• Journal of the Korean Home Economics Association
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• v.37 no.11
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• pp.33-48
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• 1999

The purpose of this study was to suggest some ways to utilize effectively the labor forces of employed women. For this purpose, this stud\ulcorner examined the family’s attitudes toward the work of married women and the effects of determinants including personal characteristics, household related variables, work related variables and family’s attitudes toward the work of married women on the employment status of married women. KLFI(1995)’s National data were used and one Logistic model and one Calmed model were employed to analyze the efficients of the independent variables. The resets of this study were as follows. The family’s attitudes toward the work of married women among the employed women was highly positive and the one toward the unemployment among the unemployed women was positive too. The variables having significant effects on the husbands’attitudes and the parents(parents in law)’attitudes toward the work of married women were different. The family’s altitudes had a very significant effect on the employment status of married women. Also, the financial situation of the household and some difficulties to find proper house keepers or child care types were important variables to predict the employment status of married women.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• v.2
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• pp.47-51
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• 2006

Among Solar activities' events, the geomagnetic storms are believed to cause the largest atmospheric effects. The geomagnetic storm is a complex process of solar wind/magnetospheric origin. It is well known to affect severely on the ionosphere. However, this effect of this complex process will maybe act at various altitudes in the atmosphere, even including the lower layer and the neutral middle atmosphere, particularly the stratosphere. Nowadays, the GPS-derived ZTD (zenith tropospheric delay) can be transformed into the precipitable water vapor (PWV) through a function relation, and further has been widely used in meteorology, especially in improving the precision of Numerical Weather Prediction (NWP) models. However, such geomagnetic effects on the atmosphere are ignored in GPS meteorology applications. In this paper, we will investigate the geomagnetic storms' effects on the middle atmosphere and troposphere (0-100km) by GPS observations and other data. It has found that geomagnetic storms' effect on the atmosphere also appears in the troposphere, but the mechanism to interpret correlations in the troposphere need be further studied.

• Journal of the Korean Society of Clothing and Textiles
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• v.31 no.1 s.160
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• pp.151-161
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• 2007

The purpose of this study was to examine the effects of fashion brand attachment on attitudes toward brand extension. Two hundred thirty-four female college students participated in this study. For this study, Bean Pole brand was selected for the example of brand extension through three pre-test. For data analysis, descriptive statistics, factor analysis, multiple regression, and ANOVA were used for this study. As the results, first, brand attachment was classified into three factors such as 'love', 'trust', and 'interest' factors. Second, attitudes toward brand extension were divided into two factors such as similarity of brand extension and purchasing intention. Generally, higher scores on brand attachment was correlated with higher scores on altitudes toward brand extension. Third, results revealed that generally 'love' and 'trust' factors had affected 'attitudes toward brand extension' or 'purchasing intention'. Fourth, among the three groups (heavy/middle/low) of brand attachment, the heavy group showed higher preference of brand extension attitudes. Based on these results, fashion brand marketing strategies would be suggested.

• Journal of the Korean Society for Aviation and Aeronautics
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• v.29 no.2
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• pp.94-99
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• 2021

UTM is an air traffic management ecosystem under development for autonomously controlled operations of UAS by the FAA, NASA, other federal partner agencies, and industry. They are collaboratively exploring concepts of operation, data exchange requirements, and a supporting framework to enable multiple UAS operations beyond visual line-of-sight at altitudes under AGL 500ft in airspace where air traffic services are not provided. Minimum Safe Altitude is a generic expression, used in various cases to denote an altitude below which it is unsafe to fly owing to presence of terrain or obstacles. The European drone regulation mentions that the UAS is maintained within 120 metres from the closest point of the surface of the earth during flight, except when overflying an obstacle. This study attempted to develop a minimum flight altitude database system. Based on domestic and international rules and regulations on setting the minimum flight altitude it is expected that it can be applied to the operation of aircraft and unmanned aerial system in UTM environments for specific area in Korea.

• International Journal of High-Rise Buildings
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• v.9 no.4
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• pp.351-360
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• 2020

Monitoring civil structures periodically is necessary for ensuring the fitness of the structures. Cracks on inner and outer surfaces of the building plays a vital role in indicating the health of the building. Conventionally, human visual inspection techniques were carried up to human reachable altitudes. Monitoring of high rise infrastructures cannot be done using this primitive method. Also, there is a necessity for more accurate prediction of cracks on building surfaces for ensuring the health and safety of the building. The proposed research focused on developing an efficient crack classification model using Transfer Learning enabled EfficientNet (TL-EN) architecture. Though many other pre-trained models were available for crack classification, they rely on more number of training parameters for better accuracy. The TL-EN model attained an accuracy of 0.99 with less number of parameters on large dataset. A bench marked METU dataset with 40000 images were used to test and validate the proposed model. The surfaces of high rise buildings were investigated using vision enabled Unmanned Arial Vehicles (UAV). These UAV is fabricated with TL-EN model schema for capturing and analyzing the real time streaming video of building surfaces.

• Journal of Species Research
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• v.11 no.2
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• pp.117-127
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• 2022

This study is based on crane fly specimens collected during an 80-year period (1937-2017) in the Republic of Korea and Democratic People's Republic of Korea, and are in collections maintained at the United States National Museum, Smithsonian Institution, Washington DC, USA; the Snow Entomological Museum, University of Kansas, Lawrence, KS, USA; and the National Institute of Biological Resources, Incheon, South Korea. These crane flies are developing in wet places which usually prevail at lower altitudes, but such areas are often used for agriculture and human settlements, making natural habitats scarce and fragmented. Probably because of that, Limnophila crane flies are rare on the Korean Peninsula and were unnoticed by previous researchers. The genus Limnophila Macquart, 1834 with three species being new record for the Korean Peninsula: L. (Limnophila) japonica Alexander, 1913, L. (L.) pictipennis (Meigen, 1818) and L. (L.) politostriata Alexander, 1934a. General information are presented for each species, such as on genus and subgenus, redescriptions of species based on Korean specimens, illustrations of both sexes, elevation range, period of activity, habitat information, general distribution, and a distribution map for the Korean Peninsula.

• Journal of Species Research
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• v.11 no.1
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• pp.38-46
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• 2022

This study is based on crane fly specimens collected during more than 80 years, starting from 1938 through 2019, in the Republic of Korea and Democratic People's Republic of Korea and are in collections maintained at the United States National Museum, Smithsonian Institution, Washington DC, USA; the Snow Entomological Museum, University of Kansas, Lawrence, KS, USA; and the National Institute of Biological Resources, Incheon, South Korea. Pilaria crane flies are aquatic and semiaquatic, developing in fast running and stagnant water bodies and in wet muddy places at the margins of water pools. Such habitats usually prevail at lower altitudes, but these areas most often are used for agriculture and human settlement, making natural habitats scarce and fragmented. Pilaria crane flies are rare, thus it is not surprising that genus was left unnoticed by previous researchers. The genus Pilaria Sintenis, 1889 with two species P. melanota Alexander, 1922 and P. simulans Savchenko, 1983, is a new record for the Korean Peninsula. We present general information on the genus, redescriptions of species based on Korean specimens, illustrations of both sexes, elevation range, period of activity, habitat information, general distribution, and a distribution map for the Korean Peninsula for each species.

• KSII Transactions on Internet and Information Systems (TIIS)
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• v.17 no.9
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• pp.2590-2608
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• 2023

The high-altitude and mobility characteristics of unmanned aerial vehicles (UAVs) have made them a key element of new radio systems, particularly because they can exceed the limits of terrestrial networks. However, at high altitudes, UAVs can be significantly affected by intercell interference at a high line-of-sight probability. To mitigate this drawback, we propose an algorithm that selects the optimal beam to reduce interference and maximize transmission efficiency. The proposed algorithm comprises two steps: constructing a user-location-based fingerprint database according to the user types presented herein and cooperative beam selection. Simulations were conducted using cellular cooperative downlink systems for analyzing the performance of the proposed method, and the signal-to-interference-plus-noise cumulative distribution function and spectral efficiency cumulative distribution function were used as performance analysis indicators. Simulation results showed that the proposed algorithm could reduce the effect of interference and increase the performance of the desired signal. Moreover, the algorithm could efficiently reduce overheads and system cost by reducing the amount of resources required for information exchange.

• Proceedings of the KSRS Conference
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• 2003.11a
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• pp.1236-1238
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• 2003

The Earth's total magnetic field was extracted from on board TAM (Three Axis Magnetometer) observations of KOMPSAT-1 satellite between June 19th and 21st, 2000. In the pre-processing, the TAM's telemetry data were transformed from ECI (Earth Centered Inertial frame) to ECEF (Earth Centered Earth Fixed frame) and then to spherical coordination, and self-induced magnetic field by satellite bus itself were removed by using an on-orbit magnetometer data correction method. The 2-D wavenumber correlation filtering and quadrant-swapping method were applied to the pre-processed data in order to eliminate dynamic components and track-line noise, respectively. Then, the spherical harmonic coefficients are calculated from KOMPSAT-1 data. To test the validity of the TAM's geomagnetic field, Danish/NASA/French ${\phi}$rsted satellite's magnetic model and IGRF2000 model were used for statistical comparison. The correlation coefficient between ${\phi}$rsted and TAM is 0.97 and IGRF and TAM is 0.96. It was found that the data from on board magnetometer observations for attitude control of Earth-observing satellites can be used to determinate the Earth's total magnetic field and that they can be efficiently used to upgrade the global geomagnetic field coefficients, such as IGRF by providing new information at various altitudes with better temporal and spatial coverage.

• Journal of the Korea Fashion and Costume Design Association
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• v.10 no.2
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• pp.117-124
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• 2008

People have used the manner of expression "clothing" to find out and to symbolize the styles that suits one's roles, behaviors or altitudes. Moreover, the symbolic meaning of clothing is important as it reflects the culture of a time period as well at the life style of each classes of society. In the aspect in which clothing is critical data to re-examine a time period as to trace history, clothing is significant for understanding the characteristics of each time periods, and by focusing on women's wedding dress, a costume worn for one of the most essential ceremonies in one's life, this article studies how trends of each period have been symbolized through clothing. Thus, this study aims to set a foundation to understand the cultural features of a time period through the wedding ceremony. The article inquires about the hwalot to also understand its meaning during the period of its existence, and develops designs for modern wedding dresses for women. I. The wedding dress of women expressed the following meanings by using shapes, colors and patterns of the hwalot. 1) The formative art of hwalot is the ultimate beauty. 2) The wedding dress of women emphasized aesthetics. 3) The symbols praying for harmony between red and indigo, or the union of yin and yang indicates that marriage had been considered as a precious ceremony-an important matter of life. 4) The meaning of good auspice such as health, longevity, immortality, good luck and stability had been frequently used since people sought for new and eternal life. 5) The symbols of wealth and fame have been frequently used by those pursuing a wealthy life. 6) Marriage was considered as a union of families, and not a union of two individuals. II. This article presents two types of modern wedding dresses.