In densely populated urban areas, reinforced concrete residential buildings with an open first floor and closed upper floors are preferred to meet user demands, resulting in significant vertical stiffness irregularities. These vertical stiffness irregularities promote the development of a soft-story mechanism, leading to concentrated damage on the first floor during seismic events. To mitigate seismic damage caused by the soft-story mechanism, stiffness-based retrofit strategies are favored, and it is crucial to determine an economically optimal level of retrofitting. This study aims to establish optimal seismic retrofit strategies by evaluating the seismic losses of buildings before and after stiffness-based retrofitting. An equivalent single-degree-of-freedom model is established to describe the seismic response of a multi-degree-of-freedom model, allowing for seismic demand analysis. By convolving the seismic loss function with the hazard curve, the annual expected loss (EAL) of the building is calculated to assess the economic losses. The results show that stiffness-based retrofitting increases first-story lateral stiffness by 20-40%, enhancing structural seismic performance, but also results in a rise in EAL compared to the as-built state, indicating lower cost-effectiveness from an economic perspective. The research concludes that retrofit options that increase first-story lateral stiffness by at least 60% are more appropriate for reducing financial losses.

본 연구는 년 인성교육진흥법 시행 이후 학계에서 2015 꾸준히 논의되고 있는 대학 인성교육의 연구동 향과 주요 쟁점을 분석하고, 미래 연구의 방향성을 제시하는 데 목적이 있다. 이를 위해 2015년부터 2024 년까지 발표된 대학 인성교육 관련 논문 총 173편을 분석하였다. 분석 결과, 2015년 법 시행 직후 2016 년에는 전년 대비 관련 연구가 2배 이상 증가하였으며, 이후 대학 내 인성교육에 대한 관심이 꾸준히 확 대된 것으로 나타났다. 연구방법으로는 문헌연구(77편), 양적연구(75편), 질적연구(16편), 혼합연구(5편) 순으로 이루어졌으며, 주제 분석 결과, 효과성 분석, 운영 사례, 인식 및 요구, 교육과정 개발 순으로 연구 가 활발히 이루어진 것으로 확인되었다. 대학 인성교육 연구는 다양한 주제를 다루며, 이론과 실천의 조화 를 이루는 방향으로 발전하고 있음을 알 수 있었다. 결론적으로 미래 대학 인성교육의 질적 성장을 도모 하기 위해서는 융합형 교육과정 개발, 디지털 환경 활용, 맞춤형 교육, 교수자 역량 강화와 같은 부분이 중요한 과제가 될 것으로 보인다.

There are now many seismic observatory stations, excluding the acceleration monitoring network for infrastructures, of more than 300 operated by several public and governmental organizations across South Korea. The features of the site and properties of the stations were not investigated, and they have been assumed or guessed to estimate the site-specific seismic responses during the 2016 Gyeongju and 2017 Pohang earthquake events. For these reasons, various and intensive geotechnical and geophysical investigations have been conducted to quantify the site characteristics at 15 seismic stations selected in southeastern Korea. The VS profiles were, at first, obtained by performing only a downhole seismic test (DHT) at 7 stations, and were compared with those from a surface wave method. Then, the shear wave velocity (VS) profiles were deduced by combining three types of in situ seismic methods composed of a cross-hole seismic test, DHTs, and full-waveform sonic loggings at the 8 other stations, especially to complement the application limits of DHT and reduce the depth-dependent uncertainty in VS profile. The representative site characteristic profiles for each station regarding VS and VP with borehole stratigraphy and density were determined based on robust investigations. Various site parameters related to seismic responses at the seismic stations of interest were obtained for the site-specific geotechnical information, which would be useful to earthquake engineering practices.

A cold roll-bonding (CRB) process is applied to fabricate an AA1050/AA5052 layered sheet. In the process, commercial AA1050 and AA5052 sheets of 1 mm thickness, 40 mm width and 300 mm length are stacked onto each other, and then reduced to a thickness of 0.5 mm through a 2-pass cold rolling process without lubricant. The roll-bonded AA1050/AA5052 layered sheet is then annealed for 1 h at various temperatures from 200 to 400 °C. The specimens annealed at temperatures below 250 °C showed a typical deformation structure in which the grains were elongated along the rolling direction. However, the specimens annealed at temperatures higher than 300 °C exhibited recrystallization structures in both the AA1050 and AA5052 regions. All the roll-bonded and subsequently annealed specimens showed an inhomogeneous distribution of hardness in the thickness direction, in which the hardness in the AA5052 regions was higher than that in the AA1050 regions. As the annealing temperature increased, the tensile and yield strengths decreased and the elongation increased gradually. The mechanical properties were compared to those of commercial AA1050 and AA5052 materials and CRBed AA5052-2L materials from a previous study.

IIn the context of site response analysis, the use of shear wave velocity (  ) profiles that consider the seismological rock (  ≥ 3,000 m/s) depth is recommended. This study proposes regression analysis and machine learning-based models to predict deep   profiles for a specialized excavated rock site in South Korea. The regression model was developed by modifying mathematical expressions from a previous study and analyzing the correlation between   and model variables to predict deep   beyond 50 m. The machine learning models, designed using tree-based algorithms and a fully connected hierarchical structure, were developed to predict   from 51 m to 300 m at 1 m intervals. These models were validated by comparing them with measured deep   profiles and accurately estimating the trend of deep   variations. The proposed prediction models are expected to improve the accuracy of ground motion predictions for a specialized excavated rock site in Korea.

본 연구의 목적은 문화연구와 장애학의 융복합적 관점에서 the Good Doctor 의 자폐스펙트럼장애(ASD) 재현이 갖는 의미를 종합적이면서 심 도 있게 분석하고 비판적으로 평가하여, 사회적 장애 인식에 중요한 영 향을 미치는 드라마 속 ASD 재현의 실질적 과제를 모색하는 데 있다. 연구 결과는 다음과 같다. 첫째, 텍스트 분석 결과 생애주기에 따른 ASD 주인공의 동반 성장 서사를 통해 완전 통합 사회를 구현하였고 다양한 ASD 인물 에피소드를 통해 ASD의 현실 담론을 반영하고 변화 된 ASD 담론을 이끌고 있다. 둘째, 제작과정 분석 결과 생산자인 제작 진은 수용자인 ASD 단체뿐 아니라 다양한 관계자와 소통하며 장애인 당사자 배우 참여 등 발전된 ASD 재현을 보였다. 이러한 연구 결과를 토대로 드라마 속 ASD의 바람직한 재현을 위해 장애 당사자와 다양한 이해관계자의 제작 참여 확대, 시리즈물 제작, ASD의 다양성 재현, 실 질적인 가이드라인 개정, 사회적 장애 인식 개선 교육 확대, 장애인 제 작자 및 배우를 위한 기관이나 프로그램 육성, 드라마에 대한 다각적 심의와 장애 담론의 확산 등이 이루어져야 한다.

Lithium-ion batteries (LIBs) are widely used as essential power sources for electric vehicles and energy storage systems. Among various cathode materials, Li[Ni0.9Mn0.1]O2 (NM90) has gained significant attention for enhancing the performance of LIBs due to its high energy density and nontoxicity. However, increasing the nickel content introduces challenges, including structural instability and cation mixing. To address these issues, we propose a surface coating strategy using nitrogendoped carbon quantum dots (NCQDs). NCQDs provide high electrical conductivity and electrochemically active sites, so the NCQDs coating effectively enhanced both structural stability and electrical/ionic conductivity. The NCQDs were synthesized via a hydrothermal method, and NM90 were synthesized by co-precipitation. The fabricated NCQD/NM_5 electrode exhibited superior electrochemical properties, including a high initial capacity of 189.6 mAh/g, excellent rate performance, and an outstanding capacity retention of 81.5 % after 200 cycles in 1C. These superior results demonstrate that surface modification using the NCQDs strategy for Li[Ni0.9Mn0.1]O2 cathode materials will contribute to the further development of cycle stability and ultrafast performance in energy storage systems.

현대 사회는 교사의 권위에 대한 많은 질문이 생기는 시대이다. 이러한 때에 루터의 직업윤리는 이러한 질문에 대한 답이 될 수 있을 것이다. 루터의 직업 윤리는 종교개혁의 위대한 결실이다. 그의 직업윤리는 중세의 이원론적 직업윤리를 배경으로 할 때에 잘 파악된다. 그는 구원, 목회직, 가족관계, 직업, 교회의 직분, 특별한 사명, 일상과 관련하여 7가지 의미의 “소명” 개념을 사용하였다. 1520년의 작품들에서 루터 의 직업소명론은 인간을 소외시키지 않고 오히려 인간의 삶과 직업에 더 큰 가치를 부여한다. 모든 일을 하나님과 이웃을 섬기는 일로 보기 때문이다. 디모데전서 3:13에 대한 주석(1527/28)을 보면, 영적 소명 과 외적 소명이 같은 자리를 차지하는데 그것은 후자가 전자보다 상위 자리를 차지해서가 아니라 두 소명 모두 그리스도를 기쁘게 섬기는 일이 되기 때문이다. 1530년대 창세기 주석에서 루터는 신자들이 감사하 면서 자신의 직업에 충실할 것을 권면한다. 여기서 루터의 의도는 바람직한 기독교인의 삶의 자세를 제시 하려는 것이지, 직업을 바꿔서는 절대 안 된다는 것이 아니다. 루터는 교육을 하나님께의 봉사를 위한 도 구로 보았다. 그는 신 앞에서는 모든 인간이 평등하며 그렇기 때문에 모든 사람이 교육의 대상이 되어야 한다고 하였다. 루터의 이러한 사상들이 오늘날 교사들에게 새로운 기준을 제시하여 그 사명감을 고취하 는데 도움이 될 수 있을 것으로 본다.

급성 림프구성 백혈병의 항암치료는 메토트렉세이트, 6-머캅토퓨린, 빈크리스틴, 아스파라기나제와 같은 약제를 기반으로 한다. 아스파라기나아제 관련 췌장염은 최대 18%의 발병률을 보이는 것으로 알려져 있으며, 급성 발병 및 만성 합병증으로 백혈병에 대한 항암 치료를 중단하는 주요 원인이다. 백혈병 환자에서 항암제에 의한 췌장주위 체액저류를 치료한 사례는 다양하다. 최근 WON (벽으로 둘러 쌓인 괴사) 배액을 위해 내강 인접 금속 스텐트(LAMS)의 사용이 증가하였다. 전기 소작술로 강화된 전달 시스템을 통해 스텐트 배치가 더 간단하고 빨라졌으며 전체 절차가 간소화되고 잠재적으로 절차 시간이 단축되었다. 따라서 다양한 질환의 내시경 배액술에 LAMS를 사용하면 좋은 결과가 보고되고 있다. 본 논문에서는 급성 림프구성 백혈병을 앓고 있는 성인 환자의 L-아스파라기나제 유발 급성 췌장염 및 췌장 가성낭종을 치료하기 위해 hot-system LAMS를 시행한 사례를 논의하고자 한다.

This study presents a seismic fragility assessment methodology incorporating the cumulative damage effects of repeated seismic loading on structures. Conventional seismic fragility assessment methods typically focus on single earthquakes across multiple structures; however, seismic events often occur in sequences, with each event adding cumulative damage that can amplify the overall damage. Ignoring the effects of repeated earthquakes in fragility assessments may lead to underestimating seismic risk. This study proposes a simplified but efficient fragility assessment method that accounts for repeated earthquake effects using probabilistic combinations of each damage state. This procedure applied the capacity spectrum method to consider capacity degradation from displacement caused by prior earthquakes. Applying various earthquake scenarios, this study analyzes the effects of damage accumulation from earthquake occurrence sequences, structural behavior types, and seismic design levels on the fragility of structures under repeated earthquake events.

Humans have the ability to perceive an object’s material and properties instantaneously, and use this information to prepare for future actions. Material perception is not only an important factor for humans but also for artificial intelligence robots that are being developed. In addition, material perception is one of the important design requirements in selecting materials suitable for the products desired by consumers and pursued by designers. Because it is impossible to perform material perception using an exact formula, it is determined from tendencies that are identified in surveys. In this study, surveys with a binary selection were conducted, presenting participants with pairs of bipolar adjectives and asking them to choose one of two. After multiple surveys were conducted all the data were merged. Before merging the data, to ensure the reliability of the data homogeneity and correlation were tested using hierarchical clustering, correlation coefficient, and k-means cluster analysis. Afterwards, the merged data was used to analyze universal and comparable perceptual qualities of various material classes using relative frequency and hierarchical cluster analysis.

Over-the-scope clip (OTSC) 시스템은 위장관 질환에서 난치성 출혈, 천공, 그리고 누공을 봉합하기 위한 full-thickness 봉합 장치로 기존의 through-the-scope clip (TTSC)에 비해 더욱 강한 힘으로 조직을 움켜잡아 봉합할 수 있으며, 비교적 큰 결손을 보이는 천공도 봉합이 가능한 장점을 가지고 있다. 저자들은 괴사성 췌장염으로 발생한 대장 누공과 담도 내 삽입된 플라스틱 배액관의 이탈로 인한 십이지장 천공을 OTSC로 성공적으로 치료했던 증례를 소개하고자 한다.

Being in a stable continental region (SCR) with a limited history of instrumentation, South Korea has not collected sufficient instrumental data for data-driven ground motion models. To address this limitation, we investigated the suitability of the hybrid ground motion simulation method that Graves and Pitarka (2010, 2015) proposed for simulating earthquake ground motions in South Korea. The hybrid ground motion simulation method used in this study relies on region-specific parameters to accurately model phenomena associated with the seismic source and the wave propagation. We initially employed relevant models and parameters available in the literature as a practical approach. We incorporated a three-dimensional velocity model developed by Kim et al. (2017) and a one-dimensional velocity model presented by Kim et al. (2011) to account for the crustal velocity structure of the Korean peninsula. To represent the earthquake source, we utilized Graves and Pitarka’s rupture generator algorithm along with a magnitude-area scaling relationship developed for SCR by Leonard (2014). Additionally, we assumed the stress and attenuation parameters based on studies of regional seismicity. Using the implemented platform, we simulated the 2016 Mw5.57 Gyeongju earthquake and the 2017 Mw5.4 Pohang earthquake. Subsequently, we compared results with recorded accelerations and an empirical ground motion prediction equation at strong motion stations. Our simulations had an overall satisfactory agreement with the recorded ground motions and demonstrated the potential of broadband hybrid ground motion simulation for engineering applications in South Korea. However, limitations remain, such as the underestimation of long-period ground motions during the 2017 Pohang earthquake and the lack of a model to predict the ground motion amplification associated with the near-surface site response accurately. These limitations underscore the importance of careful validation and refinement of region-specific models and parameters for practically implementing the simulation method.

담관 협착 및 확장은 그 원인을 정확히 알기 어려운 경우가 많다. 호산구성 담관염은 담관 협착 및 확장을 일으킬 수 있는 양성 질환으로, 발생빈도는 드문 것으로 알려져 있다. 조직병리학, 방사선 사진, 내시경 및 혈액학적 소견을 종합하여 진단할 수 있으며, 스테로이드 투여를 통해 호전을 기대할 수 있다. 드물지만 담관 협착 및 확장의 감별진단 시 고려해야 하는 질환으로, 이 증례를 통해 호산구성 담관염을 알아보고자 한다.

The demand for secondary batteries is increasing rapidly with the popularization of electric vehicles and the expansion of wireless electronic devices. However, the most widely used lithium-ion batteries are subject to frequent fire incidents, limiting market growth. To avoid flammability, solid electrolyte-based systems are gaining attention for next-generation lithium-ion batteries. However, challenges such as limitations in ionic conductivity and high manufacturing costs require further research and development. In this study, we aim to identify a new nitrogen-based solid electrolyte material that has not yet been widely explored. We propose a methodology for selecting the final material through high-throughput screening (HTS), detailing the methods used for material selection and performance evaluation. In addition, we present ab initio molecular dynamics (AIMD) calculations and results for nitrogen-substituted materials with carbon and oxygen replacements, including Arrhenius plots, activation energy, and the predicted conductivity at 300K for the material with the highest Li-ion conductivity. While the performance does not yet surpass the ionic conductivity and activity of conventional solid-state electrolytes, our results provide a systematic framework for exploring and screening new solid electrolyte materials. This methodology can also be applied to the exploration of different battery materials and is expected to contribute significantly to the innovation of next-generation energy storage technologies.

Background/Aim: This study investigated the relationship between albumin-bilirubin (ALBI) grade and advanced liver fibrosis in patients with a history of gallstone disease and cholecystectomy, focusing on those diagnosed with metabolic dysfunctionassociated steatohepatitis (MASH) using the acMASH algorithm. Methods: Data from 566 subjects in the National Health and Nutrition Examination Survey 2017-2020 dataset were analyzed. MASH and advanced fibrosis (AF) were determined using acMASH and acFibroMASH algorithms, respectively. Liver stiffness measurement (LSM), ALBI grade, and other fibrosis indices were evaluated. Results: Of 566 subjects, 13 (2.3%) were diagnosed with MASH, and 65 (11.48%) had AF. MASH subjects showed significantly higher LSM values compared to non-MASH subjects (p=0.032). ALBI grade demonstrated weak positive correlations with LSM, FIB- 4, and acFibroMASH in non-MASH subjects. The AUROC for ALBI grade in identifying AF was 0.631 (95% CI 0.590-0.671). Multivariate analysis confirmed ALBI grade as an independent predictor of AF (odds ratio 0.193, 95% CI 0.1025-0.2837, p<0.001). Conclusions: ALBI grade shows potential as a non-invasive marker for advanced liver fibrosis in patients with a history of gallstone disease and cholecystectomy, particularly in those with MASH. Further studies with larger MASH cohorts are needed to validate these findings.

We report the synthesis of bimetallic Cu-Au nanotubes (NTs) and Cu@Au core-shell nanowires (NWs) for use as anti-oxidative electrodes. The fabrication involved two key approaches: galvanic replacement to produce Cu-Au NTs and the physical deposition of Au to form Cu@Au core-shell NWs. The galvanic replacement process generated hollow NTs through the Kirkendall effect, driven by the unequal diffusion rates of Cu and Au during the redox reaction. In contrast, the physical deposition of Au, facilitated by fast reduction kinetics using L-ascorbic acid, enabled the formation of a Au shell encapsulating the Cu NWs, preserving their structural integrity. Morphological and structural analyses confirmed the successful formation of both nanostructures. While the Cu-Au NTs exhibited hollow interiors and increased dimensions, the Cu@Au NWs displayed a solid core-shell morphology with minimal diameter increase. Electrical conductivity and thermal stability tests revealed the superior performance of the Cu@Au NWs. The sheet resistance of Cu@Au NWs remained as low as 4 Ω sq-1 and showed exceptional thermal stability, with minimal resistance variation (R/Ro ~1.36) even after 36 h at 120 °C under ambient conditions. In contrast, the Cu-Au NTs suffered rapid oxidation and structural instability. The physical deposition approach holds significant promise for the development of robust, low-resistance electrodes for long-term applications in harsh environments.

In stable continental regions, selecting appropriate ground motions for seismic design and dynamic response analysis presents significant challenges. This study evaluates the liquefaction potential of the Nakdonggang delta region, South Korea, by generating synthetic ground motion scenarios and applying a scenario-based liquefaction assessment approach. We utilized a hybrid broadband ground motion simulation method proposed by Graves and Pitarka (2010, 2015) to create bedrock ground motions for three hypothetical earthquakes (Mw 6.2 and 6.0) occurring along the Dongrae and Miryang faults. The generated synthetic ground motions were used as input for onedimensional nonlinear site response analyses, incorporating shear wave velocity profiles derived from surface wave inversion. The simulated ground motions demonstrated higher responses at short periods and relatively weaker responses at long periods compared to the Korean design spectra. This amplification of long-period components was attributed to the dynamic response of deep sedimentary layers, while high-frequency components were generally deamplified due to damping effects in shallow silty layers. Liquefaction susceptibility was assessed using surface ground motions derived from the site response analyses, following the SPT-based simplified method proposed by Idriss and Boulanger (2008). Results indicated high liquefaction potential across most sites for the Dongrae earthquake scenario, while liquefaction was unlikely for all sites under the Miryang-1 scenario. For the Miryang-2 scenario, liquefaction was predicted at some sites. Overall, liquefaction is expected at PGA values of approximately 0.13 g or higher, with sites exhibiting lower shear wave velocities being more vulnerable to liquefaction