The concept of resilience has gained increasing attention amid growing urbanization and rising vulnerability to infrastructure. While various methodologies exist for evaluating the resilience of lifeline systems, few address the distinct structural features and failure modes of railway networks. This study refines existing approaches by incorporating characteristics unique to high-speed railways, with a focus on two key aspects. First, we define the structure of railway networks by identifying nodes and links, and deriving link-specific resilience criteria based on the fragility characteristics and recovery profiles of their structural components. Second, we utilize real data from the Korean railway system to quantify the performance degradation caused by component failures during seismic events. To assess the framework’s applicability, we use a simplified network and a more complex one integrating Korea’s Honam Line and Honam High-Speed Line. The framework effectively identifies critical scenarios and provides a valuable tool for decision-makers in assessing seismic risk and planning recovery for railway infrastructure.

Parking lots are environments in which various types of vehicles such as passenger cars, trucks, and personal mobility (PM) devices coexist. Despite numerous studies analyzing parking lot crash characteristics, PM devices have received limited attention. Analyzing parking lot crash characteristics involving PMs is essential, given that the market penetration rate of PM is increasing. This study quantitatively analyzed the severity characteristics of vehicle-to-PM crashes in parking lots by aggregating the number of crashes and identified factors influencing crash severity through the development of an ordered probit model. According to the quantitative analysis results, PM users experienced a higher crash severity owing to insufficient personal protective equipment. Additionally, crashes involving parked or illegally parked PMs tended to have a lower severity than those involving PMs being ridden. The developed crash severity model identified several key factors, including crashes related to illegally parked vehicles, crashes in which a vehicle was at fault for a collision with a parked PM, cases in which the vehicle type of the at-fault driver was a passenger car, and cases in which the at-fault driver was a female. A higher probability of property damage crashes, rather than injury or fatal crashes, was observed in cases involving parked or illegally parked PMs owing to lower relative speeds. Passenger cars generally have shorter braking distances than trucks or buses, allowing quicker responses to sudden situations. A female at-fault driver may experience longer perception–reaction times, potentially increasing the probability of injury or fatal crashes. The findings of this study can provide foundational data for revising ordinances or laws to enhance parking lot safety or preliminary data for developing parking lot management systems. Furthermore, the identified crash severity factors can be prioritized to develop effective measures for crash prevention and severity reduction in parking lots.

본 논문은 아프리카 마다가스카르의 의료 인력 부족과 기본 외과 수술 접근성의 제약 문제를 해결하기 위해 시행된 지구병원 기본 외과 의사 양성 프로그램을 소개한다. 2017년부터 기획되어 2023~2024년 실행된 본 사업은 한국의 정부 및 비정부 기관 (KOICA, AFF, WELL International, 한국누가회 등)과 마다가스카르 보건부 및 국립보건원 (INSPC)의 협력으로 추진되었다. 마다가스카르 정부 소속 현지 공무원 의사 20명을 선발해 2년간 7가지 핵심 외과술기 중심의 훈련을 시행하고, 이후 5년간 비수도권 지구병원에 배치함으로써 약 500만 명의 주민에게 외과 진료 접근성을 제공하였다. 마다가스카르 정부의 급여 지원과 제도화 의지는 이 프로그램의 효과 및 지속 가능성을 보여주는 성과이다. 본 프로그램은 선교적 가치에 기반한 현지인 역량 강화형 의료선교 모델로, 향후 사업의 확대와 유사한 환경의 저개발국에서 적용 가능한 보건의료 인력개발 전략의 하나로서 그 가능성과 의의를 가진다.

Purpose: This study aimed to clarify the attributes of the concept of nurses' righteousness through concept analysis and to provide foundational data for fostering nurses' morality in nursing education and practice. Methods: Walker and Avant's (2004) concept analysis method was applied to identify the conceptual attributes, antecedents, and consequences. A total of 40 domestic and international studies published from 2010 to 2024 were analyzed. Results: The concept attributes were training for a righteous life, fulfilling the duties assigned to oneself, relationship-oriented nursing with concern and empathy, respect for human rights and fair nursing, acting for the benefit of the community, and courage to do the right thing. The antecedents of nurses' righteousness were nurses' moral values, ethical awareness, patient-nurse interaction, and patientnurse communication, consequences of nurses’ righteousness confirmed to be nurses' moral integration, nurses' personal growth, improved quality of nursing, improved patient satisfaction, and growth of nursing organizations. Conclusion: This study is significant in that it defines the concept of nurses' righteousness and presents a theoretical basis for developing basic qualities as a nurse. Based on these findings, education and the development of programs focused on nurses' righteousness are recommended.

본 연구는 고대 러시아 위경문학에 나타난 천국 개념을 성경과 비교하 여, 그 언어문화학적 특성과 상징 구조를 분석한 것이다. 특히 보르카체 브(С.Г. Воркачев)의 개념 구조 이론(지시적, 평가적, 상징-문화적 층 위)을 적용하여, 위경 속 천국이 단순한 종교 교리가 아닌 감각적·문화적 혼성체로 형상화됨을 밝혔다. 분석 결과, 위경의 천국은 ‘지상낙원’, ‘천 상의 에덴’, ‘천상의 예루살렘’, ‘신적 처소’ 등 위계화된 구조를 가지며, 세계수, 새, 섬 낙원, 포도나무 등 민속신화의 상징과 정교 신학이 복합 적으로 결합되어 있다. 이러한 결과는 고대 러시아 민중의 세계 인식과 종교적 정체성을 드러내며, 위경문학이 단순한 텍스트를 넘어 집단의 개 념적 상상력이 구현된 공간임을 보여준다.

Dietary fiber plays a important role in improving gut micriobiome and reproductive performance in gestating sows. This study aimed to evaluate effects of dietary supplementation with domestically produced alfalfa, provided in pelleted or mashed form, on body weight, body condition, litter performance, fecal score and fecal microbiome in gestating sows. A total of nine crossbred F1 gilts (Yorkshire × Landrace) with an average body weight of 230.33 ± 12.63 kg at 50 days of gestation were randomly assigned to three dietary treatments (n = 3 per treatment): (1) control (CON, basal diet), (2) Pellet (basal diet + 10% pelleted alfalfa), and (3) Mash (basal diet + 10% mashed alfalfa). Results indicated that alfalfa supplementation had no significant effect on weight gain during gestation (p>0.05), although sows in both alfalfa-supplemented groups showed numerically reduced weight loss during lactation compared to the control. The mashed alfalfa improved average daily weight gain of piglets during lactation (p<0.05). Moreover, the pelleted alfalfa alleviated constipation and numerically increased the relative abundance of positive microbes such as Firmicutes (phylum level), Lactobacillaceae and Ruminococcaceae (family level), and Clostridium_sensu_stricto_1, Lactobacillus, and Ruminococcaceae_UCG_002 (genus level) (p<0.05). On the other hands, it numerically decreased the relative abundance of negative microbes such as Proteobacteria in phylum level and Escherichia_Shigella in genus level. These findings suggest that domestically grown alfalfa, particularly in pellet or mash form, may be a valuable dietary fiber source for gestating sows to support piglet performance, gut health, and welfare. However, further studies with larger sample sizes are warranted to confirm these effects.

This study was performed to investigate the causes of bacterial brown blotch in Agaricus bisporus by analyzing environmental factors using sensors and growth factor characteristics. We found no direct correlation between the CO2 concentration and bacterial brown blotch among the evaluated cultivation environmental factors. However, maintaining the CO2 concentration at 500–2,000 ppm during the harvest period increased the hardness of the mushrooms. Ventilation for 40 min at dawn every day during this period helped prevent the development of bacterial brown blotch by reducing water condensation inside the grower. The incidence of browning disease was reduced to 1% when the medium layer humidity index was decreased to approximately 10 at harvest time and the leaf sensor moisture index was maintained at 430–490.

A hybrid energy harvester that consisted of thermoelectric (TE) composite film and electrospun piezoelectric (PE) polymeric membranes was constructed. TE composites were fabricated by dispersing inorganic TE powders inside polyvinylidene fluoride elastomer using a drop-casting technique. The polyvinylidene fluoride-trifluoroethylene, which was chosen due to its excellent chemical resistance, mechanical stability, and biocompatibility, was electrospun onto an aluminum foil to fabricate the ultra-flexible PE membranes. To create a hybrid energy harvester that can simultaneously convert heat and mechanical energy resources into electricity, the TE composite films attached to the PE membrane were encapsulated with protective polydimethylsiloxane. The fabricated energy harvester converted the outputs with a maximum voltage of 4 V (PE performance) and current signals of 0.2 μA (TE performance) under periodical heat input and mechanical bending in hybrid modes. This study demonstrates the potential of the hybrid energy harvester for powering flexible and wearable electronics, offering a sustainable and reliable power source.

This study evaluated the safety impact of automated traffic enforcement cameras targeting tailgating behavior at signalized intersections by comparing traffic conditions shortly after installation and one year later. The Kukkiwon intersection in Gangnam-gu, Seoul, South Korea was selected as the study site. Individual vehicle speeds, accelerations, and subsequent distances were extracted from video data using YOLOv8 and ByteTrack, which are advanced deep learning-based object detection and tracking algorithms. Surrogate safety measures (SSM), such as time to collision (TTC), modified time to collision (MTTC), and proportion of stopping distance (PSD), were calculated to assess changes in traffic safety. Every SSM indicated an improvement one year after the installation of enforcement cameras, suggesting a reduction in collision risks. In particular, the PSD indicator showed a notable improvement, reflecting a better maintenance of safe following distances. These results highlight the effectiveness of automated enforcement in improving intersection safety and suggest its scalability to other intersections with similar tail-gating issues. Future research should explore the long-term and multisite effects using diverse intersection types and behavioral indicators.

We investigated the effect of band gap engineering on the thermoelectric properties of n-type Cu0.008Bi2Te3 using the two-band (TB) model. The experimental measurements showed a zT of ~0.41 at 300 K and ~0.46 at 520 K, with an optical band gap of ~0.13 eV. While fixing the density-of-state effective mass (md *), deformation potential (Edef), lattice thermal conductivity (κl), and Fermi level based fitted based on experimental data, we varied the band gap (Eg) from 0.1 to 0.3 eV to analyze its impact on the thermoelectric performance. The TB model calculations revealed that the power factor (PF) increased and the thermal conductivity (κ) decreased with increasing Eg at both 300 K and 520 K, leading to an enhancement in zT. The magnitude of this enhancement was more pronounced at 520 K than at 300 K, which can be attributed to the suppressed bipolar effects at higher temperatures. Our findings suggest that increasing the band gap of Cu0.008Bi2Te3 can significantly improve its thermoelectric performance, to an estimated maximum zT of ~0.61 at 520 K for Eg = 0.3 eV. The theoretical maximum zT, considering the optimized hole concentration (nH), was estimated to be ~0.75. We demonstrate that Eg engineering of narrowbandgap semiconductor thermoelectric materials can significantly enhance thermoelectric performance.

본 연구는 도박 중독자의 비합리적 도박신념, 자기조절력과 가족건강 성이 일상생활적응에 미치는 영향을 분석하고 비합리적 도박신념과 일상 생활적응 관계에서 자기조절력과 가족건강성의 매개효과를 실증적으로 검증하는데 목적을 두었다. 본 연구에서는 G광역시 소재 도박문제예방치 유센터에서 도박중독 상담을 받고 있는 내담자 135명을 연구대상으로 선 정하여 설문 조사를 수행하였다. 수집된 자료는 SPSS 프로그램을 이용 하여 측정도구의 신뢰도 검증, 빈도분석, 기술통계, 상관관계분석, 중다 회귀분석, 매개회귀분석을 실시하였다. 연구결과를 정리하면, 첫째, 도박 중독자의 비합리적 도박신념의 자기과신적 비논리적 추론(β =-.351, p<01), 기술 과대평가적 추론(β =-.277, p <05)은 일상생활적응에 부정적인 영향 을 미치고, 자기조절력과 가족건강성은 일상생활적응에 긍정적인 영향을 미치는 것으로 나타났다. 둘째, 도박 중독자의 비합리적 신념과 일상생활 적응 관계에서 자기조절력(β =.587, p <001)과 가족건강성(β =.231, p <01)은 완전 및 부분매개변수로서 유의한 효과가 있는 것으로 나타났다. 본 연 구는 도박 중독자의 자기조절력과 가족건강성은 이들의 비합리적 도박신 념을 완화하여 일상생활적응을 증진할 수 있는 중요한 변인임을 시사하 고 있다.

지능정보사회에 대응한 교육 환경의 변화가 예상됨에 따라 본 연구에서는 학습자가 AI 기반 학습플랫 폼을 어떻게 인식하고 있는지 학업정서와 학습동기적 측면에 대해 질적으로 탐색하고자 하였다. 이를 위 해 AI 기반 학습플랫폼을 경험한 초등학생 및 중􌝆고등학생 7명을 연구참여자로 선정하였으며 그들이 경험 한 학업정서 및 학습동기에 대해 반구조화된 면담을 실시하였다. 면담 자료는 연구문제를 중심으로 자료 를 체계적으로 정리하여 기술하는 방법인 질적 내용분석(Qualitative content analysis: QCA)을 통해 분석 하였다. 그 결과 학업정서는 2개의 상위범주와 9개의 하위범주로 구성되었다. 구체적으로, 연구참여자들은 AI 기반 학습플랫폼을 사용하면서 긍정정서와 부정정서를 경험한 것으로 나타났다. 긍정정서로는 만족감, 성취감, 기대감, 즐거움, 안도감을 경험하였으며, 부정정서로는 답답함, 우울함, 좌절감, 불안함을 경험하였 다. 학습동기는 5개의 하위범주로 나뉘어졌고, AI 학습이 학습동기에 도움을 준 이유는 5개의 주제묶음으 로 구성되었다. 결과를 구체적으로 상술하면, AI 기반 학습플랫폼을 사용한 학습자들은 몰입, 자율성, 흥 미, 자기효능감, 자기조절성을 경험한 것으로 확인되었다. 또한 AI 학습을 경험한 학습자들은 AI 학습플랫 폼이 학습동기에 도움을 준 이유로 AI의 기능적 측면, AI 콘텐츠, 보상, 피드백, 게임 요소 등을 꼽았다. 이러한 결과를 기반으로 선행연구와 연계하여 논의하였다.

In various machines used in industrial sites and transportation equipment, fastening structures of bolts and nuts are widely employed. However, conventional Steel sockets, classified as non-explosion-proof materials, have a high likelihood of generating sparks due to friction with components, which can lead to explosions or large-scale fires. To address this issue, this study developed a lightweight explosion-protection socket using AL-7075-T6 aluminum alloy, which is known for its excellent explosion-proof properties. However, due to the inherent characteristics of aluminum, it has lower rigidity compared to Steel, requiring the use of more expensive alloy materials. Therefore, our research team utilized Finite Element Analysis (FEA) and Multi-Objective Genetic Algorithm (MOGA) to optimize the mass and safety factor of the socket, proposing a design that simultaneously achieves both weight reduction and structural stability. The socket developed in this study is approximately 30% lighter than traditional Steel-based sockets while maintaining a safety factor of 1.2 or higher, significantly enhancing operational safety in explosive environments. This research sets a new standard in the design and manufacturing process of explosion-proof sockets and is expected to contribute to the optimization of various explosion-proof equipment in the future.

본고는 청대 협의공안소설의 대표작 三俠五義 속 서술적 특징 중 하나인 상투구 가 조선시대에 출간된 包閻羅演義에서 어떻게 수용되어 활용되는지에 대해 논의하 는 데 있다. 상투구는 백화소설에 자주 등장하는 서술 방식이면서 스토리를 구성하 는 중요한 요소이기도 하다. 하지만 백화소설의 원본인 공연본이 현재까지 대부분 유실되어 상투구가 형성된 원인에 대한 고찰이 쉽지 않던 중 三俠五義 원본 계열 石派書龍圖公案이 발견되어 상투구에 대한 근원적인 논의가 가능하게 되었다. 따 라서 이에 대한 연구 성과가 학계에 조금씩 소개되고 있는데 三俠五義 최초의 국 내 버전 包閻羅演義 스토리 역시 상투구로 구성됨을 발견하게 되었다. 이에 따라 三俠五義 상투구가 국내 버전에 어떠한 형태로 수용되어 설정되었는지에 대한 논 의가 이뤄질 수 있다면 해당 작품 속 스토리의 구성 요소가 수용된 근거 뿐만 아니라 三俠五義가 包閻羅演義로 재창작된 근거 역시 제시할 수 있을 것으로 여겨진 다. 따라서 본고는 三俠五義가 包閻羅演義로 재창작되는 과정에서 전자의 상투 구가 어떠한 형태로 수용되어 적용되는지를 살펴보기 위해 두 텍스트 속 상투구를 비교분석 하고자 한다.

The world population is rapidly increasing; over the past 40 years, it has risen by 3.3 billion, reaching 7.8 billion people. Globally, Solanaceae plants contribute more than 6.5 million tons of food to the world’s diet, with potatoes being the fourth most produced crop, cultivated in over 300 countries. However, caution is necessary when consuming plants from the Solanaceae family, as they contain toxic substances known as alkaloids. While alkaloids can offer beneficial effects, such as antioxidants, anti-inflammatory compounds, and anti-cancer properties, tolerance to these compounds varies among individuals, meaning even very small amounts can have fatal effects.Among the major crops in the Solanaceae family, potatoes contain solanine and chaconine; tomatoes contain tomatine; and eggplants contain solasonine and solamargine. The concentration of these substances varies depending on the part of the plant, its developmental stage, and its variety. Additionally, levels can increase significantly due to environmental stress. The environment profoundly impacts the synthesis of secondary metabolites related to survival and defense. Research has confirmed that environmental conditions-such as high-temperature cultivation, low-temperature storage, drought and rainfall, strong light, weak light (shade conditions), and excessive fertilizer application-can increase alkaloid synthesis. Therefore, this study reviews research on alkaloids in Solanaceae crops.

Indoor air quality is a critical factor affecting health and quality of life, especially in spaces frequently used by sensitive populations such as adolescents. This study assessed the impact of garden ball installations and electrochemical fertilizer applications on indoor air quality in two youth centers, Center S and Center W, located in Bucheon, South Korea. PM2.5, PM10, and CO2 concentrations were monitored and analyzed based on the presence of garden balls and the use of electrochemical fertilizers. The results showed that spaces with garden balls (w/ G.B.) had significantly lower PM2.5 and PM10 concentrations compared to offices and spaces without garden balls (w/o G.B.). In Center W, the presence of garden balls alone improved air quality, highlighting the potential of vertical greening as a sustainable solution. In Center S, the application of electrochemical fertilizers during the “after + period” (when both garden balls and electrochemical fertilizers were applied) further enhanced particulate matter reduction, demonstrating the fertilizers’ ability to amplify plants’ air-purifying effects. This study provides empirical evidence that garden balls are an eco-friendly option for indoor air quality management. Combining electrochemical fertilizers with garden balls shows promise for enhancing air quality, offering a practical model for multi-use facilities such as youth centers.

The purpose of this study is to identify bias-adjusted efficiency estimates and the determinants of efficiency in the Marine-Bio industry. Efficiency was estimated using the Bootstrap-DEA model, and efficiency determinants were analyzed by utilizing the dependent variables such as company age, number of employees, location within Marine-Bio clusters, R&D performance, and debt ratio. The efficiency analysis revealed that most of the DMUs belonged to the inefficient group with efficiency values below 0.7. The primary cause of inefficiency was identified as pure technical efficiency, which reflects the effectiveness of input combinations. In the analysis of efficiency determinants, it was found that the number of employees and the debt ratio had a positive (+) effect on efficiency. Conversely, engaging in R&D activities was found to have a negative (-) effect on efficiency.