Donggyu Kim
Biographic Data
| ID | 3936309 |
|---|---|
| NAME | Donggyu Kim |
| GIVEN NAMES | Donggyu |
| FAMILY NAME | Kim |
| SIGNATURE | KIM D |
| AFFILIATIONS | University of Southern California |
| ORCID | 0000-0002-9226-7065 |
| VERIFIED | Yes |
| TOTAL WORKS | 14 |
| TOTAL CITATIONS | 3 |
| AUTHOR COUNT | 14 |
| EDITOR COUNT | 0 |
| FIRST PUBLICATION YEAR | 2023 |
| LATEST PUBLICATION YEAR | 2026 |
| H-INDEX | 1 |
The deepfake doctor problem: Why labeling synthetic experts is necessary but insufficient for protecting consumer trust
Recent advances in generative AI have made it possible to create highly realistic virtual experts for use in commercial persuasion (Mogaji & Jain, 2024). In advertising, synthetic faces or voices can now be designed to resemble doctors, professors, and other authoritative figures with increasing ease (Chuan et al., 2023). Among the most consequential of these are synthetic experts, defined here as AI-generated endorsers whose persuasive function …
Matrix-based Prediction Approach for Intraday Instantaneous Volatility Vector
In this article, we introduce a novel method for predicting intraday instantaneous volatility based on Itô semimartingale models using high-frequency financial data. Several studies have highlighted stylized volatility time series features, such as interday auto-regressive dynamics and the intraday U-shaped pattern. To accommodate these volatility features, we propose an interday-by-intraday instantaneous volatility matrix process that can be dec…
Capability, Opportunity, and Motivation in a Social Multiplayer Online Game: Player Influence Dynamics in Sky: Children of Light
This study investigates networked social influence in Sky: Children of the Light , a social multiplayer online game. Drawing on survey responses ( n = 9,254) and in-game data from over 660,000 players, we use an innovative graph-based machine learning approach to quantify how individuals influence others’ playtime, and regression analyses to test predictors from the COM-B model. Results show that Capability enhances influence, although excessive …
Justice for @birdy: Queer counterpublics on Chinese TikTok (Douyin)
This study investigates the queer counterpublics on Douyin that call for social justice on LGBTQ rights. By revealing Douyin’s affective affordances to produce queer counterpublics through censorship, we propose a framework that explains how queer counterpublics navigate user–state tensions and balance affect with strategy in a dynamic discursive space. Based on our large-scale Douyin video dataset, we analyze 102,031 videos from 90,901 accounts …
Exploring reciprocity, well-being, and continuation intention in massively multiplayer online games
Tools or Teammates? Examining Agency Negotiation in Human-GenAI Collaboration In Creative Work
As Generative AI (GenAI) becomes increasingly integrated into creative work, creative professionals face an emerging dilemma: while they can leverage powerful AI capabilities through prompts, the automated process also introduces uncertainties and risks. This study, based on semi-structured interviews with 18 creative professionals, explores their experiences and perceptions of using GenAI tools in creative work. The findings revealed that GenAI’…
Novelty vs. trust in virtual influencers: Exploring the effectiveness of human-like virtual influencers and anime-like virtual influencers
This research explores influencer trustworthiness and stimulus novelty as important paths for the effectiveness of virtual influencers. We compare human-like virtual influencers (HVIs) and anime-like virtual influencers (AVIs) operating either with sponsorship disclosure or non-disclosure. In two experiments, we found that HVI (vs. AVIs) produced higher content engagement and purchase intent via greater influencer trustworthiness only when sponso…
Learning to Live with Covid-19: Informative Fictions of TikTok Misinformation and Multimodal Video Analysis
The spread of misinformation has historically been attributed to emotions, thinking styles, biases, and predispositions, but only a few studies have explored the conditions influencing its prevalence. The Theory of Informative Fictions (TIF) addresses this gap by presenting propositions that predict the conditions under which misinformation is tolerated and promoted. Building on the literature on TIF and deep learning, we uncover how property mes…
Dynamic Realized Minimum Variance Portfolio Models
This article introduces a dynamic minimum variance portfolio (MVP) model using nonlinear volatility dynamic models, based on high-frequency financial data. Specifically, we impose an autoregressive dynamic structure on MVP processes, which helps capture the MVP dynamics directly. To evaluate the dynamic MVP model, we estimate the inverse volatility matrix using the constrained l1-minimization for inverse matrix estimation (CLIME) and calculate da…
Justice behind the virtual mask: The influence of race of the virtual influencer and the creator on promoting the Black Lives Matter movement
The rise of virtual influencers is reshaping the landscape of social media, extending even to the promotion of social causes. Yet, lingering doubts persist regarding the authenticity of their motives. This research delves into the impact of both the racial identities of virtual influencers and those of their creators when linked to the support of racial movements. In terms of source credibility, results find that a creator’s racial background, bu…
Front-end AI vs. Back-end AI: New framework for securing truth in communication during the generative AI era
The proliferation of artificial intelligence (AI) in digital platforms has complicated the concept of truth in communication studies. The article presents the dichotomic framework of Front-end AI and Back-end AI to tackle the complexity of distinguishing truth. Front-end AI refers to AI technology used up-front, often as the face of a product or service, challenging the authenticity and truthfulness of content. In contrast, Back-end AI refers to …
The ethics of virtuality: Navigating the complexities of human-like virtual influencers in the social media marketing realm
OPINION article Front. Commun., 15 June 2023Sec. Media Governance and the Public Sphere Volume 8 - 2023 | https://doi.org/10.3389/fcomm.2023.1205610
Overnight GARCH-Itô Volatility Models
Various parametric volatility models for financial data have been developed to incorporate high-frequency realized volatilities and better capture market dynamics. However, because high-frequency trading data are not available during the close-to-open period, the volatility models often ignore volatility information over the close-to-open period and thus may suffer from loss of important information relevant to market dynamics. In this article, t…
Social Media Affordances of Ephemerality and Permanence: Social Comparison, Self-Esteem, and Body Image Concerns
Instagram provides users with different features, including posts and stories. Instagram post stays on the users' feeds permanently unless the content is deleted. An Instagram story has an ephemeral nature as the uploaded content vanishes after 24 h. Through a survey of 224 respondents, this study explored individuals' psychological constructs when using different Instagram features. Instagram usage pattern (i.e., use of different features (video…
Social Media Affordances of Ephemerality and Permanence: Social Comparison, Self-Esteem, and Body Image Concerns
Instagram provides users with different features, including posts and stories. Instagram post stays on the users' feeds permanently unless the content is deleted. An Instagram story has an ephemeral nature as the uploaded content vanishes after 24 h. Through a survey of 224 respondents, this study explored individuals' psychological constructs when using different Instagram features. Instagram usage pattern (i.e., use of different features (video…
Front-end AI vs. Back-end AI: New framework for securing truth in communication during the generative AI era
The proliferation of artificial intelligence (AI) in digital platforms has complicated the concept of truth in communication studies. The article presents the dichotomic framework of Front-end AI and Back-end AI to tackle the complexity of distinguishing truth. Front-end AI refers to AI technology used up-front, often as the face of a product or service, challenging the authenticity and truthfulness of content. In contrast, Back-end AI refers to …
The ethics of virtuality: Navigating the complexities of human-like virtual influencers in the social media marketing realm
OPINION article Front. Commun., 15 June 2023Sec. Media Governance and the Public Sphere Volume 8 - 2023 | https://doi.org/10.3389/fcomm.2023.1205610
Overnight GARCH-Itô Volatility Models
Various parametric volatility models for financial data have been developed to incorporate high-frequency realized volatilities and better capture market dynamics. However, because high-frequency trading data are not available during the close-to-open period, the volatility models often ignore volatility information over the close-to-open period and thus may suffer from loss of important information relevant to market dynamics. In this article, t…
Social Media Affordances of Ephemerality and Permanence: Social Comparison, Self-Esteem, and Body Image Concerns
Instagram provides users with different features, including posts and stories. Instagram post stays on the users' feeds permanently unless the content is deleted. An Instagram story has an ephemeral nature as the uploaded content vanishes after 24 h. Through a survey of 224 respondents, this study explored individuals' psychological constructs when using different Instagram features. Instagram usage pattern (i.e., use of different features (video…
Dynamic Realized Minimum Variance Portfolio Models
This article introduces a dynamic minimum variance portfolio (MVP) model using nonlinear volatility dynamic models, based on high-frequency financial data. Specifically, we impose an autoregressive dynamic structure on MVP processes, which helps capture the MVP dynamics directly. To evaluate the dynamic MVP model, we estimate the inverse volatility matrix using the constrained l1-minimization for inverse matrix estimation (CLIME) and calculate da…
Justice behind the virtual mask: The influence of race of the virtual influencer and the creator on promoting the Black Lives Matter movement
The rise of virtual influencers is reshaping the landscape of social media, extending even to the promotion of social causes. Yet, lingering doubts persist regarding the authenticity of their motives. This research delves into the impact of both the racial identities of virtual influencers and those of their creators when linked to the support of racial movements. In terms of source credibility, results find that a creator’s racial background, bu…
Exploring reciprocity, well-being, and continuation intention in massively multiplayer online games
Tools or Teammates? Examining Agency Negotiation in Human-GenAI Collaboration In Creative Work
As Generative AI (GenAI) becomes increasingly integrated into creative work, creative professionals face an emerging dilemma: while they can leverage powerful AI capabilities through prompts, the automated process also introduces uncertainties and risks. This study, based on semi-structured interviews with 18 creative professionals, explores their experiences and perceptions of using GenAI tools in creative work. The findings revealed that GenAI’…
Novelty vs. trust in virtual influencers: Exploring the effectiveness of human-like virtual influencers and anime-like virtual influencers
This research explores influencer trustworthiness and stimulus novelty as important paths for the effectiveness of virtual influencers. We compare human-like virtual influencers (HVIs) and anime-like virtual influencers (AVIs) operating either with sponsorship disclosure or non-disclosure. In two experiments, we found that HVI (vs. AVIs) produced higher content engagement and purchase intent via greater influencer trustworthiness only when sponso…
Learning to Live with Covid-19: Informative Fictions of TikTok Misinformation and Multimodal Video Analysis
The spread of misinformation has historically been attributed to emotions, thinking styles, biases, and predispositions, but only a few studies have explored the conditions influencing its prevalence. The Theory of Informative Fictions (TIF) addresses this gap by presenting propositions that predict the conditions under which misinformation is tolerated and promoted. Building on the literature on TIF and deep learning, we uncover how property mes…
The deepfake doctor problem: Why labeling synthetic experts is necessary but insufficient for protecting consumer trust
Recent advances in generative AI have made it possible to create highly realistic virtual experts for use in commercial persuasion (Mogaji & Jain, 2024). In advertising, synthetic faces or voices can now be designed to resemble doctors, professors, and other authoritative figures with increasing ease (Chuan et al., 2023). Among the most consequential of these are synthetic experts, defined here as AI-generated endorsers whose persuasive function …
Matrix-based Prediction Approach for Intraday Instantaneous Volatility Vector
In this article, we introduce a novel method for predicting intraday instantaneous volatility based on Itô semimartingale models using high-frequency financial data. Several studies have highlighted stylized volatility time series features, such as interday auto-regressive dynamics and the intraday U-shaped pattern. To accommodate these volatility features, we propose an interday-by-intraday instantaneous volatility matrix process that can be dec…
Capability, Opportunity, and Motivation in a Social Multiplayer Online Game: Player Influence Dynamics in Sky: Children of Light
This study investigates networked social influence in Sky: Children of the Light , a social multiplayer online game. Drawing on survey responses ( n = 9,254) and in-game data from over 660,000 players, we use an innovative graph-based machine learning approach to quantify how individuals influence others’ playtime, and regression analyses to test predictors from the COM-B model. Results show that Capability enhances influence, although excessive …
Justice for @birdy: Queer counterpublics on Chinese TikTok (Douyin)
This study investigates the queer counterpublics on Douyin that call for social justice on LGBTQ rights. By revealing Douyin’s affective affordances to produce queer counterpublics through censorship, we propose a framework that explains how queer counterpublics navigate user–state tensions and balance affect with strategy in a dynamic discursive space. Based on our large-scale Douyin video dataset, we analyze 102,031 videos from 90,901 accounts …
Computer Science (7 works) · Impact of Technology on Adolescents (5 works) · Digital Games and Media (4 works) · Digital Marketing and Social Media (4 works) · Econometrics (3 works) · Financial Risk and Volatility Modeling (3 works) · Generative grammar (3 works) · Internet privacy (3 works) · Media Influence and Health (3 works) · Affordance (2 works)