u0000 We present an interpretable high-resolution spatio-temporal model to estimate COVID-19 deaths together with confirmed cases 1 week ahead of the current time, at the county level and weekly aggregated, in the United States. A notable feature of our spatio-temporal model is that it considers the (1) temporal auto- and pairwise correlation of the two local time series (confirmed cases and deaths from the COVID-19), (2) correlation between locations (propagation between counties), and (3) covariates such as local within-community mobility and social demographic factors. The within-community mobility and demographic factors, such as total population and the proportion of the elderly, are included as important predictors since they are hypothesized to be important in determining the dynamics of COVID-19. To reduce the model’s high dimensionality, we impose sparsity structures as constraints and emphasize the impact of the top 10 metropolitan areas in the nation, which we refer to (and treat within our models) as\u0000 hubs\u0000 in spreading the disease. Our retrospective out-of-sample county-level predictions were able to forecast the subsequently observed COVID-19 activity accurately. The proposed multivariate predictive models were designed to be highly interpretable, with clear identification and quantification of the most important factors that determine the dynamics of COVID-19. Ongoing work involves incorporating more covariates, such as education and income, to improve prediction accuracy and model interpretability.\u0000","PeriodicalId":178565,"journal":{"name":"ACM Trans. Manag. Inf. Syst.","volume":"152 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132087427","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: 14

AIDCOV: An Interpretable Artificial Intelligence Model for Detection of COVID-19 from Chest Radiography Images AIDCOV:一种可解释的胸片图像COVID-19检测人工智能模型

ACM Trans. Manag. Inf. Syst. Pub Date : 2020-05-25 DOI: 10.1101/2020.05.24.20111922

M. Zokaeinikoo, Pooyan Kazemian, P. Mitra, S. Kumara

{"title":"AIDCOV: An Interpretable Artificial Intelligence Model for Detection of COVID-19 from Chest Radiography Images","authors":"M. Zokaeinikoo, Pooyan Kazemian, P. Mitra, S. Kumara","doi":"10.1101/2020.05.24.20111922","DOIUrl":"https://doi.org/10.1101/2020.05.24.20111922","url":null,"abstract":"As the Coronavirus Disease 2019 (COVID-19) pandemic continues to grow globally, testing to detect COVID-19 and isolating individuals who test positive remains to be the primary strategy for preventing community spread of the disease. The current gold standard method of testing for COVID-19 is the reverse transcription polymerase chain reaction (RT-PCR) test. The RT-PCR test, however, has an imperfect sensitivity (around 70%), is time-consuming and labor-intensive, and is in short supply, particularly in resource-limited countries. Therefore, automatic and accurate detection of COVID-19 using medical imaging modalities such as chest X-ray and Computed Tomography, which are more widely available and accessible, can be beneficial. We develop a novel hierarchical attention neural network model to classify chest radiography images as belonging to a person with either COVID-19, other infections, or no pneumonia (i.e., normal). We refer to this model as Artificial Intelligence for Detection of COVID-19 (AIDCOV). The hierarchical structure in AIDCOV captures the dependency of features and improves model performance while the attention mechanism makes the model interpretable and transparent. Using a publicly available dataset of 5801 chest images, we demonstrate that our model achieves a mean cross-validation accuracy of 97.8%. AIDCOV has a sensitivity of 99.3%, a specificity of 99.98%, and a positive predictive value of 99.6% in detecting COVID-19 from chest radiography images. AIDCOV can be used in conjunction with or instead of RT-PCR testing (where RT-PCR testing is unavailable) to detect and isolate individuals with COVID-19 and prevent onward transmission to the general population and healthcare workers.","PeriodicalId":178565,"journal":{"name":"ACM Trans. Manag. Inf. Syst.","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-05-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115618753","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: 30

Are Stakeholders the Only Source of Information for Requirements Engineers? Toward a Taxonomy of Elicitation Information Sources 涉众是需求工程师唯一的信息来源吗?启发式信息源的分类研究

ACM Trans. Manag. Inf. Syst. Pub Date : 2016-10-18 DOI: 10.1145/2965085

C. Burnay

{"title":"Are Stakeholders the Only Source of Information for Requirements Engineers? Toward a Taxonomy of Elicitation Information Sources","authors":"C. Burnay","doi":"10.1145/2965085","DOIUrl":"https://doi.org/10.1145/2965085","url":null,"abstract":"Requirements elicitation consists in collecting and documenting information about the requirements from a system-to-be and about the environment of that system. Elicitation forms a critical step in the design of any information system, subject to many challenges like information incompleteness, variability, or ambiguity. To deal with these challenges, requirements engineers heavily rely on stakeholders, who turn out to be one of the most significant provider of information during elicitation. Sometimes, this comes at the cost of less attention being paid by engineers to other sources of information accessible in a business. In this article, we try to deal with this issue by studying the different sources of information that can be used by engineers when designing a system. We propose TELIS (a Taxonomy of Elicitation Sources), which can be used during elicitation to review more systematically the sources of information about a system-to-be. TELIS was produced through a series of empirical studies and was partially validated through a real-world case study. Our objective in this article is to increase the awareness of engineers about the other information providers within a business. Ultimately, we believe our taxonomy may help in better dealing with classical elicitation challenges and increase the chances of successful information systems design.","PeriodicalId":178565,"journal":{"name":"ACM Trans. Manag. Inf. Syst.","volume":"76 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114936997","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: 11

Discovering Finance Keywords via Continuous-Space Language Models 基于连续空间语言模型的金融关键词发现

ACM Trans. Manag. Inf. Syst. Pub Date : 2016-10-18 DOI: 10.1145/2948072

Ming-Feng Tsai, Chuan-Ju Wang, Po-Chuan Chien

引用次数: 27

Resource Management for Business Process Scheduling in the Presence of Availability Constraints 存在可用性约束的业务流程调度的资源管理

ACM Trans. Manag. Inf. Syst. Pub Date : 2016-10-18 DOI: 10.1145/2990197

Jiajie Xu, Chengfei Liu, Xiaohui Zhao, Sira Yongchareon, Zhiming Ding

引用次数: 17

Systemic Concentration in Sponsored Search Markets: The Role of Time Window in Click-Through-Rate Computation 赞助搜索市场的系统性集中:时间窗口在点击率计算中的作用

ACM Trans. Manag. Inf. Syst. Pub Date : 2016-08-22 DOI: 10.1145/2934695

Agam Gupta, Biswatosh Saha, U. Sarkar

引用次数: 2

A Real-Time Audit Mechanism Based on the Compression Technique 基于压缩技术的实时审计机制

ACM Trans. Manag. Inf. Syst. Pub Date : 2016-08-22 DOI: 10.1145/2629569

Shing-Han Li, D. Yen, Ying-Ping Chuang

{"title":"A Real-Time Audit Mechanism Based on the Compression Technique","authors":"Shing-Han Li, D. Yen, Ying-Ping Chuang","doi":"10.1145/2629569","DOIUrl":"https://doi.org/10.1145/2629569","url":null,"abstract":"Log management and log auditing have become increasingly crucial for enterprises in this era of information and technology explosion. The log analysis technique is useful for discovering possible problems in business processes and preventing illegal-intrusion attempts and data-tampering attacks. Because of the complexity of the dynamically changing environment, auditing a tremendous number of data is a challenging issue. We provide a real-time audit mechanism to improve the aforementioned problems in log auditing. This mechanism was developed based on the Lempel-Ziv-Welch (LZW) compression technique to facilitate effective compression and provide reliable auditing log entries. The mechanism can be used to predict unusual activities when compressing the log data according to pre-defined auditing rules. Auditors using real-time and continuous monitoring can perceive instantly the most likely anomalies or exceptions that could cause problems. We also designed a user interface that allows auditors to define the various compression and audit parameters, using real log cases in the experiment to verify the feasibility and effectiveness of this proposed audit mechanism. In summary, this mechanism changes the log access method and improves the efficiency of log analysis. This mechanism greatly simplifies auditing so that auditors must only trace the sources and causes of the problems related to the detected anomalies. This greatly reduces the processing time of analytical audit procedures and the manual checking time, and improves the log audit efficiency.","PeriodicalId":178565,"journal":{"name":"ACM Trans. Manag. Inf. Syst.","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123564414","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: 5

A Web Service Negotiation Management and QoS Dependency Modeling Framework Web服务协商管理和QoS依赖关系建模框架

ACM Trans. Manag. Inf. Syst. Pub Date : 2016-05-26 DOI: 10.1145/2893187

Khayyam Hashmi, Zaki Malik, Erfan Najmi, Amal Alhosban, B. Medjahed

{"title":"A Web Service Negotiation Management and QoS Dependency Modeling Framework","authors":"Khayyam Hashmi, Zaki Malik, Erfan Najmi, Amal Alhosban, B. Medjahed","doi":"10.1145/2893187","DOIUrl":"https://doi.org/10.1145/2893187","url":null,"abstract":"Information Management Systems that outsource part of the functionality to other (likely unknown) services need an effective way to communicate with these services, so that a mutually beneficial solution can be generated. This includes bargaining for their optimal customizations and the discovery of overlooked potential solutions. In this article, we present an automated negotiation framework for information systems (denoted as WebNeg) that can be used by both the parties for conducting negotiations. WebNeg uses a Genetic Algorithm (GA)-based approach for finding acceptable solutions in multiparty and multiobjective scenarios. The GA is enhanced using a new operator called Norm, which represents the cumulative knowledge of all the parties involved in the negotiation process. Norm incorporates the dependencies of different quality attributes of independently developed component services for the system composition. This enables WebNeg to find a better solution in the context of the current requirements. Experiment results indicate the applicability and improved performance of WebNeg (in comparison with existing similar works) in facilitating the negotiation management involved in a web service-based information composition process.","PeriodicalId":178565,"journal":{"name":"ACM Trans. Manag. Inf. Syst.","volume":"216 4","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120854591","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

Universal Artifacts: A New Approach to Business Process Management (BPM) Systems 通用构件:业务流程管理(BPM)系统的新方法

ACM Trans. Manag. Inf. Syst. Pub Date : 2016-03-29 DOI: 10.1145/2886104

Yutian Sun, Jianwen Su, Jian Yang

{"title":"Universal Artifacts: A New Approach to Business Process Management (BPM) Systems","authors":"Yutian Sun, Jianwen Su, Jian Yang","doi":"10.1145/2886104","DOIUrl":"https://doi.org/10.1145/2886104","url":null,"abstract":"In most BPM systems (a.k.a. workflow systems), the data for process execution is scattered across databases for enterprise, auxiliary local data stores within the BPM systems, and even file systems (e.g., specification of process models). The interleaving nature of data management and BP execution and the lack of a coherent conceptual data model for all data needed for execution make it hard for (1) providing Business-Process-as-a-Service (BPaaS) and (2) effective support for collaboration between business processes. The primary reason is that an enormous effort is required for maintaining both the engines and the data for the client applications. In particular, different modeling languages and different BPM systems make process interoperation one of the toughest challenges. In this article, we formulate a concept of a “universal artifact,” which extends artifact-centric models by capturing all needed data for a process instance throughout its execution. A framework called SeGA based on universal artifacts is developed to support separation of data and BP execution, a key principle for BPM systems. We demonstrate in this article that SeGA is versatile enough to fully facilitate not only executions of individual processes (to support BPaaS) but also various collaboration models. Moreover, SeGA reduces the complexity in runtime management including runtime querying, constraints enforcement, and dynamic modification upon collaboration across possibly different BPM systems.","PeriodicalId":178565,"journal":{"name":"ACM Trans. Manag. Inf. Syst.","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115119640","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: 25

The Effect of a Multichannel Customer Service System on Customer Service and Financial Performance 多渠道客户服务系统对客户服务和财务绩效的影响

ACM Trans. Manag. Inf. Syst. Pub Date : 2016-03-29 DOI: 10.1145/2875444

T. Lui, G. Piccoli

{"title":"The Effect of a Multichannel Customer Service System on Customer Service and Financial Performance","authors":"T. Lui, G. Piccoli","doi":"10.1145/2875444","DOIUrl":"https://doi.org/10.1145/2875444","url":null,"abstract":"Customer service is an important competitive lever for the modern firm. At the same time, the continuous evolution and performance improvements in information technology (IT) capabilities have enabled the utilization of multichannel service delivery strategies. Our research focuses on IT-enabled customer service systems (CSS) and their effect on firm performance. Previous studies have failed to find a consensus on the effect of a new self-service channel on the firm's performance. We argue that the embedded assumptions underpinning the previous research are responsible for these mixed findings. Consequently, using archival data from 169 hotels affiliated with a hotel chain, we designed a longitudinal multichannel study to resolve some of these inconsistencies. Our results illustrate that when firms implement an IT-enabled self-service channel to complement their existing customer service infrastructure, they experience an early negative effect on financial performance due to the disruption of the service processes. Thus, the multichannel CSS generates a positive effect only when the new process becomes a stable part of the organizational procedures. Our findings suggest that researchers evaluate the effect of a technological initiative after the new business process has been stabilized and consider that an additional IT-enabled self-service channel rarely operates in isolation.","PeriodicalId":178565,"journal":{"name":"ACM Trans. Manag. Inf. Syst.","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124262168","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: 12