The Society of Convergence Knowledge Transactions ISSN:2287-8920(Print) 융복합지식학회논문지

Recently, flood damage has been increasing due to the occurrence of rainfall exceeding the design frequency of flood protection facilities such as localized torrential rain. Among them, inland flood damage in urban areas accounts for more than 50% of the total damage. The increase in localized torrential rainfall increases the amount of runoff to rivers and lowlands. Flooding damage is increasing as rainwater is not discharged immediately due to deterioration of rainwater conduits and lack of water permeability. The main causes of flood damage are low-lying areas, lack of water permeability of rainwater conduits, insufficient capacity of pumping stations, and sedimentation of conduits. Therefore, it is necessary to apply a new type of rainwater storage facility that does not require a large-scale site such as an underground storage tank and does not require a large budget. Considering that the damage caused by inland water inundation is increasing in the case of downtown areas, it is possible to reduce the economic damage by improving the flood control capacity of the flood-prone area by establishing the road surface water storage system in connection with the drainage pipe. In order to build a road surface water storage system, an information system and model that can be linked with on-site RFID sensing data is required. By analyzing field data collected by sensing, it is possible to grasp the state of the storage system and the amount of storage in real time. Therefore, this study proposes an ‘information model for RFID sensor-based gutter reservoir operation’ for efficient management of gutter reservoir system and interoperability-based RFID sensor-based gutter reservoir operation.

In order to use vanadium redox flow battery separator, we synthesized a cation exchange membrane by atom transfer radical graft polymerization. Poly(vinyl chloride) which is known as a general plastic materials, was used as the main chain polymer of the cation exchange membrane. The poly(vinyl chloride) is grafted by atom transfer radical graft polymerization of 4-styrene sulfonate with sulfonate group (-SO₃Na) to give poly(vinyl chloride)-g-poly(styrene sulfonate), PVC-g-PSS. The cation exchange membrane was fabricated by hand casting of the solution after dissolving N-methyl-2-pyrrolidone of PVC-g-PSS. The obtained cation exchange membranes were characterized by water adsorption ratio, expansion ratio, ion conductivity, ion exchange capacity, vanadium permeability, and tensile strength for using separator of vanadium redox flow battery. The vanadium redox flow battery system with PVC-g-PSS separator during charging and discharging with 1,000 cycles had very higher stability. From these results, the synthesized cation exchange membrane could be used as separator in vanadium redox flow battery system.

This paper proposes a service using a food pen as an art therapy materials in art therapy used for the prevention and improvement of dementia. There is no cure for dementia, so prevention and alleviation are the only alternatives, but art therapy is generally used because of its accessibility and ease of use. Art therapy service is an analog face-to-face service, and it is pointed out that there is a limit to generalization and objectification because analysis depends on art therapy experts. Recently, various attempts are being made through convergence with digital. In other words, various analyzes and advancements are being made using digital characteristics such as homeostasis, transformability, compatibility, and reproducibility. Therefore, this study proposes a service that applies the food pen as an analog-digital art therapy materials in line with the advancement of dementia-related services. To this end, the effects of art therapy on dementia were identified from previous studies, and the advanced trends related to dementia were systematically analyzed. Based on this, the research questions on how to apply and analyze the food pen, a digital-analog fusion device as an art therapy medium, were pointed out and the differentiation from the existing art therapy media was analyzed.

Water Cut Meter is an equipment that measures the ratio of water flow among crude oil components flowing through pipelines at an oil production site. The rise of unconventional energies has led to an increase in oil sand production, which requires a higher degree of accuracy in the proportion of water in the production fluid. Industry utilizes Multiphase Flow Loops to establish the performance accuracy of flow meters and Water Cut Meters prior to field deployment. Countries with such facilities include the United States and the United Kingdom, but there is currently no national water cut meter calibration institute in South Korea. In this study, water cut measurement experiment and computational fluid analysis (CFD) were performed by configuring a water cut meter calibration system. As a result of experiments and CFD, in Case 1 (Water:Oil=1:1), the concentration of oil was higher than that of water compared to the ratio of water and oil injected into the test tank, whereas Case 3 (Water:Oil=3:1) showed a lower oil concentration, so the volume fraction of water and oil was different from the initial input ratio. Through this study, it was confirmed that the Water Cut Meter calibration system should be configured on the premise that the flow properties in the pipeline are different depending on the ratio of water and oil components.

This study is an empirical study that analyzes how Western-Korean medical cooperation is being performed in Korea, based on health insurance requests data, while efforts for convergence and cooperation between western and traditional Korean medicine are being actively developed. A comparative analysis was performed with non-cooperative patients, focusing on a total of 12,430 patients using cooperative services. As a result of the analysis, the proportion of total consultation insurance requests was low at 4.14%, but by type of medical institution, the clinic level was 22.7%, and by disease (Large Classification of Diseases) subject to cooperative consultation, neurological disease was the highest at 7.3%. Also, in the results of comparison with the non-cooperative group, it was analyzed that males rather than females, and those who used medical services for less than 10 days preferred cooperative consultations. In the future, it will be necessary to continuously check the performance in terms of improving the quality of treatment and medical service through cooperation between Western-Korean medicine. This could be an important basis for the transition to the paradigm of ‘mutual convergence and mutual cooperation’.

The existing coastal surveillance system is controlled and operated separately by installing the radar and optical equipment separately and fixedly. However, there is a problem in securing the line of sight because the existing coastal monitoring system is fixedly installed and LOS is not secured. Therefore, in this paper, the surveillance area is expanded by securing mobility through design and modification so that the radar, EO/IR monitoring equipment, and RCWS capable of ground/sea/air monitoring can be installed on small military vehicles. Although mobility and monitoring areas were secured using vehicles, the problem of LOS unsecured areas remains due to geographical limitations. To solve this problem, a reconnaissance drone equipped with EO/IR is used to monitor and reconnaissance areas where vehicles cannot enter. In addition, the existing coastal surveillance system has difficulty in convergence of information as radar and optical equipment are operated separately. The proposed mobile integrated surveillance system is designed to enable the integrated operation of heterogeneous sensors by installing/operating radar and EO/IR sensor on one master. We remove the loading part at the back of the small tactical vehicle and install the manufactured/designed shelter, and use it as a control room where the operator can control and operate the monitoring equipment. The operator analyzes the dangerous target and unidentified target information acquired through the monitoring equipment in real time and shares it with the related system, so that the early response is possible in the case of an actual engagement. By using the proposed mobile integrated surveillance system, the guarantee of prompt/accurate command/control that eliminates blind spots in monitoring can be linked to national security. It is expected that the advancement of border and coastal surveillance and reconnaissance systems will be realized by performing integrated operation through expansion and deployment of mobile integrated surveillance systems in the future.

The government is supporting systems and policies to improve competitiveness and revitalize the market in order to adapt to changes in the environment of the software business in the domestic public sector. Nevertheless, software development still has a low development success rate. Nevertheless, software development still has a low development success rate. In this paper, we aim to provide a strategy to increase development efficiency by reuse of COTS. So we carry out the following tasks so that software businesses in domestic public sector can move to a commercial software-based development environment. First, we analyzed the software development environment in the public sector with four criteria: suitability, maintainability, changeability, and security based on the domestic software market status and government policy support. And, we presented commercial software-based development (CBSD) activities from a reuse viewpoint by differentiating from existing studies that focused on the economic feasibility of commercial software. In addition, we classified public activity and COTS for CBSD and presented a strategy for mapping between them. Finally, we presented the strategic results for the provision of market-oriented COTS with repeatability and for the development of business-oriented GOTS. The results of this study provide a basis for policy setting to increase development productivity and quality in the public software field and to revitalize the domestic commercial software market.

In this paper, the problem of estimating a multivariate normal mean vector with identity covariance matrix is considered. The risk associated with the balanced loss function is used to compare two estimators. A series of estimators with polynomial forms dominating Lindley type estimator is derived using the Stein’s identity and a technique of Benkhaled et. al.. Each improved estimator is better than previous one using the increase of degree of polynomial. These estimators are mimimax because they dominate the maximum likelihood estimator(MLE). As a simulation study some graphs and tables are presented by using Mathematica programs. Through such a process, it is confirmed that the improved estimators dominate the previous estimators.

A smart home is a convergence technology that combines the Internet of Things (IoT) and sensor technology, and provides convenience to the home. And this smart home controls all devices through a single control display device. Representative functions provide convenience by controlling various lighting devices, energy devices, environmental devices, electronic devices, and curtains. However, recently, smart homes have become a social issue due to hacking accidents using the security vulnerabilities of the wall pad. Among these, it is a worrisome situation because it is not clear how to respond to personal information leakage and privacy infringement. Therefore, this study is expected to be utilized as basic data for future application and response technology development by examining attack technologies related to smart home and suggesting countermeasures.