• The Journal of the Korea Contents Association
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• v.19 no.8
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• pp.525-534
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• 2019

Korea is facing one of the fastest aging population problems in the world due to the extension of life expectancy and low birth rates due to economic development and the development of health care. It has become difficult to take care of elderly people in need of long-term care at home, and social problems such as dementia and the increase in stroke cases are serious problems. The government is enacting and implementing the Long-Term Care Insurance Act for the purpose of improving the quality of life for senior citizens subject to long-term care and alleviating the burden of family support in order to solve such social structure and problems for senior citizens. However, as a result of the implementation of the long-term care insurance system for the elderly, the privatization of the facilities and the disorder are causing widespread requests for public accountability of the services and the enhancement of the quality of the facilities. In addition, various arrangements are needed for the production of low-wage medical care workers, tasks for quality improvement, problems regarding financing methods, and so on. In order to maintain and develop the long-term care insurance system for the elderly, the government will consider seeking ways to improve the legal and institutional aspects according to changes in the social environment of the age, as well as seeking mental and psychological measures for the stabilization of old life as well as physical health.

• Journal of Korea Water Resources Association
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• v.57 no.2
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• pp.127-137
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• 2024

Physical models, which are often used for water resource management, are difficult to build and operate with input data and may involve the subjective views of users. In recent years, research using data-driven models such as machine learning has been actively conducted to compensate for these problems in the field of water resources, and in this study, an artificial neural network was used to simulate long-term rainfall runoff in the Osipcheon watershed in Samcheok-si, Gangwon-do. For this purpose, three input data groups (meteorological observations, daily precipitation and potential evapotranspiration, and daily precipitation - potential evapotranspiration) were constructed from meteorological data, and the results of training the LSTM (Long Short-term Memory) artificial neural network model were compared and analyzed. As a result, the performance of LSTM-Model 1 using only meteorological observations was the highest, and six LSTM-MLP ensemble models with MLP artificial neural networks were built to simulate long-term runoff in the Fifty Thousand Watershed. The comparison between the LSTM and LSTM-MLP models showed that both models had generally similar results, but the MAE, MSE, and RMSE of LSTM-MLP were reduced compared to LSTM, especially in the low-flow part. As the results of LSTM-MLP show an improvement in the low-flow part, it is judged that in the future, in addition to the LSTM-MLP model, various ensemble models such as CNN can be used to build physical models and create sulfur curves in large basins that take a long time to run and unmeasured basins that lack input data.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.14 no.4
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• pp.741-749
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• 1994

The purpose of the present study is to propose a realistic method to analyze the prestressed concrete members subjected to long term torsional loading. The present study devises a method to realistically take into account the tensile stiffness of concrete after cracking. The effects of biaxial compressive and tensile loadings on the compressive and tensile strengths of concrete are also taken into account in the present model. The salient feature of the present study lies in the fact that the cracking, creep, and shrinkage behavior of concrete and the relaxation of steel have been realistically considered. The comparison of the present theory with experimental data indicates that the proposed model dipicts reasonably well the actual behavior of prestressed concrete members under long-term torsional loadings.

• Transactions of the Korean Society of Mechanical Engineers A
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• v.24 no.2 s.173
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• pp.329-337
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• 2000

An investigation has been performed to develop an analysis tool based on a nonlinear beam theory, which can be used to predict the long-term behavior of an artificial hip joint. The nonlinear behav ior of the femur arise from the coupled dependence of the bone density and the mechanical properties on each other. The beam theory together with its numerical algorithm is developed to take into account the nonlinear bone remodeling process of the femur that is long enough to be assumed as a beam. A piecewise linear curve for the bone remodeling rate is used in the bone remodeling theory and the surface area density of bone is modeled as the third order polynomial function of bone density. At each section of the beam, a constant curvature is assumed and the longitudinal strains are also assumed to vary linearly across the section. The Newton-Rhapson iteration method is used to solve the nonlinear equations for each cross section of the bone and a backward method is used to march along the time. The density and the remodeling signal ar, calculated along with time for the various time steps, and the developed beam theory has been verified by comparing with the results of finite element analysis of a remodeling bone with an artificial hip joint of titanium prosthesis subjected to uni-axial loads and pure bending moment. It is concluded that the developed beam theory can be used to predict the long-term behavior of the femur and thus to design the artificial hip prosthesis.

• Journal of the Korean Society of Safety
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• v.29 no.6
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• pp.125-131
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• 2014

The purpose of this study is to investigate the effect of high quality CPR using the 4 types of rescue device equipment and chest compressions energy measurement in pre-hospital settings. So, we used the mode to insert load cell in ALS Skill master Manikin to develop CFMM(Compression Force Measurement Manikin) on main stretcher, CPR board, long spine board, scoop stretcher and floor. And, our research team could know that the main stretcher needed average force of 32.55 (${\pm}1.01$) kg, CPR board of 27.23 (${\pm}1.08$) kg, long spine board of 27.13 (${\pm}1.18$) kg, Scoop Stretcher of 27.38 (${\pm}1.05$) kg and Floor of 27.24 (${\pm}0.93$) kg. CPR board must be necessary in the case of CPR on main stretcher in a moving ambulance. But if the condition of patient's back surface is the removable stretcher and the long spine plate, the patient doesn't have to be spent time to use a CPR board. Furthermore, this research suggests to consider that how to take advantage of the education to students for the equipment to check in real time the energy(kg) requirement of chest compressions.

• KIEAE Journal
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• v.14 no.2
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• pp.69-75
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• 2014

Building has been deteriorated over the year after construction. The deterioration has caused to hinder the living condition and to decrease the building value. Thus, it is important to prevent or delay the building deterioration as well as to proceed the maintenance. The long-term repair program for the apartment in Korea plays a key role to make the repair plan after construction and to assure the function decent. This is not flexible to the change of the material and component because the program is provided by the Korean-law. Many items are omitted in the long-term program so that the maintenance experts face many difficulties to make a repair plan. In this paper, it aimed at providing the repair cycle and repair ratio according to the repair scope, which are not provided in the current program. This study shows that the repair ratio is presented with quartile range in 25%, 50%, 75% and 100%. This has an advantage to take an overall look in repair items. Under this presentation of the repair ratio, each item has a unique repair value. Second, the repair scope is divided into partly repair, fully repair, partly alteration and fully alteration. If a fully repair has a repair ratio close to 100%, it would mean that a fully repair is a fully alteration. Third, the short repair cycle means that it requires to maintain the function or performance of the components in a short term.

• Journal of Physiology & Pathology in Korean Medicine
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• v.20 no.2
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• pp.494-497
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• 2006

A child with five delay, five ankylosis, five weakening needs to take herbal medicine for a long term. So safety, efficacy inspection for the long term usage of herbal medicine and mixed dose is needed because other medication or functional health foods, etc could be taken during this process. Operated liver function test before and after dosing herbal medicine to one hundred and sixty children who aided private oriental medicine located in Seoul, and measured the efficacy by comparing sleeping hours, morbidity, stamina, sanguineness, personality, digestion with the state before taking herbal medicine based on questionnaire done by the parents. Every children were under the limits, and there were no differences between boys and girls, and no notable differences according to family histories. There were positive results in efficacy inspection ordered as improvement in personality, stamina, sanguineness, decrease in morbidity, increase in appetite, digestion. No signs of disorder in liver function has been found during the dose of herbal medicine or simultaneous medicine, and shown promotion of health.

• Journal of Energy Engineering
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• v.21 no.3
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• pp.301-308
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• 2012

This paper attempts to estimate the demand function for the transport LPG and to analyze long-run and short-run price and income elasticities. In addition, the paper measures consumer surplus and economic value ensuing from the transport LPG consumption by utilizing the estimated long-run price elasticity. The price and the income data are the monthly real transport LPG price and the monthly composite index adjusted by real transport LPG price from 2003 to 2012. Unit root test, co-integration test and error correction model are to take the procedure of estimation of demand curve. The demand for transport LPG is considered to be inelastic and the long-run demand is more elasticity than that of short-run. Price elasticity of demand estimate here is -0.422, and the estimated consumer surplus and economic value in 2010/03 are 966 and 1,781 billion won, respectively.

• Journal of Korean society of Dental Hygiene
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• v.20 no.4
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• pp.457-467
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• 2020

Objectives: This study confirms the current status of visiting oral health-care services for the elderly to draw policy implications for revitalization of the visiting oral health care services in the future. Methods: First, a survey was conducted on health centers about the current status of the elderly visiting oral health-care service and how to revitalize it. Next, the number of oral hygiene services provided to the elderly was checked in the long-term care insurance system. Results: Oral health education (100%) was the most common practice in visiting oral health-care service for the elderly, and the most difficult thing in providing services was the lack of dental hygienists (38.9%). The status of oral health-care services in the long-term care insurance system for elderly revealed that the total number of service claims has been confirmed to be zero since the introduction of the system. Conclusions: Despite the existence of a system that provides elderly visiting oral healthcare services, to revitalize it, the law must be amended to secure a dental hygienist as the main agent of the activity and to further take responsibility for autonomous authority and performance.

• Smart Structures and Systems
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• v.25 no.1
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• pp.23-35
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• 2020

It is important to take into account the thermal behavior in assessing the structural condition of bridges. An effective method of studying the temperature effect of long-span bridges is numerical simulation based on the solar radiation models. This study aims to develop a time-varying solar radiation model which can consider the real-time weather changes, such as a cloud cover. A statistical analysis of the long-term monitoring data is first performed, especially on the temperature data between the south and north anchors of the bridge, to confirm that temperature difference can be used to describe real-time weather changes. Second, a defect in the traditional solar radiation model is detected in the temperature field simulation, whereby the value of the turbidity coefficient t_u is subjective and cannot be used to describe the weather changes in real-time. Therefore, a new solar radiation model with modified turbidity coefficient γ is first established on the temperature difference between the south and north anchors. Third, the temperature data of several days are selected for model validation, with the results showing that the simulated temperature distribution is in good agreement with the measured temperature, while the calculated results by the traditional model had minor errors because the turbidity coefficient t_u is uncertainty. In addition, the vertical and transverse temperature gradient of a typical cross-section and the temperature distribution of the tower are also studied.