Donghun Lee

While valley polarization with strong Zeeman splitting is the most prominent characteristic of two-dimensional (2D) transition metal dichalcogenide (TMD) semiconductors under magnetic fields, enhancement of the Zeeman splitting has been demonstrated by incorporating magnetic dopants into the host materials. Unlike Fe, Mn, and Co, V is a distinctive dopant for ferromagnetic semiconducting properties at room temperature with large Zeeman shifting of band edges. Nevertheless, little known is the ex

Purpose: We analyzed changes to the trends of prostate cancer management and patient characteristics at a single institute during 5 years due to the significant increase of the prostate cancer incidence and the robotic equipment in Korea. Materials and Methods: Prostate cancer patient data from a single institute recorded from 2006 to 2010 were analyzed. Cancer stage, initial treatment modalities, and the pattern of outpatient clinical management were reviewed. Results: Between 2006 and 2010, 38

Abstract Control over individual point defects in solid‐state systems is becoming increasingly important, not only for current semiconductor industries but also for next generation quantum information science and technologies. To realize the potential of these defects for scalable and high‐performance quantum applications, precise placement of defects and defect clusters at the nanoscale is required, along with improved control over the nanoscale local environment to minimize decoherence. These

연구배경: 당뇨병 환자를 대상으로 생활습관중재의 효과는 알려져 있지만 당뇨병 환자를 대상으로 복합운동을포함한 생활습관중재가 대혈관 합병증 위험도와 대사지표에 미치는 영향을 알아본 연구는 매우 제한적이다. 따라서본 연구는 복합운동 프로그램을 포함한 6주간의 생활습관 중재요법이 제2형 당뇨병 환자의 신체구성, 체력, 대혈관합병증 위험도와 대사지표의 개선에 미치는 영향을 알아보는데 목적이 있다. 방법: 본 연구의 대상자는 인천 I병원 내분비내과 외래에서 당뇨병 관리를 받고 있는 환자 중 35명을 대상으로실험군 23명, 대조군 12명을 무작위로 선정하였다. 6주간의 생활습관 중재요법으로는 운동중재와 식이중재를 실시하였으며, 운동중재에서는 운동처방사의 지도하에 주 3회 코어 및 서킷트 저항성운동 실시하였고, 자가 유산소운동을 주 2~3회 실시하였다. 식이중재는 주 1회 영양사의 교육을 통해 진행되었다. 6주간의 중재 효과를 알아보기 위해 실험군은 중재 전후 신체측정 및 혈압과 체력, 대혈관

Particulate matter (PM) 10 refers to fine dust with a diameter of less than 10 µm and induces apoptosis and inflammatory responses through oxidative stress. Citrus junos Tanaka is a citrus fruit and contains bioactive flavonoids including naringin. In the present study, we aimed to identify the preventive effect of Citrus junos Tanaka peel extract (CPE) against PM10-induced lung injury. As a proof of concept, NCI-H460 cells were treated with CPE (800 μg/mL, 12 h) in conjunction with PM10 to exam

Statins are mainstay anti-lipidaemic treatments for preventing cardiovascular diseases but also known to increase coronary artery calcification (CAC). However, underlying relationship between statin and CAC is still unclear. This study explored the mediating role of five statin-related biochemical factors [i.e., low-density lipoprotein (LDL)-cholesterol, high-density lipoprotein (HDL)-cholesterol, triglyceride, glucose, and high sensitivity C-reactive protein levels]. Seoul Metabolic Syndrome co

We demonstrate two-dimensional mapping of current flow in graphene devices by using a single-spin scanning magnetometer based on a nitrogen-vacancy defect center in diamond. We first image the stray magnetic field generated by the current and then reconstruct the current density map from the field data. We focus on the visualization of current flow around a small sized current source of ∼500 nm diameter, which works as an effective point contact. In this paper, we study two types of point-contac

Small amounts of glycidylisobutyl polyhedral oligomericsilsesquioxane (G-POSS) (up to 10 phr) were added into a immiscible polyamide12 (PA12)/polyolefin elastomer (POE) blend (70 wt%/30 wt%) by simple melt mixing. The effects of the G-POSS on phase morphology and mechanical properties were investigated by FE-SEM, tensile testing, Izod impact test and dynamic mechanical analysis. FE-SEM analysis revealed that domain size of the dispersed POE phase in matrix PA12 is decreased significantly by addi

Recent advances in nanorobotic manipulation of ferromagnetic nanowires bring new avenues for applications in the biomedical area, such as targeted drug delivery, diagnostics or localized surgery. However, probing a single nanowire and monitoring its dynamics remains a challenge since it demands high precision sensing, high-resolution imaging, and stable operations in fluidic environments. Here, we report on a novel method of imaging and sensing magnetic fields from a single ferromagnetic nanowir

The development of magnetic sensors simultaneously satisfying high magnetic sensitivity and high spatial resolution becomes more important in a wide range of fields including solid-state physics and life science. The nitrogen-vacancy (NV) center in diamond is a promising candidate to realize nanometer-scale magnetometry due to its excellent spin coherence properties, magnetic field sensitivity, atomic-scale size and versatile operation condition. Recent experiments successfully demonstrate the u

Purpose: To access the predictive value of the European Randomized Screening of Prostate Cancer Risk Calculator (ERSPC-RC) and the Prostate Cancer Prevention Trial Risk Calculator (PCPT-RC) in the Korean population. Materials and Methods: We retrospectively analyzed the data of 517 men who underwent transrectal ultrasound guided prostate biopsy between January 2008 and November 2010. Simple and multiple logistic regression analysis were performed to compare the result of prostate biopsy. Area un