• 한국군사과학기술학회지
• /
• 제18권2호
• /
• pp.101-108
• /
• 2015

In this paper, we have proposed a separable nose cap and its opening device to protect a seeker's window from aerodynamic heating and to decrease the drag force on missile body. The nose cap should be promptly deployed to secure the view field of seeker when it is needed. This cap consists of two nose cap structures and separation devices such as pyro puller and pusher. The performance of pyro puller was fully verified through analyses and several kinds of operating tests. We can obtain a sufficient confidence level of the pyro puller through many operating tests under various environments.

• Journal of Microbiology and Biotechnology
• /
• 제19권8호
• /
• pp.803-809
• /
• 2009

Recent evidence has revealed the occurrence of an apoptotic phenotype in Candida albicans that is inducible with environmental stresses such as acetic acid, hydrogen peroxide, and amphotericin B. In the present study, we found that the Chinese herbal medicine Baicalein (BE), which was one of the skullcapflavones, can induce apoptosis in C. albicans. The apoptotic effects of BE were detected by flow cytometry using Annexin V-FITC and DAPI, and it was confirmed by transmission electron microscopy analysis. After exposure to 4 ${\mu}g$/ml BE for 12 h, about 10% of C. albicans cells were apoptotic. Both the increasing intracellular levels of reactive oxygen species (ROS) and upregulation of some redox-related genes (CAP1, SOD2, TRR1) were observed. Furthermore, we compared the survivals of CAP1 deleted, wild-type, and overexpressed strains and found that Cap1p attenuated BE-initiated cell death, which was coherent with a higher mRNA level of the CAP1 gene. In addition, the mitochondrial membrane potential of C. albicans cells changed significantly (p<0.001) upon BE treatment compared with control. Taken together, our results indicated that BE treatment induced apoptosis in C. albicans cells, and the apoptosis was associated with the breakdown of mitochondrial membrane potential.

• 복식
• /
• 제59권4호
• /
• pp.26-40
• /
• 2009

The custom of the flag sticked in a military cap involves the symbolic mark. That is, it makes the procession of an army clear and makes the convenience of activity possible. This custom was uniquely practiced at several countries. At Il dynasty($1258{\sim}1411$), Timurid dynasty($1369{\sim}1508$), Mughal dynasty($1526{\sim}1858$) was succeeded this custom by based on blood relationship for $13th{\sim}16th$ century on the diachronic viewpoint. And these countries have cultural correlation by regional paradigm, namely Islamic cultural area. Meanwhile, this custom of Ming dynasty and joseon dynasty appeared in $15th{\sim}17th$ century as official system. Expecially, one of joseon dynasty maintained for a short time than other countries because of jangpyo[章標] system which was more efficient than the sticked flag. On the synchronic viewpoint, this custom was the common and necessary status quo for the efficient expansion of territory and military management.

• 한국군사과학기술학회지
• /
• 제4권2호
• /
• pp.52-59
• /
• 2001

In this paper, we have proposed a capability of applying Global Positioning System(GPS) to cannon laying. High precision GPS positioning can be used for measuring precise positions and angles. Therefore, we have tested on applying GPS positioning technique to measurement of positions and angles, which related to cannon laying. First of all, we have determined a GPS reference position using various positioning methods. Then we have carried out several tests that are process of taking corner angles between neighboring two vectors. Each vector can be calculated by post/real time positioning of two GPS antennas placed on the both ends of the howitzer. The Comer Angles from Post processing(CAP) are compared with the other Corner Angles from Real time positioning(CAR). As the results, we have an agreement between CAP and CAR within 0.25 mil average, 0.29 mil standard deviation. Finally, we have discussed about the capabilities and problems in artillery arrangement using GPS.

• 한국의류학회지
• /
• 제47권4호
• /
• pp.684-695
• /
• 2023

The Korean Volunteer Corps (KVC) and the Korean Independence Army (KIA) were Korea's main armed forces that led the independence movement against Japan. KVC members were partly merged into the KIA as the army's first branch in 1942. This study examines two different styles of KVC military uniforms: one that complies with the Uniforms Act of the Army of the Chinese Nationalist government and one that uses the same style without a field cap and a belt. The KIA's first branch had three different uniforms: one similar to that of the KVC, one belonging to the KIA and following the Army Uniform Protocol, and one influenced by the U.S. Army. The KVC and the KIA's first branches had insignias representing their identity. The former wore a distinctive insignia with the corps' name, whereas the latter had a cap badge with Korean national symbols under the Army Insignia Protocol. KVC members who may have initially worn their previous uniform in the early days of joining the KIA later adopted the KIA style. This study is expected to offer basic resources to reproduce KVC and KIA military uniforms and verify the authenticity of related artifacts.

• 한국군사과학기술학회지
• /
• 제7권3호
• /
• pp.157-164
• /
• 2004

This is a boundary integral formulation for elastic shallow shell structures subjected to both membrane and bending loads. Fundamental solutions for shell actions are determined from the plate solutions and, finally the corresponding kernel functions for shell BIEs can be constructed. It is illustrated by solving an example of uniform load of spherical cap.

• Tuberculosis and Respiratory Diseases
• /
• 제78권3호
• /
• pp.232-238
• /
• 2015

Background: A relationship between low vitamin D levels and the development or outcomes of respiratory diseases has been identified. However, there is no data on the vitamin D status in patients with acute eosinophilic pneumonia (AEP). We evaluated the vitamin D status in patients with AEP among South Korean military personnel. Methods: We prospectively compared the serum levels of total 25-hydroxyvitamin D [25(OH)D], 25(OH)D3, and 25(OH)D2 among patients with AEP, pulmonary tuberculosis (PTB), and community-acquired pneumonia (CAP). Results: In total, 65 patients with respiratory diseases, including AEP (n=24), PTB (n=19), and CAP (n=22), were identified. Of the 24 patients with AEP, 2 (8%) had deficient total 25(OH)D levels (<10 ng/mL), 17 (71%) had insufficient total 25(OH)D levels (${\geq}10$ to <30 ng/mL), and only 5 (21%) had sufficient total 25(OH)D levels (${\geq}30$ to <100 ng/mL). The difference in the total 25(OH)D levels among patients with AEP, PTB, and CAP was not statistically significant (p=0.230). The median levels of total 25(OH)D, 25(OH)D3, and 25(OH)D2 were 22.84, 22.84, and 0.00 ng/mL, respectively, and no differences in the 25(OH)D level were present among patients with AEP, PTB, and CAP with the exception of the total 25(OH)D level between patients with AEP and PTB (p=0.042). Conclusion: We have shown that low vitamin D levels are frequently found in patients with AEP and are comparable with those in patients with PTB and CAP.

• 한국군사과학기술학회지
• /
• 제23권1호
• /
• pp.37-42
• /
• 2020

This study is for a bulletproof experiment through speed acceleration of steel ball(2.385 mm) at the laboratory level. The secondary propulsion method is used for speed acceleration, which uses a sabot assembly consisting of a sabot body, a plunger, water, and a sabot cap. At the core of the secondary drive, it is important that the energy in the water of the private particle is transferred well to the steel ball. The experiment was conducted by selecting a plunger that pushes water and water charged with variables. judging that the longer the contact time, the greater the energy transferred to the steel ball. As a result of experiments with each variable, the amount of water does not affect the speed acceleration efficiency of the steel ball and, when the length of the plunger is increased by 200 %, the speed of the steel ball can be accelerated up to 130 m/s.

• 한국군사과학기술학회지
• /
• 제12권3호
• /
• pp.259-265
• /
• 2009

In the traditional percussion locks of small arms, a firing pin is struck by a hammer rotating on a single center of rotation, which makes the percussion mechanism simple and reliable. In order to strike the firing pin by the hammer, however, the firing pin should be located within the radius of rotation of the hammer. As the distance between the striking point of the firing pin and the center of rotation of the hammer becomes longer, the radius of rotation of the hammer should also be increased, which results in the increase of the volume and weight of the small arms because the hammer needs the more space for its operation inside of the small arms. In this paper, a link type percussion lock was newly proposed in order to overcome the limitation of designing small arms when using traditional percussion locks, as mentioned above. The link type percussion lock was modeled by using multi-body dynamics software and designed to satisfy the requirements such as striking force level of the hammer exerting on the firing pin enough to detonate the percussion cap of ammunitions and the safety on the accidental drop. It was applied to the newly developed dual-barrel weapon system, in which the weight and overall length are important design factors, and verified by durability test and drop test on the ground.

• 한국의류산업학회지
• /
• 제10권2호
• /
• pp.138-146
• /
• 2008

Opera costumes are a tangible medium to directly affect how opera singers performed. Therefore, stage costumes have been designed in various ways to reflect intentions of directors. This study examines modernization of opera costumes. For this study, the author worked as one of costume design staff for "Faust" which was played in Sung-Nam Art Center from November 24, 2005 to November 27, 2005 in commemoration of the opening of the center. The following outcomes of the supporting actors are drawn from this study. Martha wore a grey jacket and a long skirt with slash. Grey suit symbolized chastity but tight long skirt with slash means sexy. Valentin wore military and combat uniforms to express that he was a soldier. The military uniform represented the situation before the war and the combat uniform symbolized the situation after the war. Rather short trousers, a white tweed jacket, purple flower ornament, a light green vest, and a beret were used to express Wagner, who looked ridiculous and always tried to flirt. Overalls, a blue jumper, and a scarlet baseball cap were used to make Siebel look naive and homely. Modern opera costumes now help reduce the time and space between stage and audience, improve economic efficiency and meet the audience's needs for various style.