Publications by authors named "Seung Hoon Yoo"

Dyslipidemia is a significant risk factor for atherosclerotic cardiovascular disease (ASCVD), a leading cause of death worldwide. Burge is widely used in East Asia for cardiovascular health, showing potential benefits in lowering cholesterol and reducing inflammation. This study systematically reviewed and conducted a meta-analysis of randomized controlled trials (RCTs) to assess the clinical effectiveness of in treating dyslipidemia.

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  • South Korea decided to reach "carbon neutrality" by 2050 and is now figuring out whether to use renewable energy or nuclear power to help achieve this goal.
  • A survey with 1,000 people showed that 60.3% preferred renewable energy over nuclear power, which was only preferred by 27.7% of respondents.
  • Although more people liked renewable energy, those who liked nuclear power felt more strongly about it, and researchers analyzed the reasons behind these preferences.
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A gecko foot-inspired, mushroom-shaped artificial dry adhesive exploiting intermolecular forces between microstructure and surface has drawn research attention for its strong adhesive force. However, the high pull-off strength corresponding to the adhesive force matters when detaching fragile substrates. In this study, we report a vacuum-powered soft actuator having oblique air chambers and a dry adhesive.

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Bird deaths due to collisions with artificial structures, such as glass windows of buildings and transparent noise barriers, are continuing to occur in South Korea. The government is trying to prevent bird collisions by increasing the attachment of specially designed tapes to help birds avoid windows. This article estimates the economic benefits arising from the prevention of collisions by applying a choice experiment (CE).

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Aurelia aurita (AA), a legally registered harmful marine organism in South Korea, is damaging marine human leisure activities, local residents' tourism income, fisheries, and cooling water intake at power plants. The government is therefore seeking to eradicate AA by removing AA-attached larvae (polyps). This article looks into the public willingness to pay (WTP) for the eradication, utilizing a contingent valuation.

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Air pollution is an important global issue, and governments are making efforts to reduce air pollutant emissions. The elaborate calculation of the social costs of air pollution is essential for justifying the substantial public expenditure on air pollution control policies. This study aims to derive the monetary value of reducing different kinds of air pollutants through the public's willingness to pay (WTP).

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  • - The South Korean government is investigating the environmental conservation value (ECV) of the endangered plant Cypripedium japonicum, listed as a priority species by the Ministry of Environment and on the International Union for Conservation of Nature’s Red List.
  • - A survey conducted in May 2020 with 1,000 participants determined that the average household is willing to pay approximately KRW 3,770 (USD 3.07) annually for its conservation, totaling about KRW 76.72 billion (USD 62.42 million) nationally.
  • - Since the estimated ECV of the plant appears to exceed the costs of conservation, the paper concludes that preserving Cypripedium japonicum is socially beneficial and recommends ongoing conservation
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Background/purpose: Glass ionomers undergo degradation when exposed to fluoride, which changes the physico-chemical characteristics of the materials. The purpose of this study was to evaluate the surface changes of resin-modified glass ionomer (RMGI) when immersed in a sodium fluoride (NaF) solution according to pH and time.

Materials And Methods: 120 RMGI specimens were prepared, and 30 specimens were placed in four types of storage solutions for four weeks; pH 7 artificial saliva with or without 0.

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South Korea is pursuing an energy transition policy (ETP) of expanding the use of renewable energy and natural gas and decreasing that of nuclear energy and coal in total generation. An investigation of whether the public is for or against the ETP is needed by the government. This article explores the public preference toward the ETP employing the data collected through a survey of 1000 individuals.

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  • The COVID-19 pandemic has led to a higher demand for testing methods, with RT-PCR being the most definitive but slower option for diagnosis.
  • This study explores using a deep learning-based decision-tree classifier to analyze chest X-ray images for COVID-19 detection and related pneumonia.
  • The classifier features three decision trees, achieving high accuracy rates (98% for normal vs. abnormal images, 80% for tuberculosis detection, and 95% for COVID-19), potentially speeding up patient triage before RT-PCR results come in.
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  • The South Korean Government is considering making Jaran Bay a marine protected area to help the endangered Neophocaena asiaeorientalis species, but they need to assess public support and economic benefits first.
  • A nationwide survey of 1,000 households was conducted to determine how much people are willing to pay (WTP) for the designation, using a specific questioning method about annual income tax contributions.
  • The average WTP per household was estimated at KRW 2,665 (about USD 2.27), leading to a potential national value of KRW 53 billion (USD 45.3 million), but over 64% of respondents indicated they would not pay anything, showing challenges in gaining public consensus.
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Onshore wind farms have the advantage of a lower cost than offshore wind farms, but their negative environmental impact has been pointed out as a problem. If this environmental impact can be lessened, public acceptance of onshore wind farms will be significantly increased. This study investigates public attitudes to the lessening of the environmental impact of onshore wind farms, focusing on three specific attributes: visual impact, ecosystem destruction and noise pollution.

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  • The study aimed to investigate how different field sizes affect the Relative Biological Effectiveness (RBE) when using carbon scanning beam irradiation for cancer treatment.
  • Researchers utilized a silicon-on-insulator microdosimeter system to measure lineal energy and found that RBE values from their measurements were consistent within 6.5% of those computed by a Treatment Planning System for varying scanned areas.
  • The findings suggest that the SOI microdosimeter could serve as a reliable quality assurance tool for evaluating RBE in carbon-pencil beam scanning radiotherapy.
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The ecosystem of the Seocheon coastal wetland (SCW), one of the wetland protected areas in South Korea, was registered in the Ramsar Wetlands in 2009 as an area rich in biodiversity and inhabited by endangered wild animals and plants. Since then, preserving the ecosystem of the SCW has emerged as an important task. Thus, the South Korean government is carrying out various research and management projects to preserve the ecological integrity of the SCW.

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Combined heat and power (CHP), which produces both heat and electricity at the same time, is so efficient that it can reduce energy use and emit less carbon dioxide (CO) than conventional fossil fuel use. This article attempts to look empirically into the impact of CHP share in total electricity generation on CO emissions in a cross-country context. Data from 35 countries during the period 2009-2015 are used.

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Korean government has made and will continue to make a considerable investment in contaminated soil remediation to rectify the problems that arise from soil pollution. Quantitative information on the benefits of contaminated soil remediation is widely demanded by the public as well as the government. This article aims to assess the external benefits of contaminated soil remediation.

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The purpose of this study was to investigate the potential of gold nanoparticles as radiosensitizer for use in neutron therapy against hepatocellular carcinoma. The hepatocellular carcinoma cells lines Huh7 and HepG2 were irradiated with γ and neutron radiation in the presence or absence of gold nanoparticles. Effects were evaluated by transmission electron microscopy, cell survival, cell cycle, DNA damage, migration, and invasiveness.

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Alternating electric fields at an intermediate frequency (100~300 kHz), referred to as tumour-treating fields (TTF), are believed to interrupt the process of mitosis via apoptosis and to act as an inhibitor of cell proliferation. Although the existence of an antimitotic effect of TTF is widely known, the proposed apoptotic mechanism of TTF on cell function and the efficacy of TTF are controversial issues among medical experts. To resolve these controversial issues, a better understanding of the underlying molecular mechanisms of TTF on cell function and the differences between the effects of TTF alone and in combination with other treatment techniques is essential.

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Treatment with alternating electric fields at an intermediate frequency (100-300 kHz), referred to as tumor treating fields (TTF) therapy, inhibits cancer cell proliferation. In the present study, we demonstrated that TTF application suppressed the metastatic potential of U87 and U373 glioblastoma cell lines via the NF-kB, MAPK and PI3K/AKT signaling pathways. Wound-healing and transwell assays showed that TTF suppressed cell migration and invasion compared with controls.

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We have investigated the combined effect of tissue heterogeneity and its variation associated with geometric error in stereotactic body radiotherapy (SBRT) for lung cancer. The treatment plans for eight lung cancer patients were calculated using effective path length (EPL) correction and Monte Carlo (MC) algorithms, with both having the same beam configuration for each patient. These two kinds of plans for individual patients were then subsequently recalculated with adding systematic and random geometric errors.

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  • A study was conducted to compare the effects of tafluprost and latanoprost on ocular pulse amplitude (OPA) in patients with normal-tension glaucoma (NTG) and primary open-angle glaucoma (POAG).
  • The study involved 41 newly diagnosed patients and measured intraocular pressure (IOP) and OPA before and after treatment using different tonometry methods.
  • Results showed that tafluprost significantly reduced IOP more than latanoprost, and its effect on lowering corrected OPA was also greater, suggesting tafluprost may be a better option for patients needing IOP reduction and at risk for glaucoma progression.
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Purpose: We evaluated the angiographic features of the affected limbus in patients with pterygia and assessed limbal reconstruction outcomes after limbal-conjunctival autograft (LCA) transplantation in terms of vascular remodeling.

Methods: We studied prospectively 31 eyes of 31 patients who underwent pterygium excision and LCA transplantation; 28 eyes of 28 normal participants served as controls. Anterior segment indocyanine green angiography (ICGA) was performed for each participant preoperatively and at 1 week, and 1 and 3 months postoperatively.

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Conventional laser accelerated proton beam has broad energy spectra. It is not suitable for clinical use directly, so it is necessary for employing energy selection system. However, in the conventional laser accelerated proton system, the intensity of the proton beams in the low energy regime is higher than that in the high energy regime.

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Purpose: Esophageal tolerance is needed to guide the safe administration of stereotactic radiosurgery (SRS). We evaluated comprehensive dose-volume parameters of acute esophageal toxicity in patients with spinal metastasis treated with SRS.

Materials And Methods: From May 2008 to May 2011, 30 cases in 27 patients with spinal metastasis received single fraction SRS to targets neighboring esophagus.

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Purpose: To examine the dosimetric effect of intrafraction movements occurred during image-guided frameless brain radiosurgery and to derive the optimal margin recipe to compensate the movement.

Methods: The patients' movements during image-guided radiosurgeries were measured using skull-tracking method incorporated in the CyberKnife system. The dosimetric changes with the movements were computed using the six different dynamic-arc treatment plans based on the dose-grid analysis method.

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