• Journal of The Korean Society of Agricultural Engineers
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• v.63 no.1
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• pp.11-25
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• 2021

The objective of this study was to analyze the impact of activation functions on flood forecasting model based on Artificial neural networks (ANNs). The traditional activation functions, the sigmoid and tanh functions, were compared with the functions which have been recently recommended for deep neural networks; the ReLU, leaky ReLU, and ELU functions. The flood forecasting model based on ANNs was designed to predict real-time runoff for 1 to 6-h lead time using the rainfall and runoff data of the past nine hours. The statistical measures such as R2, Nash-Sutcliffe Efficiency (NSE), Root Mean Squared Error (RMSE), the error of peak time (ETp), and the error of peak discharge (EQp) were used to evaluate the model accuracy. The tanh and ELU functions were most accurate with R2=0.97 and RMSE=30.1 (㎥/s) for 1-h lead time and R2=0.56 and RMSE=124.6~124.8 (㎥/s) for 6-h lead time. We also evaluated the learning speed by using the number of epochs that minimizes errors. The sigmoid function had the slowest learning speed due to the 'vanishing gradient problem' and the limited direction of weight update. The learning speed of the ELU function was 1.2 times faster than the tanh function. As a result, the ELU function most effectively improved the accuracy and speed of the ANNs model, so it was determined to be the best activation function for ANNs-based flood forecasting.

• Journal of the Korean Institute of Rural Architecture
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• v.9 no.2
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• pp.13-20
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• 2007

This study examined the present condition and characteristics, spatial composition of the Atarasimura through field studies about the Atarasimura of Miyashiro, Saitama pref. in Japan. The results of this study are as follows. First, Atarasimura is the citizen farm of Miyashiro which promotes regional activation, community consciousness and the interchange of residents. Second, cultivation area and the miscellaneous scrub transforms the area into a park-like one, protecting a natural environment and making a beautiful landscape. Atarasimura is expected to enhance the studying effect of the children and young people. Third, the direct sale of agricultural products leads to the increase of income and resident employment opportunities. Fourth, the plan of future regional facilities must be made within a legal system and a systematic program for region making. In addition, the system of rational participation and cooperation between administration and local residents is important.

• Journal of Agricultural Extension & Community Development
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• v.11 no.1
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• pp.95-110
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• 2004

The purposes of this study were to analyze rural youth's leisure activity and to suggest measures for activation. This study was conducted by review of literature and questionnaire, The data was collected from 1,209 stratified cluster random sampled rural youth who are in middle school and high school. To analyze the data, SPSS/WIN program was employed. The major finding of the study were as follows: 1) About 30% of rural youths had less than 1-2 hours for leisure activity in daily life and more than 8 hours for leisure activity during the weekend, and over 40% of rural youths had no plan for leisure activity. 1) They recognized that leisure activity made them enjoy common life, decrease their stress, and get new experience far self-development, 3) participation in sports, organized-activity and self-directed activity of the middle schools youths were higher compare to youths in high schools, 4) to activate leisure life, rural youths expected to get a) direct support for participating leisure activity expenses(27%), b) develop and diffusion of diverse and interesting leisure programs(23%), and c) securing appropriate leisure facilities(22%).

• Journal of Korean Society of Rural Planning
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• v.26 no.2
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• pp.83-93
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• 2020

Rural areas have been faced with various problems such as aging and population decline, and in these circumstances, the activation of local communities is suggested as a solution. Agricultural producer organizations are a powerful means of maintaining rural society. The purpose of this study is to understand the characteristics of agricultural community activities by region by comparing the status of organization and activities and analyzing Location Quotient(LQ) based on the regional survey data in the 2015 census of agriculture, forestry, and fisheries. As the results of the analysis, it was found that 38.35% of villages participated in economic organizations and 32.22% of villages were having urban-rural exchange activities. The crop clubs were actively operated in the Gyeongsangbuk province, and other economic organizations were organized in Jeju, Haenam-gun, and Dangjin-si more than other regions. And the urban-rural exchange activities were found in Chungcheongnam province mainly. The results of detailed LQ analysis by organization and activity showed that specialized regions for each community or activity were different. These results could be used for regional planning or the establishment of strategies for community activation.

• International Journal of Industrial Entomology and Biomaterials
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• v.48 no.1
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• pp.13-18
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• 2024

The rice field grasshopper, Oxya chinensis sinuosa (OC), has traditionally been utilized in Korea for various purposes; however, its potential benefits in the context of osteoporosis remain unclear. The results revealed that OC ethanol extract (OCE) significantly inhibited the formation and activity of tartrate-resistant acid phosphatase (TRAP)-positive cells in receptor activator of nuclear factor-κB ligand (RANKL)-stimulated RAW264.7 cells. Furthermore, OCE, at concentrations ranging from 100 to 400 ㎍/mL, demonstrated a dose-dependent reduction in the protein expression of osteoclast-specific markers, including nuclear factor of activated T cell cytoplasmic 1, c-Src, and TRAP, when compared to RANKL stimulation alone. Additionally, OCE significantly inhibited RANKL-induced activation of p38 mitogen-activated protein kinase (MAPK) and c-Jun N-terminal kinase (JNK) but not the activation of extracellular signal-regulated kinase. Collectively, these results indicate that OCE suppresses osteoclastogenesis by attenuating the phosphorylation of p38 MAPK and JNK. Consequently, these findings suggest that OCE holds promise for the prevention of osteoporosis.

• Food Science of Animal Resources
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• v.44 no.4
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• pp.966-966
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• 2024

• Journal of the Korean Institute of Rural Architecture
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• v.3 no.1
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• pp.79-90
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• 2001

This report is that the scenery of the town with a different measure is different. There are the framework and the story in the rural communities master plan . This master plan's story intends the self-help and living with meaning of citizens in own city and town. It is the philosophy of the master plan that citizens' daily bread is the local resourses, lives in safety and keeps the healthy living. But these contents are the different means by the condition of each cities' and towns' geography. The scenery of introducing two towns appears to each different plan by different conditions.

• Journal of the Korean Institute of Rural Architecture
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• v.12 no.2
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• pp.59-66
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• 2010

The idyllic housing is dreamed by citizens today. The government has promoted the rural activation and satisfied citizen's needs about idyllic housing through the advanced rural village development project. Jecheon city aims to develop idyllic housing area in Baegun. This study investigated the resident' consciousness and actual conditions of idyllic housing in Baegun by field study. The aim of this study is to suggest data of idyllic housing policy by analysis idyllic housing of actual condition and resident' consciousness of demands. The idyllic housing of resident is aged sixty five or more from Seoul and Gyeonggi-do. Second, they want to be maintenance of life convenience facilities, improvement of traffic, necessity of medical institution. Third, it is necessity of variety program to solve conflicts between residents and immigrants and to make community of residents.

• Journal of the Korean Institute of Rural Architecture
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• v.17 no.1
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• pp.35-44
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• 2015

This study is regarding Rural village renovation project that improve the poor residential environment of backward rural district in Korea and the quality of life of the rural area residents. Especially, by comparing the Kyungbuk, Yeungju, Juchi village's case which was progressed by MAFRA (Ministry of Agriculture, Food and Rural Affairs) in 2014 for the demonstration project with the successful case MELAP(Model project on the Effective Utilization of Rural Land through the activation of internal potential element) which is one of the Rural area Development Program in German Federal Ministry of Baden-$W{\ddot{u}}rttemberg$, this essay attempts to suggest the improvement Plan of Rural village renovation project which will be developed forward.

• Korean Journal of Organic Agriculture
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• v.30 no.1
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• pp.51-74
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• 2022

This study aimed to identify a difference in project implementation between villages that had executed rural village community activation support work successfully and those that had quit in the middle from the new endogenous development theory perspective. As a result, it was found that the main factors used for promoting to increase endogeneous development capabilities existed more in villages that executed project implementation support work successfully than in villages that had quit in the middle. Successful villages have a difference from the villages that had quit in the middle in that they have established a participatory decision making and cooperation system for stable operation even before their support work began, they have more assets for promoting community activity, residents' interaction and communal activity are becoming more active, and reciprocity-based mutual aid culture exists in many forms. In conclusion, seeing from the new endogenous development theory perspective, villages are developed under the interaction between internal and external factors, but the outcome of project implementation depends on whether village community holds its endogenous development capability to operate and develop such whole process of development. Therefore, village community activation policies need to be reinforced in the direction toward promoting to create the main factors for enhancing endogenous development capabilities.