• Journal of the Korean Society of Hazard Mitigation
• /
• v.10 no.3
• /
• pp.13-20
• /
• 2010

To evaluate the performance of safety apparatus without the full scale crash test, the computer simulation is inevitable. But, to improve the accuracy of computer simulation, it is important to reasonably determine the input parameters in which the interaction of vehicle-guardrail-soil should be accounted for. This study is focused on how to enhance the reliance of the dynamic performance of guardrail obtained by computer simulation. Analyses were done on the sensitivity of output variables to the change of input parameters by using BARRIER VII of which the usefulness was proved on the barrier-vehicle impact analysis. Through the analyses important input parameters, which give sensitive effects to output of computer simulation, are found out, and methods to determine such parameters are suggested to improve the accuracy of simulation.

• International Journal of Highway Engineering
• /
• v.10 no.1
• /
• pp.123-134
• /
• 2008

Since the end treatments of guardrails installed on domestic roads have the shapes which can easily penetrate and turnover a vehicle, the occupant can be subjected to severe injury when a vehicle impacts the end treatments. In this study, the criteria of performance evaluation for end treatments are suggested which are suitable to domestic road circumstances. Based on the investigation for the installation and studies instances of end treatments, the mechanism of end treatments is examined and the new end treatment suitable to domestic road circumstances is suggested. The suggested end treatment was verified by computer simulation using d LS-DYNA programs and satisfied the suggested performance evaluation criteria for end treatments. And the developed end treatment was verified by full-scale vehicle crash test and satisfied the following three primary appraisal factors of the suggested performance evaluation criteria for end treatments; occupant risk criteria, structural adequacy, and after-collision vehicle trajectory. This study is the first to develop end treatments considering the occupant safety in Korea. Therefore, If the developed end treatments is installed on roads and highways, it can be expected that it will reduce the grave situation of end treatment accidents and increase the safety of roads.

• The Korean Journal of Mycology
• /
• v.41 no.4
• /
• pp.295-300
• /
• 2013

This study was conducted to test effect of fungicides on the spore germination and mycelial growth of BotaniGard$^{(R)}$(Beauveria bassiana GHA). Eight fungicides, which are using for plant disease control in cucumber cultivation, with different concentration were mixed with conidia of GHA isolate for 0.5, 2, and 4 hours. The fungicides trifluminazol, fenarimol, ethaboxam, copper hydroxide and tetraconazol did significantly not inhibit on spore germination and mycelial growth. The trifluminazol, propineb and tetraconazol on high concentrations inhibited the mycelial growth of GHA. However, mixing time of fungicide with conidia of GHA did not affect in spore germination and mycelial growth. These results suggest that fungicide effect needed be checked before mycopesticide is applied in the field.

• The Journal of the Institute of Internet, Broadcasting and Communication
• /
• v.16 no.3
• /
• pp.179-186
• /
• 2016

A study is to research crash barriers for vehicles that prevent road breakaway of vehicles and protect car passengers and pedestrians as absorbing impulse. Protection performance tests on vehicle passengers were simulated by using a LS-DYNA program. Through repetitive simulation on various speed and angles, passenger protection performance according to different impact condition was contemplated. Variable setting for the simulation was calculated as the mean weight of domestic car sales. By analyzing NASS (National Automotive Sampling System) of NHTSA (National Highway Traffic Safety Administration) of the U.S., the actual speed and collision angle section of accidents were computed. As a result, we confirmed that THIV (Theoretical Head Impact Velocity) and PHD (Post-impact Head Deceleration) are increased according to the impact speed and angle. Also, when the vehicle hit the guardrail post, we could be confirmed that the passenger protection performance greatly decreased.

• The Journal of the Institute of Internet, Broadcasting and Communication
• /
• v.18 no.1
• /
• pp.151-157
• /
• 2018

This paper presents an implementation of a smart plant pot which can supply light and water automatically according to the result of detection on current temperature, humidity and illumination, and deliver the images of the plant realtime by using a camera installed in the pot. We designed a container of the plant pot divided into five layers, printed each of them with a 3D printer, and then assembled them. Inside of the container, we installed sensors, a pump, and a camera. We developed an Android application so that the user can control the plant pot and monitor its state. In communication between the Android application and the Raspberry Pi, MQTT protocol was utilized.

• 한국벤처창업학회:학술대회논문집
• /
• 2018.11a
• /
• pp.31-34
• /
• 2018

다중지능은 하워드 가드너가 제시한 개념으로, 지능이 단일한 지적 능력을 나타내는 구조(construct)이라기 보다는 다차원적인 복수의 하위 능력들로 구성된 것이라는 의미를 담고 있다. Gardner는 다중지능의 구성을 음악지능이나 신체운동지능, 논리수학지능, 언어지능, 공간지능, 인간친화지능, 자기성찰지능 그리고 자연친화지능 등과 같은 상호독립적 능력으로 분류하고 있으며, 각 개인은 각 능력 영역에서 다른 발달 수준을 가지고 있다고 본다. 본 연구는 창업자의 다중지능의 영역별 발달 특성이 창업 실행 행동, 창업 분야, 창업 성과 만족도에 영향을 미치는지를 알아보는 것을 통해 예비 창업자들이 본인의 적성과 재능에 적합한 분야에서의 창업 가능성을 탐색하도록 돕는 지도자들에게 시사점을 제공하고, 향후 창업가 육성 프로그램의 구성 개선안을 마련하는 데에 기여하고자 한다. 이를 위해 본 연구에서는 2018년 중소기업진흥공단 청년창업사관학교에 입교한 만 39세 이하의 청년창업자 200인을 대상으로 다중지능검사와 인구통계학적 특성 및 창업 특성에 대해 묻는 설문조사를 실시한 후, Pearson 상관계수 및 다변량분산분석을 통해 수집된 자료를 분석할 예정이다. 연구목적을 달성하기 위하여 설정한 가설은 다음의 3가지이다. 가설 1. 창업자의 다중지능 영역별 발달 수준과 창업 실행에는 정적인 상관이 있을 것이다. 가설 2. 창업자의 다중지능 영역별 발달 수준에 따라 창업자가 선택한 창업 분야에 유의한 차이가 있을 것이다. 가설 3. 창업자의 다중지능 영역별 발달 수준에 따라 창업자의 창업 성과 만족도에 유의미한 차이가 있을 것이다.

• Journal of the Korea Convergence Society
• /
• v.11 no.11
• /
• pp.1-7
• /
• 2020

Android apps are mostly distributed as an apk files, and when the apk file is uncompressed, resource files such as xml files, images, and sounds related to app design can be extracted. If the resources of banking or finance-related apps are stolen and fake apps are distributed, personal information could be stolen or financial fraud may occur. Therefore, it is necessary to make it difficult to steal the design as well as the code when distributing the app. In this paper, we implemented a tool to convert the xml file into Java code and obfuscate using the Proguard, and evaluated the execution performance. If the layout obfuscation technique proposed in this paper is used, it is expected that the app operation performance can be improved and the illegal copying damage caused by the theft of the screen design can be prevented.

• KIPS Transactions on Computer and Communication Systems
• /
• v.8 no.8
• /
• pp.201-208
• /
• 2019

Intra-Body Communication (IBC) is a communication method using the human body as a communication medium. The fact that our human body consists of water and electrolyte allow such communication method could work and have strength in low-power. However, because the IBC directly affects to human body by using it as a medium, there was a lack of research in communication protocols of each communication layer. In this paper, we suggests MAC parameters which affects the performance of communication in human body channel, and propose new MAC protocol. Our results shows that our MAC is suitable for supporting high data rate applications with comparable radio duty cycle performance.

• Journal of The Korean Association of Information Education
• /
• v.18 no.1
• /
• pp.13-23
• /
• 2014

For this paper, we developed a game-addiction therapy program for students with gaming addiction based on multiple intelligences (MI) and verified its effects. The participants were 54 elementary students selected through a game addiction test in Incheon City, Korea. We tested the students' MI to facilitate program development. the students with gaming addiction showed strengths in the Bodily-kinesthetic, Naturalist, and Spatial intelligences whilst showing weaknesses in the Logical-mathematical, Intrapersonal, and Interpersonal intelligences as opposed to normal students who had opposite results. We arranged the program around various gaming and playing activities to engage their stronger intelligences; we added activities to address their weakness (i.e., Logical-mathematical, Intrapersonal, and Interpersonal intelligences). This study has shown that this program lowered the game immersion level of the students and was helpful in turning their attention to other activities. There were significant differences between pretest and posttest game addiction scores (p<0.001). Their weekly gaming time and computer usage decreased rapidly. Satisfaction with the game addiction therapy program based on MI was very high.

• Journal of the Korean BIBLIA Society for library and Information Science
• /
• v.26 no.4
• /
• pp.65-82
• /
• 2015

This study tries to discuss the problems of reading education based on the theory of multiple intelligences and after reading activity. For the theory of multiple intelligences, Dr. Howard Gardner asserted eight types of multiple intelligences under the presupposition the anyone had infinite ability. He analyzed and applied reading education by types of multiple intelligences and proposed a new program for the reading education aiming to evenly promote children's various intelligences and heighten their creativities. The purpose of the new program is to have children throw away the idea that they should perfect their resultants in reading education time, develop their own strong intelligences through various experiences and processes and complement their lacking abilities. To prove the validity of the program I made FGI (Focus Group Interview) to the sample group consisting of child reading education experts. Analyzing the interview showed that the general idea of the group corresponded to the researcher's expectation effect. I see that reading education has one-dimensionally developed significance if it enables all the children of the present and the future not to have the oppressive feeling that they should produce masterpieces in reading education but to take pleasure in the activities and improve their own abilities.