Background: In community-dwelling elderly individuals, slower gait speed is closely related to the ground reaction force. In the elderly with fall experience, stride length and gait speed, and other gait parameters are closely related to gastrocnemius activation. Objectives: To investigate whether medial gastrocnemius stiffness influences gait parameters in community-dwelling elderly people who experienced falls. Design: Cross sectional study. Methods: A total of 149 community-dwelling older adults were assigned to the faller and non-faller groups. Gait parameters (step length, stride length, step width, cadence, heel and toe ground reaction force, heel and toe contact time), and stiffness of the medial and lateral gastrocnemius and tibialis anterior were measured using shear wave elastography. Results: Elderly fallers had shorter step and stride length, lower cadence and toe ground reaction force and heel contact time, and lower medial gastrocnemius stiffness than non-fallers. In elderly fallers, medial gastrocnemius stiffness was significantly correlated with step and stride length, step width, toe ground reaction force, and heel contact time. Conclusions: Lower medial gastrocnemius stiffness in the elderly fallers decreases gait parameters, which can be a risk factor for falls. Therefore, medial gastrocnemius stiffness is a major factor that may associated gait parameters that can determine the risk of fall in community-dwelling elderly individuals.

열대거세미나방이 2019년 국내에 첫 비래한 이후 매년 비래하고 있으며 옥수수 등에서 피해를 주고 있음에 따라 전북지역 주요 옥수수 재배지역에서의 열대거세미나방 발생양상과 약제방제 효과를 조사하였다. 2022년 도에 성페로몬트랩을 이용하여 성충유인량을 조사한 결과 7월 1일 첫 채집되었으며 8월 중순이후 채집량이 증가 하여 9월 중순과 10월 중순에 발생최성기를 보였으며 11월 상순까지 유인되었다. 2022년과 2023년에 식용 옥수 수 재배지역에서 열대거세미나방 유충 피해 조사 결과 6월 수확하는 옥수수에서는 열매피해가 없었으나 9월에 수확하는 옥수수에서는 피해열매율이 30% 이상인 포장들이 관찰되어 재배시기에 따라 피해 정도 차이가 매우 큰 경향이었다. 옥수수 포장에서 열대거세미나방 유충 방제를 위해 2~3령기에 인독사카브 액상수화제를 7일 간격으로 2회 살포한 결과 처리 7일 후 방제효과는 91.7%로 높았다.

Recently, the occurrence of the fall webworm, one of the foreign invasive pests, is rapidly increasing due to the increase in average annual temperature due to global climate changes. In this study, we are presenting diverse eco-friendly technologies to control the fall webworm. (Grant No. PJ014845032023).

Fall armyworm Spodoptera frugiperda (Lepidoptera: Noctuidae) is a polyphagous agricultural pest that damages about 80 species of plants. It mainly damages Poaceae and plants used as food resources for humans. Its original habitat is the American continent, but it unintentionally settled in tropical and subtropical Asia, including Africa, India, and Sri Lanka. It occurs every year even in southern China, which is geographically adjacent to the Korean Peninsula, causing damage to crops. In Korea, it was first discovered on Jeju Island in June 2019 and is being discovered every year in Jeju and some inland areas. In 2023, there were a total of 13 discoveries, including those in the Jeju and Jeonbuk regions. Quarantine agency identified the maternal genotypes of all currently discovered individuals using COI and identified differences in genetic traits between individuals using the sex-related Z-chromosome. For comparison with the information on the individuals that invaded the country, 15 individuals from Guangxi and Guangdong provinces in China were collected and secured. Through the analysis of overseas samples, a database has been added to compare genetic information with domestic invasive species, and the reliability of the analysis is expected to increase.

The fall armyworm (FAW), Spodoptera frugiperda (Lepidoptera: Noctuidae), which is native to tropical and subtropical regions of the Western Hemisphere is now annually arrives in Korea. In this study, we developed loop-mediated isothermal amplification (LAMP) assay, one of the main merits of which is a rapid identification of target species. Five among 11 FAW-specific loci tested successfully provided a consistent reaction when ten FAWs, which were collected from eight localities in four countries were tested, whereas the 13 non-target species were not amplified. To increase in-field applicability of the method all life stages, reaction time, and different periods after death was tested using the quick extracted DNA. Our FAW diagnostic protocol can be completed within 30 min, from the process of extracting genomic DNA from an egg or a 1st instar larva to species determination.

This study was conducted to determine the appropriate seeding dates by verifying the difference in winter survival and productivity of alfalfa according to fall sowing dates in the central area of South Korea. The experiment was conducted for 2 years (2020 and 2021) at the field in the Department of Animal Resources Development, NIAS located in Cheonan. Sowing dates started from September 18 to November 8 with 10 days of intervals during 2020 and 2021; SO1 (September 18), SO2 (September 28), SO3 (October 8), SO4 (October 18), SO5 (October 28), and SO6 (November 8). After sowing, the winter survival rate was measured in the spring of the following year, and the dry matter yield was measured by harvesting at 10% flowering and harvesting five times a year. SO6 failed to winter survival, and SO5 also had a lower winter survival rate than SO1~4 (p<0.05). The average annual dry matter yield of alfalfa linearly decreased with delaying sowing dates (p<0.05). The feed value did not differ in the same year by delaying the sowing date in the same year. These results suggest that sowing date should be started before October 18 to increase winter survival and productivity of alfalfa in the central area of South Korea.

이 글은 천주교의 민주화 운동을 1960년대부터 2020년까지 정리하고, 천주교 민주화 운동이 천주교 신자 증감에 미친 영향에 관해 연구했다. 우리나라는 군부와 신군부를 거치며 민주화에 대한 열망이 강한 사회였 고, 천주교 또한 민주주의에 대한 시대적 사명을 완수하기 위해 민주화 운동에 참여했다. 대한민국이 민주화 가 된 이후에도 천주교는 민주화운동을 지속해서 실천했다. 이러한 활동이 천주교 신자 증가에 영향을 미치며, 특별한 사건이 있을 때 상대적으로 높은 천주교 신자는 증가할 것이라는 가설을 세우고 함평고구 마 사건과 광주민주화운동의 사례와 관련하여 광주대교구의 신자 증가 문제를 분석했다. 그 결과 이들 지역에서는 천주교의 민주화운동 참여가 유의미한 결과를 도출하고 있음을 밝힐 수 있었다. 또한 천주교는 민주화운동을 통해 쌓은 긍정적 이미지를 유지할 수 있었고, 민주화 이후에도 꾸준한 활동을 보여주어, 인구감소, 타종교인감소 등의 어려움 속에서도 지속적인 신자 증가를 이룰 수 있다고 결론지었다.

Construction industry is considered as one of the most high-risk industries for work-related injuries and fatalities, accounting for more than half of fatalities in Korea. Advanced countries have recognized the critical role of designers in preventing construction accidents and have established regulations on design for safety. In line with this, the Korean government have also implemented regulations that require owners and designers to review the safety of design outcomes. However, it has been observed that designers face challenges in identifying hazards and integrating design solutions at the design stage mainly due to their shortage of required knowledge and skills. This study aimed to examine design solutions that can be applied to prevent fall accidents in the construction industry, and to establish a relationship between these solutions and fatal fall accidents occurred over the past three years in Korea. This study also analyzed the relationships of four variables (construction type, cost, work type, and fall location) with design solutions. The results indicated that all four variables have significant relationships with design solutions, with fall location showing the strongest relationship. The design solutions and their relationships with fatal fall accidents identified in this study can be utilized in identifying hazard and integrating design solutions to ensure design for safety.

Background: While efforts have been made to differentiate fall risk in older adults using wearable devices and clinical methodologies, technologies are still infancy. We applied a decision tree (DT) algorithm using inertial measurement unit (IMU) sensor data and clinical measurements to generate high performance classification models of fall risk of older adults. Objects: This study aims to develop a classification model of fall risk using IMU data and clinical measurements in older adults. Methods: Twenty-six older adults were assessed and categorized into high and low fall risk groups. IMU sensor data were obtained while walking from each group, and features were extracted to be used for a DT algorithm with the Gini index (DT1) and the Entropy index (DT2), which generated classification models to differentiate high and low fall risk groups. Model’s performance was compared and presented with accuracy, sensitivity, and specificity. Results: Accuracy, sensitivity and specificity were 77.8%, 80.0%, and 66.7%, respectively, for DT1; and 72.2%, 91.7%, and 33.3%, respectively, for DT2. Conclusion: Our results suggest that the fall risk classification using IMU sensor data obtained during gait has potentials to be developed for practical use. Different machine learning techniques involving larger data set should be warranted for future research and development.

본 연구는 노인들의 낙상 위험 기전을 이해하고 필라테스 재활 운동 원리가 노인들의 균형 능력 과 자세 안정화에 긍정적 효과를 기대할 수 있는지 선행 연구 자료를 고찰하였고, 재활 필라테스 운동의 낙상 예방 효과에 대한 문헌적 기초자료를 제시하는데 연구의 목적이 있다. 이에 다음과 같은 결론을 제시 하고자 한다. 첫째, 재활 필라테스 운동은 척추와 골반의 안정화를 위한 신체 중심부의 강화 운동이 가능하 고, 신경근을 촉진시켜 균형과 관절 안정화에 효과가 있다. 둘째, 노화에 따른 고유수용기 감각 저하와 근 골격계 퇴행 질환은 균형 능력 상실과 자세 유지의 불안정성을 높여 운동 기능 수행의 어려움과 보행 장애 로 낙상 손상 위험을 높이게 된다. 셋째, 재활 필라테스 운동은 노인들의 코어 근력 향상으로 균형과 반응 시간 운동 기능 향상을 기대할 수 있으며, 낙상 예방에 관여되는 신체 불균형 개선과 움직임 안정성에 긍정 적 영향을 미쳐 낙상 위험률 감소에 기여할 가능성을 제시할 수 있다. 결론적으로 재활 필라테스가 노인운 동 프로그램으로서 신체의 근력 향상, 균형 감각 향상, 코어의 안정화 효과를 나타내 근골격계 퇴행에 따른 낙상 손상의 위험 요인을 감소시키고, 노인성 만성질환에 따른 심각한 활동 장애를 예방할 수 있음을 고찰 하였다.