Sera Kim

Doping two-dimensional (2D) semiconductors beyond their degenerate levels provides the opportunity to investigate extreme carrier density-driven superconductivity and phase transition in 2D systems. Chemical functionalization and the ionic gating have achieved the high doping density, but their effective ranges have been limited to ∼1 nm, which restricts the use of highly doped 2D semiconductors. Here, we report on electron diffusion from the 2D electride [Ca₂N]⁺·e<sup>-</s

This study aims to investigate the association of particulate matter with an aerodynamic diameter smaller than 10 μm (PM₁₀) and greenness with cause-specific mortality and their interactions in seven Korean metropolitan cities. We obtained the annual standardized cause-specific mortality rates, annual mean concentration of PM₁₀, and annual Normalized Difference Vegetation Index (NDVI) for 73 districts for the period 2008-2016. We used negative binomial regression with city-

Oxidative stress, caused by the excessive production of reactive oxygen species (ROS), results in cellular damage. Therefore, functional materials with antioxidant properties are necessary to maintain redox balance. Turmeric leaves (<i>Curcuma longa</i> L. leaves; TL) are known to have antioxidant properties, including 2,2-Diphenyl-1-picrylhydrazyl (DPPH), 2,2'-Azino-di-(3-ethylbenzothiazoline)-6-sulfonic acid (ABTS), and Hydrogen peroxide (H₂O₂) radical scavenging activity

Curcuma longa L. (turmeric) has been used as a functional food material, but other parts of it such as leaves are wasted as a byproduct. This work concentrated on developing turmeric leaves as a functional food material by establishing its optimal extraction condition. Response surface methodology was applied to optimize turmeric leaf extraction conditions. Turmeric leaves were pulled out with water and ethanol (10, 30, and 50%). Then, total phenolic compound content, total flavonoid content, an

The significance of emotion recognition technology is continuing to grow, and research in this field enables artificial intelligence to accurately understand and react to human emotions. This study aims to enhance the efficacy of emotion recognition from speech by using dimensionality reduction algorithms for visualization, effectively outlining emotion-specific audio features. As a model for emotion recognition, we propose a new model architecture that combines the bidirectional long short-term

An ELISA was developed for the diagnosis of vivax malaria using multiple stage-specific recombinant antigens of Plasmodium vivax. The DNA from the whole blood of a malaria patient was used as template to amplify the coding regions for the antigenic domains of circumsporozoite protein (CSP-1), merozoite surface protein (MSP-1), apical merozoite antigen (AMA-1), serine repeat antigen (SERA), and exported antigen (EXP-1). Each amplified DNA fragment was inserted into pQE30 plasmid to induce the exp

The van der Waals (vdW) interaction in two-dimensional (2D)-layered materials affects key characteristics of electronic devices, such as the contact resistance, with a vertical heterostructure geometry. While various functionalizations to manipulate the properties of 2D materials have shown issues such as defect generation or have a limited spatial range for the methods, engineering the vdW interaction in nondestructive ways for device applications has not been tried or properly achieved yet. He

본 연구는 청소년기 입시스트레스가 심한 인문계 고등학생을 대상으로 청소년의 스트레스의 수준을 파악하고 입시스트레스와 주관적 구강건강상태와의 관련성을 분석하고자 하였다. 2014년 9월 1일부터 9월 27일까지 부천시에 위치한 3개의 인문계 고등학교 재학생을 대상으로 자기기입식 설문조사를 실시하였고, PASW Statistics ver. 18.0 for Windows를 이용하여 최종 304부를 분석하였다. 인문계 고등학생들의 입시스트레스 수준은 전체적으로 2.71이었으며, 학년이 올라갈수록 입시스트레스가 심한 것으로 나타났다. 하위영역별 수준은 시험긴장/성적부진 스트레스가 3.08로 가장 높았고, 다음으로 미래불확실성(2.81), 부모압력(2.56), 여가생활부족(2.52) 스트레스의 순이었다. 입시스트레스와 연관성이 확인된 주관적 구강건강상태는 악관절장애, 구강점막질환, 구강건조였으며, 스트레스의 하위요소 중에서 시험긴장/성적부진 스트레스가 높을수록 치아우식증, 치주질환, 악관절장애

We introduce a sequence of polynomial invariants for Gauss diagrams which are one-to-one correspondence with virtual knot diagrams. Also, we give some properties of these polynomials and examples.

Contrary to expectations that the coronavirus pandemic would terminate quickly, the number of people infected with the virus did not decrease worldwide and coronavirus-related deaths continue to occur every day. The standard COVID-19 diagnostic test technique used today, PCR testing, requires professional staff and equipment, which is expensive and takes a long time to produce test results. In this paper, we propose a feature set consisting of four features: MFCC, Δ2-MFCC, Δ-MFCC, and spectral c

BT-RADS scores can be used as a reference guide to anticipate whether patients' subsequent MRI will be improved, stable, or worsened. The scoring system can also be used to predict clinical outcomes and prognosis.

Spontaneous intracranial hypotension (SIH) is a significant, treatable cause of postural headache, although the best diagnostic approach to diagnosing cerebrospinal fluid (CSF) leaks remains uncertain. The aim of this study is to evaluate the most common techniques used to diagnose leaks, the most frequent leak sites, and epidural patch treatment characteristics. We retrospectively reviewed the electronic medical records and radiographic findings of 30 patients clinically treated for SIH at a si