Hyejin Lee

• associate professor of practice at Tongji University

This article attempts to explore the concept of beauty using Greek and Chinese etymology. In Greek, the word 'tragedy' means 'song of the male goat'. In Chinese, the word 'beauty' means 'big goat'. Why is the goat so important? Is there a reason for the presence of this animal in the definition of aesthetics of two completely different cultures? Th...

Objectives: Lonely death is defined as "a person living in a state of social isolation, disconnected from family, relatives, and others, who dies from suicide, illness, or other causes." This study investigated the characteristics of individuals who die alone in Korea. Methods: We constructed a database of lonely death cases by linking data from...

AMoRE searches for the neutrinoless double beta decay using 100 kg of enriched ^{100}Mo. Scintillating molybdate crystals coupled with a metallic magnetic calorimeter operate at milli-Kelvin temperatures to measure the energy of electrons emitted in the decay. AMoRE-I is a demonstrator for the full-scale AMoRE, operated at the Yangyang Underground...

Objectives The purpose of this study is to investigate the impact of COVID-19 on admission and in-hospital mortality of patients with acute myocardial infarction (AMI). Methods We constructed a dataset of monthly hospitalizations and mortality of inpatients with AMI from January 2017 to December 2021 utilizing the National Health Insurance Claims...

The AMoRE collaboration searches for neutrinoless double beta decay of $$^{100}$$ 100 Mo using molybdate scintillating crystals via low temperature thermal calorimetric detection. The early phases of the experiment, AMoRE-pilot and AMoRE-I, have demonstrated competitive discovery potential. Presently, the AMoRE-II experiment, featuring a large dete...

In the field of wearable electronics and human–machine interfaces, there is a growing need for highly sensitive and adaptable sensors capable of detecting a wide range of stimuli with high precision. Traditional sensors often lack the versatility to adjust their sensitivity for different applications. Inspired by the mechanosensory system of spider...

This study examined the variability in the length of stay (LOS) and daily medical expenses (DME) for hypertension and pneumonia inpatient care. Using 10 years of National Health Insurance Service data (2010–2019), a multilevel analysis assessed variability at the patient and institutional levels. During the study period, the mean LOS decreased, whe...

Objectives: This study aimed to investigate the impact of COVID-19 on admission rates and in-hospital mortality among patients with ischemic and hemorrhagic stroke. Methods: We constructed a dataset detailing the monthly hospitalizations and mortality rates of inpatients with stroke from January 2017 to December 2021. Employing an interrupted ti...

Conventional acoustic sensors used in human–machine interfaces often face challenges such as power supply requirements, limited sensitivity, and inability to tune their frequency response. A self‐powered, highly sensitive, and frequency‐tunable triboelectric acoustic sensor inspired by the human cochlea is introduced. By mimicking hair cells in the...

Recent advancements in human–machine interfaces (HMIs), the Internet of Things (IoT), healthcare, and robotics have driven the need for technologies facilitating natural and intuitive interactions between users and devices. Central to this development are bio-inspired sensory electronics that emulate the sophisticated structures and functions of hu...

Purpose Acute myocardial infarction (AMI) and stroke are leading global causes of death and can be used to assess acute care quality. We examined the 30-day mortality trends after emergency department admission for AMI and stroke in Korea from 2008 to 2019, focusing on regional and income disparities. Materials and Methods The AMI and stroke patie...

Background Obesity has been suggested to be associated with the coronavirus disease 2019 (COVID-19); however, it is unclear whether obesity or metabolic abnormalities accompanied by obesity have a stronger association with COVID-19 risk. Methods This study used the Korea Disease Control and Prevention Agency database, which includes information ab...

Background Dizziness/vertigo is one of the most common symptoms for which people seek healthcare. However, the healthcare expenditure attributable to dizziness/vertigo in South Korea remains poorly understood. We investigated the healthcare costs due to six major disorders causing dizziness/vertigo using claims data. Methods The healthcare costs w...

Objectives: With the end of the coronavirus disease 2019 (COVID-19) pandemic, the health outcomes of this disease in Korea must be examined. We aimed to investigate health outcomes and disparities linked to socioeconomic status during the COVID-19 pandemic in Korea and to identify risk factors for hospitalization and mortality. Methods: This nat...

Background: The coronavirus disease 2019 (COVID-19) pandemic has disrupted healthcare services, including chronic disease management, for vulnerable groups, such as older individuals with hypertension. This study aimed to evaluate hypertension management in South Korea's elderly population during the pandemic using treatment consistency indices su...

Individuals with autism spectrum disorders (ASD) have difficulty accessing dental care. We aim to verify whether individuals with ASD are properly managed by checking the frequency of dental visits, cost and severity of dental treatment compared with those without ASD. This cross-sectional study used the Korean Health Insurance Database to analyze...

Background: South Korea has universal health coverage guaranteeing equitable healthcare for all. However, equity issues have been raised regarding hemodialysis reimbursement for medical aid recipients with chronic kidney disease. Physicians and civic groups demanded a revision of the discriminatory policy, and in response, the Ministry of Health a...

Background We aimed to investigate mortality, severity, and risk of hospitalization in coronavirus disease 2019 (COVID-19) patients with cancer. Methods Data of all patients aged 40–79 years from the Korean Disease Control and Prevention Agency-COVID19-National Health Insurance Service who were diagnosed with COVID-19 between January 1, 2020 and M...

The occurrence of implant-associated osteonecrosis of the jaw (ONJ) has been reported in osteoporotic patients, particularly in association with bisphosphonate therapy. This study aimed to investigate the risk of implant surgery and implant presence for ONJ occurrence in osteoporotic patients longitudinally. Based on Korean National Health Informat...

Objectives: In Korea, the National Health Insurance Service (NHIS) covers essential healthcare expenses, including cataract surgery. To address concerns that private health insurance (PHI) might have inflated the need for such procedures, we investigated the extent of the PHI-attributable increase in cataract surgery and its impact on NHIS-reimbur...

Purpose: The purpose of this study is to determine the level of health equity in relation to cancer incidence. Materials and methods: We used the National Health Insurance claims data of the National Health Insurance Service between 2005 and 2022 and annual health insurance and medical aid beneficiaries between 2011 and 2021 to investigate the d...

Background Smoking is a well-known risk factor of frailty. Handgrip strength (HGS) is highly representative of muscular strength and is used in the diagnosis of frailty; however, the relationship between smoking and HGS is not clear. We evaluated the relationship between smoking status and HGS. Objectives This study aimed to evaluate the associati...

Background The COVID-19 pandemic has caused delays and restrictions in providing medical services. In response to the medical surge, countries with social insurance systems provided financial incentives to medical institutions. This study aimed to present the directions for health insurance support by comparing countries in terms of the domains and...

Autism spectrum disorder is considered a vulnerability for many diseases including coronavirus disease 2019. This study investigated trends in coronavirus disease 2019 among children and adolescents with and without autism spectrum disorder and to evaluate whether there are differences in the prevalence, severity, and case fatality rate. We used da...

This paper reviews the research process conducted on developing a new system for industry wastewater treatment application to increase efficiency and sustainability by adopting industry 4.0 technology. The challenge of this project was to (a) utilize the design thinking methodology (human-centered design) entire process; (b) focus on heavy industry...

Plant diversity underpins ecological systems and provides materials that sustain humanity. Yet, plant diversity is being lost at a rate unparalleled in recent history, and the threat largely comes from anthropogenic pressures. As an effort to halt the continuing loss of global plant diversity, ex situ conservation has been gaining momentum. This ar...

Background: This study aimed to identify the risk factors associated with coronavirus disease 2019 (COVID-19) infection and mortality among older adults in South Korea. Methods: Using Korean National Health Insurance data from January 1, 2020, to March 31, 2022, we analyzed the impact of various factors, including age, comorbidity burden, and in...

Purpose: This longitudinal cohort study aimed to evaluate the relationship between osteonecrosis of the jaw and pulp and periapical disease in patients who were administered bisphosphonates. Methods: Using data from a nationwide cohort, we examined the association among dental caries, pulp and periapical disease, and osteonecrosis of the jaw in...

A common problem faced by contemporary retailers is consumers’ tendency to avoid purchases which postpones or prevents cash flow for retailers, negatively affecting their sales and profits. Little is known about the factors that drive consumers to avoid purchases or about marketing tactics that may reduce the tendency, especially from a cultural pe...

The main purpose of this paper is to add empirical data to the nascent field of metaverse learning and teaching by examining factors affecting student participation and their perceived experiences of different metaverse platforms. For data collection, 57 Korean undergraduates participated in a self-administered questionnaire and a short reflective...

Background: Detecting high-risk arrhythmia is important in diagnosing patients with palpitations. We compared the diagnostic accuracies of 7-day patch-type electrocardiographic (ECG) monitoring and 24-h Holter monitoring for detecting significant arrhythmias in patients with palpitations. Methods: This was a single-center prospective trial with...

This study is an initial study providing nationwide statistics regarding the prevalence of injuries and comorbidities in people with Autism Spectrum Disorder (ASD). The prevalence of injuries and comorbidities in pleple with ASD was examined in the National Health Insurance Service (NHIS) data spanning from 2010 to 2019. We found that the prevalenc...

Objectives: The coronavirus disease 2019 (COVID-19) pandemic has led to a global shortage of medical resources; therefore, we investigated whether COVID-19 impacted the quality of non-COVID-19 hospital care in Korea by comparing hospital standardized mortality rates (HSMRs) before and during the pandemic. Methods: This retrospective cohort study...

Stretchable sound-in-displays, which can generate synchronous sound and light directly from the display without a separate speaker, allow immersive audio and visual perception even on curved surfaces. In stretchable sound-in-displays, alternating current electroluminescent (ACEL) devices have been used as light-emitting sources owing to their high...

Consumer surveys are integral to marketers' understanding of consumers' judgments, preferences, and choices. However, consumers often respond in socially desirable ways, making it difficult to accurately ascertain their true preferences and reactions. In this regard, research has produced conflicting findings on who engages more in socially desirab...

Background: The epidemiology of influenza is commonly used to understand and establish relevant health policies for emerging respiratory infections, including coronavirus disease 2019 (COVID-19). However, Korea has no confirmed nationwide data on influenza incidence, severity, and mortality rate. Methods: We conducted a cross-sectional study to...

Using an energy filter in transmission electron microscopy has enabled elemental mapping at the atomic scale and improved the precision of structural determination by gating inelastic and elastic imaging electrons, respectively. Here, we use an energy filter in ultrafast electron microscopy to enhance the temporal resolution toward the domain of at...

An artificial intelligence-based design methodology is presented based on permutations and neural networks. Elements are combined in all possible ways to form all possible design solutions and a neural network extracts the best solutions after being trained on either objective or subjective criteria. This methodology is projected to have many appli...

An artificial intelligence-based design methodology is presented based on permutations and neural networks. Elements are combined in all possible ways to form all possible design solutions and a neural network extracts the best solutions after being trained on either objective or subjective criteria. This methodology is projected to have many appli...

Aid allocations choices bilateral donors make can be influenced by the institutional environment of a recipient government and the way this environment is perceived. This study examines bilateral donors’ approaches to their aid allocations in Uganda. Uganda provides an interesting case study since the government’s control over the aid funds decreas...

Background: There is limited quantitative evidence to investigate short-term suicide rates although the risk of suicide in psychiatric patients is exceptionally high in the early post-discharge period. This study aimed to explore the trends of the 30 days suicide rate after discharge using population-based data from Korea. Methods: This study wa...

Background: South Korea has utilized its National Health Insurance (NHI) system to adjust the medical fees payable for healthcare services, to financially support the frontline healthcare providers combating COVID-19. This study evaluated the composition of such adjustments to the medical fees-made to secure resource surge capacity against the pan...

This study examined the effectiveness of the Happy Mother mobile app developed for self-management of postpartum depression, based on cognitive behavioural therapy. A randomized controlled trial, with a pre- and a post-test design, was conducted in South Korea. Effectiveness was analysed using repeated measures ANOVA and Wilcoxon Signed Rank Test....

Objective This study was conducted to provide basic data for preparing a disaster nursing education program. It examined the degree of nursing students’ disaster awareness, disaster preparedness, willingness to participate in disaster response, and disaster nursing competency, aiming to determine the relationship between these attributes. Methods...

Purpose: This study aimed to examine 12-year trends in hospitalization rates for ambulatory care sensitive conditions (ACSC) and factors affecting hospitalization. Materials and methods: This study used data on Korean National Health Insurance and Medical Aid patients aged 19 and over who used medical services at least once between January 2008...

Background Although a growing body of evidence suggests air pollution is associated with low serum vitamin D status, few studies have reported whether obesity status affects this relationship. The aim of this study was to identify associations between ambient air pollution exposure, obesity, and serum vitamin D status in the general population of S...

Background Evidence suggests that low individual vitamin D levels enhance adverse effects associated with air pollution on mental health conditions. The aim of this study was to identify associations between ambient air pollution exposure, mental health, and serum vitamin D status in the general population of South Korea. Methods We included natio...

This paper demonstrates that individuals with high (vs. low) power distance belief (PDB), who tend to support inequality in society, are reluctant to change their initial judgments when receiving preference inconsistent (vs. consistent) information, thereby showing a greater preference consistency effect through three studies. This effect is driven...

The use of Artificial Intelligence (AI) has grown rapidly in the service industry and AI’s emotional capabilities have become an important feature for interacting with customers. The current research examines personal disclosures that occur during consumer interactions with AI and humans in service settings. We found that consumers’ lay beliefs abo...

Background: Since the era of "thyroid cancer epidemic," many Korean academic societies discouraged the use of ultrasonography in healthy individuals and revised the Korean Thyroid Imaging Reporting and Data System to address the overscreening and overdiagnosis issues. This study aimed to evaluate the change in the diagnostic effectiveness of thyro...

Background COVID-19 has brought changes in daily life and increased the medical burden. This study aims to evaluate the delays in healthcare services and related factors in the general population during the COVID-19 pandemic. Methods We took a nationally representative sample and conducted a mobile phone-based survey. The study was conducted anony...

Background: We investigated whether periodontal diseases contribute to the development of medication-related osteonecrosis of the jaw (MRONJ) in addition to tooth extraction, which is a major risk factor for MRONJ occurrence. Methods: This retrospective, nationwide cohort study was performed using South Korea's National Health Insurance Service...

The main purpose of this paper is to bring pioneering insights into the core line of sustainable education research by investigating the multi-dimensional aspects of teachers’ readiness to design technology-enhanced learning environments. In order to achieve this goal, this study documents the experiences of pre-service English teachers in instruct...

The current research focuses on examining how the use of artificial intelligence and robotic technology, emerging non-human agent innovations in service industries, influences consumers’ likelihood of engaging in unethical behavior. Previous research has shown that non-human (vs. human) agents are perceived differently along many dimensions by cons...

We developed and validated a fast, sensitive, and accurate analytical method using ultra high-pressure liquid chromatography-electrospray ionization tandem mass spectrometry (UHPLC-ESI–MS/MS) for simultaneous extraction and quantification of 5 targeted omega fatty acids on human dried serum spots. MS/MS was performed with multiple reaction monitori...

Background As a tool to predict early hospital readmission, little is known about the association between LACE index and all-cause mortality in older adults. We aimed to validate the LACE index to predict all-cause mortality in older adults and also analyzed the LACE index outcome of all-cause mortality depending on the disease and age of the parti...

Objectives: We investigated the awareness, experience, approval, and intention to use, and the desired type of telemedicine among the public of Korea. Methods: From November 2020 to December 2020, we conducted an online self-reported survey on awareness, experience, approval, and intent to use telemedicine services among residents aged 20 years...

We conducted a retrospective cohort study using claims data to determine the number and types of complications from coronavirus disease (COVID-19) that patients experience and which patients are more vulnerable to those complications compared with complications in patients with influenza. Among the cohort, 19.6% of COVID-19 patients and 28.5% of in...

Background In the era of coronavirus disease 2019 (COVID-19) pandemic, there is a paucity of information regarding actual prevalence of COVID-19 in pregnant women compared to non-pregnant women. The purpose of this study was to investigate the prevalence of COVID-19 infection and clinical outcome in pregnant women and non-pregnant women. Methods T...

This paper presents an emerging aspect of intentionality through recent Artificial Intelligence (AI) developments in art and design. Our main thesis is that, if we focus just on the outcome of the artistic process, the intentionality of the artist does not have any relevance. Intention is measured as a result of actions regardless of whether they a...

With the accelerating development of science and technology, the academic papers being published in various fields are increasing rapidly. Academic papers specially in science and technology fields are a crucial media for researchers who develop new technologies by identifying knowledge regarding the latest technological trends and conduct derivati...

Background: The quality ofstroke care has a significantimpact onmortality and complications. The purpose ofthisstudy wasto investigate the difference in the quality of acute stroke treatment according to the type of healthcare facility and the socioeconomic status of patients.Methods: Thisstudy used Health Insurance Review and Assessment Service’s...

Aim To evaluate the effect of dental screening on the risk of cardiovascular disease (CVD) using data from a nationwide population-based cohort. Materials and Methods This retrospective cohort study extracted data of 478,245 individuals aged 40-79 years who participated in a health screening programme in 2002-2003 from the National Health Insuranc...

Background A causal relationship of bisphosphonate (BP) exposure with osteonecrosis of the jaw (ONJ) has been reported; however, a definite dose-dependent risk remains to be elucidated beyond current vague recommendations of 4-year oral BP for ONJ risk increase. Objective To identify the effect of bisphosphonate cumulative dose on ONJ development...

Background The Democratic Republic of Timor-Leste is the newest nation in the 21st century, which became independent in 2002. Yet continued violent tensions kept the country from stabilizing its sociopolitical situations and it remains as a least developed country with many challenging issues, including food/nutrition insecurity. The international...

Purpose: Poor oral health is associated with head and neck cancer (HNC). We evaluated whether a national oral health screening program (OHSP) could reduce the risk of HNC. Materials and methods: Data from 408,247 healthy individuals aged ≥ 40 years from the National Health Insurance System-National Health Screening program during 2003 and 2004 i...

We developed and tested the effectiveness of an algorithm to prevent medical device–related pressure injuries in intensive care unit patients. It was developed in four stages: literature review and analysis of medical records; preliminary algorithm development; validation of the preliminary algorithm by experts in two rounds; and practical feasibil...

Background: This study aimed to explore the relationship between fruit intake, changes in fruit intake, and changes in cardiometabolic factors in people with obesity. Methods: A total of 21,270 subjects (8,718 men, 12,552 women) aged 40 years and over, from the Korean-based Genome and Epidemiology Study, were followed up for an average of 4.4 ye...

Purpose: During the COVID-19 pandemic, Korea has temporarily expanded coverage of teleconsultation to ensure access to essential health services. As a preliminary study, we investigated service utilization patterns and the characteristics of doctors and patients involved in these temporary teleconsultation services. Materials and methods: Using...

This paper investigates how unit root tests that are designed for non-normal errors perform in the presence of unknown forms of nonlinearity. This allows us to examine whether any neglected nonlinearity in an estimation procedure could be reflected, at least partly, in the form of non-normality. Our simulation study shows that in general, univariat...

Background: Osteonecrosis of the jaw (ONJ) is one of the complication of bisphosphonate (BP). Despite being a major risk factor for ONJ, tooth extraction cannot explain all cases of ONJ. However, disease that induce inflammation in the jawbone, such as pulp and periapical disease is underestimated, and studies suggesting relationship are arising. T...

Background The COVID-19 pandemic has radically shifted living practices, thereby influencing changes in the health status and behaviors of every person. Objective The aim of this study was to investigate the impact of COVID-19 on the self-reported health status and health behaviors along with any associated factors in adults in the Republic of Kor...

BACKGROUND The COVID-19 pandemic has radically shifted living practices, thereby influencing changes in the health status and behaviors of every person. OBJECTIVE The aim of this study was to investigate the impact of COVID-19 on the self-reported health status and health behaviors along with any associated factors in adults in the Republic of Kor...

Background Healthcare quality assessment is being conducted in many countries. Although improving health equity is one of the major objectives of medical quality assessment, it is not clear whether different socio-economic statuses show the same health outcomes even in the same medical quality hospitals. No study has directly compared the health ou...

Recently, a large volume of data related social network service (SNS) is being produced as mobile devices are evolved and SNS is being used ubiquitously. People usually refer to social media when choosing tourist destinations and deciding on tourism activities. Flickr data has been widely utilized in the study of tourism. However, existing studies...

Postpartum depression is the most common mood disorder that occurs after childbirth, rendering it a significant public health problem. Information and communication technologies hold tremendous promise for expanding the reach of quality mental healthcare and closing the treatment gap for depression. In particular, given that mobile applications are...

This study identified the effects of an integrated diabetes self-management program using smartphone application (app), based on the Information-Motivation-Behavioral skills (IMB) model. A randomized comparison, using a pre-and post-test design, was conducted with 32 participants in the experimental group and 36 in the control group. The integrated...

Background During the COVID-19 pandemic, South Korea has achieved perfect universal health coverage (UHC)—all Koreans receive UHC regardless of their socioeconomic status. The current study investigated whether socioeconomic disparities remained in COVID-19 health outcomes under UHC. Methods This retrospective, observational study included all 7,5...

The multi-bi aid from donor governments has been increasing due to its unique attributes. It allows the donors to control their aid spending and potentially influence the multilateral activities. Of the current members of the Development Assistance Committee, this study focuses on Korea and its multi-bi contribution to the World Food Programme (WFP...

We examined effects of smoking habit change on fracture risk in men. Long-term quitters and never smokers showed decreased risk for overall fractures, lumbar fractures, and other site fractures. Short-term quitters did not show decreased risk. Longer time since smoking cessation may lead to decreased fracture risk in men.PurposeCigarette smoking is...

Thermoacoustic (TA) loudspeakers have garnered significant attention in recent times as a novel film speaker that utilizes temperature oscillation to vibrate the surrounding air. Conventional film-type TA loudspeakers are known to experience problems when external environments damage their conductive networks, causing them to malfunction. Therefore...

The growing importance of human–machine interfaces and the rapid expansion of the internet of things (IoT) have inspired the integration of displays with sound generation systems to afford stretchable sound‐in‐display devices and thus establish human‐to‐machine connections via auditory system visualization. Herein, the synchronized generation of so...