• Journal of the Korea Institute of Information Security & Cryptology
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• v.32 no.5
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• pp.965-973
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• 2022

As IoT(Internet of Things) devices become common, many algorithms have been developed to protect users' personal information. The laser fault injection attack that threatens those algorithms is a side-channel analysis that intentionally injects a laser beam to the outside of a device to acquire confidential information or abnormal privileges of the system. There are many studies to determine the timing of fault injection to reduce the number of necessary fault injections, but the location to inject faults is only repeatedly searched for the entire area of the device. However, when fault injection is performed in an algorithm-independent area, the attacker cannot obtain the intended faulted statement or attempt to bypass authentication, so finding areas vulnerable to fault injection and performing an attack is an important consideration in achieving a high attack success rate. In this paper, we show that a 100% attack success rate can be achieved by determining the vulnerable areas for fault injection by using electromagnetic and thermal information generated from the device's chip. Based on this, we propose an efficient fault injection attack system.

• Journal of the Korean Association of Geographic Information Studies
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• v.22 no.4
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• pp.131-145
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• 2019

Korea has set up a radiation emergency planning zone based on the 「Act on Physical Protection and Radiological Emergency」 to protect residents living near nuclear power plants in the event of nuclear disasters. Little research has been conducted on the appropriateness of existing nuclear evacuation facilities because of a general lack of interest in nuclear accidents. This research addresses this gap by analyzing the location adequacy of evacuation facilities in Busan's emergency protection planning area based on vulnerable populations and accessibility analyses. The Gijang-gun which has the greatest risk, shows that only 4.05% of the total urban area was included in the evacuation service area within 5 minutes while only 36.93% of Geumjeong-gu and 37.23% of Haeundae-gu were included in the evacuation-enabled area. In addition, evaluation facilities in the elderly population hotspots were lacking, and there was a wide gap between dongs within the same Gu. Thus, additional evacuation facilities need to be designated and installed considering the spatial equity between areas and safety of both the public and vulnerable populations.

• Proceeding of Spring/Autumn Annual Conference of KHA
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• 2008.11a
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• pp.222-225
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• 2008

In urban life, an interest in safety and demands for safety information about crimes and traffic are increasing. As well, communication on the internet is so active. In this study, we analyze web sites in US, UK, and JP, which have started safety map services, and then we provide basic material for the introduction of safety map into Korea. According to the analysis result, in US and UK, the safety map web sites are administered by the government and provided to the general public. The geographical area is provided around administrative districts and statistical data. In JP, The safety map web site provide not a one sided service but the service that user can directly take a part in, and also there is an web site for crimes against vulnerable people.

• Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
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• v.38 no.5
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• pp.401-406
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• 2020

Continuously monitoring of Horizontal and Vertical movements in vulnerable areas due to earthquakes and volcanic activities is vital. These geohazard activities are the result of a slow deformation rate at the tectonic plate boundaries. The recent development of GPS (Global Positioning System) technology has made it possible to attain a millimeter level changes in the Earth's crust. This study used continuously observed GPS data at the flank of Ol Doinyo Lengai volcanic Mountain to determine crustal motion caused by impinging volcano from mantle convention. We analyzed 8 GPS observed from June 2016 to Dec 2019 using a well-documented Global Kalman Filter GAMIT/GLOBK software. The resulting velocity from GAMIT/GLOBK analysis was then used to compute the relative motion of our study area with respect to Nubia plate. Our analysis discovered a minor motion of less than 5mm/year in both horizontal and vertical components.

• Journal of Korean Society of Rural Planning
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• v.12 no.1 s.30
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• pp.37-48
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• 2006

The objectives of this study were to develop an evaluation method of regional vulnerability to agricultural drought and to classify the vulnerability patterns. In order to test the method, 24 city or county areas of Gyeonggi-do were chose. First, statistic data and digital maps referred for agricultural drought were defined, and the input data of 31 items were set up from 5 categories: land use factor, water resource factor, climate factor, topographic and soil factor, and agricultural production foundation factor. Second, for simplification of the factors, principal component analysis was carried out, and eventually 4 principal components which explain about 80.8% of total variance were extracted. Each of the principal components was explained into the vulnerability components of scale factor, geographical factor, weather factor and agricultural production foundation factor. Next, DVIP (Drought Vulnerability Index for Paddy), was calculated using factor scores from principal components. Last, by means of statistical cluster analysis on the DVIP, the study area was classified as 5 patterns from A to E. The cluster A corresponds to the area where the agricultural industry is insignificant and the agricultural foundation is little equipped, and the cluster B includes typical agricultural areas where the cultivation areas are large but irrigation facilities are still insufficient. As for the cluster C, the corresponding areas are vulnerable to the climate change, and the D cluster applies to the area with extensive forests and high elevation farmlands. The last cluster I indicates the areas where the farmlands are small but most of them are irrigated as much.

• Journal of Satellite, Information and Communications
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• v.11 no.3
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• pp.110-113
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• 2016

In this paper of ka band satellite communication using geostationary satellite is very weak to rainfall. So the rain attenuation reflect the values calculated using the satellite communication links vulnerable when designing a more reliable rainfall area distribution of rain attenuation and accurate predictive models must analyze the link budget. In this paper, by utilizing domestic distribution analysis in the recent local rainfall Crane and regional rainfall in the model and compared with the country of the regional distribution of rainfall in your area to fit the rain attenuation in Ka band frequency characteristics Crane rain attenuation prediction models were analyzed to between geostationary satellites and ground station position, distance and year time percentage(%).

• Safety and Health at Work
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• v.3 no.3
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• pp.235-240
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• 2012

The objectives are to compare the airborne asbestos concentrations resulted from mitering of abestos cement roof sheets by a high-speed motor and a hand saw, and to monitor whether other workers near the test sites are vulnerable to the fibers exceeding the occupational exposure limit. Four test cases were carried out and altogether 7 personal and 4 area air samples were collected. The NIOSH method 7400 was employed for the air samplings and analysis. Using the phase contrast microscopy, fiber counting was conducted under Rule A. The study showed that the fiber concentration medians for personal air samples gathered from the two tools were 4.11 fibers/cc (ranged: 1.33-12.41 fibers/cc) and 0.13 fibers/cc (ranged: 0.01-5.00 fibers/cc) respectively. The median for the area samples was 0.59 fibers/cc (ranged: 0.14-3.32 fibers/cc). Comparing each study case, the concentration level caused by the high-speed motor saw was more than twice that of the hand saw. According to the area samples, the workers nearby the test site are at risk from high exposure to asbestos.

• The Journal of Korean Association of Computer Education
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• v.14 no.6
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• pp.75-81
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• 2011

Cookie is simple text file, which contains records of web service which provided to user. some of data included in Cookie has user's private information. When attacker has Cookie which included user's private information, will causing financial losses. In this paper we designed security section which can improve vulnerable Cookie's security level. Through research and vulnerability analysis of Cookie file, we find out how to implement security area to offer efficient security area and design security area for cookie file. Also we checked security level to performance evaluation. Through this security level, we can keep user's private information secure using Cookie's improve security level which stored in user's personal computer.

• Korean Journal of Remote Sensing
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• v.34 no.6_3
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• pp.1319-1327
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• 2018

Korea has a terrain vulnerable to drought due to the concentration of precipitation in summer and the large amount of groundwater discharge. Quantified drought indices are used to determine these droughts. Among these, drought index is mainly used for analysis of precipitation, and recently, researches have been conducted to monitor drought using satellite images. In this study, we used the KOMPSAT-2/3 image to calculate the water surface area and compare with the drought index in order to monitor the drought in the Upper Soyang River. As a result, it was confirmed that the tendency of the water surface area change and the trend of the drought index were similar in the satellite images. Future research could be used as a basis for judging drought.

• The Korean Journal of Psychodrama
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• v.21 no.2
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• pp.13-26
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• 2018

The purpose of this study was to determine Enneagram personality type and the degree of clinical practice stress by personality type among nursing students, as well as to set a direction for student counseling and develop a management program. For this purpose, the Enneagram personality type inventory, developed by the Korea Enneagram Spirituality Institute, and a clinical practice stress scale were applied to juniors and seniors majoring in nursing in a district who were in clinical practice. The results were analyzed using an SPSS 25.0 program. Type 2 among the nine Enneagram personality types accounted for 47.66% while in the strength- centered area, the emotional area accounted for 64.84%. As for the degree of clinical practice stress by Enneagram personality type, Type 6 was most vulnerable to the training environment, Type 4 to an undesirable role model and conflicts with patients, and Type 5 to the burden of training tasks and conflicts in interpersonal relationships among the sub-areas of stress. As for the degree of clinical practice stress by the strength-centered area of Enneagram, the thinking type was most vulnerable to the training environment, an undesirable role model, the burden of training tasks, and interpersonal relationships, whereas the emotional type to conflicts with patients. To put these results together, nursing students varied in Enneagram personality type and differed in clinical practice stress by the strength-centered area, as well as by personality type. It is therefore necessary to provide nursing students with counseling and guidance through an analysis of their personality type.