Kang-san Lee

The emergence of large language models has led to the development of powerful tools such as ChatGPT that can produce text indistinguishable from human-generated work. With the increasing accessibility of such technology, students across the globe may utilize it to help with their school work-a possibility that has sparked ample discussion on the integrity of student evaluation processes in the age of artificial intelligence (AI). To date, it is unclear how such tools perform compared to students

The effects of depolarization by elevated potassium concentrations were studied in PC12 cells and in stably transfected AtT-20 cells expressing wild-type or [Leu19]-recombinant tyrosine hydroxylase (rTH). Changes in the phosphorylation states of Ser19 and Ser40 in tyrosine hydroxylase (TH) were determined immunochemically using antibodies specific for the phosphorylated state of each site and compared with changes in TH activity in PC12 cell lysates and with changes in L-DOPA biosynthesis rates

A synthetic peptide corresponding to residues 32-47 of rat tyrosine hydroxylase (TH) was phosphorylated by protein kinase A at Ser40 and used to generate antibodies in rabbits. Reactivity of the anti-pTH32-47 antibodies with phospho- and dephospho-Ser40 forms of TH protein and peptide TH32-47 was compared with reactivity of antibodies to nonphosphorylated peptide and to native TH protein. In antibody-capture ELISAs, anti-pTH32-47 was more reactive with the phospho-TH than with the dephospho-TH f

The COVID-19 pandemic, with millions of Americans compelled to stay home and work remotely, presented an opportunity to explore the dynamics of social relationships in a predominantly remote world. Using the 1972-2022 General Social Surveys, we found that the pandemic significantly disrupted the patterns of social gatherings with family, friends, and neighbors but only momentarily. Drawing from the nationwide ego-network surveys of 41,033 Americans from 2020 to 2022, we found that the size and c

Abstract Although the concept of protest cycles has received much attention in the collective action literature, its empirical operationalization remains relatively crude compared to the rich theoretical discussion. Reimagining social movements as populations of interlinked protests, we demonstrate the advantages of analyzing protest event networks with a novel dataset related to South Korea’s democracy movement. In our conceptualization, protest events play the role of network nodes and links w

What determines the price of an artwork? This article leverages a comprehensive and novel dataset on art auctions of contemporary artists to examine the impact of social and visual features on the valuation of artworks across global markets. Our findings indicate that social signals allow us to predict the price of artwork exceptionally well, even approaching the professionals' prediction accuracy, while the visual features play a marginal role. This pattern is especially pronounced in emerging

The emergence of large language models has led to the development of powerful tools such as ChatGPT that can produce text indistinguishable from human-generated work. With the increasing accessibility of such technology, students across the globe may utilize it to help with their school work -- a possibility that has sparked discussions on the integrity of student evaluations in the age of artificial intelligence (AI). To date, it is unclear how such tools perform compared to students on univers

Tabulated data has been widely used to facilitate systematic and intuitive management. In particular, tabular images that contain a few simple symbols are useful for maintaining mechanical systems. Several companies have accumulated tabular images as their property. Although these images are valuable as they can be used to solve difficult problems using data-based methods, such as deep learning, they still remain unavailable because it is expensive to digitize them. For these reasons, we propose

Abstract Most models of cultural globalization describe circulation to and around conventional cultural centers. The art world becomes more inclusive, but its fundamental hierarchies remain in place. In this paper, we describe another form of cultural globalization called “decentering”, which involves the circulation and increased interconnectedness between peripheries, either with or without their integration to cultural centers. Using a mixed methods approach, we examined the global circulatio

This paper analyzes how and when non-profit organizations adopt market practices during a period of economic duress. It examines the diffusion of contentious practices that follow from a shift in institutional logics and mimetic isomorphism, with data from the population of American art museums (a sample of 501(c)(3) operating charities of NTEE (The National Taxonomy of Exempt Entities) code A51

How do organizations respond to extreme environmental challenges? We revisit DiMaggio and Powell and examine the shift in isomorphic behaviors that occur during a crisis, illustrating how shocks result in the use of nontraditional practices. We empirically examine the impact of the 2008 economic crisis on U.S. art museums’ isomorphic referent transitions in the use of market practices before and after the crisis, covering 2006 to 2011. Our findings indicate that museums altered the scope of mime