• Journal of the Korea Academia-Industrial cooperation Society
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• v.21 no.10
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• pp.137-143
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• 2020

To ensure safety of raw materials for military foods, hazard assessment and monitoring of residual pesticides was conducted on agricultural products consumed by 9 companies based in Gyeongin and Gangwon. Residual pesticides were analyzed for 142 different products, by applying the multi-species pesticide polycomponent analysis method. Of the 36 samples analyzed, residual pesticides were detected in 7 samples, representing a detection rate of 19.4%. One particular pesticide residue was detected in peanuts, green onions, and red pepper powder, and 20 types of pesticide residues were detected in red pepper powder used in combat foods. However, all residues were found to be below the permissible level. Moreover, the hazard assessment results for Cypermethrin, Tebuconazole and EPN showed the highest concentration among the residual pesticides detected. Since the estimated intake was less than 100% as compared to the ingestion limit, it was considered to be safe. I have suggested the edit as per my understanding. Please review for accuracy, and revise appropriately if required. This is the first pesticide Risk Assessment study encompassing military requirements. Considering the results, we expect further application research, including research on reducing hazardous materials.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.6 no.2
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• pp.134-143
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• 2005

Collagen is the important structural proteins in mammals with various peptide composition and cross-linkings. The direct analysis of collagen protein was not suitable because of its structural complexity and diversity. In this study, we suggest the simple way of collagen analysis by introducing matrix-assisted laser desorption/ionization time-of flight mass spectrometry (MALDI-TOF MS) to identify the collagen and its trypsin-digested fragments, and by subsequent time-of-flight tandem mass spectrometry(Q-TOF MS/MS) to analyze the amino acid sequences of identified fragments. Using the collagen samples extracted from the tail of mouse, 10 separated bands were found in SDS-PAGE, and the masses of most bands could be more finely determined by MALDI-TOF MS. When each 10 separated proteins was tryptic digested and introduced to MALDI-TOF, the Gly1056-Arg1073 fragment from $\alpha_1$-chain was identified in four bands, and the Gly1056-Arg1073 fragment from $\alpha_2$-chain was identified in five bands, both in type I collagen. Although few fragments were found because of the cross-linkings left in digested collagen sample, it could be determined that the type I collagen existed at least in 7 separated bands. When the amino acid sequences of two identified fragments were analyzed by Q-TOF MS/MS, both sequences were identical with those determined by MALDI-TOF MS. It suggested that the two peaks in MALDI-TOF MS caused by the fragments identified in this work could be used as the fingerprint to simply identify type I collagen in protein samples.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.17 no.2
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• pp.156-163
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• 2016

This study examined the level of knowledge, attitude, and performance ability of automated external defibrillator (AED) and cardiopulmonary resuscitation (CPR) among university students who were not in health-related majors and to explore the relationships among these variables. In this study, 291 students were recruited from 3 universities in D city. Among them, 77.0% had ever seen or heard of AED and 61.9% did not know how to use it. The levels of knowledge, attitudes and performance ability differed significantly according to the CPR training experience and AED awareness (p<.002~.001). The performance ability showed significant correlations with knowledge (r=. 42, p<.001) and attitude (r=. 55, p<.001) of AED and CPR. These findings suggest that future AED and CPR training programs should be developed to promote a positive attitude towards the willingness to perform AED and CPR as well as to increase the participants' confidence by repeated training.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.17 no.8
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• pp.251-261
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• 2016

Recently, many weapon related quality issues have arisen in the armed forces, such as failures of K-21 Infantry Fighting Vehicles, K-9 self-propelled mounts, and grenade explosion during boot training. Since all of the issues are repetitive phenomena, we examined the defense quality management system and identified the possible solutions for it. Since the government quality assurance agency performs their quality assurance activity using the system evaluation technique, we first reviewed the regulations related to the defense quality management system. Then, we benchmarked some other advanced quality management systems. We suggested two types of defense quality management system, one for small (in terms of the amount of the contract) competitive contracts and the other for large private contracts. For the first one, we adopted the framework of MIL-I-45208 (Inspection System Requirement), while for the second one, we adopted the framework of NATO AQAP 2310 (Quality Management System Requirements for Aviation, Space and Defense Suppliers).

• Journal of the Korea Academia-Industrial cooperation Society
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• v.17 no.2
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• pp.299-306
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• 2016

In this paper, a method of shape prediction of an endoscope handling robot that can imitate a surgeon's behavior using a sensor network is suggested. Unit sensors, which are composed of a 3-axis magnetometer and 3-axis accelerometer pair comprise the network through CAN bus communication. Each unit of the sensor is used to detect the angle of the points in the longitudinal direction of the robot, which is made from a flexible tube. The signals received from the sensor network were filtered using a low pass Butterworth filter. Here, a Butterworth filter was designed for noise removal. Finally, the Euler angles were extracted from the signals, in which the noise was filtered by the low path Butterworth filter. Using this Euler angle, the position of each sensor on the sensor network is estimated. The robot body was assumed to consist of links and joints. The position of each sensor can be assumed to be attached to the center of each link. The position of each link was determined using the Euler angle and kinematics equation. The interpolation was carried out between the positions of the sensors to be able to connect each point smoothly and obtain the final posture of the endoscope in operation. The experimental results showed that the shape of the colonoscope can be visualized using the Euler angles evaluated from the sensor network suggested and the shape of serial link estimated from the kinematics chain model.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.17 no.8
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• pp.363-368
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• 2016

In safety-critical systems (SCS), failure may result in accidents with serious damage to human beings and property. As systems become more complex and automated, the goal of acquiring safety has attracted increasing attention lately in the defense industry, as well as the rail, automotive, and aerospace industries, among others. As such, the Department of Defense and international organizations have established appropriate standards and guidelines for systems safety and design. To this end, there has been research on the processes, methods, and associated tools for safety design. However, those results do not seem to sufficiently utilize system architectural information. The purpose of this paper is to provide a more systematic approach to SCS design. To better identify potential hazards, design information at each level of system hierarchy is exploited. Based on the results, an integrated process model was developed by combining the processes of system design and safety analysis. As a case study, the resultant integrated process model was applied to the safety design of an automobile system, which shows useful results for safety evaluation.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.17 no.8
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• pp.352-362
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• 2016

Today, it appears that the rapid advances in technology have allowed broadening both the system technology and the business opportunities in the rail industry. Owing to the developments in technology and the industry, and also due to the hearth, the latest high-speed trains and a variety of unattended operations in rail systems are being developed and are operational. In particular, this study covers the existing railway rolling stock and signaling systems that operate in an environment more complex than the concept of localized management, so the introduction of a new signaling system is needed. In addition, developments based on the existing signal system concepts for passenger railways need to minimize human injury. In this study, to participate in the development of new systems in a variety of domains and to provide an integrated common vision methodology as an engineer on the basis of efficient signal system design and safety would like to present the methodology for action. Therefore, each different linkage through the next new domain zone system design: design through to secure the integrity of safety than can secure methodology.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.17 no.8
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• pp.397-406
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• 2016

The purpose of this descriptive study was to identify the relationship between maternal self-efficacy and young children's ego-resilience on their children's adjustment to educational institutions. The study population consisted of 162 young children's mothers and teachers from seven kindergartens in A city. Data were collected from June 1 to June 30, 2016. The questionnaire consisted of 73 items about maternal self-efficacy, children's ego-resilience and children's preschool adjustment. The collected data were analyzed by frequency, descriptive methods and Pearson's correlation coefficient using SPSS/WIN 22.0 version. The study results were as follows. First, maternal self-efficacy was weakly positively(+) correlated with the activeness of children's preschool adjustment. Second, children's ego-resilience was significantly positively(+) correlated with children's preschool adjustment. Third, regarding the relationship between maternal self-efficacy and young children's ego-resilience on their children's adjustment to educational institutions, maternal self-efficacy was weakly positively(+) correlated with children's ego-resilience and children's preschool adjustment, while children's ego-resilience was strongly positively(+) correlated with maternal self-efficacy and children's preschool adjustment. In conclusion, this study finding of a positive(+) relationship between maternal self-efficacy and young children's ego-resilience on their children's adjustment to educational institutions indicates that children's ego-resilience is a reliable predictor of children's preschool adjustment. These study results imply that children's ego-resilience is strongly influenced by children's preschool adjustment.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.17 no.2
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• pp.343-350
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• 2016

To prepare a method for improving the oral health-related quality of life for Chinese foreign students by examining the oral health care behavior affecting the oral health-related quality of life, a self-administered survey was conducted with 236 Chinese foreign students at an university located in Jeonbuk during April 2 -May 5, 2013. The results showed that 65.3% had not visited the dentist within one year, 82.6% had not received scaling within one year, and 68.2% had not received oral health education. In regards to the OHIP-14 according to the general characteristics, there was a significant difference in the school year, health insurance enrollment status and overseas study life satisfaction (p<0.05). In regards to the OHIP-14 according to the oral health care behavior, there was a significant difference in the subjective oral health condition, the experience of having visited a dentist within one year and an experience of having received scaling (p<0.05). As for the influencing factors on the oral health-related quality of life, they were found to be the subjective oral health condition and the experience of having received scaling within one year (p<0.05). For the purpose of helping Chinese foreign students to conveniently use medical institutions when oral health-related problems arise, there is a need for a translated version of the guidebook in their native language, the availability of medical professional interpreters, the availability of a university level oral health service center, and practical oral health education to enhance oral health.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.17 no.8
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• pp.449-455
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• 2016

This study is a part of research to develop a steel-concrete hybrid girder using ultra high-performance concrete with a compressive strength of 80 MPa. To this end, the Eurocode design formula for the shear resistance developed in a concrete-to-concrete interface was examined for the interface between concrete layers of different strengths. To examine the effect of the surface roughness on the shear resistance, a push-out test was conducted on specimens while considering the parameters of the Eurocode design equation. The actual behavior was evaluated with respect to the compressive strength of the concrete, the reinforcement ratio of the shear rebar, and the interfacial surface condition. The specimen with a rough interface shows 20-50% higher shear strength than that estimated by the design equation. In the case of failure mode, abrupt failure tends to occur at the interface of the concrete layer for the specimen with a low reinforcement ratio. It is expected that the shear strength of the concrete layer will increase according to the strength differential in the concrete layers.