Ji-Hoon Kang

There is growing interest in microLED devices with lateral dimensions between 1 and 10 μm. However, reductions in external quantum efficiency (EQE) due to increased nonradiative recombination at the surface become an issue at these sizes. Previous attempts to study size-dependent EQE trends have been limited to dimensions above 5 μm, partly due to fabrication challenges. Here, we present size-dependent EQE data for InGaN microLEDs down to 1 μm in diameter fabricated using a process that only uti

In order to elucidate the structure-antibiotic activity relationships of the peptides, the three-dimensional structures of two hybrid peptides, CA(1-8) - MA(1-12) and CA(1-8) - ME(1-12) in trifluoroethanol-containing aqueous solution were investigated by NMR spectroscopy. Both CA(1-8) - MA(1-12) and CA(1-8) - ME(1-12) have strong antibacterial activity but only CA(1-8) - ME(1-12) has hemolytic activity against human erythrocytes. CA(1-8) - MA(1-12) has a hydrophobic 310-helix of only two turns c

Background Use of the Liver Imaging Reporting and Data System (LI‐RADS) is increasing, but the reported results for interreader agreement seem quite variable. Purpose To systematically determine the interreader agreement of LI‐RADS on magnetic resonance imaging (MRI) and to determine the sources of heterogeneity between the reported results. Study Type Systematic review and meta‐analysis. Subjects Fifteen original articles with 2968 lesions. Field Strength 1.5T and 3.0T. Assessment Two reviewers

US-guided biopsy had a high diagnostic yield for focal hepatic lesions in patients at risk for HCC. US visualization score of B or C, lesion size ≤2.0 cm, and high-risk needle pathway usage were independent risk factors for non-diagnostic results.

PURPOSE: The association between nonobese/lean nonalcoholic fatty liver disease (NAFLD) and gallstone formation remains unclear. We aimed to assess whether NAFLD is an independent risk factor for gallstones, even in nonobese or lean individuals. METHODS: We analyzed 265 353 asymptomatic adults who underwent abdominal ultrasonography. The risk of gallstone was assessed on the basis of obesity and NAFLD status. RESULTS: The overall prevalence rates of NAFLD and gallstones were 27.1% and 2.6%, resp

The liver is the most common metastatic site for colorectal cancers, and approximately 15–20% of the patients show liver metastasis on initial. Accurate detection and localization of colorectal liver metastases (CRLM) are crucial to the management of patients with colorectal cancer because CRLM is an important prognostic factor, and its surgical resection can improve the survival. Imaging studies, such as computed tomography (CT), magnetic resonance imaging (MRI), and positron emission tomograph