• Journal of Convergence for Information Technology
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• v.11 no.9
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• pp.130-137
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• 2021

The characteristics of forced vibration by an external excitation force having a frequency were analyzed according to the amplitude and frequency of the excitation force. To obtain displacement, velocity, and acceleration, numerical analysis was performed to obtain the frequency response, and in particular, each FRF(Frequency Response Function) was analyzed to reveal the location of the system natural frequency and excitation frequency in the frequency domain. In the vibration model caused by external excitation, the natural frequency and distribution of the surrounding excitation mode in displacement, velocity and acceleration FRF. The FRF was also shown in the power spectrum and FRF of real and imaginary parts. The external excitation force was approximated with the excitation force of a sine wave by giving the amplitude and frequency, the mode generated by this excitation force could be distinguished. After numerical analysis by changing the equivalent mass, damping and stiffness, the forced vibration response characteristics by external excitation force were systematically analyzed.

• Journal of Convergence for Information Technology
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• v.11 no.11
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• pp.115-124
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• 2021

This research empirically tested the mediating role of customer emotion on the relationship between customer tumbler experience and social legitimacy. For this purpose, data were collected by surveying consumers who use tumblers. Structural equation model analysis was used for hypothesis testing, and the method proosed by Hoyle and Smith was used to additionally test the mediating effect of customer experience and social legitimacy. The empirical analysis results are as follows. First, customer experience has a positive effect on customer emotion and social legitimacy. Second, customer emotion has a positive effect on social legitimacy. This study proposes a exploratory relationship among customer tumbler experience, customer emotion, and social legitimacy and empirically shows that customer experience and customer emotion are identified as antecedents to social legitimacy.

• Journal of Convergence for Information Technology
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• v.11 no.11
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• pp.85-94
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• 2021

In this study, the effects of infection control health beliefs and critical thinking tendencies of nursing students on infection control standards were investigated. This study collected and analyzed the data of 222 nursing students from the College of Nursing located in City A from June 2021 to July 2021. Data were collected according to IRB-approved contents, and the collected data were analyzed using the SPSS 26.0 Statistics Program. The infection control health beliefs and critical thinking tendencies of nursing students affect the performance of standard infection control precautions(F=16.634, p<.001), and the explanatory power of the model was 22.0%. It is necessary to develop a nursing education program to improve health beliefs and critical thinking disposition and systematic and efficient infection control education to improve the performance of standard precautions for infection control of nursing students.

• Journal of Convergence for Information Technology
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• v.11 no.11
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• pp.248-255
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• 2021

This study confirmed the effects of improving lung damage of celecoxib using an animal model of chronic obstructive pulmonary disease(COPD). It was induced in models LPS + CSE and performed in vitro and in vivo. MTT assay and real-time PCR were performed in MRC5 cells as in vitro, and mRNA expression, BALF, collagen content, and protein expression were confirmed as in vivo. Celecoxib reduced the number of inflammatory cells, cytokine and soluble protein accumulation in BALF, decreased body weight and lung weight in animal models, and improved lung collagen deposition. In addition, the reduction of EMT markers was confirmed through Western blotting and real-time PCR. Consequently, celecoxib is thought to improve lung damage of COPD induced to LPS+CSE by regulating EMT.

• Journal of Convergence for Information Technology
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• v.11 no.8
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• pp.14-22
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• 2021

As the Covid-19 outbreak spreads and prolongs around the world, visitor lists are prepared in various ways when entering the facility to prevent infection and identify confirmed people. In this study, we propose an access management system using beacons to solve the problems with the preparation and management of existing visitor lists. The research method searches the laws related to the collection of personal information and compares the current status of personal information collection and trends in the beacons. The proposed system compares and analyzes existing methods and security and efficiency, which confirm accurate and rapid access registration. By using Beacon access management system, it is effective in preventing and responding to the spread of new infectious diseases in the future.

• Journal of Convergence for Information Technology
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• v.11 no.4
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• pp.55-63
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• 2021

Recently, the incidence rate of malicious codes is over tens of thousands of cases, and it is known that it is almost impossible to detect/respond all of them. This study proposes a method for detecting multiple behavior patterns based on a graph database as a new method for dealing with malicious codes. Traditional dynamic analysis techniques and has applied a method to design and analyze graphs of representative associations malware pattern(process, PE, registry, etc.), another new graph model. As a result of the pattern verification, it was confirmed that the behavior of the basic malicious pattern was detected and the variant attack behavior(at least 5 steps), which was difficult to analyze in the past. In addition, as a result of the performance analysis, it was confirmed that the performance was improved by about 9.84 times or more compared to the relational database for complex patterns of 5 or more steps.

• Journal of Convergence for Information Technology
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• v.9 no.2
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• pp.7-16
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• 2019

The purpose of this study is to identify the characteristics of researches that have been conducted for the last 20 years through analyzing global research trends and evolutions of design articles from 1999 to 2018 with keyword network analysis. For this purpose, we selected 3,569 articles in 22 journals related to design research retrieved from the Scopus database and constructed keyword network model through the author keyword and index keyword. The frequency of the author and index keyword, the centrality of betweenness and degree were analyzed with the keyword network. The results show that design has been applied to various fields for recent 20 years, and the research trends of design could be quantitatively characterized by keyword network analysis. The result of this study could be used to suggest future research topics in the field of design based on quantitative and empirical data.

• Journal of Convergence for Information Technology
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• v.9 no.3
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• pp.22-29
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• 2019

Due to the development of ICT technology, convergence reality contents are utilized as technology for providing services in various industrial fields by visualizing various information such as sensor information and shared information in a service platform showing only simple three-dimensional contents. Research is underway to reduce the weight of applications by transmitting the resources of the object to be enhanced to the network as the information and the contents to be provided increase. In order to provide resources through the network, servers for processing various information such as pattern information, content information, and sensor information must be constructed in a cloud environment. However, in order to authenticate data transmitted and received in real-time in a cloud environment, there is a problem in that the processing is delayed and a delay phenomenon occurs in the rendering process and QoS is lowered. In this paper, we propose a system to distribute cloud server which provides augmented contents of convergent reality service that provides various contents such as sensor information and three - dimensional model, and shorten the processing time of reliable data through distributed relay between servers Respectively.

• Journal of Convergence for Information Technology
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• v.9 no.7
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• pp.41-47
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• 2019

The purpose of this study examine to identify the mediating attitudes toward the geriatric patient in the relation between emotional work and burnout. Data were collected by self-report questionnaires targeting 142 caregiver in D city and G city. Data were analyzed with SPSS/PC ver. 21.0 programs. There were significantly positive correlations between toward the geriatric patient, emotional work and burnout. As a result of analyzing the main factors affecting the level of care performance for attitudes toward caring the geriatric attentiveness, health state, work type appeared to be significant explanatory variables, and this model's explanatory power was 31%. Therefore, it is necessary to apply the education program to improve the social awareness in addition to the stable work environment of the nursing care provider in order to raise the attitude of the caregiver to care for the elderly.

• Journal of Convergence for Information Technology
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• v.9 no.7
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• pp.122-134
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• 2019

The purpose of this research is to analyze the effect on children's creativity and nutrition knowledge of cooking activities by applying recipe development. The procedure consists 7 steps which are diagnosing a necessity, setting a basic direction, setting ingredients and topics of the activity, designing some models of the activity, designing some developed activity, lastly completing the creative cooking activity. The model of this activities consists 5 steps which are exploring the ingredients, creating a recipe, practising the activities, representing the activities, lastly evaluation the activities. Participants were 36 children who are 4 to 5 years old from K daycare center located in Busan. The results exhibited that creativity and nutrition knowledge of experimental group is significantly higher than comparative group. The creative cooking activity by applying recipe development is effective for advancing in creativity and getting nutrition knowledge of children.