Kang Zhao

Kang Zhao
University of Iowa | UI · Department of Business Anaytics

Ph.D.

About

85
Publications
16,381
Reads
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1,630
Citations
Introduction
Kang Zhao currently works at the Department of Management Sciences, University of Iowa. Kang does research in Information Systems (Business Informatics), Data Mining and Artificial Intelligence. Their most recent publication is 'The more multidisciplinary the better? - The prevalence and interdisciplinarity of research collaborations in multidisciplinary institutions'.

Publications

Publications (85)
Article
Full-text available
The spread of misinformation on social media has become a major societal issue during recent years. In this work, we used the ongoing COVID‐19 pandemic as a case study to systematically investigate factors associated with the spread of multi‐topic misinformation related to one event on social media based on the heuristic‐systematic model. Among fac...
Article
Online health communities (OHCs) have been major resources for people with similar health concerns to interact with each other. They offer easily accessible platforms for users to seek, receive, and provide supports by posting. Taking the advantage of text mining and machine learning techniques, we identified social support type(s) in each post and...
Article
Full-text available
Performance assessment is ubiquitous and crucial in people analytics. Scientific impact, particularly, plays a significant role in the academia. This paper attempts to understand researchers' career trajectories by considering the research community as a social network, where individuals build ties with each other via coauthorship. The resulting li...
Article
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Through the development and usage of an agent‐based model, this article investigates firms' adaptive strategies against disruptions in a supply chain network. Viewing supply chain networks as complex adaptive systems, we first construct and analyze a real‐world supply chain network among 2,971 firms spanning 90 industry sectors. We then develop an...
Article
Social media provides a platform for individuals to craft personal brands and influence their perception by others, including potential employers. Yet there remains a need for more research investigating the relationship between individuals' online identities and offline outcomes. This study focuses on the context of college football recruiting, sp...
Article
As a mainstream advertising channel, Search Engine Advertising (SEA) has a huge business impact and attracts a plethora of attention from both academia and industry. One important goal of SEA is to increase sales. Nevertheless, while previous research has studied multiple factors that are potentially related to the outcome of SEA campaigns, effects...
Article
Co-movement among individual firms’ stock prices can reflect complex interfirm relationships. This paper proposes a novel method to leverage such relationships for stock price predictions by adopting inductive graph representation learning on dynamic stock graphs constructed based on historical stock price co-movement. To learn node representations...
Article
African swine fever (ASF) is a highly contagious hemorrhagic viral disease of domestic and wild pigs. ASF has led to major economic losses and adverse impacts on livelihoods of stakeholders involved in the pork food system in many European and Asian countries. While the epidemiology of ASF virus (ASFV) is fairly well understood, there is neither an...
Preprint
Full-text available
African Swine Fever (ASF) is a highly contagious hemorrhagic viral disease of domestic and wild pigs. ASF has led to huge economic loss and social impact worldwide. The biological mechanism of ASF’s infections is still not fully understood, and the lack of preventative options at the individual level further complicates this major global health cha...
Article
With different types of nodes and edges, heterogeneous networks have higher levels of structural diversity than homogeneous networks. This paper proposes an unsupervised representation learning model, named gs2vec, to address structural diversity of a node being connected to other types of nodes via different types of edges in heterogeneous network...
Preprint
Full-text available
As a mainstream marketing channel on the Internet, Search Engine Advertising (SEA) has a huge business impact and attracts a plethora of attention from both academia and industry. One important goal of advertising is to increase sales. Nevertheless, while previous research has studied multiple factors that are potentially related to the outcome of...
Article
Online health communities (OHCs) represent a great source of social support for patients and their caregivers. Better predictions of user activities in OHCs can help improve user engagement and retention, which are important to manage and sustain a successful OHC. This article proposes a general framework to predict OHC user posting activities. Dee...
Article
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Nonnegative matrix factorization (NMF) is a powerful tool for hyperspectral unmixing (HU). This method factorizes a hyperspectral cube into constituent endmembers and their fractional abundances. In this paper, we propose a two-stage nonnegative matrix factorization algorithm. During the first stage, k-means clustering is first employed to obtain t...
Article
en The goal of this article is to understand the multidisciplinary field of public affairs. Based on data and text mining on the profiles and publications of all faculty members from a list of research‐oriented U.S. public affairs programs, we describe the landscape of public affairs schools and scholars, identify 15 topics in public affairs resear...
Article
The past three decades have witnessed the tremendous growth of the number of information schools (a.k.a., iSchools) and the size of their faculty bodies. However, there is little empirical evidence in faculty hiring patterns within the community. Analyzing hand-curated data of 81 junior and 485 senior faculty members from 27 iSchools in the United...
Article
We utilize the wealth of data related to American college football recruitment as a laboratory for studying the impact of social networks on organizational turnover. We combine data about athletes’ recruiting activities and college choices with data from their Twitter social networks to predict decommitments over time - specifically, which athletes...
Article
Online smoking cessation communities help hundreds of thousands of smokers quit smoking and stay abstinent each year. Content shared by users of such communities may contain important information that could enable more effective and personally tailored cessation treatment recommendations. This study demonstrates a novel approach to determine indivi...
Article
Background Few Internet smoking cessation programs specifically address the impact of alcohol use during a quit attempt, despite its common role in relapse. This study used topic modeling to describe the most prevalent topics about alcohol in an online smoking cessation community, the prevalence of negative sentiment expressed about alcohol use in...
Article
Scientific research is increasingly relying on collaborations to address complex real-world problems. Many researchers, policymakers, and administrators consider a multidisciplinary environment an important factor for fostering research collaborations, especially interdisciplinary ones that involve researchers from different disciplines. However, i...
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Background: Little is known about the influence of online peer interactions on health behavior change. This study examined the relationship between exposure to peer sentiment about nicotine replacement therapy (NRT) in an online social network for smoking cessation and NRT use. Methods: Participants were 3297 current smokers who enrolled in an I...
Conference Paper
After being published, a document, whether it is a research paper or an online post, can make an impact when readers cite, share, or endorse it. A document may not make its greatest impact right after its publication, and some documents' impact can last a long period of time. This study develops a graphical model to capture the temporal dynamics in...
Article
This paper focuses on understanding the robustness of a supply network in the face of a disruption. We propose a decision support system for analyzing the robustness of supply chain networks against disruptions using topological analysis, performance measurement relevant to a supply chain context, and an optimization for increasing supply network p...
Article
Introduction: User generated content (UGC) is a valuable but underutilized source of information about individuals who participate in online cessation interventions. This study represents a first effort to passively detect smoking status among members of an online cessation program using UGC. Methods: Secondary data analysis was performed on dat...
Article
Successful hiring decisions are important for both academic institutions and individual faculty members. While factors including institutional prestige and gender are shown to affect faculty hiring outcome, there is a lack of study on whether and how research collaboration helps. We aimed at bridging this gap with a hand‐curated dataset of 81 junio...
Article
This study explores predictors of school choice decisions in American college football recruitment.We combine data about individual athletes' recruiting activities with social media data to predict which school the athlete will choose among those that have offered him a scholarship. While previousworks have approached school choice as a rational de...
Article
Full-text available
Introduction Use of online social networks for smoking cessation has been associated with abstinence. Little is known about the mechanisms through which the formation of social ties in an online network may influence smoking behavior. Using dynamic social network analysis, we investigated how temporal changes of an individual’s number of social net...
Data
In-degree and out-degree-aware frequencies by social network utilization group. (DOCX)
Article
Background Online health communities (OHCs) have become a major source of social support for people with health problems. Members of OHCs interact online with similar peers to seek, receive, and provide different types of social support, such as informational support, emotional support, and companionship. As active participations in an OHC are bene...
Article
Objective: Alcohol use and problem drinking are associated with smoking relapse and poor smoking-cessation success. User-generated content in online social networks for smoking cessation provides an opportunity to understand the challenges and treatment needs of smokers. This study used machine-learning text classification to identify the prevalen...
Article
Full-text available
In 1986, Lichtenstein et al. (Behav Ther. 17(5):607–19, 1986) presented the results of five studies focused on enhancing social support for smoking cessation in community-based clinic and worksite interventions. The manuscript was titled Social Support in Smoking Cessation: In Search of Effective Interventions and its main conclusion was that "atte...
Article
In this poster, we present a systematic investigation of sex disparity in 27 information schools located in the United States. Combining hand-curated complete faculty data and automatically collected publication profiles, we portrait the landscape of sex disparity in three dimensions: (i) rank; (ii) educational backgrounds; (iii) research topics. W...
Conference Paper
Regional prejudice is prevalent in Chinese cities where native residents and migrants from other parts of China lack mutual trust. Weibo users actively discuss and argue about the issue of migration, which provides a good source of data to examine the communication network regarding regional prejudice. We are interested in the posts and reposts rel...
Conference Paper
Regional prejudice is prevalent in Chinese cities where native residents and migrants from other parts of China lack mutual trust. Weibo users actively discuss and argue about the issue of migration, which provides a good source of data to examine the communication network regarding regional prejudice. We are interested in the posts and reposts rel...
Article
Full-text available
The past 2 decades have witnessed the emergence of information as a scientific discipline and the growth of information schools around the world. We analyzed the current state of the iSchool community in the U.S. with a special focus on the evolution of the community. We conducted our study from the perspectives of acquiring talents and producing r...
Article
Full-text available
Background: Online health communities (OHCs) provide a convenient and commonly used way for people to connect around shared health experiences, exchange information, and receive social support. Users often interact with peers via multiple communication methods, forming a multirelational social network. Use of OHCs is common among smokers, but to d...
Article
Introduction A challenge in Electronic Nicotine Delivery System (ENDS) research is how to refer to these devices in ways that are meaningful to current or potential users. The objectives of this study were to: 1) describe the frequency of ENDS terms in a web-based smoking cessation intervention; and 2) determine whether terms vary by U.S. geographi...
Conference Paper
Although closely related, multidisciplinarity and interdisciplinarity are different. The former indicates the co-existence of multiple disciplines while the latter is more about the integration among various areas. As collaboration between researchers from different areas is one of the major approaches for interdisciplinarity, this research investi...
Article
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This installment of Trends & Controversies provides an array of perspectives on the latest research in system informatics. Kang Zhao, Yao Xie, and Kwok-Leung Tsui introduce the work in 'System Informatics: From Methodology to Applications.' On the methodology side, in 'Projection-Based Process Monitoring and Empirical Divergence,' Wenpo Huang, Wei...
Conference Paper
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Online Health Communities (OHCs) have become a major source of social support for people with health problems. Using a case study of an OHC among breast cancer survivors, we revealed the types of social support embedded in each post using text-mining techniques. Then we aggregated users' activities related to different types of social support and i...
Article
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Using the spread of the Ice Bucket Challenge on Twitter as a case study, this research compared the concurrent diffusion patterns of both information and behaviors in online social networks. Individual behaviors in taking the Challenge were detected by applying text mining techniques to millions of tweets. After comparing diffusion dynamics of info...
Article
This paper proposes a decision support system to aid movie investment decisions at the early stage of movie productions. The system predicts the success of a movie based on its profitability by leveraging historical data from various sources. Using social network analysis and text mining techniques, the system automatically extracts several groups...
Conference Paper
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Leveraging historical data from the movie industry, this study built a predictive model for movie success, deviating from past studies by predicting profit (as opposed to revenue) at early stages of production (as opposed to just prior to release) to increase investor certainty. Our work derived several groups of novel features for each movie, base...
Article
Online health communities (OHCs) are an important source of social support for cancer survivors and their informal caregivers. This research attempted to identify leaders in a popular online forum for cancer survivors and caregivers using classification techniques. We first extracted user features from many different perspectives, including contrib...
Conference Paper
Full-text available
Online health communities (OHCs) have become a major source of social support for people with health problems. Members of OHCs interact online with those who face similar problems and are involved in different types of social supports, such as information support, emotional support and companionship. Using a case study of an OHC among breast cancer...
Article
Full-text available
Online cancer communities help members support one another, provide new perspectives about living with cancer, normalize experiences, and reduce isolation. The American Cancer Society's 166000-member Cancer Survivors Network (CSN) is the largest online peer support community for cancer patients, survivors, and caregivers. Sentiment analysis and top...
Article
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Many social networks in our daily life are bipartite networks built on reciprocity. How can we recommend users/friends to a user, so that the user is interested in and attractive to recommended users? In this research, we propose a new collaborative filtering model to improve user recommendations in reciprocal and bipartite social networks. The mod...
Article
Full-text available
Are bloggers’ topical coverages related to their contributions, impacts, and publishing styles in the blogosphere? We investigated this question by grouping bloggers on the basis of their topical coverages and comparing their publishing behaviors. From a blog website with more than 370,000 posts, we first identified two types of bloggers: specialis...
Article
Humanitarian nongovernmental organizations (NGOs) are increasingly collaborating through inter-organizational structures such as coalitions, alliances, partnerships, and coordination bodies. NGO's information technology coordination bodies are groups of NGOs aimed at improving the efficiency of ICT use in humanitarian assistance through greater coo...
Conference Paper
Many social networks in our daily life are bipartite networks that are built on reciprocity. How can we recommend users/friends to a user, so that the user is interested in and attractive to recommended users? In this research, we propose a new collaborative filtering model to improve user recommendations in reciprocal and bipartite social networks...
Article
Full-text available
What characterizes influential users in online health communities (OHCs)? We hypothesize that (1) the emotional support received by OHC members can be assessed from their sentiment ex-pressed in online interactions, and (2) such assessments can help to identify influential OHC members. Through text mining and sentiment analysis of users' online int...
Article
We describe a visual navigation interface that can organize the relevant information in a forum systematically and provide better pathways for accessing content of a medical forum. The interface consists of a smart keyword navigation graph and a smart user navigation graph. These graphs show the frequently occurring keywords in the forum posts and...
Article
Full-text available
What characterizes influential users in online health communities (OHCs)? We hypothesize that (1) the emotional support received by OHC members can be assessed from their sentiment ex-pressed in online interactions, and (2) such assessments can help to identify influential OHC members. Through text mining and sentiment analysis of users' online int...
Article
Full-text available
In this research, we study inter-organizational collaboration from the perspective of multi-relational networks. We develop an agent-based model to simulate how a collaboration network among organizations emerges from organizations’ interactions through another network: the inter-organizational communication network. Our model adds links (or edges)...
Conference Paper
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Many users join online health communities (OHC) to obtain information and seek social support. Understanding the emotional impacts of participation on patients and their informal caregivers is important for OHC managers. Ethnographical observations, interviews, and questionnaires have reported benefits from online health communities, but these appr...
Article
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In this paper, we propose a new rewiring approach for distribution networks called randomized local rewiring (RLR). We evaluate the robustness of original and rewired distribution networks using new metrics and show that the choice of a network topology can affect its robustness considerably. Some supply and distribution networks exhibit characteri...
Article
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In this paper, we study the resilience of supply net- works against disruptions and provide insights to supply chain managers on how to construct a resilient supply network from the perspective of complex network topologies. Our goal is to study how different network topologies, which are created from different growth models, affect the network's r...
Article
Full-text available
Humanitarian nongovernmental organizations (NGOs) are increasingly collaborating through inter-organizational structures such as coalitions, alliances, partnerships, and coordination bodies. NGO’s information technology coordination bodies are groups of NGOs aimed at improving the efficiency of ICT use in humanitarian assistance through greater c...
Article
Full-text available
While in recent years research has highlighted the rise of inter-organisational collaboration among organisations in the non-profit sector and has documented issues related to forming and maintaining of these relationships, there is little known about inter-organisational humanitarian information exchange and especially the motives of collaboration...
Conference Paper
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Inter-organizational networks often have multiple dimensions, each one denoting a type of relationship. In this research, we studied how one dimension of the network, a collaboration network, emerges from organizations' interaction on another dimension--the communication network. We modeled the emergence of collaboration as an event-based multi-age...
Conference Paper
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We use computational tools to study assortativity patterns in multi-dimensional inter-organizational networks on the basis of different node attributes. In the case study of an inter-organizational network in the humanitarian relief sector, we consider not only macro-level topological patterns, but also assortativity on the basis of micro-level org...
Article
Existing research on the robustness of complex networks often assumes that nodes in a network have homogeneous roles. Using a supply network as an example, this research develops new robustness metrics, including availability, proximity, accessibility, and connectivity, to reflect the heterogeneous roles of supply nodes and demand nodes in a supply...
Conference Paper
Humanitarian non-governmental organizations (NGOs) are increasingly facing complex challenges due to the high frequency of natural disasters and the growing number of actors in the humanitarian relief sector. One of these complex challenges is the management of information. In an attempt to mitigate these challenges, NGOs are increasingly collabora...
Article
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Sector wide collaboration in humanitarian information management will occur in a context defined by professionalization of information management more generally as well as evolving needs for data within the humanitarian relief sector. By accounting for these broader trends this research contributes to our understanding of collaboration in the human...
Article
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We investigated bloggers' publishing patterns by focusing on the topics that their posts cover. Applying clustering algorithms on the dataset from a blog website of 370,000 posts from 2,275 blogs, we identified two types of bloggers: specialists and generalists. Then we compared their respective contributions to the blogosphere in terms of producti...
Conference Paper
Full-text available
Identifying collaborative projects and forming coalitions for those collaborative projects are important means of coordination for humanitarian relief non-governmental organizations (NGOs). Our previous work revealed that an NGO's evaluation of candidate collaborative projects and subsequent decisions on forming coalitions are influenced by evaluat...
Conference Paper
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Online virtual laboratory is important for online science education. CyberLab is a toolkit for online virtual experiments. It is able to handle the creation, exportation, and execution of virtual experiments. We believe CyberLab is the first toolkit that allows instructors, who do not know computer programming, to create their own online virtual ex...