Younghun Lee
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View article: Application of multi modal deep learning framework for predicting the distribution of soil organic carbon
Application of multi modal deep learning framework for predicting the distribution of soil organic carbon Open
Accurately predicting the distribution of soil organic carbon (SOC) is essential for sustainable land management and climate change mitigation. However, due to the significant spatial variability of SOC and the complex interactions among s…
View article: Characterization of an Enterococcus sp. SMC-9 strain isolated from bile of a patient with cholangitis
Characterization of an Enterococcus sp. SMC-9 strain isolated from bile of a patient with cholangitis Open
The genus Enterococcus is increasingly recognized for its involvement in various human infections, with several species known to be pathogenic. This study characterized Enterococcus sp. SMC-9, isolated from bile of a patient with cholangit…
View article: Classifying cropland vulnerability to pollutant loads across South Korea under climate change conditions using soil vulnerability index
Classifying cropland vulnerability to pollutant loads across South Korea under climate change conditions using soil vulnerability index Open
The soil vulnerability index (SVI) classifies vulnerability to cropland pollutant transport by surface runoff and leaching, helping to categorize areas with a high contribution of pollutant loads. This study aims to 1) adopt the SVI classi…
View article: Thermal and Mechanical Degradation of Recycled Polylactic Acid Filaments for Three-Dimensional Printing Applications
Thermal and Mechanical Degradation of Recycled Polylactic Acid Filaments for Three-Dimensional Printing Applications Open
The recycling of filaments used in three-dimensional (3D) printing systems not only mitigates the environmental issues associated with conventional 3D printing approaches but also simultaneously reduces manufacturing costs. This study inve…
View article: Development and Evaluation of Gellan Gum/Silk Fibroin/Chondroitin Sulfate Ternary Injectable Hydrogel for Cartilage Tissue Engineering
Development and Evaluation of Gellan Gum/Silk Fibroin/Chondroitin Sulfate Ternary Injectable Hydrogel for Cartilage Tissue Engineering Open
Hydrogel is in the spotlight as a useful biomaterial in the field of drug delivery and tissue engineering due to its similar biological properties to a native extracellular matrix (ECM). Herein, we proposed a ternary hydrogel of gellan gum…
View article: A reactive hydrodynamic simulation of noise propagation for a concrete-confined detonation
A reactive hydrodynamic simulation of noise propagation for a concrete-confined detonation Open
When a point source detonation occurs, high temperature and pressure gases are released and then propagate through the open atmosphere as a blast wave. This leads to an explosive sound in the form of environmental noise, which has been kno…
View article: Values in Crisis International (SUF edition)
Values in Crisis International (SUF edition) Open
Full edition for scientific use. The COVID-19 crisis is manifold and poses major health, economic and social challenges for current societies. Long-term monitoring of central values and attitudes of citizens in times of crises help to gras…
View article: Numerical Analysis on Characteristics of Blast Wave in Open Space and Structure
Numerical Analysis on Characteristics of Blast Wave in Open Space and Structure Open
In this study, numerical analysis was carried out on a complex pressure field of blast waves caused by the detonation of high explosives in various environments. The generated blast waves propagated in the air, upon the sudden release of h…
View article: Comparison of 16S Ribosomal RNA Targeted Sequencing and Culture for Bacterial Identification in Normally Sterile Body Fluid Samples: Report of a 10-Year Clinical Laboratory Review
Comparison of 16S Ribosomal RNA Targeted Sequencing and Culture for Bacterial Identification in Normally Sterile Body Fluid Samples: Report of a 10-Year Clinical Laboratory Review Open
As 16S ribosomal RNA (rRNA)-targeted sequencing can detect DNA from non-viable bacteria, it can be used to identify pathogens from clinical samples even in patients pretreated with antibiotics. We compared the results of 16S rRNA-targeted …
View article: A Study on Optimal Machining Conditions and Energy Efficiency in Plasma Assisted Machining of Ti-6Al-4V
A Study on Optimal Machining Conditions and Energy Efficiency in Plasma Assisted Machining of Ti-6Al-4V Open
This research objective was to determine the significant parameters for effective plasma assisted machining (PAM) of Ti-6Al-4V and to derive optimal processing conditions. PAM parameters such as feed rate, spindle speed, and depth of cut h…
View article: A reactive flow simulation for the anisotropic ignition of an explosive crystal using adaptive mesh refinement
A reactive flow simulation for the anisotropic ignition of an explosive crystal using adaptive mesh refinement Open
In this study, we consider the anisotropic or direction-dependent ignition of single crystal pentaerythritol tetranitrate (PETN). Previous experiments have shown that the anisotropic ignition of PETN is induced by the crystal orientation a…
View article: A multi-scale simulation of hot spot initiation of detonation utilizing experimental measurements
A multi-scale simulation of hot spot initiation of detonation utilizing experimental measurements Open
Empirical and phenomenological hydrodynamic reactive flow models, such as the ignition-and-growth and Johnson–Tang–Forest models, have been effective in predicting the shock initiation and detonation characteristics of various energetic su…
View article: A Comparison of Mental Health Service Systems in South Korea and U.S. : Role of Clinical Psychologists in Local Community
A Comparison of Mental Health Service Systems in South Korea and U.S. : Role of Clinical Psychologists in Local Community Open
현재 한 국에서는 바 람직한 지역사회 정신건강증진 방안을 놓고 활발한 논의가 이루어지고 있다. 특히, 효 과적인 정신건강치료 방법과 접 근성 강화 를 놓고 의견이 분분하다. 본 연구의 목적은 지역사회 정신건강증진 방법을 놓고 비슷한 문제를 겪었던 미국과 한국 사례를 비교 함으 로써, 우리나라 지역사회 정신건강서비스 체계의 문제점과 개선방안을 제안하 는 데 있다. 구체적으 로 미국과 한 국의 치료방법, 서비 스 전달체계 등을 …
View article: A two-phase model for aluminized explosives on the ballistic and brisance performance
A two-phase model for aluminized explosives on the ballistic and brisance performance Open
The performance of aluminized high explosives is considered by varying the aluminum (Al) mass fraction in a heterogeneous mixture model. Since the time scales of the characteristic induction and combustion of high explosives and Al particl…
View article: Study on impact of UV curing process of digital light processing 3-D printer on the mechanical properties and dimensional accuracies
Study on impact of UV curing process of digital light processing 3-D printer on the mechanical properties and dimensional accuracies Open
In the last decade, there has been an exponential increase of the scientific interest for smart additive manufacturing (AM) technology. Among the different AM techniques, the most commonly applied processes are digital light processing (DL…
View article: Weight reduction of automobile wheel using topology optimization and 3-D printing production
Weight reduction of automobile wheel using topology optimization and 3-D printing production Open
Recently, environmental regulations for automobiles have been strengthened and the reduction of weight for automobiles is regarded as a crucial research area for solving the air pollution problem as well as saving the energy. In the past, …
View article: Numerical Investigation of Dynamic Responses of a Thermal Elasto-plastic Tube under Kerosene-air Mixture Detonation
Numerical Investigation of Dynamic Responses of a Thermal Elasto-plastic Tube under Kerosene-air Mixture Detonation Open
본 연구에서는 케로신-공기 혼합물 데토네이션 계산과 다물질 해석을 기반으로 데토네이션 하중에 의한 얇은 금속관의 열탄소성 거동에 대한 수치계산을 수행하였다. 데토네이션 하중은 케로신-공기 혼합물의 데토네이션을 활용하여 모델링하였으며, 검증을 위해 해석 결과를 C-J 조건과 실험적 셀 직경을 통해 비교 검증하였다. 또한 금속의 탄성/소성 거동을 확인하기 위하여, 소성 거동은 구리의 Taylor impact 문제로, 탄성 거동은…
View article: Computational Algorithm for Nonlinear Large-scale/Multibody Structural Analysis Based on Co-rotational Formulation with FETI-local Method
Computational Algorithm for Nonlinear Large-scale/Multibody Structural Analysis Based on Co-rotational Formulation with FETI-local Method Open
본 논문에서는 비선형 다물체 동역학 해석에 적용 가능한 구조해석을 개발하였다. 비선형 구조 해석을 위해 Co-rotational 이론 기반의 유한요소를 개발하였다. 그리고 국부 Lagrange 승수를 활용한 영역분할해석 기법을 적용하여 대용량/다물체 해석이 가능한 구조해석 알고리듬을 개발하였다. 기 개발한 구조 해석은 외팔보 및 다물체 구조에 대한 비선형 정적 해석 예제에 적용하였다. 병렬 계산에 따른 성능 평가는 희박행렬 …