• Geomechanics and Engineering
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• v.17 no.4
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• pp.367-374
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• 2019

This study concluded the results of a research on the features of cement based permeation grout, based on some important grout parameters, such as the rheological properties (yield stress and viscosity), coefficient of permeability to grout ($k_G$) and the inject ability of cement grout (N and $N_c$ assessment), which govern the performance of cement based permeation grouting in porous media. Due to the limited knowledge of these important grout parameters and other influencing factors (filtration pressure, rate and time of injection and the grout volume) used in the field work, the application of cement based permeation grouting is still largely a trial and error process in the current practice, especially in the local construction industry. It is seen possible to use simple formulas in order to select the injection parameters and to evaluate their inter-relationship, as well as to optimize injection spacing and times with respect to injection source dimensions and in-situ permeability. The validity of spherical and cylindrical flow model was not verified by any past research works covered in the literature review. Therefore, a theoretical investigation including grout flow models and significant grout parameters for the design of permeation grouting was conducted in this study. This two grout flow models were applied for three grout mixes prepared for w/c=0.75, w/c=1.00 and w/c=1.25 in this study. The relations between injection times, radius, pump pressure and flow rate for both flow models were investigated and the results were presented. Furthermore, in order to investigate these two flow model, some rheological properties of the grout mixes, particle size distribution of the cement used in this study and some geotechnical properties of the sand used in this work were defined and presented.

• Journal of Korean language education
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• v.28 no.4
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• pp.181-219
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• 2017

The purpose of this study is to review the functions of {됐어} and {X了} as a discourse marker on different levels, and to examine their similarities and differences. {됐어} has not been widely recognized as a discourse marker in the field of Korean linguistics and Korean language education. Therefore, in order to establish the identity of {됐어} as a discourse marker, the reasons that {됐어} can be regarded as discourse marker were explained prior to the contrastive analysis. As to the method of contrastive analysis for {됐어} and {X了}, they were analyzed on three main dimensions: that is, the textual dimension, the interpersonal dimension, and the metalinguistic dimension in the corpus consisting of scripts of Korean and Chinese sitcoms. The results are as follows. In the textual domain, {됐어} and {X了} have the function of closing the topic in common, while {X了} can indicate a new topic and transmit a topic. In terms of functions in the interpersonal domain, {됐어} and {X了} are commonly used to refuse a partner's proposal or request and to interrupt a partner's speech or action. Furthermore, in the interactional aspect, {됐어} and {X了} performs the function of expressing a response to a preceding utterance and taking the turn of speaking. The difference between them in the interpersonal domain is that {X了} performs the function of correcting a speaker's utterance. In the metalinguistic domain, {됐어} and {X了} are common in that they perform the function of expressing the dissatisfaction of the speaker, showing generosity and making a compromise with the addressee. {X了}'s distinguishing characteristics in this domain is that it can express the attitude of consoling the hearer.

• Journal of the Korean GEO-environmental Society
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• v.19 no.12
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• pp.65-72
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• 2018

The uses of unmanned aerial vehicles (UAV) have been expanding in agriculture surveys, obtaining real time updates of dangerous facilities where human access is difficult, disaster monitoring, and 3D modeling. In reality, there is an upsurge in the application of UAVs in fields like, construction, infrastructure, imaging, surveying, surveillance and transportation. Especially, when the slope failure such as landslide occurs, the uses of UAVs are increasing. Since, the UAVs can fly in three dimensions, they are able to obtain spatial data in places where human access is nearly impossible. Despite of these advantages, however, the uses of UAVs are still limited during slope failure. In order to overcome these limitations, this study computes the soil volume change during slope failure through the computation technique using photogrammetric information obtained from UAV system. Through this study, it was found that photogrammetric information from UAV can be used to acquire information on amount of earthworks required for repair works when slope collapse occurs in mountainous areas, where human access in difficult.

• Journal of the Korean Society of Manufacturing Process Engineers
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• v.17 no.6
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• pp.170-176
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• 2018

Recently, weapon system requires personal protection products due to the explosion of rapid-fire explosion, which is considered to be multi threat in modernization, complication and war against terrorism. However, the conventional Korean military bullet protection helmets are not suitable for wearing convenience and combatant interoperability in terms of ergonomic. In this paper, we propose a suitable 3D Scanning method for the head, and compare the measured 3D dimension with the existing 2D measurement value to identity the reliability. Reverse engineered soldier head using the quick surface method was realized with a perfect free-form surface and satisfactory tolerance range (${\pm}0.2mm$). Through the comparison of 3D and 2D measured head dimensions, the absolute error value was 0.73 mm on average and relative error was 0.35 %, confirming the high accuracy of the 3D scan modeling. Also, quick surface method using 3D scanner is suggested a fast and accurate skill for ergonomics in obtaining the head modeling needed for military's personal bullet protection helmet design.

• Journal of Korean Society of Industrial and Systems Engineering
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• v.41 no.4
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• pp.42-49
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• 2018

Pilot Aptitude Research Equipment (PARE) is a simulator developed to measure or research pilot aptitude and train for student pilots. Design of an ergonomic PARE operation console is required to operate the equipment effectively. This study carried out five steps : (S1) operator questionnaire survey, (S2) anthropometric design formula development, (S3) usability evaluation, (S4) improvement design, and (S5) validation considering both Physical User Interface (PUI) and Graphic User Interface (GUI) of PARE operation console. The operator questionnaire surveyed needs for each PUI and GUI part of the console from two PARE actual operators. In terms of PUI, the anthropometric design formula was developed by using design variables, body dimensions, target population characteristics, and reference posture related to the PARE console. In terms of GUI, the usability evaluation was conducted by three usability testing experts with a 7-point scale (1 : very low, 4 : neutral, 7 : very high) on GUI of the PARE operation console by seven usability criteria. The improved PARE operation console was designed to reflect the optimal values of design variables calculated from design formula, the results from usability testing, and the operator's needs. The improvement effect was observed by 20 people who had experience with the PARE operation console. As a result of the validation, monitor visibility and cockpit visibility for the improved PUI design and visibility and efficiency for the improved GUI design were significantly increased by more than 90% respectively. The improved design of the PARE operation console in this study can contribute to enhance operation performance of the PARE.

• The Journal of the Korea Contents Association
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• v.19 no.4
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• pp.30-40
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• 2019

As the urban scale changes and the construction technology develops, the living space is being expanded in three dimensions. However, despite the development of construction technology represented by the appearance of skyscrapers, damage to high - rise buildings with dense population can be rather high. In order to solve such a situation, digital twin technology that can control and predict the real world in real time can be an alternative, and it is necessary to utilize pre-constructed spatial information actively. Therefore, this study aims to provide a standardized data model for using existing such information as well as various information produced in the future to the building disaster prevention field. To this end, we developed a data model that extends the CityGML standard, a representative city information model, to disaster prevention.

• The Research Journal of the Costume Culture
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• v.26 no.6
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• pp.982-993
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• 2018

Consumers' interests in the environment have been growing; hence, their consciousness about the environment has changed and affected their clothing shopping behavior. Prior study indicated attitude-behavior inconsistency in eco-friendly consumer behavior. It was because consumers' consciousness or attitude was often measured at an abstract level, not at a product specific level. This study investigated eco-friendly clothing knowledge, eco-friendly clothing consciousness, and ecological clothing consumption behavior. The effects of consumers' level of clothing involvement and subjective norms in this process were also investigated. For the empirical research, a questionnaire was developed, and responses from 480 women in their 20s to 50s were statistically analyzed. Results indicated that interest and fashion consciousness dimensions of clothing involvement had a significant influence on eco-friendly clothing knowledge, which thereby significantly influenced the three factors of eco-friendly clothing consciousness: social responsibility, health orientation, and clothing resource-saving consciousness. Such factors had different roles in the clothing consumption process. Social responsibility had a significant influence on the entire process of clothing consumption: shopping, purchasing, using, and disposing behaviors. Health orientation consciousness had a significant influence on shopping and purchasing behaviors, whereas resource-saving consciousness had a significant impact only on shopping behavior. Subjective norms were significantly correlated with all aspects of the clothing consumption process. Influence on disposing behavior was relatively weaker than other aspects of clothing consumption behavior.

• Health Policy and Management
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• v.29 no.2
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• pp.146-159
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• 2019

Background: The purpose of this study is to measure the Korean health literacy level and to analyse its gaps according to the factors of socioeconomic and health status and health behaviors. Based on this, policy implications were reviewed to improve the understandability on health information and to reduce the gap among socioeconomic groups. Methods: HLS-EU-Q47, a tool developed by the European Health Literacy Project, was used to conduct a face-to-face interview survey on the health literacy for the samples from general population. Results: The public general health literacy (HL) index was 34.5 out of 50. HL is consisted of three sub-dimensions: healthcare (HC-HL), disease prevention (DP-HL), and health promotion (HP-HL). And a HL analysis found scores of 34.7 points for HC-HL, 35.4 points for DP-HL, and 33.3 points for HP-HL. The level of all HL was different according to socioeconomic characteristics and health behavior. Conclusion: Based on the results of this study, more research activities on health-related literacy need to be conducted, and monitoring system on the HL level needs to be developed and implemented. In addition, a program to improve HL levels needs to be developed in order to strengthen the basis for a more sustainable healthcare system as an agenda with national health policy priority.

• Human Ecology Research
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• v.56 no.6
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• pp.555-571
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• 2018

This study identified the characteristics of fashion rental service users as well as analyzed their purchase decision-making processes. A qualitative investigation was conducted through in-depth interviews with 13 women in their 20s-30s who have experienced renting fashion items due to a high interest in fashion. The results of the study are summarized as follows. The need recognition stage analyzed ventilation by mass media, SNS impact, curiosity, saving shopping time and money, awareness of situational necessity, and creation of various styles. The information search stage analyzed how users obtained information from 2 different sources of nonmarketer-dominated sources and marketer-dominated sources. The pre-purchase stage analyzed the evaluation of alternatives in which study participants used 2 evaluation criteria for fashion rental services and fashion rental items. The purchase stage analyzed how participants wait and select desired items (when receiving the notification of rentable items) or select alternative products. The consumption stage examined the usage frequency and usage method. The study divided the post-consumption evaluation stage into 2 categories for evaluation: personal feelings and service. The post-consumption behavior stage analyzed how participants displayed WOM, eWOM and purchase rental product behavior. Clothing shopping orientation of study participants is displayed in 5 dimensions of brand-seeking propensity, individuality-seeking propensity, economic efficiency-seeking propensity, rationality-seeking propensity, and pleasure-seeking propensity. This study identified three main characteristics in the study participants: interest in the fashion, favorable attitude toward used fashion items, consciousness of others.

• KIPS Transactions on Software and Data Engineering
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• v.8 no.5
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• pp.179-186
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• 2019

Information system audit, which provides effective diagnosis and inspection of IT governance, is applied to all aspects from planning to development and operation. However, there is a difficulty in carrying out the audit because the system for the specialized university IT project is not developed. Therefore, it is necessary to set the internal system as the audit-based application framework in order to apply it to university IT governance. In this paper, we propose a audit-based application framework of university information system developed for university. The framework has a difference from the existing audit system. By using this framework, it is possible to present a standard for the university IT project and easily approach and use it in the field. And it can be used for direct audit through this framework in the level of the auditor as well as the HQ admin. The framework categorizes the audit into three major dimensions and suggests a method that can be applied to the university information system audit through the UAFP(University Audit Framework Process) and quality assurance.