• Journal of Korean Society of Steel Construction
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• v.14 no.1
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• pp.79-85
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• 2002

Recently, prestressed H-Beam bridges with external unbonded Tendons are increasingly built. The mechanical behavior of prestressed steel H-beams is different from that of normal bonded PSC beams in a point of the slip of tendons at deviators and the change of tendon eccentricity that occurs, when service load are applied in external unbonded steel H-beams. The concept of prestressing steel structures has been widely considered, in spite of long and successful history of prestressing concrete members. In the study, The flexural test on prestressed steel H-beams has been performed in the various aspects of prestressed H-beam including the tendon type and profile. The load was plotted against the deflection and the strain respectively in the steel beam and prestressing bars. The value expected with the equation of internal force equilibrium and compatibility between the deflection of the bars and the H-beam was found to correlate well with the measured data.

• Korean Journal of Clinical Pharmacy
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• v.28 no.1
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• pp.57-64
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• 2018

Background: Patients experience significant differences in aspects of mortality, quality of life, and costs between during the year of receiving liver transplant (LT) and the subsequent years (post-LT). This study aimed to estimate the medical utilization and cost of LT for patients compared to post-LT patients by using a recent National Patient Sample (NPS) data provided by the Korean Health Insurance Review and Assessment Service (HIRA). Methods: This study used a subset of the 2015 HIRA-NPS. Patient claims data that included Z944 (Korean Standard Classification of Diseases code for LT status) were selected. Within the selected data, LT patients were identified based on whether the national health insurance number code of Q80 (procedure code for LT surgery) was included, and they were compared to post-LT patients. Results: In the analysis, 330 patients were included. The average cost per patient was $90,066{\pm}36,959$ thousand KRW and $10,557{\pm}9,668$ thousand KRW for LT and post-LT patients, respectively. Especially, LT patients' costs for injection/procedure, surgery/treatment, and examination were higher than other costs, being $35,983{\pm}18,115$ thousand KRW, $28,246{\pm}9,408$ thousand KRW, and $12,131{\pm}6,604$ thousand KRW, respectively. For inpatients, the average number of hospitalized days was $63.5{\pm}66.0$ days for LT patients and $22.3{\pm}35.1$ days for post-LT patients. Conclusion: Compared to post-LT patients, LT patients had higher costs, especially for injection/procedure, surgery/treatment, and examination. Additionally, the LT group had longer hospitalization duration and higher costs for their hospital admission, whereas they did not show a significant difference in number of visits and medical costs for outpatient-care.

• Journal of Korean Public Health Nursing
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• v.5 no.1
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• pp.70-95
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• 1991

The ageing problem of the population has been emerging in Korea since 1970's so that it is expecting the elderly 65 years and over among the total population from $4.5\%$ in 1988 to be $6.3\%$ in year 2000. This study was conducted to provide secure policy development in coming years for the aged on medical and health care aspects based on the examining current status of the aged problems and health care policies and systems. The study divided into four parts; The first part examined the medical insurance program and public assistance program of the health services in relation to the aged. The second part emphasized on reduction of medical care cost for the aged. The third part studied the regular health check-up program and health education for the aged. The fourth part examined the chronic disease management programs for the aged and strategies of the health care service quality improvement and specialized programs. The following recommendations made as the results of the study. 1. At present, the medical insurance program and public assistance program for the medically indigent is not appropriate to the elderly because it is a part of general medical insurance program so that Health Security Law for the Aged is proposed. 2. Medical cost will be increased due to the high occupancy rate of hospital beds and long stay of the elderly so that it is recommended to develop an early discharge program, home health care program, Health hospice and an althernative programs. 3. At present, a regular health check-ups for the elderly is not included in medical insurance program so that it is recommended to be included in the insurance program and at the same time health education program thoroughly developed for the aged. 4. To make proper medical and nursing services on chronic diseases for the elderly, it is recommended manpower development, specialized clinics or hospitals, nursing homes and an equivalent long term care facilitices should be established on the community based and a research institutions also to be related to supper the care programs.

• KCI Concrete Journal
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• v.13 no.1
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• pp.43-51
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• 2001

Although portland cement concrete is one of the most universal construction materials, it has some disadvantage such as shrinkage, which is an inherent characteristic. Because of this shrinkage, combined with the low tensile strength of the material, cracks of varying sizes can be found in every reinforced concrete. To prevent this cracking, keeping the concrete in compression by mechanical prestress has been used. This study discusses application of expansive additives for concrete to improve the serviceability of precast concrete box culvert by inducing chemical prestress. For this purpose, both expansive concrete slabs and normal concrete slabs are tested to verify the effect of expansive additives. Then the failure tests of the fullscale precast box culverts were carried out and the critical aspects of the structural behavior were investigated. The result of the material testis shows that the optimal proportion of expansive additives is 13 percent of cement weight, and the properties of expansive concrete are the same as those of normal concrete in that proportion. Both the experimental cracking load and service load of the expansive concrete members are increased in comparison with those of the normal concrete, but the ultimate load is decreased slightly. In addition to the above results, the deformation of expansive concrete member is lets than that of normal concrete member, and permanent strain which results from cyclic load is decreased. It can be concluded that the use of expansive additives to induce chemical prestress in precast concrete box culvert greatly improves the serviceability.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.16 no.1
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• pp.177-182
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• 2016

Geofence is a generic concept for describing geographic aspects of PoI(Point of Interest) enabling users to proactively induce context-based actions. However there is no need to maintain continuity when you reflect geofence in case of temporary events, accidents and isolation. Therefore we propose a geofence platform so-called TemG by adding time-limited information to support PoI. The proposed geofence platform TemG ensures the persistency and continuity of geofence. Furthermore, the proposed TemG can not only provide to automatically activate or deactivate the specified geofence during a period of timestamp but also support to the basic context-aware service knowing in/out in the zone. In the near future, the proposed TemG will be need to extend HPS(Hybrid Positioning System) for IoT(Internet of Things).

• Convergence Security Journal
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• v.7 no.3
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• pp.1-6
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• 2007

It is important to manage and correctly evaluate the performance of server in order to improve he performance of server. That is, with the aim of finding whether resources are properly utilized, it is a method to improve both software and hardware aspects. Conventional method in evaluating the server performance involved installing software between server and client and generating the load and by simulating the process, it evaluated the handing efficiency of work load generated per packet volume. Therefore, this paper aims to pro-vide precise measurement method by distinguishing the characteristics of web server and the users' usage pattern and by evaluating the work load management through applying various standards. Specially, it presents the evaluation method from web service of personal and business.

• Journal of The Korea Institute of Healthcare Architecture
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• v.16 no.1
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• pp.7-16
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• 2010

The cultural assets of the palaces royal tombs remains institution expanded the convenient facilities for the disabled that can help the disabled to watch, to propel the convenient facility expanding business according to the condition of each facility. However, there has been limitations for the disabled facility users in viewing the cultural assets, as the facilities were not installed or were not installed properly. Due to the uniform installation of the convenient facilities that did not consider the features of the cultural assets, the conservation value of the cultural assets have been depreciated and the convenient use standards of the facility users such as the disabled were simultaneously unsatisfactory. Thus, this study maintains the pre-existing value of the palaces royal tombs remains institution that is the Korean indigenous traditional heritage, and uses a part of the improvement model development study on the palaces royal tombs remains institution of the disabled convenience enhancement to understand the current convenient facility installation and relevant services to find the restricted factors in using the facilities and the main problems. The problems were categorized into 13 types of questions, using the repeated problems occurred within the investigated facilities to look at the actual condition of the facilities, which showed that the facilities were in adequate in the aspects of convenient facility installation and relevant service.

• Journal of the Korean Society of Safety
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• v.32 no.5
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• pp.41-46
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• 2017

The coefficient of derailment and the rate of wheel load reduction were used as the index of train running safety that was directly affected the train derailment safety. In aspects of track, the train running safety depends on the complex interaction between wheel and rail, and the track-vehicle conditions (i.e., the curvature, cant, track system, vehicle speed and the operation conditions, etc). In this study, the relationship between the train running safety and the track curvature and vehicle speed for direct fixation concrete tracks currently employed in Korean light rapid transit was assessed by performing field tests using actual vehicles running along the service lines. The measured dynamic wheel load, lateral wheel load and lateral displacement of rail head were measured for same train running on four tested tracks under real conditions, which included curved and tangent tracks placed on the tunnel and bridge, thus increasing the train speed by approximately maximum design speed of each test site. Therefore, the measured dynamic track response was applied to the running safety analysis in order to evaluate the coefficient of derailment, the rate of wheel load reduction and the track gauge widening at each test site, and compare with the corresponding Korean train running safety standard. As the results, the lateral track response of direct fixation concrete track appeared to increase with the decreased track curvature; therefore, it was inferred that the track curvature directly affected the train running safety.

• The Research Journal of the Costume Culture
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• v.15 no.1 s.66
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• pp.25-36
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• 2007

As the materials being used in children's clothing become diverse, the number of reported problems related to various aspects of washing and wearing is increasing. Many customers experience great dissatisfaction when using these children's garments due to their lack of professional knowledge in washing, fabric, and detergents. Thus, this paper focuses on various cases in which housewives have experienced product damage after washing their children's garments according the prescribed directions. Of particular interest is how the consumers respond to such damage in garments and how their experiences with garment damage affect the sellers of these garments. A total of 292 housewives with children less than 8 years old living in Seoul responded to our survey, out of which 83 reported to have suffered negative consequences. By analyzing the 83 responses, the following results were found: First, the problems reported by the housewives in regards to washing children's garments were mostly related to the durability or color change problems. Secondly, the most favored means of response to garment damage were 'complaining directly to the seller' (16.7%) and 'complaining at the customer service department of the manufacturer or seller' (13.5%). Thirdly, among the actions they requested to the seller/manufacturer, 'ask for an exchange' marked the highest. Lastly, respondents admitted that their experiences with garment damage as well as the attitude or response of the manufacturer/retailer to their complaints would influence their repurchase intention.

• Journal of Digital Convergence
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• v.18 no.2
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• pp.333-342
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• 2020

The purpose of this study was to identify factors influencing elderly care burden of a working family. Methods: A descriptive correlational design was used. Participants was 153 family member of elderly at five nursing facilities. Data were collected through self-reported questionnaires from July to October 2019. Data were analyzed using an independent t-test, one-way ANOVA, Pearson's correlation, and hierarchical multiple regression analysis with the SPSS WIN 25.0 program. Analysis result, explaining 20,8% of the variance, which indicated that subjects for giving care, monthly admission fee, burden of expenses, and satisfaction for fee service were significant predictors of working family's care burden. Various individual characteristics significantly influenced working family's care burden in aspects of emotional, social, economical, and physical burdens. Therefore, interventions to decrease working family's care burden must focus on their individual factors.