• Korean Journal of Hydrosciences
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• v.3
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• pp.97-104
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• 1992

To design the minor structures in the small watersheds, it is required to calculate the peak discharge. For these calculations the simple peak flow prediction equations, the unit hydrograph method. the syntheic unit hydrograph methods or the runoff simulation models are adopted. To use these methods it is generally requried to know the amount and the distributions of the design rainfall; which are the uniform distribution, the trangular distribution, the trapezoidal distribution, or the Huff type distribution. In this study, the peak discharges are calculated by the different rainfall distributions and the results are compared.

• Journal of the Korean Home Economics Association
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• v.19 no.4
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• pp.1-8
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• 1981

French Revolution, while re-establishing the political and social structure, had also changed the cultural conditions of French life and manners. clothing, as with other features of daily life, had some characteristic changes, which this article tried to specify and related with the social conditions. Those specific changes pointed out as typical and discussed herewith are: 1. Clothing manipulated as a political identity kit. 2. Simplification of colors and forms of men's costume. 3. Tendency toward uniformity. 4. Clothing as the symbol of political utopia. 5. The attraction of military uniform. 6. Moral decadence.

• Fashion & Textile Research Journal
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• v.16 no.5
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• pp.706-718
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• 2014

Ideology which symbolizes the belief system about the order of human society represents itself in a concrete form through dress which reflects material and conceptual world. In the early 1960s Korea, where a civil revolution and a military coup took place, good examples of dress representing ideology could be found. This study investigates the dress representing ideology of the period, and examines its manifestation and aspect of transition. Literature survey and case study were conducted. The following results were obtained: First, dress representing ideology was symbolically verifying its differences and was changing with the course of time. There were the flow going down from the government, and the flow going up from the movement of the civilian. Through this process, design elements of ideological dress were combined in a dialectic way to form a new representational dress such as Jaegunbok. Second, costly and luxurious clothes meant a tool to rule over people, and the opposition was uniform meaning equality. In 1960 Korea, black waves of school uniforms appeared to lead the social change. A year later, the military government seized power in a 5.16 coup and it enforced uniform upon every people to achieve equal austerity and modernized spirit. Lastly, cotton, which was originated from Gandhi's movement in India, was symbolizing nationalism till the early 1960s in Korea meaning the funding own development with own resources.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.20 no.10
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• pp.366-373
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• 2019

Combat uniforms require higher tensile and tear strength than civilian products, and applied infrared reflectance from the recently developed nighttime fluoroscopy equipment to ensure combatant survival at night. Unlike other uniforms for civilian use, combat uniforms require durability against laundering because they may not be supplied again, once originally provided. Therefore, this study examined the changes in strength and changes in infrared reflectance after multiple washing of combat uniforms. The experiment confirmed that the strength change after the washing of combat uniforms 15 times was maintained in the same manner as the result after washing five times. In the case of infrared reflectance, the difference in reflectance after multiple washing treatments was greater than that in the case where washing was not performed. Therefore, although the durability in the case of combat uniforms is strong, it is necessary to maintain a reflectance higher than a certain level through the development of materials and the development of dyes.

• The Korean Journal of Air & Space Law and Policy
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• v.19 no.1
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• pp.79-107
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• 2004

Shielding theory is to allow the construction of a structure that would be shielded by existing permanent structures even thought such structure extends above the height limits prescribed for such zones. This theory is mentioned as recommended practices in ICAO Annex, and is adopted, with modification, in the current Military Airbase Law, amended in August 26th 2002. However, the Military Airbase Law adopts shielding standard allowing 45 meters uniformly, which is a unique standard compared to other countries shielding guideline. The basic principle in applying the shielding theory is, after considering the circumstances of location of shielded structure, whether such structure has physical effect on aeronautical operations. Based upon the basic principle of shielding theory, the uniform application of shielding standard in the Military Airbase Law would undermine the safety of aeronautical operations. This article is to review subsection 2 of section 8 of the Military Airbase Law, which adopts modified shielding theory, and is to suggest better guideline. From a comparative analysis perspective, shielding guidelines of ICAO and other countries will be discussed. Based upon this discussion, the general problems of shielding theory and the specific problems in the Military Airbase Law will be examined. Finally, this article suggests the case-by-case application of shielding theory, considering circumstances of location, for the purpose of ensuring aviation safety.

• Economic and Environmental Geology
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• v.33 no.1
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• pp.61-75
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• 2000

Through modeling fault network using thin plate finite element technique in the San Andreas Fault system with slip rate over 1mm/year, as well as elevation, heat flow, earthquakes, geodetic data and crustal thickness, we compare the results with velocity boundary conditions of plate based on the NUVEL-1 plate model and the approximation of deformation in the Great Basin region. The frictional and dislocation creep constants of the crust are calculated to reproduce the observed variations in the maximum depth of seismicity which corresponds to the temperature ranging from $350^{\circ}C$ to $410^{\circ}C$. The rheologic constants are defined by the coefficient of friction on faults, and the apparent activation energy for creep in the lower crust. Two parameters above represent systematic variations in three experiments. The pattern of model indicates that the friction coefficient of major faults is 0.17~0.25. we test whether the weakness of faults is uniform or proportional to net slip. The geologic data show a good agreement when fault weakness is a trend of an additional 30% slip dependent weakening of the San Andreas. The results of study suggest that all weakening is slip dependent. The best models can be explained by the available data with RMS mismatch of as little as 3mm/year, so their predictions can be closely related with seismic hazard estimation, at least along faults where no data are available.

• Journal of the Korea Institute of Military Science and Technology
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• v.14 no.1
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• pp.22-29
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• 2011

Using the numerical code for the interior ballistics, the performance of the interior ballistics with the characteristic of the ignition-gas injections has been investigated. The ignition gas has been assumed to be injected into the chamber with 3 cases. As the results of analysis, when the ignition-gas has been injected into all chamber area, the pressure distributions of the chamber of the interior ballistics have been uniform and the differential pressure has been stable. The ignition-gas has been injected into the partial area of the chamber, however, the pressure distributions and the differential pressure have been unstable. The case using the longer ignition injector, therefore, seems to be more suitable to improve the stability of the interior ballistics.

• Journal of the Korea Institute of Military Science and Technology
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• v.20 no.3
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• pp.376-383
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• 2017

This paper describes the gyroscopic stability and the drag characteristics of the smart munition with a course correction fuze(CCF). A ballistic analysis was conducted to figure out the effect of the canards on the gyroscopic stability of the projectile. The analysis used the commercial ammunition performance evaluation software: Projectile Design and Analysis System(PRODAS). In particular, we compared the PRODAS analysis results to real field test results to investigate the influence of the CCF mounted projectile. In addition, some ballistic simulations were carried out to provide the conditions suitable for wind tunnel tests. Experimental results show that the added drag force by the canards is almost uniform regardless of the Mach number when the projectile is at the normal position where the angle of rotation and the angle of attack are both 0 degrees. However, as the angle of attack of the projectile increases, the additional drag force depends on the deflection of the canards.

• Journal of the Korea Institute of Military Science and Technology
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• v.14 no.3
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• pp.524-531
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• 2011

The cryogenic vessel, storing a liquified solutions as LOX and $LN_2$, consists of a external vessel, internal vessel, thermal insulator and internal support. The internal support should be satisfied with mechanical strength not only to support weight of internal tank but also to maintain uniform space between external and internal tank in spite of external mechanical shock. However, excessive structure design of internal supports is able to increase the amount of heat conduction and the rate of vaporization. The thermal insulator, filled with space between a external and internal vessel, reduces the rate of heat transfer and guarantees the standing time of cryogenic vessel. Especially powder type of insulator has low thermal conductivity and reduce the specification of structure design. In order to evaluate the effect of insulator on structure design, the experiment set-up simulated cryogenic vessel was tested in shock environment according to thermal insulator. As a result, the behavior of internal support under external shock was understood and the design criteria was able to be suggested.

• Journal of the Korean Society of Clothing and Textiles
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• v.24 no.2
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• pp.226-236
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• 2000

The mutual relation dynamics between the chulik and the Po for man in the period of chosun dynasty. The objectives of this study are to find out the mutual relation between the chulik and the Po for man-symeui, danryeong, changeui, jikryeong-, te change of chulik, and the ideas that made this change. Conclusions are decribed as followes: 1. The pattern of chulik and symeui is same, and they consist of bodice and skirt's length of the chulik was 1 : 1.3∼2 and it is effected by symeui. And symeui was effected by pratical structure of the chulik. 2. The functions of the chulik were the underwear of danryeong and the upperwear as military uniform. And then the length of chulik was shorter than danryeong in the early period of shosun dynasty. The sleeves were changed as large as danryeong in the late period of chosun dynasty. It is assumed that the changes were to be a functional underwear and to appear authority as upperwear. 3. Chulik as the underwear was hardly worm in the 17th centuries, and changeui was widely enjoyed instead of it. The reason of this change is that the pragmatism was emphasied in that period. 4. Chulik was widly worm instead of court dress, until the mid of 17th century after war. It was effected by outer factor of the war. And jikryeong was widly worm instead of chulik in the late period of chosun dynasty. It shows that military officers wanted to appear authority.