• Journal of Korean Society of Rural Planning
• /
• v.18 no.4
• /
• pp.69-78
• /
• 2012

Korean population has been rapidly aging. Most of people regard the aging population as future crisis due to the rate of change and agree to prepare for a soft-landing on aging society in South Korea. Particularly, the aging population growth in rural areas is much faster than urban areas. Also rural areas relatively have poorer social and economic conditions so the countermeasures for population aging considering related social and economic indices are required. Moreover, each rural region has the different preparedness level for rural aging based on regional socio-economic characteristics. In this study, we analyzed correlations of the rural aging rate and local characteristics and developed an evaluation index to show the regional preparedness status for rural aging. To test the applicability of developed indicators, we applied them to 161 rural regions and assessed regional preparedness level for rural aging. This study would provide basic data for establishing policies for rural aging.

• Korean Journal of Agricultural Science
• /
• v.45 no.1
• /
• pp.120-127
• /
• 2018

The rural labor force has gradually been decreasing due to the decrement of the farm population and the increment of the aging population. To solve these problems, it is necessary to develop and study autonomous agricultural machinery. Therefore, analyzing the dynamic behavior of vehicles in an autonomous agricultural environment is important. Until now, most studies on agricultural machinery, especially on ground vehicle dynamics, have been done by field tests. However, these field test methods are time consuming and costly with seasonal restrictions. A research method that can replace existing field test methods by using simulations is needed. In this study, we did basic research analyzing the effect of the travelling speed of a tractor on tire slip using simulation software. A tractor simulation model was developed based on field conditions following a straight path. The simulation was done for three ranges of speed: 20 - 30 km/h (considered the normal travelling speed range), 6 - 8 km/h (considered the plow tillage speed range) and 2 - 4 km/h (considered the rotary tillage speed range). The results of the simulation show that the slip ratio and slip angle values tended to increase as the traveling speed range of the tractor decreased. From the simulation results, it can be concluded that at low tractor speeds, it becomes more difficult to control the vehicle path. In future research, simulations will be done with various work environments such as a curved path as well as with various friction coefficient conditions, and the simulation results will be experimentally verified by applying them to an agricultural tractor.

• Journal of rehabilitation welfare engineering & assistive technology
• /
• v.11 no.4
• /
• pp.355-361
• /
• 2017

This paper is the design for the welfare robot of apple artificial pollination by a survey for 25 elders' needs of Daegu-Gyeongbuk rural region. The results are summarized as follows. 1) In the apple farms of the region, most of farmers are the couples of 50 years thru 70 years to plant the apple trees only. The apple farm requires the senior farmers lots of painful works including their bone and muscle system problem to result in safety accidents. 2) For the aging progress of rural area, the senior farmers spend lots of labor hours and cost to do artificial pollination, a proper deletion of small fruits, and a speed spray, etc.. Most of them agree to the development of the welfare robot for an apple artificial pollination. 3) The survey results could be applied to the conceptual design in the users' point of view. Therefore, they are used as the important effects for the detail design and commercial design to develop the welfare robot for the rural seniors.

• Journal of the Korean Institute of Rural Architecture
• /
• v.21 no.4
• /
• pp.45-52
• /
• 2019

Chemical grouting method is mainly used for construction of dams and reservoirs, stabilization and reinforcement of slopes, reinforcement of soft grounds such as embankments, dredging and landfills, the order of earthquake response method, and the reinforcement of structures. Recently, it is widely applied in construction sites such as highways, airfields, high-speed railways, subsea facilities, port construction works, tunnels, and subway works. As such, the demand for grouting continues to increase. The development of the grouting method was focused on increasing the strength of the ground, and the development of the chemical additives, the injection device, and the stirring device were mainly performed. But ordinary portland cement used for grouting is a product that consumes natural resources such as limestone, generates a large amount of greenhouse gases, consumes a large amount of energy sources, and it is time to develop products and new methods to replace them. In this study, Ordinary Portland Cement and New Grouting Binder (circulating fluidized bed boiler fly and blast furnace slag) were compared and analyzed by the following test. Homo-gel strength and homo-gel time, water quality analysis of the water used and soil contamination process tests of homo-gel samples were performed. In the case of NGB, when Using water is used as the reservoir water, the strength measured smaller than that of the other water. However, it shows about 2.5 times greater than the homo-gel compressive strength applied to OPC (7-day, reservoir water), so there is no problem with water quality when applied.

• Journal of Korean Society of Transportation
• /
• v.28 no.5
• /
• pp.155-162
• /
• 2010

Elderly pedestrians account for more than 30% of all deaths in traffic accident and the number of elderly-related traffic accidents are increasing every year. Considering Korea's quickly aging society, drastic measures must henceforth be taken. Taking notice of the elderly living in and moving around the provinces, this research focused on analyzing the characteristics of elderly pedistrians' traffic accidents on provincial roads and developing an Equivalent Property Damage Only (EPDO) model. The authors collected 720 traffic accident data points from the police agency and developed the EPDO model, weighted differently by light injury, severe injury, and death using Multiple Regression Analysis. As a result, the speed of vehicles is the most influential variable in EPDO, and the shape of the road is significant as well. Therefore, various policies should be established like improving the environmental factors of provincial roads, like expanding speed-reduction treatments and signage, and setting up detours around areas of high elderly concentration.

• Korean Journal of Social Welfare
• /
• v.55
• /
• pp.283-307
• /
• 2003

The social services for the elderly have been expending in order to respond to the rapid speed of aging. However, low utilization, exclusion and duplication have been pointed out as significant problems in service utilization of the elderly. This study tried to find out the utilization patterns of social services for the elderly: what kinds of and how many social services the elderly receive from what kinds of and how many organizations, and factors influencing utilization of the social services. It surveyed the entire population of the public assistance recipient elderlies at Kyonggi province in 1999. The results show that duplication is not so significant problem as the low utilization of social services. However, the fact that more than forty five percent of the elderly receives social services from more than two organizations requires the efforts for service linkage and coordination in social service delivery system. The factors, which have relatively big influence on the number of organizations which the elderly use for each social service, were sex and age among the predisposing factors, "living alone" and place for residency among the enabling factors and the number of illness, Activities of Daily Living, Instrumental Activities of Daily Living and inconvenience of housing among the needs factors. These results call for expansion of social services for the elderly especially in the way of achieving distribution balance between the rural and urban area and activation of case management practice and local association of social service delivery agencies for service linkage and coordination.

• The Journal of the Convergence on Culture Technology
• /
• v.10 no.2
• /
• pp.531-536
• /
• 2024

Control drones, which are recently classified as smart agricultural machines in the agricultural field, are striving to build smart control and automatic control systems by combining hardware and software in order to shorten working hours and increase the effectiveness of control in the aging era of rural areas. In this paper, the characteristics of the nozzle dedicated to the control drone were analyzed as a basic study for the establishment of management control and automatic control systems. In order to consider various variables such as the type of various drone models, controller, wind, flight speed, flight altitude, weather conditions, and UAV pesticide types, related studies are needed to be able to present the drug spraying criteria in consideration of the characteristics and versatility of the nozzle. Therefore, to enable the consideration of various variables, flow analysis (CFD) simulation was conducted based on the self-designed nozzle, and the theoretical and experimental values of the droplet distribution were compared and analyzed through water reduction experiments. In the future, we intend to calculate accurate scattering in consideration of various variables according to drone operation and use it in management control and automatic control systems.