Metamorphosis

The purpose of this art is to present women\u27s transformed lives in society through my life experiences. As a woman from South Korea, a country that concretely separates women from men in a traditional way, I have expressed the continuous changes in my life brought about by changes in the society where I belong. I created various forms of cocoons that, like wombs, have protected me from negative effects. I have also presented the variety of transformed women\u27s lives in two types of art, sculpture and jewelry. The main concern for my thesis is to develop line work in the various methods possible in textile techniques, which bring pattern, rhythm, space, boundaries, scale, symmetry, and asymmetry. Through these works, I have captured the images that represent women\u27s characteristics, such as softness, strength, and grace

Effects of corrosion prevention compounds and overload induced residual stress field on fatigue life in aluminum alloy

Corrosion-Prevention Compounds (CPC) are commonly used to prevent corrosion in the aircraft industry. The presence of corrosive environment (salt-fog, water-fog, even dry air) on aircraft structures has detrimental effects on the integrity of aircraft components which reduces the fatigue life and may accelerate the crack growth rate in the structures. This thesis work is aimed at identifying the effect of CPC and corrosion fatigue on the fatigue life of test specimen. This study describes the results of an experimental study on aluminum alloy 2024-T3 with center-crack specimen to investigate the effect of CPC on fatigue life. Generally, these compounds contain a volatile solvent, corrosion inhibitors, and a barrier film such as grease or wax. The mechanism of corrosion fatigue is studied with the application of CPC. The corrosion fatigue with the presence of water-vapor reduces the total fatigue life. The fatigue life with the CPC treatment is shown to increase the fatigue life due to the protection from the corrosive environment (water-vapor). Test results are obtained for various stress ratios and frequencies; with and without the CPC treatment, under constant amplitude fatigue loading in water vapor. Second objective of thesis work is to investigate the effect of periodic overloads on the fatigue life under constant amplitude fatigue loading. The results show that the fatigue life increases due to the periodic overloads in 2024-T3 aluminum alloy. The interactions between overloads that are controlled by the spacing cycles between overloads and overload ratios are also examined. The maximum interaction to achieve a maximum increase in fatigue life is observed that the best spacing cycle between overloads has been found to be in the range from 400 to 2000 cycles for an overload ratio of 1.7. Micrograph of the failed specimen surface is examined by using Scanning Electron Microscope (SEM) to investigate the failure processes and the formation of crack surface along the crack front in the crack growth surface. It is indicated that two distinct failure modes are found. These are ductile fracture and brittle fracture. The transition from the ductile mode to brittle mode is observed in this thesis work

Epidemiological Aspects of Exotic Malaria and Dengue Fever in Travelers in Korea

In order to compare the epidemiological aspects of exotic malaria (EM) and dengue fever (DF) imported by travelers in Korea, we have analyzed the current state both of the disease incidence and related risk factors. A total of 345 cases of EM occurred between 2001 and 2008 in Korea, and the average incidence rate per 100,000 population was 0.091. A total of 252 of DF cases occurred during the same period, and its rate was 0.063. While most of the EM and DF prevalence occurred in summer, prevalence in spring and winter was more prominent for EM (P < 0.05 ~ P < 0.01), while outbreaks in summer were more frequent for DF (P < 0.01). In Korea, more males were infected with EM and DF than females (P < 0.01). The remarkable difference between gender distributions in Korea is believed to reflect cultural differences in terms of work and travel. In both diseases, the manhood age bracket (20 - 39 years old) is possible due to increased oversea activities and travel. Moreover, reported EM cases in several prefectures in the regions of Asia and Africa were widely spread by the appropriate vector of mosquitoes, while the vectors of DF in the region of Asia are limited

Location Tracking of Moving Crew Members for Effective Damage Control in an Emergency

In an emergency, the commanding officer may have limited information, and crew members may behave differently compared to how they behaved during training. In an emergency situation, if the commanding officer is aware of each crew member's location and role in that situation, he can disseminate orders expeditiously and precisely. To realise a faster and more precise dissemination of orders through better awareness of each crew member's location and role, real-time crew member tracking is needed. The technical feasibility of a real time crew-tracking system based on a wireless sensor network has been studied, with the intent to improve effective commanding in an emergency. Herein, location tracking was achieved using instrumentation consisting of ZigBee tags, routers, and gateways, which were used to record the location and role data of moving crew members on a full-scale ship.Defence Science Journal, 2011, 61(1), pp.57-61, DOI:http://dx.doi.org/10.14429/dsj.61.50

From Text to Sign Language: Exploiting the Spatial and Motioning Dimension

PACLIC 19 / Taipei, taiwan / December 1-3, 200

mtCO1-based population structure and genetic diversity of Pacific oyster *Crassostrea gigas* populations acquired from two farms in South Korea

Since the early 1990s in South Korea, climatic and anthropogenic factors have incurred the reduction of the wild seeds of the Pacific oyster, Crassostrea gigas, which raised concerns about losing genetic diversity and accelerating genetic deterioration. We assessed the genetic diversity of C. gigas populations from two farms (Tongyeong and Gadeokdo) on the southern coast, where about 80% of the cultivated oysters in Korea are produced. Tongyeong showed slightly higher diversity than Gadeokdo, but both populations had a similar genetic structure characterized by low nucleotide diversity. Comparative haplotype analyses provided data supporting genetic features of the populations that include (1) weak genotype-locality relationship, (2) low levels of gene flow between populations, and (3) possible seasonal fluctuation of genetic variation within a population. Furthermore, the highly alike haplotype network patterns were observed between the wild and farm populations as well as among the populations in neighboring countries, which suggests that the genetic structure is conserved between wild and hatchery populations, and geographic proximity has minimal influence on the genetic composition

mtCO1-based population structure and genetic diversity of Pacific oyster \u3ci\u3eCrassostrea gigas\u3c/i\u3e populations acquired from two farms in South Korea

Since the early 1990s in South Korea, climatic and anthropogenic factors have incurred the reduction of the wild seeds of the Pacific oyster, Crassostrea gigas, which raised concerns about losing genetic diversity and accelerating genetic deterioration. We assessed the genetic diversity of C. gigas populations from two farms (Tongyeong and Gadeokdo) on the southern coast, where about 80% of the cultivated oysters in Korea are produced. Tongyeong showed slightly higher diversity than Gadeokdo, but both populations had a similar genetic structure characterized by low nucleotide diversity. Comparative haplotype analyses provided data supporting genetic features of the populations that include (1) weak genotype-locality relationship, (2) low levels of gene flow between populations, and (3) possible seasonal fluctuation of genetic variation within a population. Furthermore, the highly alike haplotype network patterns were observed between the wild and farm populations as well as among the populations in neighboring countries, which suggests that the genetic structure is conserved between wild and hatchery populations, and geographic proximity has minimal influence on the genetic composition