The objective of this study was to assess the effects of gypsum application on dry matter yield (DMY), mineral content of alfalfa (Medicago sativa L.), and soil properties in reclaimed tidal land in South Korea. The experiment was conducted in Seokmun, located on the west coast of South Korea, which is reclaimed with approximately 70 cm depth of degraded island soil. Treatments consisted of a control with no gypsum application (G0), 2 ton ha-1 (G2), and 4 ton ha-1 (G4) of gypsum application. The first harvest was carried out when the alfalfa reached 10% flowering, and subsequent harvests were conducted at 35-day intervals. Over the three-year experimental periods (2019-2021), the total DMY of G2 treatment was significantly higher than those of G0 and G4 (p<0.05). Although both G2 and G4 gypsum application treatments lowered soil pH, the G4 treatment increased the electrical conductivity (EC) content of the soil. Additionally, gypsum application affected the mineral contents of alfalfa, resulting in reduced concentration of sodium (Na) and Magnesium (Mg). Therefore, this present study suggests that a gypsum application rate of 2 ton ha-1 is optimal for improving alfalfa dry matter yield and mineral balance, as well as enhancing soil chemical properties in reclaimed tidal land in South Korea.

본 연구는 신흥시장 다국적기업(EMNEs)의 국제화 과정에서 핵심 요인으로 작용하는 제도적 거 리(institutional distance)에 대한 전략적 적응 양상을 체계적 문헌고찰을 통해 분석하는 것을 목적으로 한다. 키워드 분석에는 VOSviewer를 활용하였으며, 그 결과 여섯 개의 주요 연구 주제 가 도출되었다. 각 클러스터는 EMNEs와 제도적 거리 관련 연구의 다양한 하위 주제를 포괄하고 있다. 선행연구는 제도적 거리가 EMNEs의 국제화에 대해 제약이자 동시에 기회로 작용할 수 있 음을 보여준다. 문화적, 지리적, 규제적 거리는 운영상의 어려움을 야기할 수 있지만, 혁신과 전략 적 적응을 유도하고, 제도적 공백 속에서 새로운 기회를 창출할 수 있는 기반이 되기도 한다. 본 연 구는 체계적 문헌 고찰을 통해 위험 완화를 위한 제도적 프레임워크 활용, 자원 확보를 위한 국경 간 인수합병, 그리고 제도적 정렬을 통한 혁신 촉진 등과 같은 주요 전략들을 도출하였다. 이를 바 탕으로, EMNEs의 전략적 적응 및 제도적 거리 연구의 진화 경로를 분석하고, 체계적 이해를 위한 분석 프레임워크를 제시하고자 한다. 아울러, 트럼프 정부 2기 출범에 따른 제도 환경의 변화가 EMNEs에 미친 영향을 분석하고, 이에 기반한 향후 연구 방향을 제안하였다.

Recent global efforts to combat climate change have accelerated, with nations adopting carbon strategies such as carbon taxes and emission trading system (ETS) to support their net-zero commitments. These initiatives enable governments to enforce mitigation while maintaining their dual goal of fostering economic growth. Vietnam, a developing country, has emerged as a proactive participant by launching a national ETS, drawing from international best practices and domestic geographical advantages. This article examines the process and challenges involved in designing and implementing an ETS in Vietnam, exploring the necessary policy frameworks, institutional structures, and market mechanisms. It highlights key considerations such as the selection of sectors and entities to be covered, the allocation of emission allowances, and the establishment of new market management solutions. This article concludes with strategic recommendations to support the development of a successful and sustainable ETS mechanism in developing country like Vietnam.

Background: Stroke often results in impaired postural control and asymmetric weight distribution, which negatively affect balance and functional mobility. Previous research has demonstrated that balance training interventions incorporating proprioceptive stimulation and visual feedback can enhance postural stability in stroke survivors. However, there remains debate regarding the relative effectiveness of these two approaches. While proprioception-based training emphasizes sensory input from mechanoreceptors to improve postural control, visual feedback-based training leverages external cues to facilitate balance adjustments. Objectives: To investigation the effects of proprioception-based trunk exercise and visual-auditory feedback-based trunk exercise on sitting balance in patients with chronic stroke. Design: Randomized controlled trial. Methods: A total of 24 participants diagnosed with chronic stroke were randomly assigned to two groups: the proprioception-based trunk exercise group (PTG, n=10) and the visual-auditory feedback-based trunk exercise group (VTG, n=11). Both groups participated in a 6-week intervention program, five sessions per week, lasting 25 minutes per session. Outcome measures included the Limitation of Stability (LOS), the Korean version of the Trunk Impairment Scale (K-TIS), and the Postural Assessment Scale for Stroke (PASS). Pre- and post-intervention assessments were analyzed using paired t-tests and independent t-tests to evaluate within-group and between-group differences. Results: Both PTG and VTG groups demonstrated significant improvements in LOS, K-TIS, and PASS scores following the intervention (P<.05). However, there were no statistically significant differences between the two groups in the amount of change observed. Conclusion: The findings suggest that both proprioception-based and visualauditory feedback-based trunk exercises are effective in improving sitting balance in chronic stroke patients. The lack of a significant difference between the groups indicates that both approaches provide comparable benefits. Future research should explore long-term effects and investigate potential differences in various functional domains beyond sitting balance.

The present study investigates the use of generative artificial intelligence (AI) tools by pre-service teachers (PSTs) in lesson planning for a middle-school English as a foreign language (EFL) class, aiming to address gaps and inform teacher training. The case study examined PSTs in a South Korean university course who were tasked with creating lesson plans using generative AI to aid in lesson plan development for a middle school lesson that incorporated generative AI. Data were analyzed thematically, and results revealed that generative AI was used in topic selection, material creation, lesson organization, and language checking. While generative AI facilitated efficiency and creativity, challenges emerged, including the quality of outputs and limited incorporation of effective pedagogical strategies. These findings indicate a need for targeted training in prompt engineering, ethical considerations, pedagogy, and collaborative practices to enhance PSTs’ generative AI competencies. This study contributes to teacher education programs by providing insights into the practical integration of generative AI in pedagogical practices.

A new spider species of the genus Pholcus Walckenaer, 1805, Pholcus osaek sp. nov., in the family Pholcidae C.L. Koch, 1850, is described from Korea. This new species belongs to phungiformes-group in the genus. It can be distinguished from its congeners by the shape and structure of genital organs of both males and females. It is found on and between rock walls in mountainous mixed forests. Additionally, the taxonomic status of Pholcus uksuensis Kim & Ye, 2014 is revalidated, re-diagnosed, and redescribed based on specimens collected from the type locality. Considering differences mentioned in the diagnosis through revalidation, P. uksuensis is regarded as a distinct species. Therefore, it should be removed from the synonymy of P. woongil Huber, 2011.